Miniature one-way non-return combination module

Abstract

The utility model relates to a miniature one-way non-return combined module, and belongs to the technical field of fluid control, the miniature one-way non-return combined module comprises a liquid path module, the liquid path module is provided with at least two liquid inlet channels and a liquid outlet channel, the liquid inlet channels are communicated with the liquid outlet channel, and the liquid inlet channels are connected with non-return modules; the liquid inlet end of the non-return module serves as a liquid inlet connector of the non-return combination module, and the liquid outlet end of the liquid path module serves as a liquid outlet connector of the non-return combination module. The application has the effects of reducing the occupied space of the non-return combination structure in the micro-electromechanical system and improving the adaptability of the non-return combination structure in the micro-electromechanical system.

Description

Technical Field

[0001] This application relates to the technical field of fluid control, and particularly to a micro one-way check valve circuit module. Background Art

[0002] In a micro-electromechanical system, it is usually necessary to set up a circuit combining element to manage and control the liquid flow so that the liquid from multiple input ends is output from a single output end. The circuit combining element is generally connected to multiple liquid input ends in the micro-electromechanical system. Since the hydraulic pressure at each liquid input end is different, in order to prevent the liquid from flowing back reversely, it is usually necessary to set up a check valve element to ensure the normal operation of the system. The traditional check valve element is usually installed on the connecting pipeline, and then the connecting pipeline is connected to the circuit combining element. This traditional check valve circuit structure occupies a large space and is difficult to meet the application requirements of the micro-electromechanical system. Summary of the Utility Model

[0003] In order to reduce the space occupied by the check valve circuit structure in the micro-electromechanical system and improve the adaptability of the check valve circuit structure in the micro-electromechanical system, this application provides a micro one-way check valve circuit module.

[0004] A micro one-way check valve circuit module provided by this application adopts the following technical solution:

[0005] A micro one-way check valve circuit module includes a liquid path module. The liquid path module is provided with an inlet liquid channel and an outlet liquid channel. There are at least two inlet liquid channels, and the inlet liquid channels are communicated with the outlet liquid channel. A check valve module is connected to the inlet liquid channel. The inlet end of the check valve module serves as the inlet interface of the check valve circuit module, and the outlet end of the liquid path module serves as the outlet interface of the check valve circuit module.

[0006] By adopting the above technical solution, the liquid enters the liquid path module from the check valve module, and the liquid in multiple inlet liquid channels converges into the same outlet liquid channel for output, thereby forming a liquid circuit combination. Compared with the traditional check valve circuit structure, in this application, the check valve module and the circuit combination module are integrated into a check valve circuit module. Compared with the check valve circuit structure formed by the traditional check valve element, connecting pipeline and circuit combination element, it occupies less space. Moreover, the inlet end of the check valve module serves as the inlet interface of the check valve circuit module and can be directly connected to the element that inputs the liquid, and the outlet end of the liquid path module serves as the outlet interface of the check valve circuit module and can be directly connected to the element that outputs the liquid, which is more convenient for assembly, thereby improving its adaptability in the micro-electromechanical system;

[0007] In the traditional check valve, connecting pipeline and circuit combination element structure, there are more joints and seams. These places are prone to leaks due to imperfections in the manufacturing process or wear during use, resulting in an increased risk of leakage;

[0008] The integrated design makes the check valve circuit structure more compact and precise. Its internal structure can better control the fluid flow and reduce the number of connections and joints. This design can reduce the possibility of leakage because it reduces the potential paths of leakage and improves the sealing performance.

[0009] Optionally, the check valve module includes a check valve unit and an interface unit. The check valve unit is connected to the liquid inlet channel, the interface unit is connected to the liquid inlet end of the check valve unit, and the liquid inlet end of the interface unit serves as the liquid inlet interface of the check valve circuit module.

[0010] By adopting the above technical solution, the interface unit is convenient and fast to connect with the component inputting liquid. The integrated design of the interface unit and the check valve unit forms a quick-connect check valve structure, which is convenient and fast to install in the microelectromechanical system.

