CN218787182U

CN218787182U - Vacuum suction device

Info

Publication number: CN218787182U
Application number: CN202223161515.9U
Authority: CN
Inventors: 余百平; 方嫚
Original assignee: Wuhan Edw Pump & Valve Co ltd
Current assignee: Wuhan Edw Pump & Valve Co ltd
Priority date: 2022-11-28
Filing date: 2022-11-28
Publication date: 2023-04-04
Anticipated expiration: 2032-11-28

Abstract

The utility model relates to a vacuum pumping device, include the liquid ring vacuum pump by driving motor and diaphragm formula shaft coupling driven, liquid ring vacuum pump one end is connected with the admission line, the liquid ring vacuum pump other end is connected with the exhaust duct who communicates with catch water, catch water is equipped with the backflow pipeline who has the solenoid valve with the admission line intercommunication, admission line one side is equipped with nitrogen gas entry and nitrogen gas admission control mechanism, catch water one side is equipped with nitrogen gas export and nitrogen gas control mechanism of giving vent to anger for control the gas stock of flushing nitrogen process. The utility model controls the vacuum degree of the air inlet pipeline, and prevents corrosive gas from corroding the vacuum pump when the vacuum degree is too high; when the maintenance is needed, nitrogen is injected to enable the working condition operation area to recover production as soon as possible in a short time, the maintenance time is shortened to a great extent, the accuracy and the safety of the nitrogen injection work can be improved and guaranteed, and the working efficiency is improved.

Description

Vacuum suction device

Technical Field

The utility model relates to a chemical industry equipment technical field especially relates to a vacuum suction device.

Background

The chemical industry is a heavily polluted industry, and partial substance decomposition can generate a lot of irritant toxic, corrosive, inflammable and other gases which can quickly reach the air when being diffused, thereby seriously damaging and harming the health of people. In order to prevent these unsafe factors from occurring in production, other gases such as combustible, corrosive and toxic gases need to be evacuated in time during production of chemical product units, and a vacuum pump device is generally adopted to collect and discharge harmful gases.

But vacuum pump device commonly used at present has some problems, on the one hand, partial corrosive gas easily causes the corruption to vacuum pump device when vacuum is great, reduce vacuum pump device service life, on the other hand, when vacuum pump device need overhaul, other gaseous evacuation such as with the inside residual flammable of vacuum pump device, corrosivity, it is a work that needs to be very cautious, because chemical industry operating mode security requires highly, the place of operation is more complicated again, and there are a lot of uncontrollable human factors in the management again, all need artifical very long a period to test when the maintenance of shutting down, overhaul latency is too long, and the inside gaseous operating mode of device is undefined, need wait for professional to accept and just can go into the field maintenance, it is with high costs to detect and accept.

SUMMERY OF THE UTILITY MODEL

For the vacuum pump that solves prior art existence easily receive corruption, overhaul the technical problem that latency is long and detect and accept with high costs, the utility model discloses improve the vacuum pump device that current chemical industry used, provide a new security high, can shorten the vacuum suction device who overhauls the procedure, reduce latency, reduce the detection cost, make it drop into production as early as possible, the technical scheme of the utility model as follows.

The utility model relates to a vacuum pumping device, include the liquid ring vacuum pump by driving motor and diaphragm formula shaft coupling driven, liquid ring vacuum pump one end is connected with the admission line, the liquid ring vacuum pump other end is connected with the exhaust duct who communicates with catch water, catch water is equipped with the backflow pipeline who has the solenoid valve with the admission line intercommunication, admission line one side is equipped with nitrogen gas entry and nitrogen gas admission control mechanism, catch water one side is equipped with nitrogen gas export and nitrogen gas control mechanism of giving vent to anger for control the gas stock of flushing nitrogen process.

As a further technical scheme, the nitrogen gas inlet control mechanism comprises a gas inlet end manual ball valve, a gas inlet end metal rotor flow meter and a gas inlet end pressure gauge, wherein the gas inlet end manual ball valve is positioned on one side of a nitrogen gas inlet and connected with a gas inlet pipeline, and the gas inlet end manual ball valve, the gas inlet end metal rotor flow meter and the gas inlet end pressure gauge are used for calculating the nitrogen gas inlet amount and the vacuum degree.

As a further technical scheme, the nitrogen gas outlet control mechanism comprises an outlet end manual ball valve and an outlet end pressure gauge, wherein the outlet end manual ball valve is positioned on one side of a nitrogen gas outlet and connected with the steam-water separator, and the nitrogen gas outlet control mechanism is convenient for exhausting after the nitrogen gas vacuum degree is stable.

As a further technical scheme, the system also comprises a tubular heat exchanger which is connected with the steam-water separator through a heat inlet pipeline of the heat exchanger and is connected with the liquid ring vacuum pump through a heat outlet pipeline of the heat exchanger.

