Three-way electromagnetic water valve

Abstract

The three-way electromagnetic water valve comprises a valve body and a magnetic winding assembly, a valve element is arranged in the valve body, a connecting rod is movably arranged on the valve element, the upper end of the connecting rod penetrates out of the upper end of the valve element and then is connected with the magnetic winding assembly in a matched mode, and the lower end of the connecting rod penetrates out of the lower end of the valve element and then is connected with a sealing gasket. Two balance diaphragms are arranged at the positions, close to the upper end of the valve element, in the valve element, the two balance diaphragms are vertically and symmetrically arranged, the two balance diaphragms are arranged on a connecting rod in a penetrating mode, outer rings of the balance diaphragms are fixed, the connecting rod is provided with a connecting rod head, the connecting rod head is located at the position between the two balance diaphragms, and the balance diaphragms are made of flexible materials. And the balance diaphragm can be deformed under the action of water pressure after being in contact with the connecting rod head. In the using process of the electromagnetic valve, the connecting rod head is driven to move through movement of the connecting rod and then makes contact with the balance diaphragm, the electromagnetic valve continues to move under the action of water pressure, the balance diaphragm deforms until the connecting rod achieves pressure balance, and the effects of load transmission and pressure balance are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to solenoid valve technical field, concretely relates to a tee solenoid water valve. BACKGROUND

[0002] The core of solenoid valve is the relationship between electromagnetic force, spring force and the resistance produced by water pressure to the movement structure. The mode switching of tee solenoid valve is essentially the relationship change of the resultant force of electromagnetic force and the other two loads, which leads to the movement of the connecting rod valve core of solenoid valve, and then realizes the communication of different channels.

[0003] Under the limitation of the space and power of solenoid valve, the electromagnetic force has little room for improvement; the spring force needs to meet the reset of another switching mode; the movement of the connecting rod valve core structure by water pressure will produce resistance, which will change with the change of water pressure, and the greater the water pressure, the greater the resistance and the greater the electromagnetic force required, and water pressure is one of the core performance indicators of solenoid valve, so how to balance the resistance produced by water pressure to the movement of the connecting rod valve core under the condition of certain electromagnetic force becomes a technical problem that needs to be solved urgently, and there is no relevant research at present. CONTENT OF THE UTILITY MODEL

[0004] In view of the existing technical problems, the utility model provides a tee solenoid water valve to solve the problems in the prior art.

[0005] In order to realize the above-mentioned invention purpose, the utility model provides the following technical scheme:

[0006] A tee solenoid water valve, comprising a valve body and a magnetic assembly, a valve core is arranged in the valve body, a connecting rod is movably arranged on the valve core, the upper end of the connecting rod is connected with the magnetic assembly after penetrating out of the upper end of the valve core, the lower end of the connecting rod is connected with a sealing gasket after penetrating out of the lower end of the valve core, two balance diaphragms are arranged at the position close to the upper end of the valve core, the two balance diaphragms are symmetrically arranged, the two balance diaphragms are arranged on the connecting rod, the outer ring of the balance diaphragm is fixed, the connecting rod has a connecting rod head, the connecting rod head is arranged at the position between the two balance diaphragms, the balance diaphragm is made of flexible material, and the balance diaphragm can be deformed under the action of water pressure after being in contact with the connecting rod head.

[0007] The above-mentioned technical scheme, in the use process of solenoid valve, the connecting rod head is moved and contacted with the balance diaphragm by the movement of the connecting rod, and the balance diaphragm will continue to move due to the action of water pressure, and the balance diaphragm will be deformed until the connecting rod is balanced under pressure, so as to play the role of load transmission and balanced pressure.

[0008] Preferably, the balance diaphragm comprises a diaphragm body, which is in a whole discoid structure, the diaphragm body has a center mounting hole, and the diaphragm body comprises a first connecting part, a deformation part, a second connecting part and a sealing part from the center to the outside in sequence, the inner side of the first connecting part is connected with the side wall of the center mounting hole, the outer side of the first connecting part is connected with the inner side of the deformation part, the outer side of the deformation part is connected with the inner side of the second connecting part, the outer side of the second connecting part is connected with the sealing part, and the sealing part is connected with the valve core.

[0009] In this way, when energized, the electromagnetic force is dominant, the electromagnetic force is greater than the spring force and the water pressure resistance, the connecting rod moves downward, the first connecting part on the balance diaphragm first contacts the end surface of the connecting rod head, as the connecting rod continues to move downward, the contact area between the connecting rod head and the balance diaphragm increases, at this time, the deformation part starts to deform, and the load is transmitted to the connecting rod, so that the pressure balance is realized; when de-energized, the spring force is dominant, the spring force is greater than the water pressure resistance, the water pressure generates a pressure on the lower sealing gasket, the rigidity of the sealing gasket will transmit the load to the connecting rod, the connecting rod moves upward, the first connecting part on the balance diaphragm first contacts the end surface of the connecting rod head, as the connecting rod continues to move upward, the contact area between the connecting rod head and the diaphragm increases, at this time, the deformation part starts to deform, and the load is transmitted to the connecting rod, so that the pressure balance is realized.

[0010] Preferably, the deformation part is arranged to be inclined to the axial direction of the diaphragm body from the inner side to the outer side.

[0011] Preferably, the end surface of the connecting rod head comprises a flat part and an inclined part, the flat part is arranged around the center of the connecting rod head, the inclined part is arranged around the flat part, and the end of the inclined part is arc-shaped.

[0012] At least part of the side of the first connecting part facing the connecting rod head has a top abutting plane abutting against the flat part of the connecting rod head.

[0013] Preferably, the deformation part and the second connecting part are connected through an arc-shaped structure, the arc-shaped structure comprises a first arc surface structure and a second arc surface structure, the first arc surface structure can be fitted with the end of the inclined part of the connecting rod head, the first arc surface structure and the second arc surface structure are connected at their common external tangent line, and the radii of the first arc surface structure and the second arc surface structure are the same and the bending directions thereof are opposite.

[0014] In this way, when the connecting rod moves to the upper and lower limit positions, the arc-shaped end surface of the connecting rod head is fitted with the arc-shaped structure of the deformation part of the balance diaphragm, so that the face-to-face contact is realized, and the force transmission is better.

[0015] Preferably, the side wall of the center mounting hole extends to the side of the diaphragm body along the axial direction to form a boss, the extending direction of the boss is the same as the tilting direction of the deformation part, and the height of the boss is greater than the maximum tilting height H of the deformation part.

[0016] Preferably, a limiting ring is arranged at the center position of the lower end port of the valve core, and the lower end of the connecting rod penetrates through the limiting ring.

[0017] Preferably, three rib plates are distributed along the circumferential direction between the outer periphery of the limiting ring and the inner wall of the valve core, the three rib plates are arranged along the radial direction of the valve core, the lower end port of the valve core is divided into three areas, namely a first area, a second area and a third area, the angle of the first area is smaller than the angle of the second area, the angle of the second area is the same as the angle of the third area, the first area is close to the water inlet of the valve body, and the second area and the third area are close to the first water outlet of the valve body.

[0018] In this way, the arrangement of the three rib plates improves the overall strength, and when the electromagnetic valve is energized, the connecting rod moves downward, the water inlet is communicated with the first water outlet, and when the water flow passes through the lower end port of the valve core, the water flow speed in the lower area is close to zero, the water flow mainly passes through the second area and the third area to flow into the first water outlet, and the flow resistance consistency in different modes is realized.

[0019] Preferably, the magnetic assembly comprises a coil, a moving iron core, a static iron core and a framework structure, the coil is wound on the framework structure, the static iron core is located above the valve core, the upper end of the connecting rod penetrates through the static iron core and is connected with the moving iron core, the moving iron core and the static iron core are matched by concave-convex structures, and the height ratio of the moving iron core to the static iron core is 2:3.

[0020] Preferably, a magnetic conducting sleeve is arranged between the coil and the valve body, and a magnetic conducting plate is arranged at the lower end position of the framework structure, and the magnetic conducting sleeve and the magnetic conducting plate are both provided with magnetic conducting holes.

[0021] In this way, the magnetic field distribution is uniform, and the eccentric problem of the electromagnetic valve is inhibited.

[0022] Compared with the prior art, the utility model has the beneficial effects that: in the moving process of the connecting rod, pressure balance is realized through the structural deformation of the balance diaphragm, and the transmission of load is completed; after pressure balance at the limit position, the connecting rod moves from one limit position to another limit position, the transmission of load in this process is slowly decreased, and is always greater than the increase caused by the change of electromagnetic force with displacement, that is, the force direction of the connecting rod is always consistent with the displacement direction. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1The whole structure schematic view of the utility model is shown in the figure.

[0024] Figure 2 The longitudinal section view of the utility model is shown in the figure. Figure 1

[0025] Figure 3 The section view of the balance diaphragm in the utility model is shown in the figure. Figure 1

[0026] Figure 4 The partial enlarged view of the utility model is shown in the figure. Figure 3

[0027] Figure 5 The A-A section view in the utility model is shown in the figure. Figure 1

[0028] Figure 6 The state schematic view of the utility model in the power-on mode is shown in the figure.

[0029] Figure 7 The state schematic view of the utility model in the power-off mode is shown in the figure.

[0030] Figure 8 The linear change graph of load transmission in the connecting rod moving process under the finite element simulation model is shown in the figure. DETAILED DESCRIPTION

[0031] The utility model will be described in further detail below in combination with test examples and specific embodiments. But this should not be understood as the scope of the above-mentioned subject matter of the utility model is limited to the following examples, and any technology realized based on the content of the utility model belongs to the scope of the utility model.

[0032] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0033] As shown in the accompanying drawings Figure 1 - the accompanying drawings Figure 7 ​​​​The three-way electromagnetic water valve shown includes a valve body and a magnetic assembly, the valve body includes an upper valve body 90 and a lower valve body 91, the magnetic assembly is arranged in the upper valve body 90, and the connection part of the upper valve body 90 and the lower valve body 91 adopts three-layer protection, that is, first fixed by a bolt, sealed by a sealing ring, and then welded by a laser, thereby preventing the leakage of the electromagnetic valve and the structural strength problem. The lower valve body 91 is provided with a water inlet 100, a first water outlet 101 and a second water outlet 102, the upper and lower movement of the connecting rod 12 drives the sealing pad 13 to move, thereby realizing the communication of the water inlet with the first water outlet or the water inlet with the second water outlet, the valve core 11 is arranged in the lower valve body 91, the connecting rod 12 is movably arranged on the valve core 11, the upper end of the connecting rod 12 penetrates out of the upper end of the valve core 11 and is connected with the magnetic assembly, the lower end of the connecting rod 12 penetrates out of the lower end of the valve core 12 and is connected with the sealing pad 13, the spring 16 is sleeved on the connecting rod 12, one end of the spring 16 abuts against the lower end of the valve core, and the other end of the spring 16 abuts against the connecting rod 12, two balance diaphragms 14 are arranged at the position close to the upper end of the valve core 11, the two balance diaphragms 14 are symmetrically arranged upward and downward, the two balance diaphragms 14 are arranged on the connecting rod 12, the outer circle of the two balance diaphragms 14 is fixed by the pressing ring 17, the connecting rod 12 has a connecting rod head 15, the connecting rod head 15 is located at the position between the two balance diaphragms 14, the balance diaphragm 14 is made of flexible material, and the balance diaphragm 14 can be deformed under the action of water pressure after being in contact with the connecting rod head 15. The balance diaphragm adopts radial sealing + axial sealing, which ensures the positioning and fixing of the balance diaphragm and solves the sealing problem at the same time.

[0034] From Figures 2-4 It can be seen that the balance diaphragm 14 includes a diaphragm body, the diaphragm body is integrally formed, the diaphragm body is in a whole disc structure, the diaphragm body has a center mounting hole 1, and the diaphragm body is mounted on the connecting rod 12 through the center mounting hole 1. The side wall of the center mounting hole 1 extends to one side of the diaphragm body along the axial direction to form a boss, the extension direction of the boss is the same as the inclination direction of the deformation part 3, and the height of the boss is greater than the maximum inclination height H of the deformation part 3.

[0035] The diaphragm body includes a first connecting part 2, a deformation part 3, a second connecting part 5 and a sealing part 6 from the center to the outside in sequence, the inner side of the first connecting part 2 is connected with the lower end of the side wall of the center mounting hole 1, the outer side of the first connecting part 2 is connected with the inner side of the deformation part 3, the outer side of the deformation part 3 is connected with the inner side of the second connecting part 5, the outer side of the second connecting part 5 is connected with the sealing part 6, and the sealing part 6 is embedded between the pressing ring and the valve core or between the pressing ring and the valve core. On the one hand, the sealing part 6 realizes the sealing of the valve core, and on the other hand, the sealing part 6 realizes the fixing of the outer circle of the diaphragm body. The sealing part 6 is in an up-down symmetric structure, and the thickness of the sealing part 6 is greater than the thickness of the diaphragm body.

[0036] The end face of the connecting rod head 15 comprises a flat portion and an inclined portion, the flat portion is arranged around the center of the connecting rod head 15, and the inclined portion is arranged around the flat portion, and the end of the inclined portion is arc-shaped; the two end faces of the connecting rod head 15 are symmetrically arranged, and the distance between the two inclined portions decreases from one side connected to the flat portion to the side away from the flat portion.

[0037] The deformation portion 3 is arranged to be inclined from the inner side to the outer side in the axial direction of the diaphragm body, so that the position of the inner side of the deformation portion 3 is lower than the position of the outer side of the deformation portion 3, and the maximum inclination height H of the deformation portion 3 is greater than the thickness L of the diaphragm body, and the thickness of the boss is greater than the maximum inclination height H of the deformation portion 3. The deformation portion 3 and the second connecting portion 4 are connected through an arc-shaped structure, which comprises a first arc surface structure 4 and a second arc surface structure 8, the first arc surface structure 4 and the second arc surface structure 8 are connected at their common tangent, that is, the connection between the first arc surface structure 4 and the second arc surface structure 8 is located at the tangent line of the first arc surface structure 4 and the second arc surface structure 8, and the radii of the first arc surface structure 4 and the second arc surface structure 8 are the same and the bending directions are opposite. The first arc surface structure 4 is matched with the arc-shaped end of the connecting rod head 15, so that when the connecting rod moves to the limit position, the end of the connecting rod head 15 is matched with the first arc surface structure 4 on the deformation portion 3, realizing the contact between the surfaces, and the load can be linearly transmitted better. The side of the deformation portion 3 facing the connecting rod head is matched with the end face of the corresponding position of the connecting rod head 15, so that when the connecting rod structure moves to the limit position, the side of the deformation portion 3 facing the connecting rod head is matched with the end face of the corresponding position of the connecting rod head, realizing the contact between the surfaces to transmit the load better.

[0038] At least part of the side of the first connecting portion 2 facing the connecting rod head 15 has a top abutting plane 21 abutting against the end face of the connecting rod head 15, and in the embodiment, the axial direction of the center mounting hole 1 in the drawing is the vertical direction, and the top abutting plane 21 is arranged in the horizontal direction in the embodiment. Of course, the top abutting plane 21 is mainly matched with the end face of the connecting rod head 15, so when the end face of the connecting rod head 15 at the position matched with the top abutting plane 21 is an inclined plane, the top abutting plane 21 is also correspondingly arranged as an inclined plane. The end face of the side of the first connecting portion 2 away from the connecting rod head of the connecting rod structure can be a flat surface or an inclined surface. The connection between the first connecting portion 2 and the side wall of the center mounting hole 1 is also connected through a circular arc.

[0039] From Figure 5 It can be seen that the center position of the lower end port of the valve core 11 is provided with a limiting ring 110, and the lower end of the connecting rod 12 penetrates through the limiting ring 110. The static iron core and the limiting ring 110 limit the upper and lower ends of the connecting rod respectively, which can inhibit the eccentricity problem of the electromagnetic valve, balance the diaphragm to have the self-centering effect, and ensure the stability of the movement of the connecting rod.

[0040] Three rib plates are distributed along the circumference of the outer periphery of the limiting ring 110 and the inner wall of the valve core 11, the three rib plates are arranged along the radial direction of the valve core 11, the three rib plates divide the lower end port of the valve core 11 into three areas, which are the first area 113, the second area 112 and the third area 111 respectively, the angle of the first area 113 is smaller than the angle of the second area 112, the angle of the second area 112 is the same as the angle of the third area 111, the first area 113 is close to the water inlet 100 of the valve body, and the second area 112 and the third area 111 are close to the first water outlet 101 of the valve body. On the one hand, the overall strength is improved, and on the other hand, when the electromagnetic valve is energized, the connecting rod moves downward, the water inlet 100 is communicated with the first water outlet 101, and when the water flows through the lower end port of the valve core, the flow rate of the water in the first area 113 is close to zero, and the water mainly flows into the first water outlet 101 through the second area 112 and the third area 111, realizing the consistency of flow resistance in different modes.

[0041] From Figure 2 As can be seen, the magnetic assembly includes a coil 31, a moving iron core 32, a static iron core 33 and a skeleton structure 37, the coil 31 is wound on the skeleton structure 37, the static iron core 33 is located above the valve core 11, the upper end of the connecting rod 12 passes through the static iron core 33 and is connected with the moving iron core 32, the moving iron core 32 and the static iron core 33 are matched by concave-convex structures, the angles of the concave-convex structures on the moving iron core 32 and the static iron core 33 are different, which solves the problem of adsorption not in place and lateral adsorption jam caused by electromagnetic valve eccentricity, and the height ratio of the moving iron core 32 and the static iron core 33 is 2:3. The coil 31 of the electromagnetic valve adopts a TVS tube, which is mainly used to protect the electromagnetic valve circuit from transient overvoltage damage, and the pin and the coil adopt resistance welding process, which has high production efficiency, good welding quality and is easy to automate. It also includes a magnetic isolation sleeve 34, the moving iron core 32 and the static iron core 33 are located in the magnetic isolation sleeve 34, the magnetic isolation sleeve 34 and the static iron core 33 are connected by three layers of protection, which are interference assembly, welding and 0-type coil sealing respectively, to ensure the reliability of the connection relationship and the exposed sealing. The skeleton structure is made of plastic material, which is located between the coil and the magnetic isolation sleeve, solves the problem of jamming of the moving iron core caused by deformation of the magnetic isolation sleeve during winding of the coil, can improve the winding force of the winding, improve the compactness of the coil winding, and improve the electromagnetic force.

[0042] A magnetic guide sleeve 35 is arranged between the coil 31 and the valve body, and a magnetic guide plate 36 is arranged at the lower end position of the skeleton structure 37, and the magnetic guide sleeve 35 and the magnetic guide plate 36 are both provided with magnetic guide holes.

[0043] Gaskets 131 are arranged at the upper end surface and the lower end surface of the sealing gasket 13, which ensures the sealing control deformation, solves the problems of falling off caused by large deformation of the sealing gasket under stress, jamming and abnormal sound caused by change of thread of the connecting rod, and improves the inner leakage performance.

[0044] When energized, the electromagnetic force dominates, the electromagnetic force is greater than the spring force and the water pressure resistance, the connecting rod 12 moves downward, the abutting plane 21 of the first connecting part on the balance diaphragm 14 first contacts the planar part of the end surface of the connecting rod head 15, as the connecting rod 12 continues to move downward, the contact area between the connecting rod head 15 and the balance diaphragm increases, at this time, the deformation part 3 and the arc-shaped structure connected with the second connecting part begin to deform, the connecting rod 12 continues to move downward until the end surface of the connecting rod head 15 is attached to the surface opposite to the deformation part of the diaphragm (see Figure 6 );When switching from energized to de-energized state, the position of the connecting rod 12 does not change at the moment before switching, that is, it still maintains the pressure balance state, and the connecting rod 12 is only subjected to the spring force, as the position of the connecting rod 12 changes, the spring force decreases, and the load transmitted by the balance diaphragm 14 to the connecting rod 12 will weaken (see Figure 8 ), At this time, it is impossible to achieve absolute pressure balance, but the spring force is still greater than the water pressure resistance, and the connecting rod further moves, the water pressure will decrease, weakening the influence of the decrease of the force transmission at the end of the balance diaphragm, the resultant force acting on the connecting rod during this process is consistent with the direction of movement, realizing the switching of the mode; When de-energized, the spring force dominates, the water pressure generates pressure on the lower sealing gasket 13, and the high rigidity of the sealing gasket 13 will transmit all the load to the connecting rod 12, the connecting rod 12 moves upward, the abutting plane 21 of the first connecting part on the balance diaphragm first contacts the planar part of the end surface of the connecting rod head 15, as the connecting rod continues to move upward, the contact area between the connecting rod head 15 and the balance diaphragm 14 increases, at this time, the deformation part 3 begins to deform, the connecting rod 12 continues to move upward until the end surface of the connecting rod head 15 is attached to the surface opposite to the deformation part of the diaphragm (see FIG. 7), at this time, the load is linearly transmitted to the connecting rod, realizing the pressure balance.

[0045] Through finite element simulation, the linear change of the load of the balance diaphragm can be and Figure 8 .

[0046] The embodiment realizes the mode switching of the electromagnetic valve at 8v voltage and 0.5Mpa; the maximum stroke of the reciprocating movement of the connecting rod is up to 5mm; the maximum resistance of the double diaphragms symmetrically installed is not more than 0.1n when the load is 4mm; the load pressure and the transmission pressure are highly linearized at the upper and lower limit positions; the load loss of the transmission is not more than 30% when the pressure at the limit position is 0.2Mpa and the connecting rod moves 2mm; the life of the load-free reciprocating movement is 8 million times, and the life of the reciprocating movement under 0.2Mpa pressure is 360w times; the cost of the diaphragm is low; the installation is simple and easy to operate.

[0047] The preferred embodiments of the present application are described above. It should be understood that those skilled in the art can make many modifications and changes without creative labor according to the concept of the present application. Therefore, any technical solutions obtained by logical analysis, reasoning or limited experiments on the basis of the prior art according to the concept of the present application shall be within the protection scope defined by the claims.

Claims

1. A three-way electromagnetic water valve comprising a valve body and a magnetic assembly, a valve core (11) is arranged in the valve body, a connecting rod (12) is movably arranged on the valve core (11), the upper end of the connecting rod (12) is connected with the magnetic assembly after penetrating through the upper end of the valve core (11), and the lower end of the connecting rod (12) is connected with a sealing gasket (13) after penetrating through the lower end of the valve core (11), characterized in that: Two balance diaphragms (14) are arranged in the valve core (11) near the upper end of the valve core (11), the two balance diaphragms (14) are symmetrically arranged, the two balance diaphragms (14) are arranged on the connecting rod (12), the outer circle of the balance diaphragm (14) is fixed, the connecting rod (12) has a connecting rod head (15), the connecting rod head (15) is located between the two balance diaphragms (14), the balance diaphragm (14) is made of flexible material, and the balance diaphragm (14) can be deformed under the action of water pressure after being in contact with the connecting rod head (15). ​ 2. The tee electromagnetic water valve according to claim 1, characterized in that: The balance diaphragm (14) comprises a diaphragm body, the diaphragm body is in a disc structure as a whole, the diaphragm body has a center mounting hole (1), and the diaphragm body comprises a first connecting part (2), a deformation part (3), a second connecting part (5) and a sealing part (6) from the center to the outside of the diaphragm body in sequence, the inner side of the first connecting part (2) is connected with the side wall of the center mounting hole (1), the outer side of the first connecting part (2) is connected with the inner side of the deformation part (3), the outer side of the deformation part (3) is connected with the inner side of the second connecting part (5), the outer side of the second connecting part (5) is connected with the sealing part (6), and the sealing part (6) is connected with the valve core (11).

3. The tee electromagnetic water valve according to claim 2, characterized in that: The deformation part (3) is arranged to be inclined to the axial direction of the diaphragm body from the inner side to the outer side of the deformation part (3).

4. The tee electromagnetic water valve according to claim 3, wherein: The end surface of the connecting rod head (15) comprises a flat part and an inclined part, the flat part is arranged around the center of the connecting rod head (15), the inclined part is arranged around the flat part, and the end of the inclined part is in an arc shape. At least part of the side of the first connecting part (2) facing the connecting rod head (15) has a top abutting plane (21) abutting with the flat part of the connecting rod head (15).

5. The tee electromagnetic water valve of claim 2, wherein: The deformation part (3) and the second connecting part (5) are connected through an arc structure, the arc structure comprises a first arc surface structure (4) and a second arc surface structure (8), the first arc surface structure (4) can be fitted with the end of the inclined part of the connecting rod head (15), the first arc surface structure (4) and the second arc surface structure (8) are connected at the common external tangent line thereof, and the radii of the first arc surface structure (4) and the second arc surface structure (8) are the same and the bending directions thereof are opposite.

6. The tee electromagnetic water valve of claim 3, wherein: The side wall of the center mounting hole (1) extends to one side of the diaphragm body along the axial direction of the center mounting hole (1) to form a boss, the extension direction of the boss is the same as the inclination direction of the deformation part (3), and the height of the boss is greater than the maximum inclination height H of the deformation part (3).

7. The tee electromagnetic water valve of claim 1, wherein: A limiting ring (110) is arranged at the center position of the lower end port of the valve core (11), and the lower end of the connecting rod (12) penetrates through the limiting ring (110).

8. The tee electromagnetic water valve according to claim 7, characterized in that: Three rib plates are distributed along the circumference between the outer circumference of the limiting ring (110) and the inner wall of the valve core (11), the three rib plates are arranged along the radial direction of the valve core (11), the three rib plates divide the lower end port of the valve core (11) into three areas, which are the first area (113), the second area (112) and the third area (111) respectively, the angle of the first area (113) is smaller than that of the second area (112), the angle of the second area (112) is the same as that of the third area (111), the first area (113) is close to the water inlet (100) of the valve body, and the second area (112) and the third area (111) are close to the first water outlet (101) of the valve body.

9. The tee electromagnetic water valve according to claim 8, characterized in that: The magnetic assembly comprises a coil (31), a moving iron core (32), a static iron core (33) and a framework structure (37), the coil (31) is wound on the framework structure (37), the static iron core (33) is located above the valve core (11), the upper end of the connecting rod (12) is connected with the moving iron core (32) after penetrating through the static iron core (33), the moving iron core (32) and the static iron core (33) are matched by concave-convex structure, and the height ratio of the moving iron core (32) to the static iron core (33) is 2:

3.

10. The tee electromagnetic water valve according to claim 9, characterized in that: A magnetic conducting sleeve (35) is arranged between the coil (31) and the valve body, and a magnetic conducting plate (36) is arranged at the lower end position of the framework structure (37), and the magnetic conducting sleeve (35) and the magnetic conducting plate (36) are both provided with magnetic conducting holes.

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