Inner hole sealing structure of ceramic pressure sensor
By using a combined structure of limit holes, limit assembly and rubber ring in ceramic pressure sensors, the vertical prestressing problem caused by threaded connections is solved, the accuracy and stability of the sensor are improved, and the accuracy of the sensor is reduced and the accuracy of the sensor is reduced. Shake during use.
Patent Information
- Application Number
- CN202420560930.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-22
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-03-22
AI Technical Summary
The vertical prestress generated by the inner hole of the ceramic pressure sensor during the threaded connection affects the sensor accuracy.
A ceramic pressure sensor inner hole sealing structure is designed. Through the combination of limit holes, limit assembly and rubber ring, the position and movement of the sensor body are restricted, and the bolts are avoided directly connecting to the sensor body and preventing prestressing from torque.
It effectively avoids the reduction of sensor accuracy, ensures the position stability and use effect of the sensor, and prevents the sensor from shaking during use.
Smart Images
Figure CN222299029U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sealing structures, in particular to an inner hole sealing structure of a ceramic pressure sensor. Background Art
[0002] The corrosion-resistant ceramic pressure sensor has no liquid transmission. The pressure acts directly on the front surface of the ceramic diaphragm, causing the diaphragm to deform slightly. The thick film resistor is printed on the back of the ceramic diaphragm and connected to form a Wheatstone bridge (closed bridge). Due to the piezoresistive effect of the varistor, the bridge generates a highly linear voltage signal that is proportional to the pressure and also proportional to the excitation voltage.
[0003] In the prior art, a Chinese patent with announcement number CN212903664U proposes an inner hole sealing structure of a ceramic pressure sensor, which helps to improve the inspection accuracy of the sensor body by avoiding friction between the sensor body and the side wall of the inner cavity. At the same time, by arranging a positioning rubber pad between the clamping ring and the circuit board, it helps to reduce the pressure of the clamping ring on the circuit board when the device is placed in daily life, which helps to extend the service life of the circuit board. However, in actual application, when the ceramic pressure sensor is fixed by a threaded connection, in order to fix the ceramic pressure sensor, the bolt is directly connected to the inner hole of the ceramic pressure sensor. The torque generated in the tightening direction of the bolt will generate vertical prestress on the inner hole of the ceramic pressure sensor, resulting in a problem affecting the accuracy of the ceramic pressure sensor. Therefore, we disclose an inner hole sealing structure of a ceramic pressure sensor. Utility Model Content
[0004] In view of this, the purpose of the present invention is to propose an inner hole sealing structure of a ceramic pressure sensor to solve the problem that the inner hole of the ceramic pressure sensor generates vertical prestress, which affects the accuracy of the ceramic pressure sensor.
[0005] Based on the above purpose, the utility model provides an inner hole sealing structure of a ceramic pressure sensor, including a first connecting shell, one end of the first connecting shell is fixedly connected to a second connecting shell by a plurality of first bolts, a limiting hole is opened in the middle of the first connecting shell, a sensor body is arranged in the limiting hole, a limiting component is arranged in the middle of the limiting hole, the limiting component is used to limit the position of the sensor body, and the limiting component is connected to the limiting hole.
[0006] Preferably, the limiting assembly includes limiting grooves opened at both ends of the limiting hole, limiting blocks are slidably connected in the limiting grooves, a second limiting shell is fixedly connected to the middle parts of the two limiting blocks, a first limiting shell is fixedly connected to the middle part of the second limiting shell, the first limiting shell is adapted to the inner hole of the sensor body, and a second bolt is threadedly connected to the middle parts of the first limiting shell and the second limiting shell.
[0007] Preferably, the limiting hole is an inverted T-shaped hole, and the upper end of the limiting hole is adapted to the sensor body.
[0008] Preferably, a circuit board is connected and placed on the upper end of the limiting hole.
[0009] Preferably, the second bolt is threadedly connected to the second connecting shell.
[0010] Preferably, a limiting ring is fixedly connected in the limiting hole, and a plurality of rubber rings are fixedly connected to the inner wall of the limiting ring.
[0011] Preferably, the rubber ring is in contact with the outer wall of the sensor body.
[0012] Preferably, the limiting ring is located in the middle of the second limiting shell.
[0013] Preferably, the limiting blocks are symmetrically distributed about the longitudinal center axis of the second limiting shell.
[0014] Preferably, the length of the limiting groove is greater than the length of the limiting block.
