A plate-and-frame filter press for production of liquid polyaluminum chloride

Abstract

The present application relates to the technical field of plate-and-frame filter press, and discloses a plate-and-frame filter press for liquid polyaluminum chloride production, which comprises a filter press body, plate-and-frame filters installed on the filter press body, and a distance adjusting unit arranged on both sides of the top of the filter press body, wherein the distance adjusting unit comprises a synchronous belt and a fixed gear wheel matched with each other, the fixed gear wheel is fixedly installed on both sides of the plate-and-frame filter, the synchronous belt drives the plate-and-frame filter to move by cooperating with the fixed gear wheel, and the distance adjusting unit further comprises a control mechanism, wherein the control mechanism comprises a rotating member, clutches are arranged at both ends of the rotating member, and a transmission mechanism is arranged between the clutches and the synchronous belt. The distance adjusting unit is arranged to adjust the distance, the plate-and-frame filter moves by meshing of the synchronous belt and the fixed gear wheel, and the plate-and-frame filters are scraped and cleaned by the cleaning unit, so that the problem that the plate-and-frame filters of the existing plate-and-frame filter press are not easy to clean is effectively solved.

Description

Technical Field

[0001] This invention belongs to the field of plate and frame filter press technology, and more specifically, relates to a plate and frame filter press for the production of liquid polyaluminum chloride. Background Technology

[0002] Filter presses are widely used in industries such as chemical, pharmaceutical, metallurgy, dye, food, brewing, ceramics, and environmental protection, and are essential equipment for achieving solid-liquid phase separation. Plate filter presses are widely used due to their large filtration area and high flow rate. The structure of a plate filter press includes a support frame with a head plate, a pressure plate, multiple filter plates, and a tail plate. Filter cloth is covered on both sides of the filter plates, and a pressing device presses the filter plates and the pressure plate together to form the filter chamber.

[0003] Chinese patent CN211383967U discloses a plate and frame filter press. During the compression filtration process, the far end of the main plate is tilted upwards. Most of the liquid is discharged from the drain pipes on both sides of the filter plate into the liquid receiving tank, while the remaining liquid falls onto the main plate and, along the tilted main plate, enters the U-shaped trough through the transition plate. The collected liquid is directly discharged through the drain port at the bottom of the U-shaped trough. After the liquid is drained, the motor drives the main shaft to rotate the tilting plate body downwards, the oil cylinder resets, the pressing plate loosens the filter plate, and the drive chain drives the automatic plate pulling trolley to separate the filter plates. The solid material between the filter plates falls onto the belt of the belt conveyor, and is promptly transported away as the belt rotates. This plate and frame filter press can comprehensively collect the separated liquid material, automatically pull apart the filter plates, and promptly transport away the separated solid material, greatly improving work efficiency.

[0004] However, this technical solution still has at least the following drawbacks: relying on a drive chain to drive an automatic plate-pulling trolley to separate the filter plates requires automatic control of the trolley, and solid materials between the pressed filter plates may stick to the plates and cannot fall off on their own. Therefore, the time for the automatic plate-pulling trolley to separate the filter plates needs to be controlled to allow sufficient time for manual cleaning, which increases the technical cost. In view of this, the present invention is proposed. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a plate and frame filter press for the production of liquid polyaluminum chloride. The press uses an adjustable spacing unit for spacing adjustment, relying on the meshing of a synchronous belt and a fixed gear to move the plates and frames. After reaching the correct position, the synchronous belt moves due to the reaction force, causing the adjustable spacing unit to move the cleaning unit to the middle position of the adjustable spacing interval. The cleaning unit then scrapes and cleans the spaces between the plates and frames, effectively solving the problem of difficulty in cleaning the spaces between the plates and frames in existing plate and frame filter presses.

