Magnetic flux guide sleeve buckle press type electromagnetic valve

Abstract

The utility model discloses a kind of magnetic flux guide sleeve buckle pressure type electromagnetic valve, it includes magnetic flux guide pipe and main valve sleeve, magnetic flux guide pipe hollow forms inner chamber, main valve sleeve has axial through-hole, main valve sleeve upper portion is inserted into the inner chamber of magnetic flux guide pipe and is fixedly connected by buckling and magnetic flux guide pipe, the through-hole of main valve sleeve is equipped with cone valve core, cone valve core top is equipped with sealing surface, sealing surface is equipped with pilot cone valve core, the upper portion of pilot cone valve core is located in the inner chamber of magnetic flux guide pipe, the lower portion of pilot cone valve core is rested on sealing surface, spring B is wound on the outside of the lower portion of pilot cone valve core, the center and side wall of pilot cone valve core are all equipped with oil outlet hole, the upper portion of pilot cone valve core is equipped with armature, pilot cone valve core and armature are interference fit sealing structure, spring A is vertically arranged in the spring cavity of pilot cone valve core, one end of spring A is connected with the bottom surface of spring cavity, the other end of spring A is connected with the top surface of magnetic flux guide pipe inner chamber. The utility model greatly reduces the valve sticking probability of electromagnetic valve.

Description

Technical Field

[0001] This utility model belongs to the field of electromagnetic valve technology, specifically relating to a magnetic sleeve-type electromagnetic valve. Background Technology

[0002] like Figure 1 The diagram shows a cross-sectional view of a prior art electromagnetic cone valve, which includes a magnetic tube 1, a spring A2, an armature 3, a pilot valve core 4, a cone valve core 5, a spring B6, a main valve sleeve 7, and a sealing element. In the aforementioned electromagnetic cone valve, the T-slot at the front end of the armature 3 connects to the boss at the outer groove of the pilot valve core 4, resulting in a relatively large axial clearance. Furthermore, the electromagnetic cone valve achieves opening and closing by using electromagnetic force to move the armature 3.

[0003] The existing structure has high processing costs and overall valve response time. The technology requires a high degree of concentricity in the fit of parts. Otherwise, it is very easy for the threaded magnetic tube 1 and the main valve sleeve 7 to get stuck between the main valve sleeve 7 and the cone valve core 5 after torque tightening. Moreover, the coaxiality requirement between the main valve sleeve 7 and the magnetic tube 1 is also high. This is mainly because the existing technology connects the main valve sleeve 7 and the magnetic tube 1 through threads. There is a gap between the threads of the main valve sleeve 7 and the magnetic tube 1. After tightening, the perpendicularity and coaxiality of the main valve sleeve 7 and the magnetic tube 1 will exceed the tolerance, resulting in tilting or not being on the same center. After screwing in the test block, the probability of valve jamming will increase significantly, making it unable to operate and thus affecting the valve performance. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the prior art by providing a magnetic sleeve-type solenoid valve, which significantly reduces the probability of valve jamming by improving the connection method between the magnetic tube and the main valve sleeve.

[0005] The technical solution adopted in this utility model is as follows: A magnetic sleeve-type solenoid valve includes a magnetic tube and a main valve sleeve. The magnetic tube is hollow, forming an inner cavity. The main valve sleeve has an axial through hole. The upper part of the main valve sleeve extends into the inner cavity of the magnetic tube and is fixedly connected to the magnetic tube by clamping. A conical valve core is provided in the through hole of the main valve sleeve. A sealing surface is provided on the top of the conical valve core. The distance between the sealing surface and the top surface of the conical valve core is 1-2 mm. A pilot conical valve core is provided on the sealing surface. The upper part of the pilot conical valve core is located in the inner cavity of the magnetic tube, and the lower part of the pilot conical valve core abuts against the sealing surface. A spring B is wound on the outer side of the lower part of the pilot conical valve core. Oil outlet holes are opened at the center and side wall of the pilot conical valve core. An armature is provided on the upper part of the pilot conical valve core. The pilot conical valve core and the armature are sealed by an interference fit. A spring A is vertically provided in the spring cavity inside the pilot conical valve core. One end of the spring A is connected to the bottom surface of the spring cavity, and the other end of the spring A is connected to the top surface of the inner cavity of the magnetic tube.

[0006] Preferably, an annular groove is provided on the lower outer wall of the main valve sleeve, and a first O-ring is provided in the sealing sleeve inside the annular groove.

[0007] Preferably, the main valve sleeve is provided with a boss to facilitate the crimping of the magnetic tube.

[0008] Preferably, the distance between the sealing surface and the top surface of the cone valve core is 1.5mm.

[0009] Preferably, a second O-ring is fitted on the upper outer wall of the magnetic tube.

[0010] The beneficial effects of this utility model are as follows: (1) This utility model changes the connection between the main valve sleeve and the magnetic tube from the original threaded connection to a crimped connection. This crimped connection method has no limitations, making the installation of the cartridge valve more convenient and greatly reducing the probability of valve jamming between the main valve sleeve and the cone valve core. (2) The pilot cone valve core and the armature in this utility model are connected by an interference fit seal, which reduces the axial clearance of the solenoid valve, making the fit between the pilot cone valve core and the armature more perfect, the response time faster, and the performance better. Attached Figure Description

[0011] Figure 1 This is a cross-sectional view of the prior art; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a cross-sectional view of the cone valve core of this utility model; In the diagram: 1. Magnetic tube; 2. Spring A; 3. Armature; 4. Pilot cone valve core; 5. Spring B; 6. Cone valve core; 7. Main valve sleeve; 8. Sealing surface. Detailed Implementation

[0012] The present invention will be further described below with reference to the accompanying drawings: like Figure 2-3 As shown, this utility model discloses a magnetic sleeve crimping type solenoid valve, which includes a magnetic tube 1 and a main valve sleeve 7. The magnetic tube 1 is hollow to form an inner cavity, and the main valve sleeve 7 has an axial through hole. The upper part of the main valve sleeve 7 extends into the inner cavity of the magnetic tube 1 and is fixedly connected to the magnetic tube 1 by crimping. The main valve sleeve 7 is provided with a boss to facilitate crimping of the magnetic tube 1. This solenoid valve changes the connection method between the main valve sleeve 7 and the magnetic tube 1 from the original threaded connection to a crimping connection. The crimping connection method has no limitations, making the installation of the cartridge valve more convenient and greatly reducing the probability of valve jamming.

[0013] In this invention, the main valve sleeve 7 has a conical valve core 6 inside the through hole, and a sealing surface 8 is provided on the top of the conical valve core 6. The distance between the sealing surface 8 and the top surface of the conical valve core 6 is 1-2 mm, preferably 1.5 mm, so that the sealing surface 8 is located at a shallower part of the top of the conical valve core 6. This makes processing convenient, allows for accurate measurement of its corresponding dimensions, avoids measurement errors in the dimensional accuracy of the conical valve core 6, and improves the performance of the solenoid valve.

[0014] In this invention, a pilot cone valve core 4 is provided on the sealing surface 8. The upper part of the pilot cone valve core 4 is located in the inner cavity of the magnetic tube 1, and the lower part of the pilot cone valve core 4 abuts against the sealing surface 8. A spring B5 is wound on the outer side of the lower part of the pilot cone valve core 4. Oil outlet holes are provided at the center and side wall of the pilot cone valve core 4 to facilitate the flow of oil from the spring cavity inside the pilot cone valve core 4 and the inner cavity of the magnetic tube 1, thereby reducing the internal pressure of the pilot cone valve core 4 and the magnetic tube 1.

[0015] The pilot cone valve core 4 of this invention has an armature 3 on its upper part. The pilot cone valve core 4 and the armature 3 have an interference fit sealing structure, which reduces the axial clearance of the solenoid valve, making the fit between the pilot cone valve core 4 and the armature 3 more perfect, the response time faster, and the performance better. A spring A2 is vertically installed in the spring cavity inside the pilot cone valve core 4. One end of the spring A2 is connected to the bottom surface of the spring cavity, and the other end of the spring A2 is connected to the top surface of the inner cavity of the magnetic tube 1.

[0016] In this invention, the lower outer wall of the main valve sleeve 7 has an annular groove, and a first O-ring is fitted inside the annular groove. The upper outer wall of the magnetic tube 1 is fitted with a second O-ring.

[0017] The usage process of this utility model is as follows: In use, the operator first installs the cone valve core 6 into the main valve sleeve 7 and sets it coaxially with the main valve sleeve 7. Then, the upper part of the pilot cone valve core 4 is connected to the armature 3 through an interference fit to form an assembly. Then, springs B5 and A2 are installed on the lower outer side of the pilot cone valve core 4 and in the internal spring cavity, respectively. Then, the assembled pilot cone valve core 4 is installed into the inner cavity of the magnetic tube 1, and the end of spring A2 is connected to the top surface of the inner cavity of the magnetic tube 1. Finally, the upper part of the assembled main valve sleeve 7 is also inserted into the inner cavity of the magnetic tube 1, so that the lower part of the pilot cone valve core 4 is tightly pressed against the sealing surface 8 of the cone valve core 6. After the lower part of the pilot cone valve core 4 is in place, the main valve sleeve 7 is fixedly connected to the magnetic tube 1 by pressing, and the O-ring used for sealing is installed into the solenoid valve. This installation not only improves production efficiency, but also reduces the phenomenon of valve jamming of the solenoid valve, and the performance is better.

[0018] Other undescribed parts of this utility model are the same as those in the prior art.

Claims

1. A magnetic sleeve-type solenoid valve, characterized in that: It includes a magnetic tube (1) and a main valve sleeve (7). The magnetic tube (1) is hollow to form an inner cavity. The main valve sleeve (7) has an axial through hole. The upper part of the main valve sleeve (7) extends into the inner cavity of the magnetic tube (1) and is fixedly connected to the magnetic tube (1) by clamping. A conical valve core (6) is provided in the through hole of the main valve sleeve (7). A sealing surface (8) is provided in the top of the conical valve core (6). The distance between the sealing surface (8) and the top surface of the conical valve core (6) is 1-2 mm. A pilot conical valve core (4) is provided on the sealing surface (8). The upper part of the pilot conical valve core (4) is located on the magnetic tube (1). Inside the cavity, the lower part of the pilot cone valve core (4) abuts against the sealing surface (8). A spring B (5) is wound around the lower outer side of the pilot cone valve core (4). An oil outlet hole is provided at the center and side wall of the pilot cone valve core (4). An armature (3) is provided at the upper part of the pilot cone valve core (4). The pilot cone valve core (4) and the armature (3) are an interference fit sealing structure. A spring A (2) is vertically provided in the spring cavity inside the pilot cone valve core (4). One end of the spring A (2) is connected to the bottom surface of the spring cavity, and the other end of the spring A (2) is connected to the top surface of the inner cavity of the magnetic tube (1).

2. The magnetic sleeve-type solenoid valve according to claim 1, characterized in that: The lower outer wall of the main valve sleeve (7) is provided with an annular groove, and a first O-ring is provided in the sealing sleeve of the annular groove.

3. The magnetic sleeve-type solenoid valve according to claim 1, characterized in that: The main valve sleeve (7) is provided with a boss that facilitates the snapping of the magnetic tube (1).

4. The magnetic sleeve-type solenoid valve according to claim 1, characterized in that: The distance between the sealing surface (8) and the top surface of the cone valve core (6) is 1.5 mm.

5. The magnetic sleeve-type solenoid valve according to claim 1, characterized in that... The upper outer wall of the magnetic tube (1) is fitted with a second O-ring seal.

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