High-pressure high-sealing long-service-life check valve

Abstract

The invention relates to the technical field of check valves, in particular to a high-pressure high-sealing long-service-life check valve which comprises a device body, a valve clack used for controlling liquid is arranged in the device body, a valve seat corresponding to the valve clack is further arranged on the inner wall of the device body, and a hinge plate is fixedly connected to the side surface of the valve clack. The upper end of the hinged plate is hinged to the inner wall of the device body, a limiting mechanism is arranged in the device body and comprises a limiting plate, a fitting gap is accurately filled through a rubber ring, a high-pressure medium leakage channel is blocked from the physical level, a flexible material of the limiting plate can adapt to micro displacement under the vibration working condition, and sealing failure caused by rigid fitting is avoided. The limiting mechanism drives a limiting plate to be actively locked through a motor, due to the active locking and flexible compensation design of the valve, the valve can cope with various complex working conditions such as temperature fluctuation, pipeline vibration and medium impact, the sealing performance is stable and consistent, and abnormal system pressure, process medium waste or potential safety hazards caused by sealing failure are effectively avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of check valves, in particular to a high-pressure high-sealing high-life check valve. BACKGROUND

[0002] A check valve is an automatic valve installed in a fluid pipeline, and its core function is to allow fluid to flow in one direction and prevent reverse flow. It does not require external driving force when working, and relies on the pressure of the fluid itself to open the valve. When the fluid flows forward, the pressure pushes the valve disc away from the valve seat to form a flow passage. When the fluid tries to flow in the opposite direction, the valve disc closes the valve seat under the action of reverse pressure or its own gravity, cutting off the passage. It can prevent equipment damage, system pressure fluctuations and other problems caused by reverse flow of medium. It is suitable for water, steam, gas, oil and other fluid media. When installed, the pipeline flow direction should be marked according to the flow direction of the medium. Common types include lift type, swing type, butterfly type, etc. It is suitable for different working conditions of pressure and temperature requirements and is widely used in water supply and drainage, heating and ventilation, petrochemical, power and other industrial and civil pipeline systems.

[0003] At present, the existing check valve (such as announcement number: CN222026350U) discloses a high-pressure check valve, which comprises a valve body, a water inlet, a water outlet and a valve cover. The left side of the valve body is provided with a water inlet, and the right side of the valve body is provided with a water outlet. The top end of the valve body is connected with the valve cover through bolts. The inside of the valve body is provided with a sealing mechanism. The high-pressure check valve can stop the medium flowing through the valve body and prevent the medium from flowing back through the cooperation of the above structure. When the spring in the sealing mechanism deforms after a long time, the spring will lose its resilience. By rotating the knob, the screw rod can be driven to rotate, thereby driving the upper spring seat to move downward, so that the spring can be compressed again, and the spring can maintain the pressure on the lower spring seat. Avoid the situation that the sealing seat cover is not tight, improve its service life, and facilitate the replacement of the sealing seat through the cooperation of the baffle, guide column and clamp.

[0004] However, during the implementation of the above technical solution, at least the following technical problems are found: The check valve mainly relies on the gravity of the valve disc and the reverse pressure of the medium to achieve sealing, and lacks an effective active locking mechanism. When the pipeline system operates, the device main body may vibrate, which may cause a small gap between the valve disc and the valve seat. This gap may cause reverse leakage of high-pressure medium, which not only affects the stability of the pipeline system pressure, but also may cause process disorder and impact damage to downstream equipment such as pumps and compressors. At the same time, the gap caused by vibration may exacerbate the wear of the valve disc and the valve seat, shorten the service life of the components, and increase the maintenance cost. SUMMARY

[0005] The technical problems solved by the present application are: the check valve mainly relies on the gravity of the valve disc and the reverse pressure of the medium to realize sealing, lacks an effective active locking mechanism, when the pipeline system operates to cause vibration of the device main body, a small gap is easily generated on the fitting surface of the valve disc and the valve seat, the gap can cause reverse leakage of the high-pressure medium, not only affects the pressure stability of the pipeline system, but also can cause process disorder, causes impact damage to the downstream equipment such as pumps and compressors, at the same time, the gap caused by vibration can aggravate the wear of the valve disc and the valve seat, shorten the service life of the components, and increase the maintenance cost.

