CN220891305U

CN220891305U - Building water supply and drainage structure

Info

Publication number: CN220891305U
Application number: CN202322414373.0U
Authority: CN
Inventors: 唐贤固; 毛群刚; 高建华
Original assignee: Guangdong Rongtong Construction Co ltd
Current assignee: Guangdong Rongtong Construction Co ltd
Priority date: 2023-09-05
Filing date: 2023-09-05
Publication date: 2024-05-03
Anticipated expiration: 2033-09-05

Abstract

The application relates to the field of water supply and drainage, in particular to a building water supply and drainage structure, which comprises a support component and a plurality of fixing components, wherein the support component comprises a first support rod and two second support rods, the other ends of the second support rods are connected to a ceiling, the fixing components comprise a first adjusting rod, a first fixing ring and a second fixing ring, one end of the first adjusting rod is connected to the first support rod, the other ends of the first adjusting rod are connected to the first fixing ring, the first fixing ring and the second fixing ring are of a semi-arc structure, clamping blocks are arranged at the outer side edges of openings of the first fixing ring, and buckles clamped on the clamping blocks are arranged at the outer side edges of openings of the second fixing ring. According to the application, the supporting component and the fixing component are provided with supporting force through the ceiling, the first fixing ring and the second fixing ring provide fixed support for the water pipe, meanwhile, the semi-arc structure is convenient for being tightly attached to the outer wall of the water pipe, the water pipe is supported and limited, and the situation that the water pipe rolls on the surface of the first supporting rod in the maintenance process is reduced.

Description

Building water supply and drainage structure

Technical Field

The application relates to the field of water supply and drainage, in particular to a building water supply and drainage structure.

Background

With the development of technology and the increasing of the living standard of people in China, the safety requirements on buildings are more stringent, wherein anti-seismic measures are required for the installation of water supply and drainage pipelines in factories, parking lots and other places, the water supply and drainage pipelines are usually arranged below ceilings by using brackets, and if the traditional gravity brackets are used, the effect of resisting and relieving vertical earthquake can be achieved to a certain extent, but only the effect of resisting longitudinal waves is achieved, and the anti-seismic effect is poor. The anti-seismic support has a unique diagonal bracing structure, and can effectively resist and relieve horizontal seismic force and simultaneously resist seismic forces in other directions, so that the anti-seismic performance of facilities is greatly improved.

However, the pipe installation using the anti-seismic bracket at present usually uses a semi-arc pipe clamp 200 to clamp the outer wall of the cylindrical water pipe (as shown in fig. 1), specifically, the pipe clamp is covered on the upper surface of the water pipe from the upper direction to the lower direction of the water pipe, so that the water pipe is fixed, if the water pipe is damaged, the pipe clamp needs to be taken apart, but after the pipe clamp is taken apart, the cylindrical water pipe is easy to move on a planar supporting plate, and the maintenance process is very inconvenient.

Disclosure of Invention

In order to solve the problem that a water pipe is easy to move after a pipe clamp is disassembled in the maintenance process of an anti-seismic bracket, the application provides a building water supply and drainage structure.

The application provides a building water supply and drainage structure, which adopts the following technical scheme:

The utility model provides a building water supply and drainage structure, includes supporting component and a plurality of fixed subassembly, the supporting component include first bracing piece and for the second bracing piece that first bracing piece both sides set up, the other end of second bracing piece is connected in the ceiling, fixed subassembly includes first regulation pole, first solid fixed ring and second solid fixed ring, first regulation pole one end connect in first bracing piece, just the first regulation pole other end connect in first solid fixed ring, first solid fixed ring and second solid fixed ring are half arc structure, the uncovered department of second solid fixed ring for the uncovered department of first solid fixed ring sets up, the uncovered department outside edge of first solid fixed ring is provided with the fixture block, the uncovered department outside edge of second solid fixed ring be provided with the block in the buckle of fixture block.

By adopting the technical scheme, the ceiling provides supporting force for the second supporting rod, so that supporting force is provided for the first supporting rod, and further supporting force is provided for the first adjusting rod, the first fixing ring and the second fixing ring which are arranged on the first supporting rod, and then the first fixing ring and the second fixing ring provide supporting force for the water pipe; and through the fixed of fixture block and buckle, with the stable fixed of water pipe, and the simple dismantlement of being convenient for to overhaul.

