Ultrasonic liquid level meter

Abstract

The utility model relates to the technical field of liquid level meters, and discloses an ultrasonic liquid level meter which comprises a main shell and an anti-corrosion connector. A limiting table is arranged in the middle of the outer side wall of the anti-corrosion connector in a protruding mode and divides the anti-corrosion connector into a first pipe part and a second pipe part in the axial direction, the first pipe part is detachably connected to the main shell, and the second pipe part is used for being connected with a tank body. According to the ultrasonic liquid level meter, the manufacturing cost of the ultrasonic liquid level meter can be reduced on the basis of ensuring that the joint of the ultrasonic liquid level meter and the tank body is not easy to corrode.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid level meters, in particular to an ultrasonic liquid level meter. Background Art

[0002] Ultrasonic level meters are microprocessor-controlled digital level meters. Their operating principle is that a transducer emits an ultrasonic pulse, which is reflected by the surface of the measured medium. A portion of the reflected echo is received by the transducer and converted into an electrical signal by a piezoelectric crystal or magnetostrictive device. The time between the emission and reception of the sound wave is used to calculate the distance from the sensor to the measured liquid surface. Because it uses non-contact measurement, the measured medium is virtually unlimited, making it suitable for measuring the height of various liquids and solid materials.

[0003] When the existing ultrasonic level meter is connected to a tank containing corrosive liquid to measure the liquid level of volatile corrosive liquid, the connection between the ultrasonic level meter and the tank is easily corroded by the corrosive liquid in the tank, resulting in a shortened life of the ultrasonic level meter. In order to solve the above problem, some manufacturers completely replace the shell of the ultrasonic level meter with anti-corrosion material, but the cost is high. Therefore, there is an urgent need for an ultrasonic level meter that is corrosion-resistant and has a low cost. Utility Model Content

[0004] In view of this, the utility model provides an ultrasonic liquid level meter to solve the problem of lack of an ultrasonic liquid level meter that is corrosion-resistant and has low manufacturing cost.

[0005] The utility model provides an ultrasonic liquid level meter, comprising:

[0006] main housing;

[0007] The anti-corrosion connector has a limit platform protruding from the middle of the outer wall, which separates the anti-corrosion connector into a first tube part and a second tube part along the axial direction. The first tube part is detachably connected to the main shell, and the second tube part is used to connect to the tank body.

[0008] An ultrasonic liquid level meter according to the utility model has at least the following beneficial effects:

[0009] By setting the anti-corrosion connecting head and the main shell separately, and using anti-corrosion materials to make the anti-corrosion connecting head, and using conventional materials to make the main shell, the manufacturing cost of the ultrasonic liquid level meter is reduced while ensuring that the connection between the ultrasonic liquid level meter and the tank body is not easily corroded; at the same time, a limit platform is protruded from the middle part of the outer side of the anti-corrosion connecting head, and the limit platform plays a positioning role, so that there is sufficient contact and connection area between the first tube part and the main shell, and there is sufficient contact and connection area between the second tube part and the tank body, thereby ensuring the connection strength between the anti-corrosion connecting head and the main shell while ensuring the connection strength between the anti-corrosion connecting head and the tank body.

[0010] In an optional embodiment, the outer side wall of the first tube portion is provided with a first threaded portion, and the main shell is provided with a first internal threaded hole, and the first internal threaded hole matches the first threaded portion.

[0011] In an optional embodiment, the end of the main shell facing away from the anti-corrosion connector is detachably connected to a cover plate; the end of the first tube portion facing away from the limit platform is set as a mating section, and the end surface of the mating section facing away from the limit platform is provided with a plurality of snap-in grooves spaced circumferentially.

[0012] In an optional embodiment, the interior of the fitting section is configured as a tapered hole, and the diameter of the tapered hole gradually increases in a direction away from the limiting platform.

[0013] In an optional embodiment, a retaining ring groove is provided at the connection between the first threaded portion and the mating section of the first tube portion, and a shaft retaining ring is embedded in the retaining ring groove.

[0014] In an optional embodiment, the outer side wall of the second tube portion is provided with a second threaded portion, and the second threaded portion is used for threaded connection with the second internal threaded hole of the tank body.

[0015] In an optional embodiment, the outer wall of the second tube portion is provided with two clamping openings spaced apart along the circumferential direction, and the clamping openings extend axially from the end surface of the second tube portion facing away from the limit platform to an end of the second threaded portion facing the limit platform;

[0016] And / or, one end of the main shell facing the corrosion-resistant connector is configured as a connecting portion, and the connecting portion is configured in a hexagonal column shape.

[0017] In an optional embodiment, the first tube portion is provided with a first annular groove, the first annular groove is provided with a first sealing ring, and the first sealing ring abuts between the main housing and the limiting platform;

[0018] And / or, the second tube portion is provided with a second annular groove, the second annular groove is embedded with a second sealing ring, and the second sealing ring is used to abut between the limiting platform and the outer wall of the tank body.

[0019] In an optional embodiment, the main shell includes a main body and a connecting part, the first internal threaded hole is arranged in the connecting part, and an installation cavity is provided in the main body, and the installation cavity is communicated with the first internal threaded hole; the ultrasonic liquid level meter also includes a transducer body, the transducer body is connected to the first tube part, and the inner wall of the first tube part is provided with a limiting boss, and a third sealing ring is provided between the limiting boss and the transducer body.

[0020] In an optional embodiment, a third annular groove is recessed on the end surface of the limiting boss facing the transducer body, and one end of the third sealing ring facing the limiting boss is embedded in the third annular groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a schematic diagram of the main structure of an ultrasonic level meter in cross section according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the three-dimensional structure of an ultrasonic liquid level meter according to an embodiment of the present utility model;

[0024] Figure 3 This is a structural schematic diagram of an anti-corrosion connector in an ultrasonic level meter according to an embodiment of the present utility model.

[0025] Description of reference numerals:

[0026] 100-main housing, 110-main body, 111-installation cavity, 120-connecting part;

[0027] 200 - Anti-corrosion connector, 210 - Limiting platform, 220 - First pipe portion, 221 - First threaded portion, 222 - Fitting section, 2221 - Clamping groove, 2222 - Tapered hole, 223 - Retaining ring groove, 224 - First annular groove, 225 - Limiting boss, 230 - Second pipe portion, 231 - Second threaded portion, 232 - Clamping opening, 233 - Second annular groove;

[0028] 300-cover plate;

[0029] 410-shaft retaining ring, 420-first sealing ring, 430-second sealing ring, 440-third sealing ring;

[0030] 510- transducer body, 520- terminal block, 530- column, 540- partition plate, 550- wire tube, 551- wiring gland. DETAILED DESCRIPTION

[0031] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0032] In the description of this embodiment, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this embodiment and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this embodiment. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this embodiment, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this embodiment based on specific circumstances.

[0034] The following combination Figures 1 to 3 , describing the embodiments of the present utility model.

[0035] According to an embodiment of the present invention, an ultrasonic liquid level meter is provided, which includes a main shell 100 and an anti-corrosion connector 200; a limit platform 210 is protruded from the middle part of the outer wall of the anti-corrosion connector 200, and the limit platform 210 separates the anti-corrosion connector 200 axially into a first tube portion 220 and a second tube portion 230. The first tube portion 220 is detachably connected to the main shell 100, and the second tube portion 230 is used to connect to the tank body.

[0036] The ultrasonic liquid level meter of this embodiment is achieved by separating the anti-corrosion connecting head 200 and the main shell 100, and making the anti-corrosion connecting head 200 of anti-corrosion material, and making the main shell 100 of conventional materials, so as to reduce the manufacturing cost of the ultrasonic liquid level meter of this embodiment on the basis of ensuring that the connection between the ultrasonic liquid level meter of this embodiment and the tank body is not easily corroded; at the same time, a limit platform 210 is protruded from the middle part of the outer side of the anti-corrosion connecting head 200, and the limit platform 210 plays a positioning role, so that there is sufficient contact and connection area between the first tube part 220 and the main shell 100, and there is sufficient contact and connection area between the second tube part 230 and the tank body, thereby ensuring the connection strength between the anti-corrosion connecting head 200 and the main shell 100 while ensuring the connection strength between the anti-corrosion connecting head 200 and the tank body.

[0037] It is understood that the axial direction mentioned herein is the axial direction of the corrosion-resistant connector 200. For the sake of convenience in description, this embodiment uses Figure 1 The axial direction shown in FIG is used as an axial description, but should not be understood as a clear limitation to the axial direction.

