CN210034039U

CN210034039U - Hydraulic filter

Info

Publication number: CN210034039U
Application number: CN201920382728.3U
Authority: CN
Inventors: 付志民; 尚艳梅; 王塬钦; 侯金合
Original assignee: Xinxiang City Lu Kaitong Hydraulic Machinery Co Ltd
Current assignee: Xinxiang City Lu Kaitong Hydraulic Machinery Co Ltd
Priority date: 2019-03-25
Filing date: 2019-03-25
Publication date: 2020-02-07
Anticipated expiration: 2029-03-25

Abstract

The utility model discloses a hydraulic filter, including last casing and the lower casing of upper and lower sealed lock, the internal filter core of installing of inferior valve, the upper portion of going up the casing is equipped with the annunciator, install piston assembly and spring in proper order in one side cavity of annunciator casing, the end of spring compresses tightly sealedly through compressing tightly the piece, piston assembly's tip is equipped with the magnet steel, be equipped with the interface channel who feeds through piston assembly both sides cavity and inlet and liquid outlet on the annunciator casing of piston assembly both sides respectively, install micro-gap switch in the opposite side cavity of annunciator casing, micro-gap switch's front portion is equipped with the iron sheet with magnet steel looks actuation. The utility model has the advantages of the reliability is high, long service life, control quality is good, be suitable for flow pressure differential wide range, has effectively prolonged the operating cycle of fuel pump or mechanical hydraulic means system.

Description

Hydraulic filter

Technical Field

The utility model belongs to the technical field of the machine oil filter equipment, concretely relates to hydraulic filter.

Background

In existing fuel pump or mechanical hydraulic systems, pressure limiting valves are often used as safety valves to limit the maximum pressure to protect the fuel pump or to enable fuel bypass under specified conditions. After the hydraulic filter is used for a period of time, the filtering effect of the filter element is deteriorated, the difference between the internal pressure and the external pressure of the filter element is increased, the safety valve can be enabled to overcome the elastic action of the spring after the external oil pressure exceeds the internal oil pressure and reaches a certain difference value, and then the bypass valve is enabled to be opened, so that the internal side and the external side of the filter element are communicated until the fuel pressure reaches balance, the filter loses the filtering function in the process, dirt can directly enter a fuel pump or a mechanical hydraulic device system from the safety valve, and the service life of equipment is influenced. The existing hydraulic filter has no corresponding prediction alarm device before the safety valve is opened, so that the service condition of the hydraulic filter cannot be well monitored, and the service life of equipment is influenced to a certain extent.

Disclosure of Invention

The utility model provides a technical problem provide a simple structure, reasonable in design and application safety factor is high hydraulic filter.

The utility model discloses a solve above-mentioned technical problem and adopt following technical scheme: a hydraulic filter is characterized by comprising an upper shell and a lower shell which are sealed and buckled up and down, a filter element is installed in the lower shell, a liquid inlet and a liquid outlet which are communicated with each other through a bypass valve are arranged in the upper shell, the liquid inlet is communicated with a cavity on the outer side of the filter element, the liquid outlet is communicated with a cavity on the inner side of the filter element, a safety valve is arranged on the bypass valve, a signaler is arranged on the upper part of the upper shell, a piston assembly and a spring are sequentially installed in a cavity on one side of the signaler shell, the tail end of the spring is pressed and sealed through a pressing piece, magnetic steel is arranged at the end part of the piston assembly, connecting channels which are communicated with the cavities on the two sides of the piston assembly and the liquid inlet and the liquid outlet are respectively arranged on the signaler shell on the two sides of the piston assembly, the end cover is fixed with a socket component connected with the micro switch.

Preferably, an annular groove is formed in the inner side of the buckling end of the upper shell, and a sealing ring for sealing the upper shell and the lower shell are arranged in the annular groove.

Preferably, a stepped hole is formed in the end of the cavity on one side of the annunciator shell, and after the combined sealing washer is mounted in the stepped hole, the spring is tightly pressed through the pressing piece and the cavity on the side is tightly pressed and sealed.

Preferably, a plurality of annular sealing grooves are formed in the outer side of the piston assembly in the axial direction, and annular sealing rings are installed in the annular sealing grooves.

Preferably, the tail part of the piston assembly is provided with a process hole for installing and detaching the piston assembly in the cavity.

Preferably, the filter core is fixed in the inferior valve internally through filter core joint spare and mounting, and this filter core joint spare middle part cover is located on the oil road mouth of last casing bottom, and the upper portion of filter core joint spare is equipped with the annular seal groove relative with the oil road mouth, is equipped with ring packing in this annular seal groove, and the bottom of filter core joint spare is equipped with the bayonet socket that is used for the fixed filter core of joint, and the installation mounting compresses tightly behind the filter core joint spare and compresses tightly through last casing and be fixed in down on the tapering stopping step on casing upper portion.

Compared with the prior art, the utility model following beneficial effect has: the utility model has the advantages of the reliability is high, long service life, control quality is good, be suitable for flow pressure differential wide range, has effectively prolonged the operating cycle of fuel pump or mechanical hydraulic means system.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a side view of FIG. 1;

fig. 3 is a schematic view of the internal structure of the present invention;

fig. 4 is a schematic diagram of the internal structure of the annunciator of the present invention.

In the figure: 1-upper shell, 2-lower shell, 3-filter element, 4-bypass valve, 5-liquid inlet, 6-liquid outlet, 7-safety valve, 8-annunciator, 9-annunciator shell, 10-piston component, 11-spring, 12-pressing component, 13-magnetic steel, 14-microswitch, 15-end cover, 16-socket component, 17-sealing ring, 18-sealing ring, 19-combined sealing washer, 20-filter element clamping component and 21-installation fixing component.

