A post-weld heat treatment die for reducing tee pipes

Abstract

The present invention discloses a post-weld heat treatment mold for a reducing tee pipe, which includes a heat treatment unit, the heat treatment unit including an upper shell and a lower shell, and a locking unit; the locking unit includes an upper lock shell and a lower lock shell, the upper lock shell is arranged on the end face of the upper shell, and the lower lock shell is arranged on the end face of the lower shell, the upper lock shell and the lower lock shell are locked with each other to realize the connection between the upper shell and the lower shell. The device is simple and easy to use, greatly improves the efficiency of post-weld heat treatment, and is easy to assemble and disassemble. The automatic locking structure can effectively prevent the occurrence of safety accidents, greatly improving work safety.

Description

Technical Field

[0001] The invention relates to the field of reducing tee pipe welding, in particular to a post-welding heat treatment mould for reducing tee pipes. Background Art

[0002] During the pipeline welding construction process in thermal power plants, especially for high-alloy pipelines, in order to reduce the stress of the welded joints, improve the structure of the welded joints, and enhance the performance of the welded joints, the welded joints need to be subjected to post-weld heat treatment after welding the thick-walled pipes. Forged reducing tees are a common type of pipe fittings and are widely used in pipeline engineering. Due to manufacturing reasons, the branch pipes of the finished forged reducing tees are relatively short. After the branch pipes are welded, the welded joints are heat treated. Due to the short branch pipe length, the heating width of the welded joint close to the reducing tee is small, which can easily result in the heating center not being in the weld and a large temperature difference between the inner and outer walls. In addition, most forged reducing tees are square in shape, which makes it inconvenient to wrap the heater on the construction site. All of these factors will affect the effectiveness of the post-weld heat treatment. Summary of the Invention

[0003] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0004] In view of the problems existing in the prior art, the present invention is proposed.

[0005] Therefore, the technical problem to be solved by the present invention is that the temperature of the post-weld heat treatment is uneven, the heating tool is not perfect, and the heat treatment effect is not ideal.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: a post-weld heat treatment mold for a reducing tee pipe, comprising a heat treatment unit, the heat treatment unit comprising an upper shell and a lower shell, and;

[0007] Locking unit; the locking unit includes an upper lock shell and a lower lock shell, the upper lock shell is arranged on the end surface of the upper shell, the lower lock shell is arranged on the end surface of the lower shell, and the upper lock shell and the lower lock shell are locked with each other to achieve the connection between the upper shell and the lower shell.

[0008] As a preferred solution of the post-weld heat treatment mold for a reducing tee pipe described in the present invention, wherein: a vacuum tube, a locking rod and an elastic rod are arranged in the upper locking shell, the upper locking shell is recessed inward from the connecting end surface to form an upper groove A, the vacuum tube is arranged at the top of the upper groove A, one end of the locking rod extends into the vacuum tube and the other end extends out of the upper groove A, and the elastic rod is arranged in the upper groove A and is located below the vacuum tube.

[0009] As a preferred solution of the post-weld heat treatment mold for a reducing tee pipe described in the present invention, a piston is provided at one end of the locking rod extending into the vacuum tube.

[0010] As an optimal solution of the post-weld heat treatment mold for a reducing tee pipe described in the present invention, a piston cavity is provided in the vacuum tube, a tube hole is provided at one end of the vacuum tube facing the locking rod, the piston is provided in the piston cavity, and the locking rod passes through the tube hole and is fixedly connected to the piston.

[0011] As a preferred solution of the post-weld heat treatment mold for a reducing tee pipe described in the present invention, a first ball is further provided on the locking rod, and a second ball is provided on the elastic rod, and the first ball and the second ball cooperate with each other.

[0012] As a preferred solution of the post-weld heat treatment mold for a reducing tee pipe described in the present invention, the elastic rod is further provided with a horizontal rod and a vertical rod, one end of the horizontal rod is connected to the second ball, and the other end is connected to a first spring, the first spring is fixedly connected to the inner wall of the upper groove A, one end of the vertical rod is connected to the second ball, and the other end extends out of the upper groove A.

[0013] As an optimal solution of the post-weld heat treatment mold for a reducing tee pipe described in the present invention, the lower lock shell is recessed inward from the connecting end surface to form a lower groove B, and the part of the locking rod extending out of the upper groove A extends into the lower groove B.

[0014] As an optimal solution of the post-weld heat treatment mold for a reducing tee pipe described in the present invention, a locking rod is also provided in the lower groove B, and a connecting groove, a protrusion and a second spring are provided on the locking rod. The vertical rod is embedded in the connecting groove, and the second spring is fixedly connected to the inner wall of the lower groove B.

[0015] As a preferred solution of the post-weld heat treatment mold for a reducing tee pipe according to the present invention, a slope ring is further provided on the locking rod, and the slope ring and the protrusion cooperate with each other.

[0016] As a preferred solution of the post-weld heat treatment mold for a reducing tee pipe described in the present invention, a sliding groove is provided at the bottom end of the lower lock shell, and the handle extends out of the lower lock shell through the connecting groove.

[0017] The beneficial effects of the present invention are as follows: the omnidirectional wrapping device performs heat treatment with high efficiency and convenient assembly and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0019] Figure 1 It is a structural diagram of the reducing tee pipe in the first embodiment.

[0020] Figure 2 It is a top view of the post-weld heat treatment mold for the reducing tee pipe in the first embodiment.

[0021] Figure 3 This is a diagram showing the upper shell and lower shell in the second embodiment.

[0022] Figure 4 This is a diagram showing the upper lock shell and the lower lock shell in the second embodiment being connected and not locked.

[0023] Figure 5 This is a diagram of the upper lock shell and the lower lock shell being connected and locked in the second embodiment. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0027] Example 1

[0028] Reference Figures 1 to 5 , is the first embodiment of the present invention, which provides a heat treatment mold for a reducing tee pipe after welding, a heat treatment mold for a reducing tee pipe after welding, characterized in that: it includes a heat treatment unit 100, the heat treatment unit 100 includes an upper shell 101 and a lower shell 102, such as Figure 1The upper shell 101 and the lower shell 102 are connected to each other to form a reducing tee mold. The reducing tee mold here is not only the style shown in the drawings, but can be a mold that conforms to the style of tee pipes of various specifications, as well as; a locking unit 200; the locking unit 200 includes an upper lock shell 201 and a lower lock shell 202. The upper lock shell 201 is arranged on the end surface of the upper shell 101, and the lower lock shell 202 is arranged on the end surface of the lower shell 102. The upper lock shell 201 and the lower lock shell 202 are locked with each other to achieve the connection between the upper shell 101 and the lower shell 102. The upper lock shell 201 and the lower lock shell 202 here form a locking piece, which locks the upper shell 101 and the lower shell 102 together. There are a total of 3 locking pieces formed by the upper lock shell 201 and the lower lock shell 202, which are fixed in a circumferential array on the side of the reducing tee. When using the mold, the upper shell 101 is engaged with the reducing tee to be processed. When the temperature drops, the lock member 201 is automatically locked, and when the temperature drops, the lock member 202 is opened. The upper and lower shells 101 and 102 are respectively locked and locked. When the temperature drops, the lock member 201 is automatically locked, and when the temperature drops, the lock member 202 is opened. The upper and lower shells 101 and 102 are respectively locked and locked. When the temperature drops, the lock member 201 is automatically locked, and when the temperature drops, the lock member 202 is opened. The upper and lower shells 101 and 102 are composed of three layers of materials. The layer close to the reducing tee is a heating layer 1 composed of a special heater. The middle layer is a temperature measuring layer 2, which is used to detect the temperature of the reducing tee in real time, which is convenient for adjusting the temperature of the heater. The outermost layer becomes an insulation layer, which is used to insulate the reducing tee, improve the efficiency of heat treatment, reduce energy consumption, and also protect the heat treatment mold of the reducing tee after welding.

[0029] Example 2

[0030] Reference Figure 4 and 5 , which is the second embodiment of the present invention, and is based on the previous embodiment.

[0031] The upper lock shell 201 is provided with a vacuum tube 201a, a locking rod 201b and an elastic rod 201c. The upper lock shell 201 is recessed inward from the connecting end surface to form an upper groove A. The vacuum tube 201a is arranged at the top of the upper groove A. One end of the locking rod 201b extends into the vacuum tube 201a and the other end extends out of the upper groove A. The elastic rod 201c is arranged in the upper groove A and is located below the vacuum tube 201a. The upper lock shell 201 is equivalent to a driving part. The vacuum tube 201a is filled with liquid. The liquid here can be water or other liquids as long as it can meet the effect of thermal expansion and contraction. Therefore, when the heating layer 1 is heated to a specified temperature, the liquid in the vacuum tube 201a vaporizes and expands, driving the locking rod 201b to move downward, and the locking rod 201b and the lower lock shell 202 cooperate to lock. When the temperature in the vacuum tube 201a drops, the gas liquefies, causing the locking rod 201b to retract and move upward. The heater and the vacuum tube 201a fit together, causing the liquid in the vacuum tube 201a to vaporize rapidly, thereby achieving the purpose of rapid locking. The use of this self-locking device can reduce the number of manual operation steps, improve work efficiency, and at the same time avoid direct contact between staff and effectively prevent scalding accidents.

