Liquid level float switch and submersible pump

Abstract

The invention relates to the technical field of float switches, in particular to a liquid level float switch and a submersible pump. The liquid level adjusting mechanism is in sliding connection with the frame body component, a first positioning structure is arranged between the frame body component and the liquid level adjusting mechanism, and the first positioning structure is used for limiting the liquid level adjusting mechanism at a certain height; the connecting rod mechanism comprises a guide part and a driving part which are connected with each other; the first switch is matched with the driving part; the floating ball is located below the liquid level adjusting mechanism, and the floating ball is movably connected with the guide part; the lower stroke limiting piece is arranged on the guide part and located below the floating ball; wherein a mechanical triggering mechanism is arranged between the floating ball and the liquid level adjusting mechanism, and when the liquid level rises, the floating ball and the guide part are locked; and when the liquid level drops, the floating ball slides downwards, the floating ball is separated from the mechanical triggering mechanism, and the floating ball and the guide part are unlocked.

Description

Technical Field

[0001] The present disclosure relates to the technical field of float switches, and in particular to a liquid level float switch and a submersible pump. Background Art

[0002] A liquid level float switch is a commonly used device for detecting and controlling liquid levels. Currently, the water pump industry mostly uses a liquid level float switch to control the start and stop of water pumps. The principle of a liquid level float switch is that the float rises and falls according to the rise and fall of the water level, thereby controlling the action of the microswitch inside the float switch, thereby controlling the start and stop of the water pump. Ultimately, it satisfies the user's need to ensure that the water pump can operate automatically when no one is watching.

[0003] Chinese patent No. 2021222980676 discloses a dual-float liquid level controller, which includes a main body and a boom connected to the main body at one end. The bottom of the boom is provided with a first float, and the boom is provided with a second float that can be adjusted and positioned between the first float and the main body. The patent adjusts the distance between the first and second floats to accommodate different liquid level requirements. The above patent manually loosens or tightens the adjustment bolt to adjust the position of the first and second floats. If the positions of the first and second floats need to be adjusted frequently, the adjustment efficiency will be seriously affected. Summary of the Invention

[0004] In view of the deficiencies or problems existing in the prior art, the present disclosure provides a liquid level float switch with high adjustment accuracy and strong versatility.

[0005] The technical solution adopted by the present disclosure to solve the above technical problems is: a liquid level float switch, comprising:

[0006] frame components;

[0007] The liquid level regulating mechanism is slidably connected to the frame member, and a first positioning structure is provided between the frame member and the liquid level regulating mechanism, and the first positioning structure is used to limit the liquid level regulating mechanism to a certain height;

[0008] A connecting rod mechanism, comprising a guide portion and a driving portion connected to each other;

[0009] a first switch cooperating with the driving unit;

[0010] A float ball is located below the liquid level adjustment mechanism and is movably connected to the guide portion;

[0011] A lower stroke limiter is provided on the guide portion and is located below the float;

[0012] In which, a mechanical trigger mechanism is provided between the float and the liquid level adjustment mechanism. When the liquid level rises, the float contacts the mechanical trigger mechanism and cooperates with the liquid level adjustment mechanism to trigger the mechanical trigger mechanism. The float is locked with the guide part, and the float drives the guide part to move upward, and the driving part triggers the first switch; when the liquid level drops, the float slides down, the float disengages from the mechanical trigger mechanism, the float is unlocked from the guide part, the float slides down until it contacts the lower stroke limiter, the float drives the guide part to move downward, and the first switch is reset.

[0013] In some embodiments, the mechanical trigger mechanism includes a rolling body, a recessed section provided on the guide portion, and a touch rod provided on the float. The liquid level adjustment mechanism is provided with a hollow structure. The rolling body is provided in the hollow structure. The recessed section is provided toward the rolling body. The liquid level adjustment mechanism is provided with an avoidance groove for allowing the touch rod to pass through. The touch rod enters the hollow structure of the liquid level adjustment mechanism. As the touch rod moves upward, the rolling body contacts the touch rod and the recessed section respectively, and the float is locked with the guide portion.

[0014] When the feeler rod rises with the float, it pushes the rolling body. After the rolling body is stuck in the recessed section, it contacts the recessed section and the feeler rod respectively and is squeezed. The rolling body is constrained by the recessed section and is difficult to retreat. The radial extrusion force of the rolling body is used to achieve mechanical self-locking, so that the guide part and the rolling body stuck in the recessed section move up with the float.

[0015] As a preferred embodiment, the recessed section includes several first arc-shaped recesses continuously arranged along the length direction of the guide portion, the contour of the first arc-shaped recess is adapted to the size of the rolling body, the top of the touch rod is provided with an inclined surface, the inclined surface is arranged toward the rolling body, and the lower part of the inclined surface is provided with a second arc-shaped recess adapted to the size of the rolling body. When one side of the rolling body is in contact with the first arc-shaped recess and the other side is in contact with the second arc-shaped recess, the float is locked with the guide portion.

[0016] The continuous arrangement of the first arc-shaped concave forms multiple discrete locking points on the guide part to adapt to starting liquid levels of different heights; the setting of the inclined surface on the top of the feeler rod can convert the vertical movement of the feeler rod into radial displacement of the rolling body, so that the rolling body can be smoothly locked into the predetermined position; the setting of the first arc-shaped concave and the second arc-shaped concave allows them to form a wrapping contact with the rolling body, preventing the rolling body from accidentally slipping after the float is locked with the guide part, thereby improving the stability of the structure and the reliability of operation.

[0017] In some embodiments, the mechanical trigger mechanism includes an external tooth portion arranged on the guide portion, a sliding sleeve, and a contact cylinder arranged on the float. The sliding sleeve is arranged on the outside of the guide portion, and the sliding sleeve is arranged between the liquid level adjustment mechanism and the float. The liquid level adjustment mechanism is provided with a first limiting structure, and the sliding sleeve is provided with a second limiting structure. The inner circumferential wall of the sliding sleeve is provided with an internal tooth portion. After the contact cylinder contacts the sliding sleeve, it drives the sliding sleeve to move upward, and the sliding sleeve contacts the liquid level adjustment mechanism. The external tooth portion and the internal tooth portion are interlocked under the action of the first limiting structure and the second limiting structure, and the float is locked with the guide portion.

