Scraper device for bag-pulling scraper centrifugal machine

Abstract

The scraper device comprises a lifting air cylinder and an air cylinder plunger arranged in the lifting air cylinder, an air cylinder shaft is arranged at the bottom end of the air cylinder plunger, the bottom end of the air cylinder shaft is exposed out of the lower side of the bottom end of the lifting air cylinder, a metal fixing sleeve is fixed to the outer portion of the bottom end of the air cylinder shaft, and the metal fixing sleeve is connected with the lifting air cylinder. A novel auxiliary scraping device is additionally arranged on a scraper horizontal support, when a strip-shaped metal scraper can scrape a filter cake on a filter bag in the rotating process of a rotary drum, an auxiliary scraping batten of the auxiliary scraping device makes full contact with the inner wall of the filter bag through auxiliary scraping bristles, and after the strip-shaped metal scraper scrapes the filter cake on the inner wall of the filter bag, the auxiliary scraping batten of the auxiliary scraping device makes full contact with the inner wall of the filter bag through the auxiliary scraping bristles. The auxiliary scraping batten located on the rear side can further clean fine particles possibly left after the filter cake is scraped by the strip-shaped metal scraper through the auxiliary scraping brush bristles, it is ensured that the cleanliness of the inner wall of the filter bag is higher, the filter bag can be prevented from being excessively scraped and damaged due to the soft characteristic of the auxiliary scraping brush bristles, and the service life of the filter bag is prolonged.

Description

Technical Field

[0001] This utility model belongs to the technical field of separation equipment, specifically relating to a scraper device for a bag-scraper centrifuge. Background Technology

[0002] With the continuous development of industrial production, scraper bag centrifuges have been widely used in many fields. Scraper bag centrifuges mainly achieve solid-liquid separation through centrifugal force generated by high-speed rotation, in which the filter bag plays a crucial role. However, in existing technologies, simply scraping the filter cake off the inner wall of the filter bag by contacting the scraper with the filter bag on the centrifuge drum can easily lead to problems such as insufficient contact, incomplete scraping, and a large amount of residue remaining in the filter bag pores.

[0003] On the one hand, because the contact method between the scraper and the filter bag is relatively simple, it is difficult to ensure that all parts of the scraper and the filter bag can make full contact in actual operation. This results in some filter cake not being effectively scraped off, affecting the separation effect and working efficiency of the centrifuge. On the other hand, relying solely on the scraper to scrape the material often fails to clean the residual filter cake in the filter bag pores. These residual filter cakes will gradually accumulate, not only affecting the separation effect of the next time, but also potentially clogging the filter pores, reducing the permeability of the filter bag, increasing the operating resistance of the centrifuge, and even potentially damaging the filter bag and centrifuge equipment.

[0004] To address these issues, this invention provides a scraper device for a bag-scraper centrifuge. This device adds an auxiliary scraping mechanism to the traditional scraper, which effectively improves the thoroughness of scraping, reduces filter bag residue, and enhances the centrifuge's performance and reliability. Utility Model Content

[0005] The purpose of this invention is to provide a scraper device for a bag-fed centrifuge, in order to solve the problem mentioned in the background art that, due to the relatively simple contact method between the scraper and the filter bag, it is difficult to ensure that all parts of the scraper and the filter bag can make full contact in actual operation, resulting in some filter cake not being effectively scraped off, which affects the separation effect and working efficiency of the centrifuge.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a scraper device for a bag scraper centrifuge, comprising a lifting cylinder and a cylinder plunger disposed inside the lifting cylinder. A cylinder shaft is disposed at the bottom end of the cylinder plunger, and the bottom end of the cylinder shaft is exposed below the bottom end of the lifting cylinder. A metal fixing sleeve is fixed to the outside of the bottom end of the cylinder shaft. A scraper horizontal bracket is welded to the outer wall of the left end of the metal fixing sleeve. A scraper fixing block is disposed at the left end of the scraper horizontal bracket. A strip-shaped metal scraper is disposed at the rear end of the scraper fixing block. An auxiliary scraping device is disposed outside the scraper horizontal bracket.

