CN108635921B - Ultra-high pressure elastic squeezer with balanced squeezing force and constant sealing force of filter plate frame - Google Patents
Ultra-high pressure elastic squeezer with balanced squeezing force and constant sealing force of filter plate frame Download PDFInfo
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- CN108635921B CN108635921B CN201810790181.0A CN201810790181A CN108635921B CN 108635921 B CN108635921 B CN 108635921B CN 201810790181 A CN201810790181 A CN 201810790181A CN 108635921 B CN108635921 B CN 108635921B
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- 238000007789 sealing Methods 0.000 title claims abstract description 35
- 238000003825 pressing Methods 0.000 claims abstract description 110
- 238000000034 method Methods 0.000 claims abstract description 33
- 230000008569 process Effects 0.000 claims abstract description 31
- 239000003921 oil Substances 0.000 claims description 149
- 239000010734 process oil Substances 0.000 claims description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 229920006324 polyoxymethylene Polymers 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- 239000000428 dust Substances 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 2
- 230000002265 prevention Effects 0.000 claims 1
- 239000010720 hydraulic oil Substances 0.000 description 16
- 230000001360 synchronised effect Effects 0.000 description 7
- 238000006073 displacement reaction Methods 0.000 description 6
- 238000003754 machining Methods 0.000 description 5
- 239000010802 sludge Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 229910000975 Carbon steel Inorganic materials 0.000 description 3
- 229910001208 Crucible steel Inorganic materials 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 239000010962 carbon steel Substances 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 239000000706 filtrate Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229930040373 Paraformaldehyde Natural products 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- -1 polyoxymethylene Polymers 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/12—Filter presses, i.e. of the plate or plate and frame type
- B01D25/21—Plate and frame presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/12—Filter presses, i.e. of the plate or plate and frame type
- B01D25/21—Plate and frame presses
- B01D25/215—Construction of the filter plates, frames
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Fluid-Pressure Circuits (AREA)
- Presses And Accessory Devices Thereof (AREA)
Abstract
The invention discloses an ultrahigh-pressure elastic squeezer with balanced squeezing force and constant sealing force of a filter plate frame. The filter plate comprises a plurality of groups of filter plate frames positioned between thrust plates; four squeezing cylinders with the same specification are uniformly distributed in the cylinder mounting seat, and piston rods of the four squeezing cylinders are perpendicular to the pressure surface of the thrust plate; the connection points of the four piston rods and the thrust plate are uniformly distributed on the pressure bearing surface of the thrust plate. Each group of filter plate frames comprises a bearing plate frame, a movable plate frame and a plurality of plunger cylinders with two-stage self-guiding sleeve shafts; each plunger cylinder comprises a cylinder body, a cylinder bottom and a plunger rod; the plunger rod is used as a primary guide shaft and a secondary guide sleeve seat; the convex rod at the bottom of the cylinder is used as a secondary guide shaft; the cylinder body also serves as a first-stage guide sleeve seat. The invention uses four pressing cylinders with the same specification to replace one large cylinder, so that the balance of the pressing force transmitted by the four pressing cylinders can be ensured; the filter plate frame adopts a constant force plunger cylinder with two-stage self-guiding sleeve shafts, and the parallelism of the bearing plate frame and the movable plate frame in the squeezing process can be ensured.
Description
Technical Field
The invention belongs to the technical field of deep dehydration of sludge, relates to deep dehydration equipment of sludge, and in particular relates to an ultrahigh-pressure elastic squeezer with balanced squeezing force and constant sealing force of a filter plate frame.
Background
The super-high pressure elastic squeezer is one kind of efficient plate and frame filter pressing equipment, and has several filter plate frames arranged successively to extrude the water inside sludge to reach dewatering aim. The traditional ultrahigh pressure elastic squeezer generally adopts a large oil cylinder (plunger cylinder) to provide squeezing force, and the filter plate frame is provided with a plurality of springs, a plurality of guide sleeves and shafts around between a fixed plate frame (bearing plate frame) and a movable plate frame, so that the volume of a filter chamber is reduced completely by compressing the springs, and the squeezing of the filter plate frame is realized, and the purpose of dehydration is achieved.
The existing ultra-high pressure elastic squeezer has the following defects:
(1) The thrust plates, filter plate frames and thrust plates of the presses are generally square. A large oil cylinder is adopted to provide squeezing force, and the connection between a piston of the large oil cylinder and a thrust plate can only be positioned in the middle of a square. The forces transferred by the large cylinders are extremely unbalanced in the middle of the square, the sides of the square and the diagonals of the square.
(2) The sealing force of the filter plate frame is the spring force generated after the spring is compressed by the pressing force, and the spring force is increased along with the increase of the compressed displacement of the spring. When the spring force exceeds the minimum sealing force required for the filter plate frame, the excess spring force is instead detrimental and will counteract a portion of the effective pressing force. Moreover, the spring is easy to break, so that production is stopped, and time and labor are wasted in replacing the spring.
(3) During pressing, the fixed (load-bearing) and movable frames of the filter plate frame must remain parallel. In order to ensure that the fixed plate frame (bearing plate frame) and the movable plate frame of the filter plate frame move in parallel, a plurality of guide sleeves and shafts are usually arranged between the fixed plate frame (bearing plate frame) and the movable plate frame of the filter plate frame. The guide sleeves and the shafts are easy to corrode and wear, when the guide sleeves and the shafts wear a certain amount, the guide fails, and a plurality of filter plate frames can be bent upwards or leftwards and rightwards to deform in the pressing process, so that mud spraying is caused.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an ultrahigh-pressure elastic squeezer which can slow down the abrasion of a guide sleeve shaft, avoid the bending deformation of a filter plate frame, has balanced squeezing force and has constant sealing force of the filter plate frame.
The technical scheme of the invention is as follows:
the invention relates to an ultrahigh pressure elastic squeezer with balanced squeezing force and constant sealing force of filter plate frames, which comprises a frame, wherein a plurality of groups of filter plate frames are sequentially arranged on the frame; the front part of the frame is provided with a thrust plate, and the rear part of the frame is provided with a thrust plate; the thrust plate and the filter plate frames are arranged and fixed on two girders of the frame; two girders of the frame are arranged and fixed on the base; a plurality of groups of filter plate frames are positioned between the thrust plates; water receiving plates are arranged on two sides of the lower parts of the filter plate frames in the groups; the front end of the frame is provided with an oil cylinder mounting seat; four squeezing cylinders with the same specification are uniformly distributed in the cylinder mounting seat, and piston rods of the four squeezing cylinders (namely, four piston rods) are perpendicular to the pressed surface of the thrust plate; the heads of the four piston rods are fixedly connected with the thrust plate (can be fixedly connected with the thrust plate through a flange and a bolt); the four piston rods are uniformly distributed on the pressure surface of the thrust plate at the connection points with the thrust plate, so that the squeezing force transmitted to the thrust plate by four squeezing cylinders with the same specification can be ensured to be balanced.
Further, the pressure surface of the thrust plate is square or rectangular; the connection points of the four piston rods and the thrust plate are positioned on the corresponding points of the square or rectangular diagonal line quartering of the pressure surface of the thrust plate, so that the squeezing force transmitted to the thrust plate by four squeezing cylinders with the same specification can be ensured to be balanced.
