Digitization tool for assisting line pressing of bypass valve of gas turbine and using method of digitization tool

Abstract

The invention relates to the technical field of bypass valve maintenance, and discloses a datamation tool for assisting line pressing of a bypass valve of a gas turbine, the datamation tool comprises the bypass valve and a datamation tool body, the datamation tool body comprises a supporting disc, a gradienter, three infrared positioning lamps, supporting legs, a hand wheel, a pull rod and a dial indicator, the gradienter and the supporting disc are coaxially arranged, the gradienter is arranged on the upper end face of the supporting disc, the three infrared positioning lamps are arranged on the outer side of the circumference of the supporting disc at equal intervals, the three fixing bases are arranged on the outer side of the lower end face of the supporting disc at equal intervals and used for being connected with the supporting legs, and the supporting legs are connected with the fixing bases through hinges. In the line pressing process of the bypass valve of the steam turbine, datamation measurement of the relative height of each point position of the valve seat is achieved, a worker is guided to conduct adjustment, the working efficiency is greatly improved, the maintenance time is saved, the maintenance quality is guaranteed through data display, and internal leakage after the bypass valve is installed is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of bypass valve maintenance, and in particular to a digitized tool for assisting the compression line of a gas turbine bypass valve and a method for using the tool. Background Art

[0002] As an important part of the steam turbine system, the tightness of the steam turbine bypass valve directly affects the thermal efficiency of the steam turbine. During the inspection and maintenance of the bypass valve, the relative height of the valve seat needs to be adjusted to achieve the fit between the valve seat and the valve core sealing surface.

[0003] At present, due to the lack of mature measuring tools, maintenance workers adjust the relative height of the valve seat by repeatedly pressing the wire and checking the pressing effect as feedback. This method has high repetitiveness, high labor intensity, long time consumption and accidental nature.

[0004] After the bypass valve is reinstalled, the sealing surface is not tightly connected, resulting in internal leakage of the valve, which does not achieve the maintenance effect. Therefore, it is necessary to invent a wire pressing tool for auxiliary turbine bypass valve with exquisite structure, convenient use, high accuracy and digital display. Summary of the invention

[0005] Technical issues solved

[0006] In view of the deficiencies of the prior art, the present invention provides a digital tool for assisting the steam turbine bypass valve crimping and a method for using the tool, which is mainly used to solve the problem that due to the lack of mature measuring tools, maintenance workers repeatedly crimp and check the crimping effect as feedback to adjust the relative height of the valve seat. This method has high repeatability, high labor intensity, long time consumption, and is accidental. After the bypass valve is reinstalled, the sealing surface is not tightly connected, resulting in internal leakage of the valve, and the maintenance effect is not achieved. Therefore, it is necessary to invent a tool for assisting the steam turbine bypass valve crimping with a sophisticated structure, easy use, high accuracy, and digital display.

[0007] Technical Solution

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A digital tool for assisting the line pressing of a gas turbine bypass valve comprises a bypass valve and a digital tool body, wherein the digital tool body comprises a support plate, a spirit level, three infrared positioning lights, support legs, a hand wheel, a pull rod and a micrometer, wherein the spirit level is coaxially arranged with the support plate, the spirit level is placed on the upper end face of the support plate, the three infrared positioning lights are equidistantly arranged on the outer side of the circumference of the support plate, three fixing seats are equidistantly arranged on the outer side of the lower end face of the support plate for connection with the support legs, the support legs and the fixing seats are hingedly connected, the support legs can rotate relative to each other, the support legs are provided with a coarse adjustment nut and a fine adjustment nut, the hand wheel is coaxially arranged with the support plate, located at the lower part of the support plate, and connected to the support plate via a rotating shaft.

[0010] Furthermore, the bypass valve includes a pneumatic actuator, a valve bracket, an air inlet, an air outlet, a valve core, a valve seat and a valve body. The valve core and the valve seat are coaxially arranged, and the sealing surface of the valve core and the sealing surface of the valve seat fit together to achieve sealing. The pneumatic actuator drives the valve core to move up and down to achieve opening and closing of the bypass valve.

