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 an 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 communicated with the valve element cavity are formed in the outer wall of the valve body, the first through hole is connected with the piston cylinder, the second through hole is connected with an external material cylinder, and the third through hole is connected with an external outlet; the rotary valve element is rotatably mounted in the valve element cavity, and the first through hole is communicated with the second through hole or the third through hole through rotation; 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 the rotary valve element can be partially separated from the valve element cavity, and the first through hole, the second through hole and the third through hole can be communicated. The lifting device is in sliding connection with the piston.

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 the external material cylinder to pour the 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 blind spots in the cleaning of the part between the valve body 104 and the rotary valve core 105 of the rotary valve 103 and the contact part between the seal 106 and the valve body 104 and the rotary valve core 105, which makes it difficult to clean 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 that are opposite to each other; the piston enters and exits the piston cylinder via the first end of the piston cylinder; the rotary valve is arranged at the second end of the piston cylinder, and the rotary valve comprises a valve body, a rotary valve core and a 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 that are all connected to the valve core cavity, the first through hole is connected to the piston cylinder, the second through hole is connected to the external material cylinder, and the third through hole is connected to the external outlet; the rotary valve core is conical or frustum-shaped and is rotatably installed in the valve core cavity. 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 the 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 detach from the valve core cavity, so that the first through hole, the second through hole and the third through hole are connected; the lifting device is slidably connected to the piston.

[0007] According to the technical solution of the present invention, by rotating the rotary valve core in the valve core cavity, the first through hole of the rotary valve can be selectively connected to the second through hole or the third through hole, so that the plunger filling valve can be selectively connected to the external material cylinder connected to the second through hole or the external outlet connected to the third through hole to perform feeding and filling actions or cleaning actions. The rotary valve core and the valve core cavity of the rotary valve are tightly abutted to ensure the filling pressure of the plunger filling valve. When the cleaning liquid enters the rotary valve and piston cylinder of the plunger filling valve from the external material cylinder 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 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] In the technical solution of the present invention, a filling device is also provided, comprising the above-mentioned plunger filling valve and a material cylinder, wherein a plurality of plunger filling valves are arranged around the outside of the material cylinder.

[0015] According to the technical solution of the utility model, the plunger-type filling valve in the filling device can be conveniently cleaned on site, which effectively improves the cleaning effect, saves cleaning time, and thus improves the cleaning efficiency of the filling device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of a plunger-type filling valve provided in the prior art.

[0017] Figure 2It is a schematic diagram of a plunger-type filling valve provided in an embodiment of the present utility model.

[0018] Figure 3 It is a schematic diagram of a piston cylinder and a piston provided in an embodiment of the present utility model.

[0019] Figure 4 It is a partially enlarged schematic diagram of the rotary valve provided in the embodiment of the present utility model.

[0020] Figure 5 It is a partially enlarged schematic diagram of the rotary valve provided in the embodiment of the present utility model.

[0021] Figure 6 It is a schematic diagram of a filling device provided in an embodiment of the present utility model.

[0022] 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-second section A through hole, 412-a second through hole, 413-a third through hole, 42-a rotary valve core, 421-a first opening, 422-a second opening, 423-a third opening, 424-a fourth opening, 425-a connecting pipe to the first opening, 426-a connecting pipe to the second opening, 43-a first cylinder, 44-a sealing element, 45-a rotary valve shaft, 46-a second cylinder, 100-a filling device, 200-a material cylinder. DETAILED DESCRIPTION

[0023] 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.

[0024] Figure 2 It is a schematic diagram of a plunger-type filling valve provided in an embodiment of the present utility model.

[0025] like Figure 2 As shown, in this embodiment, a plunger-type filling valve 1 is provided, which can be used for filling 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.

[0026] Figure 3 It is a schematic diagram of a piston cylinder 2 and a piston 3 provided in an embodiment of the present utility model.

[0027] like Figure 2 and Figure 3 As shown, in the 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.

[0028] 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.

[0029] Figure 4 and Figure 5 It is a partially enlarged schematic diagram of the rotary valve 4 provided in the embodiment of the present utility model.

[0030] refer to Figure 2 、 Figure 4 and Figure 5 In an 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, the second through-hole 412 is connected to the external cylinder 200, and the third through-hole 413 is connected to the external outlet. The rotary valve core 42 is conical or frustum-shaped and is rotatably mounted within the valve core cavity 410. The rotary valve core 42 rotates within the valve core cavity 410, connecting the first through-hole 411 to the second through-hole 412 or the third through-hole 413.

[0031] In this 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 has the first opening 421 and the second opening 422 at its ends, respectively, while the first opening connecting tube 425 has the third opening 423 and the fourth opening 424 at its ends. 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.

[0032] Specifically, refer to Figure 4 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 cylinder 200 provided in the second through-hole 412.

[0033] refer to Figure 5 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 and the third opening portion 423 is connected to the first through hole 411, the fourth opening portion 424 is connected to 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 to the external outlet set in the third through hole 413.

[0034] 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.

[0035] In this embodiment, the piston cylinder 2 of the plunger-type filling valve 1 is connected to the material cylinder 200 via a rotary valve 4. A liquid inlet (not shown) of the piston cylinder 2 is provided at the second end 202 of the piston cylinder 2. Filling material and / or cleaning liquid can flow into or be discharged from the piston cylinder 2 of the plunger-type filling valve 1 via the rotary valve 4.

[0036] For example, rotating the valve core 42 can connect the first through hole 411 with the second through hole 412, so that the piston cylinder 2 is connected with the material cylinder 200, and the material or cleaning liquid in the material cylinder 200 can enter the piston cylinder 2 through the second through hole 412, the first through hole 411 and the liquid inlet not shown; or rotating the valve core 42 can connect the first through hole 411 with the third through hole 413, so that the piston cylinder 2 is connected with the outlet, and the material or cleaning liquid in the piston cylinder 2 can be discharged from the piston cylinder 2 through the first through hole 411 and the third through hole 413.

[0037] In this 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 positioned between the rotary valve core 42 and the valve core cavity 410 to prevent the filling material from escaping through the gap between the rotary valve core 42 and the valve core cavity 410, thereby improving the airtightness of the rotary valve 4 and ensuring 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.

[0038] 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.

[0039] refer to Figure 6 In this embodiment, the plunger filling valve 1 further includes a lifting device 6, which is arranged outside the cylinder 200 along the height direction, i.e., the length direction H of the piston cylinder 2, and the piston rod 32 of the piston 3 is slidably connected to the lifting device 6.

[0040] Specifically, in this embodiment, the lifting device 6 is configured as a slide rail structure, and the slide rail 61 is arranged around the outside of the material cylinder 200 along the height direction. The piston rod 32 is connected to the pulley 62, and the pulley 62 slides along the slide rail 61 to drive the piston rod 32 to move up and down along the slide rail, and drives the piston 3 to move up and down along the height direction, that is, the length direction H of the piston cylinder 2.

[0041] During the filling operation, the lifting device 6 can drive the piston 3 downward to press the material in the piston cylinder 2 to perform the filling operation; during the cleaning operation, the lifting device 6 can drive the piston 3 to rise and fall in the piston cylinder 2. In other embodiments of the present invention, the lifting device 6 can also be a lifting mechanism of different forms such as a cylinder, a screw rod, or a motor drive, which is not limited here.

[0042] refer to Figure 3 Preferably, in this embodiment, the piston cylinder 2 includes a first section 21 and a second section 22 that are connected, and an inner diameter D1 of the first section 21 is larger than an inner diameter D2 of the second section 22 .

[0043] 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.

[0044] In this embodiment, when the plunger-type filling valve 1 is cleaned on-site, the second through hole 412 of the rotary valve 4 is connected to the material cylinder 200 , and the material cylinder 200 is filled with cleaning liquid.

[0045] First, adjust the rotary valve core 42 of the rotary valve 4 to connect the first through-hole 411 with the second through-hole 412, thereby connecting the piston cylinder 2 with the material cylinder 200. The piston 3 is then controlled to rise to the top of the second section 22. The cleaning liquid in the material cylinder 200 enters the piston cylinder 2 through the second through-hole 412, the first through-hole 411, and the liquid inlet at the bottom of the piston cylinder 2 connected to the first through-hole 411. At this point, due to the configuration of the seal 4, the cleaning liquid only fills the second section 22 of the piston cylinder 2, flushing and cleaning the second section 22 of the piston cylinder 2 and the end surface of the piston head 31 facing the rotary valve 4.

[0046] Then, the rotary valve core 42 of the rotary valve 4 is adjusted to connect the first through hole 411 with the third through hole 413, and the piston 3 is controlled to descend. The cleaning liquid that has cleaned the second section 22 in the piston cylinder 2 can be completely discharged from the piston cylinder 2 through the liquid inlet at the bottom of the piston cylinder 2, and then discharged through the first through hole 411, the third through hole 413 and the external outlet connected to the third through hole 413.

