An auxiliary cooling type anti-liquid accumulation water ring Roots vacuum unit

Abstract

The present invention relates to the technical field of vacuum units, and in particular to an auxiliary cooling type anti-liquid accumulation water ring Roots vacuum unit. It comprises a mounting seat; a top plate is provided above the mounting seat; a water ring pump mechanism and a gas-liquid separation mechanism are provided on the top of the mounting seat; a Roots pump mechanism is provided on the top of the top plate. The present invention controls the water ring pump mechanism to perform suction, and the extracted gas is separated from the working fluid by the gas-liquid separation mechanism and then input into the Roots pump mechanism, and the Roots pump mechanism continues to compress and discharge the gas and refrigerate it, and then the cold air is passed into the water ring pump mechanism to continuously cool the working fluid, and then the sucked gas is cooled by the working fluid, so that the cooling system can directly take away heat from the inside of the water ring pump mechanism and the Roots pump mechanism, which not only improves the cooling effect of the vacuum unit, but also avoids the need to shut down the water ring pump mechanism or the Roots pump mechanism for heat dissipation when it is overheated, thereby improving the working efficiency of the vacuum unit.

Description

Technical Field

[0001] The invention belongs to the technical field of vacuum units, and in particular relates to an auxiliary cooling type anti-liquid accumulation water ring Roots vacuum unit. Background Art

[0002] The Roots water ring vacuum unit is composed of a Roots pump as the main pump and a water ring pump as the backing pump in series. Since the Roots pump does not compress the pumped gas during operation, the compression is usually low. Therefore, high and medium Roots dry vacuum pumps need to be equipped with a backing pump to assist their pumping work.

[0003] After searching, in the prior art, the Chinese patent announcement number: CN220687586U, announcement date: 2024.03.29, discloses a Roots water ring vacuum unit, which relates to the technical field of vacuum pump equipment, including a base, a gas-liquid separator is fixedly installed on one side of the upper end of the base, a mounting frame is fixedly installed on the base located on one side of the gas-liquid separator, a Roots pump is fixedly installed in the mounting frame, and a water ring pump is also fixedly installed in the mounting frame located above the Roots pump. In this utility model, the first connecting pipe and the second connecting pipe are connected through a protective mechanism and a first connecting flange, and an embedded ring is arranged on the first connecting flange and inserted into the embedded groove in the second connecting flange to improve the connection sealing of the first connecting pipe and the second connecting pipe and slow down the aging of the sealing ring, and the first protective cover and the second protective cover installed on the outside of the first connecting flange and the second connecting flange can cooperate with the whistle pipe to guide the leaked gas to be ejected, and the fence and air hole in the whistle pipe are used to generate a whistle sound by airflow to remind the operator.

[0004] However, the vacuum unit still has the following defects:

[0005] In the existing Roots water ring vacuum unit, the cooling systems of the Roots pump and the water ring pump are usually cooled from the outside and are set separately. Once the cooling system of the Roots pump or the water ring pump fails, the vacuum unit needs to be shut down for cooling, thereby reducing the working efficiency of the vacuum unit. Summary of the invention

[0006] In view of the above problems, the present invention provides an auxiliary cooling type anti-liquid accumulation water ring Roots vacuum unit, comprising a mounting seat; a top plate is provided above the mounting seat; a water ring pump mechanism and a gas-liquid separation mechanism are provided on the top of the mounting seat; a Roots pump mechanism is provided on the top of the top plate;

[0007] The Roots pump mechanism comprises a Roots pump body; a piston compressor is arranged on one side wall of the Roots pump body; a pressure reducing component is connected to the air inlet end of the piston compressor;

[0008] The pressure reduction component is connected to the air outlet end of the Roots pump body; the output end of the piston compressor is connected to a vortex tube; the cold air port of the vortex tube is connected to the water ring pump mechanism;

[0009] The Roots pump body and the piston compressor are controlled to work simultaneously. The piston compressor inputs high-pressure gas into the vortex tube while reducing the air pressure at the outlet end of the Roots pump body. Then the cold air generated by the vortex tube is re-introduced into the water ring pump mechanism for auxiliary cooling.

