KR100447505B1 - Pump - Google Patents

Abstract

The present invention relates to a pump used for drainage of groundwater, irrigation of agricultural water, and the like. The pump of the present invention comprises a filter means for filtering foreign matter in the pumped water, a central pumping chamber disposed downstream of the filter means and having a multi-stage impeller means arranged thereon, and an upper portion of the discharge chamber surrounding the pumping chamber. It consists of a casing in communication, a priming tank configured to communicate with the pumping chamber of the casing, a water level control means for controlling the flow rate of the pumping chamber by communicating the filter means and the priming tank, and a motor for rotating the impeller means, the filter The means includes a housing into which the pumped water flows; An inner cylinder mounted at the center of the housing and in communication with the level control means; A filter element for filtering the foreign substances in the water flowing through the housing and introducing the inner cylinder; A drain cock attached to the lower part of the inner cylinder is provided. According to the present invention, the foreign matter in the pumped water can be effectively filtered before entering the pumping chamber of the casing to prevent failure and shorten the life. And reliability can be greatly improved. In addition, the size is reduced by a simple structure and can be manufactured at a low price, the multi-stage impeller structure has the effect of greatly increasing the head and at the same time increase the transport distance.

Description

Pump {PUMP}

The present invention relates to a pump used for drainage of groundwater, irrigation of agricultural water, and more particularly, to a pump capable of improving efficiency and reliability by filtration of foreign substances and a simple structure.

As is well known, the pump is a device for transporting a fluid such as liquid or gas by the pressure action has been developed in various structures such as reciprocating pump, rotary pump, centrifugal pump, axial pump. The performance of the pump is expressed in terms of head and flow rate, and there are many types depending on the head, the flow rate and the type of liquid to be handled. Centrifugal pumps are mainly used for drainage of groundwater and irrigation of agricultural water, and pumps used for drainage and irrigation are also called pumps.

Looking at the configuration of the centrifugal pump as an example of a general pump, the centrifugal pump is a casing (inlet and outlet) for the inlet and outlet of the water is connected to each other by a flow path, so that the rotation of the casing flow path by the motor drive. One or more impellers are arranged. And downstream of the casing is configured a main tank (Main tank) for storing the pumped water. The impeller is rotated by the driving of the motor, and water is pumped through the inlet of the casing by the centrifugal force. The pumped water increases in pressure as it passes through the center of the impeller and is discharged through the flow path and outlet of the casing.

However, in the pump of the prior art, foreign matter such as sandstone contained in the pumped water flows into the flow path of the casing as it is, and is fixed to the wall of the flow path to block the flow path, thereby greatly lowering the head of the pump. There is a problem that causes deterioration. In particular, the sandstone is accompanied by a fatal problem that wears out components such as impeller to shorten the life, causing failure.

On the other hand, in the flow path of the pump, bubbles are generated by the evaporating air as the pressure is lowered, and the bubbles are generated in the cavitation (Cavitation) that is broken at the position where the pressure is increased. Cavitation causes noise, vibration and corrosion and reduces the efficiency of the impeller. Therefore, to prevent cavitation, the pump structure is improved to reduce the differential pressure in the flow path or install a sub-tank. I'm adjusting. However, in order to reduce the differential pressure of the flow path, the diameter of the flow path must be larger than the design value, and thus, the structure of the pump becomes complicated, the size increases, and the production cost increases. In particular, the sub tank has to be installed at a position higher than the flow path so as to maintain a constant level flow rate in the flow path of the pump, the size of the pump is excessively larger than necessary, which is cumbersome and inconvenient to install.

The present invention has been made to solve various problems of the prior art as described above, an object of the present invention is to provide a pump that can effectively prevent failure and shorten the life by filtering the foreign matter in the pumped water.

Another object of the present invention is to provide a pump that can effectively prevent cavitation by a simple structure to greatly improve efficiency and reliability, and to reduce size.

Another object of the present invention is to provide a pump that can greatly increase the head by the multi-stage impeller structure, effectively increasing the transport distance.

Features of the present invention for achieving the above object, the filter means for filtering the foreign matter in the pumped water; A casing disposed downstream of the filter means, the casing in which a central pumping chamber in which the multi-stage impeller means is disposed and an upper portion of the discharge chamber surrounding the pumping chamber communicate with each other; A priming tank configured to communicate with the pumping chamber of the casing; Water level control means for communicating the filter means and the priming tank to control the flow rate of the pumping chamber; A motor for rotating the impeller means, the filter means comprising: a housing into which water to be pumped is introduced; An inner cylinder mounted at the center of the housing and in communication with the level control means; A filter element for filtering foreign substances in water introduced through the housing to introduce the inner cylinder; In the pump including a drain cock mounted to the lower portion of the inner cylinder.

