A pressure relief device for pressure control of a six-sided top press

Abstract

The present invention discloses a pressure relief device for pressure control of a six-sided top press in the technical field of top presses, comprising a hinge beam and a hydraulic pipeline. The six-sided top press is assembled and combined by six hinge beams, and each hinge beam is equipped with a hydraulic pipeline. The hydraulic pipeline includes an oil supply pipeline, a pressure relief pipeline and an energy release pipeline. A cylinder bottom is installed at the bottom of the cylinder body of the hinge beam, a working cylinder is arranged on the outside of the cylinder bottom, a guide sleeve is arranged on the upper part of the working cylinder, and an oil filling hole is arranged on the outside of the guide sleeve. The present invention connects an energy release pipe oil circuit with a smaller inner diameter in parallel to the pressure relief pipeline arranged at the lower pipe joint at the bottom of the hinge beam, which can realize slight adjustment of the oil pressure inside the cylinder diameter and perform dynamic energy release. The pressure relief oil circuit is used during pressure relief, and the dynamic energy release oil circuit is used during dynamic adjustment control. The pipeline flux diameter of the energy release pipe is 1 / 5-1 / 10 of the flux diameter of the main pressure relief pipe, so that the oil cylinder energy release has a good pressure regulation effect.

Description

Technical Field

[0001] The invention belongs to the technical field of top presses, and in particular relates to a pressure relief device for pressure control of a six-sided top press. Background Art

[0002] Synthetic diamond refers to diamond materials synthesized through artificial methods. Compared to natural diamond, synthetic diamond offers advantages such as low cost and high controllability, demonstrating enormous potential in industrial applications. Since its first successful synthesis in the 1950s, synthetic diamond technology has experienced rapid development and has now become a key material in a variety of fields, including high-performance tools, precision machining, and semiconductor devices. During the synthetic diamond synthesis process, pressure control plays a crucial role in determining the synthesis results. Currently, the main synthetic diamond synthesis equipment is a six-sided top press. This press primarily uses a booster or ultra-high-pressure oil pump to raise the system pressure to 100 MPa, which drives six working cylinders to perform the pressing operation. After the pressing process is complete, the lower chamber of the booster or ultra-high-pressure oil pump must be depressurized. The depressurization process begins at 100 MPa and ends at 6 MPa. When the pressure drops below 6 MPa, the depressurization process is complete and the press returns to its return stroke.

[0003] In order to control the oil pressure in the hinge beam cylinder, the six-sided jacking press is usually equipped with a pressure relief pipeline. In order to achieve a good pressure relief effect, the diameter of the pressure relief oil pipeline is usually large, and the dynamic pressure replenishment and pressure relief speed is fast. However, for the operation process of pressure stabilization and fine-tuning, since the pressure relief pressure of the pressure relief valve cannot be adjusted casually during operation after it is set, it is difficult to fine-tune the pressure. At the same time, the existing pipe joints have a simple structure and are only used for connection between pipes. They cannot effectively buffer the oil pressure in the pipes, and the rapid increase in oil pressure has a greater impact on the pipe joints.

[0004] In view of this, the present invention is proposed. Utility Model Content

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a pressure relief device for pressure control of a six-sided top press. To solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0006] and a tube connecting the dischar e side of the pump with a plug in the forward end of the crank case, said tube having a check valve in it at the pump end, and said former tube which connects the pump to the oil drain plug, which has a check valve in it at the pump end. The pump is closed by a screw bolt, and said former tube which connects the pump to the oil drain plug, and said former tube which connects the pump to the oil drain plug. The oil outlet interface is connected, and a pressure relief pipeline is connected at the lower oil supply pipe. The pressure relief pipeline includes two parallel pipelines, one of which is equipped with a solenoid valve 1, and the other is equipped with a solenoid valve 2 and an overflow pressure reducing valve. At the same time, the pressure relief pipeline is also provided with an energy release pipeline in parallel, and an energy release solenoid valve is installed on the energy release pipe of the energy release pipeline. A pressure relay is connected to the outside of the pressure relief pipeline. The liquid outlet ends of the pressure relief pipeline and the energy release pipeline are connected to the cooler, and the cooler is connected to the return oil filter through a pipeline. The liquid outlet end of the return oil filter extends into the oil tank. A mounting hole is provided at the upper end of the plug, and the mounting hole is a stepped hole structure. A flow control core is provided in the mounting hole, and a guide hole is provided in the flow control core. A guide cone hole is provided at the upper end of the guide hole. The side pipe joint has the same structure as the lower pipe joint. A valve core is provided at the upper position of the side pipe joint, and an oil inlet buffer mesh plate is provided at the lower position.

