WO2022022456A1

WO2022022456A1 - Gas-containing liquid filling valve

Info

Publication number: WO2022022456A1
Application number: PCT/CN2021/108424
Authority: WO
Inventors: 沈军; 高擎宇; 张虎
Original assignee: 江苏新美星包装机械股份有限公司
Priority date: 2020-07-31
Filing date: 2021-07-26
Publication date: 2022-02-03
Also published as: CN111943114A

Abstract

A gas-containing liquid filling valve, comprising a valve body (1) and a valve rod (2). A driving chamber (3) and a buffer chamber (4) are sequentially arranged in the valve body at the top of a valve chamber (11) from bottom to top; the valve chamber, the driving chamber, and the buffer chamber are sequentially sealed and separated from each other; the upper end of the valve rod extends into the buffer chamber; an upper port of an air return channel (21) is communicated with the buffer chamber; the valve body is provided with an air discharge channel (14); a lower port of the air discharge channel is communicated with a valve port (12); the upper end of the air discharge channel is respectively connected to a negative pressure switch valve (7) and an air discharge switch valve (6) provided on the valve body; the negative pressure switch valve is communicated with a negative pressure chamber (72) by means of a negative pressure pipeline (71); the air discharge switch valve is communicated with an air discharge chamber (8) by means of an air discharge pipeline (61); a gas switch valve (9) is provided on the valve body outside the buffer chamber; the gas switch valve is communicated with a gas chamber (10) by means of a filling pipeline (91). The gas-containing liquid filling valve can realize two filling processes according to actual needs, thereby improving use flexibility.

Description

A gas-containing liquid filling valve

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of the Chinese Patent Application No. 202010759321.5 filed with the China Patent Office on July 31, 2020, the entire contents of which are incorporated herein by reference.

technical field

The invention relates to the technical field of filling equipment, in particular to a filling valve.

Background technique

Gaseous liquids, such as cola, beer, etc., usually contain carbon dioxide as the gas. According to different shelf life requirements, there are mainly two different filling processes for gas-containing liquid filling: first, inject gas into the bottle first, and then fill; second, extract the air from the bottle first, and then inject gas into the bottle , followed by filling. These two different filling processes usually require two different filling valves, which brings a lot of inconvenience to production.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a gas-containing liquid filling valve, which can be applied to at least two different filling processes for filling production and has wide applicability.

In order to solve the above-mentioned problems, the first technical scheme adopted by the present invention is:

A gas-containing liquid filling valve, comprising a valve body and a valve stem, the valve body is provided with a valve cavity, the bottom of the valve body is provided with a valve port, the valve port is located below the valve cavity, the valve The rod extends in the up-down direction and is arranged in the valve cavity so as to be relatively movable in the up-down direction, the valve rod has a return air passage extending through the up-down direction, the valve cavity is connected with a liquid inlet pipe, and the valve body It has a valve opening state and a valve closing state that are switched by the up and down movement of the valve stem. When the valve is in the open state, the valve cavity and the valve port communicate with each other; when the valve is in the closed state, the valve port is connected to the valve. The valve cavities are separated from each other, a buffer cavity is provided on the top of the valve body, the buffer cavity is located above the valve cavity on the valve body, and the buffer cavity and the valve cavity are not communicated with each other, The upper end of the valve rod is located in the buffer cavity, and the upper port of the air return channel is communicated with the buffer cavity. The filling valve also includes a valve body that is connected to the buffer cavity. A gas switch valve connected to and used for filling gas into the cache cavity, the filling valve further includes a negative pressure switch valve and an exhaust switch valve respectively arranged on the valve body, the negative pressure switch The valve is connected to the negative pressure chamber through a negative pressure pipeline, and the exhaust switch valve is connected to the exhaust chamber through an exhaust pipeline. Two ports on the device, one of which is communicated with the valve port, and the other port is respectively connected with the negative pressure switch valve and the exhaust switch valve.

Preferably, the exhaust passage extends in an up-down direction on the valve body, a lower port of the exhaust passage is always communicated with the valve port, and an upper port of the exhaust passage is respectively connected to the negative The pressure switch valve and the exhaust switch valve are connected.

Preferably, the upper part of the valve body is further provided with a drive cavity, the buffer cavity, the drive cavity and the valve cavity are distributed on the valve body in order from top to bottom and are not communicated with each other. The valve installation further includes a power mechanism for driving the valve rod to move up and down, the power mechanism at least includes a piston fixed on the valve rod, and the piston is set in the driving cavity.

In some embodiments, a sealing blocking structure for sealing and blocking the driving cavity and the buffer cavity is further provided between the valve stem and the valve body, and the sealing blocking structure includes a sealing member and a guide sleeve, the sealing member is made of a flexible material and is fixed on the valve stem, and the inner peripheral portion of the sealing member is sealed with the outer peripheral portion of the valve stem, and the guide sleeve is fixed The outer peripheral part of the upper part of the guide sleeve is sealed with the valve body, and the outer peripheral part of the sealing member is fixed on the upper part of the guide sleeve and is connected with the The guide sleeves are sealedly arranged, and a buffer space is formed between the sealing member and the guide sleeve, the buffer space and the buffer cavity are not communicated with each other, and the piston is connected to the inner wall of the drive cavity. The outer wall of the guide sleeve can move up and down respectively.

