A centrifugal water diversion device and implementation method thereof

Abstract

The present invention discloses a centrifugal water diversion device, including a centrifugal pump with a water outlet pipe connected to the pump casing, a water injection and air extraction mechanism, and a water pumping pipeline with one end extending into the ground; the water injection and air extraction mechanism includes a first flange pipe connected to the other end of the water pumping pipeline at one end, a second flange pipe connected to the first flange pipe at one end and connected to the pump casing of the centrifugal pump at the other end, a check valve arranged at the connection between the first flange pipe and the second flange pipe, and an exhaust pipe connected to the first flange pipe at one end and connected to the second flange pipe through an exhaust mechanism at the other end. Based on the above structure, the present invention also provides a method for realizing the centrifugal water diversion device. The present invention is reasonably designed and easy to use, which not only avoids the need for repeated shutdown and manual water filling of the centrifugal pump during operation, but also avoids the problem that the end of the water pumping pipeline is easily broken, and well solves a major problem of existing centrifugal pumps in practical applications. Therefore, the present invention is suitable for popularization and application.

Description

Technical Field

[0001] The invention relates to the technical field of water diversion, and in particular to a centrifugal water diversion device and an implementation method thereof. Background Art

[0002] Centrifugal pumps are the most common type of pumps that transport fluids from one place to another, and are currently widely used. Generally speaking, before starting a centrifugal pump, you need to manually fill the pump casing and the pumping pipe (hose) with water, and then start the centrifugal pump. After the centrifugal pump is started, the impeller rotates at high speed driven by the motor to generate centrifugal force. At this time, the pressure near the impeller shaft decreases, forming a local vacuum. The atmospheric pressure forces the groundwater in the lower part to push open the bottom valve at the end of the pumping pipe, and then enter the pump casing along the pumping pipe. The water in the pump casing and the pumped water are successively thrown into the outlet pipe by the impeller and discharged, and the cycle continues, thereby continuously pumping the water from the lower part to the higher part.

[0003] However, the existing centrifugal pumping method has the following problems in actual use:

[0004] 1. During the operation of the centrifugal pump, once there is less groundwater, resulting in the pump casing being not full of water, the centrifugal pump will be evacuated due to the presence of air in the pump casing and the suction pipe. The low pressure formed in the center area of ​​the impeller will not be able to pump up the groundwater, resulting in air binding problems and inability to drain water normally. At this time, the centrifugal pump must be turned off and shut down, and then the pump casing and the suction pipe must be manually refilled with water to empty the air in the pump casing and the suction pipe before the centrifugal pump can be started to continue draining water.

[0005] Moreover, because the centrifugal pump pumps clear water, the water is mixed with impurities. When the centrifugal pump is shut down, the impurities may get stuck in the bottom valve, making it unable to close completely, thus causing water leakage.

[0006] In this way, the whole operation is very troublesome because of the need for repeated manual filling of water, and the impurities that may be stuck in the bottom valve must be cleaned first (otherwise it cannot be filled with water). At the same time, repeated shutdowns can easily shorten the service life of the centrifugal pump.

[0007] 2. The pumping pipe is directly connected to the pump casing. Before starting the centrifugal pump, it is necessary to manually fill the pump casing and the pumping pipe with water. The longer the pumping pipe is, the greater the amount of water filled, the higher the workload of the workers, and air binding is more likely to occur during the operation of the centrifugal pump.

[0008] 3. During the pumping and drainage operation, once the centrifugal pump is shut down and the bottom valve is not stuck by impurities, the bottom valve blocks the water in the pumping pipe from flowing back to the underground and all the water is concentrated at the bottom of the pumping pipe, causing the bottom of the pumping pipe to be instantly subjected to very high water pressure, which can easily break the end of the pumping pipe. Therefore, auxiliary reinforcement support is required for the bottom of the pumping pipe to avoid this problem, but this also further increases the complexity of the operation.

[0009] Therefore, it is necessary to improve this situation. Summary of the invention

[0010] In view of the above-mentioned deficiencies of the prior art, the present invention provides a centrifugal water diversion device, which has the advantages that the centrifugal pump does not need to be shut down and repeatedly filled with water manually during continuous operation, and the end of the water pumping pipe will not be broken by pressure.

[0011] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0012] A centrifugal water diversion device comprises a centrifugal pump with a water outlet pipe connected to the pump casing, a water injection and air extraction mechanism and a water extraction pipe with one end extending into the ground; the water injection and air extraction mechanism comprises a first flange pipe connected to the other end of the water extraction pipe at one end, a second flange pipe connected to the first flange pipe at one end and connected to the pump casing of the centrifugal pump at the other end, a flippable check valve arranged at the connection between the first flange pipe and the second flange pipe, and an exhaust pipe connected to the first flange pipe at one end and connected to the second flange pipe at the other end through an air extraction and exhaust mechanism; the air extraction and exhaust mechanism comprises an inverted tapered pipe connected to the second flange pipe at one end and connected to the exhaust pipe at the other end, and a blocking block placed in the inverted tapered pipe; the width of the blocking block is greater than or equal to the diameter of the exhaust pipe and smaller than the diameter of the upper end of the inverted tapered pipe, and a stopper is provided at the upper end of the inverted tapered pipe.

[0013] Furthermore, the upper tube walls of the first flange tube and the second flange tube are each provided with a through hole; one end of the exhaust pipe is connected to the through hole on the first flange tube; and one end of the inverted cone tube is connected to the through hole on the second flange tube.

[0014] Preferably, the blocking block is a stainless steel ball, the diameter of which is equal to the diameter of the exhaust pipe.

[0015] Preferably, the inverted tapered tube is made of a transparent material.

[0016] Furthermore, the present invention also includes a screw adjustment mechanism for adjusting the opening degree of the check valve; a through hole is opened on the second flange pipe near the check valve, and a nut for threaded cooperation with the screw adjustment mechanism is welded on the through hole.

[0017] Based on the above structure, the present invention also provides a method for implementing the centrifugal water diversion device, comprising the following steps:

[0018] (1) Pour water into the pump casing from the outlet pipe until the pump casing and the second flange pipe are filled with water and then stop pouring water;

[0019] (2) Turn on the centrifugal pump. Under the centrifugal force generated by the high-speed rotation of the centrifugal pump impeller, the pressure near the impeller shaft decreases, forming a local vacuum, and negative pressure is formed in the inverted tapered tube. The blockage is sucked up, so that the exhaust pipe is connected with the inverted tapered tube and the second flange pipe. The air in the first flange pipe and the water pumping pipe enters the second flange pipe through the exhaust pipe and the inverted tapered tube;

[0020] (3) When the air in the first flange pipe and the pumping pipe is gradually discharged, the groundwater slowly enters the first flange pipe through the pumping pipe under the action of atmospheric pressure. At the same time, under the action of centrifugal force, the check valve is opened. At this time, the groundwater enters the second flange pipe and is finally thrown into the outlet pipe under the action of the high-speed rotation of the impeller and continuously discharged from the outlet pipe.

[0021] Furthermore, when the air in the first flange pipe and the water pumping pipe is gradually exhausted and a vacuum is formed, the block slowly falls under the action of gravity and the decreasing negative pressure and finally blocks the exhaust pipe.

[0022] Furthermore, when the pump casing is not full of water, the centrifugal pump is evacuated and the check valve closes automatically. At this time, negative pressure continues to be generated in the inverted tapered pipe, and the blockage is sucked upward, so that the exhaust pipe is reconnected with the inverted tapered pipe and the second flange pipe.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] (1) The present invention ingeniously adds a water injection and air extraction mechanism between the pump casing and the water pumping pipe of the centrifugal pump, and utilizes the operating characteristics of the centrifugal pump in combination with the design of the water injection and air extraction mechanism. During the process of using the centrifugal pump to pump water and drain water, under the action of the high-speed rotation of the impeller, combined with the automatic opening and closing of the check valve, negative pressure will be repeatedly generated in the inverted cone pipe depending on whether the pump casing is full of water. When negative pressure is generated, the adsorption block will move upward, and when the negative pressure disappears, the block will fall freely. Combined with the shape of the inverted cone pipe (wide at the top and narrow at the bottom) and the relationship between the block width, the exhaust pipe diameter, the upper end diameter of the inverted cone pipe, and the design of the block, the exhaust pipe can be repeatedly connected to the inverted cone pipe and the second flange pipe through the block.

[0025] In this way, on the one hand, the above working principle will enable the air in the first flange pipe and the water pumping pipe to be discharged; on the other hand, when the air is discharged, the negative pressure disappears, the blockage falls and blocks the exhaust pipe again, closing it, and the centrifugal pump can pump and drain water normally without affecting the work. The present invention can basically achieve drainage within 5 minutes (actual measurement) after starting the centrifugal pump, and during the operation, if the pump casing is not full of water, due to the centrifugal pump being evacuated, the check valve is closed, and negative pressure will be generated in the inverted cone pipe, which will absorb the blockage and move upward, so that the exhaust pipe is connected with the inverted cone pipe and the second flange pipe again, and the air in the first flange pipe and the water pumping pipe can be discharged, so that the groundwater can continue to enter the first flange pipe under the action of atmospheric pressure. After the groundwater enters the first flange pipe, the evacuation no longer exists, the check valve will be opened again, and the water will enter the second flange pipe and the pump casing until the pump casing and the second flange pipe are full of water again, and then the water can continue to be drained.

[0026] Therefore, the present invention designs a water injection and air extraction mechanism so that after the centrifugal pump is started, there is no need to repeatedly shut down and manually fill it with water during operation, thus avoiding cumbersome centrifugal pump shutdown and water filling operations, and ensuring the service life of the centrifugal pump to the greatest extent.

[0027] (2) The water injection and air extraction mechanism designed by the present invention has a simple structure and low cost. After designing the water injection and air extraction mechanism, the present invention no longer needs to set a bottom valve at the end of the water extraction pipe. In this way, not only does it not need to add an auxiliary reinforcement mechanism, but there is no need to worry about water leakage caused by the bottom valve being stuck by impurities. At the same time, when filling water, relying on the isolation of the check valve, it is only necessary to fill the pump housing and the second flange pipe with water, which also greatly reduces the amount of water filling and greatly reduces the work intensity of workers.

[0028] Moreover, in the present invention, since the water filling amount is fixed (it is only necessary to fill the pump casing and the second flange pipe with water), no matter how long the pumping pipeline is arranged, the water filling time is not long, and the operation is very convenient. Therefore, compared with the prior art, the present invention can better meet the actual application scenarios and needs of the on-site construction site.

[0029] (3) The centrifugal pumping method adopted by the present invention has a check valve that isolates the two sections of flange pipes and there is no bottom valve in the pumping pipe. Therefore, even if the centrifugal pump is shut down, the bottom end of the pumping pipe is under very little pressure or is basically not under pressure. There is no risk of the end being broken, which greatly extends the service life of the pumping pipe.

[0030] (4) The inverted tapered tube in the present invention is made of a transparent material, which makes it easy to observe the movement of the block.

[0031] (5) The present invention is provided with a screw adjustment mechanism, which can facilitate manual adjustment of the opening degree of the check valve to achieve adjustment of the water discharge volume.

[0032] (6) The present invention has a reasonable design and low cost, completely avoids the problem of air binding during use, is very convenient to use, and is suitable for large-scale promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the present invention.

[0034] Figure 2 for Figure 1 A magnified schematic diagram of center A.

[0035] Figure 3 Schematic diagram of the arrangement of the check valve in the embodiment of the present invention

[0036] Figure 4 Schematic diagram of the initial state of the block in the embodiment of the present invention.

[0037] Figure 5 It is a schematic diagram of the state when the blockage is adsorbed in the embodiment of the present invention.

[0038] Figure 6 Another structural schematic diagram of the present invention.

[0039] Figure 7 for Figure 6 A magnified schematic diagram of point B in the middle.

[0040] Figure 8 Schematic diagram of the initial state of the screw adjustment mechanism and the check valve.

[0041] Fig. 9 A schematic diagram of a state when the screw adjustment mechanism adjusts the opening degree of the check valve.

[0042] Fig.10 This is a schematic diagram of another state when the screw adjustment mechanism adjusts the opening degree of the check valve.

[0043] The names corresponding to the reference numerals are:

[0044] 1-centrifugal pump, 2-pump casing, 3-water outlet pipe, 4-second flange pipe, 5-inverted tapered pipe, 51-block, 6-block, 7-exhaust pipe, 8-check valve, 81-rotating shaft, 9-first flange pipe, 10-water pumping pipe, 11-screw adjustment mechanism. DETAILED DESCRIPTION

[0045] The present invention is further described below in conjunction with the accompanying drawings and embodiments. The embodiments of the present invention include but are not limited to the following embodiments.

[0046] Example

[0047] The present invention provides a water diversion device, which is used in conjunction with a centrifugal pump to achieve groundwater pumping and drainage. Figures 1 to 4 As shown, the structure of the present invention mainly includes three parts: a centrifugal pump 1, a water injection and air extraction mechanism, and a water extraction pipeline 10. Among them, the water injection and air extraction mechanism is the core component of the whole scheme, which includes a first flange pipe 9 connected to the water extraction pipeline 10 at one end through a 45° elbow, a second flange pipe 4 connected to the first flange pipe 9 at one end and connected to the pump casing 2 of the centrifugal pump 1 (the pump casing is connected to the water outlet pipe 3) at the other end, and a check valve 8 arranged near the connection between the first flange pipe 9 and the second flange pipe 4 and can be turned over (the check valve 8 is connected to the end of the first flange pipe 9 through a rotating shaft 81, as shown in FIG. Figure 3 As shown), and an exhaust pipe 7 having one end connected to the first flange pipe 9 and the other end connected to the second flange pipe 4 through an exhaust mechanism.

[0048] The exhaust mechanism comprises an inverted tapered tube 5, one end of which is connected to the second flange tube 4 and the other end of which is connected to the exhaust pipe 7, and a blocking block 6 placed in the inverted tapered tube 5. Specifically, the upper tube wall of the first flange tube 9 and the second flange tube 4 are each provided with a through hole; one end of the exhaust pipe 7 is connected to the through hole on the first flange tube 9; and one end of the inverted tapered tube 5 is connected to the through hole on the second flange tube 4.

[0049] At the same time, in this embodiment, the block 6 is used to block the port of the exhaust pipe 7, and it is preferably made of a stainless steel ball with a diameter equal to the diameter of the exhaust pipe and smaller than the diameter of the upper end of the inverted cone 5, and a stopper 51 is provided at the upper end of the inverted cone tube 5; and the inverted cone tube 5 is made of a transparent material, which is convenient for observing the movement of the block 6.

[0050] The following describes the working process of the present invention based on the structure of the above-mentioned device.

[0051] First, water is poured into the pump housing 2 from the water outlet pipe until the pump housing 2 and the second flange pipe 4 are filled with water, and then the water is stopped. Then, the centrifugal pump 1 is turned on. At this time, under the centrifugal force generated by the high-speed rotation of the centrifugal pump impeller, the pressure near the impeller shaft decreases, forming a local vacuum, and a negative pressure is formed in the inverted cone pipe 5, and the block 6 is sucked up. Since the inverted cone pipe 5 is wide at the top and narrow at the bottom, and is provided with a stopper 51, after the block 6 is sucked up, the exhaust pipe 7 will be connected with the inverted cone pipe 5 and the second flange pipe 4, and the air in the first flange pipe 9 and the water pumping pipe 10 will enter the second flange pipe 4 through the exhaust pipe 7 and the inverted cone pipe 5. Figure 4 , 5 The schematic diagram shows the initial state of the block and the state of adsorption. Figure 5 The arrows in the diagram indicate the direction of air flow.

[0052] When the air in the first flange pipe 9 and the pumping pipe 10 is gradually discharged, the groundwater slowly enters the first flange pipe 9 through the pumping pipe 10 under the action of atmospheric pressure. At the same time, under the action of centrifugal force, the check valve 8 is opened, and the groundwater enters the second flange pipe, and is finally thrown into the outlet pipe under the action of the high-speed rotation of the impeller, and is continuously discharged from the outlet pipe. When the air in the first flange pipe 9 and the pumping pipe 10 is gradually discharged and a vacuum is formed, the block 6 slowly falls under the action of gravity and the decreasing negative pressure and finally blocks the exhaust pipe 7, closing it.

[0053] When the pump housing 2 and the second flange pipe 4 are not full of water, the centrifugal pump 1 is evacuated and the check valve 8 is automatically closed. At this time, negative pressure continues to be generated in the inverted cone pipe 5, and the block 6 is sucked upward, so that the exhaust pipe 7 is connected with the inverted cone pipe 5 and the second flange pipe 4 again, and the air in the first flange pipe 9 and the pumping pipe 10 is discharged, so that the groundwater can continue to enter the first flange pipe 9 under the action of atmospheric pressure. After the groundwater enters the first flange pipe 9, the evacuation no longer exists, the check valve 8 will be opened again, and the water will enter the second flange pipe 4 and the pump housing 2 until the pump housing 2 and the second flange pipe 4 are full of water again, and then the water can continue to be drained.

[0054] In addition, during the above-mentioned pumping and drainage process, the present invention can achieve the regulation of drainage volume, such as Figure 6 , 7 As shown, only a screw adjustment mechanism 11 (composed of a rotating hand wheel + screw + sealing ring) is required, and then a through hole is provided on the second flange pipe 4 near the check valve 8, a nut for threaded cooperation with the screw adjustment mechanism is welded on the through hole, the screw is inserted into the second flange pipe, and one side of the check valve 8 is an inclined surface. When the opening degree of the check valve 8 needs to be adjusted, the screw is rotated by turning the hand wheel to drive it to rotate the thread, thereby adjusting the distance it moves up and down, and the opening degree of the check valve can be adjusted (the further the screw moves down, the smaller the opening degree of the check valve), as shown in FIG. Figures 8 to 10 As shown, Fig. 9 , 10 The arrows in the figure represent the water flow direction and the moving direction of the screw rod, respectively. Of course, the present invention can also adopt the design of motor + inverter to control the opening degree of the check valve in an electric way, but the cost investment will be relatively high.

[0055] The present invention only needs to add a water injection and air extraction mechanism on the basis of the existing centrifugal pump operation structure to have the following advantages:

[0056] (1) The centrifugal pump does not need to be repeatedly shut down and manually filled with water during operation, which not only ensures the service life of the centrifugal pump, but also greatly reduces the amount of water filled, reduces the workload of workers, and completely solves the problem of air binding;

[0057] (2) There is no need to install a bottom valve or add an auxiliary reinforcement mechanism at the end of the pumping pipe, and there is no need to worry about water leakage caused by the bottom valve being stuck by impurities.

[0058] (3) The pumping pipeline can be fully extended to meet the actual application scenarios and needs of the on-site construction site;

[0059] (4) During the pumping and drainage operation, even if the centrifugal pump is turned off, the bottom of the pumping pipe is basically not under pressure, and there is no risk of the end being broken by pressure, which greatly extends the service life of the pumping pipe;

[0060] (5) The water injection and air extraction mechanism has a simple structure and low cost. It can be said that it has solved a major problem of existing centrifugal pumps in practical applications through ingenious design.

[0061] Therefore, compared with the prior art, the present invention has outstanding substantial features and significant progress.

[0062] The above embodiment is only one of the preferred implementation modes of the present invention and should not be used to limit the protection scope of the present invention. Any changes or modifications that are made to the main design concept and spirit of the present invention and have no substantive significance, and the technical problems they solve are still consistent with the present invention, should be included in the protection scope of the present invention.

Claims

1. A centrifugal water diversion device, characterized in that: The invention comprises a centrifugal pump (1) having a water outlet pipe (3) connected to a pump casing, a water injection and air extraction mechanism, and a water extraction pipe (10) with one end extending into the ground; the water injection and air extraction mechanism comprises a first flange pipe (9) having one end connected to the other end of the water extraction pipe (10), a second flange pipe (4) having one end connected to the first flange pipe (9) and the other end connected to the pump casing of the centrifugal pump (1), a reversible check valve (8) arranged near the connection between the first flange pipe (9) and the second flange pipe (4), and an exhaust pipe (7) having one end connected to the first flange pipe (9) and the other end connected to the second flange pipe (4) through an air extraction and exhaust mechanism; the air extraction and exhaust mechanism comprises an inverted tapered pipe (5) having one end connected to the second flange pipe (4) and the other end connected to the exhaust pipe (7), and a blocking block (6) placed in the inverted tapered pipe (5); the width of the blocking block (6) is greater than or equal to the diameter of the exhaust pipe and smaller than the diameter of the upper end of the inverted tapered pipe (5), and a stopper (51) is provided at the upper end of the inverted tapered pipe (5).

2. A centrifugal water diversion device according to claim 1, characterized in that: The first flange pipe (9) and the second flange pipe (4) are each provided with a through hole on their upper pipe walls; one end of the exhaust pipe (7) is connected to the through hole on the first flange pipe (9); and one end of the inverted cone pipe (5) is connected to the through hole on the second flange pipe (4).

3. A centrifugal water diversion device according to claim 2, characterized in that: The blocking block (6) is a stainless steel ball, and its diameter is equal to the diameter of the exhaust pipe.

4. A centrifugal water diversion device according to claim 2 or 3, characterized in that: The inverted cone tube (5) is made of a transparent material.

5. A centrifugal water diversion device according to any one of claims 1 to 3, characterized in that: It also includes a screw adjustment mechanism (11) for adjusting the opening degree of the check valve (8); a through hole is provided on the second flange pipe (4) near the check valve, and a nut is welded on the through hole for threaded engagement with the screw adjustment mechanism.

6. The method for implementing the centrifugal water diversion device according to any one of claims 1 to 5, characterized in that: The following steps are involved: (1) Pour water into the pump casing from the outlet pipe until the pump casing and the second flange pipe are filled with water and then stop pouring water; (2) Turn on the centrifugal pump. Under the centrifugal force generated by the high-speed rotation of the centrifugal pump impeller, the pressure near the impeller shaft decreases, forming a local vacuum, and negative pressure is formed in the inverted cone pipe. The blockage is sucked up, so that the exhaust pipe is connected with the inverted cone pipe and the second flange pipe. The air in the first flange pipe and the water pumping pipe enters the second flange pipe through the exhaust pipe and the inverted cone pipe. (3) When the air in the first flange pipe and the pumping pipe is gradually discharged, the groundwater slowly enters the first flange pipe through the pumping pipe under the action of atmospheric pressure. At the same time, the check valve is opened under the action of centrifugal force. At this time, the groundwater enters the second flange pipe and is finally thrown into the outlet pipe under the action of the high-speed rotation of the impeller and continuously discharged from the outlet pipe.

7. The method for implementing a centrifugal water diversion device according to claim 6, characterized in that: When the air in the first flange pipe and the water pumping pipe is gradually exhausted and a vacuum is formed, the block slowly falls down under the action of gravity and the decreasing negative pressure and finally blocks the exhaust pipe.

8. The method for implementing a centrifugal water diversion device according to claim 7, characterized in that: When the pump casing is not full of water, the centrifugal pump is evacuated and the check valve closes automatically. At this time, negative pressure continues to be generated in the inverted tapered pipe, and the blockage is sucked upward, so that the exhaust pipe is reconnected with the inverted tapered pipe and the second flange pipe.

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