A converter valve fault isolation device

Abstract

The utility model relates to a commutating valve technical field discloses a commutating valve fault isolation device, including bottom plate and bearing plate, the top fixedly connected with support column of bottom plate, the outside fixedly connected with current cut -off mechanism of support column, current cut -off mechanism includes rectangle seat, the inside fixedly connected with electric wire of rectangle seat, the inside sliding connection has conducting block of rectangle seat, the top fixedly connected with insulating L type board of conducting block, the top fixedly connected with electric push rod of rectangle seat, the drive end fixedly connected in insulating L type board's bottom of electric push rod. In the utility model, when the electric push rod starts, the insulating L type board moves through the electric push rod drive, and the conducting block moves under the driving of insulating L type board, makes the conducting block and electric wire, the connecting line separate, cuts off the current, can realize the isolation of commutating valve and current quickly, avoids the expansion of fault, and promotes the safety of commutating valve.

Description

Technical Field

[0001] This utility model relates to the field of converter valve technology, and in particular to a converter valve fault isolation device. Background Technology

[0002] Amid the global energy transition and intelligent power upgrade, high-voltage direct current (HVDC) transmission technology, with its significant advantages of large capacity, low loss, and long-distance transmission, has become a core link connecting cross-regional energy bases and load centers. The converter valve, as the "heart" of HVDC transmission, plays a crucial role in efficiently converting alternating current (AC) to direct current (DC), and its performance directly determines the stability, security, and economy of the entire transmission network.

[0003] The converter valve is a core device for DC power transmission. It mainly consists of a valve module, a valve tower frame, a water cooling device, and a control unit. The control unit triggers the thyristor devices to turn on and off, converting AC current into DC current. At the same time, the voltage equalization circuit ensures that the voltage of each device is balanced. The heat sink and water cooling device dissipate the heat generated by the devices during operation in a timely manner, realizing the efficient conversion and transmission of electrical energy.

[0004] In the prior art, some converter valves are prone to frequent failures when operating under high load for a long time and encountering complex working conditions. When a failure occurs, due to the complex design of the internal circuit structure, it is often difficult to achieve rapid and complete disconnection from the current in the first instance. Therefore, a converter valve failure isolation device is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a converter valve fault isolation device, which aims to improve the problem that some converter valves in the prior art are often difficult to quickly disconnect from the current when a fault occurs.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A converter valve fault isolation device includes a base plate and a support plate. A support column is fixedly connected to the top of the base plate, a current cutting-off mechanism is fixedly connected to the outside of the support column, and an isolation mechanism is fixedly connected to the outside of the support plate.

[0008] The current cutting-off mechanism includes a rectangular base, the outer side of which is fixedly connected to the outside of the support column. An electric wire is fixedly connected inside the rectangular base. A conductive block is slidably connected inside the rectangular base. An insulating L-shaped plate is fixedly connected to the top of the conductive block. An electric push rod is fixedly connected to the top of the rectangular base. The driving end of the electric push rod is fixedly connected to the bottom of the insulating L-shaped plate. A connecting wire is slidably connected inside the rectangular base. A valve body assembly is fixedly connected to the outside of the connecting wire.

[0009] As a further description of the above technical solution:

[0010] The isolation mechanism includes an L-shaped connecting plate, which is fixedly connected to the outer side of the bearing plate. A sliding plate is slidably connected inside the L-shaped connecting plate, and a pull plate is fixedly connected to the outside of the sliding plate. A locking component is fixedly connected to the outer side of the L-shaped connecting plate.

[0011] As a further description of the above technical solution:

[0012] The valve body assembly includes a converter plate, the converter plate is fixedly connected to the outside of the connecting line, a support rod is fixedly connected to the inside of the converter plate, and a valve layer shield is fixedly connected to the outside of the converter plate.

[0013] As a further description of the above technical solution:

[0014] The locking assembly includes a U-shaped seat, the outside of which is fixedly connected to the outside of the L-shaped connecting plate, and a plug rod is slidably connected inside the U-shaped seat, the outside of which is slidably connected to the inside of the pull plate;

[0015] As a further description of the above technical solution:

[0016] The bottom of the support rod is fixedly connected to a lower shielding cover, and the bottom of the lower shielding cover is in contact with the top of the bearing plate.

