Mechanical locking device for sealing cavity of sludge filter press and implementation method

Abstract

The invention relates to sludge dewatering treatment equipment, in particular to a mechanical locking device for sealing a cavity of a sludge filter press and an implementation method. Two pairs of pressing plates II are symmetrically arranged on the two sides of the outer side face of the movable end plate, and the movable support is arranged in a space formed by the two pairs of pressing plates II in a sliding mode. The base plate is fixed on the transverse edge of the movable bracket; the two rows of pressing plates I are fixed to the two sides of the base plate, and the bent edges are in sliding fit with the grooves of the slope moving check blocks. Cylinder bodies of the translation push rod devices are arranged on the outer side surfaces of the movable end plates and positioned in the middle of the movable bracket; and the jacking push rod device is positioned below the inclined surface moving stop block. The inclined plane fixed stop block and the inclined plane movable stop block are matched for use, the small push rod is assisted, the position of the filter plate set is mechanically locked and fixed, a sludge cavity is always in a sealed state in the sludge injection process and the sludge squeezing process, and the output pressure of the main hydraulic cylinder is effectively reduced; the investment cost of hydraulic equipment is reduced; the sludge treatment energy consumption is reduced, and the sludge treatment cost is reduced.

Description

Technical Field

[0001] The invention relates to sludge dewatering treatment equipment, in particular to a mechanical locking device for sealing a sludge filter press chamber and an implementation method thereof. Background Art

[0002] At present, diaphragm plate and frame filter presses are widely used in the sludge treatment process of sewage treatment plants. Existing diaphragm plate and frame filter presses mostly use hydraulic systems to provide filter plate extrusion pressure during the mud injection process and the filtration process to achieve the sealing of the sludge chamber. The diaphragm plate and frame filter plate group is one of the main filter pressing components of the filter press. While squeezing water to squeeze the sludge, the main hydraulic cylinder needs to provide an extrusion pressure greater than the sum of the squeezing pressure and the sealing pressure to keep the sludge chamber in a sealed state. The output pressure of the hydraulic system is high, and the investment cost and maintenance cost of the hydraulic system are high. In addition, the hydraulic system needs to continuously provide pressure during the mud injection process and the sludge squeezing process, which consumes a lot of energy and increases the cost of sludge treatment.

[0003] At present, mechanical locking devices have become a recognized research direction for solving the above problems.

[0004] The utility model patent with the publication number CN215566987U and the invention name "A filter press oil cylinder with thread self-locking" provides a mechanical locking device with a trapezoidal thread processed on the oil cylinder piston rod, and the trapezoidal thread and the locking nut form a self-locking effect. The locking device has high requirements for thread processing accuracy, and requires the thread length to be longer than the stroke of the hydraulic cylinder during use. The long thread processing length increases the difficulty of thread processing. In actual production, it is often impossible to effectively prevent loosening because the processing accuracy does not meet the requirements; this locking device has a large friction resistance and needs to be frequently disassembled or rotated, which increases the difficulty of operation and wear, thereby reducing the service life; even if the trapezoidal thread has a certain self-locking property, the self-locking effect may be destroyed when subjected to excessive external force, and the connector will still loosen, and the use pressure is limited.

[0005] The invention patent with the publication number CN114735915 and the invention name "A filter press with a mechanical locking device" provides a mechanical locking device for a combined locking part: comprising a cylinder support frame, a pressure support member and a combined bearing plate, wherein the pressure support member is supported on the cylinder support frame and bears the reverse force of the filter press through the combined bearing plate. The mechanical locking device has a large structure, increases the frame structure of the filter press, occupies a large area, and increases the investment cost; due to the constraints of space and cost, the probability of using the locking device in actual use is relatively small. Summary of the invention

