Nickel salt solution precision filtering device

Abstract

The application relates to the technical field of solution filtration, and discloses a nickel salt solution precision filtration device which comprises a supporting support and a hoisting side ear, a filter plate is fixedly arranged on the hoisting side ear, and filter cloth is arranged on the filter plate; the device further comprises a knocking vibration structure which comprises an upper base fixedly arranged on the filter plate, a lower base fixedly arranged on the filter plate and located below the upper base, and a lifting lead screw slidingly arranged on the upper base and the lower base; and a folding and stretching structure which comprises a mounting groove arranged on the upper base, a pulling seat fixedly arranged on the mounting groove, a side vertical rail fixedly arranged on the pulling seat, a telescopic arm slidingly arranged on the side vertical rail, and a shearing stretching assembly fixedly arranged on the side vertical rail. The application significantly enhances the inertial peeling effect of the surface attachments of the filter cloth, ensures the thoroughness of unloading, avoids the blockage caused by filter cake residues, and improves the overall operation efficiency and the service life of the filter cloth.

Description

Technical Field

[0001] This invention relates to the field of solution filtration technology, and more specifically to a precision filtration device for nickel salt solutions. Background Technology

[0002] Basic nickel carbonate is a basic carbonate of nickel, a pale green solid, and is commonly used as a raw material for the preparation of nickel salts and nickel catalysts. In actual production, high-purity nickel salt solutions are precisely filtered using a fully automatic filter press to remove mechanical impurities and tiny particles, thereby creating a clean environment for subsequent reactions and protecting downstream equipment. After the nickel salt solution is filtered by the filter press, a pull-plate trolley pulls open the filter plates, and the filter cake attached to the surface of the filter cloth falls off due to its own gravity and with the help of an external vibrating device that shakes the filter cloth.

[0003] However, existing external devices with rapping function can only perform single-point impact vibration on the filter plate. The vibration energy transmission is significantly attenuated, and the vibration amplitude is uneven across the entire filter cloth. It is difficult to overcome the adsorption force between the sticky filter cake and the filter cloth. The rapping unloading is insufficient, resulting in large pieces of sticky filter cake easily remaining on the surface of the filter cloth. This requires machine shutdown and manual cleaning, which affects the continuous and stable operation of the nickel salt solution filtration device. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a precision filtration device for nickel salt solutions. By driving the filter cloth pleats to expand and vibrate the filter cloth uniformly, the device achieves the effects of preventing filter cloth blockage, reducing downtime for cleaning, and ensuring continuous and stable filtration.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This invention provides a precision filtration device for nickel salt solutions, comprising: a support bracket and a lifting lug, wherein a filter plate is fixedly mounted on the lifting lug, and a filter cloth is disposed on the filter plate, and further comprising:

[0007] The vibration structure includes an upper base fixedly mounted on the filter plate, a lower base fixedly mounted on the filter plate and located below the upper base, a lifting screw slidably mounted on the upper base and the lower base, a connecting top plate fixedly mounted on the lifting screw, a first spring fixedly mounted between the connecting top plate and the upper base, and a transmission assembly fixedly mounted on the connecting top plate.

[0008] And, the folding structure includes a mounting groove disposed on the upper base, a lifting seat fixedly disposed on the mounting groove, a side vertical rail fixedly disposed on the lifting seat, a telescopic arm slidably disposed on the side vertical rail, and a shearing assembly fixedly disposed on the side vertical rail.

[0009] Preferably, a lower limit seat is fixedly provided at one end of the lifting screw extending below the lower base, a second spring is fixedly provided between the lower limit seat and the lower base, and the telescopic arm is fixedly provided on the lower limit seat.

[0010] Preferably, the transmission assembly includes a cross seat fixedly disposed on the connecting top plate, and a positioning rod slidably disposed on the cross seat, one end of the positioning rod being fixedly disposed on the filter plate.

[0011] Preferably, the cross seat is fixedly provided with a plurality of protrusions arranged in a linear array, the positioning rod is fixedly provided with an arc-shaped support plate, and the filter cloth is disposed on the arc-shaped support plate.

[0012] Preferably, a limiting groove is provided on the side vertical rail, a positioning block is slidably provided on the limiting groove, a blocking piece is fixedly provided at one end of the positioning block, and the other end of the positioning block is fixedly provided on the telescopic arm.