[0011] Optionally, the check valve unit includes a check valve housing. One end of the check valve housing is connected to the liquid inlet channel. The check valve housing is provided with a liquid inlet flow channel, a liquid outlet flow channel, and a communicating flow channel. One end of the communicating flow channel is connected to the liquid inlet flow channel, and the other end of the communicating flow channel is connected to the liquid outlet flow channel. An opening and closing member, an elastic member, a connecting member, and a limiting member are arranged in the check valve housing. One end of the elastic member is connected to the opening and closing member, and the other end of the elastic member is connected to the connecting member. The limiting member is fixed at the liquid outlet of the check valve housing to limit the separation of the connecting member, the elastic member, and the opening and closing member from the check valve housing.

[0012] When the liquid inlet of the circuit module is in operation, the liquid pressure pushes the opening and closing member to open the communicating flow channel.

[0013] When the liquid inlet of the circuit module stops, the elastic member drives the opening and closing member to block the communicating flow channel.

[0014] By adopting the above technical solution, when the liquid inlet of the circuit module is in operation, the liquid first flows into the liquid inlet flow channel. The liquid pressure pushes the opening and closing member to open the communicating flow channel. At this time, the elastic member is in a compressed state. The liquid sequentially flows into the communicating flow channel and the liquid outlet flow channel, and finally enters the liquid path module.

[0015] When the liquid inlet of the circuit module stops, the elastic member returns to its natural state and drives the opening and closing member to block the communicating flow channel again, thereby realizing the check valve function of preventing liquid backflow.

[0016] During one-for-one standby operation, in the traditional check valve circuit structure, the liquid entering the circuit component is likely to leak from the connection between the other standby connection pipeline and the circuit component.

[0017] When the check structure of the present application operates in a one - standby mode, the communication flow channel of one check housing is opened, and the liquid flows into the liquid path module. The liquid flowing into the liquid path module can flow into the liquid outlet flow channel of the other check housing. Under the action of the liquid force, the opening and closing member presses more tightly against the communication flow channel of the other check housing, achieving the check function and sealing effect of the standby check unit.

[0018] Optionally, the connection flow channel includes a first flow channel, a second flow channel, and a third flow channel. The first flow channel is connected to the second flow channel, the second flow channel is connected to the third flow channel, the first flow channel is connected to the liquid inlet flow channel, and the third flow channel is connected to the liquid outlet flow channel. The caliber of the first flow channel is smaller than that of the second flow channel, and the caliber of the second flow channel is smaller than that of the third flow channel.

[0019] The opening and closing member includes an opening and closing block and a sealing ring. The sealing ring is sleeved on the opening and closing block. The peripheral surface of the blocking end of the opening and closing block is a conical surface. The blocking end of the opening and closing block is adapted to the first flow channel, and the sealing ring is adapted to the second flow channel.

[0020] By adopting the above - mentioned technical solution, when the communication flow channel is opened, the liquid sequentially passes through the liquid inlet flow channel, the first flow channel, the second flow channel, and the third flow channel, and finally flows out from the liquid outlet flow channel. The conical surface design of the blocking end of the opening and closing block and the adaptation of the opening and closing block to the first flow channel enable the inner wall at the first flow channel of the check housing to be closely attached to the opening and closing block under the action of the elastic element. Moreover, the opening and closing block and the sealing ring cooperate to seal the second flow channel, realizing double - layer sealing and further improving the sealing effect of the check unit.

[0021] Optionally, the opening and closing member further includes a guide rod, and the guide rod is connected to the opening and closing block. The connecting member includes a connecting plate, and the connecting plate is installed in the liquid outlet flow channel. The liquid can flow out of the housing from both sides of the connecting plate. The connecting plate is provided with a guide hole, the guide rod passes through the guide hole, the elastic member includes a spring, one end of the spring is connected to the opening and closing block, the other end of the spring is connected to the connecting plate, and the limiting member is a limiting ring, and the limiting ring is installed in the liquid outlet end of the check housing.

[0022] By adopting the above - mentioned technical solution, the limiting ring plays a limiting role, reducing the situation that the connecting plate, the spring, and the opening and closing block fall out of the check housing from the liquid outlet channel. When the opening and closing block moves to open the communication flow channel, the guide hole plays a guiding role for the guide rod, so that the opening and closing block can move stably along the specified direction without shaking, enabling the liquid to flow evenly between both sides of the opening and closing block and the inner wall of the check housing. When the opening and closing block closes the connecting channel, the opening and closing block can also move stably, avoiding the situation that the opening and closing block deflects and gets stuck in the communication flow channel under the liquid pressure, improving the accuracy and stability of the opening and closing block in closing and opening the communication flow channel.