[0006] The technical solution adopted by this invention to solve its technical problem is:

[0007] A plate and frame filter press for the production of liquid polyaluminum chloride includes a filter press body and a plate and frame mounted on the filter press body, and further includes:

[0008] The adjustable distance unit is located on both sides of the top of the filter press body. The adjustable distance unit includes a matching synchronous belt and a fixed gear. The fixed gear is fixedly installed on both sides of the plate frame. The synchronous belt drives the plate frame to move by cooperating with the fixed gear. The adjustable distance unit also includes a control mechanism. The control mechanism includes a rotating component. Clutches are provided at both ends of the rotating component. A transmission mechanism is provided between the clutch and the synchronous belt. The power transmission between the rotating component and the synchronous belt is controlled by controlling the engagement state of the clutch.

[0009] A cleaning unit is located on top of the filter press body, and the cleaning unit is used to clean the plates and frames.

[0010] In a preferred embodiment of the present invention, the adjusting unit is configured with an adjusting interval, wherein the adjusting interval is the interval between the two plate frames after adjustment, and the effective meshing length of the synchronous belt satisfies that the synchronous belt meshes with the adjacent fixed gears on both sides of the adjusting interval, and does not mesh with any three fixed gears including the adjusting interval.

[0011] In a preferred embodiment of the present invention, the transmission mechanism includes a mounting frame, a support shaft slidably connected to the bottom of the mounting frame, rollers rotatably mounted at both ends of the mounting frame, the rollers meshing with the inner wall of the timing belt, a pad fixedly mounted on one side of the mounting frame, the pad supporting the timing belt to maintain its shape, a support member fixedly mounted on one side of the mounting frame, a rotating shaft rotatably mounted on the support member, and a bevel gear set installed between the rotating shaft and the rollers.

[0012] In a preferred embodiment of the present invention, one end of the rotating component and the clutch is movably sleeved on the rotating shaft, the other end of the clutch is fixedly installed on the rotating shaft, positioning rods are fixedly installed at both ends of the rotating component, the movable end of the clutch is movably sleeved on the positioning rod, a first spring is movably sleeved on the positioning rod, a groove is also provided on the rotating component, a connecting rod is fixedly installed at the movable end of the clutch, the connecting rod passes through the end of the rotating component and extends into the groove, and a connecting ring is fixedly installed at one end of the connecting rod.

[0013] In a preferred embodiment of the present invention, the support member is provided with a moving mechanism, the moving mechanism including a slide rod fixedly connected to the support member, a connecting plate movably sleeved on the slide rod, the connecting plate being rotatably connected to a connecting ring, a guide block being fixedly installed on one side of the connecting plate, and a guide protrusion being provided on one side of the guide block. The guide block is moved laterally by the lifting and lowering movement of the guide protrusion to control the engagement state of the clutch.

[0014] In a preferred embodiment of the present invention, the support member is further provided with a lifting mechanism. The lifting mechanism includes a pull rod movably inserted into the support member, a pressure plate fixedly installed at the bottom of the pull rod, and a protrusion formed at the bottom of the pressure plate. The lifting mechanism also includes a locking plate with a locking groove that matches the protrusion. A support plate is fixedly installed at the top of the pull rod, and a magnetic attraction structure is provided at the top of the support plate. The magnetic attraction structure drives the pull rod to rise, thereby disengaging the protrusion from the locking groove.

[0015] In a preferred embodiment of the present invention, the mounting bracket is provided with a locking mechanism, the locking mechanism including a fixing plate fixedly mounted on the mounting bracket, a positioning sleeve fixedly mounted on the fixing plate, a rod movably inserted into the positioning sleeve, a brake plate fixedly mounted at the bottom of the rod, the brake plate cooperating with the support shaft, and the two being kept relatively fixed by the mutual pressing of the brake plate and the support shaft.

[0016] In a preferred embodiment of the present invention, a first pressure rod is fixedly installed on the top of the insertion rod, and the locking mechanism further includes a rotating frame rotatably installed on the mounting frame. The rotating frame is adapted to the first pressure rod, a second pressure rod is fixedly installed on the rotating frame, and a guide rod is fixedly installed at one end of the second pressure rod. A third pressure rod is fixedly installed at one end of the fixed gear, and the guide rod and the second pressure rod are driven to descend by the third pressure rod.

