CN114251509A - Water drain valve for intercooler and using method thereof - Google Patents
Water drain valve for intercooler and using method thereof Download PDFInfo
- Publication number
- CN114251509A CN114251509A CN202111420156.1A CN202111420156A CN114251509A CN 114251509 A CN114251509 A CN 114251509A CN 202111420156 A CN202111420156 A CN 202111420156A CN 114251509 A CN114251509 A CN 114251509A
- Authority
- CN
- China
- Prior art keywords
- valve body
- intercooler
- temperature
- valve
- water drain
- 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.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 30
- 239000002184 metal Substances 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 14
- 230000009123 feedback regulation Effects 0.000 claims description 2
- 238000009825 accumulation Methods 0.000 abstract description 4
- 239000012535 impurity Substances 0.000 description 10
- 238000009434 installation Methods 0.000 description 6
- 230000000670 limiting effect Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
- F16K37/0041—Electrical or magnetic means for measuring valve parameters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
- B01D35/04—Plug, tap, or cock filters filtering elements mounted in or on a faucet
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0209—Check valves or pivoted valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K49/00—Means in or on valves for heating or cooling
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Temperature-Responsive Valves (AREA)
Abstract
The invention relates to the technical field of an intercooler system of a commercial truck, and discloses a drain valve for an intercooler, which comprises a valve body, wherein an accommodating cavity is arranged inside the valve body, a vertical guide pipe is arranged at the lower part of the valve body, the upper end of the guide pipe is communicated with the accommodating cavity, the lower end of the guide pipe is provided with an opening, the lower part of the valve body is provided with a heating gasket, a temperature sensing pin is arranged on the valve body, the sensing end of the temperature sensing pin extends into the accommodating cavity, and the heating gasket and the temperature sensing pin are both connected with a vehicle control unit. The invention also discloses a use method of the water drain valve for the intercooler. The water drain valve for the intercooler and the use method thereof effectively solve the problem of water accumulation of the intercooler in the low-temperature environment.
Description
Technical Field
The invention relates to the technical field of an intercooler system of a commercial truck, in particular to a drain valve for an intercooler and a using method thereof.
Background
The conventional intercooler carried by the commercial diesel engine vehicle is generally only provided with a normally closed water drain valve or an automatic water drain valve opened by spring pressure control.
Closed valve that drains through the dismantlement, and this kind of mode can not be timely with ponding discharge, can lead to the water to pile up in several cooling tubes of downside after too much, influences heat transfer performance. In severe cases, in areas with lower temperatures, the rising and falling of the temperature are continuously carried out, so that the rising of the air inlet temperature of the engine is caused, the service life of the engine is shortened, and the dynamic property of the automobile is influenced.
At present, most automatic water drain valves of intercoolers on the market are controlled by springs, the pressure for opening the automatic water drain valves has high requirements, and the water flow speed cannot reach a relatively ideal numerical value. In addition, the spring pressure can not be regulated and controlled, and the opening pressure of each type of automobile can not reach a fixed value. In cold weather, the drain valve is directly frozen and cannot drain water.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a water drain valve for an intercooler and a using method thereof, which effectively solve the problem of water accumulation of the intercooler in a low-temperature environment.
In order to achieve the purpose, the water drain valve for the intercooler comprises a valve body, wherein an accommodating cavity is arranged inside the valve body, a vertical flow guide pipe is arranged at the lower part of the valve body, the size of the pore diameter is designed to ensure that the characteristics of an engine of an automobile are not influenced by the water drain valve, the upper end of the flow guide pipe is communicated with the accommodating cavity, the lower end of the flow guide pipe is provided with an opening, the lower part of the valve body is provided with a heating gasket, the valve body is provided with a temperature sensing pin, the sensing end of the temperature sensing pin extends into the accommodating cavity, and the heating gasket and the temperature sensing pin are both connected with a vehicle control unit.
Preferably, the outside of valve body is equipped with helicitic texture, conveniently is connected with the intercooler.
Preferably, the outside of the valve body is sleeved with a sealing rubber ring, and the outside of the valve body is provided with a groove for accommodating the sealing rubber ring, so that on one hand, sealing between the valve body and an intercooler is ensured, and on the other hand, a certain limiting effect is realized on the installation of the water drain valve.
