CN201332353Y - Support and connection structure of high-voltage DC converter valve - Google Patents

Abstract

The utility model relates to a supporting connection structure of a high-voltage direct current converter valve. The structure includes a bottom converter valve group and at least one upper layer of converter valve groups. A ground support leg composed of supporting insulators is respectively fixed, between the bottom converter valve group and the upper layer converter valve group adjacent to it, and between the upper layer converter valve groups adjacent to it in pairs upwards, between the four valve groups The connecting corners of the valve groups are respectively connected through the middle support legs formed by supporting insulators between the corresponding valve group connecting corners. With the support structure of the above scheme, the support structure is fixed on the ground, so there is no need to build a large-scale suspension system, which reduces the requirements for the valve hall of the converter valve and reduces the construction cost.

Description

A supporting connection structure of a high-voltage DC converter valve

technical field

The utility model relates to a support connection structure of a high-voltage direct-current converter valve, in particular to a high-voltage direct-current converter valve applied to the support structure of a fixed converter valve.

Background technique

At present, the installation structure of most HVDC converter valve towers adopts the suspension structure on the top of the valve hall. Such a suspension structure is generally used in HVDC transmission, because in HVDC transmission, the transmitted power Larger, the number of high-voltage direct current converter valve components required is relatively large. Generally, the height of a single-phase valve tower is about 10 meters. However, in the converter valve, because the number of high-voltage DC converter valve components required is relatively small, the use of a suspended structure is no longer suitable for actual needs. If the suspended structure is still used, the valve hall of the converter valve will be correspondingly The higher the requirements, the construction cost will increase by orders of magnitude.

Utility model content

The purpose of the utility model is to provide a supporting connection structure of a high-voltage direct current converter valve, which is used to overcome the drawbacks of the existing suspension structure, which have high requirements on the valve hall and high construction costs.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a supporting connection structure of a high-voltage direct current converter valve, which includes a bottom converter valve group and at least one upper layer of converter valve groups, and four A ground support leg composed of supporting insulators is respectively fixed under the connection angles of the two valve groups. Between them, at the four valve group connection angles, they are respectively connected by intermediate support legs formed of support insulators between the corresponding valve group connection angles. In actual use, auxiliary support legs are installed on the longitudinal length of the converter valve group to prevent the converter valve group from being deformed due to its own weight. The bottom end of the support insulator of the ground support leg is fixed with a foundation steel plate.

The top of the support insulator of the floor support leg is fixed with a lower support assembly, the lower support assembly is composed of a lower support directly connected to the top of the support insulator of the floor support leg and a fixed connection angle on the lower support for connecting with the valve group. The lower supporting pads fixed below constitute.

The lower end of the middle support leg is fixed with an upper support member fixedly connected to the valve group connection angle of the lower converter valve group, and the upper end of the middle support leg is fixed with a valve group connection angle with the upper converter valve group. The lower support assembly fixed at the bottom of the lower support assembly consists of the lower support directly fixed to the top of the support insulator of the middle support leg and the lower support fixed on the lower support for connection with the lower part of the valve group connection angle Block composition.

The lower support member of the lower support assembly is composed of a flange plate used to connect with the flange bolts on the top of the support insulator, a support channel steel welded on the flange plate and a support block welded at the top of the support channel steel. The middle of the lower support block of the component is fixedly connected to the corresponding support block through the counterbore and the inner square bolt in the counterbore. The lower support block is provided with connecting screw holes, and the number, diameter and position of the connecting screw holes correspond to the corresponding The number, diameter and position of the connection holes on the valve group connection angle correspond to each other.

The upper support member is composed of a flange plate used to connect the flange bolts at the lower end of the supporting insulator, a supporting channel steel welded under the flange plate, and a connecting block welded at the lower end of the supporting channel steel. The connecting block is provided with a connecting block. Holes, the number, diameter and position of the connection holes correspond to the number, diameter and position of the connection holes on the corresponding valve group connection angle.

The upper support, the lower support assembly and the corresponding valve group connection angles are fixedly connected together by stud bolts, and the number and rod diameter of the stud bolts correspond to the number and diameter of the connection holes on the valve group connection angles. , the lower end of each stud bolt is screwed into the corresponding connection screw hole of the corresponding lower support pad and the valve group connection angle and the lower support pad are fastened together through nuts, flat washers, and spring washers. The upper end of the bolt passes through the corresponding connecting hole of the upper support member connection block and the stud bolt and the upper support member are fastened together by nuts, flat washers and spring washers on the stud bolts on both sides of the connection block.

With the support structure of the above scheme, the support structure is fixed on the ground, so there is no need to build a large-scale suspension system, which reduces the requirements for the valve hall of the converter valve and reduces the construction cost.

Description of drawings

Figure 1 is a schematic diagram of the floor support structure of the converter valve;

Figure 2 is a schematic diagram of the three-dimensional structure of the connecting corner of the valve group;

Fig. 3 is a schematic structural view of the utility model equipped with a valve group connection angle;

Fig. 4 is a structural schematic view of the connection angle of the valve group not installed in the utility model.

Detailed ways

As shown in Figures 1, 2, 3, and 4, four studs are welded on the foundation steel plate 13, and are fixedly connected to the flange 6 on the supporting insulator 8 through four sets of nuts, flat washers, and spring washers. Connect the lower support block 17 with the support block 15 welded on the lower support member 7 through hexagon socket bolts to form the lower support assembly 4, and then use bolts, flat washers, and spring washers to pass through the flange on the upper end of the support insulator 8 12 and the flange plate 14 on the lower support member 7 fix the lower support assembly 4 and the support insulator 8 together. Place the converter valve assembly 2 on the support block 17, and fix each valve group connection angle 5 to the lower support assembly 4 with two sets of stud bolts 16 and lock them completely. At this point, the installation of the bottom converter valve group is completed. According to different current requirements, install at least one upper converter valve bank. Fasten the upper support 1 with the lower support assembly 4 through studs, fasten the upper support 1 and the support insulator 9 with bolts, and then install them separately according to the installation method of the bottom converter valve group 2 The lower support assembly 4 and the upper commutation group 3 .

Claims (7)

1. A supporting connection structure of a high-voltage DC converter valve, characterized in that: the structure contains a bottom converter valve group and at least one upper layer of converter valve groups, and the four valve group connection angles of the bottom conversion valve group A ground support leg composed of supporting insulators is respectively fixed under the bottom, between the bottom converter valve group and the upper layer converter valve group adjacent to it, and between the upper layer converter valve groups adjacent to each other in turn, in four The connecting corners of the two valve groups are respectively connected by the intermediate support legs formed by supporting insulators between the corresponding valve group connecting corners. 2. The supporting connection structure according to claim 1, characterized in that: the bottom end of the supporting insulator of the ground supporting leg is fixed with a foundation steel plate. 3. The support connection structure according to claim 1, characterized in that: the top of the support insulator of the floor support leg is fixed with a lower support assembly, and the lower support assembly consists of a lower support assembly directly connected to the top of the support insulator of the floor support leg. The supporting part and the lower supporting pad fixedly connected on the upper part of the lower supporting part are used to be fixedly connected with the lower part of the connecting angle of the valve group. 4. The support connection structure according to claim 1, 2 or 3, characterized in that: the lower end of the middle support leg is fixed with an upper support fixed to the upper side of the valve group connection angle of the lower converter valve group The upper end of the middle support leg is fixed with the lower support assembly fixedly connected to the lower part of the valve group connection angle of the upper converter valve group. The upper part of the lower supporting member is fixedly connected to the lower supporting cushion block for connecting with the lower side of the valve group connection angle. 5. The support connection structure according to claim 4, characterized in that: the lower support member of the lower support assembly is composed of a flange plate for bolt connection with the flange plate at the top of the support insulator, and the flange plate is welded on the top of the flange plate. The support channel steel and the support block welded at the top of the support channel steel are composed of the support block. The middle of the lower support pad of the lower support assembly is fixedly connected with the corresponding support block through the counterbore and the inner square bolt in the counterbore. There are connecting screw holes, and the number, diameter and position of the connecting screw holes correspond to the number, diameter and position of the connecting holes on the corresponding valve block connecting angle. 6. The support connection structure according to claim 5, characterized in that: the upper support member is composed of a flange plate used to connect with the flange plate bolts at the lower end of the support insulator, and a support channel welded below the flange plate and a connecting block welded to the lower end of the supporting channel steel, the connecting block is provided with connecting holes, the number, diameter and position of the connecting holes correspond to the number, diameter and position of the connecting holes on the corresponding valve group connecting angle. 7. The support connection structure according to claim 6, characterized in that: the upper support member, the lower support assembly and the corresponding valve group connection angle are fixed together by stud bolts, and the number of stud bolts The diameter of the rod corresponds to the number and diameter of the connecting holes on the connecting angle of the valve group. The lower end of each stud bolt is screwed into the corresponding connecting screw hole of the corresponding lower support pad and the valve is screwed through the nut, flat washer and spring washer. The group connection angle is fastened together with the lower support block, and the upper end of each stud bolt passes through the corresponding connection hole of the upper support member connection block and passes through the nuts, flat washers and spring washers on the stud bolts on both sides of the connection block Fasten the studs together with the upper support.

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