A mold vacuuming device

Abstract

The utility model relates to a kind of mould vacuumizing device, including the outer box of vacuum pump group, the horizontal vacuum tank is equipped in outer box, the upper side of vacuum tank is respectively fixedly connected with front vacuum pump and Roots pump by mounting bracket, the gas outlet of front vacuum pump is connected with the gas inlet of Roots pump by connecting pipe;The inside of vacuum tank is vertically inserted and fixed with baffle, and the cavity in the vacuum tank is separated into vacuum pressure-stabilizing chamber and compressed gas cavity by baffle;The gas inlet of front vacuum pump is connected with the vacuum pressure-stabilizing chamber in vacuum tank by pipeline, and vacuum tank is fixedly connected with compressed gas cavity respectively with compressed gas inlet pipe and compressed gas outlet pipe, the inlet of compressed gas inlet pipe is connected with the gas outlet of Roots pump.This vacuum device can store compressed air generated by vacuumizing in vacuum tank, and then stored compressed air can be used when blowing dust, which can reduce energy consumption, and using compressed air can also facilitate the decontamination of vacuum tank.

Description

Technical fields:

[0001] This utility model relates to the technical field of vacuum equipment, and more specifically to a mold vacuum device. Background technology:

[0002] With technological advancements, lightweighting of automobiles is one of the most effective means of saving energy and improving fuel economy. Replacing steel with aluminum is a significant direction in current automotive development. Die casting is one of the primary methods for forming aluminum alloy parts, and leveraging its technological advantages to improve production efficiency and reduce costs is a crucial direction for the future development of the die casting industry. The application of high-vacuum die casting technology reduces the porosity of aluminum alloy die castings, improves the internal quality of castings, and enhances the hardness and mechanical properties of the castings, thus gaining importance among die casting companies. Currently, die casting molds are vacuumed and dust removed using external vacuum units, and their structures are as follows... Figure 1 As shown, it consists of a vacuum tank 2, a pre-vacuum pump 3, a Roots pump 4, a vacuum tube 6, a compressed air outlet pipe 9, a connecting pipe 17, a main exhaust pipe 18, a branch exhaust pipe 19, and an inlet filter 20. When vacuuming, the pre-vacuum pump 3 is started first, followed by the Roots pump 4. The gas in the die-casting mold enters the vacuum tank 2 through the vacuum tube 6, and then is discharged sequentially through the pre-vacuum pump 3, the Roots pump 4, the main exhaust pipe 18, and the branch exhaust pipe 19. When blowing away chips and dust, the pre-vacuum pump 3 is not started, and the Roots pump 4 is started to draw in gas from the inlet filter 20. After compressing the air, it is input into the die-casting mold through the main exhaust pipe 18 and the compressed air outlet pipe 9 for blowing away chips and dust.

[0003] Therefore, whether it is vacuuming or dust removal, it is necessary to start the Roots pump 4. However, the compressed gas during vacuuming is directly discharged and wasted. Therefore, it is proposed to store the compressed gas during vacuuming and use it during dust removal. This requires starting the Roots pump 4, which can reduce energy consumption. Therefore, the structure of the vacuuming unit needs to be modified according to the above-mentioned functional principle. Utility model content:

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a mold vacuuming device. This device can store the compressed air generated during vacuuming in a vacuum tank, which can then be used for dust removal and chip blowing, thus reducing energy consumption. At the same time, the compressed air can also be used to facilitate the cleaning of the vacuum tank.

[0005] A mold vacuuming device includes an outer casing of a vacuum pump assembly, inside which is a horizontal vacuum tank. A pre-vacuum pump and a Roots pump are fixedly connected to the upper side of the vacuum tank via mounting brackets. The outlet of the pre-vacuum pump and the inlet of the Roots pump are connected via a connecting pipe. A vertical partition is inserted and fixed to the inner side of the vacuum tank, which separates the cavity inside the vacuum tank into a vacuum stabilizing chamber and a compressed gas chamber.

[0006] The inlet of the pre-vacuum pump is connected to the vacuum stabilizing chamber inside the vacuum tank via a pipeline. The vacuum tank is fixedly connected to a compression inlet pipe and a compression outlet pipe that are connected to the compression gas chamber. The inlet of the compression inlet pipe is connected to the outlet of the Roots pump. The end of the compression outlet pipe passes through the outer casing and is fixedly connected to a cleaning pipe connector. A vacuum pumping pipe that is connected to the vacuum stabilizing chamber is fixedly connected to the vacuum tank. The end of the vacuum pumping pipe extends out of the outer casing and is fixedly connected to a vacuum pumping connector.

