CN210127991U - Hydraulic leak detection valve - Google Patents
Hydraulic leak detection valve Download PDFInfo
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- CN210127991U CN210127991U CN201920504891.2U CN201920504891U CN210127991U CN 210127991 U CN210127991 U CN 210127991U CN 201920504891 U CN201920504891 U CN 201920504891U CN 210127991 U CN210127991 U CN 210127991U
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Abstract
The utility model discloses a hydraulic pressure leak hunting valve, it includes proximity switch, trigger bar, five check valves, sets up the last plunger in the valve pocket of last valve piece and sets up the lower plunger in the valve pocket of valve piece down, go up the left piston, well piston and the right piston that follow its axial and arrange in proper order are cut apart into by two annular grooves on its lateral wall with lower plunger, all be equipped with seven oilholes of arranging in proper order from valve pocket left end to right-hand member on the lateral wall of the valve pocket of last valve piece and lower valve piece. The utility model discloses but the volume of the single oil pocket of accurate measurement inflow hydraulic cylinder hydraulic oil, the industrial computer can judge whether oil leak of this oil pocket and pipeline that connects according to the measured value, because the volume of hydraulic oil does not receive the influence of factors such as temperature, pressure, flow, load basically, therefore measuring result is accurate, reliable. The utility model discloses can in time, accurately detect out the oil leak point, provide reliable information for the getting rid of trouble.
Description
Technical Field
The utility model relates to a hydraulic pressure leak hunting valve suitable for large-scale or super large-scale hydraulic system can monitor the oil leak condition of pneumatic cylinder and pipeline under the production state belongs to and detects technical field.
Background
Along with the development of the ferrous metallurgy industry, hydraulic equipment is widely applied due to the technical advantages of the hydraulic equipment, a hydraulic system is gradually developed from miniaturization to large-scale or ultra-large-scale, for example, only a few oil cylinders can be controlled by one original hydraulic system, at present, 36 hydraulic cylinders can be controlled by a twelve-machine twelve-flow small square billet withdrawal and straightening hydraulic system, the 36 oil cylinders are arranged on a withdrawal machine, a straightening machine and an auxiliary withdrawal and straightening machine, oil pipes connected with the 36 oil cylinders are arranged under the withdrawal machine, the straightening machine and the auxiliary withdrawal and straightening machine, when a continuous casting machine is produced, the oil cylinders and the oil pipes all work in a high-temperature and high-humidity environment, the leakage detection of the hydraulic system is difficult, and particularly, in the production process, the oil leakage is difficult to detect under the condition that the leakage amount is not very large.
At present, the detection methods of oil leakage of a hydraulic system mainly comprise the following steps:
1. the oil leakage monitoring mode of the hydraulic pump station is adopted, namely the liquid level of the oil tank is monitored, and the alarm is given when the liquid level change is monitored. The global monitoring mode is adopted in the device and the method for detecting the oil leakage of the hydraulic oil disclosed in the Chinese patent No. 201610096652.9 and the device for quickly detecting the oil leakage of the hydraulic system disclosed in the Chinese patent No. 201420385942.1. In large hydraulic systems or very large systems, only the leaked oil is known, but the leakage point at that cylinder or pipe is not known. The pump can be stopped and paralyzed after the hydraulic station is searched for a long time, so that large-area equipment accidents are caused.
2. Monitoring each part by adopting flow sensor and pressure sensor
For example, in the oil leakage detection device disclosed in chinese patent application No. 201711172685.8, a flow sensor is installed in each pipeline in a hydraulic system, and whether oil leakage occurs is determined by comparing with previous flow data, where the flow of a hydraulic pipeline refers to the volume of hydraulic oil flowing through a certain cross section at a certain time, and is related to the pressure and temperature of the system. The method for judging oil leakage and pressure fluctuation of the hydraulic station disclosed in Chinese patent No. 201610370718.9 is characterized in that a liquid level sensor and a pressure sensor are used for carrying out instantaneous pressure monitoring, the oil leakage and the pressure fluctuation of the hydraulic station are judged from two aspects of change rate and cumulant, and instantaneous monitoring alarm and historical monitoring alarm are respectively carried out. The method is influenced by the running state of equipment, pressure fluctuation, liquid level fluctuation and other factors, can generate the condition of misinformation, and can only be applied to small hydraulic stations, and occasions with few working oil cylinders, small load change and good working environment of a hydraulic system are provided.
