Multi-spring combined piston type air inlet valve

Abstract

The utility model provides a multi-spring combined piston type air inlet valve. The multi-spring combined piston type air inlet valve comprises a valve body, a valve rod, a piston, a multi-spring combined piece and a valve clack. The valve body comprises a main body part and an air inlet channel, and the valve rod is arranged in the main body part in the direction parallel to the length direction of the main body part. The multi-spring assembly comprises at least two springs, the springs are arranged on the valve rod in a sleeving mode, one end of the multi-spring assembly is fixed to the piston, and the other end of the multi-spring assembly is fixed to the position, close to the valve clack, of the main body part; the piston and the valve clack are arranged in the main body part, the piston is arranged at one end of the valve rod, the piston drives the valve clack to be opened or closed under the action of the elastic force of the multi-spring assembly, the valve rod is used for transmitting driving force, and the valve clack is used for opening or closing the air inlet channel. According to the air inlet valve, a multi-spring combined structure is adopted, the reset speed of the valve clack is increased, the overall height of the air inlet valve is reduced, and therefore the air inlet valve adapts to application scenes needing to be rapidly closed, large in drift diameter and limited in installation height.

Description

Technical Field

[0001] The present disclosure relates to the technical field of air compressor components, and in particular to a piston-type intake valve with a multi-spring combination. Background Art

[0002] Inlet valves are widely used in the field of industrial automation processes. Inlet valves are mainly used in screw air compressor systems. Through the opening and closing actions of the intake valves, the flow direction of the pipeline medium can be switched or the intake capacity can be adjusted according to the changes in system pressure.

[0003] Intake valve technology is increasingly used in various industries. The performance requirements of traditional intake valves are constantly increasing. It is urgent to develop new intake valve products that meet market requirements. When the commonly used intake valves stop inhaling, the closing speed of the valve disc has a long delay, and under the same large diameter, the overall height of the intake valve is relatively high, which can no longer meet the application scenarios that require rapid closing and large diameter and limited installation height. Utility Model Content

[0004] In view of the defects in the prior art, the purpose of the present invention is to provide a piston-type intake valve with a multi-spring combination, which adopts a multi-spring combination structure to accelerate the resetting speed of the valve disc and reduce the overall height of the intake valve to adapt to application scenarios that require rapid closure of large diameters and limited installation height.

[0005] According to one aspect of the present disclosure, there is provided a piston-type intake valve with a multi-spring combination, comprising: a valve body, a valve stem, a piston, a multi-spring assembly, and a valve disc;

[0006] The valve body comprises a main body and an air inlet passage, and the valve stem is arranged inside the main body along a direction parallel to the length of the main body;

[0007] The multi-spring assembly comprises at least two springs, each of which is sleeved on the valve stem, one end of the multi-spring assembly is fixed to the piston, and the other end is fixed to the main body near the valve disc;

[0008] The piston and the valve flap are arranged inside the main body, the piston is arranged at one end of the valve stem, and the valve flap is arranged at the other end of the valve stem. The piston drives the valve flap to open or close under the elastic force of the multi-spring assembly, the valve stem is used to transmit driving force, and the valve flap is used to open or close the air intake channel.

[0009] Optionally, the at least two springs in the multi-spring assembly have the same height, and the diameters of each spring are different. The at least two springs are nested with each other, wherein the spring with a larger diameter is nested on the outside of the spring with a smaller diameter, and the sum of the elastic forces of all the springs is the total elastic force of the multi-spring assembly.

[0010] Optionally, a first groove is provided at the bottom of the piston, one end of the spring in the multi-spring assembly is fixed in the first groove, a second groove is provided in the main body near the valve disc, and the other end of the spring of the multi-spring assembly is fixed in the second groove.

[0011] Optionally, a gap is reserved between each of the springs of the multi-spring assembly.

[0012] Optionally, the air inlet passage is arranged on the outer side wall of the main body, and the air inlet passage is communicated with the main body, and the air inlet passage is used to let in air.

[0013] Optionally, the air intake valve further includes a solenoid valve, which is disposed on an outer wall of the main body and is used to control the valve flap to open or close.

[0014] Optionally, when the solenoid valve is opened, compressed air is introduced into the main body, and the compressed air drives the piston to move in a first direction, thereby overcoming the elastic force of the multi-spring assembly to open the valve flap.

