Ultrasonic liquid level meter signal fluctuation blocking device

Abstract

The utility model provides an ultrasonic wave liquid level meter signal fluctuation blocking device which comprises an ultrasonic wave liquid level meter, a liquid level meter fixing support, a sleeve and a sleeve fixing support, the ultrasonic wave liquid level meter is fixedly connected with the liquid level meter fixing support, and the liquid level meter fixing support is fixedly connected with the top end of the sleeve. The ultrasonic liquid level meter is fixed above the sleeve through a liquid level meter fixing bracket; a sleeve fixing support is further fixedly arranged on the sleeve, the sleeve fixing support is fixedly connected with the measured container, a through hole is formed in the measured container, and the sleeve penetrates through the through hole and is inserted into the measured container; the sleeve is further provided with an exhaust hole, and the exhaust hole is located among the sleeve fixing support, the liquid level and the floating object. According to the device provided by the utility model, condensation water generated on the surface of the probe due to temperature difference and humidity is effectively reduced, and the measurement stability of the probe in a closed environment is remarkably improved; violent fluctuation of a medium is buffered by utilizing a communicating pipe principle, so that the liquid level change in the sleeve is smoother, and signal jump caused by rapid fluctuation of the liquid level is effectively inhibited.

Description

Technical Field

[0001] This utility model belongs to the field of ultrasonic level gauge technology, specifically, it relates to an ultrasonic level gauge signal fluctuation blocking device. Background Technology

[0002] In the field of thermal power generation, ultrasonic level gauges are core monitoring devices for the start-stop interlocking control of pump units in the peripheral auxiliary systems of coal-fired power units. Their measurement stability is directly related to the safety of system operation. Taking the peripheral auxiliary system of a 2×660MW coal-fired power unit as an example, the system is equipped with more than 60 ultrasonic level gauges, covering various types of level monitoring scenarios. However, the existing technology has revealed the following significant defects in practical applications: 1. Some level gauges need to be installed in a completely sealed cuboid container. Due to the temperature difference and air humidity inside and outside the container, liquid water film easily condenses on the probe surface, resulting in a decrease in ultrasonic signal transmission / reception efficiency and abnormal fluctuations in the measured value; 2. When the measured medium contains floating matter (such as impurities, foam, etc.) or there are violent liquid level fluctuations, the non-uniform distribution of floating matter and the rapid undulation of the liquid surface will directly interfere with the accuracy of the ultrasonic echo signal, resulting in a significant deviation between the measured value and the actual liquid level. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides an ultrasonic level gauge signal fluctuation blocking device, which solves the problem that existing ultrasonic level gauges are prone to condensation of water and floating objects in confined spaces, as well as frequent signal jumps caused by severe liquid level fluctuations.

[0004] The present invention adopts the following technical solution.

[0005] An ultrasonic level gauge signal fluctuation blocking device includes an ultrasonic level gauge, a level gauge fixing bracket, a sleeve, and a sleeve fixing bracket. The ultrasonic level gauge is fixedly connected to the level gauge fixing bracket, and the level gauge fixing bracket is fixedly connected to the top end of the sleeve. The ultrasonic level gauge is fixed above the sleeve by the level gauge fixing bracket.

[0006] The sleeve is also fixedly equipped with a sleeve fixing bracket, which is fixedly connected to the container being tested. The container being tested has a through hole, through which the sleeve passes and is inserted into the container being tested. The sleeve is also provided with an exhaust hole, which is located between the sleeve fixing bracket and the liquid surface and floating objects.

[0007] Furthermore, the liquid level gauge fixing bracket includes an end cap and connecting pieces. The diameter of the end cap is not less than the diameter of the sleeve, and several connecting pieces are fixedly connected to the bottom of the end cap.

[0008] The connecting piece is provided with bolt holes, and the top of the sleeve is also provided with corresponding bolt holes. The connecting piece and the sleeve are connected by bolts.

