CN114754204A

CN114754204A - Outer anti-disengaging structure of tubular product and tubular product spare

Info

Publication number: CN114754204A
Application number: CN202210210752.5A
Authority: CN
Inventors: 廖丽红
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-03-04
Filing date: 2022-03-04
Publication date: 2022-07-15

Abstract

The invention relates to an outer anti-falling structure of a pipe and a pipe. The anti-dropping socket comprises a socket section, a socket section and an anti-dropping piece, wherein a concave part which is concave towards the direction close to the axis is arranged on the peripheral surface of the socket section or the peripheral surface of the socket section; the anti-falling part comprises a fixed head, a hook head protruding towards the direction close to the axis and a linking part fixedly connected between the fixed head and the hook head, wherein the fixed head is detachably connected to one of the peripheral surface of the socket section and can move along with the socket section or the socket section where the fixed head is located; the linking part is avoided outside the socket section, at least one section of elastic part capable of changing in radial elasticity is arranged on the linking part, a convex part positioned between the port and the concave part is arranged on the outer surface of the socket section or the socket section where the concave part is positioned, and the distance from the top end of the convex part to the central axis is greater than the distance from the free end of the hook head to the central axis of the hook head. The invention can solve the problems that the pipe splicing can not be accurately positioned and the anti-falling part is complicated to replace.

Description

Outer anti-disengaging structure of tubular product and tubular product spare

Technical Field

The invention relates to the field of pipes, in particular to an external pipe anti-falling structure and a pipe piece.

Background

The corrugated pipe has the advantages of good pressure resistance, low construction cost, light weight, quick and convenient construction and the like, and is widely applied to the field of drainage. For convenient transportation, the length of each section of corrugated pipe cannot be too long, and the sections of corrugated pipe are transported to a construction site and then connected. The connection mode of the existing corrugated pipe is generally plug-in type or flange connection type. The traditional pipe connection mode can not resist axial tension, and has more parts, troublesome installation and high construction cost.

In addition, chinese utility model patent with application number CN201921861728.8 discloses a tubular product subassembly with anticreep seal structure to overcome above-mentioned shortcoming, including socket, bellmouth and the anticreep piece that prevents to kick-back, wherein anticreep is interior anticreep mode, and the elasticity anticreep body joint of anticreep piece is in the recess of the internal perisporium of bellmouth promptly, in order to prevent axial resilience, and this kind of interior anticreep mounting structure has following shortcoming: firstly, the pipe splicing process is internally installed, and cannot be accurately positioned and observed by naked eyes, so that the pipe is easily damaged due to the fact that the pipe is too violent to exert force. And secondly, when the anti-drop part is damaged or needs to be replaced due to other reasons, the operation is complex, the socket section needs to be pulled out forcibly relative to the socket section, and the anti-drop part is easy to damage.

Disclosure of Invention

The invention aims to: overcome above shortcoming and provide an anti-disengaging structure outside tubular product for solve the unable accurate positioning of tubular product concatenation and anticreep spare and change loaded down with trivial details problem.

The invention is realized by the following technical scheme: the utility model provides an outer anti-disengaging structure of tubular product which characterized in that: the socket comprises a socket section, a socket section and an anti-falling part, wherein the socket section is used for socket the socket section, and a sunken part sunken towards the direction close to the axis is arranged on the peripheral surface of the socket section or the peripheral surface of the socket section;

the anti-falling part comprises a fixing head, a hook head protruding towards the direction close to the axis, and a joint part fixedly connected between the fixing head and the hook head, wherein the fixing head is detachably connected to one of the outer peripheral surface of the socket section and can move along with the socket section or the socket section where the fixing head is located;

the linking part is avoided outside the bell mouth section, at least one section of elastic part capable of changing in radial elasticity is arranged on the linking part, a protruding part located between a port and the recessed part is arranged on the outer surface of the bell mouth section or the socket section where the recessed part is located, the distance from the top end of the protruding part to the central axis is larger than the distance from the free end of the hook head to the central axis of the hook head, when the anti-falling part and the protruding part move in the opposite direction, the protruding part pushes the hook head and enables the linking part to be propped open by elasticity at the elastic part, and the linking part automatically resets after being released and drives the hook head to be clamped into the recessed part.