[0007] The bottom of the vacuum tank has a drain port connected to the vacuum pressure stabilizing chamber, located at the end of the vacuum tank away from the compressed gas chamber. Several machine feet are fixed to the vacuum tank on the side of the drain port, and the machine feet are fixed to the outer casing. A horizontal cleaning pipe is inserted and fixed to the lower part of the partition. One end of the cleaning pipe is inserted into the compressed gas chamber, and the other end is inserted into the vacuum pressure stabilizing chamber and fitted with an arc-shaped jet seat. The jet seat is fixed to the inner wall of the lower part of the vacuum tank and abuts against the partition. An arc-shaped diversion groove is formed in the jet seat, which is connected to the cleaning pipe. Several jet ports facing the drain port and connected to the diversion groove are formed on the side wall of the jet seat away from the partition. Solenoid valves are fixedly connected to the vacuum pipe, the compressed air inlet pipe, the compressed air outlet pipe, and the cleaning pipe.

[0008] Preferably, the vacuum tank consists of a cylindrical tank body and end caps at both ends, and the volume of the vacuum stabilizing chamber inside the vacuum tank is larger than the volume of the compressed gas chamber;

[0009] The lower surface of the jet mount and the inner wall of the vacuum tank are on the same cylindrical surface.

[0010] Preferably, a manual ball valve is fixedly connected to the vacuum tube, and both the vacuum connector at the end of the vacuum tube and the cleaning connector at the end of the compressed air outlet tube are self-sealing connectors.

[0011] Preferably, an air filter is fixedly connected to the compressed air intake pipe.

[0012] Preferably, the solenoid valve on the cleaning pipe is installed inside the compressed gas chamber, and an isolation cover is fixedly fitted on the outside of the solenoid valve. The isolation cover, the partition, and the tank wall of the vacuum tank form a sealed solenoid valve mounting cavity.

[0013] The bottom of the vacuum tank is formed with a maintenance port that communicates with the mounting cavity of the solenoid valve.

[0014] Preferably, the end of the cleaning pipe located inside the jet seat is formed with an oriented oblique cut.

[0015] Preferably, the jet nozzles on the jet seat are funnel-shaped and distributed in a ring around the central axis of the vacuum tank;

[0016] An arc-shaped flow guide ring with a right-angled triangular cross-section is fixed to the upper surface of the jet seat, and the sidewall of the arc-shaped flow guide ring abuts against the partition plate.

[0017] The beneficial effects of this utility model are as follows:

[0018] This vacuum device can store the compressed air generated during vacuuming in a vacuum tank, which can then be used for dust removal, reducing energy consumption. At the same time, the compressed air can also be used to facilitate the cleaning of the vacuum tank. Attached image description:

[0019] Figure 1 This is a schematic diagram of the structure of an existing vacuum pumping unit;

[0020] Figure 2 This is a front view of the structure of this utility model;

[0021] Figure 3 for Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0022] In the diagram: 1. Outer casing; 2. Vacuum tank; 3. Backing vacuum pump; 4. Roots pump; 5. Baffle plate; 6. Vacuum tube; 7. Vacuum connector; 8. Compressed air inlet pipe; 9. Compressed air outlet pipe; 10. Cleaning pipe connector; 11. Sludge removal pipe; 12. Solenoid valve; 13. Jet mount; 14. Isolation cover; 15. Air filter; 16. Foot; 17. Connecting pipe; 18. Main exhaust pipe; 19. Branch exhaust pipe; 20. Inlet filter. Detailed implementation method:

[0023] Example: See Figure 2 , 3 As shown, a mold vacuuming device includes an outer casing 1 of a vacuum pump group, and a horizontal vacuum tank 2 is provided inside the outer casing 1. A pre-stage vacuum pump 3 and a Roots pump 4 are fixedly connected to the upper side of the vacuum tank 2 by mounting brackets. The outlet of the pre-stage vacuum pump 3 and the inlet of the Roots pump 4 are connected by a connecting pipe 17. A vertical partition 5 is inserted and fixed inside the vacuum tank 2, and the partition 5 divides the cavity inside the vacuum tank 2 into a vacuum stabilizing chamber a and a compressed gas chamber b.

[0024] The inlet of the pre-vacuum pump 3 is connected to the vacuum pressure stabilizing chamber a inside the vacuum tank 2 via a pipeline. The vacuum tank 2 is fixedly connected to a compression inlet pipe 8 and a compression outlet pipe 9, which are connected to the compression gas chamber b. The inlet of the compression inlet pipe 8 is connected to the outlet of the Roots pump 4. The end of the compression outlet pipe 9 passes through the outer casing 1 and is fixedly connected to a cleaning pipe connector 10. The vacuum tank 2 is fixedly connected to a vacuum pumping pipe 6, which is connected to the vacuum pressure stabilizing chamber a. The end of the vacuum pumping pipe 6 extends out of the outer casing 1 and is fixedly connected to a vacuum pumping connector 7.

