CN211550639U - One-way valve of air compressor - Google Patents
One-way valve of air compressor Download PDFInfo
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- CN211550639U CN211550639U CN201922259846.8U CN201922259846U CN211550639U CN 211550639 U CN211550639 U CN 211550639U CN 201922259846 U CN201922259846 U CN 201922259846U CN 211550639 U CN211550639 U CN 211550639U
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Abstract
The utility model discloses an air compressor machine check valve, including valve body and valve gap, seted up the case chamber in the valve body, case and spring are installed to the case intracavity, and valve body rear end downside is provided with the joint of giving vent to anger, and case chamber front end is provided with air inlet joint, and air inlet joint all communicates with the case chamber with the inner chamber that the joint of giving vent to anger, and the air inlet joint axis is slope upward, and the air inlet joint outer end is higher than inner. This air compressor machine check valve can reduce the degree of buckling of connecting the pipeline between air feed joint and the air inlet joint, and the pressure loss is littleer when compressed gas flows in the pipeline, and it is more smooth and easy to flow.
Description
Technical Field
The utility model relates to an air compressor machine accessory technical field, in particular to air compressor machine check valve.
Background
Most of existing air compressors are shown in fig. 1, and generally include an air storage tank 21 and a machine head 22 mounted above the air storage tank 21, an air inlet 23 is opened laterally above the air storage tank 21, a check valve 24 is mounted on the air inlet 23, an air supply connector 20 is mounted on the machine head 22, and the air supply connector 20 is connected with an air supply connector 7 of the check valve 24 through a pipeline 19.
The air inlet connector 7 is arranged on the left side and the right side of the one-way valve 24, the air outlet connector 6 is arranged below the rear side of the one-way valve 24, and the axes of the air inlet connector 7 and the air outlet connector 6 are perpendicular to the axis of the valve core cavity. And the axial directions of the air outlet joint 6 and the air inlet joint 7 are also vertical. During installation, the air outlet joint 6 is connected with an air inlet 23 on the air storage tank 21, the two air inlet joints 7 face to the front end and the rear end of the axis direction of the air storage tank 21 respectively, and the two air inlet joints 7 are connected with an air supply joint 20 on the machine head 22 through pipelines 19 respectively. The air supply connector 20 is generally L-shaped with one end connected to the head 22 and the other end facing vertically downward.
When the pipe connection air feed connects and the air inlet joint, because the air feed connects the vertical downwards of tip, the air inlet joint level sets up, need pass through the right angle and buckle during the pipe connection for the pressure loss increase when the air current flows influences the smooth and easy nature that compressed air flows. Meanwhile, after the pipeline is bent at a right angle, the overall length of the pipeline is increased, and the pipeline cost is increased. In addition, the axis of the air inlet joint is perpendicular to the axis of the valve core cavity, when compressed air enters the valve core cavity from the air inlet joint, turning needs to occur, and at the turning position, the flow of the compressed air is also blocked, so that certain pressure loss is generated, and the smoothness of the flow of the compressed air is influenced.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide an air compressor machine check valve can reduce the degree of buckling of connecting the pipeline between air feed joint and the air inlet connection, and the pressure loss is littleer when compressed gas flows in the pipeline, and it is more smooth and easy to flow.
The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides an air compressor machine check valve, includes valve body and valve gap, has seted up the case chamber in the valve body, and case and spring are installed to the case intracavity, and valve body rear end downside is provided with the joint of giving vent to anger, and case chamber front end is provided with the air inlet connector, and the inner chamber that air inlet connector and the joint of giving vent to anger all communicates with the case chamber, and the air inlet connector axis is the slope upwards, and the air inlet connector outer end is higher than inner.
Through above-mentioned technical scheme, can reduce the angle of buckling and the whole length of pipeline. The aircraft nose is generally installed directly over the gas holder, the aircraft nose side in the check valve top is installed to the air feed joint, the air feed joint tilt up, the outer end is higher than inner, make air feed joint tip can be partial to the air feed joint, make the contained angle between interface and the air feed joint outer end on the air feed joint reduce, when making the connecting tube, the angle of buckling of pipeline diminishes, can reduce the air current because the pressure loss that the pipeline buckled and produced when flowing in the pipeline, reduce the whole length of pipeline simultaneously.
