Electromagnetic valve element and electromagnetic valve

Abstract

The utility model provides an electromagnetic valve core and an electromagnetic valve, relates to the technical field of electromagnetic valves, and aims to solve the technical problem that in the prior art, an annular closed sealing ring and a sealing ring with a notch are difficult to install on the valve core, so that the sealing performance is poor. An electromagnetic valve element comprises a valve element body, the valve element body comprises a first valve element body and a second valve element body which are vertically distributed and coaxially arranged, the first valve element body and the second valve element body are connected with a fixing structure used for fixedly connecting the first valve element body and the second valve element body, and the bottom end of the first valve element body is attached to the top end of the second valve element body. An annular groove is formed in the peripheral wall of the first valve element / the second valve element in the circumferential direction and penetrates through the bottom end of the first valve element / the top end of the second valve element, an annular closed sealing ring is sleeved with the annular groove, and the peripheral wall of the sealing ring is used for abutting against the inner wall of an electromagnetic valve deck. The utility model further relates to an electromagnetic valve which comprises the electromagnetic valve element. The annular closed sealing ring can be directly sleeved into the annular groove, and a sealing ring with a notch does not need to be used any more.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic valves, in particular to an electromagnetic valve core and an electromagnetic valve. Background Art

[0002] The solenoid valve is used to control and regulate the fluid medium, mainly used to control the on and off of the flow of the fluid. Common solenoid valves include valve seats, pistons, valve cover assemblies, return springs, moving iron cores, static iron cores, coil assemblies, etc. The solenoid valve takes in air from the side holes of the valve seat and discharges air from the lower end holes. When the coil assembly is energized, the static iron core generates a magnetic field, driving the moving iron core to move. The moving iron core drives the sealing gasket to block the pressure relief hole to form high pressure. The high pressure causes the valve core to move downward to block the air outlet, so that the air inlet and the air outlet are disconnected; after the power is turned off, the return spring causes the moving iron core to rise, driving the sealing gasket to leave the pressure relief hole, the high pressure disappears, the valve core moves upward, and the air inlet and the air outlet are reconnected. Since the on and off of the solenoid valve is achieved by the up and down movement of the valve core, and the up and down movement of the valve core is achieved by the pressure difference, the sealing effect of the valve core and the valve cover has an extremely important influence on the stable operation of the solenoid valve. The sealing ring between the valve core and the valve cover needs to be set in the middle of the valve core. Generally, an annular groove is opened in the middle of the valve core, and the sealing ring is connected in the annular groove. The sealing effect of an annular sealing ring is the best, but because the annular groove is set in the middle of the valve core, the annular sealing ring is difficult to assemble. If the sealing ring is stretched and inserted into the annular groove, it is easy to cause serious deformation of the sealing ring and affect the sealing effect. Therefore, the sealing ring with a gap is mostly used at present. The sealing ring with a gap can be expanded and embedded in the annular groove, and then the two ends of the sealing ring are connected by elastic spring wire. However, there is still a gap on the assembled sealing ring, and the gas is easy to leak from the gap and affect the sealing performance, and then affect the stability of the solenoid valve. Utility Model Content

[0003] In view of the deficiencies in the prior art, the first purpose of the utility model is to provide a solenoid valve core to solve the technical problem that the valve core in the prior art is difficult to install an annular closed sealing ring and a sealing ring with a gap is installed, resulting in poor sealing.

[0004] To solve the above technical problems, the utility model provides a solenoid valve core, including a valve core body, the valve core body including a first valve core and a second valve core distributed up and down and coaxially arranged, the first valve core and the second valve core are connected with a fixing structure for fixing the first valve core and the second valve core, the bottom end of the first valve core is in contact with the top end of the second valve core, an annular groove is circumferentially provided on the outer peripheral wall of the first valve core / the second valve core, the annular groove passes through the bottom end of the first valve core / the top end of the second valve core, an annular closed sealing ring is sleeved in the annular groove, and the outer peripheral wall of the sealing ring is used to abut against the inner wall of the solenoid valve cover.

