Adjustable one-way valve

Abstract

The adjustable one-way valve comprises a shell, a first pipeline, a second pipeline, a supporting rod piece, a non-return baffle, an adjusting support, a sliding block, a fixing piece, an elastic piece and an extrusion piece, an opening is formed in one end of the first pipeline, and the shell communicates with the first pipeline and the second pipeline; one end of the supporting rod piece is connected to the first pipeline, one side edge of the non-return baffle is rotationally connected to the other end of the supporting rod piece, and the non-return baffle is located between the first pipeline and the second pipeline; the adjusting support comprises a sliding section extending in the second preset direction, the sliding block is in sliding connection with the sliding section, and the fixing piece is used for limiting or releasing limiting of sliding of the sliding block in the second preset direction relative to the sliding section; the extrusion part is slidably connected with the sliding block and elastically connected with the sliding block through an elastic part, the extrusion part slides in the first preset direction relative to the sliding block, and the extrusion part is located on the side, away from the first pipeline, of the non-return baffle.

Description

Technical Field

[0001] This application relates to the technical field of check valves, and specifically relates to an adjustable check valve. Background Art

[0002] As a key control component in hydraulic and pneumatic systems, the core function of a check valve is to achieve unidirectional conduction of fluid. A typical structure consists of three major precision components: the valve sleeve serves as the guiding housing for the fluid passage, the valve core serves as the opening and closing actuator, and the spring serves as the reset power source. In terms of the working mechanism, the valve core exhibits a dual-acting surface force characteristic: the front end is directly affected by the fluid pressure, and the rear end bears the spring pre-tightening force. There are two typical operating conditions during system operation: Locked state: When the axial thrust generated by the fluid pressure is not sufficient to overcome the preset resistance of the spring, the valve core remains in sealed contact with the valve seat under the action of the spring, forming a reliable cut-off flow;

[0003] Conduction state: When the driving force formed by the fluid pressure gradient exceeds the spring preload, the valve core generates an axial displacement to establish a flow path, and at this time, the fluid can freely pass along the designed direction. The mechanical characteristics of this type of valve are as follows: the fluid power and the spring resistance act collinearly in the opposite direction, and this force balance design makes it particularly suitable for high-pressure working conditions (usually > 10 MPa). In engineering practice, it is necessary to optimize the valve response characteristics by accurately calculating the ratio of the spring stiffness to the valve core bearing area according to the system pressure level, flow characteristics, and medium properties.

[0004] In the low-pressure pneumatic field, the "valve core" of the existing check valve is a thin steel plate baffle. The upper edge position of the thin steel plate baffle is installed through a round hole of a tape measure and is connected to the valve sleeve through a pin shaft, and the cut-off effect on the fluid is achieved by its own gravity or an additional spring force. The main problems of this kind of check valve are as follows: The valve that cuts off by its own gravity can only be used in occasions where the baffle gravity is effective, such as in the vertically upward direction, and cannot be used in the vertically downward direction; The valve that cuts off by spring force has to overcome a large spring force and is not suitable for low-pressure occasions.

[0005] That is, the adaptability of the check valve in the prior art is not high. Summary of the Invention

[0006] The embodiments of this application provide an adjustable check valve, aiming to solve the problem of low adaptability of the check valve in the prior art.

[0007] To solve the above problems, in a first aspect, this application provides an adjustable check valve, which includes a housing, a first pipeline, a second pipeline, a support member, a check baffle, an adjustment support, a slider, a fixing member, an elastic member, and an extrusion member;

[0008] The housing is hollow. The first pipe and the second pipe both extend along a first preset direction. One end of the first pipe is provided with an opening, and the housing communicates with the first pipe and the second pipe respectively;

[0009] One end of the support rod member is connected to the first pipe, and one side edge of the check baffle is rotatably connected to the other end of the support rod member. The check baffle is located between the first pipe and the second pipe;

[0010] An adjusting support is provided protruding from the inner side of the housing. The adjusting support includes a sliding section extending along a second preset direction. The slider is slidably connected to the sliding section, and the fixing member is used to restrict or release the restriction of the slider sliding relative to the sliding section along the second preset direction;

[0011] The pressing member is slidably connected to the slider. The pressing member and the slider are elastically connected by the elastic member. The pressing member slides relative to the slider along the first preset direction. The pressing member is located on the side of the check baffle away from the first pipe,

[0012] When the thrust generated by the gas flow in the first pipe is less than the resultant force of the self - gravity of the check baffle and the elastic force generated by the pressing member, the check baffle approaches the opening to block the opening; when the thrust generated by the gas flow in the first pipe is greater than the resultant force of the self - gravity of the check baffle and the elastic force generated by the pressing member, the check baffle moves away from the opening to release the blockage of the opening.

