Vacuum filtering device

Abstract

The utility model relates to the technical field of drilling fluid filtering, and discloses a vacuum filtering device which comprises a filtering box, the filtering assembly comprises a filtering plate, a pressing frame, a labyrinth channel and a limiting protrusion, the filtering plate is fixedly connected with the filtering box and forms a plate-shaped structure with permeation holes, filtering cloth is laid on the top of the filtering plate, the pressing frame is elastically connected with the filtering plate, the labyrinth channel is formed in the wall face of the filtering plate, and the limiting protrusion and the pressing frame are fixedly installed; the limiting protrusions can be clamped into the maze channel to press the filter cloth, the limiting protrusions are clamped into the maze channel, so that the filter cloth is pressed into the maze channel by the limiting protrusions, fold-line-shaped folds are formed, and the maze-shaped maze channel is matched with the limiting protrusions, so that in the process that the filter cloth is pressed and fixed by the pressing frame, the filter cloth is not folded. The edge position of the filter cloth can be stressed more uniformly and is not easy to tear during suction filtration, so that the filtering effect of the filter cloth on filtrate is guaranteed, and the probability that the filtrate seeps downwards from the damaged position of the filter cloth is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling fluid filtration, in particular to a vacuum filtration device. Background Art

[0002] In oil drilling operations, the drilling fluid needs to be recycled and reused. In order to remove the solid particles mixed in the liquid, the drilling fluid needs to be filtered.

[0003] The prior art discloses a drilling fluid vacuum filter box (publication number: CN215332734U), which includes a filter box body and a vacuum pipeline. A vacuum filter plate is provided at the upper end of the filter box body, and the vacuum filter plate is provided with filter plate meshes. A vacuum screening and filtering device is used to separate the solid and liquid of the drilling fluid and the river pond sludge, which can improve the drilling fluid and cuttings separation efficiency, reduce the water content of the solid phase, and absorb harmful gases and volatiles, which is beneficial to environmental protection, optimizes the structure of the vacuum filter plate, and ensures the effect of vacuum screening and filtering.

[0004] The existing technology mainly realizes the separation of solid and liquid through filter plates. The solids in the drilling fluid are stored above the filter plates, and the filtrate seeps out and is extracted. The filter residue on the filter plates needs to be cleaned regularly to ensure the filtering effect of the filter plates. The filter cloth is laid on a flat filter plate and pressed by a pressure frame fastened with bolts. The edge position of the filter cloth is limited by the friction between the pressure frame and the filter plate. During the vacuuming process, due to the pressure difference, the filter cloth will produce a certain deformation, and part of the filter cloth will be sucked into the filter hole. At this time, the edge position of the filter cloth is subjected to greater force, which is easy to slip and affect the filtering effect of the filter cloth.

[0005] To this end, we propose a vacuum filtration device. Utility Model Content

[0006] The utility model mainly solves the technical problem that the limiting effect of the above-mentioned filter cloth is not good, and provides a vacuum filtering device.

[0007] In order to achieve the above purpose, the utility model adopts the following technical scheme, a vacuum filtration device, comprising:

[0008] The filter box has a box structure with a top cover, a feed pipe for feeding is fixedly installed on the top of the filter box, and a discharge pipe for discharging is fixedly installed on the bottom of the filter box, and the discharge pipe is connected to the vacuum pumping equipment;

[0009] A filter assembly is arranged in a filter box cavity and is used to filter the liquid fed into it. The filter assembly includes a filter plate, a pressure frame, a labyrinth channel and a limiting protrusion. The filter plate is fixedly connected to the filter box, the filter plate forms a plate-like structure with penetration holes, a filter cloth is laid on the top of the filter plate, the pressure frame is elastically connected to the filter plate, a labyrinth channel is provided on the wall surface of the filter plate, the limiting protrusion is fixedly installed with the pressure frame, the limiting protrusion can be inserted into the labyrinth channel to press the filter cloth, the labyrinth channel forms a closed bending channel and causes the filter cloth to form curved folds in the labyrinth channel.

[0010] As a preferred embodiment of the present invention, the filter assembly further comprises a telescopic member, which is fixedly arranged at the bottom of the filter plate and is used to pull the pressing frame closer to the filter plate.

[0011] As a preferred embodiment of the utility model, the telescopic part includes a cylinder and a sliding rod, the sliding rod is slidably connected to the cylinder, a tension spring is fixedly installed in the cylinder, the tension spring is fixedly connected to the sliding rod, the tension rod passes through the filter plate and is fixedly connected to the bottom of the pressure frame, and the cylinder is fixedly connected to the bottom of the filter plate.

[0012] As a preferred embodiment of the present invention, the limiting protrusion is located at the bottom of the pressing frame, and the limiting protrusion and the pressing frame are integrally formed.

