Pipeline air pressure sensor

Abstract

The utility model relates to the technical field of air pressure monitoring, and discloses a pipeline air pressure sensor. The pipeline air pressure sensor comprises an air cylinder, a bolt is installed at the lower end of the air cylinder in a penetrating mode, a nut is installed at the lower end of the bolt in a penetrating mode, an electromagnetic valve is fixedly installed below the air cylinder, a connecting plate is fixedly installed at the top end of the air cylinder, and a connecting pipe is installed in the center of the connecting plate in a penetrating mode. A sealing ring is installed at the bottom end of the connecting pipe in a penetrating mode, flange structures are arranged at the front end and the rear end of the electromagnetic valve, the electromagnetic valve is fixedly installed at the lower end of the air cylinder through bolts and nuts, and the electromagnetic valve and the air cylinder can be directly connected with a pipeline through a three-way pipeline between the flange structures during installation. The pipeline is prevented from being trepanned before installation, and meanwhile, the air cylinder is not communicated with the pipeline through the electromagnetic valve during maintenance operation, so that the condition of gas leakage during subsequent maintenance operation is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of air pressure monitoring, in particular to a pipeline air pressure sensor. Background Technique

[0002] An air pressure sensor is an instrument used to measure the absolute pressure of a gas, mainly applicable to physical experiments related to gas pressure, such as gas laws, etc., and can also measure the pressure of dry and non-corrosive gases in biological and chemical experiments.

[0003] The existing Chinese utility model patent with the reference publication number of CN207335947U discloses an air pressure sensor, including: a housing, with one end being the detection end and the other end being the output end; a detection resistor, divided into a fixed resistor and a follower resistor, where the fixed resistor is fixedly arranged inside the housing, and the follower resistor is arranged inside the housing, in contact with and slidingly cooperating with the fixed resistor; a pressure-sensitive film, located at the detection end, hermetically connected to the inner wall of the housing and connected to the follower resistor; a circuit connector, located at the output end, fixedly arranged outside the housing and connected to the detection resistor through a wire; the detection end has an air pressure communication port. It is not easily damaged, has a wide range of applications, unnecessary equipment is externally connected through the circuit connector, effectively reducing the volume, so as to be applicable to relatively narrow measurement points. For sealed high-pressure pipelines, it can better control the size of the detection port set on the pipeline, reduce the opening size, avoid air leakage, or damage to the pipeline.

[0004] When the existing air pressure sensor monitors the air pressure inside the pipeline, it needs to be connected to the pipeline through a specific pipeline structure or by opening a hole on the surface of the monitored pipeline, which is very inconvenient during installation. At the same time, most of the internal structures of the existing air pressure sensors have movable parts, and the movement of the gas inside the pipeline will cause the pipe wall to vibrate, which may affect the detection accuracy of the sensor. Content of the Utility Model

[0005] (1) Technical Problems to be Solved

[0006] Aiming at the deficiencies of the prior art, the utility model provides a pipeline air pressure sensor, which has the advantages of being easy to install and avoiding the influence of vibration on the detection accuracy, and solves the above technical problems.

[0007] (2) Technical Solutions

[0008] To achieve the above object, the present utility model provides the following technical solutions: A pipeline air pressure sensor, comprising: a cylinder, a bolt is inserted and installed at the lower end of the cylinder, a nut is inserted and installed at the lower end of the bolt, a solenoid valve is fixedly installed below the cylinder, a connecting plate is fixedly installed at the top end of the cylinder, a connecting pipe is inserted and installed at the center of the connecting plate, a sealing ring is inserted and installed at the bottom end of the connecting pipe, a spring is inserted and installed on the outer side of the connecting pipe, a sliding ring is fixedly installed at the top end of the connecting pipe, a spiral wire is fixedly installed on the front side of the sliding ring, a limiting pipe is fixedly installed above the connecting plate, an ammeter is fixedly installed above the limiting pipe, a resistor is fixedly installed below the ammeter, and a controller is fixedly installed above the ammeter; The bolt and the nut can facilitate the connection between the cylinder and the solenoid valve.

[0009] As a preferred technical solution of the present utility model, the cylinder is of a tubular structure, and a flange is provided at the bottom end. The solenoid valve is fixedly connected to the cylinder through bolts and nuts; The cylinder can limit the position of the connecting pipe.