[0038] Specifically, the anti-corrosion connector 200 is configured as a PVDF connector; PVDF material is easy to process and has good anti-corrosion performance, which is beneficial to reducing the manufacturing cost of the ultrasonic level meter of this embodiment.

[0039] In specific applications, the material of the anti-corrosion connector 200 can be reasonably selected according to the requirements of the actual use environment. For example, in other embodiments, the anti-corrosion connector 200 is made of PTFE material or PPS material.

[0040] Here, the detachable connection structure between the first tube portion 220 and the main housing 100 is described in detail. Figure 1 and Figure 3 As shown, in some embodiments, the outer wall of the first tube portion 220 is provided with a first threaded portion 221, and a first internal threaded hole is provided in the main shell 100, and the first internal threaded hole matches the first threaded portion 221; when the first tube portion 220 and the main shell 100 are assembled into one, it is only necessary to align the first threaded portion 221 with the first internal threaded hole, and then screw the first threaded portion 221 into the first internal threaded hole; the connection is tight and easy to assemble.

[0041] In another alternative embodiment, a fourth internally threaded hole is provided within the first tube portion 220, and a fourth threaded portion is provided on the outer wall of the main housing 100, the fourth threaded portion matching the fourth internally threaded hole. When the first tube portion 220 and the main housing 100 are assembled into one body, it is only necessary to screw the fourth threaded portion and the fourth internally threaded hole together.

[0042] like Figure 1 and Figure 3 As shown, one end of the first tube portion 220 away from the limit platform 210 is set as a mating section 222, and the end face of the mating section 222 away from the limit platform 210 is provided with a plurality of snap-in grooves 2221 circumferentially spaced apart, preferably with six snap-in grooves 2221 here; it is connected through the end face of the main shell 100 away from the anti-corrosion connector 200, and after the first threaded portion 221 and the first internal threaded hole are initially screwed together using tools such as a wrench, it is convenient to extend the auxiliary tool for outputting torque into the interior of the main shell 100 and clamp the claw of the auxiliary tool into the snap-in groove 2221 to achieve assembly, and then use the auxiliary tool to output torque to drive the anti-corrosion connector 200 to rotate, so that the anti-corrosion connector 200 is screwed more tightly to the main shell 100.

[0043] like Figure 3 As shown, the interior of the mating section 222 is provided with a tapered hole 2222, the diameter of which gradually increases in the direction away from the limiting platform 210. The tapered hole 2222 serves as a guide to ensure that the claws of the auxiliary tool are fully engaged in the engaging groove 2221 when the head of the auxiliary tool is inserted.

[0044] like Figure 1 and Figure 3 As shown, specifically, the first tube portion 220 is provided with a retaining ring groove 223 at the connection between the first threaded portion 221 and the mating section 222, and a shaft retaining ring 410 is embedded in the retaining ring groove 223. After the anti-corrosion connector 200 is further tightened using an auxiliary tool, the retaining ring groove 223 is now located inside the main housing 100, and the shaft retaining ring 410 is then embedded in the retaining ring groove 223, and the end of the shaft retaining ring 410 facing the limiting platform 210 abuts against the inner wall of the main housing 100 to form a limit, which is conducive to limiting the anti-corrosion connector 200.

[0045] In some embodiments, the end of the main housing 100 facing away from the anti-corrosion connector 200 is detachably connected to a cover plate 300; Figure 1 As shown, in some embodiments, a third threaded portion is provided on the outer wall of the end of the main housing 100 facing away from the anti-corrosion connector 200, and a third internally threaded hole is provided in the end surface of the cover plate 300 facing the main housing 100, and the third internally threaded hole matches the third threaded portion. When the cover plate 300 and the main housing 100 are assembled into one, it is only necessary to align the third internally threaded hole with the third threaded portion, and then screw the third internally threaded hole onto the third internally threaded hole. The connection is tight and the assembly is convenient. In another alternative embodiment of the above-mentioned detachable connection structure, a fifth internally threaded hole is provided in the end surface of the main housing 100 facing the cover plate 300, and a fifth threaded portion is provided on the outer wall of the end of the cover plate 300 facing the main housing 100, and the fifth threaded portion matches the fifth internally threaded hole.

[0046] like Figures 1 to 3 As shown, in some embodiments, the outer wall of the second tube portion 230 is provided with a second threaded portion 231, which is used to threadably connect with the second internally threaded hole of the tank body. When installing the ultrasonic level sensor of this embodiment on the tank body, the installer first aligns the second tube portion 230 with the second internally threaded hole reserved in the tank body, and then screws the second threaded portion 231 of the second tube portion 230 into the second threaded hole. This connection is tight and easy to assemble.

[0047] like Figure 2 and Figure 3 Specifically, two clamping openings 232 are circumferentially spaced apart on the outer wall of the second tube portion 230. The clamping openings 232 extend axially from the end face of the second tube portion 230 facing away from the stop platform 210 to the end of the second threaded portion 231 facing the stop platform 210. The two clamping openings 232, spaced 180 degrees circumferentially apart, provide a position for a tool such as a wrench to clamp and prevent it from slipping, thereby driving the anti-corrosion connector 200 to rotate and screw the first threaded portion 221 and the first internally threaded hole together.

[0048] like Figure 2 As shown, specifically, the main shell 100 includes a main body 110 and a connecting portion 120. The connecting portion 120 is arranged at one end of the main body 110 axially toward the anti-corrosion connecting head 200, and the connecting portion 120 is arranged in a hexagonal prism shape. Such an arrangement can provide a clampable and anti-slip plane on the main shell 100, so as to clamp and fix the main shell 100 and drive the anti-corrosion connecting head 200 to rotate relative to the main shell 100, and screw the first threaded portion 221 into the first internal threaded hole, so as to facilitate assembly; and the hexagonal prism-shaped connecting portion 120 can also provide convenience for connecting the liquid level meter and the tank body of this embodiment.

[0049] like Figure 1 and Figure 3 As shown, in some embodiments, the first tube portion 220 is provided with a first annular groove 224, and the first annular groove 224 is provided with a first sealing ring 420. The first sealing ring 420 abuts between the main housing 100 and the stop platform 210. When the first tube portion 220 and the main housing 100 are assembled into one body, the first sealing ring 420 tightly abuts against the main housing 100 and the stop platform 210, respectively, which helps to improve the sealing connection performance between the main housing 100 and the corrosion-resistant connector 200. To improve the sealing performance, the first annular groove 224 is preferably provided between the first threaded portion 221 and the stop platform 210.

[0050] Specifically, the second tube portion 230 is provided with a second annular groove 233, into which a second sealing ring 430 is embedded. The second sealing ring 430 is used to abut between the stopper 210 and the outer wall of the tank body. When the second tube portion 230 and the tank body are assembled into one, the second sealing ring 430 is in close contact with the tank body and the stopper 210, respectively, which helps to improve the sealing connection performance between the tank body and the anti-corrosion connector 200. To improve the sealing performance, the second annular groove 233 is preferably provided between the second threaded portion 231 and the stopper 210.

[0051] like Figure 1 As shown, in some embodiments, a first internally threaded hole is provided in the connecting portion 120, a mounting cavity 111 is provided in the main body 110, and the mounting cavity 111 is communicated with the first internally threaded hole; the ultrasonic level meter of this embodiment further comprises a transducer body 510, which is connected to the first tube portion 220, a limiting boss 225 is provided around the inner wall of the first tube portion 220, and a third sealing ring 440 is provided between the limiting boss 225 and the transducer body 510. By adding the third sealing ring 440 between the limiting boss 225 and the transducer body 510, the third sealing ring 440 forms a barrier line, effectively reducing the corrosive liquid in the tank from entering the mounting cavity 111 through the gap between the limiting boss 225 and the transducer body 510.

[0052] Specifically, a third annular groove is recessed into the end surface of the limiting boss 225 facing the transducer body 510, and the third sealing ring 440 is embedded in the third annular groove at one end facing the limiting boss 225. The third sealing ring 440 is embedded in the third annular groove, extending the sealing barrier path and further reducing the risk of corrosive liquids within the tank entering the mounting cavity 111 through the gap between the limiting boss 225 and the transducer body 510.

