Active prefill valve structure

Abstract

The utility model discloses an active prefill valve structure, and relates to the technical field of prefill valves. The active prefill valve structure comprises a valve body, a valve element part, a piston part and an oil way driving assembly. An oil conveying cavity and a driving cavity which are independent of each other are arranged in the valve body, and the valve element piece is connected into the oil conveying cavity in a sliding mode. The piston piece is connected into the driving cavity in a sliding mode. The piston piece divides the driving cavity into a first cavity and a second cavity which are independent of each other, and the piston piece is connected with the valve element piece. The oil way driving assembly is used for injecting driving oil into the first cavity. According to the technical scheme provided by the utility model, quick response closing can be realized so as to reduce waiting delay time.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid filling valves, in particular to an active liquid filling valve structure. Background Art

[0002] Filling valves are widely used in machinery and equipment such as forging machinery, high-speed punching machines, presses or injection molding machines. They are mainly used to inject hydraulic oil from the accumulator into the oil cylinder of the mechanical equipment to ensure the effective operation of the mechanical equipment. Among them, the common filling valve includes a valve body and a valve core. The valve body is provided with an oil inlet and an oil outlet. During operation, by adjusting the internal pressure value of the accumulator, when the pressure value of the accumulator is higher than the pressure value of the cylinder, the hydraulic oil flows from the accumulator through the oil inlet and oil outlet of the filling valve and flows to the cylinder, thereby filling the cylinder with oil. When the pressure value of the accumulator is lower than the pressure value of the cylinder, a negative pressure difference is formed inside the accumulator. The pressure difference will drive the valve core to displace relative to the valve body and close the oil inlet, thereby isolating the connection between the oil inlet and oil outlet, and stopping the oil filling operation of the cylinder.

[0003] In the prior art, the charging valve closes by adjusting the pressure difference between the accumulator and the cylinder. This means the valve is closed passively. This passive closing method results in a certain waiting time when the charging valve closes, meaning the charging valve cannot respond quickly to close. For these reasons, there is an urgent need for a new charging valve that can respond quickly to close and reduce the waiting time.

[0004] It should be noted that the above content is only used to assist in understanding the technical solution of the present utility model, and does not mean that the above content is admitted to be prior art. Utility Model Content

[0005] The main purpose of the utility model is to propose an active liquid filling valve structure, aiming to achieve rapid response and closing to reduce waiting lag time.

[0006] In order to achieve the above-mentioned purpose, the utility model proposes an active liquid filling valve structure;

[0007] Specifically, the active filling valve structure includes:

[0008] The valve body is provided with an independent oil delivery chamber and a drive chamber inside the valve body, the oil delivery chamber is used as a flow space for hydraulic oil; the oil delivery chamber is connected to an oil inlet hole and an oil outlet hole, wherein the oil inlet hole is used to communicate with the accumulator, and the oil outlet hole is used to communicate with the oil cylinder;

[0009] a valve core member, the valve core member being slidably connected to the oil delivery chamber;

[0010] A piston member is slidingly connected in the driving chamber; the piston member divides the driving chamber into a first chamber and a second chamber, which are independent of each other, wherein the first chamber is located on the side of the second chamber away from the oil delivery chamber; the piston member is connected with the valve core member;

[0011] An oil path driving assembly is used to inject or discharge driving oil into the first chamber; when the oil path driving assembly performs the injection operation of the driving oil into the first chamber, the piston member moves towards the second chamber, and drives the valve core member to move close to the oil inlet hole to close the oil inlet hole.

[0012] In an embodiment, the valve body includes a valve body member and a valve body base, which are detachably and sealingly connected; the oil inlet hole and the oil outlet hole are arranged on the valve body member; the valve body base is provided with a driving oil hole, and the oil path driving assembly is connected with the first chamber through the driving oil hole.