[0015] Optionally, when the solenoid valve is closed, the multi-spring assembly drives the piston to move in the second direction to close the valve flap.

[0016] Optionally, the air intake valve further comprises a sealing member, wherein the sealing member is disposed on the piston and is used for sealing the main body.

[0017] Optionally, the air intake valve further comprises a one-way valve, which is arranged on the other end of the valve stem and is used for one-way intake of air into the air compressor.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] Through the above technical solution, a multi-spring assembly is adopted, and the overall spring height is reduced by multiple springs while maintaining a certain total elastic force, thereby reducing the stroke of the piston and accelerating the resetting speed of the valve disc; while the spring height is reduced, the overall height of the intake valve can also be reduced, so that the entire intake valve meets the requirements of quickly closing large diameters and application scenarios with limited installation height.

[0020] The multi-spring combination piston intake valve disclosed in the present invention has a valve flap that opens when in the intake state, and the valve flap extends into the intake chamber of the compressor, thereby further reducing the overall height of the multi-spring combination piston intake valve and ensuring the application scenario with large requirements for large diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Other features, objects and advantages of the present disclosure will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0022] Figure 1 It is a perspective view of a piston-type intake valve with multiple springs provided by an exemplary embodiment of the present disclosure.

[0023] Figure 2 It is a left side view of a piston-type intake valve with multiple springs provided by an exemplary embodiment of the present disclosure.

[0024] Figure 3 It is a schematic diagram of the overall structure of a piston-type intake valve with multiple springs provided by an exemplary embodiment of the present disclosure.

[0025] Figure 4 It is a top view of a piston-type intake valve with multiple springs provided by an exemplary embodiment of the present disclosure.

[0026] Figure 5 It is a schematic diagram of the installation of a multi-spring assembly provided by an exemplary embodiment of the present disclosure.

[0027] Description of Reference Numerals

[0028] 100 Multi-spring piston intake valve

[0029] 1 Valve body

[0030] 11 Intake duct

[0031] 12 Main body

[0032] 2 Seals

[0033] 3 Piston

[0034] 4 Spring

[0035] 401 First Spring

[0036] 402 Second Spring

[0037] 403 Third Spring

[0038] 5. Valve stem

[0039] 6 Disc

[0040] 7 Check valve

[0041] 8 Solenoid valve DETAILED DESCRIPTION

[0042] The present disclosure is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present disclosure, but are not intended to limit the present disclosure in any form. It should be noted that, for those of ordinary skill in the art, several variations and improvements may be made without departing from the concept of the present disclosure. These all fall within the scope of protection of the present disclosure.

[0043] The air intake valve is the breathing port of the air compressor. Ordinary air enters the head of the air compressor through the air intake valve. Ordinary air is compressed to form compressed gas. The air intake valve can be used to control the loading, unloading and flow of ordinary air into the air compressor. In the prior art, the air intake generally uses a single spring structure with the same wire diameter and diameter, which often increases the spring height, thereby increasing the stroke of the piston. A longer stroke will increase the reset time. At the same time, when the spring height of the single spring structure increases, the height of the valve body will increase, making it difficult to meet the needs of quickly closing large diameters and application scenarios with limited installation height.

[0044] Figure 1 It is a perspective view of a piston-type intake valve with multiple springs provided by an exemplary embodiment of the present disclosure. Figure 2 It is a left side view of a piston-type intake valve with multiple springs provided by an exemplary embodiment of the present disclosure. Figure 3 It is a schematic diagram of the overall structure of a piston-type intake valve with multiple springs provided by an exemplary embodiment of the present disclosure. Figure 4 It is a top view of a piston-type intake valve with multiple springs provided by an exemplary embodiment of the present disclosure.

[0045] like Figures 1 to 4 As shown, the present disclosure provides a multi-spring combined piston type intake valve 100, comprising: a valve body 1, a valve stem 5, a piston 3, a multi-spring assembly, and a valve flap 6.

[0046] The valve body 1 includes a main body 12 and an air inlet passage 11 , and the valve stem 5 is arranged inside the main body 12 along a direction parallel to the length of the main body 12 .

