CN205580885U - Pressure testing machine - Google Patents
Pressure testing machine Download PDFInfo
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- CN205580885U CN205580885U CN201620418645.1U CN201620418645U CN205580885U CN 205580885 U CN205580885 U CN 205580885U CN 201620418645 U CN201620418645 U CN 201620418645U CN 205580885 U CN205580885 U CN 205580885U
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Abstract
The utility model discloses a pressure testing machine, including the organism and with the hydraulic control case of the adjacent setting of organism, the bottom of organism is provided with the hydro -cylinder, the oil tank is drawn together to the hydraulic control case and bag, the oil pump be connected with the oil tank and with oil pump connection's hydraulic motor, the oil pump is connected with the oil tank through going out oil pipe, be provided with pilot operated compound relief valve on play oil pipe's the pipeline, pilot operated compound relief valve is connected with a magenetic exchange valve, a magenetic exchange valve's one of them position and oil tank intercommunication, still be provided with pressure relay on play oil pipe's the pipeline, a magenetic exchange valve's switching -over is controlled by pressure relay, the too big pressure release action of pressure is realized to the pressure that sets up pressure relay control pilot operated compound relief valve on the fluid pressure line, avoid the pressure test machine to reduce life under long -time high pressure, setting up the antiskid that circular arch played and reducing the machining precision of holding down plate on the holding down plate to the cushioning effect that spring washer that the combination set up on the top board played has improved the measuring accuracy.
Description
Technical field
This utility model relates to the test equipment of material property, particularly to a kind of pressure testing machine.
Background technology
Pressure testing machine is also referred to as electron pressure testing machine, it is mainly used in measuring the comprcssive strength of material, it is adaptable to the industry test chambers such as highway, bridge, building make the compressive strength test of concrete, cement products, hollow brick, refractory brick, engineering ceramics, building material, such as stone.
The hydraulic system that existing pressure testing machine generally uses is as dynamical system, the such as a kind of pressure testing machine disclosed in the patent that notification number is CN 204203001U, including a frame, the top of described frame connects a fixing upper jacking block, the bottom of described frame is provided with an oil cylinder, connect on described oil cylinder piston upward and have a lower jacking block, described oil cylinder is connected by oil pipe and an oil pump, described oil pump and a DC motor Driver connect, and described direct current generator and a variable-speed controller signal connect.During test, test block is placed on lower jacking block, start oil cylinder, jacking block under the piston driving of oil cylinder is made to increase, until test block is raised block and lower jacking block compresses, now oil cylinder continues upper top, until test block is crushed, read the various data during test block is compacted to crushing, complete test, by variable-speed controller, the speed controlling of motor is come the flow of control oil pump, the speed uplink reaching piston controls, but the upper pressure limit of different tonnage is all had due to different pressures testing machine, the pressure testing machine selecting different tonnage is needed to test for different test block materials, and when misplacing the test block being more than pressure testing machine maximum pressure value into comprcssive strength in test process, it is easy for causing pressure testing machine to there is high pressure conditions for a long time, reduce the service life of pressure testing machine.
Utility model content
The purpose of this utility model is to provide a kind of to be had decompression function and avoids being in for a long time the pressure testing machine of high pressure conditions.
Above-mentioned technical purpose of the present utility model has the technical scheme that a kind of pressure testing machine, including body and and the hydraulic cabinet that is disposed adjacent of body, the bottom of described body is provided with oil cylinder, described hydraulic cabinet includes fuel tank, the oil pump being connected with fuel tank and the hydraulic motor being connected with oil pump, described oil pump passes through flowline, oil return pipe is connected with fuel tank, it is provided with pilot operated compound relief valve on the pipeline of described flowline, described pilot operated compound relief valve connects the first solenoid directional control valve, described first solenoid directional control valve connects with fuel tank, it is additionally provided with pressure switch on the pipeline of described flowline, the commutation of described first solenoid directional control valve is controlled by pressure switch.
By using technique scheme, oil pump utilizes hydraulic motor to be transported on oil cylinder work by flowline by the hydraulic oil in fuel tank, flowline is provided with pressure switch, a force value preset by pressure switch, this force value is less than the maximum working pressure (MWP) of pressure testing machine, when force value set by the pressure overpressure relay of oil pump oil-out, pressure switch sends the signal of telecommunication and controls the first electromagnetic switch valve events commutation, pilot operated compound relief valve is connected with fuel tank, now pressure testing machine is in pressure release state, hydraulic oil cannot be transported in oil cylinder from flowline, pressure testing machine is avoided to be in maximum pressure state, improve the service life of pressure testing machine.
