Check valve with flexible adjusting function and hydraulic system

Abstract

The utility model provides a check valve and hydraulic system that have the flexible regulation function, check valve includes: cylinder and internal valve subassembly, the internal valve subassembly is located in the cylinder, the cylinder is flexible structure, internal valve subassembly includes valve deck, valve seat and valve plate, the valve deck is connected and fixed with the cylinder, the valve seat is also connected and fixed with the cylinder, the valve plate is also connected and fixed with the cylinder, and the valve deck is connected and fixed with the cylinder. A cavity allowing fluid to flow is defined by the cylinder, the valve deck and the valve seat, the valve plate is located between the valve deck and the valve seat and can move between the valve deck and the valve seat, and the matching structure of the valve plate, the valve deck and the valve seat only allows the fluid to impact and push the valve plate from the valve deck to flow into the cavity and flow out from the valve seat. According to the hydraulic module, one-way non-return of fluid is achieved, meanwhile, flexible buffering can be achieved, structural integration is achieved, and high integration of large capacity and small size of the hydraulic module is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic systems, in particular to a check valve with a flexible regulating function and a hydraulic system. Background Art

[0002] Rubber flexible joints and check valves are common components in hydraulic systems. Rubber flexible joints: They have the ability to adjust axial and radial deformations, which is conducive to the matching connection of steel pipes, etc., and can buffer the impact and vibration generated when the water pump is turned on, off and running, and have the effect of shock absorption and noise reduction. Check valve: It has a one-way passing capacity and different reverse directions. It is often installed at the outlet of the water pump to avoid damage to the water pump impeller due to water backwash during shutdown. It is an important protective device for the core water pump of the waterway protection.

[0003] The two components in the prior art are installed in series, but this occupies a large space, has a non-compact structure, is not conducive to the high integration of a hydraulic module with a large capacity and a small volume, and wastes a lot of space.

[0004] Since the hydraulic system in the prior art is installed in series by using rubber flexible joints and check valves, which results in technical problems such as occupying a large space and being unfavorable for the integration of hydraulic modules, the utility model studies and designs a check valve and hydraulic system with flexible adjustment function. Utility Model Content

[0005] Therefore, the technical problem to be solved by the utility model is to overcome the defect that the hydraulic system in the prior art is installed in series by using rubber flexible joints and check valves, which results in a large space being occupied and is not conducive to the integration of the hydraulic module, thereby providing a check valve and hydraulic system with flexible adjustment function.

[0006] In order to solve the above problems, the utility model provides a check valve with flexible adjustment function, which includes:

[0007] A cylinder and an internal valve assembly, wherein the internal valve assembly is located inside the cylinder, the cylinder is a flexible structure, the internal valve assembly includes a valve cover, a valve seat and a valve plate, the valve cover is connected to and fixed to the cylinder, the valve seat is also connected to and fixed to the cylinder, the cylinder, the valve cover and the valve seat form a cavity for fluid flow, the valve plate is located between the valve cover and the valve seat and can move between the valve cover and the valve seat, and the matching structure of the valve plate, the valve cover and the valve seat only allows the fluid to impact the valve cover to push the valve plate into the cavity and flow out from the valve seat.

[0008] In some embodiments,

[0009] It also includes a valve stem, the inner periphery of the valve cover has a first axial hole, the inner periphery of the valve seat has a second axial hole, one axial end of the valve stem is inserted into the first axial hole to form a sleeve connection with the valve cover, the other axial end of the valve stem is inserted into the second axial hole to form a sleeve connection with the valve seat, the inner periphery of the valve plate has a third axial hole and is sleeved on the outer periphery of the valve stem through the third axial hole, so that the valve plate can slide along the axial direction of the valve stem.

[0010] In some embodiments,

[0011] It also includes an elastic structure, which is sleeved on the outer circumference of the valve stem, and one end of the elastic structure is connected to the valve plate, and the other end of the elastic structure is connected to the valve seat, and the elastic structure can apply an elastic thrust to the valve plate.

