CN212509971U - Metal universal pipe - Google Patents

Abstract

The utility model discloses a metal universal pipe, which comprises an inner pipe, a corrugated pipe sleeved outside the inner pipe and connecting components arranged at the two ends of the corrugated pipe; the connecting assembly comprises an outer pressing sleeve, a sealing pressing sleeve, an inner joint, a threaded gasket and a butt nut, the outer pressing sleeve is sleeved on the part, close to the end, of the periphery of the corrugated pipe, and a first flanging is arranged on the outer end face of the outer pressing sleeve; the sealing pressure sleeve is inserted into the inner periphery of the corrugated pipe, the outer end face of the sealing pressure sleeve is provided with a second flanging, and the second flanging abuts against the outer end face of the first flanging; the inner pipe end part is inserted with an inner joint, the inner joint extends into the sealing pressing sleeve to enable the inner pipe end part, the outer end face of the inner joint extends outwards to form a third flanging, and the third flanging abuts against the outer end face of the second flanging; the butt-joint nut is sleeved on the periphery of the corrugated pipe, the inner end of the butt-joint nut is provided with a limiting ring extending inwards, the limiting ring is abutted against the inner end face of the first flanging, and the threaded gasket is arranged in the butt-joint nut. The utility model discloses not only have good leakproofness, the dismouting is very convenient moreover.

Description

Metal universal pipe

Technical Field

The utility model relates to a metal pipe fitting especially relates to a metal universal pipe.

Background

The metal universal pipe is widely applied to various industries such as military industry, petroleum, chemical industry, electric power, metallurgy, printing, papermaking, domestic heating, building and the like, and is suitable for a pipeline system which has one fixed end and the other end which needs to be moved or has two ends which need to be moved and is used for conveying fluid media. The metal universal pipe is mainly composed of three main parts, namely a corrugated pipe, an inner pipe and a connecting piece. The inner pipe is a hose and plays a flexible role; the corrugated pipe plays the roles of strengthening, shielding and guiding; the connecting piece plays a role of connection. The connecting piece generally is screw thread nipple and flange nipple, and current screw thread nipple structure is not compact, has the not enough problem of leakproofness, and flange nipple has the trouble problem of dismouting.

Therefore, there is a need for a metal gimbal to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a metal universal pipe, the utility model discloses not only have good leakproofness, the dismouting is very convenient moreover.

In order to achieve the above object, the utility model provides a following technical scheme: a metal universal pipe comprises an inner pipe, a corrugated pipe sleeved outside the inner pipe and connecting components arranged at two ends of the corrugated pipe; the connecting assembly comprises an outer pressing sleeve, a sealing pressing sleeve, an inner joint, a threaded gasket and a butt nut, the outer pressing sleeve is sleeved on the part of the periphery of the corrugated pipe close to the end part and is in interference fit with the corrugated pipe, and a first flanging extends outwards from the outer end surface of the outer pressing sleeve; the sealing pressure sleeve is inserted in a position, close to the end, of the inner periphery of the corrugated pipe and is in interference fit with the corrugated pipe, a second flanging extends outwards from the outer end face of the sealing pressure sleeve, and the second flanging abuts against the outer end face of the first flanging; the inner joint is inserted into the end part of the inner pipe, extends into the sealing pressing sleeve to enable the end part of the inner pipe to be in sealing fit with the inner wall of the sealing pressing sleeve, and extends outwards from the outer end face of the inner joint to form a third flanging which is abutted against the outer end face of the second flanging; the butt-joint nut is sleeved on the periphery of the corrugated pipe, the inner end of the butt-joint nut is provided with a limiting ring extending inwards, the limiting ring is abutted against the inner end face of the first flanging, the threaded gasket is arranged in the butt-joint nut, and the threaded gasket is abutted against the outer end face of the third flanging.

Preferably, a guide plate is arranged at a position, close to the outer end face, of the inner wall of the outer pressure sleeve, the bottom end of the guide plate is abutted to the outer end face of the corrugated pipe, the length of the bottom end of the guide plate is larger than the thickness of the corrugated pipe, and a sliding groove in sliding fit with the guide plate is axially formed in the outer side wall of the sealing pressure sleeve.

Preferably, the guide plate is in the shape of a right triangle or a right trapezoid, and the hypotenuse of the guide plate is disposed on a side facing the outer end face of the outward pressing sleeve.

Preferably, the guide plate is provided with a guide post along the axial direction, the diameter of the guide post is larger than the thickness of the guide plate, and the sliding groove is internally provided with a guide groove matched with the guide post.

