CN203441733U - Exhaust valve for diaphragm metering pump - Google Patents
Exhaust valve for diaphragm metering pump Download PDFInfo
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- CN203441733U CN203441733U CN201320490685.3U CN201320490685U CN203441733U CN 203441733 U CN203441733 U CN 203441733U CN 201320490685 U CN201320490685 U CN 201320490685U CN 203441733 U CN203441733 U CN 203441733U
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- valve
- metering pump
- valve seat
- passage
- exhaust
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Abstract
The utility model relates to an exhaust valve for a diaphragm metering pump, wherein the exhaust valve is vertically mounted at the highest part of a hydraulic oil cavity and is composed of a valve body and a valve seat. The valve seat is sleeved inside the valve body. The interior of the valve seat is provided with a central channel along the middle axis of the valve seat. The top and the bottom of the central channel are respectively provided with a valve ball. A compression spring is arranged in the central channel. Along the middle axis of the valve body, an exhaust channel is arranged inside the valve body and is communicated with the central channel inside the valve seat. The exhaust channel is communicated with the bottom of the hydraulic oil cavity. Compared with the prior art, the exhaust valve is in the form of a ball valve with a spring, thus being capable of conveniently mounted on the hydraulic oil cavity of a diaphragm metering pump. Meanwhile, the exhaust valve is installed in the form of an individual module, so that the exhaust valve has the advantages of simple structure and good exhaust effect. Meanwhile, the metering accuracy of the metering pump is improved.
Description
Technical field
The utility model relates to a kind of outlet valve, especially relates to a kind of diaphragm metering pump outlet valve.
Background technique
The conventional exhaust structure of diaphragm metering pump mostly is pin bushing-type at present, by the gap between exhaust pin and guide, extrudes gas when pressure raises.Because pin is limited to the resilience of valve ball, easily cause the leakage of hydraulic oil and the backflow of Exhaust Gas.And the outlet valve of structure is all combined with relief valve at present, its structure relative complex.
Diaphragm metering pump is to utilize flexible partition to separate hydraulic oil and the fluid that is measured, and plunger drives barrier film equably by hydraulic oil, makes barrier film to-and-fro motion, completes suction, discharge process, realizes the accurate quantification of fluid and carries.Because hydraulic system is to work, so can inevitably mix air in hydraulic oil under atmospheric pressure environment.The air mixing in fluid, along with fluid flows, dissolves in fluid or smaller volume when pressure raises, and when pressure decreased, from fluid, bubble or volume become greatly.The existence of the gas in fluid has a strong impact on the measuring accuracy of metering pump, and with noise and vibration.Therefore need to use outlet valve the gas exudate pumping cavity of blending in hydraulic oil.
Application number is that 200780050432.1 Chinese patent discloses a kind of outlet valve, and this outlet valve comprises the outer sleeve that comprises exhaust window, is arranged on the housing in outer sleeve, is also provided with air vent on housing, air vent be provided with dividing plate above.This kind of outlet valve can prevent carrying of liquid under dynamic condition, but do not overcome the poor effect of original outlet valve spring-back force, the i.e. undesirable shortcoming of high-pressure and hydraulic oil seal and exhaust effect.
Application number is that the Chinese patent of 200820073024.x discloses a kind of membrane-type differential vent valve, be provided with upper film chamber and lower film chamber, the valve seat of upper film chamber is provided with inlet hole, inlet hole adopts pipeline to be connected with offgas duct, between the valve seat of lower film chamber and valve gap, be provided with waveform barrier film, the top of barrier film contacts with valve rod.Although this patent application can be adjusted the number of air displacement to maintain system pressure, and original film chamber has been divided into upper and lower two, structure is further complicated.
Model utility content
The purpose of this utility model is exactly that a kind of simple in structure, easy to use, diaphragm metering pump outlet valve that interchangeability is good is provided in order to overcome the defect that above-mentioned prior art exists.
The purpose of this utility model can be achieved through the following technical solutions:
An outlet valve, is vertically arranged on the highest point of the hydraulic fluid chamber of metering pump, and the constituent components of this outlet valve comprises valve body and valve seat,
Described valve seat is set in described valve inner,
Described valve seat inside offers central passage along central axis direction, and top and the bottom of this central passage arrange valve ball, are provided with Compress Spring in central passage,
Described valve inner offers along central axis direction the ，Gai exhaust passage, exhaust passage being connected with the inner center line passage of valve seat and is communicated with the hydraulic fluid chamber of bottom.
Described valve seat top is arranged with valve ball stop collar, and restriction is arranged on the position of central passage top valve ball.
The top of described central passage and the diameter of bottom are greater than the diameter at middle part, the upper sealing surface of passage centered by the junction surface at top and middle part, the lower sealing surface of passage centered by the junction surface at bottom and middle part.
Between described valve ball and central passage madial wall, there is radial clearance.
O type circle for sealing is set on the surface of contact of described valve seat and described valve body.
O type circle for sealing is set on the surface of contact of described valve body and described hydraulic fluid chamber.
Compared with prior art, the utility model has overcome in original outlet valve pin to the poor effect of valve ball spring-back force, it is the undesirable shortcoming of high-pressure and hydraulic oil seal and exhaust effect, adopt ball valve to add the design of spring, can be arranged on easily on the hydraulic fluid chamber of diaphragm metering pump, and there is the installation form of separate modular, simple in structure, good exhaust effect, the measuring accuracy that is conducive to improve metering pump, has the following advantages:
(1) simple in structure, be integral separately, installation, maintenance, check all easy;
(2) interchangeability is good, and pin bushing-type exhaust structure need to be changed the pin of different-diameter according to the pressure of pump, to adjust gap, exhaust passage;
(3) exhaust spring is strong to the resilience of valve ball compared with pin to the resilience of valve ball, has effectively improved the sealability of venting ball valve;
(4) reduction of spring freely, can effectively avoid in original structure because the gap between pin cylindrical and guide is too small, if while having greasy dirt in gap and affect moving up and down of ball valve, directly affect the sealing of ball valve, cause the leakage of high pressure liquid force feed and the gas that has been discharged in guide gap refluxes.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure, 1 is that valve ball stop collar, 2 is that upper valve ball, 3 is that valve seat, 4 is that valve body, 5 is that spring, 6 is that lower valve ball, 7 is that upper O type circle, 8 is that lower O type circle, 9 is hydraulic fluid chamber.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is elaborated.
Embodiment
An outlet valve, its structure as shown in Figure 1, is vertically arranged on the highest point of the hydraulic fluid chamber 9 of metering pump, being mainly comprised of valve body 4, valve seat 3 and relevant Component of this outlet valve.Valve seat 3 is set in valve body 4.Inside at valve seat 3 offers central passage along central axis direction, and the top of this central passage and bottom are respectively arranged with upper valve ball 2 and lower valve ball 6 are set, and are also provided with in addition spring 5 in central passage.The top of valve seat 3 is arranged with valve ball stop collar 1, and restriction is arranged on the position of the upper valve ball 2 at central passage top.The top of central passage and the diameter of bottom are greater than the diameter at middle part, the upper sealing surface of passage centered by the junction surface at top and middle part, the lower sealing surface of passage centered by the junction surface at bottom and middle part.Between two valve balls and central passage madial wall, there is radial clearance.
In valve body 4 inside, along central axis direction, offering the ，Gai exhaust passage, exhaust passage being connected with the inner center line passage of valve seat 3 is communicated with the hydraulic fluid chamber 9 of bottom.This outlet valve has good sealability, sealing is set on the surface of contact of valve seat 3 and valve body 4 and uses O type circle 7, and lower O type circle 8 for sealing is set on the surface of contact of valve body 4 and hydraulic fluid chamber 9.
The utility model in use, in induction stroke, in hydraulic fluid chamber 9, it is negative pressure, upper valve ball 2 is pressed on the sealing surface on valve seat 3 tops, prevent that ambient atmos from entering hydraulic fluid chamber 9, the commencing height of valve ball stop collar 1 restriction upper valve ball 2, lower valve ball 6 is pressed on the sealing surface of valve body 4 in induction stroke by spring 5 simultaneously, the seal style of the two ball valves of this dependence, can avoid the infiltration of ambient atmos completely.At discharge stroke, rapid rising along with pressure, make the pressure of hydraulic oil overcome spring force, lift lower valve ball 6, contact with the sealing surface of valve seat 3 bottoms, to prevent that hydraulic oil under high pressure leaking, simultaneously in the uphill process of lower valve ball 6, small bubble in hydraulic oil rise rapidly under floating function, walk around the radial clearance of lower valve ball 6, then by the passage at valve seat 3 centers, overflow.
