Positioning tool for eccentric valve pipe orifice welding

Abstract

The utility model discloses a positioning tool for eccentric valve pipe orifice welding. The positioning tool comprises a rotary table, a supporting table, a plurality of locking devices arranged on the rotary table and a supporting piece used for placing and installing an eccentric valve. The center of the lower end of the turntable is connected with an output shaft of the rotating device; the supporting table is a circular plate with the outer diameter smaller than that of the rotary table and is provided with a positioning hole in clearance fit with the center positioning column. The supporting table is mounted on the rotary table through the positioning hole and is locked through a locking device; the eccentric valve comprises a transversely-arranged valve body, a first valve pipe opening and a second valve pipe opening, wherein the first valve pipe opening and the second valve pipe opening are perpendicularly formed in the upper side of the left end and the lower side of the right end of the valve body. The supporting table is further provided with a pipe opening positioning table matched with a second valve pipe opening. After the valve body is placed and installed on the supporting piece, the pipe opening positioning table positions the second valve pipe opening, and the axis of the first valve pipe opening corresponds to the axis of the center positioning column. The positioning device has the advantages of being simple in structure, high in positioning speed and high in positioning precision.

Description

Technical Field

[0001] The utility model relates to the technical field of eccentric valve pipe orifice welding, in particular to a positioning tool for eccentric valve pipe orifice welding. Background Art

[0002] Eccentric valves (eccentric valves) refer to high-temperature sleeve valves with large volume, irregular shape, thick wall, etc. Such valves weigh more than 20 tons and are more than three meters high. Figure 1 As shown, the eccentric valve 1 includes a transversely arranged valve body 11 and a first valve pipe opening 12 and a second valve pipe opening 13 vertically arranged at the upper and lower sides of the valve body 11. The first valve pipe opening 12 and the second valve pipe opening 13 are respectively arranged at the left end and the right end of the valve body 11.

[0003] Manual welding is currently widely used, but the welding efficiency is low and the weld quality is difficult to guarantee. In order to improve the welding efficiency and weld quality, the narrow gap automatic welding method is innovatively adopted by combining the structural characteristics of the eccentric valve. Specifically, the welding principle is to place the eccentric valve 1 on a rotating platform (turntable 2), and the welding gun 61 of the automatic welding equipment 6 is stationary, and the welding gun 61 corresponds to the weld 14 on the first valve nozzle 12. The workpiece rotates relative to the welding gun 61. This method replaces the traditional manual arc welding and can greatly improve the welding efficiency and welding quality of the valve.

[0004] Since the narrow gap automatic welding requires high precision of concentricity and coaxiality of the eccentric valve 1 assembly, and the eccentric valve 1 is large in size and irregular in shape, it is difficult to position and fix. In addition, the eccentric valve 1 itself is heavy, and when it is placed on the turntable 2, it is difficult to achieve rapid positioning and ensure the concentricity (positioning accuracy) of the first valve nozzle 12 and the turntable 2. Utility Model Content

[0005] The utility model aims to provide a positioning tool for welding an eccentric valve pipe orifice with a simple structure, fast positioning speed and high positioning accuracy in view of the shortcomings of the prior art.

[0006] The technical purpose of the utility model is achieved through the following technical solutions:

[0007] A positioning tool for welding an eccentric valve pipe mouth, comprising a turntable, a support platform, a plurality of locking devices arranged on the turntable and a support for placing and installing the eccentric valve; the center of the lower end of the turntable is connected to the output shaft of the rotating device, and the center of the upper end is provided with a center positioning column; the support platform is a circular plate with an outer diameter smaller than that of the turntable, and is provided with a positioning hole that matches the clearance of the center positioning column; the support platform is installed on the turntable through the positioning hole and is locked by the locking device; the eccentric valve comprises a transversely arranged valve body, a first valve pipe mouth and a second valve pipe mouth that are vertically arranged on the upper left end and the lower right end of the valve body; the support platform is also provided with a pipe mouth positioning platform that matches the second valve pipe mouth; after the valve body is placed and installed on the support, the pipe mouth positioning platform positions the second valve pipe mouth, and the axis of the first valve pipe mouth corresponds to the axis of the center positioning column.

