CN110029822B - Tension adjusting device for cable-supported wood beam - Google Patents
Tension adjusting device for cable-supported wood beam Download PDFInfo
- Publication number
- CN110029822B CN110029822B CN201910374870.8A CN201910374870A CN110029822B CN 110029822 B CN110029822 B CN 110029822B CN 201910374870 A CN201910374870 A CN 201910374870A CN 110029822 B CN110029822 B CN 110029822B
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- Prior art keywords
- tension
- cable
- wood
- unit
- screw
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- 239000002023 wood Substances 0.000 title claims abstract description 57
- 230000006835 compression Effects 0.000 claims abstract description 16
- 238000007906 compression Methods 0.000 claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 5
- 239000010720 hydraulic oil Substances 0.000 description 6
- 230000007423 decrease Effects 0.000 description 5
- 239000003921 oil Substances 0.000 description 5
- 230000007774 longterm Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/342—Structures covering a large free area, whether open-sided or not, e.g. hangars, halls
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
Abstract
A tension adjusting device of a cable support wood beam consists of an automatic tension maintaining unit, a tension display unit and a tension adjusting unit. The tension adjusting unit consists of two screws with opposite screw threads, one screw is integrally arranged with a supporting rod of the cable supporting wood beam, the other screw is integrally arranged with the movable end of the tension display unit, the tension automatic retaining unit is fixed on the wood beam, and a compression spring is arranged through an inner sleeve and an outer sleeve which can slide relatively. Thus, the tension of the cable-strut wood beam can be adjusted by rotating the nut in the tension adjusting unit, the tension is read by the pressure gauge in the tension display unit, and the tension is kept by the compression spring in the tension automatic keeping unit. The tension adjusting device of the cable-strut beam has the advantages of simple structure, convenient use, accurate adjustment, long-acting tension maintenance and suitability for medium-and large-scale cable-strut beams with larger spans.
Description
Technical Field
The invention relates to a tension adjusting device for a cable-strut wood beam, in particular to a tension adjusting device for a cable-strut wood beam, which uses a spiral mechanism, an oil cylinder and a compression spring and displays the tension, and is suitable for a large-span cable-strut wood beam.
Background
Currently, known cable corbels (including cable corbels, and the like) are mainly composed of beams (including steel beams, wood beams, and the like), steel cables, struts, tension adjusting devices, and the like. The tension adjusting device mainly comprises a screw rod and a nut which are arranged on the supporting rod, and the length of the supporting rod is adjusted by rotating the screw rod or the nut, so that the tension of the steel cable is adjusted. Since the tension cannot be displayed, it is difficult to accurately adjust the tension of the cable-strut beam, and the tension can be adjusted only approximately empirically. After the cable supporting beam works for a period of time, stress relaxation of the steel cable occurs due to expansion with heat, contraction with cold, creep and the like; for cable-supported wood beams, wood beams (including solid wood beams, glued wood beams and the like) can generate creep and stress relaxation under long-term working load due to the change of moisture content, temperature and the like. The tension of the cable will drop rapidly once the stress of the cable and/or wood beam is relaxed, and the tension of the cable corbel should be readjusted. However, since the tension is not displayed, it is difficult to adjust the tension in time without knowing the degree of tension drop. After the beam is found to have obvious deformation (downwarping), the beam is often difficult to recover from the deformation, and irreparable loss is caused.
If the tension of the cable-strut wood beam can be displayed, and the tension of the cable-strut wood beam can be effectively kept for a long time without rapid decline when stress relaxation occurs in the steel cable and/or the wood beam, the tension of the cable-strut wood beam can be timely and accurately adjusted, the adjustment frequency can be effectively reduced, and the cable-strut wood beam is very popular with users.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: aiming at the defects that the tension of the existing cable-supported wood beam cannot be displayed, and the tension of the existing cable-supported wood beam can be rapidly reduced due to stress relaxation of a steel cable and/or the wood beam, and the tension of the existing cable-supported wood beam cannot be accurately, timely and long-effectively adjusted, the tension adjusting device for the cable-supported wood beam, which can display the tension and effectively maintain the tension, can accurately, timely and long-effectively adjust the tension.
