Vacuum active adjustable pressure relief structure in cutting bed and cutting bed

Abstract

The utility model provides a vacuum active adjustable pressure relief structure in a cutting bed and the cutting bed, the cutting bed comprises a vacuum pump, a vacuum pump air suction pipe, a vacuum pump air outlet pipe and a bed body connecting pipeline, one end of the vacuum pump air outlet pipe is connected with the vacuum pump; one end of the vacuum pump suction pipe is connected with the vacuum pump, and the other end is connected with the bed body connecting pipeline; the end, away from the vacuum pump air suction pipe, of the bed body connecting pipeline is arranged on the lower side of a cutting table of the cutting bed. A pressure release valve assembly is arranged on the vacuum pump air suction pipe and comprises a pressure release valve sleeve shell, a pressure release valve inner spring, a pressure release valve head sealing block, a pressure release valve double-acting air cylinder, a pressure release valve double-acting air cylinder piston shaft, a pressure release valve exhaust ejector pin and a pressure release valve double-acting air cylinder mounting sleeve, and the pressure release valve inner spring is arranged in the pressure release valve sleeve shell. The pressure release valve head sealing block is arranged in the pressure release valve sleeve shell, and the pressure release valve head sealing block abuts against the pressure release valve internal spring and is used for sealing the end of the pressure release valve sleeve shell.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting table equipment, in particular to a vacuum active adjustable pressure relief structure in a cutting table and the cutting table. Background Art

[0002] A cutting table is a device used for cutting materials such as leather, imitation leather, fabric, and cardboard. The quality of the cutting directly impacts the quality and wearability of the finished product. The cutting process involves laying one or more layers of material flat on the table, then marking the top surface of the top layer, and finally cutting along these lines. The table is typically equipped with vacuum vents to securely hold the material to the surface, preventing it from shifting during cutting, which could affect the accuracy of the cut and the shape of the garment.

[0003] Currently, cutting table vacuum adsorption systems on the market generally use a vacuum pump and a forward and reverse blowing structure, or other devices similar to forward and reverse blowing structures, to achieve forward suction and reverse blowing. Before the vacuum pump draws air, the gas pressure inside and outside the pipeline is the same. From the air inlet of the honeycomb aluminum plate, through the pipeline, the pipeline regulating air bag, the forward and reverse blowing structure, the vacuum pump, and then to the exhaust pipe, there is no pressure conflict throughout the entire process. However, in actual operation, after the suction process is completed, the blowing process is immediately reversed. At this time, due to the long suction pipeline, the compressed air inside the pipeline has not been completely and promptly expelled. Immediately performing the reverse blowing operation will affect the reverse blowing air volume, increasing the motion load and energy consumption of the vacuum pump.

[0004] Therefore, it is necessary to design a vacuum active adjustable pressure relief structure and a cutting table in the cutting table to accelerate the release of gas pressure in the pipeline, thereby shortening the time between forward suction and reverse blowing. Utility Model Content

