Anti-blocking and anti-collision forced circulation pump

Abstract

The invention belongs to the technical field of workpiece machining, and particularly relates to an anti-blocking and anti-collision forced circulation pump which comprises a pump body, an extension cavity is formed in the pump body, the cross section of the extension cavity is circular, one end of the extension cavity communicates with the interior of the pump body, and the end, away from an impeller, of a rotating shaft of the impeller of the pump body coaxially penetrates through the extension cavity and extends out of the pump body. A sealing piece matched with the rotating shaft is arranged at the end, away from the impeller, of the extending cavity, blades are fixedly arranged on the rotating shaft in the extending cavity in the radial direction, and a liquid inlet switch is arranged on the sealing piece; according to the anti-blocking and anti-collision forced circulation pump, the impeller is arranged on the rotating shaft of the impeller of the pump body and located in the pump body, particles can be prevented from running to the periphery of a sealing piece to collide the sealing piece, and crystals or other solid particles are prevented from depositing around the sealing piece to block the sealing piece; the problems of mechanical seal blockage and mechanical seal damage caused by collision between solid particles and the mechanical seal are solved.

Description

Technical Field

[0001] The present application belongs to the technical field of workpiece processing, and specifically relates to an anti-blocking and anti-collision forced circulation pump. Background Art

[0002] In the use of forced circulation pumps, salt crystallization or particles in the medium often cause the mechanical seal of the forced circulation pump to become blocked, or the mechanical seal to be damaged due to the collision of solid particles with the mechanical seal. This problem has not been solved. Summary of the invention

[0003] The purpose of this application is to address the shortcomings of the prior art. By arranging an impeller on the rotating shaft of the impeller of the pump body and positioning the impeller inside the pump body, a blockage- and collision-resistant forced circulation pump is designed, which can prevent particles from running to the periphery of the seal and hitting the seal, and prevent crystals or other solid particles from being deposited around the seal and causing blockage of the seal, thereby solving the problem of how to prevent blockage of the mechanical seal and damage to the mechanical seal due to collision of solid particles with the mechanical seal.

[0004] To achieve the above objectives, this application provides the following technical solutions:

[0005] A blockage-proof and collision-proof forced circulation pump comprises a pump body, wherein an extension cavity is provided on the pump body, the cross-section of the extension cavity is circular, one end of the extension cavity is connected to the interior of the pump body, and the end of the rotating shaft of the impeller of the pump body away from the impeller coaxially passes through the extension cavity and extends out of the pump body, the end of the extension cavity away from the impeller is provided with a sealing member cooperating with the rotating shaft, a blade is radially fixed on the rotating shaft in the extension cavity, and a liquid inlet switch is provided on the sealing member.

[0006] Preferably, the extension cavity protrudes outward from the pump body.

[0007] Preferably, it further comprises a mounting ring, the blades are radially arranged on the outer circumferential surface of the mounting ring, and the mounting ring is fixedly sleeved on the rotating shaft.

[0008] Preferably, the mounting ring is provided with a plurality of blades.

[0009] Preferably, the liquid inlet switch comprises a flushing hole and a plug body, the flushing hole penetrates from one end of the seal toward the outside of the extension cavity into the extension cavity, a gap is preset between the flushing hole and the rotating shaft, and the plug body cooperates with the flushing hole.

[0010] Preferably, a support portion is fixedly provided outside the pump body, and the rotating shaft is rotatably connected to the support portion on a side of the sealing member away from the blades.

[0011] Preferably, the side of the seal facing away from the blade extends outside the extension cavity, the end of the flushing hole located outside the extension cavity is on the side wall of the seal away from the outer wall of the extension cavity and the axis is perpendicular to the rotating shaft, the end of the flushing hole located in the extension cavity is on the end face of the seal, and the plug body cooperates with the end of the flushing hole located outside the extension cavity.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The present application installs blades in front of the seal (mechanical seal) that allow the medium to rotate along the shaft, which can prevent particles from running to the periphery of the seal and hitting the seal, and can also prevent crystals or other solid particles from depositing around the seal.

[0014] 2. A flushing hole is opened on the mechanical seal of this application for cleaning blockages. Since the blades do not rotate when the forced circulation pump is stopped, crystals or solid particles will inevitably settle around the seal. In view of this special situation, water can be cleaned through this special flushing hole before the forced circulation pump is started. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of this application;

[0016] Figure 2 for Figure 1 sectional view of

[0017] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0018] In the figure: 1. Pump body; 2. Extension chamber; 3. Impeller; 4. Blades; 5. Mounting ring; 6. Flushing hole; 7. Plug body; 8. Support part. DETAILED DESCRIPTION

[0019] like Figure 1-3 As shown, a blockage-proof and collision-proof forced circulation pump includes a pump body 1, an extension chamber 2 is provided on the pump body 1, the cross-section of the extension chamber 2 is circular, one end of the extension chamber 2 is connected to the interior of the pump body 1, and the end of the rotating shaft 9 of the impeller 3 of the pump body 1 away from the impeller 3 coaxially passes through the extension chamber 2 and extends out of the pump body 1, and the end of the extension chamber 2 away from the impeller 3 is provided with a sealing member 10 cooperating with the rotating shaft 9, and a blade 4 is radially fixed on the rotating shaft 9 in the extension chamber 2, and a liquid inlet switch is provided on the sealing member 10.