[0017] As a further description of the above technical solution:

[0018] The bottom of the support plate is fixedly connected to a pulley, and the bottom of the pulley is slidably connected to the inner top side of the base plate;

[0019] As a further description of the above technical solution:

[0020] A cylinder is fixedly connected to the top of the base plate, and the driving end of the cylinder is fixedly connected to the outer side of the support plate.

[0021] As a further description of the above technical solution:

[0022] The top of the support rod is fixedly connected to an upper shielding cover, and the top of the support column is fixedly connected to a bracket.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, when a fault occurs, the electric push rod is activated, which drives the insulating L-shaped plate to move. The insulating L-shaped plate moves the conductive block, causing the conductive block to separate from the wires and connecting wires, cutting off the current. This can quickly isolate the converter valve from the current, prevent the fault from escalating, and improve the safety of the converter valve.

[0025] 2. In this utility model, pushing the pull plate causes the slide plate to isolate the converter plate, inserting the rod into the pull plate to lock it, pulling out the rod causes the pull plate to open the slide plate. This enables flexible isolation and exposure of valve body components, facilitating maintenance personnel to quickly carry out maintenance work. At the same time, the locking structure ensures the safety of the equipment during operation, prevents accidental contact from causing protection failure, and improves the overall reliability and maintainability of the device. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of a converter valve fault isolation device proposed in this utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the lower shield of a converter valve fault isolation device proposed in this utility model;

[0028] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0029] Figure 4 This is a schematic diagram of the structure of an L-shaped connecting plate for a converter valve fault isolation device proposed in this utility model.

[0030] Legend:

[0031] 1. Base plate; 2. Support column; 3. Current cutting-off mechanism; 31. Rectangular seat; 32. Wire; 33. Conductive block; 34. Insulating L-shaped plate; 35. Electric push rod; 36. Connecting wire; 37. Valve body assembly; 371. Converter plate; 372. Support rod; 373. Valve layer shield; 4. Bearing plate; 5. Isolation mechanism; 51. L-shaped connecting plate; 52. Slide plate; 53. Pull plate; 54. Locking assembly; 541. U-shaped seat; 542. Insert rod; 6. Lower shield; 7. Pulley; 8. Cylinder; 9. Upper shield; 10. Bracket. Detailed Implementation

[0032] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figures 1 to 3 The present invention provides an embodiment of a converter valve fault isolation device, comprising a base plate 1 and a support plate 4. The base plate 1 serves as the basic support component of the entire device, providing a stable installation reference surface for the converter valve fault isolation device. The support plate 4 is mainly used to support the core component of the valve body assembly 37 and is the installation platform for the converter valve related components. A support column 2 is fixedly connected to the top of the base plate 1. The support column 2 plays the role of longitudinal support and structural connection, providing an installation carrier for the current cutting-off mechanism 3. The current cutting-off mechanism 3 is fixedly connected to the outside of the support column 2, and an isolation mechanism 5 is fixedly connected to the outside of the support plate 4.

[0034] The current cutting-off mechanism 3 includes a rectangular base 31, which serves as the basic mounting housing for the current cutting-off mechanism 3, providing a closed and stable mounting space for the internal wires 32 and conductive blocks 33. The rectangular base 31 is externally fixedly connected to one side of the support column 2. Wires 32 are fixedly connected inside the rectangular base 31, serving as the current transmission carrier for the converter valve. Arranged inside the rectangular base 31, the wires 32 are the current flow channel during normal operation. A conductive block 33 is slidably connected inside the rectangular base 31. The conductive block 33 is the core actuator for the current cutting-off operation, working with the wires 32 and connecting wires 36 to achieve current switching. An insulating L-shaped plate 34 is fixedly connected to the top of the conductive block 33. The insulating L-shaped plate 34 connects the conductive block 33 to the electric push rod 35, serving a dual function of mechanical transmission and electrical insulation. The driving force of the electric push rod 35 is transmitted to the conductive block 33, realizing the sliding displacement of the conductive block 33. The electric push rod 35 is fixedly connected to the top of the rectangular base 31. When the electric push rod 35 is activated, it drives the conductive block 33 to slide inside the rectangular base 31 through the insulating L-shaped plate 34, changing the contact state between the conductive block 33 and the wire 32 and the connecting line 36, thus completing the current cutting-off action. The driving end of the electric push rod 35 is fixedly connected to the bottom of the insulating L-shaped plate 34. The connecting line 36 is slidably connected inside the rectangular base 31. The connecting line 36 serves as a transition transmission component for the current from the rectangular base 31 to the valve body assembly 37. One end is connected to the conductive block 33, and the other end is connected to the converter plate 371 of the valve body assembly 37, realizing the transmission of current from the current cutting-off mechanism 3 to the converter valve body. The valve body assembly 37 is fixedly connected to the outside of the connecting line 36.

