A pulse solenoid valve

Abstract

The present invention relates to a pulse type solenoid valve, comprising a valve body, an electromagnetic mechanism and an angle control mechanism. The valve body is provided with an inlet and an outlet, and the inlet and the outlet are connected through an internal flow channel arranged in the valve body. A valve core is arranged in the internal flow channel, and the valve core is connected to the angle control mechanism through a valve stem. The electromagnetic mechanism is connected to the angle control mechanism. The electromagnetic mechanism is used to drive the angle control mechanism to operate when receiving a pulse electric signal. The angle control mechanism is used to drive the valve stem to rotate to a set angle under the drive of the electromagnetic mechanism, and lock the valve stem when the electromagnetic mechanism is powered off to limit the rotation of the valve stem. The valve core is used to rotate under the drive of the valve stem to adjust the opening of the valve body. The solenoid valve has a simple and compact structure and is easy to manufacture. It can change and maintain the state of the valve stem only after instantly emitting a pulse electric signal. It does not need to be continuously powered on, which saves electric energy and is conducive to heat dissipation, thereby effectively avoiding problems such as heating caused by continuous power on.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to a pulse type solenoid valve. Background Art

[0002] Solenoid valves are basic automation components that use electromagnetics to control fluids. They are a common actuator and are mainly used to adjust the direction, flow, speed and other parameters of the medium in industrial control systems. 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 valves can be divided into many types according to their structure and specific functions. The most commonly used ones are check valves, safety valves, directional control valves, speed control valves, etc. Different solenoid valves play a role in different positions of the control system.

[0003] In the current conventional technical solutions, the on-off of the circuit is usually used to control the presence or absence of magnetic force, thereby achieving control over the valve stem. However, in the open or closed state, continuous power supply is required to maintain the magnetic force to ensure that the valve stem is always in the open or closed position. Continuous power supply not only consumes a lot of energy, which is not in line with the current development concept of energy conservation and environmental protection, but also causes serious heating, which is prone to coil short circuit and open circuit, and accelerates the aging of components, seriously affecting the service life. Summary of the invention

[0004] The purpose of the present invention is to improve the deficiencies in the prior art and to provide a pulse solenoid valve with a simple and compact structure and easy manufacturing. The valve stem can be changed and maintained in its state only after a pulse electrical signal is emitted instantaneously. There is no need for continuous power supply, which saves electric energy and is beneficial to heat dissipation, thereby effectively avoiding problems such as heat caused by continuous power supply.

[0005] The first aspect of the present invention is to solve the problem that existing valves need to be continuously energized during operation, and provides a pulse solenoid valve, including a valve body, an electromagnetic mechanism and an angle control mechanism, wherein the valve body is provided with an inlet and an outlet, and the inlet and the outlet are connected via an internal flow channel provided in the valve body, a valve core is provided in the internal flow channel, and the valve core is connected to the angle control mechanism via a valve stem, and the electromagnetic mechanism is connected to the angle control mechanism, wherein the electromagnetic mechanism is used to drive the angle control mechanism to operate when a pulse electrical signal is received, and the angle control mechanism is used to drive the valve stem to rotate to a set angle under the drive of the electromagnetic mechanism, and lock the valve stem when the electromagnetic mechanism is powered off to limit the rotation of the valve stem, and the valve core is used to rotate under the drive of the valve stem to adjust the opening of the valve body. In the present solution, when the electromagnetic mechanism receives a pulse electrical signal, it will generate magnetic force, and use the magnetic force to drive the angle control mechanism to operate once. During one operation, the angle control mechanism drives the valve stem to rotate to a set angle, thereby driving the valve core to rotate to a set angle. After the angle control mechanism completes one operation, it can lock the valve stem so that the valve stem and the valve core can be stably maintained at the desired position to keep the valve opening unchanged. In actual use, by sending multiple pulse signals to the pulse solenoid valve, the valve stem can be driven to rotate to a desired valve opening, which can not only realize the regulation of the water flow rate, but also in the actual process of the pulse solenoid valve, there is no need for continuous power supply, which saves electricity and is beneficial to heat dissipation, thereby effectively avoiding problems such as heat caused by continuous power supply.

[0006] Preferably, the valve core is a disc-shaped structure. The valve core is connected to a valve stem, and the valve stem drives the valve core to rotate, thereby changing the opening of the internal flow channel to form a pulse electromagnetic butterfly valve.

[0007] To facilitate sealing and packaging, the device further includes a shell, which is fixed to the valve body, and the electromagnetic mechanism and the angle control mechanism are respectively fixed in the shell.

[0008] Preferably, the electromagnetic mechanism includes an electromagnet and an armature matched with the electromagnet, the armature is connected to the angle control mechanism, the electromagnet includes an iron core and a coil wound around the iron core, and the two ends of the coil are electrically connected to two control terminals provided on the housing. When a pulse electrical signal passes through the coil, the electromagnet generates magnetic force, and the armature is provided at one end of the iron core so as to move under the action of the magnetic force to drive the angle control mechanism.

[0009] Preferably, the angle control mechanism includes a sliding part, a limiting sleeve, and a pushing part, wherein the sliding part includes a sliding rod, a plurality of sliding claws arranged at one end of the sliding rod and along the circumferential direction of the sliding rod, one end of the sliding claw is an inclined first guide surface, the sliding rod is used to connect the valve stem, the limiting sleeve is fixed to the shell, the limiting sleeve is a cylindrical structure, one end of the limiting sleeve is constructed with a plurality of restraining parts for restraining the sliding claw, each restraining part is respectively distributed along the circumferential direction of the limiting sleeve, and the pushing part includes a push rod of a cylindrical structure, one end of the push rod is inclinedly provided with a plurality of second guide surfaces, the second guide surfaces are adapted to the first guide surfaces, each of the second guide surfaces is respectively distributed along the circumferential direction of the push rod, the armature is fixed to the pushing part, and when the sliding claw is stuck in the restraining part, the first guide surface only contacts with part of the second guide surface. Within a pulse electrical signal, the electromagnetic mechanism and the angle control mechanism act once respectively, and after a pulse electrical signal, the sliding claw in the slide rod can rotate from one constraint part to an adjacent constraint part, so that the rotation angle of the slide rod is equal to the angle between the two adjacent constraint parts. By reasonably setting the size of the central angle, the rotation angle of the valve core of the solenoid valve under the action of a single pulse signal can be accurately set, thereby achieving the purpose of accurately controlling the opening; and by sending multiple pulse signals to the pulse solenoid valve, the electromagnetic mechanism and the angle control mechanism in the pulse solenoid valve can be acted multiple times, so that the actual opening of the valve core reaches the required opening; in addition, since the sliding claw will be stuck in the corresponding constraint part before and after the angle control mechanism is acted, the purpose of constraining the slide rod, valve stem and valve core is achieved, so that during the actual use of the pulse solenoid valve, there is no need to continuously power on, which saves electricity and is conducive to heat dissipation, thereby effectively avoiding problems such as heat caused by continuous power on.

