Explosion-proof high-frequency radar liquid level meter

Abstract

The utility model discloses an anti-explosion high-frequency radar liquid level meter, and relates to the technical field of radar liquid level meters. The liquid level meter comprises a liquid level meter body, a transparent anti-explosion shell, a mounting disc, a sealing assembly and a mounting bolt, the liquid level meter body comprises a radar probe, a first connecting column and a second connecting column, the transparent anti-explosion shell is fixed to the upper portion of the peripheral side of the second connecting column, and an air nozzle is fixedly communicated with the center of the top of the transparent anti-explosion shell; a barometer is fixed to the top of the transparent explosion-proof shell on one side of the air tap in a penetrating mode, a sealing assembly is movably connected to the lower portion of the peripheral side of the first connecting column, a mounting disc is fixed to the lower portion of the peripheral side of the second connecting column, and mounting bolts are inserted into the mounting disc in an annular array in a penetrating mode. Through the arrangement of the liquid level meter main body, the transparent explosion-proof shell, the mounting disc, the sealing assembly and the mounting bolt, the problems that the safety is not good enough when a display is tested in the maintenance of the radar liquid level meter, and the mounting sealing effect is easily influenced due to the looseness of the mounting bolt and the deformation of a sealing structure are solved.

Description

Technical Field

[0001] This utility model belongs to the field of radar level gauge technology, and in particular relates to an explosion-proof high-frequency radar level gauge. Background Technology

[0002] A radar level gauge is a measuring instrument based on the time-of-flight principle. It emits high-frequency microwave pulses, which are reflected back when they encounter the material surface and received by a receiver inside the instrument. The distance signal is then converted into a level signal. Radar waves travel at the speed of light, and the travel time can be converted into a level signal by electronic components. While radar level gauges are based on the time-of-flight principle, they still have the following drawbacks in practical use:

[0003] 1. During operation, radar level gauges may be exposed to flammable and explosive gases, so they need to be protected by an explosion-proof enclosure. During long-term operation, the display needs to be maintained and tested after maintenance. If an electric arc is generated during the operation of the display, it can easily ignite the flammable and explosive gases, causing a fire hazard. The safety of maintaining the display is not high enough.

[0004] 2. During operation, the radar level gauge directly installs the sealing structure onto the container being measured. As the container operates, the sealing structure is subjected to pressure and deformation over a long period of time, and the mounting bolts may loosen, which can easily cause the sealing pressure to drop rapidly, affecting the sealing effect. Utility Model Content

[0005] The purpose of this utility model is to provide an explosion-proof high-frequency radar level gauge. By setting up a level gauge body, a transparent explosion-proof shell, a mounting plate, a sealing component, and mounting bolts, it solves the problems of insufficient safety when testing the display during radar level gauge maintenance, and the sealing effect being easily affected by loose mounting bolts and deformation of the sealing structure.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to an explosion-proof high-frequency radar level gauge, comprising a level gauge body, a transparent explosion-proof shell, a mounting plate, a sealing assembly, and mounting bolts. The level gauge body includes a radar probe, a first connecting column, and a second connecting column. The top of the radar probe is fixed to the first connecting column, and the top of the first connecting column is fixed to the second connecting column. A transparent explosion-proof shell is fixed to the upper part of the periphery of the second connecting column. An air nozzle is fixedly connected to the center of the top of the transparent explosion-proof shell. A pressure gauge is fixedly installed through the top of the transparent explosion-proof shell on one side of the air nozzle. A sealing assembly is movably connected to the lower periphery of the first connecting column. The component, the sealing component, includes a fixed cylinder and a flared mouth. The bottom end of the fixed cylinder is fixed with the flared mouth. The lower part of the periphery of the second connecting column is fixed with a mounting plate. The mounting plate has mounting bolts inserted in a ring array. During operation, the height of the installed container is detected by the radar probe included in the liquid level gauge body. The display is placed in the transparent explosion-proof shell to protect the display. The liquid level gauge body is installed through the mounting plate. The sealing component seals the radar probe and the container being measured. The mounting bolts are used to cooperate with the mounting plate for installation.

