Gas circuit quick connecting device

Abstract

The utility model relates to a gas circuit quick connection device, and relates to the technical field of environment monitoring, the gas circuit quick connection device comprises an anode head and a cathode head, the anode head comprises a base, a sleeve and a communication part, the sleeve sleeves the upper end of the base along the length direction, and the communication part is arranged in the base; the cathode head comprises an inner cylinder, an abutting part and an outer cylinder, the abutting part can move in the inner cylinder, a first sealing ring is arranged in the outer cylinder, and the abutting part is sleeved with the first sealing ring; the anode head can move, so that the outer cylinder extends into the sleeve, the communicating part penetrates through the outer cylinder and the first sealing ring and abuts against the lower end of the abutting part, the abutting part moves upwards to be separated from the first sealing ring, and then gas can penetrate through the inner cylinder and enter the communicating part; and finally, the water flows in the base. The gas circuit quick connection device is used for solving the problem that the quick connection resistance is large when an anode head and a cathode head of an existing gas circuit quick connection device are connected in an inserted mode.

Description

Technical Field

[0001] This application relates to the field of environmental monitoring technology, and in particular to a quick-connect device for gas circuits. Background Technology

[0002] Gas connection devices are widely used in industrial production, medical equipment, and daily life, especially in the field of volatile organic compound (VOCs) monitoring. With increasingly stringent environmental protection requirements, the performance requirements for VOCs monitoring equipment are becoming more and more stringent, and gas connection devices, as a key component, directly affect the efficiency and accuracy of gas transmission.

[0003] In current quick-connect gas circuit devices, the anode head is inserted into the cathode head to allow gas flow. Because a conduit needs to be inserted into the cathode head through the anode head's sleeve for gas flow, the sleeve cannot be too small. Consequently, the opening of the cathode head's outer cylinder cannot be too small, and the sealing ring inside the outer cylinder must be large enough to seal the sleeve. This results in a large contact area between the sleeve and the sealing ring, leading to high quick-connect resistance and inconvenient operation, especially with frequent connections, which is time-consuming and laborious. Therefore, reducing connection resistance has become an urgent technical problem to be solved. Utility Model Content

[0004] This application provides a quick-connect device for gas circuits to solve the problem of high quick-connect resistance when the anode and cathode heads of current quick-connect devices are inserted.

[0005] A quick-connect device for air circuits, comprising:

[0006] An anode head includes a base, a sleeve, and a connecting part. Both the base and the sleeve are hollow inside and open at both ends. The sleeve is fitted over the upper end of the base along its length. The connecting part is located inside the base and extends into the sleeve from above, allowing gas to enter the connecting part and flow to the base.

[0007] The cathode head includes an inner cylinder, a contact portion, and an outer cylinder. The inner cylinder is hollow, and the contact portion is located inside the inner cylinder at its lower end along its length. The contact portion is movable within the inner cylinder. The outer cylinder is hollow and open at both ends. The outer cylinder covers the lower end of the inner cylinder, and the two are sealed and fixed together. A first sealing ring is provided inside the outer cylinder. The first sealing ring is fitted over the contact portion. The anode head is movable so that the outer cylinder extends into the sleeve, and the connecting portion passes through the outer cylinder and the first sealing ring, abutting against the lower end of the contact portion. This causes the contact portion to move upward and separate from the first sealing ring, allowing gas to pass through the inner cylinder and enter the connecting portion, ultimately flowing within the base.

[0008] By adopting the above technical solution, the cathode head is relatively small, and the inner cylinder and the first sealing ring are also small in size, resulting in a small contact area with the anode head. This reduces resistance during quick insertion, making the connection operation easier and more convenient, and improving work efficiency. The first sealing ring requires fewer sealing points, reducing the probability of leakage due to errors caused by multiple sealing points. Simultaneously, the first sealing ring is located on the inner wall of the outer cylinder and has abutment portion, making it difficult for gas to flow out from either side of the first sealing ring. This enhances the sealing performance of the quick-connect device, ensuring no gas leakage during transmission and guaranteeing the normal operation of the gas system. Furthermore, the first sealing ring also prevents movement of the connecting portion, serving a fixing function.

