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CN-224214769-U - Two-way check valve

CN224214769UCN 224214769 UCN224214769 UCN 224214769UCN-224214769-U

Abstract

The utility model relates to the technical field of valves, in particular to a two-way check valve, which comprises a water inlet pipe and a water outlet pipe connected to one side of the water inlet pipe, wherein a central pipe is fixedly connected in the water outlet pipe, two ends of the central pipe are fixedly connected with valve plates, one sides of the two groups of valve plates, which are close to each other, are respectively provided with a valve body, one ends of the two groups of valve plates, which are far away from each other, are respectively connected with a locating rack through a movable rod, the locating racks are fixed in the water inlet pipe, one side of the valve body, which is close to the movable rod, is provided with a conical surface, and a water passing hole is formed in the valve plate.

Inventors

  • ZHANG RUI
  • LIU CHUN
  • CHEN TINGRUI

Assignees

  • 江苏联新阀门有限公司

Dates

Publication Date
20260508
Application Date
20250617

Claims (7)

  1. 1. A two-way check valve, which comprises a water inlet pipe (1) and a water outlet pipe (2) connected with one side of the water inlet pipe (1); The water outlet pipe is characterized in that a central pipe (3) is fixedly connected in the water outlet pipe (2), two ends of the central pipe (3) are fixedly connected with valve plates (5), one sides of the two groups of valve plates (5) close to each other are respectively provided with a valve body (7), one ends of the two groups of valve bodies (7) far away from each other are connected with a locating frame (6) through a movable rod (8), and the locating frames (6) are fixed in the water inlet pipe (1); A conical surface is arranged on one side, close to the movable rod (8), of the valve body (7), a water passing hole (15) is formed in the valve plate (5), and one side of the water passing hole (15) is abutted to the conical surface; The central tube (3) is provided with a water outlet (4) communicated with the water outlet tube (2), and a position-adjustable blocking piece is arranged in the central tube (3) and used for blocking the water outlet (4) to control the on-off of liquid flow.
  2. 2. The bi-directional check valve of claim 1 wherein the movable rod (8) comprises a sleeve (801) and a rod body (802) with an end portion slidably connected in the sleeve (801), wherein one end of the rod body (802) extending into the sleeve (801) is fixedly connected with a reset spring (803) installed in the sleeve (801), one end of the sleeve (801) is fixedly connected with a positioning frame (6), and one end of the rod body (802) is fixedly connected with the valve body (7).
  3. 3. A bi-directional check valve according to claim 2 wherein the area of the side of the valve body (7) adjacent to the movable rod (8) is smaller than the area of the side of the valve body (7) away from the movable rod (8).
  4. 4. The bi-directional check valve of claim 1 wherein the plugging member comprises a plugging core (9) and a screw rod (11) rotatably connected to one side of the plugging core (9), a sealing thread sleeve in threaded connection with the screw rod (11) is arranged on the central tube (3), a through hole through which the sealing thread sleeve passes is arranged on the outer wall of the water inlet tube (1), and one end of the screw rod (11) far away from the plugging core (9) extends to the outer part of the sealing thread sleeve to be fixedly connected with a rotary handle (12).
  5. 5. The bi-directional check valve of claim 4, wherein a protrusion (10) is disposed on the inner wall of the central tube (3), a through hole communicating with the water outlet (4) is disposed on the protrusion (10), a contact plane abutting against the plugging core (9) is disposed on one side of the protrusion (10), an abutting plane is disposed on one side of the plugging core (9) close to the protrusion (10), and an arc-shaped surface is disposed on one side of the plugging core (9) far away from the protrusion (10).
  6. 6. A bi-directional check valve according to claim 1 wherein the outer wall of the valve plate (5) is fixedly attached to the inner wall of the inlet pipe (1).
  7. 7. A bi-directional check valve according to claim 1 wherein the inlet pipe (1) has a first flange (13) at both ends and the outlet pipe (2) has a second flange (14) at one end.