[0012] In some embodiments,

[0013] A shaft sleeve is also arranged in the second shaft hole of the valve seat, and the shaft sleeve is sleeved on the outer periphery of the valve stem so as to rotatably fix the valve stem.

[0014] In some embodiments,

[0015] The cylinder includes a first connecting section, a middle section and a second connecting section, the first connecting section, the middle section and the second connecting section are connected in sequence along the axial direction of the cylinder, the outer peripheral wall of the valve cover is fixedly connected to the inner peripheral wall of the first connecting section, the outer peripheral wall of the valve seat is fixedly connected to the inner peripheral wall of the second connecting section, the valve plate is located inside the middle section, and the middle section can undergo flexible deformation.

[0016] In some embodiments,

[0017] It also includes a first flange, a second flange and a boost ring, the first flange is sleeved on the outer periphery of the first connecting section of the cylinder, the second flange is sleeved on the outer periphery of the second connecting section of the cylinder, and the boost ring is arranged at the position where the first flange is connected to the first connecting section and / or at the position where the second flange is connected to the second connecting section.

[0018] In some embodiments,

[0019] The valve cover is a flexible structure, the valve seat is a rigid structure, and the cylinder is made of rubber material;

[0020] When the fluid enters the cavity from the valve seat, the valve plate abuts against the valve cover to close the passage at the valve cover.

[0021] In some embodiments,

[0022] The valve cover comprises a first outer ring body, a first connecting rib and a first inner ring body, wherein the first outer ring body is located at the outer periphery of the first inner ring body, and the first connecting rib is connected between the first outer ring body and the first inner ring body, and there are a plurality of first connecting ribs, which are arranged at intervals along the circumferential direction, and a first channel for fluid to flow through is formed between two adjacent first connecting ribs, i.e., a channel at the valve cover;

[0023] The valve seat includes a second outer ring body, a second connecting rib and a second inner ring body, the second outer ring body is located on the outer periphery of the second inner ring body, and the second connecting rib is connected between the second outer ring body and the second inner ring body, and there are multiple second connecting ribs, and the multiple second connecting ribs are arranged at intervals along the circumferential direction, and a second channel for fluid to flow through is formed between two adjacent second connecting ribs.

[0024] In some embodiments,

[0025] A first inclined surface is also formed on the axial end face of the first outer ring body facing the valve plate, and the direction from the radial inner end to the radial outer end of the first inclined surface along the axial direction of the valve cover is a first direction, and the direction in which the airflow impacts the valve plate from the valve cover toward the cavity is along the first direction, and a second inclined surface is provided at the radial outer end of the valve plate toward the first outer ring body, and the second inclined surface is arranged in contact with the first inclined surface when the valve plate is connected to the valve cover.

[0026] The utility model also provides a hydraulic system, which comprises the aforementioned check valve with flexible regulating function.

[0027] The utility model provides a check valve with flexible adjustment function and a hydraulic system having the following features:

[0028] Beneficial effects:

[0029] The utility model uses a cylinder with a flexible structure, and arranges an internal valve component inside the cylinder, and the internal valve component includes a valve cover, a valve seat and a valve plate. The valve cover, the valve seat and the cylinder form a cavity, and the valve plate can move back and forth in the cavity, and the cavity can allow fluid to enter. In the cavity, the cylinder structure with a flexible structure can be deformed in axial and / or radial directions to buffer the impact and vibration of the fluid, and has an effective vibration reduction and noise reduction effect. The structure of the valve plate, the valve seat and the valve cover can only allow the fluid to enter the cavity by impacting the valve plate from the valve cover and be discharged from the cavity through the valve seat, and prevents the fluid from entering the cavity from the valve seat and / or being discharged from the cavity through the valve cover, effectively realizing the unidirectional conduction and check function of the fluid, and at the same time, it can also have a flexible buffering and vibration reduction effect on the impact of the fluid, and realizes structural integration, making the structure compact, realizing the multi-functions of check, vibration reduction and small volume, and being conducive to the high integration of the hydraulic module with large capacity and small volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a three-dimensional structural diagram of the check valve with flexible adjustment function of the utility model;

[0031] Figure 2 yes Figure 1 Internal structure diagram of ;

[0032] Figure 3 This is a front structural diagram of the check valve with flexible adjustment function of the utility model;

[0033] Figure 4 yes Figure 3 Internal structure diagram of ;

[0034] Figure 5 yes Figure 4 Left view of

[0035] Figure 6 yes Figure 4 Right view of .

[0036] The reference numerals are:

[0037] 1. Cylinder; 2. Internal valve assembly; 3. Valve cover; 4. Valve seat; 5. Valve plate; 6. Cavity; 7. Valve stem; 8. First connecting section; 9. Middle section; 10. Second connecting section; 11. First outer ring body; 12. First connecting rib; 13. First inner ring body; 14. Second outer ring body; 15. Second connecting rib; 16. Second inner ring body; 17. First channel; 18. First inclined surface; 19. Second inclined surface; 20. Elastic structure; 21. First flange; 22. Second flange; 23. Booster ring; 24. Bushing; 25. Second channel. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0039] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0040] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0041] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0042] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0043] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0044] like Figure 1-6 As shown, the utility model provides a check valve with flexible adjustment function, which includes:

[0045] A cylinder 1 and an internal valve assembly 2, wherein the internal valve assembly 2 is located inside the cylinder 1, and the cylinder 1 is a flexible structure. The internal valve assembly 2 includes a valve cover 3, a valve seat 4 and a valve plate 5. The valve cover 3 is connected to and fixed to the cylinder 1, and the valve seat 4 is also connected to and fixed to the cylinder 1. The cylinder 1, the valve cover 3 and the valve seat 4 form a cavity 6 for fluid flow, and the valve plate 5 is located between the valve cover 3 and the valve seat 4 and can move between the valve cover 3 and the valve seat 4. The matching structure of the valve plate 5, the valve cover 3 and the valve seat 4 only allows the fluid to impact the valve cover 3 to push the valve plate 5 into the cavity 6 and flow out from the valve seat 4.

[0046] The utility model uses a cylinder with a flexible structure, and arranges an internal valve component inside the cylinder, and the internal valve component includes a valve cover, a valve seat and a valve plate. The valve cover, the valve seat and the cylinder form a cavity, and the valve plate can move back and forth in the cavity, and the cavity can allow fluid to enter. In the cavity, the cylinder structure with a flexible structure can be deformed in axial and / or radial directions to buffer the impact and vibration of the fluid, and has an effective vibration reduction and noise reduction effect. The structure of the valve plate, the valve seat and the valve cover can only allow the fluid to enter the cavity by impacting the valve plate from the valve cover and be discharged from the cavity through the valve seat, and prevents the fluid from entering the cavity from the valve seat and / or being discharged from the cavity through the valve cover, effectively realizing the unidirectional conduction and check function of the fluid, and at the same time, it can also have a flexible buffering and vibration reduction effect on the impact of the fluid, and realizes structural integration, making the structure compact, realizing the multi-functions of check, vibration reduction and small volume, and being conducive to the high integration of the hydraulic module with large capacity and small volume.

[0047] In some embodiments,

[0048] It also includes a valve stem 7, the inner periphery of the valve cover 3 has a first axial hole, the inner periphery of the valve seat 4 has a second axial hole, one axial end of the valve stem 7 is inserted into the first axial hole to form a sleeve connection with the valve cover 3, the other axial end of the valve stem 7 is inserted into the second axial hole to form a sleeve connection with the valve seat 4, the inner periphery of the valve plate 5 has a third axial hole and is sleeved on the outer periphery of the valve stem 7 through the third axial hole, so that the valve plate 5 can slide along the axial direction of the valve stem 7.