[0007] As a further solution of the present invention: the guide hole is a tapered hole structure with a larger upper part and a smaller lower part, a filling hole is provided at the center position of the plug, the lower end diameter of the guide hole is the same as the diameter of the filling hole, the upper end diameter of the guide hole is the same as the lower end diameter of the guide cone hole, and the taper of the guide cone hole is greater than the taper of the guide hole, ensuring smooth filling and diversion.

[0008] As a further solution of the present invention: the valve core is connected to the main body of the side pipe joint through a fine thread, and a plurality of sealing grooves are provided on the thread outer diameter of the valve core. A second sealing ring is installed in the sealing groove, and a sealing outer conical surface is provided on the outer side of the second sealing ring. The sealing outer conical surface has a structure that is larger at the top and smaller at the bottom, which will not affect the threaded connection and can enhance the sealing performance of the threaded connection.

[0009] As a further solution of the present invention: an oil hole is provided at the center position of the valve core, and a plug-in groove is opened on the upper plane of the valve core. The plug-in groove is a rectangular groove structure, and there are multiple plug-in grooves. The plug-in groove is used to cooperate with a U-shaped tool to realize the rapid disassembly, assembly and replacement of the valve core.

[0010] As a further solution of the present invention: a connecting guide rod is fixedly provided on the top surface of the outer frame of the oil inlet buffer mesh plate, a connecting guide sleeve is installed on the outer side of the connecting guide rod, the upper end of the connecting guide sleeve is fixedly connected to the bottom surface of the connecting ring, a telescopic spring is provided on the outer side of the connecting guide sleeve and the connecting guide rod, the upper end of the telescopic spring is fixedly connected to the connecting ring, the lower end of the telescopic spring is fixedly connected to the outer frame of the oil inlet buffer mesh plate, and the middle part of the oil inlet buffer mesh plate is a mesh plate structure for buffering high-pressure oil.

[0011] As a further solution of the present invention: the oil inlet buffer mesh plate is a circular structure, and the connecting guide rods and the connecting guide sleeves are provided in multiple groups, which are evenly distributed in squares along the circumference on the oil inlet buffer mesh plate, and a limited support ring is provided on the outer side of the oil inlet buffer mesh plate to enhance the stability of the installation of the oil inlet buffer mesh plate.

[0012] As a further solution of the present invention: the diameter of the main pressure relief pipe of the two parallel pressure relief pipes is larger than the diameter of the energy release pipe, the pipeline flux diameter of the energy release pipe is 1 / 5-1 / 10 of the flux diameter of the main pressure relief pipe, the pipeline between the electromagnetic reversing valve and the liquid suction pump extends outward and is equipped with a pressure gauge, and an overflow valve is installed on the pipeline between the pressure relief pipeline and the main oil inlet joint of the electromagnetic reversing valve.

[0013] As a further solution of the present invention: an oil suction filter is provided in the oil tank, the oil outlet end of the oil suction filter is connected to the liquid inlet end of the liquid suction pump, and a drain port is provided on the side of the oil tank to facilitate the discharge of oil in the oil tank.

[0014] As a further solution of the present invention: a matching installation groove is provided on the bottom surface of the cylinder bottom, a limit platform adapted to the matching installation groove is provided on the outer side of the plug, a double sealing groove structure is provided at the matching position of the cylinder bottom and the working cylinder, a piston is installed in the working cylinder, and a sealing ring is provided between the piston and the working cylinder to ensure the matching sealing between the piston and the working cylinder.

[0015] As a further solution of the present invention: a limiting ring is provided above the guide sleeve, a limiting nut is provided above the limiting ring, and an upper pad is fixedly installed at the middle position of the piston.

[0016] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0017] The present invention connects an energy release oil circuit with a smaller inner diameter in parallel to the pressure relief pipeline provided at the lower pipe joint at the bottom of the hinge beam, which can achieve slight adjustment of the oil pressure inside the cylinder diameter and perform dynamic energy release. The pressure relief oil circuit is used for pressure relief, and the dynamic energy release oil circuit is used for dynamic adjustment control. The pipeline flux diameter of the energy release pipe is 1 / 5-1 / 10 of the flux diameter of the main pressure relief pipe, so that the cylinder energy release has a good pressure regulation effect.

[0018] The liquid outlet ends of the side pipe joint and the lower pipe joint of the present invention are both installed with valve cores through threaded connection. An oil hole is provided at the center of the valve core. The oil inlet amount is controlled by the valve core and the oil hole. The valve core is provided with oil holes of different sizes and specifications. The valve core with oil holes of appropriate specifications is selected according to the assembly and use requirements. The valve core and the pipe joint are connected by fine thread. In order to ensure the sealing of the connection, a plurality of sealing grooves are provided on the outer wall of the valve core. A sealing ring 2 is installed in the sealing groove. A sealing outer cone surface is provided on the outer side of the sealing ring 2, which can not only ensure the threaded connection, but also improve the sealing of the fit. At the same time, an oil inlet buffer mesh plate is provided at the lower part of the pipe joint, which can effectively buffer the oil pressure, protect the pipe joint, and increase the service life of the pipe joint.

[0019] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are part of this application and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive effort. In the accompanying drawings:

[0021] Figure 1 is a schematic diagram of the present invention;

[0022] Figure 2 This is a partial enlarged view of point A of the present invention;

[0023] Figure 3 It is a partial pipeline connection diagram of the present invention;

[0024] Figure 4 This is a schematic diagram of the interior of the pipe joint of the present invention;

[0025] Figure 5 It is a schematic diagram of the valve core of the present invention;

[0026] Figure 6 This is a partial enlarged view of point B of the present invention;

[0027] Figure 7A top view of the valve core of the present invention;

[0028] Figure 8 It is the pressure regulation curve diagram of the present invention.

[0029] Figure: 1. Hinge beam; 2. Working cylinder; 3. Cylinder bottom; 4. Piston; 5. Sealing ring 1; 6. Guide sleeve; 7. Limiting ring; 8. Limiting nut; 9. Upper spacer; 10. Oil filling hole; 11. Side pipe joint; 12. Plug; 13. Sealing connector; 14. Lower pipe joint; 15. Vent plug; 16. Oil tank; 17. Oil suction filter; 18. Liquid pump; 19. Pressure gauge; 20. Solenoid reversing valve; 21. Side oil supply pipe; 22. Lower oil supply pipe; 23. Cooler; 24. Overflow valve; 25. Oil return filter; 26. Solenoid valve 1 ; 27. Electromagnetic overflow pressure reducing valve; 28. Solenoid valve 2; 29. ​​Energy release solenoid valve; 30. Pressure relay; 31. Limit platform; 32. Matching installation groove; 33. Flow control core; 34. Filling hole; 35. Guide hole; 36. Guide cone hole; 37. Main pressure relief pipe; 38. Energy release pipe; 39. Valve core; 40. Sealing ring 2; 41. Oil hole; 42. Plug-in slot; 43. Oil inlet buffer mesh plate; 44. Limit support ring; 45. Sealing outer cone; 46. Connecting guide rod; 47. Connecting guide sleeve; 48. Telescopic spring; 49. Connecting ring.

