Shielding case structure of magnetostrictive liquid level meter movement

Abstract

The utility model discloses a magnetostrictive liquid level meter movement shielding case structure which comprises a shielding case upper cover and a shielding case lower cover, the shielding case upper cover and the shielding case lower cover are mutually matched, the shielding case upper cover is arranged on the shielding case lower cover in a covering mode, a movement is arranged in the shielding case lower cover, and a PCB is arranged at the bottom of the shielding case lower cover. Contact gaps exist between the side walls of the shielding case upper cover and the shielding case lower cover, and the contact gaps of the shielding case upper cover and the shielding case lower cover are arranged in a staggered mode. According to the utility model, a scheme of nesting an upper structure and a lower structure is adopted, the problem that cracks existing in a stamping and bending structure cannot be completely shielded is solved, a complete shielding effect is realized by staggering the positions of the cracks, and the shielding effect is relatively high.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetostrictive liquid level gauges, in particular to a shielding cover structure for a magnetostrictive liquid level gauge movement. Background Technique

[0002] At present, the traditional shielding cover structure of a magnetostrictive liquid level gauge movement is a copper structure shielding part of a single shielding cover formed by die casting. After being fixed to a PCB by soldering and then installed in a plastic shell made of PP material, it plays a role in shielding external interference. Due to the limitations of the die-casting process, there are certain requirements for the wall thickness of the shielding cover, and the fillets at the four corners are relatively large. It often occupies a larger space compared to the movement, and the accuracy is difficult to control, resulting in an increase in the thickness and space of the movement and the whole machine, and the process cost is also relatively high.

[0003] Therefore, we propose a shielding cover structure for a magnetostrictive liquid level gauge movement to solve the above problems. Content of the Utility Model

[0004] The purpose of the utility model is to solve the deficiencies existing in the prior art, and a shielding cover structure for a magnetostrictive liquid level gauge movement is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A shielding cover structure for a magnetostrictive liquid level gauge movement includes a shielding cover upper cover and a shielding cover lower cover assembled in a buckling manner. A movement is arranged inside the shielding cover lower cover, and the side wall joints of the shielding cover upper cover and the shielding cover lower cover are arranged staggeredly.

[0007] Preferably, a plurality of welding feet are arranged at the lower edge of the shielding cover upper cover.

[0008] Preferably, both the shielding cover upper cover and the shielding cover lower cover are made of cupronickel sheet material.

[0009] Preferably, a plurality of welding feet are symmetrically arranged on the lower end face of the movement, and mounting holes corresponding to the welding feet on the lower end face of the movement are symmetrically arranged on the shielding cover lower cover.

[0010] Preferably, a PCB board is arranged at the bottom of the shielding cover lower cover; two mounting holes corresponding to the welding feet of the shielding cover lower cover are symmetrically arranged on the PCB board.

[0011] Preferably, the shielding cover upper cover and the shielding cover lower cover are provided with notches at the corresponding bottom sides, so as to form mounting holes after buckling; the mounting holes are suitable for arranging waveguide tubes connected to the movement.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: To solve the inconvenience caused by the overly large rounded corners of the movement shielding cover and improve the shielding effect, the present utility model uses cupronickel sheets to make a cupronickel shielding cover through stamping and bending, which can well solve the inconvenience brought by the die-cast shielding cover and fully reduce the volume and weight.

[0013] At the same time, in order to achieve a good shielding effect, a scheme of upper and lower structure nesting is adopted to shield from six directions, namely, the upper, lower, and four surrounding directions of the movement. At the same time, the upper and lower nesting structure solves the crack problem existing in the stamping and bending structure itself in an extremely effective way through the dislocation of the bending gaps, and more effectively achieves the shielding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0015] Figure 2 is an exploded structural schematic diagram of the present utility model;

[0016] Figure 3 is an assembly drawing of the present utility model;

[0017] Figure 4 is a partial three-dimensional structural schematic diagram of the present utility model.

