CN217632815U

CN217632815U - Vacuum baffle inflation valve

Info

Publication number: CN217632815U
Application number: CN202221280150.9U
Authority: CN
Inventors: 冯思远; 冯思聪
Original assignee: Foshan Shunde Dinglian Intelligent Technology Co ltd
Current assignee: Foshan Shunde Dinglian Intelligent Technology Co ltd
Priority date: 2022-05-25
Filing date: 2022-05-25
Publication date: 2022-10-21
Anticipated expiration: 2032-05-25

Abstract

The utility model relates to the technical field of gas circuit control and discloses a vacuum baffle inflation valve, which comprises a valve body, a cylinder arranged at one end of the valve body, a first interface arranged at the other end of the valve body, a second interface arranged at the bottom of the valve body and an inflation inlet arranged on the valve body; when the vacuum pump cuts off the power supply and closes, the baffle on the cylinder drive piston rod cuts off first interface and second interface intercommunication, makes and is divided into inflation zone and negative pressure zone in the valve body, negative pressure zone and first interface intercommunication, inflation zone and second interface intercommunication, then the solenoid valve is in the closure state, and the case of solenoid valve descends for aerify filtering joint and inflation inlet intercommunication, atmosphere pass through the inflation inlet and get into the inflation zone, aerify to the pump chamber of vacuum pump, make the inside and outside pressure balance of pump chamber, prevented that pump oil from causing the damage to the vacuum pump because the backward flow of pressure difference, ensure the life of vacuum pump.

Description

Vacuum baffle inflation valve

Technical Field

The utility model relates to a gas circuit control technical field, in particular to vacuum baffle inflation valve.

Background

The existing general oil-sealed mechanical vacuum pump is used for realizing vacuum obtaining, if the vacuum pump is in a halt state for a long time, the vacuumizing pipeline is in a negative pressure state, pump oil reflows to the vacuumizing pipeline due to pressure difference, the pump oil not only pollutes a vacuum system in a countercurrent manner, but also generates a liquid impact phenomenon when entering a vacuum pump cavity from a vacuum pump air inlet when the vacuum pump is started next time, a rotary vane in the pump body is damaged, and the vacuum pump is damaged or the vacuumizing effect is poor. In order to avoid the situation, in the prior art, a baffle valve is generally arranged between a vacuum pump and a vacuumizing pipeline, the on-off of the vacuum pump and the vacuumizing pipeline is controlled through the baffle valve, a connecting pipe is arranged between the vacuum pump and the baffle valve and is connected with an inflation valve, and when the vacuum pump is closed and the baffle valve breaks the connection between the vacuum pump and the vacuumizing pipeline, the inflation valve inflates atmosphere into a pump cavity of the vacuum pump, so that the pressure inside and outside the pump cavity is balanced, and the oil return of the pump oil to the vacuumizing pipeline is prevented. Therefore, the baffle valve and the inflation valve are two independent parts, the occupied space is large, the connection is required by a connecting pipe, and the operation is complicated.

It is seen that improvements and enhancements in the prior art are needed.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned deficiencies of the prior art, an object of the present invention is to provide a vacuum baffle inflation valve with compact structure and high reliability.

In order to achieve the purpose, the utility model adopts the following technical proposal:

a vacuum baffle inflation valve comprises a valve body, an air cylinder arranged at one end of the valve body, a first interface arranged at the other end of the valve body, a second interface arranged at the bottom of the valve body, and an inflation inlet arranged on the valve body; a piston rod of the air cylinder extends into the valve body, and a baffle plate for isolating the communication between the first interface and the second interface is arranged at the end part of the piston rod; the first interface is used for being connected with a vacuumizing pipeline, and the second interface is used for being connected with a vacuum pump; the inflation inlet is controlled to be opened or closed through the electromagnetic valve, and when the inflation inlet is opened, atmosphere enters the interior of the valve body and the second connector through the inflation inlet.

As a further improvement of the technical scheme, an inflation filtering joint is arranged at the air inlet end of the electromagnetic valve, the air outlet end of the electromagnetic valve is connected with the inflation inlet, and the inflation filtering joint is disconnected with the inflation inlet when the electromagnetic valve is in an open state.

As a further improvement of the above technical scheme, when the baffle plate cuts off the communication between the first interface and the second interface, the interior of the valve body is divided into an inflation area and a negative pressure area, the negative pressure area is communicated with the first interface, and the inflation area is communicated with the second interface; and a sealing step matched with the baffle is arranged at the intersection of the inflation area and the negative pressure area.

As a further improvement of the technical scheme, the baffle is fixedly provided with the sealing gasket, and the air cylinder is used for driving the baffle to move towards the sealing step, so that the baffle presses the sealing gasket on the sealing step.

As a further improvement of the technical scheme, a vacuum detection sensor positioned beside the second interface is arranged on the valve body.

As a further improvement of the technical scheme, the air cylinder comprises a cylinder body, a piston with a shell moving in the cylinder body, a cover plate fixed in the cylinder body and a piston rod extending transversely, the cylinder body is connected with a port of the valve body through a connecting block, one end of the piston rod is connected with the piston, the other end of the piston rod is connected with the baffle plate, a cavity between the piston and the bottom wall of the cylinder body is a first cavity, a cavity between the piston and the cover plate is a second cavity, and the cylinder body is provided with a first air inlet communicated with the first cavity and a second air inlet communicated with the second cavity.

Has the advantages that:

compared with the prior art, the vacuum baffle inflation valve provided by the utility model has compact structure, not only has the baffle blocking function, but also has the inflation pressure regulating function; when the vacuum pump is powered off and closed, the air cylinder drives the baffle on the piston rod to separate the first interface from the second interface so as to enable the interior of the valve body to be divided into an inflation area and a negative pressure area, the negative pressure area is communicated with the first interface, the inflation area is communicated with the second interface, then the electromagnetic valve is in a closed state, the valve core of the electromagnetic valve descends, the inflation filtering joint is communicated with the inflation opening, the atmosphere enters the inflation area through the inflation opening and inflates air to the pump cavity of the vacuum pump, the pressure inside and outside the pump cavity is balanced, pump oil is prevented from being damaged to the vacuum pump due to pressure difference backflow, and the service life of the vacuum pump is guaranteed.

Drawings

Fig. 1 is a perspective view of the vacuum baffle gas-filled valve provided by the present invention.

Fig. 2 is a schematic structural view of the vacuum baffle inflation valve provided by the present invention, wherein the baffle separates the first interface and the second interface.

Fig. 3 is a schematic structural view showing the communication between the first port and the second port in the vacuum flapper air charging valve provided by the present invention.

Fig. 4 is a schematic structural view of the vacuum baffle inflation valve provided by the present invention during inflation.

Description of the main element symbols: the air-filled valve comprises a valve body 1, a first connector 11, a second connector 12, an air filling port 13, an air filling region 14, a negative pressure region 15, a sealing step 16, a cylinder 2, a cylinder 21, a piston 22, a cover plate 23, a piston rod 24, a connecting block 25, a first cavity 26, a second cavity 27, a first air inlet 28, a second air inlet 29, a baffle 31, a sealing gasket 32, an electromagnetic valve 4, an air filling filtering joint 5 and a vacuum detection sensor 6.

Detailed Description

The utility model provides a vacuum baffle inflation valve, for making the utility model discloses a purpose, technical scheme and effect are clearer, make clear and definite, and it is right that the following refers to the attached drawing and the embodiment is lifted the utility model discloses further detailed description. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the scope of the invention.

