A stable connection type valve

Abstract

This application discloses a stable connection type connecting valve, relating to the field of solenoid valve technology; it includes several first solenoid valve modules connected side by side along a first direction; each first solenoid valve module includes a coil frame, a first coil assembly, and a first air nozzle; a first connector and a first connector seat are provided on the first coil frame, and the first connector of the first solenoid valve module is adapted to be inserted into the first connector seat of an adjacent first solenoid valve module; the first connector and the first connector seat of the same solenoid valve module form a communicating airflow channel; the first connector has a first boss portion and a second boss portion formed on the first boss portion; the first connector seat has a first receiving groove adapted to accommodate the first connector; a locking block is provided on the outer peripheral wall of the first boss portion, and a locking groove adapted to the locking block is formed on the outer peripheral wall of the first connector seat; this solution effectively solves the problem of air leakage caused by loosening in traditional connecting valves.

Description

Technical Field

[0001] This application relates to the field of solenoid valve technology, and in particular to a stable connection type connecting valve. Background Technology

[0002] Solenoid valves, as core actuators in pneumatic control systems, are widely used in industrial automation equipment, medical devices, automotive electronics, smart homes, and precision instruments. Their main function is to control the flow of air through electromagnetic signals, thereby achieving precise actuation of downstream pneumatic actuators (such as cylinders and grippers). In practical applications, a single solenoid valve often cannot meet the control requirements of complex pneumatic systems. Therefore, the industry commonly uses a method of splicing multiple solenoid valve modules to form "connected valves" to achieve synchronous control and coordinated action of multi-path airflow, improving system integration and space utilization.

[0003] Existing multi-electrode valve modules typically use bolt fastening, simple clips, or adhesive bonding for connection. This method is cumbersome, requiring individual alignment of holes or adjustment of clips, resulting in low assembly efficiency. Furthermore, under prolonged exposure to vibration, pressure fluctuations, or temperature changes, the connection structure is prone to loosening, leading to increased gaps in the airflow channels between adjacent modules and compressed air leakage. This not only causes pressure loss in the pneumatic system, reducing the accuracy and response speed of the actuators, but can also generate noise due to leaking gas and even cause equipment malfunctions. Utility Model Content

[0004] The purpose of this application is to provide a stable connection type valve to solve at least one of the above-mentioned technical problems.

[0005] To address the aforementioned technical problems, this application provides a stable connection type valve, comprising a plurality of first solenoid valve modules connected side-by-side along a first direction; each first solenoid valve module includes a first coil frame, a first coil assembly, and a first air nozzle; a first connector and a first connector seat are provided on the first coil frame, the first connector of the first solenoid valve module being adapted to be inserted into the first connector seat of an adjacent first solenoid valve module; the first connector and the first connector seat of the same solenoid valve module form a communicating airflow channel; the first connector has a first boss portion and a second boss portion formed on the first boss portion, the end of the second boss portion having a through hole communicating with the airflow channel; the first connector seat has a first receiving groove adapted to accommodate the first connector; A locking block is provided on the outer peripheral wall of the first protrusion, and a locking groove adapted to the locking block is formed on the outer peripheral wall of the first insertion seat. In the above implementation process, the first connector on the first coil frame and the first connector of the adjacent module form a precise "boss-receiving groove" fit structure. The locking block on the outer periphery of the first boss and the locking groove on the outer periphery of the first connector constitute a mechanical lock. Compared with existing bolt fastening or simple buckles, this structure can achieve quick insertion without additional tools. Moreover, the interference fit between the locking block and the locking groove can effectively resist the influence of working conditions such as vibration and air pressure fluctuations. Even in the environment of continuous vibration in the vehicle, it can prevent the connection structure from loosening and ensure long-term stable docking of the module. It effectively solves the air leakage problem caused by loosening of traditional valves. In addition, the design of several first solenoid valve modules connected side by side along the first direction can flexibly adjust the number of modules according to the actual passage requirements, taking into account both integration and expandability. It is suitable for multi-pass pneumatic systems without the need to replace the entire valve assembly, reducing equipment upgrade costs.

[0006] Preferably, the first coil frame is further provided with a first air guide pipe that communicates with the airflow channel; It also includes a base, on which the first solenoid valve module is mounted; A first limiting groove is provided on the side wall of the base, and the first air guide tube is limited within the first limiting groove; In the above implementation process, the first air guide tube is used to achieve air intake, and the first limiting groove on the side wall of the base forms a rigid limit on the first air guide tube, improving assembly stability. In this solution, the air guide tube only needs to be embedded in the first limiting groove to complete the positioning, which effectively improves the accuracy and convenience of assembly, takes into account both "efficient assembly" and "stable operation", and is highly practical.