Below the action principle in using process is described further: the gas mixing in hydraulic oil under floating function along passage rise to lower valve ball 6 below.At the discharge stroke of metering pump, along with the rapid rising of pressure, the pressure of hydraulic oil overcomes the active force of spring 5, lifts lower valve ball 6; In the process rising at lower valve ball 6, the small bubble in hydraulic oil rise rapidly under buoyancy and pressure-acting, walk around the radial clearance of lower valve ball 6, and right mistake is overflowed by the passage at valve seat 3 centers; Along with the continuation of lower valve ball 6 is risen, contact with the sealing surface of valve seat 3 bottoms, can play again the effect of sealed high pressure hydraulic oil, prevent that hydraulic oil under high pressure leaking.In induction stroke, in hydraulic fluid chamber 9, be negative pressure, upper valve ball 2 is pressed on the sealing surface on valve seat 3 tops, prevents that ambient atmos is inhaled into hydraulic fluid chamber 9, lower valve ball 6 drops on the potted line of valve body 4 under the effect of spring 5 simultaneously, also plays again the chance that sealing ambient atmos mixes hydraulic oil.
Claims (6)
1. a diaphragm metering pump outlet valve, is vertically arranged on the highest point of the hydraulic fluid chamber of metering pump, it is characterized in that, the constituent components of this outlet valve comprises valve body and valve seat,
Described valve seat is set in described valve inner,
Described valve seat inside offers central passage along central axis direction, and top and the bottom of this central passage arrange valve ball, are provided with Compress Spring in central passage,
Described valve inner offers along central axis direction the ，Gai exhaust passage, exhaust passage being connected with the inner center line passage of valve seat and is communicated with the hydraulic fluid chamber of bottom.
2. a kind of diaphragm metering pump outlet valve according to claim 1, is characterized in that, described valve seat top is arranged with valve ball stop collar, and restriction is arranged on the position of central passage top valve ball.
3. a kind of diaphragm metering pump outlet valve according to claim 1, it is characterized in that, the top of described central passage and the diameter of bottom are greater than the diameter at middle part, the upper sealing surface of passage centered by the junction surface at top and middle part, the lower sealing surface of passage centered by the junction surface at bottom and middle part.
4. according to a kind of diaphragm metering pump outlet valve described in claim 1 or 3, it is characterized in that, between described valve ball and central passage madial wall, have radial clearance.
5. a kind of diaphragm metering pump outlet valve according to claim 1, is characterized in that, O type circle for sealing is set on the surface of contact of described valve seat and described valve body.
6. a kind of diaphragm metering pump outlet valve according to claim 1, is characterized in that, O type circle for sealing is set on the surface of contact of described valve body and described hydraulic fluid chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320490685.3U CN203441733U (en) | 2013-08-12 | 2013-08-12 | Exhaust valve for diaphragm metering pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320490685.3U CN203441733U (en) | 2013-08-12 | 2013-08-12 | Exhaust valve for diaphragm metering pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203441733U true CN203441733U (en) | 2014-02-19 |
Family
ID=50092792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320490685.3U Expired - Fee Related CN203441733U (en) | 2013-08-12 | 2013-08-12 | Exhaust valve for diaphragm metering pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203441733U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110792782A (en) * | 2019-11-08 | 2020-02-14 | 陕西航天动力高科技股份有限公司 | Diaphragm pump hose fault monitoring device |
| CN113279954A (en) * | 2021-06-17 | 2021-08-20 | 浙江力高泵业科技有限公司 | Hydraulic pump with long service life |
-
2013
- 2013-08-12 CN CN201320490685.3U patent/CN203441733U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110792782A (en) * | 2019-11-08 | 2020-02-14 | 陕西航天动力高科技股份有限公司 | Diaphragm pump hose fault monitoring device |
| CN113279954A (en) * | 2021-06-17 | 2021-08-20 | 浙江力高泵业科技有限公司 | Hydraulic pump with long service life |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140219 Termination date: 20180812 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |