CN215763920U - Throttling silencing gas circuit structure and actuating mechanism - Google Patents
Throttling silencing gas circuit structure and actuating mechanism Download PDFInfo
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- CN215763920U CN215763920U CN202120534585.0U CN202120534585U CN215763920U CN 215763920 U CN215763920 U CN 215763920U CN 202120534585 U CN202120534585 U CN 202120534585U CN 215763920 U CN215763920 U CN 215763920U
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- 230000030279 gene silencing Effects 0.000 title claims abstract description 32
- 230000007246 mechanism Effects 0.000 title abstract description 14
- 230000003584 silencer Effects 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims description 21
- 230000008030 elimination Effects 0.000 claims description 7
- 238000003379 elimination reaction Methods 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004886 process control Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008713 feedback mechanism Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
The utility model discloses a throttling and silencing gas circuit structure and an actuating mechanism. When the exhaust flow needs to be adjusted, the plugging piece is firstly detached, an external tool is used for extending into the exhaust channel, the throttle is rotated, the sectional area of the channel through which gas passes is changed to adjust the output flow of the gas, and the plugging piece is installed back after the gas is adjusted to a proper position. The discharged gas is throttled and controlled by the throttler, then is guided out to the exhaust passage, and is then silenced and discharged by the silencer. The integral structure is simple and small by splitting the throttler and the silencer, and the design of the built-in type of the airflow channel is realized, so that the appearance is simplified, the space utilization rate is improved, and the problem that the size of the existing silencing and throttling device is larger is solved.
Description
Technical Field
The utility model belongs to the technical field of throttling and silencing, and particularly relates to a throttling and silencing gas circuit structure and an actuating mechanism.
Background
The valve positioner is used as an auxiliary control instrument and forms a regulating valve together with the valve and the actuating mechanism. The electro-pneumatic valve positioner takes compressed air as a power source, receives an output electric signal from a DCS (distributed control system) system (or a regulator), controls a pneumatic regulating valve, receives a position feedback signal obtained by a valve position feedback mechanism, compares the position feedback signal with the position feedback signal, judges whether the set flow characteristic relation is consistent with the set flow characteristic relation, performs closed-loop control, regulates the air pressure entering a pneumatic actuating mechanism, and regulates the opening of the valve.
Piezoelectric valve: the piezoelectric valve is used as an electro-pneumatic converter of a valve positioner, mainly uses the piezoelectric valve technology based on piezoelectric effect materials of asymmetric structure crystals, and realizes the reversing of a two-position switch of a micro gas circuit by utilizing the principle that a functional ceramic wafer generates bending deformation under the action of voltage.
In the field of industrial automation process control, a transmitter, a regulator and a regulating valve form a common control loop, and the regulating valve is used as a final control execution element, so that the quality of process control is determined to a great extent, and the production safety of the process industry is influenced. The valve positioner is used as an auxiliary control instrument, forms a regulating valve together with a valve and an actuating mechanism, and forms a closed-loop control loop through input and feedback. The valve positioner plays a key role in improving the static and dynamic characteristics of the valve, improving the control precision and speed and increasing the control flexibility.
The pneumatic type valve is controlled by taking compressed gas with constant pressure as power and controlling the piezoelectric valve to be opened and closed quickly and at high frequency through an external control signal and a feedback position signal, so that the output pressure is adjusted in real time, the pneumatic actuator is driven to move, and the opening of the valve is controlled.
The modulation of the air source is realized by high-speed opening and closing of the piezoelectric valve to the air source. The length of the control period of the piezoelectric valve and the period of the opening and closing state of the piezoelectric valve comprehensively determine the control precision. The control process of the piezoelectric valve is the control of the air source, and besides the control of the air inlet and the air outlet, the control of the size of the discharged air flow is also needed to be participated in so as to adjust the state of the piezoelectric valve in real time. The quality of the throttling effect influences the control of the output gas, and further influences the control precision of the piezoelectric valve.
Currently, the piezoelectric valve assemblies in the pneumatic components of smart valve positioners are mostly from Heerbiger (holberger) Automation technologies, Germany. And a throttle control switch is directly integrated on the piezoelectric valve by a part of piezoelectric valves, and the output flow of the gas is adjusted by an output throttle adjusting knob switch on the piezoelectric valve. Adjusting the throttle to the appropriate flow rate can control the speed of the actuator. However, the cover needs to be opened during adjustment, and the operation is complicated.
