An instrument cooling device with automatic liquid discharge

Abstract

The utility model discloses an instrument cooling device with automatic liquid discharge, related to cooling device technical field, the utility model discloses an instrument air inlet is provided with one end of heat exchanger and the flow pipe, the outside of heat exchanger is provided with medium transmission subassembly and liquid discharge mechanism, medium transmission subassembly includes medium inlet and sample outlet, and the electric control mechanism is arranged between sample outlet and flow pipe, first ball valve, filtration pressure reducing valve and eddy current pipe are still arranged in proper order on the flow pipe, and the eddy current pipe is used to carry out cooling treatment to instrument air and input to heat exchanger, and the flow pipe is provided with compressor in parallel, in the utility model, the eddy current pipe and compressor parallel connection double -cold -source setting promote system reliability: when instrument air pressure is lower than the preset threshold value, and second electric control valve switches to the compressor cold source automatically, avoids the shutdown caused by single cold source failure, and the actual measurement failure rate reduces.

Description

Technical Field

[0001] This utility model relates to the field of cooling device technology, specifically to an instrument cooling device with automatic liquid drainage. Background Technology

[0002] Instrument air is the air used to power the regulating mechanisms in automated instruments, such as pneumatic valves and flow meters. It is usually compressed air generated by an air compressor, which is filtered and dried before being supplied to the instruments. The quality of instrument air is crucial to the accuracy and reliability of the instruments, so there are certain requirements for its pressure, dew point and other parameters. In industrial production, the instrument air system is an important utility system that provides a stable and reliable power source for various automated instruments in the factory. A search revealed that the announcement number CN220289510U discloses "a novel gas chromatography sample pretreatment system", which states that: high-temperature gas samples first enter the filter 3 through the main gas pipeline 1 for preliminary filtration, removing impurities and heavy oil components from the gas samples. After filtration, the gaseous sample enters heat exchanger 2 for cooling. The instrument air is cooled by vortex tube 6 and enters the shell side of heat exchanger 2, providing refrigerant and rapidly cooling the gaseous sample. After cooling, the gaseous sample enters coalescer 4 for coalescence separation. Coalescer 4 is filled with a coalescing filter element, which preferentially adsorbs liquid molecules (such as water molecules). Under the action of a special surfactant, through processes such as capture, adsorption, coalescence, sedimentation, and transformation, the adsorbed liquid molecules gradually grow and form large droplets that fall off and are discharged outside the system by the automatic drainage system, achieving separation of the gas and liquid phases. This ensures that only the gas phase enters the chromatographic analysis system. However, there is a problem: the original system relies entirely on the vortex tube to consume instrument air for cooling, which cannot operate in environments with unstable air pressure. Therefore, the inventors urgently need to design an instrument air pressure control mechanism to improve the functionality and practicality of the instrument air cooling device. Utility Model Content

[0003] Therefore, the purpose of this utility model is to provide an instrument cooling device with automatic liquid drainage to solve the technical problem of inaccurate instrument air pressure control.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an instrument cooling device with automatic liquid drainage, comprising a heat exchanger and a conveying pipe, wherein one end of the conveying pipe is provided with an instrument air inlet, and a medium transmission component and a liquid drainage mechanism are provided on the outside of the heat exchanger, wherein the medium transmission component includes a medium inlet and a sample outlet, and an electrical control mechanism is provided between the sample outlet and the conveying pipe; The feed pipe is also sequentially equipped with a first ball valve, a filter pressure reducing valve and a vortex tube. The vortex tube is used to cool the instrument air and input it to the heat exchanger. A compressor is connected in parallel on the feed pipe, and a second electrically controlled valve is installed on the parallel pipeline between the feed pipe and the compressor. Electronic pressure gauges are installed at both the inlet and outlet ends of the vortex tube. The drainage mechanism includes an automatic drainer and a condensate discharge port, used to automatically remove condensate generated by the heat exchanger.

[0005] By adopting the above technical solution, the dual cold source setup integrating the vortex tube and the compressor significantly improves system reliability: when the instrument air pressure fluctuation exceeds the preset threshold, the second electrically controlled valve automatically switches to the compressor cold source, avoiding shutdown due to the failure of a single cold source and ensuring continuous industrial production. At the same time, the draining mechanism, combined with the gravity reflux structure of the shell-and-tube heat exchanger, can automatically drain condensate, completely solving the problems of reduced heat exchange efficiency and pipeline blockage caused by condensation accumulation in traditional devices, and reducing maintenance costs.

[0006] Furthermore, the electrical control mechanism includes a first electrically controlled valve, a temperature controller is provided on one side of the first electrically controlled valve, a temperature sensing end is provided at the bottom of the temperature controller, the temperature sensing end is directly installed at the sample outlet and connected to the temperature controller through a data cable, and the first electrically controlled valve is electrically connected to an external power supply through a control center for real-time adjustment of the flow rate of the instrument air in the delivery pipe.

