Steam seal back arc cutting device

Abstract

The utility model relates to the technical field of steam seal back arc cutting, and in particular to a steam seal back arc cutting device, comprising an annular seat, a plurality of ground-connected columns are arranged at the bottom of the annular seat, a circular base is fixed at the top center of the annular seat, an annular driving mechanism is fixedly installed in the annular space at the bottom of the circular base, a back arc cutting mechanism is fixedly installed at the output end of the annular driving mechanism, the bottom of the arc-shaped steam seal block is supported on the top of the circular base, and a pressing tool is installed on the upper outer wall of the center column. The steam seal back arc cutting device designed in the utility model can effectively locate the center of the current arc-shaped steam seal block through the centering component when adjusting the back arc surface of the arc-shaped steam seal block, and can quickly complete the tight positioning through the pressing tool after the positioning is completed, thereby ensuring the positioning of the center of the circle and the rapid positioning of the entire arc-shaped steam seal block, thereby ensuring the accuracy of the subsequent arc-shaped steam seal block processing.

Description

Technical Field

[0001] The utility model relates to the technical field of steam seal back arc cutting, in particular to a steam seal back arc cutting device. Background Art

[0002] The steam seal block is an arc-shaped structure installed between the moving and static parts of the steam turbine. It is used to reduce or prevent steam leakage and air leakage on the vacuum side. Since a certain gap must be maintained between the rotor and the stator, steam will leak from these gaps, resulting in energy loss. In the installed state, the steam seal block composed of multiple arc-shaped segments cooperates to form a seal and is used to prevent steam leakage and air infiltration, thereby improving the efficiency and safety of the steam turbine.

[0003] The precise processing and adjustment of the gas seal back arc is very important to maintain the normal operation of the steam turbine. If the steam seal gap does not meet the standard during the adjustment process, it is necessary to cut or mill the gas seal back arc or trim the spring sheet.

[0004] At present, when performing gas seal back arc processing, it is generally necessary to first complete the clamping and positioning of the parts, and then rely on the high-speed motor on the processing equipment to drive the tool to rotate at high speed, and use the handle on the beam to complete the milling of the steam seal block back arc in an arc motion.

[0005] For example, in the patent document with patent publication number CN218964255U, a back arc scraping device for the steam seal of the steam turbine partition of a thermal power plant is disclosed. The device mainly realizes the scraping of the cutting drill in the back and forth direction through the cooperation of the back arc scraping switch, the scraping machine, the cutting drill bit, the fixing frame, the mounting block and the fixing screw. However, this steam seal back arc scraping structure needs to adjust the nut, groove, steam seal clamp, screw, adjustment hand wheel and steam seal positioning pin to achieve the purpose of finding the center of the circle during cutting. This operation is relatively cumbersome during adjustment. In addition, during the adjustment process, the two ends of the steam seal block need to be frequently adjusted and kept clamped and positioned.

[0006] From the above, it can be seen that the above-mentioned steam seal back arc scraping device has the disadvantages of complicated operation and difficulty in locating the center of the circle when performing steam seal back arc scraping treatment.

[0007] Therefore, the utility model optimizes the design for the deficiencies in the prior art, and proposes a steam seal back arc cutting device which can achieve rapid centering of the steam seal block by rapidly replacing the center positioning. Utility Model Content

[0008] The utility model is to solve one of the above-mentioned technical problems, and the technical scheme adopted is: a steam seal back arc cutting device, comprising a horizontally arranged annular seat, a plurality of ground-connected columns are arranged at the bottom of the annular seat, the bottom of each of the ground-connected columns is fixed on the ground, a circular base is fixed at the top center of the annular seat, an annular driving mechanism is fixedly installed in the annular space at the bottom of the circular base, a back arc cutting mechanism is fixedly installed at the output end of the annular driving mechanism, a central column coaxially arranged with the inner end of the annular driving mechanism is fixedly installed at the top center of the circular base, a centering component is coaxially sleeved on the periphery of the central column, an arc-shaped steam seal block to be cut is placed against the outer side wall of the centering component, the bottom of the arc-shaped steam seal block is supported on the top of the circular base, a pressing tool is installed on the upper outer side wall of the central column, and the bottom of the pressing tool is used to press the top of the arc-shaped steam seal block.

