Filter press moving frame locking device

Abstract

The utility model relates to filter press mobile rack locking device technical field, and disclose filter press mobile rack locking device, include: frame, the left and right sides of frame are provided with the transverse board, are provided with the oil jar seat on the transverse board, the top left and right sides of oil jar seat are provided with the fixed base, are provided with the gyro wheel on the fixed base, the central part of oil jar seat is provided with main oil jar, the left and right sides transverse board of frame are provided with the auxiliary oil jar, and the telescopic rod top of auxiliary oil jar is connected fixed with the fixed base, the top of oil jar seat is provided with control valve block, the top of fixed base left side of oil jar seat top is provided with the tow chain, and the front side of fixed base left and right sides of oil jar seat top is provided with the pivot, and the pivot swing joint is provided with locking rod, the left and right sides symmetry of main oil jar is provided with hydraulic cylinder, and the telescopic rod top of hydraulic cylinder is connected with locking rod lower part fixed axle, and the inside of transverse board is provided with preset locking block, through hydraulic cylinder and locking rod swing joint, promote the work reliability of locking device.

Description

Technical Field

[0001] This utility model relates to the field of filter press locking technology, specifically a filter press moving frame locking device. Background Technology

[0002] During the operation of a filter press, the stable locking of the moving frame is crucial to ensuring the filtration effect of the filter plates and preventing operational deviations. As industrial production increasingly demands higher filtration efficiency and operational stability from filter presses, the reliability and durability of the moving frame locking device have become a key focus of the industry.

[0003] Currently, existing filter press locking technologies mostly rely on a combination of hydraulic drive and mechanical locking to achieve their functions. Among them, the locking structure disclosed in Chinese patent CN221713658U is somewhat representative.

[0004] This patented technology uses the internal thread inside the transmission nut to engage with the thread at the end of the telescopic rod to form a locking structure. During operation, the hydraulic system needs to be switched to the locking device's oil circuit to drive the thread engagement action and complete the locking. However, this design has certain drawbacks: During the switching of hydraulic circuits, the oil pressure is prone to instantaneous fluctuations, and the cylinder needs to output continuous pressure to maintain the engagement state when the threaded engagement is locked, which causes the cylinder to be in an unstable stress condition for a long time. At the same time, the switching operation can easily cause accelerated wear of the internal seals of the cylinder, or cause cylinder deformation and oil leakage due to pressure shock, which can eventually lead to cylinder damage. This not only increases equipment maintenance costs, but also reduces production efficiency due to downtime for maintenance, making it difficult to meet the needs of continuous and stable operation of industrial production.

[0005] In addition, the threaded engagement locking method of this structure requires extremely high precision in the machining of parts. After long-term use, the threads are prone to wear and stripping, which further shortens the service life of the locking device and makes it unsuitable for high-frequency, high-load filter press operation scenarios. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a locking device for the moving frame of a filter press.

[0007] To achieve the above objectives, this utility model provides the following technical solution: A filter press moving frame locking device includes: a frame, horizontal plates on the left and right sides of the frame, cylinder seats on the horizontal plates, fixed seats on the top left and right sides of the cylinder seats, rollers on the fixed seats, the rollers contacting the horizontal plates, a main cylinder fixedly mounted in the center of the cylinder seats, auxiliary cylinders fixedly mounted on the horizontal plates on the left and right sides of the frame, the top of the telescopic rod of the auxiliary cylinders being connected and fixed to the fixed seats, a control valve block on the top of the cylinder seats, a drag chain on the top of the fixed seat on the left side of the top of the cylinder seats, a rotating shaft on the front side of the fixed seats on the left and right sides of the top of the cylinder seats, a locking rod movably connected to the rotating shaft, hydraulic cylinders symmetrically mounted on the left and right sides of the main cylinder, the top of the telescopic rod of the hydraulic cylinders being connected to the lower fixed shaft of the locking rod, and a preset locking block on the inner side of the horizontal plate; The auxiliary cylinder is used to start and drive the cylinder seat to move back and forth on the horizontal plate via rollers. The hydraulic cylinder is used to start and retract, causing the locking rod to rotate around the axis of rotation of the fixed seat to the side of the main cylinder to release the lock. The hydraulic cylinder is used to start and extend, causing the locking rod to rotate around the axis of rotation of the fixed seat to the side away from the main cylinder, thereby cooperating with the locking block to achieve locking.

