Two-position three-way electromagnetic valve and dental treatment machine

Abstract

The utility model relates to the technical field of valves, in particular to a two-position three-way electromagnetic valve and a dental treatment machine. A two-position three-way electromagnetic valve comprises a valve body, an iron core assembly and an ejector rod assembly, an inlet of the valve body is communicated with a first outlet through a first valve port and forms a first flow channel, and the inlet is communicated with a second outlet through a second valve port and forms a second flow channel; the iron core assembly comprises a movable iron core, and the movable iron core can do reciprocating motion relative to the first valve port so as to control opening / closing of the first valve port; the ejector rod assembly comprises an ejector rod and a first sealing piece, the first sealing piece is installed on the ejector rod and used for controlling opening / closing of the second valve port, and the ejector rod is configured to be of an integrated structure and abuts against the movable iron core; when the two-position three-way electromagnetic valve is in a first working mode, the first flow channel is connected, and the second flow channel is disconnected, and when the two-position three-way electromagnetic valve is in a second working mode, the first flow channel is disconnected, and the second flow channel is connected. The size of the two-position three-way electromagnetic valve is reduced, and the stability of the ejector rod is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valves, in particular to a two-position three-way electromagnetic valve and a dental treatment machine. BACKGROUND

[0002] In the rapid development of modern industry and technology, electromagnetic valves, as important components for controlling fluid flow, are widely used in various fields. Two-position three-way electromagnetic valves, as one of the common types, play an important role in practical applications.

[0003] In the prior art, an active iron core and a sealing assembly are arranged inside the valve body to realize the switching of the flow passage inside the valve body. Among them, the two-position three-way electromagnetic valve usually has two valve bodies, the sealing assembly and the active iron core are respectively located in the two valve bodies, and the sealing assembly and the active iron core are connected through the setting of a lifting rod to realize power transmission. When the active iron core moves downward to block one flow passage in the valve body, the sealing assembly can be pushed open by the lifting rod to open another flow passage, thereby realizing the switching of the flow passage. Since two valve bodies are arranged and the lifting rod and the sealing assembly are arranged in the flow passage, in order to ensure the flux of the flow passage, the diameter of the flow passage needs to be increased, resulting in a large volume of the valve body, thereby limiting their application in some narrow environments. CONTENT OF THE UTILITY MODEL

[0004] Therefore, it is necessary to provide a two-position three-way electromagnetic valve with small volume.

[0005] To solve the above technical problems, the present application provides the following technical solutions:

[0006] A two-position three-way electromagnetic valve, comprising:

[0007] a valve body, which is formed with an inlet, a first valve port, a first outlet, a second valve port and a second outlet, the inlet is communicated with the first outlet through the first valve port and forms a first flow passage, and the inlet is communicated with the second outlet through the second valve port and forms a second flow passage;

[0008] an iron core assembly, comprising an active iron core, which can reciprocate relative to the first valve port to control the opening / closure of the first valve port;

[0009] a lifting rod assembly, comprising a lifting rod and a first sealing member, the first sealing member is installed on the lifting rod and used to control the opening / closure of the second valve port, wherein the lifting rod is configured as an integrated structure and abuts against the active iron core;

[0010] The two-position three-way electromagnetic valve has a first working mode and a second working mode. In the first working mode, the first flow passage is open and the second flow passage is closed. In the second working mode, the first flow passage is closed and the second flow passage is open.

[0011] It can be understood that the movable iron core and the first sealing element are used to block the first valve port and the second valve port respectively by setting, and the power transmission of the movable iron core and the first sealing element is realized by using the integrated structure of the ejector rod. This structure, on the one hand, makes it unnecessary to set two valve bodies inside the two-position three-way electromagnetic valve, which is beneficial to reducing the volume of the two-position three-way electromagnetic valve, and on the other hand, since the ejector rod is configured in an integrated structure, the problem of poor stability of the ejector rod in the presence of foreign matter or uneven water flow can be avoided.

[0012] In one of the embodiments, the ejector rod assembly further comprises a first elastic element, which abuts the first sealing element in a pre-compressed manner, and is used to push the first sealing element to block the second valve port;

[0013] In the first working mode, the first elastic element pushes the first sealing element to block the second valve port; in the second working mode, the movable iron core drives the first sealing element to compress the first elastic element under the transmission of the ejector rod.

[0014] In one of the embodiments, the ejector rod assembly further comprises a buffer sheet, which is arranged between the first elastic element and the first sealing element, and the first elastic element can push the first sealing element through the buffer sheet.

[0015] It can be understood that, by arranging the buffer sheet between the first elastic element and the first sealing element, the buffer sheet can play a buffering role, which can effectively prevent the problem of wear or deformation of the first sealing element caused by the direct contact of the end of the first elastic element with the first sealing element, thereby prolonging the service life of the first sealing element.

[0016] In one of the embodiments, a plug is sealingly connected to the valve body, and an end of the first elastic element away from the first sealing element abuts against the plug;

[0017] The plug is provided with a first recess, and the first recess is used to accommodate an end of the first elastic element abutting against the plug.

[0018] In one of the embodiments, the ejector rod comprises a mounting portion and a plurality of rod portions, and the plurality of rod portions are arranged at intervals along the circumferential direction of the mounting portion and are respectively inserted into the valve body in a fit manner;

[0019] The first sealing element is embedded in the mounting portion, and the plurality of rod portions respectively abut against the movable iron core.

[0020] In one of the embodiments, the iron core assembly further comprises a fixed iron core and a second elastic element, and the fixed iron core and the movable iron core are arranged face to face;

[0021] The second elastic member is sleeved on the end of the movable core away from the fixed core and abuts against the end of the movable core in a pre-compressed manner.

[0022] It can be understood that, by sleeving the second elastic member on the movable core instead of placing it between the movable core and the fixed core, the volume occupied by the second elastic member on the movable core is reduced, and a larger volume of movable core can be used when the coil specifications of the core assembly are the same, so that a stronger electromagnetic force can be generated under the same coil conditions. In addition, the position of the second elastic member also effectively achieves a sealing effect, preventing small impurities from entering the drive device, thereby avoiding faults caused by movement of the movable core.

[0023] In one of the embodiments, the core assembly further comprises a magnetic isolation tube, the magnetic isolation tube is connected and sealed with the valve body, and the fixed core and the movable core are both installed in the magnetic isolation tube.

[0024] The end of the second elastic member away from the movable core abuts against the magnetic isolation tube.

[0025] In one of the embodiments, the movable core is embedded with a second sealing member, and the movable core can block the first valve port through the second sealing member.

[0026] In one of the embodiments, the inlet, the first outlet and the second outlet are arranged at intervals along the circumferential direction of the valve body.

[0027] The application also provides the following technical solutions:

[0028] A dental treatment machine comprises the two-position three-way electromagnetic valve according to any one of the above embodiments.

[0029] Compared with the prior art, the two-position three-way electromagnetic valve uses the movable core and the first sealing member to block the first valve port and the second valve port respectively, and uses the integrated structure of the top rod to realize power transmission of the movable core and the first sealing member. This structure, on the one hand, makes it unnecessary to set two chambers inside the two-position three-way electromagnetic valve, which is conducive to reducing the volume of the two-position three-way electromagnetic valve, and on the other hand, since the top rod is configured in an integrated structure, it can avoid the problem that foreign matter or uneven water flow affects the stability of the top rod. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only represent some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative effort based on these drawings.

[0031] Figure 1 Front view of the two-position three-way electromagnetic valve provided by the present application.

[0032] Figure 2 Front view of the two-position three-way electromagnetic valve provided by the present application. Figure 1 Sectional view of the present application at A-A.

[0033] Figure 3 Front view of the two-position three-way electromagnetic valve provided by the present application.

[0034] Figure 4 Front view of the two-position three-way electromagnetic valve provided by the present application. Figure 3 Sectional view of the present application at B-B.

[0035] Figure 5 Exploded view of the two-position three-way electromagnetic valve provided by the present application.

