Auxiliary tool for roundness adjustment of a pipe

Abstract

The utility model discloses an auxiliary tool for pipe roundness adjustment, including support and adjusting mechanism, the support is annular, when using, the support ring cover setting is in the preset pipe outer wall, the adjusting mechanism includes the adjusting spare of the through support periphery, the inboard end of adjusting spare is provided with the compression assembly, the compression assembly includes the ball seat of being limited in the adjusting spare through the elastic part I and the ball that is arranged in the ball seat and rolls, the elastic part I has elasticity, the ball is located with the opposite side of elastic part I, and the ball has the pressure end of protruding the ball seat, the displacement of adjusting spare is driven and is locked along the direction of the through support of adjusting spare, and the pressure end of ball is formed elastic contact with the pipe outer wall through the elastic part I, the adjusting mechanism includes several groups of the uniform distribution in the support periphery, can make the pipe roundness adjustment efficiency promotion, and then promote construction progress.

Description

Technical Field

[0001] This utility model relates to the field of pipe fitting roundness adjustment, and specifically to an auxiliary tool for adjusting the roundness of pipe fittings. Background Technology

[0002] In existing technologies, the roundness maintenance or adjustment of pipe components mostly relies on internal support structures of the strut type. However, due to the presence of the interlayer in double-layer cylindrical structures, the roundness of the pipe components cannot be guaranteed by the support method. When the longitudinal or circumferential seams of the pipes are joined, the current roundness maintenance method relies solely on external force cable tensioning to adjust the roundness of the pipe components. Due to the limitations of the construction site and environment, the plate is usually rolled into a circle and then manually tensioned by pulling the cable or using cable reel equipment to adjust the roundness. Cable reel equipment is difficult to control in terms of force application, so it is only used for thick-walled pipe components. For thin-walled pipe components, manual labor is still the main method. Then, the longitudinal or circumferential seams of the pipes are joined by spot welding or other methods. After welding, the roundness of the pipe components is corrected again by hammering, roundness checkers, or heat correction to meet the preset requirements. This operation method has the problem of slow construction progress.

[0003] Therefore, to solve the above problems, an auxiliary tool is needed for adjusting the roundness of pipe fittings, which can improve the efficiency of pipe fitting roundness adjustment and thus improve the construction progress. Utility Model Content

[0004] In view of this, the purpose of this utility model is to overcome the defects in the prior art and provide an auxiliary tool for adjusting the roundness of pipe fittings, which can improve the efficiency of pipe fitting roundness adjustment and thus improve the construction progress.

[0005] The auxiliary tool for adjusting the roundness of pipe fittings according to this utility model includes a bracket and an adjustment mechanism. The bracket is ring-shaped, and in use, the bracket ring is fitted onto the outer wall of the pipe fitting.

[0006] The adjustment mechanism includes an adjustment member that runs through the circumference of the support. A pressing assembly is provided on the inner end of the adjustment member. The pressing assembly includes a ball seat that is limited by an elastic element I and a ball that is rolled in the ball seat. The elastic element I is elastic. The ball is located on the side opposite to the elastic element I and has a pressure end that extends out of the ball seat.

[0007] The adjusting member is driven to move and locked along the direction of the adjusting member penetrating the bracket, and the pressure end of the ball is made to make elastic contact with the outer wall of the pipe through the elastic member I;

[0008] The adjustment mechanism comprises several groups evenly distributed around the circumference of the support.

[0009] Furthermore, the adjusting member has an adjusting cavity extending along its own length direction, and a stop block is provided at one end of the adjusting cavity. The ball seat is located in the adjusting cavity and is limited to the stop block by the elastic member I. The pressure end of the ball protrudes out of the adjusting cavity.

[0010] Furthermore, the clamping assembly also includes a plug disposed within the adjustment cavity, and the elastic element I is located within the adjustment cavity and is limited between the plug and the ball seat, and the elastic force of the elastic element I causes the plug and the ball seat to move away from each other.

[0011] Furthermore, the plug is driven to move and locked along the length of the adjustment cavity, so that the plug and the ball seat move closer or further apart.

[0012] Furthermore, the adjusting member has an operating end located outside the bracket, and an elastic element II is provided between the operating end and the bracket, the elastic element II having a preload force that moves the operating end away from the bracket.

[0013] Furthermore, the elastic element II is a spring sleeved on the adjusting element, and the bracket has an inner limiting groove that limits the inner end of the spring.