[0013] As a preferred embodiment of the utility model, the maze channel forms a groove with the same cross-sectional shape as the limiting protrusion, the size of the maze channel is larger than the size of the limiting protrusion, and a gap is formed when the limiting protrusion is inserted into the maze channel. The cross-section of the maze channel is rectangular, and the opening trajectory of the maze channel is a broken line.

[0014] As a preferred embodiment of the utility model, the filter assembly also includes a cross bar and a through groove, the cross bar is rotatably connected to the sliding rod of the telescopic member, a circular hole is opened on the wall surface of the pressure frame, the through groove is opened at the top of the pressure frame and is connected to the circular hole, and the cross bar can pass through the through groove and extend to the top of the pressure frame.

[0015] As a preferred embodiment of the utility model, the cross bar forms a rectangular block structure, the through groove is a rectangular groove and the through groove passes through the pressure frame, the sliding rod of the telescopic part passes through the circular hole and extends to the top of the pressure frame, and a rectangular limiting groove is provided on the top surface of the pressure frame. The cross bar passes through the through groove and is rotated to be inserted into the limiting groove.

[0016] Beneficial Effects

[0017] The utility model provides a vacuum filtering device, which has the following beneficial effects:

[0018] 1. This vacuum filtering device, by providing an elastically connected pressing frame, uses the pressing frame to press the filter cloth close to the filter plate to achieve the limitation of the filter cloth, and the limiting protrusion is stuck in the maze channel, so that the filter cloth is pressed into the maze channel by the limiting protrusion and forms folds in a zigzag shape. Through the cooperation of the maze-shaped maze channel and the limiting protrusion, the edge position of the filter cloth can be more evenly stressed during the process of being pressed and fixed by the pressing frame. During the filtration, the edge position of the filter cloth is not easy to tear, thereby ensuring the filtering effect of the filter cloth on the filtrate and reducing the probability of the filtrate seeping from the damaged position of the filter cloth. At the same time, the fit between the filter cloth, the filter plate and the pressing frame is ensured, and the water sealing effect is improved.

[0019] 2. This vacuum filtering device, by setting a telescopic part, the telescopic part includes an elastic telescopic rod but is not limited to the elastic telescopic rod, and pulls the pressure frame to contact the filter plate through the sliding rod to achieve compression and filtration of the filter cloth, which is convenient for replacing and removing the filter cloth, simplifying the subsequent maintenance steps, and facilitating maintenance.

[0020] 3. This vacuum filtering device is provided with a cross bar and a through groove. When the pressure frame is pulled by the telescopic part to fit the filter plate, the cross bar is rotated 90 degrees and falls into the limiting groove. Then, the misalignment of the cross bar and the through groove can provide a stable downward pulling force for the pressure frame. The cross bar can also be rotated to be parallel to the through groove, so that the pressure frame can be pulled up, thereby realizing the removal of the pressure frame and facilitating the replacement or laying of the filter cloth. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is one of the overall three-dimensional diagrams of the utility model;

[0022] Figure 2 This is the second overall stereogram of the utility model;

[0023] Figure 3 This is a schematic diagram of the internal structure of the filter box of the utility model;

[0024] Figure 4 This is a three-dimensional diagram of the filter assembly of the utility model;

[0025] Figure 5 A schematic diagram of a maze channel provided on the filter plate of the utility model;

[0026] Figure 6 This is a schematic diagram of the limit protrusion for installing the press frame;

[0027] Figure 7 This is a schematic diagram of the installation of the crossbar and telescopic parts.

[0028] Legend: 10, filter box; 11, feed pipe; 12, discharge pipe; 20, filter plate; 21, pressure frame; 22, labyrinth passage; 23, limiting protrusion; 24, telescopic part; 25, cross bar; 26, through slot. DETAILED DESCRIPTION

[0029] A vacuum filtration device, such as Figure 1 and Figure 2 As shown, including:

[0030] The filter box 10 has a box structure with a top cover, a feed pipe 11 for feeding is fixedly installed on the top of the filter box 10, and a discharge pipe 12 for discharging is fixedly installed on the bottom of the filter box 10, and the discharge pipe 12 is connected to a vacuum device, wherein the vacuum device can be a vacuum pump or a centrifugal fan, and the specific model and specification are not described in detail here;