[0009] In any of the above schemes, preferably, the annular drive mechanism includes a main drive motor fixedly mounted on the central bottom of the circular base and coaxially and vertically arranged therewith, a rotating disk is fixedly mounted on the motor shaft of the main drive motor, a horizontal electric cylinder is bolted and fixed on an outer side wall of one side of the rotating disk, a steel sleeve is fixedly mounted on the outer end of the piston rod of the horizontal electric cylinder, and the steel sleeve is used to be sleeved on the lower end outer side wall of the back arc cutting mechanism and fixed by screws.

[0010] In any of the above schemes, preferably, an outer end support seat is fixedly mounted on the outer side wall of the outer end of the cylinder barrel of the horizontal electric cylinder, and a support ball movably supported on the ground is mounted on the bottom of the outer end support seat.

[0011] In any of the above schemes, it is preferred that the back-arc cutting mechanism includes a supporting frame fixedly inserted in the steel sleeve, the upper horizontal section of the supporting frame is arranged toward one side of the central column, a cutting end motor frame is fixedly installed on the upper end of the supporting frame, a vertically arranged cutting motor is fixedly installed on the cutting end motor frame, a cutting tool is installed on the motor shaft of the cutting motor, and the cutting tool is used to complete the back-arc cutting process of the arc-shaped steam seal block.

[0012] In any of the above schemes, it is preferred that the centering assembly includes a center disk vertically sleeved on the outer wall of the center column, an adjustment ring is coaxially sleeved on the outer wall of the center disk, the outer diameter of the adjustment ring is processed as required, and a top pressure stud is bolted and fixedly installed on the top of the center disk on the side away from the arc-shaped steam seal block, and the top of the top pressure stud is flush with the top of the current arc-shaped steam seal block.

[0013] In any of the above schemes, it is preferred that the pressing tool includes a positioning plate bolted to the top of the central column, a plurality of clamping electric cylinders are fixed at even intervals along the circumference of the bottom of the positioning plate, and a friction pressing plate is sleeved on the outer wall of the central column below each of the clamping electric cylinders, and the bottom of the friction pressing plate is pressed against the top of the arc-shaped steam seal block.

[0014] In any of the above solutions, preferably, the lower outer side wall of the main drive motor is fixed to the inner side wall of the annular space through a main drive motor frame.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] 1. The steam seal back arc cutting device designed in the utility model can effectively locate the center of the current arc-shaped steam seal block through the centering component when adjusting the back arc surface of the arc-shaped steam seal block. After the positioning is completed, the pressing tool can quickly complete the tight positioning, ensuring the positioning of the center of the circle and the rapid positioning of the entire arc-shaped steam seal block, thereby ensuring the accuracy of the subsequent arc-shaped steam seal block processing.

[0017] 2. The steam seal back arc cutting device designed in the utility model can cooperate with the annular driving mechanism to adjust the overall position of the back arc cutting mechanism when repairing the back arc of the arc-shaped steam seal block in the positioning state, ensuring that the cutting tool of the back arc cutting mechanism can abut against the back arc surface of the arc-shaped steam seal block according to the set size.

[0018] 3. When it is necessary to process the back arc surface of the arc-shaped steam seal block, the fixed axis rotation of the total drive motor of the annular drive mechanism can drive the outer end of the horizontal electric cylinder installed thereon to drive the back arc cutting mechanism to swing along the fixed diameter circle, thereby completing the rapid processing of the back arc surface of the current arc-shaped steam seal block. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or components are generally identified by similar reference numerals. In the drawings, each element or component is not necessarily drawn according to the actual scale.

[0020] Figure 1 It is a structural schematic diagram of the utility model.

[0021] Figure 2 It is a partial cross-sectional structural schematic diagram of the utility model.

[0022] Figure 3 The utility model is a schematic top view of the structure in which the arc-shaped steam seal block is installed on the outer side wall of the centering component.

[0023] In the figure, 1, annular seat; 2, ground column; 3, ground; 4, circular base; 5, annular space; 6, center column; 7, arc-shaped steam seal block; 8, total drive motor; 9, rotating disk; 10, horizontal electric cylinder; 11, steel sleeve; 12, screw; 13, outer end support seat; 14, support ball; 15, support frame; 1501, upper horizontal section; 16, center column; 17, cutting motor; 18, cutting tool; 19, center disk; 20, adjusting ring; 21, top pressure stud; 22, positioning disk; 23, clamping electric cylinder; 24, friction clamping disk. DETAILED DESCRIPTION

[0024] The following is a detailed description of the embodiments of the technical solution of the utility model in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the scope of protection of the utility model. The specific structure of the utility model is as follows Figure 1-Figure 3 as shown in .

