CN101929574A - Dynamic balance motor-driven pressure-difference valve - Google Patents
Dynamic balance motor-driven pressure-difference valve Download PDFInfo
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- CN101929574A CN101929574A CN 201010285695 CN201010285695A CN101929574A CN 101929574 A CN101929574 A CN 101929574A CN 201010285695 CN201010285695 CN 201010285695 CN 201010285695 A CN201010285695 A CN 201010285695A CN 101929574 A CN101929574 A CN 101929574A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 230000007246 mechanism Effects 0.000 claims abstract description 14
- 230000004888 barrier function Effects 0.000 claims description 35
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 30
- 238000007789 sealing Methods 0.000 claims description 16
- 229910052799 carbon Inorganic materials 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 8
- 208000002925 dental caries Diseases 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 description 26
- 229910002804 graphite Inorganic materials 0.000 description 20
- 239000010439 graphite Substances 0.000 description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- 238000009304 pastoral farming Methods 0.000 description 14
- 230000001276 controlling effect Effects 0.000 description 10
- 229910052742 iron Inorganic materials 0.000 description 7
- 230000009467 reduction Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 230000003292 diminished effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 3
- 230000001052 transient effect Effects 0.000 description 3
- 210000004907 gland Anatomy 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009711 regulatory function Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/20—Control of fluid pressure characterised by the use of electric means
- G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
- G05D16/2013—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means
- G05D16/202—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means actuated by an electric motor
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Fluid-Driven Valves (AREA)
Abstract
The invention provides a dynamic balance motor-driven pressure-difference valve, belonging to the technical field of valves, and solving the problem of a complicated structure of the existing dynamic balance motor-driven pressure-difference valve. The dynamic balance motor-driven pressure-difference valve comprises a valve rod, a valve core, a valve body and an electric actuator, wherein the inner part of the valve body is provided with a cavity; the electric actuator is fixedly connected with the valve body; the valve body is provided with an inner port end and an outer port end which are communicated with the inner cavity of the valve body; the valve core is positioned in the valve body; the inner end of the valve rod is positioned in the valve body and is connected with the valve core; the outer end of the valve body extends out of the valve body, is connected with the electric actuator and can drive a valve rod of the electric actuator move up and down; the valve body is internally provided with a diaphragm which divides the valve body into two neighboring cavities at the upper part and the lower part, namely control cavity and through water cavity; the valve body is provided with a deflector hole which communicates the water inlet end of the valve body and the control cavity; the diaphragm is provided with an adjusting mechanism which can reduce the openness degree of the valve when the pressure of the inlet end is increased, and can increase the openness degree of the valve when the pressure of the inlet end is reduced. The invention has advantages of simple structure and convenient assembly and the like.
Description
Technical field
The invention belongs to valve technology field, relate to a kind of motor-driven pressure-difference valve, particularly a kind of dynamic balance motor-driven pressure-difference valve.
Background technique
Motor-driven pressure-difference valve is the incorporate product of transient equiliblium and motorized adjustment, mainly be applicable to the terminal air-conditioning equipment of heating ventilation air-conditioning system, temperature control as air-conditioning box, new blower fan group, air processing machine etc., by configuration intelligent object control gear, can control automatically flow, the temperature of each loop easily, realize rationally utilizing energy, energy-saving and cost-reducing, intelligent management.Use this valve and make end-equipment only be subjected to the influence of standard control signal, and the influence that not fluctuateed by system pressure, it is more stable, more energy-conservation that system is regulated, and is specially adapted in the system loading variation variable flow system greatly.
Motor-driven pressure-difference valve has the regulatory function of pressure reduction, and regulatory function is meant that valve can be according to the aperture of the automatic regulating valve of variation of target area temperature control signals, thereby changes water flow, finally makes the true temperature of target area consistent with setting temperature.
This type of valve of Chu Xianing such as the disclosed a kind of dynamic balance motor-driven pressure-difference valve of patent (CN201265680Y) in the market, the honeycomb duct that comprises an electric control valve and two ends thereof, be equiped with differential pressure controller on the honeycomb duct at electric control valve top, differential pressure controller comprises valve body, valve plug, spring, diaphragm, film chamber and PRESSURE PIPE.This installs when the variation in pressure of the liquid that flows into, and the valve plug of differential pressure controller moves up and down automatically, regulates the streamflow of pod apertures, and the differential pressure that reaches the electric control valve two ends is constant.
But this device also exists defective, at first the adjusting of the pressure reduction of this device relies on electric control valve and differential pressure controller, these two parts are independent separately, level of integration is very low, not only make whole structure complicated more, and having improved the difficulty of assembling, the volume of the integral body of this device is also bigger simultaneously.
Summary of the invention
The objective of the invention is the problems referred to above, a kind of dynamic balance motor-driven pressure-difference valve simple in structure, easy to assembly is provided at existing technology existence.
Purpose of the present invention can realize by following technical proposal: a kind of dynamic balance motor-driven pressure-difference valve, comprise valve rod, spool, inner valve body and the electric actuator that is connected on the valve body for cavity, have the entrance point and the outlet end that communicate with its inner chamber on the valve body, spool is positioned at valve body, the inner of valve rod is positioned at valve body and links to each other with spool, the outer end of valve rod stretches out that valve body links to each other with electric actuator and electric actuator can actuate valve stem move up and down, it is characterized in that, also be provided with barrier film in the described valve body, barrier film is divided into two neighbouring cavitys with valve body: control chamber, the water flowing chamber, has the pod apertures that the valve inleting water end is connected with control chamber on the described valve body, have on the described barrier film when entrance point pressure increases and to reduce the valve opening degree, reduce to increase the controlling mechanism of valve opening degree when entrance point pressure.
Electric actuator drives spool by valve rod and moves up and down, and treats that spool moves the back and makes the user obtain a constant flow by this valve.Certainly, water can be passed through by the gap between spool and the valve body in this process.
Current enter into the water flowing chamber from the entrance point of valve body, and wherein a part of current enter control chamber by pod apertures simultaneously.
When the pressure of entrance point became big, the hydraulic pressure in the control chamber was greater than the hydraulic pressure in the water flowing chamber, and the pressure reduction of formation makes the controlling mechanism on the barrier film reduce the valve opening degree in control chamber and the water flowing chamber, made the pressure balance at these valve core two ends; When the pressure of entrance point diminished, the pressure reduction that forms in control chamber and the water flowing chamber made the controlling mechanism on the barrier film increase the valve opening degree, made the pressure balance at these valve core two ends.
Just say that also this dynamic balance motor-driven pressure-difference valve is not subjected to the influence of the variation in pressure of entrance point.This dynamic balance motor-driven pressure-difference valve is integrated in the controlling mechanism on electric actuator and the barrier film on the valve body, not only simplifies the structure, and has omitted shell separately, can concentrate assembling simultaneously in the assembly process of valve, improves the efficient of assembling.
In above-mentioned a kind of dynamic balance motor-driven pressure-difference valve, described controlling mechanism is Returnning spring and is connected in regulating piston on the barrier film, and Returnning spring has to move down at regulating piston between regulating piston and the valve body and under the elastic force effect at Returnning spring makes the outlet end opening degree become big trend.Hydraulic pressure in the control chamber has active force upwards to regulating piston, hydraulic pressure in the water flowing chamber has downward effect to regulating piston, the deadweight of piston has downward active force to it, Returnning spring has downward active force to it, after transient equiliblium, the active force of the both direction on the regulating piston keeps balance, but after the hydraulic pressure in the control chamber wherein becomes greatly, piston can move up and reduce the opening degree of outlet end, after the hydraulic pressure in the control chamber wherein diminished, piston can move down the opening degree that increases outlet end.
In above-mentioned a kind of dynamic balance motor-driven pressure-difference valve, described adjusting is pressed between piston and the barrier film and is provided with piston rod, and an end and the regulating piston of piston rod are connected, and the other end and the barrier film of piston rod are connected.The barrier film quality is softer, can drive the same up and down moved further of piston rod along with the hydraulic pressure in the control chamber is out of shape up and down, and piston rod drives the same moved further of regulating piston.
In above-mentioned a kind of dynamic balance motor-driven pressure-difference valve, described controlling mechanism comprises that also one is connected in the valve body and its sidepiece has the guide cylinder of outlet, above-mentioned spool can be resisted against the guide cylinder upper end and form sealing, and above-mentioned regulating piston is positioned at guide cylinder and contacts with the guide cylinder side seal.Cavity between guide cylinder and the regulating piston upper end is the water flowing chamber, and behind the employing guide cylinder, the manufacturability of valve is better, as long as make the precision of guide cylinder and material reach standard, can relax requirement to the technology of valve body.
