Low-temperature negative pressure filter press for sludge treatment

Abstract

The application discloses a low-temperature negative pressure filter press for sludge treatment, which comprises a base, a filter plate arranged on the base, a filter pressing driving mechanism arranged on the base and comprising a low-temperature negative pressure box, a driving pump and a pressing assembly, the pressing assembly being used for driving the filter plate to close to form a closed filter chamber, the driving pump being communicated with the low-temperature negative pressure box, the low-temperature negative pressure box being communicated with the filter chamber and being used for providing a low-temperature negative pressure environment while the pressing assembly is mechanically pressed, a translation and overturning mechanism arranged on the base, and a clamping unit arranged on an execution end of the translation and overturning mechanism, the clamping unit being capable of clamping the filter plate and enabling the filter plate to translate and overturn under the driving of the translation and overturning mechanism. The low-temperature negative pressure filter press combines mechanical filter pressing with low-temperature negative pressure to realize synchronous drying and efficiency improvement, adopts a helical groove direct rotation driving translation and overturning and a gear synchronous clamping to realize full-automatic and reliable sludge unloading.

Description

Technical Field

[0001] This invention relates to the field of sludge treatment technology, and in particular to a low-temperature negative pressure filter press for sludge treatment. Background Technology

[0002] Sludge has a high water content, large volume, and contains pathogens, heavy metals, and organic pollutants. If discharged directly without proper treatment, it will cause serious secondary pollution to the ecological environment. Traditional mechanical filter presses are unable to break down the colloidal structure of sludge and cannot meet the requirements for subsequent treatment. Although high-temperature thermal drying can deeply dehydrate, it has high energy consumption, is prone to volatile odorous gases, and poses a risk of dust explosion. Although low-temperature negative pressure drying technology can lower the boiling point and is safe and energy-saving, existing equipment often separates the filter press and drying processes, resulting in high material handling costs, serious heat loss, and low overall efficiency. In addition, during the sludge unloading process of the filter press, the adsorption force between the sludge cake and the filter plate is large. The lack of an automated sludge unloading mechanism makes it difficult to achieve a smooth movement and large-scale overturning of the filter plate, resulting in incomplete sludge unloading and difficulty in cleaning the filter cloth. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is that traditional filter press equipment is inefficient due to the separation of filter press and drying processes, lacks an automated sludge unloading mechanism, and thus has difficulties in unloading sludge and inconvenience in cleaning filter cloth.

[0004] The above-mentioned technical problems are solved by the following technical solution: This invention proposes a low-temperature negative pressure filter press for sludge treatment, comprising: A base on which a filter plate is provided; A filter press driving mechanism, mounted on the base, includes a low-temperature negative pressure box, a drive pump, and a pressing assembly. The pressing assembly is used to push the filter plate to close to form a sealed filter chamber. The drive pump is connected to the low-temperature negative pressure box, which is connected to the filter chamber. It is used to provide a low-temperature negative pressure environment while the pressing assembly mechanically presses the filter plate. A translation and flipping mechanism is provided on the base; A clamping unit is disposed at the execution end of the translation and flipping mechanism. The clamping unit can clamp the filter plate and, driven by the translation and flipping mechanism, cause the filter plate to translate and flip.

[0005] In a preferred embodiment of the low-temperature negative pressure filter press for sludge treatment described in this invention: the translational flipping mechanism includes a top plate and a support plate. The upper end of the support plate is provided with a top plate, and the lower end of the support plate is provided with a threaded seat for translational transmission. A lifting platform is provided on the threaded seat, and a flipping unit is provided on the lifting platform. The flipping unit includes a flipping seat, a first limiting block, and a linkage mounting seat. A third pushing member is provided between the linkage mounting seat and the lifting platform. The third pushing member is used to drive the linkage mounting seat and the flipping seat to move relative to the lifting platform. A first limiting block is provided at the end of the flipping seat away from the support plate. A guide seat is provided between the flipping seat and the support plate. The guide seat is provided with a flipping guide groove. A drive motor and a drive threaded rod are provided on the base. The drive threaded rod is threadedly connected to the threaded seat to drive the translational flipping mechanism to translate.