[0006] In view of the deficiencies of the prior art, the present application provides a high-pressure high-sealing high-life check valve, thereby solving the technical problems mentioned in the background art.

[0007] To achieve the above object, the present application is realized by the following technical scheme: A high-pressure high-sealing high-life check valve, comprising a device main body, the inside of the device main body is provided with a valve disc for controlling liquid, the inner wall of the device main body is further provided with a valve seat corresponding to the valve disc, the side surface of the valve disc is fixedly connected with a hinged plate, the upper end of the hinged plate is hinged with the inner wall of the device main body, the inside of the device main body is provided with a limiting mechanism, the limiting mechanism comprises a limiting plate.

[0008] In a possible implementation manner, the side surface of the valve disc is fixedly connected with a motor, and the side of the valve disc away from the motor is rotatably connected with a rotating column.

[0009] In a possible implementation manner, the limiting plate is fixedly connected with the other side of the rotating column, and the output port of the motor is fixedly connected with the rotating column through the valve disc.

[0010] In a possible implementation manner, the right surface of the limiting plate is flush with the left surfaces of the two flow barriers.

[0011] In a possible implementation manner, the inner wall of the valve seat is fixedly connected with two flow barriers.

[0012] In a possible implementation manner, the left surface of the valve disc is fixedly connected with a rubber ring, and the rubber ring is movably sleeved with the valve seat.

[0013] In a possible implementation manner, the side of the two flow barriers away from the valve disc is provided with a rectangular groove, and the two flow barriers are movably sleeved with arc blocks through the rectangular grooves.

[0014] In a possible implementation manner, the side of each of the two arc blocks facing the flow barrier is fixedly connected with a spring, and the other end of each of the two springs is fixedly connected with the inner wall of the corresponding flow barrier.

[0015] In a possible implementation, the upper and lower ends of the two cambered blocks are fixedly connected with limiting blocks, and the inner wall of each flow barrier is provided with two limiting grooves corresponding to the limiting blocks.

[0016] In a possible implementation, each limiting block is slidably connected with the corresponding flow barrier through the limiting groove.

[0017] Compared with the prior art, the beneficial effects are as follows: 1. In the scheme, the rubber ring accurately fills the gap, blocks the leakage channel of the high-pressure medium from the physical level, and the flexible material can adapt to the small displacement under the vibration working condition, avoiding the sealing failure caused by rigid fitting; the limiting mechanism actively locks the limiting plate through the motor, and forcibly presses the valve disc and the valve seat, completely eliminating the gap caused by equipment vibration, even in the scene of high-pressure pulse or frequent start-stop, the zero leakage sealing effect can still be maintained, meeting the strict use requirements of high pressure and high medium purity, compared with the passive sealing relying on medium pressure and gravity, the active locking and flexible compensation design of the valve can cope with various complex working conditions such as temperature fluctuation, pipeline vibration and medium impact, the sealing performance is stable and consistent, and the system pressure abnormality, process medium waste or safety hazard caused by sealing failure are effectively avoided; 2. In the scheme, the flow barrier buffers the medium backflow impact force in advance, avoids the direct impact of high-pressure medium on the valve disc, and reduces the impact and wear of the valve disc and the valve seat; the cambered block cooperates with the spring to provide flexible buffering for the rotation of the limiting plate, and prevents deformation or fracture caused by hard collision; the limiting mechanism locks the position of the valve disc to prevent displacement under vibration or medium impact, avoids dislocation and wear of the sealing surface, and greatly reduces the wear speed of the core components such as the valve disc and the valve seat. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above description is only a summary of the technical scheme of the present application. In order to more clearly understand the technical means of the present application, and to implement the content of the description, the following will be described in detail with the preferred embodiments of the present application and with the help of the drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 2 It is a schematic diagram of the structure inside the main body of the device of the present application; Figure 3 It is a schematic diagram of the structure of the valve seat of the present application; Figure 4 It is a schematic diagram of the structure of the limiting plate of the present application; Figure 5 It is a schematic diagram of the structure of the cambered block of the present application; Figure 6 It is a schematic diagram of the structure of the flow barrier of the present application; Figure 7 It is a schematic diagram of the structure of the flow barrier of the present application;Figure 6 Enlarged structural schematic view at A.

