A steel structure cargo rear pocket stabilizing connection structure

Abstract

This utility model discloses a stable connection structure for a steel structure cargo carrier rear pocket, belonging to the technical field of steel pipe weld grinding equipment; it includes: a support frame, two sets symmetrically arranged; a support base plate, disposed above the support frame; a cargo carrier rear pocket, disposed on the support base plate; a flexible connecting rod for the rear pocket, with its first end hinged to the rear side of the inspection vehicle and its second end hinged to the front side of the support base plate; a main damping telescopic rod, disposed below the support base plate; the first end of the main damping telescopic rod is hinged to the rear side of the inspection vehicle, and its second end is hinged to the support base plate; and a secondary damping telescopic rod, inclinedly disposed above the main damping telescopic rod; the first end of the secondary damping telescopic rod is hinged to the rear side of the inspection vehicle, and its second end is hinged to the rod body of the main damping telescopic rod. This improves the stability of the cargo carrier rear pocket when it is dragged along the inner wall of the steel pipe.

Description

Technical Field

[0001] This utility model belongs to the technical field of steel pipe weld grinding equipment, specifically relating to a stable connection structure for a steel structure carrying rear pocket. Background Technology

[0002] Ultra-large diameter steel pipes typically refer to straight seam submerged arc welded pipes or spiral submerged arc welded pipes with a nominal diameter ≥ 1422 mm. In major industrial fields such as long-distance oil and gas pipelines, large-scale chemical equipment, marine engineering structures, and municipal water pipelines, they are core components for media transportation and structural support. During manufacturing, these steel pipes are formed by rolling and splicing steel plates using welding processes (such as submerged arc welding and gas shielded welding). The weld seam, as a critical connection point, directly determines the pipe's load-bearing capacity, corrosion resistance, and subsequent assembly compatibility through its surface quality and geometric precision. Therefore, weld seam grinding, as a core post-processing step in steel pipe manufacturing, requires precise control of weld reinforcement and misalignment to eliminate defects such as welding spatter and weld beads. This ensures a smooth transition between the weld seam area and the base material surface, meeting the requirements of subsequent anti-corrosion coating application and pipe butt welding.

[0003] Traditional weld grinding relies on manual labor. However, ultra-large diameter steel pipes are long and have a large circumference, and their welds are more prominent than those of ordinary steel pipes. Manual grinding is time-consuming, labor-intensive, and inefficient. Therefore, specialized grinding equipment is typically used for grinding the inner welds of ultra-large diameter steel pipes. Grinding trailers are one type of such equipment, consisting of three main parts: the grinding assembly at the front, responsible for the actual grinding work; the inspection vehicle in the middle, which mainly supports various inspection components and drive modules; and the cargo basket at the rear, which mainly supports tools and supplies used during the grinding process. These three parts are towed together in sequence.

[0004] The following problems may occur when the grinding trailer travels inside the extra-large diameter steel pipe: Due to the curved structure of the inner wall of the extra-large diameter steel pipe, the cargo bag itself will be unstable during movement due to the curved structure of the inner wall of the steel pipe; in addition, since the weld seam is higher than the surface of the inner wall of the steel pipe, the wheels of the cargo bag will tilt when they move to the weld seam protrusion, causing the cargo bag to become unbalanced, reducing the pressure of contact with the inner wall of the steel pipe, and affecting the movement stability of the cargo bag. Summary of the Invention

[0005] This utility model provides a stable connection structure for a steel structure cargo rear bag. In addition to the towing connection structure between the cargo rear bag and the front inspection vehicle, a damping rod movable connection structure is also provided. The damping rod consists of a main damping rod and a secondary damping rod. The main damping rod is horizontally set, and the secondary damping rod is inclined, with its end hinged to the main damping rod, forming a downward force. The main damping rod and the secondary damping rod work together to prevent the cargo rear bag from tilting or lifting up due to unevenness of the inner wall of the steel pipe. The damping rod has a telescopic space, which prevents structural deformation of the connection part under strong tension or compression, unlike a rigid connection. In addition, the inclined secondary damping rod has a downward force on the cargo rear bag chassis. When the cargo rear bag tilts, it can increase the contact pressure between the cargo rear bag chassis and the inner wall of the steel pipe, avoiding the cargo rear bag from tipping over due to insufficient contact pressure.

[0006] To achieve the above-mentioned technical objectives, this utility model is implemented through the following technical solution: A steel structure cargo carrier rear sump stabilizing connection structure includes: Support brackets, arranged symmetrically in two sets; A base plate is provided above the support frame; A cargo pocket is provided on the supporting base plate; The rear pocket flexible connecting rod has its first end hinged to the rear side of the inspection vehicle and its second end hinged to the front side of the supporting base plate; A main damping telescopic rod is installed below the supporting base plate; the first end of the main damping telescopic rod is hinged to the rear side of the inspection vehicle, and the second end is hinged to the bottom of the supporting base plate. A secondary damping telescopic rod is inclinedly disposed above the main damping telescopic rod; the first end of the secondary damping telescopic rod is hinged to the rear side of the inspection vehicle, and the second end is hinged to the rod body of the main damping telescopic rod.

[0007] Preferably, a hinged seat is provided at the second end of the main damping telescopic rod; A universal joint is provided above the hinge seat, and the universal joint is located below the supporting base plate; The universal joint can expand the hinge angle of the second end of the main damping telescopic rod, which can accommodate a larger tilt of the rear wheel when carrying cargo.

[0008] Preferably, the universal joint includes: A bushing is provided below the supporting base plate, and a spherical hollow groove is formed inside the bushing; The sphere is movably disposed within the spherical hollow groove and cannot fall out of the spherical hollow groove; a portion of the sphere protrudes from the lower opening of the bushing; The shaft disk has its upper surface disposed on the surface of the sphere and its lower surface disposed on the hinge seat.

[0009] Preferably, the rear pocket flexible connecting rod includes a spring section and a straight rod section; The spring segment is connected end-to-end to the straight rod segment; The head end of the spring segment is hinged to the rear side of the testing vehicle, and the tail end of the straight rod segment is hinged to the front side of the supporting base plate.

[0010] Preferably, at least three sets of spring segments are provided, and the three sets of spring segments are respectively distributed at the three vertices of an equilateral triangle; At least two sets of straight rod segments are provided, and the two sets of straight rod segments are arranged in parallel. Multiple sets of spring segments and straight rod segments can improve the overall strength of the rear pocket flexible connecting rod, and the arrangement of the spring segments can improve the flexibility balance of the spring flexible connection.

[0011] Preferably, a rear support screw is provided between the support frame and the support base plate; A set of rear support screws is provided at each of the four corners near the support base plate. The lower end of the rear support screw is provided on the support frame, and the upper end of the rear support screw passes through the support base plate. A nut is screwed on the upper end of the rear support screw and the nut is screwed to fit the upper surface of the support base plate. A support screw spring sleeve is fitted around the outer periphery of the rear support screw. The lower end of the support screw spring sleeve is located on the support frame, and the upper end is located on the bottom surface of the support base plate.

[0012] Preferably, a set of bearing sleeves is provided at each of the two ends below the support frame, and a shaft is movably installed inside the bearing sleeve. A movable wheel is provided at the lower end of the shaft; the shaft drives the movable wheel to rotate 360° to form a universal wheel.