[0013] Optionally, the elastic member is a spring, the pressing member is a screw, and the fixing member is a nut. One end of the pressing member sequentially passes through the elastic member and the slider and is threadedly connected to the fixing member. When the fixing member is rotated, the elastic member is compressed or stretched.

[0014] Optionally, the adjustable one - way valve includes a fixing screw. Grooves are recessed on both sides of the slider. The sliding section includes two sliding rods arranged side by side and at intervals. The two sliding rods are respectively inserted into the two grooves of the slider. A threaded hole is provided on one side wall of the groove, and the fixing screw is screwed into the threaded hole to press the sliding rod against the other side wall of the groove to restrict the sliding between the sliding section and the slider.

[0015] Optionally, a first sealing ring is sleeved on the edge of the opening. When the thrust generated by the gas flow in the first pipe is less than the resultant force of the self - gravity of the check baffle and the elastic force generated by the pressing member, the check baffle adheres to the first sealing ring to block the opening.

[0016] Optionally, the support rod member is an L-shaped rod, and a pin shaft is pivotally connected to the other end of the support rod member. Locking pins are respectively inserted into both ends of the pin shaft. The check baffle includes a connecting rod and a baffle portion connected to one end of the connecting rod. The baffle portion is used to block the opening, and the other end of the connecting rod is rotatably connected to the pin shaft.

[0017] Optionally, the housing includes a first frame and a second frame. The first frame is fixed to the side wall of the first pipe, and the second frame is fixed to the side wall of the second pipe. The first frame and the second frame are detachably connected.

[0018] Optionally, a second sealing ring is provided between the first frame and the second frame.

[0019] Optionally, the adjusting support includes an installation section that extends along the first preset direction. The installation section is connected to the inner top of the first frame through a fixing bolt and a fixing nut.

[0020] Optionally, a chute extending along the first preset direction is provided on the installation section. The bolt is inserted into the chute and slides relative to the chute. When the fixing nut rotates, the sliding of the fixing bolt relative to the chute is restricted or the sliding of the fixing bolt relative to the chute is released.

[0021] The beneficial effects of this application are as follows: Different from the prior art, this application provides an adjustable one-way valve, which includes a housing, a first pipe, a second pipe, a support rod member, a check baffle, an adjustment support, a slider, a fixing member, an elastic member, and an extrusion member; the housing is hollow, the first pipe and the second pipe both extend along a first preset direction, one end of the first pipe is provided with an opening, and the housing communicates with the first pipe and the second pipe respectively; one end of the support rod member is connected to the first pipe, one side edge of the check baffle is rotatably connected to the other end of the support rod member, and the check baffle is located between the first pipe and the second pipe; an adjustment support extends out from the inner side of the housing, the adjustment support includes a sliding section extending along a second preset direction, the slider is slidably connected to the sliding section, and the fixing member is used to restrict or release the restriction of the slider sliding relative to the sliding section along the second preset direction; the extrusion member is slidably connected to the slider, the extrusion member is elastically connected to the slider through the elastic member, the extrusion member slides relative to the slider along the first preset direction, and the extrusion member is located on the side of the check baffle away from the first pipe. When the thrust generated by the gas flow in the first pipe is less than the resultant force of the self-gravity of the check baffle and the elastic force generated by the extrusion member, the check baffle approaches the opening to block the opening; when the thrust generated by the gas flow in the first pipe is greater than the resultant force of the self-gravity of the check baffle and the elastic force generated by the extrusion member, the check baffle moves away from the opening to release the blockage of the opening. In this application, by adjusting the fixing member to change the length of the elastic member, the pre-acting force applied to the check baffle is changed, and by sliding up and down to change the position of the extrusion member, the moment of the pre-acting force applied to the check baffle is changed, so that the adjustable one-way valve is applicable to various scenarios and the applicability of the one-way valve is improved. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of this application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic structural diagram of an embodiment of an adjustable one-way valve provided by an embodiment of this application;

