CN216950749U

CN216950749U - Central control vacuum system

Info

Publication number: CN216950749U
Application number: CN202220231863.XU
Authority: CN
Inventors: 陈铭枢; 张龙河; 吴春林
Original assignee: Xiamen Huahan Electromechanical Co ltd
Current assignee: Xiamen Huahan Electromechanical Co ltd
Priority date: 2022-01-27
Filing date: 2022-01-27
Publication date: 2022-07-12
Anticipated expiration: 2032-01-27

Abstract

The utility model discloses a central centralized control vacuum system, which comprises: the air inlet main valve is connected with the equipment to be dried; the vacuum buffer tank is arranged on the air outlet side of the air inlet main valve; the main pipeline is connected to one side of the vacuum buffer tank, a plurality of openings are formed in the main pipeline, and a pressure gauge is fixed on the main pipeline; the vacuum pumps are correspondingly arranged on the opening of the main pipeline; PLC controlgear, with the vacuum pump, the manometer electricity is connected, start the vacuum pump of corresponding quantity according to the numerical value of vacuum gauge, when equipment pressure risees, can transmit to PLC controlgear after detecting through the manometer, make PLC controlgear start other vacuum pumps, improve the evacuation ability of system, and when equipment pressure reduces, then close the vacuum pump of corresponding quantity through PLC controlgear, can open the vacuum pump of corresponding quantity according to the pressure of the equipment of being connected, the vacuum pump of operation under standby state is few, the noise is less when low power operating condition when the rational utilization resource.

Description

Central control vacuum system

Technical Field

The utility model relates to a vacuum system, in particular to a central centralized control vacuum system.

Background

Traditional workshop injection moulding device, drying equipment all need use the negative pressure, also be the vacuum, general configuration mode is that an injection moulding device or a desiccator dispose a small-size oil blanket formula vacuum pump, injection moulding device in workshop, when the drying equipment use amount is great, the use amount of vacuum pump is just also very much, and after the equipment is started, the vacuum pump just continuously runs, the energy consumption is high, the temperature is high, the fault rate is also high, the maintenance cost is also very high, and the noise of a plurality of vacuum pump during operation is big, the noise pollution of formation is also stronger.

SUMMERY OF THE UTILITY MODEL

The utility model provides a central centralized control vacuum system which can effectively solve the problems.

The utility model is realized by the following steps:

a central centrally controlled vacuum system comprising:

the air inlet main valve is connected with the equipment to be dried;

the vacuum buffer tank is arranged on the air outlet side of the air inlet main valve;

the main pipeline is connected to one side of the vacuum buffer tank, a plurality of openings are formed in the main pipeline, and a pressure gauge is fixed on the main pipeline;

the vacuum pumps are correspondingly arranged on the openings of the main pipeline;

and the PLC control equipment is electrically connected with the vacuum pumps and the pressure gauge and starts the vacuum pumps with corresponding quantity according to the numerical value of the vacuum gauge.

As a further improvement, a dust filter is connected in front of an air inlet pump port of the vacuum pump.

As a further improvement, the inside of the vacuum pump is provided with an exhaust filter, and an air outlet of the exhaust filter faces the outside air.

As a further improvement, a vacuum breaking valve is connected to the main pipeline.

As a further improvement, a vacuum gauge is connected to the main pipeline.

As a further improvement, the main pipeline is connected with the vacuum buffer tank through a corrugated pipe.

As a further improvement, a pneumatic valve and a manual valve are further arranged at the front end of the air inlet pump opening of each vacuum pump, and the pneumatic valve is electrically connected with the PLC control device.

As a further improvement, a plurality of screen plates are arranged in the vacuum buffer tank, and through holes between adjacent screen plates are not overlapped with each other.

