Multi-degree-of-freedom adjustable auxiliary dismounting support

Abstract

The utility model discloses a multi-degree-of-freedom adjustable auxiliary dismounting support, and relates to the technical field of steam turbine large component overhaul and maintenance tools, the multi-degree-of-freedom adjustable auxiliary dismounting support comprises a thread tightening structure, a left-hand pull rod, a right-hand pull rod, a first supporting block and a second supporting block, one end of the thread tightening structure is provided with a left-hand threaded hole, and the other end of the thread tightening structure is provided with a right-hand threaded hole; one end of the left-hand pull rod is matched with the left-hand threaded hole, and the other end is connected with the first supporting block; one end of the right-handed pull rod is matched with the right-handed threaded hole, and the other end is connected with the second supporting block. The device is reasonable in design, the first supporting block and the second supporting block can be welded to a main body structure connected with two flanges needing to be separated, so that the two flange faces can be tensioned by rotating the thread tightening structure in the forward direction, and the two flange faces can be ejected by rotating the thread tightening structure in the reverse direction. The disassembling support can be used for disassembling, separating or installing and connecting two flange faces in the vertical direction or the horizontal direction, and can also be used for flange faces with inclined angles, and multi-degree-of-freedom operation is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of steam turbine large component overhaul and maintenance tools, and more specifically to the technical field of multi-degree-of-freedom adjustable auxiliary disassembly brackets. Background Art

[0002] The joint end faces between large components in the steam turbine are prone to adhesion under long-term high temperature and high pressure operation, making it difficult to effectively separate the flange joint surfaces between components, increasing the difficulty and time consumption of maintenance. In addition, the presence of the adhesion layer will cause the joint surface to be subjected to additional mechanical stress during the disassembly process, which will damage the finish of the joint surface and cause the secondary installation to deteriorate the sealing performance. This problem not only affects the reliability of the steam turbine, but also increases the maintenance cost and cycle. Utility Model Content

[0003] The purpose of the utility model is to solve the above technical problems and provide a multi-degree-of-freedom adjustable auxiliary disassembly bracket for effectively locating and separating the mating end faces of the connection between components. The structure can be used for disassembly and maintenance of most sleeve flange connections of various types of steam turbines, and has the advantages of simple structure and convenient use.

[0004] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0005] The utility model provides a multi-degree-of-freedom adjustable auxiliary disassembly bracket, comprising a tightening wire structure, a left-handed pull rod, a right-handed pull rod, a first support block and a second support block, wherein a left-handed threaded hole is arranged at one end of the tightening wire structure, and a right-handed threaded hole is arranged at the other end;

[0006] One end of the left-hand pull rod is matched with the left-hand threaded hole, and the other end is connected to the first support block;

[0007] One end of the right-hand pull rod is matched with the right-hand threaded hole, and the other end is connected to the second support block;

[0008] Specifically, during operation, the first support block and the second support block can be welded to the main structure connected by two flanges to be separated (such as Figure 1 , located on component one and component two). The threads of the left-hand pull rod and the right-hand pull rod are left-handed and right-handed respectively, one end of the tightening wire structure is a left-handed threaded hole, and the other end is a right-handed threaded hole, so that the tightening wire structure can tighten the two flange surfaces by rotating forward, and the tightening wire structure can push open the two flange surfaces by rotating reversely.

[0009] The disassembly bracket can be used for disassembly and separation or installation and connection of two flange surfaces in a vertical direction or a horizontal direction, and can also be used for flange surfaces at an inclined angle to achieve multi-degree-of-freedom operation.

[0010] In one embodiment, a left-handed threaded hole is provided on the first support block, and the first support block is fastened to the left-handed pull rod through a left-handed nut; a right-handed threaded hole is provided on the second support block, and the second support block is fastened to the right-handed pull rod through a right-handed nut.

[0011] In one embodiment, the tightening wire structure is a tubular member with a central opening, and the center line of the tightening wire structure, the axis of the left-handed pull rod, and the axis of the right-handed pull rod are collinear.

[0012] In one embodiment, the middle part of the left-handed pull rod is a polished rod, both ends of the left-handed pull rod are provided with left-handed threads, and the outer wall of the polished rod is uniformly provided with a plurality of anti-slip chip surfaces along the circumferential direction.