Further, the filter plate frames of the squeezer, each group of filter plate frames comprises: a bearing plate frame, a plurality of (twenty) plunger cylinders with self-guiding sleeve shafts, a movable plate frame, a plurality of connecting pieces and filtering accessories; (the sealing force provided by the ram cylinder remains constant during pressing, and is therefore also called a constant force ram cylinder); each plunger cylinder is provided with a two-stage guide sleeve shaft, namely: each plunger cylinder is provided with a two-stage guide mechanism (comprising a two-stage guide sleeve shaft): the plunger rod is used as a primary guide shaft and a secondary guide sleeve seat; the cylinder body also serves as a first-stage guide sleeve seat; the convex rod at the bottom of the cylinder is also used as a secondary guide shaft. Each plunger cylinder comprises a cylinder body, a cylinder bottom and a plunger rod; the plunger rod is used as a primary guide shaft and a secondary guide sleeve seat; the cylinder bottom comprises a bottom round block and a convex rod which protrudes from the middle part of the bottom round block and is perpendicular to the bottom round block, and the convex rod of the cylinder bottom is used as a secondary guide shaft; the inside of the rear section of the plunger rod is provided with a cavity, the rear section of the plunger rod is sleeved outside the convex rod at the bottom of the cylinder (namely, the inside of the rear section of the plunger rod is hollowed to form a cavity which corresponds to the convex rod and can accommodate the convex rod), and the plunger rod also serves as a secondary guide sleeve seat, namely, a secondary guide shaft is a guide sleeve seat of the convex rod at the bottom of the cylinder; the head of the plunger rod is solid, and the head of the plunger rod is inserted into the mounting hole of the movable plate frame; the cylinder body is cylindrical and is arranged in a concave hole (namely a mounting hole) of the bearing plate frame; the head of the cylinder body is provided with a flange, and the cylinder body is fixedly connected with the bearing plate frame through fixing screws around the flange; the bottom of the cylinder body is sleeved outside the bottom round block of the cylinder bottom; the front part of the cylinder body is sleeved outside the plunger rod, and the cylinder body also serves as a first-stage guide sleeve seat, namely a first-stage guide shaft, namely the guide sleeve seat of the plunger rod.
Further, the plunger rod is made of stainless steel, the cylinder body is made of cast steel, and the cylinder bottom is made of carbon steel.
Further, the inside of the peripheral frame of the bearing plate frame is provided with a process oil duct which is communicated with the inside of the peripheral frame; a main inlet and a main outlet (with an oil inlet and return pipe joint) of the process oil duct are arranged at the bottom of one side of the bearing plate frame; one or more groups of process oil inlets and outlets (each group comprises one process oil inlet on one side and one process oil outlet on the other side) are formed in the cylinder body cylinder of each plunger cylinder, and the process oil inlets and outlets are communicated with a gap (larger space) between the cylinder body and the plunger rod; the process oil outlet which is arranged at the four corners of the bearing plate frame and is not required to be communicated is provided with a process oil duct plug; the gap (larger space) between the cylinder body and the plunger rod is a common oil inlet and return channel for each plunger cylinder; the cylinder bottom is internally provided with a cavity; a certain gap (smaller space) is reserved between the outer wall of the cylinder body and the bearing plate frame, and a certain gap (smaller space) is reserved between the bottom of the cylinder body and the cylinder bottom and the bearing plate frame, and the gaps are communicated and communicated with the cavity in the cylinder bottom; these gaps (smaller spaces) and the cavity inside the cylinder bottom are the oil intake and return channels (also called local oil intake and return channels) of each plunger cylinder.
Further, a first wear-resistant ring (serving as a first-stage guide sleeve) is arranged at the joint of the outer wall of the plunger rod and the inner wall of the cylinder body; a second wear-resistant ring (serving as a secondary guide sleeve) is arranged at the joint of the inner wall of the cavity at the rear section of the plunger rod and the convex rod at the bottom of the cylinder; the two-stage guide sleeve (the first-stage guide sleeve and the second-stage guide sleeve) adopts a wear-resistant ring which has wear resistance, low friction coefficient, high strength and polyformaldehyde material.
Further, the first-stage guide sleeve seat, namely the inner wall of the cylinder body cylinder, is composed of two circles of deep grooves and a circle of shallow inner protruding blocks in the middle, namely the first-stage guide sleeve seat is: a concave-convex structure formed by a circle of shallow inner convex blocks is arranged between the two circles of deep grooves. The concave-convex structure formed by arranging a circle of shallow inner convex blocks between the two circles of deep grooves can play a better role in fixing the primary guide sleeve.
Further, the inner wall of the cavity of the rear section of the plunger rod, which is the secondary guide sleeve seat, is composed of two circles of deep grooves and a circle of shallow inner protruding blocks in the middle, namely the secondary guide sleeve seat is: a concave-convex structure formed by a circle of shallow inner convex blocks is arranged between the two circles of deep grooves. The concave-convex structure formed by arranging a circle of shallow inner convex blocks between the two circles of deep grooves can play a better role in fixing the secondary guide sleeve.
Further, an eccentric compensation adjusting ring (made of polyoxymethylene) is arranged at the joint of the piston rod and the movable plate frame and is used for compensating and adjusting the position errors of the processing holes of the bearing plate frame and the movable plate frame, namely: the head part of the piston rod is inserted into the mounting hole of the movable plate frame, and an eccentric compensation adjusting ring is arranged at the joint of the mounting hole of the movable plate frame and the head part of the piston rod; the inner ring of the eccentric compensation adjusting ring is elliptical, the outer ring is circular, the inner ring of the mounting hole of the movable plate frame is circular, and the outer ring of the head part of the piston rod is circular; the outer ring of the eccentric compensation adjusting ring is attached to the mounting Kong Najuan of the movable plate frame, a gap is reserved between the inner ring of the eccentric compensation adjusting ring and the outer ring of the head part of the piston rod, and the head part of the piston rod can slightly deviate in the gap, so that the machining position errors of the mounting holes of the bearing plate frame and the movable plate frame can be automatically compensated and adjusted.
Further, the head of the piston rod is provided with a screw hole, the movable plate frame is also provided with a corresponding screw hole, the two screw holes (the screw hole of the piston rod and the screw hole of the movable plate frame) are provided with connecting screws, and a looseness-preventing spring washer is arranged between the connecting screws and the screw hole of the movable plate frame.
Further, a dustproof sealing ring (as a plunger cylinder for preventing dust and blocking filtrate) is arranged at the joint of the cylinder body of the plunger cylinder and the bearing plate frame and the piston rod.
Further, an O-shaped sealing ring (used as a static seal of the plunger cylinder) is arranged at the joint of the cylinder body of the plunger cylinder and the bearing plate frame.
