Guide rail is clamped under a kind of iron driller impact tong with hard and soft transfer characteristic
Technical field
The invention belongs to mechanical equipment technical field, is related under a kind of iron driller impact tong with hard and soft transfer characteristic and clamps
Guide rail.
Background technology
Iron driller be carry out drilling rod, on drill collar joint shackle work modernization instruments, instead of traditional liquid gas tong,
Type B clamps.The impact tong of iron driller is divided into pincers and lower pincers, a drilling rod of the lower tight bottom of clamp, upper another immediately above of clamp
Drilling rod and button and the function of shackle on bottom drilling rod central rotation, realization.
At present, on the impact tong of iron driller pincers in completion after shackle, it is necessary to around it is upper pincers lower pincers between guide rail in
The heart returns to home position, and guide rail is two with one heart and has cooperation cambered surface becket, is welded on pincers and lower pincers.But
When shackle on impact tong, because there is certain deviation drilling rod position, drilling rod center can not be completely concentric with guideway centreline, because
This, when upper shackle, the revolutes of upper pincers has two, one be upper and lower pincers guide rail center, one be drilling rod center,
As a result cause crossing for rotary motion to position, often shown in working at the scene and destruction is produced in the weaker position of structural strength,
Have plenty of iron driller guide rail to be worn, have plenty of guide rail weld seam tear, also have plenty of pincers tooth and crumble etc., reduce iron driller
Reliability and service life.
There are following several solution methods both at home and abroad at present:First, drilling rod center is looked for by the centering body of clamping clip so that
Every time clamp drilling rod, drilling rod center and guideway centreline are concentric, but this design method cause clamp jaw mechanism complexity, weight compared with
Weight;And in Product processing and assembling process, it is impossible to reach entirely on the center, bias exists all the time, and revolute also has all the time
Two, mechanical failure caused by bias also exists all the time, simply the problem of damage weight.Second, by increasing between guide rail mating surface
Gap removes the constraint in upper shackle to rotary motion, this method be equally possible to when clamping by gap eat up from
It is and ineffective.
The content of the invention
It is an object of the invention to provide guide rail is clamped under a kind of iron driller impact tong with hard and soft transfer characteristic, solve existing
There is structure present in technology to cross orientation problem, and eliminate extruding, wear problem caused by mechanical movement, add anvil
The reliability of work and service life.
The technical solution adopted in the present invention is to clamp guide rail under a kind of iron driller impact tong with hard and soft transfer characteristic,
The lower pincers guide rail be semicircular configuration from top to bottom, including upper end lead ring and lower end lead ring, upper end lead ring by flexible rubber and
Lower end lead ring is connected as semiorbicular one, i.e. upper end lead ring is sulfided by flexible rubber and lower end lead ring, above-mentioned
Three parts form lower pincers rail body together;
In the right and left of lower pincers rail body, upper end lead ring, flexible rubber and lower end lead ring vertically bore jointly
There is a via, altogether two vias, a set of piston rod Hard link mechanism is provided with each via;
The structure for often covering piston rod Hard link mechanism is to be respectively fitted with upper piston, piston from top to down in the vias
Bar and lower piston, the upper port of upper end lead ring have along the upper piston chamber for being fixed with upper piston, the upper piston chamber external connection
Upper end hydraulic fluid port, for the lower port of lower end lead ring along the lower piston chamber for being fixed with lower piston, lower piston chamber external connection has lower end oily
Mouthful.
The present invention's has hard and soft transfer characteristic iron driller impact tong guide rail, is further characterized in that:
Described via and piston rod Hard link mechanism is at least correspondingly arranged 2 sets.
The uppermost position in fig-ure progress that described upper piston chamber is used for upper piston is spacing, and lower piston chamber is used for lower piston
Lowermost position put carry out it is spacing.
Diametrically section is T-shaped shape to described upper piston, and T-shaped convex shoulder is cylindrical to be provided with one with via inwall contact surface
Individual sealing ring, under the thin axial direction of upper piston with piston rod apical grafting.
Described lower piston is cylindrical to be provided with another sealing ring with via inwall contact surface, lower piston upwards with work
Stopper rod apical grafting.
The invention has the advantages that on iron driller in button and the course of work of shackle, pass through the hard and soft characteristic of uniqueness
Lower pincers guide rail structure design, is divided into upper and lower ends, middle part uses block rubber by the rigidity guide rail clamped under existing iron driller
Connection, the top and the bottom of such guide rail are flexible guide rail;There is the piston connection that fluid power acts on the longitudinal direction of upper and lower side guide rail simultaneously, needs
When to want guide rail be rigidity, upper and lower side guide rail consolidation is integrated, it is necessary to during guide rail flexibility by piston rod, and piston rod, which unclamps upper and lower side, leads
Rail.Flexible guide rail pattern is used so in upper shackle, decontrols guide rail constraint, upper pincers surround drilling rod central rotation, were not present
Positioning;When upper pincers reset, using rigidity guide rail pattern, now upper pincers release drilling rod, decontrols the constraint of drilling rod center, upper pincers guide rail edge
Zhe Xiaqian guideway centreline resets, and does not also fill in underconstrained problem.Led as can be seen that the guide rail of lower pincers is changed using hard and soft characteristic variable
Rail design, eliminate at present due in upper shackle it is existing cross positioning phenomenon, add iron driller impact tong reliability and
Service life.
Brief description of the drawings
Fig. 1 is the structural representation (top view) of the present invention;
Fig. 2 is the Section A-A schematic diagram in Fig. 1 (piston rod is in neutral position);
Fig. 3 is the schematic cross-section that the present invention is in flexible guide rail pattern (piston rod is put in lowermost position);
Fig. 4 is the schematic cross-section that the present invention is in rigid guideway pattern (piston rod is in uppermost position in fig-ure).