Preferably, the air inlet joint axis is inclined towards the front side of the valve core cavity at the same time.
Through above-mentioned technical scheme, can further reduce the degree of buckling of pipeline. The general check valve is installed on the air storage tank outside the machine head, a certain distance is still reserved between the longitudinal plane of the air inlet joint in the axis direction of the air storage tank and the longitudinal plane of the air supply joint in the axis direction of the air storage tank, the axis of the air inlet joint inclines towards the front side of the valve core cavity while inclining upwards, the end part of the air inlet joint deviates towards the machine head direction after the check valve is installed, therefore, the connection of pipelines is facilitated, and the bending degree and the length of the pipelines are reduced.
In addition, the air inlet connector inclines to upside and aircraft nose direction simultaneously like this and sets up for the bending degree between air inlet connector inner chamber and the case chamber reduces, makes the contained angle of the interior runner of valve body become the obtuse angle from the right angle, and the air after the convenient compression flows into the case intracavity from air inlet connector's inner chamber.
Preferably, the number of the air inlet joints is two, and the air inlet joints are symmetrically arranged on two sides of the valve body.
Through above-mentioned technical scheme, this check valve can connect with two air feed connectors simultaneously. In general, the number of cylinders in one machine head is even, so that when one part of cylinders sucks air, the other part of cylinders compresses the sucked air, the power of the motor is fully utilized, and the load of the motor cannot be changed excessively in the working process. The number of the air inlet joints is two, and the air inlet joints can be connected with the two air supply joints simultaneously so as to reduce the number of the check valves and the overall cost of the air compressor.
Preferably, the front end of the valve body is provided with an air leakage joint, an air leakage interface is arranged on the air leakage joint, and the air leakage interface is communicated with an inner cavity of the air inlet joint.
Through above-mentioned technical scheme, the solenoid valve can the direct mount on the joint that loses heart to carry out the pressure release through the solenoid valve to pipeline and aircraft nose when needing, with wherein high-pressure gas discharge. In the use process of the air compressor, the motor works intermittently, so that the air pressure in the air storage tank is kept within a range. When the air pressure in the air storage tank is lower than the lower limit air pressure, the motor starts to rotate from a static state to inflate the air storage tank, and when the air pressure in the air storage tank is higher than the upper limit air pressure, the motor stops working from a working state. When the motor starts to rotate from a static state, the load of the motor is the largest, and if the handpiece and the pipeline have higher back pressure at the moment, the load of the motor during starting can be further increased. Therefore, in order to reduce the load at the time of starting the motor, it is necessary to discharge the high-pressure gas remaining in the pipe and the head. The arrangement of the air leakage joint can conveniently install the electromagnetic valve at the position, so that the pressure is relieved. The air leakage joint can also be directly connected with a pressure switch on the air compressor through a pipeline, and air leakage is carried out through the pressure switch on the air compressor. In the actual use process, when the air pressure in the air storage tank reaches the set upper limit pressure, the pressure switch is tripped, the motor stops working, and meanwhile, the pipeline connected with the pressure switch is communicated with the outside through the pressure switch, so that the pressure relief effect is achieved.
Preferably, the axis of the air leakage interface is perpendicular to the axis of the valve core cavity.
Through the technical scheme, the air leakage interface axis is perpendicular to the axis of the valve core cavity, so that the electromagnetic valve can be conveniently installed. Generally, the electromagnetic valve comprises a valve core assembly, wherein an electromagnetic coil is sleeved on the outer side of the valve core assembly, and a nut is installed at the upper end of the valve core assembly to fix the electromagnetic coil on the valve core assembly. The perpendicular case chamber axis of interface that loses heart sets up, and when the case subassembly was installed in the interface that loses heart, case subassembly upper end slope was towards the gas holder outside, roughly parallel with the tangential direction of motor to can not take place to interfere with between the electrode surface when making the case subassembly installation. Meanwhile, the valve core assembly inclines towards the upper part of the outer side of the air storage tank, so that the electromagnetic coil mounting structure has a large mounting space and is convenient for mounting and dismounting the coil.
