Pipe connecting frame for thin-wall cast steel pipes

Abstract

The utility model discloses a thin-wall cast steel pipe connecting frame applied to the field of centrifugal cast steel pipes. Guide rollers are mounted on cross beams of a connecting pipe frame, and carrier rollers are mounted on longitudinal beams of the connecting pipe frame. Hinge connecting pieces are fixed on the outer sides of the longitudinal beams. The fixing legs and the hydraulic cylinders are arranged on the rail side and the guide side of the pipe connecting frame respectively and connected with the pipe connecting frame through the hinge connecting pieces. If the lower end of the hydraulic cylinder is fixed, the upper end hinge connecting piece is in clearance fit, and if the lower end is hinged and positioned, clearance fit is not needed. A guide rail end is arranged above the pipe connecting frame, and the upper plane of the guide rail does not exceed the upper edge of the carrier roller. The guide rollers are fixed on groove blocks corresponding to the cross beams, and the bottoms of the groove blocks are fixed through fastening bolts. And when the hydraulic cylinder returns, the pipe connecting frame is limited by the positioning frame. The device is simple in structure and action, and the carrier roller and the guide roller ensure the consistency of center lines.

Description

Technical Field

[0001] This utility model is applied to the field of centrifugal cast steel pipes, and relates to the pipe pushing operation of self-extracting cast steel pipes from the pipe mold, specifically a pipe support for thin-walled cast steel pipes. Background Technology

[0002] Cast steel pipes produced by horizontal centrifugal molding need to be horizontally pushed out or pulled out of the mold after solidification and cooling. A pipe-connecting frame or device is used to receive the pipe before it enters the next workstation. For thin-walled cast steel pipes, the centerline should be kept aligned during high-temperature pushing or pulling out of the mold to prevent bending. CN111531145A describes a V-wheel pipe-connecting device located in a pipe-connecting pit. The V-wheel can move up and down during the extension and retraction of the pipe-connecting hydraulic cylinder to adjust its position, ensuring the centerline of the pipe blank is aligned during pushing out, thus accommodating different specifications of cast steel pipes. Its disadvantage is that the vertical position of the V-wheel cannot be perfectly accurate each time the pipe is connected, maintaining the centerline of the cast steel pipe. Furthermore, it cannot be tilted, preventing the pipe from automatically rolling into the track, requiring overhead crane transport. CN217121685U describes a cast steel pipe blank pipe-connecting frame that, based on the above concept, adds a V-wheel self-tilting mechanism. After receiving the pipe, the V-wheel automatically tilts into the track under the action of the same hydraulic cylinder, eliminating the need for overhead crane transport. However, the structure is somewhat complex and the production cost is high. Utility Model Content

[0003] The technical problem solved by this utility model is to provide a thin-walled cast steel pipe support frame with a simple structure that can adapt to changes in the centerline of cast steel pipes of different specifications, ensure the straightness of the high-temperature thin-walled cast steel pipe during pipe pushing, and allow it to tilt so that the cast steel pipe can automatically roll into the next process.

[0004] The technical solution adopted in this utility model is as follows: The thin-walled cast steel pipe connecting frame of this utility model includes fixed legs, hydraulic cylinders, a connecting frame, rollers, guide rollers, etc. The connecting frame is a steel structure frame welded from longitudinal beams and transverse beams. Guide rollers are installed on the transverse beams to define the position of the center line of the cast steel pipe in the horizontal direction. Support members for fixing rollers are installed on the longitudinal beams, and the rollers are used to define the position of the center line of the cast steel pipe in the vertical direction. Hinged connectors are fixed on the outer side of the longitudinal beams. The fixed legs and hydraulic cylinders are respectively set on the rail side and guide side of the connecting frame, and are both connected to the connecting frame through hinged connectors.

[0005] Furthermore, the lower end of the hydraulic cylinder is fixed, and the connecting shaft of the upper hinge connector of the hydraulic cylinder is clearance-fitted with the upper and lower hinge holes. This clearance fit satisfies the rotation of the upper hinge hole around the hinge shaft on the rail side and the vertical movement of the lower hinge hole. Alternatively, the lower end of the hydraulic cylinder is hinged and positioned, and the upper hinge connector does not require a clearance fit.

