Spiral self-priming pulp pump impeller with self-priming capacity

Abstract

The utility model discloses a spiral self-suction paper pulp pump impeller with self-suction capacity, and relates to the technical field of paper pulp pump equipment. The utility model discloses a base body, the one end fixed with paper pulp pump main body of base body, the utility model when paper pulp pump starts, the high -speed rotation of impeller main body, the central region forms the negative pressure because of centrifugal force, at this time, the pressure difference of the sealing block in self -suction hole is received external atmospheric pressure and internal negative pressure, overcomes the spring rod's elasticity and moves to self -suction hole inside, and the sealing groove of sealing block and baffle block is separated and engages, and self -suction hole is led through, and the outside air is sucked into the impeller center through self -suction hole, and the air in pump cavity is discharged with acceleration, and the self -suction time is shortened, when paper pulp fills up pump cavity, the pressure in impeller main body rises, and the thrust of paper pulp to sealing block increases, and sealing block is compressed spring rod, and is re -engaged into sealing groove, and self -suction hole is closed, at this time, baffle block and sealing block closely fit, and prevent paper pulp from seeping through self -suction hole.

Description

Technical Field

[0001] This utility model relates to the technical field of pulp pump equipment, specifically to a spiral self-priming pulp pump impeller with self-priming capability. Background Technology

[0002] In the pulp conveying and related industrial fields, pulp pumps are indispensable key equipment, and their performance directly affects the efficiency and stability of the entire production process. With the continuous development of industries such as papermaking and pulping, the performance requirements for pulp pumps are also increasing. They not only need to have the ability to efficiently convey pulp, but also need to maintain stable operation under complex working conditions, reducing maintenance costs and downtime.

[0003] Existing pulp pumps often suffer from self-priming performance issues. Common impeller structures cannot quickly establish effective negative pressure, resulting in long self-priming times. Ordinary self-priming pump impellers rely solely on the conventional centrifugal force generated by impeller rotation during startup, lacking additional efficient exhaust channels. This makes it difficult to quickly expel air from the pump chamber, leading to long self-priming times. Furthermore, during the pulp conveying stage, these pulp pumps cannot effectively prevent pulp backflow. When the pump stops or pressure fluctuations occur, pulp easily flows back through the exhaust channels, causing efficiency losses. After prolonged operation, pulp residue easily adheres to the inner wall of the pump casing, forming stubborn scale over time, severely affecting the pump's self-priming sealing and conveying efficiency. Therefore, this invention provides a spiral self-priming pulp pump impeller with self-priming capability. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a spiral self-priming pulp pump impeller with self-priming capability. This solves the problems of common impeller structures in existing pulp pumps, which cannot quickly establish effective negative pressure, resulting in long self-priming times. Ordinary self-priming pump impellers rely solely on the conventional centrifugal force generated by impeller rotation during startup, lacking an additional efficient exhaust channel. This makes it difficult to quickly expel air from the pump chamber, leading to long self-priming times. Furthermore, during the pulp conveying stage, these pulp pumps cannot effectively prevent pulp backflow. When the pump stops or pressure fluctuations occur, pulp easily flows back through the exhaust channel, causing efficiency loss. After prolonged operation, pulp residue easily adheres to the inner wall of the pump casing, forming stubborn scale over time, severely affecting the pump's self-priming sealing and conveying efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a spiral self-priming pulp pump impeller with self-priming capability, comprising a base body, a pulp pump body fixed to one end of the base body, and an installation mechanism for the spiral self-priming pulp pump equipment provided on the pulp pump body, the installation mechanism comprising:

[0006] The self-priming assembly includes an impeller body installed inside the pulp pump body. The impeller body has a self-priming hole inside. A sealing block connected by an elastic component is installed inside the self-priming hole. A stop block is fixed to the inner wall of the self-priming hole. A sealing groove is installed inside the stop block.

[0007] The cleaning assembly includes a fixed outer shell uniformly fixed to the outer wall of the impeller body, a scraper body connected by a buffer assembly inside the fixed outer shell, a reinforcing block fixed to the surface of the impeller body, and a blade body fixed to the surface of the reinforcing block.

[0008] Preferably, the elastic component includes a fixing block fixed to the inner wall of the self-priming hole, a spring rod fixed to the inner wall of the fixing block, a sealing block fixedly connected to one end of the spring rod, and the sealing block and the sealing groove being engaged.

[0009] Preferably, the upper and lower ends of the sealing block are fixed with guide rods, and the inner wall of the self-priming hole is provided with a guide groove, and the guide rod and the guide groove are slidably connected.

[0010] Preferably, the impeller body is an integral design, and the impeller is located inside, and the impeller has a wave-like structure.

