CN2888058Y - Retractable drill rod and retractable long screw boring device - Google Patents
Retractable drill rod and retractable long screw boring device Download PDFInfo
- Publication number
- CN2888058Y CN2888058Y CN 200620031225 CN200620031225U CN2888058Y CN 2888058 Y CN2888058 Y CN 2888058Y CN 200620031225 CN200620031225 CN 200620031225 CN 200620031225 U CN200620031225 U CN 200620031225U CN 2888058 Y CN2888058 Y CN 2888058Y
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- drilling rod
- ring
- interior
- guide pin
- pin bushing
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Abstract
The utility model discloses a telescopic drill pipe and a telescopic long helical drilling device. An inner drill pipe of the telescopic drill pipe is inserted inside the inner chamber of the outer spiral drill pipe, and the upper end of the outer spiral drill pipe is connected with an upper hollow seal short section and a guide sleeve in turn, while the lower end of the outer spiral drill pipe is connected with a lower hollow seal short section and the other spiral drill pipe or a screw auger; the shape of the inner chamber of the guide sleeve matches with the shape of the inner drill pipe and a positioning member is provided between the two devices; the upper end of the inner drill pipe joint is connected with the lower end of the inner drill pipe, and an upper seal member and a lower seal member are arranged respectively at the external circumference face of the joint. The telescopic long helical drilling device also includes a derrick, a power member and a lifting member. The upper end of the inner drill pipe is connected with the power member and a hydraulic cylinder is mounted on a supporting platform at the bottom of the derrick; a piston rod of the inner drill pipe matches with a folding bearing beam mounted on the derrick. The utility model relates characterized in that the utility model can increase the borehole depth of the drilling rig in prior art, and the utility model has the advantages of simple structure, good seal effect, wide application range, special fitness for CFG construction, and good social and economic benefits.
Description
One. technical field: the utility model relates to a kind of drilling system of piling machinery, particularly relates to a kind of telescopic drill rod and telescopic long spiral drilling device.
Two. background technology: at present, in the piling machinery field, full screw earth auger in most of the cases adopts CFG worker's method construction, because can't stacks in this worker's method construction, and drilling depth is subjected to the influence of factors such as boring tower height, dynamic torque, bore diameter and geological condition.In above influence factor, except that drilling depth is subjected to tower height influences, other influence factor is not a subject matter; That is to say that drilling depth mainly decided by the boring tower height, bore darker hole and must join higher boring tower, and increasing of boring tower will cause that borer chassis increases, the boring tower enlarged diameter, otherwise stability is difficult to guarantee; And borer chassis increases, the increasing of boring tower diameter directly causes equipment huge, problems such as cost increases, transportation inconvenience.
Three. the utility model content:
The purpose of this utility model: overcome the defective of prior art, a kind of simple in structure, good sealing effect, easy to use, the telescopic drill rod and the telescopic long spiral drilling device that can increase existing rig drilling depth are provided.
The technical solution of the utility model: a kind of telescopic drill rod, contain interior drilling rod, the external spiral drilling rod, augers, wherein interior drilling rod is sleeved in the inner chamber of external spiral drilling rod, be provided with detent mechanism between the two, the front end of external spiral drilling rod is connected with augers, wherein, the two ends of described external spiral drilling rod are connected with a hollow sealing pipe nipple respectively, the upper end of last hollow sealing pipe nipple is connected with guide pin bushing, the lower end of following hollow sealing pipe nipple is connected with another external spiral drilling rod or augers, the intracavity section shape of guide pin bushing and the cross sectional shape of interior drilling rod are complementary, and are provided with detent mechanism between the two; Interior drilling rod lower end is connected with interior tool joint, is respectively equipped with upper and lower sealing mechanism on the periphery of tool joint in described, so that be tightly connected with the inner cavity surface of upper and lower packoff nipple respectively.
Spring is contained in described lower seal mechanism, the slip sheath, the awl cap, dust ring and sealing ring, the bottom of interior tool joint is provided with two undergauge step sections, the slip sheath is sleeved on the external peripheral surface of undergauge step section, its external surface is provided with dust ring, its inner surface bottom is provided with an annular convex ring, the awl cap is installed in down the bottom of undergauge step section, between the upper surface of the upper ring surface of described annular convex ring and following undergauge step section spring is installed, upper surface of anchor ring and awl cap contacts under it, the front portion of awl cap external surface is a taper seat, its rear portion is the face of cylinder, and the face of cylinder is provided with lower seal, the external surface of lower seal contacts with the bottom of slip jacket inner surface, the external surface of dust ring contacts with the inwall of external spiral drilling rod, described slip sheath, the baffle ring that awl cap and following hollow sealing pipe nipple inwall bottom are provided with is complementary, and the upper ring surface of baffle ring can be contacted with the end face of slip sheath, and its inner ring surface can contact with the lower seal on the awl cap.
Described guide pin bushing is an integral structure, or is split-type structural, is connected by bolt by two and half bodies; Described guide pin bushing intracavity section is shaped as regular hexagon, or is square, or is octagon; Drilling rod is a prism in described, the cross sectional shape of its cross sectional shape and guide pin bushing is complementary, or interior drilling rod is made up of the prism at two ends and middle cylinder, and the cross sectional shape of the cross sectional shape of two ends prism and guide pin bushing is complementary, and the cylinder of centre is provided with feather key.
Described detent mechanism is the semicircle jack that fastening screw and interior drilling rod and guide pin bushing contact and be respectively equipped with on the surface, wherein in two ends of drill portion be provided with the semicircle jack of some respectively so that adapt to the requirement of different hole depths; The described hollow sealing pipe nipple of going up is provided with air-vent, and following hollow sealing pipe nipple is provided with clean-out opening, and clean-out opening is provided with obstruction.
A kind of telescopic long spiral drilling device that contains described telescopic drill rod, also contain boring tower, actuating unit and hoisting mechanism, actuating unit is installed on the lead of boring tower, and its upper end is connected with hoisting mechanism, so that move up and down, wherein, the interior drilling rod upper end of described telescopic drill rod connects with the output shaft of actuating unit, a support platform is fixed in the bottom of boring tower, hydraulic cylinder is installed on the support platform, the piston rod of hydraulic cylinder matches with the opening-closing type spandrel girder, and the opening-closing type spandrel girder is installed in by fixed mount on the lead of boring tower, and it is opened or can unclamp or block telescopic drill rod when closing up.
Described opening-closing type spandrel girder contains two strutbeams and fixed mount, wherein the inner end of two strutbeams is hinged on the fixed mount, fixed mount is installed on the lead of boring tower by sliding sleeve, and the both ends of two strutbeams are provided with a jack respectively, when two strutbeams close up, the jack of one end can overlap, and hydraulic cylinder is two, and its piston rod upper end can be inserted respectively in the jack at two strutbeam both ends.
The beneficial effects of the utility model:
1. telescopic drill rod modern design of the present utility model can make former drilling depth extend about 12 meters, if stratum condition is better, can also reach darker; Its good sealing effect and transfer torque are big, be respectively equipped with upper and lower hermetically-sealed construction in the interior tool joint, wherein the lower seal structure is a slip covering type, when the indentation inward of interior drilling rod, the sheath that at first slides contacts with the retaining platform of lower seal pipe nipple, when continuing indentation inward again, the spring pressurized, the slip sheath moves on relatively, and back sealing ring shifts out from the slip sheath and enters the lower seal pipe nipple, seals; Otherwise, when interior drilling rod stretches out outward, because the effect of spring, the slip sheath is moved down relatively, lower seal is hidden, thereby lower seal is not directly contacted with cement paste, reduce the wearing and tearing of lower seal, both improved sealing effectiveness, prolong its application life again.The two ends of interior drilling rod are prismatic in addition, and it can transmit big moment of torsion, and interior drilling rod and fixedly be provided with easily between the fixture block and wear pin, and are therefore easy to connect, operation easily.
2. packoff nipple is provided with air vent on the telescopic drill rod of the present utility model, so that interior drilling rod can stretch swimmingly, and the lower seal pipe nipple is provided with clean-out opening and plug, can carry out inside to drilling rod by air vent, clean-out opening and clean, simple to operate, easy to use.
