Adjustable extra-high voltage AC / DC lead shielding tube fixing device and installation method

Abstract

The invention relates to an adjustable extra-high voltage AC / DC lead shielding tube fixing device and an installation method, an insulating cylinder assembly sleeves a lead shielding tube, the insulating cylinder assembly comprises multiple layers of insulating cylinders, a supporting strip is arranged between every two adjacent insulating cylinders, the lower end of each supporting strip is provided with an inward fixing hook, and the upper end of each supporting strip is provided with an outward fixing hook; a fixing support in the fixing frame assembly is supported and fixed to the inner wall of the ascending flanged base, a supporting support is arranged on the fixing support, adjusting side beams are arranged on the supporting support, the locking assembly comprises an adjusting supporting plate and a hoop, the two ends of the adjusting supporting plate are adjustably installed on the corresponding adjusting side beams respectively, and the hoop is arranged on the adjusting supporting plate. The hoop is installed on the adjusting supporting plate. According to the invention, the creepage distance of the lead shielding tube can be increased in a limited installation space so as to meet the requirement of a higher voltage grade, the installation precision is ensured, the firm fixation of the lead shielding tube can be ensured, and the conditions of lead shielding tube sinking and the like caused by the weight problem can be avoided.

Description

Technical Field

[0001] The invention relates to the technical field of transformer manufacturing, in particular to an adjustable ultra-high voltage AC / DC lead shielding tube fixing device and an installation method. Background Art

[0002] With the development of UHV transmission technology, the length of UHV transmission projects is getting longer and longer, and the transmission power is getting higher and higher. Among them, the high-voltage lead shielding tube is the carrier connecting the transformer body and the external high-voltage circuit. It is the main device to achieve a uniform UHV insulation electric field outside the transformer high-voltage lead. However, with the continuous increase in the length and transmission power of UHV transmission projects, the voltage level, insulation level and capacity of the transformer are also increasing. The insulation pressure on the high-voltage lead shielding tube is also increasing. In addition, due to the limitations of the space distance in the oil tank and the inner wall size of the oil tank high-voltage riser, it cannot be enlarged indefinitely to meet the insulation requirements. Therefore, this puts higher requirements on the design of insulating components. In addition, in terms of fixing the lead shielding tube, it is also necessary to increase the creepage distance between the lead shielding tube and the oil tank or riser electrode to meet the requirements of higher voltage levels.

[0003] From the perspective of installation, at current voltage levels such as AC 1000kV, DC ±800 and ±1100kV, slight installation tolerances of the lead shielding tube will affect the electrode shape at the end of the bushing, thereby causing large electric field distortion. For higher-level UHV power transmission projects, the installation accuracy requirements for the lead shielding tube are more stringent. Therefore, how to ensure the installation accuracy when fixing the lead shielding tube is also a problem that needs to be considered.

[0004] Furthermore, the overall weight of the lead shielding tube used in UHV power transmission projects increases due to the increased thickness of the outer insulation. If the traditional lead shielding tube fixing structure is used, it will be difficult to ensure its reliable fixation, and the lead shielding tube may easily sink due to weight issues. Summary of the invention

[0005] The purpose of the present invention is to provide an adjustable ultra-high voltage AC and DC lead shielding tube fixing device and installation method, which can increase the creepage distance of the lead shielding tube within a limited installation space to meet the requirements of higher voltage levels, and while ensuring the installation accuracy, it can also ensure that the lead shielding tube is firmly fixed, and can avoid the sinking of the lead shielding tube due to weight problems.

[0006] The objective of the present invention is achieved through the following technical solutions:

