Water-ring vacuum pump with cold source circulating system and stable air exhaust rate

Abstract

The utility model discloses a water ring vacuum pump with a cold source circulating system and stable air exhaust rate. A water ring vacuum pump cavity is provided with an air inlet and an air outlet, and a vacuum pump body is internally provided with a liquid supplementing opening and a liquid discharging opening; the water cooling machine and the heat exchange equipment are arranged in the water ring vacuum pump, so that the temperature of working liquid of the water ring vacuum pump can be reduced, the air exhaust capacity of the water ring vacuum pump is further effectively improved, the water use cost is saved, environmental pollution caused by sewage discharge is reduced, and the effects of saving energy, reducing emission and reducing energy consumption are achieved. A filter screen is arranged at an inlet of the unit, so that particles or dust can be prevented from entering equipment to influence startup and use when a user installs a pipeline, the temperature of the working liquid of the liquid ring pump is cooled through a heat exchanger, and normal operation of the whole set of unit is ensured; the liquid level in the separator is displayed on site.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum pumps, in particular to a water ring vacuum pump with a self-contained cold source circulation system and a stable air extraction rate. Background Art

[0002] During the use of the water ring vacuum pump, if the water temperature is too high or too low, it will have an adverse effect on the efficiency of the pump and even shorten the service life of the pump. If the water temperature is too high, the water will evaporate, and the negative pressure condition will further aggravate the evaporation and evaporation of water, resulting in excessive water vapor in the pump body. When the water ring vacuum pump inhales too much water vapor, it rarely inhales from the outside, causing the vacuum system to be very low. Since the water temperature is related to the suction volume, when the working fluid temperature is high, the amount of air is reduced. As the temperature rises, the evaporation volume increases, occupying the original space, and the reduction in suction will extend the vacuum time. In addition, under vacuum conditions, the evaporation volume of the sealing liquid will also increase. As the temperature rises, the greater the percentage of exhaust volume, the more air cannot be properly extracted. In the prior art, the water ring vacuum pump has low efficiency due to the high inlet water temperature, short service life due to high working temperature and large load, and large power consumption. Therefore, the prior art needs to be further developed. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a water ring vacuum pump with a self-contained cold source circulation system and a stable air extraction rate, which solves the technical problems raised in the above-mentioned background technology.

[0004] To achieve the above purpose, the utility model is implemented through the following technical solutions: a water ring vacuum pump with a self-contained cold source circulation system and a stable air extraction rate, comprising a base and anchor bolts, a liquid ring pump, a transmission system, a motor, a gas-liquid separator, an industrial chiller and a heat exchanger, wherein the liquid ring pump, the transmission system, the motor, the gas-liquid separator, the industrial chiller and the heat exchanger are all fixedly mounted on the base and the anchor bolts, the driving end of the motor is connected to the transmission system, the transmission system is connected to the liquid ring pump, an air suction port is provided on the liquid ring pump, and the liquid ring pump and the gas-liquid separator are connected by a pipeline. An exhaust port is provided at the top of the gas-liquid separator, and a liquid replenishing port is connected to one side of the gas-liquid separator by a manual valve. The liquid ring pump and the gas-liquid separator are both connected to a drain port by a pipeline and a normally closed valve. The gas-liquid separator and the heat exchanger are connected by a pipeline and the manual valve, the heat exchanger and the liquid ring pump are connected by a pipeline and the manual valve, the industrial water chiller and the heat exchanger are connected by a pair of pipelines, one end of the industrial water chiller is connected to a water chiller liquid replenishing port by the manual valve, and the other end of the industrial water chiller is connected to a water chiller drain port by the normally closed valve.

[0005] Preferably, a check valve is provided between the air intake port and the liquid ring pump, and a pressure gauge is connected between the air intake port and the check valve via the manual valve.

[0006] Preferably, a liquid level meter is connected to the gas-liquid separator via a pair of manual valves.

[0007] Preferably, bimetallic thermometers are respectively installed on the pipelines connecting the heat exchanger, the gas-liquid separator and the liquid ring pump.

[0008] Preferably, a filter is fixedly installed at the air intake.

[0009] Preferably, a filter is provided on the pipeline connecting the gas-liquid separator and the heat exchanger, and the filter is connected to a filter drain port using the normally closed valve.

