Metal sealing zero-leakage one-way valve

Abstract

The utility model relates to the technical field of one-way valves, in particular to a metal sealing zero-leakage one-way valve which comprises a valve body, a valve seat is fixedly connected to the inner wall of the valve body, and a guide sleeve is connected to the inner wall of the valve body in a sliding mode. A guide through groove is formed in the top of the guide sleeve. A guide hole is formed in the side, close to the center of the valve body, of the guide sleeve. The inner wall of the guide hole is slidably connected with an arrow-shaped valve element. A mounting hole is formed in the end, close to the guide sleeve, of the arrow-shaped valve element. A cotter pin is fixedly mounted on the inner wall of the mounting hole. In the prior art, a ball valve type valve core is usually used, but the sealing performance of the ball valve type valve core becomes poor due to friction along with the increase of the use times; in part of the prior art, opening and closing of a valve element are controlled through reset traction of a spring, however, the spring may make contact with liquid during use, the mechanical performance of the spring may be damaged when the spring is soaked in the liquid for a long time, and the sealing performance of the spring is affected due to metal fatigue after the spring is used for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, in particular to a metal-sealed zero-leakage check valve. Background Technique

[0002] A check valve is a valve through which fluid can only flow along the inlet, and the medium at the outlet cannot flow back. It is commonly known as a check valve and is used in hydraulic systems to prevent the reverse flow of oil or in pneumatic systems to prevent the reverse flow of compressed air. When the check valve is installed at the outlet of a pump, it can prevent damage to the equipment caused by a sudden increase in system pressure and play a check valve role.

[0003] Considering that the valve cores of existing technologies usually use ball valves, but the ball valves will have poor sealing performance due to friction after increasing the number of uses; some existing technologies use spring reset traction to control the opening and closing of the valve core, but the spring may come into contact with the liquid during use, and the mechanical properties of the spring may be damaged when immersed in the liquid for a long time, and the spring will affect the sealing performance due to metal fatigue after long-term use. Content of the Utility Model

[0004] The purpose of the utility model is to provide a metal-sealed zero-leakage check valve to solve the problems raised in the above background technique.

[0005] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0006] The utility model is a metal-sealed zero-leakage check valve, including a valve body. A valve seat is fixedly connected to the inner wall of the valve body, and a guide sleeve is slidably connected to the inner wall of the valve body; a flow guiding groove is opened at the top of the guide sleeve, and a guiding hole is opened on one side of the guide sleeve close to the center of the valve body; an arrow-shaped valve core is slidably connected to the inner wall of the guiding hole; an installation hole is opened at one end of the arrow-shaped valve core close to the guide sleeve, and a split pin is fixedly installed on the inner wall of the installation hole.

[0007] Adopting the above technical solution, when the liquid enters, the guide sleeve will be pushed into the valve body due to the pressure of the liquid. At this time, the liquid will enter through the flow guiding barrel groove and extrude the arrow-shaped valve core through hydraulic pressure. When the arrow-shaped valve core is under pressure, it will be completely attached to the valve seat, thereby achieving the effect of preventing leakage. When it is necessary to discharge the liquid, the guide sleeve will move outwards. At this time, the guide sleeve will contact the split pin and pull the arrow-shaped valve core to move through the split pin. At this time, the internal liquid will be discharged due to the pressure difference. After the liquid is discharged and the internal pressure is balanced, the guide sleeve will be subjected to the liquid pressure again and move into the valve body, thereby achieving the effect of repeatedly discharging the liquid.

[0008] Furthermore, an outlet is arranged at one end of the valve body away from the guide sleeve, and an inlet is arranged at one end of the valve body close to the guide sleeve.

[0009] With the above technical solution, liquid can enter through the liquid inlet, and the effect of unidirectional flow can be achieved. Through the setting of the liquid outlet, after the internal liquid is discharged, it can reach the next component through the liquid outlet.

[0010] Furthermore, a limiting rod is fixedly connected to one side of the arrow-shaped valve core, a valve cap is fixedly installed on the inner wall of the valve body, a sliding hole is opened at the center of the valve cap, and the outer wall of the limiting rod is slidably connected to the inner wall of the sliding hole.

[0011] With the above technical solution, through the setting of the limiting rod and the valve cap, the arrow-shaped valve core will not deviate from its original position when moving, so as to prevent the deterioration of the sealing performance caused by the deviation of the arrow-shaped valve core.

[0012] Furthermore, a sealing hole is opened on the outer wall of the valve seat, and a circular sealing ring is fixedly connected to the inner wall of the sealing hole.

[0013] With the above technical solution, through the setting of the circular sealing ring, it can prevent the internal liquid from flowing out through the gap on the outer wall of the valve seat, ensuring the sealing performance and unidirectionality of the equipment.

[0014] Furthermore, one end of the valve seat close to the guide sleeve is fixedly connected to one end of a sealing gasket; the other end of the sealing gasket is fixedly connected to a gasket.

[0015] With the above technical solution, through the setting of the sealing gasket and the gasket, the gap between the valve seat and the valve body can be filled, thereby increasing the sealing performance. And the sealing gasket is flexible. When the arrow-shaped valve core fits with the valve seat, it will be squeezed and fill the gap to avoid liquid backflow or excessive liquid outflow, increasing the sealing performance and avoiding leakage.

[0016] Furthermore, the outer wall of one end of the valve body close to the guide sleeve is provided with threads; the inner wall of the liquid inlet is provided with threads.

[0017] With the above technical solution, through the setting of the threads, the external equipment can be installed, simplifying the installation method of the external equipment and increasing the simplicity.

[0018] The utility model has the following beneficial effects:

[0019] 1. When liquid enters, the guide sleeve will move inward into the valve body due to the pressure of the liquid. At this time, the liquid will enter through the guide barrel groove and hydraulically extrude the arrow-shaped valve core. When the arrow-shaped valve core is under pressure, it will fit perfectly with the valve seat, blocking the outflow of the liquid and achieving the effect of preventing leakage. When it is necessary to drain the liquid, the guide sleeve will move outward. At this time, the guide sleeve will contact the split pin and pull the arrow-shaped valve core to move through the split pin. At this time, the internal liquid will be discharged due to the pressure difference. After the liquid is discharged and the internal pressure is balanced, the guide sleeve will be subjected to the liquid pressure again and move inward into the valve body, thus achieving the effect of repeated liquid drainage.

[0020] 2. Through the settings of the sealing gasket and the spacer, the gap between the valve seat and the valve body can be filled, thereby increasing the sealing performance. Moreover, the sealing gasket is flexible. When the arrow-shaped valve core fits with the valve seat, it will be squeezed and fill the gap to prevent liquid backflow or the outflow of excess liquid, increasing the sealing performance and avoiding leakage.

[0021] Of course, it is not necessary for any product implementing the present utility model to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0023] Figure 1 It is a schematic diagram of the overall structure.

[0024] In the drawings, the list of components represented by each reference numeral is as follows:

[0025] In the figure: 1. Valve body; 2. Valve cap; 3. Arrow-shaped valve core; 4. Valve seat; 5. Circular sealing ring; 6. Sealing gasket; 7. Spacer; 8. Split pin; 9. Guide sleeve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some, rather than all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0027] Please refer to Figure 1As shown in the figure, the utility model is a metal-sealed zero-leakage one-way valve, which includes a valve body 1. A valve seat 4 is fixedly connected to the inner wall of the valve body 1, and a guide sleeve 9 is slidably connected to the inner wall of the valve body 1. A flow guiding groove is formed at the top of the guide sleeve 9, and a guiding hole is formed on one side of the guide sleeve 9 close to the center of the valve body 1. An arrow-shaped valve core 3 is slidably connected to the inner wall of the guiding hole. An installation hole is formed at one end of the arrow-shaped valve core 3 close to the guide sleeve 9, and a split pin 8 is fixedly installed on the inner wall of the installation hole.

[0028] In this embodiment, considering that the valve cores in the prior art usually use ball valves, but the ball valves will have poor sealing performance due to friction after increasing the number of uses; some prior arts will use spring reset traction to control the opening and closing of the valve core, but the spring may come into contact with the liquid during use. When immersed in the liquid for a long time, the mechanical properties of the spring may be damaged, and the spring will affect the sealing performance due to metal fatigue after long-term use.

[0029] When the liquid enters, the guide sleeve 9 will move towards the inside of the valve body 1 under the pressure of the liquid. At this time, the liquid will enter through the flow guiding barrel groove and squeeze the arrow-shaped valve core 3 through hydraulic pressure. When the arrow-shaped valve core 3 is under pressure, it will be completely attached to the valve seat 4, so as to achieve the effect of preventing leakage. When the liquid needs to be discharged, the guide sleeve 9 will move outwards. At this time, the guide sleeve 9 will contact the split pin 8 and pull the arrow-shaped valve core 3 to move through the split pin 8. At this time, the internal liquid will be discharged due to the pressure difference. After the liquid is discharged, the internal pressure is balanced, and the guide sleeve 9 will be affected by the liquid pressure again and move towards the inside of the valve body 1, so as to achieve the effect of repeatedly discharging the liquid.

[0030] Specifically, an outlet is provided at one end of the valve body 1 away from the guide sleeve 9, and an inlet is provided at one end of the valve body 1 close to the guide sleeve 9.

[0031] In this embodiment, the liquid can enter through the inlet and achieve the effect of one-way flow. Through the setting of the outlet, the internal liquid can reach the next component through the outlet after being discharged.

[0032] Specifically, a limiting rod is fixedly connected to one side of the arrow-shaped valve core 3, a valve cap 2 is fixedly installed on the inner wall of the valve body 1, a sliding hole is formed at the center of the valve cap 2, and the inner wall of the sliding hole is slidably connected to the outer wall of the limiting rod.

[0033] In this embodiment, through the setting of the limiting rod and the valve cap 2, the arrow-shaped valve core 3 will not deviate from its original position during movement, so as to prevent the sealing performance from deteriorating due to the deviation of the arrow-shaped valve core 3.

[0034] Specifically, a sealing hole is formed on the outer wall of the valve seat 4, and a circular sealing ring 5 is fixedly connected to the inner wall of the sealing hole.

[0035] In this embodiment, the circular sealing ring 5 is provided to prevent the internal liquid from flowing out through the gap on the outer wall of the valve seat 4, ensuring the sealing and unidirectionality of the device.

[0036] Specifically, one end of the valve seat 4 close to the guide sleeve 9 is fixedly connected to one end of the gasket 6; the other end of the gasket 6 is fixedly connected to the spacer 7.

[0037] In this embodiment, the gasket 6 and the spacer 7 are provided to fill the gap between the valve seat 4 and the valve body 1, thereby increasing the sealing performance. Moreover, the gasket 6 is flexible. When the arrow-shaped valve core 3 fits with the valve seat 4, it will be squeezed and fill the gap to prevent liquid backflow or the outflow of excess liquid, increasing the sealing performance and avoiding leakage.

[0038] Specifically, the outer wall of one end of the valve body 1 close to the guide sleeve 9 is provided with threads; the inner wall of the liquid inlet is provided with threads.

[0039] In this embodiment, the threads are provided to install external devices, simplifying the installation method of external devices and increasing the simplicity.

[0040] During use, when the liquid enters, the guide sleeve 9 will be pushed by the liquid pressure to move into the valve body 1. At this time, the liquid will enter through the diversion barrel groove and squeeze the arrow-shaped valve core 3 hydraulically. When the arrow-shaped valve core 3 is under pressure, it will fit completely with the valve seat 4. When the arrow-shaped valve core 3 fits with the valve seat 4, it will be squeezed and fill the gap to prevent liquid backflow or the outflow of excess liquid, increasing the sealing performance and thus achieving the effect of preventing leakage. When it is necessary to discharge the liquid, the guide sleeve 9 will move outward. At this time, the guide sleeve 9 will contact the split pin 8 and pull the arrow-shaped valve core 3 to move through the split pin 8. At this time, the internal liquid will be discharged due to the pressure difference. After the liquid is discharged, the internal pressure is balanced, and the guide sleeve 9 will be affected by the liquid pressure again and move into the valve body 1, thus achieving the effect of repeated liquid discharge.

[0041] The above-disclosed preferred embodiments of the present invention are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the relevant technical field can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A metal-sealed zero-leakage one-way valve, comprising a valve body (1), characterized in that: The inner wall of the valve body (1) is fixedly connected to a valve seat (4), and the inner wall of the valve body (1) is slidably connected to a guide sleeve (9); a flow guide groove is provided at the top of the guide sleeve (9), and a guide hole is provided on a side of the guide sleeve (9) close to the center of the valve body (1); an arrow-shaped valve core (3) is slidably connected to the inner wall of the guide hole; an installation hole is provided at one end of the arrow-shaped valve core (3) close to the guide sleeve (9), and a cotter pin (8) is fixedly installed on the inner wall of the installation hole.

2. A metal-sealed zero-leakage one-way valve according to claim 1, characterized in that: An end of the valve body (1) away from the guide sleeve (9) is provided with a liquid inlet, and an end of the valve body (1) close to the guide sleeve (9) is provided with a liquid outlet.

3. A metal-sealed zero-leakage one-way valve according to claim 1, characterized in that: One side of the arrow-shaped valve core (3) is fixedly connected to a limit rod, and the inner wall of the valve body (1) is fixedly mounted with a valve cap (2). A sliding hole is provided at the center of the valve cap (2), and the inner wall of the sliding hole is slidably connected to the outer wall of the limit rod.

4. A metal-sealed zero-leakage one-way valve according to claim 1, characterized in that: The outer wall of the valve seat (4) is provided with a sealing hole, and the inner wall of the sealing hole is fixedly connected with a circular sealing ring (5).

5. The metal-sealed zero-leakage one-way valve according to claim 1, characterized in that: One end of the valve seat (4) close to the guide sleeve (9) is fixedly connected to one end of a sealing gasket (6); the other end of the sealing gasket (6) is fixedly connected to a gasket (7).

6. A metal-sealed zero-leakage one-way valve according to claim 2, characterized in that: The outer wall of one end of the valve body (1) close to the guide sleeve (9) is provided with a thread; and the inner wall of the liquid inlet is provided with a thread.

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