CN217006010U - Temperature control system of flow standard device - Google Patents
Temperature control system of flow standard device Download PDFInfo
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- CN217006010U CN217006010U CN202122992095.8U CN202122992095U CN217006010U CN 217006010 U CN217006010 U CN 217006010U CN 202122992095 U CN202122992095 U CN 202122992095U CN 217006010 U CN217006010 U CN 217006010U
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Abstract
The utility model particularly relates to a temperature control system of a flow standard device, aiming at solving the problem that the existing flow standard device cannot measure the fluid condition in a measured instrument in a reasonable temperature range. For this purpose, the temperature control system provided by the utility model comprises a circulating flow path formed by sequentially communicating a cooling unit, a water storage tank set and a heat exchanger, wherein the heat exchanger is in thermal contact with a flow pipe of a flow standard device, and the temperature control system controls the temperature of the heat exchanger through the cooling unit and the water storage tank set and adjusts the temperature of the flow pipe through the heat exchanger. The temperature control system provided by the utility model can adjust the temperature of the fluid in the flow pipe of the flow standard device, so that the temperature of the fluid in the flow standard device can be accurately controlled, the temperature state of the measured instrument under the actual use condition is restored, and the related measurement data of the instrument under the temperature state is obtained, thereby enabling the flow standard device to obtain more accurate measurement data.
Description
Technical Field
The utility model relates to the technical field of flow measuring equipment, in particular to a temperature control system of a flow standard device.
Background
The current flow standard device for calibrating the instrument is divided into two forms on a pipeline: one in inline form; one is in the form of a loop.
In the form of the loop, because the fan is in the middle of the loop, the heat generated by the fan can cause temperature fluctuation in the loop, thereby influencing the accuracy of instrument testing. Therefore, the temperature of the fluid in the pipeline needs to be adjusted, and at present, there are two ways of a natural cooling method and a water bath method.
The instrument detection has higher requirements on the temperature stability and the temperature range of fluid flowing through the instrument, most of the prior loop type fluid flow standard devices adopt two modes of natural air cooling or natural water cooling for controlling the temperature, and the two modes can not accurately and quickly adjust the gas, so that the final stable temperature and time can not be controlled, and the requirements of customers on the instrument test can not be met.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving, at least to some extent, the above-mentioned technical problems in the related art.
Therefore, the utility model provides a temperature control system of a flow standard device, the temperature control system comprises a circulating flow path formed by sequentially communicating a cooling unit, a water storage tank group and a heat exchanger, the heat exchanger is in thermal contact with a flow pipe of the flow standard device, and the temperature control system controls the temperature of the heat exchanger through the cooling unit and the water storage tank group and adjusts the temperature of the flow pipe through the heat exchanger.
In addition, the temperature control system of the flow standard device according to the present invention may further have the following additional technical features:
according to one embodiment of the present invention, the circulation flow path includes a cooling pipe communicated from the cooling unit to the water storage tank group and the heat exchanger in this order, and a return pipe communicated from the heat exchanger to the water storage tank group and the cooling unit in this order.
According to one embodiment of the utility model, the cooling pipe comprises a first cooling pipe section located between the water storage tank group and the heat exchanger, the return pipe comprises a first return pipe section located between the water storage tank group and the heat exchanger, and a first communication pipe and a first control valve for controlling opening and closing of the first communication pipe are arranged between the first cooling pipe section and the first return pipe section.
According to one embodiment of the utility model, the water storage tank group comprises a first water storage tank and a second water storage tank which are connected in series, the first water storage tank is communicated with the cooling unit, and the second water storage tank is communicated with the heat exchanger.
According to an embodiment of the present invention, the cooling pipe includes a second cooling pipe section located between the first water storage tank and the second water storage tank, the return pipe includes a second return pipe section located between the first water storage tank and the second water storage tank, and a second communication pipe and a second control valve for controlling opening and closing of the second communication pipe are disposed between the second cooling pipe section and the second return pipe section.
According to an embodiment of the present invention, the temperature control system further includes a pump unit disposed in the circulation flow path, and the pump unit controls the refrigerant in the circulation flow path to circulate and communicate between the cooling pipe and the return pipe.
According to one embodiment of the utility model, the first control valve comprises a first three-way proportional valve arranged in the first cooling pipe section and communicating with the first communication pipe, and the pump group comprises a first one-way pump arranged in the first cooling pipe section and downstream of the first three-way proportional valve.
According to one embodiment of the utility model, the second control valve comprises a second three-way proportional valve arranged in the second cooling section and communicating with the second communication pipe, and the pump stack comprises a second one-way pump arranged in the second cooling section and downstream of the second three-way proportional valve.
According to one embodiment of the utility model, the temperature control system further comprises a temperature transmitter arranged in the circulation flow path, and the temperature control system controls the opening and closing of the first three-way proportional valve and the second three-way proportional valve according to the temperature of the refrigerant monitored by the temperature transmitter.
According to an embodiment of the present invention, the temperature control system further includes a surge tank provided in the circulation flow path, and the temperature control system stabilizes the fluid pressure of the circulation flow path by the surge tank.
The temperature control system provided by the utility model can adjust the temperature of the fluid in the flow pipe of the flow standard device, so that the temperature of the fluid in the flow standard device can be accurately controlled, the temperature state of the measured instrument under the actual use condition is restored, and the related measurement data of the instrument under the temperature state is obtained, thereby enabling the flow standard device to obtain more accurate measurement data.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a system diagram of a temperature control system of a flow calibration device in accordance with one embodiment of the present invention;
FIG. 2 is a system diagram of an intercooler unit and a first water storage tank of the temperature control system of FIG. 1;
FIG. 3 is a system diagram of a second water storage tank of the temperature control system of FIG. 1;
fig. 4 is a system configuration diagram of a heat exchanger in the temperature control system shown in fig. 1.
Wherein the reference numbers are as follows:
100. a temperature control system; 101. a cooling tube; 102. a return pipe; 103. a first cooling tube section; 104. a first return pipe section; 105. a first communication pipe; 106. a second cooling tube section; 107. a second return pipe section; 108. a second communicating pipe;
10. a cooling unit;
20. a water storage tank group; 21. a first water storage tank; 22. a second water storage tank;
30. a heat exchanger;
41. a first control valve; 42. a second control valve;
51. a first one-way pump; 52. a second one-way pump; 53. a reflux pump;
60. a surge tank;
70. a temperature transmitter;
81. a filter; 82. a flow switch; 83. a pressure gauge;
200. a flow tube.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that, the application of the temperature control system of the flow rate standard device to the calibration of the gas meter is only a preferred embodiment, and is not a limitation to the protection range of the temperature control system of the present invention.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof.
In the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first", "second", may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
For convenience of description, spatially relative terms, such as "end," "intermediate," "upper," "upstream," "inner," "outer," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. This spatially relative relationship is intended to encompass different orientations of the mechanism in use or operation in addition to the orientation depicted in the figures. For example, if the mechanism in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The mechanism may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
As shown in fig. 1 to 4, the present invention provides a temperature control system 100 of a flow rate calibration device, the temperature control system 100 includes a circulation flow path formed by a cooling unit 10, a water storage tank set 20, and a heat exchanger 30 sequentially connected, and the heat exchanger 30 is in thermal contact with a flow tube 200 of the flow rate calibration device, the temperature control system 100 controls the temperature of the heat exchanger 30 through the cooling unit 10 and the water storage tank set 20, and adjusts the temperature of the flow tube 200 through the heat exchanger 30.
The temperature control system 100 provided by the utility model can adjust the temperature of the fluid in the flow tube 200 of the flow standard device, so that the temperature of the fluid in the flow standard device can be accurately controlled, the temperature state of the measured instrument under the actual use condition is restored, and the related measurement data of the instrument under the temperature state is acquired, thereby enabling the flow standard device to obtain more accurate measurement data.
It should be noted that, in the embodiment of the present invention, the application ranges of the flow standard device and the temperature control system 100 are not limited, the flow standard device may be a gas flow standard device, or a liquid flow standard device, the flow standard device may be used for calibrating a gas meter, or may be used for calibrating a flow device such as a liquid flow meter, and the internal refrigerant of the temperature control system 100 may be set as gas or liquid, and such adjustments all belong to the protection range of the embodiment of the present invention.
For convenience of explaining the structure and technical effects of the flow rate standard device and the temperature control system 100, the flow rate standard device and the temperature control system 100 with the refrigerant set as water are explained in detail.
With continued reference to fig. 1-4, according to one embodiment of the present invention, the circulation flow path includes a cooling pipe 101 connected from the cooling unit 10 to the water storage tank group 20 and the heat exchanger 30 in sequence, and a return pipe 102 connected from the heat exchanger 30 to the water storage tank group 20 and the cooling unit 10 in sequence.
In this embodiment, the heat exchanger 30 may be selectively configured as a heat exchange shell and a heat exchange tube disposed inside the heat exchange shell, the heat exchange tube is disposed inside the heat exchange shell in a circuitous state, two ends of the heat exchange tube are respectively communicated with the cooling tube 101 and the return tube 102, the flow tube 200 of the flow standard device is circuitously disposed inside the heat exchange shell and is disposed closely to the heat exchange tube, a medium flowing out of the cooling unit 10 flows to the heat exchange tube through the cooling tube 101, and exchanges heat with the flow tube 200 of the flow standard device through the heat exchange tube, so as to achieve a purpose of adjusting a temperature of a fluid in the flow tube 200 of the flow standard device.
With continued reference to fig. 1-4, according to one embodiment of the present invention, the cooling pipe 101 includes a first cooling pipe segment 103 between the water storage tank set 20 and the heat exchanger 30, the return pipe 102 includes a first return pipe segment 104 between the water storage tank set 20 and the heat exchanger 30, and a first communication pipe 105 and a first control valve 41 controlling the opening and closing of the first communication pipe 105 are disposed between the first cooling pipe segment 103 and the first return pipe segment 104.
In this embodiment, by communicating the first cooling pipe section 103 with the first return pipe section 104, the temperature control system 100 can mix the high temperature medium in the first return pipe section 104 with the low temperature medium in the first cooling pipe section 103 to adjust the temperature of the flow tube 200 of the flow standard device, so as to achieve the purpose of accurately adjusting and controlling the temperature of the fluid in the flow tube 200 of the flow standard device.
In addition, the specific installation position and the specific type of the first control valve 41 are not limited in the embodiments of the present invention, because the first control valve 41 may be disposed on the first communication pipe 105, the first cooling pipe section 103 or the first return pipe section 104, and the first control valve 41 may be disposed as a solenoid valve, a one-way control valve, a three-way valve or a proportional valve, which all fall within the protection scope of the present invention.
Specifically, with continued reference to fig. 1-4, according to one embodiment of the present invention, the first control valve 41 includes a first three-way proportional valve disposed in the first cooling pipe segment 103 and in communication with the first communication pipe 105, and the pump set includes a first one-way pump 51 disposed in the first cooling pipe segment 103 and downstream of the first three-way proportional valve.
In this embodiment, the first one-way pump 51 mixes the hot water flowing from the heat exchanger 30 with the cold water flowing from the second water storage tank 22 and sends the mixed water back to the heat exchanger 30 through the first three-way proportional valve, so that the cooling water of the first cooling pipe section 103 can be prevented from flowing back to the first return pipe section 104 by the first one-way pump 51. At this time, the temperature control system 100 accurately controls the temperature of the heat exchanger 30 by monitoring the temperature requirement of the flow tube 200 of the flow standard device in real time and adjusting the opening of the first three-way proportional valve through PID control of the controller, so that the temperature fluctuation of the heat exchanger 30 does not exceed a set range, and the set range of the temperature fluctuation affects the calibration stability time of the instrument to be measured.
Specifically, the temperature in the heat exchanger 30 is accurately controlled by adjusting the opening degree of the first three-way proportional valve, so that the temperature fluctuation in the heat exchanger 30 does not exceed 0.5 degree.
With continued reference to fig. 1 to 4, according to an embodiment of the present invention, the water storage tank set 20 includes a first water storage tank 21 and a second water storage tank 22 connected in series, the first water storage tank 21 is communicated with the chiller unit 10, and the second water storage tank 22 is communicated with the heat exchanger 30.
In this embodiment, the temperature control system 100 not only can store enough refrigerants through the two water storage tanks, but also can mix the refrigerants in the two water storage tanks by using the temperature difference between the refrigerants in the two water storage tanks, so as to achieve the purpose of accurately adjusting the temperature of the refrigerant flowing into the heat exchanger 30.
Specifically, according to an embodiment of the present invention, the cooling pipe 101 includes a second cooling pipe section 106 located between the first water storage tank 21 and the second water storage tank 22, the return pipe 104 includes a second return pipe section 107 located between the first water storage tank 21 and the second water storage tank 22, a second communication pipe 108 is disposed between the second cooling pipe section 106 and the second return pipe section 107, and the second control valve 42 is disposed to control opening and closing of the second communication pipe 108.
In this embodiment, the chiller unit 10 delivers cooling water to the first water storage tank 21 through the cooling pipe 101, and delivers return water, which has undergone heat exchange in the first water storage tank 21, to the chiller unit 10 through the return pipe 102, and the temperature control system 100 monitors the temperature of the inlet and outlet water of the chiller unit 10 and adjusts the operating power of the chiller unit 10 to reach the required water temperature.
In addition, the specific installation position and the specific type of the second control valve 42 are not limited in the embodiments of the present invention, because the second control valve 42 may be disposed on the second communication pipe 108, the second cooling pipe section 106 or the second return pipe section 107, and the second control valve 42 may be disposed as a solenoid valve, a one-way control valve, a three-way valve or a proportional valve, which all fall within the protection scope of the present invention.
Specifically, with continued reference to fig. 1-4, according to one embodiment of the present invention, the second control valve 42 includes a second three-way proportional valve disposed in the second cooling tube section 106 and in communication with the second communication tube 108, and the pump stack includes a second one-way pump 52 disposed in the second cooling tube section 106 and downstream of the second three-way proportional valve.
In this embodiment, the second one-way pump 52 mixes the hot water from the second water storage tank 22 with the cold water from the first water storage tank 21 via the second three-way proportional valve and sends the mixture back to the second water storage tank 22 and the heat exchanger 30, so that the second one-way pump 52 can reduce the return flow of the cooling water in the second cooling pipe segment 106 to the second return pipe segment 107. At this time, the temperature control system 100 accurately controls the temperatures of the second water storage tank 22 and the heat exchanger 30 by monitoring the temperature requirement of the flow tube 200 of the flow standard device in real time and adjusting the opening of the second three-way proportional valve through PID control of the controller, so that the temperature fluctuation of the second water storage tank 22 and the heat exchanger 30 does not exceed a set range, and the set range of the temperature fluctuation affects the calibration stability time of the instrument to be measured.
Specifically, the temperature in the second water storage tank 22 is accurately controlled by adjusting the opening degree of the second three-way proportional valve, so that the temperature fluctuation in the second water storage tank 22 does not exceed 0.5 degree.
With continued reference to fig. 1-4, in accordance with one embodiment of the present invention, temperature control system 100 further includes a pump stack disposed in the circulation flow path that controls fluid circulation communication within the circulation flow path between cooling tube 101 and return tube 102.
In the present embodiment, the pump unit includes the first one-way pump 51, the second one-way pump 52 and the return pump 53 disposed in the return pipe 102 and located between the cooling unit 10 and the first water storage tank 21, and the temperature control system 100 circulates the refrigerant in the circulation flow path along the direction of the cooling pipe 101, the return pipe 102 and the cooling pipe 101 through the pump unit, so as to improve the circulation efficiency of the refrigerant in the circulation flow path and reduce the occurrence of the medium backflow phenomenon in the circulation flow path.
According to an embodiment of the present invention, the temperature control system 100 further includes a temperature transmitter 70 disposed in the circulation flow path, and the temperature control system 100 controls the opening and closing of the first three-way proportional valve and the second three-way proportional valve according to the temperature of the refrigerant monitored by the temperature transmitter 70.
In this embodiment, temperature transmitters 70 are disposed near the first cooling pipe section 103, the second cooling pipe section 106, the first return pipe section 104, the second return pipe section 107, and the return pump 53, and the temperature transmitters 70 are configured to monitor the temperature of the refrigerant in each pipe section and send the temperature to the controller of the temperature control system 100, so that the controller of the temperature control system 100 can conveniently adjust the temperature of each pipe section, and the purpose of accurately adjusting the temperature of the refrigerant can be achieved.
According to an embodiment of the present invention, the temperature control system 100 further includes a surge tank 60 disposed in the circulation flow path, and the temperature control system 100 stabilizes the fluid pressure of the circulation flow path by the surge tank 60.
In the present embodiment, the flow speed of the medium in the circulation flow path also affects the heat exchange efficiency of the heat exchanger 30, and for this reason, the embodiment of the present invention proposes to provide the surge tank 60 in the circulation flow path, and to control the water pressure and the flow rate of the circulation flow path through the surge tank 60, so as to achieve the purpose of accurately controlling the temperature of the heat exchanger 30.
In addition, the above embodiments are only partial structures and components of the technical solutions of the present invention, and do not represent that the embodiments of the present invention only include the above components and structures, for example, the embodiments of the present application further include providing a filter 81, a flow switch 82, and a pressure gauge 83 in the circulation flow path, maintaining the circulation stability of the circulation flow path through the filter 81, controlling the opening and closing of the circulation flow path through the flow switch 82, monitoring the water pressure of the circulation flow path through the pressure gauge 83, and controlling the operating state of the surge tank 60 by monitoring the water pressure of the circulation flow path.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. The temperature control system of the flow standard device is characterized by comprising a circulating flow path formed by sequentially communicating a cooling unit, a water storage tank set and a heat exchanger, wherein the heat exchanger is in thermal contact with a flow pipe of the flow standard device, and the temperature control system controls the temperature of the heat exchanger through the cooling unit and the water storage tank set and adjusts the temperature of the flow pipe through the heat exchanger.
2. The temperature control system of the flow calibration device as claimed in claim 1, wherein the circulation flow path includes a cooling pipe connected from the cooling unit to the water storage tank set and the heat exchanger in sequence, and a return pipe connected from the heat exchanger to the water storage tank set and the cooling unit in sequence.
3. The temperature control system of a flow calibration device as claimed in claim 2, wherein the cooling pipe comprises a first cooling pipe section located between the water storage tank set and the heat exchanger, the return pipe comprises a first return pipe section located between the water storage tank set and the heat exchanger, and a first communication pipe and a first control valve for controlling the opening and closing of the first communication pipe are arranged between the first cooling pipe section and the first return pipe section.
4. The temperature control system of claim 3, wherein the water storage tank set comprises a first water storage tank and a second water storage tank connected in series, the first water storage tank is in communication with the chiller unit, and the second water storage tank is in communication with the heat exchanger.
5. The temperature control system according to claim 4, wherein the cooling pipe comprises a second cooling pipe section located between the first water storage tank and the second water storage tank, the return pipe comprises a second return pipe section located between the first water storage tank and the second water storage tank, and a second communication pipe and a second control valve for controlling opening and closing of the second communication pipe are arranged between the second cooling pipe section and the second return pipe section.
6. The temperature control system according to claim 5, further comprising a pump unit disposed in the circulation flow path, wherein the pump unit controls the refrigerant in the circulation flow path to circulate between the cooling pipe and the return pipe.
7. The temperature control system of a flow calibration device of claim 6, wherein the first control valve comprises a first three-way proportional valve disposed in the first cooling section and in communication with the first communication line, and the pump stack comprises a first one-way pump disposed in the first cooling section downstream of the first three-way proportional valve.
8. The temperature control system of claim 7, wherein the second control valve comprises a second three-way proportional valve disposed in the second cooling section and in communication with the second communication tube, and the pump stack comprises a second one-way pump disposed in the second cooling section and downstream of the second three-way proportional valve.
9. The temperature control system according to claim 8, further comprising a temperature transmitter disposed in the circulation flow path, wherein the temperature control system controls opening and closing of the first three-way proportional valve and the second three-way proportional valve according to a temperature of a refrigerant monitored by the temperature transmitter.
10. The temperature control system of the flow rate calibration device according to any one of claims 1 to 9, further comprising a surge tank provided in the circulation flow path, the temperature control system stabilizing the fluid pressure of the circulation flow path by the surge tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122992095.8U CN217006010U (en) | 2021-11-25 | 2021-11-25 | Temperature control system of flow standard device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122992095.8U CN217006010U (en) | 2021-11-25 | 2021-11-25 | Temperature control system of flow standard device |
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| Publication Number | Publication Date |
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| CN217006010U true CN217006010U (en) | 2022-07-19 |
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| CN202122992095.8U Active CN217006010U (en) | 2021-11-25 | 2021-11-25 | Temperature control system of flow standard device |
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| CN (1) | CN217006010U (en) |
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- 2021-11-25 CN CN202122992095.8U patent/CN217006010U/en active Active
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