Thermal management electromagnetic water valve

Abstract

The invention relates to a thermal management electromagnetic water valve, and relates to the technical field of valves. The thermal management electromagnetic water valve comprises a valve cover, an upper cover, an upper cover sealing gasket, a valve body, a reversing rod, a base, a valve element, an inner cover, an electromagnetic coil and an outer cover. The front section of the reversing rod is guided and supported by a sliding guide groove of the valve cover, the rear section of the reversing rod is guided and supported by the valve element, and the middle section of the reversing rod is guided and supported by a cylinder at the rear end of the base, so that the reversing rod is always kept horizontal in a moving state, and the reversing rod is prevented from inclining to influence the sealing effect; and meanwhile, the upper cover sealing gasket assembly and the reversing rod sealing gasket which are manufactured through the double-shot molding technology also solve the problems that an internal sealing piece in the thermal management electromagnetic water valve is poor in sealing effect and the sealing piece is prone to falling off.

Description

Technical Field

[0001] The present invention relates to the technical field of solenoid valves, and more particularly to a thermal management solenoid water valve for controlling a flow path and flow rate of a coolant. Background Art

[0002] Solenoid valves are basic automation components used to control fluids. They are actuators and are used in industrial control systems to adjust the direction, flow, speed and other parameters of the medium. Solenoid valves can be used with different circuits to achieve the desired control, and the accuracy and flexibility of the control can be guaranteed. Solenoid water valves use water as the working medium and can automatically or remotely control the on and off of water medium pipelines. Most of the existing solenoid water valves are integral water valves, that is, the valve body, valve core and electromagnetic coil parts are mostly integrated, with large structural dimensions and many leakage problems caused by sealing problems.

[0003] The automotive thermal management solenoid water valve controls the flow path and flow rate of the coolant to regulate the temperature inside the engine and vehicle. When the water valve is open, the coolant can flow through the radiator to cool down, and then be sent to the cylinder water jacket through the water pump; when the water valve is closed, the coolant flows directly through the cylinder water jacket without passing through the radiator, thereby reducing the heat dissipation effect. At present, the solenoid water valve also plays an important role in the thermal management system of new energy vehicles. By accurately adjusting the flow rate of coolant in different pipelines, the power consumption of the water pump is optimized and the working environment of the battery is improved. The thermal management solenoid water valve in the prior art is not only complex in structure, but also the sealing effect of the seal inside the solenoid water valve is poor during use, and it is easy to fall off, affecting the use of the solenoid water valve. Summary of the invention

[0004] In order to solve the above problems existing in the prior art, an object of the present invention is to provide a thermal management electromagnetic water valve.

[0005] The thermal management electromagnetic water valve of the present invention comprises a valve cover, an upper cover, an upper cover sealing gasket, a valve body, a reversing rod, a base, a valve core, an inner cover, an electromagnetic coil and an outer cover; wherein: the upper cover and the upper cover sealing gasket constitute an upper cover sealing gasket assembly; the upper cover sealing gasket assembly is obtained by integrally molding the upper cover and the upper cover sealing gasket through a two-color injection molding process; the reversing rod comprises a reversing rod front section, a reversing rod middle section and a reversing rod rear section, the diameter of the reversing rod middle section is larger than the diameters of the reversing rod front section and the reversing rod rear section; a reversing rod sealing gasket seat is provided on the reversing rod middle section, and a reversing rod sealing gasket is provided on the reversing rod sealing gasket seat; the reversing rod and the reversing rod sealing gasket are integrally molded through a two-color injection molding process.

[0006] In which, the reversing rod is arranged in the valve body and the inner cover, the front section of the reversing rod is located in the front end internal space of the valve body, and the upper cover sealing gasket assembly is arranged on the front section of the reversing rod; a sliding guide groove is arranged in the middle of the inner surface of the valve cover, and the sliding guide groove cooperates with the front section of the reversing rod to form a sliding guide structure; the rear section of the reversing rod is arranged in the valve core, and a spring is arranged on the reversing rod body between the valve core and the rear end cylinder of the base, and the valve core and the rear end cylinder of the base are both provided with spring mounting grooves that cooperate with the spring.

[0007] The bottom of the valve body is provided with a first inlet and a second inlet, the upper part of the valve body is provided with an outlet, the interior of the valve body is provided with a first internal channel communicating between the first inlet and the outlet, and a second internal channel communicating between the second inlet and the outlet; the interior of the valve body is provided with a first sealing end surface communicating with the first internal channel and a second sealing end surface communicating with the second internal channel; the valve cover is provided at the front end of the valve body; The outer cover is sleeved outside the electromagnetic coil, and the inner cover is arranged inside the electromagnetic coil and the outer cover, the valve core is arranged at the rear end of the inner cover, the rear end cylinder of the base is arranged at the front end of the inner cover, and the valve core cooperates with the cylinder at the rear end of the base; the mounting surface at the front end of the outer cover, the base and the rear end of the valve body are tightly connected; Wherein, when the electromagnetic coil is energized, the valve core pushes the reversing rod to move toward the direction of the valve body and makes the reversing rod sealing gasket contact and seal with the first sealing end surface of the valve body, thereby closing the first internal channel, and at the same time makes the spring compressed toward the rear end cylinder of the base, the second internal channel is opened, and the second inlet is connected to the outlet; when the electromagnetic coil is de-energized, under the action of the restoring force of the spring, the reversing rod moves toward the direction of the inner cover, so that the upper cover sealing gasket assembly contacts and seals with the second sealing end surface of the valve body, thereby closing the second internal channel, and the first inlet is connected to the outlet.

[0008] The upper cover is made of modified PMMA resin, the upper cover sealing gasket is made of TPV resin, and the upper cover sealing gasket assembly is prepared by integral molding through a two-color injection molding process.

[0009] The reversing rod is made of modified PMMA resin, and the reversing rod sealing pad is made of TPV resin and is integrally formed through a two-color injection molding process.

[0010] The modified PMMA resin is obtained by blending 90wt% of PMMA resin, 5wt% of ASA resin and 5wt% of SMA resin and melt-extruding and granulating through a screw extruder at a speed of 300-500rpm and a temperature of 200-230°C.

[0011] Wherein, a guide step is provided at the front end of the valve body, and the valve cover is installed and matched with the valve body through the guide step.

[0012] Wherein, the valve cover and the valve body are sealed and fixed by laser welding.

[0013] Wherein, a sealing gasket is arranged between the front surface of the base and the rear end of the valve body.

[0014] Wherein, an O-ring is arranged between the rear surface of the base and the front surface of the inner cover.

[0015] Compared with the prior art, the thermal management electromagnetic water valve of the present invention has the following beneficial effects: In the thermal management electromagnetic water valve of the present invention, the sealing gasket is integrally formed by a two-color injection molding process, which not only ensures the sealing effect between the sealing end face of the valve body, but also solves the problems of poor sealing effect of internal seals and easy falling off of seals in the thermal management electromagnetic water valve; the front section, middle section and rear section of the reversing rod can be respectively supported by the sliding guide groove, the rear end cylinder of the base and the valve core guide, which can ensure that the reversing rod always remains horizontal in the moving state, and easily avoids the inclination of the reversing rod affecting the sealing effect between the sealing gasket and the sealing end face of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an exploded structural diagram of the thermal management electromagnetic water valve of the present invention; Figure 2 It is a disassembled structural diagram of a reversing rod and a reversing rod sealing gasket in a thermal management electromagnetic water valve of the present invention; Figure 3 It is a disassembled structural diagram of a reversing rod and a reversing rod sealing gasket in a thermal management electromagnetic water valve of the present invention; Figure 4 It is a cross-sectional structural diagram of the thermal management electromagnetic water valve of the present invention; Figure 5 This is a diagram of the water circuit state of the thermal management electromagnetic water valve of the present invention when it is powered on; Figure 6 This is a water circuit state diagram of the thermal management electromagnetic water valve of the present invention when it is powered off.

[0017] The meanings of the various reference numerals in the figure are respectively: 1-valve cover, 2-upper cover, 3-upper cover sealing gasket, 4-valve body, 5-valve body sealing gasket, 6-self-tapping screw, 7-reversing rod sealing gasket, 8-reversing rod, 81-reversing rod front section, 82-reversing rod middle section, 83-reversing rod rear section, 84-reversing rod sealing gasket seat, 9-sealing gasket, 10-base, 11-O-ring, 12-spring, 13-valve core, 14-inner cover, 15-electromagnetic coil, 16-outer cover, 17-first inlet, 18-second inlet, 19-outlet, 20-sliding guide groove, 21-first sealing end face, 22-second sealing end face. DETAILED DESCRIPTION

[0018] The thermal management electromagnetic water valve of the present invention will be further described below in conjunction with specific embodiments to help those skilled in the art to have a more complete, accurate and in-depth understanding of the technical solution of the present invention.

[0019] like Figure 1-4 As shown below ( Figure 1 The left side shown is the front, with Figure 1 The right side shown is the rear side, with Figure 1 The bottom is shown below. Figure 1The upper part shown is the upper part), the thermal management electromagnetic water valve of this embodiment includes a valve cover 1, an upper cover 2, an upper cover gasket 3, a valve body 4, a reversing rod 8, a base 10, a valve core 13, an inner cover 14, an electromagnetic coil 15 and an outer cover 16. The upper cover 2 and the upper cover gasket 3 constitute an upper cover gasket assembly. The bottom of the valve body 4 is provided with a first inlet 17 and a second inlet 18, and the first inlet 17 and the second inlet 18 are arranged side by side. The upper part of the valve body 4 is provided with an outlet 19, and the bottom of the valve body 4 is also provided with a valve body gasket 5. The inside of the valve body 4 is provided with a first internal channel connected between the first inlet 17 and the outlet 19 and a second internal channel connected between the second inlet 18 and the outlet 19. The inside of the valve body 4 is provided with a first sealing end face 21 connected to the first internal channel and a second sealing end face 22 connected to the second internal channel. The valve cover 1 is arranged at the front end of the valve body 4, and a guide step is arranged at the front end of the valve body 4. The valve cover 1 is installed and matched with the valve body 4 through the guide step, and the valve cover 1 and the valve body 4 are sealed and fixed by laser welding. The outer cover 16 is sleeved outside the electromagnetic coil 15, and the inner cover 14 is arranged inside the electromagnetic coil 15 and the outer cover 16. The valve core 13 is arranged at the rear end of the inner cover 14, and the rear end cylinder of the base 10 is arranged at the front end of the inner cover 14. The valve core 13 and the rear end cylinder of the base 10 are matched. The mounting surface at the front end of the outer cover 16, the base 10 and the rear end of the valve body 4 are fastened and connected by self-tapping screws 6. A sealing gasket 9 is arranged between the front surface of the base 10 and the rear end of the valve body 4, and an O-ring 11 is arranged between the rear surface of the base 10 and the front surface of the inner cover 14. The reversing rod 8 includes a reversing rod front section 81, a reversing rod middle section 82 and a reversing rod rear section 83. The diameter of the reversing rod middle section 82 is larger than the diameters of the reversing rod front section 81 and the reversing rod rear section 83. A reversing rod sealing pad seat 84 is provided on the reversing rod middle section 82, and a reversing rod sealing pad 7 is provided on the reversing rod sealing pad seat 84. The reversing rod 8 is arranged in the valve body 4 and the inner cover 14. The reversing rod front section 81 is located in the front end internal space of the valve body 4, and the upper cover sealing pad assembly is arranged (for example, by welding, etc.) on the reversing rod front section 81. A sliding guide groove 20 is provided in the middle of the inner surface of the valve cover 1, and the sliding guide groove 20 cooperates with the reversing rod front section 81 to form a sliding guide structure. The reversing rod rear section 83 is arranged in the valve core 13, and a spring 12 is arranged on the rod body of the reversing rod 8 adjacent to the valve core 13 and the rear end cylinder of the base 10, and a spring installation groove matching with the spring 12 is arranged in the valve core 13 and the rear end cylinder of the base 10. Figure 5As shown, when the electromagnetic coil 15 is energized, the valve core pushes the reversing rod 8 to move toward the valve body 4 and makes the reversing rod sealing gasket 7 contact and seal with the first sealing end surface 21 of the valve body 4, thereby closing the first internal channel, and at the same time compressing the spring 12 toward the rear end cylinder of the base. At this time, the second internal channel is opened, and the second inlet 18 is connected to the outlet 19. Figure 6 As shown, when the electromagnetic coil 15 is powered off, under the restoring force of the spring 12, the reversing rod 8 moves toward the inner cover 14, so that the upper cover sealing gasket assembly contacts and seals with the second sealing end face 22 of the valve body 4, thereby closing the second internal channel. At this time, the second inlet 18 and the outlet 19 are closed, and the first inlet 17 and the outlet 19 are connected. In the thermal management electromagnetic water valve of the present invention, the reversing rod front section 81 of the reversing rod 8 is guided and supported by the sliding guide groove 20 on the inner surface of the valve cover 1, the reversing rod rear section 83 of the reversing rod 8 is guided and supported by the valve core 13, and the reversing rod middle section 82 of the reversing rod 8 can be guided and supported by the rear end cylinder of the base 10, so as to ensure that the reversing rod 8 always remains horizontal in the moving state, thereby preventing and avoiding the reversing rod from tilting during use to affect the sealing effect between the reversing rod sealing gasket and the upper cover sealing gasket assembly and the sealing end face.

[0020] In the present invention, the upper cover 2 and the upper cover gasket 3 are integrally formed by a two-color injection molding process to obtain the upper cover gasket assembly. The reversing rod 8 and the reversing rod gasket 7 are integrally formed by a two-color injection molding process. The upper cover gasket assembly and the reversing rod gasket 7 prepared by the two-color injection molding process can not only ensure the sealing effect between the sealing end face of the valve body 4, but also solve the problems of poor sealing effect of internal seals and easy falling off of seals in thermal management electromagnetic water valves. The two-color injection molding process is a process method in which different plastic and / or resin raw materials are injected into the mold cavity in sequence by two sets of injection systems respectively set to obtain a component composed of two materials. In the two-color injection molding process, the two raw materials need to be injected sequentially and cooled in turn. After molding, the interface between the two is clear. In order to ensure the good appearance quality of the component and high bonding strength, it is necessary to reasonably control the molding materials and process parameter conditions. TPV is the abbreviation of thermoplastic vulcanized rubber, which is an elastomeric material composed of highly vulcanized rubber particles dispersed in a continuous plastic phase. TPV has the physical functional properties of rubber at room temperature, and the melt flow and processing characteristics of thermoplastics at high temperatures, and is easy to mold and process. In the present invention, TPV material is selected as the material of the upper cover gasket 3 and the reversing rod gasket 7. It not only has excellent high and low temperature sealing performance, but also has high injection molding quality, uniform volume shrinkage, and prevents the generation of warping, micro-marks, etc. In the present invention, the upper cover gasket assembly can be welded to the reversing rod front section 81 by ultrasonic welding. In order to improve the welding strength and prevent the upper cover gasket assembly from falling off from the reversing rod front section 81, the present invention uses modified PMMA resin as the material of the upper cover 2 and the reversing rod 8. The modified PMMA resin is obtained by blending 90wt% of PMMA resin, 5wt% of ASA resin and 5wt% of SMA resin and melt-extruding and granulating them through a screw extruder at a speed of 300-500rpm and a temperature of 200-230°C. The weight average molecular weight of the PMMA resin is about 50,000, the weight average molecular weight of the ASA resin is about 80,000, and the weight average molecular weight of the SMA resin is about 5,500. The upper cover 2 adopts the above-mentioned modified PMMA resin, and the upper cover sealing gasket 3 adopts TPV resin (brand 101-55W185) and is integrally formed by a two-color injection molding process to prepare an upper cover sealing gasket assembly. The two-color injection molding process adopts a rotary injection molding machine for integral injection molding. The mold temperature of the upper cover 2 molding is 90°C, the melt temperature is 285°C-305°C, and the injection time is 0.3-0.5 seconds; the mold temperature of the upper cover sealing gasket 3 is 50°C, the melt temperature is 255-275°C, and the injection time is 0.2-0.3 seconds.The reversing rod 8 is made of the above-mentioned PMMA resin, and the reversing rod sealing gasket 7 is made of TPV resin (brand 101-55W185) and is integrally formed by a two-color injection molding process. The two-color injection molding process is integrally formed by a rotary shaft injection molding machine. The mold temperature of the reversing rod 8 is 120°C, the melt temperature is 315°C-325°C, and the injection time is 0.6-1.0 seconds; the mold temperature of the reversing rod sealing gasket 7 is 50°C, the melt temperature is 270-285°C, and the injection time is 0.1-0.2 seconds. The upper cover sealing gasket assembly is fixed to the reversing rod front section 81 by ultrasonic welding, the ultrasonic frequency is 20kHz, the welding time is 0.3sec, the holding time is 0.5sec, the welding interface is flat and no particles are precipitated, and the welding pull-out force can reach more than 230N; if unmodified PMMA resin is used or only PMMA resin and ASA resin are used for blending and modification, the welding pull-out force is not higher than 165N.

[0021] For ordinary technicians in this field, the specific embodiments are only illustrative descriptions of the present invention. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solutions of the present invention, or the dog speed and technical solutions of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A thermal management electromagnetic water valve, characterized in that: It includes a valve cover, an upper cover, an upper cover sealing gasket, a valve body, a reversing rod, a base, a valve core, an inner cover, an electromagnetic coil and an outer cover; the upper cover and the upper cover sealing gasket constitute an upper cover sealing gasket assembly; the upper cover sealing gasket assembly is obtained by integrally molding the upper cover and the upper cover sealing gasket through a two-color injection molding process; the reversing rod includes a reversing rod front section, a reversing rod middle section and a reversing rod rear section, the diameter of the reversing rod middle section is larger than the diameters of the reversing rod front section and the reversing rod rear section; a reversing rod sealing gasket seat is provided on the reversing rod middle section, and a reversing rod sealing gasket is provided on the reversing rod sealing gasket seat; the reversing rod and the reversing rod sealing gasket are integrally molded through a two-color injection molding process.

2. The thermal management electromagnetic water valve according to claim 1, characterized in that: The reversing rod is arranged in the valve body and the inner cover, the front section of the reversing rod is located in the front end internal space of the valve body, and the upper cover sealing gasket assembly is arranged on the front section of the reversing rod; a sliding guide groove is arranged in the middle of the inner surface of the valve cover, and the sliding guide groove cooperates with the front section of the reversing rod to form a sliding guide structure; the rear section of the reversing rod is arranged in the valve core, and a spring is arranged on the reversing rod body between the valve core and the rear end cylinder of the base, and the valve core and the rear end cylinder of the base are both provided with spring mounting grooves that cooperate with the spring.

3. The thermal management electromagnetic water valve according to claim 2, characterized in that: The bottom of the valve body is provided with a first inlet and a second inlet, the upper part of the valve body is provided with an outlet, the interior of the valve body is provided with a first internal channel communicating between the first inlet and the outlet, and a second internal channel communicating between the second inlet and the outlet; the interior of the valve body is provided with a first sealing end surface communicating with the first internal channel and a second sealing end surface communicating with the second internal channel; the valve cover is provided at the front end of the valve body.

4. The thermal management electromagnetic water valve according to claim 3, characterized in that: The outer cover is sleeved outside the electromagnetic coil, and the inner cover is arranged inside the electromagnetic coil and the outer cover, the valve core is arranged at the rear end of the inner cover, and the rear end cylinder of the base is arranged at the front end of the inner cover, and the valve core and the cylinder at the rear end of the base are matched; the mounting surface at the front end of the outer cover, the base and the rear end of the valve body are tightly connected.

5. The thermal management electromagnetic water valve according to claim 4, characterized in that: When the electromagnetic coil is energized, the valve core pushes the reversing rod to move toward the direction of the valve body and makes the reversing rod sealing gasket contact and seal with the first sealing end surface of the valve body, thereby closing the first internal channel, and at the same time compresses the spring toward the rear end cylinder of the base, the second internal channel opens, and the second inlet is connected to the outlet; when the electromagnetic coil is de-energized, under the action of the restoring force of the spring, the reversing rod moves toward the direction of the inner cover, so that the upper cover sealing gasket assembly contacts and seals with the second sealing end surface of the valve body, thereby closing the second internal channel, and the first inlet is connected to the outlet.

6. The thermal management electromagnetic water valve according to any one of claims 1 to 5, characterized in that: The upper cover is made of modified PMMA resin, the upper cover sealing gasket is made of TPV resin, and the upper cover sealing gasket assembly is prepared by integral molding through a two-color injection molding process.

7. The thermal management electromagnetic water valve according to claim 6, characterized in that: The reversing rod is made of modified PMMA resin, and the reversing rod sealing pad is made of TPV resin and is integrally formed through a two-color injection molding process.

8. The thermal management electromagnetic water valve according to claim 7, characterized in that: The modified PMMA resin is obtained by blending 90 wt % of PMMA resin, 5 wt % of ASA resin and 5 wt % of SMA resin and melt-extruding and granulating the mixture through a screw extruder at a rotation speed of 300-500 rpm and a temperature of 200-230° C.

9. The thermal management electromagnetic water valve according to claim 1, characterized in that: A guide step is provided at the front end of the valve body, and the valve cover is installed and matched with the valve body through the guide step.

10. The thermal management electromagnetic water valve according to claim 1, characterized in that: The valve cover and the valve body are sealed and fixed by laser welding.

11. The thermal management electromagnetic water valve according to claim 1, characterized in that: A sealing gasket is arranged between the front surface of the base and the rear end of the valve body.

12. The thermal management electromagnetic water valve according to claim 1, characterized in that: An O-ring is arranged between the rear surface of the base and the front surface of the inner cover.

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