Flange expander
By designing a flange expander with a double-rotating structure and a wedge opening mechanism, the problem of weak stress and inability to adapt to small gaps in the front end teeth of the existing flange opener is solved, and the stable extension and efficient use of the expansion block are achieved.
Patent Information
- Application Number
- CN202420245477.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-31
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-01-31
AI Technical Summary
When used, the front end teeth are weak and easily damaged, and cannot adapt to the smaller flange gap, which increases the risk of operation.
A flange expander is designed, including a housing, connector, expansion block, screw rod and wedge block. Through the double-rotating structure and wedge opening mechanism, the expansion block can fit and extend into the flange gap to adapt to the smaller gap and avoid deformation caused by too far stress point.
The expansion block can effectively extend into the smaller flange gap, avoiding the problem of weak stress on the front end teeth, improving the stability and use efficiency of the equipment, and reducing the risk of damage.
Smart Images
Figure CN222553421U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of expanders, in particular to a flange expander. Background Art
[0002] At present, the disassembly and assembly of flanges of equipment in the oil refining and chemical industry, replacement of gaskets or addition of blind plates generally require the use of expanders to expand the flanges. The flange expanders sold on the market have the following main deficiencies when used: the gap between most flanges is 4 to 8 mm, and the thickness of the front end tooth tip of the expander on the market is mostly 6 mm / 8 mm, which cannot be used directly on many flanges; the expansion head is 160 mm long, and when used for flange expansion operations, only the front tip 10 to 30 mm is used, and the heavy rear section is basically only used for force transmission. This structural form determines that the front end teeth of the expander are relatively weak in force, and the front end teeth are easily damaged, bent and popped out during use, and the flange rebounds and collides, increasing the risk of operation. Utility Model Content
[0003] In order to solve the above technical problems, the utility model provides a flange expander, which provides better conditions for the expansion block to extend into the flange gap and can adapt to smaller flange gaps.
[0004] The technical solution of the utility model is: a flange expander, comprising a shell, two connecting parts, two expansion blocks, a screw rod and a wedge block, the upper end of the shell is provided with a sliding hole, the lower end is provided with a threaded hole, the sliding hole is communicated with the threaded hole, the wedge block is slidably connected to the sliding hole, the sliding hole is larger than the threaded hole, the wedge block can be abutted against the bottom of the sliding hole, the screw rod is rotatably connected to the threaded hole, one end of the screw rod can be abutted against the wedge block, the upper end of the shell is provided with two mounting platforms, the two mounting platforms are relatively arranged on both sides of the sliding hole, the two connecting parts are respectively hinged on the two mounting platforms, the two expansion blocks are respectively hinged on the two connecting parts, and the two connecting parts or the two expansion blocks can be abutted against both sides of the wedge block.
[0005] Furthermore, a step is provided on a side of the expansion block facing away from the wedge block.
[0006] Furthermore, a sliding groove is provided on a side of the expansion block facing the wedge block, and the sliding groove and the side surface of the expansion block form a smooth transition.
[0007] Furthermore, one end of the wedge block is a trapezoidal platform, and the trapezoidal platform can abut against the connecting piece or the expansion block.
[0008] Furthermore, the wedge block includes a wedge piece and a sliding block, the wedge piece is installed on the upper end of the sliding block, the wedge piece can abut against the connecting piece or the expansion block, and the sliding block is slidably connected to the sliding hole.
[0009] Furthermore, a side-opened T-shaped groove is provided at the upper end of the sliding block, and a T-shaped block is provided at the lower end of the wedge, and the T-shaped block is embedded in the T-shaped groove.
[0010] Furthermore, a grip handle is provided on the side of the shell.
[0011] Furthermore, a wrench position is provided on the side of the shell.
[0012] Furthermore, the cross-section of the wrench position is a regular hexagon.
[0013] Furthermore, the wrench position includes a first wrench position and a second wrench position, and the second wrench position is sunk in the first wrench position.
[0014] Furthermore, a rotating handle is provided at one end of the screw rod.
[0015] Furthermore, a connecting rod is provided at the lower end of the sliding block, a through hole is provided in the middle of the screw rod, and the connecting rod is slidably connected to the through hole.
[0016] Furthermore, a converter is provided at one end of the connecting rod.
[0017] Compared with the prior art, the advantages of the utility model are: a double rotating structure is formed between the expansion block, the connecting piece and the mounting platform, which ensures that the expansion block can be inserted into the flange gap after being fitted, provides better conditions for the expansion block to extend into the flange gap, can adapt to smaller flange gaps, and when the wedge opens the expansion block, the force point between the two is located at the upper end of the expansion block, avoiding deformation of the expansion block caused by the force point being too far from the top of the expansion block; single wrench, double wrench, hydraulic cylinder and other auxiliary measures can also be used in combination with the construction site to make the installation of this device more stable and more efficient. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0019] Figure 1 It is a schematic diagram of the structure of the utility model;
[0020] Figure 2 This is a schematic diagram of the structure of the expansion block of the utility model;
[0021] Figure 3 It is an exploded view of the sliding block and the wedge piece of the utility model;
[0022] Figure 4 It is a cross-sectional view of the shell of the utility model.
