Novel pitot tube explosion-proof high-temperature-resistant waterproof wind speed transmitter

Abstract

The utility model discloses a novel pitot tube explosion-proof high-temperature-resistant waterproof wind speed transmitter, which comprises a PLC end and a wind speed transmitter, the wind speed transmitter is an integrated type transmitter and a split type transmitter, and the split type wind speed transmitter comprises a transmitter main body, a connecting hose and a pitot tube pressure guiding assembly which are assembled in sequence. The transmitter body comprises a shell, a circuit board and a display screen, wherein the circuit board and the display screen are arranged in the shell. The circuit board is electrically connected with the PLC end through a transmission line. On the basis of the pitot tube speed measurement principle, the needed air amount is extremely small, the pitot tube pressure guiding assembly is made of stainless steel materials, erosion of corrosive gas can be effectively prevented, and the performance is stable and reliable even in the severe environment containing inflammable gas or high-temperature dust; and meanwhile, waterproof structures are designed at the joint of the transmitter main body and the connecting hose and the penetrating-out part of the transmission line, so that water vapor and dust can be prevented from entering the transmitter main body, and the measurement precision and the service life of the transmitter main body can be ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of wind speed transmitters, and particularly relates to a new type of pitot tube explosion-proof, high-temperature resistant and waterproof wind speed transmitter. Background Art

[0002] At present, with the development of Industry 4.0, there is a demand for real-time information feedback in production and manufacturing. Intelligent manufacturing needs to always master the operating status of equipment, such as functions like wind flow rate, temperature and humidity, equipment rotation speed, operating time, etc. Currently, mainstream wind speed transmitters are used to detect the wind flow rate or air volume.

[0003] Currently, wind speed transmitters are often applied in harsh environments such as flammable gases, high-temperature gases containing water vapor. Since the air intake part of the wind speed transmitter is in a connected state with the detected position, and the current wind speed transmitter has poor waterproof and dustproof performance, it is easy for internal components of the wind speed transmitter to short-circuit, affecting its use. In addition, when a short-circuit occurs, sparks or flames are generated by internal components, and when the detected gas is flammable, it is easy to cause fire or even explosion accidents.

[0004] In view of this, a new type of pitot tube explosion-proof, high-temperature resistant and waterproof wind speed transmitter is proposed. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a new type of pitot tube explosion-proof, high-temperature resistant and waterproof wind speed transmitter to solve the above-mentioned problems.

[0006] The technical scheme adopted by the utility model is as follows: A new type of pitot tube explosion-proof, high-temperature resistant and waterproof wind speed transmitter includes a PLC terminal and a wind speed transmitter. The wind speed transmitter is of two types: an integrated type and a split type. The split-type wind speed transmitter includes a transmitter main body, a connecting hose, and a pitot tube pressure guiding assembly that are sequentially assembled. The transmitter main body includes a housing, a circuit board, and a display screen arranged inside the housing. The circuit board is electrically connected to the PLC terminal through a transmission line to real-time feedback the wind speed data signal to the PLC terminal. Threaded joints connected to the connecting hose are respectively arranged at two pressure measuring ends of the housing, and a waterproof and breathable membrane is detachably installed inside the threaded joints. The pitot tube pressure guiding assembly includes two pitot tube probes arranged back to back and an assembly threaded seat sleeved on the outer ends of the pitot tube probes. Joints connected to the connecting hose are arranged at the upper ends of the two pitot tube probes.

[0007] In a preferred embodiment, the housing includes an upper shell and a bottom shell that are covered with each other, and both the upper shell and the bottom shell are made of aluminum alloy or stainless steel materials.

[0008] In a preferred embodiment, an explosion-proof glass plate corresponding to the display screen is seamlessly embedded in the upper shell. The display screen is selected from high-temperature-resistant LED display screens, and a plurality of buttons are also integrated on the circuit board.

[0009] In a preferred embodiment, the threaded joint has a hollow air guiding hole. One end of the threaded joint facing the connecting hose is provided with an internal thread surface, and one end of the connecting hose is provided with a thread head adapted to the internal thread surface. When the thread head is installed on the threaded joint, the end of the thread head abuts tightly against the waterproof and breathable membrane.

[0010] In a preferred embodiment, the connecting hose is made of silicone material.

[0011] In a preferred embodiment, a sleeve nut is threadedly connected to the assembly threaded seat. The assembly threaded seat, the pitot tube probe and the joint are all made of stainless steel material, and an end cap seat is integrally provided at the upper end of the assembly threaded seat.

