Integrated pipeline medium pressure sensor
Through integrated design and acid-resistant steel materials, the existing pressure sensors are solved in the environment of high pressure and corrosive media, and the pressure detection effect is achieved with high precision, long life and widely applicable.
Patent Information
- Application Number
- CN202323573823.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-27
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2033-12-27
AI Technical Summary
Existing pressure sensors have problems such as low overload resistance, low safety hazards and corrosion resistance in high-pressure and corrosive media environments, which affect their service life and detection accuracy.
The integrated pipeline medium pressure sensor design is adopted, and an integrated structure is formed through the body, base and joint. The strain gauge is used to directly detect the pressure impact of the medium, eliminate welding steps and sealing rings, and use acid-resistant steel materials, suitable for acid, alkali, etc. Chemical medium.
It improves the detection accuracy and service life, expands the scope of application, reduces safety hazards, and realizes stable detection of high-pressure and corrosive media.
Smart Images
Figure CN222258568U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pressure sensors, in particular to an integrated pipeline medium pressure sensor. Background Art
[0002] Pressure sensor is a commonly used sensor in the process of industrial development. It is widely used in various pressure measurement detection environments, mainly in industrial fields such as petrochemical, electric power, oil wells, aerospace, military industry and automation control.
[0003] For non-shaped media such as liquid, gas, slurry, etc. flowing in pipelines, pressure sensors are needed to detect the pressure at a certain key node of the pipeline. The pressure sensors currently used usually have a split structure, specifically, the pressure sensing component and the base are separated, and the two are of two types: welded type and side sealed type. The essence of the welding type is to weld the pressure sensing component and the base in the sensor by argon arc welding. However, when a water hammer effect occurs inside the pipeline, a large impact pressure will be generated. When the pressure exceeds the product's limit overload pressure, the welding parts of the product are most likely to be damaged. In addition, due to manual welding, various uncontrollable factors in welding will directly affect the welding quality, resulting in safety hazards for the sensor under such high-pressure conditions. The traditional side sealing type is currently used, in which the core pressure sensing part and the base use a rubber O-ring, which relies on the extrusion and deformation of the O-ring for sealing. This method can only cope with pipelines with lower pressure. Some side sealing methods can reach 60MPA or even 100MPA. Under long-term alternating pressure, the O-ring will wear and leak. Moreover, when the medium in the pipeline is acidic or alkaline, it will corrode the O-ring, limiting the scope of use of the sensor.
[0004] The above sensors have problems such as low overload resistance, potential safety hazards and low corrosion resistance, which in turn affect the service life and detection accuracy of the sensors. Utility Model Content
[0005] In order to solve the above technical problems, the utility model provides an integrated pipeline medium pressure sensor, which detects the pressure of the fluid medium in the pipeline through the integrated structure of the body, the base and the joint.
[0006] In order to achieve the above object, the utility model is implemented through the following technical solutions:
[0007] An integrated pipeline medium pressure sensor, comprising:
[0008] The main body is installed on the pipeline, with one end of the side wall being screwed to the pipeline and the other end of the side wall extending into the pressure gauge to generate strain through the medium flowing into the inside.
[0009] The base is sleeved on the main body, located in the middle of the main body, and connected to the main body as a whole. Its side wall contacts the wrench and is used to install the main body during the rotation of the wrench.
[0010] The joint is sleeved on the main body, and its two sides are respectively connected with the main body and the base as a whole, and its side wall is screwed with the pressure gauge.
[0011] Compared with the prior art, the utility model has the following advantages:
[0012] After the flowing medium in the pipeline enters the main body, it generates an impact force on the top surface inside the main body. After the top of the main body feels the impact, it generates strain and transmits the strain signal to the pressure gauge to directly detect the pressure of the medium. The main body, base and joint form an integrated structure, eliminating the welding step. The entire base, main body and joint are integrated as a whole, which is simple, compact and easy to install on the pipeline. The structure only needs one-time processing, and the stress generated at the connection part of the pipeline exists at one end of the main body, which has no effect on the pressure of the medium detected at the other end of the main body, thereby improving the detection accuracy. Moreover, the integrated structure does not require a sealing ring for sealing, and there is no need to consider the sealing problem. It is directly used for the detection of the pressure of chemically corrosive fluid media such as acids, alkalis and salts. It has a wide range of applications and a long service life.
[0013] Further preferably, a blind hole is opened inside the body, the top surface of the blind hole is adjacent to the top surface of the other end of the body, and the opening is located at one end of the body for the medium to flow into the pipeline.
[0014] By adopting the above technical solution, after the medium enters the blind hole, a pressure shock is directly generated on the top surface of the blind hole. The strain gauge on the top surface of the main body generates strain after sensing the pressure, and directly transmits the cover strain to the pressure gauge, thereby achieving the purpose of detecting pressure through the combination of the blind hole and the main body.
[0015] More preferably, the connection between the top surface and the side wall of the blind hole is rounded.
[0016] By adopting the above technical solution, the medium along the inner wall of the blind hole can flow into the top surface more smoothly and stably, ensuring that the strain error generated by the strain gauge in real time is small, thereby improving the detection accuracy.
