Digital display pressure gauge switch

Abstract

The utility model discloses a digital display pressure gauge switch which comprises an outer shell, an inner shell installed inside the outer shell and a display screen arranged at the top of the inner shell, a circuit board is fixedly connected inside the inner shell, a sensor is installed on the circuit board, a detection column is integrally formed at the bottom of the inner wall of the inner shell in an injection molding mode, and a through hole is formed in the middle of the detection column in a penetrating mode. A through hole is formed in the top of the detection column, a groove is formed in the top of the detection column, the through hole is communicated with the groove, a supporting sleeve is arranged in the through hole, a sealing sleeve is installed on the top of the detection column, and an annular convex edge matched with the groove is arranged on the outer side of the sealing sleeve. The extension part can increase the contact area between the sealing sleeve and the supporting sleeve and the sensor, and compared with a shape ring in the prior art, the contact area between the sealing sleeve and the sensor is larger, so that a better sealing effect is achieved, and accurate measurement of the sensor is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure gauges, in particular to a digital pressure gauge switch. Background Art

[0002] The digital pressure gauge switch is an intelligent, high-precision pressure control device that integrates pressure measurement, display, and control. It senses pressure changes through built-in sensors, converts them into electrical signals for processing, and finally displays the pressure value in digital form on the display. It mainly consists of a housing, a sensor, a circuit board, and a display. The sensor is installed on the circuit board, and an O-ring is installed on the sensor for sealing to avoid leakage and affect the measurement results of the sensor.

[0003] The O-ring in the existing digital pressure gauge switch is usually fixed to the circuit board with an iron sheet. The structure is relatively complex, and the contact area of ​​the O-ring is small, so its sealing effect is relatively limited. After long-term use, it is easy to leak, resulting in inaccurate measurement of the sensor. Utility Model Content

[0004] The purpose of the present utility model is to provide a digital pressure gauge switch to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a digital pressure gauge switch, comprising an outer shell, an inner shell installed inside the outer shell, and a display screen arranged on the top of the inner shell, the inner shell is fixedly connected to a circuit board, a sensor is installed on the circuit board, a detection column is integrally injection-molded at the bottom of the inner wall of the inner shell, a through hole is penetrated through the middle of the detection column, a groove is provided on the top of the detection column, and the through hole is connected to the groove, a support sleeve is provided inside the through hole, a sealing sleeve is installed on the top of the detection column, an annular convex edge matching the groove is provided on the outer side of the sealing sleeve, a circle of extension is provided at the bottom of the sealing sleeve, a through hole is penetrated through the middle of the sealing sleeve, and the top edge of the through hole is chamfered.

[0006] As a preferred solution of the present invention, the detection end of the sensor passes through the sealing sleeve and extends to the inside of the through hole.

[0007] As a preferred solution of the present invention, a cross block is provided on the inner wall of the support sleeve.

[0008] As a preferred solution of the present invention, an insert is provided inside the through hole, a detection joint is connected to the bottom of the insert, a detection hole is provided through the middle of the detection joint, and the detection hole is communicated with the through hole.

[0009] As a preferred solution of the present invention, a sealing gasket is provided between the detection joint and the insert.

[0010] As a preferred solution of the present invention, a buckle is provided on the outer side of the inner shell, and a slot matching the buckle is provided on the outer side of the outer shell.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention can increase the contact area between the sealing sleeve and the circuit board and the detection column by setting the annular convex edge, and the extension portion can increase the contact area between the sealing sleeve and the support sleeve and the sensor, and the sealing sleeve has a larger contact area with the sensor than the ring in the prior art, thereby achieving a better sealing effect and ensuring accurate sensor measurement. At the same time, the support sleeve and the detection column can limit the sealing sleeve, without the need for iron sheets for fixation, making the structure simpler and easier to produce and assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

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

[0014] Figure 3 For this utility model Figure 2 Enlarged view of point A in the middle;

[0015] Figure 4 This is a schematic structural diagram of the sealing sleeve of the utility model;

[0016] Figure 5 This is a schematic structural diagram of the inner shell of the utility model;

[0017] Figure 6 This is a schematic structural diagram of the support sleeve of the utility model;

[0018] Figure 7 It is a structural schematic diagram of the bottom of the utility model.

