Multi-stage self-suction centrifugal pump

Abstract

The utility model relates to the field of centrifugal pumps, and discloses a multistage self-suction centrifugal pump which comprises a pump body, a water inlet pipe is arranged on the left surface of the pump body, a water outlet pipe is arranged on the right surface of the pump body, a filtering mechanism is arranged in the water inlet pipe, and the filtering mechanism comprises a filtering assembly and a quick release assembly. A buffer assembly is arranged in the water inlet pipe, the filter assembly comprises a slot, a mounting ring is inserted into the inner wall of the slot, a filter screen is slidably connected to the inner wall of the top end of the mounting ring, the quick release assembly comprises a sealing plate, and a positioning block is elastically connected to the inner wall of the sealing plate through a compression spring. According to the utility model, the filter assembly is arranged in the water inlet pipe, so that the filter screen can block impurities in water flow. In an agricultural irrigation scene, impurities can be prevented from entering equipment such as a nozzle and a drip irrigation pipe, blockage is avoided, irrigation uniformity is guaranteed, and the yield and quality of crops are improved.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pumps, and in particular to a multi-stage self-priming centrifugal pump. Background Technology

[0002] A multistage self-priming centrifugal pump is a pump with multiple impellers that can provide high head for liquid transport. Multistage self-priming centrifugal pumps are not only suitable for conventional water transport, but also self-priming, eliminating the need for additional priming water during startup.

[0003] With the acceleration of industrial modernization and the innovation of agricultural irrigation technology, more stringent requirements have been placed on the performance of multi-stage self-priming centrifugal pumps, and traditional multi-stage self-priming centrifugal pumps have gradually exposed a series of problems in practical applications.

[0004] In agricultural irrigation, water sources often contain impurities such as silt, weeds, and insects. When using conventional multi-stage self-priming centrifugal pumps for irrigation, these impurities can clog sprinkler heads, drip irrigation pipes, and other equipment, resulting in uneven irrigation and affecting crop growth and yield.

[0005] Therefore, a multi-stage self-priming centrifugal pump is proposed to solve the above problems. Utility Model Content

[0006] To overcome the above shortcomings, this utility model provides a multi-stage self-priming centrifugal pump, which aims to improve the situation in the prior art where impurities in the water flow clog irrigation equipment such as nozzles and drip irrigation pipes, resulting in uneven irrigation and affecting crop yield.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a multi-stage self-priming centrifugal pump, including a pump body, an inlet pipe provided on the left surface of the pump body, an outlet pipe provided on the right surface of the pump body, a filter mechanism provided inside the inlet pipe, the filter mechanism including a filter component and a quick-release component, and a buffer component provided inside the inlet pipe;

[0008] The filter assembly includes a slot, an installation ring is inserted into the inner wall of the slot, a filter screen is slidably connected to the inner wall of the top of the installation ring, the quick-release assembly includes a sealing plate, a positioning block is elastically connected to the inner wall of the sealing plate by a compression spring, a locking block is fixedly connected to the front surface of the positioning block, and a locking groove is opened on the inner wall of the front side of the water inlet pipe.

[0009] As a further description of the above technical solution:

[0010] The slot is formed on the inner wall of the water inlet pipe, and the slot penetrates the lower surface of the water inlet pipe. The outer wall of the filter screen fits into the inner wall of the mounting ring.

[0011] As a further description of the above technical solution:

[0012] The sealing plate is slidably connected to the inner wall of the water inlet pipe. The upper surface of the sealing plate is made of rubber. The upper surface of the sealing plate and the lower surface of the mounting ring are in contact. The locking block is inserted into the inner wall of the slot.

[0013] As a further description of the above technical solution:

[0014] One end of the compression spring is fixedly connected to the inner wall of the rear side of the sealing plate, and the other end of the compression spring is fixedly connected to the rear surface of the positioning block. The positioning block is slidably connected to the inner wall of the sealing plate.

[0015] As a further description of the above technical solution:

[0016] The buffer assembly includes a sleeve with a cavity in its inner wall. A sealing gasket is elastically connected to the inner wall of the sleeve via a connecting spring. A sliding rod is fixedly connected to the left surface of the sealing gasket, and a circular hole is formed on the left surface of the sealing gasket.

[0017] As a further description of the above technical solution:

[0018] The right surface of the sleeve is fixedly connected to the inner wall on the right side of the mounting ring.

[0019] As a further description of the above technical solution:

[0020] The left surface of the slide rod is fixedly connected to the right surface of the filter screen, and the slide rod passes through and is connected to the left surface of the sleeve by a piston.

[0021] As a further description of the above technical solution:

[0022] The sealing gasket piston is connected to the inner wall of the cavity, one end of the connecting spring is fixedly connected to the right surface of the sealing gasket, and the other end of the connecting spring is fixedly connected to the inner wall of the right side of the sleeve.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, a filter assembly is installed inside the water inlet pipe, enabling the filter screen to block impurities in the water flow. In agricultural irrigation scenarios, this prevents impurities from entering sprinkler heads, drip irrigation pipes, and other equipment, avoiding blockages, ensuring irrigation uniformity, and improving crop yield and quality.

[0025] 2. In this utility model, the quick-release component design makes filter cleaning simple and fast. Simply move the positioning block backward to release the sealing plate's restriction on the mounting ring, allowing the mounting ring to be easily removed for convenient cleaning of the filter and impurities, ensuring the device's convenience.

[0026] 3. In this utility model, the buffer component can effectively reduce the impact of water flow and impurities, protect the filter screen from damage, and reduce the impact of water flow on the pump body, thus ensuring the stability and service life of the device. Attached Figure Description

[0027] Figure 1 This is a front view of the three-dimensional structure of the overall device in this utility model;

[0028] Figure 2 This is a three-dimensional sectional view of the water inlet pipe and the mounting ring in this utility model.

[0029] Figure 3 This is a three-dimensional cross-sectional view of the mounting ring in this utility model;

[0030] Figure 4 This is a three-dimensional cross-sectional view of the sleeve in this utility model;

[0031] Figure 5 This is a three-dimensional cross-sectional view of the water inlet pipe in this utility model.

[0032] Legend:

[0033] 1. Pump body; 2. Inlet pipe; 3. Outlet pipe; 41. Mounting ring; 42. Filter screen; 401. Slot; 51. Sealing plate; 52. Positioning block; 53. Compression spring; 54. Locking block; 501. Locking groove; 61. Sleeve; 62. Slide rod; 63. Sealing gasket; 64. Connecting spring; 601. Round hole; 602. Cavity. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] Reference Figure 1 - Figure 3This utility model provides an embodiment of a multi-stage self-priming centrifugal pump, including a pump body 1. The pump body 1 is the main body of a multi-stage self-priming centrifugal pump, which is existing technology and can be implemented by those skilled in the art. Since it is existing technology, it will not be described in detail in this case. An inlet pipe 2 is provided on the left surface of the pump body 1, and an outlet pipe 3 is provided on the right surface of the pump body 1. Both the inlet pipe 2 and the outlet pipe 3 are connected to external pipes. Water is drawn in through the inlet pipe 2 and discharged through the outlet pipe 3. A filter mechanism is provided inside the inlet pipe 2, which can remove impurities from the water. The system employs filtration to prevent impurities from clogging sprinklers, drip irrigation pipes, and other equipment during irrigation, thus affecting irrigation efficiency. The filtration mechanism includes a filter assembly and a quick-release assembly. The inlet pipe 2 is equipped with a buffer assembly, which effectively reduces the impact of water flow and impurities, ensuring the service life of the filter screen 42. The filter assembly includes a slot 401, with an installation ring 41 inserted into the inner wall of the slot 401. The filter screen 42 is slidably connected to the inner wall of the top of the installation ring 41. The surface of the filter screen 42 has multiple sets of mesh holes. The filter screen 42 is used to block impurities, while water can pass through the mesh holes for irrigation.

[0036] Reference Figure 1 , Figure 2 , Figure 5 The quick-release assembly includes a sealing plate 51, which is arc-shaped. The inner wall of the sealing plate 51 is elastically connected to a positioning block 52 by a compression spring 53. The bottom end of the positioning block 52 is a pull ring for easy pulling. A locking block 54 is fixedly connected to the front surface of the positioning block 52. A slot 501 is provided on the inner wall of the front side of the water inlet pipe 2. There are two sets of slots 501, which are evenly distributed laterally. The locking block 54 and the slot 501 fit together.

[0037] Reference Figure 1 - Figure 3 The slot 401 is opened on the inner wall of the water inlet pipe 2 and penetrates the lower surface of the water inlet pipe 2. The outer wall of the filter screen 42 fits the inner wall of the mounting ring 41, and the outer wall of the mounting ring 41 fits the inner wall of the slot 401. The mounting ring 41 can be inserted into the slot 401 from the lower surface of the water inlet pipe 2.

[0038] Reference Figure 1 , Figure 2 , Figure 5The sealing plate 51 is slidably connected to the inner wall of the water inlet pipe 2 and moves laterally. The upper surface of the sealing plate 51 is made of rubber to maintain a seal. The upper surface of the sealing plate 51 and the lower surface of the mounting ring 41 are in contact to prevent water leakage. The locking block 54 is inserted into the inner wall of the locking groove 501. One end of the compression spring 53 is fixedly connected to the inner wall of the rear side of the sealing plate 51, and the other end of the compression spring 53 is fixedly connected to the rear surface of the positioning block 52. When the positioning block 52 moves backward, it will squeeze the compression spring 53 to generate a reaction force. The positioning block 52 is slidably connected to the inner wall of the sealing plate 51 and moves in the front-back direction.

[0039] Reference Figure 2 - Figure 4 The buffer assembly includes a sleeve 61, which is sealed inside. A cavity 602 is formed in the inner wall of the sleeve 61. The cavity 602 consists of two parts, both of which are cylindrical. The diameter of the cylinder on the left is smaller than that of the cylinder on the right. A sealing gasket 63 is elastically connected to the inner wall of the sleeve 61 by a connecting spring 64. The sealing gasket 63 is made of rubber and can maintain a seal. A sliding rod 62 is fixedly connected to the left surface of the sealing gasket 63. The sealing gasket 63 and the sliding rod 62 move synchronously. A circular hole 601 is formed on the left surface of the sealing gasket 63. The diameter of the circular hole 601 is small, which restricts the flow rate of the fluid and can reduce the impact to achieve a buffering effect. The cavity 602 is filled with hydraulic oil, and neither of the two parts in the cavity 602 will block the circular hole 601. The smaller diameter cylinder will block the sealing gasket 63.

[0040] Reference Figure 2 - Figure 4 The right surface of the sleeve 61 is fixedly connected to the inner wall of the right side of the mounting ring 41. The left surface of the slide rod 62 is fixedly connected to the right surface of the filter screen 42. The slide rod 62 passes through and is connected to the left surface of the sleeve 61 by a piston to maintain a seal. The sealing gasket 63 is connected to the inner wall of the cavity 602 by a piston. One end of the connecting spring 64 is fixedly connected to the right surface of the sealing gasket 63, and the other end of the connecting spring 64 is fixedly connected to the inner wall of the right side of the sleeve 61. The sealing gasket 63 and the slide rod 62 will move synchronously. When the sealing gasket 63 moves to the right, it will squeeze the connecting spring 64 to generate a reaction force, and the hydraulic oil in the cavity 602 will also be squeezed. The hydraulic oil will pass through the round hole 601.

[0041] Working principle: When using this device, start the pump body 1 to draw water in from the inlet pipe 2 and discharge it from the outlet pipe 3 for irrigation.

[0042] When water flows through the inlet pipe 2, it passes through the filter screen 42. Impurities in the water flow are blocked and deposited by the filter screen 42. The impact force generated by the water flow and impurities under the influence of inertia will push the filter screen 42 to the right. The rightward movement of the filter screen 42 will drive the slide rod 62 and the sealing gasket 63 to the right. The rightward movement of the sealing gasket 63 will squeeze the hydraulic oil in the cavity 602. The hydraulic oil will pass through the round hole 601. Since the diameter of the round hole 601 is small, it will limit the flow rate, so it can achieve a damping effect and play a buffering role. In addition, the rightward movement of the sealing gasket 63 will also squeeze the connecting spring 64 to generate a reaction force. The reaction force of the connecting spring 64 can further improve the buffering effect and help the device to reset when it is stationary. The pumped water flow is not completely continuous, and the impact force and suction force of the water flow are related.

[0043] When the device is finished using, the positioning block 52 can be moved backward. The backward movement of the positioning block 52 will cause the locking block 54 to move backward. The backward movement of the locking block 54 will disengage from the locking groove 501 and release the restriction on the sealing plate 51. The backward movement of the positioning block 52 will also squeeze the compression spring 53 to generate a reaction force. After the restriction on the sealing plate 51 is released, the sealing plate 51 is moved to the left to release the obstruction on the mounting ring 41. Then the mounting ring 41 is removed, and the surface of the filter screen 42 and the impurities deposited in the water inlet pipe 2 are cleaned.

[0044] After cleaning, insert the mounting ring 41 into the slot 401 and move the sealing plate 51 to the right so that the locking block 54 and the right-side slot 501 are aligned. When aligned, the compression spring 53 will push the positioning block 52 and the locking block 54 forward. The forward-moving locking block 54 will engage with the slot 501 to limit the sealing plate 51. At this time, the sealing plate 51 will be in close contact with the surface of the mounting ring 41 to maintain a seal. The device can then be used normally.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-stage self-priming centrifugal pump, comprising a pump body (1), wherein an inlet pipe (2) is provided on the left surface of the pump body (1), and an outlet pipe (3) is provided on the right surface of the pump body (1), wherein a filter mechanism is provided inside the inlet pipe (2), characterized in that: The filtration mechanism includes a filtration component and a quick-release component, and a buffer component is provided inside the water inlet pipe (2); The filter assembly includes a slot (401), an installation ring (41) is inserted into the inner wall of the slot (401), a filter screen (42) is slidably connected to the inner wall of the top of the installation ring (41), the quick-release assembly includes a sealing plate (51), a positioning block (52) is elastically connected to the inner wall of the sealing plate (51) by a compression spring (53), a locking block (54) is fixedly connected to the front surface of the positioning block (52), and a locking groove (501) is opened on the inner wall of the front side of the water inlet pipe (2).

2. The multi-stage self-priming centrifugal pump according to claim 1, characterized in that: The slot (401) is opened on the inner wall of the water inlet pipe (2), the slot (401) penetrates the lower surface of the water inlet pipe (2), and the outer wall of the filter screen (42) and the inner wall of the mounting ring (41) are attached.

3. The multi-stage self-priming centrifugal pump according to claim 1, characterized in that: The sealing plate (51) is slidably connected to the inner wall of the water inlet pipe (2). The upper surface of the sealing plate (51) is made of rubber. The upper surface of the sealing plate (51) and the lower surface of the mounting ring (41) are attached. The card block (54) is inserted into the inner wall of the card slot (501).

4. The multi-stage self-priming centrifugal pump according to claim 1, characterized in that: One end of the compression spring (53) is fixedly connected to the inner wall of the rear side of the sealing plate (51), and the other end of the compression spring (53) is fixedly connected to the rear surface of the positioning block (52). The positioning block (52) is slidably connected to the inner wall of the sealing plate (51).

5. The multi-stage self-priming centrifugal pump according to claim 1, characterized in that: The buffer assembly includes a sleeve (61), the inner wall of which has a cavity (602), and the inner wall of the sleeve (61) is elastically connected to a sealing gasket (63) by a connecting spring (64). A slide rod (62) is fixedly connected to the left surface of the sealing gasket (63), and a round hole (601) is opened on the left surface of the sealing gasket (63).

6. The multi-stage self-priming centrifugal pump according to claim 5, characterized in that: The right surface of the sleeve (61) is fixedly connected to the inner wall on the right side of the mounting ring (41).

7. The multi-stage self-priming centrifugal pump according to claim 5, characterized in that: The left surface of the slide rod (62) is fixedly connected to the right surface of the filter screen (42), and the slide rod (62) passes through and is piston-connected to the left surface of the sleeve (61).

8. The multi-stage self-priming centrifugal pump according to claim 5, characterized in that: The sealing gasket (63) is piston-connected to the inner wall of the cavity (602), one end of the connecting spring (64) is fixedly connected to the right surface of the sealing gasket (63), and the other end of the connecting spring (64) is fixedly connected to the inner wall on the right side of the sleeve (61).

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