A plate-and-frame mud filter press with a filter plate unloading mechanism

Abstract

The present invention discloses a plate-and-frame mud filter press with a filter plate unloading mechanism, comprising a frame and a plurality of plate frames spaced apart on the frame; the cavity of the plate frame is divided into a filter press chamber and a clean water chamber by vertical filter plates; the filter press chambers of adjacent plate frames are each provided with a foldable unloading mechanism, the lower end of the foldable unloading mechanism being hinged to the filter plate, and the other end being hinged to a slider in a slide groove of a top plate of the plate frame; a connecting rod being fixedly provided at the front end of the slider, and the connecting rod extending horizontally to and being fixed on the opposite plate frame. The advantages of the present invention are: the plate-and-frame mud filter press has a simple structure and is easy to operate; by providing an unloading mechanism between the plate frames that can be bent as the plate frames separate or merge, the dehydrated and compacted mud cake can be quickly unloaded from the plate frames.

Description

Technical Field

[0001] The invention belongs to the technical field of filter press equipment, and in particular relates to a plate-and-frame mud filter press with a filter plate auxiliary unloading mechanism. Background Art

[0002] Slurry shield technology stabilizes the excavation face by applying pressurized mud or slurry. As the shield advances, the soil and sand cut off by the rotating cutterhead are stirred by a mixing device to form a high-concentration slurry, which is then transported to the surface slurry separation system using fluid conveying. Currently, a plate-and-frame filter press is commonly used to separate high-concentration slurry. This filter press squeezes the slurry. Due to the squeezing action of the adjacent plates and frames, the water in the slurry is squeezed out and collected, while the sludge in the slurry is squeezed into the cavities of the plates and frames to form a mud cake. The squeezed mud cake adheres to the plates and frames and is difficult to remove, requiring manual removal by construction workers, which is tedious, time-consuming, and labor-intensive. Summary of the Invention

[0003] The object of the present invention is to provide a plate-and-frame mud filter press with a filter plate unloading mechanism in response to the above-mentioned deficiencies in the prior art. The mud filter press is equipped with foldable unloading mechanisms in the cavities of adjacent plate frames, and the separation between the plate frames drives the steel mesh frame in the foldable unloading mechanism to bend, thereby unloading the mud cake from the inner wall surface of the plate frame.

[0004] The purpose of the present invention is achieved by the following technical solutions:

[0005] A plate and frame type mud filter press with a filter plate unloading mechanism, characterized in that the plate and frame type mud filter press comprises a frame and a plurality of plate frames arranged at intervals on the frame; the cavity of the plate frame is divided into a filter press chamber and a clean water chamber by vertical filter plates; the filter press chambers of adjacent plate frames are provided with foldable unloading mechanisms, the lower end of the foldable unloading mechanism is hinged to the filter plate, and the other end is hinged to a slider in the slide groove of the plate frame top plate, the front end of the slider is fixed with a connecting rod, and the connecting rod extends horizontally to the opposite plate frame and is fixed.

[0006] The foldable unloading aid mechanism includes a first steel wire mesh frame and a second steel wire mesh frame hinged to each other, the first steel wire mesh frame is vertically arranged along the filter plate, and the second steel wire mesh frame is horizontally arranged along the top plate of the plate frame. The lower end of the first steel wire mesh frame is hinged to the filter plate, and the upper end is hinged to the rear end of the second steel wire mesh frame, and the front end of the second steel wire mesh frame is hinged to the slider in the slide groove.

[0007] The first steel wire mesh frame and the second steel wire mesh frame are both formed by welding four steel bars to form a rectangular frame, and steel wire mesh is welded in the rectangular frame.

[0008] The height of the first steel wire mesh frame is not less than 1 / 5 of the height of the plate frame.

[0009] The bottom of the plate frame is also symmetrically provided with the foldable unloading aid mechanism.

[0010] A spring is provided between the front end surface of the slider and the front end inner wall surface of the sliding groove.

[0011] The frame includes a base, a slide rail arranged on the base, a hydraulic pushing structure arranged at one end of the slide rail, and a thrust plate arranged at the other end of the slide rail. An outwardly protruding support frame is provided on the two outer side walls of each plate frame, and the plate frame can be slidably installed on the slide rail through the support frame.

