Assembly type laminated slab surface joint connecting component

Abstract

The invention discloses an assembly type laminated plate surface joint connecting component, and relates to the technical field of connecting components, the assembly type laminated plate surface joint connecting component comprises connecting seats arranged on a floor formwork, the connecting seats are connected end to end, and connecting grooves are formed in the tops of the connecting seats; the expansion air bag is arranged in the connecting groove; the extrusion air bag is arranged in the connecting seat, and the connecting seat is provided with a breather pipe which is communicated with the extrusion air bag and the expansion air bag; the power column slides on the connecting seat up and down, and the top of the power column protrudes out of the connecting seat; the extrusion plate is arranged at the bottom of the power column and slides up and down on the connecting seat, and the bottom of the extrusion plate abuts against the top of the extrusion air bag; when the power column slides downwards into the connecting seat, the extrusion plate extrudes the extrusion air bag, and at the moment, the expansion air bag expands towards the outside of the connecting groove. The number of concrete leakage can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of connection components, and in particular to an assembled composite panel surface seam connection component. Background Art

[0002] Prefabricated composite slabs are building materials made by stacking multiple materials (such as reinforced concrete, thermal insulation materials, steel, etc.) through a mechanized process. Their structure is mainly composed of a surface layer, an insulation layer, a skeleton layer, and connectors.

[0003] When assembling the composite slab, first transport the composite slab to the construction site, then lift the composite slab to the top of the floor formwork through the lifting equipment, at this time the reserved steel bar segments on both sides of the composite slab are connected to the crossbeam steel cages on both sides; then tie the steel bar segments of the composite slab to the crossbeam steel cages, and finally pour concrete at the connection between the steel bar segments of the composite slab and the crossbeam steel cages, as well as the top of the composite slab.

[0004] However, during production, there will inevitably be some uneven areas on the bottom end surface of the composite board. At this time, concrete can easily penetrate into the gap between the composite board surface and the formwork, thereby affecting the quality of the project and increasing the burden of subsequent cleaning work. Summary of the invention

[0005] In order to reduce the amount of concrete leakage, the present application provides a prefabricated composite panel surface joint connection component.

[0006] The present application provides a prefabricated composite panel surface joint connection component, which adopts the following technical solution: An assembled composite board surface joint connection component comprises a connection seat arranged on a floor formwork, the connection seat is connected end to end, and a connection groove is formed on the top of the connection seat; An expansion airbag is disposed in the connecting groove; An extrusion airbag is arranged in the connecting seat, and the connecting seat is provided with a vent pipe connecting the extrusion airbag and the expansion airbag; A power column slides up and down on the connecting seat, and the top of the power column protrudes out of the connecting seat; An extrusion plate is arranged at the bottom of the power column and slides up and down on the connecting seat, and the bottom of the extrusion plate abuts against the top of the extrusion airbag; When the power column slides downward into the connecting seat, the extrusion plate squeezes the extrusion airbag, and at this time, the expansion airbag expands toward the outside of the connecting groove.

[0007] By adopting the above technical solution, when assembling the composite board, the composite board is first transported to the construction site, and then the composite board is lifted to the top of the floor formwork by the lifting equipment and lowered. Then the composite board continues to approach the floor formwork under the action of gravity. At this time, the composite board pushes the power column downward, and the power column drives the extrusion plate to move downward. The extrusion plate squeezes the extrusion airbag, so that the gas in the extrusion airbag enters the expansion airbag through the vent pipe. After being compressed, the expansion airbag expands outward and fits tightly to the bottom edge of the composite board, limiting the penetration of concrete into the gap between the composite board and the floor formwork. Through this structural design, the penetration of concrete into the gap between the composite board and the formwork can be effectively limited, thereby improving the quality of the project and reducing the burden of later cleaning work.

[0008] Optionally, a limiting plate is slidably mounted on the top of the connection seat, the limiting plate includes an inner plate and an outer plate, and the connection groove is located between the inner plate and the outer plate; The connecting seat is provided with an elastic driving member, and the elastic driving member drives the inner plate and the outer plate to slide toward the outside of the connecting seat; The connection seat is provided with a limiting column which slides up and down, and the top of the limiting column is connected to the composite plate; The connection seat is provided with a limiting piece, and when the limiting post slides into the connection seat, the limiting piece limits the limiting post from sliding out of the connection seat.

