Filtering device for the intake and exhaust of a pneumatic actuator

Abstract

A kind of filtering device of pneumatic actuator in and out gas, including first check valve, gas filter, second check valve;In and out gas logic as follows: when pneumatic valve action, pneumatic actuator's breathing hole, need to exhale, first check valve opens, second check valve closes, and exhale by air passage;When pneumatic valve action, pneumatic actuator's breathing hole inhale, first check valve closes, second check valve opens, and air is filtered after passing through gas filter, enters pneumatic actuator.Using the above structure, can avoid the filter screen of pneumatic actuator breathing hole, because of dust in air, oil dirt is much, after long running time, solidifies on the valve breathing hole, and causes the valve action failure;Also avoid the pneumatic actuator jam caused by dust into pneumatic actuator.

Description

Technical Field

[0001] This utility model belongs to the field of pneumatic valves, and specifically relates to a filtration device for the gas entering and exiting a pneumatic actuator. Background Technology

[0002] In industrial production, some pneumatic actuators operate in dusty, humid, or oily environments for extended periods. During the process of air entering and exiting the actuator through the breather, internal lubricating oil is often expelled along with the air. Water mist or dust in the air can also enter the actuator through the breather. Previously, pneumatic actuator manufacturers installed filters on the breather for filtration. Under normal operating conditions, the valve could operate normally. However, in dusty environments, as grease accumulates on the filter, the adhering dust and grease solidify and form scale on the filter screen, blocking the actuator's air passages and ultimately causing the valve to malfunction. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a filtration device for the gas entering and exiting a pneumatic actuator, which can avoid the valve failure caused by the accumulation and solidification of dust and oil in the air on the valve's breather after long-term operation due to the filter screen of the pneumatic actuator's breather. It also avoids the pneumatic actuator jamming caused by dust entering the pneumatic actuator, and solves the problem of dust and grease buildup on the breather after long-term operation.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A gas filtration device for a pneumatic actuator includes a first check valve, a second check valve, and a gas filtration device. The first check valve and the second check valve are connected to the pneumatic actuator via a three-way connector and an air pipe. The inlet end of the first check valve is connected to a gas source, and the outlet end of the second check valve is connected to the gas filtration device. Preferably, both the first check valve and the second check valve are mechanical check valves.

[0005] Preferably, the gas filtration device is filled with a filterable filler.

[0006] Preferably, the filter filler is degreased cotton or sponge, used to intercept dust and oil in the intake airflow.

[0007] Preferably, the three-way connector is DN10 and is used to divide the gas path into two paths to connect to the first check valve and the second check valve respectively.

[0008] Preferably, the device also includes a quick connector for connecting the air hose to the pneumatic actuator. The quick connector is DN10 and is used to connect the device to the breather port of the pneumatic actuator.

[0009] Preferably, the air intake and exhaust logic of the device is as follows: when the pneumatic valve is activated and the pneumatic actuator needs to exhale, the first one-way valve opens and the second one-way valve closes, and the gas is discharged outward through the air passage; When the pneumatic valve operates, and the pneumatic actuator needs to draw air in through its breather, the first check valve closes and the second check valve opens, allowing air to enter the pneumatic actuator after being filtered by the gas filter.

[0010] The present invention can achieve the following beneficial effects: This device incorporates a gas filter in series in the air intake path, filled with high-efficiency filter media such as degreased cotton and sponge. This filter precisely intercepts impurities such as dust and water mist in the air. Before the air enters the pneumatic actuator, impurities are filtered and removed, preventing dust from adhering to moving parts (such as pistons and seals) after entering the actuator. This effectively reduces actuator jamming and wear caused by dust friction, extends the actuator's service life, and lowers equipment maintenance frequency and parts replacement costs. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] In the diagram: First check valve 1, second check valve 2, gas filter 3, pneumatic actuator 4, tee connector 5, quick connector 6. Detailed Implementation

[0013] Preferred solutions include Figure 1 As shown, a gas filtration device for a pneumatic actuator includes a first one-way valve 1, a gas filter 3, and a second one-way valve 2. The gas inlet and outlet logic is as follows: When the pneumatic valve actuates and the pneumatic actuator 4 needs to exhale through its breather, the first one-way valve 1 opens and the second one-way valve 2 closes, allowing air to exhale through the air passage; when the pneumatic valve actuates and the pneumatic actuator 4 draws in through its breather, the first one-way valve 1 closes and the second one-way valve 2 opens, allowing air to enter the pneumatic actuator 4 after being filtered by the gas filter 3. This structure avoids the valve malfunction caused by dust and oil accumulating and solidifying on the breather after prolonged operation due to high air pollution levels; it also prevents the pneumatic actuator 4 from jamming due to dust entering the actuator.

[0014] The above-mentioned device is achieved by switching the gas inlet and outlet channels, with clean gas entering and exiting the pneumatic actuator 4.

[0015] The above-mentioned device requires the cooperation of the first one-way valve 1 and the second one-way valve 2 to achieve gas passage switching.

[0016] The above-mentioned device requires that when the pneumatic valve is activated and the pneumatic actuator 4 needs to exhale, the first one-way valve 1 opens and the second one-way valve 2 closes, allowing air to be exhaled through the airway.