[0012] Each of the plate frames is arranged longitudinally along the slide rail, the ones located at both ends are end plate frames, and the one located between the two end plate frames is a standard plate frame; the cavity of the end plate frame is divided into a filter press cavity and a clean water cavity by the filter plate; the cavity of the standard plate frame is divided into a filter press cavity, a clean water cavity, and a filter press cavity by two filter plates arranged at intervals; a grouting pipe and a clean water outflow pipe are respectively provided on the side walls of the plate frame, the grouting pipe is connected to the filter press cavity, and the clean water outflow pipe is connected to the clean water cavity.

[0013] The advantages of the present invention are: the plate-and-frame mud filter press has a simple structure and is easy to operate; by arranging an auxiliary unloading mechanism between the plates and frames that can bend as the plates and frames separate or merge, the dehydrated and compacted mud cake can be quickly unloaded from the plates and frames. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the plate and frame mud filter press of the present invention;

[0015] Figure 2 For the present invention Figure 1 aa sectional view in;

[0016] Figure 3 This is a schematic diagram of the local structure of the present invention when adjacent plates and frames are pressed tightly;

[0017] Figure 4 It is a schematic diagram of the local structure when adjacent plates and frames are compressed and slurry is injected in the present invention. DETAILED DESCRIPTION

[0018] The features of the present invention and other related features are further described in detail below through embodiments in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art:

[0019] like Figure 1-4, the marks in the figure are: plate frame 1, support frame 2, slide rail 3, clean water outflow pipe 4, water collecting trough 5, base 6, grouting pipe 7, thrust plate 8, push plate 9, hydraulic push mechanism 10, rear seat plate 11, second steel wire mesh 12, first steel wire mesh 13, filter press chamber 14, clean water chamber 15, filter plate 16, mud cake 17.

[0020] Example: Figure 1-4 As shown, the present embodiment specifically relates to a plate-and-frame mud filter press with a filter plate unloading mechanism, the plate-and-frame mud filter press comprises a frame and a plurality of plate frames 1 arranged on the frame at intervals along the longitudinal direction, the plate frame 1 is divided into at least a filter press chamber 14 and a clean water chamber 15 by vertically arranged filter plates 16, and a foldable unloading mechanism is provided on the top and bottom portions of the filter press chamber 14 of adjacent plate frames 1, the lower end of the foldable unloading mechanism is hinged to the filter plate 16, and the upper end is hinged to a slider in a slide groove on the top plate or bottom plate of the plate frame 1, a connecting rod is fixedly provided at the front end of the slider and the connecting rod extends to and is fixed to the opposite plate frame 1, and as the plate frames 1 merge or disengage with each other, the foldable unloading mechanism can bend accordingly to drive the compacted mud cake 17 to be unloaded from the plate frame 1.

[0021] like Figure 1-4 As shown, in this embodiment, the frame includes a base 6, on which two slide rails 3 are arranged in parallel along the longitudinal direction, and a number of plate frames 1 are arranged at intervals along the longitudinal direction between the two slide rails 3. Support frames 2 are provided on the two side walls of each plate frame 1, and the support frames 2 are matched and installed on the slide rails 3 to realize the sliding of each plate frame 1 on the slide rails 3. A thrust plate 8 is installed at one end of the slide rail 3 to provide a limit thrust for the plate frame 1 subjected to the jacking action; a hydraulic jacking mechanism 10 is installed at the other end of the slide rail 3. The hydraulic jacking mechanism 10 adopts one or more hydraulic jacks, and a jacking plate 9 is fixed at the front end thereof. The large-area jacking plate 9 can be used to push the plate frame 1 evenly and steadily, and a rear seat plate 11 is fixed at the rear end thereof. The rear seat plate 11 is fixed on the base 6 and can provide a reaction force foundation for the hydraulic jacking mechanism 10.

[0022] like Figure 1-2 As shown, the longitudinally arranged panel frames 1 are divided into two types: those at the ends are end panel frames, and those arranged between the two end panel frames are standard panel frames. The end panel frames at the front are fixed to the thrust plate 8, and the end panel frames at the rear are fixed to the push plate 9. The hydraulic push mechanism 10 pushes or retracts the panel frames 1, which can move forward and backward on the slide rail 3.

