A self-repairing check valve for failure of the plain reservoir

Abstract

The present application relates to the technical field of valve structure, specifically to a failure self-repair check valve suitable for plain reservoir, comprising a valve body with a valve cavity, an inlet and an outlet, and a first check structure allowing fluid to flow through the valve cavity only from the inlet, the check valve further comprising a hole plate, a control module and a glue discharging device, the hole plate is arranged in the valve cavity, the control module comprises a positioning unit for positioning the position of the valve body, a humidity sensing unit for real-time monitoring the humidity of the valve cavity, and a control unit for receiving the humidity data collected by the sensing unit, and the control unit controls the glue discharging device to discharge glue to the hole plate when the humidity of the valve cavity reaches a preset threshold value, so as to form a plugging layer for cutting off the valve cavity, and sends the position information of the valve body to a remote monitoring platform. The check valve of the present application can actively take plugging measures and locate the water leakage point when it fails, avoiding continuous water leakage, and facilitating quick positioning of the damaged check valve.

Description

Technical Field

[0001] This invention relates to the field of valve structure technology, specifically to a self-healing check valve suitable for use in plain reservoirs. Background Technology

[0002] Plain reservoirs are important water conservancy infrastructures, and widely employ geomembranes combined with check valves as seepage prevention systems to prevent water infiltration. However, most existing check valves are passive mechanical structures, unable to actively seal in case of failure, relying solely on external intervention. Furthermore, once a check valve fails, manual location of the seepage point and organization of repairs are necessary, which is difficult and time-consuming in the context of the large distribution of plain reservoirs. To address these issues, this invention proposes a self-healing check valve suitable for plain reservoirs. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a self-healing check valve suitable for plain reservoirs. It can take proactive measures to seal and locate the seepage point when it fails, so as to avoid continuous seepage and facilitate quick location of the damaged check valve.

[0004] This invention is achieved through the following technical solution: A self-healing check valve suitable for use in plain reservoirs includes a valve body having a valve cavity, an inlet, and an outlet, and a first check structure that allows fluid to flow through the valve cavity only from the inlet. The check valve also includes an orifice plate, a control module, and a glue discharge device. The orifice plate is disposed in the valve cavity. The control module includes a positioning unit for positioning the valve body, a humidity sensing unit for real-time monitoring of the humidity in the valve cavity, and a control unit for receiving humidity data collected by the sensing unit. When the humidity in the valve cavity reaches a preset threshold, the control unit controls the glue discharge device to discharge glue to the orifice plate to form a sealing layer for cutting off the valve cavity, and sends the position information of the valve body to a remote monitoring platform.

[0005] Optionally, the orifice plate has multiple holes, and the glue discharge device includes a glue bladder, a rotating frame, a moving component, and an electromagnet. The glue bladder is placed between the rotating frame and the moving component, and the glue bladder has a discharge port corresponding to the position of the orifice plate. The rotating frame is rotatably disposed in the valve cavity about an axis X perpendicular to the surface of the orifice plate. The moving component is movable relative to the orifice plate along the direction of the axis X. The moving component is provided with a guide block, and the rotating frame is provided with a spiral guide groove that slides with the guide block. The electromagnet is magnetically attracted to the moving component.

[0006] Optionally, a pressure relief valve is provided at the discharge port.

[0007] Optionally, the portion of the perforated plate without holes in the middle has a protruding connecting part, the rotating frame is rotatably connected to the connecting part, and the moving part has a plug-in part that engages with the connecting part.

[0008] Optionally, the glue outlet includes a glue dispensing tube and a glue application tube, the glue application tube being arranged parallel to the orifice plate, and the glue application tube having multiple glue outlet holes arranged along its length.

[0009] Optionally, the first check structure includes a first check plate and a pressure spring. The outlet of the valve body has a sealing stepped surface. The outlet of the valve body is an exhaust hole disposed around the sealing stepped surface. The first check plate is pressed against the sealing stepped surface by the elastic force of the pressure spring.

[0010] Optionally, the first check structure includes a first check plate and a pressure spring. The outlet of the valve body has a sealing stepped surface. The outlet of the valve body is an exhaust hole disposed around the sealing stepped surface. The first check plate is pressed against the sealing stepped surface by the elastic force of the pressure spring. The electromagnet is fixed on the first check plate.

