Vacuum fine-tuning control device for low-temperature test

Abstract

The utility model discloses a vacuum fine-tuning control device for low-temperature test, which comprises a bottom frame and a frame fixed at the top end of the bottom frame, a control box fixed on the back of the frame, a rear vacuum box mounted on one side of the bottom of the frame, and a rear driving box mounted on the back of the rear vacuum box. A front sealing plate is installed on the outer wall of one side of the bottom frame through a sliding supporting piece, a front vacuum box used for forming a vacuum cavity with the rear vacuum box is fixed to the outer wall of the side, close to the rear vacuum box, of the front sealing plate, and a concentric-square-shaped sealing edge is arranged on the outer side of the front vacuum box. The opening wall edge of the rear vacuum box is provided with a concentric-square-shaped slot used for being embedded with the concentric-square-shaped sealing edge in a sleeved mode. According to the utility model, the front vacuum box and the rear vacuum box are mutually sleeved and sealed, and the concentric-square-shaped sealing edge is arranged at the joint of the front vacuum box and the rear vacuum box, so that the sealing performance can be greatly improved, and compared with a door frame and a door body which are simply and additionally provided with sealing rings, the design can better ensure the sealing performance and reduce the risk of gas leakage.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuuming, in particular to a vacuum fine-tuning control device for low-temperature testing. Background Art

[0002] The vacuum fine-tuning control device for low-temperature testing is a key device composed of a vacuum chamber, a cooling system, a heating system, a vacuum pump and a fine-tuning control system. Its structure includes a sealed vacuum chamber for creating a high vacuum environment, a cooling system for lowering the ambient temperature through a refrigeration cycle, a heating system for locally heating samples or equipment, and a vacuum pump for extracting gas from the vacuum chamber. The fine-tuning control system monitors and adjusts parameters such as temperature and pressure to ensure the stability of the test environment. Its working principle mainly involves the refrigeration cycle absorbing heat to cool down, the vacuum pump extracting gas to form a high vacuum, and the temperature control system adjusting the heater power to maintain a stable temperature. However, in the current vacuum fine-tuning control device, in order to make the vacuum chamber in a sealed state, a sealing ring that can be interlocked with each other is generally added to the opening of its own box and the back of the door for sealing. If the sealing ring is improperly installed or the sealing ring is not well matched with the box or door, it will cause a loose seal, resulting in gas leakage or unstable vacuum. As the temperature changes, the material properties of the sealing ring also change, resulting in a decrease in sealing performance. Especially in a low-temperature environment, the elasticity and sealing performance of the sealing ring will be affected. Utility Model Content

[0003] The purpose of the utility model is to provide a vacuum fine-tuning control device for low-temperature testing, wherein a rear vacuum box is arranged inside a frame, and a front vacuum box that can be mutually fitted and sealed with the rear vacuum box is slidably arranged in front of the frame to form a sealed vacuum chamber, and a circle of circular edge sealing is arranged at the connection between the two to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a vacuum fine-tuning control device for low-temperature testing, comprising a bottom frame and a frame fixed at the top of the bottom frame, a control box being fixed on the back of the frame, a rear vacuum box being installed on one side of the bottom of the frame, and a rear drive box being installed on the back of the rear vacuum box, a front sealing plate being installed on the outer wall of one side of the bottom frame through a sliding support, a front vacuum box for forming a vacuum chamber with the rear vacuum box being fixed on the outer wall of the front sealing plate on one side close to the rear vacuum box, a circular edge sealing being provided on the outer side of the front vacuum box, a circular slot for being nested with the circular edge sealing being provided in the opening wall edge of the rear vacuum box, a vacuum pumping assembly for extracting air from the inside of the vacuum chamber being provided inside the rear drive box, an electric lateral movement unit for pulling the front sealing plate toward the rear vacuum box being installed at the bottom end of the bottom frame, and a control panel electrically connected to the electric lateral movement unit and the input end of the vacuum pumping assembly being installed on the outer wall of one side of the control box.

[0005] Preferably, the sliding support member includes two square tubes fixed on the outer wall of one side of the front sealing plate, and square holes arranged on both sides of the inside of the bottom frame, and one end of the square tube extends to the inside of the square hole.

[0006] Preferably, a rectangular cavity is provided inside the frame above the rear vacuum box, a rubber block is fixed on the outer wall of one side of the front sealing plate close to the frame, and the rubber block and the rectangular cavity are mutually nested.

