Pressure-adjustable one-way valve for pipeline
By introducing nut plugs into the check valve to adjust spring compression and valve core design, the problem of unadjustable backflow pressure of the check valve is solved, adaptive adjustment and buffer protection under different pressure environments are achieved, and the service life of the valve core is extended.
Patent Information
- Application Number
- CN202422120130.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-08-30
AI Technical Summary
Existing check valves cannot adjust the pressure of the backflow, and the backflow speed is too fast, resulting in damage to the spring and valve core.
A pipeline pressure-adjustable check valve is designed. By setting a threaded connection nut plug in the inner cavity of the valve body shell, the spring compression is adjusted by rotating the "one" groove, changing the elastic force of the spring, thereby adjusting the pressure of the liquid opening valve core, and providing buffering through the upper narrow and lower cylindrical structure of the valve core, reducing the collision between the liquid and the valve core.
It realizes adaptive adjustment of the valve core opening pressure in different inlet pressure environments, reduces collision between the valve core and the liquid, reduces the risk of damage, and improves the service life of the check valve.
Smart Images
Figure CN223136522U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of check valves, in particular to an adjustable-pressure check valve for pipelines. Background Technique
[0002] A check valve, also known as a plug-type check valve, is a component that only allows fluid to pass through in one direction. Its structure mainly consists of a valve body, a needle valve, a spring, a sealing ring, etc. In a hydraulic system, the check valve is usually used as a safety valve to prevent the hydraulic system from generating overpressure in case of emergencies and protect the safety of the system. However, there are some drawbacks in its application. The check valve cannot adjust the pressure of reverse flow, and too fast reverse flow speed will damage the spring and the valve core.
[0003] Therefore, an adjustable-pressure check valve for pipelines is needed to solve the technical defects mentioned in the above technology. Content of the Utility Model
[0004] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide an adjustable-pressure check valve for pipelines, which solves the problems that the check valve cannot adjust the pressure of reverse flow of the check valve, and too fast reverse flow speed will damage the spring and the valve core.
[0005] To achieve the above purpose, the utility model provides the following technical solution: an adjustable-pressure check valve for pipelines, including a valve body housing, the inner side surface of the inner cavity of the valve body housing is provided with threads, the top end of the valve body housing is provided with a liquid inlet, the top end of the inner cavity of the valve body housing is provided with a valve core, the inner cavity of the valve core is movably connected with a spring, the lower inner cavity of the valve body housing is threadedly connected with a nut plug, the nut plug can adjust the spring compression, a "one"-shaped groove is opened at the central axis position of the bottom end surface of the nut plug, a "one"-shaped groove is opened at the central axis position of the bottom end surface of the nut plug, the center of the nut plug is communicated with a liquid outlet, and the liquid outlet is arranged at the bottom of the valve body housing in a horn shape.
[0006] Preferably, the valve core is in a cylindrical shape with a narrow upper part and a wide lower part, a flow channel hole is arranged in the narrow upper part of the valve core, and the inner cavity of the wide lower part of the valve core is a cavity for placing the spring.
[0007] Preferably, the top end of the narrow upper part of the valve core is chamfered, the middle position of the valve core is rounded, the wide lower part of the valve core is attached to the inner cavity of the valve body housing and is in a sliding connection, and the inner cavity of the narrow upper part of the valve core is communicated with the inner cavity of the wide lower part of the valve core.
[0008] Preferably, the flow channel in the inner cavity of the valve core extends to the inside of the top end of the spring and is close to the inner side of the top end of the spring.
[0009] Preferably, the spring is made of spring steel, and four groups of flow channel holes are arranged.
[0010] Compared with the prior art, the present utility model provides an adjustable-pressure one-way valve for pipelines, which has the following
[0011] Advantageous effects:
[0012] In the present utility model, threads are provided on the inner side surface of the inner cavity of the valve body housing, and a nut plug is threadedly connected to the lower inner cavity. An "I"-shaped groove is provided on the central axis of the nut plug. By rotating the "I"-shaped groove, the nut plug can rotate and compress the spring, thereby changing the elastic force of the spring, and thus the pressure for the liquid to open the valve core will also change relatively. The one-way valve is improved to adjust the pressure for opening the valve core by adjusting the nut plug, and can be applicable to different inlet liquid pressure environments.
