Vacuum pump set of foundation pit deep well dewatering zone gas-water separator

Abstract

The invention discloses a vacuum pump set of a foundation pit deep well dewatering zone gas-water separator. The vacuum pump set comprises a separator body, a mechanical vacuum pump, a water pump, a vacuum pump water tank and an electric control cabinet. The separator body is arranged for the mechanical vacuum pump, water-gas separation is achieved, water-gas mixture entering the mechanical vacuum pump is reduced, mechanical abrasion is reduced, heating of the vacuum pump is restrained, and the service life is prolonged; the separator body has the functions of water-gas separation, cavity division and pressure balance conversion by dividing each cavity in the separator body, arranging the valves and applying the PLC to control the valves, so that the separator body has the functions of water-gas separation, cavity division and pressure balance conversion, drainage of a water pump is facilitated, the situation that an existing separation device is difficult to drain water is improved, and the separation efficiency is improved. The advantage of high water pumping efficiency of the mechanical vacuum pump is brought into full play, and continuous work of the mechanical vacuum pump is not affected by water-gas separation in a drainage link.

Description

Technical Field

[0001] The invention relates to the technical field of deep foundation pit dewatering, in particular to a vacuum pump group with a gas-water separator for foundation pit deep well dewatering. Background Art

[0002] In deep foundation pit dewatering, the application of vacuum pumps for vacuum deep well dewatering has the following problems: jet vacuum pumps and mechanical vacuum pumps are the two most commonly used water pumps. Jet vacuum pumps have high wear resistance, so they are conducive to the extraction of water-gas mixtures during deep foundation pit dewatering. The problem is that the jet vacuum pump has a small amount of air pumped per unit power consumption, the circulating water heats up quickly, and it is easy to lack water. After lack of water, the vacuum degree decreases, resulting in low water pumping efficiency or even inability to pump out water in the deep well; the mechanical vacuum pump has a large amount of air pumped per unit power consumption and high water pumping efficiency, but the problem is that due to the presence of gravel in the water-gas mixture, the mechanical wear is particularly fast and the maintenance cost is particularly high, making it difficult to meet the requirements for the extraction of water-gas mixtures during deep foundation pit dewatering. In addition, deep foundation pit dewatering requires long-term continuous operation. Due to the rapid heating of the circulating water, the mechanical vacuum pump heats up and cannot work continuously; in the prior art CN 115405488 In A [A vacuum pump group with gas-water separator for deep well dewatering of foundation pit], the publicly disclosed vacuum pump group with gas-water separator has been proved by practice to still have the following defects: complex structure, heating problem of mechanical vacuum pump, inability to clean the separator body, and unreasonable selection of actuators such as valves; in view of the above defects, a vacuum pump group is designed to give full play to the advantage of high water pumping efficiency of mechanical vacuum pump, reduce the heating and mechanical wear of mechanical vacuum pump and extend the service life of mechanical vacuum pump, while ensuring that the drainage link of water-gas separation does not affect the continuous operation of mechanical vacuum pump, which will be the key to improving the efficiency of deep foundation pit dewatering. Summary of the invention

[0003] The purpose of the present invention is to provide a vacuum pump group with a gas-water separator for deep well dewatering in foundation pits in view of the deficiencies in the prior art. The present invention adopts a combination of a separator body, a mechanical vacuum pump and a water pump. By equipping the mechanical vacuum pump with a separator body, water and gas in the separator body are separated, and the water-gas mixture entering the mechanical vacuum pump is reduced, thereby reducing mechanical wear. By changing the structure, setting and control of the vacuum pump water tank, the heating problem of the mechanical vacuum pump is solved. By setting a water gun, the cleaning problem of the separator body is solved. Replacing valves and simplifying execution components is beneficial to the automatic control of valves by a PLC programmable controller, so that the present invention has the characteristics of automatic completion of water-gas separation in the cavity, pressure conversion, continuous vacuuming and intermittent discharge of the water pump, so as to give full play to the advantage of the high water pumping efficiency of the mechanical vacuum pump, and ensure that the drainage link of water-gas separation is completed under the continuous working state of the mechanical vacuum pump.

