CN219197637U

CN219197637U - Dry-type screw vacuum pump circulation cooling device

Info

Publication number: CN219197637U
Application number: CN202320185949.8U
Authority: CN
Inventors: 赵彬彬; 尚玉静
Original assignee: Shandong Kaine Vacuum Technology Co ltd
Current assignee: Shandong Kaine Vacuum Technology Co ltd
Priority date: 2023-02-11
Filing date: 2023-02-11
Publication date: 2023-06-16
Anticipated expiration: 2033-02-11

Abstract

The utility model discloses a circulating cooling device of a dry screw vacuum pump, and relates to the technical field of vacuum pumps; the device comprises a pump body, wherein two vertically distributed screws are arranged in the pump body through bearings, shaft parts of the two screws are connected through gear meshing, and one screw is also connected with an output shaft of a motor through a gear; the screw rod is of a hollow structure, and an opening is formed in the bottom end of the screw rod; a water receiving disc is arranged below the two screws; the two screw rods are internally provided with a first water inlet pipe, the top of the first water inlet pipe is provided with a plurality of water inlet holes distributed in a ring shape, the bottom ends of the two first water inlet pipes penetrate through the bottom of the water receiving disc and then are connected with one end of a second water inlet pipe in a converging mode, and the other end of the second water inlet pipe penetrates through the side wall of the pump body and then is connected with a water tank outside the pump body; the bottom surface of the water receiving disc is provided with a water return hole which is connected with one end of a water return pipe positioned below the water receiving disc; under the condition that the normal operation of the pump body is not affected, circulating cooling water is introduced into the screw for cooling, and the effect is remarkable.

Description

Dry-type screw vacuum pump circulation cooling device

Technical Field

The utility model relates to the technical field of vacuum pumps, in particular to a circulating cooling device of a dry screw vacuum pump.

Background

The dry screw vacuum pump is an air extracting device which uses a pair of screws to make synchronous high-speed reverse rotation in a pump shell to produce air suction and air exhaust action, and the two screws are supported by bearings through fine dynamic balance correction, and are installed in the pump shell, and between the screws a certain gap is set, so that when the pump is operated, the pumps have no friction with each other, and are stable in operation, low in noise, and the working cavity has no need of lubricating oil, so that the dry screw pump can be used for pumping out the gas occasion containing a large quantity of water vapor and a small quantity of dust, and has the advantages of higher extreme vacuum, lower power consumption, energy saving, maintenance-free and the like. The vacuum pump is a newer and more-substituted product of the traditional vacuum pump, and has great market prospect in the future.

When the existing vacuum pump is operated, a large amount of heat is generated when two screws are operated at a high speed, and the distance between the screws is changed due to expansion caused by heat and contraction caused by cold, so that the normal operation of the pump body is influenced; the existing cooling device mainly aims at the pump shell to cool in an air-cooling or water-cooling mode, the screw is difficult to accurately position in the mode, the screw rotating at a high speed is a heat source for generating heat and an object needing to be cooled in a key mode, and an air medium which is rapidly pumped away is arranged between the pump shell and the screw, so that the existing cooling effect is still to be improved.

Disclosure of Invention

In order to solve the technical problems, the utility model provides the circulating cooling device for the dry screw vacuum pump, which has obvious effect when circulating cooling water is introduced into the screw to cool the screw under the condition that the normal operation of the pump body is not influenced.

The technical scheme adopted for solving the technical problems is as follows: a dry screw vacuum pump circulation cooling device comprises a pump body, wherein two vertically distributed screws are arranged in the pump body through bearings, shaft parts of the two screws are connected through gear engagement, and one screw is also connected with an output shaft of a motor through a gear; the screw rod is of a hollow structure, and an opening is formed in the bottom end of the screw rod; a water receiving disc is arranged below the two screws; the two screw rods are internally provided with a first water inlet pipe, the top of the first water inlet pipe is provided with a plurality of water inlet holes distributed in a ring shape, the bottom ends of the two first water inlet pipes penetrate through the bottom of the water receiving disc and then are connected with one end of a second water inlet pipe in a converging mode, and the other end of the second water inlet pipe penetrates through the side wall of the pump body and then is connected with a water tank outside the pump body; the bottom surface of the water receiving disc is provided with a water return hole, the water return hole is connected with one end of a water return pipe positioned below the water receiving disc, and the other end of the water return pipe penetrates through the side wall of the pump body and is connected with a water tank outside the pump body; the water tank is internally provided with cooling water, one end of the second water inlet pipe connected with the water tank is positioned below the liquid level of the cooling water, and one end of the water return pipe connected with the water tank is positioned above the liquid level of the cooling water; and the second water inlet pipe is provided with a water pump which can provide power for water inlet.

