A positioning tool for a steam extraction check valve

Abstract

The utility model relates to a kind of positioning tool for steam extraction check valve.It solves the problem of poor installation stability and installation flexibility of conventional steam extraction check valve in prior art.It includes the positioning channel steel setting at bottom, symmetrically setting sliding adjustment support in positioning channel steel, and the positioning horizontal pole of being horizontally arranged is connected through the telescopic rod structure of being vertically arranged between sliding adjustment support, adjusting drive mechanism for driving telescopic rod structure to expand and contract to adjust the height of positioning horizontal pole between sliding adjustment support and telescopic rod structure, and a plurality of threaded connection seat components for passing through fixed bolt are adjustably arranged on positioning horizontal pole.The utility model has the advantages of effectively improving the installation stability and height adjustment flexibility of check valve, realizing a pair of clamp corresponding to multiple products, greatly reducing the waste of manpower and material resources.

Description

Technical Field

[0001] This utility model relates to the field of mechanical equipment technology, specifically to a positioning fixture for a steam extraction check valve. Background Technology

[0002] The main structure of the steam turbine extraction check valve consists of a check valve rotating shaft, a check valve feedback device bracket, a universal joint, and a feedback device junction box. One end of the check valve rotating shaft is connected to the universal joint and tightened by the internal hex screws on the universal joint. The other end of the universal joint is connected to the input rotating shaft of the check valve feedback device. The feedback device converts the rotation angle of the rotating shaft into an electrical signal and feeds it back to the DCS.

[0003] The non-return valve's rotating shaft has a short extension, and the universal joint is tightened at both ends with small Allen screws. Due to the limited space in the feedback device bracket, the installation and maintenance of the universal joint are difficult. Furthermore, the small size of the Allen screws at both ends of the universal joint makes it prone to loosening during unit startup under vibration and significant temperature changes. In addition, traditional installation of extraction steam non-return valves involves fixing them to the workbench using wooden V-blocks and wood. This method of fixing is unstable, and for larger extraction steam non-return valves with longer cylinders, the installation height is often insufficient, requiring the workbench to be raised, making it inconvenient to use.

[0004] To address the shortcomings of existing technologies, people have conducted long-term explorations and proposed various solutions. For example, Chinese patent literature discloses an installation structure for a valve position feedback device of a steam turbine extraction check valve [CN202121831758.1], which includes a U-shaped bracket, a metal tube, hexagonal screws, and nuts. The U-shaped bracket is installed between the check valve and the feedback device, and the metal tube is installed inside the U-shaped bracket. Holes are drilled at both ends of the metal tube, which is connected to the rotating shaft of the check valve and the positioner of the feedback device through hexagonal screws and nuts, respectively.

[0005] The above solution has solved to some extent the problems of difficult installation and maintenance of the universal joint of the steam extraction check valve and its easy loosening in the existing technology. However, the solution still has many shortcomings, such as poor installation stability and flexibility of the traditional steam extraction check valve. Summary of the Invention

[0006] The purpose of this invention is to address the above-mentioned problems by providing a positioning fixture for a steam extraction check valve.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a positioning fixture for a steam extraction check valve, comprising a positioning channel steel at the bottom, symmetrically arranged sliding adjustment brackets within the positioning channel steel, the sliding adjustment brackets being connected to a horizontally arranged positioning crossbar via a vertically arranged telescopic rod structure, an adjustment drive mechanism between the sliding adjustment brackets and the telescopic rod structure for driving the telescopic rod structure to extend and retract to adjust the height of the positioning crossbar, and a plurality of threaded connection seat assemblies for inserting fixing bolts being adjustablely arranged on the positioning crossbar.

[0008] In the aforementioned positioning fixture for a steam extraction check valve, a strip-shaped adjustment channel is provided on the positioning crossbar, and a sliding connection part is provided in the adjustment channel. The two ends of the positioning crossbar are slidably connected to the sliding adjustment bracket.

[0009] In the aforementioned positioning fixture for a steam extraction check valve, the threaded connection seat assembly includes symmetrically arranged sliding connection frames. A threaded connection channel is provided between the axes of the sliding connection frames, through which a fixing bolt can pass and form a fixed connection. A strip-shaped adjustment hole is provided on the sliding connection frame and on both the upper and lower sides of the threaded connection channel, and a locking screw is provided in the strip-shaped adjustment hole.

[0010] In the aforementioned positioning fixture for a steam extraction check valve, a locking channel is provided on the sliding connection part for inserting a locking screw, and a threaded connection channel passes through the adjustment channel. The diameter of the sliding connection frame is larger than the diameter of the adjustment channel.