[0047] The air inlet passage 11 is disposed on the outer side wall of the main body 12 , and the air inlet passage 11 is communicated with the main body 12 . The air inlet passage 11 is used to allow air to pass through, and the main body 12 is used to open the valve flap 6 .

[0048] The multi-spring assembly includes at least two springs 4 , all of which are sleeved on the valve stem 5 , one end of the multi-spring assembly is fixed to the piston 3 , and the other end is fixed to the main body near the valve disc 6 .

[0049] The piston 3 and the valve flap 6 are arranged inside the main body 12. The piston 3 is arranged at one end of the valve stem 5, and the valve flap 6 is arranged at the other end of the valve stem 5. The piston 3 drives the valve flap 6 to open or close under the action of the elastic force of the multi-spring assembly. The valve stem 5 is used to transmit the driving force, and the valve flap 6 is used to open or close the intake channel 11.

[0050] Compared with the single spring structure of the same wire diameter and diameter used in the prior art, the multi-spring combination structure used in this embodiment can reduce the spring height, thereby reducing the stroke of the piston 3. The reduced stroke of the piston 3 can speed up the reset speed of the valve flap 6, thereby reducing the reset time. At the same time, the number of springs 4 is increased while maintaining the total elastic force constant. Because the multi-spring assembly reduces the spring height, the overall height of the intake valve 100 can be reduced, so that the entire intake valve can well meet the needs of quickly closing large diameters and application scenarios with limited installation height.

[0051] In the above embodiment, there can be two or more springs 4, such as 3, 4, 5, 6, etc. The specific number of springs 4 can be determined according to the total elastic force of the required multi-spring assembly and the overall height requirement of the intake valve 100. For example, the higher the total elastic force of the required multi-spring assembly, the more springs 4 can be used, and the lower the overall height requirement of the intake valve 100, the more springs 4 can be used.

[0052] Correspondingly, the lower the total elastic force of the required multi-spring assembly, the fewer the number of springs 4 can be; the higher the overall height of the intake valve 100, the fewer the number of springs 4 can be. In practice, an optimized combination can be performed based on technical parameters and space requirements.

[0053] In a possible embodiment, the multi-spring assembly can use at least two springs 4 to close the valve flap 6. Compared with the single spring setting of the prior art, the height of the multi-spring assembly can be reduced while keeping the total elastic force of the multi-spring assembly the same as the elastic force of a single spring, so that the multi-spring assembly can accelerate the closing of the valve flap 6 through the elastic force and reduce the overall height of the piston-type intake valve 100 of the multi-spring assembly.

[0054] In a possible embodiment, at least two springs 4 in the multi-spring assembly have the same height, and the diameters of each spring 4 are different, and at least two springs 4 are mutually sleeved. The spring 4 with a larger diameter is sleeved on the outside of the spring 4 with a smaller diameter, and the multiple springs 4 are sleeved in sequence according to the diameter size, and the sum of the elastic forces of all the springs 4 is the total elastic force of the multi-spring assembly.

[0055] In a possible embodiment, in order to better ensure the stability of the spring 4, a first groove can be provided at the bottom of the piston 3, and one end of the spring 4 of the multi-spring assembly is fixed in the first groove at the bottom of the piston 3. Preferably, a second groove is provided at the main body 12 near the valve disc 6, and the other end of the spring 4 of the multi-spring assembly is fixed in the second groove. This arrangement can ensure the stability of the spring to meet the design requirements.

[0056] Figure 5 It is a schematic diagram of the installation of a multi-spring assembly provided by an exemplary embodiment of the present disclosure.

[0057] like Figure 5 As shown, in this embodiment, three springs are connected to each other, and the three springs are a first spring 401, a second spring 402, and a third spring 403. Figure 5 It can be seen that the first spring 401, the second spring 402, and the third spring 403 of the three springs are independent of each other. The two ends of the first spring 401, the second spring 402, and the third spring 403 are respectively fixed in the first groove on the piston 3 and the second groove of the main body 12 on the valve body 1 through the inner diameter or the outer diameter. In order to make the design simpler and avoid mutual interference between the multiple springs, after being mutually sleeved, a gap is retained between each of the springs of the multi-spring assembly, that is, a gap is retained between the first spring 401, the second spring 402, and the third spring 403.

