CN207714625U - A kind of prestressing force regulation device of automatic elimination draw - Google Patents
A kind of prestressing force regulation device of automatic elimination draw Download PDFInfo
- Publication number
- CN207714625U CN207714625U CN201721789371.8U CN201721789371U CN207714625U CN 207714625 U CN207714625 U CN 207714625U CN 201721789371 U CN201721789371 U CN 201721789371U CN 207714625 U CN207714625 U CN 207714625U
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- China
- Prior art keywords
- steel plate
- steel
- screw rod
- bearing
- prestressing force
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Links
- 230000008030 elimination Effects 0.000 title claims abstract description 20
- 238000003379 elimination reaction Methods 0.000 title claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 68
- 239000010959 steel Substances 0.000 claims abstract description 68
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 13
- 239000002023 wood Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 210000002435 tendon Anatomy 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Rod-Shaped Construction Members (AREA)
Abstract
A kind of prestressing force regulation device of automatic elimination draw of the utility model belongs to prestressing force beam string structure field；Including the first steel plate, bearing, steel screw rod, the second steel plate, spring and steering block；Open a circular hole in the bottom centre position of first steel plate, bearing is embedded in circular hole, bearing outer ring and the first steel plate weld, steel screw rod and bearing inner race weld, and one end both sides that steel screw rod is welded with bearing polish, the centre position of the second steel plate set there are one the threaded hole that can coordinate with steel screw rod, steel screw rod is stretched out from the threaded hole of the second steel plate, but do not contacted with spring and steering block, spring top is welded with the second steel plate, and spring bottom end is welded with steering block top；The utility model not only can artificially adjust prestressed size before load, can also prestressed size be automatically adjusted according to the level of creep of beam in use, it is easy to use, the amount of deflection of beam is monitored in the artificial adjusting prestressing force of effective solution and regulation and control time and the inaccurate technical problem of size.
Description
Technical field
A kind of prestressing force regulation device of automatic elimination draw of the utility model belongs to prestressing force beam string structure field.
Background technology
Under action of long-term load, engineered wood beams will produce the more apparent deformation of creep, and the amount of deflection of beam is made to increase, and influence
The normal use of building or structures.In prestress engineering wooden frame, creep can also cause loss of prestress, and then influence
The bearing capacity of beam.Although controllable prestressing technique can realize prestressing force regulation and control, artificial adjustment by artificially adjusting
It needs to be monitored the amount of deflection of beam, it is cumbersome, and also the time regulated and controled and size are not easy to accurately control.
Utility model content
In view of the above-mentioned problems, the purpose of this utility model is to provide a kind of regulation and control of the prestressing force of automatic elimination draw
Device.
What the purpose of this utility model was realized in：
A kind of prestressing force regulation device of automatic elimination draw, including the first steel plate, bearing, steel screw rod, the second steel
Plate, spring and steering block；A circular hole is opened in the bottom centre position of first steel plate, and the bearing is embedded in circular hole, institute
It states bearing outer ring and the first steel plate welds, the steel screw rod is welded with bearing inner race, one end of the steel screw rod and bearing welding
Both sides polish, and the centre position of second steel plate is set there are one the threaded hole that can coordinate with steel screw rod, the steel screw rod from
It stretches out, but is not contacted with spring and steering block in the threaded hole of second steel plate, the spring top is welded with the second steel plate, bullet
It is welded with steering block top spring bottom end.
Further, the prestressing force regulation device of a kind of automatic elimination creep, the steering block are equipped with limit hole.
Further, the prestressing force regulation device of a kind of automatic elimination creep, the first steel plate area is than second
Steel plate area is big.
