CN117825015A - Breaking hammer valve seat assembly test workbench - Google Patents

Abstract

The invention provides a breaking hammer valve seat assembly test workbench, and belongs to the technical field of breaking hammers. The technical problems of high cost, complex detection and the like of an existing breaking hammer test workbench are solved. The breaking hammer valve seat assembly test workbench comprises a test breaking hammer and an oil path block, wherein a connection face is arranged on the oil path block and used for being in sealing connection with the valve seat assembly, and a plurality of test oil pipes are connected between the oil path block and the test breaking hammer. The invention has the advantages of small volume and convenient and quick detection.

Description

Breaking hammer valve seat assembly test workbench

Technical Field

The invention belongs to the technical field of breaking hammers, and particularly relates to a breaking hammer valve seat assembly test workbench.

Background

Hydraulic breaking hammers have become an important working tool of hydraulic excavators, and generally include a front cylinder, a middle cylinder and a rear cylinder, wherein a drill rod is disposed in the front cylinder, the middle cylinder is connected with the front cylinder, a piston is disposed in the middle cylinder, the piston makes a reciprocating motion in the middle cylinder in a fixed period, a reversing valve seat assembly is disposed on the middle cylinder or the rear cylinder, and the valve seat assembly is one of important components of the hydraulic breaking hammers. After the valve seat assembly is designed and manufactured, the valve seat assembly is inspected to be finally put on the market.

At present, the valve seat assembly needs to be installed on the corresponding breaking hammer, and the valve seat assembly can be inspected after the valve seat assembly is assembled into a complete hydraulic breaking hammer. And the valve seat assembly of one model needs a complete hydraulic breaking hammer to be matched with the hydraulic breaking hammer, so that the cost is high. And when the inspection result and the expected data are different, it is more difficult to judge which part has a problem, and the final fault part can be determined only by gradually replacing each part. The inspection process of the valve seat assembly of the large hydraulic breaking hammer is complex and has high cost.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a breaking hammer valve seat assembly test workbench. The testing device can measure the state of the valve seat when the hydraulic breaking hammer works normally so as to judge whether the valve seat accords with the standard or not and whether the valve seat can work normally or not.

The aim of the invention can be achieved by the following technical scheme: the utility model provides a quartering hammer disk seat assembly test workbench, includes test quartering hammer and oil circuit piece, be equipped with the connection face on the oil circuit piece, the connection face is used for with disk seat assembly sealing connection, be connected with a plurality of test oil pipes between oil circuit piece and the test quartering hammer.

The breaking hammer valve seat assembly test workbench can effectively judge whether the valve seat assembly accords with the standard or not and can work normally or not. The workbench comprises a test breaking hammer and an oil circuit block, wherein the oil circuit block plays a role in connecting oil supply equipment, a tested valve seat assembly and the test breaking hammer.

In the prior art, the tested valve seat assembly needs to be installed on a middle cylinder body in actual work, and can be inspected after the tested valve seat assembly is assembled into a complete hydraulic breaking hammer.

If the valve seat assembly to be tested and the corresponding breaking hammer are mutually matched and directly connected, as one type of valve seat assembly corresponds to one type of breaking hammer, different types of breaking hammers are needed for adapting to the test of different types of valve seat assemblies, and the waste and the cost are high. The oil circuit block is arranged on the valve seat assembly to be tested, the oil circuit block is a metal block and can be an iron block, materials are easy to obtain, the processing is simple, and the cost is low. Because the valve seat assembly and the test breaking hammer are connected, the good sealing performance is required, the contact surface of the bottom surface of the valve seat assembly cannot be damaged, and the oil hole in the valve seat assembly cannot be damaged, therefore, the oil circuit block is arranged to connect the valve seat assembly and the test breaking hammer, the connection surface arranged on the oil circuit block is in sealing connection with the lower bottom surface of the valve seat assembly, the oil circuit block corresponds to the oil hole of the valve seat assembly one by one, the oil circuit block is connected with the test breaking hammer, one of the test breaking hammers can adapt to a plurality of different valve seat assemblies, the oil circuit of the breaking hammer in actual work is very complex, and the oil circuit of the test breaking hammer at the moment is very simple.

In the prior art, when detecting, the valve seat assembly is mutually matched and directly connected with the corresponding breaking hammer, any device cannot be arranged in the middle of the valve seat assembly and the corresponding breaking hammer, so that the condition that the hydraulic flow and the hydraulic pressure on each oil way cannot be detected is difficult to judge which part is problematic, the part which is finally failed can be determined only by gradually replacing each part, and the detection process is complicated. After the valve seat assembly to be tested is connected with the test breaking hammer through the oil path block, the oil path block is connected with the test breaking hammer through the oil pipe, and the detection device can be arranged at the joint of the oil path block and the oil pipe to detect the condition of each oil path, so that faults can be well removed.