Preferably, the outer wall of the sealing pressing sleeve is circumferentially provided with positioning ribs, and the inner wall of the corrugated pipe is provided with positioning grooves matched with the positioning ribs.

Preferably, the inner end surface of the sealing pressing sleeve is provided with a separation hole for cutting off the positioning rib along the axial direction.

Preferably, the inner end surface of the threaded gasket is circumferentially provided with a closed annular protrusion, and the outer end surface of the third flange is provided with an annular groove matched with the annular protrusion.

Preferably, the periphery of the inner joint is provided with an annular barb convex rib, and the barb convex rib and the inner wall of the inner pipe form extrusion fit.

Preferably, a sealing gasket is clamped between the first flanging and the limiting ring.

Preferably, the sealing pressing sleeve is made of elastic materials.

The utility model discloses a technological effect and advantage:

1. the utility model discloses an external pressure overlaps and establishes the rigidity that strengthens this department at the position that the bellows periphery is close to the tip, and sealed pressure cover inserts the leakproofness between both having played sealed pressure cover and the bellows in the bellows simultaneously, can be with providing the outside expanding extrusion stress of bellows again, makes the cooperation of bellows and external pressure cover inseparable firm more to strengthen the fixed effect of bellows tip, avoid the bellows tip to drop. The inner joint is inserted and matched with the inner pipe and then pressed into the sealing pressure sleeve, so that the end part of the inner pipe is clamped between the inner joint and the sealing pressure sleeve, the sealing performance between the inner joint and the inner pipe is ensured, and the medium is prevented from leaking from a gap between the inner joint and the inner pipe. The first flanging on the outer pressure sleeve, the second flanging on the sealing pressure sleeve and the third flanging on the inner joint are adjacent to each other and are mutually abutted to form a limiting structure, the limiting ring on the butt joint nut is abutted to the inner end face of the first flanging, the threaded gasket is abutted to the outer end face of the third flanging, when the butt joint nut is screwed with the external joint, the limiting ring on the butt joint nut pushes the end part of the universal pipe to move towards the end part of the external joint until the end part of the external joint is abutted to the threaded gasket on the outer end face of the inner joint, the butt joint nut is continuously screwed to enable the end part of the external joint to generate axial extrusion stress on the threaded gasket, and therefore the sealing performance between the threaded gasket and the inner joint and between the threaded gasket and the external joint is ensured, and the sealing performance of the universal pipe and the external joint under the condition of ensuring firm connection of the. And simultaneously, the utility model discloses simple structure need not during the dismouting with the help of other instruments, and the dismouting operation is very convenient.

2. The utility model discloses set up the deflector on external pressure cover inner wall, set up along the axial on the lateral wall of sealed pressure cover and constitute sliding fit's spout with the deflector, the deflector has played the effect of direction to sealed pressure cover to made things convenient for inserting and taking out of sealed pressure cover, simultaneously, the deflector can avoid sealed pressure cover to take place circumferential direction, improves the steadiness of sealed pressure cover installation.

3. The utility model discloses a deflector is right angled triangle or right trapezoid's shape, has further made things convenient for sealed inserting and taking out of pressing the cover.

4. The utility model discloses the design of guide pillar on the deflector and the design of the guide slot that agrees with the guide pillar mutually on the sealed cover of pressing not only play further guide effect, make things convenient for the dismouting of sealed cover of pressing, can improve the fastness of sealed cover installation of pressing moreover.

5. The utility model discloses spacing muscle on the sealed pressure cover agrees with mutually with the positioning groove of bellows inner wall to play the spacing effect of sealed pressure cover axial, strengthened the fastness of sealed pressure cover installation.

6. The utility model discloses have the separation hole that is used for cutting off the location muscle on the interior terminal surface of sealed pressure cover, insert the bellows when sealed pressure cover, the position that has the location muscle on the sealed pressure cover is because the diameter is great by the inside deformation of corrugated pipe inner wall extrusion, and the design of separation hole then provides the deformation allowance for the position that above-mentioned sealed pressure cover has the location muscle to the installation of sealed pressure cover has been made things convenient for.

7. The utility model discloses annular protrusion on the screw gasket agrees with mutually with the annular groove on the outer terminal surface of third turn-ups, can not only make the installation of screw gasket more firm, can strengthen the leakproofness between screw gasket and the third turn-ups moreover.

8. The utility model discloses the design of the protruding muscle of nipple periphery barb has strengthened the extrusion stress who acts on inner tube inner wall to the fastness of inner tube installation has been strengthened.

9. The utility model discloses press from both sides between first turn-ups and the spacing ring and be equipped with sealed the pad, during locking butt joint nut, sealed pad can provide axial elastic force for butt joint nut, and increase butt joint nut plays locking effect in the friction of external joint.