[0006] In view of the problems that the pressure of the existing diaphragm plate-frame filter press during the sludge squeezing process is provided by the main hydraulic cylinder, the hydraulic system investment and maintenance costs are high, and the production energy consumption is high, resulting in high sludge treatment costs, the present invention provides a mechanical locking device for sealing the sludge filter press chamber and an implementation method: the inclined fixed block and the inclined movable block are used in combination, and a small push rod is used to assist the left and right movement and up and down movement of the movable block, so as to achieve good cooperation between the fixed block and the movable block, and then achieve mechanical locking and fixing the position of the filter plate group, so that the sludge chamber is always in a sealed state during the sludge injection process and the sludge squeezing process. The mechanical locking device effectively reduces the output pressure of the hydraulic system and reduces the investment cost of the hydraulic equipment; it greatly shortens the working time of the main hydraulic cylinder, reduces the energy consumption of sludge treatment, and reduces the sludge treatment cost.

[0007] The technical solution of the invention is: a mechanical locking device for sealing the chamber of a sludge filter press, with the axis of the filter press as a reference, two sets of mechanical locking units are symmetrically arranged on the outer side of the movable end plate, and the mechanical locking unit includes an inclined fixed block, an inclined movable block, a pressure plate I, a pad, a movable bracket, a pressure plate II, a translation push rod device, and a tightening push rod device; two pairs of the pressure plates II are symmetrically arranged on both sides of the outer side of the movable end plate, and the pressure plates II are L-shaped structures, and each pair of pressure plates II is symmetrical up and down; the movable bracket is U-shaped and slidably arranged in the space formed by the two pairs of pressure plates II; the pad is fixed on the horizontal side of the movable bracket; the The pressure plate I is an L-shaped structure, and several pressure plates I are respectively arranged on both sides of the pad relatively, and the bent edges of the two rows of pressure plates I are slidably arranged in the groove I of the inclined surface moving block; the inclined surface fixed block is arranged on the crossbeam, and the position of the inclined surface fixed block is determined according to the sealing pressure required during mud injection, the cylinder body of the translation push rod device is arranged on the outer end surface of the moving end plate, and the telescopic rod I of the translation push rod device is arranged in the installation groove I in the middle of the bottom edge of the moving bracket; the cylinder body of the tightening push rod device is arranged on the pad and below the inclined surface moving block, and the telescopic rod II of the tightening push rod device is arranged in the installation groove II of the inclined surface moving block.

[0008] In the above technical solution, bosses are respectively arranged on the outer sides of the two symmetrical sides of the movable bracket, and a mounting groove I is arranged in the middle of the inner side of the horizontal side of the movable bracket; the inner side surfaces of the two vertical sides of the pressure plate II are respectively in sliding contact with the outer sides of the two bosses of the movable bracket.

[0009] In the above technical solution, grooves I are respectively arranged on both sides of the straight side of the inclined movable stopper, and a mounting groove II is arranged on the outer side of the middle of the bottom end of the straight side.

[0010] A method for realizing a mechanical locking device for sealing a sludge filter press chamber, wherein mechanical locking devices are symmetrically arranged on both sides of a movable end plate, and two sets of mechanical locking devices work synchronously, including two stages of locking and loosening, steps one to three are the locking stage, and steps four to six are the loosening stage, including two stages of locking and loosening, and are performed according to the following steps: Step 1: Locking preparation: The main hydraulic cylinder of the filter press pushes the mobile end plate to the position to be locked, and the sludge chamber of the diaphragm plate frame filter plate group is in a sealed state; Step 2, translation: the telescopic rod I of the translation push rod device is extended to push the mobile bracket outward to the specified position, and the pad, pressure plate I, inclined moving block, and tightening push rod device installed on the mobile bracket in sequence move together with the movement of the mobile bracket; Step 3, the inclined plane moving block is pushed up: when the moving bracket reaches the specified position, the telescopic rod II of the pressing push rod device pushes the inclined plane moving block to move upward, the inclined surface of the inclined plane moving block contacts and presses the inclined surface I of the inclined plane fixed block, and the main hydraulic cylinder of the filter press stops working; When sludge is injected into the sludge cavity of the filter plate or when sludge is squeezed, the filter plate is subjected to the pressure of the injection or squeezing water, which causes the filter plate group to push the movable end plate outward. The inclined fixed block blocks the movable end plate from moving outward, so that the movable end plate always presses the filter plate during the injection and sludge squeezing processes, and the sludge cavity is always in a sealed state; Step 4, preparation for loosening: After the mud pressing is completed, the main hydraulic cylinder of the filter press is started, and the main hydraulic cylinder pushes the movable end plate so that the movable end plate presses the filter plate and a gap is generated between the inclined surface of the inclined surface moving block and the inclined surface I of the inclined surface fixed block; Step 5, the inclined surface moving block moves downward: the telescopic rod II of the pressing push rod device is retracted, and drives the inclined surface moving block to move downward; Step 6: Reset the inclined movable block: The telescopic rod I of the translation push rod device is retracted, and the main hydraulic cylinder of the filter press pulls the inclined movable block to the specified position, so that the filter plate group is loosened and the mud unloading space is met.

