Plate and frame driving mechanism and plate and frame filter press device

Abstract

The present invention discloses a plate-frame driving mechanism and a plate-frame filter press device. A plurality of housing piston spaces are provided on a pressure plate. A piston rod is fixed in the housing piston space. A through hole is provided in the piston rod, and the through hole is connected to a pressure medium pipeline. A housing is sleeved on the outer periphery of the piston rod. The inner cavity of the housing is connected to the through hole. The housing is limited by a gland at the mouth of the housing piston space. When working, the top surface of the housing contacts the bottom surface of the push plate and acts on the push plate. The piston rod is connected to the housing piston space of the pressure plate. When the pressure medium enters the housing, the housing can be pushed to move. The movement of the housing can push the push plate away from or close to the pressure plate. When in use, the piston rod is sealed inside the housing, not exposed to the outside, and will not be corroded, thereby extending the service life of the oil cylinder, reducing the maintenance frequency, and saving maintenance costs.

Description

Technical Field

[0001] The invention relates to filter pressing equipment, in particular to a plate-frame driving mechanism and a plate-frame filter pressing device. Background Art

[0002] The plate and frame filter press is the first machine used in chemical dehydration. It has the advantages of large filtering driving force, high solid content of filter cake, clear filtrate, high solid recovery rate, and low consumption of conditioning drugs. The plate and frame filter press includes a push plate and a pressure plate, and the push plate and the pressure plate need to be opened and closed. The traditional plate and frame filter press is to install the driving cylinder or the oil cylinder on the pressure plate, and then connect the piston rod of the driving cylinder or the oil cylinder with the pushing plate, and the driving cylinder or the oil cylinder drives the piston rod to extend or retract, so as to realize the opening or closing of the pushing plate and the pressure plate. However, some of the processed materials are corrosive and will corrode the piston rod. Since the piston rod and the cylinder body of the driving cylinder or the oil cylinder need to be directly provided with a sealing component, once the piston rod is corroded, it is easy to destroy the sealing structure, causing the driving cylinder or the oil cylinder to leak air or oil, affecting the normal operation of the equipment, increasing the maintenance frequency, and high maintenance cost. Summary of the invention

[0003] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a device to solve one or more problems in the prior art.

[0004] To achieve the above object, the technical solution of the present invention is as follows:

[0005] A plate-frame driving mechanism, wherein a plurality of shell-piston spaces are provided on a pressure-bearing plate, and a pressure medium pipeline is provided in the pressure-bearing plate; a piston rod is fixed in the shell-piston space, and a through hole is provided in the piston rod, and the through hole is connected to the pressure medium pipeline; a shell is sleeved on the outer periphery of the piston rod, and the inner cavity of the shell is connected to the through hole, and the shell can slide up and down along the piston rod; the shell is limited by a pressure cover at the mouth of the shell-piston space.

[0006] As a further improvement of the above technical solution:

[0007] A boss is arranged in the piston space of the housing of the pressure plate, and the piston rod is connected to the boss; a pressure medium channel is opened in the boss, and the pressure medium channel connects the through hole of the piston rod and the pressure medium pipeline; the pressure medium channel is orthogonal to the pressure medium pipeline, and the pressure medium pipeline is connected to the bottom of the pressure medium channel.

[0008] The boss is provided with an external thread, the through hole of the piston rod is provided with an internal thread, and the piston rod is threadably connected to the boss through the internal thread matching the external thread.

[0009] An internal thread is provided in the pressure medium channel of the boss, and a hollow bolt is used in the through hole of the piston rod and the pressure medium channel of the boss to achieve fixed connection between the piston rod and the boss, and a central channel of the hollow bolt is connected to the pressure medium pipeline.

[0010] The upper end of the shell piston space is connected to the gland, the shell is inserted into the gland, an inner step is arranged inside the gland, an outer step is arranged outside the shell, and the outer step cooperates with the inner step to achieve positioning; a waterproof sealing groove and a guide groove are also opened on the inner side of the gland, and a waterproof sealing ring and a guide ring are respectively installed in the waterproof sealing groove and the guide groove; or a combination ring that is both waterproof and oil-proof is arranged in the waterproof sealing groove.

