Centrifugal pump anti-falling assembly and centrifugal pump

Abstract

The utility model belongs to the field of centrifugal pumps, particularly relates to a centrifugal pump anti-dropping assembly and a centrifugal pump, and aims to solve the problems that when an existing pump body stops pumping, liquid in a vertical pipeline is backwashed down, an impeller rotates reversely quickly, and the impeller is prone to being loosened, the following scheme is provided, the centrifugal pump anti-dropping assembly comprises a pump shell, and a connecting shaft is rotationally connected in the pump shell; an impeller is installed on the circumference of the connecting shaft, a key strip is arranged between the connecting shaft and the impeller, a cushion cap is arranged on one side of the impeller, one end of the connecting shaft is in threaded connection with a fixing bolt, and the cushion cap is located between the fixing bolt and the impeller. And meanwhile, the hexagonal fixing bolt can be inserted into the positioning sleeve on the splicing cap by utilizing the splicing cap, so that the movement of the fixing bolt is further avoided, the stability of the impeller and the fixing bolt is improved, and the safety and the stability of equipment use are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pumps, in particular to an anti-disengagement component for a centrifugal pump and a centrifugal pump. Background Art

[0002] A centrifugal pump refers to a pump that uses the centrifugal force generated by the rotation of an impeller to transport liquids. Before starting, the pump casing and the suction pipe must be filled with water, and then the motor is started, so that the pump shaft drives the impeller and the water to make a high-speed rotational motion. The water undergoes centrifugal motion, is thrown to the outer edge of the impeller, and flows into the pressure water pipeline of the water pump through the flow channel of the volute pump casing.

[0003] The impeller is the core part of the centrifugal pump. It rotates at a high speed and has a large output force. When the pump stops, the liquid in the vertical pipeline rushes down, causing the impeller to rotate rapidly in the reverse direction, which easily causes the impeller to become loose. For this reason, an anti-disengagement component for a centrifugal pump and a centrifugal pump are proposed. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problem in the prior art that when the pump stops, the liquid in the vertical pipeline rushes down, causing the impeller to rotate rapidly in the reverse direction, which easily causes the impeller to become loose, and to propose an anti-disengagement component for a centrifugal pump and a centrifugal pump.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] An anti-disengagement component for a centrifugal pump and a centrifugal pump, including a pump casing, a connecting shaft is rotatably connected in the pump casing, an impeller is installed on the circumference of the connecting shaft, a key is provided between the connecting shaft and the impeller, a cushion cap is provided on one side of the impeller, one end of the connecting shaft is threadedly connected with a fixing bolt, and the cushion cap is located between the fixing bolt and the impeller;

[0007] A positioning ring is fixedly connected to the circumference of the cushion cap, and a plurality of insertion rods are fixedly connected to one side of the positioning ring. A plurality of sleeves for cooperating with the insertion rods are fixedly connected to one side of the impeller.

[0008] As a further scheme of the utility model, a plurality of positioning grooves are opened on one side of the cushion cap, a split cap is provided on one side of the cushion cap, a plurality of positioning blocks for cooperating with the positioning grooves are fixedly connected to the circumferential outer wall of the split cap, a clamping groove is opened on the circumference of the cushion cap, a clamping spring is provided in the clamping groove, and a positioning sleeve for cooperating with the fixing bolt is fixedly connected to the inner wall of one end of the split cap.

[0009] As a further scheme of the utility model, a retaining ring is integrally formed on the circumferential outer wall of the split cap, and one side of the retaining ring is arranged as an arc surface.

[0010] As a further scheme of the utility model, a plurality of protective covers are fixedly connected to one side of the impeller, and the plurality of sleeves are respectively located inside the protective covers.

[0011] As a further solution of the present utility model, a support seat is fixedly connected to the bottom of the pump housing, and a plurality of through fixing holes are provided at the bottom of the support seat.

[0012] As a further solution of the present utility model, the end of the split cap is in the shape of a hollow hemisphere.

[0013] A centrifugal pump includes a centrifugal pump anti - detachment assembly.

[0014] In this application, during installation, first, the impeller is installed on the connecting shaft through a key, and then a cushion cap is sleeved on the connecting shaft. When sleeving, the insertion rods on the cushion cap are respectively inserted into the sleeves to keep the cushion cap stable. Then, the fixing bolts are fixed on the connecting shaft, and the cushion cap and the impeller are clamped by the fixing bolts. When the device is in use, the cooperation between the insertion rods and the sleeves is used to increase the stability of the cushion cap, thereby effectively avoiding the risk of loosening or detachment of the fixing bolts and the impeller, and improving the safety of use. Finally, the split cap is inserted on one side of the cushion cap. When inserting, the positioning block is aligned with the positioning groove, and at the same time, the hexagonal - headed fixing bolt is inserted into the positioning sleeve on the split cap. Subsequently, the snap ring is snapped into the card slot to fix the split cap, further preventing the movement of the fixing bolt.

[0015] In the present utility model, for the centrifugal pump anti - detachment assembly and the centrifugal pump, through the setting of installing the insertion rods on the cushion cap, when the cushion cap is installed, it can cooperate with the sleeves on the impeller, thereby increasing the stability of the cushion cap and effectively avoiding the risk of loosening or detachment of the fixing bolts and the impeller;

[0016] In the present utility model, for the centrifugal pump anti - detachment assembly and the centrifugal pump, through the setting of installing the split cap on one side of the cushion cap, the hexagonal - headed fixing bolt can be inserted into the positioning sleeve on the split cap by using the split cap, thereby fixing the split cap, further preventing the movement of the fixing bolt, improving the stability of the impeller and the fixing bolt, and enhancing the safety and stability of the device during use;

[0017] In the present utility model, when the cushion cap is installed, it can cooperate with the sleeves on the impeller, thereby increasing the stability of the cushion cap and effectively avoiding the risk of loosening or detachment of the fixing bolts and the impeller. At the same time, the hexagonal - headed fixing bolt can be inserted into the positioning sleeve on the split cap by using the split cap, thereby fixing the split cap, further preventing the movement of the fixing bolt, improving the stability of the impeller and the fixing bolt, and enhancing the safety and stability of the device during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three - dimensional structure schematic diagram of a centrifugal pump anti - detachment assembly proposed by the present utility model;

[0019] Figure 2 It is a cross - sectional structure schematic diagram of a centrifugal pump anti - detachment assembly proposed by the present utility model;

[0020] Figure 3 Schematic diagram of partial decomposition structure of an anti - detachment component of a centrifugal pump proposed by the present utility model;

[0021] Figure 4 An anti - detachment component of a centrifugal pump proposed by the present utility model Figure 3 Schematic diagram of enlarged structure at point A.

[0022] In the figure: 1, pump casing; 2, connecting shaft; 3, support seat; 4, impeller; 5, fixing bolt; 6, sleeve; 7, cushion cap; 8, positioning ring; 9, insertion rod; 10, positioning groove; 11, clamping groove; 12, split cap; 13, positioning block; 14, retaining ring; 15, positioning sleeve; 16, circlip; 17, protective cover. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0024] Embodiment 1: Refer to Figures 1 - 4 , an anti - detachment component of a centrifugal pump, including: a pump casing 1, a connecting shaft 2 is rotatably connected inside the pump casing 1, an impeller 4 is installed on the circumference of the connecting shaft 2, a key is provided between the connecting shaft 2 and the impeller 4, which facilitates the installation of the impeller 4 and enables the impeller 4 to rotate with the connecting shaft 2. A cushion cap 7 is provided on one side of the impeller 4, and a fixing bolt 5 is threadedly connected to one end of the connecting shaft 2. The cushion cap 7 is located between the fixing bolt 5 and the impeller 4, and the fixing bolt 5 is used to clamp and fix the impeller 4 and the cushion cap 7;

[0025] The circumference of the cushion cap 7 is fixedly connected with a positioning ring 8, and a plurality of insertion rods 9 are fixedly connected to one side of the positioning ring 8. A plurality of sleeves 6 that cooperate with the insertion rods 9 are fixedly connected to one side of the impeller 4. By providing the insertion rods 9 on the cushion cap 7, when the cushion cap 7 is installed, it can cooperate with the sleeves 6 on the impeller 4, thereby increasing the stability of the cushion cap 7 and effectively avoiding the risk of loosening or detachment of the fixing bolt 5 and the impeller 4.

[0026] A centrifugal pump includes the above - mentioned anti - detachment component of the centrifugal pump.

