CN112479126A - Filling valve, working method of filling valve and filling machine - Google Patents

Abstract

The invention discloses a filling valve, a working method of the filling valve and a filling machine. The first valve rod, the second valve rod and the piston of the filling valve cooperate to enable materials to enter the valve cavity orderly and then to be discharged from the valve cavity, and the second valve rod can seal the valve cavity, so that material waste caused by leakage of the materials from the valve cavity is avoided, and a machine table is prevented from being polluted. By controlling the first valve rod and the second valve rod, the valve cavity can be in a communicated state, and the valve cavity can be conveniently flushed by cleaning liquid.

Description

Filling valve, working method of filling valve and filling machine

Technical Field

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

Background

In the filling industry, a plunger type filling valve is generally adopted for filling when large-particle liquid or viscous materials are filled. The plunger filling valve is a quantitative filling valve, generally comprising a rotary valve, a piston and a quantitative cylinder. The working principle is as follows: the rotary valve core rotates to close the discharge hole and open the feed hole, the piston acts to suck the material into the quantitative cylinder, then the rotary valve core rotates to close the feed hole again and open the discharge hole, and the piston acts to discharge the material from the discharge hole and fill the material into the bottle. When this kind of filling valve is installed on the rotation type liquid filling machine, the rotation of rotary valve case is generally executed by swing arm cam mechanism, and the rotary valve case rotates once when the filling valve passes through specific position, and when filling valve below does not have the bottle, swing arm cam mechanism also can drive rotary valve case and rotate, opens the discharge gate, and some materials can flow from the valve opening this moment, and on the drippage board, cause the material extravagant, also increased the cleaning work volume of board. In addition, when on-line cleaning is carried out, the interior of the filling valve is difficult to clean, because the feed inlet and the discharge outlet of the rotary valve cannot be opened simultaneously, cleaning liquid cannot continuously flow in the valve, and the flow speed required by cleaning is difficult to achieve by the cleaning liquid.

Disclosure of Invention

The invention aims to provide a filling valve, a working method of the filling valve and a filling machine, which can reduce material waste and are convenient to clean.

In order to achieve the purpose, the invention adopts the following technical scheme:

in one aspect, a filling valve is provided, including valve body, first valve rod, second valve rod and piston, the inside cavity of valve body forms the valve chamber, the valve chamber is in the valve body surface forms feed inlet and discharge gate, first valve rod the second valve rod with the equal activity of piston sets up inside the valve body, first valve rod is close to feed inlet and alternative shutoff the valve chamber, the second valve rod is close to discharge gate and alternative shutoff the valve chamber, the second valve rod can stretch out the discharge gate, the piston sets up first valve rod with between the second valve rod, the piston inhales the material and discharges the valve chamber.

As a preferable scheme of the present invention, the filling valve further includes a first cylinder, a second cylinder, and a third cylinder, the first cylinder is connected to the first valve rod, the second cylinder is connected to the second valve rod, and the third cylinder is connected to the piston.

As a preferable scheme of the present invention, the filling valve further includes a pressure relief mechanism, the third cylinder is a dual-output cylinder, one end of a cylinder shaft of the third cylinder is connected to the piston, the other end of the cylinder shaft is selectively abutted to the pressure relief mechanism, and the pressure relief mechanism enables the piston to continue to move for a set distance after sucking the material so as to expand the volume of the valve cavity.

In a preferred embodiment of the present invention, the pressure relief mechanism includes a fourth cylinder, and a cylinder shaft of the fourth cylinder selectively abuts against a cylinder shaft of the third cylinder.

In a preferred embodiment of the present invention, a cushion pad is disposed on a cylinder shaft of the fourth cylinder or the third cylinder.

As a preferable aspect of the present invention, the pressure relief mechanism further includes an adjusting member, the fourth cylinder is fixed to the adjusting member, and the adjusting member is configured to adjust a distance between the fourth cylinder and the third cylinder.

As a preferable scheme of the present invention, a first sealing element is sleeved on the first valve rod, the first sealing element can be abutted against an inner wall of the valve body to achieve sealing, a second sealing element is arranged inside the valve body, the second sealing element is arranged near the discharge port, and the second valve rod can penetrate through the second sealing element, so that the second sealing element is sleeved on the second valve rod.

In another aspect, a method of operating a filling valve is provided, comprising the steps of:

s1, enabling a second valve rod to be in a state of plugging a valve cavity, and enabling a first valve rod to be in a state of not plugging the valve cavity;

s2, enabling the piston to move, increasing the volume of the valve cavity, and sucking materials into the valve cavity;

s3, enabling the first valve rod to be in a state of plugging the valve cavity, and enabling the second valve rod to be in a state of not plugging the valve cavity;

s4, enabling the piston to move reversely, reducing the volume of the valve cavity, and pushing the material out of the valve cavity;

and S5, extending the second valve rod out of the discharge port, and pushing out the residual materials at the discharge port.

