Calcium carbide gas generation amount measuring device

Abstract

The utility model relates to a calcium carbide gas generation amount measuring device which comprises a reaction cylinder, a piston, a U-shaped pressure gauge, a coiled pipe and a controller, metering scales are arranged on the reaction cylinder, a feeding pipe and a valve are arranged at the top of the reaction cylinder, a sealing cover is in threaded connection with the top of the feeding pipe, a valve plate is rotationally arranged in the feeding pipe, and the valve plate is connected with a motor arranged on the outer wall of the feeding pipe. The piston is arranged in the reaction cylinder, the lower surface of the piston is connected with a sliding rod, the sliding rod penetrates through the bottom of the reaction cylinder, a screw penetrates through the bottom of the reaction cylinder in a threaded mode, and the upper end and the lower end of the screw are rotationally connected to the lower surface of the piston and connected with a hand wheel respectively. One end of the coiled pipe penetrates out of the upper part of the side wall of the reaction cylinder and is connected with a refrigerating device arranged on the outer wall of the reaction cylinder. The top of the reaction cylinder can be sealed before calcium carbide reacts with water, and the reaction cylinder can be cooled, so that the temperatures before and after the reaction are consistent, and the accuracy of gas generation amount measurement can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas evolution measurement, and particularly relates to a calcium carbide gas evolution measurement device. Background Art

[0002] Calcium carbide is the main product of calcium carbide. Calcium carbide reacts with water to generate acetylene gas and calcium hydroxide, and heat is released during this chemical reaction process. Acetylene is an important industrial raw material, widely used in fields such as welding, cutting metals, and organic synthesis. However, in order to determine the quality of the purchased calcium carbide, gas production enterprises need to measure the gas evolution of the purchased calcium carbide.

[0003] In the prior art, such as the "Device for Measuring the Gas Evolution of Calcium Carbide Residue" disclosed in CN220745799U, after acetylene and water are put into the sealed reaction chamber formed by the gas generator through the wet acetylene material feeding part, the air pressure in the sealed reaction chamber is detected by a U-shaped manometer, and then the air in the sealed reaction chamber is extracted by a graduated syringe until the air pressure in the sealed reaction chamber is equal to the external air pressure. The gas evolution of calcium carbide can be detected by the scale difference on the syringe before and after extraction.

[0004] However, in the prior art, calcium carbide and water are first put into the sealed reaction chamber, and then the top of the reaction chamber is sealed. In this way, some of the gas generated by the reaction of calcium carbide and water will leak out through the wet acetylene material feeding part, and the temperature in the sealed reaction chamber will increase after the reaction, affecting the accuracy of the gas evolution measurement. Content of the Utility Model

[0005] The utility model provides a calcium carbide gas evolution measurement device, which can seal the top of the reaction cylinder before the reaction of calcium carbide and water, and can also cool the reaction cylinder to make the temperature consistent before and after the reaction, which is beneficial to improving the accuracy of the gas evolution measurement.

[0006] The technical solution adopted by the utility model:

[0007] A calcium carbide gas generation measuring device includes a reaction cylinder, a piston, a U-shaped manometer, a serpentine tube and a controller. The reaction cylinder is made of a hard transparent material. A measurement scale is provided on the side wall of the reaction cylinder. A feeding pipe and a valve are provided at the top of the reaction cylinder. The top of the feeding pipe is threadedly connected with a sealing cover. A valve plate is rotatably provided in the feeding pipe. The valve plate is connected to a motor provided on the outer wall of the feeding pipe. The piston is slidably provided in the reaction cylinder. The lower surface of the piston is connected with a sliding rod. The sliding rod slidably penetrates through the bottom of the reaction cylinder. A screw rod is threadedly penetrated through the bottom of the reaction cylinder. The upper and lower ends of the screw rod are respectively connected to the lower surface of the piston and a hand wheel. The U-shaped manometer and the serpentine tube are both provided in the reaction cylinder and above the piston. A temperature sensor is provided on the upper part of the U-shaped manometer, and one end thereof penetrates through the upper part of the side wall of the reaction cylinder. Two sides of the serpentine tube respectively penetrate through the side walls of the reaction cylinder. The serpentine tube is connected to a refrigeration device provided on the outer wall of the reaction cylinder. The refrigeration device is used to convey cold air to the serpentine tube. The controller is electrically connected to the refrigeration device and the temperature sensor.

[0008] Further, the refrigeration device includes a refrigeration box provided on the outer wall of the reaction cylinder. A plurality of multi-stage semiconductor refrigeration chip groups are penetrated through the side wall of the refrigeration box. A blower is connected to the top of the refrigeration box. One end of the blower is connected to the serpentine tube. The other end of the serpentine tube is connected to the bottom of the refrigeration box.

[0009] Further, an inner heat dissipation plate is connected to the cold end of the multi-stage semiconductor refrigeration chip group, and an outer heat dissipation plate is connected to the hot end thereof. An electronic fan is provided on the outer heat dissipation plate. The controller is electrically connected to the semiconductor refrigeration chip, the electronic fan and the blower.

[0010] Further, diversion cavities are provided in both the top wall and the bottom wall of the refrigeration box. A plurality of diversion holes are provided on the opposite end walls of the two diversion cavities. The upper diversion cavity is connected to the air outlet of the blower. The lower diversion cavity is connected to the serpentine tube.

[0011] Further, the refrigeration box is provided on the side wall of the reaction cylinder through a bracket.

[0012] Further, the multi-stage semiconductor refrigeration chip group includes a plurality of semiconductor refrigeration chips with their cold ends and hot ends sequentially attached. The inner heat dissipation plate is provided on the cold end of the innermost semiconductor refrigeration chip. The outer heat dissipation plate is provided on the hot end of the outermost semiconductor refrigeration chip.

[0013] Further, the U-shaped manometer is made of a hard transparent material. A flowing liquid is provided in the U-shaped manometer.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] 1. Use a motor to drive the valve plate to close the feeding pipe, place calcium carbide on the valve plate, seal the top of the feeding pipe with a sealing cover, and use the motor to drive the valve plate to rotate so that the calcium carbide falls into the water. The top of the feeding pipe can be sealed before the reaction between calcium carbide and water, avoiding the leakage of air generated by the reaction, which is beneficial to improving the accuracy of the gas generation measurement.

[0016] 2. Before and after the reaction, use a temperature sensor to detect the temperature inside the reaction cylinder and transmit it to the controller. The controller controls the refrigeration device to deliver cold air to the serpentine pipe to cool the inside of the reaction cylinder, so that the temperature inside the reaction cylinder is the same before and after the reaction, which is beneficial to improving the accuracy of the calcium carbide gas generation measurement.

[0017] 3. After the reaction is completed and the temperature adjustment is completed, drive the piston to slide downward inside the reaction cylinder by rotating the screw until the liquid levels in the U-shaped manometer are parallel. Calculating the liquid level difference inside the reaction cylinder can obtain the gas generation of calcium carbide. Description of the Drawings

[0018] Figure 1 is the overall structural schematic diagram of the present invention;

[0019] Figure 2 is Figure 1 the enlarged view at A in (the arrow indicates the air flow direction);

[0020] In the figure: 1. Reaction cylinder; 2. Piston; 3. Measurement scale; 4. U-shaped manometer; 5. Serpentine pipe; 6. Liquid level; 7. Controller; 8. Temperature sensor; 9. Sealing cover; 10. Feeding pipe; 11. Valve plate; 12. Motor; 13. Handwheel; 14. Screw; 15. Slide bar; 16. Bracket; 17. Electric fan; 18. Outer heat dissipation plate; 19. Multistage semiconductor refrigeration chip group; 20. Inner heat dissipation plate; 21. Fan; 22. Shunt cavity; 23. Shunt hole; 24. Refrigeration box; 25. Valve. Detailed Embodiment

[0021] In order to better understand the technical content of the present invention, specific embodiments are provided below, and the present invention will be further described in conjunction with the drawings.

