CN103452958B - Pressure valve debugging system - Google Patents
Pressure valve debugging system Download PDFInfo
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- CN103452958B CN103452958B CN201310415642.3A CN201310415642A CN103452958B CN 103452958 B CN103452958 B CN 103452958B CN 201310415642 A CN201310415642 A CN 201310415642A CN 103452958 B CN103452958 B CN 103452958B
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Abstract
The invention provides a kind of pressure valve debugging system, including: oil passage, including at least one oil pump, the output pipe of oil pump has the first output node; Pressure regulation test oil circuit, is connected with the first output node, is used for installing and waits to adjust pressure valve, and pressure regulation test oil circuit includes being arranged in series in waiting to adjust the effusion meter between pressure valve and the first output node and pressure detecting access point; Pressure limiting oil circuit, is connected with the first output node, for limiting the pressure of pressure regulation test oil circuit. The present invention will wait to adjust pressure valve to be connected on pressure regulation test oil circuit, pressure regulation is tested oil circuit and is carried out pressure and Flow-rate adjustment by oil passage, namely wait to adjust pressure valve to adopt unified connected mode, pipeline need not be reequiped during adjustment, the operational ton regulated thus effectively easing off the pressure, the problem solving working place restriction, it is also possible to prevent the disassembling pipe impact on Hydraulic system cleanliness; It addition, pressure regulation operator are without understanding loop works principle, reduce the requirement of operator.
Description
Technical field
The present invention relates to pressure valve pressure regulation assay device field, in particular to a kind of pressure valve debugging system.
Background technology
The hydraulic system functions such as hoister in large tonnage are gradually improved, and the flow of different circuit, pressure are different, carry out pressure limiting frequently with the overflow valve of different size, air relief valve equal pressure valve. Can each overflow valve, air relief valve accurately regulate the pressure of each pressure valve according to design, and the normal operation of crane is had large effect. It addition, the pressure drop that pressure valve is under different flow is different, in order to regulate pressure valve exactly, it is necessary to provide suitable flow.
Owing to the hydraulic system functions such as crane earlier are relatively easy, it is necessary to the overflow valve of adjustment, air relief valve are relatively fewer, prior art is continued to use always and directly in production debugging process pressure valve is carried out pressure controlled mode. But, along with the hydraulic system functions such as crane are gradually improved, it is necessary to carry out pressure controlled overflow valve, air relief valve is on the increase, continue along being used in actual product debugging process pressure valve is carried out pressure controlled mode problem highlighting gradually.
First, in debugging product, different pressures valve connected mode in different circuit is different, and the regulative mode of each pressure valve is also different, just require that the principle in the loop that each pressure valve and place thereof connect is had certain understanding by operator, otherwise cannot complete pressure and regulate. Secondly, in debugging product, the restriction of the installation site of the valve that is stressed, around pipeline and other parts, spanner space is inadequate, is not easy to operation. Again, some pressure valve can get rid of pressure to complete pressure adjustment either directly through corresponding actions; Some pressure valve then needs amendment pipeline, the cleannes of the disassembling pipe impact debugging whole hydraulic system of product.
Summary of the invention
It is desirable to provide a kind of easy to operate pressure valve debugging system.
The invention provides a kind of pressure valve debugging system, including: oil passage, including at least one oil pump, the output pipe of oil pump has the first output node; Pressure regulation test oil circuit, is connected with the first output node, is used for installing and waits to adjust pressure valve, and pressure regulation test oil circuit includes being arranged in series in waiting to adjust the effusion meter between pressure valve and the first output node and pressure detecting access point; Pressure limiting oil circuit, is connected with the first output node, for limiting the pressure of pressure regulation test oil circuit.
Further, pressure limiting oil circuit has tests, in pressure regulation, the voltage-limiting protection state that oil circuit conducting time limit pressure pressure is P9, and is the holding state of P0 at pressure regulation test oil circuit disconnection time limit pressure pressure, wherein, and P0 < P9.
