Screw protection device and plate-and-frame filter press

Abstract

A screw protection device is used for a plate-and-frame filter press and comprises a corrugated pipe, one end of the corrugated pipe is connected with a plate frame of the plate-and-frame filter press, the other end of the corrugated pipe is connected with a rotating device, and a screw of the plate-and-frame filter press is sealed in the corrugated pipe. And when the rotating device controls the screw rod to move forwards or backwards towards the plate frame, the corrugated pipe is compressed or stretched according to the movement of the screw rod. The screw rod is sealed in the corrugated pipe through the screw rod protection device, the problem that the screw rod is exposed in air and is not easy to clean is solved, and pollution of lubricating oil on the surface of the screw rod to the environment in a clean workshop is also avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of biological pharmaceutical process technology, specifically relates to a screw protection device and plate and frame filter press. BACKGROUND

[0002] The plate and frame filter press is a commonly used filtering equipment, and is mainly used for solid-liquid separation and dehydration in the biological pharmaceutical industry. In the production process of biological pharmaceuticals, the plate and frame filter press plays an important role, and can effectively separate solid and liquid in the suspension, so that solid and liquid two-phase materials are obtained.

[0003] In recent years, with the improvement of the biological pharmaceutical industry, higher requirements for the safety, environmental protection and energy saving of the equipment are put forward, and the equipment is required to meet the GMP requirements, and the outer surface of the equipment in the clean factory is easy to clean and can resist conventional surface disinfectants, such as 75% ethanol and sporicidal agent.

[0004] As shown in Figure 1 The existing manual plate and frame filter press includes a plate and frame, a screw, a hydraulic cylinder and a handle. In the running process, the handle is manually rotated to drive the screw to press the plate and frame tightly, so that the handle is difficult to rotate. Then, the hydraulic cylinder gives the screw a hydraulic driving thrust to press the plate and frame again to realize the sealing of the inside of the plate and frame.

[0005] The existing technology has the following problems:

[0006] (1) The surface of the screw is provided with threads. Since the screw is exposed, the surface is not easy to clean and disinfect.

[0007] (2) In order to facilitate the movement of the screw, lubricating oil is used on the surface of the screw. The lubricating oil can pollute the environment in the clean factory, and cannot meet the GMP requirements. SUMMARY

[0008] In order to overcome the defects of the prior art, one object of the utility model is to provide a screw protection device, and another object of the utility model is to provide a plate and frame filter press. In order to achieve the above objects, the utility model adopts the following technical scheme:

[0009] One aspect of the utility model provides a screw protection device for a plate and frame filter press. The device includes a bellows, one end of the bellows is connected with a plate and frame of the plate and frame filter press, the other end is connected with a rotating device, and a screw of the plate and frame filter press is sealed in the bellows. When the rotating device controls the screw to move forward or backward, the bellows is compressed or stretched according to the movement of the screw.

[0010] Optionally, the bellows is made of corrosion-resistant plastic.

[0011] Optionally, the wave crest and wave trough of the bellows are provided with a rounded corner.

[0012] Optionally, one end of the bellows is connected with one end of the oil cylinder through a first connecting piece, the other end of the oil cylinder is connected with the screw rod, and the other end of the oil cylinder is connected with the plate frame.

[0013] Optionally, the other end of the bellows is connected with the rotating device through a second connecting piece, and the second connecting piece is used for converting the rotating force of the rotating device into a pushing force.

[0014] Optionally, the two ends of the bellows are provided with an integrated flange piece.

[0015] Optionally, the first connecting piece is a flange.

[0016] Optionally, the second connecting piece is a rotary hinge, one side of the rotary hinge is connected with the bellows, and the other side of the rotary hinge is fixed to the rotating device.

[0017] Optionally, the plate frame filter press comprises a support, the screw rod is movably sleeved with the support, the bellows comprises a first bellows and a second bellows, one end of the first bellows is connected with the plate frame, the other end of the first bellows is fixed to the support, one end of the second bellows is fixed to the support, the other end of the second bellows is connected with the rotating device, the screw rod is sealed in the first bellows and the second bellows, and when the rotating device controls the screw rod to move forward or backward to the plate frame, the first bellows and the second bellows are compressed or stretched along with the movement of the screw rod.

[0018] Another aspect of the utility model provides a plate frame filter press, including plate frame, screw rod, rotating device, oil cylinder and like preceding screw rod protection device, the screw rod is sealed in the screw rod protection device.

