Self-cleaning silencing check valve

Abstract

The utility model relates to the technical field of check valves, in particular to a self-cleaning silencing check valve which structurally comprises a valve body, an inner cavity is formed in the valve body, a water inlet is formed in the bottom of the inner cavity, a water outlet is formed in the top of the inner cavity, a valve clack is arranged at the position of the water inlet, a valve rod is arranged at the top of the valve clack, and a guide support is arranged at the position of the water outlet. A guide support is arranged between the valve rod and the valve clack, a shaft sleeve is arranged in the middle of the guide support, an elastic piece pushing the valve clack to abut against the water inlet in a sealing mode is arranged between the guide support and the valve clack, and a linear bearing is fixed in the shaft sleeve. Therefore, when entering the gap between the linear bearing and the valve rod, particles such as sludge and sand in the fluid are collected in the drainage groove, move in the moving direction of the fluid and are finally discharged outwards through the opening in the shaft sleeve, so that the situation that the valve rod is stuck due to the particles such as the sludge and the sand in the fluid is avoided, and the service life of the valve rod is prolonged. And normal work of the check valve is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to check valve technical field, especially a self -cleaning type sound -absorbing check valve. BACKGROUND

[0002] Check valve is the closing piece for circular valve clapper and acts by its own weight and medium pressure to block the medium backflow, belongs to automatic valve class, also called check valve, one -way valve, backflow valve or isolation valve, it is divided into sound -absorbing mute type, rubber clapper type and double -clapper type these several in function.

[0003] In patent number: CN204459310U in patent file discloses a new sound -absorbing check valve, including the valve body, the flange plate is equipped on the both ends of valve body, the valve cover is installed on the upper end of valve body, the guide hole is opened in the valve cover, the valve core shaft is slidably fitted in the guide hole, the valve core rubber pad is installed on the lower end of valve core shaft, the valve core rubber pad is placed in the water inlet port of valve body, and the spring is arranged between the rear end of valve core rubber pad and valve cover.

[0004] Its still has following insufficient in the process of practical application: the valve rod and the valve cover of current check valve are directly connected, when the fluid entering the check valve contains sludge and sand, the sludge, sand and other particulate matter easily enter the gap between the valve rod and the valve cover guide hole, thereby causing the valve rod to be stuck, influence check valve normal operation. UTILITY MODEL CONTENTS

[0005] The utility model provides a self -cleaning type sound -absorbing check valve can effectively solve above -mentioned problem.

[0006] The utility model is realized as follows:

[0007] A self -cleaning type sound -absorbing check valve, its structure includes: valve body, the inner chamber is opened in the valve body, the inner chamber bottom is water inlet, and the inner chamber top is water outlet, the valve clapper is equipped at water inlet, the valve rod is equipped at the top of valve clapper, the guide support is equipped at water outlet, the shaft sleeve is equipped in the middle of guide support, the elastic piece that pushes the valve clapper seal and touches at water inlet is equipped between guide support and valve clapper, the linear bearing is fixed in the shaft sleeve, the linear bearing and shaft sleeve adopt interference fit, the guide hole that slides with valve rod is opened in the linear bearing, a plurality of drainage grooves that extend along the axial direction of valve rod are arranged in the guide hole in annular array, and the drainage groove penetrates the upper and lower ends of linear bearing, the opening that is used for the communication of drainage groove and water outlet is equipped at the top of shaft sleeve.

[0008] As further improvement, the guide support is locked and connected with the valve body through the inner hexagonal flat end locking screw.

[0009] As further improvement, the elastic piece is spiral spring, and the bottom surface of guide support and the top surface of valve clapper are respectively abutted at the upper and lower ends.

[0010] The utility model discloses the beneficial effect is:

[0011] The utility model discloses a linear bearing is established between valve stem and axle sleeve, therefore, when the granule such as sludge, sand in fluid enters the gap between linear bearing and valve stem, gathers to the drain groove, simultaneously, the granule moves along with the fluid movement direction, finally, the granule is discharged outward through the opening on axle sleeve, thereby, the situation that the sludge, sand and the like in fluid cause valve stem to be stuck is avoided, and the normal work of check valve is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to make the technical scheme of the embodiments of the utility model clearer, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained from the drawings without creative labor.

[0013] Fig. 1 It is the sectional view structural schematic drawing of the self-cleaning type muffler check valve provided by the utility model,

[0014] Fig. 2 It is the three-dimensional structure schematic drawing of linear bearing provided by the utility model,

[0015] Fig. 3 It is the structure schematic drawing of linear bearing from the top provided by the utility model.

[0016] In the drawing: valve body-1, valve clapper-2, valve stem-3, guiding support-4, axle sleeve-5, elastic member-6, linear bearing-7, guiding hole-71, drain groove-72, inner hexagonal flat end lock screw-8. DETAILED DESCRIPTION

[0017] In order to make the technical scheme of the embodiments of the utility model clearer, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained from the drawings without creative labor.