Further, pressure limiting oil circuit includes the first pressure limiting oil circuit and the second pressure limiting oil circuit, the first pressure limiting oil circuit and the second pressure limiting oil circuit and is connected with the first output node respectively; Wherein, the pressure limiting pressure of the first pressure limiting oil circuit is P9; Being connected to electromagnetic valve on second pressure limiting oil circuit, when solenoid valve conduction, the pressure limiting pressure of the second pressure limiting oil circuit is P0.
Further, pressure limiting oil circuit includes the 3rd pressure limiting oil circuit and the 4th pressure limiting oil circuit; 3rd pressure limiting oil circuit and the first output node connect, and the 4th pressure limiting oil circuit is for controlling the duty of the 3rd pressure limiting oil circuit, and wherein, the duty of the 3rd pressure limiting oil circuit includes voltage-limiting protection state that pressure limiting pressure is P9 and pressure limiting pressure is the holding state of P0.
Further, the 3rd pressure limiting oil circuit being connected to precursor overflow valve, the oil pressure relief of precursor overflow valve is P9; 4th pressure limiting oil circuit is connected with the pilot control end of precursor overflow valve, and the 4th pressure limiting oil circuit is connected to electromagnetic valve, when solenoid valve conduction, and precursor overflow valve off-load.
Further, pressure regulation test oil circuit is provided with the stop valve being connected with the first output node, and electromagnetic valve turns on when stop valve disconnects and disconnects when stop valve turns on.
Further, pressure valve debugging system also includes: travel switch, is electrically connected with the solenoid valve, and coordinates with stop valve; Travel switch has when stop valve disconnects to make the first state of solenoid valve conduction, and makes the second state that electromagnetic valve disconnects when stop valve turns on.
Further, oil pump includes the first oil pump and the second oil pump; First oil delivery side of pump is connected by the first check valve and the first output node, and the second oil delivery side of pump is connected by the second check valve and the first output node.
Further, oil pump includes the first oil pump and the second oil pump; First oil delivery side of pump is connected by the first check valve and the first output node, and the second oil delivery side of pump is connected by the second check valve and the first output node; The port of export of the second check valve has the second output node, and is in series with the 3rd check valve preventing the fuel feeding of the first oil pump from flowing to the second output node between the first output node and the second output node; Second output node is connected to the 5th pressure limiting oil circuit, the 5th pressure limiting oil circuit is connected to overflow valve; Wherein, the oil pressure relief of overflow valve is P8, and P8 < P9.
Further, overflow valve is external control overflow valve, and the control end of external control overflow valve and the first output node connect.
Further, the rated pressure of the first oil pump is P2, and the rated pressure of the second oil pump is P4, wherein, and P8 < P4; P4 < P2; P9 < P2.
Pressure valve debugging system according to the present invention, wait to adjust pressure valve to be connected on pressure regulation test oil circuit, pressure and the Flow-rate adjustment of oil circuit is tested in pressure regulation by oil passage, namely wait to adjust pressure valve to adopt unified connected mode, pipeline need not be reequiped during adjustment, the operational ton regulated thus effectively easing off the pressure, the problem solving working place restriction, it is also possible to prevent the disassembling pipe impact on Hydraulic system cleanliness; Additionally, owing to waiting to adjust pressure valve to adopt unified connected mode, pressure regulation operator have only to wait to adjust pressure valve according to regulating to the corresponding instruction of the Pressure gauge that pressure detecting access point connects and effusion meter, without understanding loop works principle, reduce the requirement of operator.
Accompanying drawing explanation
The accompanying drawing constituting the part of the application is used for providing a further understanding of the present invention, and the schematic description and description of the present invention is used for explaining the present invention, is not intended that inappropriate limitation of the present invention. In the accompanying drawings:
Fig. 1 is the principle schematic of the pressure valve debugging system first embodiment according to the present invention;
Fig. 2 is the principle schematic of pressure valve debugging system the second embodiment according to the present invention; And
Fig. 3 is the principle schematic of pressure valve debugging system the 3rd embodiment according to the present invention.