[0014] Furthermore, the adjusting component is a screw rod that passes through the bracket, and the bracket has a screw hole that is threadedly engaged with the screw rod;

[0015] The screw is equipped with a bearing connected to the operating end. The inner ring of the bearing is located inside the operating end and fixed to the screw, while the outer ring of the bearing is pressed against the operating end by a spring.

[0016] Furthermore, the outer ring of the bearing has an outer limiting groove that limits the outer end of the spring.

[0017] Furthermore, the adjusting cavity is coaxially formed on the screw, and the outer end of the adjusting cavity is provided with an internal thread. The plug is a nut with an external thread, and the nut is threadedly connected to the internal thread of the adjusting cavity.

[0018] Furthermore, the fitting gap between the ball and the ball seat is 0.01mm-0.03mm.

[0019] The beneficial effects of this utility model are as follows: This utility model discloses an auxiliary tool for adjusting the roundness of pipe fittings. Through the set adjustment component, the ball can be actively sent to the preset position. Through the prestress of the ball, multiple adjustment mechanisms can maintain the roundness of the cylinder wall. It is applicable to maintaining the roundness of the pipe wall at various stages before, during and after welding. It has strong versatility, is easy to operate, and can improve construction efficiency. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0021] Figure 1This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This utility model Figure 1 A schematic diagram of the structure at point A;

[0023] Figure 3 This is a schematic diagram of the assembly of the ball seat and the ball ball of this utility model. Detailed Implementation

[0024] Figure 1 The following is a schematic diagram of the structure of this utility model. As shown in the figure, the auxiliary tool and pipe fitting docking method for pipe fitting docking in this embodiment include a bracket 1 and an adjustment mechanism. The bracket 1 is circular. In use, the bracket 1 is ring-shaped and placed around the outer wall of the pipe fitting. Of course, the bracket 1 can also be a polygonal or irregularly shaped ring structure, which is suitable for supporting the adjustment mechanism. It will not be described in detail here.

[0025] The adjustment mechanism includes an adjustment member 2 that runs through the circumference of the bracket 1. The adjustment member 2 is a screw rod that passes through the bracket 1. The bracket 1 has a screw hole that is threaded into the screw rod. This allows the adjustment member 2 to control the inner end of the screw rod to extend inward into the bracket 1 or retract outward from the bracket 1, and the entire adjustment process can be locked in a set position. The "inner" refers to the axial position facing the bracket 1, and the "outer" is the opposite of the "inner". The adjustment member 2 can also be a telescopic rod structure with damping force or a multi-hole shaft structure with a limiting pin, both of which can satisfy the function of displacement of the adjustment member 2 and locking it in a set position, which will not be elaborated further here.

[0026] The adjusting component 2 has an operating end 3 located outside the bracket 1. The purpose of the operating end 3 is to make the adjusting component 2 easier to adjust. In this design, the operating end 3 is formed by extending the end face of the outer end of the screw, and the operating end 3 is shaped like an external hexagonal nut, so as to facilitate driving the screw to rotate through the operating end 3, and to make the adjustment of the bolt more convenient and reliable with the aid of tools. An elastic element II 4 is provided between the operating end 3 and the bracket 1. The elastic element II 4 has a preload force to move the operating end 3 away from the bracket 1. The purpose of the elastic element II 4 is to tighten the bolt, ensure its reliability, and reduce the screw tension. The vibration of the bolt causing it to disengage or become eccentric can make the bolt adjustment more accurate. Preferably, the outer wall of the bolt has markings, indicator colors, or marks to indicate the depth of insertion or withdrawal from the bracket 1. In this solution, the outer markings are used as an example to directly indicate the depth of insertion or withdrawal of the bolt from the bracket 1, thereby directly determining the position of the ball bearing 11 located at the inner end of the bolt. This makes it more advantageous to maintain the roundness of the pipe fitting. The elastic element II4 is a spring sleeved on the adjusting element 2. It is easy to obtain materials and has excellent elasticity. Of course, the elastic element II4 can also be a rubber strip or an elastic damping block, etc., to achieve the intended function, which will not be elaborated here.

