Valve positioner

Abstract

The utility model belongs to the technical field of valve positioners, and particularly discloses a valve positioner which comprises a shell, and a control module is arranged in the shell. The IP unit is arranged in the shell and electrically connected with the control module, a working gas circuit is arranged on the IP unit, and the working gas circuit is used for the IP unit to receive or exhaust gas; and the vortex tube is arranged in the shell, the input end of the vortex tube is provided with a flow dividing gas circuit, the flow dividing gas circuit is communicated with the working gas circuit, the flow dividing gas circuit supplies gas to the vortex tube, the first output end of the vortex tube is provided with a heat conveying piece, and the heat conveying piece is located in the shell and used for heating the internal temperature of the shell. According to the valve positioner, the vortex tube is arranged, so that the interior of the valve positioner can be heated under the condition that an external heating device is not adopted, the valve positioner can work normally in a certain temperature state, and meanwhile, the safety performance of the valve positioner in the heating process is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of valve positioners, and particularly to a valve positioner. Background Art

[0002] A valve positioner is a device installed on a valve to adjust and control the valve position. It usually consists of an actuator, a positioner, and a related control system, and can automatically or manually adjust the valve position to achieve the control and regulation of fluid media. The valve positioner has precise positioning ability, can quickly respond to control signals and accurately adjust the valve position, which is beneficial to improving the stability and safety of the system.

[0003] Under extremely low temperature conditions, an external heating device is used in the prior art to heat the valve positioner. However, in a conventional environment, the valve positioner is entirely in the medium. If an external heating device is used for heating, factors such as the current in the heating device are likely to cause safety accidents such as on-site fires and explosions. At the same time, the requirements for the on-site installation environment are also more stringent. Summary of the Utility Model

[0004] In view of the above-mentioned disadvantages of the prior art, one of the purposes of the present utility model is to provide a valve positioner to solve the problem that safety accidents are easily caused when an external heating device is used to heat the valve positioner in the prior art, and the second purpose is to provide a method for heating a valve positioner.

[0005] To achieve the above purposes and other related purposes, the present utility model provides a valve positioner, including:

[0006] A housing, in which a control module is provided;

[0007] An IP unit, arranged in the housing and electrically connected to the control module. A working air path is provided on the IP unit, and the working air path is used for the IP unit to receive or discharge gas;

[0008] An eddy current tube, arranged in the housing. A shunt air path is provided at the input end of the eddy current tube, and the shunt air path is communicated with the working air path. The shunt air path supplies gas to the eddy current tube. A heat transfer member is provided at the first output end of the eddy current tube, and the heat transfer member is located in the housing and is used to heat the internal temperature of the housing.

[0009] Optionally, a shunt air path is provided between the eddy current tube and the working air path. The shunt air path includes a control valve and a shunt pipe. The shunt pipe is arranged between the eddy current tube and the working air path, the control valve is arranged on the shunt pipe, and the control valve is electrically connected to the control module. The control module controls the flow-through and disconnection of the shunt pipe through the control valve.

[0010] Optionally, the working gas path includes an intake pipe and an exhaust pipe. The intake pipe is used to connect to an external gas source. The output end of the intake pipe penetrates into the housing and is connected to the input end of the IP unit. One end of the exhaust pipe is arranged at the output end of the IP unit, and the other end penetrates out of the housing.

[0011] Optionally, one end of the shunt pipe is arranged on the intake pipe, and the other end of the shunt pipe is connected to the input end of the vortex tube.

[0012] Optionally, the control module includes a control circuit board and a main board. The IP unit is electrically connected to the main board and is used for the IP unit to access and discharge gas. The control valve is electrically connected to the main board.

[0013] Optionally, a temperature sensor is further included. The temperature sensor is arranged inside the housing and is electrically connected to the control module. The temperature sensor is used to sense the temperature inside the housing.

[0014] Optionally, a signal input end is further included. It is arranged on the housing and is electrically connected to the control module for the control module to receive control signals.

[0015] Optionally, the heat transfer member is a coiled pipe. The coiled pipe is a serpentine flow path. The heat transfer member is arranged corresponding to the control module and the IP unit. The free end of the coiled pipe penetrates out of the housing.

