Plunger type filling valve and filling device

Abstract

The utility model relates to the technical field of filling devices, and particularly provides a plunger type filling valve and a filling device. The plunger type filling valve comprises a piston cylinder, a piston and a rotary valve. The piston cylinder is provided with a first end and a second end deviating from each other; the piston enters and exits the piston cylinder through the first end of the piston cylinder; the rotary valve is arranged at the second end of the piston cylinder and comprises a valve body, a rotary valve element and a first air cylinder. The valve body is provided with a valve element cavity, a first through hole, a second through hole and a third through hole which are all communicated with the valve element cavity are formed in the outer wall of the valve body, and the first through hole is connected with the piston cylinder. The rotary valve element is in a cone shape or a circular truncated cone shape and is rotatably installed in the valve element cavity, and the rotary valve element rotates in the valve element cavity so that the first through hole can be communicated with the second through hole or the third through hole. The first air cylinder is connected with the end, with the large diameter, of the rotary valve element in the axial direction and can drive the rotary valve element to move in the axial direction so that part of the rotary valve element can be separated from the valve element cavity, and the first through hole, the second through hole and the third through hole can be communicated.

Description

Technical Field

[0001] The utility model relates to the technical field of filling devices, in particular to a plunger type filling valve and a filling device. Background Art

[0002] The plunger filling valve is a common filling device with simple control and easy operation, enabling efficient quantitative filling operations. In particular, the plunger filling valve is suitable for filling more viscous materials. After filling more viscous materials, the plunger filling valve needs to be cleaned.

[0003] like Figure 1 As shown, the plunger-type filling valve's piston cylinder 101 is connected to a piston 102 at one end and to a rotary valve 103 at the other. Through rotary valve 103, the plunger-type filling valve can communicate with external equipment such as feeding equipment and filling equipment. The valve body 104 and rotary valve core 105 of rotary valve 103 fit tightly together and are sealed by a seal 106. Rotating the rotary valve core 105 within the valve body 104 to different angles allows the piston cylinder 101 to communicate with different external equipment.

[0004] In the prior art, when the plunger filling valve is cleaned, the rotary valve 103 is connected to an external device to inject cleaning liquid into the piston cylinder 101, so as to clean the piston cylinder 101, the piston 102, the rotary valve 103 and the connected pipelines. There are sanitary blind spots in the part between the valve body 104 and the rotary valve core 105 of the rotary valve 103 and the contact parts between the seal 106 and the valve body 104 and the rotary valve core 105, which are difficult to be cleaned effectively. Utility Model Content

[0005] In response to the above problems, the present invention provides a plunger filling valve and a filling device, which can fully clean the internal structure of the plunger filling valve without any dead angles, while improving the overall cleaning effect and cleaning efficiency of the plunger filling valve and the filling device.

[0006] In the technical solution of the present invention, a plunger-type filling valve is provided, comprising a piston cylinder, a piston, and a rotary valve. The piston cylinder has a first end and a second end facing away from each other; the piston enters and exits the piston cylinder via the first end of the piston cylinder, and comprises a piston head and a piston rod, the outer periphery of the piston head abutting the inner wall of the piston cylinder, and the piston rod is connected to the piston head, driving the piston head to move within the piston cylinder. The rotary valve is disposed at the second end of the piston cylinder, and comprises a valve body, a rotary valve core, and a first cylinder. The valve body has a valve core cavity, and the outer wall of the valve body is provided with a first through hole, a second through hole, and a third through hole, each of which is connected to the valve core cavity, and the first through hole is connected to the piston cylinder; the rotary valve core is conical or frustum-shaped and is rotatably mounted within the valve core cavity. The rotary valve core rotates within the valve core cavity to connect the first through hole to the second through hole or the third through hole; the first cylinder is connected to the end of the rotary valve core with a larger diameter in the axial direction, and can drive the rotary valve core to move in the axial direction to partially disengage from the valve core cavity, thereby connecting the first through hole, the second through hole, and the third through hole.