[0013] Preferably, a bearing sleeve side rod is provided on each side of the bearing sleeve; One of the bearing sleeve side rods is hinged at the upper end below the support frame; The upper end of the other bearing sleeve side rod is hinged to the tail end of the movable rod, the head end of the movable rod passes through the movable rod insert sleeve, and there is no restrictive connection structure between the movable rod and the movable rod insert sleeve; The movable rod is hinged and connected above the support frame; Two spring sleeves are fitted around the outer periphery of the movable rod. The first spring sleeve is located on the side of the movable rod insert sleeve towards the head end of the movable rod; the second spring sleeve is located on the side of the movable rod insert sleeve towards the tail end of the movable rod. A nut is provided at the head end of the movable rod. The head end of the first spring sleeve is located on the nut, and the tail end is located on the insert sleeve. The head end of the second spring sleeve is located on the insert sleeve, and the tail end is located on the tail hinge rod of the movable rod.

[0014] The beneficial effects of this utility model are: This utility model provides a stable connection structure for a steel structure cargo rear pocket. A flexible connecting rod is installed between the rear pocket and the inspection vehicle at the front to accommodate the possibility of wheel tilting during the movement of the cargo rear pocket within the steel pipe, which could cause the rear pocket to tilt. The main and secondary damping telescopic rods are also designed to accommodate the tilting of the cargo rear pocket due to wheel tilting and to improve the connection stability between the rear pocket and the inspection vehicle. The secondary damping telescopic rod is angled and hinged at its end to the main damping telescopic rod. The secondary damping telescopic rod generates a downward-sloping force component. When the rear pocket becomes unbalanced due to wheel tilting, the force provided by the secondary damping telescopic rod from the downward angle increases the pressure between the rear pocket and the inner wall of the steel pipe, preventing the rear pocket from tipping over due to insufficient pressure between the wheels and the inner wall of the steel pipe when the rear pocket is unbalanced. A rear pocket support screw is installed between the rear pocket support base plate and the support frame. A support screw spring sleeve is fitted around the outer periphery of the rear pocket support screw. When the rear pocket bumps, the support screw spring sleeve can play a shock-absorbing role. The movable wheels located at the lower ends of the two sets of support frames are responsible for the overall movement of the rear basket. The movable wheels are set in the bearing sleeves through axles, making the movable wheels universal wheels. The bearing sleeve side rods on both sides of the bearing sleeves are hinged to the support frames. One of the bearing sleeve side rods is hinged to a movable rod at its upper end. The movable rod passes through a movable rod insert sleeve, which is hinged to the upper part of the support frame. The above structure allows the movable wheels to swing in the direction of movement, which can adapt to the curvature of the inner wall of the steel pipe and reduce vibration when passing through weld protrusions. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the entire utility model from perspective 1; Figure 2This is a schematic diagram of the entire utility model from perspective 2, showing the positional and structural relationship between the main damping telescopic rod, the secondary damping telescopic rod, and the rear flexible connecting rod. Figure 3 This is a bottom view schematic diagram of the present invention, showing the connection structure of the telescopic end of the main damping telescopic rod below the supporting base plate; Figure 4 This is a rear-view schematic diagram of the present invention, illustrating the structure of the universal joint.

[0017] Figure 5 This is a partially enlarged schematic diagram A, showing the structure of the movable rod and the externally sleeved movable rod spring sleeve.