[0008] Furthermore, the liquid level gauge body also includes a display. The top of the connecting column two is fixed with a display. When the radar probe is working, the liquid level height in the container being measured is displayed on the display.

[0009] Furthermore, a back plate is provided on the back of the transparent explosion-proof shell, and fastening bolts are inserted through the four corners of the back plate. The fastening bolts are threaded to the rear of the transparent explosion-proof shell. The display is placed inside the transparent explosion-proof shell, which provides good protection for the display. The back plate is installed inside the transparent explosion-proof shell by inserting the fastening bolts into the back plate and screwing them into the transparent explosion-proof shell.

[0010] Furthermore, a second fixing port is vertically opened through the mounting plate, and the second connecting column is fixed through the fixing port. The mounting plate on the outside of the second connecting column has mounting holes arranged in a ring array. Each mounting hole is inserted through a mounting bolt. The mounting plate fixes the second connecting column through the fixing port and movably connects the mounting bolt through the mounting holes.

[0011] Furthermore, the sealing assembly also includes a movable sleeve and a sealing ring. The movable sleeve is fixed on the inner wall of the fixed cylinder, and the sealing ring is fixed at the bottom of the flared mouth. The movable sleeve is movably connected to the connecting column, and the sealing ring seals the gap between the flared mouth and the container being tested.

[0012] Furthermore, the sealing assembly also includes a sealing sleeve, which is fixed on the inner wall of the movable sleeve. The first connecting post is shaped like an inverted frustum, and the sealing sleeve is fitted around the periphery of the first connecting post. The sealing assembly seals the gap between the movable sleeve and the first connecting post by combining with the first connecting post through the sealing sleeve.

[0013] Furthermore, a movable plate is movably connected to the upper periphery of the screw portion of the mounting bolt. The top of the movable plate abuts against the bottom end of the bolt head of the mounting bolt. A compression spring is fixed to the bottom end of the movable plate. The compression spring is located on the outside of the screw portion of the mounting bolt, and the bottom end of the compression spring abuts against the top of the mounting plate. After installation, the mounting bolt, connected to the compression spring by the movable plate, continuously provides downward pressure compensation to ensure the sealing effect of the sealing assembly.

[0014] This utility model has the following beneficial effects:

[0015] 1. This utility model solves the problem of insufficient safety when testing the display during the maintenance of radar level gauges by setting up a liquid level gauge body and a transparent explosion-proof shell. When it is necessary to maintain the display inside the transparent explosion-proof shell, first connect the connector of the external flame-retardant gas pipeline to the gas nozzle, and then introduce inert gas into the transparent explosion-proof shell until the pressure gauge shows that the pressure is higher than the current external pressure. Then, remove the fastening bolts and take off the back plate. At this time, the inert gas enters the transparent explosion-proof shell through the gas nozzle and is discharged through the open position of the back plate, maintaining the inert gas atmosphere in the transparent explosion-proof shell. This reduces the impact of the electric arc generated by the display during operation when the back plate of the transparent explosion-proof shell is opened on the external environment, making the maintenance of radar level gauges safer.

[0016] 2. This utility model solves the problem that the sealing effect of radar level gauges is easily affected by loose mounting bolts and deformation of the sealing structure by setting up a level gauge body, mounting plate, sealing component and mounting bolts. When the mounting bolts become loose after long-term use and the sealing component structure deforms and the sealing pressure is insufficient, the compression spring and the mounting plate press against each other to compensate for the sealing pressure of the sealing component. This reduces the sealing effect lost due to deformation of the sealing component and the poor sealing caused by loose mounting bolts, and better maintains the sealing between the level gauge body and the installation position of the measured container. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A three-dimensional view of the rear-view assembly structure of an explosion-proof high-frequency radar level gauge;

[0019] Figure 2 This is a three-dimensional view of the main structure of the level gauge;

[0020] Figure 3A three-dimensional view of the rear structure of the transparent explosion-proof shell;

[0021] Figure 4 A top-down view of the mounting plate structure;

[0022] Figure 5 A top-down structural perspective view of the sealing assembly;

[0023] Figure 6 This is a 3D view of the installation bolt structure.

