Tool for online maintenance of LNG copious cooling butterfly valve

Abstract

The invention belongs to overhauling tools in the technical field of valves, and particularly relates to an online overhauling tool for an LNG copious cooling butterfly valve. The tool for online maintenance of the LNG cryogenic butterfly valve comprises a support assembly, a sliding plate is arranged at the top end of the support assembly, a transmission steering assembly is arranged at the bottom end of the support assembly, an operating rod is arranged in the support assembly, the bottom end of the operating rod is fixedly connected with the transmission steering assembly, a base assembly is further arranged at the bottom end of the support assembly, and a reserved hole is formed in the base assembly. The device is used for installing the transmission steering assembly. The method has the advantages that the overhauling process is simple, and the overhauling efficiency is high; an operator only needs to operate the top of the operating rod, and then the base can be taken out after rapidly arriving at the part needing to be overhauled. And (2) the overhauling tool is light in weight and convenient to carry. The overhauling tool is high in adaptability, manual operation can be achieved, other external power input is not needed, and the overhauling requirement of the valve use site is better met.

Description

Technical Field

[0001] The patent of this invention belongs to the field of valve technology for maintenance tooling, and specifically relates to a tooling for online maintenance of LNG cryogenic butterfly valves. Background Art

[0002] Cryogenic butterfly valves are widely used in LNG pipelines and related new energy devices. Due to harsh working conditions, they are required to have online maintenance functions for valve seats and sealing rings to meet valve use requirements.

[0003] At present, most manufacturers set up maintenance openings on the side of the valve for online maintenance of the valve. However, due to the side placement of the maintenance opening, the distance from the main seal position, and the dead weight of the internal parts, it is difficult for on-site maintenance personnel to operate. This problem is particularly prominent for large-diameter cryogenic butterfly valves, and is also an important problem faced by major valve manufacturers. Summary of the invention

[0004] In order to solve the above-mentioned problems, the patent of the present invention provides a tool for online maintenance of LNG cryogenic butterfly valves which is simple to operate at the valve site, improves efficiency, and is safe and fast.

[0005] The technical solution of the patent of the present invention is: a tool for online maintenance of LNG cryogenic butterfly valves, which includes a bracket assembly, a slide plate is arranged at the top of the bracket assembly, a transmission steering assembly is arranged at the bottom of the bracket assembly, a joystick is arranged in the bracket assembly, and the bottom end of the joystick is fixedly connected to the transmission steering assembly. A base assembly is also arranged at the bottom of the bracket assembly, and a reserved hole is arranged on the base assembly for installing the transmission steering assembly.

[0006] As described above, in the tooling for online maintenance of an LNG cryogenic butterfly valve, the transmission steering assembly includes a transmission shaft and gears, and the vertical rotation of the gears is converted into the horizontal rotation of the transmission shaft through the engagement of the gears.

[0007] In the above-mentioned tooling for online maintenance of an LNG cryogenic butterfly valve, a retaining ring is arranged between the operating lever and the transmission steering assembly, a retaining ring groove is arranged on the operating lever, and the retaining ring is arranged in the retaining ring groove.

[0008] As described above, a tool for online maintenance of LNG cryogenic butterfly valves, wherein the bracket assembly includes a base, a pin hole is provided on the base, and the pin holes on the two brackets are respectively connected by pins to realize the positioning connection between the base and the bracket, and at the same time, a guide sleeve bracket assembly is placed in the transverse hole at the bottom of the bracket, a reinforcing rib groove is provided on the inner side of the bracket, and the reinforcing rib is placed and fixed by welding to form the bracket assembly body, and guide holes are respectively provided on the base and the reinforcing rib to ensure their coaxiality and form a vertical relationship with the guide hole on the guide sleeve bracket assembly, thereby forming a bracket assembly with an "L"-shaped transmission structure, a keyway and a screw hole are provided on the base surface, and the key guide key is installed and fastened with screws, and an observation hole and a lifting screw hole are provided on the base.

[0009] As described above, a tool for online maintenance of LNG cryogenic butterfly valves, wherein the operating rod includes a large outer circle and a small outer circle, so that the large outer circle cooperates with the guide hole and the guide hole respectively, and the small outer circle cooperates with the small hole on the reinforcing rib, and a retaining ring is clamped at the retaining ring groove to prevent the operating rod from moving up and down, a gear is arranged at the square head, so that the gear positioning hole cooperates with the small outer circle, the square hole cooperates with the square head, and the gear is fixed with a gasket and a screw, so that the operating rod drives the gear to rotate, the transmission shaft is arranged in the guide hole of the guide sleeve bracket assembly, and the rack is effectively meshed with the external teeth on the gear, a keyway and a screw hole are provided on the transmission shaft, and a guide key is installed, and screws are used to fasten, and by operating the transmission operating rod, the transmission shaft is moved horizontally under the meshing action of the gears, and has a telescopic function.

[0010] As described above, a tool for online maintenance of LNG cryogenic butterfly valves is provided, wherein evenly distributed support feet are provided on the base, and disassembly screw holes and screw holes are provided at the ends thereof, the disassembly screws are placed in the disassembly screw holes, closed with a cover plate, and then fixed with set screws to form a base assembly, the inner shoulder hole on the base is matched with the shoulder on the transmission shaft to ensure the coaxiality of the base assembly and the transmission shaft, the inner hole on the baffle plate is matched with the outer circle of the transmission shaft, and the locking screw is passed through the countersunk screw hole on the baffle plate and tightened in the screw hole on the base, and at the same time, the side surface of the baffle plate is made to fit with the base, the bracket assembly is installed in the skateboard support feet on both sides of the skateboard, and it is ensured that the guide key on the bracket assembly is matched with the keyway on the skateboard, and the screw passes through the waist groove on the base.

[0011] As described above, in the tooling for online maintenance of an LNG cryogenic butterfly valve, a positioning pin connects the pin hole on the slide plate and the valve body, the disassembly tooling is positioned on the valve to be disassembled, and a locking screw is used to fasten it through the countersunk screw hole on the slide plate and the screw hole on the valve body.

[0012] The effects of the present invention are as follows: (1) The maintenance process is simple and the maintenance efficiency is high. The operator only needs to operate the top of the joystick to quickly reach the part to be repaired and remove it. (2) The maintenance tool is light and easy to carry. (3) The maintenance tool has strong adaptability and can be operated manually without any other external power input, which better meets the needs of on-site maintenance of valves. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of the main structure of the tooling for online maintenance of LNG cryogenic butterfly valves

[0014] Figure 2 Schematic diagram of tooling for online maintenance of LNG cryogenic butterfly valves in direction A

[0015] Figure 3 Schematic diagram of tooling for online maintenance of LNG cryogenic butterfly valves (direction B)

[0016] Figure 4 Schematic diagram of the main structure of the skateboard

[0017] Figure 5 Schematic diagram of the joystick main structure

[0018] Figure 6 Schematic diagram of the joystick A-axis structure

[0019] Figure 7 Schematic diagram of the joystick B direction structure

[0020] Figure 8 Schematic diagram of the main structure of the bracket assembly

[0021] Fig. 9 Schematic diagram of the structure of the bracket assembly in direction A

