A nitrogen filling protection device for compressor cooler

Abstract

The utility model discloses a nitrogen filling protection device for a compressor cooler, comprising a first cooler, a first air source pipeline connected to a first water inlet pipe between the first cooler and a first water inlet valve, for introducing instrument nitrogen when the first cooler is in standby mode; a first check valve and a first nitrogen filling valve are sequentially provided on the first air source pipeline near one end of the first water inlet pipe, and the first check valve is provided at the front end of the first nitrogen filling valve, for preventing instrument nitrogen and cooling water from being mixed with each other, thereby causing damage to other instrument components of the equipment; a first drain valve and a first drain port are sequentially provided on the first water outlet pipe between the first cooler and the first water outlet valve. Residual water in the cooler is cleaned by blowing in nitrogen, so that corrosion and leakage of the gas cooler caused by unclean cooling water discharge is avoided, thereby extending its service life. At the same time, it avoids the problem that the lubricating oil of the compressor oil cooler mistakenly enters the cooling water side to cause water pollution, or the cooling water enters the lubricating oil to cause oil turbidity and failure.

Description

Technical Field

[0001] The utility model relates to the field of compressor coolers, in particular to a nitrogen filling protection device for compressor coolers. Background Art

[0002] A compressor is a fluid machine that raises low-pressure gas to high-pressure gas. It first sucks low-temperature, low-pressure refrigerant gas from the suction pipe, then drives the piston to compress it through the operation of the motor, and then discharges high-temperature, high-pressure refrigerant gas to the exhaust pipe to provide power for the refrigeration cycle. The cooler of the compressor is divided into a gas cooler and an oil cooler.

[0003] If a gas cooler is used, when the compressor is in standby mode for a long time, drainage measures need to be taken on the water side of the gas cooler. However, the existing drainage measures have the following problems: (1) The cooling water is not discharged cleanly and will remain in the gas cooler for a long time without flowing, causing the accumulation of microorganisms and accelerating the corrosion of the copper tube bundle of the gas cooler; (2) The water valve is not closed tightly, causing the gas cooler to leak, shortening the service life of the gas cooler.

[0004] If an oil cooler is used, dual oil coolers are usually selected, with one in use and one as a standby under normal circumstances. However, when the compressor is stopped for standby or the compressor is put into operation and one of the oil coolers is on standby, drainage measures must also be taken on the water side of the standby oil cooler. However, existing drainage measures have the following problems: (1) The cooling water is not discharged cleanly and will remain in the oil cooler for a long time, corroding the oil cooler tube wall and causing leakage; (2) Cooling water entering the oil side will cause the oil to become turbid and fail, resulting in a large amount of oil waste; (3) Oil entering the cooling water side will pollute the circulating water quality.

[0005] Therefore, no matter the compressor uses a gas cooler or an oil cooler, once the cooling water is not completely discharged and corrosion and leakage occur, the cooler will be unusable, affecting normal production. Utility Model Content

[0006] The utility model provides a compressor cooler nitrogen filling protection device, aiming at solving the problem that the cooling tube bundles of the compressor gas cooler and the oil cooler are easily corroded and cause leakage, thus affecting the use.

[0007] To achieve its purpose, the utility model adopts the following technical solutions:

[0008] A compressor cooler nitrogen charging protection device comprises a first cooler, wherein the first cooler is connected with a first water inlet pipe and a first water outlet pipe, the first water inlet pipe is provided with a first water inlet valve, the first water outlet pipe is provided with a first water outlet valve, the first water inlet pipe between the first cooler and the first water inlet valve is connected with a first air source pipeline, the first air source pipeline is provided with a first check valve and a first nitrogen charging valve in sequence near one end of the first water inlet pipe; the first water outlet pipe between the first cooler and the first water outlet valve is provided with a first sewage valve and a first sewage outlet in sequence.

[0009] Further, the cooler includes a second cooler connected in parallel with the first cooler and having the same structure; the second cooler is connected with a second water inlet pipe and a second water outlet pipe, the second water inlet pipe is provided with a second water inlet valve, and the second water outlet pipe is provided with a second water outlet valve; the second water inlet pipe between the second cooler and the second water inlet valve is connected with a second air source pipeline, and a second check valve (and a second nitrogen filling valve) are sequentially provided on the second air source pipeline near one end of the second water inlet pipe; the second water outlet pipe between the second cooler and the second water outlet valve is sequentially provided with a second sewage valve and a second sewage outlet.