Detailed description of the invention
Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
As depicted in figs. 1 and 2, debugging system according to the pressure valve of the present invention, including oil passage, pressure regulation test oil circuit and pressure limiting oil circuit, oil passage includes at least one oil pump, and the output pipe of oil pump has the first output node A; Pressure regulation test oil circuit and the first output node A connect, and are used for installing and wait to adjust pressure valve 17, and pressure regulation test oil circuit includes being arranged in series in waiting to adjust the effusion meter 14 between pressure valve 17 and the first output node A and pressure detecting access point; Pressure limiting oil circuit and the first output node A connect, for limiting the pressure of pressure regulation test oil circuit. The present invention by waiting to adjust, pressure valve 17 is unified to be connected on pressure regulation test oil circuit, and by oil passage, pressure regulation is tested pressure and the Flow-rate adjustment of oil circuit, pipeline need not be reequiped in time adjusting pressure valve 17 to regulate, the operational ton regulated thus effectively easing off the pressure, the problem solving working place restriction, it is also possible to prevent the disassembling pipe impact on Hydraulic system cleanliness; Additionally, owing to waiting to adjust pressure valve 17 to adopt unified connected mode, pressure regulation operator have only to wait to adjust pressure valve 17 according to regulating to the corresponding instruction of the Pressure gauge 15 that pressure detecting access point connects and effusion meter 14, without understanding loop works principle, reduce the requirement of operator.
Specifically, pressure limiting oil circuit has tests, in pressure regulation, the voltage-limiting protection state that oil circuit conducting time limit pressure pressure is P9, and is the holding state of P0 at pressure regulation test oil circuit disconnection time limit pressure pressure, wherein, and P0 < P9. That is, pressure regulation test oil circuit normal operation time, the pressure limiting pressure of pressure limiting oil circuit is P9, to whole debugging system formed protection, it is prevented that hypertonia and cause the system failure or damage. When pressure regulation test oil circuit does not work, as changed in the process waiting to adjust pressure valve 17, the pressure limiting pressure of pressure limiting oil circuit is that P0, P0 are generally only small, close to 0, so that whole debugging system need not be shut down, operating in less pressure state standby.
As shown in Figure 1, in the first embodiment of the present invention, pressure limiting oil circuit includes the first pressure limiting oil circuit and the second pressure limiting oil circuit, first pressure limiting oil circuit and the second pressure limiting oil circuit are connected with the first output node A respectively, wherein, the pressure limiting pressure of the first pressure limiting oil circuit is P9, and namely after the pressure of the first output node A is more than P9, whole system is from the first pressure limiting oil circuit off-load. Being connected to electromagnetic valve 10 on second pressure limiting oil circuit, when electromagnetic valve 10 turns on, the pressure limiting pressure of the second pressure limiting oil circuit is P0. It is to say, when disconnecting electromagnetic valve 10, the first pressure limiting oil circuit is operated in voltage-limiting protection state, and when electric conduction magnet valve 10, the second pressure limiting oil circuit is operated in holding state.
It is to say, by connecting electromagnetic valve 10 on the second pressure limiting oil circuit, it is possible to when oil circuit disconnection is tested in pressure regulation, make electromagnetic valve 10 turn on, so that whole system is in the holding state of low pressure operation, it is possible to efficiently reduce system-down number of times, improve efficiency. When particularly continuously adjusting multiple identical pressure valve, after first time regulates pressure and flow completes, have only to disconnect pressure regulation test oil circuit, make system standby, then changing and wait to adjust pressure valve, disconnect electromagnetic valve 10, conducting pressure regulation test oil circuit can enter debugging mode, need not again regulate pressure and flow, thus being greatly enhanced adjustment efficiency.
