CN202182847U - Direct-pulling self-locking mechanical direct pulling head - Google Patents
Direct-pulling self-locking mechanical direct pulling head Download PDFInfo
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- CN202182847U CN202182847U CN2011202707485U CN201120270748U CN202182847U CN 202182847 U CN202182847 U CN 202182847U CN 2011202707485 U CN2011202707485 U CN 2011202707485U CN 201120270748 U CN201120270748 U CN 201120270748U CN 202182847 U CN202182847 U CN 202182847U
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- balance
- slide block
- pull bar
- afterburning
- pulls out
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Abstract
A direct-pulling self-locking mechanical direct pulling head comprises a stress application pull rod connected with a drawing instrument and a drawing head connected with the stress application pull rod, wherein the upper part of the stress application pull rod is in threaded connection with a pretension stress application nut; a pulling plate is arranged at the lower end of the stress application pull rod; the drawing head is sleeved on the stress application pull rod between the pretension stress application nut and the pulling plate, and comprises an outer cone, a trivalvular inner cone, a balancing movable cone slide block, a balancing reaction spring and a balancing pressure spring; a tapered groove with smaller upper part and larger lower part is formed on the lower surface of the outer cone; the upper part of the trivalvular inner cone is positioned in the tapered groove, and the taper at the upper part of the trivalvular inner cone corresponds to that of the tapered groove; a guiding device is arranged between the outside wall of the trivalvular inner cone and the inside wall of the tapered groove; and a clamp is arranged at the lower end of the trivalvular inner cone. The mechanical direct pulling head provided by the utility model is simple and convenient to mount and operate, has the characteristics of durability and reusability, and dispenses with binding agent when in use, thereby avoiding pollution to human and environments.
Description
Technical field
The utility model relates to the method for directly pulling out and detects the concrete strength technical field, and the metal that particularly a kind of drawing concrete that is connected on the drawing appearance is used directly pulls out head.
Background technology
The method of directly pulling out detect the concrete strength technology be by China construction quality testing staff on the basis of the experience of the Dynamic Non-Destruction Measurement of having summed up decades; Joint research, a kind of novel concrete Dynamic Non-Destruction Measurement of innovating, developing, have little to structural failure, precision is high, the characteristics of trial stretch wide (be fit to C10-C100 concrete strength detect).The principle that the method for directly pulling out detects the concrete strength technology is through cementing agent (being generally epoxy resin) metal on the drawing appearance directly to be pulled out head and the tested member bonding of concrete; When the intensity of treating cementing agent arrives to a certain degree; Directly pull out head with metal the concrete core sample in the tested member of concrete is extracted, infer the concrete crushing strength of the tested member of concrete then according to the pull strength that records.
Though said method has many advantages; But the shortcoming below also existing: 1, complex operation step; Adopt cementing agent that metal is directly pulled out head and the tested member of concrete bonds such as needs; Also need the tested member of concrete be bored seam flushing, air-dry, treat the cementing agent sclerosis after, just can directly pull out test.2, the running time long, this is because could be bonding after will drying tested member, will wait until also after the bonding that epoxy resin arrives after certain intensity could drawing (the viscose glue sclerosis is also influenced by ambient temperature), so required time of whole process is long.3, there is environmental pollution in viscose glue, especially the metal of extracting is directly pulled out head and heats scarfing cinder, and the pollution that this process produces is even more serious.
The utility model content
The purpose of the utility model provides a kind of self-locking machinery that directly pulls out method and directly pulls out head, solve traditional method of directly pulling out and detect concrete strength technical operation complex steps, long technical matters of running time; And solve the traditional method of directly pulling out and detect the with serious pollution problem of concrete strength technological accumulation and inheritance.
For realizing above-mentioned purpose; The utility model adopts following technical scheme: a kind of self-locking machinery that directly pulls out method directly pulls out head; Comprise afterburning pull bar that is connected with the drawing appearance and the drawing head that is connected with afterburning pull bar; It is characterized in that: the top of the said afterburning pull bar afterburning nut of pretension that has been threaded; The lower end of afterburning pull bar is provided with arm-tie, and said drawing headgear includes Outer Taper, three lobe inner cones, balance and moves cone slide block, balance reaction spring and balance pressure spring on the afterburning pull bar between afterburning nut of pretension and the arm-tie.
Have up-small and down-big awl groove on the lower surface of said Outer Taper; The top of said three lobe inner cones is positioned at the awl groove; And the tapering on the top of three lobe inner cones is corresponding with the tapering of awl groove; The diameter of the upper surface of three lobe inner cones is greater than the diameter of the end face of awl groove, and the lower end of three lobe inner cones is provided with chuck.
Have up big and down small slide block slot on the upper surface of said three lobe inner cones; Said balance move the cone slide block be placed in the slide block slot and balance to move the tapering of cone slide block corresponding with the tapering of slide block slot; Said equalized pressure spring housing moves on the afterburning pull bar between the cone slide block in Outer Taper and balance, and said balance reaction spring is enclosed within balance and moves on the afterburning pull bar between cone slide block and the arm-tie.
Be with Outer Taper additional force holddown spring on the afterburning pull bar between said Outer Taper and the drawing appearance.
Be with thrust bearing on the afterburning pull bar between afterburning nut of said pretension and the Outer Taper, and this thrust bearing is placed in the bearing groove on the upper surface of Outer Taper.
The afterburning pull bar that said balance moves between cone slide block and the arm-tie is provided with boss, and said balance reaction spring is clipped in balance and moves between cone slide block and the boss.
The lower surface of said three lobe inner cones is provided with the arm-tie groove, and said arm-tie is arranged in the arm-tie groove.
Be provided with guide piece between the madial wall of the lateral wall of said three lobe inner cones and awl groove; This guide piece is by the direction recess on the lateral wall that is located at three lobe inner cones; Be located on the madial wall of awl groove, with the corresponding elastic positioning pin in direction recess position, and the spring piston ring that is arranged on the madial wall of arm-tie groove is formed.
Compared with prior art the utlity model has following characteristics and beneficial effect: the utility model is that a kind of mechanical self-latching type directly pulls out head; Its fitting operation is simple and convenient; Be that the method for directly pulling out detects the critical component on the drawing appearance used in the concrete strength method, have characteristics durable in use, reusable.
Need not cementing agent when the utility model uses, so human and environment is not polluted; Simultaneously, owing to no longer need cementing agent, also just no longer need bonding and the step of waiting for the cementing agent sclerosis so the method for directly pulling out detects the concrete strength method, so operation steps significantly reduces, the running time has also obtained shortening; In addition,,, do not receive concrete core sample to do wet influence, do not receive bit wear yet and make the influence of concrete core sample diameter variation so concrete strength detects the influence that can not receive natural temperature owing to no longer need cementing agent.
The appearance of the utility model; Applying of " method of directly pulling out detecting the concrete strength technology " played a role in promoting; This is to become very reliable, economical and efficient because the utility model makes the method for directly pulling out detect the concrete strength technology, during use, only need treat tested molding component after; Can carry out drawing after directly being installed to the utility model on the drawing appearance, the installation of each concrete core sample, drawing time only are about 1 ~ 2 minute.
Description of drawings
Below in conjunction with accompanying drawing the utility model is done further detailed explanation.
Fig. 1 is the structural representation of the utility model.
Fig. 2 is the elevational schematic view of three lobe inner cones.
Fig. 3 is the synoptic diagram of A-A section among Fig. 2.
Fig. 4 be among Fig. 2 from B to the synoptic diagram of seeing.
Fig. 5 is the schematic top plan view of Outer Taper.
Fig. 6 is the synoptic diagram of C-C section among Fig. 5.
Fig. 7 is the user mode synoptic diagram of the utility model.
Reference numeral: 1-Outer Taper; 1.1-bearing groove; 1.2-awl groove; 2-three lobe inner cones; 2.1-chuck; 2.2-slide block slot; 2.3-arm-tie groove; The afterburning pull bar of 3-; 3.1-arm-tie; 3.2-boss; The 4-balance moves the cone slide block; 5-balance reaction spring; 6-equalized pressure spring; 7-Outer Taper additional force holddown spring; The 8-thrust bearing; The afterburning nut of 9-pretension; 10-drawing appearance; The tested member of 11-concrete; The 12-concrete core sample; The 13-direction recess; The 14-elastic positioning pin; The 15-spring piston ring.
