Plunger type filling valve, filling device and cleaning method

Abstract

The invention relates to the technical field of filling devices, and particularly provides a plunger type filling valve, a filling device and a cleaning method of the 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 invention relates to the technical field of filling devices, in particular to a plunger type filling valve, a filling device and a cleaning method of the filling device. Background Art

[0002] The plunger filling valve is a common filling equipment, which is simple to control and easy to operate, and can achieve 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, one end of the piston cylinder 101 of the plunger filling valve is connected to the piston 102, and the other end is connected to the rotary valve 103. The plunger filling valve can be connected to external equipment such as feeding equipment and filling equipment through the rotary valve 103. The valve body 104 and the rotary valve core 105 of the rotary valve 103 are tightly matched and sealed by a seal 106. When the rotary valve core 105 rotates to different angles in the valve body 104, the piston cylinder 101 can be connected to 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 dead angles in the part between the valve body 104 and the rotary valve core 105 of the rotary valve 103 and the abutting part between the sealing member 106 and the valve body 104 and the rotary valve core 105, which are difficult to be cleaned effectively. Summary of the invention

[0005] In response to the above problems, the present invention provides a plunger filling valve, a filling device and a cleaning method for the filling device, which can fully clean the internal structure of the plunger filling valve without 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, including 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 includes 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 that are all connected to the valve core cavity, and the first through hole is connected to the piston cylinder; the rotary valve core is conical or truncated cone-shaped, and is rotatably installed in the valve core cavity. The rotary valve core rotates in the valve core cavity so that the first through hole is connected 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 detach from the valve core cavity, so that the first through hole, the second through hole and the third through hole are connected.

[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 through the rotation of the rotary valve core in the valve core cavity, so that the plunger-type filling valve is selectively connected to the external device connected to the second through hole or the third through hole to perform feeding and filling 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-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 the cleaning of the inside of the rotary valve without dead angles, 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, 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 portion.

[0009] According to the technical solution of the present invention, the rotary valve core in the rotary valve is matched and abutted with the valve core cavity, and the valve core cavity can be filled, and the liquid flow inside the valve core cavity is realized through the first opening portion connecting tube and / or the second opening portion connecting tube. When the first opening portion connecting tube is connected, the third opening portion is connected to the fourth opening portion, 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 portion connecting tube is connected, the first opening portion and the second opening portion 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 sealing member, a rotary valve shaft and a second cylinder. The sealing member is arranged 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; 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 present invention, by arranging a sealing member between the rotary valve core and the valve core cavity, the sealing effect of the rotary valve rotation position can be improved to ensure the filling pressure of the plunger filling valve. The second cylinder drives the rotary valve core to rotate through the rotary valve shaft to realize the conduction switching of the first opening part connecting pipe / the second opening part connecting 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, 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 invention, 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, and 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 surface close to the first section can be fully contacted with the cleaning liquid for cleaning, thereby 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 switch valve, a material cylinder, a first valve, a second valve and a dummy cup. The switch 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 switch valve through the first pipeline; the second valve is connected to the first end of the piston cylinder through the second pipeline; the switch valve and the first pipeline are connected through the dummy cup.

[0015] According to the technical solution of the present invention, when the filling device performs filling operation, the first through hole and the third through hole 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 is switched to make the first through hole and the second through hole connected, and the filling material in the piston cylinder can be pressed into the switch valve. When the filling device performs cleaning operation, the rotary valve core in the rotary valve moves partially away from the valve core cavity in the axial direction, so that the first through hole, the second through hole and the third through hole are all connected, and the cleaning liquid injected by the material cylinder can directly fill the rotary valve, the piston cylinder and the switch valve and the pipelines connected thereto, so as to fully soak and clean the entire filling device, and the cleaning liquid can be discharged from the switch valve / piston cylinder through the first pipeline and the second pipeline respectively.

[0016] Preferably, in the technical solution of the present invention, the material cylinder comprises 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 the feed rate of the first feed port.

