Head collision device capable of reducing necking loss

Abstract

The utility model discloses a head collision device capable of reducing necking loss, which relates to the technical field of steel pipe manufacture and comprises a limit stop seat for limiting a hollow billet and a core rod body, a limit pipe is mounted on the end face, close to the hollow billet, of the limit stop seat, and the inner diameter of the limit pipe is larger than the outer diameter of a core rod section at the end of the core rod body. The inner diameter of the limiting pipe is smaller than the outer diameter of the hollow billet, an adjustable limiting structure for limiting the section of the core rod is installed on the limiting pipe and used for adjusting the length, located on the inner side of the limiting pipe, of the section of the core rod, the section of the core rod is partially inserted into the inner side of the limiting pipe, and the necking length of the hollow billet is reduced. The adjustable limiting structure for limiting the cross section of the core rod is mounted on the limiting pipe, so that the necking length of the hollow billet can be adjusted according to actual requirements, and the necking length of the hollow billet is equal to the difference between the length of the cross section of the core rod and the length from the limiting stop block to the pipe orifice of the limiting pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of steel pipe manufacturing, in particular to a butting device for reducing shrinkage loss. Background Art

[0002] CPE steel pipe unit is the abbreviation of oblique rolling perforation pipe jacking unit. It is a new way to combine the traditional perforation process with the extension process. The round billet is obliquely rolled and perforated into a rough pipe, and then the pipe is rolled after shrinking one end. The shrinking process is an inherent process of the CPE unit, which is used to fix the mandrel head and the rough pipe to ensure that the rough pipe is tightly combined with the mandrel and the jacking frame when it is deformed by the jacking pipe.

[0003] In actual application, it is found that cutting the necking position after jacking will cause great waste, that is, the necking length is long, and the cutting will cause corresponding weight loss. Therefore, a head-butting device for reducing necking loss is proposed to improve the above problem. Utility Model Content

[0004] The purpose of the present application is to provide a collision device for reducing necking loss, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a collision device for reducing shrinkage loss, comprising a limit stopper for limiting the position of the blank tube and the mandrel body, and a limit tube is installed near the end surface of the blank tube on the limit stopper;

[0006] The inner diameter of the limiting tube is larger than the outer diameter of the core rod section at the end of the core rod body, and the inner diameter of the limiting tube is smaller than the outer diameter of the blank tube;

[0007] An adjustable limiting structure for limiting the cross section of the core rod is installed on the limiting tube, and the adjustable limiting structure is used to adjust the length of the cross section of the core rod located inside the limiting tube.

[0008] As a further supplement to the present solution, the adjustable limiting structure includes a limiting component and an adjusting component. The limiting component is installed on the inner side of the limiting tube and can slide along the axial direction of the limiting tube. The adjusting component passes through the limiting tube to adjust the position of the limiting component in the limiting tube.

[0009] As a further supplement to the present solution, the limit assembly includes a limit stopper and a first wedge block, the limit stopper is slidably fitted on the inner wall of the limit tube and can slide along the axial direction of the limit tube, and the first wedge block is fixed to the center of the end face of the limit tube close to the limit stop seat;

[0010] The adjusting assembly includes a second wedge block and an adjusting screw, the adjusting screw thread penetrates the limiting tube, and the end of the adjusting screw located inside the limiting tube is rotatably connected to the second wedge block, and the inclined surface of the second wedge block is slidably fitted with the inclined surface of the first wedge block.

[0011] As a further supplement to the present solution, an elastic stretching piece is fixedly connected between the limit stop block and the limit stop seat.

[0012] As a further supplement to the present solution, a limiting slide rod parallel to the adjusting screw rod is installed on the inner side of the limiting tube, and the second wedge block is slidably sleeved on the outer side of the limiting slide rod.