[0018] In the attached diagram, the structural names represented by each number are as follows: 1-Inspection vehicle, 2-Cargo rear pocket, 3-Supporting base plate, 4-Supporting frame, 5-Rear pocket support screw, 6-Support screw spring sleeve, 7-Moving wheel, 701-Bearing sleeve, 702-Bearing sleeve side rod, 703-Moving rod through sleeve, 704-Moving rod, 705-Moving rod spring sleeve, 8-Rear pocket flexible connecting rod, 9-Main damping telescopic rod, 10-Secondary damping telescopic rod, 11-Universal shaft, 1101-Shaft sleeve, 1102-Spherical body, 1103-Shaft disc. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0020] Example 1 like Figure 1 As shown, a steel structure cargo rear pocket stable connection structure includes: two sets of support frames 4 symmetrically arranged, a support base plate 3 is set above the support frame 4, and a cargo rear pocket 2 is set above the support base plate 3. Tools and other items needed for steel pipe grinding are placed in the cargo rear pocket 2. A rear support screw 5 is installed between the supporting base plate 3 and the supporting frame 4 for support. One rear support screw 5 is installed at each of the four corners near the supporting base plate 3. The lower end of the rear support screw 5 is attached to the supporting frame 4, and the upper end passes through the supporting base plate 3. There is no restrictive connection between the rear support screw 5 and the supporting base plate 3, meaning the supporting base plate 3 can move vertically relative to the rear support screw 5. A nut is screwed onto the upper end of the rear support screw 5, and the nut is screwed until it fits against the upper surface of the supporting base plate 3. A support is fitted around the outer periphery of the rear support screw 5. The lower end of the support screw spring sleeve 6 is set on the support frame 4, and the upper end is set on the lower bottom surface of the support base plate 3. The nut at the upper end of the rear pocket support screw 5 limits the upward movement of the support base plate 3 as a whole. When the rear pocket 2 moves inside the steel pipe, if it encounters a protruding weld and causes bumps, the support screw spring sleeve 6 can play a shock-absorbing role. At the same time, due to the presence of the support screw spring sleeve 6, an elastic connection is formed between the rear pocket 2 and the support frame 4. Compared with a rigid connection, the connection structure is less prone to structural deformation when bumps and vibrations occur. The cargo rear bag 2 is towed by the front inspection vehicle 1. The cargo rear bag 2 and the inspection vehicle 1 are connected by a flexible connecting rod 8. A hinge seat is set on the rear side of the inspection vehicle 1. The first end of the flexible connecting rod 8 is hinged to the hinge seat on the rear side of the inspection vehicle 1, and the second end is hinged to the hinge seat on the front side of the supporting base plate 3. The flexible connecting rod 8 forms a flexible towing connection between the cargo rear bag 2 and the inspection vehicle 1. During the process of the cargo rear bag 2 being towed inside the steel pipe, due to the curved structure inside the steel pipe, the cargo rear bag 2 is prone to wheel lifting, tilting, etc. The rigid connection is prone to structural deformation or even breakage of the connection part when the above situations occur. In a preferred embodiment, the rear pocket flexible connecting rod 8 includes a spring segment and a straight rod segment. The spring segment and the straight rod segment are connected end to end. A connecting block is provided at both the head and tail ends of the spring segment. A hinge buckle is provided on the connecting block at the head end. The hinge buckle is provided on the hinge seat at the rear of the inspection vehicle 1. Three sets of spring segments are provided, and the three sets of spring segments are provided at the three vertices of an equilateral triangle. The spring segments arranged in an equilateral triangle form a more stable structure. A straight rod segment is provided on the connecting block at the tail end of the spring segment. Two sets of straight rod segments are provided to enhance the overall strength of the rear pocket flexible connecting rod 8. The tail end of the straight rod segment is hinged to the hinge seat at the front of the supporting base plate 3. A main damping telescopic rod 9 is installed below the supporting base plate 3. The first end of the main damping telescopic rod 9 is hinged to the rear hinge seat of the inspection vehicle 1, and the second end is hinged to the bottom surface of the supporting base plate 3. A secondary damping telescopic rod 10 is installed above the main damping telescopic rod 9. The secondary damping telescopic rod 10 is inclined. The first end of the secondary damping telescopic rod 10 is hinged to the rear hinge seat of the inspection vehicle 1, and the second end is hinged to the rod body of the main damping telescopic rod 9. The articulated main damping telescopic rod 9 and secondary damping telescopic rod 10 increase the connection strength and stability between the cargo rear bag 2 and the front inspection vehicle 1, and can also adapt to situations such as the cargo rear bag 2 tilting or tilting. The tilted secondary damping telescopic rod 10 provides a downward force component. When the rear bag becomes unbalanced due to the tilting wheel, the force provided by the secondary damping telescopic rod 10 from the downward angle increases the overall pressure of the cargo rear bag 2 against the inner wall of the steel pipe, thus preventing the rear bag from tipping over due to insufficient pressure between the rear bag wheel and the inner wall of the steel pipe when the rear bag is unbalanced. As a preferred embodiment, such as Figure 3 As shown, the second end of the main damping telescopic rod 9 is hinged on the hinge seat, and a universal shaft 11 is set above the hinge seat. The universal shaft 11 is set on the bottom surface of the supporting base plate 3. The universal shaft 11 can expand the hinged movement angle of the second end of the main damping telescopic rod 9 in the front and rear directions, so as to adapt to the larger tilt angle of the rear wheel of the cargo basket 2. like Figure 4 As shown, the universal joint 11 includes: A bushing 1101 has its upper surface located on the lower surface of the supporting base plate 3. A spherical hollow groove is formed inside the bushing 1101, with the opening of the spherical hollow groove located on the lower surface of the bushing 1101. A ball 1102 is movably disposed inside the bushing 1101. The ball 1102 cannot fall out of the spherical hollow groove, and a portion of the ball 1102 protrudes from the opening of the spherical hollow groove on the lower surface of the bushing 1101. A shaft disc 1103 is disposed on the protruding portion of the ball. The upper surface of the shaft disc 1103 is connected to the ball 1102, and the lower surface is provided with the aforementioned hinge seat.