[0010] In order to accurately control the angle set by the angle control mechanism to drive the valve stem to rotate during a single action, preferably, the constraint portion includes a slot provided at the end of the limit sleeve and a constraint surface provided between two adjacent slots, the constraint surface being inclined, and the inclination direction of the constraint surface being opposite to the inclination direction of the second guide surface, so that the constraint surface and the second guide surface can form a V-shaped angle, so that after the push rod pushes the sliding claw out of the slot, the sliding claw can be stuck in the V-shaped angle and can rotate along the constraint surface as the push rod pushes, which can achieve the purpose of controlling the uniform rotation of the sliding rod and effectively prevent the sliding claw from separating from the second guide surface.

[0011] In order to realize the automatic reset function when power is off, further, a reset spring is included, the reset spring sleeve is arranged on the slide bar or on one end of the slide bar, one end of the reset spring is fixed to the housing, and the other end is in contact with the slide bar, and the reset spring is used to make the sliding claw clamped into the constraint part; or, it also includes a reset spring 1 and a reset spring 2, the reset spring 2 sleeve is arranged on the slide bar or on one end of the slide bar, one end of the reset spring 2 is fixed to the housing, and the other end is in contact with the slide bar, and is used to drive the sliding claw to clamp into the constraint part, and the reset spring sleeve is arranged on the pushing part, and is used to provide the push rod with elastic force in the direction away from the limit sleeve. Using reset spring 1 and reset spring 2 to drive the push rod and the slide bar to reset respectively is conducive to achieving efficient and rapid reset, so that the electromagnetic mechanism and the angle control mechanism can act continuously.

[0012] To prevent the push rod from rotating relative to the limit sleeve, further, the outer side of the push rod is provided with a plurality of guide grooves or guide keys, the inner wall of the limit sleeve is provided with guide keys adapted to the guide grooves or guide grooves adapted to the guide keys, and the push rod is constrained by the cooperation of the guide grooves and the guide keys to prevent the push rod from rotating; or, the push part further includes an extension rod and a guide part 1 provided on the housing, the extension rod is a non-circular cross-section rod, the guide part 1 is adapted to the extension rod, the extension rod is connected to the push rod or is an integral structure, and forms a moving pair with the guide part 1, the armature is fixed to the extension rod, and the guide part 1 is a guide cylinder or guide groove. In order to constrain the push part to move only along its own axial direction.

[0013] In order to make the slide bar move strictly in the length direction thereof, the housing is further provided with a second guide part, the second guide part is a guide cylinder or a guide groove, and the cross section of the slide bar is circular, the second guide part is adapted to the slide bar, and the slide bar and the second guide part form a moving pair, so that the slide bar can not only move linearly relative to the housing, but also rotate relative to the slide bar.

[0014] The second aspect of the present invention is to solve the transmission problem between the slide rod and the valve stem, so that the slide rod can both rotate and move axially, and can drive the valve stem to rotate. Scheme 1 also includes a sleeve, and the sliding part also includes a limit rod arranged at one end of the slide rod. The sleeve is provided with a through hole passing through the limit rod. The limit rod is arranged in the through hole and forms a moving pair with the slide sleeve, and the cross section of the limit rod is a non-circular surface. The through hole is adapted to the limit rod, and the slide sleeve is connected to the valve stem. Since the slide rod forms a moving pair with the sleeve through the limit rod, the slide part can move relative to the sleeve during the operation of the angle control mechanism, and since the cross section of the limit rod is a non-circular surface, the slide part can drive the sleeve to rotate together, thereby achieving the purpose of driving the valve stem to rotate.

[0015] Solution 2 also includes a sleeve, the sleeve is provided with a through hole passing through the slide rod, and the through hole is provided with a plurality of guide grooves or guide keys arranged along the central axis direction of the sleeve, the outer side surface of one end of the slide rod is provided with a plurality of guide keys adapted to the guide grooves, or a guide groove adapted to the guide keys, and the sleeve is connected to the valve stem. Through the cooperation of the guide grooves and the guide keys, not only can the sleeve and the sliding part form a moving pair, so that the slide rod can move relative to the sleeve, but also the slide rod can drive the sleeve to rotate together, thereby achieving the purpose of driving the valve stem to rotate.

[0016] Since the pulse solenoid valve has two processes, opening and closing, in actual use, in order to facilitate the control of opening / closing and opening degree and improve the response speed, it is preferred to include two sets of electromagnetic mechanisms and angle control mechanisms, the two electromagnetic mechanisms are electromagnetic mechanism 1 and electromagnetic mechanism 2, and the two sets of angle control mechanisms are angle control mechanism 1 and angle control mechanism 2, wherein the electromagnetic mechanism 1 is connected to the angle control mechanism 1, and the angle control mechanism 1 is connected to the valve stem 1 fixed to the valve core, and is used to drive the valve stem 1 to rotate forward; the electromagnetic mechanism 2 is connected to the angle control mechanism 2, and the angle control mechanism 2 is connected to the valve stem 2 fixed to the valve core, and the valve stem 1 and the valve stem 2 are in line. By setting two sets of electromagnetic mechanisms to control the opening and closing of the solenoid valve separately, it is easier to achieve precise control and is conducive to improving the response speed.

