Digital control solenoid valve

Abstract

The application discloses a kind of digital control electromagnetic valve, including valve body and installation in the valve body stroke drive module, clutch module, zero position detection mechanism and composite valve position sensing module, the stroke drive module is used to drive the clutch module linear motion to preset direction;The clutch module is used to grab locking and release valve plate drive rod;The zero position detection mechanism is installed in the drive seat and is cooperated with the zero position detection pressure rod, realizes the clutch module driven by the stroke drive module to drop to reference zero;The composite valve position sensing module is cooperated with the annular pressure sheet installed in the valve plate drive rod, and simultaneously outputs two-way valve position signal.The purpose of the application is to provide a kind of digital control electromagnetic valve, realize high-precision stroke drive, controllable clutch locking release, accurate zero position detection and double valve position signal output, improve electromagnetic valve control precision, operating stability and digital adaptation ability.

Description

Technical Field

[0001] This invention belongs to the field of electromagnetic valve control technology, and specifically relates to a digital control electromagnetic valve. Background Technology

[0002] Solenoid valves are widely used actuators in fluid control systems. Traditional solenoid valves generally suffer from problems such as low driving stroke accuracy, rigid connection between the valve stem and the drive mechanism resulting in high load, unreliable power-off reset, inaccurate zero-position reference, and limited valve position feedback function. In digital control scenarios, solenoid valves need to possess capabilities such as high-precision displacement, controllable clutch, automatic zero-position calibration, and dual signal output. However, existing structures struggle to simultaneously meet these requirements, and their low overall integration, complex installation, and insufficient stability make them unsuitable for high-precision automated control systems.

[0003] To address the aforementioned shortcomings, this invention proposes a digitally controlled solenoid valve that achieves integrated digital control of drive, clutch, detection, and feedback through modular integrated design. Summary of the Invention

[0004] The purpose of this invention is to provide a digitally controlled solenoid valve that achieves high-precision stroke drive, controllable clutch locking and release, accurate zero-position detection, and dual valve position signal output, thereby improving the control accuracy, operational stability, and digital adaptability of the solenoid valve.

[0005] To achieve the above objectives, the present invention provides a digitally controlled solenoid valve, comprising a valve body and a stroke drive module, a clutch module, a zero-position detection mechanism, and a composite valve position sensing module mounted on the valve body, wherein: The stroke drive module is used to drive the clutch module to move linearly in a preset direction. The stroke drive module includes a drive base, a linkage unit and a stroke drive rod. The top of the stroke drive rod is provided with a zero-position detection pressure rod. The clutch module is used to grip, lock, and release the valve plate drive rod, and a valve plate for opening and closing the solenoid valve is fixedly installed at the bottom of the valve plate drive rod. The zero-position detection mechanism is installed on the drive seat and cooperates with the zero-position detection pressure rod to realize that the clutch module driven by the stroke drive module descends to the reference zero position and at the same time makes the valve plate drive rod reach the preset position inside the clutch module. The composite valve position sensing module works in conjunction with the annular pressure plate installed on the valve plate drive rod to simultaneously output two valve position signals: one feedback to the solenoid valve itself and the other feedback to external monitoring equipment, thus realizing dual feedback of the solenoid valve's on / off status.

[0006] As a further preferred technical solution to the above technical solution, for the stroke drive module, wherein: The drive base includes a motor mounting area and a drive rod movable hole. The motor mounting area is provided with a motor drive end through hole. The drive base is provided with a first bearing seat and a second bearing seat inside. The linkage unit includes a motor, a primary gear, a secondary gear assembly, and a tertiary gear. The motor is installed in the motor mounting area, and the drive end of the motor passes through the motor drive end through hole and is coaxially connected to the primary gear. The primary gear meshes with the lower gear of the secondary gear assembly, and the tertiary gear meshes with the upper gear of the secondary gear assembly. The first bearing seat is installed on the top of the tertiary gear, and the second bearing seat is installed on the bottom of the tertiary gear. The tertiary gear has an internal thread structure in the middle. The stroke drive rod has an external thread structure, the stroke drive rod passes through the middle of the three-stage gear, and the external thread structure and the internal thread structure are connected in a mating manner.

[0007] As a further preferred embodiment of the above technical solution, the clutch module includes a clutch mounting base and a clutch actuation unit, wherein the clutch actuation unit is built into the clutch mounting base, wherein: The clutch mounting base is equipped with a stroke drive rod on its top and a valve plate drive rod on its bottom. The valve plate drive rod is provided with a ball bearing groove on its side. The clutch actuation unit includes a coil mounting bracket, a coil, a core mounting sleeve, a fixed core, a moving core, a ball bearing mounting seat, and a clutch spring. The coil mounting bracket is built into the clutch mounting seat, and the coil is sleeved on the coil mounting bracket. The core mounting sleeve is surrounded by the coil mounting bracket. The fixed core and the moving core are both mounted on the core mounting sleeve, with the moving core positioned above the fixed core. The inner wall of the moving core has a chamfered ring, and the fixed core has an opening through which the valve plate drive rod passes. The ball bearing mounting seat is partially surrounded by the moving core, and its bottom is fixedly connected to the fixed core. Several balls are provided on the side wall of the ball bearing mounting seat. The clutch spring is installed between the top of the ball bearing mounting seat and the moving core.

[0008] As a further preferred technical solution of the above technical solution, the clutch mounting seat is built into the solenoid valve and a plurality of clutch guide blocks are provided around the clutch mounting seat. The clutch guide blocks cooperate with the clutch guide groove provided inside the valve body, so that the motor steadily drives the clutch mounting seat to move through the stroke drive rod. The bottom of the stroke drive rod is fixedly sleeved with a moving iron core push block, and the moving iron core push block is located on the top inner side of the clutch mounting seat. The bottom of the stroke drive rod is provided with a smooth outer wall moving section, and the moving section is located above the moving iron core push block.