[0018] After the contact cylinder and the sliding sleeve come into contact, the sliding sleeve is driven to move upward. When the sliding sleeve moves up to the position of the liquid level adjustment mechanism, the first limiting structure and the second limiting structure cooperate with each other to make the outer teeth and the inner teeth interlock, so that the guide part, the float and the sliding sleeve move synchronously, that is, the float and the guide part are locked.

[0019] As a preferred embodiment, the liquid level adjustment mechanism includes a toggle block and a sliding block, a hollow structure and an avoidance groove are provided on the sliding block, a sleeve is provided between the sliding block and the float, and a first limiting structure is provided on the sliding block; the toggle block includes a toggle part and a connecting part, a first protrusion is provided on one side of the sliding block, a receiving groove is provided on the first protrusion, and the connecting part is at least partially located in the receiving groove, and a limiting hole is also provided on the first protrusion, and the limiting hole is located on the side of the receiving groove, and a limiting protrusion is provided at the corresponding position of the connecting part, and the limiting protrusion cooperates with the limiting hole to limit the connecting part at least partially in the receiving groove.

[0020] The height of the toggle block and the sliding block can be quickly adjusted through the toggle part, thereby realizing the adjustment of the starting liquid level. The entire adjustment process can be completed without the aid of other tools, which simplifies the adjustment process. The toggle block slides in the receiving groove through its connecting part, forming a linkage with the sliding block. The cooperation between the limiting protrusion and the limiting hole is similar to a "snap-in" structure, which ensures the stability of the connection between the connecting part and the sliding block. This cooperation method can be quickly disassembled and assembled, and is convenient for maintenance and replacement of parts.

[0021] As a preferred embodiment, two second protrusions are provided at the bottom of the sliding block, and the two second protrusions are symmetrically arranged on both sides of the bottom of the sliding block. The first limiting structure is an arc-shaped guide surface arranged at the bottom of the two second protrusions; the second limiting structure is a positioning block arranged on both sides of the sliding sleeve, and the end of the positioning block is spherical, and the arc-shaped guide surface cooperates with the positioning block to limit the circumference of the sliding sleeve.

[0022] The cooperation between the arc-shaped guide surface and the spherical end allows the sleeve to make slight adaptive adjustments during axial movement; when the sleeve rises to the sliding block position, the positioning block falls into the predetermined position under the guidance of the arc-shaped guide surface, so that the sliding block and the sleeve form a circumferential limit, and the sleeve cannot rotate around the axis of the guide part. At this time, the outer tooth part and the inner tooth part are interlocked, so that the guide part moves synchronously with the float and the sleeve.

[0023] As a preferred embodiment, a plurality of touch protrusions are provided on the top of the contact cylinder, a plurality of guide slopes are provided on the bottom of the sliding sleeve, and bosses are formed at the connection of adjacent guide slopes. The bosses cooperate with the touch protrusions to limit the circumferential position of the float.

[0024] The float ball contacts the protrusion and cooperates with the boss to ensure that the float ball can stably drive the sliding sleeve to move upward.

[0025] As a preferred embodiment, the toggle portion includes a substrate and a toggle plate, the connecting portion and the toggle plate are respectively located on both sides of the substrate, a first gap is provided between the substrate and the first protrusion, the frame component includes a first frame and a ridge provided on the first frame, the thickness of the ridge is adapted to the width of the first gap, the ridge is located in the first gap, and the sliding block is located on the inner side of the ridge; the first positioning structure is provided on the first frame, and the first positioning structure is located on the outer side of the ridge.

[0026] The thickness of the ridge is precisely matched with the first gap to form a sliding guide channel to prevent the toggle block from shaking during the adjustment process.

[0027] As a preferred embodiment, the first positioning structure is a plurality of first slots arranged at intervals, and the plurality of first slots are provided on the movement trajectory of the toggle block. The first slots cooperate with the toggle plate to limit the toggle block to a certain height; the convex ridge is respectively provided with an upper stop portion and a lower stop portion along its axial direction, and the toggle block slides along the convex ridge between the upper stop portion and the lower stop portion; the first positioning structure is located between the upper stop portion and the lower stop portion.

[0028] Multiple spaced-apart first slots provide multiple discrete positioning points, allowing the toggle block to be accurately positioned at different heights; the setting of the upper and lower gear parts limits the maximum sliding range of the toggle block, ensuring that the user can adjust the gear within a safe range.

[0029] As a preferred embodiment, a slide groove is provided on the first frame, a slide seat is provided at the top of the guide portion, the driving portion is provided below the slide seat, the slide seat is slidably provided in the slide groove, and a baffle for axially limiting the slide seat is provided below the slide groove.

[0030] When the slide moves downward, it contacts the baffle, thereby preventing it from moving further downward.

[0031] As a preferred embodiment, a guide block is provided on the slide, and a guide groove is provided on the side wall of the slide. The guide block is slidably provided in the guide groove, and the guide block cooperates with the guide groove to limit the circumferential position of the slide.

[0032] The restraint mechanism formed by the cooperation of the guide block and the guide groove can effectively prevent the slide from moving circumferentially in the slide groove, enhance the anti-interference ability of the entire structure, and ensure that the guide part can only move in the axial direction when lifting.

[0033] As a preferred embodiment, the sliding block is provided with a first through hole, and the lower end of the guide portion passes through the first through hole so that the sliding block is sleeved on the outside of the guide portion.

[0034] This arrangement allows the sliding block to slide freely along the length of the guide part. When the float rises or falls to a certain position as the liquid level rises or falls, the guide part will move accordingly. Since the sliding block can slide on the guide part, the sliding block will not restrict the movement of the guide part. In addition, the sliding block is sleeved on the outside of the guide part to provide certain support and guidance for the guide part, preventing the guide part from shaking or deflecting during the lifting process.

