CN2661748Y

CN2661748Y - Plastic casing for concrete sleeper

Info

Publication number: CN2661748Y
Application number: CN 03226861
Authority: CN
Inventors: 肖鹏; 李名章; 刘亚庆; 石建江
Original assignee: Zhuzhou Times New Material Technology Co Ltd
Current assignee: Zhuzhou Times New Material Technology Co Ltd
Priority date: 2003-01-23
Filing date: 2003-01-23
Publication date: 2004-12-08
Anticipated expiration: 2013-01-23

Abstract

The utility model relates to a plastic bushing for concrete sleepers, which is embedded in the spike fixing hole of the sleepers. The plastic bushing is provided with two types of threads inside and outside, wherein, the inside thread of the plastic bushing fitted with the spike is a serrated single start beveled thread and the beveled edge of the thread is large bevel; the fit between the plastic bushing and the spike is loose fit, which optimizes the strained condition of the plastic bushing and the components, so as to improve the service life the plastic bushing and the components greatly; the outside thread of the plastic bushing fitted with the concrete sleepers is thread groove, which is provided with a thread pitch corresponding with the inner thread, and according to the road condition the outside thread can be full thread or partial thread; two transversal bosses can also be arranged at two ends of the plastic bushing, which are provided with a patch hole each one, being convenient to be inserted by the reinforcement when embedded, so as to improve the pull-out resistance of the bushing to the sleeper. Both inside and outside of the bushing are provided with thread structures and the two threads with uniform pitches are arranged in transplacements. The bushing and the concrete sleeper are connected with each other as a whole tightly by the outside thread; the bushing and the spike are tightly connected to each other as a whole by the inside thread through the elastic deformation of the plastic bushing.

Description

The concrete sleeper plastic bushing

Technical field

The utility model relates to a kind of railway sleeper accessory, is mainly used in the fixedly railway spike of sleeper, keeps being fastenedly connected between concrete sleeper and the rail.

Background technology

China's prestressed reinforced concrete tie from research, produce and apply, last 40 surplus year, output exceedes hundred million, lays mileage and reaches 70,000 kilometers.The prestressed reinforced concrete tie of China railways use at present is divided into two classes, and a class is the non-shoulder concrete sleeper; Another kind of is that the shoulder block concrete sleeper is arranged, and wherein the connected mode of non-shoulder concrete sleeper rail and sleeper adopts the sulfur cement mortar anchorage mode always.In long-term use, the intrinsic defective of sulfur cement mortar anchorage technology exposes more and more obviously, causes sleeper cracking rate height owing to sulfur cement mortar anchorage because of expansion as (1); (2) the sulphur heating and melting produces a large amount of SO2 gas in the work progress, to environment and constructor's health generation harm greatly; (3) adopt the sulfur cement mortar anchorage mode, railway spike and nut separate, so often oiling can turn with the assurance nut for the binding site of railway spike and nut.Therefore, it is very necessary developing a kind of novel rail railway spike and the fixed form of sleeper.

Summary of the invention

The purpose of this utility model is to design a kind of plastic bushing, by plastic bushing is embedded in the concrete sleeper in advance, changes the connected mode of railway spike and sleeper, makes it easy to construction, pollution-free and can prolong sleeper application life.

The utility model is to start with from optimizing the plastic whorl structure, develops a kind of concrete sleeper plastic bushing, makes the fixed form of railway spike and sleeper satisfy the instructions for use of circuit operating mode.This purpose is achieved by following technical proposals: a pre-buried plastic bushing in the railway spike fixing hole of sleeper all has screw thread inside and outside the plastic bushing.(1) screw thread that plastic bushing and railway spike are matched is jagged PDX screw thread, and the hypotenuse of screw thread is big oblique angle, and the angle of hypotenuse and thread segment is 30 °-45 °, and cooperating between plastic bushing and the railway spike is a kind of loose fit.Key problem in technology of the present utility model is determining of plastic bushing and assembly helicitic texture thereof, makes the force-bearing situation of plastic bushing and assembly thereof be in the best, thereby prolongs the application life of plastic bushing and assembly thereof significantly.(2) plastic bushing is pitch and the consistent thread groove of internal thread with the external screw thread of concrete sleeper combination, requires difference according to road conditions, can select full thread or half-thread form for use.Simultaneously can also respectively add a horizontal boss, be provided with patchhole in the boss, be convenient to insert reinforcing bar when pre-buried, to improve the uplift resistance of sleeve pipe sleeper at the two ends up and down of sleeve pipe.(3) all have helicitic texture inside and outside this sleeve pipe, internal thread and external screw thread are that the dislocation uniform pitch is arranged.External screw thread tightens together sleeve pipe and concrete sleeper to become one, and internal thread makes railway spike closely be connected with sleeve pipe by the elastic deformation of plastics.

