CN102951319A

CN102951319A - Negative-suction leak-proof filling valve

Info

Publication number: CN102951319A
Application number: CN2011102400984A
Authority: CN
Inventors: 苏武会; 石卓栋; 徐志刚
Original assignee: BEIJING SPACE STAR TECHNOLOGY EQUIPMENT Co; TIANJIN AEROSPACE STAR NEW TECHNOLOGY EQUIPMENT CO LTD; China Academy of Launch Vehicle Technology CALT; Beijing Institute of Structure and Environment Engineering
Current assignee: BEIJING SPACE STAR TECHNOLOGY EQUIPMENT Co; TIANJIN AEROSPACE STAR NEW TECHNOLOGY EQUIPMENT CO LTD; China Academy of Launch Vehicle Technology CALT; Beijing Institute of Structure and Environment Engineering
Priority date: 2011-08-19
Filing date: 2011-08-19
Publication date: 2013-03-06
Anticipated expiration: 2031-08-19
Also published as: CN102951319B

Abstract

The invention relates to a liquid filling machine, belongs to the field of packaging equipment, and particularly relates to a negative-suction leak-proof filling valve. The negative-suction leak-proof filling valve comprises a valve body and a valve port hermetically connected with the lower end of the valve body. A feed inlet is reserved at the upper end of the valve body, a valve stem and a valve spool are arranged at the center of a material cavity formed by the valve body and the valve port in a surrounding manner, the upper end of the valve rod penetrates through the upper portion of the valve body, the lower end of the valve rod is in slide connection with the valve spool hermetically, the lower end of the valve spool is fit with the valve port, the valve stem is connected with the valve spool through a sealing ring, a piston is arranged at the lower end of the valve stem, a spring is mounted between the piston and the lower end face of the inner side of the valve spool, and an inner guide pillar is arranged inside the valve spool and is hermetically connected with the inner side of the piston. A negative suction cavity A is formed between the sealing ring and the piston, and a transitional cavity B is formed between the piston and the inner guide pillar. Holes communicated with the inner cavity of the piston are respectively reserved at centers of the lower end of the valve stem, the lower end of the valve spool and the inner guide pillar, a hole communicated with a material cavity is reserved on the lower portion of the valve spool, and a hole communicating the negative suction cavity A with the inner cavity of the piston is reserved on the valve stem.

Description

Self negative suction anti-dropwise-leakage filling valve

Technical field

The present invention relates to liquid-filling machine, belong to packaging facilities, be specifically related to a kind of Self negative suction anti-dropwise-leakage filling valve.

Background technology

The form of liquid-filling machine is varied, and in the liquid-filling machine field, one of critical component that determines the bottle placer technical merit is exactly filling valve, and the structure of filling valve has directly determined filling quality and effect.

In order to guarantee to pack quality, require after filling valve is closed, can not have material to drip to the packing container outside, namely require not water clock of bottle placer.And for liquid-filling machine, filling valve is closed the rear minimal residue material that has unavoidably, and the relatively large material of viscosity especially is such as cooking oil, lubricated wet goods.

Therefore, liquid-filling machine generally all can arrange Anti-dripping device.At present, the most frequently used antidrip measure has two kinds: a kind of is the negative antidrip method of inhaling, and a kind of is the groove antidrip method that connects material.The negative antidrip method of inhaling is all to be provided with elongated hole in the middle of filling valve spool and valve rod, and this hole communicates with taking out negative pressure equipment, and salvage stores is taken away.The groove antidrip method that connects material is that the groove that connects material is set under filling valve, and during can, the groove that connects material is return original position, and when filling valve was closed, the groove that connects material stretched out, and places the filling valve below, with the liquid collection of water clock, avoids it to pollute packing container, and the liquid after the collection is concentrated discharging again.

Above-mentioned two kinds of shortcomings that drip-proof method exists:

1. the negative antidrip method of inhaling needs the equipment such as vacuum generator, needs the salvage stores gathering-device, and cost is relatively high.Need regularly the salvage stores of collecting to be cleared up, increased the operating time.In addition, the salvage stores of collecting often can not satisfy quality requirements, has caused the waste of material.

2. the relatively negative suction method of the groove antidrip method that connects material is simple in structure, and the material that still also needs to collect is cleared up, and has also caused the waste of material simultaneously.In addition, because the existence of the groove that connects material being arranged between by container filling and can valve port, cause can method mouth and vessel port apart from larger, increased the precise positioning difficulty of vessel port.

