Tire pressure monitoring device and tire pressure monitoring method

Abstract

The application provides a tire pressure monitoring device, which comprises a valve adapter, an air inlet end of the valve adapter being used for connecting a valve of an aviation tire; a ball valve air rod, the ball valve air rod being capable of being switched between an open state and a closed state, an air inlet end of the ball valve air rod being connected to an air outlet end of the valve adapter; a gas guide pipe, an air inlet end of the gas guide pipe being connected to an air outlet end of the ball valve air rod; a tire pressure sensor, an air outlet end of the gas guide pipe being connected to the tire pressure sensor; and a data processing device, the tire pressure sensor and the data processing device being electrically connected, the data processing device being used for recording tire pressure data collected by the tire pressure sensor and displaying the tire pressure data in real time to draw a tire pressure change curve. Thus, the application solves the problem that it is difficult to continuously measure the tire pressure of the aviation tire in real time in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tire pressure monitoring, in particular to a tire pressure monitoring device and a tire pressure monitoring method. BACKGROUND

[0002] The existing tire pressure monitoring system is generally installed on the rim, and the air pressure in the tire is sensed by the built-in sensor, the air pressure signal is converted into an electrical signal, the signal is transmitted to the receiver through the wireless transmitter, and various data changes are displayed on the display or in the form of a buzzer, etc., so that the driver can timely inflate or deflate the tire according to the display data, and can timely handle the leakage to resolve the major accident in a small place. The pressure sensor installed on the tire is used to measure the air pressure of the tire, the wireless transmitter is used to send the pressure information from the inside of the tire to the central receiver module, and then the tire air pressure data is displayed.

[0003] However, for the aviation tire, due to the high internal air pressure, generally about 3Mpa, it is difficult to install the built-in sensor, and it is difficult to realize real-time continuous measurement of the tire pressure data. In summary, there is a problem of difficulty in real-time continuous measurement of the tire pressure of the aviation tire in the prior art. SUMMARY

[0004] The present application provides a tire pressure monitoring device and a mounting method thereof, which aims to solve the problem of difficulty in real-time continuous measurement of the tire pressure of the aviation tire in the prior art.

[0005] To solve the above problems, the present application provides a tire pressure monitoring device, which comprises: a valve core adapter, the air inlet end of the valve core adapter is used to connect the valve core of the aviation tire; a ball valve air rod, the ball valve air rod can be switched between an open state and a closed state, the air inlet end of the ball valve air rod is connected to the air outlet end of the valve core adapter; a gas guide pipe, the air inlet end of the gas guide pipe is connected to the air outlet end of the ball valve air rod; a tire pressure sensor, the air outlet end of the gas guide pipe is connected to the tire pressure sensor; a data processing device, the tire pressure sensor and the data processing device are electrically connected, used to record the tire pressure data collected by the tire pressure sensor, and real-time display of the tire pressure data to draw a tire pressure change curve.

[0006] In one embodiment, the valve stem adapter includes: a valve pin, the first end and the second end of which are respectively defined as the air inlet and air outlet of the valve stem adapter; an air inlet channel is provided inside the valve pin, penetrating the air inlet and air outlet of the valve pin; and external threads are provided on the outer periphery of both ends of the valve pin; a locking ring, the inner periphery of which is provided with internal threads; one end of the locking ring is threadedly connected to the first end of the valve pin; the other end of the locking ring is used to lock with the valve stem of an aircraft tire; and the first end of the valve pin is used to compress the valve core rod of the valve stem; and the second end of the valve pin is threadedly connected to the air inlet of the ball valve stem.

[0007] In one embodiment, the valve ejector pin includes an ejector pin portion, a first connecting portion, a main body portion, and a second connecting portion arranged coaxially in sequence. The main body portion protrudes radially outward relative to both the first and second connecting portions, and the first connecting portion protrudes radially outward relative to the ejector pin portion. Both the first and second connecting portions are provided with external threads. The second connecting portion is connected to the air inlet end of the ball valve stem. The first connecting portion is threadedly connected to the locking ring, and the ejector pin portion is completely accommodated within the locking ring. The valve ejector pin is pressed by the valve stem of the valve nozzle through the ejector pin portion.

