CN102251750B

CN102251750B - Holder

Info

Publication number: CN102251750B
Application number: CN 201110161291
Authority: CN
Inventors: 张孟和; 苏芳冰; 梁继成
Original assignee: HEFEI AEROSPACE HYDRAULIC MACHINERY CO Ltd
Current assignee: Hefei Aerospace Hydraulic Machinery Co., Ltd.
Priority date: 2011-06-16
Filing date: 2011-06-16
Publication date: 2013-11-06
Anticipated expiration: 2031-06-16
Also published as: CN102251750A

Abstract

The invention belongs to the field of mine machinery and particularly relates to a holder for a mine tunnel drilling machine. The holder provided by the invention comprises a left piston cylinder unit and a right piston cylinder unit which are respectively arranged at the two sides of an axis of a drill rod; piston rods of the left and right piston cylinder units are oppositely arranged; the front ends of the rod bodies of the piston rods are fixedly connected with a left holding block and a right holding block which are matched to be used for holding the drill rod; each piston cylinder unit at least comprises a piston cylinder; the piston cylinders are bidirectional hydraulic piston cylinders; and the left and right piston cylinder units are mutually reverse to form thrust or tension symmetrical arrangement. The holder provided by the invention has the advantages of simplicity in structure, stability and reliability in operation and long service life.

Description

A kind of clamper

Technical field

The invention belongs to the mine equipment field, be specifically related to a kind of clamper for mining underground drill rig.

Background technology

Underground drill rig is to be used in specially the rig that creeps into work in underground passage; rig all is provided with clamper usually; its effect is important is for the protection of drilling rod in the hole; prevent drilling rod slippage in the hole; also can coordinate with unit head the automatic dismantling that carries out drilling rod; hydraulic gripper is because of safe and convenient to use, and clamping force is widely adopted greatly.

hydraulic gripper commonly used mainly contains normally closed type at present, three kinds of open in usual and combined types, to this, " drill-rod hydraulic clamper for coal mine " of Hill coal mine in Jiangsu Equipment Co (ZL201020544979.6), " a kind of open-top composite clamp holder " of Sian Branch Of China Coal Research Institute (ZL201010108949.5) and all on the books in " multiple fluid-pressure clamper " application text (ZL200820100167.5) of Coal Scientific Research Institute Chongqing Institute, mainly comprise left clamping device and the right clamping device that can reach in opposite directions reverse motions, the left and right clamping device arranges the left and right slips that is used for holding drill pipe that matches at its place of joining, thrust unit all is set in the sandwich device, as unidirectional oil cylinder and elastic device (as spring etc.).During actual the use, or be responsible for clamping drilling rod as the spring of normally closed type clamper, unidirectional oil cylinder is responsible for unclamping, or clamp as unidirectional oil cylinder open in usual, spring unclamps, or arranges unidirectional oil cylinder as a side clamping device of combined type, and opposite side is arranged elastic device, rely on spring " to be pressed " and realize clamping, rely on simultaneously another the unidirectional oil cylinder that is arranged in elastic device one side to realize unclamp operation.the general defective of technique scheme is: at first, elastic device such as spring etc., dependence self deformation own reaches the clamping purpose, also just certainly exist fatigue strength, the environment that uses is more complicated, and the compressing and stretching frequency is larger, inevitable shortening further in its application life, this just needs the regular Maintenance and Repair of staff and dismounting and change, causes puzzlement to construction, secondly, when needs are changed spring, often need the sandwich device to change together, otherwise inevitable because its chucking power or unclamp the unbalanced of power and cause departing from of Clamping Center, the phenomenon that finally drilling rod bending or drilling-rod external wall polishing slips occur due to the axis of the axis runout borer drill rod of actual clamping occurs, thereby causes the raising of maintenance cost, again, unclamp at unidirectional oil cylinder, in the normally closed type hydraulic gripper of spring clamp, the size of its chucking power often depends on the tension force that spring produces, need larger specification or more spring, yet the increase of its power must cause again the oil cylinder unilateral thrust to need to increase, open clamp port in order to overcome spring force, this just causes again the increase of clamper overall volume and the reduction of hydraulic switch efficient, both often can't get both, in case and this kind clamper spring fatigue occurs and chucking power is not enough, just there is very big production hidden danger, and in the composite hydraulic clamper, because elastic device is in " being pressed " state all the time, after work a period of time, the elastic device that is pressed is tired, tension force reduces, and it is still constant as the unidirectional oil cylinder hydraulic power of the side of exerting pressure, the skew in the clamping axle center of clamping device appears, finally cause the drilling rod axial line not overlap with the axis of clamping through hole, the phenomenon that drilling rod polishing slips inwall occurs, the generation of drilling rod bending and the phenomenon that fractures even also can appear, at last, particular job environment due to clamper, clamper no matter which kind of, all there are alluvial and the slips damage replacing problems such as mud of clamp port, slips in such scheme all is arranged in external shell, need to change in case the alluvials such as the mud of clamp port need cleaning or slips to damage, often need whole stripping device, cause the waste in man-hour.

