CN217951402U - Boiler regulating valve system and boiler heating system - Google Patents
Boiler regulating valve system and boiler heating system Download PDFInfo
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- CN217951402U CN217951402U CN202221945572.3U CN202221945572U CN217951402U CN 217951402 U CN217951402 U CN 217951402U CN 202221945572 U CN202221945572 U CN 202221945572U CN 217951402 U CN217951402 U CN 217951402U
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Abstract
The utility model relates to a boiler governing valve system and boiler heating system includes: a gas source; the pneumatic actuating mechanism is connected with an air source; the valve plate is arranged in the valve body and used for controlling the valve body to open and close, and the valve plate is connected with an execution part of the pneumatic execution mechanism; and the protection mechanism is arranged between the air source and the pneumatic actuating mechanism and used for controlling the pneumatic actuating mechanism to act when necessary so as to enable the valve plate to move to close the valve body. The air source drives the pneumatic actuating mechanism to act so as to drive the valve plate to move to control the opening and closing degree of the valve body, the protection mechanism is arranged between the air source and the pneumatic actuating mechanism, and when necessary, for example, abnormal conditions such as power failure of the protection mechanism or air failure of the pneumatic actuating mechanism and the like, the protection mechanism controls the pneumatic actuating mechanism to act to close the valve body, so that the damage to equipment is avoided.
Description
Technical Field
The disclosure relates to the technical field of control valves, in particular to a boiler regulating valve system and a boiler heating system.
Background
The regulating valve between the steam-water separator and the deaerator in the boiler heating system is very important, is frequently used in the starting process of the boiler and is used for assisting in regulating the water level of the steam-water separator and recovering the heat energy of the hydrophobic working medium, and the regulating valve in the past can not be quickly closed under the abnormal conditions of gas cut-off, power failure and the like, so that the system can be damaged, and the system is not safe and reliable enough in operation.
SUMMERY OF THE UTILITY MODEL
An object of the present disclosure is to provide a boiler regulating valve system and a boiler heating system, which can solve the above-mentioned problems.
In order to achieve the above object, the present disclosure provides a boiler regulating valve system, comprising: a gas source; the pneumatic actuating mechanism is connected with the air source; the valve plate is connected with the execution part of the pneumatic execution mechanism; and the protection mechanism is arranged between the air source and the pneumatic actuating mechanism and used for controlling the pneumatic actuating mechanism to act when necessary so as to enable the valve plate to move to close the valve body.
Optionally, the pneumatic actuator is configured as a piston cylinder, the piston cylinder includes a cylinder body, a piston disposed in the cylinder body, and a piston rod connected to the piston, one end of the piston rod extends out of the cylinder body to be connected to the valve plate, and a rod chamber and a rod-free chamber of the piston cylinder are selectively communicated with the air source through the protection mechanism, respectively.
Optionally, the protection mechanism includes a standby air source and a controllable stop valve, an air inlet valve port of the controllable stop valve is communicated with the air source and includes a first working valve port and a second working valve port respectively communicated with the air inlet valve port, the rod chamber is communicated with the first working valve port through a first direction valve, the rodless chamber is communicated with the second working valve port through a second direction valve, a third direction valve is disposed between the rodless chamber and the second direction valve, the second direction valve is further communicated with the standby air source, the first direction valve further has a first exhaust valve port, and the third direction valve further has a second exhaust valve port.
Optionally, a pressure sensor is arranged at an air inlet of the controllable stop valve, and the first reversing valve, the second reversing valve, the third reversing valve and the pressure sensor are all electrically connected with a control device.
Optionally, the backup gas source is configured as a gas cylinder, and the first directional valve, the second directional valve, and the third directional valve are all configured as electromagnetic two-position three-way directional valves.
Optionally, the boiler regulating valve system further comprises a positioner arranged on the piston rod and a feedback device for detecting the position of the positioner, so as to control the opening and closing degree of the valve body.
Optionally, the boiler regulating valve system further includes two amplifiers, the two amplifiers are respectively disposed at the air ports of the rodless chamber and the rod chamber, and both the two amplifiers are connected to the positioner.
Optionally, the boiler regulating valve system further includes a control device and a backup air source, the positioner is configured as an electric valve positioner, a signal input end of the positioner is electrically connected with the control device to input an electric signal, a signal output end of the positioner is connected with the amplifier to output an air signal, an air supply port is arranged on the electric valve positioner, the air supply port is communicated with the air source and the backup air source, a one-way valve is arranged between the air supply port and the air supply port, a control valve is arranged between an air outlet end of the backup air source and the air supply port, the control valve is electrically connected with the control device, and the feedback device is electrically connected with the control device.