[0020] Legend: 11, device body; 12, valve seat; 13, hinged plate; 14, rubber ring; 15, valve flap; 16, choke fence; 17, motor; 18, rotating column; 19, limiting plate; 20, cam block; 21, rectangular groove; 22, spring; 23, limiting block; 24, limiting sliding groove. DETAILED DESCRIPTION

[0021] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail with reference to the accompanying drawings.

[0022] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0023] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0024] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. In the description of the specification, the description referring to the terms "one scheme", "some schemes", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the scheme or example are included in at least one scheme or example of the present application. In the present specification, the illustrative description of the above-mentioned terms does not necessarily refer to the same scheme or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more schemes or examples; The technical scheme in the embodiment of the present application is to solve the problem in the prior art that the check valve mainly relies on the gravity of the valve disc and the reverse pressure of the medium to realize sealing, lacks an effective active locking mechanism, when the pipeline system is running, the fitting surface of the valve disc and the valve seat is easy to produce a small gap, this gap will cause the reverse leakage of the high-pressure medium, not only affects the pressure stability of the pipeline system, but also may cause process disorder, causes impact damage to the downstream equipment such as the pump and the compressor, at the same time, the gap caused by the vibration will aggravate the wear of the valve disc and the valve seat, shortens the service life of the components, and increases the maintenance cost, the overall idea is as follows: Embodiment

