Adjustable ball valve arm handle auxiliary dismounting tool

Abstract

The utility model discloses a kind of auxiliary dismounting tools of adjustable ball valve arm handle, including ball valve arm handle and valve stem, ball valve arm handle and valve stem are connected by connecting bolt and are connected with each other, through hole and first threaded hole for connecting connecting bolt are respectively arranged on ball valve arm handle and valve stem, the periphery of ball valve arm handle is distributed with several second threaded holes, further including ball valve arm handle dismounting mechanism and ball valve arm handle mounting mechanism, the ball valve arm handle dismounting mechanism and ball valve arm handle mounting mechanism all include mounting plate, multiple fixed slots and guide holes are distributed on mounting plate, fixed slot and guide hole are respectively annularly distributed in the periphery of mounting plate, fixed slot and guide hole are mutually staggered and set along the circumferential direction of mounting plate between them.The utility model can improve the dismounting convenience of operating personnel to ball valve arm handle, and reduce the possibility of deformation damage of ball valve arm handle in dismounting process.

Description

Technical Field

[0001] This utility model relates to an auxiliary tool for disassembling and assembling ball valves, and more particularly to an auxiliary tool for disassembling and assembling the handle of an adjustable ball valve. Background Technology

[0002] During the inspection and maintenance of the inlet ball valves of pumped storage power stations, it is necessary to disassemble and assemble the ball valve arm. Based on this, patent 202120250544.9 discloses an auxiliary tool for arm disassembly and assembly, which uses a crossbar, screw, and nut to achieve manual disassembly and assembly of the ball valve arm. However, this tool is only suitable for small-sized inlet ball valves. For large inlet ball valves, the arm weight can reach hundreds of kilograms, requiring manufacturers to use a crane to lift the arm during disassembly and assembly. Furthermore, workers cannot manually rotate the nut to engage or disengage the arm; instead, they must use hydraulic pullers, hydraulic jacks, or other equipment to pull or push the ball valve arm. Additionally, tightening the connecting bolts or nuts on the ball valve arm also requires the use of a hydraulic torque wrench, making it difficult to use the tool described in the aforementioned patent for disassembly and assembly of the ball valve arm.

[0003] Based on this, the existing method for disassembling the inlet ball valve of large generating units uses the ball valve shell or external mounting bracket as a support surface, employing hydraulic pullers, hydraulic jacks, and other equipment to pull or push the ball valve arm. Simultaneously, threaded holes are provided around the ball valve arm. If the ball valve arm becomes stuck or encounters excessive resistance during disassembly, operators can screw bolts in from the outside to compress the valve stem, causing a localized portion of the ball valve arm to separate from the valve stem and move outward under this compressive force. However, this disassembly method has several drawbacks. Firstly, because the ball valve arm is only hoisted by a crane during disassembly, without corresponding limiting measures, the ball valve arm is prone to swaying, shifting, or tilting and getting stuck, increasing the difficulty of disassembly and assembly. Secondly, if the ball valve arm tilts and gets stuck, continuing to use hydraulic equipment to forcefully push or pull it can easily cause deformation and damage to the ball valve arm and valve stem at the engagement point. Furthermore, due to the large size and weight of the ball valve arm, it is difficult for operators to ensure the perpendicularity of the ball valve arm relative to the valve stem during disassembly and assembly, which increases the possibility of the ball valve arm tilting or shifting.

[0004] Therefore, the existing methods for disassembling and assembling the inlet ball valve of large generating units have problems such as difficult operation and poor disassembly and assembly stability. Utility Model Content

[0005] The purpose of this invention is to provide an auxiliary tool for disassembling and assembling an adjustable ball valve arm. It improves the ease of disassembly and assembly for operators and reduces the possibility of deformation and damage to the ball valve arm during the disassembly and assembly process.

[0006] The technical solution of this utility model is as follows: an auxiliary disassembly and assembly tool for an adjustable ball valve arm, including a ball valve arm and a valve stem, which are connected to each other by connecting bolts. The ball valve arm and valve stem are respectively provided with through holes and first threaded holes for connecting bolts. Several second threaded holes are distributed around the ball valve arm. The tool also includes a ball valve arm disassembly mechanism and a ball valve arm installation mechanism. Both the ball valve arm disassembly mechanism and the ball valve arm installation mechanism include a mounting plate. Multiple fixing grooves and guide holes are distributed on the mounting plate. The fixing grooves and guide holes are respectively arranged in a ring around the mounting plate, and the fixing grooves and guide holes are staggered with each other along the circumference of the mounting plate.

[0007] In the aforementioned adjustable ball valve arm handle auxiliary disassembly and assembly tool, the mounting plate is detachably connected to both sides of the mounting plate, and one end of the push plate extends to the outside of the mounting plate and forms a support surface for supporting the hydraulic jack.

[0008] In the aforementioned auxiliary disassembly and assembly tool for the adjustable ball valve arm, the ball valve arm disassembly mechanism further includes a disassembly bolt, a disassembly nut, and a first guide bolt. The disassembly bolt passes through the fixing groove and the through hole in sequence and is threaded to the valve stem. The disassembly nut is located between the mounting plate and the ball valve arm and is threaded to the disassembly bolt. The first guide bolt passes through the guide hole through the mounting plate and is threaded to the second threaded hole.

[0009] In the aforementioned auxiliary disassembly and assembly tool for the adjustable ball valve arm, the number of disassembly bolts is six and they are arranged in a ring on the mounting plate; the number of the first guide bolts is four or six and they are evenly distributed in a ring on the mounting plate.

[0010] In the aforementioned auxiliary disassembly and assembly tool for adjustable ball valve handles, the ball valve handle installation mechanism further includes a limiting bolt, an mounting bolt, a second guide bolt, and a stop; wherein the middle part of the limiting bolt is connected to the mounting plate via a guide hole, and the end of the limiting bolt is threadedly connected to a second threaded hole; the middle part of the second guide bolt is connected to the mounting plate via a guide hole, and the end of the limiting bolt is threadedly connected to a second threaded hole; the limiting bolt and the second guide bolt are staggered relative to each other; and the stop is located at the interval between the mounting plate and the ball valve handle.

[0011] In the aforementioned auxiliary disassembly and assembly tool for the adjustable ball valve arm, there are two limiting bolts, which are symmetrically installed in the guide holes on both sides of the mounting plate.

[0012] In the aforementioned auxiliary disassembly and assembly tool for the adjustable ball valve arm, there are four second guide bolts, which are arranged in a ring around the guide holes around the mounting plate, and the limit bolts and the second guide bolts are staggered.

[0013] In the aforementioned auxiliary disassembly and assembly tool for the adjustable ball valve arm, the number of mounting bolts is six and they are arranged in a ring on the mounting plate.

[0014] In the aforementioned auxiliary disassembly and assembly tool for the adjustable ball valve arm, a guide sleeve is welded onto the mounting plate outside the guide hole, and one end of the guide hole passes through the guide sleeve and communicates with the outside.

[0015] Compared with the prior art, this utility model has the following characteristics:

[0016] (1) By limiting the structure of the ball valve arm disassembly mechanism, this utility model enables the valve stem to be used as a reference for the installation of the mounting plate during disassembly, so that the mounting plate can be perpendicular to the valve stem after installation; by threading the first guide bolt through the mounting plate to connect the ball valve arm, the ball valve arm can be limited and guided by the cooperation of the first guide bolt and the mounting plate, reducing the possibility of the ball valve arm shaking and shifting during the pulling process; the mounting plate and the push plate can also serve as the support surface of the disassembly equipment after connection, which reduces the installation difficulty of the disassembly equipment on the one hand, and improves the positioning accuracy of the disassembly equipment on the other hand, reducing the possibility of the ball valve arm shifting due to the tilt of the disassembly equipment;