[0006] In a preferred embodiment of the low-temperature negative pressure filter press for sludge treatment described in this invention: a connecting sleeve is provided inside the linkage mounting base, a linkage sleeve guide block is fixed inside the connecting sleeve, a linkage push rod is slidably connected inside the connecting sleeve, a spiral groove is provided on the linkage push rod, the linkage sleeve guide block extends into the spiral groove and slides therewith, and the linkage push rod is axially slidably connected to the linkage mounting base and circumferentially limited.

[0007] In a preferred embodiment of the low-temperature negative pressure filter press for sludge treatment described in this invention: a second pushing member is provided on the tilting seat, and the output end of the second pushing member is hinged to the first limiting block through a driving connecting rod to drive the first limiting block to translate relative to the tilting seat. A guide connecting rod is also provided between the first limiting block and the tilting seat. The guide connecting rod is arranged parallel to the second pushing member, and both ends of the guide connecting rod are respectively hinged to the tilting seat and the first limiting block to form a parallel guiding structure.

[0008] In a preferred embodiment of the low-temperature negative pressure filter press for sludge treatment described in this invention: a filter plate guide block is provided on the filter plate, a first positioning groove is provided on the outer side of the filter plate guide block, a second positioning groove is provided in the first limiting block, and positioning blocks are arranged at equal intervals in the second positioning groove. When the first limiting block is connected to the filter plate guide block, the positioning block extends into the first positioning groove and engages with it, so that the translation and flipping mechanism can detachably clamp and fix the filter plate.

[0009] In a preferred embodiment of the low-temperature negative pressure filter press for sludge treatment described in this invention: a roller is provided at the lower end of the support plate, the roller is used to roll and cooperate with the base to support translation; a first pushing member is provided on the top plate, and a cleaning head is provided at the output end of the first pushing member for driving the cleaning head to move and clean the filter plate; a spray nozzle and a cleaning pipeline communicating with the spray nozzle are provided on the cleaning head; a translational mounting bracket is provided on the outside of the support plate; a support bracket is provided between the translational mounting bracket and the support plate; an extension bracket is provided on the translational mounting bracket; and the clamping unit is provided on the extension bracket.

[0010] In a preferred embodiment of the low-temperature negative pressure filter press for sludge treatment described in this invention: the tilting guide groove includes a receiving section, a first tilting section and a second tilting section. When the second limiting block slides into the receiving section, the tilting seat remains vertical. When the second limiting block slides from the receiving section to the first tilting section, the tilting seat tilts to one side. When the second limiting block slides from the receiving section to the second tilting section, the tilting seat tilts to the other side.

[0011] In a preferred embodiment of the low-temperature negative pressure filter press for sludge treatment described in this invention: the clamping unit includes a clamping head and a wedge mounting base. The wedge mounting base is fixed to the housing of the clamping unit. The clamping head is slidably disposed within the clamping unit, and an elastic element is provided between the clamping head and the housing. A linkage groove is provided inside the clamping head. A fourth pushing element is provided on the wedge mounting base. A linkage wedge is provided at the output end of the fourth pushing element. A guide shaft is provided between the linkage wedge and the wedge mounting base. The linkage wedge slides in cooperation with the wedge surface of the linkage groove.

[0012] In a preferred embodiment of the low-temperature negative pressure filter press for sludge treatment described in this invention: a connecting rod assembly is provided at the lower end of the clamping unit. The connecting rod assembly includes a first connecting plate and a second connecting plate arranged alternately along the width direction. A first connecting rod and a second connecting rod are hinged between the first connecting plate and an adjacent second connecting plate. A third connecting rod and a fourth connecting rod are hinged between the second connecting plate and another adjacent first connecting plate.

[0013] In a preferred embodiment of the low-temperature negative pressure filter press for sludge treatment described in this invention: a clamping guide block is provided on the first connecting plate, a fifth pushing member is provided on one side of the first connecting plate, a pushing block is provided at the output end of the fifth pushing member, the pushing block is connected to the first connecting plate, a guide groove plate is provided on the pushing block, and the guide groove plate is slidably connected to the clamping guide block.

