Valve element assembly and electromagnetic valve

Abstract

The utility model relates to the technical field of electromagnetic valves, and particularly discloses a valve element assembly and an electromagnetic valve. The valve element assembly comprises a shell, the shell comprises a guide pipe and a static iron core, and the static iron core is connected to the upper portion of the guide pipe. A limiting pipe is arranged in the static iron core, and the limiting pipe is in clearance fit with the static iron core. The electromagnetic valve comprises a driving shell assembly; the valve element assembly serves as an independent part and is fixedly connected with the driving shell assembly. The device has the advantages of being good in product production controllability, low in defective rate, high in product metering precision, good in product metering quality and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to solenoid valve technical field, concretely relates to valve core subassembly, solenoid valve. BACKGROUND

[0002] Solenoid valve is a kind of device using electromagnetic force to control valve opening and closing, by controlling the on-off and size of electric current, the flow and injection time of fuel can be accurately controlled.The current process route of solenoid valve is to assemble main parts into complete solenoid valve first, then carry out relevant debugging and detection and other related operations, the following problems are found in the production process of traditional above-mentioned scheme:1, debugging accuracy is difficult to accurately control, the rate of defective products is higher, such as lift debugging section (lift is the extremely small interval between static iron core and moving iron core), during the travel process of ejector rod pushing limiting tube, because the accurate control of torque cannot be achieved, therefore, limiting tube is easily pushed out of position, current process is to rely on the interference fit of limiting tube and static iron core, thus causing product to be directly scrapped;2, there is difference between the flow control value after product delivery and the test value of product flow debugging section, because traditional process is dynamic flow and static flow adjustment before filter screen (limiting tube and static iron core adopt interference fit, need to use ejector rod to push larger, to prevent damage to filter screen) is assembled, i.e.the test value of product flow debugging section is the debugging value without filter screen, and actual working condition after use contains filter screen, further, the application performance (such as accurate metering) of product is affected;At the same time, without filter screen, debugging is also easy to cause foreign matter to flow into valve flow channel, causing product to be scrapped;3, after relevant debugging section is determined, enter welding section, it is also easy to appear deformation because of welding high temperature, further, lift value appears change. CONTENT OF UTILITY MODEL

[0003] In view of the above shortcomings, the utility model provides valve core subassembly, solenoid valve, adopts the difference from traditional technology and process route, to comprehensively solve the above technical problems.

[0004] To achieve the above purpose, the utility model adopts the following technical scheme:

[0005] Valve core subassembly, including shell, the shell includes guide pipe and static iron core, the upper portion of guide pipe is connected with static iron core;Limiting tube is arranged in static iron core, and limiting tube and static iron core are gap fit;Dynamic iron core and valve seat are arranged in guide pipe;Valve seat is arranged in the lower portion of guide pipe, spring is arranged between dynamic iron core and limiting tube;Valve is arranged in the lower end of dynamic iron core.

[0006] Optionally, the shell further includes connecting rod, the connecting rod is round tubular, and the lower end is combined in the upper portion of static iron core.

[0007] Optionally, a filter screen is combined with the upper end of the limiting tube.

[0008] Optionally, the filter screen is integrally formed with the limiting tube or formed as an integral structure.

[0009] Optionally, the valve seat and the guide tube are in interference fit.

[0010] Optionally, after static flow adjustment is completed, the valve seat and the guide tube are welded or glued.

[0011] Optionally, the static core is provided with a sink or a counterbore.

[0012] Optionally, after flow adjustment is completed, the limiting tube is fixed with the static core by riveting and / or gluing and / or welding.

[0013] Alternatively, after flow adjustment is completed, the filter screen is fixed with the static core by riveting and / or gluing and / or welding.

[0014] Alternatively, after flow adjustment is completed, the filter screen is fixed with the connecting rod by riveting and / or gluing and / or welding.

[0015] The electromagnetic valve comprises the valve core assembly and further comprises a drive housing assembly; the drive housing assembly is provided with an electromagnetic drive module for driving the valve core assembly.

[0016] Optionally, the middle part of the drive housing assembly is provided with a valve core assembly prefabricated insertion hole, and the valve core assembly is connected and fixed with the drive housing assembly as an independent component.

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] 1. The utility model discloses that the valve core assembly is assembled as an independent component, and the limiting tube is combined with the static core in clearance fit, so that the limiting tube can be adjusted up and down relative to the static core based on flow test value during dynamic flow adjustment, and the technical problems, such as product scrap due to the fact that the traditional interference fit cannot adjust the static core once the adjustment amount is too large, are solved.