[0007] According to the technical solution of the present invention, when the plunger-type filling valve is filling, the first through-hole of the rotary valve can be selectively connected to the second through-hole or the third through-hole by the rotation of the rotary valve core in the valve core cavity, so that the plunger-type filling valve can be selectively connected to the external device connected to the second through-hole or the third through-hole to perform feeding and filling operations. The rotary valve core and the valve core cavity of the rotary valve are tightly abutted to ensure the filling pressure of the plunger-type filling valve. When the cleaning liquid enters the rotary valve and piston cylinder of the plunger-type filling valve from the external device for cleaning, there is a cleaning dead angle at the abutment position between the rotary valve core and the valve core cavity. In this solution, the rotary valve core is driven by the first cylinder to move in the axial direction to partially detach from the valve core cavity, so that the cleaning liquid can directly contact the abutment position between the rotary valve core and the valve core cavity, realizing dead angle cleaning inside the rotary valve, thereby improving the cleaning effect and cleaning efficiency of the entire plunger-type filling valve.

[0008] Preferably, in the technical solution of the present invention, the end with a smaller diameter in the axial direction of the rotary valve core has a first opening portion, the second through hole is connected to the first opening portion, and the outer peripheral wall of the rotary valve core has a second opening portion and a third opening portion respectively connected to the first through hole, and a fourth opening portion connected to the third through hole; a first opening portion connecting tube and a second opening portion connecting tube are provided in the rotary valve core, the second opening portion connecting tube connects the first opening portion with the second opening portion, and the first opening portion connecting tube connects the third opening portion with the fourth opening.

[0009] According to the technical solution of the utility model, the rotary valve core in the rotary valve mates with the valve core cavity, filling the valve core cavity. Liquid circulation within the valve core cavity is achieved through the first opening communication tube and / or the second opening communication tube. When the first opening communication tube is open, the third opening and the fourth opening are connected, that is, the piston cylinder connected to the first through-hole is connected to the external device connected to the third through-hole. When the second opening communication tube is open, the first opening and the second opening are connected, that is, the piston cylinder connected to the first through-hole is connected to the external device connected to the second through-hole.

[0010] Preferably, in the technical solution of the present invention, the rotary valve further comprises a seal, a rotary valve shaft, and a second cylinder. The seal is disposed between the rotary valve core and the valve core cavity; the first cylinder is connected to the rotary valve core via the rotary valve shaft; and the second cylinder is connected to the rotary valve shaft, and the second cylinder drives the rotary valve core to rotate.

[0011] According to the technical solution of the utility model, by providing a seal between the rotary valve core and the valve core cavity, the sealing effect of the rotary valve rotation position can be improved, thereby ensuring the filling pressure of the plunger filling valve. The second cylinder drives the rotary valve core to rotate via the rotary valve shaft, realizing the switching of the first opening communication pipe and the second opening communication pipe inside the rotary valve.

[0012] Preferably, in the technical solution of the present invention, the piston cylinder includes a first section and a second section connected to each other, the inner diameter of the first section is larger than the inner diameter of the second section, the rotary valve is arranged in the second section of the piston cylinder, and the size of the piston matches the inner diameter of the second section.

[0013] According to the technical solution of the present utility model, when the plunger filling valve is cleaned, the piston can be moved along the length direction of the piston cylinder to the first section. The inner diameter of the first section is larger than the outer diameter of the piston. The cleaning liquid in the piston cylinder can be poured into the first section of the piston cylinder through the gap between the inner wall of the first section and the piston, so that the side surface of the piston and the end face close to the first section can be fully contacted with the cleaning liquid for cleaning, eliminating cleaning dead corners and improving the cleaning effect.

[0014] The present invention also provides a filling device comprising the aforementioned plunger-type filling valve, an on-off valve, a material cylinder, a first valve, a second valve, and a dummy cup. The on-off valve is connected to the second through hole; the material cylinder is connected to the third through hole; the first valve is connected to the on-off valve via a first pipeline; the second valve is connected to the first end of the piston cylinder via a second pipeline; and the on-off valve and the first pipeline are connected via the dummy cup.

