A discharger for a filter press with a flight belt support mechanism

Abstract

The utility model discloses a kind of unloader of filter press with scraper belt support mechanism, including scraper assembly, scraper support assembly, unloader frame, travelling mechanism, lifting frame and its lifting frame drive mechanism;When discharging, scraper assembly and scraper support assembly walking positioning are placed to the filter cloth two pairs of side, then drop simultaneously, scraper support assembly is lifted from filter plate with the filter cloth of scraper assembly's scraper and together with filter cloth scraper material, can avoid due to filter cloth flatly placed on the filter plate surface with boss causes filter cloth surface uneven, leading to not easy to scrape clean material while easily causing filter cloth surface scratch condition.In addition, the design of L-shaped swing rod can solve the problem that reliable unloading cannot be achieved when the feed inlet is located in the middle of the filter plate, has strong applicability, and ensures the scraping effect.

Description

Technical Field

[0001] This utility model relates to the field of filter press technology, specifically to a discharge machine for a filter press with a scraper and support mechanism. Background Technology

[0002] As a general-purpose solid-liquid separation device, the filter press is increasingly widely used in various industries. With continuous social development and technological progress, the requirements for the automation level and stability of the equipment are becoming increasingly stringent. Among these requirements, the ability of the filter press to achieve automatic and reliable unloading is a key factor in realizing truly automated operation. Incomplete unloading is often a significant cause of equipment failure. Currently, the main technologies for filter press unloading include: for materials with low viscosity, automatic gravity unloading is used; for materials with slightly higher viscosity, pneumatic vibration of the filter cloth, or vibrating and shaking of the filter plates, or manual assistance, are used; while for most materials with high viscosity, manual unloading or forced unloading devices are mostly used.

[0003] Currently, forced unloading devices on the market mainly work by driving the filter cloth to move up and down, using a scraper to scrape the material off the filter cloth. For example, invention patent CN112121486A describes a filter press with synchronous filter cloth movement, where the material is scraped off the filter cloth by a scraper after the filter cloth is driven to move. Another structure uses a scraper that directly presses against the surface of the filter cloth on the filter plate, scraping the material off the surface from top to bottom. Additionally, a foreign unloading method allows the material to be scraped off the filter cloth without requiring it to move up and down. However, the feed inlet for this method can only be located at the bottom of the filter plate.

[0004] The above-described method of unloading filter cloth, whether driven individually or together, requires the filter cloth to move up and down relative to the filter plate during unloading, necessitating an additional drive unit. When unloading filter cloths together, all filter plates must be fully opened to simultaneously drive the cloths. Compared to filter presses that unload filter cloths one by one, this method significantly increases the equipment length for the same number of filter plates, sometimes exceeding process requirements. Furthermore, the feed inlets for the filter cloths and filter plates are not fixed, making reliable sealing difficult to guarantee for materials with complex operating conditions. Adding a filter cloth drive unloading structure to each filter plate would make the equipment extremely complex and costly, failing to meet most market demands.

[0005] The method of scraping and unloading material by directly pressing a scraper onto the surface of the filter cloth on the filter plate has multiple support protrusions on the surface of the filter plate to prevent excessive deformation. As a result, the surface of the filter plate is uneven, and the scraper cannot scrape the material cleanly and is prone to damaging the filter cloth. The unloading method discovered abroad is suitable for specific material scenarios, but it is not applicable when the process requires the feed inlet to be inside the filter plate.

[0006] In most filter presses on the market, considering reliability and cost factors, the filter cloth and filter plate are fixed together. This means that the feed inlets of both are fixed together, which can ensure reliable sealing and adapt to all working conditions. Filter presses that require the filter cloth to be driven during unloading are suitable for specific process applications and must be remanufactured when needed. Their structure is difficult to modify and apply to most filter presses with fixed filter cloth. Compared with filter presses with fixed filter cloth, their structure is more complex, the cost is higher, and maintenance is relatively more troublesome. Utility Model Content

[0007] To overcome the above-mentioned defects, this utility model proposes a widely adaptable filter press unloading device that can be applied to most filter presses on the market. It achieves clean and reliable unloading while ensuring the original inlet sealing structure, thus helping to popularize the automatic unloading method of general filter press equipment in various complex application scenarios.

