CN202580476U

CN202580476U - Reducing-type half joint gasket

Info

Publication number: CN202580476U
Application number: CN2012202248629U
Authority: CN
Inventors: 焦发兆
Original assignee: ANHUI TONGFA EQUIPMENT Co Ltd
Current assignee: ANHUI TONGFA EQUIPMENT Co Ltd
Priority date: 2012-05-18
Filing date: 2012-05-18
Publication date: 2012-12-05
Anticipated expiration: 2022-05-18

Abstract

The utility model belongs to the technical field of pipeline repairs, in particular to a reducing-type half joint gasket. The reducing-type half joint gasket comprises two opposite semi-arc seal rings and seal strips which are respectively arranged on the end parts of the two seal rings and used for being connected with each other, and half of a minimal distance between the two end parts of the seal ring is greater than the distance from the middle point of the minimal-distance joint line of the two end parts to the bottom of an inner ring line of the seal ring. Due to the adoption of the reducing-type half joint gasket, the problem that two ends of the seal ring are broken and damaged by squeezing at the initial installation stage because of too small distance of the two end parts of the seal ring can be avoided, and the reducing-type half joint gasket is convenient in installation and long in service life.

Description

A kind of diameter reducing type sealing gaskets of Hafu joint

Technical field

The utility model belongs to the pipe first-aid technical field, is specifically related to a kind of diameter reducing type sealing gaskets of Hafu joint.

Background technique

Sealing gaskets of Hafu joint is the pipeline repairing device that matches and use with Hough joint housing, and it mainly realizes carrying out the sealed envelope repairing for the seepage of pipeline or breakage spot.The concrete structure of traditional sealing gaskets of Hafu joint is as shown in Figure 1, comprises the half arc seal ring A that is arranged on its two ends, between its seal ring A two end part, is provided with connection Stamping Steel Ribbon B each other simultaneously, and tandem array finally constitutes winding formula structure between above-mentioned each parts; The phase dorsal part inlay card that relies on two sealing gaskets when mounted relies on opposed applying of its relative sidepiece and sealed at both ends circle to fit with waiting the extruding of rushing to repair the pipeline outer tube wall in the prefabricated fixed groove of Hough joint housing, finally realizes its high sealing performance.Above-mentioned parts are found following problem often when long-term the use: at first, the seal ring two end part minimum separable of existing sealing gasket has all limited it less than the caliber of waiting to rush to repair pipeline when design; It has no doubt guaranteed to wait to rush to repair the fitting tightly property of pipeline outer wall and sealing gasket to a certain extent, yet, when assembling is installed; Often need be through of the rigid extruding of pipeline outer wall for the seal ring end; Force its end to be opened and make in the pipeline inlay card goes into, fitting operation difficulty not only is simultaneously when its pipeline outer wall roughness greatly the time; The pipeline outer wall takes place often to be forced crush seal circle end and causes its broken end damage problem; But when occur passing judgement crackle still naked eyes realize and change the Hough joint then and there, influence its maintenance efficiency at most, in case the dark line of fracture occurs; Or site environment then must cause the reduction of its actual life and frequently carrying out of maintenance work again when badly being difficult to realize; Secondly,, that is to say because existing seal ring profile all is width evenly and two symmetrical half arcs, its internal and external cambered surface place circle for concentric circle and its intrados shape with to wait to rush to repair pipeline outer wall radian in full accord, as shown in Figure 2; Like this; After whole repairing work was accomplished, because the frictional force that seal ring and Hough save the housing cell wall and wait to rush to repair the pipeline outer wall, the two end part amount of deformation that often causes seal ring on the contrary was greater than its middle section amount of deformation; The difference of the amount of deformation of its seal ring each several part; Cause its pressure force to produce difference, rollover phenomenon and high-pressure liquid that this stage casing sealing part very easily takes place during real work are gone out accident, cause the seal failure of Hough joint; The frequent maintenance of having to, thus very big puzzlement brought for the workmen.

Summary of the invention

The purpose of the utility model provides a kind of diameter reducing type sealing gaskets of Hafu joint, can stop its two end part extrusion fracture damage problem of the installation starting stage that existing seal ring causes owing to the two end part spacing is too small, its easy for installation and long service life.

