Vacuum drain valve

Abstract

The utility model discloses a vacuum drain valve which comprises a valve body, a side opening is formed in the valve body and connected with a suction cup, a valve cavity and an eccentric hole are formed in the valve body, the eccentric hole is communicated with the side opening and the valve cavity, and a one-way valve clack is arranged at the lower end of the valve cavity. Due to the design of the eccentric hole, high-speed rotating motion of mixed airflow is achieved, gas-liquid separation and unique one-way valve clack are achieved under the condition that centrifugal force of gas and centrifugal force of liquid are different and circular motion is the same in speed, and the special purposes of no leakage during vacuumizing and drainage during vacuum damage are achieved.

Description

Technical Field

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

[0002] Vacuum generators and vacuum pumps are indispensable core components in the field of negative pressure adsorption in the automation industry. The application environment of the suction cups of the rear-end actuators is complex and changeable, including high-dust environments, high-cutting fluid environments, etc.

[0003] In response to the environment with high cutting fluid, we proposed a vacuum drain valve to protect the front-end vacuum generator and vacuum pump from corrosion by cutting fluid. Utility Model Content

[0004] The purpose of the utility model is to provide a vacuum drain valve to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a vacuum drainage valve, comprising: a valve body, the valve body is provided with a side opening, the side opening is connected to the suction cup, a valve cavity and an eccentric hole are provided in the valve body, the eccentric hole connects the side opening and the valve cavity, and a one-way valve disc is provided at the lower end of the valve cavity.

[0006] Preferably, a valve external front end is provided at the upper end of the valve body, and the valve external front end is connected to a unit such as a vacuum generator or a vacuum pump.

[0007] Preferably, the lower end of the external front end of the valve is connected with a straw, and the straw is inserted into the valve cavity from top to bottom.

[0008] Preferably, a valve seat is fixedly provided at the lower end of the valve body, and a bottom opening is penetrated through the valve seat in the up and down directions.

[0009] Preferably, a plug is fixedly provided at the lower end of the valve cavity, and the plug is provided with a through hole, which communicates the valve cavity and the bottom opening.

[0010] Preferably, the one-way valve flap is sealed below the through hole.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The design of the eccentric hole allows the mixed airflow to achieve high-speed rotation. By utilizing the different centrifugal forces of gas and liquid, the gas-liquid separation is achieved under the same speed of circular motion.

[0013] 2. The unique one-way valve disc achieves the special purpose of no leakage when vacuuming and drainage when the vacuum is broken. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a side sectional view of the utility model;

[0016] Figure 3 It is a top sectional view of the utility model.

[0017] In the figure: 1. valve body; 11. side opening; 12. valve chamber; 13. eccentric hole; 14. valve seat; 141. bottom opening; 2. valve external front end; 21. suction tube; 3. plug; 31. through hole; 4. one-way valve disc. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-3 The utility model provides a technical solution: a vacuum drain valve, comprising: a valve body 1, a valve external front end 2 is provided at the upper end of the valve body 1, the valve external front end 2 is connected to a vacuum generator or a vacuum pump and other units, and a suction pipe 21 is connected to the lower end of the valve external front end 2;

[0020] A valve seat 14 is fixedly provided at the lower end of the valve body 1, and a bottom opening 141 is formed through the valve seat 14 in the vertical direction;

[0021] The valve body 1 is provided with a side opening 11, the side opening 11 is connected to the suction cup, and the valve body 1 is provided with a valve cavity 12 and an eccentric hole 13, the eccentric hole 13 is connected with the side opening 11 and the valve cavity 12;

[0022] The suction tube 21 is inserted into the valve chamber 12 from top to bottom;

[0023] A plug 3 is fixedly provided at the lower end of the valve cavity 12, and a through hole 31 is formed in the plug 3. The through hole 31 communicates with the valve cavity 12 and the bottom opening 141;

[0024] A one-way valve flap 4 is sandwiched between the valve seat 14 and the valve body 1 , and the one-way valve flap 4 blocks the bottom of the through hole 31 .

[0025] Working principle: In the suction state, when the vacuum generator or vacuum pump unit connected to the front end 2 of the valve is turned on, before the suction cup stably adsorbs the product to be adsorbed, the side opening 11 will continue to suck in the mixed gas formed by air and cutting fluid. When the mixed gas enters the valve cavity 12, since the eccentric hole 13 is arranged in the valve body 1, the mixed gas will enter the central suction pipe 21 in a manner of rotating around the valve cavity 12. However, due to the centrifugal force, the cutting fluid in the mixed gas will be thrown around the inner hole wall by the centrifugal force, and will flow down along the hole wall to the top of the plug 3 due to gravity. At the same time, the one-way valve disc 4 is in a state of closing the plug 3 due to the atmospheric pressure during suction, so the purpose of water-gas separation is achieved, and a vacuum-free state is achieved;

[0026] When the product adsorbed by the suction cup needs to be released in the vacuum breaking state, the vacuum adsorption of the vacuum generator or vacuum pump unit connected to the front end 2 of the valve is closed, and the vacuum breaking is opened. Compressed air enters the valve cavity 12 from above. Part of the compressed air forces the one-way valve flap 4 to open and discharge the cutting fluid, and the other part breaks the vacuum at the suction cup through the side opening 11, thereby achieving the purpose of releasing the product.

[0027] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vacuum drain valve, comprising: The valve body (1) is characterized in that: the valve body (1) is provided with a side opening (11), the side opening (11) is connected to the suction cup, a valve cavity (12) and an eccentric hole (13) are provided in the valve body (1), the eccentric hole (13) is connected to the side opening (11) and the valve cavity (12), and a one-way valve flap (4) is provided at the lower end of the valve cavity (12).

2. A vacuum drain valve according to claim 1, characterized in that: The upper end of the valve body (1) is provided with a valve external front end (2), and the valve external front end (2) is connected to a vacuum generator or a vacuum pump unit.

3. A vacuum drain valve according to claim 2, characterized in that: The lower end of the valve external front end (2) is connected to a suction tube (21), and the suction tube (21) is inserted into the valve cavity (12) from top to bottom.

4. A vacuum drain valve according to claim 1, characterized in that: A valve seat (14) is fixedly provided at the lower end of the valve body (1), and a bottom opening (141) is provided through the valve seat (14) in the up and down directions.

5. The vacuum drain valve according to claim 1, characterized in that: A plug (3) is fixedly provided at the lower end of the valve cavity (12), and the plug (3) is provided with a through hole (31), and the through hole (31) communicates with the valve cavity (12) and the bottom opening (141).

6. A vacuum drain valve according to claim 1, characterized in that: The one-way valve flap (4) is sealed below the through hole (31).

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