CN111038186A - Built-in tire pressure detection device - Google Patents
Built-in tire pressure detection device Download PDFInfo
- Publication number
- CN111038186A CN111038186A CN201911419103.0A CN201911419103A CN111038186A CN 111038186 A CN111038186 A CN 111038186A CN 201911419103 A CN201911419103 A CN 201911419103A CN 111038186 A CN111038186 A CN 111038186A
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- CN
- China
- Prior art keywords
- valve
- valve cover
- fixedly connected
- air pressure
- built
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0401—Signalling devices actuated by tyre pressure mounted on the wheel or tyre characterised by the type of alarm
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0401—Signalling devices actuated by tyre pressure mounted on the wheel or tyre characterised by the type of alarm
- B60C23/0403—Mechanically generated audible signals, e.g. by buzzer or whistle signals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0491—Constructional details of means for attaching the control device
- B60C23/0493—Constructional details of means for attaching the control device for attachment on the tyre
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C29/00—Arrangements of tyre-inflating valves to tyres or rims; Accessories for tyre-inflating valves, not otherwise provided for
- B60C29/002—Arrangements of tyre-inflating valves to tyres or rims; Accessories for tyre-inflating valves, not otherwise provided for characterised by particular features of the valve core
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C29/00—Arrangements of tyre-inflating valves to tyres or rims; Accessories for tyre-inflating valves, not otherwise provided for
- B60C29/06—Accessories for tyre-inflating valves, e.g. housings, guards, covers for valve caps, locks, not otherwise provided for
- B60C29/066—Valve caps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention relates to the technical field of tire pressure detection, in particular to a built-in tire pressure detection device, which comprises a detection device body, a valve inside, a valve cock and a valve cover, wherein the top of the detection device body is fixedly connected with the valve inside, the bottom of the valve inside is fixedly connected with the valve cock, the bottom end of the valve cock is movably connected with the valve cover, the bottom of the interior of the valve cover is fixedly connected with an alarm, the middle of the interior of the valve cover is fixedly connected with an air pressure sensor, the air pressure sensor and a control circuit board can continue to carry out detection and comparison, when an air pressure test value and an air pressure setting value are not equal to each other, the control circuit board can start the alarm, and the alarm can be lightened after being started, so that a user can know whether the air pressure in a tire is normal or not through whether the alarm is lightened, and the user can conveniently, the condition that the user can not know the internal air pressure of the tire from the outside in time is avoided.
Description
Technical Field
The invention relates to the technical field of tire pressure detection, in particular to a built-in tire pressure detection device.
Background
The tire pressure detection has the functions of automatically detecting the tire pressure in real time in the driving process of the automobile and giving an alarm on the air leakage and low air pressure of the tire so as to ensure the driving safety. When the automobile runs, if the tire pressure is too high, the contact area between the tire and the ground can be reduced, the pressure born by the tire is relatively increased, and the grip of the tire can be influenced. In addition, when a vehicle passes through a sill or a bumpy road surface, there is not enough space in the tire to absorb shock, which not only affects the driving stability and riding comfort, but also causes an increase in impact force on the suspension system, thereby also causing damage. Meanwhile, the hidden danger of tire burst at high temperature is correspondingly increased. Tire pressure detection is divided into two categories: the direct tire pressure detection and the indirect tire pressure detection are divided into two types, one is a built-in tire pressure detection mechanism, and the other is an external tire pressure detection mechanism.
At present, the effect of detecting air pressure is achieved through simple detection when a tire pressure detecting device is used, and the detecting device is built-in and has no alarm device, so that workers cannot understand the result after detecting the air pressure carefully, and when a tire is inflated, the inflated air cannot avoid the existence of some dust, so that the air in the tire generates impurities to influence the detection, but the detecting device needs to be in direct contact with the air pressure for detecting the tire, so that the condition that the detected air pressure is inaccurate due to the fact that the air pressure generates buffering is avoided.
Therefore, how to design a built-in tire pressure detecting device becomes a problem to be solved at present.
Disclosure of Invention
The invention aims to provide a built-in tire pressure detection device, which is used for solving the problems of no alarm, inaccurate detection of air pressure and the like in the background technology.
In order to solve the technical problems, the technical scheme of the invention is a built-in tire pressure detection device, which comprises a detection device main body, a valve inside, a valve cock and a valve cover, wherein the valve inside is fixedly connected to the top of the detection device main body, the valve cock is fixedly connected to the bottom of the valve inside, the valve cover is movably connected to the bottom end of the valve cock, an alarm is fixedly connected to the bottom inside of the valve cover, an air pressure sensor is fixedly connected to the middle inside of the valve cover, a push column is fixedly connected to the top of the alarm, air inlets are connected to two sides of the top of the push column in a penetrating manner, a control circuit board is fixedly connected to one side inside of the valve cover, a storage battery is fixedly connected to the other side inside of the valve cover, a magnet charging port is fixedly connected to the other side of the storage battery, the bottom embedding of inflating valve is connected with the inflation inlet, the centre swing joint of inflation inlet has the support frame, one side bottom fixedly connected with expanding spring of support frame, the inside bottom fixedly connected with rubber outer loop of inflation inlet.
Preferably, the periphery of the valve cover is fixedly connected with an anti-slip sleeve.
Preferably, the two sides of the bottom of the pushing column are fixedly connected with rubber inner rings.
Preferably, a connecting port is embedded and connected in the middle of the top of the valve cover.
Preferably, the valve cover is composed of an alarm at the bottom inside the valve cover, an air pressure sensor in the middle inside the valve cover, a pushing column at the top of the alarm, air inlets at two sides of the top of the pushing column and a control circuit board at one side inside the valve cover.
Preferably, the filtering mechanism is composed of the inflating valve, the valve cover, the filter element, the supporting frame, the telescopic spring and the inflating port.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the valve cover is composed of the alarm, the air pressure sensor, the pushing column, the air inlet and the control circuit board, and a user can know whether the air pressure in the tire is normal or not through whether the alarm is on or not, so that the user can conveniently detect and know the air pressure in the tire through the valve cover, and the condition that the user cannot timely know the air pressure in the tire from the outside is avoided.
2. According to the invention, the inflating valve, the valve cover, the filter element, the support frame, the telescopic spring and the inflating port form the filter mechanism together, so that the gas in the tire can directly contact with the air pressure sensor in the valve cover through two sides of the support frame, and the condition that the gas is directly filtered by the filter element to offset a part of the gas, so that the air pressure result detected by the air pressure sensor is inaccurate is avoided.
Drawings
FIG. 1 is a schematic view of an overall cross-sectional structure according to the present invention;
FIG. 2 is an enlarged schematic view of the structure at the position A;
FIG. 3 is a schematic view of the valve cover in elevation according to the present invention;
FIG. 4 is a schematic view of the flow of the valve cover according to the present invention
In the figure: 1-a detection device body; 2-valve inside; 3-inflating valve; 4-valve cover; 401-air pressure sensor; 402-an air inlet; 403-a control circuit board; 404-a battery; 405-a magnet charging port; 406-an alarm; 407-inner rubber ring; 408-a push column; 409-connecting port; 5-a filter element; 6-anti-slip sleeve; 7-a support frame; 8-a telescopic spring; 9-rubber outer ring; 10-an inflation inlet.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in FIGS. 1-4, the invention discloses a built-in tire pressure detecting device, which comprises a detecting device body 1, a valve core 2, a valve 3 and a valve cover 4, wherein the top of the detecting device body 1 is fixedly connected with the valve core 2, the bottom of the valve core 2 is fixedly connected with the valve 3, the bottom end of the valve 3 is movably connected with the valve cover 4, the inner bottom of the valve cover 4 is fixedly connected with an alarm 406, the middle of the inner part of the valve cover 4 is fixedly connected with an air pressure sensor 401, the top of the alarm 406 is fixedly connected with a push column 408, two sides of the top of the push column 408 are connected with an air inlet 402 in a penetrating way, one side of the inner part of the valve cover 4 is fixedly connected with a control circuit board, the other side of the inner part of the valve cover 4 is fixedly connected with a storage battery 404, the other side of the storage battery, the bottom of the inflating valve 3 is connected with an inflating opening 10 in an embedded mode, the middle of the inflating opening 10 is movably connected with a supporting frame 7, the bottom of one side of the supporting frame 7 is fixedly connected with an expansion spring 8, and the bottom of the inner portion of the inflating opening 10 is fixedly connected with a rubber outer ring 9.