[0009] In one embodiment, the abutting portion includes an abutting block and a first elastic member. The abutting block is trapezoidal and disposed in the inner cylinder. The first sealing ring is fitted over the abutting block and can prevent gas from leaking from the inner cylinder. The first elastic member is disposed in the inner cylinder and connected downward to the abutting block. The first elastic member can contract and drive the abutting block to move upward.

[0010] By adopting the above technical solution, the first sealing ring is fitted with an abutment block, which effectively prevents gas from flowing through the outer side of the first sealing ring and between the inner side of the first sealing ring and the abutment block in the inner cylinder. When the cathode head is not in use, it can achieve a good seal, prevent gas leakage, and ensure the sealing and stability of the gas circuit system in the non-working state.

[0011] In one embodiment, the connecting part includes an air tube and a flow block. The air tube is hollow inside and has a through hole at its upper end along its length. The flow block is located at the lower end of the air tube and communicates with the air tube. The base is fitted with the flow block and is sealed and fixed to the sleeve. The flow block has an air hole. The gas in the cathode head flows through the through hole of the air tube to the air hole and finally enters the base.

[0012] By adopting the above technical solution, when the air tube is inserted into the outer cylinder, it fits tightly against the inner side of the first sealing ring. At the same time, it abuts against the abutting block, causing the first elastic element to contract and the abutting block to separate from the first sealing element. This design ensures that the gas can smoothly enter the air tube and flow to the base in the connected state, while ensuring the sealing of the connection and preventing gas leakage.

[0013] In one embodiment, the connecting portion further includes a second sealing ring disposed on the inner wall of the sleeve. The second sealing ring can seal the air hole and sleeve the air tube, and the flow block can move downward to separate from the second sealing ring.

[0014] By adopting the above technical solution, under normal circumstances, the air holes of the flow block are sealed by the second sealing ring, so that both the inner and outer sides of the second sealing ring are sealed, preventing gas leakage, ensuring the integrity and sealing of the gas circuit system when it is not working, and reducing gas loss and external interference.

[0015] In one embodiment, the connecting portion further includes a second elastic member disposed within the base and connected to the lower end of the flow block. The second elastic member is capable of contracting and driving the flow block to move downward.

[0016] By adopting the above technical solution, the second elastic element is located inside the base and connected to the lower end of the flow block. When it is necessary to connect the air passage, the air pipe is forced downward to abut against the second elastic element, causing the flow block to move downward. The air hole moves away from the second sealing ring, and the air pipe is sleeved by the second sealing ring to prevent the gas from flowing upward out of the sleeve in the air hole. This allows the gas to flow only through the air pipe to the air hole and then to the base. At the same time, the second sealing ring can also fix the air pipe after insertion, preventing the anode head and cathode head from separating. This achieves flexible control of the air passage, making it convenient for users to open or close the air passage according to actual needs.

[0017] In one embodiment, the connecting portion further includes a third sealing ring, which is disposed within the base and sleeved on the flow block, and the vent is disposed between the second sealing ring and the third sealing ring.

[0018] By adopting the above technical solution, the second and third sealing rings provide double sealing protection for the quick-connect air passage device. Under normal circumstances, gas flowing towards the air hole is blocked by these two sealing rings, preventing flow and ensuring the air passage's sealing performance when not in operation. When the air pipe abuts against the abutment block, causing the air hole to move downwards to the lower end of the third sealing ring, gas can flow through the air hole. This design not only ensures sealing performance but also allows for air passage opening when needed.

[0019] In one embodiment, the upper end of the trachea is concave, and the lower end of the abutment block is provided with a plurality of protrusions, the plurality of protrusions being spaced apart and abutting against the edge of the trachea.

[0020] By adopting the above technical solution, this structural design leaves a distance between the contact block and the air tube, which facilitates the gas to pass through the gap between the protrusions and then through the through hole into the air tube. This avoids the situation where the gas cannot enter the air tube when the contact block and the air tube are flush together, effectively improving the efficiency of gas flow and ensuring that the gas circuit system can transmit gas quickly and stably.

[0021] In one embodiment, the surfaces of the anode head and the cathode head are coated with an inert quartz glass coating.

[0022] By adopting the above technical solution, the surface is made smooth, reducing frictional resistance during the connection process and making the quick-connect operation smoother. At the same time, the smooth surface also reduces the adsorption of gas on the device surface, reducing problems such as gas path obstruction or contamination that may be caused by gas adsorption, and improving the performance and reliability of the gas path system.

[0023] In one embodiment, the inner cylinder is threadedly connected to the outer cylinder, and the first sealing ring abuts against the lower end face of the inner cylinder; the sleeve is threadedly connected to the base, and the second sealing ring abuts against the upper end face of the base.

[0024] By adopting the above technical solution, the threaded connection between the inner and outer cylinders, and between the sleeve and the base, combined with the first sealing ring abutting the lower end face of the inner cylinder and the second sealing ring abutting the upper end face of the base, effectively seals the gaps at the connection points, preventing gas from flowing into these areas, reducing the possibility of gas leakage, and improving the sealing performance of the quick-connect gas path device. The sealed gaps reduce the contact between gas and the connection points, thereby reducing gas adsorption at these locations, avoiding gas path problems that may be caused by gas adsorption, and ensuring the normal operation of the gas path system and the accuracy of gas transmission.

[0025] In one embodiment, the sleeve is provided with a retaining ring that extends inward and abuts against the second sealing ring, the air pipe passes through the retaining ring, and the upper end of the retaining ring abuts against the outer cylinder.

[0026] By adopting the above technical solution, the fixing ring inside the sleeve extends inward and is located above the second sealing ring. The gas pipe passes through the fixing ring, and the upper end of the fixing ring can abut against the outer cylinder. This structural design enhances the stability of the connection between the anode head and the cathode head, ensuring that no loosening or displacement occurs between the components during the gas connection and gas transmission process, thus guaranteeing the reliability and safety of the gas system.

[0027] In summary, this application includes at least one beneficial effect:

[0028] 1. The cathode head is relatively small, as are the inner cylinder and the first sealing ring. This results in a small contact area with the anode head, reducing resistance during quick insertion and making the connection operation easier and more convenient, thus improving work efficiency. The first sealing ring requires fewer sealing points, reducing the probability of leakage due to errors caused by multiple sealing areas. Furthermore, the first sealing ring is located on the inner wall of the outer cylinder and has a mating part, making it difficult for gas to flow out from either side of the first sealing ring. This enhances the sealing performance of the quick-connect device, ensuring no gas leakage during transmission and guaranteeing the normal operation of the gas system. Additionally, the first sealing ring also prevents movement of the connecting part, providing a fixing function.

[0029] 2. The second elastic element is located inside the base and connected to the lower end of the flow block. When the air passage needs to be connected, the air pipe is forced downward to abut against the second elastic element, causing the flow block to move downward. The air hole moves away from the second sealing ring, and the air pipe is fitted by the second sealing ring to prevent the gas from flowing upward out of the sleeve in the air hole. This allows the gas to flow only through the air pipe to the air hole and then to the base. At the same time, the second sealing ring can also fix the air pipe after insertion, preventing the anode head and cathode head from separating. This achieves flexible control of the air passage, making it convenient for users to open or close the air passage according to actual needs.

