CN218626778U

CN218626778U - Detachable modularization combustion engine exhaust-heat boiler

Info

Publication number: CN218626778U
Application number: CN202223178354.4U
Authority: CN
Inventors: 蔡翱亦
Original assignee: Jiangsu Huanan New Energy Technology Co ltd
Current assignee: Jiangsu Huanan New Energy Technology Co ltd
Priority date: 2022-11-29
Filing date: 2022-11-29
Publication date: 2023-03-14
Anticipated expiration: 2032-11-29

Abstract

The application discloses detachable modularization combustion engine exhaust-heat boiler, it includes the evaporation case, the superheater, the feed-tank and the pipe of discharging fume, the feed-tank intercommunication is connected on the evaporation case, set up the air inlet with the feed-tank intercommunication on the evaporation case, the pipe intercommunication of discharging fume is connected on the feed-tank, the superheater sets up on the vertical lateral wall of evaporation case, still including the first connecting elements who is used for connecting evaporation case and superheater, the superheater is connected with first connection frame towards one side of evaporation case, first connecting elements include the sliding block with evaporation case sliding connection, the sliding block respectively is provided with one in the relative both sides of air inlet, two sliding grooves have been seted up on the evaporation case, two sliding grooves set up with two sliding block one-to-ones, set up the connect hole with the sliding block one-to-ones on the first connection frame. This application has easy to assemble, shortens the effect in man-hour.

Description

Detachable modularization combustion engine exhaust-heat boiler

Technical Field

The application relates to the technical field of exhaust-heat boiler manufacturing, in particular to a detachable modularized gas turbine exhaust-heat boiler.

Background

A waste heat boiler is a boiler that utilizes sensible heat in exhaust gas, waste materials, or waste liquids in various industrial processes or heat generated after combustion of combustible materials thereof. Compared with a conventional boiler, the waste heat boiler is based on convection heat transfer, does not need a combustion system and does not need a fan.

At present, the structure of a common waste heat boiler comprises an evaporation box, a smoke exhaust pipe, a water supply box and a superheat box, wherein the water supply box is communicated and connected to the top end of the evaporation box, the smoke exhaust pipe is communicated and connected to the top end of the water supply box, the superheat box is communicated and connected with the evaporation box, and a horizontal partition plate is arranged in the evaporation box. The evaporation box is provided with an upper steam pocket, a lower steam pocket and a convection tube bundle which is communicated and connected between the upper steam pocket and the lower steam pocket. A heater is arranged in the water supply tank and is communicated and connected with the upper steam pocket through a pipeline. The superheater is arranged in the superheater box, and the superheater is communicated and connected with the upper steam drum.

In the process of utilizing waste heat, high-temperature flue gas enters the inside of the evaporation box through the superheat box, the high-temperature flue gas exchanges heat with the convection tube bundle in the inside of the evaporation box, the flue gas after heat exchange enters the water supply box and exchanges heat with the heater, and finally the flue gas is discharged out of the boiler through the smoke discharge pipe. Injecting water to be heat exchanged into a heater, absorbing heat by hot water in the water and flowing into an upper steam drum, enabling water in the upper steam drum to enter a lower steam drum through a convection tube bundle and exchange heat with high-temperature flue gas in an evaporation tank, and enabling saturated steam in the upper steam drum to enter a superheater to absorb heat to form superheated steam.

In view of the above related technologies, the inventor thinks that the exhaust-heat boiler of the combustion engine needs to be sequentially installed and manufactured among the evaporation tank, the superheat tank, the water supply tank and the smoke exhaust pipe in the production and manufacturing process, and the evaporation tank, the superheat tank, the water supply tank and the smoke exhaust pipe are connected by welding, so that the installation time of the exhaust-heat boiler is long, and the installation efficiency of the exhaust-heat boiler is reduced.

SUMMERY OF THE UTILITY MODEL

In order to facilitate the installation of exhaust-heat boiler, reduce exhaust-heat boiler's preparation man-hour, this application provides a detachable modularization gas turbine exhaust-heat boiler.

