Clamping tool for filter element welding

Abstract

The utility model discloses a clamping tool for filter element welding, relates to the field of filter element welding, aims to solve the problem that in the prior art, coaxiality of a part of annular end covers, a connector end cover and a filter screen is inconvenient to guarantee, and adopts the technical scheme that the clamping tool comprises a bottom plate, a butt clamping structure is arranged between the sliding seat and the fixed seat, the butt clamping structure further comprises a conical block and an electric cylinder, and an inner supporting device is connected to the sliding seat; the bottom plate is further connected with an annular positioning device, and the conical block, the annular positioning device and the inner supporting device are coaxially arranged. The inner supporting device and the electric cylinder are arranged on the sliding seat and the fixed seat respectively, the conical block is arranged on the inner supporting device, the filter screen can be supported through the inner supporting device, the conical block abuts against the inner ring face of the connector end cover, and the electric cylinder abuts against the connector end cover or the end socket end cover, so that the end cover and the filter screen are pressed, and welding is facilitated; the annular positioning device is introduced to tightly hold the filter screen and the end cover, so that the end cover and the filter screen are kept coaxial.

Description

Technical Field

[0001] The utility model relates to the technical field of filter core welding, in particular to a clamping tool for filter core welding. Background Art

[0002] During the processing of the filter element, end covers need to be welded on both ends of the filter screen. Depending on the needs, the end covers include joint end covers and head end covers. The joint end covers are mostly ring-shaped structures because they need to be connected to other equipment. When welding the end covers, ensuring the concentricity of the end covers and the filter screen is an important quality indicator.

[0003] Chinese patent CN204308465U discloses a filter element joint welding fixture, which adopts the technical solution of including a fixed sleeve, a clamp seat, a locking bolt, a top block, a core shaft, a clamp, and a filter element assembly. After the filter element assembly is inserted into the core shaft, it is installed in the clamp, and then the clamp is placed in the clamp seat and locked with a locking bolt. The fixed sleeve is assembled with the above-mentioned components and installed on the triangular chuck in the vacuum furnace, and the top block is tightened with a top at the tail.

[0004] Chinese patent CN210549124U discloses a filter element end cover welding positioning tool, which adopts the technical solution of comprising a sleeve with an insertion cavity at one end and a core shaft for passing the corresponding end cover and filter cartridge and coaxially inserting with the insertion cavity at one end, the core shaft is provided with a stop structure at one end away from the sleeve for clamping and fixing the corresponding end cover and filter cartridge together with the end face corresponding to the sleeve, and the part of the core shaft located between the sleeve and the stop structure constitutes a positioning part for keeping the corresponding end cover and filter cartridge coaxial.

[0005] Both existing patents use a core shaft to ensure concentricity. This method is only applicable to annular end covers whose inner ring diameter is not less than the inner diameter of the filter screen. It is not applicable to annular end covers whose inner ring diameter is less than the inner diameter of the filter screen and joint end covers because the core shaft cannot connect with the inner wall of the filter screen or even pass through the end cover after passing through the end cover. Utility Model Content

[0006] The technical problem to be solved by the utility model is to overcome the existing defects and provide a clamping tool for filter element welding, which can effectively solve the problem in the background technology that the inner ring diameter of the annular end cover is smaller than the inner diameter of the filter screen and the joint end cover and the filter screen are not easy to ensure coaxiality.

[0007] The cam is an angular channel structure formed on a pair of sliding plates, which are connected to a pair of sliding plates at two ends, the cam being an arc block formed on a pair of sliding plates with a plurality of sliding plates extending therefrom.

[0008] The electric cylinder is arranged on the fixing seat, the electric cylinder and the inner support device are arranged opposite to each other, the electric cylinder is connected to a control device, the control device has a microprocessor, the microprocessor is electrically connected to the electric cylinder, and the microprocessor controls the extension and retraction of the electric cylinder by setting programs and parameters;

[0009] The bottom plate is also connected with an annular positioning device, and the conical block, the annular positioning device and the inner support device are coaxially arranged, so as to facilitate the coaxial arrangement of the end cover and the filter screen.

