gas relay

Abstract

The present application relates to gas relay sampling, detection technical field, particularly to a kind of gas relay, including main body, transmission bin, sampling tube and first air pump, transmission bin has transmission cavity, main body is equipped with first communication port and chamber, first communication port is communicated chamber and transmission cavity, first communication port is hinged with the first valve plate capable of covering first communication port, first valve plate is equipped with first reset unit, transmission bin is equipped with first push rod, first push rod is towards first valve plate setting, sampling tube two ends are respectively detachably installed in first air pump and transmission bin, sampling tube can be communicated first air pump and transmission bin.It has beneficial effect in that: the present application is conducive to realizing the gas existing in the internal space of gas relay in closed state can be sampled, detection function, for staff in the safe maintenance work of transformer carries out and brings convenience.

Description

Technical Field

[0001] This invention relates to the field of gas relay sampling and detection technology, and in particular to a gas relay. Background Technology

[0002] A gas relay is a protective device used in transformers. It is installed in the pipeline between the transformer's oil conservator and oil tank. When an internal fault in the transformer causes the oil to decompose and produce gas or causes an oil surge, the gas relay contacts will activate, connecting the designated control circuit and promptly issuing an alarm signal or activating protective components to automatically disconnect the transformer.

[0003] Currently, although the gas relays in use can monitor the gas produced by the transformer in real time and issue an alarm when gas accumulates in the pipeline, they do not have the function of sampling and analyzing the gas in the pipeline. This makes it impossible for staff to sample and analyze the gas in the pipeline in a timely and quick manner when gas accumulates in the gas relay, and makes it impossible for staff to take timely adaptive measures to deal with the gas in the pipeline, which may lead to a series of accident risks. Summary of the Invention

[0004] The technical problem to be solved by this invention is the difficulty in sampling gas inside a gas relay.

[0005] To address the aforementioned technical problems, this invention provides a gas relay comprising a main body, a conductive chamber, a sampling tube, and a first air pump. The conductive chamber has a conductive cavity. The main body has a first connecting port and a cavity. The first connecting port connects the cavity and the conductive chamber. A first valve plate is hinged to the first connecting port and covers it. The first valve plate has a first reset unit. The conductive chamber has a first push rod facing the first valve plate. Both ends of the sampling tube are detachably mounted to the first air pump and the conductive chamber, respectively. The sampling tube can connect the first air pump and the conductive chamber.

[0006] The above technical solution also includes a second air pump. The conduction chamber has a second connecting port, which connects the second air pump and the conduction chamber. The second connecting port is hinged to a second valve plate that can cover the second connecting port. The second valve plate is provided with a second reset unit.

[0007] In the above technical solution, the conduction chamber is provided with a third connecting port, the third connecting port connects the sampling tube and the conduction cavity, the third connecting port is hinged with a third valve plate that can cover the third connecting port, and the third valve plate is provided with a third reset unit.

[0008] The above technical solution also includes a balance column. The main body has a fourth communication port that communicates with the chamber. The balance column is movably inserted through the fourth communication port and can enter the chamber through the fourth communication port.

[0009] The above technical solution also includes a bellows and a second push rod. One end of the bellows is an open end. The open end, the second push rod, and the balance column are all connected to the other end of the bellows. The balance column is located inside the bellows.

[0010] The above technical solution also includes a fixed ring and a rotating ring. One end of the bellows is glued with a rubber ring, the bottom of the rotating ring is provided with a connecting ring, the fixed ring is located on the outside of the fourth connecting port, the rotating ring is threadedly connected to the inner side of the fixed ring, and the rubber ring abuts against the connecting ring on the inner side of the connecting ring.

[0011] In the above technical solution, a sloping rubber ring is provided between the inner wall of the balance column and the fourth connecting port, and the sloping rubber ring abuts against the balance column.

[0012] In the above technical solution, the first air pump is provided with a docking seat, the docking seat includes a docking ring and a docking tube connected by a return spring, the docking ring is provided on the first air pump, and one end of the sampling tube extends into the docking tube and abuts against the docking tube.

[0013] In the above technical solution, an indicator unit is provided on each of the opposite sides of the chamber. The indicator unit includes an indicator and an observation port that communicates with the chamber. The indicator is located behind the observation port and in the chamber.