[0032] Furthermore, a piston 201b-1 is provided at one end of the locking rod 201b extending into the vacuum tube 201a. The piston 201b-1 performs piston motion in the vacuum tube 201a. One end of the piston 201b-1 is connected to the locking rod 201b, and the other end stores liquid. The piston 201b-1 is tightly connected to the vacuum tube, which can prevent liquid leakage on the one hand, and realize the reciprocating motion of the piston 201b-1 through the gasification or liquefaction of the liquid on the other hand.

[0033] Furthermore, a piston chamber 201a-1 is provided in the vacuum tube 201a, a tube hole 201a-2 is provided at one end of the vacuum tube 201a facing the locking rod 201b, the piston 201b-1 is provided in the piston chamber 201a-1, and the locking rod 201b passes through the tube hole 201a-2 and is fixedly connected to the piston 201b-1. This arrangement can effectively prevent the piston 201b-1 from falling out of the piston chamber 201a-1.

[0034] The locking rod 201b is further provided with a first ball 201b-2, and the elastic rod 201c is provided with a second ball 201c-1. The first ball 201b-2 and the second ball 201c-1 cooperate with each other. When the liquid in the vacuum tube 201a is not vaporized, the first ball 201b-2 is above the second ball 201c-1. When the liquid in the vacuum tube 201a slowly vaporizes, the first ball 201b-2 will slowly descend as the locking rod 201b descends. The second ball 201c-1 is located on the descending path of the first ball 201b-2, so the second ball 201c-1 will be slowly squeezed to the side. When the centers of the first ball 201b-2 and the second ball 201c-1 move to the same horizontal line, the distance the second ball 201c-1 is squeezed back reaches a maximum, and then the distance will slowly decrease, and the second ball 201c-1 will be diagonally above the first ball 201b-2 until the second ball 201c-1 rebounds to its initial position.

[0035] Furthermore, a horizontal rod 201c-2 and a vertical rod 201c-3 are provided on the elastic rod 201c. One end of the horizontal rod 201c-2 is fixedly connected to the second ball 201c-1, and the horizontal rod 201c-2 and the second ball 201c-1 are coaxially arranged, and the other end is fixedly connected to the first spring 201c-4. The first spring 201c-4 is fixedly connected to the inner wall of the upper groove A. One end of the vertical rod 201c-3 is connected to the second ball 201c-1, and the other end extends out of the upper groove A. When the upper lock shell 201 and the lower lock shell 202 approach each other, the vertical rod 201c-3 will slowly extend into the lower lock shell 202.

[0036] Example 3

[0037] Reference Figures 3-5 , which is the third embodiment of the present invention. This embodiment is based on the previous embodiment. The lower lock shell 202 is recessed inward from the connecting end surface to form a lower groove B. When the upper lock shell 201 and the lower lock shell 202 approach each other, the part of the locking rod 201b extending outside the upper groove A will extend into the lower groove B.

[0038] Furthermore, a locking rod 202a is provided in the lower groove B, and a connecting groove 202a-1, a protrusion 202a-2 and a second spring 202a-3 are provided on the locking rod 202a. The second spring 202a-3 is fixedly connected to the inner wall of the lower groove B. When the upper lock shell 201 and the lower lock shell 202 are slowly approached and connected, the locking rod 201b will extend into the lower groove B, and at the same time, the vertical rod 201c-3 will also slowly extend into the lower groove B, and the vertical rod 201c-3 will slowly embed into the connecting groove 202a-1. Because the second ball 201c-1 is provided on the vertical rod 201c-3, so.

[0039] Furthermore, the locking rod 201b is provided with a slope ring 201b-3, and the slope ring 201b-3 and the protrusion 202a-2 cooperate with each other. Figure 2 As shown, the slope ring 201b-3 is fixedly set on the locking rod 201b, so the slope ring 201b-3 will move up and down with the locking rod 201b. When the slope ring 201b-3 moves to coincide with the slope surface of the protrusion 202a-2, the locking rod 201b continues to move downward, and the slope ring 201b-3 will squeeze the protrusion 202a-2. Since the other end of the protrusion 202a-2 is provided with a second spring 202a-3, the protrusion 202a-2 will be squeezed and moved toward the second spring 202a-3. When it moves to a certain extent, the slope ring 201b-3 will slide over the protrusion 202a-2, and the protrusion 202a-2 will return to its starting position due to the presence of the spring, and then the slope ring 201b-3 will be engaged with the lower end surface of the protrusion 202a-2, finally achieving a locking effect.