[0007] Preferably, it also includes a second solenoid valve module disposed on the base, the second solenoid valve module including a second coil frame, a second coil assembly and a second air nozzle; the second coil frame is provided with a second plug-in seat, and the second plug-in seat is formed with a second receiving groove suitable for accommodating the first air nozzle; In the above implementation process, the second receiving groove of the second connector is specifically adapted to the first air nozzle, forming a precise "nozzle-receiving groove" fit: the size of the receiving groove is highly matched with the outer circumference of the first air nozzle, ensuring no radial offset after the air nozzle is inserted; at the same time, this structure does not require an additional sealing joint, directly constructing a sealing foundation through the tight fit between the air nozzle and the receiving groove, reducing weak points in the seal, and with the subsequent possible design of sealing rings, the gas leakage rate can be controlled to an extremely low level. In addition, this design simplifies the module docking process: the second solenoid valve module is directly mounted on the base, sharing the same installation reference as the first solenoid valve module, eliminating the need for repeated manual adjustments during docking, effectively improving assembly efficiency, and in later maintenance, the second solenoid valve module can be disassembled and replaced separately without disassembling the entire connecting valve, reducing maintenance costs and downtime.

[0008] Preferably, the system further includes a plurality of third solenoid valve modules disposed on the base. Each third solenoid valve module includes a third coil frame, a third coil assembly, and a third air nozzle. A third connector and a third plug are provided on the third coil frame. The structure of the third connector is the same as that of the first connector, and the structure of the third plug is the same as that of the first plug. The plurality of third solenoid valve modules are connected through the third connector and the third plug. A second air guide tube is provided on the third coil frame, and the structure of the second air guide tube is the same as that of the first air guide tube. In the above implementation process, the first solenoid valve module and the second solenoid valve module can be understood as the two combined to form a module, while the connection of multiple third solenoid valve modules can be understood as forming another module, which can also be connected to the module formed by the first solenoid valve module. The third solenoid valve module is similar in structure to the first solenoid valve module, the difference being that after the first solenoid valve module and the second solenoid valve module are connected, the gas is partially discharged from the second solenoid valve module, while the third solenoid valve module has its own independent gas discharge position.

[0009] Preferably, a plurality of positioning blocks are spaced apart on the base, and the interval between adjacent positioning blocks forms a positioning groove; the two sides of the first coil frame, the second coil frame, or the third limiting member are limited between two adjacent positioning blocks; In the above implementation process, this solution sets positioning blocks and positioning grooves in the base, providing a "precise positioning and reliable limiting" installation foundation for the first, second, and third solenoid valve modules; the positioning grooves formed by adjacent positioning blocks form rigid limiting on both sides of the coil frame, so that each module can only be installed along the direction of the positioning groove during assembly, without the need for manual visual alignment; in terms of structural stability and life protection, the positioning blocks can disperse the external forces and vibration impacts on the modules; at the same time, the positioning grooves keep adjacent modules at a fixed distance, completely eliminating mechanical interference caused by misalignment between modules; protecting the normal reciprocating motion of the solenoid valve core and extending the service life of the solenoid valve.

[0010] Preferably, a plurality of limiting blocks are provided at intervals on the base, and the interval between adjacent limiting blocks forms a second limiting groove; the second air nozzle or the third air nozzle is limited within the second limiting groove; In the above process, the second limiting groove forms a circumferential limit on the air nozzle, preventing it from moving away from its axial direction during vibration. The fixing effect of the limiting groove can prevent the air nozzle from repeatedly shifting. Together with the positioning block, it achieves double limiting and ensures the stability of the solenoid valve assembly.

[0011] Preferably, a first sealing ring is provided on the outer peripheral wall of the first air nozzle; In the above implementation process, the first sealing ring can fill the tiny gap between the first air nozzle and the mating component (such as the second receiving groove) to form an "interference seal". Compared with the hard contact mating without a sealing ring, the sealing effect is improved by more than 80%, which can effectively prevent high-pressure gas from leaking from the mating surface. In addition, the first sealing ring can also reduce the direct friction between the air nozzle and the mating component. When the air nozzle is inserted or pulled out of the receiving groove, the sealing ring can play a lubricating role, reduce the insertion and extraction resistance, facilitate the assembly and disassembly of the module, and at the same time avoid wear caused by friction between the metal air nozzle and the receiving groove, protect the flatness of the mating surface, extend the service life of the air nozzle and the connector, and reduce the frequency of later maintenance and replacement.

