A self-priming pump device

Abstract

The application relates to a self-priming pump device with self-bleeding, which comprises a water inlet pipe, a sealed water guide tank and a self-priming pump connected in sequence. The sealed water guide tank is internally provided with a water suction and air exhaust pipe, which is a vertically arranged hollow pipe with two closed ends, and a plurality of small water inlet holes are arranged in the lateral surface of the pipe. The self-priming pump comprises a water pump cylinder and a primary guide wheel, and an air exhaust device is arranged outside the primary guide wheel and inside the water pump cylinder. The air exhaust device comprises a base plate, a plurality of air holes are arranged on the surface of the base plate, the air holes are connected with air exhaust and water supplement pipes with different lengths and top openings, and a gap is left between the base plate and the outer periphery of the primary guide wheel as a water passing surface. The self-bleeding self-priming pump device can suck water sources with low liquid levels, automatically exhaust the accumulated air in the sealed water guide tank and the water pump, and automatically change the air exhaust speed according to the amount of the accumulated air, so that the water pump can normally work without being affected by insufficient liquid guiding or air accumulation.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of self-priming pumps, in particular to a self-priming pump device with self-venting function. BACKGROUND

[0002] Water is an indispensable material in people's life, and with the rapid advancement of urbanization, people's demand for water quality improvement is also getting higher and higher, and it has become a trend to use fast and efficient water treatment methods to improve water quality. In some water treatment systems, water needs to be taken from low water level sources, and self-priming pumps are widely used in this place.

[0003] Self-priming pumps belong to self-priming centrifugal pumps, which have the advantages of compact structure, easy operation, stable running, easy maintenance, high efficiency, long service life and strong self-priming capacity. And the pipeline does not need to install a bottom valve, and only needs to ensure that a certain amount of priming liquid is stored in the pump body before work. The working principle of the self-priming pump is that before the water pump starts, the pump casing is filled with water or the pump itself has water as priming liquid, and after starting, the impeller rotates at high speed to make the priming liquid in the impeller channel flow to the volute, at this time, a vacuum is formed at the inlet to open the inlet check valve, and the air and water in the suction pipe enter the pump and reach the outer edge through the impeller channel.

[0004] Self-priming pumps may encounter some common problems in daily use: for example, the self-priming pump does not pump water. The main reason is that after a long time of operation, due to air entering the pipeline and gas decomposition in water, gas continues to accumulate in the water pump and the priming pipe before the water pump and cannot be removed, causing the priming liquid level to drop to the point where the water cannot be pumped, and ultimately the water pump cannot continue to work normally. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a self-priming pump device with self-venting function, which automatically removes the accumulated air in the priming tank and water pump while pumping low liquid level water sources, improves efficiency, reduces maintenance frequency and time.

[0006] The technical solution adopted by the present application to solve the technical problem is: a self-priming pump device with self-venting function is provided, which comprises a priming tank inlet pipe, a sealed priming tank and a self-priming pump connected in sequence. The sealed priming tank is provided with a water suction and air exhaust pipe, which is a vertically arranged hollow pipe with two closed ends, and a plurality of small water inlet holes are arranged in the longitudinal direction on the side surface of the pipe. The lower end of the water suction and air exhaust pipe is connected to the water pump inlet of the self-priming pump through a water pump inlet pipe. The self-priming pump comprises a water pump cylinder and a primary guide wheel located below the water pump inlet. An air exhaust device is arranged outside the primary guide wheel and inside the water pump cylinder. The air exhaust device comprises a base plate, a plurality of air holes are arranged on the surface of the base plate, the air holes are connected to air exhaust and water supplement pipes with different lengths and open at the top surface, and a gap is left between the base plate and the outer periphery of the primary guide wheel as a water surface.

[0007] Further, one end of the water inlet pipe of the water guide tank is connected with the low water source, and the other end is connected with the upper part of the sealed water guide tank.

[0008] Further, the base plate of the exhaust device is annular.

[0009] Further, three small water inlet holes are arranged on the side of the water suction and exhaust pipe, and are arranged at the upper part, the middle part and the lower part of the water suction and exhaust pipe respectively.