As a preferable scheme of the present invention, the step S2 specifically includes the following steps:

s21, enabling a third cylinder to drive the piston to move, increasing the volume of a valve cavity, and sucking materials into the valve cavity;

s22, a cylinder shaft of the third cylinder is abutted against a pressure relief mechanism, and the cylinder shaft of the third cylinder and the piston temporarily stop moving;

and S23, enabling the pressure relief mechanism to act, enabling a cylinder shaft of the third cylinder and the piston to continue to move for a set distance, further increasing the volume of the valve cavity, and reducing the pressure of the material in the valve cavity.

In addition, still provide a liquid filling machine, include the filling valve of any above-mentioned technical scheme.

The invention has the beneficial effects that:

according to the filling valve, the first valve rod, the second valve rod and the piston which are arranged in the valve cavity move independently, materials enter the valve cavity orderly and then are discharged from the valve cavity through the cooperative work of the first valve rod, the second valve rod and the piston, the valve cavity can be sealed by the second valve rod, the materials are prevented from leaking from the valve cavity to cause material waste, and a machine table of the filling machine is prevented from being polluted. Through controlling the first valve rod and the second valve rod, the valve cavity can be in a communicated state, the valve cavity is convenient to be washed by the cleaning liquid, and therefore the filling valve is high in cleaning efficiency and good in cleaning effect. Because the second valve rod can stretch out of the discharge hole, after the piston discharges materials, the second valve rod can discharge the materials possibly remaining at the discharge hole out of the valve cavity and fill the materials into the bottle, so that the materials are further saved, and the phenomenon that the remaining materials fall to pollute a machine table is also prevented.

Drawings

FIG. 1 is a schematic cross-sectional view of a filling valve according to an embodiment of the present invention;

FIG. 2 is a flow chart of a method of operating a filling valve according to an embodiment of the present invention;

fig. 3 is a flow chart of a method of operating a filling valve according to another embodiment of the present invention.

In the figure:

1. a valve body; 11. a first seal member; 12. a second seal member; 100. a valve cavity; 110. a feed inlet; 120. a discharge port; 2. a first valve stem; 3. a second valve stem; 4. a piston; 5. a first cylinder; 6. a second cylinder; 7. a third cylinder; 8. a pressure relief mechanism; 81. a fourth cylinder; 82. an adjustment member; 9. a cushion pad.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the word "over" a first feature or feature in a second feature may include the word "over" or "over" the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under" a second feature may include a first feature that is directly under and obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

As shown in fig. 1, the filling valve of this embodiment includes a valve body 1, a first valve rod 2, a second valve rod 3 and a piston 4, a valve cavity 100 is formed in the valve body 1, a feed inlet 110 and a discharge outlet 120 are formed on the surface of the valve body 1 in the valve cavity 100, the first valve rod 2, the second valve rod 3 and the piston 4 are movably disposed in the valve body 1, the first valve rod 2 is close to the feed inlet 110 and selectively blocks the valve cavity 100, the second valve rod 3 is close to the discharge outlet 120 and selectively blocks the valve cavity 100, the second valve rod 3 can extend out of the discharge outlet 120, the piston 4 is disposed between the first valve rod 2 and the second valve rod 3, and the piston 4 sucks and discharges materials into the valve cavity.

The first valve rod 2, the second valve rod 3 and the piston 4 which are arranged in the valve cavity 100 of the filling valve in the embodiment move independently, materials orderly enter the valve cavity 100 and then are discharged from the valve cavity 100 through cooperative work of the first valve rod 2, the second valve rod 3 and the piston, the materials can be prevented from leaking from the valve cavity 100 to cause material waste, and a machine table of the filling machine is prevented from being polluted. By controlling the first valve rod 2 and the second valve rod 3, the valve cavity 100 can be in a communicated state, so that the valve cavity 100 can be conveniently washed by the cleaning liquid, and the filling valve is high in cleaning efficiency and good in cleaning effect. Because the second valve rod 3 can extend out of the discharge port 120, after the piston 4 discharges the material, the second valve rod 3 can discharge the material possibly remaining at the discharge port 120 out of the valve cavity 100 and fill the material into the bottle, especially when the material is sticky or contains particles, the material is easy to remain, thereby further saving the material and preventing the remaining material from falling to pollute the machine.

