Replacing tool for corrugated expander of steam pipeline

Abstract

The replacement tool comprises a fixing plate, a limiting rod and a belt fastener, the fixing plate is connected with a connecting plate and a side lug plate in a welded mode, and the left side of the fixing plate is provided with a side anti-skid pad of the same structure as a semicircular ring. A bottom non-slip mat with a structure which is thinner in the middle and gradually thickens and extends towards two sides is adhered to the bottom surface of the semicircular ring; the limiting rod is triangularly arranged by three cylindrical rods which are fixedly connected by an L-shaped plate, threaded rods are arranged at the two ends of the limiting rod, and butterfly nuts are arranged for locking; the belt fastener is arranged on the lower portion of the fixing plate and used for longitudinally fixing the fixing plate. The replacement tool transfers the axial tension applied to the steam pipelines at the two ends under the cooling state of the corrugated expander and applies the axial tension to the steam pipelines at the two ends, so that the positions of the steam pipelines at the two ends are fixed, displacement changes generated by the steam pipelines at the two ends after the corrugated expander is disassembled are eliminated, and convenience is provided for follow-up installation of a new corrugated expander. And the manpower and material resource cost generated by replacing a large amount of the corrugated expander is saved, and the labor intensity in the replacing process is reduced.

Description

Technical Field

[0001] The utility model relates to the field of pipeline expander pipe fitting maintenance equipment, in particular to a replacement tool for a corrugated expander of a steam pipeline. Background Technique

[0002] As is well known, when the medium temperature in the steam pipeline changes, the pipeline will expand and contract with the change of the medium temperature, thus causing certain damage to the pipeline. In order to reduce the damage to the pipeline caused by thermal expansion and contraction, expanders are usually installed in the pipeline system. The expander effectively compensates for the axial and transverse deformation of the pipeline through its special structural design. In the scenario of normal pressure or low pressure, the corrugated expander is most widely used.

[0003] Due to the fact that the temperature of the medium inside the steam pipeline changes at any time, the corrugated expander is in a telescopic motion state caused by the thermal expansion and contraction of the pipeline for a long time. Therefore, the corrugated expander is prone to fatigue damage, resulting in relatively frequent replacement. At present, there are defects in replacing the corrugated expander, and these defects are as follows:

[0004] First, the replacement of the corrugated expander can only be carried out when the pipeline is in a cooled state. At this time, the corrugated expander is in a contracted state, generating a relative axial tension on the pipelines connected to its two ends. When the corrugated expander is removed, the axial tension disappears, and the pipelines at both ends will rebound and reset, resulting in a relatively large displacement change, which will pose a certain safety hazard to the on-site workers and also cause damage to the pipeline.

[0005] Second, when installing a new corrugated expander, there is a relatively large distance between the pipeline and the new corrugated expander. At this time, a manual electric hoist needs to be used to pull the pipeline to the position before the rebound and reset. During this process, the tension applied by the electric hoist to the pipeline changes in real time, which will cause unnecessary wear to the pipeline. In addition, it is difficult to ensure the accurate connection between the pipeline and the new corrugated expander, and it takes several manual adjustments to complete the docking of the pipeline flange and the new corrugated expander flange, consuming a large amount of labor and time costs.

[0006] Therefore, it is the key to develop a replacement tool for the corrugated expander with simple structure, strong practicability and convenient and fast operation to solve the above technical problems. Summary of the Invention

[0007] In order to solve the many problems existing in the above background technique, a replacement tool for a corrugated expander of a steam pipeline of the present utility model is realized by adopting the following design structure and the following technical solutions:

[0008] As a replacement tool for a corrugated expander of a steam pipeline of the present utility model, it includes:

[0009] Fixing plate, the fixing plate is a semi-circular ring structure with a through hole, and is used for snap-fitting on a steam pipe;

[0010] Limit rod, threaded rods with a certain length are provided at both ends of the limit rod, and are used for horizontally connecting and fixing the fixing plate;

[0011] Belt fastener, the belt fastener is connected to the bottom surface of the circular ring of the fixing plate, and is used for longitudinally fixing the fixing plate.

[0012] Further, the fixing plate includes:

[0013] Connecting plate, the connecting plate is a rectangular plate with rounded corners, and is fixedly welded on the top surface of the semi-circular ring of the fixing plate. There is a through hole on the connecting plate;

[0014] Side ear plates, the side ear plates are symmetrically welded on the top surface of the circular ring of the fixing plate on the left and right. There are through holes on the side ear plates;

[0015] Side anti-slip pad, the side anti-slip pad has the same semi-circular ring structure as the fixing plate, and is attached to the side surface of the fixing plate;

[0016] Bottom anti-slip pad, the bottom anti-slip pad is pasted on the bottom surface of the semi-circular ring of the fixing plate.

