CN118718528A - A quick positioning structure for automatic backwashing filter - Google Patents

Abstract

The present invention relates to the field of filter technology, and more specifically to an automatic backwash filter rapid positioning structure, including a frame, a support, a jacket, a filter cylinder, a piston rod and an interface plate; the jacket is installed on the top of the frame through the support, and the filter cylinder is installed in the jacket; the side of the filter cylinder is provided with a cylinder discharge port and a cylinder feed port located at the same position. The present invention ensures high-precision assembly of the filter, enhances equipment stability and prolongs service life through hanging, tightening and calibration devices; the filter cylinder and the center lines of the hanging device and the inlet and outlet at the top of the jacket form parallel reference planes, and the tightening device on the side of the jacket closely cooperates with it to form another reference plane. The calibration device on the frame is connected to the piston rod to ensure that the center lines of the two are aligned. The three work together to achieve precise positioning of the filter cylinder and the jacket, improve filter performance, and ensure safe and environmentally friendly operation.

Description

A quick positioning structure for automatic backwashing filter

Technical Field

The invention relates to the technical field of filters, and more particularly to a quick positioning structure for an automatic backwashing filter.

Background Art

In modern industrial production and chemical process, filtration is a common separation technology used to remove solid particles or other impurities in liquids. Automatic backwash filters are widely used in various industries due to their high efficiency, low energy consumption and easy automation control. However, traditional automatic backwash filters face a series of challenges in design and manufacturing, especially in the filtration of high temperature, toxic or volatile liquids.

For example, in the production process of polyester fiber or lyocell fiber, the spinning liquid needs to be filtered to improve the product quality. These liquids usually contain a large number of solid particles and gel particles, and must be finely filtered to obtain qualified products. In this case, the traditional filter design is difficult to meet the continuous operation requirements under high temperature. As the filtered impurities accumulate on the filter net, the filter element will accelerate aging and damage, and needs to be replaced and cleaned frequently, increasing production costs. In addition, a large amount of heavy metal liquid and harmful gases will be discharged when cleaning the filter element, polluting the environment.

In another example, the solvent acetone used in the production process of acetate fiber is a volatile substance that is harmful to the human body and pollutes the environment. Filters working in this environment need to have extremely high sealing and safety to prevent toxic gas leakage. In order to solve these problems, a variety of automatic backwashing filters have appeared on the market, such as CN201820262020, a backwashing filter with a tightening device, and CN201720083051.4, a fully automatic backwashing filter. These filters adopt a cylinder-type structure and are suitable for high-temperature slurry filtration or filtration of volatile toxic slurry. However, these filters still have certain limitations in practical applications:

1. Assembly accuracy: It is difficult to ensure that the center of the filter cylinder and the center of the frame are completely aligned during the assembly process of traditional filters. This assembly deviation will not only lead to a decrease in filtering effect, but also increase the risk of wear and jamming of the piston rod, reducing the reliability and service life of the equipment;

2. Operational complexity: During on-site operation, the staff needs to spend a lot of time and energy to disassemble and adjust the filter cylinder, which not only reduces work efficiency, but may also damage the equipment due to improper operation;

3. Safety: When handling toxic or volatile liquids, loose assembly may cause toxic gas leakage, posing a serious threat to operators and causing environmental pollution.

Summary of the invention

The purpose of the present invention is to solve the above-mentioned technical problems. The present invention provides an automatic backwash filter quick positioning structure to solve the problems of poor assembly accuracy, complicated operation and low safety in the prior art. By introducing a suspension device, a tightening device and a calibration device, precise positioning between the filter cylinder and the frame is achieved, which can ensure the stable operation of the filter and extend the service life of the equipment, while also ensuring the personal safety of the operator and environmental protection.

In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

The invention proposes an automatic backwash filter quick positioning structure, comprising a frame, a support, a jacket, a filter cylinder, a piston rod and an interface plate; the jacket is installed on the top of the frame through the support, and the filter cylinder is installed in the jacket; the side of the filter cylinder is provided with a cylinder discharge port and a cylinder feed port located at the same position; the jacket is provided with a jacket discharge port and a jacket feed port, and these two ports are respectively aligned with and communicated with the cylinder discharge port and the cylinder feed port of the filter cylinder; an interface plate is provided in the jacket, and the interface plate is located between the cylinder discharge port, the jacket discharge port, the cylinder feed port and the jacket feed port, and is communicated with these ports; a piston rod is provided in the filter cylinder, and the piston rod can move freely up and down at the bottom of the jacket; wherein, it also includes a suspension device, at least two tightening devices and a calibration device; the assembly reference surfaces of the filter cylinder and the jacket are positioned and overlapped under the three-point positioning action of the suspension device, the at least two tightening devices and the calibration device;

The upper part of the filter cylinder is suspended on the top of the jacket through a suspension device, and the suspension device and the cylinder discharge port are arranged parallel to each other with respect to the transverse center line of their respective vertical height directions; the suspension device and the cylinder discharge port together form a parallel plane with respect to the transverse center line of their respective vertical height directions, and the parallel plane is the assembly reference plane of the filter cylinder;

At least two jacking devices are provided on one side of the jacket away from the interface plate, the jacking devices are in contact and connected with the surface of the filter cylinder, and the jacking devices and the cylinder discharge port are arranged parallel to or coincide with each other in terms of their respective transverse center lines in the vertical height direction; the jacking devices and the cylinder discharge port together form a parallel plane in terms of their respective transverse center lines in the vertical height direction, and the parallel plane is the assembly reference plane of the jacket;

The frame is provided with a calibration device, which is connected and matched with the piston rod. The calibration device is used to concentrically position the piston rod and the frame so that the vertical center lines of their respective transverse length directions coincide with each other.