[0026] Please refer to Figure 1 and Figure 7As shown, the present embodiment relates to a high-pressure high-sealing high-life check valve, the core component of which includes a device body 11, which is a hollow structure, and its internal space is used to accommodate medium flow and install various functional components. The check valve is commonly used as a valve in the pipeline system, and has other names such as one-way valve and non-return valve. Its core function is to prevent the backflow of the medium transported in the pipeline, and only allows the medium to flow in a single direction as previously set. When the check valve is in an open operating state, the pressure generated by the medium flowing in the pipeline will directly act on the valve disc 15. The pressure needs to be greater than the gravity of the valve disc 15. Under the action of this pressure, the valve disc 15 will separate from the state of being attached to the valve seat 12, and then form a flow-through passage for the medium in the device body 11. When the medium in the pipeline appears a backflow trend, the reverse pressure generated by the backflow medium will form a combined force with the gravity of the valve disc 15. The combined force will push the valve disc 15 towards the valve seat 12, and make the valve disc 15 tightly pressed on the surface of the valve seat 12, and finally achieve the blocking of the backflow of the medium. The application scene of the check valve is mainly to protect the connected pumps, compressors and other equipment in the pipeline system, to avoid abnormal fluctuations in system pressure, impact damage to internal components of the equipment or disorder of production process caused by backflow of the medium. The medium types it applies to cover water, steam, gas, oil and other common industrial media. When actually installed, it needs to be fixed at a proper position of the pipeline system, and needs to select a check valve type that matches the working conditions according to the actual pressure value, temperature range and flow size of the medium in the pipeline. The check valve is a key component to ensure the safe and stable operation of the entire pipeline system. A valve disc 15 is arranged in the internal chamber of the device body 11. The specific function of the valve disc 15 is to control the flow and block of the liquid in the device body 11. Its shape and size need to be adapted to the internal chamber of the device body 11 and the valve seat 12. The inner wall surface of the device body 11 is fixedly provided with a valve seat 12 corresponding to the position of the valve disc 15. The valve seat 12 and the valve disc 15 are arranged in a one-to-one correspondence. The fitting surface of the two needs to be precisely machined to ensure the sealing when fitting. The side surface of the valve disc 15 is fixedly connected with a hinged plate 13. The upper end of the hinged plate 13 is hingedly connected with the inner wall of the device body 11 through a hinge structure. The hinge structure allows the hinged plate 13 to drive the valve disc 15 to deflect by a certain angle around the hinge point. When there is no liquid passing through the device body 11, the hinged plate 13 will naturally deflect downward under the combined action of its own gravity and the gravity of the valve disc 15. The hinged plate 13 will synchronously drive the valve disc 15 to deflect in the process of deflection. When the valve disc 15 deflects to the position of completely fitting with the valve seat 12, it will completely cover the flow-through opening of the valve seat 12, thereby realizing the rapid blocking of the reverse flow of the medium and avoiding the backflow of the medium when there is no forward pressure. The inner wall surface of the valve seat 12 is fixedly connected with two flow resistance fences 16 through a welding process. The two flow resistance fences 16 are symmetrically distributed on both sides of the inner wall of the valve seat 12, have a grid structure, have certain strength and rigidity, and have the primary function of buffering the impact degree generated when the liquid flows. When the liquid flows forward or reversely impacts, the flow resistance fence 16 forms a certain resistance to the liquid, disperses the impact force of the liquid, thereby reducing the direct impact of the liquid on the surface of the valve disc 15, reducing the wear of the valve disc 15 caused by the impact, prolonging the service life of the valve disc 15, and simultaneously the grid structure of the flow resistance fence 16 can comb the flow direction of the liquid, so that the liquid flows along the preset path, avoiding the formation of turbulent flow of the liquid inside the device main body 11. The turbulent flow can cause irregular pressure of the liquid on the fitting surface of the valve disc 15 and the valve seat 12, affecting the sealing fitting effect of the two, and the flow resistance fence 16 can further improve the running stability of the check valve under high pressure working condition through the above buffering and flow guiding effects, cooperate with the sealing structure of the valve disc 15 and the valve seat 12, reduce the maintenance frequency caused by the damage or sealing failure of the components, thereby reducing the overall maintenance cost.In the inner chamber of the device body 11, a limiting mechanism is also arranged. The core function of the limiting mechanism is to control the valve clack 15 and the valve seat 12 to keep close contact, prevent the two from having a gap when the device body 11 vibrates, and the components of the limiting mechanism include a limiting plate 19. The side surface of the valve clack 15 is fixedly connected with a motor 17. The output port of the motor 17 is arranged towards the direction of the valve clack 15. The side away from the motor 17 of the valve clack 15 is rotatably connected with a rotating column 18. The axis of the rotating column 18 is consistent with the axis of the output shaft of the motor 17. One side surface of the limiting plate 19 is fixedly connected with the other side away from the valve clack 15 of the rotating column 18. The output port of the motor 17 penetrates through the valve clack 15 and is fixedly connected with the rotating column 18, so as to ensure that the motor 17 can drive the rotating column 18 to rotate synchronously when the motor 17 is started. In the initial state, the right surface of the limiting plate 19 keeps flush with the left surface of the two flow barriers 16 and does not contact each