CN216192870U - Telescopic anti-bending corrugated pipe structure - Google Patents
Telescopic anti-bending corrugated pipe structure Download PDFInfo
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- CN216192870U CN216192870U CN202122529483.2U CN202122529483U CN216192870U CN 216192870 U CN216192870 U CN 216192870U CN 202122529483 U CN202122529483 U CN 202122529483U CN 216192870 U CN216192870 U CN 216192870U
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Abstract
The utility model discloses a telescopic anti-bending corrugated pipe structure, which comprises a corrugated pipe combined pipeline and a combined guide cylinder, wherein the corrugated pipe combined pipeline is sleeved in the combined guide cylinder; the corrugated pipe combined pipeline comprises a plurality of corrugated pipes and an inner sleeve, and the nominal diameter of the plurality of corrugated pipes is gradually reduced from top to bottom; an inner sleeve is sleeved in the corrugated pipe at the lowermost end, the inner sleeve penetrates through the bottom of the corrugated pipe at the lowermost end, and the inner sleeve penetrates out of the top of the corrugated pipe at the lowermost end; the number of the guide cylinders of the combined guide cylinder is one less than that of the corrugated pipes, and the diameter of the combined guide cylinder is gradually reduced from top to bottom. The utility model adopts the structure of the guide cylinder and the inner sleeve, thereby limiting the bending of the corrugated pipe in the using process and effectively controlling the vibration amplitude. The utility model fully utilizes the characteristic of larger axial elastic coefficient of the slender corrugated pipe, can axially extend and retract integrally, and is suitable for two joints with relative motion.
Description
Technical Field
The utility model relates to the technical field of pipeline connection, in particular to a telescopic anti-bending corrugated pipe structure.
Background
At present, the corrugated pipe is generally used in a vacuum pipeline of a crystal growth furnace, the corrugated pipe in the prior art is mainly a cylindrical corrugated pipe with openings at two ends, and because the traditional small-diameter corrugated pipe has low rigidity (especially a slender corrugated pipe), has a large axial elastic coefficient, is easy to bend when in use and is easy to vibrate. Bending and vibration are greater when used between two joints where there is relative motion. The pressure drop change in the vacuum pipeline is large due to the bending and the vibration of the corrugated pipe, and certain influence is generated on the yield of the grown crystal. Especially when used between moving parts, the bending degree and the bending position are greatly changed and uncontrollable, and the influence on pipeline pressure drop is larger.
If the rigidity of the corrugated pipe is too large, the deformation amount cannot meet the requirement required in practice, so that a metal corrugated pipe capable of realizing large expansion and contraction is urgently needed.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned technical deficiencies, it is an object of the present invention to provide a bellows structure with a flexible and bending-resistant structure, which solves the problems mentioned in the background art.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the utility model provides a telescopic anti-bending corrugated pipe structure which comprises a corrugated pipe combined pipeline and a combined guide cylinder, wherein the corrugated pipe combined pipeline is sleeved in the combined guide cylinder;
the corrugated pipe combined pipeline comprises a plurality of corrugated pipes and an inner sleeve, and the nominal diameter of the plurality of corrugated pipes is gradually reduced from top to bottom;
an inner sleeve is sleeved in the corrugated pipe at the lowermost end, the inner sleeve penetrates through the bottom of the corrugated pipe at the lowermost end, and the inner sleeve penetrates out of the top of the corrugated pipe at the lowermost end;
the number of the guide cylinders of the combined guide cylinder is one less than that of the corrugated pipes, and the diameter of the combined guide cylinder is gradually reduced from top to bottom.
Preferably, the axial elastic coefficients of the bellows are different, and the product of the axial elastic coefficient of each bellows and the maximum expansion and contraction amount thereof should be equal, that is:
k1×L1＝k2×L2＝k3×L3＝k4×L4＝……＝kn×Ln；
in the formula: k1, k2, k3 and k4 … … kn are axial elastic coefficients of a first corrugated pipe, a second corrugated pipe, a third corrugated pipe and a fourth corrugated pipe … …, and L1, L2, L3 and L4 … … Ln are maximum designed expansion and contraction amounts of the first corrugated pipe, the second corrugated pipe, the third corrugated pipe and the fourth corrugated pipe … …; the maximum design expansion amounts L1, L2, L3 and L4 … … Ln are all in the elastic deformation range of the corresponding corrugated pipe and set margins are reserved.