As preferably, described first solenoid directional control valve is bi-bit bi-pass solenoid directional control valve.
By using technique scheme, a bi-bit bi-pass solenoid directional control valve wherein working position is that another working position normally closed leads directly to, during normal work, guide's end of pilot operated compound relief valve connects with normally closed working position, now oil pump just can open pilot operated compound relief valve when having the force value that mouth pressure needs more than pilot operated compound relief valve setting；When guide's end connects with straight-through working position, now pilot-operated type overflow connects with fuel tank and is i.e. in communication with the outside, and pressure now is zero, it is achieved oil pump pressure release state.
As preferably, the flowline between described oil pump and oil cylinder is additionally provided with three position four-way electromagnetic valve, described hydraulic cabinet is provided with and controls the oil-feed switch of commutation and oil return switch about three position four-way electromagnetic valve.
By using technique scheme, control oil-feed switch and realize the break-make of two electromagnetic valves on three position four-way electromagnetic valve with oil return switch, carry out oil circuit control and realize the reciprocating motion of oil cylinder inner carrier.
As preferably, described body also includes underbeam, upper beam, it is arranged at above oil cylinder and top board that the lower platen fixing with the piston of described oil cylinder is relative with lower platen and be connected the elevating mechanism of top board, the surface of described lower platen is evenly equipped with some hemisphere juts.
By using technique scheme, test block is placed on lower platen, utilizes spherical protrusions to play anti-skidding position-limiting action, and original test block is contacted with the face of lower platen and be changed into multiple point cantact, decreases the requirement on machining accuracy to lower platen.
As preferably, described elevating mechanism includes the leading screw being threadedly connected to upper beam and is fixed on leading screw one end and for driving the handwheel of screw turns.
By using technique scheme, rotate handwheel and drive the rotation of leading screw to realize the oscilaltion of top board, thus realize altitude mixture control preliminary to top board, adapt to various sizes of test block.
As preferably, described elevating mechanism includes the leading screw being threadedly connected to upper beam and is fixed on the motor of upper beam, described motor is located in the transmission case being fixed on upper beam, described screw set is provided with worm gear and this worm gear is connected with threads of lead screw, the motor shaft of described motor connects has worm screw, described worm and wheel to be meshed.
By using technique scheme, utilize the rotation Timing Belt of motor to move screw turns and realize the oscilaltion of leading screw, it is achieved electric up-down effect, easy to operate and laborsaving.
As preferably, one end of described leading screw being additionally provided with installing plate, described top board is connected with installing plate, is wherein provided with elastomeric pad between top board and installing plate.
By using technique scheme, utilize when test block contacts with top board elastomeric pad to play a cushioning effect, it is to avoid due to the floating of pressure data when test block just contacts with top board, improve measuring accuracy.
In sum, this utility model has the advantages that
1, the pressure arranging pressure switch control pilot operated compound relief valve on fluid pressure line realizes the pressure release action that pressure is excessive, it is to avoid pressure testing machine reduces service life under long-time high pressure；
2, arrange that circular protrusions played anti-skidding on lower platen and reduce the machining accuracy of lower platen, and it is combined on top board the cushioning effect that the elastomeric pad arranged plays, improve measuring accuracy.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment one pressure testing machine；
Fig. 2 is the hydraulic circuit diagram of embodiment one pressure testing machine；
Fig. 3 is the schematic diagram that embodiment one top board is connected with leading screw；
Fig. 4 is the axonometric drawing of lower platen；
Fig. 5 is the structural representation of elevating mechanism in embodiment two.
In figure: 1, underbeam；2, column；21, handwheel；3, oil cylinder；4, piston；5, lower platen；51, hemisphere jut；6, top board；7, leading screw；71, installing plate；72, elastomeric pad；8, upper beam；9, motor；10, display screen；11, oil-feed switch；12, oil return switch；13, hydraulic motor；14, shaft coupling；15, fuel tank；16, oil pump；161, flowline；162, oil return pipe；17, the first solenoid directional control valve；18, pressure switch；19, pilot operated compound relief valve；20, the second solenoid directional control valve.
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model is described in further detail.
Embodiment one
Seeing Fig. 1, a kind of pressure testing machine, including body and the hydraulic control cabinet adjacent with body, body includes underbeam 1 and upper beam 8, is provided with four root posts 2 between upper beam 8 and underbeam 7, and upper beam 8 is fixed respectively by four root posts 2 with underbeam 7.
