Anti-thawing pressure sensor

Abstract

The utility model relates to an anti-unfreezing pressure sensor, which belongs to the technical field of sensors and comprises a pressure sensor hexagonal shell, a pressure sensing mechanism is arranged on the pressure sensor hexagonal shell, and an anti-unfreezing assembly is arranged on the pressure sensor hexagonal shell. When the anti-unfreezing pressure sensor is used, the pressure sensing mechanism is arranged to be in sealed connection with a pipeline under the mutual cooperation of all structures on the hexagonal shell of the pressure sensor, and when the anti-unfreezing pressure sensor is used, the heating plate is arranged to avoid sensor damage caused by liquid solidification due to temperature drop; under the cooperation of the auxiliary assembly, the pressure caused by unfreezing is effectively buffered, and the situation that the sensor is damaged due to the fact that overlarge pressure makes direct contact with a sensing element in the sensor is avoided, so that the pressure sensor can achieve stable and accurate pressure measurement in a low-temperature environment; the problem that the pressure sensor is prone to being pressed and broken in the unfreezing environment is solved, and therefore the service life of the pressure sensor can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to an anti-thawing pressure sensor. 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 usually composed of a pressure sensitive element and a signal processing unit. Pressure sensor is the most commonly used sensor in industrial practice and is widely used in various industrial automatic control environments, involving water conservancy and hydropower, railway transportation, intelligent buildings, production automatic control, aerospace, military industry, petrochemical, oil wells, electric power, ships, machine tools, pipelines and many other industries.

[0003] Pressure sensors are widely used, not only to measure the pressure of gaseous media, but also to measure the pressure of liquids. When measuring liquid pressure, the measuring medium will freeze when the temperature drops below the freezing point. After thawing, the volume of the measuring medium expands. In this case, the risk of the sensitive elements of the pressure sensor being crushed is extremely high. For example, the pressure measurement data in the waterway will not be accurate enough, which will affect the normal use of the pressure sensor and shorten its service life. Therefore, an anti-thawing pressure sensor is proposed to solve the above technical problems. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides an anti-thawing pressure sensor, which has the advantages of good protection effect and extended service life. It solves the problem that when measuring liquid pressure, the measuring medium will freeze when the temperature drops below the freezing point, and the volume of the measuring medium will expand after thawing. In this case, the risk of the sensitive element of the pressure sensor being crushed is extremely high. For example, the pressure measurement data in the waterway will not be accurate enough, which affects the normal use of the pressure sensor and also shortens its service life.

[0005] To achieve the above object, the utility model provides the following technical solutions: an anti-thaw pressure sensor, comprising a hexagonal shell of a pressure sensor, a pressure sensing mechanism is arranged on the hexagonal shell of the pressure sensor, and an anti-thaw component is arranged on the hexagonal shell of the pressure sensor;

[0006] The pressure sensing mechanism includes a connector fixedly mounted on the top of the hexagonal shell of the pressure sensor, a first O-ring fixedly mounted on the outside of the hexagonal shell of the pressure sensor, a second O-ring fixedly mounted inside the hexagonal shell of the pressure sensor, and a ceramic processing module located on the top of the second O-ring is arranged inside the hexagonal shell of the pressure sensor;

[0007] A heating plate is fixedly installed inside the hexagonal shell of the pressure sensor, a first supporting plate fixedly installed inside the hexagonal shell of the pressure sensor is arranged on the left side of the heating plate, and a second supporting plate fixedly installed inside the hexagonal shell of the pressure sensor is arranged on the right side of the heating plate.

[0008] Furthermore, the anti-thaw component includes two buffer seats fixedly installed inside the hexagonal shell of the pressure sensor, and the two buffer seats are slidably connected to the inside of each of the two buffer seats. A spring fixedly connected to the inner wall of the buffer seat is fixedly installed on the top of the movable block, and a connecting rod extending to the bottom of the buffer seat is fixedly installed on the bottom of the movable block. A rubber ring is fixedly installed on the bottom of the connecting rod, and a piston is fixedly connected to the bottom of the rubber ring.

[0009] Furthermore, the ceramic processing module is composed of a ceramic body, a processing circuit, and a wire, and the processing circuit is located inside the ceramic body, and the wire extends to the bottom of the ceramic body.

[0010] Furthermore, the first O-ring is made of rubber, and the first O-ring is sleeved on the outside of the hexagonal shell of the pressure sensor.

[0011] Furthermore, a sliding groove is provided on the inner wall of the buffer seat, and the movable block is slidably connected to the inner wall of the buffer seat through the sliding groove.

[0012] Furthermore, a first sealing hole is opened at the bottom of the buffer seat, and the connecting rod extends through the first sealing hole to the bottom of the buffer seat and is fixedly connected to the rubber ring.

