A new type of gravity air damping structure check valve

Abstract

The invention discloses a novel gravity-type air damping structure one-way valve, comprising a valve body, an end cover, and a valve core. Compared with the prior art, the invention gradually slows down the maximum speed of the valve core during operation and shortens the valve core operation stroke through two-stage air compression processes, and at the same time, controls the air compression amount to avoid direct contact between the valve core and the end cover, thereby extending the service life of the one-way valve.

Description

Technical Field

[0001] The invention relates to the technical field of gravity type one-way valves, in particular to a novel gravity type one-way valve with an air damping structure. Background Art

[0002] In the field of air brakes, many one-way valve manufacturers currently use gravity one-way valve structures. However, this approach brings the following problems:

[0003] 1. In the actual air brake pipeline, when the one-way valve is in working state, the compressed air in the equipment behind the outlet is consumed violently, which can easily cause the valve core to be pushed toward the end cover by the compressed air at the inlet, and the valve core will hit the vent at high speed in the reverse direction, causing multiple reciprocating impacts in the axial direction;

[0004] 2. The valve core reciprocates up and down in the valve body, which can easily cause wear of the contact parts over a long period of time, loosening of the valve core, collision and vibration in the radial direction, greatly shortening the product life cycle. Summary of the invention

[0005] The purpose of the present invention is to provide a novel gravity-type one-way valve with air damping structure, which is used to avoid the problem of vibration or valve core damage caused by the valve core hitting the end cover.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The invention discloses a novel gravity-type air damping structure one-way valve, comprising:

[0008] A valve body, wherein the valve body has an air inlet cavity, an air outlet cavity and a guide cavity, wherein the air inlet cavity and the air outlet cavity are connected through an air vent, wherein the guide cavity comprises an upper guide area and a lower guide area, wherein the diameter of the upper guide area is greater than the diameter of the lower guide area, wherein the upper portion of the lower guide area is provided with a first groove along the axial direction, wherein the upper end of the first groove is connected with the upper guide area;

[0009] An end cover, the end cover is sealed and fixed to the top of the guide cavity;

[0010] A valve core, the valve core includes a valve core body and a sealing gasket, the sealing gasket is fixed to the bottom of the valve core body, and when the valve core falls in the guide cavity, the sealing gasket can cover the vent; a blind hole is provided on the top of the valve core body, and an upper guide ring and a lower guide ring are provided on the side of the valve core body, the upper guide ring is used for sliding contact with the upper guide area, and the lower guide ring is used for sliding contact with the lower guide area, a full-circle groove and a second groove are provided on the outer side surface of the lower guide ring, the second groove is located above the full-circle groove and is not connected, the upper end of the second groove extends to the upper surface of the lower guide ring, the bottom of the full-circle groove is provided with a through hole, and the full-circle groove is connected with the blind hole through the through hole.

[0011] Preferably, a sealing ring is provided between the end cover and the valve body, and a mounting groove for accommodating the sealing ring is provided on the lower surface of the end cover.

[0012] Preferably, the sealing ring is made of rubber.

[0013] Preferably, the bottom of the blind hole is a conical surface.

[0014] Preferably, one end of the through hole is located on the conical surface.

[0015] Preferably, the through hole is arranged along the radial direction of the valve core body.

[0016] Preferably, the sealing gasket is made of rubber.

[0017] Preferably, the overall structure of the valve body is an inverted T-shape, the air inlet cavity is arranged at one end of the bottom of the valve body, the air outlet cavity is arranged at the other end of the bottom of the valve body, and the vent is coaxial with the guide cavity.

[0018] Compared with the prior art, the present invention has achieved the following technical effects:

[0019] The invention gradually reduces the maximum speed of the valve core during operation and shortens the valve core operation stroke through two-stage air compression processes, and simultaneously avoids direct contact between the valve core and the end cover by controlling the air compression amount, thereby extending the service life of the one-way valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a structural schematic diagram of a novel gravity-type air damping structure one-way valve of this embodiment;

[0022] Figure 2 It is a structural schematic diagram of the valve core;

[0023] Figure 3 It is a structural schematic diagram of the valve body;

[0024] Figure 4 It is another structural schematic diagram of the valve core;

[0025] Figure 5 is a schematic diagram of a first air chamber and a second air chamber;

[0026] Explanation of the reference numerals: 1-valve body; 2-valve core; 3-end cover; 4-sealing ring; 5-first air chamber; 6-second air chamber; 11-air inlet cavity; 12-air outlet cavity; 13-guide cavity; 14-vent; 21-valve core body; 22-sealing gasket; 131-upper guide area; 132-lower guide area; 211-blind hole; 212-upper guide ring; 213-lower guide ring; 214-through hole; 1321-first groove; 2131-full circle groove; 2132-second groove. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] The purpose of the present invention is to provide a novel gravity-type one-way valve with air damping structure, which is used to avoid the problem of vibration or valve core damage caused by the valve core hitting the end cover.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] like Figure 1-5 As shown, this embodiment provides a novel gravity-type air damping structure one-way valve, including a valve body 1, an end cover 3 and a valve core 2.

[0031] The valve body 1 has an air inlet cavity 11, an air outlet cavity 12 and a guide cavity 13, and the air inlet cavity 11 and the air outlet cavity 12 are connected through a vent 14. In this embodiment, the overall structure of the valve body 1 is an inverted T-shape, the air inlet cavity 11 is arranged at one end of the bottom of the valve body 1, the air outlet cavity 12 is arranged at the other end of the bottom of the valve body 1, and the vent 14 is coaxial with the guide cavity 13. The guide cavity 13 includes an upper guide area 131 and a lower guide area 132, and the diameter of the upper guide area 131 is larger than the diameter of the lower guide area 132. The upper part of the lower guide area 132 is axially provided with a first groove 1321, and the upper end of the first groove 1321 is connected with the upper guide area 131. The end cover 3 is sealed and fixed to the top of the guide cavity 13. The valve core 2 includes a valve core body 21 and a sealing gasket 22, and the sealing gasket 22 is fixed to the bottom of the valve core body 21. When the valve core 2 falls in the guide cavity 13, the sealing gasket 22 can cover the vent 14. A blind hole 211 is provided at the top of the valve core body 21, and an upper guide ring 212 and a lower guide ring 213 are provided on the side of the valve core body 21. The upper guide ring 212 is used for sliding contact with the upper guide area 131, and the lower guide ring 213 is used for sliding contact with the lower guide area 132. A full-circle groove 2131 and a second groove 2132 are provided on the outer surface of the lower guide ring 213. The second groove 2132 is located above the full-circle groove 2131 and the two are not connected to each other. The upper end of the second groove 2132 extends to the upper surface of the lower guide ring 213. A through hole 214 is provided at the bottom of the full-circle groove 2131, and the full-circle groove 2131 is connected to the blind hole 211 through the through hole 214. The upper space of the valve core 2 is the first air chamber 5, and the space between the valve core 2 and the inner wall of the guide cavity 13 is the second air chamber 6.

[0032] When the one-way valve is at rest in normal state, the valve core 2 is located at the bottom of the guide cavity 13, and the sealing gasket 22 at the bottom of the valve core 2 is in contact with the vent 14, isolating the air inlet cavity 11 and the air outlet cavity 12. At this time, the second air chamber 6 is connected to the air outlet cavity 12 through the second groove 2132, and the first air chamber 5 is connected to the air outlet cavity 12 through the through hole 214. The upward movement of the valve core 2 is divided into three stages; in the first stage, the air inlet pressure increases to a certain value, pushing the valve core 2 to move upward, the first air chamber 5 is exhausted through the through hole 214, and the air inlet chamber 11 and the air outlet chamber 12 are connected; in the second stage, the valve core 2 moves upward, the entire circle of grooves 2131 contacts and closes with the lower part of the lower guide area 132 of the valve body 1, and begins to compress the air in the first air chamber 5, and the air inlet chamber 11 and the air outlet chamber 12 are continuously connected; in the third stage, the valve core 2 moves upward, the entire circle of grooves 2131 is connected with the first groove 1321, the first air chamber 5 and the second air chamber 6 are connected, and the compressed gas flows from the first air chamber 5 to the second air chamber 6, synchronously compressing the air in the first air chamber 5 and the second air chamber 6, until the sum of the air pressure in the first air chamber 5, the air pressure in the second air chamber 6 and the weight of the valve core 2 itself is equal to the difference between the air inlet pressure and the air outlet pressure.

[0033] In order to improve the sealing performance of the end cover 3, a sealing ring 4 is provided between the end cover 3 and the valve body 1 in this embodiment, and a mounting groove for accommodating the sealing ring 4 is provided on the lower surface of the end cover 3. The sealing ring 4 and the sealing gasket 22 are preferably made of rubber.

[0034] In order to facilitate the discharge of the gas in the first air chamber 5 , the bottom of the blind hole 211 in this embodiment is a conical surface, the through hole 214 is arranged along the radial direction of the valve core body 21 , and one end of the through hole 214 is located on the conical surface.

[0035] The present specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A gravity type air damping structure one-way valve, characterized in that: include: A valve body, wherein the valve body has an air inlet cavity, an air outlet cavity and a guide cavity, wherein the air inlet cavity and the air outlet cavity are connected through an air vent, wherein the guide cavity comprises an upper guide area and a lower guide area, wherein the diameter of the upper guide area is greater than the diameter of the lower guide area, wherein the upper portion of the lower guide area is provided with a first groove along the axial direction, wherein the upper end of the first groove is connected with the upper guide area; An end cover, the end cover is sealed and fixed to the top of the guide cavity; A valve core, the valve core comprises a valve core body and a sealing gasket, the sealing gasket is fixed to the bottom of the valve core body, and when the valve core falls in the guide cavity, the sealing gasket can cover the vent; a blind hole is provided on the top of the valve core body, and an upper guide ring and a lower guide ring are provided on the side of the valve core body, the upper guide ring is used for sliding contact with the upper guide area, and the lower guide ring is used for sliding contact with the lower guide area, and a full-circle groove and a second groove are provided on the outer side surface of the lower guide ring, the second groove is located above the full-circle groove and is not connected, and the upper end of the second groove extends to the upper surface of the lower guide ring, and a through hole is provided at the bottom of the full-circle groove, and the full-circle groove is connected with the blind hole through the through hole; A sealing ring is arranged between the end cover and the valve body, and a mounting groove for accommodating the sealing ring is arranged on the lower surface of the end cover; the bottom of the blind hole is a conical surface.

2. The gravity-type air damping structure one-way valve according to claim 1, characterized in that: The sealing ring is made of rubber.

3. The gravity-type air damping structure one-way valve according to claim 1, characterized in that: One end of the through hole is located on the conical surface.

4. The gravity-type air damping structure one-way valve according to claim 1, characterized in that: The through hole is arranged along the radial direction of the valve core body.

5. The gravity-type air damping structure one-way valve according to claim 1, characterized in that: The sealing pad is made of rubber.

6. The gravity-type air damping structure one-way valve according to claim 1, characterized in that: The overall structure of the valve body is an inverted T-shape, the air inlet cavity is arranged at one end of the bottom of the valve body, the air outlet cavity is arranged at the other end of the bottom of the valve body, and the air vent is coaxial with the guide cavity.

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