3. An image acquisition method, such as the "oil leakage detection device for a hydraulic pipeline" disclosed in chinese patent No. 201620474093.6, uses optical and electronic components such as a camera to acquire images of the hydraulic pipeline, and the method has the disadvantage that the investment in large-scale hydraulic equipment is high and the method is not suitable for severe environments.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to the drawback of prior art, provide a hydraulic pressure leak hunting valve suitable for large-scale or super large-scale hydraulic system to in time, accurately detect out the oil leak fault point.
The problem of the utility model is realized with following technical scheme:
a hydraulic leak detection valve comprises a proximity switch, a trigger rod, five one-way valves, an upper plunger arranged in a valve cavity of an upper valve block and a lower plunger arranged in a valve cavity of a lower valve block, wherein the upper plunger and the lower plunger are divided into a left piston, a middle piston and a right piston which are sequentially arranged along the axial direction by two annular grooves on the side wall of the upper plunger and the lower plunger, seven oil holes which are sequentially arranged from the left end to the right end of the valve cavity are respectively arranged on the side wall of the valve cavity of the upper valve block and the side wall of the valve cavity of the lower valve block, a first oil hole, a third oil hole, a fifth oil hole and a seventh oil hole of the upper valve block are respectively connected with a third oil hole, a seventh oil hole, a first oil hole and a fifth oil hole of the lower valve block, a fourth oil hole of the upper valve block and a fourth oil hole of the lower valve block are respectively connected with a low-pressure oil circuit through four one-way valves, and the other one-way valve is connected between the, one end of the trigger rod penetrates through the upper valve block and is in butt joint with the left end of the upper plunger, the other end of the trigger rod corresponds to the proximity switch, and the output end of the proximity switch is connected with the industrial personal computer.
The hydraulic leak detection valve further comprises a middle valve block, the middle valve block is clamped between the upper valve block and the lower valve block, and oil holes formed in the upper valve block and the lower valve block and connected with each other are communicated through the oil holes in the middle valve block.
In the hydraulic leak detection valve, the five check valves are all arranged in the lower valve block.
In the hydraulic leak detection valve, the proximity switch is a photoelectric proximity switch.
The utility model discloses but the volume of the single oil pocket of accurate measurement inflow hydraulic cylinder hydraulic oil, the industrial computer can judge whether oil leak of this oil pocket and pipeline that connects according to the measured value, because the volume of hydraulic oil does not receive the influence of factors such as temperature, pressure, flow, load basically, therefore measuring result is accurate, reliable. The utility model discloses can in time, accurately detect out the oil leak point, provide reliable information for the getting rid of trouble.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic view of the initial state of the present invention (upper plunger on the right, lower plunger on the right);
FIG. 2 is a schematic view of the present valve block configuration;
FIG. 3 is a schematic view of the lower valve block construction;
fig. 4 shows the first working state of the present invention (after the lower plunger is moved to the left, the upper plunger is at the right, and the lower plunger is at the left);
fig. 5 shows the second working state of the present invention (after the upper plunger is moved to the left, the upper plunger is at the left, and the lower plunger is at the left);
fig. 6 shows the third working state of the present invention (after the lower plunger is moved to the right, the upper plunger is at the left, and the lower plunger is at the right);
fig. 7 is a schematic diagram of the leakage detection on line of the present invention.
