High-precision flow-stopping filling head structure

Abstract

The utility model provides a high-precision flow-stopping filling head structure which comprises a shell assembly, a piston assembly, an elastic piece and an electromagnetic driving assembly, the shell assembly is provided with a medium inlet and a medium outlet, and a channel is arranged between the medium inlet and the medium outlet to communicate the medium inlet and the medium outlet; the piston assembly is movably arranged in the channel, a blocking head is arranged at the end, close to the medium outlet, of the piston assembly, and a magnetic conduction part is further arranged on the piston assembly. The elastic prestressing force is applied to the piston assembly through the elastic piece, so that in the initial state, the blocking head on the piston assembly can block the medium outlet, and the medium is effectively prevented from flowing out; when filling is needed, the electromagnetic driving assembly is powered on, so that the electromagnetic driving assembly generates a magnetic field to drive the magnetic conduction part to move, the piston assembly resists the elastic force of the elastic piece to be away from the medium outlet, and the medium outlet is opened to achieve medium filling.

Description

Technical Field

[0001] The utility model relates to the technical field of filling equipment, in particular to a high-precision flow-stop filling head structure. Background Art

[0002] In the field of filling, the filling head is generally connected to a power device (such as a pump) through a pipeline. The power device transports the medium to the filling head, and the filling head is connected to the container to be filled. When the filling is completed, even if the power device is turned off, after the filling head is pulled out from the container to be filled, the medium will flow out of the filling head, causing medium loss or medium pollution of the environment. Utility Model Content

[0003] In view of this, the utility model proposes a high-precision flow-stop filling head structure, which can solve the problem of medium outflow in the above-mentioned filling head.

[0004] The technical solution of the utility model is achieved in this way:

[0005] A high-precision flow-stop filling head structure, comprising:

[0006] A housing component, wherein the housing component has a medium inlet and a medium outlet, and a channel is provided between the medium inlet and the medium outlet for communication;

[0007] A piston assembly is movably disposed in the passage, a plug is provided at one end of the piston assembly close to the medium outlet, and a magnetic conductive portion is also provided on the piston assembly;

[0008] An elastic member, which is disposed in the housing assembly and applies an elastic preload to the piston assembly close to the medium outlet, so that the plugging head blocks the medium outlet in an initial state;

[0009] An electromagnetic drive component is disposed on the housing component, and the electromagnetic drive component is configured to generate a magnetic field that drives the magnetic conductive portion to move in a direction away from the medium outlet.

[0010] As a further optional solution of the high-precision flow-stop filling head structure, the piston assembly includes:

[0011] A push rod, wherein the push rod is tubular;

[0012] A tubular moving core, which is made of soft magnetic material and is disposed at the first end of the push rod; the tubular moving core serves as the magnetic conductive part;

[0013] A plugging head mounting component, wherein the plugging head mounting component is arranged at the second end of the push rod, the plugging head is arranged on the plugging head mounting component, and a drainage hole is arranged outside the plugging head mounting component, and the drainage hole is communicated with the inside of the push rod.

[0014] As a further optional solution of the high-precision flow-stop filling head structure, one end of the plugging head mounting component is provided with an embedding hole for the plugging head to be embedded.

[0015] As a further optional solution for the high-precision flow-stop filling head structure, there is an interference fit between the plugging head mounting component and the push rod, and there is an interference fit between the push rod and the tubular moving core.

[0016] As a further optional solution of the high-precision flow-stop filling head structure, a first supporting portion is provided on the plugging head mounting component;

[0017] A second supporting portion is provided in the channel;

[0018] The elastic member is a spring, and the spring is sleeved on the piston assembly. One end of the spring abuts against the first supporting portion, and the other end abuts against the second supporting portion.

[0019] As a further optional solution of the high-precision flow-stop filling head structure, the electromagnetic drive assembly includes:

[0020] A fixing frame, wherein a guide hole is provided in the fixing frame for the piston assembly to pass through, and the magnetic conductive part on the piston assembly is located in the guide hole;

[0021] A coil support, wherein the coil support is arranged outside the fixing frame;

[0022] The coil is wound on the coil support.