[0022] Fig.10 Bracket assembly B-direction structural diagram

[0023] Fig.11 Schematic diagram of the main structure of the base

[0024] Fig.12 Schematic diagram of the main structure of the bracket

[0025] Fig.13 Schematic diagram of the structure of the bracket A

[0026] Fig.14 Schematic diagram of the main structure of the reinforcement rib

[0027] Fig.15 Schematic diagram of the main structure of the guide sleeve

[0028] Fig.16 Schematic diagram of the structure of the guide sleeve A direction

[0029] Fig.17Schematic diagram of the main structure of the transmission shaft

[0030] Fig.18 Schematic diagram of gear main structure

[0031] Fig.19 AA section diagram of gear

[0032] Fig. 20 Schematic diagram of the main structure of the baffle

[0033] Fig.21 Schematic diagram of the main structure of the base assembly

[0034] Fig. 22 Schematic diagram of the structure of the base assembly A

[0035] Fig.23 Schematic diagram of the main structure of the cover

[0036] Fig.24 Schematic diagram of the main structure of the base

[0037] Fig.25 AA section diagram of the base

[0038] Fig.26 Schematic diagram of tooling structure

[0039] Fig. 27 Schematic diagram of the A-direction structure of the tooling

[0040] In the figure: 1, screw; 2, slide plate; 2-1, slide plate support foot; 2-2, countersunk screw hole; 2-3, pin hole; 2-4, locking screw hole; 2-5, keyway; 3, joystick; 3-1, hexagonal head; 3-2, large outer circle; 3-3, retaining ring groove; 3-4, small outer circle; 3-5, square head; 3-6, screw hole; 4, bracket assembly; 4-1, base; 4-1-1, pin hole; 4-1-2, guide hole; 4-1-3, lifting screw hole; 4-1-4, waist groove; 4-1 -5, observation hole; 4-1-6, screw hole; 4-1-7, keyway; 4-2, bracket; 4-2-1, transverse hole; 4-2-2, reinforcing rib groove; 4-2-3, pin hole; 4-2-4, flat position; 4-3, reinforcing rib; 4-3-1, side 1; 4-3-2, side 2; 4-3-3, guide hole; 4-4, reinforcing rib; 4-5, pin; 4-6, guide key; 4-7, screw; 4-8, guide sleeve; 4-8-1, notch; 4-8-2, guide hole ; 4-8-3, keyway; 4-8-4, flat; 5, retaining ring; 6, transmission shaft; 6-1, rack; 6-2, screw hole; 6-3, keyway; 6-4, shoulder side; 6-5, shoulder; 7, gear; 7-1, external gear; 7-2, square hole; 7-3, positioning hole; 8, washer; 9, screw; 10, locking screw; 11, baffle; 11-1, countersunk screw hole; 11-2, side; 11-3, inner hole; 12, base assembly; 12-1, cover plate; 12- 1-1, countersunk screw hole; 12-1-2, side; 12-1-3, disassembly screw hole; 12-2, disassembly screw; 12-3, base; 12-3-1, screw hole; 12-3-2, support foot; 12-3-3, disassembly screw hole; 12-3-4, screw hole; 12-3-5, inner shoulder hole; 12-4, set screw; 13, screw; 14, guide key; 15, valve body; 15-1, maintenance compartment; 16, valve seat; 17, positioning pin; 18, locking screw DETAILED DESCRIPTION

[0041] The following is a further description of this patent in conjunction with the accompanying drawings:

[0042] A tool for online maintenance of LNG cryogenic butterfly valves, including a bracket assembly, a base assembly, a transmission shaft, a slide plate and other main structure maintenance tools. The base connects the bracket assembly to the maintenance port of the valve to be repaired, and keeps the bracket assembly on the center line of the valve flow channel. At the same time, after the base assembly is connected to the internal parts to be repaired, the base assembly and the bracket assembly are connected by a transmission shaft. By operating the joystick on the bracket assembly, the transmission shaft is driven to move the parts to be repaired to the specified position of the maintenance port, and then the parts are taken out for maintenance, thereby realizing online maintenance of the cryogenic butterfly valve.

[0043] The support assembly is adopted to slide left and right on the slide plate, and a transmission shaft is arranged in the support assembly to automatically extend and retract, thereby realizing that the maintenance tooling has a secondary extension and retraction function.

[0044] In the bracket assembly, a gear is arranged at the bottom of the joystick, and a rack is arranged on the transmission shaft. By operating the top of the joystick, an "L"-shaped transmission extension and retraction between the joystick and the transmission shaft can be achieved.

[0045] A guide sleeve is arranged on the outer circle of the transmission shaft, and a guide key is used between the two for guidance, so that the transmission shaft can move smoothly during the extension and retraction process.

[0046] A three-pronged base is designed on the top of the transmission shaft, and screw countersunk holes are set on the top of its three branches respectively, and the process screws are encapsulated in them with a cover plate to prevent valve use safety accidents caused by screws falling into the valve cavity during the maintenance of the tooling.

[0047] A specific example is given below.

[0048] like Figures 1 to 25 As shown, in order to realize online disassembly and assembly of the "L" type transmission structure, a certain number of pin holes 4-1-1 are opened on the base 4-1, and the pin holes 4-2-3 on the two brackets 4-2 are respectively connected by pins 4-5 to realize the positioning connection between the base 4-1 and the bracket 4-2. At the same time, a guide sleeve 4-8 is placed in the horizontal hole 4-2-1 at the bottom of the bracket. In order to ensure the rigidity of the bracket, a certain number of reinforcing rib grooves 4-2-2 are opened on the inner side of the bracket 4-2, and reinforcing ribs 4-3 and 4-4 are placed and fixed by welding to form the main body of the bracket assembly 4, and guide holes 4-1-2 are opened on the base 4-1 and guide holes 4-3-2 are opened on the reinforcing rib 4-3 to ensure their coaxiality and form a vertical relationship with the guide hole 4-8-2 on the guide sleeve 4-8, thereby forming a bracket assembly 4 with an "L" type transmission structure, and at the same time, the height from the center of the guide sleeve 4-8 to the back of the base 4-1 is ensured to be H1. In order to make the notch 4-8-1 on the guide sleeve 4-8 and the guide hole 4-1-2 and the guide hole 4-3-2 on the same side, when installing the guide sleeve 4-8, it is necessary to ensure that the flat 4-8-4 fits the flat 4-2-4. In order to realize the sliding function of the bracket assembly during use, a key slot 4-1-7 and a screw hole 4-1-6 are provided on the surface of the base 4-1. After the key guide key 4-6 is installed, it is fastened with a screw 4-7. For the convenience of tooling use, an observation hole 4-1-5 and a lifting screw hole 4-1-3 are provided on the base.

[0049] The joystick 3 is installed in the bracket assembly 4, so that its large outer circle 3-2 matches the guide hole 4-1-2 and the guide hole 4-3-2 respectively, and the small outer circle 3-4 matches the small hole on the reinforcing rib 4-4, and the retaining ring 5 is clamped at the retaining ring groove 3-3 to prevent the joystick 3 from moving up and down. A gear 7 is set at the square head 3-5, so that the positioning hole 7-3 of the gear 7 matches the small outer circle 3-4, and the square hole 7-2 matches the square head 3-5, and the gear is fixed with a washer 8 and a screw 9, so that the joystick 3 drives the gear 7 to rotate. The transmission shaft 6 is installed in the guide hole 4-8-2 of the guide sleeve 4-8, and the rack 6-1 is effectively meshed with the outer tooth 7-1 on the gear 7. In order to ensure the meshing stability, a keyway 6-3 and a screw hole 6-2 are provided on the transmission shaft 6, and a guide key 14 is installed, and the screw 13 is used to tighten. By operating the transmission joystick 3, the transmission shaft 6 is moved horizontally under the meshing action of the gears, and has a telescopic function.

[0050] A certain number of legs 12-3-2 are evenly distributed on the base 12-3, and a certain number of disassembly screw holes 12-3-3 and screw holes 12-3-4 are set at the ends thereof. The disassembly screws 12-2 are placed in the disassembly screw holes 12-3-3, and after being sealed with the cover plate 12-1, they are fixed with the set screws 12-4 to prevent the disassembly screws 12-2 from falling off during later use, thereby forming the base assembly 12. The inner shoulder hole 12-3-5 on the base 12-3 is matched with the shoulder 6-5 on the transmission shaft 6 to ensure the coaxiality of the base assembly 12 and the transmission shaft 6. After the inner hole 11-3 on the baffle 11 is matched with the outer circle of the transmission shaft 6, the locking screw 10 is passed through the countersunk screw hole 11-1 on the baffle 11 and screwed into the screw hole 12-3-4 on the base 12-3, and at the same time, the upper side surface 11-2 of the baffle 11 is fitted with the base 12-3. By operating the transmission joystick 3, the first-level transmission of the horizontal and stable extension of the base assembly 12 can be realized. The bracket assembly 4 is installed in the skateboard support feet 2-1 on both sides of the skateboard 2, and the guide key 4-6 on the bracket assembly 4 is matched with the key slot 2-5 on the skateboard 2. The screw 1 is passed through the waist groove 4-1-4 on the base 4-1 and then screwed into the locking screw hole 2-4 on the skateboard 2 to ensure that the contact surface of the skateboard 2 and the base 4-1 fit. By moving the bracket assembly 4, under the action of the guide key 4-6, the second-level transmission of the horizontal and stable extension of the base assembly 12 is realized.

[0051] like Figures 26-27 As shown, the disassembly tool is installed on the maintenance bin 15-1 on the valve body 15 to be disassembled, the pin hole 2-3 on the slide plate 2 and the valve body are connected by the positioning pin 17, the disassembly tool is positioned on the valve to be disassembled, and the locking screw 18 is used to fasten the countersunk screw hole 2-2 on the slide plate 2 and the screw hole on the valve body 15, and the disassembly tool is installed and fixed on the valve to ensure that the distance from the maintenance bin mouth to the valve center H = the height from the center of the guide sleeve 4-8 to the back of the base 4-1 is H1-the thickness of the slide plate 2 H2.

[0052] After loosening the screw 1, the slide plate 2 is moved horizontally for a distance, and then the screw 1 is tightened to ensure that the slide plate 2 and the base 4-1 are tightly fitted. After operating the hexagonal head 3-1 at the head of the joystick 3, the base assembly 12 is moved horizontally by a distance L to the valve seat 16 to be disassembled. After tightening the disassembly screw 12-2 into the threaded hole of the valve seat, the valve seat 16 is ensured to be reliably connected to the disassembly tool. Then, the hexagonal head 3-1 at the head of the joystick 3 is operated to move the valve seat 16 horizontally to the mouth of the maintenance compartment 15-1 of the valve 15. After loosening the disassembly screw 12-2, the valve seat 16 is taken out for maintenance. After the maintenance is completed, the valve seat is installed to the specified position by this tool, and the whole process of disassembling and assembling the parts to be repaired can be realized.

[0053] The present invention has many other embodiments. Without departing from the principle of the present invention, those skilled in the art can make various corresponding changes based on the present invention, but these corresponding changes should all fall within the scope of the claims to which the present invention belongs.

Claims

1. A tool for online maintenance of LNG cryogenic butterfly valve, characterized by: The invention comprises a support assembly (4), a slide plate (2) is arranged at the top of the support assembly (4), a transmission steering assembly is arranged at the bottom of the support assembly (4), a joystick (3) is arranged in the support assembly (4), the bottom end of the joystick (3) is fixedly connected to the transmission steering assembly, and a base assembly (12) is also arranged at the bottom of the support assembly (4), and a reserved hole is arranged on the base assembly (12) for installing the transmission steering assembly.

2. The tooling for online maintenance of LNG cryogenic butterfly valve according to claim 1, characterized in that: The transmission steering assembly comprises a transmission shaft (6) and a gear (7). The vertical rotation of the gear (7) is converted into the horizontal rotation of the transmission shaft (6) through the meshing of the gears.

3. The tooling for online maintenance of LNG cryogenic butterfly valve according to claim 2, characterized in that: A retaining ring (5) is arranged between the operating rod (3) and the transmission steering assembly, a retaining ring groove (3-3) is arranged on the operating rod (3), and the retaining ring (5) is arranged in the retaining ring groove (3-3).