[0011] Optionally, the positioning unit is a GPS or Beidou positioning unit, used to send fault location information to the data platform via wired or wireless transmission when the humidity in the valve cavity reaches a preset threshold.

[0012] Optionally, the check valve further includes a second check structure that allows fluid entering only from the inlet to flow through the valve cavity, and the humidity sensing unit is disposed between the first check structure and the second check structure.

[0013] Optionally, the second check structure includes a rotating arm and a second check plate. The second check plate is rotatably connected to the valve body through the rotating arm, and the second check plate abuts against the inlet of the valve body under its own weight.

[0014] Compared with the prior art, the present invention provides a self-healing check valve suitable for plain reservoirs, which has the following beneficial effects: 1. The check valve of the present invention includes an orifice plate, a control module and a glue discharge device. When the valve body fails, the control module controls the glue discharge device to discharge glue to the orifice plate to quickly seal the valve body. At the same time, the control module also sends the position information of the valve body to the remote monitoring platform so as to quickly find the leakage point. 2. The glue discharge device of the present invention includes a glue bladder, a rotating frame, a moving part, and an electromagnet. When the valve body leaks water, the control unit sends a start command to the electromagnet to energize it. The electromagnet attracts the moving part to move linearly along the X-axis and squeezes the glue bladder to discharge glue into the orifice plate. At the same time, through the sliding cooperation between the guide block and the spiral guide groove, the linear motion of the moving part is converted into the rotational motion of the rotating frame, which drives the glue discharge port to move along the surface of the orifice plate to apply glue. Compared with fixed-point glue discharge, all holes on the orifice plate can be filled with glue more quickly, improving the sealing efficiency of the orifice plate and realizing the rapid sealing of the leakage point. 3. By fixing the electromagnet to the first check plate, when the glue discharge device discharges glue, the moving parts will also generate a reverse attraction force on the electromagnet. With the help of this reverse attraction force, the first check plate can be firmly pressed at the outlet of the valve body, preventing more water from entering the valve cavity and allowing sufficient time for the glue on the orifice plate to solidify. 4. By placing the humidity sensing unit between the first check structure and the second check structure, under the condition of water leakage when the first check structure fails and the second check structure remains intact, water enters the valve cavity through the failed first check structure. Since the second check structure has normal sealing performance, the water can be completely collected in the valve cavity without leaking outward, so that the humidity sensing unit can quickly capture the humidity changes in the valve cavity. Attached Figure Description

[0015] Figure 1 A schematic diagram of the installation structure of a check valve with the first type of glue discharge device; Figure 2 for Figure 1 A partial structural diagram of a check valve; Figure 3 for Figure 2 A magnified structural diagram at point A; Figure 4 This is a schematic diagram of the control module. Figure 5 A schematic diagram of the installation structure of a check valve with a second type of glue discharge device; Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure at point BB.

[0016] In the diagram: 100, Check valve; 110, Valve body; 111, Inlet; 112, Outlet / vent; 113, Valve chamber; 114, Sealing stepped surface; 120, First check valve structure; 121, First check plate; 122, Pressure spring; 130, Second check valve structure; 131, Rotating arm; 132, Second check plate; 140, Orifice plate; 141, Connecting part; 1410, Slot; 150, Control module; 151, Positioning unit; 152, Humidity. 153. Sensing unit; 154. Control unit; 155. Power supply unit; 156. Wireless transmission unit; 167. Adhesive discharge device; 168. Adhesive bladder; 169. Adhesive flow tube; 160. Adhesive application tube; 1614. Pressure relief valve; 1615. Rotating frame; 1620. Guide groove; 163. Moving parts; 164. Guide block; 165. Insertion part; 166. Electromagnet; 177. Bag breaking needle; 180. Top cover; 198. Upper and lower pressure plates; 200. Geomembrane. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] As described in the background section, most check valves currently used in plain reservoirs are passive mechanical structures that cannot take proactive sealing measures when they fail. They can only rely on external intervention. Moreover, once a check valve fails, it is necessary to manually locate the seepage point and organize maintenance. In the case of a large distribution of plain reservoirs, locating the seepage point is difficult and the maintenance cycle is long.

[0019] To resolve the above issues, please refer to Figures 1 to 6According to an embodiment of the present invention, a self-healing check valve suitable for use in plain reservoirs is provided for use in conjunction with a geomembrane 200. Its main function is to vent air and prevent seepage. The check valve 100 mainly includes a valve body 110 having a valve cavity 113, an inlet 111, and an outlet 112, and a first check structure 120 that only allows fluid entering through the inlet 111 to flow through the valve cavity 113. The first check structure 120 is used to prevent water above the geomembrane 200 from flowing through the valve body 110, thus achieving the purpose of preventing seepage. It also allows gas below the geomembrane 200 to be discharged through the valve body 110 when the air pressure below the geomembrane 200 increases to a certain value, thus achieving the function of venting air. The check valve 100 also includes an orifice plate 140, a control module 150, and a glue discharge device 160. The orifice plate 140 is located in the valve cavity 113 and can be made of PVC material. Gas passing through the valve body 110 can pass through the holes in the orifice plate 140. The control module 150 includes a positioning unit 151, a humidity sensing unit 152, a control unit 153, and a power supply unit 154. The positioning unit 151 is a GPS or Beidou positioning unit, mainly used to locate the position of the valve body 110. The humidity sensing unit 152 is used to monitor the humidity of the valve cavity 113 in real time. The control unit 153 can be a microcontroller, a programmable logic controller, or an application-specific integrated circuit. It is mainly used to receive the humidity data collected by the sensing unit. When the humidity of the valve cavity 113 reaches a preset threshold, the control unit 153 can control the glue discharge device 160 to discharge glue to the orifice plate 140 to form a sealing layer for cutting off the valve cavity 113. The control unit 153 can also transmit the position information of the valve body 110 to a remote monitoring platform via wired or wireless transmission. When transmitting position information wirelessly, the control module 150 also includes a wireless transmission unit 155. The power supply unit 154 can be a button battery to provide power to each power-consuming unit.

[0020] In normal use, the check valve 100 with the above-described structure relies on the first check structure 120 to release air and prevent water leakage. When the valve body 110 is damaged and leaks water, the water level in the valve chamber 113 gradually rises, and the humidity data collected by the humidity sensing unit 152 gradually rises to 100%RH (relative humidity, representing that the probe is completely submerged). The control unit 153 compares the collected data with a preset threshold and determines that the check valve 100 is in a damaged state. It then discharges adhesive to the orifice plate 140 through the control adhesive discharge device 160. The adhesive flows out and gradually covers the surface of the orifice plate 140. After solidification, it forms a dense barrier, completely sealing the valve body 110 and preventing water from continuing to seep down. At the same time, the control module 150 marks the sealed valve body 110 as a leak-sealed state and sends the position information of the valve body 110 to the remote monitoring platform. Compared to existing passive mechanical check valves, this check valve 100 can actively take sealing measures and locate the leakage point when it fails, thus preventing continuous leakage. At the same time, it is convenient to quickly locate the damaged check valve 100.

[0021] In some embodiments, the perforated plate 140 has multiple holes, with the hole diameter preferably such that glue does not flow out excessively along the holes. Compared to a single hole, a multi-hole design is less prone to glue leakage with the same ventilation area. However, the multi-hole design also has drawbacks. Because multiple holes mean a large coverage area on the perforated plate 140, a technical challenge arises in ensuring that the glue discharged from the glue discharge device 160 quickly fills all the holes on the perforated plate 140. To overcome this technical challenge, such as... Figure 1 As shown, a first type of glue discharge device 160 is disclosed. The first type of glue discharge device 160 includes a glue bladder 161, a rotating frame 162, a moving member 163, and an electromagnet 164. The glue bladder 161 is placed between the rotating frame 162 and the moving member 163. The glue bladder 161 has a glue discharge port corresponding to the position of the orifice plate 140. The rotating frame 162 is rotatably disposed in the valve chamber 113 about an axis X perpendicular to the surface of the orifice plate 140. The moving member 163 is movable relative to the orifice plate 140 along the direction of the axis X. The moving member 163 is provided with a guide block 1630. The rotating frame 162 is provided with a spiral guide groove 1620 that slides with the guide block 1630. The guide groove 1620 opened on the side wall of the rotating frame 162 extends spirally along the axis X. In order to reduce the friction between the guide block 1630 and the guide groove 1620, the guide block 1630 can be in the form of a ball bearing that makes rolling contact with the guide groove 1620. Electromagnet 164 and moving part 163 are magnetically attracted to each other. The moving part 163 can be made of iron. In the glue discharge device 160 with this structure, when the valve body 110 leaks, the control unit 153 sends a start command to the electromagnet 164, energizing it. The electromagnet 164 attracts the moving part 163 to move linearly along the X-axis and squeezes the glue sac 161 to discharge glue into the orifice plate 140. Simultaneously, through the sliding engagement of the guide block 1630 and the spiral guide groove 1620, the linear motion of the moving part 163 is converted into the rotational motion of the rotating frame 162, driving the glue discharge port to move along the surface of the orifice plate 140 to apply glue. Compared to fixed-point glue discharge, all holes on the orifice plate 140 can be filled with glue more quickly, improving the sealing efficiency of the orifice plate 140 and achieving rapid sealing of leaks.