[0035] As a preferred embodiment, a second positioning structure for limiting the liquid level adjustment mechanism at a certain height is also provided on the first frame. The second positioning structure is located between the upper gear portion and the lower gear portion, and the second positioning structure is provided above the first positioning structure. The second positioning structure is a second card slot. When the dial plate is located in the second positioning structure, the sliding block contacts the driving portion, and the first switch is in the on state.

[0036] When the dial plate is located in the second positioning structure, the first switch is in a normally open state. In an emergency, the first switch can be directly turned on by pushing the dial plate directly to the second slot without the need for step-by-step adjustment.

[0037] As a preferred embodiment, the driving unit triggers the first switch through a magnetic mechanism, the magnetic mechanism includes a base, the first switch is arranged on the base, the base is provided with a bracket, the bracket is provided with a magnetic component, and the end of the driving unit is provided with a first magnetic part, the magnetic component interacts with the first magnetic part so that the bracket touches the button of the first switch.

[0038] The present application also provides a submersible pump, comprising a housing, on which the above-mentioned liquid level float switch is provided.

[0039] Compared with existing products, the technical solution of this application can flexibly adjust the liquid level height, allowing users to adjust the position of the liquid level adjustment mechanism according to the actual required liquid level height, making the float switch suitable for various working conditions and improving versatility;

[0040] The application can flexibly adjust the required water level by adjusting the height position of the liquid level adjustment mechanism, which is simple and convenient to operate;

[0041] The setting of the first positioning structure ensures that the liquid level adjustment mechanism can be stably limited at the set height, avoiding the deviation of the adjustment height caused by factors such as external vibration, thereby ensuring the accuracy of liquid level control;

[0042] The mechanical trigger mechanism locks and unlocks the float and the guide part under the joint action of the float and the liquid level adjustment mechanism. The structure is simple while ensuring the stability and sensitivity of the float switch triggering. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The present application will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present application. In addition, unless otherwise specified, the drawings are merely schematic representations of the composition or structure of the described objects and may contain exaggerated representations, and the drawings are not necessarily drawn to scale.

[0044] Figure 1 This is one of the structural diagrams of a liquid level float switch disclosed in the present invention;

[0045] Figure 2 It is one of the structural diagrams of the connecting rod mechanism disclosed in the present invention;

[0046] Figure 3 is a cross-sectional view of a frame member of the present disclosure;

[0047] Figure 4 This is one of the cross-sectional views of a liquid level float switch disclosed herein;

[0048] Figure 5 is a cross-sectional view of the float disclosed herein;

[0049] Figure 6 This is one of the structural diagrams of the sliding block disclosed in the present invention;

[0050] Figure 7 It is a structural schematic diagram of the toggle block disclosed in the present invention;

[0051] Figure 8 This is one of the structural diagrams of the connection between the toggle member and the sliding block disclosed in the present invention;

[0052] Figure 9 This is the second structural diagram of the connection between the toggle member and the sliding block disclosed in the present invention;

[0053] Figure 10 This is the second structural diagram of the sliding block disclosed in the present invention;

[0054] Figure 11 This is the third structural diagram of the sliding block disclosed in the present invention;

[0055] Figure 12 This is the fourth structural diagram of the sliding block disclosed in the present invention;

[0056] Figure 13This is the second structural diagram of a liquid level float switch disclosed in the present invention;

[0057] Figure 14 This is the second cross-sectional view of a liquid level float switch disclosed in the present invention;

[0058] Figure 15 It is a structural schematic diagram of the connection between the liquid level regulating mechanism and the connecting rod mechanism disclosed in the present invention;

[0059] Figure 16 It is a structural schematic diagram of the float disclosed in the present invention;

[0060] Figure 17 This is one of the structural diagrams of the sliding sleeve disclosed in the present invention;

[0061] Figure 18 This is the second structural diagram of the sliding sleeve disclosed in the present invention;

[0062] Figure 19 is a cross-sectional view of the sliding sleeve of the present disclosure;

[0063] Figure 20 is a schematic structural diagram of the magnetic mechanism disclosed herein;

[0064] Figure 21 is a schematic structural diagram of the disclosed stent;

[0065] Figure 22 It is a structural schematic diagram of a submersible pump disclosed in the present invention.

[0066] Description of reference numerals:

[0067] 1. Housing; 3. Liquid level adjustment mechanism; 31. Sliding block; 310. First protrusion; 3101. Accommodating groove; 3102. Limiting hole; 311. Second protrusion; 3111. Arc-shaped guide surface; 312. Slideway; 313. Stop block; 32. Toggle block; 320. Toggle portion; 3201. Base plate; 3202. Toggle plate; 321. Connecting portion; 3211. Limiting protrusion; 33. First gap; 11. Guide portion; 110. First arc-shaped concave portion; 111. Beveled tooth segment; 21. Float; 210. Contact rod; 2101. Second arc-shaped concave portion; 211. Contact cylinder; 2111. Contact protrusion; 41. Driving unit; 51. Magnetic mechanism; 510. Base; 511. Bracket; 5111. Touch panel; 5112. First connecting plate; 5113. Second connecting plate; 5114. Third connecting plate; 61. Slide; 610. Guide block; 71. Frame component; 710. First frame; 7101. First slot; 7102. Second slot; 7103. Baffle; 7104. Slide; 7105. Guide slot; 100. First switch; 200. Lower travel limiter; 300. Rolling element; 400. Sleeve; 4001. Positioning block; 4002. Guide ramp; 4003. Hook. DETAILED DESCRIPTION

[0068] In order to enable those skilled in the art to better understand the technical solutions of the present disclosure, the present disclosure is described in detail, clearly, and completely in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are not intended to limit the present disclosure.