[0023] As a further optional solution of the high-precision flow-stop filling head structure, the housing assembly includes:

[0024] An external tube, the passage is formed in the external tube, the piston assembly moves axially in the external tube, and the fixing frame is arranged on the external tube;

[0025] A lower end tube, the lower end tube is arranged at one end of the external tube, the lower end tube is sealed and connected to the external tube, the two ends of the lower end tube are respectively provided with a first opening and a second opening, a liquid outlet cavity is provided between the first opening and the second opening, the piston assembly is penetrated on the first opening, and the plug is located in the liquid outlet cavity;

[0026] A connector is threadedly connected to the second opening, and the medium outlet is arranged on the connector.

[0027] As a further optional solution of the high-precision flow-stop filling head structure, a protective shell is provided outside the coil support.

[0028] As a further optional solution of the high-precision flow-stop filling head structure, the housing assembly further includes:

[0029] A pipe joint is connected to a fixing frame, the medium inlet is formed on the pipe joint, the pipe joint is sealed and connected to the fixing frame, and the medium inlet is connected to a guide hole on the fixing frame.

[0030] As a further optional solution of the high-precision flow-stop filling head structure, the plugging head is a rubber piece.

[0031] The beneficial effects of the utility model are as follows: elastic pre-force is applied to the piston assembly by the elastic member, so that in a natural state, the plugging head on the piston assembly can block the medium outlet and effectively prevent the medium from flowing out; when filling is required, the electromagnetic drive assembly is energized so that the electromagnetic drive assembly generates a magnetic field to drive the magnetic conductive part to move, so that the piston assembly resists the elastic force of the elastic member and moves away from the medium outlet, so that the medium outlet is opened to realize the filling of the medium.

[0032] Other optional purposes and advantages of the present invention are fully reflected through the following specific implementation methods and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 This is a structural schematic diagram of a high-precision flow-stop filling head structure of the utility model;

[0035] Figure 2 It is a cross-sectional view of a high-precision flow-stop filling head structure of the utility model;

[0036] Figure 3 It is an exploded schematic diagram of a high-precision flow-stop filling head structure of the utility model;

[0037] Figure 4 for Figure 2 A magnified view of middle;

[0038] Figure 5 for Figure 2 Enlarged view of middle B;

[0039] Figure 6 It is a cross-sectional schematic diagram of the plug installation component.

[0040] In the figure: 1, housing assembly; 11, medium inlet; 12, medium outlet; 13, channel; 14, external pipe; 15, lower end pipe; 151, first opening; 152, second opening; 153, liquid outlet cavity; 16, connector; 17, pipe joint; 18, second support portion;

[0041] 2. Piston assembly; 21. Push rod; 22. Tube-type moving core; 23. Plug head mounting member; 231. Drain hole; 232. Embedding hole; 233. First supporting portion; 24. Plug head;

[0042] 3. Elastic parts;

[0043] 4. Electromagnetic drive assembly; 41. Fixing frame; 411. Guide hole; 42. Coil bracket; 43. Coil; 44. Protective shell. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. 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.

[0045] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0046] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0048] refer to Figure 1-6 An embodiment of the present application shows a high-precision flow-stop filling head structure, including a shell component 1, a piston component 2, an elastic member 3 and an electromagnetic drive component 4; the shell component 1 has a medium inlet 11 and a medium outlet 12, and a channel 13 is provided between the medium inlet 11 and the medium outlet 12 for communication; the piston component 2 is movably arranged in the channel 13, and a plugging head 24 is provided at one end of the piston component 2 close to the medium outlet 12, and a magnetic conductive part is also provided on the piston component 2; the elastic member 3 is arranged in the shell component 1 and applies an elastic pre-force close to the medium outlet 12 to the piston component 2, so that the plugging head 24 blocks the medium outlet 12 in the initial state; the electromagnetic drive component 4 is arranged on the shell component 1, and the electromagnetic drive component 4 is configured to generate a magnetic field that drives the magnetic conductive part to move away from the medium outlet 12.

[0049] In the present embodiment, elastic pre-force is applied to the piston assembly 2 by the elastic member 3, so that in the initial state, the plugging head 24 on the piston assembly 2 can block the medium outlet 12, effectively preventing the medium from flowing out; when filling is required, the electromagnetic drive assembly 4 is energized so that the electromagnetic drive assembly 4 generates a magnetic field to drive the magnetic conductive part to move, so that the piston assembly 2 resists the elastic force of the elastic member 3 and moves away from the medium outlet 12, so that the medium outlet 12 is opened to realize the filling of the medium.

[0050] It can be understood that the electromagnetic drive component 4 should be connected to a power supply, such as a battery, AC power, etc.; and the way to power the battery drive component can be to set a switch to control power on and power off; when the electromagnetic drive component 4 is powered on, the medium outlet 12 is opened; when the electromagnetic drive component 4 is powered off, the elastic member 3 causes the plug 24 to block the medium outlet 12.

[0051] It is understandable that the housing assembly 1 may be an integrated structure or an assembled structure composed of multiple parts.

[0052] It is understandable that the medium may be liquid, gas or a mixture of gas and liquid.

[0053] In some embodiments, the housing assembly 1 is configured in a long strip shape so as to be applied to a container to be filled having an elongated or small-diameter inlet;

[0054] In these embodiments, reference Figure 2 , Figure 4 and Figure 5 The piston assembly 2 includes a push rod 21, a tubular moving core 22 and a plugging head mounting component 23. The push rod 21 is tubular and can be adapted and set according to a preset length of the piston assembly 2; the tubular moving core 22 is made of soft magnetic material and is arranged at the first end of the push rod 21; the tubular moving core 22 serves as a magnetic conductive part; the plugging head mounting component 23 is arranged at the second end of the push rod 21, and the plugging head 24 is arranged on the plugging head mounting component 23. A drainage hole 231 is provided outside the plugging head mounting component 23, and the drainage hole 231 is communicated with the inside of the push rod 21.

[0055] Specifically, the interior of the piston assembly 2 can allow the medium to flow through. For example, the medium can enter the housing assembly 1 from the medium inlet 11 and then flow into the tubular moving core 22, and then enter the interior of the piston assembly 2 from the tubular moving core 22. The medium flows through the push rod 21 into the plug head mounting member 23 and leaves the piston assembly 2 from the drain hole 231. In addition, in order to facilitate the installation of the plug head 24, refer to Figure 6 One end of the plug mounting member 23 is provided with an embedding hole 232 for the plug 24 to be embedded. The plug 24 can be made of rubber to ensure that the plug 24 has good sealing performance when squeezing the medium outlet 12.

[0056] In addition, for the convenience of manufacturing, the plug head mounting component 23 and the push rod 21 are interference fit, and the push rod 21 and the tubular moving core 22 are interference fit. Of course, conventional connection methods such as threaded connection, bonding, and welding can also be used. Among them, the interference fit used in this embodiment can achieve a sealed connection between the plug head mounting component 23 and the push rod 21, and a sealed connection between the push rod 21 and the tubular moving core 22, while avoiding the risk of contaminating the medium caused by the use of adhesives and other methods; relative to the threaded connection method, this embodiment can avoid the complexity of processing threads; relative to the welding method, this embodiment can make it possible to seal the plug head mounting component 23, the push rod 21, and the tubular moving core 22 when they are made of different materials.

[0057] It is understandable that the tubular moving core 22 does not have to be arranged at one end of the push rod 21. For example, the tubular moving core 22 can also be fixedly sleeved on the outside of the push rod 21; but the tubular moving core 22 is arranged at one end of the push rod 21, which can be more convenient for disassembly and replacement.

[0058] In some embodiments, to facilitate the setting of the elastic member 3, a first support portion 233 is provided on the plug mounting member 23, a second support portion 18 is provided in the channel 13, the elastic member 3 is a spring, and the spring is sleeved on the piston assembly 2, one end of the spring abuts against the first support portion 233, and the other end abuts against the second support portion 18.

[0059] It can be understood that the first support portion 233 and the second support portion 18 are used to provide force support points for the spring. The first support portion 233 can be a protrusion or step structure on the plug mounting component 23, and the second support portion 18 can be a protrusion or step structure fixedly arranged in the channel 13.

[0060] It is understandable that in other embodiments, the elastic member 3 may also be a spring, a tension spring or other parts, as long as it can apply an elastic pre-force close to the medium outlet 12 to the piston assembly 2 .

