CN104879400A - Reusable fusible plug for hydraulic coupling - Google Patents
Reusable fusible plug for hydraulic coupling Download PDFInfo
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- CN104879400A CN104879400A CN201510151352.1A CN201510151352A CN104879400A CN 104879400 A CN104879400 A CN 104879400A CN 201510151352 A CN201510151352 A CN 201510151352A CN 104879400 A CN104879400 A CN 104879400A
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- China
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- fusible plug
- ferromagnet
- temperature
- fluid coupling
- reusable
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Abstract
The invention relates to the field of temperature protection technologies for torque limited hydraulic couplings, in particular to a reusable fusible plug for a hydraulic coupling. By the aid of the reusable fusible plug, the problem that fusible alloy for existing torque limited hydraulic couplings cannot be reused after being melted to relieve pressures under overload conditions can be solved. The reusable fusible plug has the advantages that ferromagnetic materials with standard temperatures at a Curie point are fixed into a valve spool and a valve seat by the aid of 'Curie effect' principles, so that the fusible plug is in a normally closed state, the valve spool can be opened and closed at temperatures higher than or lower than temperatures of protection points, transmission liquid in an inner cavity of the coupling can be quickly drained under the control when the temperatures reach the limit, and a closed working cavity can be formed by the inner cavity of the coupling after the temperatures are reduced; the fusible plug has a temperature protection function under overload conditions of systems and does not need to be replaced after the temperatures are reduced under shutdown conditions, the systems can be started only after working media are injected into the systems, accordingly, the fusible plug can be reused, and the operability of hydraulic coupling products can be improved.
Description
Technical field
The present invention relates to the technical field of load limiting type of constant filling fluid coupling safety protection, is a kind of for reusable temperature protective device, specifically a kind of reusable fluid coupling fusible plug after fluid coupling overload temperature protection.
Background technique
Mining water medium hydraulic coupler, be mainly used in the drive system of scraper conveyor and disintegrator, because its operating conditions is frequent starting, load is heavier, Start_up inertia is larger, Environmental Conditions is more severe, normal generation overloading, need shutdown maintenance at every turn, the fusible plug more renewed, ability start up system after injection working medium, connect in cover because water medium hydraulic coupler is contained in, the working surface that down-hole is narrower renews fusible plug, operate very difficult, therefore most of user is in order to reduce the operating time, after generation overload low melting alloy fusing release, with hardwood, fusible plug melt channel directly blocks by the things such as iron nail, and more do not renew fusible plug, fluid coupling is caused to lose safety protection, very easily to blast accident.Along with improving constantly of coal production industry mechanization degree, also more and more higher to the requirement of the automation of coal excavation apparatus, operability and Security.As shown in Figure 1, its technology mainly utilizes the characteristic of low melting alloy low melting point to current aqueous medium load limiting type of constant filling fluid coupling fusible plug used, and first low melting alloy melts release, thus plays the effect of protection motor and working machine.Present stage fusible plug in research direction, still adopt the low melting alloy material of low melting point to carry out temperature control, in temperature-control material, do not have breakthrough, fusible plug after completing a temperature protection effect, need change, can not reuse.Adopt low melting alloy control temperature simultaneously; by the impact of batching, cast, thickness size and melting time; scope control can only be carried out and can not realize set point temperature control; therefore, for ensureing the normal use of fluid coupling, needing fluid coupling fusible plug to have and reusing function; temperature protection is carried out in time when overloading; need not change fusible plug after shutting down cooling, only injecting after working medium just can start up system, the operability of raising fluid coupling product.
Summary of the invention
The object of this invention is to provide a kind of reusable fluid coupling fusible plug; can not reuse to solve after existing fusible plug completes temperature protection effect when fluid coupling overloads; the fusible plug that need more renew; cause the problem that fluid coupling operability is low; and due to maintenance work inconvenient, easily cause fluid coupling to lose safety protection effect and the problem that has an accident.
The technical solution adopted for the present invention to solve the technical problems is: be made up of fusible plug pedestal 1, drainage valve 2, ferromagnet I3, valve seat 4, ferromagnet II5.Ferromagnet I3 is embedded in drainage valve 2, and ferromagnet II5 is embedded in valve seat 4, forms powerful magnetic field, under the action of a magnetic force, is enclosed on valve seat 4 by drainage valve 2, makes fusible plug be normally off.Ferromagnet I3, the ferromagnet II5 ferromagnetic substance that uses Curie-point temperature to be temperature protection setting value, fusible plug pedestal 1, drainage valve 2, valve seat 4 use that stainless steel, copper etc. have some strength, material is the Nonferromugnetic material such as stainless steel, copper.When fluid coupling inner chamber driving medium fluid temperature reach and higher than temperature protection setting value time; according to the demagnetization of " curie effect " ferromagnetic substance; drainage valve 2 is mobile under the effect of centrifugal force and liquid, air pressure to be opened; the driving medium of coupler inner chamber is released rapidly; realize temperature protection; when temperature is lower than temperature protection setting value; ferromagnetic substance recovers magnetic; under the action of a magnetic force; drainage valve 2 is closed; fusible plug recovery temperature protective function, makes fusible plug have and reuses function.