[0023] Optionally, the connecting plate is threadedly connected to the check valve housing.

[0024] By adopting the above technical solution, the connecting plate is rotated to move it closer to or away from the opening and closing block, so that the spring can be adjusted, and then the liquid opening pressure of the check valve unit can be quickly adjusted.

[0025] Optionally, the liquid inlet end of the check valve housing is threadedly connected to the liquid path module. A first adjusting nut is coaxially fixed to the check valve housing. The connecting unit includes an internal thread chuck, and the internal thread chuck is threadedly connected to the liquid inlet end of the check valve housing. A second adjusting nut is coaxially fixed to the internal thread chuck.

[0026] By adopting the above technical solution, the check valve housing is threadedly connected to the liquid path module, and then the first adjusting nut is clamped and turned by a tool to quickly fix the check valve housing on the liquid path module. The internal thread chuck is threadedly connected to the check valve housing, and then the second adjusting nut is clamped and turned by a tool to quickly fix the internal thread chuck on the check valve housing.

[0027] Optionally, a connection port is provided on one side of the liquid path module. An end cover for closing the connection port is bolted to the liquid path module, and a sealing ring is connected to the end cover.

[0028] By adopting the above technical solution, the connection port has an auxiliary function. For example, the end cover can be opened and the liquid impurities inside the liquid path module can be cleaned through the connection port, or the end cover can be opened and a pressure gauge can be installed at the connection port to monitor the liquid delivery pressure in real time.

[0029] Optionally, galvanized layers are provided on the inner and outer surfaces of the check valve housing and the liquid path module.

[0030] By adopting the above technical solution, the wear-resistant coating makes the check valve housing and the liquid path module wear-resistant and corrosion-resistant, reducing the situation of liquid leakage caused by damage and corrosion of the check valve housing.

[0031] Optionally, the material of the spring is shape memory alloy.

[0032] By adopting the above technical solution, the response speed of the check valve unit can be improved.

[0033] In summary, the present application includes at least one of the following beneficial technical effects:

[0034] 1. Integrate the check valve module and the multiplexing module into a check valve multiplexing module. Compared with the traditional check valve circuit structure formed by check valve components, connecting pipelines, and multiplexing components, it occupies less space. Moreover, the liquid inlet end of the check valve module, as the liquid inlet interface of the multiplexing module, can be directly connected to the component that inputs liquid, and the liquid outlet end of the liquid path module, as the liquid outlet interface of the multiplexing module, can be directly connected to the component that outputs liquid, which is more convenient for assembly, thus improving its adaptability in microelectromechanical systems;

[0035] 2. The integrated design makes the check valve circuit structure more compact and precise. Its internal structure can better control the fluid flow and reduce the number of connections and joints. This design can reduce the possibility of leakage because it reduces the potential paths of leakage and improves the sealing performance;

[0036] 3. When the communication flow channel is opened, the liquid passes through the liquid inlet flow channel, the first flow channel, the second flow channel, and the third flow channel in sequence, and finally flows out from the liquid outlet flow channel. The conical surface design of the blocking end of the opening and closing block and the adaptation of the opening and closing block to the first flow channel enable the inner wall of the first flow channel of the check valve housing to closely fit with the opening and closing block under the action of the elastic element. Moreover, with the cooperation of the opening and closing block and the sealing ring, the second flow channel is sealed, realizing double blocking and further improving the sealing effect of the check valve unit;

[0037] 4. The guide rod cooperates with the guide hole to guide the opening and closing block, avoiding the situation where the opening and closing block deflects and gets stuck in the communication flow channel under the liquid pressure, and improving the accuracy and stability of the opening and closing block to close and open the communication flow channel;

[0038] 5. Rotate the connecting plate to move it closer to or farther away from the opening and closing block, so that the spring can be adjusted, and then the liquid opening pressure of the check valve unit can be quickly adjusted. Description of the Drawings

[0039] Figure 1 is the overall structural schematic diagram of the embodiment of the present application.

[0040] Figure 2 is the structural schematic diagram of the liquid path module and the inside of the check valve unit in the embodiment of the present application.

