A six-sided top press

Abstract

The present invention relates to the technical field of jacking presses, and specifically discloses a six-sided jacking press, comprising six mutually connected jacking devices, each of which is provided with a hydraulic cylinder and a liquid inlet pipe, a top hammer is fixedly arranged at the movable end of the hydraulic cylinder, a pressure relief port is also arranged on the liquid inlet pipe, and six pressure relief mechanisms are also included, each of which comprises a connecting pipe and a transmission member, and the connecting pipe is fixedly connected to the pressure relief port; in the six-sided jacking press of the present invention, when an explosion occurs during use of the jacking press, the top hammers approach each other and push the top transmission member, and the switch mechanism is driven to open the channel in the connecting pipe by pushing the top transmission member, and the external hydraulic oil no longer enters the liquid outlet, so that the hydraulic oil is no longer introduced into the liquid inlet end of the hydraulic cylinder, and the hydraulic power is lost, and the hydraulic oil entering the liquid inlet pipe flows toward the pressure relief port, and then flows into the pressure relief box through the channel in the connecting pipe, thereby preventing the top hammers from moving and squeezing each other, thereby avoiding damage to the top hammers.

Description

Technical Field

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

[0002] The large cavity press device originated from the high pressure technology at the beginning of the last century, including two-sided top press and polyhedron pressure cavity device. The polyhedron pressure cavity device includes tetrahedron press, six-sided top press and octahedron press, among which the tetrahedron pressure cavity is basically no longer used. The six-sided top press is divided into two types: hinge type and pull rod type. The six-sided top press is the most widely used large cavity press in China. This press has the advantages of low cost and easy operation. It is the main equipment for synthesizing superhard materials such as diamond and cubic boron nitride in China.

[0003] refer to Figures 1 to 3 As shown, the existing six-sided pressing machine is composed of six mutually hinged pressing devices 10, each of which is provided with a hydraulic cylinder 12 and a liquid inlet pipe 13, and the liquid inlet pipe 13 is provided with a liquid outlet 131 and a liquid inlet 132, the liquid outlet 131 is connected with the liquid inlet end of the hydraulic cylinder 12, and the liquid inlet 132 is connected with the external hydraulic oil, and a top hammer 14 is fixedly provided at the movable end of the hydraulic cylinder 12, and the external hydraulic oil is pumped to the liquid inlet 132 of the liquid inlet pipe 13, and the hydraulic oil is pressed into the hydraulic cylinder 12 from the liquid outlet 131 through the liquid inlet pipe 13, so that the hydraulic cylinder 12 stretches and drives the top hammer 14 to move, and the six top hammers 14 move and approach each other to realize the function of pressurizing the leaf wax block.

[0004] However, the six-sided top press in the prior art may experience backlash during use. There are many reasons for this phenomenon. One of the reasons is that when the leaf wax block is pressurized or maintained under pressure, the leaf wax block cannot withstand the pressure in the high-pressure chamber due to poor or uneven quality of the leaf wax block, thereby causing the fluid part inside the cavity to be ejected and causing an accident. The top hammers of the top press squeeze each other and cause the top hammers to be damaged, which is one of the main reasons for the loss of the top hammers. Summary of the invention

[0005] The invention provides a six-sided top press, aiming to solve the problem that the six-sided top press in the related art may have a blasting phenomenon when in use, and the top hammers of the top press may be squeezed against each other to cause damage to the top hammers.

