Locking device for push plate of filter press

Abstract

The utility model provides a locking device for a push plate of a filter press. The locking device comprises a speed reducer and a transmission shaft, wherein the speed reducer is fixedly arranged on an oil cylinder bracket of the filter press; the transmission shaft is fixedly connected to the output end of the speed reducer; one end of the threaded rod is arranged outside the transmission shaft in a sleeving mode, threads are arranged outside the threaded rod, and the transmission shaft is slidably connected with the interior of the threaded rod; a threaded sleeve in threaded connection with the threaded rod is fixedly arranged on the filter press oil cylinder support, the threaded rod penetrates through the threaded sleeve to extend outwards and is close to the push plate end of the filter press, and when the speed reducer drives the transmission shaft to rotate, the threaded rod does linear motion relative to the threaded sleeve; and when the push plate of the filter press reaches a specified position, the speed reducer drives the end part of the threaded rod to abut against the end part of the push plate so as to lock the push plate. The problem that the locking force of hydraulic oil of an existing filter press is limited is solved, the push plate is locked through the end of the threaded rod, the springback phenomenon of the push plate is avoided, and it is ensured that sufficient filtering can be completed during filtering.

Description

Technical Field

[0001] The utility model belongs to the technical field of filter presses, and in particular relates to a locking device for a push plate of a filter press. Background Art

[0002] The filter press uses a special filter medium to exert a certain pressure on the object to be filtered, causing the liquid to seep out. It is a mechanical device that is commonly used for solid-liquid separation.

[0003] When the existing filter press is performing filtration, the piston rod pushes the push plate toward the filter plate, squeezes the filter medium between the filter plate and the push plate, and completes the filtration action. After the hydraulic cylinder piston rod pushes the push plate to the set position, the oil pressure of the hydraulic oil is required to continue to push the push plate to remain unchanged to complete the purpose of locking the push plate during the filtration process. However, when the oil cylinder pushes the push plate to maintain the position, the oil cylinder needs to supply oil to continue working. Due to the limited pressure of the oil pressure, when the oil pressure in the oil tank is too low, the oil cylinder has no way to continue to maintain the squeezing force between the push plate and the filter, and the push plate rebounds, resulting in the push plate being unable to be locked in position, causing incomplete filtration. Utility Model Content

[0004] In order to solve the problem that the existing filter press maintains the position of the push plate by the oil cylinder, which easily causes incomplete filtration due to the inability to continue to maintain the extrusion force between the push plate and the filter when the oil pressure of the hydraulic oil is too low, a filter press and a locking device for the push plate of the filter press are provided, which can lock the push plate after the push plate reaches the position to prevent the push plate from rebounding.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A locking device for a filter press push plate, comprising:

[0007] A reducer fixedly mounted on the oil cylinder bracket of the filter press, a transmission shaft fixedly connected to the output end of the reducer; a threaded rod with one end sleeved outside the transmission shaft and having threads on the outside, and the transmission shaft is slidably connected to the inside of the threaded rod;

[0008] A threaded sleeve threadedly connected to the threaded rod is fixedly provided on the filter press oil cylinder bracket, the threaded rod extends outward through the threaded sleeve and approaches the push plate end of the filter press, and when the reducer drives the transmission shaft to rotate, the threaded rod moves linearly relative to the threaded sleeve;

[0009] When the push plate of the filter press reaches a specified position, the end of the threaded rod driven by the reducer contacts the end of the push plate to lock the push plate.

[0010] Furthermore, a baffle is fixedly provided on the filter press oil cylinder bracket, and the threaded sleeve is fixedly connected to the baffle.

[0011] Furthermore, a guide groove is provided on the circumferential surface of the transmission shaft, and a guide key cooperating with the guide groove is provided on the inner wall of the threaded rod, and the guide key is inserted into the guide groove for sliding connection.

[0012] Furthermore, a connecting sleeve is provided on the outer sleeve of the threaded rod, and the inner diameter of the connecting sleeve is larger than the outer diameter of the threaded rod. One end of the connecting sleeve is fixedly connected to the reducer, and the other end is fixedly connected to the baffle.