In figure, 1. upper end hydraulic fluid ports, 2. upper end lead rings, 3. flexible rubbers, 4. lower end lead rings, 5. lower end hydraulic fluid ports, 6. tops are lived
Plug, 7. piston rods, 8. lower pistons, 9. times pincers guide rails.
Embodiment
The present invention is described in detail with reference to the accompanying drawings and detailed description.
Reference picture 1, Fig. 2, structure of the invention be, the lower pincers guide rail 9 is semicircular configuration from top to bottom, including upper end is led
Ring 2 and lower end lead ring 4, upper end lead ring 2 are connected as semiorbicular one, i.e. upper end lead ring by flexible rubber 3 and lower end lead ring 4
2 are sulfided by flexible rubber 3 and lower end lead ring 4, and above-mentioned three parts form the lower main body of pincers guide rail 9 together;
In the right and left of the lower pincers main body of guide rail 9, (on the direction of upper end lead ring 2 and the plane of lower end lead ring 4)
Upper end lead ring 2, flexible rubber 3 and lower end lead ring 4 be common to be vertically drilled with a via (Fig. 1 embodiments two mistakes altogether
Hole), a set of piston rod Hard link mechanism is provided with each via;
The structure for often covering piston rod Hard link mechanism is to be respectively fitted with upper piston 6, piston from top to down in the vias
Bar 7 and lower piston 8, the upper port of upper end lead ring 2 externally connect along the upper piston chamber for being fixed with upper piston 6, the upper piston chamber
Upper end hydraulic fluid port 1 is connected to, the lower port of lower end lead ring 4 has along the lower piston chamber for being fixed with lower piston 8, lower piston chamber external connection
Lower end hydraulic fluid port 5, above-mentioned part are collectively referred to as piston rod Hard link mechanism (Fig. 1 embodiments two sets of pistons altogether of lower pincers guide rail 9
Bar Hard link mechanism).
The uppermost position in fig-ure progress that upper piston chamber is used for upper piston 6 is spacing, and lower piston chamber is used for lower piston 8 most
Lower position carries out spacing.
It can also be linked together between upper end lead ring 2 and lower end lead ring 4 from other flexible materials.
Via and piston rod Hard link mechanism are at least correspondingly arranged 2 sets.
Diametrically section is T-shaped shape to upper piston 6, T-shaped convex shoulder is cylindrical be provided with via inwall contact surface one it is close
Seal, under the thin axial direction of upper piston 6 with the apical grafting of piston rod 7.
Lower piston 8 is cylindrical to be again provided with another sealing ring with via inwall contact surface, lower piston 8 upwards with work
The apical grafting of stopper rod 7.
The present invention operation principle be,
Lower end lead ring 4 in lower pincers guide rail 9 is connected under impact tong on pincers panel and the guide rail with being clamped on impact tong is same
The heart, upper pincers guide rail inner side and the outside of upper end lead ring 2 of the lower pincers guide rail 9 coordinate rotation,
1) as shown in figure 3, when linking closely or releasing, the topping up of upper end hydraulic fluid port 1 is given, hydraulic coupling promotes upper piston 6, piston rod
7 and lower piston 8 move downwardly together, piston rod 7 exit completely upper end lead ring 2 endoporus enter lower end lead ring 4 endoporus in;
At this moment, because piston rod 7 is completely into lower end lead ring 4, and simply contacted between upper piston 6 and piston rod 7, upper piston
6 and piston rod 7 can not rigidity positions in the horizontal direction by upper end lead ring 2 and lower end lead ring 4, therefore, upper end lead ring 2 and lower end
Fully rely on flexible rubber 3 between lead ring 4 to connect, the two can be moved relative flexibility in the horizontal direction, and so entirely lower pincers are led
Rail 9 is essentially become as flexible guide rail, and equivalent to this revolute of guideway centreline is eliminated, upper pincers simply revolve around drilling rod center
Turn, crossing when eliminating shackle on impact tong positions.
2) as shown in figure 4, being resetted when upper button or after the completion of releasing, it is necessary to unclamp drilling rod to upper pincers, now, to lower end hydraulic fluid port
5 topping ups, hydraulic coupling promote lower piston 8, piston rod 7 and upper piston 6 to move upwardly together, and the top of piston rod 7 enters upper end
In the endoporus of lead ring 2, while the bottom of piston rod 7 is also in the endoporus of lower end lead ring 4;So, upper end lead ring 2 and lower end lead ring 4
Not only connected by flexible rubber 3, the piston rod 7 in the via of left and right two also functions to the effect for the pin that is rigidly connected, by upper end lead ring 2
Movement with the horizontal direction of lower end lead ring 4 is entirely limited;At this moment, pincers unclamp drilling rod on when being resetted due to upper pincers, lose around brill
The revolute pair that bar rotates, upper pincers only rotate by revolute pair of the rigid guideway around lower pincers, the reset clamped in realization;So only
One rotational restraint, also it is not present and owes positioning.
The present invention iron driller impact tong under pincers guide rail there is hard and soft transfer characteristic, mainly on iron driller pincers on shackle and
During resetting two kinds of working conditions, by changing the characteristic of guide rail, realize increase or eliminate revolute caused by guide rail, protect
In above two working condition, impact tong was not present positioning or owed positioning card;The present invention can be eliminated at present due to rigidity
Positioning is rotated through caused by guide rail, so as to eliminate the equipment damages such as pincers tooth bursts apart, guide rail scratches, substantially increases making for equipment
Use the life-span.