[0014] Compared with the prior art, the gas relay of this invention has the following advantages: the invention can connect the chamber, the conduction chamber, the sampling tube and the first air pump by pushing the first valve plate with the first push rod, so that the first air pump can guide the gas in the chamber into the sampling tube; the two ends of the sampling tube are detachably connected to the first air pump and the conduction chamber respectively, and can be detached from the above position after the gas is guided into the sampling tube, so as to facilitate the detection of the gas.

[0015] In summary, this invention facilitates the sampling and detection of gas within the internal space of a gas relay in a closed environment, providing convenience for workers performing safety maintenance on transformers. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a gas relay;

[0017] Figure 2 This is a partial exploded view of the present invention;

[0018] Figure 3 In this invention Figure 2 Enlarged schematic diagram of the local structure at point A;

[0019] Figure 4 This is a side view cross-sectional structural diagram of the bellows in this invention;

[0020] Figure 5 This is a schematic diagram of the internal structure of the present invention;

[0021] Figure 6 In this invention Figure 5 Enlarged schematic diagram of the local structure at point B;

[0022] Figure 7 This is an exploded side view of the gas relay in this invention.

[0023] Figure 8 This is a top-view exploded view of the gas relay in this invention;

[0024] Figure 9 This is a schematic cross-sectional view of the sampling tube in this invention;

[0025] In the diagram: 1. Main body; 2. Balance column; 3. Sloping rubber ring; 4. Fixing ring; 5. Rotary ring; 6. Connecting ring; 7. Bellows; 8. Rubber ring; 9. Connecting block; 10. Sealing plate; 11. Airbag; 12. Locking block; 13. Connecting spring; 14. Second push rod; 15. Screw; 16. Transmission plate; 17. L-shaped limiting groove plate; 18. Float; 19. Indicator ball; 20. Transparent glass; 21. First valve plate; 22. Conducting chamber; 23. Second air pump; 24. Second valve plate; 25. First air pump; 26. Connecting ring; 27. Connecting pipe; 28. Return spring; 29. ​​Rubber sealing ring; 30. Sampling tube; 31. Locking ring; 32. Rubber sheet ring; 33. Third valve plate; 34. First push rod; 35. Ball bearing. Detailed Implementation

[0026] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0027] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "inner," and "outer," etc., used in this invention to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to 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 limiting this invention.

[0028] In the description of this invention, it should be understood that the terms "connected," "linked," and "fixed," etc., used in this invention should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or a welded connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] If the terms "first" and "second" are used only to distinguish technical features, they should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0030] This invention provides a gas relay sampling and detection device and its operating method, which solves the problem that although the gas relays currently in use can alarm for oil flow surges and gas accumulation, they do not have the function of sampling and detecting the presence of gas in the pipeline. This makes it impossible for staff to sample and analyze the gas in a timely and quick manner when the gas relay accumulates internally, making it difficult to adapt to the generation of gas and causing a series of accident risks.

[0031] The structure of this invention has good sealing performance during use, effectively preventing transformer oil leakage. At the same time, when sampling the gas in the pipeline, the gas sample storage component can be easily disassembled for easy handling and transfer by staff to test the gas. In addition, the device can also further observe the volume level line of gas above the oil chamber inside the gas relay.

[0032] like Figure 1 , Figure 2 , Figure 7 and Figure 8 As shown, a preferred embodiment of the present invention provides a gas relay comprising a main body 1, a conduction chamber 22, a sampling tube 30, and a first air pump 25. The conduction chamber 22 has a conduction cavity. The main body 1 has a first connecting port and a chamber. The first connecting port connects the chamber and the conduction cavity. A first valve plate 21 is hinged to the first connecting port and covers it. The first valve plate 21 is provided with a first reset unit. The conduction chamber 22 is provided with a first push rod 34, which is positioned toward the first valve plate 21. The two ends of the sampling tube 30 are detachably installed on the first air pump 25 and the conduction chamber 22, respectively. The sampling tube 30 can connect the first air pump 25 and the conduction chamber 22.

[0033] It is understood that the two ends of the main body 1 are connected to the pipelines of the transformer body and the oil tank. When it is necessary to issue a prompt or alarm due to the presence of gas inside the main body 1, the present invention can perform gas sampling and detection. The present invention can connect the chamber, the conduction chamber 22, the sampling tube 30 and the first air pump 25 by extending the first push rod 34 to push the first valve plate 21, so as to facilitate the first air pump 25 to guide the gas in the chamber into the sampling tube 30. The two ends of the sampling tube 30 are detachably connected to the first air pump 25 and the conduction chamber 22 respectively, and can be detached from the above positions after the gas is guided into the sampling tube 30, so as to facilitate gas detection.

