Metal melt filter element filter layer welding protection tool

Abstract

The utility model discloses a welding protection tool for a filter layer of a metal melt filter element, and relates to the related technical field of filter element production. The filter comprises an outer sleeve, a fixing ring, inner sleeves and an end cover, the fixing ring is fixed to the middle of the inner wall of the outer sleeve, limiting lantern rings are fixed to the two ends of the fixing ring, the inner sleeves are sleeved with the two limiting lantern rings, and a filter body and a welding ring are sleeved with the inner sleeves; the two ends of the outer sleeve are both in threaded connection with end covers, pressing discs are fixed to the ends, away from the outer sleeve, of the end covers, the ends, away from the fixing ring, of the welding rings abut against the pressing discs, and the ends, away from the fixing ring, of the welding rings abut against the pressing discs. Operating openings are formed in the centers of the interiors of the two pressing discs in a penetrating mode. Through the arrangement of the outer sleeve, the fixing ring, the inner sleeve and the end cover, the problems that when a high-precision metal melt filter element is machined, positioning limitation is not accurate enough, and welding protection is not sufficient enough are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field related to filter element production, in particular to a welding protective tool for a filter layer of a metal melt filter element. Background Art

[0002] The filter layer of the metal melt filter element refers to a filter body welded by a metal mesh or metal sintered felt and a metal welding ring, which is mainly a circumferential cylindrical product. Compared with the traditional adhesive filter body, it has the advantages of high strength, good toughness and good sealing. It has been widely used in petrochemical, papermaking, water treatment, polymer and other industries, and is gradually being used in pharmaceutical, food, environmental protection and other industries. However, it still has the following disadvantages in actual use:

[0003] When processing high-precision metal melt filter elements, the filter body welding process is extremely important. It will not only affect the final filter element precision and surface welding quality, but also have a certain impact on the welding strength of the workpiece. If the process is not well positioned, it will lead to product performance degradation and filter layer cracking.

[0004] When processing high-precision metal melt filter elements, welding is directly performed through argon arc welding or gas shielded welding. During the welding process, welding protection is provided by the shielding gas sprayed from the welding machine. However, after welding is completed, the temperature of the weld is still high, which can easily cause oxidation at the welding position. Utility Model Content

[0005] The utility model aims to provide a metal melt filter element filter layer welding protection tooling, which solves the problems of inaccurate positioning restrictions and insufficient welding protection when processing high-precision metal melt filter elements by arranging an outer sleeve, a fixing ring, an inner sleeve and an end cover.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model discloses a welding protective tool for a filter layer of a metal melt filter element, comprising an outer sleeve, a fixing ring, an inner sleeve and an end cover, wherein a fixing ring is fixed to the middle of the inner wall of the outer sleeve, and limiting collars are fixed to both ends of the fixing ring, and inner sleeves are sleeved in the two limiting collars, and a filter body and a welding ring are sleeved in the inner sleeve, and the axial lengths of the filter body and the welding ring are greater than the axial length of the inner sleeve, and the axial length of the filter body is less than the axial length of the inner sleeve, and the welding ring is arranged at one end of the filter body away from the fixing ring, and the inner sleeve is sleeved with a filter body and a welding ring ... inner sleeve is sleeved with a filter body and a welding ring, and the inner sleeve is sleeved with a filter body and a welding ring, and the inner sleeve is sleeved with a filter body and a welding ring, and the inner sleeve is sleeved with a filter body and a welding ring, and the inner sleeve is sleeved with a filter body and a welding ring, and the inner sleeve is sleeved with a filter body and a welding ring, and the inner sleeve is sleeve Both ends of the outer sleeve are threadedly connected with end caps, and a clamping plate is fixed to the end of the end cap away from the outer sleeve. The end of the welding ring away from the fixing ring is in contact with the clamping plate, and operation ports are opened through the center of the two clamping plates. When working, the fixing ring and the inner sleeve are accommodated therein by the outer sleeve, the position of the inner sleeve in the outer sleeve is limited by the fixing ring, the welding ring is limited in it by the inner sleeve, and the inner sleeve is set in the outer sleeve by the end cap, so that the filter body in the inner sleeve can be well positioned when working.

[0008] Furthermore, external threads are provided at the edges of the two end faces of the outer sleeve, and two annular grooves are provided on the outer sleeve. The two annular grooves are respectively arranged at the edges of the two external threads. When the outer sleeve is working, it is threadedly connected to the end cover through the external threads.

[0009] Furthermore, two gas pipes are fixedly connected to the circumference of the outer sleeve, and the two gas pipes are respectively disposed on both sides of the fixed ring. When the outer sleeve is working, it is connected to the equipment for conveying protective gas through the gas pipes.

[0010] Furthermore, the two limiting rings are both fixed on the inner wall of the outer sleeve, the ends of the two limiting rings that are away from each other are wide-mouthed, and the edges of the inner rings are chamfered. When the limiting rings are working, the chamfered ends facilitate the guidance of the inner sleeve.

[0011] Furthermore, the outer diameter of the inner sleeve is smaller than the inner diameter of the outer sleeve, and air holes are provided in a circular array in the middle of the circumference of the inner sleeve, and the inner sleeve delivers the protective gas to the filter body through the air holes.

[0012] Furthermore, an opening is provided in the welding ring along the central axis, the inner diameter of the opening is larger than the inner diameter of the filter body, the inner diameter of the operating port is larger than the inner diameter of the welding ring and smaller than the diameter of the filter body, the end of the filter body away from the end cover is in contact with the filter body, and the filter body is welded through the operating port.

[0013] The utility model has the following beneficial effects:

[0014] The utility model solves the problem of inaccurate positioning restriction when processing high-precision metal melt filter elements by arranging an outer sleeve, a fixing ring, an inner sleeve and an end cover. The end covers at both ends of the outer sleeve are unscrewed, the two ends of the outer sleeve are opened, and the inner sleeve is immediately inserted into the outer sleeve, and the end of the inner sleeve is inserted into the limiting sleeve ring and abutted against the fixing ring. Then the filter body is inserted into the inner sleeve, and then the welding ring is inserted into the inner sleeve, and the end cover is aligned with the external thread on the outer sleeve. After rotating and resetting, the clamping plate is pressed onto the welding ring, and the welding position between the opening on the welding ring and the filter body is exposed through the operating port. The welding ring and the filter body are accurately combined and pressed against each other, so that the positioning restriction is more accurate when processing high-precision metal melt filter elements.

[0015] The utility model solves the problem of insufficient welding protection when processing high-precision metal melt filter elements by arranging an outer sleeve, a fixing ring, an inner sleeve and an end cover. When the filter body and the welding ring are installed and restricted in place in the outer sleeve, the protective gas can be transported to the gas pipe through external gas transmission equipment, and then transported to the outer sleeve through the gas pipe, and enter the filter body and the welding ring through the air holes on the inner sleeve, and discharged through the operating port on the end cover clamping plate, so that when working, the arc generated by welding in the operating port is prevented from causing high-temperature oxidation damage to the materials of the filter body and the welding ring, so that the welding protection is more sufficient when processing high-precision metal melt filter elements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a three-dimensional diagram of the cross-sectional structure of a metal melt filter element filter layer welding protection tooling;

[0018] Figure 2 It is a three-dimensional diagram of the outer sleeve structure;

[0019] Figure 3 It is a three-dimensional diagram of the fixed ring structure;

[0020] Figure 4 It is a three-dimensional diagram of the cutaway structure of the inner sleeve;

[0021] Figure 5 It is a three-dimensional diagram of the end cover structure;

[0022] Figure 6 It is a three-dimensional diagram of the assembly structure of a metal melt filter element filter layer welding protection tooling.

[0023] Reference numerals:

[0024] 1. Outer sleeve; 101. Air pipe; 102. Ring groove [A1]; 103. External thread; 2. Fixing ring; 201. Limiting ring; 3. Inner sleeve; 301. Air vent; 302. Filter body; 303. Welding ring; 304. Opening; 4. End cover; 401. Pressure plate; 402. Operation port. DETAILED DESCRIPTION

[0025] 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 of 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. Specific embodiment 1

[0026] See also Figure 1-6 The utility model is a metal melt filter element filter layer welding protection tooling, comprising an outer sleeve 1, a fixing ring 2, an inner sleeve 3 and an end cover 4. A fixing ring 2 is fixed to the middle of the inner wall of the outer sleeve 1. When the outer sleeve 1 is working, the filter body 302 restricted in the outer sleeve 1 is separated by the fixing ring 2. Both ends of the fixing ring 2 are fixed with limiting rings 201, and the position of the inner sleeve 3 in the outer sleeve 1 is limited by the limiting ring 201. The two limiting rings 201 are sleeved with the inner sleeve 3, and the filter body 302 and the welding ring 303 are sleeved and positioned in the outer sleeve 1 through the inner sleeve 3. The filter body 302 and the welding ring 303 are sleeved in the inner sleeve 3, and the axial lengths of the filter body 302 and the welding ring 303 are greater than the axial length of the inner sleeve 3. 2 has an axial length that is smaller than that of the inner sleeve 3. The welding ring 303 is arranged at one end of the filter body 302 away from the fixing ring 2. The filter body 302 and the welding ring 303 cooperate to perform welding operations. Both ends of the outer sleeve 1 are threadedly connected with end covers 4, and the positions of the filter body 302 and the welding ring 303 in the outer sleeve 1 are restricted by the end covers 4. A clamping plate 401 is fixed to the end of the end cover 4 away from the outer sleeve 1. One end of the welding ring 303 away from the filter body 302 abuts against the clamping plate 401, so that when working, the filter body 302 and the welding ring 303 are clamped and restricted in the outer sleeve 1. An operating port 402 is provided through the center of the two clamping plates 401, and an operating position for welding the filter body 302 and the welding ring 303 is provided through the operating port 402.

[0027] Specifically, external threads 103 are provided at the edges of the two end faces on the circumference of the outer sleeve 1. Two annular grooves 102 are provided on the circumference of the outer sleeve 1. The two annular grooves 102 are respectively arranged at the edges of the two external threads 103. When the outer sleeve 1 is working, the external threads 103 provide a position for threaded connection of the end cover 4.

[0028] Furthermore, two gas pipes 101 are fixedly connected to the circumference of the outer sleeve 1. The two gas pipes 101 are placed on both sides of the fixed ring 2. The ends of the two gas pipes 101 away from the outer sleeve 1 are connected to the welding shielding gas delivery structure, so that the shielding gas can be delivered to the outer sleeve 1 during work.

[0029] Furthermore, the two limiting rings 201 are fixed on the inner wall of the outer sleeve 1, and the ends of the two limiting rings 201 that are away from each other are wide-mouthed, and the edges of the inner circles are chamfered. Through the shape setting of the limiting rings 201, the inner sleeve 3 can be easily guided into it.

[0030] Furthermore, the outer diameter of the inner sleeve 3 is smaller than the inner diameter of the outer sleeve 1 , and air holes 301 are provided in a circular array in the middle of the circumference of the inner sleeve 3 , and the inner sleeve 3 allows the protective gas to pass therein.

[0031] The operation process of this embodiment is as follows: during operation, after the filter body 302 and the welding ring 303 are installed and restricted in place in the outer sleeve 1, the protective gas can be delivered to the gas pipe 101 through external gas delivery equipment, and then delivered to the outer sleeve 1 through the gas pipe 101, and enter the filter body 302 and the welding ring 303 through the air holes 301 on the inner sleeve 3, and discharged through the operating port 402 on the clamping plate 401 of the end cover 4, so that when working, the arc generated by welding in the operating port 402 is prevented, which may cause high-temperature oxidation damage to the materials of the filter body 302 and the welding ring 303. Specific embodiment 2

