Water circulation cooling device of screw air compressor

Abstract

The utility model relates to the technical field of cooling devices, and discloses a screw air compressor water circulation cooling device which comprises a tube type heat exchanger, the tube type heat exchanger comprises a main tube body, four liquid passing cavities are formed in the main tube body, sealing plates are fixedly connected to the two ends of the interior of each liquid passing cavity, a plurality of heat exchange tubes are fixedly installed between every two sealing plates, and the heat exchange tubes are fixedly connected with the main tube body. A flange at one end of the main pipe body is connected with a liquid inlet end cover, a flange at the other end of the main pipe body is connected with a liquid outlet end cover, four liquid inlet cavities are formed in the liquid inlet end cover, the lower portion of each liquid inlet cavity is communicated with a downward water inlet pipe, a first valve is installed on the liquid inlet side of each water inlet pipe, and the liquid outlet side of each water inlet pipe is connected with a first external pipe. Four liquid outlet cavities are formed in the liquid outlet end cover, the upper portion of each liquid outlet cavity is communicated with an upward water outlet pipe, a third valve is installed on the liquid outlet side of each water outlet pipe, a second external pipe is connected to the liquid inlet side of each water outlet pipe, and a fourth valve is installed on the second external pipe.

Description

Technical Field

[0001] This utility model belongs to the technical field of cooling devices, specifically a water circulation cooling device for a screw air compressor. Background Technology

[0002] A screw air compressor is a positive displacement compressor that draws in, compresses, and discharges air by changing the volume of the tooth grooves of parallel meshing male and female rotors (screws) inside the casing, ultimately outputting clean compressed air.

[0003] Existing screw compressors use water cooling to cool the oil, with the main equipment being a shell-and-tube heat exchanger. Circulating cooling water exchanges heat with the flowing high-temperature oil in the shell-and-tube heat exchanger, thereby cooling the high-temperature oil. However, the applicant found that when using existing shell-and-tube heat exchangers, the entire circulation pipeline needs to be shut down for internal descaling, which requires the screw compressor to be stopped, delaying production. To solve the above-mentioned problems, a water circulation cooling device for screw air compressors is proposed. Utility Model Content

[0004] The purpose of this utility model is to provide a water circulation cooling device for a screw air compressor in order to solve the problems mentioned above.

[0005] The technical solution adopted by this utility model is as follows: A water circulation cooling device for a screw air compressor includes a shell-and-tube heat exchanger for water cooling of a screw air compressor. The shell-and-tube heat exchanger includes a main body. A cross-shaped partition plate is fixedly installed inside the main body, dividing the interior of the main body into four liquid passage chambers. Each liquid passage chamber has a sealing plate fixedly connected to both ends. Multiple heat exchange tubes are fixedly installed between two sealing plates. A liquid inlet end cap is connected to a flange at one end of the main body, and a liquid outlet end cap is connected to a flange at the other end of the main body. A cross-shaped partition plate is fixedly connected inside the liquid inlet end cap, dividing the interior of the liquid inlet end cap into four liquid inlet chambers. The lower part of each liquid inlet chamber... Each of the four outlet end caps is connected to a downward-facing inlet pipe, which is fixedly installed on the inlet end cap. A valve is installed on the inlet side of the inlet pipe, and an external pipe is connected to the outlet side of the inlet pipe. A valve is installed on the external pipe. The inlet end of the inlet pipe is connected to a main water supply pipe. A cross-shaped partition plate is fixedly connected inside the outlet end cap, dividing the interior of the outlet end cap into four outlet chambers. Each outlet chamber is connected to an upward-facing outlet pipe at its upper part. The inlet pipe is fixedly installed on the outlet end cap, and a valve is installed on the outlet side of the outlet pipe. An external pipe is connected to the inlet side of the outlet pipe, and a valve is installed on the external pipe. The outlet end of the outlet pipe is connected to a main return pipe.

[0006] In a preferred embodiment, a sealing gasket is provided at the connection between the liquid inlet cap and the liquid outlet cap and the main body.

[0007] In a preferred embodiment, the lower part of each of the four liquid passage chambers is connected to a downward-facing liquid inlet pipe, the liquid inlet pipe is fixedly installed on the main body, a valve is installed on the liquid inlet pipe, and the liquid inlet end of the liquid inlet pipe is connected to the main liquid supply pipe.

[0008] In a preferred embodiment, each of the four liquid passage chambers is connected to a downward-facing liquid outlet pipe at its upper part. The liquid inlet pipe and the liquid outlet pipe on each liquid passage chamber are arranged diagonally. The liquid outlet pipe is fixedly installed on the main body. A valve is installed on the liquid outlet pipe. The liquid outlet end of the liquid outlet pipe is connected to the main return pipe.