[0006] The six-sided jacking machine of the present invention comprises six mutually connected jacking devices, each of which has a hydraulic cylinder and a liquid inlet pipe, the liquid inlet pipe is provided with a liquid outlet and a liquid inlet, the liquid outlet is connected to the liquid inlet end of the hydraulic cylinder, the liquid inlet is connected to the external hydraulic oil, the movable end of the hydraulic cylinder is fixedly provided with a top hammer, the liquid inlet pipe is also provided with a pressure relief port, and further comprises:

[0007] Six pressure relief mechanisms are respectively installed on the six top pressure devices, each of the pressure relief mechanisms includes a connecting pipe and a transmission member, the connecting pipe is fixedly connected to the pressure relief port, the connecting pipe is provided with a switch mechanism for opening and closing the channel in the connecting pipe, one end of the connecting pipe away from the liquid inlet pipe is fixedly connected to a pressure relief box for containing hydraulic oil, the transmission member is fixedly arranged on the hydraulic cylinder, and the movement of the top hammer can drive the switch mechanism to open the channel in the connecting pipe through the top pressure transmission member.

[0008] When an explosion occurs during the use of the jacking press, the top hammers approach each other and push the top transmission part, which drives the switch mechanism to open the channel in the connecting pipe. The external hydraulic oil no longer enters the outlet, and the hydraulic oil is no longer passed into the liquid inlet end of the hydraulic cylinder, which loses hydraulic power. The hydraulic oil entering the liquid inlet pipe flows to the pressure relief port, and then flows into the pressure relief box through the channel in the connecting pipe, thereby preventing the top hammers from moving and squeezing each other, thereby avoiding the top hammers from breaking.

[0009] Preferably, the six-sided pressing machine further comprises a base, and the base is fixedly arranged on one of the pressing devices.

[0010] Preferably, each of the pressing devices comprises a connecting seat, a mounting groove is formed on the connecting seat, and the hydraulic cylinder is fixedly mounted on the inner wall of the mounting groove.

[0011] Preferably, the switch mechanism includes a rotating shaft, a pressure strip and a locking mechanism, the rotating shaft is rotatably set on the connecting tube, a sealing plate that fits the inner wall of the connecting tube is fixedly set on one end of the rotating shaft, the sealing plate abuts against the pressure strip, a limiting plate is fixedly set on the other end of the rotating shaft, a second elastic member is set between the limiting plate and the connecting tube, the pressure strip is slidably set on the connecting tube, a third elastic member is set between the pressure strip and the connecting tube, and the locking mechanism is set on the connecting tube for locking the position of the pressure strip.

[0012] The control strip can limit the edge of the sealing plate to fit the inner wall of the connecting pipe, thereby realizing the sealing of the channel in the connecting pipe. The elastic force of the second elastic member can drive the sealing plate to rotate through the limiting plate and the rotating shaft, so that the sealing plate opens the channel in the connecting pipe, thereby realizing the switching function of the channel in the connecting pipe.

[0013] Preferably, the locking mechanism includes a support fixedly arranged on the connecting pipe and a locking groove formed on the pressure strip, the support is provided with a guide groove, the inner wall of the guide groove is provided with a locking bar slidingly arranged with a single degree of freedom, and the locking bar extends into the locking groove.

[0014] Preferably, the transmission member includes a fixed ring fixedly mounted on the top hammer, the fixed ring is provided with a cavity, a sliding hole and a liquid inlet hole, the sliding hole and the liquid inlet hole are both connected with the cavity, the inner wall of the cavity is slidably fitted with a moving ring, the moving ring is provided with a bearing head, transmission fluid and a fourth elastic member are provided in the cavity, the inner wall of the liquid inlet hole is connected with a buffer box through a connecting pipe, the inner wall of the buffer box is slidably fitted with a bearing plate, the bearing plate is connected with a sliding rod, the sliding rod is provided with a connecting strip, and the connecting strip is fixedly provided on the locking strip.

[0015] Preferably, a fifth elastic member is fixedly provided on the connecting strip, a support plate is fixedly provided on one end of the fifth elastic member away from the connecting strip, and the support plate is fixedly provided on the connecting seat.

[0016] Preferably, a sealing plate is slidably attached to the inner wall of the buffer box, a hole slidably connected to the sliding rod is provided on the sealing plate, and a leakage hole is provided on the bearing plate.