Preferably, a sliding cavity is arranged in the valve cover, the rear end of the valve core is arranged in the sliding cavity, and the spring is arranged in the sliding cavity.
Through above-mentioned technical scheme, the setting of slip chamber can restrict the position of case, leads to the slip direction of case simultaneously for the case can be accurate contradict with the sealing flange, and the cooperation is sealed.
Preferably, the outer diameter of the valve core is smaller than the inner diameter of the sliding cavity, and the outer side surface of the rear end of the valve core is circumferentially provided with a convex edge.
Through the technical scheme, the outer diameter of the valve core is smaller than the inner diameter of the valve core cavity, so that a flow channel for air circulation is formed between the outer side surface of the valve core and the inner wall of the valve core cavity, and compressed air entering the air inlet joint can enter the air outlet joint through the flow channel. The outer diameter of the valve core is smaller than the inner diameter of the sliding cavity, and the outer side surface of the rear end is provided with a convex edge which is abutted against the surface of the sliding cavity, so that the valve core can slide along the axis of the sliding cavity. After the convex edges are arranged, gaps are reserved between the outer peripheral surface of the rear end of the valve core and the surface of the sliding cavity, so that the air is not held in the sliding cavity when the valve core slides, the normal sliding of the valve core in the sliding cavity is not influenced, the one-way valve is convenient to flexibly open and close, and the resistance when compressed air flows is reduced.
Preferably, the valve body is made of aluminum.
Through the technical scheme, the cost of the check valve can be further reduced. The existing valve body is generally made of copper, and the material cost is high. Meanwhile, the melting point of copper is high, the valve body is machined by using copper as a raw material in a casting or red punching mode, the machining cost is high, and the machining efficiency is low. And the valve body is processed by using aluminum as a material, so that the material cost is low, and meanwhile, the valve body can be processed by using a die-casting method, so that the processing cost is low. Meanwhile, when the air compressor works, the general pressure is between 06 MPa and 0.8MPa, the air compressor can be completely supported by using aluminum materials, and the air compressor is more convenient to process.
Preferably, a sealing flange is arranged in the valve core cavity, the surface of the sealing convex ring is arc-shaped, and the front end of the valve core is conical.
Through the technical scheme, the sealing performance of the one-way valve can be improved. When the valve core is pressed on the sealing flange in a low pressure mode, the contact area between the valve core and the sealing flange is smaller, and the valve core can be better pressed on the sealing flange. Meanwhile, a sealing flange is independently processed, so that the processing cost is lower and the processing is more convenient compared with the processing of a complete sealing surface.
The surface of the sealing convex ring is arc-shaped, and the front end of the valve core is conical, so that the front end of the valve core can be self-positioned with the sealing flange, and reliable sealing is realized.
Preferably, the included angle between the projection of the axis of the air inlet joint on the longitudinal plane parallel to the axis of the valve core cavity and a vertical line is alpha, the alpha is 20-40 degrees, the included angle between the projection of the axis of the air inlet joint on the longitudinal plane vertical to the axis of the valve core cavity and a horizontal line is beta, and the beta is 15-35 degrees.
Through above-mentioned technical scheme, the whole proportion of air inlet joint axis and gas holder and aircraft nose suits, can face the air outlet joint on the aircraft nose betterly, is convenient for the connection of pipeline.
Compared with the prior art, the beneficial effects of the utility model are that: through the orientation that changes air inlet joint for when air inlet joint and the air feed joint on the aircraft nose are connected, the crooked degree of pipeline is littleer, and length is littleer, thereby reduces the pressure loss that produces when the air after the compression flows, reduces partly cost simultaneously.
Drawings
Fig. 1 is a schematic structural diagram of a conventional air compressor;
FIG. 2 is an exploded view of the embodiment;
FIG. 3 is a perspective view of the embodiment;
FIG. 4 is a top view of the embodiment;
FIG. 5 is a schematic cross-sectional view of FIG. 4;
FIG. 6 is a perspective view of the valve cartridge;
FIG. 7 is a perspective view of the embodiment with the solenoid valve installed;
FIG. 8 is a schematic structural view of the check valve of the embodiment when the check valve is mounted on an air compressor;
FIG. 9 is a front view of the embodiment;
fig. 10 is a right side view of fig. 9.
