Pressure transmitter calibration device

Abstract

The utility model provides a pressure transmitter proofreading device, which relates to the technical field of proofreading equipment and comprises a proofreading device body, a gas circulating pump is arranged at the top of the proofreading device body, and the input end and the output end of the gas circulating pump are both connected with first connecting pipes. The input end of the gas circulating pump is connected with a first valve through a first connecting pipe, one side of the first valve is connected with a gas storage tank, the output end of the gas circulating pump is connected with a second valve through a first connecting pipe, and one end of the second valve is connected with a gas tank. According to the device, the first valve is opened, meanwhile, nitrogen stored in the gas storage box can be pumped out through the gas circulating pump and conveyed into the gas tank through the first connecting pipe to be stored again, the gas tank can be sealed through the second valve, the nitrogen stored in the gas tank is prevented from leaking, and therefore recovery of the nitrogen for proofreading is achieved; therefore, the nitrogen consumption is reduced, and the calibration work cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of proofreading equipment, in particular to a pressure transmitter proofreading device. Background Art

[0002] A pressure transmitter is a device that converts pressure into a pneumatic signal or an electric signal for control and remote transmission. It can convert physical pressure parameters such as gas and liquid sensed by a pressure measuring element sensor into a standard electric signal to supply secondary instruments such as indicating alarm instruments, recorders, and regulators for measurement, indication, and process adjustment.

[0003] When the existing pressure transmitter proofreading device is in use, nitrogen is generally introduced into the pressure transmitter for proofreading. Because nitrogen has stable chemical properties and is not easy to react with other substances, the proofreading data can be made more accurate. However, the proofreading device will directly discharge the used nitrogen and cannot recycle it, resulting in a large consumption of nitrogen in actual use and an increase in proofreading costs. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problem in the prior art that nitrogen cannot be recycled, resulting in a large consumption of nitrogen in actual use and an increase in proofreading costs, and to propose a pressure transmitter proofreading device.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: A pressure transmitter proofreading device includes a proofreading device body. A gas circulation pump is arranged at the top of the proofreading device body. Both the input end and the output end of the gas circulation pump are connected with a first connecting pipe. The input end of the gas circulation pump is connected with a first valve through the first connecting pipe. One side of the first valve is connected with a gas storage tank. The output end of the gas circulation pump is connected with a second valve through the first connecting pipe. One end of the second valve is connected with a gas tank.

[0006] Preferably, a first sealing valve is arranged at the top of the gas storage tank. The top of the first sealing valve is connected with a first three-way pipe. Both ends of the first three-way pipe are connected with a second connecting pipe. One end of each of the two second connecting pipes is connected with a second three-way valve. The tops of the two second three-way valves are both connected with a pressure transmitter body.

[0007] Preferably, a second sealing valve is arranged on the outer side of the gas tank. One end of the second sealing valve is connected with an air outlet pipe.

[0008] Preferably, one end of the air outlet pipe is connected with a pressure regulating valve. One end of the pressure regulating valve is connected with a conveying pipe. One end of the conveying pipe is connected with the gas storage tank.

[0009] Preferably, a pressure gauge is installed on the top of the first three-way pipe, and the pressure gauge is arranged between the two pressure transmitter bodies.

[0010] Preferably, an exhaust valve is connected to one end of a single second three-way valve, and a sealing cover is arranged at one end of the other second three-way valve.

[0011] Preferably, two supporting foot frames are arranged at the bottom of the gas tank, and the gas tank is arranged above the calibration device body.

[0012] Compared with the prior art, the advantages and positive effects of the present utility model are as follows.

[0013] 1. In the present utility model, by opening the first valve, the nitrogen gas remaining in the gas storage tank can be pumped out by using the gas circulation pump and transported to the inside of the gas tank through the first connecting pipe for storage again. The gas tank can be sealed through the second valve to prevent the nitrogen gas stored inside the gas tank from leaking, thereby realizing the recovery and recycling of the nitrogen gas for calibration, reducing the consumption of nitrogen gas, and saving the cost of calibration work.