The application provides a detachable modularization combustion engine exhaust-heat boiler adopts following technical scheme:

the utility model provides a detachable modularization combustion engine exhaust-heat boiler, includes evaporation tank, superheater, water-feeding box and discharges fume the pipe, the water-feeding box intercommunication connect in on the evaporation tank, set up on the evaporation tank with the air inlet of water-feeding box intercommunication, discharge fume the pipe intercommunication connect in on the water-feeding box, the superheater set up in on the vertical lateral wall of evaporation tank, still including being used for connecting the evaporation tank with the first connecting element of superheater, the superheater orientation one side of evaporation tank is connected with first link, first connecting element include with evaporation tank sliding connection's sliding block, the sliding block is in the relative both sides of air inlet respectively are provided with one, set up two sliding groove on the evaporation tank, two sliding groove and two sliding block one-to-one sets up, set up on the first link with sliding block one-to-one's connect hole, two sliding block one side that deviates from each other has seted up the joint groove, works as sliding block slides to two when the one end that sliding groove kept away from each other, the link joint in the joint groove.

Through adopting above-mentioned technical scheme, with two connect the via hole and two sliding blocks one-to-one when installing the superheat box, two sliding blocks pass first carriage through connect the via hole, and the sliding block slides, makes first carriage joint in the joint groove, has realized being connected of first carriage and evaporation case. Through mutually supporting of evaporating case, superheater, feed-water tank, first connecting element and exhaust pipe, realized making simultaneously and the installation to each part of exhaust-heat boiler, have easy to assemble, shorten man-hour effect.

Optionally, a return spring is arranged in the sliding groove along the length direction, one end of the return spring is connected to the inner wall of the sliding groove close to one end of the air inlet, the other end of the return spring is connected to the sliding block, and the sliding block is tightly abutted to the inner wall of one end of the sliding groove.

Through adopting above-mentioned technical scheme, reset spring's setting has realized the automatic re-setting to the sliding block, has reduced the possibility that takes place the separation between sliding block and the first linking frame.

Optionally, one end of the sliding block, which is far away from the sliding groove, is arranged in an inclined plane.

Through adopting above-mentioned technical scheme, the superheat box impels towards the direction of evaporation case, and connect the inner wall of through hole and the inclined plane butt of sliding block, two sliding blocks slide towards the direction that is close to each other along with the extrusion of connect the through hole inner wall, have made things convenient for operating personnel to the installation of superheat box.

Optionally, be provided with upper steam pocket, lower steam pocket and division board in the evaporating box, upper steam pocket with connect through convection bank intercommunication between the lower steam pocket, the division board level set up in the evaporating box, parallel arrangement has overlap plate and plugboard on the inner wall of evaporating box, one side of division board peg graft in the overlap plate with between the plugboard.

Through adopting above-mentioned technical scheme, setting up of overlap joint board and plugboard has realized being connected dismantled between division board and the evaporation tank, when clearing up and overhauing the inside of evaporation tank, can pull down the division board.

Optionally, the insertion plate is provided with a positioning hole, the separation plate is provided with a positioning groove corresponding to the positioning hole, and the positioning hole and the positioning groove are jointly inserted with a positioning pin.

By adopting the technical scheme, the positioning of the partition plate is realized in the society of the positioning pin, and the possibility that the partition plate falls from the insertion plate and the lap plate is reduced.

Optionally, the feed-tank is close to the one end of discharging fume the pipe is connected with the second link frame, discharge fume the pipe orientation the one end of feed-tank is connected with the third link frame, be provided with second coupling assembling on the third link frame, second coupling assembling includes connecting screw, connecting plate, connecting rod butt joint board in addition, connecting screw threaded connection in on the third link frame, connecting screw set up in the third link frame is kept away from the one end of feed-tank, connecting screw keeps away from the one end of third link frame with the connecting plate rotates to be connected, the connecting rod connect in the connecting plate orientation one side of third link frame, butt joint board rotate connect in the connecting rod is kept away from the one end of connecting plate.

By adopting the technical scheme, when the second connecting frame and the third connecting frame are connected, the smoke exhaust pipe is placed on the water supply tank, the butt plate is enabled to rotate to the position below the second connecting frame, the connecting screw rod is rotated, and the butt plate connecting plate moves upwards under the driving of the butt plate connecting plate until the second connecting frame is tightly abutted. The second connecting assembly is arranged to realize detachable connection of the water feeding tank and the smoke exhaust pipe, when the waste heat boiler is manufactured, all parts can be manufactured simultaneously, the second connecting assembly is used for installing the water feeding tank and the smoke exhaust pipe after the waste heat boiler is manufactured, and manufacturing time of the waste heat boiler is further shortened.

