Turbine valve shell abutting limiting tool

Abstract

The utility model discloses a steam turbine valve shell abutting limiting tool, and relates to the field of machining workpieces, the steam turbine valve shell abutting limiting tool comprises a bottom plate and positioning strips, a plurality of positioning grooves are formed in the bottom plate, and the positioning strips are inserted into the positioning grooves; the base is arranged on the bottom plate, and a fixing structure used for fixing the base to the positioning strip is arranged on the base; the base is further connected with an abutting block in a sliding mode, and the base is further provided with an abutting structure used for driving the abutting block to slide towards the steam turbine valve shell. The multiple protruding parts at different positions on the steam turbine valve shell are supported in an abutting mode, limiting of the steam turbine valve shell is achieved, and shaking of the steam turbine valve shell during inner wall machining is avoided as much as possible.

Description

Technical Field

[0001] The present application relates to the field of mechanical processing of workpieces, and in particular to a turbine valve casing abutment limiting tooling. Background Art

[0002] Steam turbine valves include valve structures in steam turbines such as main steam valves and regulating valves. Steam turbine valve housings are the outer shells of various steam turbine valve bodies. When the steam turbine valve body is connected to other equipment, connecting pipes are reserved, so the surface of the steam turbine valve housing has corresponding protrusions of different heights.

[0003] Multiple protrusions at different positions make it difficult to stably place the turbine valve casing on the support platform during inner wall processing, thereby affecting the working efficiency of the inner wall processing.

[0004] Furthermore, since some protrusions are located relatively low, the interval between the protrusions and the supporting platform is small, and the protrusions are closed shells, it is difficult to support and limit such protrusions to enhance the stability of the turbine valve casing during placement. Utility Model Content

[0005] In order to support a protruding portion at a lower position in a steam turbine valve casing, the present application provides a steam turbine valve casing abutment limiting tool.

[0006] The present application provides a steam turbine valve casing abutment limit fixture adopting the following technical solution:

[0007] A turbine valve casing abutment limit tooling includes a bottom plate and a positioning strip, wherein the bottom plate is provided with a plurality of positioning grooves, and the positioning strip is inserted into the positioning grooves; further comprising a base arranged on the bottom plate, wherein the base is provided with a fixing structure for fixing the base to the positioning strip; a clamping block is also slidably connected to the base, and the base is also provided with a clamping structure for driving the clamping block to slide toward the turbine valve casing.

[0008] By adopting the above technical scheme, the turbine valve casing is placed at the center of the bottom plate, and the positioning groove is used to preliminarily position the positioning strip and the base fixed to the positioning strip by the fixing structure, so that the base is located close to the protruding portion of the turbine valve casing. On this basis, the abutment block is driven to move toward the protruding portion through the abutment structure and abut against the end face of the protruding portion, thereby achieving abutment support for the lower protruding portion in the turbine valve casing in the horizontal direction. By abutting and supporting multiple protruding portions at different positions on the turbine valve casing, the turbine valve casing is limited, and shaking of the turbine valve casing during inner wall processing is avoided as much as possible.

[0009] Preferably, the fixing structure comprises a fixing screw rod passing through the base and the positioning bar in sequence, and a fixing nut threadedly connected to one end of the fixing screw rod close to the base.

[0010] By adopting the above technical solution, since the positioning groove limits the movement of the positioning strip in the direction of the bottom plate surface, after using the fixing screw to penetrate the base and the positioning strip in sequence, the base can be pressed against the positioning plate by rotating the fixing nut, thereby realizing the vertical fixation of the base and the positioning plate, and then fixing the base to the positioning groove on one side of the protrusion, so that the pressing block is driven to slide and press against and support the low-position protrusion of the turbine valve casing, thereby realizing the limitation of the turbine valve casing when processing the inner wall of the turbine valve casing.

[0011] Preferably, the clamping structure includes a threaded push rod connected to the base for rotation around its axial direction, the axial direction of the threaded push rod is the sliding direction of the clamping block, and the threaded push rod is threadedly connected to the clamping block; the clamping structure also includes a guide structure for moving the clamping block along the axial direction of the threaded push rod.