[0010] Furthermore, the input end of the gas-liquid separation mechanism is connected to the output end of the water ring pump mechanism; a circulating pump is provided on the top of the mounting seat; the two ends of the circulating pump are respectively connected to the water ring pump mechanism and the gas-liquid separation mechanism; the input end of the Roots pump mechanism is connected to the output end of the gas-liquid separation mechanism; several groups of support columns are provided at the top edge of the mounting seat; the tops of the several groups of support columns are connected to the bottom edge of the top plate.

[0011] Furthermore, a receiving groove is provided at the bottom of the mounting seat; a support plate is slidably connected in the receiving groove along the vertical direction; a plurality of groups of first hydraulic push rods are provided at the bottom edge of the support plate; a group of support blocks are transmission-connected to the output end of each group of the first hydraulic push rods; a group of universal wheels are provided on one side wall of each group of the support blocks; a second hydraulic push rod is provided on the top inner wall of the receiving groove; and the output end of the second hydraulic push rod is transmission-connected to the support plate.

[0012] Furthermore, the water ring pump mechanism includes a water ring pump body; a cover body is provided on one side wall of the water ring pump body; a first air inlet pipe and a first air outlet pipe are provided on a side wall of the cover body away from the water ring pump body; a first compression chamber is provided in the water ring pump body; a cooling groove is spirally opened on the inner wall of the first compression chamber.

[0013] Furthermore, an annular heat conduction plate is sleeved on the inner wall of the first compression chamber; a water ring impeller is eccentrically installed in the first compression chamber; a circular plate is provided on the side of the water ring impeller close to the cover body; an air inlet groove is opened on the circular plate; the air inlet groove is connected to the first air inlet pipe; a plurality of groups of air outlet grooves are opened on the circular plate; and the plurality of groups of air outlet grooves are connected to the first air outlet pipe.

[0014] Furthermore, the gas-liquid separation mechanism includes a tank body; a gas-liquid separation chamber is provided in the tank body; a gas filter and a liquid filter are provided in the gas-liquid separation chamber from top to bottom; a second air inlet pipe is provided on the top of the tank body; the top end of the second air inlet pipe extends to the outside of the tank body and is connected to the first air outlet pipe; the top end of the second air inlet pipe extends to the inside of the gas-liquid separation chamber and is connected to the bottom of the gas filter.

[0015] Furthermore, a second air outlet pipe is provided in the gas-liquid separation chamber; the second air outlet pipe is U-shaped; one end of the second air outlet pipe is connected to the top of the gas filter, and the other end extends to the outside of the tank body; a three-way ball valve is provided on one side wall of the tank body; the two ports of the three-way ball valve are respectively connected to the top and bottom of the liquid filter; the third port of the three-way ball valve is connected to the circulation pump.

[0016] Furthermore, a second compression chamber is provided in the Roots pump body; a power chamber is provided on the side of the second compression chamber away from the piston compressor; two sets of rotating shafts are provided in the second compression chamber; a set of Roots impellers is sleeved on the outer wall of each set of rotating shafts.

[0017] Furthermore, one end of each group of the rotating shafts extends into the power chamber and is transmission-connected to a group of transmission gears; the two groups of transmission gears are meshingly connected; one end of the rotating shaft located at the bottom extends into the piston compressor and is transmission-connected to the piston compressor.

[0018] Furthermore, the pressure-reducing assembly includes a pressure-reducing pipe; one end of the pressure-reducing pipe is connected to the air outlet end of the Roots pump body, and the other end is connected to the air inlet end of the piston compressor; a plurality of groups of air inlet holes are arranged in a circular array on the outer wall of the pressure-reducing pipe; a dust-proof filter is arranged inside the pressure-reducing pipe; the dust-proof filter is located on the side of the plurality of groups of air inlet holes away from the Roots pump body.