[0041] Figure 3 is Figure 2 the enlarged schematic diagram of part A in

[0042] Description of reference numerals: 1. Liquid path module; 11. Confluence channel; 12. Connection port; 13. Liquid inlet channel; 14. Liquid outlet channel; 2. Check module; 21. Check unit; 22. Interface unit; 3. End cover; 31. Sealing ring; 4. Check housing; 41. First adjusting nut; 42. Liquid inlet flow channel; 43. Connecting flow channel; 431. First flow channel; 432. Second flow channel; 433. Third flow channel; 44. Liquid outlet flow channel; 5. Opening and closing member; 51. Opening and closing block; 52. Sealing ring; 53. Guide rod; 6. Elastic member; 61. Spring; 7. Connecting member; 71. Connecting plate; 711. Guide hole; 8. Limiting member; 81. Limiting ring; 9. Internal thread chuck; 91. Second adjusting nut. Detailed implementation manners

[0043] The following further elaborates on this application Figures 1-3 in conjunction with the accompanying drawings.

[0044] An embodiment of this application discloses a micro check valve loop module.

[0045] As Figure 1 shown in Figure 2 the figure, the micro check valve loop module includes a liquid path module 1 and two check modules 2. The size of the liquid path module 1 is: length 110 mm, width 90 mm, and height 50 mm. A confluence channel 11 is provided inside the liquid path module 1. A connection port 12 is provided on one side of the liquid path module 1. The connection port 12 communicates with the confluence channel 11. The liquid path module 1 is bolted with an end cover 3. The end cover 3 closes the connection port 12. A sealing ring 31 is embedded on one side of the end cover 3. The sealing ring 31 abuts tightly against the side wall of the liquid path module 1.

[0046] Two liquid inlet channels 13 are provided on the top surface of the liquid path module 1. In other embodiments, the number of liquid inlet channels 13 can be three or more. Both of the two liquid inlet channels 13 communicate with the confluence channel 11. Threads are provided on the two liquid inlet channels 13. One liquid outlet channel 14 is provided on the bottom surface of the liquid path module 1. The liquid outlet channel 14 communicates with the confluence channel 11.

[0047] The check modules 2 correspond to the liquid inlet channels 13 one by one. The check module 2 includes a check unit 21 and an interface unit 22. The check unit 21 is connected to the liquid inlet channel 13. The interface unit 22 is connected to the liquid inlet end of the check unit 21. The liquid inlet end of the interface unit 22 serves as the liquid inlet interface of the check valve loop module, and the liquid outlet end of the liquid path module 1 serves as the liquid outlet interface of the check valve loop module.

[0048] The interface unit 22 facilitates quick connection with the component for inputting liquid. The integrated design of the interface unit 22 and the check valve unit 21 forms a check valve quick-connection structure, which is convenient for quick installation in the microelectromechanical system. Liquid enters the liquid path module 1 through the interface unit 22 and the check valve unit 21. The liquid in multiple liquid inlet channels 13 converges into the converging channel 11 and is output from the liquid outlet channel 14, thus forming a liquid combining path. Compared with the traditional check valve combining path structure, in this application, the interface unit 22, the check valve unit 21, and the liquid path module 1 are integrated into a check valve combining path module. Compared with the check valve combining path structure formed by traditional check valve components, connecting pipelines, and combining path components, it occupies less space. Moreover, the liquid inlet end of the interface unit 22 can be directly connected with the component for inputting liquid as the liquid inlet interface of the combining path module, and the liquid outlet end of the liquid path module 1 can be directly connected with the component for outputting liquid as the liquid outlet interface of the combining path module, which is more convenient for assembly, thereby improving its adaptability in the microelectromechanical system;

[0049] In the traditional structure of check valves, connecting pipelines, and combining path components, there are more connection points and seams. These places are prone to holes or gaps due to imperfections in the manufacturing process or wear during use, resulting in an increased risk of leakage;

[0050] The integrated design makes the check valve combining path structure more compact and precise. Its internal structure can better control fluid flow and reduces the number of connection points and seams. This design can reduce the possibility of leakage because it reduces the potential paths for leakage and improves the sealing performance.

[0051] Such as Figure 2 and Figure 3 , the check valve unit 21 includes a check valve housing 4. The check valve housing 4 is a cylinder. The first adjusting nut 41 is coaxially fixed on the check valve housing 4. One end of the check valve housing 4 extends into the liquid inlet channel 13 and is threadedly connected with the liquid path module 1. The check valve housing 4 is successively provided with a liquid inlet flow channel 42, a communicating flow channel 43, and a liquid outlet flow channel 44 along its length direction. The liquid inlet flow channel 42 is communicated with the communicating flow channel 43, and the communicating flow channel 43 is communicated with the liquid outlet flow channel 44. The inner and outer surfaces of the check valve housing 4 and the liquid path module 1 are provided with galvanized layers.