[0009] By adopting the above technical solution, the limiting plate on the top of the connecting seat can move outward from the connecting seat under the action of the elastic driving member, thereby limiting the expansion airbag and reducing the possibility of the expansion airbag squeezing into the gap between the composite plate and the floor formwork when the composite plate squeezes the expansion airbag.

[0010] Optionally, the elastic driving member is a driving spring, and the driving spring is disposed in the connecting seat, and the driving spring drives the inner plate and the outer plate to slide toward the outside of the connecting seat.

[0011] By adopting the above technical solution, the driving spring can effectively push the inner plate and the outer plate to slide outward, so that the limiting plate can better limit the expansion airbag. The driving spring has a simple structure and is easy to use.

[0012] Optionally, the limiting member is a limiting tooth, and the connecting seat is formed with a sliding groove for the limiting column to slide up and down; The limiting teeth are arranged on a vertical groove wall on one side of the sliding groove, and there are a plurality of limiting teeth which are evenly spaced up and down; The side wall of the limiting column is provided with sliding teeth, and the sliding teeth are meshed with the limiting teeth; When the limiting column slides into the connecting seat, the sliding tooth slides on the limiting tooth; When the limiting column slides outward from the connecting seat, the limiting teeth unidirectionally support the sliding teeth.

[0013] By adopting the above technical solution, when the limiting column slides into the connecting seat, the sliding teeth slide on the limiting teeth to ensure that the limiting column smoothly enters the connecting seat; when the limiting column attempts to slide outward, the limiting teeth unidirectionally support the sliding teeth to limit the limiting column from sliding out of the connecting seat, thereby effectively fixing the composite plate, improving the connection stability, and reducing the possibility of an increase in the gap between the composite plate and the floor formwork.

[0014] Optionally, the ventilation pipe is a hose structure, a receiving groove is formed in the connecting seat, and the ventilation pipe passes through the notch of the receiving groove; When the outer wall of the expansion airbag abuts against the overlapping plate and the power column slides into the connecting seat, the ventilation pipe expands into the containing groove.

[0015] By adopting the above technical solution, when the ventilation pipe is a hose structure and a receiving groove is formed in the connecting seat, the ventilation pipe can smoothly expand into the receiving groove when the expansion airbag abuts against the overlapping plate and the power column slides into the connecting seat, which is beneficial for the expansion airbag to abut against the overlapping plate, and the overlapping plate can continue to slide toward the floor formwork.

[0016] Optionally, the connecting seat is provided with a support plate that slides up and down in the accommodating groove, and the connecting seat is provided with an elastic support member that drives the support plate to slide toward the notch of the accommodating groove.

[0017] By adopting the above technical solution, the support plate is supported by the elastic support member, so that the support plate abuts against the force exerted on the wall of the ventilation pipe. At the same time, when the expansion airbag abuts against the composite plate and the composite plate continues to move toward the floor formwork, the ventilation pipe expands into the accommodating groove, so that the composite plate can continue to move toward the floor formwork.

[0018] Optionally, the elastic support member is a support spring, which is installed in the accommodating groove, one end of the support spring abuts against the bottom of the support plate, and the bottom of the support spring abuts against the bottom groove wall of the accommodating groove.

[0019] By adopting the above technical solution, when the elasticity of the support spring is released, the support plate is pushed to move toward the ventilation pipe, so that the support plate can buffer and offset the force of the airflow squeezing the wall of the ventilation pipe.

[0020] Optionally, a limit block is provided on the side wall of the support plate, and a limit groove is formed on the groove wall of the accommodating groove for the limit block to slide up and down; When the limiting block abuts against the bottom groove wall of the limiting groove, the top of the support plate abuts against the bottom outer wall of the ventilation pipe.

[0021] By adopting the above technical solution, the limiting block slides up and down in the limiting groove, which is beneficial to limiting the sliding trajectory of the support plate and limiting the support plate from sliding out of the accommodating groove.

[0022] In summary, the present application includes at least one of the following beneficial effects: 1. When assembling the composite panels, first transport the composite panels to the construction site, then lift the composite panels to the top of the floor formwork through the lifting equipment and lower them. Then, the composite panels continue to approach the floor formwork under the action of gravity. At this time, the composite panels push the power column downward, and the power column drives the extrusion plate to move downward. The extrusion plate squeezes the extrusion airbag, so that the gas in the extrusion airbag enters the expansion airbag through the vent pipe. After being compressed, the expansion airbag expands outward and fits tightly to the bottom edge of the composite panel, limiting the penetration of concrete into the gap between the composite panel and the floor formwork. This structural design can effectively limit the penetration of concrete into the gap between the composite panel and the formwork, thereby improving the quality of the project and reducing the burden of later cleaning work; 2. The limiting plate on the top of the connecting seat can move outward from the connecting seat under the action of the elastic driving member, thereby limiting the expansion airbag and reducing the possibility of the expansion airbag squeezing into the gap between the composite plate and the floor formwork when the composite plate squeezes the expansion airbag. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 This is a schematic diagram of the structure of the connecting socket in the embodiment of the present application; Figure 3 is a schematic diagram of an internal cross-section of an embodiment of the present application; Figure 4 yes Figure 3 A magnified schematic diagram of part A.

[0024] Figure numerals: 1. connecting seat; 11. connecting groove; 12. sliding groove; 121. limiting tooth; 13. power hole; 14. accommodating groove; 141. limiting groove; 15. support plate; 151. limiting block; 16. support spring; 17. extrusion groove; 18. inner groove; 19. outer groove; 2. inflation airbag; 3. extrusion airbag; 4. ventilation pipe; 5. power column; 6. extrusion plate; 7. limiting plate; 71. inner plate; 72. outer plate; 73. driving spring; 8. limiting column; 81. sliding tooth. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-4 This application is described in further detail.

[0026] The embodiment of the present application discloses a prefabricated composite panel surface joint connection component.

[0027] The inventors of the present application discovered that during the production of prefabricated composite slabs, there will inevitably be some uneven areas on the bottom end surface. At this time, concrete can easily penetrate into the gap between the composite slab surface and the formwork, thereby affecting the quality of the project and increasing the burden of subsequent cleaning work. For this reason, the present application mainly adopts a prefabricated composite slab surface joint connection component to achieve the effect of reducing the amount of concrete leakage. The present application is further described in detail below.

[0028] See also Figure 1 and Figure 2 The composite board surface joint connection component includes a connection seat 1, which is connected end to end and forms a "U"-shaped structure. The connection seat 1 is fixed to the floor formwork, and the top end surface of the connection seat 1 is in the same horizontal plane as the top end surface of the composite board.

[0029] See also Figure 2 and Figure 3 A connecting groove 11 is formed on the top of the connecting seat 1, and the connecting groove 11 is in a "U"-shaped structure. The composite board surface joint connection component also includes an inflatable airbag 2, an extrusion airbag 3, an extrusion plate 6 and a power column 5. The inflatable airbag 2 is installed and placed in the connecting groove 11, and the bottom outer wall of the inflatable airbag 2 is fixedly connected to the bottom groove wall of the connecting groove 11. Air is stored in the inflatable airbag 2, and the vertical side walls on the opposite sides of the inflatable airbag 2 adopt a folded structure. The inflatable airbag 2 adopts a plastic film structure. In other embodiments, the inflatable airbag 2 can also be a rubber film or a silicone film structure.

[0030] An extrusion groove 17 is formed in the connection seat 1. There are multiple extrusion grooves 17 and they are arranged at intervals along the circumferential direction. The extrusion airbag 3 is installed in the extrusion groove 17. The bottom outer wall of the extrusion airbag 3 is fixedly connected to the bottom groove wall of the extrusion groove 17. Air is stored in the extrusion airbag 3. The connection seat 1 is provided with a vent pipe 4. The two ends of the vent pipe 4 are respectively connected and fixed to the extrusion airbag 3 and the expansion airbag 2. When in use, the extrusion airbag 3 and the expansion airbag 2 are connected through the vent pipe 4.

[0031] The connecting seat 1 is formed with a power hole 13 extending in the vertical direction. The power hole 13 is connected to the extrusion groove 17, and the side opening of the power hole 13 away from the extrusion groove 17 is located at the top of the connecting seat 1. The power column 5 slides up and down in the power hole 13, and the top of the power column 5 protrudes out of the power hole 13.