[0030] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0032] like Figures 1 to 8As shown, a pressure relief device for pressure control of a six-sided top press includes a hinge beam 1 and a hydraulic pipeline. The six-sided constant press is assembled by six hinge beams 1. Each hinge beam 1 is equipped with a hydraulic pipeline. The hydraulic pipeline includes an oil supply pipeline, a pressure relief pipeline and an energy release pipeline. The bottom of the cylinder body of the hinge beam 1 is installed with a cylinder bottom 3. The outside of the cylinder bottom 3 is provided with a working cylinder 2. The upper part of the working cylinder 2 is provided with a guide sleeve 6. The outside of the guide sleeve 6 is provided with an oil injection hole 10. The outside of the oil injection hole 10 is provided with a side pipe. The bottom hole of the hinge beam 1 is provided with a plug 12, and the lower end of the plug 12 is provided with a sealing connection seat 13. A lower pipe joint 14 is provided on one side of the sealing connection seat 13, and a vent plug 15 is provided on the other side. The side pipe joint 11 is connected to one of the oil outlet interfaces of the electromagnetic reversing valve 20 through the side oil supply pipe 21. One oil inlet end of the electromagnetic reversing valve 20 is connected to the liquid pump 18 through a pipeline. The lower pipe joint 14 is connected to the other oil outlet interface of the electromagnetic reversing valve 20 through the lower oil supply pipe 22. The port is connected, and a pressure relief pipeline is connected at the lower oil supply pipe 22. The pressure relief pipeline includes two parallel pipelines, one of which is equipped with a solenoid valve 1 26, and the other is equipped with a solenoid valve 28 and a relief pressure reducing valve. At the same time, the pressure relief pipeline is also provided with an energy release pipeline in parallel, and an energy release solenoid valve 29 is installed on the energy release pipe 38 of the energy release pipeline. A pressure relay 30 is provided on the outside of the pressure relief pipeline. The liquid outlet ends of the pressure relief pipeline and the energy release pipeline are connected to the cooler 23, and the cooler 23 is connected to the cooler 23. The pipe is connected to the return oil filter 25, and the liquid outlet end of the return oil filter 25 extends into the oil tank 16. The upper end of the plug 12 is provided with a mounting hole, and the mounting hole is a stepped hole structure. A flow control core 33 is provided in the mounting hole, and a guide hole 35 is provided in the flow control core 33. The upper end of the guide hole 35 is provided with a guide cone hole 36. The side pipe joint 11 has the same structure as the lower pipe joint 14. A valve core 39 is provided at the upper position of the side pipe joint 11, and an oil inlet buffer mesh plate 43 is provided at the lower position.

[0033] Among them, the guide hole 35 is a tapered hole structure with a larger upper part and a smaller lower part. A filling hole 34 is provided at the center position of the plug 12. The lower end diameter of the guide hole 35 is the same as the diameter of the filling hole 34. The upper end diameter of the guide hole 35 is the same as the lower end diameter of the guide cone hole 36. The taper of the guide cone hole 36 is greater than the taper of the guide hole 35, ensuring smooth filling and diversion.

[0034] The valve core 39 is connected to the main body of the side pipe joint 11 through a fine thread. A plurality of sealing grooves are provided on the outer diameter of the thread of the valve core 39. A sealing ring 2 40 is installed in the sealing groove. A sealing outer conical surface 45 is provided on the outer side of the sealing ring 2 40. The sealing outer conical surface 45 has a structure with a larger upper portion and a smaller lower portion, which will not affect the threaded connection and can enhance the sealing performance of the threaded connection.

[0035] An oil hole 41 is provided at the center of the valve core 39, and a plug-in groove 42 is provided on the upper plane of the valve core 39. The plug-in groove 42 is a rectangular groove structure, and there are multiple plug-in grooves 42. The plug-in groove 42 is used to cooperate with a U-shaped tool to realize the rapid disassembly, assembly and replacement of the valve core 39.