[0005] In view of the shortcomings of the existing technology mentioned above, the technical problem to be solved by the present invention is to provide a vacuum actively adjustable pressure relief structure and a cutting table in the cutting table, which is used to solve the problem of delay when switching between forward suction and reverse blowing in the existing technology. At the same time, the opening of the pressure relief structure is actively adjustable, and the wind force of the reverse blowing can be adjusted.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a vacuum active adjustable pressure relief structure in a cutting table, which is applied to a cutting table; the cutting table includes a vacuum pump, a vacuum pump suction pipe, a vacuum pump outlet pipe, and a bed connecting pipe, one end of the vacuum pump outlet pipe is connected to the vacuum pump; one end of the vacuum pump suction pipe is connected to the vacuum pump, and the other end is connected to the bed connecting pipe; the end of the bed connecting pipe away from the vacuum pump suction pipe is arranged on the lower side of the cutting table of the cutting table; a pressure relief valve assembly is arranged on the vacuum pump suction pipe, and the pressure relief valve assembly includes a pressure relief valve housing, an internal spring of the pressure relief valve, a pressure relief valve head sealing block, a pressure relief valve re-acting cylinder, a pressure relief valve re-acting cylinder piston shaft, The pressure relief valve exhaust ejector pin and the pressure relief valve double-acting cylinder mounting sleeve, the pressure relief valve internal spring is arranged in the pressure relief valve housing, the pressure relief valve head sealing block is arranged in the pressure relief valve housing, and the pressure relief valve head sealing block abuts against the pressure relief valve internal spring, for closing the end of the pressure relief valve housing; the pressure relief valve double-acting cylinder mounting sleeve is connected to the outer circumferential surface of the pressure relief valve housing, the pressure relief valve double-acting cylinder is fixedly connected to the pressure relief valve double-acting cylinder mounting sleeve; the pressure relief valve double-acting cylinder piston shaft is slidably arranged in the pressure relief valve double-acting cylinder, the pressure relief valve exhaust ejector pin is arranged on the pressure relief valve double-acting cylinder piston shaft, and pushes open the pressure relief valve head sealing block under the action of the pressure relief valve double-acting cylinder piston shaft.

[0007] Preferably, a pressure relief valve silencer sleeve is further provided between the pressure relief valve housing and the pressure relief valve re-acting cylinder mounting sleeve, screw threads are provided on the outer circumferential surface of the pressure relief valve housing, threaded holes are provided in the pressure relief valve silencer sleeve, and the pressure relief valve silencer sleeve is fastened to the end of the pressure relief valve housing through the screw threads and the threaded holes; screw threads are provided on the outer circumferential surface of the pressure relief valve re-acting cylinder mounting sleeve, and the pressure relief valve re-acting cylinder mounting sleeve is fastened to the end of the pressure relief valve silencer sleeve away from the pressure relief valve housing through the screw threads and the threaded holes.

[0008] Preferably, a transfer tube is further provided on the vacuum pump suction pipe, and the pressure relief valve housing is connected to the vacuum pump suction pipe through the transfer tube.

[0009] Preferably, the cutting bed includes a micro-blowing component silencer box, and the micro-blowing component silencer box includes a box body, a silencer pipe, a return air duct, and a return air duct sealing assembly. The vacuum pump suction duct and the vacuum pump outlet duct are both arranged in the box body; the vacuum pump outlet duct and the vacuum pump suction duct are connected through the return air duct, and the return air duct sealing assembly is used to control the opening and closing of the return air duct.

[0010] Preferably, the silencer tube includes a U-shaped tube body and a silencer air outlet. The U-shaped tube body is arranged in the box body. One end of the U-shaped tube body is connected to the vacuum pump outlet pipe, and the other end of the U-shaped tube body is connected to the atmosphere through the silencer air outlet 402.

[0011] Preferably, the vacuum pump air outlet pipe and the vacuum pump air suction pipe are parallel to each other, the U-shaped tube body is arranged above the vacuum pump air suction pipe and the vacuum pump air outlet pipe, and the U-shaped tube body and the vacuum pump air suction pipe are perpendicular to each other in space.

[0012] Preferably, the return air duct sealing assembly includes a return air duct sealing cylinder, a return air duct sealing cylinder piston shaft, and a return air duct plug. The return air duct sealing cylinder is arranged on the vacuum pump outlet duct, the return air duct sealing cylinder piston shaft can be slidably arranged in the return air duct sealing cylinder, and the return air duct plug is arranged on the return air duct sealing cylinder piston shaft. The return air duct plug can block the return air duct under the movement of the return air duct sealing cylinder piston shaft.

[0013] Preferably, a vacuum pump placement box is also provided in the cutting bed, and the vacuum pump is arranged in the vacuum pump placement box. The vacuum pump placement box is fixedly connected to the box body of the micro-blowing component silencer box; heat dissipation holes are opened on the outer peripheral surface of the vacuum pump placement box.

[0014] Preferably, the cutting table is further provided with a control system, which is connected to the pressure relief valve re-actuating cylinder and the return air duct blocking assembly and is used to control the operation of the pressure relief valve re-actuating cylinder and the return air duct blocking assembly.

