Pressure regulating check valve

Abstract

The utility model discloses a pressure regulating check valve which comprises a valve body, an air outlet is formed in the upper portion of the valve body, an air inlet is formed in the lower portion of the valve body, and the air inlet and the air outlet are both communicated with a control chamber arranged on the side face of the valve body. A valve element is further arranged in the control chamber, and the air inlet and the air outlet are connected or disconnected through the valve element. The valve element comprises a valve rod, an elastic piece is arranged at one end of the valve rod, and the other end of the elastic piece enables a valve clack to abut against the connecting position of the air inlet and the control chamber. When the air pressure of the air outlet is reduced, the air pressure of the air inlet pushes open the valve clack, and at the moment, airflow flows out of the air outlet to supplement the air pressure at the air outlet; meanwhile, when the air pressure at the air outlet reaches a preset value, the air pressure is matched with the elastic piece to promote the valve clack to cut off inflow of the air source. Therefore, the air pressure can be automatically supplemented, and the backflow phenomenon of the air flow at the air outlet can be prevented after the air at the air inlet is cut off.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a pressure regulating check valve. Background Art

[0002] Normal air diffusion causes tire pressure to decrease over time. The normal state of a tire is underinflation. Accordingly, the driver must repeatedly act to maintain tire pressure or the driver will see reduced fuel economy, tire life, and reduced vehicle braking and handling performance. Tire pressure monitoring systems have been proposed to warn the driver when tire pressure is significantly low. However, such systems still rely on the driver to take remedial action to re-inflate the tire to the recommended pressure when warned. Therefore, it is desirable to incorporate a self-inflating feature within the tire that will cause the tire to self-inflate so as to compensate for any drop in tire pressure over time without driver intervention. Utility Model Content

[0003] The purpose of the utility model is to provide a pressure regulating check valve to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pressure-regulating check valve, comprising a valve body, an air outlet being provided above the valve body; wherein, an air inlet is provided below the valve body, and the air inlet and the air outlet are both connected to a control chamber provided on the side of the valve body; a valve core is also provided in the control chamber, and the air inlet and the air outlet are connected or the connection between the air inlet and the air outlet is cut off through the valve core; the valve core comprises a valve stem, and an elastic member is provided at one end of the valve stem, and the other end of the elastic member presses a valve flap provided thereon against the connection between the air inlet and the control chamber.

[0005] As a preferred technical solution of the utility model: an air chamber is also provided at one end of the valve stem facing the valve disc, and the air chamber is connected to the air outlet through an air hole provided.

[0006] As a preferred technical solution of the utility model: the valve core also includes an adjusting rod, and the adjusting rod causes the valve rod to move in the control chamber.

[0007] As a preferred technical solution of the utility model: the valve core also includes a pressing piece; wherein one end of the pressing piece abuts against the adjusting rod, and the other end of the pressing piece abuts against the valve stem.

[0008] As a preferred technical solution of the utility model: the adjusting rod is threadedly connected to the control chamber, and one end of the adjusting rod is also provided with a slotted opening.

[0009] As a preferred technical solution of the utility model: a filter screen is also provided inside the air inlet.

[0010] By adopting the above technical solution, the beneficial effect of the utility model is as follows: when the air pressure at the air outlet is reduced, the air pressure at the air inlet pushes open the valve flap, and the air flows out to the air outlet to supplement the air pressure at the air outlet; at the same time, when the air pressure at the air outlet reaches a predetermined value, the air pressure and the elastic member cooperate to cause the valve flap to cut off the inflow of the air source. Therefore, while realizing the automatic replenishment of the air pressure, after the air inlet is cut off, the phenomenon of the air flow at the air outlet being backflowed can be prevented. Based on this, the use of the device can solve the problem of insufficient air pressure in the tire over time, especially, it can realize the automatic replenishment of the air pressure to reduce the number of driver interventions. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a cross-sectional schematic diagram of the main structure of the utility model;

[0012] Figure 2 It is an exploded schematic diagram of the main structure of the utility model;

[0013] Figure 3 This is a schematic diagram of the exploded structure of the valve core of the utility model;

[0014] Figure 4 It is a schematic diagram of the cross-sectional structure of the valve core of the utility model.

[0015] In the figure: 1. valve body; 2. air inlet; 3. valve core; 30. valve stem; 31. pressing part; 32. adjusting rod; 33. air hole; 34. valve disc; 35. elastic part; 36. air chamber; 37. slot; 4. air outlet; 5. control room; 6. filter screen. DETAILED DESCRIPTION

[0016] Embodiments of the present utility model are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present utility model, and should not be construed as limitations on the present utility model. In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "upper surface", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model 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 should not be construed as a limitation on the present utility model.

[0017] See also Figure 1-4The utility model provides an embodiment: a pressure regulating check valve, comprising a valve body 1, an air outlet 4 is provided above the valve body 1; wherein, an air inlet 2 is provided below the valve body 1, and the air inlet 2 and the air outlet 4 are both connected to a control chamber 5 provided on the side of the valve body 1; a valve core 3 is also provided in the control chamber 5, and the air inlet 2 and the air outlet 4 are connected or the connection between the air inlet 2 and the air outlet 4 is cut off through the valve core 3; the valve core 3 comprises a valve stem 30, and an elastic member 35 is provided at one end of the valve stem 30, and the other end of the elastic member 35 presses a valve flap 34 provided thereon against the connection between the air inlet 2 and the control chamber 5.

[0018] In summary, when the air pressure at the air outlet 4 decreases, the air pressure at the air inlet 2 pushes open the valve flap 34, and the air flows out to the air outlet 4 to supplement the air pressure at the air outlet 4; at the same time, when the air pressure at the air outlet 4 reaches a predetermined value, the air pressure cooperates with the elastic member 35 to cause the valve flap 34 to cut off the inflow of the air source. Therefore, while realizing the automatic replenishment of the air pressure, after the air inlet 2 is cut off, the phenomenon of the air flow at the air outlet 4 being prevented from flowing back can be prevented. Based on this, the valve can not only adjust the opening pressure, but also maintain the pressure; the valve has a simple structure and is suitable for various pressure-maintaining equipment, such as a truck tire inflation and pressure-maintaining system. Specifically, when applied to a truck tire inflation and pressure-maintaining system, the device can solve the problem of insufficient air pressure in the tire over time, and in particular, it can realize automatic replenishment of air pressure to reduce the number of driver interventions.

[0019] Furthermore, since an air chamber 36 is provided at the end of the valve stem 30 facing the valve disc 34, and the air chamber 36 is connected to the air outlet 4 through the air hole 33, the air source at the air outlet 4 is directly connected to the air chamber 36 to improve the sensitivity of the check valve when checking.

[0020] On the basis of the above scheme, since the valve core 3 also includes an adjusting rod 32, and the valve stem 30 is prompted to move in the control chamber 5 by the adjusting rod 32, the valve stem 30 is prompted to move by the adjusting rod 32, so that the pressing force of the valve flap 34 can be increased or decreased, thereby adjusting the intake pressure. Based on this, the setting of the adjusting rod 32 allows the device to adjust the intake pressure as needed, thereby improving the applicability of the device.

[0021] Furthermore, since the valve core 3 also includes a clamping piece 31, wherein one end of the clamping piece 31 abuts against the adjusting rod 32, and the other end of the clamping piece 31 abuts against the valve stem 30, the pressure of the clamping piece 31 is used to control the intake pressure, and the clamping piece 31 can also be used to prevent air source leakage; wherein the clamping piece 31 and the elastic piece 35 are preferably coil springs.

[0022] Furthermore, since the adjusting rod 32 is threadedly connected to the control chamber 5, the adjusting rod 32 is conveniently connected to the control chamber 5 and the processing of the two is also convenient. In particular, the threaded matching method can effectively prevent the adjusting rod 32 from automatically moving without external force. At the same time, since one end of the adjusting rod 32 is also provided with a slotted notch 37, it is convenient for the user to rotate the adjusting rod 32 in the control chamber 5 using tools such as a screwdriver.

[0023] In addition, since a filter screen 6 is provided inside the air inlet 2, the air source can be purified.

[0024] The working principle of the device is as follows: the pre-pressure of the elastic member 35 is changed by adjusting the pressure regulating rod 32 to set the minimum opening pressure of the valve;

[0025] When compressed air is ventilated from the air inlet 2, when the air pressure is greater than the set minimum opening air pressure, the air inlet 2 is connected with the air outlet 4, and the valve port is opened to realize air pressure output, until the air pressure at the air outlet 4 and the force of the pressing member 31 acting on the valve disc 34 are equal to the force of the air pressure at the air inlet 2 acting on the valve disc 34, the valve port is closed, and the connection between the air inlet 2 and the air outlet 4 is cut off;

[0026] When the air pressure at the air outlet 4 drops, the valve port opens again to replenish the air pressure at the air outlet 4 to keep it at a stable air pressure value. When the air pressure at the air inlet 2 drops, the air pressure at the air outlet 4 is locked to keep the original air pressure unchanged.

[0027] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A pressure regulating check valve, characterized in that: It comprises a valve body (1), an air outlet (4) being arranged above the valve body (1); an air inlet (2) being arranged below the valve body (1), and the air inlet (2) and the air outlet (4) are both connected to a control chamber (5) arranged on a side of the valve body (1); A valve core (3) is also provided in the control chamber (5), and the valve core (3) is used to connect the air inlet (2) and the air outlet (4) or to cut off the connection between the air inlet (2) and the air outlet (4); The valve core (3) comprises a valve stem (30), one end of the valve stem (30) is provided with an elastic member (35), and the other end of the elastic member (35) is provided with a valve flap (34) pressed against the connection between the air inlet (2) and the control chamber (5).

2. A pressure regulating check valve according to claim 1, characterized in that: An air chamber (36) is also provided at one end of the valve stem (30) facing the valve flap (34), and the air chamber (36) is connected to the air outlet (4) via an air hole (33).

3. A pressure regulating check valve according to claim 1 or 2, characterized in that: The valve core (3) further comprises an adjusting rod (32), and the adjusting rod (32) causes the valve stem (30) to move in the control chamber (5).

4. A pressure regulating check valve according to claim 3, characterized in that: The valve core (3) further comprises a pressing piece (31); wherein one end of the pressing piece (31) abuts against the adjusting rod (32), and the other end of the pressing piece (31) abuts against the valve stem (30).

5. A pressure regulating check valve according to claim 4, characterized in that: The adjusting rod (32) is threadedly connected to the control chamber (5), and one end of the adjusting rod (32) is also provided with a slotted opening (37).

6. A pressure regulating check valve according to claim 5, characterized in that: A filter screen (6) is also provided inside the air inlet (2).

Images