[0036] A connecting guide rod 46 is fixedly provided on the top surface of the outer frame of the oil inlet buffer mesh plate 43, and a connecting guide sleeve 47 is installed on the outer side of the connecting guide rod 46. The upper end of the connecting guide sleeve 47 is fixedly connected to the bottom surface of the connecting ring 49, and a telescopic spring 48 is provided on the outer side of the connecting guide sleeve 47 and the connecting guide rod 46. The upper end of the telescopic spring 48 is fixedly connected to the connecting ring 49, and the lower end of the telescopic spring 48 is fixedly connected to the outer frame of the oil inlet buffer mesh plate 43. The middle part of the oil inlet buffer mesh plate 43 is a mesh structure for buffering high-pressure oil.

[0037] The oil inlet buffer mesh plate 43 is a circular structure, and multiple groups of connecting guide rods 46 and connecting guide sleeves 47 are provided, which are evenly distributed in squares along the circumference on the oil inlet buffer mesh plate 43. A limited support ring 44 is provided on the outer side of the oil inlet buffer mesh plate 43 to enhance the stability of the installation of the oil inlet buffer mesh plate 43.

[0038] The diameter of the main pressure relief pipe 37 of the two parallel pressure relief pipes is larger than the diameter of the energy release pipe 38. The pipeline flux diameter of the energy release pipe 38 is 1 / 5-1 / 10 of the flux diameter of the main pressure relief pipe 37. The pipeline between the electromagnetic reversing valve 20 and the liquid suction pump 18 extends outward and is installed with a pressure gauge 19. The pipeline between the pressure relief pipe and the main oil inlet joint of the electromagnetic reversing valve 20 is installed with an overflow valve 24.

[0039] An oil suction filter 17 is provided in the oil tank 16 , and the oil outlet of the oil suction filter 17 is connected to the liquid inlet of the liquid pump 18 . A drain port is provided on the side of the oil tank 16 to facilitate the discharge of the oil in the oil tank 16 .

[0040] A matching installation groove 32 is provided on the bottom surface of the cylinder bottom 3, and a limit platform 31 adapted to the matching installation groove 32 is provided on the outer side of the plug 12. A double sealing groove structure is provided at the matching position of the cylinder bottom 3 and the working cylinder 2. A piston 4 is installed in the working cylinder 2, and a sealing ring 5 is provided between the piston 4 and the working cylinder 2 to ensure the matching sealing between the piston 4 and the working cylinder 2.

[0041] A limiting ring 7 is provided above the guide sleeve 6 , a limiting nut 8 is provided above the limiting ring 7 , and an upper pad 9 is fixedly installed at the middle position of the piston 4 .

[0042] The working principle of the present invention is as follows: when the six-sided top press is operating normally, it is assembled and connected to the pipelines. The oil inlet and exhaust rates are determined according to the model, material and designed pressure bearing capacity of the hinge beam 1. The appropriate side pipe joint 11 and lower pipe joint 14 are selected according to the technical basic indicators. The valve core 39 with the appropriate oil hole 41 specifications that are compatible with the pipe joints is selected. The side pipe joint 11 and the lower pipe joint 14 are respectively sealed and connected to the corresponding pipes in the oil circuit.

[0043] During the oil supply process, the liquid extraction pump 18 extracts the oil in the oil tank 16. During the extraction process, the oil is filtered by the oil suction filter 17 to prevent impurities in the oil from clogging the pipeline and affecting the working process of the top press. The oil is supplied to the side pipe joint 11 through the electromagnetic reversing valve 20 and the side oil supply pipe 21, and enters the knife oil filling hole 10. Under the action of oil pressure, the piston 4 moves relative to the cylinder body of the hinge beam 1; another passage of the electromagnetic reversing valve 20 is used to supply the oil extracted by the liquid extraction pump 18 to the lower oil supply pipe 22. A one-way valve is installed on the lower oil supply pipe 22. The lower oil supply pipe 22 can only supply oil to the lower pipe joint 14 and cannot relieve pressure. A dedicated pressure relief official is provided. There are two pressure relief pipelines. One pipeline is installed with a solenoid valve 26, and the other pipeline is installed with a solenoid valve 28 and an electromagnetic overflow pressure reducing valve 27. The two pipelines are connected in parallel. The two pressure relief pipelines connected in parallel can effectively adjust the pressure relief state. The two pressure relief pipelines use the main pressure relief pipe 37. An energy release pipe 38 is arranged in parallel at the two pressure relief pipes. An energy release solenoid valve 29 is installed on the energy release pipe 38. The diameter of the energy release pipe 38 is smaller than the diameter of the main pressure relief pipe 37. The flux diameter of the energy release pipe 38 is 1 / 5-1 / 10 of the flux diameter of the main pressure relief pipe 37, so that the oil cylinder energy release has a good pressure regulation effect. The pressure relief curve and the energy release curve are shown in the attached Figure 8 ;