[0047] Next, adjust the rotary valve core 42 of the rotary valve 4 again to connect the first through hole 411 with the second through hole 412, control the piston 3 to rise so that the piston head 31 enters the first section 21, and the new cleaning liquid in the material cylinder 200 enters the piston cylinder 2 from the liquid inlet at the bottom of the piston cylinder 2. The cleaning liquid fills the second section 22 of the piston cylinder 2 and is 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 cleaning liquid can immerse the entire piston head 31, and the sides of the first section 21 and the piston head 31 can be fully in contact with the cleaning liquid for cleaning.

[0048] The cleaning liquid after cleaning can flow out through the gap between the inner wall of the first section 21 and the piston head 31, and by adjusting the rotary valve core 42 of the rotary valve 4 to connect the first through hole 411 with the third through hole 413, the piston 3 is controlled to descend, and the cleaning liquid that has cleaned the first section 21 and the side of the piston head 31 in the piston cylinder 2 can be completely discharged from the piston cylinder 2 through the liquid inlet at the bottom of the piston cylinder 2, and then discharged through the first through hole 411, the third through hole 413 and the external outlet connected to the third through hole 413.

[0049] Furthermore, since the rotary valve core 42 of the rotary valve 4 needs to be in close contact with the valve core cavity 410 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 the piston cylinder 2 of the plunger-type filling valve 1 from the material cylinder 200, and a cleaning dead angle exists at the abutment position between the rotary valve core 42 and the valve core cavity 410. In this embodiment, the rotary valve core 42 is driven by the first air cylinder 43 to move along the axial direction L to partially disengage 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 cleaning liquid injected by the material cylinder 200 can directly enter and contact the abutment position between the rotary valve core 42 and the valve core cavity 410 during filling, thereby achieving cleaning of the interior of the rotary valve 4 without dead angles. In addition, the cleaning liquid can enter the piston cylinder 2 through the first through hole 411 to clean the sides of the first section 21, the second section 22 and the piston head 31. The cleaned liquid can flow out through the gap between the inner wall of the first section 21 and the piston head 31 and be discharged through the external outlet connected to the third through hole 413.

[0050] In the embodiment of the present utility model, 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.

[0051] Figure 6 It is a schematic diagram of a filling device provided in an embodiment of the present utility model.

[0052] like Figure 6 As shown, in this embodiment, a filling device 100 is further provided, comprising a material cylinder 200 and a plurality of plunger-type filling valves 1, wherein the plurality of plunger-type filling valves 1 are arranged around the outer surface of the material cylinder 200. Specifically, a slide rail 61 in the lifting device 6 is arranged around the outer side of the material cylinder 200 along the height direction H, and the piston rods 32 of the plurality of plunger-type filling valves 1 are respectively connected to a plurality of pulleys 62 slidably arranged in the slide rail 61 in a one-to-one correspondence.

[0053] When the filling device 100 is running, the material cylinder 200 can rotate along its circumferential direction, thereby driving the multiple plunger-type filling valves 1 outside the material cylinder 200 to rotate, and the pulley 62 slides along the slide rail 61 to drive the piston rod 32 to move up and down along the slide rail.

[0054] Furthermore, when the filling device 100 is performing a filling operation, the first opening connecting pipe 425 of the rotary valve 4 of the plunger-type filling valve 1 is connected, and the filling material enters the piston cylinder 2 from the material cylinder 200, completing the material filling of the piston cylinder 2. Then, the second cylinder 46 controls the switching of the rotary valve 4 to connect the second opening connecting pipe 426, and the lifting device 6 drives the piston 3 downward to press the filling material out of the piston cylinder 2 and discharge it from the outlet, thereby performing the filling operation. When the filling device 100 is performing a cleaning operation, the lifting device 6 can drive the piston 3 to rise and fall in the piston cylinder 2 to perform corresponding contact cleaning or discharge the cleaning liquid. The plunger-type filling valve 1 in the filling device 100 can be conveniently cleaned on site, effectively improving the cleaning effect, saving cleaning time, and improving the cleaning efficiency of the filling device 100.

[0055] 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, moving into and out of the piston cylinder via the first end of 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, the first through hole is connected to the piston cylinder, the second through hole is connected to the external cylinder, and the third through hole is connected to the external outlet; 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; a first cylinder connected to an end of the rotary valve core with a larger diameter in the axial direction, capable of driving the rotary valve core to move in the axial direction to partially separate from the valve core cavity, thereby connecting the first through hole, the second through hole, and the third through hole; A lifting device is slidably connected to the piston.

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 a material cylinder, wherein a plurality of the plunger-type filling valves are arranged around the outside of the material cylinder.

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