[0017] Since the electromagnetic mechanism 1 and the electromagnetic mechanism 2 are used to drive the valve core to rotate forward and reverse respectively, in order to prevent the two sets of angle control mechanisms in the pulse electromagnetic valve from interfering with each other during the operation, further, the sliding part also includes a one-way clutch, the sliding rod includes a first section and a second section, the sliding claw is arranged on the first section, the second section cooperates with the sliding sleeve, the first section is connected to the second section through the one-way clutch, the first section is used to drive the second section to rotate in one direction through the one-way clutch, and when the second section rotates in the opposite direction to the one-way clutch, the one-way clutch slips. Thereby, the two sets of angle control mechanisms do not interfere with each other during the operation, and the opening / closing of the valve can be effectively realized.

[0018] Preferably, the one-way clutch is preferably a gear clutch, such as a helical gear clutch.

[0019] Theoretically, the more the number of constraint parts arranged along the circumferential direction of the limit sleeve, the smaller the angle of the valve core rotation under the action of a single pulse electrical signal, and the higher the precision. However, in practice, due to the processing precision and the size parameters of the limit sleeve, the number of the constraint parts cannot be too many. The third aspect of the present invention is to solve the problem of improving the flow regulation accuracy of the solenoid valve. Furthermore, a transmission mechanism is also arranged between the valve stem and the angle control mechanism, one end of the transmission mechanism is connected to the valve stem, and the sliding sleeve is arranged at the other end of the transmission mechanism, and the transmission ratio of the transmission mechanism is greater than 1. That is, the reduction transmission mechanism is preferably used to achieve the purpose of reducing the rotation speed and increasing the torque, which can not only effectively improve the flow regulation accuracy of the pulse solenoid valve, but also through the reasonable arrangement of the transmission mechanism, the two sets of electromagnetic mechanisms and the angle control mechanism can be arranged on the same side of the valve body, which is conducive to the structure of the entire solenoid valve to be more compact for actual installation and use.

[0020] Preferably, the transmission mechanism may be a gear reduction transmission mechanism, a worm gear reduction transmission mechanism or a combination of the two.

[0021] Compared with the prior art, the pulse solenoid valve provided by the present invention has a simple and compact structure and is easy to manufacture. It can change and maintain the state of the valve stem only after instantly emitting a pulse electrical signal. It does not require continuous power supply, which saves electricity and is beneficial to heat dissipation, thereby effectively avoiding problems such as heat caused by continuous power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 This is a schematic structural diagram of a sliding portion in a pulse solenoid valve provided in Example 1 of the present invention.

[0024] Figure 2 for Figure 1 Right view of .

[0025] Figure 3 This is a schematic structural diagram of a limit sleeve in a pulse solenoid valve provided in Example 1 of the present invention.

[0026] Figure 4 This is a schematic diagram of the partial structure of a push rod in a pulse solenoid valve provided in Example 1 of the present invention.

[0027] Figure 5 for Figure 4 Left view of .

[0028] Figure 6 This is one of the states of the angle control mechanism in a pulse solenoid valve provided in Example 1 of the present invention. At this time, the sliding claw is stuck in the slot and moves outward along the slot under the drive of the push rod.

[0029] Figure 7 In a pulse solenoid valve provided in Example 1 of the present invention, the second state of the angle control mechanism is that the push rod pushes the sliding claw out of the slot, the end of the sliding claw is clamped between the first guide surface and the constraint surface, and the sliding rod moves and rotates synchronously under the push of the push rod.

[0030] Figure 8 In a pulse solenoid valve provided in Example 1 of the present invention, in the third state of the angle control mechanism, the second guide surface is completely separated from the constraint portion, and the slide rod continues to rotate to a position corresponding to the next slot through the cooperation between the first guide surface and the second guide surface.

[0031] Fig. 9 In a pulse solenoid valve provided in Example 1 of the present invention, in the fourth state of the angle control mechanism, the electromagnetic mechanism is powered off, the push rod is automatically reset, the slide rod is also automatically reset, and the slide claw is locked in the corresponding slot.

[0032] Fig.10 This is a schematic diagram of the partial structure of a pulse solenoid valve provided in Example 1 of the present invention.

[0033] Fig.11 for Fig.10 AA view of the .

[0034] Fig.12 This is a schematic diagram of the structure of a pulse solenoid valve provided in Example 1 of the present invention.

[0035] Fig.13 This is a schematic diagram of the structure of a pulse solenoid valve provided in Example 2 of the present invention.

[0036] Fig.14 This is a schematic diagram of the partial structure of a pulse solenoid valve provided in Example 5 of the present invention.

[0037] Description of the symbols in the figure: housing 101, iron core 102, coil 103, armature 104, return spring 1 105, control terminal 106, guide part 1 107, electromagnetic mechanism 1 108, electromagnetic mechanism 2 109; sliding part 201, sliding rod 202, sliding claw 203, first guide surface 204, return spring 2 205, limiting sleeve 206, constraint part 207, slot 208, constraint surface 209, pushing part 210, push rod 211, second guide surface 212, guide part 213, extension rod 21 4. Sleeve 215, through hole 216, guide groove 217, guide key 218, angle control mechanism 1 219, angle control mechanism 2 220, first section 221, second section 222; valve body 300, inlet 301, outlet 302, internal flow channel 303, valve core 304, valve stem 305, valve stem 1 306, valve stem 2 307; one-way clutch 400; driving gear 501, driven gear 502, gear 503; state detection contact 601, fixed contact 602, detection terminal 603. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present invention. Example 1

[0039] See also Figure 1-Figure 10 In this embodiment, a pulse solenoid valve is provided, including a valve body 300, an electromagnetic mechanism and an angle control mechanism. The valve body 300 is provided with an inlet 301 and an outlet 302. The inlet 301 and the outlet 302 are connected via an internal flow channel 303 provided in the valve body 300. A valve core 304 is provided in the internal flow channel 303. The valve core 304 is connected to the angle control mechanism via a valve stem 305. The electromagnetic mechanism is connected to the angle control mechanism. The electromagnetic mechanism is used to generate magnetic force when receiving a pulse electrical signal, and drive the angle control mechanism to operate by the magnetic force (operate once for one pulse electrical signal).

[0040] The angle control mechanism is used to drive the valve stem 305 to rotate a set angle under the drive of the electromagnetic mechanism, and lock the valve stem 305 when the electromagnetic mechanism is powered off (after the pulse electrical signal has passed) to limit the rotation of the valve stem 305.

[0041] The valve core 304 is used to rotate under the drive of the valve stem 305 to adjust the opening of the valve body 300, so as to achieve the purpose of adjusting the water flow rate. In this embodiment, when the electromagnetic mechanism receives the pulse electric signal, it will generate magnetic force, and use the magnetic force to drive the angle control mechanism to act once. During one action, the angle control mechanism drives the valve stem 305 to rotate the set angle, thereby driving the valve core 304 to rotate the set angle. After the angle control mechanism completes one action, the valve stem 305 can be locked, so that the valve stem 305 and the valve core 304 can be stably maintained at the desired position to keep the valve opening unchanged. In actual use, by sending multiple pulse signals to the pulse electromagnetic valve, the angle of the valve stem 305 can be driven to reach the desired valve opening, which can not only achieve the adjustment of the water flow rate, but also in the actual process of the pulse electromagnetic valve, there is no need to continuously energize, which saves electric energy and is conducive to heat dissipation, thereby effectively avoiding the problems of heating caused by continuous energization.

[0042] like Fig.10 As shown, as a preference, in this embodiment, the valve core 304 adopts a disc-shaped structure, the valve core 304 is connected to the valve stem 305, the valve stem 305 drives the valve core 304 to rotate, thereby changing the opening of the internal flow channel 303. It can be understood that when the valve core 304 is perpendicular to the length direction of the internal flow channel 303, the solenoid valve is in a fully closed state, and when the valve core 304 is parallel to the length direction of the internal flow channel 303, the solenoid valve reaches the maximum opening. Since the valve core 304 with a disc-shaped structure is adopted in this embodiment, the solenoid valve can constitute a pulse electromagnetic butterfly valve.

[0043] In this embodiment, the lower end of the valve core 304 is movably connected to the valve body 300 via a vertically arranged rotating shaft, and the upper end of the valve core 304 is connected to a vertically arranged valve stem 305, and the valve stem 305 is movably connected to the valve body 300 so that the valve core 304 can be driven to rotate relative to the valve body 300 under the drive of the angle control mechanism. As shown in the figure, in order to improve the force, the rotating shaft and the valve stem 305 are respectively arranged on one side of the valve core 304.

[0044] As an example, in this embodiment, the electromagnetic mechanism includes an electromagnet and an armature 104 matched with the electromagnet, the armature 104 is connected to the angle control mechanism, and the electromagnet can adopt an existing electromagnet. For example, the electromagnet includes an iron core 102 and a coil 103 wound around the iron core 102. When a pulse electrical signal passes through the coil 103, the electromagnet generates a magnetic force. The armature 104 is arranged at one end of the iron core 102 so that it can move under the action of the magnetic force to drive the angle control mechanism.

[0045] In order to facilitate the sealing and packaging of the electromagnetic mechanism, Fig.10 As shown, in this embodiment, it also includes a housing 101, the housing 101 is fixed to the valve body 300, and the electromagnetic mechanism is fixed in the housing 101; in order to facilitate wiring or remote control in actual use, in a further solution, the housing 101 is also provided with two control wiring terminals 106, such as Fig.10 As shown, the two control terminals 106 are electrically connected to the two ends of the coil 103 respectively. In actual use, the two control terminals 106 can be conveniently connected to a pulse electric signal transmitter or controller (such as a single-chip microcomputer, PLC, etc.) to form a closed loop. When in use, the working state of the solenoid valve can be changed by simply sending a pulse electric signal to the solenoid valve, thereby realizing automatic control of the solenoid valve.

[0046] For example, in this embodiment, the angle control mechanism includes a sliding portion 201, a limiting sleeve 206, and a pushing portion 210. Figure 1-Figure 10 As shown, the sliding part 201 includes a sliding rod 202, a plurality of sliding claws 203 arranged at one end of the sliding rod 202 and arranged along the circumferential direction of the sliding rod 202, and one end of the sliding claw 203 is a first guiding surface 204 arranged obliquely. Figure 1 and Figure 2 As shown, the slide rod 202 is used to connect the valve stem 305, the limiting sleeve 206 is fixed to the housing 101, the limiting sleeve 206 is a cylindrical structure, and one end of the limiting sleeve 206 is configured with a plurality of restraining portions 207 for restraining the sliding claw 203, and each restraining portion 207 is respectively distributed along the circumferential direction of the limiting sleeve 206, as shown in FIG. Figure 3 As shown, the pushing portion 210 includes a push rod 211 of a cylindrical structure, and one end of the push rod 211 is obliquely provided with a plurality of second guide surfaces 212, such as Figure 4 and Figure 5 As shown, the second guide surface 212 is matched with the first guide surface 204, and each of the second guide surfaces 212 is distributed along the circumferential direction of the push rod 211 and is connected end to end. The armature 104 is fixed to the pushing portion 210. When the sliding claw 203 is stuck in the restraining portion 207, the first guide surface 204 only contacts part of the second guide surface 212.