[0013] In an embodiment, the oil path driving assembly includes a driving oil control device for injecting or discharging driving oil into the first chamber; the oil cylinder is provided with a pressure sensor and / or a displacement sensor, which are electrically connected with the driving oil control device through a controller;

[0014] In addition, the oil path driving assembly further includes a throttling device, two ends of which are connected with the first chamber and the driving oil control device respectively; wherein the throttling device is used to measure the flow of the driving oil;

[0015] In addition, the oil path driving assembly further includes a check valve, which is arranged in parallel with the throttling device; the passing direction of the check valve is directed to the driving oil control device.

[0016] In an embodiment, the inside of the piston member is provided with a piston inner cavity, and the inside of the piston inner cavity is provided with a piston spring, two ends of which are connected with the piston member and the first chamber respectively; wherein the elastic force direction of the piston spring is directed away from the oil inlet hole.

[0017] In an embodiment, the outside of the piston member is annularly provided with a first groove, and the first groove is mounted with a first sealing ring, which is sealingly fitted with the inside of the driving chamber.

[0018] In one embodiment, a valve core cavity is provided inside the valve core component, a valve core spring is provided inside the valve core cavity, and both ends of the valve core spring are respectively connected to the valve core component and the piston component; wherein the direction of the elastic force of the valve core spring is toward a direction away from the oil inlet hole.

[0019] In one embodiment, a plurality of oil through holes are formed on the side of the valve core member, and the oil through holes are connected to the oil delivery chamber and the inner cavity of the valve core.

[0020] In one embodiment, a guide sleeve is fixedly provided inside the valve body, and the guide sleeve is located between the oil delivery chamber and the drive chamber; a guide hole is provided through the middle of the guide sleeve, and at least part of the valve core member and at least part of the piston member are slidably connected to the guide hole.

[0021] In one embodiment, a second groove is provided in an annular shape on the outer side of the guide sleeve, a second sealing ring is installed in the second groove, and the second sealing ring is sealed and fitted with the inner side of the valve body.

[0022] In one embodiment, a plurality of third grooves are annularly provided on the outer side of the valve core member and / or the piston member, and the plurality of third grooves are distributed at intervals along the axis of the guide hole.

[0023] The technical solution of the present invention is to arrange the interior of the valve body into independent oil delivery chambers and driving chambers, and use the oil delivery chamber as the flow space of the hydraulic oil. During operation, the hydraulic oil flows out of the accumulator and passes through the oil inlet hole, the oil delivery chamber and the oil outlet hole in sequence and finally flows into the oil cylinder. At the same time, a piston is arranged in the driving chamber of the valve body, and the driving chamber is divided into a first chamber and a second chamber which are independent of each other by the piston. At the same time, the piston and the valve core are connected to each other to ensure that the valve core can be moved while the piston moves.

[0024] When the filling valve is closed to stop the oil injection into the cylinder, the oil circuit drive assembly is used to inject drive oil into the first chamber. As the volume of the first chamber increases due to the injection of drive oil, it pushes the piston member toward the second chamber. The piston member then drives the valve core member toward the oil inlet hole, closing the oil inlet hole and isolating the oil inlet hole from the oil outlet hole. Because the closing process of the filling valve is controlled by the oil circuit drive assembly, it does not rely on adjusting the pressure difference between the accumulator and the oil cylinder, which means it is an active closing method. The use of active closing method can achieve a fast response closing to reduce waiting lag time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the active liquid filling valve structure provided by the utility model;

[0027] Figure 2 for Figure 1 A partial enlarged view of point A in the middle;

[0028] Figure 3 This is a structural diagram of the valve body in an embodiment of the active liquid filling valve structure provided by the present invention (the liquid filling valve is in an actively closed state);

[0029] Figure 4 This is a structural diagram of the valve body in an embodiment of the active liquid filling valve structure provided by the present invention (the liquid filling valve is in a passive closed state);

[0030] Figure 5 This is a structural schematic diagram of the valve body in an embodiment of the active liquid filling valve structure provided by the present invention (the liquid filling valve is in the open and closed states).

[0031] Description of reference numerals:

[0032] 100, valve body; 110, oil inlet hole; 120, oil outlet hole; 130, valve body; 140, valve body base; 150, drive oil hole; 160, guide sleeve; 161, guide hole; 162, second groove; 163, second sealing ring; 200, oil delivery chamber; 300, drive chamber; 310, first chamber; 320, second chamber; 400, valve core; 410, valve core inner cavity; 420, valve core Spring; 430, oil hole; 440, third groove; 500, piston member; 510, piston inner cavity; 520, piston spring; 530, first groove; 600, oil circuit drive assembly; 610, drive oil control device; 620, throttling device; 630, one-way valve; 700, accumulator; 710, oil filling hole; 800, oil cylinder; 810, pressure sensor; 820, displacement sensor; 900, controller;

[0033] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] The following is a clear and complete description of the technical solutions of the present invention in conjunction with the accompanying drawings. Obviously, the description is only a 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 any creative efforts are within the scope of protection of the present invention.

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

[0036] In addition, it should be noted that the descriptions of "first", "second", etc. in this utility model are for descriptive purposes only and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0037] In the prior art, the closing of the filling valve is achieved by adjusting the pressure difference between the accumulator and the cylinder. That is, the closing of the filling valve is passive. The passive closing method will cause a certain waiting lag time when the filling valve is closed, that is, the filling valve cannot respond quickly to close.

[0038] In order to solve the above technical problems, the utility model proposes an active liquid filling valve structure.

[0039] See also Figure 1-3 In one embodiment of the present invention, the active filling valve structure includes:

[0040] The valve body 100 has an independent oil delivery chamber 200 and a drive chamber 300 disposed therein. The oil delivery chamber 200 is used as a flow space for hydraulic oil. The oil delivery chamber 200 is connected to an oil inlet hole 110 and an oil outlet hole 120. The oil inlet hole 110 is used to communicate with the accumulator 700, and the oil outlet hole 120 is used to communicate with the oil cylinder 800.

[0041] The valve core member 400 is slidably connected to the oil delivery chamber 200;

[0042] The piston member 500 is slidably connected to the drive chamber 300. The piston member 500 divides the drive chamber 300 into a first chamber 310 and a second chamber 320, which are independent of each other. The first chamber 310 is located on a side of the second chamber 320 away from the oil delivery chamber 200. The piston member 500 is interconnected with the valve core member 400.

[0043] The oil circuit drive assembly 600 is used to inject or discharge driving oil into the first chamber 310; when the oil circuit drive assembly 600 performs the operation of injecting driving oil into the first chamber 310, the piston member 500 moves toward the second chamber 320 and drives the valve core member 400 to move closer to the oil inlet hole 110 to close the oil inlet hole 110.

[0044] The technical solution of the present invention is to arrange the interior of the valve body 100 into an independent oil delivery chamber 200 and a drive chamber 300, and use the oil delivery chamber 200 as the flow space of the hydraulic oil. During operation, the hydraulic oil flows out of the accumulator 700 and passes through the oil inlet hole 110, the oil delivery chamber 200 and the oil outlet hole 120 in sequence and finally flows to the oil cylinder 800; at the same time, a piston member 500 is arranged in the drive chamber 300 of the valve body 100, and the piston member 500 is used to divide the drive chamber 300 into a first chamber 310 and a second chamber 320 that are independent of each other. At the same time, the piston member 500 is connected to the valve core member 400 to ensure that the piston member 500 can drive the valve core member 400 to move accordingly when it moves.

[0045] Reference Attachment Figure 3 When the filling valve is closed to stop the oil injection operation into the oil cylinder 800, the oil circuit drive assembly 600 is used to inject driving oil into the first chamber 310. As the volume of the first chamber 310 increases due to the injection of driving oil, it pushes the piston member 500 toward the second chamber 320. The piston member 500 then drives the valve core member 400 toward the oil inlet hole 110 to close the oil inlet hole 110, thereby isolating the oil inlet hole 110 from the oil outlet hole 120. Because the above-mentioned filling valve closing process is controlled by the oil circuit drive assembly 600, it does not rely on adjusting the pressure difference between the accumulator 700 and the oil cylinder 800. In other words, it is an active closing method. The use of active closing method can achieve a fast response closing to reduce waiting lag time.