[0013] Furthermore, the end surfaces of the connecting sleeve and the threaded sleeve are fixedly connected with flanges which are fixedly connected to both ends of the baffle.

[0014] Furthermore, the raised strip and the transmission shaft are an integral structure.

[0015] Beneficial effect: after the oil cylinder drives the push plate to reach the position, the reducer drives the transmission shaft to rotate, and the transmission shaft drives the threaded rod to approach the push plate during the rotation. When the threaded rod conflicts with the push plate, the reducer stops working. Since the threaded rod and the threaded sleeve are connected by threads, when the reducer stops working, the threaded rod and the threaded sleeve remain in a fixed connection state. At this time, the end of the threaded rod locks the push plate to prevent the push plate from rebounding, ensuring that sufficient filtration can be completed during filtration. At the same time, after the oil cylinder drives the push plate to the position and the threaded rod completes the locking of the push plate, the oil cylinder stops working, avoiding the waste of resources caused by the continued operation of the oil cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiment of the utility model and its design scheme, the following is a brief introduction to the drawings required for the embodiment. The drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a schematic diagram of the structure of the locking device in the embodiment of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the locking device of the filter press push plate in the embodiment of the utility model;

[0019] Figure 3 It is a structural schematic diagram of the locking device of the push plate of the double-rod filter press in the embodiment of the utility model.

[0020] In the figure: 1. filter press cylinder bracket; 2. reducer; 3. transmission shaft; 4. threaded rod; 5. threaded sleeve; 6. push plate; 7. baffle; 8. connecting sleeve; 9. flange; 10. cylinder; 11. filter plate. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the utility model and implement it, the utility model is described in detail below in conjunction with the accompanying drawings and specific embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0022] Device Example 1:

[0023] like Figure 1-3 The filter press in this embodiment at least includes a filter press cylinder support 1, a cylinder 10 fixed on the filter press cylinder support 1, a push plate 6 fixedly connected to the driving end of the cylinder 10, and a filter plate 11 fixedly provided. During the filtration process, the medium to be filtered is located between the filter plate and the push plate 6, and the push plate 6 is driven by the cylinder 10 to move toward the filter plate 11 to squeeze the medium to be filtered between the filter plate 11 and the push plate 6, thereby completing the purpose of filtration.

[0024] In this embodiment, if Figure 1 , Figure 2 and Figure 3 The locking device of the filter press push plate shown in the figure includes a reducer 2 fixed on the filter press cylinder bracket 1, the reducer 2 is fixedly connected to the filter press cylinder bracket 1 by bolts to ensure that the reducer 2 can work stably during operation, a transmission shaft 3 is fixedly connected to the output end of the reducer 2, the transmission shaft 3 is connected to the output shaft of the reducer 2 by a coupling, a threaded rod 4 is movably connected to the transmission shaft 3 connected to the reducer 2, the threaded rod 4 is hollow, the end of the transmission shaft 3 is inserted into the threaded rod 4 and is slidably connected to the inside of the threaded rod 4, and the transmission shaft 3 can It is capable of driving the threaded rod 4 to rotate; in another embodiment, a guide groove is provided on the circumferential surface of the transmission shaft 3, and the inner wall of the threaded rod 4 is provided with a guide key that cooperates with the guide groove, and the guide key is inserted into the guide groove for sliding connection. Specifically, the guide key is parallel to the center line of the threaded rod 4. This connection method can ensure that the transmission shaft 3 drives the threaded rod 4 to rotate during the rotation process, and the force is transmitted. At the same time, the threaded rod 4 can move linearly along the transmission shaft 3; in one embodiment, the guide key can be arranged on the transmission shaft 3, and the guide groove can be arranged on the threaded rod.

[0025] A threaded sleeve 5 threadedly connected to a threaded rod 4 is fixedly provided on the filter press oil cylinder bracket 1. The threaded rod 4 extends outward through the threaded sleeve 5 and approaches the push plate 6 end of the filter press. When the reducer 2 drives the transmission shaft 3 to rotate, the threaded rod 4 moves linearly along the threaded sleeve 5.