Summary of the invention

The object of the invention is to propose a kind of new filling liquid antidrip method, namely when filling valve is closed, the filling valve valve core inside forms the negative chamber of inhaling again, to reach the negative drip-proof effect of inhaling, finally provide a kind of and can improve can efficient, reduce the liquid material loss, thus the Self negative suction anti-dropwise-leakage filling valve that reduces production costs.

Realize the technical scheme of the object of the invention: a kind of Self negative suction anti-dropwise-leakage filling valve, comprise valve body 9, the valve port 1 that is tightly connected with valve body 9 lower ends, valve body 9 upper ends have inlet point 11, valve body 9 is provided with valve rod 10 and spool 2 with the center of the material cavity 13 that valve port 1 surrounds, valve body 9 tops are passed in valve rod 10 upper ends, valve rod 10 lower ends and spool 2 sealed sliding are dynamically connected, the lower end of spool 2 and valve port 1 are fitted, it is characterized in that: be connected by seal ring 12 between described valve rod 10 and the spool 2, valve rod 10 lower ends are provided with piston 6, between piston 6 and the spool 2 inside lower end faces spring 3 is installed, spool 2 inside are provided with in-core guidepost 5, and described in-core guidepost 5 is connected with piston 6 inner seals; Form the negative chamber A of suction between seal ring 12 and the piston 6, form adapter cavity B between piston 6 and the in-core guidepost 5; The center of valve rod 9 lower ends, spool 2 lower ends and in-core guidepost 5 all has the hole that communicates with piston cavity, and spool 2 bottoms have the hole that communicates with material cavity 13, and valve rod 10 has the hole that is communicated with the negative chamber A of suction and piston cavity.

Aforesaid a kind of Self negative suction anti-dropwise-leakage filling valve is characterized in that: be provided with outer guide sleeve 7 between described valve body 9 and the spool 2, and outer guide sleeve 7 and spool 2 bearing fits, outer guide sleeve 7 lower ends are provided with sleeve 4.

Aforesaid a kind of Self negative suction anti-dropwise-leakage filling valve is characterized in that: described outer guide sleeve 7 is the annulus shape.

Aforesaid a kind of Self negative suction anti-dropwise-leakage filling valve is characterized in that: be threaded connection between described spool 2 and the in-core guidepost 5.

Aforesaid a kind of Self negative suction anti-dropwise-leakage filling valve is characterized in that: described valve body 9 lower ends and valve port 1 are tightly connected by seal ring 8, and valve rod 10 is tightly connected by seal ring 8 with valve body 9.。

Effect of the present invention is: because this filling valve has been done particular design with spool, so when closing spool, spool can suck valve core cavity with the salvage stores of can spool below, when driving valve next time, again intracavity liquid is poured in the packing container, whole process is finished automatically, do not need other Anti-drip-leakage mechanisms, can not cause the waste of liquid material, improve can efficient, reduce productive costs.

Description of drawings

Fig. 1 is the structural representation of a kind of Self negative suction anti-dropwise-leakage filling valve provided by the present invention;

Fig. 2 be among Fig. 1 I-I to cutaway view;

Fig. 3 is the structural representation that a kind of Self negative suction anti-dropwise-leakage filling valve provided by the present invention is in closed condition;

Fig. 4 is the structural representation that a kind of Self negative suction anti-dropwise-leakage filling valve provided by the present invention is in closed condition.

Among the figure: 1. valve port; 2. spool; 3. spring; 4. sleeve; 5. in-core guidepost; 6. piston; 7. outer guide sleeve; 8. seal ring; 9. valve body; 10. valve rod; 11. inlet point; 12. seal ring; 13. material cavity.

The specific embodiment

The invention will be further described below in conjunction with drawings and Examples.