Summary of the invention

The purpose of this invention is to provide a kind of clamper simple in structure, the reliable and long service life of its working stability.

For achieving the above object, the present invention has adopted following technical scheme: a kind of clamper, the left and right piston rod unit that comprises the drill rod axis both sides that are placed in, the piston rod of described left and right piston rod unit is arranged in opposite directions, its lever front end is connected with the left and right grip block that is used for holding drill pipe that matches, described each piston rod unit comprises a piston rod at least, described piston rod is the bidirectional hydraulic piston cylinder, described left and right piston rod unit each other oppositely and the thrust or the pulling force that consist of are arranged symmetrically with.

Beneficial effect of the present invention is: after adopting said structure, abandoned the structure of establishing elastic device in traditional, high maintenance cost and the operation hidden danger of also just having avoided the employing elastic device to bring, simultaneously, simple hydraulic clamping, guaranteed that also its overall structure is simple, be easy to safeguard, working stability is reliable, simultaneously its chucking power all can be directly realizes fine adjustment by regulating pump etc., regulates and be easy to the resilient clamp of deformation than old-fashioned being difficult to, and the present invention is more convenient, and due to the self lubricity of hydraulic pressure, its longer service life.

Description of drawings

Fig. 1 is the structural representation of a of the present invention when being applied to underground drill rig;

Fig. 2 is structural representation of the present invention;

Fig. 3 is the A-A sectional view of Fig. 2;

Fig. 4 is the I part partial enlarged drawing of Fig. 2.

The specific embodiment

A kind of clamper, the left and right piston rod unit that comprises the drill rod axis both sides that are placed in, the piston rod of described left and right piston rod unit is arranged in opposite directions, its lever front end is connected with the left and

right grip block

11,12 that is used for holding drill pipe that matches, described each piston rod unit comprises a piston rod at least, described piston rod is the bidirectional hydraulic piston cylinder, described left and right piston rod unit each other oppositely and the thrust or the pulling force that consist of are arranged symmetrically with, as shown in Fig. 2-3.

further, consider that the applied environment of the present invention is abominable, drilling rod inevitably exists when rotating and swings simultaneously, for avoiding drilling rod to be positioned at the left side of its axis both sides because of touching,

right grip block

11, 12 and drilling rod body of rod scraping occurs and even damage phenomenon, described clamper also is included in a left side, right grip block 11, be used for retraining and helping the bearing unit 30 of drilling rod work during 12 separation, described bearing unit 30 is arranged at a left side, on the current path of the drilling rod of right piston rod unit, the axis of described bearing 31 and drilling rod are installed dead in line, described bearing 31 internal diameters are slightly larger than drill pipe diameter, as shown in Figure 3.

As the present invention further optimization scheme: as shown in Fig. 2-3, the piston rod number of described left and right piston rod unit is one, the dead in line setting of described left and right piston rod unit.