[0025] The bottom of the vacuum tank 2 is formed with a drain port 21 that communicates with the vacuum pressure stabilizing chamber a. The drain port 21 is located at the end of the vacuum tank 2 away from the compressed gas chamber b. Several machine feet 16 are fixedly connected to the vacuum tank 2 on one side of the drain port 21. The machine feet 16 are fixedly connected to the outer casing 1. A horizontal cleaning pipe 11 is inserted and fixed to the lower part of the partition plate 5. One end of the cleaning pipe 11 is inserted into the compressed gas chamber b, and the other end is inserted into the vacuum pressure stabilizing chamber a and fixedly fitted with an arc-shaped sleeve. The jet seat 13 is fixed to the inner wall of the lower part of the vacuum tank 2 and abuts against the partition plate 5. The jet seat 13 has an arc-shaped diversion groove 131 that is connected to the cleaning pipe 11. The side wall of the jet seat 13 away from the partition plate 5 has a plurality of jet ports 132 that face the drain port 21 and are connected to the diversion groove 131. Solenoid valves 12 are fixedly connected to the vacuum pipe 6, the compressed air inlet pipe 8, the compressed air outlet pipe 9 and the cleaning pipe 11 respectively.

[0026] The vacuum tank 2 consists of a cylindrical tank body and end caps at both ends. The volume of the vacuum stabilizing chamber a inside the vacuum tank 2 is larger than the volume of the compressed gas chamber b. The main functions of the vacuum tank 2 are to stabilize the vacuum level, protect the vacuum pump, achieve gas-liquid separation, and buffer pressure, so it needs to be large. The compressed gas chamber b mainly stores compressed air, and its small volume makes it easier to compress the gas (the space volume of the mold groove inside the die-casting mold is also small, and the gas drawn into the vacuum can be easily compressed in its compressed gas chamber b).

[0027] The lower surface of the jet seat 13 and the inner wall of the vacuum tank 2 are on the same cylindrical surface.

[0028] A manual ball valve is fixedly connected to the vacuum tube 6. When not in use, the vacuum tube 6 can be closed manually by closing the manual ball valve, thus stopping the equipment. The vacuum connector 7 at the end of the vacuum tube 6 and the cleaning connector 10 at the end of the compressed air outlet tube 9 are both self-sealing connectors.

[0029] An air filter 15 is fixedly connected to the compressed air intake pipe 8, and the air filter 15 can filter the compressed air.

[0030] The solenoid valve 12 on the cleaning pipe 11 is installed in the compressed gas chamber b. An isolation cover 14 is fixedly fitted on the outside of the solenoid valve 12. The isolation cover 14, the partition 5 and the tank wall of the vacuum tank 2 form a sealed solenoid valve mounting cavity.

[0031] The bottom of the vacuum tank 2 is formed with a maintenance port 22 that communicates with the solenoid valve mounting cavity, which facilitates the inspection and replacement of the solenoid valve 12 on the cleaning pipe 11.

[0032] The end of the cleaning pipe 11 located inside the jet seat 13 is formed with an oblique cut, which makes the output of the cleaning pipe 11 tilt downwards and has a guiding function.

[0033] The jet nozzle 132 on the jet seat 13 is funnel-shaped and is distributed in a ring around the central axis of the vacuum tank 2; the airflow output from the jet nozzle 132 is in contact with the inner wall of the lower part of the vacuum tank 2.

[0034] An arc-shaped flow guide ring with a right-angled triangular cross-section is fixed to the upper surface of the jet seat 13. The sidewall of the arc-shaped flow guide ring abuts against the partition plate 5 to prevent dirt from accumulating on the upper surface of the jet seat 13.

[0035] Working principle: This structure is a mold vacuuming device, and its structure is as follows: Figure 1 As shown, the main feature is that the vacuum tank 2 is modified into two chambers. When vacuuming, the compressed gas can be stored in the compressed gas chamber b of the vacuum tank 2. When it is necessary to blow away debris and remove dust, the gas in the compressed gas chamber b is output from the compressed gas outlet pipe 9, so there is no need to turn on the Roots pump 4.

[0036] At the same time, the position of the drain port 21 on the vacuum tank 2 was adjusted, and a jet seat 13 opposite to the drain port 21 was set in the vacuum tank 2. The compressed gas in the compressed gas chamber b can enter the jet seat 13 through the cleaning pipe 11. The gas ejected from the jet seat 13 acts on the inner wall of the lower part of the vacuum tank 2, blowing the accumulated dirt to the drain port 21 and discharging it through the drain port 21.