As depicted in figs. 1 and 2, a kind of Self negative suction anti-dropwise-leakage filling valve, the valve port 1 that comprises valve body 9, is tightly connected with valve body 9 lower ends, valve body 9 upper ends have inlet point 11, valve body 9 is provided with valve rod 10 and spool 2 with the center of the material cavity 13 that valve port 1 surrounds, valve body 9 tops are passed in valve rod 10 upper ends, and valve rod 10 lower ends and spool 2 sealed sliding are dynamically connected, and the lower end of spool 2 and valve port 1 are fitted.Be connected by seal ring 12 between valve rod 10 and the spool 2, valve rod 10 lower ends are provided with piston 6, between piston 6 and the spool 2 inside lower end faces spring 3 are installed, and spool 2 inside are provided with in-core guidepost 5, and described in-core guidepost 5 is connected with piston 6 inner seals; Form the negative chamber A of suction between seal ring 12 and the piston 6, form adapter cavity B between piston 6 and the in-core guidepost 5; The center of valve rod 9 lower ends, spool 2 lower ends and in-core guidepost 5 all has the hole that communicates with piston cavity, and spool 2 bottoms have the hole that communicates with material cavity 13, and valve rod 10 has the hole that is communicated with the negative chamber A of suction and piston cavity.Be provided with outer guide sleeve 7 between valve body 9 and the spool 2, outer guide sleeve 7 lower ends are provided with sleeve 4.Spool 2 cooperatively interacts with outer guide sleeve 7, but relative sliding, and 7 pairs of spools 2 of outer guide sleeve play directional tagging, make the O-ring conical surface on its accurate and valve port 1 bonded to each other, finish sealing and the closing movement of filling valve.

Working process and the principle of a kind of Self negative suction anti-dropwise-leakage filling valve provided by the invention are as follows:

When filling valve was closed, as shown in Figure 3, outside actr band ovable valve stem 10 moved downward, and valve rod 10 band movable valve plugs 2 move downward together, and when spool 2 was fitted with valve port 1 sealing surface, filling valve was closed, and stops can.At this moment, actr band ovable valve stem 10 overcomes spring 3 elastic force to be continued to move downward, this moment, the volume of the negative chamber A of suction increased, the volume of adapter cavity B reduces, because the negative volume of inhaling chamber A is pushed the speed greater than the speed that reduces of adapter cavity B, so form a negative pressure state at spool 2 center pores, this negative pressure state can suck the salvage stores of spool 2 bottoms the negative chamber A of suction.

When filling valve is opened, as shown in Figure 4, actr band ovable valve stem 10 upward movements, valve rod 10 lower end pistons 6 are upward movement simultaneously, because the effect of spring 3, this moment, spool 2 still was in the state of fitting tightly with valve port 1.Because spool 2 is static, piston 6 upward movements, the negative volume of inhaling chamber A reduces, simultaneously adapter cavity B volume increases, and the negative volume of inhaling chamber A reduces speed greater than the pushing the speed of adapter cavity B, so, material unnecessary among the negative chamber A of suction will be discharged by the centre hole of spool 2, pour into container filling.Thereby do not produce the waste of any material.

Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.If these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims

1. Self negative suction anti-dropwise-leakage filling valve, comprise valve body (9), the valve port (1) that is tightly connected with valve body (9) lower end, valve body (9) upper end has inlet point (11), valve body (9) is provided with valve rod (10) and spool (2) with the center of the material cavity (13) that valve port (1) surrounds, valve body (9) top is passed in valve rod (10) upper end, valve rod (10) lower end and spool (2) sealed sliding are dynamically connected, the lower end of spool (2) and valve port (1) are fitted, it is characterized in that: be connected by seal ring (12) between described valve rod (10) and the spool (2), valve rod (10) lower end is provided with piston (6), between piston (6) and spool (2) the inside lower end face spring (3) is installed, spool (2) inside is provided with in-core guidepost (5), and described in-core guidepost (5) is connected with piston (6) inner seal; Form the negative chamber A of suction between seal ring (12) and the piston (6), form adapter cavity B between piston (6) and the in-core guidepost (5); The center of valve rod (9) lower end, spool (2) lower end and in-core guidepost (5) all has the hole that communicates with piston cavity, spool (2) bottom has the hole that communicates with material cavity (13), and valve rod (10) has the hole that is communicated with the negative chamber A of suction and piston cavity.

2. according to a kind of Self negative suction anti-dropwise-leakage filling valve claimed in claim 1, it is characterized in that: be provided with outer guide sleeve (7) between described valve body (9) and the spool (2), outer guide sleeve (7) and spool (2) bearing fit, outer guide sleeve (7) lower end is provided with sleeve (4).

3. according to a kind of Self negative suction anti-dropwise-leakage filling valve claimed in claim 1, it is characterized in that: described outer guide sleeve (7) is the annulus shape.

4. according to a kind of Self negative suction anti-dropwise-leakage filling valve claimed in claim 1, it is characterized in that: be threaded connection between described spool (2) and the in-core guidepost (5).

5. according to a kind of Self negative suction anti-dropwise-leakage filling valve claimed in claim 1, it is characterized in that: described valve body (9) lower end and valve port (1) are tightly connected by seal ring (8), and valve rod (10) is tightly connected by seal ring (8) with valve body (9).