CN209110951U - A valve block opening tool for a converter valve - Google Patents

Abstract

The utility model relates to the technical field of overhaul and maintenance of converter valve equipment in a converter station, in particular to a converter valve valve block opening tool. The tool includes a hydraulic cylinder, a wedge-shaped force transmission block, a moving block and a force fork, wherein: the force fork is placed on the thyristor crimping point of the converter valve, and the moving block is fixedly connected to the force fork ; The wedge-shaped force-transmitting block is arranged on the piston end of the hydraulic cylinder, and the wedge-shaped force-transmitting block can move between two adjacent moving blocks to stretch the two adjacent moving blocks piece. The utility model has the characteristics of short time consumption and high efficiency, so as to improve the safety and stability of the converter station during operation.

Description

A valve block opening tool for a converter valve

technical field

The utility model relates to the technical field of overhaul and maintenance of converter valve equipment in a converter station, in particular to a converter valve valve group opening tool.

Background technique

In the DC transmission system, the converter valve is responsible for the AC-DC conversion, and the most important equipment for realizing the AC-DC conversion is the thyristor in the converter valve. Once the thyristor has a problem, it must be replaced in time, otherwise It may affect the on-off capability of the converter valve.

Domestic converter stations basically adopt the conventional crimping type converter valve assembly structure, and the thyristor is stuck in it. Once the installation is successful, it will be very difficult to replace the thyristor.

In the prior art, the replacement tool of the thyristor is mainly a mechanical replacement device driven by manpower. The original device adopts a gear type or manual pressure structure, which is heavy, requires multiple people to cooperate in use, and requires a lot of manpower to replace the valve assembly. , with a long time, low efficiency. In addition, the number of thyristors in the converter station is more than 2000, the maintenance staff is difficult to work, and if the replacement is not timely, it will have a serious impact on the safe and stable operation of the converter station.

Utility model content

The purpose of this utility model is to overcome the above-mentioned deficiencies of the background technology, and to provide a valve block opening tool for a converter valve to replace the manpower to replace the thyristor.

In order to achieve the above purpose, the utility model provides a converter valve valve group opening tool, the tool includes a hydraulic cylinder, a wedge-shaped force transmission block, a moving block and a force fork, wherein:

The force fork is placed on the thyristor crimping point of the converter valve, and the moving block is fixedly connected to the force fork;

The wedge-shaped force-transmitting block is arranged on the piston end of the hydraulic cylinder, and the wedge-shaped force-transmitting block can move between two adjacent moving blocks to stretch the two adjacent moving blocks .

Optionally, the upper end of the wedge-shaped power transmission block is rectangular, the lower end of the wedge-shaped power transmission block is straight, and the upper end of the wedge-shaped power transmission block and the lower end of the wedge-shaped power transmission block are connected by two intersecting inclined surfaces. , in this way, the contact area between the wedge-shaped force transmission block and the moving block is larger, which can increase the service life of both.

Optionally, the wedge-shaped force-transmitting block is conical, so that the contact area between the wedge-shaped force-transmitting block and the moving block is a straight line, which can speed up the separation efficiency of the moving blocks.

Further, the wedge-shaped power transmission block is screwed on the piston end of the hydraulic cylinder, so that when the wedge-shaped power transmission block is damaged, it can be replaced.

Further, a handle is provided on the cylinder body of the hydraulic cylinder.

Further, the hydraulic cylinder is a manual hydraulic cylinder, and a pressure rod and a return switch are arranged on the body of the hydraulic cylinder.

The beneficial effects brought by the technical solution of the present invention at least include:

The utility model provides a converter valve valve group opening tool, because the force fork is placed on the pressure contact point of the thyristor of the converter valve, the moving block is fixedly connected to the force fork, and the wedge-shaped force transmission block is arranged on the hydraulic pressure On the piston end of the cylinder, the wedge-shaped force-transmitting block can move between two adjacent moving blocks to stretch the two adjacent moving blocks, and then the thyristor can be stretched to facilitate the replacement of the thyristor. Compared with the human-driven mechanical replacement in the prior art, it has the characteristics of time-consuming and high efficiency, so as to improve the safety and stability of the converter station during operation.

Description of drawings

1 is a schematic structural diagram of a converter valve valve block opening tool according to an embodiment of the present utility model;

FIG. 2 is a schematic structural diagram of a wedge-shaped force transmission block in an embodiment of the present invention.

Detailed ways

The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments, but the embodiments should not be construed as limiting the present utility model.

It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial sources unless otherwise specified; in the description of the present utility model , the terms "landscape", "portrait", "top", "bottom", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" The orientation or positional relationship indicated by , "inside", "outside", etc. are based on the orientation or positional relationship shown in the accompanying drawings, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply the indicated device or element. It must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

FIG. 1 is a schematic structural diagram of a converter valve valve group opening tool according to an embodiment of the present invention. Referring to FIG. 1 , a converter valve valve group opening tool according to an embodiment of the present invention includes a hydraulic cylinder 1, a wedge The force transmission block 2, the moving block 3 and the force fork 4, wherein:

The force fork 4 is placed on the thyristor crimping point of the converter valve, and the moving block 3 is fixedly connected to the force fork 4;

The wedge-shaped force-transmitting block 2 is arranged on the piston end of the hydraulic cylinder 1 , and the wedge-shaped force-transmitting block 2 can move between two adjacent moving blocks 3 to spread the two adjacent moving blocks 3 .