[0013] In summary, the technical effects and advantages of the utility model are:

[0014] 1. In the utility model, a limit tube is installed on the limit stopper near the end face of the raw tube, the inner diameter of the limit tube is larger than the outer diameter of the core rod section at the end of the core rod body, and the inner diameter of the limit tube is smaller than the outer diameter of the raw tube, and the core rod section is partially inserted into the inner side of the limit tube to reduce the shrinkage length of the raw tube.

[0015] 2. In the utility model, an adjustable limiting structure for limiting the cross section of the core rod is installed on the limiting tube. When the shrinkage length of the raw tube needs to be adjusted, the staff can manually rotate the adjusting screw so that the adjusting screw drives the second wedge block to move upward or downward, thereby using the second wedge block to limit the first wedge block, and then limit the limit block. The shrinkage length of the raw tube is the length of the core rod cross section minus the difference between the length of the limit block and the tube mouth of the limiting tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 is a schematic diagram of the cross-sectional structure in this embodiment 1;

[0018] Figure 2 The cross-sectional structure of the embodiment 2 is shown in FIG. Figure 1 ;

[0019] Figure 3 The cross-sectional structure of the embodiment 2 is shown in FIG. Figure 2 ;

[0020] Figure 4 This is a schematic diagram of the cross-sectional structure of the limiting tube in Embodiment 2;

[0021] Figure 5 It is a structural schematic diagram in the prior art.

[0022] In the figure: 1. Limit retaining seat; 2. Capillary tube; 3. Mandrel body; 31. Mandrel cross-section; 4. Limit tube; 41. Limit block; 42. First wedge block; 43. Elastic tension member; 44. Second wedge block; 45. Adjusting screw; 46. Limit slide bar. Specific implementation mode

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0024] Embodiment 1: A butt joint device for reducing necking loss, including a limit retaining seat 1 for limiting the capillary tube 2 and the mandrel body 3 ( Figure 5 It is a structural schematic diagram in the prior art. The mandrel cross-section 31 at the ends of the capillary tube 2 and the mandrel body 3 are both flush with the limit retaining seat 1, and the formed necking length is fixed to the length of the mandrel cross-section 31. The necking length is L1, which is longer than the actual requirement, resulting in a certain waste).

[0025] As Figure 1 shown, a limit tube 4 is installed on the end face of the limit retaining seat 1 close to the capillary tube 2. The inner diameter of the limit tube 4 is larger than the outer diameter of the mandrel cross-section 31 at the end of the mandrel body 3, and the inner diameter of the limit tube 4 is smaller than the outer diameter of the capillary tube 2. Part of the mandrel cross-section 31 is inserted into the inner side of the limit tube 4 (at this time, the necking length is L2, L2 < L1), reducing the necking length of the capillary tube 2.

[0026] It is found in actual tests that compared with the prior art, the butt joint device in this solution has significantly reduced necking length and necking quality. For example, when producing HRSG tubes, the cup bottom length is reduced from 140 to 100 mm, and the weight is reduced from 2.8 kg to 2.2 kg.

[0027] Embodiment 2: In order to adapt to different necking lengths, an adjustable limit structure for limiting the mandrel cross-section 31 is installed on the limit tube 4. The adjustable limit structure is used to adjust the length of the mandrel cross-section 31 located inside the limit tube 4. Specifically, the adjustable limit structure includes a limit component and an adjustment component. The limit component is installed inside the limit tube 4 and can slide along the axial direction of the limit tube 4. The adjustment component penetrates the limit tube 4 to adjust the position of the limit component in the limit tube 4.

[0028] More specifically, the limit assembly includes a limit stop block 41 and a first wedge block 42. The limit stop block 41 is slidably fitted on the inner wall of the limit tube 4 and can slide along the axial direction of the limit tube 4. The first wedge block 42 is fixed to the center of the end face of the limit tube 4 close to the limit stop seat 1. The adjustment assembly includes a second wedge block 44 and an adjusting screw 45. The adjusting screw 45 threadably penetrates the limit tube 4, and the end of the adjusting screw 45 located on the inner side of the limit tube 4 is rotatably connected to the second wedge block 44. The inclined surface of the second wedge block 44 is slidably fitted with the inclined surface of the first wedge block 42.