[0049] This is a further preferred structural form of the check valve with flexible adjustment function of the utility model. The valve cover, valve seat and valve plate can be connected as a whole through the valve stem structure. The valve cover and valve seat support the valve stem, and the valve plate is used to support the valve plate so that the valve plate can move along the axial direction of the valve stem, thereby achieving the purpose of one-way opening of the check valve and reverse closing of the check valve. The valve stem, valve cover and valve seat of the utility model are preferably fixedly connected respectively (such as interference fit), and the valve stem and valve plate are preferably clearance fit and clearance sleeve.

[0050] In some embodiments,

[0051] It also includes an elastic structure 20, which is sleeved on the outer periphery of the valve stem 7, and one end of the elastic structure 20 is connected to the valve plate 5, and the other end of the elastic structure 20 is connected to the valve seat 4. The elastic structure 20 can apply an elastic thrust to the valve plate 5.

[0052] The utility model further preferably applies an elastic thrust to the valve plate through the setting of an elastic structure, so that when there is no fluid impact at both ends, the valve plate is pushed by the elastic structure and abuts against the valve cover, closing the fluid channel from the valve seat to the valve cover, and closing the fluid channel from the valve cover to the valve seat. However, when the fluid impacts the valve cover from the valve cover, it can impact the valve plate through the channel on the valve cover, thereby pushing the valve plate to move in the direction of the valve seat, thereby opening the cavity, allowing the fluid to enter the cavity and be discharged from the channel on the valve seat, thereby achieving a unidirectional conduction effect. When the fluid flows from the valve seat to the valve plate, the valve plate is always abutted against the valve cover under the elastic force of the elastic structure and the fluid impact force, so that the fluid will not flow out of the valve cover, thereby achieving a one-way check effect.

[0053] In some embodiments,

[0054] A shaft sleeve 24 is further provided in the second shaft hole of the valve seat 4 . The shaft sleeve 24 is sleeved on the outer circumference of the valve stem 7 so as to rotatably fix the valve stem 7 .

[0055] The utility model can effectively fix the valve stem by means of the shaft sleeve arranged in the second shaft hole of the valve seat, thereby preventing the valve stem from moving during operation, thereby improving the sealing performance.

[0056] In some embodiments,

[0057] The cylinder 1 includes a first connecting section 8, an intermediate section 9 and a second connecting section 10, wherein the first connecting section 8, the intermediate section 9 and the second connecting section 10 are sequentially connected along the axial direction of the cylinder 1, the outer peripheral wall of the valve cover 3 is fixedly connected to the inner peripheral wall of the first connecting section 8, the outer peripheral wall of the valve seat 4 is fixedly connected to the inner peripheral wall of the second connecting section 10, the valve plate 5 is located inside the intermediate section 9, and the intermediate section 9 can undergo flexible deformation.

[0058] This is the preferred structural form of the cylinder of the utility model. It can form support and connection with the valve cover through the first connecting section, and can form support and connection with the valve seat through the second connecting section. The middle section is used to form a cavity to accommodate the entry of fluid, and can undergo flexible deformation when impacted by the fluid, thereby playing a role in buffering, vibration reduction and noise reduction.

[0059] In some embodiments,

[0060] It also includes a first flange 21, a second flange 22 and a boost ring 23. The first flange 21 is sleeved on the outer periphery of the first connecting section 8 of the cylinder 1, the second flange 22 is sleeved on the outer periphery of the second connecting section 10 of the cylinder 1, and the boost ring 23 is arranged at the position where the first flange 21 is connected to the first connecting section 8 and / or at the position where the second flange 22 is connected to the second connecting section 10.

[0061] The utility model further can connect to the first connecting section and the second connecting section of the cylinder respectively through the arrangement of the first flange and the second flange, thereby fixing the cylinder and installing the check valve structure into the hydraulic system. The function of the booster ring is to increase the deformation when a torque is applied during flange installation, thereby satisfying the end face extrusion seal and improving the sealing performance.

