Pressure testing device and pressure testing system for gas drainage multi-parameter sensor

Abstract

The utility model relates to the technical field of coal mine safety, in particular to a pressure testing device and a pressure testing system for a gas drainage multi-parameter sensor, which comprise a sealing structural body and a pressure controller connected with the sealing structural body, the pressure controller is communicated with the inner cavity of the hollow stand column. The device can be compatible with plug-in gas drainage multi-parameter sensors of all manufacturers, the design of the direct-current micro diaphragm air pump is adopted to replace a traditional manual pump, the labor intensity is relieved, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of coal mine safety technology, specifically to a gas drainage multi-parameter sensor pressure testing device and a pressure testing system for the gas drainage multi-parameter sensor pressure testing device. Background Technology

[0002] To improve the safety level of coal mines, relevant manufacturers have developed three-parameter gas drainage multi-parameter sensors (monitoring: temperature, pressure, flow rate) or five-parameter gas drainage multi-parameter sensors (monitoring: temperature, pressure, flow rate, methane, carbon monoxide).

[0003] The traditional method for testing gas pressure gauges involves mounting the gauge under test on a test base via a standard threaded interface. The test base is designed with two interfaces that connect to a standard pressure gauge (high precision) and a hand pump via air tubes. The hand pump generates a standard positive or negative pressure, and the readings of the pressure gauge under test and the standard pressure gauge (high precision) are read and the error is compared.

[0004] Currently, gas drainage multi-parameter sensors mainly adopt an insertion structure design. This structure design is lightweight and flexible. However, the differences in the shape of the pressure tap and the insertion structure of various types of gas drainage multi-parameter sensors make it inconvenient to detect the accuracy of the pressure value of the gas drainage multi-parameter sensors. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a multi-parameter sensor pressure testing device and pressure testing system for gas extraction, mainly solving the following problems:

[0006] (1) The traditional method of pressure verification of gas extraction multi-parameter sensors has the problem that it cannot be installed with traditional threaded test seats;

[0007] (2) Designing a specific dedicated test seat can solve the sealing problem of multi-parameter gas extraction sensor installation, but due to the large internal volume of the specific dedicated test seat, the manual pump has the problem of not being able to be adjusted.

[0008] (3) The specific dedicated test fixture also needs to be compatible with various types of insertable gas extraction multi-parameter sensors and enable rapid installation.

[0009] This utility model is achieved through the following technical solution:

[0010] A gas extraction multi-parameter sensor pressure testing device includes a sealed structure and a pressure controller connected to the sealed structure.

[0011] The sealing structure includes a hollow column, an interface adapter, and a sealing connection assembly. The interface adapter covers the top of the hollow column. The sealing connection assembly includes a sealing body, a sealing element, a sealing pressure ring, and a locking knob. The sealing body is fixed to the top of the interface adapter. A first sealing ring is provided at the connection between the sealing body and the interface adapter. The sealing body and the interface adapter have a sealing channel that allows the gas extraction multi-parameter sensor to pass through and communicate with the inner cavity of the hollow column. The sealing element is sleeved between the inner wall of the sealing body and the outer wall of the gas extraction multi-parameter sensor. The sealing pressure ring is sleeved on the outer wall of the gas extraction multi-parameter sensor and is located at the top of the sealing element. The locking knob is sleeved on the outside of the sealing body and the sealing pressure ring, and the locking knob is threadedly connected to the sealing body. The locking knob can press the sealing pressure ring tightly.

[0012] The pressure controller is connected to the inner cavity of the hollow column.

[0013] To facilitate the assembly and disassembly of the interface adapter and the hollow column, the interface adapter and the hollow column are fixed together by a first locking member, which includes a first locking clamp and a first locking rod connected to the first locking clamp.

[0014] To ensure a tight seal when the interface adapter is connected to the hollow column, a second sealing ring is provided between the bottom surface of the interface adapter and the top surface of the hollow column.

[0015] To facilitate the assembly and disassembly of the interface adapter and the sealing body, the interface adapter and the sealing body are fixed together by a second locking member, which includes a second locking clamp and a second locking rod connected to the second locking clamp.

