Solenoid valve quick plug

Abstract

The utility model discloses a quick plug of an electromagnetic valve. The quick plug comprises an electromagnetic driving assembly, a valve seat, a piston assembly, a valve needle and a quick plug valve body, the valve seat is fixed to the electromagnetic driving assembly, a piston cavity is formed in the valve seat, and the piston assembly is arranged in the piston cavity in a matched mode. The valve needle is installed on the electromagnetic driving assembly, the electromagnetic driving assembly can drive the valve needle to stretch out or retract, and when the valve needle stretches out, the piston assembly can be pushed to move along the piston cavity; the quick-plug valve body is connected to the valve seat, a valve cavity is formed in the quick-plug valve body, a first connector part is formed on the peripheral wall of the valve cavity, a valve port is formed in the inner side of the end wall of the valve cavity, a center pipe extending from the valve port to the direction away from the piston assembly is arranged on the outer side of the end wall of the valve cavity, and a second connector part is arranged on the peripheral wall of the end, away from the valve port, of the center pipe. A plurality of inflow holes are formed in the end wall of the valve cavity around the center pipe. The volume, the weight and the caliber of the quick-inserting valve body can be reduced, and the requirement for the quick-inserting size of a small-caliber electromagnetic valve is met.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic valves, in particular to a electromagnetic valve quick plug. Background Art

[0002] The solenoid valve quick-insert is used to be installed on the flow channel plate to control the flow channel in the flow channel plate.

[0003] Chinese utility model CN216009561U provides a solenoid valve assembly, including a valve core seat assembly and a coil assembly installed on the valve core seat assembly, the valve core seat assembly including a valve core seat, a valve core, a valve cover, a return spring, a sleeve, a fixed armature, a valve needle, and a piston, the valve core seat is provided with a transverse channel, a longitudinal channel and a valve cavity connected to the transverse channel, the valve cavity is provided with a main valve port connected to the longitudinal channel, the valve cover is fixedly connected to the valve core seat, the piston is in a cavity at the bottom of the valve cover or in the valve cavity of the valve core seat, and the coil assembly drives the valve core to move to push the piston to open or close the main valve port.

[0004] However, the transverse channel of the above-mentioned solenoid valve assembly is an inlet hole, and the longitudinal channel is an outlet hole. The inlet hole is arranged on the side of the quick-insert valve body (valve core seat), resulting in a large volume and a large diameter of the quick-insert valve body, which is not suitable for the setting of a small-diameter solenoid valve quick-insert. Utility Model Content

[0005] In view of the defects in the prior art, the utility model provides a solenoid valve quick plug, so as to reduce the volume and weight of the quick plug valve body and reduce the diameter, thereby meeting the size requirements of small-diameter solenoid valve quick plugs.

[0006] The utility model provides a solenoid valve quick-insert, comprising an electromagnetic drive assembly, a valve seat, a piston assembly, a valve needle and a quick-insert valve body;

[0007] The valve seat is fixed on the electromagnetic drive assembly, a piston cavity is arranged in the valve seat, and the piston assembly is adapted to fit in the piston cavity;

[0008] The valve needle is installed on the electromagnetic drive assembly, and the electromagnetic drive assembly can drive the valve needle to extend or retract. When the valve needle extends, it can push the piston assembly to move along the piston cavity;

[0009] The quick-connect valve body is connected to the valve seat, and a valve cavity is provided in the quick-connect valve body. The outer peripheral wall of the valve cavity forms a first joint part. The inner side of the end wall of the valve cavity is provided with a valve port which is aligned with the piston assembly and protrudes toward one side of the piston assembly. The outer side of the end wall of the valve cavity is provided with a center tube extending from the valve port in a direction away from the piston assembly. The outer peripheral wall of the center tube at one end away from the valve port is provided with a second joint part, and a plurality of inlet holes are provided on the end wall of the valve cavity around the center tube.

[0010] Furthermore, the electromagnetic drive assembly includes a sleeve assembly, a coil assembly surrounding the sleeve assembly, a moving iron core movably adapted in the sleeve assembly, a stationary iron core fixed in the sleeve assembly and arranged between the moving iron core and the piston assembly, and a return spring supported between the moving iron core and the stationary iron core, an axial through-hole is provided in the stationary iron core, one end of the valve needle is connected to the moving iron core, and the other end passes through the through-hole.