Further, the filling valve further comprises a first cylinder 5, a second cylinder 6 and a third cylinder 7, the first cylinder 5 is connected with the first valve rod 2, the second cylinder 6 is connected with the second valve rod 3, and the third cylinder 7 is connected with the piston 4, so that the first valve rod 2, the second valve rod 3 and the piston 4 are respectively driven to do reciprocating linear motion in the valve body 1, the motions of the first valve rod 2, the second valve rod 3 and the piston 4 are independently controlled, and respective strokes can also be adjusted in a targeted manner according to actual needs, so that actual production needs are met.

Furthermore, the filling valve further comprises a pressure relief mechanism 8, the third cylinder 7 is a double-shaft cylinder, one end of a cylinder shaft of the third cylinder 7 is connected with the piston 4, the other end of the cylinder shaft of the third cylinder 7 is selectively abutted against the pressure relief mechanism 8, and the pressure relief mechanism 8 enables the piston 4 to continue to move for a set distance after sucking materials so as to expand the volume of the valve cavity 100. During the actual filling operation, after the piston 4 sucks the material into the valve cavity 100, the first valve rod 2 needs to be lowered to block the valve cavity 100, so that the piston 4 can press the material out of the discharge hole 120. After the first valve rod 2 blocks the valve cavity 100, the material is pressed to be subjected to a larger pressure in the valve cavity 100. When the second valve rod 3 is lifted, the piston 4 is not pressed to eject the material, and the material may be directly ejected from the discharge port 120 without control due to its own pressure, so that the filling operation cannot be performed smoothly. By arranging the pressure relief mechanism 8, the piston 4 can continue to move for a set distance after sucking materials so as to enlarge the volume of the valve cavity 100, so that the pressure on the materials in the valve cavity 100 is reduced, the materials can flow out of the discharge hole 120 only under the extrusion of the piston 4, and the filling operation can be carried out controllably and smoothly.

Specifically, the pressure relief mechanism 8 includes a fourth cylinder 81, and a cylinder shaft of the fourth cylinder 81 selectively abuts against a cylinder shaft of the third cylinder 7. When the cylinder shaft of the third cylinder 7 contacts the cylinder shaft of the fourth cylinder 81, the cylinder shaft of the third cylinder 7 stops moving temporarily, so that the piston 4 connected with the third cylinder stops moving temporarily, and at the moment, the material is sucked completely, and then the first valve rod 2 seals the valve cavity 100. After the valve cavity 100 is blocked by the first valve rod 2, the cylinder shaft of the fourth cylinder 81 is contracted, so that the cylinder shaft of the third cylinder 7 can continue to move for a certain distance, and the piston 4 also continues to move for a certain distance, so that the volume of the valve cavity 100 is increased, and the pressure on the material is released.

In this embodiment, the cushion pad 9 is disposed on the cylinder shaft of the fourth cylinder 81, and the cushion pad 9 can prevent the cylinder shaft of the fourth cylinder 81 from rigidly colliding with the cylinder shaft of the third cylinder 7, so as to reduce the impact force and protect the stability of the filling valve structure. Of course, the cushion pad 9 may also be provided on the cylinder axis of the third cylinder 7.

Further, the pressure relief mechanism 8 further comprises an adjusting part 82, the fourth cylinder 81 is fixed on the adjusting part 82, and the adjusting part 82 is used for adjusting the distance between the fourth cylinder 81 and the third cylinder 7, so that the stroke of the piston 4 is adjusted, and the adjustment of the material suction amount is realized.

Preferably, the first sealing element 11 is sleeved on the first valve rod 2, the first sealing element 11 can be abutted against the inner wall of the valve body 1 to realize sealing, the second sealing element 12 is arranged inside the valve body 1, the second sealing element 12 is arranged close to the discharge hole 120, and the second valve rod 3 can pass through the second sealing element 12, so that the second sealing element 12 is sleeved on the second valve rod 3. The valve cavity 100 can achieve better sealing performance by virtue of the first sealing element 11 and the second sealing element 12, so that materials can be effectively prevented from leaking from the valve cavity 100, and the volume of the filled materials is ensured to be maintained within a required range.

As shown in fig. 2, an embodiment of the present invention further provides a method for operating a filling valve, including the following steps:

s1, enabling a second valve rod 3 to be in a state of plugging a valve cavity 100, and enabling a first valve rod 2 to be in a state of not plugging the valve cavity 100;

s2, the piston 4 is moved, the volume of the valve cavity 100 is increased, and materials are sucked into the valve cavity 100;

s3, enabling the first valve rod 2 to be in a state of plugging the valve cavity 100, and enabling the second valve rod 3 to be in a state of not plugging the valve cavity 100;

s4, the piston 4 moves reversely, the size of the valve cavity 100 is reduced, and materials are pushed out of the valve cavity 100;

s5, extending the second valve rod 3 out of the discharge hole 120, and pushing out the residual materials at the discharge hole 120.

The filling valve of the embodiment has simple and reliable working method and can reduce the waste of materials.