[0012] In a preferred embodiment, the housing has a hole position for the transmission line to extend out, and a waterproof wire locking buckle is provided in the hole position. The waterproof wire locking buckle has a wire locking cavity for the transmission line to pass through, and a sealing ring in interference fit with the transmission line is provided in the wire locking cavity.

[0013] In a preferred embodiment, a plurality of mounting ears with mounting holes are further provided at the outer end of the housing.

[0014] In a preferred embodiment, the integral wind speed transmitter includes a connected transmitter main body and a pitot tube pressure guiding component.

[0015] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present utility model are as follows:

[0016] 1. In the present utility model, the whole is based on the pitot tube speed measurement principle, and the required air volume is extremely small. Moreover, the pitot tube pressure guiding component is made of stainless steel material, which can effectively prevent the erosion of corrosive gases. Even in harsh environments containing flammable gases or high-temperature dust, the performance is equally stable and reliable. Compared with traditional hot film type wind speed sensors, better repeatability in the low-pressure section and more rapid and accurate measurement values of tiny air volume can be obtained, and the accuracy is higher;

[0017] 2. In the present utility model, waterproof structures are designed at the connection between the transmitter main body and the connecting hose and at the penetration of the transmission line. The overall reaches the IP66 waterproof level, which can prevent water vapor and dust from entering the transmitter main body, thereby ensuring the measurement accuracy and service life of the transmitter main body;

[0018] 3. In the present utility model, the transmitter can be connected to the PLC data management device, and the flow rate data of the pipeline to be measured can be fed back to the PLC data acquisition device in real time. The flow rate of the air can be adjusted in a timely manner according to the feedback data, thereby improving the product qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic plan view of the overall structure of the present utility model;

[0020] Figure 2 is a schematic plan view of the pitot tube pressure guiding assembly in the present utility model;

[0021] Figure 3 is a schematic plan view of the transmitter main body in the present utility model;

[0022] Figure 4 is a schematic cross-sectional plan view of the threaded joint in the present utility model;

[0023] Figure 5 is a schematic plan view of the integrated wind speed transmitter.

[0024] Reference numerals in the figures: 1 - transmitter main body, 101 - housing, 102 - explosion-proof glass plate, 103 - display screen, 104 - transmission line, 105 - waterproof cable lock, 106 - threaded joint, 107 - internal thread surface, 108 - waterproof breathable membrane, 2 - connecting hose, 3 - pitot tube pressure guiding assembly, 301 - assembly threaded seat, 302 - pitot tube probe, 303 - end cap seat, 304 - joint, 305 - sleeve nut, 4 - PLC terminal. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not intended to limit the present utility model.

[0026] Referring to Figures 1-5 , a new type of pitot tube explosion-proof, high-temperature resistant and waterproof wind speed transmitter includes a PLC terminal 4 and a wind speed transmitter. The wind speed transmitter is of two types: an integrated type and a split type. The split-type wind speed transmitter includes a transmitter main body 1, a connecting hose 2 and a pitot tube pressure guiding assembly 3 which are assembled in sequence. The transmitter main body 1 includes a housing 101 and a circuit board and a display screen 103 disposed inside the housing 101. The circuit board is electrically connected to the PLC terminal 4 through a transmission line 104, and the wind speed data signal is fed back to the PLC terminal 4 in real time. The transmitter can be connected to the PLC data management device, and the flow rate data of the pipeline to be measured can be fed back to the PLC data acquisition device in real time. The flow rate of the air can be adjusted in a timely manner according to the feedback data, thereby improving the product qualification rate.

[0027] Among them, the PLC terminal 4 can also be externally connected to an audible and visual alarm (not shown in the figure). When the data signal exceeds the set range, it can also control the audible and visual alarm to give an audible and visual alarm, which can remind the staff to make corresponding adjustments in time.

[0028] In addition, a wiring terminal that can be detachably connected to the transmission line 104 is provided on the circuit board, which facilitates the installation and replacement of the transmission line 104.

[0029] Furthermore, two pressure measuring ends of the housing 101 (inside which there is a pressure sensor or a pressure chip electrically connected to the circuit board) are respectively provided with threaded joints 106 connected to the connecting hose 2. A waterproof and breathable membrane 108 is detachably installed inside the threaded joint 106. The waterproof and breathable membrane 108 can satisfy the normal gas permeation while preventing water vapor from entering the main body 1 of the transmitter, thereby ensuring the measurement accuracy and service life of the transmitter main body.

[0030] Furthermore, the pitot tube pressure guiding assembly 3 includes two pitot tube probes 302 arranged back to back and an assembly threaded seat 301 sleeved on the outer ends of the pitot tube probes 302. A sleeve nut 305 is threadedly connected to the assembly threaded seat 301. An end cap seat 303 is integrally provided at the upper end of the assembly threaded seat 301. Joints 304 connected to the connecting hose 2 are provided at the upper ends of both pitot tube probes 302. When installing the pitot tube pressure guiding assembly 3 on the pipeline to be measured, a threaded hole adapted to the assembly threaded seat 301 needs to be correspondingly opened on the pipeline wall. During installation, first screw out the sleeve nut 305 from the assembly threaded seat 301, then screw the assembly threaded seat 301 tightly into the corresponding threaded hole, and then threadedly install the sleeve nut 305 on the assembly threaded seat 301 from the inside of the pipeline wall until the end cap seat 303 and the sleeve nut 305 respectively abut against the inner and outer walls of the pipeline, then the installation operation of the pitot tube pressure guiding assembly 3 can be completed. At the same time, based on the pitot tube velocity measurement principle as a whole, the required air volume is extremely small, and the performance is stable and reliable even in harsh environments containing flammable gases or high-temperature dust. Compared with traditional hot film type wind speed sensors, better repeatability in the low-pressure section and more rapid and accurate measurement values of tiny air volume can be obtained, and the accuracy is higher.

[0031] In addition, in order to ensure the sealing performance at the connection between the assembly threaded seat 301 and the pipeline, a sealing ring can be embedded at the bottom end of the end cap seat 303.

[0032] Furthermore, the housing 101 includes an upper shell and a bottom shell that are covered with each other. Both the upper shell and the bottom shell are made of aluminum alloy or stainless steel. Since aluminum alloy or stainless steel has good properties such as high temperature resistance and corrosion resistance, it can protect the components inside the transmitter.

[0033] Among them, the upper shell and the bottom shell preferably adopt a threaded connection method, but there is no limitation.

[0034] Further, an explosion-proof glass plate 102 corresponding to the display screen 103 is seamlessly embedded in the upper shell. The display screen 103 is selected from high-temperature-resistant LED display screens. Through the display screen 103, the detected data can be intuitively displayed, facilitating the staff to know the current wind speed and air volume. Secondly, as a whole, it is a high-temperature-resistant LED display screen and can also be used in high-temperature environments. Secondly, the designed explosion-proof glass plate 102 can not only satisfy the intuitive viewing of the data displayed on the display screen 103, but also protect the internal components.

[0035] Among them, a plurality of buttons are also integrated on the circuit board. After the upper shell and the lower cover are closed, the circuit board and the buttons can also be protected through the upper shell and the explosion-proof glass plate 102, preventing accidental touch of the buttons and improving the overall waterproof effect.

[0036] When data needs to be adjusted, the upper shell and the lower cover are disassembled, and then the buttons can be operated to make adjustments.

[0037] Further, the threaded joint 106 has a hollow air guiding hole. An internal thread surface 107 is provided at one end of the threaded joint 106 facing the connecting hose 2. One end of the connecting hose 2 is provided with a thread head adapted to the internal thread surface 107. When the thread head is installed on the threaded joint 106, the end of the thread head abuts tightly against the waterproof and breathable membrane 108. The internal thread surface 107 is a two-way (i.e., continuous in both forward and reverse directions) thread. The connecting hose 2 and the threaded joint 106 are connected by a two-way thread, which can also effectively prevent gas leakage and the intrusion of external water or dust.

[0038] Among them, the threaded joint 106 is also installed on the housing 101 by a threaded connection method. When the waterproof and breathable membrane 108 needs to be replaced later, only the threaded joint 106 needs to be separated from the connecting hose 2 and the housing 101, and then the waterproof and breathable membrane 108 can be poured out with a little force.

[0039] Further, the connecting hose 2 is made of silicone material. Since the silicone material has corrosion resistance, it plays a role in transmitting the wind flow rate and pressure under static pressure and dynamic pressure states. Secondly, the connecting hose 2 can be bent to any angle or position at will, facilitating the installation of the transmitter main body 1 to the desired appropriate position.

[0040] Further, the assembly threaded seat 301, the sleeve nut 305, the pitot tube probe 302 and the joint are all made of stainless steel material. Since the stainless steel material can effectively prevent the erosion of corrosive gases, it can be used to detect the gas flow rate in non-flammable gas, flammable gas, and smoke and dust environments.

[0041] Furthermore, the housing 101 has a hole position that allows the transmission line 104 to extend, and a wire locking buckle 105 is provided in the hole position. The waterproof wire locking buckle 105 has a wire locking cavity that allows the transmission line 104 to pass through, and a sealing ring that is in interference fit with the transmission line 104 is provided in the wire locking cavity. The wire locking buckle 105 can ensure the fixation of the transmission line 104 and the waterproof requirement.