The utility model has the beneficial effects that:

according to the utility model, through the arranged PLC control equipment and the pressure gauge on the main pipeline, the air supply pressure of the connected equipment can be judged according to the pipeline pressure in the main pipeline, when the system is started, the vacuum pumps are started one by one, the valves corresponding to the pumps are opened while the pumps are started, when the equipment pressure is increased, the air supply pressure can be transmitted to the PLC control equipment after being detected by the pressure gauge, so that the PLC control equipment starts other vacuum pumps, the vacuum pumping capacity of the system is improved, when the equipment pressure is reduced, the corresponding number of vacuum pumps are closed through the PLC control equipment, the corresponding number of vacuum pumps can be started according to the pressure of the connected equipment, the number of vacuum pumps running in a standby state is small, the resources are reasonably utilized, and the noise is small in a low-power working state.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic front view of a centrally controlled vacuum system according to the present invention.

FIG. 2 is a schematic side view of a centralized control vacuum system according to the present invention.

Fig. 3 is a schematic top view of a centralized control vacuum system according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without inventive efforts based on the embodiments of the present invention, are within the scope of protection of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1-3, a central centralized control vacuum system includes: a main air inlet valve 1 connected with the equipment to be dried; the vacuum buffer tank 2 is arranged on the air outlet side of the air inlet main valve 1; the main pipeline 3 is connected to one side of the vacuum buffer tank 2, a plurality of openings are formed in the main pipeline 3, and a pressure gauge 31 is fixed on the main pipeline 3; the vacuum pumps 4 are correspondingly arranged on the openings of the main pipeline 3; and the PLC control device 5 is electrically connected with the vacuum pumps 4 and the pressure gauge 31, and starts the vacuum pumps 4 with corresponding quantity according to the numerical value of the vacuum gauge 32.

When the connecting device is used, the air inlet main valve 1 is communicated with external injection molding equipment or drying equipment, the air inlet main valve 1 is opened before or after the air inlet main valve 1 is operated to perform vacuum pumping operation, when the connecting device is not needed to be used, the air inlet main valve 1 is directly closed, the vacuum pump 4 does not interfere with the working state of the connecting equipment, after the connecting device is connected, the vacuum pump 4 is started, the vacuum pump 4 generates negative pressure, and gas in the connecting equipment is pumped out through the main pipeline 3, the vacuum buffer tank 2 and the air inlet valve.

In the process of air extraction, manually starting all vacuum pumps 4, detecting the pressure in the main pipeline 3 through a pressure gauge 31, wherein the pressure in the main pipeline 3 represents the pressure in the connecting equipment, the pressure gauge 31 can transmit the pressure value to the PLC control equipment 5, and a threshold value can be set in advance in the PLC control equipment 5, for example, the pressure is set to be three, namely a first gear, a second gear and a third gear, when the pressure in the main pipeline 3 reaches below the first gear, the equipment is in a standby state or a low-power working state, the PLC control equipment 5 closes other vacuum pumps 4, only one vacuum pump 4 is left to work alone, when the pressure in the main pipeline 3 is increased to above the first gear, the connecting equipment is judged to start primary work, the corresponding vacuum pump 4 is started alone, so that the whole system has two vacuum pumps 4 to act, and after pressure reaches the third gear, then PLC controlgear 5 judges to be connected the connecting device and at high-power operation, then starts all vacuum pumps 4 together, can come to open and close corresponding quantity's vacuum pump 4 through PLC controlgear 5 according to the pressure change in trunk line 3, and it is extravagant not at low power, can accord with operating condition at high power.

It should be particularly emphasized that, in the PLC control device 5, a corresponding pressure threshold may be set in advance, and the corresponding pressure threshold may be set according to the device parameters that actually need to be acted on, so as to ensure that the output is not wasted and the vacuum effect is good.

The signal receiving and signal outputting of the PLC control device 5 and the wiring relationship between the PLC control device 5 and each of the pneumatic and electric valves are prior art, and detailed descriptions are not given in this embodiment.

In the running process of the vacuum pumps 4, only 2 vacuum pumps are required to be started in normal running, and only 1 vacuum pump is required to be started in the limit, so that the noise source is greatly reduced.

Furthermore, it should be emphasized that the PLC control device 5 can also adjust the operation time of the vacuum pumps 4, for example, after the first vacuum pump 4 continuously operates for 4 hours, the vacuum pump 4 is turned off, another idle vacuum pump 4 is turned on, and the vacuum pumps 4 are operated in a balanced manner by using an alternate mode, so as to improve the service life.