As a preferred technical solution of the present invention, the suspension device includes two suspension pins, a first fastening screw, a pressure plate and a suspension seat;

Two suspension pins are fixedly connected to the upper two sides of the filter cylinder body and are symmetrically arranged. The suspension pins are located directly above the cylinder body discharge port, and the suspension pins and the cylinder body discharge port are arranged parallel to each other with respect to the horizontal center lines of their respective vertical height directions;

The suspension seat is fixedly connected to the top of the jacket, and the suspension seat is plug-fitted with the suspension pin;

The pressure plate is screwed onto the top of the suspension seat by a first fastening screw.

As a preferred technical solution of the present invention, the suspension pin is cylindrical, that is, the hole between the suspension seat and the pressure plate is a circular hole that is inserted into the cylindrical hole.

As a preferred technical solution of the present invention, the length of the suspension pin extending out of the suspension seat away from the side of the filter cylinder body is 15-50 mm.

As a preferred technical solution of the present invention, the tightening device includes a flange seat, a tightening rod, a second fastening screw and a tightening flange; the flange seat is arranged on the side of the jacket; the tightening rod passes through the side of the jacket and can move freely left and right on the side of the jacket; one end of the tightening rod is in contact with and connected to the surface of the filter cylinder body, and the other end of the tightening rod is equipped with a tightening flange; the tightening flange is fastened to the flange seat by the second fastening screw.

As a preferred technical solution of the present invention, a guide groove is further provided at the lower part of the filter cylinder body, and the jacking rod is inserted into the guide groove; the shape of the guide groove is an inverted "U" shape, and the depth of the guide groove is 15-40mm.

As a preferred technical solution of the present invention, the tightening rod is cylindrical, and is also provided with a cylindrical hole, a cylindrical rod is also provided in the cylindrical hole, and the tightening flange can also be fastened to the cylindrical rod by a second fastening screw; the inner diameter of the cylindrical hole is larger than the outer diameter of the tightening rod by 0-1mm.

As a preferred technical solution of the present invention, a sewage outlet is provided at the lower part of the piston rod, wherein an annular groove is also provided at the bottom end of the piston rod, the annular groove is located above the sewage outlet, and the piston rod is equipped with a piston seat with a clearance fit, and the piston seat is located above the annular groove;

The calibration device includes a bracket, two semicircular snap rings, snap ring end covers, guide rail sliders and linear guide rails; the linear guide rails are arranged in the frame and below the jacket, the four corners of the bracket are slidably connected to the linear guide rails through the guide rail sliders, and the vertical center lines of the bracket and the jacket about their respective transverse length directions coincide;

The two semicircular snap rings cooperate with each other to form a complete snap ring and annular groove clearance fit;

A fixing hole is provided in the middle of the bracket, and two symmetrically arranged U-shaped holes are provided inside the fixing hole;

The piston seat is provided with a U-shaped block which is clearance-matched with the U-shaped hole; the U-shaped block is fastened and connected to the U-shaped hole by a third fastening screw;

The snap ring end cover and the fixing hole have clearance matching; the complete snap ring formed by two semicircular snap rings has clearance matching inside the snap ring end cover;

The snap ring end cover and the piston seat are both provided with multiple and equal number of screw holes at equal intervals;

The piston seat and the screw hole of the snap ring end cover are fastened and connected by multiple bolts;

The fixing hole of the piston seat provided in the bracket has an eccentric adjustment of 2-10 mm, preferably 5 mm;

The complete snap ring and the annular groove are clearance-matched, and the inner hole clearance is 50-500 microns, preferably 200 microns; the outer cylindrical surface of the complete snap ring and the inner hole diameter of the concave groove of the snap ring end cover are clearance-matched 50-500 microns, preferably 200 microns.

As a preferred technical solution of the present invention, the piston rod is provided with a sewage outlet, and is also equipped with a transfer seat connected to the sewage outlet, wherein the outer surface of the transfer seat is sleeved with a piston seat with a clearance fit; the outer surface of the transfer seat is provided with an annular groove;

The calibration device includes a bracket, two semicircular clamping rings, a guide rail slider and a linear guide rail; the linear guide rail is arranged in the frame and below the jacket, and the four corners of the bracket are slidably connected to the linear guide rail through the guide rail slider, and the vertical center lines of the bracket and the jacket about their respective transverse length directions coincide;

A fixing hole is provided in the middle of the bracket, and two symmetrically arranged U-shaped holes are provided inside the fixing hole;

The piston seat is provided with a U-shaped block which is clearance-matched with the U-shaped hole; the U-shaped block is fastened and connected to the U-shaped hole by a third fastening screw;

The two semicircular snap rings cooperate with each other to form a complete snap ring and annular groove clearance fit;

The complete snap ring formed by two semicircular snap rings is inserted into the piston seat and has clearance fit;

The complete snap ring formed by the two semicircular snap rings and the piston seat are both provided with multiple and equal number of screw holes at equal intervals;

The complete snap ring formed by the two semicircular snap rings is fastened and connected to the screw hole of the piston seat by a plurality of bolts;

The piston seat is inserted into the fixing hole and has clearance fit;

The inner hole and end face of the complete snap ring are clearance-matched with the annular groove, the inner hole clearance is 50-500 microns, preferably 200 microns, and the clearance between the end face of the snap ring and the inner side face of the annular groove is 50-300 microns, preferably 100 microns.