[0062] In some embodiments,

[0063] The valve cover 3 is a flexible structure, the valve seat 4 is a rigid structure, and the cylinder 1 is made of rubber material; when the fluid enters the cavity 6 from the valve seat 4, the valve plate 5 abuts against the valve cover 3 to close the channel at the valve cover 3.

[0064] This is a further preferred structural form of the valve cover and valve seat of the utility model. The valve cover is preferably a flexible structure, which can undergo appropriate deformation when the fluid impacts the valve cover to drive the valve plate to move, thereby opening the cavity and allowing the fluid to enter the cavity from the valve cover. The valve seat is a rigid structure, so there is no need to consider the situation where the fluid needs to be deformed when discharged from the valve seat, and it can be discharged smoothly from the channel at the valve seat; the cylinder of the flexible structure of the utility model is preferably made of rubber material, which can undergo the required flexible deformation and buffer the noise generated by the impact of the fluid; when the fluid flows from the valve seat toward the cavity, the utility model will cause the valve plate to abut against the valve cover and close the channel at the valve cover, thereby realizing the function of one-way check and one-way conduction.

[0065] The rubber cylinder of the utility model serves as the main structural frame and bears the overall supporting function. The material is rubber-like material, which is flexible and can be deformed by radial and axial stretching, compression, bending and the like.

[0066] The movable flange (including the first flange and the second flange) of the utility model is used for integrally connecting with a water pump, a pipeline and the like of a hydraulic module.

[0067] The booster ring of the utility model is used to increase the deformation when a torque is applied during the installation of a movable flange, thereby satisfying the end face extrusion sealing.

[0068] The valve cover of the utility model is installed at one end of the rubber cylinder, is used to fix one end of the valve stem shaft, and forms an open and closed limit switch with the valve plate.

[0069] The valve plate of the utility model is installed on the valve stem and forms an opening and closing limit switch with the valve cover.

[0070] The valve stem of the utility model is installed on the valve cover, the shaft sleeve and the valve seat, and is used for limiting the valve plate and facilitating the axial movement of the valve plate on the valve stem.

[0071] The shaft sleeve of the utility model is used to fix the valve stem.

[0072] The valve seat of the utility model is installed at one end of the rubber cylinder and is used for fixing one end of the valve stem shaft.

[0073] The spring (elastic structure 20) of the utility model is used to support the valve plate to switch and close the cavity.

[0074] In some embodiments,

[0075] The valve cover 3 includes a first outer ring body 11, a first connecting rib 12 and a first inner ring body 13, wherein the first outer ring body 11 is located at the outer periphery of the first inner ring body 13, and the first connecting rib 12 is connected between the first outer ring body 11 and the first inner ring body 13, and there are a plurality of first connecting ribs 12, which are arranged at intervals along the circumferential direction, and a first channel 17 for fluid to flow through is formed between two adjacent first connecting ribs 12, i.e., a channel at the valve cover 3;

[0076] The valve seat 4 includes a second outer ring body 14, a second connecting rib 15 and a second inner ring body 16, the second outer ring body 14 is located at the outer periphery of the second inner ring body 16, and the second connecting rib 15 is connected between the second outer ring body 14 and the second inner ring body 16, and there are multiple second connecting ribs 15, and the multiple second connecting ribs 15 are arranged at intervals in the circumferential direction, and a second channel 25 for fluid to flow through is formed between two adjacent second connecting ribs 15.

[0077] This is a further preferred structural form of the valve cover and valve seat of the utility model, that is, the valve cover is a structure including a first outer ring body, a first connecting rib and a first inner ring body, and can be fixed to the first connecting section of the cylinder body through the first outer ring body, the first inner ring body is fixedly connected to the valve stem, the first connecting rib is used to connect the first outer ring body and the first inner ring body, and a first channel allowing fluid to pass through is formed between adjacent first connecting ribs, so that the fluid can push the valve plate open through the valve cover and enter the cavity; the valve seat is a structure including a second outer ring body, a second connecting rib and a second inner ring body, and can be fixed to the second connecting section of the cylinder body through the second outer ring body, the second inner ring body is fixedly connected to the valve stem, the second connecting rib is used to connect the second outer ring body and the second inner ring body, and a second channel allowing fluid to pass through is formed between adjacent second connecting ribs, so that the fluid can be discharged from the cavity through the second channel of the valve seat.