3. telescopic long spiral drilling device of the present utility model is provided with two hydraulic cylinders, the piston rod of hydraulic cylinder can move up the opening-closing type spandrel girder, cement paste in the drilling rod is discharged smoothly, thereby in the outer drilling rod of indentation, when the opening-closing type spandrel girder closed up in addition, the jack at its two ends can align drilling rod automatically easily in making, the piston rod of being convenient to hydraulic cylinder inserts, simplify procedures, handled easily is increased work efficiency.
4. telescopic long spiral drilling device of the present utility model adopts new construction, and its pore-forming is that branch carries out for two sections, so the moment of torsion of unit head can not increase a lot, helps saving power source.
5. the utility model scope of application is wide, especially is applicable to the construction of CFG worker's method, is easy to promotion and implementation, has good social and economic benefit.
Four. description of drawings:
Fig. 1 is the construction schematic diagram of telescopic long spiral drilling device
Fig. 2 is the structural representation of telescopic long spiral drilling device
Fig. 3 is one of vertical view of telescopic long spiral drilling device shown in Figure 2
Fig. 4 be telescopic long spiral drilling device shown in Figure 2 vertical view two
Fig. 5 is the structural representation of telescopic drill rod
Fig. 6 is an A-A sectional drawing shown in Figure 5
Fig. 7 is a B-B sectional drawing shown in Figure 5
Sealed structure chart when Fig. 8 stretches out for the interior drilling rod of telescopic drill rod shown in Figure 5
Sealed structure chart when Fig. 9 is the interior drilling rod indentation of telescopic drill rod shown in Figure 5
Five. the specific embodiment:
Embodiment one: referring to Fig. 5～Fig. 9, among the figure, the interior drilling rod 9 of telescopic drill rod is sleeved in the inner chamber of external spiral drilling rod 12, the two ends of external spiral drilling rod 12 are connected with 14 with a hollow sealing pipe nipple 10 respectively, the upper end of last hollow sealing pipe nipple 10 is connected with guide pin bushing 4, the lower end of following hollow sealing pipe nipple 14 is connected (all right adjunction another one external spiral drilling rod between the two) with augers 15, the intracavity section shape of guide pin bushing 4 and the cross sectional shape of interior drilling rod 9 are complementary, and are provided with detent mechanism between the two; Interior drilling rod 9 lower ends are connected with interior tool joint 11, are respectively equipped with upper and lower sealing mechanism on the periphery of interior tool joint 11, so that be tightly connected with the inner cavity surface of upper and lower packoff nipple 10,14 respectively.Last sealing mechanism is a sealing ring 17, spring 19 is contained in lower seal mechanism, slip sheath 18, awl cap 22, dust ring 20 and lower seal 21, the bottom of interior tool joint 11 is provided with two undergauge step sections, slip sheath 18 is sleeved on the external peripheral surface of undergauge step section, its external surface is provided with dust ring 20, its inner surface bottom is provided with an annular convex ring, awl cap 22 is installed in down the bottom of undergauge step section, and (the two can adopt the type of attachment of carbon steel wire 23 and draw-in groove, also can adopt the type of attachment of screw thread, according to circumstances determine), between the upper surface of the upper ring surface of annular convex ring and following undergauge step section spring 19 is installed, upper surface of anchor ring and awl cap 22 contacts under it, the front portion of awl cap 22 external surfaces is a taper seat, its rear portion is the face of cylinder, and the face of cylinder is provided with lower seal 21, the external surface of lower seal 21 contacts with the bottom of slip sheath 18 inner surfaces, the external surface of dust ring 20 contacts with the inwall of external spiral drilling rod 12, slip sheath 18, the baffle ring that awl cap 22 and following hollow sealing pipe nipple 14 inwall bottoms are provided with is complementary, the upper ring surface of baffle ring can be contacted with the end face of slip sheath 18, and its inner ring surface can contact with the lower seal on the awl cap 22.
Detent mechanism is the semicircle jack that fastening screw 3 and interior drilling rod 9 and guide pin bushing 4 contact and be respectively equipped with on the surface, wherein in drilling rod 9 both ends be provided with the semicircle jack of some respectively so that adapt to the requirement of different hole depths; Last hollow sealing pipe nipple 10 is provided with air-vent 16, and following hollow sealing pipe nipple 14 is provided with clean-out opening and stops up 13.