As a preferred technical solution of the present invention, the cylinder body feed port and the cylinder body discharge port each have a cylindrical sealing ring, and there are annular sealing rings on both sides of the sealing ring. The cross-section of the sealing ring is "O"-shaped, rectangular or other shapes, preferably "O"-shaped, rectangular structure, and the material can be selected from non-metallic materials such as rubber, PTFE, or metal materials such as aluminum, aluminum alloy, copper, copper alloy, stainless steel, etc.

As a preferred technical solution of the present invention, the cylindrical rod preferably has an inner diameter of 14 mm; the outer diameter of the tightening rod is smaller than the guide groove width by 0-2 mm, preferably by 1 mm.

As a preferred technical solution of the present invention, the support has a rectangular hole, and is fixed to the frame by screws through the rectangular hole. Each jacket support has 1-4 adjustment screws, preferably 2.

As a preferred technical solution of the present invention, the U-shaped hole is perpendicular to the U-shaped block in the length direction.

As a preferred technical solution of the present invention, the number of screw holes is 4-8, preferably 6.

In any of the above-mentioned rapid positioning structures, a hanging ring is provided at the middle of the top of the filter cylinder.

The beneficial effects of the present invention are as follows:

The present invention improves the assembly accuracy of the filter through precise suspension, tightening and calibration devices, and ensures the stable operation and extended service life of the equipment. Specifically, the filter cylinder is suspended on the top of the jacket by a suspension device, and a parallel plane is formed between the two as an assembly reference plane. A plurality of tightening devices are provided on one side of the jacket, and these devices are closely matched with the surface of the filter cylinder to jointly form another parallel plane as an assembly reference plane. A calibration device is installed on the frame and connected to the piston rod to ensure that the vertical center lines of the two in the horizontal length direction are accurately aligned, thereby realizing three-point positioning of the filter cylinder and the jacket, so that their assembly reference planes remain consistent and coincide. This positioning structure not only improves the overall performance of the filter, including filtration efficiency and durability, but also effectively ensures the safety of operators and environmental protection.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the exploded three-dimensional structure of the filter cylinder and the jacket of the present invention;

Figure 2 is a schematic cross-sectional view of the structure of Figure 1 after assembly of the present invention;

FIG3 is a schematic diagram of the assembly structure of the calibration device and the piston rod of the first embodiment of the present invention;

FIG4 is a schematic diagram of a second calibration device and piston rod assembly structure of the present invention;

FIG5 is a schematic diagram of the three-dimensional structure of the jacket of the present invention when viewed from bottom;

FIG. 6 is a schematic diagram of the three-dimensional structure of FIG. 1 of the present invention after the jacket is removed.

Reference numerals: 1, frame; 2, lifting ring; 3, support; 4, jacket; 5, filter cylinder; 51, cylinder discharge port; 52, cylinder feed port; 6, suspension device; 61, suspension pin; 62, first fastening screw; 63, pressure plate; 64, suspension seat; 7, tightening device; 71, guide groove; 72, flange seat; 73, tightening rod; 74, second fastening screw; 75, tightening flange; 76, cylindrical hole; 77. Cylindrical rod; 8. Calibration device; 81. Bracket; 82. Semicircular retaining ring; 83. Retaining ring end cover; 84. Screw hole; 85. Fixing hole; 86. U-shaped hole; 87. Guide rail slider; 88. Linear guide; 9. Piston rod; 91. Piston seat; 92. Third fastening screw; 93. Annular groove; 94. U-shaped block; 95. Drain port; 96. Adapter seat; 10. Jacket outlet; 11. Interface plate; 12. Jacket inlet.

DETAILED DESCRIPTION

As shown in Figure 1, Figure 2, Figure 5, and Figure 6;

The present invention provides an automatic backwash filter quick positioning structure, comprising a frame 1, a support 3, a jacket 4, a filter cylinder 5, a piston rod 9 and an interface plate 11; the jacket 4 is installed on the top of the frame 1 through the support 3, and the filter cylinder 5 is installed in the jacket 4; the side of the filter cylinder 5 is provided with a cylinder discharge port 51 and a cylinder feed port 52 located at the same position; the jacket 4 is provided with a jacket discharge port 10 and a jacket feed port 12, and these two ports are respectively aligned with and communicated with the cylinder discharge port 51 and the cylinder feed port 52 of the filter cylinder 5; the jacket 4 is provided with an interface plate 11, and the interface plate 11 is located between the cylinder discharge port 51, the jacket discharge port 10, the cylinder feed port 52, and the jacket feed port 12, and is communicated with these ports; the filter cylinder 5 is provided with a piston rod 9, and the piston rod 9 can move freely up and down at the bottom of the jacket 4;

Among them, it also includes a suspension device 6, at least two tightening devices 7 and a calibration device 8; the assembly reference surfaces of the filter cylinder 5 and the jacket 4 are positioned and overlapped under the three-point positioning action of the suspension device 6, at least two tightening devices 7 and the calibration device 8;