[0019] The screw rod protection device of the utility model seals the screw rod in the screw thread pipe through the bellows, prevents the problem that the screw rod is exposed to the air and is not easy to clean, and also avoids that the lubricating oil on the surface of the screw rod pollutes the environment in the clean workshop. The bellows of the utility model adopts a corrosion-resistant plastic material, is environment-friendly and sanitary, can resist the cleaning agent and disinfectant in the pharmaceutical clean workshop, has a large amount of expansion and contraction, can meet the requirement of the longitudinal space required by the reciprocating motion of the screw rod when the plate frame is opened and closed, the bellows of the utility model adopts detachable connection, and the structure is simple and the operation is convenient. The plate frame filter press of the utility model is low in cost, convenient to maintain, can meet the requirement of the clean workshop, and has high practical value. BRIEF DESCRIPTION OF DRAWINGS

[0020] The reader will understand the various aspects of the present application more clearly after reading the detailed description of the application in conjunction with the accompanying drawings. Among them,

[0021] Figure 1 is a structural diagram of an existing plate-and-frame filter press;

[0022] Figure 2 is a structural diagram of a plate-and-frame filter press of an embodiment of the present application;

[0023] Figure 3 is a structural diagram of a screw protection device of an embodiment of the present application -1;

[0024] Figure 4 is a structural diagram of a screw protection device of an embodiment of the present application -2;

[0025] Figure 5 is a structural diagram of a screw protection device of an embodiment of the present application -3;

[0026] Figure 6 is a structural diagram of a screw protection device of an embodiment of the present application -4;

[0027] Explanation of reference signs:

[0028] 1: screw protection device; 2: screw; 3: plate frame; 4: oil cylinder; 5: rotating device; 6: support;

[0029] 11: corrugated pipe; 12: first connecting piece; 13: second connecting piece;

[0030] 111: first corrugated pipe; 112: second corrugated pipe; 113: one-piece flange piece. DETAILED DESCRIPTION

[0031] In order to make the technical content disclosed in the present application more detailed and complete, reference can be made to the accompanying drawings and the following specific embodiments of the present application. However, those skilled in the art should understand that the embodiments provided below are not intended to limit the scope of the present application. In addition, the drawings are only used for illustrative purposes and are not drawn according to their original size.

[0032] In the specification, "connection" includes both direct connection and indirect connection. In the specification, "several" and "multiple" both refer to two or more. In the specification and claims and the above drawings, the terms "first", "second", "third"

[0033] "fourth", etc., if any, are used to distinguish among similar objects, and are not necessarily intended to describe a particular sequential or chronological order. It is to be understood that data used in this description is for the purpose of explanation only and that the embodiments of the present application described herein can be implemented with other data in different embodiments. Further, the terms "comprise" and "include", and variations thereof, do not have a limiting meaning and assist in disclosure of one embodiment of the application without excluding other embodiments. Further, the terms "comprise", "comprising", "contain", "containing", "include", "including" and "includes" are used throughout, specifying certain elements present within certain embodiments of the application, but not precluding the presence of other elements not fully elaborated.

[0034] The technical solutions of the present application will be described in detail below. The following embodiments can be combined with each other, and the same or similar concepts or processes can not be described again in some embodiments.

[0035] Embodiment one:

[0036] The present embodiment provides a screw protection device 1 for a plate-and-frame filter press, the plate-and-frame filter press comprising a screw 2, a plate-and-frame 3, an oil cylinder 4 and a rotating device 5. The screw protection device 1 is used to prevent the screw 2 from being exposed to the air. Please refer to Figures 2-6 , the screw protection device 1 comprises a corrugated pipe 11, specifically, the corrugated pipe 11 is made of corrosion-resistant plastic, such as PTFE, which is stable in performance and safe in environment, and can resist pharmaceutical cleaning agents and disinfectants. Specifically, the peaks and valleys of the corrugated pipe 11 are provided with rounded corners, so that the surface of the corrugated pipe 11 is smooth and easy to clean, to meet the requirements of clean room GMP.

[0037] In the present embodiment, the two ends of the corrugated pipe 11 are provided with an integral flange sheet 113, which facilitates the installation and removal of the corrugated pipe 11, and maintenance is also more convenient. One end of the corrugated pipe 11 is connected to the plate-and-frame 3, specifically, one end of the corrugated pipe 11 is connected to one end of the oil cylinder 4 through a first connecting piece 12, and the other end of the oil cylinder 4 is connected to the screw 2, and the other end of the oil cylinder 4 is connected to the plate-and-frame 3, specifically, the first connecting piece 12 is a flange, specifically, in the prior art, the oil cylinder 4 and the plate-and-frame 3 are connected by a flange, in the present embodiment, the corrugated pipe 11 is connected to the flange through the integral flange sheet 113, thereby connecting the oil cylinder 4, the screw 2 and the corrugated pipe 11 together.