[0052] The communicating flow channel 43 includes a first flow channel 431, a second flow channel 432, and a third flow channel 433. The first flow channel 431 communicates with the second flow channel 432, and the second flow channel 432 communicates with the third flow channel 433. The first flow channel 431 is a flow channel formed by the inner wall of the conical arc surface of the check valve housing 4. The second flow channel 432 is a flow channel formed by the inner wall of the cylindrical arc surface of the check valve housing 4. The third flow channel 433 is a flow channel formed by the inner wall of the conical arc surface of the check valve housing 4. The maximum diameter of the first flow channel 431 is equal to the diameter of the second flow channel 432. Other diameters of the first flow channel 431 are smaller than the diameter of the second flow channel 432. The diameter of the second flow channel 432 is equal to the minimum diameter of the third flow channel 433. The diameter of the second flow channel 432 is smaller than other diameters of the third flow channel 433.

[0053] A closing and opening member 5, an elastic member 6, a connecting member 7, and a limiting member 8 are arranged in the check valve housing 4;

[0054] In the embodiment of the present application, the closing and opening member 5 includes a closing and opening block 51, a sealing ring 52, and a guide rod 53. One end of the closing and opening block 51 is arranged in a frustum shape. The sealing ring 52 is fastened to the frustum-shaped end of the closing and opening block 51. The frustum-shaped end of the closing and opening block 51 is adapted to the first flow channel 431. The outer peripheral surface of the sealing ring 52 can be closely attached to the inner wall of the second flow channel 432 of the check valve housing 4. The other end of the closing and opening block 51 is connected to the guide rod 53. In other embodiments, the closing and opening member 5 can be a spherical plug, a conical plug, etc.

[0055] In the embodiment of the present application, the elastic member 6 includes a spring 61 made of an alloy memory material. The spring 61 is sleeved on the guide rod 53, and one end of the spring 61 is fixed to the bottom surface of the closing and opening block 51. In other embodiments, the elastic member 6 can also be a spring 61 made of other elastic materials, or an elastic telescopic rod member with elastic reset, etc.;

[0056] In the embodiment of the present application, the connecting member 7 includes a connecting plate 71. The connecting plate 71 is a long strip plate. The connecting plate 71 is provided with a guide hole 711. The guide rod 53 passes through the guide hole 711. One end of the spring 61 away from the closing and opening block 51 is fixed to the connecting plate 71. The inner wall of the liquid outlet flow channel 44 of the check valve housing 4 is provided with threads. Both ends of the connecting plate 71 are located in the liquid outlet flow channel 44 and are threadedly connected to the check valve housing 4. In other embodiments, the connecting member 7 can also include an annular plate. The annular plate is located in the liquid outlet flow channel 44. The annular plate can be clamped in the check valve housing 4 or threadedly connected to the check valve housing 4. The connecting plate 71 is located inside the annular plate and is connected to the inner wall of the annular plate; the connecting member 7 can also be a cross-shaped plate. Under a certain liquid pressure, the flow rate of the liquid outlet flow channel 44 can be controlled according to the designed shape of different connecting members 7.

[0057] In the embodiments of the present application, the limiting member 8 includes a limiting ring 81. The limiting ring 81 is a steel ring. The steel ring is located in the liquid outlet channel 44 and is clamped in the threaded channel of the check valve housing 4. The connecting plate 71 is located between the limiting ring 81 and the opening and closing block 51. In other embodiments, the limiting member 8 may also be a circular plate, a square plate, etc. provided with an opening for liquid to flow out.

[0058] As Figure 2 , the interface unit 22 includes an internal thread chuck 9. The internal thread chuck 9 is threadedly connected to one end of the check valve housing 4 extending out of the liquid path module 1. The internal thread chuck 9 is coaxially fixed with a second adjusting nut 91. In other embodiments, the interface unit 22 may be an external thread chuck and is threadedly connected inside the check valve housing 4.

