Liquid level sensor mounting mechanism

Abstract

The utility model relates to the technical field of liquid level sensors, in particular to a liquid level sensor mounting mechanism. Comprising a fixing ring and a mounting plate, the fixing ring is fixedly mounted on the liquid tank, the bottom of the mounting plate is fixedly connected with an outer electrode tube, the outer electrode tube is connected to the center of the bottom face of the mounting plate and penetrates through the fixing ring, a mounting groove is formed in the bottom face of the mounting plate, and a sealing ring is arranged in the mounting groove and sleeves the periphery of the fixing ring. The mounting plate and the fixing ring are fixedly connected in a threaded fit mode. By means of the structure, the fixing ring and the mounting plate are connected more conveniently in a threaded fit connection mode, and the sealing effect is better by means of threaded connection and then arrangement of the sealing ring in the mounting groove.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid level sensors, in particular to a liquid level sensor installation mechanism. Background Art

[0002] The most commonly used liquid level sensor is a capacitive type. Its principle is to use the capacitance formed by the liquid medium between the positive and negative probes to change linearly with the liquid level. The change in capacitance (i.e., the change in liquid level) is converted into a standardized electrical signal output. The core component of this product is a highly integrated, dedicated capacitance measurement chip. With precise temperature compensation and linear correction, it offers high accuracy, high stability, and continuous measurement, as well as strong independence. The mounting structure of the liquid level sensor is a key component for mounting the sensor on the liquid tank.

[0003] In the prior art, the installation mechanism of the liquid level sensor is to directly add a rubber gasket between the sensor installation bottom surface and the liquid level tank, then apply sealant, and fix it with bolt pressure, or install a flange with internal threads on the liquid level tank in advance, then add a sealing ring under the flange, apply sealant and fix it with bolt pressure, and finally screw the sensor onto the flange through the middle internal thread.

[0004] In the above-mentioned prior art, the installation process requires the addition of sealant, which is time-consuming, labor-intensive, and tedious, requiring high manual skills from the installer. Furthermore, the large contact area of ​​the gasket often results in uneven installation. Furthermore, seal failure often occurs during external forces, collisions, or vibrations, leading to liquid leakage. Utility Model Content

[0005] In response to the above problems, the utility model provides a liquid level sensor installation mechanism that uses an outer sealing ring to achieve sealing, without the need to apply sealant, to solve the problems of low installation efficiency and sealing failure and liquid leakage caused by multiple bolt connections in the existing technology.

[0006] The utility model is realized by using the following technical scheme: a liquid level sensor mounting mechanism, comprising a fixing ring and a mounting plate, the fixing ring being fixedly mounted on the liquid tank, the bottom of the mounting plate being fixedly connected to an outer electrode tube, the outer electrode tube being connected to the center position of the bottom surface of the mounting plate and passing through the fixing ring, a mounting groove being opened on the bottom surface of the mounting plate, a sealing ring being arranged in the mounting groove, the sealing ring being sleeved on the circumference of the fixing ring, and the mounting plate and the fixing ring being fixedly connected by means of threaded cooperation.

[0007] Through the above structure, the connection between the fixing ring and the mounting plate is more convenient through the threaded connection, and the sealing effect is better when a sealing ring is provided in the mounting groove through the threaded connection.

[0008] Furthermore, an externally threaded tube is fixedly mounted at the center of the bottom surface of the mounting plate. The externally threaded tube is sleeved onto the outer surface of the outer electrode tube and coaxially fixedly connected to the outer electrode tube. An internally threaded tube is fixedly mounted in the middle of the fixing ring, extending through the fixing ring and threadedly mating with the internally threaded tube. This mating allows the mounting plate to be installed by simply aligning the externally threaded tube with the internally threaded tube and then rotating the mounting plate.

[0009] Furthermore, the top surface of the internally threaded tube is flush with the top surface of the fixing ring, and the bottom surface of the internally threaded tube is located below the bottom surface of the fixing ring. A portion of the bottom of the internally threaded tube extends downward, making the length of the threaded fit longer and increasing the stability of the installation.

[0010] Furthermore, the cross-section of the sealing ring along the vertical direction coinciding with the diameter is circular. The circular arrangement enables the sealing ring to fit tightly with the side wall of the fixing ring and the bottom surface of the mounting plate, thereby increasing the sealing effect.

