Double-wall tubular column-shaped support

Abstract

The invention relates to the technical field of supports, in particular to a double-wall tubular column support which comprises a rubber band, the rubber band is arranged on a tube body of an inner tube in a sleeving mode, a rear elastic clamping plate is arranged on one side of the rubber band in a buckled mode, a connecting plate is installed on the surface of the elastic clamping plate, a limiting sleeve is fixed to the surface of the connecting plate, and a telescopic pressing head is inserted into the limiting sleeve. Rubber blocks are fixed to the surfaces of the telescopic pressing head and the connecting plate, a first air bag ball is fixed between the two rubber blocks, a second rubber sleeve is integrally formed at one end of each rubber block, a spring is fixed between the two second rubber sleeves, a second air bag ball is embedded in the end, extending out of the limiting sleeve, of the telescopic pressing head, and the second air bag ball abuts against the position between the inner wall of the outer pipe and the telescopic pressing head. The outer pipe sleeves the outer side of the inner pipe; the invention has the beneficial effects that: by adopting an elastic design, stress and deformation caused by temperature change, vibration and the like can be effectively absorbed and dispersed, so that a stable position relationship between the inner pipe and the outer pipe is kept, and the stability and the reliability of the whole system are improved.

Description

Technical Field

[0001] The invention relates to the field of stents, in particular to a double-wall tubular stent. Background Art

[0002] At present, vacuum double-walled tubes are often used as key components. These components operate in extreme environments, such as high temperature, high pressure, strong radiation or high vacuum. The vacuum double-walled tube consists of two layers of inner and outer tubes. The inner tube is used to transmit the medium (such as gas, liquid or special materials), while the outer tube provides protection and support. Since there is a certain space between the inner and outer tubes, in order to maintain the stability and rigidity of the structure and prevent the inner and outer tubes from moving or deforming relative to each other under extreme conditions, an effective support structure needs to be set between the inner and outer tubes.

[0003] Traditional stent designs often use rigid materials, such as metal stents, but in a vacuum environment, metals may deform or experience stress concentration due to temperature changes, radiation, and other factors, which can affect the reliability and stability of the stent. In addition, metal stents may also chemically react with the tube material under vacuum conditions, further damaging the performance of the entire system.

[0004] Therefore, it is particularly important to design an elastic bracket that can remain stable under vacuum conditions and avoid chemical reactions with the tube material. This bracket needs to have a certain degree of elasticity to cope with external factors such as temperature changes and vibrations, and it also needs to be made of suitable materials to ensure long-term stability and safety in a vacuum environment. Summary of the invention

[0005] The object of the present invention is to provide a double-wall tubular columnar bracket to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a double-wall tubular column bracket, comprising a rubber belt, which is sleeved on the tube body of an inner tube, a rear elastic splint is buckled on one side of the rubber belt, a connecting plate is installed on the surface of the elastic splint, a limiting sleeve is fixed on the surface of the connecting plate, a telescopic pressure head is plugged into the inside of the limiting sleeve, rubber blocks are fixed on the surfaces of the telescopic pressure head and the connecting plate, an airbag ball 1 is fixed between the two rubber blocks, and a rubber sleeve 2 is integrally formed at one end of the rubber block, a spring is fixed between the two rubber sleeves 2, an end of the telescopic pressure head extending out of the limiting sleeve is embedded with an airbag ball 2, the airbag ball 2 is against the inner wall of the outer tube and the telescopic pressure head, and the outer tube is sleeved on the outside of the inner tube.

[0007] Preferably, the rubber belt has an annular plate-like structure. A limiting groove is formed on the inner ring surface of the rubber belt. There are multiple limiting grooves, and the multiple limiting grooves are arranged and distributed along the inner ring surface of the rubber belt. The limiting grooves correspond to the elastic clamping plates one by one. The elastic clamping plate has a "C"-shaped plate-like structure. One plate body of the elastic clamping plate is inserted into the limiting groove. The width of the elastic clamping plate is equal to the width of the limiting groove. The thickness of the plate body of the elastic clamping plate inserted into the limiting groove is less than the depth of the limiting groove. Clamping strips are fixed on both side plates of the elastic clamping plate that are parallel to each other. The clamping strips are clamped between the elastic clamping plate and the rubber belt to prevent the elastic clamping plate from coming off and being limited on the rubber belt.