[0011] Preferably, the reinforcing blocks are evenly distributed on both sides of the impeller body, and the reinforcing blocks are evenly distributed along the surface of the impeller body. The blade bodies provided on the reinforcing blocks are configured as two sets.

[0012] Preferably, the buffer assembly includes a movable groove inside the fixed outer shell, and shock-absorbing springs are uniformly fixed on the inner wall of the movable groove. The scraper body is fixedly connected to one end of the shock-absorbing spring, and the scraper body is slidably connected to the movable groove. The inner ring of the shock-absorbing spring is provided with a damping support rod, and the damping support rod is fixedly connected to the fixed outer shell. One end of the scraper body is in contact with the inner wall of the pulp pump body.

[0013] Beneficial effects

[0014] This invention provides a spiral self-priming pulp pump impeller with self-priming capability. Compared with the prior art, it has the following advantages:

[0015] Firstly, when the pulp pump starts, the impeller body rotates at high speed, and a negative pressure is formed in its central area due to centrifugal force. At this time, the sealing block in the self-priming hole is subjected to the pressure difference between the external atmospheric pressure and the internal negative pressure, which overcomes the elastic force of the spring rod and moves towards the inside of the self-priming hole. The sealing block and the sealing groove of the stop block disengage, and the self-priming hole is opened. External air is drawn into the center of the impeller through the self-priming hole, accelerating the discharge of air in the pump chamber and shortening the self-priming time. When the pulp fills the pump chamber, the pressure in the impeller body increases, and the thrust of the pulp on the sealing block increases, pushing the sealing block to compress the spring rod and re-engage in the sealing groove, closing the self-priming hole. At this time, the stop block and the sealing block fit tightly together, preventing pulp from seeping in through the self-priming hole. The engagement of the elastic sealing block and the sealing groove effectively prevents pulp backflow. The self-priming hole automatically opens during self-priming to ensure efficient exhaust and automatically closes during pulp conveying to prevent efficiency loss. The specially designed self-priming hole channel provides an additional exhaust path besides the main impeller channel, which significantly accelerates the exhaust speed, shortens the self-priming time, and improves working efficiency.

[0016] Secondly, when the impeller body of this utility model rotates, the fixed outer shell rotates synchronously with the impeller. Under the elastic force of the damping spring, the scraper body always adheres to the inner wall of the pulp pump body. During rotation, the scraper body scrapes away the pulp residue attached to the inner wall of the pump casing, preventing scaling. If there are protrusions or hard impurities on the inner wall of the pump casing, the scraper body compresses the damping spring and moves backward along the movable groove. The damping support rod slows down the spring rebound speed, preventing the scraper from being damaged by violent collisions. The elastic fitting design of the scraper body can adapt to the slight deformation of the inner wall of the pump casing. The dynamic cleaning of the scraper body reduces the deposition of pulp in the pump body, reducing the maintenance frequency. Moreover, the evenly distributed reinforcing blocks and the blades on them rotate at high speed with the impeller, cutting and breaking up long fiber clumps and entanglements in the pulp medium passing through the pump cavity, fundamentally reducing the risk of blockage. Attached Figure Description

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

[0018] Figure 2 This is a schematic diagram of the internal structure of the pulp pump body of this utility model;

[0019] Figure 3 This is a schematic diagram of the impeller main structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the self-priming hole structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the main structure of the scraper of this utility model.

[0022] In the diagram: 1. Base body; 2. Pulp pump body; 3. Impeller body; 4. Self-priming hole; 401. Fixing block; 402. Spring rod; 403. Sealing block; 404. Stop block; 405. Sealing groove; 406. Guide rod; 407. Guide groove; 5. Fixed outer shell; 501. Movable groove; 502. Shock-absorbing spring; 503. Damping support rod; 504. Scraper body; 6. Reinforcing block; 601. Blade body. Detailed Implementation

[0023] 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.

[0024] Please see Figures 1-5 This utility model provides a technical solution: a spiral self-priming pulp pump impeller with self-priming capability, including a base body 1, a pulp pump body 2 fixed to one end of the base body 1, and an installation mechanism for the spiral self-priming pulp pump equipment provided on the pulp pump body 2, the installation mechanism including:

[0025] The self-priming assembly includes an impeller body 3 disposed inside the pulp pump body 2, a self-priming hole 4 opened inside the impeller body 3, a sealing block 403 connected by an elastic component inside the self-priming hole 4, a stop block 404 fixed to the inner wall of the self-priming hole 4, and a sealing groove 405 opened inside the stop block 404.

[0026] The cleaning assembly includes a fixed housing 5 uniformly fixed to the outer wall of the impeller body 3, a scraper body 504 connected by a buffer assembly inside the fixed housing 5, a reinforcing block 6 fixed to the surface of the impeller body 3, and a blade body 601 fixed to the surface of the reinforcing block 6.

