A filter press device and filtering method for electrolytic zinc production

Abstract

The present invention belongs to the technical field of filter press equipment, and discloses a filter press device and filtering method for electrolytic zinc production, including a filter press cartridge, a drive assembly, a filter assembly, a push ring, a contraction assembly, and a push rod sliding in the filter press cartridge, wherein the filter press cartridge is fixedly mounted on a body bracket, the drive assembly is fixedly mounted on the body bracket, the drive assembly is used to drive the push rod to move along the axial direction, the filter assembly is slidably connected in the filter press cartridge and sleeved on the push rod, and includes a mounting sleeve, the outer wall of the mounting sleeve is provided with at least two slide grooves, and the inner wall of the slide groove is provided with a locking assembly. In the present invention, when the filter screen moves toward the outside of the filter press cartridge, the filter residue compressed into a disc shape gradually separates from the inner wall of the filter press cartridge at its circumferential edge, thereby reducing the contact area between the structures, and when moving at the same time, the filter residue attached to the filter screen is loosened, and the filter screen can push the filter residue out of the filter press cartridge, thereby realizing rapid slag discharge.

Description

Technical Field

[0001] The invention relates to the field of filter pressing equipment, and more specifically to a filter pressing device and a filtering method for electrolytic zinc production. Background Art

[0002] Electrolytic zinc is a chemical process that uses electrolytic technology to refine zinc. This process is carried out in a special electrolytic cell filled with electrolyte. Through electrolysis, pure zinc can be separated from the raw materials. However, the directly produced electrolytic zinc often contains a large amount of water and residual electrolyte, which constitutes an obstacle to the subsequent preparation of zinc powder. Therefore, the solid-liquid separation of the produced electrolytic zinc can be carried out through a filter press.

[0003] However, when the existing filter press device for electrolytic zinc production completes the filtration task and separates the filter press plate, the compressed filter residue has a large density and will be firmly pressed against the plate frame, resulting in poor slag discharge. It is necessary to rely on manual cleaning of the residual filter residue on the filter cloth. This step not only has a cumbersome operation process, but also consumes a lot of manpower and reduces the filtration efficiency. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a filter press device and a filtering method for electrolytic zinc production, which can reduce the contact area between structures and loosen the filter residue attached to the filter screen, thereby achieving rapid slag discharge.

[0005] In order to solve the above technical problems, the present invention proposes a filter press device for electrolytic zinc production, including a filter press cartridge, a drive assembly, a filter assembly, a push ring, a contraction assembly, and a push rod sliding in the filter press cartridge, the filter press cartridge is fixedly mounted on a body bracket, the drive assembly is fixedly mounted on the body bracket, the drive assembly is used to drive the push rod to move along the axial direction, the filter assembly is slidably connected in the filter press cartridge and sleeved on the push rod, and includes a mounting sleeve, the outer wall of the mounting sleeve is provided with at least two slide grooves, the inner wall of the slide groove is provided with a locking assembly, the push ring is fixedly connected to the outer wall of the push rod, one end of the push ring is provided with a buffer surface, and the push ring The push ring is provided with an extrusion surface at the other end, and the push ring slides toward the outside of the filter press, and pushes the locking assembly to move through the extrusion surface, and drives the filter assembly to move to the outside of the filter press through the locking assembly, and pushes the filter residue produced after filtration out of the filter press; the shrinkage assembly is fixedly connected to the outer wall of the filter assembly; when the filter assembly moves to the outside of the filter press, the shrinkage assembly is in an elastically tightened state and limits the filter assembly; the push ring passes through the locking assembly when the shrinkage assembly is in an elastically tightened state, and the shrinkage assembly pulls the filter assembly to slide into the filter press in the elastically contracted state.

[0006] Preferably, the filter assembly also includes a fixing frame, the outer wall of the fixing frame is fixedly connected to a third sealing ring, the inner wall of the fixing frame is fixedly connected to the mounting sleeve, the end face of the fixing frame is fixedly connected to a filter screen, the inner wall of the filter screen is fixedly connected to the mounting sleeve, and the filter screen has the same diameter as the fixing frame.

[0007] Preferably, a second ring is fixedly connected to the inner wall of the mounting sleeve, a fourth sealing ring is fixedly connected to the inner wall of the second ring, and the fourth sealing ring is slidably connected to the outer wall of the push rod.

[0008] Preferably, the locking assembly includes a sliding rod, the outer wall of the sliding rod is sleeved with a first spring, the outer wall of the sliding rod is slidably connected to a sliding seat, the inner wall of the sliding seat is rotatably connected to a rotating shaft, the ends of the rotating shaft pass through the sliding seat and extend to its outside, the ends of the rotating shaft are fixedly connected to end covers, the ends of the rotating shaft are sleeved with torsion springs, the outer wall of the rotating shaft is fixedly connected to a support arm, the inner wall of the sliding seat is fixedly connected to a limiting plate, and the limiting plate is used to limit the support arm.