[0029] Based on the matching arrangement of the above structure, when it is necessary to adjust the shrinkage length of the capillary tube 2, the staff can manually rotate the adjusting screw 45 so that the adjusting screw 45 drives the second wedge block 44 to move upward or downward, thereby using the second wedge block 44 to limit the first wedge block 42, and then limit the limit block 41. The shrinkage length of the capillary tube 2 is the length of the core rod section 31 minus the difference between the length of the limit block 41 and the tube mouth of the limit tube 4.

[0030] An elastic stretching member 43 is fixedly connected between the limit stopper 41 and the limit stopper seat 1 . When the adjusting screw 45 drives the second wedge block 44 to move upward, the limit stopper 41 can be reset under the action of the elastic stretching member 43 .

[0031] Among them, a limiting slide rod 46 arranged parallel to the adjusting screw 45 is installed on the inner side of the limiting tube 4, and the second wedge block 44 is slidably sleeved on the outer side of the limiting slide rod 46 to ensure that the second wedge block 44 can stably move vertically under the action of the adjusting screw 45.

[0032] The working principle of this embodiment is as follows: when it is necessary to adjust the shrinkage length of the capillary tube 2, the staff can manually rotate the adjusting screw 45 so that the adjusting screw 45 drives the second wedge block 44 to move upward or downward, thereby using the second wedge block 44 to limit the first wedge block 42, and then limit the limit block 41. The shrinkage length of the capillary tube 2 is the length of the core rod section 31 minus the difference between the length of the limit block 41 and the tube mouth of the limit tube 4.

[0033] Finally, it should be noted that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A head-impacting device for reducing shrinkage loss, comprising a limit stopper (1) for limiting the position of a capillary tube (2) and a mandrel body (3), characterized in that: The limit stopper (1) is provided with a limit tube (4) near the end surface of the capillary tube (2); The inner diameter of the limiting tube (4) is larger than the outer diameter of the mandrel section (31) at the end of the mandrel body (3), and the inner diameter of the limiting tube (4) is smaller than the outer diameter of the blank tube (2); An adjustable limiting structure for limiting the position of the mandrel cross section (31) is installed on the limiting tube (4), and the adjustable limiting structure is used to adjust the length of the mandrel cross section (31) located inside the limiting tube (4).

2. A head-collision device for reducing shrinkage loss according to claim 1, characterized in that: The adjustable limiting structure comprises a limiting component and an adjusting component. The limiting component is installed on the inner side of the limiting tube (4) and can slide along the axial direction of the limiting tube (4). The adjusting component passes through the limiting tube (4) to adjust the position of the limiting component in the limiting tube (4).

3. A head-collision device for reducing shrinkage loss according to claim 2, characterized in that: The position limiting assembly comprises a position limiting block (41) and a first wedge block (42); the position limiting block (41) is slidably arranged on the inner wall of the position limiting tube (4) and is capable of sliding along the axial direction of the position limiting tube (4); the first wedge block (42) is fixed to the center of the end surface of the position limiting tube (4) close to the position limiting block seat (1); The adjustment assembly comprises a second wedge block (44) and an adjustment screw (45), wherein the adjustment screw (45) is threadedly inserted through the limiting tube (4), and the end of the adjustment screw (45) located inside the limiting tube (4) is rotatably connected to the second wedge block (44), and the inclined surface of the second wedge block (44) is slidably fitted with the inclined surface of the first wedge block (42).

4. A head-collision device for reducing shrinkage loss according to claim 3, characterized in that: An elastic stretching piece (43) is fixedly connected between the limit stop block (41) and the limit stop seat (1).

5. The device for reducing shrinkage loss according to claim 3, characterized in that: A limiting slide bar (46) arranged parallel to the adjusting screw rod (45) is installed on the inner side of the limiting tube (4), and the second wedge block (44) is slidably sleeved on the outer side of the limiting slide bar (46).

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