A centrifugal pump vacuum water diversion device for mine drainage in high stress environment

Abstract

The utility model belongs to the technical field of water pumps, and specifically discloses a centrifugal pump vacuum water diversion device for mine drainage in a high-stress environment. The vacuum water diversion tank of the device is a closed tank body and is provided with a water outlet I connected to the water inlet II of the water pump at the bottom. The upper part of the vacuum water diversion tank is provided with a water suction pipe with one end extending to the lower part of the water tank; the top of the vacuum water diversion tank is provided with a water injection port connected to the water supply pipe, and the water supply pipe is provided with an airtight control valve, and the vacuum water diversion tank is provided with an overflow port with an exhaust valve; the water outlet II of the water pump is connected to the main drainage pipe, and the main drainage pipe is connected in series with a check valve and a control valve. The utility model connects a check valve and a control valve in series to the main drainage pipe connected to the water outlet II of the water pump, and arranges a water supply pipe and an overflow port at the top of the vacuum water diversion tank, so that the bottom valve can be replaced to realize continuous water diversion without stopping the pump, so that the drainage system can operate stably, and to a certain extent, it can extend the service life of the water pump, and has the characteristics of simple structure, small maintenance, stable operation, and energy saving.

Description

Technical Field

[0001] The utility model relates to the technical field of water pumps, in particular to a centrifugal pump vacuum water diversion device which has simple structure, small maintenance, stable operation and energy saving and is used for mine drainage in a high stress environment. Background Art

[0002] In mining projects, centrifugal pumps are often used for drainage. Before the centrifugal pump is used for drainage, the pump casing must be filled with water to ensure that the vacuum degree at the inlet can meet the requirements when the impeller rotates at high speed, so that the water in the reservoir can be sucked into the impeller through the water suction port of the water pump under the action of atmospheric pressure, and then flow out of the water outlet of the water pump under the action of centrifugal force, completing the drainage work through the conversion of water pressure energy, potential energy and kinetic energy.

[0003] At present, there are two types of water diversion methods for centrifugal pumps: self-priming and non-self-priming. Among them, self-priming water diversion uses the centrifugal pump to generate vacuum to achieve the characteristic of water absorption for water diversion, but the efficiency of self-priming centrifugal pumps is low, and it is easily restricted by the pump room environment and geographical location (for example, in the mine under high stress environment, due to high ground pressure, intense high stress activities, and relatively broken rock mass, it is more difficult to open tunnels in mines under such high stress environment and the pump room space is limited). This requires the use of water diversion devices or equipment to fill water into the pump casing or to suck water into the pump body from the suction pipe to complete the water diversion process of the water pump to ensure the normal start-up of the water pump. Non-self-priming centrifugal pumps usually install a bottom valve on the suction pipe to supply water to the centrifugal pump to ensure the continuous operation of the centrifugal pump. However, installing a bottom valve for water diversion will bring the following disadvantages:

[0004] 1. Reduced drainage efficiency. Using the bottom valve to divert water will increase excess head loss, causing the actual operating point of the pump to shift to the left (low flow, high head), resulting in the actual operating condition of the pump being lower than the design value, increasing the operating time and reducing the drainage efficiency.

[0005] 2. Troublesome maintenance and overhaul. The rubber pad of the bottom valve is easily damaged during use and needs to be repaired and replaced frequently. Although the above-water bottom valve makes up for the deficiency of the underwater bottom valve that the water tank liquid level needs to be lowered to meet the difficulty of repair and maintenance, once the bottom valve fails, the pump needs to be stopped for overhaul, which affects the production progress. In addition, the use of the bottom valve will be affected by water quality conditions and the length of the suction pipe.

[0006] 3. Shorten the service life. The use of the foot valve will increase the negative pressure at the water inlet of the water pump, affect the anti-cavitation ability of the water pump, and easily damage the impeller, thus shortening the service life of the water pump.