[0011] Furthermore, the sleeve assembly includes a sleeve and a head welded to one end of the sleeve close to the moving iron core.

[0012] Furthermore, the moving iron core is provided with a first step hole, a second step hole and a third step hole which are gradually enlarged, one end of the valve needle passes through the first step hole and is provided with a limit block adapted to the second step hole, the third step hole is provided with a pressure plate, and a valve needle spring is supported between the limit block and the pressure plate.

[0013] Furthermore, the piston assembly includes a piston and a sealing block embedded in the piston, and an axial through hole is provided in the sealing block. When the electromagnetic drive assembly drives the valve needle to extend, the valve needle is blocked at one end of the through hole.

[0014] Furthermore, the valve seat and the quick-insert valve body are threadedly connected, and the valve seat and the quick-insert valve body are sealed by a first O-ring.

[0015] Furthermore, a second O-ring is disposed outside the first joint portion.

[0016] Furthermore, a third O-ring is disposed outside the second joint portion.

[0017] The beneficial effects of the utility model are embodied in:

[0018] The first joint part and the second joint part of the quick-plug valve body of the present application are respectively used to connect with the flow channel plate. When the quick-plug valve body is installed on the flow channel plate, the inlet holes outside the quick-plug valve body are connected to the inlet channel in the flow channel plate, and the center tube is connected to the outlet channel in the flow channel plate. When the electromagnetic drive component controls the piston component to open the valve port, the fluid can enter the valve cavity through the inlet holes and flow out from the center tube. The inlet channel and the outlet channel are connected and are in an open valve state. When the electromagnetic drive component controls the piston assembly to close the valve port, the inlet channel and the outlet channel can be cut off and are in a closed valve state. The present application sets the inlet holes on the end wall of the valve cavity around the center tube, rather than on the peripheral wall of the valve cavity. By optimizing the structure, the volume and weight of the quick-plug valve body can be reduced, and the diameter can be reduced, thereby meeting the size requirements of small-diameter electromagnetic valve quick plugs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0020] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0021] Figure 2 This is a schematic structural diagram of a sleeve assembly according to an embodiment of the utility model;

[0022] Figure 3 It is a schematic diagram of the combination of the moving iron core and the valve needle in an embodiment of the utility model;

[0023] Figure 4 It is a schematic diagram of the combination of the static iron core and the valve seat of an embodiment of the utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the piston assembly of an embodiment of the utility model;

[0025] Figure 6 It is a structural schematic diagram of a quick-insert valve body according to an embodiment of the utility model.

[0026] In the attached drawings, 100-electromagnetic drive assembly; 110-sleeve assembly; 111-sleeve; 112-head; 120-coil assembly; 130-moving iron core; 131-first step hole; 132-second step hole; 133-third step hole; 134-pressing plate; 135-valve needle spring; 140-static iron core; 141-perforation; 150-reset spring; 200-valve seat; 210-piston cavity; 220-first O-ring seal; 300-piston assembly; 310-piston; 320-sealing block; 321-through hole; 400-valve needle; 410-limiting block; 500-quick-insert valve body; 510-valve cavity; 520-first joint part; 521-second O-ring; 530-valve port; 540-center tube; 550-second joint part; 551-third O-ring; 560-inlet hole. DETAILED DESCRIPTION

[0027] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0028] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.

[0029] like Figure 1-Figure 6 As shown, an embodiment of the utility model provides a solenoid valve quick-insert, including an electromagnetic drive assembly 100, a valve seat 200, a piston assembly 300, a valve needle 400 and a quick-insert valve body 500.

[0030] The valve seat 200 is fixed on the electromagnetic driving assembly 100 . A piston cavity 210 is arranged in the valve seat 200 . The piston assembly 300 is adapted to fit in the piston cavity 210 .

[0031] The valve needle 400 is mounted on the electromagnetic drive assembly 100 . The electromagnetic drive assembly 100 can drive the valve needle 400 to extend or retract. When the valve needle 400 extends, it can push the piston assembly 300 to move along the piston chamber 210 .