[0005] After adopting the above structure, a solenoid valve core in the utility model has the following advantages: the valve core body is arranged into a split first valve core and a second valve core, so that the annular groove can be arranged on the first valve core or the second valve core, if the annular groove is arranged on the first valve core, it runs through the bottom end of the first valve core, if the annular groove is arranged on the second valve core, it runs through the top end of the second valve core, so that the annular closed sealing ring can be directly inserted into the annular groove without deformation that affects its sealing performance, and there is no need to use a sealing ring with a notch. After the sealing ring is installed, the first valve core is connected to the second valve core by using a fixed structure, and the sealing ring is still in the middle of the valve core body, which has a good sealing effect and improves the stability of the solenoid valve operation.

[0006] As an improvement, the fixing structure includes a through hole and an annular protrusion, the through hole is arranged on the first valve core along the axial direction of the first valve core, the annular protrusion is arranged at the top end of the second valve core, the annular protrusion is inserted into the through hole, the top end of the annular protrusion is higher than the top end of the through hole, and the top end of the annular protrusion is fixedly connected to the first valve core by riveting; this structure has the advantages of simple structure and stable connection.

[0007] As an improvement, a groove is provided at the top end of the first valve core, and a through hole is provided at the bottom end of the groove; with this structure, the groove can not only save material of the first valve core, but also facilitate the processing of the through hole and the riveting operation of the annular convex part, which is convenient for production, and also avoids the contact between the annular convex part and the valve cover after riveting.

[0008] As an improvement, the through hole is coaxially arranged with the first valve core, and the annular protrusion is coaxially arranged with the second valve core; with this structure, the through hole and the annular protrusion are arranged at the axis center of the whole, thereby improving the stability of the connection between the first valve core and the second valve core.

[0009] As an improvement, the inner hole of the annular protrusion is in a trumpet shape with the inner diameter of the upper end being larger than the inner diameter of the lower end; this structure facilitates the riveting and deformation of the annular protrusion and is convenient for processing.

[0010] As an improvement, an annular groove is provided on the outer peripheral wall of the first valve core along the circumferential direction, and the annular groove runs through the bottom end of the first valve core.

[0011] As an improvement, a first sliding portion is provided on the outer peripheral wall of the first valve core along the circumferential direction, and a second sliding portion is provided on the outer peripheral wall of the second valve core along the circumferential direction. The outer diameter of the first sliding portion is the same as the outer diameter of the second sliding portion. The outer peripheral wall of the first sliding portion and the outer peripheral wall of the second sliding portion are both used for sliding cooperation with the inner wall of the solenoid valve cover. The first sliding portion and the second sliding portion have the same thickness, and the sealing ring is located exactly in the middle of the first sliding portion and the second sliding portion. With this structure, the central arrangement of the sealing ring can prevent the valve core from being eccentric when sliding up and down.

[0012] The second purpose of the utility model is to provide a solenoid valve, including the above-mentioned solenoid valve core, and also including a valve seat and a valve cover, a mounting cavity is provided in the valve seat, the valve cover is fixedly connected in the mounting cavity, the valve core body is slidably connected in the valve cover, the outer peripheral wall of the sealing ring is slidably and sealedly connected with the inner hole of the valve cover, an air inlet is provided on the side wall of the valve seat, and an air outlet is provided at the bottom end of the valve seat, both the air inlet and the air outlet are connected to the mounting cavity, and a spring is connected between the valve core body and the bottom end of the mounting cavity.

