CN86201769U - Automatic clamper and locker for horizontal jack - Google Patents

Abstract

The utility model relates to an automatic clamper and a locker for a horizontal jack, which belong to devices for clamping and locking draw rods of the horizontal jack for bridge construction. The utility model is composed of an automatic clamper and an automatic locker. The draw rods can be automatically clamped during the pushing stroke of a jack cylinder, and the draw rods can be locked during the returning stroke of the jack cylinder, which prevents the deflection caused by the sag of the dead weight of the draw rods from being generated, makes the draw rods keep into a tensioning mode, prevents non-synchronous pushing caused by the deflection of the draw rods from happening, extends the service life of the utility model, and ensures the safety of a pier.

Description

Automatic clamper and locker for horizontal jack

The working level jack of a kind of bridge multi-point pushing clamps, locks the device of pull bar automatically.

The construction of bridge multi-point pushing is one of advanced construction method of using both at home and abroad.It utilizes level jack to be used as power, it is in place to drag bridge by pull bar.One termination level jack of pull bar, the anchor on the other end and the beam links, and level jack progressively spurs bridge and advances in reciprocating process.In the pushing tow operation process, owing to there are a plurality of level jack to split at each bridge pier, be the moment of flexure that bridge pier is born, torque control is in specialized range, guarantee construction and bridge pier safety, therefore the towing tension control and the work synchronization accuracy of level jack are had relatively high expectations, specifically comprise the synchronous of pushing tow speed and piston stroke.Usually general pull bar length all surpasses 10 meters, and when level jack piston during at drawback movement, pull bar loses constraint, because of the sagging amount of deflection that produces of conducting oneself with dignity.Because of the employed pull bar length of the level jack of each bridge pier difference, so the amount of deflection that pull bar produces is unequal.When level jack during in the multi-point pushing operation, each pushing tow stroke must be earlier overcomes its amount of deflection with pull bar is stretching, and just the stretchy bridge advances, and causes the shortening of jack piston effective travel.Because pull bar amount of deflection separately is unequal, thereby jack promote sequential that bridge advances different and produce asynchronous, the moment of flexure that bridge pier is born, the destruction that moment of torsion surpasses range of control, will cause bridge pier when causing pushing tow out of control, serious, jeopardize the safety and the quality of whole engineering, influence the duration.While is not only time-consuming taking a lot of work in the process of in the past manually installing and removing lock dog, clamping pull bar, and anchor clamps often damage.

At the problems referred to above, the purpose of this utility model provides a kind of operatorless device, at the two ends of level jack automatic binding clasp and locker is installed, and makes the level jack locker to one section pull bar between the anchor, at when work in tension all the time, prevent the generation of amount of deflection.When the incremental launching construction operation, make making full use of of level jack energy synchronized operation and piston stroke, thereby control pushing tow precision, protection bridge security effectively.

For achieving the above object, the utility model is installed automatic binding clasp at the front end of level jack, and the auto lock device is installed in its back-end, and both are the fixing fitting of level jack.Below in conjunction with drawings and Examples in detail constructional feature of the present utility model and operating principle are described in detail.

Fig. 1 is an automatic binding clasp front section view of the present utility model.

Fig. 2 is an auto lock device front section view of the present utility model.

Fig. 3 is a level jack system architecture set-up diagram.

The utility model is made up of automatic binding clasp and auto lock device two large divisions, automatically the structure of binding clasp as shown in Figure 1, it by adjustment nut (1), binding clasp pressure spring (2), spring tray (3), clamp nut (4), cone lock dog (5), clamp tapered sleeve (6), tension spring formations such as (7).Adjustment nut (1) is a hollow cylinder, in the light face that periphery is handled for blackout, the body is the step through hole, the inward flange of outlet through hole end is for bearing pressure spring (2), car has screw thread and clamps that tapered sleeve (6) links, clamp nut (4) is sleeved on and clamps on the tapered sleeve (6) in the big end through hole, after the mutual alignment of associated part (2), (3), (5), (6) regulates, with clamp nut (4) locking.Clamping tapered sleeve (6) is three sections step hollow cylinders, two sections less cars of outer round surface diameter have screw thread, and an end connects adjustment nut (1), and the other end connects with piston rod (8), clamping tapered sleeve endoporus flare, is that 30 ° taper hole and cylindrical hole join and form by cone angle.This flared hole combines with cone lock dog (5) outside face, and lock dog (5) can slide in the hole, and cone lock dog (5) is the truncation conulite, is divided into two equal half blocks along diametric(al).In cone lock dog (5) body equal diameter through hole is arranged, be processed with twice annular groove and plug helix in the hole, the twice annular groove is for tension spring (7) is installed, plug helix is meshed with pull rod screw, spiral molar line top is through special processing, the fine pull bar of clamping of energy can reduce the friction force between lock dog and the pull bar on the other hand again when the piston return of stroke on the one hand.Pressure spring (2) is that 4 millimeters carbon spring steel wires is made by diameter, and the work number of total coils is 8 circles.The material of tension spring (7) is identical with pressure spring, and gauge of wire is 3 millimeters.Pull bar is 40 silicon, the two alum screw-thread steels of 25 millimeters of diameters, and every long 12 meters, and it is through whole level jack and automatic binding clasp and locker.

Fig. 2 is the constructional drawing of auto lock device of the present utility model, it is by clamp nut (11), adjustment nut (12), coupling sleeve (13), auto lock body (14), pressure spring (15), spring tray (16), cone lock dog (17), tension spring (18), locking tapered sleeve (19), locating plate formations such as (20).Coupling sleeve (13) is "T"-shaped hollow cylinder, the big end annular knurl of cylinder, the small end car has outside thread, and adjustment nut (12) suit is on it, and an end of coupling sleeve (13) and auto lock body (14) join with screw thread, it is fastening with nut (12) to connect good back, flange is arranged in the coupling sleeve, and a side of flange is withstood spring (15), and a through hole is arranged in the coupling sleeve, one end car of through hole has negative thread, and it and level jack inner sleeve (10) are with thread connection.Locking body (14) is a thick-walled tube, the periphery annular knurl, and the inwall TBE, a termination coupling sleeve (13), the other end is for locking tapered sleeve (19) and locating plate (20) are installed.The structure of cone lock dog is with the binding clasp lock dog is identical automatically.Tapered sleeve (19) is a hollow circular cylinder, and the periphery car has screw thread, and inner chamber is truncated cone-shaped hole, 30 ° of cone angles, and the cone lock dog can slide in tapered sleeve.Locating plate (20) also can be called circular jam nut, and its end face is drilled with 6 uniform counterbores, and its diameter is 5 millimeters, for the usefulness of mounting or dismounting.Pull bar (9) connects whole auto lock device, and the pull bar line of centers should overlap with the locker axial line.

Principle of work of the present utility model and course of action Gai state as follows: in Fig. 1, when piston during at the pushing tow stroke, because of piston rod (8) is a rigid attachment with tapered sleeve (6), when piston moves left by the right side is past, drive whole automatic binding clasp and advance, in tapered sleeve, push, make the engagement of lock dog and pull bar because the elastic force of pressure spring (2) promotes lock dog (5), thereby the clamping pull bar drags bridge and advances.When piston during in return of stroke, piston rod drives binding clasp by moving from left to right, owing between lock dog (5) and the pull bar (9) friction force is arranged, the direction of its power is opposite with sense of motion, force lock dog to skid off and compression spring (2) in tapered sleeve, tension spring (7) works simultaneously, and lock dog is strutted, impel lock dog and pull bar to be in non-engagement state, at this moment whole automatic binding clasp can slide on pull bar.The size of the adjustable seamless power of adjustment nut (1) spring force, making it effectively to clamp pull bar again can be when the piston return of stroke, unlikelyly is subjected to too big friction drag, to reduce its power waste.After spring (2) elastic force size adjustment is appropriate, tighten up, to keep the stable of spring pressure with clamp nut (4).