[0034] In summary, this invention facilitates the sampling and detection of gas within the internal space of a gas relay in a closed environment, bringing convenience to workers performing safety maintenance on transformers.

[0035] Preferably, the present invention employs a wireless gas sensor, which can sample the gas present in the internal space of the gas relay in a closed state, and uses a wireless sensing module to realize online monitoring of some or all of the gas.

[0036] Preferably, a ball bearing 35 is provided in the spherical groove at the end of the first push rod 34.

[0037] Preferably, the first reset unit includes a first torsion spring, which connects the first valve plate 21 and the conduction chamber 22, so that when the first valve plate 21 is opened, a reset force is generated on the first valve plate 21, so that when the first push rod 34 retracts, the first valve plate 21 can cover the first communication port again to avoid gas leakage from the chamber.

[0038] like Figure 1 , Figure 2 and Figure 5 As shown, in one embodiment, a second air pump 23 is also included. The conduction chamber 22 has a second communication port, which connects the second air pump 23 and the conduction chamber. A second valve plate 24 that can cover the second communication port is hinged to the second communication port. The second valve plate 24 is provided with a second reset unit.

[0039] Specifically, after the sampling tube 30 completes sampling, the second air pump 23 can generate suction when it is working. It can draw in the gas located in the conduction cavity through the second connecting port to avoid gas leakage in the conduction cavity.

[0040] In the above embodiment, after one sampling is completed, the sampling tube 30 is replaced; the first push rod 34 is restarted to retract, no longer restricting the first valve plate 21. At this time, the second air pump 23 is started, generating suction, which drives the second valve plate 24 to open, drawing gas from inside the conduction cavity and discharging it from the output end. After the gas in the conduction cavity is completely discharged, the staff performs troubleshooting and maintenance on the main body 1, after which the main body 1 can continue to operate.

[0041] like Figure 1 , Figure 2 , Figure 7 and Figure 8 As shown, preferably, the second reset unit includes a second torsion spring, which connects the second valve plate 24 and the conduction chamber 22, so that when the second valve plate 24 is opened, a reset force is generated on the second valve plate 24, so that when the second air pump 23 stops working, the second valve plate 24 can cover the second communication port again to avoid gas leakage from the conduction chamber.

[0042] like Figure 7 and Figure 8 As shown, the conduction chamber 22 further has a third connecting port, which connects the sampling tube 30 and the conduction cavity. The third connecting port is hinged to a third valve plate 33 that can cover the third connecting port. The third valve plate 33 is provided with a third reset unit.

[0043] Understandably, gas leakage is likely to occur at the third connection port after the sampling tube 30 is removed. The third valve plate 33 can be re-covered at the third connection port via the third reset unit to reduce the occurrence of gas leakage.

[0044] Preferably, the third reset unit includes a third torsion spring, which connects the third valve plate 33 and the conduction chamber 22, so that when the third valve plate 33 is opened, a reset force is generated on the third valve plate 33, so that when the sampling tube 30 is removed, the third valve plate 33 can cover the third communication port again to avoid gas leakage in the conduction chamber.

[0045] like Figure 2 As shown, it further includes a balance column 2. The main body 1 has a fourth communication port that communicates with the chamber. The balance column 2 is movably inserted through the fourth communication port and can enter the chamber through the fourth communication port.

[0046] It is understandable that the balance column 2 adjusts the cross-sectional size of the pipe inside the main body 1 by adjusting the degree to which it enters the chamber, thereby balancing the negative pressure state inside the gas relay main body 1 caused by the removal of gas from the main body 1.

[0047] like Figure 2 , Figure 3 and Figure 4As shown, in the above embodiment, a bellows 7 and a second push rod 14 are also included. One end of the bellows 7 is an open end. The second push rod 14 and the balance column 2 are both connected to the other end of the bellows 7. The balance column 2 is located inside the bellows 7.

[0048] It is understandable that the bellows 7 provides a sealing effect for the balance column 2 to move on the surface of the main body 1, so that even if there is leakage, the oil will be stored inside the bellows 7 and will not overflow.

[0049] Preferably, a screw 15 is inserted into the surface of one end of the second push rod 14 in an annular shape through a thread, and a transmission plate 16 is threaded onto the surface of the screw 15. An L-shaped limiting groove plate 17 is symmetrically fixedly connected to the surface of the bellows 7. The transmission plate 16 is disposed between the two sets of L-shaped limiting groove plates 17 and is slidably connected to the L-shaped limiting groove plates 17.

[0050] like Figure 2 and Figure 3 As shown, in the above embodiment, a fixing ring 4 and a rotating ring 5 are also included. A rubber ring 8 is glued to one end of the bellows 7. A connecting ring 6 is provided at the bottom of the rotating ring 5. The fixing ring 4 is located on the outside of the fourth connecting port. The rotating ring 5 is threadedly connected to the inner side of the fixing ring 4. The rubber ring 8 abuts against the connecting ring 6 on the inner side of the connecting ring 6.

[0051] Understandably, this design improves the sealing of the open end to prevent gas leakage from the junction of the bellows 7 and the main body 1. With the connecting ring 6, when the rotating ring 5 engages with the surface of the main body 1 to clamp the rubber ring 8 and secure the bellows 7, the connecting ring 6 replaces the rotating ring 5 in engaging with the main body 1 to restrict the bellows 7. The rotating ring 5 extends into the fixed ring 4 via a threaded connection. Since the rotating ring 5 and the connecting ring 6 are connected by a bearing, the friction generated by the contact surface between the connecting ring 6 and the rubber ring 8 prevents the connecting ring 6 from rotating synchronously with the rotating ring 5. This prevents frictional wear on the rubber ring 8 when the rotating ring 5 engages with the surface of the main body 1 to clamp it.

[0052] Preferably, in the above embodiments, such as Figure 4As shown, a connecting block 9 is fixedly connected inside the corrugated pipe 7. A through hole is formed at the center of the surface of the connecting block 9. A sealing piece 10 is glued to the inner wall of the through hole at the center of the surface of the connecting block 9. An airbag 11 is provided inside the connecting block 9. Sliding grooves are symmetrically formed at equal intervals inside the connecting block 9. A locking block 12 is slidably connected to the connecting block 9 through the sliding grooves. A groove adapted to the connecting block 9 is formed on the surface of one end of the balance column 2, and a locking slot adapted to the locking block 12 is formed inside the groove. The connecting block 9 and the locking block 12 are respectively inserted into the groove and the locking slot. A connecting spring 13 is fixedly connected to the sliding groove inside the connecting block 9. One end of the connecting spring 13 is fixedly connected to the locking block 12. A through hole is formed at the center of the surface of the corrugated pipe 7. The through hole on the surface of the corrugated pipe 7 is opposite to the through hole on the surface of the connecting block 9. The through hole on the surface of the connecting block 9 is connected to the cavity inside the connecting block 9 for setting the airbag 11.

[0053] Understandably, when the staff performs maintenance on this part, they first use a screwdriver to unscrew the screw 15 from the surface of the transmission plate 16, and then push the transmission plate 16 to disengage from the L-shaped limiting groove plate 17. At this time, the staff can use a tool such as a steel needle to puncture the sealing plate 10 and the airbag 11, so that the airbag 11 will release the internal gas due to the rupture and collapse. As a result, the locking block 12 is no longer restricted by the airbag 11. The connecting spring 13 connected to the sliding groove inside the docking block 9 rebounds and drives the locking block 12 to retract into the docking block 9. At this time, the docking block 9 can be removed from the inside of the balance column 2. The staff can then rotate the rotating ring 5, and the rotating ring 5 will unscrew from the fixing ring 4 through the thread action. It will no longer cooperate with the rubber ring 32 on the surface of the corrugated pipe 7 that clamps the surface of the main body 1. The corrugated pipe 7 can then be removed from the surface of the main body 1. The staff can then replace the corrugated pipe 7 and install it through the above structure. The maintenance work of this part of the structure is then completed.

[0054] Preferably, a sloping rubber ring 3 is provided between the inner wall of the balance column 2 and the fourth connecting port, and the sloping rubber ring 3 abuts against the balance column 2. The sloping rubber ring 3 and the bellows 7 provide a sealing effect for the balance column 2 to move on the surface of the main body 1, and even if leakage occurs, the oil will be stored inside the bellows 7 and will not overflow.

[0055] Furthermore, such as Figure 7 , Figure 8 and Figure 9 As shown, the first air pump 25 is provided with a docking seat, which includes a docking ring 26 and a docking tube 27 connected by a return spring 28. The docking ring 26 is located on the first air pump 25, and one end of the sampling tube 30 extends into the docking tube 27 and abuts against the docking tube 27.

