Plug-in mounting type pilot normally-closed electromagnetic valve

Abstract

The utility model belongs to the technical field of electromagnetic valves, and particularly relates to a plug-in type pilot normally-closed electromagnetic valve which comprises a shell framework, the shell framework is of a hollow structure, an iron core assembly is installed in the shell framework in a sliding mode, a shell is arranged at one end of the shell framework, and the shell framework is connected with the shell. The electromagnet is sleeved outside the shell framework and generates electromagnetic force after being electrified to attract the iron core assembly mounted in the shell framework to move backwards; the valve element limiting ring is installed between the shell and the shell framework, and the head of the iron core assembly penetrates into the valve element limiting ring. The valve element assembly is arranged in the shell in a sliding mode, a tip cone of the iron core assembly makes contact with the sharp edge of the tail portion of an oil passing hole in the middle of the valve element assembly, and communication between the oil supply port and the load port is controlled by controlling movement of the valve element assembly and the iron core assembly through on-off of the electromagnet. The device has the characteristics of long service life, high reliability and simplicity in installation and debugging.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of solenoid valve, especially relates to a plug-in type pilot normally closed solenoid valve. BACKGROUND

[0002] As a kind of key control element, solenoid valve has indispensable effect in industrial automation and hydraulic control field. With the rapid development of wisdom hydraulic and digital hydraulic technology, solenoid valve has been widely applied and developed, and becomes the indispensable important component in modern work control system and automated production line. Therefore, solenoid valve with the characteristics of fast response, high flow requirement and low internal leakage can occupy dominant position in increasingly fierce market competition. When solenoid valve is designed and developed currently, complex force balance calculation is needed, which leads to long design cycle, in addition, the assembly process of solenoid valve designed by complex calculation is also quite complex, seriously affects the production cycle of solenoid valve, based on this, the utility model develops a plug-in type solenoid valve, which can be widely used in industrial automation and hydraulic control field. SUMMARY

[0003] The technical problem solved by the utility model: the technical problem to be solved by the utility model is that complex force balance calculation is encountered in the design process of solenoid valve, and a plug-in type pilot normally closed solenoid valve with long service life, high reliability and simple installation and debugging is provided.

[0004] The technical scheme of the utility model

[0005] A plug-in type pilot normally closed solenoid valve, comprising:

[0006] The shell skeleton is a hollow structure, and the iron core assembly is slidably installed inside, the shell is arranged at one end of the shell skeleton, and the shell skeleton is connected with the shell;

[0007] The electromagnet is sleeved outside the shell skeleton, and generates electromagnetic force to attract the iron core assembly installed inside the shell skeleton to move backward after being electrified;

[0008] The valve core limiting ring is installed between the shell and the shell skeleton, and the head of the iron core assembly penetrates into the valve core limiting ring;

[0009] The valve core assembly is slidably arranged inside the shell, the top cone of the iron core assembly is in contact with the tail edge of the middle oil passage of the valve core assembly, and the communication between the oil supply port and the load port is controlled by controlling the movement of the valve core assembly and the iron core assembly by the on-off control of the electromagnet.

[0010] Further, the shell skeleton comprises rear magnetic yoke, magnetic ring and front magnetic yoke connected in sequence, the rear magnetic yoke, magnetic ring and front magnetic yoke are coaxially arranged, and the rear magnetic yoke, magnetic ring and front magnetic yoke are provided with coaxial through holes inside, for installing the iron core assembly.

[0011] Further, the tail fixing head is arranged at the rear end of the front magnetic yoke, is screwed on the rear end of the front magnetic yoke, and is internally provided with a mounting hole for mounting the rear end of the supporting rod of the iron core assembly.

[0012] Further, the spring is sleeved on the supporting rod of the iron core assembly, one end of the spring is in contact with the iron core assembly, and the other end of the spring is in contact with the front magnetic yoke.

[0013] Further, the valve core limiting ring is internally provided with a step, and the step is matched with the head end surface of the valve core assembly to limit the valve core assembly.

[0014] Further, the valve core limiting ring, the shell and the rear magnetic yoke are made of the same material, so that the deformation amounts at high and low temperatures are consistent, and the jamming phenomenon at high and low temperatures is avoided.

[0015] Further, the valve core assembly comprises a valve core, a steel ball and a cylindrical elastic check ring, the valve core is slidably arranged in the shell, the valve core comprises three oil passages, namely a middle oil passage and oil passages arranged on both sides of the middle oil passage, one steel ball and one cylindrical elastic check ring are arranged in each oil passage.

[0016] Advantages

[0017] The utility model provides a kind of plug-in type pilot normally closed electromagnetic valve, the plug-in type electromagnetic valve, simplify electromagnetic force, spring force, hydraulic pressure calculation problem in the design process of electromagnetic valve.The plug-in type electromagnetic valve can control the rated oil supply flow under the rated pressure of product.The plug-in type electromagnetic valve simplifies working step, reduces workload, thereby greatly reduces the cost of repeated debugging and research. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is structural schematic diagram of the utility model.

[0019] Figure 2 It is shell skeleton assembly schematic diagram.

[0020] Figure 3 It is valve core limiting ring amplification schematic diagram.

[0021] Figure 4 It is valve core assembly schematic diagram. DETAILED DESCRIPTION

[0022] The features and illustrative embodiments of each aspect of the present application will be described below in detail. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without some or all of these specific details. The following description of the embodiments is merely exemplary in nature and is provided to give a better understanding of the present application. The present application as described herein is not limited to the following any specific arrangements and methods, but covers any improvements, replacements and modifications of the structure, method and device without departing from the spirit of the present application. In the accompanying drawings and the following description, well-known structures and techniques are not shown in order to avoid unnecessary obscuring of the present application.

[0023] It should be noted that the features of the embodiments of the present application and the embodiments can be combined with each other without conflict, and each embodiment can be mutually referenced and quoted. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0024] The utility model provides a kind of plug-in type pilot normally closed electromagnetic valve including shell skeleton assembly 1, core assembly 2, valve core limit ring 3, valve core assembly 4, steel ball 5, electromagnet 6, cylindrical elastic baffle 10, shell 11, fixed nut 12, tail fixed head 13.

[0025] Shell skeleton is by front magnetic yoke 7, magnetic ring 8, rear magnetic yoke 9, three kinds of parts are welded together after rough machining, then carry out the processing of inner hole, ensure the roundness, straightness etc. of shell skeleton 1 inner hole, while since precision size is processed after welding, greatly improve the strength of shell assembly 1, improve the service life and reliability of electromagnetic valve. Tail fixed head 13 is provided at the rear end of front magnetic yoke 7, tail fixed head 13 is installed at the rear end of front magnetic yoke 7 by screw thread, and mounting hole is provided in the inside, for installing the rear end of core assembly 2.

[0026] Core assembly 2 is slidably installed in the inside of shell skeleton assembly 1, electromagnet 6 is installed outside shell skeleton 1, spring sleeve is connected on the support rod of core assembly 2, one end of spring is in contact with core assembly 2, and the other end is in contact with front magnetic yoke 7. Electromagnetic force is generated when energized to attract core assembly 2 in the inside of shell skeleton assembly 1 to overcome spring force to move backward, so that oil supply port P is communicated with load port T.

[0027] The valve core limiting ring 3 is installed between the valve core assembly 4 and the shell skeleton 1, and the head of the iron core assembly 2 penetrates into the valve core limiting ring 3. At this time, the valve core limiting ring 3 makes the sharp edge of the middle oil passage hole in the valve core assembly 4 separate from the head of the iron core assembly 2, so as to ensure that the oil supply port P communicates with the load port T. When the electromagnetic is powered off, the head of the iron core assembly 2 will contact the sharp edge of the middle oil passage hole in the valve core assembly 4, thereby changing the stress condition of the two ends of the valve core assembly 4, so that the valve core assembly 4 moves forward to disconnect the oil supply port P and the load port T.