[0012] By adopting the above technical solution, the threaded push rod is rotated, and under the action of the guide structure, the clamping block threadedly connected to one end of the threaded push rod is restricted from rotating together with the threaded push rod, so that the clamping block can move along the axial direction of the threaded push rod and extend out of the base, thereby clamping and supporting the low-position protrusion of the turbine valve casing.

[0013] Preferably, the guide structure is a guide groove which is opened at the top of the base and is plug-fitted with the abutting block, and the abutting block is slidably connected to the base in the guide groove.

[0014] By adopting the above technical solution, the guide groove wall limits the rotation of the clamping block in the guide groove, so that after the threaded push rod is rotated, the clamping block can move axially along the threaded push rod to clamp and support the low-position protrusion of the turbine valve housing.

[0015] Preferably, the threaded push rod includes a threaded section threadedly connected to the clamping block and a small head fixed to one end of the threaded section away from the clamping block, and the rod diameter of the small head is smaller than the rod diameter of the threaded section; and a accommodating groove adapted to be plugged into the threaded push rod is provided on the bottom wall of the guide groove.

[0016] By adopting the above technical solution, the threaded push rod is contained in the receiving groove. Since the receiving groove is a semicircular groove adapted for plugging with the threaded push rod, the threaded push rod can be rotatably connected to the base at the receiving groove.

[0017] Preferably, at least one long groove is formed on the upper surface of the bottom plate, and the long groove extends from the edge of the bottom plate to the center of the bottom plate, and a slider slidably adapted to the long groove is fixedly connected to one end of the base close to the bottom plate.

[0018] By adopting the above technical scheme, the cooperation between the long groove and the slider can play a certain limiting role on the base. At the same time, when placing the turbine valve casing, the end face of the low-position protrusion of the valve casing is adjusted to the extension direction of the long groove, so that the clamping block can better fit the end face of the low-position protrusion after moving toward the turbine valve casing, thereby better abutting and limiting the turbine valve casing.

[0019] Preferably, two fixing screws are provided at both ends of the base in the width direction, and the connecting line of the two fixing screws is perpendicular to the sliding direction of the clamping block; and an avoidance groove for the positioning strip to pass through is provided on the sliding block.

[0020] By adopting the above technical solution, the setting of the two fixing nuts can make the connection between the base and the positioning strip more stable, thereby improving the stability of the abutment and limiting effect of the clamping block on the base on the turbine valve casing; at the same time, the setting of the two fixing nuts requires the positioning strip to be passed through the slider, so an avoidance groove for accommodating the positioning strip is opened on the slider.

[0021] Preferably, the bottom plate is provided with two limiting grooves on both sides of the long groove, the bottom plate is slidably connected with a connecting block in the limiting grooves, and one end of the fixing screw rod close to the positioning strip is fixedly connected to the connecting block.

[0022] By adopting the above technical solution, the fixing screw fixed to the connecting block can further strengthen the stability of the connection between the base and the positioning strip, thereby improving the stability of the abutment and limiting of the abutment block on the base against the turbine valve casing.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The positioning groove is used to preliminarily position the positioning strip and the base fixed to the positioning strip by the fixing structure, so that the base is located near the protruding portion of the steam turbine valve housing. On this basis, the abutting block is driven to move toward the protruding portion through the abutting structure and abuts against the end surface of the protruding portion, thereby realizing the abutting support of the lower protruding portion in the steam turbine valve housing in the horizontal direction. By abutting and supporting multiple protruding portions at different positions on the steam turbine valve housing, the position of the steam turbine valve housing is limited, and shaking of the steam turbine valve housing during inner wall processing is avoided as much as possible;

[0025] 2. With the help of the rotation of the threaded push rod, under the action of the guide structure, the abutment block threadedly connected to one end of the threaded push rod is restricted from rotating together with the threaded push rod, so that the abutment block can move along the axial direction of the threaded push rod and extend out of the base, abutting and supporting the low-position protrusion of the turbine valve housing;

[0026] 3. The base is pressed against the positioning plate by rotating the fixing nut, thereby realizing the vertical fixation of the base and the positioning plate, and then the base is fixed to the positioning groove on one side of the protrusion, so that the pressing block is driven to slide to press against and support the low-position protrusion of the turbine valve housing, thereby realizing the limitation of the turbine valve housing when processing the inner wall of the turbine valve housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is an axonometric diagram of the overall structure of the turbine valve housing abutment limiting tooling, which is mainly reflected in the embodiment of the present application;

[0028] Figure 2 This is a schematic diagram of the structure of the positioning bar mainly embodied in the embodiment of the present application;

[0029] Figure 3 This is a cross-sectional view of the fixing structure and the abutting structure mainly embodied in the embodiment of the present application;

[0030] Figure 4 for Figure 1 Enlarged schematic diagram of part A.

