CN102099641B - Sight glass assembly - Google Patents
Sight glass assembly Download PDFInfo
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- CN102099641B CN102099641B CN200880130437.XA CN200880130437A CN102099641B CN 102099641 B CN102099641 B CN 102099641B CN 200880130437 A CN200880130437 A CN 200880130437A CN 102099641 B CN102099641 B CN 102099641B
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- main body
- glass
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- ring
- sighting glass
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/006—Fluid-circulation arrangements optical fluid control arrangements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/02—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by gauge glasses or other apparatus involving a window or transparent tube for directly observing the level to be measured or the level of a liquid column in free communication with the main body of the liquid
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Joining Of Glass To Other Materials (AREA)
- Laser Beam Processing (AREA)
Abstract
A sight glass assembly (300) comprises a main body (310) which has an annular extension (320), the annular extension (320) defines a bore (321) which communicates with a cavity (312) formed in the main body (310); and a cylindrical or disk- like glass member (330), which is firmly held in the bore (321) of the annular extension (320), achieving a gas and fluid tight sealing between the periphery of the glass member (330) and the inner surface of the annular extension (320). The main body (310) is made of stainless steel, and the glass member (330) is joined to the annular extension (320) through sintering process. And a process of joining a stainless steel member and a glass member (330) by sintering is provided.
Description
Technical field
The present invention relates to a kind of liquid-sighting glass and engage the technique of stainless steel part and glass workpiece by sintering.
Background technology
Well-known in the art, liquid-sighting glass is so that can visual examination or the state of monitoring container or ducted fluid.Take refrigeration system as example, liquid-sighting glass is in order to the flowing of monitoring system cold-producing medium, height state or situation and water content, in order to determine whether refrigeration system is in normal operating conditions.
Fig. 1 is the longitudinal profile view of traditional liquid-sighting glass.As shown in Figure 1, liquid-sighting glass 100 comprises the main body 110 of being made by brass; Two joint tubulatures 120 and 130 are secured to main body 110.Main body 110 generally is columnar and has hole 111, and the cavity 112 that diameter increases is formed in the center.Main body 110 also is provided with annular extension 113, and in order to hold transparent cylinder or discoid 150 and to form the counterbore that is communicated in cavity 112, annular shoulder 115 is formed in cavity 112 therewith between the counterbore.Annular groove 116 is formed on the inner surface 117 of annular extension 113 to put sealing ring 160, and the latter is made by teflon.Cylinder or discoid 150 by making such as transparent materials such as glass, are contained among the annular extension 113, as shown in Figure 1; Secondly, sealing ring 160 is received within the annular groove 116.After installing cylinder or discoid 150 and sealing ring 160, the edge of annular extension 113 is bent inwards in order to sealing ring 160 is pressed on cylinder or discoid 150.
Liquid-sighting glass 100 also comprises supporting member 170 and indicator 180.As shown in Figure 1, supporting member 170 comprises spring 171 and suspension 172, and the latter is the form of sleeve of end sealing.Suspension 172 is fixed among the recess 118 that is formed on cavity 112 inner surfaces, and spring 171 is received within the suspension 172, and indicator 180 is arranged between spring and the member 150.Because the biasing force of spring, indicator 180 is in place by holding.
In the use, liquid-sighting glass 100 connects in a suitable manner or is connected to fluid transfer conduit with being connected by two conduits 120.When flow during through liquid-sighting glass, can check to monitor the various situations of certain fluid, such as the flowing of fluid, highly, state or situation and water content.
For traditional liquid-sighting glass, main body is made with brass by forge hot, thereby this liquid-sighting glass has relatively good anticorrosion properties.
But, this class liquid-sighting glass has some shortcomings.
1. made by relatively costly brass owing to main body, so this liquid-sighting glass valency is high.
2. support structure is complicated, and is in place because it needs suspension to hold spring, causes the number of spare parts increase and thereby causes production cost to increase.
3. because supporting member is arranged in the flow channel of fluid, and flow resistance has increased, cause energy consumption to increase.
4. glass workpiece is held by the edge of the annular extension 113 that bends inwards, and thereby the poor and bad sealing effectiveness of pressure tolerance.
In addition, known a kind of for the conventional sintering technique of jointing metal spare with glass workpiece.But, traditional sintering process is only in order to the sintering metalwork of being made by special steel and the glass workpiece of being made by specific glass.Special steel is the teleoseal as alloy material, be specifically designed to metal-glass and engage, and specific glass is 7052 glass.Moreover, need to use additive for sintering process adds.So, adopting traditional sintering circuit, the product of sintering is very expensive and glass is opaque after standing sintering circuit.
So, needing a kind of liquid-sighting glass, it can be worked under higher operating pressure and have preferably anticorrosion properties, and a kind of sintering process for engaging stainless steel part and glass workpiece.
Summary of the invention
In view of above-mentioned, the purpose of this invention is to provide a kind of liquid-sighting glass, it can bear higher pressure, has preferably anticorrosion properties and worthwhile economically, and a kind of method of making liquid-sighting glass.
For reaching above purpose, according to one aspect of the present invention, provide a kind of liquid-sighting glass, comprising:
Main body, this main body has cavity and entrance, and the fluid that remains to be inspected flows to described cavity by this entrance;
From the annular extension that described main body is extended and made by stainless steel, described annular extension forms porose, and the cavity that forms in this hole and the described main body is communicated with;
Cylinder or disk-shaped glass part, this glass workpiece are rigidly held in the hole of described annular extension, form airtight and liquid-tight seal between the inner surface of the periphery of described glass workpiece and described annular extension;
Wherein said main body is made by stainless steel.
According to the present invention on the other hand, provide a kind of and engaged the technique of stainless steel part and clear glass spare by sintering, stainless steel part has first surface and partly is used for partly engaging with the second surface of glass workpiece, and this technique comprises following steps:
Stainless steel part is provided;
Transparent glass workpiece is provided;
Stainless steel part and glass workpiece are placed in the graphite support, and described first surface partly is close to described second surface part;
The graphite support that stainless steel part and glass workpiece are arranged on it is placed in the stove;
Sintered stainless steel spare and glass workpiece; And
Stainless steel part and the glass workpiece of cooling sintering.
Adopt liquid-sighting glass of the present invention, each major part comprises main body and ring, is made by the stainless steel more cheap than brass; Secondly, because stainless steel has high intensity than brass, do thinlyyer so the wall thickness of these parts can or stretch by casting, cause less material consumption.Therefore, production cost and overall weight are minimized.
Glass workpiece is in the same place by sinter bonded with ring, and pressure tolerance and the sealing effectiveness of liquid-sighting glass improve greatly.
Secondly, main body and ring are fixed together by laser weld, have realized good sealing between each member that couples together.
Moreover because bearing claw is with thinking that indicator provides supporting, and this bearing claw is not arranged in the fluid flowing passage, thereby the flow fluid does not cause flow resistance and causes Energy Intensity Reduction.Secondly, the production cost of bearing claw is lower than the supporting member with spring and latch bracket.
Adopt sintering process of the present invention, can obtain following each advantage:
1. sintering circuit is carried out under the reducing gas environment, so prevented that stainless steel is oxidized.
2. because high purity graphite is used for making the graphite support with low heat transfer coefficient, energy consumption has reduced; Secondly, cover transparent glass workpiece by adopting, the contact area of glass workpiece and reducing gas has reduced, thereby prevents that at high temperature glass and reducing gas react;
3. slow cooling mode is used for cooling off ring and the glass workpiece of sintering, becomes fragile so can prevent glass workpiece and stainless steel part;
4. do not need additive;
5. sintering process of the present invention can be in order to sintering common stainless steel and simple glass.
Description of drawings
The present invention is described in detail with reference to the accompanying drawings, wherein
Fig. 1 is the longitudinal profile view of traditional liquid-sighting glass;
Fig. 2 is the longitudinal profile view of the liquid-sighting glass of first preferred embodiment of the invention;
Fig. 3 is the perspective view that is shown in the liquid-sighting glass among Fig. 2;
Fig. 4 is the plane of bearing claw;
Fig. 5 is the cross section view of the bearing claw got along Fig. 4 center line A-A;
Fig. 6 is the perspective view of bearing claw;
Fig. 7 A is the longitudinal profile view of the liquid-sighting glass of second preferred embodiment of the invention, and Fig. 7 B is the perspective view of this liquid-sighting glass;
Fig. 8 A is the top view of the liquid-sighting glass of third preferred embodiment of the invention, and Fig. 8 B is the axial section view of getting along Fig. 8 A center line A-A;
Fig. 9 is the axial section view of ring;
Figure 10 is the perspective view of glass workpiece;
Figure 11 A is the plane of graphite base plate, and Figure 11 B is the cross section view of getting along Figure 11 A center line A-A;
Figure 12 is the front view of graphite supporting member;
Figure 13 A is the top view of graphite cover, and Figure 13 B is the cross section view of getting along Figure 13 A center line A-A;
Figure 14 A is the top view that the graphite collet of ring and glass workpiece is housed on it, and Figure 14 B is the cross section view of getting along Figure 14 A center line A-A.
The specific embodiment
The first embodiment
Referring now to Fig. 2, it is the longitudinal profile view of the liquid-sighting glass of first preferred embodiment of the invention.
Shown among Fig. 2, liquid-sighting glass 200 mainly comprises main body 210, ring 220, cylinder or discoid 230, bearing claw 240, indicator 250 and two sockets 260.
On the axial end that is opposite to main body of ring 220, can arrange mark 228 with indicator (being described later) co-operating so that detect various states or the parameter that fluid to be monitored is arranged, shown among Fig. 3.
Cylinder or discoid 230 be by making such as glass such as soda-lime glass, and preferably made by soda-lime glass.
Fig. 4 is the plane of bearing claw; Fig. 5 is the cross section view of the bearing claw got along Fig. 4 center line A-A; And Fig. 6 is the perspective view of bearing claw.
Shown in Fig. 4-6, bearing claw 240 comprises centerbody 241, and centerbody 241 has hole 242 and counterbore 243, forms annular shoulder 244 therebetween.Hole 242 provides the passage of fluid to indicator.Three claws 245, each interval 120 degree extend from centerbody 241.The quantity that should be pointed out that claw is not limited to three, and four or more claw also can.Secondly, clearly, bearing claw can be various shapes for the person skilled in the technical field, as long as it can provide required supporting to indicator 250.
Return Fig. 2 and 3, two sleeve-shapeds projection 266 and 267 and arrange around entrance 217 and outlet 218, and preferably made by the material identical with main body 210 and make one with main casing.Two sockets 260 are made by suitable material, and such as copper or copper facing steel, and by utilizing any suitable method of attachment, such as induction welding, furnace brazing etc. is connected to sleeve-shaped projection 266 and 267 and is secured to main body.Although can adopt multiple welding method for this purpose, preferably adopt induction welding during two sockets of attaching, because the induction welding joint shows superior sealing property.In the use, liquid-sighting glass utilizes two conduits 260 to connect in a suitable manner or is connected in the fluid dispatch tube.
In assembling during liquid-sighting glass 200, cylinder or discoid 230 are fitted in the hole 221 of ring and are fixed in ring by sintering process (being described in detail subsequently), the airtight and liquid-tight seal of realization between cylinder or discoid 230 and ring.
Then, bearing claw 240 is fitted in the annular groove 222, and indicator 250 is arranged between bearing claw 240 and cylinder or discoid 230.The counterbore 243 interior also seats that indicator is contained in bearing claw 240 are placed on the shoulder.Because being subjected to bias voltage, the elasticity of bearing claw 240, indicator 250 forms close contact and thereby in position with cylinder or discoid 230.
Thus, formed the sub-component that comprises ring 220, glass workpiece 230, bearing claw and indicator 250.
Then, ring 220 injects cylinder cavity 216 with its smaller diameter end, until shoulder 226 is till the end face of main body 210.Then, main body 210 and ring 220 along the seam between main body 210 and the ring 220 by being welded and fixed together such as laser weld, plasma weldering etc., so that with respect to fixedly ring 220 and realization sealing therebetween of main body 210, and ring 220 consists of the annular extension of main bodys.Although can adopt multiple welding method to connect ring 220 and main body, preferably adopt laser weld, because can reach good sealing effectiveness by laser weld.
This class liquid-sighting glass can be in order to for example to detect water content or the moisture in the cold-producing medium.When the cold-producing medium contact pointer, if water content or moisture reach a certain predetermined level, indicator will change its color.Operating personnel determine that according to the respective markers on the liquid-sighting glass cold-producing medium is to be in moisture state or drying regime, in order in time change drier.Whether this class liquid-sighting glass also can be in order to according to existing bubble to check whether fluid is filled between cylinder for example or discoid and the flow surface.
The second embodiment
Fig. 7 A is the longitudinal profile view of the liquid-sighting glass of second preferred embodiment of the invention, and Fig. 7 B is the perspective view of this liquid-sighting glass.
Shown in Fig. 7 A and 7B, liquid-sighting glass 300 comprises main body 310, ring 320, cylinder or discoid 330, bearing claw 340 and indicator 350.
Main body 310 is columnar substantially and made by stainless steel, and preferably makes by casting.Main body 310 has through hole 311, and the cylinder cavity 312 that diameter has increased is formed on the center, and cylinder-shaped hole 313 is formed in the wall section of cavity 312.Two axial end portions of main body 310 are shaped with external screw thread.
Ring 320 is sleeve-shaped, makes with through hole 321 and by stainless steel.Ring comprises major diameter part 324 and small diameter portion 325, looping shoulder 326 between the two.Near ring in the face of the ring end of main body, be formed with annular groove 322 at the inner surface of ring, and at the place, outer end that is opposite to inner ring, be formed with counterbore 323, between counterbore 323 and hole 321, form shoulder.
Cylinder or discoid 330 are made by glass, such as soda-lime glass etc., and are preferably made by soda-lime glass.Bearing claw 340 is elastic components, and for indicator 350 provides supporting, the structure of bearing claw 340 is basically with identical in conjunction with the described bearing claw of the first embodiment 240, so omitted its detailed description.
Assembling is during liquid-sighting glass 300, and as described in conjunction with the first embodiment, cylinder or discoid 330 are fitted in the hole 321 of ring and by sintering process is fixed in ring, realizes airtight and liquid-tight seal between cylinder or discoid 330 and ring.Next, bearing claw 340 is fitted within the annular groove 322, and indicator 350 is arranged between bearing claw 340 and cylinder or discoid 330.Because the elasticity of bearing claw 340, indicator 350 are subjected to bias voltage with cylinder or discoid 's 330 formation close contact and thereby be secured in place.
Then, ring 320 is with its smaller diameter end inserting hole 313, until shoulder 326 is till the end face of the wall of limiting hole 313.Then, main body 310 and ring 320 are fixed together by laser weld along the seam between main body 310 and the ring 320, and ring 320 consists of the annular extension of main body.
As the replacement scheme of the second embodiment, an axial end portion or two axial end portions of main body can be designed to other versions.Such as, an axial end portion or two axial end portions of main body can not be shaped with external screw thread, are shaped with internal thread and replace.
The 3rd embodiment
Referring now to Fig. 8 A and 8B, they show the liquid-sighting glass of third preferred embodiment of the invention.Fig. 8 A is top view, and Fig. 8 B is the cross section view of getting along Fig. 8 A center line A-A.
Shown in Fig. 8 A and 8B, the liquid-sighting glass 400 of the 3rd embodiment has substantially columnar main body 410, with through hole 411 and the counterbore 416 that is formed on 411 1 end places, hole, looping shoulder 418 between the two.Main body has the hexagon end head 412 near an end, and an other end of main body is shaped with the external screw thread as shown in Fig. 8 A or is shaped with internal thread.And liquid-sighting glass 400 also comprises cylinder or discoid 430, bearing claw 440, indicator 450, support mesh 460 and each ball float 470.
Main body 310 is made by stainless steel, and preferably makes by casting, although can adopt some other method to be made.Near the end at hexagon end head 412 places, annular groove 413 is formed on the inner surface of main body, in order to put bearing claw 440; And the other end of close main body, another annular groove 415 is formed on the inner surface of main body, in order to put support mesh 460.
Cylinder or discoid 430 are made by glass, such as soda-lime glass etc., and are preferably made by soda-lime glass.
Bearing claw 440 is elastic components, and for indicator 450 provides supporting, its structure is basically with identical in conjunction with the described bearing claw of the first embodiment 240, so omitted its detailed description.
Support mesh 460 is made by suitable material, such as metal, resin etc., but stainless steel preferably, on the one hand in order to allow fluid by and prevent that on the other hand ball float from deviating from liquid-sighting glass.
Ball float is made by suitable material, such as polymethylpentene etc., as long as they can swim among the fluid of to be checked or monitoring, and can be painted vivid to be convenient to observation.
This class liquid-sighting glass can be in order to for example to check whether container has been full of fluid.In use, liquid-sighting glass is arranged to its axis substantially parallel (or sometimes vertical) in ground, if container underfill fluid, then ball float will be because gravity will be positioned at the lower position of cavity, and when container is full of fluid, ball float will be because buoyancy will be positioned at the top of cavity.
In assembling during liquid-sighting glass 400, as described in conjunction with the first and second embodiment, cylinder or discoid 430 are fitted within the through hole 411, and are fixed in main body by sintering process, realize airtight and liquid-tight seal between cylinder or discoid 430 and main body.Then, bearing claw 440 is fitted within the annular groove 413, and indicator 450 is arranged between bearing claw 440 and cylinder or discoid 430.Form close contact because the elasticity of bearing claw 440, indicator 450 are subjected to bias voltage with cylinder or discoid 430 and be secured in place.
Support mesh 460 is fitted in the annular groove 415 after in ball float is put into hole 411, thereby ball float is constrained on by within support mesh 460 and cylinder or discoid 430 space that limits.
On the axial end of the main body that is opposite to threaded portion, can arrange mark 480 with indicator 250 co-operatings so that check various states or the parameter that fluid to be monitored is arranged.
In use, liquid-sighting glass 400 is screwed into the screw that is arranged on the subject matters such as refrigerant pipe, refrigeration system, so that at least a portion of liquid-sighting glass 400 is immersed in the fluid to be monitored.
Comprise that from main body wherein the first and second embodiment of the independent ring that is secured to main body are different, in the 3rd embodiment, main body in order to holding the part of glass workpiece, indicator and bearing claw, with the main body coaxial line make one and the looping extension.
The below describe in detail to be used for engages the sintering circuit of the ring that cylinder or discoid and stainless steel make.
1. the selection of ring and making
Stainless steel is elected to be for the material of making ring.
One section bar or tubing are at first standby makes stock, and then machine-shaping is finished product ring 100, shown among Fig. 9.Processing method includes but not limited to stretching, lathe turning etc.
After this, ring stands to clean, and comprises degreasing, alkali cleaning, drying etc.
2. the selection of glass workpiece and making
Multiple glass can be elected to be for the material of making glass workpiece, includes but not limited to soda-lime glass etc., and preferably soda-lime glass is in order to make glass workpiece.Preferably, the thermal coefficient of expansion in order to the glass of making glass workpiece is at 7-9 (10
-6/ ℃) between.
Glass workpiece is the fritting glass workpiece of a kind of " making with extra care ".This is different from some known operations, wherein utilizes the graphite utensil, and the glass powder part of compression and prebake fuses together with stainless steel parts in stove.
3. ring and glass workpiece are placed in the graphite support
The structure of graphite support at first is described, it comprises graphite base plate, a plurality of glass workpiece supporting member and a plurality of graphite cover.Preferably, high purity graphite because it has high-termal conductivity and low heat capacity, thereby can reduce energy consumption in order to make graphite support.
Figure 11 A is the plane of graphite base plate, and Figure 11 B is the cross section view of getting along Figure 11 A center line A-A.
Shown in Figure 11 A and 11B, negative 102 is formed with a plurality of holding holes or locating hole, is used for holding each supporting member, and each holds or locating hole is the hole with shoulder that comprises hole 721 and counterbore 722, thereby forms annular shoulder 723 between two holes.
Shown among Figure 12, it is the front view of graphite supporting member, and supporting member 103 is that diameter is stepped graphite piece, has small diameter portion 131 and major diameter part 132, and in order to locate ring and to provide supporting for glass workpiece.When equipped supporting member, small diameter portion 131 is inserted into hole 721, until the end face of major diameter part 132 reclines shoulder 723 till, thereby supporting member is positioned among the holding hole.
Shown in Figure 13 A and 13B, they show the structure of graphite cover, and Figure 13 A is the top view of graphite cover, and Figure 13 B is the cross section view of getting along Figure 13 A center line A-A.Graphite cover 104 is the tazza shape, comprises cylinder side wall 911 and diapire 912, and its internal diameter is equal to the external diameter of ring basically, is positioned at inner ring thereby cover glass workpiece.Diapire at graphite cover is shaped with hole 913, allows reducing gas to pass through.
The following describes ring and glass workpiece being equipped with in graphite support.
With reference to Figure 14 A and 14B, wherein Figure 14 A is the top view of graphite support, and Figure 14 B is the cross section view of getting along Figure 14 A center line A-A.
At first, graphite base plate 102 is placed on the platen and each supporting member 103 is contained among each holding hole; Then, each ring 100 is sleeved on above the supporting member; After this, glass workpiece is contained among the hole of ring, and glass workpiece is with respect to the centering location, hole of ring and by supporting members support.Next, mount cover and be connected to ring to cover glass workpiece.By adopting each to cover each glass workpiece, reduced the contact area between glass workpiece and the reducing gas, thereby prevented that glass from high temperature reacting with reducing gas.
The structure that it is pointed out that graphite support is not limited to the above person, can make multiple modification to realize same function.
Such as, in the above-described embodiments, base plate is the part that separates with each supporting member, but they also can make one; Secondly, each lid of separation can substitute with a cover plate, and cover plate is provided with a plurality of circular pit; Or cover plate is provided with a plurality of round annular protrusions, to put each ring and to cover them.
4. sintering ring and glass workpiece
Sintering circuit is explained in connection with some examples, and described example is illustrative and nonrestrictive.
Sintering ring and glass workpiece carry out in stove, such as vacuum drying oven and continuous tunnel furnace etc.
When using vacuum drying oven, graphite support is together with having ring to be sintered and glass workpiece at first to be placed in the stove; Then vacuum drying oven inside is evacuated, so that ring and glass workpiece can carry out sintering under vacuum environment.After this, stove is heated to the first predetermined preheat temperature, and the internal temperature of stove keeps a period of time under this first predetermined preheat temperature, with preheating ring and glass workpiece under this first predetermined preheat temperature; Through after described a period of time, the internal temperature of stove is elevated to the second predetermined preheat temperature, and is keeping a period of time with preheating ring and glass workpiece under this second predetermined preheat temperature under this second predetermined preheat temperature; And after this, the internal temperature of stove is elevated to the 3rd predetermined sintering temperature, and is keeping a period of time with sintering ring and glass workpiece under this 3rd predetermined sintering temperature under this 3rd predetermined sintering temperature, thus the sintering circuit of finishing.The first predetermined preheat temperature and the second predetermined preheat temperature are selected from the temperature range from 500 degree Celsius to 1000 degree Celsius, and the 3rd predetermined sintering temperature is selected from the temperature range from 1000 degree Celsius to 1100 degree Celsius.Can be determined according to many factors in the time period that is used for preheating ring and glass workpiece under each predetermined preheat temperature and time period of under predetermined sintering temperature, being used for sintering ring and glass workpiece, such as the temperature value of certain material, preheat temperature and the sintering temperature of ring and glass workpiece etc.
After sintering circuit finishes, inert gas, such as argon gas, helium etc. is introduced into stove with ring and the glass workpiece of cooling stove and graphite support and sintering.The purpose of inert gas being introduced stove is to accelerate cooling procedure, and not so the cooling stove will be spent the too many time under vacuum condition.When the stove cool to room temperature, graphite support is removed stove together with ring and the glass workpiece of sintering, and stove is ready for next sintering circuit.Can reuse after purification with the inert gas of crossing.
Preferably, graphite support is carried out slow cooling together with ring and the glass workpiece of sintering, becomes fragile in order to prevent glass workpiece and stainless steel part, and can set cool time such as about 40 minutes.Yet, should be pointed out that to be not limited to cool time about 40 minutes but can to change, as long as the quality of sintered products can be guaranteed; Secondly, can become cool time with many factors, such as the certain material of ring and glass workpiece, cooling condition etc.
By this sintering circuit, ring and glass workpiece are sintered and are engaged with each other, and have realized airtight and liquid-tight seal between the composition surface of ring and glass workpiece.
In the above-described embodiments, the internal temperature of stove remains unchanged in a period of time under two kinds of predetermined preheat temperatures and a kind of predetermined sintering temperature, but the invention is not restricted to this.The quantity of the predetermined preheat temperature that the internal temperature of stove remained unchanged in a period of time can be still less or is more; And the quantity of the predetermined sintering temperature that the internal temperature of stove remained unchanged in a period of time can be 2 or more.Moreover each predetermined temperature must not be defined in a certain particular value, and can select within the said temperature scope; Secondly, clearly, each predetermined temperature can become with the quantity of predetermined preheat temperature and the quantity of predetermined sintering temperature, and the internal temperature of stove remains unchanged in a period of time under described predetermined temperature.Secondly, stove also can arrive predetermined final sintering temperature by laser heating, and needn't keep a period of time in the intermediate preheating temperature that is lower than predetermined final sintering temperature.
As noted above, sintering circuit also can adopt continuous tunnel furnace to carry out.When adopting continuous tunnel furnace, the inner space of continuous tunnel furnace or internal cavities preferably are divided into some temperature provinces in the direction of the movement on graphite support edge, and such as three temperature provinces, it is regional that the temperature province of most end is that sintering zone and other zone are preheatings.During sintering process, each temperature province is set as a certain predetermined temperature.Take three regional continuous tunnel furnaces as example, the first and second preheating zones are selected from the temperature range from 700 degree Celsius to 1000 degree Celsius, and the 3rd sintering zone is selected from the temperature range from 1000 degree Celsius to 1100 degree Celsius.Secondly, continuous tunnel furnace is furnished with a cooling section, implements the cooling to sintering ring and glass workpiece.Should be pointed out that cooling section can form one with continuous tunnel furnace, perhaps cooling section can be an independent section, during use and stove combined.
When sintering circuit began, nitrogen was at first introduced the stove under the room temperature, and stove is heated until internal temperature reaches a predetermined temperature simultaneously.
When internal temperature reaches predetermined temperature, stop to introduce nitrogen and replace reducing gas, such as hydrogen or carbon monoxide etc. introduced stove.Adopting in the situation of hydrogen as reducing gas, predetermined temperature can be set in such as 700 degree Celsius, and is adopting in the situation of carbon monoxide as reducing gas, and predetermined temperature can be set in such as 550 degree Celsius.The former reason of introducing reducing gas after reaching predetermined temperature is: reducing gas; such as hydrogen; running into oxygen under the temperature that is being lower than its dew-point temperature (being approximately 700 degree Celsius for pure hydrogen) can blast; so; thereby so that prevent hydrogen explosion protection stove, just until the internal temperature of stove is introduced hydrogen when reaching the first predetermined temperature.
Nitrogen is along with the introducing process of reducing gas is got rid of gradually, and simultaneously, and three temperature provinces are heated separately their predetermined temperature and remain on subsequently under this temperature.When in three temperature provinces each reached its predetermined temperature, each graphite support was placed in the stove in succession together with ring and glass workpiece, was used for carrying out sintering at the reducing gas environment.
During sintering process, the first graphite support remains on the first first temperature province of being scheduled under the preheat temperature together with having ring to be sintered and glass workpiece to be sent to, and in this temperature province, stop a period of time such as 6-7 minute, then be sent to the second temperature province that remains under the second predetermined preheat temperature that is higher than the first predetermined preheat temperature, and the second graphite support is sent to the first temperature province simultaneously.Process is such as after a period of time of 6-7 minute, the first graphite support is sent to the 3rd temperature province that remains under the 3rd predetermined sintering temperature that is higher than the second predetermined preheat temperature, and while the second graphite support is sent to the second temperature province and the 3rd graphite support is sent to the first temperature province, and ring and glass workpiece are sintered such as 6-7 minute at the 3rd temperature province place.In this way, sintering circuit can be carried out continuously, and conveyer belt can be in order to transmit each graphite support by three temperature provinces successively.
Ring and glass workpiece are able to sintering after standing the heating of three region-types and sintering.Then, the cavity that graphite support is sent to cooling section together with ring and the glass workpiece of sintering, gradually cool to room temperature.Preferably, graphite support is carried out slow cooling together with the ring of sintering and glass workpiece and can be set as cool time such as about 40 minutes.But, should be pointed out that to be not limited to about 40 minutes cool time, and can become along with many factors, such as the certain material of ring and glass workpiece, the chilling temperature of cooling section cavity inside etc.Preferably, the cavity of cooling section remaining under the constant temperature such as cooling mediums such as water by the surrounding cavity circulation.
The purpose of reducing gas being introduced stove during sintering circuit is; react to generate water (when reducing gas is hydrogen) or carbon dioxide (when reducing gas is carbon monoxide) with the remnant oxygen in the furnace chamber, in order to prevent oxidized and thereby the protection sintering circuit of stainless steel.During sintering circuit, consume the reducing gas of some, thus continuous tunnel furnace reducing gas continuous supplementation, and unnecessary reducing gas is by lighting it and burning at the entrance and exit place of furnace chamber.
By sintering circuit, glass workpiece and ring are joined together, and have realized airtight and liquid-tight seal between the composition surface of ring and glass workpiece.
In above embodiment, illustrated continuous tunnel furnace comprises three temperature provinces: two preheating zones and a sintering zone.But, the invention is not restricted to this.The quantity in preheating zone is not limited to two, and more or less preheating zone also is fine; And the quantity in sintering zone is not limited to one, and two or more sintering zone also is fine.Secondly, in above embodiment, illustrated sintering circuit continues about 20 minutes, but, for the person skilled in the technical field clearly, the time period that is used for sintering circuit will become along with many factors, such as the temperature value of certain material, preheat temperature and the sintering temperature of ring and glass workpiece etc.
Moreover each member also can give sintering in having the continuous tunnel furnace of a temperature province just.In the case, graphite support is together with having ring to be sintered and glass workpiece, after reducing gas is introduced, is being placed under the predetermined temperature among the stove.
Secondly, the temperature of setting for each temperature province is not limited to a certain particular value but can changes, and depends on various operating conditions and the certain material of each member to be sintered is arranged.Secondly, the temperature of setting for each temperature province can become with the quantity in preheating zone and/or sintering zone.
Although the present invention is explained in conjunction with some embodiment, the person skilled in the technical field will be understood that each embodiment is just illustrative rather than restrictive, multiple modification can be arranged and does not depart from spirit of the present invention and category.
Such as, in above each embodiment, liquid-sighting glass is furnished with indicator and bearing claw.But, when liquid-sighting glass just when observing flow surface, indicator and bearing claw can omit.Equally, each ball float also can be removed from the 3rd embodiment, and in addition, each ball float also can be used in conjunction with the liquid-sighting glass of the first and second embodiment.
In above each embodiment, sintering circuit is illustrated in conjunction with being used in stainless steel ring among the liquid-sighting glass and cylinder or discoid.But, the invention is not restricted to this.Any stainless steel part and glass workpiece that sintering circuit of the present invention can need to be bonded together in order to sintering, and stainless steel part and glass workpiece can be any shape.
Claims (15)
1. liquid-sighting glass comprises:
Main body, this main body has cavity and entrance, and the fluid that remains to be inspected flows to described cavity by this entrance;
From the extended annular extension of described main body, described annular extension forms porose, and the cavity that forms in this hole and the described main body is communicated with;
Cylinder or disk-shaped glass part, this glass workpiece are rigidly held in the hole of described annular extension, form airtight and liquid-tight seal between the inner surface of the periphery of described glass workpiece and described annular extension;
Wherein said main body and annular extension are made by stainless steel;
It is characterized in that, described liquid-sighting glass also comprises indicator and is used for the supporting member that the supporting indicator makes it to rely on described glass workpiece, described supporting member is bearing claw, described bearing claw has centerbody and from the extended a plurality of pawls of centerbody, inner surface in described annular extension is formed with annular groove, and described bearing claw remains in the described hole of described annular extension by each pawl that is housed in the described annular groove; The centerbody of described bearing claw has hole and diameter greater than the counterbore in this hole, forms annular shoulder therebetween, and described indicator is arranged between described shoulder and the described glass workpiece, and the described hole of described centerbody provides the passage of fluid to indicator.
2. according to liquid-sighting glass claimed in claim 1, it is characterized in that described glass workpiece is engaged in described annular extension by sintering process.
3. according to liquid-sighting glass claimed in claim 1, it is characterized in that described glass workpiece is soda-lime glass.
4. according to liquid-sighting glass claimed in claim 1, it is characterized in that described annular extension is formed by ring, described ring has through hole and is secured to described main body.
5. according to liquid-sighting glass claimed in claim 4, it is characterized in that described ring and main body couple together by laser weld.
6. according to liquid-sighting glass claimed in claim 1, it is characterized in that, described main body is cup-shaped, be made via stretching, described main body also has outlet, described entrance and exit is formed on the sidewall of described main body, and described liquid-sighting glass also comprises two pipes, and described two pipes are secured to described main body at described entrance and exit place.
7. according to liquid-sighting glass claimed in claim 6, it is characterized in that described two pipes are made of copper, and are secured to described main body by induction welding.
8. according to liquid-sighting glass claimed in claim 1, it is characterized in that described main body has from extended two axial end portions of described main body, and in two axial end portions each is formed with external screw thread or internal thread, described main body is made by casting.
9. according to liquid-sighting glass claimed in claim 1, it is characterized in that described main body is cylindrical, described annular extension is integral by casting and described main body coaxial line landform.
10. according to liquid-sighting glass claimed in claim 9, it is characterized in that hexagon end head forms around described annular extension, and an end relative with annular extension of described main body is formed with external screw thread or internal thread.
11. according to liquid-sighting glass claimed in claim 9, it is characterized in that, also comprise ball float and support mesh, described support mesh allow fluid by and prevent that described ball float from deviating from liquid-sighting glass;
Inner surface at described cylindrical-shaped main body is formed with annular groove, and described support mesh is installed in by its periphery and is maintained in the described annular groove in the described main body, and the space that is formed for holding described ball float between described support mesh and described glass workpiece.
12., it is characterized in that described support mesh is made by stainless steel according to the described liquid-sighting glass of claim 11, and described ball float is made by polymethylpentene.
13., it is characterized in that the outer face of described annular extension is provided with mark according to liquid-sighting glass claimed in claim 1.
14., it is characterized in that described ring is made by stretching or turning according to liquid-sighting glass claimed in claim 4.
15. a refrigeration system comprises the liquid-sighting glass of aforementioned every claim described in any one.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2008/071714 WO2010009590A1 (en) | 2008-07-22 | 2008-07-22 | Sight glass assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102099641A CN102099641A (en) | 2011-06-15 |
| CN102099641B true CN102099641B (en) | 2013-04-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200880130437.XA Expired - Fee Related CN102099641B (en) | 2008-07-22 | 2008-07-22 | Sight glass assembly |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102099641B (en) |
| WO (1) | WO2010009590A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102236143B (en) * | 2010-04-29 | 2015-11-25 | 浙江三花制冷集团有限公司 | Liquid-sighting glass |
| CN105044871A (en) * | 2013-07-16 | 2015-11-11 | 浙江创立汽车空调有限公司 | Visual liquid lens assembly method |
| CN103900304A (en) * | 2014-01-16 | 2014-07-02 | 芜湖三瑞香雪制冷科技有限公司 | Liquid storage device for refrigerating system |
| CN105156767B (en) * | 2015-08-20 | 2018-08-14 | 温州金合特种材料制造有限公司 | A kind of Langaloy duct element and preparation method thereof with visor |
| CN109073307A (en) * | 2016-08-04 | 2018-12-21 | 株式会社电装 | Refrigerating circulatory device |
| US11686687B2 (en) * | 2020-01-22 | 2023-06-27 | ESCO Products, Inc | Oil sight glass |
| FR3126495A1 (en) * | 2021-09-01 | 2023-03-03 | L'Air Liquide Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude | POWDER STORAGE DEVICE COMPRISING AN ENCLOSURE AND ASSOCIATED METHOD |
| GB2620475A (en) * | 2023-04-27 | 2024-01-10 | Innovative Heating Solutions Ltd | Fluid inspection apparatus |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2358654A1 (en) * | 1973-11-24 | 1975-05-28 | Hansa Metallwerke Ag | Indicator for liquid refrigerant - has glass ball beneath sight glass, and indicators for moisture and acid content |
| DE3044094A1 (en) * | 1980-11-24 | 1982-06-16 | Hansa Metallwerke Ag, 7000 Stuttgart | Refrigeration pipe sight glass intermediate piece - comprises joint with bead and annular portion supporting indicator |
| US5210658A (en) * | 1992-02-18 | 1993-05-11 | Pressure Products Company, Inc. | Sight glass assembly |
| CN1072910A (en) * | 1991-12-05 | 1993-06-09 | 常州市潞城鹤翔五金机械厂 | Sintering process of metal glass observation mirror |
| US5383338A (en) * | 1993-12-17 | 1995-01-24 | Emerson Electric Co. | In-line sight indicator |
-
2008
- 2008-07-22 CN CN200880130437.XA patent/CN102099641B/en not_active Expired - Fee Related
- 2008-07-22 WO PCT/CN2008/071714 patent/WO2010009590A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2358654A1 (en) * | 1973-11-24 | 1975-05-28 | Hansa Metallwerke Ag | Indicator for liquid refrigerant - has glass ball beneath sight glass, and indicators for moisture and acid content |
| DE3044094A1 (en) * | 1980-11-24 | 1982-06-16 | Hansa Metallwerke Ag, 7000 Stuttgart | Refrigeration pipe sight glass intermediate piece - comprises joint with bead and annular portion supporting indicator |
| CN1072910A (en) * | 1991-12-05 | 1993-06-09 | 常州市潞城鹤翔五金机械厂 | Sintering process of metal glass observation mirror |
| US5210658A (en) * | 1992-02-18 | 1993-05-11 | Pressure Products Company, Inc. | Sight glass assembly |
| US5383338A (en) * | 1993-12-17 | 1995-01-24 | Emerson Electric Co. | In-line sight indicator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102099641A (en) | 2011-06-15 |
| WO2010009590A1 (en) | 2010-01-28 |
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