CN202756846U - Constant force support rack of heat distribution pipeline support - Google Patents
Constant force support rack of heat distribution pipeline support Download PDFInfo
- Publication number
- CN202756846U CN202756846U CN 201220355685 CN201220355685U CN202756846U CN 202756846 U CN202756846 U CN 202756846U CN 201220355685 CN201220355685 CN 201220355685 CN 201220355685 U CN201220355685 U CN 201220355685U CN 202756846 U CN202756846 U CN 202756846U
- Authority
- CN
- China
- Prior art keywords
- knife
- force
- guide rails
- main spring
- shaped guide
- 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.)
- Expired - Lifetime
Links
Images
Landscapes
- Supports For Pipes And Cables (AREA)
Abstract
The utility model provides a constant force support rack of a heat distribution pipeline support. A main spring is arranged on a loading pipe and fixed by a main spring platen, secondary springs are arranged on both inner sides of an outer frame, two knife-shaped guide rails are arranged on the outer frame through rotary shafts, the secondary springs on both sides are connected with the two knife-shaped guide rails through secondary spring platens, and two groups of idler wheels are connected with the two knife-shaped guide rails. When the loading pipe is functioned by external force, and the idler wheels conduct up-down motion along the two knife-shaped guide rails and press the main spring. In the different motion positions, swinging of the two knife-shaped guide rails enables the secondary springs to be compressed or stretched, joint force in the vertical direction forms linear change and shows the feature which is the same direction or the opposite direction with force of the main spring, and achieves constant force L which is output by the loading pipe in a whole motion process. The constant force support rack of the heat distribution pipeline support has the advantages that force balance principle design is adopted, so that the constant force support rack of the heat distribution pipeline support is simple and reasonable in structure technology, small in friction pair, and convenient to use, install and maintain. Meanwhile, constancy degree is less than 4%, load can largely exceed 200 kiloewtons and combined, and precision fully meets the demands for large-capacity and high-performance equipment.
Description
Technical field
The utility model relates to and a kind ofly prop up the constant supporting spring hanger that hangs for heat distribution pipelines such as power plant, petrochemical plant, Iron And Steel Plant, belong to pipeline and prop up and hang technical field.
Background technique
Along with the fast development of national economy, the demand of electric power, petroleum chemicals, iron and steel etc. is presented the situation that is higher than economic growth rate, within the quite a long period, electric power, petrochemical industry and steel construction will keep higher growth rate; It is exactly to need to use a large amount of heat distribution pipelines that these industries have common characteristics, and in service because the counter-force effect that thermal walking produces for fear of equipment in a lot of occasions, need to adopt constant force device to its suspention or support, thereby reach when producing thermal walking, no matter thermal walking increases, reduces or disappears, can obtain constant active force.
Along with the continuous increase of installed power and improving constantly of performance, also more and more higher to the requirement of constant supporting spring hanger precision.At present, the constant supporting spring hanger that China adopts has mainly been used for reference American I TT.G standard, adopt principle of moment balance, because the restriction of this body structure of product and the restriction of processing technology, the load of this series products generally is no more than 200KN and can't makes up, invariance degree can't satisfy the performance requirement of this occasion generally greater than 6%.
Summary of the invention
The utility model proposes a kind of constant supporting spring hanger based on force balance principle, the highi degree of accuracy that is intended to satisfy fully the pipelines such as thermal power plant, petrochemical plant, Iron And Steel Plant is propped up and is hung requirement.Adopt force balance principle, structure is advanced, friction pair is few, and precision is high, and invariance degree is installed simple less than 4%.
Technical solution of the present utility model: its structure is at the load pipe main spring to be installed, this main spring is fixed by the main spring pressing plate, external frame two installed inside counterbalance springs at constant hanger, by rotating shaft 2 knife-edge guide rails are installed on the external frame, the counterbalance spring of both sides links to each other with the knife-edge guide rail by auxiliary spring bearer plate, two groups of rollers that load pipe top is passed through link to each other with the knife-edge guide rail, when the load pipe is subjected to External Force Acting, roller moves up and down along the knife-edge guide rail, the compressing main spring, diverse location in motion, the swing of knife-edge guide rail makes the also compressed or stretching of the auxiliary spring in both sides, their making a concerted effort because the special shape of knife-edge guide rail is linear change and shows as identical with main spring power or rightabout feature in the vertical direction, thus realize that the power L that exports at the load pipe is invariable in whole movement process.
Advantage of the present utility model: this constant supporting spring hanger adopts force balance principle and designs, structure, technique advantages of simple, friction pair are few, the use installation and maintenance are convenient, precision is high, invariance degree is less than 4%, the load of constant supporting spring hanger can substantially exceed 200KN and capable of being combined, and the precision of constant supporting spring hanger satisfies the demand of large capacity, high-performance equipment fully.