Preferably, the peripheral fixedly connected with antiskid cover 6 of valve bonnet 4, when the user will hand valve bonnet 4 and take off from inflating valve 3, can produce the condition that drops because of valve bonnet 4 is less not good to take, so set up one deck antiskid cover 6 in valve bonnet 4 outside, the surface of antiskid cover 6 is equipped with unevenness's anti-skidding line, make the frictional force grow between valve bonnet 4 and the user's hand, the condition that the user produced and drops because of less not taking when using the valve bonnet has been avoided from the face.
Preferably, the rubber inner ring 407 is fixedly connected to both sides of the bottom of the pushing post 408, after the valve cover 4 and the valve nozzle 3 are fixed, the rubber inner ring 407 inside the valve cover 4 and the rubber outer ring 9 inside the valve nozzle 3 are bonded, and both the rubber inner ring 407 and the rubber outer ring 9 are in a ring shape, so that when the valve cover 4 drives the rubber inner ring 407 to extrude into the rubber outer ring 9, the joint between the valve cover 4 and the valve nozzle 3 is better sealed due to better bonding between the rubber inner ring 407 and the rubber outer ring 9, and the condition that air leakage occurs at the joint between the valve cover 4 and the valve nozzle 3 is avoided.
Preferably, the middle embedding in the top of valve cover 4 is connected with connecting port 409, when the user will be connected valve cover 4 and inflating valve 3, the user will hold valve cover 4 and drive connecting port 409 and inflating valve 3 and align, and because of the internal thread of connecting port 409 and the external screw thread of inflating valve 3 are the back of laminating each other, so the user only needs to carry out the overlap joint through threaded connection with between connecting port 409 and the inflating valve 3 and fix, and after connecting between connecting port 409 and inflating valve 3, valve cover 4 also reaches the effect of connecting with inflating valve 3, and because of threaded connection is common fixed mode, so convenience of customers is fast with connecting between valve cover 4 and the inflating valve 3.
Preferably, the valve cover 4 is composed of an alarm 406 at the bottom inside the valve cover 4, an air pressure sensor 401 at the middle inside the valve cover 4, a pushing column 408 at the top of the alarm 406, air inlets 402 at two sides of the top of the pushing column 408, and a control circuit board 403 at one side inside the valve cover 4, after the valve cover 4 and the valve mouth 3 are connected, the air inlets 402 at two sides of the top of the pushing column 408 introduce the tire gas transmitted from the valve mouth 3 to the air pressure sensor 401, and the air pressure sensor 401 detects the air pressure of the introduced gas and transmits the detected air pressure effect to the control circuit board 403, wherein the control circuit board 403 is internally provided with a value related to normal air pressure, so that when the air pressure sensor 401 transmits the data after air pressure detection to the control circuit board 403, the control circuit board 403 compares the air pressure test value with the air pressure setting value, when being equal to between atmospheric pressure test value (baroceptor 401) and the atmospheric pressure numerical value (control circuit board 403), baroceptor 401 and control circuit board 403 can continue to detect the contrast, and when not equal to between atmospheric pressure test value and the atmospheric pressure numerical value, control circuit board 403 can start siren 406, can light after siren 406 starts, make whether user's accessible siren 406 lights and knows the inside atmospheric pressure of tire normally, thereby the person of facilitating the use detects and knows the inside atmospheric pressure of tire through valve cover 4, avoided the user can not in time externally know the condition of the inside atmospheric pressure of tire.