The breaking hammer valve seat assembly test workbench can measure the state of the valve seat assembly when the hydraulic breaking hammer works normally so as to judge whether the valve seat accords with the standard or not and whether the hydraulic breaking hammer can work normally or not. The breaking hammer valve seat assembly test workbench is small in size, convenient and quick to detect, capable of independently judging whether the valve seat is faulty or not, capable of avoiding interference of other equipment of the whole machine, and accurate and reliable in test result.

Further, a test oil inlet cavity, a test signal cavity, a test oil return cavity and a test high-low pressure switching cavity are formed in the test breaking hammer, a signal hole, an oil inlet hole, an oil return hole and a high-low pressure switching oil hole are formed in the connecting surface of the oil path block, a low-pressure cavity, a high-pressure cavity, a reversing cavity and a high-low pressure switching cavity are formed in the valve seat assembly, the test oil inlet cavity, the oil inlet hole and the high-pressure cavity are communicated, the test signal cavity, the signal hole and the reversing cavity are communicated, the test oil return cavity, the oil return hole and the low-pressure cavity are communicated, and the test high-low pressure switching cavity, the high-low pressure switching oil hole and the high-low pressure switching cavity are communicated.

The signal hole, the oil inlet hole, the oil return hole and the high-low pressure switching oil hole which are formed through the oil path block are in one-to-one correspondence with the test signal cavity, the test oil inlet cavity, the test oil return cavity and the test high-low pressure switching cavity of the test breaking hammer respectively, the signal hole, the oil inlet hole, the oil return hole and the high-low pressure switching oil hole which are formed through the oil path block are all straight channels, the processing is very convenient, and the used fixture is greatly reduced. The oil circuit block still solves the problem of connection between the cylinder body in the test while not damaging the valve seat assembly, and the test breaking hammer can adapt to a plurality of oil circuit blocks, so that the test cost is greatly reduced. The working principle of the breaking hammer is utilized for testing, the testing process is not complex, and the operation is easy.

Further, the test breaking hammer is including the test front cylinder, test well cylinder body and the test back cylinder that connect gradually, installs the test piston in the test well cylinder body, set up test oil inlet chamber, test signal chamber, test oil return chamber and test high low pressure switching chamber in the test well cylinder body, the cylinder body lateral surface is provided with test inlet port and test oil inlet chamber intercommunication, test signal hole and test signal chamber intercommunication, test oil return hole and test oil return chamber intercommunication, test high low pressure switching hole and test high low pressure switching chamber intercommunication in the test.

According to the scheme, after the testing front cylinder, the testing middle cylinder body, the testing rear cylinder, the testing piston and the testing piston sleeve are assembled, the piston can do reciprocating motion in the testing front cylinder, the testing middle cylinder body and the testing rear cylinder, an oil duct of the breaking hammer is complex and difficult to process in the prior art, a plurality of tool clamps are needed to be matched to form a relevant oil duct, high accuracy is needed, and cost is high. According to the scheme, the test oil inlet hole, the test signal hole, the test oil return hole and the test high-low pressure switching hole are formed through being perpendicular to the outer side face of the test breaking hammer and are respectively communicated with the test oil inlet cavity, the test signal cavity, the test oil return cavity and the test high-low pressure switching cavity one by one, so that the oil duct arrangement of the test breaking hammer can be simplified, the duct distance is shortened, the duct is arranged in a vertical surface in-out mode, the processing is convenient, and the used fixture is greatly reduced. The main oil return path and the main oil inlet path are not required to be arranged on the test breaking hammer, so that the volume of the whole test breaking hammer can be reduced.

Further, the front side of the oil circuit block is provided with a side signal hole, a side oil inlet hole, a side oil return hole and a side high-low pressure switching oil hole, the side signal hole is communicated with the signal hole, the side oil inlet hole is communicated with the oil inlet hole, the side oil return hole is communicated with the oil return hole, the side high-low pressure switching oil hole is communicated with the high-low pressure switching oil hole, the side signal hole is communicated with the test signal hole through an oil pipe I, the side oil inlet hole is communicated with the test oil inlet hole through an oil pipe II, the side oil return hole is communicated with the test oil return hole through an oil pipe III, and the side high-low pressure switching oil hole is communicated with the test high-low pressure switching oil hole through an oil pipe IV.

The oil duct of this scheme sets up the comparison dispersion, thereby avoids the oil duct to concentrate to arrange and takes place to interfere the problem.

Further, the oil circuit block also be provided with signal pressure measurement hole, signal pressure measurement hole and signal hole intercommunication, signal pressure measurement hole external connection has signal pressure measurement ware.

According to the scheme, the signal pressure measuring hole is formed in the branch of the signal hole, the signal hole is used for controlling the reversing valve in the valve seat assembly, when the hole appearance of the signal hole is abnormal, the signal pressure measuring device can display that the problem of judging the valve seat assembly accurately is solved on the reversing valve, so that the problem of accurate judgment of a worker is solved, the interference of other equipment of the whole machine is avoided, and the test result is more accurate and reliable.

Further, the oil way block is also provided with an oil return pressure measuring hole, the oil return pressure measuring hole is communicated with the oil return hole, and the oil return pressure measuring hole is externally connected with an oil return pressure measuring device.