[0008] The support members on the support platform are two oppositely arranged first support plates and second support plates, the upper ends of the first support plates and the second support plates are provided with grooves for placing the valve body, the first groove of the first support plate corresponds to the left part of the valve body, and the second groove of the second support plate corresponds to the right part of the valve body; the pipe mouth positioning platform is arranged between the first support plate and the second support plate.

[0009] The first support plate is arranged on the left side of the central positioning column and close to the central positioning column, and the second support plate is arranged on the right side of the central positioning column and away from the central positioning column; a counterweight block is also arranged on the support platform, and the counterweight block is arranged on the left side of the first support plate.

[0010] The turntable and the support platform are detachably connected, and the locking device and the turntable are detachably connected.

[0011] The turntable is provided with a plurality of radially distributed inverted T-shaped grooves, and the locking device is provided with an inverted T-shaped slider that cooperates with the inverted T-shaped grooves; when the support platform is installed on the turntable, the position of the locking device on the turntable is adjusted according to the outer diameter of the support platform; the locking device advances along the inverted T-shaped groove to the outer side of the circumference of the support platform through the inverted T-shaped slider.

[0012] The locking device includes a locking nut, a screw and a limiting plate. The screw is connected to an inverted T-shaped slider. The limiting plate is provided with through holes at both ends of the screw for the screw to pass through. When the upper end of the screw passes through the through hole of the limiting plate, it is connected to the locking nut.

[0013] The limiting plate is L-shaped, and includes an upper side section that abuts against the upper end surface of the support platform and a side section arranged on the lower side of the right end of the upper side section; when the upper side section abuts against the upper side of the support platform, the lower end surface of the side section abuts against the upper end surface of the turntable; the through hole is arranged in the upper side section.

[0014] The through hole is a rectangular through hole opened along the length direction of the upper side section.

[0015] The support platform is provided with a plurality of weight-reducing holes.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The utility model includes a turntable, a support platform, a plurality of locking devices arranged on the turntable, and a support member for placing and installing an eccentric valve; the center of the lower end of the turntable is connected to the output shaft of the rotating device, and the center of the upper end thereof is provided with a center positioning column; the support platform is a circular plate with an outer diameter smaller than that of the turntable, and is provided with a positioning hole that matches the clearance of the center positioning column; the support platform is installed on the turntable through the positioning hole and is locked by a locking device; the eccentric valve includes a valve body arranged horizontally, a first valve pipe mouth and a second valve pipe mouth arranged vertically on the upper left end and the lower right end of the valve body; the support platform is also provided with a pipe mouth positioning platform that matches the second valve pipe mouth; after the valve body is placed and installed on the support member, the pipe mouth positioning platform positions the second valve pipe mouth, and the axis of the first valve pipe mouth corresponds to the axis of the center positioning column. The center positioning column arranged at the center of the turntable ensures that the axis of the support platform and the turntable are completely coincident. The pipe mouth positioning platform is used to quickly position the second valve pipe mouth on the support member, so that the eccentric valve can be quickly positioned, and the concentricity of the first valve pipe mouth and the turntable can be ensured at the same time. The utility model has the advantages of simple structure, fast positioning speed and high positioning accuracy.

[0018] 2. The turntable and the support table of the utility model are detachably connected, and the locking device and the turntable are detachably connected. The support table and the turntable are detachably connected, which is convenient for replacement and maintenance. At the same time, the outer diameter of the support table will also change to a certain extent. The locking device and the turntable are detachably connected, which is convenient for moving the locking device to a suitable position when replacing the support table to adapt to the change in the outer diameter of the support table.

[0019] 3. The turntable of the utility model is provided with a plurality of radially distributed inverted T-shaped slide grooves, and the locking device is provided with an inverted T-shaped slider matched with the inverted T-shaped slide grooves. When the support platform is installed on the turntable, the position of the locking device on the turntable is adjusted according to the outer diameter of the support platform; the locking device moves along the inverted T-shaped slide groove to the outer side of the circumference of the support platform through the inverted T-shaped slider. The adoption of this technical measure has the advantages of simple structure and quick locking of the support platform.

[0020] 4. The locking device of the utility model includes a locking nut, a screw and a limit plate. The screw is connected to the inverted T-shaped slider. The limit plate is provided with through holes for the screw to pass through its upper and lower ends. When the upper end of the screw passes through the through hole of the limit plate, it is connected to the locking nut. When the limit plate of the utility model is connected to the inverted T-shaped slider through the locking nut and the screw, the limit plate can be replaced accordingly according to actual needs. The height of the limit plate can also be adjusted by the locking nut to make it suitable for support tables of different thicknesses. The adoption of this technical measure has the advantages of simple structure and easy replacement.

[0021] 5. The limit plate of the utility model is L-shaped, and includes an upper section that abuts against the upper end surface of the support platform and a side section arranged at the lower side of the right end of the upper section; when the upper section abuts against the upper side of the support platform, the lower end surface of the side section abuts against the upper end surface of the turntable; the through hole is arranged in the upper section. The L-shaped limit plate has the advantage of high stability, and it can abut and press the upper side of the support platform, and at the same time, the side section plays a supporting role on the upper section.

[0022] 6. The through hole of the utility model is a rectangular through hole opened along the length direction of the upper side section. This technical measure is adopted to facilitate fine adjustment of the limit plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure when the utility model is used in conjunction with automatic welding equipment;

[0024] Figure 2 It is a structural schematic diagram of the utility model;

[0025] Figure 3 yes Figure 2 Structural schematic diagram of the middle support platform;

[0026] Figure 4 yes Figure 2 A schematic diagram of the structure of the middle locking device;

[0027] Reference numerals: 1—eccentric valve; 11—valve body; 12—first valve outlet; 13—second valve outlet; 14—weld;

[0028] 2—turntable; 21—center positioning column; 22—inverted T-shaped slideway;

[0029] 3—support platform; 31—positioning hole; 32—pipe opening positioning platform; 33—counterweight block; 34—weight reduction hole;

[0030] 4—support member; 41—first support plate; 411—first groove; 42—second support plate; 421—second groove;

[0031] 5—locking device; 51—inverted T-shaped slider; 52—limiting plate; 521—upper side section; 5211—through hole; 522—side section; 53—locking nut; 54—screw;

[0032] 6—Automatic welding equipment; 61—Welding gun. DETAILED DESCRIPTION

[0033] 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.

[0034] 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.

[0035] 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.

[0036] like Figure 1 — Figure 4As shown, a positioning tool for welding an eccentric valve pipe mouth, comprises a turntable 2, a support platform 3, a plurality of locking devices 5 arranged on the turntable 2 and a support member 4 for placing and installing an eccentric valve 1; the center of the lower end of the turntable 2 is connected to the output shaft of the rotating device, and the center of the upper end thereof is provided with a center positioning column 21; the support platform 3 is a circular plate with an outer diameter smaller than that of the turntable 2, and is provided with a positioning hole 31 which is clearance-matched with the center positioning column 21; the support platform 3 is installed on the turntable 2 through the positioning hole 31 and is locked by the locking device 5; the eccentric valve 1 comprises a transversely arranged valve body 11, a first valve pipe mouth 12 and a second valve pipe mouth 13 which are vertically arranged on the upper left end and the lower right end of the valve body 11; a pipe mouth positioning platform 32 which is matched with the second valve pipe mouth 13 is also provided on the support platform 3; after the valve body 11 is placed and installed on the support member 4, the pipe mouth positioning platform 32 positions the second valve pipe mouth 13, and the axis of the first valve pipe mouth 12 corresponds to the axis of the center positioning column 21. In actual use, the central positioning column 21 set at the center of the turntable 2 ensures that the axis of the support platform 3 and the turntable 2 are completely coincident. The second valve pipe mouth 13 is quickly positioned on the support member 4 by using the pipe mouth positioning platform 32, so that the eccentric valve 1 can be quickly positioned, and the concentricity of the first valve pipe mouth 12 and the turntable 2 can be ensured. The adoption of this technical measure has the advantages of simple structure, fast positioning speed and high positioning accuracy.

