Power station valve mounting and positioning clamp

Abstract

The utility model discloses a power station valve installing and positioning clamp and relates to the technical field of valve assembling. The large-diameter power station valve assembling tool solves the problem that an existing large-diameter power station valve assembling tool is poor in valve assembling precision due to the fact that a large-diameter power station valve is large in size and mass and the parallelism of a flange at the top end of a valve body is difficult to adjust. The connecting parts of a valve body and side flanges at the two ends are clamped at openings of V-shaped limiting grooves of two brackets respectively, adjusting gear rings which are coaxially arranged are arranged at the ends of the side flanges, and a plurality of gear ring connecting holes which correspond to a plurality of flange connecting holes of the side flanges in a one-to-one mode are machined in the end faces of the adjusting gear rings. The adjusting gear ring and the side flange are fixed through a plurality of gear ring connecting bolts, a horizontally-arranged driving gear is arranged below the adjusting gear ring, the driving gear is meshed with the adjusting gear ring, and the driving gear is installed on an output shaft of the lifting driving assembly. The device is used for adjusting the flatness of the power station valve in the assembling process and improving the assembling precision of the valve.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve assembly technical field, concretely relates to a power station valve installation positioning fixture. BACKGROUND

[0002] The power station valve is mainly used for various systems of thermal power station and is used for cutting off or connecting the medium of pipeline. Due to the particularity of the working scene of the power station valve, large-diameter valves need to be used, and the valve aperture is generally DN100~DN500, and the aperture of some valves is even as high as DN800. At present, the existing large-diameter power station valve assembly method generally adopts hoisting equipment (such as a bridge crane) to cooperate with a wire rope end clamp to assemble the valve. Workers install the valve stem or valve block to be assembled on the end clamp, a winch drives a roller to rotate, the wire rope moves the valve stem or valve block to be assembled to above the valve body, and then the hoisting equipment moves the valve stem or valve block downward to the valve body, and the valve assembly is completed under the assistance of workers. Parallelism is an important index for evaluating whether an object maintains a parallel state. However, the existing large-diameter power station valve assembly tooling has the problem that it is difficult to adjust the parallelism of the upper flange of the valve body due to the large volume and mass of the large-diameter power station valve, resulting in poor valve assembly precision. SUMMARY

[0003] The utility model aims at solving the problem that the existing large-diameter power station valve assembly tooling has the problem that it is difficult to adjust the parallelism of the upper flange of the valve body due to the large volume and mass of the large-diameter power station valve, resulting in poor valve assembly precision, and further provides a power station valve installation positioning fixture.

[0004] The technical scheme of the utility model is:

[0005] A power station valve installation positioning fixture, the positioning fixture comprises a valve body support assembly 1, the valve body support assembly 1 comprises two brackets 101 arranged vertically opposite, the positioning fixture further comprises an adjusting gear ring 2, a driving gear 3, a lifting drive assembly 4 and a plurality of gear ring connecting bolts 5, a V-shaped limiting groove 102 is formed in the middle of the top end of the bracket 101, a valve body 6 is horizontally arranged above the bracket 101, the valve body 6 body and the connecting part of the flanges 601 at both ends are clamped at the opening of the V-shaped limiting groove 102 of the two brackets 101, one side flange 601 end of the valve body 6 is provided with a coaxially arranged adjusting gear ring 2, a plurality of gear ring connecting holes are processed on the end face of the adjusting gear ring 2 in the circumferential direction, the plurality of gear ring connecting holes are one-to-one corresponding with a plurality of flange connecting holes of the side flange 601, the adjusting gear ring 2 is fixed with the side flange 601 through the plurality of gear ring connecting bolts 5, a driving gear 3 is horizontally arranged below the adjusting gear ring 2, the driving gear 3 is engaged with the adjusting gear ring 2, and the driving gear 3 is installed on the output shaft of the lifting drive assembly 4.

[0006] Further, the positioning fixture further comprises a bracket spacing adjustment assembly 7, the bracket spacing adjustment assembly 7 is arranged below the two brackets 101, and two movable ends of the bracket spacing adjustment assembly 7 are fixedly connected with the bottom of the two brackets 101 respectively.