Optionally, the support assembly further includes a third support bar parallel to the first support bar, and one end of the third support bar is connected with one of the second support bars, the other end of the third support bar is connected with the other of the second support bar, the fixing assembly further includes a second adjustment bar, one end of the second adjustment bar is connected with the third support bar, and the other end of the second adjustment bar is connected with the second fixing ring.

Through adopting above-mentioned technical scheme, the second bracing piece provides the holding power to the third bracing piece simultaneously to the third bracing piece provides the holding power to the second regulation pole, and then provides the support to the fixed ring of second, makes first fixed ring and the fixed ring of second fix the water pipe jointly, has improved the fixed subassembly and has carried stability and limiting displacement to the water pipe, makes the water pipe be difficult for rolling on first bracing piece surface.

Optionally, the building water supply and drainage structure further comprises an earthquake-resistant assembly, wherein the earthquake-resistant assembly comprises two first earthquake-resistant parts symmetrically arranged on two sides of the first supporting rod, the first earthquake-resistant parts comprise first earthquake-resistant connecting seats, one ends of the first earthquake-resistant connecting seats are connected with the first supporting rod, the other ends of the first earthquake-resistant connecting seats are connected with first connecting rods, the other ends of the first connecting rods are connected with second earthquake-resistant connecting seats, and the other ends of the second earthquake-resistant connecting seats are connected with ceilings; the first connecting rod is arranged on the plane where the first supporting rod is located and is obliquely arranged.

Through adopting above-mentioned technical scheme, first antidetonation subassembly is the slope and connects in the ceiling, provides the lateral support, when receiving external force, first antidetonation subassembly can provide the component, if all have the effect of keeping out to longitudinal wave and transverse wave in the earthquake process, reduce the damage that external force led to the fact the building ceiling through single stress point, promoted shock resistance and to the protection effect of building.

Optionally, the anti-seismic component further includes two second anti-seismic members symmetrically disposed on two sides of the first support rod, where the second anti-seismic members include a third anti-seismic connecting seat, one end of the third anti-seismic connecting seat is connected to the first support rod, the other end of the third anti-seismic connecting seat is connected to the second connecting rod, the other end of the second connecting rod is connected to a fourth anti-seismic connecting seat, and the other end of the fourth anti-seismic connecting seat is connected to a ceiling; the second connecting rod is perpendicular to the central axis of the first supporting rod and is obliquely arranged, and an included angle is formed between the second connecting rod and the first connecting rod.

Through adopting above-mentioned technical scheme, second antidetonation subassembly also slope connects in the ceiling, provides the lateral support, provides the component equally, and when the drainage structure received the external force effect, external force was dispersed through second bracing piece, first antidetonation subassembly and second antidetonation subassembly, if the earthquake in-process, first antidetonation subassembly and second antidetonation subassembly provided different component direction, all had the effect of keeping out to longitudinal wave and transverse wave, reduced the damage that external force led to the fact the building ceiling through single atress point, promoted shock resistance and to the protection effect of building.

Optionally, the second bracing piece includes first interior pole and cover locate first sleeve pipe of first interior pole outer wall, first interior pole sets up to the threaded rod, first bracing piece seted up with first threaded hole of first interior pole threaded connection.

Through adopting above-mentioned technical scheme, the threaded connection of second interior pole and first bracing piece can adjust the second bracing piece in the spiro union degree of depth of first bracing piece according to the required height of water pipe, and then adjusts the position that first bracing piece is located second bracing piece length direction, realizes the regulation to the water pipe height, and then realizes the altitude mixture control of whole water supply and drainage structure. Preferably, when the height of the first supporting rod is adjusted, the inclination angles of the first anti-seismic component and the second anti-seismic component can be adjusted to be connected with the ceiling, so that the overall height of the water supply and drainage structure is adjusted.

Optionally, the third bracing piece includes second interior pole and cover are located the second sleeve pipe of second interior pole outer wall, the second interior pole the first regulation pole with the second regulation pole all sets up to the threaded rod, first bracing piece seted up with first regulation pole threaded connection's second screw hole, second sleeve pipe set up with second regulation pole threaded connection's third screw hole, second bracing piece first sleeve pipe set up with second interior pole threaded connection's fourth screw hole.

Through adopting above-mentioned technical scheme, adjust the spiro union degree of depth of first regulation pole in first bracing piece, but the height of adjusting the water pipe, adjust the spiro union degree of depth of second regulation pole in the second internal rod simultaneously, but the height of the fixed ring of adjustable second for the spacing space of cladding centre gripping water pipe is adjusted to first fixed ring and the mutually supporting of the fixed ring of second, has improved the structural suitability of fixed water pipe position. On the other hand, when changing the water pipe of different diameters, also can dismantle first regulation pole from first bracing piece, dismantle the second regulation pole from the second sleeve pipe, change the first solid fixed ring and the second solid fixed ring of different size structures to the adaptation protects and spacing to the water pipe of different diameters.

Optionally, the building water supply and drainage structure still includes a plurality of stiffening component, the stiffening component includes adjusting screw, butt piece, butt in the outer wall of first interior pole, adjusting screw pass first sleeve pipe and connect in butt piece.

Through adopting above-mentioned technical scheme, the position of stiffening component accessible adjusting screw regulation butt piece promotes the stability and the intensity of second bracing piece, promotes the stability of whole water supply and drainage structure.

Optionally, the fixing assembly further includes a buffer ring, and the first fixing ring and the second fixing ring are both provided with grooves for accommodating the buffer ring.

Through adopting above-mentioned technical scheme, the buffer ring can be used to play the cushioning effect to the water pipe, strengthens the protection effect to the water pipe.

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

1. The supporting force is provided for the second supporting rod through the ceiling, so that the supporting force is provided for the first supporting rod and the third supporting rod, the supporting force is provided for the first adjusting rod, the second adjusting rod, the first fixing ring and the second fixing ring, and then the first fixing ring and the second fixing ring are matched together to fix the water pipe, so that the bearing stability of the structure on the water pipe is improved; meanwhile, the semi-arc structure is convenient for tightly fitting the outer wall of the water pipe, plays a role in protecting and limiting the water pipe, and reduces the rolling condition of the water pipe on the surface of the first supporting rod; through the fixture block and the fixing of buckle, the simple dismantlement of being convenient for to overhaul the water pipe.

2. The first earthquake-resistant component and the second earthquake-resistant component provide lateral support in two directions, when external forces such as earthquakes are received, the received stresses can be subjected to component force through the second support rod, the first earthquake-resistant component and the second earthquake-resistant component, so that the damage to the building ceiling caused by external forces through a single stress point is reduced, and the earthquake resistance and the protection effect on the building are improved; 3. the height of the first support rod can be moderately adjusted by the first inner rod of the threaded rod structure, the height of the first fixing ring is adjusted by the first adjusting rod of the threaded rod structure, the height of the water pipe is further finely adjusted, the embedded depth of the second adjusting rod in the second sleeve is adjusted, the limiting space formed by surrounding the first fixing ring and the second fixing ring can be adjusted according to the outer diameter of the water pipe, the whole water supply and drainage structure can be suitable for protecting and limiting and fixing water pipes with different diameters, and the applicability of the structure is improved.

Drawings

Fig. 1 is a schematic longitudinal section of a prior art water supply and drainage structure using a semi-arc pipe clamp 200 to clamp the outer wall of a cylindrical water pipe.

Fig. 2 is a schematic structural view of the water supply and drainage structure of the building according to the present application.

Figure 3 is an exploded view of the second support pole and the stiffening assembly of the present application.

Fig. 4 is an exploded view of the second support bar, the third support bar and the fixing assembly according to the present application.

Fig. 5 is an enlarged view of a portion a in fig. 2.

Reference numerals illustrate: 11. a first support bar; 111. a first threaded hole; 112. a second threaded hole; 12. a second support bar; 121. a first inner rod; 122. a first sleeve; 1221. a fourth threaded hole; 13. a third support bar; 131. a second inner rod; 132. a second sleeve; 1321. a third threaded hole; 21. a first adjusting lever; 22. a first fixing ring; 221. a clamping block; 222. a groove; 23. a second fixing ring; 231. a buckle; 24. a second adjusting lever; 25. a buffer ring; 311. a first anti-seismic connection base; 312. a first connecting rod; 313. the second anti-seismic connecting seat; 321. a third anti-seismic connecting seat; 322. a second connecting rod; 323. a fourth anti-vibration connecting seat; 4. a stiffening component; 41. an adjusting screw; 42. and an abutting piece.

Detailed Description

The application is described in further detail below with reference to fig. 2-5.

The embodiment of the application discloses a building water supply and drainage structure.

Referring to fig. 2 and 3, this building water supply and drainage structure includes supporting component, antidetonation subassembly, a plurality of fixed subassembly and a plurality of stiffening component 4, supporting component includes first bracing piece 11, second bracing piece 12 and third bracing piece 13, the quantity of second bracing piece 12 is two, and two second bracing pieces 12 are about the bilateral symmetry setting of first bracing piece 11, the one end and the first bracing piece 11 of second bracing piece 12 are connected, the other end of second bracing piece 12 is connected in the ceiling, third bracing piece 13 one end is connected with a second bracing piece 12, the other end and another second bracing piece 12 of third bracing piece 13 are connected, and third bracing piece 13 is on a parallel with first bracing piece 11 setting, further, second bracing piece 12 includes first sleeve pipe 122 and first interior pole 121, first sleeve pipe 122 cover is located first interior pole 121 outer wall, third bracing piece 13 includes second sleeve pipe 132 and second interior pole 131, second sleeve pipe 132 cover is located second interior pole 131 outer wall, first interior pole 121 and second interior pole 131 all are provided with the threaded rod, first bracing piece 11 has seted up first screw hole 111 and second screw hole 112, first sleeve pipe 122 has seted up first screw hole 1 and fourth screw hole 122, first screw hole 1 is seted up with fourth screw hole 122, first sleeve pipe 122 is connected with fourth screw hole 1.

The anti-seismic assembly comprises a first anti-seismic member and a second anti-seismic member, wherein the first anti-seismic member comprises a first anti-seismic connecting seat 311, a first connecting rod 312 and a second anti-seismic connecting seat 313 which are sequentially connected, one end of the first anti-seismic connecting seat 311 is connected with a first supporting rod 11, the other end of the first anti-seismic connecting seat 311 is connected with one end of the first connecting rod 312, the other end of the first connecting rod 312 is connected with one end of the second anti-seismic connecting seat 313, the other end of the second anti-seismic connecting seat 313 is connected with a ceiling, the first connecting rod 312 is arranged on a plane where the first supporting rod 11 is located and is obliquely arranged, the whole first anti-seismic member is obliquely connected with the ceiling, the first anti-seismic connecting seat 311 and the second anti-seismic connecting seat 313 are located on different vertical planes, and in particular, the projection position of the first anti-seismic connecting seat 311 on the horizontal plane is not coincident with the projection position of the second anti-seismic assembly on the horizontal plane. The second antidetonation spare is including the third antidetonation connecting seat 321, second antidetonation pole and the fourth antidetonation connecting seat 323 that connect gradually, third antidetonation connecting seat 321 one end is connected in first bracing piece 11, the third antidetonation connecting seat 321 other end is connected in the one end of second antidetonation pole, the other end of second antidetonation pole is connected in the one end of fourth antidetonation connecting seat 323, the other end of fourth antidetonation connecting seat 323 is connected in the ceiling, second connecting rod 322 perpendicular to first bracing piece 11's axis setting, and the slope sets up for whole second antidetonation spare is connected in the ceiling with the slope, third antidetonation connecting seat 321 is located different perpendicular with fourth antidetonation connecting seat 323, specifically, the projection position of third antidetonation connecting seat 321 on the horizontal plane does not coincide with the projection position of fourth antidetonation subassembly on the horizontal plane, and have the contained angle between second connecting rod 322 and the first connecting rod 312.

Referring to fig. 4 and 5, the fixing assembly includes a first adjusting rod 21, a second adjusting rod 24, a first fixing ring 22, a second fixing ring 23, a clamping block 221, a buckle 231 and a buffer ring 25, where the first adjusting rod 21 and the second adjusting rod 24 are all threaded rods, the first adjusting rod 21 is connected to the first supporting rod 11 through a second threaded hole 112, the other end of the first adjusting rod 21 is connected to the first fixing ring 22, the second adjusting rod 24 is connected to the third supporting rod 13 through a third threaded hole 1321, the other end of the second adjusting rod 24 is connected to the second fixing ring 23, the first fixing ring 22 and the second fixing ring 23 are all semi-arc-shaped, the opening of the first fixing ring 22 and the opening of the second fixing ring 23 are opposite, the inner wall of the first fixing ring 22 and the inner wall of the second fixing ring 23 are both provided with grooves 222 accommodating the buffer ring 25, the grooves 222 are preferably arc-shaped grooves 222, the clamping block 221 are arranged at the outer edge of the opening of the first fixing ring 22, the buckle 231 is arranged at the outer edge of the opening of the second fixing ring 23, and the buckle 231 is clamped with the clamping block 221.

