High-stability pressure sensor

Abstract

The utility model relates to a high-stability pressure sensor which comprises an end cover, the end cover is sleeved with a shell, a pressure sensing module is arranged in the end cover, one end of the pressure sensing module is connected with an electrostatic discharge elastic piece, the electrostatic discharge elastic piece comprises a U-shaped connecting plate, and the end of the short section of the connecting plate is connected with an abutting section abutting against the shell. The end of the long section of the connecting plate is connected with an extending section in the horizontal direction, the extending section is connected with a contact section making contact with a pressure sensing module, two elastic plates are arranged on the long section of the connecting plate and are obliquely arranged relative to the vertical direction, and the inner side of the end cover is provided with a containing groove for containing an electrostatic discharge elastic piece. One end face of the connecting plate makes contact with the end cover, and the ends of the two elastic plates abut against the inner side wall of the containing groove. The application has the effect of ensuring the performance stability of the pressure sensor.

Description

Technical Field

[0001] The present application relates to the technical field of pressure sensors, and in particular to a high-stability pressure sensor. Background Art

[0002] The pressure sensor is a sensor used to detect the medium pressure in the pipeline. The medium pressure is connected to the pipeline through the through hole opened on the pressure sensor, and can be directly detected by the pressure sensing module, and the signal is transmitted to the outside through the wire.

[0003] Traditional pressure sensors will vibrate when impacted by flowing liquid or shaking of pipes. The electrostatic release shrapnel installed on the pressure sensing module will be subjected to repeated vibrations, which will cause the electrostatic release shrapnel to shift. The end of the electrostatic release shrapnel will detach from the pressure sensing module, causing a short circuit, leading to the failure of the electrostatic release shrapnel and affecting the performance stability of the pressure sensor. Utility Model Content

[0004] In order to ensure the stability of the performance of the pressure sensor, the present application provides a high-stability pressure sensor.

[0005] The high stability pressure sensor provided in this application adopts the following technical solution:

[0006] A high-stability pressure sensor comprises an end cover, wherein the end cover is provided with a shell, a pressure sensing module is arranged inside the end cover, one end of the pressure sensing module is connected to an electrostatic release spring, the electrostatic release spring comprises a U-shaped connecting plate, the end of a shorter section of the connecting plate is connected to a resistance section that resists the shell, the end of a longer section of the connecting plate is connected to an extension section in the horizontal direction, the extension section is connected to a contact section that contacts the pressure sensing module, two elastic plates are arranged on the longer section of the connecting plate, both of the elastic plates are inclined relative to the vertical direction, a placement groove for placing the electrostatic release spring is arranged on the inner side of the end cover, one end face of the connecting plate contacts the end cover, and the ends of the two elastic plates resist the inner side wall of the placement groove.

[0007] By adopting the above technical solution, the electrostatic release spring is used to protect the pressure sensor from electrostatic interference and ensure the performance and stability of the pressure sensor. The electrostatic release spring is inserted into the placement slot, and pressure deformation is applied to the two elastic plates and then the spring is inserted into the placement slot. At this time, the electrostatic release spring fits tightly with the end cover under the action of elastic force, reducing the possibility of displacement of the electrostatic release spring due to vibration, thereby ensuring the stability of the pressure sensor.

[0008] Optionally, a limiting boss for limiting the upward lifting height of the contact segment is provided on the end cover, the contact segment is inclined downward relative to the horizontal direction, and the end of the contact segment is horizontally arranged and contacts the pressure sensing module.

[0009] By adopting the above technical solution, when the electrostatic release spring is inserted into the placement slot, the contact section contacts the pressure sensing module, and the contact section is deformed by pressure. Even if the electrostatic release spring vibrates and deviates, the contact section always contacts the pressure sensing module due to elastic deformation, reducing the risk of the electrostatic release spring detaching from the pressure sensing module and causing a circuit break. In addition, by setting a limit boss to limit the lifting height of the contact section, the working stability of the pressure sensor is further ensured.

[0010] Optionally, a plurality of magnets are provided on one end of the bottom surface of the end cover that contacts the connecting plate.