According to the scheme, the oil return pressure measuring hole is formed in the branch of the main oil return path, when oil return is problematic, the oil return pressure measuring device can display the oil, and the problem of the valve seat assembly can be accurately judged on the oil return path. So that the staff can accurately judge the problem. The interference of other equipment of the whole machine is avoided, and the test result is more accurate and reliable.

Furthermore, the oil circuit block also be provided with the regulation valve opening, regulation valve opening and oil return hole intercommunication, the external governing valve that has of regulation valve opening.

The regulating valve is arranged on the oil return path to play a role in frequency modulation, and can regulate the flow, pressure and liquid level of hydraulic oil.

Further, the valve seat assembly comprises a valve body, a valve core arranged in the valve body, a reversing valve arranged between the valve core and the valve body, one end of the valve body is connected with a valve cover, the inner peripheral surface of the valve body is sequentially provided with a low-pressure cavity, a high-pressure cavity and a reversing cavity at intervals along the circumferential direction of the valve body, the valve core is internally provided with the high-low pressure switching cavity, the middle part of the valve core is provided with an oil hole I communicated with the high-low pressure switching cavity, the reversing valve is provided with an oil hole II communicated with the high-pressure cavity and the oil hole I, an oil hole III communicated with the low-pressure cavity and the oil hole I, the lower part of the valve body is provided with an oil hole IV communicated with the high-low pressure switching cavity, an oil hole V communicated with the low-pressure cavity and an oil hole V communicated with the reversing cavity, the high-low pressure switching oil hole V is corresponding to the oil hole V, and the signal hole V corresponds to the oil hole V.

Further, the lower bottom surface of the valve body is abutted against the connecting surface, a first sealing groove, a second sealing groove, a third sealing groove and a fourth sealing groove with downward openings are respectively formed in the surrounding oil hole IV, the oil hole V, the oil hole VI and the oil hole V, the first sealing element is placed in the first sealing groove, the second sealing element is placed in the second sealing groove, the third sealing element is placed in the third sealing groove, the fourth sealing element is placed in the fourth sealing groove, the upper surface of the oil circuit block is a smooth plane, the upper surface of the oil circuit block is abutted against the lower surface of the valve body, and the front side and the rear side of the oil circuit block are fixedly connected with the valve body through fixing pieces.

According to the scheme, the connecting surface is in sealing connection with the lower bottom surface of the valve body in the valve seat assembly, the bottom surface of the valve body cannot be damaged, the first sealing groove, the second sealing groove, the third sealing groove and the fourth sealing groove with downward openings are respectively formed in the surrounding oil hole four, the oil hole five, the oil hole six and the oil hole seven, the first sealing part is placed in the first sealing groove, the second sealing part is placed in the second sealing groove, the third sealing part is placed in the third sealing groove, the fourth sealing part is placed in the fourth sealing groove, the sealing effect of an oil path block and the valve seat assembly can be achieved, the sealing performance of the valve seat assembly in normal operation after being installed on a hydraulic breaking hammer in operation can be detected, whether the valve seat meets the standard or not is judged, and the qualification rate of the valve seat assembly can be further improved.

Further, still include hydraulic work station, the oil circuit piece left surface still is provided with main oil return way and main oil feed way, main oil feed way and inlet port intercommunication, main oil return way and oil return hole intercommunication, hydraulic work station communicates through connecting oil pipe one and main oil feed way, through connecting oil pipe two and main oil return way intercommunication, the oil circuit piece left surface still be provided with signal pressure measurement hole, signal pressure measurement hole and signal hole intercommunication, signal pressure measurement hole external has signal pressure measurement ware, the oil circuit piece left surface still be provided with oil return pressure measurement hole, oil return pressure measurement hole is located main oil return way top, oil return pressure measurement hole and oil return hole intercommunication, oil return pressure measurement hole external has oil return pressure measurement ware. The left side face of the oil way block is also provided with an adjusting valve hole which is positioned between the oil return pressure measuring hole and the main oil return channel and communicated with the main oil return channel, and the adjusting valve hole is externally connected with an adjusting valve.

The hydraulic station provides power to the overall hydraulic system. The hydraulic working station and the oil path block are communicated with the oil inlet through the main oil inlet and the main oil return and the oil return, the oil pressure is supplied to the oil path block, the oil path block is communicated with the test breaking hammer, the oil pressure is supplied to the breaking hammer and the valve seat assembly, the working state of the valve seat assembly can be monitored through the oil inlet and the oil return, the main oil inlet, the oil return and pressure measurement holes, the signal pressure measurement holes and the regulating valve holes are arranged on the same left side surface, the oil paths are distributed in a relatively distributed mode, the interference problem caused by concentrated arrangement of the oil paths is avoided, and the signal pressure measurement device, the oil return and the regulating valve are installed in a sufficient space for convenient installation.

Compared with the prior art, the invention has the technical effects that:

the invention designs a breaking hammer valve seat assembly test workbench which can effectively judge whether the valve seat assembly normally operates.