[0006] Furthermore, the end of the guide rail is provided above the pipe frame, and the upper plane of the guide rail does not exceed the upper edge of the roller, so that the cast steel pipe can automatically roll into the guide rail from the pipe frame.

[0007] Furthermore, the shaft of the guide roller is fixed on the groove block, and the groove inside the groove block corresponds to the shape and size of the crossbeam. The bottom of the groove block is fixed to the crossbeam with set bolts, which facilitates the adjustment and fixation of the guide roller at different positions on the crossbeam.

[0008] Furthermore, at both ends of the idler roller shaft, limiting bars are inserted into holes in the idler roller shaft to position the idler roller and prevent it from moving laterally.

[0009] Furthermore, at the pipe end of the pipe frame, guide rollers and idler rollers are provided. The guide rollers should be close to the idler rollers, and the distance between the two rollers should be sufficient to ensure that the rigidity of the high-temperature thin-walled cast steel pipe can maintain the centerline without deviation.

[0010] Furthermore, when the hydraulic cylinder returns to its original position, the connecting pipe frame is limited by the positioning frame to ensure the consistency of the connecting pipe roller position each time.

[0011] The beneficial effects of this utility model are: it has few components and a simple structure, using only the extension and retraction of a hydraulic cylinder to complete the pipe connection and delivery operations. The cooperation between the hydraulic cylinder and the positioning frame, as well as the adjustment of the guide rollers by the tightening bolts, ensures the consistency of the center line of cast steel pipes of the same specification during the pipe pushing operation, thereby ensuring the straightness of the cast steel pipe. Attached Figure Description

[0012] Figure 1 This is a front view schematic diagram of Example 1;

[0013] Figure 2 for Figure 1 Top view;

[0014] Figure 3 for Figure 1 The left view;

[0015] Figure 4 This is a schematic diagram of the structure of Example 2;

[0016] Among them: 1-cast steel pipe, 2-guide roller, 3-support roller, 4-guide rail, 5-fixed leg, 6-hydraulic cylinder, 7-crossbeam, 8-longitudinal beam, 9-set bolt, 10-groove block, 11-limit bar, 12-connecting shaft, 13-positioning frame, 14-adjusting bolt. Detailed Implementation

[0017] In this utility model, the "purchased" components are existing technologies, such as hydraulic cylinders, idlers, and guide rollers. Structures not described in detail, such as hinged connectors and support components, are also existing technologies. The term "longitudinal" refers to the direction of the centerline of the cast steel pipe, "transverse" refers to the horizontal direction perpendicular to the longitudinal direction, "rail side" refers to the side of the pipe support where the guide rail is installed, "guide side" refers to the side of the pipe support where the guide roller is installed, and "pipe end" refers to the end of the pipe support that first receives the cast steel pipe. Example

[0018] The pipe rack structure of this embodiment is shown in the attached figure. Figure 1-3 As shown, the assembly includes fixed legs 5, hydraulic cylinders 6, a pipe frame, idler rollers 3, and guide rollers 2. The pipe frame is a steel structure frame welded from longitudinal beams 8 and transverse beams 7 to accommodate the dimensions of the cast steel pipe. Fixed hinge connectors are welded to the outside of the longitudinal beams 8. Fixed legs 5 are located on the rail side of the pipe frame, with their lower ends fixed to the ground and their upper ends hinged to the pipe frame. Hydraulic cylinders 6 are located on the guide side of the pipe frame, with their lower ends fixed to the ground and their upper ends hinged to the pipe frame. In this embodiment, four fixed legs are provided on the rail side, and two hydraulic cylinders are provided on the guide side.

[0019] On both sides of the pipe frame, fixed supports are welded to support the idler roller 3. The idler roller 3 is arranged laterally and can rotate around its axis. During pipe pushing, the cast steel pipe moves on the idler roller, and the rotation of the idler roller reduces the friction between the cast steel pipe and the idler roller, thus reducing the resistance to pipe pushing. To facilitate the replacement of the idler roller 3, the idler roller is snapped and fixed to the support. To prevent the idler roller from moving laterally, limit bars 11 are inserted into the holes in the idler roller shaft at both ends to position the idler roller and limit its lateral movement.

[0020] Guide rollers 2 are installed on the crossbeam 7 of the pipe frame. The shaft of the guide roller is fixed on the groove block 10. The groove in the groove block 10 corresponds to the shape and size of the crossbeam. The bottom of the groove block is fixed to the crossbeam with set bolts 9. If it is necessary to adjust the position of the guide roller laterally, the set bolts can be loosened first, the groove block can be slid on the crossbeam for adjustment, and then the set bolts can be used to fix it. The position adjustment of the guide roller is convenient and quick.

[0021] The end of guide rail 4 is positioned above the pipe frame, and its upper plane does not exceed the upper edge of the roller to facilitate the rolling of the cast steel pipe from the pipe frame onto the guide rail.

[0022] The attached image shows the state of the pipe rack ready for pipe connection. Figure 3As shown, the idler rollers tilt towards the guide side, and the ejected cast steel pipe is positioned by the idler rollers and guide rollers to ensure that the ejected cast steel pipe does not automatically tilt and roll towards the rail side. The cast steel pipe ejected from the pipe mold uses idler rollers to ensure its centerline is consistent vertically, and guide rollers to ensure its centerline is consistent laterally. In this way, the idler rollers and guide rollers ensure the centerline of the cast steel pipe is consistent during the pipe pushing operation, guaranteeing the straightness of the high-temperature thin-walled cast steel pipe. The position of the guide rollers is adjusted by the position of the set bolts, and the position of the idler rollers is achieved through the cooperation of a hydraulic cylinder and a positioning frame. The extension and retraction of the hydraulic cylinder rod can adjust the position of the idler rollers. When the position meets the requirements, the positioning frame 13 is fixed to the bottom of the guide side longitudinal beam, restricting the retraction position of the hydraulic cylinder rod, thereby fixing the return position of the idler rollers and ensuring the vertical direction of the cast steel pipe's centerline.

[0023] When all the cast steel pipes are supported by the pipe support frame, the hydraulic cylinder rod extends, causing the pipe support frame to rotate and tilt around the hinge axis fixed on the rail side. The rollers tilt towards the rail side, and the cast steel pipes automatically roll off the pipe support frame and onto guide rail 4, automatically rolling into the next process. However, the hinge axis on the guide side has two directions of movement: one is the up-and-down movement of the hydraulic cylinder, and the other is the rotation along the hinge axis on the rail side. To achieve these two movements simultaneously, the connection method of the guide side hinge axis is shown in the appendix. Figure 3 The enlarged view on the left shows the connecting shaft 12 with a clearance fit to the upper and lower hinge holes. The lower hinge hole is fixed to the hydraulic cylinder, and the upper hinge hole is fixed to the pipe frame. The connecting shaft 12 prevents the pipe frame from detaching from the hydraulic cylinder. The clearance fit allows for the rotation of the upper hinge hole around the hinge shaft on the rail side and the vertical movement of the lower hinge hole. Because the rotation angle of the upper hinge hole is small, the clearance size of the clearance fit is small, just enough to allow the cast steel pipe to automatically and slowly roll into the guide rail.