[0056] Preferably, both ends of the sampling tube 30 are connected to locking rings 31 via damping bearings. The ends of the two sets of locking rings 31 that are far apart from each other abut against the ends of the two sets of connecting tubes 27 that are close to each other. Rubber rings 32 are symmetrically glued to the inside of the locking rings 31 and the sampling tube 30. Rubber sealing rings 29 are glued to the inside of the ends of the connecting tubes 27 that are close to each other.

[0057] Furthermore, such as Figure 5 and Figure 6 As shown, indicator units are provided on opposite sides of the chamber. It can be understood that the indicator units can indicate the volume of gas within the chamber.

[0058] In the above embodiment, the indicating unit includes an indicator and an observation port communicating with the chamber. The indicator is located behind the observation port and within the chamber. This configuration allows the indicator to indicate the volume of gas present in the upper part of the chamber and the gas level line.

[0059] like Figure 5 and Figure 6 As shown, the inner walls of the four corners of the main body 1 are provided with sliding grooves. The main body 1 is slidably connected to a float 18 through the sliding grooves. One side of the float 18 is connected to an indicator ball 19 through a pivot. Transparent glass 20 is fixedly connected to the four corners of the surface of the main body 1. The transparent glass 20 and the indicator ball 19 are arranged in a relative position.

[0060] like Figure 6 As shown, the float 18 has a hollow structure, the surface of the indicator ball 19 has circular grooves at equal intervals in an annular shape, the surface of the transparent glass 20 is marked with scales, and the longitudinal and transverse cross sections of the internal space of the main body 1 are both rectangular.

[0061] With this setup, the float 18 moves the indicator ball 19 within the chamber due to buoyancy. The operator observes the indicator ball 19 through the transparent glass 20 and reads the liquid level by comparing the scale with the circular groove. This allows for the calculation of the size and proportion of the chamber space occupied by the gas, and also helps determine whether the liquid level in the chamber is below the first connecting port, further confirming the availability of sampling conditions. The four corners are designed to allow the operator to obtain the average of four sets of readings, thus making the measurement of the gas present in the chamber more accurate.

[0062] The working process of this invention is as follows:

[0063] Step 1: Start gas sampling. Start the first push rod 34, which extends and passes through the first connecting port. Its end abuts against the first valve plate 21, opening the first valve plate 21 and connecting the chamber to the inside of the conduction chamber 22. Start the first air pump 25, which generates suction. The suction opens the third valve plate 33, connecting the conduction chamber to the sampling tube 30.

[0064] Step 2: Gas detection. When the first air pump 25 has been running for a certain period of time, the pipeline formed by the docking ring 26, sampling tube 30 and locking ring 31 is filled with gas, and the operator turns off the first air pump 25; at this time, if a built-in gas sensor is used, online gas detection can be achieved.

[0065] This step can also be performed offline by personnel sampling. The staff simultaneously rotates two sets of locking rings 31, causing the rubber rings 32 to be twisted as the locking rings 31 rotate at both ends of the sampling tube 30. The damping bearings connected to the locking rings 31 and the sampling tube 30 prevent the rubber rings 32 from rotating and resetting due to their own elasticity. At this point, the rubber rings 32 at both ends of the sampling tube 30 and the openings of the locking rings 31 form a closed space. Then, the staff pushes the connecting pipe 27 into the connecting ring 26 to insert a compression spring, causing the spring to compress and deform. The sampling tube 30 and locking rings 31 can then be detached from the connecting pipe 27. The staff then transfers the gas stored inside the sampling tube 30, along with the sampling tube 30 and locking rings 31, for testing.

[0066] Step 3: Replace sampling tube 30. After completing one gas detection, the staff can replace the sampling tube 30 with a new one and install the locking ring 31 between the connecting tubes 27 for the next use.

[0067] Step 4: After sampling and replacing the sampling tube 30 and locking ring 31, the staff can restart the first push rod 34 to retract, no longer restricting the first valve plate 21. At this time, the second air pump 23 is started, and the input end of the second air pump 23 generates suction. The suction drives the second valve plate 24 to rotate and open, drawing gas from the conduction chamber. Simultaneously, the first valve plate 21 and the third valve plate 33 are reset, forming a closed space. The chamber is also formed into a closed space. After the staff troubleshoots and maintains the main body 1, the main body 1 can continue to work and operate.

