Filling valve

Abstract

The utility model relates to a filling valve which comprises a valve body, a valve element assembly arranged in the valve body, a valve nozzle fixedly arranged at the bottom end of the valve body and a driving piece used for driving the valve element assembly to do reciprocating motion up and down, the valve element assembly comprises a connecting piece, and an outer core is fixedly arranged in the connecting piece. The outer core is of a pipe structure, an inner core is arranged in the outer core, the top of the inner core is fixedly connected with the connecting piece, a gap exists between the outer wall of the inner core and the inner wall of the outer core, and an air blowing opening is formed in the connecting piece and located above the top face of the outer core. By the adoption of the technical scheme, the outer core and the inner core are arranged to serve as the valve elements of the filling valve, filled materials are only left at the bottom of the gap between the outer core and the inner core, air is blown to enter the gap between the outer core and the inner core through the inner cavity of the connecting piece, then the residual materials are effectively blown away, and the filling efficiency is improved. And the filling efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the field of filling valves, and in particular relates to a filling valve. Background Art

[0002] As a key component in filling equipment, filling valves are mainly used to control the flow of liquid or gas and ensure accuracy, precision and safety during the filling process. At present, these valves are commonly used in various filling equipment, including packaging machines, to achieve fast and accurate filling of products into packaging containers.

[0003] However, after filling, the filling valve in the current packaging machine has residual material at the bottom of the valve core in the filling valve, which needs to wait for a period of time to drip out, increasing the time of the filling work. If the next filling is carried out without waiting for it to drip out, the material may drip into the packaging port, thereby affecting the hygiene of the packaging port. Summary of the invention

[0004] Purpose of the utility model: In order to overcome the defects of the prior art, the utility model provides a filling valve.

[0005] The technical solution of the utility model: a filling valve, comprising a valve body, a valve core assembly arranged inside the valve body, a valve nozzle fixedly arranged at the bottom end of the valve body, and a driving member for driving the valve core assembly to reciprocate up and down, the valve core assembly comprising a movable joint and a connecting member buckled at the bottom of the movable joint, the movable joint is fixedly connected to the output end of the driving member, an outer core is fixedly arranged in the connecting member, the outer core is in a tubular structure, and an inner core is arranged inside, the top of the inner core is fixedly connected to the connecting member, there is a gap between the outer wall of the inner core and the inner wall of the outer core, an air blowing port is opened on the connecting member, and the air blowing port is located above the top surface of the outer core;

[0006] The valve body is provided with a valve cavity and a fluid channel connected to the valve cavity, the valve mouth is provided with a discharge port connected to the valve cavity, the discharge port is a trumpet-shaped structure, and a flow guide is fixedly provided on the valve body, the flow guide includes a first flow channel and a second flow channel connected to the fluid channel and the valve cavity respectively;

[0007] The outer core includes a valve head and a valve tube. The valve head is located in the valve cavity. The valve head can be moved to close the discharge port or the fluid channel. By setting the first flow channel and the second flow channel to cooperate with the discharge port, the extraction and pumping of materials can be achieved through one valve, thereby reducing the failure rate and production costs.

[0008] By adopting the above technical solution, the outer core and the inner core are respectively set as the valve cores of the filling valve, so that the filled material only remains at the bottom of the gap between the outer core and the inner core, and the inner cavity of the connecting piece can be inflated through the inflation port, so that the gas enters the gap between the outer core and the inner core through the inner cavity of the connecting piece, thereby effectively blowing away the residual material and improving the filling efficiency.

[0009] The utility model is further configured as follows: the valve body includes an upper valve body and a lower valve body, the upper valve body is provided with a directional member, the bottom of the upper valve body is provided with an internal thread, the upper valve body is threadedly connected to the directional member and the lower valve body respectively, and the bottom surface of the directional member abuts against the top surface of the lower valve body.

