An ultra-rigid, ultra-high pressure elastic press filter frame with oil recovery function

Abstract

The present invention is applicable to the technical field of deep dehydration of sludge, and provides an ultra-rigid ultra-high pressure elastic press filter frame with oil recovery function, the ultra-rigid ultra-high pressure elastic press filter frame with oil recovery function comprises: a filter plate, ears and shoulders are installed on both sides of the filter plate, a single-acting small hydraulic cylinder is installed between the filter plates, and a push plate and a pressure plate are installed on the filter plates at both ends of the single-acting small hydraulic cylinder respectively; a cloth hanging pin is installed on the push plate and the pressure plate, an exhaust valve is provided on the side of the push plate, a hollow bolt is installed on the pressure plate, a recovery oil pipe is connected to the hollow bolt, and an oil inlet pipe joint is provided on the hollow bolt; a connecting plate is installed on the push plate; a T-shaped sealing strip is arranged on the pressure plate. Reduce the equipment maintenance cost; improve the stability of the entire equipment, and improve the durability of use; improve the equipment use efficiency; and improve the life of the hydraulic sealing ring of the small hydraulic cylinder.

Description

Technical Field

[0001] The invention belongs to the technical field of sludge deep dehydration, and in particular relates to an ultra-rigid ultra-high pressure elastic press filter frame with an oil recovery function. Background Art

[0002] Ultra-high pressure elastic press is a high-efficiency plate and frame filter press equipment, which consists of several groups of filter plates and frames arranged in sequence. Through the squeezing of the filter plates and frames, the water in the sludge is discharged through the filter cloth to achieve the purpose of dehydration. Traditional ultra-high pressure elastic presses usually use a large oil cylinder (plunger cylinder) to provide squeezing force. The filter plate frame is surrounded by a number of springs and guide sleeves, shafts or small cylinders between the fixed plate frame (load-bearing plate frame) and the movable plate frame to provide sealing force. The volume of the filter chamber is reduced by compressing the spring or reducing the stroke of the cylinder to squeeze the material and achieve the purpose of dehydration.

[0003] Because the ultra-high pressure elastic press is in contact with the compression spring and the filtrate of the material during operation, it is always in a critical high stress, high humidity and high corrosion environment; due to the critical high stress, micro cracks will appear on the surface of the compression spring; the high humidity and high corrosion environment accelerates the aging of the spring. The spring with a normal service life of hundreds of thousands of times actually has a service life of only 1,000 to 2,000 times, resulting in excessively high equipment maintenance costs.

[0004] The filter plate frame with the sealing force of the adjacent filter plate frame provided by the small hydraulic cylinder: the small hydraulic cylinder is installed on the fixed plate frame (load-bearing plate frame) in structure, and the end of the piston rod is installed on the movable plate frame; because the main pressure when squeezing materials often exceeds hundreds of tons or thousands of tons, due to the long series length of multiple plates and frames of the equipment, processing errors, and material imbalance, the filter plate frame is subjected to tens of tons or hundreds of tons of lateral force, which is distributed to the piston rod of each small hydraulic cylinder, far exceeding the lateral force that the small hydraulic cylinder itself can bear, causing the piston rod to be strained or the seal to fail, and the hydraulic cylinder to leak; causing the entire equipment to produce a compression rod instability phenomenon, which increases the failure rate. The hydraulic cylinder is in a high-humidity and high-corrosion environment like the compression spring, and the surface of the piston rod is easily corroded, forming pitting, which makes the hydraulic cylinder seal fail.

[0005] After a certain period of use, the filter plate frame provided by the conventional small hydraulic cylinder for sealing the adjacent filter plate frame may fail to seal and leak oil due to aging of the small hydraulic cylinder seal ring, corrosion and strain of the piston rod, deformation of the cylinder sleeve, etc., and the oil will be lost along with the material filtrate, causing secondary pollution, which increases the water treatment burden for users. In addition, due to aging and oil leakage of the seal ring, when the whole machine can still be used, users have to frequently add supplementary cylinder oil or replace sealing components to maintain the normal operation of the equipment, which greatly increases the operating cost and reduces the utilization efficiency of the sealing components.