The figures are labeled as follows: 1. a first check valve, 2, a second check valve, 3, a lower valve block, 4, a lower plunger, 5, an upper valve block, 6, an upper plunger, 7, a middle valve block, 8, a third check valve, 9, a fourth check valve, 10, a fifth check valve, 11, a proximity switch, 12, a trigger rod, 13, an upper left oil chamber, 14, an upper left piston, 15, an upper left groove, 16, an upper middle piston, 17, an upper right groove, 18, an upper right piston, 19, a lower left oil chamber, 20, a lower left piston, 21, a lower left groove, 22, a lower middle piston, 23, a lower right groove, 24, a lower right piston, 25, a lower right oil chamber, 26, an upper right oil chamber, 27, a sixth check valve, 28, a stop valve, 29, a three-position four-way reversing valve, 30, a double check valve, 31, a second hydraulic valve, 32, a first hydraulic valve, 33, a hydraulic cylinder, F, a first oil hole of the upper valve block, a second oil hole of the upper valve block, B. the oil pump comprises an upper valve block, a lower valve block, a first oil hole, a third oil hole, a fourth oil hole, a fifth oil hole, a sixth oil hole, a G seventh oil hole, a f first oil hole, a second oil hole, a third oil hole, a fourth oil hole, a D fifth oil hole, a sixth oil hole, a G seventh oil hole, a K, M, a high-pressure oil pipe, a H low-pressure oil pipe.
Detailed Description
The utility model provides a hydraulic pressure leak hunting valve, whether this kind of hydraulic pressure leak hunting valve can online monitoring hydraulic equipment oil leak, and it detects the precision height, can detect the pipeline of oil leak, reduces the searching range. When a large amount of hydraulic oil leaks out the trouble suddenly, the industrial computer can automatically cut off the oil source according to the testing result, prevents that hydraulic oil of hydraulic tank from leaking completely, avoids causing bigger equipment accident.
Referring to fig. 1, 2 and 3, the present invention includes five check valves (i.e. a first check valve 1, a second check valve 2, a third check valve 8, a fourth check valve 9 and a fifth check valve 10), a lower valve block 3, a lower plunger 4, an upper valve block 5, an upper plunger 6, a middle valve block 7, a proximity switch 11 and a trigger lever 12.
The lower plunger 4 is located in a valve cavity of the lower valve block 3, two annular grooves are formed in the side wall of the lower plunger 4 and respectively include a lower left groove 21 and a lower right groove 23, the two annular grooves divide the lower plunger 4 into a lower left piston 20, a lower middle piston 22 and a lower right piston 24 which are sequentially arranged along the axial direction of the lower plunger, seven oil holes are formed in the side wall of the valve cavity of the lower valve block 3, and a lower valve block first oil hole f, a lower valve block second oil hole a, a lower valve block third oil hole b, a lower valve block fourth oil hole c, a lower valve block fifth oil hole d, a lower valve block sixth oil hole e and a lower valve block seventh oil hole g are sequentially formed from left to right. The lower left piston 20, the lower middle piston 22 and the lower right piston 24 are parts of the lower plunger 4 which are tightly matched with the inner wall of the valve cavity of the lower valve block 3, and the lower left groove 21 and the lower right groove 23 are two oil holes which are used for communicating the lower plunger 4 with the inner wall of the valve cavity of the lower valve block 3. When the lower plunger 4 moves to the rightmost end, a cavity defined by the left end of the lower left piston 20 and the inner wall of the valve cavity of the lower valve block 3 is a lower left oil cavity 19, and when the lower plunger 4 moves to the leftmost end, a cavity defined by the right end of the lower right piston 20 and the inner wall of the valve cavity of the lower valve block 3 is a lower right oil cavity 25.
The upper plunger 6 is positioned in the valve cavity of the upper valve block 5, two annular grooves, namely an upper left groove 15 and an upper right groove 17, are arranged on the side wall of the upper plunger 6, and divide the upper plunger 6 into an upper left piston 14, an upper middle piston 16 and an upper right piston 18 which are sequentially arranged along the axial direction of the upper left piston, seven oil holes are arranged on the side wall of the valve cavity of the upper valve block 5, and an upper valve block first oil hole F, an upper valve block second oil hole A, an upper valve block third oil hole B, an upper valve block fourth oil hole C, an upper valve block fifth oil hole D, an upper valve block sixth oil hole E and an upper valve block seventh oil hole G are sequentially arranged from left to right. The upper left piston 14, the upper middle piston 16 and the upper right piston 18 are parts of the upper plunger 6 which are tightly matched with the inner wall of the valve cavity of the upper valve block 5, and the upper left groove 15 and the upper right groove 17 are used for communicating two oil holes on the inner wall of the valve cavity of the upper valve block 5. When the upper plunger 6 moves to the rightmost end, a cavity defined by the left end of the upper left piston 14 and the inner wall of the valve cavity of the upper valve block 5 is an upper left oil cavity 13, and when the upper plunger 6 moves to the leftmost end, a cavity defined by the right end of the upper right piston 18 and the inner wall of the valve cavity of the upper valve block 5 is an upper right oil cavity 26.
