A radar level meter

Abstract

The present invention discloses a radar level meter, comprising a joint, wherein the upper and lower ends of the joint are a wiring terminal and a threaded hole end respectively, and a ground end component, wherein the ground end component is threadedly connected to the threaded hole end of the joint and is used in conjunction with the joint to transmit signals; a signal transmission component, wherein the signal transmission component is arranged in the ground end component and passes through the joint to be connected to the wiring terminal and is used for signal transmission; an isolation component, wherein the isolation component is arranged in the ground end component and is passed through by the signal transmission component and is used to separate the ground end component from the signal transmission component; a protection component, wherein the protection component is arranged in the ground end component and is passed through by the signal transmission component and is used for insulation; and a pressing component, wherein the pressing component is arranged in the ground end component and is passed through by the protection component and is used to press the protection component.

Description

Technical Field

[0001] The invention relates to the technical field of level switches, and in particular to a radar level meter. Background Art

[0002] Radar level meter is a kind of liquid level measuring instrument commonly used in chemical industry. Radar level meter is based on the principle of time domain reflection. Guided wave radar is a measuring instrument based on the principle of time travel. Radar wave runs at the speed of light. The running time can be converted into level signal through electronic components. The probe sends out high-frequency pulses and transmits along the cable or rod probe. When the pulse encounters the surface of the material, it is reflected back and received by the receiver in the instrument, and the distance signal is changed into level signal. The electromagnetic pulse of radar level meter propagates along the waveguide rod or waveguide cable at the speed of light. When encountering the surface of the measured medium, part of the pulse of radar level meter is reflected to form an echo and returns to the pulse transmitter along the same path. The distance between the transmitter and the surface of the measured medium is proportional to the propagation time of the pulse in between. The liquid level height can be obtained by calculation.

[0003] However, the maximum temperature that the probe of the level meter in the prior art can withstand is 260 degrees Celsius, and the probe in the prior art cannot withstand higher temperatures; and in certain specific high temperature conditions, since the steam volume of the measured material will increase under high temperature conditions, the steam will affect the signal reflection and even penetrate into the probe, causing damage to the probe. Summary of the invention

[0004] The object of the present invention is to provide a radar level meter.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] A radar level meter comprises a joint, wherein the upper and lower ends of the joint are a wiring end and a threaded hole end respectively, and

[0007] A ground end component, the ground end component is threadedly connected to the threaded hole end of the connector and is used in conjunction with the connector to transmit signals;

[0008] A signal transmission component, which is arranged in the ground terminal component and passes through the connector to be connected to the wiring terminal for signal transmission;

[0009] an isolation component, the isolation component being arranged inside the ground end component and being passed through by the signal transmission component, and being used to separate the ground end component from the signal transmission component;

[0010] A protection component, which is arranged inside the ground end component and is passed through by the signal transmission component for insulation;

[0011] A pressing component is arranged inside the ground end component and is passed through by the protective component, so as to press the protective component.

[0012] Preferably, the ground end component comprises a mounting shell and a connecting bolt, wherein the connecting bolt is arranged at the end of the mounting shell and is integrally formed;

[0013] The other end of the mounting housing is threadedly connected in the threaded hole end of the connector.

[0014] Preferably, the isolation component comprises a pressing block, a receiving block and two glass tubes;

[0015] The receiving block is located between the two glass tubes, one of which is arranged inside the mounting shell and abuts against the inner wall of the connecting bolt, and the pressing block abuts against the end of the other glass tube for pressing the two glass tubes.

[0016] Preferably, the protective component comprises a sheath, which is arranged inside the mounting shell, one end of which extends into the joint, and the other end of which abuts against the pressing block for pressing the pressing block.

[0017] Preferably, the pressing component comprises a limiting block, the limiting block is threadedly connected to the inner wall of the mounting shell, the sheath passes through the limiting block and is pressed on the limiting block to compress and limit the sheath.

[0018] Preferably, the signal transmission component comprises a first center rod and a second center rod, wherein the first center rod and the second center rod are connected and integrally formed;

[0019] The first center rod passes through the inside of the sheath and passes through the joint to be connected with the wiring terminal, and the second center rod passes through the pressing block, the receiving block and the two glass tubes.

[0020] Preferably, a heat sink is provided on the mounting housing.

[0021] Preferably, an extension rod is integrally formed at the other end of the connecting bolt, and the second center rod extends into the interior of the extension rod.