[0017] Further, the side anti-slip pad and the bottom anti-slip pad include: both the side anti-slip pad and the bottom anti-slip pad are made of elastomer material. Among them, the bottom anti-slip pad is a structure with a thinner middle and gradually thickening and extending towards both sides, and can be applicable to pipes of different sizes.

[0018] Further, the fixing plate includes: a U-shaped connecting piece is provided on the bottom surface of the circular ring of the fixing plate, and the U-shaped connecting piece is only provided on one side of the fixing plate.

[0019] Further, the limit rod includes: the limit rod is arranged in a triangle by three cylindrical rods, and there are multiple L-shaped plates in the middle for fixed connection.

[0020] Further, the limit rod includes: a locking nut and a wing nut. The locking nut only exists on the threaded rods at both ends of the middle cylindrical rod of the limit rod, and is used for locking the fixing plate after the fixing plate is adjusted in place; the wing nuts are distributed at the ends of the three cylindrical rods of the limit rod, and are used for adjusting the position of the fixing plate.

[0021] Further, the locking nut and the wing nut include: the locking nut is placed inside the middle cylindrical rod of the connecting plate, and the wing nut is placed outside the connecting plate and is threadedly connected to the limit rod.

[0022] Further, the belt fastener includes: a belt, and an anti-slip layer is pasted on the inner surface of the belt, and the anti-slip layer is used for contacting with the steam pipe,

[0023] Further stabilize the fixing plate; a belt buckle, which is welded and fixed on the bottom surface of the circular ring of the fixing plate, and the belt buckle is provided with a manually rotatable adjustment button.

[0024] Furthermore, the belt fastener includes: the belt fastener is placed on the left side at the bottom of the fixing plate. Among them, one end of the belt is sleeved on the U-shaped connecting piece in a circular ring shape, and the other end of the belt passes through the belt buckle and is locked and fixed by the belt buckle.

[0025] The working principle of the present utility model: When using a replacement tool for a steam pipeline corrugated expander of the present utility model, first, sleeved the fixing plate on the threaded rod positions at the left and right ends of the limiting rod, close to the locking nut in the middle rod of the limiting rod but not tightened. A wing nut is sleeved on the threaded rod outside the fixing plate. Then, snap and fasten the replacement tool on the steam pipelines connected to the left and right ends of the corrugated expander, at a position far from the flange.

[0026] Immediately afterwards, use a bolt disassembly tool to remove the upper half of the flange fixing bolts at both ends of the corrugated expander. Then, slide and adjust the fixing plate so that the side with the anti-slip pad of the fixing plate fits against the end face of the left pipeline flange. Turn the wing nut to squeeze the fixing plate so that the fixing plate fits tightly against the left steam pipeline flange. Use the same steps for the right fixing plate so that the fixing plate fits tightly against the right steam pipeline flange. Use a tool to tighten the locking nut to further lock and fix the positions of the left and right fixing plates. Then, manually pull the belt through the belt buckle so that the belt fits tightly against the pipeline, and rotate the button to lock the belt.

[0027] Finally, use a disassembly tool to remove all the remaining bolts of the flange fixing bolts at both ends of the corrugated expander, and then the corrugated expander can be removed. To install a new corrugated expander, first install the lower half of the flange fixing bolts. Open the belt buckle, loosen the wing nut, remove the replacement tool, and finally complete the installation of the upper half of the remaining flange fixing bolts, and then the replacement and installation of the new corrugated expander can be completed.

[0028] The beneficial effects of the present utility model compared with the prior art are:

[0029] 1. For the corrugated expander replacement tool involved in the present utility model, during the use process, the replacement tool is stably positioned directly above the corrugated expander, converting the axial tension exerted by the corrugated expander on the steam pipelines connected at both ends in the cooled state into the tension exerted by the replacement tool, thereby fixing the positions of the steam pipelines at both ends, eliminating the displacement changes of the steam pipelines at both ends after removing the corrugated expander, avoiding the wear of the pipeline wall caused by multiple deformations of the steam pipeline, and also providing convenience for the subsequent installation of a new corrugated expander, saving a large amount of labor and material costs generated by replacing the corrugated expander and reducing the labor intensity during the replacement process.