[0046] Specifically, refer to the attached Figure 1The valve body 100 includes a valve member 130 and a valve base 140, which are detachably and hermetically connected. The oil inlet 110 and the oil outlet 120 are provided on the valve member 130. The valve base 140 is provided with a drive oil hole 150, through which the oil circuit drive assembly 600 is connected to the first chamber 310. This configuration, which configures the valve body 100 to consist of the valve member 130 and the valve base 140, facilitates assembly of components such as the valve core 400, the piston 500, and the guide sleeve 160 therein, and also facilitates maintenance and cleaning of the interior of the valve body 100.

[0047] Among them, refer to the attached Figure 1 There are many specific structures of the oil circuit drive assembly 600. In this embodiment, the oil circuit drive assembly 600 includes a drive oil control device 610, which is used to inject or discharge the drive oil into or out of the first chamber 310. In this arrangement, the drive oil control device 610 is used as a mobile power source for the drive oil to inject or discharge the drive oil into or out of the first chamber 310, ensuring the smooth implementation of the technical solution of the present application, with a simple structure and strong practicality.

[0048] Furthermore, the oil circuit drive assembly 600 also includes a throttling device 620, the two ends of which are connected to the first chamber 310 and the drive oil control device 610, respectively. The throttling device 620 is used to measure the flow rate of the drive oil. In this configuration, the throttling device 620, also known as a throttling flowmeter, generates a static pressure difference by increasing the flow rate and decreasing the static pressure, thereby measuring the fluid flow rate. In this embodiment, by providing the throttling device 620 between the first chamber 310 and the drive oil control device 610, it is possible to effectively measure the flow rate of the drive oil into or out of the first chamber 310, thereby facilitating accurate control of the opening and closing of the filling valve.

[0049] Furthermore, the oil circuit drive assembly 600 also includes a one-way valve 630, which is arranged in parallel with the throttling device 620; the flow direction of the one-way valve 630 points to the driving oil control device 610. With this arrangement, studying the injection amount of the driving oil rather than the discharge amount of the driving oil can be more helpful in accurately controlling the opening and closing degree of the filling valve; therefore, the one-way valve 630 and the throttling device 620 are designed to be in a parallel structure. When the driving oil is discharged, the driving oil can simultaneously flow through the throttling device 620 and the branch where the one-way valve 630 is located to the driving oil control device 610; when the driving oil is injected, the driving oil can only flow through the branch where the throttling device 620 is located to the driving oil control device 610. At this time, the flow value measured by the throttling device 620 is the injection amount of the driving oil.

[0050] Furthermore, the oil cylinder 800 is provided with a pressure sensor 810 and / or a displacement sensor 820, and the pressure sensor 810 and / or the displacement sensor 820 are electrically connected to the drive oil control device 610 via the controller 900. With such a configuration, pressure feedback is outputted via the pressure sensor, and displacement feedback is outputted via the displacement sensor. When the pressure feedback value or the displacement feedback value of the oil cylinder 800 reaches a preset value, the drive oil control device 610 is used to promptly drive the valve core member 400 to perform a closing operation, so as to prevent the oil cylinder 800 from being damaged due to excessive pressure or excessive displacement. The controller 900 can be a common PLC controller, and by internally programming the PLC controller, it drives the drive oil control device 610 to operate when the pressure value or the displacement value of the oil cylinder 800 reaches a preset value. Since the PLC controller belongs to the prior art, this application will not further elaborate on its structural principle.

[0051] As a preferred solution of the above embodiment, refer to the attached Figure 5 A piston cavity 510 is provided inside the piston member 500, and a piston spring 520 is provided inside the piston cavity 510. The two ends of the piston spring 520 are respectively connected to the piston member 500 and the first chamber 310; wherein the direction of the elastic force of the piston spring 520 is in the direction away from the oil inlet hole 110. In this way, in this embodiment, a piston spring 520 is provided in the piston inner cavity 510 of the piston member 500. After the driving oil is discharged from the first chamber 310, the elastic force of the piston spring 520 will drive the piston member 500 to move in the direction away from the oil inlet hole 110, that is, drive the piston member 500 to move toward the first chamber 310, so as to drive the valve core member 400 away from the oil inlet hole 110, thereby opening the oil inlet hole 110, so that the hydraulic oil can flow out of the accumulator 700 and pass through the oil inlet hole 110, the oil delivery chamber 200 and the oil outlet hole 120 in sequence and finally flow to the oil cylinder 800, ensuring the smooth implementation of the technical solution of this application.

