Large-displacement vacuum-assisted self-priming pump

Abstract

The utility model provides a large-displacement vacuum auxiliary self-priming pump which comprises a buffer box, the buffer box is connected with a vacuum unit and a drainage unit, the drainage unit comprises a water inlet pipe, the water inlet pipe is connected to a water inlet of the buffer box through a first flange, and a water outlet is formed in the side, corresponding to the water inlet, of the buffer box. An n-shaped bent pipe is arranged between the water inlet and the water outlet, one end of the bent pipe is connected with the water inlet, and the other end of the bent pipe is connected with the water outlet. The top of the bent pipe is communicated with a buffer tank, the water outlet is connected with the water inlet end of a centrifugal self-priming pump through a second flange, the water outlet end of the centrifugal self-priming pump is connected with a water storage tank through a third flange, and the top of the water storage tank is connected with a water outlet header pipe. The top of the buffer tank is connected with an exhaust pipe, and the exhaust pipe penetrates out of the top of the buffer tank and is connected with a vacuum unit through an exhaust branch pipe. When the large-displacement vacuum auxiliary self-sucking pump works, the vacuum unit and the drainage unit work cooperatively, so that the drainage efficiency of the drainage unit is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a self-priming pump technical field, especially in a big displacement vacuum auxiliary self-priming pump. BACKGROUND

[0002] Many earthwork projects before starting, to carry out dewatering, dewatering refers to the area where the underground water level is higher to excavate deep foundation pit, because the aquifer is cut off, under the action of pressure difference, groundwater will continue to seep into the foundation pit, if not the foundation pit dewatering work, will cause the foundation pit to be immersed, make the construction condition worse, the foundation bearing capacity drops, under the action of dynamic water pressure may also cause quicksand, piping and slope instability phenomenon, therefore, to ensure the safety of foundation pit construction, effective dewatering and drainage measures must be taken.

[0003] The implementation of the dewatering process must be assisted by a dewatering pump, the drainage capacity of the prior art drainage pump is small, the drainage capacity of most drainage pumps on the market is 10-20m³ per hour, for the project with urgent construction period, it cannot meet the demand, and an urgently needed drainage pump with large displacement is needed to improve the dewatering construction efficiency. SUMMARY

[0004] In order to solve the above technical problems, the application provides a large displacement vacuum auxiliary self-priming pump, the utility model is realized by the following technical scheme:

[0005] A large displacement vacuum auxiliary self-priming pump, comprising a buffer tank, the buffer tank is connected with a vacuum unit and a drainage unit, the drainage unit comprises a water inlet pipe, the water inlet pipe is connected to the water inlet of the buffer tank through a flange one, a water outlet is arranged on the buffer tank corresponding to the side of the water inlet, a "∩" shaped elbow pipe is arranged between the water inlet and the water outlet, one end of the elbow pipe is connected to the water inlet, and the other end of the elbow pipe is connected to the water outlet.

[0006] The top of the elbow pipe is connected with a buffer tank, the water outlet is connected with the water inlet end of a centrifugal self-priming pump through a flange two, the water outlet end of the centrifugal self-priming pump is connected with a water storage tank through a flange three, and the top of the water storage tank is connected with a water outlet main pipe.

[0007] The top of the buffer tank 1 is connected with a suction pipe, the suction pipe penetrates the top of the buffer tank and is connected with the vacuum unit through a suction branch pipe, the vacuum unit comprises a venturi ejector, the venturi ejector is installed on the buffer tank, the venturi ejector comprises a receiving chamber and a mixing chamber, the receiving chamber is arranged outside the buffer tank, the mixing chamber is arranged in the buffer tank, the suction branch pipe is connected with the receiving chamber, the top of the receiving chamber is also connected with an air inlet pipe, the air inlet pipe is connected with a vacuum pump, and the vacuum pump is installed on the same side of the centrifugal self-priming pump.

[0008] The buffer tank is connected with an overflow pipe on one side, and the overflow pipe is communicated with a water outlet main pipe through a drain pipe.

[0009] The top of the buffer tank is connected with a water injection pipe, and the water injection pipe is communicated with the water outlet main pipe through a branch pipe.

[0010] Further, the top of the air extraction pipe is connected with a pressure gauge.