[0004] The specific technical solution for achieving the purpose of the present invention is: A vacuum pump set with a gas-water separator for foundation pit deep well dewatering, which features a separator body, a mechanical vacuum pump, a water pump, vacuum pump water, an electric control cabinet and a water gun; The separator body is in the shape of a tank, and is divided into an upper cavity and a lower cavity by a transverse partition, and the lower cavity is a second water storage cavity; the upper cavity is further divided into a water-gas separation cavity and a first water storage cavity by a vertical overflow partition and a transverse partition, and the water-gas separation cavity and the first water storage cavity are semi-enclosed, and a mutually interpenetrating vacuum cavity is provided on the top of the overflow partition; The top of the separator body is connected to the vacuum chamber and is provided with a vacuum pump suction interface, a first connecting pipe interface and a well pipe interface; one side of the separator body is connected to the second water storage chamber and is provided with a second connecting pipe interface; the other side of the separator body is connected to the second water storage chamber and is provided with a water pump interface and a water gun interface; A water-gas sinking pipe is provided in the water-gas separation chamber, one end of which is inserted through the well pipe interface, and the lower end of which is close to the diaphragm and is in an open state; The first interface of the connecting pipe is connected to the second interface of the connecting pipe through the connecting pipe, and a two-position three-way valve is provided between the two interfaces of the connecting pipe; A liquid level control one-way valve is provided on the diaphragm between the second water storage chamber and the first water storage chamber; A liquid level probe is provided in the second water storage chamber from the bottom to the top; The mechanical vacuum pump is provided with a vacuum pump air intake port, a vacuum pump air exhaust port and a vacuum pump water inlet, and the vacuum pump air intake port is provided with a vacuum pump check valve; The water pump is provided with a water pump suction port and a water pump discharge port, the water pump suction port is provided with a water pump check valve, the water pump discharge port is provided with a tee, and the tee is provided with a water pump discharge valve, a water gun control valve and a water tank water supply valve in sequence; The vacuum pump water tank is provided with a water tank air inlet, a water tank exhaust port, a water tank water supply port and a water tank water replenishment port. The water tank water replenishment port is provided with a filter screen. The vacuum pump water tank is provided with a water full stop function. The mechanical vacuum pump and water pump are arranged on the outside of the separator body; The vacuum pump water tank is arranged in the water-gas separation chamber of the separator body; The water gun is arranged in the second water storage chamber of the separator body and connected to the water gun interface; The vacuum pump suction port of the mechanical vacuum pump is connected to the vacuum pump suction interface pipeline of the separator body through the vacuum pump check valve, the vacuum pump exhaust port is connected to the water tank air inlet pipeline of the vacuum pump water tank, and the vacuum pump water inlet is connected to the water tank water supply port of the vacuum pump water tank; The water pump suction port of the water pump is connected to the water pump interface of the separator body through a water pump check valve, the water gun control valve is connected to the water gun interface of the separator body, and the water tank water supply valve is connected to the water tank water supply port of the vacuum pump water tank through a filter screen; The electric control cabinet is arranged outside the separator body; a PLC programmable controller is arranged inside the electric control cabinet, and the PLC programmable controller is electrically connected with the mechanical vacuum pump, the water pump, the liquid level probe and the two-position three-way valve respectively.

[0005] The separator body is provided with at least one maintenance hole.

[0006] A vacuum gauge is provided on the vacuum chamber of the separator body.

[0007] The vacuum pump water tank is a multi-heat dissipation surface water tank with a plurality of grooves arranged on the box body.

[0008] The technical effect produced by the present invention is 1) Complete water-gas separation in the vacuum chamber The present invention provides a water-gas separation chamber, a first water storage chamber and a second water storage chamber in a separator body. When working, a water-gas mixture enters the water-gas separation chamber and is guided to the lower end of the water-gas sinking pipe by the water-gas sinking pipe, that is, discharged from the bottom of the water-gas separation chamber, and water is deposited in the water-gas separation chamber. When the water level in the water-gas separation chamber exceeds the overflow baffle, it flows into the first water storage chamber, so that the water and gas in the separator body are separated; at the same time, a vacuum chamber is retained on the top of the overflow baffle, and the air is sucked out by the mechanical vacuum pump through the vacuum pump suction interface of the vacuum chamber, and the vacuum degree of the vacuum chamber is monitored by a vacuum meter; a vacuum chamber with water-gas separation function is realized in the separator body, and the phenomenon that gravel in the water-gas mixture enters the mechanical vacuum pump during the working process of the mechanical vacuum pump is eliminated, and the defects of the mechanical vacuum pump in the vacuum precipitation working process, such as fast mechanical wear of the vacuum pump, high maintenance cost and short service life, are completely solved.

