An adjustable liquid level signal device

Abstract

The present invention discloses an adjustable liquid level signaler, comprising a housing assembly, a core assembly, and a float assembly; the housing assembly comprises a core sleeve of a cylindrical structure; the float assembly is sleeved outside the core sleeve and slides axially along the core sleeve; the core assembly comprises an adjusting screw, a reed switch circuit assembly, and a screw fastening structure; the adjusting screw is assembled in the core sleeve, one end of the adjusting screw is threadedly connected to the core sleeve, and the other end fixes the reed switch circuit assembly and forms a sliding connection with the inner wall of the core sleeve; the position of the reed switch is adjusted by adjusting the relative position of the core assembly and the housing assembly; after the adjustment is completed, the core assembly and the housing assembly are fixedly connected by the screw fastening structure. This structure can conveniently realize the continuous adjustment of the reed switch position; and provides multi-point support, thereby improving the vibration resistance of the entire liquid level signaler.

Description

Technical Field

[0001] The present invention relates to the field of liquid level measuring instruments, in particular to an adjustable liquid level signal device. Background Art

[0002] Existing adjustable liquid level signal device structure (such as Figure 1 and Figure 2 (as shown), the liquid level indicator is generally adjustable by directly adjusting the position of the reed switch inside the core assembly. To adjust the position of the reed switch on the mounting bracket, first disassemble the entire core assembly, then change the installation position of the reed switch on the mounting bracket, and then reinstall the adjusted core assembly into the housing assembly. Finally, test it. If there is an error in the liquid level indicator, it is necessary to disassemble the reed switch and repeatedly adjust it, such as Figure 2 shown.

[0003] This adjustable level indicator structure has the following disadvantages: ① It is cumbersome to operate, and repeated disassembly can introduce potential failure risks to the entire level indicator, compromising product reliability. ② The reed switch position is not continuously adjustable. ③ The mounting bracket is long and secured to the mounting base only by nuts at the end, resulting in poor vibration resistance for the entire level indicator. Summary of the Invention

[0004] In view of the above-mentioned defects of the prior art, the object of the present invention is to provide an adjustable liquid level signaler, which can conveniently adjust the position of the reed switch in the core assembly, thereby achieving the purpose of adjusting the liquid level signaler.

[0005] To achieve the above object, the present invention provides an adjustable liquid level signaler, comprising a housing assembly, a core assembly and a float assembly;

[0006] The shell assembly includes a core sleeve of a cylindrical structure, and the core sleeve is defined as a hollow base, a first cavity section and a second cavity section according to its function, and the first cavity section and the second cavity section are connected and coaxial;

[0007] The buoy assembly is sleeved on the second cavity section and slides along the axial direction of the second cavity section;

[0008] The core assembly includes an adjusting screw, a reed switch circuit assembly and a screw fastening structure; the adjusting screw is a rod-shaped structure and is assembled in the core sleeve; the adjusting screw is defined as a first end, a middle section and a second end according to its functional segments, the side of the first end is provided with an external thread, and is threadedly connected to the first cavity section, the second end is fixedly provided with the reed switch circuit assembly, and is slidingly connected to the inner wall of the second cavity section; the position of the reed switch is adjusted by adjusting the relative position of the first end and the first cavity section along the axial direction; after the adjustment is completed, the core assembly and the core sleeve are fixedly connected by the screw fastening structure.

[0009] This embodiment has the following technical effects: the threaded adjustment structure is easy to operate, the adjustment efficiency is effectively improved, and the reliability risks caused by repeated disassembly are avoided.

[0010] Furthermore, an annular groove is provided on the side of the second end portion, into which a rubber ring is embedded. The second end portion contacts the inner wall of the second cavity segment via the rubber ring, forming a sliding connection. This embodiment has the following technical effects: through the multi-point contact and the cooperation of the rubber ring, the core assembly is fixed, achieving reliable fixation between product parts and effectively improving the product's vibration resistance.