[0017] In a preferred embodiment of the present invention, the cleaning unit includes a support block fixedly installed on the top of the support member and the mounting frame, and a slide rail is slidably connected to the support block. A gantry frame is fixedly installed on the top of the support block, and a cleaning mechanism is provided at the bottom of the gantry frame. When the protrusion and the slot cooperate with each other, the cleaning mechanism is in the middle position of the adjustment interval.

[0018] In a preferred embodiment of the present invention, the cleaning mechanism includes a lift fixedly installed on the top of the gantry frame, a lifting plate fixedly installed at the bottom of the lift, trusses provided at both ends of the lifting plate, a cleaning component provided on one side of the truss, the cleaning component including a first scraper, and a second scraper rotatably installed at both ends of the first scraper, the first scraper being fixedly connected to the truss.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] This invention uses an adjustable spacing unit to adjust the spacing. The plate and frame are moved by the meshing of the synchronous belt and the fixed gear. After the plate and frame are in place, the synchronous belt is moved by the reaction force, so that the adjustable spacing unit moves the cleaning unit to the middle position of the adjustable spacing interval. The cleaning unit scrapes and cleans the space between the plates and frames, effectively solving the problem of difficult cleaning between the plates and frames in existing plate and frame filter presses. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a plate and frame filter press for the production of liquid polyaluminum chloride according to the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the adjusting unit of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the hydraulic cylinder of the present invention;

[0024] Figure 4 For the present invention Figure 2 Schematic diagram of the structure at point A in the middle;

[0025] Figure 5 This is a schematic diagram of the slide rail structure of the present invention;

[0026] Figure 6 This is a schematic diagram of the overall structure of the control mechanism of the present invention;

[0027] Figure 7 This is a schematic diagram of the structure at the transmission tooth groove of the present invention;

[0028] Figure 8 This is a schematic diagram of the separation structure at the clutch of the present invention;

[0029] Figure 9 This is a schematic diagram of the structure of the support component of the present invention;

[0030] Figure 10 This is a schematic diagram of the structure of the brake plate of the present invention;

[0031] Figure 11 This is a schematic diagram of the fixed gear and synchronous belt meshing state structure of the present invention;

[0032] Figure 12 This is a schematic diagram of the synchronous belt and the rear fixed gear meshing structure of the present invention;

[0033] Figure 13 This is a schematic diagram of the synchronous belt meshing with two fixed gears according to the present invention;

[0034] Figure 14 This is a schematic diagram of the synchronous belt and the front fixed gear meshing structure of the present invention;

[0035] Figure 15 This is a schematic diagram of the structure at the second pressure bar of the present invention;

[0036] Figure 16 This is a schematic diagram of the structure at the gantry of the present invention;

[0037] Figure 17 This is a schematic diagram of the structure of the lifting plate of the present invention;

[0038] Figure 18 This is a schematic diagram of the structure of the electric cylinder of the present invention;

[0039] Figure 19 This is a schematic diagram of the rotating frame structure of the present invention.

[0040] Figure label:

[0041] 100. Filter press body; 101. Plate and frame; 102. Hydraulic cylinder; 103. Base plate; 104. First power source; 105. Drive shaft; 106. Drive sleeve; 107. Drive gear; 108. Support component; 109. Rotating shaft; 110. Clutch; 111. Connecting rod; 112. Connecting ring; 113. Rotating component; 114. Drive gear groove; 115. Positioning rod; 116. First spring; 117. Connecting plate; 118. Guide block; 119. Slide rod; 120. Guide protrusion; 121. Pressure plate; 122. Protrusion; 123. Clamping plate; 124. Clamping groove; 125. Pull rod; 126. Second spring; 127. Support plate; 128. Magnetic plate; 129. Electromagnet;

[0042] 200. Mounting bracket; 201. Roller; 202. Bevel gear set; 203. Synchronous belt; 204. Pad; 205. Support shaft; 206. Fixing plate; 207. Positioning sleeve; 208. Insert rod; 209. Third spring; 210. Brake plate; 211. First pressure rod; 212. Rotating frame; 213. Second pressure rod; 214. Guide rod; 215. Fixed gear; 216. Third pressure rod;

[0043] 300. Support block; 301. Slide rail; 302. Gantry frame; 303. Elevator; 304. Lifting plate; 305. Truss; 306. First scraper; 307. Second scraper; 308. Second power source; 309. Electric cylinder. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0045] Example 1