The invention has the beneficial effects as follows: by adopting new liquid drainage device and ferromagnetic substance; realize the transmission liquid temperature of fusible plug when system overload in fluid coupling reach and higher than controlling value time; ferromagnet demagnetization; drainage valve 2 immediate unlock; rapid drainage; the rapid release of fluid coupling, protection motor and working machine overload time not damaged.After shutting down cooling, when temperature is lower than controlling value, ferromagnet recovers magnetic; drainage valve 2 is closed; make coupler inner chamber form closed active chamber, fusible plug recovery temperature safety protection function, need not change fusible plug; only injecting after working medium just can start up system; the set point temperature that can realize fluid coupling temperature protection controls, easy to use, improves the operability of fluid coupling product; easy maintenance, reduces costs.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1: the structure principle chart being traditional load limiting type of constant filling fluid coupling fusible plug used.
Fig. 2: the structure principle chart being the reusable fluid coupling fusible plug of the present invention.
In figure: 1, fusible plug pedestal, 2, drainage valve, 3, ferromagnet I, 4, valve seat, 5, ferromagnet II.
Embodiment
As shown in Figure 2, reusable fluid coupling fusible plug by fusible plug pedestal 1, drainage valve 2, ferromagnet I 3, valve seat 4, ferromagnet II 5 forms; Preferably use has some strength to fusible plug pedestal 1, material is the Nonferromugnetic material such as stainless steel, copper, head has polygonal external frame (regular hexagon, square), thus conveniently turn fusible plug, to install or remove this fusible plug, bottom outside is that outside thread is for being arranged on the shell of fluid coupling; The middle upper portion of pedestal 1 has drainage through hole, and middle part is circular port, and bottom is internal thread.
Drainage valve 2 preferably uses has some strength, material is stainless steel, the Nonferromugnetic materials such as copper, be arranged in the central circular hole of fusible plug pedestal 1, top cylindrical and pedestal 1 endoporus are Spielpassung, can in fusible plug pedestal 1 hole on, lower movement, form valve body structure, middle part cylindrical and pedestal 1 endoporus form circular groove and facilitate drainage, bottom cylindrical is conical surface, match can seal with the internal conical surface of valve seat 4, middle upper portion endoporus communicates with radial hole (quantity is 3 ~ 4), the transmission liquid medium entered in circular groove by valve seat 4 through hole can be made to release, middle lower portion endoporus is used for inlaying ferromagnet I 3.
Valve seat 4 preferably uses has some strength, material is stainless steel, the Nonferromugnetic materials such as copper, be fixed on bottom fusible plug pedestal 1 by scyewed joint, the mobile space of drainage valve 2 is limited with the step hole on pedestal 1 top, middle upper portion is that internal conical surface coordinates with the outer conical surface of drainage valve 2, upper by drainage valve 2, lower movement can form opening of fusible plug, close, bottom endoporus is used for inlaying annular ferromagnet II 5, powerful magnetic field is formed with cylindrical ferromagnet I 3, drainage valve 2 is made to be in the bottom of fused plug pedestal 1, due to the seal action of conical surface, fluid coupling fusible plug is made to be normally off.
Ferromagnet I 3 and ferromagnet II 5 uses Curie-point temperature for the ferromagnetic material of the arbitrary temperature value within the scope of national Specification, its performance is: when material temperature reach and higher than controlling value time, ferromagnet demagnetization, when material temperature is lower than controlling value, ferromagnet recovers magnetic; Its mounting point, at the lower curtate of fusible plug, directly contacts with the driving medium water in fluid coupling or oil, driving medium can be made synchronous with ferromagnetic material temperature, and the set point temperature realizing fusible plug controls.
