Multidirectional supporting retainer for inner and outer pipe bodies

Abstract

The invention discloses an inner and outer pipe body multidirectional supporting retainer which comprises an inner pipe and an outer pipe, the inner pipe and the outer pipe are coaxially supported through a plurality of multidirectional supporting retainers, and in the supporting state, the inner pipe and the outer pipe can rotate relatively; the multidirectional supporting retainer comprises a non-closed-loop embracing ring with a notch, the embracing ring is arranged outside the inner pipe in an embracing mode, and a plurality of supporting legs distributed in a radial mode are arranged on the outer ring of the embracing ring in a circumferential array mode. A linkage system is arranged on the multidirectional supporting retainer, and under the action of the linkage system, the tail ends of the supporting legs do actions far away from the embracing rings while the embracing rings do inward embracing actions; the assembling process is simpler, and a welding process is not needed.

Description

Technical Field

[0001] The invention belongs to the field of inner and outer tube retainers. Background Art

[0002] The coaxial assembly structure of large inner and outer tubes is commonly found in large steam transportation, drum drying equipment, and food machinery and equipment. In the inner and outer tube structure, the maintaining structure used to maintain the coaxiality of the inner and outer tubes is generally called a retaining frame. The existing retaining frame is generally a welded structure. The welded retaining frame requires welding technology during the manufacturing process, which requires the operator to have high professional skills. At the same time, the welded retaining frame cannot realize the relative rotation function of the inner and outer tubes. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a multi-directional support retainer for inner and outer tube bodies, which has a simpler assembly process and does not require welding.

[0004] Technical solution: To achieve the above-mentioned purpose, the present invention provides an inner and outer tube multi-directional support and retaining frame, comprising an inner tube and an outer tube, wherein the inner tube and the outer tube are coaxially supported by a plurality of multi-directional support and retaining frames, and the inner tube and the outer tube can rotate relative to each other in the supported state; the multi-directional support and retaining frame comprises a non-closed loop holding ring with a gap, the holding ring is arranged outside the inner tube, and the outer circle of the holding ring forms a circular array and is provided with a plurality of radially distributed support legs; a linkage system is provided on the multi-directional support and retaining frame, and under the action of the linkage system, the holding ring performs an inward holding action while the ends of each support leg perform a movement away from the holding ring.

[0005] Furthermore, a roller with an outer rim made of elastic material is provided at the end of each supporting leg, and the axis of each roller is parallel to the axis of the inner tube and the outer tube.

[0006] Furthermore, the supporting leg includes a leg sleeve with a rectangular cross-section and a movable leg body. The root of the sleeve is integrally connected to the outer ring of the holding ring, and the movable leg body is movably sleeved in the sleeve opening in the sleeve along the length direction.

[0007] Furthermore, the holding ring is a thin sheet metal ring structure with a certain elasticity.

[0008] Furthermore, a transmission ring is arranged on the outer periphery of the holding ring; each sleeve is hollowed out with a through groove extending in the radial direction of the holding ring, and the transmission ring passes through the through grooves on each sleeve; the outer ring surface of the transmission ring is integrally provided with an inclined protrusion at the position passing through the through grooves on each sleeve, and the side of each inclined protrusion away from the holding ring is a push-up inclined surface that smoothly transitions with the outer ring surface of the transmission ring, and each push-up inclined surface is in limiting contact with one end of the movable leg body in the sleeve away from the roller.

[0009] Furthermore, a structural plate is vertically connected to the outer side of the counterclockwise end of the non-closed loop ring with a gap, and a hollow hole is provided on the structural plate through which the transmission ring passes;

[0010] The inner contour of a section of the transmission ring between the clockwise end and the counterclockwise end of the non-closed loop notched holding ring is arranged with transmission teeth in an array along an arc contour; it also includes a gear meshing with the transmission teeth, the end of the gear shaft of the gear is coaxially fixedly connected with an external hexagonal assisting head, and the gear shaft is coaxially and synchronously connected with a rope drum; it also includes a taut steel wire rope, one end of the steel wire rope is fixedly connected to the clockwise end of the non-closed loop notched holding ring, and the other end is fixedly connected to the bottom of the winding groove of the rope drum; a one-way bearing support is fixedly installed on the side of the structural plate close to the transmission teeth, and the gear shaft is matched on the one-way bearing support through a one-way bearing transmission.