[0017] When the pneumatic valve is activated and the pneumatic actuator 4 draws air in through its vent, the first check valve 1 closes and the second check valve 2 opens. The air then passes through the gas filter 3 and enters the pneumatic actuator 4.

[0018] The gas filtration device 3 described above is filled with degreased cotton or sponge and other filter fillers, which can be replaced periodically; Example: like Figure 1 As shown, a gas filtration device for a pneumatic actuator includes a first one-way valve 1, a gas filter 3, and a second one-way valve 2. The gas inlet and outlet logic is as follows: When the pneumatic valve actuates and the pneumatic actuator 4 needs to exhale through its breather, the first one-way valve 1 opens and the second one-way valve 2 closes, allowing air to exhale through the air passage; when the pneumatic valve actuates and the pneumatic actuator 4 draws in through its breather, the first one-way valve 1 closes and the second one-way valve 2 opens, allowing air to enter the pneumatic actuator 4 after being filtered by the gas filter 3. This structure avoids the valve malfunction caused by dust and oil accumulating and solidifying on the breather after prolonged operation due to high air pollution levels; it also prevents the pneumatic actuator 4 from jamming due to dust entering the actuator.

[0019] Working principle: When the pneumatic valve is activated and the pneumatic actuator 4 needs to exhale, the first one-way valve 1 opens and the second one-way valve 2 closes, allowing air, which may contain lubricating oil, to exhale through the air passage. When the pneumatic valve is activated and the pneumatic actuator 4 needs to inhale, the first one-way valve 1 closes and the second one-way valve 2 opens, allowing clean air to enter the pneumatic actuator 4 after being filtered by the gas filter device 3. In the preferred embodiment, the device is connected to the valve breather port using a quick DN10 connector.

[0020] In the preferred embodiment, the device uses a DN10 tee connector to divide the gas path into two paths.

[0021] In the preferred embodiment, when the pneumatic valve is activated and the pneumatic actuator 4 needs to exhale, the DN10 first check valve 1 opens and the DN10 second check valve 2 closes, allowing air to be exhaled through the air passage.

[0022] In the preferred configuration, when the pneumatic actuator 4 draws air in through its vent hole, the first one-way valve 1 with a diameter of DN10 closes, and the second one-way valve 2 with a diameter of DN25 opens. The air then enters the pneumatic actuator 4 after being filtered by the gas filter device 3 with a pipe diameter of DN25.

[0023] In the preferred embodiment, the gas filter device 3 of DN25 is filled with a sponge filter material, which can be replaced periodically.

[0024] The working principle of this utility model is a gas filtration device for a pneumatic actuator, including a first one-way valve 1, a gas filter device 3, and a second one-way valve 2. The gas inlet and outlet logic is as follows: When the pneumatic valve is activated and the pneumatic actuator 4 needs to exhale through its breather, the first one-way valve 1 opens and the second one-way valve 2 closes, allowing air to exhale through the air passage; when the pneumatic valve is activated and the pneumatic actuator 4 needs to draw in air through its breather, the first one-way valve 1 closes and the second one-way valve 2 opens, allowing air to enter the pneumatic actuator 4 after being filtered by the gas filter device 3. This structure avoids the valve malfunction caused by dust and oil accumulating and solidifying on the breather after prolonged operation due to high air pollution levels; it also prevents the pneumatic actuator 4 from jamming due to dust entering the actuator.

[0025] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A filtration device for the gas entering and exiting a pneumatic actuator, characterized in that, It includes a first check valve (1), a second check valve (2) and a gas filter device (3); the first check valve (1) and the second check valve (2) are connected to the pneumatic actuator (4) through a three-way connector (5) and an air pipe. The air inlet of the first check valve (1) is connected to the air source, and the air outlet of the second check valve (2) is connected to the gas filter device (3).

2. The gas filtration device for the pneumatic actuator according to claim 1, characterized in that, Both the first check valve (1) and the second check valve (2) are mechanical check valves.

3. The gas filtration device for the pneumatic actuator according to claim 1, characterized in that, The gas filtration device (3) is filled with a filterable filler.

4. The gas filtration device for the pneumatic actuator according to claim 3, characterized in that, The filter filler is degreased cotton or sponge, used to intercept dust and oil in the intake airflow.

5. The gas filtration device for the pneumatic actuator according to claim 1, characterized in that, The three-way connector (5) is DN10 and is used to divide the gas path into two paths to connect to the first check valve (1) and the second check valve (2) respectively.

6. The gas filtration device for the pneumatic actuator according to claim 1, characterized in that, It also includes a quick connector (6) for connecting the air tube to the pneumatic actuator (4); the quick connector (6) is DN10 and is used to connect the device to the breathing port of the pneumatic actuator (4).

7. The gas filtration device for the pneumatic actuator according to claim 1, characterized in that, The air intake and exhaust logic of the device is as follows: when the pneumatic valve is activated and the pneumatic actuator (4) needs to exhale, the first one-way valve (1) opens and the second one-way valve (2) closes, and the gas is discharged outward through the air passage; When the pneumatic valve is activated, and the pneumatic actuator (4) needs to draw air in through its vent hole, the first check valve (1) closes and the second check valve (2) opens. The air then enters the pneumatic actuator (4) after being filtered by the gas filter (3).

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