[0007] In addition, non-self-priming water diversion devices include water ejectors, water diversion cylinders, water ring vacuum pumps, etc. Among them, the water ejector water diversion device has a compact structure and is simple to manufacture, but has low efficiency and requires a large amount of pressurized water, resulting in a long water diversion time. It is only suitable for general pumping requirements. The water diversion cylinder has a simple structure and a large volume, and requires manual operation every time it is started. However, it is not suitable when the water level is too low and the water inlet pipe is long, and is only suitable for small centrifugal pump water diversion. The vacuum pump water diversion device uses a vacuum water diversion tank to supply water to the centrifugal pump to ensure that the non-self-priming centrifugal pump can achieve negative pressure pumping and transportation at a higher working efficiency. In the prior art, the vacuum pump water diversion device is usually equipped with a branch pipe and a valve at the outlet end of the water pump, and the vacuum water diversion tank is self-replenished with water by controlling the valve and the branch pipe; however, when the non-self-priming centrifugal pump is restarted after being stopped for a long time, the vacuum degree of the vacuum water diversion tank is easily destroyed due to poor sealing, etc., resulting in a "vacuum" situation, that is, the vacuum water diversion tank cannot form a sufficient vacuum degree and cannot suck water from the outside, resulting in the need to re-replenish the vacuum water diversion tank with water from an external water source, which not only reduces the stability of operation, but also makes the startup process long and the operation is also cumbersome. Utility Model Content

[0008] In view of the deficiencies in the prior art, the utility model provides a centrifugal pump vacuum water diversion device for mine drainage in a high-stress environment, which has a simple structure, small maintenance amount, stable operation and energy saving.

[0009] The utility model is implemented as follows: it comprises a vacuum water diversion tank, a water pump, and a water tank, wherein the vacuum water diversion tank is a closed tank body and is provided with a water outlet I at the bottom thereof which is connected with a water inlet II of the water pump, the vacuum water diversion tank is fixedly arranged beside the water tank, and a water inlet I is provided at the top of the vacuum water diversion tank, and the water inlet I is connected with a water suction pipe having one end extending to the bottom of the water tank;

[0010] A water inlet connected to a water supply pipe is arranged on the top of the vacuum water diversion tank, an airtightness control valve is arranged on the water supply pipe, an overflow port is arranged on the top or upper part of the vacuum water diversion tank, and an exhaust valve with an outlet end lower than the water inlet is arranged on the overflow port; the water outlet II of the water pump is connected to a main drain pipe, and a check valve and a control valve are connected in series on the main drain pipe.

[0011] Furthermore, a liquid level observation window is provided on the side wall of the vacuum water diversion tank and / or a liquid level monitoring device is provided inside, and the water outlet I is lower than the lower end of the liquid level observation window.

[0012] Furthermore, a filter unit is detachably fixedly provided on the port where the water suction pipe extends to the lower part of the water tank.

[0013] Furthermore, the filtration unit includes an upper fixed plate, a filter screen I, and a lower fixed plate. The upper fixed plate is fixedly connected to the lower port of the water suction pipe. The upper fixed plate is penetrated by a through hole connected to the water suction pipe. The lower fixed plate is arranged parallel to the upper fixed plate and spaced apart. The filter screen I is fixedly arranged circumferentially on the outer edge between the upper fixed plate and the lower fixed plate.

[0014] Furthermore, a plurality of connecting rods are fixedly arranged at circumferential intervals near the edge between the upper fixing plate and the lower fixing plate, and the filter screen I can be detachably wrapped around the outside of the plurality of connecting rods or attached to the inside of the plurality of connecting rods.

[0015] Furthermore, a filter screen II is fixedly arranged at the water outlet I and / or the water inlet I in the vacuum water diversion tank.

[0016] Furthermore, a conical tank body is provided at the bottom of the vacuum water diversion tank, the water outlet I is higher than the top of the conical tank body, and a sewage outlet is provided at the bottom of the conical tank body.

[0017] Furthermore, a base is fixedly provided below the vacuum water diversion tank, the vacuum water diversion tank is fixedly provided at the upper end of the base, at least one side of the base is provided with a clearance groove extending to the middle, the sewage outlet is provided in the clearance groove, the water outlet I is horizontally provided and the center line is flush with the center line of the water inlet II of the water pump.

[0018] Furthermore, the water inlet II of the water pump is connected to the water outlet I through an eccentric reducer, and the water outlet II of the water pump is connected to the main drain pipe through a flange.

[0019] Furthermore, a water level control line or a water level monitoring device is provided inside the water tank, and the water inlet II of the water pump is 0.2 to 0.3 m lower than the safe water depth in the vacuum water tank.

[0020] Beneficial effects of the utility model:

[0021] 1. Aiming at the characteristics of mine drainage under high stress environment, the utility model connects a check valve and a control valve in series on the main drainage pipe connected to the water outlet II of the water pump, and adds a vacuum water diversion tank, and arranges a water supply pipe and an overflow port with an exhaust valve at the top of the vacuum water diversion tank, and arranges an airtight control valve on the water supply pipe, so that water can be supplied to the vacuum water diversion tank through the water supply pipe to maintain sufficient negative pressure in the tank body, ensuring that the water in the water tank can be pressed into the vacuum water diversion tank through the suction pipe under the action of atmospheric pressure, which can not only replace the bottom valve to realize continuous water diversion that can be turned on and off, but also can quickly start the water pump after being stopped for a long time, thereby ensuring the stable operation of the mine drainage system, and avoiding the "air binding" phenomenon caused by too low liquid level, thereby increasing the service life of the water pump and reducing the maintenance workload.