[0017] (2) By limiting the ball valve arm mounting mechanism, the ball valve arm can be installed with the ball valve arm as the reference face to the mounting plate, so that the mounting plate and the ball valve arm are parallel to each other after installation; then, after the ball valve arm is hoisted, the ball valve arm and the mounting plate are supported by the cooperation of the mounting bolt and the valve stem, so that the two are set perpendicular to each other with the valve stem; then, the ball valve arm is guided by the cooperation of the second guide bolt and the mounting plate, and the mounting plate is used as the support face to install the jacking equipment, so that the jacking equipment can apply horizontal extrusion force to the ball valve arm after installation, and the ball valve arm is horizontally fastened to the valve stem under the guidance of the second guide bolt, which effectively avoids the possibility of the ball valve arm shaking and shifting during hoisting and fastening.

[0018] (3) With the above cooperation, both the ball valve arm mounting mechanism and the ball valve arm disassembly mechanism can be based on the mounting plate, and the ball valve arm can be disassembled and installed by replacing different parts, thereby effectively improving the utilization rate of this utility model; at the same time, since the disassembly and assembly positions of the above parts are all located on the outside or around the edges of the mounting plate, it leaves enough operating space, thereby improving the convenience of disassembly and assembly of the ball valve arm for operators.

[0019] (4) Based on the above, this application can significantly reduce the time for manual alignment and position correction when loading and unloading ball valve handles, as well as the time for handling ball valve handle jamming, thereby reducing the loading and unloading time of ball valve handles from more than 12 hours to less than 8 hours, which effectively improves the loading and unloading efficiency of ball valve handles.

[0020] Therefore, this utility model can improve the ease of disassembly and assembly of the ball valve arm for operators and reduce the possibility of deformation and damage to the ball valve arm during disassembly and assembly. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of Example 1;

[0022] Figure 2 This is a flowchart of the operation process for disassembling the ball valve arm;

[0023] Figure 3 This is a structural schematic diagram of Example 2;

[0024] Figure 4 This is a connection structure diagram of the mounting plate and the push plate in Embodiment 2;

[0025] Figure 5 This is a flowchart of the operation process for installing the ball valve arm;

[0026] Figure 6 This is a front view of the inlet ball valve of a large generating unit at the ball valve arm handle;

[0027] Figure 7 yes Figure 6 Sectional view along direction A.

[0028] The markings in the attached diagram are as follows: 1-Mounting plate, 2-Push plate, 3-Removal bolt, 4-Removal nut, 5-First guide bolt, 6-Limit bolt, 7-Mounting bolt, 8-Second guide bolt, 9-Stop, 10-Guide sleeve, 100-Ball valve arm, 200-Valve stem, 300-Connecting bolt, 400-Through hole, 500-First threaded hole, 600-Second threaded hole, 101-Fixing groove, 102-Guide hole. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0030] Example 1. Ball valve arm disassembly mechanism, configured as follows: Figure 1As shown, the device includes a mounting plate 1, on which multiple fixing grooves 101 and guide holes 102 are distributed. The fixing grooves 101 and guide holes 102 are respectively arranged in a ring around the perimeter of the mounting plate 1. The fixing grooves 101 are U-shaped grooves with one end penetrating through the mounting plate 1, and the guide holes 102 are round holes. The fixing grooves 101 and guide holes 102 are staggered relative to each other along the circumference of the mounting plate 1.

[0031] It also includes a disassembly bolt 3, a disassembly nut 4, and a first guide bolt 5. The disassembly bolt 3 passes through the fixing groove 101 and the through hole 400 of the ball valve arm 100 in sequence and is then threaded to the valve stem 200. The disassembly nut 4 is located between the mounting plate 1 and the ball valve arm 100 and is threaded to the disassembly bolt 3. The first guide bolt 5 passes through the guide hole 102 through the mounting plate 1 and is then threaded to the second threaded hole 600 of the ball valve arm 100.

[0032] The number of disassembly bolts 3 is six and they are arranged in a ring on the mounting plate 1; the number of the first guide bolts 5 is four or six and they are evenly distributed in a ring on the mounting plate 1.

[0033] A guide sleeve 10 is welded onto the mounting plate 1 outside the guide hole 102. One end of the guide hole 102 passes through the guide sleeve 10 and communicates with the outside.

[0034] The existing connection structure between the ball valve arm 100 and the valve stem 200 is as follows: Figure 6 and 7 As shown, one side of the ball valve arm 100 is engaged with the valve stem 200 via a stepped groove. The ball valve arm 100 and the valve stem 200 are connected to each other by a connecting bolt 300. The ball valve arm 100 and the valve stem 200 are respectively provided with a through hole 400 and a first threaded hole 500 for connecting the connecting bolt 300. Several second threaded holes 600 are distributed around the ball valve arm 100.

[0035] The disassembly method of the ball valve arm is as follows: Figure 2 As shown, it includes the following steps:

[0036] A. The ball valve arm 100 is hoisted externally using a crane, and then the connecting bolt 300 between the ball valve arm 100 and the valve stem 200 is removed;

[0037] B. Fix the mounting plate 1 to the outside of the ball valve arm 100 using the disassembly bolt 3 and the disassembly nut 4. One end of the disassembly bolt 3 passes through the fixing groove 101 of the mounting plate 1 and the through hole 400 of the ball valve arm 100 in sequence and is threaded onto the first threaded hole 500 of the valve stem 200. The middle part of the disassembly bolt 3 is connected to the disassembly nut 4. After the disassembly nut 4 is tightened, it cooperates with the disassembly bolt 3 to press and fix the mounting plate 1 from both sides, so that the mounting plate 1 and the valve stem 200 are set perpendicular to each other and form an interval distance for the ball valve arm 100 to slide and disengage.

[0038] C. After passing the first guide bolt 5 through the guide hole 102 of the mounting plate 1, it is threaded into the second threaded hole 600 around the ball valve arm 100;

[0039] D. Using the mounting plate 1 as the support surface, the ball valve arm 100 is pulled out horizontally by the hydraulic puller, and the first guide bolt 5 guides the ball valve arm 100 during its movement, so that the ball valve arm 100 remains perpendicular to the valve stem 200 during the pulling process.

[0040] This embodiment defines the ball valve arm disassembly mechanism so that the mounting plate 1 can be fixed with the valve stem 200 as the installation reference, ensuring that the mounting plate 1 and the valve stem 200 are perpendicular to each other. Then, the ball valve arm 100 is guided by the cooperation of the mounting plate 1 and the first guide bolt 5. At the same time, the mounting plate 1 is used as a support surface for the disassembly device, so that the disassembly device can apply a horizontal driving force to the ball valve arm 100 during disassembly, and the first guide bolt 5 guides the ball valve arm 100, so that the ball valve arm 100 moves horizontally under the action of the driving force until it separates from the valve stem 200, thus realizing the disassembly function.

[0041] Example 2. Ball valve arm mounting mechanism, configured as follows: Figure 3 and 4 As shown, the device includes a mounting plate 1, on which multiple fixing grooves 101 and guide holes 102 are distributed. The fixing grooves 101 and guide holes 102 are respectively arranged in a ring around the perimeter of the mounting plate 1. The fixing grooves 101 are U-shaped grooves with one end penetrating through the mounting plate 1, and the guide holes 102 are round holes. The fixing grooves 101 and guide holes 102 are staggered relative to each other along the circumference of the mounting plate 1.

[0042] It also includes a limiting bolt 6, a mounting bolt 7, a second guide bolt 8, and a stop block 9; wherein the middle part of the limiting bolt 6 is connected to the mounting plate 1 through the guide hole 102, and the end of the limiting bolt 6 is threadedly connected to the second threaded hole 600 of the ball valve arm 100; the middle part of the second guide bolt 8 is connected to the mounting plate 1 through the guide hole 102, and the end of the limiting bolt 6 is threadedly connected to the second threaded hole 600 of the ball valve arm 100; the limiting bolt 6 and the second guide bolt 8 are staggered relative to each other; and the stop block 9 is located at the interval between the mounting plate 1 and the ball valve arm 100.