[0007] Further, the bracket spacing adjustment assembly 7 comprises a base 701, a translation driving assembly 702, a bidirectional positive and negative tooth ball screw mechanism 703, a linear guide rail mechanism 704 and four bracket connecting plates 705, the base 701 is horizontally arranged below the two brackets 101, the upper surface of the base 701 is provided with the bidirectional positive and negative tooth ball screw mechanism 703, one end of a lead screw of the bidirectional positive and negative tooth ball screw mechanism 703 is connected with an output shaft of the translation driving assembly 702 through a shaft coupling, the linear guide rail mechanism 704 is arranged side by side on the side of the bidirectional positive and negative tooth ball screw mechanism 703, the slide rail of the linear guide rail mechanism 704 is mounted on the base 701, and the two slide blocks of the linear guide rail mechanism 704 are connected with one end of the lower surfaces of the two brackets 101 through the two bracket connecting plates 705 respectively, and the two nuts of the bidirectional positive and negative tooth ball screw mechanism 703 are connected with the other end of the lower surfaces of the two brackets 101 through the two bracket connecting plates 705 respectively.

[0008] Further, the lifting driving assembly 4 comprises a gear rotating shaft 401, a bearing seat 402, a lifting motor speed reducer 403 and a motor support 404, the driving gear 3 is connected with one end of the gear rotating shaft 401 through a key, the driving gear 3 is provided with the lifting motor speed reducer 403 at the end, the output shaft of the lifting motor speed reducer 403 is connected with the other end of the gear rotating shaft 401 through a shaft coupling, the bearing seat 402 is arranged between the driving gear 3 and the lifting motor speed reducer 403, and the bearing seat 402 is rotationally connected with the bearing seat 402 through a bearing.

[0009] Further, the positioning fixture further comprises a lifting assembly 8, the lifting assembly 8 is arranged on the side of the lifting motor speed reducer 403, a movable end of the lifting assembly 8 is connected with the bearing seat 402 and the lifting motor speed reducer 403, and the lifting assembly 8 is mounted on the base 701.

[0010] Further, the lifting assembly 8 comprises a supporting plate 801, a lifting cylinder 802 and a cylinder support 803, the supporting plate 801 is horizontally arranged below the lifting motor speed reducer 403, one end of the upper surface of the supporting plate 801 is fixedly connected with the bearing seat 402 and the lifting motor speed reducer 403, a lifting cylinder 802 vertically arranged above the other end of the supporting plate 801, the end of the lifting cylinder 802 is connected with the supporting plate 801 through a connecting piece, the cylinder body of the lifting cylinder 802 is mounted on the top of the cylinder support 803, and the bottom of the cylinder support 803 is connected with the base 701.

[0011] Further, the cylinder support 803 comprises a cylinder connecting plate 804, a vertical plate 805, a hole plate 806 and a plurality of support locking bolts 807, the cylinder connecting plate 804 and the hole plate 806 are horizontally arranged at the upper and lower ends of the vertical plate 805 respectively, the cylinder connecting plate 804 is slidably sleeved on the telescopic rod of the lifting cylinder 802, the upper surface of the cylinder connecting plate 804 is connected with the lower surface of the cylinder of the lifting cylinder 802, a plurality of hole plate connecting threaded holes 706 are arranged on the base 701, and the hole plate 806 is detachably connected with the base 701 through the plurality of support locking bolts 807.

[0012] Further, the plurality of hole plate connecting threaded holes 706 on the base 701 are arranged in an array mode from front to back along the axis direction of the valve body 6.

[0013] Compared with the prior art, the power station valve mounting positioning clamp has the following effects:

[0014] The power station valve mounting positioning clamp is used for adjusting the parallelism of the flange on the valve body in the valve assembly process. The positioning clamp ingeniously utilizes the side flange of the valve body, the adjusting gear ring is installed on the end of the side flange through bolts, the adjusting gear ring is engaged with the driving gear, the driving gear is driven to rotate through the motor, and then the valve body fixed with the adjusting gear ring is driven to rotate, so that the parallelism of the flange on the valve body is adjusted, and the valve assembly precision is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a front view of the power station valve mounting positioning clamp of the utility model;

[0016] Figure 2 is Figure 1 a sectional view at A-A;

[0017] Figure 3 is Figure 2 a sectional view at B-B;

[0018] Figure 4 is a front view of the bracket spacing adjusting assembly;

[0019] Figure 5 is a front view of the adjusting gear ring;

[0020] Figure 6 is a side view of the adjusting gear ring;

[0021] Figure 7 is a front view of the bracket;

[0022] Figure 8 is a side view of the bracket;

[0023] Figure 9 is a front view of the lifting assembly.

[0024] In the figure: 1, valve body support assembly; 2, adjusting gear ring; 3, driving gear; 4, lifting drive assembly; 5, gear ring connecting bolt; 6, valve body; 7, bracket spacing adjustment assembly; 8, lifting assembly; 9, laser measuring instrument; 101, bracket; 102, V-shaped limiting groove; 401, gear shaft; 402, bearing seat; 403, lifting motor reducer; 404, motor support; 601, side flange; 602, upper flange; 701, base; 702, translation drive assembly; 703, bidirectional positive and negative tooth ball screw mechanism; 704, linear guide mechanism; 705, bracket connecting plate; 801, support plate; 802, lifting cylinder; 803, cylinder support; 804, cylinder connecting plate; 805, vertical plate; 806, hole plate; 807, bracket locking bolt. DETAILED DESCRIPTION

[0025] Specific implementation one: combined Figures 1 to 9 In this embodiment, the power station valve installation positioning fixture includes a valve body support assembly 1, which includes two brackets 101 arranged vertically opposite to each other. The positioning fixture further includes an adjusting gear ring 2, a driving gear 3, a lifting drive assembly 4, and a plurality of gear ring connecting bolts 5. A V-shaped limiting groove 102 is formed in the middle of the top end of the bracket 101. A valve body 6 is horizontally arranged above the bracket 101. The valve body 6 body and the two end side flanges 601 connection parts are respectively clamped in the openings of the two bracket 101 V-shaped limiting grooves 102. One side flange 601 end of the valve body 6 is provided with a coaxially arranged adjusting gear ring 2. A plurality of gear ring connecting holes are processed on the end face of the adjusting gear ring 2 in the circumferential direction. The plurality of gear ring connecting holes are respectively corresponding to the plurality of flange connecting holes of the side flange 601. The adjusting gear ring 2 and the side flange 601 are fixed through the plurality of gear ring connecting bolts 5. A driving gear 3 is arranged below the adjusting gear ring 2. The driving gear 3 is engaged with the adjusting gear ring 2. The driving gear 3 is installed on the output shaft of the lifting drive assembly 4.

[0026] Specific implementation two: combined Figures 1 to 9 In this embodiment, the positioning fixture further includes a bracket spacing adjustment assembly 7, which is arranged below the two brackets 101. The two movable ends of the bracket spacing adjustment assembly 7 are respectively fixedly connected with the bottom of the two brackets 101. In this way, the bracket spacing adjustment assembly 7 is used to adjust the spacing between the two brackets 101. At the same time, the V-shaped limiting groove 102 is formed at the top end of the bracket 101 to adapt to the support and limiting of different models and different caliber valve bodies. The other components and connection relationships are the same as those of the specific implementation one.

[0027] Specific implementation three: combined Figures 1 to 9To illustrate the embodiment, the bracket spacing adjustment assembly 7 of the embodiment includes a base 701, a translation driving assembly 702, a bidirectional positive and negative tooth ball screw mechanism 703, a linear guide rail mechanism 704, and four bracket connecting plates 705. The base 701 is horizontally arranged below the two brackets 101. The upper surface of the base 701 is provided with the bidirectional positive and negative tooth ball screw mechanism 703. One end of the screw rod of the bidirectional positive and negative tooth ball screw mechanism 703 is connected with the output shaft of the translation driving assembly 702 through a shaft coupling. The side of the bidirectional positive and negative tooth ball screw mechanism 703 is provided with the linear guide rail mechanism 704 arranged side by side. The slide rail of the linear guide rail mechanism 704 is mounted on the base 701. The two slide blocks of the linear guide rail mechanism 704 are respectively connected with one end of the lower surface of the two brackets 101 through the two bracket connecting plates 705. The two nuts of the bidirectional positive and negative tooth ball screw mechanism 703 are respectively connected with the other end of the lower surface of the two brackets 101 through the two bracket connecting plates 705. In this way, the translation driving assembly 702 adopts a motor reducer. The motor reducer drives the two nuts of the bidirectional positive and negative tooth ball screw mechanism 703 to move inwards or outwards along the linear guide rail mechanism 704 at the same time, thereby driving the two bracket connecting plates 705 and the two brackets 101 mounted thereon to move synchronously, so as to adapt to the support and positioning of valve bodies of different models and different diameters. The other components and connection relationships are the same as those in the first or second embodiment.

[0028] Specific embodiment four: combination Figures 1 to 9 To illustrate the embodiment, the lifting driving assembly 4 of the embodiment includes a gear rotating shaft 401, a bearing seat 402, a lifting motor reducer 403, and a motor support 404. One end of the driving gear 3 is connected with one end of the gear rotating shaft 401 through a flat key. The end of the driving gear 3 is provided with the lifting motor reducer 403. The output shaft of the lifting motor reducer 403 is connected with the other end of the gear rotating shaft 401 through a shaft coupling. The bearing seat 402 is arranged between the driving gear 3 and the lifting motor reducer 403 and is rotationally connected with the bearing seat 402 through a bearing. In this way, the lifting motor reducer 403 drives the gear rotating shaft 401 and the driving gear 3 mounted thereon to rotate. The driving gear 3 is engaged with the adjusting gear ring 2, thereby driving the adjusting gear ring 2 to rotate. The adjusting gear ring 2 is fixed with one side flange 601 of the valve body 6 through a plurality of gear ring connecting bolts 5, thereby driving the valve body 6 as a whole to rotate in the V-shaped limiting groove 102. In this way, the parallelism of the upper surface of the upper flange 602 of the valve body 6 is adjusted. The other components and connection relationships are the same as those in the first, second, or third embodiment.

[0029] In the embodiment, the lifting motor reducer 403 is connected with a controller. The controller is connected with a laser measuring instrument 9. The laser measuring instrument 9 can adopt an SJ6000 laser interferometer. The laser measuring instrument 9 is arranged on one side of the upper flange 602 of the valve body 6 and is mounted on an adjustable height support (on the upper flange 602 of the valve body 6 in the first embodiment, on the upper flange 602 of the valve body 6 in the second embodiment, or on the upper flange 602 of the valve body 6 in the third embodiment). Figure 1(Not shown in the image). When the laser measuring instrument 9 irradiates the surface of the upper flange 602 with a laser beam, the sensor receives the reflected laser beam, measures the shape and size of the workpiece, and thus assesses the magnitude of the parallelism error.

[0030] Specific Implementation Method Five: Combining Figures 1 to 9 In this embodiment, the positioning fixture further includes a lifting assembly 8, which is disposed on the side of the lifting motor reducer 403. The movable end of the lifting assembly 8 is connected to the bearing seat 402 and the lifting motor reducer 403, and the lifting assembly 8 is mounted on the base 701. This configuration allows the lifting assembly 8 to adjust the height of the bearing seat 402, the lifting motor reducer 403, and the gear shaft 401, thereby accommodating adjusting gear rings 2 with different bore diameters. Other components and connections are the same as in specific embodiments one, two, three, or four.

[0031] In this embodiment, the adjusting gear ring 2 can be designed with a series of adjusting gear rings of different diameters to match valve bodies of different sizes, effectively improving the versatility of the positioning fixture.

[0032] Specific Implementation Method Six: Combination Figures 1 to 9 This embodiment describes a lifting assembly 8 comprising a support plate 801, a lifting cylinder 802, and a cylinder bracket 803. The support plate 801 is horizontally positioned below the lifting motor reducer 403. One end of the upper surface of the support plate 801 is fixedly connected to the bearing seat 402 and the lifting motor reducer 403. A vertically positioned lifting cylinder 802 is located above the other end of the support plate 801. The end of the telescopic rod of the lifting cylinder 802 is connected to the support plate 801 via a connector. The cylinder body of the lifting cylinder 802 is mounted on top of the cylinder bracket 803, and the bottom of the cylinder bracket 803 is connected to the base 701. With this configuration, when the telescopic rod of the lifting cylinder 802 retracts, it causes the bearing seat 402, the lifting motor reducer 403, and the gear shaft 401 to move upwards, thereby accommodating a valve body flange with a smaller diameter. When the telescopic rod of the lifting cylinder 802 extends, it causes the bearing seat 402, the lifting motor reducer 403, and the gear shaft 401 to move downwards, thereby accommodating a valve body flange with a larger diameter. Other components and connections are the same as in specific implementation methods one, two, three, four, or five.

[0033] Specific implementation method seven: Combination Figures 1 to 9In this embodiment, the cylinder support 803 comprises a cylinder connecting plate 804, a vertical plate 805, a hole plate 806 and a plurality of support locking bolts 807. The cylinder connecting plate 804 and the hole plate 806 are respectively arranged horizontally at the upper and lower ends of the vertical plate 805. The cylinder connecting plate 804 is provided with a telescopic rod mounting hole. The cylinder connecting plate 804 is slidably sleeved on the telescopic rod of the lifting cylinder 802. The upper surface of the cylinder connecting plate 804 is connected with the lower surface of the cylinder body of the lifting cylinder 802. The base 701 is provided with a plurality of hole plate connecting threaded holes 706. The hole plate 806 is detachably connected with the base 701 through the plurality of support locking bolts 807. The other components and connection relationships are the same as those in the first, second, third, fourth, fifth or sixth embodiment.

[0034] Eighth embodiment Figures 1 to 9 In this embodiment, the plurality of hole plate connecting threaded holes 706 on the base 701 are arranged in an array from front to back along the axis direction of the valve body 6. In this way, the hole plate 806 in the cylinder support 803 is detachably connected with the base 701 through bolts. Moreover, the plurality of hole plate connecting threaded holes 706 on the base 701 are arranged in an array, which can adapt to the length of the valve body in the axis direction of different sizes and models. The other components and connection relationships are the same as those in the first, second, third, fourth, fifth, sixth or seventh embodiment.

[0035] Working principle

[0036] Combination Figures 1 to 9The utility model discloses a kind of working principles of power station valve installation positioning fixture: first, the distance between two brackets 101 is determined according to the length of valve body 6 in the axial direction, two nuts are driven along linear guide mechanism 704 by bidirectional positive and negative tooth ball screw mechanism 703 driven by translation driving assembly 702 to move inwards simultaneously or move outwards simultaneously, further drive two bracket connecting plates 705 and the two brackets 101 installed thereon synchronous movement, realize the distance adjustment between two brackets 101.Then a plurality of gear ring connecting bolts 5 are used to install adjusting gear ring 2 on one side flange 601 of valve body 6, and the spatial position of driving gear 3 is adjusted according to the position of adjusting gear ring 2.Determine the hole plate connecting threaded hole 706 of proper position on base 701, connect the hole plate 806 in cylinder bracket 803 with the hole plate connecting threaded hole 706 of proper position determined on base 701 using support locking bolt 807, realize the adjustment of driving gear 3 in the axial direction of valve body;Then lift assembly 8 is used to adjust bearing seat 402, lifting motor reducer 403 and gear shaft 401 to proper position, so that driving gear 3 is engaged with adjusting gear ring 2;Then lifting motor reducer 403 is used to drive gear shaft 401 and driving gear 3 installed thereon to rotate, drive adjusting gear ring 2 to rotate.When laser measuring instrument 9 irradiates laser beam on the surface of upper flange 602, sensor receives the laser beam reflected back, the shape and size of workpiece are measured, so as to evaluate the size of parallelism error.

[0037] The above embodiments are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of technical features; and these modifications or replacements do not make the essence of corresponding technical solutions deviate from the spirit and scope of the technical solutions of the utility model embodiments.

Claims

1. A power plant valve installation positioning fixture, the positioning fixture comprising a valve body support assembly (1), the valve body support assembly (1) comprising two vertically opposed brackets (101), characterised in that: The positioning clamp further comprises an adjusting gear ring (2), a driving gear (3), a lifting driving assembly (4) and a plurality of gear ring connecting bolts (5), a V-shaped limiting groove (102) is formed in the middle of the top end of the bracket (101), a valve body (6) is horizontally arranged above the bracket (101), the valve body (6) is clamped at the opening of the V-shaped limiting groove (102) of the two brackets (101) respectively, one end of the valve body (6) is provided with the coaxially arranged adjusting gear ring (2), a plurality of gear ring connecting holes are formed on the end face of the adjusting gear ring (2) in the circumferential direction, the plurality of gear ring connecting holes are one-to-one corresponding to the plurality of flange connecting holes of the side flange (601), the adjusting gear ring (2) and the side flange (601) are fixed through the plurality of gear ring connecting bolts (5), and the adjusting gear ring (2) is provided with the horizontally arranged driving gear (3) below, the driving gear (3) is engaged with the adjusting gear ring (2), and the driving gear (3) is installed on the output shaft of the lifting driving assembly (4).

2. A power plant valve installation positioning fixture according to claim 1, characterised in that: The positioning clamp further comprises a bracket spacing adjusting assembly (7), the bracket spacing adjusting assembly (7) is arranged below the two brackets (101), and the two movable ends of the bracket spacing adjusting assembly (7) are fixedly connected with the bottom portions of the two brackets (101) respectively.

3. A power plant valve installation positioning fixture according to claim 2, characterised in that: The bracket spacing adjusting assembly (7) comprises a base (701), a translation driving assembly (702), a bidirectional positive and negative tooth ball screw mechanism (703), a linear guide rail mechanism (704) and four bracket connecting plates (705), the base (701) is horizontally arranged below the two brackets (101), the upper surface of the base (701) is provided with the bidirectional positive and negative tooth ball screw mechanism (703), one end of the screw rod of the bidirectional positive and negative tooth ball screw mechanism (703) is connected with the output shaft of the translation driving assembly (702) through a shaft coupling, the side portion of the bidirectional positive and negative tooth ball screw mechanism (703) is provided with the linear guide rail mechanism (704) arranged side by side, the slide rail of the linear guide rail mechanism (704) is installed on the base (701), the top ends of the two sliders of the linear guide rail mechanism (704) are connected with one end of the lower surfaces of the two brackets (101) through the two bracket connecting plates (705) respectively, and the top ends of the two nuts of the bidirectional positive and negative tooth ball screw mechanism (703) are connected with the other end of the lower surfaces of the two brackets (101) through the two bracket connecting plates (705) respectively.

4. A valve installation positioning fixture for a power plant according to claim 1 or 3, characterized in that: The lifting driving assembly (4) comprises a gear rotating shaft (401), a bearing seat (402), a lifting motor reducer (403) and a motor support (404), the driving gear (3) is connected with one end of the gear rotating shaft (401) through a key, the driving gear (3) is provided with the lifting motor reducer (403), the output shaft of the lifting motor reducer (403) is connected with the other end of the gear rotating shaft (401) through a shaft coupling, the bearing seat (402) is arranged between the driving gear (3) and the lifting motor reducer (403), and the bearing seat (402) is rotationally connected with the bearing seat (402) through a bearing.

5. A power plant valve installation positioning fixture according to claim 4, characterised in that: The positioning clamp further comprises a lifting assembly (8) arranged at the side of the lifting motor reducer (403), the movable end of the lifting assembly (8) is connected with the bearing seat (402) and the lifting motor reducer (403), and the lifting assembly (8) is installed on the base (701).

6. A power plant valve installation positioning fixture according to claim 5, characterised in that: The lifting assembly (8) comprises a supporting plate (801), a lifting cylinder (802) and a cylinder support (803), the supporting plate (801) is horizontally arranged below the lifting motor reducer (403), the upper surface of one end of the supporting plate (801) is fixedly connected with the bearing seat (402) and the lifting motor reducer (403), a lifting cylinder (802) vertically arranged is arranged above the other end of the supporting plate (801), the end of the telescopic rod of the lifting cylinder (802) is connected with the supporting plate (801) through a connecting piece, the cylinder body of the lifting cylinder (802) is installed on the top of the cylinder support (803), and the bottom of the cylinder support (803) is connected with the base (701).

7. A power plant valve installation positioning fixture according to claim 6, characterised in that: The cylinder support (803) comprises a cylinder body connecting plate (804), a vertical plate (805), a hole plate (806) and a plurality of support locking bolts (807), the cylinder body connecting plate (804) and the hole plate (806) are respectively arranged horizontally at the upper and lower ends of the vertical plate (805), the telescopic rod mounting hole is formed in the upper surface of the cylinder body connecting plate (804), the cylinder body connecting plate (804) is slidably sleeved on the telescopic rod of the lifting cylinder (802), the upper surface of the cylinder body connecting plate (804) is connected with the lower surface of the cylinder body of the lifting cylinder (802), a plurality of hole plate connecting threaded holes (706) are formed in the base (701), and the hole plate (806) is detachably connected with the base (701) through the plurality of support locking bolts (807).

8. A power plant valve installation positioning fixture according to claim 7, characterised in that: The plurality of hole plate connecting threaded holes (706) on the base (701) are arranged in an array mode from front to back along the axis direction of the valve body (6).

Images