A new pressure sensor

Abstract

The utility model provides a novel pressure sensor belongs to pressure sensor equipment technical field, including pressure sensor body still has detection transmitting circuit, receiving circuit, the import pipe of pressure sensor body and pressure sensor body are split type structure, the lower end of the casing of pressure sensor body has the interface of internal thread, the outside of import pipe has external thread, the upper end of import pipe and the lower end of casing interface are connected through the thread, the lower end of import pipe and pipeline internal thread bore are connected through the thread, detection transmitting circuit is installed in the element box of pressure sensor body, and receiving circuit is installed in the shell, the import pipe of this novel pressure sensor body and pressure sensor body are in split type structure, can replace when import pipe thread damage etc, bring the convenience to the user, save the expense expenditure accordingly, in the application, when the pressure in the pipeline is too low, can emit wireless signal, can prompt relevant staff to find out the reason in time and maintain, ensure that pressure sensor body and relevant equipment can work normally.

Description

Technical Field

[0001] This utility model belongs to the technical field of pressure sensor equipment, and in particular, it relates to a novel pressure sensor. Background Technology

[0002] Pressure sensors used for pipeline pressure detection are devices that convert physical pressure signals into measurable electrical signals. They are widely used in industries such as industry, automobiles, and medicine. The core principles include the piezoresistive effect and the piezoelectric effect. In specific applications, pressure sensors sense changes in the pressure of gas or liquid through sensitive elements (such as pressure resistors) and convert them into electrical signals for output (the output signals include, for example, 0-10V voltage signals or 4-20mA current signals, and the output signals are fed into relevant control equipment, etc.).

[0003] With the advancement of industrial technology, the functions of pressure sensors have also developed. For example, the authorized patent in my country, patent number "202122056406.X" and titled "A Pipeline Pressure Sensor," states that "compared to the prior art, this utility model provides a rubber part b on the connecting pipe of the pressure sensor and a rubber part a at the connection port on the pipeline. The locking and fixing between rubber parts a and b achieves a seal, preventing oil leakage. Simultaneously, the addition of a sealing cover filled with a sealing medium further enhances the sealing effect." As can be seen, although the comparative patent achieves its stated purpose, it suffers from structural and functional limitations, similar to other pipeline pressure sensors in the field, and has the following technical drawbacks. Firstly, it only has the function of detecting and outputting pipeline pressure signals. When there is a leak in the pipeline or the medium stops flowing in, it cannot alert relevant personnel, which can adversely affect the normal operation of equipment controlled by the pressure sensor's output signal (for example, if the pipeline provides cooling water to relevant equipment, and the water supply is interrupted, the personnel may be temporarily unaware, leading to excessive temperature rise and equipment malfunction). Secondly, the pressure sensor and the pipeline are connected by threads. If the threads are damaged due to the quality of the inlet pipe itself, the corrosion of the medium, or repeated removal and installation from the pipeline, the pressure sensor will become unusable because the inlet pipe and the pressure sensor housing are an integral structure that cannot be replaced. This will cause unnecessary trouble and expenses for the user. Utility Model Content

[0004] To overcome the shortcomings of existing pipeline pressure sensors due to structural limitations, as described in the background section, this invention provides a novel pressure sensor based on a pipeline pressure sensor body that can be replaced when the inlet pipe thread is damaged, bringing convenience to users and saving corresponding expenses. In application, it can monitor the pressure inside the pipeline in real time, and when the pressure inside the pipeline is too low, it can prompt relevant personnel to promptly identify the cause and perform maintenance, thus ensuring the normal operation of the pressure sensor body and related equipment as much as possible.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A novel pressure sensor includes a pressure sensor body, a detection transmitting circuit, and a receiving circuit. The inlet tube and the pressure sensor body are separate structures. The lower end of the housing of the pressure sensor body has an internally threaded interface, and the outer side of the inlet tube has an external thread. The upper end of the inlet tube and the lower end of the housing are connected by threads, and the lower end of the inlet tube and the internal threaded opening of the pipe are connected by threads. The detection transmitting circuit is installed in the component box of the pressure sensor body, and the receiving circuit is installed in the outer shell. The signal input terminal of the detection transmitting circuit and the two ends of the pressure resistor of the pressure sensor body are connected by wires.

[0007] Furthermore, the outer diameter of the upper end of the inlet pipe is smaller than the outer diameter of the lower end.

[0008] Furthermore, the imported pipe is made of rust-proof material.