[0009] Furthermore, the end cap has a threaded hole at its center, the ultrasonic level gauge is threadedly connected to the end cap, the ultrasonic level gauge probe extends into the sleeve, and there is a gap between the end cap and the top of the sleeve.

[0010] Furthermore, the sleeve fixing bracket includes a cover plate and a connector. The cover plate has an opening in the middle, the diameter of which is adapted to the diameter of the sleeve, and the sleeve passes through the opening. The cover plate has several bolt holes, and the cover plate is connected to the top of the container being tested by bolts.

[0011] The connector is an L-shaped plate. One end of the connector is connected to the bottom of the cover plate by bolts, and the other end of the connector is tightly attached to the outer wall of the sleeve and fixedly connected to the sleeve.

[0012] Furthermore, when the length of the sleeve above the sleeve fixing bracket is no more than 200mm, bolt holes are opened on the sleeve, and the connector is fixedly connected to the sleeve by bolts.

[0013] Furthermore, when the length of the sleeve above the sleeve fixing bracket is greater than 200mm and less than 1000mm, the connector and the sleeve are fixedly connected by a clamp.

[0014] Furthermore, the sleeve is made of PVC pipe with a diameter of φ200mm.

[0015] Furthermore, the vent hole is located 20-40mm below the sleeve fixing bracket, and the diameter of the vent hole is φ12mm-φ16mm.

[0016] Furthermore, the distance between the bottom end of the sleeve and the bottom of the container being tested is 100-120mm.

[0017] The beneficial effects of this utility model are as follows, compared with the prior art:

[0018] 1. This utility model, through the structural design of the sleeve extending a certain length above the top of the container being measured, allows the ultrasonic level gauge probe to be removed from the confined space. The semi-sealed state between the level gauge fixing bracket and the sleeve, as well as the ventilation design of the vent hole, effectively reduces the condensation on the probe surface caused by temperature difference and humidity, avoids interference of condensation on ultrasonic transmission / reception signals, and significantly improves the measurement stability of the probe in a confined environment.

[0019] 2. This utility model uses a sleeve as the core interference blocking component to block floating objects (such as impurities, foam, etc.) in the container being tested outside the sleeve, thus preventing them from directly interfering with the ultrasonic echo. During measurement, the signal fluctuation interference device and the container being tested form a connecting tube, and the liquid level change inside the sleeve is more gradual, effectively suppressing signal jumps caused by rapid fluctuations in the liquid surface. Attached Figure Description

[0020] Figure 1This is a schematic diagram of the structure of an ultrasonic level gauge signal fluctuation blocking device provided by this utility model;

[0021] Figure 2 This is a schematic diagram of the sleeve fixing bracket structure provided by this utility model;

[0022] Figure 3 This utility model provides the application of an ultrasonic level gauge signal fluctuation blocking device structure in an open-type cement structure pit.

[0023] Figure 4 This invention relates to the application of the ultrasonic level gauge signal fluctuation blocking device structure in a completely open seawater environment.

[0024] In the diagram: 1-Ultrasonic level gauge; 11-Ultrasonic level gauge probe; 2-Level gauge mounting bracket; 21-End cap; 22-Connecting piece; 3-Sleeve; 4-Sleeve mounting bracket; 41-Cover plate; 42-Connector; 5-Vent hole; 6-Container under test; 7-Liquid surface and floating objects. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The embodiments described in this application are merely some embodiments of this utility model, and not all embodiments. Based on the spirit of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] like Figure 1-2 As shown, an ultrasonic level gauge signal fluctuation blocking device includes an ultrasonic level gauge 1, a level gauge fixing bracket 2, a sleeve 3, and a sleeve fixing bracket 4. The ultrasonic level gauge 1 is fixedly connected to the level gauge fixing bracket 2, and the level gauge fixing bracket 2 is fixedly connected to the top end of the sleeve 3. The ultrasonic level gauge 1 is fixed above the sleeve 3 via the level gauge fixing bracket 2. The sleeve fixing bracket 4 is also fixedly mounted on the sleeve 3, with the level gauge fixing bracket 2 located above the sleeve fixing bracket 4. The sleeve fixing bracket 4 is fixedly connected to the container 6 under test. The container 6 under test has a through hole, and the sleeve 3 passes through the through hole and is inserted into the container 6 under test. The distance between the bottom end of the sleeve 3 and the bottom of the container 6 under test is 100-120mm. In this embodiment, the container 6 under test is a cubic steel plate structure. A vent hole 5 is provided on the sleeve 3. The vent hole 5 is located 20-40mm below the sleeve fixing bracket 4 and above the liquid surface and floating objects 7 in the container being tested 6. The diameter of the vent hole 5 is φ12mm-φ16mm. The sleeve 3 is made of PVC pipe with a diameter of φ200mm.