[0021] A set of bearing sleeves 701 is installed at each of the two ends below the support frame 4. A shaft is movably installed inside the bearing sleeve 701. A movable wheel 7 is installed at the lower end of the shaft. The shaft drives the movable wheel 7 to rotate 360°, so that the movable wheel 7 forms a universal wheel structure.

[0022] Example 2 Based on Embodiment 1, in Embodiment 1, the wheels are made into omnidirectional wheels, which makes it convenient for the rear basket 2 to flexibly change its travel trajectory; however, when the movable wheel 7 passes through the protruding weld seam inside the steel pipe, the movable wheel 7 experiences more noticeable bumps. like Figure 1As shown, in this embodiment, a bearing sleeve side rod 702 is provided on each side of the bearing sleeve 701. The upper end of one bearing sleeve side rod 702 is hinged to the lower part of the support frame 4, and the upper end of the other bearing sleeve side rod 702 is hinged to the tail end of the movable rod 704. The head end of the movable rod 704 passes through the movable rod insertion sleeve 703. There is no restrictive connection structure between the movable rod 704 and the movable rod insertion sleeve 703. The movable rod insertion sleeve 703 is hinged to the upper part of the support frame 4, and two movable rod spring sleeves 70 are sleeved on the outer periphery of the movable rod 704. 5. The first segment of the movable rod spring sleeve 705 is located on the side of the movable rod through sleeve 703 towards the head end of the movable rod 704, and the second segment of the movable rod spring sleeve 705 is located on the side of the movable rod through sleeve 703 towards the tail end of the movable rod 704; a nut is provided at the head end of the movable rod 704, the head end of the first segment of the movable rod spring sleeve 705 is located on the nut, and the tail end is located on the movable rod through sleeve 703; the head end of the second segment of the movable rod spring sleeve 705 is located on the movable rod through sleeve 703, and the tail end is located on the hinge rod at the tail end of the movable rod 704.

[0023] The hinged bearing sleeve side rod 702 and the movable rod spring sleeve 705 structure enable the moving wheel 7 to tilt to a certain extent when encountering a protruding weld seam in the direction of travel, but always remain in contact with the inner wall of the steel pipe; the adaptive outward or inward tilting of the moving wheel 7 can reduce the bumps and vibrations when passing through the weld seam.

Claims

1. A steel structure cargo carrier rear saddle stabilizing connection structure, comprising: Support brackets are arranged in two symmetrical sets; A base plate is provided above the support frame; A cargo pocket is provided on the supporting base plate; The rear pocket flexible connecting rod has its first end hinged to the rear side of the inspection vehicle and its second end hinged to the front side of the supporting base plate; Its characteristic is that it further includes: A main damping telescopic rod is installed below the supporting base plate; the first end of the main damping telescopic rod is hinged to the rear side of the inspection vehicle, and the second end is hinged to the bottom of the supporting base plate. A secondary damping telescopic rod is inclinedly disposed above the main damping telescopic rod; the first end of the secondary damping telescopic rod is hinged to the rear side of the inspection vehicle, and the second end is hinged to the rod body of the main damping telescopic rod.

2. The steel structure cargo-carrying rear stable connection structure according to claim 1, characterized in that, The second end of the main damping telescopic rod is provided with a hinge seat; A universal joint is provided above the hinge seat, and the universal joint is located below the supporting base plate.

3. The steel structure cargo-carrying rear stable connection structure according to claim 2, characterized in that, The universal joint includes: A bushing is provided below the supporting base plate, and a spherical hollow groove is formed inside the bushing; The sphere is movably disposed within the spherical hollow groove and cannot fall out of the spherical hollow groove; a portion of the sphere protrudes from the lower opening of the bushing; The shaft disk has its upper surface disposed on the surface of the sphere and its lower surface disposed on the hinge seat.

4. The steel structure cargo-carrying rear stable connection structure according to claim 1, characterized in that, The rear pocket flexible connecting rod includes a spring section and a straight rod section; The spring segment is connected to the first and second ends of the straight rod segment; The head end of the spring segment is hinged to the rear side of the testing vehicle, and the tail end of the straight rod segment is hinged to the front side of the supporting base plate.

5. A stable connection structure for a steel structure carrying a rear cargo rack according to claim 4, characterized in that, The spring segment is provided in at least three groups, and the three groups of spring segments are respectively distributed at the three vertices of the equilateral triangle; At least two sets of straight rod segments are provided, and the two sets of straight rod segments are arranged in parallel.

6. The steel structure cargo-carrying rear stable connection structure according to claim 1, characterized in that, A rear support screw is provided between the support frame and the support base plate; A set of rear support screws is provided at each of the four corners near the support base plate. The lower end of the rear support screw is provided on the support frame, and the upper end of the rear support screw passes through the support base plate. There is no restrictive connection structure between the support base plate and the rear support screw. A nut is screwed on the upper end of the rear support screw, and the nut is screwed to fit against the upper surface of the support base plate. A support screw spring sleeve is fitted around the outer periphery of the rear support screw. The lower end of the support screw spring sleeve is located on the support frame, and the upper end is located on the bottom surface of the support base plate.

7. The steel structure cargo-carrying rear stable connection structure according to claim 1, characterized in that, A set of bearing sleeves is provided at each of the two ends below the support frame. A shaft is movably installed inside the bearing sleeve, and a movable wheel is provided at the lower end of the shaft.

8. A stable connection structure for a steel structure carrying a rear cargo rack according to claim 7, characterized in that, A bearing sleeve side rod is provided on each side of the bearing sleeve; One of the bearing sleeve side rods is hinged at the upper end below the support frame; The upper end of the other bearing sleeve measuring rod is hinged to the tail end of the movable rod, the head end of the movable rod passes through the movable rod insert sleeve, and there is no restrictive connection structure between the movable rod and the movable rod insert sleeve; The movable rod is hinged and connected above the support frame; Two spring sleeves are fitted around the outer periphery of the movable rod. The first spring sleeve is located on the side of the movable rod insert sleeve towards the head end of the movable rod; the second spring sleeve is located on the side of the movable rod insert sleeve towards the tail end of the movable rod. A nut is provided at the head end of the movable rod. The head end of the first spring sleeve is located on the nut, and the tail end is located on the insert sleeve. The head end of the second spring sleeve is located on the insert sleeve, and the tail end is located on the tail hinge rod of the movable rod.

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