[0011] The gland is fixed on the pressure plate by threaded engagement or by fasteners, and a sealant or a sealing ring is provided between the gland and the pressure plate.

[0012] A guide sleeve is arranged between the shell and the piston rod, and the piston rod is inserted into the guide hole of the guide sleeve; a sealing groove is opened on the inner side and / or the outer side of the guide sleeve, and a sealing ring is installed in the sealing groove; an internal thread is processed inside the shell, and an external thread is processed outside the guide sleeve, and the guide sleeve is threadedly connected to the shell through the internal thread and the external thread; or the guide sleeve is integrally connected to the shell.

[0013] An outer ring groove is provided on the outer periphery of the lower part of the shell, and an outer support ring is arranged in the outer ring groove; a first inner ring groove, a second inner ring groove and a third inner ring groove are provided on the inner periphery of the shell; an inner support ring is arranged in the first inner ring groove, a step seal is arranged in the second inner ring groove, and a Y-shaped ring is arranged in the third inner ring groove.

[0014] A piston rod sealing groove is provided in the through hole of the piston rod, and a sealing ring is arranged in the piston rod sealing groove; the upper end of the through hole of the piston rod is processed into a polygon; and the outer side of the shell is coated with corrosion-resistant material.

[0015] A plate-frame filter press device adopts the plate-frame driving mechanism and also includes a push plate. When working, the top surface of the shell contacts the bottom surface of the push plate and acts on the push plate.

[0016] As a further improvement of the above technical solution:

[0017] A plurality of first guide holes are provided on the push plate, and a plurality of second guide holes are correspondingly provided on the pressure plate. A fixed sleeve is connected to the second guide hole, a copper sleeve is inserted in the fixed sleeve, and the copper sleeve is pressed on the step surface of the fixed sleeve by a retaining spring. A guide rod is inserted in the copper sleeve, and the guide rod is fixedly connected to the push plate by a screw. A sealing ring is provided between the guide rod and the fixed sleeve for sealing.

[0018] The push plate is provided with a plurality of first limit blocks; the pressure plate is provided with a plurality of second limit blocks, and the second limit blocks and the first limit blocks of the push plate are located at different side edges.

[0019] The second limiting block is provided with a longitudinal limiting portion and a transverse limiting portion. The longitudinal limiting portion limits the longitudinal displacement of the push plate, and the transverse limiting portion limits the transverse displacement of the push plate.

[0020] A convex piece is arranged on the outer edge of the pressure plate, and a hook plate is correspondingly arranged on the push plate, and the hook plate cooperates with the convex piece to form a limiting structure.

[0021] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0022] 1) Connect the piston rod to the piston space of the housing of the pressure plate. When the pressure medium enters the housing, it can push the housing to move. The movement of the housing can push the push plate away from or close to the pressure plate. When in use, the piston rod is sealed inside the housing and is not exposed to the outside and will not be corroded. The outer surface of the housing is exposed to the outside. Even if the outer surface of the housing is partially corroded, it will not affect the work of the piston rod sealed inside, and will not affect the normal use of the driving components, thereby extending the service life of the oil cylinder, reducing the maintenance frequency, and saving maintenance costs.

[0023] 2) A gland is provided to limit the housing and guide the housing to ensure stable movement of the housing;

[0024] 3) A guide sleeve is arranged between the piston rod and the housing, which not only plays a guiding role, but also plays a sealing role to prevent the pressure medium from leaking out.

[0025] 4) The piston rod is fixedly connected to the raised boss in the piston space of the pressure plate housing, which can make the piston rod obtain a higher connection height within the limited thickness of the pressure plate, with better connection strength and more reliable connection. The pressure medium channel of the boss is arranged orthogonally to the pressure medium pipeline, and the pressure medium pipeline is connected to the bottom of the pressure medium channel, so that the pressure medium flows more smoothly and is not easily blocked.