[0036] The element reference numbers are as follows:

[0037] 100, two-position three-way electromagnetic valve; 10, valve body; 11, inlet; 12, first valve port; 13, first outlet; 14, second valve port; 15, second outlet; 16, first flow channel; 17, second flow channel; 20, core assembly; 21, movable core; 22, fixed core; 223, coil; 23, second elastic member; 24, magnetic isolation tube; 25, second sealing member; 30, ejector rod assembly; 31, ejector rod; 311, mounting portion; 3111, second groove; 312, rod portion; 32, first sealing member; 33, first elastic member; 34, buffer sheet; 35, plug; 351, first groove. DETAILED DESCRIPTION

[0038] In order to make the above objectives, features and advantages of the present application more apparent and comprehensible, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, a lot of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0039] It is to be understood that when a component is referred to as being "on" or "connected to" another component, it can be directly on or connected to the other component or intervening components can be present. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or intervening components can be present. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar terms as used in this description are merely used for convenience and are not intended to be limiting as to the position of the components.

[0040] In addition, the terms "first", "second", etc. are used herein only to describe various conditions, and are not intended to denote relative importance or a quantity of the indicated elements. Thus, a feature defined with "first" or "second" can include at least one of the feature, explicitly or implicitly. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0041] In the present application, unless otherwise explicitly specified and limited, "on", "under", "above", and "over" of a first feature to a second feature can mean that the first feature is in direct contact with the second feature, or the first feature is in indirect contact with the second feature through an intermediate medium. Moreover, "above", "over", and "on" of a first feature to a second feature can mean that the first feature is directly above or obliquely above the second feature, or only means that the first feature is horizontally higher than the second feature. "Below", "under", and "underneath" of a first feature to a second feature can mean that the first feature is directly below or obliquely below the second feature, or only means that the first feature is horizontally lower than the second feature.

[0042] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. The use of the terms "and / or" in the description of the present application includes all combinations of one or more relevant items listed.

[0043] Please refer to Figures 1 to 5The application provides a two-position three-way electromagnetic valve 100, which comprises a valve body 10, a core assembly 20 and a top rod assembly 30. The valve body 10 is formed with an inlet 11, a first valve port 12, a first outlet 13, a second valve port 14 and a second outlet 15. The inlet 11 is communicated with the first outlet 13 through the first valve port 12 and forms a first flow channel 16. The inlet 11 is communicated with the second outlet 15 through the second valve port 14 and forms a second flow channel 17. The core assembly 20 comprises a movable core 21, which can reciprocate relative to the first valve port 12 to control the opening / closure of the first valve port 12. The top rod assembly 30 comprises a top rod 31 and a first sealing member 32, wherein the first sealing member 32 is installed on the top rod 31 to control the opening / closure of the second valve port 14. The top rod 31 is configured as an integrated structure and abuts against the movable core 21. The two-position three-way electromagnetic valve 100 has a first working mode and a second working mode. In the first working mode, the first flow channel 16 is open and the second flow channel 17 is closed. In the second working mode, the first flow channel 16 is closed and the second flow channel 17 is open.

[0044] As known from the above, the movable core 21 and the first sealing member 32 are arranged to block the first valve port 12 and the second valve port 14, respectively. The power transmission of the movable core 21 and the first sealing member 32 is realized by the top rod 31 configured as an integrated structure. This structure can avoid the need to arrange two chambers in the two-position three-way electromagnetic valve 100, which is beneficial to reduce the volume of the two-position three-way electromagnetic valve 100. In addition, since the top rod 31 is configured as an integrated structure, the problem of poor stability of the top rod 31 in the presence of foreign matters or uneven water flow can be avoided.

[0045] As shown in Figure 1 and Figure 3 , the inlet 11, the first outlet 13 and the second outlet 15 are arranged at intervals along the circumferential direction of the valve body 10. Herein, the axes of the inlet 11, the first outlet 13 and the second outlet 15 can be arranged on the same plane or different planes.

[0046] In an embodiment, as shown in Figure 2As shown in the figure, the core assembly 20 further comprises a fixed core 22 and a second elastic member 23, the fixed core 22 is arranged face to face with the movable core 21; the second elastic member 23 is sleeved on the end of the movable core 21 away from the fixed core 22, and abuts against the end of the movable core 21 in a pre-compressed manner. By sleeving the second elastic member 23 on the movable core 21 instead of placing it between the movable core and the fixed core, the volume occupied by the second elastic member 23 is reduced, and a larger volume of movable core 21 can be used when the coil specifications of the core assembly 20 are the same, thereby generating a stronger electromagnetic force under the same coil conditions. In addition, the position of the second elastic member 23 also effectively achieves a sealing effect, preventing small impurities from entering the core assembly 20, thereby avoiding faults caused by the movement of the movable core 21.

