CN213419301U - Air compressor machine admission valve - Google Patents
Air compressor machine admission valve Download PDFInfo
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- CN213419301U CN213419301U CN202021792400.8U CN202021792400U CN213419301U CN 213419301 U CN213419301 U CN 213419301U CN 202021792400 U CN202021792400 U CN 202021792400U CN 213419301 U CN213419301 U CN 213419301U
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Abstract
The utility model discloses an air compressor air inlet valve, which comprises a valve body, wherein a valve cavity is arranged in the valve body, the two ends of the valve body are respectively provided with an air inlet and an air outlet which are communicated with the valve cavity, and a valve plate component and a piston component are arranged in the valve cavity; the valve plate assembly comprises a valve rod and a top cover, and a sealing gasket in sealing fit with the air inlet is embedded in the top cover; the piston assembly comprises a piston chamber, a guide cover and a piston, a first spring is arranged between the guide cover and the piston in a propping manner, and a first through hole for communicating the inner cavity of the piston chamber with the valve cavity is formed in the guide cover; the piston is made of engineering plastics and is connected with a piston rod; the piston rod is the hollow tube, and the upper end and the valve rod of piston rod cup joint the cooperation, and piston rod and direction lid sliding fit, the second through-hole of intercommunication piston chamber inner chamber and piston rod inner chamber is seted up to the lateral wall of piston rod, is equipped with the second spring in the piston rod, and the second spring has the trend that makes the sealed air inlet of top cap all the time. The utility model has the advantages of simple structure, stable movement, good sealing performance and low cost.
Description
Technical Field
The utility model relates to an air compressor machine technical field, in particular to air compressor machine admission valve.
Background
The air compressor is a main part in the working of an air source, can convert the mechanical energy of a motor into gas pressure energy, is a device for changing the air pressure of compressed air, and is widely applied to various industries. The air inlet valve is a core part for adjusting the air quantity of the piston type air compressor, is particularly critical in a matching set of the piston type air compressor, and directly influences the overall performance of the screw compressor. At present, an air inlet valve mainly drives a valve plate structure through a piston structure to close an air inlet, and pushes the valve plate structure to overcome the pressure of the piston structure after the air pressure reaches a preset value, so as to open the air inlet, but the problems of unstable motion of the piston structure and poor air inlet sealing performance still exist at present; and the piston generally has the problems of relatively troublesome processing and higher cost.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to prior art's defect and not enough, provide an air compressor machine admission valve, have simple structure, motion stationary, sealing performance is good and advantage with low costs.
The utility model provides a technical scheme that its technical problem adopted is: an air inlet valve of an air compressor comprises a valve body, wherein a valve cavity is arranged in the valve body, an air inlet and an air outlet which are communicated with the valve cavity are respectively arranged at two ends of the valve body, and a valve plate assembly and a piston assembly driving the valve plate assembly to seal the air inlet are arranged in the valve cavity; the valve plate assembly comprises a valve rod and a top cover fixedly arranged at the top end of the valve rod, and a sealing gasket in sealing fit with the air inlet is embedded in the top cover; the piston assembly comprises a piston chamber fixedly arranged in the valve body, a guide cover covered on the piston chamber, and a piston in sliding fit with the inner side wall of the piston chamber, a first spring is arranged between the guide cover and the piston in a propping manner, and a first through hole for communicating the inner cavity of the piston chamber with the valve cavity is formed in the guide cover; the piston is made of engineering plastics and is connected with a piston rod; the piston rod is a hollow tube, the upper end of the piston rod extends through the guide cover along the axial direction and is in sleeve joint fit with the valve rod, the piston rod is in sliding fit with the guide cover, a second through hole which is communicated with the inner cavity of the piston chamber and the inner cavity of the piston rod is formed in the side wall of the piston rod, a second spring is arranged in the piston rod, and the second spring always tends to enable the top cover to seal the air inlet.
Further, the piston divides the inner cavity of the piston chamber into an upper air chamber and a lower air chamber, the first spring is arranged in the upper air chamber and sleeved outside the piston rod, and the lower air chamber is communicated with the atmosphere through a flow passage; the balance of the air pressure in the upper air chamber and the lower air chamber is ensured, and the piston moves stably and reliably.
Furthermore, the piston is sleeved with an O-shaped ring, so that the relative sealing performance of the upper air chamber and the lower air chamber is ensured.
Furthermore, the piston chamber is fixed in the valve body through a plurality of supporting ribs, so that the piston assembly is convenient to mount.
Furthermore, the guide cover is annular, the outer ring of the guide cover is in sealing fit with the piston chamber, the inner ring of the guide cover is provided with a bearing, and the piston rod is in sliding fit with the bearing; the stability of the movement is improved.
Furthermore, the valve plate assembly also comprises a diaphragm, an elastic sheet and a splicing cap which are sequentially sleeved on the valve rod from top to bottom and are all arranged at the bottom of the top cover; the air inlet sealing performance is improved.
Further, the top cover is fixed at the top end of the valve rod through a screw.
The utility model has the advantages that: firstly, a valve plate assembly and a piston assembly for driving the valve plate assembly to seal an air inlet are arranged in a valve cavity, a sealing gasket which is in sealing fit with the air inlet is embedded on a top cover, a first spring is arranged between a guide cover and the piston in a propping manner, a second spring is arranged in a piston rod, the second spring always drives the top cover to seal the air inlet, the air inlet is in a normally closed state under the action of the first spring, the second spring and the sealing gasket, and the sealing performance of the air inlet is improved; secondly, the piston is made of engineering plastics, the piston rod is of a hollow tube structure, so that the piston and the piston rod are respectively made, the structure is simpler, the manufacture is more convenient, the cost is greatly reduced, the weight of the piston and the piston rod is effectively reduced, a first through hole for communicating an inner cavity of the piston chamber with a valve cavity is formed in the guide cover, and a second through hole for communicating the inner cavity of the piston chamber with an inner cavity of the piston rod is formed in the side wall of the piston rod, so that the air pressure of the piston chamber is smaller, and the piston is lighter, more stable and more reliable in movement; generally, the utility model discloses simple structure, motion steady, sealing performance is good and advantage with low costs have been possessed.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Shown in the figure: 1-a valve body; 1.1-valve cavity; 1.2-gas inlet; 1.3-gas outlet; 1.4-flow channel; 2-a valve plate assembly; 21-a valve stem; 22-a top cover; 23-a gasket; 24-a membrane; 25-a spring plate; 26-splicing the cap; 27-a screw; 3-a piston assembly; 31-a piston chamber; 32-a guide cover; 32.1 — a first via; 33-a piston; 34-a first spring; 35-a piston rod; 35.1-a second via; 36-a second spring; 37-O-ring; 38-bearing.
Detailed Description
For a more intuitive and complete understanding of the technical solution of the present invention, the following non-limiting characteristic description is now performed by combining the drawings of the present invention:
as shown in fig. 1, an air intake valve of an air compressor comprises a valve body 1, a valve cavity 1.1 is arranged in the valve body 1, an air inlet 1.2 and an air outlet 1.3 which are communicated with the valve cavity 1.1 are respectively arranged at two ends of the valve body 1, and a valve plate assembly 2 and a piston assembly 3 which drives the valve plate assembly 2 to seal the air inlet 1.2 are arranged in the valve cavity 1.1; the valve plate component 2 comprises a valve rod 21 and a top cover 22 fixedly arranged at the top end of the valve rod 21, and a sealing gasket 23 in sealing fit with the air inlet 1.2 is embedded in the top cover 22; the piston assembly 3 comprises a piston chamber 31 fixedly arranged in the valve body 1, a guide cover 32 covering the piston chamber 31, and a piston 33 in sliding fit with the inner side wall of the piston chamber 31, a first spring 34 is arranged between the guide cover 32 and the piston 33 in a supporting manner, and a first through hole 32.1 communicating the inner cavity of the piston chamber 31 and the valve cavity 1.1 is formed in the guide cover 32; the piston 33 is made of engineering plastics, and a piston rod 35 is connected to the piston 33; the piston rod 35 is a hollow tube, the upper end of the piston rod 35 extends through the guide cover 32 along the axial direction and is in sleeve joint fit with the valve rod 21, the piston rod 35 is in sliding fit with the guide cover 32, the side wall of the piston rod 35 is provided with a second through hole 35.1 communicating the inner cavity of the piston chamber 31 and the inner cavity of the piston rod 35, a second spring 36 is arranged in the piston rod 35, and the second spring 36 always tends to enable the top cover 22 to seal the air inlet 1.2.
Preferably, the valve body 1 is an upper valve body and a lower valve body which are mutually covered, so that the valve body 1 is convenient to manufacture; and a sealing ring is embedded at the matching joint of the upper valve body and the lower valve body, so that the sealing property of the valve body 1 is ensured.
The piston 33 divides the inner cavity of the piston chamber 31 into an upper air chamber and a lower air chamber, the first spring 34 is arranged in the upper air chamber and sleeved outside the piston rod 35, and the lower air chamber is communicated with the atmosphere through a flow passage 1.4; an O-ring 37 is fitted over the piston 33.
Specifically, during actual operation, the flow channel 1.4 is connected to the vent valve, the pressure of the lower air chamber is realized through the vent valve, the vent valve is enabled to be filled with air, the pressure of the lower air chamber is increased, the piston 33 is enabled to move upwards, the sealing gasket 23 on the top cover 22 is enabled to be more tightly sealed with the air inlet 1.2, and therefore the pressure of the air inlet 1.2 entering the air inlet valve is adjusted.
The piston chamber 31 is fixed in the valve body 1 by a plurality of support ribs.