[0016] This utility model also provides a pressure testing system for the gas extraction multi-parameter sensor pressure testing device as described above, including a DC miniature diaphragm air pump, a solenoid valve group, a flow regulator, a pressure sensor, and a programmable controller. The programmable controller is connected to the DC miniature diaphragm air pump, the solenoid valve group, and the pressure sensor. The DC miniature diaphragm air pump and the flow regulator are connected to the solenoid valve group.

[0017] Furthermore, the DC miniature diaphragm air pump includes a first DC miniature diaphragm air pump and a second DC miniature diaphragm air pump. The solenoid valve group includes a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, and a fifth solenoid valve. The first DC miniature diaphragm air pump is connected to the fifth solenoid valve, the second DC miniature diaphragm air pump is connected to the fourth solenoid valve, the first solenoid valve is connected to a pressure relief pipe, the second solenoid valve is connected to a flow regulator, and the third solenoid valve and the flow regulator are connected to the injection and extraction pipes. The flow regulator is used to manually adjust the gas flow rate of this channel to a low flow rate, thereby controlling the injection and extraction speed.

[0018] The beneficial effects of this utility model are:

[0019] (1) The gas drainage multi-parameter sensor pressure testing device can produce standard pressures from -80 kPa to 150 kPa. Due to the adoption of the automatic switching function between large and small flow rates, the pressure regulation accuracy can reach 0.01 kPa, which meets the requirements of gas drainage multi-parameter sensor pressure testing.

[0020] (2) The device can be designed with different specifications of interface adapters and can be compatible with all manufacturers' plug-in gas extraction multi-parameter sensors.

[0021] (3) The design of the DC micro diaphragm air pump replaces the traditional hand pump, which reduces labor intensity and improves work efficiency. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the gas extraction multi-parameter sensor pressure testing device of this utility model.

[0023] Figure 2 This is a cross-sectional view of the interface adapter and sealing connection assembly of this utility model.

[0024] Figure 3 This is a schematic diagram of the pressure testing system of this utility model. Detailed Implementation

[0025] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of the present invention.

[0026] Example 1:

[0027] like Figure 1 , Figure 2 The gas extraction multi-parameter sensor pressure testing device shown includes a sealed structure and a pressure controller 1 connected to the sealed structure.

[0028] Specifically, the sealing structure includes a hollow column 2, an interface adapter 9, and a sealing connection assembly. The hollow column 2 is vertically fixed to the chassis 3. The top and bottom of the hollow column 2 are respectively provided with an air intake port and a spare port (which can be connected to a high-precision pressure gauge as a standard gauge or a manual valve for rapid pressure relief). The pressure controller 1 is connected to the inner cavity of the hollow column 2. The interface adapter 9 covers the top of the hollow column 2, and the interface adapter 9 is fixed to the hollow column 2 by a first locking member. The first locking member includes a... A locking clamp 5 and a first locking rod 6 connected to the first locking clamp 5 are provided. A second sealing ring 15 is provided between the bottom end face of the interface adapter 9 and the top end face of the hollow column 2 to ensure the sealing of the interface adapter 9 and the hollow column 2 at the joint. The sealing connection assembly includes a sealing body 10, a sealing element 12, a sealing pressure ring 13 and a locking knob 11. The sealing body 10 is fixed to the center of the interface adapter 9 and the top end of the interface adapter 9. The sealing body 10 and the interface adapter 9 are connected. The connectors 9 are fixed together by a second locking member, which includes a second locking clamp 7 and a second locking rod 8 connected to the second locking clamp 7. A first sealing ring 14 is provided at the connection between the top of the sealing body 10 and the interface adapter 9. The first sealing ring 14 can seal the gap between the sealing body 10 and the interface adapter 9. The sealing body 10 and the interface adapter 9 have a sealing channel that allows the gas extraction multi-parameter sensor 4 to pass through and communicate with the inner cavity of the hollow column 2. The sealing member 1 The sealing ring 13 is sleeved between the inner wall of the sealing body 10 and the outer wall of the gas extraction multi-parameter sensor 4. The sealing pressure ring 13 is sleeved on the outer wall of the gas extraction multi-parameter sensor 4 and set at the top of the sealing element 12. The locking knob 11 is sleeved on the outer side of the sealing body 10 and the sealing pressure ring 13, and the locking knob 11 is threadedly connected to the outer wall of the sealing body 10. The locking knob 11 can press the sealing pressure ring 13 tightly, so as to achieve a tight fit between the sealing body 10, the sealing element 12, the sealing pressure ring 13, and the gas extraction multi-parameter sensor 4.