The oil circuit block of this design plays the effect of connecting hydraulic pressure workstation, disk seat assembly and test quartering hammer. The oil holes and the oil return holes are communicated, and the oil holes of all the branches can monitor the working state of the valve seat assembly.

The hydraulic breaking hammer can measure the state of the valve seat assembly when the hydraulic breaking hammer works normally so as to judge whether the valve seat assembly accords with the standard or not and whether the hydraulic breaking hammer can work normally or not.

The design has the advantages of small volume and convenient and quick detection, can independently judge whether the valve seat assembly fails or not, avoids the interference of other equipment of the whole machine, and has accurate and reliable test result.

Drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is a cross-sectional view of the front cylinder under test, the rear cylinder under test and the test piston combination of the present invention.

Fig. 3 is a perspective view of an oil block of the present invention.

Fig. 4 is an exploded view of the oil block and valve seat assembly of the present invention.

FIG. 5 is a cross-sectional view of a valve seat assembly of the present invention.

Fig. 6 is a cross-sectional view of a valve body of the present invention.

FIG. 7 is an exploded view of the internal structure and components of the valve seat assembly of the present invention.

Fig. 8 is a schematic view of the hole connection of the present invention.

Fig. 9 is a schematic diagram of the present invention.

Fig. 10 is a schematic diagram of the present invention.

Fig. 11 is a schematic diagram of the present invention.

Drawing number marks: 0. testing a breaking hammer; 1. a test front cylinder; 2. a testing middle cylinder; 201. testing an oil inlet hole; 202. a test signal hole; 203. testing an oil return hole; 204. testing the high-low voltage switching hole; 3. a post test cylinder; 4. a test piston; 5. an oil path block; 5a, a connecting surface; 5b, front side; 5c, left side; 501. a signal hole; 502. an oil inlet hole; 503. an oil return hole; 504. high-low pressure switching oil holes; 505. a main oil return path; 506. a main oil inlet path; 507. a signal pressure measuring hole; 508. oil return pressure measuring hole; 509. regulating the valve hole; 511. a side signal hole; 512. a side oil inlet hole; 513. a side oil return hole; 514. a side high-low pressure switching oil hole; 6. a valve seat assembly; 61. a valve body; 611. oil holes IV; 612. an oil hole V; 613. an oil hole six; 614. an oil hole seven; 615. a first seal groove; 616. sealing grooves II; 617. sealing grooves III; 618. sealing grooves IV; 62. a valve core; 621. an oil hole I; 63. a reversing valve; 631. an oil hole II; 632. an oil hole III; 64. a valve cover; 7. a hydraulic work station; 8. an oil pipe I; 9. an oil pipe II; 10. an oil pipe III; 11. an oil pipe IV; 12. connecting an oil pipe I; 13. connecting a second oil pipe; 14. a signal pressure gauge; 15. an oil return pressure measurer; 16. a regulating valve; 17. a first sealing element; 18. a second sealing element; 19. a third sealing member; 20. a fourth sealing member; 21. a fixing member; v1, testing an oil inlet cavity; v2, testing a signal cavity; v3, testing an oil return cavity; v4, testing a high-low voltage switching cavity; v5, a low-pressure cavity; v6, a high-pressure cavity; v7, a reversing cavity; v8, high-low pressure conversion cavity.

Detailed Description

The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

As shown in FIG. 1, the breaking hammer valve seat assembly test workbench comprises a test breaking hammer 0 and an oil path block 5, wherein the oil path block 5 is in sealing connection with a valve seat assembly 6, and a plurality of test oil pipes are connected between the oil path block 5 and the test breaking hammer 0. The breaking hammer valve seat assembly test workbench further comprises a hydraulic working station 7, wherein the hydraulic working station 7 is communicated with the oil way block 5 through a first connecting oil pipe 12 and a second connecting oil pipe 13, and the hydraulic working station 7 provides power for the whole hydraulic system.

As shown in fig. 2, a test oil inlet cavity V1, a test signal cavity V2, a test oil return cavity V3 and a test high-low pressure switching cavity V4 are formed in the test breaking hammer 0, a test oil inlet hole 201 is communicated with the test oil inlet cavity V1, a test signal hole 202 is communicated with the test signal cavity V2, a test oil return hole 203 is communicated with the test oil return cavity V3, and a test high-low pressure switching hole 204 is communicated with the test high-low pressure switching cavity V4.