[0026] When the push plate 6 of the filter press reaches a specified position, the reducer 2 drives the end of the threaded rod 4 to contact the end of the push plate 6 to lock the push plate 6.

[0027] When locking, the reducer 2 drives the transmission shaft 3 to rotate. Since the threaded rod 4 is slidably connected to the transmission shaft 3, the transmission shaft 3 drives the threaded rod 4 to rotate when rotating. Since the threaded rod 4 is threadedly connected to the threaded sleeve 5 fixed on the filter press oil cylinder bracket 1, the threaded sleeve 5 is in a fixed state, so the threaded rod 4 can perform a linear motion in a rotating state along the threaded sleeve 5 when rotating, and the end of the threaded rod 4 can approach or move away from the end of the push plate 6. When the end of the threaded rod 4 conflicts with the push plate 6, the locking work of the push plate 6 is completed, and when it leaves the push plate 6, the unlocking work is completed.

[0028] Specifically, during operation, when the oil cylinder 10 drives the push plate 6 to move toward the filter plate 11, the medium to be filtered between the push plate 6 and the filter plate 11 is squeezed between the push plate 6 and the filter plate 11 for solid-liquid separation. When the push plate 6 reaches the specified position, the reducer 2 drives the threaded rod 4 to rotate. During the rotation of the threaded rod 4, since the threaded rod 4 is threadedly connected to the fixed threaded sleeve 5 and the threaded rod 4 is slidably connected to the transmission shaft 3, the threaded rod 4 moves forward relative to the threaded sleeve 5. When the end of the threaded rod 4 contacts the push plate 6, the reducer 2 and the oil cylinder 10 are closed, and the threaded rod 4 supports the push plate 6. The locking function is completed to ensure that a continuous extrusion pressure is formed between the push plate 6 and the filter plate 11 for filtering. At the same time, since the threaded rod 4 and the threaded sleeve 5 are threadedly connected, no relative rebound phenomenon will occur when the push plate 6 is resisted by the threaded rod 4. Furthermore, since the threaded rod 4 is used for continuous resistance, the driving force of the oil cylinder 10 on the push plate 6 is released, and the situation in which the oil cylinder 10 cannot work continuously due to the oil amount in the oil cylinder 10 is avoided. At the same time, since the oil cylinder 10 is closed when the threaded rod 4 is used for resistance, the oil consumption of the oil cylinder is effectively saved, saving costs and resources.

[0029] After the filtration is completed, the reducer 2 is turned on, and the reducer 2 rotates in the opposite direction, driving the end of the threaded rod 4 to separate from the push plate 6, and after reaching the specified position, the cylinder 10 is turned on to bring the push plate 6 to the specified position to complete a filter press.

[0030] In another embodiment, a baffle 7 is fixedly provided on the filter press cylinder bracket 1. The baffle 7 is arranged at one end close to the push plate 6 and is parallel to the push plate 6. The baffle 7 is fixedly connected to the filter press cylinder bracket 1 by bolts, and the threaded sleeve 5 is fixedly connected to the baffle 7. In one embodiment, a flange 9 is fixedly connected to the end of the threaded sleeve 5. The flange 9 is welded to the threaded sleeve 5, and then the flange 9 and the baffle 7 are fixedly connected together by bolts. At the same time, a through hole identical to the threaded sleeve 5 is provided on the baffle 7, and the diameter of the through hole is larger than the diameter of the threaded sleeve 5.

[0031] In another embodiment, a connecting sleeve 8 is provided on the outer sleeve of the threaded rod 4, and the inner diameter of the connecting sleeve 8 is larger than the outer diameter of the threaded rod 4. The threaded rod 4 is located in the connecting sleeve 8, which can effectively protect the staff while protecting the threaded rod 4, and prevent the threaded rod 4 from being entangled with other objects during rotation. When connecting, one end of the connecting sleeve 8 is fixedly connected to the reducer 2, and the other end is fixedly connected to the baffle 7. Specifically, when connecting, a flange 9 is welded at both ends of the connecting sleeve 8, and then the flanges 9 fixedly connected at both ends of the connecting sleeve 8 are fixedly connected to the reducer 2 and the baffle 7, respectively, and the connecting sleeve 8 is connected to the threaded sleeve 5.

