Quick-plug gas circuit control valve

Abstract

A quick-plug gas circuit control valve comprises an outer valve body, and gas outlet connectors communicated with the inner space of the outer valve body are arranged on the left side and the right side of the outer valve body. An inserting table is arranged on the upper surface of the outer valve body; a plugging hole is formed in the center of the upper surface of the plugging table; an air outlet hole communicated with the internal space of the outer valve body is formed in the center of the bottom of the inserting hole; an air inlet connector communicated with the inserting hole is arranged on the left side wall of the inserting table. An inner valve body matched with the inserting hole is arranged in the inserting hole; a fixing wing attached to the upper surface of the inserting table is arranged on the outer wall of the upper end of the inner valve body. According to the quick-insertion gas circuit control valve, quick disassembly and assembly can be achieved, the disassembly and assembly efficiency is guaranteed, the situation that due to frequent disassembly and assembly, the sealing performance of the connecting positions between the gas inlet connector and the pipeline of the gas conveying system and between the gas outlet connector and the pipeline of the gas conveying system becomes poor can be effectively avoided, the hidden danger of gas leakage is effectively eradicated, and meanwhile the replacement cost can be saved.

Description

Technical Field

[0001] The utility model relates to the field of valves, in particular to a quick-insert gas circuit control valve. Background Art

[0002] The gas circuit control valve is a valve used to control the gas flow rate. Its structure is the same as that of the ball valve. It also has an air inlet connector and an air outlet connector. The valve ball of the valve body can be rotated by simply turning the handwheel, thereby changing the connection state between the air inlet connector and the air outlet connector.

[0003] The gas circuit control valve is mainly used in the pipeline of the gas transmission system. The air inlet joint and the air outlet joint of the gas circuit control valve are directly connected to the pipeline in the gas transmission system. The pipeline of the gas transmission system is generally buried directly in the wall. Once fixed, it cannot be disassembled. The only thing that can be disassembled is the gas circuit control valve located in the hidden groove of the wall. In the actual use of the gas circuit control valve, its internal opening and closing structure will inevitably be damaged. At this time, the gas circuit control valve can only be replaced. The valve body of the traditional gas circuit control valve is an integrated structure. When the gas circuit control valve needs to be disassembled, the entire gas circuit control valve can only be removed from the pipeline of the gas transmission system, resulting in an extremely troublesome disassembly process and low disassembly efficiency. With the frequent disassembly and assembly of the gas circuit control valve, it is very easy to cause wear of the connection position between the air inlet joint, the air outlet joint and the end of the pipeline, affecting the sealing after the later reconnection, and there is a risk of leakage. In addition, in the case of an integrated gas circuit control valve body, even if only the internal opening and closing structure of the gas circuit control valve is damaged, the entire valve needs to be replaced, which will lead to a serious increase in replacement costs. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a quick-insert air circuit control valve, which can not only realize fast disassembly and assembly and ensure disassembly and assembly efficiency, but also effectively avoid the situation where frequent disassembly and assembly lead to poor sealing of the connection positions between the air inlet joint, the air outlet joint and the pipeline of the gas delivery system, effectively eliminate the hidden danger of air leakage, and at the same time, can save replacement costs.

[0005] The technical solution adopted by the utility model to solve the above technical problems is:

[0006] The utility model discloses a quick-plug air circuit control valve, comprising an outer valve body, wherein both left and right sides of the outer valve body are provided with air outlet joints interpenetrating with the inner space thereof; a plug-in platform is provided on the upper surface of the outer valve body; a plug-in hole is provided at the center of the upper surface of the plug-in platform; an air outlet hole interpenetrating with the inner space of the outer valve body is provided at the center of the bottom of the plug-in hole; an air inlet joint interpenetrating with the plug-in hole is provided on the left side wall of the plug-in platform; an inner valve body matching with the plug-in hole is provided in the plug-in hole; a fixing wing is provided on the outer wall of the upper end of the inner valve body, which is fitted with the upper surface of the plug-in platform; the fixing wing is fixed to the plug-in platform by a fixing structure; an opening and closing cavity is provided in the inner valve body; A valve ball matching with it is provided in the opening and closing cavity; a valve stem seat is provided at the center of the upper surface of the inner valve body; a valve stem hole communicating with the opening and closing cavity is provided at the center of the upper surface of the valve stem seat; a valve stem matching with the valve stem hole is provided at the upper end of the valve ball; the upper end of the valve stem passes upward to the outside of the valve stem hole and is provided with a set of handwheels outside the upper end of the valve stem seat; an air inlet hole is provided on the left side wall of the inner valve body; a left opening and closing hole is provided on the left side wall of the valve ball, and a lower opening and closing hole communicating with the left opening and closing hole is provided on the lower surface of the valve ball; the air inlet joint is communicated with the left opening and closing hole through the air inlet hole; an auxiliary hole is provided at the center of the lower surface of the inner valve body, and the air outlet hole is communicated with the lower opening and closing hole through the auxiliary hole.