[0061] In some embodiments, reference Figure 3 and Figure 4 The electromagnetic drive assembly 4 includes a fixed frame 41, a coil support 42 and a coil 43. The fixed frame 41 is provided with a guide hole 411 for the piston assembly 2 to pass through. The tubular moving core 22 on the piston assembly 2 is located in the guide hole 411. The coil support 42 is arranged outside the fixed frame 41, and the coil 43 is wound on the coil support 42. Among them, the working principle of the electromagnetic drive assembly 4 to generate a magnetic field when it is energized is the existing technology, so it will not be repeated here.

[0062] It can be understood that the magnitude of the current affects the force of the electromagnetic drive assembly 4 to drive the magnetic conductive part to move, thereby affecting the size of the gap between the plugging head 24 and the medium outlet 12, thereby adjusting the filling injection pressure.

[0063] Preferably, reference Figure 4 The outer shell of the coil support 42 is provided with a protective shell 44 to protect the coil 43 and the coil support 42; it can be understood that an opening (not shown) can be provided on the protective shell 44 to realize the wiring and power supply of the coil 43 and the coil support 42.

[0064] In some embodiments, for ease of manufacture and assembly, reference Figure 3 , Figure 4 and Figure 5The housing assembly 1 includes an external tube 14, a lower end tube 15 and a connector 16; the channel 13 is formed in the external tube 14, the piston assembly 2 is configured to be movable axially in the external tube 14, and the fixing frame 41 is arranged on the external tube 14; the lower end tube 15 is arranged at one end of the external tube 14, and the lower end tube 15 is sealed and connected with the external tube 14 to prevent the medium from leaking from between the lower end tube 15 and the external tube 14, and the two ends of the lower end tube 15 are respectively provided with a first opening 151 and a second opening 152, and a liquid outlet cavity 153 is provided between the first opening 151 and the second opening 152, the piston assembly 2 is penetrated on the first opening 151, and the plug 24 is located in the liquid outlet cavity 153; the connector 16 is threadedly connected to the second opening 152, and the medium outlet 12 is arranged on the connector 16.

[0065] The external tube 14 makes the housing assembly 1 as a whole long and narrow, and the arrangement of the connector 16 and the lower end tube 15 makes the diameter of the medium outlet 12 smaller than the diameter of the external tube 14, so that the piston assembly 2 moving in the external tube 14 can block the medium outlet 12;

[0066] In addition, the first opening 151, the second opening 152 and the liquid outlet cavity 153 formed on the lower end tube 15 can facilitate the installation of the piston assembly 2 and the elastic member 3. Figure 5 As shown, the inner wall of the end of the liquid outlet cavity 153 near the first opening 151 can serve as the second support portion 18, the piston assembly 2 and the elastic member 3 can pass through the second opening 152, the elastic member 3 abuts against the second support portion 18, and the piston assembly 2 further passes through the first opening 151, as shown in FIG. Figure 6 As shown, the elastic member 3 abuts against the first support portion 233 on the plugging head mounting member 23, so that the plugging head mounting member 23 cannot pass through the first opening 151; and the connecting head 16 is arranged in the second opening 152, which can block the piston assembly 2 and prevent the piston assembly 2 from leaving the external tube 14;

[0067] It can be understood that the piston assembly 2 is inserted into the guide hole 411 and the first opening 151, and the guide hole 411 and the first opening 151 radially limit the piston assembly 2 to improve the stability of the piston assembly 2 when it moves axially; it can be understood that there can be a gap between the guide hole 411 and the piston assembly 2, and between the first opening 151 and the piston assembly 2. When the gap is smaller, the stability of the piston assembly 2 along the axial movement is higher, and the medium can enter the liquid outlet chamber 153 from the gap between the first opening 151 and the piston assembly 2 and then be discharged from the medium outlet 12.

[0068] It is understandable that the fixing bracket 41 may be disposed at one end of the external tube 14 , or may be fixedly sleeved on the external tube 14 .

[0069] It is understandable that the lower end pipe 15 is sealed to the connector 16 to prevent leakage of the medium therebetween. In addition, the lower section pipe and the external pipe 14 may be connected by conventional connection structures such as interference fit, threaded connection, bonding, welding, etc., as long as they are sealed and relatively fixed.

[0070] In some embodiments, reference Figure 1 , Figure 2 and Figure 4 The housing assembly 1 further includes a pipe joint 17, which is connected to the fixing frame 41. The medium inlet 11 is formed on the pipe joint 17. The pipe joint 17 and the fixing frame 41 are sealed to prevent the medium from leaking from between the pipe joint 17 and the fixing frame 41. The medium inlet 11 is connected to the guide hole 411 on the fixing frame 41. The pipe joint 17 can be connected to a pipeline so as to be connected to an external power device.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-precision stop-flow filling head structure, characterized in that: include: A housing component, wherein the housing component has a medium inlet and a medium outlet, and a channel is provided between the medium inlet and the medium outlet for communication; A piston assembly is movably disposed in the passage, a plug is provided at one end of the piston assembly close to the medium outlet, and a magnetic conductive portion is also provided on the piston assembly; An elastic member, which is disposed in the housing assembly and applies an elastic preload to the piston assembly close to the medium outlet, so that the plugging head blocks the medium outlet in an initial state; An electromagnetic drive component is disposed on the housing component, and the electromagnetic drive component is configured to generate a magnetic field that drives the magnetic conductive portion to move in a direction away from the medium outlet.

2. The high-precision flow-stop filling head structure according to claim 1 is characterized in that: The piston assembly comprises: A push rod, wherein the push rod is tubular; A tubular moving core, which is made of soft magnetic material and is disposed at the first end of the push rod; the tubular moving core serves as the magnetic conductive part; A plugging head mounting component, wherein the plugging head mounting component is arranged at the second end of the push rod, the plugging head is arranged on the plugging head mounting component, and a drainage hole is arranged outside the plugging head mounting component, and the drainage hole is communicated with the inside of the push rod.

3. The high-precision flow-stop filling head structure according to claim 2 is characterized in that: One end of the plug mounting component is provided with an embedding hole for the plug to be embedded.

4. The high-precision flow-stop filling head structure according to claim 3 is characterized in that: An interference fit is formed between the plug head mounting component and the push rod, and an interference fit is formed between the push rod and the tubular moving core.

5. The high-precision flow-stop filling head structure according to claim 2 is characterized in that: The plugging head mounting member is provided with a first supporting portion; A second supporting portion is provided in the channel; The elastic member is a spring, and the spring is sleeved on the piston assembly. One end of the spring abuts against the first supporting portion, and the other end abuts against the second supporting portion.

6. The high-precision flow-stop filling head structure according to any one of claims 1 to 5, characterized in that: The electromagnetic drive assembly comprises: A fixing frame, wherein a guide hole is provided in the fixing frame for the piston assembly to pass through, and the magnetic conductive part on the piston assembly is located in the guide hole; A coil support, wherein the coil support is arranged outside the fixing frame; The coil is wound on the coil support.

7. The high-precision flow-stop filling head structure according to claim 6 is characterized in that: The housing assembly comprises: An external tube, the passage is formed in the external tube, the piston assembly moves axially in the external tube, and the fixing frame is arranged on the external tube; A lower end tube, the lower end tube is arranged at one end of the external tube, the lower end tube is sealed and connected to the external tube, the two ends of the lower end tube are respectively provided with a first opening and a second opening, a liquid outlet cavity is provided between the first opening and the second opening, the piston assembly is penetrated on the first opening, and the plug is located in the liquid outlet cavity; A connector is threadedly connected to the second opening, and the medium outlet is arranged on the connector.

8. The high-precision flow-stop filling head structure according to claim 7 is characterized in that: A protective shell is arranged outside the coil support.

9. The high-precision flow-stop filling head structure according to claim 8 is characterized in that: The housing assembly further comprises: A pipe joint is connected to a fixing frame, the medium inlet is formed on the pipe joint, the pipe joint is sealed and connected to the fixing frame, and the medium inlet is connected to a guide hole on the fixing frame.

10. The high-precision flow-stop filling head structure according to claim 7, characterized in that: The plugging head is a rubber piece.

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