Embodiment
Embodiment is referring to Fig. 1, shown in Figure 7; This self-locking machinery that directly pulls out method directly pulls out head; Comprise afterburning pull bar 3 that is connected with drawing appearance 10 and the drawing head that is connected with afterburning pull bar 3; The top of the said afterburning pull bar 3 afterburning nut 9 of pretension that has been threaded; The lower end of afterburning pull bar 3 is provided with arm-tie 3.1, and said drawing headgear includes Outer Taper 1, three lobe inner cones 2, balance and moves cone slide block 4, balance reaction spring 5 and balance pressure spring 6 on the afterburning pull bar 3 between afterburning nut 9 of pretension and the arm-tie 3.1.Be with Outer Taper additional force holddown spring 7 on the afterburning pull bar 3 between said Outer Taper 1 and the drawing appearance 10.
Referring to Fig. 1-6; Have up-small and down-big awl groove 1.2 on the lower surface of said Outer Taper 1; The top of said three lobe inner cones 2 is positioned at awl groove 1.2; And the tapering on the top of three lobe inner cones 2 is corresponding with the tapering of awl groove 1.2, and the diameter of the upper surface of three lobe inner cones 2 is greater than the diameter of the end face of awl groove 1.2, and the lower end of three lobe inner cones 2 is provided with chuck 2.1.
Have up big and down small slide block slot 2.2 on the upper surface of said three lobe inner cones 2; Said balance move cone slide block 4 be placed in the slide block slot 2.2 and balance to move the tapering of cone slide block 4 corresponding with the tapering of slide block slot 2.2; Said equalized pressure spring 6 is enclosed within Outer Taper 1 and balance moves on the afterburning pull bar 3 between the cone slide block 4, and said balance reaction spring 5 is enclosed within balance and moves on the afterburning pull bar 3 between cone slide block 4 and the arm-tie 3.1.In the present embodiment, the afterburning pull bar 3 that balance moves between cone slide block 4 and the arm-tie 3.1 is provided with boss 3.2, and said balance reaction spring 5 is clipped in balance and moves between cone slide block 4 and the boss 3.2.Be with thrust bearing 8 on the afterburning pull bar 3 between afterburning nut 9 of said pretension and the Outer Taper 1, and this thrust bearing 8 is placed in the bearing groove 1.1 on the upper surface of Outer Taper 1.
Referring to Fig. 1, Fig. 2-4, the lower surface of said three lobe inner cones 2 is provided with arm-tie groove 2.3, and said arm-tie 3.1 is arranged in the arm-tie groove 2.3.Be provided with guide piece between the madial wall of the lateral wall of said three lobe inner cones 2 and awl groove 1.2; This guide piece is by the direction recess on the lateral wall that is located at three lobe inner cones 2 13; Be located on the madial wall of awl groove 1.2, with the corresponding elastic positioning pin 14 in direction recess 13 positions, and the spring piston ring 15 that is arranged on the madial wall of arm-tie groove 2.3 is formed.
The principle that the utility model is used for reference prestressed anchor and drill card head designs, be one step up, stressed, force transfer system.Described movably three lobe inner cones 2 are divided into three and break off with the fingers and thumb, and its top is cone, and its underpart is broken the common chuck 2.1 of forming off with the fingers and thumb by three; Clamp in type concrete core sample 12, three lobe inner cones 2 by vertically upward the afterburning pull bar 3 formation axial tension that moves up, the Outer Taper 1 opposite with moving direction forms relative motion; 1 pair three lobe inner cone of Outer Taper 2 forms constraint; Three break inner cone 2 off with the fingers and thumb under the constraint of Outer Taper 1, form the radial force to radially, under the effect of radial force; 2 pairs of concrete core samples 12 of three lobe inner cones apply clamping force; The axial tension of afterburning pull bar 3 is big more, and three to break the radial force that inner cone 2 receives off with the fingers and thumb big more, and is also big more to the clamping force of concrete core sample 12.Because three lobe inner cones 2 shrink to the axle center under the constraint of radial force; The lower end of three lobe inner cones 2 accompanies concrete core sample 12, and three lobe inner cones 2 can move to the axle center, move parallel in order to make three lobe inner cones 2; And upper and lower side balance; It is identical with the Outer Taper tapering that tapering is set in the upper end of inner cone, and the balance that is enclosed within on the afterburning pull bar 3 moves cone slide block 4, along with the radial shrinkage diameter variation; Adjust the axial location that balances move cone slide block 4 through balance reaction spring 5 and balance pressure spring 6, make three lobe inner cones 2 constantly be in parallel and equilibrium state.