[0019] The beneficial effects of the present invention are:

[0020] 1. The water ring pump mechanism is controlled to perform suction. The extracted gas is separated from the working fluid by the gas-liquid separation mechanism and then input into the Roots pump mechanism. The Roots pump mechanism continues to compress and discharge the gas and refrigerate it. Then the cold air is passed into the water ring pump mechanism to continuously cool the working fluid. Then the suctioned gas is cooled by the working fluid, so that the cooling system can directly take away the heat from the inside of the water ring pump mechanism and the Roots pump mechanism. This not only improves the cooling effect of the vacuum unit, but also avoids the need to shut down the water ring pump mechanism or the Roots pump mechanism for heat dissipation when it is overheated, thereby improving the working efficiency of the vacuum unit.

[0021] 2. By controlling the Roots pump body and the piston compressor to work simultaneously, the Roots pump body continues to compress and discharge the gas discharged by the water ring pump mechanism. At this time, the piston compressor draws gas through the pressure reducing pipe to reduce the gas pressure at the gas outlet end of the Roots pump body. At the same time, the characteristics of the vortex tube are used to improve the gas cooling effect of the output high-pressure gas, which not only improves the working efficiency and reliability of the Roots pump body, but also improves the gas cooling effect of the vortex tube.

[0022] 3. By passing the exhaust gas of the water ring pump mechanism into the gas-liquid separation chamber, the exhaust gas after gas-liquid separation will be filtered through the gas filter and then discharged from the second outlet pipe. When the working fluid is circulated, the working fluid of the water ring pump mechanism can be pumped out and discharged to the top of the liquid filter through the circulating pump, and then filtered through the liquid filter and re-transported to the water ring pump mechanism for use. This not only avoids impurities from entering the Roots pump mechanism through the gas, but also avoids impurities from mixing in the working fluid and entering the water ring pump mechanism, thereby reducing the wear of the water ring pump mechanism and the Roots pump mechanism caused by impurities and improving the service life of the vacuum unit.

[0023] 4. By controlling several groups of universal wheels to transfer to the bottom of several groups of support blocks, and then controlling the second hydraulic push rod to drive the support plate to descend, so that several groups of universal wheels are in contact with the ground and the vacuum unit is lifted, the vacuum unit can be moved. After moving to a suitable position, several groups of universal wheels can be controlled to reset, and then several groups of support blocks can be controlled to contact the ground and several groups of support blocks can be adjusted separately, so that the vacuum unit can maintain a horizontal state on an uneven ground, thereby improving the convenience and effect of the use of the vacuum unit.

[0024] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It shows a schematic structural diagram of a vacuum unit according to an embodiment of the present invention;

[0027] Figure 2 A cross-sectional schematic diagram of a vacuum unit according to an embodiment of the present invention is shown;

[0028] Figure 3 It shows a schematic structural diagram of a water ring pump mechanism according to an embodiment of the present invention;

[0029] Figure 4 An exploded schematic diagram of a water ring pump mechanism according to an embodiment of the present invention is shown;

[0030] Figure 5A schematic structural diagram of a gas-liquid separation mechanism according to an embodiment of the present invention is shown;

[0031] Figure 6 A cross-sectional schematic diagram of a gas-liquid separation mechanism according to an embodiment of the present invention is shown;

[0032] Figure 7 A schematic structural diagram of a Roots pump mechanism according to an embodiment of the present invention is shown;

[0033] Figure 8 A left sectional schematic diagram of a Roots pump mechanism according to an embodiment of the present invention is shown;

[0034] Fig. 9 A cross-sectional schematic diagram of a pressure reducing assembly according to an embodiment of the present invention is shown.