[0009] In a preferred embodiment, the lower part of the main body is fixedly connected to two mounting legs.

[0010] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0011] 1. In this utility model, the entire shell and tube heat exchanger adopts a multi-chamber structure, and each filter chamber is individually cooled by liquid inlet. During later maintenance, each chamber can be cleaned and maintained one by one. When one filter chamber is being cleaned, the other filter chambers are operating normally, thereby achieving cleaning and maintenance without stopping the machine and avoiding the shutdown of the screw air compressor due to maintenance. Attached Figure Description

[0012] Figure 1 This is a simplified schematic diagram of the three-dimensional structure of this utility model;

[0013] Figure 2 This is a simplified schematic diagram of the internal structure of this utility model from the front view;

[0014] Figure 3 This is a simplified three-dimensional structural diagram of the main body in this utility model;

[0015] Figure 4 This is a simplified three-dimensional structural diagram of the liquid inlet cap in this utility model;

[0016] Figure 5 This is a simplified three-dimensional structural diagram of the liquid outlet cap in this utility model;

[0017] Figure 6 This is a simplified three-dimensional structural diagram of the sealing gasket in this utility model.

[0018] The diagram shows the following markings: 1-Shell-tube heat exchanger, 2-Main body, 3-Cross partition plate one, 4-Liquid passage chamber, 5-Sealing plate, 6-Heat exchange tube, 7-Liquid inlet end cap, 8-Liquid outlet end cap, 9-Cross partition plate two, 10-Liquid inlet chamber, 11-Water inlet pipe, 12-Valve one, 13-External pipe one, 14-Valve two, 15-Main water supply pipe, 16-Cross partition plate three, 17-Liquid outlet chamber, 18-Water outlet pipe, 19-Valve three, 20-External pipe two, 21-Valve four, 22-Main return pipe, 23-Sealing gasket, 24-Liquid inlet pipe, 25-Valve five, 26-Main water supply pipe, 27-Liquid outlet pipe, 28-Valve six, 29-Main return pipe, 30-Mounting support. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] The following will combine Figures 1-6 A detailed description is provided of a screw air compressor water circulation cooling device according to an embodiment of the present invention.

[0021] Example:

[0022] This utility model provides a water circulation cooling device for a screw air compressor, see reference. Figures 1 to 6As shown, the device includes a shell-and-tube heat exchanger 1 for water cooling of a screw air compressor. The shell-and-tube heat exchanger 1 includes a main tube body 2. A cross-shaped partition plate 3 is fixedly installed inside the main tube body 2, dividing the interior of the main tube body 2 into four liquid passage chambers 4. Each liquid passage chamber 4 has a sealing plate 5 fixedly connected to both ends. Multiple heat exchange tubes 6 are fixedly installed between two sealing plates 5. A liquid inlet end cap 7 is connected to a flange at one end of the main tube body 2, and a liquid outlet end cap 8 is connected to a flange at the other end of the main tube body 2. A cross-shaped partition plate 9 is fixedly connected inside the liquid inlet end cap 7, dividing the interior of the liquid inlet end cap 7 into four liquid inlet chambers 10. Each liquid inlet chamber 10 has a downward-facing water inlet pipe 11 connected to its lower part. The water inlet pipe 11 is fixedly installed on the liquid inlet end cap 7, and its liquid inlet end is connected to a main water supply pipe 15. A cross-shaped partition plate is fixedly connected inside the liquid outlet end cap 8. The cross-shaped partition plate 316 divides the interior of the liquid outlet cover 8 into four liquid outlet chambers 17. Each liquid outlet chamber 17 is connected to an upward-facing water outlet pipe 18. The water inlet pipe 11 is fixedly installed on the liquid outlet cover 8. The liquid outlet end of the water outlet pipe 18 is connected to the main return pipe 22. In this structure, the main water supply pipe 15 delivers pressurized cooling water to the water inlet pipe 11. The water inlet pipe 11 delivers the cooling water to the liquid inlet chamber 10 inside the liquid inlet cover 7, and then flows into the heat exchange pipe 6 in the liquid passage chamber 4. Then the cooling water flows into the liquid outlet cover 8. During the flow of cooling water, the high-temperature oil in the air compressor will enter the liquid passage chamber 4. At this time, the cooling water will exchange heat with the oil, thereby cooling the oil in the air compressor. After heat exchange, the cooling water will enter the water outlet pipe 18 and then enter the main return pipe 22 for return, thereby achieving circulating cooling.

