Cooling water anti-freezing device of roots vacuum pump

Abstract

The utility model relates to the technical field of anti-freezing devices, and provides a cooling water anti-freezing device of a roots vacuum pump in order to overcome the defect that in the prior art, the contact position of the water surface of cooling liquid and the inner wall of a cooling box is prone to freezing, the cooling water anti-freezing device comprises a heat preservation water tank of a cylindrical structure, and a cover plate is fixedly installed at the top of the heat preservation water tank. A transmission shaft is rotatably installed at the bottom in the heat preservation water tank, the interior of the transmission shaft is of a hollow structure, the surface of the transmission shaft is slidably connected with a scraping plate in a sleeved mode, and ice breaking blocks are fixedly installed at the different ends of the two sides of the scraping plate. Meanwhile, thin ice on the water surface of the cooling water is broken through the ice breaking block, a thick ice layer is prevented from being formed, the scraper always floats on the surface of the cooling water under the buoyancy action of the cooling water, the scraper and the ice breaking block always stir the water surface of the cooling water, and the anti-freezing effect of the equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of antifreeze devices, in particular to an antifreeze device for cooling water of a Roots vacuum pump. Background Art

[0002] During the use of Roots vacuum pumps, cooling water is required for cooling. The cooling water is usually stored in a box. In the hot season, it is very convenient to extract the cooling water. However, in winter, especially when the temperature is low, the cooling water is easy to freeze and make it difficult to extract. Therefore, it is necessary to design a cooling water antifreeze device.

[0003] A Roots vacuum pump cooling water antifreeze device in the prior art (publication number: CN219344977U) generates heat by arranging a heater to heat the inside of the hollow metal stirring shaft through the through hole on the metal stirring shaft, and transfers the heat to the inside of the antifreeze water tank inner shell to achieve the insulation effect of the cooling water. However, the heat transfer effect of the device from the metal stirring shaft to the inner wall of the antifreeze water tank is not good, so that the contact between the coolant water surface and the inner wall of the cooling box is easy to freeze, and the ice layer will gradually increase. Therefore, it is urgent to design a Roots vacuum pump cooling water antifreeze device that can break the ice on the inner wall of the water tank. Utility Model Content

[0004] The utility model aims to solve the defect that the contact between the coolant water surface and the inner wall of the cooling box is easy to freeze in the prior art, and proposes a cooling water antifreeze device for a Roots vacuum pump.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A cooling water antifreeze device for a Roots vacuum pump comprises an insulated water tank, which is in a cylindrical structure. A cover plate is fixedly installed on the top of the insulated water tank. A transmission shaft is rotatably installed on the bottom of the insulated water tank. The interior of the transmission shaft is a hollow structure. A scraper is slidably sleeved on the surface of the transmission shaft. Icebreakers are fixedly installed on different ends of both sides of the scraper. Each of the icebreakers is in a bow-shaped structure. A plurality of drainage holes are provided on the surface of the scraper. The edges of the two opposite sides of the scraper are both provided with an arc structure that matches the inner wall of the insulated water tank.

[0007] As a further technical solution of the utility model, the insulated water tank is filled with cooling water, a rotating shaft is rotatably installed at the bottom of the transmission shaft, the surface of the rotating shaft is provided with spiral blades adapted to the inner diameter of the transmission shaft, and the surface of the transmission shaft is provided with multiple water inlet holes and water outlet holes, and the water outlet holes are higher than the cooling water surface.

[0008] As a further technical solution of the utility model, two slide grooves are symmetrically provided on the surface of the transmission shaft, a slot hole matching the transmission shaft is provided on the top of the scraper, and a bearing is fixedly embedded in the opening on the top of the transmission shaft.

[0009] As a further technical solution of the utility model, a second driven bevel gear is rotatably installed in the middle of the top of the cover plate, the top of the transmission shaft passes through the surface of the cover plate and is fixedly installed with the bottom rotation center of the second driven bevel gear, and a circular hole with a diameter larger than the rotating shaft is opened at the top of the second driven bevel gear.

[0010] As a further technical solution of the utility model, a servo motor and a bracket are fixedly installed on one side of the top of the cover plate, and a driving bevel gear and a first driven bevel gear are rotatably installed on the bottom of the bracket. The driving bevel gear is respectively meshed with the first driven bevel gear and the second driven bevel gear, and the output end of the servo motor is fixedly installed with the rotation center of one side of the driving bevel gear.

