CN114784656A - A switchgear for easy maintenance - Google Patents

Abstract

The invention discloses a switch cabinet which is convenient for maintenance, comprising a switch cabinet body and a heat dissipation mechanism fixed on both sides of the top of the switch cabinet body. The switch cabinet body includes a first cabinet body and a second cabinet body, and the first cabinet body is located on the second Below the two cabinets, the top of the second cabinet is provided with a cover body, and the heat dissipation mechanism includes a heat dissipation fan. The pull-out method is pulled out from the inside of the second cabinet to facilitate the maintenance of the original electrical components; by designing the first cabinet with the side panels on both sides and the cabinet door that can be opened independently, it is convenient to remove the side panels on the two sides of the first cabinet. It is opened separately from the cabinet door, and the original electrical appliances on its inner wall are inspected; on the one hand, the herringbone-shaped cover can prevent rain and water, and on the other hand, the cover can be opened for inspection, which enhances the ventilation and heat dissipation effect; The cooling fan discharges the heat inside the cabinet in time to prevent damage to the electrical components caused by overheating.

Description

A switchgear for easy maintenance

technical field

The invention mainly relates to the technical field of switch cabinets, in particular to a switch cabinet which is convenient for maintenance.

Background technique

The main function of the switch cabinet is to open and close, control and protect electrical equipment in the process of power generation, transmission, distribution and power conversion in the power system. The components in the switch cabinet are mainly composed of circuit breakers, isolating switches, load switches, operating mechanisms, transformers and various protection devices.

The existing switch cabinet is composed of a fixed chamber cabinet by welding the back plate and the side plates on both sides. The fixed chamber cabinet and the cabinet door form a switch cabinet. The electrical components are placed inside the fixed chamber cabinet, and the head needs to face the fixed chamber cabinet during maintenance. The internal structure can be seen clearly from the inside, and the hands can no longer be reached for maintenance. It is inconvenient to use and repair, especially when the original motor on both sides of the side panels is repaired, the inspection point cannot be accurately repaired, and the maintenance is time-consuming and laborious, and the ventilation is not very good. Well, it is easy to overheat and cause damage to the internal electrical components.

SUMMARY OF THE INVENTION

The present invention mainly provides a switch cabinet which is convenient for maintenance, so as to solve the technical problems raised in the above-mentioned background art.

The technical scheme adopted by the present invention to solve the above-mentioned technical problems is:

A switch cabinet that is easy to maintain, comprising a switch cabinet body and a heat dissipation mechanism fixed on both sides of the top of the switch cabinet body, the switch cabinet body includes a first cabinet body and a second cabinet body, and the first cabinet body is located at the Below the second cabinet body, the top of the second cabinet body is provided with a cover body, and the heat dissipation mechanism includes a heat dissipation fan.

Preferably, the first cabinet body includes a first backboard, the inner wall of the first backboard is provided with a first fixing seat for electrical components, the outer wall of the first backboard is connected with a wall fixing mechanism, and the first backboard is provided with a wall fixing mechanism. A first bottom plate is connected to one side of the bottom of a backplane, a top frame is connected to the top of the first backplane directly above the first bottom plate, and first side plates are symmetrically arranged on both sides of the first backplane. The bottom of the first side plate is connected with the outer walls on both sides of the bottom of the first bottom plate through a rotating shaft, and a first cabinet door is provided on the side of the first cabinet body away from the first back plate, and the bottom of the first cabinet door is It is connected with the outer wall of the first bottom plate away from the first back plate through a rotating shaft.

Preferably, the second cabinet is composed of a second back panel, second side panels on both sides and a second bottom panel, the second back panel, the second side panel and the second bottom panel are fixedly connected, and the second A number of heat dissipation through holes are evenly arranged on the bottom plate, the bottom of the second bottom plate is connected with the top of the top frame, and the second cabinet is provided with an electrical component fixing mechanism, and the electrical component fixing mechanism includes a fixing plate , the fixing plate is arranged in an L-shaped structure, the outer wall of one side of the fixing plate is connected with the inner wall of the second back plate, and the inner wall of the side of the fixing plate close to the second back plate is provided with a second fixing seat for electrical components , the bottom of the fixed plate is provided with draw-out grooves on both sides, each of the draw-out grooves is provided with a pull rod, and the outer wall of one side of the pull rod is connected with the inner wall of the second side plate.