[0009] 2) Convenient water pump to automatically and intermittently drain water from the separator body In order to facilitate the automatic intermittent drainage of the water pump from the separator body and to meet the purpose of achieving continuous operation of the mechanical vacuum pump, the present invention provides a liquid level control one-way valve on the diaphragm between the second water storage chamber and the first water storage chamber, a connecting pipe is provided between the second water storage chamber and the first water storage chamber, and a two-position three-way valve is provided between the two interfaces of the connecting pipe; when the first water storage chamber stores water, the two-position three-way valve connects the second water storage chamber and the first water storage chamber, the separator body is in the same vacuum state, and the vacuum degree of the vacuum chamber is maintained; When the second water storage chamber is drained, the water pump is turned on. At the same time, the two-position three-way valve cuts off the passage between the second water storage chamber and the first water storage chamber, switching the second water storage chamber to be connected to the atmosphere. At this time, the pressure in the second water storage chamber rises, which is conducive to the water pump to drain water from the separator body.

[0010] 3) Implement circulating water cooling for mechanical vacuum pumps The present invention places the vacuum pump water tank in the water-gas separation chamber of the separator body, and uses the water in the water-gas separation chamber to cool the vacuum pump water tank. In order to improve the cooling efficiency, a plurality of grooves are arranged on the box body of the vacuum pump water tank to increase the heat dissipation surface of the vacuum pump water tank. Since the vacuum pump exhaust port of the mechanical vacuum pump is connected to the water tank air inlet pipeline of the vacuum pump water tank, and the vacuum pump water inlet is connected to the water tank water supply port of the vacuum pump water tank, a circulating water cooling system is formed between the vacuum pump water tank and the mechanical vacuum pump to complete the circulating water cooling of the mechanical vacuum pump. In order to ensure the water quality in the vacuum pump water tank, the present invention arranges a filter on the pipeline between the water tank water replenishment valve and the water tank water replenishment port.

[0011] 4) It is conducive to the discharge and cleaning of the separator body The present invention arranges a water gun in the second water storage chamber of the separator body, and the water gun is connected with the water gun control valve and the water pump through the water gun interface, so as to discharge sewage and clean the separator body regularly. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the electrical control connection of the present invention. DETAILED DESCRIPTION

[0013] See also Figure 1 , Figure 2 The present invention includes a separator body 1, a mechanical vacuum pump 2, a water pump 3, a vacuum pump water tank 4, an electric control cabinet 5 and a water gun 6; See also Figure 1 The separator body 1 is in the shape of a tank, and is divided into an upper cavity and a lower cavity by a transverse partition 111, and the lower cavity is a second water storage cavity 112; the upper cavity is further divided into a water-gas separation cavity 114 and a first water storage cavity 115 by a vertical overflow partition 113 and the transverse partition 111, and the water-gas separation cavity 114 and the first water storage cavity 115 are semi-enclosed, and a vacuum cavity 116 that is mutually connected is provided on the top of the overflow partition 113; The top of the separator body 1 is connected to the vacuum chamber 116 and is provided with a vacuum pump suction interface 11, a first connecting pipe interface 12 and a well pipe interface 16; one side of the separator body 1 is connected to the second water storage chamber 112 and is provided with a second connecting pipe interface 13; the other side of the separator body 1 is connected to the second water storage chamber 112 and is provided with a water pump interface 14 and a water gun interface 17; The water-gas separation chamber 114 is provided with a water-gas sinking pipe 161, one end of which is inserted into the well pipe interface 16, and the lower end of which is close to the diaphragm 111 and is in an open state; The first connection port 12 of the connecting pipe is connected to the second connection port 13 of the connecting pipe via a connecting pipe 15, and a two-position three-way valve 151 is provided between the two connections of the connecting pipe 15; A liquid level control one-way valve 121 is provided on the diaphragm 111 between the second water storage chamber 112 and the first water storage chamber 115; A liquid level probe 122 is disposed in the second water storage chamber 112 from the bottom to the top.