The upper part of the filter cylinder 5 is suspended on the top of the jacket 4 by a suspension device 6, and the suspension device 6 and the cylinder discharge port 51 are arranged parallel to each other with respect to the transverse center line of their respective vertical height directions; the suspension device 6 and the cylinder discharge port 51 together form a parallel plane with respect to the transverse center line of their respective vertical height directions, and the parallel plane is the assembly reference plane of the filter cylinder 5;

At least two jacking devices 7 are provided on the side of the jacket 4 away from the interface plate 11, and the jacking devices 7 are in contact with and connected to the surface of the filter cylinder 5, and the jacking devices 7 and the cylinder discharge port 51 are arranged parallel to or coincide with each other with respect to the transverse center lines of their respective vertical height directions; the jacking devices 7 and the cylinder discharge port 51 together form a parallel plane with respect to the transverse center lines of their respective vertical height directions, and the parallel plane is the assembly reference plane of the jacket 4;

The frame 1 is provided with a calibration device 8, which is connected and matched with the piston rod 9, and the calibration device 8 is used to concentrically position the piston rod 9 and the frame 1 so that the vertical center lines of their respective transverse length directions coincide with each other;

Among them, the cylinder body feed port and the cylinder body discharge port each have a cylindrical sealing ring, and there are annular sealing rings on both sides of the sealing ring. The cross section of the sealing ring is "O" shaped, rectangular or other shapes, preferably "O" shaped, rectangular structure, and the material can be selected from non-metallic materials such as rubber, PTFE, or metal materials such as aluminum, aluminum alloy, copper, copper alloy, stainless steel, etc.;

The support has a rectangular hole, through which it is fixed to the frame with screws, and each jacket support has 1-4 adjusting screws, preferably 2.

Working principle: First, the jacket 4 is installed on the top of the frame 1 through the support 3, and the filter cylinder 5 is installed inside the jacket 4. The side of the filter cylinder 5 has two openings at the same horizontal position - the cylinder discharge port 51 and the cylinder feed port 52. The jacket 4 also has two openings correspondingly - the jacket discharge port 10 and the jacket feed port 12. These openings correspond to each other and are connected through the interface plate 11. The interface plate 11 is located between the cylinder discharge port 51 and the jacket discharge port 10 of the filter cylinder 5, and between the cylinder feed port 52 and the jacket feed port 12 of the filter cylinder 5;

A piston rod 9 capable of moving up and down is provided inside the filter cylinder 5, and the piston rod 9 can move freely at the bottom of the jacket 4;

In order to achieve accurate positioning of the filter cylinder 5 and the jacket 4, the present invention introduces a suspension device 6, at least two tightening devices 7 and a calibration device 8, which work together to ensure that the assembly reference surfaces of the filter cylinder 5 and the jacket 4 can be accurately positioned and kept in overlap;

The suspension device 6 suspends the upper part of the filter cylinder 5 on the top of the jacket 4, and the suspension device 6 and the cylinder discharge port 51 are parallel to each other along the horizontal center line of their respective vertical height directions. This arrangement allows the center lines of the suspension device 6 and the cylinder discharge port 51 to form a parallel plane together, which serves as the assembly reference plane of the filter cylinder 5;

At least two jacking devices 7 are provided on one side of the jacket 4, away from the interface plate 11. These jacking devices 7 are in contact with the surface of the filter cylinder 5 and are tightly matched. The jacking devices 7 and the cylinder discharge port 51 are also in a parallel state directly above each other along their respective transverse center lines in the vertical height direction, or completely overlap. In this way, the center lines of the jacking devices 7 and the cylinder discharge port 51 jointly form another parallel plane, which serves as the assembly reference plane of the jacket 4.

Finally, a calibration device 8 is provided on the frame 1, and the calibration device 8 is connected and used in conjunction with the piston rod 9. The function of the calibration device 8 is to ensure that the vertical center lines of the piston rod 9 and the frame 1 in their respective transverse length directions can accurately coincide with each other;

Through such a design, the filter cylinder 5 and the jacket 4 can achieve three-point positioning under the coordinated action of the suspension device 6, the tightening device 7 and the calibration device 8, thereby ensuring that their assembly reference surfaces remain consistent and coincide. This positioning structure not only improves the assembly accuracy of the filter, but also ensures the stable operation of the filter and the service life of the equipment. At the same time, due to the precise assembly of the filter, the personal safety of the operator and the protection of the environment are also effectively guaranteed.

As shown in FIG1 , the suspension device 6 includes two suspension pins 61 , a first fastening screw 62 , a pressure plate 63 and a suspension seat 64 ;

Two suspension pins 61 are respectively fixed to the upper two sides of the filter cylinder 5 and are symmetrically arranged. The suspension pins 61 are located directly above the cylinder discharge port 51, and the suspension pins 61 and the cylinder discharge port 51 are arranged parallel to each other with respect to the horizontal center lines of their respective vertical height directions.

The suspension seat 64 is fixedly connected to the top of the jacket 4, and the suspension seat 64 is plug-fitted with the suspension pin 61;

The pressure plate 63 is screwed to the top of the suspension seat 64 by the first fastening screw 62;

The suspension pin 61 is cylindrical, that is, the hole between the suspension seat 64 and the pressure plate 63 is a circular hole that is mutually inserted with the cylindrical hole;

The length of the suspension pin 61 extending out of the suspension seat 64 away from the side of the filter cylinder body 5 is 15-50 mm.