The invention has the beneficial effects that:
the ultrahigh-pressure elastic squeezer with balanced squeezing force and constant sealing force of the filter plate frame has the following characteristics:
(1) Four pressing cylinders with the same specification replace one large cylinder and are applied to a thrust plate of a presser for pressing. The connection points of the four pressing cylinders with the same specification and the thrust plate are positioned on the middle point of the diagonal line of the square (or rectangle) of the pressed surface of the thrust plate, namely the quarter corresponding point. In this way, the forces transmitted by four pressing cylinders with the same specification are equal, and the distances between the cylinder transmission force point and the middle point of the square, the square diagonal point and the middle point of the square side line are equal. Therefore, the squeezing force transmitted to the thrust plate by the four squeezing cylinders with the same specification can be ensured to be balanced.
(2) When the back pressure return pressure of the single-acting plunger cylinder is properly controlled to be constant and the pressing force acts on the plunger rod of the plunger cylinder, the plunger cylinder is equivalent to a constant force spring, and the constant force is kept constant in the pressing process. The invention applies the function of the constant force spring to the filter plate frames of the ultra-high pressure elastic squeezer for the first time, so that the sealing force between the filter plate frames is enough and kept constant in the squeezing process of the filter plate frames.
(3) The invention develops and designs the guiding between the bearing plate frame and the movable plate frame into the inner guiding of the two-stage guiding sleeve shaft working in oil. The stainless steel plunger is designed to be used as a primary guide shaft and a secondary guide sleeve seat; the cast steel cylinder body is designed to be used as a primary guide sleeve seat; the carbon steel cylinder bottom is designed to be used as a secondary guide shaft; the two-stage guide sleeve is made of wear-resistant ring products with wear resistance, low friction coefficient, high strength and polyformaldehyde. The two-stage guide sleeve shafts work in oil, and abrasion and friction resistance are very small, so that parallelism of the bearing plate frame and the movable plate frame of the filter plate frame in the squeezing process is guaranteed.
(4) The ultrahigh-pressure elastic squeezer with balanced squeezing force and constant sealing force of the filter plate frame is provided with an eccentric compensation adjusting ring with an elliptical inner ring and a circular outer ring at the joint of the head part of the piston rod and the movable plate frame, so that the position errors of processing holes of the bearing plate frame and the movable plate frame can be automatically compensated and adjusted, and the processing requirements of the mounting holes on the fixed plate frame and the movable plate frame are greatly reduced.
Drawings
FIG. 1 is a schematic view of the overall structure of an ultra-high pressure elastic squeezer with balanced squeezing force and constant sealing force of a filter plate frame;
FIG. 2 shows the connection between piston rods of four pressing cylinders with the same specification and a thrust plate of the ultra-high pressure elastic squeezer with balanced pressing force and constant sealing force of a filter plate frame;
FIG. 3 is an enlarged view of A-A in FIG. 2;
FIG. 4 is a hydraulic schematic diagram of an ultra-high pressure elastic squeezer with balanced squeezing force and constant sealing force of a filter plate frame according to the invention;
FIG. 5 is a schematic diagram of the front view of a filter plate frame with self-guiding sleeve constant force plunger cylinder of the present invention;
FIG. 6 is a sectional view B-B in FIG. 5 (extended state);
FIG. 7 is a schematic diagram of a left side view of a filter plate frame with self-guiding sleeve constant force plunger cylinder in accordance with the present invention;
FIG. 8 is a cut-away view of section A-A of FIG. 7;
FIG. 9 is a schematic top view of a filter plate frame with self-guiding sleeve constant force plunger cylinder of the present invention;
FIG. 10 is a C-C cut-away view (extended state) of FIG. 5;
FIG. 11 is a sectional view C-C in FIG. 5 (pressed state);
FIG. 12 is an enlarged I/part view of FIG. 10;
FIG. 13 is a cut-away/partial enlarged view of D-D of FIG. 12;
FIG. 14 is an enlarged view of part II/of FIG. 10;
FIG. 15 is an enlarged view of III/part of FIG. 11;
fig. 16 is a schematic structural view of a cylinder 61 in the present invention;
fig. 17 is a schematic view of the structure of the plunger rod 66 of the present invention;
fig. 18 is a schematic view of the structure of the cylinder bottom 62 in the present invention;
fig. 19 is a schematic perspective view of an eccentricity compensation adjustment ring 53 in the present invention;
fig. 20 is a schematic front view of an eccentricity compensation adjustment ring 53 in the present invention;
FIG. 21 is a schematic view of a plunger cylinder extended state in the present invention;
fig. 22 is a schematic view of a plunger cylinder retracted state in the present invention.
In fig. 1-3: 45-oil cylinder mounting seat 46-squeezing oil cylinder 47-piston rod 48-thrust plate 49-thrust plate 50-filter plate frame 71-girder 72-mounting base 73-water receiving plate
Fig. 5 to 20: 51. bearing plate frame 52, movable plate frame 53, eccentric compensation adjusting ring 531, eccentric compensation adjusting ring inner ring 532, eccentric compensation adjusting ring outer ring 54, dust-proof sealing ring 55, O-ring 56, mounting hole 57, spring washer 58, connecting screw 59, fixing screw 60, plunger cylinder 61, cylinder body 62, cylinder bottom 63, cavity 64, protruding rod 65, cavity 66, plunger rod 660, plunger rod outer ring 67, first wear-resistant ring 68, second wear-resistant ring 69, water dropping hole 70, concave-convex structure
80. Process oil duct 81, oil inlet and return pipe joint 82, process oil inlet 83, process oil outlet 84, and process oil duct plug
Detailed Description
The invention is further described below with reference to the drawings and examples.
Examples
As shown in fig. 1, 2 and 3, the ultra-high pressure elastic squeezer with balanced squeezing force and constant sealing force of filter plate frames comprises a frame, wherein a plurality of groups of filter plate frames 50 are sequentially arranged on the frame; the front part of the frame is provided with a thrust plate 48, and the rear part of the frame is provided with a thrust plate 49; the thrust plate 48 and the filter plate frames 50 are arranged and fixed on two girders 71 of the frame; two girders 71 of the frame are arranged and fixed on an installation base 72; a plurality of groups of filter plate frames 50 are positioned between the thrust plates 49, 48; water receiving plates 73 are arranged on two sides of the lower part of the filter plate frames 50 of the groups; the front end of the frame is provided with an oil cylinder mounting seat 45; four squeeze cylinders 46 with the same specification are uniformly distributed and arranged (mounted) in a cylinder mounting seat 45, piston rods 47 of the four squeeze cylinders 46 (namely, four piston rods 47) are perpendicular to a pressed surface of a thrust plate 48, and the four piston rods 47 are parallel and symmetrically arranged; the heads of the four piston rods 47 are fixedly connected with a thrust plate 48 (can be fixedly connected through a flange and a bolt); the connection points of the four piston rods 47 and the thrust plate 48 are uniformly distributed on the pressure bearing surface of the thrust plate 48.
As shown in fig. 1, the frame of the ultra-high pressure elastic squeezer of the present invention is mainly composed of a girder 71, an oil cylinder mount 45, a thrust plate 49 and a mount base 72; it carries the entire pressing force, as well as the weight of the components above it and the weight of the sludge. The thrust plates 48 and the sets of filter plate frames 50 are mounted (removable) on two girders 71 of the frame.
