Adjusting device for adjusting bolt of main steam safety valve

Abstract

The utility model discloses a main steam safety valve adjusting bolt adjusting device which comprises a mounting plate and further comprises an adjusting mechanism, the top of the mounting plate is provided with the adjusting mechanism, the adjusting mechanism comprises a sliding groove, a vertical plate, a transverse plate, a hydraulic motor and a threaded sleeve, the top of the mounting plate is provided with the sliding groove, and the mounting plate is connected with the vertical plate in a sliding mode through the sliding groove. During adjustment, the mounting plate is mounted to the peripheral position of the main steam safety valve, the vertical plate slides along the sliding groove, so that the threaded sleeves located on the surfaces of the vertical plate and the transverse plate are in butt joint with the two sets of adjusting bolts on the surface of the steam safety valve, the threaded rods are tightened after butt joint to fix the position of the vertical plate, and then the hydraulic motor is controlled to operate; the hydraulic control assembly controls the hydraulic motor to operate according to the calculated adjustment square number, automatic adjustment of the steam safety valve is achieved, the manual workload is reduced, and meanwhile unnecessary damage, possibly caused by multiple times of adjustment, to the sealing face of the main steam safety valve is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of steam safety valve regulating components, and in particular to a main steam safety valve regulating bolt adjustment device. Background Technology

[0002] The safe and stable operation of a nuclear power plant relies on the protection of thousands of valves. The main steam is transported by two main steam pipelines, and each main steam header is equipped with four safety valves to protect the main steam pipeline in case of overpressure. Before each major overhaul shutdown and after reactor startup, the setting values ​​of the eight main steam safety valves are checked. If the setting pressure does not meet the design standards, the setting value needs to be adjusted and rechecked.

[0003] The existing steam safety valve adjustment and calibration procedures have the following drawbacks: The manual adjustment bolt adjustment device currently used on site is large in size and weight, and requires four workers to adjust it at the same time. Moreover, it cannot be adjusted in one go. If it is adjusted multiple times, it may cause unnecessary damage to the sealing surface of the main steam safety valve. In addition, the site environment is small and the temperature is high, which may cause heatstroke and other risks to workers during long-term work. Therefore, we propose a main steam safety valve adjustment bolt adjustment device. Utility Model Content

[0004] The main objective of this invention is to provide a main steam safety valve adjusting bolt adjustment device. By using the adjusting mechanism set on the top of the mounting plate, the operation of the hydraulic motor can be automatically adjusted by pre-setting the adjustment parameters, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A main steam safety valve adjusting bolt adjustment device includes a mounting plate and an adjusting mechanism. The adjusting mechanism is provided on the top of the mounting plate. The adjusting mechanism includes a slide groove, a vertical plate, a horizontal plate, a hydraulic motor, and a screw sleeve. The top of the mounting plate has a slide groove, and the mounting plate is slidably connected to the vertical plate through the slide groove. A horizontal plate is fixedly connected to one side of the surface of the vertical plate. A hydraulic motor is installed on both the surface of the horizontal plate and the surface of the vertical plate, and a screw sleeve is installed on the power output end of the hydraulic motor.

[0007] Furthermore, it also includes a positioning mechanism. A positioning mechanism is provided on one side of the mounting plate. The positioning mechanism includes a slot and an annular groove. One end of the mounting plate has a slot with the same outer diameter as the steam safety valve seat. The mounting plate has an annular groove on the outer periphery of the slot, corresponding to the position of the flange mating hole of the steam safety valve. When installing the mounting plate, the slot at its end is aligned with the outer periphery of the valve seat and inserted. After insertion, the angle of the mounting plate is adjusted so that the annular groove inside is aligned with the mating hole of the steam safety valve flange. Then, the mounting plate is lowered vertically so that the flange fastener is inserted into the annular groove. The position of the mounting plate is fixed by the cooperation of the annular groove and the fastener.

[0008] Furthermore, a slider located inside a groove is installed at the bottom of the vertical plate; through the cooperation of the groove and the slider, the vertical plate can be moved smoothly so that the screw sleeve is aligned with the bolt to be adjusted.