A trigger lever 12 is mounted on the left end surface of the upper left piston 14 to move in accordance with the movement of the upper plunger 6, and an electro-optical proximity switch 11 is mounted on the outside of the upper valve block 5 for counting the number of times the trigger lever 12 reciprocates (i.e., the number of times the upper plunger 6 reciprocates).
The upper plunger 6 and the lower plunger 4 are the same, the valve cavities of the upper plunger and the lower plunger are also the same, and the four cavities of the upper left oil cavity 13, the upper right oil cavity 26, the lower left oil cavity 19 and the lower right oil cavity 25 are also the same and are metering oil cavities with the same volume. Five check valves (a first check valve 1, a second check valve 2, a third check valve 8, a fourth check valve 9, and a fifth check valve 10) are installed in the lower valve block 3 for unidirectional flow of oil.
The middle valve block 7 is mainly provided with various oil paths for flowing hydraulic oil in the middle parts of the upper valve block 5 and the lower valve block 3.
The operation of the hydraulic leak detection valve will be described with reference to fig. 1 to 6.
K, M is a communicated high-pressure oil path, the upper plunger 6 is at the right, the lower plunger 4 is at the right, at this time, the fourth oil hole C of the upper valve block connected with the high-pressure oil path K is communicated with the third oil hole B of the upper valve block and the seventh oil hole G of the lower valve block through the upper left groove 15, the high-pressure oil acts on the right side of the lower right piston 24 of the lower plunger 4 to push the lower plunger 4 to move to the left, at the same time, the hydraulic oil of the lower left oil chamber 19 sequentially passes through the first oil hole f of the lower valve block, the fifth oil hole D of the upper valve block, the upper right groove 17, the sixth oil hole E of the upper valve block and the fourth check valve 9 to flow out from the low-pressure oil pipe H, when the lower plunger 4 moves to the left, at this time, as shown in figure 4, the fourth oil hole C of the lower valve block connected with the high-pressure oil path M is communicated with the fifth oil hole D of the upper valve block and the seventh oil hole G of the upper valve block through the lower, the upper plunger 6 is pushed to move leftwards, meanwhile, hydraulic oil in the upper left oil chamber 13 flows out through the upper valve block first oil hole F, the lower valve block third oil hole B, the lower left groove 21, the lower valve block second oil hole a and the second one-way valve 2 through the low-pressure oil path H, when the upper plunger 6 moves to the left end, the trigger rod 12 on the left side of the upper left piston 18 of the upper plunger 6 extends out, the photoelectric proximity switch 11 on the outer side of the upper valve block 5 is triggered, at the left end, the lower plunger 4 is positioned at the left end, as shown in fig. 5, the upper valve block fourth oil hole C connected with the high-pressure oil path K is communicated with the upper valve block fifth oil hole D and the lower valve block first oil hole F through the upper right groove 17, the hydraulic oil acts on the left end face of the lower left piston of the lower plunger 4 to push the lower plunger 4 to move rightwards, and meanwhile, the hydraulic oil in the lower right oil chamber 25 passes through the lower valve block seventh oil hole g, the upper valve block third, The first check valve 1 flows out from the low pressure oil path H, when the lower plunger 4 moves to the left, the upper plunger 6 is still at the right end, as shown in fig. 6, the lower valve block fourth oil hole c connected with the high pressure oil path M is communicated with the upper valve block first oil hole F through the lower left groove 21 and the lower valve block third oil hole b, the hydraulic oil acts on the left side of the upper left piston 14 of the upper plunger 6 to push the plunger 6 to move to the right, simultaneously the hydraulic oil of the upper right oil chamber 26 flows out from the low pressure oil path H through the upper valve block seventh oil hole G, the lower valve block fifth oil hole d, the lower right groove 23, the lower valve block sixth oil hole e and the third check valve 8, when the upper plunger 6 moves to the right end, the trigger rod 12 at the left side of the upper left piston 18 of the upper plunger 6 retracts, the photoelectric proximity switch 11 at the outer side of the upper valve block 5 cannot monitor the trigger rod 12, the lower plunger 4 is still at the right end, and the state is shown in fig. 1, thus, as long as the pressure of the hydraulic oil in the high-pressure oil path K, M is greater than that of the hydraulic oil in the low-pressure oil path H, the hydraulic oil in the high-pressure oil path K, M flows into the low-pressure oil path H through the hydraulic leak detection valve, in each oil supply period, the photoelectric proximity switch 11 detects the trigger rod 12 once every time, the hydraulic oil in four metering oil chambers with 4 volumes equal flows through the hydraulic leak detection valve, the hydraulic oil continuously passes through the hydraulic leak detection valve, the proximity switch 11 continuously detects the trigger rod 12 and records the hydraulic oil by the industrial personal computer, and if the pressure oil is in the low-pressure oil path H, the high-pressure oil path K is connected with the oil return line, the pressure oil in the low-pressure oil path H flows into the high-pressure.
The on-line leak detection method of the present invention is further described with reference to the embodiment shown in fig. 7.
Fig. 7 is the utility model discloses a hydraulic system who uses, it comprises sixth check valve 27, stop valve 28, tribit four-way reversing valve 29, two hydraulic control check valves 30, second hydraulic pressure leak detection valve 31, first hydraulic pressure leak detection valve 32, pneumatic cylinder 33, debugs before coming into use, guarantees that hydraulic pressure pipeline and pneumatic cylinder 33 do not have the seepage.
The working flow of leak detection is as follows:
1. the first hydraulic leak detection valve 32 and the second hydraulic leak detection valve 31 are respectively installed in hydraulic pipelines connected with a rodless cavity and a rod cavity of the hydraulic cylinder 33, a high-pressure oil path K, M of the first hydraulic leak detection valve 32 and the second hydraulic leak detection valve 31 is located on one side of the double hydraulic control one-way valve 30, a low-pressure oil path H is located on one side of the hydraulic cylinder 33, and the times N1 and N2 of extension of trigger rods of the first hydraulic leak detection valve 32 and the second hydraulic leak detection valve 31 when a piston of the hydraulic cylinder 33 moves from an upper cylinder bottom to a lower cylinder bottom and the piston moves from the lower cylinder bottom to the upper cylinder bottom are determined before leak detection.
1) Determination of the number of times the trigger rod of the first hydraulic leak detection valve 32 is extended when the piston of the hydraulic cylinder 33 moves downward from the upper cylinder bottom to the lower cylinder bottom N1:
the electromagnet 1DT of the three-position four-way reversing valve 29 is electrified, the electromagnet 2DT is electrified, high-pressure oil enters a rodless cavity of the hydraulic cylinder 33 through the stop valve 28, the three-position four-way reversing valve 29, the double-hydraulic-control one-way valve 30 and the first hydraulic leakage detection valve 32 to push the piston to move downwards, meanwhile, hydraulic oil in the rod cavity flows back to an oil tank through the second hydraulic leakage detection valve 31, the double-hydraulic-control one-way valve 30, the three-position four-way reversing valve 29, the sixth one-way valve 27 and an oil return pipeline, and when the piston reaches the lowest end of the hydraulic cylinder 33, the industrial personal computer records that the extending times of the trigger rod 12 of the.