[0015] As described above, the vacuum active adjustable pressure relief structure in the cutting table and the cutting table involved in the present invention have the following beneficial effects:

[0016] The utility model relates to a vacuum actively adjustable pressure relief structure in a cutting table and a cutting table. During the reverse blowing process, the pressure relief valve assembly can be opened to quickly remove the excess pressure inside the bed connecting pipe, which helps to quickly carry out the reverse blowing movement. The opening of the pressure relief valve assembly is flexibly adjusted by the pressure relief valve reciprocating cylinder. By changing the opening of the pressure relief valve, the size of the reverse blowing wind force can be changed, thereby adapting to cutting materials of different materials and having a wide range of adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the first angle connection of the vacuum active adjustable pressure relief structure in the cutting table involved in the utility model;

[0018] Figure 2 This is a schematic diagram of the second angle connection of the vacuum active adjustable pressure relief structure in the cutting table involved in the utility model;

[0019] Figure 3 This is a spatial schematic diagram of the vacuum active adjustable pressure relief structure in the cutting table involved in the utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of the vacuum active adjustable pressure relief structure in the cutting table involved in the utility model;

[0021] Figure 5 This is a cross-sectional view of the vacuum active adjustable pressure relief structure in the cutting table involved in the utility model;

[0022] Figure 6 This is a schematic diagram of the vacuum active adjustable pressure relief structure in the cutting table involved in the present invention during positive suction;

[0023] Figure 7 It is a schematic diagram of the vacuum active adjustable pressure relief structure in the cutting table involved in the present invention during reverse suction.

[0024] Description of reference numerals:

[0025] 1. Vacuum pump; 101. Vacuum pump placement box; 102. Heat dissipation hole; 2. Vacuum pump suction pipe; 201. Adapter pipe; 3. Vacuum pump outlet pipe; 4. Silencer pipe; 401. U-shaped pipe body; 402. Silencer outlet; 5. Return air duct sealing assembly; 501. Return air duct sealing cylinder; 502. Return air duct sealing cylinder piston shaft; 503. Return air duct plug; 6. Return air duct; 7. Pressure relief valve assembly; 701. Pressure relief valve housing; 702. Pressure relief valve internal spring; 703. Pressure relief valve head sealing block; 704. Pressure relief valve silencer sleeve; 705. Pressure relief valve re-acting cylinder mounting sleeve; 706. Pressure relief valve exhaust ejector; 707. Pressure relief valve re-acting cylinder; 708. Pressure relief valve re-acting cylinder piston shaft. DETAILED DESCRIPTION

[0026] The following describes the implementation of the present invention through specific embodiments. People familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0027] It should be noted that the structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in this specification for the understanding and reading of those familiar with this technology, and are not used to limit the conditions for the implementation of this utility model. Therefore, they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed in this utility model without affecting the efficacy and purpose of the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", etc. quoted in this specification are only for the convenience of description and are not used to limit the scope of the implementation of this utility model. Changes or adjustments in their relative relationships should also be considered as the scope of the implementation of this utility model without substantially changing the technical content.

[0028] like Figure 1-Figure 7As shown, the utility model provides a vacuum active adjustable pressure relief structure in a cutting table, which is applied to a cutting table; the cutting table includes a vacuum pump 1, a vacuum pump suction pipe 2, a vacuum pump outlet pipe 3, and a bed connecting pipe, one end of the vacuum pump outlet pipe 3 is connected to the vacuum pump 1; one end of the vacuum pump suction pipe 2 is connected to the vacuum pump 1, and the other end is connected to the bed connecting pipe; the end of the bed connecting pipe away from the vacuum pump suction pipe 2 is arranged on the lower side of the cutting table of the cutting table; a pressure relief valve assembly 7 is provided on the vacuum pump suction pipe 2, and the pressure relief valve assembly 7 includes a pressure relief valve housing 701, a pressure relief valve internal spring 702, a pressure relief valve head sealing block 703, a pressure relief valve re-acting cylinder 707, a pressure relief valve re-acting cylinder piston shaft 708, a pressure relief valve exhaust ejector pin 706, and a pressure relief valve re-acting cylinder piston shaft 708. The cylinder mounting sleeve 705, the internal spring 702 of the pressure relief valve is arranged in the pressure relief valve housing 701, the pressure relief valve head sealing block 703 is arranged in the pressure relief valve housing 701, and the pressure relief valve head sealing block 703 is in contact with the internal spring 702 of the pressure relief valve, for closing the end of the pressure relief valve housing 701; the pressure relief valve double-acting cylinder mounting sleeve 705 is connected to the outer peripheral surface of the pressure relief valve housing 701, and the pressure relief valve double-acting cylinder 707 is fixedly connected to the pressure relief valve double-acting cylinder mounting sleeve 705; the pressure relief valve double-acting cylinder piston shaft 708 is slidably arranged in the pressure relief valve double-acting cylinder 707, and the pressure relief valve exhaust ejector pin 706 is arranged on the pressure relief valve double-acting cylinder piston shaft 708, and the pressure relief valve head sealing block 703 is pushed open under the action of the pressure relief valve double-acting cylinder piston shaft 708.

[0029] The utility model relates to a vacuum active adjustable pressure relief structure in a cutting table, which is provided with a pressure relief valve re-acting cylinder 707 and a pressure relief valve exhaust ejector pin 706. The pressure relief valve re-acting cylinder 707 drives the pressure relief valve exhaust ejector pin 706 to push open the pressure relief valve head sealing block 703, so that the pressure relief valve will open. When the pressure relief valve is opened, the vacuum negative pressure in the vacuum pump suction pipe 2 will be quickly relieved, and the gas pressure in the vacuum pump suction pipe 2 will quickly be equalized to the external air pressure, thereby solving the problem that the vacuum pump 1 has a delay when switching between forward suction and reverse suction. If reverse blowing is performed immediately, the reverse blowing air volume will be affected, and the motion load and energy consumption of the vacuum pump 1 will be increased.

[0030] Preferably, Figure 3 、 Figure 5 As shown, a pressure relief valve silencer sleeve 704 is further provided between the pressure relief valve housing 701 and the pressure relief valve re-acting cylinder mounting sleeve 705. Screw threads are provided on the outer circumferential surface of the pressure relief valve housing 701, and threaded holes are provided in the pressure relief valve silencer sleeve 704. The pressure relief valve silencer sleeve 704 is fastened to the end of the pressure relief valve housing 701 through the screw threads and the threaded holes; screw threads are provided on the outer circumferential surface of the pressure relief valve re-acting cylinder mounting sleeve 705, and the pressure relief valve re-acting cylinder mounting sleeve 705 is fastened to the end of the pressure relief valve silencer sleeve 704 away from the pressure relief valve housing 701 through the screw threads and the threaded holes.

[0031] In this embodiment, the pressure relief valve silencer sleeve 704 is used to reduce noise during pressure relief. The pressure relief valve housing 701, the pressure relief valve silencer sleeve 704, and the pressure relief valve reciprocating cylinder mounting sleeve 705 are all connected by threads, and a sealing gasket can be provided between the three to ensure that the joints are leak-proof.

[0032] Preferably, Figure 1 、 Figure 3 As shown, the vacuum pump suction pipe 2 is further provided with an adapter tube 201, through which the pressure relief valve housing 701 communicates with the vacuum pump suction pipe 2. In this embodiment, the adapter tube 201 is a T-shaped three-way structure, with two pipe ends of the adapter tube 201 connected to the vacuum pump suction pipe 2, and the other pipe end of the adapter tube 201 is hermetically connected to the pressure relief valve housing 701 via external and internal threads; thus, the pressure relief valve assembly 7 is installed on the vacuum pump suction pipe 2.

[0033] To achieve the above-mentioned purpose or other purposes, the present invention further discloses a cutting table, comprising a micro-blowing assembly silencer box, the micro-blowing assembly silencer box comprising a box body, a silencer pipe 4, a return air duct 6, and a return air duct blocking assembly 5. The vacuum pump suction duct 2 and the vacuum pump outlet duct 3 are both disposed within the box body; the vacuum pump outlet duct 3 and the vacuum pump suction duct 2 are connected via the return air duct 6, and the return air duct blocking assembly 5 is used to control the opening and closing of the return air duct 6. The end of the vacuum pump outlet duct 3 away from the vacuum pump 1 is connected to the return air duct 6.

[0034] Preferably, Figure 2 As shown, the silencer 4 includes a U-shaped tube body 401 and a silencer air outlet 402. The U-shaped tube body 401 is arranged in the box body. One end of the U-shaped tube body 401 is connected to the vacuum pump outlet pipe 3, and the other end of the U-shaped tube body 401 is connected to the atmosphere through the silencer air outlet 402.

[0035] Further, such as Figure 1 、 Figure 2 As shown, the vacuum pump outlet pipe 3 and the vacuum pump suction pipe 2 are parallel to each other, the U-shaped tube body 401 is arranged on the upper side of the vacuum pump suction pipe 2 and the vacuum pump outlet pipe 3, and the U-shaped tube body 401 and the vacuum pump suction pipe 2 are perpendicular to each other in space; in this way, the vacuum pump outlet pipe 3, the vacuum pump suction pipe 2, the return air pipe 6, and the U-shaped tube body 401 are all integrated into the box, reducing the space occupied by the equipment.

[0036] Preferably, Figure 6 、 Figure 7As shown, the return air duct sealing assembly 5 includes a return air duct sealing cylinder 501, a return air duct sealing cylinder piston shaft 502, and a return air duct plug 503. The return air duct sealing cylinder 501 is arranged on the vacuum pump outlet pipe 3, the return air duct sealing cylinder piston shaft 502 is slidably arranged in the return air duct sealing cylinder 501, and the return air duct plug 503 is arranged on the return air duct sealing cylinder piston shaft 502. The return air duct plug 503 can block the return air duct 6 under the movement of the return air duct sealing cylinder piston shaft 502.

[0037] In this embodiment, when the return air duct 6 is blocked by the return air duct sealing assembly 5, the gas at the cutting table of the cutting bed enters the vacuum pump suction duct 2 through the bed connecting pipe, and then enters the vacuum pump outlet duct 3 through the vacuum pump 1, and is discharged after being silenced by the silencer 4. At this time, the vacuum pump 1 is in a forward suction state.

[0038] When the return air duct 6 is not blocked by the return air duct sealing assembly 5, the gas at the cutting table of the cutting bed enters the vacuum pump suction duct 2 through the bed connecting pipe, and then enters the vacuum pump outlet duct 3 through the vacuum pump 1. Part of it is discharged after being silenced by the silencer 4, and the other part returns to the vacuum pump suction duct 2 through the return air duct 6; part of the gas that returns to the vacuum pump suction duct 2 returns to the vacuum pump 1, and the other part of the gas that returns to the vacuum pump suction duct 2 is offset by the negative pressure gas in the vacuum pump suction duct 2 and the bed connecting pipe, thereby realizing backblowing of the cut material at the cutting table.

[0039] Preferably, Figure 1 As shown, a vacuum pump placement box 101 is also provided in the cutting table, and the vacuum pump 1 is arranged in the vacuum pump placement box 101. The vacuum pump placement box 101 is fixedly connected to the box body of the micro-blowing component silencer box; a heat dissipation hole 102 is opened on the outer peripheral surface of the vacuum pump placement box 101.

[0040] Preferably, in this embodiment, the cutting table is further provided with a control system, which is connected to the pressure relief valve re-actuating cylinder 707 and the return air duct blocking assembly 5 and is used to control the operation of the pressure relief valve re-actuating cylinder 707 and the return air duct blocking assembly 5. The return air duct blocking assembly 5 controls the opening and closing of the return air duct 6; the pressure relief valve assembly 7 quickly relieves the negative pressure in the vacuum pump suction duct 2, and adjusts the reverse blowing force by adjusting the opening of the pressure relief valve assembly 7.