[0068] Step 5: Activate the second push rod 14. The second push rod 14 extends and retracts, which drives the screw 15 to stretch or shorten the bellows 7. Simultaneously, the balance column 2 connected to the docking block 9 fixed inside the bellows 7 can extend into or out of the main body 1 to adjust the size of the pipe cross section inside the gas relay main body 1 and balance the negative pressure state inside the gas relay main body 1.

[0069] Step 6: During maintenance, the worker uses a screwdriver to unscrew the screw 15 from the surface of the transmission plate 16, and then pushes the transmission plate 16 to disengage from the L-shaped limiting groove plate 17. At this time, the worker can use a tool such as a steel needle to puncture the sealing plate 10 and the airbag 11, so that the airbag 11 will release the internal gas and collapse due to the rupture. As a result, the locking block 12 is no longer restricted by the airbag 11. The connecting spring 13 connected to the sliding groove inside the docking block 9 rebounds and drives the locking block 12 to retract into the docking block 9. At this time, the docking block 9 can be removed from the inside of the balance column 2. The worker then rotates the rotating ring 5, and the rotating ring 5 is unscrewed from the fixing ring 4 through the thread action. It no longer cooperates with the rubber ring 32 on the surface of the corrugated pipe 7 that clamps the surface of the main body 1. The corrugated pipe 7 can then be removed from the surface of the main body 1. The worker can then replace the corrugated pipe 7 and install it through the above structure. The maintenance work of this part of the structure is completed.

[0070] In summary, the present invention provides a gas relay in which the first push rod 34 extends to push the first valve plate 21, thereby connecting the chamber, the conduction chamber 22, the sampling tube 30, and the first air pump 25, facilitating the first air pump 25 to guide the gas in the chamber into the sampling tube 30. The two ends of the sampling tube 30 are detachably connected to the first air pump 25 and the conduction chamber 22, respectively, and can be detached from the above-mentioned positions after the gas is guided into the sampling tube 30, facilitating gas detection.

[0071] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make several improvements and substitutions without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A gas relay, characterized in that, The device includes a main body, a conduction chamber, a sampling tube, and a first air pump. The conduction chamber has a conduction cavity. The main body has a first connecting port and a chamber. The first connecting port connects the chamber and the conduction cavity. A first valve plate that can cover the first connecting port is hinged to the first connecting port. The first valve plate has a first reset unit. The conduction chamber has a first push rod that faces the first valve plate. The two ends of the sampling tube are detachably installed on the first air pump and the conduction chamber, respectively. The sampling tube can connect the first air pump and the conduction chamber. A wireless gas sensor is installed inside the sampling tube. It also includes a second air pump, the conduction chamber has a second communication port, the second communication port connects the second air pump and the conduction chamber, the second communication port is hinged to a second valve plate that can cover the second communication port, and the second valve plate is provided with a second reset unit.

2. The gas relay according to claim 1, characterized in that, The conduction chamber has a third connecting port, which connects the sampling tube and the conduction cavity. The third connecting port is hinged to a third valve plate that can cover the third connecting port. The third valve plate is provided with a third reset unit.

3. The gas relay according to claim 1, characterized in that, It also includes a balance column, the main body having a fourth communication port communicating with the chamber, the balance column being movably inserted through the fourth communication port and being able to enter the chamber through the fourth communication port.

4. The gas relay according to claim 3, characterized in that, It also includes a bellows and a second push rod. One end of the bellows is an open end, and the second push rod and the balance column are both connected to the other end of the bellows. The balance column is located inside the bellows.

5. The gas relay according to claim 4, characterized in that, It also includes a fixed ring and a rotating ring. One end of the bellows is glued with a rubber ring. The bottom of the rotating ring is provided with a connecting ring. The fixed ring is located on the outside of the fourth connecting port. The rotating ring is threadedly connected to the inner side of the fixed ring. The rubber ring abuts against the connecting ring on the inner side of the connecting ring.

6. The gas relay according to claim 3, characterized in that, A sloping rubber ring is provided between the inner wall of the balance column and the fourth connecting port, and the sloping rubber ring abuts against the balance column.

7. The gas relay according to claim 1, characterized in that, The first air pump is provided with a docking seat, which includes a docking ring and a docking tube connected by a return spring. The docking ring is located on the first air pump, and one end of the sampling tube extends into the docking tube and abuts against the docking tube.

8. The gas relay according to claim 1, characterized in that, Indicator units are provided on opposite sides of the chamber.

9. The gas relay according to claim 8, characterized in that, The indicating unit includes an observation port that communicates with the chamber, and the indicating element is located behind the observation port and within the chamber.

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