[0008] Preferably, the control valve block is connected to the main oil cylinder and hydraulic cylinder pipeline, and the pipeline is connected to the external pump station via a cable chain. A first-end valve block is provided on the rear side of the frame, and the first-end valve block is connected to the auxiliary oil cylinder pipeline, which is connected to the external pump station.

[0009] Preferably, a communication connector is provided on the top of the cylinder seat. The communication connector is electrically connected to the control valve block, which is used to control the start and stop of the main cylinder and the hydraulic cylinder.

[0010] Preferably, the main cylinder is used to press the filter plates of the filter press after the cylinder seat reaches the preset position and locks.

[0011] Compared with the prior art, the present invention provides a locking device for the moving frame of a filter press, which has the following advantages: The top of the telescopic rod of the hydraulic cylinder is movably connected to the fixed shaft at the bottom of the locking rod. This connection method enables flexible force transmission and avoids stress concentration problems caused by rigid connections.

[0012] When the hydraulic cylinder extends, its telescopic rod smoothly pushes the locking rod to rotate around the fixed base shaft, so that the locking rod precisely fits the preset locking block on the inner side of the horizontal plate to form a tight lock; when the hydraulic cylinder retracts, it can simultaneously drive the locking rod to reset to the main cylinder side, and the unlocking action is smooth and without jamming.

[0013] The entire process does not rely on complex transmission structures such as threaded engagement. The locking position accuracy is directly guaranteed by the rotation trajectory of the locking rod and the preset position of the locking block, which effectively avoids the locking failure problem caused by thread wear and stripping in the existing technology and improves the working reliability of the locking device.

[0014] Driven by the hydraulic cylinder, the locking rod and locking block work together to form a rigid lock, effectively resisting the reaction force generated when the main cylinder squeezes the filter plate, preventing displacement or shaking of the cylinder seat. Compared to the loosening problem caused by vibration in existing threaded engagement, this device uses the continuous and stable thrust output of the hydraulic cylinder to keep the locking rod in a tight fit with the locking block, ensuring that the cylinder seat remains in a constant position during filtration, providing a stable squeezing environment for the filter plate, thereby ensuring the filtration efficiency of the filter press and the moisture content of the filter cake meet the standards, and improving product quality. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the planar structure on the right side of this utility model; Figure 3 This is a partial top view of the planar structure of this utility model; Figure 4 This is a schematic diagram of the side planar structure of this utility model.

[0016] The components include: 1. Cylinder seat; 101. Main cylinder; 102. Hydraulic cylinder; 103. Locking rod; 2. Frame; 201. Auxiliary cylinder; 3. Cable chain; 4. Control valve block; 5. Communication connector block. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Reference Figures 1-4 As shown in the figure, a filter press moving frame locking device of this embodiment includes a frame 2. Horizontal plates are bolted to the left and right sides of the frame 2. These horizontal plates serve as support for the movement of the hydraulic cylinder seat. Their surfaces are milled to ensure flatness, providing a foundation for the stable operation of subsequent components. A hydraulic cylinder seat 1 is movably mounted on the horizontal plate. Fixed seats are bolted to the top left and right sides of the hydraulic cylinder seat 1. Rollers are mounted on the bottom of the fixed seats via deep groove ball bearings. The rollers make rolling contact with the surface of the horizontal plate. This contact method converts sliding friction into rolling friction, significantly reducing the resistance when the hydraulic cylinder seat 1 moves, ensuring that the hydraulic cylinder seat 1 moves along the horizontal plate without jamming.

[0019] The center of the cylinder seat 1 is fixedly connected to the main cylinder 101 via a flange. The output shaft of the main cylinder 101 faces the filter plate of the filter press. After the cylinder seat 1 is locked, the main cylinder 101 can output stable pressure to squeeze the filter plate, achieving solid-liquid separation. Auxiliary cylinders 201 are also fixed to the horizontal plates on both sides of the frame 2 via bracket bolts. The top of the telescopic rod of the auxiliary cylinder 201 is bolted to the fixed seat of the cylinder seat 1. When the telescopic rod of the auxiliary cylinder 201 extends or retracts, it can drive the cylinder seat 1 to move back and forth along the horizontal plate, thereby adjusting the relative position of the main cylinder 101 and the filter plate.