[0014] The beneficial effects of this invention are as follows: while forming a sealed filter chamber by mechanically pressing the filter chamber with the pressing component, the low-temperature negative pressure box evacuates the filter chamber to form a low-temperature negative pressure environment. Under the dual action of mechanical extrusion and negative pressure suction, rapid dehydration is achieved, realizing the simultaneous operation of pressure filtration and low-temperature drying, greatly shortening the dehydration cycle and effectively reducing the moisture content of the filter cake. The spiral groove mechanism accurately converts the linear motion of a single pusher into the rotational motion of the flipping seat. Combined with the three-section guide groove, it enables the filter plate to be moved and pulled out horizontally and flipped in both directions. It relies on its own weight to smoothly remove mud and prevents mud from sticking to one side. At the same time, the clamping unit achieves a firm grip through the positioning block snap-fit, and achieves flexible release by combining wedge surface drive and elastic reset. The parallelogram linkage mechanism with gear synchronization ensures that the clamping opening and closing is accurate and aligned without jamming. The cleaning spray assembly is integrated into the translation and flipping mechanism. During the process of the filter plate being translated, pulled away and flipped, the first pusher synchronously drives the cleaning head to automatically spray and wash the filter cloth, realizing the simultaneous operation of desludge removal and cleaning. This effectively prevents the filter cloth pores from becoming clogged, eliminates the tediousness of manual cleaning, and ensures the continuous and efficient operation of the equipment. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Wherein: Figure 1 A schematic diagram of the overall structure of the present invention is shown; Figure 2 A schematic diagram of the flip-state structure of the present invention is shown. Figure 1 ; Figure 3 A schematic diagram of the flip-state structure of the present invention is shown. Figure 2 ; Figure 4 A schematic diagram of the overall structure of the translation and flipping mechanism of the present invention is shown; Figure 5 An enlarged structural schematic diagram of point A in this invention is shown; Figure 6 A schematic diagram of the overall structure of the flipping unit and the extension unit of the present invention is shown; Figure 7 An enlarged structural schematic diagram of point B in the present invention is shown; Figure 8 A schematic diagram of the overall structure of the extension unit of the present invention is shown; Figure 9 A schematic diagram of the overall structure of the clamping unit of the present invention is shown. Figure 1 ; Figure 10 A schematic diagram of the overall structure of the filter plate of the present invention is shown; Figure 11 An enlarged structural schematic diagram of point C in the present invention is shown; Figure 12 A schematic diagram of the overall structure of the flipping unit of the present invention is shown. Figure 1 ; Figure 13 A schematic diagram of the overall structure of the flipping unit of the present invention is shown. Figure 2 ; Figure 14 A cross-sectional structural schematic diagram of the linkage push rod of the present invention is shown. Detailed Implementation

[0016] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0017] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0018] refer to Figures 1 to 3 A filter plate 101 is mounted on the base 100, and a protective flap 102 is also mounted on the base 100. A sludge collection trough 103 is located below the protective flap 102. A drive motor 104 is mounted at the lower end of the base 100, and a drive threaded rod 105 is mounted at the output end of the drive motor 104. The drive threaded rod 105 is threadedly connected to a threaded seat 202a. A guide rail 106 is also mounted on the base 100. A filter press pushing mechanism 400 is mounted on the base 100 and includes a low-temperature negative pressure box 401, a drive pump 402, and a pressing assembly. 403, the pressing assembly 403 is used to push the filter plate 101 to close to form a sealed filter chamber. The drive pump 402 is connected to the low temperature negative pressure box 401. The low temperature negative pressure box 401 is connected to the filter chamber and is used to provide a low temperature negative pressure environment while the pressing assembly 403 mechanically presses. The translation and flipping mechanism 200 is set on the base 100. The clamping unit 300 is set at the execution end of the translation and flipping mechanism 200. The clamping unit 300 can clamp the filter plate 101 and make the filter plate 101 translate and flip under the drive of the translation and flipping mechanism 200.