[0040] Finally, a slide groove 202b is provided at the bottom end of the lower lock shell 202, and the handle 202c extends out of the lower lock shell 202 through the connecting groove 202a-1. When it is necessary to open this reducing tee pipe post-weld heat treatment mold, you only need to wait for the equipment to cool down and the gas in the vacuum tube 201a to liquefy, and then slide the handle 202c to the right. Since the handle 202c is connected to the locking rod 202a, the protrusion 202a-2 will also move to the right with the handle 202c. When it moves to the outermost edge of the slope ring 201b-3, the locking rod 201b will rebound upward, and then separate the upper lock shell 201 and the lower lock shell 202, and finally realize the separation of the upper shell 101 and the lower shell 102, and realize the dismantling of this reducing tee pipe post-weld heat treatment mold, which is efficient, convenient and safe.

[0041] It is important to note that the construction and arrangement of the present application shown in a number of different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, directional changes, etc.) without departing substantially from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete elements may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "means plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structures. Other replacements, modifications, changes, and omissions may be made in the design, operating conditions, and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0042] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0043] It will be appreciated that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will, for those of ordinary skill having the benefit of this disclosure, be a routine undertaking of design, fabrication, and production without undue experimentation.

[0044] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A post-weld heat treatment die for a reducing tee pipe, characterized by: include, A heat treatment unit (100), comprising an upper shell (101) and a lower shell (102), and; A locking unit (200); the locking unit (200) comprises an upper locking shell (201) and a lower locking shell (202); the upper locking shell (201) is arranged on the end surface of the upper shell (101), and the lower locking shell (202) is arranged on the end surface of the lower shell (102); the upper locking shell (201) and the lower locking shell (202) are locked with each other to realize the connection between the upper shell (101) and the lower shell (102); The upper locking shell (201) is provided with a vacuum tube (201a), a locking rod (201b) and an elastic rod (201c); the upper locking shell (201) is recessed inward from the connection end surface to form an upper groove (A); the vacuum tube (201a) is provided at the top end of the upper groove (A); one end of the locking rod (201b) extends into the vacuum tube (201a) and the other end extends out of the upper groove (A); the elastic rod (201c) is provided in the upper groove (A) and is located below the vacuum tube (201a); The upper locking shell (201) is equivalent to a driving part, and liquid is contained in the vacuum tube (201a) to meet the requirements of thermal expansion and contraction; One end of the locking rod (201b) extending into the vacuum tube (201a) is provided with a piston (201b-1); A first ball (201b-2) is also provided on the locking rod (201b), and a second ball (201c-1) is provided on the elastic rod (201c), wherein the first ball (201b-2) and the second ball (201c-1) cooperate with each other; The locking rod (201b) is further provided with a slope ring (201b-3), and the slope ring (201b-3) and the protrusion (202a-2) cooperate with each other; The elastic rod (201c) is further provided with a horizontal rod (201c-2) and a vertical rod (201c-3); one end of the horizontal rod (201c-2) is connected to the second ball (201c-1), and the other end is connected to a first spring (201c-4); the first spring (201c-4) is fixedly connected to the inner wall of the upper groove (A); one end of the vertical rod (201c-3) is connected to the second ball (201c-1), and the other end extends out of the upper groove (A); When the upper lock shell (201) and the lower lock shell (202) approach each other, the vertical rod (201c-3) will slowly extend into the lower lock shell (202); The lower lock shell (202) is recessed inward from the connecting end surface to form a lower groove (B), and the portion of the locking rod (201b) extending outside the upper groove (A) extends into the lower groove (B); A locking rod (202a) is also provided in the lower groove (B), and a connecting groove (202a-1), a protrusion (202a-2) and a second spring (202a-3) are provided on the locking rod (202a); the vertical rod (201c-3) is embedded in the connecting groove (202a-1), and the second spring (202a-3) is fixedly connected to the inner wall of the lower groove (B).

2. A post-weld heat treatment mold for a reducing tee pipe according to claim 1, characterized in that: A piston cavity (201a-1) is provided in the vacuum tube (201a); a tube hole (201a-2) is provided at one end of the vacuum tube (201a) facing the locking rod (201b); the piston (201b-1) is provided in the piston cavity (201a-1); and the locking rod (201b) passes through the tube hole (201a-2) and is fixedly connected to the piston (201b-1).

3. A post-weld heat treatment mold for a reducing tee pipe according to claim 2, characterized in that: A sliding groove (202b) and a handle (202c) are provided at the bottom end of the lower lock shell (202); the handle (202c) passes through the connecting groove (202a-1) and extends out of the lower lock shell (202).

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