TW201313996A - Sealing material for conduit - Google Patents

Abstract

The present invention provides a sealing material for conduit, wherein a strip force produced by the sealing material can be converted to a fixing force of the sealing material when the fitting is jointed. The sealing material for conduit according to this invention comprises an embedding portion for embedding in the fitting and a water stop portion comprising a plurality of lip portions arranged in parallel and forms an internal hole and an external hole that have thickness extending across the water stop portion and the embedding portion and are arranged horizontally and juxtaposed each other.

Description

Pipe sealant

The invention relates to a cement pipe sealing material, in particular to a sealing material for a pipe used in an inner joint.

The open end of the pipe culvert and the like form a male connector and a female connector which are mutually engageable, and the sealing material attached to the circumferential direction of the opposite end of the one end joint is inserted into the joint It is a structure that can stop water.

Fig. 5(a) and (b) are schematic views showing an embodiment of a sealing material 50 for a conventional inner sleeve attached to a male joint.

The conventional sealant 50 includes an insert portion 51 embedded in the outer peripheral surface of the male joint body and a water stop portion 52 integrally formed with the insert portion 51.

A cavity 53 having a laterally elliptical cross section is formed between the fitting portion 51 and the water stopping portion 52, and when the joint is fitted, the cavity 53 can be elastically deformed in the diameter reducing direction of the water stopping portion 52.

Further, in Patent Document 1, it is disclosed that in order to enhance the fixing force of the sealant-embedded portion, a method is to engage a metal snap at equal intervals on the outer peripheral surface of the insert portion.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Publication No. 2006-22553 (Fig. 3, 4)

[Summary of the Invention]

Conventional sealants have the following disadvantages.

<1> In order to ensure good water repellency of the joint portion, the elastic force of the water stop portion 52 of the sealant 50 is increased, and the joint surface opposed to the water stop portion 52 is strongly pressed.

However, as shown in Fig. 5(b), when the inner sleeve is fitted with the joint, the frictional force generated between the water stop portion 52 and the joint surface causes the sealant 50 to be dragged, and the drag force is outside the insert portion 51. The resulting peel force F.

The fitting portion 51 is warped due to the peeling force F, so that the sealing property of the sealing member 50 is broken.

<2> In order to prevent the sealing material 50 from being warped in the fitting portion 51 and ensuring the water repellency of the fitting portion 51, the elastic force of the water stopping portion 52 is reduced, and as a result, the water stopping property of the water stopping portion 52 is broken.

As a result, when the conventional sealant 50 prevents the insertion portion 51 from being warped, it is difficult to balance the water retention of the insert portion 51 and the water stop portion 52.

<3> The sealant disclosed in Patent Document 1 is required to additionally provide a plurality of lock rings in the insert portion after the sealant is formed, and therefore, the sealant is expensive and requires an additional interlocking ring. The process of the process leads to the drawbacks of the complicated process of the sealant.

It is an object of the present invention to provide at least one of the following sealants.

<1> A sealing material is provided which, when fitting a joint, converts the peeling force generated by the sealing material into a fixing force of the sealing material.

<2> Prevent the sealant from being ejected in the fitting portion, and ensure the water repellency of the insert portion and the water stop portion.

<3> A sealing material is provided which does not require additional components and maintains a high seal.

<4> Providing a sealant which is economical and processable.

The present invention provides a sealant for a pipe channel, comprising: an insert portion embedded in the joint and having at least one bottom portion; and a water stop portion in which a plurality of lips are arranged side by side and integrally formed with the insert portion, and is characterized in that: An inner hollow and an outer hollow having a thickness spanning between the water stop and the insert and laterally side by side; a beam formed between the bottom of the plurality of lips and the second cavity; and an inner side a pillar, a middle pillar and an outer pillar formed between the beam and the bottom; wherein the inner cavity is located between the inner pillar and the middle pillar; the outer cavity is located between the middle pillar and the outer pillar By the inner cavity, the outer cavity, the beam, the inner pillar, the middle pillar and the outer pillar, the peeling force generated on the outer side of the sealing material can be converted into a sealing material when the fitting is formed in the fitting joint The mechanism of the force of the fixation force.

Further, in the present invention, the intermediate pillar is disposed at a position where the center of the beam is offset toward the inner side, and the thickness of the intermediate pillar is gradually thickened from the free end toward the bottom end.

Moreover, in the present invention, the inner cavity and the outer cavity have a slightly triangular cross-sectional shape, and the outer cavity is larger than the inner cavity.