[0010] By adopting the above-mentioned further arrangement, the valve body is divided into the upper valve body and the lower valve body for detachable connection, which is convenient for assembly of internal parts of the filling valve, and a directional piece is provided. The directional piece and the lower valve body are respectively tightened by threads from both ends so that the directional piece and the lower valve head are abutted. The relative angle between the upper valve body and the lower valve body can be adjusted by adjusting the twisting angle of the directional piece, which can ensure the control of the filling surface direction of each filling valve in the same machine, and facilitate the assembly of the overall machine.

[0011] The utility model is further configured as follows: the lower valve body is provided with an assembly cavity above the fluid channel, a guide sleeve and an oil seal are sequentially arranged in the assembly cavity from top to bottom, and the valve pipe passes through the directional member, the guide sleeve and the oil seal respectively.

[0012] By adopting the above further configuration, the stability of the up and down movement of the outer core is improved through the provision of the guide sleeve and the oil seal, and the sealing performance of the upper valve body and the lower valve body is greatly improved.

[0013] Further configuration of the utility model: the valve head includes a sealing ring for contacting the upper valve body, the valve head is a component with upper and lower parts both being conical in shape, a sealing connector is provided between the valve mouth and the valve body, the sealing connector is provided with a conical channel for fitting the lower surface of the valve head, and the conical channel is connected to the valve cavity and the discharge port respectively.

[0014] By adopting the above-mentioned further arrangement, a sealing ring is arranged to contact the inner wall of the lower valve body to isolate the discharge port from the fluid channel and avoid hard contact and wear between the outer core and the lower valve body to enhance the stability of filling, and the worn sealing ring can be replaced to reduce maintenance costs.

[0015] The utility model is further configured as follows: a stepped surface is provided in the conical passage on the sealing connector, and the side walls on the upper and lower sides of the stepped surface are respectively a gap surface and a sealing surface that can fit with the lower surface of the valve head.

[0016] By adopting the above-mentioned further arrangement, the portion that fits with the lower surface of the valve head is reduced, thereby ensuring the sealing. At the same time, the reduction in the fitting area reduces the sealing surface that needs to be precisely processed, reduces the probability of error caused by processing, and makes the filling process more stable.

[0017] The utility model is further configured as follows: a fixing piece is fixedly arranged on the top end, the fixing piece abuts against the inner wall of the connecting piece and the movable joint respectively, and a spring is arranged between the bottom surface of the fixing piece and the top surface of the outer core.

[0018] With the above further arrangement, the spring continuously squeezes the upper and lower ends, so that the fixing part, the inner core and the movable joint are in closer contact, and the outer core is in closer contact with the sealing connector.

[0019] The utility model is further configured as follows: the valve body includes an orientation ring, the orientation ring is arranged on the outer surface of the valve body, and the upper valve body side wall is provided with a reserved opening for passing an air pipe to connect the air inflation port.

[0020] With the above further arrangement, the directional ring can assist in determining the positional relationship between the upper valve body and the lower valve body, making the installation of the filling valve more convenient.

[0021] The utility model is further configured as follows: the inner core comprises a trumpet-shaped bottom, and the inner wall of the bottom of the outer core is provided with a chamfer that can fit with the inclined surface of the bottom of the inner core.

[0022] The above further configuration ensures that the inner core and the outer core are in stable contact with each other, prevents materials from passing through the gap between the inner core and the outer core, and controls the residual materials to gather at the trumpet-shaped bottom of the inner core under the action of gravity after the inner core is extended, so that the gas can blow the materials off together. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of a specific embodiment of the utility model;

[0024] Figure 2 It is a schematic diagram of the main structure of a specific embodiment of the utility model;

[0025] Figure 3 for Figure 2 Schematic diagram of the AA section structure;

[0026] Figure 4 This is a schematic diagram of the overall structure of the valve body in a specific embodiment of the utility model;

[0027] Figure 5 This is a schematic diagram of the main structure of the valve body in a specific embodiment of the utility model;

[0028] Figure 6 for Figure 5Schematic diagram of the structure of the middle BB section;

[0029] Figure 7 This is a schematic diagram of the overall structure of the valve core assembly in a specific embodiment of the utility model;

[0030] Figure 8 This is a schematic diagram of the main structure of the valve core assembly in a specific embodiment of the utility model;

[0031] Fig. 9 for Figure 8 Schematic diagram of the CC cross-section structure;

[0032] Fig.10 It is a schematic diagram of the overall structure of the sealing connector in a specific embodiment of the utility model.