[0013] In the present utility model, four flow channels are provided on the valve core, and the valve core is arranged in a cylindrical shape with a narrower upper part and a wider lower part. When the pressure of the liquid entering the liquid inlet becomes smaller, due to the gap between the narrower upper part of the valve core and the inner cavity of the valve body housing, the liquid in the gap can generate a certain buffering force on the valve core, preventing the valve core from being damaged by a strong collision with the liquid inlet. Moreover, the rotation and compression of the spring by the nut plug shorten the moving distance for the valve core to open, reducing the force of collision with the liquid inlet, and also reducing the possibility of damaging the valve core. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 is a schematic structural diagram of the present utility model;
[0015] Figure 2 is an exploded view of the present utility model;
[0016] Figure 3 is a schematic diagram of a partial structure of the present utility model;
[0017] Figure 4 is a bottom view of the nut plug of the present utility model.
[0018] In the figure: 1, valve body housing; 2, valve core; 3, spring; 4, nut plug; 5, liquid inlet; 6, flow channel hole; 7, "I"-shaped groove; 8, liquid outlet. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] The following further describes in detail the embodiments of the present utility model in conjunction with the drawings and examples. The following examples are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.
[0020] In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model 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 utility model.
[0021] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and defined, the terms "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0022] Please refer to Figures 1-3 , a pipeline adjustable pressure check valve, which includes a valve body housing 1. The inner side surface of the inner cavity of the valve body housing 1 is provided with threads. The top end of the valve body housing 1 is provided with a liquid inlet 5. The top end of the inner cavity of the valve body housing 1 is provided with a valve core 2. The valve core 2 is a cylindrical shape with a narrow upper part and a wide lower part. The narrow part of the valve core 2 is provided with a flow channel hole 6. The inner cavity of the valve core 2 is movably connected with a spring 3. The inner cavity of the wide lower part of the valve core 2 is a cavity for placing the spring 3. The lower inner cavity of the valve body housing 1 is threadedly connected with a nut plug 4. The plug nut 4 can adjust the compression of the spring 3. The center axis position of the bottom end surface of the nut plug 4 is provided with a "one" character groove 7. The hollow inner cavity opened on the nut plug 4 is a liquid outlet 8, and the liquid outlet 8 is arranged at the bottom of the valve body housing 1 in a flared shape.
[0023] It should be additionally noted that the valve core 2 arranged in the inner cavity of the valve body housing 1 is connected to the liquid inlet 5 through the flow channel hole 6. The valve core 2 is a cylindrical part with a narrow upper part and a wide lower part that can move, and can control the opening and closing of the incoming liquid. The spring 3 is the power source for the opening and closing of the valve core 2. When the pressure of the liquid entering the liquid inlet 5 is greater than the reaction force of the spring 3 in the closed state, the valve core 2 moves along the direction of the liquid outlet 8, and the spring 3 is compressed to open the switch. The nut plug 4 can be rotated in the inner cavity of the valve body housing 1 to adjust the compression of the spring 3, thereby controlling the pressure for opening the valve core 2. Rotating the "one" character groove 7 clockwise drives the nut plug 4 to rotate into the inner cavity of the valve body housing 1, thereby adjusting the compression of the spring 3. The reaction force exerted by the spring 3 on the valve core 2 becomes larger, and the pressure required for the incoming liquid is also larger compared to the pressure required for the uncompressed spring 3, avoiding excessive damage to the spring 3 and the valve core 2 due to excessive pressure of the liquid entering the liquid inlet 8.
[0024] The head of the narrow upper part of the valve core 2 is set to be conical, the middle position of the valve core 2 is set to be rounded, the wide lower part of the valve core 2 is attached to the inner cavity of the valve body housing 1 and is in sliding connection, and the inner cavity of the narrow upper part of the valve core 2 is communicated with the inner cavity of the wide lower part of the valve core 2.