Further, in the present invention, the plurality of lips are composed of an inner lip portion, an intermediate lip portion, and an outer lip portion.

Moreover, in the present invention, the V-shaped engaging groove is preferably formed on both sides of the fitting portion.

The present invention can exert at least one of the following effects.

<1> Since the sealing material has a force conversion mechanism, it is possible to effectively and surely prevent the outer side of the fitting portion of the sealing material from being warped when the fitting is fitted.

<2> The force conversion mechanism is not easily affected by the elastic force of the water stop portion, and the spring force of the water stop portion can be set high.

Therefore, it is possible to prevent the insertion portion from being warped by the conventional sealant, and to ensure that the insert portion and the water stop portion have good water repellency.

<3> The shape of the sealant is not much different from the conventional one. Since only the shape and number of voids formed inside can be changed, it can be easily produced, so economical and processability are better.

<4> The transmission force transmission mechanism can enhance the force of the sealing portion of the sealing material to press the joint body when the fitting is fitted, so as to further improve the sealing property of the fitting portion.

<5> While the middle pillar is offset from the center of the beam toward the inside, the thickness of the middle pillar is gradually increased, so that the elastic force of the middle pillar changes direction again and acts on the beam.

<6> If the engagement groove is formed on both sides of the sealant-embedded portion, the outer peripheral surface of the engagement groove and the joint body can be closely adhered to further enhance the fixing force of the insert portion, and the insert portion can be reinforced only in the enlarged seal area region. Waterstop.

[Formation for carrying out the invention]

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

〔composition〕 <1>Summary of sealing material for pipe and canal

Fig. 1 is a perspective view of a sealant 20 for a canal according to the present invention (hereinafter also referred to as "sealing material"), and Fig. 2 is a cross-sectional view of a sealant.

The sealing material 20 of the present invention is embedded and mounted on the opposite side of the male connector or the female connector, and has an embedded portion 21 embedded in the joint and a plurality of lips above the embedded portion 21. The water stopping portion 25 composed of the parts is integrally formed of a well-known rubber material. In this embodiment, the sealing portion 20 of the sealing material 20 is embedded in the outer peripheral surface of the male connector 10, but may be embedded in the female connector body. Inner circumference.

In the following, the respective portions of the sealing material 20 are further described. In the description, the front end of the male connector 10 is defined as "outside" or "outside", and the bottom end of the male connector 10 is defined as "inside" or "inside".

<2> Embedding Department

The fitting portion 21 is fitted to a portion of the outer peripheral surface of the male joint 10 .

Further, the embedding portion 21 shown in Fig. 2 is provided with a bottom portion 22 having a slightly triangular overhang on the inner and outer sides, and inner and outer flanges 23a, 23b extending above the bottom portion 22 and extending toward the inner and outer sides, and the bottom portion 22 and each protrusion Engagement grooves 24 and 24 having a V shape are formed between the edges 23a and 23b.

The engaging grooves 24 and 24 are formed on the left and right sides of the inserting portion 21 to enlarge the fixing force and the sealing area of the body of the male connector 10. Therefore, the lateral width L _{1 of the} bottom portion 22 can be smaller than the lateral width of the inner and outer flanges 23a and 23b. L ₂ to save raw materials.

<3> Water stop

The water stop portion 25 is a portion exposed from the outer peripheral surface of the male joint 10.

Further, the water stopping portion 25 shown in Fig. 2 is provided with an inner lip portion 25a, an intermediate lip portion 25b, and an outer lip portion 25c from the inside to the outside.

The intermediate lip portion 25b of the present embodiment is singular, but a plurality of intermediate lip portions 25b may be formed.

Each of the lips 25a-25c is formed at a distance and arranged side by side, which is inclined at a small angle from the outside to the inside.

<4>The internal structure of the sealant

Referring to Figure 2, the internal structure of the sealant 20 will be further explained.

Inside the sealant 20, side voids 30 and outer voids 31 which are spanned between the water stop portion 25 and the insert portion 21 are formed side by side in the lateral direction.

Each of the lips 25a-25c has a beam 26 supporting the plurality of lips 25a-25c between the bottom of the groove and the two holes 30, 31, and between the beam 26 and the bottom 22, the inner pillar 27 and the middle pillar 28 are formed from the inside to the outside. And the outer pillar 29.

Further, the relationship between the constituent elements will be described. The inner cavity 30 is located between the inner pillar 27 and the intermediate pillar 28, and the outer hollow 31 is located between the intermediate pillar 28 and the outer pillar 29. The outer cavity 31 has a larger cross-sectional area than the inner cavity 30.