Preferably, the number of the corrugated pipes is four, the corrugated pipes are respectively a first corrugated pipe, a second corrugated pipe, a third corrugated pipe and a fourth corrugated pipe, the nominal diameter of the first corrugated pipe, the second corrugated pipe, the third corrugated pipe and the fourth corrugated pipe are gradually reduced from top to bottom, and adjacent corrugated pipes are connected through flanges;
the combination guide cylinder comprises a first-stage guide cylinder, a second-stage guide cylinder and a third-stage guide cylinder, wherein the aperture of the first-stage guide cylinder is gradually reduced from top to bottom, the structure of the first-stage guide cylinder, the structure of the second-stage guide cylinder and the structure of the third-stage guide cylinder are the same, the first-stage guide cylinder is in the shape of a thin-wall hollow circular tube, a mounting flange is welded at the upper end of the first-stage guide cylinder, the first-stage guide cylinder is in threaded connection with a flange at the upper end of a corrugated tube through a mounting flange, and a retaining ring is integrally connected with the inner side circumference of the bottom of the first-stage guide cylinder.
Preferably, a first corrugated pipe is sleeved in the first-stage guide cylinder, a second corrugated pipe is sleeved in the second-stage guide cylinder, a third corrugated pipe and a fourth corrugated pipe are sleeved in the third-stage guide cylinder, the second-stage guide cylinder is in threaded connection with a flange at the upper end of the second corrugated pipe through a mounting flange through bolts, the outer diameter of the second-stage guide cylinder is smaller than the inner diameter of a baffle ring at the bottom of the first-stage guide cylinder, a flange at the top of the second-stage guide cylinder is located in the first-stage guide cylinder, so that when the corrugated pipe stretches out and draws back, the top of the second-stage guide cylinder is limited to move back and forth in the first-stage guide cylinder, a flange at the top of the third corrugated pipe is located in the second-stage guide cylinder, a flange at the top of the third corrugated pipe is connected with a flange at the top of the third-stage guide cylinder through bolts, the outer diameter of the flange at the junction of the third corrugated pipe and the fourth corrugated pipe is smaller than the inner diameter of the baffle ring at the bottom of the guide cylinder, therefore, the third corrugated pipe moves back and forth in the third-stage guide cylinder, and the fourth corrugated pipe can extend out of the third-stage guide cylinder.
Preferably, when the corrugated pipe combined pipeline is completely unfolded, the lower surface of the flange at the top of the secondary guide cylinder is attached to the upper surface of the baffle ring at the bottom of the primary guide cylinder, and the first corrugated pipe reaches the maximum design expansion amount L1; the lower surface of a flange at the top of the third-stage guide cylinder is attached to the upper surface of a baffle ring at the bottom of the second-stage guide cylinder, and the second corrugated pipe reaches the maximum design expansion amount L2; the lower end face of a flange at the lower end of the third corrugated pipe is attached to the upper surface of a baffle ring at the bottom of the third-stage guide cylinder, and the third corrugated pipe reaches the maximum design expansion amount L3; the upper end face of the flange at the lower end of the corrugated pipe III is attached to the lower end face of the stop block at the end part of the inner sleeve, and the corrugated pipe IV reaches the maximum design expansion amount L4.
Preferably, the flanges at two ends of the corrugated pipe combined pipeline are pipeline connecting flanges.
Preferably, an inner hole of the flange between the second corrugated pipe and the third corrugated pipe is of a conical structure with a wide upper part and a narrow lower part. When the dog at interior sleeve pipe top moved the conical structure of the flange hole of process, the conical structure of flange hole played the guide effect, and the dog card at top was on the flange when avoiding interior sleeve pipe motion.
Preferably, the inner diameter specifications of adjacent corrugated pipes are arranged according to the inner diameter specification of adjacent or spaced one specification, so that the arrangement of the first corrugated pipe, the second corrugated pipe, the third corrugated pipe and the fourth corrugated pipe is close to a linear state, and the pressure drop is lowest.
Preferably, the outer diameter of the first bellows is not more than 80 mm.
Preferably, the inner sleeve is in a thin-wall round tube shape, the bottom of the fourth corrugated tube is fixed to the lower portion of the inner sleeve, a flange is fixed to the bottom end of the inner sleeve, and a stop block is fixed to the outer side of the top of the inner sleeve along the circumference.