10. The utility model discloses a sealed pressure cover is the elasticity material, can produce extrusion stress and then leakproofness and the fixed effect between reinforcing and inner tube and the bellows through deformation.

Drawings

Fig. 1 is a schematic overall structure diagram of the present invention;

FIG. 2 is a cross-sectional view taken along plane A-A of FIG. 1;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is a schematic structural view of the outer pressing sleeve of the present invention;

fig. 5 is a schematic structural view of the sealing press sleeve of the present invention;

fig. 6 is a schematic structural view of the inner joint of the present invention;

fig. 7 is a schematic structural view of the threaded gasket of the present invention.

In the figure: 1. a bellows; 2. a connecting assembly; 3. an inner tube; 4. an inner joint; 5. butting nuts; 6. sealing and pressing the sleeve; 7. a threaded spacer; 8. externally pressing the sleeve; 9. a first flanging; 10. second flanging; 11. third flanging; 12. a guide plate; 13. a guide post; 14. a chute; 15. a guide groove; 16. positioning ribs; 17. positioning a groove; 18. a limiting ring; 19. an annular projection; 20. an annular groove; 21. barb convex ribs; 22. a gasket; 23. a separation well.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example (b): the utility model provides a metal universal pipe, as shown in attached figures 1-7, comprising an inner pipe 3, a corrugated pipe 1 sleeved outside the inner pipe 3 and connecting components 2 arranged at two ends of the corrugated pipe 1; the connecting assembly 2 comprises an outer pressing sleeve 8, a sealing pressing sleeve 6, an inner joint 4, a threaded gasket 7 and a butt nut 5, wherein the outer pressing sleeve 8 is sleeved on the part, close to the end, of the periphery of the corrugated pipe 1, the outer pressing sleeve 8 is in interference fit with the corrugated pipe 1, the outer pressing sleeve 8 and the corrugated pipe 1 are made of stainless steel materials, so that the rigidity of the connecting part of the corrugated pipe 1 is enhanced, a first flanging 9 extends outwards from the outer end surface of the outer pressing sleeve 8, and the first flanging 9 is formed by bending the edge of the outer pressing sleeve 8; the sealing pressure sleeve 6 is inserted into a part of the inner periphery of the corrugated pipe 1 close to the end part, the sealing pressure sleeve 6 is in interference fit with the corrugated pipe 1, a second flanging 10 extends outwards from the outer end face of the sealing pressure sleeve 6, and the second flanging 10 abuts against the outer end face of the first flanging 9; an inner joint 4 is inserted at the end part of the inner pipe 3, the inner joint 4 extends into the sealing pressure sleeve 6 to enable the end part of the inner pipe 3 to be in sealing fit with the inner wall of the sealing pressure sleeve 6, a third flanging 11 extends outwards from the outer end face of the inner joint 4, and the third flanging 11 abuts against the outer end face of the second flanging 10; the butt-joint nut 5 is sleeved on the periphery of the corrugated pipe 1, the inner end of the butt-joint nut 5 is provided with a limiting ring 18 extending inwards, the limiting ring 18 is abutted against the inner end face of the first flanging 9, the threaded gasket 7 is in threaded connection with the butt nut 5, the threaded gasket 7 is abutted against the outer end face of the third flanging 11, when the butt-joint nut 5 is screwed with the external joint, the limiting ring 18 on the butt-joint nut 5 pushes the end part of the universal pipe to move towards the end part of the external joint until the end part of the external joint abuts against the thread gasket 7 on the outer end surface of the internal joint 4, the butt-joint nut 5 is continuously screwed to ensure that the end part of the external joint generates axial extrusion stress on the thread gasket 7, so as to ensure the tightness between the threaded gasket 7 and the inner joint 4 and between the threaded gasket 7 and the outer joint, thereby guarantee the leakproofness of the two connections under the circumstances of guaranteeing that universal pipe and external joint are firmly connected.

As shown in fig. 3 to 5, a plurality of guide plates 12 are arranged at a position, close to the outer end face, of the inner wall of the outer pressing sleeve 8, the guide plates 12 are uniformly distributed along the inner wall of the outer pressing sleeve 8, the bottom end of each guide plate 12 is abutted to the outer end face of the corrugated pipe 1, the length of the bottom end of each guide plate 12 is larger than the thickness of the corrugated pipe 1, sliding grooves 14 which are in sliding fit with the guide plates 12 are axially formed in the outer side wall of the sealing pressing sleeve 6, the number of the sliding grooves 14 is the same as that of the guide plates 12, and the guide plates 12 play a role in guiding the sealing pressing sleeve 6, so that the sealing pressing sleeve 6 can be conveniently inserted and taken out, meanwhile, the guide plates 12 can prevent the sealing pressing sleeve 6 from rotating circumferentially, and the mounting stability of the sealing pressing.