[0019] refer to Figure 4The translation and tilting mechanism 200 includes a top plate 201 and a support plate 202. The top plate 201 is provided on the upper end of the support plate 202, and a threaded seat 202a is provided on the lower end of the support plate 202. A lifting platform 202f is provided on the threaded seat 202a, and a tilting unit is provided on the lifting platform 202f. The tilting unit includes a tilting seat 207, a first limiting block 208, and a linkage mounting seat 209. A third pushing member 210 is provided between the linkage mounting seat 209 and the lifting platform 202f. The rotating base 207 is used to drive the linkage mounting base 209 and the flipping base 207 to move relative to the lifting platform 202f. The flipping base 207 is provided with a first limiting block 208 at the end away from the support plate 202. A guide seat 205 is provided between the flipping base 207 and the support plate 202. The guide seat 205 is provided with a flipping guide groove 206. The flipping base 207 is provided with a mating part that extends into the flipping guide groove 206. When the flipping base 207 moves with the linkage mounting base 209, the mating part slides along the flipping guide groove 206 to achieve flipping and limiting.

[0020] refer to Figure 5 The clamping unit 300 includes a clamping head 301 and a wedge mounting base 302. The wedge mounting base 302 is fixed to the housing of the clamping unit 300. The clamping head 301 is slidably disposed within the clamping unit 300. An elastic element 301b is provided between the clamping head 301 and the housing of the clamping unit 300. A linkage groove 301a is formed inside the clamping head 301. A fourth pushing element 303 is provided on the wedge mounting base 302. A linkage wedge 304 is provided at the output end of the fourth pushing element 303. The linkage wedge 304 interacts with the wedge... A guide shaft 304a is provided between the block mounting bases 302. The linkage wedge 304 slides with the linkage groove 301a. The fourth pusher 303 is used to drive the linkage wedge 304 to move along the linkage groove 301a. The linkage wedge 304 and the linkage groove 301a drive the clamping head 301 to overcome the elastic force of the elastic member 301b and retract to release the clamping of the filter plate 101. When the fourth pusher 303 retracts, the elastic member 301b pushes the clamping head 301 to extend and reset to clamp the filter plate 101.

[0021] refer to Figure 4 and Figure 6The lower end of the support plate 202 is provided with a roller 202b, which is used to roll with the base 100 to support the translation and flipping mechanism 200 to translate. The top plate 201 is provided with a first pusher 203, and the output end of the first pusher 203 is provided with a cleaning head 204. The first pusher 203 is used to drive the cleaning head 204 to move to clean the filter plate. The cleaning head 204 is provided with at least one set of spray nozzles 204a and a cleaning pipe 204b connected to the spray nozzles 204a. The outside of the support plate 202 is provided with a translation mounting bracket 202c. A support bracket 202d is provided between the translation mounting bracket 202c and the support plate 202. An extension bracket 202e is provided on the translation mounting bracket 202c. The clamping unit 300 is provided on the extension bracket 202e.

[0022] refer to Figure 7 , Figure 10 and Figure 11 The filter plate 101 has a liquid inlet 101a and a liquid collection port 101b. The filter plate 101 is provided with a filter plate guide block 101c. A first positioning groove 101d is opened on the outer side of the filter plate guide block 101c. A filter plate guide groove 101e is opened at the lower end of the filter plate guide block 101c. The filter plate 101 is connected to the guide rail 106 through the filter plate guide groove 101e. A second positioning groove 208a is opened in the first limiting block 208. At least one set of positioning blocks 208b are arranged at equal intervals in the second positioning groove 208a. When the first limiting block 208 is connected to the filter plate guide block 101c, the positioning block 208b can extend into the first positioning groove 101d and engage with it, so that the translation and flipping mechanism 200 can detachably clamp and fix the filter plate 101.