[0010] Preferably, the filter comprises a filter cylinder, a sealing cover is screwed onto the top end of the filter cylinder, a filter element limiting ring is arranged on the inner wall surface of the filter cylinder, a filter element is installed in the filter element limiting ring, a liquid inlet is connected to one side of the top end of the filter cylinder, a liquid outlet is connected to one side of the bottom end of the filter cylinder, a sewage outlet is connected to the bottom end of the filter cylinder, the liquid inlet is connected to the gas-liquid separator, the liquid outlet is connected to the heat exchanger, and the sewage outlet is connected to the sewage outlet of the filter.

[0011] Beneficial Effects

[0012] The utility model provides a water ring vacuum pump with a self-contained cold source circulation system and a stable air pumping rate, which has the following beneficial effects: the device is provided with a heat exchange structure to reduce the working fluid temperature of the water ring vacuum pump, thereby effectively improving the air pumping capacity of the water ring vacuum pump, saving water costs, and reducing environmental pollution caused by sewage discharge, thereby achieving the effects of energy saving, emission reduction and energy consumption reduction; a check valve and a manual butterfly valve are arranged at the inlet of the liquid ring vacuum pump to prevent the working fluid from flowing back due to sudden shutdown of the liquid ring vacuum pump; a filter is arranged at the inlet of the unit to facilitate users to install pipelines and avoid particles or dust from entering the equipment to affect the start-up and use; all vacuum pumps and accessories are fixed on the common base of the equipment to form a whole; the working fluid temperature of the liquid ring pump is cooled by the heat exchanger to ensure the normal operation of the whole unit; the gas-liquid separator is provided with a magnetic flap level gauge to display the liquid level in the separator on site. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of a water ring vacuum pump with a self-contained cold source circulation system and a stable air extraction rate according to the utility model.

[0014] Figure 2 This is a filter structure diagram of a water ring vacuum pump with a cold source circulation system and a stable air extraction rate as described in the utility model.

[0015] In the figure: 1. Liquid ring pump; 2. Transmission system; 3. Motor; 4. Gas-liquid separator; 5. Manual valve; 6. Normally closed valve; 7. Check valve; 8. Pressure gauge; 9. Industrial chiller; 10. Heat exchanger; 11. Bimetallic thermometer; 12. Base and anchor bolts; 13. Liquid level gauge; 14. Air intake; 15. Air exhaust; 16. Liquid replenishment port; 17. Liquid discharge port; 18. Liquid replenishment port for water cooler; 19. Liquid discharge port for water cooler; 20. Filter drain port; 21. Filter cylinder; 22. Sealing cover; 23. Filter element; 24. Filter element limiting ring; 25. Liquid inlet; 26. Liquid outlet; 27. Drain port. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the implementation regulations described are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] See also Figure 1-2 The utility model provides a technical solution for a water ring vacuum pump with a self-contained cold source circulation system and a stable air pumping rate: a water ring vacuum pump with a self-contained cold source circulation system and a stable air pumping rate, comprising a base and anchor bolts 12, a liquid ring pump 1, a transmission system 2, a motor 3, a gas-liquid separator 4, an industrial chiller 9 and a heat exchanger 10, wherein the liquid ring pump 1, the transmission system 2, the motor 3, the gas-liquid separator 4, the industrial chiller 9 and the heat exchanger 10 are all fixedly mounted on the base and the anchor bolts 12, the driving end of the motor 3 is connected to the transmission system 2, the transmission system 2 is connected to the liquid ring pump 1, an air suction port 14 is provided on the liquid ring pump 1, and a gas-liquid separator 4 is used between the liquid ring pump 1 and the gas-liquid separator 4. Pipeline connection, an exhaust port 15 is provided at the top of the gas-liquid separator 4, a manual valve 5 is used to connect a liquid replenishing port 16 on one side of the gas-liquid separator 4, the liquid ring pump 1 and the gas-liquid separator 4 are both connected to a discharge port 17 by a pipeline and a normally closed valve 6, the gas-liquid separator 4 and the heat exchanger 10 are connected by a pipeline and a manual valve 5, the heat exchanger 10 and the liquid ring pump 1 are connected by a pipeline and a manual valve 5, a pair of pipelines are used to connect the industrial water chiller 9 and the heat exchanger 10, one end of the industrial water chiller 9 is connected to a water chiller liquid replenishing port 18 by a manual valve 5, and the other end of the industrial water chiller 9 is connected to a water chiller discharge port 19 by a normally closed valve 6.

[0018] Furthermore, a check valve 7 is provided between the air intake port 14 and the liquid ring pump 1 , and a pressure gauge 8 is connected between the air intake port 14 and the check valve 7 via a manual valve 5 .

[0019] Furthermore, a liquid level meter 13 is connected to the gas-liquid separator 4 via a pair of manual valves 5 .

[0020] Furthermore, bimetallic thermometers 11 are respectively installed on the pipes connecting the heat exchanger 10 with the gas-liquid separator 4 and the liquid ring pump 1 .

[0021] Furthermore, a filter is fixedly installed at the air inlet 14 .

[0022] Furthermore, a filter is provided on the pipeline connecting the gas-liquid separator 4 and the heat exchanger 10 , and the filter is connected to a filter drain port 20 through a normally closed valve 6 .

[0023] Furthermore, the filter includes a filter cylinder 21, a sealing cover 22 is screwed on the top of the filter cylinder 21, a filter element limiting ring 24 is arranged on the inner wall surface of the filter cylinder 21, a filter element 23 is installed in the filter element limiting ring 24, a liquid inlet 25 is connected to one side of the top end of the filter cylinder 21, a liquid outlet 26 is connected to one side of the bottom end of the filter cylinder 21, a sewage outlet 27 is connected to the bottom end of the filter cylinder 21, the liquid inlet 25 is connected to the gas-liquid separator 4, the liquid outlet 26 is connected to the heat exchanger 10, and the sewage outlet 27 is connected to the sewage outlet 20 of the filter.

[0024] Embodiment: When the device is in use, the motor 3 is connected to the liquid ring pump 1 through the transmission system 2. The motor 3 drives the eccentric rotor blades in the liquid ring pump 1 to rotate. The water is thrown around by the impeller. Due to the centrifugal force, the water forms a closed circular ring with approximately equal thickness determined by the shape of the pump chamber. The inner surface of the upper part of the water ring is just tangent to the impeller hub, and the inner surface of the lower part of the water ring is just in contact with the top of the blade. In fact, the blade has a certain insertion depth in the water ring. At this time, a crescent-shaped space is formed between the impeller hub and the water ring, and this space is divided into a number of small cavities with the same number of blades by the impeller. If the upper part of the impeller is 0° as the starting point, the volume of the small cavity changes from small to large when the impeller rotates 180° before, and it is connected to the suction port on the end face. At this time, the gas is inhaled, and when the suction ends, the small cavity is isolated from the suction port; when the impeller continues to rotate, the small cavity changes from large to small, so that the gas is compressed; when the small cavity is connected to the exhaust port, the gas is discharged out of the pump.

[0025] A filter is installed at the air inlet 14 to prevent particles or dust from entering the device and affecting its operation when the user installs the pipeline.

[0026] The gas with water vapor is pumped into the gas-liquid separator 4 by the liquid ring pump 1 to achieve gas-liquid separation, and the gas is finally discharged from the exhaust port 15. The remaining gas is deposited at the bottom of the gas-liquid separator 4 and enters the heat exchanger 10 through the pipeline and the filter.

[0027] During filtration, the reflux cooling liquid enters the filter cylinder 21 from the liquid inlet 25, enters the heat exchanger 10 from the liquid outlet 26 after being filtered by the filter element 23, and the filtered cooling liquid is circulated and cooled in the industrial chiller 9 and the heat exchanger 10, and the cooled cooling liquid then flows back to the liquid ring pump 1 to prevent the working fluid temperature of the liquid ring pump from being cooled by the heat exchanger, thereby ensuring the normal operation of the whole unit, and effectively improving the suction capacity of the water ring vacuum pump, saving water costs, and reducing environmental pollution caused by sewage discharge, thereby achieving energy conservation, emission reduction and energy consumption reduction effects.

[0028] The industrial chiller 9 is provided with a water-cooling machine liquid replenishing port 18 and a water-cooling machine liquid discharging port 19 , which can replenish and discharge the water-cooling machine liquid, and can also replenish the liquid in the device through the liquid replenishing port 16 .