[0037] The embodiments described above are illustrative of the present invention and are not intended to limit the present invention. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be as set forth in the claims.

Claims

1. A mold vacuuming device, comprising an outer casing (1) of a vacuum pump assembly, wherein a horizontal vacuum tank (2) is disposed inside the outer casing (1), and a pre-vacuum pump (3) and a Roots pump (4) are fixedly connected to the upper side of the vacuum tank (2) via mounting brackets, wherein the outlet of the pre-vacuum pump (3) and the inlet of the Roots pump (4) are connected via a connecting pipe (17); characterized in that: A vertical partition (5) is inserted and fixed to the inside of the vacuum tank (2). The partition (5) separates the cavity inside the vacuum tank (2) into a vacuum pressure stabilizing cavity (a) and a compressed gas cavity (b). The inlet of the pre-vacuum pump (3) is connected to the vacuum pressure stabilizing chamber (a) inside the vacuum tank (2) via a pipeline. The vacuum tank (2) is fixedly connected to a compression inlet pipe (8) and a compression outlet pipe (9) connected to the compression gas chamber (b). The inlet of the compression inlet pipe (8) is connected to the outlet of the Roots pump (4). The end of the compression outlet pipe (9) passes through the outer casing (1) and is fixedly connected to a cleaning pipe connector (10). The vacuum tank (2) is fixedly connected to a vacuum pump pipe (6) connected to the vacuum pressure stabilizing chamber (a). The end of the vacuum pump pipe (6) extends out of the outer casing (1) and is fixedly connected to a vacuum connector (7). The bottom of the vacuum tank (2) is formed with a drain port (21) that communicates with the vacuum pressure stabilizing chamber (a). The drain port (21) is located at the end of the vacuum tank (2) away from the compressed gas chamber (b). Several machine feet (16) are fixedly connected to the vacuum tank (2) on one side of the drain port (21). The machine feet (16) are fixedly connected to the outer casing (1). A horizontal cleaning pipe (11) is inserted and fixed to the lower part of the partition (5). One end of the cleaning pipe (11) is inserted into the compressed gas chamber (b), and the other end is inserted into the vacuum pressure stabilizing chamber (a) and a circular arc-shaped spray is fixedly connected to it. The air seat (13) and the jet seat (13) are fixed to the inner wall of the lower part of the vacuum tank (2) and abut against the partition (5). The jet seat (13) has an arc-shaped diversion groove (131) that is connected to the cleaning pipe (11). The side wall of the jet seat (13) away from the partition (5) has a number of jet ports (132) that face the drain port (21) and are connected to the diversion groove (131). The vacuum pipe (6), the compressed air inlet pipe (8), the compressed air outlet pipe (9) and the cleaning pipe (11) are respectively fixedly connected to a solenoid valve (12).

2. The mold vacuuming device according to claim 1, characterized in that: The vacuum tank (2) consists of a cylindrical tank body and end caps at both ends. The volume of the vacuum pressure stabilizing chamber (a) inside the vacuum tank (2) is greater than the volume of the compressed gas chamber (b). The lower surface of the jet seat (13) and the inner wall of the vacuum tank (2) are on the same cylindrical surface.

3. The mold vacuuming device according to claim 1, characterized in that: A manual ball valve is fixedly connected to the vacuum tube (6). The vacuum connector (7) at the end of the vacuum tube (6) and the cleaning connector (10) at the end of the compressed air outlet tube (9) are both self-sealing connectors.

4. The mold vacuuming device according to claim 1, characterized in that: An air filter (15) is fixedly connected to the compressed air intake pipe (8).

5. A mold vacuuming device according to claim 1, characterized in that: The solenoid valve (12) on the cleaning pipe (11) is installed in the compressed gas chamber (b). An isolation cover (14) is fixed on the outside of the solenoid valve (12). The isolation cover (14), the partition (5) and the tank wall of the vacuum tank (2) are surrounded to form a sealed solenoid valve mounting cavity. The bottom of the vacuum tank (2) is formed with a maintenance port (22) that communicates with the solenoid valve mounting cavity.

6. The mold vacuuming device according to claim 1, characterized in that: The end of the cleaning pipe (11) located inside the jet seat (13) is formed with an oriented oblique cut.

7. A mold vacuuming device according to claim 2, characterized in that: The jet nozzle (132) on the jet seat (13) is in the shape of a trumpet, and the jet nozzle (132) is distributed in a ring around the central axis of the vacuum tank (2); An arc-shaped flow guide ring with a right-angled triangle cross-section is fixed to the upper surface of the jet seat (13), and the side wall of the arc-shaped flow guide ring abuts against the partition plate (5).

Images