[0017] According to the technical solution of the present invention, when the filling device is cleaning, the cleaning liquid enters the material tank through the first feed port, and the filling device is slowly soaked with water; the cleaning liquid enters the material tank through the second feed port, and the filling device is quickly rinsed. By combining different cleaning modes, the cleaning effect and cleaning efficiency are further improved.

[0018] In the technical solution of the present invention, a cleaning method for a filling device is also provided, which is applied to the above-mentioned filling device. The cleaning method for the filling device includes: a connecting step, installing a dummy cup to connect the switch valve with the first pipeline, and opening the switch valve, moving the piston, connecting the second pipeline with the first end of the piston cylinder, and the first cylinder drives the rotary valve core to separate from the valve core chamber; a liquid filling step, closing the first valve and the second valve, injecting cleaning liquid into the material cylinder, and filling the switch valve and the piston cylinder through the rotary valve; a liquid discharging step, opening the first valve and / or the second valve, injecting cleaning liquid into the material cylinder, flowing to the switch valve and / or the piston cylinder through the rotary valve, and being discharged by the first valve and / or the second valve.

[0019] According to the technical solution of the present invention, in the liquid feeding step, the cleaning liquid is injected into the filling device from the material cylinder, at which time the rotary valve core in the rotary valve moves partially away from the valve core cavity in the axial direction, so that the first through hole, the second through hole and the third through hole are all connected, and the cleaning liquid injected from the material cylinder can directly fill the rotary valve, the piston cylinder and the switch valve and the pipelines connected thereto, so as to fully soak and clean the entire filling device, and the cleaning liquid can be discharged from the switch valve / piston cylinder through the first pipeline and the second pipeline respectively. Thereby, the purpose of eliminating cleaning dead angles and improving the cleaning effect is achieved.

[0020] In the method for cleaning a filling device provided by the technical solution of the present invention, in the liquid feeding step, the cleaning liquid is injected into the material cylinder from the first feed port; in the liquid discharging step, the cleaning liquid is injected into the material cylinder from the second feed port.

[0021] According to the technical solution of the present invention, when the filling device is cleaned, the cleaning liquid enters the material tank through the first feed port, and the filling device is slowly soaked with water; the cleaning liquid enters the material tank through the second feed port, speeding up the flow of the cleaning liquid and quickly flushing the filling device. By combining different cleaning modes, the cleaning effect and cleaning efficiency are further improved.

[0022] The cleaning method of the filling device provided by the technical solution of the present invention also includes a first liquid intake step, in which the first valve and the second valve are opened, and the cleaning liquid is injected into the first valve, passes through the switch valve, the rotary valve and the piston cylinder in sequence, and is discharged from the second valve.

[0023] The cleaning method of the filling device provided by the technical solution of the present invention also includes a second liquid intake step, in which the first valve and the second valve are opened, and the cleaning liquid is injected into the second valve, passes through the piston cylinder, the rotary valve and the switch valve in sequence, and is discharged from the first valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of a plunger type filling valve provided in the prior art.

[0025] Figure 2It is a schematic diagram of a plunger type filling valve provided in the first embodiment of the present invention.

[0026] Figure 3 Schematic diagram of a piston cylinder and a piston provided in a first embodiment of the present invention.

[0027] FIG. 4( a ) is a partially enlarged schematic diagram of a rotary valve provided in the first embodiment of the present invention.

[0028] FIG. 4( b ) is a partially enlarged schematic diagram of the rotary valve provided in the first embodiment of the present invention.

[0029] Figure 5 It is a schematic diagram of a filling device provided in the second embodiment of the present invention.

[0030] Figure 6 It is a flow chart of a method for cleaning a plunger-type filling valve provided in the third embodiment of the present invention.

[0031] Figure 7 It is a cleaning schematic diagram of a first liquid inlet step provided in the third embodiment of the present invention.

[0032] Figure 8 It is a cleaning schematic diagram of a second liquid inlet step provided in the third embodiment of the present invention.

[0033] Description of the accompanying drawings: 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 cavity, 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-rotating 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

[0034] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0035] [First embodiment]

[0036] Figure 2 It is a schematic diagram of a plunger type filling valve provided in the first embodiment of the present invention.

[0037] like Figure 2 As shown, in the first embodiment of the present invention, a plunger filling valve 1 is provided, which can be used for filling relatively viscous materials. The plunger 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.

[0038] Figure 3 It is a schematic diagram of a piston cylinder 2 and a piston 3 provided in the first embodiment of the present invention.

[0039] like Figure 2 and Figure 3 As shown, in the first embodiment of the present invention, the piston cylinder 2 is cylindrical as a whole, and when the plunger filling valve 1 performs material filling, the material is filled 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 arranged in the piston cylinder 2, and enters and exits the piston cylinder 2 through the first end 201 of the piston cylinder 2, and is used to press the material in the piston cylinder 2 out for filling; the rotary valve 4 is arranged at the second end 202 of the piston cylinder 2.

[0040] The piston 3 includes a piston head 31 and a piston rod 32. The piston head 31 is in a thick cylindrical shape, and its outer circumference 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.

[0041] FIG. 4( a ) and FIG. 4( b ) are partial enlarged schematic views of the rotary valve 4 provided in the first embodiment of the present invention.

[0042] refer to Figure 24(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, and the outer wall of the valve body 41 is provided with a first through hole 411, a second through hole 412 and a third through hole 413 which are all 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.

[0043] The rotary valve core 42 is in a cone or frustum shape 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 .

[0044] 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, and a first opening connecting tube 425 and a second opening connecting tube 426 are provided inside, and the two ends of the second opening connecting tube 426 are respectively the first opening 421 and the second opening 422, and the two ends of the first opening connecting tube 425 are respectively the third opening 423 and the fourth opening 424. The rotary valve core 42 in the rotary valve 4 matches and abuts against the valve core cavity 410, and can fill the valve core cavity 410, and the liquid flow inside is realized through the first opening connecting tube 425 and / or the second opening connecting tube 426.

[0045] Specifically, referring to FIG. 4( a ), the first opening 421 is disposed at the end of the rotary valve core 42 with a 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 is in communication 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 disposed on the outer side surface of the rotary valve core 42, i.e., the side surface of a cone or a truncated cone. When the first opening 421 is in communication with the second through hole 412 of the valve body 41, the second opening 422 can be in communication with the first through hole 411, so that the second opening communication pipe 426 inside the rotary valve core 42 is in communication, i.e., the piston cylinder 2 is in communication with the external device disposed in the second through hole 412.

[0046] 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 to the third through hole 413, so that the first opening portion connecting tube 425 inside the rotary valve core 42 is connected, that is, the piston cylinder 2 is connected to the external equipment arranged in the third through hole 413.

[0047] The first cylinder 43 is connected to the end of the rotary valve core 42 with a larger diameter in the axial direction L, and can drive the rotary valve core 42 to move along the axial direction L to partially detach 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.

[0048] In the first embodiment of the present invention, the rotary valve 4 further includes a sealing member 44, a rotary valve shaft 45, and a second cylinder 46. The sealing member 44 is disposed between the rotary valve core 42 and the valve core cavity 410, and is used to prevent the filling material from overflowing from the gap between the rotary valve core 42 and the valve core cavity 410, thereby improving the air tightness of the rotary valve 4 and ensuring the filling pressure of the plunger filling valve 1. The first cylinder 43 and the second cylinder 46 are both connected to the rotary valve core 42 through the rotary valve shaft 45; the second cylinder 46 drives the rotary valve core 42 to rotate along the axial direction L, thereby realizing the conduction switching of the first opening portion connecting pipe 425 / the second opening portion connecting pipe 426 inside the rotary valve 4.

[0049] 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.