Optionally, the first connecting frame is connected with a sealing ring.

Through adopting above-mentioned technical scheme, setting up of sealing washer has reduced the clearance between first linking frame and the evaporating case, has reduced the possibility that high temperature flue gas flows from clearance between the two.

Optionally, an insertion groove is formed in the inner wall of the evaporation box, and the insertion plate is inserted into the insertion groove.

Through adopting above-mentioned technical scheme, the setting of inserting groove has realized being connected with dismantling of evaporating chamber by the plugboard.

In summary, the present application includes at least one of the following beneficial technical effects:

1. through the mutual matching of the evaporation box, the superheat box, the water supply box, the first connecting assembly and the smoke exhaust pipe, the simultaneous manufacturing and installation of all parts of the waste heat boiler are realized, and the effects of convenient installation and working hour shortening are achieved;

2. the second connecting assembly is arranged to realize detachable connection of the water supply tank and the smoke exhaust pipe, and the water supply tank and the smoke exhaust pipe are installed by the second connecting assembly after the components are manufactured, so that the manufacturing time of the waste heat boiler is further shortened;

3. the society of locating pin has realized the location of dividing the division board, has reduced the division board from the possibility that drops between plugboard and the overlap joint board.

Drawings

FIG. 1 is a schematic structural diagram of a detachable modular combustion engine waste heat boiler.

Fig. 2 is a schematic structural diagram for embodying the first connection assembly in the embodiment of the present application.

Fig. 3 is a sectional view for embodying the internal structure of the evaporation tank in the embodiment of the present application.

Fig. 4 is an enlarged view of a portion a in fig. 1.

Fig. 5 is a schematic structural diagram for embodying the partition plate in the embodiment of the present application.

Description of reference numerals: 1. an evaporation tank; 101. an air inlet; 102. a sliding groove; 103. inserting grooves; 2. a superheat box; 3. a water supply tank; 4. a smoke exhaust pipe; 5. a first connection assembly; 51. a first connection frame; 52. a sliding block; 53. a return spring; 54. a clamping groove; 55. a connecting through hole; 6. a second connection assembly; 61. connecting a screw rod; 62. a connecting plate; 63. a connecting rod; 64. a limiting ring; 65. a butt joint plate; 7. a seal ring; 8. an upper steam drum; 9. a steam pocket is arranged; 10. a convection bank; 11. a partition plate; 111. positioning a groove; 12. a lap plate; 13. a plugboard; 131. positioning holes; 14. positioning pins; 15. an access hole; 16. an access panel; 17. a second connection frame; 18. and a third connecting frame.

Detailed Description

The present application is described in further detail below with reference to figures 1-5. The embodiment of the application provides a detachable modularization gas turbine exhaust-heat boiler, it has easy to assemble, shortens the effect in man-hour.

Referring to fig. 1, the detachable modular gas turbine waste heat boiler comprises an evaporation tank 1, a superheat tank 2, a water supply tank 3 and a smoke exhaust pipe 4. The superheater tank 2 is communicated with and arranged on the vertical side wall of the evaporation tank 1, the water supply tank 3 is communicated with and arranged at the top end of the evaporation tank 1, and the smoke exhaust pipe 4 is communicated and connected with the top end of the water supply tank 3. The superheat box 2 is connected with the evaporation box 1 through a first connecting assembly 5, and the water supply box 3 is connected with the smoke exhaust pipe 4 through a second connecting assembly 6.

Referring to fig. 1 and 2, a first connecting frame 51 is fixedly connected to one end of the superheat box 2 close to the evaporation box 1, and an air inlet 101 communicated with the superheat box 2 is formed in the evaporation box 1. The first connecting assembly 5 comprises a sliding block 52 and a return spring 53, the sliding block 52 is slidably disposed on the vertical side wall of the evaporation box 1 close to the superheat box 2, and one sliding block 52 is disposed on each of two sides of the vertical direction of the air inlet 101 of the evaporation box 1. The vertical outer wall of the evaporation box 1 is provided with a sliding groove 102 along the vertical direction, the sliding groove 102 is provided with one on each of two sides of the air inlet 101 in the vertical direction, the two sliding blocks 52 are arranged in one-to-one correspondence with the two sliding grooves 102, and one end of each sliding block 52 is slidably embedded in the sliding groove 102.