[0016] Optionally, the vortex tube has a second output end. A cold discharge pipe is arranged at the second output end, and the output end of the cold discharge pipe penetrates out of the housing.

[0017] Optionally, the control valve adopts an electromagnetic valve, and the electromagnetic valve is electrically connected to the control module.

[0018] As described above, a valve positioner proposed by the present utility model has the following beneficial effects:

[0019] (1) Compared with the prior art, by arranging a vortex tube and a shunt pipeline inside the housing, the present utility model can, when the valve positioner is working normally, draw part of the gas from the current intake pipeline into the vortex tube, separate cold and hot gases through the characteristics of the vortex tube, and heat the inside of the housing with the hot gas through the heat transfer member, so that the inside of the housing is maintained at the normal working ambient temperature, ensuring the normal operation of the valve positioner while guaranteeing the safety performance during the heating process.

[0020] (2) Compared with the prior art, the utility model heats the interior of the housing by means of the vortex tube provided, and utilizes the characteristics of the vortex tube itself, without the access of electrical appliances such as current. While the temperature is rising, the occurrence of safety accidents is avoided, ensuring the personal safety of on-site staff. Description of the Drawings

[0021] Figure 1 It shows a schematic structural diagram of an embodiment of the utility model.

[0022] Description of the reference numerals in the drawings:

[0023] Housing 1, signal input terminal 2, circuit board 3, main board 4, temperature sensor 5, IP unit 6, intake pipe 7, outlet pipe 8, vortex tube 9, shunt pipe 10, control valve 11, heat transfer member 12, cold discharge pipe 13. Detailed Embodiment

[0024] The following uses specific specific examples to illustrate the implementation manners of the utility model. Those skilled in the art can easily understand other advantages and effects of the utility model from the content disclosed in this specification. The utility model can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the utility model.

[0025] It should be noted that the drawings provided in this embodiment only illustrate the basic concept of the utility model in a schematic manner. Therefore, only the components related to the utility model are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex. The structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limiting conditions under which the utility model can be implemented. Therefore, they do not have technical essential significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the utility model can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the scope under which the utility model can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope within which the utility model can be implemented.

[0026] As Figure 1 shown, the utility model proposes a valve positioner.

[0027] In an exemplary embodiment, the valve positioner includes:

[0028] A housing 1, within which a control module is provided;

[0029] An IP unit 6, disposed within the housing 1 and electrically connected to the control module. The IP unit 6 is provided with a working gas path for receiving or discharging gas by the IP unit 6.

[0030] A vortex tube 9, disposed within the housing 1. A shunt gas path is provided at the input end of the vortex tube 9. The shunt gas path is in communication with the working gas path and supplies gas to the vortex tube 9. A heat transfer member 12 is provided at the first output end of the vortex tube 9. The heat transfer member 12 is located within the housing 1 and is used to heat the internal temperature of the housing 1.

[0031] In this embodiment, through the vortex tube 9 and the shunt tube 10 disposed within the housing 1, when the valve positioner is operating normally, a portion of the gas can be drawn from the current intake pipe 7 and introduced into the vortex tube 9. Cold and hot gases are separated through the characteristics of the vortex tube 9, and the hot gas heats the interior of the housing 1 through the heat transfer member 12, enabling the interior of the housing 1 to be maintained at the normal operating ambient temperature, ensuring the normal operation of the valve positioner while guaranteeing the safety performance during the heating process.

[0032] Meanwhile, in this embodiment, by providing the vortex tube 9, the interior of the housing 1 is heated using the characteristics of the vortex tube 9 itself. There is no need to connect electrical appliances such as current, avoiding the occurrence of safety accidents during the temperature rise and ensuring the personal safety of on-site staff.

[0033] It should be noted that in this embodiment, the working gas path is the normal working circuit of the valve positioner. In this embodiment, the vortex tube 9 is indirectly connected to the working gas path through the shunt tube 10, enabling the gas in the working gas path to enter the vortex tube 9 to achieve the corresponding functions. Therefore, the valve positioner in this embodiment does not require additional heating components or an additional power supply, and can be achieved only relying on the on-site environment.

[0034] It should also be noted that in this embodiment, the principle of the vortex tube 9 is that compressed air is input into the vortex tube 9 and flows in a high-speed rotating manner towards one side. During the movement of this air flow, the outer air will heat up. On the contrary, the inner air will become cold. Therefore, in this embodiment, the cold air is directly discharged, and the hot air heats the interior of the housing 1 through the heat transfer member 12 to increase the internal temperature of the housing 1.

[0035] In an exemplary embodiment, the shunt gas path includes a control valve 11 and a shunt tube 10. The shunt tube 10 is disposed between the vortex tube 9 and the working gas path. The control valve 11 is disposed on the shunt tube 10. The control valve 11 is electrically connected to the control module, and the control module controls the flow and disconnection of the shunt tube 10 through the control valve 11.

[0036] In this embodiment, the control valve 11 is provided to enable the control module in this embodiment to control the on / off of the shunt gas path, and further control the operation of the vortex tube 9. When the ambient temperature is lower than the set threshold, the control module opens the control valve 11 to allow the gas in the shunt gas path to enter the vortex tube 9. The vortex tube 9 generates hot gas to heat the inside of the housing 1 until it reaches or exceeds the set threshold, and then the heating stops.

[0037] Exemplarily, the control valve 11 in this embodiment is an electromagnetic valve.

[0038] Exemplarily, one end of the shunt pipe 10 in this embodiment is arranged on the intake pipe 7, and the other end of the shunt pipe 10 is connected to the input end of the vortex tube 9 to achieve the function of diverting the gas from the intake pipe 7.

[0039] Exemplarily, in this embodiment, the vortex tube 9 has a second output end, and a cold discharge pipe 13 is provided at the second output end. The output end of the cold discharge pipe 13 penetrates through the housing 1, so that the cold air generated by the vortex tube 9 can be discharged from the housing 1 through the cold discharge pipe 13 provided on the vortex tube 9.

[0040] It should be noted that other control valves 11 with control functions and capable of realizing the opening and closing of pipelines can also be used.

[0041] In an exemplary embodiment, the working gas path includes an intake pipe 7 and an outlet pipe 8. The intake pipe 7 is used to connect to an external gas source. The output end of the intake pipe 7 penetrates into the housing 1 and is connected to the input end of the IP unit 6. One end of the outlet pipe 8 is arranged at the output end of the IP unit 6, and the other end penetrates through the housing 1 and is arranged outside.

[0042] In this embodiment, the intake pipe 7 and the outlet pipe 8 are used for the intake and outlet of the IP unit 6, and can provide the gas required for the normal operation of the IP unit 6 and discharge the gas to realize the normal operation of the valve positioner. In this embodiment, through holes for connecting the intake pipe 7 and the outlet pipe 8 are correspondingly opened on the housing 1, and sealing treatment is performed at the through holes, such as using a sealing ring, to prevent the internal space of the housing 1 from being directly communicated with the external environment.

[0043] In an exemplary embodiment, the control module includes a control circuit board 3 and a main board 4. The IP unit 6 is electrically connected to the main board 4 for the IP unit 6 to access and discharge gas, and the control valve 11 is electrically connected to the main board 4.

[0044] In this embodiment, the control module in this embodiment is in the form of a circuit board 3 and a main board 4 to achieve the control function. In a specific application environment, the main board 4 is electrically connected to the IP unit 6 and the control valve 11 respectively for the normal operation of the control valve 11 and the valve heating.

[0045] Exemplarily, the main board 4 in this embodiment adopts a central processing unit (CPU) to control each component.

[0046] Exemplarily, it further includes a temperature sensor 5. The temperature sensor 5 is arranged inside the housing 1 and is electrically connected to the control module. The temperature sensor 5 is used to sense the temperature inside the housing 1. The provided temperature sensor 5 is used to sense the temperature inside the housing 1 and feedback it to the main board 4 to adjust the opening and closing of the control valve 11.

[0047] It is worth noting that a signal input terminal 2 is further provided on the housing 1 in this embodiment. The signal input terminal 2 is arranged on the housing 1 and is electrically connected to the control module, and is used to supply power to the control module to receive control signals.

[0048] In an exemplary embodiment, the heat transfer member 12 is a coiled pipe. The coiled pipe is a serpentine flow channel. The heat transfer member 12 is arranged corresponding to the control module and the IP unit 6. The free end of the coiled pipe passes through the housing 1 and is arranged outside.

[0049] In this embodiment, by adopting the heat transfer member 12 in the form of a coiled pipe, heat can be transferred to various positions inside the housing 1. When specifically arranged, the form as Figure 1 is used to extend the direction of the coiled pipe. Adopting the serpentine flow channel can increase the area of the coiled pipe inside the housing 1, thereby improving the heating effect, enabling the inside of the housing 1 to quickly reach above the target temperature to ensure the normal operation of the valve positioner.

[0050] The heating method of the valve positioner in the present utility model comprises the following steps:

[0051] Set a temperature threshold. When the temperature inside the housing 1 is higher than the threshold, it is the normal operating temperature. When the temperature inside the housing 1 is lower than the threshold, heating is carried out;

[0052] The temperature sensor 5 senses the temperature inside the housing 1. When the temperature inside the housing 1 is lower than the threshold, the main board 4 in the control module opens the shunt pipe 10 through the control valve 11;

[0053] The shunt pipe 10 introduces part of the high-pressure gas in the inlet pipe 7 into the vortex tube 9, and cold air and hot air are generated through the vortex tube 9;

[0054] The cold air moves inside the housing 1 through the heat transfer member 12, heats the housing 1 and finally passes through the housing 1 and is discharged;

[0055] When the temperature sensor 5 senses that the temperature inside the housing 1 is greater than the set temperature threshold, the main board 4 controls the control valve 11 to close the shunt pipe 10 to stop heating, and the valve positioner operates normally.

[0056] In summary, through the vortex tube 9 provided by the present utility model, the interior of the valve positioner can be heated without using an external heating device, enabling the valve positioner to maintain a certain temperature state for normal operation, while ensuring the safety performance of the valve positioner during the heating process.

[0057] The above embodiments are only illustrative of the principles and effects of the present utility model, rather than limiting the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. A valve positioner, characterized in that: include: A housing, wherein a control module is disposed in the housing; An IP unit is disposed in the housing and is electrically connected to the control module. The IP unit is provided with a working gas circuit, and the working gas circuit is used for the IP unit to receive or discharge gas; A vortex tube is arranged in the shell. A heat transport component is provided at a first output end of the vortex tube. The heat transport component is located in the shell and is used to heat the internal temperature of the shell.

2. The valve positioner according to claim 1, characterized in that: A shunt gas path is provided between the vortex tube and the working gas path, and the shunt gas path includes a control valve and a shunt tube. The shunt tube is provided between the vortex tube and the working gas path, and the control valve is provided on the shunt tube. The control valve is electrically connected to the control module, and the control module controls the flow and disconnection of the shunt tube through the control valve.

3. The valve positioner according to claim 2, characterized in that: The working gas circuit includes an air inlet pipe and an air outlet pipe. The air inlet pipe is used to connect to an external air source. The output end of the air inlet pipe passes through the shell and is connected to the input end of the IP unit. One end of the air outlet pipe is arranged at the output end of the IP unit, and the other end passes through the shell.

4. The valve positioner according to claim 3, characterized in that: One end of the shunt pipe is arranged on the air inlet pipe, and the other end of the shunt pipe is connected to the input end of the vortex tube.

5. The valve positioner according to claim 4, characterized in that: The control module includes a control circuit board and a main board. The IP unit is electrically connected to the main board for the IP unit to receive gas and exhaust gas. The control valve is electrically connected to the main board.

6. The valve positioner according to claim 1, characterized in that: It also includes a temperature sensor, which is arranged in the shell and electrically connected to the control module. The temperature sensor is used to sense the temperature in the shell.

7. The valve positioner according to claim 4, characterized in that: It also includes a signal input terminal, which is arranged on the shell, and the signal input terminal is electrically connected to the control module, and is used for the control module to receive a control signal.

8. The valve positioner according to claim 1, characterized in that: The heat transport component is a coil, and the coil is a serpentine flow channel. The heat transport component is arranged corresponding to the control module and the IP unit, and the free end of the coil passes through the shell.

9. The valve positioner according to claim 1, characterized in that: The vortex tube has a second output end, and the second output end is provided with a cooling tube, and the output end of the cooling tube passes through the shell.

10. The valve positioner according to claim 2, characterized in that: The control valve is a solenoid valve, and the solenoid valve is electrically connected to the control module.

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