Pin hole inserting and pulling structure for tension beam of hydrostatic testing machine

Abstract

The utility model relates to the technical field of pipe manufacturing equipment, in particular to a tension beam plugging pin hole structure of a hydrostatic testing machine, which comprises a movable rack and a fixed rack which are horizontally arranged at intervals, two groups of tension beams which are connected with the fixed rack and are longitudinally arranged at intervals, and plugging pin shafts which are respectively arranged on two sides of the movable rack and are vertically arranged at intervals, the two vertical plates are horizontally arranged at intervals, the round holes are formed in the two vertical plates and horizontally arranged at intervals, the thick-wall steel pipes are arranged on the inner walls of the two correspondingly-arranged round holes, the cross section cavity of each thick-wall steel pipe is in a pear shape, the large-diameter end of each pear shape is located on one side of the fixed rack, and the large-diameter end of each pear shape is located on the other side of the fixed rack. The hole distance between every two adjacent thick-wall steel pipes is 700 mm. The alignment operation of the plugging pin shaft and the thick-wall steel pipe in the structure is simple, convenient and rapid, and compared with a traditional mode, the production efficiency when the length specification of the steel pipe is changed to carry out a hydrostatic test is greatly improved, and smooth operation of an automatic production line in the steel pipe machining industry is promoted.

Description

Technical Field

[0001] This utility model relates to the field of pipe manufacturing equipment technology, specifically to a structure for inserting and removing pin holes in the tension beam of a hydrostatic testing machine. Background Technology

[0002] A hydrostatic testing machine is a device used to conduct pressure tests on the produced welded steel pipes. Its purpose is to inspect the welding quality of the weld seam, thereby determining whether the steel pipe meets relevant standards and user needs. It is a quality inspection device suitable for various welded pipe manufacturing enterprises.

[0003] Currently, when conducting hydrostatic tests on large-diameter welded pipes of varying lengths, the insertion and removal pin holes of the tension beams in hydrostatic testing machines used both domestically and internationally generally employ a circular hole design. This design necessitates high processing precision. Furthermore, the alignment accuracy between the insertion and removal pins and the circular holes must meet stringent standards during the moving frame operation. Additionally, once the tension beam deforms, the operation of the insertion and removal pins becomes difficult, often requiring manual intervention for adjustment. This undoubtedly presents an obstacle to the automated production process of varying steel pipe lengths. Utility Model Content

[0004] The purpose of this utility model is to provide a structure for the insertion and removal pin hole of the tension beam in a hydrostatic testing machine, which solves the problem of the existing structure for the insertion and removal pin hole of the tension beam in a hydrostatic testing machine. The existing structure uses a round hole insertion and removal pin design, which requires high machining accuracy and precise alignment. Furthermore, the deformation of the tension beam makes the insertion and removal pin operation difficult and requires manual adjustment, thus hindering the automated production of steel pipe length changes.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic pressure testing machine tension beam insertion and extraction pin hole structure, comprising a horizontally spaced movable frame and a fixed frame, two sets of tension beams connected to the fixed frame and arranged longitudinally at intervals, and insertion and extraction pins respectively arranged on both sides of the movable frame and arranged vertically at intervals. The movable frame is slidably connected to both sets of tension beams and can move horizontally along the length direction of the two sets of tension beams. Each set of tension beams consists of two horizontally spaced tension beams; each tension beam includes two horizontally spaced vertical plates and is arranged on... The system comprises two flat plates arranged longitudinally between two vertical plates, end caps located at both ends of the two vertical plates, a base plate located on the underside of the two vertical plates and connected to the end caps, multiple horizontally spaced circular holes on the two vertical plates, and thick-walled steel pipes on the inner walls of two corresponding circular holes. The cross-sectional cavity shape of the thick-walled steel pipes is pear-shaped, with the large-diameter end of the pear shape located on one side of the fixed frame. The hole spacing between two adjacent thick-walled steel pipes is 700mm. The end caps are connected to one side of the two flat plates, and the base plate is connected to the underside of one of the flat plates.

[0006] Furthermore, the insertion pin includes a mounting bracket on one side of the movable frame, a hydraulic cylinder connected to one side of the mounting bracket, and a positioning pin connected to the output end of the hydraulic cylinder and inserted into the thick-walled steel pipe.

[0007] Furthermore, a hydraulic cylinder is provided on one side of the fixed frame, and the output end of the hydraulic cylinder is connected to a test head seat located between the fixed frame and the movable frame. A second sealing disc is provided on one side of the test head seat, and a first sealing disc corresponding to the second sealing disc is provided on one side of the movable frame.

[0008] Furthermore, the lower side of the test head is provided with two sets of pulleys, one set of which slides into contact with the upper side of a tension beam located below.