In order to solve the technical problems, the invention adopts the following technical scheme: the tension adjusting device for the cable-supported wood beam is characterized by comprising a tension adjusting unit, a tension display unit and an automatic tension holding unit; the tension adjusting unit consists of a nut, a first screw rod and a second screw rod, wherein the first screw rod and the second screw rod are respectively screwed at two ends of the interior of the nut, and the thread directions of the first screw rod and the second screw rod are opposite; the second screw rod is integrally arranged with a supporting rod of the cable-stayed wood beam, the first screw rod is integrally arranged with the movable end of a hydraulic cylinder of the tension display unit, and the hydraulic cylinder is connected with a pressure gauge; the tension automatic retaining unit is arranged between the hydraulic cylinder and a wood beam of the cable-stayed wood beam, and a compression spring is propped between the wood beam and the hydraulic cylinder.
The tension automatic maintaining unit further comprises an inner sleeve and an outer sleeve; one end of the inner sleeve is fixed on the wood beam, and the other end of the inner sleeve is provided with an outer step; one end of the outer sleeve is fixed on the hydraulic cylinder, the other end of the outer sleeve is provided with an inner step, the outer sleeve can slide up and down relative to the inner sleeve, and the tension automatic retaining unit is ensured not to be separated from the tension display unit through the inner step and the outer step; the compression spring is arranged in the accommodating space formed by the inner sleeve and the outer sleeve.
The tension automatic retaining unit also comprises a base, the inner sleeve is fixed with the wood beam through the base, and two ends of the compression spring are respectively propped against the base and the hydraulic cylinder.
The hydraulic cylinder is a piston type hydraulic cylinder or a plunger type hydraulic cylinder, and the movable end is a piston rod or a plunger rod.
Therefore, the tension adjusting device can realize tension adjustment of the cable-strut beam by rotating the nut in the tension adjusting unit, and automatically maintain the tension in a certain range. The tension is read in real time through a pressure gauge in the tension display unit, and the effective maintenance of the tension is realized by a compression spring in the tension automatic maintaining unit. The tension adjusting device for the cable-strut beam has the advantages of simple structure, convenient use, accurate adjustment or long-acting tension maintenance, and is suitable for medium-sized and large-sized cable-strut beams with larger spans.
Drawings
Fig. 1 is a schematic view of the overall structure of the cable tie beam of the present invention.
Fig. 2 is a schematic diagram of the structural working principle of the tension adjusting device of the present invention.
Detailed Description
Referring to fig. 1 and 2, the present invention is a tension adjusting apparatus for a cable-supported wooden beam, which is the same as the prior art, and mainly includes a wooden beam 1, a wire rope 2 and a strut 3, wherein both ends of the wire rope 2 are anchored at both ends of the wooden beam 1, respectively, and the wire rope 2 passes through a bearing groove 31 at the lower end of the strut 3 and supports the strut 3, thereby supporting the wooden beam 1. And the tension adjusting device is composed of a tension adjusting unit 4, a tension display unit 5 and a tension automatic holding unit 6, wherein:
the tension adjusting unit 4 is composed of a nut 41, a first screw 42, and a second screw 43. The first screw rod 42 and the second screw rod 43 are respectively screwed at two ends of the interior of the nut 41 and have opposite screw thread directions; the thread directions of the two ends of the inside of the nut 41 respectively correspond to the threads of the first screw 42 and the second screw 43; and the second screw 43 is integrally provided with the strut 3;
the tension display unit 5 is composed of a hydraulic cylinder 51 and a pressure gauge 52. The hydraulic cylinder 51 is a piston type hydraulic cylinder or a plunger type hydraulic cylinder, and in the present embodiment, a piston type hydraulic cylinder is taken as an example, and a piston rod 511 of the hydraulic cylinder 51 is integrally provided with the first screw 42; the pressure gauge 52 is connected with the hydraulic oil 512 of the hydraulic cylinder 51 through an oil pipe 53, so that the hydraulic pressure generated by the pressure of the hydraulic oil 512 is transmitted to the pressure gauge 52 through the oil pipe 53 to display the pressure value;
the tension automatic holding unit 6 is composed of a base 61, an inner sleeve 62, a compression spring 63, and an outer sleeve 64. The base 61 is fixed on the lower surface of the wood beam 1; one end of the inner sleeve 62 is fixed on the base 61, and the other end is provided with an outer step 621; one end of the outer sleeve 64 is fixed on the cylinder 513 of the hydraulic cylinder 51, the other end is provided with an inner step 641, the outer sleeve 64 can slide up and down relative to the inner sleeve 62, and the inner and outer steps (641, 621) can ensure that the tension automatic retaining unit 6 cannot be separated from the tension display unit 5; the compression spring 63 is disposed in the accommodating space formed by the inner sleeve 62 and the outer sleeve 64, and both ends thereof are respectively abutted against the base 61 and the cylinder 513.