Preferably, the cover body includes a support vertical plate, a first cover plate and a second cover plate, the support vertical plate is arranged in a herringbone structure, and there are two support vertical plates, each of which supports The bottom of the vertical plate is connected to the top of the second cabinet, the cooling fan is located on the supporting vertical plate, the second cover is located on the top of one side of the first cover, and the first cover The inner wall of one side is connected with the top of one side of the second cabinet through a rotating shaft, a first fixing groove is provided on the top of the side of the first cover away from the rotating shaft, and the inner wall of the second cover is connected to the top of the second cabinet through a rotating shaft. The top of one side of the second cabinet is connected to each other, the second cover plate is provided with an engaging groove near the inner wall of the first cover plate, the engaging groove is connected with the first cover plate, and the engaging groove The inner wall is provided with a first fixing block corresponding to the first fixing groove, and the outer walls at both ends of the second cover plate are provided with fastening mechanisms.

Preferably, the outer wall of the second cabinet body is provided with a second cabinet door, the second cabinet door is connected with the inner wall of the second cabinet body through a rotating shaft, and the second cabinet door is provided with a transparent The observation window is provided with a latch on the outer wall of the second cabinet door.

Preferably, the wall fixing mechanism includes a fixing back plate, and third fixing blocks are symmetrically connected to the outer walls on both sides of the fixing back plate, and each of the third fixing blocks is provided with a fixing through hole penetrating therethrough.

Preferably, the fastening mechanism includes a second fixing block, a fixing chute is provided inside the second fixing block, a chain pin is slidably arranged inside the fixing chute, and one end of the chain pin away from the fixing chute is connected to the The outer walls of the supporting vertical plates are connected.

Preferably, each of the top inner wall and side wall of the first side panel is connected to the first back panel through a cabinet door engaging assembly, and the top inner wall and both sides of the first cabinet door are connected to the first cabinet door through a cabinet door engaging assembly. The top frame is connected with the first side plate.

Preferably, the cabinet door engaging assembly includes an engaging base and a limiting base, the engaging base is provided with an engaging block, a limiting column is symmetrically arranged on the limiting base, and the interior of the limiting column is A limit ball is provided, a limit spring is arranged between the limit ball and the inner wall of the bottom of the limit column, one end of the limit spring is connected with the inner wall of the bottom of the limit column, and the other end of the limit spring is connected to the inner wall of the bottom of the limit column. The limiting balls are in contact with each other, and the engaging blocks are engaged between the limiting columns.

Preferably, both the first side panel and the outer wall of the first cabinet door are provided with snap handles.

Compared with the prior art, the beneficial effects of the present invention are:

First, through the pull-out type electric appliance original fixing mechanism designed inside the second cabinet, the electric appliance originals located on the fixing plate can be pulled out from the inside of the second cabinet through a pulling method, which is convenient for the electrical appliances in the second cabinet. Repair the original.

Second, by designing the first cabinet with the side panels on both sides and the cabinet door that can be opened independently, it is convenient to open the side panels and the cabinet door on the first cabinet body separately, and repair the electrical components on the inner wall.

Third, through the design of the herringbone-shaped cover, on the one hand, it can prevent rain and water, and at the same time, the cover can be opened independently, and the electrical components inside the second cabinet can be repaired from the top of the second cabinet, and the other is convenient to strengthen. The ventilation effect is improved to protect the internal electrical components from heat dissipation.

Fourth, the heat inside the first cabinet rises into the second cabinet through the heat dissipation through holes, and the heat inside the second cabinet is discharged in time through the designed cooling fan to prevent damage to the electrical components caused by overheating.

The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is the axonometric view of the switchgear body of the present invention;

2 is a schematic diagram of the internal structure of the switchgear body of the present invention;

FIG. 3 is a schematic diagram of the structure of the cover of the present invention;

Fig. 4 is the enlarged view of A area in Fig. 1 of the present invention;

Fig. 5 is the enlarged view of B area among Fig. 2 of the present invention;

FIG. 6 is a schematic structural diagram of the fixing mechanism of the electrical component of the present invention;

7 is a schematic structural diagram of a cabinet door snap-fit assembly of the present invention;

8 is a schematic diagram of a latch of the present invention;

FIG. 9 is a schematic diagram of the buckle hand of the present invention.