[0009] As a further preferred technical solution to the above technical solution, the zero-position detection mechanism includes a second detection body, a second detection base plate, a zero-position detection block, a photoelectric sensor, and a miniature alarm switch, wherein: The second detection body is provided with a first detection spring mounting slot, a second detection spring mounting slot, and a pressure block moving area; the pressure block moving area includes a first guide area, a second guide area, a third guide area, a photoelectric detection board moving area, and a fault detection board moving area; The second detection base plate is connected to the second detection body, and the photoelectric sensor and the miniature alarm switch are both mounted on the second detection base plate; The zero-position detection block includes a pressing contact plate, a first guide post, a second guide post, a third guide post, a photoelectric detection plate, and a fault detection plate. The bottom of the pressing contact plate has a first spring mounting end and a second spring mounting end. The first guide post, second guide post, third guide post, photoelectric detection plate, and fault detection plate are respectively installed in the first guide area, second guide area, third guide area, photoelectric detection plate moving area, and fault detection plate moving area. The photoelectric detection plate is aligned with the detection area of ​​the photoelectric sensor, and the fault detection plate is aligned with the miniature alarm switch. The zero-position detection rod is used to press down the pressing contact plate. A second detection spring is provided between the first spring mounting end and the first detection spring mounting slot, and a third detection spring is provided between the second spring mounting end and the second detection spring mounting slot.

[0010] As a further preferred technical solution to the above technical solution, the composite valve position sensing module includes a miniature position feedback detection mechanism, a valve position monitoring mechanism, and an integrated mounting mechanism, wherein: The miniature position feedback detection mechanism includes a first detection body, a first detection base plate, a first detection pressure plate, a first miniature switch, a first interface, a first detection spring, and a first position adjustment screw; the first detection pressure plate is provided with an integrally formed pressing section, a contact section, and a mounting section; The valve position monitoring mechanism includes a first monitoring body, a first shaft, a first monitoring pressure plate, a second micro switch, a second interface, and a first monitoring spring; the first monitoring pressure plate is provided with an integrally formed lower section, a transition section, and an upper section; The first side of the integrated installation mechanism is integrally formed with the first detection body, and the second side of the integrated installation mechanism is integrally formed with the first monitoring body. The integrated installation mechanism has a central circular area. The pressing section and the moving section face each other and are both located in the central circular area. The annular pressure plate is located above the central circular area and presses against the pressing section and the moving section simultaneously when the solenoid valve is closed.

[0011] As a further preferred embodiment of the above technical solution, the valve body is provided with an input end and an output end, a cavity is provided between the input end and the output end and the cavity is provided with a valve port, the valve plate is located above the valve port, and a valve plate composite spring is provided between the top of the valve plate and the interior of the valve body.

[0012] The beneficial effects of this invention are as follows: 1. High driving precision: It adopts a three-stage gear reduction combined with a ball screw drive, which ensures stable stroke control and precise displacement. The bearing support structure reduces vibration and noise and extends service life.

[0013] 2. Safe and reliable clutch: Normally open type electric control clutch, which locks when energized and releases automatically when de-energized. With the help of the guide structure, the operation is smooth, reducing the motor load and avoiding jamming.

[0014] 3. Precise zero-position self-testing: Photoelectric zero-position detection combined with a multi-guided stabilizing structure ensures accurate positioning; it also features sensor fault alarm function to enhance system safety.

[0015] 4. Dual valve position feedback: The integrated system provides two valve position signal outputs, simultaneously satisfying the internal control of the solenoid valve and the monitoring of external equipment, and is compatible with digital control systems.

[0016] 5. Fast and stable reset: The valve plate composite spring, combined with the clutch release mechanism, enables the solenoid valve to close quickly and respond promptly to on / off conditions.

[0017] 6. High integration and easy assembly: The fully modular integrated design is compact, easy to install, and adaptable to various fluid control scenarios. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention.

[0019] Figure 2 This is a cross-sectional view of the present invention (clutch module release valve plate drive rod state).

[0020] Figure 3 This is a cross-sectional view of the present invention (clutch module gripping the locking valve plate drive rod).

[0021] Figure 4 This is a schematic diagram of the stroke drive module of the present invention.

[0022] Figure 5 This is a schematic diagram of the stroke drive module of the present invention.

[0023] Figure 6 This is a schematic diagram of the drive seat of the present invention.

[0024] Figure 7This is a schematic diagram of the structure of the present invention (in the detached and released state).

[0025] Figure 8 This is a cross-sectional view of the present invention (in the detached and released state).

[0026] Figure 9 This is a cross-sectional view of the present invention (grabbing and locking state).

[0027] Figure 10 This is a schematic diagram of the zero-position detection mechanism of the present invention.

[0028] Figure 11 This is a schematic diagram of the structure of the second detection body of the present invention.

[0029] Figure 12 This is a schematic diagram of the zero-position detection mechanism of the present invention (the second detection body is hidden).

[0030] Figure 13 This is a schematic diagram of the zero-position detection mechanism of the present invention (the second detection body is hidden).

[0031] Figure 14 This is a schematic diagram of the composite valve position sensing module of the present invention.

[0032] Figure 15 This is a schematic diagram of the composite valve position sensing module of the present invention.

[0033] Figure 16 This is a cross-sectional view of the composite valve position sensing module of the present invention.

[0034] Figure 17 This is a schematic diagram of the structure of the miniature position feedback detection mechanism of the present invention.

[0035] Figure 18 This is a schematic diagram of the micro position feedback detection mechanism of the present invention (the first detection pressure plate is omitted).

[0036] Figure 19 This is a schematic diagram of the structure of the first detection subject of the present invention.

[0037] Figure 20 This is a schematic diagram of the valve position monitoring mechanism of the present invention.