[0024] To ensure that the centerline of the cast steel pipe does not shift after being ejected from the pipe mold, guide rollers and support rollers are installed at the pipe end of the pipe frame. The guide rollers should be close to the support rollers, and the distance between the two rollers should be sufficient to ensure that the rigidity of the high-temperature thin-walled cast steel pipe can maintain the centerline without shifting. Example

[0025] This embodiment improves upon the hydraulic cylinder position in Embodiment 1 to eliminate the clearance between the connecting shaft 12 and the upper and lower hinge holes, as shown in the attached figure. Figure 4 As shown, the bottom end of the hydraulic cylinder 6 is hinged and positioned at the lower end of the fixed leg 5, forming a tilting cylinder. This creates a triangular, stable structure with the three hinged shafts. When the hydraulic cylinder returns to its original position and the idler roller is in the correct position, the positioning frame 13 is fixed to the bottom of the longitudinal beam. The adjusting bolt 14 at its upper end can be adjusted up and down to stabilize the return position of the hydraulic cylinder, thus achieving consistency in the return position of the idler roller. When the hydraulic cylinder extends, the connecting pipe frame tilts, rolling the cast steel pipe into the guide rail for the next process.

[0026] It should be noted that: 1) The centerlines of the cast steel pipes mentioned above are consistent and do not deviate, the purpose of which is to ensure the straightness of the cast steel pipes and prevent bending deformation, not to achieve absolute consistency or no deviation. 2) The hydraulic cylinder in Example 2 can also be set vertically. Figure 4 This is only to better illustrate the positional relationships and structural components of the positioning frame. 3) The groove and set bolt are simply a simple structure for adjusting and positioning the guide rollers. 4) Due to the light weight of the cast steel pipe and connecting pipe frame, the aforementioned hydraulic cylinder can be replaced by a pneumatic cylinder, which is a simple replacement.

[0027] This utility model has few components and a simple structure, relying solely on the extension and retraction of a hydraulic cylinder to complete the connection and delivery of thin-walled cast steel pipes. The cooperation between the hydraulic cylinder and the positioning frame ensures the correct positioning of the idler rollers each time they return to their original position, guaranteeing the vertical alignment of the centerline of cast steel pipes of the same specification. The guide rollers are fixed with set bolts to ensure the horizontal alignment of the centerline, thus guaranteeing the straightness of the cast steel pipes and preventing bending deformation. If changes in the cast steel pipe specifications cause variations in the centerline position of the pipe mold, the positions of the idler rollers and guide rollers can be adjusted by adjusting the adjusting bolts on the positioning frame and the set bolts on the groove block; the adjustment is simple and convenient.

Claims

1. A thin-walled cast steel pipe support bracket, characterized in that: It includes a fixed leg, a hydraulic cylinder, a pipe frame, a roller, and a guide roller; the pipe frame is a steel structure frame welded from longitudinal beams and transverse beams, the guide roller is installed on the transverse beam, the support for fixing the roller is installed on the longitudinal beam, and the hinge connector is fixed on the outer side of the longitudinal beam; the fixed leg and the hydraulic cylinder are respectively set on the rail side and the guide side of the pipe frame, and are both connected to the pipe frame through the hinge connector.

2. The thin-walled cast steel pipe support according to claim 1, characterized in that: The lower end of the hydraulic cylinder is fixed, and the connecting shaft of the upper hinge connector of the hydraulic cylinder is clearance-fitted with the upper and lower hinge holes.

3. The thin-walled cast steel pipe support according to claim 1, characterized in that: The lower end of the hydraulic cylinder is hinged for positioning.

4. A thin-walled cast steel pipe support according to claim 1, characterized in that: The end of the guide rail is located above the pipe frame, and the upper plane of the guide rail does not exceed the upper edge of the idler roller.

5. A thin-walled cast steel pipe support according to claim 1, characterized in that: The shaft of the guide roller is fixed on the groove block, and the groove inside the groove block corresponds to the shape and size of the crossbeam. The bottom of the groove block is fixed to the crossbeam with set bolts.

6. A thin-walled cast steel pipe support according to claim 1, characterized in that: The idler roller is positioned by inserting a limiting bar into the hole in the idler roller shaft at both ends of the idler roller shaft.

7. A thin-walled cast steel pipe support according to claim 1, characterized in that: The pipe end of the pipe frame is equipped with guide rollers and idler rollers.

8. A thin-walled cast steel pipe support according to claim 1, characterized in that: When the hydraulic cylinder returns to its original position, the connecting pipe frame is limited by the positioning frame.

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