[0010] As a preferred technical solution of the utility model, there is an inner cavity in the fixed cylinder, and there is an extrusion plate on the inner rod. The extrusion plate is slidably connected in the inner cavity, and the second spring is pressed between the extrusion plate and the inner cavity; a handle is provided at the end of the inner rod, and the handle is convenient for holding to operate the inner rod to slide.

[0011] As a preferred technical solution of the utility model, an end plate is also provided at the end of the inner rod, the second connecting rod and the end plate are hinged, the outer diameter of the end plate is the same as the outer diameter of the fixed tube, so that the connection between the second connecting rod and the end plate is flush with the connection between the second connecting rod and the fixed tube.

[0012] As an optimal technical solution of the utility model, the annular positioning device also includes a shell and a first clamping block, the shell is an annular structure, and a first annular groove is provided inside, the first annular groove is connected with the outside of the outer ring surface through a waist-shaped hole, and is connected with the inside of the inner ring surface through a square hole; an extrusion ring is slidably connected in the first annular groove, the outer ring surface of the extrusion ring is connected with a lever, and the inner ring surface is provided with an arc-shaped table surface, the lever is slidably connected in the waist-shaped hole, and a tension spring is provided between the lever and the first annular groove, and the clamping state of the first clamping block can be maintained under the action of the tension spring; a sliding rod is connected to the first clamping block, the first clamping block is located at the inner ring of the shell, the sliding rod passes through the square hole and enters the first annular groove, and a spherical end is provided at the end of the sliding rod located in the first annular groove, and a first spring is pressed between the spherical end and the inner ring surface of the first annular groove, the spherical end and the arc surface of the arc table surface are slidably connected, and under the action of the first spring, the spherical end can always be close to the arc table surface.

[0013] As a preferred technical solution of the utility model, it also includes a first connecting rod, one end of which is hinged to the first clamping block, and the other end is hinged to the L-shaped rod cross section of the second clamping block. There are two first connecting rods, and the two first connecting rods, the cross section, and the first clamping block form a parallelogram structure, which can maintain the cross section and the first clamping block in parallel. A fixing bolt is installed at the hinge, and the current state of the parallelogram can be maintained after the fixing bolt is tightened; the second clamping block is also connected to a guide block, which guides the end plate when it is placed in order to make it coaxial with the filter screen more quickly.

[0014] As a preferred technical solution of the utility model, a positioning ring is provided in the first annular groove, and the positioning ring is coaxial with the first annular groove; a second annular groove is provided on the end face of the extrusion ring, and the positioning ring is slidably connected in the second annular groove.

[0015] As an optimal technical solution of the utility model, the base plate is provided with a slide rail, the sliding seat is slidably connected to the slide rail, the upper shaft of the slide rail is connected with a screw rod, the sliding seat has a threaded hole, the screw rod is engaged in the threaded hole; the end of the screw rod has a screw head.

[0016] Compared with the prior art, the utility model has the following beneficial effects: the utility model provides an inner support device and an electric cylinder on the sliding seat and the fixed seat respectively, and provides a conical block on the inner support device, so that the filter can be supported by the inner support device, the inner ring surface of the joint end cover can be pressed tightly by the conical block, and the joint end cover or the head end cover can be pressed tightly by the electric cylinder to compress the end cover and the filter, thereby facilitating welding; the introduction of the annular positioning device can hold the filter and the end cover tightly, thereby maintaining the coaxiality of the end cover and the filter. Since the coaxiality is adjusted from the outside, the technical solution has good compatibility with different end covers, and is convenient for ensuring the coaxiality of the annular end cover with an inner ring diameter smaller than the inner diameter of the filter and the joint end cover and the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the slide rail and screw of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the annular positioning device of the utility model;

[0020] Figure 4 This is an enlarged structural diagram of part A of the utility model;

[0021] Figure 5 This is a schematic diagram of the housing structure of the utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the extrusion ring of the utility model;

[0023] Figure 7 This is a schematic diagram of the structure of the internal support device of the utility model;

[0024] Figure 8 This is a schematic diagram of the support structure of the internal support device of the utility model;

[0025] Fig. 9 It is a schematic diagram of the internal structure of the fixed cylinder of the utility model.

