Protective device for pressure sensor

Abstract

The utility model relates to the field of pressure sensors, and discloses a protective device for a pressure sensor, which comprises a protective shell, an adsorption disc, a rubber sleeve and a contact rubber ring, the bottom end of the protective shell is flexibly connected with the adsorption disc, the rubber sleeve is arranged in the protective shell, and the surface of the inner ring of the protective shell is glued with the contact rubber ring. The inner ring of the contact rubber ring tightly abuts against the surface of the outer ring of the rubber sleeve, the top end of the interior of the protective shell abuts against the top end of the exterior of the rubber sleeve, an adsorption disc is arranged at the bottom end of the protective shell, and a one-way valve is arranged on the adsorption disc, so that gas in an inner cavity of the adsorption disc can only be exhausted outwards, and the internal and external pressure difference is large; and the sealing gland is arranged, so that external air can enter the inner cavity of the adsorption disc, and the adsorption disc is convenient to take down.

Description

Technical Field

[0001] The utility model relates to the field of pressure sensors, in particular to a protective device for pressure sensors. Background Art

[0002] A pressure sensor is a device or apparatus that can sense pressure signals and convert them into usable output electrical signals according to certain rules. It is widely used in various industrial automatic control environments.

[0003] Chinese patent number CN208887806U records an improved protective device for a pressure sensor, which mainly includes a main shell. The user connects the unmounted pressure sensor wire through a rubber pad to the pressure sensor, then installs the pressure sensor at a predetermined position in a predetermined manner, then sleeves the rubber inner wall of the utility model on the pressure sensor, and finally uses screws and screw holes provided in the utility model to install the utility model on the mounting surface around the pressure sensor.

[0004] With respect to the above-mentioned related technologies, the inventor believes that there are the following defects: In the above-mentioned structure, the main housing is fixed to the surface of the device where the sensor is installed by screws. Most pressure sensors have threaded connection terminals and are installed by threads. When installing with the above-mentioned structure, it is generally necessary to open corresponding threaded holes on the surface of the device before installation. Some pipes, oil tanks and other equipment cannot have holes due to the special structure of the equipment, which makes it impossible to install them effectively. For this reason, we designed a protective device for pressure sensors. Utility Model Content

[0005] In order to solve the technical problem of quickly installing a protective shell, the utility model provides a protective device for a pressure sensor.

[0006] The utility model is implemented by the following technical scheme: a protective device for a pressure sensor, comprising a protective shell, an adsorption disk, a rubber sleeve and a contact rubber ring, wherein the bottom end of the protective shell is softly connected with the adsorption disk, the rubber sleeve is arranged inside the protective shell, the inner ring surface of the protective shell is glued with a contact rubber ring, the inner ring of the contact rubber ring is tightly abutted with the outer ring surface of the rubber sleeve, and the inner top of the protective shell is abutted with the outer top of the rubber sleeve.

[0007] As a further improvement of the above solution, the protective shell includes a straight pipe section and a contact section, and the contact rubber ring is arranged on the inner wall of the contact section. When the protective shell is sleeved on the rubber sleeve, the contact rubber ring can fit tightly to the contact section, thereby improving the sealing effect and making the connection of the adsorption plate more secure.

[0008] The rubber sleeve includes an inner straight tube and a widened section. The outer diameter of the inner straight tube is smaller than the inner diameter of the straight tube section, and the width of the widened section is smaller than the length of the contact section. The inner walls therebetween will not directly contact each other, and the force transmitted to the internal sensor when the protective shell is hit will also be reduced, thereby improving the protection effect.

[0009] As a further improvement of the above scheme, a threading hole is formed through the top of the straight tube section, and a circular hole is formed through the top of the inner straight tube. The threading hole completely overlaps with the circular hole, so that the electrical connection on the sensor can pass through the threading hole to connect with external components.

[0010] As a further improvement of the above scheme, an air outlet pipe is integrally formed on the right side of the outer ring surface of the adsorption plate, and the air outlet pipe is connected to the bottom end of the inner part of the adsorption plate. A one-way valve is threadedly installed on the air outlet pipe. The one-way valve allows the gas in the inner cavity of the adsorption plate to be discharged outward only, so that the pressure difference between the inside and the outside is large, thereby improving the adsorption firmness.

[0011] As a further improvement of the above scheme, a connecting pipe is integrally formed on the left side of the outer ring surface of the adsorption plate, and the connecting pipe is connected to the bottom end of the inner part of the adsorption plate, and a sealing cover is installed on the connecting pipe. The sealing cover can be detached from the connecting pipe as needed, thereby allowing external gas to enter the inner cavity of the adsorption plate, making it easy to remove.