[0013] Preferably, the shearing assembly includes a hinged support fixedly disposed on the filter plate, a fixed arm fixedly disposed on the hinged support, and a hinged swing arm rotatably disposed on the hinged support and located on the side of the fixed arm.

[0014] Preferably, a hanging column is fixed to the fixed arm and the hinged swing arm respectively, the end of the fixed arm away from the hanging column is fixedly mounted on the side vertical rail, and a guide groove is provided at the end of the hinged swing arm away from the hanging column.

[0015] Preferably, the hinged swing arm is provided with a guide groove, the side vertical rail is provided with a sliding groove, and the telescopic arm is fixedly provided with a guide post, which is slidably disposed in the guide groove through the sliding groove.

[0016] Preferably, the hoisting side lug is slidably mounted on the support bracket, a side slide rod is fixedly mounted on the support bracket, control boxes are fixedly mounted at both ends of the side slide rod, and a pull plate trolley is slidably mounted on the side slide rod.

[0017] Preferably, a frame is fixedly mounted on the pull plate trolley, a hydraulic cylinder is fixedly mounted on the frame, a striking rod is slidably mounted on the hydraulic cylinder, a mounting bracket is fixedly mounted on the support bracket, and a hydraulic power station is fixedly mounted on the mounting bracket.

[0018] Compared with existing technologies, the beneficial effects achieved by this invention are as follows: Through the synergistic effect of the vibration structure and the folding structure, the viscous filter cake is efficiently removed during the filtration of nickel salt solutions. The traditional single-point impact vibration is transformed into multi-point high-frequency micro-amplitude vibration based on the instantaneous release of elastic energy. Combined with the controllable folding and stretching cyclic movement of the filter cloth, the vibration energy forms a uniform coverage across the entire filter cloth, effectively avoiding the problems of energy transmission attenuation and uneven local amplitude. This not only significantly enhances the inertial peeling effect of the deposits on the filter cloth surface, ensuring the thoroughness of unloading, but also avoids clogging caused by filter cake residue. This greatly reduces the frequency of equipment downtime for cleaning, ensures the long-term stable operation of the filtration device under continuous production conditions, and improves the overall operating efficiency and service life of the filter cloth. Attached Figure Description

[0019] Figure 1 Schematic diagram of the impact structure and bending structure of a precision filtration device for nickel salt solutions;

[0020] Figure 2 A schematic diagram of the impact structure and the bending structure of a precision filtration device for nickel salt solutions;

[0021] Figure 3 A schematic diagram of the filter cloth in a precision filtration device for nickel salt solutions;

[0022] Figure 4 A schematic diagram of the transmission components of a precision filtration device for nickel salt solutions;

[0023] Figure 5 A cross-sectional schematic diagram of the bow-shaped support plate of a precision filtration device for nickel salt solutions;

[0024] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0025] Figure 7 A side view of the bow-shaped support plate of a precision filtration device for nickel salt solutions;

[0026] Figure 8 Schematic diagram of the shearing and stretching assembly of a precision filtration device for nickel salt solutions;

[0027] Figure 9 This is a schematic diagram of a precision filtration device for nickel salt solutions.

[0028] Reference numerals: 101, Side slide bar; 101a, Control box; 102, Frame; 103, Pulling plate trolley; 104, Hydraulic cylinder; 105, Striking rod; 106, Lifting side lug; 107, Filter plate; 108, Filter cloth;

[0029] 200. Vibration structure; 201. Upper base; 202. Lower base; 203. Lifting screw; 203a. First spring; 204. Connecting top plate; 2051. Horizontal seat; 2052. Positioning rod; 2053. Protrusion; 2054. Bow-shaped support plate; 2061. Lower limit seat; 2062. Second spring; 300. Folding structure; 301. Mounting groove; 302. Lifting mechanism 303. Side vertical rail; 304. Telescopic arm; 3051. Limiting groove; 3052. Positioning block; 3053. Clamping plate; 3061. Sliding groove; 3062. Guide column; 3063. Fixed arm; 3064. Articulated swing arm; 3065. Guide groove; 3066. Hanging column; 3067. Articulated support; 401. Mounting bracket; 402. Hydraulic power station; 403. Support bracket. Detailed Implementation

[0030] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solution of the present invention, rather than limitations thereof.

[0031] like Figure 1 - Figure 9 As shown, this embodiment provides a precision filtration device for nickel salt solution, including a support bracket 403 and a lifting side lug 106. A filter plate 107 is fixedly installed on the lifting side lug 106, and a filter cloth 108 is installed on the filter plate 107.