[0020] In this embodiment, when the pump body 1 is working, the rotating shaft 9 rotates to drive the impeller 3 to rotate, thereby performing the pump function of the pump body 1; at the same time, the blades 4 also rotate under the action of the rotating shaft 9, thereby preventing the particles or crystals in the pump body 1 from moving to the seal 10 and hitting the seal 10 or settling on the seal 10. After the pump body 1 has been working for a long time, some particles or crystals will remain on the blades 4, or a very small amount of foreign particles will settle on the seal 10, and then the inside of the pump body 1 is cleaned by opening the liquid inlet switch and injecting water from the outside of the seal 10 into the extension cavity 2.

[0021] As a preferred embodiment, the extension chamber 2 protrudes outward from the pump body 1. This arrangement is to prevent the extension chamber 2 from occupying the space inside the pump body 1, thereby preventing the capacity inside the pump body 1 from being changed due to the provision of the extension chamber 2.

[0022] As a preferred embodiment, it further comprises a mounting ring 5, the blades 4 are radially arranged on the outer circumferential surface of the mounting ring 5, and the mounting ring 5 is fixedly sleeved on the rotating shaft 9. After such arrangement, compared with connecting the blades 4 one by one to the rotating shaft 9, it is convenient to install the blades 4 on the rotating shaft 9, and it is also convenient to replace and repair the blades 4 when they are damaged.

[0023] As a preferred embodiment, a plurality of blades 4 are provided on the mounting ring 5 .

[0024] As a preferred mode, the liquid inlet switch comprises a flushing hole 6 and a plug 7. The flushing hole 6 penetrates into the extension cavity 2 from one end of the seal 10 toward the outside of the extension cavity 2. A gap is preset between the flushing hole 6 and the rotating shaft 9, and the plug 7 cooperates with the flushing hole 6. After such arrangement, after the pump body 1 stops working, water can be poured into the pump body 1 from the flushing hole 6 to clean the blades 4 and the seal 10, so as to remove solid particles, precipitated impurities, scale, etc. on the blades 4 and the seal 10. When the pump body 1 is working, the plug 7 is used to plug the end of the flushing hole 6 located outside the extension cavity 2.

[0025] As a preferred embodiment, a support portion 8 is fixedly provided outside the pump body 1, and the rotating shaft 9 is rotatably connected to the support portion 8 on the side of the seal 10 away from the blade 4. In this way, by providing the support portion 8, the workload of the seal 10 is reduced, that is, the seal 10 does not need to play the role of supporting the rotating shaft 9, preventing the rotating shaft 9 from shaking radially.

[0026] As a preferred mode, the side of the sealing member 10 facing away from the blade 4 extends outside the extension chamber 2, the end of the flushing hole 6 outside the extension chamber 2 is on the side wall of the sealing member 10 away from the outer side wall of the extension chamber 2 and the axis is perpendicular to the rotating shaft 9, the end of the flushing hole 6 inside the extension chamber 2 is on the end surface of the sealing member 10, and the plug body 7 cooperates with the end of the flushing hole 6 outside the extension chamber 2. This arrangement facilitates connecting the external water pipe to the flushing hole 6 when cleaning the blades 4 inside the pump body 1.

Claims

1. A blockage and collision-proof forced circulation pump, comprising a pump body (1), characterized in that: The pump body (1) is provided with an extension chamber (2), the cross section of which is circular, one end of which is in communication with the interior of the pump body (1), and the end of the rotating shaft (9) of the impeller (3) of the pump body (1) which is away from the impeller (3) coaxially passes through the extension chamber (2) and extends out of the pump body (1), the end of the extending chamber (2) which is away from the impeller (3) is provided with a sealing member (10) which cooperates with the rotating shaft (9), the rotating shaft (9) is provided with a blade (4) which is radially fixed in the extending chamber (2), and the sealing member (10) is provided with a liquid inlet switch.

2. The anti-blocking and anti-collision forced circulation pump according to claim 1, characterized in that: The extension cavity (2) protrudes outwardly toward the pump body (1).

3. The anti-blocking and anti-collision forced circulation pump according to claim 1, characterized in that: It also comprises a mounting ring (5), the blades (4) are radially arranged on the outer circumferential surface of the mounting ring (5), and the mounting ring (5) is fixedly sleeved on the rotating shaft (9).

4. The anti-blocking and anti-collision forced circulation pump according to claim 3, characterized in that: A plurality of blades (4) are arranged on the mounting ring (5).

5. The anti-blocking and anti-collision forced circulation pump according to claim 1, characterized in that: The liquid inlet switch comprises a flushing hole (6) and a plug body (7); the flushing hole (6) penetrates into the extension cavity (2) from one end of the sealing member (10) toward the outside of the extension cavity (2); a gap is preset between the flushing hole (6) and the rotating shaft (9); and the plug body (7) cooperates with the flushing hole (6).

6. The anti-blocking and anti-collision forced circulation pump according to claim 5, characterized in that: A support portion (8) is fixedly provided outside the pump body (1), and the rotating shaft (9) is rotatably connected to the support portion (8) on a side of the sealing member (10) away from the blades (4).

7. The anti-blocking and anti-collision forced circulation pump according to claim 5, characterized in that: The side of the sealing member (10) facing away from the blade (4) extends outside the extension cavity (2); the end of the flushing hole (6) located outside the extension cavity (2) is on the side wall of the sealing member (10) away from the outer wall of the extension cavity (2) and the axis is perpendicular to the rotating shaft (9); the end of the flushing hole (6) located inside the extension cavity (2) is on the end surface of the sealing member (10); and the plug body (7) cooperates with the end of the flushing hole (6) located outside the extension cavity (2).

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