CN207642575U - Conduit all-position automatic welding technology inner support elastic pin shaft - Google Patents

Abstract

The utility model discloses an elastic pin shaft for inner support automatically welded at all positions of a catheter, which comprises a disc-shaped base, and a circular gland is arranged at the center of one side of the base, and the gland is connected with the first screw and the base. The base is fastened, and the other side of the base is connected with a ring-shaped elastic jacket, which also includes a taper sleeve, an anti-rotation screw and a horizontal screw rod. The outer surface of the tapered sleeve is in contact with the inner surface of the elastic jacket. The elastic collet is threadedly connected with the base, and the anti-rotation screw is connected with the tapered sleeve. The support diameter can be adjusted within a certain range, so it can adapt to the inner diameter tolerance and roundness fluctuation of the pipe material, and meet the control requirements of the all-position automatic welding process for the amount of product staggered seam. The product is easy to clamp, and the function is stable and reliable. It can meet the needs of mass production of products.

Description

Catheter all-position automatic welding inner support elastic pin

technical field

The utility model relates to a pin shaft, in particular to an elastic pin shaft for all-position automatic welding of inner supports of a catheter.

Background technique

All-position automatic welding is a new type of automatic welding method in which the welding torch automatically moves along the weld track and completes welding at the same time. Due to the stable and reliable quality of weld formation, it has been gradually used in aerospace, nuclear industry and chemical industry and other important pipe parts in recent years. welding production.

In the butt welding production process of pipe parts, it is usually necessary to use inner support or outer hoop device for positioning. A certain pipe product requires all-position automatic welding. Due to the relatively thin pipe wall, there are unavoidable differences in the inner diameter tolerance and roundness of the pipe material at both ends of the butt joint. If the non-adjustable pin shaft in the conventional butt welding production process is used for positioning, the It is unable to meet the control requirements of the all-position automatic welding process for the amount of staggered joints on the product butt joints, so the factory has developed a new type of elastic pin.

Contents of the invention

The purpose of this utility model is to provide an elastic pin shaft for all-position automatic welding of catheters to solve the problems of lack of available inner support fixtures and difficulty in controlling the amount of staggered joints in the above-mentioned catheter all-position automatic welding production process.

In order to achieve the above purpose, the technical solution adopted by the utility model is as follows: the conduit is automatically welded at all positions to support elastic pins, including a disc-shaped base, and the center of one side of the base is provided with a circular gland. The gland is fastened to the base by setting the first screw, and the other side of the base is connected with a ring-shaped elastic jacket, which also includes a taper sleeve, an anti-rotation screw and a horizontal screw rod. The outer surface of the taper sleeve In contact with the inner surface of the elastic jacket, the elastic jacket is threaded to the base, the anti-rotation screw is connected to the tapered sleeve, and is matched with the base, and the tapered sleeve is also threaded to the screw rod, The head end of the screw is provided with a shaft shoulder, and the end is provided with a trapezoidal thread. The center of the taper sleeve is provided with a screw hole matching the trapezoidal thread of the screw. The screw passes through the center of the base, gland and elastic jacket, and passes through the trapezoidal thread. The thread is fastened with the taper sleeve.

Further, the elastic jacket is made of 9SiCr material.

Further, the elastic jacket is provided with 16 slots uniformly distributed along the circumferential direction.

Further, the outer surface of the tapered sleeve is a tapered surface.

Compared with the prior art, the utility model has the advantage that the diameter of the support can be adjusted within a certain range, so it can adapt to the inner diameter tolerance of the pipe material and the fluctuation of its roundness, and can meet the requirements of the all-position automatic welding process for the product staggered joints. Quantity control requirements, convenient product clamping, stable and reliable functions, can meet the needs of mass production of products.

Description of drawings

Fig. 1 is a sectional view of the utility model;

Fig. 2 is the first front view of the utility model;

Fig. 3 is the second front view of the utility model;

Fig. 4 is the front view of the taper sleeve of the utility model;

Fig. 5 is the A-A sectional view of taper sleeve;

Fig. 6 is the front view of the utility model elastic jacket

Fig. 7 is a partial sectional view of the screw of the present invention.

In the figure: 1-base, 2-anti-rotation screw, 3-first screw, 4-screw, 5-gland, 6-taper sleeve, 7-elastic collet.

Detailed ways

The utility model will be further described below in conjunction with accompanying drawing.