[0009] Furthermore, a fixing plate is fixedly connected to the top of the mounting plate near the vertical plate. A screw is screwed into the fixing plate, and the end of the screw abuts against the surface of the vertical plate. After the vertical plate is adjusted into place, tightening the screw so that its end abuts against the surface of the vertical plate can limit the position of the vertical plate.

[0010] Furthermore, each of the annular grooves has a hexagonal slot; the hexagonal slot facilitates the insertion of valve body flange fasteners and ensures a perfect fit.

[0011] Compared with the prior art, this utility model has the following advantages: Since the current main steam safety valve calibration device system can automatically calculate the required adjustment volume, or manually calculate it based on the main steam safety valve setting parameters, the required adjustment volume is determined before adjustment. The parameters are then input to the control terminal of the hydraulic motor, ensuring that the hydraulic motor's power terminal operates at the calculated volume. During adjustment, the mounting plate is installed on the outer periphery of the main steam safety valve, and the vertical plate slides along the groove, causing the threaded sleeves on the surfaces of the vertical and horizontal plates to engage with the two sets of adjusting bolts on the surface of the steam safety valve. After engagement, the bolts are tightened. The vertical plate is fixed in position, and then the hydraulic motor is controlled to run. The hydraulic control component controls the operation of the hydraulic motor according to the previously calculated adjustment number, realizing the automatic adjustment of the steam safety valve, reducing manual workload, and avoiding unnecessary damage to the sealing surface of the main steam safety valve that may be caused by multiple adjustments. When installing the mounting plate, align the slot at its end with the outer circumference of the valve seat and insert it. After insertion, adjust the angle of the mounting plate so that the annular groove inside it is aligned with the mating hole of the steam safety valve flange. Then, lower the mounting plate vertically so that the flange fastener is inserted into the annular groove. The position of the mounting plate is fixed by the cooperation of the annular groove and the fastener. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the adjusting bolt device for the main steam safety valve according to this utility model.

[0013] Figure 2 This is a schematic diagram of the adjusting mechanism of the adjusting bolt adjusting device for the main steam safety valve according to this utility model.

[0014] Figure 3 This is a schematic diagram of the positioning mechanism of the adjusting bolt device for the main steam safety valve according to this utility model.

[0015] In the diagram: 1. Mounting plate; 2. Adjustment mechanism; 201. Slide groove; 202. Vertical plate; 203. Slider; 204. Horizontal plate; 205. Hydraulic motor; 206. Screw sleeve; 207. Fixing plate; 208. Screw; 3. Positioning mechanism; 301. Slot; 302. Annular groove; 303. Hexagonal slot hole. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0017] like Figure 1-3 As shown, a main steam safety valve adjusting bolt adjustment device includes a mounting plate 1 and an adjusting mechanism 2. The adjusting mechanism 2 is provided on the top of the mounting plate 1. The adjusting mechanism 2 includes a slide groove 201, a vertical plate 202, a horizontal plate 204, a hydraulic motor 205, and a screw sleeve 206. The top of the mounting plate 1 has a slide groove 201, and the mounting plate 1 is slidably connected to the vertical plate 202 through the slide groove 201. The horizontal plate 204 is fixedly connected to one side of the surface of the vertical plate 202. The hydraulic motor 205 is installed on both the surface of the horizontal plate 204 and the surface of the vertical plate 202, and the power output end of the hydraulic motor 205 is installed with a screw sleeve 206.

[0018] The system also includes a positioning mechanism 3. The positioning mechanism 3 is provided on one side of the mounting plate 1. The positioning mechanism 3 includes a slot 301 and an annular groove 302. One end of the mounting plate 1 has a slot 301 with the same outer diameter as the valve seat of the steam safety valve. The annular groove 302, located on the outer periphery of the slot 301, corresponds to the position of the flange docking hole of the steam safety valve. When installing the mounting plate 1, the slot 301 at its end is aligned with the outer periphery of the valve seat and inserted. After insertion, the angle of the mounting plate 1 is adjusted so that the annular groove 302 inside is aligned with the docking hole of the flange of the steam safety valve. Then, the mounting plate 1 is lowered vertically so that the flange fastener is inserted into the annular groove 302. The position of the mounting plate 1 is fixed by the cooperation between the annular groove 302 and the fastener.

[0019] The vertical plate 202 has a slider 203 installed at its bottom inside the slide groove 201. The top of the mounting plate 1 is fixedly connected to a fixing plate 207 near the end of the vertical plate 202. A screw 208 is screwed into the fixing plate 207, and the end of the screw 208 abuts against the surface of the vertical plate 202. Through the cooperation of the slide groove 201 and the slider 203, the vertical plate 202 can be moved smoothly so that the screw sleeve 206 is aligned with the bolt to be adjusted. After the vertical plate 202 is adjusted to the position, tightening the screw 208 so that its end abuts against the surface of the vertical plate 202 can limit the position of the vertical plate 202.

[0020] The annular groove 302 is provided with hexagonal slots 303 inside; the hexagonal slots 303 can facilitate the insertion of valve body flange fasteners and match them perfectly.

[0021] It should be noted that this utility model is an adjustment device for the adjusting bolts of a main steam safety valve. During operation, since the current main steam safety valve calibration system can automatically calculate the required adjustment volume, or it can be manually calculated based on the main steam safety valve's setting parameters, the required adjustment volume is determined before adjustment. The parameters are then input to the control terminal of the hydraulic motor 205, ensuring that the power terminal of the hydraulic motor 205 operates exactly at the calculated volume. During adjustment, the mounting plate 1 is installed on the outer periphery of the main steam safety valve, and the vertical plate 202 slides along the slide groove 201, causing the threaded sleeves 206 on the surfaces of the vertical plate 202 and the horizontal plate 204 to engage with the two sets of adjusting bolts on the surface of the steam safety valve. After engagement, the bolts are tightened. The screw 208 fixes the position of the vertical plate 202, and then controls the hydraulic motor 205 to run. The hydraulic control component controls the hydraulic motor 205 to run according to the previously calculated adjustment number, so as to realize the automatic adjustment of the steam safety valve, reduce the amount of manual work, and avoid unnecessary damage to the sealing surface of the main steam safety valve that may be caused by multiple adjustments. When installing the mounting plate 1, the slot 301 at its end is aligned with the outer periphery of the valve seat and inserted. After insertion, the angle of the mounting plate 1 is adjusted so that the annular groove 302 opened inside it is aligned with the mating hole of the steam safety valve flange. Then the mounting plate 1 is lowered vertically so that the flange fastener is inserted into the annular groove 302. The position of the mounting plate 1 is fixed by the cooperation of the annular groove 302 and the fastener.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A main steam safety valve adjusting bolt adjustment device, comprising a mounting plate (1), characterized in that, It also includes an adjustment mechanism (2). The top of the mounting plate (1) is provided with an adjustment mechanism (2). The adjustment mechanism (2) includes a slide groove (201), a vertical plate (202), a horizontal plate (204), a hydraulic motor (205), and a screw sleeve (206). The top of the mounting plate (1) is provided with a slide groove (201), and the mounting plate (1) is slidably connected to the vertical plate (202) through the slide groove (201). The horizontal plate (204) is fixedly connected to one side of the surface of the vertical plate (202). The hydraulic motor (205) is installed on both the surface of the horizontal plate (204) and the surface of the vertical plate (202), and the power output end of the hydraulic motor (205) is installed with a screw sleeve (206).

2. The main steam safety valve adjusting bolt adjustment device according to claim 1, characterized in that: It also includes a positioning mechanism (3). The mounting plate (1) is provided with a positioning mechanism (3) on one side. The positioning mechanism (3) includes a slot (301) and an annular groove (302). The mounting plate (1) has a slot (301) with the same outer diameter as the steam safety valve seat at one end. The mounting plate (1) has an annular groove (302) at the outer periphery of the slot (301) corresponding to the position of the steam safety valve flange docking hole.

3. The main steam safety valve adjusting bolt adjustment device according to claim 1, characterized in that: The bottom of the vertical plate (202) is equipped with a slider (203) located inside the slide groove (201).

4. The main steam safety valve adjusting bolt adjustment device according to claim 1, characterized in that: A fixing plate (207) is fixedly connected to the top of the mounting plate (1) near the end of the vertical plate (202). A screw (208) is screwed into the fixing plate (207) and the end of the screw (208) abuts against the surface of the vertical plate (202).

5. The main steam safety valve adjusting bolt adjustment device according to claim 2, characterized in that: The annular groove (302) is provided with hexagonal slots (303) inside.

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