<4.1> Force conversion mechanism

The sealant 20 is formed by the inner cavity 30, the outer cavity 31, the beam 26, the inner pillar 27, the intermediate pillar 28, and the outer pillar 29, so that the peeling force generated outside the sealant 20 can be converted into a seal when the joint is fitted. The conversion mechanism of the force of the adhesive material 20.

<4.2> Beam

The beam 26 is laterally located between the plurality of lips 25a-25c and the side-by-side voids 30, 31 and has a uniform thickness t.

The inner end, the intermediate portion, and the outer end of the beam 26 are each connected to the top of the inner leg 27, the center post 28, and the outer leg 29.

<4.3> Inner and outer pillars

The inner leg 27 and the outer leg 29 are located at both ends of the beam 26 for supporting the beam 26.

The inner pillar 27 and the outer pillar 29 have a uniform thickness in the cross section, and have a thickness and an elastic force which are less likely to cause buckling deformation when the joint is fitted.

<4.4> Middle pillar

The center post 28 is located offset from the center of the beam 26 toward the inside to support the beam 26. The center pillar 28 also has a thickness and an elastic force which are less likely to cause buckling deformation when the joint is fitted.

The thickness of the cross section of the center pillar 28 is gradually increased from top to bottom, and the outer side surface 28a of the center pillar 28 is vertical, and the inner side surface 28b is inclined.

In other words, the thickness of the outer side of the center pillar 28 is unchanged, but the thickness of the inner side of the center pillar 28 is gradually increased from the upper (free end) to the lower (bottom end).

The intermediate pillar 28 has a slightly tapered cross section, and only the inner side surface 28b is inclined, whereby the opposing force (elastic force) of the external force applied to the center pillar 28 can be applied to the beam 26 when the joint is fitted. Direction (reverse direction of the direction of action of the peeling force F).

The height of the outer side surface 28a of the center pillar 28 is higher than the height of the inner side surface 29a of the outer pillar 29.

<4.5> Inside cavity

The inner cavity 30 is a space in which the bottom surface 26a of the cross member 26, the outer side surface 27a of the inner pillar 27, and the inclined side surface 28b of the inner pillar 28 are surrounded by a slightly triangular cross section.

<4.6> Outside cavity

The outer cavity 31 is a space in which the bottom surface 26a of the cross member 26, the outer side surface 28a of the center pillar 28, the inner side surface 29a of the outer pillar 29, and the inclined bottom surface 22a between the two pillars 28 and 29 are surrounded by a slightly triangular or deformed quadrangle.

The bottom faces 26a, 26a of the beams 26 corresponding to the top faces of the two voids 30, 31 are located on the same horizontal line.

The sealing material 20 of the present invention has no difference in appearance from the conventional outer shape, but the internal structure of the sealing material 20 is improved by forming a plurality of voids, so that the peeling force generated by the sealing material 20 can be converted when the joint is fitted. The fixing force of the sealing material 20 is formed.

Therefore, it is not necessary to attach other additional components, and no additional extra is required when manufacturing the sealing material 20. machining.

<5>The embedded structure of the sealant

The second drawing of the male connector 10 is indicated by a double-dot chain line to further explain the sealing structure of the sealing material 20.

When the sealant 20 and the pipe are formed simultaneously with the pipe joint 10, the mounting portion 21 is fitted.

The fitting portion 21 exposes only the surfaces of the inner and outer flanges 23a, 23b, and the bottom portions of the two flanges 23a, 23b are embedded in the body of the male connector 10.

The bottom portion 22 of the fitting portion 21 and the outer peripheral surface of the engaging groove 24 are in close contact with the joint body to form a fitting form commonly known as "dovetail groove", thereby enhancing the fixing force of the insert portion 21, and more only The enlarged sealing area enhances its water repellency.

〔effect〕

Next, referring to Figs. 3 and 4, a joint portion pattern diagram in which the male connector 10 and the female connector 11 are fitted in the inner sleeve is used to explain the action of preventing the sealant from everting. Fig. 3 discloses the joint portion at the time of preliminary fitting, and Fig. 4 discloses the joint portion at the time of completion of the fitting.

When the inner sleeve is fitted with the two joints 10 and 11, the peeling force F generated outside the sealing material 20 can be converted into the fixing force of the sealing material 20. The following is a description of the force conversion mechanism.