In some embodiments, preferably, the sealing member includes an annular sealing sleeve, and a sealing body disposed outside the sealing sleeve, the sealing sleeve is fixedly disposed on the valve stem, and the sealing sleeve is The inner peripheral part of the valve stem and the outer peripheral part of the valve stem are mutually sealed, and the upper part of the guide sleeve is provided with a guide sleeve partition part, and the guide sleeve partition part is gradually opened radially outward from bottom to top. In the shape of a bell mouth, the outer peripheral part of the sealing body is fixedly and relatively sealedly arranged on the upper part of the dividing part of the guide sleeve.

In some embodiments, further, the top of the guide sleeve partition is fixedly embedded in the inner wall of the valve body, the top of the guide sleeve partition is provided with an annular sealing groove, and the sealing body has an annular sealing groove. The bottom of the outer end has a downwardly protruding sealing protrusion, the sealing body is embedded between the guide sleeve partition and the valve inner wall, and the sealing protrusion is sealingly embedded in the sealing groove middle.

In some embodiments, the sealing body is integrally provided with the sealing sleeve, and the sealing body extends radially outward from the outer peripheral portion of the sealing sleeve in an arc-shaped bending manner.

In some embodiments, the sealing and blocking structure further includes a shaft sleeve fixedly sleeved on the valve stem, the shaft sleeve is located below the sealing member, and the guide sleeve can be sleeved relatively slidably On the outer peripheral portion of the shaft sleeve, a retaining ring is fixedly formed at the lower part of the shaft sleeve, the retaining ring is located in the driving cavity, and the piston is fixed above the retaining ring.

In some embodiments, a fixing sleeve is threadedly connected to the top of the valve stem, and the sealing member is axially compressed between the fixing sleeve and the shaft sleeve.

In some embodiments, a corrugated sleeve is sleeved on the outer periphery of the valve stem, the corrugated sleeve is always located in the valve cavity, and the lower end of the corrugated sleeve is fixed on the valve stem The lower part is mutually sealed with the outer peripheral wall of the valve stem, the upper end of the corrugated sleeve is formed with a sealing ring, and the sealing ring is arranged in a sealing manner with the inner peripheral wall of the valve body, so that the The driving chamber and the valve chamber are isolated from each other and not communicated with each other.

In some embodiments, the valve stem has an initial position and a valve closing position on a movement path in the up-down direction, and when the valve stem is in the initial position, the valve body is in an open state; The valve stem is in the valve closing position, and the valve body is in the valve closing state. When the valve stem is converted from the initial position to the valve closing position, the valve stem is in the power mechanism. Under the action, it moves downward synchronously with the piston.

In some embodiments, the power mechanism further includes an elastic member that provides a force required for the upward movement of the piston, the piston is arranged in the driving chamber and divides the driving chamber into upper parts that are not communicated with each other A driving cavity and a lower driving cavity, the elastic member is arranged in the lower driving cavity, and a gas pipeline for connecting the upper driving cavity and a compressed gas source is also provided on the valve body.

In some embodiments, the elastic member is a spring, a spring seat is provided in the lower driving cavity, the upper and lower ends of the spring act on the bottom of the piston and the spring seat respectively, and the spring always There is a tendency to drive the piston upwards.

In some embodiments, a retaining ring is fixed on the bottom of the piston, a shaft sleeve is fixed on the valve stem, the retaining ring and the shaft sleeve are fixed to each other, and the upper end of the spring is pressed against the bottom of the retaining ring.

In some embodiments, the gas pipeline is communicated with the compressed air source through a solenoid valve, and when the valve body is switched from the valve-open state to the valve-closed state, the compressed air sequentially passes through the The solenoid valve and the gas pipeline enter the upper drive chamber, so that the piston drives the valve stem to move downward under the action of the pressure difference and reaches the valve closing position from the initial position; when the valve body During the transition from the closed valve state to the open valve state, the compressed air in the upper drive chamber is discharged out through the gas pipeline and the solenoid valve in turn, so that the piston is in the elastic state. The force of the component drives the valve stem to move downward and from the valve closing position to the initial position.

In some embodiments, a limiting ring is arranged in the upper driving cavity, and when the valve rod moves upward to the initial position, the piston upwardly abuts on the limiting ring.

The second technical scheme adopted by the present invention is:

A gas-containing liquid filling valve comprises: a valve body, a valve cavity is arranged in the valve body, a valve port is provided at the bottom of the valve body, a valve stem is arranged in the valve cavity, and the valve stem can move up and down to drive the valve body to be in the position between the valve port and the valve port. The valve opening state in which the valve cavity is connected or the valve closing state in which the valve port is separated from the valve cavity, the inside of the valve stem is axially penetrated to form a return air channel, the valve cavity is connected with a liquid inlet pipe, and the valve body at the top of the valve cavity is in order from bottom to top A drive cavity and a cache cavity are provided, the valve cavity, the drive cavity and the cache cavity are sealed and separated from each other in turn, the upper end of the valve stem extends into the cache cavity, the upper port of the return air passage is communicated with the cache cavity, and the valve body is provided with an exhaust gas The lower port of the exhaust channel is connected with the valve port, the upper end of the exhaust channel is respectively connected with the negative pressure switch valve and the exhaust switch valve arranged on the valve body, and the negative pressure switch valve is connected with the negative pressure through the negative pressure pipeline. The cavity is communicated, the exhaust switch valve is communicated with the exhaust cavity through the exhaust pipeline, the valve body outside the buffer cavity is provided with a gas switch valve, and the gas switch valve is communicated with the gas chamber through the filling pipeline.

