CN209213267U - A kind of seal for pipe joints expansion pipe - Google Patents

Abstract

The utility model relates to Pipe leakage stopper technical field, especially a kind of seal for pipe joints expansion pipe.It includes the first limit casing, expansion sleeve and the second limit casing for positioning axis and being sequentially sheathed on positioning axis, first limit casing and the second limit casing are moved toward one another with extrusion expansion casing, and expansion sleeve is made to shrink distorted movement and makees expansion distorted movement along the radial direction for positioning axis simultaneously after being pressurized along the axial direction for positioning axis.The utility model carries out the adjusting of axial spacing between the two by adjusting the position of the first limit casing and/or the second limit casing on positioning axis, to form axial compression effect (being equivalent to the regulation realized to the degrees of expansion of expansion sleeve) to expansion sleeve so that entire connector can be suitable for the pipelines of different tube diameters using as block connector or air-leakage test part come using.

Description

A kind of seal for pipe joints expansion pipe

Technical field

The utility model relates to Pipe leakage stopper technical field, especially a kind of seal for pipe joints expansion pipe.

Background technique

It is well known that Expansion sealing connector is that one kind is widely used in fluid media (medium)s such as oil circuit, water route, gas circuits Conveyance conduit or storage container be sealed the device of closure and leak detection operation.In actual application, due to pipe There are the differences of parameter and specification between road or container path mouth, often require to use the expansion pipe of different size；However, Existing expansion pipe generally existing caliber bad adaptability, poor sealing effect, dismounting and the problems such as inconvenient, such as: Most of expansion pipe may be only available for the pipeline of specific standard size, it is easy to cause the wasting of resources, expansion pipe use at This high series of problems.

Utility model content

In view of the deficiency of the prior art, the purpose of this utility model is to provide a kind of seal for pipe joints expansions to connect Head.

To achieve the goals above, the utility model adopts the following technical solution:

A kind of seal for pipe joints expansion pipe, it includes a positioning axis, one is sheathed in positioning by one end of positioning axis The first limit casing on axis, one are sheathed on the second limit casing on positioning axis and a set of by the other end of positioning axis On positioning axis and the expansion sleeve that is held between the first limit casing and the second limit casing, first limit sleeve Pipe is moved toward one another with the second limit casing with extrusion expansion casing, the axial direction side of edge positioning axis after the expansion sleeve is pressurized Simultaneously make expansion distorted movement along the radial direction of positioning axis simultaneously to contraction distorted movement is made.

Preferably, the positioning axis is tubular body structure.

Preferably, the expansion sleeve is to be made of elastic material and axial cross section shape is in the " T " shaped tubular structure of class Body；First limit casing is that axial cross section shape is in the " T " shaped tubular body structure of class；

The axial pipe portion of the expansion sleeve is sheathed in the axial pipe portion of the first limit casing and is located at the first limit sleeve The peripheral side of pipe, the nozzle back side of the radial pipe portion of the nozzle end face and the first limit casing of the axial pipe portion of the expansion sleeve It offsets, the nozzle end face of the nozzle end face of radial pipe portion and the second limit casing offsets；And the axial direction of first limit casing Axial buffer spacing is formed between the port surface of pipe portion and the port surface of the second limit casing.

Preferably, the first limit casing screw thread is socketed on positioning axis.

Preferably, second limit casing includes pushing lantern ring and locking lantern ring, and the lantern ring sliding sleeve that pushes is set to It on positioning axis and is held between expansion sleeve and locking lantern ring, the locking lantern ring thread bush is connected on positioning axis.

Preferably, it is formed with a limit baffle ring on the periphery wall of the positioning axis, the outer diameter of the limit baffle ring is equal to Or greater than the internal diameter for pushing lantern ring, it is less than the outer of limit baffle ring embedded at least one internal diameter on the internal perisporium for pushing lantern ring The buffering slip ring of diameter.

Preferably, it is described positioning axis outer peripheral surface and be located at buffering slip ring shift motion within the scope of region be it is smooth Periphery.

Preferably, the cross sectional shape of the circumferential profile shape of the limit baffle ring in the axial direction is trapezoidal and described in class The maximum outside diameter end of limit baffle ring is located at the opposite side of the first limit casing.

Preferably, at least one circle is formed on the collar extension end face of the locking lantern ring to offset with the collar extension end face for pushing lantern ring Buffering bulge loop.

As the above scheme is adopted, the utility model is existed by adjusting the first limit casing and/or the second limit casing The position on axis is positioned to carry out the adjusting of axial spacing between the two, to form axial compression effect to expansion sleeve (being equivalent to the regulation realized to the degrees of expansion of expansion sleeve), so that entire connector can be suitable for the pipe of different tube diameters Road using as block connector or air-leakage test part come using；Its simple and compact for structure, component disassembling, assembling and replacing and easy to operate fast Victory has very strong practical value and market popularization value.