[0078] In some embodiments,

[0079] A first inclined surface 18 is also formed on the axial end face of the first outer ring body 11 facing the valve plate 5. The direction from the radial inner end to the radial outer end of the first inclined surface 18 along the axial sub-direction of the valve cover 3 is a first direction. The direction in which the airflow impacts the valve plate 5 from the valve cover 3 toward the cavity 6 is along the first direction. The radial outer end of the valve plate 5 is provided with a second inclined surface 19 toward the first outer ring body 11. When the valve plate 5 is connected to the valve cover 3, the second inclined surface 19 is arranged in contact with the first inclined surface 18.

[0080] Preferably, both the first inclined surface and the second inclined surface are annular inclined surfaces.

[0081] The utility model also uses the first inclined surface on the first outer ring body and the second inclined surface arranged on the end face of the valve plate facing the valve cover, so that the two inclined surfaces can be arranged in a close fit when connected to ensure sealing. When fluid impacts the valve plate at the valve cover, the arrangement of the two inclined surfaces can enable the gas to generate a component force in the vertical direction acting on the inclined surfaces, thereby facilitating the valve plate to be pushed toward the valve seat and improving the one-way conduction effect.

[0082] The surface of the valve plate of the utility model facing the valve seat is a flat structure.

[0083] The check valve with flexible adjustment proposed by the utility model is realized by mixing the characteristics of the soft joint (cylinder with flexible structure) and the check valve, and utilizing the fusion of the cylinder and the rigid cylinder of the check valve to make the cylinder have flexibility, and installing a check locking mechanism (elastic structure 20) inside, thereby realizing the check valve with flexible adjustment, which is beneficial to reducing the size of both, facilitating the miniaturization of failed components and greatly reducing the installation space, so that it can realize small volume and multi-function, and facilitate the high integration of hydraulic modules.

[0084] The utility model also provides a hydraulic system, which comprises the aforementioned check valve with flexible regulating function.

[0085] The above is only a preferred embodiment of the utility model, and is not intended to limit the utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the utility model should be included in the protection scope of the utility model. The above is only a preferred implementation of the utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the utility model, and these improvements and variations should also be regarded as the protection scope of the utility model.

Claims

1. A check valve with flexible adjustment function, characterized in that: include: A cylinder (1) and an internal valve assembly (2), wherein the internal valve assembly (2) is located inside the cylinder (1), the cylinder (1) is a flexible structure, the internal valve assembly (2) comprises a valve cover (3), a valve seat (4) and a valve plate (5), the valve cover (3) is connected to and fixed to the cylinder (1), the valve seat (4) is also connected to and fixed to the cylinder (1), the cylinder (1), the valve cover (3) and the valve seat (4) form a cavity (6) for fluid flow, the valve plate (5) is located between the valve cover (3) and the valve seat (4) and can move between the valve cover (3) and the valve seat (4), and the matching structure of the valve plate (5), the valve cover (3) and the valve seat (4) only allows the fluid to impact the valve cover (3) to push the valve plate (5) into the cavity (6) and flow out from the valve seat (4).

2. The check valve with flexible adjustment function according to claim 1, characterized in that: It also includes a valve stem (7), the inner periphery of the valve cover (3) has a first axial hole, the inner periphery of the valve seat (4) has a second axial hole, one axial end of the valve stem (7) is inserted into the first axial hole to form a sleeve connection with the valve cover (3), the other axial end of the valve stem (7) is inserted into the second axial hole to form a sleeve connection with the valve seat (4), the inner periphery of the valve plate (5) has a third axial hole and is sleeved on the outer periphery of the valve stem (7) through the third axial hole, so that the valve plate (5) can slide along the axial direction of the valve stem (7).

