Pressure sensor

Abstract

The utility model discloses a pressure sensor, which comprises a shell main body, a shell seat, a pressure sensing assembly and a silica gel sealing ring, the shell main body and the shell seat are locked through a plurality of bolts; a pipeline connector is arranged at the lower end of the shell main body; the silica gel sealing ring is embedded in the lower side of the accommodating cavity; when the shell base is locked on the shell body, the pressure sensing assembly can abut against and press the silica gel sealing ring, and the upper side of the containing cavity is sealed. According to the utility model, the assembly mode that the shell seat and the shell main body are locked by the bolt is adopted, and a bidirectional pressing sealing structure of the silica gel sealing ring is combined, so that the positioning and fixing process of the pressure sensing assembly is simplified, high-precision coaxial sealing can be realized only by aligning and locking during installation, and the assembly efficiency and the sealing reliability are remarkably improved; the deformation of the silica gel sealing ring achieves a high-pressure sealing effect, and can meet the pressure detection of high-pressure working conditions of high-pressure steam pipelines such as coffee makers and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to pressure sensor technical field, in particular to a pressure sensor. BACKGROUND

[0002] Pressure sensor is a kind of electronic component for detecting pipeline pressure, and the water inlet of traditional pressure sensor is generally not adapted between the connection pipe mouth of the monitored, when using, need to connect quick connector.For example, patent number CN221147931 U discloses a kind of pressure sensor.It utilizes the pressure sensing cavity formed by elastic medium, pressure sensing cavity stores medium such as silicon oil, external air pressure is passed through pipeline and is transferred to pressure sensing assembly.The installation and sealing property of its pressure sensing assembly are required to be high, accurate positioning alignment is difficult to carry out when installing, and it is difficult to meet the pressure detection of high pressure working condition such as coffee device and high pressure steam pipeline.Therefore, it needs to be further improved. SUMMARY

[0003] The utility model at least solves one of the technical problems existing in the prior art.The utility model provides a kind of pressure sensor.

[0004] The technical scheme for solving the technical problems of one embodiment of the utility model is as follows: a kind of pressure sensor, comprising: shell main body, shell seat, pressure sensing assembly and silica gel sealing ring;

[0005] The shell main body and shell seat are locked by a plurality of bolts;The lower end of the shell main body is provided with a pipeline connector, and the upper end is provided with a receiving cavity;The silica gel sealing ring is embedded in the lower side of the receiving cavity;When the shell seat is locked in the shell main body, the pressure sensing assembly can be pressed against the silica gel sealing ring, and the upper side of the receiving cavity is sealed.

[0006] Optionally, the pressure sensing assembly includes a ceramic sensor core;The ceramic sensor core is located below the pressure sensing assembly, and the lower side is pressed against the silica gel sealing ring.

[0007] Optionally, the pressure sensing assembly further includes a circuit board and a buffer cotton;The circuit board is located above the ceramic sensor core;The buffer cotton is arranged between the circuit board and the ceramic sensor core.

[0008] Optionally, the inner wall of the receiving cavity is provided with a plurality of guide columns, and the ceramic sensor core is provided with a limiting slot corresponding to the guide column.

[0009] Optionally, the silica gel sealing ring is provided with a limiting notch corresponding to the guide column.

[0010] Optionally, the receiving cavity is cylindrical, and the plurality of guide columns are uniformly arranged along the circumference.

[0011] Optionally, a lower portion of the accommodating cavity is provided with an annular embedding groove for embedding a silica gel sealing ring.

[0012] Optionally, a periphery of the shell body is provided with a first bolt column, and the shell seat is provided with a second bolt column corresponding to the first bolt column; a bolt can pass through the second bolt column and be locked to the first bolt column.

[0013] Optionally, the first bolt column and the second bolt column are provided with a circular limiting recess and a circular limiting protrusion matched with each other.

[0014] The utility model discloses beneficial effects: adopt the assembly mode of bolt locking shell seat and shell body, combine the two-way compression sealing structure of silica gel sealing ring, simplify the positioning and fixed process of pressure sensing assembly, only need to lock in position during installation high-precision coaxial seal can be realized, the assembly efficiency and sealing reliability are improved significantly, and the deformation of silica gel sealing ring reaches the sealing effect of high pressure, can satisfy the pressure detection of high pressure working condition such as coffee machine and high pressure steam pipeline.