[0008] In one embodiment, the valve stem adapter further includes a first sealing ring, which is sleeved on the outer periphery of the first connecting portion, and the locking ring is connected to the outer periphery of the first connecting portion and cooperates with the main body portion to press against it through the first sealing ring.

[0009] In one embodiment, the valve stem adapter further includes a second sealing ring, which is sleeved on the second connecting portion. The second connecting portion extends into the air inlet end of the ball valve stem, and the ball valve stem is pressed against the main body through the second sealing ring.

[0010] In one embodiment, the locking ring has a first segment and a second segment connected in sequence and coaxially arranged. The inner circumferential diameter of the first segment is smaller than that of the second segment, so as to form a stepped portion at the connection between the first segment and the second segment on the inner circumferential wall of the locking ring. The valve stem adapter further includes a third sealing ring, which is located inside the second segment and abuts against the stepped portion. The third sealing ring is sleeved on the outer circumference of the ejector pin portion, which is used to extend into the valve stem of the valve stem. The valve stem is abutted by the third sealing ring and the first connecting portion.

[0011] In an embodiment, the length of the needle part is not less than 2mm and not more than 4mm, and the distance between the first end of the needle part and the first end of the locking ring is not less than 2mm and not more than 4mm.

[0012] In an embodiment, the tire pressure monitoring device further comprises a quick connector, the quick connector comprises a male head and a female head connected to each other, the female head of the quick connector is arranged at the air outlet end of the ball valve air rod, and the male head of the quick connector is arranged at the air inlet end of the air guide pipe.

[0013] The application also provides a mounting method of the tire pressure monitoring device, which is used for mounting the tire pressure monitoring device described above, and the method comprises the following steps:

[0014] S1, connecting the air outlet end of the air valve adapter and the air inlet end of the ball valve air rod, at this time the ball valve air rod is in a closed state;

[0015] S2, connecting the air inlet end of the air valve adapter to the air valve of the tire;

[0016] S3, connecting the air outlet end of the ball valve air rod and the air inlet end of the air guide pipe, and connecting the air outlet end of the air guide pipe and the tire pressure sensor;

[0017] S4, opening the ball valve air rod.

[0018] In an embodiment, between step S2 and step S3, and between step S4 and step S5, the method further comprises the following steps:

[0019] Detecting the air tightness of each connection.

[0020] The application provides a tire pressure monitoring device and a mounting method of the tire pressure monitoring device. Specifically, the tire pressure monitoring device has an external tire pressure sensor and a data processing device, the tire pressure sensor and the data processing device are electrically connected, are used for recording the tire pressure data collected by the tire pressure sensor, and display the tire pressure data in real time to draw a tire pressure change curve. In this way, the problem that it is difficult to continuously measure the tire pressure of an aviation tire in real time in the prior art is solved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic diagram of the tire pressure monitoring device of the embodiment of the application;

[0022] Figure 2 is Figure 1 a structural schematic diagram of the air valve adapter in the embodiment of the application;

[0023] Figure 3 is Figure 2 a sectional view of A-A in the embodiment of the application;

[0024] Figure 4 isFigure 3 Cross-sectional view of the middle locking ring.

[0025] Reference Name Reference Name 10 Valve adapter 11 Valve needle 111 Needle part 112 First connecting part 113 Main body part 114 Second connecting part 12 Locking ring 121 First section 122 Second section 131 First sealing ring 132 Second sealing ring 133 Third sealing ring 20 Ball valve stem 30 Quick connector 40 Air duct 50 Tire pressure sensor 60 Data processing device DETAILED DESCRIPTION

[0026] The specific embodiments of the present application will be further described in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application, but are not used to limit the scope of the present application.

