CN2169468Y - Precision hydraulic filter - Google Patents

Abstract

The utility model discloses a precision hydraulic filter. A contamination indicator is composed of a mechanical signal component, a balancing spring, a sliding valve with a rod, the magnetic steel, a reed pipe and a plug socket. A shell body is composed of an upper shell body and a lower shell body. A filtering core is installed in the lower shell body. A pollution discharge hole is arranged on the bottom of the lower shell body. The contamination indicator is installed on a top face. A safety valve is installed on a coaxial line between the inner part of the upper shell body and a liquid inlet and a liquid outlet. Two liquid through holes are arranged on the upper shell body on both ends of the safety valve. The two liquid through holes are respectively communicated with a front liquid cavity and a back liquid cavity of the sliding valve. The filth causes the hydraulic pressure difference at the liquid inlet and the liquid outlet. The sliding valve rod is pushed to move. The mechanical signal and the electric signal are reached to alarm simultaneously. The safety valve can automatically supplement the liquid to a work system. The utility model has the advantages of simple structure, and reliable work.

Description

Precision hydraulic filter

The utility model relates to a kind of improved liquid filter, and particularly a kind of safety valve is placed imported and exported on the same axis and the precise hydraulic filter with two kinds of alarm signals, is applicable in the system and device that requires the feed flow cleaning.

In the prior art, a kind of " accurate filter " of China's Chengdu Water-Softening Equipment Factory (CN8822555.2) its structure has base plate, butterfly shell head, support, two drain pipes, intake pipe, outlet pipe, outlet pipe, two pressure gauge connections, stiffening plate, dunnage, lifting hanger, band pin screw rods and tightens up the nut that band is sold screw rod, the card that links to each other with inwall is arranged in the housing, have the dozens of hole on the card, cartridge filter is arranged in the hole, spring is equipped with at its top, the blind flange that links to each other with flange is withstood in the spring upper end, and flange is connected with case top.This kind structure connecting link is many, and more complicated is observed the filtration state with pressure gauge, and inconvenience is arranged.In addition, New Technology Development Inst., Wenzhou has a kind of " hydraulic filter " (CN88202565.1), it is the hydraulic system filter, has the different apertures of multilayer filter screen filter cartridge construction, between inner core and the outer core space is arranged, guarantee the discharge value requirement, be installed in oil suction, return line and pipe joint are on pipeline filters.This kind hydraulic filter is feasible with putting, and is just more single, completely is difficult in time keep feed flow during dirt at the cup-strainer core collection, and alert capability when it's too late.Moreover, on the general filter that uses, have safety valve is installed on the filter core, when safety valve is opened, be detained dirt and then easily flow in the work system like this with bypass liquid road.On the import and export side position that safety valve is installed in filter that also has, this will make the original device volume strengthen, and the above alarm signal has only the mechanical signal of function singleness or electrical signal is only arranged.

The purpose of this utility model is to avoid above-mentioned prior art deficiency, and a kind of precise hydraulic filter is provided, and utilizes the import and export fluid pressure differential in time to carry out machinery, electrical signal and reports to the police simultaneously, also can carry out single signal alarm.

Task of the present utility model is finished as follows: the precise hydraulic filter, it is by upper shell, lower shell body is formed this housing, alpha contamination indicator is by the mechanical signal part, balance spring, band bar guiding valve, the magnet steel tongue, reed pipe, connector assembly is formed, cup-shaped filter core is housed in the lower shell body, and utilize the upper end to end button to be fixed on the upper shell bottom, pollutant exhaust hole is arranged at lower shell body bottom, and the logical fluid passage of annular is arranged between the filter core, on the same axis between importing and exporting in the upper shell one-way relief valves is housed on every side, at the one-way relief valves two ends, be that upper shell advances, outlet sap cavity place has two liquid-through holes, and slide valve lever front and back two sap cavities in the alpha contamination indicator that is installed in the upper shell top are connected in this hole, and the band bar guiding valve that the pressure reduction that utilization is imported and exported promotes in the alpha contamination indicator moves, finish dual warning task simultaneously, also can carry out the machinery of function singleness on demand and report to the police or the electrical signal warning.During work, liquid is gone into the logical fluid passage of annular from import,, flow to the work system from liquid outlet to upper shell through cup-shaped filter core, and the front and back sap cavity in the band bar guiding valve in the alpha contamination indicator is in state of equilibrium this moment, there is no alarm signal and sends.When collection is expired dirt around the filter core, liquid is difficult to pass through filter core, cause imported hydraulic to raise, sap cavity before liquid-through hole is sent to the alpha contamination indicator band bar guiding valve, under higher hydraulic pressure, promote to move after band bar guiding valve overcomes back cavity hydraulic pressure and spring force, by magnet steel collision machine signal, reporting to the police makes make contact in the reed pipe of top simultaneously, sends electrical signal and reports to the police.Can change, wash filter core after the alarm signal or shut down from lower shell body bottom blow-down hole pump drainage dirt, make system recovery normal then.If for some reason for the moment can not the pump drainage dirt or change the contaminate filter core, imported hydraulic be then opened one-way relief valves automatically increasing to some extent again through behind the certain hour, continues directly to the work system feed flow.