[0013] Furthermore, the rubber ring and the piston are both provided with through holes, and the size of the through holes is larger than the size of the heating plate.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0015] The anti-thawing pressure sensor can be sealed and connected to a pipeline through the cooperation of various structures on the hexagonal shell of the pressure sensor through the pressure sensing mechanism when in use, and can avoid sensor damage caused by liquid solidification due to temperature drop through the setting of a heating plate when in use. In addition, with the cooperation of auxiliary components, the pressure caused by thawing is effectively buffered to avoid excessive pressure directly contacting the sensing element inside the sensor and damaging the sensor, so that the pressure sensor can achieve stable and accurate pressure measurement in a low-temperature environment, solves the problem that the pressure sensor is easily crushed by pressure in a thawing environment, and helps to increase the service life of the pressure sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic cross-sectional view of the structure of the utility model;

[0017] Figure 2 This is an enlarged schematic diagram of the structure of the ceramic and processing circuit module of the utility model;

[0018] Figure 3 For this utility model Figure 1 A schematic diagram of the enlarged structure in the middle;

[0019] Figure 4 It is a three-dimensional schematic diagram of the structure of the utility model.

[0020] In the figure: 1. hexagonal shell of pressure sensor; 201. first support plate; 202. second support plate; 3. heating plate; 4. first O-ring; 5. second O-ring; 6. ceramic processing module; 601. ceramic body; 602. processing circuit; 603. wire; 7. connector; 8. buffer seat; 9. movable block; 10. spring; 11. connecting rod; 12. rubber ring; 13. piston. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-4 An anti-thawing pressure sensor in this embodiment includes a hexagonal shell 1 of the pressure sensor, a pressure sensing mechanism is arranged on the hexagonal shell 1 of the pressure sensor, and an anti-thawing component is arranged on the hexagonal shell 1 of the pressure sensor.

[0023] Embodiment 1: The pressure sensing mechanism includes a connector 7 fixedly installed on the top of the hexagonal shell 1 of the pressure sensor. A first O-ring 4 is fixedly installed on the outside of the hexagonal shell 1 of the pressure sensor. The first O-ring 4 is made of rubber. The first O-ring 4 is sleeved on the outside of the hexagonal shell 1 of the pressure sensor, so as to improve the sealing performance of the hexagonal shell 1 of the pressure sensor when it is connected to the pipeline through the first O-ring 4.

[0024] Among them, a second O-ring 5 is fixedly installed inside the hexagonal shell 1 of the pressure sensor, and a ceramic processing module 6 located on the top of the second O-ring 5 is arranged inside the hexagonal shell 1 of the pressure sensor. The ceramic processing module 6 consists of a ceramic body 601, a processing circuit 602, and a wire 603. The processing circuit 602 is located inside the ceramic body 601, and the wire 603 extends to the bottom of the ceramic body 601. The wire 603 passes through the ceramic body 601, and the overall structure is easy to arrange.

[0025] Among them, a heating plate 3 is fixedly installed inside the hexagonal shell 1 of the pressure sensor. By supplying power to the heating plate 3, the solidification order of the liquid inside the sensor cavity is changed, the stress on the sensitive element caused by the solidification volume expansion of the measuring medium is eliminated, and the sensitive element is protected from damage. A first support plate 201 fixedly installed inside the hexagonal shell 1 of the pressure sensor is arranged on the left side of the heating plate 3, and a second support plate 202 fixedly installed inside the hexagonal shell 1 of the pressure sensor is arranged on the right side of the heating plate 3.

[0026] It should be added that the heating plate 3 is fixed between the first support plate 201 and the second support plate 202, and transferred into the hexagonal shell 1 of the pressure sensor together. The second O-ring 5 is installed in the hexagonal shell 1 of the pressure sensor. The ceramic processing module 6 and the connector 7 are welded in advance and then installed into the hexagonal shell 1 of the pressure sensor together and pressed on the second O-ring 5. The wire 603 passes through the ceramic body 601 and is connected to the processing circuit 602. The other end of the wire 603 is pressed onto the heating plate 3 by elastic force, and the heating plate 3 is connected to the circuit for control during use.

[0027] Embodiment 2: The anti-thaw component includes two buffer seats 8 fixedly installed inside the hexagonal shell 1 of the pressure sensor, and the two buffer seats 8 are both slidably connected with movable blocks 9. A sliding groove is opened on the inner wall of the buffer seat 8, and the movable block 9 is slidably connected to the inner wall of the buffer seat 8 through the sliding groove, so that the movement of the movable block 9 can be limited by the sliding groove, so that the movable block 9 can move smoothly inside the buffer seat 8.

[0028] Among them, a spring 10 fixedly connected to the inner wall of the buffer seat 8 is fixedly installed on the top of the movable block 9, a connecting rod 11 extending to the bottom of the buffer seat 8 is fixedly installed on the bottom of the movable block 9, a rubber ring 12 is fixedly installed on the bottom of the connecting rod 11, and a first sealing hole is opened at the bottom of the buffer seat 8. The connecting rod 11 extends to the bottom of the buffer seat 8 through the first sealing hole and is fixedly connected to the rubber ring 12, so that the rubber ring 12 can be used to support the inside of the hexagonal shell 1 of the pressure sensor, and the position of the rubber ring 12 can be adjusted by the connecting rod 11 when the rubber ring 12 is under pressure.