[0038] Figure 21 This is a schematic diagram of the valve position monitoring mechanism of the present invention.

[0039] Figure 22 This is a cross-sectional view of the valve position monitoring mechanism of the present invention.

[0040] Figure 23 This is a schematic diagram of the structure of the first monitoring subject of the present invention.

[0041] The reference numerals in the attached drawings include: 100, valve body; 110, input end; 120, output end; 130, cavity; 131, valve port; 140, valve plate; 150, valve plate composite spring; 200, stroke drive module; 210, drive seat; 211, motor mounting area; 212, drive rod movable hole; 213, motor drive end through hole; 214, first bearing seat; 215, second bearing seat; 220, linkage unit; 221, motor; 222, first stage gear; 223, second stage gear assembly; 224, third stage gear; 230, stroke drive rod; 231, moving iron core push block; 232, moving section; 233, zero position detection pressure rod; 300, clutch module; 3 10. Clutch mounting seat; 311. Valve plate drive rod; 312. Steel ball slot; 313. Clutch guide block; 314. Annular pressure plate; 321. Coil mounting bracket; 322. Coil; 323. Iron core mounting sleeve; 3231. Moving iron core limit block; 324. Fixed iron core; 3241. Fixed iron core opening; 325. Moving iron core; 3251. Inclined chamfered structure; 3252. Clutch spring contact end; 326. Steel ball mounting seat; 3261. Steel ball; 327. Clutch spring; 400. Zero position detection mechanism; 410. Second detection body; 411. First detection spring mounting slot; 412. Second detection spring mounting slot; 413. First guide area Domain; 414, Second guide area; 415, Third guide area; 416, Photoelectric detection board active area; 417, Fault detection board active area; 420, Second detection base plate; 421, Zero position signal output terminal; 430, Zero position detection pressure block; 431, Press-down contact plate; 432, First guide post; 433, Second guide post; 434, Third guide post; 435, Photoelectric detection board; 436, Fault detection board; 437, First spring mounting end; 438, Second spring mounting end; 440, Photoelectric sensor; 450, Miniature alarm switch; 460, Second detection spring; 470, Third detection spring; 500, Composite valve position sensing module; 5 10. Miniature position feedback detection mechanism; 511. First detection body; 5111. First switch mounting area; 5112. First interface mounting area; 5113. First spring mounting rod; 5114. Screw mounting hole; 5115. First limiting protrusion; 5116. Second limiting protrusion; 512. First detection base plate; 513. First detection pressure plate; 5131. Pressing section; 5132. Contact section; 5133. Mounting section; 5134. First mounting hole; 5135. Second mounting hole; 514. First miniature switch; 515. First interface; 516. First detection spring; 517. First position adjusting screw; 520. Valve position monitoring mechanism;521-First monitoring body; 5211-First shaft mounting slot; 5212-Second shaft mounting slot; 5213-First end limiting block; 5214-Second end limiting block; 5215-Second switch mounting area; 5216-Second interface mounting area; 5217-Monitoring spring mounting slot; 5218-Pressure plate mounting slot; 5219-Switch mounting slot; 522-First shaft; 523-First monitoring pressure plate; 5231-Lower section; 5232-Transition section; 5233-Upper section; 524-Second micro switch; 5241-Card plate; 525-Second interface; 526-First monitoring spring; 530-Integrated mounting mechanism; 531-Middle circular area. Detailed Implementation

[0042] The following description is intended to disclose the present invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0043] In the preferred embodiments of the present invention, those skilled in the art should note that the input terminals, output terminals, etc. involved in the present invention can be regarded as prior art.

[0044] Preferred embodiment.

[0045] This invention discloses a digitally controlled solenoid valve, comprising a valve body 100 and a stroke drive module 200, a clutch module 300, a zero-position detection mechanism 400, and a composite valve position sensing module 500 mounted on the valve body 100, wherein: The stroke drive module 200 is used to drive the clutch module 300 to move linearly in a preset direction. The stroke drive module 200 includes a drive seat 210, a linkage unit 220 and a stroke drive rod 230. The top of the stroke drive rod 230 is provided with a zero-position detection pressure rod 233. The clutch module 300 is used to grip, lock, and release the valve plate drive rod 311. A valve plate 140 for opening and closing the solenoid valve is fixedly installed at the bottom of the valve plate drive rod 311. The zero-position detection mechanism 400 is installed on the drive seat 210 and cooperates with the zero-position detection pressure rod 233 to realize that the clutch module 300 driven by the stroke drive module 200 descends to the reference zero position and at the same time makes the valve plate drive rod 311 reach the preset position inside the clutch module 300. The composite valve position sensing module 500 cooperates with the annular pressure plate 314 installed on the valve plate drive rod 311 to output two valve position signals simultaneously: one is fed back to the solenoid valve itself and the other is fed back to the external device for monitoring, realizing dual feedback of the solenoid valve's on / off status (adapted to digital control systems).

[0046] 1. For stroke-driven modules, such as Figure 4-6 As shown, where: The drive base 210 includes a motor mounting area 211 and a drive rod movable hole 212. The motor mounting area 211 is provided with a motor drive end through hole 213. The drive base 210 is provided with a first bearing seat 214 and a second bearing seat 215 inside. The linkage unit 220 includes a motor 221, a primary gear 222, a secondary gear assembly 223, and a tertiary gear 224. The motor 221 is mounted in the motor mounting area 211, and the drive end of the motor 221 passes through the motor drive end through hole 213 and is coaxially connected to the primary gear 222. The primary gear 222 meshes with the lower gear of the secondary gear assembly 223, and the tertiary gear 224 meshes with the upper gear of the secondary gear assembly 223. The first bearing seat 214 is mounted on the top of the tertiary gear 224, and the second bearing seat 215 is mounted on the bottom of the tertiary gear 224 (to securely mount the tertiary gear to the drive seat and keep it stable during rotation). The tertiary gear 224 has an internal thread structure (not shown) in the middle. The stroke drive rod 230 is provided with an external thread structure (not shown). The stroke drive rod 230 passes through the middle of the three-stage gear 224 and the external thread structure and the internal thread structure are connected in a mating manner.