The stiffening component 4 comprises an adjusting screw 41 and a supporting piece 42, wherein the adjusting screw 41 penetrates through the first sleeve 122 and is connected to the supporting piece 42, and the supporting piece 42 is abutted against the outer wall of the first inner rod 121.

The implementation principle of the building water supply and drainage structure provided by the embodiment of the application is as follows: firstly, installing two first inner rods 121 on a ceiling, sleeving a first sleeve 122 outside the first inner rods 121, penetrating the bottom of one first inner rod 121 through a first threaded hole 111 at one end of a first supporting rod 11 to realize threaded connection with the first supporting rod 11, penetrating the bottom of the other first inner rod 121 through a first threaded hole 111 at the other end of the first supporting rod 11 to be in threaded connection with the other end of the first supporting rod 11, installing and fixing a plurality of adjusting screws 41 through the first sleeve 122, screwing the adjusting screws 41 to an abutting block to abut against the first inner rod 121 for fixing, and completing the installation of the first supporting rod 11 and the second supporting rod 12; then, one end of the second inner rod 131, which is sleeved with the second sleeve 132, passes through the fourth threaded hole 1221 of one first sleeve 122 and is in threaded connection with the first sleeve 122, and the other end of the second inner rod 131 passes through the fourth threaded hole 1221 of the other first sleeve 122 and is in threaded connection with the first sleeve 122, so that the installation of the third support rod 13 and the two second support rods 12 is completed;

Then install the one end of first antidetonation connecting seat 311 in first bracing piece 11, adjust the angle of first antidetonation connecting seat 311, the one end of head rod 312 is installed to the other end at first antidetonation connecting seat 311, make head rod 312 set up in the horizontal plane that first bracing piece 11 is located, and set up in the longitudinal direction in the slope, install second antidetonation connecting seat 313 at the other end of head rod 312, and adjust the angle of second antidetonation connecting seat 313 to the top of second antidetonation connecting seat 313 is parallel with the ceiling, install second antidetonation connecting seat 313 in the ceiling again, accomplish the installation of first antidetonation piece. Simultaneously, install third antidetonation connecting seat 321 in first bracing piece 11, adjust the angle of third antidetonation connecting seat 321, install second connecting rod 322 at the other end of third antidetonation connecting seat 321 for second connecting rod 322 perpendicular to first bracing piece 11's axis sets up, and the setting of slope in longitudinal direction, install fourth antidetonation connecting seat 323 at the other end of second connecting rod 322, and adjust the angle of fourth antidetonation connecting seat 323 to the top of fourth antidetonation connecting seat 323 be parallel with the ceiling, install fourth antidetonation connecting seat 323 in the ceiling again, accomplish the installation of second antidetonation spare.

Then, one end of the plurality of first adjusting rods 21 is threaded through the second threaded holes 112 and is in threaded connection with the first supporting rods 11, correspondingly, the first fixing ring 22 is installed at the other end of the first adjusting rods 21, the threaded connection height of the first adjusting rods 21 in the first supporting rods 11 is adjusted, then, one end of the plurality of second adjusting rods 24 is threaded through the third threaded holes 1321 and is in threaded connection with the third supporting rods 13, correspondingly, the second fixing ring 23 is installed at the other end of the second adjusting rods 24, the threaded connection depth of the second adjusting rods 24 in the third supporting rods 13 is adjusted, the buffer ring 25 is installed in the grooves 222 of the first fixing ring 22 and the second fixing ring 23, then, a water pipe with a proper size is installed between the first fixing ring 22 and the second fixing ring 23, the first fixing ring 22 and the second fixing ring 23 are abutted, the clamping buckles 231 are clamped on the clamping blocks 221, and the clamping and fixing of the first fixing ring 22 and the second fixing ring 23 on the water pipe is achieved.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims

1. A building water supply and drainage structure which is characterized in that: the support assembly comprises a first support rod (11) and second support rods (12) which are arranged on two sides of the first support rod (11) relative to each other, the other ends of the second support rods (12) are connected to a ceiling, the fixing assembly comprises a first adjusting rod (21), a first fixing ring (22) and a second fixing ring (23), one end of the first adjusting rod (21) is connected to the first support rod (11), the other ends of the first adjusting rod (21) are connected to the first fixing ring (22), the first fixing ring (22) and the second fixing ring (23) are of a semi-arc structure, the opening of the second fixing ring (23) is opposite to the opening of the first fixing ring (22), clamping blocks (221) are arranged on the outer edges of the openings of the first fixing ring (22), and buckles (231) which are clamped on the clamping blocks (221) are arranged on the outer edges of the openings of the second fixing ring (23).

The support assembly further comprises a third support rod (13) which is parallel to the first support rod (11), one end of the third support rod (13) is connected with one second support rod (12), the other end of the third support rod (13) is connected with the other second support rod (12), the fixing assembly further comprises a second adjustment rod (24), one end of the second adjustment rod (24) is connected with the third support rod (13), and the other end of the second adjustment rod (24) is connected with the second fixing ring (23);

The second support rod (12) comprises a first inner rod (121) and a first sleeve (122) sleeved on the outer wall of the first inner rod (121), the first inner rod (121) is set to be a threaded rod, and the first support rod (11) is provided with a first threaded hole (111) in threaded connection with the first inner rod (121);

The third bracing piece (13) include second interior pole (131) and cover locate second sleeve pipe (132) of second interior pole (131) outer wall, second interior pole (131) first regulation pole (21) with second regulation pole (24) all set up to the threaded rod, first bracing piece (11) set up with second screw hole (112) of first regulation pole (21) threaded connection, second sleeve pipe (132) set up with third screw hole (1321) of second regulation pole (24) threaded connection, first sleeve pipe (122) of second bracing piece (12) set up with fourth screw hole (1221) of second interior pole (131) threaded connection.

2. A building water supply and drainage structure according to claim 1, wherein: the building water supply and drainage structure further comprises an earthquake resistant component, wherein the earthquake resistant component comprises two first earthquake resistant parts which are symmetrically arranged on two sides of the first supporting rod (11), each first earthquake resistant part comprises a first earthquake resistant connecting seat (311), one end of each first earthquake resistant connecting seat (311) is connected with the first supporting rod (11), the other end of each first earthquake resistant connecting seat (311) is connected with a first connecting rod (312), the other end of each first connecting rod (312) is connected with a second earthquake resistant connecting seat (313), and the other end of each second earthquake resistant connecting seat (313) is connected with a ceiling; the first connecting rod (312) is arranged on the plane where the first supporting rod (11) is located and is obliquely arranged.

3. A building water supply and drainage structure according to claim 2, wherein: the anti-seismic assembly further comprises two second anti-seismic pieces symmetrically arranged on two sides of the first supporting rod (11), each second anti-seismic piece comprises a third anti-seismic connecting seat (321), one end of each third anti-seismic connecting seat (321) is connected to the first supporting rod (11), the other end of each third anti-seismic connecting seat (321) is connected with a second connecting rod (322), the other end of each second connecting rod (322) is connected with a fourth anti-seismic connecting seat (323), and the other end of each fourth anti-seismic connecting seat (323) is connected to a ceiling; the second connecting rod (322) is perpendicular to the central axis of the first supporting rod (11) and is obliquely arranged, and an included angle is formed between the second connecting rod (322) and the first connecting rod (312).

4. A building water supply and drainage structure according to claim 1, wherein: the building water supply and drainage structure further comprises a plurality of stiffening components (4), wherein the stiffening components (4) comprise adjusting screws (41) and abutting pieces (42), the abutting pieces (42) are abutted to the outer wall of the first inner rod (121), and the adjusting screws (41) penetrate through the first sleeve (122) and are connected to the abutting pieces (42).

5. A building water supply and drainage structure according to claim 1, wherein: the fixing assembly further comprises a buffer ring (25), and the first fixing ring (22) and the second fixing ring (23) are respectively provided with a groove (222) for accommodating the buffer ring (25).