[0013] After adopting the above structure, a solenoid valve in the utility model has the following advantages: the valve core body is arranged into a split first valve core and a second valve core, so that the annular groove can be arranged on the first valve core or the second valve core, if the annular groove is arranged on the first valve core, it runs through the bottom end of the first valve core, and if the annular groove is arranged on the second valve core, it runs through the top end of the second valve core, so that the annular closed sealing ring can be directly inserted into the annular groove without deformation that affects its sealing performance, and there is no need to use a sealing ring with a notch. The annular closed sealing ring is connected to the inner wall of the valve cover by sliding sealing. After the sealing ring is installed, the first valve core and the second valve core are connected by a fixed structure, and the sealing ring is still in the middle of the valve core body, which has a good sealing effect and improves the stability of the solenoid valve.

[0014] As an improvement, a first protrusion arranged around the air outlet is provided at the bottom end of the installation cavity, and a second protrusion is provided at the bottom end of the installation cavity which is arranged circumferentially along the inner wall of the installation cavity and connected to the inner wall of the installation cavity, and the lower end of the spring is located between the first protrusion and the second protrusion; by adopting this structure, the lower end of the spring is restricted between the first protrusion and the second protrusion, preventing the lower end of the spring from moving or even deforming due to high pressure, thereby improving the service life of the spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the first embodiment of the present utility model.

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of the first embodiment of the utility model.

[0017] Figure 3 It is a cross-sectional view of the second embodiment of the present utility model.

[0018] Figure 4 It is a schematic diagram of the three-dimensional structure of the second embodiment of the utility model.

[0019] Figure numerals: 100, valve core body; 1, first valve core; 2, second valve core; 3, fixing structure; 31, through hole; 32, annular convex portion; 4, annular groove; 5, sealing ring; 6, groove; 7, first sliding portion; 8, second sliding portion; 9, valve seat; 10, valve cover; 11, installation cavity; 12, air inlet; 13, air outlet; 14, spring; 15, first protrusion; 16, second protrusion. DETAILED DESCRIPTION

[0020] The solenoid valve core and the solenoid valve of the utility model are described in detail below in conjunction with the accompanying drawings.

[0021] Embodiment 1:

[0022] like Figure 1 to Figure 2 As shown, in this embodiment, a solenoid valve core is provided, including a valve core body 100, and the valve core body 100 includes a split first valve core 1 and a second valve core 2 which are distributed up and down and coaxially arranged, and a fixing structure 3 for fixing the first valve core 1 and the second valve core 2 is connected to the first valve core 1 and the second valve core 2, and the bottom end of the first valve core 1 is in contact with the top end of the second valve core 2, and an annular groove 4 is circumferentially provided on the outer peripheral wall of the first valve core 1 / the second valve core 2, and the annular groove 4 passes through the bottom end of the first valve core 1 / the top end of the second valve core 2, that is, an annular groove 4 is provided on the outer peripheral wall of the first valve core 1, and the annular groove 4 passes through the bottom end of the first valve core 1, or an annular groove 4 is provided on the outer peripheral wall of the second valve core 2, and the annular groove 4 passes through the top end of the second valve core 2; in this embodiment, an annular groove 4 is circumferentially provided on the outer peripheral wall of the first valve core 1, and the annular groove 4 passes through the bottom end of the first valve core 1, and an annular closed sealing ring 5 is sleeved in the annular groove 4, and the outer peripheral wall of the sealing ring 5 is used to abut against the inner wall of the solenoid valve cover 10.

[0023] like Figure 1 As shown, the fixing structure 3 includes a through hole 31 and an annular protrusion 32. The through hole 31 is axially arranged on the first valve core 1 along the first valve core 1. Specifically, a groove 6 is provided at the top of the first valve core 1, and the through hole 31 is arranged at the bottom of the groove 6; the annular protrusion 32 is arranged at the top of the second valve core 2, and the annular protrusion 32 is inserted into the through hole 31. The top of the annular protrusion 32 is higher than the top of the through hole 31, that is, higher than the bottom of the groove 6, and the top of the annular protrusion 32 is fixedly connected to the first valve core 1 by riveting; further, the through hole 31 is coaxially arranged with the first valve core 1, and the annular protrusion 32 is coaxially arranged with the second valve core 2. The inner hole of the annular protrusion 32 is trumpet-shaped with an inner diameter at the upper end being larger than an inner diameter at the lower end. In addition, a cylindrical inner hole extends downward from the lower end of the trumpet-shaped inner hole of the annular protrusion 32.

[0024] like Figure 1As shown, a first sliding portion 7 is circumferentially provided on the outer peripheral wall of the first valve core 1, and a second sliding portion 8 is circumferentially provided on the outer peripheral wall of the second valve core 2, the outer diameter of the first sliding portion 7 is the same as the outer diameter of the second sliding portion 8, the outer peripheral wall of the first sliding portion 7 and the outer peripheral wall of the second sliding portion 8 are both used for sliding cooperation with the inner wall of the solenoid valve cover 10, the first sliding portion 7 and the second sliding portion 8 have the same thickness, and the sealing ring 5 is located in the middle of the first sliding portion 7 and the second sliding portion 8; in this embodiment, the first sliding portion 7 is the entire outer peripheral wall of the first valve core 1 except the annular groove 4, and the second sliding portion 8 is the part of the upper part of the second valve core 2 that protrudes outward in the circumferential direction, the top of the second sliding portion 8 is flush with the top of the second valve core 2, and the upper and lower end faces of the sealing ring 5 are respectively against the top of the annular groove 4 and the top of the second sliding portion 8.

[0025] The valve core body 100 is arranged to be a split first valve core 1 and a second valve core 2, so that the annular groove 4 can be arranged on the first valve core 1 or the second valve core 2. If the annular groove 4 is arranged on the first valve core 1, it passes through the bottom end of the first valve core 1; if the annular groove 4 is arranged on the second valve core 2, it passes through the top end of the second valve core 2, so that the annular closed sealing ring 5 can be directly inserted into the annular groove 4 without deformation that affects its sealing performance, and there is no need to use a sealing ring with a notch. After the sealing ring 5 is installed, the first valve core 1 is connected to the second valve core 2 by using the fixing structure 3. The sealing ring 5 is still in the middle of the valve core body 100, which has a good sealing effect and improves the working stability of the solenoid valve.

[0026] Embodiment 2:

[0027] like Figure 3 and Figure 4 As shown, a solenoid valve is provided in the present embodiment, including the solenoid valve core in the first embodiment, and also including a valve seat 9 and a valve cover 10, wherein an installation cavity 11 is provided in the valve seat 9, the valve cover 10 is fixedly connected in the installation cavity 11, the valve core body 100 is slidably connected in the valve cover 10, the outer peripheral wall of the sealing ring 5 is slidably and sealedly connected with the inner hole of the valve cover 10, an air inlet 12 is provided on the side wall of the valve seat 9, an air outlet 13 is provided at the bottom end of the valve seat 9, both the air inlet 12 and the air outlet 13 are connected to the installation cavity 11, and a spring 14 is connected between the valve core body 100 and the bottom end of the installation cavity 11.

[0028] like Figure 3 As shown, a first protrusion 15 is provided at the bottom end of the installation cavity 11 and is arranged around the air outlet 13. A second protrusion 16 is provided at the bottom end of the installation cavity 11 and is arranged circumferentially along the inner wall of the installation cavity 11 and connected to the inner wall of the installation cavity 11. The lower end of the spring 14 is located between the first protrusion 15 and the second protrusion 16. The upper end of the spring 14 is against the bottom end of the second sliding portion 8. The upper end of the spring 14 is located between the inner wall of the valve cover 10 and the outer wall of the second valve core 2.

[0029] The implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned one implementation mode, and all other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of the present invention.