[0047] The motor 221 is fixedly mounted on the top of the drive base 210 by bolts, and the first-stage gear 222, the second-stage gear assembly 223, and the third-stage gear 224 are all located at the bottom of the drive base.

[0048] For the secondary gear assembly 223, the lower gear and the upper gear are coaxially and fixedly connected.

[0049] The drive base 210 is provided with several fixing holes (the fixing holes, together with bolts, securely install the stroke drive module in the preset position of the solenoid valve).

[0050] The stroke drive rod 230 passes through the drive rod movable hole 212.

[0051] The working principle of the travel drive module is as follows: When the solenoid valve needs to be opened, the motor is started. The motor drive end drives the first-stage gear to rotate. The first-stage gear meshes and drives the second-stage gear assembly to rotate. The second-stage gear assembly meshes and drives the third-stage gear to rotate. The third-stage gear, through its internal thread structure, engages with the external thread structure of the stroke drive rod, converting the rotational motion into linear motion. This causes the stroke drive rod to move upward relative to the third-stage gear, which in turn causes the valve plate mounted on the valve plate drive rod to move upward, thereby opening the solenoid valve.

[0052] 2. For the clutch module, such as Figure 7-9 As shown, it includes a clutch mounting base 310 and a clutch actuation unit, wherein the clutch actuation unit is built into the clutch mounting base 310, wherein: The clutch mounting base 310 is equipped with a stroke drive rod 230 on its top (which is driven up and down by a motor, thereby driving the clutch mounting base to move up and down), and the clutch mounting base 310 is equipped with a valve plate drive rod 311 at its bottom (the bottom of the valve plate drive rod is equipped with a valve plate; moving the valve plate up opens the solenoid valve, and moving it down closes the solenoid valve). The valve plate drive rod 311 is equipped with a ball bearing groove 312 on its side. The clutch actuation unit includes a coil mounting bracket 321, a coil 322, a core mounting sleeve 323, a fixed core 324, a moving core 325, a ball bearing mounting seat 326, and a clutch spring 327. The coil mounting bracket 321 is built into the clutch mounting seat 310, and the coil 322 is sleeved on the coil mounting bracket 321. The core mounting sleeve 323 is surrounded by the coil mounting bracket 321. The fixed core 324 and the moving core 325 are both mounted on the core mounting sleeve 323. 3. The moving iron core 325 is located above the fixed iron core 324. The inner wall of the moving iron core 325 is provided with a ring of inclined chamfered structure 3251, and the fixed iron core 324 is provided with a fixed iron core opening 3241 through which the valve plate drive rod passes. The ball bearing mounting seat 326 is partially surrounded by the moving iron core 325, and the bottom of the ball bearing mounting seat 326 is fixedly connected to the fixed iron core 324. The side wall of the ball bearing mounting seat 326 is provided with a plurality of (micro-movable) ball bearings 32. 61 (The side wall is provided with several steel ball holes, the diameter of which is slightly larger than that of the steel ball. The steel ball can move slightly left and right relative to the steel ball hole but will not detach from the steel ball hole.) The steel ball 3261 is used to engage with the steel ball slot 312. The clutch spring 327 is installed between the top of the steel ball mounting seat 326 and the moving iron core 325. (When it is necessary to start the solenoid valve and grab the fixed valve plate drive rod, the motor first drives the clutch mounting seat to move down through the stroke drive rod, and then relative to the top of the valve plate drive rod along the opening of the fixed iron core...) The clutch assembly sequentially enters the ball bearing mounting base and the fixed iron core. When the clutch mounting base moves down to the preset position, the ball bearing slot is surrounded by a ring of steel balls. At this time, the coil is energized and, in conjunction with the fixed iron core, moves the moving iron core downward to attract it. The clutch spring is compressed, and during the downward movement of the moving iron core, the inclined chamfered structure contacts the first side of the steel ball and pushes the second side of the steel ball closer to the ball bearing slot. At this time, the first side of the steel ball is limited by the inclined chamfered structure, so the steel ball is stuck in the ball bearing slot. This completes the gripping and fixing of the valve plate drive rod. Figure 3 and 9 As shown; then the motor reverses, and the clutch mounting seat is moved upward through the stroke drive rod, the steel ball is stuck in the steel ball slot, and at the same time the valve plate drive rod is moved upward, thereby opening the solenoid valve; when it is necessary to close the solenoid valve, the coil is de-energized, and the moving iron core moves upward relative to the fixed iron core under the recovery of the clutch spring. The inclined chamfer structure releases the restriction on the first side of the steel ball, and the valve plate drive rod, under its own weight and the recovery of the external spring, pushes the steel ball back to the side closer to the moving iron core. The steel ball can no longer be stuck in the steel ball slot, so the entire valve plate drive rod moves downward until the valve plate is closed, as shown. Figure 2 and 8 (As shown).

[0053] Specifically, the clutch mounting base 310 is built into the solenoid valve and a plurality of clutch guide blocks 313 are provided around the clutch mounting base 310. The clutch guide blocks 313 cooperate with the clutch guide groove provided inside the valve body 100, so that the motor steadily drives the clutch mounting base to move through the stroke drive rod.

