CN203214903U - Piston gas flowmeter switch valve - Google Patents
Piston gas flowmeter switch valve Download PDFInfo
- Publication number
- CN203214903U CN203214903U CN 201320230467 CN201320230467U CN203214903U CN 203214903 U CN203214903 U CN 203214903U CN 201320230467 CN201320230467 CN 201320230467 CN 201320230467 U CN201320230467 U CN 201320230467U CN 203214903 U CN203214903 U CN 203214903U
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- Prior art keywords
- piston
- switch valve
- flowmeter
- screw rod
- opening
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 238000007789 sealing Methods 0.000 claims description 23
- 239000011148 porous material Substances 0.000 claims description 16
- 238000005259 measurement Methods 0.000 abstract description 11
- 210000000664 rectum Anatomy 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
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- Measuring Volume Flow (AREA)
Abstract
本实用新型涉及气体流量计量技术领域，公开了一种活塞式气体流量计开关阀，其包括上下设置的上腔体和下腔体，下腔体分别与流量计的进气嘴和活塞筒的下气孔连通，上腔体分别与流量计的出气嘴和活塞筒的上气孔连通，上腔体的底部设有第一开口，下腔体的顶部与所述第一开口相对的位置设有第二开口，第一开口内设有密封件，密封件的下方连接有螺杆，螺杆延伸至所述下腔体的内部，螺杆连接有升降驱动装置。本实用新型采用上、下腔体、密封件、螺杆和升降驱动装置相配合快速切换流量计中的气路，可快速实现活塞式气体流量计的流路接入和流路旁路。当活塞式气体流量计的气流流入旁路时可实现活塞从活塞筒快速复位到底部，等待进行下一次的测量。
The utility model relates to the technical field of gas flow metering, and discloses a piston-type gas flowmeter switch valve, which includes an upper cavity and a lower cavity arranged up and down, and the lower cavity is respectively connected with the gas inlet nozzle of the flowmeter and the piston barrel. The lower air hole is connected, and the upper chamber is respectively connected with the air outlet of the flowmeter and the upper air hole of the piston barrel. The bottom of the upper chamber is provided with a first opening, and the top of the lower chamber is provided with a second Two openings, a seal is provided in the first opening, a screw is connected under the seal, the screw extends to the inside of the lower cavity, and the screw is connected with a lifting drive device. The utility model adopts upper and lower chambers, seals, screw rods and a lifting drive device to quickly switch the gas path in the flowmeter, and can quickly realize the flow path access and flow path bypass of the piston type gas flowmeter. When the air flow of the piston gas flowmeter flows into the bypass, the piston can be quickly reset from the piston barrel to the bottom, waiting for the next measurement.
Description
Technical field
The utility model relates to measurement of gas flow technical field, particularly relates to a kind of piston type gas flow meter switch valve.
Background technique
The speed that the piston type gas flow meter moves in piston cylinder by piston characterizes the flow of gas.The metering system of this gas flow can be traced to the source, and belongs to elementary gas flow calibration mode, and precision and soap film flowmeter are suitable.But this mode has a very big defective, needs switching gas circuit to make piston be returned to the bottom of piston cylinder before each exactly measurement beginning.At present, the critical component that is used for the switching flow switch adopts solenoid valve more, the solenoid valve stature that latus rectum is bigger is also big, and the little solenoid valve stature of latus rectum is little, for the piston type gas flow meter of the quick switching gas circuit of needs, need wide-aperture switch valve, but the big solenoid valve stature of latus rectum can't be applicable in the gas flowmeter too greatly, and the little solenoid valve of latus rectum is longer for the gas circuit handoff procedure, can not carry out gas flow measurement continuously.
The utility model is intended to introduce a kind of mechanism, makes instrument can finish the homing action of piston automatically after the piston type gas flow meter is whenever finished a flow measurement, makes the piston type gas flow meter can carry out continuous measurement.
The model utility content
(1) technical problem that will solve
The purpose of this utility model provides a kind of piston type gas flow meter switch valve, provides gas flow measurement continuously with quick switching gas circuit.
(2) technological scheme
In order to solve the problems of the technologies described above, the utility model provides a kind of piston type gas flow meter switch valve, it comprises upper cavity and the lower chamber of upper and lower settings, described lower chamber is communicated with the air inlet nozzle of flowmeter and the following pore of piston cylinder respectively, described upper cavity is communicated with the outlet nozzle of flowmeter and the last pore of piston cylinder respectively, the bottom of described upper cavity is provided with first opening, the position relative with described first opening, the top of described lower chamber is provided with second opening, be provided with Sealing in described first opening, the below of described Sealing is connected with screw rod, described screw rod extends to the inside of described lower chamber, and described screw rod is connected with lift driving mechanism.
Further, the top of described Sealing also is provided with guide rod, is with spring on the described guide rod, and the joint of described spring and described Sealing is provided with spring tray, and described spring is in compressive state all the time.
Further, the top of described screw rod penetrates the bottom of described guide rod.
Further, described lift driving mechanism comprises motor and eccentric cam, and described motor is connected with eccentric cam is coaxial, and the top of described eccentric cam props up the bottom of described screw rod.
Further, also be provided with middle chamber between described upper cavity and the lower chamber.
Further, the diameter of described middle chamber is bigger than the diameter of the last pore of described piston cylinder and following pore.
Further, described sealing gasket is rubber pad.
(3) beneficial effect
A kind of piston type gas flow meter switch valve that technique scheme provides, it adopts upper and lower cavity, Sealing, screw rod and lift driving mechanism to match to switch fast the gas circuit in the flowmeter, after making that gas flowmeter is whenever finished a flow measurement, open a bigbore bypass of gas flow, can realize that piston resets to the bottom fast from piston cylinder, can realize piston motion up or down fast, realize the continuous measurement of gas flow.
Description of drawings
Fig. 1 is the sectional view of the utility model piston type gas flow meter switch valve;
Fig. 2 is the axonometric drawing of the utility model eccentric cam;
Fig. 3 is the utility model schematic diagram of gas circuit.
Wherein, 1, upper cavity; 2, lower chamber; 3, air inlet nozzle; 4, piston cylinder; 41, following pore; 42, go up pore; 5, outlet nozzle; 6, Sealing; 7, screw rod; 8, guide rod; 9, spring; 10, spring tray; 11, motor; 12, eccentric cam; 121, the low side of eccentric cam; 122, eccentric cam is high-end; 13, piston; 14, middle chamber; 20, switch valve; 30, piston and piston cylinder assembly parts.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples are used for explanation the utility model, but are not used for limiting scope of the present utility model.
As Fig. 1, a kind of piston type gas flow meter switch valve of the utility model preferred embodiment, it comprises upper cavity 1 and the lower chamber 2 of upper and lower settings, lower chamber 2 is communicated with the air inlet nozzle 3 of flowmeter and the following pore 41 of piston cylinder 4 respectively, piston 13 and piston cylinder 4 clearance seals, piston cylinder 13 is glass infuser, upper cavity 1 is communicated with the outlet nozzle 5 of flowmeter and the last pore 42 of piston cylinder respectively, the bottom of upper cavity 1 is provided with first opening, the position relative with first opening, the top of lower chamber 2 is provided with second opening, be provided with Sealing 6 in first opening, the below of the seal 6 is connected with screw rod 7, this screw rod 7 extends to the inside of lower chamber 2, and screw rod 7 is connected with lift driving mechanism.
Move up and down in upper cavity and lower chamber by lift driving mechanism drive screw 7, and then drive Sealing 6 moves up and down in upper cavity 1, when Sealing 6 is positioned at first opening, can turn-off the air-flow between upper cavity and the lower chamber, at this moment, air-flow enters and promotes piston 13 through the following pore of piston cylinder and moves upward fast; When Sealing 6 moves upward when breaking away from first opening, upper cavity and lower chamber are communicated with, and air-flow outwards flows out through the upper cavity outlet nozzle of flowing through, and at this moment, piston 13 moves downward under the gravity effect fast.Preferably, sealing gasket 6 is rubber pad.
The top of Sealing also is provided with guide rod 8, is with spring 9 on the guide rod 8, and spring 9 is provided with spring tray 10 with the joint of Sealing 6, and spring 9 is in compressive state all the time.It is in order to make Sealing and screw rod to automatically reset that spring 9 is set; Be in order to keep the motion of spring vertical direction, to prevent the spring sideslip and guide rod 8 is set.
The top of screw rod 7 penetrates the bottom of guide rod 8, can strengthen the stability of elevating movement.
As shown in Figure 2, lift driving mechanism comprises motor 11 and eccentric cam 12, and this motor is connected with eccentric cam is coaxial, and the top of eccentric cam props up the bottom of screw rod.The top of eccentric cam 12 has the low side position and with respect to the high-end position at this low side position.
The utility model embodiment also is provided with middle chamber 14 between upper cavity 1 and lower chamber 2.
The diameter of middle chamber is bigger than the diameter of the last pore of piston cylinder and following pore, is preferably and is at least big twice, can guarantee the rapid movement of piston.
As shown in figures 1 and 3, among Fig. 3,20 representation switch valves, 30 represent piston and piston cylinder assembly parts, and gas enters lower chamber 2 from air inlet nozzle 3, when the low side 121 of eccentric cam props up the bottom of screw rod, Sealing 6 is positioned at first opening, air-flow between upper cavity and the lower chamber is turned off, and at this moment, air-flow enters and promotes piston through the following pore of piston cylinder and moves upward fast; When high-end 122 of eccentric cam propped up the bottom of screw rod 7, Sealing 6 moved upward and breaks away from first opening, the airflow connection between upper cavity 1 and the lower chamber 2, form bypass of gas flow, air-flow outwards flows out through the upper cavity outlet nozzle of flowing through, and at this moment, piston moves downward under the gravity effect fast.
Piston type gas flow meter switch valve of the present utility model, adopt upper and lower cavity, Sealing, screw rod and lift driving mechanism to match to switch fast the gas circuit in the flowmeter, after making that gas flowmeter is whenever finished a flow measurement, open a bigbore bypass of gas flow, can realize that piston resets to the bottom fast from piston cylinder, waits for next time and measuring, therefore, can realize piston motion up or down fast, realize the continuous measurement of gas flow.
The above only is preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvement and replacement, these improvement and replacement also should be considered as protection domain of the present utility model.
Claims (7)
1. piston type gas flow meter switch valve, it is characterized in that, the upper cavity and the lower chamber that comprise upper and lower settings, described lower chamber is communicated with the air inlet nozzle of flowmeter and the following pore of piston cylinder respectively, described upper cavity is communicated with the outlet nozzle of flowmeter and the last pore of piston cylinder respectively, the bottom of described upper cavity is provided with first opening, the position relative with described first opening, the top of described lower chamber is provided with second opening, be provided with Sealing in described first opening, the below of described Sealing is connected with screw rod, described screw rod extends to the inside of described lower chamber, and described screw rod is connected with lift driving mechanism.
2. switch valve as claimed in claim 1 is characterized in that, the top of described Sealing also is provided with guide rod, is with spring on the described guide rod, and the joint of described spring and described Sealing is provided with spring tray, and described spring is in compressive state all the time.
3. switch valve as claimed in claim 2 is characterized in that, the top of described screw rod penetrates the bottom of described guide rod.
4. switch valve as claimed in claim 1 is characterized in that, described lift driving mechanism comprises motor and eccentric cam, and described motor is connected with eccentric cam is coaxial, and the top of described eccentric cam props up the bottom of described screw rod.
5. switch valve as claimed in claim 1 is characterized in that, also is provided with middle chamber between described upper cavity and the lower chamber.
6. switch valve as claimed in claim 5 is characterized in that, the diameter of described middle chamber is bigger than the diameter of the last pore of described piston cylinder and following pore.
7. switch valve as claimed in claim 1 is characterized in that, described sealing gasket is rubber pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320230467 CN203214903U (en) | 2013-04-28 | 2013-04-28 | Piston gas flowmeter switch valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320230467 CN203214903U (en) | 2013-04-28 | 2013-04-28 | Piston gas flowmeter switch valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203214903U true CN203214903U (en) | 2013-09-25 |
Family
ID=49204442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320230467 Expired - Lifetime CN203214903U (en) | 2013-04-28 | 2013-04-28 | Piston gas flowmeter switch valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203214903U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104121374A (en) * | 2013-04-28 | 2014-10-29 | 北京市劳动保护科学研究所 | Piston type gas flowmeter switch valve |
-
2013
- 2013-04-28 CN CN 201320230467 patent/CN203214903U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104121374A (en) * | 2013-04-28 | 2014-10-29 | 北京市劳动保护科学研究所 | Piston type gas flowmeter switch valve |
| CN104121374B (en) * | 2013-04-28 | 2016-06-29 | 北京市劳动保护科学研究所 | Piston type gas flow meter switch valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130925 Effective date of abandoning: 20160629 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |