Anti-blocking and anti-collision forced circulation pump

Abstract

The utility model 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 application belongs to the technical field of workpiece processing, in particular to a kind of anti-blocking anti-collision forced circulation pump. BACKGROUND

[0002] In the use of forced circulation pump, due to salt crystallization or medium itself with particles, often lead to the mechanical seal of forced circulation pump is blocked, or due to solid particles and mechanical seal collision lead to mechanical seal damage. And this problem has not been solved. CONTENT OF THE UTILITY MODEL

[0003] The application aims at the shortcomings of prior art, adopts the mode that impeller is arranged on the rotating shaft of impeller of pump body and impeller is located in pump body, designs a kind of anti-blocking anti-collision forced circulation pump, can prevent particle from running to the periphery of seal and impacting seal, and prevent crystalline or other solid particles from depositing around seal to cause seal to be blocked, solve how to prevent mechanical seal from being blocked and due to solid particles and mechanical seal collision lead to mechanical seal damage.

[0004] To achieve the above object, the application provides the following technical scheme:

[0005] A kind of anti-blocking anti-collision forced circulation pump, including pump body, the pump body is equipped with extension cavity, the cross section of the extension cavity is circular, one end of the extension cavity is communicated with the inside of the pump body, the rotating shaft of the impeller of the pump body is coaxially penetrated through the extension cavity and extends to the outside of the pump body away from one end of the impeller, the extension cavity is equipped with sealing element matched with the rotating shaft away from one end of the impeller, the rotating shaft is fixed with blade radially in the extension cavity, and the sealing element is equipped with liquid inlet switch.

[0006] Preferably, the extension cavity protrudes towards the outside of the pump body.

[0007] Preferably, it further includes mounting ring, the blade is 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 equipped with a plurality of blades.

[0009] Preferably, the liquid inlet switch includes flushing hole, plug body, the flushing hole is penetrated into the extension cavity from one end of the sealing element towards the outside of the extension cavity, and the flushing hole is provided with a gap between the rotating shaft, and the plug body is matched with the flushing hole.

[0010] Preferably, the pump body is fixedly provided with support portion, and the rotating shaft is rotatably connected with the support portion on the side of the sealing element away from the blade.

[0011] Preferably, the side of the sealing member away from the vane extends outside the extension cavity, the end of the flushing hole outside the extension cavity is on the side wall of the sealing member away from the outer side wall of the extension cavity and the axis is perpendicular to the rotating shaft, the end of the flushing hole inside the extension cavity is on the end surface of the sealing member, and the plug body is matched with the end of the flushing hole outside the extension cavity.

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

[0013] 1. The application adds a vane in front of the sealing member (mechanical seal) which can rotate along the rotating shaft, so that particles cannot run to the periphery of the sealing member to hit the sealing member, and crystalline bodies or other solid particles cannot deposit around the sealing member.

[0014] 2. The mechanical seal of the application is provided with a flushing hole specially used for cleaning blockage. Since the vane does not rotate when the forced circulation pump is stopped, crystalline bodies or solid particles will inevitably deposit around the sealing member. In this special case, water can be introduced through the special flushing hole to clean before the forced circulation pump is started. BRIEF DESCRIPTION OF DRAWINGS

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

[0016] Figure 2 It is a sectional view of Figure 1 ;

[0017] Figure 3 It is an enlarged view of A in Figure 2 ;

[0018] In the figure: 1, pump body; 2, extension cavity; 3, impeller; 4, vane; 5, mounting ring; 6, flushing hole; 7, plug body; 8, support part. DETAILED DESCRIPTION

[0019] As shown in Figures 1-3 , a forced circulation pump capable of preventing blockage and collision comprises a pump body 1, the pump body 1 is provided with an extension cavity 2, the cross section of the extension cavity 2 is circular, one end of the extension cavity 2 is in communication with the inside of the pump body 1, the rotating shaft 9 of the impeller 3 of the pump body 1 coaxially penetrates the extension cavity 2 and extends out of the pump body 1 away from the impeller 3, the extension cavity 2 away from the impeller 3 is provided with a sealing member 10 matched with the rotating shaft 9, the rotating shaft 9 is radially fixedly provided with a vane 4 inside the extension cavity 2, and the sealing member 10 is provided with a liquid inlet switch.