[0047] like Figure 6-Figure 10 As shown, the working principle of the angle control mechanism is: initially, the sliding claw 203 at one end of the sliding rod 202 is stuck in the constraint portion 207; when the electromagnet is energized (pulse electrical signal), the push rod 211 drives the sliding rod 202 to move relative to the limit sleeve 206 under the drive of the electromagnet, and before the sliding claw 203 is not separated from the constraint portion 207, the first guide surface 204 is only in contact with a portion of the second guide surface 212, as shown in FIG. Figure 6As shown, the sliding claw 203 is constrained to prevent the sliding claw 203 from rotating; when the push rod 211 continues to move, pushing the sliding claw 203 out of the constraining portion 207, that is, beyond the critical position of the end of the constraining portion 207, as shown Figure 7 As shown, the purpose of unlocking is achieved. Since the first guide surface 204 and the second guide surface 212 are both inclined, there must be a component force along the circumferential direction between the two. Under the action of this component force, the slide bar 202 moves relative to the limit sleeve 206 and rotates relative to the limit sleeve 206, thereby driving the valve stem 305 and the valve core 304 to rotate; as the push rod 211 continues to move; Figure 8 As shown in FIG. 2 , when the second guide surface 212 is completely exposed from the limiting sleeve 206, the slide bar 202 can continue to rotate under the action of the component force and rotate to the position corresponding to the adjacent constraint portion 207 to complete the rotation; thereafter, the electromagnet is powered off (the duration of the pulse electrical signal ends), the magnetic force disappears, and the push rod 211 automatically returns to its initial position. At the same time, the sliding claw 203 automatically returns to its original position under the drive of the slide bar 202 and can be just stuck in the adjacent constraint portion 207, as shown in FIG. Fig. 9 As shown, at this point, the action of the electromagnetic mechanism and the angle control mechanism within one pulse electrical signal is completed, that is, within one pulse electrical signal, the electromagnetic mechanism and the angle control mechanism act once respectively, and after one pulse electrical signal, the sliding claw 203 in the slide bar 202 rotates from one constraint portion 207 to an adjacent constraint portion 207, so that the rotation angle of the slide bar 202 is equal to the angle between the two adjacent constraint portions 207, that is, the center angle corresponding to the constraint portion 207. By reasonably setting the size of the center angle, the rotation angle of the valve core 304 of the solenoid valve under the action of a single pulse signal can be accurately set, thereby achieving precision. The purpose of accurately controlling the opening degree is to send multiple pulse signals to the pulse solenoid valve, so that the electromagnetic mechanism and the angle control mechanism in the pulse solenoid valve can be actuated multiple times, so that the actual opening degree of the valve core 304 reaches the required opening degree; in addition, because the sliding claw 203 will be stuck in the corresponding constraint part 207 before and after the angle control mechanism is actuated, the purpose of constraining the sliding rod 202, the valve stem 305 and the valve core 304 is achieved, so that during the actual use of the pulse solenoid valve, there is no need to continuously power on, which saves electricity and is conducive to heat dissipation, thereby effectively avoiding problems such as heating caused by continuous power on.

[0048] In order to accurately control the angle control mechanism to drive the valve stem 305 to rotate to a set angle during a single action, the constraint portion 207 has multiple implementations. As a preferred embodiment, the constraint portion 207 includes a slot 208 provided at the end of the limit sleeve 206. The slot 208 may be a U-shaped structure to constrain and lock the sliding claw 203 to prevent the sliding claw 203 from rotating. Figure 3 and Figure 6-Figure 10As shown, in a preferred embodiment, the constraint portion 207 also includes a constraint surface 209 arranged between two adjacent grooves 208, and the constraint surface 209 is inclined, and the inclination direction of the constraint surface 209 is opposite to the inclination direction of the second guide surface 212, so that the constraint surface 209 and the second guide surface 212 can form a V-shaped angle, so that after the push rod 211 pushes the sliding claw 203 out of the groove 208, the sliding claw 203 can be stuck in the V-shaped angle and can rotate along the constraint surface 209 as the push rod 211 pushes it, which can not only achieve the purpose of controlling the uniform rotation of the slide rod 202, but also effectively prevent the sliding claw 203 from separating from the second guide surface 212.

[0049] It can be understood that the number of the sliding claws 203 can be determined according to actual needs, and is usually greater than or equal to 1. For example, Figure 1 and Figure 2 As shown, the number of the sliding claws 203 is 4, and they are evenly arranged along the circumferential direction of the sliding rod 202; the constraint portion 207 needs to be adapted to the number of the sliding claws 203, and can be an integer multiple of the number of the sliding claws 203, such as Figure 3 As shown, in this embodiment, the number of the constraint portions 207 is 8, and they are evenly arranged along the circumferential direction of the limiting sleeve 206; the number of the second guide surfaces 212 arranged on the push rod 211 needs to match the number of the constraint portions 207, and each constraint portion 207 only needs to correspond to one second guide surface 212, as shown in FIG. Figure 4-Figure 9 shown.

[0050] like Figure 6-Figure 10 As shown, in this embodiment, the inner diameter of the limit sleeve 206 is larger than the outer diameter of the slide bar 202, and smaller than the sum of the outer diameter of the slide bar 202 and the thickness of the slide claw 203, so that the slide claw 203 can be stuck in the constraint portion 207, and the outer diameter of the push rod 211 is smaller than the inner diameter of the limit sleeve 206, so that the push rod 211 can pass through the limit sleeve 206 to push the slide bar 202 to move.

[0051] Since in the actual working process, both the slide bar 202 and the push rod 211 need to automatically reset after power is off, in one embodiment, a reset spring is also included. The reset spring sleeve is arranged on the slide bar 202 or on one end of the slide bar 202. One end of the reset spring is fixed to the housing 101, and the other end is in contact with the slide bar 202 (not fixedly connected to prevent interference with the rotation of the slide bar 202). The reset spring is used to make the sliding claw 203 clamped into the constraint portion 207 and pressed into the constraint portion 207. When the sliding claw 203 is clamped into the constraint portion 207, the push rod 211 can be squeezed to the initial position (i.e., the position in the power-off state), which can achieve the function of automatic reset and stably lock the sliding claw 203 to the constraint portion 207, which can effectively prevent the valve stem 305 and the valve core 304 from rotating on their own.

[0052] like Fig.10 As shown, in another embodiment, it also includes a return spring 105 and a return spring 205, the return spring 205 is sleeved on the slide bar 202 (equivalent to the aforementioned return spring) or is arranged on one end of the slide bar 202, one end of the return spring 205 is fixed to the shell 101, and the other end is in contact with the slide bar 202, which is used to drive the sliding claw 203 to clamp into the constraint portion 207, and the return spring 105 is sleeved on the pushing portion 210, which is used to provide an elastic force for the push rod 211 in the direction away from the limit sleeve 206; the return spring 105 and the return spring 205 are respectively used to drive the push rod 211 and the slide bar 202 to reset, which is conducive to achieving efficient and rapid reset so that the electromagnetic mechanism and the angle control mechanism can act continuously.

[0053] In order to prevent the push rod 211 from rotating relative to the limit sleeve 206, in one solution, a plurality of guide grooves 217 or guide keys 218 are provided on the outer side of the push rod 211, and a guide key 218 adapted to the guide groove 217 or a guide groove 217 adapted to the guide key 218 is provided on the inner wall of the limit sleeve 206. The push rod 211 is constrained by the cooperation between the guide groove 217 and the guide key 218 to prevent the push rod 211 from rotating.

