CN2072179U - Controller for fluid pressure - Google Patents
Controller for fluid pressure Download PDFInfo
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- CN2072179U CN2072179U CN 90212093 CN90212093U CN2072179U CN 2072179 U CN2072179 U CN 2072179U CN 90212093 CN90212093 CN 90212093 CN 90212093 U CN90212093 U CN 90212093U CN 2072179 U CN2072179 U CN 2072179U
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- fluid pressure
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Abstract
The utility model belongs to a controller for fluid pressure with an electric contact point. Due to the fact that a reed rack which has simple structure, compactness, large electric contact capacity, fast action, and reasonable placing position, and a differential thread adjusting mechanism which can be slightly adjusted are arranged by the utility model, the utility model has the advantages of small size, simple structure, high precision and little error, what is more, the controller for fluid pressure with an electric contact point has high reliability, good repetitiveness and small switching difference. The controller for fluid pressure with an electric contact point can be used for the self-control system of the pressure of industrial fluid, and can adapt the requirements of the occasions of low pressure, medium pressure, high pressure or negative pressure.
Description
The utility model relates to the quantitative control of hydrodynamic pressure, belongs to the fluid pressure controller with electric contact.
In the existing fluid pressure controller with electric contact, a kind of bellow type that is is arranged, for example the YWK-50 type pressure controller produced at present of China.It has a big box body, and the tabular bearing of band center hole is equipped with in the outside of a side plate with holes of box body, and this bearing and bellows, platen and bring the cover body formation pressurized chamber of pore into.When pressurized chamber pressurized and pressure rise to certain value, platen in the cover body will compress bellows, and make in the bellows, one end and platen welding, and the other end passes the drive link in bearing center hole and side plate hole, further puts in box body, and the two-stage lever construction that touches in the box body carries out transmission and amplification, and overcome the active force of the accent power spring on the lever, make the tinsel that has electric contact in the box body realize closed or disconnect.Another kind is a diaphragm type, for example the present D500/7D type pressure controller of producing of China.It also has a big box body, and the diaphragm bearing of honeycomb duct, diaphragm and band center hole is equipped with in the outside of the side plate with holes of box body.Have leverage, single-pole double-throw switch (SPDT) and two cover accent power springs, spring seat and adjusting screw rod etc. in its box body.Two adjusting screw rods stretch out box body respectively, and are connected with differential gap adjusting terminal with the set point adjustment terminal of outside.After hydrodynamic pressure made the diaphragm compressive deformation, diaphragm was controlled single-pole double-throw switch (SPDT) by drive link and leverage, realized the break-make of electric contact.The deficiency of these two kinds of fluid pressure controllers is: volume is big, complex structure, and simultaneously, because other part is many, electric contact action conversion links cumulative errors many, that cause in each gap are big, thereby reliability of products is low, and precision is low, differential gap is big.
It is little, simple in structure that task of the present utility model provides a kind of volume, reliability height, precision height, and the little fluid pressure controller with electric contact of differential gap.
The technological scheme that realizes above-mentioned task is: to big box body and the electric contact action switching mechanism that part is many in addition of inner complex structure thereof that is connected with bearing, with one simple small and exquisite, can directly change, the electric contact output capacity is big and the reed frame that is swift in motion substitutes, and the position is set from outside by the cavity that bearing, platen and bellows or diaphragm constituted, change the inside that is set to this cavity into, and the differential thread adjustment structure that can finely tune is set on bearing.Specifically, just to having electric contact and connecting lead, and have bellows or diaphragm and bellows or diaphragm not only with platen but also the pressure controller that is connected with the bearing of band center hole, in by the cavity that platen and bearing and bellows or diaphragm constituted, a reed frame is set, this reed frame by preceding guide rod, two or more have electric contact reed, be enclosed within the locating cover of reed outside and with the locating cover radial fit and fused by the back-guiding rod of locating cover axial limiting.Tube is regulated in the coarse adjustment that is being threaded on the bearing, and application differential thread principle, tube is regulated in the different fine setting of pitch of an internal and external threads of being threaded in the inner bolt hole of tube is regulated in coarse adjustment, the preceding guide rod of the reed frame that is being threaded again in the inner bolt hole of tube is regulated in fine setting.This pressure controller can have housing, so that form the pressurized chamber.Also can not be with housing, and utilize outside thread or flange edge on the bearing, directly be contained on pressurized container or the equipment, and platen one end is stretched into pressure chamber.
The lead that is connected with electric contact is drawn in the center hole of guide rod in the past.But in order to dwindle leading shank diameter and easy to process, preferably lead is drawn from the wire guide of coarse adjustment adjusting tube, and after doing like this, can realize rotating synchronously with the reed frame in order to make coarse adjustment regulate tube, both having avoided drawing lead is damaged, can use in indivedual frequent occasions of adjusting again, coarse adjustment is regulated have on the tube with the reed frame on the groove or the hole of protuberance corresponding matching, coarse adjustment is regulated have on the tube with the reed frame on groove or the protuberance of hole corresponding matching.
Make back-guiding rod not only with the locating cover radial fit but also be subjected to the purpose of locating cover axial limiting, be to make back-guiding rod and preceding guide rod have good coaxality, to guarantee the operation precision of reed frame, and make back-guiding rod when axial displacement reaches certain displacement trace, be subjected to the axial limiting of locating cover, under the superpressure situation, be not damaged to guarantee the reed frame.Concrete scheme also has varied.Can make back-guiding rod have circular groove, and locating cover have with the reducing of circular groove radial fit or interior convex body and form spacing to the bi-directional axial of back-guiding rod.Also can make back-guiding rod have the shaft shoulder or have the location convex body, be subjected to the location end face of locating cover axial limiting with formation, and locating cover has reducing or have porose location end cap, and is so that both divided radial fit with the thin rod part of back-guiding rod, spacing to the location end face axial of back-guiding rod again.Preferably directly make back-guiding rod have and be subjected to the location end cap of locating cover axial limiting with the locating cover radial fit, be that back-guiding rod can be with the location end cap, make by the one material monolithic, also can be by core bar and location end cap welding or bonding forming, and the location end cap can with the inwall or the outer wall radial fit of locating cover, in axial displacement, be subjected to the axial limiting of locating cover again.
In order to make the locating cover can be axially bidirectionally limited to back-guiding rod, back-guiding rod is threaded with locating cover cooperates, and the axial fit clearance of screw thread, also be the axial displacement trace of back-guiding rod.
In order to make platen produce pressure to back-guiding rod, can produce pulling force to back-guiding rod again, back-guiding rod is threaded with platen.
As long as the conversion reed structure just can be applicable to the control of malleation or negative pressure, back-guiding rod both was threaded in order to make pressure controller with locating cover, is threaded with platen again.
For the bellow type pressure controller, in order to make it can not only be applied to low pressure, also can be applied to medium-pressure or high pressure, can be in the cavity that constitutes by bearing, bellows and platen thereof, regulate between tube and the platen to be provided with pressure spring between coarse adjustment, so that make the elastic force that not only will overcome bellows behind the platen pressurized, also to overcome the elastic force of pressure spring, could axial displacement and the reed frame produced pressure, like this, pressure set points is improved.
The reed frame that the utility model is big with volume in the prior art, complex structure and part is many in addition electric contact action switching mechanism are improved to small and exquisite, good reliability simple in structure, can directly change, be swift in motion, the position is set simultaneously becomes inside from the outside by the inner chamber that bearing, platen and bellows or diaphragm constituted again, occupy-place is reasonable.Not only volume dwindles greatly, and structure is greatly simplified, and part reduces in addition, and the electric contact output capacity is big, and is same as the prior art.Main is, after platen produces axial force to the reed frame, the axial displacement of platen is only just once directly changed the radial displacement that is enlarged into electric contact through the reed frame, both conversion links was few, magnification factor is big again, the electric contact displacement amount reaches 100～150 times of platen displacement amount, electric contact energy rapid closing or disconnection, only 10～20 milliseconds of actuation times.The regulating mechanism of adding setting has adopted differential thread to adjust structure, finely tunes highly sensitive.Therefore, compared with prior art, improved reliability of products and precision greatly, and good reproducibility, the setting value error is little, and differential gap is little.
Below in conjunction with accompanying drawing the utility model is described in further detail.
Fig. 1 is a kind of bellow type pressure controller structural drawing housing, that be applicable to middle pressure that has.
Fig. 2 is the sectional view that tube is regulated in coarse adjustment among Fig. 1.
Fig. 3 is the A-A sectional view of Fig. 2.
Fig. 4 is that the A of Fig. 2 is to view.
Fig. 5 is the coarse adjustment adjusting tube shown in Figure 3 and the erection drawing of reed frame.
Fig. 6 is coarse adjustment adjusting tube another synchronous rotational structure erection drawing with the reed frame.
Fig. 7 is the B-B sectional view of Fig. 6.
Fig. 8 is another manufacturing of back-guiding rod and the structural drawing of assembly technology.
Fig. 9 is another manufacturing of platen and the structural drawing and the erection drawing of assembly technology.
Figure 10 is a kind of structural drawing with bonding each the reed two ends of sealing compound.
Figure 11～14 are respectively four kinds of basic reed structure schematic diagrams of the present utility model.
Figure 15 is a kind of structural drawing that is applicable to the bellow type pressure controller of high pressure.
Figure 16 is a kind of structural drawing that is applicable to the diaphragm type pressure controller of minute-pressure.
Figure 17 is another three-position type reed structure figure.
The bellow type pressure controller of pressing in a kind of being applicable to shown in Figure 1, an end of its bellows (2) is connected with platen (1), and the other end is connected with the bearing (3) of being with center hole, and Placement is to weld, and also can be bonding or other is tightly connected.In the cavity that is constituted by platen (1), bellows (2) and bearing (3), be provided with a reed frame, this reed frame is had reed (11), locating cover (12) and the back-guiding rods (13) of electric contact (10) by welding or bonding fusing by preceding guide rod (9), two.Locating cover (12) is enclosed within reed (11) outside, and it adds that by a tubular body top that can be connected with preceding guide rod (9) constitutes, and also can be other hood configuration.Back-guiding rod (13) has with the cover mouth end radial fit of locating cover (12) and is subjected to the location end cap (21) (referring to Fig. 1,8) of locating cover (12) axial limiting.Tube (4) is regulated in the coarse adjustment that is being threaded on the bearing (3), coarse adjustment is regulated in the inner bolt hole of tube (4), tube (6) is regulated in the different fine setting of inside and outside pitch that is being threaded, and fine setting is regulated in the inner bolt hole of tube (6), the preceding guide rod (9) of the reed frame that is being threaded.Isolation layer or insulating trip (also can all be stained with isolation layer in two ends of each reed (11), for example shown in Figure 10 carry out bonding with High-Voltage Insulation glue (24)) are arranged between electric contact (10) and the reed (11).The wire guide (8) that the lead (7) that is connected with electric contact (10) is regulated tube (4) through coarse adjustment is drawn.(also can use the preceding guide rod (9) of hollow tubular, and lead (7) is passed in the center hole of preceding guide rod (9)).Coarse adjustment is regulated tube (4) and is gone up and can add locking nut (5) and carry out tightening, or opens radial hole and establish Cock screw on bearing (3), or adopt add panel, other method tightening such as bonding after adjusting.Bearing (3) is contained in to have on single channel or twin-channel, as the to add zero shape circle housing (15), so that form the pressurized chamber and communicate with the pipeline of pressure fluid.In the cavity that is constituted by platen (1), bellows (2) and bearing (3), between coarse adjustment adjusting tube (4) and platen (1), also be provided with a pressure spring, this pressure spring adopts cylindrical helical spring (14).Behind platen (1) pressurized, must overcome the elastic force of bellows (2) and cylindrical helical spring (14) simultaneously, could and then back-guiding rod (13) be produced pressure, thereby the pressure set points of this pressure controller is improved, pressure pressure is controlled in adapting to.
Bellow type pressure controller shown in Figure 1, its working principle is: when pressure fluid advances, after going into the pressurized chamber in the housing (15), because bellows (2) is tightly connected with platen (1) and bearing (3) and has formed a semi-enclosed cavity, thereby platen (1) is under the pressure effect of fluid, compress bellows (2) and cylindrical helical spring (14), overcome their elastic force and axial displacement takes place, when the pressure in pressurized chamber arrives setting value, the inner chamber side operative end surface of platen (1) is oppressed the abutting end operative end surface of back-guiding rod (13) immediately, make back-guiding rod (13) to the axis of orientation of locating cover (12) to microdisplacement, stop displacement until the axial limiting that is subjected to locating cover (12).In the displacement trace is become 0 process by δ, two reeds (11) are subjected to the axial pressure of back-guiding rod (13) and more become crooked, amount of deflection increases, make two electric contacts (10) radial displacement and closed mutually, lead (7) conducting, thereby send the electrical signal of quantitative control, and then go to control relevant devices and normally move.When the hydrodynamic pressure in pressurized chamber drops to less than set point pressure, platen (1) is no longer oppressed back-guiding rod (13), thereby reed (11) release of pressure, amount of deflection diminishes until resetting, make two electric contacts (10) radial displacement and disengaging mutually, lead (7) disconnects, and pressure controller recovers the normally open of electric contact (10).
Obviously, after the pressure controller of structure shown in Figure 1 sheds pressure spring, the counter-force that then only need overcome bellows (2) behind platen (1) pressurized just can so that compressing back-guiding rod (13), thereby pressure set points just reduces, and just can adapt to low pressure and control.
Pressure controller shown in Figure 1, the adjustment of its pressure set points is regulated tube (4) by coarse adjustment and is finished jointly with fine setting adjusting tube (6).Tube (4) the both spring force of can regulate pressure spring, the axial position of can regulate reed frame are again regulated in the rotation coarse adjustment.Rotary fine adjustment is regulated the axial position that tube (6) then can only be regulated the reed frame.Owing to the internal and external threads difference that tube (6) is regulated in fine setting, therefore, fine setting adjusting tube (6) whenever revolves and turns around, and preceding guide rod (9) only rises or descends the poor of an inside and outside pitch.This differential thread is adjusted structure, is that pressure set points of the present utility model can realize the main cause that trace is regulated.
Fig. 2～4 are the structural drawing that tube (4) is regulated in coarse adjustment among Fig. 1, and it has two axial wire guides (8), and the corresponding position of reed frame has side keyway (16) relatively.
Fig. 5 is the erection drawing that tube (4) and reed frame are regulated in coarse adjustment shown in Figure 3.Reed (11) constitute the end key (17) of reed frame with preceding guide rod (9) connecting end end, and this connecting end of locating cover (12) and reed (11) is welded into bonding.
Fig. 6,7 is coarse adjustment adjusting tube another synchronous rotational structure figure with the reed frame, locating cover (12) have polygonal (for example quadrilateral) protuberance (18) with preceding guide rod (9) connecting end, the corresponding position that tube (4) is regulated in coarse adjustment has polygonal (for example quadrilateral) shrinkage pool (19).
For two kinds of structures shown in Fig. 5,6, also can be in contrast, for example locating cover (12) have side keyway with preceding guide rod (9) connecting end, and coarse adjustment is regulated the corresponding position of tube (4) and is had the end key.Perhaps locating cover (12) have the polygonal shrinkage pool with preceding guide rod (9) connecting end, and coarse adjustment is regulated the corresponding position of tube (4) and is had corresponding polygonal protuberance.
Fig. 8 is another structural drawing of back-guiding rod (13).It is not the single part in addition that has the location end cap and made by the one material monolithic with the location end cap as shown in Figure 1, but is threaded and welding or bonding forming by core bar (20) and location end cap (21).This structure, both be convenient to locating cover (12) axial limiting, be convenient to debugging again, thereby make back-guiding rod (13) have one suitable, can be to the displacement trace δ of locating cover (12) direction axial displacement, can guarantee that back-guiding rod (13) has enough displacement trace δ, so that make reed (11) produce resiliently deformable, can guarantee that again back-guiding rod (13) not because of the excessive reed (11) that makes of displacement trace δ produces plastic deformation, causes damage (being that the fluid over-pressuring fluctuation causes damage).
The manufacturing of reed frame can adopt welding or method such as bonding to be processed into one.For example with the two ends of reed (11) respectively with preceding guide rod (9), back-guiding rod (13) crimping and welding are again with locating cover (12) suit and be welded on reed (11), or on the preceding guide rod (9).Also can be to preceding guide rod (9), reed (11), and back-guiding rod (13) (or core bar (20) of back-guiding rod (13)), be processed into one part in addition with a metallic rod material, go up the electric contact (10) of dress tape insulation sheet and is connected lead (7) at reed (11) again, socket locating cover (12) also welds or bonding being integral again.
Fig. 9 is another structural drawing of platen (1).This platen (1) is not the single in addition part of being made by the one material as shown in Figure 1, but the central screw (22) that is taken up pilot trench by an end is threaded and welding or bonding forming with annular disk (23).Do like this and can help coarse adjustment adjusting tube (4) and fine setting adjusting tin (6) that the adjustable extent of pressure set points is adjusted.In addition, various contact matching or the Spielpassung between platen (1) and the back-guiding rod (13).For example plane type contact matching or shaft hole mode end face cooperate, and also can change the cooperation that is threaded into.Do like this and can make platen (1) not only can apply axial pressure but also can apply axial tension back-guiding rod (13).
As shown in Figure 9, when the back-guiding rod (13) that is threaded with platen (1) also simultaneously with locating cover (12) when being threaded, because screw-thread fit exists axial clearance, make and also just exist axial displacement trace δ between back-guiding rod (13) and the locating cover (12), thereby back-guiding rod (13) all is subjected to the axial limiting of locating cover (12) in axial compression direction or axial tension direction, and it is spacing also promptly to be subjected to bi-directional axial.At this moment, as long as suitable reed structure (facing the introduction of Figure 11～14 as follows) and the combination thereof of apolegamy; Just can make pressure controller be applicable to malleation or negative pressure control.
Figure 11～14 are four kinds of basic reed structure figure of the present utility model, are summarized as follows:
(1) pressure open type (seeing Figure 11).Its two electric contacts disconnect in the normal state, electric contact closure behind the reed pressurized.
(2) pressure normal close type (seeing Figure 12).Its two electric contacts are closed at common state, and electric contact disconnects behind the reed pressurized.
(3) tension force open type (seeing Figure 13).Its two electric contacts disconnect electric contact closure after the reed tension at common state.
(4) tension force normal close type (seeing Figure 14).Its two electric contacts are closed at common state, and electric contact disconnects after the reed tension.
When above-mentioned four kinds of reed structures are applied on the reed frame, the positive arcuation of one-tenth that reed (11) has with respect to the shaft axis of reed frame, the anti-arcuation of the one-tenth that has, thereby, when reed frame two ends are subjected to axial pressure or pulling force, the amount of deflection of reed (11) will become big or diminish, and makes electric contact (10) that radial displacement and closed or disconnect take place, and forms the connection of lead (7) or opens circuit.
Be subjected to the difference of force direction according to the reed frame of pressure controller, again above-mentioned four kinds of basic structures of reed are carried out choose reasonable and combination utilization, can obtain multiple electric contact control wiring, also can be according to the difference of use occasion, adopt the normally closed of a formula or often open electrical signal control, perhaps adopt the normally closed combined electrical signal of often opening of two formulas or three-position type to control.
By above-mentioned introduction as can be known, bellow type pressure controller shown in Figure 1, as long as repacking a little, just can be by being applicable to malleation, be applicable to negative pressure and become, method of modifying is: 1. shed pressure spring, 2. the reed structure to the reed frame is transformed to tension type (referring to Figure 13) by pressure type, 3. back-guiding rod (13) is cooperated by the shaft hole mode end face with the Placement of platen (1) and become the cooperation (referring to Fig. 9) that is threaded, 4. the back-guiding rod (13) and the fit system of locating cover (12) are changed into to be threaded and cooperate (referring to Fig. 9), perhaps change into back-guiding rod (13) and have the location convex body, and the cover mouth end of locating cover (12) has reducing or have location with holes end cap, and the location convex body is positioned at reed one side of reducing or location with holes end cap.
Figure 15 shows that a kind of bellow type pressure controller that is applicable to high pressure, its structure is same as shown in Figure 1.Different mainly be that the pressure spring that is provided with between bearing (3) and platen (1) has adopted butterfly spring (24), available one, also available two.This structure is applicable to high voltage control.In addition, the structural type of reed (11) is also different, is three-position type, has 6 reeds (11) that have electric contact (10).
Figure 16 is a kind of diaphragm type pressure controller that is applicable to minute-pressure, its structure also with Fig. 1 and shown in Figure 14 identical, different mainly be to have substituted bellows (2) with diaphragm (26), simultaneously, back-guiding rod (13) both directly was threaded with platen (1), again by with core bar (20) location one or that link to each other end cap (21), be threaded with the cover mouth end of locating cover (12).The axial screw thread matching gap of back-guiding rod (13) and locating cover (12), the trace of the displacement of back-guiding rod (13) just δ.In addition, the axial dimension of bearing (3) is elongated, the reed frame is inclusive in the center hole of bearing (3) basically, the diameter of the visual diaphragm in bottom (26) of bearing (3) and be provided with an enlarging, enlarging place is welded with the circle edge of diaphragm (26) or is bonding, the center of diaphragm (26) and platen (1) welding or bonding.
Diaphragm type pressure controller shown in Figure 16, its working principle is: behind diaphragm (26) pressurized, recessed in the center hole of bearing (3) along central axis, and and then back-guiding rod (13) produced axial pressure, make reed (11) amount of deflection become big, when pressure arrives setting value, electric contact (10) closure, lead (7) conducting, thus realized minute-pressure control.When reed structure was transformed into structure shown in Figure 12, electric contact (10) just became normal close type by open type.
When structure shown in Figure 16 will be used for negative pressure when control, select for use as long as the pressure-type reed structure changed Figure 13 for example or tension-type reed structure shown in Figure 14 just can, and select for use Figure 13 structure then to be open type, select for use Figure 14 structure then to be normal close type.After diaphragm (26) is subjected to negative pressure, outwards protrude and drive back-guiding rod (13) and make axial microdisplacement, make electric contact (10) do radial displacement and realize closed or disconnection.
Figure 17 is another three-position type reed structure.After reed structure shown in Figure 17 is adopted in the reed frame conversion of the diaphragm type pressure controller that is applicable to minute-pressure shown in Figure 16, just become to being applicable to the pressure controller of negative pressure.Be numbered respectively 1., 2., 3., 4., 5., 6. with from left to right 6 electric contacts (10), then after diaphragm (26) is subjected to negative pressure and the reed frame is produced axial tension, electric contact 1. with 2., 5. with 6. become disconnection by closure, and then 3. with 4. electric contact then becomes closure by disconnection.
The utility model is when implementing, also can add terminal box and lid as required on bearing (3) or its housing (15), even like this, whole volume also only is 1/3～1/4 of existing pressure controller, and electric contact output capacity energy is same as the prior art, can reach 220V * 5A.