[0028] The valve core limiting ring 3 is made of the same material as the shell 11 and the valve core assembly 2, so that the deformation amount at high and low temperatures remains consistent, avoiding the phenomenon of jamming at high and low temperatures, and improving the working reliability of the electromagnetic valve.

[0029] The use of the valve core limiting ring 3 simplifies the calculation of electromagnetic force, spring force and hydraulic pressure in the design process of the electromagnetic valve, and the valve core limiting ring 3 is used to realize the on-off function of the oil supply and load.

[0030] The valve core limiting ring 3 is processed in a ring step size mode, and a step is arranged inside to cooperate with the head end surface of the valve core assembly 2, limit the valve core assembly 2, control the displacement of the valve core assembly 4, change the rated oil supply flow under the rated pressure of the product, and again simplify the calculation of electromagnetic force, spring force and hydraulic pressure in the design process of the electromagnetic valve. Simplify the working steps and reduce the workload, thereby greatly reducing the cost of repeated debugging and research.

[0031] The valve core assembly 2 includes a valve core, a steel ball 5 and a cylindrical elastic retainer 10. The valve core is slidably arranged in the shell 11, and the valve core includes three oil passage holes, including a middle oil passage hole and oil passage holes arranged on both sides of the middle oil passage hole. Each oil passage hole is arranged with a steel ball 5 and a cylindrical elastic retainer 10.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, but the protection scope of the present application is not limited thereto. Any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered within the protection scope of the present application.

Claims

1. A cartridge type pilot normally closed electromagnetic valve characterized by comprising: The utility model relates to a kind of electromagnetic valve, including: Shell skeleton, shell skeleton is hollow structure, inside sliding installation iron core assembly, shell is arranged at shell skeleton one end, shell skeleton is connected with shell; Electromagnet cover is outside shell skeleton, generates electromagnetic force after energization and attracts iron core assembly installed in shell skeleton to move back; Valve core limiting ring is installed between shell and shell skeleton, and the head of iron core assembly penetrates into valve core limiting ring; Valve core assembly is slidably arranged in shell, and the top cone of iron core assembly is in contact with the tail edge of middle oil passage of valve core assembly, and the movement of valve core assembly and iron core assembly is controlled by the on-off control of electromagnet to control the communication of oil supply port and load port.

2. A cartridge type pilot normally closed electromagnetic valve as recited in claim 1, characterized by Shell skeleton includes rear magnetic yoke, magnetic ring and front magnetic yoke connected in sequence, rear magnetic yoke, magnetic ring and front magnetic yoke are coaxially arranged, and coaxial through holes are arranged in rear magnetic yoke, magnetic ring and front magnetic yoke for installing iron core assembly.

3. A cartridge-mounted pilot normally closed solenoid valve as defined in claim 2, characterized by Tail fixed head is arranged at the rear end of front magnetic yoke, tail fixed head is screwed at the rear end of front magnetic yoke, and mounting hole is arranged in tail fixed head for installing rear end of support rod of iron core assembly.

4. A cartridge type pilot normally closed electromagnetic valve as set forth in claim 3, characterized in that Spring is also included, spring is sleeved on support rod of iron core assembly, one end of spring is in contact with iron core assembly, and the other end is in contact with front magnetic yoke.

5. The cartridge-mounted pilot normally closed solenoid valve of claim 1 wherein, Valve core limiting ring is arranged with step inside, and end surface of valve core assembly head is matched, so as to limit valve core assembly.

6. A cartridge type pilot normally closed electromagnetic valve as recited in claim 4, wherein Valve core limiting ring, shell and rear magnetic yoke are made of same material, so that deformation amount at high and low temperature remains consistent, and sticking phenomenon at high and low temperature is avoided.

7. The cartridge-mounted pilot normally closed solenoid valve of claim 1 wherein, Valve core assembly includes valve core, steel ball and cylindrical elastic retainer, valve core is slidably arranged in shell, valve core includes three oil passages, i.e. middle oil passage and oil passages arranged on both sides of middle oil passage, one steel ball and one cylindrical elastic retainer are arranged in each oil passage.

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