[0030] 2. The utility model can be adjusted according to the contraction state length of different models of corrugated expansion joints. Therefore, within the adjustment range of the limit rod, it can be applied to the replacement of different models of corrugated expansion joints, with convenience and versatility. Moreover, the bottom anti-slip pad of the utility model is designed with a special structure that is thinner in the middle and gradually thickens and extends towards both sides. Facing steam pipes of different sizes used in combination with different models of corrugated expansion joints, it can maintain close contact with the pipes, ensuring the safety and reliability of the replacement tool and reducing potential safety hazards during use.

[0031] 3. The utility model is provided with a belt fastener, which is manually operated by workers. On the one hand, it ensures the stability of the replacement tool in the longitudinal direction, preventing safety problems such as easy detachment of the replacement tool due to excessive axial tension. On the other hand, the belt fastener is provided with an anti-slip layer, and the anti-slip layer is in close contact with the pipe, reducing accidental sliding of the replacement tool and providing additional stability. In addition, the belt fastener is completely manually operated by workers, which can remind the user to operate according to the normal steps, thereby reducing the possibility of misoperation or less operation and improving the safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The following further elaborates on the specific embodiments of the utility model in conjunction with the drawings, where:

[0033] Figure 1 is the overall structural schematic diagram of the corrugated expansion joint replacement tool of the utility model;

[0034] Figure 2 is the exploded structural schematic diagram of the corrugated expansion joint replacement tool of the utility model;

[0035] Figure 3 is the exploded structural schematic diagram of the fixing plate of the utility model;

[0036] Figure 4 is the exploded structural schematic diagram of the limit rod of the utility model;

[0037] Figure 5 is the exploded structural schematic diagram of the belt fastener of the utility model;

[0038] Figure 6 is the schematic diagram of the usage state of the corrugated expansion joint replacement tool of the utility model Figure 1 ;

[0039] Figure 7 is the schematic diagram of the usage state of the corrugated expansion joint replacement tool of the utility model Figure 2 ;

[0040] Figure 8 is the schematic diagram of the usage state of the corrugated expansion joint replacement tool of the utility model Figure 3 ;

[0041] Among them, the reference numerals in the figure are:

[0042] 1 - Fixed plate; 11 - Connecting plate; 12 - Side ear plate; 13 - Side anti-slip pad; 14 - Bottom anti-slip pad; 15 - U-shaped connecting piece;

[0043] 2 - Limiting rod; 21 - Threaded rod; 22 - L-shaped plate; 23 - Locking nut; 24 - Wing nut;

[0044] 3 - Belt fastener; 31 - Belt; 32 - Anti-slip layer; 33 - Belt buckle; 34 - Button;

[0045] 4 - Corrugated expander;

[0046] 5 - Left pipeline;

[0047] 6 - Right pipeline;

[0048] 7 - Flange fastening bolt. Specific implementation manner

[0049] In order to make the technical means, creative features, achieved purposes and effects realized by the present utility model easy to understand, the technical solutions of the present utility model will be further described in detail below in conjunction with the attached drawings and specific implementation manners. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0050] As Figure 1 , Figure 2 shown, a replacement tool for a corrugated expander of a steam pipeline includes:

[0051] A fixed plate 1, the fixed plate 1 is a semi-circular ring structure with a through hole, and is used for snap-connecting to the steam pipeline;

[0052] A limiting rod 2, both ends of the limiting rod 2 are provided with threaded rods 21 of a certain length, and are used for horizontally connecting and fixing the fixed plate 1. The threaded rod 21 at the end of the limiting rod 2 passes through the fixed plate 1, and the fixed plate 1 can slide freely;

[0053] A belt fastener 3, the belt fastener 3 is connected to the bottom surface of the ring of the fixed plate 1, and is used for vertically fixing the fixed plate 1.

[0054] In the present utility model, the left fixed plate 1 contacts the flange end face of the left pipeline 5, and the right fixed plate 1 contacts the flange end face of the right pipeline 6. The limiting rod 2 connects the left and right fixed plates 1 into a whole, so that the positions of the left and right fixed plates 1 in the horizontal direction are kept stable, thereby fixing the relative positions of the left pipeline 5 and the right pipeline 6. The belt fastener 3 buckles the fixed plate 1 on the steam pipeline to keep the fixed plate 1 stable in the vertical direction.

[0055] Specifically, as Figure 3 shown, the fixing plate 1 includes:

[0056] A connecting plate 11, the connecting plate 11 is a rectangular plate with rounded corners, fixedly welded on the top surface of the semi-circular ring of the fixing plate 1, and a through hole is provided on the connecting plate 11 for passing through the middle rod of the limiting rod 2;

[0057] Side ear plates 12, the side ear plates 12 are symmetrically welded on the top surface of the circular ring of the fixing plate 1, and through holes are provided on the side ear plates 12 for passing through the side rods of the limiting rod 2;

[0058] Side anti-slip pads 13, the side anti-slip pads 13 have the same semi-circular ring structure as the fixing plate 1 and are attached to the side surface of the fixing plate 1;

[0059] Bottom anti-slip pads 14, the bottom anti-slip pads 14 are adhesively attached to the bottom surface of the semi-circular ring of the fixing plate 1.

[0060] In the present utility model, both the side anti-slip pads 13 and the bottom anti-slip pads 14 are made of elastomer material, which can prevent the replacement tool from directly contacting the steam pipeline and causing wear to the pipeline surface. The contact between the elastomer and the steam pipeline can increase the friction between them and further stabilize the replacement tool.

[0061] In the present utility model, the bottom anti-slip pad 14 has a structure with a thinner middle and gradually thickening towards both sides. The side wall of the steam pipeline squeezes the bottom anti-slip pad 14, generating a large frictional force between the two and further stabilizing the replacement tool.

[0062] Specifically, as Figure 4 shown, the limiting rod 2 includes: The limiting rod 2 is composed of three cylindrical rods arranged in a triangle, with multiple L-shaped plates 22 fixedly connected in the middle.

[0063] Specifically, as Figure 4 shown, the locking nuts 23 are only present on the end threaded rods 21 at both ends of the middle cylindrical rod of the limiting rod 2, and are used to lock the fixing plate 1 after the fixing plate 1 is adjusted in place; the wing nuts 24 are distributed at the ends of the three cylindrical rods of the limiting rod 2 and are used to adjust the position of the fixing plate 1.

[0064] In the present utility model, there is only one set of locking nuts 23, which is placed inside the middle cylindrical rod of the connecting plate 11. There are a total of three sets of wing nuts 24, which are used to adjust the position of the fixing plate 1. After the fixing plate 1 is in place, they are used to firmly lock the fixing plate 1.

[0065] Specifically, as Figure 5 shown, the belt fastener 3 includes:

[0066] A belt 31, with an anti-slip layer 32 pasted on the inner surface of the belt 31. The anti-slip layer 32 is used to contact the steam pipeline to further stabilize the fixing plate 1.

[0067] A belt buckle 33, which is welded and fixed on the bottom surface of the ring of the fixing plate 1. The belt buckle 33 is provided with a manually rotatable adjustment button 34.

[0068] In the present utility model, the belt fastener 3 is placed on the left side at the bottom of the fixing plate 1. Among them, one end of the belt 31 is sleeved on the U-shaped connecting piece 15, and the other end of the belt 31 passes through the belt buckle 33 and is locked and fixed by the belt buckle 33.

[0069] Specifically, as Figures 6 - 8 shown, the fixing plates 1 are symmetrically arranged on the left and right and sleeved on the threaded rod 21. The butterfly nut 24 is screwed on the outside of the fixing plate 1. Take the replacement tool to the corrugated expander 4 that needs to be replaced. Use the bolt disassembly tool to remove the upper half of the flange fastening bolt 7 connecting the left pipeline 5 flange and the right pipeline 6 flange to the corrugated expander 4 flange. Then, snap the left fixing plate 1 onto the left pipeline 5, and snap the right fixing plate 1 onto the right pipeline 6. Manually adjust so that the left and right fixing plates 1 are respectively attached to the flange end faces of the left pipeline 5 and the right pipeline 6. Tighten the butterfly nut 24 so that the fixing plate 1 is closely attached to the flange end face. Further, manually fit the belt 31 through the belt buckle 33 along the bottom surfaces of the left pipeline 5 and the right pipeline 6, rotate the button 34 to lock the belt 31. Then, use the bolt disassembly tool to remove the remaining flange fastening bolts 7, and take away the corrugated expander 4 from below, thus completing the disassembly work of the corrugated expander 4. Install a new corrugated expander 4, place the new corrugated expander 4 into the gap between the left pipeline 5 and the right pipeline 6 from below, use the bolt installation tool to complete the installation of the lower half of the flange fastening bolts 7. Then open the belt buckle 33, loosen the butterfly nut 24, and immediately take away the replacement tool, and complete the installation of the upper half of the flange fastening bolts 7, thus completing the installation work of the new corrugated expander 4.