[0008] Preferably, a notch is formed on one side of the rubber belt. The notch corresponds to the limiting groove one by one, and the notch communicates with the corresponding limiting groove. A clamping groove and an elastic insertion piece are respectively arranged on both side plates of the elastic clamping plate that are parallel to each other. The clamping groove is a "T"-shaped groove, and the elastic insertion piece is inserted into the clamping groove.

[0009] Preferably, fitting grooves I are formed on both sides of the elastic insertion piece. A clamping head is inserted into the fitting groove I. A rubber supporting block is fixed at one end of the clamping head extending into the fitting groove I. One end of the rubber supporting block is fixed on the surface of the fitting groove I. In the initial state, the rubber supporting block pushes the other end of the clamping head out of the fitting groove I. An inclined surface is arranged at the other end of the fitting groove I. After the elastic insertion piece penetrates through the clamping groove, the clamping head is lapped on the stepped surface of the clamping groove.

[0010] Preferably, through holes are formed on the surface of the connecting plate. There are multiple through holes, and the multiple through holes are arranged and distributed with the limiting sleeve as the central axis. Screws are inserted into the through holes. After the screws penetrate through the through holes, they are screwed on the surface of the elastic clamping plate.

[0011] Preferably, guiding grooves are formed on the top surface of the limiting sleeve. There are multiple guiding grooves, and the multiple guiding grooves are arranged and distributed equidistantly and equally sized along the inner ring surface of the limiting sleeve. A sliding block is slidably connected inside the guiding groove. The sliding block is fixed on the surface of the telescopic pressing head. The height of the sliding block is less than the height of the telescopic pressing head. The height of the guiding groove is greater than the height of the telescopic pressing head. An arc-shaped slope is arranged at the top end of the telescopic pressing head.

[0012] Preferably, an elastic belt gasket is fixed on the top surface of the limiting sleeve. The elastic belt gasket has an annular plate-like structure. The inner ring diameter of the elastic belt gasket is equal to the inner ring diameter of the limiting sleeve. An elastic belt strip is integrally formed on the bottom surface of the elastic belt gasket. The elastic belt strip corresponds to the guiding groove one by one. The bottom end of the elastic belt strip is fixed on the top surface of the sliding block. When the telescopic pressing head is lifted and supported, the elastic belt strip is in the initial state. When the telescopic pressing head is compressed and pushed into the limiting sleeve, the telescopic pressing head generates elastic deformation by张拉 the elastic belt strip through the sliding block.

[0013] Preferably, the rubber block has a trapezoidal structure, an arc surface is provided at one end of the rubber block facing the airbag ball, the airbag ball is embedded in the arc surface, a rubber sleeve is integrally formed on the outer wall of the airbag ball, the rubber sleeve has a trapezoidal ring structure, two rubber sleeves are provided, the two rubber sleeves are symmetrically distributed about the airbag ball, and one rubber sleeve is fixed to one end of the rubber block.

[0014] Preferably, the rubber sleeve 2 is an annular plate structure with an "L"-shaped cross section, and the two ends of the spring are respectively fixed on the surfaces of the two rubber sleeves 2.

[0015] Preferably, one end of the telescopic pressure head is provided with an embedding groove 2, which is an arc-shaped groove, and the airbag ball 2 is fixed in the embedding groove 2, and the airbag ball 2 protrudes from the embedding groove 2 in the initial state.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The double-wall tubular column bracket proposed in the present invention adopts an elastic design, which can effectively absorb and disperse the stress and deformation caused by temperature changes, vibrations, etc., so as to maintain a stable position relationship between the inner and outer tubes and improve the stability and reliability of the entire system; the materials used in the bracket (such as rubber bands, rubber blocks, airbag balls, etc.) are all non-metallic materials with good chemical stability. They will not chemically react with the inner and outer tube materials under vacuum conditions, thereby extending the service life of the system; the bracket realizes rapid installation and disassembly between the inner tube and the outer tube through the design of rubber bands and elastic splints, without the need for complicated tools and operations, greatly improving the installation efficiency; by adjusting the number and position of the elastic splints, the support strength and distribution of the bracket can be flexibly adjusted to meet the needs of vacuum double-wall tubes of different sizes and shapes. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 Structural cross-section view at AA in the middle; Figure 3 for Figure 2 A schematic diagram of the structure enlargement in the middle; Figure 4 for Figure 3 A magnified schematic diagram of the structure at B in the middle; Figure 5 It is a schematic diagram of the connection structure between the rubber belt and the elastic splint of the present invention; Figure 6 for Figure 5 Top view of the structure; Figure 7 for Figure 6 Structural cross-section view at the middle BB; Figure 8 for Figure 7 A magnified schematic diagram of the structure at B in the middle; Fig. 9 for Figure 8 A magnified schematic diagram of the structure at C in the middle; Fig.10 This is a schematic diagram of the structure of the rubber belt of the present invention; Fig.11 It is a schematic diagram of the connection structure between the elastic belt gasket and the elastic belt strip of the present invention; Fig.12 It is a schematic diagram of the connection structure between the rubber block and the airbag ball of the present invention; Fig.13 It is a schematic diagram of the connection structure between the elastic splint and the limiting sleeve of the present invention; Fig.14 This is a schematic diagram of the connection structure of the connection plate and the limit sleeve of the present invention; Fig.15 It is a schematic diagram of the structure of the telescopic pressure head of the present invention.

[0017] In the figure: rubber belt 1, inner tube 2, outer tube 3, limiting groove 4, elastic splint 5, missing groove 6, card slot 7, elastic insert 8, embedded groove 1 9, card head 10, rubber support block 11, clamping strip 12, connecting plate 13, limiting sleeve 14, telescopic pressure head 15, rubber block 16, airbag ball 1 17, rubber sleeve 1 18, rubber sleeve 2 19, spring 20, guide groove 21, slider 22, elastic belt gasket 23, elastic belt strip 24, embedded groove 2 25, airbag ball 2 26. DETAILED DESCRIPTION

[0018] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] For example, see Figure 1-Figure 3, the present invention provides a technical solution: a double-wall tube columnar stent, including a rubber belt 1, the rubber belt 1 is sleeved on the tube body of the inner tube 2, one side of the rubber belt 1 is buckled with an elastic splint 5, a connecting plate 13 is installed on the surface of the elastic splint 5, a limiting sleeve 14 is fixed on the surface of the connecting plate 13, a telescopic pressing head 15 is inserted into the inside of the limiting sleeve 14, rubber blocks 16 are fixed on the surfaces of the telescopic pressing head 15 and the connecting plate 13, an airbag ball one 17 is fixed between the two rubber blocks 16, and a rubber sleeve two 19 is integrally formed at one end of the rubber block 16, a spring 20 is fixed between the two rubber sleeves two 19, an airbag ball two 26 is embedded at one end of the telescopic pressing head 15 extending out of the limiting sleeve 14, the airbag ball two 26 abuts between the inner wall of the outer tube 3 and the telescopic pressing head 15, and the outer tube 3 is sleeved on the outside of the inner tube 2.

[0020] Select the required number of elastic splints 5 according to needs and install them on the rubber belt 1, and a limiting sleeve 14 and a telescopic pressing head 15 are installed on the surface of each elastic splint 5. After the required elastic splints 5 are installed on the rubber belt 1, sleeve the rubber belt 1 on the inner tube 2, and then sleeve the outer tube 3 on the outside of the inner tube 2. At this time, the limiting sleeve 14 and the telescopic pressing head 15 are between the inner tube 2 and the outer tube 3 as an elastic support structure, realizing the rapid installation of an elastic bracket between the inner tube 2 and the outer tube 3.

[0021] Embodiment 2, referring to the attached Figure 8 and Fig. 9 As shown, on the basis of Embodiment 1, in order to install the elastic splint 5 on the rubber belt 1, the rubber belt 1 is in an annular plate structure, a limiting groove 4 is opened on the inner ring surface of the rubber belt 1, there are multiple limiting grooves 4, and the multiple limiting grooves 4 are arranged and distributed along the inner ring surface of the rubber belt 1. The limiting grooves 4 and the elastic splints 5 are in one-to-one correspondence. The elastic splint 5 is in a "C"-shaped plate structure. One plate body of the elastic splint 5 is inserted into the limiting groove 4. The width of the elastic splint 5 is equal to the width of the limiting groove 4. The thickness of the plate body of the elastic splint 5 inserted into the inside of the limiting groove 4 is less than the depth of the limiting groove 4. Clamping strips 12 are fixed on both side plates of the elastic splint 5 distributed in parallel. The clamping strips 12 are clamped between the elastic splint 5 and the rubber belt 1 to prevent the elastic splint 5 from being disengaged and limited on the rubber belt 1.