1 is a perspective view showing the appearance of a pump according to the present invention,

2 is a cross-sectional view showing the configuration of a pump according to the present invention;

3 is a plan view showing the configuration of a pump according to the present invention,

4 is a partially enlarged cross-sectional view for explaining the operation of the pump according to the present invention.

♣ Explanation of symbols for the main parts of the drawing ♣

10: main tank 20: filter unit

21: housing 23: inner cylinder

25: filter element 30: casing

31: pumping chamber 34: discharge chamber

40: sub tank 41: level control room

50: water level control means 52: vertical pipe

60: impeller device 61: drive shaft

62: first impeller 63: second impeller

64: third impeller 70: first inner casing

71: second inner casing 80: motor

Hereinafter, a preferred embodiment of the pump according to the present invention will be described in detail with reference to the accompanying drawings.

First, referring to Figures 1 and 2, the pump of the present invention is provided with a main tank 10 that can store the pumped water. The inlet 11 of the main tank 10 is connected to the outer surface close to the bottom of the main tank 10, the discharge port 12 is vertically connected through the upper surface of the main tank 10. The lower end of the discharge port 12 is disposed on the same horizontal plane as the inlet port 11 so as to smoothly pump water from the main tank 10. One side of the discharge port 12 is equipped with a check valve (13) to prevent the back flow of water, the pressure sensor 14 for measuring the pressure of the main tank 10 by a vacuum on the upper surface of the main tank (10) ) Is equipped.

1 to 3, a filter unit 20 for filtering foreign substances in water is connected to the discharge port 12 of the main tank 10. The housing 21 of the filter unit 20 has a lower body 21a attached to the upper surface of the main tank 10 and an upper body 21b assembled to be separated on the upper portion of the lower body 21a. Consists of And the discharge port 12 of the main tank 10 is connected to the outer surface of the lower body (21a). An inner cylinder 23 is formed integrally with the inner cylinder 23 which forms the flow passage 22 in the center of the lower body 21a, and the discharge port 24 is formed in the flow passage 22 of the inner cylinder 23. Is connected. The upper portion of the inner cylinder 23 is mounted with a cylindrical filter element (Filter element) (25) for filtering foreign matter in the water flowing into the housing 21 to flow into the flow path 22 of the inner cylinder (23). A drain cock 26 is attached to the lower portion of the inner cylinder 23 to remove foreign substances from the flow passage 22 and the filter element 25. When the upper body 21b is removed from the lower body 21a of the housing 21, the filter element 25 can be replaced.

1 to 4, the pump of the present invention is provided on the upper portion of the main tank 10 so as to be disposed downstream of the filter unit 20, the casing 30 constituting the appearance, the casing 30 ) Is composed of a casing body (30a) and the cap (30b) that can be separated up and down. The pumping chamber 31 is formed in the center of the casing 30, and the inlet 32 is formed in the lower part of the pumping chamber 31.

As shown in FIG. 2 and FIG. 4, the discharge chamber 34 is formed around the pumping chamber 31 by the cylindrical partition 33 surrounding the pumping chamber 31. The upper part of the pumping chamber 31 and the discharge chamber 34 communicate with each other by the flow path 35, and the lower part of the discharge chamber 34 so as to increase the soil output by the height difference with the flow path 35. The discharge port 36 is connected through the casing 30.

In addition, the outer side of the casing 30 is configured with a priming tank 40 for controlling the flow rate of the pumping chamber 31, the priming tank 40 is extended from the outer surface of the casing 30 The cover 40b is assembled to a rectangular flange 40a. The pumping chamber 31 of the casing 30 and the water level adjusting chamber 41 of the priming tank 40 communicate with each other by the lower flow passage 42. On the upper surface of the priming tank 40 is mounted a priming cock (Priming cock) 43 that can be opened and closed to supply water to the level control chamber (41).

2 to 4, the water level control means 50 is provided in the water level adjusting chamber 41 of the priming tank 40 to adjust the water level of the water level adjusting chamber 41 by the water supplied from the filter unit 20. Consists of. The water level control means 50 is connected to the discharge port 24 of the filter unit 20 by the connecting pipe 51 and the vertical pipe 52 extending vertically upward to the water level adjusting chamber 41 of the priming tank 40. Has The end 52a of the vertical pipe 52 is disposed to be close to the upper surface of the priming tank 40, and the vertical pipe 52 has a check valve 53 to prevent backflow to the filter unit 20. It is installed. The water pumped into the level control chamber 41 maintains the high water level because the end 52a of the vertical pipe 52 is positioned above the level control chamber 41.