[0023] like Figure 1-4As shown, the main body of the end plate frame is composed of four steel plates, one on top, one on the bottom, one on the left, and one on the right, forming a rectangular frame. End plate seals are installed on the end face where the end plate frame is fixed to the thrust plate 8 or the top thrust plate 9, while the other end face is open. A filter plate 16 is vertically installed in the cavity of the end plate frame to separate the cavity into a filter press chamber 14 and a clean water chamber 15. The filter plate 16 has the function of filtering the mud and preventing the mud from flowing out of the clean water. The side walls of the end plate frame are respectively provided with a grouting pipe 7 and a clean water outflow pipe 4. The grouting pipe 7 is connected to the aforementioned filter press chamber 14 to input the mud. The clean water outflow pipe 4 is connected to the clean water chamber 15 to discharge the clean water after the filter press into the water collection tank 5 provided below the clean water outflow pipe 4.

[0024] like Figure 1-4 As shown, the main body of the standard plate frame is also formed by splicing four steel plates at the top, bottom, left and right to form a rectangular frame, with its two end faces open. Two vertical filter plates 16 are arranged in its cavity to divide its cavity into a filter press chamber 14, a clean water chamber 15, and a filter press chamber 14, totaling three chambers. Grouting pipes 7 and clean water outflow pipes 4 are respectively arranged on the side walls of the standard plate frame. The grouting pipe 7 is connected to the aforementioned filter press chamber 14 for inputting mud, and the clean water outflow pipe 4 is connected to the clean water chamber 15 for discharging the clean water filtered out into the water collection tank 5 provided below the clean water outflow pipe 4. According to actual needs, in the filter press chamber formed by splicing the standard plate frame and the end plate frame, or in the filter press chamber formed by splicing two standard plate frames, it is sufficient to ensure that there is a grouting pipe 7 connected.

[0025] like Figure 1-4As shown, the top and bottom of the filter press chamber 14 of each plate frame 1 are respectively provided with a foldable unloading aid mechanism, and the foldable unloading aid mechanism provided at the top is used for explanation here. The foldable unloading aid mechanism includes a first steel wire mesh frame 13 and a second steel wire mesh frame 12 hinged to each other. The steel wire mesh frames here are all welded by four steel bars to form a rectangular frame, and the steel mesh is welded and arranged in the rectangular frame; wherein, the first steel wire mesh frame 13 is vertically arranged against the filter plate 16, and the second steel wire mesh frame 12 is horizontally arranged against the inner wall surface of the top plate of the plate frame 1. The lower end of the first steel wire mesh frame 13 is hinged to the filter plate 16, and the upper end extends to the top of the plate frame 1 and is hinged to the rear end of the second steel wire mesh frame 12; a slide groove is fixed on the inner wall surface of the top plate of the plate frame 1, and the slide groove has a certain length. The slider drives the front end of the second steel wire mesh frame 12 to slide. The front end of the second steel wire mesh frame 12 is hinged with the slider. A connecting rod is fixed to the front end of the slider. The front end of the connecting rod extends outward and is fixed to the opposite plate frame 1. The connecting rod can be a rigid metal rod or a flexible rope. Its main function is to pull the slider to slide and then drive the second steel wire mesh frame 12 and the first steel wire mesh frame 13 to fold when the two adjacent plate frames 1 are separated from each other. In addition, a spring is provided between the front end of the slider and the front end inner wall of the slide groove. The spring can drive the slider to reset after being pulled. It should be noted that in this embodiment, the height of the first steel wire mesh frame 13 is 1 / 4 of the height of the plate frame 1. According to actual conditions, a larger height can also be selected.

[0026] like Figure 1-4 As shown, the working method of the plate-and-frame mud filter press with the filter plate unloading aid mechanism in this embodiment includes the following steps:

[0027] (1) If Figure 1-3 As shown, in the initial state, each plate frame 1 is spaced a certain distance apart, and each plate frame 1 is pushed tightly together by the hydraulic pushing mechanism 10 and the pushing plate 9. During the pushing process, the connecting rod between adjacent plate frames 1 pushes the slider toward the filter plate 16. During the movement, the slider resets the first steel wire mesh frame 13 and the second steel wire mesh frame 12. At this time, the two are at right angles, and the first steel wire mesh frame 13 is vertically abutted against the filter plate 16, and the second steel wire mesh frame 12 is horizontally abutted against the inner wall of the top plate of the plate frame 1.