[0026] 5) The piston rod and the boss are connected and fixed by hollow bolts, which can reduce the processing difficulty of the pressure plate and reduce the processing cost.

[0027] 6) An outer support ring is arranged on the lower periphery of the shell to improve the wear resistance and prevent the shell from directly rubbing against the gland and causing hair pulling.

[0028] 7) The guide rod can adjust the synchronization of each piston and prevent the push plate and the pressure plate from disengaging.

[0029] 8) The first limit block and the second limit block limit the push plate and the pressure plate to prevent the push plate from directly hitting the pressure plate. The second limit block has a longitudinal limit part and a transverse limit part. The longitudinal limit part is used to limit the longitudinal displacement of the push plate to prevent the push plate from directly hitting the pressure plate, and the transverse limit part is used to limit the transverse displacement of the push plate to prevent the push plate from swinging.

[0030] 9) The hook plate and the protruding piece cooperate to form a limiting structure, which further limits the push plate and the pressure plate to prevent the push plate and the pressure plate from being disengaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A cross-sectional view of a plate frame driving mechanism according to an embodiment of the present invention is shown.

[0032] Figure 2 A cross-sectional view of a pressure plate of a plate frame driving mechanism according to an embodiment of the present invention is shown.

[0033] Figure 3 A cross-sectional view of a piston rod of a plate frame driving mechanism according to an embodiment of the present invention is shown.

[0034] Figure 4 A top view of a piston rod of a plate frame driving mechanism according to an embodiment of the present invention is shown.

[0035] Figure 5 A top view of another piston rod of the plate frame driving mechanism according to an embodiment of the present invention is shown.

[0036] Figure 6 A cross-sectional view of a plate frame driving mechanism housing and a guide sleeve according to an embodiment of the present invention is shown.

[0037] Figure 7 A cross-sectional view of a plate frame driving mechanism cover according to an embodiment of the present invention is shown.

[0038] Figure 8 A cross-sectional view showing a plate frame driving mechanism according to another embodiment of the present invention.

[0039] Fig. 9 A cross-sectional view of a plate frame driving mechanism housing and a guide sleeve according to another embodiment of the present invention is shown.

[0040] Fig.10 A cross-sectional view of another embodiment of the connection between the pressure plate and the piston rod of the present invention is shown.

[0041] Fig.11 A cross-sectional view of another embodiment of a housing of the present invention is shown.

[0042] Fig.12 A cross-sectional view of another embodiment of the gland of the present invention is shown.

[0043] Fig.13 A perspective view of a push plate according to the present invention is shown.

[0044] Fig.14 A perspective view of a pressure plate according to the present invention is shown.

[0045] Fig.15 A cross-sectional view of a pressure plate according to the present invention is shown.

[0046] Fig.16 A partial cross-sectional view showing a longitudinal section of a pressure plate according to the present invention.

[0047] Fig.17 A cross-sectional view of the push plate and the pressure bearing plate of the present invention at the guide structure portion is shown.

[0048] Fig.18 A cross-sectional view of the push plate and the pressure bearing plate at the hook plate portion of the present invention is shown.

[0049] Markings in the accompanying drawings:

[0050] 1. Push plate; 11. First guide hole; 12. First limit block; 2. Pressure plate; 21. Shell piston space; 22. Pressure medium channel; 23. Boss; 24. Pressure medium pipeline; 241. Medium inlet and outlet; 25. Second guide hole; 26. Second limit block; 261. Longitudinal limit part; 262. Transverse limit part; 27. Lug; 28. Drain hole; 3. Piston rod; 31. Through hole; 311. Piston rod sealing groove; 4. Shell; 41. Outer ring groove; 42. First inner ring groove; 43. Second inner ring groove; 44. Third inner ring groove; 5. Gland; 51. Waterproof sealing groove; 52. Guide groove; 6. Guide sleeve; 61. Guide hole; 62. Inner sealing groove; 63. Outer sealing groove; 7. Hollow bolt; 71. Central channel; 8. Outer support ring; 9. Inner support ring; 10. Fixed sleeve; 20. Copper sleeve; 30. Guide rod; 40. Screw rod; 50. Circlip; 60. Hook plate. DETAILED DESCRIPTION

[0051] The specific implementation of the present invention is described below in conjunction with the accompanying drawings.