As shown in fig. 3, the oil path block 5 is provided with a connection surface 5a, the connection surface 5a is used for being in sealing connection with the valve seat assembly 6, the connection surface 5a of the oil path block 5 is provided with a signal hole 501, an oil inlet hole 502, an oil return hole 503 and a high-low pressure switching oil hole 504, a side signal hole 511, a side oil inlet hole 512, a side oil return hole 513 and a side high-low pressure switching oil hole 514 are formed in the front side surface 5b of the oil path block 5, the side signal hole 511 is communicated with the signal hole 501, the side oil inlet hole 512 is communicated with the oil inlet hole 502, the side oil return hole 513 is communicated with the oil return hole (503), the side high-low pressure switching oil hole 514 is communicated with the high-low pressure switching oil hole 504, the oil path block 5 is further provided with a signal pressure measuring hole 507, the signal pressure measuring hole 507 is communicated with the signal hole 501, and the signal pressure measuring device 14 is externally connected with the signal pressure measuring hole 507. The oil way block 5 is also provided with an oil return pressure measuring hole 508, the oil return pressure measuring hole 508 is communicated with the oil return hole 503, and the oil return pressure measuring hole 508 is externally connected with an oil return pressure measuring device 15. The oil path block 5 is also provided with an adjusting valve hole 509, the adjusting valve hole 509 is communicated with the oil return hole 503, and the adjusting valve hole 509 is externally connected with an adjusting valve 16. The left side surface 5c of the oil block 5 is further provided with a main oil return path 505 and a main oil inlet path 506, the main oil inlet path 506 is communicated with the oil inlet hole 502, and the main oil return path 505 is communicated with the oil return hole 503.

As shown in fig. 4 to 7, the valve seat assembly 6 includes a valve body 61, a valve core 62 disposed in the valve body 61, a reversing valve 63 disposed between the valve core 62 and the valve body 61, one end of the valve body 61 is connected with a valve cover 64, an inner peripheral surface of the valve body 61 is sequentially provided with a low pressure cavity V5, a high pressure cavity V6 and a reversing cavity V7 at intervals along a circumferential direction of the valve body 61, a high pressure and low pressure switching cavity V8 is disposed in the valve core 62, an oil hole one 621 communicating the high pressure cavity V8 is disposed in a middle portion of the valve core 62, the reversing valve 63 is provided with an oil hole two 631 capable of communicating the high pressure cavity V6 with the oil hole one 621, an oil hole three 632 capable of communicating the low pressure cavity V5 with the oil hole one 621, an oil hole four 611 communicating the high pressure and low pressure switching cavity V8, an oil hole six 613 communicating the low pressure cavity V5, an oil hole seven 614 communicating the reversing cavity V7 are disposed below the valve body 61, the high pressure switching cavity 504 corresponds to the four oil holes 611, the oil return hole (503) corresponds to the five oil holes 612, the oil inlet hole 502 corresponds to the six oil holes 613 and the seven signal corresponds to the seven oil holes 614.

As shown in fig. 1 to 8, the test breaking hammer, the oil path block, the valve seat assembly and the hydraulic working station are mutually communicated, a test oil inlet cavity V1, a test signal cavity V2, a test oil return cavity V3 and a test high-low pressure switching cavity V4 are formed in the test breaking hammer 0, a signal hole 501, an oil inlet hole 502, an oil return hole 503 and a high-low pressure switching oil hole 504 are formed in a connecting surface 5a of the oil path block 5, a low pressure cavity V5, a high pressure cavity V6, a reversing cavity V7 and a high-low pressure switching cavity V8 are formed in the valve seat assembly 6, the test oil inlet cavity V1, the oil inlet hole 502 and the high pressure cavity V6 are communicated, the test signal cavity V2, the signal hole 501 and the reversing cavity V7 are communicated, the test oil return cavity V3, the oil return hole 503 and the low pressure cavity V5 are communicated, and the test high-low pressure switching cavity V4, the high-low pressure switching oil hole 504 and the high-low pressure switching cavity V8 are communicated. In this embodiment, the oil pipe is connected with the oil hole through an oil pipe seat, and the oil pipe seat is a common oil pipe connection structure.

In this embodiment, the test breaking hammer 0 includes a test front cylinder 1, a test middle cylinder 2 and a test rear cylinder 3 which are sequentially connected, a test piston 4 capable of reciprocating is installed in the test middle cylinder 2, a test oil inlet cavity V1, a test signal cavity V2, a test oil return cavity V3 and a test high-low pressure switching cavity V4 are formed in the test middle cylinder 2, a test oil inlet hole 201 is formed in the outer side surface of the test middle cylinder 2 and communicated with the test oil inlet cavity V1, a test signal hole 202 is communicated with the test signal cavity V2, a test oil return hole 203 is communicated with the test oil return cavity V3, and a test high-low pressure switching hole 204 is communicated with the test high-low pressure switching cavity V4.

The connecting surface 5a of the oil path block 5 is provided with a signal hole 501, an oil inlet hole 502, an oil return hole 503 and a high-low pressure switching oil hole 504, the front side surface 5b of the oil path block 5 is provided with a side signal hole 511, a side oil inlet hole 512, a side oil return hole 513 and a side high-low pressure switching oil hole 514, the side signal hole 511 is communicated with the signal hole 501, the side oil inlet hole 512 is communicated with the oil inlet hole 502, the side oil return hole 513 is communicated with the oil return hole 503, the side high-low pressure switching oil hole 514 is communicated with the high-low pressure switching oil hole 504, the left side surface 5c of the oil path block 5 is further provided with a main oil return path 505 and a main oil inlet path 506, the main oil inlet path (506) is communicated with the oil inlet hole 502, and the main oil return path 505 is communicated with the oil return hole (503). The hydraulic working station 7 is communicated with the main oil inlet channel 506 through the first connecting oil pipe 12 and is communicated with the main oil return channel 505 through the second connecting oil pipe 13.