[0024] Figure 2 It is a schematic structural diagram of a support rod member and a check baffle in an embodiment of an adjustable one-way valve provided by an embodiment of this application;

[0025] Figure 3 It is a partial schematic structural diagram of a support rod member and a check baffle in an embodiment of an adjustable one-way valve provided by an embodiment of this application;

[0026] Figure 4It is the first structural schematic diagram of the check baffle in an embodiment of an adjustable one-way valve provided by an embodiment of the present application;

[0027] Figure 5 It is the second structural schematic diagram of the check baffle in an embodiment of an adjustable one-way valve provided by an embodiment of the present application;

[0028] Figure 6 It is the structural schematic diagram of the support rod member and the check baffle installed on the first pipe in an embodiment of an adjustable one-way valve provided by an embodiment of the present application;

[0029] Figure 7 It is the first structural schematic diagram of the first pipe in an embodiment of an adjustable one-way valve provided by an embodiment of the present application;

[0030] Figure 8 It is the second structural schematic diagram of the first pipe in an embodiment of an adjustable one-way valve provided by an embodiment of the present application;

[0031] Figure 9 It is the structural schematic diagram of the first frame installed on the first pipe in an embodiment of an adjustable one-way valve provided by an embodiment of the present application;

[0032] Figure 10 It is the first structural schematic diagram of the support rod member in an embodiment of an adjustable one-way valve provided by an embodiment of the present application;

[0033] Figure 11 It is the second structural schematic diagram of the support rod member in an embodiment of an adjustable one-way valve provided by an embodiment of the present application;

[0034] Figure 12 It is the first structural schematic diagram of the slider, the extrusion member and the support rod member in an embodiment of an adjustable one-way valve provided by an embodiment of the present application;

[0035] Figure 13 It is the second structural schematic diagram of the slider, the extrusion member and the support rod member in an embodiment of an adjustable one-way valve provided by an embodiment of the present application;

[0036] Figure 14 It is the structural schematic diagram of the installation section connected to the first frame by fixing bolts and fixing nuts in an embodiment of an adjustable one-way valve provided by an embodiment of the present application;

[0037] Figure 15 It is the structural schematic diagram of the second frame and the second pipe in an embodiment of an adjustable one-way valve provided by an embodiment of the present application;

[0038] Figure 16 It is the force schematic diagram of an embodiment of an adjustable one-way valve provided by an embodiment of the present application. Detailed implementation manners

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present application.

[0040] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0041] In the present application, the term "exemplary" is used to mean "serving as an example, illustration, or description". Any embodiment described as "exemplary" in the present application is not necessarily to be construed as more preferred or more advantageous than other embodiments. In order for any person skilled in the art to implement and use the present application, the following description is provided. In the following description, details are set forth for the purpose of explanation. It should be understood that those skilled in the art can realize that the present application can be implemented without using these specific details. In other instances, well-known structures and processes are not elaborated in detail to avoid unnecessary details from obscuring the description of the present application. Therefore, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed in the present application.

[0042] An embodiment of the present application provides an adjustable one-way valve. The adjustable one-way valve includes a housing, a first pipe, a second pipe, a support rod member, a check baffle, an adjustment support, a slider, a fixing member, an elastic member, and a pressing member; the housing is hollow, the first pipe and the second pipe both extend along a first preset direction, one end of the first pipe is provided with an opening, and the housing is respectively communicated with the first pipe and the second pipe; one end of the support rod member is connected to the first pipe, one side edge of the check baffle is rotatably connected to the other end of the support rod member, and the check baffle is located between the first pipe and the second pipe; an adjustment support extends out from the inner side of the housing, the adjustment support includes a sliding section extending along a second preset direction, the slider is slidably connected to the sliding section, and the fixing member is used to restrict or release the restriction of the slider sliding relative to the sliding section along the second preset direction; the pressing member is slidably connected to the slider, the pressing member is elastically connected to the slider through the elastic member, the pressing member slides relative to the slider along the first preset direction, the pressing member is located on the side of the check baffle away from the first pipe, when the thrust generated by the gas flow in the first pipe is less than the resultant force of the self-gravity of the check baffle and the elastic force generated by the pressing member, the check baffle approaches the opening to block the opening; when the thrust generated by the gas flow in the first pipe is greater than the resultant force of the self-gravity of the check baffle and the elastic force generated by the pressing member, the check baffle moves away from the opening to release the blockage of the opening. The following will be described in detail respectively.

