A type of anti-loosening pressure sensor mating clip

Abstract

This invention relates to the field of pressure sensor installation technology and provides a docking clip for an anti-loosening pressure sensor. It includes a pressure sensor body and a mounting connector for docking and fixing the pressure sensor body. The bottom of the pressure sensor body is coaxially provided with a slotted threaded tube and elastic hooks distributed in a ring around the slotted threaded tube. The mounting connector has a cavity capable of accommodating the slotted threaded tube, and limiting protrusions on both sides of the cavity are provided for axial sliding limitation of the slotted threaded tube. This invention achieves initial fixing and axial feeding through the threaded engagement of the rotating retaining ring with the slotted threaded tube. After the elastic hooks engage with the retaining ring gap, a mechanical limit is formed. Even when air pressure fluctuations cause stress on the threads, the elastic hooks can still limit the axial displacement of the sensor, effectively preventing loosening. Through the dual fixing structure of threaded engagement and elastic hook holding, the problem of easy loosening in traditional threaded installations is solved.

Description

Technical Field

[0001] This utility model belongs to the field of pressure sensor installation technology, and in particular relates to a docking clip for an anti-loosening pressure sensor. Background Technology

[0002] Pressure sensors, as a commonly used detection device, are widely used in scenarios such as gas pipelines and hydraulic systems to monitor pressure changes within the system in real time. In gas pipeline applications, traditional gas pressure sensors are typically directly mounted and fixed to the gas pipeline via threaded connectors.

[0003] A pressure sensor mounting structure disclosed in prior art document CN212931768U includes a mounting plate. A fixing device is mounted on one side of the mounting plate, one end of which is located inside the mounting plate and is fixedly connected to the mounting plate. A fixing block is installed inside the fixing device. A sliding groove and a second groove are respectively formed at both ends of the fixing block. The sliding groove is located on the side of the fixing block away from the mounting plate. A pressure sensor is disposed on the side of the mounting plate away from the fixing device.

[0004] However, this traditional installation method has significant drawbacks: because the installation process relies on manual tightening, it is highly susceptible to errors that result in incomplete thread tightening. When gas pressure fluctuates within the gas pipeline, improperly tightened threaded connections can loosen, compromising the gas pipeline's sealing performance and causing gas leaks. Gas leaks not only lead to inaccurate pressure readings and affect the system's normal operation but may also pose safety hazards under certain conditions (such as when transporting flammable or explosive gases). Therefore, designing an anti-loosening locking clip for the pressure sensor is essential. Utility Model Content

[0005] To address the issues of easy loosening and poor sealing in existing pressure sensors, this invention proposes an anti-loosening pressure sensor docking clip. Through optimized mechanical structure design, it achieves precise installation positioning, dual protection against loosening, and enhanced sealing performance, effectively improving the installation stability and safety of pressure sensors in gas pipelines.

[0006] This invention is implemented as follows: a docking buckle for an anti-loosening pressure sensor includes a pressure sensor body and a mounting joint for docking and fixing the pressure sensor body. The bottom of the pressure sensor body is coaxially provided with a slotted threaded tube and elastic hooks distributed in a ring around the slotted threaded tube. The mounting joint has a cavity that can accommodate the slotted threaded tube, and the two sides of the cavity are provided with limiting protrusions for axial sliding limitation of the slotted threaded tube. The top of the mounting joint is rotatably connected to a rotating retaining ring. The rotating retaining ring has a retaining structure that, when the pressure sensor body is inserted into the bottom of the cavity, engages with the elastic hooks to dock and fix the mounting joint to the pressure sensor body.

[0007] Preferably, the slotted threaded tube has external threads on its exterior, and the bottom sides of the slotted threaded tube have strip grooves that slide in cooperation with the limiting protrusions.

[0008] Preferably, the top inner side of the mounting joint is provided with an annular cavity, and the bottom of the rotating retaining ring is provided with a limiting foot that is limited to the annular cavity.

[0009] Preferably, the limiting foot is rotatable within the annular cavity, and its inner side is provided with an internal thread that mates with the external thread.

[0010] Preferably, an inner sealing ring is fixed at the bottom of the cavity on the contact surface with the slotted threaded pipe.

[0011] Preferably, the top of the rotating retaining ring has an outer sealing ring fixed on the contact surface with the pressure sensor body.

[0012] Preferably, the elastic hook is a Z-shaped structure formed by bending a metal sheet, and its bottom is provided with an outwardly protruding arc-shaped hook head.

[0013] Preferably, the holding structure includes a first retaining ring and a second retaining ring. The vertical cross-section of the first retaining ring and the second retaining ring are both trapezoidal and symmetrically arranged vertically along the axial direction. The first retaining ring and the second retaining ring maintain a certain distance for the arc-shaped locking head of the elastic locking hook to engage.