[0027] The existing tire pressure monitoring system is generally installed on the rim, and the air pressure in the tire is sensed by the built-in sensor, the air pressure signal is converted into an electrical signal, the signal is transmitted to the receiver through the wireless transmitter, and various data changes are displayed on the display or in the form of a buzzer, etc. The driver can timely inflate or deflate the tire according to the display data, find the leakage and handle it in time, and resolve the major accident in a small place. The pressure sensor installed on the tire is used to measure the air pressure of the tire, the wireless transmitter is used to send the pressure information from the inside of the tire to the central receiver module, and then the tire air pressure data is displayed.

[0028] However, for the aviation tire, due to the high internal air pressure, generally about 3Mpa, it is difficult to install the built-in sensor, and it is difficult to realize the real-time continuous measurement of the tire pressure data. In summary, there is a problem that it is difficult to realize the real-time continuous measurement of the tire pressure of the aviation tire in the prior art.

[0029] The present application provides a tire pressure monitoring device, comprising: a valve adapter 10, the air inlet end of the valve adapter 10 is used to connect the valve of the aviation tire; a ball valve air rod 20, the ball valve air rod 20 can be switched between the open state and the closed state, the air inlet end of the ball valve air rod 20 is connected to the air outlet end of the valve adapter 10; a gas guide pipe 40, the air inlet end of the gas guide pipe 40 is connected to the air outlet end of the ball valve air rod 20; a tire pressure sensor 50, the air outlet end of the gas guide pipe 40 is connected to the tire pressure sensor 50; a data processing device 60, the tire pressure sensor 50 and the data processing device 60 are electrically connected, used to record the tire pressure data collected by the tire pressure sensor 50, and real-time display the tire pressure data to draw the tire pressure change curve.

[0030] During the tire testing process, it is necessary to monitor the change value of tire pressure in a period of time. The object tested by the system generally has a tire pressure of more than 3 MPa. The ordinary tire pressure gauge can only display the reading in real time, and does not have the functions of continuous measurement and data recording. Therefore, the application provides a tire pressure monitoring device to solve the problem of continuous measurement and recording of tire pressure data. Further, the data processing device 60 includes a computer program, a USB power supply and communication module, a cable, and a data acquisition circuit. The main function of the computer program is to issue instructions, control the start and stop of the acquisition circuit, set the acquisition parameters, display the tire pressure data in real time, draw the tire pressure change curve, and continuously record the measurement results for analysis. The USB power supply and communication module are responsible for supplying 5V power from the USB port to the data acquisition circuit through the cable. The data acquisition circuit includes 5V to 24V voltage conversion, analog-to-digital conversion, and 485 / 232 communication functions. The 24V voltage is used to power the sensor. The voltage signal output by the sensor is converted into a digital quantity by the module and sent to the computer through 485 or 232 communication.

[0031] In an embodiment, the tire pressure sensor 50 is a piezoresistive sensor, which is a type of pressure sensor. In this example, a diffused silicon pressure sensor is used. When a pressure signal acts on the sensor, the pressure sensor converts the pressure signal into an electrical signal, which is amplified by a differential amplifier and an output amplifier to become a voltage signal.

[0032] The application also provides a test and data processing method for a tire pressure monitoring device, which is mainly used for processing real-time tire pressure change data during the static testing process of an aviation tire, and determining whether to continue testing according to the dynamic pressure difference. The software control instructions are issued by a computer, and the collected tire pressure data are continuously recorded in a file for determining whether to continue testing, or analyzing the pressure difference change of the tire during the whole process. Specifically, the test method includes the following steps: after starting the test, reading the sensor settings, including precision, unit, and zero drift, reading the user settings, including frequency and acquisition time, and recording the initial tire pressure value. Next, start collecting real-time data, calculate the dynamic pressure difference by subtracting the initial tire pressure from the real-time tire pressure, determine whether the dynamic pressure difference exceeds the upper and lower threshold values, and the threshold values are generally determined as a percentage of the initial tire pressure, for example, ±1%. If the dynamic pressure difference exceeds the threshold value, stop the test. If the dynamic pressure difference does not exceed the threshold value, continue the test. Finally, stop the test when the acquisition time is reached.