[0011] Furthermore, the first constraint roller and the second constraint roller are rotatably installed on both sides of the structural plate through the first roller bracket and the second roller bracket respectively, and the first constraint roller and the second constraint roller are both rollingly matched with the outer ring surface of the transmission ring; the transmission ring rotates around its own axis under the joint constraints of the first constraint roller, the second constraint roller and the gear.

[0012] Furthermore, the end of each movable leg body is rotatably mounted with a roller through a roller seat; and a plurality of elastic rubber gaskets are arranged in a circle on the inner wall of the holding ring.

[0013] Furthermore, the six supporting legs correspond to the six inclined plane protrusions on the transmission ring respectively, with the counterclockwise end of the transmission ring as the starting point, and the six inclined plane protrusions are respectively the first inclined plane protrusion, the second inclined plane protrusion, the third inclined plane protrusion, the fourth inclined plane protrusion, the fifth inclined plane protrusion and the sixth inclined plane protrusion in the clockwise direction, and the steepness of the pushing inclined planes on the first inclined plane protrusion, the second inclined plane protrusion, the third inclined plane protrusion, the fourth inclined plane protrusion, the fifth inclined plane protrusion and the sixth inclined plane protrusion increases successively; thereby eliminating or suppressing the problem of inconsistent sliding distances of each supporting leg in the sleeve during the process of "step two", so that the inner tube and the outer tube tend to be coaxial under the support of the multi-directional support retainer.

[0014] Furthermore, a working method of the inner and outer tube multi-directional support retainer is provided.

[0015] The multi-directional support holder can be smoothly placed between the coaxial inner tube and outer tube in the initial state; then the outer hexagonal power-assisting head is slowly twisted in a clockwise direction by a manipulator or a tool.

[0016] Beneficial effect: The multi-directional support retainer of the present invention not only provides tight and stable coaxial support for the inner tube and the outer tube, but also realizes the relative rotation function of the inner and outer tubes; at the same time, in terms of operation, it is only necessary to slowly turn the external hexagonal power-assisting head to achieve that the wheel surface of the roller at the end of each supporting leg is tightly and elastically pressed against the inner wall of the outer tube, while at the same time the elastic rubber gasket on the inside of the holding ring tightly holds the outer wall of the inner tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the inner and outer tubes after being assembled by the multi-directional support cage coaxially supported;

[0018] Figure 2 for Figure 1 Disassembly diagram of

[0019] Figure 3 This is the axial view in the initial state of assembly;

[0020] Figure 4 is a schematic diagram of a multi-directional support cage;

[0021] Figure 5 for Figure 4 An enlarged schematic diagram of the area marked 28 in FIG. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] As attached Figures 1 to 5 A multi-directional support holder for inner and outer tubes as shown, Figure 1 and 2 The structure shown in the figure includes an inner tube 2 and an outer tube 1, wherein the inner tube 2 and the outer tube 1 are coaxially supported by a plurality of multi-directional support retainers 3, and in the supported state, the inner tube 2 and the outer tube 1 can rotate relative to each other; the multi-directional support retainer 3 includes a non-closed loop embrace ring 11 with a gap, the embrace ring 11 is arranged outside the inner tube 2, the embrace ring 11 is a thin sheet metal ring structure with a certain elasticity, and the inner wall of the embrace ring 11 is provided with a plurality of elastic rubber gaskets 14 in a circular array; the outer circle of the embrace ring 11 is provided with a plurality of radially distributed support legs 41 in a circular array; a linkage system is provided on the multi-directional support retainer 3, under the action of the linkage system, while the embrace ring 11 is performing an inwardly embracing action, the ends of the support legs 41 are moving away from the embrace ring 11.

[0024] like Figures 3 to 5 As shown, a roller 13 with an outer rim made of elastic material, such as rubber, is disposed at the end of each supporting leg 41 , and the axis of each roller 13 is parallel to the axis of the inner tube 2 and the outer tube 1 .

[0025] like Figure 5The support leg 41 shown includes a leg sleeve 10 with a rectangular cross-section and a movable leg body 8. The root of the sleeve 10 is integrally connected to the outer ring of the holding ring 11, and the movable leg body 8 is movably sleeved in the sleeve opening 9 in the sleeve 10 along the length direction; there is a certain friction between the movable leg body 8 and the inner wall of the sleeve opening 9 in the sleeve 10, which is achieved by a slight interference fit to prevent the movable leg body 8 from falling under the action of gravity when facing downward. The end of each movable leg body 8 is rotatably installed with a roller 13 through a roller seat 12; the outer periphery of the holding ring 11 A transmission ring 4 is provided; each sleeve 10 is hollowed out with a through groove 7 extending in the radial direction of the holding ring 11, and the transmission ring 4 passes through the through groove 7 on each sleeve 10; the transmission ring outer ring surface 4a of the transmission ring 4 is integrally provided with an inclined protrusion 5 at the position where it passes through the through groove 7 on each sleeve 10, and each inclined protrusion 5 has a push-up inclined surface 6 that smoothly transitions with the transmission ring outer ring surface 4a on one side away from the holding ring 11, and each push-up inclined surface 6 is in limiting contact with one end of the movable leg body 8 in the sleeve 10 away from the roller 13.

[0026] like Figure 4 The outer side of the counterclockwise end of the non-closed loop notched holding ring 11 is vertically and integrally connected with a structural plate 23, and a hollow hole 51 is provided on the structural plate 23 through which the transmission ring 4 passes; the inner contour of a section of the transmission ring 4 between the clockwise end and the counterclockwise end of the non-closed loop notched holding ring 11 is arranged with a transmission tooth body 22 in an array along an arc contour; it also includes a gear 16 meshing with the transmission tooth body 22, and the end of the gear shaft 26 of the gear 16 is coaxially fixedly connected with an external hexagonal assisting head 27, and the gear shaft 26 is coaxially and synchronously connected with a rope drum 24; it also includes a taut wire rope 21, one end of the wire rope 21 is fixedly connected to the clockwise end of the non-closed loop notched holding ring 11, and the other end is fixedly connected to the bottom of the winding groove 24.1 of the rope drum 24; a one-way bearing support 25 is fixedly installed on one side of the structural plate 23 close to the transmission tooth body 22, and the gear shaft 26 is matched on the one-way bearing support 25 through the one-way bearing 25.

[0027] The first constraint roller 15 and the second constraint roller 17 are rotatably installed on both sides of the structural plate 23 through the first roller bracket 19 and the second roller bracket 18 respectively. The first constraint roller 15 and the second constraint roller 17 are both rollingly matched with the transmission ring outer ring surface 4a of the transmission ring 4; the transmission ring 4 rotates around its own axis under the joint constraints of the first constraint roller 15, the second constraint roller 17 and the gear 16.

[0028] Working principle: Step 1, the inner tube 2 to be assembled is coaxially arranged with the outer tube 1, and then the multi-directional support holder 3 in the initial state is coaxially placed between the inner tube 2 and the outer tube 1. In the initial state, the holding ring 11 has not yet tightly held the inner tube 2, and the wheel surface of the roller 13 at the end of each support leg 41 has not yet completely contacted the outer tube 1; therefore, the multi-directional support holder 3 can be smoothly placed between the coaxial inner tube 2 and the outer tube 1 in the initial state, such as Figure 3 shown.

[0029] Step 2: Slowly twist the hexagonal booster head 27 in the clockwise direction by a manipulator or tool, so that the gear 16 and the rope drum 24 rotate clockwise synchronously. The gear 16 drives the transmission ring 4 to rotate clockwise around its own axis under the action of meshing, so that each push-up inclined surface 6 gradually pushes the movable leg body 8 outward, so that the wheel surface of the roller 13 at the end of each supporting leg 41 gradually approaches the inner wall of the outer tube 1; the rotation of the rope drum 24 causes the wire rope 21 to be gradually wound in the winding groove 24.1, so that the length of the exposed wire rope 21 is gradually shortened, and the holding ring 1 The clockwise and counterclockwise ends of 1 are gradually pulled closer by the exposed steel wire rope 21 which is gradually shortened, so that the holding ring 11 gradually performs an inward holding action; until the wheel surface of the roller 13 at the end of each supporting leg 41 is tightly and elastically pressed against the inner wall of the outer tube 1, and at the same time, the elastic rubber gasket 14 on the inner side of the holding ring 11 tightly holds the outer wall of the inner tube 2, and due to the existence of the one-way bearing 25, the gear 16 and the rope drum 24 cannot be reversed, thereby realizing the coaxial tight and stable supporting effect of the multi-directional support retainer 3 on the inner tube 2 and the outer tube 1.