[0023] refer to Figures 1 to 6 As shown, the lower part of each of the four liquid passage chambers 4 is connected to a downward-facing liquid inlet pipe 24. The liquid inlet pipe 24 is fixedly installed on the main body 2. The liquid inlet end of the liquid inlet pipe 24 is connected to the main supply pipe 26. The upper part of each of the four liquid passage chambers 4 is connected to a downward-facing liquid outlet pipe 27. The liquid inlet pipe 24 and the liquid outlet pipe 27 on each liquid passage chamber 4 are diagonally arranged. The liquid outlet pipe 27 is fixedly installed on the main body 2. The liquid outlet end of the liquid outlet pipe 27 is connected to the main return pipe 29. In this structure, the main supply pipe 26 introduces the high-temperature oil of the air compressor into the liquid inlet pipe 24, and then allows the high-temperature oil to enter the liquid passage chamber 4. Then, the cooled oil flows from the liquid outlet pipe 27 into the main return pipe 29, and then flows back into the air compressor.

[0024] refer to Figures 1 to 6As shown, valve 12 is installed on the inlet side of water inlet pipe 11, and external pipe 13 is connected to the outlet side of water inlet pipe 11. Valve 214 is installed on external pipe 13. Valve 319 is installed on the outlet side of water outlet pipe 18, and external pipe 20 is connected to the inlet side of water outlet pipe 18. Valve 421 is installed on external pipe 20. Valve 525 is installed on inlet pipe 24, and valve 628 is installed on outlet pipe 27. In this structure, when maintenance is required on the shell-and-tube heat exchanger 1, chemical descaling maintenance is performed on each heat exchange tube 6 in each liquid passage chamber 4. First, valve 525 on inlet pipe 24 and valve 628 on outlet pipe 27 are closed to cut off the flow of high-temperature oil in this liquid passage chamber 4. At the same time, valve 12 on inlet pipe 11 and valve 319 on outlet pipe 18 are closed to cut off the flow of cooling water. Then, personnel open the connecting pipe. Valve 14 on filter chamber 13 and valve 21 on connecting pipe 20 are used to release the cooling water from the heat exchange tubes 6 in filter chamber 4. Then, valve 14 is closed, and a descaling agent is injected into the filter chamber 3 through connecting pipe 20 until the heat exchange tubes 6 in filter chamber 3 are filled. Then, valve 21 is closed, and the descaling agent reacts with the dirt on the inner wall of the heat exchange tubes 6 to dissolve it. After dissolution, valves 14 and 21 are opened to discharge the descaling agent. Then, clean water is injected into the filter chamber 3 through connecting pipe 20 to flush the heat exchange tubes 6. After cleaning, valves 14 and 21 corresponding to this filter chamber are closed, and valves 12, 19, 25, and 28 are opened to enable the cooling operation of filter chamber 3. The above operation is repeated for another filter chamber 3 to clean the filter chambers 3 in sequence.

[0025] The entire shell and tube heat exchanger 1 adopts a multi-chamber structure, and each filter chamber 3 is individually cooled by liquid inlet. During later maintenance, each chamber can be cleaned and maintained one by one. When one filter chamber 3 is being cleaned, the other filter chambers 3 are operating normally, thus achieving cleaning and maintenance without stopping the machine and avoiding the shutdown of the screw air compressor due to maintenance, which would be detrimental to production.

[0026] refer to Figures 1 to 6 As shown, a sealing gasket 23 is provided at the connection between the liquid inlet cap 7 and the liquid outlet cap 8 and the main body 2. This structure uses the sealing gasket 23 to seal the connection between the liquid inlet cap 7 and the liquid outlet cap 8 and the main body 2, thereby isolating each cavity.

[0027] refer to Figures 1 to 6 As shown, the lower part of the main body 2 is fixedly connected to two mounting legs 30, which are used to support and fix the main body 2.