The working principle of the suspension device 6 is as follows:

When the filter cylinder 5 needs to be installed, firstly use a lifting device (such as a crane) to hang the top middle part of the filter cylinder 5, then vertically lift the filter cylinder 5 and move it to just above the jacket 4, then rotate the filter cylinder 5 so that the cylinder discharge port 51 and the cylinder feed port 52 and the jacket discharge port 10 and the jacket feed port 12 are aligned, that is, the interface plate 11 is also aligned;

Continue to move the filter cylinder 5 downward until the suspension pins 61 on the upper part of the filter cylinder 5 are simultaneously placed in the "U"-shaped suspension seats 64 on both sides of the jacket 4. In this process, the suspension pins 61 of the filter cylinder 5 and the suspension seats 64 of the jacket 4 are fitted together by insertion to ensure that the filter cylinder 5 will not deviate in the vertical direction.

In this way, the assembly reference surfaces of the filter cylinder 5 and the jacket 4 are accurately positioned and kept in overlap under the joint action of the suspension device 6, at least two jacking devices 7 and the calibration device 8. The two suspension pins 61 of the suspension device 6 are located on both sides of the upper part of the filter cylinder 5, are symmetrically arranged, and are at the same vertical height as the cylinder discharge port 51. This design ensures that the plane formed by the center line of the suspension pin 61 and the cylinder discharge port 51 serves as the assembly reference surface of the filter cylinder 5.

The suspension seat 64 is fixed on the top of the jacket 4 and is inserted and matched with the suspension pin 61. The pressure plate 63 is fastened to the top of the suspension seat 64 by the first fastening screw 62 to fix the suspension pin 61. The cylindrical design of the suspension pin 61 makes the hole between the suspension seat 64 and the pressure plate 63 a circular hole that is inserted into each other. The length of the part of the suspension pin 61 that exceeds the suspension seat 64 is 15-50mm. Such a size arrangement is to ensure that the suspension pin 61 has enough space to move up and down after being inserted into the suspension seat 64, so as to facilitate the accurate alignment and installation of the filter cylinder 5;

In general, the setting of the suspension device 6 not only provides sufficient supporting force to hang the filter cylinder 5, but also ensures that the position of the filter cylinder 5 in the vertical direction is accurate, laying a foundation for the subsequent operation of the tightening device 7 and the calibration device 8.

As shown in Fig. 2 and Fig. 6, the tightening device 7 includes a flange seat 72, a tightening rod 73, a second fastening screw 74 and a tightening flange 75; the flange seat 72 is arranged on the side of the jacket 4; the tightening rod 73 passes through the side of the jacket 4 and can freely move left and right on the side of the jacket 4; one end of the tightening rod 73 is in contact with the surface of the filter cylinder 5, and the other end of the tightening rod 73 is equipped with a tightening flange 75; the tightening flange 75 is fastened to the flange seat 72 by the second fastening screw 74; the lower part of the filter cylinder 5 is also provided with a guide groove 71, and the tightening rod 73 is plug-fitted with the guide groove 71; the shape of the guide groove 71 is an inverted "U" shape, and the depth of the guide groove 71 is 15-40mm;

The lower part of the filter cylinder 5 is also provided with a guide groove 71, and the push rod 73 is inserted into the guide groove 71; the shape of the guide groove 71 is an inverted "U" shape, and the depth of the guide groove 71 is 15-40mm;

The clamping rod 73 is cylindrical and is provided with a cylindrical hole 76. A cylindrical rod 77 is provided in the cylindrical hole 76. The clamping flange 75 can also be fastened to the cylindrical rod 77 by a second fastening screw 74. The inner diameter of the cylindrical hole 76 is 0-1 mm larger than the outer diameter of the clamping rod 73.

The cylindrical rod preferably has an inner diameter of 14 mm; the outer diameter of the tightening rod is 0-2 mm smaller than the width of the guide groove, preferably 1 mm;

The working principle of the tightening device 7 is as follows:

The flange seat 72 is installed on the side of the jacket 4, and the jacking rod 73 passes through one side of the jacket 4 and can move freely left and right on the side of the jacket 4. One end of the jacking rod 73 is in contact with the surface of the filter cylinder 5, and the other end is installed with a jacking flange 75, which is fastened to the flange seat 72 by a second fastening screw 74. The second fastening screw 74 on the jacking flange 75 is screwed in and out on the flange seat 72, which can push the jacking rod flange seat 72, that is, adjust the position of the filter cylinder 5.

A guide groove 71 is provided at the lower part of the filter cylinder 5, and the jacking rod 73 is inserted into the guide groove 71. The guide groove 71 is in an inverted "U" shape, and its depth is 15-40mm. Such a design ensures that the jacking rod 73 can be guided to accurately enter the guide groove 71 while moving along a straight line, and plays a role in positioning and guiding during the installation process;

The cylindrical design of the jacking rod 73 allows it to slide smoothly in the guide groove 71 without being affected by other factors. In addition, the jacking rod 73 is also provided with a cylindrical hole 76, and a cylindrical rod 77 is provided in the cylindrical hole 76. The jacking flange 75 can be fastened to the cylindrical rod 77 by a second fastening screw 74. The inner diameter of the cylindrical hole 76 is slightly smaller than the outer diameter of the jacking rod 73. Such a design helps to improve the stability and reliability of the jacking device 7.

During the filter clamping operation, the second fastening screws 74 of the upper and lower tightening devices on the jacket 4 are tightened respectively. As the screws are tightened, the tightening flange 75 pushes the tightening rod 73 to move into the jacket 4. During the movement, the tightening rod 73 pushes the outer side surfaces of the sealing rings on the feed port and the discharge port of the filter cylinder 5 to be close to the interface plate surface of the jacket 4.

Since the distance between the connection surface of the interface plate 11 and the filter cylinder 5 and the center of the jacket 4 is equal to the distance between the outer side of the sealing ring of the filter cylinder 5 and the center of the filter cylinder 5, and the coincidence of the center of the jacket 4 and the center of the frame 1 has been completed during the equipment assembly, the center of the filter cylinder 5 and the center of the jacket 4 also coincide with each other at this time. This precise center positioning ensures the stability of the filter cylinder 5 and the jacket 4 during operation, and avoids the decrease in filtration efficiency and other potential problems caused by center deviation;

In summary, the design of the tightening device 7 not only provides the necessary pressure to fix the filter cylinder 5, but also ensures the accurate positioning of the filter cylinder 5 in the horizontal direction, further enhancing the overall performance and reliability of the filter.

As shown in Figures 3 and 4, the structures of two calibration devices are shown respectively;

FIG3 shows the first type, in which a sewage outlet 95 is provided at the lower part of the piston rod 9, wherein an annular groove 93 is also provided at the bottom end of the piston rod 9, and the annular groove 93 is located above the sewage outlet 95. The piston rod 9 is equipped with a piston seat 91 with a clearance fit, and the piston seat 91 is located above the annular groove 93;

The calibration device 8 includes a bracket 81, two semicircular snap rings 82, snap ring end covers 83, guide rail sliders 87 and linear guide rails 88; the linear guide rails 88 are arranged in the frame 1 and below the jacket 4, and the four corners of the bracket 81 are slidably connected to the linear guide rails 88 through the guide rail sliders 87, and the vertical center lines of the bracket 81 and the jacket 4 about their respective transverse length directions coincide;

The two semicircular snap rings 82 cooperate with each other to form a complete snap ring and a clearance fit with the annular groove 93;

A fixing hole 85 is provided in the middle of the bracket 81, and two symmetrically arranged U-shaped holes 86 are provided inside the fixing hole 85;

The piston seat 91 is provided with a U-shaped block 94 which is in clearance fit with the U-shaped hole 86; the U-shaped block 94 is fastened to the U-shaped hole 86 by a third fastening screw 92;

The snap ring end cover 83 is in clearance fit with the fixing hole 85; the complete snap ring formed by the two semicircular snap rings 82 is in clearance fit with the inner part of the snap ring end cover 83;

The snap ring end cover 83 and the piston seat 91 are both provided with a plurality of screw holes 84 of the same number and spacing;

The piston seat 91 is fastened to the screw hole 84 of the snap ring end cover 83 by a plurality of bolts;

The fixing hole of the piston seat provided in the bracket has an eccentric adjustment of 2-10 mm, preferably 5 mm;

The complete snap ring and the annular groove are clearance-matched, and the inner hole clearance is 50-500 microns, preferably 200 microns; the outer cylindrical surface of the complete snap ring and the inner hole diameter of the concave groove of the snap ring end cover are clearance-matched 50-500 microns, preferably 200 microns;

First, the working principle of the calibration device 8 is as follows:

The two semicircular snap rings 82 are directly inserted into the annular groove 93, and the snap ring end cover 83 is directly upward to form a complete snap ring clamp with the two semicircular snap rings 82. The piston seat 91 and the snap ring end cover 83 are fixed together with bolts, and the bracket 81 is supported upward so that the fixing hole 85 and the snap ring end cover 83 are fixed; at this time, the U-shaped block 94 is stuck with the U-shaped hole 86, and then fixed with the third fastening screw 92.

FIG4 shows the second type, in which the piston rod 9 is provided with a sewage outlet 95, and is also equipped with an adapter seat 96 connected to the sewage outlet 95, wherein the outer surface of the adapter seat 96 is sleeved with a piston seat 91 with a clearance fit; and the outer surface of the adapter seat 96 is provided with an annular groove 93;

The calibration device 8 includes a bracket 81, two semicircular snap rings 82, a guide rail slider 87 and a linear guide rail 88; the linear guide rail 88 is arranged in the frame 1 and is located below the jacket 4. The four corners of the bracket 81 are slidably connected to the linear guide rail 88 through the guide rail slider 87, and the vertical center lines of the bracket 81 and the jacket 4 in their respective transverse length directions coincide with each other;

A fixing hole 85 is provided in the middle of the bracket 81, and two symmetrically arranged U-shaped holes 86 are provided inside the fixing hole 85;

The piston seat 91 is provided with a U-shaped block 94 which is in clearance fit with the U-shaped hole 86; the U-shaped block 94 is fastened to the U-shaped hole 86 by a third fastening screw 92;

The two semicircular snap rings 82 cooperate with each other to form a complete snap ring and a clearance fit with the annular groove 93;

The complete snap ring formed by the two semicircular snap rings 82 is inserted into the piston seat 91 and has clearance fit;

The complete snap ring formed by the two semicircular snap rings 82 and the piston seat 91 are both provided with multiple and equal number of screw holes 84 at equal intervals;

The complete snap ring formed by the two semicircular snap rings 82 is fastened to the screw hole 84 of the piston seat 91 by a plurality of bolts;

The piston seat 91 is inserted into the fixing hole 85 and has clearance fit;

The inner hole and end face of the complete snap ring are clearance-matched with the annular groove, the inner hole clearance is 50-500 microns, preferably 200 microns, and the clearance between the end face of the snap ring and the inner side face of the annular groove is 50-300 microns, preferably 100 microns.

