CN209976778U - Vacuum-pumping gear pump of vacuum generator - Google Patents

Abstract

The utility model discloses a vacuum generator evacuation gear pump, including pump chamber and evacuation mechanism, be equipped with the front end housing on the pump chamber, pump chamber and evacuation mechanism pass through the front end housing and connect, evacuation mechanism includes vacuum generator, air inlet source governing valve, first and second by ball valve switch, vacuum generator lower extreme and front end housing are located to first cut-off ball valve switch, the second is located vacuum generator one side and is connected with the air inlet source governing valve by ball valve switch. The utility model discloses when carrying liquid medium or production transfer model renewal liquid medium for the first time, pump chamber and the intraductal air of import can discharge rapidly, and the gear pump directly gets into the gear pump intracavity with liquid medium from inhaling after the start, and when renewing liquid medium, the gear pump is automatic discharges old liquid medium from the pump chamber, and labour saving and time saving effectively improves production efficiency, reduce cost.

Description

Vacuum-pumping gear pump of vacuum generator

Technical Field

The utility model relates to a technical field of gear pump, in particular to vacuum generator evacuation gear pump.

Background

In the production process of the coating industry, the gear pump is rapidly replacing a pneumatic diaphragm pump to be widely applied in the coating industry due to the characteristics of small pulsation, stable flow, high precision and the like. However, the gear pumps on the market at present have the following defects:

(1) when the gear pump is used for conveying liquid media for the first time or changing the model number to replace the liquid media in production, the air in the gear metering pump cavity and the air in the inlet pipe can not be rapidly discharged, and the gear pump can not automatically suck the liquid media into the gear pump cavity after being started, so that the function of conveying the liquid media can not be completed. At this moment, the gear pump can be started to carry out normal medium liquid conveying work only by manually filling liquid medium into the inlet pipe and then slowly exhausting air, and inserting the inlet pipe into a container of the liquid medium. The process of manually filling the medium liquid wastes time and labor, and the production efficiency is seriously influenced.

(2) When the new liquid medium is changed to the production transfer model, need discharge the old liquid medium of gear pump from the pump chamber, this function can't be realized to gear pump self. In a production factory, a gear pump is generally used for circulating a cleaning agent and a new medium for a period of time to perform cleaning work, and the cleaning agent and the new medium in the cleaning work period are discharged into a special waste liquid barrel for scrapping treatment. The process is also time-consuming and labor-consuming, and seriously affects the production efficiency, wastes the cost and generates waste liquid to affect the environment.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a vacuum generator evacuation gear pump aims at solving prior art, and the gear pump is when carrying liquid medium or production transfer model renewal liquid medium for the first time, because the unable rapid discharge of air in gear pump intracavity and the inlet pipe, the gear pump can't get into its pump cavity internal problem from inhaling liquid medium after the start-up. Problem to prior art existence, the utility model provides a vacuum generator evacuation gear pump, concrete scheme is as follows:

a vacuum pumping gear pump of a vacuum generator comprises a pump cavity and a vacuum pumping mechanism, wherein a front end cover is arranged on the pump cavity, the pump cavity is connected with the vacuum pumping mechanism through the front end cover, the vacuum pumping mechanism comprises the vacuum generator, an air inlet source regulating valve, a first stop ball valve switch and a second stop ball valve switch, the first stop ball valve switch is arranged at the lower end of the vacuum generator and is connected with the front end cover, and the second stop ball valve switch is arranged on one side of the vacuum generator and is connected with the air inlet source regulating valve; an inlet channel is arranged in the front end cover, an outlet channel is arranged on the opposite side of the inlet channel, a through hole is formed in the direction of the inlet channel, and the through hole is connected with a first cut-off ball valve switch; the pump cavity is internally provided with a driving gear and a driven gear which are mutually meshed, and the inlet channel of the front end cover is communicated with the outlet channel through a gap between the gears of the driving gear and the driven gear and the pump cavity.

Preferably, the through hole is provided above the inlet passage of the front end cover.

Preferably, the inlet channel is connected with a flange and a quick connector, and the through hole is formed in the flange or the quick connector.