[0014] See also Figure 1 The mechanical vacuum pump 2 is provided with a vacuum pump air intake port 21 , a vacuum pump air exhaust port 22 and a vacuum pump water inlet 23 , and the vacuum pump air intake port 21 is provided with a vacuum pump check valve 24 .

[0015] See also Figure 1 The water pump 3 is provided with a water pump water intake port 31 and a water pump water discharge port 32. The water pump water intake port 31 is provided with a water pump check valve 33. The water pump water discharge port 32 is provided with a three-way valve. The three-way valve is provided with a water pump discharge valve 34, a water gun control valve 35 and a water tank water replenishment valve 36 in sequence.

[0016] See also Figure 1 The vacuum pump water tank 4 is provided with a water tank air inlet 41, a water tank exhaust port 42, a water tank water supply port 43 and a water tank water replenishment port 44. A filter screen 47 is provided on the water tank water replenishment port 44. A water full stop 45 is provided in the vacuum pump water tank 4.

[0017] See also Figure 1 , the mechanical vacuum pump 2 and the water pump 3 are arranged on the outside of the separator body 1; The vacuum pump water tank 4 is disposed in the water-gas separation chamber 114 of the separator body 1 ; the water gun 6 is disposed in the second water storage chamber 112 of the separator body 1 and connected to the water gun interface 17 .

[0018] See also Figure 1 The vacuum pump suction port 21 of the mechanical vacuum pump 2 is connected to the vacuum pump suction interface 11 of the separator body 1 through a vacuum pump check valve 24, the vacuum pump exhaust port 22 is connected to the water tank air inlet 41 of the vacuum pump water tank 4 through a pipeline, and the vacuum pump water inlet 23 is connected to the water tank water supply port 43 of the vacuum pump water tank 4.

[0019] See also Figure 1 The water pump suction port 31 of the water pump 3 is connected to the water pump interface 14 of the separator body 1 through the water pump check valve 33, the water gun control valve 35 is connected to the water gun interface 17 of the separator body 1, and the water tank water replenishment valve 36 is connected to the water tank water replenishment port 44 of the vacuum pump water tank 4 through the filter screen 47.

[0020] See also Figure 1 , Figure 2 The electric control cabinet 5 is arranged on the outside of the separator body 1; a PLC programmable controller is arranged in the electric control cabinet 5, and the PLC programmable controller is electrically connected to the mechanical vacuum pump 2, the water pump 3, the liquid level probe 122 and the two-position three-way valve 151 respectively.

[0021] See also Figure 1 The separator body 1 is provided with at least one maintenance hole.

[0022] See also Figure 1 A vacuum gauge 18 is provided on the vacuum chamber 116 of the separator body 1.

[0023] See also Figure 1 The vacuum pump water tank 4 is a multi-heat dissipation surface water tank with a plurality of grooves 46 on the box body.

[0024] Working process of the present invention: See also Figure 1 , Figure 2 , the present invention is a combination of a separator body 1, a mechanical vacuum pump 2, a water pump 3, a vacuum pump water tank 4 and an electric control cabinet 5; The present invention forms a vacuum in the separator body 1 through the operation of the mechanical vacuum pump 2, and connects the other end of the water vapor sinking pipe 161 arranged in the water vapor separation chamber 114 to the foundation pit deep well, thereby achieving the purpose of dewatering the deep foundation pit.

[0025] See also Figure 1 The separator body 1 of the present invention is provided to protect the mechanical vacuum pump 2. First, the water-gas mixture extracted from the deep well of the foundation pit is separated in the water-gas separation chamber 114 to prevent the water-gas mixture and gravel from directly entering the mechanical vacuum pump 2; second, a vacuum pump water tank 4 is provided at the front end of the vacuum pump water inlet 23 of the mechanical vacuum pump 2, and the vacuum pump water tank 4 is placed in the water-gas separation chamber 114 of the separator body 1, which is easy to cool the water tank. At the same time, the water entering the vacuum pump water tank 4 is filtered by the filter screen 47, so that the cooled and filtered water enters the mechanical vacuum pump 2 for cooling circulation, which not only solves the problem of excessive wear of the mechanical vacuum pump, but also solves the problem of heat generation caused by continuous operation of the mechanical vacuum pump 2.