[0007] An adjustable ultra-high voltage AC and DC lead shielding tube fixing device comprises a fixing frame assembly and an insulating tube assembly, wherein the insulating tube assembly is sleeved on the lead shielding tube, and the insulating tube assembly comprises multiple layers of insulating tubes, and struts are arranged between adjacent insulating tubes, the lower end of the struts is provided with an inward fixing hook, and the upper end is provided with an outward fixing hook, and the inward fixing hook is hung on the lower end of the insulating tube adjacent to the inner side, and the outward fixing hook is hung on the upper end of the insulating tube adjacent to the outer side, the fixing frame assembly comprises a fixing bracket, a supporting bracket and a locking assembly, wherein the fixing bracket is supported and fixed on the inner wall of the lifting seat, the supporting bracket is arranged on the fixing bracket, and an adjustable side beam is arranged on the supporting bracket, and the locking assembly is arranged on The locking assembly comprises an adjusting support plate and a clamp, wherein both ends of the adjusting support plate are respectively mounted on corresponding adjusting side beams, and the clamp is mounted on the adjusting support plate. Adjusting long grooves are arranged on the upper ends of both sides of the adjusting support plate, and locking hole groups are arranged on the lower ends of both sides of the adjusting support plate, and the locking hole groups comprise a plurality of rows of locking holes arranged obliquely. A mounting bolt insertion hole and a locking long groove are arranged on the adjusting side beam at the mounting position corresponding to the adjusting support plate, and the mounting bolt is threadedly inserted into the mounting bolt insertion hole after passing through the adjusting long groove, and the locking bolt is threadedly inserted into any locking hole in the locking hole group, and the free end of the locking bolt is arranged in the locking long groove.

[0008] The support bracket is provided with a plurality of locking components, and the clamps in each locking component group are connected by connecting columns.

[0009] An adjusting side beam is provided on the inner side of the supporting bracket, and a connecting side beam is provided on the outer side of the supporting bracket. The fixed bracket includes a fixed side beam and a fixed cross beam, and both ends of the fixed cross beam are vertically fixedly connected to the corresponding fixed side beams respectively. At the same time, the fixed cross beam is vertically fixedly connected to the connecting side beam, and the fixed side beam is inclined.

[0010] A tightening frame body is arranged on the outer side of the fixing bracket and is supported against the inner wall of the raising seat.

[0011] The support bracket includes a plurality of support beams, and the outer sides of the support beams are vertically fixedly connected to the connecting side beams, and the inner sides of the support beams are vertically fixedly connected to the adjusting side beams.

[0012] The adjusting long groove is arranged along the horizontal direction, the locking long groove is arranged along the vertical direction, and the length of the locking long groove is greater than the height of the locking hole group.

[0013] A method for installing the adjustable UHV AC / DC lead shielding tube fixing device comprises the following steps:

[0014] Step 1: Determine the number of insulating tube layers in the insulating tube assembly, and sequentially sleeve the insulating tubes of each layer in the insulating tube assembly onto the lead shielding tube, and during sleeve sleeve, evenly arrange support bars along the circumferential direction between adjacent insulating tubes, the inward fixing hook at the lower end of the support bar is hooked to the lower end of the insulating tube adjacent to the inner side, and the outward fixing hook at the upper end of the support bar is hooked to the upper end of the insulating tube adjacent to the outer side;

[0015] Step 2: The insulating cylinder assembly is clamped and fixed by the fixing frame assembly, wherein one end of the clamps on the two fixing frame assemblies is fixedly connected, and the other end is tightened and connected by tightening the insulating tape;

[0016] Step 3: Place the lead shielding tube, insulation tube assembly and fixing frame assembly into the lifting seat, and adjust the lateral position of the adjustment support plate in the fixing frame assembly.

[0017] In step three, when the adjustment support plate is adjusted, the mounting bolt is screwed outward but does not disengage from the adjustment side beam, the locking bolt is screwed outward to disengage from the adjustment side beam and the adjustment support plate, and then the adjustment support plate is moved, and when the adjustment support plate moves, the mounting bolt slides relatively in the adjustment long groove, and when the position of the adjustment support plate is determined, the locking bolt is passed through the corresponding locking hole in the locking hole group and inserted into the locking long groove, and then the mounting bolt is tightened to fix the adjustment support plate.

[0018] The advantages and positive effects of the present invention are:

[0019] 1. The length of each layer of insulating tubes in the insulating tube assembly of the present invention decreases from the outside to the inside, which can strengthen the insulation protection and increase the insulation creepage distance of the fixed position of the lead shielding tube. In addition, the support bars evenly distributed along the circumferential direction of the insulating tube assembly of the present invention utilize a fixed hook structure to ensure that the insulating tubes of each layer of the insulating tube assembly are firmly fixed, and also prevent the lead shielding tube from sinking.

[0020] 2. The locking assembly and the supporting bracket of the present invention can be relatively moved and adjusted to ensure installation accuracy, while ensuring that the outer side of the fixed bracket can be against the inner wall of the lifting seat and the support is firm. In addition, the present invention staggeredly arranges the cross beams and side beams in the supporting bracket and the fixed bracket to ensure that the fixed support also has sufficient insulation creepage distance. In addition, the present invention locks and adjusts the position of the support plate through the locking bolt, thereby avoiding the problem of looseness caused by the adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a top view of the present invention in use.

[0022] Figure 2 for Figure 1 The three-dimensional structural diagram of the present invention is shown in FIG.

[0023] Figure 3 for Figure 2 Schematic diagram of the structure of the middle fixing frame assembly,

[0024] Figure 4 for Figure 3 A partial enlarged schematic diagram of the middle adjustment support plate.

[0025] Figure 5 for Figure 4 Schematic diagram of the use status of the middle adjustment support plate,

[0026] Figure 6 for Figure 5 Schematic diagram of the locking hole group in

[0027] Figure 7 for Figure 5 Top view of the middle adjustment side beam,

[0028] Figure 8 for Figure 7 Front view of the middle adjustment side beam,

[0029] Fig. 9 for Figure 2 A top view of the middle insulating barrel assembly,

[0030] Fig.10 for Fig. 9 A cross-sectional view of the middle insulating barrel assembly.

[0031] Among them, 1 is a fixed frame assembly, 101 is a fixed bracket, 1011 is a fixed side beam, 1012 is a fixed cross beam, 1013 is a tightening frame, 102 is a supporting bracket, 1021 is a connecting side beam, 1022 is an adjusting side beam, 10221 is a mounting bolt jack, 10222 is a locking long slot, 103 is a locking assembly, 1031 is an adjusting support plate, 10311 is an adjusting long slot, 10312 is a locking hole group, 1 032 is a clamp, 1033 is a tightening insulating tape, 1034 is a connecting column, 1035 is a mounting shaft, 2 is an inner wall of a riser, 3 is an insulating tube assembly, 301 is a first insulating tube, 302 is a second insulating tube, 303 is a third insulating tube, 304 is a fourth insulating tube, 305 is a first support bar, 306 is a second support bar, 307 is a third support bar, 308 is an inward fixing hook, 309 is an outward fixing hook, and 4 is a lead shielding tube. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] like Figures 1 to 10 As shown, the present invention comprises a fixing frame assembly 1 and an insulating barrel assembly 3, wherein the insulating barrel assembly 3 is sleeved on a lead shielding tube 4, and the insulating barrel assembly 3 is clamped and supported and fixed on an inner wall 2 of a riser by the fixing frame assembly 1.

[0034] like Figures 9-10 As shown, the insulating cylinder assembly 3 includes multiple layers of insulating cylinders that are sequentially mounted, and multiple stays are evenly distributed along the circumferential direction between adjacent insulating cylinders. The lower end of the stay is provided with an inward fixing hook 308, and the upper end of the stay is provided with an outward fixing hook 309, wherein the inward fixing hook 308 at the lower end of the stay is hung on the lower end of the insulating cylinder adjacent to the inner side, and the outward fixing hook 309 at the upper end of the stay is hung on the upper end of the insulating cylinder adjacent to the outer side. Fig.10 As shown, the length of each layer of insulation tubes in the insulation tube assembly 3 decreases from the outside to the inside, which can play a role in strengthening insulation protection and increasing the insulation creepage distance of the fixed position of the lead shielding tube 4. The support bars evenly distributed along the circumferential direction use the fixing hook structure to ensure that the insulation tubes of each layer of the insulation tube assembly 3 are firmly fixed, and also play a role in preventing the lead shielding tube 4 from sinking. Figures 9-10 As shown, in this embodiment, the insulating cylinder assembly 3 is provided with a first insulating cylinder 301, a second insulating cylinder 302, a third insulating cylinder 303 and a fourth insulating cylinder 304 from the outside to the inside, and a first brace 305 is provided between the first insulating cylinder 301 and the second insulating cylinder 302, a second brace 306 is provided between the second insulating cylinder 302 and the third insulating cylinder 303, and a third brace 307 is provided between the third insulating cylinder 303 and the fourth insulating cylinder 304. The number of insulating cylinder layers can be set according to actual needs.

[0035] like Figures 1 to 8 As shown, the fixing frame assembly 1 includes a fixing bracket 101, a supporting bracket 102 and a locking assembly 103, wherein the fixing bracket 101 is supported and fixed on the inner wall 2 of the lifting seat, the supporting bracket 102 is arranged on the fixing bracket 101, and an adjusting side beam 1022 is arranged on the supporting bracket 102, and the locking assembly 103 is arranged on the supporting bracket 102, and the locking assembly 103 includes an adjusting support plate 1031 and a clamp 1032, wherein the two ends of the adjusting support plate 1031 are respectively installed on the corresponding adjusting side beam 1022, and the clamp 1032 is installed on the adjusting support plate 1031. Figures 1-2 As shown, when the present invention is used, the two fixing frame assemblies 1 are arranged at 135 degrees, and one end of the clamp 1032 on the two fixing frame assemblies 1 is fixedly connected, and the other end is tightened and connected by tightening the insulating belt 1033, so as to achieve the purpose of clamping and fixing the insulating tube assembly 3.

[0036] like Figures 4 to 8 As shown, the locking assembly 103 and the supporting bracket 102 can be relatively moved and adjusted laterally, which can ensure the installation accuracy and also ensure that the fixing frame assembly 1 is firmly supported, wherein the upper ends of the two sides of the adjustment support plate 1031 are provided with adjustment long grooves 10311, and the lower ends of the two sides of the adjustment support plate 1031 are provided with locking hole groups 10312, and as shown Figure 6As shown, the locking hole group 10312 includes multiple rows of locking holes arranged obliquely. Figure 7 As shown, the mounting position of the adjusting support plate 1031 on the adjusting side beam 1022 is provided with a mounting bolt insertion hole 10221 and a locking long slot 10222. The present invention uses mounting bolts and locking bolts to fix the two ends of the adjusting support plate 1031 to the corresponding adjusting side beam 1022, wherein the mounting bolt passes through the adjusting long slot 10311 and is threadedly inserted into the mounting bolt insertion hole 10221, the locking bolt is threadedly inserted into any locking hole in the locking hole group 10312, and the free end of the locking bolt is arranged in the locking long slot 10222. Figure 5 As shown, when the locking assembly 103 is adjusted, the mounting bolt is screwed outward but does not disengage from the adjusting side beam 1022. At this time, the mounting bolt no longer presses the adjusting support plate 1031, and the locking bolt is screwed outward to disengage from the adjusting side beam 1022 and the adjusting support plate 1031. At this time, the adjusting support plate 1031 can be moved and adjusted laterally, and when the adjusting support plate 1031 moves, the mounting bolt slides relatively in the adjusting long groove 10311 to ensure that the height of the adjusting support plate 1031 does not change. When the position of the adjusting support plate 1031 is determined, the locking bolt is inserted into the locking long groove 10222 after passing through the corresponding locking hole in the locking hole group 10312, and then the mounting bolt is tightened to press and fix the adjusting support plate 1031. Figure 5 As shown, the adjustment slot 10311 is arranged along the horizontal direction, the locking slot 10222 is arranged along the vertical direction, and the length of the locking slot 10222 is greater than the height of the locking hole group 10312. The present invention locks the position of the adjustment support plate 1031 through the locking bolt, thereby avoiding the problem of loosening after adjustment. In this embodiment, the mounting bolt and the locking bolt are both insulating bolts.

[0037] like Figures 2-3 As shown, in the present invention, multiple groups of locking components 103 can be set on the supporting bracket 102 as needed, wherein the clamps 1032 in each group of locking components 103 are fixed to the corresponding adjustment support plate 1031 through the installation shaft 1035, and each clamp 1032 is connected by a connecting column 1034.

[0038] like Figures 1 to 3As shown, in this embodiment, an adjustable side beam 1022 is provided on the inner side of the support bracket 102, and a connecting side beam 1021 is provided on the outer side of the support bracket 102. The fixed bracket 101 includes a fixed side beam 1011 and a fixed cross beam 1012, and both ends of the fixed cross beam 1012 are respectively vertically fixedly connected to the corresponding fixed side beams 1011, and at the same time, the fixed cross beam 1012 is vertically fixedly connected to the connecting side beam 1021, thereby realizing the connection between the fixed bracket 101 and the support bracket 102, and the fixed side beam 1011 is inclined at a certain angle to achieve support against the inner wall 2 of the lifting seat. In addition, as shown in FIG. Figure 1 As shown, a tightening frame 1013 may be provided on the outside of the fixing bracket 101 as required to support the inner wall 2 of the raising seat.

[0039] like Figures 1 to 3 As shown, in this embodiment, the support bracket 102 includes a plurality of support beams, and the outer side of the support beam is vertically fixedly connected to the connecting side beam 1021, and the inner side of the support beam is vertically fixedly connected to the adjusting side beam 1022. The present invention ensures that the fixed support and the fixing frame assembly 1 have sufficient insulation creepage distance by staggered arrangement of the beams and side beams in the support bracket 102 and the fixing bracket 101.

[0040] The working principle of the present invention is:

[0041] The present invention is installed and comprises the following steps:

[0042] Step 1: Determine the number of insulating tube layers in the insulating tube assembly 3 as needed, and sequentially mount the insulating tubes of each layer in the insulating tube assembly 3 on the lead shielding tube 4, and when mounting, evenly arrange support bars along the circumferential direction between adjacent insulating tubes, and the inward fixing hook 308 at the lower end of the support bar is hung on the lower end of the insulating tube adjacent to the inner side, and the outward fixing hook 309 at the upper end of the support bar is hung on the upper end of the insulating tube adjacent to the outer side;

[0043] Step 2: The insulating tube assembly 3 is clamped and fixed by the fixing frame assembly 1, wherein one end of the clamp 1032 on the two fixing frame assemblies 1 is fixedly connected, and the other end is tightened and connected by tightening the insulating belt 1033;

[0044] Step three: Place the lead shielding tube 4, insulating tube assembly 3 and fixing frame assembly 1 into the lifting seat, and adjust the lateral position of the adjustment support plate 1031 in the fixing frame assembly 1 to ensure the installation accuracy while also ensuring that the outer side of the fixing bracket 101 can be against the inner wall 2 of the lifting seat and supported firmly.

[0045] The length of each layer of insulating tubes in the insulating tube assembly 3 of the present invention decreases from the outside to the inside, which can play a role in strengthening the insulation protection and increasing the insulation creepage distance of the fixed position of the lead shielding tube 4. The support bars evenly distributed along the circumferential direction use a fixed hook structure to ensure that each layer of insulating tubes in the insulating tube assembly 3 is firmly fixed, and also prevent the lead shielding tube 4 from sinking. The locking assembly 103 of the present invention can be relatively moved and adjusted with the support bracket 102 and the fixed bracket 101 to ensure the installation accuracy, and at the same time ensure that the outer side of the fixed bracket 101 can be against the inner wall 2 of the lifting seat and supported firmly. In addition, the present invention staggers the cross beams and side beams in the support bracket 102 and the fixed bracket 101, so as to ensure that the fixed support is fixed while also ensuring that the fixed frame assembly 1 has sufficient insulation creepage distance.

Claims

1. An adjustable UHV AC / DC lead shielding tube fixing device, characterized in that: The invention comprises a fixing frame assembly (1) and an insulating tube assembly (3), wherein the insulating tube assembly (3) is sleeved on a lead shielding tube (4), and the insulating tube assembly (3) comprises a plurality of insulating tubes, wherein a support bar is provided between adjacent insulating tubes, wherein the lower end of the support bar is provided with an inward fixing hook (308), and the upper end of the support bar is provided with an outward fixing hook (309), wherein the inward fixing hook (308) is hung on the lower end of the insulating tube adjacent to the inner side, and the outward fixing hook (309) is hung on the insulating tube adjacent to the outer side. The fixing frame assembly (1) comprises a fixing bracket (101), a supporting bracket (102) and a locking assembly (103), wherein the fixing bracket (101) is supported and fixed on the inner wall (2) of the lifting seat, the supporting bracket (102) is arranged on the fixing bracket (101), and an adjusting side beam (1022) is arranged on the supporting bracket (102), and the locking assembly (103) is arranged on the supporting bracket (102), and the locking assembly (103) comprises an adjusting support plate (1 The adjusting support plate (1031) and the hoop (1032) are respectively mounted on the corresponding adjusting side beams (1022), the hoop (1032) is mounted on the adjusting support plate (1031), the upper ends of both sides of the adjusting support plate (1031) are provided with adjusting long grooves (10311), the lower ends of both sides of the adjusting support plate (1031) are provided with locking hole groups (10312), and the locking hole groups (10312) include a plurality of rows of locking holes arranged obliquely. A tightening hole, a mounting bolt insertion hole (10221) and a locking long groove (10222) are provided on the adjusting side beam (1022) at the mounting position corresponding to the adjusting support plate (1031), and the mounting bolt passes through the adjusting long groove (10311) and is threadedly inserted into the mounting bolt insertion hole (10221), the locking bolt is threadedly inserted into any locking hole in the locking hole group (10312), and the free end of the locking bolt is arranged in the locking long groove (10222).

2. The adjustable UHV AC / DC lead shielding tube fixing device according to claim 1 is characterized in that: The support bracket (102) is provided with a plurality of groups of locking components (103), and the clamps (1032) in each group of locking components (103) are connected via a connecting column (1034).

3. The adjustable UHV AC / DC lead shielding tube fixing device according to claim 1 is characterized in that: An adjusting side beam (1022) is provided on the inner side of the supporting bracket (102), a connecting side beam (1021) is provided on the outer side of the supporting bracket (102), the fixing bracket (101) comprises a fixing side beam (1011) and a fixing cross beam (1012), and both ends of the fixing cross beam (1012) are respectively vertically fixedly connected to the corresponding fixing side beam (1011), and the fixing cross beam (1012) is vertically fixedly connected to the connecting side beam (1021), and the fixing side beam (1011) is arranged obliquely.

4. The adjustable UHV AC / DC lead shielding tube fixing device according to claim 3 is characterized in that: The outer side of the fixed bracket (101) is provided with a tightening frame body (1013) which is supported against the inner wall (2) of the lifting seat.

5. The adjustable UHV AC / DC lead shielding tube fixing device according to claim 1 is characterized in that: The support bracket (102) comprises a plurality of support beams, and the outer sides of the support beams are vertically fixedly connected to the connecting side beams (1021), and the inner sides of the support beams are vertically fixedly connected to the adjusting side beams (1022).

6. The adjustable UHV AC / DC lead shielding tube fixing device according to claim 1 is characterized in that: The adjusting long groove (10311) is arranged along the horizontal direction, the locking long groove (10222) is arranged along the vertical direction, and the length of the locking long groove (10222) is greater than the height of the locking hole group (10312).

7. A method for installing an adjustable UHV AC / DC lead shielding tube fixing device according to claim 1, characterized in that: The steps include: Step 1: Determine the number of insulating tube layers in the insulating tube assembly (3), and sequentially mount the insulating tubes of each layer in the insulating tube assembly (3) on the lead shielding tube (4), and during mounting, evenly arrange support bars along the circumferential direction between adjacent insulating tubes, wherein the inward fixing hook (308) at the lower end of the support bar is hooked to the lower end of the insulating tube adjacent to the inner side, and the outward fixing hook (309) at the upper end of the support bar is hooked to the upper end of the insulating tube adjacent to the outer side; Step 2: The insulating tube assembly (3) is clamped and fixed by the fixing frame assembly (1), wherein one end of the clamps (1032) on the two fixing frame assemblies (1) are fixedly connected, and the other end is tightened and connected by tightening the insulating tape (1033); Step 3: Place the lead shielding tube (4), the insulating tube assembly (3) and the fixing frame assembly (1) into the lifting seat, and adjust the lateral position of the adjustment support plate (1031) in the fixing frame assembly (1).

8. The installation method of the adjustable UHV AC / DC lead shielding tube fixing device according to claim 7 is characterized in that: In step three, when the adjustment support plate (1031) is adjusted, the mounting bolt is screwed outward but does not disengage from the adjustment side beam (1022), and the locking bolt is screwed outward to disengage from the adjustment side beam (1022) and the adjustment support plate (1031), and then the adjustment support plate (1031) is moved. When the adjustment support plate (1031) is moved, the mounting bolt slides relatively in the adjustment long groove (10311). When the position of the adjustment support plate (1031) is determined, the locking bolt is passed through the corresponding locking hole in the locking hole group (10312) and then inserted into the locking long groove (10222), and then the mounting bolt is tightened to fix the adjustment support plate (1031).

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