CN201269845Y

CN201269845Y - Hydraulic flexible tube test machine

Info

Publication number: CN201269845Y
Application number: CNU2008202122179U
Authority: CN
Inventors: 宋军鑫
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2008-09-24
Filing date: 2008-09-24
Publication date: 2009-07-08
Anticipated expiration: 2018-09-24

Abstract

The utility model discloses a hydraulic hose testing machine which comprises a hose to be tested and also a stand, a hydraulic cylinder fixedly arranged on the stand, a drive device which is fixedly arranged on the stand and supplies power for the hydraulic cylinder, a first pipeline connecting the hydraulic cylinder and the hose to be tested and a second pipeline connected with the other end of the hose to be tested; and the other side of the second pipeline is also connected with an air exhaust valve. The hydraulic hose testing machine has simple structure, low cost and strong operability.

Description

The hydraulic hose testing machine

[technical field]

The utility model relates to a kind of hydraulic hose testing machine, relates in particular to a kind of hydraulic hose impulse testing machine.

[background technology]

Hydraulic hose is as a kind of parts commonly used that transmit hydraulic pressure, because of it has the flexible preferably every field that is widely used in life and produces, but hydraulic hose is under the effect of frequent alternate load, be easy to occur fatigue breakdown, gently then cause device damage, can not normally use, heavy then serious consequence such as cause casualties, so the fatigue breakdown performance test of hydraulic hose is an extremely important step of quality control in the hydraulic hose production, for the endurance damage capability of testing hydraulic flexible pipe better, be badly in need of a kind of hydraulic hose impulse testing machine.Existing pulse testing platform has had a variety of, though control accuracy is higher, has complex structure, shortcomings such as equipment cost and experimentation cost height, thus restricted popularization to a certain extent, do not find broad application.

[utility model content]

The technical matters that the utility model solves is for providing a kind of simple in structure, hydraulic hose testing machine that cost is low.

In order to address the above problem, the technical solution adopted in the utility model is:

A kind of hydraulic hose testing machine, comprise the test flexible pipe, wherein, also comprise stand, be fixedly arranged on hydraulic cylinder on the stand, be fixedly arranged on the stand for described hydraulic cylinder provide power drive unit, connect first pipeline of described hydraulic cylinder and described test flexible pipe and second pipeline that links to each other with the test flexible pipe other end, the described second pipeline opposite side also is connected with vent valve.

After adopting such structure, when providing power when the drive unit driving and for hydraulic cylinder, hydraulic cylinder produces impulse source, and be delivered to the test flexible pipe by first pipeline, test flexible pipe and sensed high pressure this moment, be in high pressure conditions, when drive unit returns, hydraulic cylinder does not then have pressure to the test flexible pipe, so the test flexible pipe is in low-pressure state at this moment, thereby realized a recurrence interval,, thereby realized the pulse testing of hydraulic hose by the to-and-fro movement of drive unit, the utility model has been finished the pulse testing of hydraulic hose equally under situation simple in structure like this, thereby greatly reduce cost, simultaneously because the operator can be easy to learn its using method, so but its generalization height.

[description of drawings]

Fig. 1 is the total synoptic diagram of the utility model preferred embodiment;

Fig. 2 is the structural representation of hydraulic cylinder among Fig. 1;

[embodiment]

In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.

A kind of hydraulic hose testing machine that the utility model preferred embodiment provides, comprise test flexible pipe 8, wherein, also comprise stand 11, be fixedly arranged on hydraulic cylinder 2 on the stand 11, be fixedly arranged on the stand 11 for described hydraulic cylinder 2 provide power drive unit 1, connect first pipeline 5 of described hydraulic cylinder 2 and described test flexible pipe 8 and second pipeline 9 that links to each other with test flexible pipe 8 other ends, described second pipeline, 9 opposite sides also are connected with vent valve 10.Like this, when providing power when drive unit 1 driving and for hydraulic cylinder 2, hydraulic cylinder 2 produces pulse, and is delivered to test flexible pipe 8 by first pipeline 5, and test flexible pipe 8 and sensed high pressure this moment, be in high pressure conditions, when drive unit 1 returned, 2 of hydraulic cylinders did not have pressure to test flexible pipe 8, so test flexible pipe 8 is in low-pressure state at this moment, by the to-and-fro movement of drive unit 1, thereby realized the pulse testing of hydraulic hose 8.