[0012] Preferably, a second sealing ring is fitted on the outer peripheral wall of the first boss.

[0013] Preferably, a first groove is formed on the third air nozzle, and a first noise-reducing pad is provided in the first groove; In the above implementation process, the first sound-absorbing pad in this solution uses a porous sound-absorbing material (such as polyurethane foam or porous ceramic) or an elastic damping material. When the third air nozzle performs a venting action, the high-speed airflow impacts the sound-absorbing pad. The sound-absorbing pad reduces noise in the following two ways: First, the porous structure can disperse the airflow into small airflows, reducing the eddy noise generated by airflow turbulence; second, the elastic material can absorb the vibration sound waves generated by the airflow impact, weakening the noise propagation energy. The first groove forms a precise positioning for the first sound-absorbing pad, ensuring that the sound-absorbing pad completely covers the venting channel of the third air nozzle. This solution specifically addresses the pain point of existing connecting valves, namely, "the solenoid valve has high venting noise and is not suitable for noise-sensitive scenarios." The technical effect focuses on balancing noise reduction performance with airflow efficiency, expanding the applicability of connecting valves.

[0014] Preferably, a second groove is formed on the second coil frame, and a vent is provided at the bottom of the second groove; a second sound-dampening pad is provided inside the second groove; In the above implementation process, in terms of comprehensive noise reduction, the vent of the second coil frame is another major noise source when the solenoid valve is turned on and off (which is superimposed on the vent noise of the air nozzle). The second soundproof pad directly covers the vent, which can specifically absorb the vent noise of this part.

[0015] Compared with the prior art, the beneficial effects of this application are as follows: In this solution, the first connector on the first coil frame and the first connector of the adjacent module form a precise "boss-receiving groove" fitting structure. The locking block on the outer periphery of the first boss and the locking groove on the outer periphery of the first connector constitute a mechanical lock. Compared with the existing bolt fastening or simple buckle, this structure can achieve quick insertion without additional tools. Moreover, the interference fit between the locking block and the locking groove can effectively resist the influence of working conditions such as vibration and air pressure fluctuations. Even in the environment of continuous vibration in the vehicle, it can prevent the connection structure from loosening and ensure the long-term stable connection of the module, effectively solving the air leakage problem caused by loosening of traditional valves. In addition, the design of several first solenoid valve modules connected side by side along the first direction can flexibly adjust the number of modules according to the actual passage requirements, taking into account both integration and expandability. It is suitable for multi-pass pneumatic systems, without the need to replace the entire valve assembly, reducing equipment upgrade costs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of one embodiment of this application; Figure 2 This is a schematic diagram of the exploded structure of one embodiment of this application; Figure 3 This is a schematic diagram of the overall structure of one embodiment of this application; Figure 4 This is a schematic diagram of the overall structure of one embodiment of this application; Figure 5 This is an exploded structural diagram of an embodiment of this application; Figure 6 This is a schematic diagram of the structure of the base according to one embodiment of this application; Wherein: 10, First Solenoid Valve Module; 11, First Coil Frame; 12, First Coil Assembly; 13, First Air Nozzle; 131, First Sealing Ring; 14, First Plug-in Socket; 141, First Boss; 1411, Locking Block; 142, Second Boss; 1422, Through Hole; 15, First Plug-in Connector; 151, Slot; 16, First Air Guide Pipe; 20, Second Solenoid Valve Module; 21, Second Coil Frame; 22, Second Coil Assembly; 23, Second Air Nozzle; 24, Second Groove; 241, Second Silent Pad; 25, Second Plug-in Socket; 30, Base; 31, First Limiting Groove; 32, Positioning Block; 33, Limiting Block; 40, Third Solenoid Valve Module; 41, Third Coil Frame; 42, Third Coil Assembly; 43, Third Air Nozzle; 431, First Silent Pad; C1, First direction. Detailed Implementation

[0018] The following drawings disclose several embodiments of this application. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit this application. That is, in some embodiments of this application, these practical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0019] It should be noted that all directional indications in the embodiments of this application, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indication will also change accordingly.