[0010] Further, the number of the exhaust water supplement pipes is two, one shorter exhaust water supplement pipe is arranged on the side close to the water inlet of the water pump and has a lower height than the lower edge of the water inlet of the water pump, and one longer exhaust water supplement pipe is arranged on the opposite side of the shorter exhaust water supplement pipe and has a higher height than the upper edge of the water inlet of the water pump.

[0011] Further, the hole area of the small water inlet hole is matched with the cross-sectional area of the water pump water inlet pipe.

[0012] Beneficial effects

[0013] The self-suction pump device provided by the application can suck the water source with a low liquid level, automatically exhaust the accumulated air in the sealed water guide tank and the water pump, and automatically change the exhaust speed according to the amount of the accumulated air, so that the water pump can work normally without being affected by insufficient water suction or air accumulation.

[0014] The self-suction pump device provided by the application has simple structure and low cost, the water suction and exhaust pipe with different height water suction and exhaust ports is arranged in the sealed water guide tank, so that the accumulated air in the upper part of the sealed water guide tank can be automatically sucked, the exhaust device and the exhaust water supplement pipe on the exhaust device are arranged in the water pump, so that the air accumulated in the upper part of the water pump cylinder can be sucked and dissolved in the water to be delivered, and the exhaust speed can be changed according to the amount of the air and the liquid level, so that the self-suction and exhaust problems of the water pump can be solved once and for all, and the continuous and safe operation of the water pump is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic view of a self-exhausting self-suction pump device.

[0016] Figure 2 It is Figure 1 It is a three-dimensional structural schematic view of the exhaust device.

[0017] In the figure, 1 is a water guide tank water inlet pipe, 2 is a sealed water guide tank, 3 is a water suction and exhaust pipe, 4 is a water pump water inlet pipe, 5 is a water pump cylinder, 6 is an impeller, 7 is a primary guide wheel, 8 is a secondary guide wheel, 9 is a pump shaft, 10 is a sealing element, 11 is a water outlet support, 12 is a shaft coupling, 13 is an electric motor, 14 is a water pump water inlet, 15 is a water pump water outlet, 16 is an exhaust device, 16.1 is an exhaust water supplement pipe A, 16.2 is an exhaust water supplement pipe B, 17 is a water passing surface, and 18 is a water filling port.

[0018] The same markings in each diagram represent the same component. Detailed Implementation

[0019] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0020] like Figure 1 As shown, the present invention provides a self-priming pump device with self-venting capability, comprising a water inlet pipe 1, a sealed water tank 2, and a self-priming pump connected in sequence. The sealed water tank 2 has a water inlet 18 at its top. The self-priming pump consists of a pump body 5, a water outlet support 11, and a motor 13 above the water outlet support 11, arranged sequentially from bottom to top. A water inlet 14 is located on one side of the pump body 5, and a water outlet 15 is located on one side of the water outlet support 11. A primary guide wheel 7 and several secondary guide wheels 8 are coaxially arranged inside the pump body 5, below the water inlet 14, and below the water outlet 15, respectively. Each of the primary guide wheel 7 and the several secondary guide wheels 8 has an impeller 6 inside. All impellers 6 are connected to the motor 13 via a pump shaft 9 and a coupling 12. The pump shaft 9 is connected to the water outlet support 11 via a seal 10.

[0021] The sealed water tank 2 is equipped with a water intake and exhaust pipe 3. The water intake and exhaust pipe 3 is a vertically arranged hollow pipe with closed ends. Several small water inlets are arranged in a row on its side. The lower end of the water intake and exhaust pipe 3 is connected to the water pump inlet 14 of the self-priming pump through the water pump inlet pipe 4. An exhaust device 16 is provided outside the first-stage guide wheel 7 and inside the water pump cylinder 5. The exhaust device 16 includes a base plate. Several air holes are provided on the surface of the base plate. The air holes are connected to exhaust and water supply pipes of different lengths and open at the top. A gap is left between the base plate and the outer periphery of the first-stage guide wheel 7 as a water passage surface 17.