[0011] The beneficial effect of the present invention is that the main hydraulic cylinder only needs to push the movable end plate to the specified position. At this position, the hydraulic cylinder presses the filter plate group, and the extrusion pressure on the filter plate meets the sealing cavity pressure. The sealing cavity pressure is much smaller than the pressure greater than the sum of the sealing cavity force and the pressure of the filter plate squeezed by the main hydraulic cylinder when squeezing water. The output pressure of the main hydraulic is greatly reduced, which greatly reduces the investment cost and maintenance cost of the hydraulic system.

[0012] The hydraulic cylinder is only responsible for pushing the movable end plate to the locking position that meets the mechanical lock, and pulling the filter plate to the designated position for sludge unloading after the filtration is completed. The working time is about ten minutes. The main hydraulic cylinder is used to squeeze the movable end plate to ensure the sealing of the sludge chamber during pressing. The working time is generally 1 to 4 hours. The working time of the main hydraulic cylinder is greatly shortened, and the hydraulic output pressure is also greatly reduced, which effectively reduces the energy consumption of the hydraulic system and reduces the cost of sludge filtration.

[0013] Since the mechanical locking device of the present invention is installed on the outside of the movable end plate, the structure is compact, and the mechanical action in the implementation method only needs to increase the action space of several millimeters in the length direction of the filter press, and occupies little space. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a top view of the partial section of the filter press structure when the mechanical locking device is ready to be locked; Figure 2 for Figure 1 A partial enlarged view of the middle C part; Figure 3 for Figure 1 Sectional view in the middle AA direction; Figure 4 for Figure 1 Cross-section in the middle BB direction; Figure 5 It is a top view of the partial section of the filter press structure when the mechanical locking device is locked; Figure 6 for Figure 5 A partial enlarged view of the middle C' section; Figure 7 for Figure 5 A'-A' direction cross section; Figure 8 for Figure 5 Middle B'-B' direction cross section; Fig. 9 This is the main view of the pressure plate II structure; Fig.10 It is the side view of the pressure plate II structure; Fig.11 This is the front view of the mobile support structure; Fig.12 It is a top view of the mobile support structure; Fig.13 This is the main view of the pad structure; Fig.14 It is a top view of the pad structure; Fig.15 This is the main view of the structure of the pressure plate I; Fig.16 It is the top view of the structure of the pressure plate I; Fig.17 It is the front view of the inclined plane moving stopper structure; Fig.18 It is a top view of the inclined plane moving block structure; Fig.19 for Fig.17 Section view in the middle DD direction; Fig. 20 This is the front view of the inclined fixed stop block structure.