[0027] The bracket 1 has an inner limiting groove 5 that limits the inner end of the spring. The inner limiting groove 5 is formed by an inward recess from the outer surface of the bracket 1. At the bottom of the limiting groove, there is also a guide groove 6 that is the same size as or slightly larger than the bottom periphery of the spring. When the spring is in use, the inner end is also embedded in the guide groove 6, reducing the risk of the spring coming off and improving its reliability. The screw is provided with a bearing 7 connected to the operating end 3. The bearing 7 and the bottom surface of the operating end 3 are provided with lubricating oil or coating to reduce friction. The inner ring of the bearing 7 is located inside the operating end 3 and fixed to the screw. The outer ring of the bearing 7 is pressed against the operating end 3 by the spring. The outer ring of the bearing 7 has an outer limiting groove 8 that limits the outer end of the spring. The bearing 7 is set on the screw, which makes the pressure adjustment of the spring more stable when the screw rotates, and prevents scraping. It should be understood that the fastening force of the screw on the bracket 1 exceeds the spring force, so that it will not detach on its own. Moreover, the smoothness of the screw's forward rotation and reverse rotation is basically the same, which makes the operation more reliable and the service life longer. In addition, the size of the outer limiting groove 8 is the same as or slightly larger than the size of the spring's perimeter, so that the outer end of the spring is embedded in the outer limiting groove 8, reducing the risk of the spring detaching.

[0028] In this embodiment, a clamping assembly is provided on the inner end of the adjusting member 2. The adjusting member 2 has an adjusting cavity that extends through its own length. Specifically, the adjusting cavity is coaxially opened on the screw and is used to install the clamping assembly.

[0029] The clamping assembly includes a ball seat 10 limited by an elastic element I9 in the adjusting member 2 and a ball 11 rolled within the ball seat 10. The clearance between the ball 11 and the ball seat 10 is 0.01mm-0.03mm. The elastic element I9 is ​​elastic, and the ball 11 is located on the side opposite to the elastic element I9. The ball 11 has a pressure end that extends out of the ball seat 10. The adjusting member 2 is driven to move and locked along the direction through which it penetrates the bracket 1. The elastic element I9 makes the pressure end of the ball 11 form elastic contact with the outer wall of the pipe.

[0030] In this solution, the mating structure of the ball seat 10 and the ball 11 can be any existing technology that can be purchased externally, or as in this solution, the ball seat 10 includes a main body that accommodates the ball 11 and a seat cover that is threaded onto the main body; the seat cover has an opening that allows the pressure end of the ball 11 to extend out of the ball seat 10, and the opening will not allow the ball 11 to detach from the ball seat 10; during use, the ball 11 forms elastic contact with the outer wall of the pipe in a point contact manner, which prevents damage or crushing of the pipe wall, and also has the function of structural stability, preventing deformation of the pipe wall during welding or affected by the external environment; it is beneficial to ensure the roundness of the pipe.

[0031] A stepped platform, similar to a stepped axle post, is formed between the main body and the seat cover. The inner end of the adjustment cavity has a flange so that the ball seat 10 is embedded into the adjustment cavity during use and is limited by the flange within the adjustment cavity. A stop block 12 is also provided at the inner end of the adjustment cavity. The ball seat 10 is located in the adjustment cavity and is limited by the elastic element I9 to the stop block 12. That is, the ball seat 10 is between the stop block 12 and the elastic element I9. The pressure end of the ball 11 protrudes out of the adjustment cavity. Specifically, the stop block 12 is threaded to the outer side of the inner end of the adjustment member 2, and the stop block 12 has a through hole for the ball 11 to extend. The application of the stop block 12 increases the constraint force of the inner end of the adjustment member 2 on the ball seat 10, prevents the ball seat 10 from falling off, and improves the reliability of use.

[0032] The elastic element I9 is ​​also a spring. The clamping assembly also includes a plug 13 disposed in the adjustment cavity. The elastic element I9 is ​​located in the adjustment cavity and is limited between the plug 13 and the ball seat 10. The elastic force of the elastic element I9 causes the plug 13 and the ball seat 10 to move away from each other. The plug 13 is driven to move and lock along the length of the adjustment cavity, so that the plug 13 and the ball seat 10 move closer or further apart. Specifically, the outer end of the adjustment cavity is provided with an internal thread, and the plug 13 is a nut with an external thread. The nut is threaded to the internal thread of the adjustment cavity. By adjusting the plug 13, the pressure of the elastic element I9 can be increased or decreased. According to the actual situation, the pressure indication line can be set in the adjustment cavity to adjust the pressure of the elastic element I9 accordingly for pipes with different wall thicknesses, so as to improve versatility.

[0033] The adjustment mechanism includes several sets evenly distributed around the support 1 to maintain the roundness of the pipe fitting.

[0034] This solution also discloses a pipe fitting docking method based on the aforementioned auxiliary tool for pipe fitting docking, comprising the following steps:

[0035] S1. Place the auxiliary tool ring onto the next pipe section to be welded;

[0036] S2. The roundness of the pipe fittings is measured using a roundness measuring device for pipe fittings;

[0037] If the roundness meets the preset requirements, tighten the adjusting parts 2 in sequence so that the pressure ends of the corresponding balls 11 in each of the several sets of adjusting mechanisms form elastic contact with the outer wall of the pipe.

[0038] If the roundness does not meet the preset requirements, the adjustment part 2 with reserved roundness defect area is tightened in sequence, so that the pressure end of the ball 11 corresponding to each group of adjustment mechanism except for the reserved roundness defect area forms elastic contact with the outer wall of the pipe.

[0039] The roundness defect area is corrected so that the roundness of the pipe meets the preset requirements. The correction method can be existing methods such as cable correction or jack correction, which will not be described in detail here. Adjust the adjustment part 2 of the area before the roundness defect is corrected so that the pressure end of the ball 11 of each group in several adjustment mechanisms forms elastic contact with the outer wall of the pipe.

[0040] S3. Weld the next section of pipe to the previous section of pipe in a circular weld;

[0041] S4. Remove the auxiliary tools.

[0042] Of course, this solution can also be set on both sections of pipe to be connected before the pipe fittings are joined. After the latter section of pipe is circumferentially welded to the former section of pipe, the auxiliary tools can be left unremoved and another set of auxiliary tools can be used on the latter section of pipe. This solution can limit the position of the pipe fittings in the three stages of welding, ensuring the roundness of the pipe fittings and making it more versatile.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An auxiliary tool for adjusting the roundness of pipe fittings, characterized in that: It includes a support and an adjustment mechanism. The support is ring-shaped and, in use, the support ring is fitted onto the outer wall of a pre-set pipe fitting. The adjustment mechanism includes an adjustment member extending circumferentially through the support. A clamping assembly is provided on the inner end of the adjustment member. The clamping assembly includes a ball seat that is limited by an elastic element I and a ball that is rolled within the ball seat. The clearance between the ball and the ball seat is 0.01mm-0.03mm. The elastic element I is elastic, and the ball is located on the side opposite to the elastic element I. The ball has a pressure end that extends out of the ball seat. The adjusting member is driven to move and locked along the direction of the adjusting member penetrating the bracket, and the pressure end of the ball is made to make elastic contact with the outer wall of the pipe through the elastic member I; The adjustment mechanism comprises several groups evenly distributed around the circumference of the support.

2. The auxiliary tool for adjusting the roundness of pipe fittings according to claim 1, characterized in that: The adjusting member has an adjusting cavity that extends along its own length. A stop block is provided at one end of the adjusting cavity. The ball seat is located in the adjusting cavity and is limited by the stop block by the elastic member I. The pressure end of the ball protrudes out of the adjusting cavity.

3. The auxiliary tool for adjusting the roundness of pipe fittings according to claim 2, characterized in that: The clamping assembly also includes a plug disposed in the adjustment cavity. The elastic element I is located in the adjustment cavity and is limited between the plug and the ball seat. The elastic force of the elastic element I causes the plug and the ball seat to move away from each other.

4. The auxiliary tool for adjusting the roundness of pipe fittings according to claim 3, characterized in that: The plug is driven to move and locked along the length of the adjustment cavity so that the plug and the ball seat move closer or further apart.

5. The auxiliary tool for adjusting the roundness of pipe fittings according to claim 4, characterized in that: The adjusting member has an operating end located on the outside of the bracket, and an elastic element II is provided between the operating end and the bracket. The elastic element II has a preload force that causes the operating end to move away from the bracket.

6. The auxiliary tool for adjusting the roundness of pipe fittings according to claim 5, characterized in that: The elastic element II is a spring sleeved on the adjusting element, and the bracket has an inner limiting groove that limits the inner end of the spring.

7. The auxiliary tool for adjusting the roundness of pipe fittings according to claim 6, characterized in that: The adjusting component is a screw rod that passes through the bracket, and the bracket has a screw hole that is threadedly engaged with the screw rod; The screw is equipped with a bearing connected to the operating end. The inner ring of the bearing is located inside the operating end and fixed to the screw, while the outer ring of the bearing is pressed against the operating end by a spring.

8. The auxiliary tool for adjusting the roundness of pipe fittings according to claim 7, characterized in that: The outer ring of the bearing has an outer limiting groove that limits the outer end of the spring.

9. The auxiliary tool for adjusting the roundness of pipe fittings according to claim 8, characterized in that: The adjusting cavity is coaxially formed on the screw, and the outer end of the adjusting cavity is provided with an internal thread. The plug is a nut with an external thread, and the nut is threadedly connected to the internal thread of the adjusting cavity.

Images