Single-stage double-suction centrifugal pump

Abstract

The utility model relates to the field of centrifugal pumps, in particular to a single-stage double-suction centrifugal pump. The centrifugal pump comprises a centrifugal pump body. One side of the centrifugal pump body is connected with a driving mechanism, and the two ends of the centrifugal pump body communicate with communicating pipes. And the filter plate is arranged on the inner wall of the communicating pipe and is used for filtering liquid passing through the centrifugal pump body. And the scraping component is arranged on the communicating pipe and is used for scraping impurities adhered to the filter plate in an up-and-down reciprocating manner. And the pushing piece is arranged in the communicating pipe and pushes the scraping assembly away from the filter plate when the scraping assembly performs the scraping action upwards. The scraping piece is driven by the telescopic mechanism to move up and down in a reciprocating manner, and the sliding block is always attached to the inner wall of the communicating pipe under the action of the spring, so that impurities adhered to the filter plate can be scraped by the scraping piece, and the impurities are prevented from being adhered to the filter plate under the impact of water flow, so that filter holes of the filter plate are blocked, and the service life of the filter plate is prolonged. The water flow entering the centrifugal pump body is reduced, and the working quality of the centrifugal pump body is reduced.

Description

Technical Field

[0001] The utility model relates to the field of centrifugal pumps, in particular to a single-stage double-suction centrifugal pump. Background Art

[0002] The most obvious feature of a single-stage double-suction centrifugal pump, also known as a single-stage double-suction split case pump, is that it has two suction ports, which usually allow it to have a larger flow rate. It is suitable for conveying clean water without solid particles or other liquids with physical and chemical properties similar to water.

[0003] The Chinese patent document with authorization announcement number CN220286066U proposes a high-lift and high-efficiency single-stage double-suction centrifugal pump, including a base, the top of the base is fixedly connected to a pump body, one side of the pump body is provided with a water inlet end, and the other side of the pump body is provided with a water outlet end, a filter element is clamped at the end of the water inlet end, and the filter element is fixed in the water inlet end by a clamping end, a servo motor is fixedly installed on the top of the base on the rear side of the pump body, a noise reduction cover is provided on the outside of the servo motor, and a sound absorbing panel is fixedly connected to the inner wall of the noise reduction cover.

[0004] In the above application, although the filter element is provided at the water inlet end to filter the water entering the water inlet end, remove the impurity particles in the water, and prevent the impurity particles from damaging the centrifugal pump, no device for scraping off the impurities is provided. The impurities will adhere to the surface of the filter element under the impact of the water flow, which may block the filter element, reduce the amount of water flow, and thus affect the operation of the centrifugal pump. Utility Model Content

[0005] In view of the problems existing in the background technology, a single-stage double-suction centrifugal pump is proposed.

[0006] The utility model proposes a single-stage double-suction centrifugal pump, including a centrifugal pump body. A driving mechanism is connected to one side of the centrifugal pump body, and connecting pipes are connected to both ends. A filter plate is arranged at the inner wall of the connecting pipe to filter the liquid passing through the centrifugal pump body. A scraping component is arranged on the connecting pipe to scrape off impurities adhered to the filter plate by reciprocating up and down. A pushing member is arranged in the connecting pipe to push the scraping component away from the filter plate when the scraping component performs a scraping action upward. And a material box is arranged at the lower end of the filter plate to collect the scraped impurities.

[0007] Preferably, the scraping assembly includes a telescopic mechanism, a scraping member for cleaning the filter plate, a connecting member connecting the telescopic mechanism and the scraping member, and a docking member for docking the scraping member with the pushing member.

[0008] Preferably, the scraping member includes a scraping block; sliding grooves are provided at both ends of the scraping block; sliding blocks are slidably connected in the two sliding grooves; a spring is connected between the bottom of the sliding groove and the corresponding sliding block; bristles are provided on the scraping block and the two sliding blocks on one side facing the filter plate.

[0009] Preferably, one end of the two sliding blocks close to the inner wall of the connecting pipe is arc-shaped.

[0010] Preferably, the telescopic mechanism is arranged at the top end of the connecting pipe, and its telescopic end passes through the connecting pipe; the connecting piece includes a sliding rod connected to the telescopic end of the telescopic mechanism on the side away from the filter plate; the other end of the sliding rod is connected to a limiting plate, on which a connecting frame is also slidably connected; the other end of the connecting frame is connected to the scraper block.

[0011] Preferably, the docking member comprises a clamping plate connected to the lower end of the scraping block; a clamping groove is provided between the clamping plate and the scraping block; and an adjusting arc surface is provided at one end of the clamping plate facing the filter plate.

[0012] Preferably, the pushing member is arranged between the docking member and the filter plate; the pushing member includes sliding grooves opened on both sides of the connecting pipe; sliding sleeves are slidably connected in the two sliding grooves; the two sliding sleeves are opened at opposite ends, and sliding plates are slidably connected at the openings; the two sliding sleeves and the sliding plates are both engaged with the snap-in grooves, and the end facing the docking member is provided with an adjusting arc surface 2 that cooperates with the snap-in plate.

[0013] Preferably, the material discharge box is connected to the lower end of the connecting pipe, and the lower end of the material discharge box is connected to a material collecting barrel; the material collecting barrel is threadedly connected to the material discharge box.

[0014] Compared with the prior art, the utility model has the following beneficial technical effects:

[0015] (1) The single-stage double-suction centrifugal pump drives the scraper to move up and down reciprocatingly through the telescopic mechanism. The sliding block is always in contact with the inner wall of the connecting pipe under the action of the spring, so that the scraper can scrape off the impurities adhering to the filter plate and prevent the impurities from adhering to the filter plate under the impact of the water flow, thereby blocking the filter holes of the filter plate, reducing the water flow entering the centrifugal pump body, and reducing the working quality of the centrifugal pump body.

[0016] (2) The single-stage double-suction centrifugal pump can cooperate with each other through the connection parts, the docking parts and the pushing parts. When the scraper moves downward to clean the filter plate, the scraper can always be in contact with the filter plate under the impact of the water flow; when the scraper moves upward, the scraper can be pushed away from the filter plate to prevent impurities from being pushed to the top of the scraper and unable to fall into the discharge box, thereby preventing them from being discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the connecting pipe of the utility model;

[0019] Figure 3 This is a cross-sectional view of the internal structure of the connecting pipe of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the scraping component of the utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the scraping member of the utility model;

[0022] Figure 6 It is a schematic diagram of the structure of the scraping member and the pushing member of the utility model.

[0023] Figure numerals: 1. centrifugal pump body; 2. driving mechanism; 3. connecting pipe; 4. filter plate; 5. scraper assembly; 51. telescopic mechanism; 52. connecting piece; 521. slide rod; 522. limit plate; 523. connecting frame; 53. scraper; 531. scraper block; 532. sliding groove; 533. sliding block; 534. spring; 535. bristles; 54. docking piece; 541. snap-in plate; 542. snap-in groove; 6. pushing piece; 61. slide groove; 62. sliding sleeve; 63. sliding plate; 7. discharge box; 8. collecting barrel. DETAILED DESCRIPTION

[0024] Embodiment 1

[0025] like Figure 1-6 As shown, a single-stage double-suction centrifugal pump proposed by the utility model includes a centrifugal pump body 1, a filter plate 4, a scraping assembly 5, a pusher 6 and a material box 7. A driving mechanism 2 is connected to one side of the centrifugal pump body 1, and a connecting pipe 3 is connected to both ends; the driving mechanism 2 is a motor. The filter plate 4 is arranged at the inner wall of the connecting pipe 3 to filter the liquid passing through the centrifugal pump body 1. The filter plate 4 is arranged at the liquid inlet end of the connecting pipe 3, which can intercept impurities in the water flow to prevent impurities from entering the centrifugal pump body 1 and hitting the impeller arranged in the centrifugal pump body 1, causing wear of the impeller and even affecting the operation of the impeller. The scraping assembly 5 is arranged on the connecting pipe 3, and the impurities adhered to the filter plate 4 are scraped off by reciprocating up and down. The pusher 6 is arranged in the connecting pipe 3, and the scraping assembly 5 is pushed away from the filter plate 4 when the scraping assembly 5 performs a scraping action upward. The material box 7 is arranged at the lower end of the filter plate 4 to collect the scraped impurities.

[0026] To further explain, the scraping assembly 5 includes a telescopic mechanism 51, a scraping member 53 for cleaning the filter plate 4, a connecting member 52 connecting the telescopic mechanism 51 and the scraping member 53, and a docking member 54 for docking the scraping member 53 with the pushing member 6; the telescopic mechanism 51 is a cylinder, and a sealing ring is provided between its telescopic end and the connecting pipe 3.

[0027] Further explanation, the scraper 53 includes a scraper block 531; both ends of the scraper block 531 are provided with a sliding groove 532; the two sliding grooves 532 are slidably connected with a sliding block 533; a spring 534 is connected between the bottom of the sliding groove 532 and the corresponding sliding block 533; the scraper block 531 and the two sliding blocks 533 are provided with bristles 535 on the side facing the filter plate 4. In the process of the scraper 53 moving up and down, the sliding block 533 can always fit with the inner wall of the connecting pipe 3 under the action of the spring 534, so that the scraper 53 can adapt to the circular connecting pipe 3 and the filter plate 4, so that the scraper 53 can scrape off the impurities adhered to the filter plate 4. Prevent impurities from adhering to the filter plate 4 under the impact of the water flow, thereby blocking the filter holes of the filter plate 4, reducing the water flow entering the centrifugal pump body 1, and reducing the working quality of the centrifugal pump body 1.

[0028] Further, the ends of the two sliding blocks 533 close to the inner wall of the connecting pipe 3 are both arc-shaped, so that the sliding blocks 533 can be well fitted with the inner wall of the connecting pipe 3, and the dead corners where the sliding blocks 533 cannot extend are prevented, resulting in incomplete cleaning of the filter plate 4.

[0029] Embodiment 2

[0030] like Figure 3 , 4 As shown in Figures 6 and 7 , the utility model proposes a single-stage double-suction centrifugal pump. Compared with the first embodiment, this embodiment further includes: a telescopic mechanism 51 is arranged at the top of the connecting pipe 3, and its telescopic end penetrates the connecting pipe 3; the connecting member 52 includes a slide bar 521 connected to the telescopic end of the telescopic mechanism 51 away from the filter plate 4; the other end of the slide bar 521 is connected to a limit plate 522, on which a connecting frame 523 is also slidably connected; the other end of the connecting frame 523 is connected to a scraping block 531. The scraping member 53 can slide along the slide bar 521.

[0031] Further explanation, the docking member 54 includes a clamping plate 541 connected to the lower end of the scraping block 531; a clamping groove 542 is provided between the clamping plate 541 and the scraping block 531; and an adjustment arc surface 1 is provided at one end of the clamping plate 541 facing the filter plate 4. The pusher 6 is arranged between the docking member 54 and the filter plate 4; the pusher 6 includes a slide groove 61 provided on both sides of the connecting pipe 3; sliding sleeves 62 are slidably connected in both slide grooves 61; the opposite ends of the two sliding sleeves 62 are open, and a sliding plate 63 is slidably connected at the opening; the two sliding sleeves 62 and the sliding plate 63 are both engaged with the clamping groove 542, and the ends facing the docking member 54 are both provided with an adjustment arc surface 2 that cooperates with the clamping plate 541. The connecting member 52, the docking member 54 and the pushing member 6 can cooperate with each other. When the scraping member 53 moves downward to clean the filter plate 4, the scraping member 53 can always be in contact with the filter plate 4 under the impact of the water flow; when the scraping member 53 moves upward, the scraping member 53 can be pushed away from the filter plate 4 to prevent impurities from being pushed to the top of the scraping member 53 and unable to fall into the discharge box 7, thereby preventing them from being discharged.

[0032] Further explanation, the material box 7 is connected to the lower end of the connecting pipe 3, and the lower end of the material box 7 is connected to the collecting barrel 8; the collecting barrel 8 is threadedly connected to the material box 7. After the centrifugal pump body 1 finishes working, the collecting barrel 8 can be screwed out, and the impurities and residual water in the collecting barrel 8 can be poured out.

[0033] The working principle of the utility model is as follows: when working, the centrifugal pump body 1 starts working first, and then the telescopic mechanism 51 is started to drive the scraper 53 to move up and down, so that the scraper 53 can scrape off the impurities adhering to the filter plate 4, and make the impurities fall into the collecting barrel 8 along the material box 7 for collection. During the movement of the scraper 53, the sliding block 533 is always in contact with the inner wall of the connecting pipe 3 under the action of the spring 534, so as to prevent the existence of a dead corner where the sliding block 533 cannot extend, resulting in insufficient cleaning of the filter plate 4. When the scraper 53 moves downward, the clamping plate 541 drives the sliding sleeve 62 and the sliding plate 63 to slide downward along the slide groove 61 until the sliding sleeve 62 and the sliding plate 63 slide to the bottom of the slide groove 61. At this time, the scraper 53 continues to move downward, and the adjustment arc surface 1 on the clamping plate 541 abuts against the adjustment arc surface 2 on the sliding sleeve 62 and the sliding plate 63, and pushes the scraper 53 away from the filter plate 4 along the slide rod 521, so that the sliding sleeve 62 and the sliding plate 63 are clamped into the clamping groove 542. At this time, the telescopic mechanism 51 drives the scraper 53 to move upward, thereby driving the sliding sleeve 62 and the sliding plate 63 to slide upward. When the sliding sleeve 62 and the sliding plate 63 slide to the top of the sliding groove 61, the scraper 53 continues to move upward, so that the scraper 53 moves away from the filter plate 4 along the sliding rod 521. After the sliding sleeve 62 and the sliding plate 63 are separated from the clamping groove 542, the scraper 53 will be attached to the surface of the filter plate 4 under the impact of the water flow. At this time, the telescopic mechanism 51 drives the scraper 53 to move downward again, and the clamping plate 541 will abut against the upper surface of the sliding sleeve 62 and the sliding plate 63, and push the sliding sleeve 62 and the sliding plate 63 downward, and repeat the above process.