Preferably, the valve 3, the valve cover 4, the filter core 5, the support frame 7, the expansion spring 8 and the inflation inlet 10 together form a filter mechanism, the air pressure sensor 401 inside the valve cover 4 detects the air pressure inside the tire through the valve 3 and the valve core 2, so that when a user inflates the tire through the valve 3, the filled air drives the filter core 5 to seal the top inside the valve 3 due to the support frame 7, so that the filled air filters the air through the filter core 5 and then transmits the filtered air into the tire, when the valve 3 and the valve cover 4 are fixed, the valve cover 4 drives the push column 408 to abut against the middle of the support frame 7, and the push column 408 pushes the support frame 7 towards the inside of the valve cover 4 along with the valve 3 attaching to the valve cover 4, and pushes the support frame 7 towards the inside of the valve 3 when the push column 40 pushes, and can drive filter element 5 and expanding spring 8 when support frame 7 promotes to inside together, and when support frame 7 drove expanding spring 8 and pushed into to valve 3 inside, support frame 7 drove filter element 5 and parts the inside top of valve 3 for the inside gas of tire can directly contact through support frame 7 both sides and the inside baroceptor 401 of valve closure 4, avoided gas directly to be filtered by filter element 5 and offset partly, and lead to the inaccurate condition of baroceptor 401 atmospheric pressure result that detects out.
The working principle and the using process of the invention are as follows: firstly, when a user holds the valve cover 4 to take off the valve mouth 3, the valve cover 4 is small and not easy to take, so that the valve cover 4 falls off, a layer of anti-slip sleeve 6 is arranged outside the valve cover 4, uneven anti-slip lines are arranged on the surface of the anti-slip sleeve 6, the friction force between the valve cover 4 and the hand of the user is increased, and the situation that the valve cover is small and not easy to take off when the user uses the valve cover is avoided;
then, when a user connects the valve cover 4 with the valve nozzle 3, the user holds the valve cover 4 to drive the connecting port 409 and the valve nozzle 3 to be aligned, and after the internal thread of the connecting port 409 and the external thread of the valve nozzle 3 are mutually attached, the user can lap-joint and fix the connecting port 409 and the valve nozzle 3 only through threaded connection, and after the connecting port 409 and the valve nozzle 3 are connected, the valve cover 4 and the valve nozzle 3 achieve the connecting effect, and because the threaded connection is a common fixing mode, the user can conveniently and quickly connect the valve cover 4 and the valve nozzle 3;
then, after the valve cover 4 and the valve mouth 3 are fixed, the rubber inner ring 407 inside the valve cover 4 and the rubber outer ring 9 inside the valve mouth 3 are jointed, and because the rubber inner ring 407 and the rubber outer ring 9 are both in a ring shape, when the valve cover 4 drives the rubber inner ring 407 to extrude towards the inside of the rubber outer ring 9, the joint between the valve cover 4 and the valve mouth 3 is better sealed due to better jointing between the rubber inner ring 407 and the rubber outer ring 9, and the condition that air leakage occurs at the joint between the valve cover 4 and the valve mouth 3 is avoided;
next, the air pressure sensor 401 in the valve cover 4 detects the air pressure in the tire through the valve 3 and the valve core 2, so when a user inflates the tire through the valve 3, the filter core 5 is driven by the support frame 7 to seal the top of the valve 3, the air is filtered through the filter core 5, the filtered air is transmitted to the tire, when the valve 3 and the valve cover 4 are fixed, the valve cover 4 drives the pushing column 408 to push the middle of the support frame 7, the pushing column 408 pushes the valve cover 4 along with the valve 3, the support frame 7 pushes the valve 40, the filter core 5 and the expansion spring 8 push the inside together, when the support frame 7 drives the telescopic spring 8 to push into the inflating valve 3, the support frame 7 drives the filter element 5 to separate the top of the inside of the inflating valve 3, so that the gas in the tire can be directly contacted with the air pressure sensor 401 in the air valve cover 4 through two sides of the support frame 7, and the condition that the gas is directly filtered by the filter element 5 to offset a part of the gas, so that the air pressure result detected by the air pressure sensor 401 is inaccurate is avoided;
finally, after the connection between the valve cover 4 and the valve mouth 3, the air inlets 402 at both sides of the top of the pushing column 408 will introduce the tire gas transmitted from the valve mouth 3 to the air pressure sensor 401, and the air pressure sensor 401 will detect the air pressure of the introduced gas and transmit the detected air pressure effect to the control circuit board 403, wherein the control circuit board 403 is internally provided with a value related to the normal air pressure, so when the air pressure sensor 401 transmits the data after the air pressure detection to the control circuit board 403, the control circuit board 403 will compare the air pressure test value with the air pressure setting value, when the air pressure test value (the air pressure sensor 401) and the air pressure setting value (the control circuit board 403) are equal to each other, the air pressure sensor 401 and the control circuit board 403 will continue to detect and compare, and when the air pressure test value and the air pressure setting value are not equal to each other, the control circuit board 403 will start the alarm 406, and the alarm 406 will be lighted after being started, so that the user can know whether the internal air pressure of the tire is normal by whether the alarm 406 is lighted, and the user can conveniently detect and know the internal air pressure of the tire through the valve cover 4, thereby avoiding the situation that the user cannot timely know the internal air pressure of the tire from the outside, which is the working principle of the built-in tire pressure detecting device.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.
