CN2767781Y

CN2767781Y - High negative pressure big flow rotary gas valve

Info

Publication number: CN2767781Y
Application number: CN 200520039204
Authority: CN
Inventors: 林锦良
Original assignee: SHANGHAI INST OF POSTAL SCIENCE
Current assignee: SHANGHAI INST OF POSTAL SCIENCE
Priority date: 2005-01-24
Filing date: 2005-01-24
Publication date: 2006-03-29
Anticipated expiration: 2015-01-24

Abstract

The utility model discloses a high negative pressure big flow rotary gas valve which comprises a suction board, a backboard and a rotary disc, wherein two suction openings are arranged on the suction board, and the rotary disc is clamped between the suction board and the backboard, and is tightly jointed with the suction board and the backboard. A central shaft of the rotary disc is connected with a servo motor fixed on the backboard, and two air holes are arranged on the backboard, and are coaxial with the two suction openings arranged on the suction board. One or a plurality of through holes which can alternatively communicate the first air hole and the first suction opening or communicate the second air hole and the second suction opening are arranged on the rotary disc. The opening and the closing of the two gas paths are controlled by the rotation of the middle rotary disc by the utility model, and the bearing resistance of the rotation motion of the rotary disc has a little relation with the size of the airflow negative pressure. Thus, the utility model can bear very high negative pressure, and has a good separation effect. The utility model also has the characteristics of simple structure and low failure rate.

Description

High negative pressure large flow rotary air valve

Technical field

The utility model relates to a kind of negative-pressure air valve, can be used for being used in the device such as postage machine separating, absorption letter or other thin slice class article.

Background technique

In the segregating unit of postage machine, generally be to adopt negative pressure separation air valve to adsorb mail it is separated.Separating on the air valve has former and later two negative pressure suction inlets, and these two negative pressure suction inlet alternating actions can guarantee that mail can be separated reliably, and the alternating action of two negative pressure suction inlets also is referred to as " double-click ".Present state-of-the-art separation air valve is that electromagnet-diaphragm type separates air valve, but this separation air valve still exists following deficiency:

1) tightness can influence the double-click to letter, so very high to the tightness requirement of valve, this has just increased the difficulty of processing and assembling.If tightness is bad, gas leakage will influence each other between two suction inlets in relative confined space, and that should not inhale also has suction, can't suck on the contrary of this suction.

2) the negative pressure height can influence the reciprocating degree of flexibility of film, and negative pressure is high more, and the motion of diaphragm is just dumb more.So it is when the mail more than the absorption 10mm,, just quite difficult because required negative pressure is higher.

3) to the requirement height of diaphragm.Diaphragm withstands shocks, so its impact toughness a _kValue requires high, has higher rigidity and hardness simultaneously again.In actual use, diaphragm regular meeting breaks.

The model utility content

The technical problems to be solved in the utility model provides a kind of large flow gas valve that can bear high negative pressure.

In order to solve the problems of the technologies described above, the utility model adopts following technological scheme: a kind of high negative pressure large flow rotary air valve, comprise a suction disc, two suction inlets are arranged on the described suction disc, also comprise a backboard and a rotating disk, described rotating disk be clipped between suction disc and the backboard and and suction disc, backboard fits tightly, the central shaft of rotating disk is connected with actuating motor on being fixed on backboard, described backboard is provided with two pores, described two pores respectively with suction disc on two suction inlets coaxial, described rotating disk is provided with one or more through holes that can alternately first pore be communicated with first suction inlet or second pore is communicated with second suction inlet.

The utlity model has following beneficial effect: 1, the utility model is controlled opening and closing of two gas channels by the rotation of middle rotating disk, the rotatablely move relation of the resistance that born and air-negative-pressure size of rotating disk is little, therefore even under very high negative pressure, but air valve of the present utility model proper functioning still.Can be used to separate the mail of thickness below 20mm fully.