The inner peripheral surface of the valve body 61 in the valve seat assembly 6 is sequentially provided with a low-pressure cavity V5, a high-pressure cavity V6 and a reversing cavity V7 at intervals along the circumferential direction of the valve body 61, a high-low pressure switching cavity V8 is arranged in the valve core 62, an oil hole IV 611 communicated with the high-low pressure switching cavity V8, an oil hole V612 communicated with the low-pressure cavity V5, an oil hole VI 613 communicated with the high-pressure cavity V6 and an oil hole seven 614 communicated with the reversing cavity V7 are arranged below the valve body 61, the high-low pressure switching oil hole 504 corresponds to the oil hole IV 611, the oil return hole 503 corresponds to the oil hole V612, the oil inlet 502 corresponds to the oil hole VI, and the signal hole 501 corresponds to the oil hole seven 614.

The side signal hole 511 is communicated with the test signal hole 202 through the first oil pipe 8, the side oil inlet hole 512 is communicated with the test oil inlet hole 201 through the second oil pipe 9, the side oil return hole 513 is communicated with the test oil return hole 203 through the third oil pipe 10, and the side high-low pressure switching oil hole 514 is communicated with the test high-low pressure switching hole 204 through the fourth oil pipe 11.

In this embodiment, the lower bottom surface of the valve body 61 is in contact with the connection surface 5a, and a first seal groove 615, a second seal groove 616, a third seal groove 617 and a fourth seal groove 618 with downward openings are respectively formed around the fourth oil hole 611, the fifth oil hole 612, the sixth oil hole 613 and the seventh oil hole 614, a first seal member 17 is placed in the first seal groove 615, a second seal member 18 is placed in the second seal groove 616, a third seal member 19 is placed in the third seal groove 617, a fourth seal member 20 is placed in the fourth seal groove 618, the upper surface of the oil block 5 is a smooth plane, the upper surface of the oil block 5 is in contact with the lower surface of the valve body 61, and the front side and the rear side of the oil block 5 are fixedly connected with the valve body 61 through fixing members 21.

In this embodiment, the left side 5c of the oil path block 5 is further provided with a signal pressure measuring hole 507, the signal pressure measuring hole 507 is communicated with the signal hole 501, the signal pressure measuring hole 507 is externally connected with a signal pressure measuring device 14, the left side 5c of the oil path block 5 is further provided with an oil return pressure measuring hole 508, the oil return pressure measuring hole 508 is located above the main oil return path 505, the oil return pressure measuring hole 508 is communicated with the oil return hole 503, and the oil return pressure measuring hole 508 is externally connected with an oil return pressure measuring device 15. The left side surface 5c of the oil path block 5 is also provided with an adjusting valve hole 509, which is positioned between and communicated with the oil return pressure measuring hole 508 and the main oil return 505, and the adjusting valve hole 509 is externally connected with an adjusting valve 16.

The working principle is as shown in figures 9-11:

backhaul acceleration phase: when the return stroke of the test piston 4 starts, the last impact of the test piston 4 is finished and the test piston is in an instant stop state. As shown in fig. 9, the reversing valve 63 is located at the lowermost end of the valve body 62 at this time, and the test oil intake chamber V1 is always in communication with the high pressure chamber V6 and communicates high pressure oil. The test high-low pressure switching cavity V4 is always communicated with the high-low pressure switching cavity V8 through the oil hole IV 611, the high-low pressure switching cavity V8 at the moment is communicated with the test oil return cavity V3 through the oil hole III 632 in the reversing valve 63, the test high-low pressure switching cavity V4 is changed into low pressure, and the test piston 4 performs return stroke acceleration motion under the action of high pressure oil in the test oil inlet cavity V1.

Return braking movement: the test piston 4 continues to move upwards in a return motion under the action of high-pressure oil in the test oil inlet cavity V1, when the lower side surface of the middle section of the test piston 4 passes through the lower side wall of the test signal cavity V2, as shown in FIG. 10, the test signal cavity V2 is communicated with the test oil inlet cavity V1, the high-pressure oil in the test oil inlet cavity V1 enters the reversing cavity V7 through the test signal cavity V2, the pressure of hydraulic oil in the reversing cavity V7 is greater than that in the low-pressure cavity V5, the reversing valve 63 is forced to start reversing motion, the hydraulic oil in the reversing cavity V7 pushes the reversing valve 63 to move upwards, and the channels of the test high-pressure switching cavity V4 and the low-pressure cavity V5 are cut off in the process that the reversing valve 63 moves upwards.

The high-pressure oil entering the test oil inlet chamber V1 gradually decreases, and thus the return thrust acting on the test piston 4 gradually decreases, the test piston 4 shifts to the return braking stage, the reversing valve 63 finally cuts off the hydraulic oil entering the test oil inlet chamber V1, and the test piston 4 will stop the return motion very quickly.

