Pipe fitting flaring and necking composite die

Abstract

The utility model relates to the technical field of composite dies, and discloses a pipe fitting flaring and necking composite die which comprises a necking die pipe and a flaring die pipe which are nested inside and outside, flaring and necking processing can be conveniently carried out on pipe fittings, through the detachable design of the necking die pipe and the flaring die pipe, the requirement for pipe fittings with different calibers can be met, and the production efficiency is improved. The pipe fitting flaring and necking composite die solves the problem that an existing pipe fitting flaring and necking composite die is inconvenient to adapt to pipe fittings with different diameters in the using process, the application range of the flaring and necking composite die is greatly widened, flaring and necking machining can be conveniently conducted on the pipe fittings through the necking die pipe and the flaring die pipe which are nested inside and outside, and the pipe fitting flaring and necking composite die is convenient to use. And through the detachable design of the necking die pipe and the flaring die pipe, pipe fittings with different calibers can be met, the problem that an existing pipe fitting flaring and necking composite die is inconvenient to adapt to the pipe fittings with different diameters during use is solved, and the application range of the flaring and necking die is greatly widened.

Description

Technical Field

[0001] The utility model application relates to the technical field of composite molds, in particular to a composite mold for expanding and shrinking pipe fittings. Background Art

[0002] Pipe flaring refers to the process of expanding the pipe fitting to a certain extent at the pipe interface through external force, enlarging the outer diameter of the pipe opening to a certain range, so that it can be tightly connected with other pipe fittings or equipment. The shrinking of the ends of the pipe fittings is a pipeline processing method. The main purpose is to facilitate connection. During the transportation, installation and use of the pipeline, the pipe fittings need to be connected, and the shrinking at both ends of the pipe fittings can prevent shaking and leakage during the connection of the pipeline.

[0003] Traditionally, specific molds are required for expanding and shrinking pipe fittings. Due to the large variety of pipe sizes, different sizes of pipe fittings require different mold diameters when expanding and shrinking. Most existing molds are not suitable for pipes of different diameters, which greatly reduces the scope of application of the molds. Summary of the Invention

[0004] In order to solve the problem that the existing pipe expansion and contraction composite die is inconvenient to adapt to pipes of different diameters during use, the utility model provides a pipe expansion and contraction composite die to solve the above problem.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A composite mold for pipe expansion and contraction includes a fixed seat and a connecting seat. A connecting seat is fixed to one side of the fixed seat. A contraction mold tube is detachably fixed to the side of the connecting seat away from the fixed seat, and an expansion mold tube is sleeved inside the contraction mold tube. The expansion mold tube is detachably fixed to the connecting seat. Heating wires are equidistantly embedded and fixed inside the contraction mold tube and the expansion mold tube.

[0007] Furthermore, a number of fixed plates are fixed at equal distances on the outside of the shrinking mold tube, a support rod is sleeved inside each of the fixed plates, and a limit clamp is movably sleeved on the support rod, and a limit slot is opened inside each of the fixed plates to cooperate with the limit clamp.

[0008] Furthermore, a positioning block is fixed at the center position of one side of the flaring mold tube facing the connecting seat, a positioning groove is opened inside the connecting seat to cooperate with the positioning block, a limiting rod is slidably inserted inside the connecting seat, and a spring is sleeved on the limiting rod, and the two ends of the spring are respectively fixed to the limiting rod and the inside of the connecting seat, and a pull plate is fixed to the end of the limiting rod extending to the outside of the connecting seat.

[0009] Furthermore, the positioning block and the positioning groove are configured as mutually matching rectangles, and a fixing socket that matches with the limiting plug rod is provided inside the positioning block.

[0010] Furthermore, a limiting sleeve is fixed to the outer surface of the limiting rod close to the positioning slot end, the spring is located outside the limiting sleeve, and arc grooves are provided on the inner sides of both ends of the pull plate.

[0011] Furthermore, each of the support rods is configured to be T-shaped, and the middle portion of each of the limiting clamping plates is configured to be circular, and the diameter of the support rod is smaller than the diameter of the circular portion of the limiting clamping plate.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] In the utility model, the shrinking mold tube and the expanding mold tube are nested inside and outside, which facilitates the expansion and shrinking processing of the pipe fittings. The detachable design of the shrinking mold tube and the expanding mold tube can meet the needs of pipe fittings of different diameters, solving the problem that the existing pipe expansion and shrinking composite mold is inconvenient to adapt to pipe fittings of different diameters when used, and greatly improving the application range of the expansion and shrinking mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of a composite mold according to an embodiment of the present application;

[0016] Figure 2 yes Figure 1 A schematic cross-sectional view of a local structure of a composite mold in the embodiment shown;

[0017] Figure 3 yes Figure 1 In the embodiment shown Figure 1 A schematic diagram of the structure at point A in the figure.

[0018] The meanings of the reference numerals in the figure are: 1. fixing seat; 2. connecting seat; 3. shrinking mold tube; 4. expanding mold tube; 5. heating wire; 6. positioning block; 7. positioning groove; 8. pull plate; 9. limiting plug rod; 10. spring; 11. fixing plate; 12. support rod; 13. limiting clamping plate; 14. limiting clamping groove. DETAILED DESCRIPTION

[0019] In order to make the purpose, features, and advantages of this application more obvious and easy to understand, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the embodiments described below are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0020] Reference Figure 1 、 Figure 2 and Figure 3 A composite mold for pipe expansion and contraction includes a fixed seat 1 and a connecting seat 2. The connecting seat 2 is fixed on one side of the fixed seat 1. A shrinking mold tube 3 is detachably fixed on the side of the connecting seat 2 away from the fixed seat 1, and an expanding mold tube 4 is sleeved inside the shrinking mold tube 3. The expanding mold tube 4 is detachably fixed on the connecting seat 2. Heating wires 5 are equidistantly embedded and fixed inside the shrinking mold tube 3 and the expanding mold tube 4.