In above-mentioned a kind of dynamic balance motor-driven pressure-difference valve, the outlet on the described guide cylinder is 2-4.The guide cylinder sidepiece is circumferentially all arranged in outlet.
In above-mentioned a kind of dynamic balance motor-driven pressure-difference valve, inboard, described guide cylinder lower end has guide portion, and above-mentioned piston rod wears and the guide portion place.Guide portion can only be done piston rod along it and is moved up and down, the moving radially of limited piston bar.
In above-mentioned a kind of dynamic balance motor-driven pressure-difference valve, have the bounding means that protrudes its sidepiece on the described piston rod, and can contact with guide portion when the piston rod travel limiter.Piston rod can not unconfinedly move up and down, and not so the amount of deformation of barrier film is excessive will break, when bounding means with after guide portion contacts, piston rod just can not continue to have moved up.
In above-mentioned a kind of dynamic balance motor-driven pressure-difference valve, being provided with between described valve rod and the valve body can be with the sealing configuration of both joint sealings.
In above-mentioned a kind of dynamic balance motor-driven pressure-difference valve, described sealing configuration comprises end cap and carbon seal ring, end cap is threadedly connected on the valve body, and above-mentioned valve rod passes valve gap, described carbon seal ring be enclosed within on the valve rod and be crushed on end cap and valve body between.End cap is the graphite stuffing box gland fixedly, and the graphite grazing cover is with the clearance seal between valve rod and the valve body, but graphite has self lubricity simultaneously, and the sliding between graphite grazing cover and the valve rod is good.
In above-mentioned a kind of dynamic balance motor-driven pressure-difference valve, described sealing configuration also comprises a top pressure spring, and the two ends of top pressure spring act on carbon seal ring and valve body respectively.The graphite grazing cover has been grown and can have been worn and torn service time, but graphite has the deformability of trace generally speaking, after between graphite grazing cover and the valve body top pressure spring being set, can make the graphite grazing cover come the compensate for wear amount by the distortion of self.
Compared with prior art, this dynamic balance motor-driven pressure-difference valve is integrated in the controlling mechanism on electric actuator and the barrier film in the valve body, not only simplifies the structure, and has omitted shell separately, simultaneously in the assembly process of valve, can concentrate assembling, improve the efficient of assembling; Adopt barrier film that the cavity in the valve body is divided into two cavitys, simple and practical; Guide cylinder is set in valve body, has improved the manufacturability of valve, reduced cost of processing; The graphite grazing cover is set between valve body and valve rod, and the graphite grazing cover has sealing and lubricated double effects, has saved extra lubricating structure.
Description of drawings
Fig. 1 is the structure cross-sectional schematic of this dynamic balance motor-driven pressure-difference valve.
Fig. 2 is the A portion enlarged view among Fig. 1.
Fig. 3 is originally to be the structural representation of the middle regulating piston of this dynamic balance motor-driven pressure-difference valve.
Fig. 4 is originally to be the structural representation of the middle guide cylinder of this dynamic balance motor-driven pressure-difference valve.
Among the figure, 1, valve body; 1a, control chamber; 1b, water flowing chamber; 1c, pod apertures; 1d, entrance point; 1e, outlet end; 2, valve gap; 3, barrier film; 4, plastic presser plate; 5, nut one; 6, piston rod; 7, iron pressing plate; 8, socket head screw; 9, resilient pad; 10, iron gasket; 11, Returnning spring; 12, bounding means; 13, circlip; 14, guide cylinder 14a, guide portion 14b, outlet; 15, regulating piston 16, spool; 17, valve rod; 18, base; 19, top pressure spring; 20, pad one; 21, pad two; 22, graphite grazing cover; 23, end cap; 24, nut two; 25, adjustment sleeve; 26, electric actuator.
Embodiment
Below be specific embodiments of the invention and in conjunction with the accompanying drawings, technological scheme of the present invention is further described, but the present invention be not limited to these embodiments.
As shown in Figure 1, this dynamic balance motor-driven pressure-difference valve, comprise valve rod 17, spool 16, inner for the valve body 1 of cavity be connected in electric actuator 26 on the valve body 1, the below of valve body 1 is fixed with valve gap 2, link to each other by socket head screw 8 between valve gap 2 and the valve body 1, be arranged with iron gasket 10 and resilient pad 9 between socket head screw 8 and the valve gap 2 successively.Have the entrance point 1d and the outlet end 1e that communicate with its inner chamber on the valve body 1, spool 16 is positioned at valve body 1, the inner of valve rod 17 is positioned at valve body 1 and links to each other with spool 16, and the outer end of valve rod 17 stretches out that valve body 1 links to each other with electric actuator 26 and electric actuator 26 can actuate valve stem 17 move up and down.Also be provided with barrier film 3 in the valve body 1, barrier film 3 is divided into two neighbouring cavitys with valve body 1: control chamber 1a, water flowing chamber 1b, has the pod apertures 1c that valve body 1 feed-water end is connected with control chamber 1a on the valve body 1, have on the barrier film 3 when entrance point 1d pressure increases and to reduce valve body 1 outlet end 1e opening degree, reduce to increase the controlling mechanism of valve body 1 outlet end 1e opening degree when entrance point 1d pressure.
Specifically, controlling mechanism is Returnning spring 11 and the regulating piston 15 that is located at barrier film 3 tops, regulate to press between piston and the barrier film 3 and be provided with piston rod 6, one end and the regulating piston 15 of piston rod 6 are connected, the other end of piston rod 6 passes barrier film 3, the position that this end of piston rod 6 is positioned at barrier film 3 belows is arranged with plastic presser plate 4 and nut 1 successively, and nut is fixed on plastic presser plate 4 on the piston rod 6.Be fixed with a sidepiece in the valve body 1 and have outlet 14 guide cylinder 14, spool 16 can be resisted against guide cylinder 14 upper ends and form sealing, and regulating piston 15 is positioned at guide cylinder 14 and contacts with guide cylinder 14 side seal.Cavity between guide cylinder 14 and regulating piston 15 upper ends is water flowing chamber 1b, and behind the employing guide cylinder 14, the manufacturability of valve is better, as long as make the precision of guide cylinder 14 and material reach standard, can relax requirement to the technology of valve body 1.Inboard, guide cylinder 14 lower end has guide portion 14a, and piston rod 6 wears the place with guide portion 14a.Guide portion 14a can only do piston rod 6 along it and moves up and down, the moving radially of limited piston bar 6.Have the bounding means 12 that protrudes its sidepiece on the piston rod 6, and can contact with guide portion 14a when piston rod 6 travel limiters 12.Barrier film 3 quality are softer, can drive the same up and down moved further of piston rod 6 along with the hydraulic pressure in the control chamber 1a is out of shape up and down, and piston rod 6 drives regulating piston 15 same moved further.Piston rod 6 can not unconfinedly move up and down, and not so the amount of deformation of barrier film 3 is excessive will break, when bounding means 12 with after guide portion 14a contacts, piston rod 6 just can not continue to have moved up.
Returnning spring 11 is between regulating piston 15 and valve body 1 and be set in outside the piston rod 6, one end of Returnning spring 11 leans the underpart at guide cylinder 14, the other end leans on barrier film 3, be provided with iron pressing plate 7 between the underpart of Returnning spring 11 and the barrier film 3, iron pressing plate 7 is set on the piston rod 6, the lower end of iron pressing plate 7 contacts with barrier film 3, and the main effect of iron pressing plate 7 is to make the lower end area of contact of Returnning spring 11 to increase.Be provided with circlip 13 between the lower end of the upper end of Returnning spring 11 and guide cylinder 14, circlip 13 increases the area of contact of spring upper end.Regulating piston 15 has the big trend of outlet end 1e opening degree change that makes that moves down under the elastic force effect of Returnning spring 11.
Hydraulic pressure in the control chamber 1a has active force upwards to regulating piston 15, hydraulic pressure in the 1b of water flowing chamber has downward effect to regulating piston 15, the deadweight of piston has downward active force to it, Returnning spring 11 has downward active force to it, after transient equiliblium, the active force of the both direction on the regulating piston 15 keeps balance, but after the hydraulic pressure in the control chamber 1a wherein becomes greatly, piston can move up and reduce the opening degree of outlet end 1e, after the hydraulic pressure in the control chamber 1a wherein diminished, piston can move down the opening degree that increases outlet end 1e.
In the present embodiment, bounding means 12 is the pin that radially is fixed on the piston rod 6, but as another kind of situation, bounding means 12 also can be the screw that radially is screwed onto on the piston rod 6.
As shown in Figure 2, be provided with between valve rod 17 and the valve body 1 and the sealing configuration of both joint sealings also can be provided with a base 18 between valve rod 17 and the valve body 1, the sealing structure is positioned at base 18 inside, be provided with pad 1 between base 18 and the valve body 1, this pad 1 plays the effect of buffering.The sealing structure comprises end cap 23 and carbon seal ring, end cap 23 is threadedly connected on the valve body 1, valve rod 17 passes valve gap 2, graphite grazing cover 22 is on the valve rod 17 and be crushed between end cap 23 and the valve body 1, be provided with top pressure spring 19 between carbon seal ring and the valve body 1, top pressure spring 19 is set on the valve rod 17, and two ends act on carbon seal ring and valve body 1 respectively.Be provided with pad 2 21 between the upper end of top pressure spring 19 and the carbon seal ring, the end of valve rod 17 also is arranged with an adjustment sleeve 25, also is provided with a nut 2 24 between adjustment sleeve 25 and the end cap 23, the length of the part lengthening valve rod 17 that adjustment sleeve 25 can be suitable.End cap 23 is graphite stuffing box gland 22 fixedly, graphite grazing cover 22 is with the clearance seal between valve rod 17 and the valve body 1, but graphite has self lubricity simultaneously, sliding between graphite grazing cover 22 and the valve rod 17 is good, graphite grazing overlaps to be grown and can wear and tear for 22 service time, but graphite has the deformability of trace generally speaking, after between graphite grazing cover 22 and the valve body 1 top pressure spring 19 being set, can make 22 distortion by self of graphite grazing cover come the compensate for wear amount.
The working principle of this device is as follows: electric actuator 26 actuate valve stem 17 move up and down and make spool 16 arrive a default position, at this moment have the gap that the stream that can supply water passes through between spool 16 and the valve body 1, make the user obtain a constant set flow by this valve this moment.
Current enter into water flowing chamber 1b from the entrance point 1d of valve body 1, and wherein a part of current enter control chamber 1a by pod apertures 1c simultaneously.When causing the pressure of this valve entrance point 1d to become big in the pipe-line system in different user's using process, pressure in the control chamber 1a is greater than the pressure in the 1b of water flowing chamber, pressure reduction between the current in control chamber 1a and the water flowing chamber 1b moves up barrier film 3 deformation, barrier film 3 drives piston rod 6 and moves up, piston rod 6 drives regulating piston 15 and moves up, regulating piston 15 parts stop the outlet on the guide cylinder 14, and the opening degree of valve diminishes, and make the pressure reduction at this valve core two ends not change; In like manner, when the pressure of entrance point 1d diminished, it is big that the opening degree of valve becomes, and makes the pressure reduction at this valve core two ends not change.
This dynamic balance motor-driven pressure-difference valve is integrated in the controlling mechanism on electric actuator 26 and the barrier film 3 in the valve body 1, not only simplifies the structure, and has omitted shell separately, can concentrate assembling simultaneously in the assembly process of valve, improves the efficient of assembling.
Specific embodiment described herein only is that the present invention's spirit is illustrated.The technician of the technical field of the invention can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Claims (10)
1. dynamic balance motor-driven pressure-difference valve, comprise valve rod (17), spool (16), inner for the valve body of cavity (1) be connected in electric actuator (26) on the valve body (1), have the entrance point (1d) and the outlet end (1e) that communicate with its inner chamber on the valve body (1), spool (16) is positioned at valve body (1), the inner of valve rod (17) is positioned at valve body (1) and links to each other with spool (16), the outer end of valve rod (17) stretches out that valve body (1) links to each other with electric actuator (26) and electric actuator (26) can actuate valve stem (17) move up and down, it is characterized in that, also be provided with barrier film (3) in the described valve body (1), barrier film (3) is divided into two neighbouring cavitys with valve body (1): control chamber (1a), water flowing chamber (1b), has the pod apertures (1c) that valve body (1) feed-water end is connected with control chamber (1a) on the described valve body (1), have on the described barrier film (3) when entrance point (1d) pressure increases and to reduce the valve opening degree, reduce to increase the controlling mechanism of valve opening degree when entrance point (1d) pressure.
2. dynamic balance motor-driven pressure-difference valve according to claim 1, it is characterized in that, described controlling mechanism is Returnning spring (11) and is connected in relief piston on the barrier film (3), Returnning spring (11) be positioned between relief piston and the valve body (1) and under the elastic force effect of Returnning spring (11) relief piston have to move down and make outlet end (1e) opening degree become big trend.
3. dynamic balance motor-driven pressure-difference valve according to claim 2, it is characterized in that, described adjusting is pressed between piston and the barrier film (3) and is provided with piston rod (6), and an end and the relief piston of piston rod (6) are connected, and the other end of piston rod (6) and barrier film (3) are connected.
4. dynamic balance motor-driven pressure-difference valve according to claim 3, it is characterized in that, described controlling mechanism comprises that also one is connected in the valve body (1) and its sidepiece has the guide cylinder (14) of outlet (14b), above-mentioned spool (16) can be resisted against guide cylinder (14) upper end and form sealing, and above-mentioned relief piston is positioned at guide cylinder (14) and contacts with guide cylinder (14) side seal.
5. dynamic balance motor-driven pressure-difference valve according to claim 4 is characterized in that, the outlet (14b) on the described guide cylinder (14) is 2-4.
6. dynamic balance motor-driven pressure-difference valve according to claim 4 is characterized in that, described guide cylinder (14) inboard, lower end has guide portion (14a), and above-mentioned piston rod (6) wears with guide portion (14a) and locates.
7. according to claim 3 or 4 or 5 or 6 described dynamic balance motor-driven pressure-difference valves, it is characterized in that, have the bounding means (12) that protrudes its sidepiece on the described piston rod (6), and can contact with guide portion (14a) when piston rod (6) travel limiter (12).
8. according to claim 1 or 2 or 3 or 4 or 5 or 6 described dynamic balance motor-driven pressure-difference valves, it is characterized in that being provided with between described valve rod (17) and the valve body (1) can be with the sealing configuration of both joint sealings.
9. dynamic balance motor-driven pressure-difference valve according to claim 8, it is characterized in that, described sealing configuration comprises end cap (23) and carbon seal ring, end cap (23) is threadedly connected on the valve body (1), above-mentioned valve rod (17) passes valve gap (2), and described carbon seal ring is enclosed within valve rod (17) and goes up and be crushed between end cap (23) and the valve body (1).
10. dynamic balance motor-driven pressure-difference valve according to claim 9 is characterized in that, described sealing configuration also comprises a top pressure spring (19), and the two ends of top pressure spring (19) act on carbon seal ring and valve body (1) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010285695 CN101929574B (en) | 2010-09-19 | 2010-09-19 | Dynamic balance motor-driven pressure-difference valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010285695 CN101929574B (en) | 2010-09-19 | 2010-09-19 | Dynamic balance motor-driven pressure-difference valve |
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| CN101929574A true CN101929574A (en) | 2010-12-29 |
| CN101929574B CN101929574B (en) | 2012-01-04 |
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| CN 201010285695 Expired - Fee Related CN101929574B (en) | 2010-09-19 | 2010-09-19 | Dynamic balance motor-driven pressure-difference valve |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104696559A (en) * | 2013-12-10 | 2015-06-10 | 凯泰阀门(集团)有限公司 | Piston type balance valve |
| CN107401529A (en) * | 2016-05-21 | 2017-11-28 | 中船绿洲镇江船舶辅机有限公司 | Gravity release hydraulicdirectional control valve |
| CN110230702A (en) * | 2018-03-06 | 2019-09-13 | 艾默生过程管理调节技术公司 | For reducing the solenoid operated valve of excessive pipeline pressure in fuid distribution system |
| CN110307386A (en) * | 2019-07-17 | 2019-10-08 | 江西艾芬达暖通科技股份有限公司 | A kind of dynamic equilibrium thermostat valve |
| CN113685594A (en) * | 2021-08-24 | 2021-11-23 | 江西艾芬达暖通科技股份有限公司 | Dynamic balance plate type valve core |
| CN114588566A (en) * | 2022-01-20 | 2022-06-07 | 抚顺华腾防护装备制造有限公司 | Positive pressure oxygen respirator pressure differential regulation and control type automatic oxygen supply device |
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|---|---|---|---|---|
| CN87213890U (en) * | 1987-09-29 | 1988-12-07 | 田中荣 | No-leaking stop valve |
| US4949754A (en) * | 1987-12-15 | 1990-08-21 | Nippon Air Brake Co., Ltd. | Pressure control valve for railway vehicles |
| DE10256035B3 (en) * | 2002-11-30 | 2004-09-09 | Danfoss A/S | Control valve for heat exchanger or heater has valve body screwed onto seat by spindle and has pressure regulating valve with opening spring and diaphragm |
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