[0007] Preferably, the auxiliary scraping device includes a screw fixing sleeve, a horizontal tilting bracket, and a metal fixing plate. The screw fixing sleeve is sleeved on the outside of the horizontal scraper bracket. Both ends of the screw fixing sleeve are fixedly connected to the horizontal scraper bracket by screws. A horizontal tilting bracket is provided on the outer wall of the rear end of the horizontal scraper bracket. The rear end of the horizontal tilting bracket extends tilted to the left rear side. A metal fixing plate is provided at the rear end of the horizontal tilting bracket. The horizontal tilting bracket is fixedly connected to the screw fixing sleeve and the metal fixing plate by welding.

[0008] Preferably, the auxiliary scraping device further includes an auxiliary scraping strip and auxiliary scraping bristles. The auxiliary scraping strip is provided at the rear end of the metal fixing plate. The auxiliary scraping strip is fixedly connected to the metal fixing plate by multiple screws. The outer wall of the rear end of the auxiliary scraping strip is densely covered with auxiliary scraping bristles.

[0009] Preferably, the auxiliary scraping brush bristles are soft bristles, the outer wall of the rear end of the auxiliary scraping strip is on the same circular trajectory as the outer wall of the left end of the strip-shaped metal scraper, and the vertical height of the auxiliary scraping strip is equal to the vertical height of the strip-shaped metal scraper.

[0010] Preferably, the scraper fixing block and the strip-shaped metal scraper are fixedly connected by multiple screws, the left end of the strip-shaped metal scraper is blunted, and the left end of the strip-shaped metal scraper is exposed on the left side of the left end of the scraper fixing block.

[0011] Preferably, a sealing sleeve is fixed to the outside of the bottom end of the lifting cylinder, and a fixing flange is provided on the outside of the bottom end of the sealing sleeve. The fixing flange is fixed to the top of the end cover of the bag scraper centrifuge by multiple screws.

[0012] Preferably, the top of the lifting cylinder is provided with an external cylinder connector, and the inside of the lifting cylinder can be pressurized and depressurized through the external cylinder connector. Pressurization inside the lifting cylinder can push the cylinder plunger downward, and depressurization inside the lifting cylinder can pull the cylinder plunger upward.

[0013] Compared with the prior art, the present invention provides a scraper device for a bag-scraping centrifuge, which has the following advantages:

[0014] This invention adds a novel auxiliary scraping device to the horizontal support of the scraper. When the lifting cylinder lowers the strip-shaped metal scraper via the cylinder shaft, causing it to contact the filter bags inside the centrifuge, the rotating drum drives the filter bags on the inner wall to rotate synchronously. Therefore, the strip-shaped metal scraper scrapes off the filter cake on the filter bags during the drum's rotation. Simultaneously, the auxiliary scraping strips of the auxiliary scraping device, through their auxiliary scraping bristles, fully contact the inner wall of the filter bags. After the strip-shaped metal scraper removes the filter cake from the inner wall of the filter bags, the auxiliary scraping strips located at the rear, through their auxiliary scraping bristles, can further... The auxiliary scraping device removes any fine particles that may remain after the filter cake is scraped off by the strip metal scraper, ensuring a higher level of cleanliness on the inner wall of the filter bag. The soft texture of the auxiliary scraping brush bristles prevents excessive scratching damage to the filter bag, extending its service life. Furthermore, since the outer wall of the rear end of the auxiliary scraping strip is on the same circular trajectory as the outer wall of the left end of the strip metal scraper and has the same vertical height, it can work in tandem with the strip metal scraper, improving scraping efficiency and effect. This makes the entire scraper device play a more significant role in the bag-pulling scraper centrifuge, providing a strong guarantee for the efficient and stable operation of the centrifuge. Attached Figure Description

[0015] Figure 1 This is a front-view perspective three-dimensional structural diagram of a scraper device for a bag-scraping centrifuge according to the present invention.

