Energy-saving electromagnetic valve

Abstract

Disclosed is an energy-saving electromagnetic valve. The energy-saving electromagnetic valve comprises an upper body (1), a left solenoid (2a), a right solenoid (2b), a left movable core (3a), a right movable core (3b), a valve control rod (4), a key (5), a pin (6), a connecting sleeve (7), a main valve element (8), a main valve seat (9), an auxiliary valve element (10), an auxiliary valve seat (11), an inlet (12), an outlet (13), a lower body (14) and a hole (15) in the main valve element (8). The energy-saving electromagnetic valve combines a normally closed electromagnetic valve and a normally open electromagnetic valve into one, and can be safely used in any case only by short-time signal communication.

Description

Technical Field

[0001] This utility model relates to an energy-saving solenoid valve that combines a normally closed valve and a normally open valve into one unit. This energy-saving solenoid valve can operate safely under any circumstances by only needing to communicate signals for a short period of time. Background Technology

[0002] Solenoid valves are electric actuators that use solenoids to close or open valves to control the flow of media such as air, steam, water, and hydraulic systems.

[0003] Based on the state of the solenoid when it does not receive a signal, i.e., when it is not working, solenoid valves can be divided into normally closed solenoid valves and normally open solenoid valves.

[0004] The reason why a normally closed solenoid valve is normally closed is that there is no current flowing in the solenoid when there is no signal communication; the valve will only open when a signal is received, as the solenoid is energized and lifted; when the signal communication is cut off, the valve will close again.

[0005] The working principle of a normally open solenoid valve is the opposite of that of a normally closed solenoid valve.

[0006] Normally closed solenoid valves are suitable for systems where the valve is normally closed (for a relatively long time) and only opened when necessary (for a relatively short time). This is because when a signal is received, the solenoid generates heat and consumes a significant amount of power as current flows through it.

[0007] Normally open solenoid valves are suitable for the opposite situation.

[0008] However, in practical applications, valves are often kept open and closed for the same amount of time. In such cases, using normally closed or normally open valves is not conducive to the safety and energy saving of the equipment, because the solenoid coil may burn out due to overheating.

[0009] This utility model discloses an energy-saving solenoid valve that combines a normally closed valve and a normally open valve into one unit, and controls the opening or closing of the valve by signal communication for only a short time, thereby overcoming the defects of the prior art. Utility Model Content

[0010] This utility model relates to an energy-saving solenoid valve that combines a normally closed valve and a normally open valve into one unit. It requires only a short signal communication time for safe use under any circumstances. The solenoid valve includes an upper body, a left solenoid, a right solenoid, a left movable core, a right movable core, a valve control rod, a key, a pin, a connecting sleeve, a main valve element, a main valve seat, an auxiliary valve element, an auxiliary valve seat, an inlet, an outlet, a lower body, and an inner hole in the main valve element.

[0011] The lower body and the upper body are connected by bolts and nuts, and a sealing ring is provided between the lower body and the upper body and the bolts and nuts.

[0012] Two movable cores and two solenoids are fixed on both sides of the vertical axis of the upper body, and the two movable cores are connected by pins.

[0013] The left movable core has a track groove into which the key can be inserted.

[0014] The valve control rod is installed in the internal space of the upper body, and the valve control rod is integrated with the auxiliary valve element located below the valve control rod. A sealing ring is provided on the bottom center of the auxiliary valve element to block the inner hole of the main valve element.

[0015] The key is mounted on the valve control rod and inserted into the guide groove of the left movable core, so that it moves up and down according to the left and right movement of the left movable core.

[0016] The main valve element and the auxiliary valve element are connected to each other with a certain movement clearance via a connecting sleeve, so that as the valve control lever moves upward, the auxiliary valve element can be opened first, and then the main valve element can be opened.

[0017] There is a certain gap between the main valve element and the upper body, and this gap always leads to the inlet of the solenoid valve.

[0018] With the solenoid valve closed, the main valve element and the auxiliary valve element press down on the main valve seat and the auxiliary valve seat respectively, separating the inlet and outlet and preventing fluid flow. At this time, the fluid pressure at the inlet is transmitted through the gap between the inlet, the circumferential surface of the main valve element and the upper body, and the gap on the main valve element, to press the main valve element down. Therefore, the greater the pressure, the greater the force required to close the valve.

[0019] To open the solenoid valve, the left solenoid is energized, and under the action of electromagnetic force, the left movable core moves to the left. As the left movable core moves to the left, the key mounted on the valve control rod moves along the guide groove of the left movable core, thereby moving the valve control rod upward. Due to the increased pressure difference between the inlet and outlet, the force required to press down on the main valve element increases, thus requiring a greater force to directly lift the main valve element, and consequently, a larger solenoid tube. To address this issue, the valve opening process is divided into two main steps.

[0020] The first step is to eliminate the pressure difference by separating the auxiliary valve element from the auxiliary valve seat. In this step, the auxiliary valve element, located below the valve control lever, is first lifted. Because the auxiliary valve element has a relatively small diameter, only a small force is needed to lift it. After lifting the auxiliary valve element, a fluid flow path is formed through the following: inlet → gap between the circumferential surface of the main valve element and the upper body → gap on the main valve element → gap between the auxiliary valve seat and the auxiliary valve element → inner bore of the main valve element → outlet, thereby eliminating the pressure difference.