[0024] Figure label:

[0025] 1. Level gauge body; 101. Radar probe; 102. Connecting column one; 103. Connecting column two; 104. Display; 2. Transparent explosion-proof shell; 201. Back plate; 202. Fastening bolt; 203. Air nozzle; 204. Pressure gauge; 3. Mounting plate; 301. Fixing port two; 302. Mounting hole; 4. Sealing assembly; 401. Movable sleeve; 402. Sealing sleeve; 403. Fixing cylinder; 404. Flared mouth; 405. Sealing ring; 5. Mounting bolt; 501. Movable plate; 502. Compression spring. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. Specific Implementation Example 1

[0028] Please see Figure 1-5This utility model is an explosion-proof high-frequency radar level gauge, including a level gauge body 1, a transparent explosion-proof shell 2, a mounting plate 3, a sealing assembly 4, and mounting bolts 5. The level gauge body 1 includes a radar probe 101, a first connecting post 102, and a second connecting post 103. The top of the radar probe 101 is fixed with the first connecting post 102. The radar probe 101 detects the liquid level in the container. The radar probe 101 is connected to the second connecting post 103 through the first connecting post 102. The top of the first connecting post 102 is fixed with the second connecting post 103, which connects to a display 104. The upper part of the periphery of the second connecting post 103 is fixed with the transparent explosion-proof shell 2, which protects the display 104. An air nozzle 203 is fixedly connected to the center of the top of the transparent explosion-proof shell 2. A pressure gauge is fixedly fixed through the top of the transparent explosion-proof shell 2 on one side of the air nozzle 203. 204. The transparent explosion-proof housing 2 is connected to the pipeline connector for conveying inert protective gas via the gas nozzle 203, allowing inert gas to be introduced into the transparent explosion-proof housing 2. The pressure in the transparent explosion-proof housing 2 is displayed by the pressure gauge 204. A sealing assembly 4 is movably connected to the lower periphery of the connecting column 102. When the sealing assembly 4 is working, it seals the radar probe 101 inside the container. The sealing assembly 4 includes a fixed cylinder 403 and a flared mouth 404. The bottom end of the fixed cylinder 403 is fixed with the flared mouth 404. When the flared mouth 404 is working, it fixes the sealing ring 405 to its bottom end. A mounting plate 3 is fixed to the lower periphery of the connecting column 2 103. The liquid level gauge body 1 is installed through the mounting plate 3. The mounting plate 3 has mounting bolts 5 inserted in a ring array inside it. The mounting plate 3 is installed with the container being measured through the mounting bolts 5.

[0029] Specifically, the liquid level gauge body 1 also includes a display 104. The display 104 is fixed to the top of the connecting column 2 103. When the connecting column 2 103 is working, the liquid level height is displayed through the display 104.

[0030] Furthermore, a back plate 201 is provided on the back of the transparent explosion-proof shell 2. Fastening bolts 202 are inserted through the four corners of the back plate 201. The fastening bolts 202 are threaded to the rear of the transparent explosion-proof shell 2. The display 104 is set inside the transparent explosion-proof shell 2, so that the display 104 is placed inside and protected when working. By attaching the back plate 201 to the rear of the transparent explosion-proof shell 2, inserting the fastening bolts 202 into the back plate 201, and screwing them into the transparent explosion-proof shell 2 and tightening them, the back plate 201 is installed on the transparent explosion-proof shell 2.

[0031] Furthermore, a fixing port 301 is vertically opened through the mounting plate 3, and a connecting column 103 is fixed through the fixing port 301. The mounting plate 3 outside the connecting column 103 has mounting holes 302 arranged in a ring array. Each mounting hole 302 is inserted through and a mounting bolt 5 is inserted. When the mounting plate 3 is working, it is fixed to the connecting column 103 through the fixing port 301, and the mounting bolt 5 is movably connected through the mounting holes 302.

