Filter bag outward-turning discharging structure and centrifugal machine

Abstract

The utility model relates to the technical field of centrifugal machines, in particular to a filter bag outward-turning discharging structure and a centrifugal machine, and the filter bag outward-turning discharging structure comprises a hollow main shaft; the first end of the outer rotary drum is coaxially and fixedly arranged at the first end of the hollow main shaft, and the outer rotary drum is provided with a containing cavity; the push rod penetrates through the hollow main shaft in a sliding mode and is connected with the hollow main shaft in a rotation stopping mode, and the two ends of the push rod stretch out relative to the hollow main shaft; the inner rotary drum is located in the containing cavity, the first end of the inner rotary drum and the first end, close to the outer rotary drum, of the push rod are coaxially and fixedly arranged, and the second end of the inner rotary drum blocks the opening of the containing cavity; one end of the filter bag is connected with the second end of the outer drum, and the other end of the filter bag is connected with the first end of the inner drum; and the first driving structure is in transmission connection with the push rod. According to the utility model, the filter cake can be automatically discharged, so that the damage to the filter cake is avoided, and the performance of the filter cake material is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to centrifuge technical field especially relates to a filter bag everted unloading structure and centrifuge. BACKGROUND

[0002] Centrifuge is the laboratory and industrial equipment that utilizes centrifugal force to realize solid-liquid or liquid-liquid separation, is widely used in scientific research, medicine, chemical industry, food and other fields.Its core principle is to separate the components of different densities in the mixture through high-speed rotation to generate centrifugal force, has the characteristics of high efficiency and precision.

[0003] Among them, centrifuge filter bag unloading is through filter bag as filter medium realizes solid-liquid separation and completes the key process of unloading.The core principle is to use centrifugal force to discharge the liquid phase in the suspension through the filter bag, and the solid phase forms a filter cake on the filter bag, and finally is unloaded by mechanical means.But the mechanical method can cause damage to the filter cake, which affects the filter cake material formed by centrifugation.

[0004] Therefore, a filter bag everted unloading structure and centrifuge are needed to solve the above problems. INVENTION CONTENTS

[0005] The utility model aims at providing a filter bag everted unloading structure and centrifuge, which can realize automatic unloading of filter cake, thereby avoiding damage to the filter cake and ensuring the performance of the filter cake material.

[0006] To achieve this purpose, the utility model adopts the following technical scheme:

[0007] The filter bag everted unloading structure comprises:

[0008] A hollow main shaft;

[0009] An outer drum, the first end of the outer drum is coaxially fixed on the first end of the hollow main shaft, and the outer drum has a receiving cavity;

[0010] A push rod, the push rod is slidably arranged in the hollow main shaft, and the push rod is rotationally connected with the hollow main shaft, and the two ends of the push rod extend out of the hollow main shaft;

[0011] An inner drum, the inner drum is located in the receiving cavity, and the first end of the inner drum is coaxially fixed with the first end of the push rod close to the first end of the outer drum, and the second end of the inner drum blocks the opening of the receiving cavity;

[0012] A filter bag, one end of the filter bag is connected with the second end of the outer drum, and the other end of the filter bag is connected with the first end of the inner drum;

[0013] A first driving structure is in transmission connection with the push rod, and the first driving structure is capable of driving the push rod to move along the axial direction of the hollow main shaft, so that the first end of the inner rotating drum extends out of the accommodating cavity, and the inner surface of the filter bag is everted outwards.

[0014] In some embodiments, the first driving structure comprises a first driving assembly, a lead screw, and a transmission nut assembly, the transmission nut assembly is coaxially fixedly arranged at the second end of the push rod, the lead screw is in threaded connection with the transmission nut assembly, and the first driving assembly is in transmission connection with the lead screw, and the first driving assembly is capable of driving the lead screw to rotate, so that the transmission nut assembly drives the push rod to move relative to the hollow main shaft.

[0015] In some embodiments, the transmission nut assembly comprises a main nut, the main nut is connected with the second end of the push rod, and the main nut is in threaded connection with the lead screw.

[0016] In some embodiments, the transmission nut assembly further comprises a secondary nut, the secondary nut is in threaded connection with the lead screw, the main nut is connected with the secondary nut through a connecting pin, and an elastic member is arranged between the main nut and the secondary nut.

[0017] In some embodiments, a guide assembly is arranged between the push rod and the hollow main shaft, the guide assembly is capable of enabling the push rod to rotate with the hollow main shaft and move along the axial direction of the hollow main shaft.