The utility model has the advantages that: because safety valve is installed on the middle coaxial line of liquid entrance, avoided when safety valve is opened, leach dirt in the lower shell body and enter work system through safety valve with import liquid, can be because of the volume that safety valve increases filtration is not set yet, and be convenient to signal and lead to central control desk, carry out remote-controlled operation.The utility model is compared with the filter of same equivalent life, precision, flow, pressure, has that volume is little, in light weight, the Placement of safe ready, import and export can be with requiring and fixed.After certain hour is sent in dual warning simultaneously, can open the safety-valve automatically and infuse, to prevent to lack the destruction plant issue that liquid produces to work system.And alpha contamination indicator is simple in structure, reliable operation.

Be described in further detail below in conjunction with accompanying drawing.

Fig. 1 overall structure sectional drawing of the present utility model.

Referring to shown in Figure 1, precise hydraulic filter with works fine performance, wherein by mechanical signal part (1), magnet steel (2), reed pipe (3), balance spring (4) in the sap cavity of band bar guiding valve (5) back, connector assembly (6) is formed alpha contamination indicator, form this housing by upper shell (9) and lower shell body (12), alpha contamination indicator is installed on upper shell (9) top, and upper shell (9) is provided with import liquid-through hole (7), with outlet liquid-through hole (8), it is switched to preceding sap cavity of band bar guiding valve (5) and back sap cavity, in the middle of the axis of hydraulic inlet (10) and outlet (16) one-way relief valves (17) is housed.Be installed in the lower shell body (12) cup-shaped filter core (14) on every side and have the logical fluid passage (13) of annular between the lower shell body (12), its upper end is fixed on below the upper shell (9) by ending button, pollutant exhaust hole (15) is arranged at lower shell body (12) bottom simultaneously, is contained in the system by precise hydraulic filter mounting hole (11).Its working method is: the liquid that has pressure extremely exports (16) from the logical fluid passage (13) of import (10) inflow annular in work system through cup-shaped filter core (14).If going up, filter core (14) collects when expiring dirt; then the import fluid pressure increases; one liquid is arranged before the band bar guiding valve of liquid-through hole (7) in the alpha contamination indicator in the sap cavity after greater than the outlet pressure certain value; force guiding valve overcome spring (4) power backward sap cavity move; magnet steel on slide valve lever (3) collision machine signal spare (1) is released and is hit the bell warning; make contact in the while reed pipe (3); the electrical signal warning of flashing the redlight; can shut down from pollutant exhaust hole (15) pump drainage this moment and remove dirt; also replaceable washing filter core (14); if in the time of can not in time carrying out blowdown for some reason or change washing filter core (14); fluid pressure will continue to raise; open the safety-valve immediately (17), feed flow will directly pass through safety valve by the feed flow import of upper shell, go in exporting to work system.After to the last removing the dirt in the liquid, make work recover normal, liquid is then cleanly worked.The utility model filter precision reaches 1～40 μ m, flow 60-660(L/min) to pollute indication warning pressure reduction be 0.5 ± 0.05Mpa.It is 0.6 ± 0.006MPa that safety valve is opened pressure reduction, and each operation parameter can be selected for use on request.

Claims (2)

1, a kind of precise hydraulic filter comprises alpha contamination indicator, housing, and filter core, the safety valve component is characterized in that:

This housing that a, housing are made up of upper shell and lower casing body, cup-shaped filter core is housed in the lower shell body, the upper end is fixed on the upper shell bottom, pollutant exhaust hole is arranged at lower shell body bottom, and the logical fluid passage of annular is arranged between the filter core, between the liquid inlet and outlet one-way relief valves is housed in the upper shell on every side, alpha contamination indicator is equipped with at the top, be positioned on the upper shell at safety valve two ends and have two liquid-through holes, connect sap cavity before and after the slide valve lever in the alpha contamination indicator respectively

B, alpha contamination indicator are by the mechanical signal part, balance spring, and band bar guiding valve, the magnetic guiding principle, reed pipe, connector assembly is formed.

2, precise hydraulic filter according to claim 1, it is characterized in that: safety valve is contained on the coaxial line of liquid in-out mouth.

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