[0069] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0070] Please see Figure 1 and Figure 13As shown, at present, the submersible pumps on the market often have some inconveniences when adjusting the starting water level. The present application provides a liquid level float switch, which is particularly suitable for submersible pumps, which includes a frame member 71, a first switch 100 and a liquid level adjustment mechanism 3 slidably connected to the frame member 71, a first positioning structure is provided between the frame member 71 and the liquid level adjustment mechanism 3, and the first positioning structure is used to limit the liquid level adjustment mechanism 3 to a certain height; it also includes a connecting rod mechanism, a float 21 and a lower stroke limiter 200, the connecting rod mechanism includes a guide portion 11 and a driving portion 41 that are interconnected, the first switch 100 is provided on one side of the driving portion 41, the float 21 is slidably connected to the guide portion 11, and is located at the liquid level adjustment mechanism Below the liquid level regulating mechanism 3, the lower stroke limiter 200 is provided on the guide portion 11 and is located below the float 21; wherein, a mechanical trigger mechanism is provided between the float 21 and the liquid level regulating mechanism 3. When the liquid level rises, the float 21 contacts the mechanical trigger mechanism and cooperates with the liquid level regulating mechanism 3 to trigger the mechanical trigger mechanism. The float 21 is locked with the guide portion 11, and the float 21 drives the guide portion 11 to move upward, and the driving portion 41 triggers the first switch 100; when the liquid level drops, the float 21 slides down, the float 21 disengages from the mechanical trigger mechanism, the float 21 is unlocked from the guide portion 11, and the float 21 slides down until it contacts the lower stroke limiter 200. The float 21 drives the guide portion 11 to move downward, and the first switch 100 is reset. The technical solution provided by the present application can flexibly adjust the liquid level height of the starting water level of the submersible pump, allowing the user to adjust the position of the liquid level adjustment mechanism 3 according to the actual required liquid level height, so that the float switch and the submersible pump used therein are suitable for a variety of working scenarios, thereby improving versatility; the liquid level adjustment mechanism 3 of the present application is simple and convenient to operate, and is especially suitable for submersible pumps that need to frequently adjust the starting water level; the mechanical trigger mechanism of the present application realizes the locking and unlocking of the float 21 and the guide part 11 under the joint action of the float 21 and the liquid level adjustment mechanism 3, and has a simple structure while ensuring the stability and sensitivity of the float switch triggering.

[0071] It should be noted that the function of the lower stroke limiter 200 of the present application is to limit the float 21, so that when the float 21 slides downward to the position of the lower stroke limiter 200, it can drive the guide part 11 to move downward together. Therefore, the lower stroke limiter 200 of the present application includes but is not limited to a bolt crossing the guide part 11 or a protrusion structure integrally formed with the guide part 11 or a protrusion structure detachably connected to the guide part 11. The present application does not limit the specific structure of the lower stroke limiter 200.

[0072] Please also refer to Figures 6-10As shown, further, the liquid level adjustment mechanism 3 includes a toggle block 32 and a sliding block 31, the toggle block 32 includes an integrally formed toggle portion 320 and a connecting portion 321, a first protrusion 310 is provided on one side of the sliding block 31, a receiving groove 3101 is provided on the first protrusion 310, the connecting portion 321 is at least partially located in the receiving groove 3101, a limiting hole 3102 is also provided on the first protrusion 310, the limiting hole 3102 is located on the side of the receiving groove 3101, a limiting protrusion 3211 is provided at the corresponding position of the connecting portion 321, the limiting protrusion 3211 cooperates with the limiting hole 3102 to limit the connecting portion 321 at least partially in the receiving groove 3101. By pushing the toggle part 320 up and down (or toggling or sliding), the height adjustment of the toggle block 32 and the sliding block 31 can be quickly achieved, thereby achieving the adjustment of the starting liquid level. The entire adjustment process can be completed without the aid of other tools, which simplifies the adjustment process; the toggle block 32 slides in the accommodating groove 3101 through its connecting part 321, forming a linkage with the sliding block 31, driving the sliding block 31 to move together; the cooperation of the limiting protrusion 3211 and the limiting hole 3102 is similar to a "snap-in" structure, which ensures the stability of the connection between the connecting part 321 and the sliding block 31. In addition, this cooperation method can be quickly disassembled and assembled, which is convenient for maintenance and replacement of parts.

[0073] Specifically, the toggle portion 320 includes a base plate 3201 and a toggle plate 3202. The connecting portion 321 and the toggle plate 3202 are located on either side of the base plate 3201, respectively. A first gap 33 is defined between the base plate 3201 and the first protrusion 310. It should be noted that the horizontal dimension of the connecting portion 321 is greater than the depth of the receiving groove 3101. When the connecting portion 321 enters the receiving groove 3101, the first gap 33 is naturally formed between the base plate 3201 and the first protrusion 310. The frame member 71 includes a first frame 710 and a ridge provided on the first frame 710. The thickness of the ridge matches the width of the first gap 33. The ridge is located within the first gap 33, the sliding block 31 is located on the inside of the ridge, and the toggle portion 320 is located on the outside of the ridge, facilitating user adjustment of the toggle block 32. When the liquid level float switch is used in a submersible pump, the outer side of the ridge is exposed to the external environment, while the inner side of the ridge is located in the submersible pump housing 1. The toggle portion 320 needs to be exposed outside the pump body to facilitate user adjustment, so the toggle portion 320 is located outside the ridge. To further facilitate adjustment, the dial plate 3202 is configured as a plate perpendicular to the sliding direction of the toggle block 32. The first positioning structure is provided on the first frame 710, and the first positioning structure is located outside the ridge. The thickness of the ridge precisely matches the first gap 33, forming a sliding guide channel to prevent the toggle block 32 from shaking during adjustment and ensure the stability of the toggle block 32 and the sliding block 31 during the sliding process.

[0074] like Figure 3 and Figure 14As shown, preferably, the first positioning structure is a plurality of first slots 7101 arranged at intervals. The plurality of first slots 7101 are arranged on the motion trajectory of the toggle block 32. The first slots 7101 cooperate with the dial plate 3202 to limit the toggle block 32 to a certain height. The plurality of first slots 7101 arranged at intervals provide multiple discrete positioning points, enabling the toggle block 32 to be quickly and accurately positioned at different heights. When the dial plate 3202 engages the first slots 7101, a "click" sound or a change in resistance is generated, providing tactile feedback to the user. Of course, the first positioning structure can also be a damping positioning structure.