[0017] Part of the transmission fluid that enters the buffer box is released through the leakage hole to reduce the impact force of the transmission oil on the carrier plate, and the remaining transmission fluid will push the carrier plate to move.

[0018] Preferably, the six-sided top press machine further comprises a pumping and pressing mechanism, which comprises a pressing plate slidably fitted on the inner wall of the pressure relief box, and a sixth elastic member is arranged between the upper surface of the pressing plate and the inner wall of the pressure relief box.

[0019] The elastic force of the sixth elastic member can drive the pressure plate to move, and when the six-sided top press is blasted, the hydraulic oil flowing into the connecting pipe can be extracted, thereby improving the pressure relief effect by increasing the flow rate of the hydraulic oil.

[0020] Preferably, a guide column is provided on the upper surface of the pressure plate, and a hole slidably connected to the guide column is opened on the pressure relief box.

[0021] By arranging the cooperation between the guide column and the hole opened on the pressure relief box, the hole on the pressure relief box can limit the movement of the guide column to prevent the guide column from shaking horizontally, thereby improving the sliding stability of the pressure plate.

[0022] The beneficial effects of the present invention are:

[0023] 1. When the top press explodes during use, the top hammers approach each other and push the transmission member, which drives the channel in the connecting pipe to open, so that the hydraulic oil entering the liquid inlet pipe flows to the pressure relief port, and then flows into the pressure relief box through the channel in the connecting pipe, thereby preventing the top hammers from moving and squeezing each other, avoiding damage to the top hammers;

[0024] 2. By setting a switch mechanism, the control pressure strip can limit the edge of the blocking plate to fit the inner wall of the connecting pipe, thereby realizing the blocking of the channel in the connecting pipe. The elastic force of the second elastic member can drive the blocking plate to rotate through the limiting plate and the rotating shaft, so that the blocking plate opens the channel in the connecting pipe, thereby realizing the switch function of the channel in the connecting pipe;

[0025] 3. By opening a leak hole on the bearing plate, part of the transmission fluid entering the buffer box is released through the leak hole to reduce the impact force of the transmission oil on the bearing plate;

[0026] 4. By setting up a pumping and pressing mechanism, the elastic force of the sixth elastic member can drive the pressing plate to move, and when the six-sided top press machine explodes, the hydraulic oil flowing into the connecting pipe can be extracted, thereby increasing the pressure relief effect by increasing the flow rate of the hydraulic oil;

[0027] 5. By arranging the cooperation between the guide column and the hole opened on the pressure relief box, the hole on the pressure relief box can limit the movement of the guide column to prevent the guide column from shaking horizontally, thereby improving the sliding stability of the pressure plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a six-sided top press in the prior art.

[0029] Figure 2 It is an exploded schematic diagram of a six-sided top press in the prior art.

[0030] Figure 3 It is a cross-sectional view of a liquid inlet pipe in the prior art.

[0031] Figure 4 It is a structural schematic diagram of a specific embodiment of the present invention.

[0032] Figure 5 It is a structural schematic diagram of a top pressure device and a pressure relief mechanism in a specific embodiment of the present invention.

[0033] Figure 6 It is a structural schematic diagram of a connecting seat, a hydraulic cylinder and a liquid inlet pipe in a specific embodiment of the present invention.

[0034] Figure 7 It is a structural schematic diagram of a connecting pipe, a switch mechanism, a pressure relief box and a transmission member in a specific embodiment of the present invention.

[0035] Figure 8 It is a schematic diagram of the structure of a connecting pipe in a specific embodiment of the present invention.

[0036] Fig. 9 It is a structural schematic diagram of a switch mechanism in a specific embodiment of the present invention.

[0037] Fig.10It is a cross-sectional view of a lock bar according to a specific embodiment of the present invention.

[0038] Fig.11 It is a cross-sectional view of a fixed ring and a movable ring according to a specific embodiment of the present invention.