The other part of the piezoelectric valves cancels a knob for adjusting the output flow of the gas, and a throttle adjusting structure needs to be additionally arranged on a gas circuit module of the valve positioner. Because the exhaust position of the valve positioner needs a silencing device, part of manufacturers can directly adopt a silencing throttler and integrate silencing and throttling functions on the same component. However, the traditional silencing and throttling device has the problems that the size is larger, the throttling effect is not obvious, the shape is mediocre, and when the silencing and throttling device is placed outside a valve positioner and an exhaust port is arranged externally, rainwater or other liquid in the direction of the exhaust port can enter the exhaust port, and the traditional silencing and throttling device is easy to soak.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a throttling silencing air passage structure and an actuating mechanism to solve the problem that the existing silencing throttling device is large in size.
In order to solve the problems, the technical scheme of the utility model is as follows:
the utility model relates to a throttling and silencing gas path structure, which is applied to a valve positioner and comprises a gas path module, a throttler, a silencer and a plugging piece;
an air flow channel is arranged in the air circuit module and comprises an air inlet channel and an air outlet channel which are communicated; the air inlet channel is communicated with an external air channel; a first sealing element is arranged in the joint of the air inlet channel and the exhaust channel;
the throttler is in threaded connection with the exhaust channel and used for achieving axial movement relative to the exhaust channel, a head end is arranged at one end facing the first sealing element, and a second sealing element is arranged at the head end of the throttler and used for adjusting the flow area of the airflow channel in cooperation with the first sealing element;
the silencer is arranged on the exhaust channel, is positioned at the downstream of the restrictor and is used for silencing and discharging gas in the exhaust channel;
the head end of the exhaust channel is communicated with the air inlet channel, the tail end of the exhaust channel is communicated with the outside, and the plugging piece is detachably connected to the tail end of the exhaust channel.
The throttling silencing gas path structure also comprises a pressure detection piece, wherein the pressure detection piece is arranged in the exhaust channel and is positioned between the throttling device and the silencing device.
According to the throttling silencing air path structure, the first sealing element is an annular inclined element arranged at the joint of the air inlet channel and the exhaust channel and used for forming an inclined plane in the air flow channel; the second sealing element is an inclined platform arranged at the head end of the throttler, and the inclination of the inclined platform is matched with the inclined plane.
According to the throttling and silencing gas path structure, the tail end of the throttling device is provided with a straight groove or a cross groove which is used for being matched with an external screwdriver to rotate the throttling device.
According to the throttling silencing air path structure, the plugging piece is a plug, and the plug is in threaded connection or buckled connection with the tail end of the exhaust channel.
According to the throttling silencing gas circuit structure, the pressure detection piece is a pressure gauge.
According to the throttling silencing gas path structure, the silencer is a resistive silencer or a reactive silencer or an impedance composite silencer.
The actuating mechanism comprises the throttling silencing air passage structure.
Due to the adoption of the technical scheme, compared with the prior art, the utility model has the following advantages and positive effects:
according to one embodiment of the utility model, the throttler and the silencer are detached in the airflow channel of the gas circuit module, the throttler is connected to the exhaust channel through threads, the silencer is arranged at the downstream of the throttler, and the tail end of the exhaust channel is provided with the plugging piece. When the exhaust flow needs to be adjusted, the plugging piece is firstly detached, an external tool is used for extending into the exhaust channel, the throttle is rotated, the sectional area of the channel through which gas passes is changed to adjust the output flow of the gas, and the plugging piece is installed back after the gas is adjusted to a proper position. The discharged gas is throttled and controlled by the throttler, then is guided out to the exhaust passage, and is then silenced and discharged by the silencer. The integral structure is simple and small by splitting the throttler and the silencer, and the design of the built-in type of the airflow channel is realized, so that the appearance is simplified, the space utilization rate is improved, and the problem that the size of the existing silencing and throttling device is larger is solved.
Drawings
FIG. 1 is a schematic view of a throttling noise elimination gas circuit structure of the present invention;
FIG. 2 is a schematic view of a small flow exhaust of the throttling noise elimination gas path structure of the present invention;
fig. 3 is a schematic diagram of large-flow exhaust of the throttling silencing air passage structure of the utility model.
Description of reference numerals: 1: a gas circuit module; 2: a restrictor; 3: a pressure detecting member; 4: a muffler; 5: a blocking member; 6: an exhaust passage.
Detailed Description
The throttling noise elimination gas path structure and the actuating mechanism provided by the utility model are further described in detail with reference to the accompanying drawings and specific embodiments. Advantages and features of the present invention will become apparent from the following description and from the claims.