In some embodiments, the upward and downward movement of the valve stem is driven by a power mechanism, and the power mechanism includes: a piston arranged in the drive chamber, the piston divides the drive chamber into an upper drive chamber and a lower drive chamber that are sealed and isolated from each other, the piston Connected with the valve stem, a spring and a spring seat are arranged in the lower drive chamber, the spring seat is fixed at the bottom of the lower drive chamber, and the upper and lower ends of the spring act on the bottom of the piston and the spring seat respectively; the spring always has the function of driving the piston to drive the valve. The tendency of the rod to move up to the initial position, when the valve rod is at the initial position, the valve body is in the open valve state; the upper drive chamber is connected with the gas pipeline, and the gas pipeline is connected with the compressed gas source through the solenoid valve; the compressed air can pass through in turn. The solenoid valve and the gas pipeline enter the upper drive chamber, so that the piston drives the valve stem to move down and compress the spring under the action of the pressure difference, until the valve stem moves so that the valve body is in a closed state; the compressed air in the upper drive chamber It can be discharged out through the solenoid valve, so that the piston is acted by the elastic force of the spring to drive the valve stem to return to the initial position.

In some embodiments, a limiting ring is arranged in the upper driving chamber, and the piston is blocked by the limiting ring when the piston drives the valve rod to move upward to the initial position, and the valve body is in the valve-open state at this time.

In some embodiments, a shaft sleeve is fixed on the upper end of the valve stem, a guide sleeve is fixed on the outside of the shaft sleeve, and a retaining ring is fixed on the bottom of the piston, the retaining ring is fixed with the shaft sleeve, and the upper end of the spring presses The block acts on the bottom of the retaining ring, the inner and outer sides of the piston are sealed with the inner wall of the driving chamber and the outer wall of the guide sleeve respectively, and the piston can move up and down on the inner wall of the driving chamber and the outer wall of the guide sleeve.

In some embodiments, the sealing partition structure between the buffer cavity and the driving cavity includes: a sealing member made of a flexible material between the buffer cavity and the driving cavity is sealed and separated, and the structure of the sealing member comprises: an annular seal There is a sealing body outside the sealing sleeve, the sealing sleeve is installed on the valve stem above the shaft sleeve, and the valve stem on the top of the sealing sleeve is provided with a fixing sleeve, the fixing sleeve and the valve stem are threadedly fixed, and the fixing sleeve seals the sealing sleeve. On the top of the shaft sleeve, the outer end of the sealing body is sealed and fixed with the inner wall of the valve; the upper end of the guide sleeve is connected with a guide sleeve partition, and the guide sleeve partition is from bottom to top, and gradually outward from the guide sleeve to the valve inner wall. The open bell mouth shape, the upper end of the sealing sleeve is sealed and embedded on the inner wall of the valve body, and a buffer space is formed between the sealing body and the partition part of the guide sleeve.

In some embodiments, a sealing groove is provided at the top of the dividing part of the guide sleeve embedded in the inner wall of the valve body, a sealing bump is provided at the bottom of the outer end of the sealing body, and the sealing body is sealingly embedded in the dividing part of the guiding sleeve and the valve body. between the walls, and the sealing bump is sealed and embedded in the sealing groove.

In some embodiments, a corrugated sleeve is sleeved on the valve stem in the valve cavity, the upper end of the corrugated sleeve forms a sealing ring, the sealing ring is sealed on the inner wall of the valve body, and the lower end of the corrugated sleeve is connected to the valve stem. The outer wall of the lower end of the seal is connected.

In some embodiments, the lower end of the valve stem gradually becomes thinner. When the valve body is in the closed valve state and when the bottle mouth is pressed against the bottom of the valve mouth, the lower port of the return gas pipeline is located at the bottle mouth position in the bottle mouth. .

Compared with the prior art, the invention has the following advantages: the gas-containing liquid filling valve can realize two different filling processes according to actual needs, has a wide application range, greatly improves the flexibility of use, and effectively reduces the cost of filling production enterprises. Cost of production. The filling valve has an ingenious structure and good sealing effect, which can greatly improve the filling quality and product quality.

Description of drawings

Fig. 1 is the structural representation of a kind of gas-containing liquid filling valve of the present invention;

2 is a schematic diagram of the arrangement of the negative pressure switch valve, the exhaust switch valve and the gas switch valve;

FIG. 3 is an enlarged schematic structural diagram of part A in FIG. 1 .

Among them: 1- valve body; 11- valve cavity; 12- valve port; 13- liquid inlet pipe; 14- exhaust channel;

2- valve stem; 21- air return channel; 22- shaft sleeve; 23- guide sleeve; 231- guide sleeve partition; 232- sealing groove; 24- retaining ring; 25- fixing sleeve; 26- corrugated sleeve; 261 - sealing ring;

3-drive cavity; 31-piston; 311-upper drive cavity; 312-lower drive cavity; 32-spring; 33-spring seat; 34-gas pipeline; 35-limiting retaining ring;

4-cache cavity;

5-seal part; 51-seal sleeve; 52-seal body; 521-seal bump;

6-exhaust switch valve; 61-exhaust pipeline;

7-negative pressure switch valve; 71-negative pressure pipeline; 72-negative pressure chamber;

8-exhaust chamber;

9-gas switch valve; 91-filling pipeline;

10-gas chamber; 20-bottle; 30-bottle clamping mechanism.

