Automatic drainage valve of air compressor

Abstract

The utility model relates to the technical field of valves, in particular to an automatic drainage valve of an air compressor, which comprises an upper valve body and a lower valve body, a piston, a movable rod for mounting the piston and a power component for driving the movable rod to lift in the lower valve body are mounted in the upper valve body, a liquid inlet is formed in the side surface of the lower valve body, and a liquid outlet is formed in the bottom surface of the lower valve body; wherein the piston can seal the liquid outlet; conductive points are arranged on the inner side wall of the lower valve body and the outer wall of the movable rod, the conductive points on the side wall of the lower valve body are connected with a power source, the conductive points on the outer wall of the movable rod are connected with a power assembly, the power assembly is further connected with the power source through a timing mechanism, and the timing mechanism can control the power assembly to be communicated with the power source; a descaling liquid spray head is further installed at the bottom of the center of the piston and connected with a liquid supply box on the upper valve body through a descaling pipeline. The air compressor can be automatically drained, the sealing performance of the piston and the liquid outlet is improved, and the performance of the drainage valve is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of valves, and in particular, to an automatic drain valve for an air compressor. Background Art

[0002] An air compressor is a device used to compress gas. Currently, valves are installed in air compressors. Since water is generated after air storage, the valve needs to be frequently opened to drain the internal water, otherwise it will affect the normal use of the air compressor. However, the currently used valves are all manually controlled, which is rather troublesome to open and close back and forth. Moreover, the valve and the water pipe are only connected by threads, and are prone to loosening after long-term use, posing a risk of water leakage.

[0003] Chinese Patent CN213871119U discloses an automatic drain valve for an air compressor storage tank, including a valve body, a piston, and a spring. The drain valve further includes a housing, an iron core, a coil, an armature, a chute, and a spring. The iron core is fixed inside the housing, the housing is fixedly connected to the valve body, the coil is wound around the iron core on the outside, the armature is fixed on the piston, the piston slides in the valve body and is used to open and close the valve body, the piston is slidably arranged in the chute, the chute is arranged in the valve body, the spring is located between the iron core and the armature, and when the armature is adsorbed by the iron core, the spring is in a compressed state. The coil is connected to a PLC. This automatic drain valve is connected to the PLC. When the PLC sends a drainage message, the drain valve can act in a timely manner, avoiding manual labor and having a high drainage efficiency. In this application, automatic drainage is achieved through PLC control. However, a partition is provided between the liquid inlet and the liquid outlet of the lower valve body in this structure, and the liquid outlet is opened and closed by the piston. Scale is likely to accumulate in the cavities of the lower valve body and the piston after long-term use, affecting the sealing performance between the piston and the valve body. Summary of the Utility Model

[0004] In order to overcome the problems existing in the prior art, the present application provides an automatic drain valve for an air compressor.

[0005] The automatic drain valve for an air compressor provided by the present application adopts the following technical solutions:

[0006] An automatic drain valve for an air compressor, including an upper valve body and a lower valve body. A piston, a movable rod for installing the piston, and a power assembly for driving the movable rod to lift and lower in the lower valve body are installed in the upper valve body. A liquid inlet is provided on the side of the lower valve body, and a liquid outlet is provided on the bottom surface. The piston can seal the liquid outlet. Conductive points are provided on the inner side wall of the lower valve body and the outer wall of the movable rod. The conductive point on the side wall of the lower valve body is connected to a power source, the conductive point on the outer wall of the movable rod is connected to the power assembly, the power assembly is also connected to the power source through a timing mechanism, and the timing mechanism can control the connection between the power assembly and the power source. A descaling liquid spray head is further installed at the center bottom of the piston, and the descaling liquid spray head is connected to a liquid supply tank on the upper valve body through a descaling pipeline.

[0007] By adopting the above technical solution, the movable rod with a piston installed below the upper valve body rises and falls under the action of the power component. When the water in the lower valve body has not exceeded the height of the conductive point, the power component presses the piston against the liquid outlet, the drain valve closes, and the water in the lower valve body cannot be discharged. When the water in the lower valve body exceeds the height of the conductive point, the water energizes between the two conductive points on both sides. At this time, the power component is energized to move the movable rod with a piston upward, and the drain valve opens to discharge the water in the lower valve body. And the power component is also connected to the power supply through a timing mechanism. Even when the amount of water in the lower valve body is small and does not reach the height of the conductive point, it can also control the movable rod with a piston to rise and drain water regularly, avoiding the water staying in the lower valve body for a long time and affecting the normal use of the air compressor. A descaling liquid spray head is also installed at the center bottom of the piston. After the drain valve is used for a long time, the solution for removing scale in the liquid supply tank can be sprayed to the liquid outlet through it, avoiding affecting the sealing performance of the liquid outlet and the piston.

[0008] Preferably, the movable rod includes a base, a central rod installed at the center of the base, and an annular cover around it. The length of the central rod is greater than that of the annular cover, and the top of the central rod is slidably connected to the upper valve body. The power component includes an electromagnet installed at the bottom of the upper valve body and a spring sleeved on the central rod. The two ends of the spring are respectively connected to the upper valve body and the base.

[0009] Preferably, the annular cover includes an insulating main body and a metal ring at the top, and the metal ring corresponds to the electromagnet. The conductive points are located on the insulating main body below the annular cover.

[0010] Preferably, there is a gap between the top of the annular cover and the upper valve body when the piston at the bottom of the movable rod is sealed with the liquid outlet.

[0011] By adopting the above technical solution, the central rod installed on the base in the movable rod is used to sleeve the spring. Under the limiting action of the surrounding annular cover, when the electromagnet on the upper valve body is not energized, the spring can press the movable rod downward, so as to press the piston at the bottom of the movable rod against the liquid outlet for sealing. After the electromagnet is energized, it adsorbs the metal ring at the top of the annular cover, removes the piston at the bottom of the movable rod from the liquid outlet for drainage. And when draining water through the energization of the conductive points, the movable rod rises and the conductive points will be de-energized after drainage, so as to reset the seal between the piston and the liquid outlet.

[0012] Preferably, the conductive points on the annular cover and the conductive points on the inner side wall of the lower valve body are both located below the liquid inlet.

[0013] Preferably, the liquid outlet is an inverted frustum-shaped perforation, and the piston is in the shape of an inverted frustum that matches it.

[0014] Preferably, the height of the frustum-shaped perforation is greater than the height of the piston, the top diameter of the frustum-shaped perforation is greater than the outer diameter of the top of the piston, and the bottom diameter of the frustum-shaped perforation is less than the outer diameter of the bottom of the piston.

[0015] By adopting the above technical solution, the conductive points below the liquid inlet conduct the water in the lower valve body to drain the drain valve, and the piston and the liquid outlet are arranged in a matching frustum shape, which can facilitate the opening and closing between the two and ensure the performance of the drain valve.

[0016] Preferably, the descaling liquid spray head adopts a three-dimensional cleaning spray head, and the descaling pipeline penetrates through the central perforation of the central rod and is connected to the liquid supply tank installed on the upper valve body.

[0017] By adopting the above technical solution, the descaling liquid spray head adopts a three-dimensional cleaning spray head, which can evenly cover and spray the descaling liquid on the inner side wall of the lower valve body and the piston, ensuring the descaling effect and improving the sealing performance between the piston and the liquid outlet.

[0018] In summary, the present application includes at least one of the following beneficial technical effects:

[0019] 1. In the present application, the drain valve is opened for drainage by connecting the conductive points through the water in the lower valve body and energizing the electromagnet through the timing mechanism to connect to the power supply. It can drain water when the water reaches a certain height or drain water regularly, avoiding the formation of scale due to the long-term retention of water in the lower valve body, which affects the sealing performance between the piston and the valve body;

[0020] 2. The present application also provides a descaling spray head with three-dimensional cleaning at the bottom of the piston, which can evenly cover and spray the descaling liquid on the inner side wall of the lower valve body and the piston, ensuring the descaling effect, improving the sealing performance between the piston and the liquid outlet, and ensuring the performance of the drain valve. Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the overall structure of an automatic drain valve for an air compressor.

[0022] Description of the reference numerals: 1. Upper valve body; 11. Piston; 111. Descaling liquid spray head; 112. Descaling pipeline; 113. Liquid supply tank; 12. Moving rod; 121. Base; 122. Central rod; 1221. Central perforation; 123. Ring-shaped cover; 1231. Insulating body; 1232. Metal ring; 13. Power component; 131. Electromagnet; 132. Spring; 14. Timing mechanism; 2. Lower valve body; 21. Liquid inlet; 22. Liquid outlet; 3. Conductive point; 4. Power supply. Detailed Description of the Invention

[0023] The following will further describe the present application in detail Figure 1 with reference to the accompanying drawings.

[0024] The embodiment of the present application discloses an automatic drain valve for an air compressor.