The axial force of Outer Taper relative motion in initial; Form through constantly moving afterburning pull bar 3 by the afterburning nut 9 of pretension; In order to reduce the friction force of the afterburning nut 9 external cones 1 of pretension, and then minimizing is to the moment of torsion (if the moment of torsion Mrs can damage core to be detected) of the utility model, and the upper surface of Outer Taper is provided with bearing groove 1.1; Thrust bearing 8 has been installed, so reduced the moment of torsion of external force in the bearing groove 1.1 to the utility model.
The utility model is enclosed within on the concrete core sample 12; And tighten the afterburning nut 9 of pretension; Outer Taper additional force holddown spring 7 is installed between Outer Taper 1 and the drawing appearance 10; Afterburning pull bar 3 passes lifting jack, the pressure transducer with support counter-force, and the afterburning nut 9 of pretension is tightened (employing spanner).
The power that the afterburning nut 9 of former pretension imposes on the utility model is starting force, and what Outer Taper additional force holddown spring 7 applied is additional force, and two power actings in conjunction produce the power of radially holding tightly to three lobe inner cones 2.Additional force is through shaking the oil pump handle, and to the lifting jack pressurization, lifting jack is designed to asynchronous bi-directional configuration; Stretch out initial lifting jack push rod bottom, and externally cone additional force holddown spring 7 is exerted pressure, and exerts pressure for Outer Taper 1; Begin to mobile top push rod after waiting to arrive the bottom terminal point; Under the responsive to axial force of lifting jack, produce straight pull out force upwards, when its straight pull out force value during greater than the tensile strength of concrete core sample 12, concrete core sample 12 is broken.
For appearring in three lobes that prevent three lobe inner cones 2, left and right horizontal moves; At the back of three lobe inner cones 2, mill a direction recess 13 respectively, be symmetrical set three elastic positioning pins 14 in Outer Taper; Because the spring action of elastic positioning pin 14; To produce inside thrust to three lobe inner cones 2, near near three lobe inner cones, 2 reducings, a spring piston ring 15 will be set for this reason, be used for the elastic force of balance elastic positioning pin 14.
Claims (6)
1. a self-locking machinery that directly pulls out method directly pulls out head; Comprise afterburning pull bar (3) that is connected with drawing appearance (10) and the drawing head that is connected with afterburning pull bar (3); It is characterized in that: the top of said afterburning pull bar (3) the afterburning nut (9) of pretension that has been threaded; The lower end of afterburning pull bar (3) is provided with arm-tie (3.1); Said drawing headgear includes Outer Taper (1), three lobe inner cones (2), balance and moves cone slide block (4), balance reaction spring (5) and balance pressure spring (6) on the afterburning pull bar (3) between afterburning nut (9) of pretension and the arm-tie (3.1);
Have up-small and down-big awl groove (1.2) on the lower surface of said Outer Taper (1); The top of said three lobe inner cones (2) is positioned at awl groove (1.2); And the tapering on the top of three lobe inner cones (2) is corresponding with the tapering of awl groove (1.2); The diameter of the upper surface of three lobe inner cones (2) is greater than the diameter of the end face of awl groove (1.2), and the lower end of three lobe inner cones (2) is provided with chuck (2.1);
Have up big and down small slide block slot (2.2) on the upper surface of said three lobe inner cones (2); Said balance move cone slide block (4) be placed in the slide block slot (2.2) and balance to move the tapering of cone slide block (4) corresponding with the tapering of slide block slot (2.2); Said equalized pressure spring (6) is enclosed within Outer Taper (1) and balance moves on the afterburning pull bar (3) between the cone slide block (4), and said balance reaction spring (5) is enclosed within balance and moves on the afterburning pull bar (3) between cone slide block (4) and the arm-tie (3.1).
2. the self-locking machinery that directly pulls out method according to claim 1 directly pulls out head, it is characterized in that: be with Outer Taper additional force holddown spring (7) on the afterburning pull bar (3) between said Outer Taper (1) and the drawing appearance (10).