As a further technical scheme, a filter screen is arranged between the heat inlet pipeline of the heat exchanger and the steam-water separator, so that impurities of the steam-water separator are prevented from entering.

As a further technical scheme, one side of the steam-water separator is provided with a liquid level transmitter, a liquid supplementing pipeline and an overflow pipeline, the liquid level transmitter feeds back signals to the DCS control system, and the DCS control system controls the liquid level of the steam-water separator according to the set liquid level control liquid supplementing pipeline and the set overflow pipeline.

The utility model has the advantages that the utility model is provided with the return pipeline and the nitrogen inlet, when the vacuum degree of the air inlet pipeline is too high, the gas flows back to the air inlet pipeline from the return pipeline or directly rushes part of the nitrogen to reduce the vacuum degree, when the vacuum degree of the air inlet pipeline reaches a set value, the return pipeline or the nitrogen inlet is closed, and the corrosion of corrosive gas to the vacuum pump when the vacuum degree is too high can be prevented; the utility model discloses can dash into nitrogen gas when needing to overhaul and make operating mode operation district can resume production as early as possible in the short time, to a great extent shortens repair time, and the in-process of dashing into nitrogen gas has precision instrument's control, can let the user directly perceivedly, control the gas in the operating mode equipment accurately and still deposit and the operational aspect to let accuracy, the security of ' dashing nitrogen ' work can both be perfect and guarantee, make its work efficiency improve by a wide margin.

Drawings

Fig. 1 is a schematic structural view of the vacuum suction apparatus of the present invention;

FIG. 2 is a schematic view of the nitrogen inlet control of the vacuum suction apparatus of the present invention;

FIG. 3 is a schematic view of the nitrogen outlet control of the vacuum pumping apparatus of the present invention;

in the figure: 1-liquid ring vacuum pump; 2-driving the motor; 3-diaphragm type coupling; 4-steam-water separator; 5-a tubular heat exchanger; 6-an air inlet pipeline; 7-an exhaust duct; 8-a return line; 9-heat exchanger heat inlet pipe; 10-heat exchanger heat outlet pipe; 11-a liquid level transmitter; 12-a fluid infusion pipeline; 13-an overflow line; 14-inlet end manual ball valve; 15-inlet end metal rotameter; 16-an air inlet end pressure gauge; 17-outlet end manual ball valve; 18-outlet end pressure gauge; n1-an air inlet; n2-exhaust port; n3-fluid infusion port; n4-a liquid discharge port; n5-heat exchanger cold inlet; n6-heat exchanger cold outlet; N7-Nitrogen inlet; n8-nitrogen outlet.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and embodiments, wherein the same components are not repeatedly labeled. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

As shown in fig. 1, the utility model relates to a vacuum pumping device, insert DCS control system, carry out regulation and control to the device by DCS control system, this device includes liquid ring vacuum pump 1, driving motor 2 and diaphragm formula shaft coupling 3, liquid ring vacuum pump 1 couples with diaphragm formula shaft coupling 3, driving motor 2 couples with diaphragm formula shaft coupling 3, it is rotatory by driving motor 2 drive liquid ring vacuum pump 1, the gas that produces the chemical industry operation pumps to liquid ring vacuum pump 1 in through air inlet N1 and admission line 6, arrange to catch water 4 through exhaust duct 7 after the compression, catch water 4 is with catch water, store up water in catch water 4, gaseous gas is discharged by the gas vent N2 that is located catch water 4 tops.

As shown in fig. 1, a return line 8 is provided on one side of the steam-water separator 4, and the return line 8 is communicated with the intake duct 6 via an electromagnetic valve. When the liquid ring vacuum pump 1 is operated and the vacuum degree of the gas inlet pipeline 6 is too high, gas flows back to the gas inlet pipeline through the return pipeline 8, and the vacuum degree is reduced; when the vacuum degree of the air inlet pipeline 6 reaches a set value, the return pipeline 8 is closed.

In one embodiment, the liquid ring vacuum pump 1 can be directly connected with a water source, waste liquid is discharged through a liquid discharge port N4, liquid discharged from the steam-water separator 4 is discharged through the liquid discharge port N4, as shown in fig. 1, in a preferred embodiment, the device further comprises a tubular heat exchanger 5, circulating water is filtered by a heat exchanger hot inlet pipeline 9 connected with the steam-water separator 4 and then enters the tubular heat exchanger 5, a heat exchanger cold inlet N5 and a heat exchanger cold outlet N6 are arranged below the tubular heat exchanger 5, and the circulating water is cooled and then enters the liquid ring vacuum pump 1 through a heat exchanger hot outlet pipeline 10, so that the liquid utilization rate can be improved. This device is when using, and catch water 4 liquid level need keep at the certain limit, therefore catch water 4 one side is equipped with liquid level transmitter 11, fluid infusion pipeline 12 and overflow pipeline 13, by liquid level transmitter 11 feedback signal to DCS control system, DCS control system controls catch water 4's liquid level according to the liquid level control fluid infusion pipeline 12 and the overflow pipeline 13 of setting for.

