Liquid level and temperature integrated monitoring device for railway tank car

Abstract

The invention relates to a liquid level and temperature monitoring device for a railway tank car, in particular to a liquid level and temperature integrated monitoring device for the railway tank car, and solves the technical problem that the space utilization rate in an adding and discharging device is low due to the fact that an existing mechanical liquid level meter and an existing thermometer cannot conduct real-time monitoring or occupy a large space. The liquid level acquisition element and the temperature acquisition element are integrated in the metal guide rod, and when the floater floats up and down along with the liquid level, the magnetic material in the floater interacts with the magnetic field generated by the liquid level sensing element in the guide rod so as to acquire the liquid level; the temperature sensing element clings to the inner wall of the guide rod and measures the temperature of the inner wall of the guide rod, so that the temperature of a medium in the tank is indirectly measured; data collected by the liquid level sensing element and the temperature sensing element are transmitted to the circuit element for processing, and then are transmitted to the meter head through a wire for display and remote transmission.

Description

Technical Field

[0001] The present invention relates to a liquid level and temperature monitoring device for railway tank cars, and particularly to an integrated liquid level and temperature monitoring device for railway tank cars. Background Art

[0002] Traditional railway tank cars do not have a device for real-time monitoring of the liquid level and temperature of the medium inside the tank. Although mechanical liquid level gauges and thermometers are used in liquefied gas railway tank cars to measure the liquid level and temperature of the medium, real-time monitoring of the liquid level and temperature of the medium inside the tank cannot be achieved, and the internal space of the addition and drainage device is cramped. The mechanical liquid level gauge and thermometer each occupy a part of the space, resulting in limited loading and unloading of valve groups such as stop valves, hand-operated pumps, and emergency cut-off valves, which is not conducive to the operation of loading and unloading vehicles. Summary of the Invention

[0003] The purpose of the present invention is to solve the technical problems that existing mechanical liquid level gauges and thermometers cannot perform real-time monitoring, or occupy a large amount of space, resulting in low space utilization rate inside the addition and drainage device, and to provide an integrated liquid level and temperature monitoring device for railway tank cars.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] An integrated liquid level and temperature monitoring device for railway tank cars, characterized in that it includes a guide rod, a float, a liquid level sensing element, a temperature sensing element, an electronic element, and a meter head;

[0006] The guide rod has a hollow structure and is installed in a through hole opened on the manhole cover of the railway tank car. The upper end of the guide rod extends out of the manhole cover, and the lower end is located inside the railway tank car;

[0007] The float has a hollow structure and is movably sleeved on the lower end of the guide rod, and can float up and down along the axis of the guide rod with the change of the liquid level of the medium inside the railway tank car;

[0008] The liquid level sensing element is installed inside the guide rod and is located at the lower end of the guide rod, and is used to cooperate with the float to measure the liquid level of the medium inside the railway tank car;

[0009] The temperature sensing element is closely attached to the inner wall of the guide rod and is located at the lower end of the guide rod, and is used to measure the temperature of the inner wall of the guide rod, so as to indirectly measure the temperature of the medium inside the railway tank car;

[0010] The electronic element is installed at the upper end of the guide rod. The input end of the electronic element is respectively connected to the output ends of the liquid level sensing element and the temperature sensing element, and the output end is connected to the meter head, and is used to receive the liquid level data measured by the liquid level sensing element and the temperature data measured by the temperature sensing element, and transmit them to the meter head;

[0011] The said header is used to receive and display the liquid level data measured by the liquid level sensing element and the temperature data measured by the temperature sensing element.

[0012] Furthermore, it also includes a flanged liner;

[0013] The said flanged liner is installed inside the float and is located between the float and the guide rod, and is used to protect the float, reducing the impact vibration sound and loss of the float.

[0014] Furthermore, the said header and the electronic component are an integrated component.

[0015] Furthermore, the said header and the electronic component are separately arranged.