[0054] More specifically, a moving iron core push block 231 is fixedly sleeved at the bottom of the stroke drive rod 230, and the moving iron core push block 231 is located on the top inner side of the clutch mounting base 310. The bottom of the stroke drive rod 230 has a smooth outer wall moving section 232, and the moving section 232 is located above the moving iron core push block 231. (When the solenoid valve needs to be opened, the clutch action unit first needs to move down to grab and fix the valve plate drive rod, and then move the valve plate drive rod up, causing the valve plate fixedly installed at the bottom of the valve plate drive rod to open. The initial motor drives the clutch through the stroke drive rod.) When the mounting base moves down, the clutch mounting base is suspended by its own weight on the top of the moving iron core push block and moves down together (the top of the clutch mounting base has an opening for the bottom of the stroke drive rod to extend into; when it moves down, the bottom of the opening is suspended on the top of the moving iron core push block and thus moves down with the stroke drive rod). When the clutch mounting base moves down to the preset position, it is stopped. At this time, the motor continues to drive the stroke drive rod to move down a preset distance, so that the moving section moves down relative to the opening, thereby driving the moving iron core push block to move down and press down the moving iron core a certain distance. With the help of the coil and the fixed iron core, it is ensured that the moving iron core can be attracted and moved down).

[0055] Furthermore, the inner wall of the iron core mounting sleeve 323 is provided with a moving iron core limiting block 3231 (to prevent the moving iron core from moving excessively upward and disengaging from the iron core mounting sleeve under the return of the clutch spring, thereby securing the moving iron core in the iron core mounting sleeve).

[0056] Furthermore, the inner wall of the moving iron core 325 is provided with a clutch spring contact end 3252, and the top of the clutch spring 327 abuts against the clutch spring contact end 3252 (thereby firmly installing the clutch spring between the moving iron core and the steel ball mounting seat).

[0057] The working process of the clutch module is as follows: Opening: The motor drives the stroke drive rod to move down → the clutch mounting seat moves down → the valve plate drive rod extends in → the steel ball aligns with the steel ball slot → the coil is energized → the moving iron core moves down → the tilted chamfer squeezes the steel ball to lock the steel ball slot → the motor reverses and moves up → the valve plate opens.

[0058] Closure: Coil de-energized → Clutch spring resets → Moving iron core moves upward → Steel ball dislodged from steel ball groove → Valve plate drive rod falls → Valve plate closes.

[0059] 3. For zero-point detection agencies, such as Figure 10-13As shown, it includes a second detection body 410, a second detection base plate 420 (micro circuit board), a zero-position detection pressure block 430, a photoelectric sensor 440, and a micro alarm switch 450, wherein: The second detection body 410 is provided with a first detection spring mounting groove 411, a second detection spring mounting groove 412 and a pressure block moving area; the pressure block moving area includes a first guide area 413, a second guide area 414, a third guide area 415, a photoelectric detection board moving area 416 and a fault detection board moving area 417; The second detection base plate 420 is connected to the second detection body 410, and the photoelectric sensor 440 and the miniature alarm switch 450 are both installed on the second detection base plate 420; The zero-position detection block 430 is provided with a pressing contact plate 431, a first guide post 432, a second guide post 433, a third guide post 434, a photoelectric detection plate 435, and a fault detection plate 436. The bottom of the pressing contact plate 431 is provided with a first spring mounting 437 and a second spring mounting end 438. The first guide post, the second guide post, the third guide post, the photoelectric detection plate, and the fault detection plate are respectively installed in the first guide area, the second guide area, the third guide area, the photoelectric detection plate moving area, and the fault detection plate moving area. The photoelectric detection plate is aligned with the detection area of ​​the photoelectric sensor, and the fault detection plate is aligned with the miniature alarm switch. The zero-position detection rod 233 is used to press down the pressing contact plate 431. A second detection spring 460 is provided between the first spring mounting end 437 and the first detection spring mounting groove 411, and a third detection spring 470 is provided between the second spring mounting end 438 and the second detection spring mounting groove 412.

[0060] Specifically, one side of the photoelectric detection plate 435 and one side of the fault detection plate 436 are in close contact, the first guide post 432 is located on the side of the photoelectric detection plate 435 away from the fault detection plate 436, and the second guide post 433 and the third guide post 434 are located on the side of the fault detection plate 436 away from the photoelectric detection plate 435.

[0061] More specifically, the second detection spring 460 and the third detection spring 470 are located on both sides of the fault detection plate 436.

[0062] Furthermore, the second detection base plate 420 is provided with a zero-position signal output terminal 421.

[0063] Furthermore, the second detection base plate 420 is fixedly connected to the second detection body 410 by bolts.

[0064] The working principle of the zero-position detection mechanism: When a solenoid valve is working, it often needs to perform zero-position detection. The zero position is used as a reference to make it easier to determine the precise position and status of the relevant parts of the solenoid valve. In this embodiment, when the solenoid valve is working, the zero-position detection rod follows the stroke drive rod to press down on the contact plate and apply pressure, thereby driving the zero-position detection block to move downwards in the block movement area. The first to third guide columns ensure a stable downward movement without shaking, improving detection accuracy. During the downward movement, the photoelectric detection plate reaches the detection area of ​​the photoelectric sensor and is triggered (at this time, the fault switch is not triggered), and a zero-position signal is output from the zero-position signal output terminal. The zero-position detection block stops being pressed and moving downwards. At this time, the valve plate drive rod of the solenoid valve moves down to the zero position, which is convenient for subsequent operation based on this position. During the downward movement of the zero-position detection block, the second / third detection spring is compressed, which facilitates the subsequent reset of the zero-position detection block. If the photoelectric sensor malfunctions, the photoelectric detection plate will continue to move downwards after reaching the detection area without triggering, until the fault detection plate touches the miniature alarm switch, thereby outputting an alarm signal at the zero-position signal output terminal, indicating that the photoelectric sensor has malfunctioned and needs repair.