[0052] In order to make the purpose, technical scheme and advantages of the present invention clearer, the device proposed by the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will be clearer. It should be noted that the accompanying drawings adopt a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structure, proportion, size, etc. illustrated by the accompanying drawings of this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect that the present invention can produce and the purpose that can be achieved, should still fall within the scope of the technical content disclosed by the present invention.

[0053] Embodiment 1:

[0054] like Figures 1 to 7 As shown, the plate frame driving mechanism of this embodiment includes a push plate 1 and a pressure plate 2. A plurality of housing piston spaces 21 for installing the driving mechanism are provided around the pressure plate 2. The upper end of the housing piston space 21 is connected to a gland 5. The driving mechanism includes a piston rod 3, a guide sleeve 6 and a housing 4. An internal thread is processed inside the housing 4, and an external thread is processed outside the matching guide sleeve 6. The guide sleeve 6 is threadedly connected in the housing 4 through the internal thread matching the external thread. The piston rod 3 passes through a guide hole 61 provided in the guide sleeve 6. An internal sealing groove 62 and an external sealing groove 63 are provided inside and outside the guide sleeve 6, respectively. A second sealing ring for sealing the gap between the piston rod 3 and the guide sleeve 6 is installed in the internal sealing groove 62, and a third sealing ring for sealing the gap between the guide sleeve 6 and the housing 4 is installed in the external sealing groove 63. A boss 23 for mounting the piston rod 3 is provided in the housing piston space 21. The boss 23 is provided with an external thread. A through hole 31 for connection is provided in the matching piston rod 3, and an internal thread is provided at one end. The piston rod 3 is threadedly connected to the boss 23 through the internal thread matching the external thread. A piston rod sealing groove 311 is provided in the through hole 31 of the piston rod 3 at the position below the internal thread. A first sealing ring for sealing the gap between the piston rod 3 and the boss 23 is provided in the piston rod sealing groove 311. A pressure medium channel 22 connected with the through hole 31 of the piston rod 3 is provided in the boss 23 of the pressure plate 2. The housing 4 is inserted in the gland 5. A waterproof sealing groove 51 and a guide groove 52 are also provided in the inner side of the gland 5. A waterproof sealing ring and a guide ring are respectively installed in the waterproof sealing groove 51 and the guide groove 52, which play a waterproof and guiding role. An inner step for positioning the housing 4 is provided in the gland 5, and an outer step is provided on the outer side of the matching housing 4. The housing 4 acts on the pressure plate 2.

[0055] The upper end of the through hole 31 of the piston rod 3 is processed into a multi-shaped hole (such as a hexagon or a quadrilateral), and a polygonal tool can be inserted into the polygonal hole to facilitate tightening the piston rod 3 onto the boss 23 in the piston space 21 of the housing.

[0056] Embodiment 2:

[0057] like Figure 8 , Fig. 9 As shown, the housing 4 and the guide sleeve 6 can also be connected as one piece, which can further reduce the installation space, and there is no need to process the outer sealing groove 63, and there is no need to use a third sealing ring, which further reduces the production cost.

[0058] The outer side of the shell 4 may be coated with a corrosion-resistant material to improve the corrosion resistance of the shell 4 .

[0059] The pressure can be hydraulic oil or high-pressure gas.