Wherein the guide plate 12 is in the shape of a right triangle or a right trapezoid, and the hypotenuse of the guide plate 12 is disposed on the side facing the outer end face of the outer pressing sleeve 8, which further facilitates the insertion and removal of the sealing pressing sleeve 6.

As shown in fig. 3 to 5, the guide post 13 is axially arranged on the guide plate 12, the diameter of the guide post 13 is larger than the thickness of the guide plate 12, and the guide groove 15 engaged with the guide post 13 is arranged in the sliding groove 14, so that not only is a further guiding function achieved, the sealing press sleeve 6 is convenient to disassemble and assemble, but also the mounting firmness of the sealing press sleeve 6 can be improved.

As shown in the attached drawings 3-5, the outer wall of the sealing pressing sleeve 6 is provided with a positioning rib 16 along the circumferential direction, the inner wall of the corrugated pipe 1 is provided with a positioning groove 17 matched with the positioning rib 16, the structure plays a role in axial limiting of the sealing pressing sleeve 6, and the installation firmness of the sealing pressing sleeve 6 is enhanced.

As shown in fig. 5, the inner end surface of the sealing press sleeve 6 is axially provided with a separation hole 23 for cutting off the positioning rib 16, when the sealing press sleeve 6 is inserted into the corrugated pipe 1, the part of the sealing press sleeve 6 with the positioning rib 16 is extruded by the inner wall of the corrugated pipe 1 to deform inwards due to the larger diameter, and the design of the separation hole 23 is to provide a deformation allowance for the part of the sealing press sleeve 6 with the positioning rib 16, thereby facilitating the installation of the sealing press sleeve 6.

As shown in fig. 6 and 7, a closed annular protrusion 19 is circumferentially disposed on an inner end surface of the threaded gasket 7, and an annular groove 20 engaged with the annular protrusion 19 is disposed on an outer end surface of the third flange 11, so that the threaded gasket 7 can be more firmly mounted, and the sealing property between the threaded gasket 7 and the third flange 11 can be enhanced.

As shown in fig. 6, the outer circumference of the nipple 4 is provided with an annular barb and rib 21, and the barb and rib 21 forms a pressing fit with the inner wall of the inner pipe 3, so that the installation firmness of the inner pipe 3 is enhanced.

As shown in fig. 3, a sealing gasket 22 is clamped between the first flange 9 and the limiting ring 18, and when the docking nut 5 is locked, the sealing gasket 22 can provide an axial elastic force for the docking nut 5, increase the friction of the docking nut 5 on the external connector, and play a role in preventing looseness.

Wherein, sealed pressure cover 6 is the elasticity material, like the silica gel material, can produce extrusion stress and then reinforcing and the leakproofness and the fixed effect between inner tube 3 and bellows 1 through deformation.

The working principle is as follows: the utility model discloses a 8 covers of external pressure establish in 1 periphery of bellows and strengthened the rigidity of this department near the position of tip, sealed pressure cover 6 has both played the leakproofness between sealed pressure cover 6 and the bellows 1 in inserting bellows 1 simultaneously, can be with providing the extrusion stress of the outside expansion of bellows 1 again, make bellows 1 closely firm with the cooperation of external pressure cover 8 to strengthen the fixed effect of 1 tip of bellows, avoid 1 tip of bellows to drop. The inner joint 4 is inserted and matched with the inner pipe 3 and then pressed into the sealing pressure sleeve 6, so that the end part of the inner pipe 3 is clamped between the inner joint 4 and the sealing pressure sleeve 6, the sealing performance between the inner joint 4 and the inner pipe 3 is ensured, and the medium is prevented from leaking from a gap between the inner joint 4 and the inner pipe 3. The adjacent first flanging 9 on the outer pressure sleeve 8, the second flanging 10 on the sealing pressure sleeve 6 and the third flanging 11 on the inner joint 4 are mutually butted to form a limiting structure, the limiting ring 18 on the butt-joint nut 5 is abutted against the inner end face of the first flanging 9, the threaded gasket 7 is abutted against the outer end face of the third flanging 11, when the butt-joint nut 5 is screwed with the external joint, the limiting ring 18 on the butt-joint nut 5 pushes the end part of the universal pipe to move towards the end part of the external joint until the end part of the external joint abuts against the thread gasket 7 on the outer end surface of the internal joint 4, the butt-joint nut 5 is continuously screwed to ensure that the end part of the external joint generates axial extrusion stress on the thread gasket 7, so as to ensure the tightness between the threaded gasket 7 and the inner joint 4 and between the threaded gasket 7 and the outer joint, thereby guarantee the leakproofness of the two connections under the circumstances of guaranteeing that universal pipe and external joint are firmly connected. And simultaneously, the utility model discloses simple structure need not during the dismouting with the help of other instruments, and the dismouting operation is very convenient.