other. When the valve clack 15 completely covers the valve seat 12 under the action of the reverse pressure and its own gravity, the control system will send a signal to start the motor 17. The output shaft of the motor 17 starts to rotate, and the output shaft drives the rotating column 18 connected therewith to rotate synchronously. When the rotating column 18 rotates, it will drive the limiting plate 19 fixedly connected therewith to rotate around the axis of the rotating column 18. When the angle of the limiting plate 19 reaches ninety degrees, the right surface of the limiting plate 19 will be in full contact with the left surface of the two flow barriers 16 and abut against the same. At this time, the motor 17 stops running. The rotating column 18 is kept in a fixed state by the motor 17, so as to realize the locking of the limiting plate 19. The locking state will generate a pressure towards the valve seat 12 on the valve clack 15, so that the valve clack 15 and the valve seat 12 always keep close contact, thereby eliminating the contact gap caused by the vibration of the device body 11, strengthening the sealing reliability of the check valve under high pressure working condition, completely blocking the channel of reverse leakage of the medium, avoiding the damage of the valve clack 15 caused by vibration, and further prolonging the overall service life of the valve. The left surface of the valve clack 15 is fixedly connected with a rubber ring 14. The material of the rubber ring 14 is elastic rubber which is resistant to high pressure and wear. The inner diameter of the rubber ring 14 is adapted to the outer diameter of the valve seat 12. The rubber ring 14 and the valve seat 12 form a movable sleeving relationship, that is, the rubber ring 14 can move synchronously with the valve clack 15 when the valve clack 15 deflects, and the rubber ring 14 can be sleeved on the inner side of the valve seat 12 when the valve clack 15 is in contact with the valve seat 12. The main function of the rubber ring 14 is to fill the small gap that may exist when the valve clack 15 and the valve seat 12 are in contact, greatly improving the sealing performance between the two, and blocking the channel of leakage of high-pressure medium through the gap. At the same time, the flexible material properties of the rubber ring 14 enable it to adapt to the small displacement between the valve clack 15 and the valve seat 12 when the device body 11 vibrates, ensuring that the sealing state can still be maintained under the vibration working condition. The rubber ring 14 cooperates with the locking effect of the limiting mechanism to further strengthen the overall sealing reliability of the check valve, ensure that the valve can operate stably for a long time under high pressure environment, and avoid safety hazards or economic losses caused by sealing failure. Two blocking fences 16 away from the valve disc 15, each is provided with a rectangular slot 21, the size of the rectangular slot 21 is matched with the size of the arc block 20, for accommodating the installation and movement of the arc block 20, two blocking fences 16 are movably sleeved with an arc block 20 through the respective rectangular slot 21, the outer surface of the arc block 20 is arc-shaped structure, which is convenient for reducing friction when contacting with the rotating limiting plate 19, the arc block 20 facing the blocking fence 16 is fixedly connected with a spring 22, the spring 22 is a compression spring, which has a certain elastic coefficient, the other end of the two springs 22 is fixedly connected with the inner wall surface inside the rectangular slot 21 of the corresponding blocking fence 16, the spring 22 is in a natural elongation state in the initial state, a part of the arc block 20 protrudes outside the rectangular slot 21, when the limiting plate 19 starts to rotate under the drive of the motor 17, the edge of the limiting plate 19 will gradually contact with the arc surface of the arc block 20, and an extrusion force towards the inside of the rectangular slot 21 is generated on the arc block 20, under the action of the extrusion force, the two arc blocks 20 will gradually extrude into the inside of the rectangular slot 21 of the corresponding blocking fence 16, at the same time, the arc block 20 will compress the spring 22 connected therewith, so that the spring 22 is elastically deformed, the arc block 20 and the spring 22 are matched in the above manner, during the rotation of the limiting plate 19, the arc block 20 is extruded and contracted, and the spring 22 is elastically deformed, so as to provide a buffering force for the rotation of the limiting plate 19, avoiding the hard collision between the limiting plate 19 and the blocking fence 16, thereby preventing the deformation or damage of the limiting plate 19, the blocking fence 16 and other components caused by the collision. The upper and lower ends of the two arc blocks 20 are fixedly connected with a limiting block 23, the limiting block 23 is a rectangular block structure, which has a certain strength, the inner wall of the rectangular slot 21 of each blocking fence 16 is provided with two limiting sliding grooves 24 corresponding to the limiting block 23, the limiting sliding groove 24 is a rectangular slot structure, the length direction of which is consistent with the moving direction of the arc block 20, and the width and depth thereof are matched with the width and thickness of the limiting block 23, respectively, each limiting block 23 is slidably connected with the corresponding blocking fence 16 through the corresponding limiting sliding groove 24, that is, the limiting block 23 can slide in the length direction of the limiting sliding groove 24, but cannot move in the direction perpendicular to the length direction of the limiting sliding groove 24, the limiting block 23 and the limiting sliding groove 24 are matched in the above manner, which can limit the moving track of the arc block 20, so as to ensure that the arc block 20 can only move in the depth direction of the rectangular slot 21, avoiding the deviation or jamming of the arc block 20 under the elastic force of the spring 22 or the liquid impact force, ensuring that the arc block 20 can smoothly move in the fixed path, thereby improving the accuracy of the cooperation between the arc block 20 and the limiting plate 19, ensuring that the locking function and the buffering function of the limiting mechanism can be stably realized, and further enhancing the operation reliability of the entire check valve structure.

