CN203560112U

CN203560112U - Vacuum-pumping structure

Info

Publication number: CN203560112U
Application number: CN201320631747.8U
Authority: CN
Inventors: 杨恢光; 刘海丰
Original assignee: Guangzhou Tech Long Packaging Machinery Co Ltd
Current assignee: Guangzhou Tech Long Packaging Machinery Co Ltd
Priority date: 2013-10-14
Filing date: 2013-10-14
Publication date: 2014-04-23
Anticipated expiration: 2023-10-14

Abstract

The utility model discloses a vacuum-pumping structure which comprises a return tank, wherein the return tank is communicated with the bottom of a filling machine through a pipeline; a vacuum-pumping pipeline and a liquid pump-out pipeline are communicated with the return tank; a liquid ring pump and a centrifugal pump are respectively arranged on the vacuum-pumping pipeline and the liquid pump-out pipeline; the return tank is further communicated with a detection pipeline; a vacuum pressure detection piece is connected to the detection pipeline, and can be used for detecting the vacuum pressure in the return tank and transmitting the pressure value to a PID controller; the vacuum-pumping pipeline is further communicated with a first air inlet pipeline, and a proportional valve is arranged on the first air inlet pipeline. The vacuum-pumping structure capable of automatically adjusting vacuum pressure can ensure constant pressure in the return tank and stable liquid backflow, so that the influence of converting filling bottle models or starting-up and halt on the liquid level of filling liquor is small, and the loss caused by disqualified liquid level is reduced.

Description

A kind of Vacuuming structure

Technical field

The utility model relates to the diversion return tank of hot filling machine, the particularly Vacuuming structure of return tank.

Background technique

While utilizing hot filling mechanical irrigation dress, filling process requires hot filling machine must be with return-flow structure, the one, can recovered material when filling temperature is inadequate, the 2nd, normally also have a small amount of backflow material when filling, because for the bottle that guarantees each valve is filled, filling time can be reserved certain surplus, and in the unnecessary filling time, material will be discharged filling machine by Vacuuming structure.Conventionally utilize the return tank being communicated with filling machine that unnecessary filling liquid is reclaimed, owing to being evacuated in return tank, and return tank is communicated with filling machine bottom by pipeline, therefore, unnecessary filling liquid is under self gravitation and vacuum action, in inflow return tank, and the liquid of recovery is done to other processing.At present, degree of vacuum in return tank is by manual tune, by manual tune, be connected in the valve port opening on return tank admission line, to control the amount of the atmosphere that enters return tank, simultaneously, use the water-ring pump being connected to equally on return tank to manufacture return tank inner vacuum environment, thereby make the vacuum keep of return tank in predetermined value.But; during due to conversion filling bottle type or startup-shutdown, capacity of reflux fluctuation is large; manual tune valve can not compensate its fluctuation in time; therefore; also be difficult to guarantee that vacuum keep in return tank is in predetermined value; thereby can not guarantee unnecessary liquid stabilising in filling machine, flow in return tank, in the bottle after having filled with, liquid level is obviously unstable, causes some losses.

Model utility content

The utility model aims to provide a kind of Vacuuming structure that can automatically regulate vacuum pressure in return tank.

A kind of Vacuuming structure described in the utility model, comprise the return tank being communicated with filling machine bottom by pipeline, on return tank, be communicated with vacuum lead and liquid pumps pipeline, vacuum lead and liquid pump and on pipeline, are respectively arranged with water-ring pump and centrifugal pump, on return tank, be also communicated with detection pipeline, on it, be connected with the vacuum-pressure detection part that can detect the interior vacuum pressure of return tank and force value be passed to PID controller, on vacuum lead, be also communicated with the first admission line, on it, be provided with Proportional valve.

On described the first admission line, be communicated with the second admission line, on the second admission line, manual ball valve be set.