[0032] Furthermore, the sealing assembly 4 also includes a movable sleeve 401 and a sealing ring 405. The movable sleeve 401 is fixed on the inner wall of the fixed cylinder 403, and the sealing ring 405 is fixed at the bottom end of the flared mouth 404. When the sealing assembly 4 is working, the movable sleeve 401 connects to the sealing sleeve 402, and the sealing ring 405 at the bottom end of the flared mouth 404 abuts against the top of the installed container, so that the radar probe 101 is sealed inside the container.

[0033] Furthermore, the sealing assembly 4 also includes a sealing sleeve 402. The sealing sleeve 402 is fixed on the inner wall of the movable sleeve 401. The connecting column 102 is arranged in the shape of an inverted frustum. The sealing sleeve 402 is sleeved on the periphery of the connecting column 102. When the sealing assembly 4 is working, the sealing sleeve 402 is sleeved on the periphery of the connecting column 102. After being subjected to compression force, the gap between the connecting column 102 and the movable sleeve 401 is sealed.

[0034] The operation process of this embodiment is as follows: During operation, the radar probe 101 included in the liquid level gauge body 1 is inserted into the container being measured, and then installed through the mounting plate 3. Operation can then begin. Upon startup, the liquid level information detected by the radar probe 101 is transmitted to the display 104, showing the liquid level in the container. Simultaneously, the display 104 is protected by the transparent explosion-proof housing 2 to prevent damage. When maintenance of the display 104 inside the transparent explosion-proof housing 2 is required, first connect the connector of the external flame-retardant gas pipeline to the gas nozzle 203, then introduce inert gas into the transparent explosion-proof housing 2 until the pressure gauge 204 shows a pressure higher than the current external pressure. Then, remove the fastening bolts 202 and remove the back plate 201. At this time, the inert gas enters the transparent explosion-proof housing 2 through the gas nozzle 203 and exits through the open position of the back plate 201, maintaining the inert gas atmosphere in the transparent explosion-proof housing 2 and reducing the impact of the electric arc generated by the display 104 during operation when the back plate 201 of the transparent explosion-proof housing 2 is opened on the external environment. Specific Implementation Example 2

[0036] Please see Figure 1 , 45, 6. Based on the specific embodiment one, a movable piece 501 is movably connected to the upper part of the screw portion of the mounting bolt 5. The top of the movable piece 501 is abutted against the bottom end of the bolt head of the mounting bolt 5. A compression spring 502 is fixed to the bottom end of the movable piece 501. The compression spring 502 is located on the outside of the screw portion of the mounting bolt 5. The bottom end of the compression spring 502 abuts against the top end of the mounting plate 3. The compression spring 502 and the movable piece 501 are fitted onto the mounting bolt 5, and the movable piece 501 abuts against the bottom end of the bolt head of the mounting bolt 5. They are inserted into the mounting hole 302 on the mounting plate 3 to cooperate in the installation between the mounting plate 3 and the container under test.

[0037] The operation process of this embodiment is as follows: During operation, when installing the liquid level gauge body 1, firstly, the radar probe 101 is inserted into the container being measured, and then the flared end 404 is positioned downwards on the top of the container. Then, the compression spring 502 and the movable piece 501 are fitted onto the mounting bolt 5, with the movable piece 501 abutting against the bottom end of the bolt head. Next, it is inserted into the mounting hole 302 on the mounting plate 3 and screwed into the top of the container being measured. At this time, the sealing ring 405 at the bottom end of the flared end 404 of the sealing assembly 4 abuts against the top of the container being measured, simultaneously pushing the movable sleeve 401 and the sealing sleeve 402 upwards on the connecting column 102, so that... The gaps between the connecting column 102 and the movable sleeve 401, and between the flared mouth 404 and the container being measured, are fully sealed, so that when the radar probe 101 is sealed in the container being measured during operation, the gas evaporated from the liquid contained in the container will not leak. When the mounting bolt 5 loosens due to long-term use, or the sealing component 4 deforms and the sealing pressure is insufficient, the compression spring 502 abuts against the mounting plate 3 to compensate for the sealing pressure of the sealing component 4, reducing the sealing effect lost due to the deformation of the sealing component 4 and the poor sealing caused by the loose mounting bolt 5, thus better maintaining the sealing between the liquid level gauge body 1 and the installation position of the container being measured.