[0032] In another embodiment, two locking devices for filter press push plates provided in this embodiment can be installed in one filter press, such as Figure 2 As shown in the figure, the locking device can be provided on both sides of the oil cylinder on a single-bar filter press, or four locking devices can be installed on both sides of the upper and lower end surfaces of the filter press oil cylinder bracket 1 to lock the push plate.

[0033] In another embodiment, the locking device can be used as follows Figure 3 On the double-bar filter press shown, the locking devices can be two or four, and the installation method is the same as that on the single-bar filter press.

[0034] In another embodiment, the reducer is electrically connected to the travel switch and the induction switch. After the oil cylinder 10 of the filter press pushes the push plate 6 of the filter press to press the filter plate 11 into place, the reducer 2 is started, and the threaded rod 4 moves into place in the direction of the push plate 11 of the filter press. Then, the travel switch takes effect, the reducer stops rotating, and the threaded rod 4 stops moving forward. After the slurry is fed and the mud cake is squeezed, the reducer 2 is reversed, and the threaded rod 4 is loosened and moves into place in the direction away from the push plate 6 of the filter press. Then, the induction switch takes effect, the reducer stops rotating, and the threaded rod 4 stops moving.

[0035] It should be noted that the above specific implementation methods can enable those skilled in the art to more fully understand the invention of the utility model, but do not limit the invention of the utility model in any way. Therefore, although the invention of the utility model has been described in detail in this specification and embodiments, those skilled in the art should understand that the invention of the utility model can still be modified or replaced by equivalents; and all technical solutions and improvements that do not deviate from the spirit and scope of the invention of the utility model are included in the protection scope of the patent of the invention of the utility model.

Claims

1. A locking device for a filter press push plate, characterized in that: include: A reducer (2) is fixedly mounted on a filter press oil cylinder support (1), and a transmission shaft (3) is fixedly connected to an output end of the reducer (2); a threaded rod (4) is sleeved on one end of the transmission shaft (3) and has threads on the outside, and the transmission shaft (3) is slidably connected to the inside of the threaded rod (4); A threaded sleeve (5) threadedly connected to the threaded rod (4) is fixedly provided on the filter press oil cylinder bracket (1); the threaded rod (4) passes through the threaded sleeve (5) to extend outward and approach the push plate (6) end of the filter press; and when the reducer (2) drives the transmission shaft (3) to rotate, the threaded rod (4) moves linearly along the threaded sleeve (5); When the push plate (6) of the filter press reaches a specified position, the reducer (2) drives the end of the threaded rod (4) to contact the end of the push plate (6), thereby locking the push plate (6).

2. The locking device for the filter press push plate according to claim 1, characterized in that: A baffle plate (7) is fixedly provided on the filter press oil cylinder bracket (1), and the threaded sleeve (5) is fixedly connected to the baffle plate (7).

3. The locking device for the filter press push plate according to claim 1, characterized in that: A guide groove is provided on the circumferential surface of the transmission shaft (3), and a guide key cooperating with the guide groove is provided on the inner wall of the threaded rod (4), wherein the guide key is inserted into the guide groove for sliding connection.

4. The locking device for the filter press push plate according to claim 2, characterized in that: The threaded rod (4) is provided with a connecting sleeve (8) on its outer sleeve, and the inner diameter of the connecting sleeve (8) is larger than the outer diameter of the threaded rod (4); one end of the connecting sleeve (8) is fixedly connected to the reducer (2), and the other end is fixedly connected to the baffle (7).

5. The locking device for the filter press push plate according to claim 4, characterized in that: The end surfaces of the connecting sleeve (8) and the threaded sleeve (5) are fixedly connected to flanges (9) that are fixedly connected to both ends of the baffle (7).

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