The diameter of the first water inlet pipe is smaller than the hollow diameter of the screw rod, a gap is reserved between the outer wall of the first water inlet pipe and the inner wall of the screw rod, so that the screw rod cannot touch the first water inlet pipe when rotating, and cooling water in the first water inlet pipe can slide down to the water receiving disc along the gap after being sprayed to the inner wall of the screw rod through the water inlet hole.

The top of the water tank is provided with a tank cover, and cooling water can be replaced after the tank cover is opened.

Install the thermoscope on the water tank, the response end of thermoscope is located below the inside cooling water liquid level of water tank, and the display terminal of thermoscope is located the water tank outer wall, can acquire the temperature of current cooling water, then transmits to the display terminal and shows, can change the lower cooling water of temperature again after the staff found the temperature exceeds the prescribed value.

The water receiving disc is of a funnel-shaped structure with a wide upper part and a narrow lower part, and cooling water in the screw rod falls into the water receiving disc and then flows back to the water tank through the water return hole and the water return pipe.

The beneficial effects of the utility model are as follows: according to the dry screw vacuum pump circulation cooling device, a screw is designed into a hollow structure, cooling water in a water tank is sprayed to the inner wall of the screw through a second water inlet pipe, a first water inlet pipe and a water inlet hole in sequence, and the screw is introduced with the cooling water to cool under the condition that the normal operation of a pump body is not affected; the cooling water falls down and is converged into the water receiving disc under the action of gravity, and then flows back into the water tank through the water return hole and the water return pipe, so that cooling circulation is realized.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings that are necessary for the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the structure of the drip tray;

FIG. 3 is a schematic view of the structure of the top of the first inlet pipe;

fig. 4 is a schematic view of the structure of the inside of the screw.

The water-collecting device is characterized by comprising a pump body 1, a screw rod 2, a motor 3, a water collecting disc 4, a first water inlet pipe 5, a water inlet hole 6, a second water inlet pipe 7, a water tank 8, a water return hole 9, a water return pipe 10, a water pump 11, a box cover 12 and a thermometer.

Detailed Description

The present utility model will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Referring to fig. 1-4, the embodiment provides a circulating cooling device of a dry screw vacuum pump, which comprises a pump body 1, wherein two vertically distributed screws 2 are arranged in the pump body 1 through bearings, shaft parts of the two screws 2 are connected through gear meshing, and one screw is also connected with an output shaft of a motor 3 through a gear; in order to directly cool the screw rod, the screw rod 2 is designed into a hollow structure, and the bottom end of the screw rod 2 is provided with an opening; a water pan 4 is arranged below the two screws 2, and the water pan 4 can be welded and connected with the inner wall of the pump body 1 through a connecting rod; a first water inlet pipe 5 is arranged in the hollow structure of the two screws 2, a plurality of water inlet holes 6 which are distributed in a ring shape are arranged at the top of the first water inlet pipe 5, the bottom ends of the two first water inlet pipes 5 extend out of the openings at the lower ends of the screws 2, penetrate through the bottom of the water receiving disc 4 and then are converged, then are connected with one end of a second water inlet pipe 7, and the other end of the second water inlet pipe 7 penetrates through the side wall of the pump body 1 and is connected with a water tank 8 positioned at the outer side of the pump body 1; a water return hole 9 is formed in the lowest position of the bottom surface of the water receiving disc 4, the water return hole 9 is connected with one end of a water return pipe 10 positioned below the water receiving disc 4, and the other end of the water return pipe 10 penetrates through the side wall of the pump body 1 and is connected with a water tank 8 outside the pump body 1; the water tank 8 is internally provided with cooling water, one end of the second water inlet pipe 7 connected with the water tank 8 is positioned below the liquid level of the cooling water, and one end of the water return pipe 10 connected with the water tank 8 is positioned above the liquid level of the cooling water; the second water inlet pipe 10 is provided with a water pump 11 on the part positioned in the water tank 8, and the water pump 11 can provide power for water inlet after being started.