2, air valve of the present utility model is to bubble-tight less demanding, even there is gas leakage the joint of rotating disk and backboard, suction disc, yet direct and atmosphere short circuit can not influence each other between two suction inlets, can not influence double-click, can guarantee separating effect preferably.

3, the utility model is simple in structure, and is not high to the required precision of processing and assembling simultaneously, also greatly reduces the difficulty of manufacturing.

4, the moving element in the utility model is the fixed rotating disk of comparatively robust, and is that rotation is moving moving, does not impact, and can not resemble easy breaking the film, so rate of fault is low.

Description of drawings

Fig. 1 is the structural representation of a kind of high negative pressure large flow rotary air valve of the present utility model.

Fig. 2 is the through hole on the rotating disk and position, the hole distribution schematic diagram of two pores on the backboard.

Fig. 3 is position, the hole distribution schematic diagram that two pores on two through holes and the backboard are arranged on the rotating disk.

Fig. 4 is position, the hole distribution schematic diagram that two pores on five uniform through holes and the backboard are arranged on the rotating disk.

Fig. 5 is position, the another kind of hole distribution schematic diagram that two pores on two through holes and the backboard are arranged on the rotating disk.

Embodiment

Below in conjunction with the drawings and the specific embodiments the utility model is elaborated.

As shown in Figure 1 and Figure 2, backboard 2, rotating disk 3, suction disc 4 fit tightly together, and actuating motor 1 is installed on the backboard 2, and the center hole that the central shaft of rotating disk 3 passes backboard 2 is connected with actuating motor 1.Two

pores

21,22 are arranged on backboard 2,

pore

21,22 is connected with sourceof negative pressure in use, on suction disc 4, there are two suction inlets 41,42 coaxial with

pore

21,22 respectively, on rotating disk 3, be provided with a through hole 31, rotation angle by actuating motor 1 control rotating disk 3, through hole 31 can make first suction inlet 41 be communicated with first pore 21 and produce negative pressure, and this moment, second suction inlet 42 was in closed condition by rotating disk 3 sealings; Through after the certain time interval, actuating motor 1 rotates rotating disk 3, and through hole 31 makes second suction inlet 42 be communicated with second pore 22 and produces negative pressure, and this moment, first suction inlet then was in closed condition, and air valve has just been finished one and double-clicked action like this.

Fig. 3 to Fig. 5 shows the other form that the position, hole on rotating disk 3 and the backboard 2 distributes, two through holes 31 also can be arranged on the rotating disk 3, as shown in Figure 3, by the rotation of rotating disk 3, can only have a through hole 31 to be connected, but two through holes can shorten the time lag between the double-click with pore 21 or 22.Fig. 4 is a kind of five rotating disks that through hole is uniform that have, 36 ° of rotating disk 3 revolutions, pore 21 on the

backboard

2 and 22 break-make will conversion once.Fig. 5 is represented be rotating disk 3 with backboard 2 on the asymmetrically distributed a kind of situation in position, hole, but two through holes 31 on the rotating disk 3 still can form alternately break-make relation with

pore

21,22.

Position, the hole distribution situation of rotating disk 3 and backboard 2, suction disc 4 is not limited to above cited several; can also do a variety of conversion; in any case but conversion; so long as utilize rotating disk and on through hole control the break-make of gas circuit; all can realize the purpose of this utility model, all within protection domain of the present utility model.

Claims

1. high negative pressure large flow rotary air valve, comprise a suction disc (4), two suction inlets (41 are arranged on the described suction disc (4), 42), it is characterized in that: also comprise a backboard (2) and a rotating disk (3), described rotating disk (3) be clipped between suction disc (4) and the backboard (2) and with suction disc (4), backboard (2) fits tightly, the central shaft of rotating disk (3) is connected with actuating motor (1) on being fixed on backboard (2), described backboard (2) is provided with two pores (21,22), described two pores (21,22) respectively with suction disc (4) on two suction inlets (41,42) coaxial, described rotating disk (3) is provided with one or more through holes (31) that alternately first pore (21) are communicated with first suction inlet (41) or second pore (22) is communicated with second suction inlet (42).