Advantageous effect：
The utility model provides a kind of prestressing force regulation device of automatic elimination draw, the device of the utility model
Before beam enters service stage, by artificially rotating steel screw rod, in beam compressor wire stress carry out disposably, essence
Regulate and control accurately；In the service stage of beam, the utility model is automatically adjusted pre- in beam by spending the larger spring of coefficient without a break
The size of stress, with the increase of the beam deformation of creep, the elastic potential energy being stored in spring releases, and the overwhelming majority is converted into
The strain energy that the beam deformation of creep is consumed when the deformation of creep occurs for such beam, need to only consume what a small amount of external all kinds of loads were done
Work(, and then loss of prestress is avoided to the full extent when the larger deformation of creep occurs for beam, while the amount of deflection for reducing beam increases
Add, whole process need not be manipulated artificially, be automatically performed by the utility model, and the utility model not only can be artificial before load
Adjust prestressed size, additionally it is possible to prestressed size be automatically adjusted according to the level of creep of beam in use, used
It is more convenient, it avoids the regulation and control work in later stage, reduces correlative charges, time and labour saving is saved money, and the artificial adjusting of effective solution is pre-
The technical problem inaccurate to the monitoring of the amount of deflection of beam and regulation and control time and size in stress；
Description of the drawings
Fig. 1 is a kind of prestressing force regulation device of automatic elimination draw position and schematic layout pattern in beam.
Fig. 2 is a kind of prestressing force regulation device front elevation view of automatic elimination draw.
Fig. 3 is a kind of prestressing force regulation device sectional view of automatic elimination draw.
Fig. 4 is bearing elevation.
Fig. 5 is bearing vertical view.
Fig. 6 is steering block front view.
Fig. 7 is steering block sectional view.
Fig. 8 is steering block vertical view.
In figure：1 first steel plate, 2 bearings, 3 steel screw rods, 4 second steel plates, 5 springs, 6 steering blocks, 6-1 limit holes.
Specific implementation mode
Specific embodiment of the present invention is described in further detail below in conjunction with the accompanying drawings.
A kind of prestressing force regulation device of automatic elimination draw, as shown in Fig. 2, including the first steel plate 1, bearing 2, steel
Screw rod 3, the second steel plate 4, spring 5 and steering block 6；Open a circular hole, the bearing in the bottom centre position of first steel plate 1
2 are embedded in circular hole, and Fig. 4 and Fig. 5 are bearing schematic diagram, and 2 outer ring of the bearing is welded with the first steel plate 1, as shown in figure 3, institute
It states steel screw rod 3 to weld with 2 inner ring of bearing, one end both sides that the steel screw rod 3 is welded with bearing 2 polish, to facilitate rotation steel spiral shell
Bar 3, the centre position of second steel plate 4 are set there are one the threaded hole that can coordinate with steel screw rod 3, and the steel screw rod 3 is from the
It stretches out, but is not contacted with spring 5 and steering block 6 in the threaded hole of two steel plates 4, realize that 3 rotation of steel screw rod makes on the second steel plate 4
Lower movement, 5 top of the spring are welded with the second steel plate 4, as shown in fig. 6,5 bottom end of spring is welded with 6 top of steering block, are turned to
Block 6 controls the position and direction of presstressed reinforcing steel, as shown in figure 8, being 6 look down on the rendering of steering block.
Specifically, the prestressing force regulation device of a kind of automatic elimination creep, as shown in fig. 7, being set on the steering block 6
There are limit hole 6-1, presstressed reinforcing steel to be passed through from limit hole 6-1.
Specifically, the prestressing force regulation device of a kind of automatic elimination creep, 1 area of the first steel plate is than the second steel
4 area of plate is big.
A kind of prestressing force regulation device of automatic elimination draw, as shown in Figure 1, position of the utility model in beam
And distribution, the utility model are located at the contact position of the beam span l/3 and l/6 of beam, the upper table of first steel plate 1 of the utility model
Face is be bonded with engineered wood adhesive, and the first steel plate can prevent engineered wood to be locally subject to crushing, in the steering block 6 of the utility model
It equipped with limit hole 6-1, is passed through in the limit hole of presstressed reinforcing steel hole, when being tensioned presstressed reinforcing steel, presstressed reinforcing steel is sliding in limit hole 6-1
Dynamic, when steering block 6 moves up and down, the stress level of presstressed reinforcing steel changes.
