Liquid discharging and pressure stabilizing device of vacuum clamp system

Abstract

A liquid drainage pressure stabilizing device of a vacuum clamp system is characterized by comprising a gas-liquid separator, a liquid drainage tank, a vacuum generator and the like. And the separator is communicated with the liquid discharge tank through a liquid path and a gas path, so that smooth gas-liquid separation is realized. The liquid discharge tank is disconnected from the gas-liquid separator during liquid discharge, so that the negative pressure of the vacuum clamp system is prevented from being influenced; meanwhile, the separator continues to work, and continuous operation of the system is not affected. And workshop compressed air is introduced into the liquid discharge tank to discharge the liquid. The vacuum generator quickly reduces the negative pressure difference between the liquid discharge tank and the gas-liquid separator, so that the vacuum degree index of the gas-liquid separator is prevented from being reduced; and the pipeline with the inner diameter of 2mm controls the flow rate of air when the liquid discharge tank and the gas-liquid separator are recovered to be communicated, so that the vacuum degree is prevented from severely fluctuating. According to the utility model, non-stop automatic filtration and rapid discharge of gas and liquid are realized, and the negative pressure of the system is kept stable; meanwhile, consumable replacement is not needed, and continuous long-time work can be achieved; the negative pressure continuity and stability are guaranteed, and key support is provided for continuous and long-time high-quality production.

Description

Technical Field

[0001] This utility model relates to the field of vacuum fixture applications in the precision machine tool industry, specifically to a draining and pressure stabilizing device for a vacuum fixture system; the vacuum fixture system automatically filters and rapidly discharges gas and liquid without stopping the machine, while maintaining stable negative pressure; at the same time, it does not require replacement of consumables and can work continuously for a long time; it ensures the continuity and stability of negative pressure in the vacuum fixture system, providing key support for continuous and long-term high-quality production operations. Background Technology

[0002] With the rapid development of the short video media industry and the electronic display industry, the application of thin glass for display purposes is increasing dramatically, leading to an unprecedented surge in demand for equipment related to the processing of thin glass. Vacuum clamping systems are key equipment for precision machine tools to clamp thin-film parts; currently, many large professional manufacturing companies extensively use vacuum clamping systems when processing display glass for products such as mobile phones and tablets on precision machine tools.

[0003] However, vacuum clamping systems suffer from limitations in practical applications, including restricted scope and low efficiency. Issues such as large negative pressure fluctuations during automatic drainage, short continuous operating times, and short maintenance cycles exist. Large negative pressure fluctuations lead to unstable suction in the vacuum clamps, causing displacement of processed parts and even equipment damage, severely reducing production quality and efficiency. Short continuous operating times prevent the system from meeting the requirements for long-term, continuous precision machining of certain parts. Therefore, the existing problems with vacuum clamping systems are a significant bottleneck in improving the machining quality of thin-film parts such as glass, greatly hindering the development and application of electronic display systems. Utility Model Content

[0004] The purpose of this invention is to provide a draining and pressure stabilizing device for a vacuum clamping system, so as to solve the problems of limited application scope and low quality and efficiency of vacuum clamping systems in practical applications.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A liquid draining and pressure stabilizing device for a vacuum clamping system includes a gas-liquid separator 1, a drain tank 10, a liquid level sensor 9, a pressure reducing valve 2, a first pneumatic valve 12 and a second pneumatic valve 13, a first solenoid valve 4, a second solenoid valve 5, a third solenoid valve 6, a fourth solenoid valve 7, a vacuum generator 8, a valve mounting plate 3, and a base 11. The gas-liquid separator 1 is mounted on top of the base 11, and the drain tank 10 is mounted below it. The valve mounting plate 3 is fixed to the front of the gas-liquid separator 1. The valve mounting plate 3 is equipped with the pressure reducing valve 2, the first solenoid valve 4, the second solenoid valve 5, the third solenoid valve 6, the fourth solenoid valve 7, and two vacuum generators 8, arranged sequentially from top to bottom. The first pneumatic valve 12 and the second pneumatic valve 13 are mounted on the right side of the base. The liquid level sensor 9 is mounted on the front of the drain tank 10.

[0007] Furthermore, the separator inlet 101 is connected to the machine tool's vacuum fixture via the device's air inlet pipe 201; the separator outlet tee connector 203 is connected to the negative pressure air source via the device's air outlet pipe 204.