The two semicircular retaining rings 82 are directly inserted into the annular groove 93, and the piston seat 91 is directly upwardly clamped with the complete retaining ring formed by the two semicircular retaining rings 82, and the piston seat 91 is fixed together with the piston seat 91 by bolts, and the bracket 81 is supported upward so that the fixing hole 85 and the piston seat 91 are fixed; at this time, the U-shaped block 94 is clamped with the U-shaped hole 86, and then fixed with the third fastening screw 92;

In the above, the two calibration devices 8 respectively make different structural changes to the piston rod 9 in different states (only the sewage outlet 95 or the sewage outlet 95 with the adapter 96), but the principles are the same:

Since the inside of the filter cylinder is filled with high-pressure liquid, in the working state, the piston rod 9 generates a downward thrust on the bracket 81. During the up and down movement of the piston rod 9, the piston rod 9 and the piston seat 91, the piston seat 91 and the snap ring end cover 83 (or the complete snap ring formed by two semicircular snap rings 82) are always supported on one side. This eliminates the positioning tolerance caused by clearance fit, ensures that the vertical center lines of the piston rod 9 and the frame 1 in their respective transverse length directions can accurately coincide, and thus achieves concentric positioning in the three-point positioning, ensuring that their assembly reference surfaces remain consistent and coincide. The clearance fit between the complete snap ring formed by the two semicircular snap rings 82 and the piston rod 9 and the snap ring end cover 83 (or the complete snap ring formed by the two semicircular snap rings 82 and the piston rod 9, piston seat 91) can offset the coaxiality tolerance between the center of the filter cylinder 5 and the center of the frame 1.

In any of the above-mentioned rapid positioning structures, a lifting ring 2 is provided at the middle of the top of the filter cylinder 5, which can facilitate rapid lifting by a lifting device (such as a crane).

The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims (9)

1. An automatic back flushing filter quick positioning structure comprises a frame (1), a support (3), a jacket (4), a filtering cylinder body (5), a piston rod (9) and an interface board (11); the jacket (4) is arranged at the top of the frame (1) through the support (3), and the filtering cylinder body (5) is arranged in the jacket (4); the side part of the filtering cylinder body (5) is provided with a cylinder body discharge hole (51) and a cylinder body feed hole (52) which are positioned at the same position; the jacket (4) is provided with a jacket discharge port (10) and a jacket feed port (12), and the two ports are respectively communicated with a cylinder discharge port (51) and a cylinder feed port (52) of the filtering cylinder (5); an interface plate (11) is arranged in the jacket (4), and the interface plate (11) is positioned among the cylinder body discharge port (51), the jacket discharge port (10), the cylinder body feed port (52) and the jacket feed port (12) and is communicated with the ports; a piston rod (9) is arranged in the filtering cylinder body (5), and the piston rod (9) can move up and down freely at the bottom of the jacket (4);

The device is characterized by further comprising a suspension device (6), at least two jacking devices (7) and a calibration device (8); the assembly datum planes of the filtering cylinder body (5) and the jacket (4) realize positioning and superposition under the three-point positioning action of the suspension device (6), the at least two jacking devices (7) and the calibration device (8);

The upper part of the filtering cylinder body (5) is hung on the top of the jacket (4) through a hanging device (6), and the hanging device (6) and a cylinder body discharging hole (51) are arranged in parallel right above and below with respect to the transverse center line of the vertical height direction; the suspension device (6) and the cylinder body discharge hole (51) form a parallel surface together about the transverse central lines of the vertical height directions, and the parallel surface is an assembly reference surface of the filtering cylinder body (5);

At least two jacking devices (7) are arranged on one side, far away from the interface board (11), of the jacket (4), the jacking devices (7) are in contact connection and fit with the surface of the filtering cylinder body (5), and the jacking devices (7) and the cylinder body discharge holes (51) are arranged in parallel or coincide in the right-upper-lower direction relative to the transverse center lines of the respective vertical height directions; the jacking device (7) and the cylinder body discharge hole (51) form a parallel surface together about the transverse central lines of the vertical height directions, and the parallel surface is an assembly reference surface of the jacket (4);

The machine frame (1) is provided with a calibrating device (8), the calibrating device (8) is connected and matched with the piston rod (9), and the calibrating device (8) is used for concentrically positioning the piston rod (9) and the machine frame (1) to coincide with each other about the vertical center line of the transverse length direction.

2. The quick positioning structure of an automatic backwash filter according to claim 1, wherein the suspension device (6) comprises two suspension pins (61), a first fastening screw (62), a pressing plate (63) and a suspension seat (64);

Two suspension pins (61) are fixedly connected to two sides of the upper part of the filtering cylinder body (5) respectively and are symmetrically arranged, the suspension pins (61) are positioned right above the cylinder body discharge hole (51), and the suspension pins (61) and the cylinder body discharge hole (51) are arranged in parallel right above and below with respect to the transverse center line of the vertical height direction;

The hanging seat (64) is fixedly connected to the top of the jacket (4), and the hanging seat (64) is in insertion fit with the hanging pin (61);

The pressing plate (63) is screwed on the top of the hanging seat (64) through a first fastening screw (62).