[0015] According to the technical solution of the utility model, when the filling device is performing a filling operation, the first and third through holes of the rotary valve are connected, and the filling material enters the piston cylinder of the plunger-type filling valve from the material cylinder. The rotary valve switches to connect the first and second through holes, and the filling material in the piston cylinder can be pressed into the switch valve. When the filling device is performing a cleaning operation, the rotary valve core in the rotary valve moves partially in the axial direction to disengage the valve core cavity, so that the first, second, and third through holes are all connected. The cleaning liquid injected from the material cylinder can directly fill the rotary valve, piston cylinder, switch valve, and the pipelines connected thereto, fully immersing and cleaning the entire filling device. The cleaning liquid can then be discharged from the switch valve / piston cylinder through the first and second pipelines, respectively.

[0016] Preferably, in the technical solution of the present invention, the material cylinder includes a first feed port and a second feed port. The first feed port is equipped with a cleaning ball; and the feed rate of the second feed port is greater than that of the first feed port.

[0017] According to the technical solution of the utility model, when the filling device is being cleaned, cleaning liquid enters the material tank through the first feed port, slowly filling and soaking the filling device; cleaning liquid enters the material tank through the second feed port, quickly flushing the filling device. By combining different cleaning modes, the cleaning effect and efficiency are further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a plunger-type filling valve provided in the prior art.

[0019] Figure 2 It is a schematic diagram of a plunger-type filling valve provided in the first embodiment of the present utility model.

[0020] Figure 3 This is a schematic diagram of a piston cylinder and a piston provided in the first embodiment of the present utility model.

[0021] FIG4( a ) is a partially enlarged schematic diagram of the rotary valve provided in the first embodiment of the present invention.

[0022] FIG4( b ) is a partially enlarged schematic diagram of the rotary valve provided in the first embodiment of the present invention.

[0023] Figure 5 It is a schematic diagram of a filling device provided in the second embodiment of the present utility model.

[0024] Figure 6 This is a flow chart of a method for cleaning a plunger-type filling valve provided in the third embodiment of the present utility model.

[0025] Figure 7This is a cleaning schematic diagram of the first liquid inlet step provided in the third embodiment of the present utility model.

[0026] Figure 8 This is a cleaning schematic diagram of the second liquid inlet step provided in the third embodiment of the present utility model.

[0027] Explanation of the reference numerals: 101-piston cylinder, 102-piston, 103-rotary valve, 104-valve body, 105-rotary valve core, 106-seal, 1-plunger filling valve, 2-piston cylinder, 201-first end, 202-second end, 21-first section, 22-second section, 3-piston, 31-piston head, 32-piston rod, 4-rotary valve, 41-valve body, 410-valve core chamber, 411-first through hole, 412-second through hole, 413-third through hole, 42-rotary valve core, 421-first opening Mouth, 422-second opening, 423-third opening, 424-fourth opening, 425-first opening connecting pipe, 426-second opening connecting pipe, 43-first cylinder, 44-seal, 45-rotary valve shaft, 46-second cylinder, 100-filling device, 110-material cylinder, 111-first feed port, 112-second feed port, 120-switch valve, 130-first valve, 140-second valve, 150-dummy cup, 160-first pipeline, 170-second pipeline. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] [First embodiment]

[0030] Figure 2 It is a schematic diagram of a plunger-type filling valve provided in the first embodiment of the present utility model.

[0031] like Figure 2 As shown, in the first embodiment of the present invention, a plunger-type filling valve 1 is provided, which can be used to fill relatively viscous materials. The plunger-type filling valve 1 includes a piston cylinder 2, a piston 3, and a rotary valve 4. The piston 3 can move up and down along the length direction H of the piston cylinder 2 to fill the material.

[0032] Figure 3 It is a schematic diagram of a piston cylinder 2 and a piston 3 provided in the first embodiment of the present utility model.