[0041] When the vacuum pump 1 is working, vacuum or negative pressure is formed in the vacuum pump suction pipe 2, and slightly positive pressure is formed in the vacuum pump outlet pipe 3.

[0042] When the vacuum pump 1 completes the forward suction process, it immediately reverses to the reverse blowing process, and the return air pipe 6 connects the vacuum pump outlet pipe 3 and the vacuum pump suction pipe 2. Since the bed connecting pipe is long, the vacuum degree inside the bed connecting pipe is still lower than the external air pressure, and the cut material will still be adsorbed on the cutting table. After a period of return air, the slightly positive pressure gas enters the vacuum pump suction pipe 2 from the vacuum pump outlet pipe 3 to offset the vacuum degree in the vacuum pump suction pipe 2. The vacuum degree inside the pipe will be equal to the external air pressure or slightly greater than the external air pressure, so that the cut material will not be subject to adsorption on the cutting table. The purpose of setting the pressure relief valve assembly 7 is to quickly make the vacuum degree inside the bed connecting pipe equal to the external air pressure, thereby shortening the delay of the back blowing.

[0043] In addition, in the present application, the back-blowing wind force can be controlled by adjusting the opening of the pressure relief valve assembly 7. When the pressure relief valve assembly 7 is not open, the vacuum degree in the vacuum pump suction pipe 2 is relatively large, and the positive pressure gas in the vacuum pump outlet pipe 3 enters the vacuum pump suction pipe 2 through the return air pipe 6, which is mainly used to balance the vacuum degree in the vacuum pump suction pipe 2, that is, to offset part of the adsorption force on the cut material. However, since the vacuum pump 1 continues to work, the adsorption force may be partially offset, and the cut material will still be adsorbed on the cutting table, only the adsorption force is reduced.

[0044] When the pressure relief valve assembly 7 is partially opened, the vacuum degree in the vacuum pump suction pipe 2 decreases, and the positive pressure gas in the vacuum pump outlet pipe 3 enters the vacuum pump suction pipe 2 through the return air pipe 6 to first balance the vacuum degree in the vacuum pump suction pipe 2, and then the remaining part will enter the cutting table through the bed connecting pipe, completely offsetting the adsorption force of the cut material. At this time, the cut material is neither subjected to suction nor blowing force on the cutting table.

[0045] When the pressure relief valve assembly 7 is mostly opened, the vacuum degree in the vacuum pump suction pipe 2 is further reduced, and the positive pressure gas in the vacuum pump outlet pipe 3 enters the vacuum pump suction pipe 2 through the return air pipe 6 to first balance the vacuum degree in the vacuum pump suction pipe 2, and then the remaining part will enter the cutting table through the bed connecting pipe. The remaining positive pressure gas is greater than the adsorption force of the cut material, and at this time the cut material is only subjected to blowing force on the cutting table.

[0046] When the pressure relief valve assembly 7 is fully opened, the state at this time is the same as when the pressure relief valve assembly 7 is mostly open, the only difference being that the blowing force on the material is greater. However, in this application, since the vacuum pump outlet pipe 3 is connected to the silencer pipe 4, the gas pressure in the return air pipe 6 is basically the same as the external pressure. That is, when the pressure relief valve assembly 7 is mostly open or fully open, the blowing force on the material will not be greater than the suction force on the material. In other words, when the pressure relief valve assembly 7 is mostly open or fully open, the state of the material is basically the same as when it is neither subject to suction nor blowing force.

[0047] The utility model relates to a vacuum active adjustable pressure relief structure in a cutting table and a cutting table. First, the material to be cut is placed on the cutting table, and the vacuum pump 1 is started. The vacuum pump 1 generates negative pressure suction, and the negative pressure suction appears on the lower side of the cutting table through the vacuum pump suction pipe 2 and the bed connecting pipe. Then, negative pressure vacuum adsorption is achieved on the material on the cutting table, and the material is adsorbed on the cutting table, that is, the positive suction function of the vacuum pump 1 is achieved; the air sucked in the vacuum pump suction pipe 2 is transported by the vacuum pump 1, enters the vacuum pump outlet pipe 3, and is discharged into the atmosphere after being silenced by the silencer pipe 4 (at this time, the return air pipe 6 is in a blocked state, or only a small amount of air is taken in, which has little effect on the adsorption value of the material on the cutting table), and then the cutting knife of the cutting table cuts the material; Figure 6 shown.

[0048] After the air in the duct is opened, the air in the duct is returned to the air outlet 2 of the vacuum pump 1, and the air in the duct is returned to the air outlet 2 of the vacuum pump 1. Figure 7 When the vacuum pump 1 blows air back to the cutting table, the negative pressure adsorption force of the cut material on the cutting table is reduced, and the operator can remove the cut material from the cutting table manually or through a robotic arm.

[0049] Finally, when the materials used for cutting are different, that is, the quality of the materials has changed, the operator can adjust the stroke of the pressure relief valve reciprocating cylinder 707 through the control system, thereby adjusting the distance that the pressure relief valve exhaust pin 706 pushes the pressure relief valve head sealing block 703, that is, adjusting the opening of the pressure relief valve, and then realizing the adjustment of the back-blowing wind force, so as to adapt to the back-blowing wind force of materials of different materials and different qualities.

[0050] The utility model relates to a vacuum active adjustable pressure relief structure in a cutting table and a cutting table. During the reverse blowing process, the pressure relief valve assembly 7 can be opened to quickly remove the excess pressure inside the bed connecting pipe, which helps to quickly carry out the reverse blowing. The opening of the pressure relief valve assembly 7 is flexibly adjusted by the pressure relief valve reciprocating cylinder 707. By changing the opening of the pressure relief valve, the size of the reverse blowing wind force can be changed, thereby adapting to cutting materials of different materials and having a wide range of adaptability.

[0051] In summary, the present invention effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0052] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A vacuum active adjustable pressure relief structure in a cutting table, applied to the cutting table; the cutting table comprises a vacuum pump (1), a vacuum pump suction pipe (2), a vacuum pump outlet pipe (3), and a bed connecting pipe, one end of the vacuum pump outlet pipe (3) is connected to the vacuum pump (1); one end of the vacuum pump suction pipe (2) is connected to the vacuum pump (1), and the other end is connected to the bed connecting pipe; the end of the bed connecting pipe away from the vacuum pump suction pipe (2) is arranged on the lower side of the cutting table of the cutting table; the characteristics are: A pressure relief valve assembly (7) is provided on the vacuum pump suction pipe (2), and the pressure relief valve assembly (7) comprises a pressure relief valve housing (701), a pressure relief valve internal spring (702), a pressure relief valve head sealing block (703), a pressure relief valve reciprocating cylinder (707), a pressure relief valve reciprocating cylinder piston shaft (708), a pressure relief valve exhaust ejector pin (706), and a pressure relief valve reciprocating cylinder mounting sleeve (705). The pressure relief valve internal spring (702) is provided in the pressure relief valve housing (701), the pressure relief valve head sealing block (703) is provided in the pressure relief valve housing (701), and the pressure relief valve head sealing block (703) is connected to the pressure relief valve. The spring (702) inside the valve abuts against the end of the pressure relief valve housing (701); the pressure relief valve reciprocating cylinder mounting sleeve (705) is connected to the outer peripheral surface of the pressure relief valve housing (701), and the pressure relief valve reciprocating cylinder (707) is fixedly connected to the pressure relief valve reciprocating cylinder mounting sleeve (705); the pressure relief valve reciprocating cylinder piston shaft (708) is slidably arranged in the pressure relief valve reciprocating cylinder (707), and the pressure relief valve exhaust ejector pin (706) is arranged on the pressure relief valve reciprocating cylinder piston shaft (708), and under the action of the pressure relief valve reciprocating cylinder piston shaft (708), the pressure relief valve head sealing block (703) is pushed open.

2. The vacuum active adjustable pressure relief structure in a cutting table according to claim 1, characterized in that: A pressure relief valve silencer sleeve (704) is further provided between the pressure relief valve housing (701) and the pressure relief valve re-actuating cylinder mounting sleeve (705); screw threads are provided on the outer circumference of the pressure relief valve housing (701); a threaded hole is provided in the pressure relief valve silencer sleeve (704); the pressure relief valve silencer sleeve (704) is fastened to the end of the pressure relief valve housing (701) via the screw threads and the threaded hole; screw threads are provided on the outer circumference of the pressure relief valve re-actuating cylinder mounting sleeve (705); the pressure relief valve re-actuating cylinder mounting sleeve (705) is fastened to the end of the pressure relief valve silencer sleeve (704) away from the pressure relief valve housing (701) via the screw threads and the threaded hole.

3. The vacuum active adjustable pressure relief structure in a cutting table according to claim 1, characterized in that: A transfer tube (201) is also provided on the vacuum pump suction pipe (2), and the pressure relief valve housing (701) is connected to the vacuum pump suction pipe (2) via the transfer tube (201).

4. A cutting table comprising the vacuum active adjustable pressure relief structure in a cutting table according to any one of claims 1 to 3, characterized in that: The cutting table comprises a micro-blowing assembly silencer box, the micro-blowing assembly silencer box comprising a box body, a silencer pipe (4), a return air pipe (6), and a return air pipe blocking component (5), the vacuum pump air suction pipe (2) and the vacuum pump air outlet pipe (3) are both arranged in the box body; the vacuum pump air outlet pipe (3) and the vacuum pump air suction pipe (2) are connected via the return air pipe (6), and the return air pipe blocking component (5) is used to control the opening and closing of the return air pipe (6).

5. The cutting table according to claim 4, characterized in that: The silencer pipe (4) comprises a U-shaped pipe body (401) and a silencer air outlet (402); the U-shaped pipe body (401) is arranged in a box; one end of the U-shaped pipe body (401) is connected to the vacuum pump air outlet pipe (3); and the other end of the U-shaped pipe body (401) is connected to the atmosphere through the silencer air outlet (402).

6. The cutting table according to claim 5, characterized in that: The vacuum pump air outlet pipe (3) and the vacuum pump air suction pipe (2) are parallel to each other, the U-shaped tube body (401) is arranged above the vacuum pump air suction pipe (2) and the vacuum pump air outlet pipe (3), and the U-shaped tube body (401) and the vacuum pump air suction pipe (2) are perpendicular to each other in space.

7. The cutting table according to claim 4, characterized in that: The return air duct blocking assembly (5) comprises a return air duct blocking cylinder (501), a return air duct blocking cylinder piston shaft (502), and a return air duct plug (503); the return air duct blocking cylinder (501) is arranged on the vacuum pump outlet pipe (3); the return air duct blocking cylinder piston shaft (502) is slidably arranged in the return air duct blocking cylinder (501); the return air duct plug (503) is arranged on the return air duct blocking cylinder piston shaft (502); and the return air duct plug (503) can block the return air duct (6) under the movement of the return air duct blocking cylinder piston shaft (502).

8. The cutting table according to claim 4, characterized in that: A vacuum pump placement box (101) is also provided in the cutting table. The vacuum pump (1) is provided in the vacuum pump placement box (101). The vacuum pump placement box (101) is fixedly connected to a box body of a micro-blowing component silencer box. Heat dissipation holes (102) are provided on the outer peripheral surface of the vacuum pump placement box (101).

9. The cutting table according to claim 4, characterized in that: The cutting table is also provided with a control system, which is connected to the pressure relief valve re-actuating cylinder (707) and the return air duct blocking component (5) and is used to control the operation of the pressure relief valve re-actuating cylinder (707) and the return air duct blocking component (5).

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