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments.

As shown in Figure 1, Figure 2, Figure 3, a gas-containing liquid filling valve includes a valve body 1 and a valve stem 2. A valve cavity 11 is arranged in the valve body 1, and a valve port 12 is opened at the bottom of the valve body 1. The rod 2 extends in the up-down direction and is arranged in the valve cavity 11 so as to be relatively movable in the up-down direction. The valve rod 2 has a return air passage 21 extending through the up-down direction. The valve cavity 11 is connected to the liquid inlet pipe 13 for sending the valve cavity 11 to supply liquid for filling. The valve body 1 has an open state and a closed state which are switched by the up and down movement of the valve stem 2. When the valve is in the open state, the valve cavity 11 and the valve port 12 communicate with each other; when the valve is in the closed state, the valve cavity 11 and the valve The ports 12 are separated from each other.

The top of the valve body 1 is provided with a buffer cavity 4 and a drive cavity 3 . The buffer cavity 4 , the drive cavity 3 and the valve cavity 11 are distributed in sequence from top to bottom and are sealed off from each other and not communicated with each other. The upper end of the valve rod 2 protrudes into the buffer chamber 4 , and the upper port of the return air passage 21 communicates with the buffer chamber 4 . The lower end of the valve stem 2 gradually becomes thinner. When the valve body 1 is in the closed valve state, and when the bottle mouth of the bottle 20 to be filled is pressed against the bottom of the valve mouth 12, the lower port of the return air pipe 21 is located in the bottle. The position of the bottle mouth in the mouth.

The filling valve also includes a negative pressure switch valve 7 and an exhaust switch valve 6 respectively arranged on the valve body 1. The negative pressure switch valve 7 communicates with the negative pressure chamber 72 through a negative pressure pipeline 71, and the exhaust switch valve 6 passes through The exhaust pipe 61 is communicated with the exhaust chamber 8 , and the valve body 1 is provided with an exhaust passage 14 , and the exhaust passage 14 has two ports at different ends in its own length direction, one of which is communicated with the valve port 12 . , and the other port is respectively connected with the negative pressure switch valve 7 and the exhaust switch valve 6 . Specifically, in this embodiment, the exhaust passage 14 extends in the up-down direction on the valve body 1 , the lower port of the exhaust passage 14 is always communicated with the valve port 12 , and the upper port of the exhaust passage 14 is respectively connected with the negative pressure switch. The valve 7 and the exhaust opening and closing valve 6 are connected. A gas switch valve 9 is also provided on the valve body 1 outside the buffer chamber 4 , and the gas switch valve 9 communicates with the gas chamber 10 through a filling pipeline 91 .

The filling valve also includes a power mechanism for driving the valve rod 2 to move up and down. The power mechanism includes a piston 31 arranged in the driving chamber 3. The valve rod 2 has an initial position and a valve closing position on the movement path in the up and down direction. , the valve stem 2 is in the initial position, the valve body 1 is in the valve open state; when the valve stem 2 is in the valve closing position, the valve body 1 is in the valve closing state, the piston 31 is relatively fixedly connected with the valve stem 2, when the valve stem 2 is in the valve closing state During the transition from the initial position to the closed valve position, the valve rod 2 moves downward synchronously with the piston 31 under the action of the power mechanism.

The power mechanism further includes an elastic member for providing the force required for the upward movement of the piston 31. In this embodiment, the elastic member is specifically a spring 32. The piston 31 divides the driving chamber 3 into an upper driving chamber 311 and a lower driving chamber 311 and a lower portion that are sealed and isolated from each other. The drive cavity 312, the bottom of the lower drive cavity 312 is fixedly provided with a spring seat 33, the upper and lower ends of the spring 32 act on the bottom of the piston 31 and the spring seat 33 respectively, the spring 32 always has the function of driving the piston 31 to drive the valve stem 2 to move upward. trend to the initial position.

The valve body 1 is also provided with a gas pipeline 34 for connecting the upper drive chamber 311 and the compressed gas source. The gas pipeline 34 communicates with the compressed gas source through a solenoid valve (not shown in the figure). When the valve body 1 is opened by the valve In the process of switching the state to the closed valve state, the compressed air enters the upper drive chamber 311 through the solenoid valve and the gas pipeline 34 in turn, so that the piston 31 drives the valve stem 2 to move downward under the action of the pressure difference and reaches the closed valve from the initial position. When the valve body 1 is switched from the closed valve state to the open valve state, the compressed air in the upper drive chamber 311 is discharged through the gas pipeline 34 and the solenoid valve in turn, so that the piston 31 is driven by the force of the spring 32 The valve stem 2 moves downward to reach the initial position from the closed valve position.

The upper drive chamber 311 is provided with a limit stop ring 35. When the piston 31 drives the valve stem 2 to move upward to the initial position, it is blocked by the limit stop ring 35. At this time, the valve body 1 is in an open state. The limiting ring 35 plays a very good limiting role.