[0013] In one embodiment, the middle part of the right-handed pull rod is a polished rod, both ends of the right-handed pull rod are provided with right-handed threads, and the outer wall of the polished rod is uniformly provided with a plurality of anti-slip chip surfaces along the circumferential direction.

[0014] In one embodiment, four anti-slip chip surfaces are evenly distributed on the outer wall of the polished rod along the circumferential direction.

[0015] In one embodiment, the wire tightening structure includes a central cylinder and cones symmetrically arranged at both ends of the cylinder, the large end surface of each cone is in contact with the cylinder, the diameter of the large end surface of each cone is the same as the diameter of the cylinder, and the cylinder and the two cones are integrally formed.

[0016] In one embodiment, the axis of the cylinder coincides with the axes of the two cones on either side.

[0017] In one embodiment, the left-handed threaded hole and the right-handed threaded hole are respectively axially arranged in two cones, and an intermediate through hole connecting the left-handed threaded hole and the right-handed threaded hole is arranged in the cylinder, and the axes of the left-handed threaded hole, the right-handed threaded hole and the intermediate through hole coincide.

[0018] In one embodiment, the tightening wire structure is symmetrically provided with two anti-slip cut surfaces along the axial direction.

[0019] Working principle: When using and installing, the first support block and the second support block can be welded to the main structure of the two flange connections to be separated in advance (such as Figure 1, located on component one and component two), and then respectively assemble the left / right-hand pull rod with the threads at both ends of the tightening structure, so that the end faces of the pull rods on both sides fit to the center of the tightening structure; install the corresponding rotation direction nut (left-hand nut / right-hand nut) on the other end of the left / right-hand pull rod. During installation, place the pre-assembled structure between two support blocks (the first support block and the first support block), and by rotating the left / right-hand pull rod, the left / right-hand pull rod gradually extends and screws into the preset screw hole of the corresponding support block (the first support block / the second support block), and use the tightening nut (left-hand nut / right-hand nut) to tighten the corresponding pull rod (left-hand pull rod / right-hand pull rod) and the corresponding support block (the first support block / the first support block), and the bracket installation is completed.

[0020] During the assembly process of components, by rotating the tightening wire structure in the reverse direction along the thread, the distance between the two components (component one and component two) is shortened, so that the two connecting end faces (flange faces) are gradually aligned and fit together. During maintenance, the adhesion of the two connecting end faces (flange faces) reduces the separation efficiency between the two components (component one and component two). By rotating the tightening wire structure in the forward direction along the thread, the two pull rods (left-handed pull rod / right-handed pull rod) extend outward and apply a reverse force to the two components (component one and component two), and the two connecting end faces (flange faces) of the two components (component one and component two) gradually disengage, and other load-bearing and disassembly devices are subsequently used to remove the components. In short, this structure controls the spacing between components through the coordinated action of the left-handed thread and the right-handed thread, and completes the effective control of positioning and separation during the installation and disassembly process between components.

[0021] The beneficial effects of the utility model are as follows:

[0022] 1. This structure controls the spacing between components through the synergistic effect of left-handed threads and right-handed threads, and effectively controls the positioning and separation during the installation and disassembly process between components.

[0023] 2. The disassembly bracket can be used for disassembly and separation or installation and connection of two flange surfaces in the vertical direction or horizontal direction, and can also be used for flange surfaces at inclined angles to achieve multi-degree-of-freedom operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the utility model;

[0025] Figure 2 It is a schematic diagram of a left-hand tie rod or a right-hand tie rod;

[0026] Figure 3 It is a structural schematic diagram of a tight wire structure;

[0027] Figure numerals: 1-tightening structure, 2-left-hand pull rod, 3-right-hand pull rod, 4-left-hand nut, 5-right-hand nut, 6-first support block, 7-second support block. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0031] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] Example 1

[0033] like Figures 1 to 3 As shown, this embodiment provides a multi-degree-of-freedom adjustable auxiliary disassembly bracket, including a tightening wire structure 1, a left-handed pull rod 2, a right-handed pull rod 3, a first support block 6 and a second support block 7. One end of the tightening wire structure 1 is provided with a left-handed threaded hole, and the other end is provided with a right-handed threaded hole;

[0034] One end of the left-handed pull rod 2 is matched with the left-handed threaded hole, and the other end is connected to the first support block 6;

[0035] One end of the right-hand pull rod 3 is matched with the right-hand threaded hole, and the other end is connected to the second support block 7;

[0036] Specifically, during operation, the first support block 6 and the second support block 7 can be welded to the main structure of the two flange connections to be separated (such as Figure 1 , located on component 1 and component 2). The threads of the left-hand pull rod 2 and the right-hand pull rod 3 are left-handed and right-handed respectively, one end of the tightening wire structure 1 is a left-handed threaded hole, and the other end is a right-handed threaded hole, so that the tightening wire structure 1 can tighten the two flange surfaces by rotating forward, and the two flange surfaces can be pushed open by rotating reversely.