In use, when the nut 41 of the tension adjusting unit 4 is turned, the first screw 42 and the second screw 43 move in opposite directions due to the opposite screw directions, and the rod 3 expands and contracts. The nut 41 is rotated to extend the rod 3 downward, the wire rope 2 is gradually tensioned, the tension of the wire rope is reacted to the rod 3 through the pressure-receiving groove 31 and transmitted to the piston rod 511 through the tension adjusting unit 4, and the hydraulic oil 512 acting on the tension display unit 5 is pressed to generate hydraulic pressure, and the hydraulic pressure is transmitted to the pressure gauge 52 through the oil pipe 53 to display the pressure value. At the same time, the force acting on the supporting rod 3 is transmitted to the tension automatic holding unit 6 through the tension adjusting unit 4 and the tension display unit 5, so that the compression spring 63 compresses to be balanced with the reaction force of the tension from the steel cable 2 acting on the end bearing groove 31 of the supporting rod 3. Continuing to rotate the nut 41, the rod 3 continues to extend downwards, the tension of the wire rope 2 further increases, the hydraulic oil 512 is further pressurized, the oil pressure continues to rise (the reading of the pressure gauge 52 increases), and the compression spring 63 is further compressed. When the pressure displayed on the pressure gauge 52 reaches the set upper limit, the rotation of the nut 41 is stopped, and the pressure of the hydraulic oil 512 and the tension of the wire rope 2 are automatically maintained by the energy stored in the compression spring 63. When the wire rope 2 and/or the wooden beam 1 are stress-relaxed for some reason, the energy accumulated by the compression spring 63 compensates for it so as to avoid a rapid drop in the tension of the wire rope 2 and the pressure of the hydraulic oil 512. The cable-supported wood beam works for a long time under the load, the tension of the cable 2 gradually and slowly decreases, the pressure value displayed on the pressure gauge 52 gradually and slowly decreases, and when the pressure value decreases to the set lower limit value, the nut 41 is turned again until the pressure displayed on the pressure gauge 52 reaches the set upper limit value. The tension of the cable support wood beam can be accurately adjusted by repeating the steps, and the tension of the cable support wood beam can be automatically kept within a certain range. Therefore, the tension adjusting device for the cable-strut wood beam has the advantages of simple structure, convenient use, accurate adjustment and long-term tension maintenance, and is suitable for medium-sized and large-sized cable-strut wood beams with larger spans.
In this way, the device can realize tension adjustment of the cable-strut beam by rotating the nut in the tension adjusting unit 4, the tension can be read in real time through the pressure gauge 52 in the tension display unit 5, and the effective maintenance of the tension is realized by the compression spring 63 in the tension automatic maintaining unit 6. Thus, the pressure displayed by the pressure gauge is checked at regular intervals (e.g., half a year, two months), and when the pressure value thereof decreases to the set lower limit value, the nut is turned again until the pressure displayed on the pressure gauge reaches the set upper limit value again. So reciprocating, the tension of the cable-strut beam can be ensured to be kept in a reasonable range continuously. The tension required for the cable 2 and the support force required for the strut 3 involved can be calculated (or estimated) on the basis of relevant parameters, such as the span of the cable-strut beam 1, the size of the load to be carried, etc.
In a preferred embodiment, the wood beam 1 is a solid wood straight beam, a glued wood straight beam (span less than 10 m), a glued wood curved beam (span less than 20 m), a wood truss or the like.
In a preferred embodiment, the nut 41 is a hexagonal nut or a power nut (driven by a motor), etc.
Claims (5)
1. The tension adjusting device of the cable-supported wood beam mainly comprises a wood beam (1), a steel cable (2) and a supporting rod (3), wherein two ends of the steel cable (2) are respectively anchored at two ends of the wood beam (1), the steel cable (2) supports the supporting rod (3) through a pressure-bearing groove (31) at the lower end of the supporting rod (3) so as to further support the wood beam (1), and the tension adjusting device is characterized by comprising a tension adjusting unit (4), a tension display unit (5) and a tension automatic retaining unit (6); the tension adjusting unit (4) consists of a nut (41), a first screw (42) and a second screw (43), wherein the first screw (42) and the second screw (43) are respectively screwed at two ends inside the nut (41), and the screw thread directions of the first screw (42) and the second screw (43) are opposite; the second screw rod (43) is integrally arranged with the supporting rod (3) of the cable supporting wood beam, the first screw rod (42) is integrally arranged with the movable end of the hydraulic cylinder (51) of the tension display unit (5), and the hydraulic cylinder (51) is connected with a pressure gauge (52); the tension automatic holding unit (6) is arranged between the hydraulic cylinder (51) and the wood beam (1) of the cable-supported wood beam, and a compression spring (63) is propped between the wood beam (1) and the hydraulic cylinder (51); the tension automatic maintaining unit (6) further comprises an inner sleeve (62) and an outer sleeve (64); one end of the inner sleeve (62) is fixed on the wood beam (1), and the other end is provided with an outer step (621); one end of the outer sleeve (64) is fixed on the hydraulic cylinder (51), the other end is provided with an inner step (641), the outer sleeve (64) can slide up and down relative to the inner sleeve (62), and the tension automatic retaining unit (6) is ensured not to be separated from the tension display unit (5) through the inner step (641) and the outer step (621); the compression spring (63) is arranged in the accommodating space formed by the inner sleeve (62) and the outer sleeve (64).
2. A tension adjusting device for a cable-supported wooden beam as claimed in claim 1, wherein the tension automatic holding unit (6) further comprises a base (61), and the inner sleeve (62) is fixed to the wooden beam (1) by the base (61).
3. A tension adjusting device for a cable-strut wood beam as in claim 1, wherein the hydraulic cylinder (51) is a piston cylinder or a ram cylinder.
4. A tension adjusting device for a cable-supported wooden beam as claimed in claim 1, wherein the wooden beam (1) is a solid wood straight beam, a veneer wood curved beam or a wood truss.
5. A tension adjusting device for a cable-strut wood beam as in claim 1, wherein the nut (41) is a hex nut or a power nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910374870.8A CN110029822B (en) | 2019-05-07 | 2019-05-07 | Tension adjusting device for cable-supported wood beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910374870.8A CN110029822B (en) | 2019-05-07 | 2019-05-07 | Tension adjusting device for cable-supported wood beam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110029822A CN110029822A (en) | 2019-07-19 |
| CN110029822B true CN110029822B (en) | 2024-03-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910374870.8A Active CN110029822B (en) | 2019-05-07 | 2019-05-07 | Tension adjusting device for cable-supported wood beam |
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| Country | Link |
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| CN (1) | CN110029822B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1046388A (en) * | 1989-04-13 | 1990-10-24 | 浙江省建筑科学研究所 | Gentle rope component detection method of wire tensioning force and detector |
| CN2704036Y (en) * | 2004-04-14 | 2005-06-08 | 赵勋海 | Pretightening dynamometer for prestressed structure |
| CN103183268A (en) * | 2011-12-28 | 2013-07-03 | 株式会社日立建筑系统 | Rope tension adjusting device and rope tension adjusting system |
| CN106586849A (en) * | 2016-12-27 | 2017-04-26 | 中国冶集团有限公司 | Automatic adjusting device and method of crane auxiliary bracing |
| CN210086843U (en) * | 2019-05-07 | 2020-02-18 | 中南林业科技大学 | Tension adjusting device of cable-supported wood beam |
-
2019
- 2019-05-07 CN CN201910374870.8A patent/CN110029822B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1046388A (en) * | 1989-04-13 | 1990-10-24 | 浙江省建筑科学研究所 | Gentle rope component detection method of wire tensioning force and detector |
| CN2704036Y (en) * | 2004-04-14 | 2005-06-08 | 赵勋海 | Pretightening dynamometer for prestressed structure |
| CN103183268A (en) * | 2011-12-28 | 2013-07-03 | 株式会社日立建筑系统 | Rope tension adjusting device and rope tension adjusting system |
| CN106586849A (en) * | 2016-12-27 | 2017-04-26 | 中国冶集团有限公司 | Automatic adjusting device and method of crane auxiliary bracing |
| CN210086843U (en) * | 2019-05-07 | 2020-02-18 | 中南林业科技大学 | Tension adjusting device of cable-supported wood beam |
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| Publication number | Publication date |
|---|---|
| CN110029822A (en) | 2019-07-19 |
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