The corrugated pipe combined pipeline and the guide cylinders at all stages are connected by bolts or can be welded into a whole.
The utility model has the beneficial effects that:
(1) the utility model adopts the structure of the guide cylinder and the inner sleeve, thereby limiting the bending of the corrugated pipe in the using process and effectively controlling the vibration amplitude. The utility model fully utilizes the characteristic of larger axial elastic coefficient of the slender corrugated pipe, can axially extend and retract integrally, and is particularly suitable for the space between two joints with relative motion.
(2) The utility model adopts the layout that corrugated pipes with various specifications are arranged in sequence according to the nominal diameter. When a pressure gauge or a vacuum timer is installed on a flange at the end of the minimum nominal diameter corrugated pipe, compared with the whole minimum nominal diameter corrugated pipe, the pressure difference is smaller, the measurement value of an instrument is more accurate, and the allowable installation distance of the measurement instrument from a measurement point is longer. The bending and the vibration of the slender corrugated pipe enable the pressure difference of the pipeline in the corrugated pipe to be in uncontrollable change, thereby not only influencing the accuracy of the measured value of the vacuum degree of the pipeline, but also influencing the yield of crystal bars.
(3) The utility model adopts the design of the self-guide type corrugated pipe, and can well solve the problem of the traditional corrugated pipe, namely if the rigidity of the traditional corrugated pipe is too small, the lateral rigidity is insufficient, and the traditional corrugated pipe is easy to bend. If the rigidity is too large, the deformation amount can not meet the requirement in practice, and the utility model is original. Under the condition that the corrugated pipe does not deform laterally, the requirement of large radial deformation can be met, and the problem of insufficient lateral rigidity can be well solved. The lateral rigidity of the utility model is realized by the external combined guide cylinder, although the rigidity of the corrugated pipe is very low, the lateral deformation can not occur due to the existence of the external combined guide cylinder, and the design requirement is met.
(4) The corrugated pipe is applied to a vacuum pipeline system of a crystal growth furnace, and particularly between two movable joints.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a side view of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is a cross-sectional view of a bellows of the present invention;
FIG. 4 is a partial enlarged view of the utility model at A;
FIG. 5 is a partial enlarged view of the present invention at B;
FIG. 6 is an enlarged view of a portion of the present invention at C;
FIG. 7 is a schematic view of the bellows of the present invention in a maximum extended condition;
fig. 8 is a schematic structural view of a primary guide cylinder according to the present invention.
Description of reference numerals:
the corrugated pipe assembly comprises a 1-corrugated pipe combined pipeline, 2-a first-stage guide cylinder, 3-a second-stage guide cylinder, 4-a third-stage guide cylinder, 5-a connecting bolt, 6-a baffle ring, 11-a corrugated pipe I, 12-a corrugated pipe II, 13-a corrugated pipe III, 14-a corrugated pipe IV, 15-an inner sleeve, 16-a flange and 17-an installation flange.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Example (b):
as shown in fig. 1-8, the present invention provides a telescopic anti-bending bellows structure suitable for a bellows having an outer diameter of not more than 80 mm. The corrugated pipe combined guide cylinder comprises a corrugated pipe combined pipeline 1, a combined guide cylinder and a connecting bolt 5, wherein the corrugated pipe combined pipeline 1 is sleeved in the combined guide cylinder through a flange 16 and the bolt 5.
The corrugated pipe combined pipeline 1 comprises a plurality of corrugated pipes, which may be 2-10, as shown in fig. 2 and fig. 3, and preferably, the number of the corrugated pipes in the corrugated pipe combined pipeline 1 is four, and the corrugated pipes are respectively a first corrugated pipe 11, a second corrugated pipe 12, a third corrugated pipe 13 and a fourth corrugated pipe 14, which are gradually reduced in nominal diameter from top to bottom, adjacent corrugated pipes are connected by the flange 16, and the axial elastic coefficients of the first corrugated pipe 11, the second corrugated pipe 12, the third corrugated pipe 13 and the fourth corrugated pipe 14 are different. In order to make the bellows combination pipeline 1 reach the maximum expansion amount, each specification bellows also reaches the respective maximum design expansion amount, and the product of the elastic coefficient of each bellows and the maximum expansion amount thereof should be equal, that is:
k1×L1＝k2×L2＝k3×L3＝k4×L4。
in the formula: k1 is the axial elastic coefficient of the first bellows 11, and L1 is the maximum designed expansion and contraction amount of the first bellows 11; k2 is the axial elastic coefficient of the second corrugated pipe 12, and L2 is the maximum designed expansion and contraction amount of the second corrugated pipe 12; k3 is the axial elastic coefficient of the third bellows 13, and L3 is the maximum designed expansion and contraction amount of the third bellows 13; k4 is the axial spring rate of bellows four 14, and L4 is the maximum design expansion of bellows four 14. The maximum design expansion amounts L1, L2, L3 and L4 are all in the elastic deformation range of the corresponding corrugated pipe and set margins are reserved, so that the corrugated pipe is prevented from being incapable of recovering or being damaged. . The user selects a proper margin according to actual requirements, wherein the margin is set to be 10-30% of the maximum elastic deformation of the corrugated pipe, for example, the elastic deformation range of the first corrugated pipe 11 is 0-100cm, the L1 value is 80cm, and the margin is 20 cm.
In the attached drawing 3, an inner sleeve 15 is sleeved in the fourth bellows 14, the inner sleeve 15 is in a thin-wall circular tube shape, and the outer diameter of the inner sleeve 15 is equal to the inner diameter of the fourth bellows 14, so that the inner sleeve 15 is just sleeved in the fourth bellows 14 to prevent the fourth bellows 14 from bending. The embodiment of the inner sleeve 15 and the four corrugated pipes 14 is shown in an enlarged view in fig. 4, the inner sleeve 15 penetrates from the bottom of the four corrugated pipes 14, the inner sleeve 15 penetrates from the top of the four corrugated pipes 14, when the corrugated pipes are stretched to the longest state, as shown in fig. 2, the top end of the inner sleeve 15 extends into the two corrugated pipes 12, the inner sleeve 15 moves by a distance of L4, the bottom of the four corrugated pipes 14 is welded at the lower part of the inner sleeve 15, a flange 16 is welded at the bottom end of the inner sleeve 15, and when the four corrugated pipes 14 stretch, the inner sleeve 15 moves together. As shown in fig. 6, a stopper 17 is welded to the top outer side of the inner tube 15 along the circumference, and the stopper 17 is used to control the maximum design expansion and contraction amount L4 of the bellows four 14.
Further, as shown in the enlarged view of fig. 5, the inner hole of the flange 16 between the second bellows 12 and the third bellows 13 is in a conical structure with a wide top and a narrow bottom, and when the stopper 14 at the top of the inner sleeve 15 moves through the conical structure of the inner hole of the flange 16, the conical structure of the inner hole of the flange 16 plays a guiding role, so that the stopper 14 at the top is prevented from being clamped on the flange 16 when the inner sleeve 15 moves.
Further, the inner diameter specifications of the first bellows 11, the second bellows 12, the third bellows 13 and the fourth bellows 14 are arranged according to adjacent or spaced inner diameter specifications, so that the first bellows 11, the second bellows 12, the third bellows 13 and the fourth bellows 14 are arranged close to a straight line state, and the pressure drop is lowest.
Fig. 4 is a structure diagram of a guide cylinder, the number of guide cylinders of the combined guide cylinder is one less than that of the corrugated pipe, in this embodiment, the combined guide cylinder includes a first-stage guide cylinder 2, a second-stage guide cylinder 3 and a third-stage guide cylinder 4, the diameters of the first-stage guide cylinder 2, the second-stage guide cylinder 3 and the third-stage guide cylinder 4 are gradually reduced from top to bottom, the structures of the first-stage guide cylinder 2 are only described herein, the first-stage guide cylinder 2 is in a thin-wall hollow circular tube shape, a mounting flange 17 is welded at the upper end of the first-stage guide cylinder 2, the first-stage guide cylinder 2 is in threaded connection with a flange 16 at the upper end of a first corrugated pipe 11 through a bolt 5 through the mounting flange 17, a retaining ring 6 is integrally connected to the inner side circumference of the bottom of the first-stage guide cylinder 2, and the first-stage guide cylinder 2 is used for limiting the bending of the first corrugated pipe 11 on the corrugated pipe combined pipeline 1, the first corrugated pipe 11 also plays a role in guiding when being stretched; the baffle ring 6 is used for limiting the maximum elongation of the first corrugated pipe 11 and preventing damage caused by large deformation of the first corrugated pipe 11.
The corrugated pipe I11 is sleeved in the first-stage guide cylinder 2, the corrugated pipe II 12 is sleeved in the second-stage guide cylinder 3, the corrugated pipe III 13 and the corrugated pipe IV 14 are sleeved in the third-stage guide cylinder 4, the second-stage guide cylinder 3 is in threaded connection with a flange 16 at the upper end of the corrugated pipe II 12 through a mounting flange 17 through a bolt 5, the outer diameter of the second-stage guide cylinder 3 is smaller than the inner diameter of a baffle ring 6 at the bottom of the first-stage guide cylinder 2, and the flange 16 at the top of the second-stage guide cylinder 3 is located in the first-stage guide cylinder 2, so that when the corrugated pipe is stretched, the top of the second-stage guide cylinder 3 is limited to move back and forth in the first-stage guide cylinder 2, namely the corrugated pipe I11 cannot exceed the first-stage guide cylinder 2 in the maximum stretching state, the flange 16 at the top of the corrugated pipe III 13 is located in the second-stage guide cylinder 3, and the flange 16 at the top of the corrugated pipe III 13 is connected with the flange 16 at the top of the third-stage guide cylinder 4 through a bolt, the outer diameter of a flange 16 at the joint of the third corrugated pipe 13 and the fourth corrugated pipe 14 is smaller than the inner diameter of the third-stage guide cylinder 4, and the outer diameter of the flange 16 at the bottom of the fourth corrugated pipe 14 is larger than the inner diameter of a baffle ring 6 at the bottom of the third-stage guide cylinder 4, so that the third corrugated pipe 13 moves back and forth in the third-stage guide cylinder 4, and the fourth corrugated pipe 14 can extend out of the third-stage guide cylinder 4.
The flange 16 at the top of the second-stage guide cylinder 3 is located on the first-stage guide cylinder 2, so that when the corrugated pipe stretches out and draws back, the top of the second-stage guide cylinder 3 is limited to move back and forth in the first-stage guide cylinder 2, and similarly, the flange 16 at the top of the third-stage guide cylinder 4 is limited to move back and forth in the second-stage guide cylinder 3, so that the fourth corrugated pipe 14 can partially move back and forth in the third-stage guide cylinder 4.
Fig. 7 is a fully expanded state diagram of the bellows combined pipeline 1 of the present invention, at this time, the lower surface of the flange 16 at the top of the secondary guide cylinder 3 is attached to the upper surface of the baffle ring 6 at the bottom of the primary guide cylinder 2, and the bellows one 11 reaches the maximum designed expansion amount L1; the lower surface of a flange 16 at the top of the third-stage guide cylinder 4 is attached to the upper surface of a baffle ring 6 at the bottom of the second-stage guide cylinder 3, and the bellows II 12 reaches the maximum design expansion amount L2; the lower end face of a flange 16 at the lower end of the third corrugated pipe 13 is attached to the upper surface of a baffle ring 6 at the bottom of the third-stage guide cylinder 4, and the third corrugated pipe 13 reaches the maximum design expansion amount L3; the upper end surface of a flange 16 at the lower end of the corrugated pipe three 13 is attached to the lower end surface of a stop 17 at the end part of the inner sleeve 15, and the corrugated pipe four 14 reaches the maximum design expansion amount L4.
The number of the corrugated pipes is 4, and the number of the corrugated pipes is not limited to 4 in practical application and can be more or less.
The corrugated pipe combined pipeline 1 and each stage of guide cylinders are connected by bolts or welded into a whole.
The flanges 16 at the two ends of the corrugated pipe combined pipeline 1 are pipeline connecting flanges.
The working principle is as follows:
the corrugated pipe structure is used in a vacuum pipeline system, particularly between two movable joints, for example, one end of the corrugated pipe is connected to a lifting head in a crystal growth furnace through a flange, the other end of the corrugated pipe is connected to a component or a vacuum cavity at the other end of a lifting rope through a flange, and the vacuum cavity can move up and down through the guiding of the corrugated pipe with a guiding function by the lifting head. The bellows serves here as a part which can be extended up and down to provide a vacuum channel for the connected lower chamber part. Meanwhile, the external guide combined guide cylinder increases the radial rigidity, so that the corrugated pipe has large deformation, and cannot generate radial deformation to influence the service life of the corrugated pipe. The first corrugated pipe, the second corrugated pipe and the third corrugated pipe are guided by the combined guide cylinder and increase the radial rigidity, and the fourth corrugated pipe positioned at the lowermost end is guided by the inner sleeve and increase the radial rigidity.