3. the self-locking machinery that directly pulls out method according to claim 1 directly pulls out head; It is characterized in that: be with thrust bearing (8) on the afterburning pull bar (3) between afterburning nut (9) of said pretension and the Outer Taper (1), and this thrust bearing (8) is placed in the bearing groove (1.1) on the upper surface of Outer Taper (1).
4. the self-locking machinery that directly pulls out method according to claim 1 directly pulls out head; It is characterized in that: the afterburning pull bar (3) that said balance moves between cone slide block (4) and the arm-tie (3.1) is provided with boss (3.2), and said balance reaction spring (5) is clipped in balance and moves between cone slide block (4) and the boss (3.2).
5. the self-locking machinery that directly pulls out method according to claim 1 directly pulls out head, it is characterized in that: the lower surface of said three lobe inner cones (2) is provided with arm-tie groove (2.3), and said arm-tie (3.1) is arranged in the arm-tie groove (2.3).
6. the self-locking machinery that directly pulls out method according to claim 5 directly pulls out head; It is characterized in that: be provided with guide piece between the madial wall of the lateral wall of said three lobe inner cones (2) and awl groove (1.2); This guide piece is by the direction recess (13) on the lateral wall that is located at three lobe inner cones (2); Be located on the madial wall of awl groove (1.2), with the corresponding elastic positioning pin in direction recess (13) position (14), and the spring piston ring (15) that is arranged on the madial wall of arm-tie groove (2.3) is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202707485U CN202182847U (en) | 2011-07-28 | 2011-07-28 | Direct-pulling self-locking mechanical direct pulling head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202707485U CN202182847U (en) | 2011-07-28 | 2011-07-28 | Direct-pulling self-locking mechanical direct pulling head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202182847U true CN202182847U (en) | 2012-04-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202707485U Expired - Fee Related CN202182847U (en) | 2011-07-28 | 2011-07-28 | Direct-pulling self-locking mechanical direct pulling head |
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|---|---|
| CN (1) | CN202182847U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018113A (en) * | 2012-07-11 | 2013-04-03 | 深圳中建院建筑科技有限公司 | Device for detecting concrete compressive strength based on force-guiding lever-type in-situ single shear method |
| CN102866056B (en) * | 2012-09-26 | 2016-09-28 | 深圳中建院建筑科技有限公司 | The straight pulling device of pull-type |
| CN107505206A (en) * | 2017-08-10 | 2017-12-22 | 山东建筑大学 | Automatic multi-function pilot system and method for the test of soil layer anti_floating foundation load-carrying properties |
| CN109490082A (en) * | 2018-12-21 | 2019-03-19 | 廊坊市阳光建设工程质量检测有限公司 | A kind of total cushion cap of Pulling escape detection concrete strength directly pulls out equipment automatically |
-
2011
- 2011-07-28 CN CN2011202707485U patent/CN202182847U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018113A (en) * | 2012-07-11 | 2013-04-03 | 深圳中建院建筑科技有限公司 | Device for detecting concrete compressive strength based on force-guiding lever-type in-situ single shear method |
| CN103018113B (en) * | 2012-07-11 | 2014-09-24 | 深圳中建院建筑科技有限公司 | Device for detecting concrete compressive strength based on force-guiding lever-type in-situ single shear method |
| CN102866056B (en) * | 2012-09-26 | 2016-09-28 | 深圳中建院建筑科技有限公司 | The straight pulling device of pull-type |
| CN107505206A (en) * | 2017-08-10 | 2017-12-22 | 山东建筑大学 | Automatic multi-function pilot system and method for the test of soil layer anti_floating foundation load-carrying properties |
| CN107505206B (en) * | 2017-08-10 | 2023-11-03 | 山东建筑大学 | Automatic multifunctional test system and method for testing bearing performance of soil layer anti-pulling foundation |
| CN109490082A (en) * | 2018-12-21 | 2019-03-19 | 廊坊市阳光建设工程质量检测有限公司 | A kind of total cushion cap of Pulling escape detection concrete strength directly pulls out equipment automatically |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120404 Termination date: 20170728 |
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| CF01 | Termination of patent right due to non-payment of annual fee |