Adjustable probe of radar liquid level meter

Abstract

The utility model discloses an adjustable probe of a radar liquid level meter, which comprises a probe antenna, the probe antenna is arranged at the bottom of a radar liquid level meter seat, a fixing component is sleeved on the outer side of the probe antenna, an external thread sleeve is sleeved on the outer side of the probe antenna, and a lifting component is sleeved on the outer side of the external thread sleeve and located at the top of the fixing component. The lifting component comprises a limiting block arranged on the outer side of the outer threaded sleeve in a sleeving mode, the outer side of the outer threaded sleeve is sleeved with an inner threaded sleeve, and a rotating part is arranged on the outer side of the inner threaded sleeve. According to the utility model, the outer side of the probe antenna is sleeved with the external thread sleeve, and the rotating part in the lifting component at the top of the fixing component drives the internal thread sleeve which sleeves the outer side of the external thread sleeve in a threaded manner to rotate, so that the external thread sleeve is driven to move in the vertical direction; therefore, the telescopic length of the probe antenna is adjusted according to the change of the liquid level in the normal-pressure storage tank to ensure that electromagnetic waves can be in direct contact with the liquid surface, so that the liquid level is accurately measured.

Description

Technical Field

[0001] The utility model relates to the field of liquid level detection equipment, in particular to an adjustable probe of a radar liquid level meter. Background Art

[0002] Guided wave radar level meter is a type of radar level meter. It works based on the principle of time domain reflection. It measures the material level by transmitting electromagnetic pulses along the guided wave probe rod or cable probe. When the pulse encounters the surface of the medium, part of the pulse is reflected and returned to the pulse transmitter, so as to calculate the material level. Unlike ordinary non-contact radar level meter, the guided wave radar level meter probe needs to be directly extended into the measured medium in order to accurately measure the liquid level. In the production and use of existing normal pressure liquid storage tanks, the length of the guided wave probe rod is fixed, and the liquid level will change, which will cause the probe rod to detach from the liquid surface, affecting the guided wave radar level meter's accurate detection of the liquid level. In order to solve the problem of the non-adjustable length of the probe rod, a new type of adjustable probe for radar level meter is needed. Utility Model Content

[0003] The utility model aims to provide an adjustable probe of a radar level meter to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an adjustable probe of a radar level gauge, comprising a probe antenna, which is arranged at the bottom of a radar level gauge seat, and the outer side of the probe antenna is sleeved with a fixing component for fixing the radar level gauge, and the outer side of the probe antenna is sleeved with an externally threaded sleeve, and the outer side of the externally threaded sleeve and located on the top of the fixing component are sleeved with a lifting component for driving the externally threaded sleeve to move, and the lifting component comprises a limit block sleeved on the outer side of the externally threaded sleeve, and the outer side of the externally threaded sleeve is sleeved with an internally threaded sleeve, and the outer side of the internally threaded sleeve is provided with a rotating part.

[0005] Preferably, the rotating part comprises a worm wheel sleeved on the outside of the internal threaded sleeve, the side of the worm wheel is meshingly connected with a worm, and one end of the worm is fixedly connected with a hexagonal socket block.

[0006] Preferably, the inner cavity of the limit block is provided with a rotation groove for accommodating the worm wheel, the ends of the worm are inserted and connected to the inner wall of the rotation groove, and the hexagonal groove block is arranged on the outer side of the limit block.

[0007] Preferably, a bearing is provided at the intersection between the other end of the worm and the inner wall of the rotating groove.

[0008] Preferably, the fixing member comprises a fixing plate, and the top of the fixing plate is fixedly connected to the bottom of the limiting block.

[0009] Preferably, a plurality of fixing holes are formed on the top of the fixing plate.