As shown in fig. 2, the pressure receiving surface of the thrust plate 48 is square; the connection points of the four piston rods 47 and the thrust plate 48 are positioned on the corresponding points of the four equal divisions of the diagonal lines of the square pressed surface of the thrust plate 48, so that the squeezing force transmitted to the thrust plate 48 by the four squeezing cylinders 46 with the same specification can be ensured to be balanced.
Fig. 4 is a hydraulic schematic diagram of an ultrahigh pressure elastic squeezer with balanced squeezing force and constant sealing force of a filter plate frame. The names and functions of the components in fig. 4 are as follows:
1-an oil tank; and storing hydraulic oil, and radiating the hydraulic oil.
2-a low-pressure ball valve; and discharging hydraulic oil during maintenance.
3- -a level gauge; and displaying the oil quantity in the oil tank.
4-an air cleaner; a fuel tank breathing port and a fuel filling port.
5-a liquid level relay; and alarming when the liquid level in the oil tank is low.
6-a magnetic filter; and filtering out magnetic impurities in the oil liquid.
7- -an electric motor; converting the electrical energy into mechanical energy.
8, bell jar coupling; and the motor and the grading variable plunger pump are connected.
9- -an oil absorption filter; filtering out impurities in the hydraulic oil.
10- -a stage variable displacement plunger pump; converting mechanical energy into hydraulic energy. The flow rate is large at low pressure and small at high pressure.
11—a pressure gauge buffer; the buffer pressure oil impacts the pressure gauge.
12- -a pressure gauge; the current oil pressure is displayed.
13- -an electromagnetic spill valve; and (5) obtaining electricity to build pressure, and performing power-off unloading.
14- -a one-way valve; preventing the hydraulic oil from flowing backwards.
15- -an electrohydraulic reversing valve; the flow direction of the pressure oil is changed electrically.
16- -a hydraulically controlled check valve; the oil pressure in the oil passage is maintained.
17-one-way throttle valve; stabilizing the oil flow in the oil passage.
18- -a pressure transducer; the current oil pressure is converted into an electrical signal.
19—a pressure gauge buffer; the buffer pressure oil impacts the pressure gauge.
20- -a pressure gauge; the current oil pressure is displayed.
21- -a pressure gauge; the current oil pressure is displayed.
22—a pressure gauge buffer; the buffer pressure oil impacts the pressure gauge.
23- -pressure relay; the current oil pressure is converted into a switching signal.
24- -an electromagnetic directional valve; the flow direction of the pressure oil is changed electrically.
25- -a hydraulically controlled check valve; the oil pressure in the oil passage is maintained.
26—an overflow valve; when the accumulator is unloaded, excess control pressure oil is released.
27- -an overflow valve; during pressing, the back pressure discharges the pressure oil in the plunger cylinder, keeping the force in the plunger cylinder constant.
28- -high pressure ball valve; the accumulator is closed when it is filled with nitrogen.
29—an accumulator; during the pressing, the oil pressure in the plunger cylinder is maintained.
30—a pressure gauge buffer; the buffer pressure oil impacts the pressure gauge.
31- -a pressure gauge; the current oil pressure is displayed.
32—a pressure transducer; the current oil pressure is converted into an electrical signal.
33—a limit switch; when the press is completed, a switch signal is sent out.
34—a limit switch; when the thrust plate reaches the locking position, a switch signal is sent out.
35- -limit switch; when the squeezing oil cylinder returns to the bottom, a switch signal is sent out.
36- -an overflow valve; in the pressing process, when the pressure of the pressing oil cylinder (4) is larger than that of the pressing oil cylinder (2), the oil is discharged from the pressing oil cylinder (4) to the pressing oil cylinder (2).
37- -overflow valve; in the pressing process, when the pressure of the pressing oil cylinder (2) is larger than that of the pressing oil cylinder (4), the oil is discharged from the pressing oil cylinder (2) to the pressing oil cylinder (4).
38- -a synchronous valve; in the pressing process, the pressing oil cylinder (2) and the pressing oil cylinder (4) are kept to move synchronously.
39—an overflow valve; in the pressing process, when the pressure of the pressing oil cylinders (2) and (4) is larger than that of the pressing oil cylinders (1) and (3), the oil is discharged from the pressing oil cylinders (2) and (4) to the pressing oil cylinders (1) and (3).
40- -an overflow valve; in the pressing process, when the pressure of the pressing oil cylinders (1) and (3) is larger than that of the pressing oil cylinders (2) and (4), the oil is discharged from the pressing oil cylinders (1) and (3) to the pressing oil cylinders (2) and (4).
41- -a synchronizing valve; in the pressing process, the pressing cylinders (1) and (3) and the pressing cylinders (2) and (4) are kept to move synchronously.
42—a synchronizing valve; in the pressing process, the pressing oil cylinder (1) and the pressing oil cylinder (3) are kept to synchronously move.
43—an overflow valve; in the pressing process, when the pressure of the pressing oil cylinder (1) is larger than that of the pressing oil cylinder (3), oil is discharged from the pressing oil cylinder (1) to the pressing oil cylinder (3).
44- -an overflow valve; in the pressing process, when the pressure of the pressing oil cylinder (3) is larger than that of the pressing oil cylinder (1), the oil is discharged from the pressing oil cylinder (3) to the pressing oil cylinder (1).
45-cylinder mounting seat 46-pressing cylinders (1) (2) (3) (4) 47-piston rods 48-thrust plates 49-thrust plates 50-filter plate frame
As shown in fig. 5 to 20, the filter plate frames 50 of the ultra-high pressure elastic squeezer of the present invention are filter plate frames with self-guiding sleeve constant force plunger cylinders, and each group of filter plate frames 50 is composed of: a bearing plate frame 51, twenty constant force plunger cylinders 60 with self-guiding sleeve shafts, a movable plate frame 52, a plurality of connecting pieces and filtering accessories; (the sealing force provided by the ram cylinder remains constant during pressing, and is therefore also called a constant force ram cylinder); each plunger cylinder 60 has a two-stage guide sleeve shaft, namely: each plunger cylinder is provided with a two-stage guide mechanism (comprising a two-stage guide sleeve shaft): the plunger rod 66 serves as a primary guide shaft and a secondary guide sleeve seat; the cylinder body 61 also serves as a primary guide sleeve seat; the boss 64 of the cylinder bottom 62 doubles as a secondary guide shaft. Plunger rod 66 is made of stainless steel, cylinder 61 is made of cast steel, and cylinder bottom 62 is made of carbon steel.