Described hydraulic cylinder 2 comprises the cylinder body with a cavity 27 21, push rod 23, oil accumulator 25, fluid hole 26 and the stop means 24 that is fixed on the stand 11.Described cylinder body 21 is fixed on the stand 11 by mounting hole 211, described push rod 23 comprises push rod cup 233 and the pusher arms 234 that is wholely set, described push rod cup 233 is slidably disposed in the cavity 27 of described cylinder body, described push rod cup 233 ends also are provided with piston ring 232, described piston ring 232 is divided into high pressure chest 271 and low-pressure cavity 272 with described cavity 27, described pusher arms 234 is stretched out described cylinder body 21, and receives the driving force of described drive unit 1; Described oil accumulator 25 links to each other with described cavity 27 with compensate opening 252 by fluid infusion hole 251, thereby make oil in the oil accumulator 25 and the oil in the cylinder body cavity 27 to flow mutually, under original state, described push rod cup 233 is between described fluid infusion hole 251 and compensate opening 252, the effect in described fluid infusion hole 251 is to give in the high pressure chest 271 to supply liquid under free state, the effect of described compensate opening 252 is to give high pressure chest 271 and low-pressure cavity 272 additive liqs in push rod 23 to-and-fro movement processes, prevents to cause motion to be obstructed because high pressure chest 271 and low-pressure cavity 272 form vacuum in push rod 23 to-and-fro movements; Be provided with back-moving spring 22 in the described high pressure chest 271, described back-moving spring 22 1 ends link to each other with described hydraulic cylinder cavity 27 bottoms, specifically are the bottoms of high pressure chest 271, and the other end links to each other with push rod cup 233.

For fear of the oil leakage phenomenon that occurs in the slit of piston ring 232 and cylinder body 21 when loading, piston ring is provided with first O-ring seal 231.

Also be provided with fluid hole 26 on the cylinder body 21 of described high pressure chest 271 correspondences, described fluid hole 26 links to each other with described first pipeline 5.

Also be provided with the stop means 24 of the described cavity of sealing at the opening part of described cavity 27, be provided with the hole of passing for push rod 244 in the described stop means 24, described stop means 24 comprises the spacing ring 241 that is fixed on the cylinder body 21, locate the jump ring 243 of described spacing ring and be arranged on spacing ring 241 and pusher arms 234 between second O-ring seal 242, the sliding scale of described spacing ring 241 restriction push rods 23, thereby specifically be to realize the slip of restriction push rod 23 by blocking push rod cup 233, described spacing ring 241 is provided with through hole, described through hole can pass freely through for pusher arms 234, the center of circle of described through hole preferably is arranged on the axis of push rod 23, space between described second O-ring seal, 242 sealing pusher arms 234 and the spacing ring 241, thus prevent that fluid from passing through.

Described drive unit 1 can be those skilled in the art's power source commonly used, such as cylinder, in the present embodiment, adopt the single pole single-acting to drive cylinder, the cylinder block of described driving cylinder is fixed on the stand 11, its cylinder piston rod then with pusher arms 234 effect of hydraulic cylinder 2, for described push rod 23 provides extruding power, concrete, the initial position relative fixed of the piston rod of described driving cylinder and described pusher arms, and between be provided with the gap, can guarantee like this can be abundant when push rod resets, thereby avoid the flexible pipe release thorough inadequately.

Described first pipeline 5 is provided with

tensimeter

4,4 pairs of line pressures of described tensimeter are measured, thereby concrete force value that can clear and definite pipeline, because tensimeter 4 is measured easy build-up of pressure table 4 to line pressure in entire test damage, so in the middle of the tensimeter 4 and first pipeline 5, be provided with stop valve 3, by the break-make of stop valve 3 pilot piping, thus the switch situation of coming controlled pressure table 4.

Between described first pipeline 5 and second pipeline 9, can be arranged in parallel a plurality of test flexible pipes 8 simultaneously, in the present embodiment, as shown in Figure 1, work simultaneously from having used three test flexible pipes 8, thereby increase work efficiency.

For the test flexible pipe 8 under each temperature is tested, set up an environment temperature case 7, described test flexible pipe 8 is arranged in the environment temperature case 7, temperature in described environment temperature case 7 guard boxs remains in certain numerical value, specifically, when needs carried out 80 ° test, the temperature of environment temperature case 7 was set to 80 ° at this moment, when needs carried out 100 ° test, the temperature of environment temperature case 7 was set to 100 ° at this moment.

For the liquid that prevents to test in the flexible pipe 8 is given liquid in the hydraulic cylinder 2 by first pipeline 5 with temperature transfer, thereby it is softening to make that O-ring seal in the hydraulic cylinder 2 causes because of the raising of temperature, thereby has lost the effect of sealing; Described first pipeline 5 is set to curved near environment temperature case 7 one ends, and curved pipeline 51 is being arranged in the refrigeratory 6, and the refrigeratory that described refrigeratory 6 can adopt those skilled in the art to use always is such as adopting water tank in the present embodiment.

Be provided with vent valve 10 in the end of described second pipeline 9, guarantee the whole test machine in the emptying of when work air, concrete mode is to occupy space in first pipeline 5 and second pipeline 9 by fluid, thereby reach the effect of exhaust, when the air in row's end conduit, then vent valve 10 is closed.

