Melt filter seal ring puller

Abstract

This utility model belongs to the technical field of pin pullers and discloses a pin puller for a melt filter sealing ring. The melt filter has a combined groove, which consists of a cylindrical groove and two identical semi-cylindrical grooves. The two semi-cylindrical grooves are connected to the cylindrical groove through their respective rectangular inner walls. The bottom of the cylindrical groove has a melt filter outlet, which is circular. A sealing ring is installed in the cylindrical groove. The outer ring of the sealing ring has an annular groove I, the central axis of which coincides with the central axis of the sealing ring. The melt filter sealing ring pin puller includes a pin puller rod and a disassembly device. The disassembly device includes two L-shaped hook pins. The L-shaped hook pins are inserted into the semi-cylindrical grooves and extend into the annular groove I by rotation. One end of the pin puller rod is fixedly connected to the disassembly device. This utility model makes disassembling the sealing ring more convenient.

Description

Technical Field

[0001] This utility model belongs to the field of pin puller technology and relates to a pin puller for sealing rings of melt filters. Background Technology

[0002] In continuous PET production units, as production progresses, impurities (such as calcium carbonate filler, carbon black particles, and gel) gradually accumulate on the filter screen surface, creating filtration resistance. When the pressure difference between the upstream (the side where the melt enters the filter screen) and the downstream (the side where the melt flows out of the filter screen) exceeds a set threshold (such as 2-3 times the initial pressure difference, typically rising from 0.5-1 MPa to 1.5-3 MPa), the melt flow rate decreases and cannot meet the extruder's capacity requirements. At this point, the old filter needs to be disassembled and cleaned, and the filter sealing ring needs to be removed before the melt solidifies.

[0003] Melt filter sealing rings are typically designed with easy-to-remove openings. However, due to the high temperature, manual removal while wearing gloves is not possible. The high viscosity of the melt causes the temperature to drop as the filter is lifted from the workstation, and the melt gradually solidifies, making the sealing ring easily stick to the sealing opening and difficult to remove. Employees often use flathead screwdrivers or other sharp tools to pry the sealing ring, which, while effective, easily damages the sealing surfaces of the filter and the sealing ring, and carries the risk of burns from molten melt splattering onto the user. Therefore, a dedicated pin puller for removing filter sealing rings is needed. Existing pin pullers improve the methods of pulling and installing pins. For example, the invention CN221390854U adds a locking ring to the pin puller rod, providing upward or downward impact force to the pin-pulling end of the rod. This not only pulls out the pin but also allows for the installation of the pin by striking the locking ring with a hammer, eliminating the need for hammering with a copper rod during pin installation. However, the pin puller in this technology is just an external threaded screw, and the pin used for installation and removal is threaded to the pin puller, which cannot fix the filter sealing ring, so the filter sealing ring cannot be removed.

[0004] Therefore, researching a melt filter sealing ring remover that can easily and quickly disassemble the sealing ring of the melt filter is of great significance. Utility Model Content

[0005] The purpose of this invention is to solve the problems existing in the prior art and to provide a melt filter sealing ring puller.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A melt filter sealing ring puller is disclosed. The melt filter has a combined groove, which consists of a cylindrical groove and two identical semi-cylindrical grooves. The two semi-cylindrical grooves are connected to the cylindrical groove through their respective rectangular inner walls. A melt filter outlet is located at the bottom of the cylindrical groove. The melt filter outlet is circular, and its central axis coincides with the central axis of the cylindrical groove. A sealing ring is installed within the cylindrical groove. The outer diameter of the sealing ring is the same as the inner diameter of the cylindrical groove, and the thickness of the sealing ring is the same as the depth of the cylindrical groove. The inner diameter is the same as the diameter of the melt filter outlet; the outer ring of the sealing ring is provided with a circular annular groove I, the cross-section of the circular annular groove I is a U-shaped structure; the planes on which the two side walls of the circular annular groove I are located are parallel to the plane on which the bottom of the cylindrical groove is located, and the central axis of the circular annular groove I coincides with the central axis of the sealing ring; when the sealing ring is placed in the cylindrical groove, the minimum distance between the circular annular groove I and the bottom of the cylindrical groove is denoted as a, and the sum of a and the depth of the semi-cylindrical groove is equal to the depth of the cylindrical groove. The melt filter sealing ring puller includes a puller rod and a disassembly device.

[0008] The disassembly device includes two L-shaped hook pins; the L-shaped hook pins are used to insert into the semi-cylindrical groove and extend into the annular groove I by rotation;

[0009] One end of the pin puller rod is fixedly connected to the disassembly device;

[0010] In use, pull the pin rod to pull the sealing ring out of the combined groove.

[0011] As a preferred technical solution:

[0012] As described above, the disassembly device for a melt filter sealing ring puller also includes a shaft retaining ring and a vertical plate.

[0013] The vertical plate has three through holes, labeled through hole I, through hole II, and through hole III. Through hole III is a threaded hole, and one end of the pin puller rod is inserted into through hole III and threadedly connected to through hole III. Since the pin puller rod and the disassembly device are threadedly connected, different sizes of disassembly devices can be selected to perform disassembly operations when encountering different sealing rings.

[0014] The L-shaped hook pin includes a pin head, a cylindrical section, and an L-shaped rod connected in sequence; the cylindrical section is provided with an annular groove II; the cross-section of the annular groove II is a c-shaped structure; the central axis of the annular groove II coincides with the central axis of the cylindrical section.

[0015] The two L-shaped hook pins are designated as L-shaped hook pin I and L-shaped hook pin II, respectively.

[0016] There are two shaft retaining rings, designated as Shaft Retaining Ring I and Shaft Retaining Ring II, used to prevent the two L-shaped hook pins from slipping out during use;

[0017] Along the direction from the pin puller rod to the vertical plate, the L-shaped hook pin I passes through the through hole I and is clearance-fitted with the through hole I; when the L-shaped hook pin I passes through the through hole I, the annular groove II on the L-shaped hook pin I is exposed outside the vertical plate, and one side wall of the annular groove II is located on the same vertical plane as the side of the vertical plate away from the pin puller rod; the annular groove II on the L-shaped hook pin I is connected to the shaft retaining spring I to rotatably fix the L-shaped hook pin I to the vertical plate;

[0018] Along the direction from the pin puller rod to the vertical plate, the L-shaped hook pin II passes through the through hole II and is clearance-fitted with the through hole II; when the L-shaped hook pin II passes through the through hole II, the annular groove II on the L-shaped hook pin II is exposed outside the vertical plate, and one side wall of the annular groove II is located on the same vertical plane as the side of the vertical plate away from the pin puller rod; the annular groove II on the L-shaped hook pin II is connected to the shaft retaining spring II to rotatably fix the L-shaped hook pin II to the vertical plate;

[0019] The L-shaped rod comprises a quarter cylinder and a hexahedron; the hexahedron is formed by 6 faces, of which 5 are planes and 1 is an arc; the hexahedron is fixed to a rectangular face of the quarter cylinder, and one plane of the hexahedron is coplanar with a sector face of the quarter cylinder; the arc face of the hexahedron is connected to the arc face of the quarter cylinder and lies on the same circumference of the cylinder;

[0020] Let rectangular face I be the rectangular face of the quarter cylinder fixed by the hexahedron, and rectangular face II be the other rectangular face of the quarter cylinder;

[0021] The length of the hexahedron along the length of the quarter cylinder is denoted as b; the length of the hexahedron along the direction perpendicular to rectangular face I is denoted as c; the length of the hexahedron along the direction perpendicular to rectangular face II is denoted as d; and the length of the quarter cylinder is denoted as e.

[0022] The end of the quarter cylinder furthest from the hexahedron is connected to the cylindrical segment, and the central axis of the quarter cylinder coincides with the central axis of the cylindrical segment; d ≤ the radius of the quarter cylinder;

[0023] The radius of the semi-cylindrical groove is equal to 1 / 4 the radius of the cylinder; the depth of the semi-cylindrical groove is equal to e; the width of the annular groove I is ≥ b; the depth of the annular groove I is ≥ c;

[0024] Two L-shaped hook pins are used to insert into two semi-cylindrical grooves respectively, and are inserted into the annular groove I of the sealing ring by rotation;

[0025] When the two L-shaped hook pins are inserted into the annular groove I of the sealing ring, the pull pin rod is pulled out to remove the sealing ring. Specifically, when the width of the annular groove I is equal to b, the L-shaped hook pins are fixedly connected to the sealing ring when inserted into the annular groove I. When the width of the annular groove I is greater than b, during the pulling process, the L-shaped hook pins contact the sidewall of the annular groove I away from the bottom of the cylindrical groove, thus achieving a fixed connection between the L-shaped hook pins and the sealing ring.

[0026] As described above, in a melt filter sealing ring puller, three of the five faces are rectangular faces, denoted as rectangular face A, rectangular face B, and rectangular face C, respectively.

[0027] A hexahedron is fixed to a rectangular face I of a quarter cylinder by a rectangular face A, with side lengths d and b. Rectangular face B is perpendicular to rectangular face I, with side lengths b and c. Rectangular face C is parallel to rectangular face A.

[0028] L-shaped rods can be obtained by cutting a semi-cylinder.

[0029] As described above, a melt filter sealing ring puller has an elongated groove on the surface of the pin head away from the cylindrical section. The length direction of the elongated groove is perpendicular to the rectangular surface II. The elongated groove is used to determine whether the L-shaped hook pin has been rotated and inserted into the annular groove I of the sealing ring, making it convenient to identify the direction of the hook head through the groove during use.

[0030] As described above, a melt filter sealing ring puller has two semi-cylindrical grooves that are rotationally symmetrical about the central axis of the cylindrical grooves.

[0031] Through hole I and through hole II are rotationally symmetrical about the central axis of through hole III, and the distance between the central axes of through hole I and through hole II is equal to the outer diameter of the sealing ring.

[0032] As described above, the disassembly device for a melt filter sealing ring pin puller further includes a cylindrical protrusion; the cylindrical protrusion is fixed on the vertical surface of the vertical plate away from the pin head; the diameter of the cylindrical protrusion is the same as the inner diameter of the sealing ring, and the central axis of the cylindrical protrusion coincides with the central axis of the through hole III; the height of the cylindrical protrusion is ≤1 / 4 of the length of the cylinder, and the cylindrical protrusion is used for convenient positioning.

[0033] As described above, a melt filter sealing ring puller has a through hole IV on a cylindrical protrusion; the central axis of through hole IV coincides with the central axis of through hole III; one end of the puller rod passes through through hole IIII and through hole IV in sequence, and is threaded into through hole III and through hole IV respectively.

[0034] As described above, the sealing ring puller for a melt filter has an octagonal vertical plate, which is more aesthetically pleasing.

[0035] As described above, a melt filter sealing ring puller also includes a hammer and a handle.

[0036] One end of the pin puller rod is fixedly connected to the disassembly device, and the other end is fixedly connected to the handle;

[0037] The hammer is mounted on the pin puller rod and is slidably connected to it. The outer surface of the hammer is knurled for anti-slip purposes. The hammer is located between the disassembly device and the handle. The hammer slides on the pin puller rod to strike the handle. When the hammer and the handle are present, it is not necessary to directly pull the pin puller rod. Instead, the hammer slides on the pin puller rod to strike the handle to disassemble the sealing ring, as described in patent CN221390854U.

[0038] Beneficial effects:

[0039] (1) This utility model greatly improves disassembly efficiency and ensures safety by inserting the L-shaped hook pin of the disassembly device into the semi-cylindrical groove and then rotating it into the annular groove I before pulling the sealing ring out of the combined groove.

[0040] (2) The present invention has a long groove on the pin head, which makes it easy to determine whether the L-shaped hook pin has been rotated and inserted into the annular groove I of the sealing ring during use. At the same time, this design also makes it easier and faster for the operator to rotate the L-shaped hook pin with a flathead screwdriver to hook it into the annular groove I of the sealing ring, while avoiding high temperature burns.

[0041] (3) The present invention has a guiding function through the design of the middle boss of the disassembly device, which can quickly locate the position of the sealing ring. Furthermore, since the pin puller rod and the disassembly device are threadedly connected, different specifications of disassembly devices can be selected to disassemble different models of sealing rings when encountering different sealing rings. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the structure of the sealing ring puller for the melt filter of this utility model;

[0043] Figure 2 This is a schematic diagram of the L-shaped hook pin of the melt filter sealing ring puller of this utility model being inserted into the sealing ring; in the figure, a is a schematic diagram of the melt filter sealing ring puller of this utility model at one angle, and b is a schematic diagram of the melt filter sealing ring puller of this utility model at another angle.