[0020] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit this application. They are merely used to distinguish components or operations described using the same technical terms and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0021] To further understand the utility model content, features, and effects of this application, the following embodiments are provided, and detailed descriptions are given below in conjunction with the accompanying drawings: Example

[0022] Existing multi-electrode valve modules typically use bolt fastening, simple clips, or adhesive bonding for connection. This method is cumbersome, requiring individual alignment of holes or adjustment of clips, resulting in low assembly efficiency. Furthermore, under prolonged exposure to vibration, pressure fluctuations, or temperature changes, the connection structure is prone to loosening, leading to increased gaps in the airflow channels between adjacent modules and compressed air leakage. This not only causes pressure loss in the pneumatic system, reducing the accuracy and response speed of the actuators, but may also generate noise due to leaking gas and even cause equipment malfunctions. To address these technical problems, this embodiment provides the following technical solution: For details, please see Figure 1-6 This embodiment provides a stable connection type valve, including a plurality of first solenoid valve modules 10 connected side by side along a first direction; the first solenoid valve module 10 includes a first coil frame 11, a first coil assembly 12 and a first air nozzle 13; a first plug 15 and a first plug seat 14 are provided on the first coil frame 11, and the first plug 15 of the first solenoid valve module is adapted to be inserted into the first plug seat 14 of an adjacent first solenoid valve module; the first plug 15 and the first plug seat 14 of the same solenoid valve module form a communicating airflow channel; the first plug 15 is formed with a first boss 141 and a second boss 142 formed on the first boss 141, and the end of the second boss 142 is formed with a through hole 1422 communicating with the airflow channel; the first plug seat 14 is formed with a first receiving groove adapted to accommodate the first plug 15; Furthermore, a locking block 1411 is provided on the outer peripheral wall of the first boss 141, and a locking groove 151 adapted to the locking block 1411 is formed on the outer peripheral wall of the first plug-in seat 14. In the above solution, the first connector 15 on the first coil frame 11 and the first connector 14 of the adjacent module form a precise "boss-receiving groove" fit structure. The locking block 1411 on the outer periphery of the first boss 141 and the locking groove 151 on the outer periphery of the first connector 14 form a mechanical lock. Compared with the existing bolt fastening or simple buckle, this structure can achieve quick insertion without additional tools. Moreover, the interference fit between the locking block 1411 and the locking groove 151 can effectively resist the influence of working conditions such as vibration and air pressure fluctuations. Even in the environment of continuous vibration in the vehicle, it can prevent the connection structure from loosening and ensure the long-term stable connection of the module. It completely solves the problem of airflow channel misalignment caused by loosening of traditional valves. In addition, the design of several first solenoid valve modules 10 connected side by side along the first direction can flexibly adjust the number of modules according to the actual passage requirements, taking into account both integration and expandability. It is suitable for multi-pass pneumatic systems, without the need to replace the entire valve assembly, reducing equipment upgrade costs.

[0023] It should be noted that the working principle of the solenoid valve module itself is a relatively mature technology in the existing technology. Therefore, this solution will not elaborate on the details of each component and working principle. However, it is understood that this will not affect the understanding of the solution as a whole by those skilled in the art.

[0024] Specifically, a first air guide pipe 16 connected to the airflow channel is also provided on the first coil frame 11; Furthermore, it also includes a base 30, on which the first solenoid valve module 10 is disposed; Specifically, a first limiting groove 31 is provided on the side wall of the base 30, and the first air guide tube 16 is limited within the first limiting groove 31; In the above scheme, the first air guide pipe 16 is used to realize air intake, and the first limiting groove 31 on the side wall of the base 30 forms a rigid limit on the first air guide pipe 16, which improves the assembly stability. In this scheme, the air guide pipe only needs to be embedded in the first limiting groove 31 to complete the positioning, which effectively improves the accuracy and convenience of assembly, takes into account both "efficient assembly" and "stable operation", and is highly practical.

[0025] For details, please see Figure 1-2 It also includes a second solenoid valve module 20 disposed on the base 30. The second solenoid valve module 20 includes a second coil frame 21, a second coil assembly 22 and a second air nozzle 23. The second coil frame 21 is provided with a second plug-in seat 25, and a second receiving groove suitable for accommodating the first air nozzle 13 is formed on the second plug-in seat 25. In the above scheme, the second receiving groove of the second connector 25 is specifically adapted to the first air nozzle 13, forming a precise "nozzle-receiving groove" fit: the size of the receiving groove is highly matched with the outer circumferential size of the first air nozzle 13, ensuring no radial offset after the air nozzle is inserted; at the same time, this structure does not require an additional sealing joint, directly constructing a sealing foundation through the tight fit between the air nozzle and the receiving groove, reducing weak points in the seal, and with the subsequent possible sealing ring design, the gas leakage rate can be controlled to an extremely low level. In addition, this design simplifies the module docking process: the second solenoid valve module 20 is directly mounted on the base 30, sharing the same installation reference with the first solenoid valve module 10, eliminating the need for repeated manual adjustments during docking, effectively improving assembly efficiency, and in later maintenance, the second solenoid valve module 20 can be disassembled and replaced separately without disassembling the entire valve, reducing maintenance costs and downtime.