[0026] In the figure: 1, bottom plate; 2, conical block; 3, annular positioning device; 301, housing; 3011, waist-shaped hole; 3012, square hole; 3013, positioning ring; 302, first annular groove; 303, extrusion ring; 3031, arc table; 3032, lever; 3033, second annular groove; 304, tension spring; 305, first clamping block; 306, second clamping block; 3061, L-shaped rod; 307, guide block; 308, first connecting rod; 309, sliding rod; 310, The first spring; 4. electric cylinder; 5. filter element; 501. filter screen; 502. first end cover; 503. second end cover; 6. sliding seat; 7. slide rail; 8. screw rod; 801. screw head; 9. fixed seat; 10. fixed plate; 11. internal support device; 1101. fixed cylinder; 1102. handle; 1103. internal rod; 11031. end plate; 11032. extrusion plate; 1104. internal support plate; 1105. second connecting rod; 1106. inner cavity; 1107. second spring. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example 1

[0028] like Figures 1 to 9 As shown, the utility model discloses a clamping tool for filter element welding, and the technical solution adopted is, comprising a base plate 1, a fixing seat 9 is provided on the base plate 1, an electric cylinder 4 is fixedly connected to the fixing seat 9, a control device is also provided, a microprocessor is provided in the control device, and the microprocessor is electrically connected to the electric cylinder 4. In order to adapt to the interface end cover and the head end cover, a first threaded hole is opened on the telescopic end face of the electric cylinder 4, and a push plate is threadedly connected, and the push plate is connected to the second end cover 503 of the filter element 5 to press the second end cover 503 onto the filter screen 501.

[0029] In order to be compatible with filter elements 5 of different lengths, a slide rail 7 is provided on the bottom plate 1 and a slide seat 6 is slidably connected to the slide rail 7. In order to facilitate stable adjustment and positioning, Figure 2 As shown, a screw rod 8 is connected to the shaft on the slide rail 7, a second threaded hole is provided on the sliding seat 6, and the screw rod 8 is engaged in the second threaded hole. In order to facilitate the screwing of the screw rod 8, a screw head 801 is provided at the end of the screw rod 8. In order to facilitate the use of an hexagonal wrench and an ordinary wrench, the screw head 801 adopts a hexagonal prism structure and a hexagonal countersunk hole is provided on the end face.

[0030] In order to facilitate fixing the first end cover 502 of the end cover style and to facilitate making the first end cover 502 coaxial with the filter screen 501, an inner support device 11 is fixedly connected to the sliding seat 6, such as Figures 7 to 9 As shown, the inner support device 11 includes a fixed cylinder 1101, an inner rod 1103 and an inner support plate 1104. The fixed cylinder 1101 is fixed on the sliding seat 6, and is a tubular structure with two open ends. The inner rod 1103 is slidably connected in the fixed cylinder 1101. In order to facilitate the use of annular end covers with an inner ring diameter smaller than the inner diameter of the filter screen 501, two second connecting rods 1105 are axially connected on the inner support plate 1104. The two second connecting rods 1105 are arranged in an "eight" shape. The end of the second connecting rod 1105 close to the fixed cylinder 1101 is hinged to the fixed cylinder 1101. In order to maintain the parallelism of the hinge, an end plate 11031 is provided at the end of the inner rod 1103 located in the filter screen 501, and the end of the second connecting rod 1105 away from the fixed cylinder 1101 is hinged to the end plate 11031. The surfaces opposite to the inner support plate 1104 and the filter screen 501 are arc surfaces. In order to control the folding and opening of the inner support plate 1104, an inner cavity 1106 is provided in the fixed cylinder 1101, and the inner cavity 1106 is connected to the inner tube of the fixed cylinder 1101. The inner rod 1103 is connected to the extrusion plate 11032 in the inner cavity 1106, and a second spring 1107 is pressed between the extrusion plate 11032 and the inner cavity 1106. In order to be compatible with different end covers, a conical block 2 is provided on the fixed cylinder 1101, and the small head of the conical block 2 is close to the end plate 11031. After the small head enters the inner ring of the first end cover 502, it can press the first end cover 502, and together with the push plate connected to the electric cylinder 4, it forms a clamping structure, which can clamp the filter screen 501, the first end cover 502 and the second end cover 503 of the filter element 5, so as to facilitate welding. The coaxial arrangement of the conical block 2 and the inner support device 11 can ensure the coaxiality between the filter screen 501 and the first end cover 502.

