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CN-224228980-U - Overflow valve and hydraulic tool

CN224228980UCN 224228980 UCN224228980 UCN 224228980UCN-224228980-U

Abstract

The present application relates to an overflow valve and a hydraulic tool, the overflow valve comprises a valve body, a plunger, an elastic piece and a steel ball. The valve body is provided with an overflow cavity, an oil inlet and an oil outlet which are communicated with the overflow cavity, the plunger is movably arranged on the valve body, a first end of the plunger is positioned outside the valve body, a second end of the plunger stretches into the overflow cavity of the valve body, a plunger boss is radially formed on the plunger, the oil outlet is arranged on one side of the plunger boss close to the oil inlet, the elastic piece is abutted between the plunger boss and the valve body, the steel ball is abutted with the second end of the plunger, the plunger abuts against the steel ball at the port of the oil inlet under the action of the elastic piece during pressure maintaining, and high-pressure oil overcomes the action force of the elastic piece to abut against the steel ball at the port of the oil inlet during pressure relief. The overflow valve can improve the oil unloading speed, so that the actual working efficiency of the hydraulic tool is improved.

Inventors

  • Mei Yingyou
  • HE XIAOCHEN

Assignees

  • 江苏东成工具科技有限公司

Dates

Publication Date
20260512
Application Date
20250529

Claims (10)

  1. 1. An overflow valve, comprising: The valve comprises a valve body (100), wherein the valve body (100) is provided with an overflow cavity (110), and an oil inlet hole (120) and an oil outlet hole (130) which are communicated with the overflow cavity (110); The plunger (200) is movably arranged on the valve body (100), a first end of the plunger (200) is positioned outside the valve body (100), a second end of the plunger extends into the overflow cavity (110) of the valve body (100), a plunger boss (210) is radially formed on the plunger (200), and the oil outlet (130) is arranged on one side, close to the oil inlet (120), of the plunger boss (210); An elastic member (700) abutting between the plunger boss (210) and the valve body (100); A steel ball (300) which is abutted with the second end of the plunger (200); When pressure is maintained, the plunger (200) pushes the steel ball (300) against the port of the oil inlet hole (120) under the action of the elastic piece (700), and when pressure is released, high-pressure oil overcomes the acting force of the elastic piece (700) to push the steel ball (300) away from the port of the oil inlet hole (120).
  2. 2. The overflow valve according to claim 1, characterized in that in the oil feed direction, the lowest point of the port of the oil outlet hole (130) formed on the valve body (100) is parallel to the highest point of the port of the oil inlet hole (120) formed on the valve body (100).
  3. 3. The relief valve according to claim 1, characterized in that in the oil feed direction, the port of the oil outlet hole (130) formed in the valve body (100) coincides at least partially with the port of the oil inlet hole (120) formed in the valve body (100) in the axial direction.
  4. 4. The relief valve according to claim 1, characterized in that said elastic member (700) is a spring, said spring being sleeved on the outer periphery of said plunger (200).
  5. 5. The overflow valve according to claim 1, characterized in that the valve body (100) and the plunger (200) cooperate to form a mounting groove (140) with a notch facing the elastic member (700), a sealing ring (400) is arranged in the mounting groove (140) to seal the valve body (100) and the plunger (200), a gasket (500) is arranged on one side, close to the elastic member (700), of the sealing ring (400), the gasket (500) is sleeved on the plunger (200), and the elastic member (700) abuts against the gasket (500).
  6. 6. The overflow valve according to claim 1, characterized in that an end of the valve body (100) is formed with a mounting opening (150); The overflow valve further comprises a pressing sleeve (600), and the pressing sleeve (600) is fixedly and hermetically connected with the mounting port (150).
  7. 7. The overflow valve according to claim 1, characterized in that the port of the oil inlet hole (120) facing the steel ball (300) is formed with a first arc-shaped groove (121) attached to the surface of the steel ball (300).
  8. 8. The overflow valve according to claim 1, characterized in that one end of the plunger (200) abutting against the steel ball (300) is formed with a second arc-shaped groove (220) abutting against the surface of the steel ball (300).
  9. 9. The relief valve of claim 1, wherein a diameter of the plunger boss (210) is less than an inner diameter of the relief cavity (110).
  10. 10. A hydraulic tool comprising a cylinder, a tank and an overflow valve according to any one of claims 1 to 9, said overflow valve being in communication with said cylinder and said tank, respectively, for discharging oil between said cylinder and said tank.