[0016] Furthermore, it also includes electric wires, and the electric wires include a first electric wire and a second electric wire

[0017] The said first electric wire is used to connect the output end of the electronic component and the data input end of the header, so as to transmit the liquid level data measured by the liquid level sensing element and the temperature data measured by the temperature sensing element received by the electronic component;

[0018] The said second electric wire is used to connect the power output end of the header with the power supply ends of the liquid level sensing element, the temperature sensing element, and the electronic component respectively, so as to supply power to the liquid level sensing element, the temperature sensing element, and the electronic component.

[0019] Furthermore, the said guide rod is connected to the manhole cover by welding.

[0020] Furthermore, it also includes a connecting flange, and the said connecting flange is installed on the guide rod and is used to connect the guide rod and the manhole cover.

[0021] Furthermore, the said flanged liner is a PTFE flanged liner.

[0022] Furthermore, the said liquid level sensing element is a magnetostrictive liquid level sensing element, which is used to measure the liquid level height by the interaction between the emitted current pulse and the magnetic field emitted by the float.

[0023] Furthermore, the said temperature sensing element is a Pt1000 platinum thermal resistor.

[0024] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0025] An integrated liquid level and temperature monitoring device for railway tank cars provided by the present invention can achieve real-time monitoring of the liquid level and temperature of the medium in railway tank cars without liquid level and temperature monitoring devices. For railway tank cars transporting liquefied gas, it can completely replace mechanical liquid level gauges and thermometers, not only realizing real-time monitoring of the liquid level and temperature of the medium, but also saving internal space, improving the utilization rate of the internal space of the filling and discharging device, thus improving the convenience of valve group operation during loading and unloading operations, and enhancing the transportation safety and product competitiveness of railway tank cars. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is the overall structure diagram of the embodiment of the present invention;

[0027] Figure 2 It is the cross-sectional view of the guide rod in the embodiment of the present invention;

[0028] Figure 3 It is the installation schematic diagram of the embodiment of the present invention;

[0029] Figure 4 It is the partial enlarged view of the installation of the guide rod in the embodiment of the present invention;

[0030] The descriptions of the reference numerals are as follows:

[0031] 1 - Guide rod, 2 - Float, 3 - Flanged lining, 4 - Liquid level sensing element, 5 - Temperature sensing element, 6 - Connecting flange, 7 - Bolt, 8 - Electronic component, 9 - Electric wire, 10 - Gauge head, 100 - Manhole cover. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] To make the objectives, advantages, and features of the present invention clearer, the following further elaborates on an integrated liquid level and temperature monitoring device for railway tank cars proposed by the present invention in conjunction with the accompanying drawings and specific embodiments.

[0033] An integrated liquid level and temperature monitoring device for railway tank cars, as Figure 1 , Figure 2 shown, includes a guide rod 1, a float 2, a flanged lining 3, a liquid level sensing element 4, a temperature sensing element 6, a connecting flange 6, an electronic component 8, an electric wire 9, and a gauge head 10. Among them, the electronic component 8 and the gauge head 10 are separately arranged. In other embodiments, the electronic component 8 and the gauge head 10 can also be integrated components.

[0034] The guide rod 1 is installed in the through hole opened on the manhole cover 100 of the railway tank car. As Figure 3 shown, its upper end extends out of the manhole cover 100, and the lower end is located inside the railway tank car. The guide rod 1 is the fixed part of the monitoring device and is a slender hollow metal rod, and its length can be adjusted according to the maximum height of the liquid level of the measured medium in different railway tank cars. As Figure 4As shown in the figure, the connecting flange 6 is installed on the guide rod 1 and is used to connect the guide rod 1 to the manhole cover 100. The connecting flange 6 and the manhole cover 100 are connected by threads. The bolt 7 is installed on the connecting flange 6 and is used to realize the connection between the connecting flange 6 and the manhole cover 100. In other embodiments, the guide rod 1 and the manhole cover 100 can also be connected by welding.

