CN214500151U

CN214500151U - PVC slowly-closed type waterproof hammer check valve

Info

Publication number: CN214500151U
Application number: CN202120560775.XU
Authority: CN
Inventors: 吴强
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-18
Filing date: 2021-03-18
Publication date: 2021-10-26
Anticipated expiration: 2031-03-18

Abstract

The utility model relates to the technical field of check valves, in particular to a PVC slow-closing type water hammer-proof check valve, which comprises a valve body, a detachable loose joint connected at one end of the valve body and a loose joint nut used for connecting the valve body and the detachable loose joint; a valve body connecting sealing ring is arranged at the joint of the valve body and the detachable loose joint, a slowly-closed cavity is arranged inside the valve body, a sliding cylinder is arranged inside the slowly-closed cavity, a slowly-closed moving piston is arranged inside the sliding cylinder, a metal connecting rod is arranged at one end of the slowly-closed moving piston, the other end of the metal connecting rod penetrates through the slowly-closed cavity to extend outwards, and the extending end of the metal connecting rod is connected with a water stop valve block; the slow-closing cavity is provided with a mounting hole on one end face of the water stop valve plate, and a fluid one-way rubber plug is arranged in the mounting hole. The utility model discloses effectively prevent that the water hammer from producing, better protection pipeline and water cycle equipment life effectively avoid appearing because of the pipeline that the water hammer appears breaks, the interface is in the twinkling of an eye pressurized phenomenon such as come unstuck, the water pump damages.

Description

PVC slowly-closed type waterproof hammer check valve

Technical Field

The utility model relates to a check valve technical field specifically is waterproof hammer check valve of PVC slow-closure type.

Background

The check valve is also called a one-way valve or a check valve and is used for preventing media in the pipeline from flowing backwards. The bottom valve of the suction pipe of the water pump also belongs to the check valve class. The opening and closing piece is opened or closed by medium flow and force to prevent the medium from flowing backwards. The check valve belongs to the automatic valve class, is mainly used on the pipeline of medium unidirectional flow, only allows the medium to flow in one direction, prevents the medium refluence. The check valve is divided into three types, namely a lifting check valve, a swing check valve and a butterfly check valve according to the structure. The lift check valve can be divided into a vertical type and a horizontal type. Swing check valves are classified into single-flap type, double-flap type and multi-flap type, and are generally installed horizontally. The butterfly check valve includes a swing check valve and a lift check valve. The connection modes of the check valves can be divided into three types, namely threaded connection, flange connection and welding. Most of the existing PVC check valves (one-way valves) are fluid opening and closing pieces, and part of the existing PVC check valves are supported and fixedly opened by spring reset;

present PVC flap check valve belongs to the single lamella formula check valve among the swing check valve, and the valve clack is fixed usually in the inside one side of valve body, and supplementary reseing is ended through the spring, and the valve clack can "close in the twinkling of an eye" when the fluid flows against the current, and the intraductal pressure that the lift is high can generate the water hammer effect by the violent rising in the twinkling of an eye, produces adverse effect to pipeline and water pumping equipment.

The existing check valve with the PVC spherical valve core belongs to a lifting check valve, and when fluid flows reversely, the spherical valve core is extruded and attached to a sealing rubber ring fixed on a valve body under the action of water flow so as to achieve the stop action, and the existing check valve also belongs to an instant closing check valve, has impact influence on pipelines and equipment, and is not beneficial to the service life.

In order to effectively prevent a water hammer in a water pipe from generating, better protect the service life of a pipeline and water circulation equipment and effectively avoid the phenomena of pipeline breakage, instant pressure degumming of a connector, water pump damage and the like caused by the water hammer, the PVC slowly-closed type waterproof hammer check valve is provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a PVC slowly closes type waterproof hammer check valve to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the PVC slow-closing type waterproof hammer check valve comprises a valve body, a detachable loose joint connected to one end of the valve body, and a loose joint nut used for connecting the valve body and the detachable loose joint; a valve body connecting sealing ring is arranged at the joint of the valve body and the detachable loose joint, a slowly-closed cavity is arranged inside the valve body, a sliding cylinder is arranged inside the slowly-closed cavity, a slowly-closed moving piston is arranged inside the sliding cylinder, a metal connecting rod is arranged at one end of the slowly-closed moving piston, the other end of the metal connecting rod penetrates through the slowly-closed cavity to extend outwards, and the extending end of the metal connecting rod is connected with a water stop valve block; the slow-closing cavity is provided with a mounting hole on one end face of the water stop valve plate, and a fluid one-way rubber plug is arranged in the mounting hole.