[0070] Finally, it should be noted that the above has clearly and completely described the concept, specific structure and technical effects generated by the present utility model in combination with the embodiments and the drawings to fully understand the purpose, features and effects of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, other embodiments obtained by those skilled in the art without creative efforts all fall within the scope of protection of the present utility model. In addition, the connection relationships mentioned in the text do not refer only to the direct connection of components, but refer to the more optimal connection structure that can be formed by adding or reducing connection accessories according to the specific implementation situation. Each technical feature in the present utility model can be combined interactively without conflicting with each other.

Claims

1. A replacement tool for a steam pipeline corrugated expander, characterized in that, Comprising: A fixed plate (1), the fixed plate (1) being a semi-circular ring structure with through holes, for snap-fitting and buckling on a steam pipeline; A limiting rod (2), both ends of the limiting rod (2) being provided with threaded rods (21) of a certain length, for horizontally connecting and fixing the fixed plate (1); A belt fastener (3), the belt fastener (3) being connected to the bottom surface of the circular ring of the fixed plate (1), for longitudinally fixing the fixed plate (1).

2. The replacement tool for the steam pipeline corrugated expander according to claim 1, characterized in that, The fixed plate (1) includes: A connecting plate (11), the connecting plate (11) being a rectangular plate with rounded corners, fixedly welded to the top surface of the semi-circular ring of the fixed plate (1), and the connecting plate (11) being provided with through holes; Side ear plates (12), the side ear plates (12) being symmetrically welded to the top surface of the circular ring of the fixed plate (1) on the left and right, and the side ear plates (12) being provided with through holes; Side anti-slip pads (13), the side anti-slip pads (13) having the same semi-circular ring structure as the fixed plate (1), and being adhesively attached to the side surface of the fixed plate (1); Bottom anti-slip pads (14), the bottom anti-slip pads (14) being adhesively attached to the bottom surface of the semi-circular ring of the fixed plate (1).

3. The replacement tool for the steam pipeline corrugated expander according to claim 2, wherein The side anti-slip pads (13) and the bottom anti-slip pads (14) include: The side anti-slip pads (13) and the bottom anti-slip pads (14) are both made of an elastomer material. Among them, the bottom anti-slip pad (14) has a structure that is thinner in the middle and gradually thickens and extends towards both sides.

4. A replacement tool for a steam pipeline corrugated expander according to claim 2, characterized in that, The fixed plate (1) includes: A U-shaped connector (15) is provided on the bottom surface of the circular ring of the fixed plate (1), and the U-shaped connector (15) is only provided on one side of the fixed plate (1).

5. A replacement tool for a steam pipeline corrugated expander according to claim 1, characterized in that, The limiting rod (2) includes: The limiting rod (2) is composed of three cylindrical rods arranged in a triangle, and there are multiple L-shaped plates (22) fixedly connected in the middle.

6. The replacement tool for a steam pipeline corrugated expander according to claim 4, characterized in that, The limiting rod (2) includes: A locking nut (23) and a wing nut (24). The locking nut (23) only exists on the threaded rods (21) at both ends of the middle cylindrical rod of the limiting rod (2), and is used to lock the fixed plate (1) after the fixed plate (1) is adjusted in place; the wing nuts (24) are distributed at the ends of the three cylindrical rods of the limiting rod (2), and are used to adjust the position of the fixed plate (1).

7. A replacement tool for a steam pipe corrugated expander according to claim 6, characterized in that, The locking nut (23) and the wing nut (24) include: The locking nut (23) is placed inside the middle cylindrical rod of the connecting plate (11), and the wing nut (24) is placed outside the connecting plate (11) and is threadedly connected to the limiting rod (2).

8. A replacement tool for a steam pipe corrugated expander according to claim 1, characterized in that, The belt fastener (3) includes: A belt (31), an anti-slip layer (32) being adhesively attached to the inner surface of the belt (31), and the anti-slip layer (32) being used to contact the steam pipeline to further stabilize the fixed plate (1); A belt buckle (33), the belt buckle (33) being welded and fixed to the bottom surface of the circular ring of the fixed plate (1), and the belt buckle (33) being provided with a manually rotatable adjustment button (34).

9. A replacement tool for a steam pipeline corrugated expander according to claim 1 or claim 7, characterized in that, The belt fastener (3) includes: The belt fastener (3) is placed on the left side at the bottom of the fixed plate (1). Among them, one end of the belt (31) is sleeved on the U-shaped connector (15) in a circular shape, and the other end of the belt (31) passes through the belt buckle (33) and is locked and fixed by the belt buckle (33).

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