[0023] refer to Figure 8 The flip guide groove 206 includes a storage section 206a, a first flip section 206b, and a second flip section 206c. When the second limiting block 209c slides into the storage section 206a, the flip seat 207 remains vertical. When the second limiting block 209c slides from the storage section 206a to the first flip section 206b, the flip seat 207 flips to one side. When the second limiting block 209c slides from the storage section 206a to the second flip section 206c, the flip seat 207 flips to the other side. The clamping unit 300 has a linkage assembly at its lower end. The linkage assembly includes a first connecting plate 305 and a second connecting plate 306 arranged alternately along the width direction. A first connecting rod 307 and a second connecting rod 308 are provided between one of the first connecting plates 305 and an adjacent second connecting plate 306. The two ends of the first connecting rod 307 and the second connecting rod 308 are hinged to the first connecting plate 305 and the second connecting plate 306, respectively. A third connecting rod 309 and a fourth connecting rod 310 are provided between the second connecting plate 306 and another adjacent first connecting plate 305. The two ends of the third connecting rod 309 and the fourth connecting rod 310 are hinged to the second connecting plate 306 and another first connecting plate 305, respectively. The first connecting rod 307 and the fourth connecting rod 310 intersect. At one hinge point of the second connecting plate 306, the ends of the first connecting rod 307 and the fourth connecting rod 310 are respectively provided with a first gear 307a and a fourth gear 310a that mesh with each other. The second connecting rod 308 and the third connecting rod 309 meet at another hinge point of the second connecting plate 306, and the ends of the second connecting rod 308 and the third connecting rod 309 are respectively provided with a second gear 308a and a third gear 309a that mesh with each other. The first connecting rod 307 and the third connecting rod 309 are parallel and of equal length, and the second connecting rod 308 and the fourth connecting rod 310 are parallel and of equal length, so as to form at least one parallelogram connecting rod mechanism when the connecting rod assembly is translated and unfolded, and the clamping unit 300 is synchronously driven to translate and unfold or retract in the width direction through the meshing of the gears. The first connecting plate 305 is provided with a clamping guide block 314, and a fifth pusher 311 is provided on one side of the first connecting plate 305. A pusher block 312 is provided on the output end of the fifth pusher 311, and a guide groove plate 313 is provided on the pusher block 312. The guide groove plate 313 is slidably connected to the clamping guide block 314 so that the pusher block 312 moves along the clamping guide block 314 under the drive of the fifth pusher 311.

[0024] refer to Figures 12 to 14The linkage mounting base 209 contains a connecting sleeve 209a, and the connecting sleeve 209a contains a linkage sleeve guide block 209a-1. A linkage push rod 209b is slidably connected within the connecting sleeve 209a. The linkage push rod 209b has a spiral groove 209b-1. The connecting sleeve guide block 209a-1 extends into and slides within the spiral groove 209b-1, causing the linkage push rod 209b to rotate during linear movement, thus rotating the flipping base 207. One end of the linkage push rod 209b is equipped with a drive shaft 209d, and the drive shaft 209d is equipped with... The second limiting block 209c extends into the flipping guide groove 206 and slides therewith to limit and guide the flipping trajectory of the transmission shaft 209d. The linkage push rod 209b is axially slidably connected to the linkage mounting base 209 and circumferentially limited. When the linkage mounting base 209 is driven to move linearly by the third pusher 210, it drives the linkage push rod 209b to move linearly synchronously. The connecting sleeve guide block 209a-1 slides with the spiral groove 209b-1 to convert the linear movement into the rotational motion of the linkage push rod 209b, so as to drive the flipping base 207 to flip. The flip base 207 is provided with a second pusher 207a. The output end of the second pusher 207a is connected to the first limit block 208 through a drive link 207b to drive the first limit block 208 to move relative to the flip base 207. A guide link 207c is also provided between the first limit block 208 and the flip base 207. The guide link 207c is arranged parallel to the second pusher 207a. The two ends of the guide link 207c are respectively connected to the flip base 207 and the first limit block 208.

[0025] When in use, after the sludge enters the filter chamber, the pressing component 403 of the filter press driving mechanism 400 pushes the filter plate 101 to close and press, forming a sealed filter chamber. At this time, the drive pump 402 and the low temperature negative pressure box 401 are started to evacuate the sealed filter chamber, so that it is in a low temperature negative pressure environment while being mechanically squeezed under high pressure. The combined effect of mechanical pressing and negative pressure suction greatly reduces the moisture of the filter cake, realizing the simultaneous and efficient operation of filter press and low temperature drying. After dewatering, the pressing component 403 loosens the filter plate, and the drive motor 104 on the base 100 drives the threaded rod 105 to rotate, which cooperates with the threaded seat 202a at the lower end of the support plate 202 of the translation and flipping mechanism 200, driving the entire mechanism to translate along the guide rail 106 to the target filter plate. At this time, the clamping unit 300 starts to operate: the fifth pusher 311 drives the pusher block 312, the guide groove plate 313 slides along the clamping guide block 314, and smoothly transmits the power to the first connecting plate 305, forcing the parallelogram linkage assembly below to translate and unfold in the width direction, adjusting the clamping width to align with the filter plate. At the same time, the fourth pusher 303 retracts, the elastic member 301b pushes the clamping head 301 to extend and clamp the filter plate, and the second pusher 207a on the flipping seat 207 drives the first limiting block 208 to translate, so that the positioning block 208b on it accurately extends into the first positioning groove 101d of the filter plate guide block 101c and engages, achieving rigid locking with the filter plate. When the filter plate enters the flipping process, the third pusher 210 drives the linkage mounting base 209 to move linearly. Since the linkage push rod 209b slides axially with the mounting base and is circumferentially limited, the push rod is forced to move linearly synchronously. At this time, the linkage sleeve guide block 209a-1 fixed in the connecting sleeve 209a slides in the spiral groove 209b-1 of the push rod, forcibly converting the linear motion into the rotational motion of the linkage push rod 209b, which drives the flipping base 207 to flip. During this process, the second limiting block 209c on the transmission shaft 209d slides and limits along the flipping guide groove 206: when it is in the receiving section, the flipping base remains vertical. When it slides into the first or second flipping section, the flipping base flips to the corresponding side, realizing a large-scale left and right flipping of the filter plate. The mud cake falls off smoothly by its own weight, preventing mud from sticking to one side. After the filter plate is moved and flipped to unload sludge, the first pusher 203 on the top plate 201 drives the cleaning head 204 to move closer to the filter cloth and automatically high-pressure wash the filter cloth through the spray nozzle 204a. After the sludge unloading and cleaning are completed, when the filter plate needs to be released, the fourth pusher 303 drives the linkage wedge 304 to move forward along the guide shaft. The wedge surface presses against the linkage groove 301a, forcing the clamping head 301 to overcome the elastic force of the elastic element 301b and retract, releasing the filter plate. Then the linkage mechanism retracts, the translation and flipping mechanism resets, and waits for the next working cycle.

[0026] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A low-temperature negative pressure filter press for sludge treatment, characterized in that: include: A base on which a filter plate is provided; A filter press driving mechanism, mounted on the base, includes a low-temperature negative pressure box, a drive pump, and a pressing assembly. The pressing assembly is used to push the filter plate to close to form a sealed filter chamber. The drive pump is connected to the low-temperature negative pressure box, which is connected to the filter chamber. It is used to provide a low-temperature negative pressure environment while the pressing assembly mechanically presses the filter plate. A translation and flipping mechanism is provided on the base; A clamping unit is disposed at the execution end of the translation and flipping mechanism. The clamping unit can clamp the filter plate and, driven by the translation and flipping mechanism, cause the filter plate to translate and flip.

2. The low-temperature negative pressure filter press for sludge treatment according to claim 1, characterized in that: The translation and flipping mechanism includes a top plate and a support plate. The support plate has a top plate at its upper end and a threaded seat for translational transmission at its lower end. A lifting platform is mounted on the threaded seat, and a flipping unit is mounted on the lifting platform. The flipping unit includes a flipping seat, a first limiting block, and a linkage mounting seat. A third pushing member is provided between the linkage mounting seat and the lifting platform. The third pushing member is used to drive the linkage mounting seat and the flipping seat to move relative to the lifting platform. A first limiting block is provided at the end of the flipping seat away from the support plate. A guide seat is provided between the flipping seat and the support plate. The guide seat has a flipping guide groove. A drive motor and a drive threaded rod are mounted on the base. The drive threaded rod is threadedly connected to the threaded seat to drive the translation and flipping mechanism to translate.

3. The low-temperature negative pressure filter press for sludge treatment according to claim 2, characterized in that: The linkage mounting base is provided with a connecting sleeve, and a linkage sleeve guide block is fixed inside the connecting sleeve. A linkage push rod is slidably connected inside the connecting sleeve. A spiral groove is opened on the linkage push rod. The linkage sleeve guide block extends into the spiral groove and slides with it. The linkage push rod is axially slidably connected to the linkage mounting base and circumferentially limited.

4. The low-temperature negative pressure filter press for sludge treatment according to claim 3, characterized in that: The flipping seat is provided with a second pushing member. The output end of the second pushing member is hinged to the first limiting block through a driving link to drive the first limiting block to translate relative to the flipping seat. A guide link is also provided between the first limiting block and the flipping seat. The guide link is arranged parallel to the second pushing member, and both ends of the guide link are respectively hinged to the flipping seat and the first limiting block to form a parallel guide structure.

5. The low-temperature negative pressure filter press for sludge treatment according to claim 4, characterized in that: The filter plate is provided with a filter plate guide block. A first positioning groove is opened on the outer side of the filter plate guide block. A second positioning groove is opened in the first limiting block. Positioning blocks are arranged at equal intervals in the second positioning groove. When the first limiting block is connected to the filter plate guide block, the positioning block extends into the first positioning groove and engages with it, so that the translation and flipping mechanism can detachably clamp and fix the filter plate.

6. The low-temperature negative pressure filter press for sludge treatment according to claim 2, characterized in that: The lower end of the support plate is provided with rollers, which are used to roll and cooperate with the base to support translation. The top plate is provided with a first pushing member, and the output end of the first pushing member is provided with a cleaning head, which is used to drive the cleaning head to move and clean the filter plate. The cleaning head is provided with a spray nozzle and a cleaning pipe connected to the spray nozzle. A translation mounting bracket is provided on the outside of the support plate. A support bracket is provided between the translation mounting bracket and the support plate. An extension bracket is provided on the translation mounting bracket. The clamping unit is provided on the extension bracket.

7. The low-temperature negative pressure filter press for sludge treatment according to claim 3, characterized in that: The flipping guide groove includes a storage section, a first flipping section, and a second flipping section. When the second limiting block slides into the storage section, the flipping seat remains in a vertical state. When the second limiting block slides from the storage section to the first flipping section, the flipping seat flips to one side. When the second limiting block slides from the storage section to the second flipping section, the flipping seat flips to the other side.

8. The low-temperature negative pressure filter press for sludge treatment according to claim 6, characterized in that: The clamping unit includes a clamping head and a wedge mounting base. The wedge mounting base is fixed to the housing of the clamping unit. The clamping head is slidably disposed within the clamping unit, and an elastic element is provided between the clamping head and the housing. A linkage groove is formed inside the clamping head. A fourth pushing element is provided on the wedge mounting base. A linkage wedge is provided at the output end of the fourth pushing element. A guide shaft is provided between the linkage wedge and the wedge mounting base. The linkage wedge slides in cooperation with the wedge surface of the linkage groove.

9. The low-temperature negative pressure filter press for sludge treatment according to claim 8, characterized in that: The lower end of the clamping unit is provided with a linkage assembly, which includes a first connecting plate and a second connecting plate arranged alternately along the width direction. The first connecting plate and the adjacent second connecting plate are hinged with a first link and a second link, and the second connecting plate and another adjacent first connecting plate are hinged with a third link and a fourth link.

10. The low-temperature negative pressure filter press for sludge treatment according to claim 9, characterized in that: The first connecting plate is provided with a clamping guide block, and a fifth pushing member is provided on one side of the first connecting plate. The output end of the fifth pushing member is provided with a pushing block. The pushing block is connected to the first connecting plate. The pushing block is provided with a guide groove plate, and the guide groove plate is slidably connected to the clamping guide block.

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