Further, the outer surface of the boss is provided with an inclined surface, and the inclined surface inclines outwards from the port position of the socket section or the socket section.

Further, the inner wall of the connecting part is elastically buckled and pressed on the convex part.

Furthermore, at least one section of the hook head has elasticity.

Further, the included angle gamma between the inner wall of the hook head and the inner wall of the connecting part is smaller than 90 degrees.

Furthermore, a side of the hook head away from the fixed head is provided with a blocking part protruding towards the direction close to the axis, the blocking part is fixedly arranged with the linking part, and a deformation space is reserved between the blocking part and the hook head.

Further, the linking part is bent, and an included angle theta of the inner wall of the bent part is as follows: theta is more than 90 degrees and less than 180 degrees.

Furthermore, at least one corrugated section which is concave-convex alternated along the axial direction and is used for playing a role in stretching and buffering is arranged in the socket section.

Further, a sealing ring is arranged between the socket section and the socket section.

Further, the fixed head is of a circular ring structure, the circular ring structure is formed by combining more than two arc-shaped components, and every two adjacent arc-shaped components are connected through a bolt.

Furthermore, the hook head and the joint part form a hook body part, and the hook body parts are arranged on the fixing head at intervals along the circumferential direction.

Because the anticreep piece comprises fixed head, joint portion and gib head, fixed head demountable installation is in one of socket section surface and bellmouth section surface, and the mounted position of anticreep piece exposes externally, and anticreep piece changes easy operation. The hook body component with elasticity is formed by the connecting part and the hook head, when the socket section and the socket section move oppositely, the hook body component can be unfolded by the protruding part on the socket section or the socket section, the hook head is clamped into the recessed part after the socket section or the socket section is installed in place, and the recessed part and the hook head corresponding to the recessed part are located outside, so that the installation and the positioning are accurate, the pipe cannot be damaged easily by naked eyes.

Drawings

FIG. 1 is a schematic three-dimensional structure of the first embodiment;

FIG. 2 is an assembled view of the first embodiment;

FIG. 3 is a diagram illustrating a first combination state according to a first embodiment;

FIG. 4 is a schematic overall structure diagram of the first embodiment;

FIG. 5 is a partial structure diagram of an assembled state of the embodiment;

FIG. 6 is a first schematic structural view of a first anti-slip member according to an embodiment;

FIG. 7 is a second schematic view of the anti-slip member according to the first embodiment;

FIG. 8 is a third schematic structural view of the detachment prevention member in the first embodiment;

FIG. 9 is a fourth schematic structural view of the detachment prevention member in the first embodiment;

FIG. 10 is a fifth schematic structural view of the detachment prevention member in the first embodiment;

FIG. 11 is a diagram illustrating a second combination state according to the first embodiment;

FIG. 12 is a schematic overall structure diagram of the first embodiment;

FIG. 13 is a third exemplary embodiment of a combination state;

FIG. 14 is a schematic structural view of the second embodiment;

FIG. 15 is a diagram illustrating a first combination state according to the second embodiment;

FIG. 16 is a schematic overall structure diagram of the second embodiment;

FIG. 17 is a first view showing the structure of the detachment prevention member according to the second embodiment;

FIG. 18 is a second schematic structural view of the detachment prevention member in the second embodiment;

FIG. 19 is a first schematic structural view of the detachment prevention member in a normal mounting state according to the second embodiment;

FIG. 20 is a schematic view of a stretched anti-separation member according to a second embodiment;

FIG. 21 is a second structural view of the detachment prevention member in a normal mounting state in the second embodiment;

FIG. 22 is a second schematic structural view illustrating the retaining member in a stretched state according to the second embodiment;

FIG. 23 is a diagram illustrating a second embodiment in an assembled state;

FIG. 24 is a second embodiment of the present invention;

fig. 25 is a diagram illustrating a combination state of the second embodiment.

Description of reference numerals: 1-socket section, 11-concave part, 12-convex part, 121-inclined plane, 13-mounting groove, 2-socket section, 21-concave part, 22-convex part, 221-inclined plane, 23-mounting groove, 24-corrugated section, 3-anti-release part, 31-fixed head, 32-hook head, 33-linking part, 34-blocking part, 341-inner side wall, 342-outer side wall, 35-bending part, 36-annular part, 4-sealing ring, 5-pipe body and 6-linking section.

Detailed Description

The invention is described in detail below with reference to the following description of the drawings:

the first embodiment is as follows:

the embodiment relates to an outer anti-disengaging structure of a pipe, which is used for connecting two pipes, and comprises a socket section 1, a socket section 2 and an anti-disengaging part 3, wherein the socket section 1 and the socket section 2 are respectively one part of the two pipes, the inner diameter of the socket section 2 is larger than the outer diameter of the socket section 1, and the socket section 1 is inserted into the socket section 2 in the splicing process of the two pipes, as shown in figures 1 to 3.

The radial cross-sections of the socket section 1 and the socket section 2 can be made into various shapes, such as a circle, a quadrangle, a pentagon, and the like, and preferably, as shown in fig. 1, the socket section 1 and the socket section 2 are both circular.

The anticreep piece 3 is used for connecting inside and outside adjacent socket section 1 and bellmouth section 2 to prevent that the two from breaking away from each other, anticreep piece 3 comprises fixed head 31, gib head 32 and linking portion 33, and wherein linking portion 33 connects between fixed head 31 and gib head 32, fixed head 31 is the stiff end, anticreep piece 3 passes through fixed head 31 releasable connection on socket section 1, and when socket section 1 removes the in-process relatively to bellmouth section 2, anticreep piece 3 moves with socket section 1 together.

The connection portion 33 is avoided outside the socket section 2, that is, the connection portion 33 can be exposed outside the socket section 2, and at least one portion of the connection portion 33 is an elastic portion, so that the connection portion 33 can be elastically deformed in the radial direction at the elastic portion, and as a preferable mode, the elastic portion is located at a connection position of the connection portion 33 and the fixing head 31. In another preferred embodiment, the engagement portions 33 are elastic. In another preferred embodiment, as shown in fig. 9, the connecting portion 33 is provided with a bent portion 35 bent outward from an inner wall, and the elastic portion is located at a connecting position of the connecting portion 33 and the bent portion 35.

The socket section 2 is provided with a recess 21 recessed toward the direction close to the axis thereof on the outer surface thereof, wherein the recess 21 is used for engaging the hook 32 of the separation preventing member 3, the socket section 2 is provided with a protrusion 22 protruding outward between the recess 21 and the end position of the socket section 2, wherein the recess 21 and the protrusion 22 are opposed, and the protrusion 22 is formed naturally when the recess 21 is formed, or the recess 21 is formed naturally when the protrusion 22 is provided, wherein the distance of the top of the protrusion 22 from the central axis thereof is larger than the distance from the bottom of the free end of the hook 32 to the central axis thereof, and when the socket section 1 and the socket section 2 are moved toward each other as the socket section 2 is fixed, and the protrusion 22 pushes the hook 32 outward during the insertion of the socket section 1 into the socket section 2, the hook transmits a force to the engagement 33 to cause the engagement 33 to be elastically deformed outward, and when the position of the hook reaches the recess 21 beyond the position of the protrusion 22, the joint part 33 is elastically reset to drive the hook head 32 to be clamped into the concave part 21, and the joint part 33 wraps the convex part 22 to form positioning and anti-falling.

Because anticreep piece 3's mounted position is to show outside socket section 2, easy operation when anticreep piece 3 changes to depressed part 21 is located socket section 2's surface, and the connection process of gib head 32 and depressed part 21, the naked eye can be observed, and the installation location is more accurate.

As a further improvement, as shown in fig. 5, the outer surface of the boss 22 is provided with a slope 221 inclined outward from the port position, and the slope 221 can function as a guide to facilitate the advance of the escape prevention member 3. In order to accommodate the sloped arrangement of the projection 22, the engagement portion 33 is preferably a sloped shank corresponding to the sloped surface 221.

As a further improvement, as shown in fig. 5 and 9, the engaging portion 33 is continuously elastically buckled on the slope 221 of the protruding portion 22. Because the connecting part 33 is continuously and elastically buckled and pressed on the convex part 22, a pressing pressure is applied to the convex part 22, so that the stability of the whole outer anti-falling structure after installation is better. Compared with rigid buckling, the elastic buckling is flexible connection, and the anti-falling part is not easy to be broken by force after installation.

The specific manner of elastically buckling the engaging portion 33 may be various, and preferably, as shown in fig. 5, an included angle α between an inner wall of the inclined handle (i.e., the engaging portion 33) and a horizontal line is smaller than an included angle β between the inclined surface 221 of the protruding portion 22 and the horizontal line, and the elastic portion is located at a connecting position of the engaging portion 33 and the fixing head 31, as shown in fig. 2, that is, a maximum inner diameter D1 of the inner wall of the engaging portion 33 is smaller than a maximum outer diameter D2 of the protruding portion 22.

In order to form a multi-point anti-slip function, as shown in fig. 1-2, the number of the engagement parts 33 and the hook heads 32 on the anti-slip part 3 is two or more and is distributed at intervals along the circumferential direction, preferably evenly and equally. Correspondingly, in order to adapt to the arrangement of the anti-release part 3, the concave part 21 on the socket section 2 is an annular groove or an arc-shaped groove arranged at intervals, and the convex part 22 is an annular convex or an arc-shaped convex arranged at intervals. When the number of the joint parts 33 and the hook heads 32 is multiple, the hook heads 32 form multi-point clamping, the joint parts 33 form multi-point clamping in the circumferential direction, and the wrapping performance is better. When the concave part 21 is an arc-shaped groove and/or the convex part 22 is an arc-shaped protrusion, the anti-falling part 3 is installed in place, and the socket section 1 and the socket section 2 cannot rotate around the axis.

The fixing head 31 may be installed in various ways, and as a preferred way, as shown in fig. 6, the fixing head 31 is a circular ring structure, the circular ring structure is formed by combining more than two arc-shaped components, two adjacent arc-shaped components are connected by bolts, and the circular ring structure is installed in an annular installation groove 13 of the socket section 1.

In another preferred mode, as shown in fig. 7, the fixing head 31 has a C-shaped structure, the angle of the C-shaped structure is greater than 180 °, and the fixing head is installed into an annular installation groove 13 of the socket section 1 through the gap position of the C-shaped structure.

Alternatively, as shown in fig. 8, the fixing heads 31 are of a single structure, and the fixing heads 31 are connected in series by a ring member 36, which is installed in an annular installation groove 13 of the socket section 1, wherein the ring member 36 may be a hoop, a tie or others.

As a further improvement, as shown in fig. 10, at least one part of the hook head 32 has elasticity, so that the hook head 32 can swing left and right at the elastic part under the action of external force, so that the pipe has the advantage of flexible connection after being endowed with the anti-dropping function under the action of external force factors such as geological settlement or thermal expansion and cold contraction. Preferably, the elastic position of the hook head 32 is located at the connection position of the hook head 32 and the engagement part 33 or the entire hook head has elasticity.

Further, as shown in fig. 10, in order to reserve a larger swing range, an included angle γ between an inner wall of the hook head 32 and an inner wall of the engagement portion 33 is smaller than 90 °;

further, as shown in fig. 10, a blocking portion 34 protruding toward the axial direction is provided on a side of the hook head 32 away from the fixing head 31, the blocking portion 34 is fixedly provided with the engaging portion 33, and a space is reserved between the blocking portion 34 and the hook head 32. Wherein the inner sidewall 341 of the blocking portion 34 serves as a limit for preventing the hook head 32 from being snapped off. Because the pipe is pre-buried underground, the outer side wall 342 of the blocking part 34 also plays a role of blocking soil, and can block soil from entering a space between the hook head 32 and the blocking part 34, so that the hook head 32 is blocked.

As a further improvement, as shown in fig. 2-3, at least one segment of the socket segment 2 is provided with wave segments 24 which are alternately concave and convex along the axial direction, and the wave segments 24 are arranged on the side of the concave part 21 far away from the port. Like this, when pre-buried in underground tubular product takes place the geology and subsides, the ripple section plays the effect of dispersion axial tension, can protect anticreep piece 3, avoids anticreep piece 3 to be broken by the drawing.

In order to ensure the tightness between the socket section 1 and the socket section 2, a sealing ring 4 is further installed between the socket section 1 and the socket section 2 as shown in fig. 2 to 3.

The choice of the socket section 1 can be various, as a preferable mode, as shown in fig. 1-4 and 13, the socket section 1 is formed by one end of the corrugated pipe, the outer surface of the socket section is provided with a wave crest and a wave trough structure with alternate concave and convex, the sealing ring 4 can be installed in one wave trough of the corrugated pipe in the installation process, and the anti-drop piece 3 can be installed in the other wave trough of the corrugated pipe. The middle inserting section 1 can be formed by one end of a corrugated pipe, the design of the pipe can be simpler, and the pipe has good consistency. And as shown in fig. 3-4, the maximum stretched length of the expansion joint (i.e., the bellows 24) is less than the length of the seal ring 4 that is pulled out in the straight portion to ensure that the seal is maintained at maximum stretch.

In another preferred mode, as shown in fig. 11-12, the spigot section 1 is a straight circular tube structure, the peripheral surface of the spigot section 1 is flat, the spigot section 1 is provided with a mounting groove 13 for mounting the anti-release member 3, and the sealing ring 4 is mounted in a groove on the inner wall of the corrugated section 24 of the spigot section 2. Wherein the corrugated section is continuously pressed on the sealing ring after being stretched, and a sealing mode which is tighter and tighter is formed.

Example two:

this embodiment relates to an outer anti-disengaging structure of tubular product for connect two tubular products, as shown in fig. 14-16, this structure includes socket section 1, bellmouth section 2 and anticreep piece 3, socket section 1 and bellmouth section 2 are partly of two tubular products respectively, the internal diameter of bellmouth section 2 is greater than the external diameter of socket section 1, and socket section 1 inserts in the bellmouth section 2 in the concatenation process of two tubular products.

The radial cross-sections of the socket section 1 and the socket section 2 can be made into various shapes, such as a circle, a quadrangle, a pentagon, and the like, and preferably, as shown in fig. 14, the socket section 1 and the socket section 2 are both circular.

The anti-disengaging piece 3 is used for connecting the inside and outside adjacent socket section 1 and socket section 2 to prevent the two from disengaging from each other, the anti-disengaging piece 3 comprises fixed head 31, hook head 32 and linking part 33, wherein linking part 33 is connected between fixed head 31 and hook head 32, fixed head 31 is the stiff end, anti-disengaging piece 3 passes through fixed head 31 releasable connection on socket section 2.

The joint part 33 is arranged outside the socket section 2, and at least one part of the joint part 33 is an elastic part, so that the joint part 33 can be elastically deformed up and down at the elastic part, and as a preferred mode, the elastic part is positioned at the connection position of the joint part 33 and the fixing head 31. In another preferred embodiment, the engagement portions 33 are elastic.

