Bidirectional drill jig for machining circumferential tangential holes in distribution pipe

Abstract

The utility model provides a bidirectional drill jig for processing circumferential tangential holes on a distribution pipe, which comprises a gland I, a base and a gland II, the base comprises a first block body, a middle block body and a second block body, processing holes are arranged on four sides of the middle block body, and a first through hole is arranged inside the middle block body; a first notch is formed in the side face of the outer end of the first block body, the gland I is connected to the first notch, a first arc-shaped concave hole is formed in the inner side of the first block body, a second arc-shaped concave hole is formed in the inner side of the gland I, and the first arc-shaped concave hole and the second arc-shaped concave hole form a second through hole; a second notch is formed in the side face of the outer end of the second block body, a gland II is connected to the second notch, a third circular-arc-shaped concave hole is formed in the inner side of the second block body, a fourth circular-arc-shaped concave hole is formed in the inner side of the gland II, and the third circular-arc-shaped concave hole and the fourth circular-arc-shaped concave hole form a third through hole; the second through hole, the first through hole and the third through hole are sequentially communicated to form a mounting hole, and the to-be-machined distribution pipe and the core rod are mounted in the mounting hole. The utility model has the advantages of simple structure, convenience in manufacture, low cost and better practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling jig equipment, in particular to a bidirectional drilling jig for machining circumferential tangential holes on a distribution pipe. Background Art

[0002] The stripping tower is a falling film heat exchanger, in which the rationality of the distribution pipe structure design is directly related to the operation effect of the entire equipment. The manufacture of the distribution pipe, especially the dimensional accuracy of the four tangential holes on each distribution pipe, is crucial.

[0003] The traditional method of processing tangential holes in distribution pipes relies on manual positioning. This method is greatly affected by internal and external factors such as the physical condition, mental state and professional ability of the personnel. The processing accuracy is difficult to guarantee and the efficiency is extremely low. Since a device has hundreds or thousands of distribution pipes, it takes a lot of energy and time to complete the processing of all distribution pipes. If the processing accuracy does not meet the requirements, it may affect the operation effect of the entire equipment. Utility Model Content

[0004] In response to the above-mentioned technical problems of low precision and low efficiency in the manual positioning method used in the conventional tangential hole machining of the stripping tower distribution pipe, a bidirectional drilling jig for machining circumferential tangential holes on the distribution pipe is provided. The technical means adopted by the utility model are as follows:

[0005] A bidirectional drilling jig for machining circumferential tangential holes on a distribution pipe, comprising: a gland I, a base, and a gland II. The base has an hourglass-shaped structure, comprising a first block, a middle block, and a second block connected sequentially from left to right. The middle block is a square block structure, with two groups of machining holes on the four side walls, each located in the same radial plane, wherein each side wall has two machining holes in the radial direction. The interior of the middle block has a circular first through hole in the axial direction.

[0006] A first notch is formed on the outer side surface of the first block, the gland I is fixedly connected to the first notch, a first arc-shaped concave hole is formed on the inner side of the first block along the axial direction, and a second arc-shaped concave hole is formed on the inner side of the gland I along the axial direction, the first arc-shaped concave hole and the second arc-shaped concave hole are buckled together to form a circular second through hole;

[0007] A second notch is formed on the outer end side surface of the second block, the gland II is fixedly connected to the second notch, a third arc-shaped concave hole is formed on the inner side of the second block along the axial direction, and a fourth arc-shaped concave hole is formed on the inner side of the gland II along the axial direction, the third arc-shaped concave hole and the fourth arc-shaped concave hole are buckled together to form a circular third through hole;

[0008] The second through hole, the first through hole and the third through hole are coaxially connected in sequence to form a mounting hole, the distribution pipe to be processed and the core rod are installed in the mounting hole, and the core rod is inserted into the distribution pipe to be processed; the distribution pipe to be processed is fixed in the base through the fixed connection between the pressure cover I and the pressure cover II and the base.

