Filling valve and filling method

Abstract

A filling valve and a filling method are provided. The filling valve is used to fill a container with a raw material containing particles, and includes: a valve cavity; a valve stem disposed in the valve cavity and having a sealing disc; a flow guide portion connected with the valve cavity and including a flow guide passage, wherein the valve stem is movable in a first direction, the valve cavity is not communicated with the flow guide passage when the valve stem is moved in the first direction such that the sealing disc contacts the flow guide portion, and the valve cavity is communicated with the flow guide passage when the valve stem is moved in the first direction such that the sealing disc does not contact the flow guide portion; the valve cavity includes a valve cavity main portion and a valve cavity contraction portion, the valve cavity contraction portion is located between the valve cavity main portion and the flow guide portion in the first direction; and in a direction perpendicular to the first direction, the size of the valve cavity contraction portion is smaller than the size of the valve cavity main portion and greater than or equal to the size of the sealing disc.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a filling valve and a filling method. BACKGROUND

[0002] At present, the trade exchanges between countries and regions are very frequent, and in order to facilitate storage, transportation and sales, various products often need to be packaged. For example, food such as milk, beverage, vegetable puree, etc. needs to be packaged and sealed in various containers such as packaging boxes, packaging bags, etc. in different forms. During the packaging process of the products, a filling machine is often used, which is responsible for delivering the products into the containers. The filling valve is the core device of the filling machine, and the design of the filling valve needs to be refined to ensure the filling accuracy of each filling. SUMMARY

[0003] According to an embodiment of the present disclosure, a filling valve for filling a raw material containing particles into a container is provided, and the filling valve comprises: a valve cavity; a valve rod arranged in the valve cavity and having a sealing disc; a flow guide part connected with the valve cavity and comprising a flow guide passage, wherein the valve rod is movable in a first direction, the valve cavity is not communicated with the flow guide passage when the valve rod is moved in the first direction so that the sealing disc contacts the flow guide part, and the valve cavity is communicated with the flow guide passage when the valve rod is moved in the first direction so that the sealing disc does not contact the flow guide part; the valve cavity comprises a valve cavity main part and a valve cavity contraction part, the valve cavity contraction part is located between the valve cavity main part and the flow guide part in the first direction; and in a direction perpendicular to the first direction, the size of the valve cavity contraction part is smaller than the size of the valve cavity main part and greater than or equal to the size of the sealing disc.

[0004] For example, the edge of one end of the sealing disc close to the flow guide part is referred to as a first edge, and the edge of one end of the valve cavity contraction part away from the flow guide part is referred to as a second edge; during the movement of the first edge from a position on the side away from the flow guide part of the second edge to a position flush with the second edge in the first direction, as the distance between the sealing disc and the flow guide part decreases, the length of the shortest line between the first edge and the second edge becomes shorter, and the distance between the sealing disc and the flow guide part remains greater than the length of the shortest line between the first edge and the second edge.

[0005] For example, in the direction perpendicular to the first direction, the sealing disc has a first size, the valve cavity contraction part has a second size, and (second size-first size) / 2 is not greater than the maximum size of the particles contained in the raw material.

[0006] For example, in the first direction, the size of the valve cavity contraction portion is not less than half of the maximum size of the particles contained in the raw material.

[0007] For example, in the first direction, the valve cavity contraction portion is directly connected with the flow guide portion.

[0008] For example, in the first direction, the valve cavity contraction portion is directly connected with the valve cavity main portion; or the valve cavity further comprises a valve cavity transition portion connected between the valve cavity contraction portion and the valve cavity main portion in the first direction, the size of the valve cavity transition portion gradually changes from the size of the valve cavity main portion to the size of the valve cavity contraction portion in the direction perpendicular to the first direction.

[0009] For example, in the plane perpendicular to the first direction, the cross-sectional shape of the flow guide passage is circular; or in the plane perpendicular to the first direction, the cross-sectional shape of the flow guide passage is polygonal, and the number of sides of the polygon is greater than or equal to 5.

[0010] For example, the cross-sectional shape of the flow guide passage is polygonal, and the number of sides of the polygon is 6.

[0011] For example, in the plane perpendicular to the first direction, the maximum size of the flow guide passage is 6-9 mm.

[0012] For example, in the first direction, the size of the flow guide passage is not less than 30 mm.

[0013] For example, in the first direction, the central part of the end face of the flow guide portion away from the valve cavity contraction portion is a spherical surface recessed toward the valve cavity contraction portion, the spherical surface and the end face are concentrically arranged, and the orthographic projection of the flow guide passage on the end face is located in the area where the spherical surface is located.

[0014] For example, the end face further comprises an inclined surface arranged around the spherical surface, the inclined surface is inclined to extend toward the valve cavity contraction portion away from the spherical surface in the end face.

[0015] For example, the end face further comprises a flange arranged along the edge of the spherical surface to surround the spherical surface.

[0016] For example, the flange comprises a plurality of grooves; in the first direction, each of the plurality of grooves is recessed from the end face of the flange away from the valve cavity contraction portion toward the valve cavity contraction portion.

[0017] For example, the flow guide portion comprises a plurality of flow guide passages; the orthographic projections of the plurality of flow guide passages on the end face are all located in the area where the spherical surface is located.

[0018] For example, the flow guide portion includes a plurality of flow guide channels; an end surface of the flow guide portion away from the valve cavity contraction portion is provided with a plurality of flanges, one flange is arranged around one flow guide channel; the end surface further includes an inclined surface arranged around the plurality of flanges, the inclined surface is inclined to extend towards the valve cavity contraction portion away from the plurality of flanges in the end surface.

[0019] According to the embodiments of the present disclosure, a filling method is also provided, which includes filling raw material containing particles into a container by using the filling valve as described above.

[0020] For example, the filling method according to the embodiments of the present disclosure further includes controlling the mass percentage of the particles in the raw material to be no more than 10%.