Being additionally provided with oil cylinder 3 on upper beam 8, include the piston 4 that can stretch up and down in oil cylinder 3, the oscilaltion being fixedly arranged above lower platen 5, i.e. piston 4 of piston 4 drives the oscilaltion process of lower platen 5；Upper beam 8 female thread is connected with leading screw 7, and the lower end of leading screw 7 is fixed with top board 6, top board 6 and lower platen 5 just to and both sizes identical.
Described upper beam 8 is provided with motor 9, motor 9 is arranged in transmission case, the threaded upper ends of screw mandrel 7 connects worm gear, worm gear set is located on leading screw 7, and the motor shaft of motor 9 connects worm screw, and this worm and wheel engages, the rotation of motor shaft drives worm screw to rotate, worm screw drives worm gear wheel, and worm gear is limited in transmission case and original place rotates so that leading screw 7 realizes oscilaltion process.
Described hydraulic control cabinet includes arranging the fuel tank 15 that it is internal, is provided with oil pump 16 in fuel tank 15, and being provided above being connected by shaft coupling 15 of oil pump 16 has hydraulic motor 14, is provided with oil inlet pipe and flowline between fuel tank 15 and oil cylinder 3；Hydraulic control cabinet is additionally provided with oil-feed switch 11, goes out oil circuit breaker 12 and display screen 10.
See Fig. 3, lower end at leading screw 7 fixedly mounts plate 71, fixed form can be screw or directly fix with welding manner, is provided with elastomeric pad 72 between installing plate 71 and top board 6, and installing plate 71, elastomeric pad 72 and top board 6 three are fastened to each other by screw.
Seeing Fig. 4, the upper surface of lower platen 5 is evenly equipped with multiple hemisphere jut 51, hemisphere jut 51 makes the test block put in the above play certain anti-skidding effect, and reduces the requirement to lower platen 5 flatness, reduces manufacturing cost.
See Fig. 2, hydraulic circuit in the present embodiment, oil pump 16 connects flowline 161, oil-out at oil pump 16 goes out to be provided with pilot operated compound relief valve 19, guide's end of this pilot operated compound relief valve 19 connects the first solenoid directional control valve 17, first solenoid directional control valve 17 is bi-bit bi-pass solenoid directional control valve, and one end of the first solenoid directional control valve 17 connects with fuel tank 15；Being provided with pressure switch 16 on the pipeline of flowline 161, pressure switch 16 controls the transposition of the first solenoid directional control valve 17 for the outlet pressure detecting oil pump 16.
Being additionally provided with the second solenoid directional control valve 20 between oil cylinder 3 and oil pump 16, the second solenoid directional control valve 20 is three-position four-way electromagnetic directional valve, utilizes flowline 161 and oil return pipe 162 to realize the oscilaltion process of piston 4 between the second solenoid directional control valve 20 and oil cylinder 3.
Pressure testing machine operation principle in the present embodiment is: first test block be placed on lower platen 5; the startup motor 13 that switches on power regulates spacing between top board 6 and lower platen 5; press oil-feed switch 11; oil pump 16 is oil suction in fuel tank 15 under the drive of hydraulic motor 13; in second solenoid directional control valve 20, electric magnet 1YA obtains electric; the lower section that now hydraulic oil enters into oil cylinder 3 from flowline 161 promotes piston 4 to drive the rising of lower platen 5; and the circulation fluid force feed in oil cylinder 3 is returned in fuel tank 15 by oil return pipe 162, shut down until test block to have been crushed stress test；Pressing oil return switch 12, Electrical heads 2YA obtains electro-hydraulic force feed and enters in oil cylinder 3 from oil return pipe 162 so that piston 4 declines, and circulation fluid force feed returns to fuel tank 15 from flowline 161.When the load pressure of piston 4 is excessive, cause the outlet pressure process of oil pump 16, now the preset pressure value within pressure switch 18 has been less than the outlet pressure of oil pump 16, pressure switch 18 sends signal of telecommunication electric magnet 3YA dead electricity, now guide's end of pilot operated compound relief valve 19 connects with fuel tank 15, turn on pilot operated compound relief valve 19, pilot operated compound relief valve 19 oil sump tank pressure release directly walked by the hydraulic oil drawn up from oil pump 16, after the outlet pressure of oil pump 16 drops to the preset pressure value of pressure switch 18, pressure switch reset electric magnet 3YA obtains electric, disconnect the connection with fuel tank 15, owing to the force value of pilot operated compound relief valve 19 cannot be opened more than the outlet pressure of oil pump 16, whole system recovers original circulation.
Embodiment two
Seeing Fig. 5, a kind of pressure testing machine, the difference with embodiment one is that the handwheel 21 that the oscilaltion process of leading screw 7 utilizes its upper end fixing realizes, and the most artificially rotates handwheel 21 and controls the oscilaltion of top board 6.
This specific embodiment is only to explanation of the present utility model; it is not to restriction of the present utility model; the present embodiment can be made after reading this specification by those skilled in the art as required does not has the amendment of creative contribution, but as long as all being protected by Patent Law in right of the present utility model.
Claims (7)
- null1. a pressure testing machine，Including body and and the hydraulic cabinet that is disposed adjacent of body，The bottom of described body is provided with oil cylinder (3)，Described hydraulic cabinet includes fuel tank (15)、The oil pump (16) being connected with fuel tank (15) and the hydraulic motor (13) being connected with oil pump (16)，It is characterized in that，Described oil pump (16) passes through flowline (161)、Oil return pipe (162) is connected with fuel tank (15)，Pilot operated compound relief valve (19) it is provided with on the pipeline of described flowline (161)，Described pilot operated compound relief valve (19) connects the first solenoid directional control valve (17)，Described first solenoid directional control valve (17) connects with fuel tank (15)，Pressure switch (18) it is additionally provided with on the pipeline of described flowline (161)，The commutation of described first solenoid directional control valve (17) is controlled by pressure switch (18).
- A kind of pressure testing machine the most according to claim 1, it is characterised in that described first solenoid directional control valve (17) is bi-bit bi-pass solenoid directional control valve.
- A kind of pressure testing machine the most according to claim 1, it is characterized in that, it is additionally provided with three position four-way electromagnetic valve on flowline (161) between described oil pump (16) and oil cylinder (3), described hydraulic cabinet is provided with oil-feed switch (11) controlling commutation about three position four-way electromagnetic valve and oil return switch (12).
- A kind of pressure testing machine the most according to claim 1, it is characterized in that, described body also includes underbeam (1), upper beam (8), it is arranged at oil cylinder (3) top and the top board (6) relative with lower platen (5) with the lower platen (5) that the piston of described oil cylinder (3) (4) is fixed and is connected the elevating mechanism of top board (6), the surface of described lower platen (5) is evenly equipped with some hemisphere juts (51).
- A kind of pressure testing machine the most according to claim 4, it is characterised in that described elevating mechanism includes the leading screw (7) being threadedly connected to upper beam (8) and is fixed on leading screw (7) one end and is used for the handwheel (21) driving leading screw (7) to rotate.
- A kind of pressure testing machine the most according to claim 4, it is characterized in that, described elevating mechanism includes the leading screw (7) being threadedly connected to upper beam (8) and is fixed on the motor (9) of upper beam (8), described motor (9) is located in the transmission case being fixed on upper beam (8), described leading screw (7) is arranged with worm gear and this worm gear and threadeds with leading screw (7), the motor shaft of described motor (9) connects has worm screw, described worm and wheel to be meshed.
- 7. according to a kind of pressure testing machine described in claim 5 or 6, it is characterized in that, installing plate (71) it is additionally provided with on one end of described leading screw (7), described top board (6) is connected with installing plate (71), is wherein provided with elastomeric pad (72) between top board (6) and installing plate (71).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620418645.1U CN205580885U (en) | 2016-05-10 | 2016-05-10 | Pressure testing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620418645.1U CN205580885U (en) | 2016-05-10 | 2016-05-10 | Pressure testing machine |
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| Publication Number | Publication Date |
|---|---|
| CN205580885U true CN205580885U (en) | 2016-09-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620418645.1U Active CN205580885U (en) | 2016-05-10 | 2016-05-10 | Pressure testing machine |
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| CN (1) | CN205580885U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110295770A (en) * | 2019-07-22 | 2019-10-01 | 河北派克风景园林工程有限公司 | A kind of gallery |
| CN113295532A (en) * | 2021-04-23 | 2021-08-24 | 河南省基本建设科学实验研究院有限公司 | Pressure test device and multi-station pressure test machine |
-
2016
- 2016-05-10 CN CN201620418645.1U patent/CN205580885U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110295770A (en) * | 2019-07-22 | 2019-10-01 | 河北派克风景园林工程有限公司 | A kind of gallery |
| CN113295532A (en) * | 2021-04-23 | 2021-08-24 | 河南省基本建设科学实验研究院有限公司 | Pressure test device and multi-station pressure test machine |
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