[0008] Furthermore, the inner diameter of the first separation air passage pipe 205 between the right port of the second solenoid valve 5 and the three-way connector 203 at the air outlet of the separator is 2mm.

[0009] Furthermore, the separator drain port 105 is connected to the drain tank drain port connector 216 via the first pneumatic valve 12; the drain tank drain port connector 216 is connected to the atmospheric environment via the second pneumatic valve 13; and the separator outlet tee connector 203 is connected to the drain tank upper four-way connector 217 via the second solenoid valve 5.

[0010] Furthermore, the pressure reducing valve inlet connector 302 is connected to the workshop compressed air supply pipeline via the compressed air inlet pipe 301; the right port of the pressure reducing valve 2 is connected to the detection port tee connector 306 and the upper four-way connector 217 of the drain tank via the first solenoid valve 4 and two pipelines respectively.

[0011] Furthermore, the second gas path three-way connector 402 is connected to the two generator positive pressure ports 410 via the fourth solenoid valve 7 and two pipelines; the two generator negative pressure ports 411 are connected to the upper four-way connector 217 of the drain tank via the third solenoid valve 6 and two pipelines.

[0012] Furthermore, the first air passage tee connector 401 is connected to the first pneumatic valve pneumatic interface 503 and the second pneumatic valve pneumatic interface 505 via the third air passage tee connector 502 and two pipelines respectively.

[0013] Furthermore, the internal space of the gas-liquid separator 1 is divided into two parts: the upper part is the vortex flow channel 103, and the lower part is the liquid storage space 104.

[0014] Furthermore, the first pneumatic valve 12 and the second pneumatic valve 13 are ball valves driven by an electromagnetically controlled cylinder.

[0015] Furthermore, the first pneumatic valve 12 is installed at a height lower than the separator drain port 105 and higher than the four-way connector 217 on the upper side of the drain tank; the second pneumatic valve 13 is installed at a height lower than the drain port connector 216 of the drain tank.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] 1) This utility model combines a gas-liquid separator and a drain tank, along with a valve group and auxiliary components, to achieve automatic filtration and drainage of the vacuum clamp system without stopping the machine, while maintaining stable negative pressure and continuous long-term operation.

[0018] 2) The gas-liquid separator of this utility model works by mechanical centrifugal separation or baffle flow separation, without the need for external drive devices or replacement of consumable filter elements. It has high separation efficiency and low operating cost, and ensures that the system can run continuously for a long time.

[0019] 3) The control part of the pneumatic valve of this utility model is electromagnetic, the actuation part is cylinder, and the sealing structure adopts ball valve form; the valve is easy to control, has good self-locking performance, and the pressure difference direction between the inlet and outlet is not restricted. When the internal pressure of the device changes frequently, it can accurately and reliably realize the opening and closing of the pipeline; the ball valve has a large flow diameter and low resistance, which facilitates the discharge of internal dirty liquids and solids and avoids accumulation and blockage.

[0020] 4) Before draining the liquid from this practical drain tank, completely isolate the drain tank from the gas-liquid separator and the vacuum clamp system to avoid affecting the negative pressure of the vacuum clamp system. Then, use positive pressure draining method, reduce the pressure of the workshop compressed air to slightly higher than atmospheric pressure through the pressure reducing valve, and introduce it into the drain tank to break the negative pressure and establish positive pressure, so that the liquid accumulated in the drain tank can be smoothly discharged into the atmosphere.

[0021] The compressed air in the workshop is reduced to a pressure slightly higher than atmospheric pressure by a pressure reducing valve. This prevents the liquid inside the drain tank from splashing due to excessive pressure, which would cause dirty liquid and small particles to adhere to the top of the drain tank and the connecting pipes, making it difficult to discharge and causing pipe blockage. In addition, it also prevents the liquid from being violently impacted and splashed when discharged into the atmosphere through the device's outlet pipe due to excessive pressure.

[0022] After passing through the first solenoid valve, the compressed air is divided into two paths. One path passes through the liquid level sensor and enters the drain tank. Positive pressure air can be used to purge and clean the detection head of the liquid level sensor to prevent dirty liquid from sticking and affecting the detection function. The other path enters through the four-way connector on the upper side of the drain tank, increasing the flow rate of compressed air and improving the drainage speed of the drain tank, thereby improving the overall working efficiency of the device.

[0023] 5) The drain tank of this utility model is connected to the vacuum generator. The vacuum generator has the characteristics of high pumping speed and low vacuum degree; after the draining is completed, the vacuum generator can quickly extract most of the air inside the drain tank, so that the drain tank reaches a medium-low vacuum degree state, which greatly reduces the negative pressure difference between the drain tank and the gas-liquid separator; when the drain tank and the gas-liquid separator are reconnected in the future, it avoids a significant exponential drop in the vacuum degree inside the gas-liquid separator due to the intake of a large amount of air, which plays a key role in maintaining the negative pressure stability of the vacuum clamp system.

[0024] 6) The first separation gas passage pipe between the right side port of the second solenoid valve and the three-way connector at the outlet of the gas-liquid separator has an internal diameter of 2mm and high flow resistance. It is used to control the instantaneous air flow speed when the drain tank with medium and low vacuum is connected to the gas-liquid separator with high vacuum, so as to avoid sudden and drastic fluctuations in the vacuum of the gas-liquid separator and further maintain the negative pressure stability of the vacuum clamp system. Attached Figure Description

[0025] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0026] Figure 1 This is a perspective view of the present utility model;

[0027] Figure 2 This is a cross-sectional view of the internal structure of the gas-liquid separator of this utility model;

[0028] Figure 3 This is a structural diagram of the gas-liquid separation part of this utility model;

[0029] Figure 4 This is a structural diagram of the positive pressure drainage section of this utility model;

[0030] Figure 5 This is a structural diagram of the vacuum generator's vacuum pumping section of this utility model;

[0031] Figure 6 This is a structural diagram of the compressed air pipeline driven by the pneumatic valve of this utility model;

[0032] Wherein: 1-Gas-liquid separator, 2-Pressure reducing valve, 3-Valve mounting plate, 4-First solenoid valve, 5-Second solenoid valve, 6-Third solenoid valve, 7-Fourth solenoid valve, 8-Vacuum generator, 9-Liquid level sensor, 10-Drain tank, 11-Base, 12-First pneumatic valve, 13-Second pneumatic valve; 101-Separator inlet, 102-Separator outlet, 103-Vortex flow channel, 104-Liquid storage space, 105-Separator drain port; 201-Equipment inlet pipe, 20 2-Separator inlet connector, 203-Separator outlet tee connector, 204-Unit outlet pipe, 205-First separation gas path pipe, 206-Second separation gas path pipe, 207-Separator drain port connector, 208-First separation liquid path pipe, 209-First pneumatic valve inlet connector, 210-First pneumatic valve outlet connector, 211-Second separation liquid path pipe, 212-Unit drain pipe, 213-Second pneumatic valve outlet connector, 214-Second pneumatic valve inlet tee connector, 2 15-Third separation liquid circuit pipe; 216-Drainage tank drain port connector; 217-Drainage tank upper four-way connector; 301-Compressed air inlet pipe; 302-Pressure reducing valve inlet connector; 303-First compressed air pipe; 304-Second compressed air pipe; 305-Third compressed air pipe; 306-Detection port three-way connector; 401-First air circuit three-way connector; 402-Second air circuit three-way connector; 403-First vacuum air circuit; 404-Third solenoid valve outlet three-way connector; 40 5-Fourth solenoid valve outlet tee connector; 406-Second vacuum passage; 407-Third vacuum passage; 408-Fourth vacuum passage; 409-Fifth vacuum passage; 410-Generator positive pressure port; 411-Generator negative pressure port; 412-Sixth vacuum passage; 501-First pneumatic pipeline; 502-Third pneumatic passage tee connector; 503-First pneumatic valve pneumatic interface; 504-Second pneumatic pipeline; 505-Second pneumatic valve pneumatic interface; 506-Third pneumatic pipeline. Detailed Implementation

[0033] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0034] The following detailed description is exemplary and intended to provide further detailed explanation of the present invention. Unless otherwise specified, all technical terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention.

[0035] The purpose of this invention is to provide a draining and pressure stabilizing device for a vacuum clamping system, which solves the problems of limited application scope and low quality and efficiency in practical applications of vacuum clamping systems, ensures the negative pressure stability of the vacuum clamping system, and provides important support for high-quality machine tool production operations.

[0036] Please see Figure 1-6 This utility model provides a technical solution:

[0037] A draining and pressure-stabilizing device for a vacuum clamp system includes a gas-liquid separator 1, a base 11, and a drain tank 10. The gas-liquid separator 1 is mounted above the base 11, and the drain tank 10 is mounted below it. A valve mounting plate 3 is fixed to the front of the gas-liquid separator 1. From top to bottom, the valve mounting plate 3 is equipped with a pressure reducing valve 2, a first solenoid valve 4, a second solenoid valve 5, a third solenoid valve 6, a fourth solenoid valve 7, and two vacuum generators 8. A first pneumatic valve 12 and a second pneumatic valve 13 are mounted on the right side of the base. The first pneumatic valve 12 is installed at a height lower than the gas-liquid separator 1 but higher than the drain tank 10, while the second pneumatic valve 13 is installed at a height lower than the drain tank 10. These valves and components play a crucial role in the draining and pressure stabilization of the device.

[0038] Except for the second solenoid valve 5 and the first pneumatic valve 12, which are normally open, all other solenoid valves and pneumatic valves are normally closed.

[0039] Please see Figure 2 The gas-liquid separator 1 has an internal structure divided into two parts: the upper part includes a vortex channel 103, and the lower part is a liquid storage space 104. After the gas carrying the liquid enters from the separator inlet 101, it first passes through the vortex channel 103 and rotates downwards. Due to its large inertia, the liquid separates out during the rotation and accumulates in the lower liquid storage space 104, and is discharged from the separator drain port 105. Then, the gas flows upward through the central circular tube and flows out from the separator outlet 102, realizing consumable-free gas-liquid separation and enabling continuous separation work for a long time.

[0040] Please see Figure 3 The gas-liquid separator 1 has a separator inlet connector 202 installed on the left side and a separator outlet tee connector 203 installed on the right side; the separator inlet connector 202 has an inlet pipe 201 on the left side, which is connected to the user's vacuum clamp; the separator outlet tee connector 203 has an outlet pipe 204 on the right side, which is connected to the user's negative pressure gas source such as a vacuum pump.

[0041] A separator drain port connector 207 is installed on the lower side of the gas-liquid separator 1, which is connected to the inlet connector 209 of the first pneumatic valve via the first separation liquid passage pipe 208; a second separation liquid passage pipe 211 is installed on the outlet connector 210 of the first pneumatic valve, which is connected to the upper port of the inlet tee connector 214 of the second pneumatic valve; the left side of the inlet tee connector 214 of the second pneumatic valve is connected to the drain port connector 216 of the drain tank via the third separation liquid passage pipe 215.

[0042] The upper port of the separator outlet tee connector 203 is equipped with a first separation gas pipe 205, which is connected to the right port of the second solenoid valve 5; the left port of the second solenoid valve 5 is equipped with a second separation gas pipe 206, which is connected to the upper four-way connector 217 of the drain tank.

[0043] Therefore, the liquid separated inside the gas-liquid separator 1 can flow into the drain tank 10 through the first pneumatic valve 12, while the air in the drain tank 10 flows into the gas-liquid separator 1 through the second solenoid valve 5, realizing the transfer and storage of the separated liquid, providing the basic conditions for subsequent isolation and positive pressure drainage.

[0044] Please see Figure 4 The pressure reducing valve inlet connector 302 is equipped with a compressed air inlet pipe 301, which is connected to the compressed air supply pipeline in the user's workshop. The right port of the pressure reducing valve 2 is equipped with a first compressed air pipe 303, which is connected to the right inlet of the first solenoid valve 4; the left outlet of the first solenoid valve 4 has a tee connector, and is equipped with a second compressed air pipe 304 and a third compressed air pipe 305, which are respectively connected to the four-way connector 217 on the upper side of the drain tank and the tee connector 306 at the detection port.

[0045] Combination Figure 3 The drain pipe 212 of the device is installed on the right side of the outlet connector 213 of the second pneumatic valve, which is connected to the atmospheric environment.

[0046] Therefore, when the liquid level sensor 9 detects that the liquid inside the drain tank 10 has reached a high level, the second solenoid valve 5 and the first pneumatic valve 12 are closed, thus isolating the drain tank 10 from the gas-liquid separator 1 and preventing the drain tank 10 from adversely affecting the stability of the negative pressure inside the gas-liquid separator 1.

[0047] During this period, the gas-liquid separation of the gas-liquid separator 1 did not stop, and the separated liquid accumulated in the liquid storage space 104 below the gas-liquid separator 1; thus achieving the goal of continuous long-term operation without stopping the vacuum clamp system when automatically draining liquid.

[0048] Next, the compressed air supplied to the workshop is reduced to a pressure slightly above atmospheric pressure via pressure reducing valve 2. The first solenoid valve 4 opens, and the compressed air purges and cleans the detection head of the liquid level sensor 9 through the three-way connector 306 at the detection port. Simultaneously, the flow rate into the drain tank 10 is increased through the four-way connector 217 on the upper side of the drain tank. The compressed air entering the drain tank 10 breaks the original negative pressure and establishes positive pressure. 0.5 seconds after the first solenoid valve 4 opens, the second pneumatic valve 13 opens to prevent backflow through the device drain pipe 212 before the negative pressure in the drain tank 10 is broken and positive pressure is established. Under positive pressure, the accumulated liquid inside the drain tank 10 is discharged through the second pneumatic valve 13 and the device drain pipe 212. After drainage is complete, the second pneumatic valve 13 closes, achieving the goal of rapid drainage with low pressure and high flow rate.

[0049] Please see Figure 5 The first vacuum passage 403 is installed at the front port of the second air passage tee connector 402 and is connected to the left port of the fourth solenoid valve 7; the fourth solenoid valve outlet tee connector 405 is connected to the two generator positive pressure ports 410 through the fourth vacuum passage 408 and the fifth vacuum passage 409 respectively.

[0050] The two generator negative pressure ports 411 are equipped with a second vacuum passage 406 and a third vacuum passage 407, which are connected to the outlet tee connector 404 of the third solenoid valve; the left port of the third solenoid valve 6 is connected to the upper four-way connector 217 of the drain tank through the sixth vacuum passage 412.

[0051] Therefore, after the drain tank 10 completes the draining action, the fourth solenoid valve 7 and the third solenoid valve 6 open simultaneously; compressed air enters the positive pressure port 410 of the generator, generating negative pressure at the negative pressure port 411 of the generator. This negative pressure is then drawn out of the drain tank by the third solenoid valve 6, reaching a low to medium negative pressure state; then the fourth solenoid valve 7 and the third solenoid valve 6 close simultaneously. Thus, the vacuum generator 8, using a low negative pressure and high flow rate, completes the first step of rapid restoration of the negative pressure in the drain tank 10, greatly reducing the negative pressure difference between the drain tank and the gas-liquid separator. This prevents a significant exponential drop in the vacuum level inside the gas-liquid separator due to the intake of a large amount of air when the drain tank and the gas-liquid separator are subsequently reconnected, playing a crucial role in maintaining the stability of the negative pressure in the vacuum clamp system.

[0052] Combined Figure 3 When the second solenoid valve 5 is opened, the air inside the drain tank 10 needs to pass through the first separation air passage 205 with a small diameter and high flow resistance before entering the gas-liquid separator 1. In a low-cost manner, without adding other hardware, the instantaneous air flow speed when the drain tank 10 with low vacuum degree and the gas-liquid separator 1 with high vacuum degree are initially restored to communication is controlled, so as to avoid sudden large and violent fluctuations in the vacuum degree of the gas-liquid separator 1 and further maintain the negative pressure stability of the vacuum clamp system.

[0053] After the second solenoid valve 5 opens for 3 seconds, the first pneumatic valve 12 opens, completely restoring the connection between the drain tank 10 and the gas-liquid separator 1. The accumulated liquid in the storage space 104 flows back into the drain tank 10 through the first pneumatic valve 12. Thus, one automatic drainage and pressure stabilization operation is completed, achieving the goal of automatic filtration and drainage of the vacuum clamp system without stopping the machine, while maintaining stable negative pressure for continuous long-term operation.

[0054] Please see Figure 6 A first pneumatic pipe 501 is installed at the rear port of the first air passage tee connector 401, connecting to the upper port of the third air passage tee connector 502; a third pneumatic pipe 506 is installed at the front port of the third air passage tee connector 502, connecting to the pneumatic interface 503 of the first pneumatic valve; a second pneumatic pipe 504 is installed at the lower port of the third air passage tee connector 502, connecting to the pneumatic interface 505 of the second pneumatic valve. Therefore, compressed air required for operation is supplied to the first pneumatic valve 12 and the second pneumatic valve 13.

Claims

1. A draining and pressure stabilizing device for a vacuum clamping system, characterized in that... It includes a gas-liquid separator (1), a drain tank (10), a liquid level sensor (9), a pressure reducing valve (2), a first pneumatic valve (12) and a second pneumatic valve (13), a first solenoid valve (4), a second solenoid valve (5), a third solenoid valve (6), a fourth solenoid valve (7), a vacuum generator (8), a valve mounting plate (3), and a base (11). The gas-liquid separator (1) is installed on the top of the base (11), and the drain tank (10) is installed on the bottom. The valve mounting plate (3) is fixed on the front side of the gas-liquid separator (1). The pressure reducing valve (2), the first solenoid valve (4), the second solenoid valve (5), the third solenoid valve (6), the fourth solenoid valve (7), and two vacuum generators (8) are installed on the valve mounting plate (3) from top to bottom. The first pneumatic valve (12) and the second pneumatic valve (13) are installed on the right side of the base. The liquid level sensor (9) is installed on the front side of the drain tank (10).

2. The draining and pressure stabilizing device for a vacuum clamping system according to claim 1, characterized in that, The separator inlet (101) is connected to the vacuum fixture of the machine tool via the device inlet pipe (201); the separator outlet tee connector (203) is connected to the negative pressure gas source via the device outlet pipe (204).

3. The draining and pressure stabilizing device for a vacuum clamping system according to claim 2, characterized in that, The inner diameter of the first separation air passage pipe (205) between the right side port of the second solenoid valve (5) and the three-way connector (203) of the separator outlet is 2mm.

4. The draining and pressure stabilizing device for a vacuum clamp system according to claim 1, characterized in that, The separator drain port (105) is connected to the drain port connector (216) of the drain tank via the first pneumatic valve (12); the drain port connector (216) of the drain tank is connected to the atmospheric environment via the second pneumatic valve (13); the separator outlet tee connector (203) is connected to the upper four-way connector (217) of the drain tank via the second solenoid valve (5).

5. The draining and pressure stabilizing device for a vacuum clamping system according to claim 1, characterized in that, The pressure reducing valve inlet connector (302) is connected to the compressed air supply pipeline of the workshop via the compressed air inlet pipe (301); the right port of the pressure reducing valve (2) is connected to the detection port tee connector (306) and the upper four-way connector (217) of the drain tank via the first solenoid valve (4) and two pipelines respectively.

6. The draining and pressure stabilizing device for a vacuum clamping system according to claim 1, characterized in that, The second gas path three-way connector (402) is connected to the two generator positive pressure ports (410) through two pipes via the fourth solenoid valve (7); the two generator negative pressure ports (411) are connected to the upper four-way connector (217) of the drain tank through two pipes via the third solenoid valve (6).

7. The draining and pressure stabilizing device for a vacuum clamping system according to claim 1, characterized in that, The first air passage tee connector (401) is connected to the first pneumatic valve pneumatic interface (503) and the second pneumatic valve pneumatic interface (505) via two pipes through the third air passage tee connector (502).

8. The draining and pressure stabilizing device for a vacuum clamping system according to claim 1, characterized in that, The gas-liquid separator (1) has an internal space divided into two parts: the upper part is a vortex flow channel (103) and the lower part is a liquid storage space (104).

9. The draining and pressure stabilizing device for a vacuum clamping system according to claim 1, characterized in that, The first pneumatic valve (12) and the second pneumatic valve (13) are ball valves driven by electromagnetically controlled cylinders.

10. The draining and pressure stabilizing device for a vacuum clamping system according to claim 1, characterized in that, The first pneumatic valve (12) is installed at a height lower than the separator drain port (105) and higher than the four-way connector (217) on the upper side of the drain tank; the second pneumatic valve (13) is installed at a height lower than the drain port connector (216) of the drain tank.

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