[0022] First of all, it should be noted that the elastic splint 5 has elasticity. When the two side plates of the elastic splint 5 are elastically掰开 (the correct word should be "opened"), when there is no external force to open the elastic splint 5, the two side plates of the elastic splint 5 are parallel. Buckle the elastic splint 5 on one side of the rubber belt 1. The distance between the two side plates of the elastic splint 5 is less than the thickness of the rubber belt 1. Therefore, the two side plates of the elastic splint 5 squeeze the clamping strips 12 to clamp the rubber belt 1, increasing the resistance between the elastic splint 5 and the rubber belt 1 and preventing the elastic splint 5 from falling off the rubber belt 1.

[0023] A notch 6 is provided on one side of the rubber belt 1. The notch 6 corresponds to the limiting groove 4 one by one, and the notch 6 is connected to the corresponding limiting groove 4. A card slot 7 and an elastic insert 8 are respectively provided on two parallel side plates of the elastic clamp 5. The card slot 7 is a "T"-shaped slot, and the elastic insert 8 is inserted into the card slot 7; both sides of the elastic insert 8 are provided with an embedding groove 9, and a clamping head 10 is inserted into the inside of the embedding groove 9. A rubber support block 11 is fixed to the end of the clamping head 10 extending into the embedding groove 9. One end of the rubber support block 11 is fixed to the surface of the embedding groove 9. In the initial state, the rubber support block 11 pushes the other end of the clamping head 10 out of the embedding groove 9. The other end of the embedding groove 9 is provided with an inclined surface. After the elastic insert 8 passes through the card slot 7, the clamping head 10 overlaps the stepped surface of the card slot 7.

[0024] When the two side plates are reset, the top of the elastic plug 8 passes through the slot 7, and the clamping head 10 overlaps the stepped surface of the slot 7 to prevent the elastic plug 8 from being pulled out of the slot 7. At this time, the elastic plug 8 is in the missing groove 6. When the elastic splint 5 needs to be removed from the rubber band 1, two fingers push the two clamping heads 10 into the corresponding embedding grooves 9 respectively. At this time, the clamping heads 10 squeeze the corresponding rubber support blocks 11 to produce elastic deformation. When the clamping heads 10 no longer block the top of the slot 7, the two side plates of the elastic splint 5 are opened, the elastic plug 8 is slightly deformed, and the elastic plug 8 is pulled out of the slot 7. Then the elastic splint 5 can be pulled out from one side of the rubber band 1.

[0025] Embodiment 3, refer to the attached Figure 4 , Figures 11 to 15On the basis of the second embodiment, in order to realize the telescopic installation of the telescopic pressure head 15 on the elastic clamping plate 5, a perforation is provided on the surface of the connecting plate 13, and a plurality of perforations are provided. The plurality of perforations are arranged and distributed with the limiting sleeve 14 as the central axis. Screws are inserted into the inside of the perforations, and the screws are screwed to the surface of the elastic clamping plate 5 after passing through the perforations; a guide groove 21 is provided on the top surface of the limiting sleeve 14, and a plurality of guide grooves 21 are provided. The plurality of guide grooves 21 are arranged and distributed at equal distances and in equal sizes along the inner ring surface of the limiting sleeve 14, and a slider 22 is slidably connected to the inside of the guide groove 21. The slider 22 is fixed on the surface of the telescopic pressure head 15, and the height of the slider 22 is less than the height of the telescopic pressure head 15. The guide groove 21 The height is greater than the height of the telescopic pressure head 15, and the top of the telescopic pressure head 15 is provided with an arc-shaped slope; an elastic band gasket 23 is fixed to the top surface of the limiting sleeve 14, and the elastic band gasket 23 is an annular plate structure. The inner ring diameter of the elastic band gasket 23 is equal to the inner ring diameter of the limiting sleeve 14, and the bottom surface of the elastic band gasket 23 is integrally formed with an elastic band strip 24, and the elastic band strip 24 corresponds to the guide groove 21 one by one. The bottom end of the elastic band strip 24 is fixed to the top surface of the slider 22. When the telescopic pressure head 15 is supported and lifted, the elastic band strip 24 is in an initial state. When the telescopic pressure head 15 is compressed downward into the limiting sleeve 14, the telescopic pressure head 15 tensions the elastic band strip 24 through the slider 22 to produce elastic deformation.