[0075] Specifically, the ridge is provided with an upper stop portion and a lower stop portion along its axial direction, and the toggle block 32 slides along the ridge between the upper and lower stop portions; a first positioning structure is located between the upper and lower stop portions. Specifically, the upper and lower stop portions include, but are not limited to, block-shaped, plate-shaped, or strip-shaped structures, as long as they can serve as limiters. The arrangement of the upper and lower stop portions ensures that the ridge provides two limit points for the toggle block 32 at either end of the axial direction, limiting the maximum sliding range of the toggle block 32 and ensuring that the user can adjust the gear position within a safe range.

[0076] A slide groove 7104 is provided on the first frame 710. A slide 61 is provided at the top of the guide portion 11. The drive portion 41 is provided below the slide 61. The slide 61 slides in the slide groove 7104. A baffle 7103 is provided below the slide groove 7104 for axially limiting the slide 61. The slide groove 7104 provides a sliding space for the slide 61 to slide up and down, and the slide groove 7104 also serves as a guide to a certain extent. During the downward movement of the slide 61, it contacts the baffle 7103, which prevents it from moving further downward. The provision of the baffle 7103 limits the maximum downward sliding distance of the guide portion 11. Only when the guide portion 11 slides up and down within this range can the drive portion 41 effectively trigger the first switch 100.

[0077] Please see Figure 2 、 Figure 4 、 Figure 14 and Figure 15 As shown, to ensure the stability of the guide portion 11 during sliding, a guide block 610 is provided on the slide 61. The sidewall of the slide groove 7104 is provided with a guide groove 7105 along the sliding direction of the guide portion 11. The guide block 610 is slidably disposed in the guide groove 7105. The guide block 610 and the guide groove 7105 cooperate to circumferentially limit the slide 61. The restraint mechanism formed by the guide block 610 and the guide groove 7105 effectively prevents the slide 61 from circumferentially moving within the slide groove 7104, enhancing the anti-interference ability of the entire structure, thereby ensuring that the guide portion 11 can only move axially during lifting and lowering.

[0078] The sliding block 31 is provided with a first through-hole, through which the lower end of the guide portion 11 passes, allowing the sliding block 31 to be sleeved onto the outside of the guide portion 11. This arrangement allows the sliding block 31 to slide freely along the length of the guide portion 11 (the direction of movement of the guide portion 11). When the float 21 rises or falls to a certain position as the liquid level rises or falls, the guide portion 11 will move up and down accordingly. Since the sliding block 31 can slide on the guide portion 11, it will not restrict the movement of the guide portion 11. In addition, the sliding block 31 sleeved onto the outside of the guide portion 11 provides a certain degree of support and guidance for the guide portion 11, preventing the guide portion 11 from shaking or shifting during the raising and lowering process.

[0079] like Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As shown, in one embodiment of the present disclosure, the mechanical trigger mechanism includes a rolling body 300, a recessed section provided on the guide portion 11, and a touch rod 210 provided on the float 21. The sliding block 31 is provided with a hollow structure, the rolling body 300 is provided in the hollow structure, the recessed section is provided toward the rolling body 300, and the bottom of the sliding block 31 is provided with an avoidance groove allowing the touch rod 210 to pass through. As the float 21 slides upward, the touch rod 210 enters the hollow structure of the sliding block 31, and the touch rod 210 continues to move upward with the float 21. The rolling body 300 contacts the touch rod 210 and the recessed section respectively, and the float 21 is locked with the guide portion 11. As the float 21 rises, the contact rod 210 pushes the rolling element 300. After the rolling element 300 is caught in the recessed section, it contacts the recessed section and the contact rod 210, squeezing the rolling element 300. Constrained by the recessed section, the rolling element 300 is unable to retract. The radial squeezing force of the rolling element 300 creates a mechanical self-locking mechanism, allowing the guide portion 11 and the rolling element 300, caught in the recessed section, to move upward along with the float 21. It is understood that during the upward movement of the guide portion 11 and the rolling element 300 along with the float 21, because the paddle 3202 of the toggle block 32 is stuck in the first slot 7101, the toggle block 32 and the sliding block 31 do not move upward along with the guide portion 11. Both remain essentially stationary. As the float 21, guide portion 11, and rolling element 300 move upward, the contact rod 210 or the rolling element 300 within the hollow structure gradually contacts the inner wall at the top of the sliding block 31, causing the guide portion 11 to cease moving upward. It should be noted that before the feeler rod 210 or the rolling element 300 in the hollow structure touches the inner wall of the top of the sliding block 31 or when it touches the inner wall of the top of the sliding block 31 (before or immediately after the guide portion 11 stops moving upward), the drive unit 41 triggers the first switch 100, and the submersible pump starts operating. The rolling element 300 in this application is a ball, roller, or needle roller.

[0080] Specifically, the recessed section includes several first arc-shaped recesses 110 continuously arranged along the length direction of the guide portion 11. The contour of the first arc-shaped recess 110 is adapted to the size of the rolling body 300. The top of the touch rod 210 is provided with an inclined surface, which is arranged toward the rolling body 300. The lower part of the inclined surface is provided with a second arc-shaped recess 2101 adapted to the size of the rolling body 300. When one side of the rolling body 300 is in contact with the first arc-shaped recess 110 and the other side is in contact with the second arc-shaped recess 2101, the float 21 is locked with the guide portion 11. The continuous arrangement of the first arcuate recesses 110 creates multiple discrete locking points on the guide portion 11 to accommodate different starting liquid levels. The inclined surface at the top of the feeler rod 210 converts the vertical movement of the feeler rod 210 into radial displacement of the rolling element 300, allowing the rolling element 300 to smoothly engage the predetermined position. The first arcuate recess 110 and the second arcuate recess 2101 form a wraparound contact with the rolling element 300, preventing the rolling element 300 from accidentally slipping out after the float 21 is locked with the guide portion 11, thereby improving the stability of the structure and operational reliability. It is understood that when the position of the toggle block 32 and the sliding block 31 are fixed, the rolling element 300 and the guide portion 11 are locked as they move upward with the float 21 (after the float 21 is locked with the guide portion 11), and the rolling element 300 is locked and cannot slide from one first arcuate recess 110 to the other.

