Vacuumizing device of isostatic press

Abstract

The utility model provides an isostatic pressing machine vacuumizing device which comprises an air exhaust box, a vacuum control box is arranged in the air exhaust box, evenly-distributed heat dissipation openings are formed in the outer side of the air exhaust box, a connecting pipe is arranged in the vacuum control box, and symmetrically-distributed sliding columns are arranged on the outer side of the connecting pipe in a sliding mode. Conical adjusting blocks are arranged at the ends, close to the transverse center of the connecting pipe, of the sliding columns, adjusting bases are arranged in the connecting pipe, and the conical adjusting blocks and adjusting openings correspondingly formed in the adjusting bases are installed in a matched mode. According to the vacuum pumping device of the isostatic pressing machine, when air in a container is sucked through the vacuum pump, the amount of conveyed air in unit time can be adjusted by adjusting and controlling the size of the air pumping opening on the premise that the pressure of the vacuum pump is controlled to be constant, and air pumping can be accurately and stably controlled so that the vacuum degree in the container can be conveniently controlled.

Description

TECHNICAL FIELD

[0001] The utility model belongs to material processing technical field, especially relate to a isostatic press vacuumizing device. BACKGROUND

[0002] The isostatic press is a kind of equipment using fluid medium to exert uniform pressure on workpiece, and is widely used in powder metallurgy, ceramic manufacturing, graphite processing and other fields, and the isostatic press vacuumizing device is used to perform vacuumizing operation on workpiece and its mold before or during isostatic pressing, and the main purpose of vacuumizing is to remove air and other gases in the mold and workpiece to ensure that the material can be more uniformly pressed in high-pressure liquid medium, thereby improving the forming quality and density.

[0003] The existing isostatic press vacuumizing device places the workpiece (usually powder or granular material) to be processed into a flexible mold, opens the vacuum valve to start the vacuum pump to make the vacuum pump work, and the air in the vacuum container is pumped out, the pressure in the container is gradually reduced, the target vacuum degree (usually several millibars to several tens of millibars) is set according to the process requirement, and it is ensured that the vacuum degree reaches the set value, and when the vacuum degree reaches the set value, the vacuum valve is closed to maintain the vacuum state, and in this process, the air and other gases in the mold and workpiece are effectively removed to form a low-pressure or high-vacuum environment, but the target vacuum degree needs to be strictly controlled during use, so the suction force of the vacuum pump needs to be controlled when the target vacuum degree is reached, and when the pressure of the vacuum pump is less than a certain value, the air in the container is difficult to be sucked out stably under the action of pressure, which leads to a large error in the vacuum degree in the container during processing, which may affect the processing of the material. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the utility model provides an isostatic press vacuumizing device, which can adjust the amount of air delivered per unit time by controlling the size of the air outlet under the premise of constant pressure of the vacuum pump when pumping the air in the container, and can accurately and stably control the air suction to control the vacuum degree in the container.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a vacuum pumping device for an isostatic press, including a vacuum box, a vacuum control box inside the vacuum box, and uniformly distributed heat dissipation vents on the outside of the vacuum box. A connecting pipe is installed inside the vacuum control box, and symmetrically distributed sliding columns are slidably arranged on the outside of the connecting pipe. A conical adjusting block is provided at the end of each sliding column near the transverse center of the connecting pipe. An adjusting seat is provided inside the connecting pipe, and the conical adjusting blocks are all fitted with corresponding adjusting ports on the adjusting seat. Mounting boxes are provided on both the upper and lower sides of the vacuum control box, and a fixing pipe is provided between the mounting box and the connecting pipe. An adjusting screw is rotatably installed inside each fixing pipe, and the adjusting screw is threadedly connected to adjacent sliding columns. A motor is provided at the end of the fixing pipe away from the connecting pipe, and the output shaft of the motor is fixed to the adjusting screw via a coupling.

[0006] As a further improvement of this utility model, an air extraction pipe is provided at the air extraction port on the outside of the air extraction box, and a solenoid valve is provided between the connecting pipe and the air extraction pipe; an exhaust pipe is provided at the exhaust port on the upper side of the air extraction box, and a vacuum pump is provided at the bottom end of the exhaust pipe, and the connecting pipe is connected to the vacuum pump.