[0018] In the figure:

[0019] 1 upper shielding cover, 2 lower shielding cover, 3 movement, 4 PCB board. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0021] Referring to Figures 1-4 a structure of a magnetostrictive level gauge movement shielding cover shown, which includes:

[0022] an upper shielding cover 1 and a lower shielding cover 2 assembled in a snap-fit manner, with a movement 3 arranged inside the lower shielding cover 2, and the movement 3 adopts the prior art;

[0023] To achieve a better shielding effect, among which, the upper shielding cover 1 and the lower shielding cover 2 are both made of cupronickel sheet material. The upper shielding cover 1 and the lower shielding cover 2 are both manufactured by stamping of sheet metal. There are contact gaps between the side walls of the upper shielding cover 1 and the lower shielding cover 2. The contact gaps between the upper shielding cover 1 and the lower shielding cover 2 are arranged staggeredly. By arranging them staggeredly, the appearance of shielding gaps is avoided. Among which, the staggered arrangement makes the gaps of the upper shielding cover 1 blocked by the lower shielding cover 2, and similarly, the gaps of the lower shielding cover 2 are blocked by the upper shielding cover 1, avoiding the influence of the appearance of gaps on the overall shielding effect. The overall upper shielding cover 1 and the lower shielding cover 2 do not require high-sealing processing, thus reducing the stamping and assembly production difficulty;

[0024] To achieve welding fixation, a plurality of welding feet are arranged at the lower edge of the upper shielding cover 1. A plurality of welding feet are symmetrically arranged on the lower end face of the movement 3. A plurality of mounting holes corresponding to the welding feet on the lower end face of the movement 3 are symmetrically arranged on the lower shielding cover 2. A PCB board 4 is arranged at the bottom of the lower shielding cover 2; Two mounting holes corresponding to the welding feet of the lower shielding cover 2 are symmetrically arranged on the PCB board 4.

[0025] To match the waveguide of the movement 3, the upper shielding cover 1 and the lower shielding cover 2 are provided with notches at the corresponding bottom sides, so as to form mounting holes after being buckled; The mounting holes are suitable for arranging waveguides connected to the movement 3.

[0026] When installing this shielding cover, by placing the movement 3 into the lower shielding cover 2, the welding feet of the movement 3 pass through the corresponding jacks. After pressing the movement 3 against the lower shielding cover 2, the upper shielding cover 1 is covered. The welding feet of the upper shielding cover 1 pass through the welding foot holes of the PCB board 4 to complete the welding of the upper shielding cover 1, and thus the fixation of the shielding cover and the movement 3 can be achieved.

[0027] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent replacements or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A shielding cover structure for a magnetostrictive level gauge, characterized in that: The invention comprises a shielding cover upper cover (1) and a shielding cover lower cover (2) assembled in a buckled manner, an organic core (3) is arranged in the shielding cover lower cover (2), and side wall seams of the shielding cover upper cover (1) and the shielding cover lower cover (2) are arranged in a staggered manner.

2. The shielding cover structure of a magnetostrictive liquid level gauge according to claim 1, characterized in that: The lower edge of the shielding cover upper cover (1) is provided with a plurality of welding feet.

3. The shielding cover structure of a magnetostrictive liquid level gauge according to claim 1, characterized in that: The shielding cover upper cover (1) and the shielding cover lower cover (2) are both made of nickel silver sheet material.

4. The shielding cover structure of a magnetostrictive liquid level gauge according to claim 1, characterized in that: The lower end surface of the movement (3) is symmetrically provided with a plurality of welding feet, and the shielding cover lower cover (2) is symmetrically provided with mounting holes corresponding to the welding feet of the lower end surface of the movement (3).

5. The shielding cover structure of a magnetostrictive liquid level gauge according to claim 1, characterized in that: A PCB board (4) is arranged at the bottom of the lower cover (2) of the shielding case; and two mounting holes corresponding to the welding feet of the lower cover (2) of the shielding case are symmetrically arranged on the PCB board (4).

6. The shielding cover structure of a magnetostrictive liquid level gauge according to claim 1, characterized in that: The upper shielding cover (1) and the lower shielding cover (2) are provided with notches on the corresponding bottom sides, so as to form a mounting hole after being buckled together; the mounting hole is suitable for arranging a waveguide tube connected to the movement (3).

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