CN209838698U - Normally open type air inlet valve - Google Patents
Normally open type air inlet valve Download PDFInfo
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- CN209838698U CN209838698U CN201920492418.7U CN201920492418U CN209838698U CN 209838698 U CN209838698 U CN 209838698U CN 201920492418 U CN201920492418 U CN 201920492418U CN 209838698 U CN209838698 U CN 209838698U
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- valve
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- air inlet
- check
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Abstract
The utility model relates to a normally open admission valve, including valve body and disk seat, the valve body bottom is equipped with the discharge opening, the piston below is arranged in to the discharge opening promptly, discharge opening one end is the inlet passage of releasing, discharge opening one end communicates with each other with the piston chamber of releasing, the piston chamber of releasing communicates with each other with the air inlet through the outlet passage of releasing, the disk seat top is arranged in to the air inlet, communicate with each other after the piston control chamber passes through solenoid valve and valve, be equipped with the check valve between solenoid valve and the valve back, check valve check spring is connected to the case of check valve, check valve check spring arranges in the check valve spring holder. The utility model adopts a cut-off on-off structure; during loading, the piston control cavity is communicated with the oil gas barrel through an electromagnetic valve, the piston moves downwards under the action of pressure difference, the air inlet valve is opened, and meanwhile, the discharge is closed; when the air pressure is unloaded, the pressure of the piston control cavity is communicated with the air inlet valve through the electromagnetic valve and the one-way valve, and the piston moves upwards under the action of pressure difference to close the air inlet valve and open the air discharge at the same time.
Description
Technical Field
The utility model relates to an admission valve, especially a normal open admission valve.
Background
At present, the existing normally-open type air inlet valve of a screw machine generally comprises an air inlet valve body, an internal control piston, a relief valve, an electromagnetic valve and the like, and has the disadvantages of complex structure, more leakage points, high cost, more easily-damaged parts and complex later maintenance. The market also has a normally closed air inlet valve without a relief valve structure, a relief inlet of the normally closed air inlet valve is arranged on the side surface of a piston and is exhausted to the front of the valve through a control piston central hole channel, and the on-off of relief is realized by using a slide valve type structure; the reset spring is in control piston bottom, and the gas inlet valve is opened to relying on oil gas bucket pressure to overcome reset spring during the loading, if oil gas bucket pressure is low excessively or the access pipeline is improper, the condition that the gas inlet valve loading became invalid just can appear.
Disclosure of Invention
The utility model aims at overcoming the above not enough, on the basis of guaranteeing original function and performance, provide a simple structure, leak point and vulnerable part reduce by a wide margin open admission valve always.
The purpose of the utility model is realized through the following technical scheme: a normally open air inlet valve comprises a valve body and a valve seat, a valve core is arranged in the valve body, a valve rod is arranged in the valve core, the valve rod is inserted in a piston, a check spring is arranged between the valve rod and the piston, a piston cavity cover is arranged on the piston, a piston control cavity is formed between the piston cavity cover and the valve body, a discharge port is arranged at the bottom of the valve body, namely, the discharge port is arranged below the piston, one end of the discharge port is a discharge inlet channel, one end of the discharge port is communicated with the piston discharge cavity, the piston discharge cavity is communicated with the air inlet through a discharge outlet channel, the air inlet is arranged at the top of the valve seat, when in loading, the control release port is communicated with the piston control cavity through a connector at the bottom of the electromagnetic valve, the piston control cavity is communicated with the valve through a connector at the top of the electromagnetic valve during unloading, a one-way valve is arranged between the connector at the top of the electromagnetic valve and the valve, a valve core of the one-way valve is connected with a one-way valve check spring, and the one-way valve check spring is arranged in a one-way valve spring seat.
The utility model discloses a further improvement lies in: the bottom of the piston is provided with a groove, and a piston relief cavity is formed between the groove and the valve body.
The utility model discloses a further improvement lies in: and the positions of the discharge inlet channel and the discharge outlet channel are respectively provided with an adjusting bolt and a locking nut.
The utility model discloses a further improvement lies in: and a bypass throttling hole is formed in the valve seat.
The utility model discloses a further improvement lies in: an air compensating valve is arranged at the bottom of the valve body, a valve core of the air compensating valve is connected with an air compensating valve check spring, and the air compensating valve check spring is arranged in an air compensating valve spring seat.
The utility model discloses a further improvement lies in: the piston is sleeved with a piston ring and a piston sealing ring, and a discharge opening sealing ring is arranged between the piston and the valve body.