Preferably, as shown in Figure 1, pressure regulation test oil circuit is additionally provided with and the first output node A stop valve 13 being connected, realize conducting and the disconnection of pressure regulation test oil circuit, and stop valve 13 and electromagnetic valve 10 opposite action, namely electromagnetic valve 10 turns on when stop valve 13 disconnects, and disconnects when stop valve 13 turns on. Thus ensure pressure regulation test oil circuit disconnect stop time, whole system is from precursor overflow valve 9 off-load so that multiple in time adjusting pressure valve 17 regulating; change and wait to adjust in pressure valve 17 process without shutting down; closing stop valve 13, system is in low pressure operation state, energy-conservation and can be effectively improved work efficiency.
More preferably, pressure valve debugging system also includes the travel switch 12 electrically connected with electromagnetic valve 10, and travel switch 12 coordinates with stop valve 13 so that travel switch 12 triggers electromagnetic valve 10 conducting when stop valve 13 disconnects, and makes electromagnetic valve 10 disconnect when stop valve 13 turns on. Namely it is operated by stop valve 13 and can control electromagnetic valve 10, from without manually controlling electromagnetic valve 10 and stop valve 13, raising system degree of intelligence, avoid in debugging operations engineering, when disconnecting for one, and forget to turn on another, namely occur two situations about simultaneously switching off causing that system bears higher pressure.
In the second embodiment of the present invention; pressure limiting oil circuit adopts mode as shown in Figure 2; with first embodiment the difference is that; pressure limiting oil circuit includes the 3rd pressure limiting oil circuit and the 4th pressure limiting oil circuit; 3rd pressure limiting oil circuit and the first output node A connect; 4th pressure limiting oil circuit is for controlling the duty of the 3rd pressure limiting oil circuit, and wherein, the duty of the 3rd pressure limiting oil circuit includes voltage-limiting protection state that pressure limiting pressure is P9 and pressure limiting pressure is the holding state of P0. Namely the pressure limiting pressure of the 3rd pressure limiting oil circuit includes P0 and P9 two states. 4th pressure limiting oil circuit controls the pressure limiting pressure of the 3rd pressure limiting oil circuit to be changed between P0 and P9.
Specifically, as shown in Figure 2,3rd pressure limiting oil circuit is connected to precursor overflow valve 9, the oil pressure relief of precursor overflow valve 9 is P9,4th pressure limiting oil circuit is connected with the pilot control end of precursor overflow valve 9,4th pressure limiting oil circuit is connected to electromagnetic valve 10, when electromagnetic valve 10 turns on, precursor overflow valve 9 off-load. Namely, during pressure regulation test oil circuit ON operation, electromagnetic valve 10 disconnects, and precursor overflow valve 9 builds pressure, and now the oil pressure relief of precursor overflow valve 9 is P9, namely the 3rd pressure limiting oil circuit is operated in the voltage-limiting protection state that pressure limiting pressure is P9. When oil circuit disconnection stopping is tested in pressure regulation, electromagnetic valve 10 turns on, and the pilot control oil of precursor overflow valve 9 flows back to fuel tank 16, precursor overflow valve 9 off-load, namely the 3rd pressure limiting oil circuit and is operated in the holding state that pressure limiting pressure is P0, the standby operation of whole system low pressure. Usually, during in order to make system standby run, keep certain pressure, be also in series with counterbalance valve 11 at the 4th pressure limiting oil circuit. In a second embodiment, electromagnetic valve 1 adopts the control mode identical with first embodiment, and namely electromagnetic valve 10 is controlled by travel switch 12 and stop valve 13, and when stop valve 13 turns on, electromagnetic valve 10 disconnects, and when stop valve 13 disconnects, electromagnetic valve 10 turns on.
As shown in Figure 3, in the third embodiment of the present invention, compare first embodiment and the second embodiment, oil pump includes the first oil pump 2 and the second oil pump 4, the outfan of the first oil pump 2 is connected with the first output node A by the first check valve 6, and the outfan of the second oil pump 4 is connected with the first output node A by the second check valve 5.Namely two oil pumps are simultaneously to the first output node A fuel feeding, and the first check valve 6 and the second check valve 5 prevent hydraulic oil from refluxing, and protect two oil pumps. Preferably, two oil pumps adopt the combination of low pressure large discharge pump and high-pressure small-displacement pump, make full use of the feature of two pumps, and the pressure that can meet metered flow pressure valve dissimilar, different regulates.