[0011] Compared with the prior art, the beneficial effects of the utility model are that: the large-displacement vacuum auxiliary self-suction pump cooperates with the vacuum unit and the drainage unit during work, the vacuum unit extracts vacuum for the drainage unit, negative pressure is caused in the drainage unit, the suction force in the drainage unit is greatly increased, the drainage efficiency of the drainage unit is increased, the drainage capacity of the ordinary drainage unit is 12-20 m³ per hour, the drainage capacity of the vacuum auxiliary self-suction pump can reach 300 m³ per hour, and the drainage efficiency is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] The utility model will be described in further detail below in combination with the drawings and specific embodiments:

[0013] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;

[0014] Figure 2 It is the main view structure schematic diagram of the utility model;

[0015] Figure 3 It is the main view structure schematic diagram of the drainage unit of the utility model. CONCRETE EMBODIMENT

[0016] The utility model will be described in further detail below in combination with the drawings and specific embodiments:

[0017] A kind of large-displacement vacuum auxiliary self-suction pump, including buffer tank 1, the buffer tank 1 connects vacuum unit 2, drainage unit 3, the drainage unit 3 includes water inlet pipe 31, the water inlet pipe 31 is connected on the water inlet 101 of buffer tank 1 by flange one 32, the water inlet 101 corresponding side is equipped with water outlet 102 on buffer tank 1, a "∩" shaped bend pipe 4 is equipped between the water inlet 101 and water outlet 102, one end of the bend pipe 4 is connected with water inlet 101, and the other end is connected with water outlet 102.

[0018] The top of the bend pipe 4 is connected with a buffer tank 5, the water outlet 102 is connected with the water inlet end of centrifugal self-suction pump 7 by flange two 6, the water outlet end of centrifugal self-suction pump 7 is connected with water storage tank 9 by flange three 8, and the top of water storage tank 9 is connected with water outlet main pipe 91.

[0019] The buffer tank 1 top connection a suction pipe 10, the suction pipe 10 out of the buffer tank 1 top, and through a suction branch pipe 11 connected to the vacuum unit 2, the vacuum unit 2 includes a venturi ejector 12, the venturi ejector 12 is installed on the buffer tank 1, the venturi ejector 12 includes the receiving chamber 121, mixing chamber 122, the receiving chamber 121 is placed outside the buffer tank 1, the mixing chamber 122 is placed in the buffer tank 1, the suction branch pipe 11 is connected to the receiving chamber 121, the top of the receiving chamber 121 is also connected to the intake pipe 13, the intake pipe 13 is connected to a vacuum pump 14, the vacuum pump 14 is installed on the buffer tank 1 with the centrifugal self-priming pump 7 side.

[0020] The buffer tank 1 side connection overflow pipe 15, the overflow pipe 15 through the drain pipe 16 with the water outlet main pipe 91 communication.

[0021] The buffer tank 1 top connection a water injection pipe 17, the water injection pipe 17 through the branch pipe 171 with the water outlet main pipe 91 communication.

[0022] Further, the top of the suction pipe 10 is connected with pressure gauge 18.

[0023] The large displacement vacuum assisted self-priming pump in use, the centrifugal self-priming pump 7 of the drainage unit 3 works, the water needs to be discharged in turn through the water inlet 101, elbow 4, water outlet 102 into the water storage tank 9, the water in the water storage tank 9 is discharged through the water outlet main pipe 91, because the water extracted will be mixed with air, and because of the setting of the elbow 4, in the process of water discharge, air will be in the upper part of the elbow 4, because the elbow 4 is connected with the buffer tank 1, the buffer tank 1 top connection a suction pipe 10, the suction pipe 10 out of the buffer tank 1 top, and through a suction branch pipe 11 connected to the venturi ejector 12 receiving chamber 121, when the vacuum pump 14 works, the gas mixed with water vapor in the elbow 4 will be sent into the receiving chamber 121 of the venturi ejector 12 through the buffer tank 1, suction pipe 10, suction branch pipe 11, at the same time, the vacuum pump 14 sends air into the receiving chamber 121 of the venturi ejector 12 through the intake pipe 13, the air sent into the receiving chamber 121 of the venturi ejector 12 through the intake pipe 13 will be ejected at high speed, the receiving chamber 121 produces low pressure, the receiving chamber 121 also communicates with the suction branch pipe 11, so that the gas in the upper part of the elbow 4 will be sucked into the receiving chamber 121 of the venturi ejector 12 through the buffer tank 1, suction pipe 10, suction branch pipe 11, because there is still flowing water in the elbow 4, the gas in the elbow 4 is sucked into the receiving chamber 121 at the same time, mixed with water vapor, the air of the intake pipe 13 and the water vapor sent by the suction branch pipe 11 are mixed in the mixing chamber 122, and then expanded through the expansion pipe of the venturi ejector 12, the kinetic energy is converted into pressure energy, the gas in the elbow 4 is sucked away, the pressure in the elbow decreases, and the water suction capacity of the elbow 4 increases, so the drainage capacity of the whole device is enhanced, and the drainage efficiency is improved.