[0007] Preferably, the vacuum extraction assembly includes a vacuum pump installed at the bottom of the rear drive box, and a Y-shaped exhaust pipe installed equidistantly on the inner wall of one side of the rear drive box, a vertical pipe is installed at the end of the Y-shaped exhaust pipe away from the rear drive box, a switch valve is installed at the bottom end of the vertical pipe, and the outlet end of the switch valve is interconnected with the air inlet of the vacuum pump.

[0008] Preferably, an exhaust check valve is installed at the air outlet of the vacuum pump, and a pressure gauge with one end extending into the interior of the rear vacuum box is installed on the inner wall of one side of the rear drive box.

[0009] Preferably, exhaust pipes are installed on both sides of the interior of the rear vacuum box, and one end of the exhaust pipe passes through the outside of the rear drive box and is interconnected with one end of the Y-shaped exhaust pipe.

[0010] Preferably, the electric transverse movement unit includes a base plate fixed to the bottom end of the bottom frame, and a lead screw linear module installed on the lower surface of the base plate, a guide plate is installed at the movable end of the lead screw linear module, the top of the guide plate is fixedly connected to the outer wall of one side of the front sealing plate, and a servo motor for driving the lead screw linear module is installed on one side of the bottom end of the base plate.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: the vacuum fine-tuning control device for low-temperature testing is provided with a rear vacuum box and a front vacuum box and other structures that cooperate with each other, and realizes the automated operation of the set sealing of the front vacuum box and the rear vacuum box through the combination of a control panel, a servo motor, and a screw linear module. The front vacuum box and the rear vacuum box are set and sealed with each other, and a circular edge seal is arranged at the connection between the two, so that the sealing performance can be greatly improved. Compared with simply adding a sealing ring to the door frame and the door body, this design can better ensure the sealing and reduce the risk of gas leakage, thereby improving the stability and vacuum degree of the vacuum chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0013] Figure 2 It is a side view structural schematic diagram of the utility model;

[0014] Figure 3This is a schematic diagram of the structure of the utility model when viewed from above;

[0015] Figure 4 This is a schematic diagram of the main structure of the vacuum rear box of the utility model;

[0016] Figure 5 This is a rear view structural diagram of the rear drive box of the utility model;

[0017] In the figure: 1. bottom frame; 101. square hole; 2. rack; 3. control box; 301. control panel; 4. rear vacuum box; 401. circular slot; 5. rear drive box; 6. exhaust pipe; 7. square tube; 8. front sealing plate; 801. circular edge sealing; 9. front vacuum box; 10. vacuum pump assembly; 1001. vacuum pump; 1002. exhaust check valve; 1003. Y-type exhaust pipe; 1004. switch valve; 1005. vertical pipe; 11. pressure gauge; 12. bottom plate; 13. screw linear module; 14. guide plate; 15. servo motor. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-5 The utility model provides an embodiment: a vacuum fine-tuning control device for low-temperature testing, comprising a bottom frame 1 and a frame 2 fixed at the top of the bottom frame 1, a control box 3 fixed to the back of the frame 2, a rear vacuum box 4 installed on one side of the bottom of the frame 2, and a rear drive box 5 installed on the back of the rear vacuum box 4, a front sealing plate 8 is installed on the outer wall of one side of the bottom frame 1 through a sliding support, a front vacuum box 9 for forming a vacuum chamber with the rear vacuum box 4 is fixed on the outer wall of the front sealing plate 8 close to the rear vacuum box 4, and a front vacuum box 9 for forming a vacuum chamber with the rear vacuum box 4 is fixed on the outer wall of the front sealing plate 8 close to the rear vacuum box 4. A circular edge seal 801 is arranged on the outside of the vacuum box 9, a circular slot 401 for inserting with the circular edge seal 801 is arranged in the opening wall edge of the rear vacuum box 4, a vacuum pumping assembly 10 for extracting air inside the vacuum chamber is arranged inside the rear driving box 5, an electric lateral movement unit for pulling the front sealing plate 8 toward the rear vacuum box 4 is installed at the bottom end of the bottom frame 1, and a control panel 301 electrically connected to the electric lateral movement unit and the input end of the vacuum pumping assembly 10 is installed on the outer wall of one side of the control box 3;

[0020] Through the combination of the control panel 301, the servo motor 15, and the screw linear module 13, the automatic operation of the set sealing of the front vacuum box 9 and the rear vacuum box 4 is realized;