[0030] In the process of the above-mentioned "step 2", the structural plate 23 is regarded as a relatively static reference object. When the holding ring 11 performs an inward holding action under the pulling of the gradually shortening exposed steel wire rope 21, from the perspective of the axis of the inner tube 2 and the outer tube 1, each support leg 41 will be correspondingly offset in the clockwise direction, and the farther the support leg 41 is from the structural plate 23 in the clockwise direction on the holding ring 11, the greater the clockwise offset, which causes the relative rotation angle of the transmission ring 4 relative to each support leg 41 in "step 2" to be inconsistent; if the steepness of the push-up inclined surfaces 6 of the six inclined protrusions 5 on the transmission ring 4 are completely consistent, it will cause the sliding distance of each support leg 41 in the sleeve 9 in the process of "step 2" to be inconsistent; in order to offset the problem of inconsistent sliding distances of each support leg 41 in the sleeve 9, the following structural arrangements are made:

[0031] like Figure 3 , the six supporting legs 41 correspond to the six inclined surface protrusions 5 on the transmission ring 4 respectively, with the counterclockwise end of the transmission ring 4 as the starting point, and the six inclined surface protrusions 5 are the first inclined surface protrusion 5.1, the second inclined surface protrusion 5.2, the third inclined surface protrusion 5.3, the fourth inclined surface protrusion 5.4, the fifth inclined surface protrusion 5.5 and the sixth inclined surface protrusion 5.6 in the clockwise direction, and the steepness of the pushing inclined surface 6 on the first inclined surface protrusion 5.1, the second inclined surface protrusion 5.2, the third inclined surface protrusion 5.3, the fourth inclined surface protrusion 5.4, the fifth inclined surface protrusion 5.5 and the sixth inclined surface protrusion 5.6 increases successively; thereby eliminating or suppressing the problem of inconsistent sliding distances of each supporting leg 41 in the sleeve 9 during the process of "step two", so that the inner tube 2 and the outer tube 1 tend to be coaxial under the support of the multi-directional support retainer 3.

[0032] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A multi-directional support holder for inner and outer tubes, characterized in that: The invention comprises an inner tube (2) and an outer tube (1), wherein the inner tube (2) and the outer tube (1) are coaxially supported by a plurality of multi-directional support retaining frames (3), and in a supported state, the inner tube (2) and the outer tube (1) can rotate relative to each other; the multi-directional support retaining frame (3) comprises a non-closed loop embrace ring (11) with a gap, the embrace ring (11) is arranged outside the inner tube (2), and the outer ring of the embrace ring (11) is provided with a plurality of support legs (41) distributed radially in a circular array; a linkage system is provided on the multi-directional support retaining frame (3), and under the action of the linkage system, the embrace ring (11) performs an inward embrace action while the ends of the support legs (41) perform an action away from the embrace ring (11).

2. The inner and outer tube multi-directional support holder according to claim 1, characterized in that: The end of each supporting leg (41) is provided with a roller (13) whose outer rim is made of elastic material, and the axis of each roller (13) is parallel to the axis of the inner tube (2) and the outer tube (1).

3. The inner and outer tube multi-directional support holder according to claim 3, characterized in that: The support leg (41) comprises a leg sleeve (10) with a rectangular cross-section and a movable leg body (8); the root of the sleeve (10) is integrally connected to the outer ring of the holding ring (11); and the movable leg body (8) is movably sleeved in a sleeve opening (9) inside the sleeve (10) along the length direction.

4. The inner and outer tube multi-directional support holder according to claim 3, characterized in that: The holding ring (11) is a thin sheet metal ring structure with certain elasticity.

5. The inner and outer tube multi-directional support holder according to claim 4, characterized in that: A transmission ring (4) is arranged on the outer periphery of the holding ring (11); each of the sleeves (10) is hollowed out with a through groove (7) extending in the radial direction of the holding ring (11), and the transmission ring (4) passes through the through groove (7) on each of the sleeves (10); an inclined protrusion (5) is integrally arranged on the outer ring surface (4a) of the transmission ring (4) at the position passing through the through groove (7) on each of the sleeves (10), and a side of each inclined protrusion (5) away from the holding ring (11) is a push-up inclined surface (6) that smoothly transitions with the outer ring surface (4a) of the transmission ring, and each of the push-up inclined surfaces (6) is in limiting contact with one end of the movable leg body (8) in the sleeve (10) away from the roller (13).

6. The inner and outer tube multi-directional support holder according to claim 5, characterized in that: A structural plate (23) is vertically and integrally connected to the outer side of the counterclockwise end of the non-closed loop notched holding ring (11), and a hollow hole (51) through which the transmission ring (4) passes is provided on the structural plate (23); The inner contour of a section of the transmission ring (4) between the clockwise end and the counterclockwise end of the non-closed loop notched holding ring (11) is arranged with transmission teeth (22) in an array along an arc contour; it also includes a gear (16) meshing with the transmission teeth (22), the end of the gear shaft (26) of the gear (16) is coaxially fixedly connected with an external hexagonal assisting head (27), and the gear shaft (26) is coaxially synchronously connected with a rope drum (24); it also includes a taut steel wire rope (21), one end of the steel wire rope (21) is fixedly connected to the clockwise end of the non-closed loop notched holding ring (11), and the other end is fixedly connected to the bottom of the winding groove (24.1) of the rope drum (24); a one-way bearing support (25) is fixedly installed on the side of the structural plate (23) close to the transmission teeth (22), and the gear shaft (26) is driven and matched on the one-way bearing support (25) through the one-way bearing (25).

7. The inner and outer tube multi-directional support holder according to claim 6, characterized in that: A first constraint roller (15) and a second constraint roller (17) are rotatably mounted on both sides of the structural plate (23) through a first roller bracket (19) and a second roller bracket (18), respectively; the first constraint roller (15) and the second constraint roller (17) are both in rolling cooperation with the transmission ring outer ring surface (4a) of the transmission ring (4); the transmission ring (4) rotates around its own axis under the joint constraints of the first constraint roller (15), the second constraint roller (17) and the gear (16).

8. The inner and outer tube multi-directional support holder according to claim 7, characterized in that: The end of each movable leg body (8) is rotatably mounted on the roller (13) via a roller seat (12); the inner wall of the holding ring (11) is provided with a plurality of elastic rubber gaskets (14) arranged in a circle.

9. The inner and outer tube multi-directional support holder according to claim 8, characterized in that: The six supporting legs (41) are respectively connected to the six inclined surface protrusions (5) on the transmission ring (4), and the six inclined surface protrusions (5) are sequentially arranged in a clockwise direction, namely, a first inclined surface protrusion (5.1), a second inclined surface protrusion (5.2), a third inclined surface protrusion (5.3), a fourth inclined surface protrusion (5.4), a fifth inclined surface protrusion (5.5) and a sixth inclined surface protrusion (5.6), with the counterclockwise end of the transmission ring (4) being the starting point. The steepness of the push-up inclined surfaces (6) on the second inclined surface protrusion (5.2), the third inclined surface protrusion (5.3), the fourth inclined surface protrusion (5.4), the fifth inclined surface protrusion (5.5) and the sixth inclined surface protrusion (5.6) increases successively; thereby eliminating or suppressing the problem of inconsistent sliding distances of the support legs (41) in the sleeve (9) during "step two", so that the inner tube (2) and the outer tube (1) tend to be coaxial under the support of the multi-directional support retainer (3).

10. A method for operating the inner and outer tube multi-directional support holder according to claim 9, characterized in that: The multi-directional support holder (3) can be smoothly placed between the coaxial inner tube (2) and outer tube (1) in the initial state; then the outer hexagonal assisting head (27) is slowly twisted in the clockwise direction by a manipulator or a tool.

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