[0010] Furthermore, the first cooler is provided with a first exhaust valve and a first oil drain valve, and the second cooler is provided with a second exhaust valve and a second oil drain valve.

[0011] Furthermore, a first switching valve and a second switching valve are provided on the pipeline between the first cooler and the second cooler.

[0012] Furthermore, the first cooler and the second cooler are connected via a connecting pipe, a first oil filling valve is provided at one end of the connecting pipe close to the first cooler, and a second oil filling valve is provided at one end of the connecting pipe close to the second cooler.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] The compressor cooler nitrogen filling protection device provided by the utility model cleans the residual water in the cooler by blowing in nitrogen, thereby preventing the corrosion and leakage of the gas cooler caused by unclean cooling water discharge when the compressor is in a long-term standby state, thereby extending the service life of the gas cooler. At the same time, it avoids the problem that when the compressor oil cooler is in standby state, the lubricating oil accidentally enters the cooling water side to cause water pollution, or the cooling water enters the lubricating oil to cause oil turbidity and failure, thereby reducing the labor intensity of maintenance personnel and ensuring normal production progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of a nitrogen filling protection device for a cooler according to Example 1;

[0016] Figure 2 This is a schematic structural diagram of a cooler nitrogen filling protection device according to Example 2;

[0017] In the figure: 1, the first cooler; 2, the first gas source pipeline; 3, the first nitrogen charging valve; 4, the first non-return valve; 5, the first water inlet valve; 6, the first water outlet valve; 7, the first sewage valve; 8, the first sewage outlet; 9, the first exhaust valve; 10, the first switching valve; 11, the first oil drain valve; 12, the first oil injection valve; 13, the second cooler; 14, the second gas source pipeline; 15, the second nitrogen charging valve; 16, the second non-return valve; 17, the second water inlet valve; 18, the second water outlet valve; 19, the second sewage valve; 20, the second sewage outlet; 21, the second exhaust valve; 22, the second oil drain valve; 23, the second oil injection valve; 24, the second switching valve; 25, the first water inlet pipe; 26, the first water outlet pipe; 27, the second water inlet pipe; 28, the second water outlet pipe; 29, the connecting pipe. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model.

[0019] Example 1

[0020] like Figure 1 As shown, the compressor cooler nitrogen charging protection device of this embodiment specifically takes the gas cooler as an example, including a first cooler 1, the first cooler 1 is connected with a first water inlet pipe 25 and a first water outlet pipe 26, the first water inlet pipe 25 is provided with a first water inlet valve 5, and the first water outlet pipe 26 is provided with a first water outlet valve 6. The first water inlet pipe 25 between the first cooler 1 and the first water inlet valve 5 is connected with a first gas source pipeline 2, which is used to pass instrument nitrogen when the first cooler 1 is in standby. The first gas source pipeline 2 is provided with a first check valve 4 and a first nitrogen charging valve 3 in sequence near one end of the first water inlet pipe 25. The first check valve 4 is arranged at the front end of the first nitrogen charging valve 3 to prevent the instrument nitrogen from being mixed with the cooling water, causing damage to other instrument components of the equipment. The first outlet pipe 26 between the first cooler 1 and the first outlet valve 6 is provided with a first drain valve 7 and a first drain port 8 in sequence, which are used to timely discharge the residual water in the first cooler 1 during purging.

[0021] When the first cooler 1 of the compressor is in normal use, close the first nitrogen filling valve 3 before starting the compressor, open the first cooling water inlet valve 5 and the first outlet valve 6, and cool normally. When the first cooler 1 is in standby mode or the compressor is stopped for standby, close the first inlet valve 5 and the first outlet valve 6, discharge the cooling water in the first cooler 1, open the first nitrogen filling valve 3 to introduce nitrogen, blow away the accumulated water in the first cooler 1, and close the first drain valve 7 and the first nitrogen filling valve 3 when the nitrogen discharged from the first drain port 8 has no free water. At this time, the first cooler 1 is filled with dry nitrogen, and the pressure is maintained for standby.