As a further aspect of the present invention: the inboard of valve body is closed and is equipped with four slowly-closed cavity spacing grooves, the lateral surface of slowly-closed cavity is equipped with four card wings, card wing joint is in slowly-closed cavity spacing inslot.

As a further aspect of the present invention: and metal fixing nuts are arranged on two sides of the metal connecting rod, which are positioned on the water stop valve plate, so that the water stop valve plate can be conveniently fixed on the metal connecting rod.

As a further aspect of the present invention: a gap is reserved between the metal connecting rod and the slowly-closed cavity, and the gap is 0.2 mm.

As a further aspect of the present invention: the caliber of the water inlet end of the valve body is smaller than the inner diameter of the valve body.

As a further aspect of the present invention: the diameter of the water stop valve sheet is larger than the caliber of the water inlet of the valve body, and the diameter of the water stop valve sheet is smaller than the inner diameter of the valve body, so that the water stop valve sheet can close the water inlet when fluid media reversely flow.

Compared with the prior art, the utility model has the advantages of following several aspects:

the utility model provides a novel PVC slow-closing type waterproof hammer check valve, when liquid flows in the forward direction, when water flow pushes a water stop valve clack to move, a piston in a slow-closing cavity also moves synchronously and sucks the liquid to enter the cavity to form a buffer liquid column; when fluid medium reversely flows, water flow thrust can reversely push the water stop valve clack, but because liquid in the slowly-closed cavity cannot be quickly emptied, the liquid can only be slowly released from the hole of the connecting rod to form hydraulic buffering, so the water stop valve clack can be completely reset within about 2-3 seconds to achieve the effect of stopping the liquid, the liquid in the pipeline is not stopped instantly in the process of the process but stopped in the buffering and releasing process, the effect effectively reduces the instant pressure in the pipeline, the water hammer is effectively prevented from being generated, the service life of the pipeline and the water circulation equipment is better protected, and the phenomena of pipeline breakage, interface instant pressure degumming, water pump damage and the like caused by the water hammer are effectively avoided.

Drawings

Fig. 1 is a schematic structural view of a PVC slow-closing type water hammer-proof check valve.

Fig. 2 is a schematic sectional view of a PVC slow-closing type water hammer-proof check valve.

Fig. 3 is a schematic structural view of a slow-closing cavity in a PVC slow-closing type waterproof hammer check valve.

Fig. 4 is a schematic structural view of a valve body in a PVC slow-closing type water hammer-proof check valve.

Fig. 5 is a schematic bottom view of a slowly-closing cavity of the PVC slowly-closing type water hammer-proof check valve.

Fig. 6 is a schematic side view of a slowly-closing cavity in a PVC slowly-closing type water hammer-proof check valve.

In the figure: 1. a valve body; 11. slowly closing the cavity limiting groove; 2. the loose joint can be disassembled; 3. a loose joint screw cap; 4. the valve body is connected with a sealing ring; 5. slowly closing the cavity; 51. mounting holes; 52. a fluid one-way rubber plug; 6. slowly closing the movable piston; 7. a metal connecting rod; 8. a metal fixing nut; 9. a water stop valve plate.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Referring to fig. 1-6, the PVC slow-closing type water hammer-proof check valve includes a valve body 1, a detachable loose joint 2 connected to one end of the valve body 1, and a loose joint nut 3 for connecting the valve body 1 and the detachable loose joint 2; a valve body connecting sealing ring 4 is arranged at the joint of the valve body 1 and the detachable loose joint 2, a slowly-closed cavity 5 is arranged inside the valve body 1, a sliding cylinder is arranged inside the slowly-closed cavity 5, a slowly-closed moving piston 6 is arranged inside the sliding cylinder, a metal connecting rod 7 is arranged at one end of the slowly-closed moving piston 6, the other end of the metal connecting rod 7 penetrates through the slowly-closed cavity 5 to extend outwards, and the extending end of the metal connecting rod 7 is connected with a water stop valve block 9; the slow-closing cavity 5 is provided with a mounting hole 51 on one end face of the water stop valve plate 9, and a fluid one-way rubber plug 52 is arranged in the mounting hole 51.

