Negative pressure station

Abstract

The utility model belongs to the technical field of vacuum negative pressure stations, and provides a negative pressure station which comprises two vacuum pumps, namely a vacuum pump A and a vacuum pump B, the vacuum pump A is equipped with a vacuum tank A and the vacuum pump B is equipped with a vacuum tank B; each vacuum tank is formed by assembling a bottom cover, a top cover and a shell, and each top cover is provided with an extraction opening and an exhaust opening; an air suction port of the vacuum pump A is communicated with an air extraction port of the vacuum tank A through an electric valve II; an air supply port of the vacuum pump A is communicated with an exhaust port of the vacuum tank B through an electric valve IV and an electric valve i; an air suction port of the vacuum pump B is connected with an air extraction port of the vacuum tank B through an electric valve VI; and an air supply port of the vacuum pump B is communicated with an exhaust port of the vacuum tank A through an electric valve VII, an electric valve IV and an electric valve III. When the device works, two operations of vacuumizing and draining are completed by using one vacuum pump, so that the device structure is simplified, the device cost is reduced, the device failure rate is reduced, and the energy consumption is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of vacuum negative pressure stations, in particular to a negative pressure station. Background Art

[0002] Negative pressure drainage technology is a technology widely used in the reconstruction of rainwater and sewage diversion in old urban areas. Its main principle is to generate negative pressure in the vacuum tank through a vacuum pump, so as to suck in sewage and discharge it to a designated location. This technology has the advantages of high efficiency and speed in treating urban sewage, and is especially suitable for areas with complex terrain and difficult pipeline laying. However, traditional negative pressure station equipment is complex and usually requires multiple vacuum pumps, sewage pumps and instruments for vacuuming and drainage, which not only increases the equipment cost, but also increases the difficulty of maintenance and management.

[0003] In order to solve the above problems, a technical solution has proposed the use of electric valves to optimize the import and export pipeline system of the vacuum pump. By switching the electric valve, one vacuum pump can be used to complete the two operations of "vacuuming" and "draining", thereby reducing the number of equipment and simplifying the control system. For example, the negative pressure station for the negative pressure drainage system disclosed in CN2716368Y uses two main and auxiliary vacuum tanks. The sewage in the negative pressure pipeline is sucked into the main vacuum tank. When the sewage level reaches the upper limit of the main vacuum tank, the auxiliary vacuum tank sucks the sewage in the main vacuum tank, and the sewage is pumped into the sewage treatment system through the auxiliary vacuum tank sewage pump.

[0004] This solution still requires the use of a sewage pump, which will increase the complexity and failure rate of the equipment because the maintenance and management of sewage pumps are more difficult than vacuum pumps. In addition, since multiple devices need to be operated at the same time, the complexity of the control system is still high, which may increase the failure rate of the equipment. Secondly, since more devices are used, the energy consumption of the equipment will also increase. Therefore, how to further simplify the equipment, reduce the failure rate and energy consumption while ensuring the normal operation of the negative pressure station is an urgent problem to be solved in the current negative pressure drainage technology.

[0005] Therefore, a new technical solution is needed to solve the above technical problems. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a negative pressure station which can complete the two operations of vacuuming and draining water with one vacuum pump, simplify the equipment structure, reduce the equipment cost, reduce the equipment failure rate and reduce the energy consumption.

[0007] In order to solve the above technical problems, the utility model provides a negative pressure station, including a vacuum tank connected to a negative pressure collection well, and a vacuum pump, there are two vacuum pumps: vacuum pump A and vacuum pump B; vacuum pump A is equipped with vacuum tank A, and vacuum pump B is equipped with vacuum tank B; each vacuum tank is assembled from a bottom cover, a top cover and a shell, and the top cover is provided with an exhaust port and an exhaust port; the air intake port of the vacuum pump A and the air intake port of the vacuum tank A are connected through an electric valve II; the air supply port of the vacuum pump A and the exhaust port of the vacuum tank B are connected through electric valves IV and electric valves I; the air intake port of the vacuum pump B is connected to the air intake port of the vacuum tank B through an electric valve VI; the air supply port of the vacuum pump B and the exhaust port of the vacuum tank A are connected through electric valves VII, electric valves IV and electric valves III.

[0008] By adopting the above technical solution, vacuum pump A is connected to vacuum tank A and vacuum tank B through two electric valves, and vacuum pump B is connected to vacuum tank A and vacuum tank B through another two electric valves. The inlet and outlet pipelines of the vacuum pump are switched by the electric valves, so that the two operations of "vacuuming" and "draining" can be completed with one vacuum pump, thereby reducing the number of equipment and simplifying the control system. Compared with the prior art, this technical solution does not need to use a sewage pump, thereby avoiding the increased equipment complexity and failure rate due to the use of a sewage pump, and also reducing energy consumption.

