CN-224229341-U - Eccentric reducing check valve

CN224229341UCN 224229341 UCN224229341 UCN 224229341UCN-224229341-U

Abstract

The utility model relates to the field of check valves, and particularly discloses an eccentric reducing check valve which comprises a protective top cover, a check valve main body, a liquid inlet head, a liquid outlet head and a valve plate. The valve plate is arranged, the limiting guide opening can be externally sealed through the valve plate, the sealing plug is arranged in the middle of the bottom end of the valve plate, the limiting guide opening can be reinforced and sealed through the sealing plug, so that the sealing effect on a valve port can be improved, the telescopic rod is arranged at the top of the valve plate, the top end of the telescopic rod and the reset spring can automatically reset and seal the valve plate, the second flange plate is arranged at the top of the check valve body, the first flange plate is arranged at the bottom of the protective top cover, and the assembly with the second flange plate is facilitated through the first flange plate.

Inventors

ZOU LI
WANG XIAOXIANG
SUN HUANWEN
CHEN ZHICHENG

Assignees

上海良工阀门厂有限公司

Dates

Publication Date: 20260512
Application Date: 20250530

Claims (3)

1. The eccentric reducing check valve is characterized in that a limiting guide opening (10) is formed in the check valve body (4), the valve plate (9) is sealed in the limiting guide opening (10), the liquid inlet head (5) and the liquid outlet head (7) are arranged on the check valve body (4) in the mutually perpendicular direction, the protective top cover (1) is arranged at the top of the check valve body (4), a reset spring (13) is arranged in the protective top cover (1), a telescopic rod (11) of the reset spring (13) is connected with the top of the valve plate (9), a sealing plug (12) is arranged at the bottom of the valve plate (9), a flexible buffer layer is arranged on the side of the sealing plug (12), the sealing plug (12) is sealed in the limiting guide opening (10), the inner diameter of the liquid inlet head (5) is set from small to large, and the inner diameter of the liquid outlet head (7) is set from large to small.
2. The eccentric reducing check valve of claim 1, wherein a first flange plate (2) is arranged at the end part of the protective top cover (1), a second flange plate (3) is arranged at the top end of the check valve main body (4), and the first flange plate (2) and the second flange plate (3) are in flange fixation.
3. The eccentric reducing check valve according to claim 1, wherein a third flange plate (6) is arranged at the end part of the liquid inlet head (5), and a fourth flange plate (8) is arranged at the end part of the liquid outlet head (7).

Description

Eccentric reducing check valve Technical Field The utility model relates to the field of check valves, in particular to an eccentric reducing check valve. Background The check valve is a valve with a circular valve clack as an opening and closing part and can stop the medium from flowing backwards by the action of the self weight and the medium pressure. Belongs to automatic valves, which are also called check valves, one-way valves, reflux valves or isolation valves. The movement modes of the valve clack are divided into a lifting type and a swing type. The lifting check valve is similar to a stop valve in structure, and only lacks a valve rod for driving the valve clack. The medium flows in from the inlet end (lower side) and flows out from the outlet end (upper side). When the inlet pressure is greater than the sum of the valve flap weight and its flow resistance, the valve is opened. Otherwise, the valve is closed when the medium flows backwards. The swing check valve has a valve clack which is inclined and can rotate around the shaft, and the working principle is similar to that of the lifting check valve. Check valves are commonly used as bottom valves for pumping devices to prevent backflow of water. The stop valve and the stop valve are combined for use, so that the safety isolation function can be realized. The disadvantage is that the resistance is large and the tightness is poor when the valve is closed; The patent (eccentric reducing check valve) with publication number CN222316037U includes valve body, valve seat and valve clack, the valve seat is set in the radial annular step between the inlet pipeline and the outlet pipeline of valve body, and features that the inlet pipeline consists of small diameter pipeline, expanded diameter pipeline and large diameter pipeline, the inlet end of valve body may be connected directly to the outlet pipeline of water pump, and has less pipeline installing parts. The device has the advantages of simple structure, convenient installation, low installation cost and the like; The check valve in the prior art cannot control the direction of the discharged water flow, is inconvenient to control the flow of the water flow, has insufficient limiting sealing effect on the limiting guide opening, and cannot perform secondary reinforced sealing control. Disclosure of utility model The utility model aims to provide an eccentric reducing check valve, which solves the problems that the check valve provided in the background art cannot control the direction of discharged water flow, is inconvenient for controlling the flow of the water flow, has insufficient limiting sealing effect on a limiting guide port and cannot perform secondary reinforced sealing control. In order to achieve the purpose, the eccentric reducing check valve comprises a protective top cover, a check valve main body, a liquid inlet head, a liquid outlet head and a valve plate, wherein a limiting guide opening is formed in the check valve main body, the valve plate is sealed in the limiting guide opening, the liquid inlet head and the liquid outlet head are arranged on the check valve main body in mutually perpendicular directions, and the protective top cover is arranged on the top of the check valve main body. In a further embodiment, the end of the protective top cover is provided with a first flange plate, the top end of the check valve body is provided with a second flange plate, and the first flange plate and the second flange plate are fixed in a flange manner. In a further embodiment, a third flange plate is arranged at the end part of the liquid inlet head, and a fourth flange plate is arranged at the end part of the liquid outlet head. In a further embodiment, a return spring is arranged in the protective top cover, a telescopic rod of the return spring is arranged in the protective top cover, and a telescopic end of the telescopic rod is connected with the top of the valve plate. In a further embodiment, a sealing plug is arranged at the bottom of the valve plate, a flexible buffer layer is arranged on the side of the sealing plug, and the sealing plug is sealed in the limiting guide opening. In a further embodiment, the inner diameter of the liquid inlet head is set from small to large, and the inner diameter of the liquid outlet head is set from large to small. Compared with the prior art, the utility model has the beneficial effects that: The valve plate is arranged, the limiting guide opening can be externally sealed through the valve plate, the sealing plug is arranged in the middle of the bottom end of the valve plate, the limiting guide opening can be reinforced and sealed through the sealing plug, so that the sealing effect on the valve port can be improved, the telescopic rod is arranged at the top of the valve plate, and the top end of the telescopic rod and the reset spring can be used for automatically resetting and sealing the valve plate. The top of the check valve main body is