CN88203663U

CN88203663U - Prefabricated concrete multi-holes cable fitting

Info

Publication number: CN88203663U
Application number: CN 88203663
Authority: CN
Inventors: 李世龙; 骆静进
Original assignee: Suzhou Research Inst Of Concrete And Cement Products Of National Bureau Of Buil
Current assignee: Suzhou Research Inst Of Concrete And Cement Products Of National Bureau Of Buil
Priority date: 1988-03-01
Filing date: 1988-03-01
Publication date: 1988-12-21

Abstract

The utility model relates to a prefabricated concrete multi-holes leading pipe. The pipe body of the leading pipe and the profile cross-section of the pipe opening of the leading pipe are in rectangle, and the four corners of the leading pipe are in arc. The sectional planes of a bearing and an inserting openings are in trapezium, and the bearing opening is connected with the inserting opening by a thooth-shaped sealing ring. Small teeth on the thooth-shaped sealing ring are pressed and deformed to form a plurality of channels ' fencings' in the process of the inserting opening going into the bearing opening in order to prevent water from going into or overflowing the pipe so that the effect of sealing is achieved. The utility model is adopted so that the equipment and the moulding technology of the pipe are simplified, and the manufacturing cost and the manufacturing period are reduced. The thooth-shaped sealing ring is adopted so that the effect of sealing is improved, and the rupturing of the bearing opening which is resulted from exceeding a position in assembly process is prevented.

Description

Prefabricated concrete multi-holes cable fitting

The invention belongs to the precast unit field.

The concrete multiholed catheter is the important composition part of undergroundization of urban distribution network, can be used for the protective casing of underground communication cable, power cable or similar products.It act as and prevents the groundwater erosion cable, guarantees that circuit is unimpeded.At present, undergroundization of urban distribution network is quite universal abroad.China Beijing, metropolis such as Shanghai are at the early-stage, most of, adopt single hole asbestos pipe and single hole concrete pipe, United States Patent (USP) 2994119 has been introduced the enhancing sealing ring of a kind of spigot-and-socket concrete multiholed catheter and joint, the conduit exterior cross-section of this patent introduction is standard rectangular, bellmouth inner surface and socket external surface all have step, and overcoat plastic sheath, to avoid joint in connection procedure, to damage, sealing ring is the wedge-shaped rubber ring, the centre has a steel to strengthen ring, holds, when socket connected, step played the role of positioning, packer ring is stuck on the step, thereby reach the purpose of sealing, the bell and spigot moulding complexity of above-mentioned form need be purchased special-purpose machines and tools and special equipment, the making of wedge-shaped rubber ring also needs particular manufacturing craft and equipment, and the cost of manufacture height, fabrication cycle is longer.The purpose of this utility model is the bell and spigot moulding complexity at existing precast concrete multiholed catheter, and sealing is with wedge-shaped rubber ring cost of manufacture and require high.Weak points such as the profile of multiholed catheter is fragile and a kind of improved precast concrete multiholed catheter that proposes, it can simplify the moulding process of concrete multiholed catheter, reduces cost, shortens Production Time, improves output and good sealing effect.

The purpose of this utility model is to realize like this, owing to cancelled the platform valency of bellmouth inner surface and socket external surface, thereby simplified the moulding process of multiholed catheter, adopted the profile of tooth sealing ring to replace plastic sheath and wedge shape sealing ring, reduce cost of manufacture and requirement, and improved sealing effectiveness.

Conduit profile of the present utility model is that the cross section is rectangular, its four jiaos is arc, arc radius R is conduit endoporus half hole r and a sum, the bell and spigot profile of conduit is identical with the catheter tube body contour, the pipe range direction cross section of bellmouth inner surface and socket external surface is trapezoidal, and its angle of gradient α is 3～8 °, and β is 1～6 °, sleeving plastic sheath not on the bell and spigot, straight forming on mould.Sealing between the bell and spigot, adopt the profile of tooth sealing ring, the section of profile of tooth sealing ring is the L type, have two to five zigzag or circle obtuse angle shape little tooth on the long limit of L type, the minor face place is enclosed within on the socket end facade as straight bearing surface, and the little tooth on the sealing ring enters compressive deformation in the process of bellmouth at socket, form multiple tracks " fence ", when joint bears inside and outside hydraulic action, prevent that current from overflowing or enter pipeline, thereby reach sealing effectiveness.

The utility model adopts four jiaos be the pipe shaft of arc and the mouth of pipe and trapezoidal hold, the socket shape, simplified the moulding process equipment of conduit, and adopt the profile of tooth sealing ring to replace plastic sheath and wedge shape sealing ring, then reduced cost of manufacture, improved sealing effectiveness simultaneously, and can prevent to cross when installing bellmouth that the position causes and break and distortion to cushion rubber is installed, displacement, the form of this joint not only can be used for the connection of multiholed catheter, also can be used for the demanding pipeline of other watertightness and connect, of many uses.

Fig. 1 is the prior art schematic diagram, and ［ 1 ］ is that bellmouth, ［ 2 ］ are socket, and ［ 3 ］ are packer ring.

Fig. 2 is the mouth of pipe sectional view of prior art.

Fig. 3 is the wedge-shaped rubber ring, and ［ 4 ］ are that rubber strip, ［ 5 ］ strengthen ring for steel.

Fig. 4 is a schematic diagram of the present utility model, and ［ 6 ］ are socket, and ［ 7 ］ are bellmouth, and ［ 8 ］ are the profile of tooth sealing ring, and ［ 9 ］ are pipe shaft.

Fig. 5 is mouth of pipe exterior cross-section figure of the present utility model.

Fig. 6 is the profile of tooth sealing ring.

Most preferred embodiment of the present utility model is precast concrete four hole conduits, and the pipe shaft cross section is square, the endoporus radius r is 75mm, wall thickness a27mm, and arc footpath R is 75+27=103mm around the pipe shaft.The inner surface angle of gradient α of bellmouth is 6 °, socket external surface angle of gradient β=3 °.

L type profile of tooth sealing ring is adopted in the connection of bell and spigot, and the sawtooth number is four.Its material can be rubber etc.

When bell and spigot connects, the L RunddichtringO is enclosed within on the socket, minor face is fixed on the socket end face, along the pipe shaft axis direction socket is pushed in the bellmouth then, installs when the profile of tooth sealing ring all enters bellmouth.

Claims

1, a kind of precast concrete multiholed catheter, the bellmouth of concrete multiholed catheter [7] is connected by sealing ring with socket [6].The invention is characterized in that pipe shaft [9] and mouth of pipe exterior cross-section are rectangle, Qi Sijiao is curved, and bellmouth [7] inner surface and socket [6] external surface section all are trapezoidal, and profile of tooth sealing ring [8] is adopted in the sealing of joint.

2, concrete multiholed catheter as claimed in claim 1 is characterized in that four jiaos of radian sums in pipe shaft and mouth of pipe cross section are 2 π, and arc radius R is conduit endoporus radius r and wall thickness a sum R=r+a.

3, concrete multiholed catheter as claimed in claim 1, the angle of gradient α that it is characterized in that the bellmouth inner surface are that 3～8 ° of the bests are 6 °; The gradient β of socket external surface is 1～6 °, and the best is 3 °.

4, concrete multiholed catheter as claimed in claim 1, the section that it is characterized in that described profile of tooth sealing ring is L shaped, L shaped minor face place is enclosed within the straight bearing surface of conduct on the socket end facade, has two to five zigzag or the little tooth of obtuse angle, garden shape on the long limit.