Referring to fig. 1 and 2, the return spring 53 is disposed in the sliding slot 102 along the vertical direction, one end of the return spring 53 is fixedly connected to the inner wall of the sliding slot 102 near one end of the air inlet 101, and the other end is fixedly connected to the sliding block 52, and in a natural state, the sliding block 52 abuts against the inner wall of the sliding slot 102 under the action of the return spring 53. The sliding block 52 is provided with a clamping groove 54, the clamping groove 54 is formed in one end, deviating from the air inlet 101, of the sliding block 52, and the width of the clamping groove 54 is equal to the thickness of the first connecting frame 51. Two connecting through holes 55 are formed in the first connecting frame 51, the width of each connecting through hole 55 in the vertical direction is equal to the width of each sliding block 52 in the vertical direction, the two connecting through holes 55 and the two sliding blocks 52 are arranged in a one-to-one correspondence mode, and in a natural state, one side, connected with the reset spring 53, of each sliding block 52 is located between two inner walls of the corresponding connecting through hole 55 in the vertical direction. The end of the sliding block 52 far away from the sliding slot 102 is arranged in an inclined plane, and the inclined planes on the two sliding blocks 52 are arranged in an inclined way away from each other. The first connecting frame 51 is fixedly connected with a sealing ring 7 on one side facing the evaporation box 1.

Referring to fig. 1 and 2, when the superheat box 2 is connected, two connecting through holes 55 and two sliding blocks 52 on the first connecting frame 51 are arranged in a one-to-one correspondence manner, the superheat box 2 is pushed towards the direction of the evaporation box 1, the inner walls of the connecting through holes 55 are abutted to the inclined surfaces of the sliding blocks 52, the two sliding blocks 52 slide in the sliding grooves 102 towards the direction close to each other under the extrusion of the inner walls of the connecting through holes 55, and the return spring 53 extrudes to shorten the accumulated elastic potential energy. When the first connecting frame 51 corresponds to the clamping groove 54 in the vertical direction, the return spring 53 extends to release elastic potential energy, and the two sliding blocks 52 move towards the direction away from each other under the action of the return spring 53 until the first connecting frame 51 is clamped in the clamping groove 54 of the sliding block 52, so that the connection between the superheat box 2 and the evaporation box 1 is realized. The sealing ring 7 is arranged between the evaporation box 1 and the superheat box 2, so that the possibility that hot smoke in the superheat box 2 and the evaporation box 1 flows out from a gap between the superheat box and the superheat box is reduced. The inclined surface of the sliding block 52 is arranged so that the sliding block can move along with the movement of the first connecting frame 51, thereby facilitating the installation of the overheating box 2 by an operator.

Referring to fig. 3-5, the evaporation tank 1 is provided therein with an upper steam drum 8, a lower steam drum 9, and a convection bank 10 connected in communication therebetween. A partition plate 11 is horizontally arranged in the evaporation box 1, and a gap is reserved between the partition plate 11 and the convection bank 10. The partition plate 11 divides the inner cavity of the evaporation box 1 into an upper evaporation cavity and a lower evaporation cavity. Be provided with the faying plate 12 and the plugboard 13 that are parallel to each other on the vertical inner wall of evaporating box 1, faying plate 12 level fixed connection is on the vertical inner wall of evaporating box 1. The vertical inner wall of the evaporation box 1 is provided with a plug-in groove 103 along the horizontal direction, the plug-in groove 103 is positioned above the lapping plate 12, and one side of the plug-in plate 13 in the length direction is plugged in the plug-in groove 103. The distance between the plug board 13 and the lapping board 12 is equal to the thickness of the partition board 11. The lap plate 12 is provided with a positioning hole 131, the top surface of the partition plate 11 is provided with a positioning groove 111 corresponding to the positioning hole 131, the positioning hole 131 and the positioning groove 111 are provided with a plurality of positioning holes 131, and the positioning holes 131 and the positioning grooves 111 are arranged in a one-to-one correspondence manner. When the positioning hole 131 corresponds to the positioning groove 111, the positioning pin 14 is inserted between the two. An access hole 15 is formed in the vertical side wall of the evaporation box 1, and an access plate 16 is connected to the access hole 15 through a bolt.