The course of work of the utility model preferred embodiment is: at first flexible pipe 8 to be measured is connected in the testing machine, and carry out bleeding, bleeding specifically comprises: allow drive unit 1 continuous working earlier, thereby the liquid in the hydraulic cylinder 2 is full of whole pipeline, and the gas in the pipeline is discharged by vent valve 10, close vent valve 10 then, thereby guaranteed not exist in the whole pipeline gas; Carry out the adjustment of drive unit 1 working condition then, open stop valve 3 this moment, determine the adjustment situation of drive unit 1 according to the value of tensimeter 4 demonstrations, if the pressure that tensimeter 4 shows is excessive, then should suitably reduce the frequency of operation and the amplitude of drive unit 1, if the pressure that tensimeter 4 shows is too small, then should suitably increase the frequency of operation and the amplitude of drive unit 1, through adjustment repeatedly, thereby determine the working condition of drive unit 1, after having determined the work range and frequency of drive unit 1, close stop valve 3, this moment, preliminary work was finished, piston rod in the drive unit 1 is to hydraulic cylinder 2 motions at this moment, when piston rod touches the pusher arms 234 of hydraulic cylinder 2 and drives pusher arms 234 extruding high pressure chests 271, described push rod cup 233 is crossed fluid infusion hole 251, the high pressure chest 271 and first pipeline 5 owing to hydraulic cylinder 2 this moment, refrigeratory 6, test flexible pipe 8 is isolated into the space of a sealing, when push rod cup 233 continues extruding, the pressure of fluid raises in the high pressure chest 271, on test flexible pipe 8, just applied a high-voltage pulse, when the piston rod that drives cylinder resets, this moment, back-moving spring 22 meetings reset push rod 23 at leisure, can from first O-ring seal 5 deformation gap with cylinder body cavity hole wall flow to high pressure chest 271 when compensation owing to piston ring 232 fast reset the in short-term decompression of high pressure chest 271 by the fluid that fluid infusion hole 251 and compensate opening 252 flow in the low-pressure cavity 272 this moment.At this moment, high pressure chest 271 is connected with oil accumulator 25 by fluid infusion hole 251, and test flexible pipe 8 is in low pressure.So just, test flexible pipe 8 is applied a recurrence interval.Like this, by constantly working repeatedly, thereby test the pulse testing of flexible pipe 8, add up the work number of times of drive unit simultaneously.

Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field; under the prerequisite that does not break away from the utility model design; can also make some simple deduction or replace, all should be considered as belonging to the scope of patent protection that the utility model is determined by claims of being submitted to.

Claims

1, a kind of hydraulic hose testing machine, comprise the test flexible pipe, it is characterized in that, also comprise stand, be fixedly arranged on hydraulic cylinder on the stand, be fixedly arranged on the stand for described hydraulic cylinder provide power drive unit, connect first pipeline of described hydraulic cylinder and described test flexible pipe and second pipeline that links to each other with the test flexible pipe other end, the described second pipeline opposite side also is connected with vent valve.

2, hydraulic hose testing machine as claimed in claim 1, it is characterized in that, described hydraulic cylinder comprises and is fixedly arranged on the cylinder body that has a cavity on the stand, slidably is arranged on push rod, the oil accumulator that links to each other with the cylinder body cavity, fluid hole that links to each other with first pipeline in the cylinder body cavity and the stop means that seals described cavity that described stop means is provided with the hole that the confession push rod passes.

3, hydraulic hose testing machine as claimed in claim 2 is characterized in that, described push rod comprises push rod cup and the pusher arms that is wholely set, and described push rod cup end also is provided with piston ring, and described piston ring is provided with first O-ring seal.

4, hydraulic hose testing machine as claimed in claim 3 is characterized in that, described stop means comprises the spacing ring that is fixed on the cylinder body, locate the jump ring of described spacing ring and be arranged on spacing ring and pusher arms between second O-ring seal.

5, hydraulic hose testing machine as claimed in claim 2 is characterized in that, described oil accumulator links to each other with the cylinder body cavity with compensate opening by the fluid infusion hole.

6, hydraulic hose testing machine as claimed in claim 2 is characterized in that, described hydraulic cylinder also comprises back-moving spring, and described back-moving spring one end links to each other with the cylinder body cavity bottom, the other end links to each other with push rod cup.

As each described hydraulic hose testing machine of claim 1 to 6, it is characterized in that 7, described first pipeline is provided with the tensimeter of test line pressure and protects described manometric stop valve.

8, as each described hydraulic hose testing machine of claim 1 to 6, it is characterized in that described hydraulic hose testing machine also comprises the environment temperature case, described test flexible pipe is arranged in the environment temperature case.

9, hydraulic hose testing machine as claimed in claim 8 is characterized in that, described first pipeline is set to curved near environment temperature case one end, and described curved pipeline is arranged in the refrigeratory.

10. hydraulic hose testing machine as claimed in claim 1 is characterized in that, has been arranged in parallel at least one test flexible pipe between described first pipeline and second pipeline.