[0011] In the aforementioned positioning fixture for a steam extraction check valve, the telescopic rod structure includes a lower positioning cylinder seat. The upper end of the lower positioning cylinder seat is connected to an upper support rod via a telescopic connecting rod. The top end of the upper support rod is connected to the bottom of the positioning crossbar to form a support, and the bottom of the lower positioning cylinder seat is connected to the positioning channel steel via a fixing screw.

[0012] In the aforementioned positioning fixture for a steam extraction check valve, the adjusting drive mechanism includes an inclined sliding support rod, the bottom of which is slidably connected to a positioning channel steel, and the top of which is rotatably connected to a horizontally arranged linkage support rod.

[0013] In the aforementioned positioning fixture for a steam extraction check valve, one end of the linkage rod is connected to the upper support rod, and the other end is slidably disposed in a groove on the inner wall of the sliding adjustment bracket. The outer wall of the sliding adjustment bracket is provided with a strip-shaped guide hole that communicates with the groove, and a sliding positioning shaft for connecting the linkage rod and the sliding rod is inserted into the strip-shaped guide hole.

[0014] In the aforementioned positioning fixture for a steam extraction check valve, a strip-shaped adjustment groove is provided on the outer wall of the positioning channel steel, and the bottom of the sliding support rod is adjustable in the strip-shaped adjustment groove by adjusting the positioning screw.

[0015] In the aforementioned positioning fixture for a steam extraction check valve, the bottom of the sliding adjustment bracket is locked and positioned with the positioning channel steel by locking bolts.

[0016] In the aforementioned positioning fixture for a steam extraction check valve, the two ends of the positioning channel steel are provided with fixing bolts for connecting to the outside.

[0017] Compared with the prior art, the advantages of this utility model are as follows: The positioning channel steel at the bottom, together with the fixed connecting bolts at both ends, lays a stable foundation. The sliding adjustment bracket is adjusted and locked through locking bolts, telescopic rod structure, and threaded connection seat assembly. Moreover, the telescopic rod and the positioning crossbar form a rigid support structure, preventing overall displacement and component loosening. Secondly, the sliding adjustment bracket can adjust the spacing laterally within the positioning channel steel to adapt to the width of the check valve. The adjustment drive mechanism, together with the telescopic rod, can accurately adjust the height of the positioning crossbar. The strip-shaped adjustment channel of the positioning crossbar and the strip-shaped adjustment hole of the threaded connection seat can flexibly adjust the position of the fixed point and make small fine adjustments. It can adapt to different specifications of check valves and complex installation scenarios without changing tooling, effectively improving the installation stability and height adjustment flexibility of the check valve. It realizes that one fixture can correspond to multiple products, greatly reducing the waste of manpower and material resources. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a partial structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the sliding connecting frame structure in this utility model; Figure 4 This is a cross-sectional view of the sliding connecting frame in this utility model; Figure 5 This is a side view of the present invention; Figure 6 yes Figure 6 Enlarged view of the structure at point A in the image; In the diagram: 1. Positioning channel steel; 11. Strip-shaped adjustment groove; 12. Adjusting positioning screw; 13. Locking bolt; 14. Fixed connecting bolt; 2. Sliding adjustment bracket; 21. Slide groove; 22. Strip-shaped guide hole; 23. Sliding positioning shaft; 3. Telescopic rod structure; 31. Lower positioning cylinder seat; 32. Telescopic connecting rod; 33. Upper support rod; 34. Fixed screw; 4. Positioning crossbar; 41. Adjustment channel; 42. Sliding connection part; 43. Locking channel; 5. Adjustment drive mechanism; 51. Sliding support rod; 52. Linkage support rod; 6. Threaded connection seat assembly; 61. Sliding connection frame; 62. Threaded connection channel; 63. Strip-shaped adjustment hole; 64. Locking screw. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] like Figure 1-6 As shown, a positioning fixture for a steam extraction check valve includes a positioning channel steel 1 at the bottom, with sliding adjustment brackets 2 symmetrically arranged inside the positioning channel steel 1. The sliding adjustment brackets 2 are connected to each other by a vertically arranged telescopic rod structure 3 and a horizontally arranged positioning crossbar 4. An adjustment drive mechanism 5 is provided between the sliding adjustment brackets 2 and the telescopic rod structure 3 to drive the telescopic rod structure 3 to extend and retract, thereby adjusting the height of the positioning crossbar 4. Several threaded connection seat assemblies 6 for threading fixing bolts are adjustablely arranged on the positioning crossbar 4.