[0033] like Figure 2 and Figure 3 As shown, in the first embodiment of the present invention, the piston cylinder 2 is generally cylindrical. When the plunger-type filling valve 1 is used for filling, the material is charged into the inner cavity of the piston cylinder 2. The piston cylinder 2 has a first end 201 and a second end 202 that are separated from each other. The piston 3 is disposed in the piston cylinder 2 and enters and exits the piston cylinder 2 through the first end 201 of the piston cylinder 2 to press the material out of the piston cylinder 2 for filling. The rotary valve 4 is disposed at the second end 202 of the piston cylinder 2.

[0034] The piston 3 includes a piston head 31 and a piston rod 32. The piston head 31 is in the shape of a thick cylinder, and its outer periphery abuts against the inner wall of the piston cylinder 2. The piston rod 32 is a thin rod fixedly connected to the piston head 31, and the piston rod 32 can drive the piston head 31 to move up and down in the piston cylinder 2.

[0035] FIG4 (a) and FIG4 (b) are partial enlarged schematic views of the rotary valve 4 provided in the first embodiment of the present invention.

[0036] refer to Figure 2 4(a) and 4(b), in the first embodiment of the present invention, the rotary valve 4 includes a valve body 41, a rotary valve core 42, and a first cylinder 43. The valve body 41 has a valve core cavity 410. The outer wall of the valve body 41 defines a first through-hole 411, a second through-hole 412, and a third through-hole 413, all of which are connected to the valve core cavity 410. The first through-hole 411 is connected to the second end 202 of the piston cylinder 2, and the second through-hole 412 and the third through-hole 413 are respectively used to connect different external devices to communicate with the piston cylinder 2.

[0037] The rotary valve core 42 is conical or frustoconical and is rotatably installed in the valve core cavity 410 . The rotary valve core 42 rotates in the valve core cavity 410 to connect the first through hole 411 to the second through hole 412 or the third through hole 413 .

[0038] In the first embodiment of the present invention, the outer periphery of the rotary valve core 42 includes a first opening 421, a second opening 422, a third opening 423, and a fourth opening 424. Inside, a first opening connecting tube 425 and a second opening connecting tube 426 are disposed. The second opening connecting tube 426 terminates at the first opening 421 and the second opening 422, respectively. The first opening connecting tube 425 terminates at the third opening 423 and the fourth opening 424, respectively. The rotary valve core 42 in the rotary valve 4 mates with and abuts the valve core cavity 410, filling the cavity. Liquid flow within the rotary valve core 42 is achieved through the first opening connecting tube 425 and / or the second opening connecting tube 426.

[0039] Specifically, referring to FIG4( a ), the first opening 421 is provided at the end of the rotary valve core 42 with the smaller diameter in the axial direction L. When the rotary valve core 42 is in abutment with the valve body 41, the first opening 421 communicates with the second through-hole 412 of the valve body 41. The second opening 422, the third opening 423, and the fourth opening 424 are all provided on the outer side surface of the rotary valve core 42, i.e., the side surface of the cone or frustum. When the first opening 421 is in communication with the second through-hole 412 of the valve body 41, the second opening 422 can communicate with the first through-hole 411, thereby allowing the second opening communication pipe 426 within the rotary valve core 42 to be in communication, i.e., the piston cylinder 2 is in communication with the external device provided in the second through-hole 412.

[0040] Referring to Figure 4(b), the angle between the third opening portion 423 and the fourth opening portion 424 relative to the axial direction L is 180°. When the rotary valve core 42 rotates to connect the third opening portion 423 with the first through hole 411, the fourth opening portion 424 is connected with the third through hole 413, so that the first opening portion connecting pipe 425 inside the rotary valve core 42 is connected, that is, the piston cylinder 2 is connected with the external equipment arranged in the third through hole 413.

[0041] The first cylinder 43 is connected to the end with a larger diameter in the axial direction L of the rotary valve core 42, and can drive the rotary valve core 42 to move along the axial direction L to partially separate from the valve core cavity 410. Through the gap between the outer wall of the rotary valve core 42 and the inner wall of the valve core cavity 410, the first through hole 411 can be connected to the second through hole 412 and the third through hole 413 at the same time.