[0016] Figure 2 This is a front view schematic diagram of the scraper device for a bag scraper centrifuge according to the present invention.

[0017] Figure 3 This is a front-view three-dimensional structural diagram of the auxiliary scraping device of this utility model.

[0018] Figure 4 This is a rear-view three-dimensional structural diagram of the auxiliary scraping device of this utility model.

[0019] In the diagram: 1. Cylinder shaft; 2. Metal fixing sleeve; 3. Scraper horizontal support; 4. Scraper fixing block; 5. Strip metal scraper; 6. Auxiliary scraping device; 7. Fixing flange; 8. Sealing fixing sleeve; 9. Lifting cylinder; 10. Cylinder external connector; 11. Screw fixing sleeve; 12. Horizontal tilting support; 13. Metal fixing plate; 14. Auxiliary scraping strip; 15. Auxiliary scraping brush. Detailed Implementation

[0020] 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.

[0021] This utility model provides, for example Figure 1-4 The scraper device shown is for a bag-scraping centrifuge, including a lifting cylinder 9 and a cylinder plunger disposed inside the lifting cylinder 9. A cylinder shaft 1 is located at the bottom end of the cylinder plunger, and the bottom end of the cylinder shaft 1 is exposed below the bottom end of the lifting cylinder 9. A metal fixing sleeve 2 is fixed to the outside of the bottom end of the cylinder shaft 1. A scraper horizontal support 3 is welded to the outer wall of the left end of the metal fixing sleeve 2. A scraper fixing block 4 is located at the left end of the scraper horizontal support 3. A strip-shaped metal scraper 5 is located at the rear end of the scraper fixing block 4. The scraper fixing block 4 and the strip-shaped metal scraper 5 are fixedly connected by multiple screws. The left end of the strip-shaped metal scraper 5 is blunted, and the left end of the strip-shaped metal scraper 5 is exposed on the left side of the left end of the scraper fixing block 4. When it is necessary to clean the filter bags inside the bag-scraping centrifuge, the cylinder external connector 10 at the top of the lifting cylinder 9 is operated. When more material is added into the lifting cylinder 9... When pressed, the gas pressure pushes the cylinder plunger downward, which in turn drives the cylinder shaft 1 downward. Since the metal fixing sleeve 2 at the bottom of the cylinder shaft 1 is connected to the scraper horizontal support 3, the scraper horizontal support 3 also moves downward. The scraper fixing block 4 at the left end of the scraper horizontal support 3 and the strip metal scraper 5 at the rear end move closer to the filter bag under the drive of the cylinder shaft 1. The strip metal scraper 5 is connected to the scraper horizontal support 3 through the scraper fixing block 4 and is fixed by multiple screws to ensure the stability of the connection. The blade edge at the left end of the strip metal scraper 5 is blunted, which can avoid excessive damage to the filter bag when scraping the filter cake on the filter bag, and also ensure the safety of the scraper during use. When the strip metal scraper 5 contacts the filter bag, as the centrifuge drum rotates, the strip metal scraper 5 can effectively scrape off the filter cake on the filter bag.

[0022] like Figure 1 and Figure 2As shown, a sealing sleeve 8 is fixed to the outside of the bottom end of the lifting cylinder 9. A fixing flange 7 is provided on the outside of the bottom end of the sealing sleeve 8. The fixing flange 7 is fixed to the top of the end cover of the bag scraper centrifuge by multiple screws. The sealing sleeve 8 on the outside of the bottom end of the lifting cylinder 9 serves to seal and fix it, ensuring that the lifting cylinder 9 is isolated from the external environment and preventing dust, impurities, etc. from entering the interior of the lifting cylinder 9 and affecting its normal operation. The fixing flange 7 at the bottom end of the sealing sleeve 8 is fixed to the top of the end cover of the bag scraper centrifuge by multiple screws, providing a stable installation base for the entire scraper device, ensuring that the scraper device will not shake or shift during the operation of the centrifuge, thereby ensuring the accuracy and stability of the scraping operation. The lifting cylinder 9 is equipped with an external cylinder connector 10 at its top. The internal pressure of the lifting cylinder 9 can be increased and decreased through the external cylinder connector 10. Increasing the pressure inside the lifting cylinder 9 can push the cylinder plunger downward, and decreasing the pressure inside the lifting cylinder 9 can pull the cylinder plunger upward. The pressure change inside the lifting cylinder 9 determines the direction of movement of the cylinder plunger. When it is necessary to lower the strip metal scraper 5 for scraping, the internal pressure of the lifting cylinder 9 is increased to push the cylinder plunger downward. When the scraping is completed and it is necessary to raise the strip metal scraper 5, the pressure is decreased by depressurizing the external cylinder connector 10. At this time, the pressure inside the lifting cylinder 9 decreases, and the external air pressure pulls the cylinder plunger upward, thereby moving the strip metal scraper 5 away from the filter bag.

