SHR-650II cement hydration heat meter wholesale price

Wholesale price of R cement hydration heat tester
1. Purpose and principle
This instrument is designed according to the relevant provisions of National Standard B "Determination Method for Cement Hydration Heat (Dissolution Heat Method)" of. Suitable for any hydration age of medium-heat Portland cement, low-heat slag Portland cement, ordinary Portland cement, slag Portland cement, volcanic ash Portland cement, fly ash Portland cement, etc. Chemistry calorimetry. This instrument can also be used for other cement varieties when the dissolved heat method is specified to measure the heat of hydration.
Measurement of the heat of hydration by the heat of solution method is based on Geis' law of thermochemistry, that is, the thermal effect of a chemical reaction is only related to the initial state and final state of the system and has nothing to do with the reaction pathway. It is to use unhydrated cement and hydrated cement of a certain age to be dissolved in a certain concentration of standard acid under the condition that the temperature around the calorimeter is constant, and the difference in dissolution heat is measured, which is the cement at the specified age. The heat of hydration released during the period.
2. Main technical specifications of cement hydration heat tester (dissolution heat method) instruction manual
. Water tank temperature: ℃.℃
. Vacuum bottle volume: approx., cooling rate is full ratio After the water at room temperature and high ℃ is allowed to stand for several minutes, ℃. ℃
. Acid solution stirring rod speed: r
. Motor power: Voltage: Speed
. Beckman differential thermometer differential range: ~℃ Graduation value: ℃
. Instrument Overall dimensions (length, width and height):
. Net weight of the instrument:
3. Structure of instruction manual for cement hydration heat measuring instrument (heat of solution method)
Type II product is equivalent to two single models The products are merged. Type II can conduct two tests at the same time, which is more efficient than the single-head model. It is mainly composed of the following parts:
Constant temperature water tank part:
The constant temperature water tank is a container with a depth of about 100 liters and a volume of about 1 liter. The tank is equipped with a cylinder holder for placing the test inner cylinder, and is equipped with a control rod. There is an overflow pipe at the water level of the sink and a drain pipe, and a drain valve is installed at the outlet of the drain pipe.
The constant temperature water tank is placed in the casing. The bottom of the constant temperature water tank has a thermal insulation layer with good thermal insulation performance, and the upper part is equipped with a cover plate.
. Test inner cylinder part:
The test inner cylinder consists of a cylinder body, a cylinder cover, a foam insulation sleeve, a vacuum bottle, a Beckman differential thermometer and a feeding funnel. The inner test cylinder can move up and down along the chute on the cylinder base. When it reaches the lowest position, rotate the inner cylinder at an angle to fix it in that position. There is a positioning block above the cylinder seat, which can be used to accurately adjust the position of the test inner cylinder (the instrument has been debugged before leaving the factory and generally does not need to be modified). The cylinder body, cylinder cover and cylinder seat are all made of stainless steel. A thermal insulation sleeve and a vacuum bottle are placed inside the cylinder. The vacuum bottle has an acid-resistant lining. The lining is used to hold the acid for testing. The lining is cleaned and reused. The vacuum bottle and its lining are sealed and insulated with a cork stopper fixed under the cylinder cover. There is a hole in the stopper to insert a Beckman thermometer, acid stirring rod and addition funnel. The cylinder body and cylinder cover are sealed with a shaped sealing ring. After tightening the butterfly nut on the cylinder cover, it can ensure that the water in the water tank does not penetrate into the cylinder.
Power part:
Each head of the power part consists of two motors, motor sleeves, beams, large and small pulleys, cooling pipes, water tank stirring rods, acid stirring rods, spindles, chucks, synchronization Belts, etc.
The motor cover is fixed on the partial cover of the water tank. The two motors are installed in the inner cavity of the motor cover. The lower motor is directly equipped with a coupling of the water tank stirring rod. The upper motor is equipped with a small pulley. The cross beam is placed outside the motor cover. circle, it can rotate around the axis of the motor to adjust the position of the stirring rod. After adjustment, turn the locking handle on the beam to lock the beam position. The main shaft hole at the other end of the beam is equipped with a bearing and a main shaft sleeve. There is a main shaft that can move up and down in the main shaft sleeve. The fixed screw on the adjustment shaft can move the main shaft up and down, and the height of the stirring rod in the vacuum bottle can be adjusted. The lower end of the spindle is equipped with a chuck, and the acid stirring rod passes through the hole in the cylinder cover in the vacuum bottle and is clamped on the chuck. The upper end of the spindle sleeve is equipped with a large pulley, driven by a synchronous belt. There are cooling pipes around the motor for cooling.
, Control part
The control part consists of a controller, a temperature sensor and a heating tube. The heating pipe is installed in the constant temperature water tank, and the temperature sensor is inserted into the socket on the water tank cover. There is a temperature display on the controller, which has been adjusted to ℃.℃ before leaving the factory. Generally, users do not need to adjust it. There are toggle switches on the controller that control the rotation of the left and right water tank stirring rods and acid stirring rods, which can be turned on and off respectively as needed.
4. Instructions for use of cement hydration heat tester (dissolution heat method) Installation and use of the instrument
. The instrument must be placed in a constant temperature room with a temperature of ℃ and placed on a horizontal workbench. Pad ~ rubber sheet.