[0022] Example 2

[0023] like Figure 2 As shown, the compressor cooler nitrogen charging protection device of this embodiment specifically takes a double oil cooler as an example, including a first cooler 1 and a second cooler 13 connected in parallel and having the same structure. The structure of the first cooler 1 refers to Example 1. The second cooler 13 is connected with a second water inlet pipe 27 and a second water outlet pipe 28, and the second water inlet pipe 27 is provided with a second water inlet valve 17, and the second water outlet pipe 28 is provided with a second water outlet valve 18; the second water inlet pipe 27 between the second cooler 13 and the second water inlet valve 17 is connected with a second gas source pipeline 14, which is used to pass instrument nitrogen when the second cooler 13 is on standby. The second gas source pipeline 14 is provided with a second check valve 16 and a second nitrogen charging valve 15 in sequence near one end of the second water inlet pipe 27. The second check valve 16 is arranged at the front end of the second nitrogen charging valve 15 to prevent the instrument nitrogen from being mixed with the cooling water and causing damage to other instrument components of the equipment. A second drain valve 19 and a second drain port 20 are provided in sequence on the second water outlet pipe 28 between the second cooler 13 and the second water outlet valve 18 to timely discharge the remaining accumulated water in the second cooler 13 during purging.

[0024] The first cooler 1 is provided with a first exhaust valve 9 and a first oil drain valve 11, and the second cooler 13 is provided with a second exhaust valve 21 and a second oil drain valve 22. The first cooler 1 and the second cooler 13 are connected through a connecting pipe 29, and a first oil injection valve 12 is provided at one end of the connecting pipe 29 close to the first cooler 1, and a second oil injection valve 23 is provided at one end of the connecting pipe 29 close to the second cooler 13. A first switching valve 10 and a second switching valve 24 are provided on the pipeline between the first cooler 1 and the second cooler 13. The first switching valve 10 and the second switching valve 24 are both three-way valves, which are switched at the same time, one in and one out, for switching the working state of the first cooler 1 and the second cooler 13. Specifically, there are indicator positions on the first switching valve 10 and the second switching valve 24. When the first cooler 1 and the second cooler 13 are operated in parallel, the first switching valve 10 and the second switching valve 24 are switched to the middle position. When the first cooler 1 or the second cooler 13 is operated alone, the first switching valve 10 and the second switching valve 24 both point to the operating cooler.

[0025] When the first cooler 1 and the second cooler 13 of the compressor are in normal use, the first nitrogen filling valve 3 on the first gas source pipeline 2 and the second nitrogen filling valve 15 on the second gas source pipeline 14 are closed before the compressor is started, and the first water inlet valve 5, the first water outlet valve 6, the second water inlet valve 17 and the second water outlet valve 18 of the cooling water are opened for normal cooling. When the compressor is stopped for standby, the first water inlet valve 5, the first water outlet valve 6, the second water inlet valve 17 and the second water outlet valve 18 are closed to discharge the cooling water in the first cooler 1 and the second cooler 13. At this time, the first nitrogen filling valve 3 and the second nitrogen filling valve 15 are opened to introduce nitrogen to blow away the accumulated water in the first cooler 1 and the second cooler 13. When the nitrogen discharged from the first sewage outlet 8 and the second sewage outlet 20 has no free moisture, the first sewage valve 7 and the second sewage valve 19 are closed, and the first nitrogen filling valve 3 and the second nitrogen filling valve 15 are closed. At this time, the first cooler 1 and the second cooler 13 are filled with dry nitrogen, and the pressure is maintained for standby.

[0026] When the compressor is put into operation, close the first nitrogen filling valve 3 and the second nitrogen filling valve 15, operate the first switching valve 10 and the second switching valve 24 to the middle position, at this time, the first cooler 1 and the second cooler 13 are in parallel state, the first oil drain valve 11 of the first cooler 1 and the second oil drain valve 22 of the second cooler 13 are both closed, the first oil injection valve 12 of the first cooler 1 and the second oil injection valve 23 of the second cooler 13 are both opened, and the first cooler 1 and the second cooler 13 are injected with oil at the same time. Then operate the first switching valve 10 and the second switching valve 24, the indicator position points to the second cooler 13, select the second cooler 13 to operate, the first cooler 1 is on standby, open the second exhaust valve 21 on the oil side of the second cooler 13, drain the oil side gas, and open the second cooling water inlet valve 17 and the second outlet valve 18 of the second cooler 13. Close the first water inlet valve 5 and the first water outlet valve 6 of the first cooler 1 to drain the cooling water in the first cooler 1, then open the first nitrogen filling valve 3 on the first gas source pipeline 2 to introduce nitrogen to blow away the accumulated water in the first cooler 1, and close the first sewage valve 7 and the first nitrogen filling valve 3 when the nitrogen discharged from the first sewage outlet 8 has no free moisture. At this time, the first cooler 1 is filled with dry nitrogen, and the first cooler 1 can be kept pressurized for standby use.