The guide cover 32 is annular, the outer ring of the guide cover 32 is in sealing fit with the piston chamber 31, the inner ring of the guide cover 32 is provided with a bearing 38, and the piston rod 35 is in sliding fit with the bearing 38.
The valve plate component 2 further comprises a diaphragm 24, an elastic sheet 25 and a split cap 26 which are sequentially sleeved on the valve rod 21 from top to bottom and are all arranged at the bottom of the top cover 22; the cap 22 is fixed to the top end of the valve stem 21 by screws 27.
Specifically, a gasket is arranged between the split cap 26 and the valve rod 21, so that the valve plate assembly 2 is firmly connected and is not easy to loosen.
The utility model discloses a concrete theory of operation as follows: under normal conditions, under the elastic force of the first spring 34 and the second spring 36, the sealing gasket 23 on the top cover 22 tightly abuts against the air inlet 1.2 to seal the air inlet 1.2, so that the air inlet valve is in a normally closed state; when the air compressor is started, the air pressure of the air inlet 1.2 is enough to overcome the elastic force of the second spring 36, the valve rod 21 slides downwards relative to the piston rod 35, the top cover 22 also slides downwards relatively, the air inlet 1.2 is opened, and air flows out of the air outlet 1.3 through the valve cavity 1.1.
The above is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles in accordance with the claims of the present invention are included in the claims of the present invention.
Claims (7)
1. An air compressor air inlet valve comprises a valve body (1), wherein a valve cavity (1.1) is arranged in the valve body (1), an air inlet (1.2) and an air outlet (1.3) which are communicated with the valve cavity (1.1) are respectively arranged at two ends of the valve body (1), a valve plate assembly (2) and a piston assembly (3) driving the valve plate assembly (2) to seal the air inlet (1.2) are arranged in the valve cavity (1.1); the valve plate assembly (2) comprises a valve rod (21) and a top cover (22) fixedly arranged at the top end of the valve rod (21), and a sealing gasket (23) in sealing fit with the air inlet (1.2) is embedded in the top cover (22);
the method is characterized in that: the piston assembly (3) comprises a piston chamber (31) fixedly arranged in the valve body (1), a guide cover (32) covering the piston chamber (31), and a piston (33) in sliding fit with the inner side wall of the piston chamber (31), a first spring (34) is arranged between the guide cover (32) and the piston (33) in a supporting manner, and a first through hole (32.1) for communicating the inner cavity of the piston chamber (31) with the valve cavity (1.1) is formed in the guide cover (32); the piston (33) is made of engineering plastics, and a piston rod (35) is connected to the piston (33); the piston rod (35) is a hollow tube, the upper end of the piston rod (35) extends through the guide cover (32) along the axial direction and is in sleeve joint with the valve rod (21), the piston rod (35) is in sliding fit with the guide cover (32), a second through hole (35.1) communicated with the inner cavity of the piston chamber (31) and the inner cavity of the piston rod (35) is formed in the side wall of the piston rod (35), a second spring (36) is arranged in the piston rod (35), and the second spring (36) always has the tendency of enabling the top cover (22) to seal the air inlet (1.2).
2. The air compressor intake valve according to claim 1, wherein: piston (33) will the inner chamber of piston chamber (31) is divided into upper air chamber and lower air chamber, first spring (34) set up in the upper air chamber and the cover is located piston rod (35) outside, lower air chamber communicates with each other with the atmosphere through runner (1.4).
3. The air compressor intake valve according to claim 2, wherein: and an O-shaped ring (37) is sleeved on the piston (33).
4. The air compressor intake valve according to claim 3, wherein: the piston chamber (31) is fixed in the valve body (1) through a plurality of supporting ribs.
5. The air compressor intake valve according to claim 1, wherein: the guide cover (32) is annular, the outer ring of the guide cover (32) is in sealing fit with the piston chamber (31), a bearing (38) is installed on the inner ring of the guide cover (32), and the piston rod (35) is in sliding fit with the bearing (38).
6. The air compressor intake valve according to claim 1, wherein: valve plate subassembly (2) still include from last to down cup joint in proper order in on valve rod (21) and all set up in diaphragm (24), shell fragment (25) and piece together cap (26) of top cap (22) bottom.
7. The air compressor intake valve according to claim 6, wherein: the top cover (22) is fixed at the top end of the valve rod (21) through a screw (27).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021792400.8U CN213419301U (en) | 2020-08-25 | 2020-08-25 | Air compressor machine admission valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021792400.8U CN213419301U (en) | 2020-08-25 | 2020-08-25 | Air compressor machine admission valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213419301U true CN213419301U (en) | 2021-06-11 |
Family
ID=76258115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021792400.8U Active CN213419301U (en) | 2020-08-25 | 2020-08-25 | Air compressor machine admission valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213419301U (en) |
-
2020
- 2020-08-25 CN CN202021792400.8U patent/CN213419301U/en active Active
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