[0009] Furthermore, a drive motor is provided on one side of the mobile frame, and a transverse slide rail is provided on the outer side of a set of tension beams located below. Travel guide wheels that are respectively connected to both sides of the mobile frame are slidably fitted on the transverse slide rails. Two travel wheels are slidably fitted on the upper side of a set of tension beams located below. The travel wheels are located on the travel guide wheels and are connected to one side of the mobile frame.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] This invention addresses the need for varying steel pipe lengths by innovating the traditional round hole design, which required precise positioning with a pear-shaped cavity, into a thick-walled steel pipe. This eliminates the need for cumbersome precise positioning when inserting the pear-shaped hole into the thick-walled pipe, significantly simplifying the process. During the hydrostatic test, the powerful force of the hydraulic cylinder on one side of the fixed frame, combined with the reaction force from the water pressure, moves the frame, causing the pear-shaped hole to move synchronously. In this process, the pear-shaped hole tightly engages with the small-diameter semicircular surface of the hole, successfully completing the positioning task. This not only enables intelligent automatic adjustment of the moving frame during steel pipe length changes but also ensures full automation of the entire production process, eliminating the need for manual intervention. The alignment of the pear-shaped hole with the thick-walled steel pipe is simple and quick, greatly improving production efficiency during hydrostatic testing when changing steel pipe lengths compared to traditional methods, and promoting the smooth operation of automated production lines in the steel pipe processing industry. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the insertion and removal pin hole of the tension beam in the hydraulic testing machine of this utility model;

[0013] Figure 2 This is a side view schematic diagram of the insertion and removal pin hole structure of the tension beam of the hydraulic testing machine of this utility model;

[0014] Figure 3 This is a schematic diagram of the tension beam of this utility model;

[0015] Figure 4 For the present utility model Figure 3 Enlarged view of point A in the middle;

[0016] Figure 5 This is a cross-sectional schematic diagram of the tension beam of this utility model;

[0017] Figure 6 This is a side view schematic diagram of the tension beam of this utility model;

[0018] Figure 7 This is a cross-sectional schematic diagram of the plug-in pin of this utility model.

[0019] In the diagram: 1. Moving frame; 2. Drive motor; 3. Guide wheel; 4. First sealing disc; 5. Walking wheel; 6. Fixed frame; 7. Hydraulic cylinder; 8. Test head seat; 9. Second sealing disc; 10. Tension beam; 11. Vertical plate; 12. Flat plate; 13. End sealing plate; 14. Base plate; 15. Round hole; 16. Thick-walled steel pipe; 17. Insertion pin; 18. Mounting bracket; 19. Hydraulic cylinder; 20. Positioning pin; 21. Pulley. Detailed Implementation

[0020] Please see Figure 1-7A hydraulic pressure testing machine tension beam insertion and extraction pin hole structure includes a horizontally spaced movable frame 1 and a fixed frame 6, two sets of tension beams 10 connected to the fixed frame 6 and arranged longitudinally at intervals, and insertion and extraction pins 17 respectively arranged on both sides of the movable frame 1 and arranged vertically at intervals. The movable frame 1 is slidably connected to both sets of tension beams 10 and can move horizontally along the length direction of the two sets of tension beams 10. Each set of tension beams 10 consists of two horizontally spaced tension beams 10. The tension beam 10 includes two horizontally spaced vertical plates 11, two longitudinally spaced flat plates 12 welded between the two vertical plates 11, end sealing plates 13 respectively welded to both ends of the two vertical plates 11, and a base plate welded to the lower side of the two vertical plates 11 and connected to the end sealing plates 13. 14. Multiple horizontally spaced circular holes 15 are provided on two vertical plates 11. Thick-walled steel pipes 16 are welded to the inner walls of the corresponding two circular holes 15. End caps 13 are connected to one side of two flat plates 12, and bottom plate 14 is connected to the lower side of one flat plate 12. The two vertical plates 11, two flat plates 12, and two end caps 13 are welded together to form a box-type tension beam 10. After welding, the tension beam 10 is annealed to relieve stress. The cross-sectional cavity shape of the thick-walled steel pipe 16 is pear-shaped, and the large diameter end of the pear shape is located on one side of the fixed frame 6. The hole spacing between two adjacent thick-walled steel pipes 16 is 700mm. The small diameter of the pear shape has tolerance, while the large diameter of the pear shape does not have tolerance. The center of the small diameter hole and the center of the large diameter hole of the pear shape are a certain distance apart in the length direction. When the steel pipe needs to be adjusted to different length specifications, the moving frame 1 is initially in a free state. At this time, after receiving an electrical command from the controller, the insertion pin 17 is pulled out from inside the thick-walled steel pipe 16. Once the insertion pin 17 is fully pulled out, the moving frame 1 begins to move according to the controller's command until it stops at the pear-shaped large-diameter hole position of the thick-walled steel pipe 16 corresponding to the required steel pipe length (this process does not require millimeter-level positioning). Subsequently, the four insertion pins 17 are precisely inserted into the pear-shaped large-diameter holes of the thick-walled steel pipe 16 connected to the four tension beams 10 according to the electrical positioning signal issued by the controller. Once the electrical system detects that these insertion pins 17 have been accurately positioned, the steel pipe hydrostatic testing machine is started. During the pipe pressure test, the hydraulic cylinder 7 on one side of the fixed frame 6 applies force, which, together with the reaction force generated by the water pressure, causes the moving frame 1 to make fine adjustments, driving the insertion pin 17 to move until they are tightly fitted with the semicircular surface of the pear-shaped small-diameter hole of the thick-walled steel pipe 16, completing the precise positioning. At this time, the mating surface of the pear-shaped small-diameter hole and the insertion pin 17 can withstand the reaction force of the water pressure, thereby realizing the automatic adjustment of the moving frame 1 during the change of steel pipe length, ensuring a fully automated production process without manual intervention. The alignment operation of the insertion pin 17 and the thick-walled steel pipe 16 in this structure is simple and quick, greatly improving the production efficiency when changing the length specifications of the steel pipe for water pressure testing, and truly realizing the smooth operation of the automated production line.