Description

Overflow valve and hydraulic tool Technical Field The application relates to the technical field of hydraulic tools, in particular to an overflow valve and a hydraulic tool. Background In the existing hydraulic tool, the overflow valve pushes up the valve core through high-pressure oil formed by the rollback of the oil cylinder spring, so that the oil cylinder, the overflow valve and the oil tank are communicated to finish oil discharge. In the working process, users often want to realize quick oil discharge, and the existing tools have slow oil discharge speed and unstable fluid flow speed, so that the actual working efficiency is low. Disclosure of utility model Aiming at the defects of the prior art, the application aims to provide an overflow valve and a hydraulic tool, wherein the overflow valve can improve the oil unloading speed, so that the actual working efficiency of the hydraulic tool is improved. The application solves the problems in the prior art by adopting the following technical scheme: In a first aspect, the present application provides an overflow valve comprising a valve body, a plunger, and an elastic member. The valve body is provided with an overflow cavity, an oil inlet and an oil outlet which are communicated with the overflow cavity, the plunger is movably arranged on the valve body, a first end of the plunger is located outside the valve body, a second end of the plunger stretches into the overflow cavity of the valve body, a plunger boss is radially formed on the plunger, the oil outlet is arranged on one side, close to the oil inlet, of the plunger boss, an elastic piece is abutted between the plunger boss and the valve body, a steel ball is abutted with the second end of the plunger, during pressure maintaining, the plunger abuts against the steel ball on a port of the oil inlet under the action of the elastic piece, and during pressure relief, high-pressure oil overcomes the action of the elastic piece to abut against the steel ball on the port of the oil inlet. Optionally, in the oil inlet direction, a lowest point of a port formed on the valve body by the oil outlet is flush with a highest point of a port formed on the valve body by the oil inlet. Optionally, in the oil inlet direction, a port formed on the valve body by the oil outlet is at least partially overlapped with a port formed on the valve body by the oil inlet. Optionally, the elastic element is a spring, and the spring is sleeved on the periphery of the plunger. Optionally, the valve body with cooperate between the plunger to form the notch orientation the mounting groove of elastic component, be provided with the sealing washer in the mounting groove in order to seal the valve body with the plunger, the sealing washer is close to one side of elastic component is provided with the gasket, the gasket cover is established on the plunger, just the elastic component butt is in on the gasket. Optionally, an installation opening is formed at one end of the valve body. The overflow valve further comprises a pressing sleeve, and the pressing sleeve is fixedly and hermetically connected with the mounting port. Optionally, a first arc-shaped groove attached to the surface of the steel ball is formed in the oil inlet towards the port of the steel ball. Optionally, a second arc-shaped groove attached to the surface of the steel ball is formed at one end of the plunger, which abuts against the steel ball. Optionally, the diameter of the plunger boss is smaller than the inner diameter of the overflow chamber. In a second aspect, the present application further provides a hydraulic tool, including an oil cylinder, an oil tank, and an overflow valve according to any embodiment of the first aspect, where the overflow valve is respectively connected to the oil cylinder and the oil tank, and is used for discharging oil between the oil cylinder and the oil tank. Compared with the prior art, the hydraulic oil pump has the advantages that the oil inlet and the oil outlet are arranged on the same side of the plunger boss, the hydraulic oil can discharge oil only by pushing the steel ball apart for a small distance, and compared with the oil inlet and the oil outlet which are respectively arranged on two sides of the plunger boss, the hydraulic oil pump can realize quick oil discharge. Drawings The following describes the embodiments of the present application in further detail with reference to the accompanying drawings: FIG. 1 is a schematic diagram of a structure of an overflow valve for sealing an oil inlet by a steel ball; FIG. 2 is a schematic diagram of the structure of the relief valve in the oil discharge state, wherein the arrows indicate the flow direction of hydraulic oil; FIG. 3 is a schematic diagram of an overflow valve according to the present application; fig. 4 is a schematic structural view of another relief valve according to the present application. Meaning of reference numerals in the drawings: 100. Valve body 110,