In order to ensure that the first water inlet pipe 5 is not touched when the screw rod 2 rotates at a high speed, the first water inlet pipe 5 is designed to be smaller than the hollow diameter of the screw rod 2, a gap is formed between the outer wall of the first water inlet pipe 5 and the inner wall of the screw rod 2, the first water inlet pipe 5 is not touched when the screw rod 2 rotates due to the fact that the gap is arranged, and cooling water in the screw rod 2 can slide down into the water receiving disc 4 along the gap.

The top end of the water tank 8 is hinged or provided with a tank cover 12 through a clamping groove, and the tank cover 12 can be opened for cooling water replacement.

In order to timely master the temperature of cooling water and judge whether water is needed to be changed, a thermometer 13 is installed on the water tank 8, the sensing end of the thermometer 13 is installed inside the water tank 8 and below the liquid level, the display end of the thermometer 13 is installed on the outer wall of the water tank 8, and a worker can acquire the temperature of the cooling water in the water tank 8 through the display end.

The water receiving tray is preferably a funnel-shaped structure with a wide upper part and a narrow lower part in order to conveniently receive the cooling water falling in the screw 2.

The working principle of the utility model is as follows: when the screw is required to be cooled, the water pump 11 is started, cooling water in the water tank 8 enters the second water inlet pipe 7, then is split into the two first water inlet pipes 5, is sprayed onto the inner walls of the two screws from the water inlet holes 6, then falls into the water receiving disc under the influence of gravity, and enters the water return pipe 10 to return to the water tank 8, so that circulation is completed.

Of course, the above description is not limited to the above examples, and the technical features of the present utility model that are not described may be implemented by or by using the prior art, which is not described herein again; the above examples and drawings are only for illustrating the technical scheme of the present utility model and not for limiting the same, and the present utility model has been described in detail with reference to the preferred embodiments, and it should be understood by those skilled in the art that changes, modifications, additions or substitutions made by those skilled in the art without departing from the spirit of the present utility model and the scope of the appended claims.

Claims

1. A dry screw vacuum pump circulation cooling device comprises a pump body (1), wherein two vertically distributed screws (2) are arranged in the pump body (1) through bearings, shaft parts of the two screws (2) are connected through gear engagement, and one screw (2) is connected with an output shaft of a motor (3) through a gear; the screw rod (2) is of a hollow structure, and an opening is formed in the bottom end of the screw rod (2); a water receiving disc (4) is arranged below the two screws (2); the two screws (2) are internally provided with a first water inlet pipe (5), the top of the first water inlet pipe (5) is provided with a plurality of water inlet holes (6) which are distributed in a ring shape, the bottom ends of the two first water inlet pipes (5) penetrate through the bottom of the water receiving disc (4) and then are connected with one end of a second water inlet pipe (7) in a converging way, and the other end of the second water inlet pipe (7) penetrates through the side wall of the pump body (1) and then is connected with a water tank (8) at the outer side of the pump body (1); the bottom surface of the water receiving disc (4) is provided with a water return hole (9), the water return hole (9) is connected with one end of a water return pipe (10) positioned below the water receiving disc (4), and the other end of the water return pipe (10) penetrates through the side wall of the pump body (1) and then is connected with a water tank outside the pump body (1); the water tank (8) is internally provided with cooling water, one end of the second water inlet pipe (7) connected with the water tank (8) is positioned below the liquid level of the cooling water, and one end of the water return pipe (10) connected with the water tank (8) is positioned above the liquid level of the cooling water; and a water pump (11) is arranged on the second water inlet pipe (7).

2. The circulating cooling apparatus of a dry screw vacuum pump according to claim 1, characterized in that the diameter of the first water inlet pipe (5) is smaller than the hollow diameter of the screw (2), and a gap is provided between the outer wall of the first water inlet pipe (5) and the inner wall of the screw (2).

3. The circulating cooling apparatus of a dry screw vacuum pump according to claim 1, characterized in that a tank cover (12) is provided at the top end of the water tank (8).

4. The circulating cooling device of the dry screw vacuum pump according to claim 1, wherein a thermometer (13) is installed on the water tank (8), an induction end of the thermometer (13) is located below the liquid level of cooling water in the water tank (8), and a display end of the thermometer (13) is located on the outer wall of the water tank (8).