[0021] The insertion pin 17 includes a mounting bracket 18 on one side of the mobile frame 1, a hydraulic cylinder 19 connected to one side of the mounting bracket 18, and a positioning pin 20 connected to the output end of the hydraulic cylinder 19 and inserted into the thick-walled steel pipe 16. When the insertion pin 17 is inserted into the thick-walled steel pipe 16, the hydraulic cylinder 19 is controlled by the controller and drives the positioning pin 20 connected to it to be inserted into the thick-walled steel pipe 16 to achieve positioning.

[0022] A hydraulic cylinder 7 is provided on one side of the fixed frame 6. The output end of the hydraulic cylinder 7 is connected to a test head seat 8 located between the fixed frame 6 and the movable frame 1. A second sealing disc 9 is provided on one side of the test head seat 8, and a first sealing disc 4 corresponding to the second sealing disc 9 is provided on one side of the movable frame 1. When the steel pipe hydrostatic testing machine is started, during the steel pipe pressure test, the controller instructs the hydraulic cylinder 7 to apply pressure, and the first sealing disc 4 and the second sealing disc 9 seal the two ends of the steel pipe.

[0023] Two sets of pulleys 21 are provided on the lower side of the test head seat 8. One set of pulleys 21 slides in contact with the upper side of a tension beam 10 located below. When the hydraulic cylinder 7 drives the test head seat 8 to move, the pulleys 21 connected to the test head seat 8 slide on the two tension beams 10 located below, which improves the stability of the movement of the test head seat 8.

[0024] A drive motor 2 is provided on one side of the mobile frame 1. A set of tension beams 10 located below are provided with transverse slide rails on their outer sides. Travel guide wheels 3, which are respectively connected to both sides of the mobile frame 1, are slidably fitted on the transverse slide rails. Two travel wheels 5 are slidably fitted on the upper side of the set of tension beams 10 located below. The travel wheels 5 are located on the travel guide wheels 3 and are connected to one side of the mobile frame 1. A rack is provided on one side of the tension beams 10 located below. The gear connected to the output shaft of the drive motor 2 engages with the rack to drive the mobile frame 1 to move. While moving, the two travel wheels 5 slide and displace on the upper side of the two tension beams 10 located below. The two travel guide wheels 3 slide and move laterally on the transverse slide rails respectively, thereby facilitating the horizontal movement of the mobile frame 1 along the length of the four tension beams 10.