Each plunger cylinder 60 includes a cylinder body 61, a cylinder bottom 62, and a plunger rod 66; the plunger rod 66 serves as a primary guide shaft and a secondary guide sleeve seat; the cylinder bottom 62 comprises a bottom circular block and a convex rod 64 protruding from the middle part of the bottom circular block and perpendicular to the bottom circular block, and the convex rod 64 of the cylinder bottom is used as a secondary guide shaft; the inside of the rear section of the plunger rod 66 is provided with a cavity 65, the rear section of the plunger rod 66 is sleeved outside the convex rod 64 at the cylinder bottom (namely, the inside of the rear section of the plunger rod 66 is hollowed into a cavity 65 which corresponds to the convex rod 64 and can accommodate the convex rod 64), and the plunger rod 66 also serves as a secondary guide sleeve seat, namely, a guide sleeve seat of a secondary guide shaft (the convex rod 64 at the cylinder bottom); the head of the plunger rod 66 is solid and the head of the plunger rod 66 is inserted into the mounting hole 56 of the fly leaf frame 52; the cylinder 61 is cylindrical and is arranged in a concave hole (i.e. a mounting hole) of the bearing plate frame 51; the head of the cylinder body 61 is provided with a flange, and the cylinder body 61 is fixedly connected with the bearing plate frame 51 through fixing screws 59 around the flange; the bottom of the cylinder body 61 is sleeved outside the bottom round block of the cylinder bottom 62; the front part of the cylinder body 61 is sleeved outside the plunger rod 66, and the cylinder body 61 also serves as a first-stage guide sleeve seat, namely a guide sleeve seat of a first-stage guide shaft (the plunger rod 66).
The process oil ducts 80 which are communicated are arranged in the peripheral frames of the bearing plate frame 51; a main inlet and a main outlet of a process oil duct (namely an oil inlet and return pipe joint 81) are arranged at the bottom of one side of the bearing plate frame 51; four process oil inlets and outlets (two groups, each group comprising one process oil inlet 82 on one side, namely an oil inlet of the plunger cylinder, and one process oil outlet 83 on the other side, namely an oil outlet of the plunger cylinder) are formed in the cylinder body 61 cylinder of each plunger cylinder 60 and are communicated with a gap (larger space) between the cylinder body 61 and the plunger rod 66; the process oil outlet 83 which is arranged at the four corners of the bearing plate frame and is not required to be communicated is provided with a process oil duct plug 84 which is plugged by the plug (eight process oil outlets 83 are shared by four plunger cylinders 60 positioned at the four corners of the bearing plate frame 51, wherein seven process oil outlets 83 are plugged by the plug, and one process oil outlet 83 is communicated); the gap (larger space) between the cylinder body 61 and the plunger rod 66 is an oil intake and return passage shared by the plunger cylinders 60; the cylinder bottom 62 is internally provided with a cavity 63; a certain gap (smaller space) is reserved between the outer wall of the cylinder body 61 and the bearing plate frame 51, a certain gap (smaller space) is reserved between the bottoms of the cylinder body 61 and the cylinder bottom 62 and the bearing plate frame 51, and the gaps are communicated with each other and the cavity 63 in the cylinder bottom; these gaps (smaller spaces) and the cavity 63 inside the cylinder bottom 62 are oil intake and return passages (also referred to as local oil intake and return passages) of each plunger cylinder 60. A plurality of water dripping holes 69 are also arranged on the bottom frame of the bearing plate frame 51 for discharging filtrate.
A first wear-resistant ring 67 (serving as a primary guide sleeve) is arranged at the joint of the outer wall of the plunger rod 66 and the inner wall of the cylinder body 61; a second wear-resistant ring 68 (serving as a secondary guide sleeve) is arranged at the joint of the inner wall of the cavity 65 at the rear section of the plunger rod 66 and the convex rod 64 of the cylinder bottom 62; the two-stage guide sleeve adopts wear-resistant ring with low friction coefficient, high strength and polyformaldehyde as material.
The first-stage guide sleeve seat, namely the inner wall of the cylinder body 61 cylinder, is composed of two circles of deep grooves and a circle of shallow inner protruding blocks in the middle, namely the first-stage guide sleeve seat is: a concave-convex structure 70 formed by a circle of shallow inner convex blocks is arranged between the two circles of deep grooves. The concave-convex structure formed by arranging a circle of shallow inner convex blocks between the two circles of deep grooves can play a better role in fixing the primary guide sleeve.
The inner wall of the second-stage guide sleeve seat, namely the cavity 65 at the rear section of the plunger rod 66, is composed of two circles of deep grooves and a circle of shallow inner protruding blocks in the middle, namely the second-stage guide sleeve seat is: a concave-convex structure 70 formed by a circle of shallow inner convex blocks is arranged between the two circles of deep grooves. The concave-convex structure formed by arranging a circle of shallow inner convex blocks between the two circles of deep grooves can play a better role in fixing the secondary guide sleeve.
As shown in fig. 12 and 13, an eccentric compensation adjustment ring 53 (polyoxymethylene material for compensating and adjusting the position errors of the processing holes of the force-bearing plate frame 51 and the movable plate frame 52) is provided at the joint between the plunger rod 66 and the movable plate frame 52, that is: the head of the plunger rod 66 is inserted into the mounting hole 56 of the movable plate frame 52, and an eccentric compensation adjusting ring 53 is arranged at the joint between the mounting hole 56 of the movable plate frame 52 and the head of the plunger rod 66; the inner ring of the eccentricity compensation adjusting ring 53 (i.e., the inner ring 531 of the eccentricity compensation adjusting ring) is elliptical, the outer ring of the eccentricity compensation adjusting ring 53 (i.e., the outer ring 532 of the eccentricity compensation adjusting ring) is circular (as shown in fig. 19 and 20, the diameter of the outer ring circle of the eccentricity compensation adjusting ring is 63mm; the distance between the two opposite ends of the inner ring ellipse of the eccentricity compensation adjusting ring is 52mm at the maximum and 50mm at the minimum); the inner ring of the mounting hole 56 of the movable plate frame 52 is circular, and the outer ring of the head of the plunger rod 66 (namely the plunger rod outer ring 660) is circular; the outer ring of the eccentric compensation adjusting ring 53 is attached to the inner ring of the mounting hole 56 of the movable plate frame 52, a gap is left between the inner ring 531 of the eccentric compensation adjusting ring and the outer ring 660 of the plunger rod at the left and right parts (i.e., there is an eccentric compensation adjustment amount of + -1 mm in 360 ° direction between the inner ellipse of the eccentric compensation adjusting ring and the outer circle of the plunger rod), and the head of the plunger rod 66 can slightly deviate in the gap, thereby automatically compensating and adjusting the machining position errors of the mounting holes of the force-bearing plate frame 51 and the movable plate frame 52.
The head (front center) of the plunger rod 66 is provided with a screw hole, the movable plate frame 52 is also provided with a corresponding screw hole, the two screw holes (screw hole of the plunger rod and screw hole of the movable plate frame) are provided with a connecting screw 58, and a looseness-preventing spring washer 57 is arranged between the connecting screw 58 and the screw hole of the movable plate frame 52.
A dustproof seal ring 54 (as a plunger cylinder for preventing dust and blocking filtrate) is provided at a position where a cylinder port of the plunger cylinder 60 where the cylinder body 61 is connected to the carrier plate frame 51 is connected to the plunger rod 66.
An O-ring 55 (as a stationary seal for the ram) is provided at the junction of the cylinder body 61 of the ram 60 and the load-bearing plate frame 51.