[0065] 4. For composite valve position sensing modules, such as Figure 14-23 As shown, it includes a miniature position feedback detection mechanism 510, a valve position monitoring mechanism 520, and an integrated mounting mechanism 530, wherein: The miniature position feedback detection mechanism 510 (which outputs a valve position opening and closing signal to the solenoid valve itself) includes a first detection body 511, a first detection base plate 512 (miniature circuit board), a first detection pressure plate 513, a first miniature switch 514, a first interface 515, a first detection spring 516, and a first position adjusting screw 517; the first detection pressure plate 513 is provided with an integrally formed pressing section 5131, a contact section 5132, and a mounting section 5133; The valve position monitoring mechanism 520 (which outputs a valve position opening and closing signal to an external device connected to the solenoid valve) includes a first monitoring body 521, a first shaft 522, a first monitoring plate 523, a second micro switch 524, a second interface 525, and a first monitoring spring 526; the first monitoring plate 523 is provided with an integrally formed lower section 5231, a transition section 5232, and an upper section 5233; The first side of the integrated installation mechanism 530 is integrally formed with the first detection body 511, and the second side of the integrated installation mechanism 530 is integrally formed with the first monitoring body 521. The integrated installation mechanism 530 has a central circular area 531. The pressing section 5131 and the moving section 5231 face each other and are both located in the central circular area 531. The annular pressure plate 314 is located above the central circular area 531 and presses on both the pressing section 5131 and the moving section 5231 simultaneously when the solenoid valve is closed. Specifically, for the miniature position feedback detection mechanism 510, the first detection body 511 is provided with a first switch mounting area 5111, a first interface mounting area 5112, a first spring mounting rod 5113 and a screw mounting hole 5114, and the first spring mounting rod 5113 is located between the first switch mounting area 5111 and the screw mounting hole 5114. The first detection base plate 512 is installed below the first detection body 511, and the first micro switch 514 and the first interface 515 are both installed on the first detection base plate 511. The first micro switch 514 is located in the first switch mounting area 5111 and the first interface 515 is located in the first interface mounting area 5112. The contact section 5132 is located between the pressing section 5131 and the mounting section 5133. The pressing section 5131 is external to the first detection body 511 and the contact section 5132 is located above the first micro switch 514. The mounting section 5133 is provided with a first mounting hole 5134 and a second mounting hole portion 5135. The top of the first spring mounting rod 5113 is located at the first mounting hole portion 5134 and the second mounting hole portion 5135 is aligned with the screw mounting hole 5114. The first detection spring 516 is sleeved on the first spring mounting rod 6113 and is located between the first detection body 511 and the first mounting hole 5134; the first position adjusting screw 517 passes through the second mounting hole 5135 and is installed in the screw mounting hole 5114 (the first detection pressure plate is installed on the first inspection body through the first position adjusting screw). The valve body of the solenoid valve needs to be detected and fed back to determine whether the valve body is closed or open. In this embodiment, when the valve body falls to close, the accessories installed on the valve body move down together and apply a downward force to the lower pressure section, so that the contact section moves down to touch the first micro switch to trigger it, thereby outputting a valve body closing signal at the first interface. At this time, the mounting section also moves down a certain distance and the first detection spring is compressed. When the valve body of the solenoid valve moves up to open, there is no downward force on the lower pressure section. Due to the restoring force of the first detection spring, the first detection pressure plate returns to its original position, and the contact section no longer presses down to trigger the first micro switch, thereby causing the first micro switch to output a valve body opening signal through the first interface.

[0066] Specifically, the first switch mounting area 5111 is provided with a first limiting protrusion 5115 and a second limiting protrusion 5116 facing each other. The first limiting protrusion 5115 and the second limiting protrusion 5116 are both located above the contact segment 5132 (the first / second limiting protrusions are used to limit the contact segment to the first switch mounting area and to the first micro switch, ensuring that the contact segment can stably trigger the first micro switch).

[0067] More specifically, for the first detection tablet 513, the heights of the pressing section 5131, the contact section 5132, and the mounting section 5133 increase sequentially.

[0068] Furthermore, the first position adjusting screw 517 is threadedly connected to the screw mounting hole 5114 (which can adjust the degree to which the screw is installed in the screw mounting hole, thereby cooperating with the first detection spring to adjust the distance between the contact section and the first micro switch, so as to meet the different pressing distances of the pressing section).

[0069] Specifically, for the valve position monitoring mechanism 520, the first monitoring body 521 has a shaft mounting area, a second switch mounting area 5215, a second interface mounting area 5216 and a monitoring spring mounting groove 5127 inside. The shaft mounting area includes a first shaft mounting groove 5211, a second shaft mounting groove 52125, a first end limit block 213 and a second end limit block 5214. The middle part of the first shaft 522 is installed in the first shaft mounting groove 5211 and the second shaft mounting groove 5212 and below the first shaft mounting groove 5211 and the second shaft mounting groove 5212. The first end of the first shaft 522 is installed above the first end limiting block 52135 and the second end of the first shaft 522 is installed above the second end limiting block 214 (thereby the first shaft is securely installed in the shaft mounting area). The second micro switch 524 is located in the second switch mounting area 5215 and the second interface 525 is located in the second interface mounting area 5216. The second micro switch 524 and the second interface 525 are connected. The transition section 5232 is located between the lower section 5231 and the upper section 5233. The lower section 5231 is external to the first monitoring body 521 and the upper section 5233 is located below the second micro switch 524. The top of the transition section 5232 is installed in the pressure plate mounting groove 5218 located between the first shaft mounting groove 5211 and the second shaft mounting groove 5212. The bottom of the transition section 5232 surrounds the first shaft 522 (so that the transition section is stably installed between the first shaft and the pressure plate mounting groove to ensure subsequent pressure triggering). The top of the first monitoring spring 526 is installed in the monitoring spring mounting slot 5217 and the bottom of the first monitoring spring 526 abuts against the upper moving section 5233 (the valve body of the solenoid valve needs to be detected and fed back to determine whether the valve body is closed or open. In this embodiment, when the valve body falls to close, the accessories installed on the valve body move down together and apply a downward force to the lower moving section, so that the transition section of the first monitoring plate rotates around the shifting shaft, so that the upper moving section moves up to touch the second micro switch to trigger it, thereby outputting a valve body closing signal at the second interface. At this time, the first monitoring spring is compressed; when the valve body of the solenoid valve moves up to open, there is no downward force in the lower pressing section. Due to the restoring force of the first monitoring spring, the first monitoring plate returns to its original position, and the upper moving section no longer presses up to trigger the second micro switch, thereby causing the second micro switch to output a valve body opening signal through the second interface).