[0032] The extrusion plate 6 slides up and down in the extrusion groove 17, the top of the extrusion plate 6 is fixedly connected to the bottom of the power column 5, and the bottom of the extrusion plate 6 abuts against the top outer wall of the extrusion airbag 3. When the composite plate is lapped on the top end face of the floor formwork, the composite plate pushes the power column 5 to slide down into the extrusion groove 17. At this time, the extrusion plate 6 squeezes the extrusion airbag 3, and the air in the extrusion airbag 3 is passed into the expansion airbag 2 through the vent pipe 4, so that the expansion airbag 2 expands toward the outside of the connecting groove 11. At this time, the top outer wall of the expansion airbag 2 abuts against the bottom of the composite plate, and the outer wall of the expansion airbag 2 can be deformed, so that the outer wall of the expansion airbag 2 can adapt to the condition of the bottom end face of the composite plate, which is conducive to keeping the outer wall of the expansion airbag 2 in contact with the bottom end face of the composite plate, realizing the sealing of the gap between the bottom end face of the composite plate and the top end face of the floor formwork, and reducing the amount of concrete leaking from the gap.

[0033] A limiting groove is formed on the top of the connection seat 1, and the limiting groove includes an inner groove 18 and an outer groove 19, and the inner groove 18 and the outer groove 19 are respectively in a "mouth" shaped structure. The connection groove 11 is located between the inner groove 18 and the outer groove 19, and the connection groove 11 surrounds the inner groove 18, and the spacing between the inner groove 18 and the connection groove 11 is 2 mm, and the spacing between the outer groove 19 and the connection groove 11 is 2 mm.

[0034] The connection seat 1 is provided with a limiting plate 7, which includes an inner plate 71 and an outer plate 72. The inner plate 71 and the outer plate 72 are respectively in a "mouth"-shaped structure. The inner plate 71 slides up and down in the inner groove 18, and the outer plate 72 slides up and down in the outer groove 19. The connection seat 1 is provided with an elastic driving member, which is a driving spring 73. There are multiple driving springs 73 and they are respectively installed in the inner groove 18 and the outer groove 19. When the driving spring 73 is elastically released, the inner plate 71 is pushed to protrude into the inner groove 18, and the outer plate 72 is pushed to protrude out of the outer groove 19. When the composite board is overlaid on the top of the floor formwork, the bottom of the composite board abuts against the top of the inner board 71 and the outer board 72, and the composite board pushes the inner board 71 to slide into the inner groove 18, and pushes the outer board 72 to slide into the outer groove 19. At this time, when the expansion bag 2 expands, it is restricted by the inner board 71 and the outer board 72, reducing the possibility of the expansion bag 2 squeezing into the gap between the composite board and the floor formwork, which is conducive to enabling the composite board to abut against the top of the floor formwork.

[0035] At the same time, in order to make the expansion airbag 2 abut and adapt to the bottom end surface of the composite plate and there is a distance between the bottom of the composite plate and the floor formwork, the composite plate can continue to slide downward to abut the floor formwork, a receiving groove 14 is formed in the connecting seat 1, and the receiving groove 14 is located directly below the ventilation pipe 4, and the ventilation pipe 4 passes through the notch of the receiving groove 14.

[0036] The vent pipe 4 is a hose structure, and the tube wall of the vent pipe 4 can be elastically deformed. The connecting seat 1 is provided with a support plate 15, and the support plate 15 slides up and down in the receiving groove 14. The support plate 15 is fixedly connected to the vertical side walls on the opposite sides, and the limiting grooves 141 are formed on the vertical groove walls on the opposite sides of the receiving groove 14, and the limiting grooves 141 extend in the vertical direction. The limiting block 151 slides up and down in the limiting groove 141, and when the top end face of the limiting block 151 abuts against the top groove wall of the limiting groove 141, the support plate 15 blocks the notch of the receiving groove 14, and at the same time, the top end face of the support plate 15 abuts against the bottom tube wall of the vent pipe 4.

[0037] The connecting seat 1 is provided with an elastic support member, which is a support spring 16, and the support spring 16 is installed in the receiving groove 14. The top end of the support spring 16 abuts against the bottom of the support plate 15, and the bottom end of the support spring 16 abuts against the groove wall on the side away from the groove of the receiving groove 14. When the support spring 16 is elastically released, it pushes the support plate 15 to slide toward the vent pipe 4 until the top end surface of the limit block 151 abuts against the top groove wall of the limit groove 141, which is conducive to compressing the airbag 3 to transmit airflow to the inflated airbag 2, offsetting the pressure on the vent pipe 4, and maintaining the state of the vent pipe 4.

[0038] When the expansion airbag 2 abuts against and fits the bottom end surface of the composite plate, the composite plate continues to be pressed downward in the direction of the floor formwork, so that the extrusion plate 6 continues to squeeze the extrusion airbag 3, and the expansion airbag 2 is pressed back into the connecting groove 11 by the composite plate. At this time, the pressure on the wall of the ventilation pipe 4 continues to rise, and the wall of the ventilation pipe 4 is squeezed by the air and expands into the receiving groove 14, the support plate 15 is pushed into the receiving groove 14, and the support spring 16 enters a compressed state.

[0039] A slide groove 12 extending in the vertical direction is formed at the top of the connection seat 1, and a limiting column 8 is provided on the connection seat 1. The limiting column 8 is slidably connected in the slide groove 12 up and down, and the top of the limiting column 8 is fixedly connected to the bottom of the composite plate. The connection seat 1 is provided with a limiting member, and when the limiting column 8 slides into the connection seat 1, the limiting member limits the limiting column 8 from sliding out of the connection seat 1.

[0040] The limiting member is a limiting tooth 121, which is fixedly connected to a vertical groove wall on one side of the slide groove 12. There are multiple limiting teeth 121, and the limiting teeth 121 are evenly spaced up and down. The limiting teeth 121 are a right-angled triangular tooth structure, and the limiting teeth 121 are made of a material with elastic deformation ability, such as plastic or stainless steel.

[0041] A sliding tooth 81 is fixedly connected to the vertical side wall of the limiting column 8 facing the limiting tooth 121. The sliding tooth 81 meshes with the limiting tooth 121. The sliding tooth 81 is a right-angled triangular tooth structure. The limiting tooth 121 is made of a material with elastic deformation ability, such as plastic or stainless steel. When the limiting column 8 slides into the connecting seat 1, the sliding tooth 81 slides on the limiting tooth 121 in one direction; when the limiting column 8 slides out of the connecting seat 1, the limiting tooth 121 supports the sliding tooth 81 in one direction, and limits the limiting column 8 from sliding out of the slide groove 12, so that the composite board remains in a state of overlapping the top end surface of the floor formwork.

[0042] The implementation principle of a prefabricated composite panel surface joint connection component in the embodiment of the present application is: When assembling the composite board, first transport the composite board to the construction site, then lift the composite board to the top of the floor formwork through the lifting equipment, align the limiting column 8 with the slide slot 12 and then slowly lower it. Then the composite board continues to approach the floor formwork under the action of gravity. At this time, the composite board pushes the power column 5 downward, and the power column 5 drives the extrusion plate 6 to move downward. The extrusion plate 6 squeezes the extrusion airbag 3, so that the gas in the extrusion airbag 3 enters the expansion airbag 2 through the vent pipe 4. After being compressed, the expansion airbag 2 expands outward and fits tightly to the bottom edge of the composite board, limiting the penetration of concrete into the gap between the composite board and the floor formwork. Through this structural design, the penetration of concrete into the gap between the composite board and the formwork can be effectively limited, thereby improving the quality of the project and reducing the burden of later cleaning work.