A kind of Vacuuming structure described in the utility model, its return tank is communicated with filling machine bottom by pipeline, and because water-ring pump vacuumizes processing repeatedly to return tank, can guarantee in return tank in vacuum state, therefore, in filling machine, unnecessary filling liquid flows in return tank under self gravitation and vacuum action, and fast the liquid in return tank is extracted out by centrifugal pump, does other processing; On return tank, by detecting pipeline, be connected with vacuum-pressure detection part, when vacuum pressure detection piece detects that vacuum pressure value in return tank is not setting value, this signal is passed to PID controller, now PID controller sends command adapted thereto, the aperture size of control ratio valve is to control the gas flow entering in the first admission line, thereby the vacuum pressure in assurance return tank is all the time in constant state.On the first admission line, be communicated with the second admission line, on the second admission line, be also provided with manual ball valve, the valve port of manual ball valve is opened to a certain size, thereby guarantee that the atm number that enters from the second admission line can not affect the vacuum pressure in return tank, when Proportional valve breaks down can not normally move time, atmosphere can normally enter from the second admission line, not affecting liquid backflow enters in return tank, the normal operation of maintenance equipment, meanwhile, is also convenient to the maintenance of comparative example valve.This kind can regulate the Vacuuming structure of vacuum pressure automatically; can not only guarantee that return tank internal pressure is constant; can also guarantee that liquid backflow is stable, thereby conversion filling bottle type or startup-shutdown etc. are all very little on the liquid level impact of filling liquid, have reduced the loss causing because liquid level is defective.

Accompanying drawing explanation

Fig. 1 is Vacuuming structure schematic diagram of the present utility model.

Embodiment

A kind of Vacuuming structure, as shown in Figure 1, comprise the return tank 1 being communicated with filling machine bottom by pipeline, on return tank 1, be communicated with vacuum lead 2 and liquid and pump pipeline 3, vacuum lead 2 and liquid pump and on pipeline 3, are respectively arranged with water-ring pump 4 and centrifugal pump 5, on return tank 1, be also communicated with and detect pipeline 6, on it, be connected with the vacuum-pressure detection part 7 that can detect the interior vacuum pressure of return tank and force value be passed to PID controller, on vacuum lead 2, be also communicated with the first admission line 8, on it, be provided with Proportional valve 9.

On described the first admission line 8, be communicated with on the second admission line 10, the second admission lines 10 manual ball valve 11 is set.

Liquid pumps pipeline 3 and is communicated with return tank bottom, and liquid is more easily drawn out of, and centrifugal pump 5 power losss are less.

On return tank 1, be communicated with detergent line 12, from then on pipeline water flowing enters return tank 1, and tank interior is cleaned, and the water after cleaning can have centrifugal pump 5 to extract return tank 1 out.

Return tank 1 bottom is also communicated with blowdown piping 13, manual ball valve 11 is set on blowdown piping 13, usually under state, this manual ball valve 11 is in buttoned-up status, when also surplus in return tank 1, have while not being centrifuged the liquid that pump 5 extracts out, open the manual ball valve 11 on blowdown piping 13, these remaining liqs will all be discharged from blowdown piping 13.

Claims

1. a Vacuuming structure, comprise the return tank (1) being communicated with filling machine bottom by pipeline, on return tank (1), be communicated with vacuum lead (2) and liquid and pump pipeline (3), vacuum lead (2) and liquid pump and on pipeline (3), are respectively arranged with water-ring pump (4) and centrifugal pump (5), it is characterized in that: on return tank (1), be also communicated with and detect pipeline (6), on it, be connected with the vacuum-pressure detection part (7) that can detect the interior vacuum pressure of return tank and force value be passed to PID controller, on vacuum lead (2), be also communicated with the first admission line (8), on it, be provided with Proportional valve (9).

2. a kind of Vacuuming structure according to claim 1, is characterized in that: upper the second admission line (10) that is communicated with of described the first admission line (8), arranges manual ball valve (11) on the second admission line (10).

3. a kind of Vacuuming structure according to claim 1, is characterized in that: liquid pumps pipeline (3) and is communicated with return tank bottom.

4. a kind of Vacuuming structure according to claim 1, is characterized in that: on return tank (1), be communicated with detergent line (12).

5. a kind of Vacuuming structure according to claim 1, is characterized in that: return tank (1) bottom is also communicated with blowdown piping (13), and manual ball valve (11) is set on blowdown piping (13).