Bag pulling structure and bag pulling type discharging centrifugal machine

Abstract

The utility model discloses a bag pulling structure and a bag pulling type discharging centrifugal machine, and belongs to the technical field of discharging centrifugal equipment, the bag pulling structure comprises a filter bag, the upper end of the filter bag is provided with an upper opening, and the lower end of the filter bag is provided with a lower opening; the drawstring strips are fixed on the filter bag; the plurality of drawstring strips are distributed along the circumferential direction; the drawstring strip comprises a vertical section and an inclined section arranged at the lower end of the vertical section; the drawstring strip can be elastically deformed; the crushing strips are fixed in the filter bag; the crushing strips are distributed in the circumferential direction; according to the utility model, the crushing strips are arranged on the inner wall of the filter bag and are convexly arranged, and the crushing strips collide with a filter cake in the process of crushing the filter cake, so that a notch can be effectively formed in the filter cake with higher hardness by knocking, the filter cake is further efficiently crushed, rapid and residue-free discharging is realized, the structure is simple, and the operation is simple and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of unloading centrifugal equipment, in particular to a bag pulling structure and a bag pulling type unloading centrifuge. Background Art

[0002] Bag-type unloading centrifuges are widely used and are one of the key separation equipment in the chemical and pharmaceutical industries; filter bags are important accessories for bag-type unloading centrifuges.

[0003] The working principle of the bag-type unloading centrifuge is that a filter bag is installed in the drum on the main shaft, and the main shaft drives the drum and the filter bag to rotate, which can separate the solid and liquid materials in the filter bag, and the solid materials remaining in the filter bag form a filter cake; the lower end of the filter bag is connected to a bag-type cover that drives it to move along the axial direction of the main shaft. The filter bag is deformed under the drive of the bag-type cover, and cooperates with the scraper on the main shaft to more efficiently break the filter cake and make the material adhering to the inner wall of the filter bag loose and fall off, so as to facilitate unloading; however, when the viscosity of the material is high and the particles are fine, the hardness of the formed filter cake is high, and it is difficult to break the filter cake only by driving the deformation of the filter bag by the bag-type cover. It is often necessary to manually remove the filter cake in the filter bag, which makes the unloading time longer, seriously affecting the working efficiency of the bag-type unloading centrifuge; at the same time, the filter cake may also retain toxic and harmful gases, and there will be safety hazards when it is manually removed.

[0004] Therefore, the research and development of a bag-pulling structure and a bag-pulling unloading centrifuge that can efficiently crush filter cakes with high hardness and unload quickly and without residue is a problem that needs to be solved urgently at this stage. Utility Model Content

[0005] In order to solve the problems existing in the prior art, the utility model provides a bag-pulling structure and a bag-pulling unloading centrifuge. The crushing bars on the inner wall of the filter bag are protruding. During the process of crushing the filter cake, the crushing bars collide with the filter cake, which can effectively knock out notches on the filter cake with higher hardness, thereby efficiently crushing the filter cake, realizing fast and residue-free unloading, with a simple structure and easy operation.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] On the one hand, the utility model provides a bag pulling structure, comprising:

[0008] A filter bag, wherein the upper end of the filter bag has an upper opening, and the lower end of the filter bag has a lower opening;

[0009] A plurality of drawstring strips, wherein the drawstring strips are fixed to the filter bag; the plurality of drawstring strips are distributed along the circumferential direction; the drawstring strips include a vertical section and an inclined section arranged at the lower end of the vertical section; the drawstring strips are elastically deformable;

[0010] A plurality of breaking strips are fixed in the filter bag; the plurality of breaking strips are distributed along the circumferential direction.

[0011] As a preferred technical solution, a first support hoop is provided at the upper opening; a second support hoop is provided at the lower opening; and the inclined section extends in a direction close to the second support hoop.

[0012] As a preferred technical solution, a horizontal section is provided at the upper end of the vertical section, and the horizontal section extends in a direction close to the first support hoop; and a third support hoop is provided on the filter bag at the connection between the vertical section and the horizontal section.

[0013] As a preferred technical solution, the horizontal section, the vertical section and the inclined section are integrally formed;

[0014] And / or, centers of the first support hoop, the second support hoop and the third support hoop are all located on the axis of the filter bag.

[0015] As a preferred technical solution, the first support hoop, the second support hoop and the third support hoop are all circular;

[0016] And / or, the filter bag is provided with a plurality of circumferentially evenly distributed hanging buckles located at the third support hoop, the hanging buckles correspond one-to-one to the drawstring strips, and the hanging buckles are provided at the connection between the vertical section and the horizontal section.

[0017] As a preferred technical solution, the number of the crushing bars is set to three, and the three crushing bars are evenly distributed along the circumferential direction.