[0014] 2. In the present utility model, by opening the first sealing valve, the nitrogen gas inside the gas storage tank is transported to the second three-way valve through the first three-way pipe and the second connecting pipe, thereby realizing the calibration of the two pressure transmitter bodies simultaneously under the same air pressure, improving the efficiency of the calibration work, and the data of the two pressure transmitter bodies can be compared with each other, effectively improving the calibration accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structural schematic diagram of a pressure transmitter calibration device proposed by the present utility model;

[0016] Figure 2 is a partial structural schematic diagram of a pressure transmitter calibration device proposed by the present utility model;

[0017] Figure 3 is a structural schematic diagram of a pressure transmitter body of a pressure transmitter calibration device proposed by the present utility model;

[0018] Figure 4 is a structural schematic diagram of a gas circulation pump of a pressure transmitter calibration device proposed by the present utility model.

[0019] Legend: 1. Calibration device body; 2. Gas storage tank; 3. First valve; 4. Gas circulation pump; 5. First connecting pipe; 6. Second valve; 7. Gas cylinder; 8. First sealing valve; 9. First three-way pipe; 10. Second connecting pipe; 11. Second three-way valve; 12. Pressure transmitter body; 13. Sealing cover; 14. Exhaust valve; 15. Pressure gauge; 16. Supporting footrest; 17. Second sealing valve; 18. Outlet pipe; 19. Pressure regulating valve; 20. Delivery pipe. Detailed implementation mode

[0020] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described below with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0021] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the present invention is not limited by the specific embodiments disclosed in the following specification.

[0022] Embodiment 1

[0023] As Figures 1-4 shown, the present invention provides a technical solution: a pressure transmitter calibration device, including a calibration device body 1, a gas circulation pump 4 is arranged on the top of the calibration device body 1, both the input end and the output end of the gas circulation pump 4 are connected with a first connecting pipe 5, the input end of the gas circulation pump 4 is connected with a first valve 3 through the first connecting pipe 5, a gas storage tank 2 is connected to one side of the first valve 3, and the output end of the gas circulation pump 4 is connected with a second valve 6 through the first connecting pipe 5, and one end of the second valve 6 is connected with a gas cylinder 7.

[0024] In this embodiment, by opening the first valve 3 and simultaneously using the gas circulation pump 4, the nitrogen stored in the gas storage tank 2 can be pumped out and transported to the inside of the gas cylinder 7 through the first connecting pipe 5 for storage again. The gas cylinder 7 can be sealed through the second valve 6 to prevent the nitrogen stored inside the gas cylinder 7 from leaking, so as to realize the recovery and recycling of the nitrogen for calibration, thereby reducing the nitrogen consumption and saving the calibration work cost.

[0025] Embodiment 2

[0026] As Figures 1-4As shown in the figure, a first sealing valve 8 is provided at the top of the gas storage tank 2. The top of the first sealing valve 8 is connected to a first three-way pipe 9. Both ends of the first three-way pipe 9 are connected to second connecting pipes 10. One end of each of the two second connecting pipes 10 is connected to a second three-way valve 11. The tops of the two second three-way valves 11 are both connected to a pressure transmitter body 12. A second sealing valve 17 is provided on the outer side of the gas tank 7. One end of the second sealing valve 17 is connected to an air outlet pipe 18. One end of the air outlet pipe 18 is connected to a pressure regulating valve 19. One end of the pressure regulating valve 19 is connected to a delivery pipe 20. One end of the delivery pipe 20 is connected to the gas storage tank 2. A pressure gauge 15 is installed on the top of the first three-way pipe 9. The pressure gauge 15 is arranged between the two pressure transmitter bodies 12. One end of a single second three-way valve 11 is connected to an exhaust valve 14. The other end of the second three-way valve 11 is provided with a sealing cover 13. Two supporting feet 16 are provided at the bottom of the gas tank 7. The gas tank 7 is arranged above the calibration device body 1.

[0027] In this embodiment, by opening the first sealing valve 8, the nitrogen gas inside the gas storage tank 2 is transported to the second three-way valve 11 through the first three-way pipe 9 and the second connecting pipes 10, so as to calibrate the two pressure transmitter bodies 12 simultaneously under the same air pressure, thereby improving the efficiency of the calibration work. At the same time, the data of the two pressure transmitter bodies 12 can be compared with each other, so as to effectively improve the calibration accuracy. By opening the second sealing valve 17, the nitrogen gas inside the gas tank 7 can be transported into the gas storage tank 2 through the air outlet pipe 18 and the delivery pipe 20. At the same time, the pressure regulating valve 19 can be used to control and regulate the air pressure, so as to calibrate the pressure transmitter body 12 under different air pressures, thereby reducing the working difficulty and improving the calibration accuracy. The pressure gauge 15 can display the air pressure data during the calibration process. By comparing the air pressure data displayed by the pressure gauge 15 with that displayed by the pressure transmitter body 12, the calibration of the pressure transmitter body 12 can be achieved. The sealing cover 13 can prevent the nitrogen gas from leaking outside during the calibration process, thereby improving the calibration accuracy and enhancing the safety of the device during use. The exhaust valve 14 can be used to discharge a small part of the residual nitrogen gas in the first three-way pipe 9 and the second three-way valve 11. The supporting feet 16 can support the gas tank 7 and fix it on the calibration device body 1, thereby improving the stability.

[0028] Working principle of this embodiment: When in use, first install the two pressure transmitter bodies 12 on the two second three-way valves 11 respectively. Then open the second sealing valve 17 so that the nitrogen gas stored inside the gas tank 7 flows into the gas storage tank 2 through the air outlet pipe 18 and the delivery pipe 20. Next, open the first sealing valve 8 so that the nitrogen gas in the gas storage tank 2 enters the second three-way valve 11 through the first three-way pipe 9 and the second connecting pipe 10 to calibrate the pressure transmitter bodies 12 respectively installed on the two second three-way valves 11. During this process, the air pressure can be adjusted through the pressure regulating valve 19, so as to calibrate the pressure transmitter body 12 under different air pressures. Observe the data displayed on the pressure gauge 15 and the pressure transmitter body 12 during the calibration process, and compare the data. If the data is the same, the pressure transmitter body 12 is qualified. After the calibration is completed, close the first sealing valve 8, and at the same time, through the exhaust valve 14, discharge the small amount of remaining nitrogen gas in the second connecting pipe 10 and the second three-way valve 11. Then close the second sealing valve 17, and synchronously open the first valve 3 to start the gas circulation pump 4. The gas circulation pump 4 pumps out the nitrogen gas remaining inside the gas storage tank 2 and transports it to the gas tank 7 through the first connecting pipe 5, so as to recycle the nitrogen gas. After the recycling is completed, close the second valve 6 to completely seal the gas tank 7, thus completing the use of the pressure transmitter calibration device.

[0029] The above is only a preferred embodiment of the present invention, and it is not intended to limit the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A pressure transmitter calibration device, comprising a calibration device body (1), characterized in that: A gas circulation pump (4) is provided at the top of the proofreading device body (1). Both the input end and the output end of the gas circulation pump (4) are connected with a first connecting pipe (5). The input end of the gas circulation pump (4) is connected with a first valve (3) through the first connecting pipe (5). One side of the first valve (3) is connected with a gas storage tank (2). The output end of the gas circulation pump (4) is connected with a second valve (6) through the first connecting pipe (5). One end of the second valve (6) is connected with a gas tank (7).

2. The pressure transmitter calibration device according to claim 1, characterized in that: A first sealing valve (8) is provided at the top of the gas storage tank (2). The top of the first sealing valve (8) is connected with a first three-way pipe (9). Both ends of the first three-way pipe (9) are connected with a second connecting pipe (10). One end of each of the two second connecting pipes (10) is connected with a second three-way valve (11). The top of each of the two second three-way valves (11) is connected with a pressure transmitter body (12).

3. The pressure transmitter calibration device according to claim 1, characterized in that: A second sealing valve (17) is provided on the outer side of the gas tank (7). One end of the second sealing valve (17) is connected with an air outlet pipe (18).

4. The pressure transmitter calibration device according to claim 3, characterized in that: One end of the air outlet pipe (18) is connected with a pressure regulating valve (19). One end of the pressure regulating valve (19) is connected with a conveying pipe (20). One end of the conveying pipe (20) is connected with the gas storage tank (2).

5. The pressure transmitter calibration device according to claim 2, wherein: A pressure gauge (15) is installed at the top of the first three-way pipe (9). The pressure gauge (15) is arranged between the two pressure transmitter bodies (12).

6. The pressure transmitter calibration device according to claim 2, characterized in that: One end of a single second three-way valve (11) is connected with an exhaust valve (14). One end of the other second three-way valve (11) is provided with a sealing cover (13).

7. The pressure transmitter calibration device according to claim 1, wherein: Two supporting feet (16) are provided at the bottom of the gas tank (7). The gas tank (7) is arranged above the proofreading device body (1).

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