[0043] At the same time, when the composite board is overlaid on the floor formwork, the composite board pushes the inner plate 71 and the outer plate 72 to slide down into the connecting seat 1, which is conducive to the inner plate 71 and the outer plate 72 to keep the inflatable airbag 2 in a restricted state; and when the composite board is overlaid on the floor formwork, the composite board drives the limiting column 8 to slide down into the sliding groove 12, and at this time, the sliding tooth 81 slides unidirectionally on the limiting tooth 121. Finally, when the composite board abuts against the floor formwork, the limiting tooth 121 unidirectionally supports the sliding tooth 81, which is conducive to keeping the composite board abutting against the floor formwork.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An assembled composite panel joint connection component, characterized in that: It comprises a connecting seat (1) arranged on the floor formwork, the connecting seat (1) being connected end to end, and a connecting groove (11) being formed on the top of the connecting seat (1); An expansion airbag (2) is arranged in the connecting groove (11); An extrusion airbag (3) is arranged in the connection seat (1), and the connection seat (1) is provided with a ventilating pipe (4) connecting the extrusion airbag (3) and the expansion airbag (2); A power column (5) slides up and down on the connecting seat (1), and the top of the power column (5) protrudes out of the connecting seat (1); An extrusion plate (6) is arranged at the bottom of the power column (5) and slides up and down on the connecting seat (1), and the bottom of the extrusion plate (6) abuts against the top of the extrusion airbag (3); When the power column (5) slides downward into the connection seat (1), the extrusion plate (6) squeezes the extrusion airbag (3), and at this time the expansion airbag (2) expands toward the outside of the connection groove (11).

2. The assembled composite panel joint connection member according to claim 1, characterized in that: A limiting plate (7) is provided on the top of the connecting seat (1) for sliding up and down, the limiting plate (7) comprising an inner plate (71) and an outer plate (72), and the connecting groove (11) is located between the inner plate (71) and the outer plate (72); The connecting seat (1) is provided with an elastic driving member, and the elastic driving member drives the inner plate (71) and the outer plate (72) to slide toward the outside of the connecting seat (1); The connection seat (1) is provided with a limiting column (8) which slides up and down, and the top of the limiting column (8) is connected to the composite plate; The connection seat (1) is provided with a limiting member, and when the limiting column (8) slides into the connection seat (1), the limiting member limits the limiting column (8) from sliding out of the connection seat (1).

3. The assembled composite panel joint connection member according to claim 2, characterized in that: The elastic driving member is a driving spring (73), and the driving spring (73) is arranged in the connecting seat (1). The driving spring (73) drives the inner plate (71) and the outer plate (72) to slide toward the outside of the connecting seat (1).

4. The assembled composite panel joint connection member according to claim 3, characterized in that: The limiting member is a limiting tooth (121), and the connecting seat (1) is formed with a sliding groove (12) for the limiting column (8) to slide up and down; The limiting teeth (121) are arranged on a vertical groove wall on one side of the sliding groove (12), and there are a plurality of limiting teeth (121) which are evenly spaced up and down; The side wall of the limiting column (8) is provided with a sliding tooth (81), and the sliding tooth (81) is meshed with the limiting tooth (121); When the limiting column (8) slides into the connecting seat (1), the sliding tooth (81) slides on the limiting tooth (121); When the limiting column (8) slides outward from the connecting seat (1), the limiting tooth (121) unidirectionally supports the sliding tooth (81).

5. The assembled composite panel joint connection member according to claim 1, characterized in that: The ventilation pipe (4) is a hose structure, a receiving groove (14) is formed in the connection seat (1), and the ventilation pipe (4) passes through the notch of the receiving groove (14); When the outer wall of the expansion airbag (2) abuts against the laminated plate and the power column (5) slides into the connecting seat (1), the ventilation pipe (4) expands into the containing groove (14).

6. The assembled composite panel joint connection member according to claim 5, characterized in that: The connection seat (1) is provided with a support plate (15) which slides up and down in the receiving groove (14), and the connection seat (1) is provided with an elastic support member which drives the support plate (15) to slide towards the notch of the receiving groove (14).

7. The assembled composite panel joint connection member according to claim 6, characterized in that: The elastic support member is a support spring (16), and the support spring (16) is installed in the accommodating groove (14). One end of the support spring (16) abuts against the bottom of the support plate (15), and the bottom of the support spring (16) abuts against the bottom groove wall of the accommodating groove (14).

8. The assembled composite board surface joint connection component according to claim 7, characterized in that: A limit block (151) is disposed on the side wall of the support plate (15), and a limit groove (141) is formed on the groove wall of the accommodating groove (14) for the limit block (151) to slide up and down; When the limiting block (151) abuts against the bottom groove wall of the limiting groove (141), the top of the support plate (15) abuts against the bottom outer wall of the ventilation pipe (4).

Images