[0011] Based on the above scheme, the lower end surface of the support plate is arranged with slideways of different diameters, the pulley at the top of the micrometer is located in the slideway of the support plate, the probe at the bottom of the micrometer is vertically in contact with the valve seat, and the micrometer is connected to the rotating shaft through a pull rod.

[0012] As a further solution of the present invention, the pull rod is composed of connecting rod one and connecting rod two, and the connecting rod one and connecting rod two are interconnected by a screw and a screw sleeve. The length of the pull rod can be adjusted by rotating the screw, and the micrometer can be fixed by placing it in different slides.

[0013] A method for using a digital tool for assisting the compression line of a gas turbine bypass valve comprises the following steps:

[0014] S1: When overhauling the bypass valve, remove the pneumatic actuator, valve bracket, and sealing end cover. Place the digitized tool body on the valve body and support it through the coarse adjustment nut and fine adjustment nut on the support leg;

[0015] S2: If the bypass valve is in a horizontal state, the level gauge is used as feedback for leveling. If the bypass valve is in a tilted state, an infrared positioning lamp is used to make the digitized tool body coincide with the center line of the bypass valve.

[0016] S3: Turn the hand wheel to drive the dial gauge to rotate along the valve seat for one circle, and the relative height of each point of the valve seat can be measured. By adjusting the valve seat limit screw, the relative height of each point of the valve seat can be adjusted;

[0017] S4: When the relative height of each point of the valve seat meets the requirements, use the valve core to press the line and check the pressing mark. If the pressing mark is unqualified, the relative height of the valve seat point can be adjusted higher or lower in a targeted and digitized manner through the measuring tool until the pressing line is qualified and the valve core and valve seat sealing surface are completely in line.

[0018] Beneficial Effects

[0019] Compared with the prior art, the present invention provides a digital tool for assisting the compression line of a gas turbine bypass valve and a method for using the tool, which has the following beneficial effects:

[0020] 1. The present invention realizes the digital measurement of the relative height of each point of the valve seat during the compression process of the turbine bypass valve, guides the staff to make adjustments, greatly improves the work efficiency and saves maintenance time.

[0021] 2. The present invention ensures the quality of inspection and maintenance through data display, and prevents internal leakage of the bypass valve after installation.

[0022] 3. The present invention drives the micrometer to rotate along the valve seat for one circle by turning the hand wheel, and can measure the relative height of each point of the valve seat. By adjusting the valve seat limit screw, the relative height of each point of the valve seat is adjusted to achieve complete fit between the valve core and the valve seat sealing surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the use of a data tool for assisting the compression line of a gas turbine bypass valve proposed by the present invention;

[0024] Figure 2 A schematic diagram of the three-dimensional structure of a gas turbine bypass valve proposed by the present invention;

[0025] Figure 3 A schematic cross-sectional structure diagram of a gas turbine bypass valve proposed in the present invention;

[0026] Figure 4 A three-dimensional structural schematic diagram of a data-based tool for assisting the compression line of a gas turbine bypass valve proposed by the present invention;

[0027] Figure 5 A schematic diagram of the support frame slideway structure of a data tool for assisting the gas turbine bypass valve press line proposed by the present invention;

[0028] Figure 6 A schematic diagram of a pull rod structure of a digital tool for assisting the compression line of a gas turbine bypass valve proposed by the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of an infrared positioning lamp of a data tool for assisting the compression line of a gas turbine bypass valve proposed by the present invention.