Description

Two-way check valve Technical Field The utility model relates to the technical field of valves, in particular to a two-way check valve. Background A two-way check valve is a specially designed valve whose core function is to allow fluid flow in either direction, but at the same time to prevent reverse flow. The valve is widely applied to occasions needing bidirectional flow control but needing backflow prevention, such as a hydraulic system, water supply and drainage engineering, chemical processes and the like, and two independent fluid channels are arranged in the bidirectional check valve and correspond to two flow directions respectively. In the existing two-way check valve, corresponding flow passages are arranged for liquid inlet and liquid outlet, and the two groups of liquid outlet flow passages are required to be connected independently. In a bi-directional check valve disclosed in the prior patent publication No. CN222163649U, the bi-directional check valve comprises a valve main body, two water inlet pipelines for water inlet are provided on the valve main body, water outlet pipelines for water outlet are provided on the upper and lower ends of the valve main body, valve switches for controlling the internal circulation of the water inlet pipelines are respectively provided on the two valve main bodies and corresponding to the positions of the water inlet pipelines, two check pieces for check are respectively provided on the positions of the two water outlet pipelines, a filter piece for filtering the liquid in the two pipelines is provided between the two water outlet pipelines, and the check pieces comprise a fixing seat, a check part, a connecting seat and a reset spring. In the two-way check valve, the double-inlet and double-outlet design needs two groups of independent check pieces, a water outlet pipeline and the like, so that a fluid path is increased, and the arrangement of external pipeline connection is inconvenient. In view of the above, a two-way check valve is proposed. Disclosure of utility model The present utility model is directed to a bi-directional check valve to solve the above-mentioned problems. In order to achieve the above purpose, the present utility model provides the following technical solutions: A two-way check valve comprises a water inlet pipe and a water outlet pipe connected to one side of the water inlet pipe; The water outlet pipe is internally and fixedly connected with a central pipe, two ends of the central pipe are fixedly connected with valve plates, one sides of the two groups of valve plates, which are close to each other, are respectively provided with a valve body, one ends of the two groups of valve bodies, which are far away from each other, are respectively connected with a positioning frame through a movable rod, and the positioning frames are fixed in the water inlet pipe; the valve body is provided with a conical surface close to one side of the movable rod, the valve plate is provided with a water passing hole, and one side of the water passing hole is abutted against the conical surface; The central tube is provided with a water outlet communicated with the water outlet pipe, and a position-adjustable blocking piece is arranged in the central tube and used for blocking the water outlet so as to control the on-off of liquid flow. In an alternative scheme, the movable rod comprises a sleeve and a rod body with the end part in sliding connection in the sleeve, one end of the rod body extending into the sleeve is fixedly connected with a reset spring arranged in the sleeve, one end of the sleeve is fixedly connected with a positioning frame, and one end of the rod body is fixedly connected with a valve body. In an alternative scheme, the area of the round surface of the side, close to the movable rod, of the valve body is smaller than the area of the round surface of the side, away from the movable rod, of the valve body. In an alternative scheme, the plugging piece comprises a plugging core and a screw rod rotatably connected to one side of the plugging core, a sealing thread sleeve in threaded connection with the screw rod is arranged on the central tube, a through hole through which the sealing thread sleeve passes is arranged on the outer wall of the water inlet pipe, and one end of the screw rod, which is far away from the plugging core, extends to the outer part of the sealing thread sleeve and is fixedly connected with a rotary handle. In an alternative scheme, a bulge is arranged on the inner wall of the central tube, a through hole communicated with the water outlet is formed in the bulge, a contact plane which is abutted against the plugging core is formed in one side of the bulge, the abutting plane is formed on one side of the plugging core, which is close to the bulge, and an arc-shaped surface is formed on one side of the plugging core, which is far away from the bulge. In an alternative scheme, the outer wall of the valve plate is fi