4. The tooling for online maintenance of LNG cryogenic butterfly valve according to claim 3, characterized in that: The support assembly (4) comprises a base (4-1), a pin hole (4-1-1) is provided on the base (4-1), and the pin holes (4-2-3) on the two supports (4-2) are respectively connected by pins (4-5) to achieve the positioning connection between the base (4-1) and the support (4-2), and at the same time, a guide sleeve support assembly (4-8) is placed in the horizontal hole (4-2-1) at the bottom of the support, and a reinforcing rib groove (4-2-2) is provided on the inner side of the support (4-2), and after the reinforcing rib is placed, it is fixed by welding to form the main body of the support assembly (4), and the base is respectively provided with a plurality of guide sleeves (4-8) and a plurality of guide sleeves (4-8) are placed in the horizontal hole (4-2-1) at the bottom of the support. A guide hole (4-1-2) is provided on the base (4-1), and a guide hole (4-3-2) is provided on the reinforcing rib to ensure their coaxiality, so as to form a vertical relationship with the guide hole (4-8-2) on the guide sleeve bracket assembly (4-8), thereby forming a bracket assembly (4) with an "L"-shaped transmission structure. A keyway (4-1-7) and a screw hole (4-1-6) are provided on the surface of the base (4-1). After the key guide key (4-6) is installed, it is fastened with a screw (4-7). An observation hole (4-1-5) and a lifting screw hole (4-1-3) are provided on the base.

5. The tooling for online maintenance of LNG cryogenic butterfly valve according to claim 4, characterized in that: The operating rod (3) comprises a large outer circle (3-2) and a small outer circle (3-4), wherein the large outer circle (3-2) is respectively matched with a guide hole (4-1-2) and a guide hole (4-3-2), and the small outer circle (3-4) is matched with a small hole on a reinforcing rib (4-4), and a retaining ring (5) is clamped at a retaining ring groove (3-3) to prevent the operating rod (3) from moving up and down, and a gear (7) is arranged at the square head (3-5), so that a positioning hole (7-3) of the gear (7) is matched with the small outer circle (3-4), and the square hole (7-2) is matched with the square head (3-5), and a washer (8) is used. , screws (9) are used to fix the gears, so that the operating lever (3) drives the gear (7) to rotate, the transmission shaft (6) is arranged in the guide hole (4-8-2) of the guide sleeve bracket assembly (4-8), and the rack (6-1) is effectively meshed with the outer teeth (7-1) on the gear (7), a keyway (6-3) and a screw hole (6-2) are provided on the transmission shaft (6), and a guide key (14) is installed and fastened with screws (13), and by operating the transmission operating lever (3), the transmission shaft (6) is moved in the horizontal direction under the meshing action of the gears, and has a telescopic function.

6. The tooling for online maintenance of LNG cryogenic butterfly valve according to claim 5, characterized in that: Uniformly distributed legs (12-3-2) are provided on the base (12-3), and disassembly screw holes (12-3-3) and screw holes (12-3-4) are provided at the ends thereof. The disassembly screws (12-2) are placed in the disassembly screw holes (12-3-3), which are sealed with a cover plate (12-1) and then fixed with set screws (12-4) to form a base assembly (12). The inner shoulder hole (12-3-5) on the base (12-3) is matched with the shoulder (6-5) on the transmission shaft (6) to ensure the coaxiality of the base assembly (12) and the transmission shaft (6). The baffle plate (11) is used to fix the base assembly (12) and the transmission shaft (6). After the upper inner hole (11-3) is matched with the outer circle of the transmission shaft (6), a locking screw (10) is passed through the countersunk screw hole (11-1) on the baffle plate (11) and screwed into the screw hole (12-3-4) on the base (12-3), and at the same time, the upper side surface (11-2) of the baffle plate (11) is made to fit with the base (12-3), and the bracket assembly (4) is installed in the slide support feet (2-1) on both sides of the slide plate (2), and the guide key (4-6) on the bracket assembly (4) is matched with the keyway (2-5) on the slide plate (2), and the screw (1) passes through the waist groove (4-1-4) on the base (4-1).

7. The tooling for online maintenance of LNG cryogenic butterfly valve according to claim 6, characterized in that: The positioning pin (17) connects the pin hole (2-3) on the slide plate (2) and the valve body, and the disassembly tool is positioned on the valve to be disassembled. The locking screw (18) is fastened through the countersunk screw hole (2-2) on the slide plate (2) and the screw hole on the valve body (15).

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