[0026] See also Figure 1During operation, since the separator body 1 is in a vacuum state, it is not conducive to the drainage of the water pump 3. In order to facilitate the drainage of the separator body 1, the present invention arranges a transverse partition 111 in the separator body 1, and divides the separator body 1 into an upper cavity and a lower cavity arranged up and down, the lower cavity is a second water storage cavity 112, a first connecting pipe interface 12 is arranged in the upper cavity, and a second connecting pipe interface 13 is arranged in the lower cavity, the first interface 12 and the second interface 13 are connected through a connecting pipe 15, and a two-position three-way valve 151 is arranged between the two interfaces of the connecting pipe 15, and the two-position three-way valve 151 is cut by The upper cavity is connected with the lower cavity, or the upper cavity is disconnected from the lower cavity and the lower cavity is connected with the atmosphere; when the water pump 3 does not drain water, the upper cavity is connected with the lower cavity by switching the two-position three-way valve 151, and they are in the same vacuum state, and the mechanical vacuum pump 2 works normally; when the water pump 3 drains water, the upper cavity is disconnected from the lower cavity and the lower cavity is connected with the atmosphere, and the pressure in the second water storage chamber 112 of the lower cavity increases, which is conducive to drainage, while the upper cavity is still in a vacuum state, and the mechanical vacuum pump 2 continues to work normally, and the drainage is completed, and the two-position three-way valve 151 is switched, and the cycle is repeated. Example

[0027] Continuous pumping of mechanical vacuum pumps and intermittent drainage of water pumps See also Figure 1 , Figure 2 , controlled by the PLC programmable controller of the electric control cabinet 5, the mechanical vacuum pump 2 is turned on, the vacuum pump check valve 24 opens automatically, and the two-position three-way valve 151 is switched to make the upper cavity and the lower cavity in a connected state; the separator body 1 begins to be depressurized, and the water and water-gas mixture sucked by the water pumping pipe in the deep well of the foundation pit flows through the water-gas sinking pipe 161 to the water-gas separation chamber 114 to implement water-gas separation, wherein water is deposited in the water-gas separation chamber 114, and the gas is extracted by the mechanical vacuum pump 2 through the vacuum pump suction interface 11 of the vacuum chamber 116, and the separator body 1 is in a vacuum state, realizing that the mechanical vacuum pump 2 sucks the water and water-gas mixture in the deep well of the foundation pit through the water pumping pipe.

[0028] See also Figure 1 , Figure 2 As the water level in the water-gas separation chamber 114 increases, the water level exceeds the overflow baffle 113 and flows into the first water storage chamber 115. When the water in the first water storage chamber 115 is stored to the set upper limit quantity, at this time, the liquid level control one-way valve 121 opens, and the water in the first water storage chamber 115 flows into the second water storage chamber 112 through the liquid level control one-way valve 121, and the water begins to drain from the first water storage chamber 115 to the second water storage chamber 112.

[0029] See also Figure 1 , Figure 2As the water level in the second water storage chamber 112 increases, when the water level reaches the set upper limit, it touches the upper limit contact of the liquid level probe 122 in the second water storage chamber 112. The liquid level probe 122 triggers the PLC programmable controller to work at the upper limit, starts the water pump 3, switches the two-position three-way valve 151 to disconnect the upper cavity and the lower cavity and connect the lower cavity to the atmosphere. Since the two-position three-way valve 151 is connected to the atmosphere, the second water storage chamber 112 begins to be pressurized, which makes it easier for the water pump 3 to extract water from the second water storage chamber 112. The water in the second water storage chamber 112 is discharged through the water pump check valve 33, the water pump drain port 32 and the water pump drain valve 34.

[0030] See also Figure 1 , Figure 2 When the water in the first water storage chamber 115 is drained to the set lower limit, the liquid level control one-way valve 121 closes automatically, completing the water discharge from the first water storage chamber 115 to the second water storage chamber 112. Since the liquid level control one-way valve 121 is provided on the diaphragm 111 between the second water storage chamber 112 and the first water storage chamber 115, the water vapor in the second water storage chamber 112 cannot flow back into the first water storage chamber 115.