[0023] like Figure 1 , Figure 3 and Figure 4 As shown, an auxiliary scraping device 6 is provided on the outside of the scraper horizontal support 3. The auxiliary scraping device 6 includes a screw fixing sleeve 11, a horizontal tilting bracket 12, and a metal fixing plate 13. The screw fixing sleeve 11 is sleeved on the outside of the scraper horizontal support 3. Both the upper and lower ends of the screw fixing sleeve 11 are fixedly connected to the scraper horizontal support 3 by screws. A horizontal tilting bracket 12 is provided on the outer wall of the rear end of the scraper horizontal support 3. The rear end of the horizontal tilting bracket 12 tilts and extends to the left rear side. A metal fixing plate 13 is provided at the rear end of the horizontal tilting bracket 12. The horizontal tilting bracket 12 is connected to the screw fixing sleeve 11 and the metal fixing plate 13. All the fixed plates 13 are fixedly connected by welding. This connection method ensures the stability of the auxiliary scraping device 6 on the horizontal support 3 of the scraper, and will not loosen or shift during operation. The horizontal tilting support 12 is connected to the screw fixing sleeve 11 and the metal fixed plate 13 by welding. The welding method ensures the strength of the connection and can withstand the various forces during operation. The metal fixed plate 13 serves as the installation base for the auxiliary scraping strip 14 and is fixedly connected to the auxiliary scraping strip 14 by multiple screws, which also ensures the stability of the auxiliary scraping strip 14.

