CN113586808A - Lever type adjustable load supporting and hanging frame - Google Patents
Lever type adjustable load supporting and hanging frame Download PDFInfo
- Publication number
- CN113586808A CN113586808A CN202010361293.1A CN202010361293A CN113586808A CN 113586808 A CN113586808 A CN 113586808A CN 202010361293 A CN202010361293 A CN 202010361293A CN 113586808 A CN113586808 A CN 113586808A
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- China
- Prior art keywords
- lever
- connecting rod
- hanging
- load
- adjustable connecting
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/08—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing
- F16L3/10—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing divided, i.e. with two or more members engaging the pipe, cable or protective tubing
- F16L3/11—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing divided, i.e. with two or more members engaging the pipe, cable or protective tubing and hanging from a pendant
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/16—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets with special provision allowing movement of the pipe
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/15—Correlation function computation including computation of convolution operations
Abstract
The invention relates to a pipeline support and hanger used in a thermodynamic system, and belongs to the technical field of support and hangers. 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 invention belongs to the technical field of supporting and hanging frames, and particularly relates to a pipeline supporting and hanging frame used in a 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.
Disclosure of Invention
The invention aims to provide a support and hanger frame with functions of gradually increasing load when a hanging point moves upwards and adjusting load change rate, so as to solve the problems in the background technology.
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 invention has the following advantages: 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 diagram of an embodiment of the present invention.
Fig. 2 is a schematic view of a linkage mechanism of 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 in the embodiment comprises 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 above-mentioned embodiment only represents a specific implementation manner of the present invention, and on the premise of not departing from the concept of the present invention, the technical solution may be modified and changed according to the testing requirements, for example, the adjustment range of the adjustable connecting rod 7 is changed, the distance between two supporting points and the lever length are changed to adapt to various supporting and hanging frame application environments, and the protection scope of the present invention also belongs to the protection scope of the present invention, and the protection scope of the present invention shall be subject to the appended claims.
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 content of the first and second substances,
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 |
|---|---|---|---|
| CN202010361293.1A CN113586808A (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 |
|---|---|---|---|
| CN202010361293.1A CN113586808A (en) | 2020-04-30 | 2020-04-30 | Lever type adjustable load supporting and hanging frame |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113586808A true CN113586808A (en) | 2021-11-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010361293.1A Pending CN113586808A (en) | 2020-04-30 | 2020-04-30 | Lever type adjustable load supporting and hanging frame |
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| CN (1) | CN113586808A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 CN202010361293.1A patent/CN113586808A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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