[0022] 2. The utility model connects a check valve and a control valve in series on the main drainage pipe, an airtight control valve is arranged on the water supply pipe at the top of the vacuum water diversion tank, and an exhaust valve is arranged at the overflow port, and the suction pipe extends to the lower part of the water tank and is sealed through the water surface, thereby significantly improving the sealing of the vacuum water diversion tank, effectively reducing or even avoiding the problem that the vacuum water diversion tank is easily "evacuated" due to poor sealing, improving the working reliability of the vacuum water diversion device, not only ensuring the stability of mine drainage operations, but also reducing the frequency of water replenishment to reduce energy consumption and water resource occupation.

[0023] 3. The utility model is provided with a liquid level observation window on the side wall of the vacuum water diversion tank and / or a liquid level monitoring device on the inner side, so that the water level in the vacuum water diversion tank can be timely grasped, and the air tightness control valve on the water supply pipe can be controlled to avoid the vacuum water diversion tank from being "evacuated", thereby improving the working reliability of the device, and the water level in the tank is too low to cause a large amount of air to enter the water inlet II of the water pump and cause the "air binding" phenomenon.

[0024] 4. The utility model has a filter unit fixedly and detachably arranged on the port of the water suction pipe extending to the lower part of the water tank, which can filter the water in the water tank for the first time, and prevent large particles of mud and sand from entering the vacuum water tank and the water pump, thereby improving the service life of the vacuum water tank and the water pump and reducing the maintenance workload; further, a filter is fixedly arranged at the water outlet I and / or the water inlet I in the vacuum water tank, which can filter the water sucked into the vacuum water tank for the second time and filter the water entering the water pump for the third time, thereby slowing down the accumulation speed of mud and sand in the vacuum water tank and reducing the wear of the water pump, effectively reducing the maintenance workload of the vacuum water tank and improving the service life of the water pump.

[0025] Therefore, the utility model has the characteristics of simple structure, small maintenance, stable operation and energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the utility model;

[0027] Figure 2 for Figure 1 A magnified view of the vacuum water tank;

[0028] Figure 3 for Figure 1 A magnified view of the filter unit;

[0029] Figure 4 for Figure 3 AA section view;

[0030] In the figure: 1-vacuum water diversion tank, 11-water outlet Ⅰ, 12-water filling port, 13-overflow port, 14-liquid level observation window, 15-conical tank body, 16-drainage port, 17-filter screen Ⅱ, 18-water inlet Ⅰ, 2-water pump, 3-water tank, 4-suction pipe, 5-water supply pipe, 6-main drainage pipe, 61-check valve, 62-control valve, 63-flange, 7-base, 8-filter unit, 81-upper fixed plate, 82-filter screen Ⅰ, 83-lower fixed plate, 84-connecting rod, 9-eccentric reducer. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0032] like Figures 1 to 4 As shown, the utility model comprises a vacuum water diversion tank 1, a water pump 2, and a water tank 3. The vacuum water diversion tank 1 is a closed tank body and is provided with a water outlet Ⅰ11 at the bottom thereof, which is connected with a water inlet Ⅱ of the water pump 2. The vacuum water diversion tank 1 is fixedly arranged beside the water tank 3. A water inlet Ⅰ18 is provided at the top of the vacuum water diversion tank 1. The water inlet Ⅰ18 is connected with a water suction pipe 4 having one end extending to the bottom of the water tank 3.

[0033] The top of the vacuum water diversion tank 1 is provided with a water injection port 12 connected to the water supply pipe 5, the water supply pipe 5 is provided with an airtightness control valve, the top or upper part of the vacuum water diversion tank 1 is provided with an overflow port 13, and the overflow port 13 is provided with an exhaust valve whose outlet end is lower than the water injection port 12; the water outlet II of the water pump 2 is connected to the main drainage pipe 6, and the main drainage pipe 6 is connected in series with a check valve 61 and a control valve 62.

[0034] The vacuum water tank 1 is provided with a liquid level observation window 14 on its side wall and / or a liquid level monitoring device on its inner side, and the water outlet I11 is lower than the lower end of the liquid level observation window 14 .

[0035] The water suction pipe 4 is an inverted "L"-shaped pipe and the upper end is connected to the water inlet Ⅰ18. A vertical water suction pipe bracket is arranged on the side of the water tank 3 to form a fixed support for the water suction pipe 4.

[0036] The suction pipe 4 extends to a port at the lower part of the water tank 3 and a filter unit 8 is detachably fixedly provided thereon.

[0037] The filtering unit 8 includes an upper fixed plate 81, a filter screen I 82, and a lower fixed plate 83. The upper fixed plate 81 is fixedly connected to the lower port of the water suction pipe 4. The upper fixed plate 81 is penetrated by a through hole connected to the water suction pipe 4. The lower fixed plate 83 is arranged parallel to the upper fixed plate 81 and spaced apart. The filter screen I 82 is fixedly arranged on the outer edge circumferentially between the upper fixed plate 81 and the lower fixed plate 83.

[0038] A plurality of connecting rods 84 are fixedly arranged at circumferential intervals near the edge between the upper fixing plate 81 and the lower fixing plate 83 , and the filter screen I 82 can be detachably wrapped around the outside of the plurality of connecting rods 84 or attached to the inside of the plurality of connecting rods 84 .

[0039] A filter screen II 17 is fixedly arranged at the water outlet I 11 and / or the water inlet I 18 in the vacuum water tank 1 .

[0040] The bottom of the vacuum water tank 1 is provided with a conical tank body 15, the water outlet I11 is higher than the top of the conical tank body 15, and the bottom of the conical tank body 15 is provided with a sewage outlet 16. The conical tank body 15 is convenient for sedimentation and sedimentation into the vacuum water tank 1, and then it is regularly cleaned through the sewage outlet 16, so as to minimize the sediment from entering the water pump 2 to reduce damage.

[0041] A base 7 is fixedly installed below the vacuum water diversion tank 1, and the vacuum water diversion tank 1 is fixedly installed on the upper end of the base 7. At least one side of the base 7 is provided with a clearance groove extending to the middle, and the sewage outlet 16 is arranged in the clearance groove. The water outlet Ⅰ11 is arranged horizontally and the center line is flush with the center line of the water inlet Ⅱ of the water pump 2.

[0042] The water inlet II of the water pump 2 is connected to the water outlet I 11 through an eccentric reducer 9 , and the water outlet II of the water pump 2 is connected to the main drain pipe 6 through a flange 63 .

[0043] A water level control line or a water level monitoring device is arranged inside the water tank 3, and the water inlet II of the water pump 2 is 0.2-0.3m lower than the safe water depth in the vacuum water tank 1. The water level control lines of "minimum water level", "normal water level" and "maximum water level" are marked on the inner wall of the water tank 3. When the water level of the water tank 3 is between the "minimum water level" and "normal water level" lines, the water pump 2 works normally; when the water level is lower than the "minimum water level" line, the control system of the water pump 2 sends out an alarm to avoid the water pump 2 and the motor from being damaged due to lack of water in the pump casing, and the water pump 2 should stop working; when the water level of the water tank 3 exceeds the "normal water level" line, the control system of the water pump 2 sends out an alarm, and the working and standby water pumps 2 should be started at the same time for drainage; when the water level of the water tank 3 exceeds the "maximum water level" line, the control system of the water pump 2 sends out an alarm, and the control system or the operator immediately takes emergency measures according to the actual situation.

[0044] The working principle and working process of the utility model are as follows:

[0045] like Figures 1 to 4 As shown, underground water and production wastewater in the mine are collected in the water tank 3. Before starting the water pump 2, the airtight control valve on the water supply pipe 5 and the exhaust valve on the overflow port 13 are opened first, and the water supply pipe 5 injects clean water into the vacuum water tank 1 through the water injection port 12. As the water level of the clean water injected into the tank rises, the air in the tank and the pump body is discharged through the exhaust valve on the overflow port 13; when clean water flows out of the exhaust valve on the overflow port 13, the airtight control valve on the water supply pipe 5 and the exhaust valve on the overflow port 13 are closed, and then the water pump 2 is started, and the water pump 2 is waited for a while to work until the pressure in the pump body reaches a certain value, and then the check valve 61 and the control valve 62 are opened, and the water stored in the vacuum water tank 1 is sucked into the water pump 2, and then enters the main drainage pipe 6 through the outlet II of the water pump 2 and is discharged to the surface water treatment station. After the water pump 2 is started, it continuously draws the water stored in the vacuum water tank 1, causing the water level in the tank to drop to a certain negative pressure. Under the action of the external atmospheric pressure, the water stored in the water tank 3 will be continuously pressed into the vacuum water tank 1 through the suction pipe 4 and the water inlet Ⅰ18, thereby ensuring that the water pump 2 continues to operate normally and the entire drainage work is carried out stably.

[0046] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A centrifugal pump vacuum water diversion device for mine drainage in a high-stress environment, comprising a vacuum water diversion tank (1), a water pump (2), and a water tank (3); the vacuum water diversion tank (1) is a closed tank body and is provided with a water outlet I (11) at the bottom thereof, which is connected to a water inlet II of the water pump (2); the vacuum water diversion tank (1) is fixedly arranged beside the water tank (3); a water inlet I (18) is provided at the top of the vacuum water diversion tank (1); the water inlet I (18) is connected to a water suction pipe (4) having one end extending to the bottom of the water tank (3); It is characterized in that The top of the vacuum water diversion tank (1) is provided with a water injection port (12) connected to a water supply pipe (5), the water supply pipe (5) is provided with an airtight control valve, the top or upper portion of the vacuum water diversion tank (1) is provided with an overflow port (13), the overflow port (13) is provided with an exhaust valve whose outlet end is lower than the water injection port (12); the water outlet II of the water pump (2) is connected to a main drainage pipe (6), the main drainage pipe (6) is connected in series with a check valve (61) and a control valve (62).

2. The centrifugal pump vacuum water diversion device for mine drainage under high stress environment according to claim 1, characterized in that: The vacuum water diversion tank (1) is provided with a liquid level observation window (14) on the side wall and / or a liquid level monitoring device is provided inside, and the water outlet I (11) is lower than the lower end of the liquid level observation window (14).

3. The centrifugal pump vacuum water diversion device for mine drainage under high stress environment according to claim 1, characterized in that: The water suction pipe (4) extends to a port at the lower part of the water tank (3) and a filter unit (8) is detachably fixedly provided thereon.

4. The centrifugal pump vacuum water diversion device for mine drainage under high stress environment according to claim 3, characterized in that: The filter unit (8) comprises an upper fixing plate (81), a filter screen I (82), and a lower fixing plate (83); the upper fixing plate (81) is fixedly connected to the lower port of the water suction pipe (4); a through hole communicating with the water suction pipe (4) is provided through the upper fixing plate (81); the lower fixing plate (83) is arranged parallel to the upper fixing plate (81) and spaced apart; and the filter screen I (82) is fixedly provided circumferentially on the outer edge between the upper fixing plate (81) and the lower fixing plate (83).

5. The centrifugal pump vacuum water diversion device for mine drainage in a high stress environment according to claim 4, characterized in that: A plurality of connecting rods (84) are fixedly arranged at circumferential intervals between the upper fixing plate (81) and the lower fixing plate (83) near the edge, and the filter screen I (82) is detachably wrapped around the outside of the plurality of connecting rods (84) or attached to the inside of the plurality of connecting rods (84).

6. The centrifugal pump vacuum water diversion device for mine drainage in a high stress environment according to claim 3, characterized in that: A filter screen II (17) is fixedly arranged at the water outlet I (11) and / or the water inlet I (18) in the vacuum water diversion tank (1).

7. The centrifugal pump vacuum water diversion device for mine drainage in a high stress environment according to claim 1, characterized in that: A conical tank body (15) is provided at the bottom of the vacuum water diversion tank (1), the water outlet I (11) is higher than the top of the conical tank body (15), and a sewage outlet (16) is provided at the bottom of the conical tank body (15).

8. The centrifugal pump vacuum water diversion device for mine drainage in a high stress environment according to claim 7, characterized in that: A base (7) is fixedly arranged below the vacuum water diversion tank (1), and the vacuum water diversion tank (1) is fixedly arranged on the upper end of the base (7). At least one side of the base (7) is provided with a clearance groove extending to the middle, and the sewage outlet (16) is arranged in the clearance groove. The water outlet I (11) is arranged horizontally and its center line is flush with the center line of the water inlet II of the water pump (2).

9. The centrifugal pump vacuum water diversion device for mine drainage in a high stress environment according to any one of claims 1 to 8, characterized in that: The water inlet II of the water pump (2) is connected to the water outlet I (11) via an eccentric reducer (9), and the water outlet II of the water pump (2) is connected to the main drainage pipe (6) via a flange (63).

10. The centrifugal pump vacuum water diversion device for mine drainage in a high stress environment according to claim 9, characterized in that: A water level control line or a water level monitoring device is provided inside the water tank (3), and the water inlet II of the water pump (2) is 0.2 to 0.3 m lower than the safe water depth in the vacuum water tank (1).

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