CN104930192A - t-shaped rubber ring and plant fiber reinforced cement pipe - Google Patents

Abstract

The invention relates to a t-shaped rubber ring. The t-shaped rubber ring is characterized by comprising a rubber ring body with a t-shaped cross section, the rubber ring body comprises a convex arc, a boss and an inner oblique plane, the connecting position of the convex arc and the outer side of the boss is inwards sunken to form a concave arc, and the convex arc and the inner side of the boss are inner oblique planes. The farthest points of the outer side face of the boss and the outer side of the convex arc are located on the same plane, the upper end of the inner oblique plane and the farther point of the inner side of the convex arc are connected, and the lower end of the inner oblique plane is connected with the bottom face of the boss. The t-shaped rubber ring is obtained by according to the stability of a circle and double-circle structure change. The concave arc enables the t-shaped rubber ring to form an airtight cavity when the t-shaped rubber ring is used, and further the sealing performance of the t-shaped rubber ring is improved. In addition, after the convex arc and the boss are extruded, and the contact areas of the t-shaped rubber ring and the pipe wall are identical, so that the t-shaped rubber ring is kept stable structurally.

Description

T type rubber ring and vegetable fiber refinforced cement pipe

Technical field

The present invention relates to engineering construction field, be specifically related to a kind of t type rubber ring and vegetable fiber refinforced cement pipe.

Background technique

Vegetable fiber refinforced cement pipe makes the main material of power cable engineering, road and bridge engineering and construction engineering.The usual direct-burried of vegetable fiber refinforced cement pipe, in underground, for threading cable, plays the effect of protection cable; Also can be used for draining blowdown.Conveniently transport, vegetable fiber refinforced cement pipe is generally multi-segment structure, then splice in use, current connecting method mostly is docking or connects, the sealing of joint often can not be guaranteed, moisture and other liquid easily infiltrate in pipeline, thus cause certain pollution and corrosion to the cable in pipeline; If during for draining blowdown, the sewage in pipeline easily leaks outside, and the strength of every segment pipe is different, easily causes at pipeline junction and breaks, greatly reduce the working life of vegetable fiber refinforced cement pipe.

Generally at present arrange o type rubber ring to increase its sealing in vegetable fiber refinforced cement pipe stitching portion, the seal action of this o type rubber ring is mainly borrowed precompression when installing and operationally by the pressure of working medium, the distortion of o type rubber ring is reached; When ensureing its sealing of rubber ring, the compressibility after its installation will be noted.Compressibility refers to that o type rubber ring is after installing and using, because being squeezed, and the compression deformation rate that cross section produces.

Though the sealing of pipeline stitching portion increases after using o type rubber ring, its sealability is still short of to some extent, still can not ensure the required sealed environment of cable.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of t type rubber ring, and it adopts t type structure, and can form sealed cavity after compression, sealability is preeminent.

In order to solve the problems of the technologies described above, the technical solution used in the present invention is, a kind of t type rubber ring, its structural feature is, comprise the rubber ring body that cross section is t type, this rubber ring body comprises convex arc, boss and interior inclined-plane, and the joint, outside of described convex arc and boss caves inward formation concave arc, and is interior inclined-plane inside convex arc and boss; Outside described boss outer side surface and convex arc, solstics at grade, and upper end, described interior inclined-plane is connected with solstics inside convex arc, and lower end is connected with boss bottom surface.

Further, described convex arc radius is R, and the length of rubber ring body is 3R, and the length of described boss is R-135%R, and its bottom surface width is 145%R-175%R.

Further, the compressibility of described t type rubber ring is 14%-27%.Show that rubber ring its sealability within the scope of this compressibility is better by contrast experiment's data.

Further, the length of described boss is 120%R, and its bottom surface width is 160%R.Boss adopts sealability when changing size best.

T type rubber ring obtains according to two circle structural change of intersecting, and because circle has good stability, thus the stability of the t type rubber ring of the present invention is stronger.And after the compression of t type rubber ring, concave arc and tube wall can form an airtight cavity, make rubber ring remain on the state of squeezed tight, strengthen the sealing of rubber ring further.And land length and convex arc compress identical with the area of contact of tube wall afterwards, further ensure t type rubber ring stability in use.On t type rubber ring in inclined-plane be arranged so that simple and convenient when mounted.

Present invention also offers a kind of vegetable fiber refinforced cement pipe, its structural feature is, comprises sleeve pipe, interior pipe and t type rubber ring as above.

Further, be provided with a groove in described sleeve pipe, this groove arranged rubber ring body, described interior pipe is arranged in sleeve pipe, and with rubber ring body contacts.

Further, the recess width in described sleeve pipe is equal with boss bottom surface width, and value is 145%R-175%R, and this groove length is equal with rubber ring body length, and value is 3R.

Further, described casing inner diameter is D, and described interior pipe external diameter value is in the scope of D-27%R to D-14%R.

Compared with prior art, the t type rubber ring of the present invention, according to the stability of circle, obtains via two round structural change, has good stability.In the present invention, the t type that the is arranged so that rubber ring of concave arc can form airtight cavity in use, makes t type rubber ring stress equalization, can strengthen its sealing; In addition, at the upper and lower convex arc of seal chamber and boss after extrusion, it is identical with the area of contact of tube wall, makes t type rubber ring structure remained stable.And groove length in sleeve pipe and width are all according to the size design of t type rubber ring, and the setting of interior pipe external diameter further ensures the compressibility scope of t type rubber ring, makes it have good sealing.

Accompanying drawing explanation

Fig. 1 is the t type rubber ring structural representation of the present invention.

Fig. 2 is the t type rubber ring sectional view of the present invention.

Fig. 3 is the vegetable fiber refinforced cement tubular construction schematic diagram of the present invention.

Fig. 4 is the sleeve structure schematic diagram of the present invention.

Fig. 5 is the t type rubber ring cross sectional representation of the present invention.

Embodiment

For the technology contents of detailed the present invention, structure characteristic, institute reach object and effect, below will exemplify embodiment and coordinate Figure of description to be described in detail.

With reference to the t type rubber ring structural representation shown in Fig. 1 and t type rubber ring sectional view, t type rubber ring comprises the rubber ring body 1 that cross section is t type, this rubber ring body 1 comprises convex arc 11, boss 13 and interior inclined-plane 14, wherein convex arc 11 caves inward with the joint, outside of boss 13 and forms concave arc 12, and is interior inclined-plane 14 inside convex arc 11 and boss 13; Outside boss 13 outer side surface and convex arc 11, solstics at grade, and upper end, interior inclined-plane 14 is connected with solstics inside convex arc 11, and lower end is connected with boss 13 bottom surface.

In the present invention, convex arc 11 radius is R, and the length of rubber ring body 1 is 3R, and the length of boss 13 is R-135%R, and its bottom surface width is 145%R-175%R, and the compressibility value of the t type rubber ring of the present invention is 14%-27%; When the compressibility of rubber ring is 20%, boss 13 length gets 120%R, and its bottom width is 160%R, and now sealing effect is best.

With reference to the vegetable fiber refinforced cement tubular construction schematic diagram shown in Fig. 3 and the sleeve structure schematic diagram shown in Fig. 4, present invention also offers vegetable fiber refinforced cement pipe, it comprises sleeve pipe 3, interior pipe 2 and t type rubber ring as above.In sleeve pipe 3, be provided with a groove 31, this groove 31 arranges rubber ring body 1, and interior pipe 2 be arranged on sleeve pipe 3, contacts with rubber ring body 1.

Groove 31 width in middle sleeve 3 of the present invention is equal with boss 13 bottom surface width, and value is 145%R-175%R, and this groove 31 length is equal with rubber ring body 1 length, and value is 3R; Sleeve pipe 3 internal diameter is D, and interior pipe 2 external diameter value is in the scope of D-27%R to D-14%R.

Compressibility value in the t type rubber ring of the present invention is 14%-27% is the experimental result obtained by many experiments.Test the data obtained as follows:

Table 1

Table 2

Can learn from table 1, when rubber ring is applied in plant fiber-cement pipe, along with the increase of rubber ring compressibility, its sealability is better, but when compressibility is greater than 35%, its sealing will be deteriorated; Can learn from table 2, when rubber ring is applied in plant fiber-cement pipe, rubber ring compressibility lower than 24% time, the shape of rubber ring is normal; When rubber ring compressibility higher than 24% lower than 27% time, rubber ring can deform but can recover; And rubber ring compressibility more than 30% time, rubber ring will deform and its shape can not be recovered, and even phenomenon of rupture can occur.

In sum, the compressibility value of t type rubber ring of the present invention should be 14%-27%, and when compressibility is 20%, its sealability is best.

With reference to shown in Fig. 5, t type rubber ring of the present invention obtains according to two circle structural change of intersecting, and has good stability.In order to make the structure of t type rubber ring more stable, length and the bottom surface width thereof of the boss 13 on rubber ring body 1 calculate through certain.Specifically be calculated as follows:

As shown in Figure 5, in t type rubber ring, convex arc 11 compresses contact length that is rear and tube wall is L, and convex arc 11 Extreme breadth after compression is K; And the length of boss 13 is l, its bottom width is k; Interior pipe 2 compressing rubber circle body 1 distance that is rear and sleeve pipe 3 inwall is d.The compressibility of t type rubber ring is 14%-27%, and the present invention is the length and its bottom width that set boss 13 according to the compressibility of t type rubber ring, convex arc 11 is equal with the area of contact of tube wall with boss 13 with tube wall area of contact upon compression to make rubber ring body 1, and then strengthens the stability of t type rubber ring.