[0014] Compared with related technologies, the anti-loosening pressure sensor docking clip provided by this utility model has the following advantages:

[0015] 1. This utility model achieves initial fixation and axial feeding through the engagement of a rotating retaining ring with the grooved threaded tube. After the elastic hook engages with the gap of the retaining ring, it forms a mechanical limit. Even when air pressure fluctuations cause the thread to be stressed, the elastic hook can still limit the axial displacement of the sensor and effectively prevent loosening. Through the dual fixing structure of thread engagement and elastic hook holding, the problem of easy loosening of traditional thread installation is solved.

[0016] 2. This utility model has a double sealing structure with an inner sealing ring at the bottom of the tube cavity and an outer sealing ring at the top of the rotating retaining ring. The inner sealing ring prevents gas in the tube cavity from leaking through the gap between the slotted threaded pipe and the tube cavity, while the outer sealing ring prevents external impurities from entering or internal gas from leaking through the gap between the sensor body and the rotating retaining ring. Compared with the single seal in traditional technology, the sealing reliability is significantly improved.

[0017] 3. The slotted threaded tube of this utility model has a sliding fit between the groove and the limiting protrusion of the tube cavity, ensuring that the sensor will not rotate circumferentially during installation and achieving precise docking; rotating the rotating retaining ring can drive the sensor to move axially through the threaded transmission until the elastic hook automatically locks in, without the need for repeated manual calibration. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a docking clip for an anti-loosening pressure sensor proposed in this utility model;

[0019] Figure 2 This is an exploded structural diagram of a docking clip for an anti-loosening pressure sensor proposed in this utility model;

[0020] Figure 3 This is a schematic diagram of the slotted threaded pipe structure proposed in this utility model;

[0021] Figure 4 This is a schematic diagram of a half-section of the installation connector proposed in this utility model;

[0022] Figure 5 This is a schematic diagram of the half-section structure of the rotating retaining ring proposed in this utility model.

[0023] In the diagram: 1. Mounting connector; 11. Annular cavity; 12. Tube cavity; 13. Limiting protrusion; 14. Inner sealing ring; 2. Rotary retaining ring; 21. Limiting foot; 22. Internal thread; 23. Outer sealing ring; 3. Pressure sensor body; 4. Slotted threaded tube; 41. External thread; 42. Strip groove; 5. Holding structure; 51. First retaining ring; 52. Second retaining ring; 6. Elastic hook. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0025] A preferred embodiment of the anti-loosening pressure sensor coupling buckle provided by this utility model is as follows: Figures 1 to 5 As shown:

[0026] A locking buckle for an anti-loosening pressure sensor includes a pressure sensor body 3, a mounting connector 1, and a rotating retaining ring 2. The specific structure and assembly method of each component are as follows:

[0027] 1. Pressure sensor body 3: It is a conventional pneumatic pressure sensor. A slotted threaded tube 4 is coaxially welded to its bottom. The external thread 41 of the slotted threaded tube 4 is M16×1.5. The bottom sides are milled with strip grooves 42. The width and depth of the strip grooves 42 are 5mm and 30mm respectively. Three elastic hooks 6 are welded around the slotted threaded tube 4 in a ring. The elastic hooks 6 are made of 65Mn spring steel sheets with a thickness of 1mm bent into a Z shape. The protrusion height of the arc-shaped hook head at the bottom is 2mm to ensure sufficient elastic deformation capacity and strength.

[0028] 2. Installation connector 1: Made of aluminum alloy, with an internal cavity 12 drilled in. The inner diameter of the cavity 12 is matched with the outer diameter of the slotted threaded pipe 4 (gap 0.1mm). Limiting protrusions 13 are milled on both sides of the cavity 12, and the size of the limiting protrusions 13 matches the strip groove 42. An inner sealing ring 14 is bonded to the bottom of the cavity 12. The inner sealing ring 14 is made of fluororubber and has a cross-sectional diameter of 3mm. An annular cavity 11 is machined on the inner side of the top of the installation connector 1, and a nitrile rubber sealing gasket is placed in the annular cavity 11.

[0029] 3. Rotary retaining ring 2: Made of stainless steel, with an integrally formed limiting foot 21 at the bottom. The outer diameter of the limiting foot 21 is adapted to the inner diameter of the annular cavity 11 to ensure flexible rotation within the annular cavity 11. The inner side of the limiting foot 21 is machined with an internal thread 22 (matching the external thread 41). An outer sealing ring 23 is bonded to the top of the rotary retaining ring 2. The material of the outer sealing ring 23 is the same as that of the inner sealing ring 14. The retaining structure 5 is welded inside the rotary retaining ring 2. The vertical cross-section of the first retaining ring 51 and the second retaining ring 52 is trapezoidal, with a short base of 3mm and a long base of 5mm. The distance between the two is 2mm, which is adapted to the arc-shaped clamping head size of the elastic clamping hook 6.