[0027] In a preferred embodiment, the elastic component includes a fixing block 401 fixed to the inner wall of the self-priming hole 4, a spring rod 402 fixed to the inner wall of the fixing block 401, a sealing block 403 fixedly connected to one end of the spring rod 402, the sealing block 403 engaging with the sealing groove 405, guide rods 406 fixed to the upper and lower ends of the sealing block 403, a guide groove 407 formed on the inner wall of the self-priming hole 4, and the guide rod 406 slidingly connected to the guide groove 407. When the pulp pump starts, the impeller body 3 rotates at high speed, and a negative pressure is formed in its central area due to centrifugal force. At this time, the sealing block 403 in the self-priming hole 4 is subjected to external atmospheric pressure. The pressure difference between the pressure and the internal negative pressure overcomes the elastic force of the spring rod 402 and moves to the inside of the self-priming hole 4. The sealing block 403 and the sealing groove 405 of the stop block 404 disengage, and the self-priming hole 4 becomes open. Outside air is drawn into the center of the impeller through the self-priming hole 4, accelerating the discharge of air from the pump chamber and shortening the self-priming time. When the pulp fills the pump chamber, the pressure inside the impeller body 3 increases, and the thrust of the pulp on the sealing block 403 increases, pushing the sealing block 403 to compress the spring rod 402 and re-engage in the sealing groove 405. The self-priming hole 4 closes. At this time, the stop block 404 and the sealing block 403 fit tightly together to prevent pulp from seeping in through the self-priming hole 4.

[0028] The guide rod 406 slides along the guide groove 407 to ensure that the sealing block 403 moves smoothly.

[0029] In a preferred embodiment, the impeller body 3 is an integral design, with the impeller located inside. The impeller has a wave-like structure, and the reinforcing blocks 6 are evenly distributed on both sides of the impeller body 3. The reinforcing blocks 6 are evenly distributed along the surface of the impeller body 3. The blade bodies 601 on the reinforcing blocks 6 are set in two groups. The reinforcing blocks 6 rotate with the impeller body 3, and the two groups of blade bodies 601 on their surfaces cut the pulp fibers entering the impeller flow channel. The wave-like impeller structure, combined with the rotational shearing force of the blades, breaks long fibers into short fibers, preventing them from entangled in the impeller. The integrated design of the impeller body 3 and the wave-like impeller enhance the centrifugal force field during self-priming.

[0030] Among them, the reinforcing blocks 6 are evenly distributed along the surface of the impeller body 3, which enhances the overall strength of the impeller and prevents deformation caused by high-speed rotation or pulp impact.

[0031] In a preferred embodiment, the buffer assembly includes a movable groove 501 inside the fixed housing 5. Shock-absorbing springs 502 are uniformly fixed to the inner wall of the movable groove 501. A scraper body 504 is fixedly connected to one end of the shock-absorbing springs 502, and the scraper body 504 is slidably connected to the movable groove 501. A damping support rod 503 is provided on the inner ring of the shock-absorbing springs 502, and the damping support rod 503 is fixedly connected to the fixed housing 5. One end of the scraper body 504 is in contact with the inner wall of the pulp pump body 2. When the impeller body 3 rotates, the fixed housing 5 rotates synchronously with the impeller. 4. Under the elastic force of the damping spring 502, the scraper body 504 always adheres to the inner wall of the pulp pump body 2. During rotation, the scraper body 504 scrapes off the pulp residue attached to the inner wall of the pump casing to prevent scaling. If there are protrusions or hard impurities on the inner wall of the pump casing, the scraper body 504 compresses the damping spring 502 and moves backward along the movable groove 501. The damping support rod 503 slows down the spring rebound speed to prevent the scraper from being damaged by violent collision. The elastic fitting design of the scraper body 504 can adapt to the slight deformation of the inner wall of the pump casing. The dynamic cleaning of the scraper body 504 reduces the deposition of pulp in the pump body and reduces the maintenance frequency.

[0032] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0033] During operation, the impeller body 3 rotates at high speed, and a negative pressure is formed in its central area due to centrifugal force. At this time, under the pressure difference between the external atmospheric pressure and the internal negative pressure, the sealing block 403 in the self-priming hole 4 overcomes the elastic force of the spring rod 402 fixed to the inner wall of the fixed block 401 in the elastic component and moves towards the inner side of the self-priming hole 4. The sealing block 403 disengages from the sealing groove 405 inside the stop block 404 fixed to the inner wall of the self-priming hole 4, and the self-priming hole 4 is opened. External air is drawn into the center of the impeller through the self-priming hole 4, accelerating the pump chamber. Air is discharged to shorten the self-priming time, and the guide rod 406 fixed at the upper and lower ends of the sealing block 403 slides along the guide groove 407 opened on the inner wall of the self-priming hole 4 to ensure that the sealing block 403 moves smoothly; when the pulp fills the pump cavity, the pressure inside the impeller body 3 increases, the thrust of the pulp on the sealing block 403 increases, pushing the sealing block 403 to compress the spring rod 402 and re-engage into the sealing groove 405, the self-priming hole 4 closes, and the stop block 404 fits tightly with the sealing block 403 to prevent the pulp from seeping in through the self-priming hole 4;