[0015] The beneficial effects of the utility model are as follows: by limiting the moving position of the second limiting shell, the second limiting shell is prevented from rotating; the second limiting shell limits the position of the sensor body through the first limiting shell, thereby preventing the sensor body from moving vertically; the second bolt limits the position of the first limiting shell and the sensor body after adaptation, thereby ensuring the position limiting effect of the sensor body; and also avoiding the problem that the second bolt is directly connected to the sensor body, thereby preventing the sensor body from being subjected to the torsion of the second bolt to generate vertical prestress, thereby affecting the accuracy of the sensor body, thereby ensuring the use effect of the sensor body;
[0016] The first connecting shell limits the position of the rubber ring through the limiting ring, so that the rubber ring can limit the horizontal position of the sensor body after being attached to the sensor body, thereby avoiding shaking of the sensor body during use and affecting the use effect of the sensor body. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 It is a schematic diagram of an embodiment of the utility model;
[0019] Figure 2It is a partially cutaway three-dimensional structural schematic diagram of the first connecting shell of the utility model;
[0020] Figure 3 It is a schematic diagram of the connection structure of the sensor body of the utility model.
[0021] The markings in the figure are:
[0022] 1. First connecting shell; 2. First bolt; 3. Second connecting shell; 4. Limiting hole; 5. Limiting ring; 6. Rubber ring; 7. Sensor body; 8. First limiting shell; 9. Second limiting shell; 10. Limiting block; 11. Limiting groove; 12. Second bolt. DETAILED DESCRIPTION
[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.
[0024] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0025] like Figure 1-Figure 3As shown, the inner hole sealing structure of the ceramic pressure sensor includes a first connecting shell 1, one end of the first connecting shell 1 is fixedly connected to the second connecting shell 3 by a plurality of first bolts 2, a limiting hole 4 is provided in the middle of the first connecting shell 1, a sensor body 7 is arranged in the limiting hole 4, a limiting component is provided in the middle of the limiting hole 4, the limiting component is used to limit the position of the sensor body 7, the limiting component is connected to the limiting hole 4, the limiting component includes limiting grooves 11 provided at both ends of the limiting hole 4, a limiting block 10 is slidably connected in the limiting groove 11, a second limiting shell 9 is fixedly connected to the middle of the two limiting blocks 10, a first limiting shell 8 is fixedly connected to the middle of the second limiting shell 9, the first limiting shell 8 is adapted to the inner hole of the sensor body 7, the first limiting shell 8 and the second limiting shell 9 is threadedly connected with a second bolt 12 in the middle part, the limiting hole 4 is an inverted T-shaped hole, the upper end of the limiting hole 4 is adapted to the sensor body 7, and a circuit board is placed on the upper end of the limiting hole 4, the second bolt 12 is threadedly connected to the second connecting shell 3, the limiting block 10 is symmetrically distributed with the longitudinal center axis of the second limiting shell 9, the length of the limiting groove 11 is greater than the length of the limiting block 10, when in use, the second connecting shell 3 is fixedly connected through one end of the first connecting shell 1 through a plurality of first bolts 2, a limiting hole 4 is opened in the middle part of the first connecting shell 1, and a sensor body 7 is arranged in the limiting hole 4, so that the sensor body 7 placed in the first connecting shell 1 is easy to replace, which is convenient for the staff to carry out the later maintenance work, and a limiting component is arranged in the middle part of the limiting hole 4 The limit assembly is used to limit the position of the sensor body 7, so that the position of the sensor body 7 placed in the inner cavity of the limit hole 4 is fixed, and the sensor body 7 is prevented from moving when in use, so that the measurement result of the sensor body 7 is more accurate. The limit assembly includes limit grooves 11 opened at both ends of the limit hole 4, and the limit blocks 10 are slidably connected in the limit grooves 11. The middle parts of the two limit blocks 10 are fixedly connected with the second limit shell 9, so that the first connecting shell 1 limits the moving position of the limit block 10 through the limit hole 4 and the limit groove 11, thereby limiting the moving position of the second limit shell 9 and preventing the second limit shell 9 from rotating. The first limit shell 8 is fixedly connected with the middle part of the second limit shell 9, and the first limit shell 8 is adapted to the inner hole of the sensor body 7, so that The second limiting shell 9 limits the position of the sensor body 7 through the first limiting shell 8 to prevent the sensor body 7 from moving vertically. The second bolt 12 is threadedly connected to the middle of the first limiting shell 8 and the second limiting shell 9, so that the second bolt 12 limits the position of the first limiting shell 8 and the sensor body 7 after adaptation, thereby ensuring the position limiting effect of the sensor body 7. It also avoids the problem that the second bolt 12 is directly connected to the sensor body 7 so that the sensor body 7 is subjected to the torsion of the second bolt 12 to generate vertical prestress, thereby affecting the accuracy of the sensor body 7, thereby ensuring the use effect of the sensor body 7. The limiting hole 4 is an inverted T-shaped hole, and the upper end of the limiting hole 4 is adapted to the sensor body 7. The upper end of the limiting hole 4 is connected and placed with a circuit board.The sensor body 7 is not affected by the limiting hole 4 in normal use, and the pressure of the circuit board is detected. The position of the second limiting shell 9 is also effectively limited. The second bolt 12 is threadedly connected with the second connecting shell 3, so that the second connecting shell 3 limits the position of the second bolt 12, thereby fixing the relative positions of the first connecting shell 1, the second connecting shell 3 and the second bolt 12. The limiting block 10 is symmetrically distributed with the longitudinal center axis of the second limiting shell 9, and the length of the limiting groove 11 is greater than the length of the limiting block 10, so that the second limiting shell 9 will not rotate with the second bolt 12, so that the limiting block 10 can adjust the position according to the size of the sensor body 7, so that the practicality of the limiting block 10 is better.
