Vacuum negative pressure drainage system

Abstract

The utility model discloses a vacuum negative pressure drainage system, which relates to the technical field of vacuum negative pressure drainage and comprises a base, a support is fixedly connected to the upper end of the base, a vacuum tank is fixedly connected to the upper end of the support, and a connecting pipe is fixedly connected to one side, far away from the support, of the outer surface of the vacuum tank. The other end of the connecting pipe is fixedly connected with a centrifugal separator which is fixedly installed at the upper end of the base, an exhaust port of the centrifugal separator is fixedly connected with a vacuum pipe, the other end of the vacuum pipe is fixedly connected with a vacuum pump which is fixedly installed at the upper end of the base, and the lower end of the centrifugal separator is fixedly connected with a drainage pipe. Air extracted from the vacuum tank is separated in advance through the centrifugal separator, and the vacuum pump is connected with the exhaust port of the centrifugal separator through the vacuum pipe, so that the possibility that water vapor enters the vacuum pump is reduced, the influence of the water vapor on the performance of the vacuum pump is reduced, and the service life of the vacuum pump is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum negative pressure drainage, in particular to a vacuum negative pressure drainage system. Background Art

[0002] The vacuum drainage system is a beneficial supplement to the gravity drainage system. It is a new type of drainage system that is different from the gravity drainage system. It uses vacuum equipment to create a certain vacuum degree in the pipe and uses air as the conveying medium to achieve sewage collection.

[0003] When the existing vacuum drainage system is in use, as the water stored in the vacuum tank increases, the air in the tank will also become humid, and the generated water vapor will easily enter the interior of the vacuum pump, causing the performance of the pump to decline, thereby affecting its negative pressure maintenance ability. At the same time, when performing drainage operations, the vacuum tank needs to be pressurized so that the pressure inside the vacuum tank is gradually balanced with the external environmental pressure, so that the accumulated water can be discharged smoothly. However, after the sewage is discharged, the vacuum tank needs to be put into a negative pressure state again through the vacuum pump. Frequent pressure increase and pressure reduction operations will increase the load of the vacuum pump, thereby reducing the service life of the vacuum pump. For this reason, a vacuum negative pressure drainage system is proposed to solve the above-mentioned problems. Utility Model Content

[0004] In order to solve the above technical problems, a vacuum negative pressure drainage system is provided. The technical solution solves the problem that when the existing vacuum drainage system proposed in the above background technology is in use, as the water stored in the vacuum tank increases, the air in the tank will also become humid, and the generated water vapor will easily enter the interior of the vacuum pump, causing the performance of the pump to decline, thereby affecting its negative pressure maintenance ability. At the same time, when performing drainage operations, it is necessary to increase the pressure of the vacuum tank so that the pressure inside the vacuum tank is gradually balanced with the external environmental pressure, so that the accumulated water can be discharged smoothly. However, after the sewage is discharged, the vacuum tank needs to be put into a negative pressure state again through the vacuum pump. Frequent pressure increase and pressure reduction operations will increase the load of the vacuum pump, thereby reducing the service life of the vacuum pump.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A vacuum negative pressure drainage system includes a base. A support is fixedly connected to the upper end of the base. A vacuum tank is fixedly connected to the upper end of the support. A connecting pipe is fixedly connected to one side of the outer surface of the vacuum tank away from the support. The other end of the connecting pipe is fixedly connected to a centrifugal separator. The centrifugal separator is fixedly installed at the upper end of the base. A vacuum pipe is fixedly connected to the exhaust port of the centrifugal separator. The other end of the vacuum pipe is fixedly connected to a vacuum pump. The vacuum pump is fixedly installed at the upper end of the base. A drain pipe is fixedly connected to the lower end of the centrifugal separator. An electromagnetic valve is arranged on the drain pipe. A plurality of support frames are fixedly connected to the inner side of the support at the lower end of the vacuum tank. A water collection tank is fixedly connected to the inner side of the support frame. Two water inlet pipes are fixedly connected to the upper end of the water collection tank. The other ends of the water inlet pipes are fixedly connected to the outer surface of the vacuum tank.

[0007] Preferably, a partition plate is fixedly connected to the inside of the water collection tank. The partition plate divides the inside of the water collection tank into upper and lower cavities. A push plate is slidably connected to the inside of the upper cavity. One end of the push plate is fixedly connected to a connecting rod. A plurality of sealing plugs are fixedly connected to the outer surface of the connecting rod.

[0008] Preferably, the sealing plugs are made of an elastic material. The outer surface of the sealing plugs fits with the inner wall of the water collection tank and the upper surface of the partition plate.

[0009] Preferably, three water leakage holes are fixedly and penetratingly formed in the upper end of the partition plate. A cylinder for driving the push plate to move is fixedly installed at the left end of the water collection tank.

[0010] Preferably, two sewage pipes are fixedly connected to the lower end of the water collection tank. An electromagnetic valve is arranged on the sewage pipes. The other ends of the sewage pipes are fixedly connected to a water pump. The water pump is fixedly installed at the upper end of the base. The output end of the water pump is fixedly connected to a delivery pipe. An electromagnetic valve is arranged on the delivery pipe.

[0011] Preferably, a liquid level sensor is arranged inside the vacuum tank.

[0012] Preferably, a suction pipe is arranged on one side of the outer surface of the vacuum tank away from the support.

[0013] The beneficial effects of the present utility model compared with the prior art are as follows:

[0014] This solution proposes a vacuum negative pressure drainage system. By arranging a centrifugal separator to pre-separate the air extracted from the vacuum tank, the water vapor and dry gas in the air will be discharged from the drain pipe at the lower end and the exhaust port at the upper end of the centrifugal separator respectively. The vacuum pump is connected to the exhaust port of the centrifugal separator through a vacuum pipe, thereby reducing the possibility of water vapor entering the inside of the vacuum pump and reducing the influence of water vapor on the performance of the vacuum pump, so as to extend the service life of the vacuum pump.

[0015] In this solution, a water collecting tank and a partition board are provided. The partition board divides the interior of the water collecting tank into upper and lower cavities. During drainage, the push plate is periodically reciprocally pulled by the cylinder to move, so that the sewage in the vacuum tank leaks into the space between two adjacent sealing plugs in the upper cavity along the water inlet pipe. During the movement of two adjacent sealing plugs, the sewage is sent to the water leakage holes and then falls into the lower cavity, and is discharged through the sewage discharge pipe at the lower end of the water collecting tank. The reasonable arrangement spacing of the sealing plugs can keep the two cavities in an unconnected state all the time. The water collecting tank plays a role in pressure transition during the drainage process, thereby reducing the boosting operation of the vacuum tank, reducing the load of the vacuum pump, and helping to extend the service life of the vacuum pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present utility model;

[0017] Figure 2 is a schematic structural diagram of the present utility model from another perspective;

[0018] Figure 3 is a schematic structural diagram of the water collecting tank in the present utility model;

[0019] Figure 4 is a schematic structural diagram of the liquid level sensor in the present utility model.

[0020] The reference numerals in the figures are:

[0021] 1, base; 2, bracket; 3, vacuum tank; 4, connecting pipe; 5, centrifugal separator; 6, vacuum pipe; 7, vacuum pump; 8, drain pipe; 9, support frame; 10, water collecting tank; 11, water inlet pipe; 12, partition board; 13, water leakage hole; 14, push plate; 15, connecting rod; 16, sealing plug; 17, cylinder; 18, sewage discharge pipe; 19, water pump; 20, conveying pipe; 21, liquid level sensor; 22, suction pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following description is used to disclose the present utility model so that those skilled in the art can implement the present utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations.

[0023] Refer to Figures 1-3As shown in the figure, a vacuum negative pressure drainage system includes a base 1. A bracket 2 is fixedly connected to the upper end of the base 1. A vacuum tank 3 is fixedly connected to the upper end of the bracket 2. A connecting pipe 4 is fixedly connected to one side of the outer surface of the vacuum tank 3 away from the bracket 2. The other end of the connecting pipe 4 is fixedly connected to a centrifugal separator 5. The centrifugal separator 5 is fixedly installed at the upper end of the base 1. A vacuum pipe 6 is fixedly connected to the exhaust port of the centrifugal separator 5. The other end of the vacuum pipe 6 is fixedly connected to a vacuum pump 7. The vacuum pump 7 is fixedly installed at the upper end of the base 1. A drain pipe 8 is fixedly connected to the lower end of the centrifugal separator 5. An electromagnetic valve is provided on the drain pipe 8. Inside the bracket 2 and at the lower end of the vacuum tank 3, several support frames 9 are fixedly connected. A water collection tank 10 is fixedly connected to the inside of the support frames 9. Two water inlet pipes 11 are fixedly connected to the upper end of the water collection tank 10. The other ends of the water inlet pipes 11 are fixedly connected to the outer surface of the vacuum tank 3.

[0024] Further, after the gas inside the vacuum tank 3 enters the centrifugal separator 5, the water vapor and air will be separated under the action of the centrifugal barrel inside the centrifugal separator 5. The separated air is pumped away by the vacuum pump 7, and the water vapor settles at the bottom of the centrifugal separator 5 and is discharged through the drain pipe 8, which can ensure that the operation of the vacuum pipe 6 and the vacuum pump 7 is not interfered by water vapor, helps to extend the service life of the vacuum pump 7 and reduce the maintenance frequency.

[0025] Further, a partition plate 12 is fixedly connected to the inside of the water collection tank 10. The partition plate 12 divides the inside of the water collection tank 10 into upper and lower two cavities. A push plate 14 is slidably connected to the inside of the upper cavity. One end of the push plate 14 is fixedly connected to a connecting rod 15. Several sealing plugs 16 are fixedly connected to the outer surface of the connecting rod 15.

[0026] Further, the sealing plug 16 is made of an elastic material. The outer surface of the sealing plug 16 fits with the inner wall of the water collection tank 10 and the upper surface of the partition plate 12. The sealing plug 16 can maintain the sealing effect while sliding.

[0027] Further, three water leakage holes 13 are fixedly penetrated and opened at the upper end of the partition plate 12. A cylinder 17 for driving the push plate 14 to move is fixedly installed at the left end of the water collection tank 10.

[0028] Further, two sewage pipes 18 are fixedly connected to the lower end of the water collection tank 10. An electromagnetic valve is provided on the sewage pipe 18. The other end of the sewage pipe 18 is fixedly connected to a water pump 19. The water pump 19 is fixedly installed at the upper end of the base 1. The output end of the water pump 19 is fixedly connected to a delivery pipe 20. An electromagnetic valve is provided on the delivery pipe 20.

[0029] Furthermore, when draining water, the cylinder 17 periodically pulls the push plate 14 back and forth to move, which can drive the sealing plug 16 to move. During the movement of the sealing plug 16, the sewage in the vacuum tank 3 will leak into between two adjacent sealing plugs 16 along the water inlet pipe 11. The two adjacent sealing plugs 16 will continue to move and send the sewage to the leakage hole 13, so that it falls into the lower end cavity of the water collecting tank 10, and then is discharged through the sewage pipe 18 at the lower end of the water collecting tank 10.

[0030] Furthermore, the spacing between two adjacent sealing plugs 16 is reasonably set, which can ensure that the two cavities of the water collecting box 10 are always in a non-connected state, thereby reducing the pressure leakage inside the vacuum tank 3.

[0031] Reference Figure 1 and Figure 4 As shown, a liquid level sensor 21 is provided inside the vacuum tank 3. The liquid level sensor 21 is electrically connected to an external control device. The liquid level sensor 21 consists of a laser transmitter and a receiver. The liquid level is calculated by irradiating the liquid surface with a laser beam and measuring the interval time of the reflected light. The liquid level inside the vacuum tank 3 can be monitored in real time through the liquid level sensor 21. When the liquid level reaches a certain height, the liquid level sensor 21 will send an electrical signal to the external control device, and the cylinder 17 will be started by the control device to drain water.

[0032] Furthermore, a suction pipe 22 is disposed on the outer surface of the vacuum tank 3 away from the bracket 2 , and the suction pipe 22 is used to extract sewage.

[0033] Working principle: When in use, connect the suction pipe 22 to the sewage discharge interface, and extract the air inside the vacuum tank 3 through the vacuum pump 7, so that the inside of the vacuum tank 3 is in a negative pressure state, thereby sucking the sewage into the vacuum tank 3. When the vacuum pump 7 extracts the air inside the vacuum tank 3, the centrifugal separator 5 will separate the water vapor in the air in advance to prevent it from entering the vacuum pump 7, which helps to extend the service life of the vacuum pump 7. When the liquid level inside the vacuum tank 3 reaches a certain height, the liquid level sensor 21 will send an electrical signal to the external control device, which will start the cylinder 17 for drainage through the control device. Driven by the cylinder 17, the push plate 14 drives the sealing plug 16 to move back and forth periodically. During the movement of the sealing plug 16, the sewage in the vacuum tank 3 will leak into between two adjacent sealing plugs 16 along the water inlet pipe 11. The two adjacent sealing plugs 16 will continue to move and send the sewage to the leakage hole 13, so that it falls into the lower end cavity of the water collecting tank 10, and then is discharged through the sewage pipe 18 at the lower end of the water collecting tank 10. During the whole process, the two cavities of the water collecting tank 10 are always in an unconnected state, which can reduce the pressure leakage of the vacuum tank 3, so that the vacuum pump 7 does not need to perform frequent pressure increase and pressure reduction operations, thereby extending the service life of the vacuum pump 7.

[0034] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments, and what is described in the above embodiments and the specification is only the principle of the present utility model. Without departing from the spirit and scope of the present utility model, various changes and improvements will occur to the present utility model, and all these changes and improvements fall within the scope of the present utility model claimed. The scope of protection required by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A vacuum negative pressure drainage system, characterized in that, It includes a base (1). The upper end of the base (1) is fixedly connected to a support (2). The upper end of the support (2) is fixedly connected to a vacuum tank (3). On one side of the outer surface of the vacuum tank (3) away from the support (2), a connecting pipe (4) is fixedly connected. The other end of the connecting pipe (4) is fixedly connected to a centrifugal separator (5). The centrifugal separator (5) is fixedly installed at the upper end of the base (1). At the exhaust port of the centrifugal separator (5), a vacuum pipe (6) is fixedly connected. The other end of the vacuum pipe (6) is fixedly connected to a vacuum pump (7). The vacuum pump (7) is fixedly installed at the upper end of the base (1). The lower end of the centrifugal separator (5) is fixedly connected to a drain pipe (8). An electromagnetic valve is provided on the drain pipe (8). Inside the support (2) and at the lower end of the vacuum tank (3), a plurality of support frames (9) are fixedly connected. Inside the support frames (9), a water collection tank (10) is fixedly connected. At the upper end of the water collection tank (10), two water inlet pipes (11) are fixedly connected. The other ends of the water inlet pipes (11) are fixedly connected to the outer surface of the vacuum tank (3).

2. The vacuum negative pressure drainage system according to claim 1, wherein: Inside the water collection tank (10), a partition plate (12) is fixedly connected. The partition plate (12) divides the interior of the water collection tank (10) into upper and lower cavities. Inside the upper cavity, a push plate (14) is slidably connected. One end of the push plate (14) is fixedly connected to a connecting rod (15). On the outer surface of the connecting rod (15), a plurality of sealing plugs (16) are fixedly connected.

3. The vacuum negative pressure drainage system according to claim 2, wherein: The sealing plugs (16) are made of an elastic material. The outer surface of the sealing plugs (16) fits with the inner wall of the water collection tank (10) and the upper surface of the partition plate (12).

4. A vacuum negative pressure drainage system according to claim 2, characterized in that: At the upper end of the partition plate (12), three water leakage holes (13) are fixedly and penetratingly opened. At the left end of the water collection tank (10), a cylinder (17) for driving the push plate (14) to move is fixedly installed.

5. A vacuum negative pressure drainage system according to claim 1, characterized in that: At the lower end of the water collection tank (10), two sewage pipes (18) are fixedly connected. An electromagnetic valve is provided on the sewage pipes (18). The other ends of the sewage pipes (18) are fixedly connected to a sewage pump (19). The sewage pump (19) is fixedly installed at the upper end of the base (1). The output end of the sewage pump (19) is fixedly connected to a delivery pipe (20). An electromagnetic valve is provided on the delivery pipe (20).

6. The vacuum negative pressure drainage system according to claim 1, characterized in that: Inside the vacuum tank (3), a liquid level sensor (21) is provided.

7. A vacuum negative pressure drainage system according to claim 1, characterized in that: On one side of the outer surface of the vacuum tank (3) away from the support (2), a suction pipe (22) is provided.

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