[0042] In the first embodiment of the present invention, the rotary valve 4 further includes a seal 44, a rotary valve shaft 45, and a second cylinder 46. The seal 44 is disposed between the rotary valve core 42 and the valve core cavity 410, preventing the filling material from escaping through the gap between the rotary valve core 42 and the valve core cavity 410. This improves the airtightness of the rotary valve 4 and ensures the filling pressure of the plunger-type filling valve 1. The first cylinder 43 and the second cylinder 46 are both connected to the rotary valve core 42 via the rotary valve shaft 45. The second cylinder 46 drives the rotary valve core 42 to rotate in the axial direction L, switching the flow between the first opening connecting pipe 425 and the second opening connecting pipe 426 within the rotary valve 4.

[0043] It is worth mentioning that in other embodiments of the present invention, the movement and rotation of the rotary valve core 42 can also be achieved by other moving devices such as guide rails, which is not limited here.

[0044] In the first embodiment of the present invention, when the plunger-type filling valve 1 is filling, the first through hole 411 of the rotary valve 4 can selectively connect to the second through hole 412 or the third through hole 413 through the rotation of the rotary valve core 42 in the valve core chamber 410, so that the piston cylinder 2 of the plunger-type filling valve 1 is selectively connected to the external device connected to the second through hole 412 or the third through hole 413 to perform feeding and filling operations. Among them, the rotary valve core 42 of the rotary valve 4 and the valve core chamber 410 are tightly abutted to ensure the filling pressure of the plunger-type filling valve 1. When the plunger-type filling valve 1 is cleaned, the cleaning liquid enters the rotary valve 4 and piston cylinder 2 of the plunger-type filling valve 1 from the external device, and a cleaning dead angle exists at the abutment position between the rotary valve core 42 and the valve core chamber 410. In this embodiment, the first cylinder 43 drives the rotary valve core 42 to move along the axial direction L to partially disengage from the valve core cavity 410, so that the cleaning liquid can directly enter and contact the abutment position of the rotary valve core 42 and the valve core cavity 410 during filling, thereby achieving dead-angle cleaning inside the rotary valve 4, thereby improving the cleaning effect and cleaning efficiency of the entire plunger filling valve 1.

[0045] Preferably, in the first embodiment of the present invention, the piston cylinder 2 includes a first section 21 and a second section 22 that are connected, and the inner diameter D1 of the first section 21 is greater than the inner diameter D2 of the second section 22 .

[0046] In this embodiment, the piston 3 is disposed in the piston cylinder 2 and is used to press the material out of the piston cylinder 2 for filling. The outer diameter of the piston 3 matches the inner diameter D2 of the second section 22 of the piston cylinder 2. In other words, the outer diameter of the piston 3 is slightly smaller than the inner diameter D2 of the second section 22 of the piston cylinder 2, so that the gap between the piston 3 and the piston cylinder 2 is as small as possible to ensure the filling pressure when the piston 3 is pressed down. The piston 3 includes a piston head 31 and a piston rod 32. The piston head 31 is in the shape of a thick cylinder, and the outer diameter of the piston head 31 matches the inner diameter D2 of the second section 22. The piston rod 32 is a thin rod fixedly connected to the piston head 31. During the filling operation, the piston rod 32 can drive the piston head 31 to move up and down in the piston cylinder 2. During the cleaning operation, the piston rod 32 can drive the piston head 31 to move to the first section 21 of the piston cylinder 2. The inner diameter D1 of the first section 21 is larger than the inner diameter D2 of the second section 22, that is, the inner diameter D1 of the first section 21 is larger than the outer diameter of the piston 3. The cleaning liquid in the piston cylinder 2 can be poured into the first section 21 of the piston cylinder 2 through the gap between the inner wall of the first section 21 and the piston head 31, so that the side surface of the piston 3 and the end face close to the first section 21 can be fully contacted with the cleaning liquid for cleaning.

