Automatic reversing valve

Abstract

The utility model discloses an automatic reversing valve which comprises a valve body, a first cavity is formed in the middle of the valve body, a second cavity and a third cavity are formed in the two ends of the first cavity respectively, a first air inlet is formed in the valve body, and one side of the first air inlet is communicated with the second cavity through a conveying channel. A first air outlet and a second air outlet are formed in two ends of the first cavity; the valve element is arranged in the first cavity; the gas pushing button is arranged in the second cavity; the switching device comprises a switching push rod and a locking piece, the locking piece is rotationally arranged in the third cavity, and a limiting groove is formed in the position, abutting against the switching push rod, of the locking piece; according to the reversing valve, an electromagnet and manpower are not needed, the gas flow direction is controlled through opening and closing of the gas flow, the reversing valve is more suitable for an automatic control system, and meanwhile the reversing valve can be used under the extreme condition that electricity cannot be used.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to an automatic reversing valve. Background Technology

[0002] A gas directional control valve is a type of directional control valve that uses compressed air to actuate a valve core, changing the direction of fluid flow. It is an important component of pneumatic control systems and is widely used in various industrial control applications. The core working principle of a gas directional control valve is to change the direction of gas flow by altering the airflow channel, thereby changing the direction of movement of the pneumatic actuator. This function mainly relies on the positional change of the valve core inside the valve body. The valve core is moved between different positions through manual operation or electric drive, thus changing the on / off state of the airflow channel and achieving airflow reversal.

[0003] The manually operated gas directional valves mentioned above are not suitable for automated control systems, resulting in low overall efficiency and requiring a large amount of manpower. The electrically driven method would render the gas directional valves unusable in extreme situations such as power outages.

[0004] For the reasons mentioned above, it is necessary to improve the existing technology. Utility Model Content

[0005] I. Technical problems to be solved

[0006] This utility model addresses the aforementioned deficiencies in the existing technology by proposing an automatic reversing valve to solve the problems mentioned in the background art.

[0007] II. Technical Solution

[0008] To solve the above-mentioned technical problems, this utility model provides an automatic reversing valve, including a valve body, a first cavity in the middle of the valve body, a second cavity and a third cavity communicating with the first cavity at both ends, a first air inlet communicating with the first cavity and the outside, a first air inlet communicating with the outside through a conveying channel on one side of the first air inlet, and a first air outlet and a second air outlet communicating with the outside at both ends of the first cavity.

[0009] A valve core is movably disposed in the inner cavity of the first cavity and is used to close the first air outlet or the second air outlet.

[0010] A gas-operated button is movably disposed in the second cavity, and one end is connected to the valve core;

[0011] A switching device, comprising a switching push rod sleeved on one end of the valve core and a locking member cooperating with the switching push rod, wherein the locking member is rotatably disposed in the third cavity and has at least two limiting grooves with different concavities at the position where it abuts the switching push rod;

[0012] A switching pin is movably disposed within the inner cavity of the valve core, and a reset device is provided on one side.

[0013] In the above technical solution, an O-ring is fitted on the valve core.

[0014] In the above technical solution, a sealing ring is fitted on the gas push button.

[0015] In the above technical solution, the reset device is a reset spring.

[0016] In the above technical solution, a bearing is sleeved on one end of the locking member.

[0017] In the above technical solution, limit protrusions are provided on both sides of the switching push rod, and a limit through hole is provided on the valve body to cooperate with the limit protrusions.

[0018] III. Beneficial Effects

[0019] Compared with the prior art, this utility model has the following advantages: This utility model does not require electromagnets or human power, and controls the gas flow direction by opening and closing the gas flow rate, making it more suitable for automated control systems. At the same time, it can be used as a reversing valve under extreme conditions where electricity is unavailable. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0021] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0022] Figure 3 This is a schematic diagram of the exploded structure of this utility model.

[0023] In the diagram: 1 is the valve body, 10 is the first chamber, 11 is the second chamber, 12 is the third chamber, 100 is the first air outlet, 101 is the second air outlet, 1000 is the first air inlet, 1001 is the conveying channel, 2 is the valve core, 20 is the O-ring, 3 is the gas push button, 30 is the sealing ring, 4 is the switching device, 40 is the switching push rod, 41 is the locking element, 42 is the limiting groove, 400 is the limiting protrusion, 401 is the limiting through hole, 410 is the bearing, 5 is the switching pin, and 6 is the reset device. Detailed Implementation

[0024] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but should not be used to limit the scope of this utility model.

[0025] Please see Figure 1-3 This utility model provides an automatic reversing valve, including a valve body 1. A first cavity 10 is provided in the middle of the valve body 1. A second cavity 11 and a third cavity 12 communicating with the first cavity 10 are respectively provided at both ends of the first cavity 10. A first air inlet 1000 communicating with the first cavity 10 and the outside is provided on the valve body 1. One side of the first air inlet 1000 is connected to the second cavity 11 through a conveying channel 1001. A first air outlet 100 and a second air outlet 101 communicating with the outside are provided at both ends of the first cavity 10.