[0015] In the figure: 1. inclined plane fixed block; 1-1. inclined plane Ⅰ; 2. inclined plane movable block; 2-1. inclined plane; 2-2. groove Ⅰ; 2-3. mounting groove Ⅱ; 2-4. straight edge; 3. pressure plate Ⅰ; 3-1. mounting edge; 3-2. bending edge; 4. pad; 4-1. positioning hole Ⅰ; 4-2. positioning hole Ⅱ; 5. movable bracket 5; 5-1. boss; 5-2. mounting groove Ⅰ; 6. pressure plate Ⅱ; 6-1. vertical edge; 6-2. parallel edge; 7. translation push rod device; 7-1 telescopic rod Ⅰ; 8. tightening push rod device; 8-1. telescopic rod Ⅱ; 9. crossbeam; 10. movable end plate; 11. main hydraulic cylinder. DETAILED DESCRIPTION

[0016] like Figures 1 to 20 As shown, a mechanical locking device for sealing the chamber of a sludge filter press is provided. Taking the axis of the filter press as a reference, two sets of mechanical locking units are symmetrically arranged on the outer side of a movable end plate 10. The mechanical locking unit includes an inclined fixed block 1, an inclined movable block 2, a pressure plate I 3, a pad 4, a movable bracket 5, a pressure plate II 6, a translation push rod device 7 and a tightening push rod device 8.

[0017] A pair of L-shaped structure pressure plates Ⅱ6 are symmetrically fixed on one side of the outer side of the movable end plate 10, one side of the pressure plate Ⅱ6 is vertically fixed on the movable end plate 10, and the other side is parallel to the movable end plate 10. The side perpendicular to the movable end plate 10 is the vertical side 6-1, and the side parallel to the movable end plate 10 is the parallel side 6-2. Taking the axis of the filter press as a reference, another pair of pressure plates Ⅱ6 are symmetrically fixed on the other side of the outer side of the movable end plate 10.

[0018] A boss 5-1 is arranged on the outer sides of the two symmetrical sides of the U-shaped structured mobile bracket 5, and a mounting groove Ⅰ5-2 is arranged in the middle of the inner side of the horizontal side of the mobile bracket 5; the mobile bracket 5 is installed in a space formed by a pair of symmetrically placed pressure plates Ⅱ6, and the two bosses 5-1 are respectively in sliding contact with the inner sides of the vertical sides 6-1 of the two pressure plates Ⅱ6, and the parallel sides 6-2 of the two pressure plates Ⅱ6 are respectively matched with the two bosses 5-1.

[0019] The groove Ⅰ2-2 of the inclined plane moving block 2 is arranged on both sides of the straight edge 2-4 of the inclined plane moving block 2, and the installation groove Ⅱ2-3 of the inclined plane moving block 2 is arranged at the bottom end of the straight edge 2-4 of the inclined plane moving block 2; the fixed pad 4 is fixed to the outer side of the horizontal edge of the movable bracket 5 through four positioning holes Ⅰ4-1, and two rows of L-shaped pressure plates Ⅰ3 are respectively installed on both sides of the pad 4, and the installation edges 3-1 of the pressure plates Ⅰ3 are respectively fixed on the pad 4, and the pressure plates Ⅰ3 on both sides are arranged oppositely, and the space formed by the bent edges 3-2 of the four oppositely arranged pressure plates Ⅰ3 forms a slideway for the inclined plane moving block 2; the bent edges 3-2 of the pressure plate Ⅰ3 cooperate with the grooves 2-2 on both sides of the inclined plane moving block 2.

[0020] The main hydraulic cylinder 11 pushes the mobile end plate to squeeze the filter plate. When the squeezing filter plate pressure of the main hydraulic cylinder 11 meets the sealing pressure, the position of the mobile end plate is determined. The position of the inclined fixed block 1 is determined according to the position of the mobile end plate, and the inclined fixed block 1 is fixed on the beam 9.

[0021] The cylinder body of the translation push rod device 7 is fixed on the outer end surface of the movable end plate 10, and the telescopic rod Ⅰ7-1 of the translation push rod device 7 is installed in the installation groove Ⅰ5-2 in the middle of the bottom edge of the movable bracket 5; the cylinder body of the tightening push rod device 8 is installed on the pad 4, at a position below the inclined moving block 2, through four positioning holes Ⅱ4-2, and the telescopic rod Ⅱ8-1 of the tightening push rod device 8 is installed in the installation groove Ⅱ2-3 of the inclined moving block 2.