[0035] In the figure: 1, mounting base; 2, support column; 3, top plate; 4, water ring pump mechanism; 5, first motor; 6, circulation pump; 7, gas-liquid separation mechanism; 8, Roots pump mechanism; 9, second motor; 10, storage tank; 11, support plate; 12, first hydraulic push rod; 13, support block; 14, universal wheel; 15, second hydraulic push rod; 401, water ring pump body; 402, cover body; 403, first air inlet pipe; 404, first air outlet pipe; 405, first compression chamber; 406, cooling tank; 407, annular heat conduction plate; 408, water ring impeller; 409, round Plate; 410, air inlet groove; 411, air outlet groove; 701, tank body; 702, second air inlet pipe; 703, second air outlet pipe; 704, three-way ball valve; 705, gas-liquid separation chamber; 706, gas filter; 707, liquid filter; 801, Roots pump body; 802, piston compressor; 803, vortex tube; 804, pressure reduction component; 805, second compression chamber; 806, power chamber; 807, rotating shaft; 808, Roots impeller; 809, transmission gear; 8041, pressure reduction pipe; 8042, air inlet hole; 8043, dust filter. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] The embodiment of the present invention provides an auxiliary cooling type anti-liquid accumulation water ring Roots vacuum unit, including a mounting seat 1. For example, Figure 1 and Figure 2As shown, a plurality of groups of support columns 2 are provided at the top edge of the mounting seat 1; a top plate 3 is provided on the top of the plurality of groups of support columns 2; a water ring pump mechanism 4 is provided on the top of the mounting seat 1; a first motor 5 is provided on the top of the mounting seat 1; the output end of the first motor 5 is transmission-connected with the water ring pump mechanism 4; a gas-liquid separation mechanism 7 is provided on the top of the mounting seat 1; the input end of the gas-liquid separation mechanism 7 is connected with the output end of the water ring pump mechanism 4; a circulating pump 6 is provided on the top of the mounting seat 1; the two ends of the circulating pump 6 are respectively connected with the water ring pump mechanism 4 and the gas-liquid separation mechanism 7; a Roots pump mechanism 8 is provided on the top of the top plate 3; the input end of the Roots pump mechanism 8 is connected with the gas-liquid The output end of the separation mechanism 7 is connected; a second motor 9 is provided on the top of the top plate 3; the output end of the second motor 9 is transmission-connected to the Roots pump mechanism 8; a receiving groove 10 is provided at the bottom of the mounting seat 1; a support plate 11 is slidably connected in the vertical direction in the receiving groove 10; a plurality of groups of first hydraulic push rods 12 are provided at the bottom edge of the support plate 11; a group of support blocks 13 are transmission-connected to the output end of each group of the first hydraulic push rods 12; a group of universal wheels 14 are provided on one side wall of each group of the support blocks 13; a second hydraulic push rod 15 is provided on the top inner wall of the receiving groove 10; the output end of the second hydraulic push rod 15 is transmission-connected to the support plate 11.

[0038] Before the vacuum unit is used, several groups of universal wheels 14 can be controlled to move to the bottom of several groups of support blocks 13, and then the second hydraulic push rod 15 can be controlled to drive the support plate 11 to descend, so that several groups of universal wheels 14 are in contact with the ground and the vacuum unit is lifted, and then the vacuum unit can be moved. After moving to a suitable position, several groups of universal wheels 14 can be controlled to reset, and then several groups of support blocks 13 can be controlled to be in contact with the ground and several groups of support blocks 13 can be adjusted separately, so that the vacuum unit can maintain a horizontal state on an uneven ground, thereby improving the convenience and effect of the use of the vacuum unit. When the vacuum unit is working, the water ring pump mechanism 4 is connected to the space to be vacuumed, and then the water ring pump mechanism 4 is controlled to perform suction. The extracted gas is separated from the working fluid by the gas-liquid separation mechanism 7 and then input into the Roots pump mechanism 8. The Roots pump mechanism 8 continues to compress and discharge the gas and refrigerate it, and then the cold air is passed into the water ring pump mechanism 4 to continuously cool the working fluid, and then the sucked gas is cooled by the working fluid, so that the cooling system can directly take away heat from the inside of the water ring pump mechanism 4 and the Roots pump mechanism 8, which not only improves the cooling effect of the vacuum unit, but also avoids the need to shut down the water ring pump mechanism 4 or the Roots pump mechanism 8 for heat dissipation when it is overheated, thereby improving the working efficiency of the vacuum unit.