[0081] like Figures 10-16 and Figure 19 As shown, in another embodiment of the present disclosure, the mechanical trigger mechanism includes an outer tooth portion arranged on the guide portion 11, a sleeve 400 and a contact 211 arranged on the float 21. The sleeve 400 is sleeved on the outside of the guide portion 11, and the sleeve 400 is arranged between the sliding block 31 and the float 21. A first limiting structure is provided on the sliding block 31, and a second limiting structure is provided on the sleeve 400. The inner circumferential wall of the sleeve 400 is provided with an inner tooth portion. After the contact 211 contacts the sleeve 400, it drives the sleeve 400 to move upward, and the sleeve 400 contacts the sliding block 31. The outer tooth portion and the inner tooth portion are interlocked under the action of the first limiting structure and the second limiting structure, and the float 21 is locked with the guide portion 11. After the contact cylinder 211 and the sleeve 400 come into contact, the sleeve 400 is driven to move upward. When the sleeve 400 moves up to the position of the sliding block 31, the first limiting structure and the second limiting structure cooperate with each other to make the outer teeth and the inner teeth interlock, so that the guide part 11 and the float 21 and the sleeve 400 move synchronously, that is, the float 21 and the guide part 11 are locked.

[0082] Specifically, the external teeth are two beveled tooth segments 111 disposed on the outer circumferential wall of the guide portion 11. These two beveled tooth segments 111 are located on two side surfaces of the guide portion 11, and are composed of a plurality of beveled teeth arranged continuously along the axial direction of the guide portion 11. The internal teeth are two hooks 4003 disposed on the inner circumferential wall of the sleeve 400. These two hooks 4003 are positioned opposite each other on the inner circumferential wall of the sleeve 400. When the first and second retaining structures interact, the hooks 4003 engage with the beveled tooth segments 111, locking the sleeve 400 and the guide portion 11. The guide portion 11 then moves upward along with the sleeve 400, resulting in synchronous movement of the guide portion 11, the float 21, and the sleeve 400, locking the float 21 with the guide portion 11.

[0083] Two second protrusions 311 are provided at the bottom of the sliding block 31, and the two second protrusions 311 are symmetrically arranged on both sides of the bottom of the sliding block 31. The first limiting structure is an arc-shaped guide surface 3111 arranged at the bottom of the two second protrusions 311; the second limiting structure is a positioning block 4001 arranged on both sides of the sliding sleeve 400, and the end of the positioning block 4001 is spherical. The arc-shaped guide surface 3111 cooperates with the positioning block 4001 to limit the circumferential position of the sliding sleeve 400 so that the outer tooth portion and the inner tooth portion are stably engaged together. The cooperation between the arc-shaped guide surface 3111 and the spherical end allows the sleeve 400 to perform slight adaptive adjustments during axial movement; when the sleeve 400 rises to the position of the sliding block 31, the positioning block 4001 falls into a predetermined position under the guidance of the arc-shaped guide surface 3111, so that the sliding block 31 and the sleeve 400 form a circumferential limit, so that the inner teeth on the sleeve 400 are maintained at a specific angle, so that the inner teeth and the outer teeth are engaged, and the sleeve 400 cannot rotate around the axis of the guide part 11. At this time, the guide part 11 moves synchronously with the float 21 and the sleeve 400.

[0084] Please continue to see Figure 11 、 Figure 12 、 Figure 17 and Figure 18As shown, it should be noted that the two curved guide surfaces 3111 each extend upwardly along the axial direction of the guide portion 11, with slideways 312 extending therefrom. One slideway 312 is located on the outer side of the sliding block 31, and the other slideway 312 is located on the inner wall of the sliding block 31. Under the action of the float 21, the sleeve 400 rises until it contacts the sliding block 31. Then, the sleeve 400 spirals upward, and the positioning block 4001 moves from the lowest point to the highest point of the curved guide surface 3111, and then enters the slideways 312. As the positioning block 4001 moves from the lowest point to the highest point of the curved guide surface 3111, the inner and outer teeth gradually engage and lock, stably locking the sleeve 400 and the guide portion 11. Then, under the action of the float 21, the positioning block 4001 continues to rise along the slideways 312. It is understood that as the positioning block 4001 rises along the slideways 312, the guide portion 11 and the positioning block 4001 rise together. A stop block 313 is provided at the top of the sliding block 31. The positioning block 4001 rises along the slideway 312 until it contacts the stop block 313, and the sliding sleeve 400 and the guide portion 11 stop moving upward. It should be noted that before the positioning block 4001 contacts the stop block 313 or when the positioning block 4001 contacts the stop block 313 (before or immediately after the guide portion 11 stops moving upward), the driving unit 41 triggers the first switch 100, and the submersible pump begins operating.

[0085] Preferably, the top of the contact cylinder 211 is provided with a plurality of actuating protrusions 2111, and the bottom of the sliding sleeve 400 is provided with a plurality of guiding slopes 4002. Bosses are formed at the junctions of adjacent guiding slopes 4002. The bosses cooperate with the actuating protrusions 2111 to circumferentially limit the position of the float 21. The interaction between the actuating protrusions 2111 and the bosses ensures that the float 21 can stably drive the sliding sleeve 400 upward.