Claims (7)
1. The utility model provides a built-in tire pressure detection device, includes detection device main part (1), valve inside (2), inflating valve (3) and valve closure (4), its characterized in that: the top of the detection device body (1) is fixedly connected with a valve core (2), the bottom of the valve core (2) is fixedly connected with a valve (3), the bottom end of the valve (3) is movably connected with a valve cover (4), the inner bottom of the valve cover (4) is fixedly connected with an alarm (406), an air pressure sensor (401) is fixedly connected with the middle of the inner part of the valve cover (4), the top of the alarm (406) is fixedly connected with a push column (408), air inlets (402) are connected to two sides of the top of the push column (408) in a penetrating manner, a control circuit board (403) is fixedly connected to one side of the inner part of the valve cover (4), a storage battery (404) is fixedly connected to the other side of the inner part of the valve cover (4), a magnet charging port (405) is fixedly connected to the other side of the storage battery (404), and a filter core (5) is movably, the bottom embedding of inflating valve (3) is connected with inflation inlet (10), the centre swing joint of inflation inlet (10) has support frame (7), one side bottom fixedly connected with expanding spring (8) of support frame (7).
2. The built-in tire pressure detecting device according to claim 1, wherein: the bottom of the interior of the inflation inlet (10) is fixedly connected with a rubber outer ring (9).
3. The built-in tire pressure detecting device according to claim 2, wherein: the periphery of the valve cover (4) is fixedly connected with an anti-slip sleeve (6).
4. The built-in tire pressure detecting device according to claim 3, wherein: two sides of the bottom of the pushing column (408) are fixedly connected with rubber inner rings (407).
5. The built-in tire pressure detecting device according to claim 4, wherein: the middle of the top of the valve cover (4) is embedded and connected with a connecting port (409).
6. The built-in tire pressure detecting device according to claim 5, wherein: the valve cover (4) is composed of an alarm (406) at the bottom inside the valve cover (4), an air pressure sensor (401) in the middle inside the valve cover (4), a pushing column (408) at the top of the alarm (406), air inlets (402) on two sides of the top of the pushing column (408) and a control circuit board (403) on one side inside the valve cover (4).
7. The built-in tire pressure detecting device according to claim 6, wherein: the filtering mechanism is composed of an inflating valve (3), an inflating valve cover (4), a filter element (5), a supporting frame (7), a telescopic spring (8) and an inflating opening (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911419103.0A CN111038186A (en) | 2019-12-31 | 2019-12-31 | Built-in tire pressure detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911419103.0A CN111038186A (en) | 2019-12-31 | 2019-12-31 | Built-in tire pressure detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111038186A true CN111038186A (en) | 2020-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911419103.0A Pending CN111038186A (en) | 2019-12-31 | 2019-12-31 | Built-in tire pressure detection device |
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| CN (1) | CN111038186A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112046215A (en) * | 2020-09-30 | 2020-12-08 | 江阴市创新气门嘴有限公司 | TPMS inflating valve convenient to install |
| CN113465815A (en) * | 2021-07-08 | 2021-10-01 | 吕晓红 | Digital display type air pressure equipment |
-
2019
- 2019-12-31 CN CN201911419103.0A patent/CN111038186A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112046215A (en) * | 2020-09-30 | 2020-12-08 | 江阴市创新气门嘴有限公司 | TPMS inflating valve convenient to install |
| CN113465815A (en) * | 2021-07-08 | 2021-10-01 | 吕晓红 | Digital display type air pressure equipment |
| CN113465815B (en) * | 2021-07-08 | 2023-06-16 | 武汉燃气热力能源服务有限公司 | Digital display type pneumatic equipment |
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