[0025] Working Principle: When the steel pipe needs to be adjusted to different length specifications, the moving frame 1 is initially in a free state. At this time, after receiving an electrical command from the controller, the hydraulic cylinder 19 drives the positioning pin 20 connected to it to be pulled out from inside the thick-walled steel pipe 16. Once the positioning pin 20 is fully pulled out, the drive motor 2 installed on the moving frame 1 starts to operate according to the controller's command. The gear and rack connected to the output shaft of the drive motor 2 engage to drive the moving frame 1 to move. While moving, the two traveling wheels 5 slide on the upper side of the two tension beams 10 located below, and the two traveling guide wheels 3 slide laterally on the transverse slide rails until they reach the pear-shaped large-diameter hole of the thick-walled steel pipe 16 corresponding to the required steel pipe length and stop (this process does not require millimeter-level positioning). Subsequently, the four insertion pins 17 are precisely inserted into the pear-shaped large-diameter holes of the thick-walled steel pipe 16 connected to the four tension beams 10 according to the electrical positioning signal issued by the controller. Once the electrical system detects that these insertion pins 17 have been inserted, the system will automatically stop the movement. Once accurately positioned, the steel pipe hydrostatic testing machine starts immediately. During the pressure test of the steel pipe, the hydraulic cylinder 7 drives the test head seat 8 to move. The first sealing plate 4 and the second sealing plate 9 seal both ends of the steel pipe. The pulley 21 connected to the test head seat 8 slides on the two tension beams 10 located below. The hydraulic cylinder 7 on one side of the fixed frame 6 applies force, which works together with the reaction force generated by the water pressure to make the moving frame 1 make fine adjustments, driving the insertion pin 17 to move until they are tightly fitted with the semi-circular surface of the pear-shaped small diameter hole of the thick-walled steel pipe 16, completing the precise positioning. At this time, the mating surface of the pear-shaped small diameter hole and the insertion pin 17 can withstand the reaction force of the water pressure, thus realizing the automatic adjustment of the moving frame 1 during the steel pipe length change process, ensuring a fully automated production process without manual intervention. The alignment operation of the insertion pin 17 and the thick-walled steel pipe 16 in this structure is simple and quick, greatly improving the production efficiency when changing the steel pipe length specifications for hydrostatic testing, and truly realizing the smooth operation of the automated production line.

[0026] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydraulic pressure testing machine tension beam insertion and extraction pin hole structure, comprising a horizontally spaced movable frame (1) and a fixed frame (6), two sets of tension beams (10) connected to the fixed frame (6) and arranged longitudinally at intervals, and insertion and extraction pins (17) respectively arranged on both sides of the movable frame (1) and arranged vertically at intervals, wherein the movable frame (1) is slidably connected to the two sets of tension beams (10) and can move horizontally along the length direction of the two sets of tension beams (10), and one set of tension beams (10) is composed of two horizontally spaced tension beams (10); characterized in that, The tension beam (10) includes two horizontally spaced vertical plates (11), two longitudinally spaced flat plates (12) between the two vertical plates (11), end caps (13) on both ends of the two vertical plates (11), a bottom plate (14) on the lower side of the two vertical plates (11) and connected to the end caps (13), multiple horizontally spaced circular holes (15) on the two vertical plates (11), and thick-walled steel pipes (16) on the inner walls of the corresponding two circular holes (15). The cross-sectional cavity shape of the thick-walled steel pipe (16) is pear-shaped, and the large diameter end of the pear shape is located on one side of the fixed frame (6). The hole spacing between two adjacent thick-walled steel pipes (16) is 700mm. The end caps (13) are connected to one side of the two flat plates (12), and the bottom plate (14) is connected to the lower side of one flat plate (12).

2. The structure of the insertion and extraction pin hole for the tension beam of a hydraulic testing machine as described in claim 1, characterized in that, The insertion pin (17) includes a mounting bracket (18) on one side of the mobile frame (1), a hydraulic cylinder (19) connected to one side of the mounting bracket (18), and a positioning pin (20) connected to the output end of the hydraulic cylinder (19) and inserted into the thick-walled steel pipe (16).

3. The structure of the insertion and extraction pin hole for the tension beam of a hydraulic testing machine as described in claim 1, characterized in that, A hydraulic cylinder (7) is provided on one side of the fixed frame (6). The output end of the hydraulic cylinder (7) is connected to a test head seat (8) located between the fixed frame (6) and the movable frame (1). A second sealing disc (9) is provided on one side of the test head seat (8). A first sealing disc (4) corresponding to the second sealing disc (9) is provided on one side of the movable frame (1).

4. The structure of the insertion and extraction pin hole for the tension beam of a hydraulic testing machine as described in claim 3, characterized in that, The test head (8) is provided with two sets of pulleys (21) on the lower side, and one set of pulleys (21) slides in cooperation with the upper side of a tension beam (10) located below.

5. The structure of the insertion and extraction pin hole for the tension beam of a hydraulic testing machine as described in claim 1, characterized in that, A drive motor (2) is provided on one side of the mobile frame (1). A set of tension beams (10) located below are provided with transverse slide rails on their outer sides. The transverse slide rails are slidably fitted with walking guide wheels (3) that are connected to both sides of the mobile frame (1). Two walking wheels (5) are slidably fitted on the upper side of the set of tension beams (10) located below. The walking wheels (5) are located on the walking guide wheels (3) and are connected to one side of the mobile frame (1).

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