[0011] Furthermore, the bottom of the sealing ring is lower than the lower surface of the mounting plate. With the above structure, when the mounting plate is installed, the sealing ring can be squeezed by the liquid box, so that the sealing ring is tightly fitted with the top surface of the mounting plate and the side wall of the fixing ring.

[0012] Furthermore, the external threaded pipe and the mounting plate, as well as the mounting plate and the internal threaded pipe are all integrally formed. Through the integrally formed arrangement, the connection between the external threaded pipe and the mounting plate, as well as the connection between the mounting plate and the internal threaded pipe is more stable.

[0013] Furthermore, a signal processing device is fixedly mounted on the top of the mounting plate. By installing the signal processing device, the signal processing of the device is made more convenient.

[0014] In summary, the beneficial effects of the present invention are:

[0015] The installation method of the fixing ring and the mounting plate thread cooperation makes the installation of the liquid level sensor more convenient; after the installation is completed, three seals will be formed, first, the seal between the internal threaded pipe and the external threaded pipe thread cooperation, then the seal between the mounting plate and the fixing ring, and finally the seal between the sealing ring and the top surface of the mounting groove, and the sealing ring and the side wall of the fixing ring, which has a better sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a structural diagram of the mounting plate;

[0018] Figure 3Schematic diagram of the structure of the fixed ring;

[0019] Figure 4 Schematic diagram of the structure of the sealing ring;

[0020] Figure 5 A cross-sectional view of the sealing ring.

[0021] In the figure: 1-signal processing device; 2-mounting plate; 3-sealing ring; 4-fixing ring; 5-external electrode tube; 6-inner threaded tube; 7-mounting groove; 8-external threaded tube. DETAILED DESCRIPTION

[0022] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0023] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0024] The following is a description of preferred embodiments of the present invention with reference to the accompanying drawings.

[0025] like Figure 1 、 Figure 2 , as shown, the utility model provides a liquid level sensor installation mechanism, including a mounting plate 2 fixedly mounted on the liquid level sensor. Specifically, the mounting plate 2 is in the shape of a circular ring with a hole in the middle. The middle part of the mounting plate 2 is coaxially fixedly connected to the outer electrode tube 5 of the liquid level sensor. A signal processing device 1 is also fixedly connected to the top of the mounting plate 2 by bolts. The top of the outer electrode tube 5 passes through the mounting plate 2 and extends into the signal processing device 1. The signal processing device 1 and the outer electrode tube 5 are both prior art and will not be described in detail here. A circular mounting groove 7 is also provided on the bottom surface of the mounting plate 2. A fixing ring 4 is fixedly mounted on the liquid tank. A plurality of threaded holes are arranged in a circumferential array on the edge of the fixing ring 4. Bolts fix the liquid tank and the fixing ring 4 together through the threaded holes.

[0026] like Figure 2 、 Figure 3As shown, the mounting plate 2 and the fixing ring 4 in the present device can be coaxially fixedly connected together by means of threaded fit; specifically, an externally threaded tube 8 is coaxially fixedly connected to the top surface of the mounting groove 7, and an internally threaded tube 6 is coaxially fixedly connected to the middle part of the fixing ring 4. The externally threaded tube 8 and the internally threaded tube 6 are threadedly fitted. When the fixing ring 4 and the mounting plate 2 are installed, the upper surface of the fixing ring 4 is tightly fitted with the top surface of the mounting groove 7, that is, the two are at odds with each other at this time.

[0027] The fixing ring 4 and the internally threaded tube 6 , and the mounting plate 2 and the externally threaded tube 8 are all integrally formed.

[0028] The threaded tube 6 in the lower half of the fixing ring 3 in this device is the key pressure-bearing part that withstands the lateral destructive thrust. During installation, a hole with an interference tolerance is drilled on the surface of the liquid tank, and the lateral thrust can be withstood by using a low-temperature process or strong pressure.

[0029] like Figure 1 、 Figure 4 As shown, the diameter of the mounting groove 7 is larger than the diameter of the fixing ring 4, and a sealing ring 3 is also installed at the mounting groove 7. The sealing ring 3 can be sleeved on the circumference of the fixing ring 4, and the bottom position of the sealing ring 3 is lower than the lower surface of the mounting plate 2, that is, the sealing ring 3 can be against the side wall of the fixing ring 4. When the fixing ring 4 and the mounting plate 2 are fixedly installed, the sealing ring 3 is squeezed by the mounting plate 2 and the liquid tank, that is, the upper and lower positions of the sealing ring 3 can be against the top surface of the mounting groove 7 and the liquid tank, thereby realizing the first level of sealing.

