Damping check valve

Abstract

The utility model discloses a damping check valve which is characterized by consisting of a valve body, a valve plate, a return spring, a valve seat, a damping sheet and a guide mechanism, the valve body is barrel-shaped, and a valve body sealing table top is formed at the upper necking position; the valve plate is arranged in the valve body; a valve plate sealing surface is arranged at the upper part of the valve plate; a valve seat is connected to the lower portion in the valve body and connected with the valve plate through a guide mechanism. A return spring is arranged on the guide mechanism, and the valve plate moves upwards under the action of the return spring, so that the sealing surface of the valve plate and the sealing table surface of the valve body are sealed; at least one of the valve plate, the valve seat and the guide mechanism is provided with a damping sheet, and the periphery of the guide mechanism on the valve seat is provided with a first channel port for fluid to pass through; due to the fact that the damping cavity mechanism and the damping piece are arranged between the valve plate and the valve seat, when fluid flows through, the damping and damping effects are achieved, vibration of parts between the valve plate and the valve seat is reduced, noise and abrasion are reduced, and meanwhile the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to check valve technical field, concretely is a kind of shock-absorbing check valve, it is especially suitable for gaseous medium shock-absorbing. BACKGROUND

[0002] The check valve of existing air conditioner, because there is no damping mechanism, lead to valve when fluid medium (mainly gaseous medium) flow, because gas can be compressed, it is easy to produce vibration, vibration produces noise pollution, simultaneously produces abrasion and metal fatigue, finally reduces the life of valve, damages valve. UTILITY MODEL CONTENTS

[0003] The utility model aims at overcoming the problems of above-mentioned prior art, provide a kind of shock-absorbing check valve.

[0004] The technical scheme provided by the utility model is: a kind of shock-absorbing check valve, it is special in that, by valve body, valve plate, homing spring, valve seat, shock-absorbing sheet and guiding mechanism are formed;

[0005] The valve body is barrel shape, the upper portion is contracted, and the contracted position of the valve body forms a valve body sealing surface;The valve plate is built-in inside the valve body, and the cross-sectional area of the valve plate is 40%-70% of the cross-sectional area of the inner hole of the valve body;The upper portion of the valve plate is provided with a valve plate sealing surface;

[0006] The lower part of the valve body is connected with the valve seat, and the valve seat is connected with the valve plate through the guiding mechanism, and the valve plate moves up and down along with the guiding mechanism;The guiding mechanism is provided with a homing spring, one end of the homing spring is connected to the valve plate, and the other end is connected to the valve seat, the elastic force of the homing spring moves the valve plate upward, so that the valve plate sealing surface is sealed with the valve body sealing surface;At least one of the valve plate, the valve seat and the guiding mechanism is provided with a shock-absorbing sheet, and the shock-absorbing sheet is one piece or multiple pieces stacked;

[0007] The periphery of the guiding mechanism on the valve seat is provided with a first passage opening.

[0008] Further, the guiding mechanism is composed of a damping cylinder outer sleeve and a damping cylinder inner sleeve;The lower portion of the valve plate is provided with a damping cylinder outer sleeve, and the damping cylinder outer sleeve forms a blind hole structure with the valve plate;The middle position of the valve seat is provided with a damping cylinder inner sleeve, and the damping cylinder inner sleeve forms a blind hole structure with the valve seat;The damping cylinder outer sleeve is sleeved with the damping cylinder inner sleeve, and a damping cavity is formed in the middle, and there is a movable leakage gap between the two, and the valve plate moves up and down along with the damping cylinder sleeve;

[0009] The valve plate is provided with a shock-absorbing sheet, and the shock-absorbing sheet is inside the damping cylinder outer sleeve, and the shock-absorbing sheet and the upper portion of the damping cylinder inner sleeve cooperate to produce damping and damping effect.

[0010] Further, the second passage opening is provided on the middle position of the valve seat.

[0011] Furthermore, the guiding mechanism consists of a guide post and a second channel opening, with the guide post located at the lower part of the valve plate; the guide post is T-shaped or of any shape; the lower end of the guide post extends from the second channel opening on the valve seat; and the valve seat is provided with a shock-absorbing plate.

[0012] Furthermore, the guiding mechanism consists of a shock-absorbing cylinder outer sleeve, a shock-absorbing cylinder inner sleeve, a guide post, and a second channel opening; the lower part of the valve plate is provided with a shock-absorbing cylinder outer sleeve and a guide post, and the middle position of the valve seat is provided with a shock-absorbing cylinder inner sleeve and a second channel opening, the second channel opening being located inside the shock-absorbing cylinder inner sleeve; the guide post is located within the shock-absorbing cavity formed after the shock-absorbing cylinder outer sleeve and the shock-absorbing cylinder inner sleeve are fitted together; the lower end of the guide post extends out from the second channel opening on the valve seat.

[0013] Furthermore, a sealing gasket is provided at the upper valve plate sealing surface of the valve plate.

[0014] Furthermore, the valve plate sealing surface is a spherical surface, which seals when in contact with the valve body sealing surface.

[0015] The beneficial effects of this utility model are as follows: a damping cavity mechanism and damping pads are provided between the valve plate and the valve seat, so that when the fluid flows through, it plays a role in damping and shock absorption, reducing the vibration of the components between the valve plate and the valve seat, thereby reducing noise and wear, and extending the service life. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is another structural schematic diagram of the present invention;

[0018] Figure 3 This is another structural schematic diagram of this utility model.

[0019] In the diagram: 1 Valve body, 2 Valve plate, 3 Return spring, 4 Shock absorber cylinder outer sleeve, 5 Shock absorber cylinder inner sleeve, 6 Valve seat, 7 Snap ring, 8 Shock absorber plate, 9 First channel port, 10 Second channel port, 13 Shock absorber cavity, 14 Guide post, 15 Sealing gasket. Detailed Implementation

[0020] To better understand and implement this invention, the following detailed description is provided with reference to the accompanying drawings.

[0021] Example 1, as Figure 1 As shown, a shock-absorbing check valve consists of a valve body 1, a valve plate 2, a return spring 3, a valve seat 6, a shock-absorbing plate 8, and a guide mechanism.

[0022] The valve body 1 is barrel-shaped, the upper portion is tapered, and the tapered position of the valve body 1 forms a valve body sealing platform; the valve plate 2 is built in the upper portion of the valve body 1, the cross-sectional area of the valve plate 2 is smaller than the cross-sectional area of the inner hole of the valve body 1, and the cross-sectional area of the valve plate 2 is 40%-70% of the cross-sectional area of the inner hole of the valve body 1; the above area difference can make the fluid have enough flow area when passing through the peripheral ring belt of the valve plate 2, avoid excessive diameter reduction, and also can not cause material waste; the sealing gasket 15 is installed on the upper portion of the valve plate 2, the sealing gasket 15 is in any form such as press connection or sleeving; the sealing gasket 15 is processed into a spherical surface to form a valve plate sealing surface, which is in contact with the valve body sealing platform to seal; the valve seat 6 is installed in the lower portion of the valve body 1 and is clamped on the inner wall of the valve body 1 by the clamping spring 7; the guide mechanism is installed between the valve plate 2 and the valve seat 6, and the valve plate 2 moves up and down along with the guide mechanism;

[0023] The guide mechanism is composed of the damping cylinder outer sleeve 4 and the damping cylinder inner sleeve 5; the damping cylinder outer sleeve 4 is installed on the lower portion of the valve plate 2, and the damping cylinder outer sleeve 4 and the valve plate 2 form a blind hole structure; the damping cylinder inner sleeve 5 is installed at the middle position of the valve seat 6, and the damping cylinder inner sleeve 5 and the valve seat 6 form a blind hole structure; the first passage port 9 is formed around the damping cylinder inner sleeve 5 of the valve seat 6, and the first passage port 9 can make the fluid pass through; the first passage port is one or several, and the sum of the cross-sectional areas of the first passage port and the valve plate 2 is not more than ±35%; the damping cylinder outer sleeve 4 and the damping cylinder inner sleeve 5 are sleeved, a damping cavity 13 is formed in the middle, and there is a movable leakage gap between the damping cylinder outer sleeve 4 and the damping cylinder inner sleeve 5, and the valve plate 2 can move up and down along with the damping cylinder sleeve; the homing spring 3 is installed in the damping cavity 13, one end of the homing spring 3 is connected to the valve plate 2, and the other end of the homing spring 3 is connected to the valve seat 6; the homing spring 3 pushes the valve plate 2 to move upwards, so that the valve plate sealing surface is sealed with the valve body sealing platform; the damping sheet 8 is installed on the valve plate 2; the damping sheet 8 is one or more pieces of alternating superposition, and is made of elastic material or material with damping and damping effect; the damping sheet 8 cooperates with the upper portion of the damping cylinder inner sleeve 5 to produce damping and damping effect.

[0024] In addition, the second passage port 10 can be formed at the middle position of the valve seat 6, the second passage port 10 is located in the damping cylinder inner sleeve 5, and the second passage port 10 connects the inside and outside of the damping cavity 13.

[0025] The damping check valve of the above embodiment 1 has the following working principle: when the fluid flows from top to bottom, the valve plate is subjected to downward pressure, the valve plate compresses the homing spring in the damping cavity and the fluid medium in the damping cavity at the same time, the fluid medium leaks through the gap between the inner and outer sleeves of the damping cavity, the valve plate moves downward, the fluid flows through the ring belt space formed between the valve plate periphery and the inner wall of the valve body, and then flows out through the first passage port of the valve seat;

[0026] Because the damping cavity is a relatively closed space, the compressed internal fluid medium is discharged from the damping cavity, and generates compression resistance, which needs to consume time, or the fluid medium flows into the damping cavity, which also needs to consume time, so as to make the valve plate generate damping effect, and play a shock resistance role;

[0027] When the fluid flows through the valve plate, and the pressure of the fluid on the valve plate is large to a certain extent, the valve plate opening reaches the maximum, the upper part of the lower sleeve of the damping cavity is in contact with the damping sheet, and the damping sheet has a buffering or damping effect, so as to reduce the vibration of the valve plate, reduce the vibration abnormal sound and wear and metal fatigue of the valve plate; The number of damping sheets can be one or more, and the multiple forms can be directly stacked or stacked through intermediate spacing, and the damping generated is a progressive stacking effect.

[0028] Because the homing spring is arranged in the damping cavity, the homing spring will not be vibrated and abnormal sound by the fluid impact;

[0029] When there is reverse fluid flow or no fluid flow, the valve plate is moved upward under the action of the homing spring and the force of the reverse fluid acting on the valve plate from bottom to top, the valve plate sealing surface is pressed and sealed with the valve body sealing platform, so as to close the valve and prevent the reverse flow of the fluid.

[0030] Embodiment 2, as shown in Figure 2 The difference between the embodiment 1 and the embodiment 2 is that the guide mechanism is composed of a guide column 14 and a second channel opening 10; the guide column 14 is arranged at the lower part of the valve plate 2, and the second channel opening 10 is arranged at the middle position of the valve seat 6; the guide column 14 is T-shaped or any shape, and the lower end of the guide column 14 extends from the second channel opening 10 on the valve seat 6 to play a guiding role; the homing spring 3 is arranged outside the guide column 14; and the damping sheet 8 is arranged on the valve seat 6.

[0031] Embodiment 3, as shown in Figure 3 The difference between the embodiment 1 and the embodiment 2 is that the guide mechanism is composed of a damping cylinder outer sleeve 4, a damping cylinder inner sleeve 5, a guide column 14 and a second channel opening 10; the damping cylinder outer sleeve 4 and the guide column 14 are arranged at the lower part of the valve plate 2, the damping cylinder inner sleeve 5 and the second channel opening 10 are arranged at the middle position of the valve seat 6, and the second channel opening 10 is located in the damping cylinder inner sleeve 5; the guide column 14 is located in the damping cavity 13 formed after the damping cylinder outer sleeve 4 and the damping cylinder inner sleeve 5 are sleeved; the lower end of the guide column 14 extends from the second channel opening 10 on the valve seat 6 to play a guiding role; and the damping sheet 8 is arranged on the valve plate 2 and corresponds to the inside of the damping cylinder inner sleeve 5.

[0032] Embodiment 4, the difference between the embodiment 1 and the embodiment 4 is that the damping cylinder outer sleeve 4 is arranged on the valve seat 6, the damping cylinder inner sleeve 5 is arranged on the valve plate 2, and the damping sheet 8 is arranged on the valve seat 6.

[0033] It should be understood that the technical features not elaborated in the specification are all prior art. Although the embodiments of the utility model patent are described above in combination with the drawings, the utility model is not limited to the above specific embodiments, and the above specific embodiments are only illustrative and not restrictive. Those skilled in the art can make more forms under the inspiration of the utility model without departing from the purpose of the utility model and the scope protected by the claims, which are all within the protection scope of the utility model.

Claims

1. A shock absorbing check valve characterized by, It is composed of valve body (1), valve plate (2), homing spring (3), valve seat (6), shock absorber (8) and guide mechanism; The valve body (1) is barrel-shaped, the upper portion is constricted, and the constricted position of the valve body (1) forms a valve body sealing platform; the valve plate (2) is built-in inside the valve body (1), and the cross-sectional area of the valve plate (2) is 40%-70% of the cross-sectional area of the inner hole of the valve body (1); the upper portion of the valve plate (2) is provided with a valve plate sealing surface; The lower portion of the valve body (1) is connected with the valve seat (6), the valve seat (6) is connected with the valve plate (2) through the guide mechanism, and the valve plate (2) moves up and down along with the guide mechanism; the upper portion of the guide mechanism is provided with the homing spring (3), one end of the homing spring (3) is connected with the valve plate (2), the other end is connected with the valve seat (6), the elastic force of the homing spring (3) makes the valve plate (2) move upward, so that the valve plate sealing surface is sealed with the valve body sealing platform; at least one of the valve plate (2), the valve seat (6) and the guide mechanism is provided with the shock absorber (8), and the shock absorber (8) is one piece or multiple pieces stacked; The periphery of the guide mechanism on the valve seat (6) is provided with a first channel opening (9).

2. A shock absorber check valve according to claim 1, wherein The guide mechanism is composed of a shock absorber outer sleeve (4) and a shock absorber inner sleeve (5); the lower portion of the valve plate (2) is provided with the shock absorber outer sleeve (4), and the shock absorber outer sleeve (4) and the valve plate (2) form a blind hole structure; the middle position of the valve seat (6) is provided with the shock absorber inner sleeve (5), and the shock absorber inner sleeve (5) and the valve seat (6) form a blind hole structure; the shock absorber outer sleeve (4) and the shock absorber inner sleeve (5) are sleeved, a shock absorbing cavity (13) is formed in the middle, and there is a movable leakage gap between the two, and the valve plate (2) moves up and down along with the shock absorber sleeve; The valve plate (2) is provided with the shock absorber (8) inside the shock absorber outer sleeve (4), and the shock absorber (8) cooperates with the upper portion of the shock absorber inner sleeve (5) to produce a shock absorbing and damping effect.

3. A shock absorber check valve according to claim 1, wherein The middle position of the valve seat (6) is provided with a second channel opening (10).

4. A shock absorber check valve according to claim 1 or 3, wherein The guide mechanism is composed of a guide column (14) and a second channel opening (10), and the lower portion of the valve plate (2) is provided with the guide column (14); the guide column (14) is T-shaped or any shape; the lower end of the guide column (14) extends out of the second channel opening (10) on the valve seat (6); the valve seat (6) is provided with the shock absorber (8).

5. A shock absorber check valve according to claim 2 or 3, wherein The guide mechanism is composed of a shock absorber outer sleeve (4), a shock absorber inner sleeve (5), a guide column (14) and a second channel opening (10); the lower portion of the valve plate (2) is provided with the shock absorber outer sleeve (4) and the guide column (14), the middle position of the valve seat (6) is provided with the shock absorber inner sleeve (5) and the second channel opening (10), and the second channel opening (10) is located in the shock absorber inner sleeve (5); the guide column (14) is located in the shock absorbing cavity (13) formed after the shock absorber outer sleeve (4) and the shock absorber inner sleeve (5) are sleeved; the lower end of the guide column (14) extends out of the second channel opening (10) on the valve seat (6).

6. A shock absorber check valve according to claim 1 wherein, The upper valve plate sealing surface of the valve plate (2) is provided with a sealing gasket (15).

7. A shock absorber check valve according to claim 1 wherein, The valve plate sealing surface is a spherical surface, which is sealed when in contact with the valve body sealing platform.

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