[0042] Furthermore, a plurality of mounting ears with mounting holes are provided at the outer end of the housing 101. The mounting ears can facilitate the fixation of the transmitter main body 1 to the desired position by bolts or other fixing members.

[0043] Please refer to Figure 5 As shown, the integrated wind speed transmitter includes a connected transmitter main body 1 and a pitot tube pressure guiding assembly 3. In some application environments, such as when there is no obstruction above the pitot tube pressure guiding assembly 3, the pitot tube pressure guiding assembly 3 can also be directly connected to the transmitter main body 1 to form an integrated wind speed transmitter, which can reduce the overall cost.

[0044] Among them, at this time, the threaded joint 106 is correspondingly arranged below the housing 101. Two hollow air guiding holes are correspondingly provided inside the threaded joint 106. The two air guiding holes are respectively communicated with the two pressure measuring ends and the two pitot tube probes 302. The waterproof wire locking buckle 105 and the hole position are arranged on the side surface of the housing 101 (but not limited to this position), and the transmission line 104 can pass through from the side surface.

[0045] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A new type of pitot tube explosion-proof, high temperature resistant and waterproof wind speed transmitter, including a PLC end and a wind speed transmitter. The wind speed transmitter is of two types: an integrated transmitter and a split transmitter. The split wind speed transmitter includes a transmitter body, a connecting hose and a pitot tube pressure-leading assembly assembled in sequence, characterized in that: The transmitter body includes a housing, a circuit board and a display screen arranged in the housing, and the circuit board is electrically connected to the PLC terminal through a transmission line to feed back the wind speed data signal to the PLC terminal in real time; The two pressure measuring ends of the housing are respectively provided with threaded joints connected to the connecting hose, and a waterproof and breathable membrane is detachably installed inside the threaded joint; The Pitot tube pressure-guiding assembly comprises two Pitot tube probes arranged back to back and an assembly threaded seat sleeved on the outer ends of the Pitot tube probes. The upper ends of the two Pitot tube probes are both provided with connectors connected to the connecting hose.

2. A novel pitot tube explosion-proof, high temperature resistant and waterproof wind speed transmitter as claimed in claim 1, characterized in that: The shell comprises an upper shell and a bottom shell which cover each other, and the upper shell and the bottom shell are both made of aluminum alloy or stainless steel.

3. A novel pitot tube explosion-proof, high temperature resistant and waterproof wind speed transmitter as claimed in claim 2, characterized in that: The upper shell is seamlessly embedded with an explosion-proof glass plate corresponding to the display screen. The display screen is selected from a high-temperature resistant LED display screen. A plurality of buttons are also integrated on the circuit board.

4. A novel pitot tube explosion-proof, high temperature resistant and waterproof wind speed transmitter as claimed in claim 1, characterized in that: The threaded joint has a hollow air ducting hole, and an internal threaded surface is provided at one end of the threaded joint facing the connecting hose. A threaded head matching the internal threaded surface is provided at one end of the connecting hose. When the threaded head is installed on the threaded joint, the end of the threaded head is tightly against the waterproof breathable membrane.

5. A novel pitot tube explosion-proof, high temperature resistant and waterproof wind speed transmitter as claimed in claim 1, characterized in that: The connecting hose is made of silicone material.

6. A novel pitot tube explosion-proof, high temperature resistant and waterproof wind speed transmitter as claimed in claim 1, characterized in that: The assembly thread seat is threadedly connected with a sleeve nut. The assembly thread seat, the sleeve nut, the pitot tube probe and the joint are all made of stainless steel. The upper end of the assembly thread seat is also integrally provided with an end cap seat.

7. A novel pitot tube explosion-proof, high temperature resistant and waterproof wind speed transmitter as claimed in claim 1, characterized in that: The shell has a hole for the transmission line to extend out, and a waterproof locking wire buckle is provided in the hole. The waterproof locking wire buckle has a locking wire cavity for the transmission line to pass through, and a sealing ring with an interference fit with the transmission line is provided in the locking wire cavity.

8. A novel pitot tube explosion-proof, high temperature resistant and waterproof wind speed transmitter as claimed in claim 1, characterized in that: The outer end of the shell is also provided with a plurality of mounting ears with mounting holes.

9. A novel pitot tube explosion-proof, high temperature resistant and waterproof wind speed transmitter as claimed in claim 1, characterized in that: The integrated wind speed transmitter comprises a transmitter body and a Pitot tube pressure-guiding assembly connected to each other.

Images