[0021] The positioning crossbar 4 is provided with a strip-shaped adjustment channel 41, and a sliding connection part 42 is provided in the adjustment channel 41. The two ends of the positioning crossbar 4 are slidably connected to the sliding adjustment bracket 2.

[0022] The inner wall of the sliding adjustment bracket 2 here can be provided with a height limiting groove for the positioning crossbar 4 to slide. By adjusting the height of the positioning crossbar 4, the height of the steam extraction check valve can be adjusted.

[0023] As can be seen, the threaded connection seat assembly 6 includes a symmetrically arranged sliding connection frame 61. A threaded connection channel 62 is provided between the axes of the sliding connection frame 61, through which a fixing bolt can pass and form a fixed connection. A strip-shaped adjustment hole 63 is provided on the sliding connection frame 61 and on the upper and lower sides of the threaded connection channel 62. A locking screw 64 is provided in the strip-shaped adjustment hole 63.

[0024] The sliding connecting bracket 61 can slide within the adjusting channel 41 to adjust the horizontal position of the extraction steam check valve after connection. The threaded connecting channel 62 uses connecting fixing bolts to position the flange of the extraction steam check valve.

[0025] The strip-shaped adjustment hole 63 and the locking screw 64 are used for fine-tuning the height position of each extraction steam check valve after the height is fixed.

[0026] Furthermore, the sliding connection part 42 is provided with a locking channel 43 into which the locking screw 64 can be inserted, the threaded connection channel 62 passes through the adjustment channel 41, and the diameter of the sliding connection bracket 61 is larger than the diameter of the adjustment channel 41.

[0027] Specifically, the telescopic rod structure 3 includes a lower positioning cylinder seat 31. The upper end of the lower positioning cylinder seat 31 is connected to an upper support rod 33 via a telescopic connecting rod 32. The top end of the upper support rod 33 is connected to the bottom of the positioning crossbar 4 to form a support, and the bottom of the lower positioning cylinder seat 31 is connected to the positioning channel steel 1 via a fixing screw 34.

[0028] The telescopic rod structure 3 is mainly used for passive extension and retraction, thereby controlling the height of the positioning crossbar 4.

[0029] Furthermore, the adjustment drive mechanism 5 includes an inclined sliding support rod 51, the bottom of which is slidably connected to the positioning channel steel 1, and the top of which is rotatably connected to a horizontally arranged linkage support rod 52.

[0030] More specifically, one end of the linkage rod 52 is connected to the upper support rod 33 and the other end is slidably disposed in the groove 21 on the inner wall of the sliding adjustment bracket 2. The outer wall of the sliding adjustment bracket 2 is provided with a strip-shaped guide hole 22 that communicates with the groove 21, and a sliding positioning shaft 23 for connecting the linkage rod 52 and the sliding rod 51 is inserted into the strip-shaped guide hole 22.

[0031] By moving the bottom of the sliding support rod 51, one end of the linkage support rod 52 is subjected to force and raised or lowered, thereby driving the upper support rod 33 to rise or fall, thus achieving height adjustment. After adjustment, the positioning screw 12 is adjusted to achieve fixation.

[0032] In detail, the outer wall of the positioning channel steel 1 is provided with a strip-shaped adjustment groove 11, and the bottom of the sliding support rod 51 is adjustable and positioned within the strip-shaped adjustment groove 11 by means of the adjusting positioning screw 12.

[0033] Preferably, the bottom of the sliding adjustment bracket 2 is locked and positioned with the positioning channel steel 1 by locking bolts 13.

[0034] In addition, the two ends of the positioning channel steel 1 are provided with fixing bolts 14 for connecting to the outside.

[0035] In summary, the principle of this embodiment is as follows: Before installing the steam extraction check valve, a positioning fixture is set on the flanges on both sides of the steam extraction check valve. The holes on the flanges on both sides of the steam extraction check valve are used as auxiliary holes for alignment. The corresponding fixing bolts are inserted into the threaded connection channel 62 for matching and fixing. The sliding connecting bracket 61 is adjusted laterally to adjust the position of the adjustment channel 41 to achieve the adjustment of the horizontal position of the steam extraction check valve. After the adjustment is completed, the locking screw 64 is used to lock and fix it. When adjusting the height, the sliding support rod 51 is adjusted to move the sliding support rod 51 up and down, thereby controlling the upper support rod 33 to drive the positioning crossbar 4 to move up and down in linkage, thereby achieving the adjustment of the height of the steam extraction check valve. After the adjustment is completed, the positioning screw 12 is adjusted to lock and fix it, thereby achieving the fixation of the height.