Embodiment 1: As shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, and Fig. 7, the catheter of the present invention is automatically welded in all positions to support elastic pins, mainly composed of base 1, elastic clips Cover 7, screw rod 4, gland 5, taper sleeve 6 and anti-rotation screw 2 and other parts. The elastic collet 7 is threadedly connected to the base 1, and the center of the base 1 is provided with a screw 4 which can rotate around its central axis. Axial limit, the other end of the screw rod 4 is connected with the taper sleeve 6 through the trapezoidal thread, the outer cone surface of the taper sleeve 6 is in contact with the inner cone surface of the elastic jacket 7 when working, and the anti-rotation screw 2 is also connected on the base to prevent the cone The sleeve 6 rotates under the drive of the screw rod 4 and only moves axially.

As the core part of the elastic pin shaft, the elastic jacket 7 is made of 9SiCr due to its large diameter. In order to meet the requirements of use, in addition to the inner surface of the working part of the front end of the elastic jacket 7, the outer surface is also designed as two sections of small-angle conical surfaces with opposite directions. The diameter of the intersection point is larger, and the diameter of both ends gradually decreases. The elastic jacket 7 is provided with 16 cutting grooves evenly distributed along the circumferential direction, and at the same time, a weakened annular groove is also arranged on the inner surface of the root of the working section. In order to ensure the resilience performance of the elastic jacket 7, after quenching and tempering the main body, the working parts are partially quenched, and the working parts are required to reach a high hardness value of HRC56-62 after heat treatment.

The outer surface of the tapered sleeve 6 is a conical surface, and in order to ensure the performance, the conical angle of the conical surface is slightly larger than that of the inner conical surface of the elastic jacket 7 . The taper sleeve 6 center is provided with a trapezoidal threaded through hole, and the side is provided with anti-rotation screws 2 connecting screw holes and lightening holes.

The smooth rod end of the screw 4 is provided with a shaft shoulder, and the other end is a trapezoidal thread. In order to facilitate disassembly and adjustment operations, in addition to the inner hexagonal hole grooves at both ends of the screw 4, a flat position is also set at the polished rod operating end, which is used for ordinary wrenches. operate.

When working, first put the elastic pin shaft into the conduit, and after the center of the working section of the elastic jacket 7 is aligned with the welding seam, use an Allen wrench or a common wrench to twist the smooth rod end of the screw 4, so that the tapered sleeve 6 is on the screw 4. Driven by it, it moves to the left along the axial direction, and finally uses the elastic deformation of the working part of the front end of the elastic jacket 7 to tighten the products at both ends of the welding seam, and then the welding operation can be performed. After the welding is completed, screw the screw rod 4 in reverse, the taper sleeve 6 moves to the right, and the working part of the elastic jacket 7 rebounds and shrinks until the product is loose. During the movement of the taper sleeve 6, since the anti-rotation screw 2 which prevents the taper sleeve 6 from rotating is installed on the base 1, it can only move axially.

Claims (4)

1. All-position automatic welding of the inner supporting elastic pin of the catheter, which is characterized in that it includes a disc-shaped base (1), and a circular gland (5) is arranged at the center of one side of the base (1). The gland (5) is fastened to the base (1) by setting the first screw (3), and the other side of the base (1) is connected with a ring-shaped elastic collet (7), and also includes a taper sleeve ( 6), the anti-rotation screw (2) and the horizontal screw rod (4), the outer surface of the tapered sleeve (6) is in contact with the inner surface of the elastic jacket (7), and the elastic jacket (7) is in contact with the base ( 1) threaded connection, the anti-rotation screw (2) is connected to the taper sleeve (6), and is in clearance fit with the base (1), and the taper sleeve (6) is also threaded to the screw rod (4), The head end of the screw (4) is provided with a shaft shoulder, and the end is provided with a trapezoidal thread, and the center of the taper sleeve (6) is provided with a screw hole matching the trapezoidal thread of the screw (4), and the screw (4) passes through the base ( 1), the center of the gland (5) and the elastic collet (7), and fasten with the tapered sleeve (6) through the trapezoidal thread. 2. The all-position automatic welding inner support elastic pin of the catheter according to claim 1, characterized in that: the elastic jacket (7) is made of 9SiCr. 3. The all-position automatic welding inner support elastic pin of the catheter according to claim 1, characterized in that: the elastic jacket (7) is uniformly arranged with 16 slots along the circumferential direction. 4. The all-position automatic welding inner support elastic pin of the catheter according to claim 1, characterized in that the outer surface of the taper sleeve (6) is a tapered surface.