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CN-224229339-U - Pressure-adjustable check valve

CN224229339UCN 224229339 UCN224229339 UCN 224229339UCN-224229339-U

Abstract

The utility model discloses a pressure-adjustable check valve, which comprises a valve body, a valve cavity, a water inlet, a water outlet, a valve plate, a rotating shaft, a swinging rod, a deflector rod, a tension spring, an adjusting piece and a box body, wherein the valve plate is connected with the rotating shaft through the swinging rod, one end of the rotating shaft is connected with the deflector rod, the deflector rod is connected with the adjusting piece through the tension spring, the adjusting piece controls the tension of the tension spring through an adjusting screw and a nut to adjust the opening pressure of the valve plate, the rotating shaft is arranged in a shaft seat provided with a sealing sleeve and a rubber ring, the tightness is ensured, the limit positioning is realized through the matching of a clamping table, a clamping groove and a yielding groove, the check structure is timely in response, the opening water pressure can be flexibly adjusted according to actual working conditions, and the applicability and the sealing life are improved.

Inventors

  • ZHANG SHAOHUA
  • Miao Longcheng
  • WANG MIN
  • LI WENDONG

Assignees

  • 安徽同成科技有限公司

Dates

Publication Date
20260512
Application Date
20250623

Claims (7)

  1. 1. The check valve with the adjustable pressure comprises a valve body, wherein a valve cavity (7) is formed in the inner side of the valve body, a water inlet (8) and a water outlet (6) are respectively formed in the left end and the right end of the valve body, a valve plate (1) for blocking the water inlet (8) is arranged in the inner side of the valve cavity (7), an access hole is formed in the upper end of the valve body, and an end cover (5) is arranged at the access hole, and the check valve is characterized in that an inner hollow shaft seat (15) is arranged on the left upper side of the valve body, an inner cavity of the shaft seat (15) is communicated with the valve cavity (7), a rotating shaft (2) is arranged in the inner side of the shaft seat (15), a swinging rod (3) is fixed on the right side of the valve plate (1), and the upper end of the swinging rod (3) is connected with the rotating shaft (2); The front side of valve body is fixed with box body (13), the front end of pivot (2) extends to the inboard of box body (13) and is fixed with driving lever (9) of upper right slope, the lower right side of driving lever (9) is fixed with extension spring (10), the one end of extension spring (10) is connected with and fixes regulating part (11) in box body (13), lid (12) are installed to the opening part of box body (13).
  2. 2. The pressure-adjustable check valve of claim 1, wherein through holes are formed in the front end and the rear end of the shaft seat (15), sealing screws (14) are arranged at the through holes on the rear side, sealing sleeves (16) are arranged at the through holes on the front side in a threaded manner, the sealing sleeves (16) are sleeved on the outer side of the rotating shaft (2), and a plurality of rubber rings are fixed on the inner side of the sealing sleeves (16).
  3. 3. The pressure-adjustable check valve of claim 2, wherein the rotary shaft (2) is inserted into the inner side of the shaft seat (15) through the through hole on the front side, a convex clamping table (21) is fixed at the middle part of the rotary shaft (2), and a yielding groove matched with the clamping table (21) is formed in the inner wall of the through hole on the front side.
  4. 4. The pressure-adjustable check valve of claim 3, wherein a sleeve (31) sleeved on the rotating shaft (2) is fixed at the upper end of the swing rod (3), and a clamping groove matched with the clamping table (21) is formed in the inner side of the sleeve (31).
  5. 5. The pressure-adjustable check valve as set forth in claim 1, wherein one end of the deflector rod (9) is fixed with a threaded head (92) connected with the rotating shaft (2), and the other end of the deflector rod (9) is provided with a hanging hole (91).
  6. 6. The pressure-adjustable check valve as set forth in claim 5, wherein one end of the tension spring (10) is fixed with a hook (101) hung in the hanging hole (91), and the other end of the tension spring (10) is fixed with a nut (102).
  7. 7. A pressure-adjustable check valve according to claim 6, wherein the adjusting member (11) comprises a support plate (112) fixed in the case (13), and an adjusting screw (111) connected to the nut (102) is inserted into the center of the support plate (112).