[0034] At the same time, when the impeller body 3, which is designed as a whole and has a wave-shaped impeller inside, rotates, the fixed outer shell 5, whose outer wall is uniformly fixed, rotates synchronously. The damping spring 502, whose inner wall is uniformly fixed in the movable groove 501 inside the fixed outer shell 5, drives the scraper body 504 to always be in contact with the inner wall of the pulp pump body 2. During rotation, the scraper body 504 scrapes off the pulp residue attached to the inner wall of the pump casing to avoid scaling. If there are protrusions or hard impurities on the inner wall of the pump casing, the scraper body 504 compresses the damping spring 502 and moves backward along the movable groove 501. The damping support rod 503 slows down the spring rebound speed to avoid damage to the scraper due to violent collision.

[0035] Meanwhile, the reinforcing blocks 6, which are evenly distributed on the surface of the impeller body 3 and located on both side walls, rotate synchronously with the impeller. The two sets of blade bodies 601 on their surfaces cut the pulp fibers entering the impeller flow channel. The wave-shaped impeller structure, together with the rotational shearing force of the blades, breaks long fibers into short fibers to prevent them from entangled in the impeller. The evenly distributed reinforcing blocks 6 also enhance the overall strength of the impeller, preventing impeller deformation caused by high-speed rotation or pulp impact. The wave-shaped impeller can also enhance the centrifugal force field during self-priming. The elastic fitting design of the scraper body 504 can adapt to the slight deformation of the pump casing inner wall, reducing pulp deposition in the pump body through dynamic cleaning and reducing maintenance frequency.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-priming spiral pulp pump impeller, comprising a base body (1), wherein a pulp pump body (2) is fixed to one end of the base body (1), characterized in that: The pulp pump body (2) is provided with an installation mechanism for the spiral self-priming pulp pump equipment, the installation mechanism including: The self-priming assembly includes an impeller body (3) disposed inside the pulp pump body (2), a self-priming hole (4) is provided inside the impeller body (3), a sealing block (403) connected by an elastic component is disposed inside the self-priming hole (4), a stop block (404) is fixed on the inner wall of the self-priming hole (4), and a sealing groove (405) is provided inside the stop block (404). The cleaning assembly includes a fixed housing (5) uniformly fixed to the outer wall of the impeller body (3), and a scraper body (504) connected by a buffer assembly is provided inside the fixed housing (5). A reinforcing block (6) is fixed to the surface of the impeller body (3), and a blade body (601) is fixed to the surface of the reinforcing block (6).

2. The self-priming spiral pulp pump impeller according to claim 1, characterized in that: The elastic component includes a fixing block (401) fixed to the inner wall of the self-suction hole (4), a spring rod (402) fixed to the inner wall of the fixing block (401), a sealing block (403) fixedly connected to one end of the spring rod (402), and the sealing block (403) and the sealing groove (405) being engaged.

3. The self-priming spiral pulp pump impeller according to claim 1, characterized in that: The sealing block (403) is fixed with guide rods (406) at its upper and lower ends, and the self-suction hole (4) has a guide groove (407) on its inner wall. The guide rod (406) and the guide groove (407) are slidably connected.

4. The self-priming spiral pulp pump impeller according to claim 1, characterized in that: The impeller body (3) is an integral design, and the impeller is located inside, and the impeller has a wave-like structure.

5. The self-priming spiral pulp pump impeller according to claim 1, characterized in that: The reinforcing blocks (6) are evenly distributed on both sides of the impeller body (3). The reinforcing blocks (6) are evenly distributed along the surface of the impeller body (3). The blade bodies (601) on the reinforcing blocks (6) are arranged in two groups.

6. The self-priming spiral pulp pump impeller according to claim 1, characterized in that: The buffer assembly includes a movable groove (501) inside the fixed outer shell (5). The inner wall of the movable groove (501) is uniformly fixed with shock-absorbing springs (502). The scraper body (504) is fixedly connected to one end of the shock-absorbing spring (502). The scraper body (504) is slidably connected to the movable groove (501). The inner ring of the shock-absorbing spring (502) is provided with a damping support rod (503), and the damping support rod (503) is fixedly connected to the fixed outer shell (5). One end of the scraper body (504) is in contact with the inner wall of the pulp pump body (2).

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