[0037] In addition, the disassembly bracket can be used for disassembly and separation or installation and connection of two flange surfaces in the vertical direction or the horizontal direction, and can also be used for flange surfaces at inclined angles to achieve multi-degree-of-freedom operation.

[0038] Example 2

[0039] like Figures 1 to 3 As shown, this embodiment provides a multi-degree-of-freedom adjustable auxiliary disassembly bracket, including a tightening wire structure 1, a left-handed pull rod 2, a right-handed pull rod 3, a first support block 6 and a second support block 7. One end of the tightening wire structure 1 is provided with a left-handed threaded hole, and the other end is provided with a right-handed threaded hole;

[0040] One end of the left-handed pull rod 2 is matched with the left-handed threaded hole, and the other end is connected to the first support block 6;

[0041] One end of the right-hand pull rod 3 is matched with the right-hand threaded hole, and the other end is connected to the second support block 7;

[0042] The first support block 6 is provided with a left-hand threaded hole, and the first support block 6 is fastened to the left-hand pull rod 2 through a left-hand nut 4; the second support block 7 is provided with a right-hand threaded hole, and the second support block 7 is fastened to the right-hand pull rod 3 through a right-hand nut 5.

[0043] The tightening wire structure 1 is a tubular member having a central hole, and the center line of the tightening wire structure 1, the axis line of the left-handed pull rod 2, and the axis line of the right-handed pull rod 3 are collinear.

[0044] The middle part of the left-handed pull rod 2 is a polished rod, both ends of the left-handed pull rod 2 are provided with left-handed threads, and the outer wall of the polished rod is evenly distributed along the circumference with a plurality of anti-slip chip surfaces.

[0045] The middle part of the right-hand pull rod 3 is a polished rod, both ends of the right-hand pull rod 3 are provided with right-hand threads, and the outer wall of the polished rod is evenly distributed along the circumferential direction with a plurality of anti-slip chip surfaces.

[0046] The outer wall of the polished rod is evenly distributed with four anti-slip chip surfaces along the circumferential direction.

[0047] Example 3

[0048] This embodiment is further optimized on the basis of embodiment 2, specifically:

[0049] The wire tightening structure 1 includes a central cylinder and cones symmetrically arranged at both ends of the cylinder. The large end surface of each cone is in contact with the cylinder. The diameter of the large end surface of each cone is the same as the diameter of the cylinder. The cylinder and the two cones are integrally formed.

[0050] The axis of the cylinder coincides with the axes of the two cones on either side.

[0051] The left-handed threaded hole and the right-handed threaded hole are respectively axially arranged in two cones, and an intermediate through hole connecting the left-handed threaded hole and the right-handed threaded hole is arranged in the cylinder, and the axes of the left-handed threaded hole, the right-handed threaded hole and the intermediate through hole coincide.

[0052] The tightening wire structure 1 is symmetrically provided with two anti-slip cut surfaces along the axial direction.

[0053] Working principle: When using and installing, the first support block 6 and the first support block 6 can be welded to the main structure of the two flange connections to be separated in advance (such as Figure 1 , located on component one and component two), and then respectively thread the left / right-hand pull rod 3 with the two ends of the tightening structure 1, so that the end faces of the pull rods on both sides fit to the center of the tightening structure 1; the other end of the left / right-hand pull rod 3 is installed with the corresponding rotation direction nut (left-hand nut 4 / right-hand nut 5). During installation, place the pre-assembled structure between two support blocks (first support block 6 and first support block 6), and by rotating the left / right-hand pull rod 3, the left / right-hand pull rod 3 is gradually extended and screwed into the preset screw hole of the corresponding support block (first support block 6 / second support block 7), and use the tightening nut (left-hand nut 4 / right-hand nut 5) to tighten the corresponding pull rod (left-hand pull rod 2 / right-hand pull rod 3) and the corresponding support block (first support block 6 / first support block 6), and the bracket installation is completed.