Reference numerals: 1. a valve body; 2. a valve cover; 3. a spool cavity; 4. a valve core; 5. a spring; 6. an air outlet joint; 7. an air inlet joint; 8. a gas release joint; 9. an air leakage interface; 10. a sealing flange; 11. a sliding cavity; 12. convex edges; 13. a first spring seat; 14. a second spring seat; 15. an electromagnetic valve; 16. a valve core assembly; 17. an electromagnet; 18. a nut; 19. a pipeline; 20. a gas supply joint; 21. a gas storage tank; 22. a machine head; 23. an air inlet; 24. a one-way valve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.
As shown in fig. 2 to 7, the one-way valve for the air compressor comprises a valve body 1, wherein the valve body 1 is made of aluminum, and the valve body 1 is integrally formed by die casting through a die casting method. A valve core cavity 3 is formed in the valve body 1, a valve core 4 and a spring 5 are installed in the valve core cavity 3, a valve cover 2 is installed at an opening of the valve core cavity 3, and the valve cover 2 is fixed at the opening of the valve core cavity 3 through threads, so that the spring 5 and the valve core 4 are always located in the valve core cavity 3. An air outlet joint 6 is integrally arranged at the lower side of the rear end of the valve body 1, and the inner cavity of the air outlet joint 6 is communicated with the valve core cavity 3. The front end of the valve core cavity 3 is provided with an air inlet joint 7, and the inner cavity of the air inlet joint 7 is communicated with the valve core cavity 3. The axis of the air inlet connector 7 is inclined upwards towards the air supply connector 20 on the nose 22, with the outer end of the air inlet connector 7 being higher than the inner end. Meanwhile, the axis of the air inlet joint 7 inclines towards the front side of the valve core cavity 3, so that after the one-way valve 24 is installed on the air storage tank 21, the air inlet joint 7 inclines towards the direction close to the machine head 22. This arrangement allows the pipe 19 to be bent at a smaller angle and the pipe 19 to be shorter in length when the pipe 19 connects the air supply connector 20 and the air intake connector 7. The pipe 19 has a smaller bending angle and a shorter length, and the pressure loss of the compressed gas flowing in the pipe 19 can be reduced. The shorter length of the conduit 19 also reduces the cost of the conduit 19.
In addition, air inlet joint 7 is in case chamber 3 front side, and air inlet joint 7 axis inclines to case chamber 3 upside the place ahead simultaneously, makes the contained angle increase between air inlet joint 7 axis and the 3 axis of case chamber, be the obtuse angle, the runner of avoiding between air inlet joint 7 and the case chamber 3 takes place the right angle cross, produce great vortex in turn department when the air after the compression flows, it is smooth-going to make the runner as far as possible, reduce the pressure loss when compressed gas flows into case chamber 3 from air inlet joint 7, it is more smooth and easy to make the air after the compression flow when entering into case chamber 3 from air inlet joint 7.
The number of the air inlet joints 7 is two, and the two air inlet joints 7 are symmetrically arranged on two sides of the valve body 1. Be provided with two air inlet joint 7 on same valve body 1 for a check valve 24 can be connected with two air feed joint 20 on the aircraft nose 22 simultaneously, thereby reduces the use quantity of check valve 24 on the air compressor machine, reduces the overall cost of air compressor machine.
The front end of the valve body 1 is further integrally provided with an air leakage joint 8, an air leakage interface 9 used for installing the electromagnetic valve 15 is arranged on the air leakage joint 8, and the air leakage interface 9 is communicated with the inner cavity of the air inlet joint 7, so that compressed air in the air inlet joint 7 can flow into the air leakage interface 9. The axis of the air release interface 9 is perpendicular to the axis of the valve core cavity 3, as shown in fig. 3, the air release interface 9 faces to the upper part of the valve body 1, so that when the electromagnetic valve 15 is installed, the electromagnetic valve 15 cannot interfere with the machine head 22, and the installation of the electromagnetic valve 15 is influenced.