[0011] Furthermore, the adjusting screw is provided with a screw through-hole extending through the adjusting screw along its axis, and the signal line of the reed switch circuit assembly is led out into the hollow base through the screw through-hole. This embodiment has the following technical effects: (1) ensuring that the lead-out of the signal line of the reed switch circuit assembly does not interfere with the structure of the adjusting screw; and (2) exhausting air from the end of the core sleeve during installation and position adjustment of the adjusting screw, preventing a phenomenon similar to an air pump.

[0012] Furthermore, the screw fastening structure includes a tightening screw, a first wedge block and a second wedge block;

[0013] The threaded surface of the first end portion is provided with a notch arranged along the axial direction of the adjusting screw, a baffle is formed between the notch and the end surface of the first end portion, and a first through hole is provided on the baffle along the axial direction of the adjusting screw;

[0014] The cross-sections of the first wedge block and the second wedge block are both right-angled trapezoids; the first wedge block is wide at the top and narrow at the bottom, with a threaded top surface and horizontal through holes passing through both sides thereof, the through holes being waist-shaped holes; the second wedge block is narrow at the top and wide at the bottom, with horizontal screw holes passing through both sides thereof;

[0015] The inclined surfaces of the first wedge block and the second wedge block face each other and are placed in the slot, the waist-shaped hole and the screw hole face each other, and the threaded surface of the first wedge block faces the outside of the slot; the tightening screw passes through the first through hole and the waist-shaped hole and is threadedly connected to the second wedge block;

[0016] The core assembly is in an installed state or a locked state by adjusting the tightening screw;

[0017] The installation state is: the threaded surface of the first wedge block is flush with the threaded surface of the first end portion, and the threads are aligned;

[0018] The locking state is that the threaded surface of the first wedge-shaped block protrudes from the threaded surface of the first end portion and is interference-locked with the internal thread of the first cavity segment.

[0019] This embodiment has the following technical effects: by cooperating with the threaded wedge block and the locking screw, the core assembly is fixed, thereby achieving reliable fixation between product parts and effectively improving the vibration resistance of the product.

[0020] Furthermore, the shell assembly also includes a connector, a first cover plate and a second cover plate; the two ends of the shell assembly are sealed by the first cover plate and the second cover plate respectively, and a connector is provided on the side of the hollow base, and the connector is connected to the reed switch circuit assembly through a cable from the inside of the shell assembly; the end face of the hollow base is sealed by the first cover plate; the end face of the second cavity section is sealed by the second cover plate.

[0021] Furthermore, the shell assembly also includes a first limit plate and a second limit plate, which are fixed at different heights outside the second cavity segment and located on both sides of the buoy assembly to limit the movement range of the buoy assembly along the second cavity segment.

[0022] Furthermore, two end surfaces of the first limiting plate and the second limiting plate are provided with strip-shaped protrusions for reducing the contact surface between the first limiting plate, the second limiting plate and the buoy assembly.

[0023] Furthermore, two end faces of the buoy assembly are provided with annular protrusions, and the annular protrusions are used to reduce the contact area between the buoy assembly and the first limiting plate and the second limiting plate.

[0024] Furthermore, the buoy assembly includes a buoy, a magnetic column and a buoy cover plate. The magnetic column is bonded to the inside of the buoy and forms a magnetic buoy after magnetization.

[0025] Furthermore, it also includes an anti-sway pipe, which is a straight round pipe, fixedly connected to the shell assembly, and sleeved on the outside of the core sleeve and the buoy assembly to protect the core assembly and the buoy assembly.

[0026] Furthermore, the anti-swaying tube and the shell assembly are connected at multiple points, and the connection positions include: the outer wall of the first cavity section of the core sleeve, the first limiting plate and the second limiting plate.

[0027] Furthermore, the anti-swaying tube is provided with a plurality of through holes at different heights on the tube wall.

[0028] The present invention achieves the following technical effects:

[0029] (1) The threaded adjustment structure is used to achieve continuous adjustment of the reed switch position, which is easy to operate, effectively improves the adjustment efficiency, and avoids the reliability risks caused by repeated disassembly.