[0039] For example, Figure 3 and Figure 4As shown, the water ring pump mechanism 4 includes a water ring pump body 401; a cover body 402 is provided on a side wall of the water ring pump body 401 away from the first motor 5; a first air inlet pipe 403 and a first air outlet pipe 404 are provided on a side wall of the cover body 402 away from the water ring pump body 401; a first compression chamber 405 is provided in the water ring pump body 401; a cooling groove 406 is spirally opened on the inner wall of the first compression chamber 405; An annular heat conduction plate 407 is sleeved on the inner wall; a water ring impeller 408 is eccentrically installed in the first compression chamber 405; a circular plate 409 is provided on the side of the water ring impeller 408 close to the cover body 402; an air inlet groove 410 is opened on the circular plate 409; the air inlet groove 410 is connected to the first air inlet pipe 403; a plurality of groups of air outlet grooves 411 are opened on the circular plate 409; the plurality of groups of air outlet grooves 411 are connected to the first air outlet pipe 404.

[0040] When the vacuum unit is working, working fluid is injected into the annular heat conducting plate 407, and the first motor 5 drives the eccentrically arranged water ring impeller 408 to rotate. When the water ring impeller 408 rotates, due to the action of centrifugal force, the working fluid is thrown to the inner wall of the pump body to form a liquid ring, and a crescent-shaped space is formed between the liquid ring and the impeller hub. This space is divided into a number of small cavities by the impeller. As the water ring impeller 408 rotates, the volume of the small cavity will change, thereby realizing the process of air intake from the first air inlet pipe 403 and exhaust from the first air outlet pipe 404. When the liquid ring rotates, it fits on the inner wall of the annular heat conducting plate 407. At the same time, the cold air generated by the Roots pump mechanism 8 is introduced from one end of the spiral cooling groove 406 and discharged from the other end, so that the cold air can efficiently cool the working fluid through the annular heat conducting plate 407, and then the suction gas is cooled by the working fluid, so that the suction gas can directly take away heat from the inside of the water ring pump mechanism 4 and the Roots pump mechanism 8, thereby improving the cooling effect of the cooling system.

[0041] For example, Figure 5 and Figure 6As shown, the gas-liquid separation mechanism 7 includes a tank body 701; a gas-liquid separation chamber 705 is provided in the tank body 701; a gas filter 706 and a liquid filter 707 are provided in the gas-liquid separation chamber 705 from top to bottom; a second air inlet pipe 702 is provided on the top of the tank body 701; the top end of the second air inlet pipe 702 extends to the outside of the tank body 701 and is connected to the first air outlet pipe 404; the top end of the second air inlet pipe 702 extends to the inside of the gas-liquid separation chamber 705 and is connected to the gas outlet pipe 404. The tank body 701 is provided with a three-way ball valve 704 on one side wall thereof; the two ports of the three-way ball valve 704 are respectively connected with the upper and lower parts of the liquid filter 707; the third port of the three-way ball valve 704 is connected with the circulation pump 6.

[0042] When the vacuum unit is working, the exhaust gas of the water ring pump mechanism 4 is sprayed into the gas-liquid separation chamber 705 through the second air inlet pipe 702, and then keeps rotating. The liquid working fluid will drip through the liquid filter screen 707 and accumulate at the bottom of the gas-liquid separation chamber 705 after being filtered, while the exhaust gas will be filtered through the gas filter screen 706 and discharged from the port of the second air outlet pipe 703 located in the gas-liquid separation chamber 705. When the working fluid is circulated, the working fluid of the water ring pump mechanism 4 can be extracted and discharged to the top of the liquid filter screen 707 through the circulation pump 6, and then filtered through the liquid filter screen 707 and transported back to the water ring pump mechanism 4 for use, which not only avoids impurities from entering the Roots pump mechanism 8 through the gas, but also avoids impurities from mixing in the working fluid and entering the water ring pump mechanism 4, thereby reducing the wear of the water ring pump mechanism 4 and the Roots pump mechanism 8 caused by impurities and improving the service life of the vacuum unit.

[0043] For example, Figure 7 and Figure 8As shown, the Roots pump mechanism 8 includes a Roots pump body 801; a piston compressor 802 is provided on a side wall of the Roots pump body 801 away from the second motor 9; a pressure reducing component 804 is connected to the air inlet end of the piston compressor 802; the pressure reducing component 804 is connected to the air outlet end of the Roots pump body 801; a vortex tube 803 is connected to the output end of the piston compressor 802; the cold air port of the vortex tube 803 is connected to one end of the cooling groove 406; a second compression chamber 805 is provided in the Roots pump body 801; the second compression chamber 805 is away from the piston compressor 802; A power chamber 806 is provided on one side of the compressor 802; two sets of rotating shafts 807 are provided in the second compression chamber 805; a set of Roots impellers 808 are sleeved on the outer wall of each set of the rotating shafts 807; one end of each set of the rotating shafts 807 extends into the power chamber 806, and is transmission-connected to a set of transmission gears 809; the two sets of transmission gears 809 are meshingly connected; the output end of the second motor 9 is transmission-connected to the rotating shaft 807 located below; one end of the rotating shaft 807 located below extends into the piston compressor 802, and is transmission-connected to the piston compressor 802.

[0044] For example, Fig. 9 As shown, the pressure reducing assembly 804 includes a pressure reducing pipe 8041; one end of the pressure reducing pipe 8041 is connected to the air outlet end of the Roots pump body 801, and the other end is connected to the air inlet end of the piston compressor 802; a plurality of groups of air inlet holes 8042 are arranged in a circular array on the outer wall of the pressure reducing pipe 8041; a dust filter 8043 is arranged inside the pressure reducing pipe 8041; the dust filter 8043 is located on the side of the plurality of groups of air inlet holes 8042 away from the Roots pump body 801.

[0045] When the vacuum unit is working, the second motor 9 drives the Roots pump body 801 and the piston compressor 802 to work simultaneously. The Roots pump body 801 continues to compress and discharge the gas discharged by the water ring pump mechanism 4. Since the vacuum unit is used for vacuuming, the longer the working time, the lower the air pressure at the air inlet end of the Roots pump body 801. When the air pressure difference between the air outlet end and the air inlet end of the Roots pump body 801 is too large, gas backflow is likely to occur. At this time, the piston compressor 802 draws gas through the pressure reducing tube 8041 to reduce the air pressure at the air outlet end of the Roots pump body 801. At the same time, the characteristics of the vortex tube 803 are used to output high-pressure gas to enhance the gas cooling effect, which not only improves the working efficiency and reliability of the Roots pump body, but also improves the gas cooling effect of the vortex tube.

[0046] By controlling the water ring pump mechanism 4 to perform suction, the extracted gas is separated from the working fluid through the gas-liquid separation mechanism 7 and then input into the Roots pump mechanism 8. The Roots pump mechanism 8 continues to compress and discharge the gas and refrigerate it, and then the cold air is passed into the water ring pump mechanism 4 to continuously cool the working fluid, and then the sucked gas is cooled by the working fluid, so that the cooling system can directly take away heat from the inside of the water ring pump mechanism 4 and the Roots pump mechanism 8, which not only improves the cooling effect of the vacuum unit, but also avoids the need to shut down the water ring pump mechanism 4 or the Roots pump mechanism 8 for heat dissipation when it is overheated, thereby improving the working efficiency of the vacuum unit.

[0047] By controlling the Roots pump body 801 and the piston compressor 802 to work simultaneously, the Roots pump body 801 continues to compress and discharge the gas discharged from the water ring pump mechanism 4. At this time, the piston compressor 802 draws gas through the pressure reducing pipe 8041 to reduce the gas pressure at the gas outlet end of the Roots pump body 801. At the same time, the characteristics of the vortex tube 803 are used to improve the gas cooling effect of the output high-pressure gas, which not only improves the working efficiency and reliability of the Roots pump body, but also improves the gas cooling effect of the vortex tube.