[0018] As a preferred technical solution, the crushing bar is arranged vertically, and the crushing bar is arranged at a position of the filter bag corresponding to the vertical section;

[0019] And / or, the crushing bar is fixedly connected to the vertical section.

[0020] As a preferred technical solution, the width of the crushing strip along the circumferential direction does not exceed 20 mm;

[0021] And / or, the protruding height of the crushing strip from the inner wall of the filter bag is set to 2-20 mm.

[0022] As a preferred technical solution, the cross-section of the crushing bar is set to be one or more of a circle, a triangle, and a rectangle.

[0023] In the second aspect, the utility model provides a bag-pulling unloading centrifuge, comprising a main shaft, a drum being provided on the main shaft, and the aforementioned bag-pulling structure being provided inside the drum; the upper end of the filter bag is fixedly connected to the top of the drum, the drawstring strip is fitted to the inner wall of the drum, and the lower opening is connected to a bag-pulling cover, which can drive the lower opening to move in a vertical direction.

[0024] The beneficial effects of the utility model are as follows:

[0025] The breaking bar of the utility model is arranged on the inner wall of the filter bag and protrudes. In the process of breaking the filter cake, the breaking bar collides with the filter cake, which can effectively knock out a notch on the filter cake with higher hardness, and then efficiently break the filter cake, realizing fast and residue-free unloading, with simple structure and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of a bag pull structure of the utility model;

[0027] Figure 2 for Figure 1 A top view of

[0028] Figure 3 for Figure 2 A magnified image of area A;

[0029] Figure 4 for Figure 2 Cross-sectional view along the BB axis.

[0030] In the figure: 1-filter bag, 11-upper opening, 12-lower opening, 13-first support hoop, 14-second support hoop, 15-hanging buckle, 2-pull strip, 21-vertical section, 22-inclined section, 23-horizontal section, 3-crushing strip. DETAILED DESCRIPTION

[0031] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0032] First, please refer to Figure 1-Figure 4, which is an embodiment of a bag pulling structure provided by the utility model, comprises a filter bag 1, wherein an upper opening 11 is provided at the upper end of the filter bag 1, and a lower opening 12 is provided at the lower end; a plurality of draw strips 2 are provided on the filter bag 1, and the draw strips 2 comprise a vertical section 21 and an inclined section 22 arranged at the lower end of the vertical section 21, and the plurality of draw strips 2 are evenly spaced along the circumferential direction, and are used for stably supporting the filter bag 1, so that the shape of the filter bag 1 fits with the inner wall of the drum when not subjected to external force; the draw strips 2 can be elastically deformed, so that the filter bag 1 can better loosen and drop the material adhered to the inner wall of the filter bag 1 during the deformation process, so as to ensure that there is no residue when unloading; a plurality of crushing strips 3 fixed in the filter bag 1 are protrudingly arranged and circumferentially distributed, and in the process of crushing the filter cake, the crushing strips 3 collide with the filter cake, which can effectively knock out a notch on the filter cake with higher viscosity and hardness, and then efficiently crush the filter cake, so as to achieve fast and residue-free unloading, with a simple structure and easy operation.

[0033] For clarification, please refer to Figure 1 Long strips of cloth bags are sewn at the positions of the filter bag 1 corresponding to the drawstring strips 2 and the crushing strips 3, and the drawstring strips 2 and the crushing strips 3 are fixedly connected to the filter bag 1 by passing through the cloth bags.

[0034] It should be noted that the circumferential direction in the present invention is based on the axis of the filter bag 1 and the main shaft.

[0035] In this embodiment, please refer to Figure 1-Figure 4 A first support hoop 13 is provided at the upper opening 11 of the filter bag 1, and the first support hoop 13 can keep the upper opening 11 in a suitable shape; similarly, a second support hoop 14 is provided at the lower opening 12, and the second support hoop 14 can keep the lower opening 12 in a suitable shape; further, the inclined section 22 extends in a direction close to the second support hoop 14, so that the inner diameter of the lower end of the filter bag 1 gradually decreases to match the shape of the drum. On the one hand, it can ensure that the drawstring strip 2 fits the inner wall of the drum. On the other hand, when the lower end of the filter bag 1 moves up and down driven by the drawstring cover, the drawstring strip 2 The strip 2 can more easily deform at the connection between the inclined section 22 and the vertical section 21, so that the filter bag 1 is deformed accordingly, thereby improving the crushing effect of the filter cake; specifically, the first support hoop 13, the second support hoop 14 and the third support hoop are all circular, and the circular support hoop can effectively stabilize the shape of the upper opening 11 and the lower opening 12, and is also convenient for installation and positioning in the drum; in other embodiments, the first support hoop 13, the second support hoop 14 and the third support hoop can also be set to an elliptical or polygonal shape, so as to be able to be stably positioned in the drum and facilitate loading and unloading.

[0036] Based on the above examples, please refer to Figure 1-Figure 4, a horizontal section 23 is provided at the upper end of the vertical section 21, and the horizontal section 23 extends in the direction close to the first support hoop 13; a third support hoop is provided at the connection between the vertical section 21 and the horizontal section 23 of the filter bag 1, and the first support hoop 13 and the third support hoop are located in the same horizontal plane. The third support hoop cooperates with the first support hoop 13, so that the upper end of the filter bag 1 can form an annular horizontal plane, which fits with the inner wall surface of the drum, thereby improving the positioning effect of the filter bag 1 in the drum; specifically, a plurality of circumferentially uniformly distributed hanging buckles 15 are provided at the third support hoop on the filter bag 1, and the hanging buckles 15 correspond to the drawstring strips 2 one by one. The hanging buckles 15 are provided at the connection between the vertical section 21 and the horizontal section 23, and hooks are provided at the positions corresponding to the hanging buckles 15 in the drum, and the hooks are connected to the hanging buckles 15. Through the hooks and the hanging buckles 15, the upper end of the filter bag 1 can be conveniently fixedly connected to the inner wall of the drum, thereby ensuring that the filter bag 1 can stably rotate with the drum.

[0037] For clarification, please refer to Figure 1 The centers of the first support hoop 13, the second support hoop 14 and the third support hoop are all located on the axis of the filter bag 1, which can ensure that the shape of the filter bag 1 is the same as the internal shape of the drum, and the filter bag 1 can produce stable deformation during the process of crushing the filter cake.

[0038] It should be noted that the horizontal section 23, the vertical section 21 and the inclined section 22 are integrally formed, and the drawstring strip 2 is particularly elastic, which facilitates production. When the bag cover drives the lower end of the filter bag 1 to move, the drawstring strip 2 can stably deform. Specifically, the drawstring strip 2 is preferably made of rubber material.

[0039] In this embodiment, please refer to Figure 1-Figure 4 The number of the pull strips 2 is set to twenty-four, the number of the crushing strips 3 is set to three, and the three crushing strips 3 are evenly distributed along the circumference. When the filter bag 1 rotates and deforms, the surface of the filter cake in the filter bag 1 can randomly collide with the crushing strips 3, and the crushing strips 3 can knock out notches on the filter cake, thereby improving the crushing speed and crushing effect of the filter cake; specifically, the crushing strips 3 are vertically arranged, which can increase the collision probability of the crushing strips 3 and the filter cake; the crushing strips 3 are arranged at the position of the filter bag 1 corresponding to the vertical section 21, and the crushing strips 3 are fixedly connected to the vertical section 21, so that the crushing strips 3 can be more firmly fixed in the filter bag 1; in other embodiments, the number of the pull strips 2 and the crushing strips 3 can also be set to other values, so as to stably support the filter bag 1 and efficiently crush the filter cake; the crushing strips 3 can also be inclined or horizontally arranged, so as to quickly crush the filter cake.

[0040] On the basis of the above-mentioned embodiment, the width of the crushing bar 3 along the circumferential direction does not exceed 20mm, so as to ensure that when the protrusion formed by the crushing bar 3 collides with the surface of the filter cake, a greater pressure can be generated on the surface of the filter cake, thereby improving the crushing effect on the filter cake; further, the protruding height of the crushing bar 3 from the inner wall of the filter bag 1 is set to 2-20mm; when the protruding height of the crushing bar 3 is lower than 2mm, the crushing effect is poor; at the same time, the protruding height of the crushing bar 3 should be as low as possible below 20mm to avoid the crushing bar 3 affecting the action of the scraper; for further information, please refer to Figure 3 The cross section of the crushing bar 3 is set to be circular, which is convenient for production while ensuring the crushing effect; in other embodiments, the cross section of the crushing bar 3 can be set to be triangular or rectangular, or the crushing bar 3 can also be connected by several sections with circular, triangular or rectangular cross sections, which can effectively crush the filter cake.