[0009] Preferably, one end of the first spring is fixedly connected to the inner wall of the mounting sleeve, and the other end of the first spring is fixedly connected to the slide seat; one end of the torsion spring is fixedly connected to the end cover, and the other end of the torsion spring is fixedly connected to the slide seat.

[0010] Preferably, the contraction assembly includes a first guide rod and a second guide rod, two ends of the first guide rod are fixedly connected to the fixing frame and the mounting sleeve respectively, the outer wall of the first guide rod is provided with a second spring, the outer wall of the first guide rod is slidably connected to the first hinge seat, one end of the second spring is fixedly connected to the fixing frame, the other end of the second spring is fixedly connected to the first hinge seat, the inner wall of the first hinge seat is rotatably connected to a connecting arm, the ends of the second guide rod are fixedly connected to a support block, the outer wall of the support block is fixedly connected to the inner wall of the filter press, the outer wall of the second guide rod is slidably connected to the second hinge seat, the second hinge seat is rotatably connected to the connecting arm, the outer wall of the second guide rod is provided with a third spring, one end of the third spring is fixedly connected to the support block, and the other end of the third spring is fixedly connected to the second hinge seat.

[0011] Preferably, at least two limit blocks are fixedly connected to the outer wall of the filter screen, and when the first hinge seat slides along the first guide rod, its end portion squeezes the limit blocks.

[0012] Preferably, the driving assembly comprises a hydraulic rod, and an output end of the hydraulic rod is fixedly connected to the push rod.

[0013] Preferably, a first ring is fixedly connected to the inner wall of the filter press cartridge, a first sealing ring is fixedly connected to the inner wall of the first ring, the first sealing ring is slidably connected to the outer wall of the push rod, a sliding cavity is opened in the inner wall of the filter press cartridge, the third sealing ring is slidably connected to the inner wall of the sliding cavity, an extrusion plate is sleeved on the inner wall of the filter press cartridge, the extrusion plate is fixedly connected to the push rod, a second sealing ring is fixedly connected to the outer wall of the extrusion plate, the second sealing ring is slidably connected to the inner wall of the sliding cavity, and the inner end wall of the sliding cavity is used to limit the fixed frame.

[0014] A filtering method for a filter press device for electrolytic zinc production, comprising the following steps:

[0015] S1. The hydraulic rod drives the push rod to move along the axial direction. When the push rod moves, it drives the squeeze plate to move into the filter press. When the squeeze plate moves into the filter press, the external liquid to be filtered enters the filter press.

[0016] S2. When the push rod moves, it drives the push ring to move into the filter cartridge. The end face of the fixed frame is blocked by the end face of the sliding cavity. The extrusion plate approaches the filter screen. When the liquid to be filtered is filtered, the push ring passes through the fourth sealing ring, and the buffer surface on the push ring passes through the support arm. At this time, the liquid produced by the filtration is discharged from the filter cartridge, and the filter residue is retained on the filter screen.

[0017] S3, the hydraulic rod drives the push rod to move in the reverse direction, at which time the extrusion plate slides toward the outside of the filter press, and the push ring squeezes the support arm through the extrusion surface. The push ring is blocked by the limit plate, and at this time, the push ring pushes the installation sleeve to move through the support arm, and the installation sleeve drives the fixing frame to move, and the fixing frame drives the filter screen to move toward the outside of the filter press;

[0018] S4, when the fixed frame moves, the connecting arm is stretched, the first hinge seat slides along the first guide rod, and the second hinge seat slides along the second guide rod, so that the second spring and the third spring are stretched at the same time, and when the fixed frame moves to the outside of the filter cartridge, the connecting arm limits the fixed frame;

[0019] S5, when the first hinge seat slides, the limit block on the filter screen is squeezed, and at this time, the outer wall of the filter screen outside the filter press cylinder bulges outward, so that the filter residue falls off the filter screen quickly;