The socket section 1 is provided at its outer surface with a recess 11 recessed toward its axial direction, wherein the recess 11 is for catching the hook head 32 of the release preventing member 3, the socket section 1 is provided with an outwardly protruding bulge 12 between the recess 11 and the port position of the socket section 2, wherein the distance of the top of the projection 12 relative to its central axis is greater than the distance of the free end of the hook head 32 to its central axis, when the socket section 1 and the socket section 2 move towards each other, if the socket section 2 is fixed, in the process of inserting the socket section 1 into the socket section 2, the projecting portion 12 pushes the hook head 32 outward, the hook head transmits the applied force to the engaging portion 33 to elastically deform the engaging portion 33 outward, when the hook head crosses the position of the convex part 12 and reaches the concave part 11, the linking part 33 is elastically reset to drive the hook head to be clamped into the concave part 11, and the linking part 33 wraps the convex part 12 to form positioning and anti-falling.

Because the mounted position of anticreep piece 3 is exposed outside socket section 2, easy operation when anticreep piece 3 changes to depressed part 11 is located socket section 2's surface, and the connection process of gib head 32 and depressed part 11, the naked eye can observe, and the installation location is more accurate.

As a further improvement, as shown in fig. 15, the outer surface of the boss 12 is provided with a slope 121 inclined outward from the port position, and the slope 121 can function as a guide to facilitate the advance of the escape prevention member 3.

In order to form a multi-point retaining structure, as shown in fig. 17, the retaining member 3 has two or more engaging portions 33 and hook heads 32 spaced apart from each other in the circumferential direction, preferably uniformly spaced apart from each other. Correspondingly, in order to adapt to the arrangement of the anti-release part 3, the concave part 11 on the socket section 1 is an annular groove or an arc-shaped groove arranged at intervals, and the convex part 12 is an annular convex or an arc-shaped convex arranged at intervals. When the number of the joint parts 33 and the hook heads 32 is multiple, the hook heads form multi-point clamping, the joint parts 33 form multi-point clamping in the circumferential direction, and the wrapping performance is better. Wherein when depressed part 11 is the arc wall and/or bellying 12 is the arc protruding, anticreep piece 3 installs the back in place, and socket section 1 and bellmouth section 2 can't rotate around the axis.

The fixing head 31 may be installed in various ways, and as a preferred way, as shown in fig. 17, the fixing head 31 is a circular ring structure, the circular ring structure is formed by combining more than two arc-shaped components, two adjacent arc-shaped components are connected by bolts, and the circular ring structure is installed in an annular installation groove 23 of the socket section 1.

In another preferred mode, as shown in fig. 18, the fixing head 31 has a C-shaped structure, the angle of the C-shaped structure is greater than 180 °, and the fixing head is installed into an annular installation groove 23 of the socket section 1 through the gap position of the C-shaped structure.

In another preferred mode, the fixing heads 31 are of a single structure, and the fixing heads 31 are connected in series through a ring-shaped member 36, and the ring-shaped member 36 is installed in an annular installation groove 23 of the socket section 1, wherein the ring-shaped member can be a hoop, a cable tie or other members.

As a further improvement, as shown in fig. 18-19, at least one part of the hook head 32 has elasticity, so that the hook head 32 can swing left and right at the elastic part under the action of external force, so that the pipe has the advantage of flexible connection after being endowed with the anti-dropping function under the action of external force factors such as geological settlement or thermal expansion and cold contraction. Preferably, the elastic position on the hook head 32 is located at the connection position of the hook head 32 and the joint part 33 or the whole hook head has elasticity.

Further, as shown in fig. 18 to 19, in order to reserve a larger swing radian space, an included angle γ between the inner wall of the hook head 32 and the inner wall of the connecting part 33 is smaller than 90 °;

further, as shown in fig. 20 to 21, a blocking portion 34 protruding toward the direction close to the axis is disposed on a side of the hook head 32 away from the fixing head 31, the blocking portion 34 is fixed to the engaging portion 33, and a space is reserved between the blocking portion 34 and the hook head 32. Wherein the inner sidewall 341 of the blocking portion 34 serves as a limit for preventing the hook head 32 from being snapped off. Because the pipe is pre-buried underground, the outer side wall 342 of the blocking part 34 plays a role of blocking soil, and the soil can be blocked from entering the space between the hook head 32 and the blocking part 34, so that the hook head 32 is blocked.