2 and 4 again, the pumping chamber 31 of the casing 30 is provided with a multi-stage impeller device 60 for generating centrifugal force for pumping water. The impeller device 60 includes a drive shaft 61 mounted vertically in the center of the pumping chamber 31 and first to third impellers 62 to sequentially mounted upward from the lower part of the drive shaft 61. 64). The first impeller 62 and the second impeller 63 having the same structure discharge the water flowing into the central inlets 62a and 63a by centrifugal force to the radial outlets 62b and 63b. The third impeller 64 discharges and pumps the water flowing from the radial inlet 64a through the central passage 64b by centrifugal force, and the water passing through the central passage 64b passes through the diffusion tube 64c. As a result, the upper portion of the pumping chamber 31 is diffused. On the outer surface of the diffusion tube 64c, a plurality of holes 64d are formed in the radial direction so as to assist the diffusion of water.

In addition, each of the first and second impellers 62 and 63 of the impeller device 60 has cylindrical first and second inner casings 70 which divide the pumping chamber 31 of the casing 30 into multiple stages. Surrounded by 71, the first and second inner casings 70 and 71 are coupled up and down to form two stage pressure feeding chambers 70a and 71a. The inlet 62a of the first impeller 62 is disposed at the inlet 70b of the first inner casing 70, and the inlet 70b of the first inner casing 70 is the inlet (31) of the pumping chamber 31. 32). The inlet 63a of the second impeller 63 is disposed at the inlet 71b of the second inner casing 71, and the inlet 64a of the third impeller 64 is located above the second inner casing 71. Is arranged. In this embodiment, since the water level of the pumping chamber 31 and the water level adjusting chamber 41 controlled by the vertical pipe 52 of the water level control means 50 is close to the ends of the vertical pipe 52, the impeller device 60 The first and second impellers (62, 63) of) will be submerged.

Referring again to FIGS. 1 and 2, the pump of the present invention includes a motor 80 installed on the casing 30 to rotate the drive shaft 61 of the impeller device 60. The motor 80 is composed of a stator 81, a rotor 82 arranged to rotate inside the stator 81, and a motor shaft 83 fixed to the rotor 82. The motor shaft 83 is coupled to the upper end of the drive shaft 61 by a coupling 84. Since the configuration and operation of the stator 81 and the rotor 82 of the motor 80 is general, detailed description thereof will be omitted.

The operation of the pump according to the present invention having such a configuration will now be described.

2 and 4, during the initial operation of the pump, the user opens the priming cock 43 of the priming tank 40 and supplies the water called the parquet to the priming tank 40 to pump the pumping chamber of the casing 30. Priming is performed to fill the water with 31 and to start the pump. When the drive shaft 61 of the impeller device 60 is rotated by the driving of the motor 80, the first to third impellers 62 to 64 of the impeller device 60 are simultaneously rotated to generate centrifugal force. Pumping of water, such as groundwater, is started through the inlet port 11 of the main tank 10 by the centrifugal force caused by the rotation of the first to third impellers 62 to 64. Water from the main tank 10 is introduced into the housing 21 of the filter unit 20 through the discharge port 12 of the main tank 10, the water flowing into the housing 21 is filtered by the filter element 25 It flows into the flow path 22 of the inner cylinder 23 via the via. In this way, by filtering the foreign matter in the water flowing into the casing 30 of the pump by the filter element 25, it is possible to effectively prevent the failure and shorten the life of the pump can greatly improve the reliability.

In addition, the water discharged through the discharge port 24 of the filter unit 10 is supplied to the level control chamber 41 of the priming tank 40 through the connecting pipe 51 and the vertical pipe 52 of the water level control means 50. Supplied. At this time, since the end 52a of the vertical pipe 52 is close to the upper surface of the priming tank 40, the water level of the priming tank 40 is kept constant by the water discharged from the vertical pipe 52.

As shown in detail in FIG. 4, the water of the priming tank 40 is inlet 70b of the flow path 41 of the priming tank 40 and the first inner casing 70 by the centrifugal force of the first impeller 62. Is first pumped through Water flowing through the inlet 62a of the first impeller 62 is supplied to the pressure feeding chamber 70a of the first inner casing 70 through the outlet 62b. Subsequently, the water supplied to the pressure feeding chamber 70a of the first inner casing 70 is secondly pumped by the centrifugal force of the second impeller 63. Water passing from the pressure feeding chamber 70a of the first inner casing 70 to the inlet 71b of the second inner casing 71 is formed through the inlet 63a and the outlet 63b of the second impeller 63. It is supplied to the pressure feed chamber 71a of the two inner casing 71. The water supplied to the pressure feeding chamber 71a of the second inner casing 71 is pumped three times by the centrifugal force of the third impeller 64. Water passing through the inlet 64a and the central passage 64b of the third impeller 64 is diffused through the pumping chamber 31 as a whole through the diffusion pipe 64c. At this time, the hole 64d of the diffusion pipe 64c assists the diffusion of water to smooth the head.

The three-step pumping by the first to third impellers 62 to 64 of the impeller device 60 can greatly increase the head of the water. In addition, since the flow rate and pressure of the pumping chamber 31 are constantly controlled by the water supplied to the priming tank 40 through the vertical pipe 52 of the water level control means 50 during the pumping operation of the water, the pumping chamber 31 Cavitation caused by pressure fluctuations can be effectively prevented, which can reduce the efficiency caused by cavitation as well as prevent pump failure and shorten the life of the pump.

Meanwhile, water in the pumping chamber 31 flows into the discharge chamber 34 through the flow path 35, and the water in the discharge chamber 34 is discharged to the outside of the casing 30 through the discharge port 36. Since the discharge port 36 connected to the lower portion of the flow path 35 has a height difference with the flow path 35, the earth output of the water can be increased through the discharge port 36, and thus the discharge port 36 is discharged through the discharge port 36. Can be transported remotely. When the motor 80 is stopped and the first to third impellers 62 to 64 of the impeller device 60 are stopped, the main valve is mounted by the check valve 13 mounted on the discharge port 12 of the main tank 10. Backflow from the tank 10 is prevented. Therefore, the main tank 10 is stored a certain amount of water. In addition, since the backflow from the priming tank 40 is prevented by the check valve 53 attached to the vertical pipe 52 of the water level control means 50, the pumping chamber 31 and the priming tank of the casing 30 are prevented. 40 always stores a certain amount of water. In this case, the pump can be pumped by the magnetic force of the pump even without priming for operation of the pump, so that the pump can be easily operated for drainage of groundwater, irrigation of agricultural water, and the like.

The embodiments described above are merely to describe preferred embodiments of the present invention, the scope of the present invention is not limited to the described embodiments, those skilled in the art within the spirit and claims of the present invention It will be understood that various changes, modifications, or substitutions may be made thereto, and such embodiments are to be understood as being within the scope of the present invention.

As described above, according to the pump according to the present invention, foreign matter in the pumped water is filtered before entering the pumping chamber of the casing to effectively prevent failure and shorten the life, and the flow rate of the pumping chamber by the water level control means By controlling pressure effectively preventing cavitation, efficiency and reliability can be greatly improved. In addition, the size is reduced by a simple structure and can be manufactured at a low price, the multi-stage impeller structure has the effect of greatly increasing the head and at the same time increase the transport distance.

Claims (5)

Filter means for filtering foreign matter in the pumped water; A casing disposed downstream of the filter means, the casing in which a central pumping chamber in which the multi-stage impeller means is disposed and an upper portion of the discharge chamber surrounding the pumping chamber communicate with each other; A priming tank configured to communicate with the pumping chamber of the casing; Water level control means for communicating the filter means and the priming tank to control the flow rate of the pumping chamber; It is made of a motor for rotating the impeller means, The filter means includes a housing into which the pumped water flows; An inner cylinder mounted at the center of the housing and in communication with the level control means; A filter element for filtering foreign substances in water introduced through the housing to introduce the inner cylinder; And a drain cock mounted to the lower portion of the inner cylinder. delete The water level control means according to claim 1, A vertical tube having an end thereof positioned on an upper portion of the priming tank so that the impeller means may be flooded by adjusting the water level of the priming tank by communicating the filter means and the priming tank; And a check valve provided at an end of the vertical pipe so as to prevent backflow to the filter means. 4. The impeller according to claim 1 or 3, wherein the impeller means is composed of first to third impellers arranged in multiple stages from the lower part of the pumping chamber of the casing upwards. The pump is disposed in the pressure chamber of the first and second inner casing, the third impeller has a shape capable of diffusing water into the pumping chamber of the casing. The pump according to claim 1, wherein a discharge port is connected to a discharge chamber of the casing at a lower level than a flow path for communicating the pumping chamber and the discharge chamber, and the filter means is connected to a downstream main tank for storing water.