Preferably, the valve body comprises an upper end part and a lower end part, the outer diameter of the upper end part is smaller than that of the lower end part, a thread structure is arranged outside the upper end part of the valve body, a groove is arranged at the joint of the upper end part and the lower end part, and a sealing rubber ring is arranged in the groove.
Preferably, the top of valve body is equipped with the metal filter screen, reduces large-scale impurity and gets into, the metal filter screen cover is in on the holding chamber, the metal filter screen passes through the retainer plate and installs on the valve body.
Preferably, the top of the valve body is provided with a step for installing the metal filter screen and the fixing ring.
Preferably, the inner diameter of the accommodating cavity is gradually reduced along the downward direction, and the change part of the inner diameter is an arc surface, so that the smoothness of water flow is ensured.
Preferably, the lower part of the valve body is further provided with a fixing sheet for supporting and fixing the heating gasket, so that the heating gasket is convenient to mount and fix.
Preferably, the lower end of the valve body is connected with a water discharge pipe, the water discharge pipe is communicated with the flow guide pipe, and the water discharge pipe is of a Tesla valve structure, so that on one hand, the speed of water flow can be increased, and on the other hand, impurities and condensed water at the bottom of the water discharge pipe can be prevented from flowing backwards into the valve body.
After a vehicle is powered on, the temperature sensing pin detects the temperature inside the valve body, when the temperature inside the valve body is detected to be lower than the lowest preset temperature, the heating gasket starts to work, the temperature sensing pin monitors the temperature inside the valve body, when the temperature is higher than the highest preset temperature, the heating gasket stops working, the temperature sensing pin continuously monitors the temperature inside the valve body, and the steps are repeated to perform feedback regulation.
Compared with the prior art, the invention has the following advantages:
1. the problem of water accumulation of the intercooler in a low-temperature environment is effectively solved, and expansion of the radiating pipe at the bottommost part of the intercooler caused by temperature change is eliminated, so that the service life of the intercooler is prolonged;
2. through the flow guide structure of the cambered surface and the Tesla valve structure, on one hand, water flow can be accelerated, and on the other hand, the phenomenon of suck-back of external impurities and condensed water can be prevented;
3. through the metal filter screen, the entering of large-scale impurities is reduced.
Drawings
FIG. 1 is a schematic view showing a structure of a drain valve for an intercooler of the present invention.
The components in the figures are numbered as follows:
the water drain valve comprises a valve body 1, an accommodating cavity 2, a flow guide pipe 3, a heating gasket 4, a temperature sensing pin 5, a sealing rubber ring 6, a groove 7, a metal filter screen 8, a fixing ring 9, a step 10, a fixing piece 11 and a water drain pipe 12.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments.
Example 1
As shown in figure 1, the drain valve for the intercooler comprises a valve body 1, wherein an accommodating cavity 2 is arranged inside the valve body 1, a vertical flow guide pipe 3 is arranged at the lower part of the valve body 1, the upper end of the flow guide pipe 3 is communicated with the accommodating cavity 2, the lower end of the flow guide pipe 3 is provided with an opening, a heating gasket 4 is arranged at the lower part of the valve body 1, a temperature sensing pin 5 is arranged on the valve body 1, the sensing end of the temperature sensing pin 5 extends into the accommodating cavity 2, and the heating gasket 4 and the temperature sensing pin 5 are both connected with a vehicle control unit.
In addition, the outside of valve body 1 is equipped with the helicitic texture, conveniently is connected with the intercooler, and sealing rubber circle 6 has been put to the outside cover of valve body 1, and the outside of valve body 1 is equipped with the recess 7 of holding sealing rubber circle 6, guarantees on the one hand and the intercooler between sealed, has certain limiting displacement to the installation of the valve that drains on the one hand.