Compared with the prior art, the utility model has the following advantage:
the discharge channel is connected to the bottom of the control piston cavity and then is discharged to the front of the valve through the side channel of the control piston cavity, and the utility model adopts a stop type on-off structure; during loading, the piston control cavity is communicated with the oil gas barrel through an electromagnetic valve, the piston moves downwards under the action of pressure difference, the air inlet valve is opened, and meanwhile, the discharge is closed; when unloading, the pressure of the piston control cavity is communicated with the air inlet valve through the electromagnetic valve and the one-way valve, and the piston moves upwards under the action of differential pressure to close the air inlet valve and open the discharge at the same time; the utility model discloses cancel reset spring, simple structure, the switch is nimble.
Description of the drawings:
fig. 1 is a schematic view of the internal structure of the present invention;
FIG. 2 is a schematic view of the piston and assembly;
FIG. 3 illustrates the communication between the piston control chamber and the solenoid valve and valve via internal passages;
FIG. 4 illustrates the communication between the piston control chamber and the solenoid valve and valve via external passages;
FIG. 5 illustrates the communication between the piston control chamber and the solenoid valve and valve via external passages;
FIG. 6 is a schematic view of the internal structure of the piston control chamber communicating with the solenoid valve and the valve through external passages;
reference numbers in the figures: 1-valve body, 2-valve seat, 3-valve core, 4-valve rod, 5-piston, 6-check spring, 7-piston cavity cover, 8-piston control cavity, 9-discharge port, 10-discharge inlet channel, 11-piston discharge cavity, 12-discharge outlet channel, 13-air inlet and 14-electromagnetic valve, 15-valve rear part, 16-valve core of one-way valve, 17-one-way valve check spring, 18-one-way valve spring seat, 19-adjusting bolt, 20-locking nut, 21-bypass orifice, 22-valve core of air compensating valve, 23-air compensating valve check spring, 24-air compensating valve spring seat, 25-piston ring, 26-piston sealing ring, 27-vent sealing ring and 28-control vent.
The specific implementation mode is as follows:
in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Elements and features described in one embodiment of the invention may be combined with elements and features shown in one or more other embodiments. It should be noted that the illustration omits illustration and description of components and processes known to those of ordinary skill in the art that are not pertinent to the present invention for the sake of clarity. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Fig. 1 shows an embodiment of the normally open intake valve of the present invention, which comprises a valve body 1 and a valve seat 2, wherein a valve core 3 is arranged in the valve body 1, a valve rod 4 is arranged in the valve core 3, the valve rod 4 is inserted in a piston 5, a check spring 6 is arranged between the valve rod 4 and the piston 5, a piston cavity cover 7 is arranged on the piston 5, a piston control cavity 8 is formed between the piston cavity cover 7 and the valve body 1, a discharge port 9 is arranged at the bottom of the valve body 1, i.e. the discharge port 9 is arranged below the piston 5, one end of the discharge port 9 is a discharge inlet channel 10, one end of the discharge port 9 is communicated with a piston discharge cavity 11, the piston discharge cavity 11 is communicated with an air inlet 13 through a discharge outlet channel 12, the air inlet 13 is arranged at the top of the valve seat 2, during loading, the control discharge port 28 is communicated with the piston control cavity 8 through a connector at the bottom of an electromagnetic valve, a one-way valve is arranged between a connector at the top of the electromagnetic valve 14 and the valve back 15, a valve core 16 of the one-way valve is connected with a one-way valve check spring 17, and the one-way valve check spring 17 is arranged in a one-way valve spring seat 18.
The bottom of the piston 5 is provided with a groove, and a piston relief cavity 11 is formed between the groove and the valve body 1, so that the piston can move up and down conveniently.
The bleed inlet passage 10 and the bleed outlet passage 12 are provided with an adjusting bolt 19 and a lock nut 20, which can adjust the flow rate of the inlet air or the outlet air.
The valve seat 2 is provided with a bypass throttle hole 21, and after the intake valve is used for a long time, the bypass throttle hole 21 can avoid the situation that the intake valve cannot be unloaded due to leakage of the check valve.
An air compensating valve is arranged at the bottom of the valve body 1, a valve core 22 of the air compensating valve is connected with an air compensating valve check spring 23, the air compensating valve check spring 23 is arranged in an air compensating valve spring seat 24, and air can be extracted from the valve body through the air compensating valve.