[0038] In the embodiment, the other end of the bellows 11 is connected with the rotating device 5, specifically, the other end of the bellows 11 is connected with the rotating device 5 through the second connecting piece 13, specifically, the second connecting piece 13 is used for converting the rotating force of the rotating device 5 into pushing force, specifically, the second connecting piece 13 is a rotary hinge, one side of the rotary hinge is connected with the bellows 11, and the other side is fixed to the rotating device 5, specifically, the large round plate on one side of the rotary hinge is connected with the integral flange piece 113 of the bellows 11 through bolts, and the small round plate on the other side of the rotary hinge is welded with the rotating device 5. In the embodiment, the rotating device 5 is a rotating handle, the screw rod 2 is pushed forward or backward by rotating the rotating handle clockwise or counterclockwise, since one end of the bellows 11 is fixed to the rotating device 5, when the rotating handle is rotated, the bellows 11 will be damaged when being compressed or stretched and rotating clockwise or counterclockwise with the rotating handle, the embodiment sets the rotary hinge, so that when the rotating device 5 rotates, only axial pushing force is generated on the bellows 11, and no rotating force is generated, so that the bellows 11 is prevented from being damaged due to frequent rotation, and the service life of the bellows 11 is prolonged.

[0039] In the embodiment, the screw rod 2 is sealed in the bellows 11, when the rotating device 5 controls the screw rod 2 to move forward or backward to the plate frame 3, the bellows 11 is compressed or stretched according to the movement of the screw rod 2. Specifically, since the two ends of the bellows 11 are connected with the oil cylinder 4 and the rotating device 5 respectively, a sealed space is formed, and the screw rod 2 is arranged in the sealed space, so that the screw rod 2 is prevented from being exposed to air.

[0040] In the embodiment, the plate-and-frame filter press further comprises a support 6 connected with the plate-and-frame 3 through a fixing rod, the relative position of the support 6 and the plate-and-frame 3 is fixed, the screw rod 2 is movably sleeved with the support 6, specifically, the support 6 comprises a through hole, one end of the screw rod 2 passes through the through hole and is connected with the oil cylinder 4, and the other end is connected with the rotating device 5. The bellows 11 comprises a first bellows 111 and a second bellows 112, both sides of the first bellows 111 and the second bellows 112 are provided with an integral flange plate 113, specifically, the first bellows 111 is arranged on one side of the support 6, one end of the first bellows 111 is connected with the plate-and-frame 3, and the other end is fixed to the support 6, specifically, one end of the first bellows 111 is connected with the oil cylinder 4 through the integral flange plate 113, the oil cylinder 4 is connected with the plate-and-frame 3, and the other end is fixed to the support 6 through the integral flange plate 113; the second bellows 112 is arranged on the other side of the support 6, one end of the second bellows 112 is fixed to the support 6 through the integral flange 113, and the other end is connected with the rotating device 5 through the rotary hinge, specifically, the large round plate on one side of the rotary hinge is connected with the integral flange plate 113 of the second bellows 112 through a bolt, and the small round plate on the other side of the rotary hinge is welded with the rotating device 5. The screw rod 2 is sealed in the first bellows 111 and the second bellows 112, when the rotating device 5 controls the screw rod 2 to move forward or backward to the plate-and-frame 3, the first bellows 111 and the second bellows 112 are compressed or stretched with the movement of the screw rod 2, specifically, when the rotating device 5 controls the screw rod 2 to move forward to the plate-and-frame 3, the first bellows 111 is stretched, and the second bellows 112 is compressed; when the rotating device 5 controls the screw rod 2 to move backward, the first bellows 111 is compressed, and the second bellows 112 is stretched. The embodiment adopts the bellows to protect the screw rod 2, which has the advantages of simple structure, large stretching range, flexible operation and convenient maintenance.

[0041] Embodiment two:

[0042] The embodiment provides a plate-and-frame filter press, please refer to Figure 2 , the plate-and-frame filter press comprises a screw rod 2, a plate-and-frame 3, an oil cylinder 4, a rotating device 5, a support 6 and the screw rod protection device 1 in embodiment one, and the screw rod 2 is sealed in the screw rod protection device 1.

[0043] In the embodiment, the screw protection device 1 comprises a first bellows 111, a second bellows 112, a first connecting piece 12, and a second connecting piece 13. One end of the first bellows 111 is connected with the oil cylinder 4 through the first connecting piece 12, and the other end is fixed on the support 6. One end of the second bellows 112 is fixed on the support 6, and the other end is connected with the rotating device 5 through the second connecting piece 13. The first bellows 111, the second bellows 112, the oil cylinder 4, and the rotating device 5 form a sealed space for accommodating the screw 2, so as to prevent the screw 2 from being exposed to air.

[0044] In the embodiment, when the rotating device 5 controls the screw 2 to move forward and face the plate-and-frame 3, the first bellows 111 is stretched, and the second bellows 112 is compressed. When the rotating device 5 controls the screw 2 to move backward, the first bellows 111 is compressed, and the second bellows 112 is stretched.

[0045] Embodiment three:

[0046] The embodiment illustrates the installation and use process of the plate-and-frame filter press, so as to further illustrate the technical scheme adopted by the screw protection device. The installation and use steps of the plate-and-frame filter press are as follows:

[0047] (1) One end of the screw 2 is connected with the oil cylinder 4 through a flange.

[0048] (2) The first bellows 111 is sleeved with the screw 2, one end of which is connected with the oil cylinder 4 through the flange, and the other end is fixed on the support 6.

[0049] (3) The second bellows 112 is sleeved with the screw 2, one end of which is fixed on the support 6, and the other end is connected with the rotating device 5 through the rotary hinge.

[0050] (4) The rotating device 5 is rotated to control the screw 2 to move towards the plate-and-frame 3, so as to press the plate-and-frame 3. At this time, the first bellows 111 is stretched, and the second bellows 112 is compressed. After the plate-and-frame 3 is pressed, the oil cylinder 4 is started to seal the plate-and-frame 3, and the installation of the plate-and-frame 3 is completed.

[0051] (5) When the plate-and-frame filter press is completed, the plate-and-frame 3 needs to be disassembled. First, the pressure of the oil cylinder 4 is released to 0, and then the rotating device 5 is rotated to control the screw 2 to move backward, so as to loosen the plate-and-frame 3. At this time, the first bellows 111 is compressed, and the second bellows 112 is stretched.

[0052] The screw protection device of the utility model, through bellows seal the screw in the screw pipe, prevent because the screw exposes in the air, not easy to clean the problem, also avoided the lubricating oil on the surface of the screw to the environment in the clean workshop produces pollution. The bellows of the utility model adopts the corrosion -resistant plastic material, environmental protection, health, can resist the cleaning agent and the disinfectant in the pharmaceutical clean workshop;The bellows telescopic quantity is big, can satisfy the reciprocating motion required longitudinal space of the screw when the plate frame opens and closes;The bellows of the utility model adopts detachable connection, simple structure, convenient operation. The plate and frame filter press of the utility model, low cost, convenient maintenance, can satisfy the requirement of clean workshop, has higher practical value.

[0053] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not the limitation of the implementation mode of the utility model. For ordinary skilled person in the art, on the basis of the above description, other different forms of changes or variations can be made, the enumerated embodiments of the utility model cannot be exhausted for all implementation modes, and any obvious changes or variations derived from the technical scheme of the utility model still belong to the protection scope of the utility model. All the documents mentioned in the utility model are cited as reference in this application, just like a document is cited as reference individually.

Claims

1. A screw protection device for a plate-and-frame filter press, characterized in that The device comprises a bellows, one end of which is connected with a plate frame of the plate-and-frame filter press, and the other end is connected with a rotating device, a screw rod of the plate-and-frame filter press is sealed in the bellows, when the rotating device controls the screw rod to move forward or backward to the plate frame, the bellows is compressed or stretched according to the movement of the screw rod.

2. The screw protection device of claim 1, wherein, The bellows is made of corrosion-resistant plastic.

3. The screw protection device of claim 1, wherein, The crest and trough of the bellows are provided with rounded corners.

4. The screw protection device of claim 1, wherein, One end of the bellows is connected with one end of an oil cylinder through a first connecting piece, the other end of the oil cylinder is connected with the screw rod, and the other end of the oil cylinder is connected with the plate frame.

5. The screw protection device of claim 4, wherein, The other end of the bellows is connected with the rotating device through a second connecting piece, the second connecting piece is used to convert the rotating force of the rotating device into a pushing force.

6. The screw protection device of claim 5, wherein, Both ends of the bellows are provided with an integral flange piece.

7. The screw protection device of claim 6, wherein, The first connecting piece is a flange.

8. The screw protection device of claim 7, wherein, The second connecting piece is a rotary hinge, one side of the rotary hinge is connected with the bellows, and the other side is fixed to the rotating device.

9. The screw protection device of claim 1, wherein, The plate-and-frame filter press comprises a support, the screw rod is movably sleeved with the support, the bellows comprises a first bellows and a second bellows, one end of the first bellows is connected with the plate frame, and the other end is fixed to the support, one end of the second bellows is fixed to the support, and the other end is connected with the rotating device, the screw rod is sealed in the first bellows and the second bellows, when the rotating device controls the screw rod to move forward or backward to the plate frame, the first bellows and the second bellows are compressed or stretched according to the movement of the screw rod.

10. A plate-and-frame filter press, characterized in that The device comprises a plate frame, a screw rod, a rotating device, an oil cylinder and the screw rod protection device as claimed in any one of claims 1 to 9, and the screw rod is sealed in the screw rod protection device.

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