[0054] In another embodiment, the push portion 210 further includes an extension rod 214 and a guide portion 107 disposed on the housing 101. The extension rod 214 is a rod with a non-circular cross-section. For example, the extension rod 214 can be a square rod. The guide portion 107 is adapted to the extension rod 214. The extension rod 214 is connected to the push rod 211 or is an integral structure, and forms a moving pair with the guide portion 107. The armature 104 is fixed to the extension rod 214. Fig.10 As shown, the guide portion 107 is a guide cylinder or a guide groove 217, so as to constrain the pushing portion 210 to move only along its own axial direction.

[0055] Since the slide bar 202 rotates and moves along its own length direction during the operation of the angle control mechanism, the housing 101 is provided with a second guide portion 213 so that the slide bar 202 can move strictly along its own length direction. Fig.10 and Fig.11 As shown, the second guide portion 213 is a guide cylinder or a guide groove 217, and the cross-section of the slide bar 202 is circular. The second guide portion 213 is adapted to the slide bar 202, and the slide bar 202 and the second guide portion 213 form a moving pair, which can not only move relative to the slide bar 202, but also rotate relative to the slide bar 202.

[0056] Since during the action of the angle control mechanism, the slide rod 202 both rotates and moves axially, and the slide rod 202 only needs to transmit the rotation to the valve stem 305 to drive the valve stem 305 to rotate, in order to solve this problem, one solution also includes a sleeve 215, and the sliding part 201 also includes a limit rod arranged at one end of the slide rod 202, and the sleeve 215 is provided with a through hole 216 passing through the limit rod, and the limit rod is arranged in the through hole 216 and forms a moving pair with the sleeve 215, and the cross-section of the limit rod is a non-circular surface, and the through hole 216 is adapted to the limit rod, and the sleeve 215 is connected to the valve stem 305 (including direct connection and indirect connection, which will not be repeated later). Since the slide rod 202 forms a moving pair with the sleeve 215 through the limit rod, the sliding part 201 can move relative to the sleeve 215 during the operation of the angle control mechanism. Since the cross-section of the limit rod is a non-circular surface, the sliding part 201 can drive the sleeve 215 to rotate together, thereby achieving the purpose of driving the valve stem 305 to rotate.

[0057] like Fig.10 and Fig.11 As shown, as a preferred embodiment, it also includes a sleeve 215, the sleeve 215 is provided with a through hole 216 passing through the slide rod 202, and the through hole 216 is provided with a plurality of guide grooves 217 or guide keys 218 arranged along the central axis direction of the sleeve 215, and the outer side surface of one end of the slide rod 202 is provided with a plurality of guide keys 218 adapted to the guide grooves 217, or a guide groove 217 adapted to the guide keys 218, and the sleeve 215 is connected to the valve stem 305. Through the cooperation of the guide grooves 217 and the guide keys 218, not only can the sleeve 215 and the sliding part 201 form a moving pair, so that the slide rod 202 can move relative to the sleeve 215, but also the slide rod 202 can drive the sleeve 215 to rotate together, thereby achieving the purpose of driving the valve stem 305 to rotate.

[0058] In principle, a set of electromagnetic mechanism and angle control mechanism are arranged in the pulse solenoid valve, and the valve closing function and the valve opening reducing function can be realized by driving the valve core 304 to rotate one circle. However, there is a problem of slow response speed, and it is usually only suitable for occasions with small flow, that is, the diameter of the inlet 301 and the outlet 302 in the pulse solenoid valve should be small, such as low pressure and occasions with a pipe diameter less than 25mm.

[0059] Since the pulse solenoid valve has two processes, opening and closing, in actual use, in order to facilitate the control of opening / closing and opening degree and improve the response speed, as a preferred implementation, Fig.12As shown, the pulse solenoid valve provided in this embodiment includes two sets of electromagnetic mechanisms and angle control mechanisms. For the convenience of description, the two electromagnetic mechanisms are electromagnetic mechanism 1 108 and electromagnetic mechanism 2 109, and the two sets of angle control mechanisms are angle control mechanism 1 219 and angle control mechanism 2 220, wherein the electromagnetic mechanism 1 108 is connected to the angle control mechanism 1 219, and the angle control mechanism 1 219 is connected to the valve stem 1 306 fixed to the valve core 304, as shown in FIG. Fig.12 As shown, it is used to drive the valve stem 306 to rotate forward so as to increase the valve opening or open the valve under the action of the pulse signal; the electromagnetic mechanism 109 is connected to the angle control mechanism 220, and the angle control mechanism 220 is connected to the valve stem 307 fixed to the valve core 304, as shown in FIG. Fig.12 As shown, it is used to drive the valve stem 2 307 to rotate in the opposite direction, so as to reduce the valve opening or close the valve under the action of the pulse signal. The valve stem 1 306 and the valve stem 2 307 are in the same line. Fig.12 As shown, the two sets of electromagnetic mechanisms and angle control mechanisms are respectively arranged at the upper and lower ends of the valve body 300 and are installed symmetrically. For ease of installation, the control terminals 106 of the two sets of electromagnetic mechanisms can also be respectively arranged at the upper shell 101 of the valve body 300.

[0060] Since the electromagnetic mechanism 1 108 and the electromagnetic mechanism 2 109 are used to drive the valve core 304 to rotate forward and reverse respectively, in order to prevent the two sets of angle control mechanisms described in the pulse electromagnetic valve from interfering with each other during the operation process, in this embodiment, as shown in FIG. Fig.10 or Fig.12 As shown, the sliding portion 201 also includes a one-way clutch 400, the sliding rod 202 includes a first section 221 and a second section 222, the sliding claw 203 is arranged on the first section 221, the second section 222 cooperates with the sliding sleeve 215, the first section 221 is connected to the second section 222 through the one-way clutch 400, the first section 221 is used to drive the second section 222 to rotate unidirectionally in one direction through the one-way clutch 400, when the second section 222 rotates in a direction opposite to the direction, the one-way clutch 400 slips, so that the two sets of angle control mechanisms do not interfere with each other during the action process, and the opening / closing of the valve can be effectively realized.

[0061] like Fig.10 or Fig.12 As shown, the one-way clutch 400 preferably adopts a tooth clutch, such as a helical clutch. Example 2

[0062] The main difference between this embodiment 2 and the above-mentioned embodiment 1 is that in the pulse solenoid valve provided in this embodiment, a transmission mechanism is also arranged between the valve stem 305 and the angle control mechanism, one end of the transmission mechanism is connected to the valve stem 305, and the sleeve 215 is arranged at the other end of the transmission mechanism, and the transmission ratio of the transmission mechanism can be greater than 1 or equal to 1.

[0063] In principle, the more the number of constraint parts 207 arranged along the circumferential direction of the limit sleeve 206 is, the smaller the angle of rotation of the valve core 304 will be under the action of a single pulse electrical signal, and the higher the accuracy will be. However, in practice, due to the processing accuracy and the size parameters of the limit sleeve 206, the number of the constraint parts 207 cannot be too many. For this reason, the transmission mechanism can preferentially adopt a reduction transmission mechanism to achieve the purpose of reducing the rotation speed and increasing the torque, that is, the transmission ratio of the transmission mechanism is greater than 1. For example, by setting a transmission mechanism with a transmission ratio of 2, under the action of a single pulse electrical signal, when the slide rod 202 rotates 1 degree, the valve core 304 can only rotate 0.5 degrees, thereby effectively improving the flow regulation accuracy of the pulse solenoid valve.

[0064] Preferably, the reduction transmission mechanism may be a gear transmission mechanism, a worm gear transmission mechanism, or a combination of the two. Fig.10 or Fig.12 As shown, in this embodiment, the reduction transmission mechanism adopts a gear transmission mechanism, and the gear transmission mechanism includes a driving gear 501 and a driven gear 502. The driven gear 502 is fixed to the valve stem 305, and the driving gear 501 is movably connected to the housing 101. The sliding sleeve 215 is movably connected to the housing 101 (such as fixed to the housing 101 through a bearing), and the driving gear 501 is fixed to the sliding sleeve 215 and is coaxial with the sliding sleeve 215. The sliding sleeve 215 cooperates with the sliding rod 202, and the driving gear 501 is meshed with the driven gear 502. The number of teeth of the driven gear 502 is greater than the number of teeth of the driving gear 501, so as to achieve the purpose of reducing the rotation speed and increasing the torque.

[0065] In order to make the structure of the entire solenoid valve more compact for practical installation and use, as another example, the two sets of electromagnetic mechanisms and the angle control mechanism can be arranged above the valve body 300 by reasonably arranging the reduction transmission mechanism, such as Fig.13 As shown, for example, by properly setting the number and position of the gears 503 , both sets of electromagnetic mechanisms and the angle control mechanisms can be arranged above the valve body 300 . Example 3

[0066] Since in the existing solenoid valve, whether the electromagnet and the armature 104 are in action (or attracted) cannot be determined from the outside of the housing 101, in the solenoid valve provided in this embodiment, the push portion 210 (such as the extension rod 214) is further provided with a state detection contact 601, such as Fig.10 As shown, it can be preferentially arranged on the side of the extension rod 214, and the shell 101 is provided with a fixed contact 602. The state detection contact 601 and the fixed contact 602 are respectively connected to two detection terminals 603 arranged on the shell 101, and the detection terminal 603 can be used to connect a controller, such as a single-chip microcomputer, a PLC, etc.; when the slide bar 202 moves to the position farthest from the limit sleeve 206 under the push of the push rod 211, the state detection contact 601 contacts the fixed contact 602, and the state detection circuit is connected at this time. The controller can receive a corresponding signal through the detection terminal 603, indicating that the electromagnet and the armature 104 in the solenoid valve have been actuated, thereby effectively solving the problem that whether the internal electromagnet and the armature 104 are actuated (or attracted) cannot be judged from the outside of the shell 101. Example 4

[0067] The main difference between this embodiment and embodiment 2 is that the pulse solenoid valve provided in this embodiment only includes a set of electromagnetic mechanism and angle control mechanism, and the angle control mechanism is connected to the valve stem 305 through a transmission mechanism, such as a gear reduction transmission mechanism, etc.; it also includes a reversing mechanism, which is arranged in the transmission mechanism to switch the rotation direction of the valve stem 305. As an example, the transmission structure adopts a gear reduction transmission mechanism, including a plurality of mutually meshing gears, and the reversing mechanism can be an idler wheel reversing mechanism, which includes two mutually meshing idler wheels. In one working state, one of the idler wheels is The idler wheel meshes with the gear in the gear reduction transmission mechanism and constitutes a part of the gear reduction transmission mechanism. When reversing is required, the two idler wheels are meshed with the gear reduction transmission mechanism and constitute a part of the gear reduction transmission mechanism. Since the change in the number of gears in the entire gear transmission system will inevitably lead to a change in the transmission direction, the rotation direction of the valve stem 305 and the valve core 304 can be effectively changed, so that the forward and reverse control of the valve core 304 can be achieved by using a set of electromagnetic mechanisms, angle control mechanisms and a reversing mechanism, which is very convenient. It can be understood that the idler wheel reversing mechanism is a commonly used reversing mechanism and will not be described here.

[0068] To facilitate the driving of the reversing mechanism, it is preferred that the electromagnet and the armature 104 cooperate to drive the reversing mechanism, thereby effectively changing the positions of the two idler wheels to switch the transmission direction, and the coil 103 in the electromagnet can be connected to the reversing connector arranged on the shell 101 through a wire, and the reversing connector is connected to the controller to control whether to perform reversing. Example 5

[0069] In order to make the structure of the entire solenoid valve more compact, in a pulse solenoid valve provided in this embodiment, a central through hole is provided at the center of the iron core 102, the armature 104 is provided at one end of the iron core 102, and one end of the extension rod 214 passes through the central through hole and is connected to the armature 104, as shown in FIG. Fig.14 As shown, the inner diameter of the central through hole is larger than the outer diameter of the extension rod 214, and the armature 104 can preferably adopt an annular structure so as to cooperate with the iron core 102; with such a structure, the iron core 102 and the extension rod 214 can form a moving pair, which can not only restrain the extension rod 214 and guide the extension rod 214, but also help the structure of the entire solenoid valve to be more compact and the volume to be more compact; in addition, it can also effectively solve the torque caused by the offset of the electromagnet and the armature, which makes the push part easy to get stuck, and other problems.