Claims

1. A solenoid valve core, characterized in that: The invention comprises a valve core body (100), wherein the valve core body (100) comprises a first valve core (1) and a second valve core (2) which are distributed up and down and arranged coaxially, wherein the first valve core (1) and the second valve core (2) are connected with a fixing structure (3) for fixing the first valve core (1) and the second valve core (2), wherein the bottom end of the first valve core (1) is in contact with the top end of the second valve core (2), and an annular groove (4) is circumferentially provided on the outer peripheral wall of the first valve core (1) / the second valve core (2), wherein the annular groove (4) passes through the bottom end of the first valve core (1) / the top end of the second valve core (2), and an annular closed sealing ring (5) is sleeved in the annular groove (4), and the outer peripheral wall of the sealing ring (5) is used to abut against the inner wall of the solenoid valve cover (10).

2. The solenoid valve core according to claim 1, characterized in that: The fixing structure (3) comprises a through hole (31) and an annular convex portion (32); the through hole (31) is arranged on the first valve core (1) along the axial direction of the first valve core (1); the annular convex portion (32) is arranged at the top end of the second valve core (2); the annular convex portion (32) is inserted into the through hole (31); the top end of the annular convex portion (32) is higher than the top end of the through hole (31); and the top end of the annular convex portion (32) is fixedly connected to the first valve core (1) by riveting.

3. The solenoid valve core according to claim 2, characterized in that: The top end of the first valve core (1) is provided with a groove (6), and the through hole (31) is provided at the bottom end of the groove (6).

4. The solenoid valve core according to claim 2, characterized in that: The through hole (31) is coaxially arranged with the first valve core (1), and the annular protrusion (32) is coaxially arranged with the second valve core (2).

5. The solenoid valve core according to claim 2, characterized in that: The inner hole of the annular protrusion (32) is in a trumpet shape with an inner diameter at the upper end being larger than an inner diameter at the lower end.

6. The solenoid valve core according to claim 1, characterized in that: An annular groove (4) is provided on the outer peripheral wall of the first valve core (1) along the circumferential direction, and the annular groove (4) passes through the bottom end of the first valve core (1).

7. The solenoid valve core according to claim 6, characterized in that: A first sliding portion (7) is circumferentially provided on the outer peripheral wall of the first valve core (1), and a second sliding portion (8) is circumferentially provided on the outer peripheral wall of the second valve core (2). The outer diameter of the first sliding portion (7) is the same as the outer diameter of the second sliding portion (8). The outer peripheral wall of the first sliding portion (7) and the outer peripheral wall of the second sliding portion (8) are both used for sliding cooperation with the inner wall of the solenoid valve cover (10). The first sliding portion (7) and the second sliding portion (8) have the same thickness. The sealing ring (5) is located in the middle of the first sliding portion (7) and the second sliding portion (8).

8. A solenoid valve, characterized in that: The solenoid valve core comprises the solenoid valve core as claimed in any one of claims 1 to 7, and further comprises a valve seat (9) and a valve cover (10), wherein the valve seat (9) is provided with an installation cavity (11), the valve cover (10) is fixedly connected in the installation cavity (11), the valve core body (100) is slidably connected in the valve cover (10), the outer peripheral wall of the sealing ring (5) is slidably sealedly connected with the inner hole of the valve cover (10), an air inlet (12) is provided on the side wall of the valve seat (9), and an air outlet (13) is provided at the bottom end of the valve seat (9), the air inlet (12) and the air outlet (13) are both connected to the installation cavity (11), and a spring (14) is connected between the valve core body (100) and the bottom end of the installation cavity (11).

9. The solenoid valve according to claim 8, characterized in that: The bottom end of the installation cavity (11) is provided with a first protrusion (15) arranged around the air outlet (13), and the bottom end of the installation cavity (11) is provided with a second protrusion (16) arranged along the circumference of the inner wall of the installation cavity (11) and connected to the inner wall of the installation cavity (11), and the lower end of the spring (14) is located between the first protrusion (15) and the second protrusion (16).

Images