[0023] Among them: 1. expansion block; 101. step platform; 102. sliding groove; 2. connecting piece; 3. wedge; 301. T-shaped block; 4. shell; 401. sliding hole; 402. threaded hole; 5. mounting platform; 6. first wrench position; 7. second wrench position; 8. grip handle; 9. screw rod; 10. rotating handle; 11. connecting rod; 12. adapter; 13. sliding block; 1301, T-shaped slot. DETAILED DESCRIPTION
[0024] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.
[0025] like Figure 1-4 As shown, a flange expander includes a shell 4, two connecting members 2, two expansion blocks 1, a screw rod 9 and a wedge block. The upper end of the shell 4 is provided with a sliding hole 401, and the lower end is provided with a threaded hole 402. The sliding hole 401 is communicated with the threaded hole 402. The wedge block is slidably connected to the sliding hole 401. The sliding hole 401 is larger than the threaded hole 402. The wedge block can be pressed against the bottom of the sliding hole 401 to limit the wedge block. The screw rod 9 is rotatably connected to the threaded hole 402. One end of the screw rod 9 can be pressed against the wedge block. The screw rod 9 is rotated. The wedge block can be pushed out upwards, and two mounting platforms 5 are provided on the upper end of the shell 4. The two mounting platforms 5 are relatively arranged on both sides of the sliding hole 401. The two connecting members 2 are respectively hinged on the two mounting platforms 5, and the two expansion blocks 1 are respectively hinged on the two connecting members 2. The two mounting platforms 5, the two connecting members 2 and the two expansion blocks 1 form a symmetry. The two connecting members 2 or the two expansion blocks 1 can abut on both sides of the wedge block. When the wedge block moves upward under the push of the screw rod 9, the connecting members 2 and the expansion blocks 1 on both sides can be pushed away.
[0026] In the above embodiment, a stepped platform 101 is provided on the side of the expansion block 1 facing away from the wedge block, and different steps can be used according to the width of the construction position to obtain a tighter abutment and expansion effect; a sliding groove 102 is provided on the side of the expansion block 1 facing the wedge block, and the sliding groove 102 and the side of the expansion block 1 are in smooth transition. When the wedge block moves upward, it first extends into the sliding groove 102, and then slides upward along the sliding groove 102 until it returns to the side of the wedge block, thereby avoiding the situation where the wedge block is stuck by one end of the expansion block 1 when it moves upward; one end of the wedge block is a trapezoidal platform, which can abut against the connecting piece 2 or the expansion block 1, and the upper end area of the trapezoidal platform is The wedge block 13 is small and easier to open the connecting piece 2 or the expansion block 1 against the two sides of the wedge block; the wedge block includes a wedge piece 3 and a sliding block 13, the wedge piece 3 is installed on the upper end of the sliding block 13, the wedge piece 3 can be abutted against the connecting piece 2 or the expansion block 1, and the sliding block 13 is slidably connected with the sliding hole 401, which reduces the difficulty of one-piece manufacturing and can also replace wedge pieces 3 of different thicknesses according to construction requirements, reducing the cost of repeated manufacturing and the area occupied when storing tools; the upper end of the sliding block 13 is provided with a side-opening T-slot 1301, and the lower end of the wedge piece 3 is provided with a T-block 301, the T-block 301 is embedded in the T-slot 1301, and then locked with screws for easy disassembly and assembly.
[0027] In the above embodiment, a grip handle 8 is provided on the side of the shell 4, which can be held and adjusted during construction; a wrench position is provided on the side of the shell 4, and the shell 4 can be fixed by a wrench before rotating the screw 9 to prevent the shell 4 from being offset and affecting the position of the expansion block 1; the cross-section of the wrench position is a regular hexagon, and the wrench can clamp the shell 4 from multiple directions; the wrench position includes a first wrench position 6 and a second wrench position 7, and the second wrench position 7 sinks in the first wrench position 6, so that two wrenches can be used to clamp the shell 4 from different directions to improve the stability when fixing the shell 4, and the wrench stuck in the second wrench position 7 can also prevent the shell 4 from axial position deviation and prevent the expansion block 1 from leaving the construction position; a rotating handle is provided at one end of the screw 9 to facilitate the rotation of the screw 9; a connecting rod 11 is provided at the lower end of the sliding block 13, and a through hole is provided in the middle of the screw 9, and the connecting rod 11 is slidably connected to the through hole, and the connecting rod 11 can be connected to the output end of the hydraulic cylinder. With the help of hydraulic construction, an adapter 12 is provided at one end of the connecting rod 11 to facilitate connection with the output end of the hydraulic cylinder.