[0048] By passing the exhaust gas of the water ring pump mechanism 4 into the gas-liquid separation chamber 705, the exhaust gas after gas-liquid separation will be filtered by the gas filter 706 and then discharged from the second outlet pipe 703. When the working fluid is circulated, the working fluid of the water ring pump mechanism 4 can be extracted and discharged to the top of the liquid filter 707 through the circulation pump 6, and then filtered by the liquid filter 707 and transported back to the water ring pump mechanism 4 for use. This not only avoids impurities from entering the Roots pump mechanism 8 through the gas, but also avoids impurities from mixing in the working fluid and entering the water ring pump mechanism 4, thereby reducing the wear of the water ring pump mechanism 4 and the Roots pump mechanism 8 caused by impurities and improving the service life of the vacuum unit.

[0049] By controlling several groups of universal wheels 14 to transfer to the bottom of several groups of support blocks 13, and then controlling the second hydraulic push rod 15 to drive the support plate 11 to descend, so that several groups of universal wheels 14 are in contact with the ground and the vacuum unit is lifted, the vacuum unit can be moved. After moving to a suitable position, several groups of universal wheels 14 can be controlled to reset, and then several groups of support blocks 13 can be controlled to contact the ground and several groups of support blocks 13 can be adjusted separately, so that the vacuum unit can maintain a horizontal state on an uneven ground, thereby improving the convenience and effect of using the vacuum unit.

[0050] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An auxiliary cooling type anti-liquid accumulation water ring Roots vacuum unit, comprising a mounting seat (1); characterized in that: A top plate (3) is provided above the mounting seat (1); a water ring pump mechanism (4) and a gas-liquid separation mechanism (7) are provided on the top of the mounting seat (1); and a Roots pump mechanism (8) is provided on the top of the top plate (3); The Roots pump mechanism (8) comprises a Roots pump body (801); a piston compressor (802) is provided on one side wall of the Roots pump body (801); a pressure reducing component (804) is connected to the air inlet end of the piston compressor (802); The pressure reducing assembly (804) is in communication with the air outlet end of the Roots pump body (801); the output end of the piston compressor (802) is in communication with a vortex tube (803); the cold air port of the vortex tube (803) is in communication with the water ring pump mechanism (4); The Roots pump body and the piston compressor are controlled to work simultaneously. The piston compressor inputs high-pressure gas into the vortex tube while reducing the air pressure at the outlet end of the Roots pump body. Then the cold air generated by the vortex tube is re-introduced into the water ring pump mechanism for auxiliary cooling.

2. The auxiliary cooling type anti-liquid accumulation water ring Roots vacuum unit according to claim 1, characterized in that: The input end of the gas-liquid separation mechanism (7) is connected to the output end of the water ring pump mechanism (4); a circulation pump (6) is provided on the top of the mounting seat (1); the two ends of the circulation pump (6) are respectively connected to the water ring pump mechanism (4) and the gas-liquid separation mechanism (7); the input end of the Roots pump mechanism (8) is connected to the output end of the gas-liquid separation mechanism (7); a plurality of groups of support columns (2) are provided at the top edge of the mounting seat (1); the tops of the plurality of groups of support columns (2) are connected to the bottom edge of the top plate (3).

3. The auxiliary cooling type anti-liquid accumulation water ring Roots vacuum unit according to claim 1, characterized in that: A receiving groove (10) is provided at the bottom of the mounting seat (1); a support plate (11) is slidably connected in a vertical direction in the receiving groove (10); a plurality of groups of first hydraulic push rods (12) are provided at the bottom edge of the support plate (11); a group of support blocks (13) are transmission-connected to the output end of each group of the first hydraulic push rods (12); a group of universal wheels (14) are provided on one side wall of each group of the support blocks (13); a second hydraulic push rod (15) is provided on the top inner wall of the receiving groove (10); the output end of the second hydraulic push rod (15) is transmission-connected to the support plate (11).