[0043] The number of limiting bolts 6 is two, and they are symmetrically installed in the guide holes 102 on both sides of the mounting plate 1.

[0044] The number of the second guide bolts 8 is four, and they are arranged in a ring around the guide holes 102 around the mounting plate 1. The limiting bolts 6 and the second guide bolts 8 are staggered with each other.

[0045] The number of mounting bolts 7 is six, and they are arranged in a ring on the mounting plate 1.

[0046] A guide sleeve 10 is welded onto the mounting plate 1 outside the guide hole 102. One end of the guide hole 102 passes through the guide sleeve 10 and communicates with the outside.

[0047] The mounting plate 1 is detachably connected to two sides of a push plate 2. One end of the push plate 2 extends to the outside of the mounting plate 1 and forms a support surface for supporting the hydraulic jack.

[0048] The installation method of the ball valve arm is as follows: Figure 5 As shown, it includes the following steps:

[0049] H. After passing the two limiting bolts 6 through part of the guide holes 102 of the mounting plate 1, they are threaded into the two second threaded holes 600 at opposite corners of the ball valve arm 100. At the same time, the stop block 9 is inserted into the gap between the ball valve arm 100 and the mounting plate 1. The mounting plate 1 is limited by the cooperation of the limiting bolts 6 and the stop block 9, so that the mounting plate 1 and the ball valve arm 100 are parallel to each other and leave a gap distance for accommodating the hydraulic jack.

[0050] I. The ball valve arm 100 and mounting plate 1 are hoisted together by a crane to the outside of the valve stem 200;

[0051] J. After passing the mounting bolt 7 through the fixing groove 101 of the mounting plate 1 and the through hole 400 of the ball valve arm 100 in sequence, it is threaded onto the first threaded hole 500 of the valve stem 200, and the mounting bolt 7 supports the ball valve arm 100 in place of the trolley.

[0052] K. After passing the four second guide bolts 8 through part of the guide holes 102 of the mounting plate 1, thread them into the remaining second threaded holes 600 of the ball valve arm 100, and then remove the limit bolts 6 on the ball valve arm 100.

[0053] L. Remove the stop block 9 between the ball valve handle 100 and the mounting plate 1, and place the hydraulic jack at the gap between the push plate 2 and the ball valve handle 100. Then, using the push plate 2 as the support surface, push the ball valve handle 100 with the hydraulic jack, so that the ball valve handle 100 moves horizontally inward under the pushing action until it is fully engaged with the valve stem 200. During the movement, the ball valve handle 100 is guided by the second guide bolt 8, so that the ball valve handle 100 remains perpendicular to the valve stem 200.

[0054] M. Remove the ball valve arm mounting mechanism from the ball valve arm 100 and screw in the connecting bolt 300, thereby using the connecting bolt 300 to fix the ball valve arm 100 and the valve stem 200.

[0055] This embodiment, by defining the ball valve arm mounting mechanism, allows the mounting plate 1 to be fixed to the ball valve arm 100 as a reference during installation. This ensures that the mounting plate 1 is parallel to the ball valve arm 100 and forms a specified interval after installation. After the ball valve arm 100 is hoisted into place, the mounting bolts 7 are used to lift and limit its position, placing the ball valve arm 100 and valve stem 200 in the snap-fit ​​position. By removing the limiting bolt 6 and simultaneously screwing in the second guide bolt 8, the second guide bolt 8 can guide the ball valve arm 100 during subsequent pushing, ensuring that the ball valve arm 100 remains perpendicular to the valve stem 200 during snap-fit, thus reducing the possibility of the ball valve arm 100 tilting under force. This combination allows for rapid positioning and limiting of the ball valve arm 100 during installation, improving the installation stability of the ball valve arm 100 and the ease of operation for workers.