[0006] Conventional small hydraulic cylinder provides sealing force for adjacent filter plate frames: the oil pressure of the small hydraulic cylinder is often maintained at the rated value through the overflow valve, so that the sealing ring of the small hydraulic cylinder is always in a high-pressure state, and the service life of the hydraulic sealing ring is reduced. Summary of the invention

[0007] The purpose of the embodiment of the present invention is to provide an ultra-rigid, ultra-high-pressure elastic press filter frame with oil recovery function, aiming to solve the current problems of high equipment maintenance costs; the piston rod surface is extremely easy to corrode, forming pitting, causing the cylinder seal to fail; the operating cost is greatly increased and the utilization efficiency of the sealing components is low; and the life of the hydraulic sealing ring is short.

[0008] The embodiment of the present invention is implemented as follows: an ultra-rigid ultra-high pressure elastic press filter frame with oil recovery function, the ultra-rigid ultra-high pressure elastic press filter frame with oil recovery function comprises:

[0009] A filter plate, wherein ears and shoulders are installed on both sides of the filter plate, a single-acting small hydraulic cylinder is installed between the filter plates, and a push plate and a pressure plate are installed on the filter plates at both ends of the single-acting small hydraulic cylinder respectively;

[0010] A cloth hanging pin is installed on the pushing plate and the pressure plate, an exhaust valve is provided on the side of the pushing plate, a hollow bolt is installed on the pressure plate, an oil recovery pipe is connected to the hollow bolt, and an oil inlet pipe joint is provided on the hollow bolt;

[0011] A connecting plate, mounted on the pushing plate, used to connect the pushing plate and the pressure plate;

[0012] The T-shaped sealing strip is arranged on the pressure plate to prevent the filter cloth from being cut and to improve the sealing effect.

[0013] Preferably, a sliding groove is provided on the connecting plate, and connecting bolts are installed on the pressure plate, and the connecting bolts cooperate with the sliding groove.

[0014] Preferably, the single-acting small hydraulic cylinder comprises:

[0015] The cylinder seat is installed on the push plate, a cylinder body is installed inside the cylinder seat, and a piston rod is arranged inside the cylinder body.

[0016] Preferably, a dust ring for the shaft is provided between the cylinder body and the piston rod, and a sealing ring for the high-pressure liquid cylinder hole is provided on the inner wall of the cylinder body;

[0017] The cylinder seat O-type sealing ring is arranged between the cylinder seat and the push plate, and the cylinder body O-type sealing ring is arranged inside the cylinder seat.

[0018] Preferably, the single-acting small hydraulic cylinders are evenly distributed at equal distances on the push plate, and the push plate is provided with a push plate oil channel and a mounting blind hole.

[0019] Preferably, a cylinder oil passage is provided inside the cylinder seat, and the cylinder oil passage cooperates with the push plate oil passage.

[0020] Preferably, the cylinder body and the cylinder seat are connected via threads, and a waterproof ring is provided on the cylinder seat.

[0021] An ultra-rigid ultra-high pressure elastic press filter frame with oil recovery function provided by an embodiment of the present invention has the following beneficial effects:

[0022] 1. Solved the technical problem that the filter plate frame, in which the compression spring provides the sealing force for the adjacent filter plate frames, causes the equipment maintenance cost to be too high.

[0023] 2. It solves the problem that the small cylinder of the filter plate frame, which provides sealing force for the adjacent filter plate frame, can withstand the lateral force, which causes the piston rod to be pulled or the seal to fail, and the cylinder to leak; causing the entire equipment to have a pressure rod instability phenomenon. At the same time, it solves the technical problem that the piston rod surface is very easy to corrode, forming pitting, and causing the cylinder seal to fail.

[0024] 3. The technical problem of a substantial increase in operating costs and low utilization efficiency of sealing components caused by oil seepage in the filter plate frame where the small liquid cylinder provides sealing force for adjacent filter plate frames has been solved.

[0025] 4. The service life of the hydraulic seal ring of the small cylinder is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of an ultra-rigid ultra-high pressure elastic press filter frame with oil recovery function according to the present invention;

[0027] Figure 2 The invention is a super rigid ultra-high pressure elastic press filter frame with oil recovery function. Figure 1 A schematic diagram of the overall structure from top view;

[0028] Figure 3 The invention is a super rigid ultra-high pressure elastic press filter frame with oil recovery function. Figure 2 AA section view in;

[0029] Figure 4 The invention is a super rigid ultra-high pressure elastic press filter frame with oil recovery function. Figure 1 BB section diagram in;

[0030] Figure 5 The invention is a super rigid ultra-high pressure elastic press filter frame with oil recovery function. Figure 4 Partial view of I in;

[0031] Figure 6The invention is a super rigid ultra-high pressure elastic press filter frame with oil recovery function. Figure 2 CC section diagram in;

[0032] Figure 7 This is a schematic diagram of the connection structure of a pressure plate and a push plate of a filter frame of an ultra-rigid ultra-high pressure elastic press with oil recovery function according to the present invention;

[0033] Figure 8 It is a structural schematic diagram of a single-acting small hydraulic cylinder of an ultra-rigid ultra-high-pressure elastic press filter frame with oil recovery function according to the present invention;

[0034] Fig. 9 The present invention is a schematic diagram of the overall structure of an ultra-rigid ultra-high pressure elastic press filter frame with oil recovery function.

[0035] In the attached figure: 1-ear shoulder; 2-push plate; 3-cloth hanging pin; 4-oil recovery pipe; 5-hollow bolt; 6-filter plate; 7-exhaust valve; 8-connecting plate; 9-oil inlet pipe joint; 10-pressure plate; 11-single-acting small hydraulic cylinder; 12-large gap packing seal; 13-T-type sealing strip; 14-push plate oil channel; 15-cylinder oil channel; 16-mounting blind hole; 17-sliding groove; 18-connecting bolt; 111-piston rod; 112-dust ring for shaft; 113-seal ring for high-pressure hydraulic cylinder hole; 114-cylinder body; 115-waterproof ring; 116-cylinder seat; 117-cylinder seat O-type seal ring; 118-cylinder body O-type seal ring. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0037] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0038] like Figures 1 to 9 As shown, in an embodiment of the present invention, the ultra-rigid ultra-high pressure elastic press filter frame with oil recovery function includes:

[0039] A filter plate 6, wherein ears and shoulders 1 are installed on both sides of the filter plate 6, a single-acting small hydraulic cylinder 11 is installed between the filter plates 6, and a push plate 2 and a pressure plate 10 are installed on the filter plates at both ends of the single-acting small hydraulic cylinder 11 respectively;

[0040] The cloth hanging pin 3 is installed on the pushing plate 2 and the pressure plate 10. The side of the pushing plate 2 is provided with an exhaust valve. The pressure plate 10 is provided with a hollow bolt 5. The hollow bolt 5 is connected with an oil recovery pipe 4. The hollow bolt 5 is provided with an oil inlet pipe joint 9.

[0041] A connecting plate 8, mounted on the push plate 2, and used to connect the push plate 2 and the pressure plate 10;

[0042] The T-shaped sealing strip 13 is disposed on the pressure plate 10 to prevent the filter cloth from being cut and to improve the sealing effect.

[0043] like Figures 1 to 7 As shown, a single ultra-rigid ultra-high pressure elastic press filter frame with oil recovery function is composed of: two sets of ear shoulders 1, a push plate 2, a plurality of cloth hanging pins 3, a set of oil recovery pipes 4, a plurality of hollow bolts 5, two filter plates 6, an exhaust valve 7, four or more connecting plates 8, an oil inlet pipe joint 9, a pressure plate 10, twenty-eight single-acting small hydraulic cylinders 11, twenty-eight large gap packing seals 12, and two sets of T-shaped sealing strips 13.

[0044] like Figure 4 As shown, two filter plates 6 with the function of supporting filter cloth are fixedly installed on both sides of the pressure plate 10, and T-shaped sealing strips 13 in the form of embedded installation are arranged around the inner sealing surfaces of the push plate 2 and the pressure plate 10 to prevent the filter cloth from being cut, improve the sealing effect, and extend the service life of the filter cloth.

[0045] like Figures 1 to 7 As shown, in the embodiment of the present invention, a sliding groove 17 is provided on the connecting plate 8 , and a connecting bolt 18 is installed on the pressure plate 10 , and the connecting bolt 18 cooperates with the sliding groove 17 .

[0046] like Figure 7 As shown, the push plate 2 and the pressure plate 10 are connected by a connecting plate 8 fixed on the push plate 2. The connecting plate 8 is provided with a sliding groove. The bolts fixed on the pressure plate 10 pass through the sliding groove and can move freely along the sliding groove to prevent the push plate 2 and the pressure plate 10 from being disengaged and separated.

[0047] like Figure 8 As shown, in an embodiment of the present invention, the single-acting small hydraulic cylinder includes:

[0048] The cylinder seat 116 is installed on the push plate 2 , and a cylinder body 114 is installed inside the cylinder seat 116 , and a piston rod 111 is arranged inside the cylinder body 114 .

[0049] like Figure 3As shown, the positioning slides of the push plate 2 and the pressure plate 10 are positioned by the outer wall of the cylinder body 114. When the entire ultra-high pressure elastic press is working at high pressure, the lateral force generated by the stability of the pressure rod of the adjacent multiple filter frames no longer acts on the piston rod 111, but acts on the outer wall of the cylinder body 114. Since the outer diameter of the hydraulic cylinder body is much larger than the diameter of the piston rod 111, the bending strength is dozens of times that of the piston rod 111. The cylinder bodies 114 of twenty-four or more single-acting small hydraulic cylinders 11 act at the same time, and the lateral force resistance of the entire filter frame is increased by more than dozens of times, which solves the problem of pressure rod instability in the filter plate group of the ultra-high pressure elastic press; at the same time, the piston rod 111 is no longer affected by the lateral force, avoiding the problem of the piston rod 111 being strained by the lateral stress.

[0050] like Figure 8 As shown, in the embodiment of the present invention, a shaft dust ring 112 is provided between the cylinder body 114 and the piston rod 111, and a sealing ring 113 for a high-pressure liquid cylinder hole is provided on the inner wall of the cylinder body 114;

[0051] The cylinder seat O-type sealing ring 117 is arranged between the cylinder seat 116 and the push plate 2, and the cylinder body O-type sealing ring 118 is arranged inside the cylinder seat 116.

[0052] like Figure 8 As shown, the single-acting small hydraulic cylinder 11 is composed of a piston rod 111, a dust ring 112 for the shaft, a sealing ring 113 for the high-pressure hydraulic cylinder hole, a cylinder body 114, a waterproof ring 115, a hydraulic cylinder seat 116, an O-type sealing ring 117 for the hydraulic cylinder seat, and an O-type sealing ring 118 for the cylinder body.

[0053] like Figure 3 and Figure 6 As shown, twenty-eight or more single-acting small hydraulic cylinders 11 are evenly symmetrically and fixedly installed around the push plate 2; the push plate 2 is provided with an oil passage and a blind hole for installing the single-acting small hydraulic cylinder 11; an oil cylinder seat O-ring 117 is provided between the single-acting small hydraulic cylinder 11 and the blind hole for installing the push plate 2 to prevent leakage of hydraulic oil.

[0054] like Figure 3 and Figure 6 As shown, in the embodiment of the present invention, the single-acting small hydraulic cylinders 11 are evenly distributed at equal distances on the push plate 2, and the push plate 2 is provided with a push plate oil passage 14 and a mounting blind hole 16.

[0055] like Figure 3As shown, the pressure plate 10 is provided with a blind hole 16 for inserting the single-acting small hydraulic cylinder 11; it is convenient for the single-acting small hydraulic cylinder 11 to slide back and forth in the blind hole 16; the mouth of the blind hole 16 is provided with a large gap packing seal ring 12 to play a sealing role; when the single-acting small hydraulic cylinder 11 leaks hydraulic oil during reciprocating motion, the leaked hydraulic oil can be stored in the blind hole 16, and the oil flow out through the hollow bolt 5 and the oil recovery pipe 4 installed around the pressure plate 10 is collected in the hydraulic oil tank. The service life of the seal ring 113 for the high-pressure hydraulic cylinder hole of the hydraulic cylinder can be extended, and the loss of hydraulic oil can be reduced for customers. The corrosion of the piston rod 111 surface caused by water passing through can be solved.

[0056] As shown Figure 6 and 8 As shown, in the embodiment of the present invention, a cylinder oil passage 15 is provided inside the cylinder seat 116 , and the cylinder oil passage 15 cooperates with the push plate oil passage 14 .

[0057] like Figure 7 , Figure 8 As shown, the cylinder seat 116 of the single-acting small cylinder 11 is provided with a cylinder oil passage 15, which is mutually connected with the push plate oil passage 14 of the push plate 2 after installation. The cylinder body 114 and the cylinder seat 116 are fixed by threaded connection, and a waterproof ring 115 and a cylinder body O-ring 118 are provided therebetween to play the role of thread waterproofing and sealing hydraulic oil.

[0058] like Figure 7 , Figure 8 As shown, the working process of the filter frame is that the hydraulic oil enters the push plate oil passage 14 of the push plate 2 through an oil inlet pipe joint 9 and is distributed to the cylinder seat 116 provided with a cylinder oil passage, pushing the piston rod 111 out, and at the same time pushing the pressure plate 10 and the push plate 2 to open to provide a constant sealing pressure for the adjacent filter frames.

[0059] like Figure 8 As shown, in the embodiment of the present invention, the cylinder body 114 is connected to the cylinder seat 116 via threads, and a waterproof ring 115 is provided on the cylinder seat 116 .

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An ultra-rigid ultra-high pressure elastic press filter frame with oil recovery function, characterized in that: The ultra-rigid ultra-high pressure elastic press filter frame with oil recovery function includes: A filter plate, wherein ears and shoulders are installed on both sides of the filter plate, a single-acting small hydraulic cylinder is installed between the filter plates, and a push plate and a pressure plate are installed on the filter plates at both ends of the single-acting small hydraulic cylinder respectively; A cloth hanging pin is installed on the pushing plate and the pressure plate, an exhaust valve is provided on the side of the pushing plate, a hollow bolt is installed on the pressure plate, an oil recovery pipe is connected to the hollow bolt, and an oil inlet pipe joint is provided on the hollow bolt; A connecting plate, mounted on the pushing plate, used to connect the pushing plate and the pressure plate; A T-shaped sealing strip, provided on the pressure plate, for preventing the filter cloth from being cut and improving the sealing effect; Wherein, the single-acting small hydraulic cylinder comprises: A cylinder seat, mounted on the push plate, a cylinder body is installed inside the cylinder seat, and a piston rod is arranged inside the cylinder body; The pressure bearing plate is provided with a mounting blind hole corresponding to the insertion of the single-acting small hydraulic cylinder, and the single-acting small hydraulic cylinder reciprocates in the mounting blind hole; The blind installation hole stores leaked hydraulic oil.

2. The ultra-rigid ultra-high pressure elastic press filter frame with oil recovery function according to claim 1, characterized in that: The connecting plate is provided with a sliding groove, and the pressure-bearing plate is provided with a connecting bolt, and the connecting bolt cooperates with the sliding groove.

3. The ultra-rigid ultra-high pressure elastic press filter frame with oil recovery function according to claim 1, characterized in that: A dust ring for the shaft is provided between the cylinder body and the piston rod, and a sealing ring for the high-pressure liquid cylinder hole is provided on the inner wall of the cylinder body; The oil cylinder seat O-type sealing ring is arranged between the oil cylinder seat and the push plate, and the oil cylinder seat is provided with a cylinder body O-type sealing ring.

4. The ultra-rigid ultra-high pressure elastic press filter frame with oil recovery function according to claim 1, characterized in that: The single-acting small hydraulic cylinders are evenly distributed on the push plate at equal distances, and a push plate oil passage is provided on the push plate.

5. The ultra-rigid ultra-high pressure elastic press filter frame with oil recovery function according to claim 4, characterized in that: A cylinder oil passage is provided inside the cylinder seat, and the cylinder oil passage cooperates with the push plate oil passage.

6. The ultra-rigid ultra-high pressure elastic press filter frame with oil recovery function according to claim 1, characterized in that: The cylinder body and the cylinder seat are connected via threads, and a waterproof ring is provided on the cylinder seat.

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