Description

Pressure-adjustable check valve Technical Field The utility model belongs to the technical field of valves, and particularly relates to a check valve with adjustable pressure. Background A check valve is a one-way valve commonly used in fluid delivery systems and is primarily intended to automatically open when fluid flows in one direction and to automatically close when a back flow trend occurs to prevent failure of the system due to back flow. At present, the check valve is widely applied to water supply and drainage, heating ventilation, fire protection and industrial pipeline systems, the structure of the check valve generally comprises a valve body, a valve plate, a rotating shaft and other basic components, and a part of the check valve is also provided with a spring or a gravity fitting for realizing the self-closing function. The existing check valve has basic backflow prevention function, but has single response capability to water flow pressure in different application scenes, and lacks flexible adjustment capability to opening pressure. Although the rough pressure adjustment is realized by replacing a spring or adjusting a limiting part, the adjusting means is often not convenient enough, the adjusting range is limited, and the opening and closing conditions of the valve can not be sensitively adjusted according to the actual water pressure change. In addition, the elastic force of the existing structure stopping mechanism is usually fixed, the valve is difficult to open when the water pressure is low, and the valve plate is possibly impacted too much when the water pressure is high, so that the system stability and the service life of the valve body are affected. Therefore, the existing check valve still has the defects in meeting the adaptability, the regulation convenience and the hydraulic response control under different pressure environments. Disclosure of utility model Aiming at the problems in the prior art, the utility model aims to provide a check valve with adjustable pressure, which can flexibly adjust the opening pressure according to the requirement so as to improve the functional performance and stability of the check valve in practical application. In order to achieve the above purpose, the present utility model provides the following technical solutions: The check valve with adjustable pressure comprises a valve body, wherein a valve cavity is formed in the inner side of the valve body, a water inlet and a water outlet are respectively formed in the left end and the right end of the valve body, a valve plate for plugging the water inlet is arranged in the inner side of the valve cavity, an overhaul port is formed in the upper end of the valve body, an end cover is arranged at the overhaul port, a shaft seat with a hollow inside is arranged on the upper left side of the valve body, an inner cavity of the shaft seat is communicated with the valve cavity, a rotating shaft is arranged in the inner side of the shaft seat, a swing rod is fixed on the right side of the valve plate, and the upper end of the swing rod is connected with the rotating shaft; The front side of the valve body is fixed with a box body, the front end of the rotating shaft extends to the inner side of the box body and is fixed with a deflector rod which inclines upwards right, the lower right side of the deflector rod is fixed with a tension spring, one end of the tension spring is connected with an adjusting piece which is fixed in the box body, and a box cover is arranged at the opening of the box body. Further, through holes are formed in the front end and the rear end of the shaft seat, sealing screws are arranged at the through holes on the rear side, sealing sleeves are arranged at the through holes on the front side in a threaded mode, the sealing sleeves are sleeved on the outer side of the rotating shaft, and a plurality of rubber rings are fixed on the inner side of the sealing sleeves. Further, the rotating shaft is inserted into the inner side of the shaft seat through the front side through hole, the middle part of the rotating shaft is fixedly provided with a convex clamping table, and the inner wall of the front side through hole is provided with a yielding groove matched with the clamping table. Further, the upper end of the swing rod is fixed with a sleeve sleeved on the rotating shaft, and a clamping groove matched with the clamping table is formed in the inner side of the sleeve. Further, one end of the deflector rod is fixed with a thread head connected with the rotating shaft, and the other end of the deflector rod is provided with a hanging hole. Further, one end of the tension spring is fixed with a hook hung in the hanging hole, and the other end of the tension spring is fixed with a nut. Further, the adjusting piece comprises a supporting plate fixed in the box body, and an adjusting screw connected with the nut is inserted in the center of the supporting plate. Compared with the prior ar