[0050] In the first embodiment of the present invention, when the plunger filling valve 1 is being filled, 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 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 filling valve 1. When the plunger filling valve 1 is being cleaned, the cleaning liquid enters the rotary valve 4 and the piston cylinder 2 of the plunger filling valve 1 from the external device, and there is a cleaning dead angle at the abutment position between the rotary valve core 42 and the valve core chamber 410. In the present embodiment, the first cylinder 43 drives the rotary valve core 42 to move along the axial direction L to partially detach 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.

[0051] Preferably, in the first embodiment of the present invention, the piston cylinder 2 includes a first section 21 and a second section 22 which are connected, and an inner diameter D1 of the first section 21 is greater than an inner diameter D2 of the second section 22 .

[0052] In this embodiment, the piston 3 is disposed in the piston cylinder 2, and is used to press the material in the piston cylinder 2 out 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 a thick cylindrical shape. 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 surface close to the first section 21 can be fully contacted with the cleaning liquid for cleaning.

[0053] In the first embodiment of the present invention, the plunger-type filling valve 1 can be directly cleaned on-site without being disassembled, and the traditional cleaning dead corners in the plunger-type filling valve 1, such as the abutment position between the rotary valve core 42 and the valve body 41, the seal 44, etc., can be effectively cleaned to improve 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.

[0054] [Second embodiment]

[0055] Figure 5 It is a schematic diagram of a filling device provided in the second embodiment of the present invention.

[0056] 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.

[0057] 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 for storing and conveying filling materials. When the first opening connecting pipe 425 of the rotary valve 4 is turned on, the filling material in the material cylinder 110 can enter the piston cylinder 2.

[0058] 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. A cleaning ball is installed at the first feed port 111; the feeding rate of the second feed port 112 is greater than the feeding rate of the first feed port 111. When the filling device 100 is cleaning, the cleaning liquid can enter the material cylinder 110 through the first feed port 111, and slowly soak the various devices and pipelines in the filling device 100; the cleaning liquid can also enter the material cylinder 110 through the second feed port 112, and quickly flush the various devices and pipelines in the filling device 100. By combining different cleaning modes, the cleaning effect and cleaning efficiency are further improved.

[0059] In the second embodiment of the present invention, the inlet end of the switch valve 120 is connected to the plunger filling valve 1 through the second through hole 412 of the rotary valve 4. When the second opening of the rotary valve 4 is connected to the connecting pipe 426, the filling material in the piston cylinder 2 can be pressed into the switch valve 120. The outlet end of the switch valve 120 can be used to connect the product to be filled, and the filling material is pressed into the product to be filled to complete the filling operation. The outlet end of the switch valve 120 can also be used to connect the liquid outlet pipeline to discharge the filling material / cleaning liquid out of the filling device 100.

[0060] In this embodiment, the first valve 130 is connected to the switch valve 120 through the first pipeline 160, and the first valve 130 can be used to introduce / discharge materials in the switch valve 120. Preferably, the switch valve 120 and the first pipeline 160 are connected through the dummy cup 150 to achieve the valve port sealing of the switch valve 120. Similarly, the second valve 140 is connected to the first end 201 of the piston cylinder 2 through the second pipeline 170, and the second valve 140 can be used to introduce / discharge materials in the piston cylinder 2.

[0061] When the filling device 100 performs the filling operation, the first opening connecting pipe 425 of the transfer valve 4 of the plunger-type filling valve 1 is turned on, and the filling material enters the piston cylinder 2 from the material cylinder 110, completing the material filling of the piston cylinder 2. Then, the transfer valve 4 switches to make the second opening connecting pipe 426 turned on, and the piston 3 presses the filling material in the piston cylinder 2 into the switch valve 120 to perform the filling operation.

[0062] 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 connected at the same time, and the flow direction of the cleaning liquid is as 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, so as 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.

[0063] [Third embodiment]

[0064] Figure 6 It is a flow chart of a method for cleaning a plunger-type filling valve provided in the third embodiment of the present invention.

[0065] 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.

[0066] In the third embodiment of the present invention, 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 intake 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 discharge 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 by the first valve 130 and / or the second valve 140.

[0067] 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 air 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.

[0068] 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 and the switch valve 120 and the various pipelines connected thereto, so as to fully soak and clean the entire filling device 100.

[0069] In the liquid discharge step S3, the cleaning liquid is injected from the second feed port 112 of the material cylinder 110. At this time, the liquid in the liquid injection step S2 is still present in the rotary valve 4, piston cylinder 2, switch valve 120 and various pipelines connected thereto in the filling device 100. The cleaning liquid can quickly flush the rotary valve 4, piston cylinder 2, switch valve 120 and various pipelines connected thereto in the filling device 100. At the same time, the cleaning liquid in the switch valve 120 is discharged through the first valve 130 connected to the first pipeline 160, and / or the cleaning liquid in the piston cylinder 2 is discharged through the second valve 140 connected to the second pipeline 170.

[0070] 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 through different directions and angles to further improve the cleaning effect.

[0071] Figure 7 It is a schematic diagram of a cleaning liquid flow path of a first liquid inlet step S4 provided in the third embodiment of the present invention.

[0072] 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 feeding 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 shown by the dotted arrow.

[0073] 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 from the material cylinder 110 and the first valve 130 and is discharged from the second valve 140.

[0074] Figure 8 It is a schematic diagram of a cleaning liquid flow path of a second liquid inlet step S5 provided in the third embodiment of the present invention.

[0075] refer to Figure 8In the third embodiment of the present invention, the cleaning method of the filling device 100 further includes a second liquid feeding 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 shown by the dotted arrow.

[0076] 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.

[0077] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope 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 is disposed at the second end of the piston cylinder, and the rotary valve comprises: A valve body having a valve core cavity, wherein the outer wall of the valve body is provided with a first through hole, a second through hole and a third through hole which are all 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 is in a cone or frustum shape 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 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 detach 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 end of the rotary valve core with a smaller diameter in the axial direction has a first opening, 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 communicates the first opening with the second opening, and the first opening communicating tube communicates 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 type filling valve according to claim 1, characterized in that: The piston cylinder comprises 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 at the second section of the piston cylinder, and 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 filling valve according to any one of claims 1 to 4, and further comprises: a switch 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 with each other through the dummy cup.

6. The filling device according to claim 5, characterized in that: The cylinder comprises: The first feed inlet 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.

7. A method for cleaning a filling device, characterized in that: Applied to the filling device as claimed in claim 6, the cleaning method of the filling device comprises: a connecting step, installing the dummy cup, connecting the switch valve with the first pipeline, opening the switch valve, moving the piston, connecting the second pipeline with the first end of the piston cylinder, and the first cylinder drives the rotary valve core to leave the valve core chamber; A liquid filling step, closing the first valve and the second valve, injecting the cleaning liquid into the material cylinder, and filling the switch valve and the piston cylinder through the rotary valve; The liquid discharge step is to open the first valve and / or the second valve, inject the cleaning liquid into the material cylinder, flow to the switch valve and / or the piston cylinder through the rotary valve, and be discharged from the first valve and / or the second valve.

8. The method for cleaning a filling device according to claim 7, characterized in that: In the liquid feeding step, the cleaning liquid is injected into the material cylinder from the first feed port; In the liquid discharge step, the cleaning liquid is injected into the material cylinder from the second feed port.

9. The method for cleaning a filling device according to claim 7, characterized in that: The method further comprises a first liquid inlet step, in which the first valve and the second valve are opened, and cleaning liquid is injected into the first valve, passes through the switch valve, the rotary valve and the piston cylinder in sequence, and is discharged from the second valve.

10. The method for cleaning a filling device according to claim 7, characterized in that: The method further comprises a second liquid inlet step, in which the first valve and the second valve are opened, and the cleaning liquid is injected into the second valve, passes through the piston cylinder, the rotary valve and the switch valve in sequence, and is discharged from the first valve.

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