<1> Elastic deformation of the lip

In Fig. 3, in order to ensure water repellency, the gap formed between the two joints 10, 11 is smaller than the protruding length of the water sealing portion 25 of the sealant 20.

According to the above premise, if the inner fitting 10 and the female connector 11 are fitted, the plurality of lips 25a to 25c constituting the sealing material 20 have their free ends pressed against the inner peripheral surface of the female connector 11 and are elastically deformed in sequence.

<2> Elastic deformation of the beam

With the elastic deformation of the plurality of lips 25a to 25c, the peeling force F (outer tilting force) is generated outside the fitting portion 21 of the sealing material 20, and the beam 26 as a whole generates a pressing force f ₁ toward the bottom portion 22.

The three pillars 27 to 29 of the support beam 26 are supported by the intermediate pillars 28 at positions where the center of the beam 26 is offset toward the inside.

Therefore, although the dispersing pressing force f ₁ is generated on the two side cross members 26 spaced apart from the center post 28, the cross member 26 located between the intermediate strut 28 and the outer leg strut 29 causes a large amount of elastic deformation toward the bottom portion 22.

The beam 26 located between the inner pillar 27 and the intermediate pillar 28 is hardly elastically deformed or only slightly elastically deformed.

The beam 26 located between the middle pillar 28 and the outer pillar 29 causes a large amount of elastic deformation, because the beam 26 located between the two is opposite to the overall length of the beam 26, and the length of the beam is long and the pressure is long. The resultant force f ₁ has a large dispersing power.

In other words, the beam 26 with the intermediate pillars 28 is spaced apart from the inner beam of the beam 26 spaced apart by the intermediate pillars 28, so that the outer side of the beam 26 is easily deformed, and the outer side of the beam 26 is prone to local load.

The beam 26 located between the inner pillar 27 and the middle pillar 28 has almost no elastic deformation, because the length of the beam is shorter than the overall length of the beam 26, and the pressing force f ₁ has a small dispersion force. The reason.

<3> Force conversion

The pressing force f ₁ acting on the entire beam 26 is finally transmitted to the three pillars 27 to 29, and then the force and the force are converted as described below.

In order not to make the center pillar 28 due to the pressure force f ₁ buckling deformation is generated, which cross-sectional side thickness increasing from top to bottom lines.

Therefore, the pressing force f1 generated by the beam 26 is converted into the elastic force (reverse force) e _{1 of the} intermediate stay 28, and the converted elastic force (reverse force) e ₁ changes the direction and shifts the beam 26 toward the outside.

In other words, the cross-sectional shape is the intermediate strut 28 which is inclined upward toward the outer side and is slightly tapered. The elastic force e _{1 does} not act directly above the figure, but limits the direction of action of the elastic force e _{1 to} the upper left oblique direction.

The direction restriction of the elastic force e ₁ is greatly related to the cross-sectional shape of the intermediate strut 28 and the shape of the inner cavity 30.

For example, if the intermediate pillar 28 has a cross-sectional shape such that the inner pillar 27 has a uniform thickness and the inner cavity 30 has a quadrangular shape, a circular shape or an elliptical shape, the elastic force e ₁ cannot be restricted to a specific direction.

The cross-sectional shape of the intermediate pillar 28 and the shape of the inner cavity 30 are based on the results of various combinations of experiments.

<4> Formation of fixation force

As shown in FIG. 4, in addition to its role in elastic e ₁ 28 outside the center pillar brace 26 for elastic deformation of the cross member 26 itself also generates an elastic force e _2.

As a result, the two elastic forces e ₁ , e ₂ act toward the outer leg 29 .

These forces acting toward the outer leg 29 are the force (fixing force) f _{2 that} presses the outer leg 29 against the body of the male connector 10.

In other words, with respect to the generated fixing force f ₁ , the elastic force e ₁ acts on different positions, thereby generating the fixing force f ₂ to form the rotational moment in the counterclockwise direction of rotation in FIG. 4 . The fixing force f ₂ acts in the opposite direction to the peeling force F (clockwise rotation in Fig. 4), so that the outer side of the sealant 20 can be prevented from being warped.

Through the above-described force conversion mechanism, the outer side of the insertion portion 21 includes the outer flange 23b, and can be strongly pressed into the body of the male connector 10.

The force (fixing force) f ₂ that presses the outer leg 29 into the body of the male joint 10 is also greatly related to the cross-sectional shape of the center pillar 28 and the shape of the outer cavity 31.