[0059] Before installing the check valve housing 4, the connecting plate 71 can be rotated to move it closer to or farther away from the opening and closing block 51, so that the spring 61 can be adjusted, and thus the liquid opening pressure of the check valve unit 21 can be quickly adjusted.

[0060] Then threadedly connect the check valve housing 4 to the liquid path module 1, and then use a tool to clamp and turn the first adjusting nut 41 to quickly fix the check valve housing 4 on the liquid path module 1. Threadedly connect the internal thread chuck 9 to the check valve housing 4, and then use a tool to clamp and turn the second adjusting nut 91 to quickly fix the internal thread chuck 9 on the check valve housing 4.

[0061] When the check valve circuit module is feeding liquid, the liquid first flows into the liquid inlet channel 42. The liquid pressure pushes the opening and closing block 51 to open the communication channel 43. At this time, the spring 61 is in a compressed state. The liquid sequentially flows into the communication channel 43 and the liquid outlet channel 44, and finally enters the liquid path module 1;

[0062] When the check valve circuit module stops feeding liquid, the spring 61 returns to its natural state and drives the opening and closing block 51 to block the communication channel 43 again, thereby realizing the check valve function of preventing liquid backflow.

[0063] During one-for-one standby operation, in the traditional check valve circuit structure, the liquid entering the combining element is likely to leak from the connection between the other standby connection pipeline and the combining element;

[0064] In the check valve structure of the present application during one-for-one standby operation, one communication channel 43 of the check valve housing 4 is opened, and the liquid flows into the liquid path module 1. The liquid flowing into the liquid path module 1 can flow into the liquid outlet channel 44 of another check valve housing 4. Under the action of the liquid, the opening and closing block 51 cooperates with the sealing ring 52 to more tightly press against the communication channel 43 of another check valve housing 4, playing the check valve function and sealing effect of the standby check valve unit 21.

[0065] Moreover, when the communication channel 43 is opened, the liquid sequentially passes through the liquid inlet channel 42, the first channel 431, the second channel 432, and the third channel 433, and finally flows out from the liquid outlet channel 44. The conical surface of the blocking end of the opening / closing block 51 is designed, and the opening / closing block 51 is adapted to the first channel 431. Thus, under the action of the spring 61, the inner wall of the first channel 431 of the check valve housing 4 can be closely attached to the opening / closing block 51. Further, with the cooperation of the opening / closing block 51 and the sealing ring 52, the second channel 432 is blocked, realizing double blocking and further improving the sealing effect of the check valve unit 21.

[0066] The limiting ring 81 plays a limiting role, reducing the situation where the connecting plate 71, the spring 61, and the opening / closing block 51 fall out of the check valve housing 4 from the liquid outlet channel 14. When the opening / closing block 51 moves to open the communication channel 43, the guiding hole 711 plays a guiding role for the guiding rod 53, so that the opening / closing block 51 can stably move along the specified direction without shaking, enabling the liquid to uniformly flow through the space between both sides of the opening / closing block 51 and the inner wall of the check valve housing 4. When the opening / closing block 51 closes the communication channel, the opening / closing block 51 can also stably move, avoiding the situation where the opening / closing block 51 deflects and jams in the communication channel 43 under the liquid pressure, and improving the accuracy and stability of the opening / closing block 51 in closing and opening the communication channel 43.

[0067] The implementation principle of the embodiment of the present application is as follows: The check valve module 2 and the liquid path module 1 are integrated into a check valve loop module. Compared with the check valve loop structure formed by traditional check valve elements, connecting pipelines, and loop combining elements, it occupies less space. Moreover, the liquid inlet end of the check valve module 2 can be directly connected to the element that inputs liquid as the liquid inlet interface of the loop combining module, and the liquid outlet end of the liquid path module 1 can be directly connected to the element that outputs liquid as the liquid outlet interface of the loop combining module, which is more convenient for assembly, thereby improving its adaptability in the microelectromechanical system.

[0068] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A micro one-way stop circuit module, characterized in that: It includes a liquid path module (1). The liquid path module (1) is provided with an inlet liquid channel (13) and an outlet liquid channel (14). There are at least two inlet liquid channels (13). The inlet liquid channels (13) are communicated with the outlet liquid channel (14). The inlet liquid channels (13) are connected with a check module (2). The inlet end of the check module (2) serves as the inlet interface of the check circuit module, and the outlet end of the liquid path module (1) serves as the outlet interface of the check circuit module.