[0036] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0037] Although this document frequently uses terms such as positioning channel steel 1, strip-shaped adjustment groove 11, adjusting positioning screw 12, locking bolt 13, fixed connecting bolt 14, sliding adjustment bracket 2, slide groove 21, strip-shaped guide hole 22, sliding positioning rotating shaft 23, telescopic rod structure 3, lower positioning cylinder seat 31, telescopic connecting rod 32, upper support rod 33, fixed screw 34, positioning crossbar 4, adjusting channel 41, sliding connection part 42, locking channel 43, adjusting drive mechanism 5, sliding support rod 51, threaded connection seat assembly 6, sliding connection frame 61, threaded connection channel 62, strip-shaped adjustment hole 63, and locking screw 64, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A positioning fixture for a steam extraction check valve, comprising a positioning channel steel (1) disposed at the bottom, wherein sliding adjusting brackets (2) are symmetrically arranged within the positioning channel steel (1), characterized in that, The sliding adjustment brackets (2) are connected by a vertically arranged telescopic rod structure (3) and a horizontally arranged positioning crossbar (4). The sliding adjustment brackets (2) and the telescopic rod structure (3) are connected by an adjustment drive mechanism (5) for driving the telescopic rod structure (3) to extend and retract, thereby adjusting the height of the positioning crossbar (4). The positioning crossbar (4) is adjustablely provided with several threaded connection seat assemblies (6) for passing through fixing bolts.

2. The positioning fixture for a steam extraction check valve according to claim 1, characterized in that, The positioning crossbar (4) is provided with a strip-shaped adjustment channel (41), and a sliding connection part (42) is provided in the adjustment channel (41). The two ends of the positioning crossbar (4) are slidably connected to the sliding adjustment bracket (2).

3. A positioning fixture for a steam extraction check valve according to claim 2, characterized in that, The threaded connection seat assembly (6) includes a sliding connection frame (61) arranged symmetrically. A threaded connection channel (62) is provided between the axes of the sliding connection frame (61) for a fixing bolt to pass through and form a fixed connection. A strip-shaped adjustment hole (63) is provided on the sliding connection frame (61) and on the upper and lower sides of the threaded connection channel (62). A locking screw (64) is provided in the strip-shaped adjustment hole (63).

4. A positioning fixture for a steam extraction check valve according to claim 3, characterized in that, The sliding connection part (42) is provided with a locking channel (43) into which the locking screw (64) can be inserted. The threaded connection channel (62) passes through the adjustment channel (41). The diameter of the sliding connection frame (61) is larger than the diameter of the adjustment channel (41).

5. A positioning fixture for a steam extraction check valve according to claim 1, characterized in that, The telescopic rod structure (3) includes a lower positioning cylinder seat (31). The upper end of the lower positioning cylinder seat (31) is connected to an upper support rod (33) via a telescopic connecting rod (32). The top end of the upper support rod (33) is connected to the bottom of the positioning crossbar (4) to form a support. The bottom of the lower positioning cylinder seat (31) is connected to the positioning channel steel (1) via a fixing screw (34).

6. A positioning fixture for a steam extraction check valve according to claim 5, characterized in that, The adjustment drive mechanism (5) includes a sliding support rod (51) that is inclined. The bottom of the sliding support rod (51) is slidably connected to the positioning channel steel (1), and the top of the sliding support rod (51) is rotatably connected to a horizontally arranged linkage support rod (52).

7. A positioning fixture for a steam extraction check valve according to claim 6, characterized in that, One end of the linkage rod (52) is connected to the upper support rod (33) and the other end is slidably disposed in the groove (21) on the inner wall of the sliding adjustment bracket (2). The outer wall of the sliding adjustment bracket (2) is provided with a strip-shaped guide hole (22) that communicates with the groove (21), and a sliding positioning shaft (23) for connecting the linkage rod (52) and the sliding rod (51) is inserted into the strip-shaped guide hole (22).

8. A positioning fixture for a steam extraction check valve according to claim 6, characterized in that, The outer wall of the positioning channel steel (1) is provided with a strip-shaped adjustment groove (11), and the bottom of the sliding support rod (51) is adjustable in the strip-shaped adjustment groove (11) by adjusting the positioning screw (12).

9. A positioning fixture for a steam extraction check valve according to claim 1, characterized in that, The bottom of the sliding adjustment bracket (2) is locked and positioned with the positioning channel steel (1) by locking bolts (13).

10. A positioning fixture for a steam extraction check valve according to claim 9, characterized in that, The positioning channel steel (1) is provided with fixing bolts (14) at both ends for connecting to the outside.

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