[0039] Fig.12 It is a structural schematic diagram of a buffer box, a bearing plate, a sealing plate, a sliding rod, a connecting strip, a fifth elastic member and a supporting plate in a specific embodiment of the present invention.

[0040] Fig.13 It is a structural schematic diagram of the pumping and pressing mechanism of a specific embodiment of the present invention.

[0041] Reference numerals:

[0042] 10. Pressing device; 11. Connecting seat; 111. Mounting groove; 12. Hydraulic cylinder; 13. Liquid inlet pipe; 131. Liquid outlet; 132. Liquid inlet; 133. Pressure relief port; 14. Top hammer; 20. Base; 30. Pressure relief mechanism; 31. Connecting pipe; 32. Switch mechanism; 321. Rotating shaft; 322. Blocking plate; 323. Limiting plate; 324. Second elastic member; 325. Pressure strip; 326. Locking mechanism; 3261. Support; 3262. Guide groove; 3263. Locking strip; 3264, locking groove; 33, pressure relief box; 34, transmission part; 341, fixing ring; 3411, cavity; 3412, sliding hole; 3413, liquid inlet hole; 342, moving ring; 3421, bearing head; 343, buffer box; 344, bearing plate; 3441, leakage hole; 345, sealing plate; 346, sliding rod; 347, connecting strip; 348, fifth elastic part; 349, support plate; 40, pumping and pressing mechanism; 41, pressure plate; 42, sixth elastic part; 43, guide column. DETAILED DESCRIPTION

[0043] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0044] like Figures 4 to 13 As shown, the six-sided pressing machine of the present invention includes six mutually connected pressing devices 10, one of which is provided with a base 20 for supporting the six-sided pressing machine, and six pressure relief mechanisms 30 are respectively installed on the six pressing devices 10 for relieving pressure on the pressing devices 10.

[0045] refer to Figures 4 to 6As shown, each jacking device 10 includes a connecting seat 11, a mounting groove 111 is provided on the connecting seat 11, a hydraulic cylinder 12 is fixedly installed on the inner wall of the mounting groove 111, a liquid inlet pipe 13 is fixedly connected to the liquid inlet end of the hydraulic cylinder 12, and the liquid inlet pipe 13 has a liquid outlet 131, a liquid inlet 132 and a pressure relief port 133, the liquid outlet 131 is connected to the liquid inlet end of the hydraulic cylinder 12, and the liquid inlet 132 is connected to the external hydraulic oil, a top hammer 14 is fixedly provided at the movable end of the hydraulic cylinder 12, and the external hydraulic oil can enter the liquid inlet pipe 13 from the liquid inlet 132, and then be pressed into the liquid inlet end of the hydraulic cylinder 12 through the liquid outlet 131, and the base 20 is welded to one of the connecting seats 11.

[0046] refer to Figure 4 , Figure 5 , Figures 7 to 12 As shown, each pressure relief mechanism 30 includes a connecting pipe 31 and a transmission member 34. The connecting pipe 31 is fixedly connected to the pressure relief port 133. The connecting pipe 31 is provided with a switch mechanism 32 for opening and closing the channel in the connecting pipe 31. One end of the connecting pipe 31 away from the liquid inlet pipe 13 is fixedly connected to a pressure relief box 33, which can be used to contain hydraulic oil. The transmission member 34 is fixedly arranged on the hydraulic cylinder 12. When the top press machine explodes during use, the top hammer 14 can press the transmission member 34. The top hammer 14 drives the switch mechanism 32 to open the channel in the connecting pipe 31 through the top pressure transmission of the transmission member 34.