[0047] In the present embodiment, the second elastic member 23 is configured as a spring, and a coil 223 is arranged outside the fixed core 22, which is electrically connected with the external circuit. How the fixed core 22 drives the movable core 21 to move is known to those skilled in the art, and will not be described in detail here.

[0048] As shown in the figure, Figure 2 and Figure 4 The core assembly 20 further comprises a magnetic isolation tube 24, which is connected and sealed with the valve body 10, and the fixed core 22 and the movable core 21 are both installed in the magnetic isolation tube 24; wherein the end of the second elastic member 23 away from the movable core 21 abuts against the magnetic isolation tube 24.

[0049] In an embodiment, the movable core 21 is embedded with a second sealing member 25, and the movable core 21 can block the first valve port 12 through the second sealing member 25. Here, the second sealing member 25 can be configured as a rubber pad.

[0050] As shown in the figure, Figure 2 and Figure 4 The top rod 31 comprises a mounting portion 311 and a plurality of rod portions 312, the plurality of rod portions 312 are arranged in a circumferential direction of the mounting portion 311 and are respectively inserted and matched with the valve body 10; wherein the first sealing member 32 is embedded in the mounting portion 311, and the plurality of rod portions 312 are respectively abutted with the movable core 21. Here, the number of rod portions 312 can be configured as three, four, five, etc.

[0051] In the present embodiment, the mounting portion 311 is a circular ring structure with a second groove 3111 inside, the second sealing member 25 is embedded in the second groove 3111, and the number of rod portions 312 is configured as three, which can save manufacturing cost while ensuring stable abutment of the mounting portion 311 and the movable core 21.

[0052] In an embodiment, the top rod assembly 30 further comprises a first elastic member 33 abutting the first sealing member 32 in a pre-compressed manner for pushing the first sealing member 32 to block the second valve port 14; in the first working mode, the first elastic member 33 pushes the first sealing member 32 to block the second valve port 14; in the second working mode, the movable core 21 drives the first sealing member 32 to compress the first elastic member 33 under the transmission of the top rod 31.

[0053] In the embodiment, the first elastic member 33 is configured as a spring.

[0054] As shown in Figure 4 and Figure 5 , the top rod assembly 30 further comprises a buffer sheet 34 arranged between the first elastic member 33 and the first sealing member 32, and the first elastic member 33 is capable of pushing the first sealing member 32 through the buffer sheet 34. It can be understood that by arranging the buffer sheet 34 between the first elastic member 33 and the first sealing member 32, the buffer sheet 34 can play a buffering role, which can effectively prevent the end of the first elastic member 33 from directly contacting the first sealing member 32, causing the problem of wear or deformation of the first sealing member 32, thereby prolonging the service life of the first sealing member 32.

[0055] In the embodiment, the buffer sheet 34 is configured as a filter screen.

[0056] In an embodiment, a plug 35 is sealingly connected to the valve body 10, and an end of the first elastic member 33 away from the first sealing member 32 abuts against the plug 35; wherein the plug 35 is provided with a first recess 351 for accommodating an end of the first elastic member 33 abutting against the plug 35.

[0057] The working principle of the two-position three-way electromagnetic valve 100 in the application is as follows:

[0058] The medium enters the valve body 10 through the inlet 11 of the two-position three-way electromagnetic valve 100. When the two-position three-way electromagnetic valve 100 is de-energized, the movable core 21 is pressed downward under the action of the second elastic member 23, closing the first valve port 12. At the same time, due to the pressure effect, the top rod 31 is pressed downward, causing the second valve port 14 to open, so that the medium flows in from the inlet 11 and is discharged through the second outlet 15. When the two-position three-way electromagnetic valve 100 is energized, the movable core 21 is lifted, the first outlet 13 is opened, the pressure in the valve body 10 is reduced, the top rod 31 is lifted under the action of the first elastic member 33, closing the second valve port 14, and at the same time the second outlet 15 is closed, the medium continues to enter from the inlet 11 and flows out to the first outlet 13.