[0058] In the present disclosure, when the spring 4 in the multi-spring combined piston-type intake valve 100 is in a free state, the valve of the intake valve is closed, that is, the valve flap 6 is also in a closed state. When compressed air is introduced, the piston 3 overcomes the elastic force of the spring 4 under the pressure of the compressed air and pushes the valve stem 5 to move, so that the valve flap 6 moves in the direction of leaving the valve body 1, and the valve is opened, that is, the valve flap 6 is in an open state. When the introduction of compressed air stops, the rebound force of the spring 4 drives the piston 3 to move and reset, and the valve is closed, that is, the valve flap 6 is closed.

[0059] In a possible embodiment, the valve flap 6 is also used to control the flow rate of air entering the air intake passage 11 . Specifically, the control can be achieved by the opening size of the valve flap 6 .

[0060] like Figure 2 As shown, in a possible embodiment, a multi-spring combined piston-type intake valve 100 further includes a solenoid valve 8, which is disposed on the outer wall of the main body 12, and is used to control the opening or closing of the valve flap 6. The opening size of the valve flap 6 can be controlled by the solenoid valve 8, thereby controlling the intake air flow rate.

[0061] As an example, when the solenoid valve 8 is opened, compressed air is introduced into the main body 11 , and the compressed air drives the piston 3 to move in a first direction, overcoming the elastic force of at least two springs 4 to open the valve flap 6 .

[0062] like Figures 1 to 4 As shown, in the present disclosure, the first direction may refer to a longitudinal upward direction.

[0063] As another example, when the solenoid valve 8 is closed, the multi-spring assembly drives the piston 3 to move in the second direction to close the valve flap 6 .

[0064] like Figures 1 to 4 As shown, in the present disclosure, the second direction may refer to a longitudinal downward direction.

[0065] The first direction and the second direction are opposite directions. In addition, in the present disclosure, the longitudinal upward direction and the longitudinal downward direction are only for the piston-type intake valve 100 with multiple springs. Figures 1 to 4 Taking the posture shown as an example, if the multi-spring combination piston type intake valve 100 is placed in other postures, the first direction and the second direction can represent other directions.

[0066] like Figure 1 As shown, in a possible embodiment, a sealing member 2 is further included. The sealing member 2 is disposed on the piston 3 , and the sealing member 2 is used to seal the main body 12 .

[0067] Among them, between one end of the main body 12 and the piston 3, at least part of the accommodating space forms a piston rodless cavity, and the piston 3 can reciprocate in the piston rodless cavity. The seal 2 is used to seal the main body 12 to maintain the air tightness of the piston rodless cavity.

[0068] like Figure 1 As shown, in a possible embodiment, a multi-spring combined piston type intake valve 100 further includes a one-way valve 7, which is disposed on the other end of the valve stem 5, and is used for one-way air intake to the air compressor.

[0069] Among them, the one-way valve 7 can only allow air to be introduced into the air compressor through the multi-spring combined piston-type intake valve 100, and the gas cannot flow through the one-way valve 7 to the multi-spring combined piston-type intake valve 100.

[0070] In a possible embodiment, when the valve flap 6 is opened, the valve flap 6 extends into the suction chamber of the air compressor.

[0071] The multi-spring combination piston intake valve 100 disclosed in the present invention, when in the intake state, the valve flap 6 opens and extends into the intake chamber of the compressor, so that the overall height of the multi-spring combination piston intake valve 100 is further reduced and it is ensured to adapt to the application scenarios requiring a large diameter.

[0072] In a possible embodiment, when the piston-type air intake valve 100 with multiple springs on the air compressor is started, the motor drives the main engine to be unloaded. When loading is required, the piston-type air intake valve 100 with multiple springs is opened, and an air pipe with an inner diameter greater than 5 mm is provided on the oil-gas separation barrel cover of the air compressor to pass the compressed air into the solenoid valve 8 through the air pipe. The solenoid valve 8 is powered on, the solenoid valve 8 is opened, and the compressed air passes through the solenoid valve 8 into the piston rodless cavity in the valve body 1, and the compressed air drives the piston 3 to move in the first direction, the valve stem 5 transmits the driving force generated by the compressed air, and at least two springs 4 provided in the main body 12 are compressed, and the piston 3 overcomes the elastic force of at least two springs 4 to open the valve flap 6. The valve flap 6 is opened, and the valve flap 6 extends into the suction cavity of the air compressor, the air intake channel 11 is opened, and ordinary air passes into the air compressor through the air intake channel 11 and the one-way valve 7, and the air compressor is loaded.

