CN202930852U - Structure for raising connection and tensile strength of sleeve-connected steel conduit - Google Patents

Abstract

Disclosed is a structure for raising connection and tensile strength of a sleeve-connected steel conduit. A concave pit which has the same diameter with a bolt and is 0.5-1 millimeter deep is processed at the bolt position of an accessory at one end of the steel conduit. During connection, the steel conduit is directly inserted into the accessory. The bolt of the accessory tightly presses in the concave pit, thus raising the connection and tensile strength.

Description

Improve the structure that the socket joint type steel conduit connects tensile strength

Technical field

The utility model relates to a kind of structure of tensile strength that connects with raising socket joint type steel conduit for wire protective.

Background technology

At present; known its construction connected mode small part of steel conduit system for wire protective adopts and is threaded; its major advantage is that the tensile strength that connects is high, has following shortcoming but be threaded: be at first that original anticorrosive coat at conduit screw thread place is cut and destroys, and make the tube wall attenuation.Destroyed the continuous conduction of pipe-line system protective earthing after the corrosion of junction, connecting portion reduces whole pipeline lifetime of system lower than the antiseptic property of whole pipe-line system, is unfavorable for energy-conservation.Next is that being threaded of steel conduit makes that construction and installation efficient is low to waste time and energy.

The shortcoming that exists owing to being threaded so the most of socket joint type that adopts of the connection of steel conduit at present connects, as long as two conduits are directly inserted in accessory, is tightened the connection work that screw on accessory had both been completed steel conduit.Its major advantage is:

1, the link of steel conduit need not done any processing, and anticorrosive coat and mechanical strength are not damaged, and the junction has identical antiseptic property and mechanical strength with pipe-line system, has extended the bulk life time of pipe-line system, is conducive to energy-conservation.

2, socket joint type connection construction installation effectiveness is high, and is time saving and energy saving.

But the present socket joint type that uses connects deficiency of existence, and the tensile strength that is exactly connection is lower, and the possibility that gets loose is arranged when pipeline is subject to larger pulling force or be embedded in advance in concrete.This is because the screw of accessory just is tightened in the smooth surface of steel pipe, so tensile strength is lower, usually can only bear the approximately pulling force of 300N, has limited the use of some occasions.

Summary of the invention

Have the lower deficiency of connection tensile strength in order to overcome existing socket joint type steel conduit, the utility model provides a kind of structure that the socket joint type steel conduit connects tensile strength that improves.

The technical scheme in the invention for solving the technical problem is: the screw position at the corresponding accessory in the connection end of steel conduit is processed a pit with tube wall, the diameter of pit is identical with the accessory screw diameter, pit depth 0.5-1 millimeter, the screw-driving of connection fittings reaches and improves the purpose that the socket joint type steel conduit connects tensile strength in the pit of steel conduit.

The beneficial effects of the utility model are, do not change original accessory, do not change the socket joint type form of construction work, because steel conduit belongs to light-wall pipe, the simple cost of tube wall processing pit technique is low, and the tensile strength of connection can reach more than 10 times of common socket connection, satisfies the installation needs of various occasions.

Description of drawings

Below in conjunction with drawings and Examples, the utility model is further illustrated.

Fig. 1 is socket joint type steel conduit and the accessory that uses at present.

Fig. 2 is the profile that the steel conduit of use at present connects.

Fig. 3 is that the utility model is with pit of steel conduit link tube wall processing.

Fig. 4 is the profile that the utility model conduit connects.

1,4 steel conduits in Fig. 1, Fig. 2,2. tight screw, 3. accessory.

Pit of steel conduit link processing in Fig. 3

1,4 steel conduit that is processed with pit, 2. screw, 3. accessories in Fig. 4.

Embodiment

In Fig. 1, present application is inserted steel conduit 1,4 in accessory 3, tightens the screw 2 of accessory 3 steel conduit is fixed, because of the smooth surface of screw fastening at steel conduit, so the tensile strength that connects is lower.

The pit of the utility model diameter of the link of steel conduit processing is identical with the accessory screw diameter, degree of depth 0.5-1 millimeter in Fig. 3, the steel conduit 1,4 that will be processed with pit in Fig. 4 inserts in accessory 3, tighten screw 2, because screw 2 drops in steel conduit 1,4 pit, so improved the tensile strength that steel conduit connects.

Claims (2)

1. one kind is improved the structure that the socket joint type steel conduit connects tensile strength, it is characterized in that: at pit of connection end processing of steel conduit, during connection, the screw-driving of accessory is in pit.

2. raising socket joint type steel conduit according to claim 1 connects the structure of tensile strength, and it is characterized in that: the diameter of pit is identical with the trip bolt of accessory, degree of depth 0.5-1 millimeter.

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