[0033] In an embodiment, the valve adapter 10 comprises a valve needle 11, the first end and the second end of the valve needle 11 define the air inlet end and the air outlet end of the valve adapter respectively, the valve needle 11 is provided with an air inlet channel penetrating through the air inlet end and the air outlet end of the valve needle 11, and the outer periphery of both ends of the valve needle 11 is provided with external threads; a locking ring 12, the inner periphery of the locking ring 12 is provided with internal threads, one end of the locking ring 12 is connected to the first end of the valve needle 11 through the internal threads, the other end of the locking ring 12 is used for locking with the valve of the aircraft tire, and the first end of the valve needle 11 is used for extruding the valve stem of the valve, and the second end of the valve needle 11 is connected with the air inlet end of the ball valve air rod 20 through threads.

[0034] In this application, the valve adapter 10, the ball valve air rod 20, the air guide pipe 40, and the tire pressure sensor 50 are connected, and the tire pressure sensor 50 is connected to the data processing device 60, the change value of the tire pressure in a period of time is monitored, and the tire pressure change curve is drawn for analysis. In this way, the tire pressure sensor 50 does not need to be built into the aircraft tire, so as to overcome the defect that the tire pressure sensor 50 is difficult to be placed in the aircraft tire with high tire pressure. The valve adapter 10 comprises the valve needle 11 and the locking ring 12. The locking ring 12 is used for locking the valve needle 11 and the valve. Further, the reliability of the connection between the valve needle 11 and the valve is improved, so that it is not easy to be loosened. Further, the locking ring 12 and the valve needle 11, and the ball valve air rod 20 and the valve needle 11 are connected in a threaded connection mode, which is simple in structure, reliable in connection, and convenient to assemble and disassemble.

[0035] In an embodiment, the valve needle 11 comprises a needle part 111, a first connecting part 112, a main body part 113, and a second connecting part 114 which are coaxially arranged in sequence, the main body part 113 is radially outward relative to the first connecting part 112 and the second connecting part 114, and the first connecting part 112 is radially outward relative to the needle part 111, the first connecting part 112 and the second connecting part 114 are provided with external threads, the second connecting part 114 is connected with the air inlet end of the ball valve air rod 20, the first connecting part 112 is connected with the locking ring 12 through threads, and the needle part 111 is completely accommodated in the locking ring 12, and the valve needle 11 is extruded by the valve stem of the valve through the needle part 111.

[0036] Specifically, the inner 8V1 thread is arranged on the inner periphery of the air inlet end of the ball valve air rod 20, and the outer thread arranged on the second connecting part 114 is matched with the inner 8V1 thread, and the threaded connection has high reliability. The ball valve air rod 20 is necessary to be arranged, because a plurality of connecting parts are arranged between the threaded connection port of the tire pressure sensor 50 and the air valve adapter 10, so that the installation time of the tire pressure monitoring device is relatively long. Therefore, the ball valve air rod 20 is arranged to reduce the installation difficulty of the tire pressure monitoring device.

[0037] The air valve adapter 10 further comprises a first sealing ring 131, the first sealing ring 131 is sleeved on the outer periphery of the first connecting part 112, and the locking ring 12 is connected to the outer periphery of the first connecting part 112, and is pressed by the first sealing ring 131 and the main body part 113.

[0038] In an embodiment, the air valve adapter 10 further comprises a second sealing ring 132, the second sealing ring 132 is sleeved on the second connecting part 114, the second connecting part 114 extends into the air inlet end of the ball valve air rod 20, and the ball valve air rod 20 is pressed by the second sealing ring 132 and the main body part 113.

[0039] In an embodiment, the locking ring 12 has a first section 121 and a second section 122 which are connected in sequence and coaxially arranged, the inner periphery diameter of the first section 121 is smaller than the inner periphery diameter of the second section 122, so as to form a stepped part at the connecting part of the first section 121 and the second section 122; the air valve adapter 10 further comprises a third sealing ring 133, the third sealing ring 133 is located in the second section 122 and is pressed by the stepped part, the third sealing ring 133 is sleeved on the outer periphery of the needle part 111, and the needle part 111 is used to extend into the air valve core rod of the air valve, and the air valve core rod is pressed by the third sealing ring 133 and the first connecting part 112.

[0040] In the tire pressure monitoring process, in order to ensure the accuracy of monitoring, the air tightness of the monitoring device is particularly important. Therefore, the first sealing ring 131, the third sealing ring 133 and the second sealing ring 132 are arranged to seal the connection between the locking ring 12 and the air valve needle 11, the connection between the air valve needle 11 and the air valve, and the connection between the ball valve air rod 20 and the air valve needle 11. Because the main body part 113 is radially outward relative to the first connecting part 112 and the second connecting part 114, and the first connecting part 112 is radially outward relative to the needle part 111, the arrangement facilitates the sleeving of the sealing rings, and the structure is simple and compact, facilitating debugging and maintenance.

[0041] In an embodiment, the first sealing ring 131 can adopt a rubber gasket with an inner diameter of 8 mm, an outer diameter of 15 mm, and a thickness of 1 mm. The third sealing ring 133 is arranged at the boundary between the two threaded sections inside the locking ring 12, and can adopt a silica gel with good sealing performance, with an inner diameter of 4 mm, an outer diameter of 9 mm, and a thickness of 2 mm. The second sealing ring 132 is an O-shaped sealing ring with an outer diameter of 7.5 mm and a line diameter of 1.5 mm.

[0042] The locking ring 12 is used to lock the valve needle 11 and the valve stem of the aviation tire. Further, the inner wall of the locking ring 12 is respectively provided with an inner thread matched with the valve needle 11 and an inner thread matched with the outer wall of the valve stem. Optionally, the upper hole of the locking ring 12 is an M8 inner thread, and the lower hole is an 8V1 inner thread connected with the valve stem. Further, since the valve stem and the first connecting section 112 have different sizes, the inner diameter of the first section is smaller than that of the second section. The third sealing ring 133 is arranged at the transition step between the first section and the second section. Specifically, the outer circumferential surface of the third sealing ring 133 is in contact with the second section, the inner surface is in contact with the needle section 111, and the upper side is in abutment with the first connecting section, so as to achieve a better sealing effect.

[0043] In an embodiment, the length of the needle section 111 is not less than 2 mm and not greater than 4 mm, and the distance between the first end of the needle section 111 and the first end of the locking ring 12 is not less than 2 mm and not greater than 4 mm. Optionally, the length of the needle section 111 is 3 mm, and the distance between the end face of the first end of the needle section 111 and the end face of the first end of the locking ring 12 is 3.3 mm. This arrangement allows the needle section 111 to be completely accommodated in the locking ring 12, and the size of the locking ring 12 is matched with the length of the valve core rod of the valve needle 11 and the valve stem.

[0044] In an embodiment, the tire pressure monitoring device further comprises a quick connector 30, the quick connector 30 comprises a male head and a female head connected to each other, the female head of the quick connector 30 is arranged at the air outlet end of the ball valve air stem 20, and the male head of the quick connector 30 is arranged at the air inlet end of the air guide pipe 40. Specifically, the air guide pipe 40 is a high-pressure air pipe, both ends of which are pressed into R1 / 4 threaded interfaces, and the length is 3m. The male head of the quick connector 30 is threadedly connected to the air inlet end of the high-pressure air pipe. Further, the detection port of the tire pressure sensor 50 is also provided with a thread, which is matched with the air outlet end of the high-pressure air pipe. Threaded connection is a widely used detachable fixed connection, which has the advantages of simple structure, reliable connection, and convenient assembly and disassembly. Further, the structure of the quick connector 30 facilitates quick connection and disassembly when measuring the tire pressure, and makes the installation of the tire pressure monitoring device more convenient. At the same time, since the length of the air guide pipe 40 is relatively long, and the ball valve air stem 20 is connected to the aircraft tire through the air valve adapter 10, and the air valve adapter 10 and the aircraft tire are fixed together. If threaded connection is used, whether the ball valve air stem 20 is screwed or the air guide pipe 40 is screwed, it has a relatively large operation difficulty. Therefore, the quick connector 30 is used to connect the air guide pipe 40 and the ball valve air stem 20.

[0045] The application also provides an installation method of the tire pressure monitoring device, which is used for installing the tire pressure monitoring device described above, and the method comprises the following steps:

[0046] S1, connecting the air outlet end of the air valve adapter 10 and the air inlet end of the ball valve air stem 20, at this time the ball valve air stem 20 is in a closed state;

[0047] S2, connecting the air inlet end of the air valve adapter 10 to the air valve of the aircraft tire;

[0048] S3, connecting the air outlet end of the ball valve air stem 20 and the air inlet end of the air guide pipe 40, and connecting the air outlet end of the air guide pipe 40 and the tire pressure sensor 50;

[0049] S4, opening the ball valve air stem 20.

[0050] Further, before step S1, the air valve adapter 10 needs to be assembled, please refer to Figure 2 、 Figure 3The first sealing ring 131 is sleeved on the first connecting part 112 and abuts against the main body part 113, and the third sealing ring 133 is sleeved on the needle part 111 and abuts against the first connecting part 112. Secondly, the locking ring 12 is sleeved on the valve needle 11 from the first end of the main body part 113, and the locking ring 12 is tightened by a tool, so that the locking ring 12 and the first connecting part 112 are threadedly connected. Then, the second sealing ring 132 is sleeved on the outer periphery of the second connecting part 114 and abuts against the main body part 113. At this time, the valve nozzle adapter 10 is assembled, and step S1 is started, that is, the outer thread of the second connecting part 114 is connected with the inner thread of the ball valve stem 20, and is tightened by the main body part 113. In an embodiment, the outer periphery of the main body part 113 and the outer periphery of the locking ring 12 are provided in a hexagonal prism shape for facilitating tightening. Subsequently, the assembled valve nozzle adapter 10 and the ball valve stem 20 are connected to the air-filled aviation tire, and the air tightness of each connection is checked by using soap water. The female head of the quick connector 30 is connected to the gas outlet end of the ball valve stem 20, and the male head of the quick connector 30 is connected to the gas inlet end of the air guide pipe 40. Then, the gas inlet end of the air guide pipe 40 and the gas outlet end of the ball valve stem 20 are connected through the male head and the female head of the quick connector 30. Then, the end of the air guide pipe 40 is connected to the threaded detection port of the tire pressure sensor 50. Subsequently, the ball valve stem 20 is switched to an open state, so that the pipeline is in a pass-through state, and the air tightness of each connection is checked. After completion, the tire pressure sensor 50 and the data processing device 60 are connected, and the data processing device 60 is controlled to start working, and one measurement is completed.

[0051] In an embodiment, between step S2 and step S3, and between step S4 and step S5, the following steps are further included:

[0052] The air tightness of each connection is detected.

[0053] Specifically, whether each connection leaks can be checked by using soap water, or other methods can also be used. This step can effectively prevent the tire pressure monitoring device from leaking and affecting the detection effect.

[0054] The above is only a preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and substitutions can be made, and these improvements and substitutions should also be considered as the protection scope of the present application.