[0019] 2、In the traditional process, the valve seat and the guide pipe part are first assembled with the driving shell assembly to form a preliminary assembly, and then enter the related flow adjustment section, (so it is not possible to implement the riveting section and then welding fixation), in the traditional process, after completing the adjustment section, the valve seat and the guide pipe are welded, and then the lift change problem occurs after welding, which leads to the problem of decline of product flow precision and other quality. In the present application, the valve seat can be riveted first, and then welded, which effectively prevents the lift change problem caused by high temperature after subsequent welding, and significantly improves the measurement accuracy of the final product. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description.

[0021] Figure 1 is a structural schematic view of the valve core assembly of the present application;

[0022] Figure 2 is a structural schematic view of the valve core assembly of the present application; Figure 1

[0023] Figure 3 is a structural schematic view of the driving shell assembly of the present application;

[0024] Figure 4 is a structural schematic view of the valve core assembly and the driving shell assembly of the present application. DETAILED DESCRIPTION

[0025] The technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0026] In the description of the present application, it should be explained that the terms "in", "front", "back", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the present application is used, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the present application.

[0027] ​In the description of the utility model, still need to explain, unless another explicit provision and limitation, term "arrangement", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be two elements inside the communication。For ordinary skilled person in the art, can understand the specific meaning of the above terms in the utility model according to specific circumstances.

[0028] Valve core assembly, as shown in Figure 1 The shell includes a guide tube 8 and a static core 2, the upper part of the guide tube 8 is connected with the static core 2;The static core 2 is provided with a limiting tube 7, the limiting tube 7 and the static core 2 are gap fit, that is, in subsequent flow adjustment, it is beneficial to control the up-down displacement adjustment of the limiting tube 7 relative to the static core 2;The guide tube 8 is provided with a dynamic core 4 and a valve seat 5;The valve seat 5 is arranged at the lower part of the guide tube 8, and the spring 3 is arranged between the dynamic core 4 and the limiting tube 7;The lower end of the dynamic core is provided with a valve, which is usually a ball valve.In this embodiment, the lower part of the valve seat 5 is provided with a hole sheet 9;Optionally, the shell further includes a connecting rod 1;The connecting rod 1 is in the form of a circular tube, and the lower end is combined with the upper part of the static core 2.It also includes a filter screen 6, which is combined with the upper end of the limiting tube 7.In this embodiment, the filter screen 6 is integrally formed with the limiting tube 7 or formed as an integral structure.The design can reduce the assembly process steps.By combining the filter screen 6 with the limiting tube 7, it can avoid foreign matter entering the flow channel during the related flow debugging process, and the traditional way is to press-fit the filter screen after dynamic flow and static flow adjustment, which can not simulate the actual application environment of the product (the actual application environment is with filter screen) before delivery.In this embodiment, in order to facilitate the riveting operation of the limiting tube 7 in the subsequent related section, a sink or counterbore can also be arranged on the upper part of the static core 2.

[0029] Optionally, the valve seat 5 and the guide tube 8 are interference fit.After completing the static flow adjustment, the valve seat and the guide tube are welded or glued.

[0030] After the flow rate adjustment is completed, the current position of the limiting tube 7 needs to be fixed. In some embodiments, the limiting tube 7 can be fixed to the stationary iron core by riveting and / or gluing and / or welding. In other embodiments, after the flow rate adjustment is completed, in order to fix the current position of the limiting tube 7, the filter screen can also be fixed to the stationary iron core by riveting and / or gluing and / or welding; or, after the flow rate adjustment is completed, the filter screen can be fixed to the connecting rod 1 by riveting and / or gluing and / or welding. In other embodiments, a combination of two or more of the above methods can be used for fixing.

[0031] Solenoid valves, such as Figures 3-4 As shown, the device includes the valve core assembly as described above, and also includes a drive housing assembly 10. The drive housing assembly 10 is provided with an electromagnetic drive module 12 for driving the valve core assembly. The electromagnetic drive module 12 is provided with a magnetic sleeve 13, and a pre-made insertion hole for the valve core assembly is provided in its middle. The valve core assembly is connected and fixed to the drive housing assembly as an independent component.

[0032] The technical advantages of adopting the above structure for production and processing are as follows: the valve core assembly processing method includes flow adjustment, and the flow adjustment includes dynamic flow adjustment.

[0033] S1: Fix the valve core assembly to the lift adjustment device;

[0034] S2: During the adjustment process, while testing the dynamic flow rate of the valve core assembly, the spring force of the spring is adjusted to adjust the dynamic flow rate (specifically, the spring force of the spring 3 is adjusted by pushing the limit tube 7 with the adjusting rod). If the dynamic flow rate test value is insufficient, the extension of the adjusting rod is increased; if the dynamic flow rate is over-adjusted, the retraction of the adjusting rod is controlled (in some embodiments, the spring force of the spring 3 can act in the opposite direction on the limit tube 7 to achieve the retraction of the limit tube 7; in some embodiments, the limit tube 7 can be actively lifted by the clamping component, that is, since the limit tube 7 is clearance fit, it is sufficient to control the retraction of the limit tube 7, all of which are within the scope of protection of this application), until the test value reaches the target flow rate, and then the adjusting rod is kept stationary. The advantage of this scheme is that it can simultaneously adjust the spring force of the spring 3 bidirectionally (i.e., adjust it to a large or small size) based on the dynamic flow rate test process, which is more flexible in adjustment and significantly improves the control accuracy compared with the existing process; it can eliminate the problem of direct scrapping due to the interference fit of the traditional limit tube 7 once over-adjustment occurs.

[0035] S3: Fix the limiting tube. During specific processing, it is preferable to use a rivet to rivet and fix the limiting tube at the dynamic flow riveting point, such as... Figure 2As shown, riveting can be performed at the sink or hole of the static core 2. In some embodiments, the fixing of the limiting tube can also use glueing, welding and the like to fix it, such as using glueing or resistance welding alone, or after riveting, glueing or welding and the like are combined to reinforce.

[0036] Or when a combined fixing scheme is adopted, the limiting tube 7 is fixed to the static core by riveting, and then the filter screen and the connecting rod 1 or the static core are fixed by glueing or welding and the like.

[0037] The flow adjustment further includes static flow adjustment,

[0038] After testing the static flow of the product, the target flow is compared, the step amount of the push electrode is adjusted according to the difference, the valve seat is pushed by the top rod to adjust the lift, the electrode stops working when the test value reaches the target flow, the valve seat is riveted and fixed at the static flow riveting point using a rivet needle, and then the valve seat and the guide pipe joint are welded or glued. The riveting process can avoid the technical problem that the lift changes due to the thermal stress deformation of the guide pipe after the valve seat and the guide pipe are welded.

[0039] When the flow adjustment is performed, the valve core assembly is assembled with the filter screen, so that the process in the flow adjustment section can realize full simulation of the actual application environment of the product, and the product metering accuracy is significantly improved.

[0040] The processing method of the electromagnetic valve, such as Figure 4 As shown, after the valve core assembly is assembled and the flow adjustment is completed, the valve core assembly component finished product is obtained, and then the valve core assembly component finished product and the driving shell assembly are assembled and fixed. When operating, the valve core assembly component finished product is pressed into the valve core assembly pre-insertion hole of the driving shell assembly by a related device, and then the connection and fixation mode can be glueing, glueing such as Figure 4 The J area shown in the figure, welding can also be performed, and the welding position can be Figure 4 The welding point 11 shown in the figure.

Claims

1. A valve trim assembly characterized by: The shell comprises a guide tube and a static core, the upper part of the guide tube is connected with the static core; a limiting tube is arranged in the static core, the limiting tube is in clearance fit with the static core; a dynamic core and a valve seat are arranged in the guide tube; the valve seat is arranged in the lower part of the guide tube, a spring is arranged between the dynamic core and the limiting tube; the lower end of the dynamic core is provided with a valve.

2. The valve trim assembly of claim 1, wherein: The shell further comprises a connecting rod, the connecting rod is in the shape of a circular tube, and the lower end of the connecting rod is combined with the upper part of the static core.

3. The valve trim assembly of claim 2, wherein: A filter screen is further included, and the filter screen is combined with the upper end of the limiting tube.

4. The valve core assembly according to claim 3, characterized in that: The filter screen is integrally formed with the limiting tube or is formed as an integral structure.

5. The valve trim assembly of claim 1, wherein: The valve seat is in interference fit with the guide tube.

6. The valve trim assembly of claim 1, wherein: After the static flow adjustment is completed, the valve seat and the guide tube are welded or glued.

7. The valve trim assembly of claim 1, wherein: The static core is provided with a sink or a counterbore.

8. The valve trim assembly of claim 3, wherein: After the dynamic flow adjustment is completed, the limiting tube is fixed with the static core through riveting and / or gluing and / or welding. Or, After the flow adjustment is completed, the filter screen is fixed with the static core through riveting and / or gluing and / or welding. Or, 9. Solenoid valve, characterized in that: After the flow adjustment is completed, the filter screen is fixed with the connecting rod through riveting and / or gluing and / or welding.

10. The solenoid valve according to claim 9, characterized in that: The valve core assembly comprises the valve core assembly as claimed in any one of claims 1 to 8, and further comprises a driving shell assembly; the driving shell assembly is provided with an electromagnetic driving module for driving the valve core assembly. The middle part of the driving shell assembly is provided with a valve core assembly prefabricated insertion hole, and the valve core assembly is connected and fixed with the driving shell assembly as an independent part.

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