Further, described clamper comprises fixed mount 20, described left and right piston rod unit comprises cylinder body, piston and the piston rod that is arranged symmetrically with along drilling rod 40 axis, described fixed mount 20 is postponed and affixed forming for the abutting end on left and right cylinder body, described fixed mount 20 profiles are sleeve-shaped, described piston and piston rod be positioned at fixed mount 20 inner and and its inwall between consist of matching relationship, described fixed mount 20 radially offers for the current path 23 of drilling rod 40 along it in the middle.

As the further restriction to such scheme, described bearing unit 30 is arranged at the other end away from the drilling rod bare terminal end of path 23, for the fixing-stable that guarantees 20 of bearing unit 30 and fixed mounts reliable, the annular slab 32 that described bearing unit 30 comprises bearing 31 and is used for bearing 31 is fixed in fixed mount 20 outer wall places, as shown in Figure 3.

Further, for realizing the routing motion of piston rod and piston and fixed mount 20 inwalls, described fixed mount 20 comprises for the liquid inlet and outlet 21 that pushes the fixed mount inner carrier.for further reducing its cost, describedly advance, liquid outlet 21 is made as three, wherein two are communicated with respectively two-piston cylinder unit back cavity section, another is communicated with one of them piston rod unit ante-chamber section, be provided with the connection duct 22 that is communicated with two-piston cylinder unit ante-chamber section in described fixed mount 20, like this, during practical operation, by to being communicated with respectively advancing of two-piston cylinder unit back cavity section, liquid outlet 21 oil transportations realize left,

right grip block

11, 12 clamp operation, by to being communicated with advancing of one of them piston rod unit ante-chamber section, liquid outlet 21 oil transportations realize left,

right grip block

11, 12 lock out operation, connecting 22, duct is on a left side, right grip block 11, play oil transportation path and balanced oil pressure effect during 12 separation, thereby advance by one, liquid outlet 21 can be realized a left side, motion in the time of right piston rod unit, as shown in Fig. 2-3.

as shown in Fig. 2-4, for avoiding left,

right grip block

11, 12 overturn around fixed mount 20 axle center, affect its normal operation, a described left side, right grip block 11, the 12 profile side of being bodies are block, its sides adjacent is provided with the arc clamp port 13 that is complementary with drilling rod 40 outer walls, described fixed mount 20 is circular hole with the piston cooperation place, it is with left,

right grip block

11, 12 auxiliary sections are and a left side, right grip block 11, the square hole shape that 12 profiles are adaptive, in other words, the inwall that is to say the fixed mount 20 of sleeve-shaped is rendered as the two terminal circle pass, the structure of middle part square groove, thereby retrain a left side by square hole shape hole road,

right grip block

11, 12 direct of travel, guarantee its correct reliable holding drill pipe,

Simultaneously, be provided with dovetail groove 14 with the tailpiece of the piston rod cooperation place on described left and

right grip block

11,12, described tailpiece of the piston rod is provided with the dovetail shaped voussoir that matches with it, and both clampings coordinate.

consider a left side,

right grip block

11, 12 convenient installation and replacing, described fixed mount 20 also comprises the baffle plate 24 of its front and back end that is placed in, enclose between described baffle plate 24 inwalls and fixed mount 20 inwalls and consist of the above-mentioned left side that supplies, right grip block 11, the square hole shape hole road of 12 operations, affixed between described bearing unit 30 and one side shield 24 outer walls, a described left side, right grip block 11, dovetail groove 14 flute length direction paralleled paths 23 on 12 run through the direction setting, described baffle plate 24 is two and the drilling rod 40 axis both sides of being placed in, its abutting end offers the arc-shaped notch 241 be used to the current path of dodging drilling rod 40.In practical operation, when left and right grip block 11, when 12 damages need to be changed, only need directly to dismantle baffle plate 24, can take out respectively the left and

right grip block

11,12 that coordinates with tailpiece of the piston rod formation flute profile, efficient and convenient.