[0021] As the valve control lever is further lifted, the second step of valve opening begins. The auxiliary valve element and the main valve element are connected to each other via a connecting sleeve. Only after the auxiliary valve element disengages from the auxiliary valve seat and moves a certain distance towards the end of the connecting sleeve can the auxiliary valve element lift the main valve element. Since the pressure difference has been essentially eliminated in the first step, even a small force can lift the main valve element. Therefore, the main valve element separates from the main valve seat, forming a flow path for fluid through: inlet → gap between the main valve element and the main valve seat → outlet, allowing fluid to flow. At this time, the key mounted on the valve control lever moves upward along the guide groove of the left movable core and is locked on the right side of the groove, so that the solenoid valve remains open even if the left solenoid is de-energized. This process takes approximately one second.

[0022] The valve closing process is as follows:

[0023] When the right solenoid is energized, the right movable core and left movable core connected to the right move to the right, and the valve control rod moves downward along the guide groove of the left movable core as the key mounted on it moves. As the valve control rod moves downward, the main valve element, which has been lifted by the connecting sleeve, is released. The main valve element and the auxiliary valve element, under their own weight and the downward pressing force of the valve control rod, press down on the main valve seat and the auxiliary valve seat, respectively. At this time, the key mounted on the valve control rod moves downward along the guide groove of the left movable core and is locked on the left side of the groove, so that the solenoid valve remains closed even if the right solenoid valve is de-energized. In addition, with the formation of the closing flow path through the following: inlet → circumferential surface of the gap between the main valve element and the upper body → gap on the main valve element, the pressure difference between the gap above and below the main valve element generated by the direct transmission of fluid pressure at the inlet can further close the solenoid valve, and the higher the pressure at the inlet, the tighter the solenoid valve is closed. Attached Figure Description

[0024] Figure 1 This is a schematic diagram showing the open state of the energy-saving solenoid valve according to the present invention.

[0025] Figure 2This is a schematic diagram of the closed state of the energy-saving solenoid valve according to the present invention. Detailed Implementation

[0026] The structure and operation of the energy-saving solenoid valve according to the present invention will be described in detail below with reference to the accompanying drawings.

[0027] like Figure 1 and Figure 2 As shown, the solenoid valve of this utility model includes an upper body (1), a left solenoid (2a), a right solenoid (2b), a left movable core (3a), a right movable core (3b), a valve control rod (4), a key (5), a pin (6), a connecting sleeve (7), a main valve element (8), a main valve seat (9), an auxiliary valve element (10), an auxiliary valve seat (11), an inlet (12), an outlet (13), a lower body (14), and an inner hole (15) of the main valve element (8).

[0028] The lower body (14) is connected to the upper body (1) by bolts and nuts, and a sealing ring is provided between the lower body and the upper body and the bolts and nuts.

[0029] Two movable cores (3a, 3b) and two solenoids (2a, 2b) are fixed on both sides of the vertical axis of the upper body (1), and the two movable cores (3a, 3b) are connected by pins (6).

[0030] The left movable core (3a) has a guide groove in which a key (5) can be inserted.

[0031] The valve control rod (4) is installed in the internal space of the upper body (1), and the valve control rod (4) is integrated with the auxiliary valve element (10) located below the valve control rod (4). A sealing ring is provided on the center of the bottom of the auxiliary valve element (10) to block the inner hole (15) of the main valve element (8).

[0032] The key (5) is mounted on the valve control rod (4) and inserted into the guide groove of the left movable core (3a), so that it moves up and down according to the left and right movement of the left movable core (3a).

[0033] The main valve element (8) and the auxiliary valve element (10) are connected to each other with a certain movement clearance via a connecting sleeve (7), such that as the valve control lever (4) moves upward, the auxiliary valve element (10) can be opened first, and then the main valve element (8) can be opened.

[0034] There is a certain gap between the main valve element (8) and the upper body (1), and this gap always leads to the inlet (12) of the solenoid valve.

[0035] When the solenoid valve is closed, the main valve element (8) and the auxiliary valve element (10) press down on the main valve seat (9) and the auxiliary valve seat (11) respectively, causing the inlet (12) and outlet (13) to separate, and fluid cannot flow. At this time, the fluid pressure at the inlet (12) is transmitted through the gap between the inlet (12), the circumferential surface of the main valve element (8) and the upper body (1), and the gap on the main valve element (8), to press the main valve element (8) down. Therefore, the greater the pressure, the greater the force required to close the valve.

[0036] The working principle of the energy-saving solenoid valve of this utility model is as follows:

[0037] To open the solenoid valve, the left solenoid (2a) is energized, and then the left movable core (3a) moves to the left under the action of electromagnetic force. As the left movable core (3a) moves to the left, the key (5) mounted on the valve control rod (4) moves along the guide groove of the left movable core (3a), thereby causing the valve control rod (4) to move upward. Due to the increased pressure difference between the inlet (12) and the outlet (13), the force required to press down on the main valve element (8) increases, thus requiring a greater force to directly lift the main valve element (8), and correspondingly, a larger solenoid is also needed. To solve this problem, the valve opening process is divided into two main steps.

[0038] The first step is to eliminate the pressure difference by separating the auxiliary valve element (10) from the auxiliary valve seat (11). In this step, the auxiliary valve element (10), located below the valve control lever (4), is first lifted. Figure 1 and Figure 2 As shown, since the diameter of the auxiliary valve element (10) is relatively small, only a small force is needed to lift the auxiliary valve element (10). After the auxiliary valve element (10) is lifted, a flow path is formed through the following: inlet (12) → gap between the circumferential surface of the main valve element (8) and the upper body (1) → gap on the main valve element (8) → gap between the auxiliary valve seat (11) and the auxiliary valve element (10) → inner hole (15) of the main valve element (8) → outlet (13), thereby eliminating the pressure difference.

[0039] As the valve control lever (4) is further lifted, the second step of valve opening begins. The auxiliary valve element (10) and the main valve element (8) are connected to each other via a connecting sleeve (7). The auxiliary valve element (10) can only lift the main valve element (8) after it has disengaged from the auxiliary valve seat (11) and moved a certain distance toward the end of the connecting sleeve (7). Since the pressure difference has been essentially eliminated in the first step, even a small force can lift the main valve element (8). Thus, the main valve element (8) separates from the main valve seat (9), and a flow path for fluid is formed through the following: inlet (12) → gap between the main valve element (8) and the main valve seat (9) → outlet (13), allowing fluid to flow. At this time, the key (5) mounted on the valve control lever (4) moves upward along the guide groove of the left movable core (3a) and is locked on the right side of the groove, so that the solenoid valve remains open even if the left solenoid (2a) is de-energized. This process takes about one second.

[0040] The valve closing process is as follows:

[0041] like Figure 2 As shown, when the right solenoid (2b) is energized, the right movable core (3b) and the left movable core (3a) connected to the right solenoid (2b) move to the right, and the valve control rod (4) moves downward along the guide groove of the left movable core (3a) as the key (5) mounted on it moves. As the valve control rod (4) moves downward, the main valve element (8) lifted by the connecting sleeve (7) is released, and the main valve element (8) and the auxiliary valve element (10) press down on the main valve seat (9) and the auxiliary valve seat (11) respectively under their own weight and the downward pressing force of the valve control rod (4). At this time, the key (5) mounted on the valve control rod (4) moves downward along the guide groove of the left movable core (3a) and is locked on the left side of the groove, so that the solenoid valve can remain closed even if the right solenoid valve (2b) is de-energized. Furthermore, with the formation of the closed flow path through the following: inlet (12) → gap between the circumferential surface of the main valve element (8) and the upper body (1) → gap on the main valve element (8), the pressure difference between the gap above and below the main valve element (8) generated by the direct transmission of fluid pressure at the inlet (12) can cause the solenoid valve to be further closed, and the higher the pressure at the inlet (12), the tighter the solenoid valve is closed.

[0042] The advantages of the energy-saving solenoid valve according to this utility model are as follows:

[0043] - By alternating between opening and holding the valve open or closing and holding the valve closed through signal communication in a short time (about one second) when needed, a significant amount of energy can be saved, thus overcoming the shortcomings of traditional normally open and normally closed solenoid valves that require continuous power to maintain the valve in an open or closed state.

[0044] - The solenoids used to open and close the valve are installed horizontally relative to each other, and guide grooves and keys are used to convert the horizontal movement of the movable core into the vertical movement of the valve element, thereby solving the problem of valves not closing or opening smoothly due to various technical defects when operating the valve.

Claims

1. An energy-saving solenoid valve, comprising an upper body (1), a left solenoid (2a), a right solenoid (2b), a left movable core (3a), a right movable core (3b), a valve control rod (4), a key (5), a pin (6), a connecting sleeve (7), a main valve element (8), a main valve seat (9), an auxiliary valve element (10), an auxiliary valve seat (11), an inlet (12), an outlet (13), a lower body (14), and an inner hole (15) of the main valve element (8), characterized in that, The left movable core (3a) and the right movable core (3b) are fixed on both sides of the vertical axis of the upper body (1), the left solenoid (2a) and the right solenoid (2b) are fixed on both sides of the vertical axis of the upper body (1), and the left movable core (3a) and the right movable core (3b) are connected via the pin (6). The key (5) is mounted on the valve control rod (4) and inserted into the guide groove of the left movable core (3a) so as to move up and down along the guide groove according to the left and right movement of the left movable core (3a) and be locked on the right or left side of the guide groove.

2. The energy-saving solenoid valve according to claim 1, characterized in that, The valve control rod (4) is installed in the internal space of the upper body (1), and the valve control rod (4) is integrated with the auxiliary valve element (10) located below the valve control rod (4), and a sealing ring is provided on the central part of the bottom of the auxiliary valve element (10) to block the inner hole (15) of the main valve element (8).

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