[0029] A check valve 7 is provided between the air intake port 14 and the liquid ring pump 1 to prevent the liquid ring vacuum pump from suddenly stopping and causing the working fluid to flow back.

[0030] A pressure gauge 8 is installed between the air intake port 14 and the liquid ring pump 1 to detect the pressure, a liquid level meter 13 is installed on the gas-liquid separator 4 to detect the liquid level in the gas-liquid separator 4, and bimetallic thermometers 11 are installed at both ends of the heat exchanger 10 to detect the return and outlet temperatures of the coolant.

[0031] It should be noted that, in this document, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any such actual relationship or order between these entities or operations.

Claims

1. A water ring vacuum pump with a self-contained cold source circulation system and a stable air extraction rate, comprising a base and anchor bolts (12), a liquid ring pump (1), a transmission system (2), a motor (3), a gas-liquid separator (4), an industrial chiller (9) and a heat exchanger (10), characterized in that: The liquid ring pump (1), the transmission system (2), the motor (3), the gas-liquid separator (4), the industrial chiller (9) and the heat exchanger (10) are all fixedly mounted on the base and the anchor bolts (12); the driving end of the motor (3) is connected to the transmission system (2); the transmission system (2) is connected to the liquid ring pump (1); an air intake port (14) is provided on the liquid ring pump (1); a pipeline is used to connect the liquid ring pump (1) and the gas-liquid separator (4); an exhaust port (15) is provided at the top of the gas-liquid separator (4); a manual valve (5) is used to connect one side of the gas-liquid separator (4) to a liquid replenishing port (16); The liquid ring pump (1) and the gas-liquid separator (4) are both connected to a drain port (17) by means of a pipeline and a normally closed valve (6); the gas-liquid separator (4) and the heat exchanger (10) are connected by means of a pipeline and the manual valve (5); the heat exchanger (10) and the liquid ring pump (1) are connected by means of a pipeline and the manual valve (5); the industrial chiller (9) and the heat exchanger (10) are connected by means of a pair of pipelines; one end of the industrial chiller (9) is connected to a water chiller refill port (18) by means of the manual valve (5); and the other end of the industrial chiller (9) is connected to a water chiller drain port (19) by means of the normally closed valve (6).

2. A water ring vacuum pump with a self-contained cold source circulation system and a stable pumping rate according to claim 1, characterized in that: A check valve (7) is provided between the air intake port (14) and the liquid ring pump (1), and a pressure gauge (8) is connected between the air intake port (14) and the check valve (7) via the manual valve (5).

3. A water ring vacuum pump with a self-contained cold source circulation system and a stable pumping rate according to claim 1, characterized in that: The gas-liquid separator (4) is connected to a liquid level meter (13) via a pair of manual valves (5).

4. A water ring vacuum pump with a self-contained cold source circulation system and a stable pumping rate according to claim 1, characterized in that: Bimetallic thermometers (11) are respectively installed on the pipelines connecting the heat exchanger (10) with the gas-liquid separator (4) and the liquid ring pump (1).

5. The water ring vacuum pump with a self-contained cold source circulation system and a stable pumping rate according to claim 1, characterized in that: A filter screen is fixedly installed at the air intake port (14).

6. The water ring vacuum pump with a self-contained cold source circulation system and a stable pumping rate according to claim 1, characterized in that: A filter is provided on the pipeline connecting the gas-liquid separator (4) and the heat exchanger (10), and the filter is connected to a filter drain port (20) via the normally closed valve (6).

7. A water ring vacuum pump with a self-contained cold source circulation system and a stable pumping rate according to claim 6, characterized in that: The filter comprises a filter cylinder (21), a sealing cover (22) is screwed onto the top end of the filter cylinder (21), a filter element limiting ring (24) is arranged on the inner wall surface of the filter cylinder (21), a filter element (23) is installed in the filter element limiting ring (24), a liquid inlet (25) is connected to one side of the top end of the filter cylinder (21), a liquid outlet (26) is connected to one side of the bottom end of the filter cylinder (21), a sewage outlet (27) is connected to the bottom end of the filter cylinder (21), the liquid inlet (25) is connected to the gas-liquid separator (4), the liquid outlet (26) is connected to the heat exchanger (10), and the sewage outlet (27) is connected to the sewage outlet (20) of the filter.

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