[0020] S6. The push rod continues to move in the reverse direction. As the connecting arm limits the fixed frame and the limit plate blocks the support arm, when the extrusion surface on the push ring squeezes the support arm, the slide seat slides along the slide rod and compresses the first spring, so that the distance between the support arms is expanded, and the push ring can move to the other side of the mounting sleeve. After the push ring loses the blocking effect on the support arm, the fixed frame drives the filter screen to slide in the reverse direction to the inside of the filter cartridge under the pulling force of the second spring and the third spring.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. In the present invention, the hydraulic rod drives the push rod to move. First, the extrusion disc enters the pressure filter cylinder for pressure filtration. The filtrate is discharged while the filter residue remains on the filter screen. Subsequently, the hydraulic rod moves in the reverse direction, and the push rod drives the push ring to squeeze and push the mounting sleeve and the fixing frame through the support arm, thereby driving the filter screen and the filter residue thereon to move towards the outside of the pressure filter cylinder. When the filter screen moves towards the outside of the pressure filter cylinder, the filter residue compressed into a disc shape has its peripheral edge gradually separated from the inner wall of the pressure filter cylinder, thereby reducing the contact area between the structures. At the same time, during the movement, it is also easy to loosen the filter residue attached to the filter screen. The filter screen can push the filter residue out of the pressure filter cylinder internally, achieving rapid slag discharge. Compared with the filter screen fixedly installed in the pressure filtration chamber in the traditional way, the filter screen in this device can move on the inner wall of the pressure filter cylinder, push the filter residue out of the filter cylinder, and is more likely to discharge the filter residue inside the pressure filter cylinder completely, improving the slag discharge efficiency.

[0023] 2. In the present invention, due to the fact that the filter cloth on the traditional pressure filtration device has a certain water absorption property itself, the contact surface between the filter cloth and the filter residue is relatively moist, which will lead to greater difficulty in slag discharge. However, the filter screen structure in the present invention is made of metal material and does not have water absorption property. Compared with the filter cloth, it is easier for the filter residue to fall off. And the metal filter screen can ensure the stability of the filter hole size, while the filter holes of the traditional filter cloth are easily affected by pressure, tension, humidity and temperature, resulting in changes in the filter hole size and affecting the filtration effect. Therefore, compared with the traditional filter cloth, the metal filter screen in the present invention has improved filtration effect and efficiency.

[0024] 3. When the first hinge seat slides in the present invention, it squeezes the limit block on the filter screen. At this time, the outer wall of the filter screen located outside the pressure filter cylinder bulges, thereby reducing the contact area between the filter residue and the filter screen. And the change in the shape of the filter screen will also cause a change in the attachment position of the filter residue, thereby changing the filter residue from being tightly attached to being loosely attached, and at the same time breaking the filter residue and quickly falling off from the filter screen, thus avoiding manual cleaning of the filter residue on the filter screen and reducing the labor cost and labor intensity.

[0025] 4. When the extrusion surface on the push ring squeezes the support arm in the present invention, the sliding seat slides along the sliding rod and compresses the first spring, causing the distance between the support arms to expand. The push ring can smoothly move to the other side of the mounting sleeve, thus losing the block on the support arm. Under the pulling force of the second spring and the third spring, the fixing frame drives the filter screen to slide reversely into the pressure filter cylinder internally, preparing for the next pressure filtration process. This design can realize the automatic reset of the filter screen during the slag discharge process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0027] Figure 1 Schematic diagram of the overall structure of the present invention;

[0028] Figure 2 Schematic diagram of the installation structure of the conveyor of the present invention;

[0029] Figure 3 Schematic diagram of the internal installation structure of the filter pressing cylinder of the present invention;

[0030] Figure 4 Schematic diagram of the partial structure of the filter pressing cylinder of the present invention;

[0031] Figure 5 Schematic diagram of the partial structure of the push ring of the present invention;

[0032] Figure 6 Schematic diagram of the installation structure of the extrusion disc of the present invention;

[0033] Figure 7 Schematic diagram of the installation structure of the second set ring of the present invention

[0034] Figure 8 Schematic diagram of the installation structure of the support arm of the present invention;

[0035] Fig. 9 Schematic diagram of the installation structure of the filter screen of the present invention;

[0036] Fig.10 Schematic diagram of the installation structure of the connecting arm of the present invention.

[0037] Explanation of the reference numerals in the figure: 1. Support frame; 2. Extension plate; 3. Conveyor; 4. Side plate; 5. Fixed plate; 6. Guide pipe; 7. Drain pipe; 8. Water injection pipe; 9. Water inlet pipe; 10. Support plate; 11. Frame; 12. Hydraulic rod; 13. Filter press; 14. Sliding cavity; 15. First sleeve ring; 16. First sealing ring; 17. Extrusion plate; 18. Second sealing ring; 19. Push rod; 20. Push ring; 21. Buffer surface; 22. Extrusion surface; 23. Fixed frame; 24. The third sealing ring; 25. The mounting sleeve; 26. The second sleeve ring; 27. The fourth sealing ring; 28. The slide groove; 29. ​​The slide rod; 30. The first spring; 31. The slide seat; 32. The limit plate; 33. The rotating shaft; 34. The torsion spring; 35. The end cover; 36. The support arm; 37. The filter screen; 38. The limit block; 39. The first guide rod; 40. The first hinge seat; 41. The second spring; 42. The connecting arm; 43. The support block; 44. The second guide rod; 45. The second hinge seat; 46. The third spring. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The specific embodiments of the present invention are described in detail in conjunction with the drawings in the specification.

[0039] like Figure 1 , Figure 3-Figure 5As shown, a filter press device for electrolytic zinc production includes a filter press cartridge 13, a drive assembly, a filter assembly, a push ring 20, a contraction assembly, and a push rod 19 sliding in the filter press cartridge 13, the filter press cartridge 13 is fixedly mounted on a body bracket, the drive assembly is fixedly mounted on the body bracket, the drive assembly is used to drive the push rod 19 to move along the axial direction, the filter assembly is slidably connected in the filter press cartridge 13, and is sleeved on the push rod 19, which includes a mounting sleeve 25, the outer wall of the mounting sleeve 25 is provided with at least two slide grooves 28, the inner wall of the slide groove 28 is provided with a locking assembly, the push ring 20 is fixedly connected to the outer wall of the push rod 19, one end of the push ring 20 is provided with a buffer surface 21, and the push ring 20 is pressed against the pressure The push ring 20 moves inside the filter cartridge 13 and passes through the locking assembly through the buffer surface 21. An extrusion surface 22 is provided at the other end of the push ring 20. The push ring 20 slides outside the filter cartridge 13, pushes the locking assembly to move through the extrusion surface 22, and drives the filter assembly to move to the outside of the filter cartridge 13 through the locking assembly, and pushes the filter residue produced after filtration out of the filter cartridge 13. The shrinkage assembly is fixedly connected to the outer wall of the filter assembly. When the filter assembly moves to the outside of the filter cartridge 13, the shrinkage assembly is in an elastically tightened state and limits the filter assembly. The push ring 20 passes through the locking assembly when the shrinkage assembly is in an elastically tightened state, and the shrinkage assembly pulls the filter assembly to slide into the filter cartridge 13 in the elastically contracted state.

[0040] Since the filter cloth on the traditional filter press device has a certain degree of water absorption, the contact surface between the filter cloth and the filter residue is relatively moist, which makes it difficult to discharge the residue. The filter screen 37 in the present invention is made of metal and is not water-absorbent, which can facilitate the removal of the filter residue to a certain extent.

[0041] Moreover, the metal filter 37 can ensure the stability of the filter hole size, while the filter holes of traditional filter cloth are easily affected by pressure, tension, humidity and temperature, resulting in changes in the size and shape of the filter holes. The change in shape will make it impossible to effectively filter the particles in the liquid during filtration. Therefore, the metal filter 37 in the present invention has better filtering effect, efficiency and stability than traditional filter cloth.

[0042] like Fig. 9 As shown, the filter assembly also includes a fixing frame 23, the outer wall of the fixing frame 23 is fixedly connected with a third sealing ring 24, the third sealing ring 24 and the filter cartridge 13 can play a sealing role, the inner wall of the fixing frame 23 is fixedly connected with the mounting sleeve 25, the end face of the fixing frame 23 is fixedly connected with a filter screen 37, the inner wall of the filter screen 37 is fixedly connected with the mounting sleeve 25, and the filter screen 37 has the same diameter as the fixing frame 23; the filter screen 37 is an arc-shaped structure, and its protrusion is connected to the fixing frame 23, the fixing frame 23 can effectively fix the filter screen 37, and the filter screen 37 forms a plurality of fan-shaped areas under the fixation of the fixing frame 23, and no support body is provided in the fan-shaped area, so that the limit block 38 can be squeezed to produce a certain degree of arc-shaped protrusion, which is convenient for the separation of the filter residue.

[0043] When the filter screen 37 is squeezed, the outer wall of the filter screen 37 located outside the filter press cylinder 13 bulges outward, thereby reducing the contact area between the filter residue and the filter screen 37. The change in the shape of the filter screen 37 will also cause a change in the attachment position of the filter residue, thereby causing the filter residue to change from tightly attached to loosely attached, and at the same time causing the filter residue to break up and quickly fall off the filter screen 37.

[0044] The filter screen 37 with an arc structure can protrude a longer distance when protruding toward the side close to the extrusion plate 17, thereby increasing the gap between the filter residue and the arc wall of the filter screen 37, making it easier for the filter residue to fall off.

[0045] like Figure 7 As shown, the inner wall of the mounting sleeve 25 is fixedly connected with a second sleeve ring 26, the inner wall of the second sleeve ring 26 is fixedly connected with a fourth sealing ring 27, the fourth sealing ring 27 is slidably connected with the outer wall of the push rod 19, and the fourth sealing ring 27 and the push rod 19 play a sealing role.