[0007] The lower inner wall of the valve stem hole is provided with an annular limiting step; the outer wall of the valve stem is provided with an annular limiting part, and the upper surface of the limiting part is in contact with the limiting step; the upper surface of the valve ball is provided with a square slot; the center of the lower end surface of the valve stem is provided with a square head matching the slot; the inner wall of the upper end opening of the valve stem hole is provided with an annular limiting groove; the center of the upper inner wall of the hand wheel is provided with a connecting seat; the center of the lower surface of the connecting seat is provided with a groove, and the upper end of the valve stem seat is located in the groove; the center of the bottom of the groove is provided with a spring groove; the center of the upper surface of the hand wheel is provided with a hidden hole; the bottom of the hidden hole is provided with a connecting hole that is connected with the spring groove, and the upper end of the valve stem is inserted upward into the connecting hole; the center of the upper end surface of the valve stem is provided with a screw hole; a limiting screw is screwed into the screw hole, and the lower surface of the head of the limiting screw is in contact with the bottom of the hidden hole; a set of springs outside the valve stem is provided between the bottom of the spring groove and the bottom of the limiting groove.

[0008] The diameter of the air inlet hole is larger than the diameter of the valve ball; the inner wall of the main end of the air inlet hole is provided with an annular introduction part; the inner wall of the introduction part is provided with an introduction cone surface which is wider on the left and narrower on the right; the air inlet hole is provided with an embedding groove located on the right side of the introduction part, and the embedding groove is annular; the air inlet hole is provided with an annular limiting member; the outer wall of the left end of the limiting member is provided with an embedding part matching the embedding groove; the outer wall of the embedding part is provided with an extrusion cone surface which is wider on the left and narrower on the right; the embedding groove An auxiliary conical surface that fits the introduction conical surface is provided on the inner wall of the right part; a left clamping part in the shape of an annular shape is extended to the right from the edge of the right end opening of the inner hole of the limiting member; a left sealing ring is covered on the outer sleeve of the left clamping part, and the left end of the valve ball is embedded in the right end opening of the inner hole of the left sealing ring; an annular right clamping part is provided on the inner wall of the right side of the opening and closing cavity, and the right clamping part is coaxial with the left clamping part; a right sealing ring is covered on the outer sleeve of the right clamping part, and the right end of the valve ball is embedded in the left end opening of the inner hole of the right sealing ring.

[0009] An elastic notch is arranged on one side of the left portion of the limiting member.

[0010] The right outer wall of the left clamping portion is provided with an extrusion cone surface which is wider on the left and narrower on the right, and the extrusion cone surface is in contact with the inner wall of the left end opening of the inner hole of the left sealing ring.

[0011] The auxiliary hole diameter is larger than the valve stem diameter.

[0012] The outer wall of the valve stem is provided with a plurality of annular grooves evenly distributed in the axial direction; an O-ring matching the annular groove is arranged in the annular groove.

[0013] The fixing structure comprises a plurality of screw holes evenly arranged on the outer edge of the upper surface of the plug-in platform; the fixing wing is provided with a plurality of through holes coaxial with the screw holes; a fixing screw passes downward through the through hole and is screwed into the screw hole.

[0014] The valve stem seat is covered with a protective sleeve, and the lower end surface of the protective sleeve is in contact with the upper surface of the inner valve body; the lower end of the protective sleeve is covered with a protective cover, and the upper inner wall of the protective cover is in contact with the upper surface of the fixed wing; the protective cover is provided with a plurality of through holes coaxial with the through holes, and the fixing screws pass through the through holes, and the lower surface of the head of the fixing screws is in contact with the upper surface of the protective cover.

[0015] The beneficial effects of the utility model are:

[0016] When the quick-insert gas circuit control valve of the utility model structure is fixedly connected to the pipeline in the gas delivery system, only the outer valve body is fixedly connected to the pipeline of the gas delivery system, while the inner valve body is directly fixedly connected to the outer valve body, and the valve ball for controlling the opening and closing of the gas circuit control valve is located in the inner valve body. Therefore, if the valve ball or valve stem in the inner valve body is damaged, it is only necessary to remove the inner valve body from the outer valve body, and the outer valve body can always maintain the state of being connected to the pipeline in the gas delivery system, thereby effectively avoiding the inlet joint and the outlet joint. Frequent disassembly and assembly of the head and the pipelines in the gas delivery system cause wear, which effectively ensures the sealing of the connection positions between the air inlet joint, the air outlet joint and the pipelines of the gas delivery system. When the inner valve body needs to be disassembled, it is only necessary to unscrew the fixing screws from the screw holes to separate the fixed wing from the docking station. At this time, it is only necessary to pull the inner valve body upwards out of the docking hole to disassemble the inner valve body. The whole disassembly process is extremely simple, which can effectively ensure the disassembly efficiency and achieve the effect of quick insertion and quick removal. In the case of replacing only the inner valve body, the replacement cost can be effectively saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model quick-insert gas circuit control valve;

[0018] Figure 2 yes Figure 1 An enlarged view of part A. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0020] See also Figure 1 , Figure 2The utility model provides a quick-plug air circuit control valve, comprising an outer valve body 1, wherein both left and right sides of the outer valve body 1 are provided with outlet joints 2 which are connected with the inner space thereof; a plug-in platform 3 is provided on the upper surface of the outer valve body 1; a plug-in hole 4 is provided at the center of the upper surface of the plug-in platform 3; an outlet hole 5 which is connected with the inner space of the outer valve body 1 is provided at the center of the bottom of the plug-in hole 4; an air inlet joint 6 which is connected with the plug-in hole 4 is provided on the left side wall of the plug-in platform 3; an inner valve body 7 which matches the inner valve body 7 is provided in the plug-in hole 4; a fixing wing 8 which fits with the upper surface of the plug-in platform 3 is provided on the outer wall of the upper end of the inner valve body 7; the fixing wing 8 is fixed to the plug-in platform 3 by a fixing structure; an opening and closing cavity 9 is provided in the inner valve body 7; a matching A valve ball 10; a valve stem seat 11 is provided at the center of the upper surface of the inner valve body 7; a valve stem hole 12 which is connected to the opening and closing cavity 9 is provided at the center of the upper surface of the valve stem seat 11; a valve stem 13 which matches the valve stem hole 12 is provided at the upper end of the valve ball 10; the upper end of the valve stem 13 passes upward to the outside of the valve stem hole 12 and is provided with a hand wheel 14 outside the upper end of the valve stem 13 seat; an air inlet hole 15 is provided on the left side wall of the inner valve body 7; a left opening and closing hole 16 is provided on the left side wall of the valve ball 10, and a lower opening and closing hole 17 which is connected to the left opening and closing hole 16 is provided on the lower surface of the valve ball 10; the air inlet joint 6 is connected to the left opening and closing hole 16 through the air inlet hole 15; an auxiliary hole 18 is provided at the center of the lower surface of the inner valve body 7, and the air outlet hole 5 is connected to the lower opening and closing hole 17 through the auxiliary hole 18.

[0021] The lower inner wall of the valve stem hole 12 is provided with an annular limiting step 19; the outer wall of the valve stem 13 is provided with an annular limiting portion 20, and the upper surface of the limiting portion 20 is in contact with the limiting step 19; the upper surface of the valve ball 10 is provided with a square clamping groove 21; the center of the lower end surface of the valve stem 13 is provided with a square head 22 matching the clamping groove 21; the inner wall of the upper end of the valve stem hole 12 is provided with an annular limiting groove 23; the center of the upper inner wall of the hand wheel 14 is provided with a connecting seat 24; the center of the lower surface of the connecting seat 24 is provided with a groove 25, and the upper end of the valve stem seat 11 is provided with a groove 25. Located in the groove 25; a spring groove 26 is provided at the center of the bottom of the groove 25; a hidden hole 27 is provided at the center of the upper surface of the handwheel 14; a connecting hole 28 that is connected to the spring groove 26 is provided at the bottom of the hidden hole 27, and the upper end of the valve stem 13 is upwardly inserted into the connecting hole 28; a screw hole 29 is provided at the center of the upper end surface of the valve stem 13; a limit screw 30 is screwed in the screw hole 29, and the lower surface of the head of the limit screw 30 is fitted with the bottom of the hidden hole 27; a spring 32 is provided between the bottom of the spring groove 26 and the bottom of the limit groove 23, which is set outside the valve stem 13.

[0022] The diameter of the air inlet hole 15 is larger than the diameter of the valve ball 10; the inner wall of the main end of the air inlet hole 15 is provided with an annular introduction portion 33; the inner wall of the introduction portion 33 is provided with an introduction cone 34 which is wider on the left and narrower on the right; the air inlet hole 15 is provided with an embedding groove 35 located on the right side of the introduction portion 33, and the embedding groove 35 is annular; the air inlet hole 15 is provided with an annular limiting member 36; the outer wall of the left end of the limiting member 36 is provided with an embedding portion 37 matching the embedding groove 35; the outer wall of the embedding portion 37 is provided with an extrusion cone 38 which is wider on the left and narrower on the right; the embedding An auxiliary cone 39 that fits with the introduction cone 34 is provided on the right inner wall of the groove 35; a ring-shaped left clamping portion 40 is extended to the right from the edge of the right end opening of the inner hole of the limiting member 36; a left sealing ring 41 is covered on the left clamping portion 40, and the left end of the valve ball 10 is embedded in the right end opening of the inner hole of the left sealing ring 41; an ring-shaped right clamping portion 42 is provided on the right inner wall of the opening and closing cavity 9, and the right clamping portion 42 is coaxial with the left clamping portion 40; a right sealing ring 43 is covered on the right clamping portion 42, and the right end of the valve ball 10 is embedded in the left end opening of the inner hole of the right sealing ring 43.

[0023] A left side of the limiting member 36 is provided with an elastic notch.

[0024] The right outer wall of the left locking portion 40 is provided with an extrusion cone 45 which is wider on the left and narrower on the right. The extrusion cone 45 fits with the inner wall of the left end of the inner hole of the left sealing ring 41 .

[0025] The diameter of the auxiliary hole 18 is larger than the diameter of the valve stem 13 .

[0026] The outer wall of the valve stem 13 is provided with a plurality of annular grooves 46 evenly distributed in the axial direction; an O-ring 47 matching the annular groove 46 is provided in the annular groove 46 .

[0027] The fixing structure includes a plurality of screw holes 48 evenly arranged on the outer edge of the upper surface of the plug-in platform 3; the fixing wing 8 is provided with a plurality of through holes 49 coaxial with the screw holes 48; a fixing screw 50 passes downward through the through hole 49 and is screwed into the screw hole 48.

[0028] The valve stem seat 11 is covered with a protective sleeve 51, and the lower end surface of the protective sleeve 51 is in contact with the upper surface of the inner valve body 7; the lower end of the protective sleeve 51 is covered with a protective cover 52, and the upper inner wall of the protective cover 52 is in contact with the upper surface of the fixed wing 8; the protective cover 52 is provided with a plurality of through holes 53 coaxial with the through hole 49, and the fixing screws 50 pass through the through holes 53, and the lower surface of the head of the fixing screws 50 is in contact with the upper surface of the protective cover 52.

[0029] The method of using the utility model is as follows:

[0030] The air inlet connector 6 can be used to connect the air inlet pipeline in the gas delivery system, and the air outlet connectors 2 located on the left and right sides of the outer valve body 1 can be used to connect the air outlet pipeline in the gas delivery system. The existence of the two air outlet connectors 2 can achieve a diversion effect, which is convenient for providing gas to multiple pipelines at the same time. If in actual use, only one air pipeline needs to be connected, a plug can be screwed into one of the air outlet connectors 2 to block it. It can be seen that when the air circuit control valve is fixedly connected to the pipeline in the gas delivery system, only the outer valve body 1 is fixedly connected to the pipeline of the gas delivery system, and the inner valve body 7 is directly fixedly connected to the outer valve body 1, and the valve ball 10 for controlling the opening and closing of the air circuit control valve is located in the inner valve body. Therefore, if the valve ball 10 or the valve stem 13 in the inner valve body 7 is damaged, only The inner valve body 7 only needs to be removed from the outer valve body 1, and the outer valve body 1 can always maintain a state of being connected to the pipeline in the gas delivery system, thereby effectively avoiding the wear caused by frequent disassembly and assembly of the air inlet connector 6, the air outlet connector 2 and the pipeline in the gas delivery system, and effectively ensuring the sealing of the connection position between the air inlet connector 6, the air outlet connector 2 and the pipeline of the gas delivery system. When it is necessary to disassemble the inner valve body 7, it is only necessary to unscrew the fixing screw 50 from the screw hole 48 to achieve the separation between the fixed wing 8 and the docking station 3. At this time, it is only necessary to pull the inner valve body 7 out of the docking hole 4 upwards to achieve the disassembly of the inner valve body 7. The whole disassembly process is extremely simple, which can effectively ensure the disassembly efficiency and achieve the effect of quick insertion and quick removal. In the case of replacing only the inner valve body, the replacement cost can be effectively saved.

[0031] When it is necessary to control the opening and closing of the gas circuit control valve, the hand wheel 14 can be turned, and the hand wheel 14 will drive the valve stem 13 to rotate, and the square head 22 at the lower end of the valve stem 13 is engaged with the card slot 21. When the valve stem 13 rotates, the valve ball 10 rotates synchronously, and the left sealing ring 41 and the right sealing ring 43 on the left and right sides of the valve ball 10 can ensure the sealing of the valve ball when it rotates to avoid water leakage, and the left opening and closing hole 16 on the valve ball 10 will rotate synchronously with the valve ball 10. When the left opening and closing hole 16 on the valve ball 10 rotates to the inner wall of the opening and closing cavity 9, the valve ball 10 will rotate synchronously with the valve ball 10. When the opening of the left opening and closing hole 16 is in a relative position, the opening of the left opening and closing hole 16 is shielded and sealed by the inner wall of the opening and closing cavity 9. At this time, the air circuit control valve is in a closed state. When the opening of the left opening and closing hole 16 is rotated to a position coaxial with the air inlet connector 6, the air circuit control valve is in an open state. At this time, the gas in the air inlet pipeline will pass through the air inlet connector 6, the left end opening of the air inlet hole 15, the inner hole of the limiter 36, the left opening and closing hole 16, the lower opening and closing hole 17, the auxiliary hole 18, and the air outlet hole 5 in sequence into the internal space in the outer valve body 1, and then flow into the air outlet pipeline through the air outlet connector 2 for use.

[0032] A spring groove 26 is provided at the center of the bottom of the groove 25, and a spring 32 is provided between the bottom of the spring groove 26 and the bottom of the limit groove 23 and outside the valve stem 13. The presence of the spring 32 enables the valve stem 13 to move axially to a certain extent after installation, thereby facilitating the assembly between the square head 22 and the slot 21.

[0033] The existence of the auxiliary hole 18 facilitates the installation of the valve stem 13 from top to bottom into the valve stem hole 12, thereby facilitating the limit portion 20 to enter the valve stem hole 12, and the existence of the air inlet hole 15 facilitates the installation of the valve ball 10 into the opening and closing chamber 9. In order to avoid interference with the installation process of the valve ball 10 caused by the existence of the square head 22, the height of the square head 22 may be higher than the valve ball 10 at this time, and the square head 22 is not actually inserted into the slot 21. At this moment, the spring 32 can play a role in pressing down the valve stem 13. When the position of the valve ball 10 is limited by the limit member 36, as the valve stem 13 moves downward, the square head 22 will be inserted into the slot 21 at the upper end of the valve ball 10. At this time, the valve stem 13 is rotated by turning the hand wheel 14, and the valve ball 10 will rotate.

[0034] An elastic notch is provided on one side of the left portion of the limiting member 36, which can effectively increase the degree of deformation of the left portion of the limiting member 36. When the extrusion cone 38 is squeezed to the right along the introduction cone 34, the elastic notch can gradually narrow the left portion of the limiting member 36. When the embedding portion 37 is embedded in the embedding groove 35, the elasticity of the elastic notch will restore the left portion of the limiting member 36 to ensure the stability of the limiting member 36.

[0035] The right outer wall of the left locking portion 40 is provided with an extrusion cone 45 which is wider on the left and narrower on the right. The extrusion cone 45 fits against the inner wall of the left end hole of the left sealing ring 41. The extrusion cone 45 can press the left sealing ring 41 tightly against the outer wall of the left end of the valve ball 10, further improving the sealing effect of the left sealing ring 41.

[0036] The outer wall of the valve stem 13 is provided with a plurality of annular grooves 46 evenly distributed axially, and an O-ring 47 matching it is provided in the annular groove 46. The presence of the O-ring 47 can effectively ensure the sealing between the outer wall of the valve stem 13 and the inner wall of the valve stem hole 12, thereby preventing water leakage.

[0037] The valve stem seat 11 is covered with a protective sleeve 51, and the lower end surface of the protective sleeve 51 is in contact with the upper surface of the inner valve body 7. The lower end of the protective sleeve 51 is covered with a protective cover 52, and the upper inner wall of the protective cover 52 is in contact with the upper surface of the fixed wing 8; the protective cover 52 is provided with a plurality of through holes 53 coaxial with the through hole 49, and the fixing screws 50 pass through the through holes 53, and the lower surface of the head of the fixing screws 50 is in contact with the upper surface of the protective cover 52. The existence of the protective sleeve 51 can effectively protect the valve stem seat 11, and the existence of the protective cover 52 can effectively protect the inner valve body 7 and the plug-in platform 3, so as to avoid the situation in which the plug-in platform 3 and the valve stem seat 11 directly collide with the wall and cause damage when the air circuit control valve is installed.

[0038] A rubber sleeve 54 matching the hidden hole 27 can be disposed in the opening of the upper end of the hidden hole 27 to completely hide the head of the limit screw 30 in the hidden hole 54 .

Claims

1. A quick-insert gas circuit control valve, comprising an outer valve body, characterized in that: The left and right sides of the outer valve body are both provided with air outlet joints that are connected with the internal space thereof; the upper surface of the outer valve body is provided with a plug-in platform; the center of the upper surface of the plug-in platform is provided with a plug-in hole; the center of the bottom of the plug-in hole is provided with an air outlet that is connected with the internal space of the outer valve body; the left side wall of the plug-in platform is provided with an air inlet joint that is connected with the plug-in hole; the plug-in hole is provided with an inner valve body that matches it; the outer wall of the upper end of the inner valve body is provided with a fixed wing that fits with the upper surface of the plug-in platform; the fixed wing is fixed to the plug-in platform by a fixed structure; an opening and closing cavity is provided in the inner valve body; the opening and closing cavity is provided with a matching a matching valve ball; a valve stem seat is provided at the center of the upper surface of the inner valve body; a valve stem hole communicating with the opening and closing cavity is provided at the center of the upper surface of the valve stem seat; a valve stem matching the valve stem hole is provided at the upper end of the valve ball; the upper end of the valve stem passes upward to the outside of the valve stem hole and is provided with a set of handwheels outside the upper end of the valve stem seat; an air inlet is provided on the left side wall of the inner valve body; a left opening and closing hole is provided on the left side wall of the valve ball, and a lower opening and closing hole communicating with the left opening and closing hole is provided on the lower surface of the valve ball; the air inlet joint is communicated with the left opening and closing hole through the air inlet hole; an auxiliary hole is provided at the center of the lower surface of the inner valve body, and the air outlet is communicated with the lower opening and closing hole through the auxiliary hole.