[0021] For example, in the first direction, a central part of the end surface of the flow guide portion away from the valve cavity contraction portion is a spherical surface recessed towards the valve cavity contraction portion, the spherical surface and the end surface are concentrically arranged, and the orthogonal projection of the flow guide channel on the end surface is located in the region where the spherical surface is located; the end surface further includes a flange arranged along the edge of the spherical surface to surround the spherical surface; and the filling method according to the embodiments of the present disclosure further includes controlling the viscosity of the raw material to be no greater than 500 cP.

[0022] For example, in the first direction, a central part of the end surface of the flow guide portion away from the valve cavity contraction portion is a spherical surface recessed towards the valve cavity contraction portion, the spherical surface and the end surface are concentrically arranged, and the orthogonal projection of the flow guide channel on the end surface is located in the region where the spherical surface is located; the end surface further includes an inclined surface arranged around the spherical surface, the inclined surface is inclined to extend towards the valve cavity contraction portion away from the spherical surface in the end surface; the end surface further includes a flange arranged between the spherical surface and the inclined surface, the flange surrounds the spherical surface; and the filling method according to the embodiments of the present disclosure further includes controlling the viscosity of the raw material to be no greater than 500 cP. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced as follows. Obviously, the drawings described below only relate to some embodiments of the present disclosure, but not limit the present disclosure.

[0024] Figure 1 (a), (b) and (c) of FIG. 1 respectively show residual liquid in the flow guide channel;

[0025] Figure 2 FIG. 2 is a structural schematic diagram of a filling valve according to the embodiments of the present disclosure;

[0026] Figure 3 is Figure 2a partial enlarged structure schematic view of the filling valve of

[0027] Figure 4A 、 Figure 4B 、 Figure 4C and Figure 4D is a simplified schematic view showing the movement process of the sealing disc towards the flow guide part in the filling valve according to the embodiment of the present disclosure;

[0028] Figure 5 is a partial simplified schematic view of the filling valve according to the embodiment of the present disclosure;

[0029] Figure 6A shows residual liquid in the flow guide channel;

[0030] Figure 6B is a structural schematic view of the flow guide part in the filling valve according to the embodiment of the present disclosure;

[0031] Figure 7A is a cross-sectional schematic view of the flow guide part taken along the first direction Figure 1 ;

[0032] Figure 7B is a cross-sectional schematic view of the flow guide part taken along the first direction Figure 2 ;

[0033] Figure 8A is a schematic view of the end face of the flow guide part in the filling valve according to the embodiment of the present disclosure;

[0034] Figure 8B is Figure 8A a side view of the flow guide part. DETAILED DESCRIPTION

[0035] In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without any creative effort belong to the scope of protection of the present disclosure.

[0036] Unless otherwise defined, technical terms or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first", "second", and similar terms do not imply any order, quantity, or importance, but are used to identify different components. The terms "include", "comprise", and similar terms are intended to mean that the elements or objects listed after the terms are included or encompassed by the term, and are not intended to exclude other elements or objects. The terms "inner", "outer", "upper", "lower", and similar terms are used to describe relative positions, and when the absolute positions of the described objects are changed, the relative positions can also be changed accordingly.

[0037] The drawings in the present disclosure are not strictly drawn to scale, and the specific sizes and quantities of the various structures can be determined according to actual needs. The drawings described in the present disclosure are only structural schematic diagrams.

[0038] Figure 1 Figures (a), (b), and (c) of the present disclosure respectively show residual liquid in the flow guide channel. The filling valve includes a valve cavity and a flow guide connected to the valve cavity, the flow guide including a flow guide channel, liquid raw material contained in the valve cavity being filled into a container through the flow guide channel of the flow guide. As shown in Figure 1 When the filling valve is closed after the completion of filling, the liquid raw material in the flow guide channel cannot be emptied, but is filled in the flow guide channel under the action of tension; at the next filling, the residual liquid raw material filled in the flow guide channel will be filled into the container together with the liquid raw material contained in the valve cavity. Therefore, the residual liquid raw material filled in the flow guide channel needs to be controlled, and the consistency of the residual liquid raw material filled in the flow guide channel at the end of each filling needs to be controlled, so as to ensure the filling accuracy of each filling.

[0039] In some cases, the liquid raw material contains particles according to customer requirements. If the particle size is small, it will hardly have any impact on the filling accuracy. If the particle size is large, it may destroy the liquid surface of the residual liquid raw material in the flow guide channel at the end of filling (as shown in Figure 1 (b) of the present disclosure) or may block the flow guide channel (as shown in Figure 1 (c) of the present disclosure), thereby making the controllability of the residual liquid raw material filled in the flow guide channel worse, destroying the consistency of the residual liquid raw material filled in the flow guide channel at the end of filling, and leading to poor filling accuracy. It should be noted that Figure 1 (b) and (c) of the present disclosure exaggerate the particles to be out of the boundary of the flow guide channel in order to show that the particles are large-size particles, but in fact even large-size particles are limited within the boundary of the flow guide channel.

[0040] According to an embodiment of the present disclosure, a filling valve is provided. Figure 2 is a structural schematic diagram of a filling valve according to an embodiment of the present disclosure, Figure 3 is Figure 2 is a partial enlarged structural schematic diagram of the filling valve of Figure 2 and Figure 3 The filling valve according to an embodiment of the present disclosure is used to fill raw material containing particles into a container, and comprises: a valve cavity 100; a valve rod 200 arranged in the valve cavity 100 and having a sealing disc 210; a flow guide part 300 connected with the valve cavity 100 and comprising a flow guide passage 310, wherein the valve rod 200 is movable along a first direction D, the valve cavity 100 is not communicated with the flow guide passage 310 when the valve rod 200 is moved along the first direction D so that the sealing disc 210 contacts the flow guide part 300, and the valve cavity 100 is communicated with the flow guide passage 310 when the valve rod 200 is moved along the first direction D so that the sealing disc 210 does not contact the flow guide part 300; the valve cavity 100 comprises a valve cavity main part 110 and a valve cavity contraction part 120, the valve cavity contraction part 120 is located between the valve cavity main part 110 and the flow guide part 300 in the first direction D; and in a direction perpendicular to the first direction D, the size of the valve cavity contraction part 120 is smaller than the size of the valve cavity main part 110 and is equal to or greater than the size of the sealing disc 210.