The utility model can be widely used in the hydrodynamic pressure robot control system(RCS) of industrial systems such as oil, water power, heavy machinery, chemical industry.For example be used for boiler, hydraulic equipment, compressor, water work, dilute oil lubrication station or the like.And can produce the product of various different sizes and model, to adapt to the needs of minute-pressure low pressure, middle pressure, high pressure and negative pressure robot control system(RCS) respectively according to different pressures scope, not requirement such as isotype control and normally closed Chang Kai.
Attached: the utility model pressure controller (0～0.5MPa) with YWK-50 type pressure controller (0～0.5MPa) technical order.
Claims (10)
1, a kind of fluid pressure controller has electric contact (10) and connects lead (7), also has bellows (2) or diaphragm (26), and bellows (2) or diaphragm (26) not only be connected with platen (1) but also with the bearing (3) of band center hole, it is characterized in that:
In a, the cavity by platen (1) and bearing (3) and bellows (2) or diaphragm (26) formation, be provided with a reed frame, this reed frame by preceding guide rod (9), have electric contact (10) reed (11), be enclosed within the locating cover (12) of reed (11) outside and with locating cover (12) radial fit and fused by the back-guiding rod (13) of locating cover (12) axial limiting;
Tube (4) is regulated in the coarse adjustment that is being threaded on b, the bearing (3), coarse adjustment is regulated the different fine setting of pitch of the internal and external screw thread that is being threaded in the inner bolt hole of tube (4) and is regulated tube (6), the preceding guide rod (9) of the reed frame that is being threaded in the inner bolt hole of fine adjustment tube (6).
2, fluid pressure controller according to claim 1 is characterized in that: coarse adjustment regulate have on the tube (4) with the reed frame on groove or the protuberance of hole corresponding matching.
3, fluid pressure controller according to claim 2 is characterized in that: reed (11) and preceding guide rod (9) connecting end end constitute the end key (17) of reed frame, and the corresponding position of coarse adjustment adjusting tube (4) has side keyway (16).
4, fluid pressure controller according to claim 2 is characterized in that: locating cover (12) have polygonal protuberance (18) with preceding guide rod (9) connecting end, the corresponding position that tube (4) is regulated in coarse adjustment has polygonal shrinkage pool (19).
5, according to claim 1 or 2 or 3 or 4 described fluid pressure controllers, it is characterized in that: back-guiding rod (13) is threaded and welding or bonding forming by core bar (20) and location end cap (21).
6, fluid pressure controller according to claim 5 is characterized in that: back-guiding rod (13) is threaded with locating cover (12).
7, fluid pressure controller according to claim 6 is characterized in that: back-guiding rod (13) is threaded with platen (1).
8, according to claim 1 or 2 or 3 or 4 described fluid pressure controllers, it is characterized in that: in the cavity by bearing (3), bellows (2) and platen (1) formation thereof, between coarse adjustment adjusting tube (4) and platen (1), pressure spring is housed also.
9, fluid pressure controller according to claim 8 is characterized in that: pressure spring is cylindrical helical spring (14).
10, fluid pressure controller according to claim 8 is characterized in that: pressure spring is butterfly spring (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90212093 CN2072179U (en) | 1990-04-05 | 1990-04-05 | Controller for fluid pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90212093 CN2072179U (en) | 1990-04-05 | 1990-04-05 | Controller for fluid pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2072179U true CN2072179U (en) | 1991-02-27 |
Family
ID=4891701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90212093 Withdrawn CN2072179U (en) | 1990-04-05 | 1990-04-05 | Controller for fluid pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2072179U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111022736A (en) * | 2019-12-20 | 2020-04-17 | 广州朗达电子设备有限公司 | Evaporating pressure regulating valve capable of electrically regulating pressure |
-
1990
- 1990-04-05 CN CN 90212093 patent/CN2072179U/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111022736A (en) * | 2019-12-20 | 2020-04-17 | 广州朗达电子设备有限公司 | Evaporating pressure regulating valve capable of electrically regulating pressure |
| CN111022736B (en) * | 2019-12-20 | 2022-04-22 | 广州朗达电子设备有限公司 | Evaporating pressure regulating valve capable of electrically regulating pressure |
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