[0028] The implementation principle of a screw air compressor water circulation cooling device according to an embodiment of this application is as follows: When maintenance is required on the shell-and-tube heat exchanger 1, chemical descaling maintenance is performed on each heat exchange tube 6 in each liquid passage chamber 4. First, valve 25 on the inlet pipe 24 and valve 28 on the outlet pipe 27 of the corresponding liquid passage chamber 4 are closed to cut off the flow of high-temperature oil in this filter chamber 4. At the same time, valve 12 on the corresponding water inlet pipe 11 and valve 19 on the water outlet pipe 18 are closed to cut off the flow of cooling water. Then, personnel open valve 14 on the connecting pipe 13 and valve 21 on the connecting pipe 20 to release the cooling water in the heat exchange tube 6 of this filter chamber 4. Then, valve 14 is closed. 4. Then, inject the descaling agent into the filter chamber 3 through the connecting pipe 20 until the heat exchange tube 6 inside the filter chamber 3 is filled. Then close the valve 4 21 and wait for the descaling agent to react and dissolve the dirt on the inner wall of the heat exchange tube 6. After dissolution, open the valve 2 14 and the valve 4 21 to discharge the descaling agent. Then, pour clean water into the connecting pipe 20 to flush the heat exchange tube 6 inside the filter chamber 3. The cleaning is then complete. After cleaning, close the valve 2 14 and the valve 4 21 corresponding to this filter chamber. Then open the valve 1 12, the valve 3 19, the valve 5 25 and the valve 6 28 to achieve cooling operation of this filter chamber 3. Repeat the above operation for another filter chamber 3 to clean the filter chambers 3 in sequence.

[0029] It should be noted that: when designing the shell and tube heat exchanger 1, the heat exchange tubes 6 inside the three liquid passage chambers 4 are sufficient to meet the cooling requirements, thereby ensuring the cooling requirements of the oil when maintaining each liquid passage chamber 4.

[0030] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A water-circulating cooling device for a screw air compressor, comprising a shell-and-tube heat exchanger (1) for water cooling of the screw air compressor, characterized in that: The shell-and-tube heat exchanger (1) includes a main body (2), inside which a cross-shaped partition plate (3) is fixedly installed. The cross-shaped partition plate (3) divides the interior of the main body (2) into four liquid passage chambers (4). Each liquid passage chamber (4) has a sealing plate (5) fixedly connected to both ends. Multiple heat exchange tubes (6) are fixedly installed between the two sealing plates (5). One end flange of the main body (2) is connected to an inlet end cap (7), and the other end flange of the main body (2) is connected to an outlet end cap (8). A cross-shaped partition plate (9) is fixedly connected inside the inlet end cap (7). The cross-shaped partition plate (9) divides the interior of the inlet end cap (7) into four inlet chambers (10). The lower part of each inlet chamber (10) is connected to a downward-facing water inlet pipe (11). The water inlet pipe (11) is fixedly installed on the inlet end cap (7). A valve (12) is installed on the inlet side of the inlet pipe (11). An external pipe (13) is connected to the outlet side of the inlet pipe (11). A valve (14) is installed on the external pipe (13). A main water supply pipe (15) is connected to the inlet end of the inlet pipe (11). A cross-shaped partition plate (16) is fixedly connected inside the outlet end cap (8). The cross-shaped partition plate (16) divides the interior of the outlet end cap (8) into four outlet chambers (17). Each of the liquid outlet chambers (17) is connected to an upward-facing water outlet pipe (18) at its upper part. The water inlet pipe (11) is fixedly installed on the liquid outlet end cap (8). A valve three (19) is installed on the liquid outlet side of the water outlet pipe (18). An external pipe two (20) is connected to the liquid inlet side of the water outlet pipe (18). A valve four (21) is installed on the external pipe two (20). The liquid outlet end of the water outlet pipe (18) is connected to a main return pipe (22).

2. The screw air compressor water circulation cooling device as described in claim 1, characterized in that: A sealing gasket (23) is provided at the connection between the liquid inlet cap (7) and the liquid outlet cap (8) and the main body (2).

3. The water circulation cooling device for a screw air compressor as described in claim 1, characterized in that: The lower part of each of the four liquid passage chambers (4) is connected to a downward liquid inlet pipe (24). The liquid inlet pipe (24) is fixedly installed on the main body (2). A valve (25) is installed on the liquid inlet pipe (24). The liquid inlet end of the liquid inlet pipe (24) is connected to the main liquid supply pipe (26).

4. The water circulation cooling device for a screw air compressor as described in claim 3, characterized in that: Each of the four liquid passage chambers (4) is connected to a downward-facing liquid outlet pipe (27). The liquid inlet pipe (24) on each liquid passage chamber (4) is diagonally arranged with the liquid outlet pipe (27). The liquid outlet pipe (27) is fixedly installed on the main body (2). A valve six (28) is installed on the liquid outlet pipe (27). The liquid outlet end of the liquid outlet pipe (27) is connected to the main return pipe (29).

5. A screw air compressor water circulation cooling device as described in claim 1, characterized in that: The lower part of the main body (2) is fixedly connected to two mounting feet (30).

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