During use, the upper end of interior drilling rod 9 is connected with actuating unit, by prismatic transfer torque, so the moment of torsion of its transmission is big, helps boring.Interior drilling rod 9 and interior tool joint 11 are hollow structure, and interior drilling rod 9 upper ends are connected with the water delivery mud tube by swivel joint, can use very convenient to cement injection in the boring.
Embodiment two: referring to Fig. 1～Fig. 9, among the figure, the actuating unit 5 of telescopic long spiral drilling device is installed on the lead 7 of boring tower 8, and its upper end is connected with hoisting mechanism 6, so that move up and down, interior drilling rod 9 upper ends of the described telescopic drill rod of embodiment connect with the output shaft of actuating unit 6, a support platform is fixed in the bottom of boring tower 8, this support platform is that supports drill rods limits its swing, it is again the load platform of changing-over drilling rod, hydraulic cylinder 1 is installed on the support platform, the piston rod of hydraulic cylinder 1 and opening-closing type spandrel girder 2 are used, and opening-closing type spandrel girder 2 contains two strutbeams and fixed mount, and wherein the inner end of two strutbeams is hinged on the fixed mount, fixed mount is installed in by sliding sleeve on the lead 7 of boring tower 8, and two strutbeams are opened or can be unclamped or block telescopic drill rod when closing up; And the both ends of two strutbeams are provided with a jack respectively, and when two strutbeams closed up, the jack at two ends can overlap respectively, and hydraulic cylinder 1 is two, and its piston rod upper end can be inserted respectively in the jack at two strutbeam both ends.
Its construction divides six steps to finish as shown in Figure 1: the first step, and the drilling rod contraction state is drilled into maximum hole depth; In second step, the drilling rod contraction state proposes aperture soil clearly; In the 3rd step, drilling rod drops down onto at the bottom of the hole, blocks by opening-closing type spandrel girder 2 in the changing-over position then, extracts out interior drilling rod 9 fixing again; In the 4th step, be drilled into and require hole depth; In the 5th step, drilling rod is carried to the changing-over position and being blocked by opening-closing type spandrel girder 2, and is then that the drilling rod withdrawal is fixing; In the 6th step, drilling rod shrinks and proposes aperture soil clearly.
During the changing-over drilling rod, first two strutbeams with opening-closing type spandrel girder 2 close up the piston rod of clamping 10, two hydraulic cylinders 1 of hollow sealing pipe nipple and insert respectively in the jack of two strutbeams, extract fastening screw 3 this moment, interior drilling rod 9 is stretched out or indentation, insert fastening screw 3 again.When worker's method proceeded to for the 5th step, as carrying out the construction of CFG worker's method, if the cement paste in the drilling rod can not be discharged, certainly will cause the drilling rod internal pressure excessive, to cause drilling rod to be difficult to withdrawal like this, therefore must make hydraulic cylinder 1 prop opening-closing type spandrel girder 2, make on the drilling rod and carry, make simultaneously at the bottom of the cement paste injection hole.When creeping into, pass through in order to make opening-closing type spandrel girder 2 not influence drilling rod, must be with hydraulic cylinder 1 withdrawal, opening-closing type spandrel girder 2 opens.
Packoff nipple 10 is provided with air vent 16 on the telescopic drill rod, so that interior drilling rod 9 can stretch swimmingly, and lower seal pipe nipple 14 is provided with clean-out opening and plug 13, during cleaning, interior drilling rod 9 withdrawals are as long as inject clear water from air vent 16, pull down plug and get final product, simple to operate, easy to use.
Claims (10)
1. telescopic drill rod, contain interior drilling rod, the external spiral drilling rod, augers, wherein interior drilling rod is sleeved in the inner chamber of external spiral drilling rod, be provided with detent mechanism between the two, the front end of external spiral drilling rod is connected with augers, it is characterized in that: the two ends of described external spiral drilling rod are connected with a hollow sealing pipe nipple respectively, the upper end of last hollow sealing pipe nipple is connected with guide pin bushing, the lower end of following hollow sealing pipe nipple is connected with another external spiral drilling rod or augers, the intracavity section shape of guide pin bushing and the cross sectional shape of interior drilling rod are complementary, and are provided with detent mechanism between the two; Interior drilling rod lower end is connected with interior tool joint, is respectively equipped with upper and lower sealing mechanism on the periphery of tool joint in described, so that be tightly connected with the inner cavity surface of upper and lower packoff nipple respectively.