[0022] like Figure 3 As shown, in some embodiments, a pressure relief valve 1614 is provided at the glue discharge port. When the glue bladder 161 is not squeezed, the pressure relief valve 1614 remains closed, and the glue discharge port is in a closed state; when the moving part 163 squeezes the glue bladder 161 to reach the preset pressure, the pressure relief valve 1614 automatically opens to realize the glue discharge function.

[0023] like Figure 3As shown, to enable the rotating frame 162 to be rotatably disposed in the valve cavity 113 about an axis X perpendicular to the surface of the orifice plate 140, the moving member 163 is movable relative to the orifice plate 140 along the direction of the axis X. In some embodiments, a connecting portion 141 protrudes from the unperforated portion in the middle of the orifice plate 140, and the rotating frame 162 is rotatably connected to the connecting portion 141. Specifically, the rotating frame 162 and the connecting portion 141 can be rotatably connected by a bearing. The moving member 163 has a plug-in portion 1631 that engages with the connecting portion 141. Specifically, the plug-in portion 1631 has a polygonal prism structure, and a slot 1410 adapted to the shape of the plug-in portion 1631 is provided on the connecting portion 141. Through the plug-in engagement of the plug-in portion 1631 and the connecting portion 141, the rotation of the moving member 163 is restricted, but the movement of the moving member 163 along the direction of the axis X is allowed.

[0024] like Figure 2 As shown, in some embodiments, the glue outlet includes a glue dispensing tube 1611 and a glue application tube 1612. The glue application tube 1612 is arranged parallel to the orifice plate 140, and multiple glue outlet holes are arranged along its length. The glue dispensing tube 1611 is used to connect the glue application tube 1612 to the glue bladder 161. When the glue in the glue bladder 161 is discharged onto the surface of the orifice plate 140 through the glue outlet holes on the glue application tube 1612, the glue application tube 1612 rotates synchronously with the rotating frame 162, evenly smoothing the glue discharged onto the surface of the orifice plate 140, further improving the sealing efficiency and sealing effect of the holes in the orifice plate 140.

[0025] like Figure 5 and Figure 6 As shown, a second type of glue discharge device 160 is disclosed. Unlike the first type of glue discharge device 160, the glue bladder 161 of the second type of glue discharge device 160 adopts a ring structure and is placed at the outer edge of the orifice plate 140. The orifice plate 140 has numerous holes in the middle. The glue discharge device 160 includes a bag-breaking needle 165 driven by a linear drive device. The linear drive device is used to receive the action command of the control unit 153. The linear drive device can be an electric push rod installed in the valve cavity 113. When the valve body 110 leaks water, the control unit 153 controls the linear drive device to move, driving the bag-breaking needle 165 to move. The bag-breaking needle 165 punctures multiple glue outlets in the length direction of the glue bladder 161, and the glue outlets discharge glue to the position with holes in the middle of the orifice plate 140.