[0011] By adopting the above technical solution, the two elastic plates of the electrostatic release spring are elastically deformed and inserted into the placement slot, providing the electrostatic release spring with a clamping force on the end cover. However, the elastic plate is prone to failure after a long period of deformation, and the clamping force provided is reduced. The magnet adsorbs the connecting plate to the end cover through adsorption force, assisting the elastic plate to stabilize the electrostatic release spring, thereby ensuring the stability of the pressure sensor.

[0012] Optionally, a pressure port is opened at the bottom of the shell, and the pressure port is connected to the pressure sensing module. A first sealing ring is arranged between the shell and the pressure sensing module, and the upper surface of the sealing ring contacts the pressure sensing module, and the lower surface of the sealing ring contacts the shell.

[0013] By adopting the above technical solution, when performing pressure detection, liquid flows into the pressure sensor from the pressure port, and the pressure port is directly connected to the pressure sensing module. By providing a first sealing ring, liquid is prevented from flowing into the wiring board above the pressure sensing module to cause a short circuit.

[0014] Optionally, the end cover is provided with an empty groove on the outer side of the placement groove, a shorter section of the connecting plate contacts the empty groove, and the abutting section is inclined relative to the vertical direction and abuts against the shell.

[0015] By adopting the above technical solution, during the process of assembling the pressure sensor, the electrostatic release spring is inserted from the bottom of the end cover along the placement groove, and then the shell is combined with the end cover from the bottom. Since the interference section is inclined relative to the vertical direction, during installation, the shell and the end of the interference section slide relative to each other, which is convenient for the operator to install the shell.

[0016] Optionally, the shell outer shell is provided with a second sealing ring, and the inner side of the second sealing ring abuts against the shell.

[0017] By adopting the above technical solution, the pressure sensor is connected to the pipeline to be tested, and the second sealing ring is set to prevent the water in the pipeline from flowing out from one side of the pressure sensor, causing pressure release and reducing the sensing accuracy. At the same time, the second sealing ring can prevent the relative sliding between the pressure sensor and the pipeline from affecting the sensing accuracy. Therefore, the performance stability of the pressure sensor is guaranteed.

[0018] Optionally, a mounting groove is provided on the outer circular side wall of the end cover, a third sealing ring is sleeved in the mounting groove, and the outer circle of the third sealing ring contacts the shell.

[0019] By adopting the above technical solution and providing the third sealing ring, the possibility of relative sliding between the end cover and the housing is reduced under the action of friction resistance, and the stability of the pressure sensor performance is ensured.

[0020] In summary, the present application includes at least one of the following beneficial technical effects:

[0021] 1. By setting the end cover, placement slot, electrostatic release spring and elastic plate, the electrostatic release spring is inserted along the placement slot. At this time, the two elastic plates are inserted into the placement slot after applying pressure and deformation. The electrostatic release spring fits tightly with the end cover under the action of elastic force, reducing the possibility of the electrostatic release spring being deflected by vibration, and ensuring the working stability of the pressure sensor;

[0022] 2. By setting the limiting boss and the contact section, the contact section contacts the pressure sensing module. At this time, the contact section is deformed by pressure. Even if the electrostatic release spring vibrates and deviates, the contact section always contacts the pressure sensing module due to elastic deformation, reducing the risk of the electrostatic release spring detaching from the pressure sensing module and causing a circuit break. In addition, by setting the limiting boss, the lifting height of the contact section is limited, further ensuring the stability of the pressure sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of this application.

[0024] Figure 2 It is a cross-sectional view of the pressure sensor in the embodiment of the present application.

[0025] Figure 3 It is a schematic diagram of the end cover structure in the embodiment of the present application.

[0026] Figure 4 It is a schematic diagram of the electrostatic release spring structure in an embodiment of the present application.

[0027] Explanation of the reference numerals in the accompanying drawings: 1. End cover; 2. Pressure transmission terminal; 3. Pressure transmission spring; 5. Shell; 6. Mounting groove; 7. Third sealing ring; 8. Pressure port; 9. First sealing ring; 10. Second sealing ring; 11. Electrostatic release spring; 12. Connecting plate; 13. Resistance section; 15. Extension section; 16. Contact section; 17. Elastic plate; 18. Placement groove; 19. Limiting boss; 20. Empty groove; 21. Magnet; 22. Pressure sensing module. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-4 This application is described in further detail.