[0044] The oil that has passed through the pressure relief pipe or the energy release pipe is then returned to the oil tank 16 for recycling after being processed in the cold zone of the cooler 23 and filtered by the return oil filter 25, ensuring that the oil is in a good recycling state.

[0045] like Figure 1 and Figure 2As shown, a plug 12 is provided in the bottom hole of the hinge beam 1, and a filling hole 34 is provided on the plug 12. The setting of the plug 12 makes the hinge beam 1 have a good use effect. Plugs 12 of different specifications can be selected according to different requirements of oil filling, oil pressure control, and processing. A flow control core 33 is installed on the upper part of the plug 12 through a threaded connection. A guide hole 35 is provided on the flow control core 33. The guide hole 35 is a tapered hole structure with a larger upper end and a smaller lower end. A guide cone hole 36 is provided outward from the upper end of the guide hole 35. The aperture of the lower end of the guide hole 35 is consistent with the aperture size of the filling hole 34 for filling and diversion transition. A limiting platform 31 is provided on the outer side of the upper part of the plug 12. The limiting platform 31 and the matching mounting groove 32 on the cylinder bottom 3 are installed and limited to ensure the installation stability of the plug 12.

[0046] like Figure 4-Figure 7 As shown, a valve core 39 is installed at the upper position of the side pipe joint 11 and the lower pipe joint 14 through fine thread threads. The matching position of the valve core 39 and the side pipe joint 11, that is, the external thread of the valve core 39 is processed with a sealing groove, and a sealing ring 40 is installed in the sealing groove. The outer side of the sealing ring 40 is provided with a sealing outer cone 45. It is installed by fine thread matching. Because the pitch of the fine thread is small and the thread lead angle is also small, this is conducive to the self-locking and loosening of the thread, thereby preventing leakage. Due to its large number of threads, continuous close contact can be ensured to prevent oil leakage. At the same time, multiple sealing rings 40 and the sealing outer cone 45 provided on the outer side of the sealing ring 40 can further improve the stability and sealing of the valve core 39 installation. A plug-in groove 42 is provided on the upper end surface of the valve core 39. The plug-in groove 42 is a square groove structure. With the help of a U-shaped tool, the valve core 39 can be quickly disassembled and assembled, and the operation is simple.

[0047] An oil inlet buffer screen 43 is provided in both the side oil supply pipe 21 and the lower oil supply pipe 22. When the inlet oil pressure is high, the hydraulic oil impacts the buffer screen. The outer frame of the buffer screen is equipped with a connecting guide rod 46, a connecting guide sleeve 47, a telescopic spring 48 and a connecting ring 49. Under the action of the impact force, the oil inlet buffer screen 43 can effectively buffer and reduce the damage to the pipe joint caused by the high-pressure impact. A limited support ring 44 is provided on the outer side of the oil inlet buffer screen 43 to facilitate the disassembly, assembly and replacement of the oil inlet buffer screen 43.

[0048] The present invention connects an energy release pipe 38 with a smaller inner diameter in parallel to the pressure relief pipe provided at the lower pipe joint 14 at the bottom of the hinge beam 1, which can realize slight adjustment of the oil pressure inside the cylinder diameter and perform dynamic energy release. The pressure relief oil circuit is used during pressure relief, and the dynamic energy release oil circuit is used during dynamic adjustment control. The pipe flux diameter of the energy release pipe 38 is 1 / 5-1 / 10 of the flux diameter of the main pressure relief pipe 37, so that the oil cylinder energy release has a good pressure regulation effect. The liquid outlet ends of the side pipe joint 11 and the lower pipe joint 14 are both installed with a valve core 39 through a threaded connection. An oil hole 41 is provided at the center of the valve core 39. The oil flow is controlled by the valve core 39 and the oil hole 41. Oil inlet amount, the valve core 39 is provided with oil holes 41 of different sizes and specifications. The valve core 39 with oil holes 41 of appropriate specifications is selected according to the assembly and use requirements. The valve core 39 and the pipe joint are connected by fine thread. In order to ensure the sealing of the connection, a plurality of sealing grooves are provided on the outer wall of the valve core 39, and a sealing ring 2 40 is installed in the sealing groove. A sealing outer cone surface 45 is provided on the outer side of the sealing ring 2 40, which can not only ensure the threaded connection, but also improve the sealing of the fit. At the same time, an oil inlet buffer mesh plate 43 is provided at the lower part of the pipe joint, which can effectively buffer the oil pressure, protect the pipe joint, and increase the service life of the pipe joint.

[0049] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make slight changes or modifications to equivalent embodiments using the above technical content without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A pressure relief device for pressure control of a six-sided top press, comprising a hinge beam (1) and a hydraulic pipeline, characterized in that: The six-sided top press is assembled by assembling six hinge beams (1), each hinge beam (1) is equipped with a hydraulic pipeline, the hydraulic pipeline includes an oil supply pipeline, a pressure relief pipeline and an energy release pipeline, the bottom of the cylinder body of the hinge beam (1) is installed with a cylinder bottom (3), the outside of the cylinder bottom (3) is provided with a working cylinder (2), the upper part of the working cylinder (2) is provided with a guide sleeve (6), the outside of the guide sleeve (6) is provided with an oil injection hole (10), the outside of the oil injection hole (10) is provided with a side pipe joint (11), and the bottom hole of the hinge beam (1) is provided with a plug. The plug (12) is provided with a sealing connection seat (13) at the lower end thereof, a lower pipe joint (14) is provided on one side of the sealing connection seat (13), and a vent plug (15) is provided on the other side thereof, the side pipe joint (11) is connected to one of the oil outlet interfaces of the electromagnetic reversing valve (20) through a side oil supply pipe (21), an oil inlet end of the electromagnetic reversing valve (20) is connected to a liquid pump (18) through a pipeline, the lower pipe joint (14) is connected to the other oil outlet interface of the electromagnetic reversing valve (20) through a lower oil supply pipe (22), and the The lower oil supply pipe (22) is connected to a pressure relief pipe, which includes two parallel pipes, one of which is equipped with a solenoid valve 1 (26), and the other is equipped with a solenoid valve 2 (28) and an overflow pressure reducing valve. At the same time, the pressure relief pipe is also connected in parallel with an energy release pipe, and an energy release solenoid valve (29) is installed on the energy release pipe (38) of the energy release pipe. A pressure relay (30) is connected to the outside of the pressure relief pipe. The liquid outlet ends of the pressure relief pipe and the energy release pipe are connected to the cooler (23), and the cooler (23) is connected to the return oil filter (25) through a pipeline. The liquid outlet end of the return oil filter (25) extends into the oil tank (16), the upper end of the plug (12) is provided with a mounting hole, the mounting hole is a stepped hole structure, a flow control core (33) is provided in the mounting hole, a guide hole (35) is provided in the flow control core (33), and a guide cone hole (36) is provided at the upper end of the guide hole (35). The side pipe joint (11) has the same structure as the lower pipe joint (14), a valve core (39) is provided at the upper position of the side pipe joint (11), and an oil inlet buffer screen (43) is provided at the lower position; The diameter of the main pressure relief pipe (37) of the two parallel pressure relief pipes is larger than the diameter of the energy release pipe (38), and the pipe flux diameter of the energy release pipe (38) is 1 / 5-1 / 10 of the flux diameter of the main pressure relief pipe (37). A pressure gauge (19) is installed on the pipe extending outward between the electromagnetic reversing valve (20) and the liquid pump (18), and an overflow valve (24) is installed on the pipe between the pressure relief pipe and the main oil inlet joint of the electromagnetic reversing valve (20).