[0027] The level gauge mounting bracket 2 includes an end cap 21 and connecting pieces 22. The end cap 21 has a threaded hole at its center, and the ultrasonic level gauge 1 is threadedly connected to the end cap 21. The ultrasonic level gauge probe 11 extends into the sleeve 3. The diameter of the end cap 21 is not less than the diameter of the sleeve 3. Several connecting pieces 22 are fixedly connected to the bottom of the end cap 21, and each connecting piece 22 has bolt holes. Corresponding bolt holes are also provided at the top of the sleeve 3. The connecting pieces 22 and the sleeve 3 are connected by bolts. A gap exists between the end cap 21 and the top of the sleeve 3, thus the level gauge mounting bracket 2 and the sleeve 3 are in a semi-sealed state, which can prevent or slow down the formation of condensate on the ultrasonic level gauge probe 11.

[0028] The sleeve fixing bracket 4 includes a cover plate 41 and a connector 42. The cover plate 41 has an opening in the middle, the diameter of which is adapted to the diameter of the sleeve 3. The cover plate 41 has several bolt holes and is bolted to the top of the container 6 being tested. The connector 42 is an L-shaped plate. One end of the connector 42 is bolted to the bottom 41 of the cover plate, and the other end of the connector 42 is tightly attached to the outer wall of the sleeve 3 and fixedly connected to the sleeve 3. In some embodiments, when the length of the sleeve 3 above the sleeve fixing bracket 4 is no more than 200mm, bolt holes are provided on the sleeve 3, and the connector 42 is bolted to the sleeve 3. In other embodiments, when the length of the sleeve 3 above the sleeve fixing bracket 4 is greater than 200mm and less than 1000mm, the connector 42 is fixedly connected to the sleeve 3 by a clamp.

[0029] like Figure 3 As shown, this invention can also be applied to signal fluctuation blocking in open-type cement structure pits. The ultrasonic level gauge 1 extends 1000mm away from the top of the measuring pool through the extension of the sleeve 3, achieving waterproofing and flooding of the level gauge. Figure 4 As shown, this invention can also be applied to the interference of signal fluctuations in fully open seawater levels. The sleeve fixing bracket 4 is a channel steel structure with the flat side of the channel steel facing upwards. It has a hole in the middle that matches the sleeve 3. The sleeve 3 passes through the channel steel and is fixed with bolts. The sidewall of the open seawater is made of cement. A steel plate is directly fixed to the top of the cement pool wall using expansion bolts. The channel steel is welded to the steel plate, thus fixing the ultrasonic level gauge 1 above the seawater. The ultrasonic level gauge signal fluctuation interference device provided by this invention can meet the needs of different applications, and the materials and dimensions can be selected according to different environments.

[0030] During measurement, the measured medium rises from the bottom of the sleeve, while air is expelled through the vent hole on the sleeve. The sleeve forms a connecting tube within the measured container, isolating floating debris and mitigating fluctuations in the actual liquid level. The sleeve extends a certain length beyond the measured container, removing the ultrasonic level gauge probe from the confined space. The semi-sealed connection between the level gauge mounting bracket and the sleeve prevents condensation at the ultrasonic probe, thus achieving signal blocking. The ultrasonic level gauge transmits waves downwards along the sleeve for measurement. Because the sleeve isolates interference factors within the measured container, stable level gauge readings are ensured.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.