[0032] Also includes:

[0033] The vibration structure 200 includes an upper base 201, a lower base 202, a lifting screw 203, a connecting top plate 204, a first spring 203a, and a transmission assembly. The upper base 201 is fixedly mounted on the filter plate 107, the lower base 202 is fixedly mounted on the filter plate 107 and located below the upper base 201, the lifting screw 203 is slidably mounted on the upper base 201 and the lower base 202, the connecting top plate 204 is fixedly mounted on the lifting screw 203, the first spring 203a is fixedly mounted between the connecting top plate 204 and the upper base 201, and the transmission assembly is fixedly mounted on the connecting top plate 204.

[0034] And, the folding structure 300 includes a mounting groove 301, a lifting seat 302, a side vertical rail 303, a telescopic arm 304, and a shearing assembly, wherein the mounting groove 301 is disposed on the upper base 201, the lifting seat 302 is fixedly disposed on the mounting groove 301, the side vertical rail 303 is fixedly disposed on the lifting seat 302, the telescopic arm 304 is slidably disposed on the side vertical rail 303, and the shearing assembly is fixedly disposed on the side vertical rail 303.

[0035] The hoisting side lug 106 is slidably mounted on the support bracket 403. A side slide rod 101 is fixedly mounted on the support bracket 403. Control boxes 101a are fixedly mounted at both ends of the side slide rod 101. A pull plate trolley 103 is slidably mounted on the side slide rod 101. A frame 102 is fixedly mounted on the pull plate trolley 103. A hydraulic cylinder 104 is fixedly mounted on the frame 102. A striking rod 105 is slidably mounted on the hydraulic cylinder 104.

[0036] The support bracket 403 serves as the base support for the entire nickel salt solution precision filtration device. The lifting lug 106 slides on the support bracket 403, and the side sliding rod 101 is mounted on it. The control box 101a controls the sliding plate trolley 103 to slide on the side sliding rod 101, thereby synchronously moving the frame 102. This drives the pulling plate trolley 103 to slide axially along the side sliding rod 101, moving it along with the upper frame 102 to the lifting lug 106. The pulling plate trolley 103 pulls the lifting lug 106, causing the filter plate 107 to move on the support bracket 403. The frame 102 remains fixed. The hydraulic cylinder 104 is then activated, driving the striking rod 105 to extend. The working principle of this part is existing technology, clearly understood by those skilled in the art, and will not be elaborated upon here.

[0037] The lifting screw 203 has a lower limit seat 2061 fixedly installed at one end extending below the lower base 202. A second spring 2062 is fixedly installed between the lower limit seat 2061 and the lower base 202. The telescopic arm 304 is fixedly installed on the lower limit seat 2061. A limit groove 3051 is provided on the side vertical rail 303. A positioning block 3052 is slidably installed on the limit groove 3051. A retaining piece 3053 is fixedly installed at one end of the positioning block 3052, and the other end of the positioning block 3052 is fixedly installed on the telescopic arm 304. The shearing assembly includes a hinge support 3067 fixedly installed on the filter plate 107, a fixed arm 3063 fixedly installed on the hinge support 3067, and a hinged swing arm 3064 rotatably installed on the hinge support 3067 and located on the side of the fixed arm 3063. A hanging column 3066 is fixed to both the fixed arm 3063 and the hinged swing arm 3064. The end of the fixed arm 3063 away from the hanging column 3066 is fixedly mounted on the side vertical rail 303. The end of the hinged swing arm 3064 away from the hanging column 3066 is provided with a guide groove 3065. The hinged swing arm 3064 is provided with the guide groove 3065, the side vertical rail 303 is provided with a sliding groove 3061, and the telescopic arm 304 is fixedly mounted with a guide post 3062. The guide post 3062 passes through the sliding groove 3061 and slides in the guide groove 3065.

[0038] Under the control of the hydraulic cylinder 104, the symmetrically distributed striking rods 105 on the frame 102 extend and strike the lifting screw 203 slidably connected to the upper base 201. The lifting screw 203 moves downward in the vertical direction. At this time, the first spring 203a is compressed, and the second spring 2062 located between the lower base 202 and the lower limit seat 2061 is stretched. The lower limit seat 2061 and the telescopic arm 304 on the lower limit seat 2061 move downward in the vertical direction simultaneously. The positioning block 3052 on the telescopic arm 304 slides downward along the limiting groove 3051 on the side vertical rail 303. The retaining plate 3053 ensures that the positioning block 3052 is always in the limiting groove 3051. Since the lifting seat 302 is installed on the upper base 201 through the mounting groove 301 and the side vertical rail 303 is fixedly installed on the lifting seat 302, the movement of the entire telescopic arm 304 will not be angularly offset.

