CN209180480U - A kind of double protection mechanism of valve opening - Google Patents
A kind of double protection mechanism of valve opening Download PDFInfo
- Publication number
- CN209180480U CN209180480U CN201821948597.2U CN201821948597U CN209180480U CN 209180480 U CN209180480 U CN 209180480U CN 201821948597 U CN201821948597 U CN 201821948597U CN 209180480 U CN209180480 U CN 209180480U
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- valve
- gas source
- air
- air shut
- piston rod
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Abstract
The utility model relates to a kind of double protection mechanisms of valve opening; including the first input gas source, the second input gas source and pneumatic actuator; the first end that gas source connects the first filtering pressure reducing valve is inputted, the second end of the first filtering pressure reducing valve is separately connected the first end of the first air shut-off valve and the input terminal of solenoid valve；Pneumatic actuator includes cabinet, and cabinet is divided into spring housing, cabinet room and gas chamber by left clapboard and right clapboard.Gas source controls all the way for the utility model increase, and to assist pneumatic actuator to open valve, and the bleed pressure of assisting in opening is adjustable, to solve the problems, such as that valve requirement is opened and do not opened, it is ensured that the safe operation of chemical production device.
Description
Technical field
The utility model mechanism belongs to Self controlling valve technical field, specifically a kind of double protection machine of valve opening
Structure.
Background technique
Self controlling valve belongs to " executor " of instrument and meter for automation, as automatic controlling level is higher and higher, Chemical Manufacture
Increasingly maturation, many chemical plant installations of technique are also done increasing.The safe operation of process units, the peace of human and environment
Entirely, the safety including production equipment property, gets growing concern for and payes attention to.For the butterfly valve of pneumatic one action air to close,
In actual production use process, it is possible to which the spring force that will appear pneumatic actuator can not drive butterfly valve to open.Spring
There are many reason of power can not drive valve to open: 1, the time limit that pneumatic actuator uses is longer, spring force decaying；2, butterfly valve
Longer using the time, the sealing surface of valve seat and valve sealing ring becomes coarse, and frictional force becomes larger when valve is opened, so that
Butterfly valve torque required when opening becomes larger；3, it is the object for being easy crystallization that the medium being passed through in butterfly valve, which contains more dust or medium,
Matter, these media enter in bearing, so that the gap between butterfly valve valve rod and bearing becomes smaller, eventually lead to the change of valve opening torque
Greatly.
Summary of the invention
The purpose of this utility model is to provide a kind of double protection mechanism of valve opening, increases gas source all the way and control, come
Pneumatic actuator is assisted to open valve, and the bleed pressure of assisting in opening is adjustable, to solve valve requirement
The problem of opening and not opening, it is ensured that the safe operation of chemical production device.
According to technical solution provided by the utility model: a kind of double protection mechanism of valve opening, including the first input gas
Source, the second input gas source and pneumatic actuator, the input gas source connect the first end of the first filtering pressure reducing valve, and described the
The second end of one filtering pressure reducing valve is separately connected the first end of the first air shut-off valve and the input terminal of solenoid valve；It is described pneumatic
Executing agency includes cabinet, and the cabinet is divided into spring housing, cabinet room and gas chamber by left clapboard and right clapboard, it is described it is left every
Sliding setting piston rod, the piston rod are provided with spring bearer plate in the end of the spring housing in plate and the right clapboard, institute
State piston rod and the end of the gas chamber be provided with piston head, the piston head by gas chamber be divided into left disengaging air cavity and it is right into
Outlet chamber, is arranged spring between the spring bearer plate and the left clapboard, the piston rod is arranged in the part of the cabinet room
Sliding block, is pivotally connected crank on the cabinet, and the piston rod is slidably connected the crank by sliding block, the crank other end connection
Limit switch is installed in valve, the valve two sides；The second end of first air shut-off valve connects the left disengaging air cavity, institute
It states the second input gas source and connects the second filtering pressure reducing valve first end, the second filtering pressure reducing valve second end connects the second air control
Valve first end processed, the second air shut-off valve second end connect right disengaging air cavity, and the signal of first air shut-off valve connects
The signal receiving end of receiving end and second air shut-off valve is all connected with the output end of the solenoid valve.
The atmospheric pressure value of the first input gas source is 500KPA as a further improvement of the utility model,.
The valve is three-eccentric-butterfly-valve as a further improvement of the utility model,.
First air shut-off valve is with second air shut-off valve as a further improvement of the utility model,
Two-bit triplet air shut-off valve.
The above-mentioned air path elements connection size is 1/2 " NPT as a further improvement of the utility model,.
Described crank one end is provided with U-type groove as a further improvement of the utility model, and the piston rod is sliding by sliding block
U-type groove on the dynamic connection crank.
The utility model compared with prior art, has the advantages that
1, the utility model structure is simple, occupies little space；Increase gas source all the way to control, to assist pneumatic actuator to beat
Valve opening door.
2, the bleed pressure of the utility model assisting in opening is adjustable, opens and beats to solve valve requirement
The problem of not opening, it is ensured that the safe operation of chemical production device.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model.
Fig. 2 is the overall structure diagram of pneumatic actuator in the utility model.
Specific embodiment
The utility model is further described below with reference to specific attached drawing.
In Fig. 1, including the first input gas source 1, the first filtering pressure reducing valve 2, solenoid valve 3, the first air shut-off valve 4, second
Filtering pressure reducing valve 5, the second air shut-off valve 6, pneumatic actuator 7, left clapboard 7-1, spring housing 7-2, piston rod 7-4, spring
Pressing plate 7-5, piston head 7-6, cabinet 7-7, spring 7-8, sliding block 7-9, left disengaging air cavity 7-10, right disengaging air cavity 7-11, crank
7-12, right clapboard 7-13, cabinet room 7-14, valve 8, second input gas source 9, limit switch 10 etc..
As shown in Figure 1, the double protection mechanism of one of embodiment valve opening, including the first input gas source 1, second are defeated
Enter gas source 9 and pneumatic actuator 7, the first input gas source 1 connects the first end of the first filtering pressure reducing valve 2, and air pressure is
500KPA.The second end of first filtering pressure reducing valve 2 connects the first end of the first air shut-off valve 4 and the input terminal of solenoid valve 3,
First air shut-off valve 4 is two-bit triplet air shut-off valve.
As shown in Fig. 2, pneumatic actuator 7 includes cabinet 7-7, cabinet 7-7 is by left clapboard 7-1 and right clapboard 7-13 points
Sliding setting piston rod 7-4, piston in spring housing 7-2, cabinet room 7-14 and gas chamber, left clapboard 7-1 and right clapboard 7-13
Bar 7-4 is provided with spring bearer plate 7-5 in the end of spring housing 7-2, and piston rod 7-4 is provided with piston head 7- in the end of gas chamber
Right chamber is divided into left disengaging air cavity 7-10 and right disengaging air cavity 7-11, spring bearer plate 7-5 and left clapboard 7-1 by 6, piston head 7-6
Between spring 7-8 is set, sliding block 7-9 is arranged in the part of cabinet room 7-14 in piston rod 7-4, crank 7-12 is pivotally connected on cabinet 7-7,
The one end crank 7-12 is provided with U-type groove, the U-type groove that piston rod 7-4 is slidably connected on crank 7-12 by sliding block 7-9.Crank 7-12
Other end connecting valve 8.8 two sides of valve are installed by limit switch 10.Valve 8 is three-eccentric-butterfly-valve in the present embodiment.
As shown in Figure 1, the second end of the first air shut-off valve 4 connects left disengaging air cavity 7-10.Second input gas source 9 connects
Second filtering pressure reducing valve, 5 first end, the second filtering pressure reducing valve 5 can be adjusted its output pressure.Second filtering pressure reducing valve 5
Two ends connect 6 first end of the second air shut-off valve, and 6 second end of the second air shut-off valve connects right disengaging air cavity 7-11, air control
Making the second air shut-off valve 6 is two-position three-way valve.Above-mentioned air path elements connection size is 1/2 " NPT.
The signal receiving end of the signal receiving end of first air shut-off valve 4 and the second air shut-off valve 6 is all connected with solenoid valve 3
Output end.First air shut-off valve 4 with the pipeline of the second air shut-off valve 6 be it is opposite, the first air shut-off valve 4 is normally closed
Type, the second air shut-off valve 6 is open type.
The specific installation applicable cases of the utility model are as follows: when needing to close valve 8, solenoid valve 3 are powered, electromagnetism
Valve 3 is opened, and the first input gas source 1 passes sequentially through the first filtering pressure reducing valve 2, solenoid valve 3 enters 4 signal of the first air shut-off valve
End, the first air shut-off valve 4 is opened, and the first input gas source 1 executes machine into pneumatic by the first air shut-off valve 4 opened
Left disengaging air cavity 7-10 on structure 7, the first input gas source 1 push piston head 7-6 to slide piston rod 7-4 and sliding block 7-9 to the right,
Sliding block 7-9 drives crank 7-12 to rotate clockwise, and valve 8 is closed, and spring 7-8 is moved to right and generated with spring bearer plate 7-5's
Compression.The stop motion when valve 8 touches limit switch 10.At this point, 6 signal end of the second air shut-off valve is by solenoid valve 3
Output end conveying gas and be in closed state.
When needing Open valve 8, solenoid valve 3 is powered off, solenoid valve 3 is closed, and the first input gas source 1 can not sequentially enter
6 signal end of first air shut-off valve, 4 signal end and the second air shut-off valve, the first air shut-off valve 4 remain closed, the second air
Control valve 6 is kept it turning on, and the first input gas source 1 can not be entered on pneumatic actuator 7 by the first air shut-off valve 4 of closure
Left disengaging air cavity 7-10, and it is left disengaging air cavity 7-10 in compressed air by the first air shut-off valve 4 discharge, it is compressed
Spring 7-8 push the spring pressing plate 7-5 slides piston rod 7-4 and sliding block 7-9 to the left, and sliding block 7-9 drives crank 7-12 counterclockwise
Rotation, valve 8 is opened.
Second filtering pressure reducing valve 5 can be adjusted its output pressure, if the spring force of spring 7-8 being capable of push the spring
Pressing plate 7-5 to opening butterfly valve 8, can by the pressure set to zero of the second filtering pressure reducing valve 5, to right disengaging air cavity 7-11 into
Gas；If the spring force of spring 7-8 can not open butterfly valve 8, adjust the second filtering pressure reducing valve 5 to right disengaging air cavity 7-11 into
Gas, secondary spring 7-8 open valve 8.
Claims (5)
1. a kind of double protection mechanism of valve opening, it is characterised in that: the mechanism includes the first input gas source (1), second defeated
Enter gas source (9) and pneumatic actuator (7), the first end of input gas source (1) connection the first filtering pressure reducing valve (2), institute
State the first filtering pressure reducing valve (2) second end be separately connected the first air shut-off valve (4) first end and solenoid valve (3) it is defeated
Enter end；The pneumatic actuator (7) includes cabinet (7-7), and the cabinet (7-7) is by left clapboard (7-1) and right clapboard (7-
13) it is divided into spring housing (7-2), cabinet room (7-14) and gas chamber, in the left clapboard (7-1) and the right clapboard (7-13)
Sliding setting piston rod (7-4), the piston rod (7-4) are provided with spring bearer plate (7- in the end of the spring housing (7-2)
5), the piston rod (7-4) is provided with piston head (7-6) in the end of the gas chamber, and the piston head (7-6) is by gas chamber
It is divided into left disengaging air cavity (7-10) and right disengaging air cavity (7-11), between the spring bearer plate (7-5) and the left clapboard (7-1)
It is arranged spring (7-8), sliding block (7-9) is arranged in the part of the cabinet room (7-14) in the piston rod (7-4), the cabinet
It is pivotally connected crank (7-12) on (7-7), the piston rod (7-4) is slidably connected the crank (7-12) by sliding block (7-9), described
Limit switch (10) are installed in crank (7-12) other end connecting valve (8), valve (8) two sides；The first air control
The second end of valve (4) connects the left disengaging air cavity (7-10), and second input gas source (9) connects the second filtering pressure reducing valve
(5) first end, the second filtering pressure reducing valve (5) second end connect the second air shut-off valve (6) first end, second air
Control valve (6) second end connects right disengaging air cavity (7-11), the signal receiving end of first air shut-off valve (4) and described the
The signal receiving end of two air shut-off valves (6) is all connected with the output end of the solenoid valve (3).
2. a kind of double protection mechanism of valve opening as described in claim 1, it is characterised in that: the first input gas source
(1) atmospheric pressure value is 500KPA.
3. a kind of double protection mechanism of valve opening as described in claim 1, it is characterised in that: the valve (8) is three inclined
Heart butterfly valve.
4. a kind of double protection mechanism of valve opening as described in claim 1, it is characterised in that: first air shut-off valve
It (4) is two-bit triplet air shut-off valve with second air shut-off valve (6).
5. a kind of double protection mechanism of valve opening as described in claim 1, it is characterised in that: described crank (7-12) one end
It is provided with U-type groove, the piston rod (7-4) passes through the U-type groove that sliding block (7-9) is slidably connected on the crank (7-12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821948597.2U CN209180480U (en) | 2018-11-23 | 2018-11-23 | A kind of double protection mechanism of valve opening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821948597.2U CN209180480U (en) | 2018-11-23 | 2018-11-23 | A kind of double protection mechanism of valve opening |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209180480U true CN209180480U (en) | 2019-07-30 |
Family
ID=67374098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821948597.2U Active CN209180480U (en) | 2018-11-23 | 2018-11-23 | A kind of double protection mechanism of valve opening |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209180480U (en) |
-
2018
- 2018-11-23 CN CN201821948597.2U patent/CN209180480U/en active Active
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