[0010] Technical effects and advantages of the utility model:

[0011] The utility model arranges an external threaded sleeve on the outer side of the probe antenna, and drives the internal threaded sleeve threaded on the outer side of the external threaded sleeve to rotate through the rotating part in the lifting component on the top of the fixed component, thereby driving the external threaded sleeve to move in the vertical direction, so as to adjust the telescopic length of the probe antenna according to the change of the liquid level in the normal pressure storage tank, ensure that the electromagnetic wave can directly contact the liquid surface, and thus accurately measure the liquid level. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0013] Figure 2 It is a cross-sectional view of the lifting component of the utility model.

[0014] Figure 3 It is a structural schematic diagram of the internal threaded casing of the utility model.

[0015] In the figure: 1, probe antenna; 2, external threaded sleeve; 3, fixed plate; 301, fixing hole; 4, lifting member; 401, limit block; 4011, rotating groove; 402, internal threaded sleeve; 403, worm wheel; 404, worm; 405, hexagonal slot block; 406, bearing. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] The utility model provides Figure 1-3 The adjustable probe of a radar level gauge shown includes a probe antenna 1, which is arranged at the bottom of the radar level gauge seat;

[0018] It should be noted that the probe antenna 1 and the radar level meter base constitute the working principle of the overall reference model HDK-RD600 guided wave radar level meter. Unlike ordinary non-contact radar level meters, the probe antenna 1 of the guided wave radar level meter needs to be directly extended into the measured medium in order to accurately measure the level;

[0019] The outer side of the probe antenna 1 is provided with a fixing member for fixing the radar level meter;

[0020] Specifically, the fixing member includes a fixing plate 3 , and a plurality of fixing holes 301 are formed on the top of the fixing plate 3 . Bolts can be inserted into the fixing holes 301 to fix the positions of the fixing plate 3 and the normal pressure liquid storage tank.

[0021] An external threaded sleeve 2 is sleeved on the outside of the probe antenna 1, and a lifting member 4 for driving the external threaded sleeve 2 to move is sleeved on the outside of the external threaded sleeve 2 and located on the top of the fixed member. The lifting member 4 includes a limit block 401 sleeved on the outside of the external threaded sleeve 2;

[0022] It should be noted that the fixed plate 3 and the limit block 401 are both made of aluminum alloy, the top of the fixed plate 3 is fixedly connected to the bottom of the limit block 401, the fixed plate 3 and the limit block 401 are fixed by welding, the external threaded sleeve 2 is welded and fixed to the bottom of the radar level gauge seat, and there is a gap between the inner wall of the external threaded sleeve 2 and the top outer side of the probe antenna 1, and there is no contact;

[0023] Specifically, an internal threaded sleeve 402 is sleeved on the outer side of the external threaded sleeve 2, and a rotating part is arranged on the outer side of the internal threaded sleeve 402, and the rotating part includes a worm wheel 403 sleeved on the outer side of the internal threaded sleeve 402, and a worm 404 is meshedly connected to the side of the worm wheel 403, and one end of the worm 404 is fixedly connected to a hexagonal slot block 405;

[0024] It should be noted that the outer side of the internal threaded sleeve 402 is a smooth curved surface, which is welded and fixed to the inner wall of the worm wheel 403, the internal threaded sleeve 402 is meshed with the thread of the external threaded sleeve 2, and the connection between the worm 404 and the worm wheel 403 is provided with a thread, and the rest of the parts are smooth curved surfaces. The inner cavity of the limit block 401 is provided with a rotating groove 4011 for placing the worm wheel 403, and the ends of the worm 404 are inserted and connected to the inner wall of the rotating groove 4011. The cross-sectional diameter of one end of the worm 404 is smaller than the cross-sectional area of ​​the other end. The inner wall of the rotating groove 4011 is provided with a cylindrical hole for inserting one end of the worm 404, and the cross-sectional diameter of the cylindrical hole is smaller than the cross-sectional diameter of the other end of the worm 404, and larger than the cross-sectional diameter of one end of the worm 404, so that the worm 404 cannot escape from the rotating groove 4011;