Wherein, the setting of vacuum buffer tank 2 is in order to set up a transfer process between main inlet valve 1 and trunk line 3, and vacuum buffer tank 2 can be separated gas-liquid when can storing gas, avoids having liquid to carry out in the vacuum pump 4 along with foreign gas, air.

In order to achieve the above gas-liquid separation effect, the position of the inlet main valve 1 is arranged at the lower half part of the vacuum buffer tank 2, and the connection position with the main pipeline 3 on the vacuum buffer tank 2 is arranged at the upper half part of the vacuum buffer tank 2, so that the liquid in the mixture pumped out from the connection equipment can be precipitated at the bottom of the vacuum buffer tank 2, meanwhile, the bottom of the vacuum buffer tank 2 is provided with a control valve 22, and after the vacuumizing process is finished, the liquid precipitated at the bottom is discharged.

In the process of gas-liquid separation, in order to improve the separation effect, a plurality of filtering screen plates 21 are arranged in the vacuum buffer tank 2, activated carbon is arranged on the screen plates 21, most liquid and suspended matters in the mixture can be adsorbed, and in order to improve the adsorption effect, through holes between adjacent screen plates 21 are not overlapped, so that the mixture accessed at the same time can be separated and filtered for a plurality of times.

In order to protect the rotating structure of the vacuum pump 4, the dust in the connecting equipment is prevented from entering and interfering the normal operation of the vacuum pump 4, a dust filter 6 is connected in front of the air inlet pump opening of the vacuum pump 4, and the dust can be filtered and isolated at the pump opening of the vacuum pump 4.

In order to avoid that the connecting piece can not be removed due to the internal vacuum when the main pipeline 3 is overhauled, a vacuum breaking valve is connected on the main pipeline 3.

The aforesaid changes the quantity that detects with this control vacuum pump 4 and start through the pressure gauge 31 to the pressure of trunk line 3, in other embodiments, also can be provided with a vacuometer 32 on trunk line 3, can be through trunk line 3, vacuum buffer tank 2, the valve of admitting air and then detect the vacuum degree in the jointing equipment, can refer to the above-mentioned introduction about pressure, divide into three shelves with the vacuum degree, corresponds according to the rank of vacuum degree and opens different quantity's vacuum pump 4.

Further, be connected through a bellows between trunk line 3 and the vacuum buffer tank 2, adopt the bellows buckle to connect to the interface, can be quick install or demolish vacuum pump 4, also make things convenient for work such as subsequent maintenance, maintenance.

Furthermore, a pneumatic valve and a manual valve are further arranged at the front end of an air inlet pump port of each vacuum pump 4, the pneumatic valve is electrically connected with the PLC control device 5, remote opening and closing of the vacuum pumps 4 can be achieved through the pneumatic valve, and the manual valve can be manually closed and locked when the system is closed and maintained so as to improve the safety degree.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A central, centrally controlled vacuum system, comprising:

the air inlet main valve is connected with the equipment to be dried;

2. The vacuum system as claimed in claim 1, wherein a dust filter is connected to the front of the inlet of the vacuum pump.

3. A central control vacuum system according to claim 2, characterized in that the vacuum pump is internally provided with an exhaust filter, the outlet of which faces the outside air.

4. A central control vacuum system according to claim 1, characterized in that a vacuum breaker is connected to said main conduit.

5. A centralized control vacuum system as claimed in claim 4, wherein a vacuum gauge is connected to the main conduit.

6. A centralized control vacuum system as claimed in claim 4, wherein the main conduit is connected to the vacuum buffer tank by a bellows.

7. The central centralized control vacuum system as claimed in claim 1, wherein a pneumatic valve and a manual valve are further provided at the front end of the inlet pump port of each vacuum pump, and the pneumatic valve is electrically connected with the PLC control device.

8. The vacuum system as claimed in claim 6, wherein a plurality of screens are provided inside the vacuum buffer tank, and the through holes of the adjacent screens are not overlapped with each other.