[0025] Embodiment 1: A steam seal back-arc cutting device comprises a horizontally arranged annular seat 1, a plurality of ground-connected columns 2 are arranged at the bottom of the annular seat 1, the bottom of each of the ground-connected columns 2 is fixed on the ground 3, a circular base 4 is fixed at the top center of the annular seat 1, an annular driving mechanism is fixedly installed in the annular space 5 at the bottom of the circular base 4, a back-arc cutting mechanism is fixedly installed at the output end of the annular driving mechanism, a central column 6 coaxially arranged with the inner end of the annular driving mechanism is fixedly installed at the top center of the circular base 4, a centering component is coaxially sleeved on the periphery of the central column 6, an arc-shaped steam seal block 7 to be cut is placed abuttingly on the outer side wall of the centering component, the bottom of the arc-shaped steam seal block 7 is supported on the top of the circular base 4, a pressing tool is installed on the upper outer side wall of the central column 6, and the bottom of the pressing tool is used to press the top of the arc-shaped steam seal block 7 tightly.

[0026] When the steam seal back arc cutting device in the utility model processes the arc-shaped steam seal block 7, it relies on the installation of a matching centering component to realize the center positioning of the arc-shaped steam seal block 7. After the positioning is completed, it is tightly positioned by a pressing tool to ensure the firmness of the positioning of the entire arc-shaped steam seal block 7. When it is necessary to cut the arc-shaped steam seal block 7 after clamping and positioning, the annular drive mechanism is controlled to adjust, thereby driving the back arc cutting mechanism at its upper end to shift in the horizontal direction.

[0027] Finally, the cutting tool 18 of the back arc cutting mechanism is brought into contact with the back arc surface of the arc-shaped steam sealing block 7, and cutting is achieved by controlling the start of the back arc cutting mechanism. During the cutting process, the back arc surface of the arc-shaped steam sealing block 7 is cut by controlling the operation of the annular driving mechanism.

[0028] In any of the above schemes, it is preferred that the annular drive mechanism includes a total drive motor 8 fixedly mounted on the central bottom of the circular base 4 and coaxially and vertically arranged therewith, a rotating disk 9 is fixedly mounted on the motor shaft of the total drive motor 8, a horizontal electric cylinder 10 is bolted and fixed on the outer side wall of one side of the rotating disk 9, and a steel sleeve 11 is fixedly mounted on the outer end of the piston rod of the horizontal electric cylinder 10, and the steel sleeve 11 is used to be sleeved on the outer side wall of the lower end of the back arc cutting mechanism and locked and fixed by screws 12.

[0029] When the annular drive mechanism designed in the utility model is working, it can drive the swing of the horizontal electric cylinder 10 connected to its lower end through the fixed-axis rotation of the total drive motor 8. When the horizontal electric cylinder 10 swings, it can drive the steel sleeve 11 and the back-arc cutting mechanism installed on the steel sleeve 11 to follow it to perform circular or arc motion, so as to rely on the cutting motor 17 and the cutting tool 18 at the working end of the back-arc cutting mechanism to complete the rapid cutting process, thereby ensuring the accurate processing of the back-arc surface of the arc-shaped steam seal block 7.

[0030] In any of the above schemes, preferably, an outer end support seat 13 is fixedly mounted on the outer side wall of the outer end of the cylinder barrel of the horizontal electric cylinder 10, and a support ball 14 movably supported on the ground 3 is mounted at the bottom of the outer end support seat 13.

[0031] It should be noted that when the main drive motor 8 drives the horizontal electric cylinder 10 to rotate, the entire horizontal electric cylinder 10 can be supported by relying on the supporting effect of the outer end support seat 13 and the supporting balls 14 on the ground 3, effectively ensuring the stability of the overall support of the horizontal electric cylinder 10 during the rotation process.

[0032] In any of the above schemes, it is preferred that the back-arc cutting mechanism includes a support frame 15 fixedly inserted in the steel sleeve 11, the upper horizontal section 1501 of the support frame 15 is arranged toward the side of the central column 6, and a cutting end motor frame 16 is fixedly installed on the upper end of the support frame 15, and a vertically arranged cutting motor 17 is fixedly installed on the cutting end motor frame 16, and a cutting tool 18 is installed on the motor shaft of the cutting motor 17, and the cutting tool 18 is used to complete the back-arc cutting processing of the arc-shaped steam seal block 7.

[0033] When the back-arc cutting mechanism is driven by the rotation of the main drive motor 8, it can follow and rotate along the back-arc surface of the arc-shaped steam sealing block 7. During the rotation, since the cutting motor 17 is in a rotating state, when the cutting motor 17 drives the cutting tool 18 to rotate, the back-arc surface of the arc-shaped steam sealing block 7 can be quickly cut.