[0028] Description of the working method of this utility model:
[0029] The device is held by the grip handle 8, and the sliding block 13 is pressed against the bottom of the sliding hole 401. The two expansion blocks 1 fit together and extend into the flange gap. At this time, the upper end of the wedge 3 is located in the sliding groove 102, and the middle part is pressed against the connecting piece 2. The handle is rotated to drive the screw rod 9 to move upward in the threaded hole 402, so that the sliding block 13 at its upper end is pushed out of the sliding hole 401, and finally the wedge 3 moves upward; during the upward movement of the wedge 3, the wedge 3 slides in the sliding groove 102 until it presses against the top of the triangle formed by the combination of the two sliding grooves 102, and the wedge 3 continues to move upward. When moving upward, the expansion block 1 drives the connecting piece 2 so that the expansion block 1 and the side of the connecting piece 2 facing the wedge 3 tend to the same plane. At this time, the two expansion blocks 1 are opened from the bottom, and the wedge 3 presses against the two expansion blocks 1 on both sides, so that the expansion block 1 is clamped by the flange and the wedge 3 to form a stable state; finally, it is necessary to apply a large force on the rotating handle so that the wedge 3 overcomes the resistance from the flange and continues to move upward. At this time, the wedge 3 gradually expands the expansion block 1. If a larger space needs to be expanded, different positions of the expansion block 1 on the stepped platform 101 are extended into the flange gap and the above steps are repeated. A double rotating structure is formed between the expansion block 1, the connecting piece 2 and the mounting platform 5 of the device, so as to ensure that the expansion block 1 can be inserted into the flange gap after being fitted, thereby providing better conditions for the expansion block 1 to be inserted into the flange gap and being adaptable to smaller flange gaps. When the wedge 3 props up the expansion block 1, the force point between the two is located at the upper end of the expansion block 1, thus avoiding deformation of the expansion block 1 caused by the force point being too far from the top of the expansion block 1. In addition, in order to ensure better use effect of the device, auxiliary measures such as single wrenches, double wrenches, hydraulic cylinders, etc. can be adopted in combination with the construction site to make the installation of the device more stable and more efficient.
[0030] The above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.
Claims
1. A flange expander, characterized in that: It includes a shell, two connecting parts, two expansion blocks, a screw rod and a wedge block. The upper end of the shell is provided with a sliding hole, and the lower end is provided with a threaded hole. The sliding hole is communicated with the threaded hole, the wedge block is slidably connected to the sliding hole, the sliding hole is larger than the threaded hole, the wedge block can be abutted against the bottom of the sliding hole, the screw rod is rotatably connected to the threaded hole, and one end of the screw rod can be abutted against the wedge block. Two mounting platforms are provided at the upper end of the shell, and the two mounting platforms are relatively arranged on both sides of the sliding hole. The two connecting parts are respectively hinged on the two mounting platforms, and the two expansion blocks are respectively hinged on the two connecting parts. The two connecting parts or the two expansion blocks can abut on both sides of the wedge block.
2. The flange expander according to claim 1, characterized in that: A step platform is provided on a side of the expansion block facing away from the wedge block.
3. The flange expander according to claim 1, characterized in that: A sliding groove is provided on one side of the expansion block facing the wedge block, and the sliding groove and the side surface of the expansion block form a smooth transition.
4. The flange expander according to claim 1, characterized in that: One end of the wedge block is a trapezoidal platform, and the trapezoidal platform can abut against the connecting piece or the expansion block.
5. The flange expander according to claim 1, characterized in that: The wedge block comprises a wedge piece and a sliding block. The wedge piece is installed on the upper end of the sliding block. The wedge piece can abut against the connecting piece or the expansion block. The sliding block is slidably connected with the sliding hole.
6. The flange expander according to claim 5, characterized in that: The upper end of the sliding block is provided with a side-opened T-shaped groove, and the lower end of the wedge is provided with a T-shaped block, which is embedded in the T-shaped groove.
7. The flange expander according to claim 5, characterized in that: A connecting rod is provided at the lower end of the sliding block, a through hole is provided in the middle of the screw rod, the connecting rod is slidably connected with the through hole, and an adapter is provided at one end of the connecting rod.
8. The flange expander according to claim 1, characterized in that: A grip handle is provided on the side of the shell.
9. The flange expander according to claim 1, characterized in that: A wrench position is provided on the side of the shell, the cross section of the wrench position is a regular hexagon, and the wrench position includes a first wrench position and a second wrench position, and the second wrench position is sunken in the first wrench position.
10. The flange expander according to claim 1, characterized in that: A rotating handle is provided at one end of the screw rod.