[0029] Specifically, the pressure controller 1 includes a power supply module, a DC micro diaphragm air pump, a solenoid valve group, a flow regulator, a high-precision pressure sensor, a programmable controller, and a touch screen. The pressure controller's program mainly includes: 1) acquisition, conversion, and filtering of pressure monitoring data; 2) the touch screen mainly sets the working interface and parameter setting interface. The working interface includes: a pressure monitoring value display box, a pressure setting (target) value display box, a manual / automatic mode selection key, a start / stop operation key (automatic mode display), a positive / negative pressure selection key (manual mode display), and a manual run key (manual mode display); the parameter setting interface includes: a manual zeroing key and a sensitivity setting box; 3) in manual mode, positive and negative pressure (i.e., air injection and air extraction) can be selected using the positive / negative pressure selection key, and the manual run key can be pressed for jogging operation. Releasing the key stops the operation. In automatic mode, the device automatically determines the logical relationship between the pressure setpoint and the current pressure monitoring value, and automatically controls the corresponding solenoid valve to switch between air injection and air extraction. At the same time, the automatic mode has a function to stop the machine at any time; 4) In automatic mode, it has an automatic switching function between large and small flow rates. When the pressure monitoring value is close to the pressure setpoint, it automatically enters the small flow (trickle) mode. The start value of the small flow (trickle) mode (the difference between the pressure monitoring value and the pressure setpoint) can be set and modified in the parameter setting interface (sensitivity setting box); 5) The zero calibration of the high-precision pressure sensor can be performed through the touch screen parameter setting interface to correct the zero point of the pressure value.

[0030] During installation, first install the interface adapter 9, the second sealing ring 15, and the first locking clamp 5 on the top of the hollow column 2. Then, install the first sealing ring 14, the sealing body 10, the sealing element 12, the sealing pressure ring 13, the locking knob 11, and the second locking clamp 7 on the outside of the gas extraction multi-parameter sensor 4. Then, insert the gas extraction multi-parameter sensor 4 into the hollow column 2. Subsequently, lock the first locking rod 6, the second locking rod 8, and the locking knob 11 in sequence. Finally, connect the pressure controller 1 to the hollow column 2 to complete the assembly.

[0031] Example 2:

[0032] This embodiment provides a pressure testing system for use with the aforementioned gas extraction multi-parameter sensor pressure testing device, such as... Figure 3As shown, the system includes a DC miniature diaphragm air pump, a solenoid valve assembly, a flow regulator, a pressure sensor, a programmable controller, and a touch screen. The DC miniature diaphragm air pump includes a first DC miniature diaphragm air pump and a second DC miniature diaphragm air pump. The solenoid valve assembly includes a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, and a fifth solenoid valve. The first DC miniature diaphragm air pump is connected to the fifth solenoid valve, the second DC miniature diaphragm air pump is connected to the fourth solenoid valve, the first solenoid valve is connected to a pressure relief pipe, the second solenoid valve is connected to the flow regulator, and the third solenoid valve and the flow regulator are connected to injection and extraction pipes. The programmable controller is connected to the first DC miniature diaphragm air pump, the second DC miniature diaphragm air pump, the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve, and the touch screen. The programmable controller uses an S7-1200 PLC module to realize functions such as signal acquisition, data processing, PN communication, and logic control.