[0025] Specifically, the hexagonal slot block 405 is arranged on the outer side of the limit block 401, so that the user can use a tool to rotate the hexagonal slot block 405, thereby driving the worm 404 to rotate. A bearing 406 is arranged at the insertion point between the other end of the worm 404 and the inner wall of the rotating groove 4011. The other end of the worm 404 is welded and fixed to the middle part of the bearing 406. A circular hole for the insertion of the bearing 406 is opened on the inner wall of the rotating groove 4011. The inner wall of the circular hole is welded and fixed to the outer side of the bearing 406, thereby limiting the position of the worm 404 and preventing the meshing point between the worm 404 and the worm wheel 403 from being offset.

[0026] During actual use, when the liquid level of the atmospheric water storage tank changes, the probe antenna 1 is separated from the liquid surface. The user rotates the hexagonal slot block 405 with a tool to drive the worm 404 to rotate. The worm 404 drives the worm wheel 403 to rotate around the probe antenna 1 through meshing, thereby driving the internal threaded sleeve 402 welded to the worm wheel 403 to rotate. The rotating internal threaded sleeve 402 drives the external threaded sleeve 2 to move in the direction of contacting the liquid surface through the thread, so that the probe antenna 1 contacts the liquid surface. When the lead angle of the worm 404 is less than the equivalent friction angle between the teeth of the meshing worm wheel 403, the combination has self-locking properties, which prevents the probe antenna 1 from loosening at the meshing point between the worm wheel 403 and the worm 404 due to the liquid level adjustment, thereby affecting the liquid level measurement of the guided wave radar level meter.

[0027] This design can adjust the telescopic length of the probe antenna 1 according to the change of the liquid level in the normal pressure storage tank, thereby ensuring that the electromagnetic wave can directly contact the liquid surface, so that the user can accurately know the measured liquid level.

[0028] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An adjustable probe of a radar level gauge, comprising a probe antenna (1), wherein the probe antenna (1) is arranged at the bottom of a radar level gauge seat, and characterized in that: The outer side of the probe antenna (1) is sleeved with a fixing component for fixing the radar level gauge, the outer side of the probe antenna (1) is sleeved with an externally threaded sleeve (2), the outer side of the externally threaded sleeve (2) and located on the top of the fixing component is sleeved with a lifting component (4) for driving the externally threaded sleeve (2) to move, the lifting component (4) comprises a limit block (401) sleeved on the outer side of the externally threaded sleeve (2), the outer side of the externally threaded sleeve (2) is sleeved with an internally threaded sleeve (402), and the outer side of the internally threaded sleeve (402) is provided with a rotating portion.

2. The adjustable probe of radar level gauge according to claim 1, characterized in that: The rotating part comprises a worm wheel (403) sleeved on the outside of the internal threaded sleeve (402), the side of the worm wheel (403) is meshingly connected with a worm (404), and one end of the worm (404) is fixedly connected with a hexagonal slot block (405).

3. The adjustable probe of radar level gauge according to claim 2, characterized in that: The inner cavity of the limit block (401) is provided with a rotation groove (4011) for accommodating the worm wheel (403), the ends of the worm (404) are both inserted and connected to the inner wall of the rotation groove (4011), and the hexagonal groove block (405) is arranged on the outer side of the limit block (401).

4. The adjustable probe of radar level gauge according to claim 3, characterized in that: A bearing (406) is provided at the point where the other end of the worm (404) intersects with the inner wall of the rotating groove (4011).

5. The adjustable probe of radar level gauge according to claim 4, characterized in that: The fixing component comprises a fixing plate (3), the top of the fixing plate (3) being fixedly connected to the bottom of the limiting block (401).

6. The adjustable probe of radar level gauge according to claim 5, characterized in that: A plurality of fixing holes (301) are provided on the top of the fixing plate (3).

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