3. The check valve with flexible adjustment function according to claim 2, characterized in that: It also includes an elastic structure (20), which is sleeved on the outer periphery of the valve stem (7), and one end of the elastic structure (20) is connected to the valve plate (5), and the other end of the elastic structure (20) is connected to the valve seat (4), and the elastic structure (20) can apply an elastic thrust to the valve plate (5).

4. The check valve with flexible adjustment function according to claim 2, characterized in that: A shaft sleeve (24) is also provided in the second shaft hole of the valve seat (4), and the shaft sleeve (24) is sleeved on the outer periphery of the valve stem (7) so as to rotatably fix the valve stem (7).

5. The check valve with flexible adjustment function according to claim 1, characterized in that: The cylinder (1) comprises a first connecting section (8), an intermediate section (9) and a second connecting section (10); the first connecting section (8), the intermediate section (9) and the second connecting section (10) are connected in sequence along the axial direction of the cylinder (1); the outer peripheral wall of the valve cover (3) is fixedly connected to the inner peripheral wall of the first connecting section (8); the outer peripheral wall of the valve seat (4) is fixedly connected to the inner peripheral wall of the second connecting section (10); the valve plate (5) is located inside the intermediate section (9); and the intermediate section (9) is capable of flexibly deforming.

6. The check valve with flexible adjustment function according to claim 5, characterized in that: It also includes a first flange (21), a second flange (22) and a boost ring (23), wherein the first flange (21) is sleeved on the outer periphery of the first connecting section (8) of the cylinder (1), the second flange (22) is sleeved on the outer periphery of the second connecting section (10) of the cylinder (1), and the boost ring (23) is arranged at a position where the first flange (21) is connected to the first connecting section (8) and / or at a position where the second flange (22) is connected to the second connecting section (10).

7. The check valve with flexible adjustment function according to claim 1, characterized in that: The valve cover (3) is a flexible structure, the valve seat (4) is a rigid structure, and the cylinder (1) is made of rubber material; when the fluid enters the cavity (6) from the valve seat (4), the valve plate (5) abuts against the valve cover (3) to close the channel at the valve cover (3).

8. The check valve with flexible adjustment function according to claim 1, characterized in that: The valve cover (3) comprises a first outer ring body (11), a first connecting rib (12) and a first inner ring body (13); the first outer ring body (11) is located on the outer periphery of the first inner ring body (13); the first connecting rib (12) is connected between the first outer ring body (11) and the first inner ring body (13); there are a plurality of first connecting ribs (12), the plurality of first connecting ribs (12) are arranged at intervals along the circumferential direction, and a first channel (17) for fluid to flow through is formed between two adjacent first connecting ribs (12), i.e., a channel at the valve cover (3); The valve seat (4) comprises a second outer ring body (14), a second connecting rib (15) and a second inner ring body (16), wherein the second outer ring body (14) is located on the outer periphery of the second inner ring body (16), and the second connecting rib (15) is connected between the second outer ring body (14) and the second inner ring body (16), and there are a plurality of second connecting ribs (15), and the plurality of second connecting ribs (15) are arranged at intervals in the circumferential direction, and a second channel (25) for fluid to flow through is formed between two adjacent second connecting ribs (15).

9. The check valve with flexible adjustment function according to claim 8, characterized in that: A first inclined surface (18) is also formed on the axial end surface of the first outer ring body (11) facing the valve plate (5); the direction from the radial inner end to the radial outer end of the first inclined surface (18) along the axial direction of the valve cover (3) is a first direction; the direction in which the airflow impacts the valve plate (5) from the valve cover (3) toward the cavity (6) is along the first direction; a second inclined surface (19) is formed at the radial outer end of the valve plate (5) in the direction toward the first outer ring body (11); when the valve plate (5) is connected to the valve cover (3), the second inclined surface (19) is arranged in close contact with the first inclined surface (18).

10. A hydraulic system, characterized in that: A check valve with flexible adjustment function comprising any one of claims 1-9.

Images