[0020] A control valve block 4 is installed on the top of the cylinder seat 1. A drag chain 3 is connected to the top of the fixed seat on the left side of the top of the cylinder seat 1. The drag chain 3 has reserved space for pipes. Locking rods 103 are movably connected to the front of the fixed seats on the left and right sides of the top of the cylinder seat 1 via pins. Locking rods 103 can rotate 360° around the pins. Hydraulic cylinders 102 are symmetrically arranged on the left and right sides of the main cylinder 101. The cylinder body of the hydraulic cylinder 102 is fixed to the cylinder seat 1 by bolts. The top of the telescopic rod of the hydraulic cylinder 102 is connected to the fixed shaft at the bottom of the locking rod 103. A locking block is pre-set by welding on the inner side of the cross plate. When the hydraulic cylinder 102 starts to extend, the telescopic rod pushes the locking rod 103 to rotate away from the main cylinder 101 around the axis of rotation of the fixed seat until the locking rod 103 engages with the locking block, thus locking the cylinder seat 1. When the hydraulic cylinder 102 retracts, the telescopic rod pulls the locking rod 103 to reset, releasing the locked state.

[0021] In addition, the control valve block 4 is connected to the main oil cylinder 101 and the hydraulic cylinder 102 via high-pressure oil pipes. The oil pipes are run inside the drag chain 3 and connected to an external pump station. The drag chain 3 can move and extend synchronously with the oil cylinder seat 1 to avoid the oil pipes from getting tangled or worn. The rear side of the frame 2 is fixed with a first-end valve block by a bracket. The first-end valve block is connected to the auxiliary oil cylinder 201 via a high-pressure oil pipe. A communication power connector 5 is also fixed on the top of the oil cylinder seat 1. The communication power connector 5 is electrically connected to the control valve block 4 via a shielded wire. The communication power connector 5 can receive external control signals and transmit them to the control valve block 4. The control valve block 4 precisely controls the start and stop of the main oil cylinder 101 and the hydraulic cylinder 102 to ensure the coordination of locking and squeezing actions.

[0022] The working principle of this utility model is as follows: When using this filter press moving frame locking device, the initial debugging and connection preparation of the device must be completed first: fix the frame 2 in the preset installation position of the filter press, check the flatness of the horizontal plates on the left and right sides of the frame 2, and ensure that the horizontal plates are not deformed or protruding; then connect the hydraulic pipeline of the external pump station to the control valve block 4 on the top of the cylinder seat 1 and the first end valve block on the rear side of the frame 2 respectively. The hydraulic pipeline needs to be stored inside the drag chain 3 to avoid the pipeline being exposed and worn; at the same time, connect the external control circuit to the communication connector 5 on the top of the cylinder seat 1, and transmit signals to the control valve block 4 through the communication connector 5 to test the start and stop control function of the control valve block 4 on the main cylinder 101 and the hydraulic cylinder 102, as well as the control response of the first end valve block on the auxiliary cylinder 201, to ensure that the electrical and hydraulic connections of each component are normal.

[0023] When the device enters the working state, the auxiliary cylinder 201 is started first. The external pump station supplies hydraulic oil to the auxiliary cylinder 201 through the first-end valve block. The telescopic rod of the auxiliary cylinder 201 extends and retracts accordingly. Since the top of the telescopic rod is connected and fixed to the fixed seat of the cylinder seat 1, the movement of the telescopic rod will drive the cylinder seat 1 to move back and forth along the horizontal plate. At this time, the roller at the bottom of the fixed seat is in rolling contact with the surface of the horizontal plate, which can greatly reduce the frictional resistance when the cylinder seat 1 moves, so that the cylinder seat 1 moves smoothly to the preset position corresponding to the filter plate of the filter press. The position signal fed back by the communication connector 5 is received to determine whether the cylinder seat 1 has reached the target position. After confirmation, the movement of the auxiliary cylinder 201 is stopped.

[0024] Next, the hydraulic cylinder 102 is activated to complete the locking process. A locking signal is sent to the control valve block 4 via the communication connector 5. The control valve block 4 then supplies hydraulic oil to the hydraulic cylinder 102, pushing the extension rod of the hydraulic cylinder 102 to extend. Since the top of the extension rod of the hydraulic cylinder 102 is connected to the fixed shaft at the lower part of the locking rod 103, when the extension rod extends, it applies a thrust to the locking rod 103 through the fixed shaft structure, causing the locking rod 103 to rotate around the rotation axis on the front side of the fixed seat away from the main cylinder 101 until the locking rod 103 is tightly engaged with the locking block preset on the inner side of the cross plate. During this process, the connection between the hydraulic cylinder 102 and the fixed shaft of the locking rod 103 enables flexible force transmission, avoiding stress concentration caused by rigid connections. At the same time, it does not rely on complex structures such as threaded engagement. The locking position accuracy is directly guaranteed by the rotation trajectory of the locking rod 103 and the preset position of the locking block, effectively preventing locking failure caused by thread wear and stripping.