Stroke acceleration phase: when the test piston 4 stops the return movement, the stroke movement stage is immediately shifted to, as shown in fig. 11, the reversing valve 63 is stopped at the position most above, the high-low pressure switching chamber V8 of the reversing valve 63 is communicated with the high pressure chamber V6 through the first oil hole 621 and the second oil hole 631 and then is communicated with the test oil inlet chamber V1, high pressure oil in the test oil inlet chamber V1 can enter the high-low pressure switching chamber V8, the test high-low pressure switching chamber V4 is communicated with the high-low pressure switching chamber V8, and the test high-low pressure switching chamber V4 is communicated with the test oil inlet chamber V1. The stress area of the test high-low pressure switching cavity V4 is larger than that of the test oil inlet cavity V1, the piston is subjected to downward acting force, and the piston rapidly moves downward.

Special states: the test piston 4 performs acceleration movement, when the upper side surface of the middle section of the test piston 4 passes over the upper side wall of the test signal cavity V2, the test signal cavity V2 is communicated with the test oil return cavity V3, the oil pressure in the test signal cavity V2 is reduced, the reversing valve 63 moves downwards under the action of high-pressure oil in the high-pressure cavity V6, the test piston 4 has obtained enough energy to strike the drill rod to complete impact action, when the reversing valve 63 moves downwards to a limit position, the test piston 4 is in an instant pause state, the test piston 4 ends a working cycle, then the test piston 4 rebounds after impact, and the next working cycle begins.

The reversing valve controls the connection, cutting off and direction change of an oil way, the reversing valve can normally work to realize normal striking work of the breaking hammer, and whether the reversing valve normally works can be well detected through the breaking hammer valve seat assembly test workbench. And can also effectively judge whether the valve seat assembly is operating normally. The oil circuit block of this design plays the effect of connecting hydraulic pressure workstation, disk seat assembly and test quartering hammer. The oil holes and the oil return holes are communicated, and the oil holes of all the branches can monitor the working state of the valve seat assembly. The hydraulic breaking hammer can measure the state of the valve seat assembly when the hydraulic breaking hammer works normally so as to judge whether the valve seat assembly accords with the standard or not and whether the hydraulic breaking hammer can work normally or not. The design has the advantages of small volume and convenient and quick detection, can independently judge whether the valve seat assembly fails or not, avoids the interference of other equipment of the whole machine, and has accurate and reliable test result.

The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention in this way, therefore: all equivalent changes in structure, shape and principle of the invention should be covered by the protection scope defined by the claims.

Claims (10)

1. The utility model provides a quartering hammer disk seat assembly test bench which characterized in that: including test quartering hammer (0) and oil circuit piece (5), be equipped with on oil circuit piece (5) and connect face (5 a), connect face (5 a) be used for with disk seat assembly (6) sealing connection, be connected with a plurality of test oil pipes between oil circuit piece (5) and test quartering hammer (0).

2. The breaking hammer valve seat assembly test bench according to claim 1, wherein: test oil inlet chamber (V1), test signal chamber (V2), test return oil chamber (V3) and test high-low pressure switching chamber (V4) have been seted up in test quartering hammer (0), connection face (5 a) of oil circuit block (5) on seted up signal hole (501), inlet port (502), oil return hole (503) and high-low pressure switching oilhole (504), be provided with low pressure chamber (V5), high-pressure chamber (V6) and switching-over chamber (V7) and high-low pressure switching chamber (V8) in disk seat assembly (6), test oil inlet chamber (V1), inlet port (502) and high-pressure chamber (V6) intercommunication, test signal chamber (V2), signal hole (501) and switching-over chamber (V7) intercommunication, test return oil chamber (V3), oil return hole (503) and low pressure chamber (V5) intercommunication, test high-low pressure switching-over chamber (V4), high-low pressure switching-over oilhole (504) and high-low pressure switching-over chamber (V8) intercommunication.

3. The breaking hammer valve seat assembly test bench according to claim 2, wherein: the test breaking hammer (0) comprises a test front cylinder (1), a test middle cylinder body (2) and a test rear cylinder (3) which are sequentially connected, wherein a test piston (4) is arranged in the test middle cylinder body (2), a test oil inlet cavity (V1), a test signal cavity (V2), a test oil return cavity (V3) and a test high-low pressure switching cavity (V4) are formed in the test middle cylinder body (2), a test oil inlet hole (201) is formed in the outer side surface of the test middle cylinder body (2) and is communicated with the test oil inlet cavity (V1), a test signal hole (202) is communicated with the test signal cavity (V2), a test oil return hole (203) is communicated with the test oil return cavity (V3), and a test high-low pressure switching hole (204) is communicated with the test high-low pressure switching cavity (V4).