[0020] In the embodiment, when the pump body 1 is working, the rotating shaft 9 rotates to drive the impeller 3 to rotate, thereby performing the function of the pump of the pump body 1; at the same time, the vane 4 also rotates under the action of the rotating shaft 9, thereby preventing the particles or crystals in the pump body 1 from moving to the sealing element 10 to impact the sealing element 10 or deposit at the sealing element 10. After the pump body 1 works for a long time, some particles or crystals are left on the vane 4, or a very small amount of impurity particles are deposited at the sealing element 10, and then water is injected from outside the sealing element 10 into the extension cavity 2 to clean the inside of the pump body 1 by opening the liquid inlet switch.

[0021] As a preferred mode, the extension cavity 2 protrudes outward from the pump body 1. Such a mode is to make the extension cavity 2 not occupy the space inside the pump body 1, so as not to change the capacity of the inside of the pump body 1 because of the extension cavity 2.

[0022] As a preferred mode, the mounting ring 5 is further provided, the vane 4 is 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 a mode is provided, compared with the mode that one vane 4 is connected with the rotating shaft 9, it is convenient to install the vane 4 on the rotating shaft 9, and it is also convenient to repair and replace the vane 4 in the case of damage.

[0023] As a preferred mode, a plurality of vanes 4 are arranged on the mounting ring 5.

[0024] As a preferred mode, the liquid inlet switch comprises a flushing hole 6 and a plug body 7. The flushing hole 6 penetrates from one end of the sealing element 10 outward to the extension cavity 2, and a gap is provided between the flushing hole 6 and the rotating shaft 9. The plug body 7 is matched with the flushing hole 6. After the pump body 1 stops working, water can be poured into the pump body 1 through the flushing hole 6 to clean the vane 4 and the sealing element 10, so as to remove the solid particles, deposited impurities, scale and the like on the vane 4 and the sealing element 10. When the pump body 1 works, the plug body 7 is used to plug the end of the flushing hole 6 outside the extension cavity 2.

[0025] As a preferred mode, the support part 8 is fixedly arranged outside the pump body 1, and the rotating shaft 9 is rotationally connected with the support part 8 on the side of the sealing element 10 away from the vane 4. By arranging the support part 8, the working load of the sealing element 10 is reduced, that is, the sealing element 10 does not need to support the rotating shaft 9, so as to prevent the rotating shaft 9 from shaking in the radial direction.

[0026] As a preferred mode, the seal 10 extends beyond the extension cavity 2 on the side opposite the vane 4, the end of the flushing hole 6 located outside the extension cavity 2 is on the side wall of the seal 10 away from the outer side wall of the extension cavity 2 and the axis is perpendicular to the rotation shaft 9, the end of the flushing hole 6 located inside the extension cavity 2 is on the end face of the seal 10, and the plug 7 cooperates with the end of the flushing hole 6 located outside the extension cavity 2. In this way, the external water pipe can be connected with the flushing hole 6 when the vane 4 inside the pump body 1 is cleaned.

Claims

1. A clogging and collision preventing forced circulation pump comprising a pump body (1), characterized in that, The pump body (1) is provided with an extension cavity (2), the cross section of the extension cavity (2) is circular, one end of the extension cavity (2) is communicated with the inside of the pump body (1), the rotation shaft (9) of the impeller (3) of the pump body (1) penetrates the extension cavity (2) coaxially and extends out of the pump body (1) from the end away from the impeller (3), the end of the extension cavity (2) away from the impeller (3) is provided with a sealing element (10) matched with the rotation shaft (9), the rotation shaft (9) is radially fixedly provided with a blade (4) in the extension cavity (2), and the sealing element (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 outwards of the pump body (1).

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

4. The anti-blocking and anti-collision forced circulation pump according to claim 3, characterized in that: The mounting ring (5) is provided with a plurality of blades (4).

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 the end of the sealing element (10) away from the extension cavity (2), a gap is preset between the flushing hole (6) and the rotation shaft (9), and the plug body (7) is matched with the flushing hole (6).

6. The anti-blocking and anti-collision forced circulation pump according to claim 5, characterized in that: The pump body (1) is fixedly provided with a support portion (8), and the rotation shaft (9) is rotationally connected with the support portion (8) on the side of the sealing element (10) away from the blade (4).

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

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