[0031] See also Figure 1 , Figure 2 When the water level in the second water storage chamber 112 reaches the set lower limit, it touches the lower limit contact of the liquid level probe 122 in the second water storage chamber 112. The liquid level probe 122 triggers the PLC programmable controller to work at the lower limit, shuts down the water pump 3, switches the two-position three-way valve 151 to connect the upper cavity with the lower cavity, that is, disconnects the lower cavity from the atmosphere, and repeats the above process to achieve intermittent drainage of the water pump 3 and continuous suction of water and water-gas mixture in the deep well of the foundation pit by the mechanical vacuum pump 2 through the suction pipe.

[0032] See also Figure 1 , Figure 2 In order to facilitate the flow of gas between the upper cavity and the lower cavity, the connecting pipe 15 of the present invention is provided with a first interface 12 and a second interface 13, the first interface 12 is provided above the first water storage cavity 115, and the second interface 13 is provided above the second water storage cavity 112. Example

[0033] The process of circulating water cooling a mechanical vacuum pump See also Figure 1 , Figure 2 Since the vacuum pump exhaust port 22 of the mechanical vacuum pump 2 is connected to the water tank air inlet 41 of the vacuum pump water tank 4 through a pipeline, and the vacuum pump water inlet 23 is connected to the water tank water supply port 43 of the vacuum pump water tank 4, a circulating water cooling system is formed between the vacuum pump water tank 4 and the mechanical vacuum pump 2, thereby completing the circulating water cooling of the mechanical vacuum pump; In order to lower the temperature of the circulating water, the present invention places the vacuum pump water tank 4 in the water-gas separation chamber 114 of the separator body 1, and uses the water in the water-gas separation chamber 114 to cool the vacuum pump water tank 4. In order to improve the cooling efficiency, a plurality of grooves 46 are provided on the body of the vacuum pump water tank 4 to increase the heat dissipation surface of the vacuum pump water tank 4, thereby solving the heating problem of the mechanical vacuum pump 2 during continuous operation. In order to ensure the water quality in the vacuum pump water tank 4, the present invention provides a filter 47 on the pipeline between the water tank water replenishment valve 36 and the water tank water replenishment port 44; In order to ensure the water level in the vacuum pump water tank 4, the opening degree of the water tank water replenishment valve 36 is manually adjusted. During the drainage process of the water pump 3, the water discharged by the water pump 3 passes through the water tank water replenishment valve 36 and the filter 47 through the water tank water replenishment port 44 to replenish the vacuum pump water tank 4. At the same time, a water full stop 45 is set in the vacuum pump water tank 4. When the water level reaches the set position, the water replenishment is stopped. Example

[0034] Cleaning process of the separator body See also Figure 1 , Figure 2 During the deep well dewatering process of the foundation pit, the equipment needs to be maintained regularly and the separator body 1 needs to be cleaned. During cleaning, the mechanical vacuum pump 2 stops working to keep the water level in the second water storage chamber 112 at the required height for cleaning. The water pump drain valve 34 and the water tank water replenishment valve 36 are manually closed, the water gun control valve 35 is manually opened, and then the water pump 3 is turned on. The water pump 3 draws water from the second water storage chamber 112, and then the water is sprayed into the second water storage chamber 112 through the water pump drain port 32 and the water gun control valve 35 through the water gun 6 to impact the sediment in the second water storage chamber 112; after the impact is completed, the water gun control valve 35 is closed, and the water pump drain valve 34 is opened to discharge the water in the second water storage chamber 112 to complete the cleaning of the separator body 1.