2. A pressure relief device for pressure control of a six-sided top press according to claim 1, characterized in that: The guide hole (35) is a tapered hole structure that is larger at the top and smaller at the bottom. A filling hole (34) is provided at the center of the plug (12). The diameter of the lower end of the guide hole (35) is the same as the diameter of the filling hole (34). The diameter of the upper end of the guide hole (35) is the same as the diameter of the lower end of the guide cone hole (36). The taper of the guide cone hole (36) is greater than the taper of the guide hole (35).

3. A pressure relief device for pressure control of a six-sided top press according to claim 2, characterized in that: The valve core (39) is connected to the main body of the side pipe joint (11) through a fine thread. A plurality of sealing grooves are provided on the outer diameter of the thread of the valve core (39). A second sealing ring (40) is installed in the sealing groove. A sealing outer conical surface (45) is provided on the outer side of the second sealing ring (40). The sealing outer conical surface (45) has a structure that is larger at the top and smaller at the bottom.

4. A pressure relief device for pressure control of a six-sided top press according to claim 3, characterized in that: An oil hole (41) is provided at the center of the valve core (39), and a plug-in slot (42) is provided on the upper plane of the valve core (39). The plug-in slot (42) is a rectangular slot structure, and a plurality of the plug-in slots (42) are provided.

5. A pressure relief device for pressure control of a six-sided top press according to claim 4, characterized in that: A connecting guide rod (46) is fixedly provided on the top surface of the outer frame of the oil inlet buffer mesh plate (43), a connecting guide sleeve (47) is sleeved on the outer side of the connecting guide rod (46), the upper end of the connecting guide sleeve (47) is fixedly connected to the bottom surface of the connecting ring (49), a telescopic spring (48) is provided on the outer side of the connecting guide sleeve (47) and the connecting guide rod (46), the upper end of the telescopic spring (48) is fixedly connected to the connecting ring (49), and the lower end of the telescopic spring (48) is fixedly connected to the outer frame of the oil inlet buffer mesh plate (43), and the middle part of the oil inlet buffer mesh plate (43) is a mesh plate structure.

6. A pressure relief device for pressure control of a six-sided top press according to claim 5, characterized in that: The oil inlet buffer mesh plate (43) is a circular structure, and the connecting guide rods (46) and the connecting guide sleeves (47) are provided in multiple groups and are evenly distributed in square shapes along the circumference on the oil inlet buffer mesh plate (43). A limited support ring (44) is provided on the outer side of the oil inlet buffer mesh plate (43).

7. A pressure relief device for pressure control of a six-sided top press according to claim 6, characterized in that: An oil suction filter (17) is provided in the oil tank (16), an oil outlet end of the oil suction filter (17) is connected to a liquid inlet end of the liquid pump (18), and a liquid discharge port is provided on the side of the oil tank (16).

8. A pressure relief device for pressure control of a six-sided top press according to claim 7, characterized in that: A matching installation groove (32) is provided on the bottom surface of the cylinder bottom (3), a limit platform (31) adapted to the matching installation groove (32) is provided on the outer side of the plug (12), a double sealing groove structure is provided at the matching position between the cylinder bottom (3) and the working cylinder (2), a piston (4) is installed in the working cylinder (2), and a sealing ring (5) is provided between the piston (4) and the working cylinder (2).

9. A pressure relief device for pressure control of a six-sided top press according to claim 8, characterized in that: A limiting ring (7) is provided above the guide sleeve (6), a limiting nut (8) is provided above the limiting ring (7), and an upper pad (9) is fixedly installed at the middle position of the piston (4).

Images