[0073] In another possible embodiment, the solenoid valve 8 is disconnected from the power supply, the solenoid valve 8 is closed, the compressed air stops entering the piston rodless chamber in the valve body 1, and the vent valve arranged on the intake valve is opened. Then, the remaining compressed air in the piston rodless chamber is divided into two paths, one path is exhausted through the vent valve, and the other path is passed into the air compressor. Then, the spring 4 relaxes, and the spring 4 drives the piston 3 to move in the second direction, closing the valve flap 6, closing the intake channel 11, and closing the piston intake valve 100 with multiple springs.

[0074] The multi-spring combined piston-type intake valve 100 provided in the present disclosure can adapt to the intake valve scenario of large diameter and limited installation height that requires rapid closing, thus meeting the diversified needs of the market.

[0075] In the description of the above embodiments, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure. Similarly, "first" and "second" do not indicate an order, but are used to distinguish corresponding technical features.

[0076] The above describes the specific embodiments of the present disclosure. It should be understood that the present disclosure is not limited to the above specific embodiments, and those skilled in the art can make various modifications or variations within the scope of the claims, which does not affect the essence of the present disclosure.

Claims

1. A multi-spring combined piston type intake valve, characterized in that: include: Valve body, valve stem, piston, multi-spring assembly and valve disc; The valve body comprises a main body and an air inlet passage, and the valve stem is arranged inside the main body along a direction parallel to the length of the main body; The multi-spring assembly comprises at least two springs, each of which is sleeved on the valve stem, one end of the multi-spring assembly is fixed to the piston, and the other end is fixed to the main body near the valve disc; The piston and the valve flap are arranged inside the main body, the piston is arranged at one end of the valve stem, and the valve flap is arranged at the other end of the valve stem. The piston drives the valve flap to open or close under the elastic force of the multi-spring assembly, the valve stem is used to transmit driving force, and the valve flap is used to open or close the air intake channel.

2. The multi-spring combined piston type intake valve according to claim 1, characterized in that: The at least two springs in the multi-spring assembly have the same height, and the diameters of each spring are different. The at least two springs are mutually sleeved, wherein the spring with a larger diameter is sleeved on the outside of the spring with a smaller diameter, and the sum of the elastic forces of all the springs is the total elastic force of the multi-spring assembly.

3. The multi-spring combined piston type intake valve according to claim 2, characterized in that: A first groove is arranged at the bottom of the piston, and one end of the spring in the multi-spring assembly is fixed in the first groove; a second groove is arranged near the valve disc in the main body, and the other end of the spring of the multi-spring assembly is fixed in the second groove.

4. The multi-spring combined piston type intake valve according to claim 2, characterized in that: A gap is reserved between each of the springs of the multi-spring assembly.

5. The multi-spring combined piston type intake valve according to claim 1, characterized in that: The air inlet passage is arranged on the outer side wall of the main body, and the air inlet passage is communicated with the main body, and the air inlet passage is used for letting in air.

6. The multi-spring combined piston type intake valve according to claim 1, characterized in that: It also includes a solenoid valve, which is arranged on the outer side wall of the main body and is used to control the valve flap to open or close.

7. The multi-spring combined piston type intake valve according to claim 6, characterized in that: When the solenoid valve is opened, compressed air is introduced into the main body, and the compressed air drives the piston to move in a first direction, thereby overcoming the elastic force of the multi-spring assembly to open the valve flap.

8. The multi-spring combined piston type intake valve according to claim 6, characterized in that: When the solenoid valve is closed, the multi-spring assembly drives the piston to move in the second direction to close the valve flap.

9. The multi-spring combined piston type intake valve according to any one of claims 1 to 8, characterized in that: The utility model further comprises a sealing member, wherein the sealing member is arranged on the piston and is used for sealing the main body.

10. The multi-spring combined piston type intake valve according to any one of claims 1 to 8, characterized in that: It also includes a one-way valve, which is arranged on the other end of the valve stem and is used for one-way air supply to the air compressor.

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