Operation principle：Before applying external load, first presstressed reinforcing steel is anchored, then turn steel screw rod 3, makes steering block
6 move down, and then carry out tensioning to presstressed reinforcing steel.The utility model spring 5 is shunk at this time, when tension of prestressed tendon is to proof stress
Stop turn steel screw rod 3, the utility model realizes artificial adjusting prestressing force size；After beam enters service stage, engineered wood is in
Pressured state, it may occur that creep, engineered wood part creep value is very small in short period, answers the amount of deflection and presstressed reinforcing steel of beam
Power does not have larger impact, and with the growth of time, engineered wood creep value increases, and length shortens, the stress level in presstressed reinforcing steel
Declining, after creep occurs for beam, the length of beam shortens, and the stress of presstressed reinforcing steel and engineered wood reduces, and 5 stress of spring also reduces, this
When spring 5 extend, so that steel wire and engineered wood stress is increased, system reaches a new balance；In this process, spring 5 is released
The elastic potential energy overwhelming majority put is converted into timber and the strain energy that the deformation of creep is consumed occurs, and such engineered wood occurs creep and becomes
When shape, a small amount of external loads work done only need to be consumed, that is, reduces the amount of deflection increase of beam, during the use of beam,
It realizes level of creep auto-control of the prestressed size by the utility model according to beam, is not necessarily to manual operation, it is very convenient.
Specific implementation mode two
A kind of application method of the prestressing force regulation device of the automatic elimination draw, includes the following steps：
Step a, with adhesive that the first steel plate 1 is Nian Jie with engineered wood；
Step b, presstressed reinforcing steel is anchored；
Step c, turn steel screw rod 3 makes steering block 6 move down, and then carries out tensioning to presstressed reinforcing steel；
Step d, spring 5 is shunk, tension of prestressed tendon to stopping turn screw rod 3 when proof stress.
Claims (3)
1. a kind of prestressing force regulation device of automatic elimination draw, which is characterized in that including the first steel plate (1), bearing
(2), steel screw rod (3), the second steel plate (4), spring (5) and steering block (6)；It opens in the bottom centre position of first steel plate (1)
One circular hole, the bearing (2) are embedded in circular hole, and bearing (2) outer ring is welded with the first steel plate (1), the steel screw rod
(3) it is welded with bearing (2) inner ring, one end both sides that the steel screw rod (3) is welded with bearing (2) polish, second steel plate (4)
Centre position set that there are one the threaded hole that can coordinate with steel screw rod (3), spiral shell of the steel screw rod (3) from the second steel plate (4)
It stretches out, but is not contacted with spring (5) and steering block (6) in pit, spring (5) top is welded with the second steel plate (4), bullet
It is welded with steering block (6) top spring (5) bottom end.
2. a kind of prestressing force regulation device of automatic elimination draw according to claim 1, which is characterized in that described turn
It is equipped with limit hole (6-1) to block (6).
3. a kind of prestressing force regulation device of automatic elimination draw according to claim 1, which is characterized in that described
One steel plate (1) area is bigger than the second steel plate (4) area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721789371.8U CN207714625U (en) | 2017-12-19 | 2017-12-19 | A kind of prestressing force regulation device of automatic elimination draw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721789371.8U CN207714625U (en) | 2017-12-19 | 2017-12-19 | A kind of prestressing force regulation device of automatic elimination draw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207714625U true CN207714625U (en) | 2018-08-10 |
Family
ID=63056645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721789371.8U Expired - Fee Related CN207714625U (en) | 2017-12-19 | 2017-12-19 | A kind of prestressing force regulation device of automatic elimination draw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207714625U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107882267A (en) * | 2017-12-19 | 2018-04-06 | 东北林业大学 | A kind of automatic prestressing force regulation device and application method for eliminating draw |
| CN111236075A (en) * | 2020-01-21 | 2020-06-05 | 滁州职业技术学院 | External prestressed reinforcement bundle mounting structure of concrete box bridge |
-
2017
- 2017-12-19 CN CN201721789371.8U patent/CN207714625U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107882267A (en) * | 2017-12-19 | 2018-04-06 | 东北林业大学 | A kind of automatic prestressing force regulation device and application method for eliminating draw |
| CN111236075A (en) * | 2020-01-21 | 2020-06-05 | 滁州职业技术学院 | External prestressed reinforcement bundle mounting structure of concrete box bridge |
| CN111236075B (en) * | 2020-01-21 | 2021-07-02 | 滁州职业技术学院 | External prestressed reinforcement bundle mounting structure of concrete box bridge |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180810 |