Filling valve assembly and filling device

Abstract

The utility model discloses a filling valve assembly and a filling device. The filling valve assembly comprises a filling valve body and a power unit, the filling valve body comprises a valve body and a valve element. The power unit comprises a connecting rod and a rubber sleeve; one end of the connecting rod extends into the valve body, is detachably connected with the valve element and is used for driving the valve element to move in the vertical direction so as to open the discharging opening of the valve body; the rubber sleeve is sleeved on the outer wall of the connecting rod, and two ends of the rubber sleeve are respectively clung to the top wall of the inner cavity of the valve body and the end part of the valve core, so that an isolation cavity separated from the inner cavity of the valve body is formed among the rubber sleeve, the valve core and the top wall of the inner cavity of the valve body; wherein the isolation chamber can contract. Through the arrangement, the internal environment and the external environment of the valve body are effectively isolated, the sealing performance between the connecting rod and the valve body is improved, the filling reliability is correspondingly improved, and the requirements of modern industrial production for high quality, high efficiency and high safety are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of filling, in particular to a filling valve assembly and filling device. BACKGROUND

[0002] In the field of liquid filling, the performance of the filling valve directly affects the efficiency, accuracy and safety of the filling operation. With the continuous improvement of the requirements of various industries on product quality and production environment, the traditional filling valve has exposed many problems in actual application. For example, in the prior art, the filling valve is externally provided with a power device, such as a cylinder, a motor, etc. These power devices will drive the valve core in the valve body to move. Since the power is from the outside, the valve core usually needs to be connected with a connecting rod extending to the outside of the valve body, so the gap leakage problem at the connecting part of the connecting rod and the valve body is particularly significant.

[0003] The previous filling valve often focuses on realizing the basic filling function in design, and lacks sufficient attention and effective solutions to the sealing link between the connecting rod and the valve body. In the long-term use process, due to the frequent opening and closing operation of the filling valve, the relative movement between the connecting rod and the valve body causes the sealing element at the connecting part to gradually wear out, thereby gradually expanding the originally small gap. At the same time, factors such as pressure fluctuation, temperature change and corrosive components of the liquid during the filling process also accelerate the aging and damage of the sealing element, further weakening the sealing performance of the connecting part.

[0004] This leakage problem has brought many adverse effects to the production enterprises. On the one hand, the leaked liquid not only causes waste of raw materials, increases production cost, but also may pollute the filling equipment and the surrounding work area, increases the difficulty and cost of cleaning and maintenance, and seriously affects the normal operation of the entire production line. On the other hand, for some industries with strict hygiene standards, such as food, medicine, etc., the leaked liquid may cause product quality problems and pose potential risks to the health of consumers.

[0005] Therefore, a filling valve assembly and filling device are needed to solve the above problems. SUMMARY

[0006] The utility model aims at providing a filling valve assembly and filling device to effectively isolate the internal environment of the valve body from the external environment, improve the sealing performance between the connecting rod and the valve body, correspondingly improve the reliability of filling, and meet the requirements of modern industrial production for high quality, high efficiency and high safety.

[0007] To solve the above technical problems, the utility model provides a filling valve assembly, which comprises a filling valve body and a power unit.

[0008] The filling valve body comprises a valve body and a valve core.

[0009] The power unit comprises a connecting rod and a rubber sleeve;

[0010] One end of the connecting rod extends into the valve body and is detachably connected with the valve core for driving the valve core to move in the vertical direction to open or close the discharge port of the valve body;

[0011] The rubber sleeve is sleeved on the outer wall of the connecting rod and tightly contacts the end of the valve core and the top wall of the inner cavity of the valve body, so that an isolation chamber is formed between the rubber sleeve, the valve core and the top wall of the inner cavity of the valve body, which is separated from the inner cavity of the valve body;

[0012] The isolation chamber can be contracted.

[0013] Further, the connecting rod and the valve core are connected through threads, and the outer wall of the connecting rod is provided with an annular expansion block;

[0014] The inner wall of the rubber sleeve is interference-fitted with the annular expansion block, so that when the connecting rod and the valve core rotate relative to each other, the end of the rubber sleeve is pressed and tightly contacts the valve core under the action of the annular expansion block and the end face of the valve core.

[0015] Further, the power unit further comprises a threaded coupling sleeved on the outer part of the connecting rod and a locking nut rotatably installed on the surface of the valve body;

[0016] One end of the threaded coupling extends into the valve body and is clamped with one end of the rubber sleeve, and the other end extends to the outer part of the valve body and is threadedly connected with the outer wall of the locking nut;

[0017] When the locking nut rotates, it drives the threaded coupling to move along the axial line direction, so that the end of the rubber sleeve can be tightly fixed with the top wall of the inner cavity of the valve body, and the locking nut is tightly fixed with the surface of the valve body.

[0018] Further, the outer wall of the connecting rod is provided with a gas guide groove in communication with the isolation chamber;

[0019] The outer wall of the locking nut is provided with an inflation head, and the inflation head is in communication with the gas guide groove for injecting gas into the isolation chamber, so that a gap is always reserved between the rubber sleeve and the connecting rod.

[0020] Further, a guide sleeve is fixedly installed on the inner wall of the threaded coupling for limiting and guiding the connecting rod.

[0021] Further, the locking nut is provided with a first sealing ring on the side abutting with the valve body and the side abutting with the outer wall of the threaded coupling.

[0022] The two first sealing rings are respectively located on the upper and lower sides of the inflation head.

[0023] Further, the power unit further comprises a stroke cylinder.

[0024] The output end of the stroke cylinder is connected with the connecting rod through a connecting piece, for controlling the connecting rod to move in the vertical direction.

[0025] Further, the valve body comprises a valve shell, a filling head and a bushing.

[0026] The valve shell is provided with a feeding port at one end and is detachably connected with the filling head at the other end.

[0027] The valve core is located in the filling head.

[0028] The bushing is screw-installed on the outer wall of the valve shell and is provided with a stepped portion at the bottom end for clamping the outer wall of the filling head.

[0029] The stepped portion and the filling head and the connection between the filling head and the valve shell are provided with a second sealing ring.

[0030] Further, when the bushing is rotated to be connected with the valve shell, the filling head is driven by the stepped portion to be synchronously connected with the end surface of the valve shell, and the two second sealing rings are deformed.

[0031] In another aspect, the utility model further provides a filling device which comprises a storage tank and a plurality of filling valve assemblies as described in the above embodiments.

[0032] The plurality of filling valve assemblies are connected with the storage tank through connecting pipes.

[0033] The connecting pipes are provided with an electromagnetic flowmeter, a normally closed diaphragm valve and a normally open diaphragm valve in sequence from the direction away from the storage tank.

[0034] The normally open diaphragm valve is provided with a pressure regulating valve.

[0035] Compared with the prior art, the utility model has at least the following beneficial effects:

[0036] By setting a rubber sleeve that is fitted over the outside of the connecting rod and with its two ends tightly against the top wall of the valve body's inner cavity and the end of the valve core, an isolation chamber is formed between the top wall of the valve body's inner cavity, the rubber sleeve, and the end face of the valve core, separating it from the valve body's inner cavity. This isolation chamber can contract to ensure that the connecting rod does not interfere with the isolation chamber when it moves the valve core vertically. As a result, the slurry in the chamber formed by the valve body's inner cavity and the outer wall of the rubber sleeve is kept away from the external environment by the isolation chamber, thus isolating the internal environment of the valve body from the external environment and preventing slurry leakage. This improves filling reliability and meets the requirements of modern industrial production for high quality, high efficiency, and high safety.

[0037] Furthermore, by setting the connecting rod and valve core to a threaded connection, and providing an annular tensioning block on the outer wall of the connecting rod that engages with the rubber sleeve, one end of the rubber sleeve can be pressed and tightly adhered to the end face of the valve core when the valve core and connecting rod rotate relative to each other for connection. Additionally, by providing a locking nut and a threaded coupling, with one end of the threaded coupling engaging with the other end of the rubber sleeve, the threaded coupling moves vertically under the rotation of the locking nut, allowing the end of the rubber sleeve furthest from the valve core to better adhere to the top wall of the valve body cavity. This quickly achieves the limiting position of both ends of the rubber sleeve, thereby ensuring the sealing and isolation effect of the isolation chamber formed by the rubber sleeve, valve core, and the top wall of the valve body cavity.