The piston 5 is sleeved with a piston ring 25 and a piston sealing ring 26, and a discharge port sealing ring 27 is arranged between the piston 5 and the valve body 1, namely the discharge port sealing ring 27 is arranged on the piston 5 or the discharge port sealing ring 27 is arranged on the valve body 1.
The discharge channel is connected to the bottom of the control piston cavity and then is discharged to the front of the valve through the side channel of the control piston cavity, and the utility model adopts a stop type on-off structure; during loading, the piston control cavity is communicated with the oil gas barrel through an electromagnetic valve, the piston moves downwards under the action of pressure difference, the air inlet valve is opened, and meanwhile, the discharge is closed; when unloading, the pressure of the piston control cavity is communicated with the valve of the air inlet valve through the electromagnetic valve and the one-way valve, and the piston moves upwards under the action of differential pressure to close the air inlet valve and open the discharge at the same time; the utility model discloses cancel reset spring, simple structure, the switch is nimble.
Finally, it should be noted that: although the present invention and its advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims. Moreover, the scope of the present invention is not intended to be limited to the particular embodiments of the process, machine, means, methods and steps described in the specification. As one of ordinary skill in the art will readily appreciate from the disclosure of the present invention, processes, machines, means, methods, or steps, presently existing or later to be developed that perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein may be utilized according to the present invention. Accordingly, the appended claims are intended to include within their scope such processes, devices, means, methods, or steps.
Claims (6)
1. The utility model provides a normal open type admission valve, includes valve body (1) and disk seat (2), its characterized in that: the valve is characterized in that a valve core (3) is arranged in the valve body (1), a valve rod (4) is arranged in the valve core (3), the valve rod (4) is inserted into a piston (5), a check spring (6) is arranged between the valve rod (4) and the piston (5), a piston cavity cover (7) is arranged on the piston (5), a piston control cavity (8) is formed between the piston cavity cover (7) and the valve body (1), a discharge port (9) is arranged at the bottom of the valve body (1), namely the discharge port (9) is arranged below the piston (5), one end of the discharge port (9) is a discharge inlet channel (10), the discharge port (9) is communicated with an air inlet (13) through a discharge outlet channel (12), the air inlet (13) is arranged at the top of the valve seat (2), and during loading, a control discharge port (28) is communicated with the piston control cavity (8) through a port at the bottom of an electromagnetic valve (14), when the piston is unloaded, the piston control cavity (8) is communicated with the valve back (15) through a connector at the top of the electromagnetic valve (14), a one-way valve is arranged between the connector at the top of the electromagnetic valve (14) and the valve back (15), a valve core (16) of the one-way valve is connected with a one-way valve check spring (17), and the one-way valve check spring (17) is arranged in a one-way valve spring seat (18).
2. A normally open intake valve according to claim 1, wherein: the bottom of the piston (5) is provided with a groove, and a piston relief cavity (11) is formed between the groove and the valve body (1).
3. A normally open intake valve according to claim 1, wherein: and the positions of the discharge inlet channel (10) and the discharge outlet channel (12) are respectively provided with an adjusting bolt (19) and a locking nut (20).
4. A normally open intake valve according to claim 1, wherein: and a bypass throttling hole (21) is formed in the valve seat (2).
5. A normally open intake valve according to claim 1, wherein: an air compensating valve is arranged at the bottom of the valve body (1), a valve core (22) of the air compensating valve is connected with an air compensating valve check spring (23), and the air compensating valve check spring (23) is arranged in an air compensating valve spring seat (24).
6. A normally open intake valve according to claim 1, wherein: piston ring (25) and piston sealing ring (26) are sleeved on piston (5), and a discharge opening sealing ring (27) is arranged between piston (5) and valve body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920492418.7U CN209838698U (en) | 2019-04-12 | 2019-04-12 | Normally open type air inlet valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920492418.7U CN209838698U (en) | 2019-04-12 | 2019-04-12 | Normally open type air inlet valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209838698U true CN209838698U (en) | 2019-12-24 |
Family
ID=68911144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920492418.7U Active CN209838698U (en) | 2019-04-12 | 2019-04-12 | Normally open type air inlet valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209838698U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915379A (en) * | 2019-04-12 | 2019-06-21 | 南通市红星空压机配件制造有限公司 | A kind of intake valve open in usual |
-
2019
- 2019-04-12 CN CN201920492418.7U patent/CN209838698U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915379A (en) * | 2019-04-12 | 2019-06-21 | 南通市红星空压机配件制造有限公司 | A kind of intake valve open in usual |
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