[0011] As a further technical solution of the utility model, the top end of the rotating shaft passes through the bearing and the second driven bevel gear in sequence, the rotating shaft is rotatably connected to the bearing, and the top end of the rotating shaft is fixedly installed with the bottom rotation center of the first driven bevel gear.

[0012] As a further technical solution of the utility model, a plurality of legs are evenly and fixedly installed on the bottom of the insulated water tank in a circular shape, a water outlet pipe is fixedly installed on the bottom of the insulated water tank, one end of the water outlet pipe is connected to the inside of the insulated water tank, and the other end is connected to a water pump, a valve is provided on the surface of the water outlet pipe, and a water inlet for adding cooling water is opened on the top of the cover plate, and a sealing plug is removably installed in the water inlet.

[0013] The beneficial effects of the utility model are:

[0014] When the equipment is in a low temperature environment, the surface of the cooling water will gradually freeze. By arranging a scraper and an icebreaker, the drive shaft is driven to rotate to drive the scraper and the icebreaker to rotate in the insulated water tank. The opposite side edges of the scraper can scrape the ice on the inner wall of the insulated water tank. At the same time, the icebreaker breaks the thin ice on the surface of the cooling water to avoid the formation of a thick ice layer. The scraper always floats on the surface of the cooling water under the buoyancy of the cooling water, so that the scraper and the icebreaker always stir the surface of the cooling water, thereby improving the antifreeze effect of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of a cooling water antifreeze device for a Roots vacuum pump proposed by the utility model;

[0016] Figure 2 A schematic diagram of the internal structure of a heat preservation water tank of a Roots vacuum pump cooling water antifreeze device proposed by the utility model;

[0017] Figure 3 for Figure 2 A schematic diagram of the enlarged structure of part A;

[0018] Figure 4 This is a cross-sectional structural diagram of a cooling water antifreeze device for a Roots vacuum pump proposed by the utility model;

[0019] Figure 5 for Figure 4 Schematic diagram of the enlarged structure of part B.

[0020] In the figure: 1. Insulated water tank; 2. Support legs; 3. Water outlet pipe; 4. Valve; 5. Sealing plug; 6. Cover plate; 7. Servo motor; 8. Bracket; 9. Active bevel gear; 10. First driven bevel gear; 11. Second driven bevel gear; 12. Spiral blade; 13. Bearing; 14. Transmission shaft; 15. Scraper; 16. Ice breaker; 17. Drain hole; 18. Water inlet hole; 19. Water outlet hole; 20. Slideway. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Please see attached Figure 1 -Attached Figure 5A cooling water antifreeze device for a Roots vacuum pump comprises an insulated water tank 1, which has a cylindrical structure. A cover plate 6 is fixedly installed on the top of the insulated water tank 1. A transmission shaft 14 is rotatably installed at the bottom of the insulated water tank 1. The interior of the transmission shaft 14 is a hollow structure. A scraper 15 is slidably sleeved on the surface of the transmission shaft 14. Icebreakers 16 are fixedly installed on different ends of both sides of the scraper 15. Each icebreaker 16 has a bow-shaped structure. A plurality of drainage holes 17 are provided on the surface of the scraper 15. The edges of the two opposite sides of the scraper 15 are provided with an arc structure that matches the inner wall of the insulated water tank 1.

[0025] During use, when the equipment is in a low temperature environment, the surface of the cooling water will gradually freeze. By setting the scraper 15 and the ice-breaking block 16, the drive shaft 14 is driven to rotate and drive the scraper 15 and the ice-breaking block 16 to rotate in the insulated water tank 1. The two opposite side edges of the scraper 15 can scrape the ice on the inner wall of the insulated water tank 1. At the same time, the ice-breaking block 16 breaks the thin ice on the surface of the cooling water to avoid the formation of a thick ice layer. In addition, the scraper 15 always floats on the surface of the cooling water under the buoyancy of the cooling water, so that the scraper 15 and the ice-breaking block 16 always stir the surface of the cooling water, thereby improving the antifreeze effect of the equipment.