[0019] In the figure: 1. Outer shell; 2. Detection connector; 3. Inner shell; 4. Display screen; 5. Buckle; 6. Slot; 7. Perforation; 8. Detection hole; 9. Circuit board; 10. Sealing gasket; 11. Through hole; 12. Detection column; 13. Chamfer; 14. Sealing sleeve; 15. Annular flange; 16. Groove; 17. Extension; 18. Support sleeve; 19. Cross block; 20. Insert; 21. Sensor. DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only 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 ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figures 1 to 7 The utility model provides a technical solution: a digital pressure gauge switch, comprising an outer shell 1, an inner shell 3 installed inside the outer shell 1, and a display screen 4 arranged on the top of the inner shell 3, the display screen 4 is used to display the value measured by the sensor 21, so that the user can observe it. The inner shell 3 is fixedly connected to a circuit board 9, which is fixed to the inner shell 3 by screws. A control chip is installed on the circuit board 9 for processing the data detected by the sensor 21. The control chip is a prior art and is not described in detail. The sensor 21 is installed on the circuit board 9, and a detection column 12 is integrally injection-molded at the bottom of the inner wall of the inner shell 3. The support sleeve 18 and the detection column 12 can limit the sealing sleeve 14, without the need to use an iron sheet for fixing, making the structure simpler and easier to produce and assemble. A through hole 11 is provided in the middle of the detection column 12, and a through hole 11 is provided on the top of the detection column 12. There is a groove 16, and the through hole 11 is connected to the groove 16. A support sleeve 18 is provided inside the through hole 11. A sealing sleeve 14 is installed on the top of the detection column 12. The outer side of the sealing sleeve 14 is provided with an annular convex edge 15 that matches the groove 16. The annular convex edge 15 can increase the contact area between the sealing sleeve 14 and the circuit board 9 and the detection column 12, and the extension portion 17 can increase the contact area between the sealing sleeve 14 and the support sleeve 18 and the sensor 21. Compared with the O-ring in the prior art, the sealing sleeve 14 has a larger contact area with the sensor 21, thereby achieving a better sealing effect and ensuring that the sensor 21 measures accurately. A circle of extension portion 17 is provided at the bottom of the sealing sleeve 14, and a through hole 7 is provided through the middle of the sealing sleeve 14. The top edge of the through hole 7 is provided with a chamfer 13. The chamfer 13 makes it easier for the sensor 21 to pass through the sealing sleeve 14 during installation.

[0022] The detection end of the sensor 21 passes through the sealing sleeve 14 and extends to the inside of the through hole 11 .

[0023] A cross block 19 is provided on the inner wall of the support sleeve 18 , and the cross block 19 is used to improve the structural strength of the support sleeve 18 and prevent the support sleeve 18 from being deformed.

[0024] Among them, an insert 20 is provided inside the through hole 11, and the insert 20 is made of metal, so that the detection joint 2 is firmly connected. The bottom of the insert 20 is connected to the detection joint 2, and the detection joint 2 is used to connect to the pipeline to be detected, so as to facilitate the measurement of the sensor 21. A detection hole 8 is provided through the middle of the detection joint 2, and the detection hole 8 is connected to the through hole 11.

[0025] Among them, a sealing gasket 10 is provided between the detection joint 2 and the insert 20. The sealing gasket 10 is used to improve the sealing between the detection joint 2 and the insert 20 to avoid leakage between the detection joint 2 and the insert 20. At the same time, it can also seal the detection joint 2 and the inner shell 3.

[0026] A buckle 5 is provided on the outer side of the inner shell 3 , and a slot 6 matching the buckle 5 is provided on the outer side of the outer shell 1 . The slot 6 cooperates with the buckle 5 to fix the outer shell 1 and the inner shell 3 .

[0027] Specifically, when installing the sealing sleeve 14, the sealing sleeve 14 is installed into the through hole 11, the extension part 17 is inserted into the inner side of the support sleeve 18, and the annular flange 15 is inserted into the groove 16. Then, the circuit board 9 is taken out, and the sensor 21 is aligned with the through hole 7 on the sealing sleeve 14 and inserted. Then, the circuit board 9 is fixed to the inner shell 3 with screws. After the circuit board 9 is fixed, the circuit board 9 and the detection column 12 cooperate to squeeze the sealing sleeve 14, thereby further improving the sealing effect of the sealing sleeve 14.

[0028] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "two ends", 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 the present invention 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 the present invention.

[0029] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one such feature.

[0030] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A digital pressure gauge switch, comprising an outer shell (1), an inner shell (3) mounted inside the outer shell (1), and a display screen (4) arranged on the top of the inner shell (3), wherein a circuit board (9) is fixedly connected to the interior of the inner shell (3), and a sensor (21) is mounted on the circuit board (9), characterized in that: The bottom of the inner wall of the inner shell (3) is integrally injection-molded with a detection column (12), a through hole (11) is provided through the middle of the detection column (12), a groove (16) is provided at the top of the detection column (12), and the through hole (11) is communicated with the groove (16), a support sleeve (18) is provided inside the through hole (11), a sealing sleeve (14) is installed on the top of the detection column (12), an annular convex edge (15) matching the groove (16) is provided on the outer side of the sealing sleeve (14), a circle extension portion (17) is provided at the bottom of the sealing sleeve (14), a through hole (7) is provided through the middle of the sealing sleeve (14), and the top edge of the through hole (7) is provided with a chamfer (13).

2. The digital pressure gauge switch according to claim 1, characterized in that: The detection end of the sensor (21) passes through the sealing sleeve (14) and extends to the inside of the through hole (11).

3. The digital pressure gauge switch according to claim 1, characterized in that: The inner wall of the support sleeve (18) is provided with a cross block (19).

4. The digital pressure gauge switch according to claim 1, characterized in that: An insert (20) is provided inside the through hole (11), a detection connector (2) is connected to the bottom of the insert (20), a detection hole (8) is provided through the middle of the detection connector (2), and the detection hole (8) is communicated with the through hole (11).

5. The digital pressure gauge switch according to claim 4, characterized in that: A sealing gasket (10) is provided between the detection joint (2) and the insert (20).

6. The digital pressure gauge switch according to claim 1, characterized in that: A buckle (5) is provided on the outer side of the inner shell (3), and a slot (6) matching the buckle (5) is provided on the outer side of the outer shell (1).

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