2. The micro one-way stop loop module according to claim 1, characterized in that: The check module (2) includes a check unit (21) and an interface unit (22). The check unit (21) is connected with the inlet liquid channel (13). The interface unit (22) is connected with the inlet end of the check unit (21). The inlet end of the interface unit (22) serves as the inlet interface of the check circuit module.

3. The micro one-way stop loop module according to claim 2, wherein: The check unit (21) includes a check housing (4). One end of the check housing (4) is connected with the inlet liquid channel (13). The check housing (4) is provided with an inlet liquid flow channel (42), an outlet liquid flow channel (44) and a communicating flow channel (43). One end of the communicating flow channel (43) is connected with the inlet liquid flow channel (42), and the other end of the communicating flow channel (43) is connected with the outlet liquid flow channel (44). An opening and closing member (5), an elastic member (6), a connecting member (7) and a limiting member (8) are arranged in the check housing (4). One end of the elastic member (6) is connected with the opening and closing member (5), and the other end of the elastic member (6) is connected with the connecting member (7). The limiting member (8) is fixed at the liquid outlet of the check housing (4) to prevent the connecting member (7), the elastic member (6) and the opening and closing member (5) from separating from the check housing (4). When the combined circuit module is inletting liquid, the liquid pressure pushes the opening and closing member (5) to open the communicating flow channel (43). When the combined circuit module stops inletting liquid, the elastic member (6) drives the opening and closing member (5) to block the communicating flow channel (43).

4. The micro one-way stop loop module according to claim 3, characterized in that: The communicating flow channel (43) includes a first flow channel (431), a second flow channel (432) and a third flow channel (433). The first flow channel (431) is connected with the second flow channel (432), the second flow channel (432) is connected with the third flow channel (433), the first flow channel (431) is connected with the inlet liquid flow channel (42), the third flow channel (433) is connected with the outlet liquid flow channel (44). The diameter of the first flow channel (431) is smaller than that of the second flow channel (432), and the diameter of the second flow channel (432) is smaller than that of the third flow channel (433). The opening and closing member (5) includes an opening and closing block (51) and a sealing ring (52). The sealing ring (52) is sleeved on the opening and closing block (51). The peripheral surface of the blocking end of the opening and closing block (51) is a conical surface. The blocking end of the opening and closing block (51) is adapted to the first flow channel (431), and the sealing ring (52) is adapted to the second flow channel (432).

5. The micro one-way stop loop module according to claim 4, characterized in that: The opening and closing member (5) further includes a guide rod (53), the guide rod (53) is connected to the opening and closing block (51), the connecting member (7) includes a connecting plate (71), the connecting plate (71) is installed in the liquid outlet channel (44), liquid can flow out of the check valve housing (4) from both sides of the connecting plate (71), the connecting plate (71) is provided with a guide hole (711), the guide rod (53) passes through the guide hole (711), the elastic member (6) includes a spring (61), one end of the spring (61) is connected to the opening and closing block (51), the other end of the spring (61) is connected to the connecting plate (71), the limiting member (8) is a limiting ring (81), and the limiting ring (81) is installed in the liquid outlet end of the check valve housing (4).

6. The micro one-way stop loop module according to claim 5, wherein: The connecting plate (71) is threadedly connected to the check valve housing (4).

7. The micro one-way stop loop module according to any one of claims 3-5, characterized in that: The liquid inlet end of the check valve housing (4) is threadedly connected to the liquid path module (1), the check valve housing (4) is coaxially fixed with a first adjusting nut (41), the interface unit (22) includes an internal thread chuck (9), the internal thread chuck (9) is threadedly connected to the liquid inlet end of the check valve housing (4), and the internal thread chuck (9) is coaxially fixed with a second adjusting nut (91).

8. The micro one-way check loop module according to any one of claims 1-5, characterized in that: One side of the liquid path module (1) is provided with a connection port (12), the liquid path module (1) is bolted with an end cover (3) for closing the connection port (12), and the end cover (3) is connected with a sealing ring (31).

9. The micro one-way stop loop module according to any one of claims 3-5, characterized in that: The inner and outer surfaces of the check valve housing (4) and the liquid path module (1) are provided with galvanized layers.

10. The micro one-way stop loop module according to claim 5, wherein: The material of the spring (61) is a shape memory alloy.

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