Optionally, a filtering pressure reducing valve is arranged on the air outlet end of the air source.
The utility model also provides a boiler heating system, including foretell boiler governing valve system, catch water and oxygen-eliminating device, boiler governing valve system sets up catch water extremely be used for the supplementary regulation between the oxygen-eliminating device catch water level with supplementary heat energy of retrieving hydrophobic working medium.
Through above-mentioned technical scheme, the air supply drives the action of pneumatic actuator to drive the valve plate motion in order to control the degree of opening and shutting of valve body, be equipped with protection mechanism between air supply and the pneumatic actuator, when needs, for example protection mechanism outage or the pneumatic actuator unusual circumstances such as outage, protection mechanism control pneumatic actuator moves and closes the valve body, avoids causing the damage of equipment.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a schematic block diagram of a boiler regulating valve system according to the present disclosure;
FIG. 2 is a system connection diagram of a boiler regulating valve system according to the present disclosure.
Description of the reference numerals
1. A pneumatic actuator; 2. a piston; 3. a rodless cavity; 4. a rod cavity; 5. a protection mechanism; 51. a controllable stop valve; 511. an intake valve port; 512. a second working valve port; 513. a first working valve port; 52. a standby air source; 6. a piston rod; 7. a valve plate; 8. a valve body; 9. a positioner; 10. a feedback device; 11. a one-way valve; 12. a pressure sensor; 13. a first direction changing valve; 14. a second directional control valve; 15. a filtering pressure reducing valve; 16. a gas source; 17. a first exhaust valve port; 18. a control valve; 19. a control device; 20. an air supply port; 21. an amplifier; 22. a third directional control valve; 221. a second exhaust valve port.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
In the present disclosure, unless otherwise specified, use of directional words such as "upper and lower" generally refer to the orientation of fig. 1, i.e., the direction of gravity, "inner and outer" refer to inner and outer relative to the contour of the component or structure itself. In addition, it should be noted that terms such as "first, second, third, etc. are used to distinguish one element from another, and have no order or importance. In addition, in the description with reference to the drawings, the same reference numerals in different drawings denote the same elements.
As shown in fig. 1-2, the present disclosure provides a boiler regulating valve system, comprising: a gas source 16, which may be a gas pump or other gas supply device; the pneumatic actuating mechanism 1 is connected with an air source 16; the valve body 8 is internally provided with a valve plate 7 for controlling the valve body 8 to open and close, and the valve plate 7 is connected with an execution part of the pneumatic execution mechanism 1; and the protection mechanism 5 is arranged between the air source 16 and the pneumatic actuator 1 and is used for controlling the pneumatic actuator 1 to act to move the valve plate 7 to close the valve body 8 when needed.
Through the technical scheme, the air source 16 drives the pneumatic actuating mechanism 1 to act, so that the valve plate 7 is driven to move to control the opening and closing degree of the valve body 8, the effect of the regulating valve is achieved, the protection mechanism 5 is arranged between the air source 16 and the pneumatic actuating mechanism 1, when needed, for example, the protection mechanism 5 is powered off or the pneumatic actuating mechanism 1 is powered off, and the protection mechanism 5 controls the pneumatic actuating mechanism 1 to act to close the valve body 8, and the damage to equipment is avoided.
As an alternative embodiment, as shown in fig. 1, the pneumatic actuator 1 is configured as a piston cylinder, the piston cylinder may be a double-acting cylinder, that is, a cylinder capable of applying force on two surfaces of the piston 2 to control the active movement thereof, and a cylinder capable of acting in two directions and outputting greater thrust, the piston cylinder includes a cylinder body, a piston 2 disposed in the cylinder body, and a piston rod 6 connected to the piston 2, one end of the piston rod 6 extends out of the cylinder body to be connected to a valve plate 7, a rod chamber 4 and a rod-less chamber 3 of the piston cylinder are selectively communicated with a gas source 16 through a protection mechanism 5, that is, the gas source 16 is communicated with the rod chamber 4 or the rod-less chamber 3, and is selectively communicated with the rod chamber 4, the rod chamber 4 is a chamber having the piston rod 6, one end of the piston rod 6 is connected to the piston 2, and the other end extends out of the cylinder body to be connected to the valve plate 7, the rod-less chamber 3 is a chamber without the piston rod 6, the rod chamber 4 is a chamber 4 and the rod chamber 3 is disposed on two sides of the piston 2, the rod chamber 3 is exhausted when the rod chamber 4 is exhausted, and the rod-less chamber 3 is exhausted when the rod chamber is exhausted.