Detailed description of the invention

Fig. 1 is the Standard schematic diagram of the utility model embodiment；

Fig. 2 is the decomposition texture schematic diagram of the utility model embodiment；

Fig. 3 is the schematic diagram of the section structure of the utility model embodiment；

Fig. 4 is the operating principle schematic diagram of the utility model embodiment；

Specific embodiment

The embodiments of the present invention are described in detail below in conjunction with attached drawing, but the utility model can be by right It is required that the multitude of different ways for limiting and covering is implemented.

As shown in Figures 1 to 4, a kind of seal for pipe joints expansion pipe provided by the embodiment of the utility model, it includes a positioning Axis 10, one is sheathed on the first limit casing 20, one on positioning axis 10 by positioning axis 10 by one end of positioning axis 10 The second limit casing 30 for being sheathed on positioning axis 10 of the other end and one be sheathed on positioning axis 10 and be held on the Expansion sleeve 40 between one limit casing 20 and the second limit casing 30；It should be pointed out that " the set that the present embodiment is addressed If " represented by meaning include but is not limited to that screw thread socket mode or damp type are slidably socketed mode and/or buckle type Socket mode.As a result, using deformation behavior is expanded possessed by expansion sleeve 40 itself, when the first limit casing 20 and the second limit Position casing 30 is moved toward one another with extrusion expansion casing 40, and expansion sleeve 40 is the extruding force that will receive axial direction, to make Radial direction while it can make contraction distorted movement along the axial direction of positioning axis 10 along positioning axis 10 expands Distorted movement.

Based on this, after entire connector is installed in pipeline, by adjusting the first limit casing 20 and/or the second limit Position of the casing 30 on positioning axis 10 can be realized the adjusting to axial spacing between the two and (based on limit casing and determine The difference for being arranged relationship between the axis 10 of position, can form following regulative mode, it may be assumed that the 1, first limit casing 20 and the second limit One of casing 30 makees position movement relative to the direction where positioning axis 10 towards expansion sleeve 40 simultaneously；2, the first limit Relative position between position casing 20 and positioning axis 10 is fixed, and it is opposite on positioning axis 10 to adjust the second limit casing 30 Position；3, the relative position between the second limit casing 30 and positioning axis 10 is fixed, and is adjusted the first limit casing 20 and is being positioned Relative position on axis 10), to form axial compression effect to expansion sleeve 40 or axially release effect (i.e.: quite In regulation of the realization to the degrees of expansion of expansion sleeve 40) so that entire connector can be suitable in expansion sleeve 30 The pipeline of different tube diameters in maximum swelling deformation range.It is swollen using its when expansion sleeve 40 is after compression expands deformation Swollen part and inner wall of the pipe generate the relationship that offsets to realize the closure to pipeline, and based on the structure choice to positioning axis 10 Difference, when positioning axis 10 using simple columnar structures, using whole device as pipeline closure plug (or Connector) it uses；When positioning axis 10 using tubular body structure, then it is used as using whole device to pipeline or pressure vessel Carry out air-leakage test auxiliary device come using；In addition, can also by selection replacement different length expansion sleeve 40 come Entire connector is further expanded to the pipeline adaptability of different tube diameters；And pass through the first limit casing of dismantling 20 or the second limit Casing 30 can realize the quick-replaceable to expansion sleeve 40.

As a preferred embodiment, the positioning axis 10 of the present embodiment is preferably tubular body structure, by blocking in positioning Axis 10 or conducting positioning axis 10 come realize entire connector different function purposes (that is: as block plug come using or Auxiliary device as air-leakage test come using).

To guarantee expansion deformation effects of the expansion sleeve 40 after compression, its plugging effect to pipeline, this implementation are improved The expansion sleeve 40 of example can be made according to the actual situation of such as rubber elastomeric material and its generally axial cross section shape In the " T " shaped tubular body structure of class；Correspondingly, the first limit casing 20 is in the " T " shaped tubulose knot of class using axial cross section shape Structure body；First limit casing 20 is sheathed on positioning axis 10 with expansion sleeve 40 using symmetrical mode is similar to, it may be assumed that expansion The axial pipe portion (can be understood as its tubule path portion) of casing 40 is sheathed in the axial pipe portion of the first limit casing 20 simultaneously Positioned at the peripheral side of the first limit casing 20, (that is: the caliber of the axial pipe portion of the first limit casing 20 is less than the axis of expansion sleeve 40 To the caliber of pipe portion), and the nozzle end face of the axial pipe portion of expansion sleeve 40 then with the radial pipe portion of the first limit casing 20 The nozzle back side offsets, the nozzle end face of the nozzle end face of radial pipe portion and the second limit casing 30 offsets；Meanwhile in the first limit Axial buffer spacing d is formed between the port surface of the axial pipe portion of casing 20 and the port surface of the second limit casing 30 (can be with Understand are as follows: the length of the axial pipe portion of the first limit casing 20 is less than the length of the axial pipe portion of expansion sleeve 40).