The utility model adopts the design of the self-guide type corrugated pipe, and can well solve the problem of the traditional corrugated pipe, namely if the rigidity of the traditional corrugated pipe is too small, the lateral rigidity is insufficient, and the traditional corrugated pipe is easy to bend. If the rigidity is too large, the deformation amount can not meet the requirement in practice, and the utility model is original.
Under the condition that the corrugated pipe does not deform laterally, the requirement of large radial deformation can be met, and the problem of insufficient lateral rigidity can be well solved. The lateral rigidity of the utility model is realized by the external combined guide cylinder, although the rigidity of the corrugated pipe is very low, the lateral deformation can not occur due to the existence of the external combined guide cylinder, and the design requirement is met.
In the prior art, conical corrugated pipes, such as the reducing corrugated pipe disclosed in CN 106090453B, have appeared, and the corrugated pipe structure of the present invention is different from the conical corrugated pipe in that:
1. the corrugated pipe adopts a small-diameter sectional cylindrical surface corrugated pipe, the small-diameter cylindrical surface corrugated pipe has good tensile property, and the conical corrugated pipe has poor tensile property.
2. When the two small-diameter ends with the same size are adopted, the overall length of the corrugated pipe is larger and the diameter of the large end of the conical corrugated pipe is also larger because the conical corrugated pipe is conical. When the diameter of the section of the corrugated pipe is larger than 100mm, the tensile property of the corrugated pipe is poorer and poorer along with the larger diameter until the corrugated pipe cannot be stretched.
3. When the connecting flanges at the two ends are the same, the length of the corrugated pipe is not limited by the sizes of the connecting flanges at the two ends. The length of the conical corrugated pipe is limited by the size of the connecting flanges at two ends due to the conical shape. Meanwhile, the conical corrugated pipe needs to be subjected to die sinking and custom-made, and the cost is much higher than that of the corrugated pipe disclosed by the utility model.
5. The corrugated pipe of this patent adopts the combination pipeline and sets up combination guide cylinder structure in its outside and can restrict the corrugated pipe crooked, keeps linear state. The conical corrugated pipe is easy to bend as the common cylindrical corrugated pipe when in use.
6. The corrugated pipe adopts a segmented structure, and has the effect close to that of a conical corrugated pipe in the aspect of pipeline pressure drop.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the utility model. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A telescopic anti-bending corrugated pipe structure is characterized by comprising a corrugated pipe combined pipeline and a combined guide cylinder, wherein the corrugated pipe combined pipeline is sleeved in the combined guide cylinder;
the corrugated pipe combined pipeline comprises a plurality of corrugated pipes and an inner sleeve, and the nominal diameter of the plurality of corrugated pipes is gradually reduced from top to bottom;
an inner sleeve is sleeved in the corrugated pipe at the lowermost end, the inner sleeve penetrates through the bottom of the corrugated pipe at the lowermost end, and the inner sleeve penetrates out of the top of the corrugated pipe at the lowermost end;
the number of the guide cylinders of the combined guide cylinder is one less than that of the corrugated pipes, and the diameter of the combined guide cylinder is gradually reduced from top to bottom.
2. A bellows structure according to claim 1, wherein the bellows have different axial spring rates, and wherein the product of the axial spring rate and the maximum amount of expansion is equal to each other, namely:
k1×L1＝k2×L2＝k3×L3＝k4×L4＝……＝kn×Ln；
in the formula: k1, k2, k3 and k4 … … kn are axial elastic coefficients of a first corrugated pipe, a second corrugated pipe, a third corrugated pipe and a fourth corrugated pipe … …, and L1, L2, L3 and L4 … … Ln are maximum designed expansion and contraction amounts of the first corrugated pipe, the second corrugated pipe, the third corrugated pipe and the fourth corrugated pipe … …; the maximum design expansion amounts L1, L2, L3 and L4 … … Ln are all in the elastic deformation range of the corresponding corrugated pipe and set margins are reserved.