[0041] Secondly, the utility model provides a bag-pulling unloading centrifuge, comprising a main shaft, a drum is arranged on the main shaft, the main shaft can drive the drum to rotate therewith; the drum is provided with the aforementioned bag-pulling structure; the upper end of the filter bag 1 is fixedly connected to the top of the drum, the drawstring strip 2 is in contact with the inner wall of the drum, the filter bag 1 rotates with the drum, the solid-liquid separation of the material in the filter bag 1 can be achieved, and the solid material remaining in the filter bag 1 forms a filter cake; the lower mouth 12 of the filter bag 1 is connected to a bag-pulling cover, the bag-pulling cover can drive the lower mouth 12 to move in the vertical direction, so that the filter bag 1 produces regular deformation in the vertical direction, so that the filter cake in the filter bag 1 collides with the crushing strip 3 in the filter bag 1, the crushing strip 3 cooperates with the scraper on the main shaft, can quickly crush the filter cake and discharge, no residue will appear in the filter bag 1, and the unloading speed and work efficiency are improved.

[0042] Please refer to Figure 1-Figure 4 , the specific working process of the utility model is as follows:

[0043] The upper end of the filter bag 1 is fixedly connected to the top of the drum by the first support hoop 13 and the third support hoop; the main shaft drives the drum and the filter bag 1 to rotate, and under the action of centrifugal force, the solid and liquid materials in the filter bag 1 can be separated, and the solid materials remaining in the filter bag 1 form an egg-shaped filter cake; when the viscosity of the material is high and the particles are fine, the egg-shaped filter cake formed has a high hardness, a smooth surface and no weak points;

[0044] When the filter cake is crushed, the second support hoop 14 moves up and down driven by the bag cover, and the filter cake surface collides with the crushing bar 3, which can knock out a notch on the filter cake surface and create a weak point on the filter cake surface, greatly accelerating the crushing speed and crushing effect of the filter cake and achieving rapid unloading without residue.

[0045] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A bag pull structure, characterized in that: include: A filter bag (1), wherein the upper end of the filter bag (1) has an upper opening (11), and the lower end of the filter bag (1) has a lower opening (12); A plurality of drawstring strips (2), wherein the drawstring strips (2) are fixed to the filter bag (1); the plurality of drawstring strips (2) are distributed along the circumferential direction; the drawstring strips (2) include a vertical section (21) and an inclined section (22) provided at the lower end of the vertical section (21); the drawstring strips (2) are capable of elastic deformation; A plurality of crushing bars (3), wherein the crushing bars (3) are fixed in the filter bag (1); and the plurality of crushing bars (3) are distributed along the circumferential direction.

2. A bag pull structure according to claim 1, characterized in that: A first support hoop (13) is provided at the upper opening (11); a second support hoop (14) is provided at the lower opening (12); and the inclined section (22) extends in a direction close to the second support hoop (14).

3. A bag pull structure according to claim 2, characterized in that: A horizontal section (23) is provided at the upper end of the vertical section (21), and the horizontal section (23) extends in a direction close to the first support hoop (13); the filter bag (1) is provided with a third support hoop at the connection between the vertical section (21) and the horizontal section (23).

4. A bag pull structure according to claim 3, characterized in that: The horizontal section (23), the vertical section (21) and the inclined section (22) are integrally formed; And / or, the centers of the first support hoop (13), the second support hoop (14) and the third support hoop are all located on the axis of the filter bag (1).

5. The bag pull structure according to claim 3, characterized in that: The first support hoop (13), the second support hoop (14) and the third support hoop are all circular; And / or, the filter bag (1) is provided with a plurality of circumferentially evenly distributed hanging buckles (15) located at the third support hoop, the hanging buckles (15) correspond one-to-one to the drawstring strips (2), and the hanging buckles (15) are provided at the connection between the vertical section (21) and the horizontal section (23).

6. The bag pull structure according to claim 1, characterized in that: The number of the crushing bars (3) is set to three, and the three crushing bars (3) are evenly distributed along the circumferential direction.

7. A bag pull structure according to claim 1 or 6, characterized in that: The crushing bar (3) is arranged vertically, and the crushing bar (3) is arranged at a position of the filter bag (1) corresponding to the vertical section (21); And / or, the crushing bar (3) is fixedly connected to the vertical section (21).

8. A bag pull structure according to claim 1 or 6, characterized in that: The width of the crushing strip (3) in the circumferential direction does not exceed 20 mm; And / or, the protruding height of the crushing strip (3) from the inner wall of the filter bag (1) is set to 2-20 mm.

9. A bag pull structure according to claim 1 or 6, characterized in that: The cross section of the crushing bar (3) is configured to be one or more of a circle, a triangle, and a rectangle.

10. A bag-type unloading centrifuge, characterized in that: It comprises a main shaft, on which a drum is arranged, and inside the drum is arranged a bag pulling structure as described in any one of claims 1 to 9; the upper end of the filter bag (1) is fixedly connected to the top of the drum, the drawstring strip (2) is fitted with the inner wall of the drum, and the lower opening (12) is connected to a bag pulling cover, and the bag pulling cover can drive the lower opening (12) to move in a vertical direction.

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