[0043] Combined with Figures 1 - 16, in the embodiment of the present application, the adjustable check valve 100 includes a housing 11, a first pipe 111, a second pipe 112, a support rod member 12, a check baffle 14, an adjustment support 13, a slider 16, a fixing member 152, an elastic member 158, and an extrusion member 151. The housing 11 is hollow, the first pipe 111 and the second pipe 112 both extend along a first preset direction, one end of the first pipe 111 is provided with an opening 115, and the housing 11 communicates with the first pipe 111 and the second pipe 112 respectively. One end of the support rod member 12 is connected to the first pipe 111, and one side edge of the check baffle 14 is rotatably connected to the other end of the support rod member 12. The check baffle 14 is located between the first pipe 111 and the second pipe 112. An adjustment support 13 extends out from the inner side of the housing 11. The adjustment support 13 includes a sliding section 131 extending along a second preset direction. The slider 16 is slidably connected to the sliding section 131. The fixing member 152 is used to restrict or release the restriction of the slider 16 from sliding along the second preset direction relative to the sliding section 131. The extrusion member 151 is slidably connected to the slider 16. The extrusion member 151 and the slider 16 are elastically connected by an elastic member 158. The extrusion member 151 slides relative to the slider 16 along the first preset direction. The extrusion member 151 is located on the side of the check baffle 14 away from the first pipe 111. When the thrust generated by the gas flow in the first pipe 111 is less than the resultant force of the self-gravity of the check baffle 14 and the elastic force generated by the extrusion member 151, the check baffle 14 approaches the opening 115 to block the opening 115, and the adjustable check valve 100 is disconnected. When the thrust generated by the gas flow in the first pipe 111 is greater than the resultant force of the self-gravity of the check baffle 14 and the elastic force generated by the extrusion member 151, the check baffle 14 moves away from the opening 115 to release the blockage of the opening 115, and the adjustable check valve 100 is closed.

[0044] In the present application, the slider 16 can slide up and down along the adjustment support 13. The extrusion member 151 and the slider 16 are elastically connected by an elastic member 158. The fixing member 152 can restrict or release the restriction of the slider 16 from sliding along the second preset direction relative to the sliding section 131. By adjusting the fixing member 152 to change the length of the elastic member 158, the pre-acting force applied to the check baffle 14 is changed. By sliding up and down to change the position of the extrusion member 151, the moment of the pre-acting force applied to the check baffle 14 is changed, so that the adjustable check valve 100 is applicable to various scenarios, and the applicability of the adjustable check valve 100 is improved.

[0045] In the embodiment of the present application, the first preset direction is the horizontal direction, the second preset direction is the vertical direction, and the first preset direction and the second preset direction are perpendicular to each other.

[0046] In the embodiment of the present application, the thrust generated by the gas flow in the first pipeline 111 is along the first preset direction, and the distance from the acting point of the thrust generated by the gas flow in the first pipeline 111 on the check baffle 14 to the other end of the support rod member 12 is greater than the distance from the acting point of the elastic force generated by the pressing member 151 on the check baffle 14 to the other end of the support rod member 12.

[0047] In the embodiment of the present application, a first sealing ring 116 is sleeved on the edge of the opening 115. When the thrust generated by the gas flow in the first pipeline 111 is less than the resultant force of the self-gravity of the check baffle 14 and the elastic force generated by the pressing member 151, the check baffle 14 adheres to the first sealing ring 116 to block the opening 115.

[0048] In the embodiment of the present application, the elastic member 158 is a spring, the pressing member 151 is a screw, and the fixing member 152 is a nut. One end of the pressing member 151 sequentially passes through the elastic member 158 and the slider 16 and is threadedly connected to the fixing member 152. When the fixing member 152 is rotated, the elastic member 158 is compressed or stretched.

[0049] In the embodiment of the present application, the housing 11 includes a first frame 113 and a second frame 114. The first frame 113 is fixed to the side wall of the first pipeline 111, and the second frame 114 is fixed to the side wall of the second pipeline 112. The first frame 113 and the second frame 114 are detachably connected. Specifically, the first frame 113 is welded to the side wall of the first pipeline 111, and the second frame 114 is welded to the side wall of the second pipeline 112.

[0050] In the embodiment of the present application, a second sealing ring 117 is provided between the first frame 113 and the second frame 114.

[0051] Combined Figures 2 to 9 with, in the embodiment of the present application, the support rod member 12 is an L-shaped rod. A pin shaft 122 is pivotally connected to the other end of the support rod member 12. Locking pins 123 are respectively inserted at both ends of the pin shaft 122. The check baffle 14 includes a connecting rod 141 and a baffle portion 142 connected to one end of the connecting rod 141. The baffle portion 142 is used to block the opening 115, and the other end of the connecting rod 141 is rotatably connected to the pin shaft 122.

[0052] Combined Figures 10 to 15 with, in the embodiment of the present application, the adjustable one-way valve 100 includes a fixing screw 159. Grooves 161 are recessed on both sides of the slider 16. The sliding section 131 includes two sliding rods 139 arranged in parallel and spaced apart. The two sliding rods 139 are respectively inserted into the two grooves 161 of the slider 16. A threaded hole 162 is provided on one side wall of the groove 161. The fixing screw 159 is screwed into the threaded hole 162 to press the sliding rod 139 against the other side wall of the groove 161 to limit the sliding between the sliding section 131 and the slider 16.

[0053] In the embodiment of the present application, the adjusting support 13 includes an installation section 132. The installation section 132 extends along a first preset direction. The installation section 132 is connected to the inner side of the top of the first frame 113 through a fixing bolt 171 and a fixing nut 172.

[0054] In the embodiment of the present application, a chute 133 extending along the first preset direction is provided on the installation section 132. The fixing bolt 171 is inserted into the chute 133 and slides relative to the chute 133. When the fixing nut 172 rotates, the sliding of the fixing bolt 171 relative to the chute 133 is restricted or the sliding of the fixing bolt 171 relative to the chute 133 is released.

[0055] The adjusting support 13 of the present application is an L-shaped bracket. A vertically extending chute and a chute with a large half-length in the horizontal direction are provided in the middle of the L-shaped bracket, but they are connected together at the last position. The chute in the horizontal direction is used to connect with the first frame 1. The length of the chute can be adjusted within a certain range to change the installation position, so that the pre-acting force applied by the elastic member 158 to the check baffle can be changed. Generally speaking, it is to change the magnitude of the force against the check baffle 14, thereby realizing the first adjustment of the pre-acting force. Because there are many influencing factors in mechanical installation, assuming that a non-laterally adjustable structure is not made, once the parts are processed and formed, the magnitude of the force applied to the check baffle 14 is basically fixed, and the adjustment effect of the valve will be greatly reduced.

[0056] As Figure 16 shown, the working principle of the adjustable check valve 100 of the present application is as follows:

[0057] As shown in the figure, the check baffle 14 is subject to gravity mg, gas thrust F1, and elastic acting force F2 generated by the pressing member. The component forces of the elastic acting force F2 are F21 and F22 respectively, and the component forces of the gas thrust F1 are F11 and F12 respectively. For the check baffle 14 to be in balance, it is required that: F21×L2 + mgsina×L3 = F11×L1, that is, F1 = L2 / L1×F2 + L3 / L1×mg×tana.

[0058] In the embodiment of the present application, the thrust generated by the gas flow in the first pipeline 111 acts along the first preset direction. The distance from the acting point of the thrust generated by the gas flow in the first pipeline 111 on the check baffle 14 to the pin shaft 122 is L1. The distance from the acting point of the elastic acting force generated by the pressing member 151 on the check baffle 14 to the pin shaft 122 is L2. The distance L1 from the acting point of the thrust generated by the gas flow in the first pipeline 111 on the check baffle 14 to the pin shaft 122 is greater than the distance L2 from the acting point of the elastic acting force generated by the pressing member 151 on the check baffle 14 to the pin shaft 122. The distance from the gravity acting point of the check baffle 14 to the pin shaft 122 is L3.