Description of drawings: 1. Switch cabinet body; 11. First cabinet body; 111. First backplane; block; 1123, fixed through hole; 113, first bottom plate; 114, top frame; 115, first side plate; 116, first cabinet door; 1156, buckle handle; 12, second cabinet body; 121, second back plate; 122, the second side plate; 123, the second bottom plate; 1231, the heat dissipation through hole; 124, the fixing mechanism of the original electrical appliance; 1241, the fixing plate; 1242, the second fixing seat of the original electrical appliance; Pull rod; 125, second cabinet door; 1251, transparent observation window; 1252, latch; 13, cover body; 131, supporting vertical plate; 132, first cover plate; 133, second cover plate; 134, first fixing slot ; 135, engaging slot; 136, first fixing block; 137, fastening mechanism; 1371, second fixing block; 1372, fixing chute; 1373, chain latch; 2, cooling mechanism; 21, cooling fan; 3, Cabinet door snap component; 31, snap base; 311, snap block; 32, limit base; 321, limit post; 322, limit ball; 323, limit spring.

Detailed ways

In order to facilitate the understanding of the present invention, the present invention will be described more fully hereinafter with reference to the related drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the description in the text. rather, these embodiments are provided so that this disclosure will be thorough and complete.

It should be noted that when an element is referred to as being "fixed" to another element, it may be directly on the other element or intervening elements may be present, and when an element is referred to as being "connected" to another element, it may be The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for the purpose of illustration only.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated by one of ordinary skill in the technical field of the present invention, and the terminology used herein in the description of the present invention is used for the purpose of describing specific embodiments. For the purpose of, and not intended to limit, the present invention, as used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Please emphatically refer to drawings 1, 2, 3, 5, and 6. In a preferred embodiment of the present invention, a switchgear convenient for maintenance includes a switchgear body 1 and two sides fixed on the top of the switchgear body 1. The switchgear body 1 includes a first cabinet 11 and a second cabinet 12, the first cabinet 11 is located below the second cabinet 12, and the top of the second cabinet 12 is provided with a cover 13 to dissipate heat. The mechanism 2 includes a cooling fan 21; the first cabinet 11 includes a first backboard 111, the inner wall of the first backboard 111 is provided with a first fixing seat 1111 for electrical components, and the outer wall of the first backboard 111 is connected with a wall fixing mechanism 112, a first bottom plate 113 is connected to the bottom side of the first backplane 111, a top frame 114 is connected to the top of the first backplane 111 just above the first bottom plate 113, and two sides of the first backplane 111 are symmetrically provided with a first Side panels 115, the bottom of each first side panel 115 is connected with the outer walls on both sides of the bottom of the first bottom panel 113 through a rotating shaft, and a first cabinet door 116 is provided on the side of the first cabinet 11 away from the first back panel 111. The bottom of the cabinet door 116 is connected with the outer wall of the first bottom plate 113 on the side away from the first back plate 111 through the rotating shaft; The two back plates 121 , the second side plates 122 and the second bottom plate 123 are fixedly connected by welding. A number of heat dissipation through holes 1231 are evenly formed on the second bottom plate 123 , and the heat inside the first cabinet 11 rises through the heat dissipation through holes. 1231 enters the inside of the second cabinet 12, and the heat inside the second cabinet 12 is expelled in time through the designed cooling fan 21 to prevent damage to the electrical components caused by overheating. The bottom of the second bottom plate 123 is connected to the top of the top frame 114. The second cabinet body 12 is provided with a fixing mechanism 124 for the original electrical appliance. The fixing mechanism 124 for the original electrical appliance includes a fixing plate 1241. The fixing plate 1241 is arranged in an L-shaped structure. A second fixing seat 1242 for electrical components is arranged on the inner wall of the side of the plate 1241 close to the second back plate 121. Pulling grooves 1243 are provided on both sides of the bottom of the fixing plate 1241. The outer wall of one side is connected with the inner wall of the second side plate 122; the cover body 13 includes a support vertical plate 131, a first cover plate 132 and a second cover plate 133, the support vertical plate 131 is arranged in a herringbone structure, and the support vertical plate 131 has a total of There are two. The bottom of each support vertical plate 131 is connected to the top of the second cabinet 12. The cooling fan 21 is located on the support vertical plate 131 through the support vertical plate 131. The second cover plate 133 is located on the top of the first cover plate 132. The inner wall of one side of the cover plate 132 is connected to the top of the second cabinet body 12 through the rotating shaft. The top of the first cover plate 132 is provided with a first fixing groove 134 on the side away from the rotating shaft. The tops of the two cabinets 12 are connected on one side, and the second cover 133 is close to the first cover 13 2. The inner wall is provided with an engaging groove 135, the engaging groove 135 is connected with the first cover plate 132, and the inner wall of the engaging groove 135 is provided with a first fixing block 136 corresponding to the first fixing groove 134, and the second cover plate The outer walls of both ends of 133 are provided with fastening mechanisms 137; the fastening mechanism 137 includes a second fixing block 1371, a fixing chute 1372 is opened inside the second fixing block 1371, and a chain pin 1373 is slidably arranged inside the fixing chute 1372. One end of 1373 away from the fixed chute 1372 is connected with the outer wall of the supporting vertical plate 131 .

It should be noted that, in this embodiment, by designing the first cabinet body 11 with the side panels on both sides and the cabinet door that can be opened independently, it is convenient to open the side panels on both sides and the cabinet door on the first cabinet body 11 independently. Overhaul the electrical components on its inner wall;

Further, through the pull-out type electrical component fixing mechanism 124 designed inside the second cabinet 12, the electrical components located on the fixing plate 1241 can be pulled out from the inside of the second cabinet 12 by a drawing method, which is convenient for the second cabinet 12. The electrical components inside the cabinet 12 are overhauled;

Further, by designing the herringbone-shaped cover 13 to prevent rain and water on the one hand, the cover 13 can be opened independently, and the internal electrical components of the second cabinet 12 can be repaired from the inner top of the second cabinet 12. Another convenience strengthens the ventilation effect and protects the internal electrical components from heat dissipation;

Further, the heat inside the first cabinet 11 rises and enters the second cabinet 12 through the heat dissipation through holes 1231, and the heat inside the second cabinet 12 is discharged in time through the designed cooling fan 21 to prevent the overheating of the electrical components. damage.

1-9, in another preferred embodiment of the present invention, the outer wall of one side of the second cabinet body 12 is provided with a second cabinet door 125, and the second cabinet door 125 is connected to the second cabinet body 12 through a rotating shaft. The side and inner walls are connected, a transparent observation window 1251 is arranged on the second cabinet door 125, and a latch 1252 is arranged on the outer wall of the second cabinet door 125; A third fixing block 1122 is provided, and each third fixing block 1122 is provided with a fixing through hole 1123; Connection, the top inner wall and both sides of the first cabinet door 116 are connected to the top frame 114 and the first side panel 115 through the cabinet door snap assembly 3; the cabinet door snap assembly 3 includes a snap base 31 and a limit base 32, An engaging block 311 is arranged on the engaging base 31 , a limiting column 321 is symmetrically arranged on the limiting base 32 , a limiting ball 322 is arranged inside the limiting column 321 , and a limiting ball 322 is arranged between the limiting ball 322 and the inner wall of the bottom of the limiting column 321 . A limit spring 323, one end of the limit spring 323 is connected with the bottom inner wall of the limit column 321, the other end of the limit spring 323 is connected with the limit ball 322, and the engaging block 311 is engaged between the limit columns 321; the first side Both the board 115 and the outer wall of the first cabinet door 116 are provided with buckles 1156 .

It should be noted that, in this embodiment, by opening the second cabinet door 125, the electrical components on the electrical component fixing mechanism 124 can be pulled out by pulling;

Further, by fixing the back plate 1121 and the third fixing block 1122, it is convenient to fix the switch cabinet body 1 to the external wall;

Further, the cover body 13 and the supporting vertical plate 131 are fixed by the fastening mechanism 137 to prevent dust from entering the interior of the first cabinet body 11;

Further, the cabinet door and the side panel can be opened and closed independently through the designed cabinet door engaging assembly 3, which is convenient for the user to check and repair the original electrical appliance.