[0026] like Figure 1 , Figure 2 and Figure 5As shown, in some embodiments, the first check structure 120 includes a first check plate 121 and a pressure spring 122. The valve body 110 has a sealing stepped surface 114 at its outlet 112. The outlet 112 of the valve body 110 is an exhaust hole 112 disposed around the sealing stepped surface 114. The exhaust hole 112 may also be provided with filter material to prevent impurities in the water from entering the valve cavity 113. The first check plate 121 is pressed against the sealing stepped surface 114 by the elastic force of the pressure spring 122. During normal use, water above the geomembrane 200 can enter the valve cavity 113 through the vent 112. The water pressure presses the first check plate 121 against the sealing step surface 114, preventing further water flow into the valve cavity 113. Meanwhile, gas below the geomembrane 200 can enter the valve cavity 113 through the inlet 111 of the valve body 110. The gas pressure pushes open the first check plate 121 and compresses the pressure spring 122. The gas passing through the valve cavity 113 is then discharged from the valve body 110 through the vent 112. In one embodiment, an inspection port can be provided at the outlet 112 of the valve body 110 for convenient inspection or replacement of components within the valve cavity 113. The inspection port is sealed by a top cover 170 secured by a threaded connection or snap fastener.

[0027] like Figure 1 and Figure 5 As shown, in order to facilitate the installation of the check valve 100, in some embodiments, the check valve 100 is provided with upper and lower pressure plates 180 on its side. After the valve body 110 of the check valve 100 passes through the pre-reserved installation hole on the geomembrane 200, it is clamped onto the geomembrane 200 by the upper and lower pressure plates 180. The pressure plates and the geomembrane 200 can be further fixed and sealed with glue.

[0028] In the above embodiment, the main reason for water leakage in the check valve 100 is the failure of the pressure spring 122 of the first check structure 120. After the pressure spring 122 fails, the squeezing force on the first check plate 121 is insufficient, and it cannot effectively seal the outlet 112 of the valve body 110, resulting in a large amount of water entering the valve cavity 113. During the process of applying adhesive to the orifice plate 140, if the amount of water entering the valve cavity 113 is not controlled, it will be washed away by the strong water flow before the adhesive is completely solidified, resulting in the adhesive failing to seal the orifice plate 140. To solve this problem, such as Figure 2 As shown, in some embodiments, the electromagnet 164 is fixed to the first check plate 121. With this configuration, when the glue discharge device 160 discharges glue, the electromagnet 164 attracts the moving part 163, and the moving part 163 also generates a reverse attraction force on the electromagnet 164. With the help of this reverse attraction force, the first check plate 121 can be firmly pressed against the outlet 112 of the valve body 110, preventing more water from entering the valve cavity 113 and allowing sufficient time for the glue on the orifice plate 140 to solidify.

[0029] like Figure 1 and Figure 5 As shown, in some embodiments, the check valve 100 further includes a second check structure 130 that only allows fluid entering from the inlet 111 to flow through the valve cavity 113, and a humidity sensing unit 152 is disposed between the first check structure 120 and the second check structure 130. In a leaky condition, the first check structure 120 fails while the second check structure 130 remains intact. At this time, water enters the valve cavity 113 through the failed first check structure 120. Since the second check structure 130 has normal sealing performance, the water can be completely collected in the valve cavity 113 without leakage, so that the humidity sensing unit 152 can quickly detect humidity changes in the valve cavity 113.

[0030] like Figure 1 and Figure 5 As shown, in some embodiments, the second check valve structure 130 includes a rotating arm 131 and a second check valve plate 132. The second check valve plate 132 is rotatably connected to the valve body 110 via the rotating arm 131. Under its own weight, the second check valve plate 132 presses against the inlet 111 of the valve body 110. The second check valve plate 132 closes the inlet 111 of the valve body 110 by its own weight. When the water pressure in the valve cavity 113 increases, the water pressure can further press the second check valve plate 132 against the inlet 111 of the valve body 110, preventing water from flowing out of the inlet 111 of the valve body 110. When the air pressure outside the inlet 111 of the valve body 110 increases, the air pressure can easily push open the second check valve plate 132, allowing gas to enter the valve cavity 113 of the valve body 110. In one embodiment, the rotating arm 131 and the valve body 110 are rotatably connected by a rotating shaft, and a torsion spring is provided at the rotatable connection position. The torsion spring can improve the sealing performance of the second check plate 132 to the inlet 111 of the valve body 110.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-healing check valve for failure in plain reservoirs, comprising a valve body (110) having a valve cavity (113), an inlet (111), and an outlet (112), and a first check valve structure (120) that allows fluid entering only from the inlet (111) to flow through the valve cavity (113), characterized in that, The check valve (100) also includes an orifice plate (140), a control module (150), and a glue discharge device (160). The orifice plate (140) is disposed in the valve cavity (113). The control module (150) includes a positioning unit (151) for positioning the valve body (110), a humidity sensing unit (152) for real-time monitoring of the humidity of the valve cavity (113), and a control unit (153) for receiving the humidity data collected by the sensing unit. When the humidity of the valve cavity (113) reaches a preset threshold, the control unit (153) controls the glue discharge device (160) to discharge glue to the orifice plate (140) to form a sealing layer for cutting off the valve cavity (113) and sends the position information of the valve body (110) to a remote monitoring platform.

2. The self-repairing check valve for plain reservoirs according to claim 1, characterized in that: The perforated plate (140) has multiple holes. The glue discharge device (160) includes a glue bladder (161), a rotating frame (162), a moving part (163), and an electromagnet (164). The glue bladder (161) is placed between the rotating frame (162) and the moving part (163). The glue bladder (161) has a glue discharge port corresponding to the position of the perforated plate (140). The rotating frame (162) is rotatably disposed in the valve chamber (113) about an axis X perpendicular to the surface of the perforated plate (140). The moving part (163) is movable relative to the perforated plate (140) along the direction of the axis X. The moving part (163) is provided with a guide block (1630). The rotating frame (162) is provided with a spiral guide groove (1620) that slides with the guide block (1630). The electromagnet (164) is magnetically attracted to the moving part (163).

3. The self-repairing check valve for plain reservoirs according to claim 2, characterized in that: A pressure relief valve (1614) is installed at the discharge port.

4. The self-repairing check valve for plain reservoirs according to claim 2, characterized in that: The perforated plate (140) has a connecting part (141) protruding from the middle part without holes. The rotating frame (162) is rotatably connected to the connecting part (141). The moving part (163) has a plug-in part (1631) that is plugged into the connecting part (141).

5. The self-repairing check valve for plain reservoirs according to claim 2, characterized in that: The glue outlet includes a glue flow tube (1611) and a glue application tube (1612). The glue application tube (1612) is arranged parallel to the orifice plate (140), and multiple glue outlet holes are arranged along the length direction of the glue application tube (1612).

6. The self-repairing check valve for failure applicable to plain reservoirs according to claim 1, characterized in that: The first check structure (120) includes a first check plate (121) and a pressure spring (122). The valve body (110) has a sealing stepped surface (114) at its outlet (112). The outlet (112) of the valve body (110) is an exhaust hole (112) provided around the sealing stepped surface (114). The first check plate (121) presses against the sealing stepped surface (114) by the elastic force of the pressure spring (122).

7. The self-repairing check valve for failure applicable to plain reservoirs according to any one of claims 2 to 5, characterized in that: The first check structure (120) includes a first check plate (121) and a pressure spring (122). The valve body (110) has a sealing stepped surface (114) at its outlet (112). The outlet (112) of the valve body (110) is an exhaust hole (112) provided around the sealing stepped surface (114). The first check plate (121) is pressed against the sealing stepped surface (114) by the elastic force of the pressure spring (122). The electromagnet (164) is fixed on the first check plate (121).

8. The self-repairing check valve for plain reservoirs according to claim 1, characterized in that: The positioning unit (151) is a GPS or Beidou positioning unit (151), which is used to send fault location information to the data platform via wired or wireless transmission when the humidity of the valve cavity (113) reaches a preset threshold.

9. The self-repairing check valve for plain reservoirs according to claim 1, characterized in that: The check valve (100) further includes a second check structure (130) that allows fluid entering from the inlet (111) to flow through the valve chamber (113), and the humidity sensing unit (152) is disposed between the first check structure (120) and the second check structure (130).

10. The self-healing check valve for failure applicable to plain reservoirs according to claim 9, characterized in that: The second check structure (130) includes a rotating arm (131) and a second check plate (132). The second check plate (132) is rotatably connected to the valve body (110) through the rotating arm (131). The second check plate (132) presses against the inlet (111) of the valve body (110) under its own weight.

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