[0035] The valve body assembly 37 includes a converter plate 371, which is responsible for realizing the electrical energy conversion and control functions of the converter valve. The converter plate 371 is externally fixedly connected to the outside of the connecting line 36. A support rod 372 is internally fixedly connected to the converter plate 371. The support rod 372 connects the converter plate 371 to the lower shield 6, ensuring the spatial stability of the multi-layer converter plate 371 and maintaining the stacked structure of the valve body assembly 37. A valve layer shield 373 is externally fixedly connected to the converter plate 371. The valve layer shield 373 is the electromagnetic shielding component of the converter valve body assembly 37.

[0036] Reference Figure 1 and Figure 4 The isolation mechanism 5 includes an L-shaped connecting plate 51, which provides an installation carrier for the slide plate 52, the pull plate 53, and the locking component 54. The L-shaped connecting plate 51 is externally fixedly connected to the outer side of the bearing plate 4. The slide plate 52 is slidably connected inside the L-shaped connecting plate 51. The slide plate 52 can isolate the converter plate 371. The pull plate 53 is externally fixedly connected to the slide plate 52. The pull plate 53 facilitates the operation and maintenance personnel to push and pull the slide plate 52 to achieve the sliding of the slide plate 52. The locking component 54 is fixedly connected to the outer side of the L-shaped connecting plate 51.

[0037] The locking assembly 54 includes a U-shaped seat 541, which provides sliding installation space for the insert rod 542. The insert rod 542 can slide inside the U-shaped seat 541 and cooperate with the insertion hole on the pull plate 53 to lock the pull plate 53. The U-shaped seat 541 is externally fixedly connected to the outside of the L-shaped connecting plate 51. The insert rod 542 is slidably connected inside the U-shaped seat 541. When the slide plate 52 is closed in place, the insert rod 542 is inserted to limit the displacement of the pull plate 53 and the slide plate 52. The insert rod 542 is externally slidably connected to the inside of the pull plate 53.

[0038] Reference Figure 1 , Figure 2 and Figure 4 A lower shield 6 is fixedly connected to the bottom of the support rod 372. The lower shield 6 forms an electromagnetic protection barrier at the bottom of the valve body assembly 37 through shielding material. The bottom of the lower shield 6 is in contact with the top of the support plate 4. A pulley 7 is fixedly connected to the bottom of the support plate 4. The pulley 7 converts the sliding friction between the support plate 4 and the base plate 1 into rolling friction, greatly reducing the friction of the support plate 4 when driven by the cylinder 8. The bottom of the pulley 7 is slidably connected to the inner top side of the base plate 1. The top of the base plate 1 is fixedly connected to the cylinder 8. When it is necessary to adjust the mounting... When performing internal maintenance or faulty valve body repair operations, cylinder 8 is activated, driving the support plate 4 to slide along the track of pulley 7 and base plate 1, thereby pulling out and pushing back the valve body assembly 37. The drive end of cylinder 8 is fixedly connected to the outer side of the support plate 4. The top of the support rod 372 is fixedly connected to the upper shield 9, which is the top electromagnetic shielding component of the converter valve body assembly 37. The top of the support column 2 is fixedly connected to the bracket 10, which mainly serves to support and guide the upper pipeline and lines of the converter valve.