[0027] When the cooler 1 has been running for a period of time or the second cooler 13 fails and needs to be switched, open the first exhaust valve 9 on the oil side of the first cooler 1 to exhaust the gas on the oil side of the first cooler 1 and confirm that the first exhaust valve 9 on the oil side of the first cooler 1 is discharging oil; open the first cooling water inlet valve 5 and the first outlet valve 6 of the first cooler 1, slightly open the first oil filling valve 12 of the first cooler 1, and slowly open the first switching valve 10 and the second switching valve 24 to the middle position under the premise of stable oil pressure, so that the first cooler 1 and the second cooler 13 run in parallel for about one hour, and then gradually fully open the first switching valve 10 and The second switching valve 24 is used to put the first cooler 1 into use and the second cooler 13 out of use. The first switching valve 10 and the second switching valve 24 indicate the first cooler 1, close the second water inlet valve 17 and the second water outlet valve 18 of the cooling water of the second cooler 13, open the second nitrogen filling valve 15 on the second air source pipeline 14 to introduce nitrogen, and discharge the accumulated water in the second cooler 13. When the nitrogen discharged from the second sewage outlet 20 has no free moisture, close the second sewage valve 19 and the second nitrogen filling valve 15. At this time, the second cooler 13 is filled with dry nitrogen, and the second cooler 1 can be kept pressurized for standby use.

[0028] It should be understood that the above-mentioned specific embodiments of the utility model described above are only used to illustrate or explain the principles of the utility model, and do not constitute a limitation of the utility model. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the utility model should be included in the protection scope of the utility model. In addition, the claims attached to the utility model are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or the equivalent forms of such scope and boundaries.

Claims

1. A compressor cooler nitrogen charging protection device, comprising a first cooler (1), the first cooler (1) being connected to a first water inlet pipe (25) and a first water outlet pipe (26), the first water inlet pipe (25) being provided with a first water inlet valve (5), the first water outlet pipe (26) being provided with a first water outlet valve (6), characterized in that: The first water inlet pipe (25) between the first cooler (1) and the first water inlet valve (5) is connected to a first gas source pipe (2), and a first check valve (4) and a first nitrogen filling valve (3) are sequentially provided on the first gas source pipe (2) at one end close to the first water inlet pipe (25); and a first sewage valve (7) and a first sewage outlet (8) are sequentially provided on the first water outlet pipe (26) between the first cooler (1) and the first water outlet valve (6).

2. A compressor cooler nitrogen filling protection device according to claim 1, characterized in that: The cooler comprises a second cooler (13) connected in parallel with the first cooler (1) and having the same structure; the second cooler (13) is connected with a second water inlet pipe (27) and a second water outlet pipe (28); the second water inlet pipe (27) is provided with a second water inlet valve (17); the second water outlet pipe (28) is provided with a second water outlet valve (18); the second water inlet pipe (27) between the second cooler (13) and the second water inlet valve (17) is connected with a second air source pipe (14); a second check valve (16) and a second nitrogen filling valve (15) are provided in sequence on the second air source pipe (14) near one end of the second water inlet pipe (27); and the second water outlet pipe (28) between the second cooler (13) and the second water outlet valve (18) is provided with a second sewage valve (19) and a second sewage outlet (20) in sequence.

3. A nitrogen filling protection device for a compressor cooler according to claim 2, characterized in that: The first cooler (1) is provided with a first exhaust valve (9) and a first oil drain valve (11), and the second cooler (13) is provided with a second exhaust valve (21) and a second oil drain valve (22).

4. A nitrogen filling protection device for a compressor cooler according to claim 3, characterized in that: A first switching valve (10) and a second switching valve (24) are provided on the pipeline between the first cooler (1) and the second cooler (13).

5. A nitrogen filling protection device for a compressor cooler according to claim 4, characterized in that: The first cooler (1) and the second cooler (13) are connected via a connecting pipe (29); a first oil injection valve (12) is provided at one end of the connecting pipe (29) close to the first cooler (1); and a second oil injection valve (23) is provided at one end of the connecting pipe (29) close to the second cooler (13).

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