[0035] The float 2 has a hollow structure and is movably sleeved on the lower end of the guide rod 1. It can float up and down along the axis of the guide rod 1 with the change of the liquid level of the medium inside the railway tank car. The float 2 is the floating part of the monitoring device and is a seal with a hollow structure. Its shape can be cylindrical or spherical. The function of the float 2 is to float up and down with the change of the liquid level of the measured medium.

[0036] The flanged liner 3 has a hollow structure and is installed inside the float 2 and is located between the float 2 and the guide rod 1. It is used to protect the float 2 and reduce the impact vibration sound and loss of the float 2. The flanged liner 3 is a PTFE flanged liner. When the float 2 floats up and down along the guide rod 1, it rotates and shakes arbitrarily. If the rotation and shaking are too large, it will generate a large sound and reduce the life of the float. The PTFE flanged liner can minimize the shaking and impact force of the float.

[0037] The liquid level sensing element 4 is installed inside the guide rod 1 and is located at the lower end of the guide rod 1. It is used to cooperate with the float 2 to measure the liquid level of the medium inside the railway tank car. The liquid level sensing element 4 is a magnetostrictive liquid level sensing element, which has an electronic transmitter that can emit current pulses and interact with the magnetic field emitted by the float 2 to measure the liquid level height.

[0038] The temperature sensing element 5 is installed on the inner wall of the guide rod 1 and is located at the lower end of the guide rod 1. It is used to measure the temperature of the inner wall of the guide rod 1, thereby indirectly measuring the temperature of the medium inside the railway tank car. The temperature sensing element 5 uses a Pt1000 platinum thermal resistance.

[0039] The electronic component 8 is installed at the upper end of the guide rod 1. The input end of the electronic component 8 is respectively connected to the output ends of the liquid level sensing element 4 and the temperature sensing element 5, and the output end is connected to the meter head 10. It is used to receive the liquid level data measured by the liquid level sensing element 4 and the temperature data measured by the temperature sensing element 5 and transmit them to the meter head 10. The electronic component 8 and the connecting flange 6 are an integral whole, and mainly electronic components are inside.

[0040] The wire 9 includes a first wire and a second wire. The first wire is used to connect the output terminal of the electronic component 8 to the data input terminal of the meter head 10, so as to transmit the liquid level data measured by the liquid level sensing element 4 and the temperature data measured by the temperature sensing element 5 received by the electronic component 8. The second wire is used to connect the power output terminal of the meter head 10 to the power supply terminals of the liquid level sensing element 4, the temperature sensing element 5, and the electronic component 8 respectively, so as to supply power to the liquid level sensing element 4, the temperature sensing element 5, and the electronic component 8.

[0041] The meter head 10 is used to receive, display, and transmit the data collected by the liquid level sensing element 4 and the temperature sensing element 5 and supply power to the liquid level sensing element 4, the temperature sensing element 5, and the electronic component 8. The meter head 10 can display each monitoring value on the window and also has a remote transmission function to transmit the monitored data to a specified monitoring platform to achieve the goal of remote monitoring. The battery pack built in the meter head 10 supplies power to the liquid level sensing element 4, the temperature sensing element 5, and the electronic component 8 through the wire 9, and also obtains the data collected by the above-mentioned sensing elements through the wire 9 and displays them.

[0042] The integrated liquid level and temperature monitoring device for railway tank cars provided in this embodiment integrates the liquid level acquisition element and the temperature acquisition element into the metal guide rod. When the float 2 floats up and down with the liquid level, the magnetic material therein interacts with the magnetic field generated by the liquid level sensing element 4 in the guide rod 1 to collect the liquid level of the medium. The temperature sensing element 5 is a temperature acquisition element, closely attached to the inner wall of the guide rod 1, and the temperature it measures is the inner wall temperature of the guide rod 1, so as to indirectly measure the temperature of the medium. The data collected by the liquid level sensing element 4 and the temperature sensing element 5 are transmitted to the circuit element 8 for processing and then transmitted to the meter head 10 through the wire 9.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the present invention.