[0039] Working principle: When the converter valve is operating normally, the current is transmitted to the converter plate 371 through the wire 32, conductive block 33, and connecting wire 36 to realize the functions of power conversion and control. The valve layer shield 373, lower shield 6, and upper shield 9 form an electromagnetic shielding environment. When the converter valve malfunctions, the electric push rod 35 is activated. The driving end of the electric push rod 35 pushes the insulating L-shaped plate 34. The insulating L-shaped plate 34 drives the conductive block 33 to slide upward in the rectangular seat 31, so that the conductive block 33 is separated from the wire 32 and connecting wire 36, thereby cutting off the current transmission.

[0040] When the valve body assembly 37 needs to be isolated, the operator pushes the pull plate 53, which drives the slide plate 52 to slide. The slide plate 52 isolates the converter plate 371. After the pull plate 53 is inserted into place, the sliding rod 542 slides in the U-shaped seat 541 and can be inserted into the pull plate 53. The position of the slide plate 52 can be locked by fixing 564. Pulling out the rod 542 and sliding the pull plate 53 can open the slide plate 52. The cylinder 8 is started, and the cylinder 8 drives the bearing plate 4 to slide along the track of the base plate 1 with the help of the pulley 7, pushing out the valve body assembly 37 for easy maintenance by the workers.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A converter valve fault isolation device, comprising a base plate (1) and a support plate (4), characterized in that: The top of the base plate (1) is fixedly connected to a support column (2), the outside of the support column (2) is fixedly connected to a current cutting mechanism (3), and the outside of the bearing plate (4) is fixedly connected to an isolation mechanism (5). The current cutting-off mechanism (3) includes a rectangular base (31), the rectangular base (31) is fixedly connected to the outside of the support column (2) on one side, the rectangular base (31) is fixedly connected to the inside of the rectangular base (31), the rectangular base (31) is slidably connected to the inside of the rectangular base (31), the top of the conductive block (33) is fixedly connected to an insulating L-shaped plate (34), the top of the rectangular base (31) is fixedly connected to an electric push rod (35), the driving end of the electric push rod (35) is fixedly connected to the bottom of the insulating L-shaped plate (34), the rectangular base (31) is slidably connected to the inside of the rectangular base (31), and the valve body assembly (37) is fixedly connected to the outside of the connecting line (36).

2. The converter valve fault isolation device according to claim 1, characterized in that: The isolation mechanism (5) includes an L-shaped connecting plate (51), which is externally fixedly connected to the outer side of the bearing plate (4). A sliding plate (52) is slidably connected inside the L-shaped connecting plate (51), and a pull plate (53) is fixedly connected to the outside of the sliding plate (52). A locking component (54) is fixedly connected to the outer side of the L-shaped connecting plate (51).

3. The converter valve fault isolation device according to claim 1, characterized in that: The valve body assembly (37) includes a converter plate (371), the converter plate (371) is fixedly connected to the outside of the connecting line (36), a support rod (372) is fixedly connected to the inside of the converter plate (371), and a valve layer shield (373) is fixedly connected to the outside of the converter plate (371).

4. The converter valve fault isolation device according to claim 2, characterized in that: The locking assembly (54) includes a U-shaped seat (541), which is externally fixedly connected to the outside of the L-shaped connecting plate (51). A plug rod (542) is slidably connected inside the U-shaped seat (541), and the plug rod (542) is externally slidably connected to the inside of the pull plate (53).

5. The converter valve fault isolation device according to claim 3, characterized in that: The bottom of the support rod (372) is fixedly connected to a lower shield (6), and the bottom of the lower shield (6) is in contact with the top of the bearing plate (4).

6. The converter valve fault isolation device according to claim 1, characterized in that: The bottom of the support plate (4) is fixedly connected to a pulley (7), and the bottom of the pulley (7) is slidably connected to the inner top side of the base plate (1).

7. The converter valve fault isolation device according to claim 1, characterized in that: A cylinder (8) is fixedly connected to the top of the base plate (1), and the driving end of the cylinder (8) is fixedly connected to the outer side of the bearing plate (4).

8. A converter valve fault isolation device according to claim 3, characterized in that: The top of the support rod (372) is fixedly connected to an upper shield (9), and the top of the support column (2) is fixedly connected to a bracket (10).

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