Preferably, the through hole is a circular through hole, a threaded hole is formed in the circular through hole, and the circular through hole is connected with the first cut-off ball valve switch through the threaded hole.

Preferably, the second stop ball valve switch is connected with the air inlet source regulating valve through an air pipe.

Preferably, an air outlet end is arranged at the upper end of the vacuum generator and connected with the overflow air pipe.

Preferably, the air outlet end of the vacuum generator comprises an annular hole, an air injection hole and an air outlet which are communicated from bottom to top.

Preferably, an air inlet pipe is further arranged on one side of the air inlet source adjusting valve.

Adopt the technical scheme of the utility model, following beneficial effect has:

when the gear pump is at the primary liquid medium of carrying or the new liquid medium of production transfer model change, pump chamber and the intraductal air of import can discharge rapidly, and the gear pump directly gets into the gear pump intracavity with liquid medium from inhaling after the start, and when changing new liquid medium, the gear pump is automatic discharges old liquid medium from the pump chamber, and labour saving and time saving effectively improves production efficiency, reduce cost.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a schematic perspective view of the vacuum pumping mechanism of the present invention;

FIG. 3 is a sectional view of the inner structure of the front end cover of the present invention;

FIG. 4 is a schematic view of the vacuum-pumping drainage operation of the present invention;

FIG. 5 is a schematic diagram of the operation of the gear conveying liquid medium of the present invention;

fig. 6 is a schematic view of the vacuum-pumping cleaning pump cavity and the pipeline of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 2, the utility model provides a vacuum generator evacuation gear pump, including pump chamber 102 and evacuation mechanism 103, be equipped with front end housing 101 on the pump chamber 102, pump chamber 102 and evacuation mechanism pass through front end housing 101 and connect, evacuation mechanism 103 includes vacuum generator 1032, air inlet source governing valve 1035, first and second stop ball valve switch 1031, 1033, first stop ball valve switch 1031 is located vacuum generator 1032 lower extreme and is connected front end housing 101, second stop ball valve switch 1033 is located vacuum generator 1032 one side and is connected with air inlet source governing valve 1035.

Referring to fig. 3, an inlet channel 1011 is formed in the front end cover 101, an outlet channel 1014 is formed on the opposite side of the inlet channel 1011, a circular through hole 1012 is formed along the direction of the inlet channel 1011, and the circular through hole 1012 is connected to a first off ball valve switch 1031. Inlet channel 1011 is connected with flange and quick-connect joint, circular through-hole 1012 can set up on front end housing, flange or quick-connect joint, the embodiment of the utility model provides an use circular through-hole 1012 to set up the inlet channel 1011 top of front end housing to expand the explanation as the example.

The circular through hole 1012 is provided with a screw hole 1013, and the circular through hole 1012 and the first ball valve closing switch 1031 are connected by the screw hole 1013.

With continued reference to fig. 2, the second stop ball valve switch 1033 is connected to the inlet source regulating valve 1035 through an air pipe 1034; an air outlet end is arranged at the upper end of the vacuum generator 1032 and is connected with an overflow air pipe 1037; an air inlet pipe 1036 is further arranged on one side of the air inlet source adjusting valve 1035.

The vacuum mechanism 103 includes a first stop ball valve switch 1031 connected to the screw hole 1013, a vacuum generator 1032 connected to the upper side of the first stop ball valve switch 1031, a second stop ball valve switch 1033 outside the vacuum generator 1032, an intake source regulating valve 1035 connected to the second stop ball valve switch 1033 via an air pipe 1034, an intake pipe 1036 connected to compressed air via the intake source regulating valve 1035, the vacuum generator 1032, and an overflow pipe 1037 above the vacuum generator 1032.

Referring to fig. 4 to 6, the air outlet end of the vacuum generator 1032 includes an annular hole 10321, an air injection hole 10322 and an air outlet 10323 which are communicated from bottom to top; the pump chamber 102 is provided with a driving gear 104 and a driven gear 105 which mesh with each other.

The utility model discloses a theory of operation does:

referring to fig. 4, when the vacuum generator evacuation gear pump is used for evacuation and drainage, the ball valve switch 1033 is turned on at the outer side of the vacuum generator first, the annular hole 10321 inside the vacuum generator 1032 is filled with compressed air, and the compressed air is ejected out through the ejector 10322 of the vacuum generator and exhausted from the exhaust port 10323 of the vacuum generator; at the moment, the inner hole of a stop ball valve switch 1031 below the vacuum generator and the through hole 1012 of the front end cover are opened to form vacuum negative pressure, the negative pressure continuously sucks air in the pump cavity and air in the inlet pipe from the inlet channel 1011 of the front end cover, and liquid media simultaneously flow into the inlet channel and the pump cavity to finish the vacuumizing drainage work.

Referring to fig. 5, after the vacuum pumping drainage operation is completed, the stop ball valve switch 1031 and the outer stop ball valve switch 1033 below the vacuum generator are sequentially closed, and the gear pump driving motor is started to enter the normal medium conveying operation. At this time, the liquid medium is continuously sucked into the inlet pipe, enters the interior of the pump chamber through the front cover inlet passage 1011, is pressed into the front cover outlet passage 1014 from the gap between the gear and the pump chamber 102 by the driving gear 104 and the driven gear 105, and is finally discharged from the outlet pipe.

Referring to fig. 6, when cleaning the pump cavity and the inlet and outlet pipelines of the vacuum generator vacuum gear pump, the inlet and outlet pipe ends are connected together, the air inlet pipe stop ball valve switch 1033 and the vacuum generator lower stop ball valve switch 1031 are opened, and the vacuum generator vacuum gear pump drives the motor to run for several minutes in the forward and reverse directions at low speed until all the residual media in the pump cavity and the inlet and outlet pipelines are sucked away by the vacuum generator and discharged from the overflow pipe, so that the vacuum-pumping cleaning work is completed.

The above only is the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all of which are in the utility model discloses a conceive, utilize the equivalent structure transform that the content of the specification and the attached drawings did, or directly/indirectly use all to include in other relevant technical fields the protection scope of the present invention.

Claims (8)

1. A vacuum pumping gear pump of a vacuum generator is characterized by comprising a pump cavity and a vacuum pumping mechanism, wherein a front end cover is arranged on the pump cavity, the pump cavity is connected with the vacuum pumping mechanism through the front end cover, the vacuum pumping mechanism comprises the vacuum generator, an air inlet source regulating valve, a first stop ball valve switch and a second stop ball valve switch, the first stop ball valve switch is arranged at the lower end of the vacuum generator and is connected with the front end cover, and the second stop ball valve switch is arranged at one side of the vacuum generator and is connected with the air inlet source regulating valve; an inlet channel is arranged in the front end cover, an outlet channel is arranged on the opposite side of the inlet channel, a through hole is formed in the direction of the inlet channel, and the through hole is connected with a first cut-off ball valve switch; the pump cavity is internally provided with a driving gear and a driven gear which are mutually meshed, and the inlet channel of the front end cover is communicated with the outlet channel through a gap between the gears of the driving gear and the driven gear and the pump cavity.

2. The vacuum generator gear pump vacuum pump of claim 1, wherein the through hole is disposed above the inlet channel of the front end cap.

3. The vacuum generator gear pump for vacuum pumping of claim 1, wherein the inlet channel is connected to a flange and a quick connect coupling, and the through hole is provided in the flange or the quick connect coupling.

4. The vacuum generator gear pump as claimed in claim 2 or 3, wherein the through hole is a circular through hole, a threaded hole is provided on the circular through hole, and the circular through hole is connected with the first ball-stop valve switch through the threaded hole.

5. The vacuum gear pump as claimed in any one of claims 1 to 3, wherein the second cut-off ball valve switch is connected with the air inlet source regulating valve through an air pipe.

6. The vacuum gear pump as claimed in any one of claims 1 to 3, wherein the vacuum generator is provided with an air outlet end at the upper end, and the air outlet end is connected with an overflow air pipe.

7. The vacuum gear pump as claimed in any one of claims 1 to 3, wherein the air outlet end of the vacuum generator comprises an annular hole, an air injection hole and an air outlet which are communicated from bottom to top.

8. The vacuum generator gear pump as claimed in any one of claims 1 to 3, wherein an air inlet pipe is further provided on one side of the air inlet source regulating valve.

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