[0086] In particular, the first frame 710 is also provided with a second positioning structure for limiting the liquid level adjustment mechanism 3 to a certain height. The second positioning structure is located between the upper and lower gear portions, and the second positioning structure is provided above the first positioning structure. Specifically, the second positioning structure is a second slot 7102. When the dial plate 3202 is located in the second positioning structure, the top end of the sliding block 31 contacts the driving portion 41, and the first switch 100 is in the on state. In addition, when the dial plate 3202 is in the second positioning structure, the upper end of the connecting portion 321 contacts the upper gear portion. At this time, the toggle block 32 can no longer be adjusted upward. It can be understood that the first positioning structure can be regarded as the adjustment gear section for the starting water level, and the desired starting water level height is obtained by axially moving the position of the toggle block 32 up and down. The first positioning structure can be regarded as the normally open gear of the submersible pump, so that it can be used when there are special needs. When the dial plate 3202 is located in the second positioning structure, the first switch 100 is in a normally open state. In an emergency, the first switch 100 can be directly turned on by pushing the dial plate 3202 directly to the second slot 7102 without step-by-step adjustment.

[0087] Please see Figure 20 and Figure 21As shown, the driving unit 41 triggers the first switch 100 via a magnetic mechanism 51. The magnetic mechanism 51 includes a base 510. The first switch 100 is disposed on the base 510. The base 510 is provided with a bracket 511. The bracket 511 is provided with a magnetic assembly. The end (free end) of the driving unit 41 is provided with a first magnetic member. The magnetic assembly interacts with the first magnetic member to cause the bracket 511 to trigger the button of the first switch 100. Specifically, the bracket 511 is hinged to the base 510 and includes a touch plate 5111 and a connecting plate assembly. The connecting plate assembly includes a first connecting plate 5112, a second connecting plate 5113, and a third connecting plate 5114. The first connecting plate 5112 and the second connecting plate 5113 are provided parallel to and opposite to each other on the third connecting plate 5114. The touch plate 5111 is connected to the third connecting plate 5114. The first switch 100 is provided on one side of the touch plate 5111, and the button of the first switch 100 is provided near the touch plate 5111. The first connecting plate 5112 is provided with a first mounting seat, and the second connecting plate 5113 is provided with a second mounting seat. The magnetic assembly includes a second magnetic member and a third magnetic member, with the second magnetic member being provided in the first mounting seat and the third magnetic member being provided in the second mounting seat. As the driving portion 41 moves up and down along the guide portion 11, the free end of the driving portion 41 is always located between the first connecting plate 5112 and the second connecting plate 5113. This ensures that after the driving portion 41 rises to a certain height, the first magnetic member can interact with the second magnetic member and the third magnetic member, respectively. More specifically, when the driving portion 41 rises to a certain height, the free end of the driving portion 41 is substantially located horizontally between the first connecting plate 5112 and the second connecting plate 5113. The second magnetic member and the first magnetic member attract each other, while the third magnetic member and the first magnetic member repel each other, thereby causing the bracket 511 to rotate about the hinge axis. The rotation of the bracket 511 drives the touch plate 5111 to press the button of the first switch 100, activating the float switch. The float 21 slides down until it contacts the lower stroke limiter 200, and the float 21 drives the guide part 11 to move downward. As the drive part 41 moves downward, the force between the first magnetic part and the magnetic assembly gradually disappears. The button of the first switch 100 is reset under the action of its own elastic force, and the bracket 511 rotates to its original position (reset), and the float switch stops working. It should be noted that the first magnetic part, the second magnetic part, and the third magnetic part are all magnets. Magnets have two magnetic poles, namely the south pole (S pole) and the north pole (N pole). Like poles repel and opposite poles attract, which is the basic magnetism of magnets. The fact that "the second magnetic part and the first magnetic part attract each other, and the third magnetic part and the first magnetic part repel each other" involves the setting of the magnetic poles of the magnets, which is common knowledge for those skilled in the art and will not be elaborated here.

[0088] Please see Figure 22 As shown, the present disclosure further provides a submersible pump, comprising a housing 1 , on which the liquid level float switch described in the above embodiment is provided.

[0089] The present application has been described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is intended only to help understand the present application and its core concepts. It should be noted that, without departing from the principles of the present application, a number of improvements and modifications may be made to the present application by a person skilled in the art, and such improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A liquid level float switch, characterized in that: include: Frame member (71); The liquid level regulating mechanism (3) is slidably connected to the frame member (71), and a first positioning structure is provided between the frame member (71) and the liquid level regulating mechanism (3), wherein the first positioning structure is used to limit the liquid level regulating mechanism (3) to a certain height; A connecting rod mechanism comprising a guide portion (11) and a driving portion (41) connected to each other; a first switch (100) cooperating with the driving unit (41); A float (21) is located below the liquid level regulating mechanism (3), and the float (21) is movably connected to the guide portion (11); A lower stroke limiter (200) is provided on the guide portion (11) and is located below the float (21); A mechanical trigger mechanism is provided between the float (21) and the liquid level regulating mechanism (3); when the liquid level rises, the float (21) contacts the mechanical trigger mechanism and cooperates with the liquid level regulating mechanism (3) to trigger the mechanical trigger mechanism; the float (21) is locked with the guide portion (11); the float (21) drives the guide portion (11) to move upward together, and the driving portion (41) triggers the first switch (100); When the liquid level drops, the float (21) slides down, the float (21) is disengaged from the mechanical trigger mechanism, the float (21) is unlocked from the guide portion (11), the float (21) slides down until it contacts the lower stroke limiter (200), the float (21) drives the guide portion (11) to move downward together, and the first switch (100) is reset.

2. The liquid level float switch according to claim 1, characterized in that: The mechanical trigger mechanism comprises a rolling body (300), a recessed section provided on a guide portion (11), and a touch rod (210) provided on a float (21); a liquid level regulating mechanism (3) is provided with a hollow structure; the rolling body (300) is provided in the hollow structure; the recessed section is provided toward the rolling body (300); the liquid level regulating mechanism (3) is provided with an avoidance groove for allowing the touch rod (210) to pass through; the touch rod (210) enters the hollow structure of the liquid level regulating mechanism (3); as the touch rod (210) moves upward, the rolling body (300) contacts the touch rod (210) and the recessed section respectively, and the float (21) is locked with the guide portion (11).