The utility model provides a converter valve valve group opening tool, because the force fork is placed on the pressure contact point of the thyristor of the converter valve, the moving block is fixedly connected to the force fork, and the wedge-shaped force transmission block is arranged on the hydraulic pressure On the piston end of the cylinder, the wedge-shaped force-transmitting block can move between two adjacent moving blocks to stretch the two adjacent moving blocks, and then the thyristor can be stretched to facilitate the replacement of the thyristor. Compared with the human-driven mechanical replacement in the prior art, it has the characteristics of time-consuming and high efficiency, so as to improve the safety and stability of the converter station during operation.

Fig. 2 is a schematic structural diagram of a wedge-shaped power transmission block in an embodiment of the present utility model. With reference to Fig. 2, in the embodiment of the present utility model, the upper end of the wedge-shaped power transmission block 2 is rectangular, and the lower end of the wedge-shaped power transmission block 2 is straight and wedge-shaped. The upper end of the force transmission block 2 and the lower end of the wedge-shaped force transmission block 2 are connected by two intersecting inclined surfaces, so that the contact area between the wedge-shaped force transmission block and the moving block is larger, which can increase the service life of both.

In addition, the wedge-shaped force transmission block 2 can also adopt other shapes, such as conical shape, and the contact area between the conical wedge-shaped force transmission block and the moving block can be in a straight line, which can speed up the separation efficiency of the moving block.

In the embodiment of the present invention, the wedge-shaped force transmission block 2 is threadedly connected to the piston end of the hydraulic cylinder 1, and when the wedge-shaped force transmission block 2 is damaged, it can be replaced in time.

Of course, the wedge-shaped force transmission block can also be installed on the piston end of the hydraulic cylinder 1 in other ways, which is not limited in the embodiment of the present invention.

In the embodiment of the present utility model, the cylinder body of the hydraulic cylinder 1 is provided with a handle 5 to facilitate the taking of the hydraulic cylinder, and the hydraulic cylinder 1 can be a manual hydraulic cylinder, which can be operated in a relatively harsh environment. The body is provided with a pressure rod 6 and a return switch 7. By pressing the pressure rod 6, the end of the piston can be extended, and by operating the return switch 7, the end of the piston can be returned.

In the embodiment of the present invention, the bottom of the force receiving fork 4 may be provided with a positioning hole, and the pressure contact point of the thyristor of the converter valve is set in the positioning hole.

The operation steps of the present utility model are:

1. Place the force fork on the thyristor crimping point of the converter valve, determine the placement position of the force fork, and ensure that the recovery switch is in the initial position;

2. Press down the pressure rod repeatedly, the pressure rod is connected with the plunger of the pump body, and the manual force acts on the pressure rod to drive the plunger to reciprocate, generating the pressure of the oil, and the oil will fill the vacuum behind the piston, the cylinder There is a piston at the bottom, when there is fluid in the cylinder, it will force the piston to move downward;

3. The downward movement of the piston will push the wedge-shaped force transmission block to move downward, separate the moving block, drive the force fork to move to both sides, and separate the converter valve to open the valve assembly;

4. After replacing the thyristor, turn off the return switch, the piston returns to the initial position, and the wedge-shaped moving block and the force fork also return to the initial position.

The utility model adopts the hydraulic transmission structure to replace the original manual transmission form, which can greatly reduce manpower, save time, and is simple and portable, and at the same time greatly improves the work efficiency, and greatly helps and improves the on-site maintenance work.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection of the utility model.

Claims (6)

1. a kind of converter valve valve group strutting tool, which is characterized in that the tool include hydraulic cylinder (1), wedge shaped force transfer block (2), Movable block (3) and stress fork (4), in which:

The stress fork (4) is placed on the silicon-controlled crimping point of converter valve, and the movable block (3) is fixedly connected on the stress fork (4) on；

The wedge shaped force transfer block (2) is arranged on the piston end of the hydraulic cylinder (1), and the wedge shaped force transfer block (2) can be adjacent Two movable blocks (3) between move, to strut the movable block (3) of adjacent two.

2. a kind of converter valve valve group strutting tool according to claim 1, which is characterized in that the wedge shaped force transfer block (2) Upper end be in rectangle, the lower end of the wedge shaped force transfer block (2) is linear, the upper end of the wedge shaped force transfer block (2) and the wedge shape The inclined-plane connection that the lower end of force-transmitting block (2) passes through two intersections.

3. a kind of converter valve valve group strutting tool according to claim 1, which is characterized in that the wedge shaped force transfer block (2) In cone.

4. a kind of converter valve valve group strutting tool according to claim 1-3, which is characterized in that the wedge shape passes Power block (2) is threaded on the piston end of the hydraulic cylinder (1).

5. a kind of converter valve valve group strutting tool according to claim 1-3, which is characterized in that the hydraulic cylinder (1) handle (5) are provided with cylinder.

6. a kind of converter valve valve group strutting tool according to claim 1-3, which is characterized in that the hydraulic cylinder (1) it is hand-hydraulic cylinder, compression bar (6) and return switch (7) is provided with the hydraulic cylinder (1).