Specifically, the rated pressure of the first oil pump 2 is that P2, rated discharge are q2, and are driven by the first motor 1 that rated speed is N1; The rated pressure of the second oil pump 4 is P4, rated discharge is q4, and the second motor 3 adopting rated speed to be N3 drives, wherein, and P4 < P2, P9 < P2. Preferably, the port of export of the second check valve 5 has the second output node B, and is in series with the 3rd check valve 7 preventing the fuel feeding of the first oil pump 2 from flowing to the second output node B between the first output node A and the second output node B; Second output node B is connected to the 5th pressure limiting oil circuit, the 5th pressure limiting oil circuit is connected to overflow valve 8; Wherein, the oil pressure relief of overflow valve 8 is P8, and P8 < P4, and namely the oil pressure relief of overflow valve 8 is less than the rated pressure of the second oil pump 4, thus the second oil pump is formed protection.
It addition, P8 < P9, namely when, after adjusting the pressure regulation pressure of pressure valve 17 more than P8, the second oil pump 4 is by overflow valve 8 off-load, the first independent fuel feeding of oil pump 2, it is prevented that charge oil pressure is excessive and rated pressure more than the second oil pump 4. Namely during two oil pump fuel feeding simultaneously, wait that the adjustable maximum pressure regulation pressure adjusting pressure valve 17 is P8, maximum stream flow is q4 �� N3+q2 �� N1, after pressure regulation pressure is more than P8, second oil pump 4 is by overflow valve 8 off-load, the first independent fuel feeding of oil pump 2, it is possible to the maximum pressure P9 of adjustment, after more than P9, the first oil pump 2 is by precursor overflow valve 9 off-load.
Preferably, as shown in Figure 1, overflow valve 8 is external control overflow valve, and the control end of this external control overflow valve and the first output node A connect, when two oil pumps fuel feeding simultaneously, in the process that charge oil pressure constantly increases, after charge oil pressure is more than P8, external control overflow valve turns on, and the 3rd check valve 7 is closed simultaneously, and the second oil pump 4 is by this external control overflow valve off-load. Owing to the pressure of the control end (i.e. the first output node A) of external control overflow valve is also above P8, this external control overflow valve is constantly in conducting state, so that the second oil pump 4 operates in low-pressure state. If overflow valve 8 is automatic control overflow valve, then the second oil pump 4 can run with oil pressure relief P8 always, can additionally increase system loading.
The operation principle of the pressure valve debugging system of the present invention is illustrated in conjunction with Fig. 3:
When pressure regulation starts, starting the second motor 3, low-speed running, when stop valve 13 is not turned on, the pilot control oil of precursor overflow valve 9 is through counterbalance valve 11 oil sump tank 16, precursor overflow valve 9 off-load, and the second oil pump 4 runs at low-pressure low flow.
Accessing after adjusting pressure valve 17, open stop valve 13, trigger travel switch 12 and make electromagnetic valve 10 disconnect, precursor overflow valve 9 builds pressure, and whole system is from treating tune pressure valve 17 off-load. Regulate the rotating speed of the second motor 3, it may be achieved metered flow is less than q4 �� N3, and the setting pressure pressure treating tune pressure valve 17 less than P8 regulates.
When the rotating speed of the second motor 3 reaches rated speed N3, restart the first motor 1, regulate the rotating speed of motor 1, it may be achieved metered flow is less than q4 �� N3+q2 �� N1, and the setting pressure pressure treating tune pressure valve 17 less than P8 regulates.
When, when the setting pressure of tune pressure valve 17 is more than P8, the second oil pump 4, from external control overflow valve off-load, regulates the rotating speed of the first motor 1, it may be achieved flow is less than q2 �� N1, and the setting pressure pressure treating tune pressure valve 17 less than P9 regulates.
Upper one wait adjusting after pressure valve 17 mixes up, it is not necessary to shut down, close stop valve 13, the pressure valve mixed up is pulled down from testing stand, makes a record, then by the next one after adjusting pressure valve 17 to install, then open stop valve 13, be adjusted by above step. Pressure valve 17 is adjusted, it is possible to reduce the operation to Flow-rate adjustment significantly, thus improving adjustment efficiency continuously adjusting multiple identical waiting.
As can be seen from the above description, the above embodiments of the present invention achieve following technique effect:
1. the pressure valve debugging system of the present invention adopts the combination of low pressure large discharge pump and high-pressure small-displacement pump, makes full use of the feature of two pumps, and the pressure that can meet metered flow pressure valve dissimilar, different regulates.
2. the pressure valve debugging system of the present invention is when regulating multiple pressure valve, without shutting down in handoff procedure, closes stop valve, and system is in low pressure operation state, energy-conservation and can be effectively improved work efficiency.
3. the pressure regulation process of the pressure valve debugging system of the present invention is independent of concrete pressure valve, need not transform pipeline, it is to avoid impact on product Hydraulic system cleanliness in adjustment process.
4. the principle of the pressure valve debugging system of the present invention is simple, easy to operate, reduces the requirement to operator.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations. All within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (6)
1. a pressure valve debugging system, it is characterised in that including:
Oil passage, including at least one oil pump, the output pipe of described oil pump has the first output node (A);
Pressure regulation test oil circuit, it is connected with described first output node (A), wait to adjust pressure valve (17) for installing, described pressure regulation test oil circuit include being arranged in series in described in wait to adjust the effusion meter (14) between pressure valve (17) and described first output node (A) and pressure detecting access point;
Pressure limiting oil circuit, is connected with described first output node (A), for limiting the pressure of described pressure regulation test oil circuit;
Wherein, described pressure limiting oil circuit has tests, in described pressure regulation, the voltage-limiting protection state that oil circuit conducting time limit pressure pressure is P9, and is the holding state of P0 at described pressure regulation test oil circuit disconnection time limit pressure pressure, wherein, and P0 < P9;
Described pressure limiting oil circuit includes the first pressure limiting oil circuit and the second pressure limiting oil circuit, described first pressure limiting oil circuit and described second pressure limiting oil circuit and is connected with described first output node (A) respectively, and wherein, the pressure limiting pressure of described first pressure limiting oil circuit is P9; Being connected to electromagnetic valve (10) on described second pressure limiting oil circuit, when described electromagnetic valve (10) turns on, the pressure limiting pressure of described second pressure limiting oil circuit is P0; Or, described pressure limiting oil circuit includes the 3rd pressure limiting oil circuit and the 4th pressure limiting oil circuit, described 3rd pressure limiting oil circuit is connected with described first output node (A), described 4th pressure limiting oil circuit is for controlling the duty of described 3rd pressure limiting oil circuit, wherein, the duty of the 3rd pressure limiting oil circuit includes voltage-limiting protection state that pressure limiting pressure is P9 and pressure limiting pressure is the holding state of P0;
Wherein, described oil pump includes the first oil pump (2) and the second oil pump (4);
The outfan of described first oil pump (2) is connected with described first output node (A) by the first check valve (6), and the outfan of described second oil pump (4) is connected with described first output node (A) by the second check valve (5);
The port of export of described second check valve (5) has the second output node (B), and is in series with the 3rd check valve (7) preventing the fuel feeding of described first oil pump (2) from flowing to described second output node (B) between described first output node (A) and described second output node (B);
Described second output node (B) is connected to the 5th pressure limiting oil circuit, described 5th pressure limiting oil circuit is connected to overflow valve (8); Wherein, the oil pressure relief of described overflow valve (8) is P8, and P8 < P9.
2. pressure valve according to claim 1 debugging system, it is characterised in that
When described pressure limiting oil circuit includes described 3rd pressure limiting oil circuit and described 4th pressure limiting oil circuit, described 3rd pressure limiting oil circuit being connected to precursor overflow valve (9), the oil pressure relief of described precursor overflow valve (9) is P9;
Described 4th pressure limiting oil circuit is connected with the pilot control end of described precursor overflow valve (9), described 4th pressure limiting oil circuit is connected to electromagnetic valve (10), when described electromagnetic valve (10) turns on, described precursor overflow valve (9) off-load.
3. pressure valve according to claim 1 debugging system, it is characterised in that
Described pressure regulation test oil circuit is provided with the stop valve (13) being connected with described first output node (A), and described electromagnetic valve (10) turns on when described stop valve (13) disconnects and disconnects when described stop valve (13) turns on.
4. pressure valve according to claim 3 debugging system, it is characterised in that described pressure valve debugging system also includes:
Travel switch (12), electrically connects with described electromagnetic valve (10), and coordinates with described stop valve (13);
Described travel switch (12) has the first state making described electromagnetic valve (10) turn on when described stop valve (13) disconnects, and makes the second state that described electromagnetic valve (10) disconnects when described stop valve (13) turns on.
5. pressure valve according to claim 1 debugging system, it is characterised in that
Described overflow valve (8) is external control overflow valve, and the control end of described external control overflow valve is connected with described first output node (A).
6. pressure valve according to claim 1 debugging system, it is characterised in that
The rated pressure of described first oil pump (2) is P2, and the rated pressure of described second oil pump (4) is P4, wherein, and P8 < P4; P4 < P2; P9 < P2.
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| CN201310415642.3A CN103452958B (en) | 2013-09-12 | 2013-09-12 | Pressure valve debugging system |
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| CN201310415642.3A CN103452958B (en) | 2013-09-12 | 2013-09-12 | Pressure valve debugging system |
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| CN103452958B true CN103452958B (en) | 2016-06-08 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105805090B (en) * | 2016-04-27 | 2018-08-28 | 北京交通大学 | A kind of turbine pump shut-off valve safety device |
| CN109372828B (en) * | 2018-10-15 | 2022-09-09 | 中国北方车辆研究所 | Hydraulic control system for comprehensive transmission device |
| CN112572386B (en) * | 2019-09-30 | 2022-08-09 | 比亚迪股份有限公司 | Device for processing a hydraulic vehicle brake system |
| CN111964900B (en) * | 2020-08-25 | 2023-11-24 | 浙江斯特隆科技有限公司 | Multipath pressure setting test bench |
| CN112460084B (en) * | 2020-11-16 | 2022-09-16 | 上海宝冶集团有限公司 | Temporary pump station hydraulic system for debugging engineering high-level equipment and debugging method |
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| CN102689427A (en) * | 2012-06-15 | 2012-09-26 | 成都市团结模具制造厂 | Energy-saving control system of injection molding machine and operating mode of energy-saving control system |
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| SU1418519A1 (en) * | 1985-12-02 | 1988-08-23 | Институт горного дела им.А.А.Скочинского | Bed for testing hydraulic units for susceptibility to fouling |
| CN101943638A (en) * | 2010-07-07 | 2011-01-12 | 徐工集团工程机械股份有限公司江苏徐州工程机械研究院 | Reliability test method and device of gripping tool rotating body of forestry crane |
| CN102689427A (en) * | 2012-06-15 | 2012-09-26 | 成都市团结模具制造厂 | Energy-saving control system of injection molding machine and operating mode of energy-saving control system |
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| CN103452958A (en) | 2013-12-18 |
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Address after: 410007 Yuelu District, Hunan, silver basin Road, No. 361, No. Applicant after: Zoomlion Heavy Industry Science & Technology Development Co., Ltd. Address before: 410007 ZOOMLION grand pond Industrial Park, Yuanda Road, Changsha economic and Technological Development Zone, Changsha, Hunan 2, China Applicant before: Zoomlion Heavy Industry Science & Technology Development Co., Ltd. |
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