[0018] In some embodiments, a guide groove is arranged on the hollow main shaft along the axial direction of the hollow main shaft, the guide assembly comprises a guide flat key and a mounting ring, the guide flat key is fixedly arranged on the push rod and located in the guide groove, and the mounting ring is sleeved on the push rod and connected with the guide flat key.

[0019] In some embodiments, the inner rotating drum comprises a fixed plate and an end sealing plate, the fixed plate and the end sealing plate are arranged in parallel and spaced apart along the axial direction of the hollow main shaft, the fixed plate is connected with the end sealing plate through a connecting rod, the fixed plate is connected with the first end of the push rod, and the end sealing plate is used for sealing the opening of the accommodating cavity.

[0020] In some embodiments, a filter cloth pressing ring is arranged on the fixed plate, and the other end of the filter bag is clamped between the fixed plate and the filter cloth pressing ring.

[0021] In some embodiments, a second driving assembly is further included, the second driving assembly is in transmission connection with the hollow main shaft, and the second driving assembly is used for driving the hollow main shaft to rotate about the axis thereof.

[0022] A centrifuge includes a mounting housing and a filter bag everted discharge structure as described above, which is arranged in the mounting housing.

[0023] The present application has the advantages that:

[0024] The filter bag everted discharge structure has the advantages that: the first end of the hollow spindle is fixedly provided with an outer rotating drum, the push rod is slidably arranged in the hollow spindle and rotationally connected with the hollow spindle, the two ends of the push rod extend out of the hollow spindle, the first end of the inner rotating drum is coaxially fixed with the first end of the push rod, the filter bag is arranged between the outer rotating drum and the inner rotating drum, the first driving structure is drivingly connected with the push rod, and the first driving structure can drive the push rod to move, so that the inner surface of the filter bag is everted.

[0025] The centrifuge has the advantages that: the filter cake can be automatically discharged, the filter cake is not damaged, and the performance of the filter cake material is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art according to the contents of the embodiments of the present application and the drawings without any creative effort.

[0027] Figure 1 is a sectional view of the filter bag everted discharge structure of the present application;

[0028] Figure 2 is Figure 1 is an enlarged view of part A in FIG.

[0029] Figure 3 is Figure 1 is an enlarged view of part B in FIG.

[0030] In the drawings:

[0031] 1, hollow spindle; 11, guide assembly; 111, guide key; 112, mounting ring; 2, outer drum; 21, compression ring; 3, push rod; 4, inner drum; 41, fixed plate; 411, filter cloth compression ring; 42, end sealing plate; 43, connecting rod; 5, filter bag; 6, first driving assembly; 61, first driven pulley; 62, hollow shaft; 7, transmission nut assembly; 71, main nut; 72, auxiliary nut; 73, elastic member; 8, screw rod; 9, second driving assembly; 91, second driven pulley. DETAILED DESCRIPTION

[0032] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above-described accompanying drawings.

[0033] In this application, the terms "including", "containing", "having" or any other similar words are intended to encompass non-exclusive inclusions, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0034] In this application, the terms "connection", "combination", "coupling", "mounting" can be direct connection, combination, coupling or mounting, or indirect connection, combination, coupling or mounting. Among them, for example, direct connection refers to the connection of two parts or components without the need for an intermediate part, and indirect connection refers to the connection of two parts or components with at least one intermediate part. In addition, "connection" and "coupling" are not limited to physical or mechanical connection or coupling, and can include electrical connection or coupling.

[0035] In this application, those of ordinary skill in the art will understand that the functions performed by the components can be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by the parts can also be performed by one part, one component, or multiple parts in combination.

[0036] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and the like are described in the orientation and positional relationship shown in the drawings, and should not be understood as limiting the embodiments of the present application. In addition, it is also understood in the context that when referring to one element connected to another element "on" or "under", it can be directly connected to another element "on" or "under" or indirectly connected to another element "on" or "under" through an intermediate element. It should also be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like not only represent the positive direction, but also can be understood as the side direction. For example, the lower side can include the directly below, the left below, the right below, the front below and the back below and the like.

[0037] In the process of centrifuge working, in order to realize automatic unloading of filter cake, so as to avoid damage to the filter cake, ensure the performance of filter cake material, such as Figures 1-3 As shown in the utility model discloses a filter bag outturn unloading structure. Filter bag outturn unloading structure includes hollow main shaft 1, outer drum 2, push rod 3, inner drum 4, filter bag 5 and first drive structure.

