CN217380663U

CN217380663U - Wear-proof device for gate-adjusting LVDT

Info

Publication number: CN217380663U
Application number: CN202221179614.7U
Authority: CN
Inventors: 邱哲人; 纪凯师; 张正贺; 肖健楠; 范黎鹏; 杨长庆; 姜燃; 赵潇; 张维嘉; 吕晋
Original assignee: Datang Huangdao Power Generation Co ltd
Current assignee: Datang Huangdao Power Generation Co ltd
Priority date: 2022-05-17
Filing date: 2022-05-17
Publication date: 2022-09-06
Anticipated expiration: 2032-05-17

Abstract

An anti-abrasion device for a variable valve LVDT (linear variable differential transformer) comprises two LVDT iron cores, wherein the two LVDT iron cores are both connected with an iron core fixing plate, the middle part of the iron core fixing plate is used for being connected with a movable connecting rod of a turbine valve, and the LVDT iron cores are connected with the iron core fixing plate through shockproof buffer joints; the shockproof buffer joint comprises a lower connector, a ball movable groove is formed in the top of the lower connector, a steering ball is arranged in the ball movable groove and connected with a connecting column, the connecting column is connected with an upper connector, the upper connector is used for being connected with an LVDT iron core, and a buffer layer is arranged between the outer wall of the connecting column and the ball movable groove. The utility model provides a turnstile LVDT abrasionproof decreases device makes two LVDT coils and iron core adjust the depth of parallelism self-adaptively, greatly reduced LVDT iron core degree of wear, need not change the LVDT iron core frequently, reduced equipment failure rate.

Description

Wear-proof device for gate-adjusting LVDT

Technical Field

The utility model belongs to the technical field of power plant's high pressure valve LVDT installation abrasionproof decreases, in particular to valve LVDT abrasionproof decreases device.

Background

The lifting load of the power plant needs to operate the high-pressure regulating valve to act, and frequent action times are a characteristic of the high-pressure regulating valve. Due to the defects of installation conditions and the technical level of workers, the fact that abrasion of the LVDT iron core occurs in different degrees is often found, the structural strength of the LVDT iron core is affected, and further abrasion occurs inside the LVDT coil or the LVDT iron core is broken. In the prior art, a relatively mature feedback device of a double LVDT displacement sensor is represented by a valve feedback device based on the double LVDT displacement sensor disclosed in chinese patent document CN 215831270U, and the installation defects are as follows: the LVDT iron core often can't be parallel with the LVDT coil during installation because survey and drawing and processing precision influence, and receives the influence of environmental vibration, and the LVDT iron core becomes the wearing and tearing spare of great consumption, has influenced the fail safe nature of unit.

In conclusion, how to ensure the parallelism of the LVDT iron core and the coil and reduce the abrasion of the LVDT iron core is a main problem which needs to be solved urgently at present.

Disclosure of Invention

In view of the technical problem that the background art exists, the utility model provides a transfer LVDT abrasionproof device makes two LVDT coils and iron core can adjust the depth of parallelism adaptively, greatly reduced LVDT iron core degree of wear, need not frequently change the LVDT iron core, reduced equipment failure rate.

In order to solve the technical problem, the utility model discloses following technical scheme has been taken and has been realized:

an anti-abrasion device for a variable valve LVDT (linear variable differential transformer) comprises two LVDT iron cores, wherein the two LVDT iron cores are both connected with an iron core fixing plate, the middle part of the iron core fixing plate is used for being connected with a movable connecting rod of a turbine valve, and the LVDT iron cores are connected with the iron core fixing plate through shockproof buffer joints; the shockproof buffer joint comprises a lower connector, a ball movable groove is formed in the top of the lower connector, a steering ball is arranged in the ball movable groove and connected with a connecting column, the connecting column is connected with an upper connector, the upper connector is used for being connected with an LVDT iron core, and a buffer layer is arranged between the outer wall of the connecting column and the ball movable groove.

In the preferred scheme, the top of the upper connector is provided with an internal thread hole, the internal thread hole is in threaded connection with the LVDT iron core, and the LVDT iron core is provided with a locking nut.

In a preferred scheme, the buffer layer is a rubber sheath or a sealant.

In the preferred scheme, lower connector include external screw thread spliced pole down, middle cylinder is connected at external screw thread spliced pole top down, middle cylinder top detachably is equipped with upper fixed ring.

This patent can reach following beneficial effect:

the utility model provides a turnstile LVDT abrasionproof decreases device makes two LVDT coils and iron core adjust the depth of parallelism self-adaptively, greatly reduced LVDT iron core degree of wear, need not change the LVDT iron core frequently, reduced equipment failure rate.