As shown in fig. 1, 2 and 3, a nitrogen inlet N7 and a nitrogen inlet control mechanism are arranged on one side of the inlet pipe 6, and the nitrogen inlet control mechanism comprises an inlet end manual ball valve 14, an inlet end metal rotameter 15 and an inlet end pressure gauge 16, which are located on one side of the nitrogen inlet N7 and connected with the inlet pipe 6, and is used for calculating the nitrogen inlet amount and the vacuum degree. And a nitrogen outlet N8 and a nitrogen outlet control mechanism are arranged on one side of the steam-water separator 4, and the nitrogen outlet control mechanism comprises an outlet end manual ball valve 17 and an outlet end pressure gauge 18, which are positioned on one side of the nitrogen outlet N8 and connected with the steam-water separator 4, and is used for calculating and controlling the gas storage in the nitrogen flushing process.

Shut down when the device need be overhauld, close except that nitrogen gas entry N7 and nitrogen gas export N8 outer all pipeline valves of device, use colorless tasteless, the chemical property is inactive, and nitrogen gas that the purity is high replaces other harmful gas, high-pressure nitrogen gas is in nitrogen gas entry N7 access device, open inlet end manual ball valve 14, nitrogen gas passes through inlet end metal rotor flow meter 15, get into inlet end manometer 16, then pump nitrogen gas to the exit end through liquid ring vacuum pump 1, open exit end manual ball valve 17, discharge to the exhaust gas pipeline from nitrogen gas export N8 through giving vent to anger end manometer 18, remaining corrosivity in the unit fast, toxic gas discharges, in order to ensure the safety of production.

The present invention is not limited to the above embodiments and examples, and various changes and equivalent substitutions can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and all embodiments falling within the scope of the present invention are intended to be protected by the present invention.

Claims

1. A vacuum suction device comprises a liquid ring vacuum pump (1) driven by a driving motor (2) and a diaphragm type coupling (3), and is characterized in that: liquid ring vacuum pump (1) one end is connected with admission line (6), liquid ring vacuum pump (1) other end is connected with exhaust duct (7) with catch water (4) intercommunication, catch water (4) are equipped with backflow pipeline (8) that have the solenoid valve with admission line (6) intercommunication, admission line (6) one side is equipped with nitrogen gas entry (N7) and nitrogen gas admission control mechanism, catch water (4) one side is equipped with nitrogen gas export (N8) and nitrogen gas control mechanism of giving vent to anger for control the gas stock of flushing nitrogen process.

2. The vacuum suction device according to claim 1, wherein: the nitrogen gas inlet control mechanism comprises a gas inlet end manual ball valve (14), a gas inlet end metal rotor flow meter (15) and a gas inlet end pressure gauge (16), wherein the gas inlet end manual ball valve (14) is located on one side of a nitrogen gas inlet (N7) and connected with a gas inlet pipeline (6) and used for calculating the nitrogen gas inlet amount and the vacuum degree.

3. The vacuum suction device according to claim 1, wherein: the nitrogen gas outlet control mechanism comprises an outlet end manual ball valve (17) and a gas outlet end pressure gauge (18), wherein the outlet end manual ball valve (17) is located on one side of a nitrogen gas outlet (N8) and connected with the steam-water separator (4), and the nitrogen gas outlet control mechanism is convenient for exhausting after the nitrogen gas vacuum degree is stable.

4. The vacuum suction device according to claim 1, wherein: the system also comprises a tubular heat exchanger (5) which is connected with the steam-water separator (4) through a heat exchanger heat inlet pipeline (9) and is connected with the liquid ring vacuum pump (1) through a heat exchanger heat outlet pipeline (10).

5. The vacuum suction device according to claim 4, wherein: a filter screen is arranged between the heat inlet pipeline (9) of the heat exchanger and the steam-water separator (4) to prevent impurities of the steam-water separator (4) from entering.

6. The vacuum suction device according to claim 1, wherein: a liquid level transmitter (11), a liquid supplementing pipeline (12) and an overflow pipeline (13) are arranged on one side of the steam-water separator (4), the liquid level transmitter (11) feeds back signals to the DCS control system, and the DCS control system controls the liquid level of the steam-water separator (4) according to the set liquid level control liquid supplementing pipeline (12) and the set overflow pipeline (13).