[0022] In summary, the beneficial technical effects of the present invention are:

[0023] Through the improvement of the above structure, firstly, the signal transmission can be ensured by the signal transmission component. During the transmission, the signal transmission component is wrapped and separated at different positions in the ground end component by the isolation component and the protection component, so as to ensure that the signal transmission component is not affected by high temperature and high pressure. In addition, since the signal transmission component is for the transmission of electrical signals, it can also play an insulating role. The protection component can be fixed and pressed by the clamping component. The combination of the clamping component and the protection component can also play a sealing role, thereby further ensuring the sealing performance and preventing the high-temperature steam inside the tank from pouring up and damaging the probe. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an axonometric schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the explosion structure of the centerline section of the present invention.

[0027] Figure numerals: 1. connector; 2. ground end component; 21. mounting housing; 22. connecting bolt; 3. signal transmission component; 31. first center rod; 32. second center rod; 4. isolation component; 41. clamping block; 42. receiving block; 43. glass tube; 5. sheath; 6. limit block; 7. extension rod; 8. heat sink. DETAILED DESCRIPTION

[0028] The present invention will be described clearly and completely below with reference to the embodiments.

[0029] like Figure 1-3 As shown, the present invention discloses a radar level meter, comprising a connector 1, wherein the upper and lower ends of the connector 1 are a wiring terminal and a threaded hole end respectively, and a ground end component 2, wherein the ground end component 2 is threadedly connected to the threaded hole end of the connector 1 and is used in conjunction with the connector 1 to transmit signals; a signal transmission component 3, wherein the signal transmission component 3 is arranged in the ground end component 2 and passes through the connector 1 to be connected to the wiring terminal for signal transmission; an isolation component 4, wherein the isolation component 4 is arranged in the ground end component 2 and is passed through by the signal transmission component 3 and is used to separate the ground end component 2 from the signal transmission component; a protection component, wherein the protection component is arranged in the ground end component 2 and is passed through by the signal transmission component 3 and is used for insulation; and a pressing component, wherein the pressing component is arranged in the ground end component 2 and is passed through by the protection component and is used to press the protection component.

[0030] On the basis of the above embodiments, some other embodiments of the present application may be further increased or limited by one or more of the following combinations on the basis of the above specific embodiments.

[0031] like Figure 1-3 As shown,

[0032] The ground end component 2 includes a mounting shell 21 and a connecting bolt 22 . The connecting bolt 22 is arranged at the end of the mounting shell 21 and is integrally formed. The other end of the mounting shell 21 is threadedly connected to the threaded hole end of the joint 1 .

[0033] The installation shell 21 is the core component of the entire level meter installed on the tank body. The interior of the installation shell 21 is a structure with a cavity opened along the axial direction, and the signal transmission component 3, the isolation component 4 and the protection component are all arranged in the cavity and protected by the installation shell 21. During installation, the entire level meter is installed by threading it on the tank body through the connecting bolts 22. Since the installation shell 21 itself needs to be resistant to high temperature and high pressure, it is made of titanium alloy.

[0034] The isolation component 4 includes a clamping block 41, a receiving block 42 and two glass tubes 43; the receiving block 42 is located between the two glass tubes 43, one of the glass tubes 43 is arranged inside the mounting shell 21 and abuts against the inner wall of the connecting bolt 22, and the clamping block 41 abuts against the end of the other glass tube 43 for clamping the two glass tubes 43.

[0035] The signal transmission component 3 passes through the isolation component 4, specifically, between two glass tubes 43. Since the signal transmission component 3 is a waveguide with a relatively thin diameter, the glass tube 43 is required to limit and guide the signal transmission component 3, and the glass tube 43 is made of high-temperature resistant and insulating materials such as quartz glass to further prevent high temperature from affecting the signal transmission component 3 passing through the glass tube 43, and at the same time insulate the current on the waveguide. The receiving block 42 between the two glass tubes 43 can splice the two glass tubes 43 to prevent the two glass tubes 43 from directly contacting each other to produce gaps, and the pressing block 41 can press the two glass tubes 43 into the cavity of the mounting shell 21 for fixing, wherein the receiving block 42 and the pressing block 41 can be made of PI, PET, PAI, PSU, PPS, PEEK, PTFE and other materials, which have good high temperature resistance and sealing properties, and prevent high-temperature steam from flowing upward from the gap in the isolation component 4.

[0036] The protective component includes a sheath 5 , which is disposed inside the mounting housing 21 , one end of which extends into the connector 1 , and the other end of which abuts against the pressing block 41 for pressing the pressing block 41 .

[0037] The signal transmission component 3 is also exposed after extending from the glass tube 43, so the signal transmission component 3 can be wrapped by the sheath 5, which can also be made of PI, PET, PAI, PSU, PPS, PEEK, PTFE and other materials, to ensure the sealing of the sheath 5 and insulate the current of the signal transmission component 3 at this location. The sheath 5 abuts against the pressing block 41, and the pressing block 41 can be pressed against the glass tube 43, thereby fixing the glass tube 43.

[0038] The pressing component includes a limit block 6 , which is threadedly connected to the inner wall of the mounting shell 21 . The sheath 5 passes through the limit block 6 and is pressed against the limit block 6 to press and limit the sheath 5 .

[0039] The above-mentioned limiting block 6 is passed through the sheath 5. When the limiting block 6 is tightened, it abuts against the sheath 5, thereby fixing the sheath 5, and further fixing the pressing block 41 abutting against the sheath 5, thereby finally completing the fixing of the glass tube 43.

[0040] The signal transmission component 3 includes a first center rod 31 and a second center rod 32, which are connected and integrally formed. The first center rod 31 passes through the inside of the sheath 5 and passes through the inside of the joint 1 to be connected to the terminal, and the second center rod 32 passes through the clamping block 41, the receiving block 42 and the two glass tubes 43. The two center rods are both waveguides. The other end of the connecting bolt 22 is integrally formed with an extension rod 7, and the second center rod 32 extends to the inside of the extension rod 7. A cavity is also provided in the extension rod 7 along the axial direction, and the second center rod 32 extends in the cavity.

[0041] The first center rod 31 is connected to the terminal to receive the electrical signal from the connector 1, and transmits the signal to the second center rod 32 through the first center rod 31 to complete the signal transmission; since the tank body is deep, the extended second center rod 32 can be protected by the extension rod 7 to extend into the interior of the tank body, which is helpful for signal transmission.

[0042] The mounting shell 21 is provided with a heat sink 8. The heat sink 8 can further increase the heat dissipation area of ​​the mounting shell 21, thereby achieving a better heat dissipation effect.

[0043] In summary, through the improvement of the above structure, first of all, the signal transmission can be guaranteed by the signal transmission component 3. During the transmission, the signal transmission component 3 is wrapped and separated at different positions in the ground end component 2 by the isolation component 4 and the protective component, so as to ensure that the signal transmission component 3 is not affected by high temperature and high pressure. In addition, since the signal transmission component 3 is for the transmission of electrical signals, it can also play an insulating role. The protective component can be fixed and pressed by the clamping component. The combination of the clamping component and the protective component can also play a sealing role, thereby further ensuring the sealing performance and preventing the high-temperature steam inside the tank from being poured up and causing damage to the probe.

[0044] The above description is only a preferred specific implementation manner of the present invention, and is not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A radar level meter, characterized in that: It includes a connector, wherein the upper and lower ends of the connector are a wiring terminal and a threaded hole end, and A ground end component, the ground end component is threadedly connected to the threaded hole end of the connector and is used in conjunction with the connector to transmit signals; A signal transmission component, which is arranged in the ground terminal component and passes through the connector to be connected to the wiring terminal for signal transmission; an isolation component, the isolation component being arranged inside the ground end component and being passed through by the signal transmission component, and being used to separate the ground end component from the signal transmission component; A protection component, which is arranged inside the ground end component and is passed through by the signal transmission component for insulation; A pressing component, which is arranged inside the ground end component and is passed through by the protective component, and is used to press the protective component; The ground end component includes a mounting shell and a connecting bolt, wherein the connecting bolt is arranged at the end of the mounting shell and is integrally formed; The other end of the mounting housing is threadedly connected to the threaded hole end of the connector; The isolation component includes a pressing block, a receiving block and two glass tubes; The receiving block is located between the two glass tubes, one of which is arranged inside the mounting shell and abuts against the inner wall of the connecting bolt, and the pressing block abuts against the end of the other glass tube for pressing the two glass tubes.

2. The radar level meter according to claim 1, characterized in that: The protective component comprises a sheath, which is arranged inside the mounting shell, one end of which extends into the joint, and the other end of which abuts against the pressing block for pressing the pressing block.

3. The radar level meter according to claim 2, characterized in that: The pressing component comprises a limiting block, the limiting block is threadedly connected to the inner wall of the mounting shell, the sheath passes through the limiting block and is pressed on the limiting block to compress and limit the sheath.

4. The radar level meter according to claim 3, characterized in that: The signal transmission component comprises a first center rod and a second center rod, wherein the first center rod and the second center rod are connected and integrally formed; The first center rod passes through the inside of the sheath and passes through the joint to be connected with the wiring terminal, and the second center rod passes through the pressing block, the receiving block and the two glass tubes.

5. The radar level meter according to claim 2, characterized in that: The mounting shell is provided with a heat sink.

6. The radar level meter according to claim 4, characterized in that: The other end of the connecting bolt is integrally formed with an extension rod, and the second center rod extends into the interior of the extension rod.

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