[0039] The hinged support 3067 is installed on the edge of the filter plate 107. The filter cloth 108 is provided with lifting holes that match the hanging column 3066, so that the edge of the filter cloth 108 can be hung on the hanging column 3066. The fixed arm 3063 and the hinged swing arm 3064 are cross-installed on the hinged support 3067. Since one end of the fixed arm 3063 is fixedly installed on the side vertical rail 303, and the end of the hinged swing arm 3064 is slidably connected to the side vertical rail 303 through the guide groove 3065, the guide column 3062 and the sliding groove 3061, and since one end of the guide column 3062 is fixedly connected to the telescopic arm 304, the telescopic arm 304 moving downward in the vertical direction drives the guide... The column 3062 moves downward in the slide groove 3061, and the downward-moving guide column 3062 moves horizontally in the guide groove 3065. At this time, the hinged swing arm 3064 rotates relative to the fixed arm 3063 with the hinged support 3067 as the fulcrum. The horizontal angle between the fixed arm 3063 and the hinged swing arm 3064 decreases. Through the hanging column 3066, the filter cloth 108 located between the two hanging columns 3066 wrinkles. It should be noted that multiple fixed arms 3063 and hinged swing arms 3064 can be arranged, and the arrangement can be based on the required degree of wrinkling of the filter cloth 108, which can adapt to filter cakes with different viscosities and different adhesion states. The hinged structure drives the filter cloth 108 to actively form controllable folds, which can actively break the adhesion and adsorption state between the sticky filter cake and the surface of the filter cloth 108. This solves the problem that the traditional rapping method relies only on vibration and impact force and cannot break the strong adsorption force. It greatly improves the thoroughness of subsequent unloading, effectively avoids the problem of large pieces of sticky filter cake remaining on the filter cloth 108, and reduces the frequency of manual cleaning.

[0040] When the compressed first spring 203a and the stretched second spring 2062 return to their original positions, the telescopic arm 304 is pulled upwards vertically by the lower limit seat 2061 and the lifting screw 203. The guide post 3062 moves horizontally in the opposite direction along the guide groove 3065. The hinged swing arm 3064 rotates relative to the fixed arm 3063 with the hinge support 3067 as the fulcrum. The horizontal angle between the fixed arm 3063 and the hinged swing arm 3064 gradually returns to its original position. Through the support of the hanging column 3066, the filter cloth 108 pleats located between the two hanging columns 3066... The wrinkles disappear, completing a single pleated unloading cycle. It can be used in conjunction with a precision filtration device for nickel salt solutions for continuous reciprocating filtration operations without manual intervention. It achieves automated cyclic operation of filter cloth 108 pleating formation and resetting, adapting to continuous production conditions of filtration devices. It solves the drawbacks of incomplete unloading by traditional rapping and the need for manual cleaning during machine shutdown. It continuously maintains the permeability of filter cloth 108, avoids filter cake accumulation and blockage, and eliminates downtime problems caused by filter cloth 108 blockage and incomplete unloading, effectively improving the continuous running time of the equipment and the overall filtration efficiency.

[0041] Furthermore, the transmission assembly includes a cross seat 2051 fixedly mounted on the connecting top plate 204, and a positioning rod 2052 slidably mounted on the cross seat 2051, with one end of the positioning rod 2052 fixedly mounted on the filter plate 107. The cross seat 2051 is fixedly provided with a plurality of protrusions 2053 arranged in a linear array, and the positioning rod 2052 is fixedly provided with an arc-shaped support plate 2054, on which the filter cloth 108 is mounted.

[0042] Because the striking rod 105 strikes the lifting screw 203 instantaneously and multiple times, rather than continuously contacting the top of the lifting screw 203, when the compressed first spring 203a and the stretched second spring 2062 return to their original positions, the elastic force of the first spring 203a and the second spring 2062 instantaneously drives the connecting top plate 204 on the lifting screw 203 to move upward. The connecting top plate 204 drives the horizontal seat 2051 to slide on the positioning rod 2052. The protrusions 2053 installed at multiple points on the horizontal seat 2051 strike the bottom of the bow-shaped support plate 2054. The contact surface between the bow-shaped support plate 2054 and the filter cloth 108 adopts an arc surface design. That is to say, during the entire operation of the vibration structure 200, the filter cloth 108 and the bow-shaped support plate 2054 are in contact. The support plates 2054 are always in a taut state, and the filter cloth 108 located below the filter plate 107 is in a slightly loose state. When the folding structure 300 shears the filter cloth 108, it will not affect the normal use of the filter cloth 108. After being struck, the cross seat 2051 transmits the vibration along the arc surface to the filter cloth 108, causing the filter cloth 108 to produce high-frequency micro-amplitude vibration. Since the filter cloth 108 has already wrinkled before the impact, the filter cake attached to the inner surface of the filter cloth 108 is detached from the surface of the filter cloth 108 due to inertia and the wrinkling effect. The filter cake falls downward, realizing automatic dust removal of the filter cloth 108. The arc surface contact form can disperse the vibration stress, avoid local stress concentration of the filter cloth 108 causing damage, and continuously ensure the air permeability of the filter cloth 108.

[0043] It should be noted that the top of the filter cloth 108 is laid on the arc surface of the bow-shaped support plate 2054. The bow-shaped support plate 2054 can support the filter cloth 108 to form uniform folds, and vibration can be completely transmitted to the filter cloth 108 through the bow-shaped support plate 2054.

[0044] It should be noted that the high-frequency elastic force generated by the instantaneous rebound of the first spring 203a and the second spring 2062 drives the multi-point protrusions 2053 to strike and vibrate the bow-shaped support plate 2054, which can effectively reduce the attenuation in the vibration energy transmission process and solve the problems of low vibration transmission efficiency and uneven overall vibration amplitude of the filter cloth 108 in the traditional rapping structure, thereby increasing the area of ​​uniform vibration coverage of the filter cloth 108.

[0045] It is worth noting that the structural design of the linear array multi-point protrusions 2053 combined with the arc-shaped contact surface changes the force form of the traditional single-point concentrated vibration. The vibration can be evenly distributed and transmitted to all parts of the filter cloth 108, so that the filter cloth 108 generates stable high-frequency micro-amplitude vibration. Combined with the pleated shape of the filter cloth 108, the bonding surface between the filter cloth 108 and the sticky filter cake has been pre-destroyed. With the superposition of the uniform high-frequency vibration effect over the whole area, the adsorption force between the filter cake and the filter cloth 108 can be successfully overcome, allowing the attached sticky filter cake to fall off by inertia. This effectively solves the problems of large sticky filter cake residue and insufficient unloading, and eliminates the need for frequent machine shutdowns and manual cleaning of the filter cloth 108.

[0046] In summary, by combining high-frequency vibration with controllable pleating, the efficiency of removing viscous filter cake and the filtration capacity of filter cloth 108 are significantly improved. Multi-point dispersed vibration effectively avoids vibration attenuation and stress concentration caused by traditional single-point impact, allowing vibration energy to be uniformly transmitted throughout the filter cloth 108. This ensures that all areas of the filter cloth 108 obtain the same shaking effect, thereby overcoming the strong adsorption force between the filter cake and the filter cloth 108, significantly reducing the surface residue rate of the filter cloth 108, reducing downtime caused by clogging or incomplete unloading, extending the continuous service life of the filter cloth 108, eliminating the need for manual cleaning, significantly improving the continuity of the nickel salt solution filtration process, and reducing maintenance costs and operational intensity.

[0047] Furthermore, a mounting bracket 401 is fixedly installed on the support bracket 403, and a hydraulic power station 402 is fixedly installed on the mounting bracket 401. The hydraulic power station 402 is the power source of the filter press, and integrates a hydraulic pump, control valve group, oil tank and pipelines. After the nickel salt solution precision filtration device is started, the hydraulic power station 402 outputs high-pressure hydraulic oil to the filter press cylinder 104. The high-pressure oil pushes the piston rod of the cylinder 104 to extend and retract, completing the pressing and releasing action of the filter plate 107. When the filter plate 107 is pressed, a sealed filter chamber is formed. The material is pumped into the filter chamber to achieve solid-liquid separation. After the filtration process is completed, the hydraulic power station 402 depressurizes and returns oil, and the cylinder 104 pulls the filter plate 107 to release it. The filter cake falls off by its own weight for unloading. The working principle of this part is existing technology, which can be clearly understood by those skilled in the art, and will not be described in detail here.

[0048] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0049] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A precision filtration device for nickel salt solutions, comprising: The support bracket (403) and the lifting lug (106) are provided, wherein a filter plate (107) is fixedly mounted on the lifting lug (106), and a filter cloth (108) is mounted on the filter plate (107). The feature is that it further includes: The vibration structure (200) includes an upper base (201) fixedly disposed on the filter plate (107), a lower base (202) fixedly disposed on the filter plate (107) and located below the upper base (201), a lifting screw (203) slidably disposed on the upper base (201) and the lower base (202), a connecting top plate (204) fixedly disposed on the lifting screw (203), a first spring (203a) fixedly disposed between the connecting top plate (204) and the upper base (201), and a transmission assembly fixedly disposed on the connecting top plate (204). And the folding structure (300) includes a mounting groove (301) disposed on the upper base (201), a lifting seat (302) fixedly disposed on the mounting groove (301), a side vertical rail (303) fixedly disposed on the lifting seat (302), a telescopic arm (304) slidably disposed on the side vertical rail (303), and a shearing assembly fixedly disposed on the side vertical rail (303).

2. The precision filtration device for nickel salt solution according to claim 1, characterized in that, The lifting screw (203) is fixedly provided with a lower limit seat (2061) at one end extending below the lower base (202). A second spring (2062) is fixedly provided between the lower limit seat (2061) and the lower base (202). The telescopic arm (304) is fixedly provided on the lower limit seat (2061).

3. The precision filtration device for nickel salt solution according to claim 1, characterized in that, The transmission assembly includes a cross seat (2051) fixedly mounted on the connecting top plate (204) and a positioning rod (2052) slidably mounted on the cross seat (2051), with one end of the positioning rod (2052) fixedly mounted on the filter plate (107).

4. The precision filtration device for nickel salt solution according to claim 3, characterized in that, The horizontal seat (2051) is fixedly provided with a number of protrusions (2053) arranged in a linear array, the positioning rod (2052) is fixedly provided with an arc-shaped support plate (2054), and the filter cloth (108) is provided on the arc-shaped support plate (2054).

5. The precision filtration device for nickel salt solution according to claim 1, characterized in that, The side vertical rail (303) is provided with a limiting groove (3051), and a positioning block (3052) is slidably provided on the limiting groove (3051). One end of the positioning block (3052) is fixedly provided with a retaining piece (3053), and the other end of the positioning block (3052) is fixedly provided on the telescopic arm (304).

6. The precision filtration device for nickel salt solution according to claim 4, characterized in that, The shearing assembly includes a hinged support (3067) fixedly mounted on the filter plate (107), a fixed arm (3063) fixedly mounted on the hinged support (3067), and a hinged swing arm (3064) rotatably mounted on the hinged support (3067) and located on the side of the fixed arm (3063).

7. A precision filtration device for nickel salt solution according to claim 6, characterized in that, A hanging column (3066) is fixed on the fixed arm (3063) and the hinged swing arm (3064). The end of the fixed arm (3063) away from the hanging column (3066) is fixedly mounted on the side vertical rail (303). The end of the hinged swing arm (3064) away from the hanging column (3066) is provided with a guide groove (3065).

8. A precision filtration device for nickel salt solution according to claim 7, characterized in that, The hinged swing arm (3064) is provided with a guide groove (3065), the side vertical rail (303) is provided with a sliding groove (3061), and the telescopic arm (304) is fixedly provided with a guide post (3062). The guide post (3062) slides through the sliding groove (3061) and is slidably disposed in the guide groove (3065).

9. A precision filtration device for nickel salt solution according to claim 1, characterized in that, The hoisting side lug (106) is slidably mounted on the support bracket (403). A side slide rod (101) is fixedly mounted on the support bracket (403). Control boxes (101a) are fixedly mounted at both ends of the side slide rod (101). A pull plate trolley (103) is slidably mounted on the side slide rod (101).

10. A precision filtration device for nickel salt solution according to claim 9, characterized in that, A frame (102) is fixedly installed on the pull plate trolley (103), a hydraulic cylinder (104) is fixedly installed on the frame (102), a striking rod (105) is slidably installed on the hydraulic cylinder (104), a mounting bracket (401) is fixedly installed on the support bracket (403), and a hydraulic power station (402) is fixedly installed on the mounting bracket (401).

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