DX multiway limited concrete bar pressing joint sleeve
The multidirectional spacing reinforcing bar crimping sleeve of DX is that steel bars connects special-purpose sleeve pipe in the construction work.
The CABR notched bars sleeve squeezed joint of using in construction work at present (hereinafter to be referred as existing joint) is to wait that the termination that connects reinforcing bar successively inserts a steel bushing to two, several pressurize with machine for pressuring in the side then, make after the sleeve plastic strain promptly and the tight interlock of reinforcing bar, the effect that reaches connection (is seen Appendix: " CABR notched bars sleeve extruding link technique " Construction Structure Inst., Chinese Construction Science Research Inst).But above-mentioned technology remains in some problems, as: 1. two steel bar ends to be connected should meet in sleeve central authorities, to obtain enough crimping faces, could guarantee the intensity that reinforcing bar connects.And have joint now in construction, and the reinforcing bar engagement point can only be estimated or dipstick metering, and workload is big, and can not guarantee the accurate of crimping position fully.2. sleeve external pressure contact should be evenly distributed at a certain distance, constitutes best interlocking pattern.And the distribution of existing coupling compression joint point has not only increased workload only by the on-the-spot grasp of operating personnel, and skewness often.3. the connection status of existing joint only allows to connect with footpath double end straight line, can not adapt to the construction occasion of many diameters, many reinforcing bars, multi-direction connection.4. the thickness of sleeve wall is not considered the distribution of actual loading etc.
The purpose of this utility model is: overcome the above-mentioned shortcoming in the existing extruding link technique, improve quality of connection, enlarge the scope of application, not only simplify procedures, and improve efficiency of construction, and reduced material consumption.
The purpose of this utility model is achieved in that at first, the multidirectional spacing reinforcing bar crimping sleeve series of products of DX, location and outside fix design in having; Secondly, can determine the reinforcing bar aluminium hydraulic pressed connecting pipe according to quantity (2～12), direction and the diameter of institute's connecting reinforcement; The 3rd, can under the prerequisite that does not reduce crimp strength, reduce raw materials consumption by the sectional area step that successively decreases.Fig. 1 is a kind of two-way connecting reinforcement sleeve pipe product in the DX-1 plain edition subfamily.1 is interior positioning table among the figure, and 2 are outside fix platform (being provided with 3～5 according to the diameter that is connected reinforcing bar), and 3 is aluminium hydraulic pressed connecting pipe.Steel bar end can directly put in place at interior positioning table in the operation; When pressurizeing outside the pipe, pressure head can be determined the position according to the outside fix platform; Reinforcing bar bearing of trend and casing inner diameter can be determined according to engine request.Fig. 2 is a kind of two-way connecting reinforcement sleeve pipe product in the DX-2 subfamily.1 is interior positioning table among the figure, and 2 for the outside fix platform, and 3 are the sectional area step (according to diameter that is connected reinforcing bar and stressed distribution intensity result of calculation, being provided with 3～5) that successively decreases, and 4 is aluminium hydraulic pressed connecting pipe.Steel bar end can directly put in place at interior positioning table in the operation; During the outer pressurization of pipe, pressure head can be according to sectional area successively decrease step or outside fix step location; The direction of aluminium hydraulic pressed connecting pipe and internal diameter can be determined according to engine request.The DX-1 type can be used in combination with the technology of DX-2 type forms the DX-3 type, sees Fig. 3.Fig. 4 is a kind of three-dimensional connecting reinforcement sleeve pipe product in the adoptable multiple pressure override formats of DX-1, DX-2, DX-3 type.The cross-sectional shape of various aluminium hydraulic pressed connecting pipe can manufacture circle, ellipse, hexagon, eight distortion etc., to be suitable for multiple crimp.
The utility model is compared with the prior art scheme, has the following advantages: 1. the precalculated position in sleeve pipe, design has the positioning table of certain projection, make be connected steel bar end and insert aluminium hydraulic pressed connecting pipe after, can reach design attitude in the pipe easily and accurately.Also can avoid in the reinforcing bar attended operation, be forbidden to cause the few bonding strength of reinforcing bar crimping of certain direction because of the location and descend.At the aluminium hydraulic pressed connecting pipe peripheral hardware in respect of pressure head positioning table or the sectional area step that successively decreases, the pressurization design of this location makes the reinforcing bar after the crimping and the sleeve pipe interlock is stressed is evenly distributed, and has guaranteed quality of connection.3. present design allows to be provided with 2～12 aluminium hydraulic pressed connecting pipes on a sleeve pipe, the direction of each aluminium hydraulic pressed connecting pipe, diameter can be determined arbitrarily according to requirement of engineering, therefore overcome prior art and can only realize the pattern that same diameter, both-end head, straight line connect, thereby expanded this application range of products greatly, improved social benefit.4. owing on the sleeve pipe many positioning design are arranged, make on-site construction operations easy, rapid, improved labor productivity.5. owing to easy and simple to handle, make this operation of operating personnel's easy to perform.6. use the product of present design, do not need to change crimping apparatus.7. the design of DX-2 type subfamily in the present design, not only has above-mentioned every advantage, and the crimping number of times and the actual loading distribution situation that are connected with reinforcing bar according to sleeve pipe, the step (waiting strong design) that becomes sectional area to successively decrease the aluminium hydraulic pressed connecting pipe configuration design, make sleeve pipe when reinforcing bar connects, existing enough tensile strength and safety factor reduce material consumption again as far as possible.Generally can save material 20～30%.
The enforcement of present design can be adopted casting method, and its superiority is: 1. the sleeve design that can realize multiple external form complexity requires (as mentioning in the 3rd advantage), has simplified processing technology; 2. can increase economic efficiency greatly, as: raw material can be used steel scrap; Do not need machining process; Do not processed the influence of quantity; Cost is low.