[0008] The technical solution of this utility model is as follows: a scraper unloading machine for a filter press with a scraper and a support mechanism, including a scraper assembly, a scraper support assembly, an unloading machine frame, a walking mechanism, a lifting frame and its lifting frame drive mechanism. A walking mechanism is installed at the bottom of the unloading machine frame to enable it to move horizontally, and a lifting frame is installed on the unloading machine frame. The two ends of the lifting frame are connected to the lifting frame drive mechanism to enable it to move vertically. The lower part of the lifting frame is connected to the scraper assembly and the scraper support assembly; The filter plate assembly mainly consists of a filter plate, filter cloth, filter cloth hanging rod, and swing rod. The upper end of the filter cloth is hung on the filter cloth hanging rod, and a set of swing rods is connected to each end of the filter cloth hanging rod. The other end of the swing rod is connected to both sides of the filter plate through a mounting shaft.

[0009] Furthermore, the lifting frame drive mechanism includes a motor, a through shaft, and an annular chain. The motor is connected to the through shaft, and each end of the through shaft has an annular chain. The two ends of the lifting frame are respectively fixed to the chains on both sides.

[0010] Furthermore, a water spray nozzle is installed on the inside of the connecting rod in the scraper assembly.

[0011] Furthermore, the scraper assembly mainly consists of a connecting rod, a scraper, and a cylinder. The end of the connecting rod is hinged to the middle and both ends of the scraper. One end of the cylinder is connected to the outside of the connecting rod, and the other end is connected to the rear end of the scraper.

[0012] Furthermore, the scraper support assembly includes a connecting rod and a fixed support rod. The end of the connecting rod is inclined toward the scraper assembly and is vertically connected to the fixed support rod. The fixed support rod and the front end of the scraper clamp the intermediate filter cloth.

[0013] Furthermore, a feed inlet is provided on the filter plate, and a filter cloth retaining ring fixes the filter cloth to the filter plate at the feed inlet position.

[0014] Furthermore, L-shaped swing support rods are connected to the opposite sides of the two sets of fixed support rods respectively. The bent part of the L-shaped swing support rod is connected to the end of the fixed support rod by a pin. A spring is connected between the fixed support rod and the L-shaped swing support rod.

[0015] Furthermore, a positioning switch is installed on the unloading machine's walking mechanism, which can position the unloading machine to stop above the filter plate pulled apart by the pull plate trolley during cake unloading, facilitating unloading.

[0016] Compared with existing technologies, the advantages of this invention are as follows: During unloading, the scraper assembly and scraper support assembly move and position themselves on the opposite side of the vertically placed filter cloth, and then descend simultaneously. The scraper support assembly lifts the filter cloth from the filter plate and, together with the scraper of the scraper assembly, clamps the filter cloth to scrape the material. This avoids the problem of uneven surface of the filter cloth caused by it being laid flat on the surface of the filter plate with protrusions, which makes it difficult to scrape the material clean and easily scratches the surface of the filter cloth. In addition, the design of the L-shaped swing rod can solve the problem of unreliable unloading when the feed inlet is located in the middle of the filter plate, which requires high applicability and ensures the scraping effect. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is an overall structural diagram of the unloading machine in use.

[0019] Figure 2 yes Figure 1 AA sectional view.

[0020] Figure 3 This is a side view of the unloading machine.

[0021] Figure 4 This is a structural diagram of the filter plate assembly.

[0022] Figure 5 This is a side view of the filter plate assembly (two states).

[0023] Figure 6 This is a diagram showing the working state of a discharge machine with a feed inlet in the middle of the filter plate (when the support rod descends to the top of the filter plate).

[0024] Figure 7 yes Figure 6 BB sectional view.

[0025] Figure 8 This is a diagram showing the support status when the support rod descends to the feed inlet.

[0026] Figure 9 This refers to the state of the support rod when it passes through the feed inlet of the filter plate.

[0027] Figure 10 It is the support state when the support rod returns upward and passes through the feed inlet.

[0028] Figure 11 This is a diagram showing the working state of a discharge machine with a feed inlet at the bottom of the filter plate.

[0029] Figure 12 yes Figure 11 A sectional view along the BB direction.