[0041] For example, the raw material is a liquid raw material, such as milk, fruit juice, etc. For example, the particles contained in the raw material are solid particles, such as rice particles, oat particles, cassava balls, etc. For example, the particles contained in the raw material have multiple different sizes.

[0042] For example, the valve cavity 100 extends along the first direction D, and correspondingly, the valve rod 200 extends along the first direction D. For example, the valve cavity 100 and the flow guide part 300 are arranged along the first direction D and connected with each other. For example, the sealing disc 210 is arranged at an end of the valve rod 200 close to the flow guide part 300.

[0043] For example, when the valve rod 200 is moved along the first direction D so that the sealing disc 210 contacts the flow guide part 300, the valve cavity 100 is not communicated with the flow guide passage 310, at this time the filling valve is closed, and the raw material contained in the valve cavity 100 cannot enter the flow guide passage 310, so as to not enter the container. For example, when the valve rod 200 is moved along the first direction D so that the sealing disc 210 does not contact the flow guide part 300, the valve cavity 100 is communicated with the flow guide passage 310, at this time the filling valve is opened, and the raw material contained in the valve cavity 100 is filled into the container via the flow guide passage 310.

[0044] For example, in Figure 2 the feeding pipe 400 communicated with the valve cavity 100 is also shown, the feeding pipe 400 delivers the raw material into the valve cavity 100.

[0045] According to an embodiment of the present disclosure, the valve cavity 100 comprises a valve cavity body part 110 and a valve cavity contraction part 120, the valve cavity contraction part 120 is located between the valve cavity body part 110 and the flow guide part 300 in the first direction D; and in a direction perpendicular to the first direction D, the size of the valve cavity contraction part 120 is smaller than the size of the valve cavity body part 110 and is equal to or greater than the size of the sealing disc 210. Through the above design, the particles contained in the raw material can be screened during the movement of the valve rod 200 to the flow guide part 300, so that if there are particles remaining in the flow guide channel 310 when the filling valve is closed, the particles will only be small size particles and not large size particles, and the small size particles will not break the liquid surface of the remaining raw material filled in the flow guide channel 310, thereby ensuring the consistency of the remaining raw material filled in the flow guide channel at the end of filling, and finally ensuring the filling accuracy of filling. The specific screening process will be described below in combination with Figure 4A through Figure 4D .

[0046] For example, it is shown in the following description of Figure 4B : in a direction perpendicular to the first direction D, the size d1 of the valve cavity contraction part 120, the size d2 of the valve cavity body part 110, and the size d3 of the sealing disc 210. It should be noted that the size d2 of the valve cavity body part 110 in the direction perpendicular to the first direction D can vary during the entire extension of the valve cavity body part 110, in which case the size of the valve cavity contraction part 120 being smaller than the size of the valve cavity body part 110 means that the size of the valve cavity contraction part 120 is smaller than the size of the part of the valve cavity body part 110 closest to the valve cavity contraction part 120 in the first direction D. It should be noted that the size d3 of the sealing disc 210 in the direction perpendicular to the first direction D can vary, in which case the size of the valve cavity contraction part 120 being equal to or greater than the size of the sealing disc 210 means that the size of the valve cavity contraction part 120 is equal to or greater than the size of any part of the sealing disc 210 in the direction perpendicular to the first direction D.

[0047] It should be noted that the direction perpendicular to the first direction D means any direction perpendicular to the first direction D.

[0048] Figure 4A , Figure 4B , Figure 4C and Figure 4Dis a simplified schematic diagram showing the movement process of the sealing disc in the filling valve moving towards the flow guide part according to the embodiment of the present disclosure. For example, the edge of the sealing disc 210 close to one end of the flow guide part 300 is called the first edge 210E, and the edge of the valve cavity contraction part 120 away from one end of the flow guide part 300 is called the second edge 120E. For example, the valve cavity 100 communicates with the flow guide passage 310, and the raw material contained in the valve cavity 100 is filled into the container through the flow guide passage 310; as the filling proceeds, the raw material filled into the container increases, and the valve rod 200 and the sealing disc 210 begin to move towards the flow guide part 300 to prepare to close the filling valve; as the sealing disc 210 moves towards the flow guide part 300, the distance J between the sealing disc 210 and the flow guide part 300 decreases, and the length of the shortest line G between the first edge 210E and the second edge 120E becomes shorter. For example, the raw material contains particles of multiple different sizes, and in the case of Figure 4A , the length of the shortest line G between the first edge 210E and the second edge 120E is large enough, and particles of any size can pass through the gap defined by the above-mentioned shortest line G and then enter the flow guide passage 310. From Figure 4A through Figure 4B , the distance between the sealing disc 210 and the flow guide part 300 further decreases, and the length of the shortest line G between the first edge 210E and the second edge 120E further becomes shorter; when reaching Figure 4C , the first edge 210E is flush with the second edge 120E in the first direction D, and the length of the shortest line G between the first edge 210E and the second edge 120E reaches the shortest; when reaching Figure 4D , the sealing disc 210 contacts the flow guide part 300, and the filling valve is closed. In the process from Figure 4A through Figure 4B to Figure 4C , as the distance J between the sealing disc 210 and the flow guide part 300 decreases, the length of the shortest line G between the first edge 210E and the second edge 120E becomes shorter, and particles of large size are gradually blocked from passing through the gap defined by the shortest line G, so that only particles of small size can pass through the gap, so that when the filling valve is finally closed, if there are particles remaining in the flow guide passage 310, they can only be small size particles and not large size particles, and small size particles will not destroy the liquid surface of the remaining raw material filled in the flow guide passage 310, thereby ensuring the consistency of the remaining raw material filled in the flow guide passage at the end of filling, and finally ensuring the filling accuracy of the filling. It should be noted that when the gap defined by the shortest line G is just not enough for large size particles to pass through, the distance J between the sealing disc 210 and the flow guide part 300 still needs to be large enough for large size particles to pass through to ensure that large size particles that have reached between the sealing disc 210 and the flow guide part 300 can be smoothly flushed into the container; for this purpose, in the process from Figure 4A through Figure 4B to Figure 4CDuring the process, as the distance J between the sealing disc 210 and the guide portion 300 decreases, the distance J between the sealing disc 210 and the guide portion 300 needs to be maintained at a value greater than the length of the shortest connecting line G between the first edge 210E and the second edge 120E. As described above, the filling valve according to the embodiments of this disclosure can screen particles contained in the raw material during the movement of the valve stem 200 towards the guide portion 300. Larger particles are gradually blocked from entering the guide channel 310, ensuring that if particles remain in the guide channel 310 when the filling valve is finally closed, these particles are small and not large.