[0070] Specifically, the first end limiting block 5213 is located on the side of the first shaft mounting groove 5211 away from the second shaft mounting groove 5212, and the second end limiting block 5214 is located on the side of the second shaft mounting groove 5212 away from the first shaft mounting groove 5211.

[0071] More specifically, the second switch mounting area 5215 is provided with a switch mounting slot 5219 and the second micro switch 524 is provided with a retaining plate 5241, which is inserted into the switch mounting slot 5219 (so that the second micro switch is securely mounted on the first monitoring body).

[0072] The working process of the composite valve position sensing module is as follows: When the solenoid valve body is closed, the annular pressure plate moves down to the middle circular area, simultaneously pushing the downward pressure section and the downward movement section: 1. The first detection tablet moves downward, the contact section triggers the first micro switch, the first interface outputs a valve body closing signal, and the first detection spring is compressed; 2. The first monitoring plate rotates around the first shaft, and the upward section triggers the second micro switch. The second interface outputs a valve body closing signal, and the first monitoring spring is compressed.

[0073] 3. When the solenoid valve body opens, the annular pressure plate moves upward, and the downward pressure section and the downward movement section lose pressure: 4. The first detection spring resets, causing the first detection pressure plate to return to its original position, the contact section disengages from the first micro switch, and the first interface outputs a valve body opening signal; 5. The first monitoring spring resets, causing the first monitoring pressure plate to return to its original position. The upper section disengages from the second micro switch, and the second interface outputs a valve body opening signal.

[0074] For the valve body, such as Figure 1-3 As shown, the valve body has an input end 110 and an output end 120. A cavity 130 is provided between the input end 110 and the output end 120, and the cavity 130 has a valve port 131. The valve plate 140 is located above the valve port 131 (gas flows into the cavity from the input end, and then flows into the output end through the valve port and is finally output. When the valve plate covers the valve port, the solenoid valve is closed; when the valve plate does not cover the valve port, the solenoid valve is open). A valve plate composite spring 150 is provided between the top of the valve plate 140 and the interior of the valve body 110 (when the clutch module releases the valve plate drive rod, the weight of the valve plate drive rod itself, combined with the restoring force of the valve plate composite spring, quickly falls back to cover the valve port, thereby quickly closing the solenoid valve).

[0075] For the present invention: I. Solenoid valve opening procedure: 1. The motor of the stroke drive module 200 starts, and the stroke drive rod 230 moves downward linearly through a three-stage gear reduction, which in turn moves the clutch module 300 downward. 2. The zero-position detection lever 233 presses down on the zero-position detection mechanism 400, triggering the photoelectric sensor to output a zero-position signal, confirming that the reference position (i.e., the reference zero position) has been reached, and the valve plate drive rod 311 enters the preset position within the clutch module 300; 3. When the coil of the clutch module 300 is energized, the moving iron core moves downward, and the tilted and chamfered angle compresses the steel ball, which then engages with the steel ball slot of the valve plate drive rod 311, completing the locking process. Figure 3 and 9 As shown; 4. When the motor reverses, the stroke drive rod 230 moves upward, causing the clutch module 300 and the valve plate drive rod 311 to rise synchronously, the valve plate 140 disengages from the valve port, and the solenoid valve opens. 5. As the annular pressure plate 314 rises with the valve plate drive rod 311, the two detection pressure plates of the composite valve position sensing module 500 are reset, and the valve position opening signal is output.

[0076] II. Solenoid valve closing procedure: 1. When the coil of clutch module 300 is de-energized, the clutch spring pushes the moving iron core upward to reset, and the steel ball is released from the valve plate drive rod 311; 2. Under the combined action of its own weight and the valve plate spring, the valve plate drive rod 311 falls rapidly back, the valve plate 140 covers the valve port, and the solenoid valve closes. Figure 2 and 8 As shown; 3. As the annular pressure plate 314 descends with the valve plate drive rod 311, it synchronously presses down the pressing section and the moving section of the composite valve position sensing module 500, triggering the two micro switches and simultaneously outputting a valve position closed signal.

[0077] It is worth mentioning that the technical features such as the input end and output end involved in this patent application should be regarded as prior art. The specific structure, working principle and possible control method and spatial arrangement of these technical features can be adopted by conventional choices in the field, and should not be regarded as the inventive point of this patent. This patent will not be further elaborated in detail.

[0078] For those skilled in the art, modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the protection scope of this invention.

Claims

1. A digitally controlled solenoid valve, characterized in that, It includes a valve body and a stroke drive module, a clutch module, a zero-position detection mechanism, and a composite valve position sensing module mounted on the valve body, wherein: The stroke drive module is used to drive the clutch module to move linearly in a preset direction. The stroke drive module includes a drive base, a linkage unit and a stroke drive rod. The top of the stroke drive rod is provided with a zero-position detection pressure rod. The clutch module is used to grip, lock, and release the valve plate drive rod, and a valve plate for opening and closing the solenoid valve is fixedly installed at the bottom of the valve plate drive rod. The zero-position detection mechanism is installed on the drive seat and cooperates with the zero-position detection pressure rod to realize that the clutch module driven by the stroke drive module descends to the reference zero position and at the same time makes the valve plate drive rod reach the preset position inside the clutch module. The composite valve position sensing module works in conjunction with the annular pressure plate installed on the valve plate drive rod to simultaneously output two valve position signals: one feedback to the solenoid valve itself and the other feedback to external monitoring equipment, thus realizing dual feedback of the solenoid valve's on / off status.