[0030] In the diagram: 1. Filter plate assembly; 2. Plate pulling trolley; 3. Unloading machine frame; 4. Scraper assembly; 5. Scraper support assembly; 6. Nozzle; 7. Connecting rod; 8. Filter press main beam; 31. Unloading machine traveling mechanism; 32. Lifting frame; 33. Lifting frame drive mechanism; 11. Filter cloth; 12. Filter plate; 13. Feed inlet; 14. Filter cloth hanging rod; 15. Filter cloth fixing ring; 16. Swing rod; 41. Cylinder; 42. Scraper; 51. Scraper fixing support rod; 52. Spring; 53. Scraper L-shaped swing support rod. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0032] like Figure 1-11 As shown, a scraper with a support mechanism for a filter press includes a scraper assembly 4, a scraper support assembly 5, a discharger frame 3, a traveling mechanism 31, a lifting frame 32 and its lifting frame drive mechanism 33. A walking mechanism 31 is installed at the lower part of the unloading machine frame 3 to make it move horizontally, and a lifting frame 32 is installed on the unloading machine frame 3. The two ends of the lifting frame 32 are connected to the lifting frame drive mechanism 33 to make it move vertically. The lower part of the lifting frame 32 is connected to the scraper assembly 4 and the scraper support assembly 5; The filter plate assembly 1 mainly consists of a filter plate 12, a filter cloth 11, a filter cloth hanging rod 14, and a swing rod 16. The upper end of the filter cloth 11 is hung on the filter cloth hanging rod, and the other three sides of the filter cloth are tied together with another filter cloth on the back of the filter plate by a strip. A set of swing rods is connected to each end of the filter cloth hanging rod, and the other end of the swing rod is connected to both sides of the filter plate by a mounting shaft. A feed inlet 13 can also be opened on the filter plate. The filter cloth fixing ring 15 fixes the filter cloth and the filter plate at the feed inlet position. The position of the feed inlet will affect the structure of the scraper support assembly.

[0033] The lifting frame drive mechanism 33 includes a motor, a through shaft, and an annular chain. The motor is connected to the through shaft, and each end of the through shaft has an annular chain. The two ends of the lifting frame are respectively fixed to the chains on both sides.

[0034] A water spray nozzle 6 is installed on the inner side of the connecting rod in the scraper assembly 4. When it is necessary to wash the cloth, the lifting frame is lowered, and the water spray nozzle installed on the scraper assembly is facing the surface of the filter cloth with material, spraying water onto the surface to wash the cloth.

[0035] The scraper assembly 4 mainly consists of a connecting rod 7, a scraper 42, and a cylinder 41. The end of the connecting rod is hinged to the middle and both ends of the scraper. One end of the cylinder is connected to the outside of the connecting rod, and the other end is connected to the rear end of the scraper. The scraper support assembly 5 includes a connecting rod 7 and a fixed support rod 51. The end of the connecting rod is inclined towards the scraper assembly and is vertically connected to the fixed support rod. The fixed support rod and the front end of the scraper clamp the intermediate filter cloth.

[0036] The unloading machine is installed on the main beam 8 of the filter press and can move on the main beam under the drive of the unloading machine walking mechanism. The unloading machine walking mechanism is equipped with a positioning switch, which can position the unloading machine to stop above the filter plate pulled apart by the pull plate trolley during cake unloading, so as to facilitate unloading. One scraper assembly and one scraper support assembly constitute one unloading unit, which unloads one filter cloth. There are two filter cloths on each side of one filter plate, so there are two unloading units on the lifting frame. If N filter plates are unloaded at the same time, there are 2N filter cloths, so there need to be 2N unloading units on the lifting frame.

[0037] During unloading, the scraper assembly falls to the side of the filter cloth with material, and the cylinder on the scraper assembly drives the scraper to press on the filter cloth. At the same time, the scraper support assembly falls to the other side of the filter cloth, presses against the filter cloth and supports the scraper, and moves together with the scraper. In this way, the material on the surface of the filter cloth can be scraped clean.

[0038] The above applies to cases where the feed inlet is located at the bottom of the filter plate or there is no feed inlet. The scraper support assembly consists of a continuous scraper fixing support rod.

[0039] When the feed inlet 13 is opened on the filter plate, the filter cloth fixing ring fixes the filter cloth to the filter plate at the feed inlet position. The structure needs to be adjusted by dividing the entire fixed support rod into two sections. The two sets of fixed support rods 51 are respectively connected to L-shaped swing support rods 53 on opposite sides. The bend of the L-shaped swing support rod is connected to the end of the fixed support rod by a pin. A spring 52 connects the fixed support rod and the L-shaped swing support rod. When the scraper and its support assembly descend to the feed inlet of the filter plate, the scraper L-shaped swing support rod of the support assembly is blocked by the fixed filter cloth at the feed inlet and rotates 90 degrees (e.g., ...). Figure 8 As shown), this allows the scraper to continue supporting itself while bypassing the filter cloth fixed at the feed inlet, and bypassing the feed inlet (as shown). Figure 9 After (as shown), the scraper and its support assembly continue to move downwards to the lower end of the filter plate to complete the unloading. Upon return, the L-shaped swing support rod of the scraper assembly is blocked by the fixed filter cloth at the feed inlet and rotates 90 degrees in the opposite direction (as shown). Figure 10 As shown in the figure, after bypassing the feed inlet, it continues to move upward, leaving the filter plate and returning to its initial state. Then, the unloader continues to perform the same unloading action on the next filter plate.