Claims

1. An integrated liquid level and temperature monitoring device for railway tank cars, characterized in that: It includes a guide rod (1), a float (2), a liquid level sensing element (4), a temperature sensing element (5), an electronic component (8), and a meter head (10); The guide rod (1) has a hollow structure and is installed in a through hole opened on a manhole cover (100) of a railway tank car. The upper end of the guide rod (1) extends out of the manhole cover (100), and the lower end is located inside the railway tank car; The float (2) has a hollow structure and is movably sleeved on the lower end of the guide rod (1), and floats up and down along the axis of the guide rod (1) with the change of the liquid level of the medium inside the railway tank car; The liquid level sensing element (4) is installed inside the guide rod (1) and is located at the lower end of the guide rod (1) for cooperating with the float (2) to measure the liquid level of the medium inside the railway tank car; The temperature sensing element (5) is closely attached to the inner wall of the guide rod (1) and is located at the lower end of the guide rod (1) for measuring the temperature of the inner wall of the guide rod (1), thereby indirectly measuring the temperature of the medium inside the railway tank car; The electronic component (8) is installed at the upper end of the guide rod (1). The input ends of the electronic component (8) are respectively connected to the output ends of the liquid level sensing element (4) and the temperature sensing element (5), and the output end is connected to the meter head (10) for receiving the liquid level data measured by the liquid level sensing element (4) and the temperature data measured by the temperature sensing element (5) and transmitting them to the meter head (10); The meter head (10) is used for receiving and displaying the liquid level data measured by the liquid level sensing element (4) and the temperature data measured by the temperature sensing element (5).

2. The integrated liquid level and temperature monitoring device for a railway tank car according to claim 1, characterized in that: It also includes a flanged liner (3); The flanged liner (3) has a hollow structure and is installed inside the float (2) and is located between the float (2) and the guide rod (1) for protecting the float (2) and reducing the impact vibration sound and loss of the float (2).

3. The integrated liquid level and temperature monitoring device for railway tank cars according to claim 2, characterized in that: The meter head (10) and the electronic component (8) are an integrated component.

4. The integrated liquid level and temperature monitoring device for railway tank cars according to claim 2, characterized in that: The meter head (10) and the electronic component (8) are separately arranged.

5. The integrated liquid level and temperature monitoring device for railway tank cars according to claim 4, characterized in that: It also includes a wire (9), and the wire (9) includes a first wire and a second wire; The first wire is used for connecting the output end of the electronic component (8) to the data input end of the meter head (10), thereby transmitting the liquid level data measured by the liquid level sensing element (4) received by the electronic component (8) and the temperature data measured by the temperature sensing element (5); The second wire is used for connecting the power output end of the meter head (10) to the power supply ends of the liquid level sensing element (4), the temperature sensing element (5), and the electronic component (8) respectively, thereby supplying power to the liquid level sensing element (4), the temperature sensing element (5), and the electronic component (8).

6. The integrated liquid level and temperature monitoring device for railway tank cars according to claim 5, characterized in that: The guide rod (1) is connected to the manhole cover (100) by welding.

7. The integrated liquid level and temperature monitoring device for railway tank cars according to claim 5, characterized in that: It also includes a connecting flange (6), and the connecting flange (6) is installed on the guide rod (1) for connecting the guide rod (1) to the manhole cover (100).

8. A combined liquid level and temperature monitoring device for a railway tank car according to any one of claims 2-7, characterized in that: The flanged liner (3) is a PTFE flanged liner.

9. The integrated liquid level and temperature monitoring device for railway tank cars according to claim 8, characterized in that: The liquid level sensing element (4) is a magnetostrictive liquid level sensing element for measuring the liquid level height by the interaction of the emitted current pulse and the magnetic field emitted by the float (2).

10. The integrated liquid level and temperature monitoring device for railway tank cars according to claim 9, wherein: The temperature sensing element (5) is a Pt1000 platinum thermal resistance.

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