[0031] Figure numerals: 1, bottom plate; 11, positioning groove; 12, long groove; 13, limit groove; 14, connecting block; 2, positioning strip; 3, base; 31, slider; 4, fixing structure; 41, fixing screw; 42, fixing nut; 5, tightening block; 6, tightening structure; 61, threaded push rod; 62, guide groove; 63, accommodating groove. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-4 This application is described in further detail.

[0033] The present application embodiment discloses a steam turbine valve housing abutment limiter. Figure 1 The turbine valve housing abutment limiting tooling comprises a bottom plate 1 and a positioning strip 2. The bottom plate 1 is provided with a plurality of positioning grooves 11 which are plugged and matched with the positioning strip 2.

[0034] Optionally, the bottom plate 1 may be a circular plate, a square plate or a rectangular plate, etc. In this embodiment, the bottom plate 1 is a circular metal plate so as to support the turbine valve housing.

[0035] Combined with reference Figure 1 and Figure 2 The positioning groove 11 is a rectangular groove, the positioning strip 2 is in the shape of a long strip as a whole, and a rectangular protrusion that is plugged and matched with the positioning groove 11 is integrally formed on one side thereof close to the bottom plate 1, so that the positioning strip 2 can be plugged into the positioning groove 11.

[0036] A plurality of positioning grooves 11 can be spaced apart along the radial direction or arc direction of the bottom plate 1, so that when the low-position protrusion of the steam turbine valve housing is at any position of the bottom plate 1, the positioning groove 11 close to the low-position protrusion can be found to perform preliminary positioning of the positioning strip 2. In this embodiment, a plurality of positioning grooves 11 spaced apart along the radial direction of the bottom plate 1 is a group, and a plurality of groups of positioning grooves 11 are spaced apart around the bottom plate 1 axially.

[0037] Reference Figure 1 , a base 3 is also provided on the bottom plate 1, and a pressing block 5 for pressing against the low-position protrusion of the steam turbine valve housing is slidably connected to the base 3. After determining the appropriate positioning groove 11 according to the actual position of the low-position protrusion, insert the positioning strip 2 into the determined positioning groove 11, and then fix the base 3 on the positioning strip 2, the preliminary positioning and fixing of the base 3 can be achieved. After the base 3 is fixed to the positioning strip 2, the pressing block 5 is driven to move to achieve the abutment support of the low-position protrusion of the steam turbine valve housing, and then limit it when the inner wall of the steam turbine valve housing is processed.

[0038] Therefore, the base 3 is provided with a fixing structure 4 for fixing it to the positioning bar 2. Figure 3 and Figure 4 The fixing structure 4 includes a fixing screw 41 and a fixing nut 42, wherein the fixing screw 41 passes through the base 3 and the positioning strip 2 from the top of the base 3 downward in sequence and then abuts against the bottom plate 1, and the fixing nut 42 is threadedly connected to the end of the fixing screw 41 away from the positioning strip 2. By rotating the fixing nut 42, the base 3 can be driven to press down and press the positioning strip 2 against the bottom plate 1, thereby realizing the preliminary positioning of the base 3.

[0039] In order to make the initial positioning of the base 3 more stable, Figure 3 As shown, a slider 31 is fixedly connected to one side of the base 3 close to the bottom plate 1, and a long groove 12 is provided along the radial direction of the bottom plate 1 on the upper end surface of the bottom plate 1. The long groove 12 runs through the curved side wall of the bottom plate 1, and the slider 31 is slidably adapted to the long groove 12. The base 3 can only move radially along the bottom plate 1 on a horizontal plane through the cooperation restriction of the slider 31 and the long groove 12.