4. A breaking hammer valve seat assembly test bench according to claim 3, wherein: the oil circuit block is characterized in that a side signal hole (511), a side oil inlet hole (512), a side oil return hole (513) and a side high-low pressure switching oil hole (514) are formed in the front side surface (5 b) of the oil circuit block (5), the side signal hole (511) is communicated with the signal hole (501), the side oil inlet hole (512) is communicated with the oil inlet hole (502), the side oil return hole (513) is communicated with the oil return hole (503), the side high-low pressure switching oil hole (514) is communicated with the high-low pressure switching oil hole (504), the side signal hole (511) is communicated with the test signal hole (202) through an oil pipe I (8), the side oil inlet hole (512) is communicated with the test oil inlet hole (201) through an oil pipe II (9), the side oil return hole (513) is communicated with the test oil return hole (203) through an oil pipe III (10), and the side high-low pressure switching oil hole (514) is communicated with the test high-low pressure switching oil hole (204) through an oil pipe IV (11).

5. The breaking hammer valve seat assembly test bench according to claim 4, wherein: the oil circuit block (5) is also provided with a signal pressure measuring hole (507), the signal pressure measuring hole (507) is communicated with the signal hole (501), and the signal pressure measuring hole (507) is externally connected with a signal pressure measuring device (14).

6. The breaking hammer valve seat assembly test bench according to claim 4, wherein: the oil way block (5) is also provided with an oil return pressure measuring hole (508), the oil return pressure measuring hole (508) is communicated with the oil return hole (503), and the oil return pressure measuring hole (508) is externally connected with an oil return pressure measuring device (15).

7. The breaking hammer valve seat assembly test bench according to claim 4, wherein: the oil way block (5) is also provided with an adjusting valve hole (509), the adjusting valve hole (509) is communicated with the oil return hole (503), and the adjusting valve hole (509) is externally connected with an adjusting valve (16).

8. The breaking hammer valve seat assembly test bench according to claim 2, wherein: the valve seat assembly (6) comprises a valve body (61), a valve core (62) arranged in the valve body (61), a reversing valve (63) arranged between the valve core (62) and the valve body (61), wherein one end of the valve body (61) is connected with a valve cover (64), the inner peripheral surface of the valve body (61) is sequentially provided with a low-pressure cavity (V5), a high-pressure cavity (V6) and a reversing cavity (V7) at intervals along the circumferential direction of the valve body (61), the valve core (62) is internally provided with the high-pressure and low-pressure switching cavity (V8), the middle part of the valve core (62) is provided with an oil hole I (621) communicated with the high-pressure cavity (V8), the reversing valve (63) is provided with an oil hole II (631) capable of communicating the high-pressure cavity (V6) with the oil hole I (621), an oil hole III (632) capable of communicating the low-pressure cavity (V5) with the oil hole I (621), five oil holes (612) communicated with the high-pressure cavity (V6) are sequentially arranged below the valve body (61), six oil holes (613) communicated with the high-pressure cavity (V6) are correspondingly communicated with the oil hole III (612) and the oil hole (502) corresponding to the oil hole III (502), the signal hole (501) corresponds to the oil hole seven (614).

9. The breaking hammer valve seat assembly test bench of claim 8, wherein: the bottom surface is inconsistent with connection face (5 a) under valve body (61), encircles oilhole IV (611), oilhole V (612), oilhole V (613) and oilhole V (614) and has offered down seal groove I (615), seal groove II (616), seal groove III (617) and seal groove IV (618) respectively, places sealing member I (17) in seal groove I (615), places sealing member II (18) in seal groove II (616), places sealing member III (19) in seal groove III (617), places sealing member IV (20) in seal groove IV (618), the higher authority of oil circuit block (5) is smooth plane, the higher authority of oil circuit block (5) is contradicted below valve body (61), both sides pass through mounting (21) fixed connection around oil circuit block (5) and valve body (61).

10. The breaking hammer valve seat assembly test bench according to any of claims 1-9, wherein: still include hydraulic pressure work station (7), oil circuit piece (5) left surface (5 c) still is provided with main oil return path (505) and main oil feed path (506), main oil feed path (506) and inlet (502) intercommunication, main oil return path (505) and oil return hole (503) intercommunication, hydraulic pressure work station (7) are through connecting oil pipe one (12) and main oil feed path (506) intercommunication, through connecting oil pipe two (13) and main oil return path (505) intercommunication, oil circuit piece (5) left surface (5 c) still be provided with signal pressure measurement hole (507), signal pressure measurement hole (507) and signal hole (501) intercommunication, signal pressure measurement hole (507) external signal pressure gauge (14), oil circuit piece (5) left surface (5 c) still be provided with pressure measurement oil return hole (508), oil return hole (508) are located main oil return path (505) top, oil return hole (508) and oil return hole (503) intercommunication, oil return hole (508) external connection has oil return ware (15). The left side face (5 c) of the oil way block (5) is also provided with an adjusting valve hole (509), the adjusting valve hole (509) is positioned between the oil return pressure measuring hole (508) and the main oil return channel (505) and is communicated with the main oil return channel, and the adjusting valve hole (509) is externally connected with an adjusting valve (16).