Further, as shown in fig. 1-2, the connection portion 33 is bent, and an included angle θ of the bent portion is 90 ° to 180 °. The engaging portion 33 is of a bent structure, and the elastically deformed portion is at a bent position, so that the force for pushing the engaging portion 33 by the hook head 32 needs to be greatly increased.

As a further improvement, as shown in fig. 15, at least one corrugated section 24 is arranged in the socket section 2, and the corrugated section 24 is arranged on the side of the concave part 11 far away from the port. Like this, when pre-buried in underground tubular product takes place the geology and subsides, ripple section 24 plays the effect of dispersion axial tension, can protect anticreep piece 3, avoids anticreep piece 3 to be broken by the drawing.

In order to ensure the tightness between the socket section 1 and the socket section 2, a sealing ring 4 is further installed between the socket section 1 and the socket section 2, as shown in fig. 15.

The choice of the socket section 1 can be various, and as a preferred mode, as shown in fig. 22-24, the socket section 1 is formed by one end of the corrugated pipe, the outer surface of the socket section is provided with a wave crest and a wave trough structure with alternate concave and convex, the sealing ring 4 can be installed in one wave trough of the corrugated pipe during the installation process, and the depressed part 11 is formed by the other wave trough of the corrugated pipe. The middle plug section 1 can be formed by one end of a corrugated pipe, the design of the pipe can be simpler, and the pipe has good consistency.

In another preferred mode, as shown in fig. 14-16, the socket section 1 is a straight circular tube structure, the peripheral surface of the socket section 1 is flat, the recess 11 for installing the hook head is formed on the socket section 1, and the sealing ring 4 is installed in a groove on the inner wall of the corrugated section 24 on the socket section 2. Wherein the bellows 24 is stretched and then continuously presses on the sealing ring 4, resulting in a tighter and tighter sealing.

Example three:

the present embodiment relates to a pipe fitting, as shown in fig. 4, 12, 13, 16, 23, and 24, the pipe fitting includes a pipe body 5, and a socket section 2 and/or a spigot section 1 in the pipe external anti-separation structure according to the first embodiment or the second embodiment are provided at two ends of the pipe body 5. The shape of the pipe body 5 can be various, such as a corrugated pipe, a detection well, a single-wall pipe and the like.

Preferably, as shown in fig. 4, the pipe body 5 is a corrugated pipe, a socket section 1 is formed at one end of the corrugated pipe, a socket section 2 is arranged at the other end of the corrugated pipe, the socket section 2 is connected with the corrugated pipe through a connecting section 6, and a concave portion 21 and a convex portion 22 are arranged on the socket section 2.

In another preferred mode, as shown in fig. 23, the pipe body 5 is a corrugated pipe, a socket section 1 is formed at one end of the corrugated pipe, a socket section 2 is arranged at the other end of the corrugated pipe, the socket section 2 is connected with the corrugated pipe through a connecting section 6, and an installation groove 23 for installing the fixing head 31 is arranged on the socket section 2.

In another preferred mode, as shown in fig. 12, the pipe body 5 is a corrugated pipe, one end of the corrugated pipe is provided with a socket section 1, the socket section 1 is in a circular solid-wall tubular shape, the socket section 1 is provided with a convex portion 12 and a concave portion 11, the other end of the corrugated pipe is provided with a socket section 2, the socket section 2 is connected with the corrugated pipe through a connecting section 6, and the socket section 2 is provided with a mounting groove for mounting the fixing head 31.

In another preferred mode, as shown in fig. 16, the pipe body 5 is a corrugated pipe, one end of the corrugated pipe is provided with a socket section 1, the socket section 1 is in a circular solid-wall tubular shape, the socket section 1 is provided with a mounting groove 13 for mounting a fixing head 31, the other end of the corrugated pipe is provided with a socket section 2, the socket section 2 is connected with the corrugated pipe through a connecting section 6, and the socket section 2 is provided with a protruding portion 22 and a recessed portion 21.