. Use a suitable soft hose or plastic tube to connect the water inlet of the motor cooling pipe on the back of the instrument to the cold water source (tap water or constant temperature water bath). The outlet pipe can be connected to the constant temperature water bath or sewer. Connect the overflow pipe and drain pipe to the sewer. Close the drain valve. Check whether all pipes are clear. Add water to the sink until water comes out of the overflow pipe.
. At the beginning of the test, the test inner cylinder should be lifted from the water tank to a position above the water surface and fixed, open the test inner cylinder cover, and put the vacuum bottle, acid-resistant lining, and acid stirring rod into the inner cylinder. Cover the test cylinder cover, tighten the wing nut, seal the cylinder cover, and then slowly sink the inner cylinder into the water to fix it.
. Insert the temperature sensor into the jack on the sink cover and connect it to the controller, and connect the other plug-ins to the corresponding sockets on the controller. Turn on the power, check whether the grounding is reliable, and turn on the power switch of the controller.
. When the water temperature in the sink is higher than .℃, you should slowly put ice cubes or cold water into the sink. Stop when the temperature is slightly lower than ℃. At this time, the system will automatically raise the water temperature to Standards specify the temperature and maintain a constant temperature.
. Loosen the locking handle on the cross beam, turn the cross beam to a position where the main shaft and the acid stirring rod are on the same axis, loosen the chuck, lift the stirring rod upward and install it into the chuck, and adjust it After adjusting the height of the acid stirring rod, tighten the chuck, fine-tune the angle of the beam so that the acid stirring rod is concentric with the hole in the barrel cover, and lock the locking handle on the beam. Assemble the Beckman differential thermometer and filling funnel.
. Complete the operation according to the steps specified in the test standards.
After the test is completed, first turn off each action one by one, and then turn off the main power switch. Unplug the power plug, and then take out the Beckman differential thermometer, charging funnel, acid stirring rod, acid-resistant lining, etc., clean them and store them properly for later use. After the test inner cylinder is covered, place it under the cylinder seat and cover the movable cover of the water tank.
5. Precautions in the instruction manual of cement hydration heat tester (dissolution heat method)
It is forbidden to turn on the power and operate without adding water in the water tank to prevent accidents.
. Before adding water to the water tank, the lid of the test inner cylinder should be sealed and moved to the bottom of the cylinder seat to prevent the overflow pipe from being damaged when the inner test cylinder is filled with water and then placed in the test cylinder. There was no time to drain the water, and a large amount of water overflowed from the sink.
. Care should be taken when loading and unloading the acid stirring rod from the spindle chuck to prevent the acid stirring rod from falling from a height into the vacuum bottle and damaging the vacuum bottle.
. The part where the Beckman thermometer is inserted into the acid solution and the surface of the cork stopper should be evenly coated with paraffin and other anti-acid coatings. Before the test, you should carefully check whether the anti-acid coating is intact.
6. Electrical schematic diagram of the instruction manual of RⅡ Cement Hydration Heat Tester (Dissolution Heat Method)
Appendix 1 Supplementary Instructions for Beckman Thermometer
This supplementary instruction can be used to help understand Beckmann The instructions for use written by the thermometer manufacturer and the description of the zero adjustment point of the Beckman thermometer in the national standards are for reference by test personnel.
Structural diagram of Beckmann thermometer
How to read the Beckmann thermometer sub-scale: Gently invert the Beckmann thermometer (temperature-sensing bulb upward), so that the mercury in the spare bulb is concentrated in the left single-sided glass tube. Using a magnifying glass of about 100 times, you can read the sub-scale temperature with an accuracy of .℃ (indicated value ℃ per division). Note: When inverting the Beckman thermometer to read, make sure that the mercury in the capillary does not flow into the backup bulb. . When inverting the Beckman thermometer, be gentle to avoid the mercury in the spare bulb falling into the capillary tube.
Before the cement hydration heat test, the Beckman thermometer should be zeroed according to national standard B. The method is as follows:
First, the temperature of the test environment should be controlled to keep it within ℃. This temperature should be maintained from the beginning of zero adjustment to the end of the test, and the temperature fluctuation range should be minimized.
The so-called zero adjustment actually refers to adjusting the distribution ratio of the mercury amount in the temperature sensing bulb and the spare bulb under the test environment temperature (such as .℃) (i.e. the adjustment of the mercury amount, see Beckman Thermometer Manufacturer for details) instructions), keep the main scale value of the Beckman thermometer (i.e., the mercury column reading) somewhere near ℃ on the main scale, and record this tiny reading, (try to be as accurate as possible, such as .℃, so that the temperature can be measured Range expansion), and record the reading on the sub-scale at the same time (the reading in the .℃ test environment is generally around .℃).
The corresponding Celsius temperature when the Belleville thermometer referred to in National Standard B is ℃, and the temperature of the Belleville thermometer referred to in the appendix table of National Standard B is equal to the temperature of an ordinary thermometer, that is, the main scale and sub-scale in the above entries. The sum of the two readings. For example, .℃+.℃.℃, record this value, that is. This value will be used later when calculating the heat capacity of the hydration meter. (+).