[0015] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are taken, and the accompanying drawings are described in detail as follows. DRAWINGS

[0016] The above and / or additional aspects and advantages of the utility model will become apparent and easy to understand from the description of embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 It is a structural schematic diagram of pressure sensor;

[0018] Figure 2 It is Figure 1 It is an exploded schematic diagram of medium pressure sensor;

[0019] Figure 3 It is Figure 1 It is another exploded schematic diagram of medium pressure sensor;

[0020] Figure 4 It is Figure 1 It is a sectional view of medium pressure sensor.

[0021] Main element symbol explanation:

[0022] 10, shell body; 11, pipeline connector; 12, guide column; 13, annular embedding groove; 14, first bolt column; 15, circular limiting recess; 20, shell seat; 21, second bolt column; 22, circular limiting protrusion; 30, pressure sensing assembly; 31, ceramic sensor core; 32, circuit board; 33, buffer cotton; 34, limiting groove; 40, silica gel sealing ring; 41, limiting notch; 50, accommodating cavity. DETAILED DESCRIPTION

[0023] This part will describe the specific embodiments of the present application in detail, the preferred embodiments of the present application are shown in the drawings, the role of the drawings is to supplement the description of the text part with graphics, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the present application, but it cannot be understood as a limitation on the protection scope of the present application.

[0024] In the description of the present application, the meaning of multiple is more than two, greater than, less than, more than, etc. is not included in the number, above, below, within, etc. is included in the number. If it is described as first, second, it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0025] In the description of the present application, it is understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and is not indicative or implied that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0026] In the present application, unless otherwise explicitly limited, the words "set", "install", "connect" and the like should be broadly understood, for example, they can be directly connected, or indirectly connected through an intermediate medium; can be fixedly connected, or can be detachably connected, or can be integrally formed; can be mechanically connected; can be the internal communication or interaction relationship of two elements. The skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical scheme.

[0027] Embodiment

[0028] Reference Figures 1 to 4 The present application provides a kind of pressure sensor, including: shell main body 10, shell seat 20, pressure sensing component 30 and silica gel sealing ring 40;

[0029] Shell main body 10 and shell seat 20 are locked by several bolts;The lower end of shell main body 10 is provided with pipeline connector 11, and the upper end is provided with receiving cavity 50;Silica gel sealing ring 40 is embedded in the lower side of receiving cavity 50;When shell seat 20 is locked in shell main body 10, pressure sensing component 30 can be pressed against silica gel sealing ring 40, and the upper side of receiving cavity 50 is sealed.

[0030] The utility model discloses a high-precision coaxial seal structure of pressure sensing assembly, which comprises a shell main body (10), a bolt locking shell seat (20) and a silica gel sealing ring (40), wherein the bolt locking shell seat (20) is arranged on the shell main body (10), and the silica gel sealing ring (40) is arranged on the bolt locking shell seat (20).

[0031] In the embodiment, the pressure sensing assembly 30 comprises a ceramic sensor core 31; the ceramic sensor core 31 is located below the pressure sensing assembly 30 and abuts against the silica gel sealing ring 40 on the lower side. The ceramic sensor core 31 directly abuts against the silica gel sealing ring 40, and the high hardness, high temperature resistance and corrosion resistance of the ceramic material ensure that the sensing end face does not deform under the impact of high-pressure steam, thereby avoiding the measurement drift caused by the creep of traditional metal materials. The ceramic core directly contacts the sealing ring to form a medium-free transmission path, eliminating the risk of silica oil degradation or stratification and improving the signal response speed and detection accuracy.

[0032] In the embodiment, the pressure sensing assembly 30 further comprises a circuit board 32 and a buffer cotton 33; the circuit board 32 is located above the ceramic sensor core 31; and the buffer cotton 33 is arranged between the circuit board 32 and the ceramic sensor core 31. The buffer cotton 33 is interposed between the ceramic sensor core 31 and the circuit board 32, absorbs mechanical vibration and thermal stress through elastic deformation, prevents the solder joints of the circuit board 32 from cracking due to high-frequency impact or sudden temperature changes, and prolongs the service life of electronic components.

[0033] In the embodiment, the inner wall of the accommodating cavity 50 is provided with a plurality of guide columns 12, and the ceramic sensor core 31 is provided with a limiting groove 34 corresponding to the guide columns 12. The cooperation structure of the guide columns 12 and the limiting groove 34 provides physical guidance when installing the ceramic sensor core 31, forcibly restricts the radial deviation, and ensures that the ceramic core and the silica gel sealing ring 40 are strictly aligned on the central axis.