In another preferred mode, as shown in fig. 13 and 24, the pipe body 5 is a circular pipe, and the socket sections 2 are arranged at both ends of the circular pipe.

In another preferred mode, the pipe body 5 is a detection well, and the two ends of the detection well are both provided with the socket sections 2. As shown in fig. 13 and 24, the structure of the socket at both ends can be used with a single corrugated pipe.

While the invention has been illustrated and described with respect to specific embodiments and alternatives thereof, it will be understood that various changes and modifications can be made without departing from the spirit and scope of the invention. It is understood, therefore, that the invention is not to be in any way limited except by the appended claims and their equivalents.

Claims

1. The utility model provides an outer anti-disengaging structure of tubular product which characterized in that: the anti-dropping socket comprises a socket section (1), a socket section (2) and an anti-dropping piece (3), wherein the socket section (2) is used for socket and spigot section (1), and the peripheral surface of the socket section (2) or the peripheral surface of the socket section (1) is provided with sunken parts (21,11) which are sunken towards the direction close to the axis;

the anti-falling part (3) comprises a fixing head (31), a hook head (32) protruding towards the direction close to the axis, and a joint part (33) fixedly connected between the fixing head (31) and the hook head (32), wherein the fixing head (31) is detachably connected to one of the outer peripheral surface of the socket section (2) and the outer peripheral surface of the socket section (1) and can move along with the socket section (2) or the socket section (1) where the fixing head (31) is located;

the linking part (33) is avoided outside the socket section (2), at least one section of elastic part capable of changing in radial elasticity is arranged on the linking part (33), the convex parts (22 and 12) between the port and the concave parts (21 and 11) are arranged on the outer surface of the socket section (2) or the socket section (1) where the concave parts (21 and 11) are located, the distance from the top ends of the convex parts (22 and 12) to the central axis is larger than the distance from the free end of the hook head (32) to the central axis of the hook head, when the anti-falling part (3) and the convex parts (22 and 12) move in opposite directions, the convex parts (22 and 12) push the hook head (32) and enable the linking part (33) to be opened by elasticity, and the linking part (33) automatically resets and drives the hook head (32) to be clamped into the concave parts (21 and 11) after being released.

2. The external pipe anti-slip structure according to claim 1, wherein: the outer surface of the bulge (22) is provided with an inclined plane (221), and the inclined plane (221) inclines outwards from the port position of the socket section (1) or the socket section (2).

3. The external pipe anti-slip structure according to claim 1, wherein: the inner wall of the connecting part (33) is elastically buckled and pressed on the convex part (22).

4. The external pipe anti-slip structure according to claim 1, wherein: at least one section of the hook head (32) has elasticity.

5. The external pipe anti-slip structure according to claim 4, wherein: the included angle gamma between the inner wall of the hook head (32) and the inner wall of the connecting part (33) is smaller than 90 degrees.

6. The external pipe anti-slip structure according to claim 5, wherein: keep away from one side of fixed head (31) in gib head (32) and be equipped with to being close to protruding stopper portion (34) of axis direction, stopper portion (34) and linking portion (33) fixed the setting, it has the deformation space to reserve between stopper portion (34) and gib head (32).

7. The external pipe anti-slip structure according to claim 1, wherein: linking portion (33) do the setting of buckling, the contained angle theta of the position inner wall of buckling is: theta is more than 90 degrees and less than 180 degrees.

8. The structure of claim 1 for preventing the separation of the outside of a pipe, wherein: at least one corrugated section (24) which is alternately concave and convex along the axial direction and is used for playing a role of stretching and buffering is arranged in the socket section (2).

9. The external pipe anti-slip structure according to claim 1, wherein: and a sealing ring (4) is also arranged between the socket section (1) and the socket section (2).

10. The external pipe anti-slip structure according to claim 1, wherein: the fixing head (31) is of a circular ring structure, the circular ring structure is formed by combining more than two arc-shaped parts, and every two adjacent arc-shaped parts are connected through a bolt.