The mounting and using method of the ultra-high pressure elastic squeezer with balanced squeezing force and constant sealing force of the filter plate frame comprises the following steps: when in use, the position where twenty guide sleeve shafts are originally arranged between the fixed plate frame and the movable plate frame of each group of filter plate frames of the squeezer is changed into twenty constant force plunger cylinders with the self-guide sleeve shafts. That is, the peripheral frame of the force-bearing plate frame 51 (fixed plate frame) is provided with a concave hole (mounting hole) at regular intervals, the movable plate frame 52 is provided with a corresponding concave hole (mounting hole) at regular intervals, and the mounting holes of the force-bearing plate frame 51 and the movable plate frame 52 are provided with constant force plunger cylinders with self-guiding sleeve shafts. The specific installation method of each constant force plunger cylinder with the self-guiding sleeve shaft comprises the following steps: firstly, a cylinder body 61 of a plunger cylinder 60 is placed in a mounting hole of a force-bearing plate frame 51, and a fixing screw 59 is inserted into a screw hole of an outer ring flange of the cylinder body 61 of the plunger cylinder 60 and a screw hole of the force-bearing plate frame 51 and screwed, so that the cylinder body 61 of the plunger cylinder 60 is mounted and fixed on the force-bearing plate frame 51; then, the bottom 62 of the plunger cylinder 60 is installed in the cylinder body 61; then, the rear section of the plunger rod 66 is arranged between the cylinder body 61 and the cylinder bottom 62, the front end of the plunger rod 66 is inserted into the mounting hole of the movable plate frame 52, and the position errors of the bearing plate frame and the movable plate frame processing hole are compensated and adjusted through the automatic compensation eccentric collar 53; finally, the connecting screw 58 is inserted into the screw hole of the movable plate frame 52 and the screw hole of the plunger rod 66 and screwed, so that the front end of the plunger rod 66 and the movable plate frame 52 are fixedly connected together.
The principle of action of the ultra-high pressure elastic squeezer with balanced squeezing force and constant sealing force of the filter plate frame is as follows:
as shown in fig. 8, 10, 14 and 21, the pressure oil from the hydraulic station oil tank enters the plunger cylinder 60 (oil inlet) through the process oil passage total inlet and total outlet (i.e. the oil inlet and return pipe joint 81), the oil inlet and return passage (i.e. the process oil passage 80), the process oil inlet 82, part of the pressure oil enters the gap between the cylinder body 61 and the plunger rod 66, and the pressure oil exits from the process oil outlet 83 (i.e. the oil inlet and return passages shared by the plunger cylinders) and enters the next plunger cylinder 60; the other part enters the gap between the outer wall of the cylinder body 61 and the bearing plate frame 51, then enters the gaps between the cylinder body 61, the bottom of the cylinder bottom 62 and the bearing plate frame 51, then enters the cavity 63 in the cylinder bottom, then enters the cavity 65 (namely a local oil inlet and return channel) in the rear section of the plunger rod 66, and the plunger rod 66 is pushed to extend by the oil pressure in the plunger cylinder, so that the force is transmitted to the movable plate frame 52.
As shown in fig. 8, 11, 15 and 22, external force acts on the plunger rod 66 through the movable plate frame 52, the plunger rod 66 is retracted, oil in the plunger cylinder is discharged out of the plunger cylinder 60 (oil return) through the local oil inlet and return channel, and then is returned to the next plunger cylinder 60 through the common oil inlet and return channel and the process oil channel 80 of each plunger cylinder, and finally is returned to the hydraulic station oil tank through the oil inlet and return pipe joint 81.
The pressing process of the ultrahigh-pressure elastic squeezer with balanced pressing force and constant sealing force of the filter plate frame is as follows:
extending the plunger cylinder
The motor 7 is started-the hydraulic oil of the level-variable plunger pump 10 flows back to the oil tank 1 through the electromagnetic overflow valve 13 in an unloading way-the electromagnet DT0 of the electromagnetic overflow valve 13 and the electromagnet DT3 of the electromagnetic reversing valve 24 are electrified-the hydraulic oil of the level-variable plunger pump 10 flows to the filter plate frame through the one-way valve 14, the P and B ports of the electromagnetic reversing valve 24, the hydraulic control one-way valve 25 and the plunger cylinder 60 in sequence-when the pressure of the pressure converter 32 reaches 16MPa, the plunger cylinder 60 is fully extended, DT0 and DT3 are disconnected, and the extension of the plunger cylinder 60 is ended. The motor 7 is still started, the hydraulic oil of the constant-stage variable plunger pump 10 flows back to the oil tank 1 after unloading through the electromagnetic relief valve 13, and waits for the next action.
Second, fast forward of the squeezing cylinder
The electromagnet DT0 of the electromagnetic overflow valve 13 and the electromagnet DT1 of the electro-hydraulic reversing valve 15 are electrified, hydraulic oil of the grading variable plunger pump 10 flows into the rodless cavity of the squeezing cylinder, flows out of the rod cavity of the squeezing cylinder, flows back to the oil tank 1 through the ports A and T of the electro-hydraulic reversing valve 15, and sequentially passes through the port P and port B of the one-way valve 14, the hydraulic control one-way valve 16, the one-way throttle valve 17, the synchronous valve 41, the synchronous valve 38 and the synchronous valve 42. At this time, the hydraulic oil pressure is low and the flow rate is high, and the constant-stage variable displacement plunger pump 10 is automatically switched into a low-pressure high-flow rate operation mode. The squeeze cylinder 46 moves rapidly-when the thrust plate presses against limit switch 34, DT0 and DT1 are disconnected and the squeeze cylinder 46 is fast-forwarding is completed ready for mud intake. At this time, the motor 7 is still started, and the hydraulic oil of the constant-stage variable displacement pump 10 flows back to the oil tank 1 via the electromagnetic spill valve 13 with unloading, waiting for the next action.
Thirdly, maintaining pressure and feeding mud by using a squeezing oil cylinder
When mud is fed, the plunger cylinder 60 is pressurized by the accumulator 29 and the hydraulic control one-way valve 25; the pressing cylinder 46 is pressurized by the hydraulic control check valve 16. If the pressure transducer 32 is below 16MPa, DT0 and DT3 are energized, and the plunger cylinder 60 is pressurized. In the mud feeding process, the limit switch 34 must be turned on, and if the limit switch 34 is turned off, the DT0 and DT3 are powered to supplement the pressure of the pressing cylinder 46. When the mud feeding pressure reaches 1.2MPa (the mud feeding pressure is measured by a pressure sensor on a mud feeding pipeline), mud feeding is finished.
Fourthly, intermittent squeezing of a squeezing cylinder
And (5) finishing mud feeding, and switching to an intermittent pressing process. The electromagnet DT0 of the electromagnetic overflow valve 13 and the electromagnet DT1 of the electrohydraulic reversing valve 15 are intermittently powered on and off to press. At this time, the squeezing pressure of the squeezing cylinder 46 intermittently rises, the hydraulic oil pressure is high, the flow rate is small, and the variable displacement pump 10 is automatically switched to the high-pressure low-flow rate operation mode. At the same time, the plunger cylinder 60 is compressed, and its back pressure oil return is achieved by forcibly opening the relief valve 27. The pressure of the relief valve 27 was adjusted to 20MPa and the pressure in the plunger cylinder was also 20MPa, so the force transmitted by the plunger cylinder was constant. That is, the plunger cylinder 60 here corresponds to a constant force spring. When the thrust plate is pressed to the limit switch 33, or when the pressure of the pressure transducer 18 reaches 24MPa, the pressing process is ended as a condition for ending the pressing process. DT0 and DT1 are disconnected and ready for the next action.
Fifth, pressing cylinder pressure maintaining and time delay
And (3) ending the intermittent pressing process, wherein the pressing cylinder needs to maintain pressure and delay for a period of time. The length of the delay time is mainly determined by the sludge characteristics, and is usually 60 seconds to 120 seconds. And (5) after the pressure maintaining and the time delay are finished, opening the water receiving plate.
Six, releasing pressure of plunger cylinder
The electromagnet DT0 of the electromagnetic overflow valve 13 and the electromagnet DT4 of the electromagnetic directional valve 24 are electrified, and hydraulic oil of the level-fixed variable plunger pump 10 flows back to the oil tank through the one-way valve 14, the P and A ports of the electromagnetic directional valve 24, the control oil port of the hydraulic control one-way valve 25 and the overflow valve 26 in sequence; meanwhile, the hydraulic oil in the plunger cylinder 60 flows reversely through the hydraulic control one-way valve 25 and flows back to the oil tank through the ports B and T of the electromagnetic directional valve 24. The plunger cylinder 60 is depressurized for 3 seconds.
Seventhly, the squeezing oil cylinder is quickly retracted
The electromagnet DT0 of the electromagnetic overflow valve 13 and the electromagnet DT2 of the electro-hydraulic reversing valve 15 are electrified, namely the hydraulic oil of the constant-level variable plunger pump 10 flows back to the oil tank through the one-way valve 14, the P and A ports of the electro-hydraulic reversing valve 15, the rod cavity of the squeezing oil cylinder, the rodless cavity of the squeezing oil cylinder, the synchronous valve 38 and the synchronous valve 42, the synchronous valve 41, the one-way throttle valve 17, the control one-way valve 16, the B and T ports of the electro-hydraulic reversing valve 15. At this time, the hydraulic oil pressure is low and the flow rate is high, and the constant-stage variable displacement plunger pump 10 is automatically switched into a low-pressure high-flow rate operation mode. The press cylinder is quickly retracted-when the thrust plate is pressed to the limit switch 35, DT0 and DT2 are disconnected and the press cylinder is quickly retracted to end. The motor 7 is turned off and ready for discharging.
The ultrahigh-pressure elastic squeezer with balanced squeezing force and constant sealing force of the filter plate frame has the following characteristics:
(1) The thrust plate, filter plate frame and thrust plate of the press remain square. Four pressing cylinders with the same specification are used for replacing one large cylinder. The connection of the four pressing cylinders with the same specification and the thrust plate is positioned at the midpoint of the diagonal line of the square, namely at the corresponding point of four equal divisions. In this way, the forces transmitted by four pressing cylinders with the same specification are equal, and the distances between the cylinder transmission force point and the middle point of the square, the square diagonal point and the middle point of the square side line are equal. Therefore, the squeezing force transmitted to the thrust plate by the four squeezing cylinders with the same specification can be ensured to be balanced.
(2) The filter plate frame adopts a constant force plunger cylinder with two-stage self-guiding sleeve shafts, so that the parallelism of the bearing plate frame and the movable plate frame of the filter plate frame in the squeezing process can be ensured; the sealing force between the filter plate frames is enough and is kept constant in the pressing process of the filter plate frames. The guiding between the bearing plate frame and the movable plate frame is developed and designed into the inner guiding of the two-stage guiding sleeve shaft working in oil liquid, so that the abrasion and the friction resistance are greatly reduced.
(3) The periphery frame of the bearing plate frame is made of steel castings, and the process oil duct is made during casting, so that the problem of difficulty in drilling deep holes is solved (the periphery frame of the existing bearing plate frame is made of square steel). After machining, the bearing plate frame steel casting has good rigidity in the pressing process and is not easy to deform, so that the problem of mud spraying caused by deformation of the plate frame in the pressing process is solved.
(4) The eccentric compensation adjusting ring with the elliptical inner ring and the circular outer ring is arranged at the joint of the head part of the piston rod and the movable plate frame, so that the machining position errors of the mounting holes of the bearing plate frame and the movable plate frame can be automatically compensated and adjusted, and the machining requirements of the mounting holes on the fixed plate frame and the movable plate frame are greatly reduced.
Claims (7)
1. The ultra-high pressure elastic squeezer is characterized by comprising a frame, wherein a plurality of groups of filter plate frames are sequentially arranged on the frame; the front part of the frame is provided with a thrust plate, and the rear part of the frame is provided with a thrust plate; the thrust plate and the filter plate frames are arranged and fixed on two girders of the frame; two girders of the frame are arranged and fixed on the base; a plurality of groups of filter plate frames are positioned between the thrust plates; water receiving plates are arranged on two sides of the lower parts of the filter plate frames in the groups; the front end of the frame is provided with an oil cylinder mounting seat; four squeezing cylinders with the same specification are uniformly distributed in the cylinder mounting seat, and piston rods of the four squeezing cylinders, namely, four piston rods are perpendicular to the pressed surface of the thrust plate; the heads of the four piston rods are fixedly connected with the thrust plate; the four connecting points of the piston rods and the thrust plate are uniformly distributed on the pressed surface of the thrust plate;
wherein the pressure surface of the thrust plate is square or rectangular; the connection points of the four piston rods and the thrust plate are positioned on the corresponding points of the square or rectangular diagonal quarters of the pressed surface of the thrust plate;
each group of filter plate frames consists of: the device comprises a bearing plate frame, a plurality of plunger cylinders with self-guiding sleeve shafts, a movable plate frame, a plurality of connecting pieces and filtering accessories;
the four pressing cylinders are used for intermittent pressing, and in the intermittent pressing process, the pressure oil in the plunger cylinder is discharged in a back pressure mode through forced opening of the overflow valve, and the force in the plunger cylinder is kept constant:
the four squeezing cylinders are respectively a squeezing cylinder (1), a squeezing cylinder (2), a squeezing cylinder (3) and a squeezing cylinder (4), and the overflow valve comprises an overflow valve 36, an overflow valve 37, an overflow valve 39, an overflow valve 40, an overflow valve 43 and an overflow valve 44;
in the pressing process, when the pressure of the pressing oil cylinder (4) is larger than that of the pressing oil cylinder (2), the overflow valve 37 is opened, so that the pressing oil cylinder (4) discharges oil to the pressing oil cylinder (2);
in the pressing process, when the pressure of the pressing oil cylinder (2) is larger than that of the pressing oil cylinder (4), the overflow valve 37 is opened, so that the pressing oil cylinder (2) discharges oil to the pressing oil cylinder (4);
in the pressing process, when the pressure of the pressing oil cylinders (2) and (4) is larger than that of the pressing oil cylinders (1) and (3), the overflow valve 39 is opened, so that the pressing oil cylinders (2) and (4) discharge oil to the pressing oil cylinders (1) and (3);
in the pressing process, when the pressure of the pressing oil cylinders (1) and (3) is larger than that of the pressing oil cylinders (2) and (4), the overflow valve 40 is opened to enable the pressing oil cylinders (1) and (3) to discharge oil to the pressing oil cylinders (2) and (4);
in the pressing process, when the pressure of the pressing oil cylinder (1) is larger than that of the pressing oil cylinder (3), the overflow valve 43 is opened, so that the pressing oil cylinder (1) discharges oil to the pressing oil cylinder (3);
in the pressing process, when the pressure of the pressing oil cylinder (3) is larger than that of the pressing oil cylinder (1), the overflow valve 44 is opened, so that the pressing oil cylinder (3) discharges oil to the pressing oil cylinder (1);
each plunger cylinder is provided with a two-stage guide mechanism, namely a two-stage guide sleeve shaft is included; each plunger cylinder comprises a cylinder body, a cylinder bottom and a plunger rod; the plunger rod is used as a primary guide shaft and a secondary guide sleeve seat; the cylinder bottom comprises a bottom round block and a convex rod which protrudes from the middle part of the bottom round block and is perpendicular to the bottom round block, and the convex rod of the cylinder bottom is used as a secondary guide shaft; the inside of the rear section of the plunger rod is provided with a cavity, the rear section of the plunger rod is sleeved outside the convex rod at the bottom of the cylinder, namely the inside of the rear section of the plunger rod is hollowed to form a cavity which corresponds to the convex rod and can accommodate the convex rod, and the plunger rod also serves as a secondary guide sleeve seat, namely a secondary guide shaft is a guide sleeve seat of the convex rod at the bottom of the cylinder; the head of the plunger rod is solid, and the head of the plunger rod is inserted into the mounting hole of the movable plate frame; the cylinder body is cylindrical and is arranged in a concave hole, namely a mounting hole, of the bearing plate frame; the head of the cylinder body is provided with a flange, and the cylinder body is fixedly connected with the bearing plate frame through fixing screws around the flange; the bottom of the cylinder body is sleeved outside the bottom round block of the cylinder bottom; the front part of the cylinder body is sleeved outside the plunger rod, and the cylinder body also serves as a first-stage guide sleeve seat, namely a first-stage guide shaft, namely a guide sleeve seat of the plunger rod;
an eccentric compensation adjusting ring is arranged at the joint of the mounting hole of the movable plate frame and the head part of the piston rod; the inner ring of the eccentric compensation adjusting ring is elliptical, the outer ring is circular, the inner ring of the mounting hole of the movable plate frame is circular, and the outer ring of the head part of the piston rod is circular; the outer ring of the eccentric compensation adjusting ring is attached to the mounting Kong Najuan of the movable plate frame, a gap is reserved between the inner ring of the eccentric compensation adjusting ring and the outer ring of the head part of the piston rod, and the head part of the piston rod can slightly deviate in the gap.
2. The ultra-high pressure elastic squeezer with balanced squeezing force and constant sealing force of a filter plate frame as claimed in claim 1, wherein the inner part of the peripheral frame of the bearing plate frame is provided with a process oil duct which is communicated with the inner part of the peripheral frame; the bottom of one side of the bearing plate frame is provided with a main inlet and a main outlet of the process oil duct, namely an oil inlet and return pipe joint; one or more groups of process oil inlets and outlets are formed in the cylinder body cylinder of each plunger cylinder, and each group comprises one process oil inlet on one side and one process oil outlet on the other side; the process oil inlet and outlet are communicated with a gap between the cylinder body and the plunger rod; the gap between the cylinder body and the plunger rod is a common oil inlet and return channel for each plunger cylinder; the cylinder bottom is internally provided with a cavity; certain gaps are reserved between the outer wall of the cylinder body and the bearing plate frame, and certain gaps are reserved between the bottom of the cylinder body and the bottom of the cylinder bottom and the bearing plate frame, and are communicated with each other and the cavity inside the cylinder bottom; these gaps and the cavity inside the cylinder bottom are the oil inlet and return channels of each plunger cylinder.
3. The ultra-high pressure elastic squeezer with balanced squeezing force and constant sealing force of a filter plate frame as claimed in claim 1, wherein a first wear-resistant ring is arranged at the joint of the outer wall of the plunger rod and the inner wall of the cylinder body and is used as a first-stage guide sleeve; a second wear-resistant ring is arranged at the joint of the inner wall of the cavity at the rear section of the plunger rod and the convex rod at the bottom of the cylinder and is used as a second-stage guide sleeve; the primary guide sleeve and the secondary guide sleeve adopt wear-resistant rings made of polyformaldehyde.
4. The ultra-high pressure elastic squeezer with balanced squeezing force and constant sealing force of a filter plate frame as claimed in claim 1, wherein the primary guide sleeve seat, namely the cylinder inner wall of the cylinder body, is composed of two circles of deep grooves and a circle of shallow inner protruding blocks in the middle, namely the primary guide sleeve seat is: a concave-convex structure formed by a circle of shallow inner convex blocks is arranged between the two circles of deep grooves; the second-stage guide sleeve seat, namely the inner wall of the cavity at the rear section of the plunger rod, is composed of two circles of deep grooves and a circle of shallow inner protruding blocks in the middle, namely the second-stage guide sleeve seat is: a concave-convex structure formed by a circle of shallow inner convex blocks is arranged between the two circles of deep grooves.
5. The ultra-high pressure elastic squeezer with balanced squeezing force and constant sealing force of a filter plate frame as claimed in claim 1, wherein the head of the piston rod is provided with a screw hole, the movable plate frame is also provided with a corresponding screw hole, the two screw holes, namely the screw hole of the piston rod and the screw hole of the movable plate frame are provided with connecting screws, and an anti-loosening spring washer is arranged between the connecting screws and the screw hole of the movable plate frame.
6. The ultra-high pressure elastic squeezer with balanced squeezing force and constant sealing force of a filter plate frame as claimed in claim 1, wherein a dustproof sealing ring is arranged at the joint of a cylinder opening of a cylinder body of a plunger cylinder and a bearing plate frame and a piston rod, and is used as the plunger cylinder for dust prevention.
7. The ultra-high pressure elastic squeezer with balanced squeezing force and constant sealing force of filter plate frame as claimed in claim 1, wherein an O-shaped sealing ring is arranged at the joint of the cylinder body of the plunger cylinder and the bearing plate frame and is used as the static sealing of the plunger cylinder.
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| CN201810790181.0A CN108635921B (en) | 2018-07-18 | 2018-07-18 | Ultra-high pressure elastic squeezer with balanced squeezing force and constant sealing force of filter plate frame |
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| CN109925771A (en) * | 2019-04-22 | 2019-06-25 | 重庆长能环境科技有限公司 | A kind of compressible oil cylinder sheet frame filter plate of super-pressure |
| CN113443807B (en) * | 2021-08-30 | 2021-11-19 | 天津市星拓科技发展有限公司 | High-pressure sealed filter plate unit structure and using method |
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