[0030] The installation process of this utility model is as follows:

[0031] Step 1: Align the slotted threaded tube 4 at the bottom of the pressure sensor body 3 with the cavity 12 of the mounting connector 1, so that the groove 42 of the slotted threaded tube 4 is aligned with the limiting protrusions 13 on both sides of the cavity 12. Then insert the slotted threaded tube 4 into the cavity 12 until the groove 42 and the limiting protrusions 13 are fully engaged (at this time, the slotted threaded tube 4 cannot rotate circumferentially).

[0032] Step 2: Rotate the rotating retainer 2 clockwise. Since the internal thread 22 of the bottom limiting foot 21 of the rotating retainer 2 meshes with the external thread 41 of the slotted threaded pipe 4, under the limiting action of the limiting protrusion 13 and the strip groove 42, the rotation of the rotating retainer 2 is converted into the downward movement of the slotted threaded pipe 4 along the axial direction of the pipe cavity 12.

[0033] Step 3: Continue rotating the rotating snap ring 2 until the lower end of the slotted threaded pipe 4 is in complete contact with the inner sealing ring 14 at the bottom of the pipe cavity 12 (at this time, the inner sealing ring 14 undergoes compression deformation to achieve internal sealing). At the same time, the elastic hook 6 at the bottom of the pressure sensor body 3 undergoes elastic deformation under the action of axial force, and the arc-shaped snap head at its bottom automatically snaps into the gap between the first retaining ring 51 and the second retaining ring 52 of the retaining structure 5 inside the rotating snap ring 2 (the arc-shaped snap head returns to its original shape to achieve mechanical limiting).

[0034] Step 4: At this point, the bottom of the pressure sensor body 3 is in complete contact with the outer sealing ring 23 at the top of the rotating retainer 2 (the outer sealing ring 23 undergoes compression deformation to achieve an external seal). The installation is complete, and the pressure sensor body 3 and the mounting connector 1 are firmly connected and double-sealed.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A docking clip for a pressure sensor against loosening, comprising a pressure sensor body (3) and a mounting joint (1) for docking and fixing the pressure sensor body (3), characterized in that, The bottom of the pressure sensor body (3) is coaxially provided with a slotted threaded tube (4) and elastic hooks (6) distributed in a ring around the slotted threaded tube (4). The mounting joint (1) is provided with a cavity (12) that can accommodate the slotted threaded tube (4), and the two sides of the cavity (12) are provided with limiting protrusions (13) for axial sliding limit of the slotted threaded tube (4). The top of the mounting joint (1) is rotatably connected with a rotating retaining ring (2). The rotating retaining ring (2) is provided with a retaining structure (5) that achieves docking and fixing of the mounting joint (1) and the pressure sensor body (3) by engaging with the elastic hooks (6) when the pressure sensor body (3) extends into the bottom of the cavity (12).

2. The docking clip for a pressure sensor of claim 1, wherein, The slotted threaded tube (4) has an external thread (41) on its outside, and the bottom sides of the slotted threaded tube (4) have strip grooves (42) that slide with the limiting protrusion (13).

3. The docking clip for a pressure sensor of claim 1, wherein, The mounting connector (1) has an annular cavity (11) on its top inner side, and the rotating retaining ring (2) has a limiting foot (21) at its bottom that is limited to the annular cavity (11).

4. The docking clip for a pressure sensor of claim 3, wherein, The limiting foot (21) can rotate within the annular cavity (11), and its inner side is provided with an internal thread (22) that mates with the external thread (41).

5. The docking clip for a pressure sensor of claim 1, wherein, The bottom of the cavity (12) is fixed with an inner sealing ring (14) on the contact surface with the slotted threaded pipe (4).

6. The docking clip for a pressure sensor of claim 1, wherein, The top of the rotating retainer (2) is fixed with an outer sealing ring (23) on the contact surface with the pressure sensor body (3).

7. The anti-loose butt buckle for pressure sensor as claimed in claim 1, wherein, The elastic hook (6) is a Z-shaped structure formed by bending a metal sheet, and its bottom is provided with an outwardly protruding arc-shaped hook head.

8. The anti-loose butt buckle for pressure sensor as claimed in claim 7, wherein, The holding structure (5) includes a first retaining ring (51) and a second retaining ring (52). The vertical cross-sections of the first retaining ring (51) and the second retaining ring (52) are both trapezoidal and are symmetrically arranged up and down along the axial direction. The first retaining ring (51) and the second retaining ring (52) maintain a certain distance for the arc-shaped locking head of the elastic hook (6) to be engaged.

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