[0009] Preferably, pressure sensors are provided in both vacuum tank A and vacuum tank B.

[0010] By adopting the above technical solution, the pressure in the vacuum tank is monitored in real time through the pressure sensor to ensure that the vacuum tank is within the normal working range.

[0011] Preferably, the pipeline of the air delivery port of the vacuum pump A is connected with electric valve III and electric valve IV in parallel.

[0012] Preferably, the electric valve III is arranged on the pipeline between the air supply port of the vacuum pump A and the exhaust port of the vacuum tank A.

[0013] By adopting the above technical solution and optimizing the inlet and outlet piping systems of the vacuum pump, the operation of the negative pressure station becomes more efficient, sewage can be discharged to a designated location more quickly, and work efficiency is improved.

[0014] Preferably, the electric valve IV is connected to the electric valve I and the electric valve VII which are connected in parallel, and the electric valve VII is connected to the air supply port of the vacuum pump B.

[0015] Preferably, the electric valves I and V connected in series are connected in parallel to the electric valve II.

[0016] Preferably, the electric valve I and the electric valve V connected in series are connected in parallel with the electric valve VI.

[0017] By adopting the above technical solution, the connection state between the air supply port of the vacuum pump and the vacuum tank is changed by switching the electric valve, so that water can be introduced while pumping water, and continuous and uninterrupted pumping is achieved, which reduces the operating time and improves the operating efficiency.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] 1. When the utility model is working, the inlet and outlet pipelines of the vacuum pump are switched by the electric valve, so that the two operations of "vacuuming" and "draining" can be completed with one vacuum pump, which greatly simplifies the equipment structure, reduces the equipment cost, reduces the equipment failure rate, improves the stability and reliability of the equipment operation, and reduces the difficulty of maintenance and management. The sewage pump is no longer used, so the energy consumption of the equipment is also reduced accordingly.

[0020] 2. The utility model optimizes the inlet and outlet piping systems of the vacuum pump, making the operation of the negative pressure station more efficient, enabling sewage to be discharged to a designated location more quickly, thereby improving work efficiency.

[0021] 3. The utility model changes the connection state between the air delivery port of the vacuum pump and the vacuum tank by switching the electric valve, thereby achieving water intake while pumping water, realizing continuous and uninterrupted water pumping, reducing the operating time and improving the operating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the utility model.

[0023] Figure 2 This is a schematic diagram of the connection between the vacuum pump A and the vacuum tank A of the utility model.

[0024] Figure 3 This is a schematic diagram of the connection between the vacuum pump B and the vacuum tank B of the utility model.

[0025] Figure 4 This is a schematic diagram of the connection between the suction port of vacuum pump A and the suction port of vacuum pump B of the utility model.

[0026] In the figure, 1. vacuum tank A, 2. suction port, 3. shell, 4. discharge port, 5. air intake port, 6. air supply port, 7. electric valve III, 8. electric valve II, 9. air suction port, 10. exhaust port, 11. vacuum tank B, 12. vacuum pump A, 13. delivery pipe, 14. negative pressure pipe network, 15. electric valve I, 16. electric valve IV, 17. electric valve V, 18. electric valve VI, 19. vacuum pump B, 20. positive pressure pipeline, 21. electric valve XI, 22. electric valve IX, 23. electric valve X, 24. electric valve XII, 25. electric valve I, 26. electric valve VII. DETAILED DESCRIPTION

[0027] like Figure 1As shown, the negative pressure station includes a vacuum tank connected to the negative pressure collection well, and a vacuum pump. There are two vacuum pumps: vacuum pump A12 and vacuum pump B19; there are two vacuum tanks: vacuum tank A1 and vacuum tank B11; vacuum pump A12 is equipped with vacuum tank A1, and vacuum pump B19 is equipped with vacuum tank B11; each vacuum tank is assembled from a bottom cover, a top cover and a shell 3; the top cover is provided with a suction port 9 and an exhaust port 10, the top of the shell 3 is provided with a suction port 2, and the bottom of the shell 3 is provided with an exhaust port 4. Figure 2 As shown, an electric valve II8 is provided on the pipeline between the air inlet 5 of the vacuum pump A12 and the air outlet 9 of the vacuum tank A1; the air delivery port 6 of the vacuum pump A12 and the exhaust port 10 of the vacuum tank B11 are connected through the electric valve IV16 and the electric valve I25. Figure 3 As shown, the air intake port of the vacuum pump B19 is connected to the air extraction port 9 of the vacuum tank B11 through the electric valve VI18; the air delivery port of the vacuum pump B19 is connected to the exhaust port of the vacuum tank A1 through the electric valve VII26, the electric valve IV16, and the electric valve III7. The vacuum pump A12 of the present application is connected to the vacuum tank A1 and the vacuum tank B11 through two electric valves, and the vacuum pump B19 is connected to the vacuum tank A1 and the vacuum tank B11 through another two electric valves. When working, the inlet and outlet pipelines of the vacuum pump are switched through the electric valve, so that the two operations of "vacuuming" and "draining" can be completed with one vacuum pump, thereby reducing the number of equipment and simplifying the control system. Compared with the prior art, the present technical solution does not need to use a sewage pump, thereby avoiding the increased equipment complexity and failure rate due to the use of a sewage pump. Since the number of equipment used in the present technical solution is small, the equipment cost is reduced, so the complexity of the control system is low, the failure rate of the equipment is correspondingly reduced, and the difficulty of maintenance and management is also reduced. This has significant advantages over the prior art. In addition, the present technical solution does not need to use a sewage pump, so the energy consumption of the equipment is also reduced accordingly. Compared with the prior art, this point has important environmental significance.

