An electromagnetic valve core with automatic pressure relief capability

Abstract

The application discloses an electromagnetic valve core with automatic pressure relief capacity, which comprises a core component, a buffer assembly for protecting the core is arranged at the upper end of the core component, and a pressure relief assembly for automatic pressure relief is arranged in the core component; the core component comprises a movable core, a water stop piston for closing a water outlet is connected to the bottom of the movable core, and a sealing ring for sealing the water outlet is embedded in the lower end of the water stop piston. Through the arranged pressure relief channel and automatic pressure relief unit, the radial hole can first transmit the high-pressure water source to the inside of the transfer pipeline through the axial hole, the water source in the transfer pipeline pushes the pressure relief plate upward, when the pressure relief plate moves upward to the channel position of the pressure relief secondary pipe, the high-pressure water source is discharged to a specified area through the pressure relief secondary pipe, so that the automatic pressure relief of the electromagnetic valve core is effectively realized, and the resistance received by the piston is reduced, and the working efficiency of the piston is improved.

Description

Technical Field

[0001] This invention relates to the field of solenoid valve core technology, and in particular to a solenoid valve core with automatic pressure relief capability. Background Technology

[0002] Solenoid valves are electromagnetically controlled industrial devices, fundamental components of automation systems used to control fluids. They are actuators, not limited to hydraulic or pneumatic systems. Used in industrial control systems to adjust the direction, flow rate, speed, and other parameters of the medium. Solenoid valves can be used with different circuits to achieve the desired control, ensuring both precision and flexibility.

[0003] Currently, most existing solenoid valves consist of a valve cover, metal sleeve, coil assembly, iron core, and valve body. However, the solenoid valve iron core has the following problems: 1. The clamping spring on the solenoid valve iron core is used to support the piston and ensure that the piston seals the outlet. However, after long-term use, the clamping spring will experience elasticity decay, which reduces the positioning effect of the clamping spring on the piston, thus reducing the sealing effect of the piston. Moreover, the clamping spring is usually fixedly connected to the piston, making it inconvenient to disassemble, requiring the replacement of the entire iron core component, which increases the operating cost; 2. In the closed state, the piston connected to the iron core of the existing normally closed solenoid valve is subjected to high water pressure, which causes the valve core to require a larger electromagnetic force to open, potentially leading to start-up failure. Furthermore, opening downstream equipment during maintenance poses a risk. Therefore, how to provide a solenoid valve iron core with automatic pressure relief capability is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] One object of the present invention is to provide a solenoid valve core with automatic pressure relief capability to solve the problems mentioned in the background art.

[0005] According to an embodiment of the present invention, a solenoid valve core with automatic pressure relief capability includes:

[0006] The iron core component has a buffer assembly at its upper end for protecting the iron core, and a pressure relief assembly for automatic pressure relief is provided inside the iron core component.

[0007] The core component includes a movable core. A water-stop piston for closing the outlet is connected to the bottom of the movable core. A sealing ring for sealing the outlet is embedded in the lower end of the water-stop piston. A positioning spring for pushing the water-stop piston is sleeved on the outside of the lower end of the movable core. An auxiliary block is fixedly connected to the lower end of the positioning spring. The contact parts of the auxiliary block and the water-stop piston are connected by screw threads. An outer limiting ring that slides on the surface of the movable core is connected to the upper end of the positioning spring. An alignment groove is opened on the left arc surface of the outer limiting ring.

[0008] The pressure relief assembly includes a pressure relief channel, an automatic pressure relief unit, and a detection unit. The pressure relief channel is connected to the chamber of the automatic pressure relief unit, and the detection unit is installed on the top of the automatic pressure relief unit.

[0009] As a preferred embodiment of the present invention, the buffer assembly includes an inner groove, which is located at the center of the upper end face of the movable iron core. The inner wall of the inner groove is threaded with a buffer pad for buffering the iron core. The buffer pad is made of rubber, and a through hole is provided at the center of the upper surface of the buffer pad.