[0040] It should be noted that, refer to Figure 1 In this embodiment, a group of positioning grooves 11 corresponds to a long groove 12 , and each positioning groove 11 in a group of positioning grooves 11 is connected to the long groove 12 .

[0041] Furthermore, two fixing screws 41 located at both ends of the base 3 in the width direction form a group, and three groups of fixing screws 41 are arranged at intervals along the length direction of the base 3. Each time, the base 3 and the positioning bar 2 are fixed by a group of fixing screws 41 and a fixing nut 42 adapted thereto.

[0042] In this case, the positioning strip 2 also needs to extend through the slider 31 and be connected to the fixing screw 41 which is farther away from the positioning groove 11. Therefore, an avoidance groove is also provided at the lower end of the slider 31 for the positioning groove 11 to pass through, and the extension direction of the avoidance groove is the width direction of the pad.

[0043] At the same time, two T-shaped limit grooves 13 are formed on the bottom plate 1, and the extension direction of the limit grooves 13 is also the radial direction of the bottom plate 1, and the limit grooves 13 pass through the arc side wall of the bottom plate 1. A T-shaped connecting block 14 that is plugged and adapted to the limit groove 13 is slidably arranged, and the top end of the connecting block 14 is fixedly connected to the fixing screw 41, thereby limiting the movement of the fixing screw 41 in the height direction, and further improving the stability of the base 3 during the initial positioning.

[0044] During installation, first slide the connecting block 14 and the fixing screw 41 from the side wall of the bottom plate 1 into the limiting groove 13, then sequentially sleeve the positioning strip 2 and the base 3 onto the fixing screw 41, and finally rotate the fixing nut 42 to drive the base 3 to press against the bottom plate 1, thereby achieving preliminary fixation of the base 3.

[0045] At this time, the abutting block 5 can be driven to move to abut and support the valve housing of the steam turbine, thereby limiting the position of the valve housing of the steam turbine. Figure 4 A clamping structure 6 for driving the clamping block 5 to slide toward the turbine valve housing is provided on the base 3.

[0046] Specifically, the base 3 in this embodiment is roughly in the shape of a rectangular parallelepiped. After the base 3 is initially fixed, its length direction is the radial direction of the base plate 1. After the turbine valve housing is placed at the center position of the base plate 1, the turbine valve housing is adjusted so that the end face of its low-position protrusion faces the long groove 12. On this basis, the tightening block 5 slides toward the turbine valve housing along the length direction of the base 3, thereby realizing the abutment and limiting of the turbine valve housing.

[0047] Continue to refer to Figure 4 The abutment structure 6 in this embodiment includes a threaded push rod 61 rotatably connected to the base 3 around its axial direction, the axial direction of the threaded push rod 61 is parallel to the length direction of the base 3, and one end of the threaded push rod 61 close to the turbine valve housing is threadedly connected to the abutment block 5. The abutment structure 6 also includes a guide structure for moving the abutment block 5 along the axial direction of the threaded push rod 61.

[0048] The guide structure is a T-shaped guide groove 62 opened at the top of the base 3, and the pressing block 5 is a T-shaped block plugged and matched with the guide groove 62, so that the pressing block 5 can slide along the length direction of the base 3 under the restriction of the guide groove 62, but it is difficult to rotate around the length direction of the base 3. At this time, rotating the threaded push rod 61 can drive the pressing block 5 to move along the length direction of the base 3 and press against the turbine valve housing.

[0049] The threaded push rod 61 in this embodiment includes a threaded section connected to the abutting block 5 and a small head fixed to one end of the threaded section away from the abutting block 5. The small head is a round rod, and the rod diameter of the small head is smaller than the rod diameter of the threaded section. A receiving groove 63 is provided on the bottom wall of the guide groove 62 to be plugged and adapted to the threaded push rod 61. The receiving groove 63 is a semicircular groove to facilitate the rotation of the threaded push rod 61. The receiving groove 63 is T-shaped when viewed from above. The T-shaped receiving groove 63 wall further limits the movement of the threaded push rod 61 along the length direction of the base 3, so that the rotating threaded push rod 61 can stably drive the abutting block 5 to move along the length direction of the base 3.