When this embodiment uses, the vehicle circular telegram back, temperature-sensing round pin 5 detects the inside temperature of valve body 1, when detecting that the temperature in the valve body 1 is less than minimum preset temperature, in this embodiment, minimum preset temperature is 4 ℃, heating gasket 4 starts work, temperature-sensing round pin 5 control valve body 1 inside temperature this moment, when the temperature is greater than the maximum preset temperature, in this embodiment, the maximum preset temperature is 10 ℃, heating gasket 4 stops work, temperature-sensing round pin 5 continuously monitors the inside temperature of valve body 1, repeat above-mentioned step, carry out feedback adjustment.
Example 2
As shown in figure 1, the drain valve for the intercooler comprises a valve body 1, wherein an accommodating cavity 2 is arranged inside the valve body 1, a vertical flow guide pipe 3 is arranged at the lower part of the valve body 1, the upper end of the flow guide pipe 3 is communicated with the accommodating cavity 2, the lower end of the flow guide pipe 3 is provided with an opening, a heating gasket 4 is arranged at the lower part of the valve body 1, a temperature sensing pin 5 is arranged on the valve body 1, the sensing end of the temperature sensing pin 5 extends into the accommodating cavity 2, and the heating gasket 4 and the temperature sensing pin 5 are both connected with a vehicle control unit.
In addition, the outside of valve body 1 is equipped with the helicitic texture, conveniently is connected with the intercooler, and sealing rubber circle 6 has been put to the outside cover of valve body 1, and the outside of valve body 1 is equipped with the recess 7 of holding sealing rubber circle 6, guarantees on the one hand and the intercooler between sealed, has certain limiting displacement to the installation of the valve that drains on the one hand.
Simultaneously, the top of valve body 1 is equipped with metal filter screen 8, reduces large-scale impurity and gets into, and metal filter screen 8 covers on holding chamber 2, and metal filter screen 8 passes through retainer plate 9 to be installed on valve body 1, and 1 top of valve body is equipped with the step 10 that is used for installing metal filter screen 8 and retainer plate 9, and the lower part of valve body 1 still is equipped with the stationary blade 11 that supports fixed heating gasket 4, makes things convenient for the installation and the fixing of heating gasket 4.
In this embodiment, the inner diameter of the accommodating cavity 2 is gradually reduced along the downward direction, and the change of the inner diameter is a cambered surface, so as to ensure the smoothness of water flow, the lower end of the valve body 1 is connected with a water discharge pipe 12, the water discharge pipe 12 is communicated with the flow guide pipe 3, and the water discharge pipe 12 is of a tesla valve structure, so that the water flow speed can be increased, and impurities and condensed water at the bottom of the water discharge pipe 12 can be prevented from flowing backwards into the valve body 1.
When this embodiment uses, the vehicle circular telegram back, temperature-sensing round pin 5 detects the inside temperature of valve body 1, when detecting that the temperature in the valve body 1 is less than minimum preset temperature, in this embodiment, minimum preset temperature is 3 ℃, heating gasket 4 starts work, temperature-sensing round pin 5 control valve body 1 inside temperature this moment, when the temperature is greater than the maximum preset temperature, in this embodiment, the maximum preset temperature is 12 ℃, heating gasket 4 stops work, temperature-sensing round pin 5 continuously monitors the inside temperature of valve body 1, repeat above-mentioned step, carry out feedback adjustment.
Example 3
As shown in figure 1, the drain valve for the intercooler comprises a valve body 1, wherein an accommodating cavity 2 is arranged inside the valve body 1, a vertical flow guide pipe 3 is arranged at the lower part of the valve body 1, the upper end of the flow guide pipe 3 is communicated with the accommodating cavity 2, the lower end of the flow guide pipe 3 is provided with an opening, a heating gasket 4 is arranged at the lower part of the valve body 1, a temperature sensing pin 5 is arranged on the valve body 1, the sensing end of the temperature sensing pin 5 extends into the accommodating cavity 2, and the heating gasket 4 and the temperature sensing pin 5 are both connected with a vehicle control unit.
In addition, the valve body 1 comprises an upper end portion and a lower end portion, the outer diameter of the upper end portion is smaller than that of the lower end portion, a thread structure is arranged outside the upper end portion of the valve body 1 and is convenient to connect with an intercooler, a groove 7 is formed in the joint of the upper end portion and the lower end portion, a sealing rubber ring 6 is sleeved in the groove 7, on one hand, sealing between the valve body and the intercooler is guaranteed, and on the other hand, a certain limiting effect is achieved on installation of a water drain valve.
Simultaneously, the top of valve body 1 is equipped with metal filter screen 8, reduces large-scale impurity and gets into, and metal filter screen 8 covers on holding chamber 2, and metal filter screen 8 passes through retainer plate 9 to be installed on valve body 1, and 1 top of valve body is equipped with the step 10 that is used for installing metal filter screen 8 and retainer plate 9, and the lower part of valve body 1 still is equipped with the stationary blade 11 that supports fixed heating gasket 4, makes things convenient for the installation and the fixing of heating gasket 4.
In this embodiment, the inner diameter of the accommodating cavity 2 is gradually reduced along the downward direction, and the change of the inner diameter is a cambered surface, so as to ensure the smoothness of water flow, the lower end of the valve body 1 is connected with a water discharge pipe 12, the water discharge pipe 12 is communicated with the flow guide pipe 3, and the water discharge pipe 12 is of a tesla valve structure, so that the water flow speed can be increased, and impurities and condensed water at the bottom of the water discharge pipe 12 can be prevented from flowing backwards into the valve body 1.
When this embodiment uses, the vehicle circular telegram back, temperature-sensing round pin 5 detects the inside temperature of valve body 1, when detecting that the temperature in the valve body 1 is less than minimum preset temperature, in this embodiment, minimum preset temperature is 5 ℃, heating gasket 4 starts work, temperature-sensing round pin 5 control valve body 1 inside temperature this moment, when the temperature is greater than the maximum preset temperature, in this embodiment, the maximum preset temperature is 10 ℃, heating gasket 4 stops work, temperature-sensing round pin 5 continuously monitors the inside temperature of valve body 1, repeat above-mentioned step, carry out feedback adjustment.
According to the water drain valve for the intercooler and the use method of the water drain valve, the problem of water accumulation of the intercooler in a low-temperature environment is effectively solved, expansion of the radiating pipe at the bottommost part of the intercooler caused by temperature change is eliminated, the service life of the intercooler is prolonged, water flow can be accelerated on one hand, and suck-back of external impurities and condensed water can be prevented on the other hand through the flow guide structure with the cambered surface and the Tesla valve structure; the metal filter screen 8 reduces the entrance of large impurities.
Claims (10)
1. The utility model provides an intercooler is with valve that drains, includes valve body (1), its characterized in that: the inside holding chamber (2) that is equipped with of valve body (1), the lower part of valve body (1) is equipped with vertical honeycomb duct (3), honeycomb duct (3) upper end with holding chamber (2) intercommunication, honeycomb duct (3) lower extreme opening, the lower part of valve body (1) is equipped with heating gasket (4), be equipped with temperature-sensing round pin (5) on valve body (1), the response end of temperature-sensing round pin (5) stretches into in holding chamber (2), heating gasket (4) and temperature-sensing round pin (5) all are connected with whole car the control unit.
2. The water drain valve for an intercooler as claimed in claim 1, wherein: the outside of the valve body (1) is provided with a thread structure.
3. The water drain valve for an intercooler as claimed in claim 1, wherein: the sealing rubber ring (6) is sleeved outside the valve body (1), and a groove (7) for accommodating the sealing rubber ring (6) is formed in the outside of the valve body (1).
4. The water drain valve for an intercooler as claimed in claim 1, wherein: the valve body (1) comprises an upper end portion and a lower end portion, the outer diameter of the upper end portion is smaller than that of the lower end portion, a thread structure is arranged outside the upper end portion of the valve body (1), a groove (7) is formed in the joint of the upper end portion and the lower end portion, and a sealing rubber ring (6) is arranged in the groove (7).
5. The water drain valve for an intercooler as claimed in claim 1, wherein: the top of valve body (1) is equipped with metal filter screen (8), metal filter screen (8) cover be in on holding chamber (2), install through retainer plate (9) metal filter screen (8) on valve body (1).
6. The water drain valve for an intercooler as claimed in claim 5, wherein: the top of the valve body (1) is provided with a step (10) for installing the metal filter screen (8) and the fixing ring (9).
7. The water drain valve for an intercooler as claimed in claim 1, wherein: the inner diameter of the accommodating cavity (2) is gradually reduced along the downward direction, and the change part of the inner diameter is an arc surface.
8. The water drain valve for an intercooler as claimed in claim 1, wherein: the lower part of the valve body (1) is also provided with a fixing sheet (11) for supporting and fixing the heating gasket (4).
9. The water drain valve for an intercooler as claimed in claim 1, wherein: the lower end of the valve body (1) is connected with a water discharge pipe (12), the water discharge pipe (12) is communicated with the flow guide pipe (3), and the water discharge pipe (12) is of a Tesla valve structure.
10. A use method of the water drain valve for the intercooler as claimed in any one of claims 1 to 9, wherein: after the vehicle circular telegram, temperature-sensing round pin (5) detect valve body (1) inside temperature, when detecting when the temperature in valve body (1) is less than minimum preset temperature, heating gasket (4) start-up work, this moment temperature-sensing round pin (5) control the inside temperature of valve body (1), when the temperature is greater than the highest preset temperature, heating gasket (4) stop work, temperature-sensing round pin (5) continuously monitor the inside temperature of valve body (1), repeat above-mentioned step, carry out the feedback regulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111420156.1A CN114251509A (en) | 2021-11-26 | 2021-11-26 | Water drain valve for intercooler and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111420156.1A CN114251509A (en) | 2021-11-26 | 2021-11-26 | Water drain valve for intercooler and using method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114251509A true CN114251509A (en) | 2022-03-29 |
Family
ID=80793331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111420156.1A Pending CN114251509A (en) | 2021-11-26 | 2021-11-26 | Water drain valve for intercooler and using method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114251509A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060141298A1 (en) * | 2004-11-30 | 2006-06-29 | Keihin Corporation | Solenoid-operated valve for fuel cells |
| CN104712416A (en) * | 2013-12-12 | 2015-06-17 | 福特环球技术公司 | Shuttle valve assembly and method for intercooler condensation removal |
| CN105736825A (en) * | 2016-04-24 | 2016-07-06 | 武海强 | Ice driven anti-freezing control device |
| CN208840696U (en) * | 2018-09-20 | 2019-05-10 | 北京安达维尔航空设备有限公司 | Water nozzle diffusion welding (DW) heating structure |
| CN112228589A (en) * | 2020-11-09 | 2021-01-15 | 瑞立集团瑞安汽车零部件有限公司 | Valve structure and solenoid valve device |
| CN112361069A (en) * | 2020-10-09 | 2021-02-12 | 杨开村 | Device for eliminating water hammer effect of water pipe start and stop |
| CN212616434U (en) * | 2020-06-30 | 2021-02-26 | 潍柴重机股份有限公司 | Regulating valve and engine using same |
-
2021
- 2021-11-26 CN CN202111420156.1A patent/CN114251509A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060141298A1 (en) * | 2004-11-30 | 2006-06-29 | Keihin Corporation | Solenoid-operated valve for fuel cells |
| CN104712416A (en) * | 2013-12-12 | 2015-06-17 | 福特环球技术公司 | Shuttle valve assembly and method for intercooler condensation removal |
| CN105736825A (en) * | 2016-04-24 | 2016-07-06 | 武海强 | Ice driven anti-freezing control device |
| CN208840696U (en) * | 2018-09-20 | 2019-05-10 | 北京安达维尔航空设备有限公司 | Water nozzle diffusion welding (DW) heating structure |
| CN212616434U (en) * | 2020-06-30 | 2021-02-26 | 潍柴重机股份有限公司 | Regulating valve and engine using same |
| CN112361069A (en) * | 2020-10-09 | 2021-02-12 | 杨开村 | Device for eliminating water hammer effect of water pipe start and stop |
| CN112228589A (en) * | 2020-11-09 | 2021-01-15 | 瑞立集团瑞安汽车零部件有限公司 | Valve structure and solenoid valve device |
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