[0059] When the rotation angle α of the check baffle 14 = 0°, F1 = L2 / L1×F2. Therefore, the purpose of opening the adjustable one-way valve 100 with a very small gas thrust can be achieved by adjusting the length of L2. Then, as the angle increases, the gravity of the check baffle 14 is added to the balance, keeping α at a certain angle.

[0060] When the adjustable one-way valve 100 is arranged downward, since the check baffle 14 is opened by gravity, at this time, applying a balancing force F2 to the check baffle 14 can make the check baffle 14 in a state of closing the valve.

[0061] When the adjustable one-way valve 100 is arranged vertically upward, the gas needs to overcome the gravity to open the check baffle 14. However, since the material used for the check baffle 14 is a light thin-wall material, and the force arm of the gas thrust is greater than the gravity force arm, it can also be easily opened.

[0062] Other setting states of the adjustable one-way valve 100 are all in the intermediate state between vertically downward and vertically upward, so the one-way conduction function of a small pressure can also be realized.

[0063] The application scenario of the adjustable one-way valve 100 of the present application is micro low pressure, such as the pressure difference caused by thermal expansion and contraction. If the acting force of the elastic member 158 is too large, then the valve basically fails. The adjustable one-way valve 100 of the present application solves the check valve problem in a state of extremely low pressure; the pre-acting force of the elastic member 158 can be adjusted, and the acting moment of the elastic member 158 can be adjusted. When the force arm remains unchanged, reducing the acting force of the elastic member 158 can further reduce the air pressure by several times.

[0064] Suppose we regard the Figure 16 direction as 0°. The adjustable one-way valve 100 is very easy to apply in this direction. Then, slowly rotate counterclockwise by 90°. We can find that even without the acting force of the elastic member 158, the check baffle 14 will slowly press against the pipe orifice, using the gravity of the check baffle 14 itself to form a check valve phenomenon. At 90°, this pressure reaches the maximum. Under the pressure of micro low pressure, this force is very likely to be the force we hope to use. Then, rotate counterclockwise from 90° to 180°. The influence of gravity gradually weakens until it disappears. Then, we need the elastic member 158 to provide a restoring force for the check baffle 14 to ensure that the air flow does not flow reversely when there is no leakage. Then, during the process of rotating counterclockwise from 180° to 270°, the check baffle 14 slowly leaves the air outlet of the pipe under the action of gravity. At this time, if there is no acting force of the elastic member 158 to offset the influence of gravity, the sealing function of the valve will fail. The same principle applies within the range of 270° to 360° of the valve. Therefore, the adjustable one-way valve 100 of the present application can be used at all angles.

[0065] Different from the prior art, the present application provides an adjustable check valve, which includes a housing, a first pipe, a second pipe, a support rod member, a check baffle, an adjustment support, a slider, a fixing member, an elastic member, and an extrusion member; the housing is hollow, the first pipe and the second pipe both extend along a first preset direction, one end of the first pipe is provided with an opening, and the housing is respectively communicated with the first pipe and the second pipe; one end of the support rod member is connected to the first pipe, one side edge of the check baffle is rotatably connected to the other end of the support rod member, and the check baffle is located between the first pipe and the second pipe; an adjustment support extends out from the inner side of the housing, the adjustment support includes a sliding section extending along a second preset direction, the slider is slidably connected to the sliding section, and the fixing member is used to restrict or release the restriction of the slider sliding relative to the sliding section along the second preset direction; the extrusion member is slidably connected to the slider, the extrusion member is elastically connected to the slider through the elastic member, the extrusion member slides relative to the slider along the first preset direction, the extrusion member is located on the side of the check baffle away from the first pipe, when the thrust generated by the gas flow in the first pipe is less than the resultant force of the self-gravity of the check baffle and the elastic force generated by the extrusion member, the check baffle approaches the opening to block the opening; when the thrust generated by the gas flow in the first pipe is greater than the resultant force of the self-gravity of the check baffle and the elastic force generated by the extrusion member, the check baffle moves away from the opening to release the blockage of the opening. The present application changes the pre-acting force applied to the check baffle by adjusting the fixing member to change the length of the elastic member, and changes the position of the extrusion member by sliding up and down, so as to change the moment of the pre-acting force applied to the check baffle, making the adjustable check valve applicable to various scenarios and improving the applicability of the adjustable check valve.