[0047] The switch mechanism 32 includes a rotating shaft 321, a pressure strip 325 and a locking mechanism 326. The rotating shaft 321 is rotatably arranged on the connecting tube 31 through a sealed bearing. One end of the rotating shaft 321 is fixedly connected to a blocking plate 322. The blocking plate 322 fits the inner wall of the connecting tube 31 and can block the channel in the connecting tube 31. The upper surface of the blocking plate 322 abuts against the lower surface of the pressure strip 325. The other end of the rotating shaft 321 is fixedly connected to a limiting plate 323. A second elastic member 324 is arranged between the limiting plate 323 and the connecting tube 31. In this embodiment, the second elastic member 324 Component 324 is a spring. The elastic force of the second elastic component 324 can drive the sealing plate 322 to rotate through the limiting plate 323 and the rotating shaft 321, so that the sealing plate 322 opens the channel in the connecting tube 31. The pressure strip 325 is slidably set on the connecting tube 31. A third elastic component is set between the pressure strip 325 and the connecting tube 31. The elastic force of the third elastic component can drive the pressure strip 325 to move, so that the pressure strip 325 is separated from the sealing plate 322 and the restriction on the sealing plate 322 is released. The locking mechanism 326 is set on the connecting tube 31, which is used to lock the position of the pressure strip 325.

[0048] Continue to refer Figures 7 to 10As shown, the locking mechanism 326 includes a support 3261 fixedly arranged on the connecting pipe 31 and a locking groove 3264 opened on the pressure strip 325, and a guide groove 3262 is opened on the support 3261. The inner wall of the guide groove 3262 is slidably connected with a locking bar 3263 in a single degree of freedom. The locking bar 3263 extends into the locking groove 3264. The pressure strip 325 can be locked by the restriction of the locking bar 3263 and the locking groove 3264.

[0049] Continue to refer Fig.11 and Fig.12 As shown, the transmission member 34 includes a fixed ring 341 fixedly mounted on the top hammer 14, a cavity 3411, a sliding hole 3412 and a liquid inlet hole 3413 are arranged in the fixed ring 341, the sliding hole 3412 is connected to the cavity 3411, the liquid inlet hole 3413 is connected to the cavity 3411, a moving ring 342 is slidably fitted on the inner wall of the cavity 3411, a bearing head 3421 is arranged on the moving ring 342, a transmission fluid is arranged between the side of the moving ring 342 away from the bearing head 3421 and the inner wall of the cavity 3411 of the fixed ring 341, a fourth elastic member is arranged between the moving ring 342 and the cavity 3411 in the fixed ring 341, in this embodiment, the fourth elastic member is a spring, the fourth elastic member can push the moving ring 342 to move, the bearing head 3421 is slidably connected to the inner wall of the sliding hole 3412 with a single degree of freedom, The inner wall of the liquid inlet hole 3413 is connected to the buffer box 343 through a connecting pipe. The buffer box 343 is fixedly installed on the connecting seat 11. The inner wall of the buffer box 343 is slidably fitted with a bearing plate 344 and a sealing plate 345. The bearing plate 344 is provided with a leakage hole 3441. The bearing plate 344 is fixedly connected with a sliding rod 346 through a connecting frame. The buffer box 343 is provided with a hole slidably connected to the sliding rod 346. The end of the sliding rod 346 away from the bearing plate 344 is fixedly connected to a connecting strip 347. The connecting strip 347 is fixedly connected to the locking strip 3263. The connecting strip 347 is fixedly connected to a fifth elastic member 348. The end of the fifth elastic member 348 away from the connecting strip 347 is fixedly connected to a support plate 349. The support plate 349 is fixedly set on the connecting seat 11. The sealing plate 345 is provided with a hole slidably connected to the sliding rod 346.