4. The auxiliary cooling type anti-liquid accumulation water ring Roots vacuum unit according to claim 2, characterized in that: The water ring pump mechanism (4) comprises a water ring pump body (401); a cover body (402) is provided on one side wall of the water ring pump body (401); a first air inlet pipe (403) and a first air outlet pipe (404) are provided on a side wall of the cover body (402) away from the water ring pump body (401); a first compression chamber (405) is provided in the water ring pump body (401); a cooling groove (406) is provided on the inner wall of the first compression chamber (405) in a spiral shape.

5. The auxiliary cooling type anti-liquid accumulation water ring Roots vacuum unit according to claim 4, characterized in that: An annular heat conduction plate (407) is sleeved on the inner wall of the first compression chamber (405); a water ring impeller (408) is eccentrically installed in the first compression chamber (405); a circular plate (409) is provided on the side of the water ring impeller (408) close to the cover body (402); an air intake groove (410) is provided on the circular plate (409); the air intake groove (410) is connected to the first air intake pipe (403); a plurality of groups of air outlet grooves (411) are provided on the circular plate (409); the plurality of groups of air outlet grooves (411) are connected to the first air outlet pipe (404).

6. The auxiliary cooling type anti-liquid accumulation water ring Roots vacuum unit according to claim 4, characterized in that: The gas-liquid separation mechanism (7) comprises a tank body (701); a gas-liquid separation chamber (705) is provided in the tank body (701); a gas filter (706) and a liquid filter (707) are provided in the gas-liquid separation chamber (705) from top to bottom; a second air inlet pipe (702) is provided at the top of the tank body (701); the top end of the second air inlet pipe (702) extends to the outside of the tank body (701) and is connected to the first air outlet pipe (404); the top end of the second air inlet pipe (702) extends to the inside of the gas-liquid separation chamber (705) and is connected to the bottom of the gas filter (706).

7. The auxiliary cooling type anti-liquid accumulation water ring Roots vacuum unit according to claim 6, characterized in that: A second gas outlet pipe (703) is provided in the gas-liquid separation chamber (705); the second gas outlet pipe (703) is U-shaped; one end of the second gas outlet pipe (703) is connected to the top of the gas filter (706), and the other end extends to the outside of the tank body (701); a three-way ball valve (704) is provided on a side wall of the tank body (701); two ports of the three-way ball valve (704) are respectively connected to the top and bottom of the liquid filter (707); and the third port of the three-way ball valve (704) is connected to the circulation pump (6).

8. The auxiliary cooling type anti-liquid accumulation water ring Roots vacuum unit according to claim 1, characterized in that: A second compression chamber (805) is provided in the Roots pump body (801); a power chamber (806) is provided on a side of the second compression chamber (805) away from the piston compressor (802); two groups of rotating shafts (807) are provided in the second compression chamber (805); and a group of Roots impellers (808) are sleeved on the outer wall of each group of rotating shafts (807).

9. The auxiliary cooling type anti-liquid accumulation water ring Roots vacuum unit according to claim 8, characterized in that: One end of each set of rotating shafts (807) extends into the power chamber (806) and is transmission-connected to a set of transmission gears (809); the two sets of transmission gears (809) are meshingly connected; one end of the rotating shaft (807) located at the bottom extends into the piston compressor (802) and is transmission-connected to the piston compressor (802).

10. The auxiliary cooling type anti-liquid accumulation water ring Roots vacuum unit according to claim 1, characterized in that: The pressure reducing assembly (804) comprises a pressure reducing pipe (8041); one end of the pressure reducing pipe (8041) is connected to the air outlet end of the Roots pump body (801), and the other end is connected to the air inlet end of the piston compressor (802); a plurality of groups of air inlet holes (8042) are arranged in a circular array on the outer wall of the pressure reducing pipe (8041); a dustproof filter (8043) is arranged inside the pressure reducing pipe (8041); the dustproof filter (8043) is located on a side of the plurality of groups of air inlet holes (8042) away from the Roots pump body (801).

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