CN212657366U - Lever type adjustable load supporting and hanging frame - Google Patents
Lever type adjustable load supporting and hanging frame Download PDFInfo
- Publication number
- CN212657366U CN212657366U CN202020697692.0U CN202020697692U CN212657366U CN 212657366 U CN212657366 U CN 212657366U CN 202020697692 U CN202020697692 U CN 202020697692U CN 212657366 U CN212657366 U CN 212657366U
- Authority
- CN
- China
- Prior art keywords
- lever
- connecting rod
- load
- hanging
- adjustable connecting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Supports For Pipes And Cables (AREA)
Abstract
The utility model relates to a lever adjustable load gallows belongs to a thermodynamic system gallows technical field. The utility model aims to provide a possess a gallows of "load increases gradually when hoisting point upward displacement" function, including lug, framework, lever, hanging point, main shaft, lower spacing, adjustable connecting rod, counter weight, slider, horizontal spacing, wherein the rigidity component connects into link mechanism with the lower pair. The connecting rod mechanism utilizes the lever principle, and the change of the length of the long arm of the lever generates the effect of increasing the load of the support and hanger in the movement process, thereby realizing the function of gradually increasing the load when the lifting point moves upwards; the length of the adjustable connecting rod can be adjusted within a certain range, and the adjustable connecting rod has the function of adjusting the load change rate. The method can be used for controlling the sinking of the piping system, improving the deformation of the pipeline, optimizing the stress state of the piping system and the like.
Description
Technical Field
The utility model belongs to the technical field of a gallows, concretely relates to a pipeline gallows that uses at thermodynamic system.
Background
Various thermal pipelines exist in thermal systems (such as thermal power generation, petrochemical industry, metallurgy and other systems), including steam pipelines, steam-water pipelines and the like. The support and hanger is an important component of a pipeline system and comprises various components or devices which are used for bearing load, limiting displacement, controlling vibration and transmitting the load to a bearing structure (such as a civil foundation and the like), and the normal service of the support and hanger has important significance for the safe and stable operation of various heat distribution pipelines.
At present, the commonly used support and hanger of the thermodynamic system include a variable force spring support and hanger (hereinafter referred to as a spring hanger), a constant force spring support and hanger (hereinafter referred to as a constant hanger), a rigid support and hanger, a sliding (rolling) support and the like. In engineering, a spring crane and a constant crane are commonly used for bearing loads in the vertical direction generated by self weight and displacement change in the cold and hot change process of a pipeline, when a lifting point moves downwards, the spring crane can realize gradual increase of the loads, and otherwise, when the lifting point moves upwards, the loads are gradually reduced; the constant hoisting realizes the basic constancy of the load. It can be seen that the two types of supports and hangers lack the important function of gradually increasing the load when the hanging point is displaced upwards. This function has a range of requirements in practical engineering applications, such as: the device is used for controlling the pipe system sinking caused by the wall thickness deviation, the heat preservation weight deviation and the like of the manufactured pipeline; the device is used for improving the deformation (such as deformation control of upper and lower suspension type tube panels in a circulating fluidized bed boiler) caused by the fact that the upward free expansion displacement cannot be realized due to the insufficient rigidity of the pipeline; the method makes it possible to perform cold-state zero suspension and hot-state zero suspension simultaneously in the analysis and calculation of the stress of the pipe system, so as to improve the stress level of the pipe system and reduce the stress and torque of the equipment port.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a possess when "hoisting point upwards displacement load increase gradually" and a gallows of "load rate of change is adjustable" function to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the present invention provides the following technical solutions.
In the cold state, the balance weight is in the original position and suspends the suspended object through the lever, and the suspended object (such as a pipeline and the like) is in the cold state position.
In the thermal state, the lever gradually moves upwards along with the hanging object, the lever rotates downwards for a certain angle around the fulcrum, meanwhile, the counterweight is pushed outwards to the end position after the far end of the lever under the action of the link mechanism, and the hanging object (such as a pipeline and the like) is in the thermal state position.
Compared with the prior art, the utility model has the advantages of it is following: the supporting and hanging frame realizes the hanging of the hanging object by utilizing the lever principle; the function that the load is gradually increased when the lifting point moves upwards is realized by using the connecting rod mechanism; the length of the connecting rod can be adjusted, and the connecting rod has a load change rate adjusting function. The full-mechanical metal structure is adopted, and the device has the characteristics of compact structure, simple manufacturing process, convenience and quickness in installation, stability in operation, convenience in load adjustment and the like.
Drawings
Fig. 1 is a schematic view of an embodiment of the present invention.