[0026] Valve core 2, which is movably disposed in the inner cavity of the first cavity 10 and is used to close the first air outlet 100 or the second air outlet 101;

[0027] Gas-driven button 3, which is movably disposed in the second cavity 11 and one end is connected to the valve core 2;

[0028] The switching device 4 includes a switching push rod 40 sleeved on one end of the valve core 2 and a locking member 41 that cooperates with the switching push rod 40. The locking member 41 is rotatably disposed in the third cavity 12, and at least two limiting grooves 42 with different concavities are provided at the position where it abuts the switching push rod 40.

[0029] The switching pin 5 is movably disposed in the inner cavity of the valve core 2, and a reset device 6 is provided on one side.

[0030] In the above structure, gas enters the first chamber through the first air inlet and simultaneously flows to the second chamber through the delivery channel. The gas flowing into the second chamber pushes a gas push button, which is movable inside, to move towards the first chamber. The gas push button drives the valve core to move simultaneously, and the switching push rod on the other side of the valve core moves to abut against the locking element it works with. The switching push rod moves to a shallow limiting groove on the locking element, and the valve core blocks the second air outlet. The airflow that flows into the first chamber through the delivery channel is discharged through the first air outlet. When gas no longer flows in, the reset device drives the valve core and the switching device to reset, and gas is introduced again through the first air inlet, driving the gas push button to move. The valve core drives the switching push rod to move to a deeper limiting groove on the locking element, and the valve core blocks the first air outlet. Gas enters the first chamber through the delivery channel and is discharged through the second air outlet. The whole system is gas-controlled, eliminating the need for manual operation or electric drive to change the gas flow direction. This reduces labor costs, makes it more suitable for automation, and allows operation even in extreme situations where electricity is unavailable.

[0031] Specifically, an O-ring 20 is fitted on the valve core 2. The O-ring serves as a seal to prevent gas leakage when the reversing valve is in use.

[0032] Specifically, a sealing ring 30 is fitted on the gas push button 3. The sealing ring can fit into the second cavity to seal and prevent gas leakage.

[0033] Specifically, the reset device 6 is a reset spring. The reset spring has a stable and strong rebound force, which enables the equipment to maintain a stable reset state during long-term use. At the same time, the reset spring has a simple structure and low manufacturing cost.

[0034] Specifically, a bearing 410 is sleeved on one end of the locking member 41. The bearing provides overload protection for the locking member and reduces friction and wear generated during the rotation of the locking member through its excellent rolling performance, thereby extending the service life of the overall equipment.

[0035] Specifically, the switching push rod 40 is provided with limit protrusions 400 on both sides, and the valve body 1 is provided with limit through holes 401 that cooperate with the limit protrusions 400. The cooperation of the limit protrusions and the limit through holes can play a guiding role and prevent the position of the switching push rod from shifting.

[0036] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. An automatic reversing valve, characterized in that, include: A valve body (1) is provided with a first cavity (10) in the middle of the valve body (1). A second cavity (11) and a third cavity (12) communicating with the first cavity (10) are respectively provided at both ends of the first cavity (10). A first air inlet (1000) communicating with the first cavity (10) and the outside is provided on the valve body (1). One side of the first air inlet (1000) is connected to the second cavity (11) through a conveying channel (1001). A first air outlet (100) and a second air outlet (101) communicating with the outside are provided at both ends of the first cavity (10). A valve core (2) is movably disposed in the inner cavity of the first cavity (10) and is used to close the first air outlet (100) or the second air outlet (101). Gas push button (3), the gas push button (3) is movably disposed in the second cavity (11), and one end is connected to the valve core (2); The switching device (4) includes a switching push rod (40) sleeved on one end of the valve core (2) and a locking member (41) cooperating with the switching push rod (40). The locking member (41) is rotatably disposed in the third cavity (12), and at least two limiting grooves (42) with different concavities are provided at the position where it abuts against the switching push rod (40). The switching pin (5) is movably disposed in the inner cavity of the valve core (2) and a reset device (6) is provided on one side.

2. An automatic reversing valve as described in claim 1, characterized in that: An O-ring (20) is fitted onto the valve core (2).

3. An automatic reversing valve as described in claim 1, characterized in that: A sealing ring (30) is fitted onto the gas-driven button (3).

4. An automatic reversing valve as described in claim 1, characterized in that: The reset device (6) is a reset spring.

5. An automatic reversing valve as described in claim 1, characterized in that: One end of the locking member (41) is fitted with a bearing (410).

6. An automatic reversing valve as described in claim 1, characterized in that: The switching push rod (40) is provided with limit protrusions (400) on both sides, and the valve body (1) is provided with a limit through hole (401) that cooperates with the limit protrusions (400).

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