In addition, when the air leakage joint is connected with a pressure switch on the air compressor through a pipeline, the axis of the air leakage interface is connected with the pressure switch
The sealing flange 10 is arranged in the valve core cavity 3, and the sealing flange 10 is annular and used for abutting against the valve core 4 to realize sealing. The surface of the sealing flange 10 is arc-shaped, the front end of the valve core 4 is conical, the self-positioning of the front end of the valve core 4 can be realized in the process of collision with the sealing flange 10, and the contact surface of the front end of the valve core 4 and the sealing flange 10 is kept consistent when collision is guaranteed.
A sliding cavity 11 is arranged in the valve cover 2, the rear end of the valve core 4 is arranged in the sliding cavity 11, and the spring 5 is arranged in the sliding cavity 11. A first spring seat 13 is arranged in the sliding cavity 11, a second spring seat 14 is arranged in the valve core 4, and the first spring seat 13 is clamped into an inner ring at the rear end of the spring 5 to position the rear end of the spring 5. The second spring seat 14 is clamped into the inner ring at the front end of the spring 5 to position the front end of the spring 5.
The outer diameter of the valve core 4 is smaller than the inner diameter of the sliding cavity 11. Protruding stupefied 12 has been evenly distributed to the circumference on the case 4 rear end lateral surface, and case 4 contradicts through protruding stupefied 12 and the 11 inner walls in slip chamber for there is certain clearance between slip chamber 11 and the 4 outer peripheral faces of case. The sliding cavity 11 can be communicated with the valve core cavity 3 through the gap, so that the problem that when the valve core 4 slides in the sliding cavity 11, compressed air in the sliding cavity 11 at the rear end of the valve core 4 cannot be discharged in time to influence the sliding of the valve core 4, and the opening or closing delay is caused is avoided. Meanwhile, the outer diameter of the valve core 4 is smaller than that of the valve core cavity 3, so that an annular air flow channel is formed between the outer peripheral surface of the valve core 4 and the inner wall of the valve core cavity 3. When the valve core 4 is pushed open by the compressed gas, the compressed gas can enter the inner cavity of the air outlet joint 6 through the air flow channel at the position.
As shown in fig. 7 and 8, the check valve 24 is installed on the air inlet 23 of the air storage tank 21, the check valve 24 is located between the two air supply connectors 20 on the machine head 22, the air supply connectors 20 are L-shaped, one end of each air supply connector 20 is connected with the machine head 22, and the other end of each air supply connector is used for being connected with the pipeline 19. The two air inlet connections 7 on the one-way valve 24 are inclined upwards and towards the head 22, towards the air supply connection 20. The pipe 19 is connected at both ends to the air supply connection 20 and the air intake connection 7, respectively. Because the air inlet joint 7 is upward and is inclined towards the direction close to the machine head 22, the bending degree of the pipeline 19 is reduced when the air supply joint 20 and the air inlet joint 7 are connected, and the length of the pipeline is shorter, so that the compressed air can flow in the pipeline 19 conveniently, and the pressure loss generated when the compressed air flows is reduced.
The solenoid valve 15 is prior art and is widely used in the industry and can be purchased directly from the market. The solenoid valve 15 includes a spool assembly 16, an electromagnet 17, and a nut 18. The valve core assembly 16 is integrally columnar and is arranged in the air leakage interface 9, and when the electromagnet 17 is not used, the air leakage interface 9 can be communicated with the outside, so that the pressure in the pipeline 19 and the machine head 22 is relieved. During installation, the valve core assembly 16 is fixed on the air release interface 9 of the air release joint 8 through the lower end thread, then the electromagnet 17 is sleeved on the valve core assembly 16, finally the nut 18 is screwed on the upper end of the valve core assembly 16, and the electromagnet 17 is locked on the valve core assembly 16, so that the installation of the electromagnetic valve 15 is realized.
The included angle between the projection of the axis of the air inlet joint 7 on the longitudinal plane parallel to the axis of the valve core cavity 3 and a vertical line is alpha, the alpha is 20-40 degrees, the included angle between the projection of the axis of the air inlet joint 7 on the longitudinal plane vertical to the axis of the valve core cavity 3 and a horizontal line is beta, and the beta is 15-35 degrees. In the present embodiment, α is 32 ° and β is 16 °.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention, which is defined by the appended claims.