Referring to fig. 1-4, the present invention provides a vacuum baffle gas charging valve, which includes a valve body 1, a cylinder 2 disposed at one end of the valve body 1, a first connector 11 disposed at the other end of the valve body 1, a second connector 12 disposed at the bottom of the valve body 1, and a gas charging port 13 disposed on the valve body 1; a piston rod 24 of the cylinder 2 extends into the valve body 1, and a baffle plate 31 for isolating the communication between the first port 11 and the second port 12 is arranged at the end part of the piston rod 24; the first interface 11 is used for being connected with a vacuum-pumping pipeline, and the second interface 12 is used for being connected with a vacuum pump; the opening or closing of the air charging port 13 is controlled by the electromagnetic valve 4, and when the air charging port 13 is opened, atmosphere enters the interior of the valve body 1 and the second interface 12 through the air charging port 13.

In practical application, the first interface 11 of the valve body 1 is connected with a vacuum pumping pipeline, and the second interface 12 is connected with a vacuum pump. When the vacuum-pumping pipeline needs to generate negative pressure, the first interface 11 is communicated with the second interface 12, the vacuum pump is started to provide negative pressure for the vacuum-pumping pipeline, the electromagnetic valve 4 is in a normally open state at the moment, the valve core 41 of the electromagnetic valve 4 rises to block the communication between the inflation filter joint 5 and the inflation inlet 13, namely, the atmosphere can not enter the valve body 1 through the inflation inlet 13 at the moment. When the vacuum pump is powered off and closed, the air cylinder 2 drives the baffle plate 31 on the piston rod 24 to separate the communication between the first interface 11 and the second interface 12, so that the interior of the valve body 1 is divided into the inflation area 14 and the negative pressure area 15, the negative pressure area 15 is communicated with the first interface 11, the inflation area 14 is communicated with the second interface 12, then the electromagnetic valve 4 is in a closed state, the valve core 41 of the electromagnetic valve 4 descends, the inflation filtering connector 5 is communicated with the inflation opening 13, the atmosphere enters the inflation area 14 through the inflation opening 13, the pump cavity of the vacuum pump is inflated, the internal pressure and the external pressure of the pump cavity are balanced, and the liquid impact phenomenon generated when pump oil enters the vacuum pump cavity from the air inlet of the vacuum pump due to differential pressure backflow is prevented.

Compared with the prior art, the utility model provides a vacuum baffle inflation valve compact structure not only has 31 separation functions of baffle, still has and aerifys the pressure regulating function, ensures the life of vacuum pump, and the reliability is high.

It should be understood that, in order to avoid the frequent starting of the vacuum pump and damage to the driving motor of the vacuum pump, the vacuum pump needs to be set to be in a normally open state, and the vacuum pipeline is cut off or connected by the baffle 31 valve, so that the vacuum pump motor is protected. When the vacuum pump is in a normally open state, the electromagnetic valve 4 is also in a normally open state, and the atmosphere cannot enter the valve body 1.

Further, the inlet end of solenoid valve 4 is equipped with aerifys filtering joint 5, solenoid valve 4's the end of giving vent to anger is connected with inflation inlet 13, can filter the atmosphere that gets into in the valve body 1 through aerifing filtering joint 5 to impurity in the atmosphere gets into the vacuum pump, causes the vacuum pump damage.

Preferably, when whole evacuation system has a power failure in the use proruption or the mill has a power failure for a long time, solenoid valve 4 and vacuum pump all are in outage off-state, inflate filter joint 5 and inflation inlet 13 intercommunication this moment, and the atmosphere is inflated to the pump chamber of vacuum pump through getting into 1 insidely of valve body, makes the inside and outside pressure balance of pump chamber, has prevented that pump oil from causing the backward flow owing to pressure differential, more accords with actual production demand, has the practicality.

Specifically, a sealing step 16 for cooperating with the baffle 31 is arranged at the intersection of the inflation area 14 and the negative pressure area 15, a sealing gasket 32 is fixedly installed on the baffle 31, and the cylinder 2 is used for driving the baffle 31 to move towards the sealing step 16, so that the baffle 31 presses the sealing gasket 32 against the sealing step 16. The sealing gasket 32 is matched with the sealing step 16, so that the reliability of the partition is ensured.

Preferably, a vacuum detection sensor 6 is arranged on the valve body 1 and is located beside the second interface 12. The vacuum detection sensor 6 can obtain the negative pressure value of the vacuum pipeline, and the vacuum detection sensor 6 feeds back a signal to the control system.