[0028] Pressure sensors are provided in both vacuum tanks, which are not shown in the figure. The pressure in the vacuum tanks is monitored in real time through the pressure sensors to ensure that the vacuum tanks are within the normal working range.

[0029] An electric valve III7 is arranged on the pipeline between the air supply port and the exhaust port 10 of the vacuum pump A12. The air supply port of the vacuum pump A12 is provided with electric valve III7 and electric valve IV16 in parallel. By optimizing the inlet and outlet piping system of the vacuum pump, the operation of the negative pressure station is made more efficient, sewage can be discharged to the designated location more quickly, and work efficiency is improved.

[0030] The electric valve IV16 is connected to the electric valve I25 and the electric valve VII26 which are connected in parallel, and the electric valve VII26 is connected to the air supply port of the vacuum pump B19.

[0031] like Figure 4As shown, the electric valve I15 and the electric valve V17 connected in series are connected in parallel to the electric valve II8. The electric valve I15 and the electric valve V17 connected in series are connected in parallel to the electric valve VI18.

[0032] The discharge ports 4 of the two vacuum tanks are connected to the positive pressure pipeline 20 through their respective delivery pipes; the suction ports 2 of the two vacuum tanks are connected to the negative pressure collection well through their respective negative pressure pipe networks. An electric valve IX 22 is provided on the delivery pipe between the vacuum tank A1 and the positive pressure pipeline 20, and an electric valve X23 is provided on the delivery pipe 13 between the vacuum tank B11 and the positive pressure pipeline 20. An electric valve XII 24 is provided on the negative pressure pipe network 14 between the vacuum tank A1 and the negative pressure collection well, and an electric valve XI 21 is provided on the negative pressure pipe network between the vacuum tank B11 and the negative pressure collection well. By switching the electric valve to change the connection state between the air delivery port of the vacuum pump and the vacuum tank, water can be introduced while pumping water, and continuous and uninterrupted water pumping is achieved, which reduces the operating time and improves the operating efficiency.

[0033] The operating logic is as follows:

[0034] 1. Operation logic of vacuum pump A

[0035] 1.1 The pumping logic of vacuum tank A and the opening and closing of the electric valve:

[0036] Opening and closing conditions of electric valve:

[0037] V-12 is on, V-11 is off, V-02 is on, V-01 is off, V-03 is off, V-13, V-04, V-10 are on, V-07, V-08, V-05, V-06, V-09 are off.

[0038] Pumping logic of vacuum tank A:

[0039] The suction port of vacuum pump A extracts the gas in vacuum tank A through the pipe network of V-02. At this time, vacuum tank A forms a negative pressure environment and extracts the sewage in the front negative pressure pipe network. The exhaust port of vacuum pump A is discharged into vacuum tank B through the pipe network of V-04. At this time, vacuum tank B forms a positive pressure environment, and the sewage with a high liquid level in vacuum tank B is emptied under the positive pressure.

[0040] 1.2 After vacuum tank A reaches the high liquid level and vacuum tank B is emptied of sewage, pressure relief operation is performed:

[0041] Vacuum pump A stops running, V-03, V-04, V-13, V-07, and V-08 are opened, and the pressure is released to vacuum tank A. The pressure of vacuum tank B is 0 MPa.

[0042] 1.3 The drainage logic of vacuum tank A and the opening and closing of the electric valve:

[0043] Opening and closing conditions of electric valve:

[0044] V-01, V-02, V-05 open, V-12 closed, V-11 open, V-06 closed, V-03 open, V-04 closed, V-09 open, V-10 closed, V, V-07, V-08 closed

[0045] Drainage logic of vacuum tank A:

[0046] When vacuum pump A is working, the vacuum pump A12's exhaust port is connected to the lines of V-02, V-01, and V-05 to exhaust the vacuum tank B11, which forms a negative pressure environment in the vacuum tank B11 and forms a negative pressure suction effect on the front pipe network. The exhaust port of vacuum pump A12 is connected to the vacuum tank A1 through the line of V-03, which forms a positive pressure environment in the vacuum tank A1. The sewage with a high liquid level in the vacuum tank A1 is discharged under the positive pressure.