Description of drawings
Accompanying drawing 1 is the structure diagram of constant supporting spring hanger.
Accompanying drawing 2 is fundamental diagrams.
Accompanying drawing 3 is knife-edge movement curve figure.
Accompanying drawing 4 is graph of relation of Δ F and t.
Accompanying drawing 5 is graph of relation of Δ F and t.
Embodiment
Contrast accompanying drawing 1, its structure is at load pipe A main spring B to be installed, this main spring B fixes by the main spring pressing plate, the auxiliary spring C of external frame two installed inside at constant supporting spring hanger, by rotating shaft 2 knife-edge guide rail D are installed on the external frame, the auxiliary spring C of both sides links to each other with the knife-edge guide rail by auxiliary spring bearer plate, load pipe top links to each other with the knife-edge guide rail by two groups of roller E, when the load pipe is subjected to External Force Acting, roller E moves up and down along the knife-edge guide rail, the compressing main spring, diverse location in motion, the swing of knife-edge guide rail makes the auxiliary spring in both sides also compressed or stretch, their making a concerted effort because the special shape of knife-edge guide rail is linear change and shows as identical with main spring power or rightabout feature in the vertical direction, thus realize that the power L that exports at the load pipe is invariable in whole movement process.
Determine that the power L that exports at the load pipe is invariable:
Definitely constant for satisfying pulling force, according to the parallelogram of forces rule, the force direction of two auxiliary spring horizontal directions of precompression is opposite, and the interaction of the elastic force by main spring and the composite force of two auxiliary springs makes the power of vertical direction on the load pipe invariable.In the working procedure, suspended load power
LA acts directly on the main spring B by the central load pipe.The composite force of two precompressed auxiliary spring C by knife-edge guide rail D and roller E adjection on load pipe A.Main spring power and make a concerted effort mobilely with loading in the stroke range changes with the variation of the setting angle of the shape of spring constant and knife-edge guide rail and knife-edge guide rail.
As can see from Figure 2, main spring power and displacement are linear, make a concerted effort to remain constant.
Concrete mathematical derivation is as follows:
Set up the mathematical model of this constant force device, the differential equation of the knife-edge guide rail profilogram of having derived.Force analysis by to load pipe and knife-edge guide rail has:
Simultaneous two formulas get:
Because knife-edge guide rail pendulum angle is unsuitable excessive, prevent that auxiliary spring place from producing excessive error, gets
Then
,
, getting according to being total to origin conversion theorem Euler in addition, plane altogether origin transformation matrix is:
That is:
=
Because main shaft is all the time along axial-movement, roller contacts motion of point with the knife-edge guide rail and can be approximated to be distance
The straight line of axle
Therefore
By following formula as can be known, when
Value when determining, make a concerted effort with coordinate (
,
) pressure angle α and the k at this some place
2Relevant, not constant with joint efforts, along with the movement of load pipe, constantly change.
According to above formula, further derivation can get:
As can be seen from the above equation, when
Value when determining, make a concerted effort with coordinate (
,
) and
Relevant, namely tentatively determined power
LVariation and the relation between point of contact motion track and the auxiliary spring rigidity.
Utilize Matlab that knife-edge guide rail profile line equation is found the solution, and the draw outline curve.If the load of constant force device is 5kN in certain series of this product, stroke is 150mm,
e=15mm,
a=30, l=200, h=150, according to the constant force device working principle, as shown in Figure 2, and when load pipe A runs to middle end, F
1=L=5KN, according to the Hooke theorem,
Suppose power
LConstant is 5KN, utilizes Matlab to carry out Program, obtains the movement locus of point of contact, i.e. the profilogram of knife-edge guide rail, and as shown in Figure 3, wherein curve 1 is K
2=2.5K
1=166.67KN/mm, curve 2 is K
2=2K
1=133.33KN/mm.
As seen from Figure 3, the main elasticity coefficient ratio with main and auxiliary spring of the curve shape of knife-edge guide rail is relevant, and when the main and auxiliary elasticity coefficient ratio that helps spring was larger, the curve of knife-edge guide rail was more crooked, otherwise then tends towards stability.
In Adams, set up the constant force device simulation model, and utilized this simulation model to analyze the invariance degree of this device.According to the point on the curve of obtaining among the programming software matlab, modeling in PRO E is set up each assembly that constant force hangs and is assembled into threedimensional model, threedimensional model is imported again and carries out further perfectly among ADMS-Views, adds driving and constraint, carries out emulation.