[0026] For details, please see Figure 4-5It also includes several third solenoid valve modules 40 mounted on the base 30. Each third solenoid valve module 40 includes a third coil frame 41, a third coil assembly 42, and a third air nozzle 43. A third connector and a third plug are provided on the third coil frame 41. The structure of the third connector is the same as that of the first connector 14, and the structure of the third plug is the same as that of the first plug 15. Several third solenoid valve modules 40 are connected through the third connector and the third plug. A second air guide tube is provided on the third coil frame 41. The structure of the second air guide tube is the same as that of the first air guide tube 16. In the above scheme, the first solenoid valve module 10 and the second solenoid valve module 20 can be understood as the two combined to form a module, while the connection of multiple third solenoid valve modules 40 can be understood as forming another module, which can also be connected to the module formed by the first solenoid valve module 10. The third solenoid valve module 40 is structurally similar to the first solenoid valve module 10, the difference being that after the first solenoid valve module 10 and the second solenoid valve module 20 are connected, the gas is partially discharged from the second solenoid valve module 20, while the third solenoid valve module 40 has its own independent gas discharge position.

[0027] For details, please see Figure 6 A plurality of positioning blocks 32 are provided at intervals on the base 30, and the interval between adjacent positioning blocks 32 forms a positioning groove; the two sides of the first coil frame 11 or the second coil frame 21 or the third limiting member are limited between two adjacent positioning blocks 32. In the above solution, positioning blocks 32 and positioning grooves are set in the base 30, providing a "precise positioning and reliable limiting" installation foundation for the first, second and third solenoid valve modules 40; the positioning grooves formed by adjacent positioning blocks 32 form rigid limiting on both sides of the coil frame, so that each module can only be installed along the direction of the positioning groove during assembly, without the need for manual visual alignment; in terms of structural stability and life protection, positioning blocks 32 can disperse the external forces and vibration impacts on the modules; at the same time, the positioning grooves keep adjacent modules at a fixed distance, completely eliminating mechanical interference caused by misalignment between modules; protecting the normal reciprocating motion of the solenoid valve core and extending the service life of the solenoid valve.

[0028] Specifically, a number of limiting blocks 33 are spaced apart on the base 30, and the interval between adjacent limiting blocks 33 forms a second limiting groove; the second air nozzle 23 or the third air nozzle 43 is limited within the second limiting groove; In the above scheme, the second limiting groove forms a circumferential limit on the air nozzle to prevent it from moving away from its axis during vibration. The fixing effect of the limiting groove can prevent the air nozzle from repeatedly shifting. Together with the positioning block 32, it achieves double limiting and ensures the stability of the solenoid valve assembly.

[0029] For details, please see Figure 2 A first sealing ring 131 is provided on the outer peripheral wall of the first air nozzle 13; In the above solution, the first sealing ring 131 can fill the tiny gap between the first air nozzle 13 and the mating component (such as the second receiving groove) to form an "interference seal". Compared with the hard contact mating without a sealing ring, the sealing effect is improved by more than 80%, which can effectively prevent high-pressure gas from leaking from the mating surface. In addition, the first sealing ring 131 can also reduce the direct friction between the air nozzle and the mating component. When the air nozzle is inserted or pulled out of the receiving groove, the sealing ring can play a lubricating role, reduce the insertion and extraction resistance, facilitate the disassembly and assembly of the module, and at the same time avoid wear caused by friction between the metal air nozzle and the receiving groove, protect the flatness of the mating surface, extend the service life of the air nozzle and the plug, and reduce the frequency of later maintenance and replacement.

[0030] For further details, please see Figure 5 A second sealing ring is provided on the outer peripheral wall of the first boss 141; it is understood that the second sealing ring has a similar function to the first sealing ring 131.

[0031] For details, please see Figure 3 A first groove is formed on the third air nozzle 43, and a first noise-reducing pad 431 is provided in the first groove; In the above solution, the first sound-absorbing pad 431 is made of porous sound-absorbing material (such as polyurethane foam or porous ceramic) or elastic damping material. When the third air nozzle 43 performs the venting action, the high-speed airflow impacts the sound-absorbing pad. The sound-absorbing pad reduces noise in the following two ways: First, the porous structure can disperse the airflow into small airflows, reducing the eddy noise generated by airflow turbulence; second, the elastic material can absorb the vibration sound waves generated by the airflow impact, weakening the noise propagation energy. The first groove forms a precise position for the first sound-absorbing pad 431, ensuring that the sound-absorbing pad completely covers the venting channel of the third air nozzle 43. This solution specifically addresses the pain point of existing connecting valves, namely "the solenoid valve has large venting noise and is not suitable for noise-sensitive scenarios." The technical effect focuses on balancing noise reduction performance with airflow efficiency, expanding the applicability of connecting valves.

[0032] Specifically, a second groove 24 is formed on the second coil frame 21, and a vent is provided at the bottom of the second groove 24; a second sound-absorbing pad 241 is provided inside the second groove 24. In the above solution, in terms of overall noise reduction, the vent of the second coil frame 21 is another major noise source when the solenoid valve is switched on and off (which is superimposed on the vent noise of the air nozzle). The second soundproof pad 241 directly covers the vent, which can specifically absorb the vent noise of this part.

[0033] The above description is merely a preferred embodiment of this application and is not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application shall fall within the scope of the technical solution of this application.

Claims

1. A stable connection type connecting valve, characterized in that: The system includes several first solenoid valve modules connected side-by-side along a first direction. Each first solenoid valve module includes a first coil frame, a first coil assembly, and a first air nozzle. A first connector and a first connector socket are provided on the first coil frame. The first connector of the first solenoid valve module is adapted to be inserted into the first connector socket of an adjacent first solenoid valve module. The first connector and the first connector socket of the same solenoid valve module form a communicating airflow channel. The first connector has a first boss portion and a second boss portion formed on the first boss portion. The end of the second boss portion has a through hole communicating with the airflow channel. The first connector socket has a first receiving groove adapted to accommodate the first connector. A locking block is provided on the outer peripheral wall of the first protrusion, and a locking groove adapted to the locking block is formed on the outer peripheral wall of the first insertion seat.

2. The stable connection type connecting valve according to claim 1, characterized in that: The first coil frame is also provided with a first air guide pipe that communicates with the airflow channel; It also includes a base, on which the first solenoid valve module is mounted; A first limiting groove is provided on the side wall of the base, and the first air guide tube is limited to the first limiting groove.

3. The stable connection type connecting valve according to claim 2, characterized in that: It also includes a second solenoid valve module disposed on the base. The second solenoid valve module includes a second coil frame, a second coil assembly and a second air nozzle. The second coil frame is provided with a second plug-in seat, and the second plug-in seat has a second receiving groove suitable for accommodating the first air nozzle.

4. The stable connection type connecting valve according to claim 3, characterized in that: It also includes several third solenoid valve modules disposed on the base. Each third solenoid valve module includes a third coil frame, a third coil assembly, and a third air nozzle. A third connector and a third plug are provided on the third coil frame. The structure of the third connector is the same as that of the first connector, and the structure of the third plug is the same as that of the first plug. Several third solenoid valve modules are connected through the third connector and the third plug. A second air guide tube is provided on the third coil frame. The structure of the second air guide tube is the same as that of the first air guide tube.

5. The stable connection type connecting valve according to claim 4, characterized in that: A plurality of positioning blocks are spaced apart on the base, and the spacing between adjacent positioning blocks forms a positioning groove; the two sides of the first coil frame, the second coil frame, or the third limiting member are limited between two adjacent positioning blocks.

6. The stable connection type connecting valve according to claim 4, characterized in that: A plurality of limiting blocks are spaced apart on the base, and the interval between adjacent limiting blocks forms a second limiting groove; the second or third air nozzle is limited within the second limiting groove.

7. The stable connection type connecting valve according to claim 4, characterized in that: A first sealing ring is provided on the outer peripheral wall of the first air nozzle.

8. The stable connection type connecting valve according to claim 4, characterized in that: A second sealing ring is fitted on the outer peripheral wall of the first boss.

9. The stable connection type connecting valve according to claim 4, characterized in that: A first groove is formed on the third air nozzle, and a first noise-reducing pad is provided in the first groove.

10. The stable connection type connecting valve according to claim 4, characterized in that: A second groove is formed on the second coil frame, and a vent is provided at the bottom of the second groove; a second noise-reducing pad is provided inside the second groove.

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