2. telescopic drill rod according to claim 1, it is characterized in that: spring is contained in described lower seal mechanism, the slip sheath, the awl cap, dust ring and sealing ring, the bottom of interior tool joint is provided with two undergauge step sections, the slip sheath is sleeved on the external peripheral surface of undergauge step section, its external surface is provided with dust ring, its inner surface bottom is provided with an annular convex ring, the awl cap is installed in down the bottom of undergauge step section, between the upper surface of the upper ring surface of described annular convex ring and following undergauge step section spring is installed, upper surface of anchor ring and awl cap contacts under it, the front portion of awl cap external surface is a taper seat, its rear portion is the face of cylinder, and the face of cylinder is provided with lower seal, the external surface of lower seal contacts with the bottom of slip jacket inner surface, the external surface of dust ring contacts with the inwall of external spiral drilling rod, described slip sheath, the baffle ring that awl cap and following hollow sealing pipe nipple inwall bottom are provided with is complementary, the upper ring surface of baffle ring can be contacted with the end face of slip sheath, and its inner ring surface can contact with the lower seal on the awl cap.
3. telescopic drill rod according to claim 1 and 2 is characterized in that: described guide pin bushing is an integral structure, or is split-type structural, is connected by bolt by two and half bodies; Described guide pin bushing intracavity section is shaped as regular hexagon, or is square, or is octagon; Drilling rod is a prism in described, the cross sectional shape of its cross sectional shape and guide pin bushing is complementary, or interior drilling rod is made up of the prism at two ends and middle cylinder, and the cross sectional shape of the cross sectional shape of two ends prism and guide pin bushing is complementary, and the cylinder of centre is provided with feather key.
4. telescopic drill rod according to claim 3, it is characterized in that: described detent mechanism is the semicircle jack that fastening screw and interior drilling rod and guide pin bushing contact and be respectively equipped with on the surface, wherein interior two ends of drill portion is provided with the semicircle jack of some respectively, so that adapt to the requirement of different hole depths; The described hollow sealing pipe nipple of going up is provided with air-vent, and following hollow sealing pipe nipple is provided with clean-out opening, and clean-out opening is provided with obstruction.
5. telescopic long spiral drilling device that contains the described telescopic drill rod of claim 1, also contain boring tower, actuating unit and hoisting mechanism, wherein, actuating unit is installed on the lead of boring tower, and its upper end is connected with hoisting mechanism, so that move up and down, it is characterized in that: the interior drilling rod upper end of described telescopic drill rod connects with the output shaft of actuating unit, a support platform is fixed in the bottom of boring tower, hydraulic cylinder is installed on the support platform, the piston rod of hydraulic cylinder matches with the opening-closing type spandrel girder, and the opening-closing type spandrel girder is installed in by fixed mount on the lead of boring tower, and it is opened or can unclamp or block telescopic drill rod when closing up.
6. telescopic long spiral drilling device according to claim 5, it is characterized in that: described opening-closing type spandrel girder contains two strutbeams and fixed mount, wherein the inner end of two strutbeams is hinged on the fixed mount, fixed mount is installed on the lead of boring tower by sliding sleeve, and the both ends of two strutbeams are provided with a jack respectively, and when two strutbeams closed up, the jack of an end can overlap, hydraulic cylinder is two, and its piston rod upper end can be inserted respectively in the jack at two strutbeam both ends.
7. according to claim 5 or 6 described telescopic long spiral drilling devices, it is characterized in that: the interior drilling rod of described telescopic drill rod is sleeved in the inner chamber of external spiral drilling rod, and the two ends of external spiral drilling rod are connected with a hollow sealing pipe nipple respectively, the upper end of last hollow sealing pipe nipple is connected with guide pin bushing, the lower end of following hollow sealing pipe nipple is connected with another external spiral drilling rod or augers, the intracavity section shape of guide pin bushing and the cross sectional shape of interior drilling rod are complementary, and are provided with detent mechanism between the two; Interior drilling rod lower end is connected with interior tool joint, is respectively equipped with upper and lower sealing mechanism on the periphery of interior tool joint, so that be tightly connected with the inner cavity surface of upper and lower packoff nipple respectively.