2. The digitally controlled solenoid valve according to claim 1, characterized in that, For the travel-driven module, where: The drive base includes a motor mounting area and a drive rod movable hole. The motor mounting area is provided with a motor drive end through hole. The drive base is provided with a first bearing seat and a second bearing seat inside. The linkage unit includes a motor, a primary gear, a secondary gear assembly, and a tertiary gear. The motor is installed in the motor mounting area, and the drive end of the motor passes through the motor drive end through hole and is coaxially connected to the primary gear. The primary gear meshes with the lower gear of the secondary gear assembly, and the tertiary gear meshes with the upper gear of the secondary gear assembly. The first bearing seat is installed on the top of the tertiary gear, and the second bearing seat is installed on the bottom of the tertiary gear. The tertiary gear has an internal thread structure in the middle. The stroke drive rod has an external thread structure, the stroke drive rod passes through the middle of the three-stage gear, and the external thread structure and the internal thread structure are connected in a mating manner.

3. A digitally controlled solenoid valve according to claim 2, characterized in that, The clutch module includes a clutch mounting base and a clutch actuation unit, wherein the clutch actuation unit is built into the clutch mounting base, wherein: The clutch mounting base is equipped with a stroke drive rod on its top and a valve plate drive rod on its bottom. The valve plate drive rod is provided with a ball bearing groove on its side. The clutch actuation unit includes a coil mounting bracket, a coil, a core mounting sleeve, a fixed core, a moving core, a ball bearing mounting seat, and a clutch spring. The coil mounting bracket is built into the clutch mounting seat, and the coil is sleeved on the coil mounting bracket. The core mounting sleeve is surrounded by the coil mounting bracket. The fixed core and the moving core are both mounted on the core mounting sleeve, with the moving core positioned above the fixed core. The inner wall of the moving core has a chamfered ring, and the fixed core has an opening through which the valve plate drive rod passes. The ball bearing mounting seat is partially surrounded by the moving core, and its bottom is fixedly connected to the fixed core. Several balls are provided on the side wall of the ball bearing mounting seat. The clutch spring is installed between the top of the ball bearing mounting seat and the moving core.

4. A digitally controlled solenoid valve according to claim 3, characterized in that, The clutch mounting base is built into the solenoid valve and a number of clutch guide blocks are provided around the clutch mounting base. The clutch guide blocks cooperate with the clutch guide groove provided inside the valve body, so that the motor can stably drive the clutch mounting base to move through the stroke drive rod. The bottom of the stroke drive rod is fixedly sleeved with a moving iron core push block, and the moving iron core push block is located on the top inner side of the clutch mounting seat. The bottom of the stroke drive rod is provided with a smooth outer wall moving section, and the moving section is located above the moving iron core push block.

5. A digitally controlled solenoid valve according to claim 4, characterized in that, The zero-position detection mechanism includes a second detection body, a second detection base plate, a zero-position detection block, a photoelectric sensor, and a miniature alarm switch, wherein: The second detection body is provided with a first detection spring mounting slot, a second detection spring mounting slot, and a pressure block moving area; the pressure block moving area includes a first guide area, a second guide area, a third guide area, a photoelectric detection board moving area, and a fault detection board moving area; The second detection base plate is connected to the second detection body, and the photoelectric sensor and the miniature alarm switch are both mounted on the second detection base plate; The zero-position detection block includes a pressing contact plate, a first guide post, a second guide post, a third guide post, a photoelectric detection plate, and a fault detection plate. The bottom of the pressing contact plate has a first spring mounting end and a second spring mounting end. The first guide post, second guide post, third guide post, photoelectric detection plate, and fault detection plate are respectively installed in the first guide area, second guide area, third guide area, photoelectric detection plate moving area, and fault detection plate moving area. The photoelectric detection plate is aligned with the detection area of ​​the photoelectric sensor, and the fault detection plate is aligned with the miniature alarm switch. The zero-position detection rod is used to press down the pressing contact plate. A second detection spring is provided between the first spring mounting end and the first detection spring mounting slot, and a third detection spring is provided between the second spring mounting end and the second detection spring mounting slot.

6. A digitally controlled solenoid valve according to claim 5, characterized in that, For composite valve position sensing modules, which include a miniature position feedback detection mechanism, a valve position monitoring mechanism, and an integrated mounting mechanism, the following components are included: The miniature position feedback detection mechanism includes a first detection body, a first detection base plate, a first detection pressure plate, a first miniature switch, a first interface, a first detection spring, and a first position adjustment screw; the first detection pressure plate is provided with an integrally formed pressing section, a contact section, and a mounting section; The valve position monitoring mechanism includes a first monitoring body, a first shaft, a first monitoring pressure plate, a second micro switch, a second interface, and a first monitoring spring; the first monitoring pressure plate is provided with an integrally formed lower section, a transition section, and an upper section; The first side of the integrated installation mechanism is integrally formed with the first detection body, and the second side of the integrated installation mechanism is integrally formed with the first monitoring body. The integrated installation mechanism has a central circular area. The pressing section and the moving section face each other and are both located in the central circular area. The annular pressure plate is located above the central circular area and presses against the pressing section and the moving section simultaneously when the solenoid valve is closed.

7. A digitally controlled solenoid valve according to claim 6, characterized in that, The valve body has an input end and an output end, a cavity is provided between the input end and the output end and the cavity has a valve port, the valve plate is located above the valve port, and a valve plate composite spring is provided between the top of the valve plate and the interior of the valve body.

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