[0053] Specifically, a circuit board is provided at the end of the transducer body 510 facing away from the limiting boss 225, and the circuit board is electrically connected to a terminal block 520, which is connected to the mounting cavity 111 through a column 530; the ultrasonic liquid level meter of this embodiment also includes a partition plate 540 arranged in the mounting cavity 111, and the partition plate 540 is provided with a plug hole for plugging and mating the terminal of the terminal block 520.

[0054] In order to facilitate the assembly of the transducer body 510 with the main body, specifically, the circuit board is connected to the transducer body 510 by screws.

[0055] like Figure 1 and Figure 2 As shown, specifically, the main body 110 is provided with a wire tube 550 , the wire tube 550 is communicated with the installation cavity 111 , and the wire tube 550 is provided with a wiring gland 551 .

[0056] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations shall all fall within the scope defined by the attached utility model.

Claims

1. An ultrasonic level meter, characterized in that: include: main shell(100); The anti-corrosion connector (200) has a stopper (210) protruding from the middle of the outer wall thereof. The stopper (210) separates the anti-corrosion connector (200) into a first tube portion (220) and a second tube portion (230) along the axial direction. The first tube portion (220) is detachably connected to the main shell (100), and the second tube portion (230) is used for connecting to a tank body.

2. The ultrasonic level meter according to claim 1, characterized in that: The outer side wall of the first tube portion (220) is provided with a first threaded portion (221), and a first internal threaded hole is provided in the main housing (100), and the first internal threaded hole matches the first threaded portion (221).

3. The ultrasonic level meter according to claim 2, characterized in that: One end of the main shell (100) facing away from the anti-corrosion connector (200) is detachably connected to a cover plate (300); one end of the first tube portion (220) facing away from the limit platform (210) is provided as a fitting section (222); and a plurality of snap-fit ​​grooves (2221) are provided on the end surface of the fitting section (222) facing away from the limit platform (210) at intervals along the circumferential direction.

4. The ultrasonic level meter according to claim 3, characterized in that: The interior of the matching section (222) is configured as a tapered hole (2222), and the diameter of the tapered hole (2222) gradually increases in a direction away from the limiting platform (210).

5. The ultrasonic level meter according to claim 3, characterized in that: The first tube portion (220) is provided with a retaining ring groove (223) at the connection between the first threaded portion (221) and the matching section (222), and a shaft retaining ring (410) is embedded in the retaining ring groove (223).

6. An ultrasonic level meter according to any one of claims 1 to 5, characterized in that: The outer side wall of the second tube portion (230) is provided with a second threaded portion (231), and the second threaded portion (231) is used for threaded connection with the second internal threaded hole of the tank body.

7. The ultrasonic level meter according to claim 6, characterized in that: Two clamping openings (232) are provided on the outer side wall of the second tube portion (230) at intervals along the circumferential direction, and the clamping openings (232) extend axially from the end surface of the second tube portion (230) facing away from the limiting platform (210) to an end of the second threaded portion (231) facing the limiting platform (210); And / or, one end of the main shell (100) facing the corrosion-resistant connector (200) is provided as a connecting portion (120), and the connecting portion (120) is provided in a hexagonal prism shape.

8. The ultrasonic level meter according to claim 2, characterized in that: The first tube portion (220) is provided with a first annular groove (224), the first annular groove (224) is provided with a first sealing ring (420), and the first sealing ring (420) is in contact between the main housing (100) and the limiting platform (210); And / or, the second tube portion (230) is provided with a second annular groove (233), the second annular groove (233) is embedded with a second sealing ring (430), and the second sealing ring (430) is used to abut between the limiting platform (210) and the outer wall of the tank body.

9. The ultrasonic level meter according to claim 2, characterized in that: The main shell (100) includes a main body (110) and a connecting part (120), the first internal threaded hole is arranged in the connecting part (120), and a mounting cavity (111) is arranged in the main body (110), and the mounting cavity (111) is communicated with the first internal threaded hole; the ultrasonic liquid level meter also includes a transducer body (510), the transducer body (510) is connected to the first tube part (220), and a limiting boss (225) is provided on the inner wall of the first tube part (220), and a third sealing ring (440) is provided between the limiting boss (225) and the transducer body (510).

10. The ultrasonic level meter according to claim 9, characterized in that: A third annular groove is concavely provided on the end surface of the limiting boss (225) facing the transducer body (510), and one end of the third sealing ring (440) facing the limiting boss (225) is embedded in the third annular groove.

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