[0026] As a preferred implementation in this embodiment, Figure 2 and Figure 3 As shown, a limiting ring 5 is fixedly connected in the limiting hole 4, and a plurality of rubber rings 6 are fixedly connected to the inner wall of the limiting ring 5. The rubber ring 6 is fitted with the outer wall of the sensor body 7. The limiting ring 5 is located in the middle of the second limiting shell 9. The limiting ring 5 is fixedly connected in the limiting hole 4, and a plurality of rubber rings 6 are fixedly connected to the inner wall of the limiting ring 5, so that the first connecting shell 1 limits the position of the rubber ring 6 through the limiting ring 5, so that the rubber ring 6 can limit the horizontal position of the sensor body 7 after fitting with the sensor body 7, thereby avoiding shaking of the sensor body 7 during use and affecting the use effect of the sensor body 7.
[0027] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.
[0028] The utility model is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.
Claims
1. An inner hole sealing structure of a ceramic pressure sensor, comprising a first connecting shell (1), characterized in that: One end of the first connecting shell (1) is fixedly connected to the second connecting shell (3) via a plurality of first bolts (2); a limiting hole (4) is provided in the middle of the first connecting shell (1); a sensor body (7) is arranged in the limiting hole (4); a limiting component is provided in the middle of the limiting hole (4); the limiting component is used to limit the position of the sensor body (7); and the limiting component is connected to the limiting hole (4).
2. The inner hole sealing structure of the ceramic pressure sensor according to claim 1, characterized in that: The limiting assembly comprises limiting grooves (11) formed at both ends of the limiting hole (4), limiting blocks (10) being slidably connected in the limiting grooves (11), a second limiting shell (9) being fixedly connected in the middle of the two limiting blocks (10), a first limiting shell (8) being fixedly connected in the middle of the second limiting shell (9), the first limiting shell (8) being adapted to the inner hole of the sensor body (7), and a second bolt (12) being threadedly connected in the middle of the first limiting shell (8) and the second limiting shell (9).
3. The inner hole sealing structure of the ceramic pressure sensor according to claim 1, characterized in that: The limiting hole (4) is an inverted T-shaped hole, and the upper end of the limiting hole (4) is adapted to the sensor body (7).
4. The inner hole sealing structure of the ceramic pressure sensor according to claim 1, characterized in that: A circuit board is placed on the upper end of the limiting hole (4).
5. The inner hole sealing structure of the ceramic pressure sensor according to claim 2, characterized in that: The second bolt (12) is threadedly connected to the second connecting shell (3).
6. The inner hole sealing structure of the ceramic pressure sensor according to claim 2, characterized in that: A limiting ring (5) is fixedly connected inside the limiting hole (4), and a plurality of rubber rings (6) are fixedly connected to the inner wall of the limiting ring (5).
7. The inner hole sealing structure of the ceramic pressure sensor according to claim 6, characterized in that: The rubber ring (6) is fitted onto the outer wall of the sensor body (7).
8. The inner hole sealing structure of the ceramic pressure sensor according to claim 6, characterized in that: The limiting ring (5) is located in the middle of the second limiting shell (9).
9. The inner hole sealing structure of the ceramic pressure sensor according to claim 2, characterized in that: The limiting blocks (10) are symmetrically distributed about the longitudinal center axis of the second limiting shell (9).
10. The inner hole sealing structure of the ceramic pressure sensor according to claim 2, characterized in that: The length of the limiting groove (11) is greater than the length of the limiting block (10).