[0049] For example, according to an embodiment of this disclosure, the edge of the sealing disc 210 near the flow guide 300 is referred to as the first edge 210E, and the edge of the valve cavity contraction portion 120 away from the flow guide 300 is referred to as the second edge 120E. As the first edge 210E moves along the first direction D from a position away from the flow guide 300 on the second edge 120E towards a position flush with the second edge 120E, as the distance J between the sealing disc 210 and the flow guide 300 decreases, the length of the shortest connection line G between the first edge 210E and the second edge 120E becomes shorter, and the distance J between the sealing disc 210 and the flow guide 300 remains greater than the length of the shortest connection line G between the first edge 210E and the second edge 120E. Thus, as described above... Figure 4A through Figure 4D As described, on the one hand, particles contained in the raw material can be screened during the movement of the valve stem 200 and the guide section 300, and large particles are gradually blocked from entering the guide channel 310. On the other hand, it can ensure that large particles that have reached the space between the sealing disc 210 and the guide section 300 can be smoothly flushed into the container.

[0050] For example, according to an embodiment of this disclosure, in a direction perpendicular to the first direction D, the sealing disc 210 has a first dimension d3, and the valve cavity contraction portion 120 has a second dimension d1, where (second dimension d1 - first dimension d3) / 2 is not greater than the maximum size of the particles contained in the raw material. This allows for better screening of particles contained in the raw material during the movement of the valve stem 200 towards the flow guide portion 300, gradually preventing large particles from entering the flow guide channel 310. For example, the maximum size of the particles contained in the raw material refers to the maximum size of the largest particle contained in the raw material; in the case of cubic particles, the maximum size of the largest particle can be the diagonal dimension of that largest particle.

[0051] For example, according to an embodiment of this disclosure, in the first direction D, the size of the valve cavity contraction portion 120 is not less than half the maximum size of the particles contained in the raw material. Figure 4BThe size h of the valve cavity contraction portion 120 in the first direction D is shown in the figure. The size h cannot be too small, otherwise it is not enough to ensure that the large-size particles that have reached between the sealing disc 210 and the flow guide portion 300 are flushed out, thereby affecting the filling accuracy. It should be noted that the size h also cannot be too large, otherwise the large-size particles can be blocked too early, resulting in a large number of particles being retained, affecting the normal flow of the raw material, and ultimately also affecting the filling accuracy.

[0052] For example, referring to Figure 2 , Figure 3 and Figure 4A through Figure 4D , in the first direction D, the valve cavity contraction portion 120 is directly connected with the flow guide portion 300. In this way, it is helpful to achieve the screening and blocking of large-size particles during the movement of the sealing disc 210 towards the flow guide portion 300, so that if there are particles remaining in the flow guide passage 310 when the filling valve is closed, the particles can only be small-size particles and not large-size particles.

[0053] For example, referring to Figure 2 , Figure 3 and Figure 4A through Figure 4D , in the first direction D, the valve cavity contraction portion 120 is directly connected with the valve cavity main portion 110. In this way, it is helpful to achieve the screening and blocking of large-size particles during the movement of the sealing disc 210 towards the flow guide portion 300, so that if there are particles remaining in the flow guide passage 310 when the filling valve is closed, the particles can only be small-size particles and not large-size particles.

[0054] Figure 5 is a partially simplified schematic view of a filling valve according to an embodiment of the present disclosure. For example, referring to Figure 5 , the valve cavity further comprises a valve cavity transition portion 130 connected between the valve cavity contraction portion 120 and the valve cavity main portion 110 in the first direction D, and the size of the valve cavity transition portion 130 gradually changes from the size of the valve cavity main portion 110 to the size of the valve cavity contraction portion 120 in a direction perpendicular to the first direction D. In this case, on the one hand, it is helpful to achieve the screening and blocking of large-size particles during the movement of the sealing disc 210 towards the flow guide portion 300, so that if there are particles remaining in the flow guide passage 310 when the filling valve is closed, the particles can only be small-size particles and not large-size particles; on the other hand, the cleaning of the entire valve cavity 100 will be easier, improving the efficiency of the cleaning of the valve cavity 100.

[0055] For example, according to an embodiment of the present disclosure, in a plane perpendicular to the first direction D, the cross-sectional shape of the flow guide passage 310 is circular, as will be described later Figure 8AAs shown in the figure. In this case, the flow guide channel 310 facilitates processing, and can adsorb and hold the raw materials remaining in the flow guide channel 310 when the filling valve is closed, realizing the control of the raw materials remaining in the flow guide channel 310, preventing the raw materials remaining in the flow guide channel 310 from randomly dripping, and ensuring the consistency of the raw materials remaining in the flow guide channel 310.