[0034] Embodiment 2: Compared with Embodiment 1, this embodiment is different in that it also includes the following technical features:

[0035] In any of the above schemes, it is preferred that the centering assembly includes a center disk 19 vertically sleeved on the outer wall of the center column 6, and an adjusting ring 20 is coaxially sleeved on the outer wall of the center disk 19. The outer diameter of the adjusting ring 20 is customized as required and forms a standard part for processing. A top pressure stud 21 is bolted and fixedly installed on the top of the center disk 19 on the side away from the arc-shaped steam seal block 7, and the top of the top pressure stud 21 is flush with the top of the current arc-shaped steam seal block 7.

[0036] The function of the centering component installed here is to rely on the center disk 19 to complete the outward expansion. When the center disk 19 cannot reach the inner diameter abutment size of the current arc-shaped steam seal block 7, it relies on selecting the adjustment ring 20 with appropriate inner diameter and outer diameter sizes to complete the abutment with the inner wall of the current arc-shaped steam seal block 7. The outer wall of the adjusting ring 20 is abutted against the arc-shaped steam seal block 7 to achieve the center positioning of the arc-shaped steam seal block 7 in place. After the center positioning, the arc-shaped steam seal block 7 is kept pressed inward, and then the abutment positioning of the entire arc-shaped steam seal block 7 is achieved by cooperating with the work of the abutting tooling.

[0037] In any of the above schemes, it is preferred that the pressing tooling includes a positioning plate 22 bolted to the top of the central column 6, a plurality of clamping electric cylinders 23 are fixed at even intervals along the circumference of the bottom of the positioning plate 22, and a friction pressing plate 24 is sleeved on the outer wall of the central column 6 below each of the clamping electric cylinders 23, and the bottom of the friction pressing plate 24 is pressed against the top of the arc-shaped steam seal block 7.

[0038] The pressing tool uses a positioning plate 22 to keep the top in position when working. When the arc-shaped steam seal block 7 needs to be pressed and positioned, each clamping electric cylinder 23 is used to press the friction pressing plate 24 downward, ultimately achieving the purpose of pressing the friction pressing plate 24 against the top of the arc-shaped steam seal block 7 below it and the top of the pressing stud 21.

[0039] In any of the above solutions, it is preferred that the lower outer side wall of the total drive motor 8 is fixed to the inner side wall of the annular space 5 through the total drive motor 8 frame.

[0040] When installing the main drive motor 8, a main drive motor 8 frame is used to complete further positioning and installation, thereby achieving the purpose of stably controlling the positioning of the main drive motor 8.

[0041] In any of the above solutions, it is preferred that the outer diameter of the friction plate 24 is smaller than the outer side wall of the arc-shaped steam seal block 7 .

[0042] The outer diameter of the friction plate 24 is smaller than the outer diameter of the arc-shaped steam seal block 7, which can effectively ensure that no motion interference occurs when the back arc surface of the arc-shaped steam seal block 7 is processed.

[0043] In any of the above solutions, it is preferred that an anti-slip pattern is provided on the bottom of the friction plate 24 .

[0044] The added anti-skid pattern can ensure the stability of the arc-shaped steam sealing block 7 when the arc-shaped steam sealing block 7 is pressed and positioned, and effectively reduce the probability of displacement of the arc-shaped steam sealing block 7 after clamping and positioning.

[0045] Specific working principle: When the device is processing the arc-shaped steam seal block 7, the center of the arc-shaped steam seal block 7 is positioned by installing a matching centering component.

[0046] After the positioning is completed, the pressing tool is used to press the positioning to ensure the firmness of the positioning of the entire arc-shaped steam sealing block 7. When it is necessary to cut the arc-shaped steam sealing block 7 after clamping and positioning, the annular drive mechanism is controlled to adjust, thereby driving the back arc cutting mechanism at its upper end to shift in the horizontal direction; so that the cutting tool 18 of the back arc cutting mechanism is abutted against the back arc surface of the arc-shaped steam sealing block 7, and the cutting is achieved by controlling the start of the back arc cutting mechanism. During the cutting process, the back arc surface of the arc-shaped steam sealing block 7 is cut by controlling the operation of the annular drive mechanism.