Fig. 2 is a schematic view of a link mechanism according to the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
The lever type adjustable load support and hanger of the embodiment comprises components of a lifting lug 1, a frame body 2, a lever 3, a hanging point 4, a main shaft 5, a lower limit 6, an adjustable connecting rod 7, a balance weight 8, a sliding block 9 and a horizontal limit 10, as shown in fig. 1. The frame body 2, the lever 3, the main shaft 5, the adjustable connecting rod 7 and the sliding block 9 are connected into a connecting rod mechanism by a lower pair. The hanging point 4 is hinged with the lever 3 after hanging a hanging object, the sliding block 9 can slide on the lever 3 after hanging the balance weight 8, the lever 3 rotates around the main shaft 5 fixed on the frame body 2, the adjustable connecting rod 7 rotates around a hinged point fixed on the frame body 2, the adjustable connecting rod 7 is hinged with the sliding block 9, the lower limit 6 is fixed on the frame body 2, the horizontal limit 10 is fixed on the lever 3, and the lifting lug 1 is connected with a basic structure after hanging the frame body 2.
In the cold state, the sliding block 9 and the hanging counterweight 8 are in the original position, and the hoisted object (such as a steam pipeline and the like) is in the cold state position by "prying" the hoisted object through the lever 3. The weight, initial position and displacement of the counterweight 8 are determined according to the lever principle.
In a hot state, the hoisted object needs to be upwards displaced to a hot state position along with the expansion of the pipeline, the short arm of the lever 3 gradually upwards rotates along with the hoisted object, the long arm downwards rotates for a certain angle around the main shaft 5 (pivot), and meanwhile, the sliding block 9 and the hanging counterweight 8 outwards move to a terminating position after being pushed to the far end of the lever 3 under the action of the adjustable connecting rod 7.
By adjusting the length of the adjustable connecting rod 7, the motion parameters of the connecting rod mechanism can be changed correspondingly, and the adjusting function of load change rate is realized (see the detailed description in the example calculation).
When the lever 3 may exceed the lower stroke due to an unexpected reason, the lower limit 6 prevents the lever from going down continuously; the horizontal stop 10 will prevent the slider 9 from flying off when the slider 9 may be disengaged from the lever due to accidental causes.
Formula for calculation
As can be seen from the schematic diagram of the link mechanism in fig. 2, the movement locus of the slider moves in a circular motion with a radius r around the fulcrum O' while sliding on the lever. Through the trigonometric function relation, a function expression and related parameters between the distance (b) of the slide block from the fulcrum O and the lever rotation angle (alpha) can be obtained.
The known conditions are: the distance (L) between the two fulcrums O and O', the radius (r) of the adjustable connecting rod and the length (a) of the short arm of the lever.
(1) The function expression: b2+L2-r2-2bL COSα=0
Obtaining: b = (2LCOS α ± ((2LCOS α)2-4×（L2-r2)) -2)/2
It can be seen that the relationship between the length b and the angle α is a quadratic equation with trigonometric functions.
(2) And (3) calculating the limit stroke of the sliding block: the link mechanism is at the limit stroke position when α =0 °, and COS α =1 is substituted into the functional expression: b2+L2-r2-2bL COS α =0, yielding: (b-L) 2 = r2
Namely: the long-range point = L + r, the short-range point = L-r, and the practical application is a long-range point.
(3) Dead point calculation of the link mechanism: when the lever is tangent to the circular track of the slider (circular motion with radius r around the fulcrum O'), the dead point of the link mechanism is reached, i.e.: α = arcsin (r/L). When designing, the selection of L, r and alpha should be noted to avoid the lever reaching the dead point during the rotation process.
(4) Supporting and hanging frame load: g1= (b × G2)/a, where G2 is a weight load.
(5) Load change rate: Δ G1
Example calculation
The method comprises the following steps of setting a short arm a =200mm, setting a distance L =650mm between two fulcrums O and O', setting an adjustable connecting rod length r = 350-450 mm, and substituting a function expression: b2+L2-r2-2bL COS α =0, the value range of the actual application α is: when the lifting point upward displacement working condition is simulated at 15-0 degrees and the counterweight G2=2000N (namely 200Kg counterweight), the lever long arm b, the support and hanger load G1 and the load change rate delta G1 are obtained:
r =350 mm: b =935 to 1000 (mm), G1=9350 to 10000 (N), Δ G1= 7%;
r =400 mm: b =991 to 1050 (mm), G1=9910 to 10500 (N), Δ G1= 6%;
r =450 mm: b = 1045-1100 (mm), G1= 10450-11000 (N), Δ G1= 5%.
It can be seen that the change of the long arm b of the lever causes the load G1 of the support and hanger to increase, thereby realizing the support and hanger with the function of gradually increasing the load when the lifting point moves upwards; since b is determined by L, r, and r can be adjusted within a certain range, namely the support and hanger has the function of adjusting the load change rate.
The embodiment described above only expresses the utility model discloses a concrete implementation way, not deviating from the utility model discloses under the prerequisite of design, still can improve and change technical scheme according to the test demand, if change adjustable connecting rod 7's control range, change distance and lever length etc. between two fulcrums in order to adapt to various gallows application environment, also all belong to the utility model discloses a protection scope, the utility model discloses a protection scope should use appended claim as the standard.