[0018] In the description of the utility model, the terms "first", "second" are only used for the purpose of description, and cannot be understood as the purpose of indicating the mode, technical scheme and advantages, and the technical scheme in the utility model embodiment will be clearly and completely described below in combination with the drawings in the utility model embodiment, obviously, the described embodiment is a part of the embodiment of the utility model, rather than all the embodiments. Based on the embodiment in the utility model, all other embodiments or implied relative importance or implicitly indicate the number of indicated technical features obtained by ordinary skilled in the art without creative labor. Therefore, the features with "first", "second" can be explicitly or implicitly included one or more features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0019] So far, the valve rod of the check valve is directly connected with the valve cover, when the fluid entering the check valve contains sludge and sand, the sludge, sand and other particulate matter are easy to enter the gap between the valve rod and the valve cover guide hole, so that the valve rod is stuck, which affects the normal operation of the check valve, in order to solve the above technical problems, the technical scheme is as follows:

[0020] Referring to Figs. 1-3 The structure includes: a valve body 1, an inner cavity is formed in the valve body 1, the bottom of the inner cavity is a water inlet, and the top of the inner cavity is a water outlet, a valve flap 2 is arranged at the water inlet, a valve rod 3 is arranged at the top of the valve flap 2, a guide bracket 4 is arranged at the water outlet, a shaft sleeve 5 is arranged in the middle of the guide bracket 4, an elastic element 6 is arranged between the guide bracket 4 and the valve flap 2, the elastic element 6 seals and abuts the water inlet, a linear bearing 7 is fixed in the shaft sleeve 5, the linear bearing 7 and the shaft sleeve 5 are in interference fit, a guide hole 71 is formed in the linear bearing 7 and slidably connected with the valve rod 3, a plurality of drainage grooves 72 extending along the axial direction of the valve rod 3 are arranged in the guide hole 71 in an annular array, and the drainage grooves 72 penetrate the upper and lower ends of the linear bearing 7, and an opening is formed in the top of the shaft sleeve 5 and connected with the water outlet and the drainage grooves 72.

[0021] Therefore, the linear bearing 7 is knocked into the shaft sleeve 5 from the bottom of the shaft sleeve 5, in use, the fluid pushes the valve flap 2 to move upward through the water inlet at the bottom of the valve body 1, the valve flap 2 extrudes the elastic element 6 and drives the valve rod 3 to move upward along the linear bearing 7, so that the fluid enters the inner cavity of the valve body 1 and is discharged through the water outlet.

[0022] The guide bracket 4 and the shaft sleeve 5 are integrated.

[0023] In addition, the top of the shaft sleeve 5 is provided with an inwardly extending clamping block for fixing the linear bearing 7.

[0024] Specifically, in use, when the particles such as sludge and sand in the fluid enter the gap between the linear bearing 7 and the valve rod 3, the particles are collected in the drain groove 72, and at the same time, the fluid flows upward in the drain groove 72, the particles move along the flow direction of the fluid, and finally are discharged outward through the opening on the shaft sleeve 5, thereby avoiding the situation that the particles such as sludge and sand in the fluid cause the valve rod to be stuck, and ensuring the normal work of the check valve.

[0025] Meanwhile, in order to facilitate the installation and disassembly of the guide bracket 4, the guide bracket 4 is locked and connected with the valve body 1 through the inner hexagonal flat end set screw 8, when installing, the guide bracket 4 is aligned with the mounting hole of the inner wall of the water outlet of the valve body 1, the inner hexagonal flat end set screw 8 is inserted, and the screw is tightened by using a tool, when disassembling, the hexagonal flat end set screw 8 is unscrewed, which not only ensures the stability of the connection between the guide bracket 4 and the valve body 1, but also facilitates the installation and disassembly of the guide bracket 4 during the maintenance process.

[0026] The elastic member 6 is a spiral spring, and the upper and lower ends are respectively abutted against the bottom surface of the guide bracket 4 and the top surface of the valve disc 2, therefore, in use, when the bottom surface of the valve disc 2 is subjected to the upward pressure of the fluid, the valve disc 2 extrudes the spiral spring and moves upward, when the fluid pressure disappears, the spiral spring resets and pushes the bottom surface of the valve disc 2 to keep the sealing state with the water inlet of the valve body 1, thereby ensuring the normal opening and closing of the valve disc 2 of the check valve, and preventing the reverse fluid leakage.

[0027] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, for those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A self-cleaning antisurge valve, comprising: Valve body (1), the inner chamber is opened in the valve body (1), the inner chamber bottom is water inlet, the inner chamber top is water outlet, the water inlet is equipped with valve clapper (2), the valve clapper (2) top is equipped with valve stem (3), the water outlet is equipped with guide support (4), the guide support (4) middle is equipped with shaft sleeve (5), the guide support (4) with valve clapper (2) between be equipped with the elastic member (6) of push valve clapper (2) sealed and touch in the water inlet, its characterized in that: the shaft sleeve (5) is fixed with linear bearing (7) in, the linear bearing (7) with shaft sleeve (5) uses excess fit, the linear bearing (7) is opened in the guide hole (71) of sliding fit with valve stem (3), the guide hole (71) is annular array with several drainage groove (72) in, and the drainage groove (72) is along the axial extension of valve stem (3) and is passed through in the upper and lower ends of linear bearing (7), the shaft sleeve (5) top is equipped with the opening of drainage groove (72) and water outlet intercommunication.

2. A self-cleaning silent check valve according to claim 1, wherein: The guide support (4) is locked and connected with the valve body (1) through the inner hexagonal flat end locking screw (8).

3. A self-cleaning silent check valve according to claim 1 or 2, wherein: The elastic member (6) is a spiral spring, and the upper and lower ends are respectively abutted with the bottom surface of the guide support (4) and the top surface of the valve clapper (2).

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