[0009] Furthermore, a sealing ring is installed between the inlet pipe and the lower end interface of the housing.

[0010] Compared with existing technologies, the advantages of this utility model are as follows: Based on a pipeline pressure sensor body, the inlet pipe and the pressure sensor body are in a separate structure, allowing for replacement when the inlet pipe thread is damaged, thus providing convenience and saving costs for users. In application, the detection and transmitting circuit, in conjunction with the pressure resistor, can detect the pressure inside the pipeline in real time. When the pressure inside the pipeline is too low, it can transmit a wireless signal, which the receiving circuit receives and prompts relevant personnel to promptly investigate the cause and perform maintenance, ensuring the normal operation of the pressure sensor body and related equipment as much as possible. In summary, this utility model has good application prospects. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 This is a schematic diagram of the structure of the imported tube and the pressure sensor body of this utility model in a separate state.

[0013] Figure 2This is a schematic diagram of the structure of the imported tube and the pressure sensor body of this utility model in the combined state.

[0014] Figure 3 Figure 4 is the circuit diagram of this utility model. Detailed Implementation

[0015] Figure 1 , 2 As shown in Figures 3 and 4, a novel pressure sensor includes a pressure sensor body 1 for pipeline pressure detection and a power supply mechanism E1. The sensitive element of the pressure sensor body is a pressure resistor RT. The pressure sensing surface of the pressure resistor RT is located at the lower middle part of the housing of the pressure sensor body 1. One end of the pressure resistor RT is connected to the negative power output terminal 4 of the power supply mechanism E1 via a wire. It also has a detection transmitting circuit 2 and a receiving circuit 3. The inlet pipe 101 and the pressure sensor body 1 are separate structures. There is an interface 102 with internal threads at the lower middle part of the housing of the pressure sensor body 1. The outer side of the inlet pipe 101 has external threads from top to bottom. The upper end of the inlet pipe 101 and the interface 102 at the lower middle part of the housing are connected. The lower end of the inlet pipe 101 and the internal threaded opening of the pipe are connected by a threaded seal. The power supply mechanism E1 and the detection and transmission circuit 2 are installed in the component box on the upper end of the pressure sensor body. The receiving circuit 3 is installed in the outer shell 4 in the duty room (the outer shell 4 can be carried by relevant personnel). The power input terminals 1 and 2 of the power supply mechanism E1 are connected to the two poles of the 220V power supply by wires. The power output terminals 3 and 4 of the power supply module E1 are connected to the positive power input terminal of the relay K1 and the emitter of the transistor T1 by wires. The other end of the adjustable resistor RP and one end of the resistor R1 at the signal input terminal of the detection and transmission circuit are connected to the two ends of the pressure resistor RT of the pressure sensor body by wires.

[0016] Figure 1 , 2As shown in Figures 3 and 4, the outer diameter of the upper end of the inlet tube 101 is smaller than that of the lower end. The inlet tube 101 is made of rust-proof material. A sealing ring is installed between the inlet tube 101 and the lower end interface of the housing. The detection and transmission circuit includes an adjustable resistor RP, a resistor R1, a relay K1, a transistor T1, and a wireless transmission module E2, all connected via circuit board wiring. One end of the adjustable resistor RP is connected to the positive power input terminal of the relay K1 and the positive power input terminal VCC of the wireless transmission module E2. The other end of the adjustable resistor RP is connected to one end of the resistor R1. The other end of the resistor R1 is connected to the base of the transistor T1. The collector of the transistor T1 is connected to the negative power input terminal of the relay K1. The normally open contact and control contact of the relay K1 are connected to the two contacts under the first transmit button S1 of the wireless transmission module E2, respectively. The emitter of the transistor T1 is connected to the negative power input terminal GHD of the wireless transmission module E2. The receiving circuit includes a battery G1, a power switch D1, a charging socket X1, a casing 4, an LED V1, a resistor R2, and a wireless receiving circuit module E3, all connected via circuit board wiring. The positive terminal of battery G1 is connected to one end of charging socket X1, and then connected in series with power switch D1 to pin 1 of the positive power input terminal of wireless receiving circuit module E3. One power output terminal (pin 3) of wireless receiving circuit module E3 is connected to one end of resistor R2, and the other end of resistor R2 is connected to the positive terminal of LED V1. The negative terminal of LED V1 is connected to pin 2 of the negative power input terminal of wireless receiving circuit module E3, the negative terminal of battery G1, and the other end of charging socket X1. Charging socket X1 is mainly used to charge battery G1 when it is depleted by inserting an external power charger into the socket. Power switch D1 is mainly used to control whether the wireless receiving circuit module is powered on or off. Figure 3 , 4 In this circuit, battery G1 is a 12V / 5Ah model; resistor R2 has a resistance of 1.8K ohms; LED V1 is a yellow LED; power supply module E1 is an AC 220V to DC 12V power supply module; adjustable resistor RP has a resistance of 470K ohms (the larger the resistance, the greater the voltage drop, and vice versa); resistor R1 has a resistance of 1K ohms; wireless transmitter module E2 and wireless receiver module E3 are finished wireless transmitter and receiver modules with a transmission and reception range of 3000 meters; relay K1 is a 12V relay; transistor T1 is a 9013 model.