[0070] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pulse solenoid valve, characterized in that: It includes a housing, a valve body, an electromagnetic mechanism and an angle control mechanism, the valve body is provided with an inlet and an outlet, the inlet and the outlet are connected through an internal flow channel provided in the valve body, a valve core is provided in the internal flow channel, the valve core is connected to the angle control mechanism through a valve stem, the electromagnetic mechanism is connected to the angle control mechanism, wherein, The electromagnetic mechanism includes an electromagnet and an armature matched with the electromagnet, the armature is connected to the angle control mechanism, the electromagnet includes an iron core and a coil wound around the iron core, and the electromagnetic mechanism is used to drive the angle control mechanism to operate when receiving a pulse electrical signal; The angle control mechanism comprises a sliding part, a limiting sleeve and a pushing part, wherein the sliding part comprises a sliding rod, a plurality of sliding claws arranged at one end of the sliding rod and arranged along the circumferential direction of the sliding rod, one end of the sliding claw is a first guide surface arranged obliquely, and the sliding rod is used to connect the valve stem; the limiting sleeve is fixed to the housing, the limiting sleeve is a cylindrical structure, one end of the limiting sleeve is configured with a plurality of restraining parts for restraining the sliding claws, and each restraining part is respectively distributed along the circumferential direction of the limiting sleeve; the pushing part comprises a push rod of a cylindrical structure, one end of the push rod is obliquely provided with a plurality of second guide surfaces, the second guide surfaces are adapted to the first guide surfaces, and each of the second guide surfaces is respectively distributed along the circumferential direction of the push rod, the armature is fixed to the pushing part, and when the sliding claw is stuck in the restraining part, the first guide surface only contacts with part of the second guide surface; The angle control mechanism is used to drive the valve stem to rotate to a set angle under the drive of the electromagnetic mechanism, and lock the valve stem when the electromagnetic mechanism is powered off to limit the rotation of the valve stem; the valve core is used to rotate under the drive of the valve stem to adjust the opening of the valve body.

2. The pulse solenoid valve according to claim 1, characterized in that: The shell is fixed to the valve body, and the electromagnetic mechanism and the angle control mechanism are respectively fixed in the shell.

3. The pulse solenoid valve according to claim 1, characterized in that: The restraining portion comprises a slot arranged at the end of the limiting sleeve and a restraining surface arranged between two adjacent slots. The restraining surface is arranged obliquely, and the inclination direction of the restraining surface is opposite to the inclination direction of the second guide surface.

4. The pulse solenoid valve according to claim 1, characterized in that: It also includes a return spring, wherein the return spring sleeve is arranged on the slide rod or on one end of the slide rod, one end of the return spring is fixed to the housing, and the other end is in contact with the slide rod, and the return spring is used to make the slide claw clamped into the constraint part; Or, it also includes a return spring 1 and a return spring 2, wherein the return spring 2 is sleeved on the sliding rod or arranged at one end of the sliding rod, one end of the return spring 2 is fixed to the shell, and the other end is in contact with the sliding rod, which is used to drive the sliding claw to engage in the constraint part, and the return spring is sleeved on the pushing part, which is used to provide an elastic force for the push rod in the direction away from the limit sleeve.

5. The pulse solenoid valve according to claim 1, characterized in that: The outer side of the push rod is provided with a plurality of guide grooves or guide keys, and the inner wall of the limit sleeve is provided with guide keys adapted to the guide grooves or guide grooves adapted to the guide keys, and the push rod is constrained by the cooperation of the guide grooves and the guide keys to prevent the push rod from rotating; Or, the pushing part further includes an extension rod and a guide part 1 arranged on the housing, the extension rod is a rod with a non-circular cross-section, the guide part 1 is adapted to the extension rod, the extension rod is arranged to be connected to the push rod or to be an integral structure, and to form a moving pair with the guide part 1, the armature is fixed to the extension rod, and the guide part 1 is a guide cylinder or a guide groove; The housing is provided with a second guide part, which is a guide cylinder or a guide groove, and the cross section of the slide bar is circular. The second guide part is matched with the slide bar, and the slide bar and the second guide part form a moving pair.

6. The pulse solenoid valve according to claim 1, characterized in that: It also includes a sliding sleeve, the sliding part also includes a limiting rod arranged at one end of the sliding rod, the sliding sleeve is provided with a through hole passing through the limiting rod, the limiting rod is arranged in the through hole and forms a moving pair with the sliding sleeve, and the cross section of the limiting rod is a non-circular surface, the through hole is adapted to the limiting rod, and the sliding sleeve is connected to the valve stem; Or, it also includes a sliding sleeve, which is provided with a through hole passing through the sliding rod, and the through hole is provided with a plurality of guide grooves or guide keys arranged along the central axis direction of the sliding sleeve, and the outer side surface of one end of the sliding rod is provided with a plurality of guide keys adapted to the guide grooves, or a guide groove adapted to the guide keys, and the sliding sleeve is connected to the valve stem.

7. The pulse solenoid valve according to claim 6, characterized in that: It includes two sets of electromagnetic mechanisms and angle control mechanisms, the two electromagnetic mechanisms are electromagnetic mechanism one and electromagnetic mechanism two, and the two sets of angle control mechanisms are angle control mechanism one and angle control mechanism two, wherein the electromagnetic mechanism one is connected to the angle control mechanism one, the angle control mechanism one is connected to the valve stem one fixed to the valve core, and is used to drive the valve stem one to rotate in the forward direction; the electromagnetic mechanism two is connected to the angle control mechanism two, the angle control mechanism two is connected to the valve stem two fixed to the valve core, and the valve stem one and the valve stem two are collinear.

8. The pulse solenoid valve according to claim 7, characterized in that: The sliding part also includes a one-way clutch, the sliding rod includes a first section and a second section, the sliding claw is arranged on the first section, the second section cooperates with the sliding sleeve, the first section is connected to the second section through the one-way clutch, the first section is used to drive the second section to rotate unidirectionally in one direction through the one-way clutch, and when the second section rotates in a direction opposite to the direction, the one-way clutch slips.

9. The pulse solenoid valve according to claim 8, characterized in that: The one-way clutch adopts a tooth clutch.

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