Substation protection panel cabinet

Abstract

The application discloses a transformer substation protection screen cabinet, which comprises a screen panel, a protection pressing plate and a fixing assembly. The screen panel is provided with spaced rotating shafts and screw rods. One end of the protection pressing plate is rotationally connected with the rotating shafts, and the other end is provided with a clamping notch for clamping the screw rods. The fixing assembly comprises a nut element, a movable clamping plate and a locking element. A threaded hole for screwing the screw rods is formed in a first abutting surface of the nut element. An installation cavity and a sliding groove are arranged in the nut element and are communicated through a communication hole. The movable clamping plate is slidably inserted into the sliding groove through a first opening of the nut, and a first elastic element is arranged between the movable clamping plate and the nut. The locking element is connected with the nut element. When the first abutting surface abuts against the protection pressing plate, the locking element locks the movable clamping plate in the sliding groove. When the first abutting surface is separated from the protection pressing plate, the locking element is separated from the movable clamping plate, and the first elastic element drives the movable clamping plate to pop out. The transformer substation protection screen cabinet can automatically show the connection state of the current protection pressing plate, and the maintenance difficulty is low.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electrical equipment manufacturing, and particularly relates to a transformer substation protection screen cabinet. BACKGROUND

[0002] A large number of protection pressure plates are arranged on the transformer substation protection screen cabinet, the protection pressure plates are the "switches" of the functions of the transformer substation protection screen cabinet, can control the switching of the specific functions of the transformer substation protection screen cabinet, have two states of "switching in" and "switching out", and all the protection pressure plates on the transformer substation protection screen cabinet jointly realize the conversion among four states of "operation", "maintenance", "switching out" and "abnormality" of the transformer substation protection screen cabinet.

[0003] A rotating shaft and a connecting stud are generally arranged on the screen panel of the transformer substation protection screen cabinet corresponding to each protection pressure plate, one end of the protection pressure plate is rotationally connected with the rotating shaft, the other end is provided with a clamping notch, the clamping notch is clamped with the connecting stud, and then a nut is screwed on the connecting stud to realize the connection of the protection pressure plate (i.e. the protection pressure plate is in the switching-in state). In order to ensure that the protection pressure plate can be reliably connected in the connected state, the operation and maintenance personnel will regularly check the connection state of the protection pressure plate. At present, whether the protection pressure plate is connected stably is generally manually screwed by the operation and maintenance personnel. However, due to the large number of protection pressure plates, the checking workload of the operation and maintenance personnel is very large, the maintenance difficulty is increased, and some protection pressure plates need to be screwed by the operation and maintenance personnel to determine the state, which wastes manpower and prolongs the checking time. SUMMARY

[0004] The present application aims to provide a transformer substation protection screen cabinet which automatically shows the connection state of the current protection pressure plate and has low maintenance difficulty.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0006] The present application provides a transformer substation protection screen cabinet, which comprises a screen panel, protection pressure plates and a fixing assembly, a plurality of protection pressure plates are arranged on the screen panel, a rotating shaft and a screw rod are further arranged on the screen panel corresponding to each protection pressure plate, one end of the protection pressure plate is rotationally connected with the rotating shaft, the other end is provided with a clamping notch, the protection pressure plate is clamped with the screw rod through the clamping notch, and the fixing assembly comprises:

[0007] A nut member has a first abutting surface abutting against the protection pressure plate, a threaded hole is formed in the first abutting surface, the screw rod is screwed into the threaded hole, so that the nut member can abut the protection pressure plate on the screen panel, an installation cavity and a sliding groove are further arranged in the nut member, the installation cavity and the sliding groove are communicated through a communication hole, and a first opening and a second opening are formed in the outer peripheral sidewall of the nut member and are respectively communicated with the sliding groove and the installation cavity.

[0008] The movable card plate is inserted into the sliding slot through the first opening, and a first elastic member is arranged between the movable card plate and the sliding slot, and the first elastic member always has a movement tendency to drive the movable card plate to pop out of the sliding slot;

[0009] A locking member is connected with the nut member, and when the first abutting surface abuts against the protection pressing plate, the locking member locks the movable card plate so that the movable card plate is hidden in the sliding slot, and when the first abutting surface is separated from the protection pressing plate, the locking member is separated from the movable card plate, and the first elastic member drives the movable card plate to pop out.