[0022] A method for realizing a mechanical locking device for sealing a sludge filter press chamber, working in accordance with the following steps, wherein two sets of mechanical locking units work synchronously, including two stages of locking and loosening, wherein steps one to three are the locking stage, and steps four to six are the loosening stage: Step 1, locking preparation: the main hydraulic cylinder 11 of the filter press pushes the mobile end plate 10 to the position to be locked, at which time the sludge chamber of the diaphragm plate frame filter plate group is in a sealed state.

[0023] Step 2, translation: the telescopic rod Ⅰ7-1 of the translation push rod device 7 is extended to push the mobile bracket 5 outward to the specified position, and the pad 4, pressure plate Ⅰ3, inclined surface moving block 2, and tightening push rod device 8 installed on the inclined surface of the mobile bracket 5 in sequence move together with the movement of the mobile bracket 5; the moving position of the mobile bracket 5 is controlled by the proximity switch signal.

[0024] Step three, the inclined surface movable block is pushed up: when the movable bracket 5 reaches the specified position, the telescopic rod II8-1 of the pushing rod device 8 pushes the inclined surface movable block 2 to move upward, the inclined surface 2-1 of the inclined surface movable block 2 contacts and presses the inclined surface I1-1 of the inclined surface fixed block 1, and the main hydraulic cylinder 11 of the filter press stops working.

[0025] When sludge is injected into the sludge cavity of the filter plate or sludge is squeezed, the filter plate is subjected to the pressure of the mud injection or the pressure of the squeezing water, which causes the filter plate group to have a tendency to push the movable end plate 10 to move outward, and the inclined fixed stopper 1 blocks the movable end plate 10 from moving outward, so that the movable end plate always presses the filter plate during the mud injection process and the sludge squeezing process, and the sludge cavity is always in a sealed state.

[0026] Step 4, preparation for loosening: After the mud pressing is completed, the hydraulic system of the filter press is started, and the main hydraulic cylinder pushes the movable end plate so that the movable end plate presses the filter plate and creates a gap between the inclined surface 2-1 of the inclined movable stopper 2 and the inclined surface Ⅰ1-1 of the inclined fixed stopper 1.

[0027] Step 5, the inclined surface moving block moves downward: the telescopic rod II8-1 of the pressing push rod device 8 is retracted, and drives the inclined surface moving block 2 to move downward.

[0028] Step six, the inclined surface moving block is reset: the telescopic rod Ⅰ7-1 of the translation push rod device 7 is retracted, and the main hydraulic cylinder 11 of the filter press pulls the moving end plate to the specified position, so that the filter plate group is loosened and the mud unloading space is met.

Claims

1. A mechanical locking device for sealing a sludge filter press, characterized in that: Taking the axis of the filter press as a reference, two sets of mechanical locking units are symmetrically arranged on the outer side of the movable end plate (10), wherein the mechanical locking units include an inclined fixed block (1), an inclined movable block (2), a pressing plate I (3), a pad (4), a movable bracket (5), a pressing plate II (6), a translation push rod device (7), and a tightening push rod device (8); Two pairs of the pressing plates II (6) are symmetrically arranged on both sides of the outer side surface of the movable end plate (10), and the pressing plates II (6) are of L-shaped structure, and each pair of pressing plates II (6) is symmetrical up and down; the movable bracket (5) is of U-shaped structure, and is slidably arranged in the space formed by the two pairs of the pressing plates II (6); the pad (4) is fixed on the horizontal side of the movable bracket (5); the pressing plate I (3) is of L-shaped structure, and several pressing plates I (3) are respectively arranged on both sides of the pad (4) relative to each other, and the bent edges (3-2) of the two rows of pressing plates I (3) are slidably arranged in the grooves I (2-2) of the inclined movable block (2); the inclined fixed The fixed stopper (1) is arranged on the crossbeam (9), and the position of the inclined fixed stopper (1) is determined according to the sealing pressure required during mud injection. The cylinder body of the translation push rod device (7) is arranged on the outer end surface of the movable end plate (10), and the telescopic rod I (7-1) of the translation push rod device (7) is arranged in the installation groove I (5-2) in the middle of the bottom edge of the movable bracket (5); the cylinder body of the tightening push rod device (8) is arranged on the pad (4) and is located below the inclined movable stopper (2), and the telescopic rod II (8-2) of the tightening push rod device (8) is arranged in the installation groove II (2-3) of the inclined movable stopper (2).

2. A mechanical locking device for sealing chamber of a sludge filter press according to claim 1, characterized in that: Bosses (5-1) are respectively arranged on the outer sides of two symmetrical sides of the movable bracket (5), and a mounting groove I (5-2) is arranged in the middle of the inner side of the horizontal side of the movable bracket (5); the inner side surfaces of the vertical sides (6-1) of the two pressing plates II (6) are respectively in sliding contact with the outer sides of the two bosses (5-1) of the movable bracket (5).

3. The mechanical locking device for sealing chamber of a sludge filter press according to claim 1, characterized in that: Grooves I (2-2) are respectively arranged on both sides of the straight edge (2-4) of the inclined movable stopper (2), and a mounting groove II (2-3) is arranged on the outer side of the middle of the bottom end of the straight edge (2-4).

4. A method for realizing a mechanical locking device for sealing a sludge filter press chamber, characterized in that: Mechanical locking devices are symmetrically arranged on both sides of the movable end plate (10), and the two sets of mechanical locking devices work synchronously, including two stages of locking and loosening. Steps one to three are the locking stage, and steps four to six are the loosening stage: Step 1, locking preparation: the main hydraulic cylinder (11) of the filter press pushes the movable end plate (10) to the position to be locked, at which time the sludge chamber of the diaphragm plate frame filter plate group is in a sealed state; Step 2: Translation: the telescopic rod I (7-1) of the translation push rod device (7) is extended to push the mobile bracket (5) outward to a specified position, and the pad (4), the pressure plate I (3), the inclined moving block (2), and the tightening push rod device (8) installed on the mobile bracket (5) move together with the movement of the mobile bracket (5); Step 3, the inclined surface movable block is pushed up: when the movable bracket (5) reaches the specified position, the telescopic rod II (8-1) of the pressing push rod device (8) pushes the inclined surface movable block (2) to move upward, the inclined surface (2-1) of the inclined surface movable block (2) contacts and presses the inclined surface I (1-1) of the inclined surface fixed block (1), and the main hydraulic cylinder (11) of the filter press stops working; When sludge is injected into the filter plate sludge cavity or when sludge is squeezed, the filter plate is subjected to the pressure of the sludge injection or the pressure of the squeezing water, causing the filter plate group to have a tendency to push the movable end plate (10) to move outward, and the inclined fixed stopper (1) blocks the movable end plate (10) from moving outward, so that the movable end plate always presses the filter plate during the sludge injection process and the sludge squeezing process, and the sludge cavity is always in a sealed state; Step 4, preparation for loosening: After the mud pressing is completed, the main hydraulic cylinder (11) of the filter press is started, and the main hydraulic cylinder (11) pushes the movable end plate so that the movable end plate presses the filter plate and a gap is generated between the inclined surface (2-1) of the inclined surface movable stopper (2) and the inclined surface I (1-1) of the inclined surface fixed stopper (1); Step 5: the inclined surface moving block moves downward: the telescopic rod II (8-1) of the push rod device (8) is retracted, and drives the inclined surface moving block (2) to move downward; Step 6, the inclined movable block is reset: the telescopic rod I (7-1) of the translation push rod device (7) is retracted, and the main hydraulic cylinder (11) of the filter press pulls the movable end plate to the specified position, so that the filter plate group is loosened and the mud unloading space is met.

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