[0047] From the above, it can be seen that when adjusting the back arc surface of the arc-shaped steam seal block 7, the centering component can be used to effectively position the center of the current arc-shaped steam seal block 7, and after the positioning is completed, the pressing tool can be used to quickly complete the tight positioning, ensuring the positioning of the center of the circle and the rapid positioning of the entire arc-shaped steam seal block 7, thereby ensuring the accuracy of the subsequent arc-shaped steam seal block 7 processing; when the back arc of the arc-shaped steam seal block 7 in the positioned state is repaired and processed, the annular drive mechanism can be used to adjust the overall position of the back arc cutting mechanism to ensure that the cutting tool 18 of the back arc cutting mechanism can be abutted against the back arc surface of the arc-shaped steam seal block 7 according to the set size; when the back arc surface of the arc-shaped steam seal block 7 needs to be processed, the fixed axis rotation of the total drive motor 8 of the annular drive mechanism can drive the outer end of the horizontal electric cylinder 10 installed thereon to drive the back arc cutting mechanism to swing along the sizing circle, thereby completing the rapid processing of the back arc surface of the current arc-shaped steam seal block 7.

[0048] The above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model. For technicians in this technical field, any replacement improvements or changes made to the implementation methods of the utility model fall within the protection scope of the utility model.

[0049] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. Steam seal back arc cutting device, characterized by: It comprises a horizontally arranged annular seat, at the bottom of which a plurality of ground-connected columns are arranged, the bottom of each of the ground-connected columns is fixed on the ground, a circular base is fixed at the top center of the annular seat, an annular driving mechanism is fixedly installed in the annular space at the bottom of the circular base, a back-arc cutting mechanism is fixedly installed at the output end of the annular driving mechanism, a central column coaxially arranged with the inner end of the annular driving mechanism is fixedly installed at the top center of the circular base, a centering component is coaxially sleeved on the periphery of the central column, an arc-shaped steam sealing block to be cut is placed against the outer side wall of the centering component, the bottom of the arc-shaped steam sealing block is supported on the top of the circular base, a pressing tool is installed on the upper outer side wall of the central column, and the bottom of the pressing tool is used to press against the top of the arc-shaped steam sealing block.

2. The steam seal back arc cutting device according to claim 1, characterized in that: The annular driving mechanism includes a main driving motor which is fixedly mounted on the central bottom of the circular base and is coaxially and vertically arranged therewith, a rotating disk is fixedly mounted on the motor shaft of the main driving motor, a horizontal electric cylinder is bolted and fixed on the outer side wall of one side of the rotating disk, a steel sleeve is fixedly mounted on the outer end of the piston rod of the horizontal electric cylinder, and the steel sleeve is used to be sleeved on the outer side wall of the lower end of the back arc cutting mechanism and is fixed by screws.

3. The steam seal back arc cutting device according to claim 2, characterized in that: An outer end support seat is fixedly mounted on the outer side wall of the outer end of the cylinder barrel of the horizontal electric cylinder, and a support ball movably supported on the ground is mounted on the bottom of the outer end support seat.

4. The steam seal back arc cutting device according to claim 3, characterized in that: The back-arc cutting mechanism includes a supporting frame fixedly inserted in the steel sleeve, the upper horizontal section of the supporting frame is arranged toward one side of the central column, a cutting end motor frame is fixedly installed on the upper end of the supporting frame, a vertically arranged cutting motor is fixedly installed on the cutting end motor frame, and a cutting tool is installed on the motor shaft of the cutting motor, and the cutting tool is used to complete the back-arc cutting process of the arc-shaped steam seal block.

5. The steam seal back arc cutting device according to claim 4, characterized in that: The centering assembly includes a center disk vertically sleeved on the outer wall of the center column, an adjustment ring coaxially sleeved on the outer wall of the center disk, the outer diameter of the adjustment ring is processed as required, and a top pressure stud is bolted and fixedly installed on the top of the center disk away from the side of the arc-shaped steam seal block, and the top of the top pressure stud is flush with the top of the current arc-shaped steam seal block.

6. The steam seal back arc cutting device according to claim 5, characterized in that: The pressing tooling includes a positioning plate bolted to the top of the central column, a plurality of clamping electric cylinders are fixed at even intervals along the circumference of the bottom of the positioning plate, a friction pressing plate is sleeved on the outer wall of the central column below each of the clamping electric cylinders, and the bottom of the friction pressing plate is pressed against the top of the arc-shaped steam seal block.

7. The steam seal back arc cutting device according to claim 6, characterized in that: The lower outer side wall of the main drive motor is fixed to the inner side wall of the annular space through the main drive motor frame.

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