[0010] As a preferred solution of the transformer substation protection screen cabinet, the locking member comprises a locking rod, a first magnet and a second magnet; the first magnet is arranged on the screen panel and surrounds the periphery of the screw rod, the locking rod is movably arranged in the mounting cavity, the first end of the locking rod is connected with the cavity wall of the mounting cavity through a second elastic member, the second end of the locking rod can abut against the movable card plate through the communication hole, the second elastic member always has a movement tendency to drive the locking rod to move away from the sliding slot, so that the locking rod is separated from the movable card plate, the second magnet is connected with the second end, and the first magnet is adsorbed with the second magnet.

[0011] As a preferred solution of the transformer substation protection screen cabinet, the side of the movable card plate close to the locking rod is provided with a clamping groove, and the second end of the locking rod can be clamped into the clamping groove.

[0012] As a preferred solution of the transformer substation protection screen cabinet, a base is arranged on the screen panel, the first magnet is fixed on the side of the base away from the screen panel, the screw rod penetrates through the base and partially protrudes from the side of the base away from the screen panel, the first magnet has a second abutting surface, and the second abutting surface abuts against the side of the protection pressing plate away from the first abutting surface.

[0013] As a preferred solution of the transformer substation protection screen cabinet, the area of the second abutting surface is not less than the area of the first abutting surface.

[0014] As a preferred solution of the transformer substation protection screen cabinet, a first identification color layer is arranged on the side of the movable card plate away from the screen panel.

[0015] As a preferred scheme of the transformer substation protection screen cabinet, a rotating rod is further arranged in the mounting cavity, the rotating rod comprises a rotating shaft, a first rod and a second rod, the first rod and the second rod are connected with the outer periphery of the rotating shaft, the first rod and the second rod are arranged at an included angle, the rotating shaft is rotationally arranged on the cavity wall of the mounting cavity, a third elastic member is arranged between the rotating shaft and the cavity wall of the mounting cavity, and one end of the second rod away from the rotating shaft selectively abuts against the movable clamping plate.

[0016] As a preferred scheme of the transformer substation protection screen cabinet, a first identification color layer is arranged on the side of the movable clamping plate away from the screen panel, and a second identification color layer is arranged on the outer surface of the second rod.

[0017] As a preferred scheme of the transformer substation protection screen cabinet, the end surface of the second rod is an outwardly convex arc surface.

[0018] As a preferred scheme of the transformer substation protection screen cabinet, a guide sleeve is fixedly arranged in the mounting cavity, and the lock rod penetrates through the guide sleeve and is in sliding connection with the guide sleeve.

[0019] The beneficial effects of the present application are as follows: by arranging the movable clamping plate and the locking member, the position of the nut member can be displayed, when the nut member is screwed against the protection pressing plate, the movable clamping plate is hidden in the nut member, at this time, if the maintenance personnel do not see the movable clamping plate pop out, it indicates that the connection state of the protection pressing plate is stable, and the nut member does not need to be screwed; when the nut member is loosened, so that the first abutting surface is separated from the protection pressing plate, the locking member unlocks the movable clamping plate, the movable clamping plate pops out of the nut member, the maintenance personnel can directly see the movable clamping plate, can quickly judge that the connection state of the protection pressing plate is problematic, then the nut member is screwed for maintenance, after the screwing is completed, the movable clamping plate is pressed back into the nut member, at this time, the locking member locks the movable clamping plate again, so as to play a display and reminding role next time the nut member is loosened. BRIEF DESCRIPTION OF DRAWINGS

[0020] The present application will be further described in detail below according to the drawings and embodiments.

[0021] Figure 1 The structure of the transformer substation protection screen cabinet of the embodiment of the present application is shown in the figure.

[0022] Figure 2A partial sectional view schematic diagram of the substation protection screen cabinet of an embodiment of the present application (a schematic diagram of the state in which the movable clamping plate is located in the sliding groove).

[0023] Figure 3 A partial sectional view schematic diagram of the substation protection screen cabinet of an embodiment of the present application (a schematic diagram of the state in which the movable clamping plate is located in the sliding groove). Figure 2

[0024] Figure 4 A partial sectional view schematic diagram of the substation protection screen cabinet of an embodiment of the present application (a schematic diagram of the state in which the movable clamping plate is located in the sliding groove).

[0025] Figure 5 A partial sectional view schematic diagram of the substation protection screen cabinet of an embodiment of the present application (a schematic diagram of the state in which the movable clamping plate is located in the sliding groove).

[0026] Figure 6 A partial sectional view schematic diagram of the substation protection screen cabinet of an embodiment of the present application (a schematic diagram of the state in which the movable clamping plate is located in the sliding groove).

[0027] In the figure:

[0028] 1, screen panel; 2, protection pressing plate; 21, clamping notch; 3, screw rod; 4, nut member; 41, first abutting surface; 42, threaded hole; 43, installation cavity; 44, sliding groove; 45, communication hole; 5, movable clamping plate; 51, clamping groove; 6, locking rod; 7, first magnet; 71, second abutting surface; 8, second magnet; 9, second elastic member; 10, base; 11, first identification color layer; 12, rotating rod; 121, rotating shaft; 122, first rod; 123, second rod; 124, second identification color layer; 13, guide sleeve. DETAILED DESCRIPTION

[0029] The advantages and features of the present application as well as the method of achieving them will become apparent from the following embodiments described in detail below with reference to the accompanying drawings. However, the present application is not limited to the embodiments disclosed below, but can be implemented in various different forms, and the present embodiments are provided only to accomplish the disclosure of the present application and to fully convey the scope of the present application to those skilled in the art, and the present application is limited only by the scope of the claims. The same reference numerals denote the same constituent elements throughout the specification.

[0030] Hereinafter, the present application will be described in detail with reference to the accompanying drawings.

[0031] As Figures 1 to 4 , Figure 6 ​As shown, the substation protection screen cabinet provided by the application comprises a screen panel 1, a protection pressing plate 2 and a fixing assembly. A plurality of protection pressing plates 2 are arranged on the screen panel 1. A rotating shaft and a screw rod 3 are arranged on the screen panel 1 and correspond to each protection pressing plate 2. One end of the protection pressing plate 2 is rotationally connected to the rotating shaft, and the other end is provided with a clamping notch 21. The protection pressing plate 2 is clamped with the screw rod 3 through the clamping notch 21. The fixing assembly comprises a screw cap 4, a movable clamping plate 5 and a locking piece. The screw cap 4 has a first abutting surface 41 abutting against the protection pressing plate 2. A threaded hole 42 is formed in the first abutting surface 41. The screw rod 3 is screwed into the threaded hole 42, so that the screw cap 4 can abut the protection pressing plate 2 on the screen panel 1. An installation cavity 43 and a sliding groove 44 are arranged in the screw cap 4. The installation cavity 43 and the sliding groove 44 are communicated through a communication hole 45. First and second openings are formed in the outer circumferential wall of the screw cap 4 and are communicated with the sliding groove 44 and the installation cavity 43, respectively. The movable clamping plate 5 is slidably inserted into the sliding groove 44 through the first opening. A first elastic piece (not shown in the figure) is arranged between the movable clamping plate 5 and the sliding groove 44. The first elastic piece 44 always has a movement trend of driving the movable clamping plate 5 to pop out of the sliding groove 44. The locking piece is connected with the screw cap 4. When the first abutting surface 41 abuts against the protection pressing plate 2, the locking piece locks the movable clamping plate 5, so that the movable clamping plate 5 is hidden in the sliding groove 44. When the first abutting surface 41 is separated from the protection pressing plate 2, the locking piece is separated from the movable clamping plate 5, and the first elastic piece drives the movable clamping plate 5 to pop out. By arranging the movable clamping plate 5 and the locking piece, the position of the screw cap 4 can be displayed. When the screw cap 4 is screwed to abut against the protection pressing plate 2, the movable clamping plate 5 is hidden in the screw cap 4. At this time, if the maintenance personnel do not see the movable clamping plate 5 pop out, it means that the connection state of the protection pressing plate 2 is stable, and the screw cap 4 does not need to be screwed. When the screw cap 4 is loose, the first abutting surface 41 is separated from the protection pressing plate 2, the locking piece unlocks the movable clamping plate 5, and the movable clamping plate 5 pops out of the screw cap 4. The maintenance personnel can directly see the movable clamping plate 5 and quickly judge that the connection state of the protection pressing plate 2 is problematic. Then, the screw cap 4 is tightened for maintenance. After the screwing is completed, the movable clamping plate 5 is pressed back into the screw cap 4 (or the movable clamping plate 5 is pressed while the screw cap 4 is screwed, or the movable clamping plate 5 is pressed first and then the screw cap 4 is screwed). At this time, the locking piece locks the movable clamping plate 5 again, so as to play a display and reminding role next time the screw cap 4 is loose.

[0032] In the embodiment, the locking member comprises a locking rod 6, a first magnet 7 and a second magnet 8. The first magnet 7 is arranged on the screen panel 1 and surrounds the periphery of the screw rod 3. The locking rod 6 is movably arranged in the mounting cavity 43. The first end of the locking rod 6 is connected with the cavity wall of the mounting cavity 43 through a second elastic member 9. The second end of the locking rod 6 can abut against the movable clamping plate 5 through the communication hole 45. The second elastic member 9 always has a movement tendency to drive the locking rod 6 to move away from the sliding groove 44, so as to separate the locking rod 6 from the movable clamping plate 5. The second magnet 8 is connected with the second end. The first magnet 7 is attracted to the second magnet 8.

[0033] When the first abutting surface 41 of the screw nut member 4 abuts against the protective pressing plate 2, the movable clamping plate 5 is pressed into the sliding groove 44 (or the movable clamping plate 5 is pressed into the sliding groove 44 before the screw nut member 4 is screwed, and then the screw nut member 4 is screwed). Because the first magnet 7 is attracted to the second magnet 8, the second magnet 8 and the locking rod 6 can abut against the movable clamping plate 5 to overcome the elastic force of the second elastic member 9, so that the movable clamping plate 5 does not protrude outside the sliding groove. When the screw nut member 4 is loosened, the first abutting surface 41 does not abut against the protective pressing plate 2, and the distance between the first magnet 7 and the second magnet 8 becomes larger. At this time, the elastic force of the second elastic member 9 is greater than the magnetic attraction force between the first magnet 7 and the second magnet 8. The locking rod 6 is pulled by the second elastic member 9 to completely retract into the mounting cavity 43 and separate from the movable clamping plate 5. The movable clamping plate 5 is popped out of the sliding groove 44 under the elastic force of the first elastic member.

[0034] Preferably, the side of the movable clamping plate 5 close to the locking rod 6 is provided with a clamping groove 51, and the second end of the locking rod 6 can be clamped into the clamping groove 51. By arranging the clamping groove 51, the locking rod 6 can be effectively prevented from slipping with the movable clamping plate 5, so that the movable clamping plate 5 is not popped out when the screw nut member 4 is not loosened. In other embodiments, the side of the movable clamping plate 5 close to the locking rod 6 can be provided with a rough layer to increase the roughness of the movable clamping plate 5 when abutting against the locking rod 6.

[0035] Optionally, a base 10 is arranged on the screen panel 1, the first magnet 7 is fixed on a side of the base 10 away from the screen panel 1, the screw rod 3 penetrates the base 10 and partially protrudes from a side of the base 10 away from the screen panel 1, and the first magnet 7 has a second abutting surface 71 abutting against a side of the protective pressing plate 2 away from the first abutting surface 41. By arranging the first magnet 7 on the side of the base 10 close to the protective pressing plate 2, i.e. the first magnet 7 covers the whole side of the base 10 close to the protective pressing plate 2, the screw cap 4 can make the first magnet 7 and the second magnet 8 effectively magnetically attract no matter how the screw cap 4 is rotated. Of course, in other embodiments, a rotation starting point can be arranged, the screw cap 4 is rotated to face the rotation starting point before being screwed, and the first magnet 7 is arranged to face the position of the second magnet 8 after being screwed. This design can save the use of the first magnet 7 and reduce the cost.

[0036] Preferably, the area of the second abutting surface 71 is not less than the area of the first abutting surface 41. By arranging the area of the second abutting surface 71 to be not less than the area of the first abutting surface 41, the screw cap 4 can have enough magnetic attraction surface to face the second magnet 8 no matter how it is rotated, so that the magnetic attraction force between the first magnet 7 and the second magnet 8 is greater than the elastic force of the second elastic member 9 when being screwed to the position, and the locking rod 6 can abut against the movable clamping plate 5.

[0037] In an embodiment, a first identification color layer 11 is arranged on a side of the movable clamping plate 5 away from the screen panel 1. By arranging the first identification color layer 11, when the screw cap 4 is loose, the movable clamping plate 5 is extended, and the first identification color layer 11 can obviously indicate the unstable connection of the protective pressing plate 2 and remind the maintenance personnel.

[0038] In the embodiment, the color of the first identification color layer 11 is red. The red color is bright and more easily noticeable. In other embodiments, the color of the first identification color layer 11 can also be blue, yellow, pink or other colors as long as the color is different from the color of the screen panel 1.

[0039] In an embodiment, the installation cavity 43 is further provided with a rotating rod 12, the rotating rod 12 comprises a rotating shaft 121, a first rod 122 and a second rod 123, the first rod 122 and the second rod 123 are connected with the outer periphery of the rotating shaft 121, the first rod 122 and the second rod 123 are arranged at an angle, the rotating shaft 121 is rotatably arranged on the cavity wall of the installation cavity 43, a third elastic member (not shown in the figure) is arranged between the rotating shaft 121 and the cavity wall of the installation cavity 43, one end of the second rod 123 away from the rotating shaft 121 selectively abuts against the movable clamping plate 5, when the movable clamping plate 5 is located in the sliding groove 44, one end of the second rod 123 away from the rotating shaft 121 abuts against the movable clamping plate 5, so that the first rod 122 is partially extended out of the installation cavity 43; when the movable clamping plate 5 is extended out of the sliding groove 44, the third elastic member drives the rotating shaft 121 to rotate, so that the first rod 122 is retracted into the installation cavity 43. By arranging the rotating rod 12, the comparison with the movable clamping plate 5 can be formed, and the warning effect is further improved. When the first rod 122 of the rotating rod 12 is extended, the movable clamping plate 5 is hidden in the sliding groove 44, which represents that the nut member 4 is in a tightened state, and the connection state of the protection pressing plate 2 is stable; when the first rod 122 of the rotating rod 12 is retracted into the installation cavity 43, the movable clamping plate 5 is extended, which represents that the nut member 4 is in a loosened state, and the connection state of the protection pressing plate 2 is unstable.

[0040] Preferably, the second rod 123 is provided with a second identification color layer 124, the color of the first identification color layer 11 is different from the color of the second identification color layer 124. In this embodiment, the color of the first identification color layer 11 is red, and the color of the second identification color layer 124 is green. Red and green are the most contrasting colors, so the warning effect can be greatly improved.

[0041] In an embodiment, the end surface of the second rod 123 is an outward convex arc surface. By arranging the end surface of the second rod 123 as an outward convex arc surface, the friction between the second rod 123 and the movable clamping plate 5 can be reduced, and the service life of the movable clamping plate 5 and the second rod 123 can be prolonged.

[0042] In this embodiment, when the movable clamping plate 5 is extended to the outside of the sliding groove 44, the end surface of the second rod 123 abuts against the bottom surface of the movable clamping plate 5, and when the movable clamping plate 5 is retracted into the sliding groove 44, the end surface of the second rod 123 abuts against the side surface of the movable clamping plate 5 close to the locking rod 6. This design can ensure that when the movable clamping plate 5 is pressed from the outside of the sliding groove 44 back into the sliding groove 44, it can simultaneously drive the second rod 123 to rotate around the rotating shaft 121 against the elastic force of the third elastic member, so that the first rod 122 is retracted into the installation cavity 43.

[0043] In an embodiment, asFigure 5 As shown, a guide sleeve 13 is fixedly arranged in the mounting cavity 43, and the lock rod 6 penetrates through the guide sleeve 13 and is in sliding connection with the guide sleeve 13. By arranging the guide sleeve 13, the movement of the lock rod 6 can be guided, so that the second end of the lock rod 6 can be accurately clamped into the clamping groove 51.

[0044] Although embodiments of the present application have been described above with reference to the drawings, the present application is not limited to the above embodiments, but can be manufactured in various forms, and those skilled in the art will understand that the present application can be implemented in other specific forms without changing the technical spirit or essential characteristics of the present application. Therefore, it should be understood that the above-described embodiments are exemplary in all aspects and are not limiting.

Claims

1. A transformer substation protection panel cabinet, comprising a panel and a protection plate, a plurality of said protection plates are arranged on the panel, a rotating shaft and a screw rod are arranged on the panel corresponding to each said protection plate, one end of the protection plate is rotatably connected with the rotating shaft, and the other end is provided with a clamping notch, the protection plate is clamped with the screw rod through the clamping notch, characterized in that, Also include a fixing assembly; the fixing assembly includes: A nut element with a first abutting surface abutting the protective pressing plate, the first abutting surface is provided with a threaded hole, the threaded hole is screwed into the screw rod, so that the nut element can abut the protective pressing plate on the screen panel, the nut element is further provided with a mounting cavity and a sliding slot, the mounting cavity and the sliding slot are communicated through a communication hole, and the outer peripheral wall of the nut element is provided with a first opening and a second opening respectively communicating with the sliding slot and the mounting cavity; A movable clamping plate is slidably inserted into the sliding slot through the first opening, a first elastic element is arranged between the movable clamping plate and the sliding slot, the first elastic element always has a movement trend to drive the movable clamping plate to pop out of the sliding slot; A locking element connected with the nut element, when the first abutting surface abuts the protective pressing plate, the locking element locks the movable clamping plate, so that the movable clamping plate is hidden in the sliding slot, when the first abutting surface is separated from the protective pressing plate, the locking element is separated from the movable clamping plate, and the first elastic element drives the movable clamping plate to pop out; The mounting cavity is further provided with a rotating rod, the rotating rod includes a rotating shaft, a first rod and a second rod, the first rod and the second rod are connected with the outer periphery of the rotating shaft, and the first rod and the second rod are arranged at an angle, the rotating shaft is rotatably arranged on the cavity wall of the mounting cavity, a third elastic element is arranged between the rotating shaft and the cavity wall of the mounting cavity, one end of the second rod away from the rotating shaft selectively abuts against the movable clamping plate, when the movable clamping plate is located in the sliding slot, one end of the second rod away from the rotating shaft abuts against the movable clamping plate, so that the first rod is partially extended out of the mounting cavity through the second opening; when the movable clamping plate extends out of the sliding slot, the third elastic element drives the rotating shaft to rotate, so that the first rod is retracted into the mounting cavity.

2. The substation protection panel cabinet of claim 1, wherein, The locking element includes a locking rod, a first magnet and a second magnet; the first magnet is arranged on the screen panel and surrounds the peripheral portion of the screw rod, the locking rod is movably arranged in the mounting cavity, the first end of the locking rod is connected with the cavity wall of the mounting cavity through a second elastic element, the second end of the locking rod can abut against the movable clamping plate through the communication hole, the second elastic element always has a movement trend to drive the locking rod to move away from the sliding slot, so that the locking rod is separated from the movable clamping plate, the second magnet is connected with the second end, and the first magnet and the second magnet are attracted to each other.

3. The substation protection panel cabinet of claim 2, wherein, The side of the movable clamping plate close to the locking rod is provided with a clamping groove, and the second end of the locking rod can be clamped into the clamping groove.

4. The substation protection panel cabinet of claim 2, wherein, The screen panel is provided with a base, the first magnet is fixed on the side of the base away from the screen panel, the screw rod penetrates through the base and partially protrudes from the side of the base away from the screen panel, the first magnet has a second abutting surface, and the second abutting surface abuts against the side of the protective pressing plate away from the first abutting surface.

5. The substation protection panel cabinet of claim 4, wherein, The area of the second abutting surface is not less than the area of the first abutting surface.

6. The substation protection panel cabinet of claim 1, wherein, The movable card plate is provided with a first identification color layer on the side away from the screen panel.

7. The substation protection panel cabinet of claim 1, wherein, The movable card plate is provided with a first identification color layer on the side away from the screen panel, and a second identification color layer is provided on the outside of the second rod, and the color of the first identification color layer is different from the color of the second identification color layer.

8. The substation protection panel cabinet of claim 1, wherein, The end surface of the second rod is an outwardly convex arc surface.

9. The substation protection panel cabinet according to any one of claims 2 to 5, characterized in that, A guide sleeve is fixedly arranged in the mounting cavity, and the lock rod penetrates through the guide sleeve and is in sliding connection with the guide sleeve.

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