[0017] Figure 1 , 2As shown in Figures 3 and 4, this utility model is based on a pipeline pressure sensor body 1. The inlet pipe 101 and the pressure sensor body 1 are in a separate structure. When the threads of the inlet pipe 101 are damaged, the damaged inlet pipe 101 can be removed and replaced with a new one. Because the inlet pipe 101 can be replaced, it brings convenience to the user and saves the user's expenses. After turning on the power switch D1, the wireless receiving circuit module E3 is powered on and works. After the 220V power supply enters the power input terminal of the power module E1, the power module E1 outputs a stable 12V DC power supply through pins 3 and 4, which enters the power input terminal of the detection and transmission circuit. The 12V power supply is divided by the adjustable resistor RP and the pressure resistor RT (the higher the detected pressure in the pipeline, the smaller the resistance value of the pressure resistor RT, and the lower the voltage signal output to resistor R1 and related control equipment is, and vice versa). When the pressure in the pipeline is relatively high, that is, when the pipeline is normally inputting and outputting medium, the voltage signal output by the adjustable resistor RP and the pressure resistor RT is reduced and current limited by resistor R1 and enters the transistor T1. The base voltage is lower than the transistor T1's conduction voltage, so the transistor T1 will not conduct, the corresponding relay K1 will not be energized and will not be engaged, and the wireless transmission circuit module E2 will not transmit the first wireless closing signal. When the pressure inside the pipeline is too low, that is, when the pipeline stops inputting or outputting media, the voltage signal output by the adjustable resistor RP and the pressure resistor RT is reduced and current limited by resistor R1 and enters the transistor T1. The base voltage is higher than its starting voltage, so the transistor T1 will conduct and output a low level to the negative power input terminal of the relay K1. The relay K1 will be energized and its control contact and normally open contact will close. Since the control contact and normally open contact of the relay K1 are connected to the two contacts under the first transmit button S1 of the wireless transmission circuit module E2, the wireless transmission circuit module E2 will transmit the first wireless closing signal. Within a 3000-meter range, after the wireless receiving circuit module E3 receives the first wireless signal, its pin 3 outputs a high-level signal. This signal is then stepped down and current-limited by resistor R2 and fed into the power input terminal of LED V1. When LED V1 is powered on, it illuminates to alert the staff that there is a leak in the pipeline or that the pipeline has stopped supplying the medium. This minimizes the risk of equipment malfunctions controlled by pressure sensor output signals (for example, if the pipeline supplies cooling water to related equipment, staff can be informed of the situation immediately after the water supply stops, preventing the related equipment from overheating and malfunctioning).

[0018] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A novel pressure sensor, comprising a pressure sensor body, characterized in that, It also has a detection transmitting circuit and a receiving circuit; the inlet pipe and the pressure sensor body are separate structures, the lower end of the housing of the pressure sensor body has an internally threaded interface, the outer side of the inlet pipe has an external thread, the upper end of the inlet pipe and the lower end of the housing are connected by threads, and the lower end of the inlet pipe and the internal thread opening of the pipe are connected by threads; the detection transmitting circuit is installed in the component box of the pressure sensor body, and the receiving circuit is installed in the outer shell; the signal input terminal of the detection transmitting circuit and the two ends of the pressure resistor of the pressure sensor body are respectively connected by wires.

2. The novel pressure sensor according to claim 1, characterized in that, The outer diameter of the upper end of the inlet pipe is smaller than the outer diameter of the lower end.

3. The novel pressure sensor according to claim 1, characterized in that, The imported pipes are made of rust-proof material.

4. A novel pressure sensor according to claim 1, characterized in that, A sealing ring is installed between the inlet pipe and the lower end interface of the shell.

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