Referring to fig. 1, 3 and 5, when the interior of the evaporator needs to be cleaned or overhauled, an operator cleans and overhauls the inner cavity of the evaporation box 1 by opening the access panel 16. When the partition plate 11 is installed, one side of the partition plate 11 is placed above the lapping plate 12, the insertion plate 13 is inserted into the insertion groove 103, and the positioning holes 131 correspond to the positioning grooves 111 one by one. After the installation of the split plate 13 and the partition plate 11 is completed, the positioning pin 14 passes through the positioning hole 131 and is inserted into the positioning groove 111, so that the connection between the split plate 11 and the lap plate 12 is realized. The detachable connection and the limitation of the partition plate 11 are realized by the arrangement of the plug board 13 and the positioning pin 14, and the partition plate 11 is detached independently by an operator when the evaporation box 1 is cleaned.

Referring to fig. 4, one end of the water supply tank 3 facing the smoke exhaust pipe 4 is fixedly connected with a second connecting frame 17, one end of the smoke exhaust pipe 4 facing the water supply tank 3 is fixedly connected with a third connecting frame 18, and the second connecting assembly 6 is arranged on the third connecting frame 18. The second connecting assembly 6 includes a connecting screw 61, a connecting plate 62, a connecting rod 63, a limiting ring 64 and an abutting plate 65. The second connecting unit 6 is provided with two sets on the third connecting frame 18. The connecting screw 61 is vertically arranged on one side of the third connecting frame 18 departing from the second connecting frame 17, and the connecting screw 61 is in threaded connection with the third connecting frame 18. Spacing ring 64 is two fixedly connected with on connecting screw 61, and connecting plate 62 rotates the cover and locates on connecting screw 61 and lie in between two spacing rings 64, and the perpendicular fixed connection of connecting rod 63 is in the one side that connecting plate 62 is close to second connecting frame 17, and butt plate 65 rotates to be connected in the one end that connecting rod 63 kept away from connecting plate 62, and butt plate 65 is about connecting plate 62 parallel arrangement.

Referring to fig. 4, when the second connection frame 17 is connected to the third connection frame 18, the second connection frame 17 is aligned to the third connection frame 18, the connection plate 62 and the abutting plate 65 are rotated to make the abutting plate 65 be located below the second connection frame 17, the connection screw 61 is rotated, the abutting plate 65 moves upward under the driving of the connection rod 63 and the connection plate 62 until abutting against the second connection frame 17, and the connection of the second connection frame 17 and the third connection frame 18 is realized. The second connecting assembly 6 is detachably connected between the smoke exhaust pipe 4 and the water supply tank 3, a plurality of parts can be manufactured simultaneously when the waste heat boiler is manufactured and installed, the first connecting assembly 5 and the second connecting assembly 6 are used for installing all the parts, and the reduction of the installation and the manufacturing man-hour of the waste heat boiler is facilitated.

The application principle of a detachable modularization combustion engine exhaust-heat boiler in the embodiment of the application is as follows: when connecting superheat box 2, set up two connect the through hole 55 and two sliding blocks 52 one-to-one on the first link frame 51 to impel superheat box 2 towards evaporation box 1's direction, connect the inclined plane butt of through hole 55's inner wall and sliding block 52, two sliding blocks 52 slide in sliding groove 102 towards the direction that is close to each other under the extrusion of connect the through hole 55 inner wall, reset spring 53 extrudees and shortens the elastic potential energy of collecting. When the first connecting frame 51 corresponds to the clamping groove 54 in the vertical direction, the return spring 53 extends to release elastic potential energy, and the two sliding blocks 52 move towards the direction away from each other under the action of the return spring 53 until the first connecting frame 51 is clamped in the clamping groove 54 of the sliding block 52, so that the connection between the superheat box 2 and the evaporation box 1 is realized.

When the second connection frame 17 and the third connection frame 18 are connected, the second connection frame 17 and the third connection frame 18 are aligned, the connection plate 62 and the abutting plate 65 are rotated to enable the abutting plate 65 to be located below the second connection frame 17, the connection screw 61 is rotated, and the abutting plate 65 moves upwards under the driving of the connection rod 63 and the connection plate 62 until abutting against the second connection frame 17.