The socket relationship between the axial pipe portion of the first limit casing 20 and the axial pipe portion of expansion sleeve 40 is utilized as a result, (or caliber difference) can form inner circumferential support and the effect of guiding to the axial pipe portion of expansion sleeve 40, guarantee expansion sleeve 40 Make the effect of stretching motion in the axial direction；And utilize axial buffer spacing d (that is: the difference of axial length) can be in positioning axis 10 peripheral side, the end side of the first limit casing 20, the end side of the second limit casing 30 and expansion sleeve 40 inner circumferential side shape At relatively closed buffer chamber, abundant sky is provided to be compressed axially deformation for the generation of expansion sleeve 40 and be radially expanded deformation Between, to obtain bigger expansion ratio to adapt to the pipeline of more different tube diameters.

Preferably, for convenient for quickly being dismounted to the first limit casing 20 and expansion sleeve 40, this implementation First limit casing 20 of example is sheathed on positioning axis 10 by the way of screw thread socket.It as a result, can be by screwing the second limit Position casing 30 drives the positioning axis 10 to move axially simultaneously towards the direction where the first limit casing 20 with extrusion expansion Casing 40 (that is: is equivalent to using the second limit casing 30 as the regulating member of spacing between two casings)；Certainly, this implementation Second limit casing 30 of example can also be used same mode and be sheathed on positioning axis 10, so that two casings can be used as tune Section component come using, while also for fast assembling-disassembling replace expansion sleeve 40 create structural condition.

For the structure for optimizing entire connector to the maximum extent, the practicality energy, second limit casing of the present embodiment are improved 30 include pushing lantern ring 31 and locking lantern ring 32；Wherein, 31 sliding sleeve of lantern ring is pushed to be set on positioning axis 10 and be held on swollen (that is: the nozzle end face of the radial pipe portion of expansion sleeve 40 and the collar extension for pushing lantern ring 31 between expansion set pipe 40 and locking lantern ring 32 End face offsets), and locking lantern ring 32 is then sheathed on positioning axis 10 by the way of screw thread socket.Operator is logical as a result, The tightened only casing 32 of overwinding can will not only push lantern ring 31 and be assemblied on positioning axis 10 and be located at the first limit casing 20 Opposite side (that is: is held between expansion sleeve 40 and locking lantern ring 32), and be can use and pushed lantern ring 31 and positioning axis Being slidably socketed relationship and can push and push lantern ring 31 to carry out position mobile between 10, to directly be squeezed using lantern ring 31 is pushed Compression swelling casing 40 is so that it expands deformation.Certainly, for convenient for operation, can be arranged on the periphery wall of locking lantern ring 32 prevent Sliding lines (being not marked in figure).

Push lantern ring 31 to reduce and position the frictional force between axis 10, at the same to push the shift motion of lantern ring 31 into Row limit is to avoid it causes excessively extruding to expansion sleeve 40 under the cooperation with the first limit casing 20 and reduces expansion sleeve The function of pipe 40, so using entire second limit casing 30 as the regulating member of entire connector come using positioning A limit baffle ring 11 is formed on the periphery wall of axis 10, the outer diameter of limit baffle ring 11 is equal to or more than push the interior of lantern ring 31 Diameter, meanwhile, it is less than the snubber slide of the outer diameter of limit baffle ring 11 embedded at least one internal diameter on the internal perisporium for pushing lantern ring 31 Ring 33 (it can be made of materials such as rubber as the case may be).Axis 10 and set is pushed using being held on positioning as a result, Buffering slip ring 33 between ring 31 can avoid pushing lantern ring 31 and directly be contacted with positioning axis 10, support to be equivalent to reduction The contact area of pushing sleeve ring 31 and positioning axis 10, guarantee push lantern ring 31 under the promotion of locking lantern ring 32 relative in positioning Axis 10 makees the mobile effect in position of slidingtype；It can also play the role of structure interval using buffering slip ring 33 simultaneously to seal；And it is sharp With the internal diameter difference between limit baffle ring 11 and buffering slip ring 33,11 pairs of buffering slip rings 33 of limit baffle ring can be made to limit, into And realize limit to the shift motion for pushing lantern ring 31, it, can band with after screwing locking lantern ring 32 to certain distance Dynamic positioning axis 10 is moved towards the direction where the first limit casing 20 simultaneously, to change between two limit casings Spacing is to form extrusion effect to expansion sleeve 40.