[0010] As a preferred technical solution of the present utility model, the center of the connecting plate is provided with an opening structure fitted with the connecting pipe. The connecting pipe and the connecting plate form a sliding connection, and the bottom end of the connecting pipe is of a closed structure. The sealing ring is made of rubber; The connecting plate can limit the positions of the connecting pipe and the top end of the spring.

[0011] As a preferred technical solution of the present utility model, the outer side of the sealing ring contacts the inner wall of the cylinder, and the sealing ring and the cylinder form a sliding connection. The central aperture of the sliding ring matches the outer diameter of the resistor; The sealing ring can achieve a sealing effect.

[0012] As a preferred technical solution of the present utility model, the bottom end of the connecting pipe is provided with an annular protrusion structure. The spring is located between the connecting plate and the connecting pipe. The top end of the limiting pipe is provided with an opening structure fitted with the resistor; The connecting pipe can drive the sliding ring to move.

[0013] As a preferred technical solution of the present utility model, the resistor is of a cylindrical structure. The resistor passes through the bottom end of the limiting pipe and is connected to the ammeter. The resistor does not contact the inner wall of the connecting pipe, and the outer diameter of the resistor is smaller than the inner diameter of the connecting pipe; The resistance of the resistor can reflect the position of the connecting pipe.

[0014] As a preferred technical solution of the present utility model, the outer side of the resistor contacts the inner wall of the sliding ring, and the resistor and the sliding ring form a sliding connection; The sliding ring can facilitate the passage of current through the resistor.

[0015] Compared with the prior art, the present utility model provides a pipeline air pressure sensor, which has the following beneficial effects:

[0016] 1. Through the setting of the solenoid valve in the present utility model, flange structures are provided at both the front and rear ends of the solenoid valve. The solenoid valve is fixedly installed at the lower end of the cylinder through bolts and nuts. During installation, the solenoid valve together with the cylinder can be directly connected to the pipeline through a tee pipe between the flange structures, avoiding the need for pipe opening operations before installation. At the same time, during maintenance operations, the cylinder can be disconnected from the pipeline through the solenoid valve, thereby avoiding gas leakage during subsequent maintenance operations.

[0017] 2. Through the setting of the spring in the present utility model, an annular protrusion structure is provided at the bottom end of the connecting pipe. The spring is located between the connecting plate and the connecting pipe. The top end of the spring is fixedly connected to the connecting plate. The resistor is in a cylindrical structure. The resistor passes through the bottom end of the limiting pipe and is connected to the ammeter. The resistor does not contact the inner wall of the connecting pipe, and the outer diameter of the resistor is smaller than the inner diameter of the connecting pipe. The outer side of the sealing ring contacts the inner wall of the cylinder, and a sliding connection is formed between the sealing ring and the cylinder. The central aperture of the slip ring matches the outer diameter of the resistor. During use, the air pressure inside the pipeline will push the connecting pipe to compress the spring. When the connecting pipe moves, it can adjust the relative position between the slip ring and the resistor, thereby adjusting the actual resistance value of the resistor. The ammeter can facilitate the detection of the current passing through the resistor. The controller can obtain the resistance value of the resistor based on the current intensity, thereby obtaining the positional relationship between the slip ring and the resistor, calculating the contraction amount of the spring, calculating the pressure received by the spring based on the spring stiffness coefficient, and calculating the air pressure inside the pipeline based on the inner cavity cross-sectional area of the cylinder. Since the connecting plate is fixedly connected to the cylinder, and the cylinder is fixedly connected to the pipeline through the solenoid valve, the generated vibration cannot affect the state of the spring, thereby avoiding the influence of vibration on the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0019] Figure 2 is a schematic diagram of the connection structure between the cylinder and the solenoid valve of the present utility model;

[0020] Figure 3 is a schematic diagram of the cross-sectional structure of the cylinder of the present utility model;

[0021] Figure 4 is a schematic diagram of the cross-sectional structure of the limiting pipe of the present utility model;