2. A quick-insert gas circuit control valve according to claim 1, characterized in that: The lower inner wall of the valve stem hole is provided with an annular limiting step; the outer wall of the valve stem is provided with an annular limiting part, and the upper surface of the limiting part is in contact with the limiting step; the upper surface of the valve ball is provided with a square slot; the center of the lower end surface of the valve stem is provided with a square head matching the slot; the inner wall of the upper end opening of the valve stem hole is provided with an annular limiting groove; the center of the upper inner wall of the hand wheel is provided with a connecting seat; the center of the lower surface of the connecting seat is provided with a groove, and the upper end of the valve stem seat is located in the groove; the center of the bottom of the groove is provided with a spring groove; the center of the upper surface of the hand wheel is provided with a hidden hole; the bottom of the hidden hole is provided with a connecting hole that is connected with the spring groove, and the upper end of the valve stem is inserted upward into the connecting hole; the center of the upper end surface of the valve stem is provided with a screw hole; a limiting screw is screwed into the screw hole, and the lower surface of the head of the limiting screw is in contact with the bottom of the hidden hole; a set of springs outside the valve stem is provided between the bottom of the spring groove and the bottom of the limiting groove.

3. A quick-insert gas circuit control valve according to claim 2, characterized in that: The diameter of the air inlet hole is larger than the diameter of the valve ball; the inner wall of the main end of the air inlet hole is provided with an annular introduction part; the inner wall of the introduction part is provided with an introduction cone surface which is wider on the left and narrower on the right; the air inlet hole is provided with an embedding groove located on the right side of the introduction part, and the embedding groove is annular; the air inlet hole is provided with an annular limiter; the outer wall of the left end of the limiter is provided with an embedding part matching the embedding groove; the outer wall of the embedding part is provided with an extrusion cone surface which is wider on the left and narrower on the right; the inner wall of the right part of the embedding groove is provided with an auxiliary cone surface which fits the introduction cone surface; A left-shaped retaining portion is extended to the right from the edge of the right-end opening of the inner hole of the limiting member; a left sealing ring is covered on the left retaining portion, and the left end of the valve ball is embedded in the right-end opening of the inner hole of the left sealing ring; a right-shaped right retaining portion is provided on the right inner wall of the opening and closing cavity, and the right retaining portion is coaxial with the left retaining portion; a right sealing ring is covered on the right retaining portion, and the right end of the valve ball is embedded in the left-end opening of the inner hole of the right sealing ring.

4. A quick-insert gas circuit control valve according to claim 3, characterized in that: An elastic notch is arranged on one side of the left portion of the limiting member.

5. The quick-insert gas circuit control valve according to claim 3, characterized in that: The right outer wall of the left clamping portion is provided with an extrusion cone surface which is wider on the left and narrower on the right, and the extrusion cone surface is in contact with the inner wall of the left end opening of the inner hole of the left sealing ring.

6. A quick-insert gas circuit control valve according to claim 3, characterized in that: The auxiliary hole diameter is larger than the valve stem diameter.

7. The quick-insert gas circuit control valve according to claim 2, characterized in that: The outer wall of the valve stem is provided with a plurality of annular grooves evenly distributed in the axial direction; an O-ring matching the annular groove is arranged in the annular groove.

8. The quick-insert gas circuit control valve according to claim 1, characterized in that: The fixing structure comprises a plurality of screw holes evenly arranged on the outer edge of the upper surface of the plug-in platform; the fixing wing is provided with a plurality of through holes coaxial with the screw holes; a fixing screw passes downward through the through hole and is screwed into the screw hole.

9. A quick-insert gas circuit control valve according to claim 8, characterized in that: The valve stem seat is covered with a protective sleeve, and the lower end surface of the protective sleeve is in contact with the upper surface of the inner valve body; the lower end of the protective sleeve is covered with a protective cover, and the upper inner wall of the protective cover is in contact with the upper surface of the fixed wing; the protective cover is provided with a plurality of through holes coaxial with the through holes, and the fixing screws pass through the through holes, and the lower surface of the head of the fixing screws is in contact with the upper surface of the protective cover.

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