CN2646688Y

CN2646688Y - Hydraulic test bench for storage battery forklift truck

Info

Publication number: CN2646688Y
Application number: CN 02277925
Authority: CN
Inventors: 李翔; 欧阳剑飞; 郭涛; 龙怡
Original assignee: CHANGSHA NORTH STATION TECHNOLOGY DEVELOPMENT SERVICE DEPARTMENT
Current assignee: CHANGSHA NORTH STATION TECHNOLOGY DEVELOPMENT SERVICE DEPARTMENT
Priority date: 2002-12-20
Filing date: 2002-12-20
Publication date: 2004-10-06
Anticipated expiration: 2012-12-20

Abstract

The utility model relates to an accumulator fork lift hydraulic testing platform, which consists of a pump hydraulic testing circuit and a multi route selector valve hydraulic testing circuit; wherein the pump hydraulic testing circuit is formed by connecting a motor, a tested pump, an unilateral valve, a flooding valve, a throttle, a flowmeter, a pressure gauge, a pressure gauge switch, an oil pool and a fuel filter one by one through a hydraulic pipe; and the multi route selector valve hydraulic testing circuit is formed by connecting a motor, a motor pump, a multi route diverting valve, two overflowing valves, two throttles, an unilateral valve, a closing valve, two pressure gauge, a pressure gauge switch, a graduate, an oil pool and a fuel filter one by one through a hydraulic pipe. The utility model adopts an overflowing valve, a throttle to limit flow, press pressure and load, stimulates an accumulator fork lift hydraulic system realistic working position, tests the pumps and the multi route diverting valve and then judges the failure reasons and whether the pumps and the multi route diverting valve are adequate or not. The utility model has advantages that: the utility model provides a precise basis to overhaul, so as to save working hour, fittings and raw material, enhance efficiency, lower charge and reduce labor intensity.

Description

The storage battery forktruck hydraulic test bed

Technical field:

The pump and the multi-way reversing valve detection device of storage battery forktruck maintenance proving installation, particularly storage battery forktruck.

Background technology:

Pump and multiple directional control valve are important components in the hydraulic system of storage battery forktruck structure, and in the accumulator stream fork truck operation troubles, the failure rate of pump and reversal valve is quite high, is the most important thing that the storage battery forktruck hydraulic system detects, keeps in repair, maintains.The fault of pump and reversal valve often causes leakage of oil, oil pressure deficiency, door frame descends voluntarily and tilt, so that produces fork truck lifting weight and do not reach specified and the goods that hoists descends voluntarily, has a strong impact on to produce and jeopardize safety.

Because prior art lacks pump and reversal valve hydraulic test device, often judge pump and reversal valve complex structure, dismounting inconvenience in addition during maintenance by rule of thumb, when breaking down maintenance, the trouble spot is difficult for accurately judging, often causes the part replacement mistake, repeatedly do over again and cause, both waste materials, the increase expense is incured loss through delay the duration again, influence is produced, cause than the large economy loss, and service work labour intensity is big, the workman can't bear its hardship.

Summary of the invention:

The purpose of this utility model is to design a kind of pump and multiple directional control valve proving installation of storage battery forktruck hydraulic system, adopts throttling valve, and surplus valve is regulated Control Flow, pressure, loads to reach actual condition, and pump and reversal valve are carried out simulation test.

Technical solution of the present utility model is the storage battery forktruck hydraulic test bed, is connected through conduit under fluid pressure by motor, tested pump, retaining valve, surplus valve, throttling valve, flowmeter, tensimeter, pressure meter switch, oil sump, oil filter and forms pump hydraulic test loop; By motor, power pump, multiple directional control valve, 2 surplus valves, 2 throttling valve, retaining valve, stop valve, 2 tensimeters, 2 pressure meter switches and measuring cup, oil sump, oil filter connect channeling reversal valve hydraulic test loop through conduit under fluid pressure.

Description of drawings:

Fig. 1 is a storage battery forktruck oil pump hydraulic test loop structure synoptic diagram

Fig. 2 is a storage battery forktruck multiple directional control valve hydraulic test loop structure synoptic diagram

Embodiment:

The utility model further specifies as follows in conjunction with specific embodiments referring to accompanying drawing:

The storage battery forktruck hydraulic test bed is by pump hydraulic test loop and multiple directional control valve hydraulic test loop are installed on the test platform.

Pump hydraulic test loop is to connect tested pump [2] by motor [1], tested pump [2] input end connects oil sump [9] through oil filter [10], pump [2] output terminal connects the parallel branch of surplus valve [6] and throttling valve [7] through retaining valve [3], return oil sump [9] through flowmeter [8] again, tensimeter [5] connects end altogether through what pressure meter switch [4] was connected to surplus valve [6], throttling valve [7], retaining valve [3].

Multiple directional control valve hydraulic test loop is to be connected into the loop of exerting pressure by two throttling valve [12], [18] and surplus valve [19], stop valve [22] with tested multiple directional control valve [21]; Motor [1] connects power pump [2], and power pump [2] input end connects oil sump [9] through oil filter [10], and power pump [2] output terminal divides three branch roads; One branch road is connected to oil sump [9] and throttling valve [12], the surplus valve [19] in the loop of exerting pressure, the common contact of tested multiple directional control valve [21] through surplus valve [11]; Two branch roads are connected to tensimeter [14] through pressure switch [13]; Three branch roads are connected to two throttling valve [12] in the loop of exerting pressure, the serial connection point between [18] through retaining valve [15], and this contact connects tensimeter [16] respectively and is connected to measuring cup [23] through stop valve [22].