[0017] Further preferably, a strain gauge is provided on the top surface of the other end of the body, the strain gauge is bonded to the body, and the strain gauge is connected to the pressure gauge via a signal line for transmitting the strain on the body to the pressure gauge via the signal line.
[0018] By adopting the above technical solution, the pressure shock of the medium in the blind hole is sensed by the strain gauge, strain is generated under the pressure shock, and the strain signal representing the pressure is transmitted to the pressure gauge to complete the pressure detection. The detection process is simple, stable, highly sensitive, small in error, and highly reliable.
[0019] Further optimization is that the inner diameter of the blind hole is larger than the diameter of the strain gauge on the body.
[0020] By adopting the above technical solution, any unit area on the strain gauge can feel the impact force of the medium and generate strain, thereby improving the detection accuracy.
[0021] Further optimization is that the materials of the body, base and joints are all made of acid-resistant steel.
[0022] By adopting the above technical scheme, the sensor made of this steel has good corrosion resistance. It is not only suitable for general fluids, gases, and slurries, but also suitable for acid and alkali corrosive media of chemical media. It has high oxidation resistance and corrosion resistance, good corrosion resistance, and a very wide range of applications; it has suitable mechanical properties and can be connected to the pressure gauge and pipeline respectively by threaded connection, directly improving the detection accuracy; it also has good cold and hot processing properties and is easy to be formed and processed in one step. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a structural schematic diagram of this embodiment.
[0024] Figure 2 It is a schematic diagram of the structure of the connection between the body and the base in this embodiment.
[0025] Figure 3 It is a schematic diagram of the cross-sectional structure of this embodiment.
[0026] Figure 4 Schematic diagram of the connection between this embodiment and the pressure gauge.
[0027] Figure numerals: 1-body; 11-blind hole; 2-connector; 3-thread; 4-strain gauge; 5-base; 6-pressure gauge. DETAILED DESCRIPTION
[0028] In response to the above technical problems, the applicant has made the following designs and ideas: simplify the structure and design the above structure into an integrated one to reduce the factors affecting the accuracy; change the principle of detecting pressure, introduce the medium into the sensor, and generate a pressure shock at a position near the strain gauge inside the sensor to avoid the influence of other stresses or interference factors on the detection accuracy, and transfer the stress generated during the installation process to the part connected to the pipeline or pressure gauge to eliminate the influence on the strain process of the strain gauge.
[0029] The following is combined with Figure 1 The utility model is further introduced in detail.
[0030] An integrated pipeline medium pressure sensor, such as Figure 1 As shown, including:
[0031] The body 1 is installed on the pipeline, with one end of the side wall being screwed to the pipeline and the other end of the side wall extending into the pressure gauge 6, and is used to generate strain through the medium flowing into the inside. The top surface of the body 1 is a strain area, which is used to attach the strain gauge 4.
[0032] The base 5 is sleeved on the body 1, located in the middle of the body 1, and connected to the body 1 as a whole. Its side wall contacts the wrench and is used to install the body 1 during the rotation of the wrench.
[0033] The connector 2 is sleeved on the main body 1 , and its two sides are respectively connected to the main body 1 and the base 5 as a whole, and its side wall is screwed to the pressure gauge 6 .
[0034] The body 1, the base 5 and the joint 2 are all made of metal, which has good corrosion resistance and is suitable for detecting the pressure of chemically corrosive fluid media such as acids, alkalis and salts.
[0035] After the flowing medium in the pipeline enters the main body 1, it generates an impact force on the top surface inside the main body 1. After the top of the main body 1 senses the impact, it generates strain and transmits the strain signal to the pressure gauge 6 to directly detect the pressure of the medium. The main body 1, the base 5 and the joint 2 form an integrated structure, eliminating the welding step. The entire base, the main body and the joint are integrated and processed at one time. It is simple, compact and easy to install on the pipeline. The structure only needs to be processed once, and the stress generated at the connection part of the pipeline exists at one end of the main body 1, which has no effect on the pressure of the medium detected at the other end of the main body 1, thereby improving the detection accuracy. Moreover, the integrated structure does not require a sealing ring for sealing, and there is no need to consider the sealing problem. It is directly used for the detection of the pressure of chemically corrosive fluid media such as acids, alkalis and salts. It has a wide range of applications and a long service life.
[0036] Specifically, Figure 1 , Figure 2 as well as Figure 3 As shown, in this embodiment, a blind hole 11 is opened inside the body 1, and the top surface of the blind hole 11 is adjacent to the top surface of the other end of the body 1. The opening is located at one end of the body 1, and is used for the medium to flow into the pipeline. After the medium enters the blind hole 11, a pressure impact is directly generated on the top surface of the blind hole 11. The strain gauge 4 on the top surface of the body 1 generates strain after sensing the pressure, and the cover strain is directly transmitted to the pressure gauge 6. The purpose of detecting pressure is achieved through the combination of the blind hole 11 and the body 1.