As shown in fig. 3, further, in some embodiments, the step S2 specifically includes the following steps:

s21, enabling the third cylinder 7 to drive the piston 4 to move, increasing the volume of the valve cavity 100, and sucking materials into the valve cavity 100;

s22, a cylinder shaft of the third cylinder 7 is abutted against the pressure relief mechanism 8, and the cylinder shaft of the third cylinder 7 and the piston 4 stop moving temporarily;

and S23, the pressure relief mechanism 8 is actuated, the cylinder shaft of the third cylinder 7 and the piston 4 continue to move for a set distance, the volume of the valve cavity 100 is further increased, and the pressure on the materials in the valve cavity 100 is reduced.

The working method of the filling valve of the above embodiment can prevent the material from being uncontrollably ejected from the discharge port 120 due to over-high pressure, and avoid the waste of the material and the pollution to the machine of the filling machine.

Embodiments of the present invention also provide a filling machine including the filling valve of any of the above embodiments, thereby reducing material waste and facilitating cleaning.

Reference throughout this specification to the description of the term "preferred" or the like means that a particular feature, structure, material, or characteristic described in connection with the example or illustration is included in at least one example or illustration of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above examples are only intended to illustrate the details of the invention, which is not limited to the above details, i.e. it is not intended that the invention must be implemented in such detail. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.

Claims (10)

1. The utility model provides a filling valve, its characterized in that includes valve body, first valve rod, second valve rod and piston, the inside cavity of valve body forms the valve chamber, the valve chamber is in the valve body surface forms feed inlet and discharge gate, first valve rod the second valve rod with the equal activity of piston sets up inside the valve body, first valve rod is close to feed inlet and alternative shutoff the valve chamber, the second valve rod is close to discharge gate and alternative shutoff the valve chamber, the second valve rod can stretch out the discharge gate, the piston sets up first valve rod with between the second valve rod, the piston inhales the material and discharges the valve chamber.

2. The filling valve of claim 1, further comprising a first cylinder connected to the first valve stem, a second cylinder connected to the second valve stem, and a third cylinder connected to the piston.

3. The filling valve of claim 2, further comprising a pressure relief mechanism, wherein the third cylinder is a dual-out-shaft cylinder, one end of a cylinder shaft of the third cylinder is connected to the piston, and the other end of the cylinder shaft is selectively abutted against the pressure relief mechanism, and the pressure relief mechanism enables the piston to continue to move for a set distance after sucking in the material so as to expand the volume of the valve cavity.

4. The filling valve of claim 3, wherein the pressure relief mechanism comprises a fourth cylinder having a cylinder axis that selectively abuts a cylinder axis of the third cylinder.

5. The filling valve according to claim 4, wherein a cushion is provided on the cylinder shaft of the fourth cylinder or the third cylinder.

6. The filling valve of claim 4, wherein the pressure relief mechanism further comprises an adjustment member to which the fourth cylinder is secured, the adjustment member being for adjusting a spacing between the fourth cylinder and the third cylinder.

7. The filling valve according to claim 1, wherein the first stem is sleeved with a first sealing member, the first sealing member can abut against an inner wall of the valve body to achieve sealing, a second sealing member is arranged inside the valve body, the second sealing member is arranged close to the discharge port, and the second stem can penetrate through the second sealing member, so that the second sealing member is sleeved on the second stem.

8. A method of operating a filling valve according to any of claims 1 to 7, comprising the steps of:

s1, enabling a second valve rod to be in a state of plugging a valve cavity, and enabling a first valve rod to be in a state of not plugging the valve cavity;

s2, enabling the piston to move, increasing the volume of the valve cavity, and sucking materials into the valve cavity;

s3, enabling the first valve rod to be in a state of plugging the valve cavity, and enabling the second valve rod to be in a state of not plugging the valve cavity;

s4, enabling the piston to move reversely, reducing the volume of the valve cavity, and pushing the material out of the valve cavity;

and S5, extending the second valve rod out of the discharge port, and pushing out the residual materials at the discharge port.

9. The operating method of the filling valve according to claim 8, wherein the step S2 specifically includes the steps of:

s21, enabling a third cylinder to drive the piston to move, increasing the volume of a valve cavity, and sucking materials into the valve cavity;

s22, a cylinder shaft of the third cylinder is abutted against a pressure relief mechanism, and the cylinder shaft of the third cylinder and the piston temporarily stop moving;

and S23, enabling the pressure relief mechanism to act, enabling a cylinder shaft of the third cylinder and the piston to continue to move for a set distance, further increasing the volume of the valve cavity, and reducing the pressure of the material in the valve cavity.

10. A filling machine, characterized in that it comprises a filling valve according to any one of claims 1 to 7.

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