[0060] When the plate-frame driving mechanism of the present embodiment is installed, the piston rod 3 is first threadedly connected to the boss 23 of the housing piston space 21 of the pressure plate 2, and then the guide sleeve 6 is threadedly connected to the housing 4. After the connection is completed, the guide sleeve 6 and the housing 4 are sleeved and connected to the outside of the piston rod 3, and finally the pressure cover 5 is connected to the housing piston space 21, the housing 4 extends through the pressure cover 5 to the outside of the pressure plate 2, and the housing 4 is located at one end outside the pressure plate 2 and fixedly connected to the push plate 1, and the installation is completed. After the installation is completed, the driving mechanism can drive the push plate 1 to move; when the push plate 1 needs to be opened, the pressure is introduced from the pressure medium pipeline 24, and is introduced into the housing 4 through the pressure medium channel 22 and the through hole 31 of the piston rod 3, which can drive the housing 4 to move outward and push the push plate 1 to open upward; when the push plate 1 needs to be closed for filter pressing, the external force pushes the push plate 1 close to the pressure plate 2 for filter pressing operation, and at the same time the housing 4 moves into the pressure plate 2, and the pressure flows back through the through hole 31 of the piston rod 3, the pressure medium channel 22 and the pressure medium pipeline 24.

[0061] Embodiment three:

[0062] like Fig.10 As shown, in another embodiment, the boss 23 of the pressure plate 2 may not have an external thread, but an internal thread may be provided in the pressure medium channel 22. After the piston rod 3 is inserted into the boss 23, the hollow bolt 7 is tightened into the pressure medium channel 22 to achieve a fixed connection between the piston rod 3 and the boss 23; the hollow bolt 7 has a central channel 71, and the central channel 71 is connected to the pressure medium pipeline 24. The piston rod 3 and the boss 23 are connected and fixed by the hollow bolt 7, which can reduce the difficulty of the processing technology of the pressure plate 2 and reduce the processing cost.

[0063] like Fig.11 As shown, in another embodiment, the guide sleeve 6 may not be provided in the housing 4, and the housing 4 is directly sleeved on the outside of the piston rod 3. The lower outer periphery of the housing 4 may also be provided with a circle of outer ring grooves 41, and an outer support ring 8 is provided in the outer ring groove 41, which can improve the wear resistance and prevent the housing 4 from directly rubbing against the gland 5 to cause the hair pulling phenomenon. The inner peripheral surface of the housing 4 is provided with a first inner ring groove 42, a second inner ring groove 43, and a third inner ring groove 44 from top to bottom; an inner support ring 9 is provided in the first inner ring groove 42, which can improve the wear resistance and prevent the housing 4 from directly rubbing against the piston rod 3 to cause the hair pulling phenomenon; a step seal is provided in the second inner ring groove 43, and a Y-shaped ring is provided in the third inner ring groove 44, and the step seal and the Y-shaped ring seal the matching gap between the housing 4 and the piston rod 3.

[0064] like Fig.12As shown, a waterproof sealing groove 51 and a guide groove 52 are provided on the inner circumference of the upper part of the gland 5. A waterproof sealing ring and a guide ring are installed in the waterproof sealing groove 51 and the guide groove 52 respectively, which play a waterproof and guiding role. The waterproof sealing ring and the guide ring can also play a double sealing role. Even if the first seal leaks, the second seal can prevent oil leakage, and the sealing effect is more reliable. A combination ring can also be set in the waterproof sealing groove 51. The combination ring can be both waterproof and oil-proof, and a reliable sealing effect can also be obtained.

[0065] like Fig.13 As shown, a plurality of first guide holes 11 are provided on the push plate 1 ; a plurality of first limit blocks 12 are also provided on the frames on opposite sides of the push plate 1 , and the first limit blocks 12 protrude from the bottom surface of the push plate 1 .