[0021] The vacuum pumping assembly 10 includes a vacuum pump 1001 installed at the bottom of the rear drive box 5, and a Y-shaped exhaust pipe 1003 equidistantly installed on the inner wall of one side of the rear drive box 5. A standpipe 1005 is installed at one end of the Y-shaped exhaust pipe 1003 away from the rear drive box 5. A switch valve 1004 is installed at the bottom of the standpipe 1005. The outlet end of the switch valve 1004 is connected to the air inlet of the vacuum pump 1001. After the front vacuum box 9 and the rear vacuum box 4 are sealed to form a sealed vacuum chamber, the staff turns on the vacuum pump 1001 in the vacuum pumping assembly 10 through the control panel 301 to work. At this time, the vacuum pump 1001 mechanically extracts the gas in the vacuum chamber and discharges it into the external environment. In this process, the gas in the vacuum chamber passes through the exhaust pipe 6, the Y-shaped exhaust pipe 1003, and the standpipe 1005 in turn and is discharged by the vacuum pump 1001.

[0022] The switch valve 1004 controls the exhaust volume and the vacuum opening and closing. The Y-shaped exhaust pipe 1003 and the vertical pipe 1005 are pipes connecting the vacuum pump 1001 and the vacuum chamber, which play the role of transmitting gas. By continuously extracting and controlling the flow of gas, the pressure and vacuum degree in the vacuum chamber are adjusted to ensure the stability and accuracy of the test environment.

[0023] An exhaust check valve 1002 is installed at the air outlet of the vacuum pump 1001, and a pressure gauge 11 with one end extending to the inside of the rear vacuum box 4 is installed on the inner wall of one side of the rear drive box 5. Exhaust pipes 6 are installed on both sides of the inside of the rear vacuum box 4. One end of the exhaust pipe 6 penetrates to the outside of the rear drive box 5 and is connected to one end of the Y-shaped exhaust pipe 1003. The exhaust check valve 1002 is used to control the flow direction of the gas to ensure that the gas can only be discharged from the vacuum chamber and cannot flow back into the vacuum chamber, thereby ensuring the stability of the vacuum degree. The pressure gauge 11 is used to monitor the pressure changes in the vacuum chamber and provide real-time pressure data;

[0024] The electric lateral movement unit includes a bottom plate 12 fixed to the bottom end of the bottom frame 1, and a screw linear module 13 installed on the lower surface of the bottom plate 12, a guide plate 14 is installed at the movable end of the screw linear module 13, the top end of the guide plate 14 is fixedly connected to the outer wall of one side of the front sealing plate 8, and a servo motor 15 for driving the screw linear module 13 is installed on one side of the bottom end of the bottom plate 12. The control panel 301 can accurately control the movement of the servo motor 15 and the screw linear module 13 to ensure that the sealing process of the front vacuum box 9 and the rear vacuum box 4 is smooth and reliable, so as to achieve the best sealing effect;

[0025] A rectangular cavity is provided inside the frame 2 above the rear vacuum box 4, and a rubber block is fixed on the outer wall of one side of the front sealing plate 8 close to the frame 2, the rubber block and the rectangular cavity are fitted together, and the sliding support includes two square tubes 7 fixed on the outer wall of one side of the front sealing plate 8, and square holes 101 provided on both sides of the bottom frame 1, one end of the square tube 7 extends to the inside of the square hole 101, when the front sealing plate 8 and the front vacuum box 9 move toward the direction of the rear vacuum box 4, the square tube 7 will slide inside the square hole 101, which can effectively reduce the vibration and bumping of the front vacuum box 9 during the movement, and ensure the stable docking of the front vacuum box 9 and the rear vacuum box 4.

[0026] When the embodiment of the present application is in use, the staff first places the workpiece to be tested at a low temperature in the rear vacuum box 4. After the workpiece is adjusted, the staff turns on the servo motor 15 at the bottom end of the bottom frame 1 through the control panel 301 to work, and the servo motor 15 drives the lead screw linear module 13 to move, so that the lead screw linear module 13 drives the guide plate 14, the front sealing plate 8 and the front vacuum box 9 and other components to move in the direction of the rear vacuum box 4, until the front vacuum box 9 enters the rear vacuum box 4, and the circular edge sealing 801 enters the circular slot 401, until the back of the front sealing plate 8 is in contact with the outer side of one side of the frame 2. The wall is close to each other, and the front vacuum box 9 and the rear vacuum box 4 form a sealed chamber for subsequent vacuum extraction. Through the combination of the control panel 301, the servo motor 15, and the lead screw linear module 13, the automatic operation of the set sealing of the front vacuum box 9 and the rear vacuum box 4 is realized. By sealing the front vacuum box 9 and the rear vacuum box 4 with each other and arranging a circular edge seal 801 at the connection between the two, the sealing performance can be greatly improved. Compared with simply adding a sealing ring to the door frame and the door body, this design can better ensure the sealing and reduce the risk of gas leakage, thereby improving the stability and vacuum degree of the vacuum chamber.

Claims

1. A vacuum fine-tuning control device for low-temperature testing, characterized in that: The invention comprises a bottom frame (1) and a frame (2) fixed at the top of the bottom frame (1), a control box (3) being fixed on the back of the frame (2), a rear vacuum box (4) being installed on one side of the bottom of the frame (2), and a rear drive box (5) being installed on the back of the rear vacuum box (4), a front sealing plate (8) being installed on the outer wall of one side of the bottom frame (1) via a sliding support, a front vacuum box (9) being fixed on the outer wall of one side of the front sealing plate (8) close to the rear vacuum box (4) and used for forming a vacuum chamber with the rear vacuum box (4), and a vacuum chamber (9) being arranged on the outer side of the front vacuum box (9) A circular edge seal (801), a circular slot (401) for being inserted into the circular edge seal (801) is arranged in the opening wall of the rear vacuum box (4), a vacuum pumping assembly (10) for extracting air from the interior of the vacuum chamber is arranged inside the rear drive box (5), an electric lateral movement unit for pulling the front sealing plate (8) toward the rear vacuum box (4) is installed at the bottom end of the bottom frame (1), and a control panel (301) electrically connected to the electric lateral movement unit and the input end of the vacuum pumping assembly (10) is installed on the outer wall of one side of the control box (3).

2. A vacuum fine-tuning control device for low-temperature testing according to claim 1, characterized in that: The sliding support member comprises two square tubes (7) fixed on the outer wall of one side of the front sealing plate (8), and square holes (101) arranged on both sides of the inside of the bottom frame (1), and one end of the square tube (7) extends to the inside of the square hole (101).

3. A vacuum fine-tuning control device for low-temperature testing according to claim 1, characterized in that: A rectangular cavity is provided inside the frame (2) above the rear vacuum box (4), and a rubber block is fixed on the outer wall of the front sealing plate (8) on one side close to the frame (2), and the rubber block and the rectangular cavity are mutually fitted.

4. A vacuum fine-tuning control device for low-temperature testing according to claim 1, characterized in that: The vacuum pumping assembly (10) comprises a vacuum pump (1001) installed at the bottom of the rear drive box (5), and a Y-shaped exhaust pipe (1003) installed at equal distances on the inner wall of one side of the rear drive box (5); a vertical pipe (1005) is installed at one end of the Y-shaped exhaust pipe (1003) away from the rear drive box (5); a switch valve (1004) is installed at the bottom end of the vertical pipe (1005); and the outlet end of the switch valve (1004) is connected to the air inlet of the vacuum pump (1001).

5. A vacuum fine-tuning control device for low-temperature testing according to claim 4, characterized in that: An exhaust check valve (1002) is installed at the air outlet of the vacuum pump (1001), and a pressure gauge (11) having one end extending into the interior of the rear vacuum box (4) is installed on the inner wall of one side of the rear drive box (5).

6. A vacuum fine-tuning control device for low-temperature testing according to claim 4, characterized in that: Exhaust pipes (6) are installed on both sides of the interior of the rear vacuum box (4), and one end of the exhaust pipe (6) passes through the outside of the rear drive box (5) and is connected to one end of the Y-shaped exhaust pipe (1003).

7. A vacuum fine-tuning control device for low-temperature testing according to claim 1, characterized in that: The electric lateral movement unit comprises a bottom plate (12) fixed to the bottom end of the bottom frame (1), and a screw linear module (13) installed on the lower surface of the bottom plate (12); a guide plate (14) is installed at the movable end of the screw linear module (13); the top end of the guide plate (14) is fixedly connected to the outer wall of one side of the front sealing plate (8); and a servo motor (15) for driving the screw linear module (13) to work is installed on one side of the bottom end of the bottom plate (12).

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