[0052] Furthermore, a first groove 530 is annularly formed on the outer side of the piston 500. A first sealing ring (not shown) is mounted in the first groove 530 and seals against the inner side of the drive chamber 300. This arrangement ensures the isolation of the first chamber 310 and the second chamber 320 through the sealing action of the first sealing ring, preventing the drive oil from flowing into the second chamber 320 through the gap between the piston 500 and the valve body 100, potentially causing leakage.

[0053] As a preferred solution of the above embodiment, refer to the attached Figure 4The valve core component 400 is provided with a valve core inner cavity 410, and the valve core spring 420 is provided inside the valve core inner cavity 410. The two ends of the valve core spring 420 are respectively connected to the valve core component 400 and the piston component 500; wherein the direction of the elastic force of the valve core spring 420 is in the direction away from the oil inlet hole 110. In this way, by providing the valve core spring 420 in the valve core inner cavity 410 of the valve core component 400, the passive closing of the filling valve is achieved. It can be understood that when the pressure value of the accumulator 700 is lower than the pressure value of the oil cylinder 800, a negative pressure difference is formed inside the accumulator 700. The pressure difference will drive the valve core component 400 to overcome the elastic force of the valve core spring 420 and displace relative to the valve body 100 and close the oil inlet hole 110, thereby achieving the purpose of passive closing. In other words, the filling valve of the present application can achieve active closing and passive closing at the same time, so as to more effectively adapt to various operating scenarios and improve applicability.

[0054] Furthermore, a plurality of oil holes 430 are provided on the side of the valve core member 400, which communicate with the oil delivery chamber 200 and the valve core inner cavity 410. This arrangement is to prevent the valve core inner cavity 410 from forming a vacuum state due to the seal, thereby hindering the passive closing of the valve core member 400. In this embodiment, the plurality of oil holes 430 are provided on the side of the valve core member 400. Through these oil holes 430, the internal pressure of the valve core inner cavity 410 is kept substantially consistent with the external pressure of the valve core member 400, thereby preventing the valve core inner cavity 410 from forming a vacuum state due to the seal, and ensuring that the valve core member 400 can operate smoothly when passively closing.

[0055] As a preferred embodiment of the above embodiment, a guide sleeve 160 is fixedly disposed within the valve body 100 and positioned between the oil delivery chamber 200 and the drive chamber 300. A guide hole 161 is defined through the middle of the guide sleeve 160, through which at least a portion of the valve core member 400 and at least a portion of the piston member 500 are slidably connected. This arrangement ensures that the valve core member 400 and the piston member 500 can slide along a predetermined path, guided by the guide sleeve 160.

[0056] Furthermore, a second groove 162 is annularly formed on the outer side of the guide sleeve 160. A second sealing ring 163 is mounted in the second groove 162. The second sealing ring 163 seals against the inner side of the valve body 100. This arrangement ensures the isolation of the oil delivery chamber 200 and the second chamber 320 through the sealing effect of the second sealing ring 163, preventing hydraulic oil from flowing into the second chamber 320 through the gap between the guide sleeve 160 and the valve body 100, which could cause hydraulic oil leakage.

[0057] Furthermore, a plurality of third grooves 440 are annularly disposed on the outer sides of the valve core member 400 and / or the piston member 500, and are spaced apart along the axis of the guide hole 161. When the valve core member 400 and the piston member 500 slide along the guide sleeve 160 to the oil delivery chamber 200, some hydraulic oil adheres to the third grooves 440 of the valve core member 400 and / or the piston member 500. Due to the lubricating properties of the hydraulic oil, it acts as a lubricant between the valve core member 400 and the piston member 500 and the guide sleeve 160, thereby ensuring smooth movement of the valve core member 400 and the piston member 500 when sliding relative to the guide sleeve 160.