[0032] In this embodiment, refer to Figure 5 The piston assembly 300 includes a piston 310 and a sealing block 320 embedded in the piston 310. The sealing block 320 is provided with an axially penetrating through hole 321. When the electromagnetic drive assembly 100 drives the valve needle 400 to extend, the valve needle 400 is blocked at one end of the through hole 321. When the electromagnetic valve is in a normally open state, the valve needle 400 is separated from the sealing block 320. The through hole 321 on the sealing block 320 is connected to both ends of the piston assembly 300, which has the function of balancing the pressure at both ends of the piston assembly 300, and can prevent the valve needle 400 from being unable to push the piston assembly 300 due to excessive fluid pressure. When the valve needle 400 pushes the piston assembly 300 to move downward, the valve needle 400 blocks the through hole 321 in the sealing block 320, which can prevent the fluid from being pressed into the upper end of the piston assembly 300 and affecting the reset of the piston assembly 300.

[0033] The quick-insert valve body 500 is connected to the valve seat 200. Specifically, the valve seat 200 and the quick-insert valve body 500 are threadedly connected, and the valve seat 200 and the quick-insert valve body 500 are sealed by a first O-ring 220, so that a static seal is formed between the valve seat 200 and the quick-insert valve body 500. The quick-insert valve body 500 is threadedly connected to the flow channel plate, and a valve cavity 510 is provided in the quick-insert valve body 500. The outer peripheral wall of the valve cavity 510 forms a first joint part 520. A second O-ring 521 is provided outside the first joint part 520, and the second O-ring 521 forms a static seal with the flow channel plate. The inner side of the end wall of the valve cavity 510 is provided with a valve port 530 aligned with the piston assembly 300 and protruding toward one side of the piston assembly 300. The outer side of the end wall of the valve cavity 510 is provided with a center pipe 540 extending from the valve port 530 to a direction away from the piston assembly 300. The outer peripheral wall of the center pipe 540 away from the valve port 530 is provided with a second joint part 550. The outer side of the second joint part 550 is provided with a third O-ring 551, and the third O-ring 551 forms a static seal with the flow channel plate. A plurality of inlet holes 560 are provided on the end wall of the valve cavity 510 around the center pipe 540.

[0034] The area of ​​all the inlet holes 560 on the quick-insert valve body 500 of this embodiment is the same as the flow area of ​​the central tube 540 to prevent throttling. The number of the inlet holes 560 is specifically 6, and compared with other solenoid valve quick-inserts, the number of inlet holes is reduced, which reduces the processing difficulty and improves the machining efficiency.

[0035] In this embodiment, refer to Figure 1-Figure 4 The electromagnetic drive assembly 100 includes a sleeve assembly 110, a coil assembly 120 surrounding the sleeve assembly 110, a moving iron core 130 movably adapted in the sleeve assembly 110, a stationary iron core 140 fixed in the sleeve assembly 110 and arranged between the moving iron core 130 and the piston assembly 300, and a return spring 150 supported between the moving iron core 130 and the stationary iron core 140. An axial through-hole 141 is provided in the stationary iron core 140. One end of the valve needle 400 is connected to the moving iron core 130, and the other end passes through the through-hole 141.

[0036] The sleeve assembly 110 specifically includes a sleeve 111 and a head 112 welded to one end of the sleeve 111 close to the moving iron core 130. The head 112 and the sleeve 111 are laser welded, which simplifies the head 112 and eliminates the pressing sleeve and the stopper, making the structure more compact and simple.

[0037] The moving iron core 130 is provided with a first step hole 131, a second step hole 132 and a third step hole 133 which are gradually enlarged. One end of the valve needle 400 passes through the first step hole 131 and is provided with a limit block 410 adapted to the second step hole 132. The third step hole 133 is provided with a pressing plate 134. A valve needle spring 135 is supported between the limit block 410 and the pressing plate 134. The valve needle spring 135 can tighten the valve needle 400 and also has a buffering effect on the valve needle 400.

[0038] The solenoid valve quick plug is normally open. When the coil assembly 120 is energized, the moving iron core 130 is magnetized and attracted to the static iron core 140, overcoming the elastic force of the reset spring 150 and moving downward, thereby driving the valve needle 400 to move downward. The valve needle 400 pushes the piston assembly 300 to block the valve port 530 in the quick plug valve body 500, and the solenoid valve quick plug is closed. When the coil assembly 120 is de-energized, the attraction between the moving iron core and the static iron core 140 disappears, and the moving iron core moves upward under the action of the reset spring 150, thereby driving the valve core to move upward. When the valve core moves upward, the fluid pushes the piston assembly 300 to move upward, so that the piston assembly 300 is separated from the valve port 530 of the quick plug valve body 500, and the solenoid valve quick plug is opened.

[0039] The first joint part 520 and the second joint part 550 of the quick-insertion valve body 500 of the present application are respectively used to connect with the flow channel plate. When the quick-insertion valve body 500 is installed on the flow channel plate, the inlet holes 560 outside the quick-insertion valve body 500 are connected to the inlet channel in the flow channel plate, and the center tube 540 is connected to the outlet channel in the flow channel plate. When the electromagnetic drive component 100 controls the piston component 300 to open the valve port 530, the fluid can enter the valve cavity 510 through the inlet holes 560 and flow out from the center tube 540. It is connected to the outlet channel and is in an open valve state. When the electromagnetic drive component 100 controls the piston component 300 to close the valve port 530, the inlet channel and the outlet channel can be cut off and it is in a closed valve state. The present application sets the inlet hole 560 on the end wall of the valve cavity 510 around the center tube 540, rather than on the peripheral wall of the valve cavity 510. By optimizing the structure, the volume and weight of the quick-insert valve body 500 can be reduced, and the diameter can be reduced, thereby meeting the size requirements of small-diameter solenoid valve quick-inserts.

[0040] The solenoid valve quick-connect provided in this embodiment can be made into a 5mm diameter, which is smaller in size, lighter in weight and lower in cost than the 12mm diameter solenoid valve quick-connect products on the market.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A solenoid valve quick-insert, characterized in that: It includes an electromagnetic drive assembly, a valve seat, a piston assembly, a valve needle and a quick-insert valve body; The valve seat is fixed on the electromagnetic drive assembly, a piston cavity is arranged in the valve seat, and the piston assembly is adapted to fit in the piston cavity; The valve needle is installed on the electromagnetic drive assembly, and the electromagnetic drive assembly can drive the valve needle to extend or retract. When the valve needle extends, it can push the piston assembly to move along the piston cavity; The quick-connect valve body is connected to the valve seat, and a valve cavity is provided in the quick-connect valve body. The outer peripheral wall of the valve cavity forms a first joint part. The inner side of the end wall of the valve cavity is provided with a valve port which is aligned with the piston assembly and protrudes toward one side of the piston assembly. The outer side of the end wall of the valve cavity is provided with a center tube extending from the valve port in a direction away from the piston assembly. The outer peripheral wall of the center tube at one end away from the valve port is provided with a second joint part, and a plurality of inlet holes are provided on the end wall of the valve cavity around the center tube.

2. The solenoid valve quick-connect according to claim 1, characterized in that: The electromagnetic drive assembly includes a sleeve assembly, a coil assembly surrounding the sleeve assembly, a moving iron core movably adapted in the sleeve assembly, a stationary iron core fixed in the sleeve assembly and arranged between the moving iron core and the piston assembly, and a return spring supported between the moving iron core and the stationary iron core. An axial through-hole is provided in the stationary iron core, one end of the valve needle is connected to the moving iron core, and the other end passes through the through-hole.

3. The solenoid valve quick-connect according to claim 2, characterized in that: The sleeve assembly comprises a sleeve and a head welded to one end of the sleeve close to the moving iron core.

4. The solenoid valve quick-connect according to claim 2, characterized in that: The moving iron core is provided with a first step hole, a second step hole and a third step hole which are gradually enlarged. One end of the valve needle passes through the first step hole and is provided with a limit block adapted to the second step hole. The third step hole is provided with a pressing plate, and a valve needle spring is supported between the limit block and the pressing plate.

5. The solenoid valve quick-connect according to claim 1, characterized in that: The piston assembly comprises a piston and a sealing block embedded in the piston. An axial through hole is provided in the sealing block. When the electromagnetic drive assembly drives the valve needle to extend, the valve needle blocks one end of the through hole.

6. The solenoid valve quick connector according to claim 1, characterized in that: The valve seat is threadedly connected to the quick-insert valve body, and the valve seat and the quick-insert valve body are sealed by a first O-ring.

7. The solenoid valve quick connector according to claim 1, characterized in that: A second O-ring is disposed outside the first joint portion.

8. The solenoid valve quick connector according to claim 1, characterized in that: A third O-ring is disposed outside the second joint portion.

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