Claims

1. A vacuum pump set with a gas-water separator for foundation pit deep well dewatering, characterized in that: It comprises a separator body (1), a mechanical vacuum pump (2), a water pump (3), a vacuum pump water tank (4), an electric control cabinet (5) and a water gun (6); The separator body (1) is in the shape of a tank, and is divided into an upper cavity and a lower cavity arranged in the upper and lower parts by a transverse partition (111), and the lower cavity is a second water storage cavity (112); the upper cavity is further divided into a water-gas separation cavity (114) and a first water storage cavity (115) arranged in the left and right parts by a vertical overflow partition (113) and the transverse partition (111), and the water-gas separation cavity (114) and the first water storage cavity (115) are in a semi-enclosed state, and a vacuum cavity (116) which is interconnected is provided on the top of the overflow partition (113); The top of the separator body (1) is connected to the vacuum chamber (116) and is provided with a vacuum pump suction interface (11), a first connecting pipe interface (12) and a well pipe interface (16); one side of the separator body (1) is connected to the second water storage chamber (112) and is provided with a second connecting pipe interface (13); the other side of the separator body (1) is connected to the second water storage chamber (112) and is provided with a water pump interface (14) and a water gun interface (17); A water vapor sinking pipe (161) is provided in the water vapor separation chamber (114), one end of the water vapor sinking pipe (161) is inserted through the well pipe interface (16), and the lower end of the water vapor sinking pipe (161) is close to the transverse partition (111) and is in an open state; The first connection port (12) of the connecting pipe is connected to the second connection port (13) of the connecting pipe via the connecting pipe (15), and a two-position three-way valve (151) is provided between the two connections of the connecting pipe (15); A liquid level control one-way valve (121) is provided on the transverse partition (111) between the second water storage chamber (112) and the first water storage chamber (115); A liquid level probe (122) is provided in the second water storage chamber (112) from the bottom to the top; The mechanical vacuum pump (2) is provided with a vacuum pump air intake port (21), a vacuum pump air exhaust port (22) and a vacuum pump water inlet (23); the vacuum pump air intake port (21) is provided with a vacuum pump check valve (24); The water pump (3) is provided with a water pump water intake port (31) and a water pump water discharge port (32); the water pump water intake port (31) is provided with a water pump check valve (33); the water pump water discharge port (32) is provided with a tee, and the tee is provided with a water pump water discharge valve (34), a water gun control valve (35) and a water tank water supply valve (36) in sequence; The vacuum pump water tank (4) is provided with a water tank air inlet (41), a water tank air outlet (42), a water tank water supply port (43) and a water tank water replenishment port (44); a filter screen (47) is provided on the water tank water replenishment port (44); and a water full stop (45) is provided in the vacuum pump water tank (4); The mechanical vacuum pump (2) and the water pump (3) are arranged outside the separator body (1); The vacuum pump water tank (4) is arranged in the water-gas separation chamber (114) of the separator body (1); The water gun (6) is arranged in the second water storage chamber (112) of the separator body (1) and is connected to the water gun interface (17); The vacuum pump air intake port (21) of the mechanical vacuum pump (2) is connected to the vacuum pump air intake interface (11) of the separator body (1) through a vacuum pump check valve (24); the vacuum pump air exhaust port (22) is connected to the water tank air inlet (41) of the vacuum pump water tank (4) through a pipeline; and the vacuum pump water inlet (23) is connected to the water tank water supply port (43) of the vacuum pump water tank (4); The water pump water suction port (31) of the water pump (3) is connected to the water pump interface (14) of the separator body (1) via a water pump check valve (33); the water gun control valve (35) is connected to the water gun interface (17) of the separator body (1); and the water tank water supply valve (36) is connected to the water tank water supply port (44) of the vacuum pump water tank (4) via a filter screen (47); The electric control cabinet (5) is arranged outside the separator body (1); a programmable logic controller (PLC) is arranged inside the electric control cabinet (5); the programmable logic controller (PLC) is electrically connected to the mechanical vacuum pump (2), the water pump (3), the liquid level probe (122) and the two-position three-way valve (151) respectively.

2. A vacuum pump set with a gas-water separator for foundation pit deep well dewatering according to claim 1, characterized in that: The separator body (1) is provided with at least one maintenance hole.

3. A vacuum pump set with a gas-water separator for foundation pit deep well dewatering according to claim 1, characterized in that: A vacuum gauge (18) is provided on the vacuum chamber (116) of the separator body (1).

4. A vacuum pump set with a gas-water separator for foundation pit deep well dewatering according to claim 1, characterized in that: The vacuum pump water tank (4) is a multi-heat dissipation surface water tank with a plurality of grooves (46) provided on the box body.

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