[0037] Specifically, Figure 3 As shown, in this embodiment, the connection between the top surface and the side wall of the blind hole 11 is chamfered, so that the medium along the inner wall of the blind hole 11 flows into the top surface more smoothly and stably, ensuring that the strain error generated by the strain gauge 4 in real time is small, thereby improving the detection accuracy.
[0038] Specifically, Figure 1 , Figure 2as well as Figure 4 As shown, in this embodiment, a strain gauge 4 is provided on the top surface of the other end of the main body 1, the strain gauge 4 is bonded to the main body 1, and the strain gauge 4 is connected to the pressure gauge 6 through a signal line, which is used to transmit the strain on the main body 1 to the pressure gauge 6 through the signal line, and the pressure impact of the medium in the blind hole 11 is felt by the strain gauge 4, strain is generated under the pressure impact, and the strain signal representing the pressure is transmitted to the pressure gauge 6 to complete the pressure detection. The detection process is simple, stable, highly sensitive, small in error, and highly reliable.
[0039] Specifically, Figure 3 As shown, in this embodiment, the inner diameter of the blind hole 11 is larger than the diameter of the strain gauge 4 on the body 1, and any unit area on the strain gauge 4 can feel the impact force of the medium and generate strain, thereby improving the detection accuracy.
[0040] Specifically, Figure 1 As shown, in this embodiment, the body 1, the base 5, and the joint 2 are all made of acid-resistant steel. The sensor made of this steel has good corrosion resistance. It is not only suitable for general fluids, gases, and slurries, but also suitable for acid and alkali corrosive media of chemical media. It has high oxidation resistance and corrosion resistance, good corrosion resistance, and a very wide range of applications; it has suitable mechanical properties and can be connected to the pressure gauge 6 and the pipeline respectively by means of thread 3 connection, which directly improves the detection accuracy; it also has good cold and hot processing properties and is easy to be formed and processed in one step.
[0041] Please combine Figure 1-Figure 4 The installation process and working principle of this embodiment are described as follows:
[0042] Installation Process
[0043] The strain gauge 4 is attached to the top surface of the body 1, and then the upper part of the body 1 is extended into the pressure gauge 6, the strain gauge 4 is in the pressure gauge 6, and the base 5 is clamped with a wrench and rotated to screw the joint 2 with the pressure gauge 6. Then the lower part of the body 1 is extended into the pipeline, and the base 5 is rotated by turning the wrench so that the lower part of the body 1 is installed in the pipeline and connected together through the thread 3. It should be noted that the pipeline here is a well-known prior art and will not be described in detail.
[0044] How it works
[0045] The medium flowing through the pipeline enters from the blind hole 11 and generates impact after contacting the top surface of the blind hole 11. The pressure of the medium acts on the top surface of the blind hole 11, and the strain gauge 4 directly generates strain and outputs a strain signal to the pressure gauge 6, thereby completing the detection process.
[0046] In summary, the structure of this embodiment is simple and compact, easy to process, the detection process is not affected by any other factors, and it has the characteristics of high detection accuracy. After multiple actual tests, it was found that its detection accuracy reached more than one ten-thousandth, and it is widely applicable to the detection of pressure of any fluid medium.
[0047] This specific embodiment is merely an explanation of the utility model, and it is not a limitation of the utility model. After reading this specification, those skilled in the art can make non-creative modifications to the embodiment as needed, but as long as it is within the protection scope of the utility model, it is protected by the patent law.
Claims
1. An integrated pipeline medium pressure sensor, characterized in that: include: The body (1) is installed on the pipeline, with one end of the side wall being screwed to the pipeline and the other end of the side wall extending into the pressure gauge (6) for generating strain through the medium flowing into the inside; A base (5) is sleeved on the body (1), is located in the middle of the body (1), is integrally connected to the body (1), has a side wall in contact with the wrench, and is used to install the body (1) during the rotation of the wrench; The connector (2) is sleeved on the body (1), and its two sides are respectively connected to the body (1) and the base (5) as a whole, and its side wall is screwed to the pressure gauge (6).
2. The integrated pipeline medium pressure sensor according to claim 1, characterized in that: A blind hole (11) is provided inside the body (1), the top surface of the blind hole (11) is adjacent to the top surface of the other end of the body (1), and the opening is located at one end of the body (1) for the medium to flow into the pipeline.
3. The integrated pipeline medium pressure sensor according to claim 2, characterized in that: The connection between the top surface and the side wall of the blind hole (11) is rounded.
4. The integrated pipeline medium pressure sensor according to claim 2, characterized in that: A strain gauge (4) is provided on the top surface of the other end of the body (1); the strain gauge (4) is bonded to the body (1); the strain gauge (4) is connected to the pressure gauge (6) via a signal line, and is used to transmit the strain on the body (1) to the pressure gauge (6) via the signal line.
5. The integrated pipeline medium pressure sensor according to claim 2, characterized in that: The inner diameter of the blind hole (11) is greater than the diameter of the strain gauge (4) on the body (1).
6. The integrated pipeline medium pressure sensor according to claim 1, characterized in that: The body (1), the base (5) and the joint (2) are all made of acid-resistant steel.