When t type rubber ring compressibility E gets 14%, convex arc 11 Extreme breadth K=2R (1-E)=2R (1-14%)=172%R, convex arc 11 with the contact length of tube wall is $L=2\×$ $\sqrt{R^2-{\left(\frac{K}{2}\right)}^2}=2\×\sqrt{R^2-{(86\%R)}^2}=102.06\%R,$ For ensureing stability and the sealing thereof of t type rubber ring, l value is 102.06%R, k value is 172%R.

Now after interior pipe 2 compressing rubber circle body 1 and the distance of sleeve pipe 3 inwall $d=$ $(2R-\frac{2\mathrm{RE}}{2})-k=2R-\mathrm{RE}-k=2R-14\%R-172\%R=14\%R$

When t type rubber ring compressibility E gets 27%, convex arc 11 Extreme breadth K=2R (1-E)=2R (1-27%)=146%R, convex arc 11 with the contact length of tube wall is $L=2\×\sqrt{R^2-{\left(\frac{K}{2}\right)}^2}=2\×\sqrt{R^2-{(73\%R)}^2}=136.69\%R,$ For ensureing stability and the sealing thereof of t type rubber ring, l value is 136.69%R, k value is 146%R.

Now after interior pipe 2 compressing rubber circle body 1 and the distance of sleeve pipe 3 inwall $d=$ $(2R-\frac{2\mathrm{RE}}{2})-k=2R-\mathrm{RE}-k=2R-27\%R-146\%R=27\%R$

According to foregoing, the length value of boss 13 should be 102.06%R-136.69%R, and its bottom width answers value to be 146%R-172%R, but conveniently gets its approximative value to design, i.e. boss 13 length value R-135%R, its bottom width is 145%R-175%R.

According to after interior pipe 2 compressing rubber circle body 1 and the value of distance d of sleeve pipe 3 inwall and the value of sleeve pipe 3 internal diameter D can to obtain interior pipe 2 external diameter be D-d, thus the span drawing interior pipe 2 internal diameter is D-27%R to D-14%R.

When t type rubber ring wants shrinkage to be 20%, its sealability is best, and now t type rubber ring boss 13 length value is 120%R, and its bottom width value is 160%R, and interior pipe 2 external diameter value is D-20%R.

Content is only the preferred embodiment of the present invention in sum, does not limit the protection domain of patent of the present invention with this, and all equivalences done according to the scope of the claims of the present invention and description change and modify, all within the protection domain of patent of the present invention.

Claims (8)

1. a t type rubber ring, it is characterized in that: comprise the rubber ring body (1) that cross section is t type, this rubber ring body (1) comprises convex arc (11), boss (13) and interior inclined-plane (14), described convex arc (11) caves inward with the joint, outside of boss (13) and forms concave arc (12), and convex arc (11) and boss (13) inner side are interior inclined-plane (14); Described boss (13) outer side surface and solstics, convex arc (11) outside are at grade, and described interior inclined-plane (14) upper end is connected with solstics, convex arc (11) inner side, lower end is connected with boss (13) bottom surface.

2. t type rubber ring according to claim 1, it is characterized in that: described convex arc (11) radius is R, the length of rubber ring body (1) is 3R, and the length of described boss (13) is R-135%R, and its bottom surface width is 145%R-175%R.

3. t type rubber ring according to claim 1, is characterized in that: the compressibility of described t type rubber ring is 14%-27%.

4. t type rubber ring according to claim 1, is characterized in that: the length of described boss (13) is 120%R, and its bottom surface width is 160%R.

5. a vegetable fiber refinforced cement pipe, is characterized in that: comprise sleeve pipe (3), interior pipe (2) and t type rubber ring as claimed in claim 2.

6. vegetable fiber refinforced cement pipe according to claim 5, it is characterized in that: in described sleeve pipe (3), be provided with a groove (31), this groove (31) is arranged rubber ring body (1), described interior pipe (2) is arranged in sleeve pipe (3), and contacts with rubber ring body (1).

7. vegetable fiber refinforced cement pipe according to claim 5, it is characterized in that: groove (31) width in described sleeve pipe (3) is equal with boss (13) bottom surface width, value is 145%R-175%R, this groove (31) length is equal with rubber ring body (1) length, and value is 3R.

8. vegetable fiber refinforced cement pipe according to claim 6, is characterized in that: described sleeve pipe (3) internal diameter is D, and described interior pipe (2) external diameter value is in the scope of D-27%R to D-14%R.