CN105321767A - High-temperature float switch system - Google Patents
High-temperature float switch system Download PDFInfo
- Publication number
- CN105321767A CN105321767A CN201510223346.2A CN201510223346A CN105321767A CN 105321767 A CN105321767 A CN 105321767A CN 201510223346 A CN201510223346 A CN 201510223346A CN 105321767 A CN105321767 A CN 105321767A
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- inwall
- wall
- switch
- float
- housing
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Abstract
The invention discloses a high-temperature float switch system, which generally comprises a shell with a double-wall design, wherein a switch unit is accommodated in an inner wall. The double-wall design comprises the inner wall which is arranged in the external shell; and an intermediate space is preferably arranged between at least one part of the inner wall and an outer wall to receive any vapor which passes through the external shell, so that the vapor is prevented from entering the intermediate space of the inner wall.
Description
Technical field
The present invention relates generally to a kind of float switch, more particularly, relate to a kind of high temperature float switch system used in high temperature environments.
Background technology
Any discussion running through the correlation technique of this specification should not be regarded as one and admit, namely this correlation technique is well-known or defines the part of general knowledge of this area.
Float switch is used to determine the liquid level in tank or other water holding structure.Float switch is electrically connected to pump (as sewage pump, condenser pump), indicating device, alarm, control panel or miscellaneous equipment.Traditional float switch comprises the single wall housing defining annular seal space, both by switch protection in annular seal space and provide buoyancy with floating in a liquid (such as water, waste water).Switch in housing normally comprise there is the ball be arranged in passage two-stage switch, extend to the lever of this passage and be connected to the electric switch of this lever, wherein when first end (as the outer end) of ball at passage, this lever controls this electric switch and is opening and this lever is allowed to extend to this passage thus makes electric switch enter closed condition (or vice versa) when the second end (as the inner) at passage of ball.
The housing of tradition float switch generally includes single wall plastics (as thermoplastics, thermoplastic polymer, polypropylene, Merlon, polycarbonate-ABS alloy, wherein ABS is the abbreviation of acrylonitrile-butadiene-styrene (ABS)), and these plastics are applicable to normal temperature environment.But when float switch needed for hot environment (as liquid is heated to the temperature up to about 100 DEG C (212 ℉)), plastics are not the suitable materials of housing, because plastics are permeable to steam, and steam can enter annular seal space.The example of the hot environment of float switch is the catch pit receiving boiler blow-off, and this boiler blow-off is deliberately discarded to avoid continuing at steam the water that in evaporation process, impurity is concentrated from steam boiler.After steam enters closed cavity, steam condenses thus the electrical contact of corroding in float switch and conducting base.The closed inner chamber that steam enters float switch can significantly reduce the useful life of float switch.
In order to overcome the limitation of float switch plastic casing in hot environment, stainless steel is used to manufacture housing sometimes, and it does not allow entering of steam.The subject matter of the Stainless Steel Shell of float switch is that their manufacture too expensive thus can improve the price of float switch.
Because with the intrinsic problem of correlation technique, have and need the new high temperature float switch system with improving for hot environment.
Summary of the invention
The present invention relates generally to a kind of float switch comprising housing, described housing has double wall design, and it can be contained in the switch element in inwall.Double wall design comprises the inwall be arranged in external shell.Intermediate space prevents water vapour from entering the inner space of inwall with any steam received by external shell preferably at inwall at least partially and between external shell.
Therefore outline, but not widely, features more of the present invention so that its detailed description can be understood better, and can be accepted the current contribution of technology better.Supplementary features of the present invention will be described hereinafter, and be formed in the theme of these claims.In this respect, before at least one embodiment of the present invention is explained in detail, be understandable that, the present invention is not restricted in the application of CONSTRUCTED SPECIFICATION that is that be described below middle proposition or that be described in the drawings or arrangement of components.The present invention can have other embodiment and puts into practice in a variety of different ways and perform., be understandable that, wording used herein and term are the object of description and should be regarded as restriction meanwhile.
Accompanying drawing explanation
When considered in conjunction with the accompanying drawings, other various object of the present invention, characteristic sum advantage subsequently will be familiar with completely, just as it becomes better understood, and wherein same in these views identical or similar portions of Reference numeral instruction, and wherein:
Fig. 1 is an appearance assumption diagram of the present invention.
Fig. 2 is a detonation configuration figure of the present invention.
Fig. 3 is end view of the present invention.
Fig. 4 is outside vertical view of the present invention.
Fig. 5 is bottom external view of the present invention.
Fig. 6 is the sectional view of the hatching 6-6 along Fig. 4.
Fig. 7 is the sectional view of the hatching 7-7 along Fig. 3.
Fig. 8 is the top internal view of the Part II of external shell.
Fig. 9 is the Part II appearance assumption diagram of external shell.
Figure 10 is the sectional view of Part II along the hatching 10-10 of Fig. 9 of external shell.
Figure 11 is the sectional view of Part II along the hatching 11-11 of Fig. 9 of external shell.
Embodiment
general introduction.
Now descriptively turn to accompanying drawing, wherein similar Reference numeral represents similar element in these views, and Fig. 1 to 11 describes high temperature float switch system 10, comprises the housing with double wall design, and it contains the switch element 28 in inwall 22.This double wall design comprises the inwall 22 be arranged in external shell.Intermediate space 32 preferably between the part and external shell of inwall 22 so that any steam received by external shell thus stop steam to enter the inner space 23 of inwall 22.
many walls housing.
Fig. 1 describes the outside of this housing that outer wall 30 is shown.Housing of the present invention comprises two or more wall 22,30, and at least one space which defines between them enters to prevent water steam (with other gas) and contacts with the inner space 23 accommodating switch element 28 thus prevent the corrosion of switch element 28 and associated component.Described multiple wall preferably includes the inwall 22 around switch element 28 and the outer wall 30 around inwall 22.
When two walls 22,30 when showing in accompanying drawing, can be used for the present invention each wall between to create multiple intermediate space 32 more than the walls of two for the present invention.Such as, three walls are used, and wherein have the first wall, limit the second wall in first wall in the first space and limit the 3rd wall in the second wall of second space between which between which
Housing is by the inside sealing to prevent liquid and steam from entering housing.Housing is preferably buoyant to allow the present invention to be used as the float switch 20 in the liquid (as boiler blow-off) of such as water in a liquid further.
Wall 22,30 is manufactured by the nonmetallic materials bearing high temperature.Particularly, wall 22,30 is manufactured by the nonmetallic materials preferably bearing (212 ℉) or higher high temperature up to 100 DEG C.
The wall 22,30 of housing preferably has circular cross sectional shape, as what describe out best in Fig. 7 of accompanying drawing.But wall 22,30 may have different 8 other cross sectional shapes (as square, rectangle, ellipse).
Wall 22,30 preferably manufactures by such as but not limited to plastic material, thermoplastics, thermoplastic polymer, polypropylene, Merlon, acrylonitrile-butadiene-styrene (ABS) (ABS), polycarbonate-ABS alloy.Wall 22,30 comes shaping, such as, but not limited to injection mo(u)lding and rotation molding by various Plastic Forming operation.
inwall.
Fig. 2 and Fig. 6 best describes the inwall 22 be sealed in around switch element 28, and it limits inner space 23.Inner space 23 and switch element 28 seal to prevent entering of liquid and steam by inwall 22.The switch element 28 of inwall 22 and combination in inwall 22 can comprise traditional float switch 20 with the cable 21 therefrom extended, and wherein outer wall 30 is round this traditional float switch 20.Inwall 22 comprises from the outward extending rib element 26 of inwall 22, and this inwall 22 provides interval from the inner surface of outer wall 30.As previously mentioned, inwall 22 is preferably built to contribute to keeping low manufacturing cost compared with use metallic walls by plastic material.
Inwall 22 can be made up of a single structure or the multiple parts linked together in a sealing fashion.When the blow-by of inwall 22 possibility, the water preferably making inwall 22 seal to provide extra protection to prevent from entering through outer wall 30 and other liquid.
outer wall.
Outer wall 30 is formed and is adapted to receive inwall 22 to protect the inner space 23 of inwall 22 and inwall 22 with seal form.Outer wall 30 may have similar in appearance to inwall 22 shape shape, but outer wall 30 may have the shape being different from inwall 22, as long as the inner chamber formed by outer wall 30 is enough large to receive inwall 22.Outer wall 30 is sealed around inwall 22 by end user in the fabrication process or in assembling process.Outer wall 30 can separate produce and market for traditional float switch 20 with inwall 22, and wherein end user installs traditional float switch 20 in the inner chamber of outer wall 30.
Outer wall 30 can comprise 15 multiple parts that can comprise a single structure or link together in a sealing fashion.When the blow-by of outer wall 30 possibility, outer wall 30 is preferably made to seal to reduce the amount of liquid and the steam entered through outer wall 30.
Outer wall 30 preferably includes the Part I 40 connecting Part II 50, as what depict best in Fig. 2 of accompanying drawing.Part II.Manufacturer or end user can settle inwall 22 with the cable 21 in the hole 54 extended outwardly through in Part II 50 in a sealing fashion in Part II 50, then Part I 40 are attached to Part II 50.
Outer wall 30 and inwall 22 preferably include circular cross-sectional region, as shown in Fig. 7 of accompanying drawing.Outer wall 30 further preferably comprises two or more part 40,50, and this part 40,50 attaches mutually in a sealing fashion around inwall 22.Fig. 2 depicts the outer wall 30 of the Part I 40 comprising and have the first openend 42 and the Part II 50 with the second openend 52.Part I 40 is combined with Part II 50, and respective openend 42,44 links together around inwall 22 to form the inner chamber of outer wall 30.Part I 40 is attached to Part II 50 can have been come with traditional float switch 20 by manufacturer or end user.Preferably, the neighboring 6 around the Part II 50 of the second openend 52 comprises the groove 56 extended along whole periphery with circular pattern, wherein forms groove 56 to receive the first outward extending extension 44 of openend 42 from Part I 40.The extension 44 of Part I 40 is attached in the groove 56 of Part II 50 by adhesive, sealant or other immobilization material.In addition, the extension 44 of Part I 40 is attached in the groove 56 of Part II 50 with spin-welding process.
The Part II 50 of outer wall 30 comprises the supporting construction being suitable for supporting the inner of inwall 22 in substantially immovable mode.Supporting construction is best depicting in Fig. 8 to 11 of accompanying drawing.Supporting construction is suitable for and moulding in the neck 24 accepting float switch 20.Supporting construction prevents the edge-to-edge of inwall 22 from moving and prevents the rotation of the inwall 22 in outer wall 30.Supporting construction preferably includes a pair first supporting members 70 and a pair second strutting pieces 76, and it limits the first inward flange 74 and the second inward flange 79 being positioned at rib element 26 opposite side respectively, and this rib element 26 extends along neck 24.In addition, support component 70,76 is preferably included in the first curved element 60 and the second curved element 62 extended between each self supporting element 70,76 further, as what describe best in Fig. 8 of accompanying drawing.Curved element 60,62 is formed as the neck 24 closely accepting inwall 22.In order to provide extra support to the neck 24 around the inwall 22 of float switch 20, Part II 50 further preferably comprises the offside recess 58 receiving the rib element 26 extended from the inside of neck 24, as shown in Fig. 7 and 10 of accompanying drawing.In addition, support component 70,76 preferably includes the first bearing edge 72 and the second bearing edge 78 separately, each bearing edge outwards and up angulation with engage the inwall 22 of float switch 20 angled/part of taper, this float switch 209 extends between neck 24 and the main body of inwall 22.Part II 50 preferably includes further and receives around the epoxy resin of the cable 21 extended from inwall 22 or the medial concavity 59 of other sealant, as shown in Fig. 8 of accompanying drawing, 10 and 11.
Part I 40 comprises hole 54 to receive the cable 21 extended from inwall 22, as shown in Fig. 2 and 6 of accompanying drawing.Sealant is preferably applied to the inside of external shell and provides extra sealing around cable 21 and the interface in hole 54 so that between cable 21 and the Part II 50 of outer wall 30.Hole 54 further preferred size close receipt cable 21 thus have roughly the same or be less than the internal diameter of cable 21 external diameter.
intermediate space.
Intermediate space 32 being formed at least partially and between outer wall 30 preferably at inwall 22.Intermediate space 32 gassy (as air) and being applicable to receives any steam of being entered by outer wall 30 to be provided for the region of steam condensation thus to prevent identical steam from entering inwall 22.Intermediate space 32 can be full of the gas being different from air.When outer wall 30 be arranged at adjacent inner wall 22 and completely without any intermediate space 32 time, preferably, between inwall 22 and outer wall 30, provide intermediate space 32, as Fig. 6 and 7 of accompanying drawing.
Further preferably, intermediate space 32 preferably surrounds 70 percent of the outer surface of inwall 22 thus provides the protection of the increase of the inner chamber of inwall 22.Intermediate space 32 can have various volume, but, preferably, the spacing between the outer surface and the inner surface of outer wall 30 of inwall 22 be at least 1/4 inch to provide enough spacing from any steam entered by outer wall 30.Intermediate space 32 is preferably as shown in the drawings around the space of continuous print substantially of inwall 22, but intermediate space 32 can be included in (or half isolation and non-tight) compartment of the multiple completely isolated and sealing between inwall 22 and outer wall 30.
switch element.
In order to avoid the steam suffering the liquid outside outer wall 30 and entered by outer wall 30 in the inner space 23 that switch element 28 is placed on housing.Switch element 28 can comprise various types of electric switch, such as, but not limited to the mechanical type two-stage switch with opening and closed condition.The switch of other type various can be used for switch element 28, such as mercoid switch and the like.Cable 21 extends through inwall 22 in a sealing fashion and is electrically connected to switch element 28.
the operation of preferred embodiment.
In order to assemble the present invention, the float switch 20 with inwall 22 is arranged in outer wall 30 by user, then seals outer wall 30 to create intermediate space 32 around inwall 22.In assembling process, the cable 21 from inwall 22 extends through aperture 54 in the Part II 50 of outer wall 30.Epoxy resin or other encapsulant are preferably used for the inner surface of cable 21 and outer wall 30 to ensure the suitable sealing between cable 21 and outer wall 30.
The inner of the inwall 22 be made up of neck 24 is arranged in the inherent supporting construction of Part II 50 of outer wall 30, then Part I 40 be arranged on inwall 22 extension 44 on to engage Part II 50 in a sealing manner.The far-end (the rib element 26 as extended from the far-end of inwall 22) of inwall 22 preferably includes the inner surface engagement of the far-end of Part I 40 to retain inwall 22 in the supporting construction in Part II 50, as shown in Fig. 6 of accompanying drawing.The Part I 40 of outer wall 30 and Part II 50 are attached and are sealed to form the inner chamber receiving inwall 22.Outer wall 30 is formed in the intermediate space 32 between outer wall 30 and inwall 22 further when fully assembled, as shown in Fig. 6 and Fig. 7 of accompanying drawing.
In use, user is electrically connected cable 21 and maybe can uses other electronic equipment being received data by float switch 20 to control panel.The present invention is supported the liquid level determined in tank by the cable 21 in tank.When the liquid level in tank rises, required state when float switch 20 depends on the specific level risen to when tank in tank and or close or open.If liquid is when high temperature (such as higher than 100 degrees Fahrenheits), the water vapour in tank or other high-temperature vapour penetrate through 30 of outer wall and enter intermediate space 32.When water vapour enters intermediate space 32 time, water vapor condensation thus prevent from being entered (outer wall 30 is also liquid-tight) by liquid-tight inwall 22.Float switch 20 allows to operate as traditional float switch 20, and the electronic component that the protection of its outer wall 30 is included in the switch element 28 in float switch 20 does not affect by the corrosion by water or hand steam with other thus extends the useful life of float switch 20.
Unless otherwise prescribed, all technology used herein and scientific terminology have the identical meanings usually understood by those skilled in the art of the invention.Although similar or identical method described herein and material practice used in the present invention or test, the materials and methods be applicable to describes above.All publications herein, patent application, patent and other degree allowed with reference to the laws and rules that basis is suitable for are incorporated to herein with their entirety by reference.The present invention can be embodied in other concrete form and not deviate from its spirit or essential attribute, and it is desirable that, the present embodiment is regarded as being exemplary and nonrestrictive in all respects.Any title used in this description just conveniently, does not have the impact of any law or restriction.
Claims (20)
1. a float switch, comprising:
There is the housing of multiple wall; And
Be arranged on the switch element of described housing.
2. float switch according to claim 1, wherein said switch element comprises mechanical switch or mercoid switch.
3. float switch according to claim 2, wherein said mechanical switch comprises the two-stage switch with opening and closed condition.
4. float switch according to claim 1, wherein said housing is sealed and is buoyant in a liquid.
5. float switch according to claim 1, wherein said multiple wall comprises around the inwall of described switch element and the outer wall around described inwall.
6. float switch according to claim 5, wherein said outer wall is sealed around described inwall.
7. float switch according to claim 6, wherein intermediate space is formed at least partially and between described outer wall of described inwall.
8. float switch according to claim 7, wherein said intermediate space surrounds seven ten at least percent of the outer surface of described inwall.
9. float switch according to claim 6, wherein said inwall is sealed around described switch element and is limited an inner space, and wherein said inner space is by described inner wall sealing.
10. float switch according to claim 5, wherein said inwall is sealed around described switch element and is limited an inner space, and wherein said inner space is by described inner wall sealing.
11. float switches according to claim 5, wherein said inwall and described outer wall comprise nonmetallic materials.
12. float switches according to claim 11, wherein said inwall and described outer wall comprise nonmetallic materials.
13. float switches according to claim 5, wherein said inwall comprises the rib element from described inwall toward extension.
14. float switches according to claim 5, wherein said outer wall comprises the Part I being connected to Part II, and wherein said Part I comprises hole to receive the cable extended from described inwall.
15. float switches according to claim 14, the described Part II of wherein said outer wall comprises the supporting construction being suitable for supporting the inner of described inwall in substantially immovable mode.
16. float switches according to claim 5, wherein said inwall comprises traditional float switch with the described switch element in described inwall, and wherein said outer wall 27 is around described traditional float switch.
17. float switches according to claim 1, described multiple wall of wherein said housing comprises nonmetallic materials.
18. float switches according to claim 17, described multiple wall of wherein said housing comprises plastic material.
19. 1 kinds of float switches, comprising:
Have the housing of multiple wall, wherein said housing is sealed and is buoyant in a liquid;
Wherein said multiple wall comprises nonmetallic materials; And
Be arranged on the switch element in described housing, wherein said switch element comprises mechanical switch, and wherein said mechanical switch comprises the two-stage switch with opening and closed condition;
Wherein said multiple wall comprises around the inwall of described switch element and the outer wall around described inwall;
Described outer wall is sealed around described inwall;
Described inwall is sealed around described switch element and is limited an inner space, and described in described inner space, inner space is by described inner wall sealing;
Wherein intermediate space is formed at least partially and between described outer wall of described inwall, and wherein said intermediate space gassy and wherein said intermediate space surround seven ten at least percent of the outer surface of described inwall.
20. float switches according to claim 19, wherein said inwall and described outer wall comprise plastic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510223346.2A CN105321767A (en) | 2015-05-05 | 2015-05-05 | High-temperature float switch system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510223346.2A CN105321767A (en) | 2015-05-05 | 2015-05-05 | High-temperature float switch system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105321767A true CN105321767A (en) | 2016-02-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510223346.2A Pending CN105321767A (en) | 2015-05-05 | 2015-05-05 | High-temperature float switch system |
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| CN (1) | CN105321767A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242787A (en) * | 2019-06-13 | 2019-09-17 | 莱州亚通重型装备有限公司 | A kind of high temperature corrosion-resisting ball-cock assembly |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0151663A1 (en) * | 1984-02-14 | 1985-08-21 | Nordsee Pumpenfabrik GmbH | Float switch |
| US4644117A (en) * | 1985-09-26 | 1987-02-17 | Grimes Richard V | Float switch assembly |
| US5087801A (en) * | 1990-06-19 | 1992-02-11 | S.J. Electro Systems, Inc. | Sphere-actuated float switch |
| CN102456506A (en) * | 2010-10-26 | 2012-05-16 | 司捷易兰姆布斯控制科技（苏州）有限公司 | Floating ball |
| CN103094004A (en) * | 2011-11-03 | 2013-05-08 | 竞陆电子(昆山)有限公司 | Improved structure of floating ball liquid level switch of pure water tank |
-
2015
- 2015-05-05 CN CN201510223346.2A patent/CN105321767A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0151663A1 (en) * | 1984-02-14 | 1985-08-21 | Nordsee Pumpenfabrik GmbH | Float switch |
| US4644117A (en) * | 1985-09-26 | 1987-02-17 | Grimes Richard V | Float switch assembly |
| US5087801A (en) * | 1990-06-19 | 1992-02-11 | S.J. Electro Systems, Inc. | Sphere-actuated float switch |
| CN102456506A (en) * | 2010-10-26 | 2012-05-16 | 司捷易兰姆布斯控制科技（苏州）有限公司 | Floating ball |
| CN103094004A (en) * | 2011-11-03 | 2013-05-08 | 竞陆电子(昆山)有限公司 | Improved structure of floating ball liquid level switch of pure water tank |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242787A (en) * | 2019-06-13 | 2019-09-17 | 莱州亚通重型装备有限公司 | A kind of high temperature corrosion-resisting ball-cock assembly |
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Application publication date: 20160210 |
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