[0054] During the assembly process of components, by rotating the tightening structure 1 in the reverse direction along the thread, the distance between the two components (component one and component two) is shortened, so that the two connecting end faces (flange faces) are gradually aligned and fit together. During maintenance, the adhesion of the two connecting end faces (flange faces) reduces the separation efficiency between the two components (component one and component two). By rotating the tightening structure 1 in the forward direction along the thread, the two pull rods (left-handed pull rod 2 / right-handed pull rod 3) extend outward and apply a reverse force to the two components (component one and component two), and the two connecting end faces (flange faces) of the two components (component one and component two) gradually disengage, and other load-bearing and disassembly devices are subsequently used to remove the components. In short, this structure achieves the control of the spacing between components through the coordinated action of the left-handed thread and the right-handed thread, and completes the effective control of the positioning and separation during the installation and disassembly process between components.

Claims

1. A multi-degree-of-freedom adjustable auxiliary disassembly bracket, characterized in that: It comprises a tightening wire structure (1), a left-handed pull rod (2), a right-handed pull rod (3), a first support block (6) and a second support block (7); one end of the tightening wire structure (1) is provided with a left-handed threaded hole, and the other end is provided with a right-handed threaded hole; one end of the left-handed pull rod (2) cooperates with the left-handed threaded hole, and the other end is connected to the first support block (6); one end of the right-handed pull rod (3) cooperates with the right-handed threaded hole, and the other end is connected to the second support block (7).

2. The multi-degree-of-freedom adjustable auxiliary disassembly bracket according to claim 1, characterized in that: The first support block (6) is provided with a left-hand threaded hole, and the first support block (6) is fastened to the left-hand pull rod (2) through a left-hand nut (4); the second support block (7) is provided with a right-hand threaded hole, and the second support block (7) is fastened to the right-hand pull rod (3) through a right-hand nut (5).

3. The multi-degree-of-freedom adjustable auxiliary disassembly bracket according to claim 1, characterized in that: The tightening wire structure (1) is a tubular member with a central opening, and the center line of the tightening wire structure (1), the axis of the left-handed pull rod (2), and the axis of the right-handed pull rod (3) are all collinear.

4. The multi-degree-of-freedom adjustable auxiliary disassembly bracket according to claim 1, characterized in that: The middle part of the left-handed pull rod (2) is a polished rod, both ends of the left-handed pull rod (2) are provided with left-handed threads, and the outer wall of the polished rod is evenly distributed along the circumference with a plurality of anti-slip chip surfaces.

5. The multi-degree-of-freedom adjustable auxiliary disassembly bracket according to claim 1, characterized in that: The middle part of the right-handed pull rod (3) is a polished rod, both ends of the right-handed pull rod (3) are provided with right-handed threads, and the outer wall of the polished rod is evenly distributed along the circumferential direction with a plurality of anti-slip chip surfaces.

6. A multi-degree-of-freedom adjustable auxiliary disassembly bracket according to claim 4 or 5, characterized in that: The outer wall of the polished rod is evenly distributed with four anti-slip chip surfaces along the circumferential direction.

7. The multi-degree-of-freedom adjustable auxiliary disassembly bracket according to claim 1, characterized in that: The wire tightening structure (1) comprises a central cylinder and cones symmetrically arranged at both ends of the cylinder, the large end surface of each cone is in contact with the cylinder, the diameter of the large end surface of each cone is the same as the diameter of the cylinder, and the cylinder and the two cones are integrally formed.

8. The multi-degree-of-freedom adjustable auxiliary disassembly bracket according to claim 7, characterized in that: The axis of the cylinder coincides with the axes of the two cones on both sides.

9. The multi-degree-of-freedom adjustable auxiliary disassembly bracket according to claim 8, characterized in that: The left-handed threaded hole and the right-handed threaded hole are respectively axially arranged in the two cones, and an intermediate through hole connecting the left-handed threaded hole and the right-handed threaded hole is arranged in the cylinder, and the axes of the left-handed threaded hole, the right-handed threaded hole and the intermediate through hole coincide.

10. The multi-degree-of-freedom adjustable auxiliary disassembly bracket according to claim 7, characterized in that: The wire tightening structure (1) is symmetrically provided with two anti-slip cut surfaces along the axial direction.

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