8. telescopic long spiral drilling device according to claim 7, it is characterized in that: spring is contained in described lower seal mechanism, the slip sheath, the awl cap, dust ring and sealing ring, the bottom of interior tool joint is provided with two undergauge step sections, the slip sheath is sleeved on the external peripheral surface of undergauge step section, its external surface is provided with dust ring, its inner surface bottom is provided with an annular convex ring, the awl cap is installed in down the bottom of undergauge step section, between the upper surface of the upper ring surface of described annular convex ring and following undergauge step section spring is installed, upper surface of anchor ring and awl cap contacts under it, the front portion of awl cap external surface is a taper seat, its rear portion is the face of cylinder, and the face of cylinder is provided with lower seal, the external surface of lower seal contacts with the bottom of slip jacket inner surface, the external surface of dust ring contacts with the inwall of external spiral drilling rod, described slip sheath, the baffle ring that awl cap and following hollow sealing pipe nipple inwall bottom are provided with is complementary, the upper ring surface of baffle ring can be contacted with the end face of slip sheath, and its inner ring surface can contact with the lower seal on the awl cap.
9. telescopic long spiral drilling device according to claim 8 is characterized in that: described guide pin bushing is an integral structure, or is split-type structural, is connected by bolt by two and half bodies; Described guide pin bushing intracavity section is shaped as regular hexagon, or is square, or is octagon; Drilling rod is a prism in described, the cross sectional shape of its cross sectional shape and guide pin bushing is complementary, or interior drilling rod is made up of the prism at two ends and middle cylinder, and the cross sectional shape of the cross sectional shape of two ends prism and guide pin bushing is complementary, and the cylinder of centre is provided with feather key.
10. telescopic long spiral drilling device according to claim 9, it is characterized in that: described detent mechanism is the semicircle jack that fastening screw and interior drilling rod and guide pin bushing contact and be respectively equipped with on the surface, wherein interior two ends of drill portion is provided with the semicircle jack of some respectively, so that adapt to the requirement of different hole depths; The described hollow sealing pipe nipple of going up is provided with air-vent, and following hollow sealing pipe nipple is provided with clean-out opening, and clean-out opening is provided with obstruction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620031225 CN2888058Y (en) | 2006-02-27 | 2006-02-27 | Retractable drill rod and retractable long screw boring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620031225 CN2888058Y (en) | 2006-02-27 | 2006-02-27 | Retractable drill rod and retractable long screw boring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2888058Y true CN2888058Y (en) | 2007-04-11 |
Family
ID=38046632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620031225 Expired - Fee Related CN2888058Y (en) | 2006-02-27 | 2006-02-27 | Retractable drill rod and retractable long screw boring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2888058Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103089170A (en) * | 2013-01-25 | 2013-05-08 | 王汉良 | Extensible drill pipe of long spiral drilling pressure filling pile machine and construction method thereof |
| CN104612657A (en) * | 2014-11-18 | 2015-05-13 | 四川大学 | Device for determining Q, S and T values in combined mode |
| CN112985340A (en) * | 2021-05-20 | 2021-06-18 | 湖南鹏翔星通汽车有限公司 | Hole depth measuring device on anchor rod trolley |
-
2006
- 2006-02-27 CN CN 200620031225 patent/CN2888058Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103089170A (en) * | 2013-01-25 | 2013-05-08 | 王汉良 | Extensible drill pipe of long spiral drilling pressure filling pile machine and construction method thereof |
| CN103089170B (en) * | 2013-01-25 | 2015-10-28 | 王汉良 | Long auger guncreting pile machine telescopic drill rod and construction method thereof |
| CN104612657A (en) * | 2014-11-18 | 2015-05-13 | 四川大学 | Device for determining Q, S and T values in combined mode |
| CN104612657B (en) * | 2014-11-18 | 2017-05-03 | 四川大学 | Device for determining Q, S and T values in combined mode |
| CN112985340A (en) * | 2021-05-20 | 2021-06-18 | 湖南鹏翔星通汽车有限公司 | Hole depth measuring device on anchor rod trolley |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070411 Termination date: 20100227 |