[0031] like Figure 3 , Figure 4 and Figure 5 as well as Figure 6 As shown, the filter assembly is arranged in the cavity of the filter box 10 and is used to filter the liquid sent in. The filter assembly includes a filter plate 20, a pressing frame 21, a labyrinth channel 22 and a limiting protrusion 23. The filter plate 20 is fixedly connected to the filter box 10. The filter plate 20 forms a plate-like structure with permeable holes. A filter cloth is laid on the top of the filter plate 20. The pressing frame 21 is elastically connected to the filter plate 20. The wall surface of the filter plate 20 is provided with a labyrinth channel 22. The limiting protrusion 23 is fixedly installed with the pressing frame 21. The limiting protrusion 23 can be inserted into the labyrinth channel 22 to press the filter cloth. The labyrinth channel 22 forms a closed bending channel and makes the filter cloth form curved folds in the labyrinth channel 22. The limiting protrusion 23 is located at the bottom of the pressing frame 21. The limiting protrusion 23 and the pressing frame 21 are integrally formed. The labyrinth channel 22 forms a notch with the same cross-sectional shape as the limiting protrusion 23. The size of the labyrinth channel 22 is larger than the size of the limiting protrusion 23. The limiting protrusion After 23 is inserted into the labyrinth channel 22, a gap is formed. The cross-section of the labyrinth channel 22 is rectangular, and the opening trajectory of the labyrinth channel 22 is in the shape of a broken line. In this scheme, an elastically connected pressing frame 21 is provided, and the pressing frame 21 is used to press the filter cloth close to the filter plate 20 to achieve the limitation of the filter cloth, and the limiting protrusion 23 is inserted into the labyrinth channel 22, so that the filter cloth is pressed into the labyrinth channel 22 by the limiting protrusion 23 and forms a broken line fold. Through the cooperation of the labyrinth-shaped labyrinth channel 22 and the limiting protrusion 23, the edge position of the filter cloth can be subjected to more uniform force during the process of being pressed and fixed by the pressing frame 21. During filtration, the edge position of the filter cloth is not easy to tear, thereby ensuring the filtering effect of the filter cloth on the filtrate and reducing the probability of the filtrate seeping from the damaged position of the filter cloth. At the same time, the degree of fit between the filter cloth and the filter plate 20 and the pressing frame 21 is ensured, and the water sealing effect is improved. A plurality of circular penetration holes are opened on the top of the filter plate 20 for the infiltration of the filtrate.

[0032] like Figure 6As shown, the filter assembly also includes a telescopic member 24, which is fixedly arranged at the bottom of the filter plate 20 and is used to pull the pressure frame 21 close to the filter plate 20. The telescopic member 24 includes a cylinder and a sliding rod. The sliding rod is slidably connected to the cylinder. A tension spring is fixedly installed in the cylinder, and the tension spring is fixedly connected to the sliding rod. The pull rod passes through the filter plate 20 and is fixedly connected to the bottom of the pressure frame 21. The cylinder is fixedly connected to the bottom of the filter plate 20. By setting the telescopic member 24, the telescopic member 24 includes an elastic telescopic rod but is not limited to an elastic telescopic rod. The sliding rod pulls the pressure frame 21 to contact the filter plate 20 to achieve compression and filtration of the filter cloth, which is convenient for replacing and removing the filter cloth, simplifying the subsequent maintenance steps, and facilitating maintenance.

[0033] like Figure 6 and Figure 7 As shown in the figure, the filter assembly also includes a cross bar 25 and a through groove 26. The cross bar 25 is rotatably connected to the sliding rod of the telescopic member 24. A circular hole is opened on the wall of the pressing frame 21. The through groove 26 is opened at the top of the pressing frame 21 and is connected to the circular hole. The cross bar 25 can pass through the through groove 26 and extend to the top of the pressing frame 21. The cross bar 25 forms a rectangular block structure. The through groove 26 is a rectangular groove and the through groove 26 penetrates the pressing frame 21. The sliding rod of the telescopic member 24 passes through the circular hole and extends to the top of the pressing frame 21. The top surface of the pressing frame 21 is provided with a rectangular limit groove. The cross bar 25 passes through the through groove 26 and is rotated to fit into the limiting groove. As a supplement to the above scheme, by setting the cross bar 25 and the through groove 26, when the pressing frame 21 is pulled by the telescopic member 24 to fit the filter plate 20, the cross bar 25 is rotated ninety degrees and falls into the limiting groove. Then, the misalignment of the cross bar 25 and the through groove 26 can provide a stable downward pulling force for the pressing frame 21. The cross bar 25 can also be rotated to be parallel to the through groove 26, so that the pressing frame 21 can be pulled up, thereby realizing the removal of the pressing frame 21 and facilitating the replacement or laying of the filter cloth.

[0034] The working principle of the utility model is as follows: pull up the pressing frame 21, lay the filter cloth on the top of the filter plate, loosen the pressing frame 21, use the pressing frame 21 to press the filter cloth close to the filter plate 20, and limit the filter cloth, and the limiting protrusion 23 is stuck in the maze channel 22, so that the filter cloth is pressed into the maze channel 22 by the limiting protrusion 23 and forms a broken line fold. Through the cooperation of the maze-shaped maze channel 22 and the limiting protrusion 23, the edge position of the filter cloth can be more evenly stressed during the process of being pressed and fixed by the pressing frame 21. When filtering, the edge position of the filter cloth is not easy to tear, which ensures the fit between the filter cloth and the filter plate 20 and the pressing frame 21, improves the water sealing effect, and The sliding rod pulls the pressure frame 21 to contact the filter plate 20 to achieve compression and filtration of the filter cloth. By setting the cross bar 25 and the through groove 26, when the pressure frame 21 is pulled by the telescopic member 24 to fit the filter plate 20, the cross bar 25 is rotated ninety degrees, and the cross bar 25 falls into the limiting groove. Then, the misalignment of the cross bar 25 and the through groove 26 can provide a stable downward pulling force for the pressure frame 21. The cross bar 25 can also be rotated to be parallel to the through groove 26, so that the pressure frame 21 can be pulled up to achieve the removal of the pressure frame 21 and the laying of the filter cloth. In view of the characteristics of large amount of drilling fluid and many impurities, and high consumption and replacement frequency of the filter cloth, this solution can quickly replace the filter cloth and ensure the limiting effect of the filter cloth.

[0035] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A vacuum filtration device, characterized in that: include: A filter box (10) has a box structure with a top cover, a feed pipe (11) for feeding is fixedly installed on the top of the filter box (10), a discharge pipe (12) for discharging is fixedly installed on the bottom of the filter box (10), and the discharge pipe (12) is connected to a vacuum pumping device; A filter assembly is arranged in the cavity of a filter box (10) and is used for filtering the liquid sent in. The filter assembly comprises a filter plate (20), a pressing frame (21), a labyrinth channel (22) and a limiting protrusion (23). The filter plate (20) is fixedly connected to the filter box (10). The filter plate (20) forms a plate-like structure with permeable holes. A filter cloth is laid on the top of the filter plate (20). The pressing frame (21) is elastically connected to the filter plate (20). The wall surface of the filter plate (20) is provided with a labyrinth channel (22). The limiting protrusion (23) is fixedly installed with the pressing frame (21). The limiting protrusion (23) can be inserted into the labyrinth channel (22) to press the filter cloth. The labyrinth channel (22) forms a closed curved channel and causes the filter cloth to form curved folds in the labyrinth channel (22).

2. The vacuum filtration device according to claim 1, characterized in that: The filter assembly further comprises a telescopic member (24), wherein the telescopic member (24) is fixedly arranged at the bottom of the filter plate (20) and is used to pull the pressing frame (21) closer to the filter plate (20).

3. The vacuum filtration device according to claim 2, characterized in that: The telescopic member (24) comprises a cylinder and a sliding rod, the sliding rod is slidably connected to the cylinder, a tension spring is fixedly installed in the cylinder, the tension spring is fixedly connected to the sliding rod, the tension rod passes through the filter plate (20) and is fixedly connected to the bottom of the pressure frame (21), and the cylinder is fixedly connected to the bottom of the filter plate (20).

4. The vacuum filtration device according to claim 1, characterized in that: The limiting protrusion (23) is located at the bottom of the pressing frame (21), and the limiting protrusion (23) and the pressing frame (21) are integrally formed.

5. The vacuum filtration device according to claim 1, characterized in that: The labyrinth channel (22) forms a notch with the same cross-sectional shape as the limiting protrusion (23); the size of the labyrinth channel (22) is larger than the size of the limiting protrusion (23); a gap is formed after the limiting protrusion (23) is inserted into the labyrinth channel (22); the cross-sectional shape of the labyrinth channel (22) is rectangular; and the opening trajectory of the labyrinth channel (22) is in the shape of a broken line.

6. The vacuum filtration device according to claim 1, characterized in that: The filter assembly further comprises a cross bar (25) and a through groove (26), wherein the cross bar (25) is rotatably connected to the sliding rod of the telescopic member (24), a circular hole is provided on the wall surface of the pressing frame (21), the through groove (26) is provided at the top of the pressing frame (21) and is connected to the circular hole, and the cross bar (25) can pass through the through groove (26) and extend to the top of the pressing frame (21).

7. The vacuum filtration device according to claim 6, characterized in that: The cross bar (25) forms a rectangular block structure, the through groove (26) is a rectangular groove and the through groove (26) penetrates the pressing frame (21), the sliding rod of the telescopic member (24) passes through the circular hole and extends to the top of the pressing frame (21), the top surface of the pressing frame (21) is provided with a rectangular limiting groove, and the cross bar (25) passes through the through groove (26) and is locked into the limiting groove after being rotated.

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