[0046] like Figures 1 to 8 As shown, a plate and frame filter press for the production of liquid polyaluminum chloride includes a filter press body 100 and a plate and frame 101 mounted on the filter press body 100, and further includes:

[0047] The adjustable distance unit is located on both sides of the top of the filter press body 100. The adjustable distance unit includes a matching synchronous belt 203 and a fixed gear 215. The fixed gear 215 is fixedly installed on both sides of the plate frame 101. The synchronous belt 203 drives the plate frame 101 to move by cooperating with the fixed gear 215. The adjustable distance unit also includes a control mechanism. The control mechanism includes a rotating component 113. Clutches 110 are provided at both ends of the rotating component 113. A transmission mechanism is provided between the clutches 110 and the synchronous belt 203. The power transmission between the rotating component 113 and the synchronous belt 203 is controlled by controlling the engagement state of the clutches 110.

[0048] The cleaning unit is located on the top of the filter press body 100 and is used to clean the plate and frame 101.

[0049] like Figure 1 , Figure 12 , Figure 13 , Figure 14 As shown, in a specific embodiment, the adjusting unit is configured with an adjusting interval, wherein the adjusting interval is the interval between the two plate frames 101 after adjustment. The effective meshing length of the synchronous belt 203 satisfies the following conditions: the synchronous belt 203 meshes with the adjacent fixed gears 215 on both sides of the adjusting interval, and does not mesh with any three fixed gears 215, including the adjusting interval. In this configuration, when the synchronous belt 203 meshes with the fixed gears 215 on both sides of the adjusting interval simultaneously, it will not mesh with other fixed gears 215, wherein the effective meshing length is the length of the synchronous belt 203 that can mesh with the fixed gears 215.

[0050] like Figures 9 to 11 As shown, the transmission mechanism further includes a mounting frame 200, with a support shaft 205 slidably connected to the bottom of the mounting frame 200. Rollers 201 are rotatably mounted at both ends of the mounting frame 200, and the rollers 201 mesh with the inner wall of the timing belt 203. A pad 204 is fixedly mounted on one side of the mounting frame 200, supporting the timing belt 203 to maintain its shape. A support member 108 is fixedly mounted on one side of the mounting frame 200, and a rotating shaft 109 is rotatably mounted on the support member 108. A bevel gear set 202 is installed between the rotating shaft 109 and the rollers 201. In this configuration, the bevel gear set 202 consists of two mutually perpendicular bevel gears meshing together, used to transmit power. The top position of the rollers 201 is flush with the top position of the pad 204, so that the top of the timing belt 203 is in a flat state.

[0051] like Figures 6 to 8As shown, further, one end of the rotating component 113 and the clutch 110 is movably sleeved on the rotating shaft 109, and the other end of the clutch 110 is fixedly installed on the rotating shaft 109. Positioning rods 115 are fixedly installed at both ends of the rotating component 113. The movable end of the clutch 110 is movably sleeved on the positioning rods 115, and a first spring 116 is movably sleeved on the positioning rods 115. A groove is also formed on the rotating component 113. A connecting rod 111 is fixedly installed on the movable end of the clutch 110. The connecting rod 111 passes through the end of the rotating component 113 and extends into the groove. A connecting ring 112 is fixedly installed at one end of the connecting rod 111. In this configuration, the elastic force of the first spring 116 acts on the movable end of the clutch 110 to keep the clutch 110 in an engaged state. A transmission tooth groove 114 is formed on the rotating component 113. A transmission gear 107 is meshed on one side of the transmission tooth groove 114. When the transmission gear 107 rotates, it drives the rotating component 113 to rotate through the transmission tooth groove 114.