[0022] In this embodiment, the area of ​​the small water inlet hole matches the cross-sectional area of ​​the water pump inlet pipe 4.

[0023] In this embodiment, one end of the water inlet pipe 1 of the water tank is connected to a low-level water source for self-priming water from the low-level water source, and the other end is connected to the upper part of the sealed water tank 2.

[0024] like Figure 2As shown, in this embodiment, the base plate of the exhaust device 16 is annular, the air hole is opened on the annular surface, and two exhaust water supply pipes are fixed by welding. The shorter one is exhaust water supply pipe A16.1, which is located near the water pump inlet 14 and its height is lower than the lower edge of the water pump inlet 14; the longer one is exhaust water supply pipe B16.2, which is located on the opposite side of the shorter one and its height is higher than the upper edge of the water pump inlet 14.

[0025] In this embodiment, the water intake and exhaust pipe 3 has three small water inlet holes on its side, which are respectively located at the upper, middle and lower parts of the water intake and exhaust pipe 3.

[0026] The working principle of this invention is described in detail below:

[0027] Before the initial startup of this invention, water is injected into the sealed water tank 2 from the outside through the water inlet 18 to provide initial priming liquid. After the sealed water tank 2 is completely filled, the water inlet 18 is closed. Subsequently, the self-priming pump system is started to pump water. As the initial priming liquid level in the sealed water tank 2 gradually decreases, the negative pressure in the sealed water tank 2 gradually increases. Atmospheric pressure can then force the low-level water source into the sealed water tank 2 through the water inlet pipe 1. When the low-level water source enters the sealed water tank 2 through the water inlet pipe 1, it passes through the water suction and exhaust pipe 3 and the water pump inlet pipe 4, and enters the water pump through the water pump inlet 14. The water is then discharged from the water pump outlet 15 by the water pump, continuously supplying water to the user.

[0028] The automatic venting principle of the sealed water tank 2 is as follows:

[0029] The suction and exhaust pipe 3 in the sealed water tank 2 has several small water inlets at different heights. The total water inlet area of ​​these small water inlets is equivalent to the passage area of ​​the water pump inlet pipe 4. When the liquid level in the sealed water tank 2 is lower than the highest small water inlet on the suction and exhaust pipe 3, the other small water inlets of the suction and exhaust pipe 3 in the sealed water tank 2 can only provide part of the required flow. The insufficient part will be drawn from the upper part of the sealed water tank 2 through the small water inlet exposed at the top of the suction and exhaust pipe 3, which will increase the speed of negative pressure rise in the sealed water tank 2 until the liquid level in the sealed water tank 2 rises until it submerges all the small water inlets on the suction and exhaust pipe 3. Then the water pump inlet pipe 4 will obtain a complete flow from the suction and exhaust pipe 3 again, so that the water pump can reach its maximum operating efficiency again.

[0030] In this invention patent, if a large amount of gas is generated in the sealed water tank 2, the liquid level drops rapidly and becomes low. As a result, the number of small water inlets exposed on the water intake and exhaust pipe 3 increases, the exhaust speed is fast, the negative pressure inside the sealed water tank 2 rises faster, and the liquid level rises. This allows the liquid level in the sealed water tank 2 to be quickly restored to a high level, enabling the water pump to reach its maximum operating efficiency again.

[0031] The pump operation and automatic venting principle are as follows: When there is sufficient water and no gas accumulation, the water level in the pump body 5 is high, exceeding the highest venting and water supply pipe B16.2. At this time, water enters the pump body 5 from the pump inlet 14, and then enters the lower part of the pump body 5 through the venting and water supply pipe B16.2, the venting and water supply pipe A16.1, and the lower water surface 17. It is then drawn in by the impeller 6 in the first-stage guide wheel 7 and sent to the secondary guide wheel 8. The impeller 6 in the secondary guide wheel 8 continues to transport the water. The number of secondary guide wheels 8 and impellers 6 can be set as needed, and they are raised step by step. Finally, the water is discharged from the pump outlet 15 of the outlet bracket 11.

[0032] If a small amount of gas has accumulated during pump operation, and the water level inside the pump body 5 is lower than the highest exhaust water supply pipe B16.2, water enters the pump body 5 from the pump inlet 14, passes through the exhaust water supply pipe A16.1 and the lower water flow surface 17, and then enters the lower part of the pump body 5. Since the water level inside the pump body 5 is lower than the highest exhaust water supply pipe B16.2, the exhaust water supply pipe B16.2 cannot pass water. At this time, the total flow area cannot meet the pump's suction requirements. The insufficient part will draw air accumulated in the upper part of the pump body 5 from the exhaust water supply pipe B16.2, mix it with the transported water, and be pumped away, increasing the negative pressure rise speed in the upper part of the pump body 5. The liquid level in the pump body 5 will rise rapidly.

[0033] When the water pump is running, if a large amount of gas accumulates, the water level inside the pump body 5 will drop rapidly. If the liquid level is lower than all the venting and water supply pipes A16.1 and B16.2, the total flow area is far from meeting the pump's suction requirements. The insufficient portion will be vented simultaneously from venting and water supply pipes A16.1 and B16.2, mixed with the transported water, and pumped away. This accelerates the negative pressure rise at the top of the pump body 5, allowing the liquid level to recover quickly. Once the liquid level is higher than all the venting and water supply pipes, all venting and water supply pipes and the water surface 17 can flow, meeting the pump's water supply requirements, and the pump can deliver water normally. This invention allows for venting within the pump based on the amount of air and the liquid level at the top of the pump body 5, enabling different venting and water supply pipes to perform venting operations, thus quickly restoring the pump to normal water supply.

[0034] This invention has a simple structure and low cost. By setting a water intake and exhaust pipe 3 inside the sealed water tank 2, and having water intake and exhaust ports of different heights on the water intake and exhaust pipe 3, it can automatically draw in the accumulated air in the upper part of the sealed water tank 2. At the same time, an exhaust device 16 and an exhaust water supply pipe on the exhaust device 16 are set in the water pump to draw in the gas accumulated in the upper part of the water pump cylinder 5 and dissolve it into the transported water. The exhaust speed can be changed according to the amount of air and the liquid level. This invention can solve the problems of water pump self-priming and exhaust once and for all, and ensure the continuous and safe operation of the water pump.

Claims

1. A self-priming pump device for self-venting, comprising a water inlet pipe (1), a sealed water tank (2), and a self-priming pump connected in sequence, characterized in that, The sealed water tank (2) is provided with a water intake and exhaust pipe (3). The water intake and exhaust pipe (3) is a vertically arranged hollow pipe with closed ends. Several small water inlets are arranged in a row on its side. The lower end of the water intake and exhaust pipe (3) is connected to the water pump inlet (14) of the self-priming pump through the water pump inlet pipe (4). The self-priming pump includes a water pump body (5) and a first-stage guide wheel (7) located below the water pump inlet (14). An exhaust device (16) is provided outside the first-stage guide wheel (7) and inside the water pump body (5). The exhaust device (16) includes a base plate. Several air holes are provided on the surface of the base plate. The air holes are connected to exhaust water supply pipes of different lengths and open top surfaces. A gap is left between the base plate and the outer periphery of the first-stage guide wheel (7) as a water passage surface (17). The base plate of the exhaust device (16) is annular. The hole area of ​​the small water inlet is matched with the cross-sectional area of ​​the water pump inlet pipe (4).

2. The self-priming pump device for self-venting air according to claim 1, characterized in that, One end of the water inlet pipe of the water tank is connected to a low-level water source, and the other end is connected to the upper part of the sealed water tank (2).

3. The self-priming pump device for self-venting air according to claim 1, characterized in that, The water intake and exhaust pipe (3) has three small water inlet holes on its side, located at the top, middle and bottom of the water intake and exhaust pipe (3).

4. The self-priming pump device for self-venting air according to claim 1, characterized in that, The number of exhaust water supply pipes is two. The shorter one is located on the side near the water pump inlet (14) and its height is lower than the lower edge of the water pump inlet (14). The longer one is located on the opposite side of the shorter one and its height is higher than the upper edge of the water pump inlet (14).

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