[0066] like Figures 14 to 16 As shown, the pressure plate 2 is provided with a pressure medium pipeline 24, and the pressure medium pipeline 24 has a medium inlet and outlet 241. The pressure medium channels 22 in all the shell piston spaces 21 provided on the pressure plate 2 are connected to the pressure medium pipeline 24 provided on the pressure plate 2, and the pressure medium enters and exits through a medium inlet and outlet 241. Each pressure medium channel 22 is orthogonal to the pressure medium pipeline 24, and the pressure medium pipeline 24 is connected to the bottom of the pressure medium channel 22, so that the pressure medium flows more smoothly and is less likely to be blocked. A plurality of second guide holes 25 are provided on the pressure plate 2, and the second guide holes 25 correspond to the first guide holes 11 of the push plate 1; as shown Fig.17 As shown, a fixing sleeve 10 is fixedly connected in the second guide hole 25 by threaded cooperation, a copper sleeve 20 is inserted in the fixing sleeve 10, and the copper sleeve 20 is pressed on the step surface of the fixing sleeve 10 by a retaining spring 50, a guide rod 30 is inserted in the copper sleeve 20, and the guide rod 30 is fixedly connected to the push plate 1 by a screw 40, the push plate 1 can drive the guide rod 30 to slide up and down in the copper sleeve 20, the guide rod 30 can play a role in adjusting the synchronization of each piston, and can also prevent the push plate 1 from being disengaged from the pressure plate 2; a sealing ring is arranged between the guide rod 30 and the fixing sleeve 10 for sealing. The top surface of the pressure plate 2 is provided with a plurality of second limit blocks 26. The second limit blocks 26 and the first limit blocks 12 of the push plate 1 are located at different side edges. The first limit blocks 12 and the second limit blocks 26 limit the push plate 1 and the pressure plate 2 to prevent the push plate 1 from directly hitting the pressure plate 2. Some of the second limit blocks 26 of the pressure plate 2 have a longitudinal limit portion 261 and a transverse limit portion 262. The longitudinal limit portion 261 is used to limit the longitudinal displacement of the push plate 1 to prevent the push plate 1 from directly hitting the pressure plate 2. The transverse limit portion 262 is used to limit the transverse displacement of the push plate 1 to prevent the push plate 1 from swinging. The outer edges of the opposite sides of the pressure plate 2 are protruding outward with protrusions 27; such as Fig.18As shown, an L-shaped hook plate 60 is fixedly provided on the push plate 1 at a position corresponding to the protruding piece 27 by a fastener, and the hook plate 60 cooperates with the protruding piece 27 to form a limiting structure, which further limits the push plate 1 and the pressure plate 2 to prevent the push plate 1 from being disengaged from the pressure plate 2. A plurality of drain holes 28 are also provided on the pressure plate 2.

[0067] In other embodiments, the gland 5 may also be fixed to the pressure plate 2 by fasteners. A sealant or a sealing ring is provided between the gland 5 and the pressure plate 2 for sealing.

[0068] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A plate frame driving mechanism, characterized in that: A plurality of housing piston spaces (21) are provided on the pressure bearing plate (2), and a pressure medium pipeline (24) is provided in the pressure bearing plate (2); a piston rod (3) is fixed in the housing piston space (21), and a through hole (31) is provided in the piston rod (3), and the through hole (31) is connected to the pressure medium pipeline (24); a housing (4) is sleeved on the outer periphery of the piston rod (3), and the inner cavity of the housing (4) is connected to the through hole (31), and the housing (4) can slide up and down along the piston rod (3); the housing (4) is limited by a gland (5) at the mouth of the housing piston space (21).

2. The plate frame driving mechanism according to claim 1, characterized in that: A boss (23) is provided in the housing piston space (21) of the pressure plate (2), and the piston rod (3) is connected to the boss (23); a pressure medium channel (22) is provided in the boss (23), and the pressure medium channel (22) connects the through hole (31) of the piston rod (3) and the pressure medium pipeline (24); the pressure medium channel (22) and the pressure medium pipeline (24) are orthogonal, and the pressure medium pipeline (24) is connected to the bottom of the pressure medium channel (22).

3. The plate frame driving mechanism according to claim 2, characterized in that: The boss (23) is provided with an external thread, the through hole (31) of the piston rod (3) is provided with an internal thread, and the piston rod (3) is threadably connected to the boss (23) through the internal thread matching the external thread.

4. The plate frame driving mechanism according to claim 2, characterized in that: An internal thread is provided in the pressure medium passage (22) of the boss (23); a hollow bolt (7) is used in the through hole (31) of the piston rod (3) and the pressure medium passage (22) of the boss (23) to achieve fixed connection between the piston rod (3) and the boss (23); a central passage (71) of the hollow bolt (7) is connected to the pressure medium pipeline (24).

5. The plate frame driving mechanism according to claim 1, characterized in that: The upper end of the housing piston space (21) is connected to the gland (5), the housing (4) is inserted into the gland (5), an inner step is arranged inside the gland (5), an outer step is arranged outside the housing (4), and the outer step cooperates with the inner step to achieve position limiting; a waterproof sealing groove (51) and a guide groove (52) are also provided inside the gland (5), a waterproof sealing ring and a guide ring are respectively installed in the waterproof sealing groove (51) and the guide groove (52); or a waterproof and oil-proof combination ring is arranged in the waterproof sealing groove (51).

6. The plate frame driving mechanism according to claim 5, characterized in that: The gland (5) is fixed to the pressure plate (2) by threaded engagement or by fasteners, and a sealant or a sealing ring is provided between the gland (5) and the pressure plate (2).

7. The plate frame driving mechanism according to claim 1, characterized in that: A guide sleeve (6) is arranged between the housing (4) and the piston rod (3), and the piston rod (3) is inserted into a guide hole (61) of the guide sleeve (6); a sealing groove is provided on the inner side and / or the outer side of the guide sleeve (6), and a sealing ring is installed in the sealing groove; an internal thread is processed inside the housing (4), and an external thread is processed outside the guide sleeve (6), and the guide sleeve (6) is threadedly connected to the housing (4) by means of the internal thread matching the external thread; or the guide sleeve (6) is integrally connected to the housing (4).

8. The plate frame driving mechanism according to claim 1, characterized in that: An outer ring groove (41) is provided on the outer circumference of the lower part of the shell (4), and an outer support ring (8) is arranged in the outer ring groove (41); a first inner ring groove (42), a second inner ring groove (43), and a third inner ring groove (44) are provided on the inner circumference of the shell (4); an inner support ring (9) is arranged in the first inner ring groove (42), a step seal is arranged in the second inner ring groove (43), and a Y-shaped ring is arranged in the third inner ring groove (44).

9. The plate frame driving mechanism according to claim 1, characterized in that: A piston rod sealing groove (311) is provided in the through hole (31) of the piston rod (3), and a sealing ring is provided in the piston rod sealing groove (311); the upper end of the through hole (31) of the piston rod (3) is processed into a polygon; and the outer side of the housing (4) is coated with a corrosion-resistant material.

10. A plate and frame filter press device, characterized in that: The plate frame driving mechanism as claimed in any one of claims 1 to 9 further comprises a push plate (1). When in operation, the top surface of the shell (4) contacts the bottom surface of the push plate (1) and acts on the push plate (1).

11. The plate and frame filter press device according to claim 10, characterized in that: A plurality of first guide holes (11) are formed on the push plate (1), and a plurality of second guide holes (25) are formed on the pressure plate (2) correspondingly. A fixing sleeve (10) is connected to the second guide hole (25). A copper sleeve (20) is inserted into the fixing sleeve (10). The copper sleeve (20) is pressed against a step surface of the fixing sleeve (10) by a retaining spring (50). A guide rod (30) is inserted into the copper sleeve (20). The guide rod (30) is fixedly connected to the push plate (1) by a screw rod (40). A sealing ring is provided between the guide rod (30) and the fixing sleeve (10) for sealing.

12. The plate and frame filter press device according to claim 10, characterized in that: The push plate (1) is provided with a plurality of first limit blocks (12); the pressure plate (2) is provided with a plurality of second limit blocks (26), and the second limit blocks (26) and the first limit blocks (12) of the push plate (1) are located at different side edges.

13. The plate and frame filter press device according to claim 12, characterized in that: The second limiting block (26) has a longitudinal limiting portion (261) and a transverse limiting portion (262), wherein the longitudinal limiting portion (261) limits the longitudinal displacement of the push plate (1), and the transverse limiting portion (262) limits the transverse displacement of the push plate (1).

14. The plate and frame filter press device according to claim 10, characterized in that: A convex piece (27) is provided on the outer edge of the pressure plate (2), and a hook plate (60) is correspondingly provided on the push plate (1), and the hook plate (60) cooperates with the convex piece (27) to form a limiting structure.

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