[0026] The icebreaker 16 is provided with a bow-shaped structure so that the resistance can be better reduced when the icebreaker 16 rotates on the water surface. The interior of the icebreaker 16 can also be hollowed out to form a hollow structure to increase its own buoyancy, so that the scraper 15 and the icebreaker 16 are at an appropriate draft depth. The arrangement of the rows of holes 17 can make the portion of the scraper 15 below the water surface encounter less resistance when stirring the cooling water, thereby reducing the output power of the driving device and reducing the use cost of the equipment.

[0027] In this embodiment, the insulated water tank 1 is filled with cooling water, a rotating shaft is rotatably installed at the bottom of the transmission shaft 14, a spiral blade 12 adapted to the inner diameter of the transmission shaft 14 is provided on the surface of the rotating shaft, a plurality of water inlet holes 18 and water outlet holes 19 are provided on the surface of the transmission shaft 14, the water outlet holes 19 are higher than the cooling water surface, two slide grooves 20 are symmetrically provided on the surface of the transmission shaft 14, a slot hole adapted to the transmission shaft 14 is provided on the top of the scraper 15, a bearing 13 is fixedly embedded in the open top of the transmission shaft 14, a second driven bevel gear 11 is rotatably installed in the middle of the top of the cover plate 6, the top of the transmission shaft 14 passes through the surface of the cover plate 6 and is fixedly installed with the bottom rotation center of the second driven bevel gear 11, and a circular hole with a diameter larger than the rotating shaft is provided on the top of the second driven bevel gear 11.

[0028] When in use, the scraper 15 is slidably sleeved on the surface of the transmission shaft 14 through the opened slot and is limited by the slide groove 20. The spiral blade 12, the water inlet hole 18 and the water outlet hole 19 are provided. The spiral blade 12 is driven to rotate inside the transmission shaft 14 by the rotating shaft, and the cooling water at the bottom of the insulated water tank 1 is sucked into the transmission shaft 14 through the water inlet hole 18, and then the cooling water is discharged to the cooling water surface from the water outlet hole 19, so that the cooling water in the insulated water tank 1 can circulate up and down, further enhancing the antifreeze effect of the equipment on the cooling water.

[0029] In this embodiment, a servo motor 7 and a bracket 8 are fixedly installed on one side of the top of the cover plate 6, and a driving bevel gear 9 and a first driven bevel gear 10 are rotatably installed on the bottom of the bracket 8. The driving bevel gear 9 is respectively meshed with the first driven bevel gear 10 and the second driven bevel gear 11, and the output end of the servo motor 7 is fixedly installed with the rotation center of one side of the driving bevel gear 9. The top of the rotating shaft passes through the bearing 13 and the second driven bevel gear 11 in sequence, and the rotating shaft is rotatably connected to the bearing 13. The top of the rotating shaft is fixedly installed with the rotation center of the bottom of the first driven bevel gear 10, and a plurality of legs 2 are evenly fixedly installed on the bottom of the insulated water tank 1. A water outlet pipe 3 is fixedly installed on the bottom of the insulated water tank 1, one end of the water outlet pipe 3 is connected to the inside of the insulated water tank 1, and the other end is connected to the water pump. A valve 4 is provided on the surface of the water outlet pipe 3, and a water inlet for filling cooling water is opened on the top of the cover plate 6, and a sealing plug 5 is removably installed in the water inlet.

[0030] When in use, the servo motor 7 drives the active bevel gear 9 to rotate, and the active bevel gear 9 simultaneously drives the first driven bevel gear 10 and the second driven bevel gear 11 to rotate, the first driven bevel gear drives the rotating shaft to rotate, thereby driving the spiral blade 12, and the second driven bevel gear 11 drives the transmission shaft 14 to rotate, thereby driving the scraper 15 and the icebreaker 16. Pay attention to setting the rotation direction so that the "bow" of the icebreaker 16 rotates facing the cooling water, thereby improving the linkage consistency of the equipment.