Referring to FIG. 1 and FIG. 3 , between the valve stem 2 and the valve body 1, a sealing barrier structure for sealing and blocking the drive chamber 3 and the buffer chamber 4 is further provided. The sealing barrier structure includes a shaft sleeve 22, The sealing member 5 and the guide sleeve 23, wherein the sealing member 5 is made of a flexible material, and the sealing member 5 is fixed on the valve stem 2, and the inner peripheral portion of the sealing member 5 is sealed with the outer peripheral portion of the valve stem 2. ; The shaft sleeve 22 is fixedly sleeved on the upper end of the valve stem 2, the guide sleeve 23 is fixedly installed on the valve body 1 and can be relatively slidably sleeved on the outer periphery of the shaft sleeve 22, and the lower part of the shaft sleeve 22 is fixed A retaining ring 24 is formed in the ground, the retaining ring 24 is fixed on the shaft sleeve 22 or integrally provided with the shaft sleeve 22, the piston 31 is fixed above the retaining ring 24, and the spring 32 abuts against the bottom of the retaining ring 24. Acts on the piston 31 . The inner and outer sides of the piston 31 are sealed against the inner wall of the drive chamber 3 and the outer wall of the guide sleeve 23 respectively. The piston 31 can move up and down on the inner wall of the drive chamber 3 and the outer wall of the guide sleeve 23 respectively.

The upper outer peripheral portion of the guide sleeve 23 is sealed with the valve body 1 , the outer peripheral portion of the sealing member 5 is fixed on the upper portion of the guide sleeve 23 and is sealed with the guide sleeve 23 , and the sealing member 5 is sealed with the guide sleeve 23 . A buffer space 6 is formed between the sleeves 23 , and the buffer space 6 is not communicated with the buffer cavity 4 .

Specifically, the sealing member 5 includes an annular sealing sleeve 51 and a sealing body 52 disposed outside the sealing sleeve 51 . The portion extends radially outward in an arc-shaped curve. The sealing sleeve 51 is fixedly sleeved on the valve stem 2 , and the inner peripheral portion of the sealing sleeve 51 and the outer peripheral portion of the valve stem 2 are mutually sealed. The sealing sleeve 51 is located above the shaft sleeve 22 . The top of the valve stem 2 is also threadedly connected with a fixing sleeve 25 , and the sealing sleeve 51 is pressed between the shaft sleeve 22 and the fixing sleeve 25 .

The upper part of the guide sleeve 23 has a guide sleeve partition part 231. The guide sleeve partition part 231 is in the shape of a bell mouth which is gradually opened from the bottom to the top and is gradually opened from the guide sleeve 23 to the inner wall of the valve cavity 11. The upper end seal is embedded in the inner wall of the valve body 1, the top of the guide sleeve partition 231 is provided with an annular sealing groove 232, and the bottom of the outer end of the sealing body 52 has a ring of sealing bumps 521 protruding downward. The outer end of 52 is sealingly embedded between the guide sleeve partition 231 and the inner wall of the valve body 1, and the sealing protrusion 521 is sealingly embedded in the sealing groove 232, so that the outer end of the sealing body 52 and the outer end of the top of the guide sleeve 23 are sealed. Reliable sealing is maintained between the ends, with a stable and good sealing effect.

In this way, the aforementioned buffer space 6 is formed between the sealing body 52 and the guide sleeve partition 231 . The sealing member 5 made of flexible material realizes the state that the buffer chamber 4 and the drive chamber 3 are always kept sealed and separated during the movement of the valve stem 2; the sealing body 52 will be deformed by the gas pressure in the buffer chamber 4, and the buffer space 6 provides room for deformation of the sealing body 52 .

In this embodiment, the valve cavity 11 and the drive cavity 3 are separated in the following way: the outer periphery of the valve stem 2 is sleeved with a corrugated sleeve 26, the corrugated sleeve 26 is always located in the valve cavity 11, and the corrugated sleeve is The lower end portion of the bellows 26 is fixed on the lower part of the valve stem 2 and is mutually sealed with the outer peripheral wall of the valve stem 2 . It is sealed and arranged so that the drive chamber 3 and the valve chamber 11 are isolated from each other and not communicated with each other. The use of the corrugated sleeve 26 can effectively ensure the sealing separation between the valve cavity 11 and the driving cavity 3 during the movement of the valve stem 2 .

In the filling production of beverages, the gas in the gaseous liquid is usually carbon dioxide. The working principle and process of the filling valve of this embodiment are briefly described below by taking the filling of carbon dioxide as an example. The gas in the gas chamber 10 is carbon dioxide, and the carbon dioxide in the gas chamber 10 enters the buffer chamber 4 through the filling pipeline 91 and the gas switch valve 9 .

The first filling process (injecting carbon dioxide into the bottle 20 first, and then filling), the specific process is as follows:

The valve body 1 is in the closed valve state. After the bottle 20 to be filled is clamped and pressed against the bottom of the valve port 12 by the bottle clamping mechanism 30, the gas switch valve 9 is opened, and the carbon dioxide in the gas chamber 10 is filled in sequence. The pipeline 91, the gas switch valve 9, the buffer chamber 4, and the air return channel 21 enter the bottle 20. When the equal pressure is established, the valve stem 2 moves upward to make the valve body 1 switch to the open valve state, and the material liquid passes through the liquid inlet pipe. 13. The valve cavity 11 and the valve port 12 enter into the bottle 20 for filling. During the filling process, the gas in the bottle 20 flows back into the buffer chamber 4 from the air return channel 21 . After the liquid level in the bottle 20 reaches the liquid level required for filling, the valve stem 2 acts so that the valve body 1 is in a closed state, the gas switch valve 9 is closed, the exhaust switch valve 6 is opened, and the gas in the bottle 20 and the valve port is closed. Then, the gas is discharged into the exhaust chamber 8 through the exhaust pipe 61, and the gas in the exhaust chamber 8 is discharged to the outside, thereby completing the filling work in the bottle. The gas is discharged through the exhaust chamber 8 to prevent the external gas from entering the filling equipment and causing pollution, thereby greatly improving the cleanliness of the filling and ensuring the quality of the filling products.

The second filling process (extract the gas in the bottle 20 first, then inject carbon dioxide into the bottle, and then carry out filling), the specific process is as follows:

The valve body 1 is in the closed valve state. After the bottle 20 to be filled is clamped and pressed against the bottom of the valve port 12 by the bottle clamping mechanism 30, the negative pressure switch valve 7 is opened. Under the action of the negative pressure device, the bottle 20 The gas in the bottle enters into the negative pressure chamber 72 through the exhaust channel 14, the negative pressure switch valve 7, and the negative pressure pipeline 71 in turn, so as to empty the gas in the bottle. The purpose of this is to improve the product quality and effectively prolong the product preserve period. After that, the negative pressure switch valve 7 is closed, the gas switch valve 9 is opened, and the carbon dioxide in the gas chamber 10 enters the bottle 20 through the filling pipeline 91, the gas switch valve 9, the buffer chamber 4, and the return gas channel 21 in sequence. After the equal pressure is established, the valve stem 2 moves upward to open the valve, and the liquid enters the bottle through the liquid inlet pipe 13, the valve cavity 11 and the valve port 12, so as to carry out filling. During the filling process, the gas in the bottle 20 returns from The air passage 21 flows back into the buffer chamber 4 . After the liquid level in the bottle 20 reaches the liquid level required for filling, the valve stem 2 acts so that the valve body 1 is in a closed state, the gas switch valve 9 is closed, the exhaust switch valve 6 is opened, and the inside of the bottle 20 and the valve port 12 are closed. The gas is discharged into the exhaust chamber 8 through the exhaust pipeline 61 and then discharged to the outside, thereby completing the filling work in the bottle.

To sum up, the gas-containing liquid filling valve of the present invention has ingenious structure and good sealing effect, and can greatly improve the filling quality and product quality. At the same time, the gas-containing liquid filling valve can realize two different filling processes according to actual needs, has a wide range of applications, greatly improves the flexibility of use, and effectively reduces production costs for filling production enterprises.

Claims

A gas-containing liquid filling valve, comprising a valve body and a valve stem, the valve body is provided with a valve cavity, the bottom of the valve body is provided with a valve port, the valve port is located below the valve cavity, the valve The rod extends in the up-down direction and is arranged in the valve cavity so as to be relatively movable in the up-down direction, the valve rod has a return air passage extending through the up-down direction, the valve cavity is connected with a liquid inlet pipe, and the valve body It has a valve opening state and a valve closing state that are switched by the up and down movement of the valve stem. When the valve is in the open state, the valve cavity and the valve port communicate with each other; when the valve is in the closed state, the valve port is connected to the valve. The valve chambers are isolated from each other, and are characterized in that:

The top of the valve body is provided with a buffer cavity, the buffer cavity is located above the valve cavity on the valve body, and the buffer cavity and the valve cavity are not communicated with each other, and the upper end of the valve stem is Located in the buffer chamber, the upper port of the air return channel is communicated with the buffer chamber, and the filling valve further includes a valve body which is arranged on the valve body and connected with the buffer chamber and is used for sending to all the buffer chambers. The gas switch valve for filling gas in the cache cavity,

The filling valve also includes a negative pressure switch valve and an exhaust switch valve respectively arranged on the valve body. The gas pipeline is connected to the exhaust chamber, the valve body is also provided with an exhaust channel, and the exhaust channel has two ports that are respectively arranged at two ends of the self-length direction at different ends, and one of the ports is communicated with the valve port. And the other port is respectively connected with the negative pressure switch valve and the exhaust switch valve.
The gas-containing liquid filling valve according to claim 1, wherein the exhaust passage extends along the upper and lower directions on the valve body, and the lower port of the exhaust passage is always in communication with the valve port It is arranged that the upper port of the exhaust passage is respectively connected with the negative pressure switch valve and the exhaust switch valve.
The gas-containing liquid filling valve according to claim 1, wherein the upper part of the valve body is further provided with a driving cavity, and the buffer cavity, the driving cavity and the valve cavity are on the valve body. Distributed sequentially from top to bottom and are not connected to each other, the filling valve further includes a power mechanism for driving the valve stem to move up and down, and the power mechanism at least includes a piston fixed on the valve stem, so The piston is arranged in the driving chamber.
The gas-containing liquid filling valve according to claim 3, characterized in that: a sealing barrier is further provided between the valve stem and the valve body, and a sealing barrier is arranged between the driving chamber and the buffer chamber. The sealing and blocking structure includes a sealing member and a guide sleeve, the sealing member is made of a flexible material and is fixed on the valve stem, and the inner peripheral portion of the sealing member is connected to the valve stem. The outer peripheral portion is provided in a sealed manner, the guide sleeve is fixedly arranged in the valve body, and the upper outer peripheral portion of the guide sleeve is provided in a sealed manner with the valve body, and the outer peripheral portion of the sealing member is provided in a sealed manner. It is fixed on the upper part of the guide sleeve and sealed with the guide sleeve, and a buffer space is formed between the sealing member and the guide sleeve, and the buffer space and the buffer cavity are not communicated with each other. , the piston can move up and down on the inner wall of the driving cavity and the outer wall of the guide sleeve, respectively.
The gas-containing liquid filling valve according to claim 4, wherein the sealing member comprises an annular sealing sleeve, and a sealing body disposed outside the sealing sleeve, and the sealing sleeve is fixedly disposed in the sealing sleeve. On the valve stem, the inner peripheral part of the sealing sleeve and the outer peripheral part of the valve stem are mutually sealed, and the upper part of the guide sleeve is provided with a guide sleeve partition part, and the guide sleeve partition part is arranged from bottom to top. In the shape of a bell mouth that gradually opens outward in the radial direction, the outer peripheral portion of the sealing body is fixed and relatively sealingly disposed on the upper portion of the guide sleeve dividing portion.
The gas-containing liquid filling valve according to claim 5, wherein the top of the guide sleeve partition is fixedly embedded in the inner wall of the valve body, and the top of the guide sleeve partition is provided with an annular a sealing groove, the bottom of the outer end of the sealing body has a sealing protrusion that protrudes downward, the sealing body is embedded between the partition part of the guide sleeve and the inner wall of the valve, and the sealing protrusion is A block seal is embedded in the seal groove.
The gas-containing liquid filling valve according to claim 5, wherein the sealing body and the sealing sleeve are integrally arranged, and the sealing body forms an arc radially outward from the outer peripheral portion of the sealing sleeve. extending in a curved shape.
The gas-containing liquid filling valve according to claim 4, wherein the sealing and blocking structure further comprises a shaft sleeve fixedly sleeved on the valve stem, and the shaft sleeve is located at the edge of the sealing member. Below, the guide sleeve is slidably sleeved on the outer peripheral portion of the shaft sleeve, a retaining ring is fixedly formed on the lower part of the shaft sleeve, the retaining ring is located in the driving cavity, and the piston It is fixed above the retaining ring.
The gas-containing liquid filling valve according to claim 8, wherein a fixing sleeve is threadedly connected to the top of the valve stem, and the sealing member is axially pressed between the fixing sleeve and the shaft sleeve. between.
The gas-containing liquid filling valve according to claim 3, wherein a corrugated sleeve is sleeved on the outer periphery of the valve stem, the corrugated sleeve is always located in the valve cavity, and the corrugated sleeve is sleeved. The lower end of the pipe is fixed on the lower part of the valve stem and is mutually sealed with the outer peripheral wall of the valve stem, the upper end of the corrugated sleeve is formed with a sealing ring, and the sealing ring is connected to the valve The inner peripheral wall of the body is sealingly arranged, so that the drive cavity and the valve cavity are isolated from each other and not communicated with each other.
The gas-containing liquid filling valve according to claim 3, wherein the valve stem has an initial position and a valve closing position on the movement path along the up-down direction, and when the valve stem is in the initial position, The valve body is in the valve opening state; when the valve stem is in the valve closing position, the valve body is in the valve closing state, and when the valve stem is converted from the initial position to the valve closing position , the valve rod moves downward synchronously with the piston under the action of the power mechanism.
The gas-containing liquid filling valve according to claim 11, wherein the power mechanism further comprises an elastic member for providing the force required for the upward movement of the piston, the piston is arranged in the driving cavity and will The drive cavity is divided into an upper drive cavity and a lower drive cavity that are not connected to each other, the elastic member is arranged in the lower drive cavity, and the valve body is also provided with a connection for connecting the upper drive cavity and the compressed gas source gas line.
The gas-containing liquid filling valve according to claim 12, wherein the elastic member is a spring, a spring seat is arranged in the lower driving chamber, and the upper and lower ends of the spring act on the piston's upper and lower ends respectively. On the bottom and the spring seat, the spring always has a tendency to drive the piston upwards.
The gas-containing liquid filling valve according to claim 13, wherein a retaining ring is fixed on the bottom of the piston, a shaft sleeve is fixed on the valve stem, and the retaining ring is connected to the shaft sleeve. They are fixed to each other, and the upper end of the spring is pressed against the bottom of the retaining ring.