[0027] Working principle: First, the reverse pressure generated by the medium counterflow and the gravity of the valve disc 15 together push the valve disc 15 to quickly return to the valve seat 12, at this time the rubber ring 14 on the left surface of the valve disc 15 first contacts and tightly fits the valve seat 12, using the flexible characteristics of rubber to fill the fitting gap, initially blocking the medium leakage channel, forming the first heavy seal protection; Second, after the valve disc 15 is fitted with the valve seat 12, the motor 17 is started, its output end drives the rotating column 18 to rotate, and then drives the limiting plate 19 to rotate synchronously, when the limiting plate 19 rotates by 90 degrees, its right surface precisely abuts the left surface of the two flow barriers 16, and through the mechanical locking mode, the valve disc 15 is forced to be pressed tightly on the valve seat 12, eliminating the fitting gap caused by the vibration or high pressure impact of the device main body 11, forming the second heavy seal protection. Third, the flexible material of the rubber ring 14 can adapt to the slight displacement of the valve disc 15 and the valve seat 12 under vibration conditions, even if the device main body 11 has slight vibration, it can still maintain tight fitting; the mechanical locking of the limiting mechanism fundamentally inhibits the displacement of the valve disc 15, double-protected sealing effect in vibration environment.

[0028] Finally, it should be noted that the above detailed disclosure has been described, and obviously, for those skilled in the art, the above detailed disclosure is only used as an example, and does not constitute a limitation on the present specification. Although it is not explicitly stated here, those skilled in the art may make various modifications, improvements and corrections to the present specification. Such modifications, improvements and corrections are suggested in the present specification, so such modifications, improvements and corrections still belong to the spirit and scope of the exemplary embodiments of the present specification. At the same time, the present specification uses specific words to describe the embodiments of the present specification. As "one embodiment", "an embodiment", and / or "some embodiments" mean a certain feature, structure or characteristic related to at least one embodiment of the present specification. Therefore, it should be emphasized and noted that the "an embodiment" or "one embodiment" or "one alternative embodiment" mentioned in different places in the present specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present specification can be properly combined. In addition, unless the claim explicitly states, the order of the processing elements and sequences described in the present specification, the use of numerical letters, or the use of other names, is not intended to limit the order of the processes and methods of the present specification.

Claims

1. A high-pressure, high-sealing, and long-life check valve, comprising a device body (11), characterized in that, The device body (11) is provided with a valve disc (15) for controlling liquid inside. The inner wall of the device body (11) is also provided with a valve seat (12) corresponding to the valve disc (15). A hinge plate (13) is fixedly connected to the side surface of the valve disc (15). The upper end of the hinge plate (13) is hinged to the inner wall of the device body (11). The device body (11) is provided with a limit mechanism inside. The limit mechanism includes a limit plate (19).

2. The high-pressure, high-sealing, and long-life check valve as described in claim 1, characterized in that, A motor (17) is fixedly connected to the side surface of the valve disc (15), and a rotating column (18) is rotatably connected to the side of the valve disc (15) away from the motor (17).

3. The high-pressure, high-sealing, and long-life check valve as described in claim 2, characterized in that, The limiting plate (19) is fixedly connected to the other side of the rotating column (18), and the output port of the motor (17) is fixedly connected to the rotating column (18) through the valve disc (15).

4. The high-pressure, high-sealing, and long-life check valve as described in claim 3, characterized in that, The right surface of the limiting plate (19) is flush with the left surface of the two flow-blocking fences (16).

5. The high-pressure, high-sealing, and long-life check valve as described in claim 1, characterized in that, Two flow-blocking grilles (16) are fixedly connected to the inner wall of the valve seat (12).

6. The high-pressure, high-sealing, and long-life check valve as described in claim 1, characterized in that, A rubber ring (14) is fixedly connected to the left surface of the valve disc (15), and the rubber ring (14) is movably sleeved with the valve seat (12).

7. A high-pressure, high-sealing, and long-life check valve as described in claim 5, characterized in that, The two flow-blocking gates (16) have rectangular grooves (21) on the side facing away from the valve disc (15), and both flow-blocking gates (16) are movably connected to arc-shaped blocks (20) through the rectangular grooves (21).

8. The high-pressure, high-sealing, and long-life check valve as described in claim 7, characterized in that, Both of the arc-shaped blocks (20) have springs (22) fixedly connected to the side facing the flow barrier (16), and the other end of each spring (22) is fixedly connected to the inner wall of the corresponding flow barrier (16).

9. A high-pressure, high-sealing, and long-life check valve as described in claim 8, characterized in that, Both ends of the two arc-shaped blocks (20) are fixedly connected to limit blocks (23), and the inner wall of each flow barrier (16) is provided with two limit grooves (24) corresponding to the limit blocks (23).

10. A high-pressure, high-sealing, and long-life check valve as described in claim 9, characterized in that, Each of the limiting blocks (23) is slidably connected to the corresponding flow barrier (16) via a limiting groove (24).

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