Claims (10)
1. The utility model provides an air compressor machine check valve, includes valve body (1) and valve gap (2), has seted up case chamber (3) in valve body (1), installs case (4) and spring (5) in case chamber (3), and valve body (1) rear end downside is provided with air outlet connector (6), and case chamber (3) front end is provided with air inlet connector (7), and air inlet connector (7) and air outlet connector (6)'s inner chamber all communicates characterized by with case chamber (3): the axis of the air inlet joint (7) inclines upwards, and the outer end of the air inlet joint (7) is higher than the inner end.
2. The one-way valve of the air compressor as claimed in claim 1, wherein: the axis of the air inlet joint (7) is inclined towards the front side of the valve core cavity (3).
3. The check valve of the air compressor as claimed in claim 1 or 2, wherein: the number of the air inlet joints (7) is two, and the air inlet joints (7) are symmetrically arranged on two sides of the valve body (1).
4. The one-way valve of the air compressor as claimed in claim 3, wherein: the front end of the valve body (1) is provided with an air leakage joint (8), an air leakage interface (9) is arranged on the air leakage joint (8), and the air leakage interface (9) is communicated with the inner cavity of the air inlet joint (7).
5. The one-way valve of the air compressor as claimed in claim 4, wherein: the axis of the air leakage interface (9) is vertical to the axis of the valve core cavity (3).
6. The one-way valve of the air compressor as claimed in claim 1, wherein: a sliding cavity (11) is arranged in the valve cover (2), the rear end of the valve core (4) is arranged in the sliding cavity (11), and the spring (5) is arranged in the sliding cavity (11).
7. The one-way valve of the air compressor as claimed in claim 6, wherein: the outer diameter of the valve core (4) is smaller than the inner diameter of the sliding cavity (11), and the outer side surface of the rear end of the valve core (4) is circumferentially provided with a convex edge (12).
8. The one-way valve of the air compressor as claimed in claim 1, wherein: the valve body (1) is made of aluminum.
9. The one-way valve of the air compressor as claimed in claim 1, wherein: a sealing flange (10) is arranged in the valve core cavity (3), the surface of the sealing flange (10) is arc-shaped, and the front end of the valve core (4) is conical.
10. The one-way valve of the air compressor as claimed in claim 2, wherein: the included angle between the projection of the axis of the air inlet joint (7) on the longitudinal plane parallel to the axis of the valve core cavity (3) and a vertical line is alpha, the alpha is between 20 degrees and 40 degrees, the included angle between the projection of the axis of the air inlet joint (7) on the longitudinal plane vertical to the axis of the valve core cavity (3) and the horizontal line is beta, and the beta is between 15 degrees and 35 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922259846.8U CN211550639U (en) | 2019-12-16 | 2019-12-16 | One-way valve of air compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922259846.8U CN211550639U (en) | 2019-12-16 | 2019-12-16 | One-way valve of air compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211550639U true CN211550639U (en) | 2020-09-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922259846.8U Active CN211550639U (en) | 2019-12-16 | 2019-12-16 | One-way valve of air compressor |
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| CN (1) | CN211550639U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112013132A (en) * | 2020-09-27 | 2020-12-01 | 湖南创大玉兔化工有限公司 | Acidolysis corrosion-resistant air compression blowing tee bend device |
-
2019
- 2019-12-16 CN CN201922259846.8U patent/CN211550639U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112013132A (en) * | 2020-09-27 | 2020-12-01 | 湖南创大玉兔化工有限公司 | Acidolysis corrosion-resistant air compression blowing tee bend device |
| CN112013132B (en) * | 2020-09-27 | 2022-06-07 | 湖南创大玉兔化工有限公司 | Acidolysis corrosion-resistant air compression blowing tee bend device |
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Denomination of utility model: One way valve for air compressor Effective date of registration: 20210727 Granted publication date: 20200922 Pledgee: Wenling Branch of Bank of China Ltd. Pledgor: ZHEJIANG AUARITA PNEUMATIC TOOLS LLC Registration number: Y2021330000924 |