[0010] As a preferred embodiment of the present invention, the pressure relief channel includes an axial hole, which is located at the center of the movable iron core along its axis. The lower end of the movable iron core has a plurality of radial holes arranged in a circumferential array, and each radial hole communicates with the chamber at the lower end of the axial hole.

[0011] As a preferred embodiment of the present invention, the automatic pressure relief unit includes a pressure relief main pipe, the lower surface of which is threadedly connected to the inner wall of the upper end of the axial hole, an inner retaining ring connected to the inner wall of the upper end of the axial hole is provided directly below the pressure relief main pipe, the upper end of the pressure relief main pipe is connected to a transfer pipe, a return spring is fixedly connected to the bottom surface of the inner cavity of the transfer pipe, the upper end of the return spring is connected to a pressure relief plate that slides against the inner wall of the transfer pipe, and the left side surface of the upper end of the transfer pipe is connected to a pressure relief secondary pipe for pressure relief.

[0012] As a preferred embodiment of the present invention, the detection unit includes a detection spring and a miniature weighing sensor. The lower end of the detection spring is fixedly connected to the upper surface of the pressure relief plate, and the lower surface of the miniature weighing sensor is threadedly connected to the inner wall of the upper end of the transfer pipe.

[0013] As a preferred embodiment of the present invention, a metal sleeve for limiting the position is movably sleeved on the surface of the upper end of the movable iron core.

[0014] As a preferred embodiment of the present invention, the lower end of the metal sleeve is threaded with a valve cover for sealing off the water flow above.

[0015] As a preferred embodiment of the present invention, an alignment stop is connected to the bottom of the inner wall on the left side of the valve cover.

[0016] As a preferred embodiment of the present invention, the upper end of the metal sleeve is fixedly mounted with a coil assembly for providing mechanical force by bolts.

[0017] As a preferred embodiment of the present invention, a valve body that contacts the iron core component is provided directly below the valve cover, with the right end of the valve body being the water inlet and the left end being the drain outlet.

[0018] The beneficial effects of this invention are:

[0019] This invention utilizes an auxiliary block and screw. First, rotating the screw in the forward direction allows for easy connection between the auxiliary block and the piston, thus quickly installing the positioning spring. Then, rotating the screw in the reverse direction allows for quick disassembly of the positioning spring. This improves the maintenance speed of the iron core, avoids resource waste, and significantly reduces the operating cost of the iron core.

[0020] This invention utilizes a positioning groove and a positioning stop to first cause the positioning groove to misalign with the outer limit ring by rotating the movable iron core. This prevents the iron core from falling off automatically when the valve body is opened, effectively reducing the risk of damage from the iron core falling to the ground and thus providing excellent protection for the solenoid valve iron core. Then, rotating the movable iron core will cause the positioning spring and the outer limit ring to rotate simultaneously. When the position of the positioning groove on the outer limit ring aligns with the positioning stop after rotation, the movable iron core can be pulled down to disassemble the iron core, improving the user experience of the solenoid valve iron core.

[0021] This invention, through its pressure relief channel and automatic pressure relief unit, allows high-pressure water to be transmitted from the radial hole to the interior of the transfer pipe via the axial hole. The water inside the transfer pipe pushes the pressure relief plate upwards. When the pressure relief plate moves upwards to the channel position of the pressure relief secondary pipe, the high-pressure water is discharged to the designated area through the pressure relief secondary pipe. This effectively achieves automatic pressure relief of the solenoid valve core, reduces the resistance to the piston, accelerates the piston's working efficiency, and effectively reduces the risk of water spraying from downstream equipment during maintenance.

[0022] This invention utilizes a detection unit. First, the upward movement of the pressure relief plate causes the detection spring to move upward. When the detection spring contacts the miniature weighing sensor, the upward thrust of the pressure relief plate can be detected. This allows users to record and analyze the detection results in a timely manner, thus greatly improving the user experience of the solenoid valve core.

[0023] This invention, through the setting of a transfer pipe, first controls the transfer pipe to reverse, which can drive the pressure relief main pipe to reverse. When the lower end of the pressure relief main pipe is fully disengaged from the inner cavity of the axial hole, the automatic pressure relief unit and the pressure relief channel can be quickly disassembled. Then, controlling the transfer pipe to rotate forward can enable the automatic pressure relief unit and the pressure relief channel to be reinstalled, further improving the practicality of the solenoid valve core. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0025] Figure 1 This is a schematic diagram of the structure of an electromagnetic valve core with automatic pressure relief capability proposed in this invention;

[0026] Figure 2 This is an exploded view of the structure of a core component, buffer assembly, and automatic pressure relief assembly with automatic pressure relief capability proposed in this invention.

[0027] Figure 3 This is a schematic diagram of an electromagnetic valve structure with an adaptable iron core component and an automatic pressure relief assembly that is proposed in this invention.

[0028] Figure 4 This invention proposes a method with automatic pressure relief capability. Figure 3 The front view.

[0029] Figure 5 This invention proposes a method with automatic pressure relief capability. Figure 3 A structural diagram from the bottom view.

[0030] Figure 6 This invention proposes a method with automatic pressure relief capability. Figure 4 Front sectional view.

[0031] Figure 7 This invention proposes a method with automatic pressure relief capability. Figure 6 A three-dimensional image.

[0032] Figure 8 This invention proposes a method with automatic pressure relief capability. Figure 7 A structural diagram from the bottom view.

[0033] Figure 9 This is a breakdown diagram of the components of a solenoid valve with automatic pressure relief capability proposed in this invention.

[0034] Figure 10 This invention proposes a method with automatic pressure relief capability. Figure 9 A structural diagram from the bottom view.

[0035] Figure 11 This is a schematic diagram of the structure of a valve cover with automatic pressure relief capability proposed in this invention, viewed from below.

[0036] Figure 12 This invention proposes a method with automatic pressure relief capability. Figure 1 Enlarged view of point A in the middle.

[0037] Figure 13 This invention proposes a method with automatic pressure relief capability. Figure 1 Enlarged view of point B in the middle.

[0038] Figure 14 This invention proposes a method with automatic pressure relief capability. Figure 7 Enlarged view of point C in the middle.

[0039] Figure 15 This invention proposes a method with automatic pressure relief capability. Figure 7 Enlarged view of point D in the middle.

[0040] Figure 16 This invention proposes a method with automatic pressure relief capability. Figure 7 Enlarged view of point E in the middle.

[0041] Figure 17 This invention proposes a method with automatic pressure relief capability. Figure 8 Enlarged view of point F in the middle.

[0042] In the diagram: 1. Iron core component; 101. Movable iron core; 102. Water-stopping piston; 103. Sealing ring; 104. Positioning spring; 105. Auxiliary block; 106. Screw; 107. Outer limiting ring; 108. Alignment groove; 109. Alignment stop block; 2. Buffer assembly; 201. Inner groove; 202. Buffer pad; 3. Pressure relief assembly; 301. Axial hole; 302. Radial hole; 303. Pressure relief main pipe; 304. Inner retaining ring; 305. Transfer pipe; 306. Return spring; 307. Pressure relief plate; 308. Detection spring; 309. Miniature load cell; 310. Pressure relief secondary pipe; 4. Metal sleeve; 5. Valve cover; 6. Coil assembly; 7. Valve body. Detailed Implementation

[0043] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0044] refer to Figures 1-17 A solenoid valve core with automatic pressure relief capability.

[0045] This embodiment includes: a core component 1, a buffer assembly 2 for protecting the core is provided at the upper end of the core component 1, and a pressure relief assembly 3 for automatic pressure relief is provided inside the core component 1; the core component 1 includes a movable core 101, a water-stop piston 102 for closing the outlet is connected to the bottom of the movable core 101, a sealing ring 103 for sealing the outlet is embedded at the lower end of the water-stop piston 102, a positioning spring 104 for pushing the water-stop piston 102 is sleeved on the outside of the lower end of the movable core 101, an auxiliary block 105 is fixedly connected to the lower end of the positioning spring 104, the contact parts of the auxiliary block 105 and the water-stop piston 102 are threadedly connected by screws 106, and an outer limiting ring 107 that slides on the surface of the movable core 101 is connected to the upper end of the positioning spring 104, and an alignment groove 108 is provided on the left arc surface of the outer limiting ring 107;

[0046] The screw 106 and auxiliary block 105 are designed so that rotating the screw 106 in the forward direction can easily connect the auxiliary block 105 to the water-stop piston 102, thus quickly completing the installation of the positioning spring 104. Then, rotating the screw 106 in the reverse direction can quickly disassemble the positioning spring 104, thereby improving the maintenance speed of the iron core.

[0047] The pressure relief assembly 3 includes a pressure relief channel, an automatic pressure relief unit, and a detection unit. The pressure relief channel is connected to the chamber of the automatic pressure relief unit, and the detection unit is installed on the top of the automatic pressure relief unit.

[0048] The buffer assembly 2 includes an inner groove 201, which is located at the center of the upper end face of the movable iron core 101. The inner wall of the inner groove 201 is threaded with a buffer pad 202 for buffering the iron core. The buffer pad 202 is made of rubber, and a through hole is provided at the center of the upper surface of the buffer pad 202.

[0049] The pressure relief channel includes an axial hole 301, which is located at the center of the movable iron core 101 in the axial direction. The lower end of the movable iron core 101 has a plurality of radial holes 302 arranged in a circular array on its surface, and each radial hole 302 communicates with the chamber at the lower end of the axial hole 301.

[0050] The automatic pressure relief unit includes a pressure relief main pipe 303. The lower surface of the pressure relief main pipe 303 is threadedly connected to the inner wall of the upper end of the axial hole 301. An inner retaining ring 304 connected to the inner wall of the upper end of the axial hole 301 is provided directly below the pressure relief main pipe 303. A transfer pipe 305 is connected to the upper end of the pressure relief main pipe 303. A return spring 306 is fixedly connected to the bottom surface of the inner cavity of the transfer pipe 305. A pressure relief plate 307 that slides against the inner wall of the transfer pipe 305 is connected to the upper end of the return spring 306. A pressure relief secondary pipe 310 for pressure relief is connected to the left side surface of the upper end of the transfer pipe 305.

[0051] The system incorporates a pressure relief channel and an automatic pressure relief unit. When the solenoid valve is de-energized, the positioning spring 104 pushes the stop piston 102 and the sealing ring 103 downwards simultaneously. When the sealing ring 103 fully contacts the drain outlet inside the valve body 7, the solenoid valve is closed. At this point, the water entering from the inlet on the right side of the valve body 7 is concentrated in the cavity formed between the valve cover 5 and the valve body 7. When the water pressure in the cavity is high, the high pressure will transport the water to the radial hole 302. The radial hole 302 can then transmit the high-pressure water through the axial hole 301 to the transfer pipe 305. The water inside the transfer pipe 305 will push the pressure relief plate 307 upwards. When the pressure relief plate 307 moves upwards to the pressure relief pair... When the channel position of pipe 310 is reached, the high-pressure water source will be discharged to the designated area through the pressure relief auxiliary pipe 310, thus effectively realizing the automatic pressure relief of the solenoid valve core. After the pressure relief is completed, when the solenoid valve is opened, the coil assembly 6 will control the movable core 101 to move upward along the inner wall of the metal sleeve 4. The upward movement of the movable core 101 can drive the water stop piston 102 and the sealing ring 103 to move upward simultaneously. When the sealing ring 103 is fully disengaged from the drain port on the valve body 7, the channel of the solenoid valve is quickly opened. At this time, the water flow can enter the interior of the drain port from the space above the valve body 7, and transport the water source to the drain pipe through the outlet on the left side of the valve body 7. The above realizes the automatic pressure relief and opening and closing operation of the solenoid valve.

[0052] The detection unit includes a detection spring 308 and a miniature weighing sensor 309. The lower end of the detection spring 308 is fixedly connected to the upper surface of the pressure relief plate 307, and the lower surface of the miniature weighing sensor 309 is threadedly connected to the inner wall of the upper end of the transfer pipe 305.

[0053] The detection unit allows the pressure relief plate 307 to move upward, which in turn drives the detection spring 308 to move upward. When the detection spring 308 contacts the miniature weighing sensor 309, the upward thrust of the pressure relief plate 307 can be detected. This allows users to record and analyze the detection results in a timely manner, thus greatly improving the user experience of the solenoid valve core.

[0054] A metal sleeve 4 for limiting the position is movably sleeved on the upper surface of the movable iron core 101.

[0055] The lower end of the metal sleeve 4 is threaded with a valve cover 5 for sealing off the water flow above.

[0056] A positioning stop 109 is connected to the bottom of the inner wall on the left side of the valve cover 5.

[0057] The alignment block 109, by its design, firstly prevents the outer limiting ring 107 from falling downwards, effectively avoiding damage to the movable iron core 101. Secondly, the alignment block 109 has rounded corners on multiple surfaces, ensuring that the positioning spring 104, which extends and retracts, is not obstructed by the alignment block 109. This also prevents the heat from affecting the normal use of the movable iron core 101, effectively demonstrating the practicality of the alignment block 109 structure.

[0058] The upper end of the metal sleeve 4 is fixedly mounted with a coil assembly 6 for providing mechanical force by bolts.

[0059] A valve body 7 is located directly below the valve cover 5, which is in contact with the iron core component 1. The right end of the valve body 7 is the water inlet, and the left end is the drain outlet.

[0060] Working principle: When the solenoid valve is de-energized, the positioning spring 104 pushes the stop piston 102 and the sealing ring 103 downwards simultaneously. When the sealing ring 103 fully contacts the drain port inside the valve body 7, the solenoid valve is closed. At this time, the water entering from the inlet on the right side of the valve body 7 will concentrate in the cavity formed between the valve cover 5 and the valve body 7. When the water pressure in the cavity is high, the high water pressure will transport the water to the radial hole 302. Then, the radial hole 302 can transmit the high-pressure water through the axial hole 301 to the transfer pipe 305. The water inside the transfer pipe 305 will push the pressure relief plate 307 upwards. When the pressure relief plate 307 moves upwards to the channel position of the pressure relief branch pipe 310... When the pressure is released, the high-pressure water source will be discharged to the designated area through the pressure relief auxiliary pipe 310, thus effectively realizing the automatic pressure relief of the solenoid valve core. After the pressure relief is completed, when the solenoid valve is opened, the coil assembly 6 will control the movable core 101 to move upward along the inner wall of the metal sleeve 4. The upward movement of the movable core 101 can drive the water stop piston 102 and the sealing ring 103 to move upward at the same time. When the sealing ring 103 is fully separated from the drain port on the valve body 7, the channel of the solenoid valve is quickly opened. At this time, the water flow can enter the interior of the drain port from the space above the valve body 7, and transport the water source to the drain pipe through the outlet on the left side of the valve body 7. The above realizes the automatic pressure relief and opening and closing operation of the solenoid valve.

[0061] Disassembly of some structures in the automatic pressure relief assembly 3: First, control the transfer pipe 305 to reverse so that the pressure relief main pipe 303 can be reversed. When the lower end of the pressure relief main pipe 303 is fully disengaged from the inner cavity of the axial hole 301, the automatic pressure relief unit and the detection unit can be quickly disassembled. Then, rotate the movable iron core 101 so that the positioning spring 104 and the outer limit ring 107 can be rotated at the same time. When the position of the alignment groove 108 on the outer limit ring 107 after rotation is aligned with the alignment stop 109, the movable iron core 101 can be pulled down to disassemble the iron core component 1, so that maintenance personnel can inspect the iron core component 1 in a timely manner.

[0062] Installation and removal of positioning spring 104: Turning screw 106 in the forward direction can easily connect auxiliary block 105 and water stop piston 102, thus quickly completing the installation of positioning spring 104. Then, turning screw 106 in the reverse direction can quickly disassemble positioning spring 104, thus improving the maintenance speed of iron core by maintenance personnel.

[0063] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A solenoid valve core with automatic pressure relief capability, characterized in that, include: The iron core component (1) is provided with a buffer assembly (2) for protecting the iron core at its upper end, and a pressure relief assembly (3) for automatic pressure relief is provided inside the iron core component (1). The core component (1) includes a movable core (101). The bottom of the movable core (101) is connected to a water-stop piston (102) for sealing the water outlet. The lower end of the water-stop piston (102) is embedded with a sealing ring (103) for sealing the water outlet. The lower end of the movable core (101) is sleeved with a positioning spring (104) for pushing the water-stop piston (102). The lower end of the positioning spring (104) is fixedly connected to an auxiliary block (105). The contact parts of the auxiliary block (105) and the water-stop piston (102) are all threadedly connected by screws (106). The upper end of the positioning spring (104) is connected to an outer limiting ring (107) that slides on the surface of the movable core (101). The left arc surface of the outer limiting ring (107) is provided with an alignment groove (108). The pressure relief assembly (3) includes a pressure relief channel, an automatic pressure relief unit, and a detection unit. The pressure relief channel is connected to the chamber of the automatic pressure relief unit, and the detection unit is installed on the top of the automatic pressure relief unit. The upper surface of the movable iron core (101) is movably sleeved with a metal sleeve (4) for limiting position. The lower end of the metal sleeve (4) is threaded with a valve cover (5) for sealing off the water flow above. The bottom of the inner left side of the valve cover (5) is connected to an alignment stop (109).

2. The solenoid valve core with automatic pressure relief capability according to claim 1, characterized in that, The buffer assembly (2) includes an inner groove (201), which is located at the center of the upper end face of the movable iron core (101). The inner wall of the inner groove (201) is threaded with a buffer pad (202) for buffering the iron core. The buffer pad (202) is made of rubber, and a through hole is provided at the center of the upper surface of the buffer pad (202).

3. The solenoid valve core with automatic pressure relief capability according to claim 1, characterized in that, The pressure relief channel includes an axial hole (301), which is located at the center of the movable iron core (101) in the axial direction. The lower end of the movable iron core (101) has a plurality of radial holes (302) arranged in a circumferential array, and each radial hole (302) is connected to the chamber at the lower end of the axial hole (301).

4. The solenoid valve core with automatic pressure relief capability according to claim 3, characterized in that, The automatic pressure relief unit includes a pressure relief main pipe (303), the lower surface of which is threadedly connected to the inner wall of the upper end of the axial hole (301), an inner retaining ring (304) connected to the inner wall of the upper end of the axial hole (301) is provided directly below the pressure relief main pipe (303), the upper end of which is connected to a transfer pipe (305), a return spring (306) is fixedly connected to the bottom surface of the inner cavity of the transfer pipe (305), the upper end of which is connected to a pressure relief plate (307) that slides against the inner wall of the transfer pipe (305), and the left side surface of the upper end of the transfer pipe (305) is connected to a pressure relief secondary pipe (310) for pressure relief.

5. The solenoid valve core with automatic pressure relief capability according to claim 4, characterized in that, The detection unit includes a detection spring (308) and a miniature weighing sensor (309). The lower end of the detection spring (308) is fixedly connected to the upper surface of the pressure relief plate (307), and the lower surface of the miniature weighing sensor (309) is threadedly connected to the inner wall of the upper end of the transfer pipe (305).

6. The solenoid valve core with automatic pressure relief capability according to claim 1, characterized in that, The upper end of the metal sleeve (4) is fixedly mounted with a coil assembly (6) for providing mechanical force by bolts.

7. The solenoid valve core with automatic pressure relief capability according to claim 1, characterized in that, A valve body (7) that contacts the iron core component (1) is provided directly below the valve cover (5). The right end of the valve body (7) is the water inlet, and the left end is the drain outlet.

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