For example, if the middle pillar 28 has a cross-sectional shape such that the inner pillar 27 has a uniform thickness, and the inner cavity 30 and the outer cavity 31 have a quadrangular shape, a circular shape or an elliptical shape, the fixing force f ₂ cannot be restricted to a specific direction. .

The cross-sectional shape of the intermediate pillar 28 and the shape of the outer cavity 31 are based on the results of various combinations of experiments.

In the present invention, by the above-described force conversion mechanism, the external force acting on the sealant 20 is finally converted into the fixing force f _{2 of the} sealant 20, and the outer warping of the outer side of the insert portion 21 can be effectively and surely prevented.

Further, since the fixing force f ₂ strengthens the pressing force between the fitting portion 21 and the body of the male joint 10, the sealing property between the fitting portion 21 and the body of the male joint 10 can be further enhanced.

Further, the sealing member 20 is not restricted to the above-described form by the fitting portion 21, and a well-known form can be used.

Further, in addition to making the overall hardness of the sealant 20 uniform, the insert portion 21 and the water stop portion 25 may have different hardnesses.

10‧‧‧ Male connector

11‧‧‧Female connector

20‧‧‧ Sealing material

21‧‧‧ Sealing material in the embedded part

22‧‧‧ bottom

23a‧‧‧Inside flange

23b‧‧‧ lateral flange

24‧‧‧ snap groove

25‧‧‧ Sealing material, its water stop

25a‧‧‧ inside lip

25b‧‧‧Intermediate lip

25c‧‧‧Outer lip

26‧‧‧ beams

27‧‧‧ inside pillar

28‧‧‧ middle pillar

29‧‧‧Outer pillar

30‧‧‧ inside cavity

31‧‧‧Outside cavity

[Fig. 1] A perspective view of a sealant of the present invention.

[Fig. 2] An enlarged sectional view of the sealant.

[Fig. 3] A cross-sectional view of the joint portion at the time of preliminary fitting.

[Fig. 4] A cross-sectional view of the joint portion after fitting.

[Fig. 5] An explanatory view of a conventional sealant, wherein (a) is a cross-sectional view of the sealant before fitting, and (b) is a cross-sectional view of the sealant at the time of fitting.

10‧‧‧ Male connector

20‧‧‧ Sealing material

21‧‧‧ embedded department

22‧‧‧ bottom

23a‧‧‧Inside flange

23b‧‧‧ lateral flange

24‧‧‧ snap groove

25‧‧‧Water Stop

25a‧‧‧ inside lip

25b‧‧‧Intermediate lip

25c‧‧‧Outer lip

26‧‧‧ beams

27‧‧‧ inside pillar

28‧‧‧ middle pillar

29‧‧‧Outer pillar

30‧‧‧ inside cavity

31‧‧‧Outside cavity

Claims (5)

A sealing material for a pipe channel, comprising an embedding portion embedded in a joint and having at least one bottom portion, and a water stopping portion, wherein the water stopping portion is provided with a plurality of lips side by side and the embedding portion The integral shape is characterized in that: an inner cavity and an outer cavity have a thickness spanning between the water stop portion and the insert portion, and the inner cavity and the outer cavity are laterally juxtaposed; a beam formed on the plurality of lips a groove between the bottom of the portion and the inner cavity and the outer cavity; and an inner pillar, a middle pillar and an outer pillar, the inner pillar, the middle pillar and the outer pillar are formed between the beam and the bottom; wherein An inner cavity is located between the inner pillar and the middle pillar; the outer cavity is located between the middle pillar and the outer pillar; by the inner cavity, the outer cavity, the beam, the inner pillar, the middle pillar and the outer side The pillar is a conversion mechanism that converts the peeling force generated on the outer side of the sealant into a force of the sealant when it is formed in the fitting joint. The sealing material for a canal according to the first aspect of the invention, wherein the intermediate pillar is disposed at a position offset from the center of the beam toward the inner side, and the thickness of the intermediate pillar is gradually increased from a free end toward a bottom end. thick. The sealing material for a canal of the first or the second aspect of the patent application, wherein the inner cavity and the outer cavity have a slightly triangular cross-sectional shape, and the outer cavity is larger than the inner cavity. A sealing material for a canal according to any one of items 1 to 3 of the patent application, wherein the The lip portion is composed of an inner lip portion, an intermediate lip portion and an outer lip portion. The sealing material for a canal according to any one of the items 1 to 3, wherein the two sides of the fitting portion form a V-shaped engaging groove.