[0066] In specific implementation, each of the above units or structures can be implemented as an independent entity, or can be arbitrarily combined and implemented as the same or several entities. For the specific implementation of each of the above units or structures, reference can be made to the foregoing method embodiments, which will not be elaborated herein.

[0067] The above has introduced in detail an adjustable check valve provided by an embodiment of the present application. Specific examples are used in this article to elaborate on the principle and embodiments of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific embodiments and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. An adjustable one-way valve, characterized in that: The adjustable one-way valve comprises a housing, a first pipeline, a second pipeline, a support rod, a check baffle, an adjustment support, a slider, a fixing member, an elastic member and an extrusion member; The shell is hollow, the first pipe and the second pipe both extend along a first preset direction, one end of the first pipe is provided with an opening, and the shell is connected to the first pipe and the second pipe respectively; One end of the support rod is connected to the first pipe, one side edge of the non-return baffle is rotatably connected to the other end of the support rod, and the non-return baffle is located between the first pipe and the second pipe; An adjustment support is extended from the inner side of the housing, the adjustment support includes a sliding section extending along a second preset direction, the slider is slidably connected to the sliding section, and the fixing member is used to restrict or release the restriction on the sliding of the slider relative to the sliding section along the second preset direction; The extrusion member is slidably connected to the slider, the extrusion member and the slider are elastically connected via the elastic member, the extrusion member slides relative to the slider along the first preset direction, and the extrusion member is located on a side of the non-return baffle away from the first pipe. When the thrust generated by the gas flow in the first pipeline is less than the combined force of the self-weight of the check baffle and the elastic force generated by the extrusion member, the check baffle approaches the opening to block the opening; when the thrust generated by the gas flow in the first pipeline is greater than the combined force of the self-weight of the check baffle and the elastic force generated by the extrusion member, the check baffle moves away from the opening to release the blockage of the opening; A first sealing ring is sleeved on the edge of the opening. When the thrust generated by the gas flow in the first pipe is smaller than the combined force of the self-weight of the check baffle and the elastic force generated by the extrusion member, the check baffle is attached to the first sealing ring to block the opening.

2. The adjustable one-way valve according to claim 1, characterized in that: The elastic member is a spring, the extrusion member is a screw, the fixing member is a nut, one end of the extrusion member passes through the elastic member and the slider in sequence and is threadedly connected to the fixing member, and when the fixing member is rotated, the elastic member is compressed or pulled.

3. The adjustable one-way valve according to claim 1, characterized in that: The adjustable one-way valve includes a fixing screw, grooves are recessed on both sides of the slider, the sliding section includes two sliding rods arranged in parallel and at intervals, the two sliding rods are respectively inserted into the two grooves of the slider, one side wall of the groove is provided with a threaded hole, the fixing screw is screwed into the threaded hole to squeeze the sliding rod against the other side wall of the groove to limit the sliding between the sliding section and the slider.

4. The adjustable one-way valve according to claim 1, characterized in that: The support rod is an L-shaped rod, the other end of which is pivotally connected to a pin shaft, and locking pins are respectively inserted at both ends of the pin shaft. The non-return baffle includes a connecting rod and a baffle portion connected to one end of the connecting rod, the baffle portion is used to block the opening, and the other end of the connecting rod is rotatably connected to the pin shaft.

5. The adjustable one-way valve according to claim 1, characterized in that: The shell includes a first frame and a second frame, the first frame is fixed to the side wall of the first pipe, the second frame is fixed to the side wall of the second pipe, and the first frame and the second frame are detachably connected.

6. The adjustable one-way valve according to claim 5, characterized in that: A second sealing ring is provided between the first frame and the second frame.

7. The adjustable one-way valve according to claim 6, characterized in that: The adjustment support includes a mounting section, which extends along the first preset direction and is connected to the top inner side of the first frame through a fixing bolt and a fixing nut.

8. The adjustable one-way valve according to claim 7, characterized in that: The mounting section is provided with a slide groove extending along a first preset direction, the bolt is inserted into the slide groove and slides relative to the slide groove, and when the fixing nut rotates, the sliding of the fixing bolt relative to the slide groove is restricted or the sliding of the fixing bolt relative to the slide groove is released.

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