Further, for solving the alluvial problem of clamp port mud on clamper etc., described fixed mount 20 is provided with for drilling rod 40 current path 23 positive bottom at it and runs through letting out of inside and outside wall dirty hole 25, thereby realizes the in time eliminating fast of clamp port mud etc.Simultaneously, be furnished with concave convex texture on the clamping face of the arc clamp port 13 on left and

right grip block

11,12, to realize left and right grip block 11, the 12 reliable effectively clampings for drilling-rod external wall.

Claims

1. clamper, the left and right piston rod unit that comprises the drill rod axis both sides that are placed in, the piston rod of described left and right piston rod unit is arranged in opposite directions, its lever front end is connected with the left and right grip block (11,12) that is used for holding drill pipe that matches, it is characterized in that: described each piston rod unit comprises a piston rod at least, described piston rod is the bidirectional hydraulic piston cylinder, described left and right piston rod unit each other oppositely and the thrust or the pulling force that consist of are arranged symmetrically with; Described clamper also is included in the bearing unit (30) that is used for retraining and helping drilling rod work when left and right grip block (11,12) separates, described bearing unit (30) is arranged on the drilling rod current path of left and right piston rod unit, the axis of described bearing (31) and drilling rod are installed dead in line, and described bearing (31) internal diameter is slightly larger than drill pipe diameter; The piston rod number of described left and right piston rod unit is one, the dead in line setting of described left and right piston rod unit; Described clamper comprises fixed mount (20), described left and right piston rod unit comprises cylinder body, piston and the piston rod that is arranged symmetrically with along drill rod axis, described fixed mount (20) is postponed and affixed forming for the abutting end on left and right cylinder body, described fixed mount (20) profile is sleeve-shaped, described piston and piston rod be positioned at fixed mount (20) inner and and its inwall between consist of matching relationship, described fixed mount (20) radially offers for the current path (23) of drilling rod along it in the middle; Described bearing unit (30) is arranged at the other end away from the drilling rod bare terminal end of path (23), and described bearing unit (30) comprises bearing (31) and the annular slab (32) that is used for bearing (31) is fixed in fixed mount (20) outer wall place; Described fixed mount (20) comprises for the liquid inlet and outlet (21) that pushes the fixed mount inner carrier, described liquid inlet and outlet (21) is three, wherein two are communicated with respectively two-piston cylinder unit back cavity section, another is communicated with one of them piston rod unit ante-chamber section, is provided with the connection duct (22) that is communicated with two-piston cylinder unit ante-chamber section in described fixed mount (20).

2. clamper according to claim 1, it is characterized in that: a described left side, right grip block (11, 12) the profile side of being body is block, its sides adjacent is provided with the arc clamp port (13) that is complementary with drilling-rod external wall, described fixed mount (20) is circular hole with the piston cooperation place, it is with left, right grip block (11, 12) auxiliary section is and a left side, right grip block (11, 12) the adaptive square hole shape of profile, a described left side, right grip block (11, 12) be provided with dovetail groove (14) with the tailpiece of the piston rod cooperation place on, described tailpiece of the piston rod is provided with the dovetail shaped voussoir that matches with it, both clampings coordinate.

3. clamper according to claim 2, it is characterized in that: described fixed mount (20) also comprises the baffle plate (24) of its front and back end that is placed in, enclose between described baffle plate (24) inwall and fixed mount (20) inwall and consist of for left, right grip block (11, 12) the square hole shape hole road of operation, affixed between described bearing unit (30) and one side shield (24) outer wall, a described left side, right grip block (11, 12) dovetail groove on (14) flute length direction paralleled path (23) run through the direction setting, described baffle plate (24) is two and the drill rod axis both sides of being placed in, its abutting end offers be used to the arc-shaped notch in the current path of dodging drilling rod (241).

4. the described clamper of any one claim according to claim 1 to 3 is characterized in that: described fixed mount (20) is provided with for the current path (23) of drilling rod positive bottom at it and runs through the dirty hole of letting out of inside and outside wall (25).

5. the described clamper of any one claim according to claim 1 to 3, is characterized in that: be furnished with concave convex texture on the clamping face of the arc clamp port (13) on left and right grip block (11,12).