[0031] In order to ensure the coaxiality between the second end cover 503 and the filter screen 501, an annular positioning device 3 is installed on the bottom plate 1 using an L-shaped fixing plate 10, such as Figures 3 to 6As shown, the annular positioning device 3 includes a shell 301, and the shell 301 is an annular structure with a first annular groove 302 inside. The extrusion ring 303 is slidably connected in the first annular groove 302. In order to maintain the rotation axis of the extrusion ring 303, a positioning ring 3013 is arranged in the first annular groove 302, and a second annular groove 3033 is provided on the end face of the extrusion ring 303. The positioning ring 3013 is slidably connected in the second annular groove 3033; in order to be able to embrace the filter element 5 from the outside to maintain coaxiality, a first clamping block 305 is arranged in the inner ring of the shell 301, and there are three first clamping blocks 305, which are arranged in an annular array. In order to drive the first clamping block 305 to embrace and open, a square sliding rod 309 is connected to the first clamping block 305, and a square hole 3012 is provided on the inner ring surface of the first annular groove 302. The sliding rod 309 passes through the square hole 3012 and is slidably connected in the square hole 3012. The end of the slide bar 309 located in the first annular groove 302 is connected with a spherical end, the diameter of the spherical end is larger than the diagonal length of the slide bar 309, and the slide bar 309 is sleeved with a first spring 310, which is pressed between the spherical end and the inner ring surface of the first annular groove 302. An arc table 3031 is set on the inner ring surface of the extrusion ring 303, and there are three arc tables 3031, which correspond to the three first clamping blocks 305 one by one. There is an arc surface, and the spherical end of the slide rod 309 is slidably connected on the arc surface. In order to facilitate external operation, a waist-shaped hole 3011 is opened on the outer ring surface of the first annular groove 302, and a lever 3032 is set on the outer ring surface of the extrusion ring 303. The lever 3032 passes through the waist-shaped hole 3011 and is slidably connected in the waist-shaped hole 3011. In order to achieve automatic tightening after letting go, a tension spring 304 is set between the lever 3032 and the outer ring surface of the first annular groove 302.

[0032] Considering the different outer diameters of the second end cap 503 and the filter screen 501, a second clamp block 306 is introduced. The second clamp block 306 is arranged in parallel with the first clamp block 305. In order to achieve compatibility with the outer diameter difference between the second end cap 503 and the filter screen 501, an L-shaped rod 3061 is connected to the second clamp block 306. The transverse section of the L-shaped rod 3061 is parallel to the second clamp block 306 and the first clamp block 305. A first connecting rod 308 is hinged between the first clamp block 305 and the L-shaped rod 3061. The first connecting rod 308 has two parallel connecting rods. The first clamp block 305, the L-shaped rod 3061 cross section, and the first connecting rod 308 are arranged so as to form a parallelogram structure. In order to stabilize the parallelogram, the first clamp block 305 and the L-shaped rod 3061 cross section are provided with a hinge seat, and through holes are provided at both ends of the first connecting rod 308. The hinge uses a bolt as a rotating shaft, and the rotating shaft passes through the hinge seat and the through hole and is connected with a nut. The hinge seat can be locked by locking the nut to prevent the first connecting rod 308 from rotating. The lock can be released by loosening the nut, and the first connecting rod 308 can resume the rotatable state.

[0033] In order to facilitate the second end cover 503 to enter between the second clamping blocks 306, a guide block 307 is connected to the end face of the second clamping block 306, the three first clamping blocks 305 correspond to the three second clamping blocks 306, and the three second clamping blocks 306 correspond to the three guide blocks 307, so the three guide blocks 307 are distributed in a circular array, and for the convenience of guidance, the three guide blocks 307 are bent outward.

[0034] The working principle of this utility model:

[0035] Use the standard filter element adjustment fixture, one staff member manually turns the lever 3032 to drive the extrusion ring 303 to rotate, the first spring 310 pushes the spherical end to open the first clamp 305, passes the standard filter element through the annular positioning device 3, and aligns the first clamp 305 with the filter screen 501, and the second clamp 306 with the second end cover 503, another staff member uses an Allen wrench to insert the countersunk hole at the end of the screw head 801, screws the screw 8 to make the sliding seat 6 slide along the slide rail 7, and pushes the handle 1102 to make the inner rod 1103 slide in the fixed cylinder 1101, and at the same time, the extrusion plate 11032 compresses the second spring 1107, the end plate 11031 moves away from the fixed cylinder 1101, the angle between the two second connecting rods 1105 increases, and the inner The support plate 1104 moves closer to the inner rod 1103, and the screw rod 8 is continuously screwed to insert the inner support plate 1104 from the first end cover 502 of the filter element 5 into the filter element 5 until the conical block 2 presses against the inner ring of the first end cover 502, and the handle 1102 is released. The inner rod 1103 is reset under the action of the second spring 1107, and the inner support plate 1104 opens to press against the inner wall of the filter screen 501; a push plate of a suitable size is selected according to the style of the second end cover 503 of the filter element 5. For the end cover of the head, a push plate of a small size can be selected. For the end cover of the joint, a push plate with a diameter larger than the inner diameter of the second end cover 503 needs to be selected. The operation panel of the control device is manually controlled to extend the electric cylinder 4 until the push plate and the conical block 2 clamp the filter element 5, and the control device records the current extension of the electric cylinder 4.

[0036] Loosen the lever 3032 to allow the first clamping block 305 to clamp the filter screen 501, loosen the fastening bolts between the first connecting rod 308 and the first clamping block 305 and the L-shaped rod 3061, adjust the second clamping block 306 to move toward the second end cover 503, and hold the second end cover 503 tightly, and tighten the fastening bolts to lock the rotation of the first connecting rod 308.

[0037] Operate the operation panel to reset the electric cylinder 4, push the lever 3032 to open the first clamping block 305, push the handle 1102 to close the inner support plate 1104, and remove the standard filter element.

[0038] Push the handle 1102 to retract the inner support plate 1104, put the first end cover 502 of the filter element to be welded on the conical block 2, move the lever 3032 to open the first clamping block 305, pass the filter screen 501 through the annular positioning device 3, put it on the inner support device 11, and make the end face of the filter screen 501 connect with the end face of the first end cover 502, release the lever 3032 and the handle 1102, the inner support plate 1104 supports the inner wall of the filter screen 501, the first clamping block 305 clamps the outer wall of the filter screen 501, and the second end cover 503 is installed between the second clamping blocks 306 along the guide block 307 and connects with the end face of the filter screen 501, and the operation panel is used to extend the electric cylinder 4 by the previously recorded extension amount to clamp the filter element 5.

[0039] To carry out welding, first weld the parts between the three groups of first clamping blocks 305. After welding is completed, operate the operation panel to reset the electric cylinder 4, move the lever 3032 to open the first clamping block 305, push the handle 1102 to retract the inner support plate 1104, and remove the filter element 5.

[0040] The filter element 5 is rotated again to expose the previously clamped portion, and welding is continued after re-clamping.

[0041] After welding is completed, remove the filter element 5 and complete the welding.

[0042] The circuits and mechanical connections involved in the utility model are conventional means used by those skilled in the art, and technical inspiration can be obtained through limited tests, which are common knowledge. The microprocessor designed in the utility model adopts 89C51 single-chip microcomputer, and is connected with a storage module for recording data and controlling the start and stop of the motor. The installation and pin connection of 89C51 can be operated by those skilled in the art with reference to the textbooks and product manuals, which are prior art.