Detailed Description

The technical scheme of the utility model is described in detail with the attached drawings, a hydraulic filter comprises an upper shell 1 and a lower shell 2 which are sealed and fastened up and down, a filter element 3 is installed in the lower shell 2, a liquid inlet 5 and a liquid outlet 6 which are communicated with each other through a bypass valve 4 are arranged in the upper shell 1, the liquid inlet 5 is communicated with the cavity outside the filter element 3, the liquid outlet 6 is communicated with the cavity inside the filter element 3, a safety valve 7 is arranged on the bypass valve 4, an annunciator 8 is arranged on the upper part of the upper shell 1, a piston assembly 10 and a spring 11 are sequentially arranged in one side cavity of the annunciator shell 9, the tail end of the spring 11 is tightly pressed and sealed through a pressing piece 12, a magnetic steel 13 is arranged at the end part of the piston assembly 10, connecting channels which are respectively arranged on the annunciator shells 9 at both sides of the piston assembly 10 and are communicated with, the front part of the microswitch 14 is provided with an iron sheet which is attracted with the magnetic steel 13, the outer side of the microswitch 14 is provided with an end cover 15 which is connected with the annunciator shell 9, and the end cover 15 is fixed with a socket component 16 which is connected with the microswitch 14.

The inner side of the buckling end of the upper shell 1 of the utility model is provided with an annular groove, and a sealing ring 17 and a sealing ring 18 which are used for realizing the sealing of the upper shell 1 and the lower shell 2 are arranged in the annular groove; a step hole is formed in the end part of the cavity at one side of the annunciator shell 9, and after the combined sealing washer 19 is installed in the step hole, the pressing piece 12 is used for propping against the spring 11 and tightly pressing and sealing the cavity at the side; a plurality of annular sealing grooves are formed in the outer side of the piston assembly 10 along the axial direction, and annular sealing rings are installed in the annular sealing grooves; the tail part of the piston assembly 10 is provided with a process hole for installing and disassembling the piston assembly 10 in the cavity; in filter core 3 is fixed in casing 2 down through filter core joint spare 20 and installation mounting 21, this filter core joint spare 20 middle part cover is located on the oil road mouth of 1 bottom of last casing, the upper portion of filter core joint spare 20 is equipped with the ring seal groove relative with the oil road mouth, be equipped with ring seal in this ring seal groove, the bottom of filter core joint spare 20 is equipped with the bayonet socket that is used for the fixed filter core 3 of joint, installation mounting 21 compresses tightly behind the filter core joint spare 20 and compresses tightly through last casing 1 and is fixed in on the tapering stopping step on 2 upper portions of casing down.

The utility model discloses in the use, hydraulic filter is after using a period, the filter effect variation of filter core, lead to the increase of the interior external differential pressure of filter core, can make the piston assembly pressurized in the annunciator take place lateral displacement this moment, and the magnet steel that drives its tip is skew, and then lead to the magnet steel to descend the suction force of the anterior iron sheet of micro-gap switch, make micro-gap switch on and transmit signal emergence warning, still do not carry out under the condition that the filter core was changed taking place to report to the police, can make safety valve overcome the spring elastic force effect, and then make the bypass valve open, make the inside and outside both sides of filter core intercommunication reach the balance until fuel pressure, avoid leading to fuel pump or mechanical hydraulic means abnormal operation and damage.

The foregoing shows and describes the general principles of the present invention, with its principal features and advantages, and further, various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A hydraulic filter is characterized by comprising an upper shell and a lower shell which are sealed and buckled up and down, a filter element is installed in the lower shell, a liquid inlet and a liquid outlet which are communicated with each other through a bypass valve are arranged in the upper shell, the liquid inlet is communicated with a cavity on the outer side of the filter element, the liquid outlet is communicated with a cavity on the inner side of the filter element, a safety valve is arranged on the bypass valve, a signaler is arranged on the upper part of the upper shell, a piston assembly and a spring are sequentially installed in a cavity on one side of the signaler shell, the tail end of the spring is pressed and sealed through a pressing piece, magnetic steel is arranged at the end part of the piston assembly, connecting channels which are communicated with the cavities on the two sides of the piston assembly and the liquid inlet and the liquid outlet are respectively arranged on the signaler shell on the two sides of the piston assembly, the end cover is fixed with a socket component connected with the micro switch.

2. The hydraulic filter of claim 1, wherein: an annular groove is formed in the inner side of the buckling end of the upper shell, and a sealing ring for sealing the upper shell and the lower shell are arranged in the annular groove.

3. The hydraulic filter of claim 1, wherein: and a step hole is formed in the end part of the cavity at one side of the annunciator shell, and after a combined sealing washer is installed in the step hole, the spring is tightly propped through a pressing piece and the cavity at the side is tightly pressed and sealed.

4. The hydraulic filter of claim 1, wherein: the outer side of the piston assembly is axially provided with a plurality of annular sealing grooves, and annular sealing rings are arranged in the annular sealing grooves.

5. The hydraulic filter of claim 1, wherein: the tail part of the piston assembly is provided with a process hole for installing and disassembling the piston assembly in the cavity.

6. The hydraulic filter of claim 1, wherein: the filter core is fixed in the inferior valve internally through filter core joint spare and installation mounting, and this filter core joint spare middle part cover is located on the oil road mouth of last casing bottom, and the upper portion of filter core joint spare is equipped with the ring seal groove relative with the oil road mouth, is equipped with ring seal in this ring seal groove, and the bottom of filter core joint spare is equipped with the bayonet socket that is used for the fixed filter core of joint, and the installation mounting compresses tightly behind the filter core joint spare through last casing compress tightly be fixed in down on the tapering stopping step on casing upper portion.