[0034] The implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A single-stage double-suction centrifugal pump, characterized in that: include A centrifugal pump body (1); one side of the centrifugal pump body (1) is connected to a driving mechanism (2), and both ends are connected to a connecting pipe (3); A filter plate (4) is arranged on the inner wall of the connecting pipe (3) and filters the liquid passing through the centrifugal pump body (1); A scraping assembly (5) is arranged on the connecting pipe (3) and scrapes off impurities adhering to the filter plate (4) by reciprocating up and down; A pushing member (6) is arranged in the connecting pipe (3) and pushes the scraping assembly (5) away from the filter plate (4) when the scraping assembly (5) performs a scraping action upward; And a material discharge box (7) is arranged at the lower end of the filter plate (4) and collects the scraped impurities.

2. A single-stage double-suction centrifugal pump according to claim 1, characterized in that: The scraping assembly (5) comprises a telescopic mechanism (51), a scraping member (53) for cleaning the filter plate (4), a connecting member (52) for connecting the telescopic mechanism (51) and the scraping member (53), and a docking member (54) for docking the scraping member (53) with the pushing member (6).

3. A single-stage double-suction centrifugal pump according to claim 2, characterized in that: The scraping member (53) comprises a scraping block (531); sliding grooves (532) are provided at both ends of the scraping block (531); sliding blocks (533) are slidably connected in the two sliding grooves (532); a spring (534) is connected between the bottom of the sliding groove (532) and the corresponding sliding block (533); and bristles (535) are provided on the side of the scraping block (531) and the two sliding blocks (533) facing the filter plate (4).

4. A single-stage double-suction centrifugal pump according to claim 3, characterized in that: One end of the two sliding blocks (533) close to the inner wall of the connecting pipe (3) is arc-shaped.

5. A single-stage double-suction centrifugal pump according to claim 3, characterized in that: The telescopic mechanism (51) is arranged at the top end of the connecting pipe (3), and its telescopic end penetrates the connecting pipe (3); the connecting member (52) comprises a sliding rod (521) connected to the telescopic end of the telescopic mechanism (51) on the side facing away from the filter plate (4); the other end of the sliding rod (521) is connected to a limiting plate (522), on which a connecting frame (523) is also slidably connected; the other end of the connecting frame (523) is connected to a scraping block (531).

6. A single-stage double-suction centrifugal pump according to claim 5, characterized in that: The docking member (54) comprises a clamping plate (541) connected to the lower end of the scraping block (531); a clamping groove (542) is provided between the clamping plate (541) and the scraping block (531); and an adjustment arc surface 1 is provided at one end of the clamping plate (541) facing the filter plate (4).

7. A single-stage double-suction centrifugal pump according to claim 6, characterized in that: The pushing member (6) is arranged between the docking member (54) and the filter plate (4); the pushing member (6) comprises sliding grooves (61) provided on both sides of the connecting pipe (3); sliding sleeves (62) are slidably connected in the two sliding grooves (61); the two sliding sleeves (62) have openings at opposite ends, and a sliding plate (63) is slidably connected at the openings; the two sliding sleeves (62) and the sliding plate (63) are both engaged with the engaging grooves (542), and the ends facing the docking member (54) are both provided with an adjusting arc surface 2 engaged with the engaging plate (541).

8. A single-stage double-suction centrifugal pump according to claim 1, characterized in that: The material discharge box (7) is connected to the lower end of the connecting pipe (3), and the lower end of the material discharge box (7) is connected to a material collecting barrel (8); the material collecting barrel (8) is threadedly connected to the material discharge box (7).

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