Add one along the at the uniform velocity to-and-fro motion of y axle at the load pipe, measure the variation of the power of kinematic pair between load pipe and frame and relation such as Fig. 4 of time t.So,
F
max=5KN+121N=5124N,
F
min=5000N+9.6N=5009.6N
So invariance degree is:
If select k
2=3k
1=200.01 KN/mm, use the same method can obtain as shown in Figure 5 Δ F and the relation of time t.
F
max=5KN+97.13N=5097.13N,
F
min=5000N+18.03N=5018.03N
So invariance degree is:
From above two examples as can be known different rigidity correspondence different invariance degree, when constant force device designs, should choose many group rigidity, calculate respectively invariance degree, carry out invariance degree relatively, select minimum invariance degree value.
Claims (1)
1. heat distribution pipeline props up the constant supporting spring hanger that hangs, it is characterized in that main spring being installed bearing at the load pipe, this main spring is fixed by the main spring pressing plate, the auxiliary spring of external frame two installed inside at constant hanger, by rotating shaft 2 knife-edge guide rails are installed on the external frame, the auxiliary spring of both sides links to each other with the knife-edge guide rail by auxiliary spring bearer plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220355685 CN202756846U (en) | 2012-07-23 | 2012-07-23 | Constant force support rack of heat distribution pipeline support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220355685 CN202756846U (en) | 2012-07-23 | 2012-07-23 | Constant force support rack of heat distribution pipeline support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202756846U true CN202756846U (en) | 2013-02-27 |
Family
ID=47736029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220355685 Expired - Lifetime CN202756846U (en) | 2012-07-23 | 2012-07-23 | Constant force support rack of heat distribution pipeline support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202756846U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788197A (en) * | 2012-07-23 | 2012-11-21 | 高勇 | Constant force support lifting frame for support lifting of thermal power pipelines |
-
2012
- 2012-07-23 CN CN 201220355685 patent/CN202756846U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788197A (en) * | 2012-07-23 | 2012-11-21 | 高勇 | Constant force support lifting frame for support lifting of thermal power pipelines |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102788197A (en) | Constant force support lifting frame for support lifting of thermal power pipelines | |
| CN101871870B (en) | Semi-automatic steel anvil rating device of resiliometer | |
| CN202756846U (en) | Constant force support rack of heat distribution pipeline support | |
| CN205745670U (en) | Force balance type high-precision large-stroke constant-force spring hanger | |
| CN203845668U (en) | Pipeline sling using roller linear guide rail for horizontal movement | |
| CN204173467U (en) | A kind of belt roller regulates support | |
| CN104075034B (en) | A kind of Bidirectional slide pipe support bearing two-way normal load | |
| CN205926721U (en) | Camber arch machine | |
| CN204961417U (en) | Novel electric wind machine shock attenuation frame | |
| CN204278036U (en) | A kind of carbon fiber mechanical arm | |
| CN203877332U (en) | Sectional conveying device | |
| CN204320820U (en) | A kind of lifting skirt plate structure with edger roll | |
| CN203917415U (en) | A kind ofly for high-speed wire production line, pinch roll bending let-off gear(stand) | |
| CN203553621U (en) | Power transformation framework lattice beam sliding support | |
| CN204365928U (en) | Stage clip makes servicing unit | |
| CN105835042A (en) | Three-freedom-degree energy-saving robot mechanism | |
| CN205386615U (en) | Reinforcing bar device of flare -outing for construction machinery | |
| CN205437821U (en) | Lateral movement device | |
| CN204171234U (en) | A kind of formed reinforcing steel bars device | |
| CN209623923U (en) | Electric Appliance Cabinet crimping tool pressure measuring unit | |
| CN204320813U (en) | The transition apparatus that roller-way is replaced temporarily | |
| CN202245244U (en) | Vertical sliding guide-positioning mechanism | |
| CN202300971U (en) | Inspection device of V-shaped iron pump shaft | |
| CN202521134U (en) | Double expansion joint with diamond draw bar | |
| CN203903367U (en) | Mine belt conveyor buffer carrier roller and buffer device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: JIANGSU DALICHENG ELECTRIC CO., LTD. Free format text: FORMER OWNER: GAO YONG Effective date: 20130806 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130806 Address after: New town Yangzhong city Jiangsu province 212211 Zhenjiang New Village Patentee after: JIANGSU DALICHENG ELECTRICAL Co.,Ltd. Address before: 212211 Jiangsu city of Zhenjiang province Jiangsu new town village of Yangzhong city public security dalicheng Electric Co. Ltd. Patentee before: Gao Yong |
|
| CX01 | Expiry of patent term |
Granted publication date: 20130227 |
|
| CX01 | Expiry of patent term |