[0058] It should be noted that other contents of the active liquid filling valve structure disclosed in the present utility model are prior art and will not be described in detail here.

[0059] The above are only optional embodiments of the present invention and do not limit the patent scope of the present invention. Any direct / indirect application of the present invention in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. An active filling valve structure, characterized in that: The active filling valve structure includes: The valve body is provided with an independent oil delivery chamber and a drive chamber inside the valve body, the oil delivery chamber is used as a flow space for hydraulic oil; the oil delivery chamber is connected to an oil inlet hole and an oil outlet hole, wherein the oil inlet hole is used to communicate with the accumulator, and the oil outlet hole is used to communicate with the oil cylinder; a valve core member, the valve core member being slidably connected to the oil delivery chamber; a piston member, the piston member being slidably connected to the drive chamber; the piston member dividing the drive chamber into a first chamber and a second chamber that are independent of each other, wherein the first chamber is located on a side of the second chamber away from the oil delivery chamber; the piston member and the valve core member are interconnected; An oil circuit drive assembly is used to inject or discharge drive oil into the first chamber; when the oil circuit drive assembly performs the operation of injecting the drive oil into the first chamber, the piston moves toward the second chamber and drives the valve core to move closer to the oil inlet hole to close the oil inlet hole.

2. The active filling valve structure according to claim 1, characterized in that: The valve body includes a valve body part and a valve body base, and the valve body part and the valve body base are detachably sealed; the oil inlet hole and the oil outlet hole are arranged on the valve body part; the valve body base is provided with a driving oil hole, and the oil circuit driving assembly is connected to the first chamber through the driving oil hole.

3. The active filling valve structure according to claim 1, wherein: The oil circuit drive assembly includes a drive oil control device, which is used to inject or discharge drive oil into or out of the first chamber; the oil cylinder is provided with a pressure sensor and / or a displacement sensor, and the pressure sensor and / or the displacement sensor are electrically connected to the drive oil control device through a controller; Furthermore, the oil circuit drive assembly further comprises a throttling device, both ends of which are connected to the first chamber and the drive oil control device respectively; wherein the throttling device is used to measure the flow rate of the drive oil; Furthermore, the oil circuit drive assembly further includes a one-way valve, which is arranged in parallel with the throttling device; the passage direction of the one-way valve points to the drive oil control device.

4. The active filling valve structure according to claim 1, wherein: A piston cavity is provided inside the piston member, a piston spring is provided inside the piston cavity, and two ends of the piston spring are respectively connected to the piston member and the first chamber; wherein the direction of the elastic force of the piston spring is toward a direction away from the oil inlet hole.

5. The active filling valve structure according to claim 4, characterized in that: A first groove is provided in an annular manner on the outer side of the piston member. A first sealing ring is installed in the first groove. The first sealing ring is sealed and fitted with the inner side of the driving chamber.

6. The active filling valve structure according to claim 1, wherein: A valve core cavity is provided inside the valve core component, a valve core spring is provided inside the valve core cavity, and both ends of the valve core spring are respectively connected to the valve core component and the piston component; wherein the direction of the elastic force of the valve core spring is toward the direction away from the oil inlet hole.

7. The active filling valve structure according to claim 6, characterized in that: A plurality of oil through holes are formed on the side of the valve core member, and the oil through holes are connected with the oil delivery chamber and the inner cavity of the valve core.

8. The active filling valve structure according to claim 1, wherein: A guide sleeve is fixedly provided inside the valve body, and the guide sleeve is located between the oil delivery chamber and the drive chamber; a guide hole is provided through the middle of the guide sleeve, and at least part of the valve core member and at least part of the piston member are slidably connected to the guide hole.

9. The active filling valve structure according to claim 8, characterized in that: The outer side of the guide sleeve is provided with a second groove in an annular shape, and a second sealing ring is installed in the second groove. The second sealing ring is sealed and fitted with the inner side of the valve body.

10. The active filling valve structure according to claim 8, wherein: A plurality of third grooves are annularly arranged on the outer side of the valve core member and / or the piston member, and the plurality of third grooves are distributed at intervals along the axis of the guide hole.

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