[0034] Further, the silica gel sealing ring 40 is provided with a limiting notch 41 corresponding to the guide column 12. The limiting notch 41 on the silica gel sealing ring 40 precisely engages with the guide column 12, prevents the sealing ring from sliding or deforming in the circumferential direction after being pressed, and ensures that the sealing ring is always in a preset compressed state. This structure further optimizes the uniformity of the sealing interface, avoids micro-leakage caused by misalignment of the sealing ring, and is especially suitable for repeated pressure impact environment under high pressure working condition. The silica gel also effectively reaches the sealing effect according to the shape of the guide column to increase the contact area.

[0035] In the embodiment, the accommodating cavity 50 is cylindrical, and the guide posts 12 are uniformly arranged in the circumference. The cylindrical accommodating cavity 50 and the circumferentially uniformly arranged guide posts 12 form a symmetrical stress structure, so that the compression force of the shell base 20 to the shell body 10 is uniformly distributed in the circumference when the locking bolt is locked, and the risk of cavity deformation caused by local overload is eliminated.

[0036] In the embodiment, the lower portion of the accommodating cavity 50 is provided with an annular embedding groove 13 for embedding the silica gel sealing ring 40. The annular embedding groove 13 prepositions and radially limits the silica gel sealing ring 40, so as to prevent the sealing ring from overflowing to the outside or shrinking from the sealing surface due to extrusion during assembly.

[0037] In the embodiment, the outer periphery of the shell body 10 is provided with a first bolt column 14, and the shell base 20 is provided with a second bolt column 21 corresponding to the first bolt column 14. The bolt can pass through the second bolt column 21 and be locked to the first bolt column 14. The corresponding design of the first bolt column 14 and the second bolt column 21 realizes the rigid connection of the shell body 10 and the shell base 20 through the bolt penetration locking, and the bolt column itself serves as a reinforcing rib to improve the overall bending stiffness of the shell.

[0038] Further, the first bolt column 14 and the second bolt column 21 are provided with a circular limiting groove 15 and a circular limiting block 22 matched with each other. The engagement of the circular limiting groove 15 and the block realizes the prepositioning of the shell body 10 and the shell base 20 before the bolt is locked, so as to eliminate the bolt hole alignment deviation.

[0039] Of course, the utility model is not limited to the above-mentioned embodiment, and those skilled in the art can make equivalent transformation or replacement without departing from the spirit of the utility model, and these equivalent transformations and replacements are all included in the range defined by the claims of the present application.

Claims

1. A pressure sensor, characterized by, The utility model relates to a pressure sensor, including: Shell body (10), shell seat (20), pressure sensing assembly (30) and silica gel sealing ring (40); The shell body (10) and shell seat (20) are locked by several bolts, the shell body (10) is provided with pipeline connector (11) at the lower end, and is provided with the accommodation cavity (50) at the upper end, the silica gel sealing ring (40) is embedded in the lower side of the accommodation cavity (50), when the shell seat (20) is locked in the shell body (10), the pressure sensing assembly (30) can be pressed against the silica gel sealing ring (40), and the upper side of the accommodation cavity (50) is sealed.

2. The pressure sensor of claim 1, wherein: The pressure sensing assembly (30) includes ceramic sensor core (31), the ceramic sensor core (31) is located below the pressure sensing assembly (30), and the lower side is pressed against the silica gel sealing ring (40).

3. The pressure sensor of claim 2, wherein: The pressure sensing assembly (30) further includes circuit board (32) and buffer cotton (33), the circuit board (32) is located above the ceramic sensor core (31), and the buffer cotton (33) is arranged between the circuit board (32) and ceramic sensor core (31).

4. The pressure sensor of claim 2, wherein: The inner wall of the accommodation cavity (50) is provided with several guide columns (12), and the ceramic sensor core (31) is provided with a limiting groove (34) corresponding to the guide column (12).

5. The pressure sensor of claim 4, wherein: The silica gel sealing ring (40) is provided with a limiting notch (41) corresponding to the guide column (12).

6. The pressure sensor of claim 4, wherein: The accommodation cavity (50) is cylindrical, and several guide columns (12) are uniformly arranged along the circumference.

7. The pressure sensor of claim 1, wherein: The lower side of the accommodation cavity (50) is provided with annular embedding groove (13) for embedding silica gel sealing ring (40).

8. The pressure sensor of claim 1, wherein: The outer periphery of the shell body (10) is provided with first bolt column (14), and the shell seat (20) is provided with second bolt column (21) corresponding to the first bolt column (14), the bolt can pass through the second bolt column (21) and be locked in the first bolt column (14).

9. The pressure sensor of claim 8, wherein: The first bolt column (14) and the second bolt column (21) are provided with circular limiting groove (15) and circular limiting convex block (22) matched.

Images