[0030] As a further illustration of this example, the top surface of the internally threaded tube 6 is flush with the top surface of the fixing ring 4, and the bottom surface of the internally threaded tube 6 is located below the bottom surface of the fixing ring 4. In this way, the length of the threaded fit between the internally threaded tube and the externally threaded tube is increased, thereby making the connection between the two more stable and the sealing effect better.

[0031] like Figure 5 As shown, the sealing ring 3 is cut vertically and coincident with the diameter, and its cross-section is circular. It can be understood that the sealing ring 3 is a circle composed of a slender cylindrical shape connected end to end. The circular design is designed to better fit the side walls of the mounting plate 2, the liquid tank, and the fixing ring 4.

[0032] The device works as follows: The retaining ring 4 is directly inserted into the bottom hole of the liquid tank and fixed to the liquid tank via four fixing screws. The four fixing screws of the retaining ring 4 only bear the upper and lower tightening force. In actual use, most of the huge lateral thrust is borne by the lower part of the retaining ring. When the liquid level sensor needs to be installed, the sealing ring 3 must first be placed in the mounting groove 7. Then, the outer electrode tube 5 is inserted into the oil tank through the internal threaded tube 6. When the external threaded tube 8 reaches the position of the internal threaded tube 6, the mounting plate 2 is rotated to fix the mounting plate 2 and the retaining ring 4.

[0033] To sum up, the liquid level sensor installation mechanism provided by the present invention is installed in a manner that the fixing ring 4 and the mounting plate 2 are threaded together, so that the installation of the liquid level sensor is more convenient; after the installation is completed, three seals will be formed, first, the seal between the threaded fitting of the internal threaded tube 6 and the external threaded tube 8, then the seal between the mounting plate 2 and the fixing ring 4, and finally the seal between the sealing ring 3 and the top surface of the mounting groove 7, and the sealing ring 3 and the side wall of the fixing ring 4, which has a better sealing effect.

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.

Claims

1. A liquid level sensor mounting mechanism, comprising a fixing ring (4) and a mounting plate (2), wherein the fixing ring (4) is fixedly mounted on a liquid tank, and the bottom of the mounting plate (2) is fixedly connected to an outer electrode tube (5), characterized in that: The outer electrode tube (5) is connected to the center position of the bottom surface of the mounting plate and passes through the fixing ring (4). The bottom surface of the mounting plate (2) is provided with a mounting groove (7). A sealing ring (3) is provided in the mounting groove (7). The sealing ring (3) is sleeved on the circumference of the fixing ring (4). The mounting plate (2) and the fixing ring (4) are fixedly connected by means of threaded engagement.

2. The liquid level sensor installation mechanism according to claim 1, characterized in that: An external threaded tube (8) is fixedly mounted at the center of the bottom surface of the mounting plate (2), and the external threaded tube (8) is sleeved on the outer surface of the outer electrode tube (5) and fixedly connected coaxially to the outer electrode tube (5); an internal threaded tube (6) that passes through the fixing ring (4) is fixedly mounted at the middle of the fixing ring (4), and the external threaded tube (8) and the internal threaded tube (6) are threadably matched.

3. The liquid level sensor installation mechanism according to claim 2, characterized in that: The top surface of the internally threaded tube (6) is flush with the top surface of the fixing ring (4), and the bottom surface of the internally threaded tube (6) is located below the bottom surface of the fixing ring (4).

4. The liquid level sensor installation mechanism according to claim 1, characterized in that: The cross-section of the sealing ring (3) along the vertical direction coinciding with the diameter is circular.

5. The liquid level sensor installation mechanism according to claim 4, characterized in that: The bottom of the sealing ring (3) is located lower than the lower surface of the mounting plate (2).

6. The liquid level sensor installation mechanism according to claim 2, characterized in that: The external threaded tube (8) and the mounting plate (2), as well as the mounting plate (2) and the internal threaded tube (6) are all designed to be integrally formed.

7. The liquid level sensor installation mechanism according to any one of claims 1 to 6, characterized in that: A signal processing device (1) is also fixedly mounted on the top of the mounting plate (2).

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