[0007] As a further improvement of this utility model, a control box is provided at the bottom of the internal part of the vacuum box, and the solenoid valve, vacuum pump and motor are all electrically connected to the control box.

[0008] As a further improvement of this utility model, sealing strips are glued and fixed to the outer side of the conical adjusting block.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0010] Firstly, the control box regulates the operation of the solenoid valve and vacuum pump, causing the solenoid valve to open the suction pipe. Then, the operation of the vacuum pump generates suction, and the extracted air is discharged from the exhaust pipe, thereby removing the air from the vacuum container and gradually reducing the pressure inside the container.

[0011] Secondly, the conical adjustment blocks on both sides move synchronously closer to the corresponding adjustment ports on the adjustment seat. The area between the adjustment port and the conical adjustment block that can be used for air can be adjusted. Under the premise of constant vacuum pump pressure, the size of the air extraction port can be adjusted to regulate the amount of air delivered per unit time. This allows for precise and stable control of air extraction in order to control the vacuum level inside the container.

[0012] Third, the output shaft of the motor drives the adjusting screw connected to it to rotate, and the thread relationship between the adjusting screw and the slide column drives the slide column and the connecting pipe to slide stably.

[0013] Fourth, the sealing strip on the outside of the tapered adjusting block can effectively prevent the adjusting port from rubbing against the tapered adjusting block during actual use. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the internal cross-sectional structure of this utility model;

[0017] Figure 3 This is an enlarged structural diagram of point A in this utility model;

[0018] Figure 4 This is a schematic diagram of the planar structure of this utility model.

[0019] In the diagram: 101, vacuum box; 102, heat dissipation vent; 103, vacuum pipe; 104, solenoid valve; 105, exhaust pipe; 106, vacuum pump; 107, vacuum control box; 108, connecting pipe; 109, mounting box; 201, adjusting seat; 202, fixing pipe; 203, sliding column; 204, conical adjusting block; 205, adjusting screw; 206, motor; 301, control box. Detailed Implementation

[0020] To better understand this utility model, the following embodiments further illustrate its content, but the scope of protection of this utility model is not limited to the embodiments described below. Numerous specific details are set forth in the following description to provide a more thorough understanding of this utility model. However, it will be apparent to those skilled in the art that this utility model can be practiced without one or more of these details.

[0021] like Figure 2 , 3 As shown, the device includes a vacuum chamber 101, with evenly distributed heat dissipation vents 102 on the outer side of the vacuum chamber 101. A vacuum control box 107 is installed inside the vacuum control box 107, and a connecting pipe 108 is installed inside the vacuum control box 107. Symmetrically distributed sliding columns 203 are slidably arranged on the outer side of the connecting pipe 108. A conical adjusting block 204 is provided at one end of the sliding column 203 near the transverse center of the connecting pipe 108. An adjusting seat 201 is installed inside the connecting pipe 108, and the conical adjusting blocks 204 are all installed in conjunction with the corresponding adjusting ports on the adjusting seat 201.

[0022] like Figure 3 , 4As shown, mounting boxes 109 are provided on both the upper and lower sides of the vacuum control box 107. A fixing pipe 202 is provided between the mounting box 109 and the connecting pipe 108. An adjusting screw 205 is rotatably installed inside the fixing pipe 202. The adjusting screw 205 is threadedly connected to the adjacent sliding column 203. A motor 206 is provided at the end of the fixing pipe 202 away from the connecting pipe 108. The output shaft of the motor 206 is fixed to the adjusting screw 205 by a coupling.

[0023] like Figure 1 , 4 As shown, an air extraction pipe 103 is provided at the air extraction port on the outside of the air extraction box 101, and a solenoid valve 104 is provided between the connecting pipe 108 and the air extraction pipe 103; an exhaust pipe 105 is provided at the exhaust port on the upper side of the air extraction box 101, and a vacuum pump 106 is provided at the bottom end of the exhaust pipe 105, and the connecting pipe 108 is connected to the vacuum pump 106.

[0024] like Figure 4 As shown, a control box 301 is installed at the bottom of the vacuum box 101. The solenoid valve 104, vacuum pump 106 and motor 206 are all electrically connected to the control box 301.

[0025] During use, the control box 301 regulates the operation of the solenoid valve 104 and the vacuum pump 106, so that the solenoid valve 104 controls the opening of the air extraction pipe 103, and then the operation of the vacuum pump 106 generates suction, and the extracted air is discharged from the exhaust pipe 105, thereby extracting the air from the vacuum container and gradually reducing the pressure inside the container.

[0026] Just before the vacuum level inside the vacuum container reaches the target vacuum level, the control box 301 regulates the synchronous operation of the motor 206, causing the output shaft of the motor 206 to drive the adjustment screw 205 connected to it to rotate. Through the thread relationship between the adjustment screw 205 and the slide column 203, the slide column 203 slides with the connecting pipe 108, thereby causing the conical adjustment blocks 204 on both sides to synchronously approach the corresponding adjustment ports on the adjustment seat 201. The area between the adjustment port and the conical adjustment block 204 that can be air-transported can be adjusted. Under the premise of constant pressure of vacuum pump 106, the size of the air extraction port can be adjusted to regulate the amount of air delivered per unit time, so as to accurately and stably control the air extraction to control the vacuum level inside the container.

[0027] According to another embodiment of the present invention, such as Figure 3 As shown, sealing strips are glued and fixed to the outer surface of the conical adjusting block 204. When adjusting the air volume, the sealing strips on the outer side of the conical adjusting block 204 can effectively prevent the adjusting port from rubbing against the conical adjusting block 204 during actual use.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A vacuum pumping device for an isostatic press, comprising a vacuum chamber (101), wherein uniformly distributed heat dissipation vents (102) are provided on the outer side of the vacuum chamber (101), characterized in that: The vacuum control box (107) is provided inside the vacuum box (107). The connecting pipe (108) is provided inside the vacuum control box (107). Symmetrically distributed sliding columns (203) are slidably arranged on the outside of the connecting pipe (108). A conical adjusting block (204) is provided at one end of the sliding column (203) near the transverse center of the connecting pipe (108). An adjusting seat (201) is provided inside the connecting pipe (108). The conical adjusting blocks (204) are all installed in conjunction with the corresponding adjusting ports opened on the adjusting seat (201).

2. The vacuum pumping device for an isostatic press as described in claim 1, characterized in that: The vacuum control box (107) is provided with mounting boxes (109) on both the upper and lower sides. A fixing pipe (202) is provided between the mounting box (109) and the connecting pipe (108). An adjusting screw (205) is rotatably provided inside the fixing pipe (202). The adjusting screw (205) is threadedly connected to the adjacent sliding column (203).

3. The vacuum pumping device for an isostatic press as described in claim 2, characterized in that: Each end of the fixed tube (202) away from the connecting tube (108) is equipped with a motor (206), and the output shaft of the motor (206) is fixed to the adjusting screw (205) by a coupling.

4. The vacuum pumping device for an isostatic press as described in claim 3, characterized in that: An air extraction pipe (103) is provided at the air extraction port on the outside of the air extraction box (101), and a solenoid valve (104) is provided between the connecting pipe (108) and the air extraction pipe (103).

5. The vacuum pumping device for an isostatic press as described in claim 4, characterized in that: An exhaust pipe (105) is provided at the exhaust port on the upper side of the air extraction box (101), and a vacuum pump (106) is provided at the bottom end of the exhaust pipe (105). A connecting pipe (108) is connected to the vacuum pump (106).

6. The vacuum pumping device for an isostatic press as described in claim 5, characterized in that: The bottom of the vacuum box (101) is equipped with a control box (301), and the solenoid valve (104), vacuum pump (106) and motor (206) are all electrically connected to the control box (301).

7. The vacuum pumping device for an isostatic press as described in claim 1, characterized in that: The outer surfaces of the tapered adjusting block (204) are all glued and fixed with sealing strips.

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