[0044] Figure 3This is a schematic diagram of the L-shaped rod of the L-shaped hook pin of the melt filter sealing ring puller of this utility model when it hooks into the sealing ring; in the figure, a is a schematic diagram of the melt filter sealing ring puller of this utility model at one angle, and b is a schematic diagram of the melt filter sealing ring puller of this utility model at another angle.

[0045] Figure 4 This is a schematic diagram of the structure of the L-shaped hook pin of the melt filter sealing ring puller of this utility model;

[0046] Figure 5 This is a schematic diagram of the melt filter sealing ring puller of this utility model before it is inserted into the combined groove;

[0047] Figure 6 This is a schematic diagram of the melt filter sealing ring puller of this utility model being inserted into the combined groove;

[0048] Figure 7 This is a schematic diagram of the sealing ring removal device for the melt filter of this utility model after disassembling the sealing ring;

[0049] Figure 8 This is a schematic diagram of the sealing ring of this utility model installed on the melt filter;

[0050] Figure 9 This is a schematic diagram showing the sealing ring removed using the melt filter sealing ring remover of this utility model;

[0051] Figure 10 This is a schematic diagram of the sealing ring structure on the melt filter of this utility model;

[0052] Figure 11 This is a schematic diagram of the disassembly device on the sealing ring puller of the melt filter of this utility model;

[0053] Figure 12 A front view of the combined groove of the melt filter;

[0054] Among them, 1-L-type hook pin, 2-disassembly device, 3-hammer, 4-handle, 5-pin puller rod, 6-shaft retaining ring, 7-sealing ring, 8-melt filter. Detailed Implementation

[0055] The present invention will be further described below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0056] A melt filter sealing ring puller, such as Figure 12As shown, the melt filter is provided with a combined groove, which consists of a cylindrical groove and two identical semi-cylindrical grooves. The two semi-cylindrical grooves are connected to the cylindrical groove through their respective rectangular inner walls. The two semi-cylindrical grooves are rotationally symmetrical about the central axis of the cylindrical groove.

[0057] The bottom of the cylindrical groove is provided with a melt filter outlet, which is circular, and the central axis of the melt filter outlet coincides with the central axis of the cylindrical groove. A sealing ring is used to install inside the cylindrical groove. The outer diameter of the sealing ring is the same as the inner diameter of the cylindrical groove, the thickness of the sealing ring is the same as the depth of the cylindrical groove, and the inner diameter of the sealing ring is the same as the diameter of the melt filter outlet.

[0058] like Figure 10 As shown, the outer ring of the sealing ring is provided with an annular groove I, and the cross-section of the annular groove I is a U-shaped structure; the planes on which the two side walls of the annular groove I are located are parallel to the plane on which the bottom of the cylindrical groove is located, and the central axis of the annular groove I coincides with the central axis of the sealing ring; when the sealing ring is placed in the cylindrical groove, the minimum distance between the annular groove I and the bottom of the cylindrical groove is denoted as a, and the sum of a and the depth of the semi-cylindrical groove is equal to the depth of the cylindrical groove;

[0059] like Figure 1 As shown, the melt filter sealing ring puller includes a puller rod 5, a disassembly device 2, a hammer 3, and a handle 4;

[0060] like Figure 1 , Figure 11 As shown, the disassembly device 2 includes two L-shaped hook pins 1, a shaft retaining spring 6, a vertical plate, and a cylindrical protrusion;

[0061] The vertical plate is an octagonal plate with three through holes, labeled through hole I, through hole II, and through hole III; through hole III is a threaded hole.

[0062] Through hole I and through hole II are rotationally symmetrical about the central axis of through hole III, and the distance between the central axes of through hole I and through hole II is equal to the outer diameter of the sealing ring;

[0063] like Figure 4 As shown, the L-shaped hook pin 1 includes a pin head, a cylindrical section, and an L-shaped rod connected in sequence; the cylindrical section is provided with an annular groove II; the cross-section of the annular groove II is a U-shaped structure; the central axis of the annular groove II coincides with the central axis of the cylindrical section.

[0064] The L-shaped bar consists of a quarter cylinder and a hexahedron; the hexahedron is formed by 6 faces, of which 5 are planes and 1 is an arc.

[0065] Three of the five faces are rectangular faces, denoted as rectangular face A, rectangular face B, and rectangular face C; the quarter cylinder includes two rectangular faces, denoted as rectangular face I and rectangular face II.

[0066] A hexahedron is fixed to a rectangular face I of a quarter cylinder via a rectangular face A; rectangular face B is perpendicular to rectangular face I; rectangular face C is parallel to rectangular face A; a plane of the hexahedron is coplanar with a sector face of the quarter cylinder; the arc face of the hexahedron is connected to the arc face of the quarter cylinder and lies on the circumference of the same cylinder.

[0067] The length of the hexahedron along the length of the quarter cylinder is denoted as b; the length of the hexahedron along the direction perpendicular to rectangular face I is denoted as c; the length of the hexahedron along the direction perpendicular to rectangular face II is denoted as d; the length of the quarter cylinder is denoted as e; the side lengths of rectangular face A are d and b respectively; the side lengths of rectangular face B are b and c respectively.

[0068] The end of the quarter cylinder furthest from the hexahedron is connected to the cylindrical segment, and the central axis of the quarter cylinder coincides with the central axis of the cylindrical segment; d ≤ the radius of the quarter cylinder;

[0069] The radius of the semi-cylindrical groove is equal to 1 / 4 the radius of the cylinder; the depth of the semi-cylindrical groove is equal to e; the width of the annular groove I is ≥ b; the depth of the annular groove I is ≥ c;

[0070] A long groove is provided on the surface of the pin head away from the cylindrical section; the length direction of the long groove is perpendicular to the rectangular surface II, and the long groove is used to determine whether the L-shaped hook pin 1 has been rotated and inserted into the annular groove I of the sealing ring;

[0071] The two L-shaped hook pins are designated as L-shaped hook pin I and L-shaped hook pin II, respectively.

[0072] There are two shaft retaining rings 6, which are designated as shaft retaining ring I and shaft retaining ring II respectively;

[0073] Along the direction from the pin puller rod 5 to the vertical plate, the L-shaped hook pin I passes through the through hole I and is clearance-fitted with the through hole I; when the L-shaped hook pin I passes through the through hole I, the annular groove II on the L-shaped hook pin I is exposed outside the vertical plate, and one side wall of the annular groove II is located on the same vertical plane as the side of the vertical plate away from the pin puller rod 5; the annular groove II on the L-shaped hook pin I is connected to the shaft retaining spring I to rotatably fix the L-shaped hook pin I to the vertical plate;

[0074] Along the direction from the pin puller rod 5 to the vertical plate, the L-shaped hook pin II passes through the through hole II and is clearance-fitted with the through hole II; when the L-shaped hook pin II passes through the through hole II, the annular groove II on the L-shaped hook pin II is exposed outside the vertical plate, and one side wall of the annular groove II is located on the same vertical plane as the side of the vertical plate away from the pin puller rod 5; the annular groove II on the L-shaped hook pin II is connected to the shaft retaining spring II to rotatably fix the L-shaped hook pin II to the vertical plate;

[0075] Two L-shaped hook pins 1 are used to be inserted into two semi-cylindrical grooves respectively, and can be inserted into the annular groove I of the sealing ring by rotation;

[0076] The cylindrical protrusion is fixed on the vertical surface of the vertical plate away from the pin head; the diameter of the cylindrical protrusion is the same as the inner diameter of the sealing ring, and the central axis of the cylindrical protrusion coincides with the central axis of the through hole III; the height of the cylindrical protrusion is ≤ 1 / 4 of the length of the cylinder.

[0077] The cylindrical protrusion has a through hole IV; the central axis of through hole IV coincides with the central axis of through hole III;

[0078] One end of the pin puller rod 5 passes through through hole IIII and through hole IV in sequence, and is threaded into through hole III and through hole IV respectively; the other end is fixedly connected to handle 4.

[0079] The hammer 3 is mounted on the pin puller rod 5 and is slidably connected to the pin puller rod 5; the hammer 3 is located between the disassembly device 2 and the handle 4, and the hammer 3 is used to slide on the pin puller rod 5 to strike the handle 4.

[0080] The process of using the above device is as follows: Figures 5-7 As shown, when it is necessary to... Figure 8 When removing the sealing ring 7 of the melt filter 8 shown, first adjust the L-shaped hook pin 1 to the position as shown. Figure 2 As shown, then insert the two L-shaped hook pins 1 of the disassembly device 2 into the semi-cylindrical grooves respectively. Then, hold the handle 4 firmly with one hand, and use a flathead screwdriver to rotate the two L-shaped hook pins 1 90° clockwise, as shown. Figure 3 As shown, hook them into the annular groove I of the sealing ring 7 respectively. After confirming that the sealing ring 7 and the disassembly device 2 are fixed, make the pin puller rod 5 coaxial with the sealing ring 7. At the same time, operate the hammer 3 with one hand to strike the pin puller rod 5 and slide it to strike the handle 4, and gently shake it until the sealing ring 7 is completely pulled out (as shown). Figure 9 (As shown), then use a flathead screwdriver to rotate the two L-shaped hook pins 1 counterclockwise by 90° respectively, and remove the sealing ring 7 from the disassembly device 2 to complete the disassembly. The sealing ring is as shown. Figure 10 As shown.

Claims

1. A melt filter sealing ring puller, wherein the melt filter is provided with a combined groove, the combined groove consisting of a cylindrical groove and two identical semi-cylindrical grooves, the two semi-cylindrical grooves being connected to the cylindrical groove through their respective rectangular inner walls; the bottom of the cylindrical groove is provided with a melt filter outlet, the melt filter outlet being circular, and the central axis of the melt filter outlet coinciding with the central axis of the cylindrical groove; a sealing ring is used to be installed in the cylindrical groove, the outer diameter of the sealing ring being the same as the inner diameter of the cylindrical groove, and the thickness of the sealing ring being the same as that of the cylindrical groove. The sealing ring has the same depth as the cylindrical groove, and its inner diameter is the same as the diameter of the melt filter outlet. The outer ring of the sealing ring has an annular groove I, the cross-section of which is a U-shape. The planes containing the two side walls of the annular groove I are parallel to the plane containing the bottom of the cylindrical groove, and the central axis of the annular groove I coincides with the central axis of the sealing ring. When the sealing ring is placed inside the cylindrical groove, the minimum distance between the annular groove I and the bottom of the cylindrical groove is denoted as 'a', and the sum of 'a' and the depth of the semi-cylindrical groove is equal to the depth of the cylindrical groove. The characteristic of this design is that... The melt filter sealing ring puller includes a puller rod (5) and a disassembly device (2); The disassembly device (2) includes two L-shaped hook pins (1); the L-shaped hook pins (1) are used to be inserted into the semi-cylindrical groove and extended into the annular groove I by rotation; One end of the pin puller rod (5) is fixedly connected to the disassembly device (2).

2. The melt filter sealing ring puller according to claim 1, characterized in that, The disassembly device (2) also includes a shaft retaining ring (6) and a vertical plate; The vertical plate has three through holes, which are respectively called through hole I, through hole II and through hole III; through hole III is a threaded hole, and one end of the pin puller rod (5) is inserted into through hole IIII and threadedly connected to through hole III; The L-shaped hook pin (1) includes a pin head, a cylindrical section and an L-shaped rod connected in sequence; the cylindrical section is provided with an annular groove II; the cross-section of the annular groove II is a U-shaped structure; the central axis of the annular groove II coincides with the central axis of the cylindrical section. Two L-shaped hook pins (1) are respectively designated as L-shaped hook pin I and L-shaped hook pin II; There are two shaft retaining rings (6), which are designated as shaft retaining ring I and shaft retaining ring II respectively; L-shaped hook pin I passes through through hole I and is clearance-fitted with through hole I; when L-shaped hook pin I passes through through hole I, the annular groove II on L-shaped hook pin I is exposed outside the vertical plate, and one side wall of the annular groove II is on the same vertical plane as the side of the vertical plate away from the pin puller rod (5); the annular groove II on L-shaped hook pin I is connected with the shaft retaining spring I to rotatably fix L-shaped hook pin I to the vertical plate; L-shaped hook pin II passes through through hole II and is clearance-fitted with through hole II; when L-shaped hook pin II passes through through hole II, the annular groove II on L-shaped hook pin II is exposed outside the vertical plate, and one side wall of the annular groove II is located on the same vertical plane as the side of the vertical plate away from the pin puller rod (5); the annular groove II on L-shaped hook pin II is connected with the shaft retaining spring II to rotatably fix L-shaped hook pin II to the vertical plate; The L-shaped rod comprises a quarter cylinder and a hexahedron; the hexahedron is formed by 6 faces, of which 5 are planes and 1 is an arc; the hexahedron is fixed to a rectangular face of the quarter cylinder, and one plane of the hexahedron is coplanar with a sector face of the quarter cylinder; the arc face of the hexahedron is connected to the arc face of the quarter cylinder and lies on the same circumference of the cylinder; Let rectangular face I be the rectangular face of the quarter cylinder fixed by the hexahedron, and rectangular face II be the other rectangular face of the quarter cylinder; The length of the hexahedron along the length of the quarter cylinder is denoted as b; the length of the hexahedron along the direction perpendicular to rectangular face I is denoted as c; the length of the hexahedron along the direction perpendicular to rectangular face II is denoted as d; and the length of the quarter cylinder is denoted as e. The end of the quarter cylinder furthest from the hexahedron is connected to the cylindrical segment, and the central axis of the quarter cylinder coincides with the central axis of the cylindrical segment; d ≤ the radius of the quarter cylinder; The radius of the semi-cylindrical groove is equal to 1 / 4 the radius of the cylinder; the depth of the semi-cylindrical groove is equal to e; the width of the annular groove I is ≥ b; the depth of the annular groove I is ≥ c; Two L-shaped hook pins (1) are used to be inserted into two semi-cylindrical grooves respectively, and inserted into the annular groove I of the sealing ring by rotation.

3. A melt filter sealing ring puller according to claim 2, characterized in that, Three of the five faces are rectangular faces, denoted as rectangular face A, rectangular face B, and rectangular face C respectively; A hexahedron is fixed to rectangular face I by rectangular face A, with side lengths d and b. Rectangular face B is perpendicular to rectangular face I, with side lengths b and c. Rectangular face C is parallel to rectangular face A.

4. A melt filter sealing ring puller according to claim 3, characterized in that, A long groove is provided on the surface of the pin head away from the cylindrical section; the length direction of the long groove is perpendicular to the rectangular surface II, and the long groove is used to determine whether the L-shaped hook pin (1) is inserted into the annular groove I of the sealing ring after rotation.

5. A melt filter sealing ring puller according to claim 4, characterized in that, The two semi-cylindrical grooves are rotationally symmetrical about the central axis of the cylindrical groove; Through hole I and through hole II are rotationally symmetrical about the central axis of through hole III, and the distance between the central axes of through hole I and through hole II is equal to the outer diameter of the sealing ring.

6. A melt filter sealing ring puller according to claim 5, characterized in that, The disassembly device (2) also includes a cylindrical protrusion; the cylindrical protrusion is fixed on the vertical surface of the vertical plate away from the pin head; the diameter of the cylindrical protrusion is the same as the inner diameter of the sealing ring, the central axis of the cylindrical protrusion coincides with the central axis of the through hole III; the height of the cylindrical protrusion is ≤ 1 / 4 of the length of the cylinder.

7. A melt filter sealing ring puller according to claim 6, characterized in that, The cylindrical protrusion is provided with a through hole IV; the central axis of the through hole IV coincides with the central axis of the through hole III; one end of the pin puller rod (5) passes through the through hole IIII and the through hole IV in sequence, and is threadedly engaged with the through hole III and the through hole IV respectively.

8. A melt filter sealing ring puller according to claim 7, characterized in that, The vertical panel is an octagonal panel.

9. A melt filter sealing ring puller according to claim 8, characterized in that, The melt filter sealing ring puller also includes a hammer (3) and a handle (4); One end of the pin puller rod (5) is fixedly connected to the disassembly device (2), and the other end is fixedly connected to the handle (4); The hammer (3) is mounted on the pin puller rod (5) and is slidably connected to the pin puller rod (5); the hammer (3) is located between the disassembly device (2) and the handle (4), and the hammer (3) is used to slide on the pin puller rod (5) to strike the handle (4).

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