[0038] Furthermore, by setting an inflation head on the outer wall of the locking nut to inject gas into the isolation chamber, a gap is always maintained between the rubber sleeve and the connecting rod. This prevents the rubber sleeve from sticking to the connecting rod under the pressure of the slurry when it enters the valve body, thus avoiding interference with the subsequent movement of the connecting rod and improving the stability of the device operation. Attached Figure Description

[0039] Figure 1 This is a cross-sectional view of a filling valve assembly in one embodiment of the present invention;

[0040] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle;

[0041] Figure 3 This is a partial structural diagram of the contact point between the rubber sleeve of the filling valve assembly and the top wall of the valve body cavity in one embodiment of the present invention.

[0042] Figure 4 This is a schematic diagram of the filling device in another embodiment of the present invention;

[0043] Figure 5 This is a partial side view of the filling device in another embodiment of the present invention.

[0044] Icon labels:

[0045] 1. Filling valve body;

[0046] 11. Valve body; 111. Valve housing; 112. Filling head; 113. Bushing;

[0047] 12. Valve core;

[0048] 2. Power unit; 21. Connecting rod; 211. Gas guide channel; 22. Rubber sleeve; 23. Threaded coupling; 231. Guide sleeve; 24. Locking nut; 241. Inflation head; 25. Stroke cylinder;

[0049] 3. Annular tensioning block;

[0050] 4. First sealing ring;

[0051] 5. Second sealing ring;

[0052] 6. Storage tanks;

[0053] 7. Electromagnetic flowmeter;

[0054] 8. Normally closed diaphragm valve;

[0055] 9. Normally open diaphragm valve;

[0056] 10. Pressure regulating valve. Detailed Implementation

[0057] The filling valve assembly and filling device of this utility model will now be described in more detail with reference to the schematic diagrams, which illustrate preferred embodiments of this utility model. It should be understood that those skilled in the art can modify the utility model described herein while still achieving its advantageous effects. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit the utility model.

[0058] The present invention will be described in more detail below by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0059] Example 1

[0060] like Figures 1 to 3 As shown in the figure, this utility model embodiment proposes a filling valve assembly, including a filling valve body 1 and a power unit 2.

[0061] The filling valve body 1 includes a valve body 11 and a valve core 12. The valve core 12 is movably installed at the discharge port of the valve body 11 so that the discharge port can be opened or closed by the vertical movement of the valve core 12.

[0062] The power unit 2 includes a connecting rod 21 and a rubber sleeve 22.

[0063] One end of the connecting rod 21 extends into the interior of the valve body 11 and is detachably connected to the valve core 12. It is used to drive the valve core 12 to move in the vertical direction to open or close the outlet of the valve body 11. By opening the outlet of the valve body 11, the slurry can be filled.

[0064] The rubber sleeve 22 is fitted on the outer wall of the connecting rod 21, and its two ends are respectively in close contact with the top wall of the inner cavity of the valve body 11 and the end of the valve core 12, so that an isolation chamber is formed between the rubber sleeve 22, the valve core 12 and the top wall of the inner cavity of the valve body 11, which is separated from the inner cavity of the valve body 11.

[0065] The isolation chamber effectively encloses the passage between the connecting rod 21 and the valve body 11, ensuring that the slurry within the cavity formed by the inner cavity of the valve body 11 and the outer wall of the rubber sleeve 22 remains isolated from the external environment. This prevents the slurry from leaking through the gap between the connecting rod 21 and the valve body 11, thus preventing contamination and meeting the demands of modern industrial production for high quality, high efficiency, and high safety.

[0066] It should be noted that the isolation chamber can contract to ensure that when the connecting rod 21 moves the valve core 12 in the vertical direction, the isolation chamber will not interfere with the movement of the connecting rod 21, thus ensuring the smooth operation of the device.

[0067] In a specific example, the sleeve 22 can be made of a flexible material to achieve the function of isolating the chamber from contraction.

[0068] like Figure 2 As shown, in a further embodiment, in order to facilitate the tight pressing between the rubber sleeve 22 and the end face of the valve core 12, the connection relationship between the connecting rod 21 and the valve core 12 is further defined, and an annular tensioning block 3 is added to improve the stability of the connection between the rubber sleeve 22 and the end face of the valve core 12.

[0069] Specifically, the connecting rod 21 and the valve core 12 are connected by a thread, that is, the valve core 12 and the connecting rod 21 can rotate relative to each other to achieve self-locking.

[0070] The annular tensioning block 3 is disposed on the outer wall of the connecting rod 21, and the inner wall of the rubber sleeve 22 is press-fitted with the annular tensioning block 3. When the connecting rod 21 and the valve core 12 rotate relative to each other, the end of the rubber sleeve 22 is pressed and tightly adhered to the valve core 12 under the action of the annular tensioning block 3 and the end face of the valve core 12.

[0071] It should be noted that an annular clamping cavity is formed between the protrusion of the annular tensioning block 3 and the end face of the valve core 12. When the connecting rod 21 rotates relative to the valve core 12, the height of the annular clamping cavity gradually decreases to complete the clamping of the rubber sleeve 22, thereby making the end of the rubber sleeve 22 fit tightly against the valve core 12.

[0072] like Figure 3 As shown, in a further embodiment, the power unit 2 is further defined to better achieve a locking fit between the end of the rubber sleeve 22 away from the valve core 12 and the top wall of the inner cavity of the valve body 11, thereby improving the sealing performance of the isolation chamber.

[0073] The power unit 2 also includes a threaded coupling 23 sleeved on the outside of the connecting rod 21 and a locking nut 24 rotatably mounted on the surface of the valve body 11.

[0074] One end of the threaded coupling 23 extends into the valve body 11 and engages with one end of the rubber sleeve 22, while the other end extends to the outside of the valve body 11 and is threadedly connected to the locking nut 24 on its outer wall. The movement of the threaded coupling 23 drives the end of the rubber sleeve 22 to move until the end of the rubber sleeve 22 moves to be in close contact with the top wall of the inner cavity of the valve body 11.

[0075] Specifically, when the locking nut 24 rotates, it drives the threaded coupling 23 to move along its axis (i.e., vertically), so that the end of the rubber sleeve 22 can be tightly fixed against the top wall of the inner cavity of the valve body 11, while the locking nut 24 is tightly fixed against the surface of the valve body 11. That is, the gap formed between the locking nut 24 and the rubber sleeve 22 is consistent with the thickness of the top wall and the upper surface of the inner cavity of the valve body 11, thereby completing the locking function.

[0076] The device is provided with the connecting rod 21 and the valve core 12 by screwing, and the outer wall of the connecting rod 21 is provided with the annular expansion block 3 which is clamped with the rubber sleeve 22, so that when the valve core 12 rotates relative to the connecting rod 21 for connection, one end of the rubber sleeve 22 can be extruded and tightly attached to the end face of the valve core 12. And, by setting the locking nut 24 and the threaded coupling 23, and the threaded coupling 23 is clamped with the other end of the rubber sleeve 22, so that under the rotation of the locking nut 24, the threaded coupling 23 moves in the vertical direction, so that the other end of the rubber sleeve 22 away from the valve core 12 can be better attached to the top wall of the inner cavity of the valve body 11, so as to quickly realize the limiting of both ends of the rubber sleeve 22, and further ensure the sealing isolation effect of the isolation chamber formed by the rubber sleeve 22, the valve core 12 and the top wall of the inner cavity of the valve body 11.

[0077] Please continue to refer to Figure 3 In other embodiments, since the slurry will form an extrusion force on the rubber sleeve 22 when it is located inside the valve body 11, the rubber sleeve 22 is forced to deform along the direction close to the connecting rod 21, thereby forming adhesion with the connecting rod 21, and further causing the connecting rod 21 to form friction with the rubber sleeve 22 during operation (i.e. moving in the vertical direction), thereby causing the slurry to leak from the damaged part of the rubber sleeve 22. Therefore, the inflation head 241 is added to avoid the adhesion of the rubber sleeve 22 to the connecting rod 21 and the friction damage of the rubber sleeve 22.

[0078] Specifically, the outer wall of the connecting rod 21 is provided with a gas guide groove 211 which is in communication with the isolation chamber, so as to better inject gas into the isolation chamber.

[0079] The outer wall of the locking nut 24 is provided with an inflation head 241, and the inflation head 241 is in communication with the gas guide groove 211, which is used to inject gas into the isolation chamber, that is, by injecting gas, the rubber sleeve 22 is in a full state, so that a gap is always reserved between the rubber sleeve 22 and the connecting rod 21, thereby effectively preventing the connecting rod 21 from being rubbed due to the adhesion of the rubber sleeve 22 during operation, and improving the stability of the device.

[0080] It should be noted that since the connecting rod 21 will contact the outside during movement, the isolation chamber will slowly leak, therefore, the inflation head 241 is always in the state of injecting gas, and the amount of gas injection needs to be adjusted according to the fullness of the rubber sleeve 22, which is a prior art and will not be described here.

[0081] In other embodiments, the inner wall of the threaded coupling 23 is embedded with a guide sleeve 231 which is fixedly installed, which is used for limiting and guiding the connecting rod 21 to run along the predetermined track, and can reduce the wear of the connecting rod 21 and prolong the service life of the connecting rod 21.

[0082] In further embodiments, in order to prevent the injected gas in the isolation chamber from leaking too fast, resulting in waste of gas resources, the locking nut 24 is further limited to improve the sealing effect.

[0083] Specifically, the side of the locking nut 24 that is attached to the valve body 11 and the side that is attached to the outer wall of the threaded shaft 23 are both provided with a first sealing ring 4, wherein the two first sealing rings 4 are respectively located on the upper and lower sides of the inflation head 241.

[0084] In other embodiments, the power unit 2 further includes a stroke cylinder 25, the output end of the stroke cylinder 25 is connected with the connecting rod 21 through a connecting piece, for controlling the connecting rod 21 to move in the vertical direction.

[0085] In this embodiment, a combined valve body 11 is also proposed, so as to facilitate the connection of the valve core 12 and the connecting rod 21 and facilitate disassembly, replacement and maintenance, and through the combined design of the valve body 11, cleaning and disinfection operations are more thorough and convenient, and each component can be individually disassembled for cleaning and disinfection, ensuring that there is no dead angle left, thereby effectively avoiding bacterial breeding and cross contamination.

[0086] Specifically, the valve body 11 includes a valve shell 111, a filling head 112, and a bushing 113.

[0087] Wherein, one end of the valve shell 111 has a feed inlet, the other end is detachably connected with the filling head 112, and the valve core 12 is located in the filling head 112.

[0088] The bushing 113 is threadedly installed on the outer wall of the valve shell 111, and the bottom end has a stepped portion that is engaged with the outer wall of the filling head 112. Through the threaded installation of the bushing 113, the connection between the filling head 112 and the valve shell 111 is realized under the support of the stepped portion.

[0089] Furthermore, the stepped portion and the filling head 112, and the connection between the filling head 112 and the valve shell 111 are all provided with a second sealing ring 5.

[0090] So that when the bushing 113 is rotated to be connected with the valve shell 111, the filling head 112 is driven by the stepped portion to be connected with the end face of the valve shell 111 synchronously, and the two second sealing rings 5 are deformed to ensure the sealing effect of the connection between the components, prevent slurry leakage, and ensure safety.

[0091] In the embodiment, by setting the valve body 11 structure integrally arranged in the prior art into multiple components including the valve housing 111, the filling head 112 and the bushing 113 and the valve body 11, and the connection function between the multiple components can be completed through the bushing 113, the purpose of facilitating disassembly and replacement of a single component is achieved.

[0092] And, due to the detachable connection of the filling head 112 and the valve housing 111, the valve core 12 can be connected with the connecting rod 21 in advance, and then the filling head 112 and the valve housing 111 are assembled, the purpose of simple overall device installation is achieved.

[0093] In addition, due to the detachable connection of the filling head 112 and the valve housing 111, different filling heads 112 can be selectively installed according to requirements to realize different filling application scenarios.

[0094] Embodiment two

[0095] As shown in Figure 4 and Figure 5 , the embodiment further proposes a filling device based on the embodiment one, which comprises a storage tank 6 and multiple groups of the filling valve assembly described in the embodiment one.

[0096] The multiple groups of the filling valve assembly are connected with the storage tank 6 through a connecting pipe.

[0097] Among them, the connecting pipe is sequentially provided with an electromagnetic flowmeter 7, a normally closed diaphragm valve 8 and a normally open diaphragm valve 9 from the direction away from the storage tank 6, and the normally open diaphragm valve 9 is provided with a pressure regulating valve 10.

[0098] By sequentially arranging the electromagnetic flowmeter 7, the normally closed diaphragm valve 8 and the normally open diaphragm valve 9 on the connecting pipe, the normally closed diaphragm valve 8 is used as a sealing device at rest, so that a closed structure can be formed between the normally closed diaphragm valve 8 and the valve body 11, and the pressure regulating valve 10 is arranged on the normally open diaphragm valve 9 to perform real-time feedback regulation of pressure, which can effectively ensure the stability of the subsequent filling valve assembly filling process.

[0099] And, by setting the filling device comprising the filling valve assembly in the embodiment one, the internal environment of the valve body 11 can be effectively isolated from the external environment, the sealing performance between the connecting rod 21 and the valve body 11 is improved, so as to correspondingly improve the reliability of filling, and meet the requirements of modern industrial production for high quality, high efficiency and high safety.

[0100] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A fill valve assembly characterized by, The filling valve body and the power unit are included; The filling valve body includes a valve body and a valve core; The power unit includes a connecting rod and a rubber sleeve; One end of the connecting rod extends into the valve body and is detachably connected with the valve core, for driving the valve core to move in the vertical direction to open or close the discharge port of the valve body; The rubber sleeve is sleeved on the outer wall of the connecting rod, and the two ends are respectively in close contact with the inner cavity top wall of the valve body and the end of the valve core, so that the rubber sleeve, the valve core and the inner cavity top wall of the valve body form an isolation chamber separated from the inner cavity of the valve body; The isolation chamber can be contracted.

2. The fill valve assembly of claim 1, wherein, The connecting rod and the valve core are connected through threads, and the outer wall of the connecting rod is provided with an annular expansion block; The inner wall of the rubber sleeve is interference-fitted with the annular expansion block, so that when the connecting rod and the valve core rotate relative to each other, the end of the rubber sleeve is extruded and tightly attached to the valve core under the action of the annular expansion block and the end face of the valve core.

3. The fill valve assembly of claim 1, wherein, The power unit further includes a threaded coupling sleeved on the outer part of the connecting rod and a locking nut rotatably installed on the surface of the valve body; One end of the threaded coupling extends into the valve body and is engaged with one end of the rubber sleeve, and the other end extends to the outside of the valve body and is threadedly connected with the outer wall of the locking nut; When the locking nut rotates, it drives the threaded coupling to move along its axial line, so that the end of the rubber sleeve can be tightly fixed with the inner cavity top wall of the valve body, and the locking nut is tightly fixed with the surface of the valve body.

4. The fill valve assembly of claim 3, wherein, The outer wall of the connecting rod is provided with a gas guide groove in communication with the isolation chamber; The outer wall of the locking nut is provided with an inflation head, and the inflation head is in communication with the gas guide groove, for injecting gas into the isolation chamber, so that a gap is always reserved between the rubber sleeve and the connecting rod.

5. The fill valve assembly of claim 3, wherein, A guide sleeve is fixedly installed on the inner wall of the threaded coupling for limiting and guiding the connecting rod.

6. The fill valve assembly of claim 4, wherein, The side of the locking nut abutting with the valve body and the side of the locking nut abutting with the outer wall of the threaded coupling are both provided with a first sealing ring; The two first sealing rings are located on the upper and lower sides of the inflation head.

7. The fill valve assembly of claim 1, wherein, The power unit further includes a stroke gas cylinder; The output end of the stroke gas cylinder is connected with the connecting rod through a connecting piece, for controlling the connecting rod to move in the vertical direction.

8. The fill valve assembly of claim 1, wherein, The valve body includes a valve shell, a filling head and a bushing; One end of the valve shell has a feed port, and the other end is detachably connected with the filling head; The valve core is located in the filling head; The bushing is threadedly installed on the outer wall of the valve shell, and the bottom end has a step portion engaged with the outer wall of the filling head; The step portion and the filling head and the connection between the filling head and the valve shell are all provided with a second sealing ring.

9. The fill valve assembly of claim 8, wherein, When the bushing rotates to be connected with the valve shell, the filling head is synchronously connected with the end face of the valve shell through the step portion, and the two second sealing rings are deformed.

10. A filling device, characterized in that The filling valve assembly includes a storage tank and a plurality of groups of filling valve assemblies as claimed in any one of claims 1-9. A plurality of groups of the filling valve assemblies are connected with the storage tank through connecting pipes; The connecting pipes are sequentially provided with an electromagnetic flow meter, a normally closed diaphragm valve and a normally open diaphragm valve from the direction away from the storage tank; The normally open diaphragm valve is provided with a pressure regulating valve.

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