Preferably, the cylinder 2 includes a cylinder body 21, a piston 22 whose shell moves in the cylinder body 21, a cover plate 23 fixed in the cylinder body 21, and a piston rod 24 extending transversely, the cylinder body 21 is connected with a port of the valve body 1 through a connecting block 25, one end of the piston rod 24 is connected with the piston 22, the other end is connected with the baffle plate 31, a cavity between the bottom walls of the piston 22 and the cylinder body 21 is a first cavity 26, a cavity between the piston 22 and the cover plate 23 is a second cavity 27, and the cylinder body 21 is provided with a first air inlet 28 communicated with the first cavity 26 and a second air inlet 29 communicated with the second cavity 27.

When the first air inlet hole 28 is filled with compressed air, the first cavity 26 expands, the compressed air pushes the piston 22 to move towards the valve body 1, the baffle 31 on the piston rod 24 is driven to be matched with the sealing step 16, the communication between the first interface 11 and the second interface 12 is cut off, and the air flow in the vacuum pumping pipeline is cut off.

When the second air inlet hole 29 is filled with compressed air, the second cavity 27 expands, the compressed air pushes the piston 22 to move towards the direction away from the valve body 1, the baffle plate 31 on the piston rod 24 is driven to move away from the sealing step 16, the first port 11 and the second port 12 are communicated, and the air flow in the vacuumizing pipeline is communicated.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be mechanically, electrically or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or may be in communication within two elements or in interactive relationship between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

It is understood that equivalent substitutions or changes can be made by those skilled in the art according to the technical solution of the present invention and the inventive concept thereof, and all such changes or substitutions shall fall within the scope of the present invention.

Claims

1. A vacuum baffle gas charging valve is characterized by comprising a valve body, a cylinder arranged at one end of the valve body, a first interface arranged at the other end of the valve body, a second interface arranged at the bottom of the valve body, and a gas charging port arranged on the valve body; a piston rod of the cylinder extends into the valve body, and a baffle for isolating the communication between the first port and the second port is arranged at the end part of the piston rod; the first interface is used for being connected with a vacuumizing pipeline, and the second interface is used for being connected with a vacuum pump; the inflation inlet is controlled to be opened or closed through the electromagnetic valve, and when the inflation inlet is opened, atmosphere enters the interior of the valve body and the second connector through the inflation inlet.

2. The vacuum flapper inflation valve of claim 1, wherein an inflation filter fitting is provided at an inlet end of the solenoid valve, an outlet end of the solenoid valve is connected to the inflation port, and the inflation filter fitting is disconnected from the inflation port when the solenoid valve is in an open state.

3. The vacuum flapper inflation valve of claim 1 wherein, when the flapper obstructs communication between the first port and the second port, the interior of the valve body is divided into an inflation region and a negative pressure region, the negative pressure region communicating with the first port and the inflation region communicating with the second port; and a sealing step matched with the baffle is arranged at the intersection of the inflation area and the negative pressure area.

4. The vacuum flapper valve of claim 3 wherein a sealing gasket is fixedly mounted on the flapper, and wherein the cylinder is adapted to drive the flapper toward the sealing step so that the flapper compresses the sealing gasket against the sealing step.

5. The vacuum flapper inflation valve of claim 1, wherein a vacuum detection sensor is provided on the valve body alongside the second port.

6. The vacuum flapper inflation valve of claim 1, wherein the cylinder includes a cylinder body, a piston having a housing movable in the cylinder body, a cover plate fixed in the cylinder body, and a piston rod extending transversely, the cylinder body is connected to the port of the valve body through a connecting block, one end of the piston rod is connected to the piston, the other end is connected to the flapper, the cavity between the piston and the bottom wall of the cylinder body is a first cavity, the cavity between the piston and the cover plate is a second cavity, and the cylinder body is provided with a first air inlet hole communicating with the first cavity and a second air inlet hole communicating with the second cavity.