Drawings

The invention will be further explained with reference to the following figures and examples:

FIG. 1 is a diagram showing the effect of the installation of the present invention;

FIG. 2 is a structural diagram (welding mode) of the shockproof buffer joint of the present invention;

fig. 3 is a structural diagram (bolt connection mode) of the shockproof buffer joint of the present invention.

In the figure: the LVDT iron core 1, the iron core fixing plate 2, the movable connecting rod connection 3, the shockproof buffer joint 4, the lower connecting head 41, the lower external thread connecting column 41.1, the middle column 41.2, the upper fixing ring 41.3, the steering ball 42, the connecting column 43, the upper connecting head 44 and the buffer layer 45.

Detailed Description

The preferable scheme is as shown in fig. 1 to fig. 3, the wear-resisting device of the variable valve LVDT comprises two LVDT iron cores 1, wherein the two LVDT iron cores 1 are both connected with an iron core fixing plate 2, the middle part of the iron core fixing plate 2 is used for being connected with a movable connecting rod 3 of a turbine valve, and the LVDT iron cores 1 are connected with the iron core fixing plate 2 through shockproof buffer joints 4; the shockproof buffer joint 4 comprises a lower connector 41, a ball body moving groove is formed in the top of the lower connector 41, a steering ball 42 is arranged in the ball body moving groove, the steering ball 42 is connected with a connecting column 43, the connecting column 43 is connected with an upper connector 44, the upper connector 44 is used for being connected with the LVDT iron core 1, and a buffer layer 45 is arranged between the outer wall of the connecting column 43 and the ball body moving groove.

According to the technical scheme, the shockproof buffer joint 4 is additionally arranged on the basis of the prior art, and when the two LVDT iron cores 1 are not completely parallel to each other or the LVDT iron cores 1 are subjected to shearing force due to vibration, the LVDT iron cores 1 are deformed or broken. However, since the LVDT is a direct-drive sensor, in order to ensure the working accuracy of the LVDT, the shock-proof buffer joint 4 can only deform within a certain range, specifically, the connection column 43 can only move within a certain taper angle, and the buffer layer 45 can not only absorb vibration energy, but also ensure that the connection column 43 does not loosen.

As shown in fig. 2, the shock-proof buffer joint 4 has the following specific structure: the top of the upper connector 44 is provided with an internal threaded hole, the internal threaded hole is in threaded connection with the LVDT iron core 1, and the LVDT iron core 1 is provided with a locking nut. The buffer layer 45 is a rubber sheath or sealant. The lower connector 41 comprises a lower external thread connecting column 41.1, the top of the lower external thread connecting column 41.1 is connected with an intermediate column 41.2, and the top of the intermediate column 41.2 is detachably provided with an upper fixing ring 41.3. As shown in fig. 2-3, the middle column 41.2 and the upper fixing ring 41.3 may be welded or bolted.

The lower external thread connecting column 41.1 is fixed with the iron core fixing plate 2 through a nut, and the iron core fixing plate 2 is connected with the movable connecting rod 3 through a bolt. The ball movable groove comprises a spherical groove and a cylindrical groove, and a gap for installing the buffer layer 45 is arranged between the connecting column 43 and the cylindrical groove.

The above-mentioned embodiments are merely preferred embodiments of the present invention, and should not be considered as limitations of the present invention, and the protection scope of the present invention should be defined by the technical solutions described in the claims, and includes equivalent alternatives of technical features in the technical solutions described in the claims. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.

Claims

1. The utility model provides a accent door LVDT abrasionproof decreases device, includes two LVDT iron cores (1), and two LVDT iron cores (1) all are connected with an iron core fixing plate (2), and iron core fixing plate (2) middle part is used for being connected (3), its characterized in that with the portable connecting rod of steam turbine valve: the LVDT iron core (1) is connected with the iron core fixing plate (2) through a shockproof buffer joint (4); the shockproof buffer joint (4) comprises a lower connector (41), a ball body moving groove is formed in the top of the lower connector (41), a steering ball (42) is arranged in the ball body moving groove, the steering ball (42) is connected with a connecting column (43), the connecting column (43) is connected with an upper connector (44), the upper connector (44) is used for being connected with the LVDT iron core (1), and a buffer layer (45) is arranged between the outer wall of the connecting column (43) and the ball body moving groove.

2. The adjustable gate LVDT wear prevention device according to claim 1, wherein: go up connector (44) top and be equipped with the internal thread hole, internal thread hole and LVDT iron core (1) threaded connection, and be equipped with lock nut on LVDT iron core (1).

3. The adjustable gate LVDT wear prevention device according to claim 1, wherein: the buffer layer (45) is a rubber sheath or a sealant.

4. The adjustable gate LVDT wear prevention device according to claim 1, wherein: lower connector (41) are including external screw thread spliced pole (41.1) down, and middle cylinder (41.2) is connected at external screw thread spliced pole (41.1) top down, and middle cylinder (41.2) top detachably is equipped with solid fixed ring (41.3).