[0037] like Figure 1 , Figure 2 As shown, the turntable 2 is a truncated cone structure, the center of its lower end is connected to the rotating shaft of the rotating device, and the center of its upper end is provided with a center positioning column 21. In actual use, a common rotating device includes a motor. The center of the lower end of the turntable 2 is connected to the output shaft of the motor, so that the axis of the center positioning column 21 corresponds to the axis of the output shaft.

[0038] like Figure 1 , Figure 2 , Figure 3As shown, the support platform 3 is a circular plate structure with an outer diameter smaller than that of the turntable 2; a positioning hole 31 is provided at its center to be in clearance with the central positioning column 21. After the support platform 3 is placed and installed on the turntable 2 through the positioning hole 31, the support platform 3 is locked on the turntable 2 by the locking device 5. In actual use, a plurality of weight-reducing holes 34 are provided on the support platform 3, and the weight-reducing holes 34 can adopt a circular, fan-shaped or other structure. By providing the weight-reducing holes 34, the weight of the support platform 3 and the use of materials are reduced. The support platform 3 is also provided with a nozzle positioning platform 32 that cooperates with the second valve nozzle 13. The nozzle positioning platform 32 is arranged on the support platform 3 according to the distance between the first valve nozzle 12 and the second valve nozzle 13. Specifically, the distance between the axis of the nozzle positioning platform 32 and the axis of the support platform 3 is equal to the distance between the axis of the first valve nozzle 12 and the axis of the second valve nozzle 13. The shape of the nozzle positioning platform 32 matches the opening shape of the second valve nozzle 13, and it is generally a cylindrical, conical boss, etc. After the valve body 11 is placed on the support 4, the position is adjusted so that the second valve nozzle 13 is aligned with the nozzle positioning platform 32 and positioned on the support platform 3, the positioning hole 31 of the support platform 3 is coaxial with the central positioning column 21, and the axis of the first valve nozzle 12 corresponds to the axis of the central positioning column 21. By arranging the nozzle positioning platform 32 matched with the second valve nozzle 13 on the support platform 3, the eccentric valve 1 can be quickly positioned, which has the advantages of simple structure, fast positioning speed and high positioning accuracy.

[0039] like Figure 1 , Figure 2 As shown, the support member 4 is fixed on the support platform 3, and is used to place the valve body 11. The outer contour of the valve body 11 is a horizontally arranged cylindrical shape. Specifically, the support member 4 on the support platform 3 is a first support plate 41 and a second support plate 42 arranged oppositely. The upper ends of the first support plate 41 and the second support plate 42 are provided with a groove for placing the valve body 11, the first groove 411 of the first support plate 41 corresponds to the left part of the valve body 11, and the second groove 43 of the second support plate 42 corresponds to the right part of the valve body 11; the nozzle positioning platform 32 is arranged between the first support plate 41 and the second support plate 42. In actual use, the first support plate 41 and the second support plate 42 are arranged oppositely and vertically fixedly connected to the upper end of the support platform 3. The first groove 411 and the second groove 43 are mainly used to place the valve body 11, and their shapes can be inverted trapezoidal, U-shaped, etc. The first support plate 41 and the second support plate 42 are provided with a plurality of waist-shaped holes, and the waist-shaped holes are mainly used to reduce the weight of the first support plate 41 and the second support plate 42 and the use of materials.