In Fig. 2, when piston was made the pushing tow stroke, pull bar (9) was by right past moving left, owing to be in engagement between cone lock dog (17) and the pull bar, thereby drive lock dog (17) compression spring (15), tension spring (18) impels lock dog to open again simultaneously, and pull bar can pass through smoothly.When piston is made return of stroke, pressure spring (15) is pressed and is pushed away spring tray (16), promote cone lock dog (17) and clamp-on tapered sleeve (19), lock dog (17) is meshed with pull bar (9), thereby pinning pull bar, avoid pull bar because of the sagging amount of deflection that produces of conducting oneself with dignity, it is sagging to harm that bridge pier caused to overcome pull bar.

Automatic binding clasp of the present utility model and auto lock device, it and level jack are equipped in pairs to be used, and binding clasp is installed in jack front end and piston rod rigid attachment automatically, and is reciprocating with piston rod.The inner sleeve of auto lock device and jack is affixed, is installed in the jack tail end, becomes the attached connecting element of jack, but the member of auto lock device (15), (16), (17), (18) and pull bar (9) have relative motion.

The utility model system architecture device as shown in Figure 3, (21)-level jack is bearing before the positioning automatically, (22)-automatically binding clasp, (23)-the oil cylinder blind flange, (24)-and the oil cylinder oil sealing, (25)-oil cylinder, (26)-gland, (27)-the auto lock device, (28)-and piston, (29)-automatically rear support of transposing, (8)-piston rod, (9)-and pull bar, (10)-inner sleeve.Each stroke of this device piston is 710 millimeters, and operating oil pressure adopts the Pyatyi pressure regulation, and its range of pressure is 0～320 kg/cm, and specified jacking force is 40 tons, pushing tow speed 27.5 centimeters/minute.Meet pre-provisioning request through contriver's test.

Claims (4)

1, the working level jack of a kind of bridge multi-point pushing clamps, locks the device of pull bar automatically.It is characterized in that automatic binding clasp [22] is installed in the front end of level jack oil cylinder [25], and auto lock device [27] is installed in the rear end, both are the fixing fitting of level jack.Automatically binding clasp it by adjustment nut [1], binding clasp pressure spring [2], spring tray [3], clamp nut [4], cone lock dog [5], clamp tapered sleeve [6], tension spring formations such as [7].Above-mentioned member, clamps tapered sleeve [6] and piston rod [8] and uses thread connection on pull bar [9] by its mutual combined complete.It is reciprocating that whole automatic binding clasp is followed piston rod [8], and pull bar [9] connects automatic binding clasp and piston rod.

It is made of the auto lock device clamp nut [11], adjustment nut [12], coupling sleeve [13] auto lock body [14], pressure spring [15], spring tray [16], cone lock dog [17], tension spring [18], locking tapered sleeve [19], locating plate [20].Auto lock device and level jack inner sleeve [10] link and become the fixing fitting of jack, and pull bar [9] connects whole auto lock device [27].

2, the device of automatic binding clasp according to claim 1, locking pull bar, it is characterized in that: cone lock dog (5) can slide in clamping tapered sleeve.

3, according to the device of claim 1 and 2 described automatic binding clasps, locking pull bar, it is characterized in that: cone lock dog (5) is two along the axis direction subdivision, the lock dog inwall is processed with twice annular groove and plug helix with the one side that pull bar (9) contacts, and plug helix is meshed with pull bar (9).

4, the device of automatic binding clasp according to claim 1, locking pull bar, it is characterized in that: cone lock dog (17) can slide in locking tapered sleeve (19), cone lock dog (17) inwall has plug helix and one annular groove, pull bar (9) and plug helix engagement.

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