[0030] 3. The second and third sealing rings provide double sealing protection for the quick-connect air circuit device. Under normal circumstances, gas flowing towards the air hole is blocked by these two sealing rings, preventing flow and ensuring the air circuit's sealing performance when not in operation. When the air pipe abuts against the abutment block, causing the air hole to move downwards to the lower end of the third sealing ring, gas can flow through the air hole. This design not only ensures sealing performance but also allows for air circuit continuity when needed. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of a quick-connect pneumatic circuit device provided in an embodiment of this application;

[0032] Figure 2 This is a schematic diagram of the structure of an anode head provided in an embodiment of this application;

[0033] Figure 3 This is a cross-sectional view of an anode head provided in an embodiment of this application;

[0034] Figure 4 This is a schematic diagram of the structure of a cathode head provided in an embodiment of this application;

[0035] Figure 5 This is a cross-sectional schematic diagram of a cathode head provided in an embodiment of this application;

[0036] Figure 6 This is a cross-sectional schematic diagram of a quick-connect anode head and a cathode head provided in an embodiment of this application;

[0037] Figure 7 yes Figure 6 A magnified view of part A in the middle;

[0038] Figure 8 yes Figure 6 A magnified view of part B in the middle section;

[0039] Figure 9 This is a cross-sectional schematic diagram of an anode head provided in the second embodiment of this application.

[0040] Explanation of reference numerals in the attached drawings: 1. Anode head; 11. Base; 12. Sleeve; 121. Fixing ring; 13. Connecting part; 131. Air pipe; 1311. Through hole; 132. Flow block; 1321. Air hole; 133. Second sealing ring; 134. Second elastic element; 135. Third sealing ring; 2. Cathode head; 21. Inner cylinder; 22. Abutting part; 221. Abutting block; 2211. Protrusion; 222. First elastic element; 23. Outer cylinder; 231. First sealing ring. Detailed Implementation

[0041] The following is in conjunction with the appendix Figure 1-9 The quick-connect device for the gas circuit provided in this application will be described in further detail.

[0042] Example 1

[0043] Please see Figure 1-9 The present application provides a quick-connect device for a gas path, which includes an anode head 1 and a cathode head 2.

[0044] like Figures 1 to 3 As shown, the anode head 1 includes a base 11, a sleeve 12, and a connecting part 13. Both the base 11 and the sleeve 12 are hollow inside and open at both ends. The sleeve 12 is fitted onto the upper end of the base 11 along its length. The connecting part 13 is located inside the base 11 and extends upward into the sleeve 12, allowing gas to enter the connecting part 13 and flow to the base 11. Specifically, the connecting part 13 includes a gas pipe 131 and a flow block 132. The gas pipe 131 is hollow inside and has a through hole 1311 at its upper end along its length. The flow block 132 is located at the lower end of the gas pipe 131 and communicates with it. The base 11 is fitted with the flow block 132 and is sealed and fixed to the sleeve 12. The flow block 132 has a vent 1321, allowing gas to sequentially pass through the vent 1321 of the gas pipe 131 and the vent 1321 of the flow block 132 into the base 11. The combination of the air tube 131 and the through hole 1311 can be replaced with other pipe structures with the same function, such as a corrugated pipe or a straight pipe with a built-in guide rod. The flow block 132 can be replaced with a spherical block with a diversion hole or other flow elements of other shapes. The flow block 132 and the air tube 131 can be fixed by threaded connection or snap fastener to ensure structural stability and easy disassembly and maintenance.

[0045] like Figures 4 to 5As shown, the cathode head 2 includes an inner cylinder 21, an abutment part 22, and an outer cylinder 23. The inner cylinder 21 is hollow inside. The abutment part 22 is located inside the inner cylinder 21 and at the lower end of the inner cylinder 21 along its length. The abutment part 22 can move inside the inner cylinder 21. The outer cylinder 23 is hollow inside and open at both ends. The outer cylinder 23 covers the lower end of the inner cylinder 21. The inner wall surface of the outer cylinder 23 is provided with a first sealing ring 231, and the first sealing ring 231 is fitted onto the abutment part 22. The anode head 1 can move so that the outer cylinder 23 extends into the sleeve 12, and the connecting part 13 passes through the outer cylinder 23 and the first sealing ring 231 and abuts against the lower end of the abutting part 22, so that the abutting part 22 moves upward and separates from the first sealing ring 231. Then the gas can pass through the inner cylinder 21 and enter the gas pipe 131 and the flow block 132, and finally flow in the base 11. This reduces the contact area between the gas pipe 131 and the first sealing ring 231 when the gas pipe 131 enters the outer cylinder 23, which significantly reduces the connection resistance. At the same time, the gas pipe 131 abuts against the second sealing ring 133 and is sealed and fixed, which not only prevents the gas from flowing out of the outer cylinder 23, but also prevents the gas pipe 131 from moving.