[0029] The embodiment of the present application discloses a high stability pressure sensor. Figure 1 and Figure 2 A high-stability pressure sensor includes an end cover 1, a pressure transmission terminal 2 is pierced on the end cover 1, a pressure transmission spring 3 is arranged inside the end cover 1, one end of the pressure transmission spring 3 is connected to the upper surface of the end cover 1, and the other end of the pressure transmission spring 3 is connected to the pressure sensing module 22, and the end of the pressure transmission spring 3 is elastically deformed and abuts against the upper surface of the pressure sensing module 22.

[0030] Reference Figure 1 and Figure 2 A shell 5 is provided on the outer sleeve of the end cover 1, and a mounting groove 6 is opened on the outer circular side wall of the end cover 1 along the circumferential direction of the end cover 1. In order to prevent relative sliding between the end cover 1 and the outer shell, a third sealing ring 7 is sleeved in the mounting groove 6, and the outer circle of the third sealing ring 7 contacts the shell 5.

[0031] Reference Figure 1 and Figure 2 A pressure port 8 is provided below the housing 5, and the pressure port 8 is connected to the pressure sensing module 22. A first sealing ring 9 is provided between the housing 5 and the pressure sensing module 22, and the upper surface of the first sealing ring 9 contacts the pressure sensing module 22, and the lower surface of the first sealing ring 9 contacts the housing 5. In order to prevent leakage and sliding between the pressure sensor and the external pipeline to be measured, a second sealing ring 10 is sleeved on the outer side of the housing 5, and the inner side of the second sealing ring 10 contacts the housing 5.

[0032] Reference Figure 2 , Figure 3 and Figure 4 One end of the pressure sensing module 22 is connected to an electrostatic release spring 11, which includes a connecting plate 12, and the connecting plate 12 is U-shaped. The side of the connecting plate 12 close to the end cover 1 contacts the lower surface of the end cover 1, and the end of the shorter section of the connecting plate 12 is connected to a contact section 13 that contacts the shell 5, and the contact section 13 is inclined relative to the vertical direction.

[0033] Reference Figure 2 , Figure 3 and Figure 4 The end of the longer section of the connecting plate 12 is connected to an extension section 15 in the horizontal direction. The extension section 15 is connected to a contact section 16 that contacts the pressure sensing module 22. The contact section 16 is tilted downward relative to the horizontal direction, and the end of the contact section 16 is arranged horizontally. After the contact section 16 is deformed by pressure, it contacts the pressure sensing module 22. Two elastic plates 17 are arranged on the longer section of the connecting plate 12. Both elastic plates 17 are arranged tilted relative to the vertical direction and are arranged on both sides of the connecting plate 12. A placement groove 18 for placing the electrostatic release spring 11 is arranged on the inner side of the end cover 1. An end surface of the connecting plate 12 close to the end cover 1 contacts the end cover 1, and the ends of the two elastic plates 17 contact the inner side wall of the placement groove 18. In order to more effectively prevent the contact section 16 from being separated from the pressure sensing module 22, a limiting boss 19 is arranged at the end cover 1 located above the contact section 16.

[0034] Reference Figure 2 , Figure 3 and Figure 4 In order to facilitate the installation of the shell 5 and the electrostatic release spring 11, the electrostatic release spring 11 is placed on the end cover 1, and a hollow groove 20 is opened on the side close to the shell 5. A shorter section of the connecting plate 12 is placed in the hollow groove 20. When the shell 5 is installed, the shell 5 and the end of the abutment section 13 slide relative to each other.

[0035] Reference Figure 2 , Figure 3 and Figure 4 In order to prevent the two elastic plates from failing after long-term elastic deformation and reducing the clamping force between the end cover 1, two magnets 21 are arranged at one end of the bottom surface of the end cover 1 that contacts the connecting plate 12. The two magnets 21 are arranged diagonally and embedded in the end cover 1.

[0036] The implementation principle of a high-stability pressure sensor in the embodiment of the present application is as follows: when installing the electrostatic release spring 11, pressure is applied to the two elastic plates 17 to deform them, and they are inserted upward from the bottom of the end cover 1 along the placement groove 18, so that the elastic plate 17 is pressed against the side wall of the placement groove 18 to prevent the electrostatic release spring 11 from deflecting, and the third sealing ring 7 prevents the relative sliding between the end cover 1 and the shell 5. Then the pressure sensing module 22 is installed, and the shell 5 is combined with the end cover 1 from the bottom to the top, and the abutment section 13 slides relative to the shell 5. At the same time, the contact section 16 is deformed after being subjected to pressure, and the end of the contact section 16 abuts against the top of the pressure sensing module 22. The limiting boss 19 on the end cover 1 limits the lifting height of the contact section 16 to prevent the electrostatic release spring 11 from deflecting and causing a short circuit, thereby affecting the performance stability of the pressure sensor. The electrostatic release spring 11 is adsorbed on the end cover 1 by the magnet 21 to prevent the elastic plate 17 from picking up the abutment force after the elastic failure, causing the electrostatic release spring 11 to deflect and shake, thereby affecting the performance stability of the pressure sensor;

[0037] The liquid in the pipeline to be tested enters from the pressure port 8 and directly contacts the bottom of the pressure sensing module 22. The first sealing ring 9 is provided to prevent liquid leakage from causing a short circuit. The second sealing ring 10 prevents relative sliding between the pressure sensor and the pipeline and prevents liquid leakage. Then, the pressure signal is output to the outside through the pressure transmission spring 3 and the pressure transmission terminal 2.

[0038] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high stability pressure sensor, comprising an end cap (1), characterized in that: The end cover (1) is provided with a shell (5) on its outer cover, and a pressure sensing module (22) is provided inside the end cover (1). One end of the pressure sensing module (22) is connected to an electrostatic release spring (11), and the electrostatic release spring (11) comprises a U-shaped connecting plate (12). The end of a shorter section of the connecting plate (12) is connected to a resisting section (13) that resists the shell (5), and the end of a longer section of the connecting plate (12) is connected to an extending section (15) in a horizontal direction, and the extending section (15) is ) is connected to a contact section (16) that contacts the pressure sensing module (22), two elastic plates (17) are arranged on a longer section of the connecting plate (12), and the two elastic plates (17) are arranged at an angle relative to the vertical direction. A placement groove (18) for placing the electrostatic release spring (11) is arranged on the inner side of the end cover (1), one end face of the connecting plate (12) contacts the end cover (1), and the ends of the two elastic plates (17) abut against the inner wall of the placement groove (18).

2. A high stability pressure sensor according to claim 1, characterized in that: The end cover (1) is provided with a limiting boss (19) for limiting the upward lifting height of the contact section (16); the contact section (16) is inclined downward relative to the horizontal direction; and the end of the contact section (16) is arranged horizontally and contacts the pressure sensing module (22).

3. A high stability pressure sensor according to claim 1, characterized in that: A plurality of magnets (21) are provided on one end of the bottom surface of the end cover (1) that contacts the connecting plate (12).

4. A high stability pressure sensor according to claim 1, characterized in that: A pressure port (8) is provided at the bottom of the shell (5), and the pressure port (8) is connected to the pressure sensing module (22). A first sealing ring (9) is provided between the shell (5) and the pressure sensing module (22), and the upper surface of the sealing ring contacts the pressure sensing module (22), and the lower surface of the sealing ring contacts the shell (5).

5. A high stability pressure sensor according to claim 1, characterized in that: The end cover (1) is provided with an empty groove (20) on the outer side of the placement groove (18), a shorter section of the connecting plate (12) is placed in the empty groove (20), and the abutting section (13) is arranged obliquely relative to the vertical direction and abuts against the shell (5).

6. A high stability pressure sensor according to claim 1, characterized in that: The outer shell of the shell (5) is provided with a second sealing ring (10), and the inner side of the second sealing ring (10) abuts against the shell (5).

7. A high stability pressure sensor according to claim 1, characterized in that: An installation groove (6) is provided on the outer circular side wall of the end cover (1), a third sealing ring (7) is sleeved in the installation groove (6), and the outer circle of the third sealing ring (7) contacts the housing (5).

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