[0047] In the first embodiment of the present invention, the plunger-type filling valve 1 can be cleaned directly in situ without disassembly, effectively cleaning traditional blind spots in the plunger-type filling valve 1, such as the abutment between the rotary valve core 42 and the valve body 41, the seal 44, etc., thereby improving the cleaning effect. Moreover, the overall plunger-type filling valve 1 has a simple structure and is easy to clean, which can effectively save cleaning time and improve cleaning efficiency.

[0048] [Second embodiment]

[0049] Figure 5 It is a schematic diagram of a filling device provided in the second embodiment of the present utility model.

[0050] like Figure 5 As shown, in the second embodiment of the present invention, a filling device 100 is also provided, including the plunger filling valve 1 in the first embodiment and a material cylinder 110, a switch valve 120, a first valve 130, a second valve 140, a dummy cup 150, a first pipeline 160 and a second pipeline 170.

[0051] In the second embodiment of the present invention, the material cylinder 110 is connected to the plunger filling valve 1 through the third through hole 413 of the rotary valve 4, and is used to store and transport filling materials. When the first opening connecting pipe 425 of the rotary valve 4 is connected, the filling material in the material cylinder 110 can enter the piston cylinder 2.

[0052] Preferably, in the second embodiment of the present invention, the material cylinder 110 includes a first feed port 111 and a second feed port 112. The first feed port 111 is equipped with a cleaning ball; the feed rate of the second feed port 112 is greater than the feed rate of the first feed port 111. When the filling device 100 is cleaning, cleaning liquid can enter the material cylinder 110 through the first feed port 111, slowly filling and soaking the various devices and pipelines within the filling device 100; cleaning liquid can also enter the material cylinder 110 through the second feed port 112, quickly flushing the various devices and pipelines within the filling device 100. By combining different cleaning modes, the cleaning effect and efficiency are further improved.

[0053] In the second embodiment of the present invention, the inlet of the on-off valve 120 communicates with the plunger-type filling valve 1 via the second through-hole 412 of the rotary valve 4. When the second opening of the rotary valve 4, connected to the pipe 426, is open, the filling material within the piston cylinder 2 can be pressed into the on-off valve 120. The outlet of the on-off valve 120 can be connected to the product to be filled, thereby pressing the filling material into the product to complete the filling operation. The outlet of the on-off valve 120 can also be connected to a liquid outlet pipeline to discharge the filling material / cleaning liquid out of the filling device 100.

[0054] In this embodiment, the first valve 130 is connected to the on-off valve 120 via a first pipeline 160 and can be used to introduce and discharge materials into and out of the on-off valve 120. Preferably, the on-off valve 120 and the first pipeline 160 are connected via a dummy cup 150 to seal the valve opening of the on-off valve 120. Similarly, the second valve 140 is connected to the first end 201 of the piston cylinder 2 via a second pipeline 170 and can be used to introduce and discharge materials into and out of the piston cylinder 2.

[0055] During the filling operation of the filling device 100, the first opening of the connecting pipe 425 of the rotary valve 4 in the plunger-type filling valve 1 is open, and the filling material enters the piston cylinder 2 from the material cylinder 110, completing the filling of the piston cylinder 2. Then, the rotary valve 4 switches to open the second opening of the connecting pipe 426, and the piston 3 presses the filling material in the piston cylinder 2 into the on-off valve 120, completing the filling operation.

[0056] When the filling device 100 is performing a cleaning operation, the rotary valve core 42 in the rotary valve 4 moves along the axial direction L so that the rotary valve core 42 partially detaches from the valve core cavity 410, so that the first through hole 411, the second through hole 412 and the third through hole 413 in the rotary valve 4 are simultaneously connected. The flow direction of the cleaning liquid is shown by the dotted arrow. The cleaning liquid injected by the material cylinder 110 can directly fill the rotary valve 4, the piston cylinder 2 and the switch valve 120 and the connected pipelines, namely the first pipeline 160 and the second pipeline 170, to fully soak and clean the entire filling device 100. Finally, the cleaning liquid can be discharged from the switch valve 120 / piston cylinder 2 through the first pipeline 160 and the second pipeline 170 respectively.