[0025] After the cylinder seat 1 is locked, the main cylinder 101 is started to perform the filter plate extrusion operation. The control valve block 4 supplies high-pressure hydraulic oil to the main cylinder 101, and the output shaft of the main cylinder 101 extends towards the filter plate of the filter press and applies extrusion pressure. At this time, the hydraulic cylinder 102 keeps the telescopic rod extended, and applies a stable thrust to the locking block through the locking rod 103, so that the locking rod 103 and the locking block always maintain a rigid locking state with a tight fit. This locking structure can effectively resist the reaction force generated when the main cylinder 101 extrudes the filter plate, prevent the cylinder seat 1 from shifting or shaking due to the reaction force, ensure that the position of the cylinder body is constant, provide a stable extrusion environment for the filter plate, and thus ensure that the filtration efficiency of the filter press and the moisture content of the filter cake meet the standards.

[0026] After the filter plate extrusion operation is completed, the unlocking and resetting must be completed in sequence. First, the operation of the main cylinder 101 is stopped by the control valve block 4, and the output shaft of the main cylinder 101 retracts and resets. Then, an unlocking signal is sent to the control valve block 4, and the control valve block 4 switches the oil circuit direction of the hydraulic cylinder 102, causing the telescopic rod of the hydraulic cylinder 102 to retract. The telescopic rod pulls the locking rod 103 to rotate around the axis of the main cylinder 101 through the fixed shaft structure until the locking rod 103 separates from the locking block and the locking state is released. Finally, the auxiliary cylinder 201 is started again, causing the telescopic rod of the auxiliary cylinder 201 to move in the opposite direction, driving the cylinder seat 1 to retract along the horizontal plate to the initial position, completing one operation cycle.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A filter press mobile frame locking device, characterized in that, include: A frame (2) is provided with horizontal plates on the left and right sides. A cylinder seat (1) is provided on the horizontal plates. Fixed seats are provided on the top left and right sides of the cylinder seat (1). Rollers are provided on the fixed seats and the rollers are in contact with the horizontal plates. A main cylinder (101) is fixedly provided in the center of the cylinder seat (1). Auxiliary cylinders (201) are fixedly provided on the horizontal plates on the left and right sides of the frame (2). The top of the telescopic rod of the auxiliary cylinder (201) is connected and fixed to the fixed seat. A control valve block (4) is provided on the top of the cylinder seat (1). A drag chain (3) is provided on the top of the fixed seat on the left side of the top of the cylinder seat (1). A rotating shaft is provided on the front side of the fixed seat on the left and right sides of the top of the cylinder seat (1). A locking rod (103) is movably connected to the rotating shaft. Hydraulic cylinders (102) are symmetrically arranged on the left and right sides of the main cylinder (101). The top of the telescopic rod of the hydraulic cylinder (102) is connected to the lower fixed shaft of the locking rod (103). A preset locking block is provided on the inner side of the horizontal plate. The auxiliary cylinder (201) is used to start and drive the cylinder seat (1) to move back and forth on the horizontal plate via rollers. The hydraulic cylinder (102) is used to start and retract to drive the locking rod (103) to rotate around the axis of the fixed seat to the side of the main cylinder (101) to release the lock. The hydraulic cylinder (102) is used to start and extend to drive the locking rod (103) to rotate around the axis of the fixed seat to the side away from the main cylinder (101), thereby cooperating with the locking block to achieve locking.

2. The filter press mobile frame locking device according to claim 1, characterized in that, The control valve block (4) is connected to the main oil cylinder (101) and hydraulic cylinder (102) via pipelines. The pipelines are connected to the external pump station via drag chain (3). The rear side of the frame (2) is equipped with a first end valve block, which is connected to the auxiliary oil cylinder (201) via pipelines. The pipelines are connected to the external pump station.

3. The filter press mobile frame locking device according to claim 1, characterized in that, A communication connector (5) is provided on the top of the cylinder seat (1). The communication connector (5) is electrically connected to the control valve block (4). The control valve block (4) is used to control the start and stop of the main cylinder (101) and the hydraulic cylinder (102).

4. The filter press mobile frame locking device according to claim 1, characterized in that, The main cylinder (101) is used to start the main cylinder (101) to squeeze the filter plate of the filter press after the cylinder seat (1) reaches the preset position and is locked.

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