[0032] See also Figure 1-6On the basis of the specific embodiment 1, an opening 304 is opened along the central axis in the welding ring 303, the inner diameter of the opening 304 is larger than the inner diameter of the filter body 302, the inner diameter of the operation port 402 is larger than the inner diameter of the opening 304 and smaller than the diameter of the welding ring 303, and the end of the welding ring 303 away from the end cover 4 abuts against the filter body 302. When working, first unscrew the end covers 4 at both ends of the outer sleeve 1, open the two ends of the outer sleeve 1, and then insert the inner sleeve 3 into the outer sleeve 1, and insert the end of the inner sleeve 3 into the limiting collar 201, and the fixing ring 2, then insert the filter body 302 into the inner sleeve 3, then insert the welding ring 303 into the inner sleeve 3, align the end cover 4 with the external thread 103 on the outer sleeve 1, rotate and reset, so that the pressing plate 401 is pressed against the welding ring 303, and the welding position between the opening 304 on the welding ring 303 and the filter body 302 is exposed through the operating port 402. After welding, wait for the welding position to cool down, then unscrew the end cover 4, pull out the inner sleeve 3, and pull out the filter body 302 and welding ring 303 after the welding is completed. The work is completed.

[0033] The operation process of this embodiment is as follows: when working, first unscrew the end covers 4 at both ends of the outer sleeve 1, open the two ends of the outer sleeve 1, then insert the inner sleeve 3 into the outer sleeve 1, and insert the end of the inner sleeve 3 into the limiting collar 201, and abut against the fixing ring 2, then insert the filter body 302 into the inner sleeve 3, and then insert the welding ring 303 into the inner sleeve 3, align the end cover 4 with the external thread 103 on the outer sleeve 1, rotate and reset, so that the clamping plate 401 is pressed onto the welding ring 303, and the welding position between the opening 304 on the welding ring 303 and the filter body 302 is exposed through the operating port 402, after welding, wait for the welding position to cool down, then unscrew the end cover 4, pull out the inner sleeve 3, and pull out the filter body 302 and welding ring 303 that have been welded and assembled, and then the work is completed.

[0034] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0035] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A metal melt filter element filter layer welding protection tool, comprising an outer sleeve (1), a fixing ring (2), an inner sleeve (3) and an end cover (4), characterized in that: A fixing ring (2) is fixed to the middle of the inner wall of the outer sleeve (1), and limiting rings (201) are fixed to both ends of the fixing ring (2), and the inner sleeves (3) are sleeved in the two limiting rings (201), and the inner sleeves (3) are sleeved in the inner sleeves (3), and the filter body (302) and the welding ring (303) are sleeved in the inner sleeves (3), and the axial lengths of the filter body (302) and the welding ring (303) are greater than the axial length of the inner sleeve (3), and the axial length of the filter body (302) is less than the axial length of the inner sleeve (3). (3), the welding ring (303) is arranged at one end of the filter body (302) away from the fixing ring (2), both ends of the outer sleeve (1) are threadedly connected with end covers (4), and a clamping plate (401) is fixed to the end of the end cover (4) away from the outer sleeve (1), and one end of the welding ring (303) away from the fixing ring (2) is in contact with the clamping plate (401), and an operation port (402) is provided in the center of the two clamping plates (401).

2. A metal melt filter element filter layer welding protection tooling according to claim 1, characterized in that: External threads (103) are provided at the edges of two end surfaces of the outer sleeve (1). Two annular grooves (102) are provided at the edges of the two external threads (103).

3. The metal melt filter element filter layer welding protection tooling according to claim 1 is characterized by: The outer sleeve (1) is fixedly connected to two air pipes (101) on its circumferential side, and the two air pipes (101) are disposed on both sides of the fixing ring (2).

4. The metal melt filter element filter layer welding protection tooling according to claim 1 is characterized by: The two limiting collars (201) are both fixed on the inner wall of the outer sleeve (1); the ends of the two limiting collars (201) that are away from each other are wide-mouthed, and the edges of the inner rings are chamfered.

5. The metal melt filter element filter layer welding protection tooling according to claim 1, characterized in that: The diameter of the inner sleeve (3) is smaller than the inner diameter of the outer sleeve (1), and a central portion of the circumference of the inner sleeve (3) is provided with air holes (301) in the form of a ring array.

6. The metal melt filter element filter layer welding protection tooling according to claim 1, characterized in that: An opening (304) is provided in the welding ring (303) along the central axis, the inner diameter of the opening (304) is larger than the inner diameter of the filter body (302), the inner diameter of the operation port (402) is larger than the inner diameter of the opening (304) and smaller than the outer diameter of the welding ring (303), and one end of the welding ring (303) away from the end cover (4) abuts against the filter body (302).

Images