[0025] It should be further supplemented that the narrow upper part of the valve core 2 is set to be conical, and the conical part of the valve core 2 is used to resist the inner side of the liquid inlet 5 provided on the valve body housing 1, which plays a role in limiting the valve core 2 when the one-way valve is closed. The middle position of the valve core 2 is set to be rounded, so that when the one-way valve is opened by the external pressure of the liquid entering, the valve core 2 will not move too long a distance, and a buffer is obtained when the valve core 2 is closed when the external pressure decreases.
[0026] The flow channel in the inner cavity of the valve core 2 extends to the inside of the top end of the spring 3 and is close to the inner side of the top end of the spring 3; the spring 3 is made of spring steel, and there are four groups of flow channel holes 6.
[0027] Finally, it should be noted that using spring steel for the spring 3 can make the elastic performance of the spring 3 not easily change.
[0028] The working principle of the present utility model is as follows: First, the nut plug 4 can be adjusted. Rotate the "one"-shaped groove 7 clockwise, driving the nut plug 4 to turn into the inner cavity of the valve body housing 1, thereby adjusting the compression of the spring 3 and increasing the elastic force. The pressure required for the liquid to enter will also be greater than the pressure used when the spring 3 is not compressed. And the present utility model involves two states of closing and opening, which are respectively:
[0029] Closed state: In the absence of an external force, the valve core 2 of the one-way valve will stay in the closed position, and the reaction force of the spring 3 prevents the liquid from flowing from the liquid inlet 5 to the liquid outlet 8. At this time, the one-way valve is in the closed state;
[0030] Open state: When the liquid flows in from the liquid inlet 5, the liquid pressure acts on the valve core 2, which is greater than the reaction force of the spring 3 in the closed state, pushing the valve core 2 to move to the open position. The liquid flows through the liquid inlet 5 to the flow channel hole 6 and then flows out of the liquid outlet 8 along the inner cavity of the valve body housing 1. When the liquid pressure decreases, due to the gap between the narrow upper part of the valve core 2 and the inner cavity of the valve body housing 1, the liquid in the gap can generate a certain buffer force on the valve core 2, and the spring 3 will gradually recover its elasticity and pull the valve core 2 back to the closed position.
[0031] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.
Claims
1. An adjustable pressure one-way valve for pipelines, comprising a valve body housing (1), characterized in that: The inner cavity side surface of the valve body housing (1) is provided with threads. The top end of the valve body housing (1) is provided with a liquid inlet (5). The top end of the inner cavity of the valve body housing (1) is provided with a valve core (2). The inner cavity of the valve core (2) is movably connected to a spring (3). The lower inner cavity of the valve body housing (1) is threadedly connected to a nut plug (4). The nut plug (4) can adjust the compression of the spring (3). A "one"-shaped groove (7) is provided at the central axis position of the bottom end surface of the nut plug (4). The center of the nut plug (4) communicates with a liquid outlet (8), and the liquid outlet (8) is arranged at the bottom of the valve body housing (1) in a flared shape.
2. The adjustable pressure one-way valve for pipeline according to claim 1, characterized in that: The valve core (2) is in the shape of a cylinder with a narrower upper part and a wider lower part. The narrower part of the valve core (2) is provided with a flow channel hole (6). The inner cavity of the wider lower part of the valve core (2) is a cavity for placing the spring (3).
3. The adjustable pressure one-way valve for pipelines according to claim 2, wherein: The head of the narrower upper part of the valve core (2) is conical. The middle position of the valve core (2) is rounded. The wider lower part of the valve core (2) is in sliding connection with the inner cavity of the valve body housing (1). The inner cavity of the narrower upper part of the valve core (2) communicates with the inner cavity of the wider lower part of the valve core (2).
4. The adjustable pressure one-way valve for pipeline according to claim 1, characterized in that: The flow channel in the inner cavity of the valve core (2) extends to the inside of the top end of the spring (3) and is close to the inner side of the top end of the spring (3).
5. The adjustable pressure one-way valve for pipeline according to claim 2, characterized in that: The spring (3) is made of spring steel. Four groups of flow channel holes (6) are provided.