3. The liquid level float switch according to claim 1, characterized in that: The mechanical trigger mechanism comprises an outer tooth portion arranged on the guide portion (11), a sliding sleeve (400), and a contact cylinder (211) arranged on the float (21); the sliding sleeve (400) is sleeved on the outside of the guide portion (11); the sliding sleeve (400) is arranged between the liquid level regulating mechanism (3) and the float (21); a first limiting structure is provided on the liquid level regulating mechanism (3); a second limiting structure is provided on the sliding sleeve (400); an inner tooth portion is provided on the inner peripheral wall of the sliding sleeve (400); after the contact cylinder (211) contacts the sliding sleeve (400), the sliding sleeve (400) is driven to move upward; the sliding sleeve (400) contacts the liquid level regulating mechanism (3); the outer tooth portion and the inner tooth portion are interlocked under the action of the first limiting structure and the second limiting structure; and the float (21) is locked with the guide portion (11).

4. The liquid level float switch according to claim 2 or 3, characterized in that: The liquid level regulating mechanism (3) comprises a toggle block (32) and a sliding block (31); a hollow structure and an avoidance groove are provided on the sliding block (31); a sliding sleeve (400) is provided between the sliding block (31) and the float (21); and a first position-limiting structure is provided on the sliding block (31); the toggle block (32) comprises a toggle portion (320) and a connecting portion (321); a first protrusion (310) is provided on one side of the sliding block (311); and a receiving groove ( 3101), the connecting portion (321) is at least partially located in the accommodating groove (3101), a limiting hole (3102) is further provided on the first protrusion (310), the limiting hole (3102) is located on the side of the accommodating groove (3101), and a limiting protrusion (3211) is provided at a corresponding position of the connecting portion (321), and the limiting protrusion (3211) cooperates with the limiting hole (3102) to limit the connecting portion (321) at least partially in the accommodating groove (3101).

5. The liquid level float switch according to claim 2, characterized in that: The recessed section comprises a plurality of first arc-shaped recesses (110) continuously arranged along the length direction of the guide portion (11), the contour of the first arc-shaped recesses (110) being adapted to the size of the rolling body (300), the top of the touch rod (210) being provided with an inclined surface, the inclined surface being arranged toward the rolling body (300), the lower portion of the inclined surface being provided with a second arc-shaped recess (2101) being adapted to the size of the rolling body (300), and when one side of the rolling body (300) is in contact with the first arc-shaped recess (110) and the other side is in contact with the second arc-shaped recess (2101), the float (21) is locked with the guide portion (11).

6. The liquid level float switch according to claim 3, characterized in that: The top of the contact cylinder (211) is provided with a plurality of touch protrusions (2111), the bottom of the sliding sleeve (400) is provided with a plurality of guide inclined surfaces (4002), and the connection between adjacent guide inclined surfaces (4002) forms a boss, which cooperates with the touch protrusions (2111) to limit the circumferential position of the float (21).

7. The liquid level float switch according to claim 4, characterized in that: The sliding block (31) is provided with a first through hole, and the lower end of the guide portion (11) passes through the first through hole so that the sliding block (31) is sleeved on the outside of the guide portion (11).

8. The liquid level float switch according to claim 4, characterized in that: Two second protrusions (311) are provided at the bottom of the sliding block (31), and the two second protrusions (311) are symmetrically arranged on both sides of the bottom of the sliding block (31), and the first limiting structure is an arc-shaped guide surface (3111) provided at the bottom of the two second protrusions (311); the second limiting structure is a positioning block (4001) provided on both sides of the sliding sleeve (400), and the end of the positioning block (4001) is spherical, and the arc-shaped guide surface (3111) cooperates with the positioning block (4001) to limit the circumferential position of the sliding sleeve (400).

9. The liquid level float switch according to claim 4, characterized in that: The toggle portion (320) comprises a base plate (3201) and a toggle plate (3202); the connecting portion (321) and the toggle plate (3202) are respectively located on both sides of the base plate (3201); a first gap (33) is provided between the base plate (3201) and the first protrusion (310); the frame member (71) comprises a first frame (710) and a ridge provided on the first frame (710); the thickness of the ridge is adapted to the width of the first gap (33); the ridge is located in the first gap (33); and the sliding block (31) is located on the inner side of the ridge; a first positioning structure is provided on the first frame (710), and the first positioning structure is located on the outer side of the ridge.

10. The liquid level float switch according to claim 9, characterized in that: The first positioning structure is a plurality of first slots (7101) arranged at intervals, and the plurality of first slots (7101) are arranged on the movement trajectory of the toggle block (32), and the first slots (7101) cooperate with the toggle plate (3202) to limit the toggle block (32) at a certain height; the convex ridge is respectively provided with an upper stop portion and a lower stop portion along its axial direction, and the toggle block (32) slides along the convex ridge between the upper stop portion and the lower stop portion; the first positioning structure is located between the upper stop portion and the lower stop portion.

11. The liquid level float switch according to claim 10, characterized in that: The first frame (710) is also provided with a second positioning structure for limiting the liquid level adjustment mechanism (3) at a certain height. The second positioning structure is located between the upper gear portion and the lower gear portion, and the second positioning structure is provided above the first positioning structure. The second positioning structure is a second slot (7102). When the dial plate (3202) is located in the second positioning structure, the sliding block (31) contacts the driving portion (41), and the first switch (100) is in an on state.

12. The liquid level float switch according to claim 9, characterized in that: A slide groove (7104) is provided on the first frame (710), a slide seat (61) is provided at the top end of the guide portion (11), the driving portion (41) is provided below the slide seat (61), the slide seat (61) is slidably provided in the slide groove (7104), and a baffle (7103) for axially limiting the slide seat (61) is provided below the slide groove (7104).

13. The liquid level float switch according to claim 12, characterized in that: A guide block (610) is provided on the slide (61), and a guide groove (7105) is provided on the side wall of the slide groove (7104). The guide block (610) is slidably provided in the guide groove (7105), and the guide block (610) cooperates with the guide groove (7105) to limit the circumferential position of the slide (61).

14. A submersible pump, characterized in that: The invention comprises a housing (1), on which a liquid level float switch according to any one of claims 1 to 13 is arranged.

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