[0022] Among them: 1. Cylinder; 11. Bolt; 12. Nut; 13. Solenoid valve; 14. Connecting plate; 15. Connecting pipe; 16. Sealing ring; 17. Spring; 18. Slip ring; 19. Spiral wire; 110. Limiting pipe; 111. Ammeter; 112. Resistor; 113. Controller. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following further describes the embodiments of the present utility model in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0024] In the description of the present utility model, unless otherwise specified, "a plurality of" means two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] Please refer to Figure 1 - Figure 4 , in this embodiment, a pipeline air pressure sensor includes: a cylinder 1, a bolt 11 is inserted and installed at the lower end of the cylinder 1, a nut 12 is inserted and installed at the lower end of the bolt 11, a solenoid valve 13 is fixedly installed below the cylinder 1, a connecting plate 14 is fixedly installed at the top end of the cylinder 1, a connecting pipe 15 is inserted through the center of the connecting plate 14, a sealing ring 16 is inserted through the bottom end of the connecting pipe 15, a spring 17 is inserted through the outside of the connecting pipe 15, a sliding ring 18 is fixedly installed at the top end of the connecting pipe 15, a spiral wire 19 is fixedly installed on the front side of the sliding ring 18, a limiting pipe 110 is fixedly installed above the connecting plate 14, an ammeter 111 is fixedly installed above the limiting pipe 110, a resistor 112 is fixedly installed below the ammeter 111, and a controller 113 is fixedly installed above the ammeter 111.

[0027] The cylinder 1 is a tubular structure, and a flange is provided at the bottom end. The solenoid valve 13 is fixedly connected to the cylinder 1 through the bolt 11 and the nut 12.

[0028] The center of the connecting plate 14 is provided with an opening structure that fits the connecting pipe 15. The connecting pipe 15 is slidably connected to the connecting plate 14, and the bottom end of the connecting pipe 15 is a closed structure. The sealing ring 16 is made of rubber.

[0029] The outer side surface of the sealing ring 16 contacts the inner wall of the cylinder 1, and a sliding connection is formed between the sealing ring 16 and the cylinder 1. The central aperture diameter of the slip ring 18 matches the outer diameter of the resistor 112.

[0030] The bottom end of the connecting pipe 15 is provided with an annular protrusion structure. The spring 17 is located between the connecting plate 14 and the connecting pipe 15. The top end of the limiting pipe 110 is provided with an opening structure for fitting with the resistor 112.

[0031] The resistor 112 has a cylindrical structure. The resistor 112 passes through the bottom end of the limiting pipe 110 and is connected to the ammeter 111. The resistor 112 does not contact the inner wall of the connecting pipe 15, and the outer diameter of the resistor 112 is smaller than the inner diameter of the connecting pipe 15.

[0032] The outer side surface of the resistor 112 contacts the inner wall of the slip ring 18, and a sliding connection is formed between the resistor 112 and the slip ring 18.

[0033] Specifically, the cylinder 1 can limit the position of the connecting pipe 15. The bolt 11 and the nut 12 can facilitate the connection between the cylinder 1 and the solenoid valve 13. The solenoid valve 13 can adjust the connection state between the cylinder 1 and the pipeline. The connecting plate 14 can limit the positions of the connecting pipe 15 and the top end of the spring 17. The connecting pipe 15 can drive the slip ring 18 to move and compress the spring 17. The sealing ring 16 can achieve a sealing effect. The spring 17 can limit the movement of the connecting pipe 15. The slip ring 18 can facilitate the passage of current. The spiral wire 19 can facilitate the movement of the slip ring 18. The limiting pipe 110 can limit the position of the resistor 112. The ammeter 111 can facilitate the detection of the current passing through the resistor 112. The controller 113 can obtain the resistance value of the resistor 112 based on the current intensity, thereby obtaining the positional relationship between the slip ring 18 and the resistor 112, calculating the contraction amount of the spring 17, calculating the pressure received by the spring 17 based on the spring constant of the spring 17, and calculating the internal air pressure of the pipeline based on the inner cavity cross-sectional area of the cylinder 1.

[0034] In use, flange structures are provided at both the front and rear ends of the solenoid valve 13. The solenoid valve 13 is fixedly installed at the lower end of the cylinder 1 through bolts 11 and nuts 12. During installation, the solenoid valve 13 together with the cylinder 1 can be directly connected to the pipeline through a tee pipeline between the flange structures, avoiding the need for pipe opening operations on the pipeline before installation. At the same time, during maintenance operations, the cylinder 1 can be disconnected from the pipeline through the solenoid valve 13, thus avoiding gas leakage during subsequent maintenance operations. A circular protrusion structure is provided at the bottom end of the connecting pipe 15. The spring 17 is located between the connecting plate 14 and the connecting pipe 15. The top end of the spring 17 is fixedly connected to the connecting plate 14. The resistor 112 is in a cylindrical structure. The resistor 112 passes through the bottom end of the limiting pipe 110 and is connected to the ammeter 111. The resistor 112 does not contact the inner wall of the connecting pipe 15, and the outer diameter of the resistor 112 is smaller than the inner diameter of the connecting pipe 15. The outer side of the sealing ring 16 contacts the inner wall of the cylinder 1, and a sliding connection is formed between the sealing ring 16 and the cylinder 1. The central aperture of the slip ring 18 matches the outer diameter of the resistor 112. In use, the air pressure inside the pipeline will push the connecting pipe 15 to compress the spring 17. When the connecting pipe 15 moves, it can adjust the relative position between the slip ring 18 and the resistor 112, thereby adjusting the actual resistance value of the resistor 112. The ammeter 111 can facilitate the detection of the current passing through the resistor 112. The controller 113 can obtain the resistance value of the resistor 112 based on the current intensity, thereby obtaining the positional relationship between the slip ring 18 and the resistor 112, calculating the contraction amount of the spring 17, and calculating the pressure received by the spring 17 based on the spring constant of the spring 17, and calculating the air pressure inside the pipeline based on the inner cavity cross-sectional area of the cylinder 1. Since the connecting plate 14 is fixedly connected to the cylinder 1 and the cylinder 1 is fixedly connected to the pipeline through the solenoid valve 13, the generated vibration cannot affect the state of the spring 17, thus avoiding the influence of vibration on the detection results.

[0035] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pipeline air pressure sensor, characterized in that, Comprising: A cylinder (1), a bolt (11) is inserted and installed at the lower end of the cylinder (1), a nut (12) is inserted and installed at the lower end of the bolt (11), a solenoid valve (13) is fixedly installed below the cylinder (1), a connecting plate (14) is fixedly installed at the top end of the cylinder (1), a connecting pipe (15) is inserted through the center of the connecting plate (14), a sealing ring (16) is inserted and installed at the bottom end of the connecting pipe (15), a spring (17) is inserted through the outside of the connecting pipe (15), a sliding ring (18) is fixedly installed at the top end of the connecting pipe (15), a spiral wire (19) is fixedly installed on the front side of the sliding ring (18), a limiting pipe (110) is fixedly installed above the connecting plate (14), an ammeter (111) is fixedly installed above the limiting pipe (110), a resistor (112) is fixedly installed below the ammeter (111), and a controller (113) is fixedly installed above the ammeter (111).

2. A pipeline air pressure sensor according to claim 1, characterized in that: The cylinder (1) is of a tubular structure, with a flange provided at the bottom end, and the solenoid valve (13) is fixedly connected to the cylinder (1) through the bolt (11) and the nut (12).

3. A pipeline air pressure sensor according to claim 1, characterized in that: The center of the connecting plate (14) is provided with an opening structure that fits the connecting pipe (15), the connecting pipe (15) is slidably connected to the connecting plate (14), and the bottom end of the connecting pipe (15) is of a closed structure, and the sealing ring (16) is made of rubber.

4. A pipeline air pressure sensor according to claim 1, characterized in that: The outer side surface of the sealing ring (16) contacts the inner wall of the cylinder (1), and the sealing ring (16) is slidably connected to the cylinder (1), and the central aperture of the sliding ring (18) matches the outer diameter of the resistor (112).

5. A pipeline air pressure sensor according to claim 1, characterized in that: The bottom end of the connecting pipe (15) is provided with an annular convex structure, the spring (17) is located between the connecting plate (14) and the connecting pipe (15), and the top end of the limiting pipe (110) is provided with an opening structure that fits the resistor (112).

6. A pipeline air pressure sensor according to claim 1, characterized in that: The resistor (112) is of a cylindrical structure, the resistor (112) penetrates through the bottom end of the limiting pipe (110) and is connected to the ammeter (111), the resistor (112) does not contact the inner wall of the connecting pipe (15), and the outer diameter of the resistor (112) is smaller than the inner diameter of the connecting pipe (15).

7. A pipeline air pressure sensor according to claim 1, characterized in that: The outer side surface of the resistor (112) contacts the inner wall of the sliding ring (18), and the resistor (112) is slidably connected to the sliding ring (18).

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