[0024] like Figure 1 , Figure 3 and Figure 4As shown, the auxiliary scraping device 6 also includes an auxiliary scraping strip 14 and auxiliary scraping bristles 15. The auxiliary scraping strip 14 is located at the rear end of the metal fixing plate 13. The auxiliary scraping strip 14 is fixedly connected to the metal fixing plate 13 by multiple screws. The outer wall of the rear end of the auxiliary scraping strip 14 is densely covered with auxiliary scraping bristles 15. The auxiliary scraping device 6 works in conjunction with the strip-shaped metal scraper 5 to jointly complete the cleaning task of the filter bag during the operation of the bag scraper centrifuge. The strip-shaped metal scraper 5 is mainly responsible for scraping off large pieces of filter cake on the filter bag, while the auxiliary scraping device 6 performs a detailed secondary cleaning of the filter bag through the auxiliary scraping bristles 15, ensuring a higher degree of cleanliness of the inner wall of the filter bag and improving the cleaning effect and working efficiency of the entire scraper device. The auxiliary scraping bristles 15 are soft bristles. The outer wall of the rear end of the auxiliary scraping strip 14 and the outer wall of the left end of the strip-shaped metal scraper 5 are at the same level. On a circular trajectory, the vertical height of the auxiliary scraper 14 is equal to that of the strip metal scraper 5. When the strip metal scraper 5 contacts the filter bag and performs scraping operation under the action of the lifting cylinder 9, since the outer wall of the rear end of the auxiliary scraper 14 and the outer wall of the left end of the strip metal scraper 5 are on the same circular trajectory, and the vertical height of the auxiliary scraper 14 is equal to that of the strip metal scraper 5, the auxiliary scraper 14 can approach the filter bag synchronously with the strip metal scraper 5. The auxiliary scraping bristles 15 densely distributed on the outer wall of the rear end of the auxiliary scraper 14 are soft bristles. During the rotation of the filter bag, the soft bristles can fully contact the inner wall of the filter bag to further clean the fine particles that may remain after the strip metal scraper 5 scrapes off the filter cake. The characteristics of the soft bristles can ensure the cleaning effect without causing excessive scraping damage to the filter bag, thus extending the service life of the filter bag.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A scraper device for a bag-scraping centrifuge, comprising a lifting cylinder (9) and a cylinder plunger disposed inside the lifting cylinder (9), wherein a cylinder shaft (1) is disposed at the bottom end of the cylinder plunger, the bottom end of the cylinder shaft (1) is exposed below the bottom end of the lifting cylinder (9), a metal fixing sleeve (2) is fixed to the outside of the bottom end of the cylinder shaft (1), a scraper horizontal bracket (3) is welded to the outer wall of the left end of the metal fixing sleeve (2), a scraper fixing block (4) is disposed at the left end of the scraper horizontal bracket (3), and a strip-shaped metal scraper (5) is disposed at the rear end of the scraper fixing block (4), characterized in that: An auxiliary scraping device (6) is provided on the outside of the horizontal support (3) of the scraper; The auxiliary scraping device (6) includes a screw fixing sleeve (11), a horizontal tilting bracket (12), and a metal fixing plate (13). The screw fixing sleeve (11) is sleeved on the outside of the scraper horizontal bracket (3). The upper and lower ends of the screw fixing sleeve (11) are fixedly connected to the scraper horizontal bracket (3) by screws. The horizontal tilting bracket (12) is provided on the outer wall of the rear end of the scraper horizontal bracket (3). The rear end of the horizontal tilting bracket (12) extends tilted to the left rear side. The rear end of the horizontal tilting bracket (12) is provided with a metal fixing plate (13). The horizontal tilting bracket (12), the screw fixing sleeve (11), and the metal fixing plate (13) are all fixedly connected by welding.

2. The scraper device for a bag-scraping centrifuge according to claim 1, characterized in that: The auxiliary scraping device (6) further includes an auxiliary scraping strip (14) and auxiliary scraping bristles (15). The auxiliary scraping strip (14) is provided at the rear end of the metal fixing plate (13). The auxiliary scraping strip (14) is fixedly connected to the metal fixing plate (13) by multiple screws. The outer wall of the rear end of the auxiliary scraping strip (14) is densely covered with auxiliary scraping bristles (15).

3. The scraper device for a bag-scraping centrifuge according to claim 2, characterized in that: The auxiliary scraper bristles (15) are soft bristles. The outer wall of the rear end of the auxiliary scraper strip (14) and the outer wall of the left end of the strip metal scraper (5) are on the same circular trajectory. The vertical height of the auxiliary scraper strip (14) is equal to the vertical height of the strip metal scraper (5).

4. The scraper device for a bag-scraping centrifuge according to claim 1, characterized in that: The scraper fixing block (4) and the strip metal scraper (5) are fixedly connected by multiple screws. The left end of the strip metal scraper (5) is blunted, and the left end of the strip metal scraper (5) is exposed on the left side of the left end of the scraper fixing block (4).

5. A scraper device for a bag-scraping centrifuge according to claim 1, characterized in that: The lifting cylinder (9) is fixed with a sealing sleeve (8) at the bottom. The sealing sleeve (8) is provided with a fixing flange (7) at the bottom. The fixing flange (7) is fixed to the top of the end cover of the bag scraper centrifuge by multiple screws.

6. The scraper device for a bag-scraping centrifuge according to claim 1, characterized in that: The top of the lifting cylinder (9) is provided with an external cylinder connector (10). The internal pressure of the lifting cylinder (9) can be increased and decreased through the external cylinder connector (10). The internal pressure of the lifting cylinder (9) can push the cylinder plunger downward, and the internal pressure of the lifting cylinder (9) can pull the cylinder plunger upward.

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