Device for accurately measuring scales of valve rod of pumped storage power plant valve

Abstract

The utility model belongs to the technical field of valve rod scale measurement, and particularly relates to a valve rod scale accurate measurement device for a pumped storage power plant, which comprises a detection mechanism mounted on a valve pipeline and a positioning block (3) mounted on a valve rod support. A support (2) perpendicular to the supporting base (1) is arranged on the supporting base (1), a lead screw (4) parallel to a valve rod is arranged in the middle of the support (2), a guide rod (5) is arranged on one side of the lead screw (4), a lead screw seat (6) is arranged on the lead screw (4) and the guide rod (5), a positioning ruler (7) used for positioning the height of the valve rod is arranged on the lead screw seat (6), and scales corresponding to the positioning ruler (7) are arranged in the support (2). And a positioning mechanism corresponding to the positioning block (3) is arranged on the front sides of the lead screw (4) and the guide rod (5). The device has the advantages of being good in applicability and convenient to use.

Description

Technical Field

[0001] This utility model belongs to the field of valve stem scale measurement technology, specifically a device for precise measurement of valve stem scale in pumped storage power plants. Background Technology

[0002] In the operation and maintenance of pumped storage power stations, seasonal changes in cooling water temperature necessitate continuous adjustments to the cooling water flow rate of each guide bearing, making precise valve control crucial. Valve stem calibration is a vital basis for determining the valve's opening degree and control accuracy. Currently, adjusting the flow rate of each bearing in the unit is primarily achieved by installing flow meters on the water pipeline. However, the seasonal nature of flow necessitates periodic remeasurement of valve opening. Traditional measuring tools may not be suitable for valve stems and pipes of varying sizes, resulting in poor applicability. Utility Model Content

[0003] To overcome the shortcomings of existing technologies and solve at least one of the problems mentioned in the background art, a device for accurately measuring the valve stem scale of pumped storage power plants is proposed.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: The device for precise measurement of valve stem scale of pumped storage power plant valves according to this utility model includes a detection mechanism installed on the valve pipeline and a positioning block installed on the valve stem support. The detection mechanism includes a support base, a bracket perpendicular to the support base, a lead screw parallel to the valve stem in the middle of the bracket, a guide rod on one side of the lead screw, a lead screw seat on the lead screw and the guide rod, a positioning ruler for positioning the valve stem height on the lead screw seat, a scale corresponding to the positioning ruler in the bracket, and a positioning mechanism corresponding to the positioning block on the front side of the lead screw and the guide rod.

[0005] The aforementioned device for precise measurement of valve stem scale in pumped storage power plants includes an upper clamp, a lower clamp, a connecting seat for connecting the upper clamp and the lower clamp, and a locking seat for locking the upper clamp and the lower clamp. The locking seat includes an upper fixing block and a lower fixing block respectively disposed at the end of the upper clamp and at the end of the lower clamp. The lower side of the upper fixing block is provided with a locking block, and the locking block is provided with positioning holes on both sides. The lower fixing block is provided with a locking groove corresponding to the locking block.

[0006] The aforementioned device for precise measurement of valve stem scale in pumped storage power plants has a self-tightening mechanism located at the axial center of the inner side of the upper and lower clamps. The self-tightening mechanism has multiple sets of abutment rods on one side for locking the support base and the valve pipeline. The abutment rod ends are provided with radially arranged pressure blocks.

[0007] The aforementioned device for precise measurement of valve stem scale in pumped storage power plants includes a self-tightening mechanism comprising a telescopic rod mounted on an upper clamp and a lower clamp and arranged radially, a spring on the outside of the telescopic rod, and a stop block at the end of the telescopic rod and the spring for abutting against the valve pipeline.

[0008] The aforementioned device for precise measurement of valve stem scale in pumped storage power plants includes a positioning block for an arc-shaped sleeve, with a positioning groove on the outer side of the arc-shaped sleeve.

[0009] The aforementioned device for precise measurement of valve stem scale in pumped storage power plants includes a positioning mechanism comprising a bidirectional lead screw horizontally positioned on one side of the lead screw and guide rod, a movable seat abutting against the bottom surface of the bracket on the bidirectional lead screw, and a positioning rod corresponding to the positioning groove on the movable seat.

[0010] The beneficial effects of this utility model are as follows:

[0011] 1. The valve stem calibration precision measuring device for pumped storage power plants described in this utility model facilitates the connection between this application and valves and water pipes of different sizes by setting a support base. The self-locking mechanism can reduce the shaking of this application during installation, resulting in good reliability.

[0012] 2. The device for precise measurement of valve stem scale in pumped storage power plants described in this utility model, by setting a positioning block and a positioning mechanism, facilitates the positioning of this application, so that the lead screw can be parallel to the valve stem, thereby improving the measurement effect. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the support base of this utility model;

[0016] Figure 3 This is a structural schematic diagram of the positioning mechanism of this utility model.

[0017] Legend:

[0018] 1-Support base, 2-Bracket, 3-Positioning block, 4-Screw rod, 5-Guide rod, 6-Screw rod seat, 7-Positioning ruler, 8-Upper clamp, 9-Lower clamp, 10-Connecting seat, 11-Locking seat, 12-Abutting rod, 13-Pressure block, 14-Upper fixing block, 15-Lower fixing block, 16-Clamping block, 17-Positioning hole, 18-Clamping groove, 19-Telescopic rod, 20-Spring, 21-Abutting block, 22-Arc-shaped sleeve, 23-Positioning groove, 24-Double-acting screw, 25-Moving seat, 26-Positioning rod. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0020] Specific implementation examples are given below.

[0021] like Figures 1 to 3 As shown in the embodiment of this utility model, the valve stem calibration precision measuring device for pumped storage power plants includes a detection mechanism installed on the valve pipeline and a positioning block 3 installed on the valve stem support. The detection mechanism includes a support base 1, a bracket 2 perpendicular to the support base 1, a lead screw 4 parallel to the valve stem in the middle of the bracket 2, a guide rod 5 on one side of the lead screw 4, a lead screw seat 6 on the lead screw 4 and the guide rod 5, a positioning ruler 7 for positioning the valve stem height on the lead screw seat 6, a scale corresponding to the positioning ruler 7 in the bracket 2, and a positioning mechanism corresponding to the positioning block 3 on the front side of the lead screw 4 and the guide rod 5.

[0022] The support base 1 includes an upper clamp 8, a lower clamp 9, a connecting seat 10 for connecting the upper clamp 8 and the lower clamp 9, and a locking seat 11 for locking the upper clamp 8 and the lower clamp 9. The locking seat 11 includes an upper fixing block 14 disposed at the end of the upper clamp 8 and a lower fixing block 15 disposed at the end of the lower clamp 9. The lower side of the upper fixing block 14 is provided with a locking block 16, and the locking block 16 is provided with positioning holes 17 on both sides. The lower fixing block 15 is provided with a locking groove 18 corresponding to the locking block 16.

[0023] The upper clamp 8 and the lower clamp 9 are provided with a self-tightening mechanism in the axial middle part of their inner sides. On one side of the self-tightening mechanism, there are multiple sets of abutment rods 12 for locking the support base 1 and the valve pipeline. The end of the abutment rod 12 is provided with a radially arranged pressure block 13.

[0024] The self-tightening mechanism includes a telescopic rod 19 installed on the upper clamp 8 and the lower clamp 9 and arranged radially. A spring 20 is provided on the outside of the telescopic rod 19. The ends of the telescopic rod 19 and the spring 20 are provided with abutment blocks 21 for abutting against the valve pipeline.

[0025] The positioning block 3 includes an arc-shaped sleeve 22, and the outer side of the arc-shaped sleeve 22 is provided with a positioning groove 23.

[0026] The positioning mechanism includes a bidirectional lead screw 24 horizontally arranged on one side of the lead screw 4 and the guide rod 5. The bidirectional lead screw 24 is provided with a movable seat 25 that abuts against the bottom surface of the bracket 2. The movable seat 25 is provided with a positioning rod 26 corresponding to the positioning groove 23.

[0027] The principle of this application is that it is installed using a support base 1. During installation, the upper clamp 8 and lower clamp 9 rotate around the connecting seat 10 to open the support base 1. After the upper clamp 8 and lower clamp 9 are connected to the outside of the pipe, the cooperation of the locking block 16 and the locking groove 18 achieves initial locking, and the positioning hole 17 also achieves initial locking. The locking groove 18 of the lower fixing block 15 has through holes on both sides corresponding to the positioning hole 17, which can be initially fixed with bolts and nuts, but not locked, allowing the support base 1 to rotate relative to the pipe. At this time, the self-locking mechanism can achieve initial locking of the support base, preventing the support base 1 from rotating without external force, which would cause the positioning screw and valve stem to be unable to rotate. The self-locking mechanism, under the action of a spring, presses the stop block 21 against the valve pipe, achieving initial locking. Then, by rotating the double-acting screw 24, which is driven by a motor or manually via a rocker arm at its end, the moving seat moves the positioning rod 26 to engage with the positioning block 3 for positioning. The engaging block is mounted on the valve bracket, allowing the positioning rod 26 to engage in the positioning groove 23. Then, by locking the upper clamp 8 and lower clamp 9 and rotating the stop rod 12, the pressure block 13 presses against the pipe, achieving locking and completing the positioning process. At this point, the double-acting screw is reversed, and the positioning block is removed. Finally, the positioning ruler 7 moves up and down via the screw 4. Like the double-acting screw, the screw 4 is driven by a motor or manually via a rocker arm at its end to measure the valve stem descent height. This application has the advantages of good applicability and ease of use.

[0028] 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 claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A device for precise measurement of valve stem graduations in pumped storage power plants, characterized in that: The device includes a detection mechanism installed on the valve pipeline and a positioning block (3) installed on the valve stem support. The detection mechanism includes a support base (1), a bracket (2) perpendicular to the support base (1) is provided on the support base (1), a lead screw (4) parallel to the valve stem is provided in the middle of the bracket (2), a guide rod (5) is provided on one side of the lead screw (4), a lead screw seat (6) is provided on the lead screw (4) and the guide rod (5), a positioning ruler (7) for positioning the valve stem height is provided on the lead screw seat (6), a scale corresponding to the positioning ruler (7) is provided in the bracket (2), and a positioning mechanism corresponding to the positioning block (3) is provided on the front side of the lead screw (4) and the guide rod (5).

2. The device for precise measurement of valve stem scale in pumped storage power plants according to claim 1, characterized in that: The support base (1) includes an upper clamp (8), a lower clamp (9), a connecting seat (10) for connecting the upper clamp (8) and the lower clamp (9), and a locking seat (11) for locking the upper clamp (8) and the lower clamp (9). The locking seat (11) includes an upper fixing block (14) respectively disposed at the end of the upper clamp (8) and a lower fixing block (15) disposed at the end of the lower clamp (9). The upper fixing block (14) has a locking block (16) on its lower side, and positioning holes (17) are provided on both sides of the locking block (16). The lower fixing block (15) has a locking groove (18) corresponding to the locking block (16).

3. The device for precise measurement of valve stem scale in pumped storage power plants according to claim 2, characterized in that: The upper clamp (8) and the lower clamp (9) are provided with a self-tightening mechanism in the axial middle part of their inner sides. The self-tightening mechanism is provided with multiple sets of abutment rods (12) on one side for locking the support base (1) and the valve pipeline. The abutment rod (12) is provided with a radially arranged pressure block (13) at its end.

4. The device for precise measurement of valve stem scale in pumped storage power plants according to claim 3, characterized in that: The self-tightening mechanism includes a telescopic rod (19) installed on the upper clamp (8) and the lower clamp (9) and arranged radially. A spring (20) is provided outside the telescopic rod (19). The ends of the telescopic rod (19) and the spring (20) are provided with abutment blocks (21) for abutting against the valve pipeline.

5. The device for precise measurement of valve stem scale in pumped storage power plants according to claim 1, characterized in that: The positioning block (3) includes an arc-shaped sleeve (22), and the outer side of the arc-shaped sleeve (22) is provided with a positioning groove (23).

6. The device for precise measurement of valve stem scale in pumped storage power plants according to claim 1, characterized in that: The positioning mechanism includes a bidirectional lead screw (24) located on one side of the lead screw (4) and the guide rod (5) and horizontally arranged. The bidirectional lead screw (24) is provided with a movable seat (25) that abuts against the bottom surface of the bracket (2). The movable seat (25) is provided with a positioning rod (26) corresponding to the positioning groove (23).

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