Its working principle is: cylindrical ferromagnet I 3 and annular ferromagnetic body II 5 uses the ferromagnetic substance that Curie-point temperature is any temperature value within the scope of national Specification to be embedded in drainage valve 2 and valve seat 4, powerful magnetic field is produced in fusible plug, drainage valve 2 is made to be in the bottom of fusible plug pedestal 1, due to the seal action of conical surface, the working state of fluid coupling fusible plug is made to be normally off, the temperature of fluid coupling driving medium water when nominal operation is 50 DEG C ~ 70 DEG C, therefore fusible plug is in closed all the time, coupler inner chamber is made to form closed active chamber, transmission liquid temperature when the system is overloaded in fluid coupling raises rapidly, ferromagnet I 3 and ferromagnet II 5 synchronously reach and higher than controlling value time, ferromagnetic material demagnetization, fusible plug internal magnetic field disappears, the driving medium oil of drainage valve 2 in centrifugal force and fluid coupling inner chamber, under the effect of water and vapor pressure, move to rapidly fusible plug pedestal 1 top, fusible plug is opened, driving medium is by the quick drainage of circular groove and each hole, the rapid release of fluid coupling, protection motor and working machine overload time not damaged.After shutting down cooling; when temperature is lower than controlling value; ferromagnet I 3 and ferromagnet II 5 material recover magnetic, and in fusible plug, regenerate powerful magnetic field, drainage valve 2 moves to the bottom of fusible plug pedestal 1 under the action of a magnetic force; fusible plug is closed; closing with valve seat 4 conical surface makes fluid coupling inner chamber form closed active chamber, and fusible plug recovery temperature safety protection function, need not change fusible plug; only injecting after working medium just can start up system, can carry out next temperature protection circulation.This reusable fluid coupling fusible plug, the set point temperature that can realize fluid coupling temperature protection controls, easy to use, improves the operability of fluid coupling product, easy maintenance, reduces costs.
Should be appreciated that above is illustrative and not restrictive by embodiment to the detailed description that technological scheme of the present invention is carried out.Those of ordinary skill in the art can modify to the technological scheme described in each embodiment on the basis of reading specification of the present invention, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technological scheme.
Claims (3)
1. a reusable fluid coupling fusible plug, is characterized in that: be made up of fusible plug pedestal (1), drainage valve (2), ferromagnet I (3), valve seat (4), ferromagnet II (5); Ferromagnet I (3) is embedded in drainage valve (2), ferromagnet II (5) is embedded in valve seat (4), form powerful magnetic field, under the action of a magnetic force, drainage valve (2) is enclosed on valve seat (4), makes fusible plug be normally off.
2. the reusable fluid coupling fusible plug of one according to claim 1, is characterized in that:
Ferromagnet I (3), ferromagnet II (5) use the ferromagnetic substance that Curie-point temperature is temperature protection setting value, and stainless steel, copper etc. have some strength to the use of fusible plug pedestal (1), drainage valve (2), valve seat (4), material is the Nonferromugnetic material such as stainless steel, copper.
3. the reusable fluid coupling fusible plug of one according to claim 1, is characterized in that:
When fluid coupling inner chamber driving medium fluid temperature reach and higher than temperature protection setting value time; according to the demagnetization of " curie effect " ferromagnetic substance; drainage valve (2) is mobile under the effect of centrifugal force and liquid, air pressure to be opened; the driving medium of coupler inner chamber is released rapidly; realize temperature protection; when temperature is lower than temperature protection setting value; ferromagnetic substance recovers magnetic; under the action of a magnetic force; drainage valve (2) is closed; fusible plug recovery temperature protective function, makes fusible plug have and reuses function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510151352.1A CN104879400A (en) | 2015-03-27 | 2015-03-27 | Reusable fusible plug for hydraulic coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510151352.1A CN104879400A (en) | 2015-03-27 | 2015-03-27 | Reusable fusible plug for hydraulic coupling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104879400A true CN104879400A (en) | 2015-09-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510151352.1A Pending CN104879400A (en) | 2015-03-27 | 2015-03-27 | Reusable fusible plug for hydraulic coupling |
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| CN (1) | CN104879400A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107990012A (en) * | 2017-12-05 | 2018-05-04 | 广东正超电气有限公司 | The pressure balance protection structure of distribution box |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001317645A (en) * | 2000-03-02 | 2001-11-16 | Hamai Industries Ltd | Safety valve and integral valve |
| CN201093046Y (en) * | 2007-09-24 | 2008-07-30 | 中煤张家口煤矿机械有限责任公司 | Steel shell aqueous medium hydraulic coupling |
| RU2334101C1 (en) * | 2007-02-07 | 2008-09-20 | Эмиль Игоревич Додулад | Valve sampler device |
| CN203649840U (en) * | 2013-07-09 | 2014-06-18 | 中煤张家口煤矿机械有限责任公司 | Dismounting tool for hydraulic coupling |
-
2015
- 2015-03-27 CN CN201510151352.1A patent/CN104879400A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001317645A (en) * | 2000-03-02 | 2001-11-16 | Hamai Industries Ltd | Safety valve and integral valve |
| RU2334101C1 (en) * | 2007-02-07 | 2008-09-20 | Эмиль Игоревич Додулад | Valve sampler device |
| CN201093046Y (en) * | 2007-09-24 | 2008-07-30 | 中煤张家口煤矿机械有限责任公司 | Steel shell aqueous medium hydraulic coupling |
| CN203649840U (en) * | 2013-07-09 | 2014-06-18 | 中煤张家口煤矿机械有限责任公司 | Dismounting tool for hydraulic coupling |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107990012A (en) * | 2017-12-05 | 2018-05-04 | 广东正超电气有限公司 | The pressure balance protection structure of distribution box |
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Application publication date: 20150902 |