Example one
Referring to fig. 1 to 3, in one embodiment, a throttling and noise-eliminating air channel structure applied to a valve positioner includes an air channel module 1, a throttling device 2, a noise eliminator 4 and a blocking piece 5.
Wherein, be equipped with airflow channel in the gas circuit module 1, airflow channel is including the inlet channel and the exhaust passage 6 of intercommunication. The air inlet channel is communicated with an external air channel. A first sealing element is arranged in the joint of the air inlet channel and the air outlet channel 6.
The throttler 2 is in threaded connection with the exhaust passage 6 and used for achieving axial movement relative to the exhaust passage 6, one end facing the first sealing element is a head end, and the head end of the throttler 2 is provided with a second sealing element and used for being matched with the first sealing element to adjust the flow area of the airflow passage. The muffler 4 is provided on the exhaust passage 6 downstream of the throttle 2, and muffles and discharges the gas in the exhaust passage 6.
The head end of the exhaust channel 6 is communicated with the air inlet channel, the tail end of the exhaust channel is communicated with the outside, and the blocking piece 5 is detachably connected to the tail end of the exhaust channel 6 and used for opening the exhaust channel 6 so that an external tool can stretch into the exhaust channel.
This embodiment is through in the air current passageway at gas circuit module 1, splits flow controller 2 and silencer 4, and flow controller 2 threaded connection is in exhaust passage 6, and the low reaches of flow controller 2 are located to the silencer to tail end at exhaust passage 6 sets up shutoff piece 5. When the exhaust flow needs to be adjusted, the plugging piece 5 is firstly detached, an external tool is used for extending into the exhaust channel 6, the throttler 2 is rotated, the sectional area of the channel through which gas passes is changed to adjust the output flow of the gas, and the plugging piece 5 is installed back after the adjustment to a proper position. The discharged gas is throttled and controlled by the throttle 2, then is led out to the exhaust passage 6, and is further muffled and discharged by the muffler 4. By splitting the throttler 2 and the silencer 4, the whole structure is simple and small, and the design of the built-in type of the airflow channel is realized, so that the appearance is simplified, the space utilization rate is improved, and the problem that the size of the existing silencing throttling device is larger is solved.
The adjustment mode of the throttle 2 is simple and convenient, only the plugging piece 5 needs to be opened, and the throttle 2 is rotated through an external tool, so that the throttle 2 can move axially relative to the first sealing piece in the exhaust passage 6 through threads, the gas circulation area between the first sealing piece and the second sealing piece is controlled, and the problem of inconvenience in output throttling adjustment operation of the traditional piezoelectric valve is solved.
Simultaneously, current traditional noise elimination throttling arrangement is outside for setting up at the valve locator, and the gas vent is external, can lead to gas vent direction rainwater or other liquid to get into, easily causes the scheduling problem of soaking. In the embodiment, the throttler 2 and the silencer 4 are arranged in a split mode and are arranged in the airflow channel, so that the problems of the existing silencing throttling device are solved. And the gas output flow can be steplessly adjusted through the restrictor 2, the clockwise flow is reduced, the anticlockwise flow is increased, the throttle valve is adjusted to a proper flow, and the speed of the actuating mechanism can be controlled.
The specific structure of the throttling silencing air passage structure of the present embodiment is further described below:
in this embodiment, the throttling and noise-eliminating gas path structure may further include a pressure detection element 3, where the pressure detection element 3 is disposed in the exhaust passage 6 and located between the throttling device 2 and the noise-eliminating device 4, and is used for detecting the gas pressure in the exhaust passage 6. Further, the pressure detecting member 3 may be a pressure gauge, or other device capable of detecting the pressure value in the pipe.
In this embodiment, the first seal member is an annular inclined member provided at a junction of the intake passage and the exhaust passage 6 for forming an inclined surface in the airflow passage. The second sealing element is an inclined platform arranged at the head end of the throttler 2, and the inclination of the inclined platform is matched with the inclined plane.
The throttle 2 is externally threaded on its peripheral side to connect with the internal threads of the exhaust passage 6. The tail end of the restrictor 2 is provided with a straight groove or a cross groove for matching with an external screwdriver to rotate the restrictor 2, and in other embodiments, the tail end of the restrictor 2 may have other shapes, and only an external tool needs to rotate, which is not specifically limited herein.
In this embodiment, the plugging member 5 is a plug, and the plug is in threaded connection or snap connection with the tail end of the exhaust channel 6, wherein the thread manner is easy to achieve the sealing effect.