[0038] Wherein, the first end coaxial fixed setting of outer drum 2 is at the first end of hollow main shaft 1, and outer drum 2 has accommodating cavity. Push rod 3 is slidably arranged in hollow main shaft 1, and push rod 3 is rotationally connected with hollow main shaft 1, and the two ends of push rod 3 extend out of hollow main shaft 1. Inner drum 4 is located in the accommodating cavity, and the first end of inner drum 4 is coaxially fixed with the first end of push rod 3 close to outer drum 2, and the second end of inner drum 4 blocks the opening of the accommodating cavity. One end of filter bag 5 is connected with the second end of outer drum 2, and the other end of filter bag 5 is connected with the first end of inner drum 4. The first drive structure is drivingly connected with the push rod 3, and the first drive structure can drive the push rod 3 to move along the axial direction of the hollow main shaft 1, so that the first end of the inner drum 4 extends out of the accommodating cavity, and the inner surface of the filter bag 5 is turned outwards.

[0039] When the centrifuge completes the centrifugal operation, the first drive structure drives the push rod 3 to move along the axial direction of the hollow main shaft 1, thereby driving the inner drum 4 to extend out of the accommodating cavity, and in the process, the inner surface of the filter bag 5 is turned outwards, so that the filter cake material attached to the inner surface of the filter bag 5 leaks out for automatic unloading. Through the above-mentioned mode, damage to the filter cake can be avoided, and the performance of the filter cake material can be ensured.

[0040] In some embodiments, the first driving structure comprises the first driving assembly 6, the lead screw 8 and the transmission nut assembly 7, the transmission nut assembly 7 is coaxially fixedly arranged at the second end of the push rod 3, the lead screw 8 is screwed with the transmission nut assembly 7, the first driving assembly 6 is in transmission connection with the lead screw 8, and the first driving assembly 6 can drive the lead screw 8 to rotate, so that the transmission nut assembly 7 drives the push rod 3 to move relative to the hollow spindle 1. The first driving assembly 6 drives the lead screw 8 to rotate, so that the transmission nut assembly 7 moves along the extension direction of the lead screw 8, the transmission nut assembly 7 drives the push rod 3 to move, and the inner rotating drum 4 extends out of or retracts into the accommodating cavity. In this embodiment, the first driving assembly 6 adopts belt transmission, the first driving pulley is connected with the first driven pulley 61 through the first belt, and the first driven pulley 61 is in transmission connection with the lead screw 8. The first driving pulley is driven by the motor to rotate, and the first driving pulley drives the first driven pulley 61 to rotate through the first belt. The first driven pulley 61 is fixedly sleeved on the hollow shaft 62, the lead screw 8 penetrates through the hollow shaft 62, and the lead screw 8 is connected with the hollow shaft 62 through a key. The first driven pulley 61 can drive the lead screw 8 to rotate through the hollow shaft 62, and the lead screw 8 drives the push rod 3 to move through the transmission nut assembly 7. In the above manner, the movement of the push rod 3 can be accurately controlled by the cooperation of the lead screw 8 and the transmission nut assembly 7, so that the filter bag 5 can be turned outwards and retracted inwards, and the filter cake can be unloaded conveniently. In other embodiments, a motor can be used in cooperation with gear transmission or chain transmission as the first driving assembly 6, which is not limited herein.

[0041] In some embodiments, the transmission nut assembly 7 comprises a main nut 71, the main nut 71 is connected with the second end of the push rod 3, and the main nut 71 is screwed with the lead screw 8. Through the cooperation of the main nut 71 and the lead screw 8, the main nut 71 moves relative to the lead screw 8 in the process of rotating the lead screw 8. The use of the lead screw nut structure can accurately control the movement distance of the push rod 3.

[0042] In some embodiments, the transmission nut assembly 7 further comprises a secondary nut 72, the secondary nut 72 is screwed with the lead screw 8, the main nut 71 and the secondary nut 72 are connected through a connecting pin, and an elastic element 73 is arranged between the main nut 71 and the secondary nut 72. Specifically, the axis of the connecting pin is parallel to the axis of the push rod 3, the main nut 71 and the secondary nut 72 are connected through the connecting pin, so that the secondary nut 72 can move along the axial direction of the connecting pin, the threads of the main nut 71 and the secondary nut 72 are tightly matched with the thread of the lead screw 8 through the spring, and the thread gap is eliminated. Thus, in the process of transmission, the noise generated by the collision between the threads can be eliminated, and the threads can be prevented from being damaged and failed due to the collision between the threads.

[0043] In some embodiments, a guide assembly 11 is arranged between the push rod 3 and the hollow spindle 1, which can rotate the push rod 3 with the hollow spindle 1 and move the push rod 3 along the axial direction of the hollow spindle 1. By arranging the guide assembly 11 to limit the movement of the push rod 3, the relative rotation between the push rod 3 and the hollow spindle 1 is eliminated, so that the push rod 3 rotates synchronously with the spindle, thereby enabling the inner rotating drum 4 to rotate synchronously with the outer rotating drum 2 to drive the filter bag 5 to rotate and realize the centrifugal operation. At the same time, the guide assembly 11 guides the push rod 3 to move axially relative to the spindle, thereby realizing the everted and retracted operation of the filter bag 5.

[0044] In some embodiments, a guide groove is arranged on the hollow spindle 1 along the axial direction of the hollow spindle 1, and the guide assembly 11 includes a guide flat key 111 and a mounting ring 112. The guide flat key 111 is fixedly arranged on the push rod 3 and located in the guide groove, and the mounting ring 112 is sleeved on the push rod 3 and connected with the guide flat key 111. By cooperating the guide flat key 111 with the guide groove, the push rod 3 can rotate with the spindle and move along the guide groove at the same time, thereby realizing the centrifugal operation and the everted unloading operation.

[0045] In some embodiments, the inner rotating drum 4 includes a fixed plate 41 and an end sealing plate 42, which are arranged in parallel and spaced apart along the axial direction of the hollow spindle 1. The fixed plate 41 is connected with the end sealing plate 42 through a connecting rod 43, and the fixed plate 41 is connected with the first end of the push rod 3. The end sealing plate 42 is used to block the opening of the accommodating cavity. By the above arrangement, when the centrifugal operation is needed, the end sealing plate 42 blocks the accommodating cavity, so that a closed accommodating cavity is formed between the end sealing plate 42 and the outer rotating drum 2, thereby preventing leakage from the gap between the end sealing plate 42 and the outer rotating drum 2 during the centrifugal operation. When the everted unloading operation is needed, the push rod 3 pushes the fixed plate 41 to move, thereby realizing the everted operation of the filter bag 5.

[0046] In some embodiments, a filter cloth pressing ring 411 is arranged on the fixed plate 41, and the other end of the filter bag 5 is clamped between the fixed plate 41 and the filter cloth pressing ring 411. By arranging the filter cloth pressing ring 411, the filter bag 5 can be fixed and installed conveniently. And during the centrifugal operation and the everted operation, the filter bag 5 will not fall off.

[0047] In some embodiments, a pressing ring 21 is also arranged at the second end of the outer rotating drum 2, and the filter bag 5 is clamped between the pressing ring 21 and the second end of the outer rotating drum 2. By arranging the pressing ring 21, the filter bag 5 can be fixed effectively, thereby ensuring that the filter bag 5 will not fall off during the operation.

[0048] In some embodiments, the filter bag everted discharge structure further comprises a second driving assembly 9, the second driving assembly 9 is in transmission connection with the hollow main shaft 1, and the second driving assembly 9 is used for driving the hollow main shaft 1 to rotate around the axis thereof. Specifically, in the embodiment, the second driving assembly 9 adopts a belt drive, a second driving pulley and a second driven pulley 91 are connected through a second belt, and the second driven pulley 91 is fixedly connected with the hollow main shaft 1. The second driving pulley is driven to rotate by the motor, and the second driving pulley drives the second driven pulley 91 to rotate through the second belt. In the process that the second driven pulley 91 rotates, the second driven pulley 91 drives the hollow main shaft 1 and the push rod 3 to rotate synchronously, and the transmission nut is driven to rotate synchronously under the action of friction, at this time, the outer rotating drum 2 and the inner rotating drum 4 rotate synchronously, and the centrifugal operation is realized. When the first driven pulley 61 and the second driven pulley 91 rotate at different speeds, whether the rotation speed of the first driven pulley 61 is ahead of or lags behind the second driven pulley 91 determines whether the inner rotating drum 4 is opened or closed.

[0049] The working process of the filter bag everted discharge structure is as follows:

[0050] When the first driven pulley 61 and the second driven pulley 91 rotate at different speeds, the inner rotating drum 4 moves axially to be opened, one end of the filter bag 5 fixed on the fixed plate 41 moves under the drive of the fixed plate 41, and the end of the filter bag 5 connected with the second end of the outer rotating drum 2 is stationary, until the filter bag 5 is completely everted and opened. At this time, the inner surface of the filter bag 5 changes from the inside to the outside, and the filter cake layer on the inner surface of the filter bag 5 is completely thrown out under the action of the centrifugal force, and the purpose of discharging is achieved. After discharging, the rotation speed of the first driven pulley 61 changes, the inner rotating drum 4 moves to the containing cavity, and the end sealing plate 42 blocks the outer rotating drum 2.