[0052] like Figure 4 , Figure 5 , Figure 7 As shown, further, a moving mechanism is provided on the support member 108. The moving mechanism includes a slide rod 119 fixedly connected to the support member 108. A connecting plate 117 is movably sleeved on the slide rod 119. The connecting plate 117 is rotatably connected to the connecting ring 112. A guide block 118 is fixedly installed on one side of the connecting plate 117. A guide protrusion 120 is provided on one side of the guide block 118. The lifting and lowering movement of the guide protrusion 120 drives the guide block 118 to move laterally to control the engagement state of the clutch 110. In this configuration, transmission sleeves 106 are fixedly installed at both ends of the transmission gear 107. The transmission sleeves 106 are rotatably connected to the support member 108. A transmission shaft 105 is slidably connected inside the transmission sleeve 106. A first power source 104 is installed at one end of the transmission shaft 105. The transmission shaft 105 and the transmission sleeve 106 rotate synchronously.

[0053] like Figures 4 to 6As shown, the support member 108 is further provided with a lifting mechanism. The lifting mechanism includes a pull rod 125 that is movably inserted into the support member 108. A pressure plate 121 is fixedly installed at the bottom of the pull rod 125. A protrusion 122 is provided at the bottom of the pressure plate 121. The lifting mechanism also includes a locking plate 123. A locking groove 124 is provided on the locking plate 123. The locking groove 124 is adapted to the protrusion 122. A support plate 127 is fixedly installed at the top of the pull rod 125. A magnetic attraction structure is provided at the top of the support plate 127. The magnetic attraction structure drives the pull rod 125 to rise so as to disengage the protrusion 122 from the locking groove 124. In this configuration, a second spring 126 is sleeved on the pull rod 125, and the two ends of the second spring 126 are fixedly connected to the support member 108 and the support plate 127 respectively. The magnetic attraction structure includes an electromagnet 129 and a magnetic plate 128. The magnetic plate 128 is fixedly connected to the support plate 127. After the electromagnet 129 is energized, it automatically de-energizes after 0.3 seconds, so that when the protrusion 122 rises and abuts against the clamping plate 123, the electromagnet 129 is ineffective. When the protrusion 122 is aligned with the clamping groove 124 again, the pressure plate 121 is driven to descend by the elastic force of the second spring 126 to lock the position. At this time, the cleaning unit is located in the middle position of the two plate frames 101 to be cleaned, which facilitates the cleaning unit to clean the plate and frame filter press.

[0054] like Figure 10 , Figure 11 , Figure 15 , Figure 19As shown, the mounting bracket 200 is further provided with a locking mechanism, which includes a fixed plate 206 fixedly mounted on the mounting bracket 200, a positioning sleeve 207 fixedly mounted on the fixed plate 206, a plug rod 208 movably inserted into the positioning sleeve 207, a brake plate 210 fixedly mounted at the bottom of the plug rod 208, the brake plate 210 and the support shaft 205 cooperate with each other, and the brake plate 210 and the support shaft 205 are kept relatively fixed by mutual pressing, and a first pressure rod 211 is fixedly mounted at the top of the plug rod 208. The locking mechanism also includes a rotating frame 212 rotatably mounted on the mounting bracket 200, the rotating frame 212 is adapted to the first pressure rod 211, a second pressure rod 213 is fixedly mounted on the rotating frame 212, and a guide rod 214 is fixedly mounted at one end of the second pressure rod 213. A third pressure rod 216 is fixedly mounted at one end of the fixed gear 215, and the guide rod 214 and the second pressure rod 213 are driven to descend by the third pressure rod 216. In this configuration, a third spring 209 is movably sleeved on the insertion rod 208. The third spring 209 drives the first pressure rod 211 to move upward, so that the brake plate 210 disengages from the support shaft 205. A rectangular protrusion can be provided on one side of the third pressure rod 216 so that the second pressure rod 213 disengages from the third pressure rod 216 more quickly than the arc surface of a round rod. When the second pressure rod 213 is subjected to the pressure of the third pressure rod 216, since its own rotation center is not on the same vertical line as the rotation center of the rotating frame 212, the second pressure rod 213 transmits pressure to the rotating frame 212, causing the rotating frame 212 to be subjected to a lateral component force, thereby driving the rotating frame 212 to rotate. When the rotating frame 212 rotates to the bottom, the first pressure rod 211 is pressed down to drive the brake plate 210 to descend, so as to keep it stationary by the friction between it and the support shaft 205, thereby achieving locking. At this time, the synchronous belt 203 rotates and meshes with the fixed gear 215 (refer to...). Figure 14 Since the timing belt 203 itself cannot move, the fixed gear 215 and the connected plate frame 101 are driven to move horizontally by the timing belt 203.

[0055] The filter press body 100 is equipped with hydraulic cylinders 102 on both sides. The output end of the hydraulic cylinder 102 is equipped with a base plate 103. The drive shaft 105 and the support shaft 205 are both connected to the base plate 103. The first power source 104 is fixedly connected to the base plate 103. The base plate 103 is driven to rise and fall by the hydraulic cylinder 102 so that the entire adjusting unit can rise and fall, thereby controlling the disengagement of the synchronous belt 203 from the fixed gear 215. The adjusting unit can be reset after disengagement.

[0056] like Figures 16 to 18As shown, the cleaning unit further includes a support block 300 fixedly installed on the top of the support member 108 and the mounting bracket 200, and a slide rail 301 slidably connected on the support block 300. The slide rail 301 is fixedly connected to the base plate 103. A gantry frame 302 is fixedly installed on the top of the support block 300. A cleaning mechanism is provided at the bottom of the gantry frame 302. When the protrusion 122 and the slot 124 cooperate with each other, the cleaning mechanism is in the middle position of the adjustment interval. The cleaning mechanism includes a lift 303 fixedly installed on the top of the gantry frame 302. A lifting plate 304 is fixedly installed at the bottom of the lift 303. A truss 305 is provided at both ends of the lifting plate 304. A cleaning component is provided on one side of the truss 305. The cleaning component includes a first scraper 306, and a second scraper 307 is rotatably installed at both ends of the first scraper 306. The first scraper 306 is fixedly connected to the truss 305. In this configuration, an electric cylinder 309 is fixedly installed at the bottom of the lifting plate 304. The output end of the electric cylinder 309 is fixedly connected to the truss 305. A second power source 308 is fixedly installed at both ends of the truss 305, and the output end of the second power source 308 is connected to the second scraper 307 to drive the second scraper 307 to adjust the angle, so as to adjust the effective scraping length at the plate frame 101. The effective scraping length is the length that the first scraper 306 and the second scraper 307 can scrape.

[0057] The implementation principle of a plate and frame filter press for the production of liquid polyaluminum chloride in this embodiment is as follows: When cleaning the plate and frame filter press, the first power source 104 drives the transmission shaft 105 to rotate, the transmission shaft 105 drives the transmission sleeve 106 to rotate, the transmission sleeve 106 drives the transmission gear 107 to rotate, the transmission gear 107 drives the transmission tooth groove 114 to rotate through meshing, so that the rotating part 113 rotates. During the rotation of the rotating part 113, the clutch 110 drives the rotating shaft 109 to rotate, the rotating shaft 109 drives the roller 201 to rotate through the bevel gear set 202, so that the synchronous belt 203 rotates, and the synchronous belt 203 drives the plate and frame 101 through mutual cooperation with the fixed gear 215.

[0058] During the movement of the plate frame 101, an adjustment interval is formed. When the plate frame 101 abuts against one end of the filter press body 100, the plate frame 101 cannot continue to move. At this time, the synchronous belt 203 continues to rotate and drives the adjustment unit to move as a whole under the meshing action with the fixed gear 215. When the cleaning unit is aligned with the adjustment interval, the protrusion 122 is aligned with the slot 124 on the card plate 123. At this time, the elastic force of the second spring 126 drives the pull rod 125 to move, so that the pressure plate 121 drives the protrusion 122 into the slot 124. While the pressure plate 121 descends, it drives the guide protrusion 120 to move. The guide protrusion 120 drives the guide block 118 to move, so that the connecting plates 117 move closer to each other. At the same time, the connecting plate 117 drives the connecting ring 112 to move. The connecting ring 112 drives the clutch 110 to disengage through the connecting rod 111. At this time, the synchronous belt 203 stops rotating, so that the adjustment unit remains stationary, which is convenient for the cleaning unit to clean.

[0059] When cleaning is complete, the electromagnet 129 operates and drives the magnetic plate 128 to rise, so that the support plate 127 rises. The pull rod 125 drives the protrusion 122 to separate from the slot 124. At this time, the guide protrusion 120 rises along with it, so that the elastic force of the first spring 116 acts on the clutch 110 and engages it. The synchronous belt 203 continues to rotate and drives the entire pitch adjustment unit to continue to move under the action of the engaged fixed gear 215. As the movement proceeds, the forward end of the synchronous belt 203 engages with the fixed gear 215 in the forward direction, and disengages from the fixed gear 215 at the other end of the synchronous belt 203 before engaging with the fixed gear 215 behind it. At this time, the synchronous belt 203 only engages with one fixed gear 215 and drives the corresponding plate frame 101 to move, thereby cleaning the subsequent pitch adjustment interval.

[0060] When the forward end of the synchronous belt 203 begins to mesh with the fixed gear 215 in the forward direction, the guide rod 214 begins to enter the bottom of the third pressure rod 216. At the same time, the third pressure rod 216 drives the guide rod 214 to descend along the inclined direction of the guide rod 214. When the synchronous belt 203 disengages from the fixed gear 215 behind it, the third pressure rod 216 completely presses down the guide rod 214 and the second pressure rod 213, and drives the rotating frame 212 to rotate. The rotating frame 212 drives the first pressure rod 211 to descend, so that the brake plate 210 abuts against the support shaft 205. The friction force keeps the entire pitch adjustment unit stationary. When the plate frame 101 moves to the other end and can no longer move, the third pressure rod 216 disengages from the second pressure rod 213, so that the brake plate 210 separates from the support shaft 205. At this time, the entire pitch adjustment unit can continue to move.

[0061] When the cleaning unit is working, the lifting plate 304 is first lowered to a suitable position by the lifting platform 303, and then the electric cylinder 309 is controlled to keep the first scraper 306 on both sides at a suitable distance to facilitate scraping the plate frame 101. The second scraper 307 is adjusted to a suitable angle by the second power source 308 to scrape the plate frame 101 more thoroughly.

[0062] 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 plate and frame filter press for the production of liquid polyaluminum chloride, comprising a filter press body (100) and a plate and frame (101) mounted on the filter press body (100), characterized in that, Also includes: The adjustable distance unit is located on both sides of the top of the filter press body (100). The adjustable distance unit includes a matching synchronous belt (203) and a fixed gear (215). The fixed gear (215) is fixedly installed on both sides of the plate frame (101). The synchronous belt (203) drives the plate frame (101) to move by cooperating with the fixed gear (215). The adjustable distance unit also includes a control mechanism. The control mechanism includes a rotating component (113). The rotating component (113) is provided with clutches (110) at both ends. A transmission mechanism is provided between the clutches (110) and the synchronous belt (203). The power transmission between the rotating component (113) and the synchronous belt (203) is controlled by controlling the engagement state of the clutches (110). A cleaning unit is located on the top of the filter press body (100), and the cleaning unit is used to clean the plate and frame (101); The transmission mechanism includes a mounting bracket (200), a support shaft (205) is slidably connected to the bottom of the mounting bracket (200), a support member (108) is fixedly installed on one side of the mounting bracket (200), and a rotating shaft (109) is rotatably installed on the support member (108). The support member (108) is also provided with a lifting mechanism. The lifting mechanism includes a pull rod (125) that is movably inserted into the support member (108). A pressure plate (121) is fixedly installed at the bottom of the pull rod (125). A protrusion (122) is opened at the bottom of the pressure plate (121). The lifting mechanism also includes a locking plate (123). A locking groove (124) is opened on the locking plate (123). The locking groove (124) is adapted to the protrusion (122). A support plate (127) is fixedly installed at the top of the pull rod (125). A magnetic attraction structure is provided at the top of the support plate (127). The magnetic attraction structure drives the pull rod (125) to rise so as to drive the protrusion (122) to disengage from the locking groove (124). The mounting bracket (200) is provided with a locking mechanism, which includes a fixing plate (206) fixedly installed on the mounting bracket (200), a positioning sleeve (207) fixedly installed on the fixing plate (206), a plug rod (208) movably inserted into the positioning sleeve (207), a brake plate (210) fixedly installed at the bottom of the plug rod (208), and the brake plate (210) cooperates with the support shaft (205). The brake plate (210) and the support shaft (205) are kept relatively fixed by mutual compression. The top of the insertion rod (208) is fixedly installed with a first pressure rod (211). The locking mechanism also includes a rotating frame (212) rotatably installed on the mounting frame (200). The rotating frame (212) is adapted to the first pressure rod (211). A second pressure rod (213) is fixedly installed on the rotating frame (212). A guide rod (214) is fixedly installed at one end of the second pressure rod (213). A third pressure rod (216) is fixedly installed at one end of the fixed gear (215). The guide rod (214) and the second pressure rod (213) are driven to descend by the third pressure rod (216).