The utility model purpose design feature is: (1) female thread structure is " a class triangle ", and the assembly internal thread mainly bears action of compressive stress, avoid material generation shear failure, (2) external screw thread is looked concrete circuit working condition, can adopt full thread, full thread to add up and down laterally boss or half-thread and add up and down laterally different structures such as boss, external screw thread adds up and down the laterally combination of boss, increased novel plastic sleeve pipe and concrete adhesive strength, thus the application life of having improved concrete sleeper and assembly thereof.

Because this use is novel to be a pre-buried plastic bushing in the railway spike fixing hole of sleeper, this structure is in work progress, directly sleeve pipe is embedded in advance among the sleeper, the pollution of avoiding the sulfur cement mortar anchorage structure in work progress, environment to be caused, eliminated the sleeper cracking that expands and cause because of sulfur cement mortar anchorage simultaneously, adopt the helicitic texture of optimizing, improve the intensity of plastic bushing and assembly thereof, integral body has improved the application life of sleeper.

Accompanying drawing and description of drawings

Fig. 1, be structural representation of the present utility model;

Fig. 2, be another embodiment of the present utility model;

Fig. 3, be another embodiment of the present utility model;

Fig. 4, be the partial enlarged drawing of the utility model internal thread;

Fig. 5, be user mode figure of the present utility model.

1-plastic bushing among the figure, 2-external screw thread, 3-internal thread, 4-convex platform, 5-lower convex platform, 6-half-thread, 7-railway spike, 8-sleeper, 9-railway spike fixing hole, 10-boss, 11-boss patchhole.

The specific embodiment

Accompanying drawing has provided three embodiment of the present utility model, and as can be seen from the figure the utility model is an all threaded plastic bushing inside and outside, it is characterized in that: plastic bushing 1 is to be embedded in advance in the sleeper fixing hole 9, and screw thread is all arranged inside and outside the plastic bushing 1.The cylindrical of plastic bushing 1 is an external screw thread 2, and interior circle is an internal thread 3, and internal thread hole and external screw thread are that the dislocation uniform pitch is arranged.And plastic bushing 1 is jagged PDX screw thread with the internal thread that railway spike 7 matches, and the hypotenuse of screw thread is big oblique angle, and the angle of hypotenuse and thread segment is 30 °-45 °, and cooperating between plastic bushing 1 and the railway spike 7 is a kind of loose fit.And plastic bushing 1 is pitch and the consistent screw thread of internal thread with the external screw thread 2 of concrete sleeper 8 combinations, requires difference according to road conditions, and external screw thread 2 can be selected the form of full thread or half-thread 6 for use.Can also can respectively add a horizontal boss 10 in two ends up and down at the cylindrical of sleeve pipe simultaneously, be divided into convex platform 4 and lower convex platform 5, be provided with patchhole 11 in the boss, be convenient to insert reinforcing bar when pre-buried, to improve the uplift resistance of sleeve pipe sleeper.Plastic bushing 1 can be selected different size because of the railway working condition requirement is different.

Claims

1, the concrete sleeper plastic bushing, plastic bushing (1) inside and outside all has screw thread, it is characterized in that: plastic bushing (1) is to be embedded in advance in the sleeper fixing hole (9), the cylindrical of plastic bushing (1) is external screw thread (2), interior circle is internal thread (3), internal thread (3) and external screw thread (2) are that the dislocation uniform pitch is arranged, and plastic bushing (1) is jagged PDX screw thread with the internal thread that railway spike (7) matches, cooperating between plastic bushing (1) and the railway spike (7) is a kind of loose fit, and plastic bushing (1) is pitch and the consistent screw thread of internal thread with the external screw thread (2) of concrete sleeper (8) combination.

2, the concrete sleeper plastic bushing of screw thread as claimed in claim 1 is characterized in that: the hypotenuse of described internal thread (3) is big oblique angle, and the angle of hypotenuse and thread segment is 30 °-45 °.

3, the concrete sleeper plastic bushing of screw thread as claimed in claim 1 is characterized in that: described external screw thread (2) is a full thread.

4, the concrete sleeper plastic bushing of screw thread as claimed in claim 1 is characterized in that: described external screw thread (2) is a half-thread (6).

5, the concrete sleeper plastic bushing of screw thread as claimed in claim 1 is characterized in that: simultaneously horizontal boss (10) can also be arranged on the sleeve pipe cylindrical, be provided with patchhole (11) in the boss.