For contact effect enhancing buffering slip ring 33 and position axis 10, raising pushes the movement of lantern ring 31 and to expansion sleeve The squeezing effect of pipe 40 and ensure locking lantern ring 32 after screwing certain stroke i.e. will drive positioning axis 10 relative to first Limit casing 20 synchronizes rotation, the outer peripheral surface of the positioning axis 10 of the present embodiment and the shift motion for being located at buffering slip ring 33 Region in range is preferably smooth periphery.

For the structural strength for enhancing limit baffle ring 11 itself, the circumferential profile shape of the limit baffle ring 11 of the present embodiment is in axis It is trapezoidal in class to the cross sectional shape in direction, and the maximum outside diameter end of limit baffle ring 11 is located at the opposite side of the first limit casing 20 (that is: the end face at maximum outside diameter end is used to offset with buffering slip ring 33 and limit to it).

To guarantee that locking lantern ring 32 to the promotion effect for pushing lantern ring 31, is formed on the collar extension end face of locking lantern ring 32 At least one encloses and pushes the buffering bulge loop 34 that the collar extension end face of lantern ring 31 offsets.It can be subtracted by the buffering bulge loop 34 of setting as a result, Small locking lantern ring 32 and the contact area between lantern ring 31 is pushed, frictional force between the two is reduced, thus screwing lock sleeve It can swimmingly be pushed during ring 32 and push the progress of lantern ring 31 position movement.

The above is only the preferred embodiment of the present invention, and therefore it does not limit the scope of the patent of the utility model, Equivalent structure or equivalent flow shift made by using the description of the utility model and the drawings, is directly or indirectly transported Used in other related technical areas, it is also included in the patent protection scope of the utility model.

Claims (9)

1. a kind of seal for pipe joints expansion pipe, it is characterised in that: it includes a positioning axis, one is arranged by one end of positioning axis The second limit casing positioned on axis is sheathed on by the other end of positioning axis in positioning the first limit casing on axis, one And one be sheathed on positioning axis and the expansion sleeve that is held between the first limit casing and the second limit casing, described the One limit casing and the second limit casing are moved toward one another with extrusion expansion casing, positioning axis in edge after the expansion sleeve is pressurized Axial direction make shrink distorted movement and simultaneously along positioning axis radial direction make expansion distorted movement.

2. a kind of seal for pipe joints expansion pipe as described in claim 1, it is characterised in that: the positioning axis is tubular structure Body.

3. a kind of seal for pipe joints expansion pipe as described in claim 1, it is characterised in that: the expansion sleeve is by elastic material Material is made and axial cross section shape is in the " T " shaped tubular body structure of class；First limit casing is that axial cross section shape is in class " T " shaped tubular body structure；

The axial pipe portion of the expansion sleeve is sheathed in the axial pipe portion of the first limit casing and is located at the first limit casing Peripheral side, the nozzle back side phase of the radial pipe portion of the nozzle end face and the first limit casing of the axial pipe portion of the expansion sleeve It supports, the nozzle end face of the nozzle end face of radial pipe portion and the second limit casing offsets；And the tube axial of first limit casing Axial buffer spacing is formed between the port surface in portion and the port surface of the second limit casing.

4. a kind of seal for pipe joints expansion pipe as described in claim 1, it is characterised in that: the first limit casing thread bush It is connected on positioning axis.

5. such as a kind of seal for pipe joints expansion pipe of any of claims 1-4, it is characterised in that: second limit Casing includes pushing lantern ring and locking lantern ring, it is described push lantern ring sliding sleeve be set on positioning axis and be held on expansion sleeve with Between locking lantern ring, the locking lantern ring thread bush is connected on positioning axis.

6. a kind of seal for pipe joints expansion pipe as claimed in claim 5, it is characterised in that: on the periphery wall of the positioning axis It is formed with a limit baffle ring, the outer diameter of the limit baffle ring is equal to or more than push the internal diameter of lantern ring, described to push the interior of lantern ring It is less than the buffering slip ring of the outer diameter of limit baffle ring on peripheral wall embedded at least one internal diameter.

7. a kind of seal for pipe joints expansion pipe as claimed in claim 6, it is characterised in that: the outer peripheral surface of the positioning axis and Region within the scope of the shift motion of buffering slip ring is smooth periphery.

8. a kind of seal for pipe joints expansion pipe as claimed in claim 6, it is characterised in that: the circumferential profile of the limit baffle ring The cross sectional shape of shape in the axial direction is trapezoidal in class, and the maximum outside diameter end of the limit baffle ring is located at the first limit casing Opposite side.

9. a kind of seal for pipe joints expansion pipe as claimed in claim 5, it is characterised in that: the collar extension end face of the locking lantern ring On be formed at least one circle with push the buffering bulge loop that the collar extension end face of lantern ring offsets.