[0029] Among them, the bottom of the rubber ring 12 is fixedly connected to the piston 13, and through holes are opened inside the rubber ring 12 and the piston 13, and the size of the through hole is larger than the size of the heating plate 3, so that the liquid inside the hexagonal shell 1 of the pressure sensor can flow normally through the through hole, and the piston 13 can form a buffer when subjected to a sudden increase in pressure to avoid damage to the ceramic processing module 6.

[0030] It should be noted that the anti-thaw pressure sensor can be sealed and connected to the pipeline through the pressure sensing mechanism set up during use, with the cooperation of various structures on the hexagonal shell 1 of the pressure sensor. The heating plate 3 can be set up during use to avoid sensor damage caused by liquid solidification due to temperature drop. With the cooperation of auxiliary components, the pressure caused by thawing can be effectively buffered to avoid excessive pressure directly contacting the sensing elements inside the sensor and damaging the sensor. The pressure sensor can thus achieve stable and accurate pressure measurement in a low-temperature environment, solving the problem that the pressure sensor is easily crushed by pressure in a thawing environment, thereby helping to improve the service life of the pressure sensor.

[0031] The working principle of the above embodiment is:

[0032] When the anti-thaw pressure sensor is in use, the hexagonal shell 1 of the pressure sensor is first connected to the pipeline using its outer thread, and the sealing of the connection is improved by the first O-ring 4. When the pressure is monitored, the internal liquid flows normally through the piston 13 and the through hole inside the rubber ring 12 to contact the ceramic processing module 6, so that the operation data of the internal structure of the ceramic processing module 6 is transmitted, and the wire 603 supplies power to the heating plate 3 to heat the internal liquid to avoid the low temperature from affecting the monitoring. When measuring the liquid pressure, the measuring medium will freeze when the temperature drops below the freezing point. After thawing, the measuring medium will expand in volume, and the pressure will be transmitted to the connecting rod 11 through the piston 13 and the rubber ring 12, and the spring 10 inside the buffer seat 8 will be used to protect it, thereby avoiding damage to the sensitive components.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A thaw-resistant pressure sensor, comprising a pressure sensor hexagonal shell (1), characterized in that: The pressure sensor hexagonal shell (1) is provided with a pressure sensing mechanism, and the pressure sensor hexagonal shell (1) is provided with an anti-thawing component; The pressure sensing mechanism comprises a connector (7) fixedly mounted on the top of a hexagonal shell (1) of a pressure sensor, a first O-ring (4) fixedly mounted on the outside of the hexagonal shell (1) of the pressure sensor, a second O-ring (5) fixedly mounted inside the hexagonal shell (1) of the pressure sensor, and a ceramic processing module (6) located on the top of the second O-ring (5) is arranged inside the hexagonal shell (1) of the pressure sensor; A heating plate (3) is fixedly installed inside the hexagonal shell (1) of the pressure sensor, a first support plate (201) fixedly installed inside the hexagonal shell (1) of the pressure sensor is arranged on the left side of the heating plate (3), and a second support plate (202) fixedly installed inside the hexagonal shell (1) of the pressure sensor is arranged on the right side of the heating plate (3).

2. The anti-thawing pressure sensor according to claim 1, characterized in that: The anti-thawing component comprises two buffer seats (8) fixedly mounted inside the hexagonal shell (1) of the pressure sensor, wherein the inside of the two buffer seats (8) are both slidably connected with movable blocks (9), the top of the movable block (9) is fixedly mounted with a spring (10) fixedly connected to the inner wall of the buffer seat (8), the bottom of the movable block (9) is fixedly mounted with a connecting rod (11) extending to the bottom of the buffer seat (8), the bottom of the connecting rod (11) is fixedly mounted with a rubber ring (12), and the bottom of the rubber ring (12) is fixedly connected with a piston (13).

3. The anti-thawing pressure sensor according to claim 1, characterized in that: The ceramic processing module (6) is composed of a ceramic body (601), a processing circuit (602), and a wire (603), wherein the processing circuit (602) is located inside the ceramic body (601), and the wire (603) extends to the bottom of the ceramic body (601).

4. The anti-thawing pressure sensor according to claim 1, characterized in that: The first O-ring (4) is made of rubber and is sleeved on the outside of the hexagonal shell (1) of the pressure sensor.

5. The anti-thawing pressure sensor according to claim 2, characterized in that: A sliding groove is provided on the inner wall of the buffer seat (8), and the movable block (9) is slidably connected to the inner wall of the buffer seat (8) via the sliding groove.

6. The anti-thawing pressure sensor according to claim 2, characterized in that: A first sealing hole is provided at the bottom of the buffer seat (8), and the connecting rod (11) extends through the first sealing hole to the bottom of the buffer seat (8) and is fixedly connected to the rubber ring (12).

7. The anti-thawing pressure sensor according to claim 2, characterized in that: The rubber ring (12) and the piston (13) are both provided with through holes inside, and the size of the through holes is larger than the size of the heating plate (3).

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