[0059] The application also provides the following technical solutions: a dental treatment machine comprising the two-position three-way electromagnetic valve 100 according to any one of the above embodiments.

[0060] Each technical feature of the above-described embodiments can be combined with any other technical feature, and for the sake of brevity, not all possible combinations are described, but it is understood that the scope of the present disclosure encompasses all such possible combinations.

[0061] The above-described embodiments are merely illustrative of several embodiments of the present application, and the description is relatively specific and detailed, but should not be understood as limiting the scope of the patent application. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A two-position three-way solenoid valve, characterized in that, The two-position three-way solenoid valve (100) includes: The valve body (10) has an inlet (11), a first valve port (12), a first outlet (13), a second valve port (14), and a second outlet (15). The inlet (11) is connected to the first outlet (13) through the first valve port (12) and forms a first flow channel (16). The inlet (11) is connected to the second outlet (15) through the second valve port (14) and forms a second flow channel (17). The iron core assembly (20) includes a movable iron core (21) which is capable of reciprocating relative to the first valve port (12) to control the opening / closing of the first valve port (12); The push rod assembly (30) includes a push rod (31) and a first seal (32), the first seal (32) being mounted on the push rod (31) for controlling the opening / closing of the second valve port (14), wherein the push rod (31) is configured as an integral structure and abuts against the movable iron core (21); The two-position three-way solenoid valve (100) has a first working mode and a second working mode. In the first working mode, the first flow channel (16) is open and the second flow channel (17) is closed. In the second working mode, the first flow channel (16) is closed and the second flow channel (17) is open.

2. The two-position three-way solenoid valve according to claim 1, characterized in that, The push rod assembly (30) further includes a first elastic element (33), which abuts against the first seal (32) in a pre-compressed manner to push the first seal (32) to block the second valve port (14); In the first working mode, the first elastic element (33) pushes the first sealing element (32) to block the second valve port (14); in the second working mode, the movable iron core (21) drives the first sealing element (32) to compress the first elastic element (33) under the transmission of the push rod (31).

3. The two-position three-way solenoid valve according to claim 2, characterized in that, The push rod assembly (30) further includes a buffer plate (34), which is disposed between the first elastic member (33) and the first seal member (32), and the first elastic member (33) can push the first seal member (32) through the buffer plate (34).

4. The two-position three-way solenoid valve according to claim 2, characterized in that, A plug (35) is sealed to the valve body (10), and the end of the first elastic member (33) away from the first sealing member (32) abuts against the plug (35); The plug (35) has a first groove (351) for receiving one end of the first elastic member (33) that abuts against the plug (35).

5. The two-position three-way solenoid valve according to claim 2, characterized in that, The top rod (31) includes a mounting part (311) and multiple rod parts (312). The multiple rod parts (312) are arranged at intervals along the circumferential direction of the mounting part (311) and are respectively inserted into the valve body (10). The first sealing element (32) is embedded in the mounting part (311), and the multiple rods (312) respectively abut against the movable iron core (21).

6. The two-position three-way solenoid valve according to claim 1, characterized in that, The core assembly (20) further includes a fixed core (22) and a second elastic element (23), wherein the fixed core (22) and the movable core (21) are arranged face to face; The second elastic element (23) is fitted onto the end of the movable iron core (21) away from the fixed iron core (22) and abuts against the end of the movable iron core (21) in a pre-compressed manner.

7. The two-position three-way solenoid valve according to claim 6, characterized in that, The core assembly (20) also includes a magnetic shielding tube (24), which is connected and sealed to the valve body (10). The fixed core (22) and the movable core (21) are both installed inside the magnetic shielding tube (24). The end of the second elastic member (23) away from the movable iron core (21) abuts against the magnetic shielding tube (24).

8. The two-position three-way solenoid valve according to claim 1, characterized in that, The movable iron core (21) is fitted with a second sealing element (25), and the movable iron core (21) can block the first valve port (12) through the second sealing element (25).

9. The two-position three-way solenoid valve according to claim 1, characterized in that, The inlet (11), the first outlet (13) and the second outlet (15) are arranged at intervals along the circumferential direction of the valve body (10).

10. A dental treatment machine, characterized in that, Includes the two-position three-way solenoid valve (100) as described in any one of claims 1-9.

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