[0038] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An explosion-proof high-frequency radar level gauge comprising a level gauge body (1), a transparent explosion-proof housing (2), a mounting disc (3), a sealing assembly (4) and mounting bolts (5), characterized in that: The liquid level gauge body (1) comprises a radar probe (101), a connecting column one (102) and a connecting column two (103), the top end of the radar probe (101) is fixed with the connecting column one (102), the top end of the connecting column one (102) is fixed with the connecting column two (103), the upper part of the circumferential side of the connecting column two (103) is fixed with a transparent explosion-proof shell (2), the top center of the transparent explosion-proof shell (2) is fixed with a gas nozzle (203) in communication, the top of the transparent explosion-proof shell (2) on the side of the gas nozzle (203) is fixed with a barometer (204) in a penetrating manner, the lower part of the circumferential side of the connecting column one (102) is movably connected with a sealing assembly (4), the sealing assembly (4) comprises a fixed cylinder (403) and a horn mouth (404), the bottom end of the fixed cylinder (403) is fixed with the horn mouth (404), the lower part of the circumferential side of the connecting column two (103) is fixed with a mounting disc (3), the mounting disc (3) is in a ring array and is penetrated by mounting bolts (5) in a plug-in manner.

2. The explosion-proof high-frequency radar level gauge according to claim 1, characterized in that The liquid level gauge body (1) further comprises a display (104), and the top end of the connecting column two (103) is fixed with the display (104).

3. A flameproof high frequency radar level gauge according to claim 2, characterized in that The back of the transparent explosion-proof shell (2) is provided with a back plate (201), four corners in the back plate (201) are penetrated and plugged with fastening bolts (202), the fastening bolts (202) are threadedly connected to the rear part of the transparent explosion-proof shell (2), and the display (104) is arranged in the transparent explosion-proof shell (2).

4. The explosion-proof high-frequency radar level gauge according to claim 1, characterized in that: A fixed opening two (301) is vertically and penetratingly arranged in the mounting disc (3), the connecting column two (103) is penetratingly fixed in the fixed opening two (301), and mounting holes (302) are arranged in a ring array in the mounting disc (3) on the outer side of the connecting column two (103), and each mounting hole (302) is penetratingly plugged with a mounting bolt (5).

5. The explosion-proof high-frequency radar level gauge according to claim 1, characterized in that: The sealing assembly (4) further comprises a movable sleeve (401) and a sealing ring (405), the inner wall of the fixed cylinder (403) is fixed with the movable sleeve (401), and the bottom end of the horn mouth (404) is fixed with the sealing ring (405).

6. A flameproof high frequency radar level gauge according to claim 5, characterized in that The sealing assembly (4) further comprises a sealing sleeve (402), the inner wall of the movable sleeve (401) is fixed with the sealing sleeve (402), the connecting column one (102) is arranged in an inverted circular table, and the sealing sleeve (402) is sleeved on the circumferential side of the connecting column one (102).

7. The explosion-proof high-frequency radar level gauge according to claim 1, characterized in that: The outer side of the screw rod part of the mounting bolt (5) is movably connected with a movable piece (501), the top end of the movable piece (501) abuts against the bottom end of the screw head of the mounting bolt (5), the bottom end of the movable piece (501) is fixed with a compression spring (502), the compression spring (502) is arranged on the outer side of the screw rod part of the mounting bolt (5), and the bottom end of the compression spring (502) abuts against the top end of the mounting disc (3).

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