[0026] The connecting plate 13 is fixed to the elastic clamping plate 5 by screws, so that the limiting sleeve 14 can be replaced separately when it is damaged. The reason why the slider 22 is fixed on the surface of the telescopic pressure head 15 and the guide groove 21 is provided on the inner wall of the limiting sleeve 14 to cooperate with the slider 22 is to prevent the telescopic pressure head 15 from rotating in the limiting sleeve 14, and only the telescopic pressure head 15 can be vertically moved in the limiting sleeve 14, and the elastic belt gasket 23 is fixed to one end of the limiting sleeve 14, and the elastic belt gasket 23 and the slider 22 are connected by an elastic belt strip 24. When the outer tube 3 is slightly deflected, the outer tube 3 pushes the telescopic pressure head 15 to retract into the limiting sleeve 14. At this time, the telescopic pressure head 15 is elastically deformed by tensioning the elastic band 24 through the slider 22. The resilience of the elastic band 24 pulls the slider 22 to drive the telescopic pressure head 15 to continue to resist the inner wall of the outer tube 3, and cooperates with the resilience of the spring 20 to form an elastic support structure between the inner tube 2 and the outer tube 3.

[0027] Embodiment 4, on the basis of embodiment 3, in order to optimize the elastic supporting structure between the telescopic pressure head 15 and the connecting plate 13, the rubber block 16 is of a trapezoidal structure, and the end of the rubber block 16 facing the airbag ball 17 is provided with an arc surface, and the airbag ball 17 is embedded in the arc surface. The outer wall of the airbag ball 17 is integrally formed with a rubber sleeve 18, and the rubber sleeve 18 is of a trapezoidal circular ring structure. There are two rubber sleeves 18, and the two rubber sleeves 18 are symmetrically distributed about the airbag ball 17, and the rubber sleeve 18 is fixed on one end of the rubber block 16; the rubber sleeve 2 19 is of an annular plate structure with an "L"-shaped cross section, and the two ends of the spring 20 are respectively fixed on the surfaces of the two rubber sleeves 2 19; one end of the telescopic pressure head 15 is provided with an embedding groove 25, and the embedding groove 25 is an arc groove, and the airbag ball 26 is fixed in the embedding groove 25, and the airbag ball 26 protrudes from the embedding groove 25 in the initial state. It should be noted that the elastic component between the telescopic pressure head 15 and the connecting plate 13 is composed of a rubber block 16, an airbag ball 17, a rubber sleeve 18, a rubber sleeve 2 19 and a spring 20. Compared with using the spring 20 alone, the rubber block 16 and the airbag ball 17 are connected and supported between the telescopic pressure head 15 and the connecting plate 13 to avoid the phenomenon that the two ends of the spring 20 fall off and cannot support the telescopic pressure head 15. When the telescopic pressure head 15 is compressed and inserted into the limit sleeve 14, the two rubber blocks 16 squeeze the airbag ball 17 to deform. As the telescopic pressure head 15 continues to retract into the limit sleeve 14, the rubber block 16 will also be squeezed and deformed.

[0028] Embodiment 5, based on embodiment 4, proposes a method for using a double-wall tubular columnar stent, comprising the following steps: Step 1: Select the required number of elastic clamps 5 and install them on the rubber belt 1 according to the needs, and install the limit sleeve 14 and the telescopic pressure head 15 on the surface of each elastic clamp 5. After the required elastic clamps 5 are installed on the rubber belt 1, the rubber belt 1 is sleeved on the inner tube 2, and then the outer tube 3 is sleeved on the outer side of the inner tube 2. At this time, the limit sleeve 14 and the telescopic pressure head 15 are between the inner tube 2 and the outer tube 3 as an elastic support structure, so that the elastic bracket can be quickly installed between the inner tube 2 and the outer tube 3; Step 2: The elastic splint 5 is elastic, and two parallel side plates of the elastic splint 5 are elastically pried apart. When there is no external force to pry apart the elastic splint 5, the two side plates of the elastic splint 5 are parallel, and the elastic splint 5 is buckled on one side of the rubber band 1. The distance between the two side plates of the elastic splint 5 is less than the thickness of the rubber band 1. Therefore, the two side plates of the elastic splint 5 squeeze the clamping strip 12 to clamp the rubber band 1, thereby increasing the resistance between the elastic splint 5 and the rubber band 1, and preventing the elastic splint 5 from falling off the rubber band 1; When the two side plates are reset, the top of the elastic plug 8 passes through the slot 7, and the clamping head 10 overlaps the stepped surface of the slot 7 to prevent the elastic plug 8 from being pulled out of the slot 7. At this time, the elastic plug 8 is in the missing groove 6. When the elastic splint 5 needs to be removed from the rubber band 1, two fingers push the two clamping heads 10 into the corresponding embedding grooves 9 respectively. At this time, the clamping heads 10 squeeze the corresponding rubber support blocks 11 to produce elastic deformation. When the clamping heads 10 no longer block the top of the slot 7, the two side plates of the elastic splint 5 are opened, the elastic plug 8 is slightly deformed, and the elastic plug 8 is pulled out of the slot 7. Then the elastic splint 5 is pulled out of one side of the rubber band 1. Step 4: Fix the connecting plate 13 to the elastic clamping plate 5 by screws, so as to facilitate the replacement of the limit sleeve 14 when it is damaged. The reason why the slider 22 is fixed on the surface of the telescopic pressure head 15 and the guide groove 21 is provided on the inner wall of the limit sleeve 14 to match the slider 22 is to prevent the telescopic pressure head 15 from rotating in the limit sleeve 14, and only the telescopic pressure head 15 can move vertically in the limit sleeve 14, and the elastic belt gasket 23 is fixed to one end of the limit sleeve 14, and the elastic belt gasket 23 and the slider 22 are connected by an elastic belt strip 24. When the strip 24 is in the initial state, it pulls the slider 22. At this time, the telescopic pressure head 15 protrudes from the limiting sleeve 14, that is, one end of the telescopic pressure head 15 is against the inner wall of the outer tube 3. When the outer tube 3 is slightly deflected, the outer tube 3 pushes the telescopic pressure head 15 to retract into the limiting sleeve 14. At this time, the telescopic pressure head 15 is elastically deformed by tensioning the elastic strip 24 through the slider 22. The rebound force of the elastic strip 24 pulls the slider 22 to drive the telescopic pressure head 15 to continue to resist the inner wall of the outer tube 3, and cooperates with the rebound force of the spring 20 to form an elastic support structure between the inner tube 2 and the outer tube 3.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-walled tubular columnar support, comprising a rubber band (1), characterized in that: The rubber belt (1) is sleeved on the tube body of the inner tube (2). One side of the rubber belt (1) is buckled with an elastic splint (5). A connecting plate (13) is installed on the surface of the elastic splint (5). A limit sleeve (14) is fixed on the surface of the connecting plate (13). A telescopic pressure head (15) is inserted into the limit sleeve (14). Rubber blocks (16) are fixed on the surfaces of the telescopic pressure head (15) and the connecting plate (13). An airbag ball one (17) is fixed between the two rubber blocks (16). One end of the rubber block (16) is integrally formed with a rubber sleeve two (19). A spring (20) is fixed between the two rubber sleeves two (19). An airbag ball two (26) is embedded at one end of the telescopic pressure head (15) extending out of the limit sleeve (14). The airbag ball two (26) is pressed between the inner wall of the outer tube (3) and the telescopic pressure head (15). The outer tube (3) is sleeved on the outside of the inner tube (2).

2. A double-walled tubular columnar bracket according to claim 1, characterized in that: The rubber belt (1) is in an annular plate structure. A limit groove (4) is opened on the inner ring surface of the rubber belt (1). There are multiple limit grooves (4), and the multiple limit grooves (4) are arranged and distributed along the inner ring surface of the rubber belt (1). The limit grooves (4) and the elastic splints (5) are in one-to-one correspondence. The elastic splint (5) is in a "匚”-shaped plate structure. One plate body of the elastic splint (5) is inserted into the limit groove (4). The width of the elastic splint (5) is equal to the width of the limit groove (4). The thickness of the plate body of the elastic splint (5) inserted into the limit groove (4) is less than the depth of the limit groove (4). Clamping strips (12) are fixed on both side plates of the elastic splint (5) distributed in parallel. The clamping strips (12) are clamped between the elastic splint (5) and the rubber belt (1) to prevent the elastic splint (5) from being disengaged and limit its position on the rubber belt (1).

3. A double-wall tubular columnar bracket according to claim 2, characterized in that: A notch (6) is opened on one side of the rubber belt (1). The notch (6) and the limit groove (4) are in one-to-one correspondence, and the notch (6) communicates with the corresponding limit groove (4). A clamping groove (7) and an elastic insert piece (8) are respectively arranged on the two side plates of the elastic splint (5) distributed in parallel. The clamping groove (7) is in a "T”-shaped groove, and the elastic insert piece (8) is inserted into the clamping groove (7).

4. The double-walled tubular column bracket according to claim 3, characterized in that: Installation grooves one (9) are opened on both sides of the elastic insert piece (8). A clamping head (10) is inserted into the installation grooves one (9). A rubber support block (11) is fixed at one end of the clamping head (10) extending into the installation grooves one (9). One end of the rubber support block (11) is fixed on the surface of the installation grooves one (9). In the initial state, the rubber support block (11) pushes the other end of the clamping head (10) out of the installation grooves one (9). An inclined surface is arranged at the other end of the installation grooves one (9). After the elastic insert piece (8) penetrates through the clamping groove (7), the clamping head (10) is lapped on the stepped surface of the clamping groove (7).

5. The double-walled tubular column bracket according to claim 1, characterized in that: Perforations are opened on the surface of the connecting plate (13). There are multiple perforations, and the multiple perforations are arranged and distributed with the limit sleeve (14) as the central axis. Screws are inserted into the perforations. After passing through the perforations, the screws are screwed on the surface of the elastic splint (5).

6. The double-wall tubular column bracket according to claim 1, characterized in that: The top surface of the limiting sleeve (14) is provided with a guide groove (21), a plurality of guide grooves (21) are provided, and the plurality of guide grooves (21) are arranged and distributed at equal distances and in equal sizes along the inner ring surface of the limiting sleeve (14), a slider (22) is slidably connected inside the guide groove (21), the slider (22) is fixed on the surface of the telescopic pressure head (15), the height of the slider (22) is less than the height of the telescopic pressure head (15), the height of the guide groove (21) is greater than the height of the telescopic pressure head (15), and a circular arc slope is provided on the top of the telescopic pressure head (15).

7. The double-wall tubular column bracket according to claim 6, characterized in that: An elastic band gasket (23) is fixed to the top surface of the limiting sleeve (14), the elastic band gasket (23) is an annular plate structure, the inner ring diameter of the elastic band gasket (23) is equal to the inner ring diameter of the limiting sleeve (14), and an elastic band strip (24) is integrally formed on the bottom surface of the elastic band gasket (23), the elastic band strip (24) and the guide groove (21) correspond one to one, the bottom end of the elastic band strip (24) is fixed to the top surface of the slider (22), when the telescopic pressure head (15) is supported and lifted, the elastic band strip (24) is in an initial state, and when the telescopic pressure head (15) is pressed downward into the limiting sleeve (14), the telescopic pressure head (15) tensions the elastic band strip (24) through the slider (22) to generate elastic deformation.

8. The double-wall tubular column bracket according to claim 1, characterized in that: The rubber block (16) has a trapezoidal structure. An arc surface is provided at one end of the rubber block (16) facing the airbag ball (17). The airbag ball (17) is embedded in the arc surface. A rubber sleeve (18) is integrally formed on the outer wall of the airbag ball (17). The rubber sleeve (18) has a trapezoidal ring structure. Two rubber sleeves (18) are provided. The two rubber sleeves (18) are symmetrically distributed about the airbag ball (17) in the upper and lower directions. The rubber sleeve (18) is fixedly mounted on one end of the rubber block (16).

9. The double-walled tubular column bracket according to claim 1, characterized in that: The rubber sleeves (19) are in the form of an annular plate structure with an L-shaped cross section, and the two ends of the spring (20) are respectively fixed on the surfaces of the two rubber sleeves (19).

10. The double-wall tubular column bracket according to claim 1, characterized in that: The telescopic pressure head (15) is provided with a second embedding groove (25) at one end. The second embedding groove (25) is an arc-shaped groove. The second airbag ball (26) is fixed in the second embedding groove (25). In the initial state, the second airbag ball (26) protrudes from the second embedding groove (25).

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