[0056] For example, in a plane perpendicular to the first direction D, the cross-sectional shape of the flow guide channel 310 is a polygon, and the number of sides of the polygon is greater than or equal to 5. In this case, compared with the case where the cross section of the flow guide channel 310 is circular, the particle passing property of the flow guide channel 310 is better, the effect of preventing the raw materials remaining in the flow guide channel 310 from randomly dripping is better, and the consistency of the raw materials remaining in the flow guide channel is better ensured.

[0057] For example, as will be described later Figure 6B , the cross-sectional shape of the flow guide channel 310 is a polygon, and the number of sides of the polygon is 6. In this case, the particle passing property of the flow guide channel 310 is better, the adsorption ability of the flow guide channel 310 to the raw materials remaining in it is the strongest, the effect of preventing the raw materials remaining in the flow guide channel 310 from randomly dripping is the best, and the consistency of the raw materials remaining in the flow guide channel is better ensured.

[0058] For example, according to the embodiments of the present disclosure, in a plane perpendicular to the first direction D, the maximum size of the flow guide channel 310 is 6-9 mm. For example, in a plane perpendicular to the first direction D, the cross-sectional shape of the flow guide channel 310 is circular, and in this case, in a plane perpendicular to the first direction D, the maximum size of the flow guide channel 310 is the diameter of the circle. For example, in a plane perpendicular to the first direction D, the cross-sectional shape of the flow guide channel 310 is a polygon, and in this case, in a plane perpendicular to the first direction D, the maximum size of the flow guide channel 310 is the diameter of the circumscribed circle of the polygon. According to the embodiments of the present disclosure, in a plane perpendicular to the first direction D, the maximum size of the flow guide channel 310 cannot be too small (for example, less than 6 mm), otherwise the flow area of the raw materials is small, the filling efficiency is low, and the particle passing is not good; in a plane perpendicular to the first direction D, the maximum size of the flow guide channel 310 cannot be too large (for example, greater than 9 mm), otherwise the raw materials remaining in the flow guide channel 310 cannot be adsorbed when the filling valve is closed, and the raw materials remaining in the flow guide channel 310 are prone to randomly drip.

[0059] For example, according to the embodiment of the present disclosure, in the first direction D, the size of the flow guide channel 310 is not less than 30 mm. In the moment when the sealing disc 210 contacts the flow guide part 300 to close the filling valve, the raw material will be squeezed and sprayed out; if the flow guide part 300 is not provided or is too short, the raw material will be sprayed out in a radial manner, which is not conducive to the control of the raw material at the end of filling. By providing the flow guide part 300 and setting the size of the flow guide channel 310 to be not less than 30 mm, it is helpful to control the raw material at the end of filling, the flow guide channel 310 adsorbs and holds the raw material remaining in it, prevents the raw material from randomly dripping, and effectively ensures the consistency of the raw material remaining in the flow guide channel. It should be noted that, in the first direction D, the size of the flow guide channel 310 is preferably not greater than 100 mm, otherwise it will increase the filling resistance during filling and increase the processing cost.

[0060] Figure 6A The residual liquid in the flow guide channel is shown. Referring to Figure 6A When the filling valve is closed at the end of filling, in addition to the column of liquid raw material adsorbed and held in the flow guide channel, there will also be liquid raw material attached to the side wall of the flow guide channel below the column of liquid raw material. This part of the liquid raw material will flow downward under the action of gravity and randomly drip. If the raw material randomly drips outside the container, it will affect the appearance and cleanliness of the container, which is not conducive to sales; if the raw material randomly drips to the position to be sealed of the container, it may cause the container to be not tightly sealed later, resulting in leakage of the raw material; if the raw material randomly drips into the container, it may affect the filling accuracy. Therefore, it is necessary to control the raw material remaining in the flow guide channel at the end of filling and flowing downward under the action of gravity, to ensure that this part of the raw material is not randomly dripped but is flushed into the container each time, so as to neither waste the raw material nor affect the appearance and cleanliness of the container, nor affect the later sealing of the container, and nor affect the filling accuracy.

[0061] Figure 6B is a structural schematic diagram of a flow guide part in a filling valve according to the embodiment of the present disclosure, Figure 7A is a sectional schematic diagram of the flow guide part taken along the first direction Figure 1 , Figure 7B is a sectional schematic diagram of the flow guide part taken along the first direction Figure 2 . Referring to Figure 6B , Figure 7A and Figure 7BIn the filling valve according to the embodiment of the present disclosure, in the first direction D, the central portion of the end surface 300S of the flow guide portion 300 away from the valve cavity contraction portion 120 is a spherical surface 300S1 recessed toward the valve cavity contraction portion 120, the spherical surface 300S1 and the end surface 300S are concentrically arranged, and the orthographic projection of the flow guide passage 310 on the end surface 300S is located within the region where the spherical surface 300S1 is located. Through the above arrangement, when the raw material remaining in the flow guide passage 310 flows downward under the action of gravity, it will flow along the spherical surface 300S1 and gather to the edge of the spherical surface 300S1 instead of randomly gathering to any position, greatly reducing the possibility of random dripping. The raw material gathered at the edge of the spherical surface 300S1 will be flushed into the container together with the raw material contained in the valve cavity 100 at the next filling, thereby effectively realizing the control of the raw material remaining in the flow guide passage 310 at the end of filling and flowing downward under the action of gravity, reducing the possibility of random dripping of this part of raw material, and avoiding a series of problems caused by random dripping of raw material. In addition, during the filling process, the raw material may splash and be splashed onto the end surface 300S when entering the container through the flow guide passage 310. The raw material splashed onto the end surface 300S also needs to be controlled to prevent random dripping. By arranging the spherical surface 300S1, the raw material splashed on the spherical surface 300S1 will also flow along the spherical surface 300S1 and gather to the edge of the spherical surface 300S1 instead of randomly gathering to any position, greatly reducing the possibility of random dripping. The raw material gathered at the edge of the spherical surface 300S1 will be flushed into the container together with the raw material contained in the valve cavity 100 at the next filling.

[0062] For example, the spherical surface 300S1 is located at the central portion of the end surface 300S, without extending to the entire end surface 300S. In this way, it can be ensured that the edge of the spherical surface 300S1 is not too far away from the outlet of the flow guide passage 310 located in the end surface 300S, so that the raw material flowing out of the flow guide passage 310 at the next filling can flush the raw material gathered at the edge of the spherical surface 300S1 into the container, ensuring effective control of the raw material remaining in the flow guide passage 310 at the end of filling and flowing downward under the action of gravity, and preventing random dripping. For example, the distance from the edge of the spherical surface 300S1 to the nearest outlet of the flow guide passage 310 located in the end surface 300S is within 5 mm.

[0063] The orthographic projection of the flow guide passage 310 on the end surface 300S is located within the region where the spherical surface 300S1 is located; in this case, if the number of flow guide passages 310 is 1, the flow guide passage 310 is concentrically arranged with the spherical surface 300S1; if the number of flow guide passages 310 is multiple, the flow guide passages 310 are arranged as regularly as possible within the region where the spherical surface 300S1 is located.

[0064] For example, the radius of the spherical surface 300S1 can be reasonably designed according to actual conditions. On the one hand, the radius of the spherical surface 300S1 cannot be too large, otherwise the effect of the liquid raw material flowing and gathering to the edge of the spherical surface 300S1 along the spherical surface 300S1 is poor; on the other hand, the radius of the spherical surface 300S1 cannot be too small, otherwise the outlet of each flow guide channel 310 is more uneven, increasing the risk of dripping.

[0065] For example, continuing to refer to Figure 6B 、 Figure 7A and Figure 7B , the end surface 300S of the flow guide part 300 away from the valve cavity contraction part 120 further comprises an inclined surface 300S2 arranged around the spherical surface 300S1, the inclined surface 300S2 is inclined to extend towards the valve cavity contraction part 120 as it is away from the spherical surface 300S1 within the end surface 300S. By arranging the inclined surface 300S2, the raw material splashed on the inclined surface 300S2 will flow and gather to the edge of the spherical surface 300S1 along the inclined surface 300S2 instead of randomly gathering to any position, greatly reducing the possibility of random dripping of the raw material, and the raw material gathered at the edge of the spherical surface 300S1 will be flushed into the container together with the raw material flowing out of the flow guide channel 310 during the next filling. In this way, under the joint action of the spherical surface 300S1 and the inclined surface 300S2, the raw material splashed to any position of the end surface 300S is effectively controlled. For example, the spherical surface 300S1 and the inclined surface 300S2 are adjacent to each other and do not have other areas between them. For example, the inclination angle of the inclined surface 300S2 can be reasonably designed as needed. On the one hand, in order to control the raw material splashed on the inclined surface 300S2, the larger the inclination angle of the inclined surface 300S2, the better, to ensure that the raw material splashed on the inclined surface 300S2 can flow and gather to the edge of the spherical surface 300S1 smoothly; on the other hand, when cleaning and filling the valve, a coupler needs to be connected at the end surface 300S to close the end surface 300S, so the inclination angle of the inclined surface 300S2 cannot be too large, otherwise it will affect the sealing of the coupler to the end surface 300S.

[0066] For example, refer to Figure 7BIn the filling valve according to the embodiments of the present disclosure, the end surface 300S of the flow guide portion 300 away from the valve cavity contraction portion 120 further comprises a flange 300P arranged along the edge of the spherical surface 300S1 to surround the spherical surface 300S1. The flange 300P is arranged along the edge of the spherical surface 300S1, and the raw material remaining in the flow guide channel 310 will flow along the spherical surface 300S1 and gather to the flange 300P when flowing downward under the action of gravity, the raw material splashed onto the spherical surface 300S1 will also flow along the spherical surface 300S1 and gather to the flange 300P, and the raw material splashed onto the inclined surface 300S2 will also flow along the inclined surface and gather to the flange 300P. The flange 300P protrudes from the end surface 300S, which is conducive to the raw material flowing out of the flow guide channel 310 in the next filling to flush the raw material gathered at the flange 300P into the container. For example, in the case where the flange 300P is arranged, the filling valve according to the embodiments of the present disclosure is more suitable for filling low-viscosity raw materials such as water, fruit juice, etc. The low viscosity of the raw material can ensure that the raw material can flow smoothly and gather at the flange 300P. For example, in the case where the flange 300P is arranged, the viscosity of the raw material is not greater than 500 cP.

[0067] For example, referring to Figure 7B In the filling valve according to the embodiments of the present disclosure, the flange 300P comprises a plurality of grooves 300G; in the first direction D, each of the plurality of grooves 300G is recessed from the end surface of the flange 300P away from the valve cavity contraction portion 120 towards the valve cavity contraction portion 120. By arranging a plurality of grooves 300G on the flange 300P, the raw material gathered on the flange 300P will not gather together but be dispersed. Since the contact area is large at the groove 300G and the adsorption force is strong, the raw material gathered on the flange 300P will be dispersed to the plurality of grooves 300G, on the one hand, enhancing the adsorption capacity of the raw material to prevent random dripping, on the other hand, dispersing the raw material can prevent the raw material from dripping in advance due to gathering together, and on the other hand, the gathering position of the raw material is fixed at the groove 300G, further enhancing the control ability of the raw material.

[0068] For example, continuing to refer to Figure 6B , Figure 7A and Figure 7BThe flow guide part 300 includes a plurality of flow guide channels 310; the orthographic projection of each of the plurality of flow guide channels 310 on the end face 300S is located in the region where the spherical surface 300S1 is located. In this way, the raw material remaining in any of the flow guide channels 310 will flow along the spherical surface 300S1 and gather at the edge of the spherical surface 300S1 under the action of gravity instead of randomly gathering at any position, so that the raw material remaining in any of the flow guide channels 310 at the end of filling and flowing downward under the action of gravity is controlled, the possibility of random dripping of the raw material is reduced, and a series of problems caused by random dripping are avoided. For example, as described above, the edge of the spherical surface 300S1 is within 5 mm from the outlet of the nearest flow guide channel 310 located in the end face 300S, so that the raw material flowing out of the flow guide channel 310 will flush the raw material gathered at the edge of the spherical surface 300S1 into the container during the next filling.

[0069] Figure 8A is a schematic view of the end face of the flow guide part in the filling valve according to an embodiment of the present disclosure, Figure 8B is Figure 8A is a side view of the flow guide part of Figure 8A and Figure 8B In the filling valve according to an embodiment of the present disclosure, the flow guide part 300 includes a plurality of flow guide channels 310; the end face 300S of the flow guide part 300 away from the valve cavity contraction part 120 is provided with a plurality of flanges 310P, one flange 310P is arranged to surround one flow guide channel 310; the end face 300S of the flow guide part 300 away from the valve cavity contraction part 120 further includes an inclined surface 300S2' arranged around the plurality of flanges 310P, the inclined surface 300S2' is inclined to extend towards the valve cavity contraction part 120 away from the plurality of flanges 310P in the end face 300S. Through the above arrangement, on the one hand, the raw material remaining in each of the flow guide channels 310 will gather at the corresponding flange 310P instead of randomly gathering at any position when flowing downward under the action of gravity, so that the raw material remaining in each of the flow guide channels 310 at the end of filling and flowing downward under the action of gravity is controlled; on the other hand, the raw material splashed to the end face 300S will gather at the flange 310P along the inclined surface 300S2'; the raw material flowing out of the flow guide channel 310 will flush the raw material gathered at the flange 310P into the container during the next filling; therefore, the possibility of random dripping of the raw material is reduced, and a series of problems caused by random dripping are avoided.

[0070] For example, the flange 310P protrudes from the end face 300S, and the inner edge of the flange 310P is aligned with the edge of the flow guide channel 310 surrounded thereby.

[0071] For example, the inclination angle of the inclined surface 300S2' can be reasonably designed according to requirements. On the one hand, in order to control the raw material sputtered on the inclined surface 300S2', the larger the inclination angle of the inclined surface 300S2' is, the better, so as to ensure that the raw material sputtered on the inclined surface 300S2' can flow smoothly and gather at the flange 310P; on the other hand, when cleaning the filling valve, a coupler needs to be connected to the end surface 300S to close the end surface 300S, so the inclination angle of the inclined surface 300S2' should not be too large, otherwise it will affect the sealing of the coupler to the end surface 300S.

[0072] According to an embodiment of the present disclosure, a filling method is disclosed, which comprises filling a container with raw material containing particles by using the filling valve as described above. The filling valve according to the embodiment of the present disclosure can ensure the consistency of the residual raw material filled in the flow guide channel at the end of filling, can effectively control the raw material remaining in the flow guide channel 310 and flowing downward under the action of gravity at the end of filling, and can effectively control the raw material sputtered on the end surface 300S of the flow guide 300, greatly improving the filling accuracy of each filling.

[0073] For example, the filling method according to the embodiment of the present disclosure further comprises controlling the mass percentage of particles in the raw material to be not more than 10%. In the filling valve according to the embodiment of the present disclosure, the valve cavity 100 comprises a valve cavity contraction portion 120, in which case, if the particle content in the raw material is too high, particle blockage is likely to occur during the movement of the sealing disc 210 towards the flow guide 300. By controlling the mass percentage of particles in the raw material to be not more than 10%, particle blockage can be effectively avoided.

[0074] For example, in the first direction D, the central portion of the end face 300S of the flow guide 300 away from the valve cavity contraction portion 120 is a spherical surface 300S1 recessed toward the valve cavity contraction portion 120, the spherical surface 300S1 and the end face 300S are concentrically arranged, and the orthogonal projection of the flow guide passage 310 on the end face 300S is located within the region where the spherical surface 300S1 is located; the end face 300S further comprises a flange 300P arranged around the spherical surface 300S1 to surround the spherical surface 300S1; and the filling method according to the embodiment of the present disclosure further comprises: controlling the viscosity of the raw material to be not greater than 500 cP. For example, in the first direction D, the central portion of the end face 300S of the flow guide 300 away from the valve cavity contraction portion 120 is a spherical surface 300S1 recessed toward the valve cavity contraction portion 120, the spherical surface 300S1 and the end face 300S are concentrically arranged, and the orthogonal projection of the flow guide passage 310 on the end face 300S is located within the region where the spherical surface 300S1 is located; the end face 300S further comprises an inclined surface 300S2 arranged around the spherical surface 300S1, the inclined surface 300S2 is inclined to extend toward the valve cavity contraction portion 120 away from the spherical surface 300S1 within the end face 300S; the end face 300S further comprises a flange 300P arranged between the spherical surface 300S1 and the inclined surface 300S2, the flange 300P surrounds the spherical surface 300S1; and the filling method according to the embodiment of the present disclosure further comprises: controlling the viscosity of the raw material to be not greater than 500 cP. That is, in the case of arranging the flange 300P, the filling valve according to the embodiment of the present disclosure is more suitable for filling raw materials with low viscosity, such as water, fruit juice, etc., and the low viscosity of the raw material can ensure that the raw material can flow smoothly to the flange 300P. For example, in the case of arranging the flange 300P, the viscosity of the raw material is not greater than 500 cP. It should be noted that, in the case of not arranging the flange 300P, the filling valve according to the embodiment of the present disclosure is suitable for filling raw materials with any viscosity.

[0075] The above merely describes exemplary embodiments of the present disclosure, but is not intended to limit the protection scope of the present disclosure, which is defined by the appended claims.

Claims

1. A filling valve for filling a container with a raw material containing particles, the filling valve comprising: Valve cavity; A valve stem, disposed within the valve cavity and having a sealing disc; The flow guide portion, connected to the valve cavity and including a flow guide channel, wherein, The valve stem is movable in a first direction. When the valve stem moves in the first direction and the sealing disc contacts the flow guide, the valve cavity is not connected to the flow guide channel. When the valve stem moves in the first direction and the sealing disc does not contact the flow guide, the valve cavity is connected to the flow guide channel. The valve chamber includes a valve chamber body and a valve chamber contraction section, wherein the valve chamber contraction section is located between the valve chamber body and the flow guide section in the first direction; and In a direction perpendicular to the first direction, the size of the valve cavity contraction portion is smaller than the size of the valve cavity body portion and greater than or equal to the size of the sealing disc, so that particles contained in the raw material are screened during the movement of the valve stem toward the guide portion.

2. The filling valve according to claim 1, wherein, The edge of the sealing disc near the flow guide is called the first edge, and the edge of the valve cavity contraction part away from the flow guide is called the second edge. As the first edge moves along the first direction from a position on the side of the second edge away from the flow guide toward a position flush with the second edge, the length of the shortest line connecting the first edge and the second edge decreases as the distance between the sealing disc and the flow guide decreases, and the distance between the sealing disc and the flow guide remains greater than the length of the shortest line connecting the first edge and the second edge.

3. The filling valve according to claim 1, wherein, In a direction perpendicular to the first direction, the sealing disc has a first size, and the valve cavity contraction has a second size, (second size - first size) / 2 being no greater than the maximum size of the particles contained in the raw material.

4. The filling valve according to claim 1, wherein, In the first direction, the size of the valve cavity contraction is not less than half the maximum size of the particles contained in the raw material.

5. The filling valve according to claim 1, wherein, In the first direction, the valve cavity contraction portion is directly connected to the flow guide portion.

6. The filling valve according to claim 1, wherein, In the first direction, the valve cavity contraction portion is directly connected to the valve cavity body portion; or, The valve cavity further includes a valve cavity transition portion connected between the valve cavity contraction portion and the valve cavity body portion in the first direction, wherein the size of the valve cavity transition portion gradually changes from the size of the valve cavity body portion to the size of the valve cavity contraction portion in a direction perpendicular to the first direction.

7. The filling valve according to claim 1, wherein, In a plane perpendicular to the first direction, the cross-sectional shape of the flow guiding channel is circular; or, In a plane perpendicular to the first direction, the cross-sectional shape of the flow channel is a polygon, and the polygon has more than or equal to 5 sides.

8. The filling valve according to claim 7, wherein, The cross-sectional shape of the flow channel is polygonal, and the polygon has 6 sides.

9. The filling valve according to claim 1, wherein, In a plane perpendicular to the first direction, the maximum size of the flow channel is 6-9 mm.

10. The filling valve according to claim 1, wherein, In the first direction, the size of the flow channel is not less than 30 mm.

11. The filling valve according to any one of claims 1-10, wherein, In the first direction, the central portion of the end face of the guide portion away from the valve cavity contraction portion is a spherical surface concave towards the valve cavity contraction portion. The spherical surface and the end face are concentrically arranged, and the orthographic projection of the guide channel on the end face is located in the area where the spherical surface is located.

12. The filling valve according to claim 11, wherein, The end face also includes an inclined surface disposed around the spherical surface, the inclined surface being inclined such that it extends toward the valve cavity contraction portion as it moves away from the spherical surface within the end face.

13. The filling valve according to claim 11, wherein, The end face also includes a flange disposed along the edge of the sphere to surround the sphere.

14. The filling valve according to claim 13, wherein, The flange includes multiple grooves; In the first direction, each of the plurality of grooves is recessed from the end face of the flange away from the valve cavity contraction toward the valve cavity contraction.

15. The filling valve according to claim 11, wherein, The flow guiding part includes a plurality of flow guiding channels; The orthographic projections of the multiple flow channels on the end face are all located within the area where the sphere is located.

16. The filling valve according to any one of claims 1-10, wherein, The flow guiding part includes a plurality of flow guiding channels; The end face of the flow guide section away from the valve cavity contraction section is provided with multiple flanges, and each flange is configured to surround a flow guide channel; The end face also includes an inclined surface disposed around the plurality of flanges, the inclined surface being inclined such that it extends toward the valve cavity contraction portion as it moves away from the plurality of flanges within the end face.

17. A filling method, comprising: The filling valve according to any one of claims 1-16 is used to fill the container with raw material containing particles.

18. The method of claim 17, further comprising: The mass percentage of the particles in the raw material is controlled to not exceed 10%.

19. The method of claim 17, wherein, In the first direction, the central portion of the end face of the flow guide away from the valve cavity contraction portion is a spherical surface that is concave towards the valve cavity contraction portion. The spherical surface and the end face are concentrically arranged, and the orthographic projection of the flow guide channel on the end face is located in the area where the spherical surface is located. The end face further includes a flange disposed along the edge of the sphere to surround the sphere; and The method further includes controlling the viscosity of the raw material to be no greater than 500 cP.

20. The method of claim 17, wherein, In the first direction, the central portion of the end face of the flow guide away from the valve cavity contraction portion is a spherical surface that is concave towards the valve cavity contraction portion. The spherical surface and the end face are concentrically arranged, and the orthographic projection of the flow guide channel on the end face is located in the area where the spherical surface is located. The end face also includes an inclined surface disposed around the spherical surface, the inclined surface being inclined such that it extends toward the valve cavity contraction portion as it moves away from the spherical surface within the end face; The end face further includes a flange disposed between the spherical surface and the inclined surface, the flange surrounding the spherical surface; and The method further includes controlling the viscosity of the raw material to be no greater than 500 cP.

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