[0046] like Figure 7-10 As shown, the locking assembly includes a slide bar 29, the outer wall of the slide bar 29 is sleeved with a first spring 30, the outer wall of the slide bar 29 is slidably connected to a slide seat 31, one end of the first spring 30 is fixedly connected to the inner wall of the mounting sleeve 25, the other end of the first spring 30 is fixedly connected to the slide seat 31, the inner wall of the slide seat 31 is rotatably connected to a rotating shaft 33, the end of the rotating shaft 33 passes through the slide seat 31 and extends to its outside, the ends of the rotating shaft 33 are fixedly connected to end covers 35, the ends of the rotating shaft 33 are sleeved with a torsion spring 34, one end of the torsion spring 34 is fixedly connected to the end cover 35, the other end of the torsion spring 34 is fixedly connected to the slide seat 31, the outer wall of the rotating shaft 33 is fixedly connected to a support arm 36, the inner wall of the slide seat 31 is fixedly connected to a limiting plate 32, and the limiting plate 32 is used to limit the support arm 36;

[0047] The contraction assembly includes a first guide rod 39 and a second guide rod 44. The two ends of the first guide rod 39 are fixedly connected to the fixing frame 23 and the mounting sleeve 25 respectively. The outer wall of the first guide rod 39 is sleeved with a second spring 41. The outer wall of the first guide rod 39 is slidably connected with a first hinge seat 40. One end of the second spring 41 is fixedly connected to the fixing frame 23, and the other end of the second spring 41 is fixedly connected to the first hinge seat 40. The inner wall of the first hinge seat 40 is rotatably connected with a connecting arm 42. The ends of the second guide rod 44 are fixedly connected with a support block 43. The outer wall of the support block 43 is fixedly connected to the inner wall of the filter press cartridge 13. The outer wall of the second guide rod 44 is slidably connected with a second hinge seat 45. The second hinge seat 45 is rotatably connected to the connecting arm 42. The outer wall of the second guide rod 44 is sleeved with a third spring 46. One end of the third spring 46 is fixedly connected to the support block 43, and the other end of the third spring 46 is fixedly connected to the second hinge seat 45.

[0048] At least two limit blocks 38 are fixedly connected to the outer wall of the filter screen 37 . When the first hinge seat 40 slides along the first guide rod 39 , its end portion squeezes the limit blocks 38 .

[0049] When the extrusion surface 22 on the push ring 20 squeezes the support arm 36, the slide seat 31 slides along the slide rod 29 and compresses the first spring 30, so that the distance between the support arms 36 is expanded, and the push ring 20 can smoothly move to the other side of the mounting sleeve 25, thereby losing the obstruction to the support arm 36. Under the pulling force of the second spring 41 and the third spring 46, the fixing frame 23 drives the filter screen 37 to slide in the opposite direction to the inside of the filter press 13, preparing for the next filtration process. This design can realize the automatic resetting of the filter screen 37 during the slag discharge process.

[0050] like Figure 1 As shown, the driving assembly includes a hydraulic rod 12 , and the output end of the hydraulic rod 12 is fixedly connected to a push rod 19 .

[0051] like Figure 3 and Figure 4 As shown, a first sleeve 15 is fixedly connected to the inner wall of the filter press cartridge 13, a first sealing ring 16 is fixedly connected to the inner wall of the first sleeve 15, the first sealing ring 16 is slidably connected to the outer wall of the push rod 19, a sliding cavity 14 is opened on the inner wall of the filter press cartridge 13, a third sealing ring 24 is slidably connected to the inner wall of the sliding cavity 14, an extrusion plate 17 is sleeved on the inner wall of the filter press cartridge 13, the extrusion plate 17 is fixedly connected to the push rod 19, a second sealing ring 18 is fixedly connected to the outer wall of the extrusion plate 17, the second sealing ring 18 is slidably connected to the inner wall of the sliding cavity 14, and the inner end wall of the sliding cavity 14 is used to limit the fixed frame 23.

[0052] The first sealing ring 16 , the second sealing ring 18 and the third sealing ring 24 together form a multi-layer seal, which can prevent leakage of the liquid to be filtered during the filtration process and ensure the stability of the pressure inside the filter cartridge 13 .

[0053] The sliding connection among the first sealing ring 16, the second sealing ring 18 and the third sealing ring 24 ensures the sealing performance and allows the necessary sliding movement to meet the dynamic requirements during the filter pressing process.

[0054] The first sleeve ring 15 is used as a fixing member and is firmly connected to the inner wall of the filter press cylinder 13 , providing stable support for the first sealing ring 16 .