[0024] The water vapor sprayed by the Venturi ejector 12 enters the buffer tank 1, the top of the buffer tank 1 is connected with a water injection pipe 17, the water injection pipe 17 is communicated with a water outlet main pipe 91 through a branch pipe 171, the water outlet main pipe 91 discharges water, and part of the water is sent into the buffer tank 1 through the branch pipe 171 and the water injection pipe 17, so as to cool the vacuum pump 14 and the Venturi ejector 12 connected with the buffer tank 1, when the water level in the buffer tank 1 is too high, the buffer tank 1 is connected with an overflow pipe 15 on one side, the water in the buffer tank 1 is sequentially discharged into the water outlet main pipe 91 through the overflow pipe 15 and a first drain pipe 16, and is discharged through the water outlet main pipe 91, so that the water in the buffer tank 1 realizes circulating flow, and the cooling effect of the vacuum pump 14 and the Venturi ejector 12 is improved.

[0025] The specific embodiments of the utility model are described in detail above, but only as an example, the utility model is not limited to the specific embodiments described above, and equivalent modifications of the utility model are also within the protection scope of the utility model.

Claims

1. A large capacity vacuum assisted self-priming pump characterized by, The application relates to a buffer tank (1) connected with a vacuum unit (2) and a drainage unit (3), wherein the drainage unit (3) comprises a water inlet pipe (31) connected with a water inlet (101) of the buffer tank (1) through a flange (32), a water outlet (102) is arranged on the buffer tank (1) at a side corresponding to the water inlet (101), a '' intersection '' shaped bend pipe (4) is arranged between the water inlet (101) and the water outlet (102), one end of the bend pipe (4) is connected with the water inlet (101), and the other end of the bend pipe (4) is connected with the water outlet (102); a buffer tank (5) is connected with the top of the bend pipe (4), a water inlet end of a centrifugal self-suction pump (7) is connected with the water outlet (102) through a flange (6), a water outlet end of the centrifugal self-suction pump (7) is connected with a water storage tank (9) through a flange (8), and the top of the water storage tank (9) is connected with a water outlet main pipe (91); an air extraction pipe (10) is connected with the top of the buffer tank (5), the air extraction pipe (10) penetrates through the top of the buffer tank (1) and is connected with the vacuum unit (2) through an air extraction branch pipe (11), the vacuum unit (2) comprises a Venturi ejector (12), the Venturi ejector (12) is arranged on the buffer tank (1), the Venturi ejector (12) comprises a receiving chamber (121) and a mixing chamber (122), the receiving chamber (121) is arranged outside the buffer tank (1), the mixing chamber (122) is arranged in the buffer tank (1), the air extraction branch pipe (11) is connected with the receiving chamber (121), the top of the receiving chamber (121) is further connected with an air inlet pipe (13), the air inlet pipe (13) is connected with a vacuum pump (14), and the vacuum pump (14) is arranged on the same side of the buffer tank (1) as the centrifugal self-suction pump (7); an overflow pipe (15) is connected with one side of the buffer tank (1), and the overflow pipe (15) is communicated with the water outlet main pipe (91) through a drainage pipe (16); a water injection pipe (17) is connected with the top of the buffer tank (1), and the water injection pipe (17) is communicated with the water outlet main pipe (91) through a branch pipe (171).

2. The large capacity vacuum assisted self-priming pump of claim 1, wherein, A pressure gauge (18) is connected with the top of the air extraction pipe (10).

Images