2. A plate and frame filter press for the production of liquid polyaluminum chloride according to claim 1, characterized in that, The adjusting unit is configured with an adjusting interval, wherein the adjusting interval is the interval between the two plate frames (101) after adjustment, and the effective meshing length of the synchronous belt (203) satisfies that the synchronous belt (203) meshes with the adjacent fixed gears (215) on both sides of the adjusting interval, and does not mesh with any three fixed gears (215) including the adjusting interval.

3. A plate and frame filter press for the production of liquid polyaluminum chloride according to claim 2, characterized in that, The mounting bracket (200) has rollers (201) rotatably mounted at both ends. The rollers (201) mesh with the inner wall of the timing belt (203). A pad (204) is fixedly mounted on one side of the mounting bracket (200). The pad (204) supports the timing belt (203) to maintain its shape. A bevel gear set (202) is installed between the rotating shaft (109) and the rollers (201).

4. A plate and frame filter press for the production of liquid polyaluminum chloride according to claim 3, characterized in that, One end of the rotating component (113) and the clutch (110) are movably sleeved on the rotating shaft (109), and the other end of the clutch (110) is fixedly installed on the rotating shaft (109). Positioning rods (115) are fixedly installed at both ends of the rotating component (113). The movable end of the clutch (110) is movably sleeved on the positioning rod (115). A first spring (116) is movably sleeved on the positioning rod (115). A groove is also provided on the rotating component (113). A connecting rod (111) is fixedly installed at the movable end of the clutch (110). The connecting rod (111) passes through the end of the rotating component (113) and extends into the groove. A connecting ring (112) is fixedly installed at one end of the connecting rod (111).

5. A plate and frame filter press for the production of liquid polyaluminum chloride according to claim 4, characterized in that, The support member (108) is provided with a moving mechanism, which includes a slide rod (119) fixedly connected to the support member (108). A connecting plate (117) is movably sleeved on the slide rod (119). The connecting plate (117) is rotatably connected to the connecting ring (112). A guide block (118) is fixedly installed on one side of the connecting plate (117). A guide protrusion (120) is provided on one side of the guide block (118). The guide block (118) is moved laterally by the lifting and lowering movement of the guide protrusion (120) to control the engagement state of the clutch (110).

6. A plate and frame filter press for the production of liquid polyaluminum chloride according to claim 5, characterized in that, The cleaning unit includes a support block (300) fixedly installed on the top of the support member (108) and the mounting bracket (200), and a slide rail (301) is slidably connected on the support block (300). A gantry frame (302) is fixedly installed on the top of the support block (300), and a cleaning mechanism is provided at the bottom of the gantry frame (302). When the protrusion (122) and the slot (124) cooperate with each other, the cleaning mechanism is in the middle position of the adjustment interval.

7. A plate and frame filter press for the production of liquid polyaluminum chloride according to claim 6, characterized in that, The cleaning mechanism includes a lift (303) fixedly installed on the top of the gantry (302). A lifting plate (304) is fixedly installed at the bottom of the lift (303). A truss (305) is provided at both ends of the lifting plate (304). A cleaning component is provided on one side of the truss (305). The cleaning component includes a first scraper (306), and a second scraper (307) is rotatably installed at both ends of the first scraper (306). The first scraper (306) is fixedly connected to the truss (305).

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