2) Determination of the number of times the trigger rod of second hydraulic leak detection valve 31 extends when the piston of hydraulic cylinder 33 moves downward from the lower bottom to the upper bottom N2:
the electromagnet 1DT of the three-position four-way reversing valve 29 is powered off, the electromagnet 2DT is powered on, high-pressure oil enters a rod cavity of the hydraulic cylinder 33 through the stop valve 28, the three-position four-way reversing valve 29, the double hydraulic control one-way valve 30 and the second hydraulic leakage detection valve 31 to push the piston to move upwards, meanwhile, hydraulic oil in the rod cavity flows back to an oil tank through the first hydraulic leakage detection valve 32, the double hydraulic control one-way valve 30, the three-position four-way reversing valve 29, the sixth one-way valve 27 and an oil return pipeline, and when the piston reaches the highest end of the hydraulic cylinder 33, the industrial personal computer records the extending times N2 of the trigger rod 12 of.
2. Number of times n1 that the trigger rod of the first hydraulic leak detection valve 32 extends when the piston of the on-line monitoring hydraulic cylinder 33 moves downward from the upper cylinder bottom to the lower cylinder bottom:
the electromagnet 1DT of the three-position four-way reversing valve 29 is electrified, the 2DT is electrified, high-pressure oil enters a rodless cavity of a hydraulic cylinder 33 through a stop valve 28, the three-position four-way reversing valve 29, a double-hydraulic-control one-way valve 30 and a first hydraulic leakage detection valve 32 to push a piston to move downwards, meanwhile, hydraulic oil in a rod cavity flows back to an oil tank through a second hydraulic leakage detection valve 31, the double-hydraulic-control one-way valve 30, the three-position four-way reversing valve 29, a sixth one-way valve 27 and an oil return pipeline, when the piston reaches the lowest end of the hydraulic cylinder 33, the industrial personal computer records the extending times of a trigger rod 12 of the first hydraulic leakage detection valve 32, when the electromagnet 1DT of the three-position four-way reversing valve 29 is electrified, the 2DT is always electrified, the industrial personal computer controls the electromagnet 1 of the three-position four-way reversing valve 29 to be electrified, when the DT is electrified, the DT, the number of times the trigger lever 12 of the first hydraulic leak-detection valve 32 is detected to be extended is n 1.
1) When N1= N1, the hydraulic line from the hydraulic control valve station to the rodless chamber of the hydraulic cylinder 33 and the rodless chamber of the hydraulic cylinder 33 are free from oil leakage.
2) When N1 is more than N1 and less than or equal to 2N1, a hydraulic pipeline between the hydraulic control valve table and the rodless cavity of the hydraulic cylinder 33 or the rodless cavity of the hydraulic cylinder 33 has micro leakage, and the industrial personal computer sends out an oil leakage alarm signal.
3) When N1 is more than 2N1, the oil leaks from the hydraulic pipeline between the hydraulic control valve table and the rodless cavity of the hydraulic cylinder 33 or the rodless cavity of the hydraulic cylinder 33, the industrial personal computer sends an oil leakage alarm signal and enables the electromagnet 1DT of the three-position four-way reversing valve 29 to lose power, the electromagnet 2DT to lose power and the double-hydraulic control one-way valve 30 to be locked, the hydraulic pipeline between the hydraulic control valve table and the rodless cavity of the hydraulic cylinder 33 is cut off, and the accident is prevented from further expanding.
3. And (3) monitoring the extending times n2 of the trigger rod of the second hydraulic leakage detection valve 31 when the piston of the hydraulic cylinder 33 moves downwards from the lower cylinder bottom to the upper cylinder bottom on line:
the electromagnet 1DT of the three-position four-way reversing valve 29 is de-energized, the 2DT is energized, high-pressure oil enters a rod cavity of a hydraulic cylinder 33 through a stop valve 28, the three-position four-way reversing valve 29, a double-hydraulic-control one-way valve 30 and a second hydraulic leakage detection valve 31 to push a piston to move upwards, meanwhile, hydraulic oil in a rodless cavity flows back to an oil tank through a first hydraulic leakage detection valve 32, the double-hydraulic-control one-way valve 30, the three-position four-way reversing valve 29, a sixth one-way valve 27 and an oil return pipeline, when the piston reaches the highest end of the hydraulic cylinder 33, the industrial personal computer records the extending times of a trigger rod of the second hydraulic leakage detection valve 31, when the electromagnet 1DT of the three-position four-way reversing valve 29 is de-energized and the 2DT is energized, the industrial computer controls the electromagnet 1DT to be de-energized, when the 2DT is energized, records the extending times of the, the number of times the trigger lever of second hydraulic leak detection valve 31 is detected to be extended is n 2.
1) When N2= N2, the hydraulic line from the hydraulic control valve station to the rod chamber of the cylinder 33 and the rod chamber of the cylinder 33 are free from oil leakage.
2) When N2 is more than N2 and less than or equal to 2N2, a hydraulic pipeline between the hydraulic control valve table and the rod cavity of the hydraulic cylinder 33 have micro leakage, and the industrial personal computer sends out an oil leakage alarm signal.
3) When N2 is more than 2N2, the oil leaks from the hydraulic pipeline between the hydraulic control valve table and the rod cavity of the hydraulic cylinder 33, the industrial personal computer sends out an oil leakage alarm signal and enables the three-position four-way reversing valve 29 electromagnet 1DT to be powered off, the 2DT to be powered off, the double-hydraulic control one-way valve 30 is locked, the hydraulic pipeline between the hydraulic control valve table and the rod cavity of the hydraulic cylinder 33 is cut off, and the accident is prevented from further expanding.
Claims (4)
1. A hydraulic leak detection valve is characterized by comprising a proximity switch (11), a trigger rod (12), five one-way valves, an upper plunger (6) arranged in a valve cavity of an upper valve block (5) and a lower plunger (4) arranged in the valve cavity of a lower valve block (3), wherein the upper plunger (6) and the lower plunger (4) are divided into a left piston, a middle piston and a right piston which are sequentially arranged along the axial direction by two annular grooves on the side wall of the upper plunger, seven oil holes which are sequentially arranged from the left end to the right end of the valve cavity are respectively arranged on the side wall of the valve cavity of the upper valve block (5) and the side wall of the valve cavity of the lower valve block (3), a first oil hole, a third oil hole, a fifth oil hole and a seventh oil hole of the upper valve block (5) are respectively connected with a third oil hole, a seventh oil hole, a first oil hole and a fifth oil hole of the lower valve block (3), and a fourth oil hole of the upper valve block (5) and the lower valve block (3) are connected with, the second oil hole and the sixth oil hole of the upper valve block (5) and the lower valve block (3) are respectively connected with a low-pressure oil way through four one-way valves, the other one-way valve is connected between the low-pressure oil way and a high-pressure oil way, one end of the trigger rod (12) penetrates through the upper valve block (5) and is in butt joint with the left end of the upper plunger (6), the other end of the trigger rod corresponds to the proximity switch (11), and the output end of the proximity switch (11) is connected with an industrial personal computer.
2. The hydraulic leak detection valve according to claim 1, characterized by further comprising a middle valve block (7), wherein the middle valve block (7) is clamped between the upper valve block (5) and the lower valve block (3), and oil holes of the upper valve block (5) and the lower valve block (3) are communicated through the oil holes in the middle valve block (7).
3. Hydraulic leak detection valve according to claim 1 or 2, characterized in that the five non-return valves are each arranged in the lower valve block (3).
4. Hydraulic leak detection valve according to claim 3, characterised in that the proximity switch (11) is an electro-optical proximity switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920504891.2U CN210127991U (en) | 2019-04-15 | 2019-04-15 | Hydraulic leak detection valve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920504891.2U CN210127991U (en) | 2019-04-15 | 2019-04-15 | Hydraulic leak detection valve |
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| CN210127991U true CN210127991U (en) | 2020-03-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110081044A (en) * | 2019-04-15 | 2019-08-02 | 宣化钢铁集团有限责任公司 | A kind of hydraulic leak detector valve and online leak hunting method |
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2019
- 2019-04-15 CN CN201920504891.2U patent/CN210127991U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110081044A (en) * | 2019-04-15 | 2019-08-02 | 宣化钢铁集团有限责任公司 | A kind of hydraulic leak detector valve and online leak hunting method |
| CN110081044B (en) * | 2019-04-15 | 2024-02-02 | 宣化钢铁集团有限责任公司 | Hydraulic leak detection valve and online leak detection method |
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