For realizing above-mentioned purpose; The utility model has adopted following technological scheme: a kind of diameter reducing type sealing gaskets of Hafu joint; What comprise the two half arc seal rings that are oppositely arranged and be arranged at place, two seal ring ends is used to connect Stamping Steel Ribbon each other, half the mid point to the seal ring inner loop-line bottom spacing greater than its two end part minimum separable line of said seal ring two end part minimum separable.

The beneficial effect of the utility model is: after adopting said structure, its seal ring integral body is and presents the semiarc shape of Section of Outer Ring Line for cooperating with Hough joint housing pregroove marks, and its inner loop-line then presents the similar enlarging ellipticity structure of lateral arrangement; At this moment, its inner loop-line profile or can directly be half ellipse also can be its oval part.After in pipeline to be rushed to repair is placed into the cavity that Hough joint housing encloses, because the said structure of seal ring, the frictional force at its pipeline and seal ring two end part can greatly be reduced even can be avoided fully; Even there are gap slightly in seal ring two ends and pipeline outer wall; The rubber displacement that also can produce through pipeline crush seal circle stage casing is also filled above-mentioned gap; Thereby its two end part extrusion fracture of having stopped the installation starting stage that existing seal ring causes owing to the two end part spacing is too small damages problem, its easy for installation and long service life.

Description of drawings

Fig. 1 is existing sealing gaskets of Hafu joint structural representation;

Fig. 2 is the seal ring part front view of Fig. 1;

Fig. 3 is the structural representation of wherein a kind of implementation of the utility model;

Fig. 4 is the seal ring part front view of Fig. 3;

Fig. 5-6 is the assembly process schematic representation of the utility model.

Embodiment

A kind of diameter reducing type sealing gaskets of Hafu joint; What comprise the two half arc seal rings 10 that are oppositely arranged and be arranged at place, two seal rings, 10 ends is used to connect Stamping Steel Ribbon 20 each other; Half the mid point to the seal ring 10 inner loop-lines bottom spacing greater than its two end part minimum separable line of said seal ring 10 two end part minimum separables is shown in Fig. 3-6; Seal ring 10 two end part here and inner loop-line thereof bottom, particular location can be with reference to shown in Figure 4, and the mid point of the minimum separable line at its two end part is the sign place, the center of circle of R1 position among Fig. 4.

Further; The center of circle of the inside and outside loop wires of seal ring 10 place circle mutually from and the installation direction setting of two circle center line connecting parallel sealing circles 10; The elongation line of above-mentioned line and seal ring 10 inner ring surfaces have intersection point; The center of circle of seal ring 10 Section of Outer Ring Line place circle is positioned between the center of circle and this intersection point of inner loop-line place circle, specifically shown in Fig. 3-5.In fact; The utility model is compared traditional existing technology; Its projecting point promptly is its unequal section formula design; Be specially: on the front view (also being Fig. 4) with seal ring 10, the Section of Outer Ring Line of its seal ring 10 (also being sign place, R1 place among Fig. 4) presents the semicircle shape that cooperates with Hough joint housing a pregroove marks, and its integral body then is the narrow and middle wide unequal section columnar structure in two ends.Like this, in when assembling, at first will wait to rush to repair pipeline b and be placed in the cylindrical cavity that two Houghs joint housing a constituted; At this moment; Sealing gasket end in the Hough joint housing a constitutes the conflict fit-state before the assembling fully to each other, and is as shown in Figure 5, waits to rush to repair pipeline b and also only touches with the two ends of seal ring 10 inner ring surfaces (also being sign place, R2 place among Fig. 4) and engage; Because then only there are frictional force in the unequal section shape of seal ring 10 itself, the stage casing of seal ring 10 with Hough joint housing a cell wall; Afterwards; Through tightening the assembling bolt that is positioned at Hough joint housing a both sides, Hough joint housing a begins pressing and is positioned at its sealing gasket, under the assembly force effect of assembling bolt; Seal ring 10 two ends can't be thickened down with waiting the synergy of rushing to repair pipeline b outer tube wall by Hough joint housing a inwall; Again because the side of Hough joint housing a all must be given prominence to usually along certain altitude in seal ring 10 two ends, under seal ring 10 two ends extruding force effects, the pressure that produces because of pressurized when seal ring 10 two ends can't save when obtaining discharging on housing a inwall and the pipeline b outer tube wall at Hough; Its extruding force begins progressively to shift to its stage casing; Its stage casing then begins to receive the transfer at its two ends and the pressure that comes and corresponding progressively thickens, thereby extruding waits to rush to repair the outer tube wall of pipeline b, realizes its sealing effect.Compare the concentric circle type structure of conventional seals circle, the harmony of pressure force everywhere when its unequal section formula structure more can be guaranteed work, long service life.