[0043] Components not described in detail herein are prior art.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A clamping fixture for filter element welding, comprising a base plate (1), a sliding seat (6) and a fixed seat (9) being provided on the base plate (1), a clamping structure being provided between the sliding seat (6) and the fixed seat (9), and characterized in that: The clamping structure further comprises a conical block (2) and an electric cylinder (4); an inner support device (11) is connected to the sliding seat (6); the inner support device (11) further comprises a fixed cylinder (1101), an inner rod (1103) and an inner support plate (1104); the fixed cylinder (1101) is a cylindrical structure with two ends open and connected to the sliding seat (6); the inner rod (1103) is slidably connected in the fixed cylinder (1101); the conical block (2) is sleeved on the fixed cylinder (1101); the inner support plate (1104) is hinged with two sets of second connecting rods (1105) which are respectively hinged to the fixed cylinder (1101) and the inner rod (1103); a second spring (1107) is press-fitted between the inner rod (1103) and the fixed cylinder (1101); The electric cylinder (4) is arranged on the fixing seat (9), the electric cylinder (4) and the inner support device (11) are arranged relative to each other, and the electric cylinder (4) is connected to a control device; The bottom plate (1) is also connected to an annular positioning device (3), and the conical block (2), the annular positioning device (3), and the inner support device (11) are coaxially arranged.

2. The filter element welding clamping tool according to claim 1, characterized in that: The fixed cylinder (1101) has an inner cavity (1106), the inner rod (1103) has an extrusion plate (11032), the extrusion plate (11032) is slidably connected in the inner cavity (1106), and the second spring (1107) is press-fitted between the extrusion plate (11032) and the inner cavity (1106); a handle (1102) is provided at the end of the inner rod (1103).

3. A clamping tool for filter element welding according to claim 1 or 2, characterized in that: An end plate (11031) is also provided at the end of the inner rod (1103), and the second connecting rod (1105) and the end plate (11031) are hingedly connected.

4. The filter element welding clamping tool according to claim 1, characterized in that: The annular positioning device (3) further comprises a shell (301) and a first clamping block (305); the shell (301) is an annular structure and has a first annular groove (302) inside; the first annular groove (302) is connected to the outside of the outer annular surface through a waist-shaped hole (3011) and is connected to the inside of the inner annular surface through a square hole (3012); an extrusion ring (303) is slidably connected inside the first annular groove (302); the outer annular surface of the extrusion ring (303) is connected to a lever (3032) and the inner annular surface is provided with an arc-shaped table (3031); the lever (3032) is slidably connected inside the waist-shaped hole (3011); A tension spring (304) is provided between the lever (3032) and the first annular groove (302); a sliding rod (309) is connected to the first clamping block (305); the first clamping block (305) is located in the inner ring of the housing (301); the sliding rod (309) passes through the square hole (3012) and enters the first annular groove (302); a spherical end is provided at the end of the sliding rod (309) located in the first annular groove (302); a first spring (310) is pressed between the spherical end and the inner ring surface of the first annular groove (302); the spherical end is slidably connected to the arc surface of the arc table (3031).

5. The filter element welding clamping tool according to claim 4, characterized in that: It also includes a first connecting rod (308), one end of which is hinged to the first clamping block (305), and the other end of which is hinged to the L-shaped rod (3061) transverse section of the second clamping block (306). There are two first connecting rods (308), and the two first connecting rods (308), the transverse section, and the first clamping block (305) form a parallelogram structure, and a fixing bolt is installed at the hinge; the second clamping block (306) is also connected to a guide block (307).

6. A clamping tool for filter element welding according to claim 4 or 5, characterized in that: A positioning ring (3013) is provided in the first annular groove (302), and the positioning ring (3013) is coaxial with the first annular groove (302); a second annular groove (3033) is provided on the end surface of the extrusion ring (303), and the positioning ring (3013) is slidably connected in the second annular groove (3033).

7. The clamping tool for filter element welding according to claim 1, characterized in that: The bottom plate (1) has a slide rail (7), the slide seat (6) is slidably connected to the slide rail (7), the upper shaft of the slide rail (7) is connected to a screw rod (8), the slide seat (6) has a threaded hole, the screw rod (8) is engaged in the threaded hole; and the end of the screw rod (8) has a screw head (801).

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