[0040] Working principle: I. Unloading begins, for the case of unloading one filter plate at a time: After the filter press has finished pressing the material, the plate pulling trolley pulls the first filter plate apart. The upper ends of the filter cloth on both sides of the filter plate swing outward and separate under the gravity of its fixed rod, so that the upper ends of the filter cloth leave the filter plate, making it easier for the scraper support rod to enter between the filter cloth and the filter plate. When the unloading machine moves above the filter plate, the lifting frame descends, and the scraper assembly descends to the side of the filter cloth with material. The cylinder on the scraper assembly drives the scraper to press on the filter cloth. At the same time, the scraper support assembly descends to the other side of the filter cloth, presses against the filter cloth and supports the scraper, and moves together with the scraper. In this way, the material on the surface of the filter cloth can be scraped clean. II. For each unloading of N filter plates: N filter plates are pulled apart by a plate-pulling trolley at equal intervals. Then, the lifting frame lowers simultaneously with 2N unloading units. Each of the 2N unloading units corresponds to one of the 2N filter cloths and unloads them simultaneously. The unloading action is the same as described above.

[0041] 3. When it is necessary to clean the surface of the filter cloth: The lifting frame descends, and multiple water spray nozzles installed on the scraper assembly spray water onto the surface of the filter cloth containing material, washing the cloth.

[0042] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A discharge machine for a filter press with a scraper and support mechanism, characterized in that, Includes scraper assembly, scraper support assembly, unloader frame, traveling mechanism, lifting frame and its lifting frame drive mechanism; A walking mechanism is installed at the bottom of the unloading machine frame to enable it to move horizontally. A lifting frame is installed on the unloading machine frame, and the two ends of the lifting frame are connected to the lifting frame drive mechanism to enable it to move vertically. The lower part of the lifting frame is connected to the scraper assembly and the scraper support assembly; The filter plate assembly mainly consists of a filter plate, filter cloth, filter cloth hanging rod, and swing rod. The filter cloth is hung on the filter cloth hanging rod at both ends, and a set of swing rods is connected to each end of the filter cloth hanging rod. The other end of the swing rod is connected to both sides of the filter plate through a mounting shaft.

2. The unloading machine for a filter press with a scraper and support mechanism according to claim 1, characterized in that, The lifting frame drive mechanism includes a motor, a through shaft, and a ring chain. The motor is connected to the through shaft, and each end of the through shaft has a ring chain. The two ends of the lifting frame are respectively fixed to the chains on both sides.

3. The unloading machine for a filter press with a scraper and support mechanism according to claim 1, characterized in that, A water nozzle is installed on the inside of the connecting rod in the scraper assembly.

4. The unloading machine for a filter press with a scraper and support mechanism according to claim 1, characterized in that, The scraper assembly mainly consists of a connecting rod, a scraper, and a cylinder. The end of the connecting rod is hinged to the middle and both ends of the scraper. One end of the cylinder is connected to the outside of the connecting rod, and the other end is connected to the rear end of the scraper.

5. The unloading machine for a filter press with a scraper and support mechanism according to claim 1 or 4, characterized in that, The scraper support assembly includes a connecting rod and a fixed support rod. The end of the connecting rod is inclined toward the scraper assembly and is vertically connected to the fixed support rod. The fixed support rod and the front end of the scraper clamp the intermediate filter cloth.

6. The unloading machine for a filter press with a scraper and support mechanism according to claim 5, characterized in that, A feed inlet is provided on the filter plate, and a filter cloth retaining ring fixes the filter cloth to the filter plate at the feed inlet position.

7. The unloading machine for a filter press with a scraper and support mechanism according to claim 6, characterized in that, Two sets of fixed support rods are connected to L-shaped swing support rods on opposite sides. The bent part of the L-shaped swing support rod is connected to the end of the fixed support rod by a pin. A spring is connected between the fixed support rod and the L-shaped swing support rod.

8. The unloading machine for a filter press with a scraper and support mechanism according to claim 1, characterized in that, A positioning switch is installed on the walking mechanism of the unloading machine.

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