Further; Can find out by its Fig. 4; Because the special tectonic of seal ring 10 inside-and-outside rings own causes its seal ring 10 inner loop-lines place diameter of a circle and waits to rush to repair the identical setting of pipeline caliber, thereby it is smooth and easy fluently to guarantee to wait to rush to repair the snap fit of encircling the end in pipeline outer wall and the seal ring 10; The clamping problem on obstacle of avoiding the too small spacing at traditional inner loop-line two end part and producing, its long service life and maintenance efficiency are high.

As this adaptive further preferred version, shown in Fig. 3-4, seal ring 10 both ends of the surface are closed on its inner loop-line place and are provided with slope shape horn shape small boss 11, and small boss 11 inner side surfaces are outwards postponed for the profile that belongs to circle along seal ring 10 inner loop-lines and formed; Simultaneously, the center of circle spacing of seal ring 10 inside and outside loop wire place circles is 2～5mm.Because before assembling fully, seal ring 10 stage casings and wait to rush to repair between pipeline b and certainly exist the gap, as shown in Figure 5; At this moment; Through in the both ends of the surface of seal ring 10 boss being set in advance, thereby seal ring 10 stage casings after the assembling being provided and waiting to rush to repair the compensation rate between pipeline b, under the assembly force effect of assembling bolt; Small boss 11 produces distortion and pushes each other and caves in; Thereby drive the part material production displacement of waiting to rush to repair pipeline b outer wall place that is positioned on the seal ring 10, finally stop up aforementioned gap fully, accomplish its whole sealing assembly manipulation.

The utility model improves through the uniqueness for seal ring 10; Thereby its structural firm performance of complete realization; Not only its phenomenal growth in working life in its initial high sealing demand of realization; Ease-to-operate when simultaneously still having acted on its maintain and replace meets the fast pace demand of enterprise practical economic benefit and field maintenance.

Claims

1. diameter reducing type sealing gaskets of Hafu joint; What comprise the two half arc seal rings (10) that are oppositely arranged and be arranged at place, two seal rings (10) end is used to connect Stamping Steel Ribbon (20) each other, it is characterized in that: half the mid point to seal ring (10) the inner loop-line bottom spacing greater than its two end part minimum separable line of said seal ring (10) two end part minimum separable.

2. diameter reducing type sealing gaskets of Hafu joint according to claim 1; It is characterized in that: the center of circle of the inside and outside loop wire of seal ring (10) place circle mutually from and the installation direction setting of two circle center line connecting parallel sealing circles (10); The elongation line of above-mentioned line and seal ring (10) inner ring surface has intersection point, and the center of circle of seal ring (10) Section of Outer Ring Line place circle is positioned between the center of circle and this intersection point of inner loop-line place circle.

3. diameter reducing type sealing gaskets of Hafu joint according to claim 2 is characterized in that: seal ring (10) inner loop-line belongs to diameter of a circle and waits to rush to repair the identical setting of pipeline caliber.

4. diameter reducing type sealing gaskets of Hafu joint according to claim 3; It is characterized in that: seal ring (10) both ends of the surface are closed on its inner loop-line place and are provided with slope shape horn shape small boss (11), and small boss (11) inner side surface is outwards postponed for the profile that belongs to circle along seal ring (10) inner loop-line and formed.

5. according to claim 2 or 3 or 4 described diameter reducing type sealing gaskets of Hafu joint, it is characterized in that: the center of circle spacing of the inside and outside loop wire of seal ring (10) place circle is 2～5mm.