[0055] The sliding cavity 14 not only provides a sliding track for the second sealing ring 18 and the third sealing ring 24, but also limits the fixing frame 23 through its inner end wall, ensuring that there is enough gap space between the filter screen 37 and the filter press cylinder 13 to facilitate the rapid discharge of the filter liquid.

[0056] like Figure 1 and Figure 2As shown, the body support includes two support frames 1, a side plate 4 is fixedly connected between the two support frames 1, the outer walls of the side plates 4 are fixedly connected with a support plate 10, the support plate 10 is fixedly connected to the filter cartridge 13, one of the support frames 1 is fixedly connected to the outer wall of the extension plate 2, the inner wall of the other support frame 1 is installed with a conveyor 3, the other end of the conveyor 3 is fixedly installed on the extension plate 2, the inner walls of the support frames 1 are fixedly connected with a frame 11, and the frame 11 is fixedly connected to the hydraulic rod 12;

[0057] A fixed plate 5 is fixedly connected between the two support frames 1, a drainage pipe 7 is fixedly connected to the inner wall of the fixed plate 5, the drainage pipe 7 is fixedly connected to the filter press cartridge 13, a flow guide pipe 6 is fixedly connected to the outer wall of the fixed plate 5, a water injection pipe 8 is fixedly connected to the outer wall of the side plate 4, a water inlet pipe 9 is fixedly connected to the outer wall of the water injection pipe 8, and the end of the water inlet pipe 9 is fixedly connected to the filter press cartridge 13;

[0058] The liquid to be filtered is injected into the water inlet pipe 9 through the water injection pipe 8, and enters the filter press cylinder 13 through the water inlet pipe 9. The external water pump extracts the liquid in the filter press cylinder 13 through the guide pipe 6 and the drain pipe 7; the separated filter residue falls on the conveyor 3, and the filter residue is discharged in a centralized manner through the conveyor 3;

[0059] The liquid to be filtered is injected into the water inlet pipe 9 through the water injection pipe 8, and then enters the filter press cylinder 13, ensuring that the liquid to be filtered can accurately enter the filter press area, and at the same time provides a stable liquid source for the subsequent filter press process; the external water pump extracts the liquid in the filter press cylinder 13 through the guide pipe 6 and the drain pipe 7. The liquid after the filter press can be discharged, and the discharged filter residue can be quickly cleaned out from the bottom of the device through the conveyor 3.

[0060] Working principle: The hydraulic rod 12 drives the push rod 19 to move along the axial direction. When the push rod 19 moves, it drives the squeeze plate 17 to move into the filter press cylinder 13. When the squeeze plate 17 moves into the filter press cylinder 13, the external liquid to be filtered enters the filter press cylinder 13.

[0061] When the push rod 19 moves, it drives the push ring 20 to move into the filter cartridge 13. The end surface of the fixed frame 23 is blocked by the end surface of the sliding cavity 14. The squeeze plate 17 approaches the filter screen 37. When the liquid to be filtered is filtered, the push ring 20 passes through the fourth sealing ring 27, and the buffer surface 21 on the push ring 20 passes through the support arm 36. At this time, the liquid produced by the filter press is discharged from the filter cartridge 13, and the filter residue is retained on the filter screen 37.

[0062] The hydraulic rod 12 drives the push rod 19 to move in the reverse direction, and the extrusion plate 17 slides toward the outside of the filter press cartridge 13. The push ring 20 squeezes the support arm 36 through the extrusion surface 22. The push ring 20 pushes the mounting sleeve 25 to move through the support arm 36 through the blocking of the limit plate 32. The mounting sleeve 25 drives the fixing frame 23 to move, and the fixing frame 23 drives the filter screen 37 to move toward the outside of the filter press cartridge 13.

[0063] When the fixing frame 23 moves, the connecting arm 42 is stretched, the first hinge seat 40 slides along the first guide rod 39, and the second hinge seat 45 slides along the second guide rod 44, so that the second spring 41 and the third spring 46 are stretched at the same time. When the fixing frame 23 moves to the outside of the filter cartridge 13, the connecting arm 42 limits the fixing frame 23.

[0064] When the first hinge seat 40 slides, the limit block 38 on the filter screen 37 is squeezed. At this time, the outer wall of the filter screen 37 outside the filter press cylinder 13 bulges outward, thereby reducing the contact area between the filter residue and the filter screen 37 and breaking the filter residue so that the filter residue falls off the filter screen 37 quickly.