[0046] like Figures 6 to 7 As shown, the abutment part 22 includes an abutment block 221 and a first elastic member 222. The abutment block 221 is trapezoidal and disposed in the inner cylinder 21. The cross-sectional area of ​​the abutment block 221 decreases towards the lower end in the length direction. The first sealing ring 231 is fitted onto the abutment block 221 and can prevent gas from leaking from the inner cylinder 21. The first elastic member 222 is disposed in the inner cylinder 21 and connected downward to the abutment block 221. The first elastic member 222 can contract and drive the abutment block 221 to move upward. The first elastic member 222 can be a high-strength spring or an elastic rubber pad. The up and down movement of the abutment block 221 is achieved by compression and release, thereby controlling the opening and closing of the gas passage. In this embodiment, the upper end of the air tube 131 can be concave, and the lower end of the abutment block 221 is provided with a plurality of protrusions 2211. The plurality of protrusions 2211 are spaced apart and abut against the edge of the air tube 131, making it easy to expose the through hole 1311. At the same time, the spacing between the plurality of protrusions 2211 facilitates the flow of gas into the through hole 1311, thereby improving the gas flow efficiency.

[0047] like Figure 8As shown, the connecting part 13 also includes a second sealing ring 133, which is disposed on the inner wall of the sleeve 12. The second sealing ring 133 can fit over the air tube 131 and the sealing air hole 1321. The flow block 132 can move downward to separate from the second sealing ring 133. The air hole 1321 on the flow block 132 needs to be set upward in the length direction. In this embodiment, the flow block 132 can be trapezoidal, and the air hole 1321 is located on the two inclined sides of the flow block 132 and is set upward, so as to be sealed by the second sealing ring 133. The connecting part 13 also includes a second elastic member 134, which is disposed in the base 11 and connected to the lower end of the flow block 132. The second elastic member 134 can contract and drive the flow block 132 to move downward. At this time, the second sealing ring 133 fits over the air tube 131. The second elastic member 134 can be a compression spring or a rubber pad. The flow block 132 can be moved up and down by compression and release, thereby controlling the opening and closing of the air hole 1321.

[0048] A retaining ring 121 may be provided inside the sleeve 12. The retaining ring 121 extends inward and is located at the upper end of the second sealing ring 133. The air pipe 131 passes through the retaining ring 121, and the upper end of the retaining ring 121 can abut against the outer cylinder 23. Specifically, when the outer cylinder 23 abuts against the upper surface of the retaining ring 121, the friction of the first sealing ring 231 and the second sealing ring 133 on the air pipe 131 prevents the air pipe 131 from moving, thus realizing the quick insertion of the anode head 1 and the cathode head 2.

[0049] Both the anode head 1 and the cathode head 2 are coated with an inert coating, such as a quartz glass coating, to make the surface smoother and reduce friction. The inner cylinder 21 is threadedly connected to the outer cylinder 23, and the first sealing ring 231 abuts against the lower end face of the inner cylinder 21; the sleeve 12 is threadedly connected to the base 11, and the second sealing ring 133 abuts against the upper end face of the base 11. The first sealing ring 231 is located on the outer cylinder 23 and abuts against the lower end face of the inner cylinder 21, sealing the gap between the outer cylinder 23 and the inner cylinder 21, reducing the contact area between the gas and the thread, and reducing adsorption; similarly, the second sealing ring 133 seals the gap between the base 11 and the sleeve 12, achieving the same effect. At the same time, since the coating is easily worn off and peeled off at the threaded areas due to frequent use, no coating is applied to these locations.

[0050] The implementation principle of this embodiment is as follows: Under normal circumstances, the second sealing ring 133 in the anode head 1 seals the air hole 1321 and the gap between the sleeve 12 and the base 11, and the first sealing ring 231 in the cathode head 2 seals the gap between the inner cylinder 21 and the outer cylinder 23 and the gap between the inner cylinder 21 and the abutment block 221, thus achieving sealing when not in use.

[0051] When needed, the two parts are brought closer together. The outer cylinder 23 extends into the sleeve 12, and the air pipe 131 extends into the outer cylinder 23. Then, the upper end of the air pipe 131 abuts against the protrusion 2211 at the lower end of the abutment block 221. Then, the first elastic element 222 and the second elastic element 134 are both compressed by force. The abutment block 221 moves upward, and the flow block 132 moves downward in the base 11. The air hole 1321 separates from the second sealing ring 133, and the air pipe 131 is fitted by the second sealing ring 133. During this process, the first sealing ring 231 also fits the air pipe 131 to prevent gas from flowing out. The gas flows through the abutment block 221 in the inner cylinder 21 to the through hole 1311 of the air pipe 131, and then flows into the base 11 through the air hole 1321 until the outer cylinder 23 abuts against the abutment ring in the sleeve 12. At this time, the air pipe 131 is fixed by the first sealing ring 231 and the second sealing ring 133, ensuring the rapid connection of the air circuit. When no connection is needed, the outer cylinder 23 is separated from the sleeve 12, and the air pipe 131 extends out from the outer cylinder 23. The first elastic element 222 and the second elastic element 134 are reset and apply force to the abutment block 221 and the flow block 132 respectively. Finally, the abutment block 221 abuts against the inner side of the first sealing ring 231, and the air hole 1321 abuts against the second sealing ring 133, thus achieving the sealing of the anode head 1 and the cathode head 2 respectively.

[0052] By optimizing the mating structure of anode head 1 and cathode head 2, the contact area is reduced and a multi-seal design is adopted, thereby significantly reducing the operating resistance during connection and improving sealing performance. The overall structure is simple and reliable, easy to manufacture and maintain, suitable for gas connection requirements in various complex environments, and facilitates the transport of small amounts of VOCs gas in the air to the monitoring device.

[0053] Example 2

[0054] like Figure 9 As shown, the difference between this embodiment and the above embodiment is that the connecting part 13 further includes a third sealing ring 135. The third sealing ring 135 is located at the lower end of the second sealing ring 133 and is fitted with a flow block 132. At this time, the flow block 132 is a column, and the air hole 1321 is located in the middle of the flow hole 1311 and communicates with the air pipe 131. The lower end of the flow block 132 is solid, and the air hole 1321 is located between the second sealing ring 133 and the third sealing ring 135 and is horizontally arranged. The combination logic of the third sealing ring 135 and the second sealing ring 133 is a double sealing design, which further improves the sealing reliability. In this embodiment, the third sealing ring 135 is located in the base 11. When the flow block 132 is moved downward by force, the air hole 1321 can pass through the third sealing ring 135 and extend into the lower part of the third sealing ring 135, so that the gas can flow into the base 11 through the air hole 1321, realizing the gas flow.

[0055] The implementation principle of this embodiment is as follows: the setting of the second sealing ring 133 and the third sealing ring 135 provides double sealing protection for the quick-connect device of the air circuit, realizing another way to ensure air circuit sealing and flow, which can be applied to more occasions.

[0056] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An air path quick coupling device, characterized by, include: The anode head (1) includes a base (11), a sleeve (12) and a connecting part (13). The base (11) and the sleeve (12) are both hollow inside and open at both ends. The sleeve (12) is fitted onto the upper end of the base (11) along the length direction. The connecting part (13) is located inside the base (11) and extends into the sleeve (12) from above. Gas can enter the connecting part (13) and flow to the base (11). The cathode head (2) includes an inner cylinder (21), a contact part (22), and an outer cylinder (23). The inner cylinder (21) is hollow inside. The contact part (22) is located inside the inner cylinder (21) and at the lower end of the inner cylinder (21) along its length. The contact part (22) is movable within the inner cylinder (21). The outer cylinder (23) is hollow inside and open at both ends. The outer cylinder (23) is fitted over the lower end of the inner cylinder (21) and sealed and fixed. A first sealing ring (231) is provided inside the outer cylinder (23). A sealing ring (231) is fitted onto the abutment portion (22). The anode head (1) can move so that the outer cylinder (23) extends into the sleeve (12). Then the connecting portion (13) passes through the outer cylinder (23) and the first sealing ring (231) and abuts against the lower end of the abutment portion (22), so that the abutment portion (22) moves upward and separates from the first sealing ring (231). Then the gas can pass through the inner cylinder (21) and enter the connecting portion (13), and finally circulate in the base (11).

2. The gas circuit quick connect device of claim 1, wherein, The abutting part (22) includes an abutting block (221) and a first elastic member (222). The abutting block (221) is trapezoidal and disposed in the inner cylinder (21). The first sealing ring (231) is fitted over the abutting block (221) and can prevent gas from leaking from the inner cylinder (21). The first elastic member (222) is disposed in the inner cylinder (21) and is connected downward to the abutting block (221). The first elastic member (222) can contract and drive the abutting block (221) to move upward.

3. The gas circuit quick connect device of claim 2, wherein, The connecting part (13) includes an air pipe (131) and a flow block (132). The air pipe (131) is hollow inside and has a through hole (1311) at its upper end along the length direction. The flow block (132) is located at the lower end of the air pipe (131) and communicates with the air pipe (131). The base (11) is fitted with the flow block (132) and is sealed and fixed with the sleeve (12). The flow block (132) has an air hole (1321). The gas in the cathode head (2) flows through the through hole (1311) of the air pipe (131) to the air hole (1321) and finally enters the base (11).

4. The gas circuit quick connect device of claim 3, wherein, The connecting part (13) further includes a second sealing ring (133), which is disposed on the inner wall of the sleeve (12). The second sealing ring (133) can seal the air hole (1321) and sleeve the air tube (131). The flow block (132) can move downward and separate from the second sealing ring (133).

5. The gas circuit quick connect device of claim 4, wherein, The connecting part (13) further includes a second elastic element (134), which is disposed in the base (11) and connected to the lower end of the flow block (132). The second elastic element (134) can contract and drive the flow block (132) to move downward.

6. The gas circuit quick connect device of claim 4, wherein, The connecting part (13) further includes a third sealing ring (135), which is disposed inside the base (11) and fitted with the flow block (132). The air hole (1321) is disposed between the second sealing ring (133) and the third sealing ring (135).

7. A quick-connect pneumatic circuit device according to claim 4, characterized in that, The upper end of the trachea (131) is concave, and the lower end of the abutment block (221) is provided with a plurality of protrusions (2211). The plurality of protrusions (2211) are spaced apart and abut against the edge of the trachea (131).

8. The gas circuit quick connect device of claim 4, wherein, The surfaces of the anode head (1) and the cathode head (2) are coated with an inert coating.

9. The gas circuit quick connect device of claim 8, wherein, The inner cylinder (21) is threadedly connected to the outer cylinder (23), and the first sealing ring (231) abuts against the lower end face of the inner cylinder (21); the sleeve (12) is threadedly connected to the base (11), and the second sealing ring (133) abuts against the upper end face of the base (11).

10. The gas circuit quick connect device of claim 4, wherein, The sleeve (12) is provided with a fixing ring (121), which extends inward and abuts against the second sealing ring (133). The air pipe (131) passes through the fixing ring (121), and the upper end of the fixing ring (121) can abut against the outer cylinder (23).

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