Claims

1. An auxiliary tool for disassembling and assembling an adjustable ball valve handle, comprising a ball valve handle (100) and a valve stem (200), wherein the ball valve handle (100) and the valve stem (200) are connected to each other by a connecting bolt (300), and the ball valve handle (100) and the valve stem (200) are respectively provided with a through hole (400) and a first threaded hole (500) for connecting the connecting bolt (300), and a plurality of second threaded holes (600) are distributed around the ball valve handle (100), characterized in that: It also includes a ball valve arm handle disassembly mechanism and a ball valve arm handle installation mechanism. Both the ball valve arm handle disassembly mechanism and the ball valve arm handle installation mechanism include a mounting plate (1). The mounting plate (1) has multiple fixing grooves (101) and guide holes (102) distributed on it. The fixing grooves (101) and guide holes (102) are respectively arranged in a ring around the mounting plate (1). The fixing grooves (101) and guide holes (102) are staggered with each other along the circumference of the mounting plate (1).

2. The auxiliary disassembly and assembly tool for the adjustable ball valve arm according to claim 1, characterized in that: The mounting plate (1) is detachably connected to two sides of a push plate (2), one end of which extends to the outside of the mounting plate (1) and forms a support surface for supporting the hydraulic jack.

3. The auxiliary disassembly and assembly tool for the adjustable ball valve arm according to claim 1, characterized in that: The ball valve arm disassembly mechanism further includes a disassembly bolt (3), a disassembly nut (4), and a first guide bolt (5). The disassembly bolt (3) passes through the fixing groove (101) and the through hole (400) in sequence and is then threaded to the valve stem (200). The disassembly nut (4) is located between the mounting plate (1) and the ball valve arm (100) and is threaded to the disassembly bolt (3). The first guide bolt (5) passes through the guide hole (102) through the mounting plate (1) and is then threaded to the second threaded hole (600).

4. The auxiliary disassembly and assembly tool for the adjustable ball valve arm according to claim 3, characterized in that: The number of the disassembly bolts (3) is six and they are arranged in a ring on the mounting plate (1); the number of the first guide bolts (5) is four or six and they are evenly distributed in a ring on the mounting plate (1).

5. The auxiliary disassembly and assembly tool for the adjustable ball valve arm according to claim 1, characterized in that: The ball valve arm mounting mechanism further includes a limiting bolt (6), a mounting bolt (7), a second guide bolt (8), and a stop (9); wherein the middle part of the limiting bolt (6) is connected to the mounting plate (1) through the guide hole (102), the end of the limiting bolt (6) is threaded to the second threaded hole (600), the middle part of the second guide bolt (8) is connected to the mounting plate (1) through the guide hole (102), the end of the limiting bolt (6) is threaded to the second threaded hole (600), the limiting bolt (6) and the second guide bolt (8) are staggered relative to each other, and the stop (9) is located at the interval between the mounting plate (1) and the ball valve arm (100).

6. The auxiliary disassembly and assembly tool for the adjustable ball valve arm according to claim 5, characterized in that: The number of the limiting bolts (6) is two, and they are symmetrically installed in the guide holes (102) on both sides of the mounting plate (1).

7. The auxiliary disassembly and assembly tool for the adjustable ball valve arm according to claim 6, characterized in that: The number of the second guide bolts (8) is four and they are arranged in a ring around the guide holes (102) around the mounting plate (1). The limit bolts (6) and the second guide bolts (8) are staggered.

8. The auxiliary disassembly and assembly tool for the adjustable ball valve arm according to claim 5, characterized in that: The number of mounting bolts (7) is six and they are arranged in a ring on the mounting plate (1).

9. The auxiliary disassembly and assembly tool for the adjustable ball valve arm according to claim 1, characterized in that: A guide sleeve (10) is welded onto the mounting plate (1) outside the guide hole (102). One end of the guide hole (102) passes through the guide sleeve (10) and communicates with the outside.

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