[0025] Reference Figure 1 , an automatic drain valve for an air compressor, an upper valve body 1 and a lower valve body 2, a movable rod 12 with a piston 11 installed below the upper valve body 1 is raised and lowered under the action of a power assembly 13, when the water in the lower valve body 2 has not exceeded the height of the conductive point 3, the bottom of the spring 132 in the power assembly 13 abuts against the base 121 of the movable rod 12, and the inverted truncated cone-shaped piston 11 abuts against the truncated cone-shaped liquid outlet 22, the drain valve is closed, and the water in the lower valve body 2 cannot be discharged. When the water in the lower valve body 2 exceeds the height of the conductive point 3, the water will energize the conductive point 3 located on the inner side wall of the lower valve body 2 and the outer wall of the insulating main body 1231 of the annular cover 123 below the liquid inlet 21, and the electromagnet 131 will be energized at this time, and the electromagnet 131 will absorb the metal ring 1232 on the annular cover 123, and move the movable rod 12 with the piston 11 upward, and the center rod 122 at the center of the movable rod 12 will slide in the upper valve body 1, and the drain valve will open to discharge the water in the lower valve body 2. At the same time, the electromagnet 131 is also connected to the power supply 4 through the timing mechanism 14, and the timing mechanism 14 controls the electromagnet 131 to be energized according to a certain time interval, thereby controlling the movable rod 12 with the piston 11 to rise and drain at a timing. A descaling liquid spray head 111 is also installed at the central bottom of the piston 11. The descaling liquid spray head 111 adopts a three-dimensional cleaning spray head. After the drain valve has been used for a long time, the descaling solution in the liquid supply tank 113 can be transported by the descaling pipe 112 in the central through hole 1221 in the central rod 122 and sprayed to the liquid outlet 22. The descaling liquid can be evenly sprayed onto the inner wall of the lower valve body 2 and the piston 11, thereby ensuring the descaling effect, improving the sealing of the piston 11 and the liquid outlet 22, and avoiding affecting the sealing of the liquid outlet 22 and the piston 11.

[0026] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An automatic drain valve for an air compressor, comprising an upper valve body (1) and a lower valve body (2), characterized in that: The upper valve body (1) is provided with a piston (11), a movable rod (12) for installing the piston (11), and a power assembly (13) for driving the movable rod (12) to move up and down in the lower valve body (2); a liquid inlet (21) is provided on the side of the lower valve body (2), and a liquid outlet (22) is provided on the bottom, wherein the piston (11) can seal the liquid outlet (22); conductive points (3) are provided on the inner wall of the lower valve body (2) and on the outer wall of the movable rod (12), wherein the conductive points (3) on the side wall of the lower valve body (2) are provided. The conductive point (3) is connected to a power source (4), and the conductive point (3) on the outer wall of the movable rod (12) is connected to a power assembly (13). The power assembly (13) is also connected to the power source (4) via a timing mechanism (14), and the timing mechanism (14) is capable of controlling the connection between the power assembly (13) and the power source (4). A descaling liquid spray head (111) is also installed at the central bottom of the piston (11), and the descaling liquid spray head (111) is connected to a liquid supply tank (113) on the upper valve body (1) via a descaling pipe (112).

2. The automatic drain valve for air compressor according to claim 1, characterized in that: The movable rod (12) comprises a base (121), a center rod (122) installed at the center of the base (121) and an annular cover (123) around it, wherein the length of the center rod (122) is greater than the annular cover (123), and the top of the center rod (122) is slidably connected to the upper valve body (1), and the power assembly (13) comprises an electromagnet (131) installed at the bottom of the upper valve body (1) and a spring (132) sleeved on the center rod (122), wherein the two ends of the spring (132) are respectively connected to the upper valve body (1) and the base (121).

3. The automatic drain valve for air compressor according to claim 2, characterized in that: The annular cover (123) comprises an insulating body (1231) and a metal ring (1232) on the top, and the metal ring (1232) corresponds to the electromagnet (131), and the conductive point (3) is located on the insulating body (1231) below the annular cover (123).

4. The automatic drain valve for air compressor according to claim 3, characterized in that: When the piston (11) at the bottom of the movable rod (12) is sealed with the liquid outlet (22), a gap is provided between the top of the annular cover body (123) and the upper valve body (1).

5. The automatic drain valve for air compressor according to claim 4, characterized in that: The conductive point (3) on the annular cover body (123) and the conductive point (3) on the inner wall of the lower valve body (2) are both located below the liquid inlet (21).

6. The automatic drain valve for air compressor according to claim 5, characterized in that: The liquid outlet (22) is an inverted truncated cone-shaped perforation, and the piston (11) is in an inverted truncated cone shape that matches the perforation.

7. The automatic drain valve for air compressor according to claim 6, characterized in that: The height of the truncated cone-shaped perforation is greater than the height of the piston (11), the top diameter of the truncated cone-shaped perforation is greater than the top outer diameter of the piston (11), and the bottom diameter of the truncated cone-shaped perforation is smaller than the bottom outer diameter of the piston (11).

8. The automatic drain valve for air compressor according to claim 1, characterized in that: The descaling liquid spray head (111) is a three-dimensional cleaning spray head, and the descaling pipeline (112) passes through the central through hole (1221) of the central rod (122) and is connected to the liquid supply box (113) installed on the upper valve body (1).

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