[0022] See Figures 1 to 2, the present utility model provides a calcium carbide gas generation measuring device, which includes a reaction cylinder 1, a piston 2, a U-shaped manometer 4, a serpentine tube 5 and a controller 7. The reaction cylinder 1 is made of a hard transparent material, such as glass. A measuring scale 3 is provided on the side wall of the reaction cylinder 1. A feeding pipe 10 and a valve 25 are provided at the top of the reaction cylinder 1. The top of the feeding pipe 10 is threadedly connected with a sealing cover 9. By rotating in different directions, the sealing cover 9 can be installed on or removed from the feeding pipe 10. A valve plate 11 is rotatably provided in the feeding pipe 10. The valve plate 11 is connected to a motor 12, and the motor 12 is fixedly provided on the outer wall of the feeding pipe 10. The piston 2 is slidably provided in the reaction cylinder 1. An air vent hole is provided at the bottom of the reaction cylinder 1 to avoid the accumulation of the space below the piston 2. The lower surface of the piston 2 is fixedly connected with a sliding rod 15. The sliding rod 15 slidably passes through the bottom of the reaction cylinder 1. A screw rod 14 is threadedly penetrated through the bottom of the reaction cylinder 1. The upper end of the screw rod 14 is pivotally connected to the lower surface of the piston 2. The lower end of the screw rod 14 is fixedly connected with a handwheel 13. Both the U-shaped manometer 4 and the serpentine tube 5 are provided in the reaction cylinder 1 and above the piston 2. A temperature sensor 8 is fixedly provided on the upper part of the U-shaped manometer 4. The temperature sensor 8 is located above the liquid level 6, mainly for detecting the temperature of the air in the space above the liquid level 6. The left end of the U-shaped manometer 4 fixedly penetrates through the upper part of the side wall of the reaction cylinder 1. The U-shaped manometer 4 is hermetically connected to the side wall of the reaction cylinder 1. Both sides of the serpentine tube 5 respectively penetrate through the side wall of the reaction cylinder 1 and are hermetically connected thereto. The serpentine tube 5 is connected to a refrigeration device, and the refrigeration device is fixedly provided on the outer wall of the reaction cylinder 1. The refrigeration device is used to convey cold air to the serpentine tube 5. The controller 7 is electrically connected to the refrigeration device and the temperature sensor 8. The controller 7 adopts an STM32 or 51 series single-chip microcomputer in the prior art;

[0023] When the present utility model measures the gas generation: after opening the valve 25, a quantitative amount of water is put into the space above the piston 2 in the reaction cylinder 1 through the valve 25. The liquid level 6 in the reaction cylinder 1 is recorded by using the measuring scale 3. The valve 25 is closed to prevent air from leaking out of the reaction cylinder 1 during the reaction. The motor 12 is used to drive the valve plate 11 to rotate to a horizontal state to close the feeding pipe 10. Calcium carbide is put on the valve plate 11, and the top of the feeding pipe 10 is sealed by using the sealing cover 9;

[0024] The controller 7 is used to control the refrigeration device to circulate and convey cold air to the serpentine tube 5 to cool the water and the air above the liquid level 6. During this process, the temperature sensor 8 is used to monitor the temperature of the air above the liquid level 6. When the temperature is lower than the preset temperature value (10 °C), the controller 7 controls the refrigeration device to stop conveying cold air to the serpentine tube 5;

[0025] The motor 12 is used to drive the valve plate 11 to rotate 90 degrees to make the calcium carbide fall into the water. At this time, since the top of the feeding pipe 10 is in a sealed state, the top of the feeding pipe 10 can be sealed before the reaction between the calcium carbide and the water, preventing the air generated by the reaction from leaking out of the top of the feeding pipe 10, which is beneficial to improving the accuracy of the gas generation measurement;

[0026] During the reaction of calcium carbide and water, heat is generated and acetylene is produced, increasing the air pressure in the upper space of the piston 2, causing the liquid level 6 on the side connected to the outside of the U-shaped manometer 4 to rise and the liquid level 6 on the side connected to the reaction cylinder 1 to fall;

[0027] During this process, the temperature sensor 8 is used to monitor the temperature of the air above the liquid level 6. When the temperature is higher than the preset temperature (10 °C), the controller 7 controls the refrigeration device to work and send cold air to the serpentine tube 5. When the temperature is lower than the preset temperature (10 °C), the controller 7 controls the refrigeration device to stop sending cold air to the serpentine tube 5;

[0028] After the reaction is completed and the temperature adjustment is completed, since the screw 14 is threadedly connected to the bottom of the reaction cylinder 1, the handwheel 13 is used to drive the screw 14 to rotate on the bottom wall of the reaction cylinder 1. By rotating the screw 14, the piston 2 is driven to slide downward in the reaction cylinder 1 until the liquid level 6 in the U-shaped manometer is parallel. The graduated scale 3 is used to record the liquid level 6 in the reaction cylinder 1 after the drop, and the gas generation amount of calcium carbide can be obtained.

[0029] Preferably, the refrigeration device includes a refrigeration box 24 fixedly arranged on the outer wall of the reaction cylinder 1. A plurality of multi-stage semiconductor refrigeration sheet groups 19 are penetrated through the side wall of the refrigeration box 24. The top of the refrigeration box 24 is connected with a blower 21. The blower 21 is connected to the upper end of the serpentine tube 5, and the lower end of the serpentine tube 5 is connected to the bottom of the refrigeration box 24;

[0030] The blower 21 is used to extract the air in the serpentine tube 5 and then convey it to the top in the refrigeration box 24. The air is cooled after flowing through the cold end of the multi-stage semiconductor refrigeration sheet group 19, and the cooled air is conveyed back to the lower end of the serpentine tube 5. Such a cycle can cool the water and air in the reaction cylinder 1, which is beneficial to improving the overall cooling effect.

[0031] Preferably, an inner heat dissipation plate 20 is connected to the cold end of the multi-stage semiconductor refrigeration sheet group 19 to improve the cold conduction effect. An outer heat dissipation plate 18 is connected to the hot end of the multi-stage semiconductor refrigeration sheet group 19 to improve the heat conduction effect. An electronic fan 17 is arranged on the outer heat dissipation plate 18. The electronic fan 17 is used to blow air to the outer heat dissipation plate 18, so that the heat at the hot end is quickly dissipated into the air. The controller 7 is electrically connected to the semiconductor refrigeration sheet, the electronic fan 17 and the blower 21. When refrigerating, the controller 7 is used to control the blower 21, the electronic fan 17 and the blower 21 to start. When not refrigerating, it controls the blower 21, the electronic fan 17 and the blower 21 to stop.

[0032] Preferably, a flow dividing cavity 22 is provided inside both the top wall and the bottom wall of the refrigeration box 24. A plurality of flow dividing holes 23 are provided on the opposite end walls of the two flow dividing cavities 22. The upper flow dividing cavity 22 is connected to the air outlet of the blower 21, and the lower flow dividing cavity 22 is connected to the lower end of the serpentine tube 5. After the blower 21 conveys air to the upper flow dividing cavity 22, the air is conveyed downward into the refrigeration box 24 through the plurality of flow dividing holes 23. After the air flows through the inner heat dissipation plate 20 for heat exchange, it flows into the lower flow dividing cavity 22 through the plurality of lower flow dividing holes 23, and then is conveyed back into the serpentine tube 5 by the lower flow dividing cavity 22.

[0033] Preferably, the upper and lower sides of the side wall of the refrigeration box 24 are fixedly arranged on the side wall of the reaction cylinder 1 through brackets 16.

[0034] Preferably, the multi-stage semiconductor refrigeration chip group 19 includes four semiconductor refrigeration chips with their cold ends and hot ends attached in sequence. The inner heat dissipation plate 20 is arranged on the cold end of the innermost semiconductor refrigeration chip, and the outer heat dissipation plate 18 is arranged on the hot end of the outermost semiconductor refrigeration chip. By connecting the four semiconductor refrigeration chips in series, a lower refrigeration temperature can be provided. The setting method of the four-stage semiconductor refrigeration chip is prior art and will not be elaborated here.

[0035] Preferably, the U-shaped manometer is made of a hard transparent material such as glass, and there is a flowing liquid inside the U-shaped manometer.

[0036] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A device for measuring the gas generation of calcium carbide, characterized in that: It comprises a reaction cylinder, a piston, a U-shaped pressure gauge, a serpentine tube and a controller. The reaction cylinder is made of a hard transparent material. A metering scale is arranged on the side wall of the reaction cylinder. A feeding tube and a valve are arranged on the top of the reaction cylinder. A sealing cap is threadedly connected to the top of the feeding tube. A valve plate is rotatably arranged in the feeding tube. The valve plate is connected to a motor arranged on the outer wall of the feeding tube. The piston is slidably arranged in the reaction cylinder. A sliding rod is connected to the lower surface of the piston. The sliding rod is slidably penetrated at the bottom of the reaction cylinder. A screw is threadedly penetrated at the bottom of the reaction cylinder. The upper and lower ends of the screw are respectively transferred to the lower surface of the piston and connected to a handwheel. The U-shaped pressure gauge and the serpentine tube are both arranged in the reaction cylinder and located above the piston. A temperature sensor is arranged on the upper part of the U-shaped pressure gauge, one end of which penetrates the upper part of the side wall of the reaction cylinder. Both sides of the serpentine tube are respectively penetrated on the side walls of the reaction cylinder. The serpentine tube is connected to a refrigeration device arranged on the outer wall of the reaction cylinder. The refrigeration device is used to transport cold air to the serpentine tube. The controller is electrically connected to the refrigeration device and the temperature sensor.

2. A device for measuring the gas generation of calcium carbide according to claim 1, characterized in that: The refrigeration device includes a refrigeration box arranged on the outer wall of the reaction cylinder, a plurality of multi-stage semiconductor refrigeration plate groups are penetrated on the side wall of the refrigeration box, a fan is connected to the top of the refrigeration box, the fan is connected to one end of the serpentine tube, and the other end of the serpentine tube is connected to the bottom of the refrigeration box.

3. A device for measuring the gas generation of calcium carbide according to claim 2, characterized in that: The cold end of the multi-stage semiconductor refrigeration plate group is connected to an inner heat sink, and the hot end is connected to an outer heat sink. An electronic fan is arranged on the outer heat sink. The controller is electrically connected to the semiconductor refrigeration plate, the electronic fan and the blower.

4. A device for measuring the amount of gas generated by calcium carbide according to claim 2 or 3, characterized in that: The top wall and the bottom wall of the refrigeration box are both provided with a diversion cavity, and the opposite end walls of the two diversion cavities are both provided with a plurality of diversion holes. The upper diversion cavity is connected to the exhaust port of the fan, and the lower diversion cavity is connected to the serpentine pipe.

5. A device for measuring the gas generation amount of calcium carbide according to claim 2 or 3, characterized in that: The refrigeration box is arranged on the side wall of the reaction tube through a bracket.

6. A device for measuring the gas generation of calcium carbide according to claim 3, characterized in that: The multi-stage semiconductor refrigeration plate group includes a plurality of semiconductor refrigeration plates with cold ends and hot ends sequentially attached, the inner heat dissipation plate is arranged on the cold end of the innermost semiconductor refrigeration plate, and the outer heat dissipation plate is arranged on the hot end of the outermost semiconductor refrigeration plate.

7. A device for measuring the gas generation of calcium carbide according to claim 1, characterized in that: The U-shaped pressure gauge is made of a hard transparent material, and a flow liquid is arranged inside the U-shaped pressure gauge.

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