Claims

1. An ultrasonic liquid level meter signal fluctuation blocking device, comprising an ultrasonic liquid level meter (1), a liquid level meter fixing support (2), a sleeve (3) and a sleeve fixing support (4), characterized in that: the ultrasonic liquid level meter (1) is fixedly connected with the liquid level meter fixing support (2), the liquid level meter fixing support (2) is fixedly connected with the top end of the sleeve (3), and the ultrasonic liquid level meter (1) is fixed above the sleeve (3) through the liquid level meter fixing support (2); the sleeve (3) is further provided with the sleeve fixing support (4) fixedly arranged thereon, the sleeve fixing support (4) is fixedly connected with a measured container (6), the measured container (6) is provided with a through hole, the sleeve (3) penetrates through the through hole and is inserted into the measured container (6); the sleeve (3) is further provided with an exhaust hole (5) arranged thereon, and the exhaust hole (5) is located between the sleeve fixing support (4) and a liquid surface and floating matter (7).

2. The ultrasonic liquid level meter signal fluctuation blocking device according to claim 1, characterized in that: the liquid level meter fixing support (2) comprises an end cover (21) and a connecting piece (22), the diameter of the end cover (21) is not less than the diameter of the sleeve (3), and the bottom of the end cover (21) is fixedly connected with a plurality of connecting pieces (22); the connecting piece (22) is provided with a bolt hole, the top of the sleeve (3) is also provided with a corresponding bolt hole, and the connecting piece (22) and the sleeve (3) are connected through bolts.

3. The ultrasonic liquid level meter signal fluctuation blocking device according to claim 2, characterized in that: the center of the end cover (21) is provided with a threaded hole, the ultrasonic liquid level meter (1) is threadedly connected with the end cover (21), the ultrasonic liquid level meter probe (11) is inserted into the inside of the sleeve (3), and a gap is arranged between the end cover (21) and the top end of the sleeve (3).

4. The ultrasonic liquid level meter signal fluctuation blocking device according to claim 1, characterized in that: the sleeve fixing support (4) comprises a cover plate (41) and a connecting piece (42), the middle of the cover plate (41) is provided with an opening hole, the diameter of the opening hole is adapted to the diameter of the sleeve (3), and the sleeve (3) penetrates through the opening hole; the cover plate (41) is provided with a plurality of bolt holes, and the cover plate (41) is connected with the top of the measured container (6) through bolts; the connecting piece (42) is an L-shaped plate, one end of the connecting piece (42) is connected with the bottom of the cover plate (41) through bolts, and the other end of the connecting piece (42) is tightly attached to the outer wall of the sleeve (3) and is fixedly connected with the sleeve (3).

5. The ultrasonic liquid level meter signal fluctuation blocking device according to claim 4, characterized in that: when the length of the sleeve (3) above the sleeve fixing support (4) is not greater than 200 mm, bolt holes are arranged on the sleeve (3), and the connecting piece (42) is fixedly connected with the sleeve (3) through bolts.

6. The ultrasonic liquid level meter signal fluctuation blocking device according to claim 4, characterized in that: when the length of the sleeve (3) above the sleeve fixing support (4) is greater than 200 mm and less than 1000 mm, the connecting piece (42) is fixedly connected with the sleeve (3) through a clamp.

7. The ultrasonic liquid level meter signal fluctuation blocking device according to claim 1, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ ​ The sleeve pipe (3) is made of PVC pipe with a diameter of φ200mm.

8. The signal fluctuation blocking device of an ultrasonic liquid level meter according to claim 1, characterized in that: The exhaust hole (5) is located 20-40mm below the sleeve pipe fixing support (4), and the diameter of the exhaust hole (5) is φ12mm-φ16mm.

9. The signal fluctuation blocking device of an ultrasonic liquid level meter according to claim 1, characterized in that: The distance between the bottom end of the sleeve pipe (3) and the bottom of the measured container (6) is 100-120mm.

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