3. The structure of claim 2, wherein the number of the bellows is four, and the four bellows are respectively a first bellows, a second bellows, a third bellows and a fourth bellows, the nominal diameter of which is gradually reduced from top to bottom, and adjacent bellows are connected by a flange;
the combination guide cylinder comprises a first-stage guide cylinder, a second-stage guide cylinder and a third-stage guide cylinder, wherein the aperture of the first-stage guide cylinder is gradually reduced from top to bottom, the structure of the first-stage guide cylinder, the structure of the second-stage guide cylinder and the structure of the third-stage guide cylinder are the same, the first-stage guide cylinder is in the shape of a thin-wall hollow circular tube, a mounting flange is welded at the upper end of the first-stage guide cylinder, the first-stage guide cylinder is in threaded connection with a flange at the upper end of a corrugated tube through a mounting flange, and a retaining ring is integrally connected with the inner side circumference of the bottom of the first-stage guide cylinder.
4. The retractable and anti-bending corrugated pipe structure as claimed in claim 3, wherein the first corrugated pipe is sleeved in the first primary guide cylinder, the second corrugated pipe is sleeved in the second secondary guide cylinder, the third corrugated pipe and the fourth corrugated pipe are sleeved in the third primary guide cylinder, the second primary guide cylinder is in threaded connection with a flange at the upper end of the second corrugated pipe through a mounting flange by bolts, the outer diameter of the second primary guide cylinder is smaller than the inner diameter of the baffle ring at the bottom of the first primary guide cylinder, the flange at the top of the second primary guide cylinder is located in the first primary guide cylinder, so that when the corrugated pipe is retracted, the top of the second primary guide cylinder is limited to move back and forth in the first primary guide cylinder, the flange at the top of the third corrugated pipe is located in the second primary guide cylinder, the flange at the top of the third corrugated pipe is connected with the flange at the top of the third primary guide cylinder by bolts, and the outer diameter of the flange at the junction of the third and fourth corrugated pipes is smaller than the inner diameter of the third primary guide cylinder, the outer diameter of the flange at the joint of the third corrugated pipe and the fourth corrugated pipe is larger than the inner diameter of the baffle ring at the bottom of the third-stage guide cylinder, so that the third corrugated pipe moves back and forth in the third-stage guide cylinder, and the fourth corrugated pipe can extend out of the third-stage guide cylinder.
5. The retractable and anti-bending corrugated pipe structure as claimed in claim 4, wherein when the corrugated pipe combined pipeline is fully unfolded, the lower surface of the flange at the top of the secondary guide cylinder is attached to the upper surface of the baffle ring at the bottom of the primary guide cylinder, and once the corrugated pipe reaches the maximum design extension amount L1; the lower surface of a flange at the top of the third-stage guide cylinder is attached to the upper surface of a baffle ring at the bottom of the second-stage guide cylinder, and the second corrugated pipe reaches the maximum design expansion amount L2; the lower end face of a flange at the lower end of the third corrugated pipe is attached to the upper surface of a baffle ring at the bottom of the third-stage guide cylinder, and the third corrugated pipe reaches the maximum design expansion amount L3; the upper end face of the flange at the lower end of the corrugated pipe III is attached to the lower end face of the stop block at the end part of the inner sleeve, and the corrugated pipe IV reaches the maximum design expansion amount L4.
6. A bellows structure of claim 3, wherein the flanges at the two ends of the bellows assembly are pipe connection flanges.
7. A bellows structure of telescopic anti-bending bellows as claimed in claim 3, wherein the inner hole of the flange between the second bellows and the third bellows is a conical structure with a wide top and a narrow bottom.
8. A bellows structure according to claim 3, wherein the inner diameter of adjacent bellows are arranged adjacent to or spaced apart by a gauge inner diameter.
9. A collapsible bend-resistant bellows structure as claimed in any one of claims 2 to 8 wherein the outer diameter of the bellows is no greater than 80 mm.
10. The telescopic bending-resistant corrugated pipe structure as claimed in claim 3, wherein the inner sleeve is in a thin-walled circular pipe shape, the bottom of the corrugated pipe four is fixed at the lower part of the inner sleeve, a flange is fixed at the bottom end of the inner sleeve, and a stop block is fixed at the outer side of the top of the inner sleeve along the circumference.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122529483.2U CN216192870U (en) | 2021-10-21 | 2021-10-21 | Telescopic anti-bending corrugated pipe structure |
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| CN202122529483.2U CN216192870U (en) | 2021-10-21 | 2021-10-21 | Telescopic anti-bending corrugated pipe structure |
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