Alternatively, the protection mechanism 5 comprises a standby air supply 52 and a controllable stop valve 51, an air inlet port 511 of the controllable stop valve 51 is communicated with the air supply 16 and comprises a first working port 513 and a second working port 512 which are respectively communicated with the air inlet port 511, the rod chamber 4 is communicated with the first working port 513 through a first direction change valve 13, the rodless chamber 3 is communicated with the second working port 512 through a second direction change valve 14, a third direction change valve 22 is arranged between the rodless chamber 3 and the second direction change valve 14, the second direction change valve 14 is also communicated with the standby air supply 52, the first direction change valve 13 is also provided with a first air exhaust port 17, and the third direction change valve 22 is also provided with a second air exhaust port 221. Under normal operation, the air source 16 is selectively communicated with the first reversing valve 13 or the second reversing valve 14 to adjust the position of the valve plate 7, the first reversing valve 13 is electrified, the second reversing valve 14 is powered off, the air source 16 enables the rod cavity 4 to intake air through the first reversing valve 13, the third reversing valve 22 is electrified, the rodless cavity 3 exhausts air through the second exhaust valve port 221 of the third reversing valve 22, and simultaneously, the air source 16 and the standby air source 52 are both disconnected from the rodless cavity 3 to enable the valve plate 7 to move upwards, so that the valve body 8 is opened and closed to be larger; the first reversing valve 13 is powered off, the second reversing valve 14 is powered on, the third reversing valve 22 is powered off, the air source 16 enables the rodless cavity 3 to be filled with air through the second reversing valve 14, the rod cavity 4 is exhausted through the first exhaust valve port 17 of the first reversing valve 13, the valve plate 7 moves downwards, and the valve body 8 is opened and closed to be small. When special conditions are met, for example, when the air source 16 is cut off, the first reversing valve 13, the second reversing valve 14 and the third reversing valve 22 are all powered off, the standby air source 52 supplies air to the rodless cavity 3, air in the rod cavity 4 is discharged through the first exhaust valve port 17, the valve plate 7 moves downwards to close the valve body 8, the damage to equipment caused by the failure of the regulating valve is avoided, when the protection mechanism 5 is powered off, the first reversing valve 13, the second reversing valve 14 and the third reversing valve 22 are all powered off, and the movement mode of the valve plate 7 is the same as that of the valve plate.
Optionally, a pressure sensor 12 is disposed at the air inlet valve port 511 of the controllable stop valve 51, the first direction valve 13, the second direction valve 14, the third direction valve 22 and the pressure sensor 12 are all electrically connected to the control device 19, the control device 19 may be a single chip microcomputer or a DCS control system, the backup air source 52 may be any air storage device, for example, in the present disclosure, the backup air source 52 is configured as an air storage bottle, and the first direction valve 13, the second direction valve 14 and the third direction valve 22 are configured as an electromagnetic two-position three-way direction valve. The pressure sensor 12 is used for detecting the intake pressure from the intake valve port 511, when the intake pressure is zero, the air source 16 is cut off, the pressure sensor 12 transmits a signal to the control device 19, and the control device 19 controls the first reversing valve 13, the second reversing valve 14 and the third reversing valve 22 to move; when the first reversing valve 13 is powered on, the air source 16 is communicated with the rod cavity 4 through the first reversing valve 13, the first exhaust valve port 17 is closed, when the power is off, the rod cavity 4 is communicated with the first exhaust valve port 17, and the first reversing valve 13 is disconnected with the air source 16; when the second reversing valve 14 is powered on, the air source 16 is communicated with the rodless cavity 3 through the second reversing valve 14, the second reversing valve 14 is disconnected with the standby air source 52, when the power is off, the second reversing valve 14 is disconnected with the air source 16, and the standby air source 52 is communicated with the rodless cavity 3 through the second reversing valve 14; when the third direction valve 22 is powered on, the rodless cavity 3 is communicated with the second exhaust valve port 221, the third direction valve 22 disconnects the rodless cavity 3 from the second direction valve 14 and the air source 16, when the power is off, the second exhaust valve port 221 is closed, and the rodless cavity 3 is communicated with the second direction valve 14.
As an alternative embodiment, as shown in fig. 1-2, the boiler regulating valve system further includes a positioner 9 disposed on the piston rod 6 and a feedback device 10 for detecting a position of the positioner 9 to control the opening and closing degree of the valve body 8, the positioner 9 is disposed on the piston rod 6, and the feedback device 10 can detect a position of the positioner 9, that is, can detect a position of the piston rod 6 to position the valve plate 7, so as to control the opening and closing degree of the valve body 8.