[0065] The push rod 19 continues to move in the reverse direction. Since the connecting arm 42 limits the fixing frame 23 and the limiting plate 32 blocks the support arm 36, when the extrusion surface 22 on the push ring 20 squeezes the support arm 36, the slide seat 31 slides along the slide rod 29 and compresses the first spring 30, so that the distance between the support arms 36 is enlarged, and the push ring 20 can move to the other side of the mounting sleeve 25. After the push ring 20 loses the blocking of the support arm 36, under the pulling force of the second spring 41 and the third spring 46, the fixing frame 23 drives the filter screen 37 to slide in the reverse direction to the inside of the filter cartridge 13.

[0066] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A filter press device for electrolytic zinc production, characterized in that: include: A filter press cartridge (13), the filter press cartridge (13) being fixedly mounted on a machine body bracket, a push rod (19) being slidably connected inside the filter press cartridge (13), an extrusion plate (17) being sleeved on the inner wall of the filter press cartridge (13), and the extrusion plate (17) being fixedly connected to the push rod (19); A drive assembly, the drive assembly being fixedly mounted on the machine body support, the drive assembly being used to drive the push rod (19) to move along the axial direction; A filter assembly, the filter assembly is slidably connected in the filter cartridge (13) and sleeved on the push rod (19), comprising a mounting sleeve (25), the outer wall of the mounting sleeve (25) being provided with at least two slide grooves (28), and the inner wall of the slide groove (28) being provided with a locking assembly; A push ring (20), the push ring (20) being fixedly connected to the outer wall of the push rod (19), a buffer surface (21) being provided at one end of the push ring (20), the push ring (20) moving into the filter cartridge (13) and passing through the locking assembly via the buffer surface (21), the push ring (20) being provided at the other end with an extrusion surface (22), the push ring (20) sliding outward from the filter cartridge (13), pushing the locking assembly to move via the extrusion surface (22), and driving the filter assembly to move to the outside of the filter cartridge (13) via the locking assembly, thereby pushing the filter residue produced after filtration out of the filter cartridge (13); A contraction assembly is fixedly connected to the outer wall of the filter assembly. When the filter assembly moves to the outside of the filter cartridge (13), the contraction assembly is in an elastically tightened state and limits the filter assembly. The push ring (20) passes through the locking assembly when the contraction assembly is in an elastically tightened state. When the contraction assembly is in an elastically contracted state, the filter assembly is pulled to slide into the filter cartridge (13).

2. The filter press device for electrolytic zinc production according to claim 1, characterized in that: The filter assembly further comprises a fixing frame (23), the outer wall of the fixing frame (23) being fixedly connected to a third sealing ring (24), the inner wall of the fixing frame (23) being fixedly connected to a mounting sleeve (25), the end surface of the fixing frame (23) being fixedly connected to a filter screen (37), the inner wall of the filter screen (37) being fixedly connected to the mounting sleeve (25), and the filter screen (37) and the fixing frame (23) having the same diameter.

3. The filter press device for electrolytic zinc production according to claim 2, characterized in that: A second sleeve ring (26) is fixedly connected to the inner wall of the mounting sleeve (25), a fourth sealing ring (27) is fixedly connected to the inner wall of the second sleeve ring (26), and the fourth sealing ring (27) is slidably connected to the outer wall of the push rod (19).

4. The filter press device for electrolytic zinc production according to claim 3, characterized in that: The locking assembly comprises a slide bar (29), the outer wall of the slide bar (29) is sleeved with a first spring (30), the outer wall of the slide bar (29) is slidably connected to a slide seat (31), the inner wall of the slide seat (31) is rotatably connected to a rotating shaft (33), the end of the rotating shaft (33) passes through the slide seat (31) and extends to the outside thereof, the end of the rotating shaft (33) is fixedly connected to an end cover (35), the end of the rotating shaft (33) is sleeved with a torsion spring (34), the outer wall of the rotating shaft (33) is fixedly connected to a support arm (36), the inner wall of the slide seat (31) is fixedly connected to a limiting plate (32), and the limiting plate (32) is used to limit the support arm (36).

5. The filter press device for electrolytic zinc production according to claim 4, characterized in that: One end of the first spring (30) is fixedly connected to the inner wall of the mounting sleeve (25), and the other end of the first spring (30) is fixedly connected to the slide seat (31); one end of the torsion spring (34) is fixedly connected to the end cover (35), and the other end of the torsion spring (34) is fixedly connected to the slide seat (31).

6. The filter press device for electrolytic zinc production according to claim 5, characterized in that: The retracting assembly comprises a first guide rod (39) and a second guide rod (44), the two ends of the first guide rod (39) being fixedly connected to the fixing frame (23) and the mounting sleeve (25) respectively, the outer wall of the first guide rod (39) being sleeved with a second spring (41), the outer wall of the first guide rod (39) being slidably connected to a first hinge seat (40), one end of the second spring (41) being fixedly connected to the fixing frame (23), the other end of the second spring (41) being fixedly connected to the first hinge seat (40), and the inner wall of the first hinge seat (40) being rotatably connected to a connecting rod The connecting arm (42) and the end of the second guide rod (44) are both fixedly connected to a support block (43), the outer wall of the support block (43) is fixedly connected to the inner wall of the filter cartridge (13), the outer wall of the second guide rod (44) is slidably connected to a second hinge seat (45), the second hinge seat (45) is rotatably connected to the connecting arm (42), and the outer wall of the second guide rod (44) is sleeved with a third spring (46), one end of the third spring (46) is fixedly connected to the support block (43), and the other end of the third spring (46) is fixedly connected to the second hinge seat (45).

7. The filter press device for electrolytic zinc production according to claim 6, characterized in that: At least two limit blocks (38) are fixedly connected to the outer wall of the filter screen (37), and when the first hinge seat (40) slides along the first guide rod (39), its end portion squeezes the limit blocks (38).

8. The filter press device for electrolytic zinc production according to claim 7, characterized in that: The driving assembly comprises a hydraulic rod (12), the output end of the hydraulic rod (12) being fixedly connected to a push rod (19).

9. The filter press device for electrolytic zinc production according to claim 8, characterized in that: The inner wall of the filter cartridge (13) is fixedly connected to a first sleeve (15), the inner wall of the first sleeve (15) is fixedly connected to a first sealing ring (16), the first sealing ring (16) is slidably connected to the outer wall of the push rod (19), the inner wall of the filter cartridge (13) is provided with a sliding cavity (14), the third sealing ring (24) is slidably connected to the inner wall of the sliding cavity (14), the outer wall of the extrusion plate (17) is fixedly connected to a second sealing ring (18), the second sealing ring (18) is slidably connected to the inner wall of the sliding cavity (14), and the inner end wall of the sliding cavity (14) is used to limit the fixed frame (23).

10. A filtering method for a filter press device for electrolytic zinc production, applicable to the filter press device for electrolytic zinc production according to claim 9, characterized in that: The following steps are involved: S1, the hydraulic rod (12) drives the push rod (19) to move along the axial direction, and when the push rod (19) moves, it drives the squeeze plate (17) to move into the filter press cylinder (13), and when the squeeze plate (17) moves into the filter press cylinder (13), the external liquid to be filtered enters the filter press cylinder (13); S2, when the push rod (19) moves, it drives the push ring (20) to move into the filter cartridge (13), the end surface of the fixed frame (23) is blocked by the end surface of the sliding cavity (14), the squeezing plate (17) approaches the filter screen (37), and when the liquid to be filtered is filtered, the push ring (20) passes through the fourth sealing ring (27), and the buffer surface (21) on the push ring (20) passes through the support arm (36). At this time, the liquid produced by the filtration is discharged from the filter cartridge (13), and the filter residue is retained on the filter screen (37); S3, the hydraulic rod (12) drives the push rod (19) to move in the reverse direction, at which time the extrusion plate (17) slides toward the outside of the filter cartridge (13), and the push ring (20) squeezes the support arm (36) through the extrusion surface (22). The push ring (20) pushes the mounting sleeve (25) to move through the support arm (36) through the blocking of the limit plate (32), and the mounting sleeve (25) drives the fixing frame (23) to move, and the fixing frame (23) drives the filter screen (37) to move toward the outside of the filter cartridge (13); S4, when the fixing frame (23) moves, the connecting arm (42) is stretched, the first hinge seat (40) slides along the first guide rod (39), and the second hinge seat (45) slides along the second guide rod (44), so that the second spring (41) and the third spring (46) are stretched at the same time, and when the fixing frame (23) moves to the outside of the filter cartridge (13), the connecting arm (42) limits the fixing frame (23); S5, when the first hinge seat (40) slides, the limit block (38) on the filter screen (37) is squeezed, and at this time, the outer wall of the filter screen (37) outside the filter press cylinder (13) bulges upward, so that the filter residue quickly falls off the filter screen (37); S6, the push rod (19) continues to move in the reverse direction. Since the connecting arm (42) limits the fixed frame (23) and the limiting plate (32) blocks the support arm (36), when the extrusion surface (22) on the push ring (20) squeezes the support arm (36), the slide seat (31) slides along the slide rod (29) and compresses the first spring (30), so that the distance between the support arms (36) is enlarged, and the push ring (20) can move to the other side of the mounting sleeve (25). After the push ring (20) loses the blocking of the support arm (36), under the pulling force of the second spring (41) and the third spring (46), the fixed frame (23) drives the filter screen (37) to slide in the reverse direction to the inside of the filter cartridge (13).

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