[0007] By adopting the above technical solution, the closed-loop control mechanism of the electronic control mechanism achieves precise temperature control: the temperature sensor is directly installed at the sample outlet, and the temperature data is fed back to the temperature controller in real time. The instrument airflow is dynamically adjusted through the PID algorithm to control the temperature difference within ±0.5℃, ensuring the stability of the medium cooling process.

[0008] Furthermore, the media transfer assembly also includes a second ball valve, a filter, and a pressure reducing valve, which are sequentially arranged between the media inlet and the sample outlet.

[0009] By adopting the above technical solution, the three-stage series design of the media transmission component forms an efficient media pretreatment chain. The second ball valve provides an emergency shut-off function to prevent media backflow. The filter can intercept dust particles to avoid blockage of the heat exchanger tubes. The pressure reducing valve stabilizes the media pressure to the preset pressure value to eliminate the interference of pressure changes on heat exchange.

[0010] Furthermore, the filter is used to filter dust in the medium, and the pressure reducing valve is used to reduce the pressure in the medium.

[0011] By adopting the above technical solution, the filter can deeply filter the dust in the medium, directly preventing fine particles from adhering to the heat exchanger tube wall and maintaining heat transfer efficiency.

[0012] Furthermore, the front surface of the first electrically controlled valve is equipped with a digital display screen and a control panel for real-time display and adjustment of temperature parameters.

[0013] By adopting the above technical solution, operators can directly set the target temperature, PID parameters and alarm thresholds through the control panel, and the digital display screen provides real-time feedback on flow rate, temperature and valve opening data, which greatly reduces the error rate.

[0014] Furthermore, the electronic control mechanism also includes a PID control algorithm for achieving precise closed-loop temperature control.

[0015] By adopting the above technical solution, the opening compensation of the first electrically controlled valve is dynamically calculated by comparing the measured value and the set value of the temperature sensor in real time, thus overcoming the temperature oscillation problem of traditional on / off control.

[0016] Furthermore, the heat exchanger is a shell-and-tube heat exchanger, with the medium inlet located at the bottom and the sample outlet located at the top, which facilitates condensate reflux.

[0017] By adopting the above technical solution, the condensate naturally sinks to the bottom and is automatically discharged by the drainage mechanism, completely avoiding the liquid accumulation problem caused by horizontal installation.

[0018] In summary, the present invention has the following main advantages: In this invention, the parallel connection of the vortex tube and the compressor as dual cold sources improves system reliability: when the instrument air pressure is lower than the preset threshold, the second electrically controlled valve automatically switches to the compressor cold source, avoiding shutdown caused by the failure of a single cold source, and reducing the measured failure rate.

[0019] In this invention, the automatic drainer and condensate discharge port of the draining mechanism are combined with the gravity reflux structure of the shell and tube heat exchanger to realize automatic discharge of condensate, eliminate the risk of blockage, and reduce the frequency of maintenance. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the process structure of this utility model; Figure 2 This is a schematic diagram of the structure of the electrical control mechanism of this utility model; Figure 3 This is a schematic diagram of the structure of the electrically controlled valve of this utility model; Figure 4 This is a schematic diagram of the structure of the temperature controller of this utility model.

[0021] In the diagram: 1. Instrument air inlet; 2. First ball valve; 3. Filter pressure reducing valve; 4. Vortex tube; 5. Heat exchanger; 6. Transfer pipe; 7. Electrical control mechanism; 701. First electrically controlled valve; 702. Temperature controller; 703. Temperature sensor; 704. Digital display screen; 705. Control panel; 8. Media transfer assembly; 801. Media inlet; 802. Second ball valve; 803. Filter; 804. Pressure reducing valve; 805. Sample outlet; 9. Drainage mechanism; 901. Automatic drainer; 902. Condensate discharge port; 10. Second electrically controlled valve; 11. Compressor. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0023] The embodiments of this utility model will be described below based on its overall structure.

[0024] In this embodiment: An instrument cooling device with automatic liquid drainage, such as Figures 1-4 As shown, it includes a heat exchanger 5 and a transfer pipe 6. One end of the transfer pipe 6 is provided with an instrument air inlet 1. The outside of the heat exchanger 5 is provided with a medium transfer assembly 8 and a draining mechanism 9. The medium transfer assembly 8 includes a medium inlet 801 and a sample outlet 805. An electrical control mechanism 7 is provided between the sample outlet 805 and the transfer pipe 6. The transmission pipe 6 is also equipped with a first ball valve 2, a filter pressure reducing valve 3 and a vortex tube 4 in sequence. The vortex tube 4 is used to cool the instrument air and input it to the heat exchanger 5. A compressor 11 is connected in parallel on the transmission pipe 6, and a second electrically controlled valve 10 is installed on the parallel pipeline between the transmission pipe 6 and the compressor 11. Electronic pressure gauges are installed at both the inlet and outlet ends of the vortex tube 4. The draining mechanism 9 includes an automatic drainer 901 and a condensate discharge port 902, which are used to automatically remove condensate generated by the heat exchanger 5.

[0025] The integrated dual-cold-source setup of the vortex tube 4 and compressor 11 significantly improves system reliability: when the instrument air pressure fluctuation exceeds the preset threshold, the second electrically controlled valve 10 automatically switches to the compressor cold source to avoid shutdown due to the failure of a single cold source, ensuring continuous industrial production. At the same time, the draining mechanism 9, combined with the gravity reflux structure of the shell-and-tube heat exchanger 5, can automatically drain condensate, completely solving the problems of reduced heat exchange efficiency and pipeline blockage caused by condensation accumulation in traditional devices, thus reducing maintenance costs. In addition, the real-time monitoring of the vortex tube inlet and outlet by the electronic pressure gauge provides data support for the refrigerant status, further enhancing system stability.

[0026] See Figure 1 , Figure 2 The electrical control mechanism 7 includes a first electrically controlled valve 701. A temperature controller 702 is installed on one side of the first electrically controlled valve 701, and a temperature sensor 703 is installed at the bottom of the temperature controller 702. The temperature sensor 703 is directly installed at the sample outlet 805 and connected to the temperature controller 702 via a data cable. The first electrically controlled valve 701 is electrically connected to an external power supply through the control center and is used to adjust the flow rate of the instrument air in the delivery pipe 6 in real time. The closed-loop control mechanism of the electrical control mechanism 7 achieves precise temperature control: the temperature sensor 703 is directly installed at the sample outlet 805 and feeds back the temperature data to the temperature controller 702 in real time. The instrument air flow rate is dynamically adjusted through a PID algorithm to control the temperature difference within ±0.5℃, ensuring the stability of the medium cooling process. At the same time, the electrical connection between the first electrically controlled valve 701 and the control center supports remote control, reducing the need for manual intervention. It is especially suitable for high-risk chemical environments and improves the convenience and safety of system operation.

[0027] See Figure 1 , Figure 2 The media transfer assembly 8 also includes a second ball valve 802, a filter 803, and a pressure reducing valve 804, which are sequentially arranged between the media inlet 801 and the sample outlet 805. The three-stage series design of the media transfer assembly 8 forms an efficient media pretreatment chain. The second ball valve 802 provides an emergency shut-off function to prevent media backflow; the filter 803 can intercept dust particles to avoid blockage of the heat exchanger 5 tubes; the pressure reducing valve 804 stabilizes the media pressure to a preset pressure value, eliminating the interference of pressure changes on heat exchange. At the same time, this combination significantly improves the purity and fluidity of the media and extends the service life of downstream components such as coalescing filter elements.

[0028] See Figure 1 , Figure 2 , Figure 4 The filter 803 is used to filter dust in the medium, and the pressure reducing valve 804 is used to reduce the pressure in the medium. The filter 803 deeply filters the dust in the medium, directly preventing fine particles from adhering to the tube wall of the heat exchanger 5 and maintaining the heat transfer efficiency. At the same time, the pressure reducing valve 804 prevents the high-pressure medium from impacting the heat exchanger tubes and causing deformation and leakage through the pressure limiting protection mechanism. Moreover, the flow rate of the medium after pressure reduction is more suitable for the heat exchange requirements, so that the condensate generation rate matches the processing capacity of the drain mechanism 9 and eliminates the risk of liquid level overload.

[0029] See Figure 1 , Figure 2 , Figure 4The front surface of the first electrically controlled valve 701 is equipped with a digital display screen 704 and a control panel 705 for real-time display and adjustment of temperature parameters. Operators can directly set the target temperature, PID parameters and alarm thresholds through the control panel 705. The digital display screen 704 provides real-time feedback of flow, temperature and valve opening data, which greatly reduces the error rate. At the same time, it supports rapid fault diagnosis and shortens the fault troubleshooting time, making it especially suitable for unattended automated factories.

[0030] See Figure 1 , Figure 2 The electronic control mechanism 7 also includes a PID control algorithm to achieve precise closed-loop temperature control. By comparing the measured value and the set value of the temperature sensor 703 in real time, the algorithm dynamically calculates the opening compensation of the first electronically controlled valve 701, overcoming the temperature oscillation problem of traditional on / off control. At the same time, the algorithm adapts to the fluctuation of instrument air pressure and automatically adjusts parameters to ensure temperature control stability under different operating conditions, thereby improving system energy efficiency.

[0031] See Figure 1 , Figure 2 Heat exchanger 5 is a shell-and-tube heat exchanger with its medium inlet located at the bottom and sample outlet located at the top, which facilitates condensate reflux. The condensate naturally sinks to the bottom and is automatically discharged by the drainage mechanism 9, completely avoiding the liquid accumulation problem caused by horizontal installation. At the same time, this structure promotes the formation of turbulence in the medium within the tubes, enhances heat exchange efficiency, and avoids local low-temperature freezing and blockage, making it especially suitable for high-humidity gas phase samples.

[0032] The implementation principle of this utility model is as follows: First, the medium is transported from the medium inlet 801 by a pump, and then passes through the second ball valve 802, filter 803, pressure reducing valve 804 and heat exchanger 5 in sequence, and finally flows out from the sample outlet 805. During this process, the instrument air on one side flows through the conveying pipe 6 through the first ball valve 2, filter pressure reducing valve 3, electric control valve 701 and vortex tube 4 in sequence until it enters the interior of the heat exchanger 5, and is used to pre-treat the medium by cooling, thus completing the pre-treatment operation of the medium. Subsequently, the water droplets generated by the operation of the heat exchanger 5 are discharged from the condensate discharge port 902 through the automatic drain 901. During the cooling pretreatment of the medium, the temperature of the pretreated medium at the sample outlet 805 is monitored in real time using the temperature sensor 703. According to the temperature value set on the temperature controller 702, when the sample temperature is detected to be low, the signal is transmitted to the control center, which then controls the opening of the electric control valve 701 to narrow, reducing the flow of instrument air, and vice versa. By using real-time monitoring of the sample temperature, the pretreatment quality of the medium can be improved and the operational risks in the production process can be reduced. When the instrument air pressure is insufficient, the second electronically controlled valve 10 automatically switches to the parallel compressor 11 as a backup cold source to ensure continuous cooling capacity. This process, together with the filter pressure reducing valve 3 and the electronic pressure gauge, stabilizes the cold source pressure and provides instrument air with stable pressure, reducing large pressure fluctuations.

[0033] All parts not covered in this utility model are the same as or can be implemented using existing technologies, and will not be described in detail here.

[0034] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. An instrument cooling device with automatic liquid drainage, characterized in that: It includes a heat exchanger (5) and a transfer pipe (6). One end of the transfer pipe (6) is provided with an instrument air inlet (1). The outside of the heat exchanger (5) is provided with a medium transfer assembly (8) and a draining mechanism (9). The medium transfer assembly (8) includes a medium inlet (801) and a sample outlet (805). An electrical control mechanism (7) is provided between the sample outlet (805) and the transfer pipe (6). The conveying pipe (6) is also provided with a first ball valve (2), a filter pressure reducing valve (3) and a vortex tube (4) in sequence. The vortex tube (4) is used to cool the instrument air and input it to the heat exchanger (5). A compressor (11) is connected in parallel on the conveying pipe (6), and a second electrically controlled valve (10) is installed on the parallel pipeline between the conveying pipe (6) and the compressor (11). Electronic pressure gauges are installed at both the inlet and outlet ends of the vortex tube (4). The draining mechanism (9) includes an automatic drainer (901) and a condensate discharge port (902) for automatically draining condensate generated by the heat exchanger (5).

2. The instrument cooling device with automatic liquid drainage according to claim 1, characterized in that: The electrical control mechanism (7) includes a first electrical control valve (701), a temperature controller (702) is provided on one side of the first electrical control valve (701), a temperature sensing end (703) is provided at the bottom of the temperature controller (702), the temperature sensing end (703) is directly installed at the sample outlet (805) and connected to the temperature controller (702) via a data cable, and the first electrical control valve (701) is electrically connected to an external power supply through a control center to adjust the flow rate of the instrument air in the delivery pipe (6) in real time.

3. The instrument cooling device with automatic liquid drainage according to claim 1, characterized in that: The media transmission assembly (8) also includes a second ball valve (802), a filter (803) and a pressure reducing valve (804), which are sequentially arranged between the media inlet (801) and the sample outlet (805).

4. The instrument cooling device with automatic liquid drainage according to claim 3, characterized in that: The filter (803) is used to filter dust in the medium, and the pressure reducing valve (804) is used to reduce the pressure in the medium.

5. The instrument cooling device with automatic liquid drainage according to claim 2, characterized in that: The front surface of the first electrically controlled valve (701) is provided with a digital display screen (704) and a control panel (705) for real-time display and adjustment of temperature parameters.

6. The instrument cooling device with automatic liquid drainage according to claim 1, characterized in that: The electronic control mechanism (7) also includes a PID control algorithm for achieving precise closed-loop temperature control.

7. The instrument cooling device with automatic liquid drainage according to claim 1, characterized in that: The heat exchanger (5) is a shell-and-tube heat exchanger with its medium inlet located at the bottom and the sample outlet located at the top, which facilitates condensate reflux.

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