Four slowly-closed cavity limiting grooves 11 are arranged on the inner side of the valve body 1 in a closed mode, four clamping wings are arranged on the outer side face of the slowly-closed cavity 5 and clamped in the slowly-closed cavity limiting grooves 11, and when the valve body is used, the clamping wings of the slowly-closed cavity 5 are correspondingly clamped in the slowly-closed cavity limiting grooves 11, so that the slowly-closed cavity 5 is fixed.

The metal connecting rod 7 is provided with metal fixing nuts 8 on both sides of the water stop valve plate 9, so that the water stop valve plate 9 can be conveniently fixed on the metal connecting rod 7.

A gap is reserved between the metal connecting rod 7 and the slowly-closed cavity 5, the gap is 0.2mm, and when fluid media reversely flow, water columns in the slowly-closed cavity 5 slowly flow out of the gap to play a role in buffering.

The caliber of the water inlet end of the valve body 1 is smaller than the inner diameter of the valve body 1.

The diameter of the water stop valve plate 9 is larger than the caliber of the water inlet of the valve body 1, and the diameter of the water stop valve plate 9 is smaller than the inner diameter of the valve body 1, so that the water stop valve plate 9 can close the water inlet when fluid media reversely flow.

The utility model discloses a theory of operation is: the utility model provides a novel PVC slow-closing type water hammer-proof check valve, when the liquid flows in the forward direction, when the water flow pushes the water stop valve clack to move, the piston in the slow-closing cavity 5 also moves synchronously and sucks the liquid from the fluid one-way rubber plug 52 to enter the cavity to form a buffer liquid column, and the water flow circulates from the clamping wing clearance outside the slow-closing cavity 5; when fluid medium reversely flows, water flow thrust can reversely push the water stop valve piece 9, but because liquid in the slowly-closed cavity 5 cannot be quickly emptied, the liquid can only slowly flow out from a gap reserved between the metal connecting rod 7 and the slowly-closed cavity 5 to form hydraulic buffering, the check valve piece 9 can be completely reset within about 2-3 seconds to achieve the effect of stopping the liquid, the liquid in the pipeline is not stopped instantly in the process, but stopped in the buffering and releasing process, the effect effectively reduces the instant pressure in the pipeline, effectively prevents water hammer from generating, better protects the service lives of the pipeline and water circulation equipment, and effectively avoids the phenomena of pipeline breakage, interface instant pressure degumming, water pump damage and the like caused by the water hammer.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.

Claims

The PVC slow-closing type waterproof hammer check valve is characterized by comprising a valve body (1), a detachable loose joint (2) connected to one end of the valve body (1), and a loose joint nut (3) used for connecting the valve body (1) and the detachable loose joint (2); a valve body connecting sealing ring (4) is arranged at the joint of the valve body (1) and the detachable loose joint (2), a slowly-closed cavity (5) is arranged inside the valve body (1), a sliding cylinder is arranged inside the slowly-closed cavity (5), a slowly-closed moving piston (6) is arranged inside the sliding cylinder, a metal connecting rod (7) is arranged at one end of the slowly-closed moving piston (6), the other end of the metal connecting rod (7) penetrates through the slowly-closed cavity (5) to extend outwards, and the extending end of the metal connecting rod (7) is connected with a water stop valve block (9); the slow-closing cavity (5) is provided with a mounting hole (51) on one end face of the water stop valve plate (9), and a fluid one-way rubber plug (52) is arranged in the mounting hole (51).
2. The PVC slow-closing type waterproof hammer check valve according to claim 1, wherein four slow-closing cavity limiting grooves (11) are formed in the inner side of the valve body (1), four clamping wings are arranged on the outer side surface of the slow-closing cavity (5), and the clamping wings are clamped in the slow-closing cavity limiting grooves (11).
3. The PVC slow-closing type waterproof hammer check valve according to claim 1, wherein metal fixing nuts (8) are arranged on two sides of the metal connecting rod (7) on the waterproof valve plate (9).
4. The PVC slow-closing type waterproof hammer check valve according to claim 3, wherein a gap is reserved between the metal connecting rod (7) and the slow-closing cavity (5).
5. The PVC slow closing type waterproof hammer check valve according to claim 4, wherein the gap is 0.2 mm.
6. The PVC slow-closing type waterproof hammer check valve according to claim 1, wherein the caliber of the water inlet end of the valve body (1) is smaller than the inner diameter of the valve body (1).
7. The PVC slow-closing type waterproof hammer check valve of claim 6, wherein the diameter of the water stop valve sheet (9) is larger than the caliber of a water inlet of the valve body (1), and the diameter of the water stop valve sheet (9) is smaller than the inner diameter of the valve body (1).