[0028] (2) If Figure 4 As shown, mud is injected into the filter press chamber 14 through the grouting pipe 7. The grouting pipe 7 has a high pressure when injecting mud. As the pressure gradually increases, the water in the mud is filtered out from the filter plate 16 and enters the clean water chamber 15, and flows out through the clean water outflow pipe 4 and flows into the water collecting tank 5 for collection; finally, a mud cake 17 is formed in the filter press chamber 14, and the filter press is completed.

[0029] (3) After the filtration is completed and the mud cake 17 is formed, the hydraulic pushing mechanism 10 is controlled to retract to drive the plate frames 1 to separate from each other. The high pressure in the filtration makes the mud cake 17 tightly adhere to the inner wall surface of the plate frame 1; as the plate frames 1 separate from each other, the connecting rod on the standard plate frame pulls the slider in the end plate frame to move away from the filter plate 16, thereby driving the first steel wire mesh frame 13 and the second steel wire mesh frame 12 to bend, so that the mud cake 17 and the filter plate 16 fall off from each other; similarly, the connecting rod 20 on the end plate frame will also pull the slider on the standard plate frame to move away from the filter plate 16, thereby driving the first steel wire mesh frame 13 and the second steel wire mesh frame 12 to bend, so that the mud cake 17 and the filter plate 16 fall off from each other.

[0030] The beneficial effects of this embodiment are: the plate and frame mud filter press has a simple structure and is easy to operate. By arranging an auxiliary unloading mechanism between the plates and frames that can bend as the plates and frames separate or merge, the dehydrated and compacted mud cake can be quickly unloaded from the plates and frames.

Claims

1. A plate and frame mud filter press with a filter plate unloading mechanism, characterized in that The plate-and-frame mud filter press comprises a frame and a plurality of plate frames spaced apart on the frame; the cavity of the plate frame is divided into a filter press chamber and a clean water chamber by vertical filter plates; a foldable unloading mechanism is provided in the filter press chamber of adjacent plate frames, the lower end of the foldable unloading mechanism being hinged to the filter plate and the other end being hinged to a slider in a slide groove of the plate frame top plate, a connecting rod being fixedly provided at the front end of the slider and the connecting rod extending horizontally to and being fixed on the opposite plate frame; The foldable unloading aid mechanism includes a first steel wire mesh frame and a second steel wire mesh frame hinged to each other, the first steel wire mesh frame is vertically arranged along the filter plate, and the second steel wire mesh frame is horizontally arranged along the top plate of the plate frame. The lower end of the first steel wire mesh frame is hinged to the filter plate, and the upper end is hinged to the rear end of the second steel wire mesh frame, and the front end of the second steel wire mesh frame is hinged to the slider in the slide groove.

2. A plate-and-frame filter press with a filter plate unloading mechanism according to claim 1, characterized in that The first steel wire mesh frame and the second steel wire mesh frame are both formed by welding four steel bars to form a rectangular frame, and steel wire mesh is welded in the rectangular frame.

3. The plate-and-frame filter press with a filter plate unloading aid according to claim 1, characterized in that The height of the first steel wire mesh frame is not less than 1 / 5 of the height of the plate frame.

4. A plate-and-frame filter press with a filter plate unloading aid according to claim 1, characterized in that The bottom of the plate frame is also symmetrically provided with the foldable unloading aid mechanism.

5. The plate-and-frame filter press with a filter plate unloading aid according to claim 1, characterized in that A spring is provided between the front end surface of the slider and the front end inner wall surface of the sliding groove.

6. The plate-and-frame filter press with a filter plate unloading aid according to claim 1, characterized in that The frame includes a base, a slide rail arranged on the base, a hydraulic pushing structure arranged at one end of the slide rail, and a thrust plate arranged at the other end of the slide rail. An outwardly protruding support frame is provided on the two outer side walls of each plate frame, and the plate frame can be slidably installed on the slide rail through the support frame.

7. A plate-and-frame mud filter press with a filter plate unloading aid mechanism according to claim 6, characterized in that The plate frames are arranged longitudinally along the slide rail, the ones located at both ends are end plate frames, and the one located between the two end plate frames is a standard plate frame; the cavity of the end plate frames is divided into a filter press cavity and a clean water cavity by the filter plates; the cavity of the standard plate frame is divided into a filter press cavity, a clean water cavity, and a filter press cavity by two filter plates arranged at intervals; A grouting pipe and a clean water outflow pipe are respectively provided on the side wall surfaces of the plate frame. The grouting pipe is connected to the filter press cavity, and the clean water outflow pipe is connected to the clean water cavity.

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