[0012] As a further improvement of the above scheme, a threaded rod is provided at the lower end of the sealing gland, and a communication port is formed by removing a portion of the outer ring surface of the threaded rod, and the bottom end of the communication port is connected with the inner cavity of the adsorption disk. After the sealing gland is deflected counterclockwise, the threaded rod moves up, and the communication port is exposed, thereby enabling the outside to communicate with the inner cavity of the adsorption disk;

[0013] The threaded rod is threadedly connected to the connecting pipe, and a sealing gasket is pressed between the bottom end of the sealing gland and the top end of the connecting pipe. The clockwise deflection of the sealing gland can make the sealing gasket tightly pressed between the sealing gland and the connecting pipe, thereby improving the sealing performance.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The utility model sleeves a rubber sleeve and a protective shell on the outside of the pressure sensor, and makes the inner wall of the protective shell not directly contact with the inner wall of the rubber sleeve. When the protective shell is hit, the force transmitted to the internal sensor will be reduced. The rubber sleeve itself has a certain elasticity, which can improve the protection effect by playing a buffering effect;

[0016] 2. An adsorption plate is arranged at the bottom of the protective shell, and a one-way valve is arranged on the adsorption plate, so that the gas in the inner cavity of the adsorption plate can only be discharged outward, so that the pressure difference between the inside and the outside is large, and the adsorption firmness is improved. The sealing pressure cover can further allow external gas to enter the inner cavity of the adsorption plate, making it easy to remove. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the overall structure of a protective device for a pressure sensor provided by the utility model;

[0018] Figure 2 for Figure 1 Schematic diagram of local section;

[0019] Figure 3 for Figure 1 A top view of

[0020] Figure 4 for Figure 3 Schematic diagram of the cross section at AA;

[0021] Figure 5 for Figure 4 The enlarged schematic diagram of point B in the middle;

[0022] Figure 6 for Figure 1 Schematic diagram of the structure of the middle rubber sleeve.

[0023] Description of main symbols:

[0024] 1. Protective shell; 11. Straight pipe section; 12. Contact section; 13. Threading hole; 2. Adsorption plate; 21. Air outlet pipe; 22. Connecting pipe; 3. One-way valve; 4. Sealing gland; 41. Threaded rod; 42. Connecting port; 5. Rubber sleeve; 51. Inner straight pipe; 52. Widened section; 6. Contact rubber ring. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0026] Example:

[0027] Please combine Figure 1-Figure 6A protective device for a pressure sensor in this embodiment includes a protective shell 1, an adsorption disk 2, a rubber sleeve 5 and a contact rubber ring 7. The bottom end of the protective shell 1 is softly connected with the adsorption disk 2. The adsorption disk 2 and the protective shell 1 have certain flexibility, so that when the protective shell 1 shakes within a certain degree, it will not affect the adsorption of the adsorption disk 2. The rubber sleeve 5 is arranged inside the protective shell 1, and the inner ring surface of the protective shell 1 is glued with a contact rubber ring 7. The inner ring of the contact rubber ring 7 is tightly abutted with the outer ring surface of the rubber sleeve 5, and the inner top of the protective shell 1 is abutted with the outer top of the rubber sleeve 5.

[0028] The protective housing 1 includes a straight pipe section 11 and a contact section 12. The contact rubber ring 7 is arranged on the inner wall of the contact section 12. When the protective housing 1 is sleeved on the rubber sleeve 5, the contact rubber ring 7 can fit the contact section 12 tightly, thereby improving the sealing effect and making the connection of the adsorption plate 2 more secure.

[0029] The rubber sleeve 5 includes an inner straight tube 51 and a widened section 52. The outer diameter of the inner straight tube 51 is smaller than the inner diameter of the straight tube section 11, and the width of the widened section 52 is smaller than the length of the contact section 12. The inner walls therebetween will not be in direct contact, and the force transmitted to the internal sensor when the protective shell 1 is hit will also be reduced, thereby improving the protection effect.

[0030] A threading hole 13 is formed through the top of the straight tube section 11, and a round hole is formed through the top of the inner straight tube 51. The threading hole 13 completely overlaps with the round hole, so that the electrical connection on the sensor can pass through the threading hole 13 to connect with external components.

[0031] An air outlet pipe 21 is integrally formed on the right side of the outer ring surface of the adsorption disk 2. The air outlet pipe 21 is connected to the bottom end of the inner part of the adsorption disk 2. A one-way valve 3 is threadedly installed on the air outlet pipe 21. The one-way valve 3 allows the gas in the inner cavity of the adsorption disk 2 to be discharged only outward, resulting in a large pressure difference between the inside and the outside, thereby improving the adsorption firmness.

[0032] A connecting pipe 22 is integrally formed on the left side of the outer ring surface of the adsorption disk 2. The connecting pipe 22 is connected to the bottom end of the inner part of the adsorption disk 2, and a sealing cover 4 is installed on the connecting pipe 22. The sealing cover 4 can be detached from the connecting pipe 22 as needed, thereby allowing external gas to enter the inner cavity of the adsorption disk 2, making it easy to remove.