Claims (10)

1. A metal universal pipe comprises an inner pipe (3), a corrugated pipe (1) sleeved outside the inner pipe (3) and connecting assemblies (2) arranged at two ends of the corrugated pipe (1); the method is characterized in that: the connecting assembly (2) comprises an outer pressing sleeve (8), a sealing pressing sleeve (6), an inner joint (4), a threaded gasket (7) and a butt nut (5), the outer pressing sleeve (8) is sleeved on the part, close to the end, of the periphery of the corrugated pipe (1), the outer pressing sleeve (8) is in interference fit with the corrugated pipe (1), and a first flanging (9) extends outwards from the outer end face of the outer pressing sleeve (8); the sealing pressure sleeve (6) is inserted into a part, close to the end, of the inner periphery of the corrugated pipe (1) in an inserting mode, the sealing pressure sleeve (6) is in interference fit with the corrugated pipe (1), a second flanging (10) extends outwards from the outer end face of the sealing pressure sleeve (6), and the second flanging (10) abuts against the outer end face of the first flanging (9); the inner joint (4) is inserted into the end part of the inner pipe (3), the inner joint (4) extends into the sealing press sleeve (6) to enable the end part of the inner pipe (3) to be in sealing fit with the inner wall of the sealing press sleeve (6), a third flanging (11) extends outwards from the outer end face of the inner joint (4), and the third flanging (11) abuts against the outer end face of the second flanging (10); the butt joint nut (5) is sleeved on the periphery of the corrugated pipe (1), the inner end of the butt joint nut (5) is provided with a limiting ring (18) extending inwards, the limiting ring (18) is abutted against the inner end face of the first flanging (9), the threaded gasket (7) is arranged in the butt joint nut (5), and the threaded gasket (7) is abutted against the outer end face of the third flanging (11).

2. A metal gimbal tube as claimed in claim 1, wherein: the outer pressure cover (8) inner wall is close to the position of outer terminal surface and is equipped with deflector (12), and the bottom of deflector (12) is inconsistent with the outer terminal surface of bellows (1), and the length of deflector (12) bottom is greater than the thickness of bellows (1), seted up on the lateral wall of sealed pressure cover (6) along the axial and constitute sliding fit's spout (14) with deflector (12).

3. A metal gimbal tube as claimed in claim 2, wherein: the guide plate (12) is in the shape of a right triangle or a right trapezoid, and the inclined edge of the guide plate (12) is arranged on one side facing the outer end face of the outward pressing sleeve (8).

4. A metal gimbal tube as claimed in claim 2, wherein: the guide plate (12) is provided with a guide post (13) along the axial direction, the diameter of the guide post (13) is larger than the thickness of the guide plate (12), and a guide groove (15) matched with the guide post (13) is arranged in the sliding groove (14).

5. A metal gimbal tube as claimed in claim 1, wherein: the outer wall of the sealing pressing sleeve (6) is provided with positioning ribs (16) along the circumferential direction, and the inner wall of the corrugated pipe (1) is provided with positioning grooves (17) matched with the positioning ribs (16).

6. A metal gimbal tube as claimed in claim 5, wherein: and a separation hole (23) for cutting off the positioning rib (16) is formed in the inner end surface of the sealing pressing sleeve (6) along the axial direction.

7. A metal gimbal tube as claimed in claim 1, wherein: the inner end face of the threaded gasket (7) is circumferentially provided with a closed annular protrusion (19), and the outer end face of the third flanging (11) is provided with an annular groove (20) matched with the annular protrusion (19).

8. A metal gimbal tube as claimed in claim 1, wherein: the periphery of the inner joint (4) is provided with an annular barb convex rib (21), and the barb convex rib (21) and the inner wall of the inner pipe (3) form extrusion fit.

9. A metal gimbal tube as claimed in claim 1, wherein: a sealing gasket (22) is clamped between the first flanging (9) and the limiting ring (18).

10. A metal gimbal tube as claimed in claim 1, wherein: the sealing pressure sleeve (6) is made of elastic materials.

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