[0033] In the figure: 1. valve body; 2. driving member; 3. lower valve body; 4. connecting member; 41. air inflation port; 5. outer core; 51. valve head; 52. valve pipe; 53. sealing ring; 6. inner core; 7. movable joint; 8. directional member; 9. oil seal; 10. guide sleeve; 11. fluid channel; 12. guide member; 13. first flow channel; 14. second flow channel; 15. valve cavity; 16. valve mouth; 161. discharge port; 17. upper valve body; 18. assembly cavity; 19. sealing connecting member; 191. stepped surface; 192. gap surface; 193. sealing surface; 20. fixing member. DETAILED DESCRIPTION

[0034] The technical scheme in this embodiment will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] It should be noted that in the description of the present invention, all directional indications (such as up, down, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0036] In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. In the description of the present invention, the meaning of "several" is at least two, such as two, three, etc., unless otherwise clearly and specifically limited.

[0037] like Figure 1-9As shown, a filling valve comprises a valve body 1, a valve core assembly arranged inside the valve body 1, a valve nozzle 16 threadedly connected to the bottom end of the valve body 1, and a driving member 2 for driving the valve core assembly to reciprocate up and down. The valve core assembly comprises a movable joint 7 and a connecting member 4. An annular groove is provided on the top of the connecting member 4. The bottom structure of the movable joint 7 can be correspondingly buckled in the annular groove of the connecting member 4, and the movable joint 7 and the connecting member 4 can be relatively rotated and adjusted to control the installation angle while ensuring concentricity. At the same time, the width of the annular groove of the connecting member 4 is slightly larger than the width of the buckled mating part at the bottom of the movable joint 7, so that the connecting member 4 and the movable joint 7 can be relatively displaced in the up and down directions.

[0038] The connector 4 is cylindrical in structure as a whole, with a through hole provided at the center, and an air inlet 41 is provided on the connector 4, so that the outside of the connector 4 is connected to the through hole inside the connector 4, and the air inlet 41 can be connected to a trachea joint for connecting a trachea to introduce nitrogen or sterile compressed air, so as to realize inflation of the inside of the connector 4, and a reserved opening for passing a trachea joint or a trachea is provided on the side wall of the upper valve body 17;

[0039] The movable joint 7 is fixedly connected to the output end of the driving member 2. The outer core 5 is connected to the inner thread of the central through hole of the connecting member 4. The outer core 5 is a tube structure and an inner core 6 is arranged inside. The outer core 5 and the inner core 6 can move relative to each other. The movement of the output end of the driving member 2 drives the movable joint 7, the connecting member 4 and the outer core 5 to move together.

[0040] like Fig. 9 As shown, there is a gap between the outer wall of the inner core 6 and the inner wall of the outer core 5, and the air inflation port 41 is located above the top surface of the outer core 5. The bottom of the inner core 6 is in a trumpet-shaped structure, which can effectively reduce the resistance during material flow, make the flow rate of material filling more stable and uniform, and reduce the required driving force or pressure, thereby reducing energy consumption and operating costs. At the same time, the trumpet-shaped discharge port 161 has no sharp edges or corners, which helps to reduce the accumulation of residual materials and is relatively easy to clean, which is conducive to maintaining hygiene.

[0041] The inner wall at the bottom of the outer core 5 is provided with a chamfer that can fit with the inclined surface of the bottom of the inner core 6, so as to ensure the stable fit between the inner core 6 and the outer core 5 and prevent the material from entering the connecting piece 4 through the gap between the inner core 6 and the outer core 5 during filling. At the same time, when the inner core 6 is extended, the fitting parts of the inner core 6 and the outer core 5 are separated, and the gap between the inner core 6 and the outer core 5 is connected to the outlet of the valve mouth 16. The residual material gathers at the trumpet-shaped bottom of the inner core 6 under the action of gravity, and nitrogen or sterile compressed air is blown into the inner cavity of the connecting piece 4 through the air blowing port 41, so that the gas enters the gap between the outer core 5 and the inner core 6 through the inner cavity of the connecting piece 4, thereby effectively blowing away the residual material and improving the filling efficiency.

[0042] The top of the inner core 6 is processed with an external thread and is connected to a fixing part 20. The fixing part 20 can be a nut and is threadedly connected to the top of the inner core 6. The fixing part 20 contacts the inner wall of the connecting part 4 and the movable joint 7 respectively. When the movable joint 7 moves downward, the fixing part 20 is squeezed to move downward, thereby driving the inner core 6 to move downward, so that the inner core 6 and the outer core 5 move simultaneously.

[0043] The outer core 5 is located below the fixing member 20. An elastic member is provided between the bottom surface of the fixing member 20 and the top surface of the outer core 5. The elastic member can be a telescopic spring. After the output end of the driving member 2 moves downward, the outer core 5 is squeezed to make it contact with the sealing connector 19 and the seal is tighter.

[0044] The valve body 1 includes an upper valve body 17, a lower valve body 3 and a directional member 8. The directional member 8 is arranged in the upper valve body 17. An internal thread is provided at the bottom of the upper valve body 17. The upper valve body 17 is threadedly connected to the directional member 8 and the lower valve body 3 respectively. After the upper valve body 17 is connected to the lower valve body 3, the bottom surface of the directional member 8 abuts against the top surface of the lower valve body 3.

[0045] The valve body 1 is divided into an upper valve body 17 and a lower valve body 3, which can be detachably connected by threads, which is convenient for the assembly of the internal parts of the filling valve, and a directional member 8 is provided. The directional member 8 and the lower valve body 3 are screwed in by threads from both ends respectively. An directional ring is provided on the outside of the valve body 1, and the directional ring is arranged on the outer surface of the valve body 1. After the screwing angle of the directional member 8 is adjusted according to the direction of the directional ring, the lower valve body 3 is screwed to make the directional member 8 abut against the lower valve body 3, so as to adjust the relative angle between the upper valve body 17 and the lower valve body 3, which can ensure the control of the filling surface direction of each filling valve in the same machine, facilitate the assembly of the overall machine, and can stably connect the upper valve body 17 and the lower valve body 3.

[0046] A valve cavity 15 and a fluid channel 11 connected to the valve cavity 15 are provided in the valve body 1. The valve cavity 15 is wider than the fluid channel 11. A discharge port 161 connected to the valve cavity 15 is provided on the valve mouth 16. The discharge port 161 is a trumpet-shaped structure and plays a guiding role for the filled material. A guide member 12 is fixedly arranged on the valve body 1. The guide member 12 includes a first flow channel 13 and a second flow channel 14 respectively connected to the fluid channel 11 and the valve cavity 15. The outer core 5 includes a valve head 51 and a valve tube 52. The valve head 51 is a component with both upper and lower parts being conical. The widest part of the valve head 51 is wider than the fluid channel 11. The valve head 51 is located in the valve cavity 15. The valve head 51 can be moved to close the discharge port 161 or the fluid channel 11.

[0047] The lower valve body 3 is provided with an assembly cavity 18 above the fluid channel 11, and a guide sleeve 10 and an oil seal 9 are provided in the assembly cavity 18 from top to bottom. The valve tube 52 passes through the directional member 8, the guide sleeve 10 and the oil seal 9 respectively. The stability of the up and down movement of the outer core 5 is improved by the provided guide sleeve 10 and the oil seal 9, and the sealing performance of the upper valve body 17 and the lower valve body 3 is greatly improved.