[0051] The embodiment also provides a centrifugal machine, which comprises a mounting shell and the filter bag everted discharge structure as above, the filter bag everted discharge structure is arranged in the mounting shell, and automatic discharge of filter cake can be realized, so that damage to the filter cake is avoided, and the performance of the filter cake material is ensured.

[0052] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, other different forms of changes or changes can be made on the basis of the above description. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A filter bag everted discharge structure, characterized by, The utility model relates to a filter bag machine, including: Hollow spindle (1); The first end of outer drum (2) is fixed coaxially in the first end of hollow spindle (1), and outer drum (2) has accommodating cavity; Push rod (3) is slid through in hollow spindle (1), and push rod (3) is rotationally connected with hollow spindle (1), and both ends of push rod (3) are protruding relative to hollow spindle (1); Inner drum (4) is located in accommodating cavity, and the first end of inner drum (4) is fixed coaxially with push rod (3) close to the first end of outer drum (2), and the second end of inner drum (4) blocks the opening of accommodating cavity; Filter bag (5) one end is connected with the second end of outer drum (2), and the other end of filter bag (5) is connected with the first end of inner drum (4); First drive structure is transmission connected with push rod (3), and first drive structure can drive push rod (3) moves along the axial direction of hollow spindle (1), so that the first end of inner drum (4) is protruding relative to accommodating cavity, so that the inner surface of filter bag (5) is everted.

2. The bag-out inversion structure of claim 1, wherein, The first drive structure includes first drive assembly (6), lead screw (8) and transmission nut assembly (7), the transmission nut assembly (7) is fixed coaxially in the second end of push rod (3), the lead screw (8) is screwed with the transmission nut assembly (7), the first drive assembly (6) is transmission connected with the lead screw (8), and the first drive assembly (6) can drive the lead screw (8) rotates, so that the transmission nut assembly (7) drives push rod (3) moves relative to hollow spindle (1).

3. The bag-out inversion structure of claim 2, wherein, The transmission nut assembly (7) includes main nut (71), the main nut (71) is connected with the second end of push rod (3), and the main nut (71) is screwed with the lead screw (8).

4. The bag-out inversion discharge structure of claim 3, wherein, The transmission nut assembly (7) further includes auxiliary nut (72), the auxiliary nut (72) is screwed with the lead screw (8), the main nut (71) is connected with the auxiliary nut (72) by connecting pin, and elastic member (73) is arranged between the main nut (71) and the auxiliary nut (72).

5. The bag-out inversion discharge structure of claim 1, wherein, The push rod (3) and the hollow spindle (1) are provided with a guide assembly (11), the guide assembly (11) can make the push rod (3) rotate with the hollow spindle (1), and can make the push rod (3) move along the axial direction of the hollow spindle (1).

6. The bag-out inversion discharge structure of claim 5, wherein, The guide groove is opened on the hollow spindle (1) along the axial direction of the hollow spindle (1), the guide assembly (11) includes guide flat key (111) and mounting ring (112), the guide flat key (111) is fixedly arranged on the push rod (3), and the guide flat key (111) is located in the guide groove, the mounting ring (112) is sleeved on the push rod (3), and is connected with the guide flat key (111).

7. The bag-out inversion discharge structure of claim 1, wherein, The inner rotating drum (4) comprises a fixed plate (41) and an end sealing plate (42), the fixed plate (41) and the end sealing plate (42) are arranged in parallel and spaced apart along the axial direction of the hollow main shaft (1), the fixed plate (41) is connected with the end sealing plate (42) through a connecting rod (43), the fixed plate (41) is connected with the first end of the push rod (3), and the end sealing plate (42) is used for sealing the opening of the containing cavity.

8. The bag-out inversion discharge structure of claim 7, wherein, A filter cloth pressing ring (411) is arranged on the fixed plate (41), and the other end of the filter bag (5) is clamped between the fixed plate (41) and the filter cloth pressing ring (411).

9. The bag-out inversion discharge structure of claim 1, wherein, Further comprising a second driving assembly (9), the second driving assembly (9) is in transmission connection with the hollow main shaft (1), and the second driving assembly (9) is used for driving the hollow main shaft (1) to rotate around the axis thereof.

10. A centrifuge, characterized by The filter bag everted unloading structure as claimed in any one of claims 1-9 is arranged in the mounting cabinet.

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