When the exhaust heat boiler is manufactured and installed, a plurality of components can be manufactured at the same time, and the first connection unit 5 and the second connection unit 6 are used to install the respective components, which contributes to reduction in the number of installation and manufacturing processes of the exhaust heat boiler.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a detachable modularization combustion engine exhaust-heat boiler, includes evaporating box (1), superheater box (2), feed-tank (3) and discharges fume tub (4), feed-tank (3) intercommunication connect in on evaporating box (1), evaporating box (1) on seted up with air inlet (101) of feed-tank (3) intercommunication, discharge fume tub (4) intercommunication connect in on feed-tank (3), superheater box (2) set up in on the vertical lateral wall of evaporating box (1), its characterized in that: the evaporator is characterized by further comprising a first connecting assembly (5) used for connecting the evaporation box (1) and the superheat box (2), wherein one side, facing the evaporation box (1), of the superheat box (2) is connected with a first connecting frame (51), the first connecting assembly (5) comprises sliding blocks (52) in sliding connection with the evaporation box (1), the two opposite sides of the air inlet (101) are respectively provided with one sliding block (52), the evaporation box (1) is provided with two sliding grooves (102), the two sliding grooves (102) and the two sliding blocks (52) are arranged in a one-to-one correspondence mode, the first connecting frame (51) is provided with connecting through holes (55) in one-to-one correspondence with the sliding blocks (52), one side, facing away from each other, of the two sliding blocks (52) is provided with a clamping groove (54), and when the sliding blocks (52) slide to one end, far away from each other, of the two sliding grooves (102), the connecting frame is clamped in the clamping groove (54).

2. A demountable modular combustion engine waste heat boiler as set forth in claim 1, wherein: a return spring (53) is arranged in the sliding groove (102) along the length direction, one end of the return spring (53) is connected to the inner wall of the sliding groove (102) close to one end of the air inlet (101), the other end of the return spring is connected to the sliding block (52), and the sliding block (52) is tightly abutted to the inner wall of one end of the sliding groove (102).

3. A demountable modular combustion engine waste heat boiler according to claim 2, wherein: one end of the sliding block (52) far away from the sliding groove (102) is arranged in an inclined plane.

4. A demountable modular combustion engine waste heat boiler according to claim 3, wherein: be provided with in evaporation case (1) upper steam pocket (8), lower steam pocket (9) and division board (11), upper steam pocket (8) with connect through convection bank (10) intercommunication between lower steam pocket (9), division board (11) level set up in evaporation case (1), parallel arrangement has overlap plate (12) and plugboard (13) on the inner wall of evaporation case (1), one side of division board (11) peg graft in overlap plate (12) with between plugboard (13).

5. A demountable modular combustion engine waste heat boiler according to claim 4, wherein: the plug board (13) is provided with a positioning hole (131), the partition board (11) is provided with a positioning groove (111) corresponding to the positioning hole (131), and the positioning hole (131) and the positioning groove (111) are jointly plugged with a positioning pin (14).

6. A demountable modular combustion engine waste heat boiler according to claim 5, wherein: feed-tank (3) are close to the one end of discharging fume pipe (4) is connected with second connection frame (17), discharge fume pipe (4) orientation the one end of feed-tank (3) is connected with third connection frame (18), be provided with second coupling assembling (6) on third connection frame (18), second coupling assembling (6) include connecting screw (61), connecting plate (62), connecting rod (63) support board (65) in addition, connecting screw (61) threaded connection in on third connection frame (18), connecting screw (61) set up in third connection frame (18) is kept away from the one end of feed-tank (3), connecting screw (61) are kept away from the one end of third connection frame (18) with connecting plate (62) rotate to be connected, connecting rod (63) connect in connecting plate (62) orientation one side of third connection frame (18), support board (65) rotate connect in connecting rod (63) keep away from the one end of connecting plate (62).

7. A demountable modular combustion engine waste heat boiler according to claim 6, wherein: and the first connecting frame (51) is connected with a sealing ring (7).

8. A demountable modular combustion engine waste heat boiler according to claim 5, wherein: the inner wall of the evaporation box (1) is provided with a plug-in groove (103), and the plug-in plate (13) is plugged in the plug-in groove (103).