[0033] A threaded rod 41 is provided at the lower end of the sealing gland 4, and a communication port 42 is formed by cutting away a portion of the outer surface of the threaded rod 41, and the bottom end of the communication port 42 is connected to the inner cavity of the adsorption disk 2. After the sealing gland 4 is deflected counterclockwise, the threaded rod 41 moves up, and the communication port 42 is exposed, thereby allowing the outside to communicate with the inner cavity of the adsorption disk 2;

[0034] The threaded rod 41 is threadedly connected to the connecting pipe 22, and a sealing gasket is pressed between the bottom end of the sealing cover 4 and the top end of the connecting pipe 22. The clockwise deflection of the sealing cover 4 can make the sealing gasket tightly pressed between the sealing cover 4 and the connecting pipe, thereby improving the sealing performance.

[0035] The implementation principle of a protective device for a pressure sensor in the embodiment of the present application is as follows: in actual use, first, the wires of the pressure sensor are passed through the rubber sleeve 5 and the round hole and threading hole 13 of the protective shell 1 in sequence, and then the pressure sensor can be connected to the connection port of the device through the threaded section of its connection end, and then the rubber sleeve 5 is plugged into the outside of the pressure sensor, and then the protective shell 1 is sleeved on the rubber sleeve 5, and then we continue to press the protective shell 1 toward the surface of the device, at this time, the contact rubber ring 7 on the inner wall of the protective shell 1 is tightly fitted with the widened section 52 of the rubber sleeve 5, so that the adsorption disk 2 at the bottom end of the protective shell 1 is tightly fitted with the outer surface of the device, and then the adsorption disk 2 is firmly fixed on the surface of the device, and the fixing thereof can be completed. Since the inner walls between the protective shell 1 and the rubber sleeve 5 are not in direct contact, the force transmitted to the internal sensor when the protective shell 1 is hit will also be reduced, thereby improving the protection effect, and the rubber sleeve 5 itself has a certain elasticity, which can also play a buffering effect on the pressure sensor, further improving the protection effect;

[0036] By sleeve-fitting the rubber sleeve 5 and the protective housing 1 on the outside of the pressure sensor, and making sure that the inner walls of the protective housing 1 and the rubber sleeve 5 are not in direct contact, the force transmitted to the internal sensor when the protective housing 1 is hit will be reduced, and the rubber sleeve 5 itself has a certain elasticity, which can improve the protective effect by playing a buffering role;

[0037] An adsorption disk 2 is arranged at the bottom end of the protective shell 1, and a one-way valve 3 is arranged on the adsorption disk 2, which allows the gas in the inner cavity of the adsorption disk 2 to be discharged only outward, so that the pressure difference between the inside and the outside is large, and the adsorption firmness is improved. The sealing pressure cover 4 can further allow external gas to enter the inner cavity of the adsorption disk 2, making it easy to remove.

[0038] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A protective device for a pressure sensor, comprising a protective housing (1), an adsorption plate (2), a rubber sleeve (5) and a contact rubber ring (6), characterized in that: The bottom end of the protective shell (1) is flexibly connected to a suction plate (2), the rubber sleeve (5) is arranged inside the protective shell (1), the inner ring surface of the protective shell (1) is glued with a contact rubber ring (6), the inner ring of the contact rubber ring (6) is tightly abutted against the outer ring surface of the rubber sleeve (5), and the inner top of the protective shell (1) is abutted against the outer top of the rubber sleeve (5).

2. A protective device for a pressure sensor as claimed in claim 1, characterized in that: The protective housing (1) comprises a straight pipe section (11) and a contact section (12), and the contact rubber ring (6) is arranged on the inner wall of the contact section (12); The rubber sleeve (5) comprises an inner straight tube (51) and a widened section (52); the outer diameter of the inner straight tube (51) is smaller than the inner diameter of the straight tube section (11), and the width of the widened section (52) is smaller than the length of the contact section (12).

3. A protective device for a pressure sensor as claimed in claim 2, characterized in that: A threading hole (13) is formed through the top of the straight tube section (11) and a circular hole is formed through the top of the inner straight tube (51). The threading hole (13) completely overlaps with the circular hole.

4. A protective device for a pressure sensor as claimed in claim 1, characterized in that: An air outlet pipe (21) is integrally formed on the right side of the outer ring surface of the adsorption disk (2), the air outlet pipe (21) is connected to the bottom end of the interior of the adsorption disk (2), and a one-way valve (3) is threadedly installed on the air outlet pipe (21).

5. A protective device for a pressure sensor as claimed in claim 1, characterized in that: A connecting pipe (22) is integrally formed on the left side of the outer ring surface of the adsorption disk (2), the connecting pipe (22) is connected to the bottom end of the interior of the adsorption disk (2), and a sealing gland (4) is installed on the connecting pipe (22).

6. A protective device for a pressure sensor as claimed in claim 5, characterized in that: A threaded rod (41) is provided at the lower end of the sealing gland (4), a portion of the outer ring surface of the threaded rod (41) is cut away to form a communication port (42), and the bottom end of the communication port (42) is communicated with the inner cavity of the adsorption disk (2); The threaded rod (41) is threadedly connected to the connecting pipe (22), and a sealing gasket is pressed between the bottom end of the sealing gland (4) and the top end of the connecting pipe (22).

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