[0009] Furthermore, it includes at least one positioning block, which is fixedly connected to the gland I and the outer end of the base through a plurality of threaded fasteners;

[0010] Alternatively, the positioning block is fixedly connected to the gland II and the outer end of the base through a plurality of threaded fasteners;

[0011] Alternatively, there are two positioning blocks, one positioning block is fixedly connected to the outer end of the gland I and the base through multiple threaded fasteners, and the other positioning block is fixedly connected to the outer end of the gland II and the base through multiple threaded fasteners.

[0012] Furthermore, the positioning block is a square block structure, and a cylindrical protrusion is provided on the inner side of the positioning block, and the cylindrical protrusion is inserted into the second through hole and / or the third through hole.

[0013] Furthermore, the first block and the second block are symmetrically arranged, and the structures of the gland I and the gland II are the same.

[0014] Furthermore, the gland I and gland II both have a square block structure.

[0015] Furthermore, the gland I is fixedly connected to the base via a plurality of threaded fasteners.

[0016] Furthermore, the gland II is fixedly connected to the base via a plurality of threaded fasteners.

[0017] Furthermore, the threaded fastener is a hexagon socket screw.

[0018] Furthermore, the cross-section of the base is square.

[0019] Compared with the prior art, the utility model has the following advantages:

[0020] The utility model has the advantages of simple structure, convenient manufacturing, low finished product cost and good practicality, and can effectively solve the problem of machining accuracy and efficiency of four tangential holes on the distribution pipe, which is a key component of the stripping tower, the core equipment of the four major parts of the pressure vessel urea. The distribution pipe is fixed by the tool drilling jig to achieve the requirement of controlling the size accuracy of the opening, and the drilling jig is designed to be bidirectional, that is, when the accuracy of one end decreases due to long-term use, it can be switched to the other end for use, thereby improving accuracy and efficiency while reducing costs and saving labor.

[0021] Based on the above reasons, the utility model can be widely promoted in the fields of processing tangential holes of distribution pipes and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention 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 some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0023] Figure 1 Schematic diagram of the workpiece tube to be processed, where (a) is the front view and (b) is the cross-sectional view at AA in (a).

[0024] Figure 2 It is a structural diagram of the present utility model.

[0025] Figure 3 It is a side view of the present utility model.

[0026] Figure 4 It is a top view of the utility model.

[0027] Figure 5 This is a structural diagram of the base, positioning block and pressure cover of the utility model.

[0028] Figure 6 It is a schematic diagram of the local structure of the utility model.

[0029] In the figure: 1. Positioning block; 2. Cover I; 3. Base; 4. Cover II; 5. Hexagon socket screw. DETAILED DESCRIPTION

[0030] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] In order to solve the problem of low processing accuracy and low efficiency when the existing tangential holes in the distribution pipe of the stripping tower are processed by manual positioning, the utility model provides a bidirectional drilling jig for processing the circumferential tangential holes on the distribution pipe, that is, a tooling that improves the positioning accuracy of the tangential holes and improves the processing efficiency at the same time, and has a simple structure, low manufacturing cost and high utilization rate.

[0032] The utility model is a bidirectional drilling jig for machining circumferential tangential holes, which is composed of a positioning block 1, a pressure cover I 2, a base 3, a pressure cover II 4 and a threaded fastener (hexagon socket screw 5). Figure 1 As shown, the base 3 is an integral base with a through hole inside. After the tooling tube and the core rod are inserted into the through hole inside the base 3 (the tooling tube is installed in the through hole, and the core rod is inserted into the center hole inside the tooling tube), the pressure cover I2 and the pressure cover II4 are fastened to the two ends of the base 3 by the hexagon socket screws 5. After the distribution pipe and the core rod are fixed, the positioning block 1 is fixed to the base 3 and the pressure cover (pressure cover I2, pressure cover II4) by the hexagon socket screws 5.

[0033] Specifically, the base 3 has an hourglass-shaped structure with a square cross-section, and is composed of a first block, a middle block, and a second block, connected sequentially from left to right. The middle block is a square block-shaped structure, with two groups of machined holes on each of its four sidewalls, each located in the same radial plane (i.e., each group has four machined holes, the four machined holes in the same group are located in the same radial plane, and the four machined holes in the same group are located on each of the four sides of the middle block). Each sidewall has two machined holes along the radial direction, and the two machined holes on the same sidewall are located in two radial planes. The interior of the middle block has a circular first through-hole along the axial direction. The outer side surface of the first block has a first notch, and the gland I2 is fixedly connected to the first notch (the gland I2 is fixedly connected to the first block via the first notch). The interior of the first block has a first arc-shaped recessed hole along the axial direction, and the interior of the gland I2 has a second arc-shaped recessed hole along the axial direction. The first and second arc-shaped recessed holes interlock to form a circular second through-hole. A second notch is formed on the outer side of the second block, and the gland II4 is fixedly connected to the second notch (the gland II4 is fixedly connected to the second block by snapping together through the second notch). A third arc-shaped recessed hole is formed on the inner side of the second block along the axial direction, and a fourth arc-shaped recessed hole is formed on the inner side of the gland II4 along the axial direction. The third arc-shaped recessed hole and the fourth arc-shaped recessed hole snap together to form a circular third through hole. The second through hole, the first through hole, and the third through hole are coaxially connected in sequence to form a mounting hole (the mounting hole is a continuous through hole formed inside the base 3). The distribution pipe to be processed and the core rod are installed in the mounting hole, and the core rod is inserted into the distribution pipe to be processed; the distribution pipe to be processed is fixed inside the base 3 by the fixed connection between the gland I2 and the gland II4 and the base 3.

[0034] There is at least one positioning block 1. The positioning block 1 is fixedly connected to the outer ends of the gland I2 and the base 3 at the same time; or, the positioning block 1 is fixedly connected to the outer ends of the gland II4 and the base 3 at the same time; or, there are two positioning blocks 1, one positioning block 1 is fixedly connected to the outer ends of the gland I2 and the base 3 at the same time, and the other positioning block 1 is fixedly connected to the outer ends of the gland II4 and the base 3 at the same time. Figure 2A positioning block 1 is provided, fixedly connected to both the outer ends of gland I2 and base 3. The positioning block 1 is square and has a cylindrical protrusion on its inner side, which inserts into the second and / or third through-holes. The positioning block 1 is connected to gland I2 and / or gland II4 via multiple hexagon socket head cap screws 5 (the hexagon socket head cap screws 5 are axially connected and are located at the four corners of the positioning block 1).

[0035] The first and second blocks are symmetrically arranged, with glands I2 and II4 having identical structures. Both glands I2 and II4 are square block-shaped. Gland I2 is secured to the base 3 via multiple hexagon socket screws 5 (the screws 5 can be radially engaged). Gland II4 is also secured to the base 3 via multiple hexagon socket screws 5 (the screws 5 can be radially engaged).

[0036] The bidirectional drilling jig tooling of the utility model should be made of a material with high hardness and good wear resistance.

[0037] The workpiece tube to be processed and the tooling core rod are respectively installed into the bidirectional drilling jig from both ends, and fixed by means of pressure covers (pressure cover Ⅰ2, pressure cover Ⅱ4) and fasteners (hexagon socket screws 5). The purpose of installing the tooling core rod is to prevent the workpiece from being drilled through.

[0038] The end is positioned with a positioning block 1 to ensure the required distance between the center line of the tangential hole and the end of the workpiece tube, and to ensure that the four tangential holes are on the same horizontal plane.

[0039] After each hole is processed, the tooling is rotated in turn to the angle required by the drawing. After one circle of processing is completed, the core rod is moved a certain distance and the next distribution pipe to be processed is loaded and continued.

[0040] The utility model is designed to be double-sided, that is, when one end is severely worn due to a large number of holes drilled, resulting in a larger hole diameter and unable to meet the processing size requirements, the other end can be switched and continued to be used.

[0041] This utility model addresses the machining accuracy and efficiency challenges of the four tangential holes in the distribution pipe—a key component of the stripping tower, one of the four core components of a urea pressure vessel. By using a jig to securely position the distribution pipe, the required hole size accuracy is achieved. Furthermore, the jig is designed to be reversible, meaning that if one end degrades due to wear and tear over time, it can be switched to the other end. This improves efficiency while reducing costs and labor.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention 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 replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bidirectional drilling jig for machining circumferential tangential holes on a distribution pipe, characterized in that: include: A gland I (2), a base (3) and a gland II (4), wherein the base (3) is an hourglass-shaped structure, comprising a first block, a middle block and a second block connected in sequence from left to right, wherein the middle block is a square block structure, and has two groups of machining holes on the four side walls, each of which is located in the same radial plane, wherein each side wall has two machining holes along the radial direction, and the interior of the middle block has a circular first through hole along the axial direction; A first notch is formed on the outer side of the first block, the pressure cover I (2) is fixedly connected to the first notch, a first arc-shaped concave hole is formed on the inner side of the first block along the axial direction, a second arc-shaped concave hole is formed on the inner side of the pressure cover I (2) along the axial direction, and the first arc-shaped concave hole and the second arc-shaped concave hole are buckled together to form a circular second through hole; A second notch is formed on the outer side of the second block, the pressure cover II (4) is fixedly connected to the second notch, a third arc-shaped concave hole is formed on the inner side of the second block along the axial direction, a fourth arc-shaped concave hole is formed on the inner side of the pressure cover II (4) along the axial direction, and the third arc-shaped concave hole and the fourth arc-shaped concave hole are buckled together to form a circular third through hole; The second through hole, the first through hole and the third through hole are coaxially connected in sequence to form a mounting hole, the distribution pipe to be processed and the core rod are installed in the mounting hole, and the core rod is inserted into the distribution pipe to be processed; the distribution pipe to be processed is fixed in the base (3) by the fixed connection between the pressure cover I (2) and the pressure cover II (4) and the base (3).

2. The bidirectional drilling jig for machining circumferential tangential holes on a distribution pipe according to claim 1, characterized in that: It also includes at least one positioning block (1), wherein the positioning block (1) is fixedly connected to the outer ends of the gland I (2) and the base (3) through a plurality of threaded fasteners; Alternatively, the positioning block (1) is fixedly connected to the outer ends of the gland II (4) and the base (3) via a plurality of threaded fasteners; Alternatively, two positioning blocks (1) are provided, one positioning block (1) being fixedly connected to the outer ends of the gland I (2) and the base (3) via a plurality of threaded fasteners, and the other positioning block (1) being fixedly connected to the outer ends of the gland II (4) and the base (3) via a plurality of threaded fasteners.

3. The bidirectional drilling jig for machining circumferential tangential holes on a distribution pipe according to claim 2, characterized in that: The positioning block (1) has a square block structure, and a cylindrical protrusion is provided on the inner side of the positioning block (1), and the cylindrical protrusion is inserted into the second through hole and / or the third through hole.

4. The bidirectional drilling jig for machining circumferential tangential holes on a distribution pipe according to claim 1, characterized in that: The first block and the second block are symmetrically arranged, and the structures of the pressure cover I (2) and the pressure cover II (4) are the same.

5. The bidirectional drilling jig for machining circumferential tangential holes on a distribution pipe according to claim 1, characterized in that: The pressure cover I (2) and the pressure cover II (4) are both square block structures.

6. The bidirectional drilling jig for machining circumferential tangential holes on a distribution pipe according to claim 1, characterized in that: The gland I (2) is fixedly connected to the base (3) via a plurality of threaded fasteners.

7. The bidirectional drilling jig for machining circumferential tangential holes on a distribution pipe according to claim 1, characterized in that: The gland II (4) is fixedly connected to the base (3) via a plurality of threaded fasteners.

8. The bidirectional drilling jig for machining circumferential tangential holes on a distribution pipe according to claim 2, 6 or 7, characterized in that: The threaded fastener is a hexagon socket screw (5).

9. The bidirectional drilling jig for machining circumferential tangential holes on a distribution pipe according to claim 1, characterized in that: The cross-section of the base (3) is square.

Images