[0048] A sealing ring 53 for contacting the upper valve body 17 is provided on the valve head 51. The sealing ring 53 is provided to contact the inner wall of the lower valve body 3 to isolate the discharge port 161 from the fluid channel 11, and avoid damage caused by hard contact between the outer core 5 and the lower valve body 3, so as to enhance the stability of filling, and the worn sealing ring 53 can be replaced to reduce maintenance costs.

[0049] A sealing connector 19 is provided between the valve mouth 16 and the valve body 1 . The sealing connector 19 is provided with a conical channel for fitting against the lower surface of the valve head 51 . The conical channel is connected to the valve cavity 15 and the discharge port 161 , respectively.

[0050] like Fig.10 As shown, a stepped surface 191 is provided in the conical channel on the sealing connector 19, and the side walls on the upper and lower sides of the stepped surface 191 are respectively a gap surface 192 and a sealing surface 193 that can be fitted with the lower surface of the valve head 51. The sealing connector 19 is made of polytetrafluoroethylene material, which is relatively soft and prone to processing errors. The gap surface 192 can be roughly processed and does not fit with the lower surface of the valve head 51, and the sealing surface 193 is finely processed, thereby reducing the portion that fits with the lower surface of the valve head 51, ensuring its sealing while preventing an error from occurring as a whole, causing the plane to have an amplitude, thereby affecting the fit with the lower surface of the valve head 51. The reduction in the fitting area reduces the sealing surface 193 that needs to be precisely processed, reduces the probability of errors caused by processing, and makes the filling process more stable.

[0051] Specifically, the first flow channel 13 can be connected to the material cylinder through a conduit, and the second flow channel 14 can be connected to the piston barrel through a conduit. When working, the package is a self-supporting bag. After the self-supporting bag is fixed below the valve nozzle 16 and the bag mouth is aligned with the discharge port 161, the outer core 5 and the inner core 6 move downward with the output end of the driving member 2 and contact the sealing surface 193 on the sealing connector 19 to block the discharge port 161. At this time, the material enters the second flow channel 14 through the first flow channel 13, the fluid channel 11, and the valve cavity 15, and then enters the piston barrel. At this time, the state of the valve core component is as follows: Fig. 9 As shown, the inner core 6 and the outer core 5 are separated at the bottom of the bonding, and nitrogen or sterile compressed air is introduced from the air blowing port 41 into the gap between the inner core 6 and the outer core 5, so that the gas blown in can blow away the materials remaining at the bottom of the inner core 6 and the outer core 5 through the gap, and the introduced gas can also enter the self-supporting bag, so that the self-supporting bag is stretched and expanded, ensuring that the self-supporting bag can be fully filled, thereby increasing the flow rate of material filling until the filling is completed, and the introduced nitrogen can also sterilize the inside of the self-supporting bag, improve the sanitary quality of the environment where the filling material is located, extend the shelf life of the material, and ensure that the product maintains quality and freshness during storage and transportation, so that no material is left at the bottom of the inner core 6 and the outer core 5 in the next step of filling, ensuring the cleanliness of the bag mouth of the self-supporting bag;

[0052] Then, the output end of the driving member 2 is controlled to move upward, driving the movable joint 7 to move upward and relatively displace with the connecting member 4 until the movable joint 7 contacts the upper end surface of the annular groove of the connecting member 4, and then driving the connecting member 4 to move upward, and at the same time driving the outer core 5 to move upward. Since the fixing member 20 is not connected to the movable joint 7, and the outer core 5 continuously squeezes the telescopic spring, the inner core 6 is constantly in contact with the movable joint 7 under the action of the telescopic spring. Therefore, the inner core 6 moves upward a distance more than the outer core 5, so that the bottom of the inner core 6 fits with the bottom of the outer core 5. After the outer core 5 moves upward a certain distance, the fluid channel 11 is blocked. At this time, the material in the piston barrel will quantitatively flow out from the discharge port 161 through the second flow channel 14 and the valve cavity 15, and since the bottom of the inner core 6 fits with the bottom of the outer core 5, the situation in which the material during filling flows up through the gap between the inner core 6 and the outer core 5 into the connecting member 4 is avoided, so as to fill the self-supporting bag arranged at the bottom of the discharge port 161 and complete the filling.

[0053] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that technical personnel in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A filling valve, comprising a valve body (1), a valve core assembly arranged inside the valve body (1), a valve nozzle (16) fixedly arranged at the bottom end of the valve body (1), and a driving member (2) for driving the valve core assembly to reciprocate up and down, characterized in that: The valve core assembly comprises a movable joint (7) and a connecting member (4) buckled to the bottom of the movable joint (7), and the movable joint (7) is fixedly connected to the output end of the driving member (2); An outer core (5) is fixedly arranged inside the connecting member (4), the outer core (5) is in a tubular structure and an inner core (6) is arranged inside the outer core (5), the top of the inner core (6) is fixedly connected to the connecting member (4), a gap exists between the outer wall of the inner core (6) and the inner wall of the outer core (5), and an air blowing port (41) is opened on the connecting member (4), and the air blowing port (41) is located above the top surface of the outer core (5); The valve body (1) is provided with a valve cavity (15) and a fluid channel (11) communicating with the valve cavity (15); the valve nozzle (16) is provided with a discharge port (161) communicating with the valve cavity (15); a flow guide (12) is fixedly provided on the valve body (1), and the flow guide (12) comprises a first flow channel (13) and a second flow channel (14) respectively communicating with the fluid channel (11) and the valve cavity (15); The outer core (5) comprises a valve tube (52) and a valve head (51) for closing the discharge port (161) or the fluid channel (11); the valve head (51) is located in the valve cavity (15).

2. A filling valve according to claim 1, characterized in that: The valve body (1) comprises an upper valve body (17) and a lower valve body (3); a directional member (8) is provided inside the upper valve body (17); an internal thread is provided at the bottom of the upper valve body (17); and the upper valve body (17) is threadedly connected to the directional member (8) and the lower valve body (3), respectively.

3. A filling valve according to claim 2, characterized in that: The lower valve body (3) is provided with an assembly cavity (18) located above the fluid channel (11), and a guide sleeve (10) and an oil seal (9) are provided in the assembly cavity (18) from top to bottom, and the valve tube (52) passes through the directional member (8), the guide sleeve (10) and the oil seal (9) respectively.

4. A filling valve according to claim 2, characterized in that: The valve head (51) includes a sealing ring (53) for contacting the upper valve body (17); the valve head (51) is a component with upper and lower parts both being conical in shape; a sealing connector (19) is provided between the valve mouth (16) and the valve body (1); the sealing connector (19) is provided with a conical channel for fitting against the lower surface of the valve head (51); the conical channel is connected to the valve cavity (15) and the discharge port (161), respectively.

5. A filling valve according to claim 4, characterized in that: A stepped surface (191) is provided in the conical channel on the sealing connector (19), and the side walls on the upper and lower sides of the stepped surface (191) are respectively a clearance surface (192) and a sealing surface (193) for fitting with the lower surface of the valve head (51).

6. A filling valve according to claim 1, characterized in that: A fixing member (20) is fixedly arranged at the top end of the inner core (6), and the fixing member (20) is in contact with the inner wall of the connecting member (4) and the movable joint (7) respectively, and a telescopic spring is arranged between the bottom surface of the fixing member (20) and the top surface of the outer core (5).

7. A filling valve according to claim 2, characterized in that: The valve body (1) comprises an orientation ring, which is arranged on the outer surface of the valve body (1), and the side wall of the upper valve body (17) is provided with a reserved opening for passing an air pipe to connect to the air injection port (41).

8. A filling valve according to claim 1, characterized in that: The inner core (6) comprises a trumpet-shaped bottom, and the inner wall of the bottom of the outer core (5) is provided with a chamfer that can fit with the inclined surface of the bottom of the inner core (6).

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