[0021] Specifically, when expansion is required, the heating wire 5 is turned on and the pipe mouth is placed on the expansion mold tube 4. When shrinking is required, the pipe to be shrunken is inserted into the shrinking mold tube 3. Under the guidance of the shrinking mold tube 3, the heating wire 5 is used to heat the pipe, so that the pipe can be deformed and shrunken.

[0022] As an optimization solution, Figure 2 and Figure 3 As shown, a number of fixed plates 11 are fixed at equal distances on the outside of the shrinking mold tube 3, and a support rod 12 is sleeved inside each fixed plate 11. Each support rod 12 is set to be "T"-shaped, and the middle part of each limiting clamping plate 13 is set to be circular. The diameter of the support rod 12 is smaller than the diameter of the circle in the middle of the limiting clamping plate 13, and a limiting clamping plate 13 is movably sleeved on the support rod 12. A limiting clamping groove 14 is provided inside each fixed plate 11 to cooperate with the limiting clamping plate 13. A positioning block 6 is fixed at the center position of one side of the expanding mold tube 4 facing the connecting seat 2, and a positioning block 6 is provided inside the connecting seat 2 to cooperate with the limiting clamping plate 13. The positioning block 6 cooperates with the positioning groove 7, and the positioning block 6 and the positioning groove 7 are set to be mutually compatible rectangles. A fixed socket that cooperates with the limiting rod 9 is opened inside the positioning block 6, and a limiting rod 9 is slidably inserted inside the connecting seat 2. The limiting rod 9 is fixed with a limiting sleeve on the outer surface of the end close to the positioning groove 7, and the spring 10 is located on the outside of the limiting sleeve. Arc grooves are opened on the inner sides of both ends of the pull plate 8, and a spring 10 is sleeved on the limiting rod 9. The two ends of the spring 10 are respectively fixed on the limiting rod 9 and the inside of the connecting seat 2, and the limit rod 9 extends to the end outside the connecting seat 2 with a pull plate 8 fixed.

[0023] Specifically, when it is necessary to disassemble the expanding mold tube 4, pull the pull plate 8, drive the limiting rod 9 to compress the spring 10, and move out the positioning block 6, so that the limit of the positioning block 6 can be released, and the expanding mold tube 4 can be pulled out from the inside of the shrinking mold tube 3, and the shrinking mold tube 3 can be replaced. When it is necessary to disassemble the expanding mold tube 4, rotate the limiting clamping plate 13 one by one to align the limiting clamping plate 13 with the limiting slot 14, remove the expanding mold tube 4, and replace the expanding mold tube 4 of different sizes.

[0024] It will be apparent to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present application is defined by the appended claims, not the foregoing description, and all variations within the meaning and scope of the appended claims are intended to be included herein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0025] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A pipe expansion and contraction composite die, characterized by: The invention comprises a fixing seat (1) and a connecting seat (2), wherein the connecting seat (2) is fixed on one side of the fixing seat (1), and a shrinking mold tube (3) is detachably fixed on the side of the connecting seat (2) away from the fixing seat (1), and an expanding mold tube (4) is sleeved inside the shrinking mold tube (3), and the expanding mold tube (4) is detachably fixed on the connecting seat (2), and heating wires (5) are equidistantly embedded and fixed inside the shrinking mold tube (3) and the expanding mold tube (4).

2. The pipe expansion and contraction composite die according to claim 1, characterized in that: A plurality of fixed plates (11) are fixed at equal intervals on the outside of the shrinking mold tube (3), a support rod (12) is sleeved inside each of the fixed plates (11), and a limit clamping plate (13) is movably sleeved on the support rod (12), and a limit clamping groove (14) is provided inside each of the fixed plates (11) to cooperate with the limit clamping plate (13).

3. The pipe expansion and contraction composite die according to claim 1, characterized in that: A positioning block (6) is fixed at the center position of one side of the flaring die tube (4) facing the connecting seat (2); a positioning groove (7) cooperating with the positioning block (6) is provided inside the connecting seat (2); a limiting rod (9) is slidably inserted inside the connecting seat (2), and a spring (10) is sleeved on the limiting rod (9); both ends of the spring (10) are respectively fixed to the limiting rod (9) and the inside of the connecting seat (2); and a pull plate (8) is fixed to one end of the limiting rod (9) extending to the outside of the connecting seat (2).

4. The pipe expansion and contraction composite die according to claim 3, characterized in that: The positioning block (6) and the positioning groove (7) are configured as mutually matching rectangles, and a fixed insertion hole matching the limiting insertion rod (9) is provided inside the positioning block (6).

5. The pipe expansion and contraction composite die according to claim 3, characterized in that: The limiting insert rod (9) is fixed with a limiting sleeve on the outer surface of the end close to the positioning groove (7), the spring (10) is located outside the limiting sleeve, and arc grooves are provided on the inner sides of both ends of the pull plate (8).

6. The pipe expansion and contraction composite die according to claim 2, characterized in that: Each of the support rods (12) is configured to be T-shaped, and the middle portion of each of the limiting clamping plates (13) is configured to be circular, with the diameter of the support rod (12) being smaller than the diameter of the circular portion of the limiting clamping plate (13).

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