[0050] Further, in order to facilitate the rotation of the threaded push rod 61, as shown Figure 4 As shown, the end wall of the small head of the threaded push rod 61 is also fixedly connected to a rectangular block, and the end surface of the rectangular block is provided with a hexagonal groove, which is convenient for driving the threaded push rod 61 to rotate manually or by rotating the hexagonal rod.

[0051] The implementation principle of a turbine valve casing abutment and limiting tooling in an embodiment of the present application is as follows: the positioning groove 11 is used to preliminarily position the positioning strip 2 and the base 3 fixed to the positioning strip 2 by the fixing screw 41 and the fixing nut 42, so that the base 3 is located close to the protruding portion of the turbine valve casing, and on this basis, the threaded push rod 61 is rotated to drive the clamping block 5 to move and abut against the end face of the protruding portion, thereby achieving abutment and support for the lower protruding portion in the turbine valve casing in the horizontal direction, and by abutting and supporting multiple protruding portions at different positions on the turbine valve casing, the turbine valve casing is limited, and shaking of the turbine valve casing during inner wall processing is avoided as much as possible.

[0052] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A steam turbine valve casing abutment limit fixture, characterized in that: The invention comprises a bottom plate (1) and a positioning strip (2), wherein the bottom plate (1) is provided with a plurality of positioning grooves (11), and the positioning strip (2) is plugged into the positioning grooves (11); the invention also comprises a base (3) arranged on the bottom plate (1), and the base (3) is provided with a fixing structure (4) for fixing the base (3) to the positioning strip (2); the base (3) is also slidably connected with a clamping block (5), and the base (3) is also provided with a clamping structure (6) for driving the clamping block (5) to slide toward the turbine valve housing.

2. A steam turbine valve casing abutment limiting tool according to claim 1, characterized in that: The fixing structure (4) comprises a fixing screw (41) which passes through the base (3) and the positioning strip (2) in sequence, and a fixing nut (42) which is threadedly connected to one end of the fixing screw (41) close to the base (3).

3. The steam turbine valve casing abutment limiting tool according to claim 1, characterized in that: The clamping structure (6) includes a threaded push rod (61) which is rotatably connected to the base (3) around its axial direction, the axial direction of the threaded push rod (61) is the sliding direction of the clamping block (5), and the threaded push rod (61) is threadedly connected to the clamping block (5); the clamping structure (6) also includes a guide structure for moving the clamping block (5) along the axial direction of the threaded push rod (61).

4. A steam turbine valve casing abutment limiting tool according to claim 3, characterized in that: The guide structure is a guide groove (62) opened at the top of the base (3) and plugged and matched with the abutment block (5); the abutment block (5) is slidably connected to the base (3) in the guide groove (62).

5. The steam turbine valve casing abutment limiting tool according to claim 4, characterized in that: The threaded push rod (61) comprises a threaded section threadedly connected to the clamping block (5) and a small head fixed to one end of the threaded section away from the clamping block (5), wherein the rod diameter of the small head is smaller than the rod diameter of the threaded section; and a receiving groove (63) adapted to be plugged into the threaded push rod (61) is provided on the bottom wall of the guide groove (62).

6. The turbine valve housing abutment limiting tool according to claim 2, characterized in that: The upper end surface of the bottom plate (1) is provided with at least one long groove (12), the long groove (12) extending from the edge of the bottom plate (1) to the center of the bottom plate (1), and a sliding block (31) slidably adapted to the long groove (12) is fixedly connected to one end of the base (3) close to the bottom plate (1).

7. A steam turbine valve casing abutment limiting tool according to claim 6, characterized in that: Two fixing screws (41) are provided at both ends of the base (3) in the width direction, and the connecting line of the two fixing screws (41) is perpendicular to the sliding direction of the abutting block (5); and an avoidance groove for the positioning strip (2) to pass through is provided on the sliding block (31).

8. The turbine valve housing abutment limiting tool according to claim 7, characterized in that: The bottom plate (1) is provided with two limiting grooves (13) on both sides of the long groove (12); the bottom plate (1) is slidably connected with a connecting block (14) in the limiting groove (13); and one end of the fixing screw (41) close to the positioning strip (2) is fixedly connected to the connecting block (14).

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