In the present embodiment, the muffler 4 is a resistive muffler 4, a reactive muffler 4, or an impedance compound muffler 4.
Example two
An actuating mechanism comprises the throttling and noise elimination air passage structure in the first embodiment. The actuator may be an industrial valve or a valve positioner. When the exhaust flow is adjusted, the throttle 2 is rotated to change the sectional area of the passage through which the gas passes so as to adjust the output flow of the gas. When the throttler 2 is screwed clockwise, the section of the exhaust passage 6 in the gas circuit module 1 is small, the exhaust passage 6 is almost closed, the gas output flow is small, and the response speed of the actuating mechanism is slow; when the throttler 2 is screwed off anticlockwise, the section of the exhaust channel 6 in the gas circuit module 1 is large, the exhaust is smooth, the gas flow is large, and the response speed of the actuating mechanism is high. The gas after throttling adjustment is finally exhausted through the silencer 4. The integral structure is simple and small, the realization mode is flexible and changeable, and the built-in design is realized, thereby simplifying the appearance and improving the space utilization rate.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, it is still within the scope of the present invention if they fall within the scope of the claims of the present invention and their equivalents.
Claims (8)
1. A throttling silencing gas path structure is characterized by being applied to a valve positioner and comprising a gas path module, a throttler, a silencer and a plugging piece;
an air flow channel is arranged in the air circuit module and comprises an air inlet channel and an air outlet channel which are communicated; the air inlet channel is communicated with an external air channel; a first sealing element is arranged in the joint of the air inlet channel and the exhaust channel;
the throttler is in threaded connection with the exhaust channel and used for achieving axial movement relative to the exhaust channel, a head end is arranged at one end facing the first sealing element, and a second sealing element is arranged at the head end of the throttler and used for adjusting the flow area of the airflow channel in cooperation with the first sealing element;
the silencer is arranged on the exhaust channel, is positioned at the downstream of the restrictor and is used for silencing and discharging gas in the exhaust channel;
the head end of the exhaust channel is communicated with the air inlet channel, the tail end of the exhaust channel is communicated with the outside, and the plugging piece is detachably connected to the tail end of the exhaust channel.
2. The throttle muffler gas circuit structure according to claim 1, further comprising a pressure detecting member provided in the exhaust passage between the throttle body and the muffler.
3. The structure of claim 1, wherein the first sealing element is an annular tilting element arranged at the joint of the air inlet channel and the air outlet channel and used for forming a slope in the air flow channel; the second sealing element is an inclined platform arranged at the head end of the throttler, and the inclination of the inclined platform is matched with the inclined plane.
4. The structure of claim 1, wherein the tail end of the restrictor is provided with a straight groove or a cross groove for matching with an external screwdriver to rotate the restrictor.
5. The throttling silencing air passage structure according to claim 1, wherein the blocking piece is a plug, and the plug is in threaded connection or buckled connection with the tail end of the exhaust passage.
6. The throttling noise elimination gas circuit structure of claim 2, wherein the pressure detection piece is a pressure gauge.
7. The structure of claim 1, wherein the muffler is a resistive muffler, a reactive muffler or a resistive composite muffler.
8. An actuator comprising the throttle noise elimination air passage structure according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120534585.0U CN215763920U (en) | 2021-03-15 | 2021-03-15 | Throttling silencing gas circuit structure and actuating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120534585.0U CN215763920U (en) | 2021-03-15 | 2021-03-15 | Throttling silencing gas circuit structure and actuating mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215763920U true CN215763920U (en) | 2022-02-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120534585.0U Active CN215763920U (en) | 2021-03-15 | 2021-03-15 | Throttling silencing gas circuit structure and actuating mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215763920U (en) |
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2021
- 2021-03-15 CN CN202120534585.0U patent/CN215763920U/en active Active
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Address after: 310053 central control science and Technology Park (hi tech Zone), No. six, No. 309, Binjiang District Road, Zhejiang, Hangzhou Patentee after: Zhongkong Technology Co.,Ltd. Country or region after: China Patentee after: ZHEJIANG SUPCON INSTRUMENT CO.,LTD. Address before: 310053 central control science and Technology Park (hi tech Zone), No. six, No. 309, Binjiang District Road, Zhejiang, Hangzhou Patentee before: ZHEJIANG SUPCON TECHNOLOGY Co.,Ltd. Country or region before: China Patentee before: ZHEJIANG SUPCON INSTRUMENT CO.,LTD. |