3. The rapid positioning structure of an automatic back flushing filter according to claim 2, wherein the hanging pin (61) is cylindrical, i.e. the hole between the hanging seat (64) and the pressing plate (63) is a circular hole which is mutually inserted with the cylindrical shape.

4. The quick positioning structure of an automatic back flushing filter according to claim 1, wherein the propping device (7) comprises a flange seat (72), a propping rod (73), a second fastening screw (74) and a propping flange (75); the flange seat (72) is arranged at the side part of the jacket (4); the jacking rod (73) penetrates through the side part of the jacket (4) and can freely move left and right at the side part of the jacket (4); one end part of the jacking rod (73) is in contact connection with the surface of the filtering cylinder body (5), and the other end part of the jacking rod (73) is provided with a jacking flange (75); the jacking flange (75) is fixedly connected with the flange seat (72) through a second fastening screw (74).

5. The rapid positioning structure of an automatic back flushing filter according to claim 4, wherein the lower part of the filtering cylinder body (5) is further provided with a guide groove (71), and the pushing rod (73) is in insertion fit with the guide groove (71).

6. The quick positioning structure of an automatic backwash filter according to claim 4, wherein the tightening rod (73) is cylindrical, the tightening rod (73) is further provided with a cylindrical hole (76), the cylindrical hole (76) is further internally provided with a cylindrical rod (77), and the tightening flange (75) is further fastened and connected with the cylindrical rod (77) through a second fastening screw (74).

7. The rapid positioning structure of an automatic backwashing filter according to claim 1, wherein a drain outlet (95) is arranged at the lower part of the piston rod (9), and the rapid positioning structure is characterized in that an annular groove (93) is further arranged at the bottom end of the piston rod (9), the annular groove (93) is positioned above the drain outlet (95), the piston rod (9) is provided with a clearance fit piston seat (91), and the piston seat (91) is positioned above the annular groove (93);

The calibrating device (8) comprises a bracket (81), two semicircular clamping rings (82), a clamping ring end cover (83), a guide rail sliding block (87) and a linear guide rail (88); the linear guide rail (88) is arranged in the frame (1) and is positioned below the jacket (4), four corners of the bracket (81) are in sliding connection with the linear guide rail (88) through guide rail sliding blocks (87), and the vertical central lines of the bracket (81) and the jacket (4) in the respective transverse length directions are overlapped;

The two semicircular clamping rings (82) are mutually matched to form a complete clamping ring which is in clearance fit with the annular groove (93);

the middle part of the bracket (81) is provided with a fixing hole (85), and two U-shaped holes (86) which are symmetrically arranged are arranged on the inner side of the fixing hole (85);

The piston seat (91) is provided with a U-shaped block (94) which is in clearance fit with the U-shaped hole (86); the U-shaped block (94) is fixedly connected with the U-shaped hole (86) through a third fastening screw (92);

The snap ring end cover (83) is in clearance fit with the fixing hole (85); the complete clamping ring formed by the two semicircular clamping rings (82) is in clearance fit with the clamping ring end cover (83);

the clamping ring end cover (83) and the piston seat (91) are respectively provided with a plurality of equally-spaced screw holes (84) with the same number;

The piston seat (91) is fixedly connected with the screw hole (84) of the snap ring end cover (83) through a plurality of bolts.

8. The rapid positioning structure of an automatic backwash filter according to claim 1, wherein the piston rod (9) is provided with a drain outlet (95) and is further provided with an adapter seat (96) communicated with the drain outlet (95), characterized in that the outer surface of the adapter seat (96) is sleeved with a piston seat (91) in clearance fit; an annular groove (93) is arranged on the outer surface of the adapter seat (96);

The calibrating device (8) comprises a bracket (81), two semicircular clamping rings (82), a guide rail sliding block (87) and a linear guide rail (88); the linear guide rail (88) is arranged in the frame (1) and is positioned below the jacket (4), four corners of the bracket (81) are in sliding connection with the linear guide rail (88) through guide rail sliding blocks (87), and the vertical central lines of the bracket (81) and the jacket (4) in the respective transverse length directions are overlapped;

the middle part of the bracket (81) is provided with a fixing hole (85), and two U-shaped holes (86) which are symmetrically arranged are arranged on the inner side of the fixing hole (85);

The piston seat (91) is provided with a U-shaped block (94) which is in clearance fit with the U-shaped hole (86); the U-shaped block (94) is fixedly connected with the U-shaped hole (86) through a third fastening screw (92);

The two semicircular clamping rings (82) are mutually matched to form a complete clamping ring which is in clearance fit with the annular groove (93);

The complete clamping ring formed by the two semicircular clamping rings (82) is inserted into and in clearance fit with the piston seat (91);

a plurality of equally-spaced screw holes (84) with the same number are arranged in the complete clamping ring formed by the two semicircular clamping rings (82) and the piston seat (91);

The complete clamping ring formed by the two semicircular clamping rings (82) is fixedly connected with the screw hole (84) of the piston seat (91) through a plurality of bolts;

the piston seat (91) is inserted into the fixing hole (85) and is in clearance fit with the fixing hole.

9. The rapid positioning structure of an automatic backwash filter according to any one of claims 1-8, wherein a hanging ring (2) is arranged in the middle of the top of the filter cylinder (5).