[0057] [Third embodiment]

[0058] Figure 6 This is a flow chart of a method for cleaning a plunger-type filling valve provided in the third embodiment of the present utility model.

[0059] like Figure 6 As shown, in the third embodiment of the present invention, a method for cleaning the filling device 100 is also provided, which is applied to the filling device 100 described in the second embodiment.

[0060] In a third embodiment of the present utility model, the cleaning method of the filling device 100 includes: a connecting step S1, installing the dummy cup 150, connecting the switch valve 120 with the first pipeline 160, and opening the switch valve 120, moving the piston 3, connecting the second pipeline 170 with the first end 201 of the piston cylinder 2, and the first cylinder 43 drives the rotary valve core 42 to separate from the valve core chamber 410; a liquid feeding step S2, closing the first valve 130 and the second valve 140, injecting the cleaning liquid into the material cylinder 110, and filling the switch valve 120 and the piston cylinder 2 through the rotary valve 4; a liquid discharging step S3, opening the first valve 130 and / or the second valve 140, injecting the cleaning liquid into the material cylinder 110, flowing to the switch valve 120 and / or the piston cylinder 2 through the rotary valve 4, and being discharged from the first valve 130 and / or the second valve 140.

[0061] In this embodiment, first, through the connection step S1, the switch valve 120 is connected to the first valve 130 through the first pipeline 160; the piston cylinder 2 is connected to the second valve 140 through the second pipeline 170; and the first cylinder 43 drives the rotary valve core 42 to disengage from the valve core chamber 410, so that the first through hole 411, the second through hole 412 and the third through hole 413 of the rotary valve 4 are all connected at the same time, so that any two of the piston cylinder 2, the material cylinder 110 and the switch valve 120 can be connected.

[0062] In the liquid feeding step S2, the cleaning liquid is injected from the first feeding port 111 of the material cylinder 110. The cleaning liquid can directly fill the rotary valve 4, the piston cylinder 2, the switch valve 120 and the various pipelines connected thereto, and fully soak and clean the entire filling device 100.

[0063] In draining step S3, cleaning liquid is injected through second feed port 112 of cylinder 110. At this point, the liquid from step S2 still remains in rotary valve 4, piston cylinder 2, on-off valve 120, and their interconnected pipelines within filling device 100. This cleaning liquid can quickly flush these components, including rotary valve 4, piston cylinder 2, on-off valve 120, and their interconnected pipelines within filling device 100. Simultaneously, the cleaning liquid in on-off valve 120 is drained through first valve 130 connected to first pipeline 160, and / or the cleaning liquid in piston cylinder 2 is drained through second valve 140 connected to second pipeline 170.

[0064] In this embodiment, through the above-mentioned cleaning method, any two of the piston cylinder 2, the material cylinder 110, and the switch valve 120 can be connected through the connecting step S1; thus, when the filling device 100 is cleaned, the flow direction and flow speed of the cleaning liquid between the piston cylinder 2, the material cylinder 110, and the switch valve 120 can be flexibly adjusted, and the cleaning liquid flushes the rotary valve 4, the piston cylinder 2 and the switch valve 120 inside the filling device 100 and the various pipes connected thereto in different directions and angles to further improve the cleaning effect.

[0065] Figure 7 This is a schematic diagram of a cleaning liquid flow path in the first liquid inlet step S4 provided in the third embodiment of the present invention.

[0066] refer to Figure 7 In the third embodiment of the present invention, the cleaning method of the filling device 100 further includes a first liquid injection step S4, in which the first valve 130 and the second valve 140 are opened, and the cleaning liquid is injected into the first valve 130, passes through the switch valve 120, the rotary valve 4, and the piston cylinder 2 in sequence, and is discharged from the second valve 140. The flow direction of the cleaning liquid is indicated by the dotted arrow.

[0067] In this embodiment, the liquid discharge step S3 and the first liquid intake step S4 can be performed alternately or simultaneously, and the second valve 140 is used as the discharge port of the cleaning liquid. The cleaning liquid enters through the material cylinder 110 and the first valve 130 and is discharged through the second valve 140.

[0068] Figure 8 This is a schematic diagram of a cleaning liquid flow path in the second liquid inlet step S5 provided in the third embodiment of the present invention.

[0069] refer to Figure 8 In the third embodiment of the present invention, the cleaning method of the filling device 100 further includes a second liquid injection step S5, in which the first valve 130 and the second valve 140 are opened, and the cleaning liquid is injected into the second valve 140, passes through the piston cylinder 2, the rotary valve 4, and the switch valve 120 in sequence, and is discharged from the first valve 130. The flow direction of the cleaning liquid is indicated by the dotted arrow.

[0070] In this embodiment, the liquid discharge step S3 and the second liquid intake step S5 can be performed alternately or simultaneously, and the first valve 130 is used as the discharge port of the cleaning liquid. The cleaning liquid enters from the material cylinder 110 and the second valve 140 and is discharged from the first valve 130.

[0071] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A plunger filling valve, characterized in that: include a piston cylinder having a first end and a second end facing away from each other; a piston, which enters and exits the piston cylinder via the first end of the piston cylinder, and includes a piston head and a piston rod, wherein the outer periphery of the piston head abuts against the inner wall of the piston cylinder, and the piston rod is connected to the piston head to drive the piston head to move within the piston cylinder; a rotary valve, disposed at the second end of the piston cylinder, the rotary valve comprising: The valve body has a valve core cavity, and the outer wall of the valve body is provided with a first through hole, a second through hole and a third through hole, all of which are connected to the valve core cavity, and the first through hole is connected to the piston cylinder; a rotary valve core, the rotary valve core being in a conical or frustoconical shape and being rotatably mounted in the valve core cavity, wherein the rotary valve core rotates in the valve core cavity to connect the first through hole to the second through hole or the third through hole; The first cylinder is connected to the end with a larger diameter in the axial direction of the rotary valve core, and can drive the rotary valve core to move in the axial direction to partially separate from the valve core cavity, so that the first through hole, the second through hole and the third through hole are connected.

2. The plunger filling valve according to claim 1, characterized in that: The rotary valve core has a first opening at one end with a smaller diameter in the axial direction, the second through hole is connected to the first opening, and the outer peripheral wall of the rotary valve core has a second opening and a third opening respectively connected to the first through hole, and a fourth opening connected to the third through hole; A first opening communicating tube and a second opening communicating tube are provided in the rotary valve core. The second opening communicating tube connects the first opening with the second opening, and the first opening communicating tube connects the third opening with the fourth opening.

3. The plunger filling valve according to claim 1, characterized in that: The rotary valve further comprises: a sealing member, disposed between the rotary valve core and the valve body; a rotary valve shaft, wherein the first cylinder is connected to the rotary valve core via the rotary valve shaft; The second cylinder is connected to the rotary valve shaft, and the second cylinder drives the rotary valve core to rotate.

4. The plunger filling valve according to claim 1, characterized in that: The piston cylinder includes a first section and a second section connected to each other. The inner diameter of the first section is larger than the inner diameter of the second section. The rotary valve is arranged in the second section of the piston cylinder. The size of the piston matches the inner diameter of the second section.

5. A filling device, characterized in that: The filling device comprises the plunger-type filling valve according to any one of claims 1 to 4, and further comprises: an on-off valve, connected to the second through hole; a material cylinder, connected to the third through hole; a first valve, connected to the switch valve through a first pipeline; a second valve, connected to the first end of the piston cylinder through a second pipeline; A dummy cup, the switch valve and the first pipeline are communicated through the dummy cup.

6. The filling device according to claim 5, characterized in that: The material cylinder comprises: The first feed port is equipped with a cleaning ball; A second feed port, wherein a feed rate of the second feed port is greater than a feed rate of the first feed port.

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