[0050] When in use, the six pressing devices 10 are controlled to extend to press the product. When the pressing machine explodes during use, the top hammers 14 will approach each other, and the top hammers 14 move to overcome the elastic force of the fourth elastic member and press the bearing head 3421 on the transmission member 34. The bearing head 3421 is forced to drive the entire moving ring 342 to move in the cavity 3411 in the fixed ring 341. The moving ring 342 moves to push the transmission fluid in the fixed ring 341 into the buffer box 343. A part of the transmission fluid entering the buffer box 343 is released through the leakage hole 3441 to reduce the impact force of the transmission oil. The remaining part of the transmission fluid will push the bearing plate 344 to move. The bearing plate 344 moves through the connecting frame and the sliding rod 346 to push the connecting strip 347 to overcome the elastic force of the fifth elastic member 348 to move. The connecting strip 347 moves to push The locking bar 3263 moves and disengages from the locking groove 3264 on the pressure bar 325. After the pressure bar 325 is free from the restriction of the locking bar 3263, the pressure bar 325 can be driven to move under the elastic force of the third elastic member, so that the pressure bar 325 is free from the blocking plate 322 and the restriction on the blocking plate 322 is released. At this time, the elastic force of the second elastic member 324 can drive the blocking plate 322 to rotate through the limiting plate 323 and the rotating shaft 321, so that the blocking plate 322 opens the channel in the connecting pipe 31, and the hydraulic oil entering the liquid inlet 132 of the liquid inlet pipe 13 no longer flows to the liquid outlet 131, so that the hydraulic oil no longer flows into the liquid inlet end of the hydraulic cylinder 12, and the hydraulic power is lost. The hydraulic oil entering the liquid inlet pipe 13 flows toward the pressure relief port 133, and then flows into the pressure relief box 33 through the connecting pipe 31, thereby preventing the top hammer 14 from being squeezed and damaged during movement.

[0051] When the six-sided pressing machine needs to be reset, the six pressing devices 10 can be controlled to contract to extract the hydraulic oil in the pressure relief box 33, and then overcome the elastic force of the third elastic member to push the pressing strip 325, so that the locking groove 3264 on the pressing strip 325 is aligned with the locking strip 3263, and at the same time, the pressing strip 325 pushes the blocking plate 322 to rotate, so that the blocking plate 322 blocks the channel in the connecting pipe 31. Since the bearing head 3421 is no longer pushed by the top hammer 14 at this time, the elastic force of the fifth elastic member 348 will push the connecting strip 347 to move and reset, and the connecting strip 347 moves through The sliding rod 346 and the connecting frame push the bearing plate 344 to reset, the connecting strip 347 moves to drive the locking strip 3263 to insert into the locking groove 3264 on the pressure strip 325, and locks the pressure strip 325. The elastic force of the fourth elastic member drives the moving ring 342 to move and reset, so that the bearing head 3421 extends outward from the fixed ring 341. The movement of the moving ring 342 causes a negative pressure state inside the fixed ring 341, and the sealing plate 345 is pushed to move under the pressure of atmospheric pressure. The movement of the sealing plate 345 pushes the transmission fluid in the buffer box 343 along the connecting tube into the fixed ring 341.

[0052] refer to Fig.13As shown, the six-sided top press of the present invention also includes a pumping and pressing mechanism 40, which is arranged on the pressure relief box 33. The pumping and pressing mechanism 40 includes a pressure plate 41 that is slidably fitted on the inner wall of the pressure relief box 33. The edge of the pressure plate 41 is made of rubber material, which is used to maintain abutment with the inner wall of the pressure relief box 33 to improve the sealing between the pressure plate 41 and the inner wall of the pressure relief box 33. A sixth elastic member 42 is fixedly arranged between the upper surface of the pressure plate 41 and the inner wall of the pressure relief box 33. The elastic force of the sixth elastic member 42 can drive the pressure plate 41 to move. When the six-sided top press has an explosion, the hydraulic oil flowing into the connecting pipe 31 can be extracted, and the pressure relief effect can be improved by increasing the flow rate of the hydraulic oil. In this embodiment, the sixth elastic member 42 is a tension spring, and a guide column 43 is welded on the upper surface of the pressure plate 41. A hole slidably connected to the guide column 43 is opened on the pressure relief box 33. The cooperation of the hole guide column 43 on the pressure relief box 33 can improve the sliding stability of the pressure plate 41.

[0053] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0055] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A six-sided jacking machine, comprising six mutually connected jacking devices, each of which has a hydraulic cylinder and a liquid inlet pipe, the liquid inlet pipe is provided with a liquid outlet and a liquid inlet, the liquid outlet is connected to the liquid inlet end of the hydraulic cylinder, the liquid inlet is connected to the external hydraulic oil, and the movable end of the hydraulic cylinder is fixedly provided with a top hammer, characterized in that: The liquid inlet pipe is also provided with a pressure relief port, and further comprises: Six pressure relief mechanisms are respectively installed on the six top pressure devices, each of the pressure relief mechanisms includes a connecting pipe and a transmission member, the connecting pipe is fixedly connected to the pressure relief port, the connecting pipe is provided with a switch mechanism for opening and closing the channel in the connecting pipe, one end of the connecting pipe away from the liquid inlet pipe is fixedly connected to a pressure relief box for containing hydraulic oil, the transmission member is fixedly arranged on the hydraulic cylinder, and the movement of the top hammer can drive the switch mechanism to open the channel in the connecting pipe through the top pressure transmission member; The switch mechanism includes a rotating shaft, a pressure strip and a locking mechanism, the rotating shaft is rotatably arranged on the connecting tube, a blocking plate that fits the inner wall of the connecting tube is fixedly arranged on one end of the rotating shaft, the blocking plate abuts against the pressure strip, a limiting plate is fixedly arranged on the other end of the rotating shaft, a second elastic member is arranged between the limiting plate and the connecting tube, the pressure strip is slidably arranged on the connecting tube, a third elastic member is arranged between the pressure strip and the connecting tube, and the locking mechanism is arranged on the connecting tube for locking the position of the pressure strip; The locking mechanism comprises a support fixedly arranged on the connecting pipe and a locking groove provided on the pressure strip, wherein the support is provided with a guide groove, and a locking strip is provided on the inner wall of the guide groove in a single degree of freedom sliding manner, and the locking strip extends into the locking groove; The transmission member comprises a fixed ring fixedly mounted on the top hammer, the fixed ring is provided with a cavity, a sliding hole and a liquid inlet hole, the sliding hole and the liquid inlet hole are both connected with the cavity, a moving ring is slidably fitted on the inner wall of the cavity, a bearing head is provided on the moving ring, a transmission fluid and a fourth elastic member are provided in the cavity, the inner wall of the liquid inlet hole is connected with a buffer box through a connecting pipe, the inner wall of the buffer box is slidably fitted with a bearing plate, a sliding rod is connected to the bearing plate, a connecting strip is provided on the sliding rod, and the connecting strip is fixedly arranged on the locking strip; A fifth elastic member is fixedly provided on the connecting strip, a support plate is fixedly provided on one end of the fifth elastic member away from the connecting strip, and the support plate is fixedly provided on the connecting seat; A sealing plate is slidably attached to the inner wall of the buffer box, a hole slidably connected to the sliding rod is provided on the sealing plate, and a leakage hole is provided on the bearing plate.

2. The six-sided top press according to claim 1, characterized in that: It also includes a base, which is fixedly arranged on one of the pressing devices.

3. The six-sided top press according to claim 1, characterized in that: Each of the pressing devices comprises a connecting seat, a mounting groove is provided on the connecting seat, and the hydraulic cylinder is fixedly mounted on the inner wall of the mounting groove.

4. The six-sided top press according to any one of claims 1 to 3, characterized in that: It also includes a pumping and pressing mechanism, which includes a pressure plate slidably fitted on the inner wall of the pressure relief box, and a sixth elastic member is arranged between the upper surface of the pressure plate and the inner wall of the pressure relief box.

5. The six-sided top press according to claim 4, characterized in that: A guide column is arranged on the upper surface of the pressure plate, and a hole which is slidably connected with the guide column is opened on the pressure relief box.

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