Claims

1. A tire pressure monitoring device, characterized by, The utility model relates to a kind of aviation tire pressure monitoring system, comprising: valve adapter, the air inlet end of the valve adapter is used to connect the valve of aviation tire; Ball valve gas rod, the air inlet end of the ball valve gas rod is connected to the air outlet end of the valve adapter; Air guide pipe, the air inlet end of the air guide pipe is connected to the air outlet end of the ball valve gas rod; Tire pressure sensor, the air outlet end of the air guide pipe is connected to the tire pressure sensor; Data processing device, the tire pressure sensor and the data processing device are electrically connected, for recording the tire pressure data collected by the tire pressure sensor, and real-time display tire pressure data to draw tire pressure change curve; The valve adapter comprises: valve needle, the first end and the second end of the valve needle define the air inlet end and the air outlet end of the valve adapter respectively, the valve needle is provided with air inlet channel that passes through the air inlet end and the air outlet end of the valve needle, and the outer periphery of both ends of the valve needle is provided with external thread; Locking ring, the inner periphery of the locking ring is provided with internal thread, one end of the locking ring is connected to the first end of the valve needle through the internal thread, the other end of the locking ring is used to lock with the valve of aviation tire, and the first end of the valve needle is used to extrude the valve core rod of the valve, the second end of the valve needle is connected to the air inlet end of the ball valve gas rod through thread; The valve needle comprises needle part, first connecting part, main body part, second connecting part arranged coaxially in sequence, the main body part is radially convex relative to the first connecting part and the second connecting part, and the first connecting part is radially convex compared with the needle part, the first connecting part and the second connecting part are provided with external thread, the second connecting part is connected to the air inlet end of the ball valve gas rod, the first connecting part is threadedly connected with the locking ring, and the needle part is completely contained in the locking ring, the valve needle is extruded by the valve core rod of the valve through the needle part; The valve adapter further comprises a first sealing ring, the first sealing ring is sleeved on the outer periphery of the first connecting part, and the locking ring is connected to the outer periphery of the first connecting part, and is pressed by the main body part through the first sealing ring; The valve adapter further comprises a second sealing ring, the second sealing ring is sleeved on the second connecting part, the second connecting part extends into the air inlet end of the ball valve gas rod, and the ball valve gas rod is pressed by the second sealing ring and the main body part; The locking ring has first segment and second segment connected in sequence and arranged coaxially, the inner periphery diameter of the first segment is smaller than the inner periphery diameter of the second segment, to form step portion at the connecting place of the inner periphery wall of the locking ring at the first segment and the second segment;The valve adapter further comprises a third sealing ring, the third sealing ring is located in the second segment and pressed by the step portion, and the third sealing ring is sleeved on the outer periphery of the needle part, the needle part is used to extend into the valve core rod of the valve, and the valve core rod is pressed by the third sealing ring and the first connecting part.

2. The tire pressure monitoring device of claim 1, wherein The length of the ejector pin part is not less than 2mm and not more than 4mm, and the distance between the first end of the ejector pin part and the first end of the locking ring is not less than 2mm and not more than 4mm.

3. The tire pressure monitoring apparatus according to any one of claims 1 to 2, characterized by The tire pressure monitoring device further comprises a quick connector, the quick connector comprises a male head and a female head connected with each other, the female head of the quick connector is arranged at the air outlet end of the ball valve air rod, and the male head of the quick connector is arranged at the air inlet end of the air guide pipe.

4. A mounting method of a tire pressure monitoring device, for mounting the tire pressure monitoring device according to any one of claims 1 to 3, characterized by, The method comprises the following steps: S1, connecting the air outlet end of the air valve adapter and the air inlet end of the ball valve air rod, at this time the ball valve air rod is in a closed state; S2, connecting the air inlet end of the air valve adapter to the air valve of the tire; S3, connecting the air outlet end of the ball valve air rod and the air inlet end of the air guide pipe, and connecting the air outlet end of the air guide pipe and the tire pressure sensor; S4, opening the ball valve air rod.

5. The method of installing a tire pressure monitoring device according to claim 4, wherein Between step S2 and step S3, and between step S4 and step S5, the following steps are further included: Detecting the air tightness of each connection.

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