CN211975996U - Self-control switch vacuum valve - Google Patents

Abstract

The utility model discloses an automatic switch vacuum valve, which comprises a screw gland (1); a vacuum valve casing (2) is provided with a power supply lead wiring board and a thin fixed contact piece assembly (3), a movable contact piece (4) which is long left and right and provided with a strip-shaped concave spring seat, a strip-shaped compression spring (5), a vacuum pump lead wiring board and a thin fixed contact piece assembly (6), a conical valve body (7), a thin convex circular cover (7-1) and a convex contact (7-2) are assembled to form the self-control switch vacuum valve, when a vacuum pump and motor assembly (8) vacuumizes a vacuum tank assembly (9) to a set vacuum value, the thin convex circular cover (7-1) can move downwards under atmospheric pressure, the movable contact piece (4) which is long left and right and provided with the strip-shaped concave spring seat is separated from and contacts with the vacuum thin fixed contact pieces, the vacuum pump and the motor assembly (8) can stop working automatically when power is cut off, power consumption is reduced, and the manufacturing cost of the vacuum valve.

Description

Self-control switch vacuum valve

Technical Field

The utility model relates to a self-control switch vacuum valve that ability automatic control vacuum pump shut down.

Background

The existing production can automatically control the stop of the vacuum pump by adopting an electromagnetic valve which consumes electric energy. The "vacuum valve for automatically controlling the stop of a vacuum pump" (patent numbers 2019221879657 and 2019112535024), which I claim 12, 9 and 9 in 2019, is complicated in structure.

Disclosure of Invention

The utility model aims at: the self-control switch vacuum valve has no power consumption and can automatically control the vacuum pump to be powered off and stopped in a vacuum environment.

The technical scheme of the utility model is that: the vacuum pump comprises an internal thread gland, a vacuum valve shell, a power supply lead wiring board, a thin fixed contact piece assembly, a movable contact piece with a strip-shaped concave spring seat and a left and right length, a strip-shaped compression spring, a vacuum pump lead wiring board, a thin fixed contact piece assembly and a conical valve body; processing the center of a vacuum valve casing (2) made of plastic with strength into a conical blind inner hole (2-2), processing an upper excircle on the vacuum valve casing (2) into an external thread (2-1), processing the right end of the middle part on the vacuum valve casing (2) into a right exhaust pipe (2-3), processing the left end of the middle part on the vacuum valve casing (2) into a left exhaust pipe (2-5), and manufacturing the lower part of the inner hole on the vacuum valve casing (2) into a convex rectangular spring seat (2-4) with the length left and right; a conical valve body (7) which is concentric with the conical blind inner hole (2-2) and is in sealing fit with the conical blind inner hole is made of elastic rubber, the lower part of the conical valve body (7) is concentrically processed into a convex contact (7-2), and the upper part of the conical valve body (7) is concentrically processed into a thin convex cover (7-1); uniformly distributing a power supply lead wiring board and thin fixed contact assembly (3) and a vacuum pump lead wiring board and thin fixed contact assembly (6) on the right and left concentrically, and sealing and installing the power supply lead wiring board and thin fixed contact assembly on two sides of the middle lower part of a vacuum valve shell (2) by using sealing glue; the power supply lead wiring board and the wiring board of the thin fixed contact assembly (3) are arranged at the right outer side of the vacuum valve casing (2), the thin fixed contact is arranged at the right inner side of the vacuum valve casing (2), the wiring board of the vacuum pump lead wiring board and the thin fixed contact assembly (6) is arranged at the left outer side of the vacuum valve casing (2), and the thin fixed contact is arranged at the left inner side of the vacuum valve casing (2); the strip-shaped compression spring (5) is concentrically and tightly matched and arranged in the left and right long rectangular spring seats (2-4) at the lower part of the inner hole of the vacuum valve shell (2); the movable contact spring (4) with a strip-shaped concave spring seat and the left and right long is kept away from two thin fixed contact pieces of a power supply lead wiring board and thin fixed contact piece assembly (3) and a vacuum pump lead wiring board and thin fixed contact piece assembly (6), the strip-shaped compression spring (5) is compressed downwards, the movable contact spring (4) with the strip-shaped concave spring seat and the left and right long is made to be lower than the two thin fixed contact pieces, then the movable contact spring (4) with the strip-shaped concave spring seat and the left and right long is rotated, the upper part of the strip-shaped compression spring (5) is made to concentrically fall into the strip-shaped concave spring seat, and the movable contact pieces on the two sides of the movable contact spring (4) with the strip-shaped concave spring seat and the two thin fixed contact pieces of the power supply lead wiring board and thin fixed contact piece assembly; after a processed conical valve body (7) is concentrically arranged in a vacuum valve casing (2) from top to bottom, a processed internal thread gland (1) is concentrically pressed on a thin convex circular cover (7-1) and is concentrically sleeved on an external thread (2-1) on the vacuum valve casing (2) to be screwed, so that the thin convex circular cover (7-1) protrudes upwards by more than 1 mm, the lower plane of a convex contact (7-2) of the conical valve body (7) is separated from the upper plane of a movable contact piece (4) with a strip-shaped concave spring seat and is longer left and right by more than 1 mm, and simultaneously, a right exhaust pipe (2-3) is communicated with a left pumped-off pipe (2-5). The utility model has the advantages that: the vacuum pump can be automatically controlled to stop, the power consumption of the vacuum pump is reduced, and the manufacturing cost of the automatic switch vacuum valve is reduced.

Drawings

Fig. 1 is a schematic diagram showing a closed cross section of a contact, fig. 2 is a schematic diagram showing a separated cross section of a contact, and fig. 3 is a schematic diagram showing an operation of the present invention installed in a vacuum pumping system.

The part numbers in the figures are as follows: a screw gland (1); the vacuum pump comprises a vacuum valve shell (2), external threads (2-1), a conical blind inner hole (2-2), a right air exhaust pipe (2-3), a rectangular spring seat (2-4) and a left air exhaust pipe (2-5); a power supply lead wiring board and a thin fixed contact assembly (3); a movable contact spring (4) with a strip-shaped concave spring seat and long left and right; a strip-shaped compression spring (5); a vacuum pump lead wire wiring board and a thin fixed contact assembly (6); a conical valve body (7), a thin convex circular cover (7-1) and a convex contact (7-2); a vacuum pump and motor assembly (8); a vacuum tank assembly (9).

Detailed Description

In the embodiment shown in the figures 1, 2 and 3, the screw gland (1), the vacuum valve shell (2), the power supply lead wire wiring board and the thin fixed contact piece assembly (3), the movable contact piece (4) with the strip-shaped concave spring seat and the left and right long, the strip-shaped compression spring (5), the vacuum pump lead wire wiring board and the thin fixed contact piece assembly (6), the conical valve body (7) and the like are assembled into the self-control switch vacuum valve capable of automatically controlling the vacuum pump to stop, the right exhaust tube (2-3) is concentrically and hermetically connected with the exhaust tube of the vacuum pump and motor assembly (8), the left exhaust tube (2-5) is hermetically connected with the exhaust tube of the vacuum tank assembly (9), then the vacuum pump lead wire and the thin fixed contact piece assembly (6) are connected with one of the vacuum pump and the motor assembly (8), and finally the power supply lead wire wiring board and the thin fixed contact piece assembly (3) are connected with the live wire of the power supply, the other phase of the vacuum pump and motor assembly (8) is connected with the power supply zero line, at the moment, the power switch of the vacuum pump and motor assembly (8) is turned on to vacuumize the vacuum tank assembly (9), when the set vacuum value is pumped, the thin convex circular cover (7-1) on the conical valve body (7) is pressed downwards by the atmospheric pressure, so that the conical valve body (7) moves downwards simultaneously to close the air passages of the right air exhaust pipe (2-3) and the left air exhaust pipe (2-5), the convex contact (7-2) of the conical valve body (7) is pushed downwards, the movable contact spring (4) with the strip-shaped concave spring seat and the left and right lengths is separated from the power supply lead wiring board and the thin fixed contact assembly (3) and the vacuum pump lead wiring board and the two thin fixed contact pieces on the thin fixed contact assembly (6), and the vacuum pump and the motor assembly (8) are powered off to automatically stop the vacuum pumping; when the air pressure of the vacuum tank assembly (9) is increased to 10000Pa after air enters, the elastic force of the thin convex circular cover (7-1) which is gradually lifted upwards and the elastic force of the strip-shaped compression spring (5) are added, so that the conical valve body (7) gradually moves upwards, the movable contact piece (4) which is provided with the strip-shaped concave spring seat and is long at the left and the right gradually contacts the two thin fixed contact pieces, and simultaneously, the vacuum pump and the motor assembly (8) are started and vacuumized for the vacuum tank assembly (9).