Claims (3)
1. A lever type adjustable load supporting and hanging bracket is characterized by comprising a lifting lug 1, a frame body 2, a lever 3, a hanging point 4, a main shaft 5, a lower limit 6, an adjustable connecting rod 7, a balance weight 8, a sliding block 9 and a horizontal limit 10; wherein,
the hanging point 4 is hinged with the lever 3 after hanging a hanging object, the sliding block 9 can slide on the lever 3 after hanging the balance weight 8, the lever 3 rotates around the main shaft 5 fixed on the frame body 2, the adjustable connecting rod 7 rotates around a hinged point fixed on the frame body 2, the adjustable connecting rod 7 is hinged with the sliding block 9, the lower limit 6 is fixed on the frame body 2, the horizontal limit 10 is fixed on the lever 3, and the lifting lug 1 is connected with a basic structure after hanging the frame body 2.
2. A lever type adjustable load support and hanger as claimed in claim 1, wherein: the link mechanism, namely the frame body 2, the lever 3, the main shaft 5, the adjustable connecting rod 7 and the slide block 9 are connected into the link mechanism by a lower pair.
3. A lever type adjustable load support and hanger as claimed in claim 1, wherein: the length of the adjustable connecting rod 7 can be adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020697692.0U CN212657366U (en) | 2020-04-30 | 2020-04-30 | Lever type adjustable load supporting and hanging frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020697692.0U CN212657366U (en) | 2020-04-30 | 2020-04-30 | Lever type adjustable load supporting and hanging frame |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212657366U true CN212657366U (en) | 2021-03-05 |
Family
ID=74766397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020697692.0U Active CN212657366U (en) | 2020-04-30 | 2020-04-30 | Lever type adjustable load supporting and hanging frame |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212657366U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113586808A (en) * | 2020-04-30 | 2021-11-02 | 广西壮族自治区特种设备检验研究院 | Lever type adjustable load supporting and hanging frame |
| CN114251412A (en) * | 2021-11-09 | 2022-03-29 | 山东佳能科技股份有限公司 | Balanced constant-force furnace tube hanger |
-
2020
- 2020-04-30 CN CN202020697692.0U patent/CN212657366U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113586808A (en) * | 2020-04-30 | 2021-11-02 | 广西壮族自治区特种设备检验研究院 | Lever type adjustable load supporting and hanging frame |
| CN113586808B (en) * | 2020-04-30 | 2025-11-04 | 广西壮族自治区特种设备检验研究院 | A lever-type adjustable load support bracket |
| CN114251412A (en) * | 2021-11-09 | 2022-03-29 | 山东佳能科技股份有限公司 | Balanced constant-force furnace tube hanger |
| CN114251412B (en) * | 2021-11-09 | 2023-12-08 | 山东佳能科技股份有限公司 | Balance type constant force furnace tube hanger |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212657366U (en) | Lever type adjustable load supporting and hanging frame | |
| JPH0211987A (en) | Suspension system for load displaced and moved | |
| CN108091405B (en) | Rolling support device for primary reactor circuit and primary reactor equipment | |
| CN110203831A (en) | The total-sliding-mode control method of bridge type crane system | |
| CN104803015B (en) | Large lift air supporting high-precision gravity relief arrangement | |
| CN205745670U (en) | Force balance type high-precision large-stroke constant-force spring hanger | |
| CN105628349B (en) | A kind of rigidity adjustable double airvane equivalent load simulator | |
| CN113586808A (en) | Lever type adjustable load supporting and hanging frame | |
| CN102748569B (en) | Lifting device of display | |
| CN114662234A (en) | Pipeline mechanical state evaluation method | |
| CN211234891U (en) | Broadband torsional vibration test system | |
| CN112283485A (en) | Low constant force dish spring gallows | |
| CN214579663U (en) | Low constant force dish spring gallows | |
| CN107588275B (en) | Pressure balance type expansion joint of transverse self-bearing elbow | |
| CN209029114U (en) | Multidirectional slidably supported device for reactor vessel | |
| CN110657312B (en) | Energy balance-based compact constant-force spring support and hanger cam curve design method | |
| CN103267690A (en) | Double-swing-rod impact testing machine | |
| CN209520547U (en) | A kind of device for leaf spring installation procedure | |
| CN207034393U (en) | A kind of device for being used to reduce slewing ozzle load | |
| CN205350551U (en) | Follow formula constant hangers | |
| CN216158489U (en) | Spring hanger assembly with horizontal displacement compensation function | |
| CN207418140U (en) | A kind of mechanical compensation formula constant force load-bearing hanger | |
| CN2160826Y (en) | Inlet pipe for smoke machine | |
| CN120251793A (en) | Green constant force dynamic support and pipeline support method for long-distance heat transmission pipes in mountainous areas | |
| CN111720629A (en) | A low-profile linear constant-force spring support hanger |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |