A guided wave radar probe for urea solution level measurement

Abstract

The application discloses a guided wave radar probe for urea solution liquid level measurement, which comprises an electronic unit, a center rod, one end of which is electrically connected with the electronic unit, and the other end is connected with a center extension rod, and an outer edge part is arranged at the end of the center extension rod; a ground end connecting kit is arranged outside the center extension rod for connecting with an external structure, and a positioning ring groove is arranged in the ground end connecting kit; a sealing and corrosion-proof block is sleeved on the center extension rod, the sealing and corrosion-proof block extends into the positioning ring groove, and the outer edge part is pressed onto the sealing and corrosion-proof block; an insulating pressing block is arranged between the center rod and the center extension rod, one end of the insulating pressing block is pressed onto the outer edge part; and an external kit is arranged outside the center rod, and one end of the external kit is pressed onto the insulating pressing block. The application solves the problem that the existing probe for monitoring urea solution is easily corroded and ammonia seepage occurs during use.

Description

Technical Field

[0001] This disclosure relates to the field of measurement technology, and in particular to a guided wave radar probe for measuring the level of urea solution. Background Technology

[0002] Currently, in some chemical plants that produce urea solutions or ammonia, the tanks used to store urea solutions must be well-sealed to prevent ammonia leakage. If ammonia leakage occurs, it will inevitably cause great danger.

[0003] Currently, probes for monitoring the urea solution level are generally installed on tanks storing urea solution. However, these probes are prone to corrosion and leakage during use. In addition, these probes have a short service life and are not stable enough for monitoring, which could potentially lead to dangerous situations.

[0004] Therefore, there is an urgent need for a guided wave radar probe that can be used for a long time and is not easily corroded to prevent ammonia seepage in the scenario of urea solution monitoring. Summary of the Invention

[0005] The purpose of this disclosure is to provide a guided wave radar probe for measuring the level of urea solution, which solves the problem that existing probes for monitoring urea solution are easily corroded during use, resulting in ammonia leakage.

[0006] To achieve the above objectives, a first aspect of this disclosure provides a guided wave radar probe for measuring the level of urea solution, comprising:

[0007] Electronic unit;

[0008] The central rod has one end electrically connected to the electronic unit and the other end connected to a central extension rod, the end of which is provided with an outer edge.

[0009] A ground connection kit is disposed outside the central extension rod for connection with an external structure, and a positioning ring groove is provided inside the ground connection kit;

[0010] A sealing and anti-corrosion block is fitted onto the central extension rod, the sealing and anti-corrosion block extends into the positioning ring groove, and the outer edge is pressed onto the sealing and anti-corrosion block;

[0011] An insulating clamping block is disposed between the central rod and the central extension rod, with one end of the insulating clamping block pressed against the outer edge portion;

[0012] An external kit is disposed outside the center rod, with one end of the external kit pressed against the insulating clamping block.

[0013] In some embodiments, the sealing and corrosion-resistant block is made of quartz glass.

[0014] In some embodiments, the sealing and anti-corrosion block is provided with a limiting groove, and at least a portion of the outer edge is engaged with the limiting groove.

[0015] In some embodiments, the guided wave radar probe further includes a first graphite pad;

[0016] The sealing and anti-corrosion block is provided with a receiving groove, the cross-sectional area of ​​which is smaller than that of the limiting groove. The first graphite gasket is disposed in the receiving groove and is pressed against the outer edge.

[0017] In some embodiments, the guided wave radar probe further includes a second graphite pad;

[0018] The ground connection kit has an annular groove, the second graphite gasket is disposed in the annular groove, and the second graphite gasket abuts against the sealing and anti-corrosion block.

[0019] In some embodiments, the external kit includes:

[0020] A connector tube is disposed at the connection between the electronic unit and the central rod;

[0021] A clamping element is fitted onto the outside of the center rod, with one end of the clamping element threaded into the ground connection kit and pressed against the insulating clamping block;

[0022] A welding base is fitted onto the outside of the central rod. One end of the welding base is connected to the clamping member, and the other end is connected to the connector tube.

[0023] In some embodiments, the guided wave radar probe further includes an insulating and sealing connector disposed between the welding base and the clamping member;

[0024] The insulating sealing connector includes a sealing tube and a fixing ring, the fixing ring being fixed to the sealing tube, and the central rod passing through the sealing tube and the fixing ring.

[0025] The clamping component is provided with a snap-fit ​​groove, and the fixing ring is snapped into the snap-fit ​​groove.

[0026] In some embodiments, the guided wave radar probe further includes an insulating positioning sleeve, which is sleeved onto the central rod, and the outer wall of the insulating positioning sleeve is attached to the outer wall of the clamping member, so as to press the insulating positioning sleeve onto the central rod by the clamping member.

[0027] In some embodiments, the guided wave radar probe further includes an insulating sleeve, which is sleeved onto the upper end of the central rod;

[0028] The welding base is provided with a pressing groove, the insulating sleeve is disposed in the pressing groove, and the inner wall of the pressing groove is pressed against the outer wall of the insulating sleeve.

[0029] In some embodiments, the guided wave radar probe further includes:

[0030] A mounting base is detachably connected to the connector tube, and the electronic unit is disposed within the mounting base;

[0031] The top cover is detachably fixed to the mounting base to enclose the electronic unit within the mounting base.

[0032] By adopting the above technical solution, and utilizing the sealing and anti-corrosion blocks and insulating clamping components, when monitoring urea solution, the sealing and anti-corrosion blocks effectively prevent solution from entering the probe through them and causing corrosion. Furthermore, the inherent properties of the sealing and anti-corrosion blocks make them less susceptible to corrosion and leakage, thus extending the probe's lifespan. Additionally, by pressing the insulating clamping block onto the outer edge and then tightening the outer sleeve against it, electrical conductivity between the outer sleeve and the central rod is prevented. This also allows the outer edge of the central extension rod to be more tightly pressed against the sealing and anti-corrosion blocks, further enhancing the sealing effect and better preventing ammonia leakage.

[0033] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0034] The accompanying drawings are provided to further understand the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof.

[0035] In the attached diagram:

[0036] Figure 1 This is a schematic diagram of the overall structure of the guided wave radar probe for measuring the liquid level of urea solution provided by the present invention.

[0037] Figure 2 This is an exploded structural diagram of the guided wave radar probe for measuring the liquid level of urea solution provided by the present invention.

[0038] Figure 3 This is an exploded structural diagram of the upper part of the guided wave radar probe for measuring the liquid level of urea solution provided by the present invention.

[0039] Figure 4 This is an exploded structural diagram of the lower part of the guided wave radar probe for measuring the liquid level of urea solution provided by the present invention.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1. Top cover; 2. Electronic unit; 3. Fixing base; 4. Connector tube; 5. Center rod; 6. Insulating sleeve; 7. Welding base; 71. Pressing groove; 8. Insulating sealing connector; 81. Sealing pipe fitting; 82. Fixing ring; 9. Insulating positioning sleeve; 10. Pressing component; 101. Snap-fit ​​groove; 11. Insulating pressing block; 12. Center extension rod; 121. Outer edge; 13. Sealing and anti-corrosion block; 131. Limiting groove; 132. Receiving groove; 14. Ground connection kit; 141. Positioning ring groove; 142. Annular groove; 15. First graphite gasket; 16. Second graphite gasket. Detailed Implementation

[0042] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0043] This disclosure provides a guided wave radar probe for measuring the level of urea solution, such as... Figures 1-4 As shown, the guided wave radar probe includes an electronic unit 2, a central rod 5, a ground connection kit 14, a sealing and anti-corrosion block 13, an insulating clamping block 11, and an external kit. One end of the central rod 5 is electrically connected to the electronic unit 2, and the other end is connected to a central extension rod 12. An outer edge 121 is provided at the end of the central extension rod 12. The ground connection kit 14 is located outside the central extension rod 12 for connection to external structures, and a positioning ring groove 141 is provided within the ground connection kit 14. The sealing and anti-corrosion block 13 is sleeved and fixed to the central extension rod 12, extending into the positioning ring groove 141, with the outer edge 121 pressed against it. The insulating clamping block 11 is located between the central rod 5 and the central extension rod 12, with one end pressed against the outer edge 121. Additionally, the external kit is located outside the central rod 5, with one end pressed against the insulating clamping block 11.

[0044] Using this structure, the probe can be installed onto the external tank structure using the ground connection kit 14, while the central extension rod 12 can extend into the tank to measure the urea solution level, thereby transmitting the level information to the electronic unit 2 via the central rod 5. Simultaneously, the sealing and corrosion-resistant block 13 prevents solution from entering the probe and causing corrosion. The inherent properties of the sealing and corrosion-resistant block 13 also prevent corrosion and leakage, thus extending the probe's lifespan. Furthermore, after pressing the insulating clamping block 11 onto the outer edge 121 and tightening the external kit against it, electrical conductivity between the external kit and the central rod 5 is prevented. This also allows the outer edge 121 of the central extension rod 12 to be more tightly pressed against the sealing and corrosion-resistant block 13, further enhancing the sealing effect and better preventing ammonia leakage.

[0045] Furthermore, the aforementioned sealing and anti-corrosion block 13 is made of quartz glass, and the dielectric constant of the quartz glass is 3.75 or higher.

[0046] Because quartz glass has good corrosion resistance, the sealing and anti-corrosion block 13 made of quartz glass can effectively prevent it from being corroded and damaged by urea solution. At the same time, after the dielectric constant of quartz glass reaches this value, its purity will be high and will not affect the normal use of the probe.

[0047] In some embodiments, a limiting groove 131 is provided on the sealing and anti-corrosion block 13, and at least a portion of the outer edge 121 is engaged in the limiting groove 131.

[0048] In this way, the central extension rod 12 can be limited to a certain extent, and the sealing and anti-corrosion block 13 can be better fixed to the central extension rod 12.

[0049] In some embodiments, the guided wave radar probe further includes a first graphite gasket 15, and a receiving groove 132 is provided on the sealing and anti-corrosion block 13. The cross-sectional area of ​​the receiving groove 132 is smaller than the cross-sectional area of ​​the limiting groove 131. The first graphite gasket 15 is disposed in the receiving groove 132 and abuts against the outer edge 121.

[0050] The first graphite gasket 15, being relatively soft, provides some protection for the sealing and corrosion-resistant block 13. It also improves the sealing performance between the sealing and corrosion-resistant block 13 and the outer edge 121, resulting in a more stable connection. Since inorganic adhesives cannot be used for sealing and fixing under these urea solution monitoring conditions, and organic adhesives are prone to changes in adhesion upon contact with water, the graphite gasket effectively improves the sealing performance without affecting the normal operation of the probe.

[0051] Furthermore, the aforementioned guided wave radar probe also includes a second graphite gasket 16. An annular groove 142 is provided in the ground connection kit 14, and the second graphite gasket 16 is disposed in the annular groove 142 and abuts against the sealing and anti-corrosion block 13.

[0052] By using the second graphite gasket 16, the sealing performance between the sealing anti-corrosion block 13 and the ground connection kit 14 can be improved, preventing urea solution from seeping out from here.

[0053] In some embodiments, the external kit includes a connector tube 4, a clamping member 10, and a welding base 7. The connector tube 4 is disposed at the connection between the electronic unit 2 and the central rod 5. The clamping member 10 is sleeved on the outside of the central rod 5, and one end of the clamping member 10 is threaded to the ground connection kit 14 and abuts against the insulating clamping block 11. The welding base 7 is sleeved on the outside of the central rod 5, and one end of the welding base 7 is welded and fixed to the clamping member 10, while the other end is connected to the connector tube 4.

[0054] Specifically, the ground connection kit 14 has an internal thread, and the clamping member 10 has an external thread on one side. This allows the clamping member 10 to further press the clamping block against the outer edge 121 after being screwed into the ground connection kit 14. The end of the connector tube 4 that connects to the welding base 7 has an internal thread, and the welding base 7 has an external thread, allowing the welding base 7 to be threaded into the connector tube 4. This achieves the connection between the welding base 7 and the connector tube 4, ensuring that the connector tube 4, the clamping member 10, and the welding base 7 are stably fixed together to form the external kit.

[0055] In addition, the above-mentioned guided wave radar probe also includes a mounting base 3 and a top cover 1. The mounting base 3 is detachably connected to the connector tube 4, and the electronic unit 2 is fixedly installed inside the mounting base 3. The top cover 1 is detachably fixed to the mounting base 3 to enclose the electronic unit 2 inside the mounting base 3.

[0056] By using the top cover 1 and the fixing base 3, the electronic unit 2 can be completely enclosed to provide good protection for the electronic unit 2 and other components.

[0057] The upper cover 1 has an internal thread on its inner wall and an external thread on its outer wall. The upper cover 1 is threadedly connected to the fixed seat, thus achieving a closed installation of the upper cover 1. At the same time, the fixed seat 3 has an internal thread at the end that connects to the connector tube 4, while the corresponding side of the connector tube 4 has an external thread, so that the fixed seat 3 can be threadedly connected to the connector tube 4 for subsequent installation and disassembly.

[0058] In some embodiments, the guided wave radar probe further includes an insulating and sealing connector 8, which is disposed between the welding base 7 and the clamping member 10. Specifically, the insulating and sealing connector 8 includes a sealing tube 81 and a fixing ring 82, the fixing ring 82 being fixedly connected to the sealing tube 81, and the central rod 5 passing through the sealing tube 81 and the fixing ring 82. A snap-fit ​​groove 101 is provided in the clamping member 10, and the fixing ring 82 snaps into the snap-fit ​​groove 101.

[0059] Thus, this sealing connector can form a good seal between the center rod 5, the welding base 7, and the clamping member 10, and also provides good guidance and protection for the center rod 5. At the same time, after the fixing ring 82 is placed in the snap-fit ​​groove 101, it can form a good limit, making the guiding effect better.

[0060] The aforementioned guided wave radar probe also includes an insulating positioning sleeve 9, which is sleeved onto the central rod 5, and the outer wall of the insulating positioning sleeve 9 is attached to the outer wall of the clamping member 10, so that the positioning sleeve is pressed onto the central rod 5 by the clamping member 10.

[0061] By using the insulating positioning sleeve 9, electrical conductivity between the center rod 5 and the clamping member 10 can be avoided, and the center rod 5 can also be given a positioning guide function.

[0062] The aforementioned guided wave radar probe also includes an insulating sleeve 6, which is sleeved onto the upper end of the central rod 5. In addition, a pressing groove 71 is provided on the welding base 7, the insulating sleeve 6 is disposed in the pressing groove 71, and the inner wall of the pressing groove 71 is pressed against the outer wall of the insulating sleeve 6.

[0063] By using the clamping groove 71 and pressing the insulating sleeve 6 to the upper end of the center rod 5, insulation between the center rod 5 and the welding base 7 can be achieved, avoiding electrical conductivity and improving the safety of the probe.

[0064] In summary, when installing this guided wave radar probe, the second graphite gasket 16 can be placed into the annular groove 142 of the ground connection kit 14 first, and the sealing and anti-corrosion block 13 can be placed into the positioning ring groove 141. Then, the first graphite gasket 15 can be placed into the receiving groove 132 of the sealing and anti-corrosion block 13 and made to abut against the outer edge 121 of the center extension rod 12. Then, the insulating clamping block 11 can be installed on the other side of the outer edge 121. At this time, the clamping member 10 can be screwed into the ground connection kit 14 to press it onto the insulating clamping block 11, so that the second graphite, the sealing and anti-corrosion block 13, the first graphite gasket 15 and the insulating clamping block 11 are all pressed and sealed. Next, attach the insulating positioning sleeve 9 and the insulating sealing connector 8 to the center rod 5, and place them in the clamping member 10 in sequence. Weld the sealing connector and the clamping member 10 together, and weld one end of the welding base 7 to the clamping member 10. Then attach the insulating sleeve 6 to the upper end of the center rod 5. After that, thread the connector tube 4 and the welding base 7 together so that one end of the connector tube 4 is pressed onto the insulating sleeve 6. Finally, connect the fixing seat 3 to the connector tube 4 and place the electronic unit 2 inside the fixing seat 3 so that it is electrically connected to the center rod 5. Then install the top cover 1 to complete the installation of this probe.

[0065] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0066] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0067] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A guided wave radar probe for measuring the level of urea solution, characterized in that, include: Electronic unit; The central rod has one end electrically connected to the electronic unit and the other end connected to a central extension rod, the end of which is provided with an outer edge. A ground connection kit is disposed outside the central extension rod for connection with an external structure, and a positioning ring groove is provided inside the ground connection kit; A sealing and anti-corrosion block is fitted onto the central extension rod, the sealing and anti-corrosion block extends into the positioning ring groove, and the outer edge is pressed onto the sealing and anti-corrosion block; An insulating clamping block is disposed between the central rod and the central extension rod, with one end of the insulating clamping block pressed against the outer edge portion; An external kit is disposed outside the center rod, with one end of the external kit pressed against the insulating clamping block.

2. The guided wave radar probe for measuring the level of urea solution according to claim 1, characterized in that, The sealing and corrosion-resistant block is made of quartz glass.

3. The guided wave radar probe for measuring the level of urea solution according to claim 1, characterized in that, The sealing and anti-corrosion block is provided with a limiting groove, and at least a portion of the outer edge is engaged with the limiting groove.

4. The guided wave radar probe for measuring the level of urea solution according to claim 3, characterized in that, The guided wave radar probe also includes a first graphite pad; The sealing and anti-corrosion block is provided with a receiving groove, the cross-sectional area of ​​which is smaller than that of the limiting groove. The first graphite gasket is disposed in the receiving groove and is pressed against the outer edge.

5. The guided wave radar probe for measuring the level of urea solution according to claim 4, characterized in that, The guided wave radar probe also includes a second graphite pad; The ground connection kit has an annular groove, the second graphite gasket is disposed in the annular groove, and the second graphite gasket abuts against the sealing and anti-corrosion block.

6. The guided wave radar probe for measuring the level of urea solution according to claim 1, characterized in that, The external kit includes: A connector tube is disposed at the connection between the electronic unit and the central rod; A clamping element is fitted onto the outside of the center rod, with one end of the clamping element threaded into the ground connection kit and pressed against the insulating clamping block; A welding base is fitted onto the outside of the central rod. One end of the welding base is connected to the clamping member, and the other end is connected to the connector tube.

7. The guided wave radar probe for measuring the level of urea solution according to claim 6, characterized in that, The guided wave radar probe also includes an insulating and sealing connector, which is disposed between the welding base and the clamping member; The insulating sealing connector includes a sealing tube and a fixing ring, the fixing ring being fixed to the sealing tube, and the central rod passing through the sealing tube and the fixing ring. The clamping component is provided with a snap-fit ​​groove, and the fixing ring is snapped into the snap-fit ​​groove.

8. The guided wave radar probe for measuring the level of urea solution according to claim 7, characterized in that, The guided wave radar probe also includes an insulating positioning sleeve, which is sleeved onto the central rod. The outer wall of the insulating positioning sleeve is attached to the outer wall of the clamping member so that the insulating positioning sleeve is pressed onto the central rod by the clamping member.

9. The guided wave radar probe for measuring the level of urea solution according to claim 8, characterized in that, The guided wave radar probe also includes an insulating sleeve, which is sleeved onto the upper end of the central rod; The welding base is provided with a pressing groove, the insulating sleeve is disposed in the pressing groove, and the inner wall of the pressing groove is pressed against the outer wall of the insulating sleeve.

10. The guided wave radar probe for measuring the level of urea solution according to claim 9, characterized in that, The guided wave radar probe also includes: A mounting base is detachably connected to the connector tube, and the electronic unit is disposed within the mounting base; The top cover is detachably fixed to the mounting base to enclose the electronic unit within the mounting base.

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