[0031] From the above description, it can be seen that the above-mentioned embodiment of the present invention achieves the following technical effects: when in use, the servo motor 7 is started to drive the active bevel gear 9 to rotate, and the active bevel gear 9 drives the first driven bevel gear 10 and the second driven bevel gear 11 to rotate, and the first driven bevel gear 10 drives the spiral blade 12 to rotate through the rotating shaft, and the cooling water at the bottom of the insulated water tank 1 is pumped to the cooling water surface, thereby increasing the circulation of the cooling water and avoiding ice on the water surface. The second driven bevel gear 11 drives the scraper 15 to rotate on the cooling water surface through the transmission shaft 14, and the thin ice on the inner wall of the insulated water tank 1 can be scraped off while stirring the water surface. The scraper 15 drives the ice-breaking block 16 to rotate on the water surface, thereby increasing the stirring effect of the water surface. If the water surface is frozen, it can also have the effect of breaking ice, further avoiding ice on the water surface and improving the antifreeze effect of the equipment on the cooling water.

[0032] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A cooling water antifreeze device for a Roots vacuum pump, comprising a heat preservation water tank (1), characterized in that: The insulated water tank (1) is of cylindrical structure. A cover plate (6) is fixedly installed on the top of the insulated water tank (1). A transmission shaft (14) is rotatably installed on the bottom of the insulated water tank (1). The interior of the transmission shaft (14) is of hollow structure. A scraper (15) is slidably sleeved on the surface of the transmission shaft (14). Icebreakers (16) are fixedly installed on different ends of both sides of the scraper (15). Each of the icebreakers (16) is of a bow-shaped structure. A plurality of drainage holes (17) are provided on the surface of the scraper (15). The edges of the two opposite sides of the scraper (15) are provided with an arc surface structure that matches the inner wall of the insulated water tank (1).

2. A Roots vacuum pump cooling water antifreeze device according to claim 1, characterized in that: The heat-insulating water tank (1) is filled with cooling water, a rotating shaft is rotatably mounted on the bottom of the transmission shaft (14), a spiral blade (12) matching the inner diameter of the transmission shaft (14) is provided on the surface of the rotating shaft, and a plurality of water inlet holes (18) and water outlet holes (19) are provided on the surface of the transmission shaft (14), and the water outlet holes (19) are higher than the cooling water surface.

3. A Roots vacuum pump cooling water antifreeze device according to claim 2, characterized in that: The surface of the transmission shaft (14) is symmetrically provided with two slide grooves (20), the top of the scraper (15) is provided with a slot hole matched with the transmission shaft (14), and a bearing (13) is fixedly embedded in the top opening of the transmission shaft (14).

4. A Roots vacuum pump cooling water antifreeze device according to claim 1, characterized in that: A second driven bevel gear (11) is rotatably mounted in the middle of the top of the cover plate (6); the top end of the transmission shaft (14) passes through the surface of the cover plate (6) and is fixedly mounted to the bottom rotation center of the second driven bevel gear (11); and a circular hole having a diameter greater than that of the rotating shaft is opened at the top of the second driven bevel gear (11).

5. A Roots vacuum pump cooling water antifreeze device according to claim 4, characterized in that: A servo motor (7) and a bracket (8) are fixedly mounted on one side of the top of the cover plate (6); a driving bevel gear (9) and a first driven bevel gear (10) are rotatably mounted on the bottom of the bracket (8); the driving bevel gear (9) is meshed with the first driven bevel gear (10) and the second driven bevel gear (11) respectively; and an output end of the servo motor (7) is fixedly mounted on a rotation center of one side of the driving bevel gear (9).

6. A Roots vacuum pump cooling water antifreeze device according to claim 2, characterized in that: The top end of the rotating shaft passes through the bearing (13) and the second driven bevel gear (11) in sequence, the rotating shaft is rotationally connected to the bearing (13), and the top end of the rotating shaft is fixedly mounted to the bottom rotation center of the first driven bevel gear (10).

7. The cooling water antifreeze device for a Roots vacuum pump according to claim 1, characterized in that: The bottom of the thermal insulation water tank (1) is evenly and fixedly provided with a plurality of legs (2) in a circular shape. The bottom of the thermal insulation water tank (1) is fixedly provided with a water outlet pipe (3). One end of the water outlet pipe (3) is connected to the inside of the thermal insulation water tank (1), and the other end is connected to a water pump. A valve (4) is provided on the surface of the water outlet pipe (3). The top of the cover plate (6) is provided with a water inlet for adding cooling water. A sealing plug (5) is detachably installed in the water inlet.

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