Claims (4)

1. The utility model provides a self control switch vacuum valve, includes internal thread gland (1), vacuum valve casing (2), power lead wire wiring board and thin fixed contact assembly (3), has long movable contact (4) about the concave spring holder of rectangular shape, rectangular shape compression spring (5), vacuum pump lead wire wiring board and thin fixed contact assembly (6), conical valve body (7), characterized by: processing the center of a vacuum valve casing (2) made of plastic with strength into a conical blind inner hole (2-2), processing an upper excircle on the vacuum valve casing (2) into an external thread (2-1), processing the right end of the middle part on the vacuum valve casing (2) into a right exhaust pipe (2-3), processing the left end of the middle part on the vacuum valve casing (2) into a left exhaust pipe (2-5), and manufacturing the lower part of the inner hole on the vacuum valve casing (2) into a convex rectangular spring seat (2-4) with the length left and right; a conical valve body (7) which is concentric with the conical blind inner hole (2-2) and is in sealing fit with the conical blind inner hole is made of elastic rubber, the lower part of the conical valve body (7) is concentrically processed into a convex contact (7-2), and the upper part of the conical valve body (7) is concentrically processed into a thin convex cover (7-1); uniformly distributing a power supply lead wiring board and thin fixed contact assembly (3) and a vacuum pump lead wiring board and thin fixed contact assembly (6) on the right and left concentrically, and sealing and installing the power supply lead wiring board and thin fixed contact assembly on two sides of the middle lower part of a vacuum valve shell (2) by using sealing glue; the strip-shaped compression spring (5) is concentrically and tightly matched and arranged in the left and right long rectangular spring seats (2-4) at the lower part of the inner hole of the vacuum valve shell (2); the movable contact spring (4) with the strip-shaped concave spring seat and the left and right long parts avoids two thin fixed contact pieces of a power supply lead wire wiring board and thin fixed contact piece assembly (3) and a vacuum pump lead wire wiring board and thin fixed contact piece assembly (6), the strip-shaped compression spring (5) is compressed downwards, the movable contact spring (4) with the strip-shaped concave spring seat and the left and right long parts is made to be lower than the two thin fixed contact pieces, then the movable contact spring (4) with the strip-shaped concave spring seat and the left and right long parts is rotated, and the upper part of the strip-shaped compression spring (5) is made to concentrically; after the processed conical valve body (7) is concentrically arranged in the vacuum valve casing (2) from top to bottom, the processed internal thread gland (1) is concentrically pressed on the thin convex circular cover (7-1) and is concentrically sleeved on the external thread (2-1) on the vacuum valve casing (2) to be screwed down.

2. The self-controlling switching vacuum valve according to claim 1, wherein: the power supply lead wiring board and the wiring board of the thin fixed contact piece assembly (3) are arranged at the right outer side of the vacuum valve casing (2), and the thin fixed contact piece is arranged at the right inner side of the vacuum valve casing (2); the wiring board of the vacuum pump lead wire and the wiring board of the thin fixed contact piece assembly (6) are arranged at the left outer side of the vacuum valve casing (2), and the thin fixed contact piece is arranged at the left inner side of the vacuum valve casing (2).

3. The self-controlling switching vacuum valve according to claim 1, wherein: the movable contact pieces on two sides of the movable contact piece (4) with the strip-shaped concave spring seat and the left and right long movable contact pieces are contacted with two thin fixed contact pieces of a power supply lead wire wiring board and thin fixed contact piece assembly (3), a vacuum pump lead wire wiring board and a thin fixed contact piece assembly (6).

4. The self-controlling switching vacuum valve according to claim 1, wherein: the thin convex round cover (7-1) protrudes upwards by more than 1 mm, the lower plane of the convex contact (7-2) of the conical valve body (7) is more than 1 mm away from the upper plane of the movable contact piece (4) with the strip-shaped concave spring seat which is long left and right, and simultaneously the right air exhaust pipe (2-3) is communicated with the left air exhaust pipe (2-5).

Images