Optionally, the boiler regulating valve system further comprises two amplifiers 21, the two amplifiers 21 are respectively arranged at the air ports of the rodless chamber 3 and the rod chamber 4, the two amplifiers 21 are both connected with the positioner 9, and the amplifiers 21 are a device for receiving the output pressure of the positioner 9 arranged on the pneumatic control valve 18, supplying the same pressure to the actuator and outputting a large-flow air source to the actuator to accelerate the action speed of the regulating valve. When the valve body 8 is controlled to be opened and closed only by the positioner 9, the valve plate 7 slowly acts and cannot meet the operation requirement, and the amplifier 21 is added to amplify the compressed air quantity of the cylinder so as to achieve the purpose of improving the action speed of the valve plate 7. The rod cavity 4 and the rodless cavity 3 are respectively provided with an amplifier 21, when the device works normally, the positioner 9 controls the air path slide block of the amplifier 21 through weak air flow, and the slide block controls the size of the air flow passing through the amplifier 21, so that the aim of controlling strong air through weak air is fulfilled.
Optionally, the boiler regulating valve system further includes a control device 19 and a backup air source 52, the positioner 9 is configured as an electric valve positioner, an input signal of the electric valve positioner is a standard current or voltage signal, for example, a 4-20 mA current signal or a 1-5V voltage signal, and the like, an electric signal is converted into an electromagnetic force inside the electric valve positioner, and then an air signal is output to the amplifier 21, a signal input end of the electric valve positioner is electrically connected with the control device 19 to input the electric signal, a signal output end of the electric valve positioner is connected with the amplifier 21 to output the air signal, an air supply port 20 is provided on the electric valve positioner, the air supply port 20 is communicated with the air source 16 and the backup air source 52 for inputting an air flow for controlling the amplifier 21 to the positioner 9, a check valve 11 is provided between the air source 16 and the air supply port 20 to prevent the air from flowing to the air source 16 when the backup air source 52 supplies air to the amplifier 21, an air supply control valve 18 is provided between the air supply port 20 of the backup air source 52, under normal conditions, when the air source 16 is disconnected, the air source control valve 18 is opened, the backup air supply 52 is connected with the control device 18 and the control device 19, the electromagnetic valve positioner 9 detects a feedback signal of the electromagnetic valve positioner 9, and sends a feedback sensing device 10 to detect a feedback position of the electromagnetic induction device 9.
As an alternative embodiment, as shown in FIG. 1, a filtering pressure-reducing valve 15 is provided at the outlet end of the gas source 16 to make the gas supply safer and more stable.
The boiler heating system comprises the boiler regulating valve system, the steam-water separator and the deaerator, wherein the boiler regulating valve system is arranged between the steam-water separator and the deaerator and used for assisting in regulating the water level of the steam-water separator and assisting in recovering heat energy of a hydrophobic working medium, and the regulating valve system is used for regulating the outflow speed of water in the steam-water separator so as to assist in regulating the water level of the steam-water separator; the oxygen-eliminating device is used for retrieving the heat energy of hydrophobic working medium, this governing valve system can not drop into because of the trouble when the boiler starts, be unfavorable for catch water level control, extension unit start-up process, hydrophobic working medium just so can not in time enter into the oxygen-eliminating device, can waste a large amount of heat energy of hydrophobic working medium, so governing valve system can assist the heat energy of retrieving hydrophobic working medium, the water delivery means that the steam that various steam conduit and steam consuming equipment apparent contact angle CA are greater than when ninety degrees condenses the water that forms, the working medium is the media material who realizes heat energy and mechanical energy interconversion, hydrophobic working medium realizes that the media material of heat energy and mechanical energy interconversion promptly is hydrophobic.
In actual use, under normal operation, the air source 16 is selectively communicated with the first reversing valve 13 or the second reversing valve 14 to adjust the position of the valve plate 7, the first reversing valve 13 is electrified, the second reversing valve 14 is powered off, the air source 16 enables the rod cavity 4 to intake air through the first reversing valve 13, the third reversing valve 22 is electrified, the rodless cavity 3 exhausts air through the second exhaust valve port 221 of the third reversing valve 22, and simultaneously the air source 16 and the standby air source 52 are both disconnected from the rodless cavity 3 to enable the valve plate 7 to move upwards, and the valve body 8 is opened and closed to be enlarged; the first reversing valve 13 is powered off, the second reversing valve 14 is powered on, the third reversing valve 22 is powered off, the air source 16 enables the rodless cavity 3 to be filled with air through the second reversing valve 14, the rod cavity 4 is exhausted through the first exhaust valve port 17 of the first reversing valve 13, the valve plate 7 moves downwards, and the valve body 8 is opened and closed to be small. When special conditions are met, for example, when the air source 16 is cut off, the first reversing valve 13, the second reversing valve 14 and the third reversing valve 22 are all powered off, the standby air source 52 supplies air to the rodless cavity 3, air in the rod cavity 4 is discharged through the first exhaust valve port 17, the valve plate 7 moves downwards to close the valve body 8, the damage to equipment caused by the failure of the regulating valve is avoided, when the protection mechanism 5 is powered off, the first reversing valve 13, the second reversing valve 14 and the third reversing valve 22 are all powered off, and the movement mode of the valve plate 7 is the same as that of the valve plate.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure as long as it does not depart from the gist of the present disclosure.
Claims (10)
1. A boiler regulating valve system, comprising:
a gas source;
the pneumatic actuating mechanism is connected with the air source;
the valve plate is connected with the execution part of the pneumatic execution mechanism;
and the protection mechanism is arranged between the air source and the pneumatic actuating mechanism and used for controlling the pneumatic actuating mechanism to act when necessary so as to enable the valve plate to move to close the valve body.
2. The boiler regulating valve system of claim 1, wherein said pneumatic actuator is configured as a piston cylinder including a cylinder body, a piston disposed within said cylinder body, and a piston rod connected to said piston, one end of said piston rod extending outside of said cylinder body to be connected to said valve plate, said piston cylinder having rod and rodless chambers selectively communicating with said gas source through said protection mechanism, respectively.
3. The boiler regulating valve system according to claim 2, characterized in that the protection mechanism comprises a backup gas source and a controllable stop valve, an inlet valve port of the controllable stop valve being in communication with the gas source and comprising a first working valve port and a second working valve port in communication with the inlet valve port, respectively, the rod chamber being in communication with the first working valve port through a first diverter valve, the rodless chamber being in communication with the second working valve port through a second diverter valve, a third diverter valve being provided between the rodless chamber and the second diverter valve, the second diverter valve being further in communication with the backup gas source, the first diverter valve further having a first exhaust valve port, the third diverter valve further having a second exhaust valve port.
4. The boiler regulating valve system of claim 3, wherein a pressure sensor is provided at an air inlet port of the controllable stop valve, and the first direction valve, the second direction valve, the third direction valve and the pressure sensor are electrically connected to a control device.
5. The boiler regulating valve system of claim 3 or 4, characterized in that the backup gas source is configured as a gas cylinder, and the first, second and third directional valves are each configured as an electromagnetic two-position three-way directional valve.
6. The boiler regulating valve system of claim 2, further comprising a positioner disposed on said piston rod and a feedback device for detecting a position of said positioner to control a degree of opening and closing of said valve body.
7. The boiler regulating valve system of claim 6, further comprising two amplifiers, two of said amplifiers being disposed at the gas ports of said rodless chamber and said rod chamber, respectively, both of said amplifiers being connected to said positioner.
8. The boiler regulating valve system according to claim 7, characterized in that the boiler regulating valve system further comprises a control device and a backup gas source, the positioner is configured as an electric valve positioner, a signal input end thereof is electrically connected with the control device to input an electric signal, a signal output end thereof is connected with the amplifier to output a gas signal, an air supply port is arranged on the electric valve positioner, the air supply port is communicated with both the gas source and the backup gas source, a one-way valve is arranged between the gas source and the air supply port, a control valve is arranged between an air supply end of the backup gas source and the air supply port, the control valve is electrically connected with the control device, and the feedback device is electrically connected with the control device.
9. The boiler regulating valve system of claim 1, wherein a filter relief valve is provided on an outlet end of said source of gas.
10. A boiler heating system, characterized by comprising the boiler regulating valve system according to any one of claims 1 to 9, a steam-water separator and a deaerator, wherein the boiler regulating valve system is arranged between the steam-water separator and the deaerator and is used for assisting in regulating the water level of the steam-water separator and recovering heat energy of a hydrophobic working medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221945572.3U CN217951402U (en) | 2022-07-26 | 2022-07-26 | Boiler regulating valve system and boiler heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221945572.3U CN217951402U (en) | 2022-07-26 | 2022-07-26 | Boiler regulating valve system and boiler heating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217951402U true CN217951402U (en) | 2022-12-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221945572.3U Active CN217951402U (en) | 2022-07-26 | 2022-07-26 | Boiler regulating valve system and boiler heating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217951402U (en) |
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2022
- 2022-07-26 CN CN202221945572.3U patent/CN217951402U/en active Active
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