[0027] Embodiment 2: Refer to Figures 1 - 4 , based on the improvement of Embodiment 1:

[0028] Refer to Figure 4, a plurality of positioning grooves 10 are formed on one side of the cushion cap 7. A splicing cap 12 is provided on one side of the cushion cap 7. A plurality of positioning blocks 13 that cooperate with the positioning grooves 10 are fixedly connected to the circumferential outer wall of the splicing cap 12. A clamping groove 11 is formed on the circumference of the cushion cap 7. A snap spring 16 is arranged in the clamping groove 11. A positioning sleeve 15 that cooperates with the fixing bolt 5 is fixedly connected to the inner wall of one end of the splicing cap 12. Insert the splicing cap 12 on one side of the cushion cap 7. When inserting, align the positioning block 13 with the positioning groove 10. At the same time, insert the fixing bolt 5 with a hexagonal head into the positioning sleeve 15 on the splicing cap 12. Then snap the snap spring 16 into the clamping groove 11 to further fix the splicing cap 12 and further prevent the fixing bolt 5 from moving. The end of the splicing cap 12 is in the shape of a hollow hemisphere.

[0029] Refer to Figure 4 , an anti-ring 14 is integrally formed on the circumferential outer wall of the splicing cap 12. One side of the anti-ring 14 is arranged as an arc surface. The anti-ring 14 is used to protect the corners of the splicing cap 7 and reduce erosion. At the same time, the snap spring 16 is located on one side of the anti-ring 14.

[0030] Refer to Figure 4 , a plurality of protective covers 17 are fixedly connected to one side of the impeller 4. A plurality of sleeves 6 are respectively located inside the protective covers 17. The protective covers 17 protect the sleeves 6 and reduce erosion by the medium.

[0031] Refer to Figure 2 , a support seat 3 is fixedly connected to the bottom of the pump housing 1. A plurality of through fixing holes are provided at the bottom of the support seat 3. The support seat 3 is used to fix the pump housing 1.

[0032] The above is only the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and should be covered by the protection scope of the present utility model.

Claims

1. A centrifugal pump anti-drop assembly, comprising a pump housing (1), characterized in that: A connecting shaft (2) is rotatably connected inside the pump housing (1), an impeller (4) is mounted on the circumference of the connecting shaft (2), a key strip is provided between the connecting shaft (2) and the impeller (4), a gasket (7) is provided on one side of the impeller (4), a fixing bolt (5) is threadedly connected to one end of the connecting shaft (2), and the gasket (7) is located between the fixing bolt (5) and the impeller (4); A positioning ring (8) is fixedly connected to the circumference of the gasket cap (7), a plurality of insertion rods (9) are fixedly connected to one side of the positioning ring (8), and a plurality of sleeves (6) used in conjunction with the insertion rods (9) are fixedly connected to one side of the impeller (4).

2. The centrifugal pump anti-drop assembly according to claim 1, characterized in that: A plurality of positioning grooves (10) are formed on one side of the pad cap (7), a splicing cap (12) is formed on one side of the pad cap (7), a plurality of positioning blocks (13) used in conjunction with the positioning grooves (10) are fixedly connected to the circumferential outer wall of the splicing cap (12), a clamping groove (11) is formed on the circumference of the pad cap (7), a clamping spring (16) is provided in the clamping groove (11), and a positioning sleeve (15) used in conjunction with the fixing bolt (5) is fixedly connected to the inner wall of one end of the splicing cap (12).

3. The centrifugal pump anti-drop assembly according to claim 2, characterized in that: A retaining ring (14) is integrally formed on the circumferential outer wall of the assembled cap (12), and one side of the retaining ring (14) is provided with an arc surface.

4. The centrifugal pump anti-drop assembly according to claim 1, characterized in that: A plurality of protective covers (17) are fixedly connected to one side of the impeller (4), and the plurality of sleeves (6) are respectively located inside the protective covers (17).

5. The centrifugal pump anti-drop assembly according to claim 1, characterized in that: The bottom of the pump housing (1) is fixedly connected to a support seat (3), and the bottom of the support seat (3) is provided with a plurality of penetrating fixing holes.

6. The centrifugal pump anti-drop assembly according to claim 2, characterized in that: The end of the puzzle cap (12) is in the shape of a hollow hemisphere.

7. A centrifugal pump, characterized in that: It comprises a centrifugal pump anti-drop assembly as described in any one of claims 1 to 6.

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