The gas-containing liquid filling valve according to claim 12, wherein the gas pipeline is communicated with the compressed gas source through a solenoid valve, and when the valve body is switched from the open state to the closed state During the valve state process, compressed air enters the upper drive chamber through the solenoid valve and the gas pipeline in turn, so that the piston drives the valve stem to move downward under the action of the pressure difference and from the initial position. Reach the valve closing position; when the valve body is converted from the valve closing state to the valve opening state, the compressed air in the upper driving chamber passes through the gas pipeline and the solenoid valve in sequence. The valve is discharged to the outside, so that the force of the piston on the elastic member drives the valve rod to move downward and reaches the initial position from the valve-closing position.
The gas-containing liquid filling valve according to claim 12, wherein a limit stop ring is arranged in the upper driving cavity, and when the valve rod moves upward to the initial position, the piston pushes upward against on the retaining ring.
A gas-containing liquid filling valve comprises: a valve body, a valve cavity is arranged in the valve body, a valve port is provided at the bottom of the valve body, a valve stem is arranged in the valve cavity, and the valve stem can move up and down to drive the valve body to be in the position between the valve port and the valve port. The valve opening state in which the valve cavity is connected or the valve closing state in which the valve port is separated from the valve cavity, the inside of the valve stem is axially penetrated to form a return air channel, and the valve cavity is connected with a liquid inlet pipe, which is characterized in that: the valve body at the top of the valve cavity A drive cavity and a buffer cavity are arranged in sequence from bottom to top. The valve cavity, the drive cavity and the buffer cavity are sealed and separated from each other in turn. The upper end of the valve stem extends into the buffer cavity, and the upper port of the return air passage is communicated with the buffer cavity. An exhaust channel is provided, the lower port of the exhaust channel is communicated with the valve port, the upper end of the exhaust channel is respectively connected with the negative pressure switch valve and the exhaust switch valve arranged on the valve body, and the negative pressure switch valve passes through the negative pressure pipe. The road is communicated with the negative pressure chamber, the exhaust switch valve is communicated with the exhaust chamber through the exhaust pipeline, the valve body outside the buffer chamber is provided with a gas switch valve, and the gas switch valve is communicated with the gas chamber through the filling pipeline.
A gas-containing liquid filling valve according to claim 17, wherein the upward and downward movement of the valve stem is driven by a power mechanism, and the power mechanism comprises: a piston arranged in the driving chamber, and the piston moves the driving chamber It is divided into an upper driving chamber and a lower driving chamber which are sealed and isolated from each other. The piston is connected with the valve stem. The lower driving chamber is provided with a spring and a spring seat. The spring seat is fixed at the bottom of the lower driving chamber. The upper and lower ends of the spring act on the piston respectively. The bottom of the valve and the spring seat; the spring always has the tendency to drive the piston to drive the valve stem upward to the initial position. When the valve stem is at the initial position, the valve body is in the open valve state; the upper driving chamber is connected with the gas pipeline, and the gas pipeline passes through The solenoid valve is connected to the compressed air source; the compressed air can enter the upper drive chamber through the solenoid valve and the gas pipeline in turn, so that the piston drives the valve stem to move downward under the action of the pressure difference and compress the spring until the valve stem moves to a The valve body is in the closed state; the compressed air in the upper drive chamber can be discharged through the solenoid valve, so that the piston is acted by the elastic force of the spring to drive the valve stem to return to the initial position.
A gas-containing liquid filling valve according to claim 18, wherein a limit stop ring is arranged in the upper drive chamber, and the piston is blocked by the limit stop ring when the piston drives the valve rod to move upward to the initial position. The valve body is in the open state.
A gas-containing liquid filling valve according to claim 18 or 19, wherein a shaft sleeve is fixedly arranged on the upper end of the valve stem, a guide sleeve is fixedly arranged outside the shaft sleeve, and a retaining ring is fixedly arranged at the bottom of the piston , the retaining ring is fixed with the shaft sleeve, the upper end of the spring acts on the bottom of the retaining ring, the inner and outer sides of the piston are sealed with the inner wall of the drive cavity and the outer wall of the guide sleeve respectively, and the piston can be between the inner wall of the drive cavity and the outer wall of the guide sleeve. The outer wall of the guide sleeve moves up and down.
A gas-containing liquid filling valve according to claim 20, characterized in that: the sealing partition structure between the buffer cavity and the driving cavity comprises: a sealing member made of a flexible material between the buffer cavity and the driving cavity is sealed and separated , the structure of the sealing part includes: an annular sealing sleeve, a sealing body is arranged outside the sealing sleeve, the sealing sleeve is installed on the valve stem above the shaft sleeve, the valve stem on the top of the sealing sleeve is provided with a fixing sleeve, the fixing sleeve is It is threadedly fixed with the valve stem, the fixing sleeve seals the sealing sleeve against the top of the shaft sleeve, and the outer end of the sealing body is sealed and fixed with the inner wall of the valve body; The upper end of the sealing sleeve is sealed and embedded on the inner wall of the valve body, and a buffer space is formed between the sealing body and the dividing part of the guiding sleeve.
A gas-containing liquid filling valve according to claim 21, wherein the top of the guide sleeve partition embedded in the inner wall of the valve is provided with a sealing groove, and the bottom of the outer end of the sealing body is provided with a sealing bump The sealing body is sealingly embedded between the partition part of the guide sleeve and the inner wall of the valve body, and the sealing protrusion is sealingly embedded in the sealing groove.
A gas-containing liquid filling valve according to claim 17 or 18 or 19, wherein the valve stem in the valve cavity is sleeved with a corrugated sleeve, the upper end of the corrugated sleeve forms a sealing ring, and the sealing ring seals It is clamped on the inner wall of the valve body, and the lower end of the corrugated sleeve is sealedly connected with the outer wall of the lower end of the valve stem.
A gas-containing liquid filling valve according to claim 17 or 18 or 19, characterized in that: the lower end of the valve stem is gradually tapered from thick to thin, when the valve body is in the closed valve state, and when the bottle mouth pressure stops at When the valve port is at the bottom, the lower port of the return gas pipeline is located in the bottle mouth position inside the bottle mouth.