The concrete flow process of the present invention is as follows:

When in use, the staff places the switch cabinet body 1 on the ground or fixes the switch cabinet body 1 on the wall through the wall fixing mechanism 112 , and turns the first side panel 115 and the first cabinet door 116 open by turning the buckle 1156 to open the first side panel 115 . The original electrical appliance is fixed on the inner wall of the first back panel 111 , the first side panel 115 and the first cabinet door 116 on the first cabinet 11 as required. After fixing, the first side panel 115 and the first cabinet door 116 are turned over and closed. The plug 1252 opens the second cabinet door 125 and pulls out the electrical component fixing mechanism 124 inside the second cabinet 12. The electrical component is fixed on the second fixing seat 1242 of the electrical component on the fixing plate 1241. After the fixed connection is completed, the electrical component is fixed. The mechanism 124 is pushed into the second cabinet body 12 , the second cabinet door 125 is closed, the cooling fan 21 is connected to the external power supply and started, and the pull-out type electric appliance original fixing mechanism 124 designed inside the second cabinet body 12 is fixed. , the electrical components located on the fixed plate 1241 can be pulled out from the inside of the second cabinet 12 by means of pulling, which facilitates the maintenance of the electrical components inside the second cabinet 12. The side panels and cabinets on both sides that can be opened separately are designed The first cabinet body 11 of the door is convenient to open the side panels on both sides of the first cabinet body 11 and the cabinet door separately, and repair the original electrical appliances on its inner wall. At the same time as the rain and water are blocked, the cover body 13 can be opened separately, and the internal electrical components of the second cabinet body 12 can be repaired from the top of the second cabinet body 12, and the ventilation effect can be enhanced to facilitate the heat dissipation protection of the internal electrical components. The heat inside the first cabinet 11 rises and enters the second cabinet 12 through the heat dissipation through holes 1231, and the heat inside the second cabinet 12 is discharged in time through the designed cooling fan 21 to prevent damage to the electrical components caused by overheating.

The present invention has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above manner, as long as the non-substantial improvement of the method concept and technical solution of the present invention is adopted, or the present invention is modified without improvement. If the concept and technical solutions of the invention are directly applied to other occasions, they all fall within the protection scope of the present invention.

Claims (10)

1. The utility model provides a cubical switchboard convenient to overhaul, includes cubical switchboard body (1) and is fixed in heat dissipation mechanism (2) of cubical switchboard body (1) top both sides, a serial communication port, cubical switchboard body (1) is including the first cabinet body (11) and the second cabinet body (12), the first cabinet body (11) are located the below of the second cabinet body (12), the second cabinet body (12) top is provided with lid (13), heat dissipation mechanism (2) are including heat dissipation fan (21).

2. The switch cabinet convenient to overhaul according to claim 1, wherein the first cabinet body (11) comprises a first back plate (111), a first fixing seat (1111) for an electric appliance element is arranged on an inner wall of the first back plate (111), a wall fixing mechanism (112) is arranged on an outer wall of the first back plate (111), a first bottom plate (113) is connected to one side of the bottom of the first back plate (111), a top frame (114) is connected to the position right above the first bottom plate (113) on the top of the first back plate (111), first side plates (115) are symmetrically arranged on two sides of the first back plate (111), the bottom of each first side plate (115) is connected with outer walls on two sides of the bottom of the first bottom plate (113) through a rotating shaft, a first cabinet door (116) is arranged on one side of the first cabinet body (11) away from the first back plate (111), and the bottom of the first cabinet door (116) and the first bottom of the first bottom plate (113) away from the first back plate (111) through a rotating shaft, and the first side door (116) is arranged on the side of the first back plate (111) away from the first back plate (111) ) The outer wall of one side is connected.

3. The switch cabinet convenient to overhaul according to claim 2, wherein the second cabinet body (12) comprises a second back plate (121), two side second side plates (122) and a second bottom plate (123), the second back plate (121), the two side second side plates (122) and the second bottom plate (123) are fixedly connected, a plurality of heat dissipation through holes (1231) are uniformly formed in the second bottom plate (123) in a penetrating manner, the bottom of the second bottom plate (123) is connected with the top of the top frame (114), an electrical element fixing mechanism (124) is arranged inside the second cabinet body (12), the electrical element fixing mechanism (124) comprises a fixing plate (1241), the fixing plate (1241) is arranged in an L-shaped structure, the outer wall of one side of the fixing plate (1241) is connected with the inner wall of the second back plate (121), a second electrical element fixing seat (1242) is arranged on the inner wall of one side of the fixing plate (1241) close to the second back plate (121), drawing grooves (1243) are formed in two sides of the bottom of the fixing plate (1241), a pull rod (1244) is arranged in each drawing groove (1243), and the outer wall of one side of each pull rod (1244) is connected with the inner wall of the second side plate (122).

4. The switch cabinet convenient to overhaul according to claim 1, wherein the cover body (13) comprises two supporting vertical plates (131), a first cover plate (132) and a second cover plate (133), the supporting vertical plates (131) are arranged in a herringbone structure, the bottom of each supporting vertical plate (131) is connected with the top of the second cabinet body (12), the heat dissipation fan (21) is located on the supporting vertical plates (131) in a penetrating manner, the second cover plate (133) is located on the top of one side of the first cover plate (132), the inner wall of one side of the first cover plate (132) is connected with the top of one side of the second cabinet body (12) through a rotating shaft, the top of one side of the first cover plate (132) away from the rotating shaft is provided with a first fixing groove (134), the inner wall of one side of the second cover plate (133) is connected with the top of one side of the second cabinet body (12) through a rotating shaft, the second cover plate (133) is provided with a clamping groove (135) close to the inner wall of the first cover plate (132), the clamping groove (135) is connected with the first cover plate (132) in a clamping mode, a first fixing block (136) corresponding to the first fixing groove (134) is arranged on the inner wall of the clamping groove (135), and fastening mechanisms (137) are arranged on the outer walls of the two ends of the second cover plate (133).

5. The switch cabinet convenient to overhaul according to claim 1, wherein a second cabinet door (125) is arranged on an outer wall of one side of the second cabinet body (12), the second cabinet door (125) is connected with an inner wall of one side of the second cabinet body (12) through a rotating shaft, a transparent observation window (1251) is arranged on the second cabinet door (125), and a bolt (1252) is arranged on an outer wall of the second cabinet door (125).

6. The switch cabinet convenient to overhaul according to claim 2, wherein the wall fixing mechanism (112) comprises a fixing back plate (1121), third fixing blocks (1122) are symmetrically connected to outer walls of two sides of the fixing back plate (1121), and a fixing through hole (1123) penetrates through the inside of each third fixing block (1122).

7. The switch cabinet convenient to overhaul as claimed in claim 4, wherein the fastening mechanism (137) comprises a second fixing block (1371), a fixing sliding slot (1372) is formed in the second fixing block (1371), a chain bolt (1373) is slidably disposed in the fixing sliding slot (1372), and one end of the chain bolt (1373) away from the fixing sliding slot (1372) is connected to the outer wall of the supporting vertical plate (131).

8. The switch cabinet convenient for overhaul according to claim 2, wherein the top inner wall and the side wall of each first side plate (115) are connected to the first back plate (111) through a cabinet door clamping assembly (3), and the top inner wall and two sides of the first cabinet door (116) are connected to the top frame (114) and the first side plate (115) through the cabinet door clamping assembly (3).

9. The switch cabinet convenient to overhaul according to claim 8, wherein the cabinet door engaging component (3) comprises an engaging base (31) and a limiting base (32), an engaging block (311) is disposed on the engaging base (31), limiting posts (321) are symmetrically disposed on the limiting base (32), a limiting ball (322) is disposed inside the limiting post (321), a limiting spring (323) is disposed between the limiting ball (322) and the inner wall of the bottom of the limiting post (321), one end of the limiting spring (323) is connected to the inner wall of the bottom of the limiting post (321), the other end of the limiting spring (323) is connected to the limiting ball (322), and the engaging block (311) is engaged between the limiting posts (321).

10. An easy-to-service switch cabinet according to claim 8, characterized in that the first side plate (115) and the outer wall of the first cabinet door (116) are provided with a handle (1156).

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