[0033] This stress testing system includes two control modes:

[0034] Automatic control mode:

[0035] Input the pressure setpoint – Press the start button – Read the (P) pressure monitoring value to determine whether to execute the suction or injection mode and the flow mode (when the current pressure monitoring value is greater than the pressure setpoint, execute the suction task and open the first DC micro diaphragm air pump, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve; when the current pressure monitoring value is less than the pressure setpoint, execute the injection task and open the second DC micro diaphragm air pump, the second solenoid valve, the third solenoid valve, and the fifth solenoid valve); if the differential pressure between the pressure monitoring value and the pressure setpoint is greater than 2 kPa (adjustable), execute the high flow mode, and both the second and third solenoid valves are open; if the differential pressure between the pressure monitoring value and the pressure setpoint is less than 2 kPa (adjustable), execute the low flow mode, keep the second solenoid valve open, close the third solenoid valve, and read the (P) pressure monitoring value in real time to determine whether the target value has been reached and close the DC micro diaphragm air pump and related solenoid valves.

[0036] Manual control function:

[0037] Display the "Inject Air" button on the touchscreen and turn on the second DC micro diaphragm air pump, the second solenoid valve, the third solenoid valve, and the fifth solenoid valve;

[0038] Display the "Pull Air" button on the touch screen to open the first DC micro diaphragm air pump, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve;

[0039] Display the "Relieve Pressure" button on the touchscreen and open the first solenoid valve.

[0040] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "between", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0041] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A gas extraction multi-parameter sensor pressure testing device, characterized in that: Includes a sealing structure and a pressure controller connected to the sealing structure; The sealing structure includes a hollow column, an interface adapter, and a sealing connection assembly. The interface adapter covers the top of the hollow column. The sealing connection assembly includes a sealing body, a sealing element, a sealing pressure ring, and a locking knob. The sealing body is fixed to the top of the interface adapter. A first sealing ring is provided at the connection between the sealing body and the top of the interface adapter. The sealing body and the interface adapter have a sealing channel that allows the gas extraction multi-parameter sensor to pass through and communicate with the inner cavity of the hollow column. The sealing element is sleeved between the inner wall of the sealing body and the outer wall of the gas extraction multi-parameter sensor. The sealing pressure ring is sleeved on the outer wall of the gas extraction multi-parameter sensor and is located at the top of the sealing element. The locking knob is sleeved outside the sealing body and the sealing pressure ring, and the locking knob is threadedly connected to the sealing body. The locking knob can press the sealing element tightly. The pressure controller is connected to the inner cavity of the hollow column.

2. The gas extraction multi-parameter sensor pressure testing device according to claim 1, characterized in that: The interface adapter is fixed to the hollow column by a first locking member, which includes a first locking clamp and a first locking rod connected to the first locking clamp.

3. The gas extraction multi-parameter sensor pressure testing device according to claim 2, characterized in that: A second sealing ring is provided between the bottom end face of the interface adapter and the top end face of the hollow column.

4. The gas extraction multi-parameter sensor pressure testing device according to claim 1, characterized in that: The interface adapter is fixed to the sealing body by a second locking member, which includes a second locking clamp and a second locking rod connected to the second locking clamp.

5. A pressure testing system, used in the gas extraction multi-parameter sensor pressure testing device as described in any one of claims 1-4, characterized in that: It includes a DC miniature diaphragm air pump, a solenoid valve assembly, a flow regulator, a pressure sensor, and a programmable controller. The programmable controller is connected to the DC miniature diaphragm air pump, the solenoid valve assembly, and the pressure sensor. The DC miniature diaphragm air pump and the flow regulator are connected to the solenoid valve assembly.

6. The pressure testing system according to claim 5, characterized in that: The DC miniature diaphragm air pump includes a first DC miniature diaphragm air pump and a second DC miniature diaphragm air pump. The solenoid valve group includes a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, and a fifth solenoid valve. The first DC miniature diaphragm air pump is connected to the fifth solenoid valve, the second DC miniature diaphragm air pump is connected to the fourth solenoid valve, the first solenoid valve is connected to the pressure relief pipe, the second solenoid valve is connected to the flow regulator, and the third solenoid valve and the flow regulator are connected to the injection and extraction pipes.

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