The utility model principle of work is;

One, oil pump test:

(1) pressure test:

1, surplus valve [6] adjusting pressuring handle is placed nothing press the position, open pressure meter switch [4], close throttling valve [7].

2, actuating motor [1] is regulated surplus valve [6] handle, and pressure fuel pump can be done lifting between the 0-11MPa with the adjusting of surplus valve, and no ear-piercing noise then is qualified.

(2) flow test:

Oil pump [2] pressure is raised to working pressure, reads 1 minute flow of flowmeter, and note down.Open throttling valve [7], read [8] 1 minutes flow of flowmeter, and do the meter record.Preceding paragraph meter record numerical value is removed consequent meter record numerical value, the i.e. volumetric efficiency of oil pump [2].

Two, multi-way reversing test:

(1) pressure regulation test

1, close throttling valve [12], [18], stop valve [22], actuating motor [1] is regulated surplus valve [11], and the pressure that makes tensimeter [14] is 10.5MPa.

2, open throttling valve [18], make banked direction control valves [21] enter system.Operation banked direction control valves [21] handle, the surplus valve [19] of adjusting banked direction control valves [21], the pressure of tensimeter [16] then is qualified with the handle lifting.

(2) Leak Off Test (LOT)

1, close stop valve [23], throttling valve [12], [18], actuating motor [1] is regulated surplus valve [11], and the pressure that makes tensimeter [14] is 10.5MPa.

2, open throttling valve [18], operation banked direction control valves [21] handle is regulated surplus valve [19], and the pressure that makes tensimeter [16] is 10MPa.

3, valve [21] the loop handle that will test of operation makes pressure rise to 10MPa, and oil pump [2] stops, observe 1 minute the internal pressure table [16] drop-out value and make meter and record.Handle resets.

4, actuating motor [1] cuts out throttling valve [18] and makes pressure rise to 10MPa, and oil pump [2] stops.Measuring cup [23] is placed under stop valve [22] oil-out, and crack stop valve [22] is observed tensimeter [16], reduces to the 3rd clause when descending last record value when the force value of tensimeter [16], closes stop valve [22], and the oil mass of measuring cup [23] is the pond leakage quantity value of valve.

The utility model has the advantages that the employing surplus valve, the loading of exerting pressure of throttling valve current limliting, imitated storage battery hydraulic system actual condition, test pump and multiple directional control valve are judged its whether qualified and failure cause, for maintenance provides accurate foundation, thereby save man-hour, accessory and starting material are raised the efficiency, the reduction expense, and reduce labour intensity.

Claims

1, a kind of storage battery forktruck hydraulic test bed, constitute by installation pump hydraulic test loop and multiple directional control valve hydraulic test loop on the test platform, it is characterized in that: connect through conduit under fluid pressure by motor, tested pump, retaining valve, surplus valve, throttling valve, flowmeter, tensimeter, pressure meter switch, oil sump, oil filter and form pump hydraulic test loop; By motor, power pump, multiple directional control valve, 2 surplus valves, 2 throttling valve, retaining valve, stop valve, 2 tensimeters, pressure meter switch and measuring cups, oil sump, oil filter connect channeling reversal valve hydraulic test loop through conduit under fluid pressure.

2, storage battery forktruck hydraulic test bed according to claim 1, it is characterized in that its pump hydraulic test loop is to connect tested pump by motor, tested pump input end connects oil sump through oil filter, pump output terminal connects the parallel branch of surplus valve and throttling valve through retaining valve, return oil sump through flowmeter again, tensimeter connects end altogether through what pressure meter switch was connected to surplus valve, throttling valve, retaining valve.

3, accumulator fork power hydraulic test bed according to claim 1, it is characterized in that its multiple directional control valve hydraulic test loop be by two throttling valve, and surplus valve, stop valve and tested multiple directional control valve be connected into the loop of exerting pressure, tested multiple directional control valve itself has retaining valve; Motor connects power pump, and the power pump input end connects oil sump through oil filter, and the power pump output terminal divides three branch roads; One branch road is connected to oil sump and throttling valve, the surplus valve in the loop of exerting pressure, the common contact of tested multiple directional control valve through surplus valve; Two branch roads are connected to tensimeter through pressure switch; Three branch roads through retaining valve be connected to the loop of exerting pressure two throttling valve, between the serial connection point, this contact connects tensimeter respectively and is connected to measuring cup through stop valve.

4, accumulator fork power hydraulic test bed according to claim 1 is characterized in that the motor in its pump testing hydraulic loop and the banked direction control valves hydraulic test loop is an AC motor.

5, accumulator fork power hydraulic test bench according to claim 1 is characterized in that in its multiple directional control valve hydraulic test loop, is connected to an accumulator at two throttling valve serial connection point.

6, accumulator fork power hydraulic test bed according to claim 1 is characterized in that tensimeter and flowmeter that its pump and multiple directional control valve hydraulic test are slept are direct reading tensimeter and quantity quantifier.