[0030] In the figure: 1. Digital tool body; 2. Bypass valve; 3. Valve seat; 4. Pneumatic actuator; 5. Valve bracket; 6. Air inlet; 7. Air outlet; 8. Valve core; 9. Level; 10. Support plate; 11. Support leg; 12. Coarse adjustment nut; 13. Fine adjustment nut; 14. Micrometer; 15. Handwheel; 16. Pull rod; 17. Slide; 18. Connecting rod one; 19. Connecting rod two; 20. Infrared positioning light. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0032] Reference Figure 1-Figure 7 A data tool for assisting the compression line of a gas turbine bypass valve comprises a bypass valve 2 and a data tool body 1. The bypass valve 2 comprises a pneumatic actuator 4, a valve bracket 5, an air inlet 6, an air outlet 7, a valve core 8, a valve seat 3 and a valve body. The valve core 8 and the valve seat 3 are coaxially arranged. The sealing surface of the valve core 8 and the sealing surface of the valve seat 3 are mutually fitted to achieve sealing. The pneumatic actuator 4 drives the valve core 8 to move up and down to achieve the opening and closing of the bypass valve (2). During maintenance, the pneumatic actuator 4, the valve bracket 5 and the sealing end cover are removed, and the valve core 8 places the data tool body 1 on the valve body.

[0033] In the present invention, the digitized tool body 1 includes a support plate 10, a level 9, three infrared positioning lamps 20, a support leg 11, a hand wheel 15, a pull rod 16 and a micrometer 14. The level 9 is coaxially arranged with the support plate 10, the level 9 is placed on the upper end surface of the support plate 10, the three infrared positioning lamps 20 are arranged at equal distances on the outer side of the circumference of the support plate 10, and three fixing seats are arranged at equal intervals on the outer side of the lower end surface of the support plate 10 for connecting with the support leg 11. The support leg 11 is connected to the fixing seat by a hinge, and the support leg 11 can rotate relatively, which is convenient for use and storage. The leg 11 is provided with a coarse adjustment nut 12 and a fine adjustment nut 13 for adjusting the relative height of the support leg 11. The hand wheel 15 is coaxially arranged with the support plate 10, located at the lower part of the support plate 10, and connected to the support plate 10 through a rotating shaft. After disassembly, the digitized tool body 1 is placed on the valve body, supported by the coarse adjustment nut 12 and the fine adjustment nut 13 on the support leg 11. If the bypass valve 2 is in a horizontal state, leveling is performed with the spirit level 9 as feedback. If the bypass valve 2 is in an inclined state, an infrared positioning lamp 20 is used to make the center line of the digitized tool 1 coincide with that of the bypass valve 2.

[0034] In the present invention, a slideway 17 of different diameters is arranged on the lower end surface of the support plate 10, the pulley at the top of the micrometer 14 is located in the slideway 17 of the support plate 10, the probe at the bottom of the micrometer 14 vertically contacts the valve seat 3, and the micrometer 14 is connected to the rotating shaft through a pull rod 16.

[0035] In the present invention, the pull rod 16 is composed of a connecting rod 18 and a connecting rod 19. The connecting rod 18 and the connecting rod 19 are connected to each other through a screw and a screw sleeve. The length of the pull rod 16 can be adjusted by rotating the screw. The micrometer 14 can be fixed in different slideways 17 to measure bypass valves (2) of different sizes.

[0036] A method for using a digital tool for assisting the compression line of a gas turbine bypass valve comprises the following steps:

[0037] S1: When overhauling the bypass valve 2, remove the pneumatic actuator 4, valve bracket 5, sealing end cover, and valve core 8. Place the digitization tool body 1 on the valve body and support it through the coarse adjustment nut 12 and fine adjustment nut 13 on the support leg 11;

[0038] S2: If the bypass valve 2 is in a horizontal state, leveling is performed using the level meter 9 as feedback; if the bypass valve 2 is in a tilted state, the infrared positioning lamp 20 is used to make the digitization tool 1 coincide with the center line of the bypass valve 2;

[0039] S3: Turn the hand wheel 15 to drive the dial gauge 14 to rotate along the valve seat 3 for one circle, and the relative height of each point of the valve seat 3 can be measured. By adjusting the limiting screw of the valve seat 3, the relative height of each point of the valve seat 3 can be adjusted;

[0040] S4: When the relative heights of each point of the valve seat 3 meet the requirements, use the valve core 8 to press the line and check the pressing marks. If the pressing marks are unqualified, the relative heights of the 3 points of the valve seat can be raised or lowered in a targeted and digitized manner through measuring tools until the pressing line is qualified and the valve core 8 and the sealing surface of the valve seat 3 are completely in line.

[0041] The electrical components mentioned in this article are all connected to an external main controller and 220V mains electricity, and the main controller can be a conventional known device for controlling a computer or the like.

[0042] In the description of this article, it should be noted that relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A digital tool for assisting the compression line of a gas turbine bypass valve, comprising a bypass valve (2) and a digital tool body (1), characterized in that: The data tool body (1) comprises a support plate (10), a level (9), three infrared positioning lamps (20), a support leg (11), a hand wheel (15), a pull rod (16) and a micrometer (14); the level (9) is coaxially arranged with the support plate (10); the level (9) is placed on the upper end surface of the support plate (10); the three infrared positioning lamps (20) are equidistantly arranged on the outer side of the circumference of the support plate (10); three fixing seats are equidistantly arranged on the outer side of the lower end surface of the support plate (10) for connection with the support leg (11); the support leg (11) and the fixing seat are connected by a hinge; the support leg (11) can rotate relative to each other; the support leg (11) is provided with a coarse adjustment nut (12) and a fine adjustment nut (13); the hand wheel (15) is coaxially arranged with the support plate (10), located at the lower part of the support plate (10), and connected to the support plate (10) via a rotating shaft.

2. A digital tool for assisting the compression line of a gas turbine bypass valve according to claim 1, characterized in that: The bypass valve (2) comprises a pneumatic actuator (4), a valve bracket (5), an air inlet (6), an air outlet (7), a valve core (8), a valve seat (3) and a valve body. The valve core (8) and the valve seat (3) are coaxially arranged. The sealing surface of the valve core (8) and the sealing surface of the valve seat (3) fit each other to achieve sealing. The pneumatic actuator (4) drives the valve core (8) to move up and down to achieve opening and closing of the bypass valve (2).

3. A digital tool for assisting the compression line of a gas turbine bypass valve according to claim 1, characterized in that: The lower end surface of the support plate (10) is arranged with slideways (17) of different diameters, the pulley at the top of the micrometer (14) is located in the slideway (17) of the support plate (10), the probe at the bottom of the micrometer (14) is vertically in contact with the valve seat (3), and the micrometer (14) is connected to the rotating shaft through a pull rod (16).

4. A digital tool for assisting the compression line of a gas turbine bypass valve according to claim 3, characterized in that: The pull rod (16) is composed of a connecting rod 1 (18) and a connecting rod 2 (19). The connecting rod 1 (18) and the connecting rod 2 (19) are connected to each other through a screw and a screw sleeve. The length of the pull rod (16) can be adjusted by rotating the screw. The dial gauge (14) can be placed in different slideways (17) to achieve fixation.

5. A method for using a digital tool for assisting the compression line of a gas turbine bypass valve according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1: When inspecting the bypass valve (2), remove the pneumatic actuator (4), valve bracket (5), sealing end cover, valve core (8), place the data tool body (1) on the valve body, and support it through the coarse adjustment nut (12) and fine adjustment nut (13) on the support leg (11); S2: If the bypass valve (2) is in a horizontal state, leveling is performed using the level gauge (9) as feedback; if the bypass valve (2) is in a tilted state, an infrared positioning lamp (20) is used to make the center line of the digitization tool body (1) coincide with the center line of the bypass valve (2); S3: Turn the hand wheel (15) to drive the dial gauge (14) to rotate along the valve seat (3) for one circle, so as to measure the relative height of each point of the valve seat (3). By adjusting the limiting screw of the valve seat (3), the relative height of each point of the valve seat (3) can be adjusted. S4: When the relative heights of various points on the valve seat (3) meet the requirements, use the valve core (8) to press the line and check the pressing traces. If the pressing traces are unqualified, the relative heights of the points on the valve seat (3) can be specifically and digitally adjusted up or down by using a measuring tool until the pressing line meets the requirements and the sealing surfaces of the valve core (8) and the valve seat (3) are completely in line.

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