[0047] 2. Operation logic of vacuum pump B

[0048] 2.1 The pumping logic of vacuum tank A and the opening and closing of the electric valve:

[0049] Opening and closing conditions of electric valve:

[0050] V-01, V-05, V-06 are on, V-02 is closed, V-13, V-07 are on, V-08, V-04, V-03 are closed, V-09 is closed, V-10 is on, V-12 is on, V-11 is closed.

[0051] Pumping logic of vacuum tank A:

[0052] The suction port of vacuum pump B19 is connected to vacuum tank A1 along V-06, V-05, and V-01 to extract the gas in vacuum tank A1. At this time, vacuum tank A1 forms a negative pressure environment and extracts the sewage in the front negative pressure pipe network. The exhaust port of vacuum pump B19 is discharged into vacuum tank B11 through the pipe network of V-07. At this time, vacuum tank B11 forms a positive pressure environment, and the sewage with a high liquid level in vacuum tank B11 is emptied under the positive pressure.

[0053] 2.2 After vacuum tank A reaches the high liquid level and vacuum tank B is emptied of sewage, pressure relief operation is performed:

[0054] The vacuum pump B19 stops running, V-03, V-04, V-07, and V-08 are opened, and the pressure relief operation is performed to release the pressure to the vacuum tank A1. The pressure of the vacuum tank B11 is 0 MPa.

[0055] 2.3 The drainage logic of vacuum tank A and the opening and closing of the electric valve:

[0056] Opening and closing conditions of electric valve:

[0057] V-06, V-07, V-04, V-03, V-09, V-11 are turned on;

[0058] V-12, V-10, V-01, V-05, V-02, V-13, V-08 are closed.

[0059] Drainage logic of vacuum tank A:

[0060] When vacuum pump B19 is working, the air outlet of vacuum pump B19 is connected to vacuum tank B11 along the line of V-06 to extract the gas in vacuum tank B11. At this time, vacuum tank B11 forms a negative pressure environment and extracts the sewage in the front negative pressure pipe network. The exhaust port of vacuum pump B19 is discharged into vacuum tank A1 through the lines of V-07, V-04, and V03. At this time, vacuum tank A1 forms a positive pressure environment, and the sewage with a high liquid level in vacuum tank A1 is emptied under the positive pressure.

[0061] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments. Without departing from the principles, the embodiments of the present invention may be deformed or modified in any way.

Claims

1. A negative pressure station, comprising a vacuum tank connected to a negative pressure collection well, and a vacuum pump, characterized in that: There are two vacuum pumps: vacuum pump A (12) and vacuum pump B (19). Vacuum pump A (12) is equipped with vacuum tank A (1), and vacuum pump B (19) is equipped with vacuum tank B (11). Each vacuum tank is assembled from a bottom cover, a top cover and a shell (3). The top cover is provided with an air suction port (9) and an air exhaust port (10). The air suction port of the vacuum pump A (12) and the air suction port of the vacuum tank A (1) are connected via an electric valve II (8). The air supply port (6) of the vacuum pump A (12) is connected to the exhaust port of the vacuum tank B (11) via the electric valve IV (16) and the electric valve I (25); the air intake port of the vacuum pump B (19) is connected to the exhaust port of the vacuum tank B (11) via the electric valve VI (18); the air supply port of the vacuum pump B (19) is connected to the exhaust port of the vacuum tank A (1) via the electric valve VII (26), the electric valve IV (16) and the electric valve III (7).

2. The negative pressure station according to claim 1, characterized in that: Pressure sensors are provided in both the vacuum tank A (1) and the vacuum tank B (11).

3. The negative pressure station according to claim 1, characterized in that: The pipeline of the air delivery port of the vacuum pump A (12) is connected to an electric valve III (7) and an electric valve IV (16) in parallel.

4. The negative pressure station according to claim 3, characterized in that: The electric valve III (7) is arranged on a pipeline between the air supply port of the vacuum pump A (12) and the exhaust port of the vacuum tank A (1).

5. The negative pressure station according to claim 3, characterized in that: The electric valve IV (16) is connected to the electric valve I (25) and the electric valve VII (26) which are connected in parallel, and the electric valve VII (26) is connected to the air supply port of the vacuum pump B (19).

6. The negative pressure station according to claim 1, characterized in that: The electric valve II (8) is connected in parallel to an electric valve I (15) and an electric valve V (17) which are connected in series.

7. The negative pressure station according to claim 6, characterized in that: The series-connected electric valve I (15), electric valve V (17) and electric valve VI (18) are connected in parallel.

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