[0040] like Figure 1 , Figure 2 , Figure 3As shown, since the first valve orifice 12 and the second valve orifice 13 of the eccentric valve 1 are respectively arranged at the upper left end and the lower right end of the valve body 11, when the eccentric valve 1 is placed and installed on the first support plate 41 and the second support plate 42, its center of gravity will be offset. Therefore, in actual use, it is necessary to set a counterweight block 33 on the support platform 3. Specifically, the first support plate 41 is arranged on the left side of the center positioning column 21 and is close to the center positioning column 21, and the second support plate 42 is arranged on the right side of the center positioning column 21 and is far away from the center positioning column 21; the support platform is also provided with a counterweight block 33, and the counterweight block 33 is arranged on the left side of the first support plate 41.

[0041] like Figure 1 , Figure 2 As shown, the turntable 2 is detachably connected to the support platform 3, and the locking device 5 is detachably connected to the turntable 2. In actual use, due to the difference in the size of the eccentric valve 1, it is necessary to replace different support members 4 for different types of eccentric valves 1. Since the support member 4, the nozzle positioning platform 32, the counterweight block 33, etc. are all arranged on the support platform 3, the support platform 3 and the turntable 2 are detachably connected, which is convenient for replacement and maintenance. At the same time, the outer diameter of the support platform 3 will also change to a certain extent. The locking device 5 is detachably connected to the turntable 2, which is convenient for moving the locking device 5 to a suitable position when replacing the support platform 3 to adapt to the change in the outer diameter of the support platform 3. In actual use, if the thickness of the support platform 3 also changes, there is still a need to replace the locking device 5. Therefore, the locking device 5 is detachably connected to the turntable 2, which is convenient for adjusting the position of the locking device 5 on the turntable 2 according to the actual situation and replacing it with a dependent locking device 5 according to the change of the support platform 3.

[0042] like Figure 1 , Figure 2 As shown, specifically, the turntable 2 is provided with a plurality of radially distributed inverted T-shaped slots 22, and the locking device 5 is provided with an inverted T-shaped slider 51 that cooperates with the inverted T-shaped slots 22. When the support table 3 is installed on the turntable 2, the position of the locking device 5 on the turntable 2 is adjusted according to the outer diameter of the support table 3; the locking device 5 advances to the outer circumference of the support table 3 along the inverted T-shaped slot 22 through the inverted T-shaped slider 51. The adoption of this technical measure has the advantages of simple structure and fast locking of the support table 3. The inverted T-shaped slot 22 is arranged on the upper end surface of the turntable 2, and extends inward from the outer circumference of the turntable 2 until it ends at the outer side of the center positioning column 21. There are at least two inverted T-shaped slots 22, and correspondingly, there are also two locking devices 5. In order to improve stability, there are generally four or more inverted T-shaped slots 22, and correspondingly, there are four or more locking devices 5.

[0043] like Figure 1 , Figure 2 , Figure 4As shown, the locking device 5 includes a locking nut 53, a screw 54 and a limiting plate 52. The screw 54 is connected to the inverted T-shaped slider 51. The limiting plate 52 is provided with through holes 5211 for the screw 54 to pass through its upper and lower ends. After the upper end of the screw 54 passes through the through hole 5211 of the limiting plate 52, it is connected to the locking nut 53. In actual use, the limiting plate 52 is mainly used to press the support platform 3, and the support platform 3 has problems such as needing to be replaced. When the limiting plate 52 is connected to the inverted T-shaped slider 51 through the locking nut 53 and the screw 54, the limiting plate 52 can be replaced accordingly according to actual needs. The height of the limiting plate 52 can also be adjusted by the locking nut 53 to make it suitable for support platforms 3 of different thicknesses. The adoption of this technical measure has the advantages of simple structure and easy replacement.

[0044] like Figure 1 , Figure 2 , Figure 4 As shown, the limiting plate 52 is L-shaped, and includes an upper section 521 that abuts against the upper end surface of the support platform 3 and a side section 522 disposed at the lower right end of the upper section 521; when the upper section 521 abuts against the upper side of the support platform 3, the lower end surface of the side section 522 abuts against the upper end surface of the turntable 2; and a through hole 5211 is disposed in the upper section 521. The L-shaped limiting plate 52 has the advantage of high stability, and can abut and press against the upper side of the support platform 3, and at the same time, the side section 522 supports the upper section 521.

[0045] like Figure 1 , Figure 2 , Figure 4 As shown, the through hole 5211 is a rectangular through hole 5211 opened along the length direction of the upper side section 521. In actual use, the rectangular through hole 5211 can also be a waist-shaped hole, etc., which mainly increases the length of the through hole 5211. This technical measure is used to facilitate fine adjustment of the limit plate 52.

Claims

1. A positioning tool for welding an eccentric valve orifice, characterized in that: It includes a turntable, a support platform, a plurality of locking devices arranged on the turntable, and a support member for placing and installing an eccentric valve; The center of the lower end of the turntable is connected to the output shaft of the rotating device, and the center of the upper end is provided with a center positioning column; the support platform is a circular plate with an outer diameter smaller than that of the turntable, and is provided with a positioning hole that matches the clearance of the center positioning column; the support platform is installed on the turntable through the positioning hole and is locked by a locking device; The eccentric valve comprises a transversely arranged valve body, a first valve pipe opening and a second valve pipe opening vertically arranged at the upper left end and the lower right end of the valve body; The support platform is also provided with a pipe nozzle positioning platform that cooperates with the second valve pipe nozzle; After the valve body is placed and installed on the support, the nozzle positioning platform positions the nozzle of the second valve, and the axis of the nozzle of the first valve corresponds to the axis of the central positioning column.

2. The eccentric valve orifice welding positioning tool according to claim 1, characterized in that: The support members on the support platform are two oppositely arranged first support plates and second support plates, the upper ends of the first support plates and the second support plates are provided with grooves for placing the valve body, the first groove of the first support plate corresponds to the left part of the valve body, and the second groove of the second support plate corresponds to the right part of the valve body; The nozzle positioning platform is arranged between the first support plate and the second support plate.

3. The eccentric valve orifice welding positioning tool according to claim 2, characterized in that: The first support plate is arranged on the left side of the central positioning column and close to the central positioning column, and the second support plate is arranged on the right side of the central positioning column and away from the central positioning column; a counterweight block is also arranged on the support platform, and the counterweight block is arranged on the left side of the first support plate.

4. The eccentric valve orifice welding positioning tool according to claim 1, characterized in that: The turntable and the support platform are detachably connected, and the locking device and the turntable are detachably connected.

5. The eccentric valve orifice welding positioning tool according to claim 4, characterized in that: The turntable is provided with a plurality of radially distributed inverted T-shaped slide grooves, and the locking device is provided with an inverted T-shaped sliding block matched with the inverted T-shaped slide grooves; After the support platform is installed on the turntable, the position of the locking device on the turntable is adjusted according to the outer diameter of the support platform; the locking device moves forward along the inverted T-shaped slide groove to the outer side of the circumference of the support platform through the inverted T-shaped slider.

6. The eccentric valve orifice welding positioning tool according to claim 5, characterized in that: The locking device includes a locking nut, a screw and a limiting plate. The screw is connected to an inverted T-shaped slider. The limiting plate is provided with through holes at both ends of the screw for the screw to pass through. When the upper end of the screw passes through the through hole of the limiting plate, it is connected to the locking nut.

7. The eccentric valve orifice welding positioning tool according to claim 6, characterized in that: The limiting plate is L-shaped, and includes an upper side section that abuts against the upper end surface of the support platform and a side section arranged on the lower side of the right end of the upper side section; when the upper side section abuts against the upper side of the support platform, the lower end surface of the side section abuts against the upper end surface of the turntable; the through hole is arranged in the upper side section.

8. The eccentric valve orifice welding positioning tool according to claim 6 or 7, characterized in that: The through hole is a rectangular through hole opened along the length direction of the upper side section.

9. The eccentric valve orifice welding positioning tool according to claim 1, characterized in that: The support platform is provided with a plurality of weight-reducing holes.

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