[0030] (2) Multiple points of support between the core assembly and the core casing improve the vibration resistance of the entire liquid level signaler. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is an embodiment of a liquid level signal device in the prior art;

[0032] Figure 2 yes Figure 1 Schematic diagram of the installation of the core assembly of the liquid level signaler;

[0033] Figure 3 It is an expanded view of the adjustable liquid level signal device of the present invention;

[0034] Figure 4 is a top view of the adjustable liquid level signaler of the present invention;

[0035] Figure 5 yes Figure 4 BB cross-section diagram;

[0036] Figure 6 It is a schematic structural diagram of the core assembly of the adjustable liquid level signaler of the present invention;

[0037] Figure 7 It is a structural schematic diagram of the core assembly in the installed state;

[0038] Figure 8 It is a structural diagram of the core assembly in a locked state.

[0039] in:

[0040] 10-housing assembly; 11-core casing; 12-connector;

[0041] 13 - first cover plate; 14 - second cover plate; 15 - first limit plate;

[0042] 16 - Second limit plate; 20 - Core assembly; 21 - Adjusting screw;

[0043] 24 - reed switch circuit assembly; 25 - screw fastening structure; 26 - rubber ring;

[0044] 30 - buoy assembly; 31 - buoy; 32 - magnetic column;

[0045] 33-buoy cover; 40-anti-sway pipe;

[0046] 111 - hollow base; 112 - first cavity section; 113 - second cavity section;

[0047] 151-strip-shaped protrusion; 161-strip-shaped protrusion;

[0048] 211 - first end; 212 - middle section; 213 - second end;

[0049] 214 - screw hole; 241 - reed switch; 242 - circuit board;

[0050] 243 - signal line; 251 - tightening screw; 252 - first wedge;

[0051] 253 - second wedge; 311 - annular protrusion; 312 - annular protrusion;

[0052] 2111-through hole; 2112-notch; 2521-through hole;

[0053] 2522-bevel; 2523-thread surface; 2531-bevel;

[0054] 2532-Screw hole. DETAILED DESCRIPTION

[0055] To further illustrate various embodiments, the present invention is provided with accompanying drawings. These drawings form part of the present disclosure and are primarily used to illustrate the embodiments and, in conjunction with the relevant description in the specification, to explain the operating principles of the embodiments. By referring to these drawings, one of ordinary skill in the art will understand other possible embodiments and the advantages of the present invention. The components in the figures are not drawn to scale, and similar reference numerals are generally used to represent similar components.

[0056] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0057] like Figures 3 to 6As shown, the present invention discloses an embodiment of an adjustable liquid level signaler, which is composed of a housing assembly 10, a core assembly 20, a float assembly 30 and an anti-sway tube 40.

[0058] The housing assembly 10 includes components such as a core sleeve 11, a connector 12, a first cover plate 13, a second cover plate 14, a first limit plate 15, and a second limit plate 16. The core sleeve 11 can be segmented into a hollow base 111, a first cavity section 112, and a second cavity section 113 according to its function. The cavities of the hollow base 111, the first cavity section 112, and the second cavity section 113 are connected, and the first cavity section 112 and the second cavity section 113 are connected and coaxial. A connector 12 is provided on the side of the hollow base 111. The connector 12 is connected to the reed switch circuit inside the core sleeve and the core assembly 20 via a wire to output a sampling signal. At one end of the core sleeve 11, that is, the end face of the hollow base 111, is sealed by the first cover plate 13; at the other end of the core sleeve, that is, the end face of the second cavity section 113, is sealed by the second cover plate 14. The core assembly 20 is inserted into the core sleeve 11 through one side of the hollow base 111 . The opening design of the first cover plate 13 facilitates the installation and position adjustment of the core assembly 20 .

[0059] In this embodiment, the inner wall of the first cavity section 112 is processed into an internal thread for threaded connection with the core assembly 20 .

[0060] In this embodiment, the buoy assembly 30 is sleeved on the second cavity section 113 and moves axially along the second cavity section 113. Specifically, in actual application, the core casing is vertically arranged, and the buoy assembly 30 moves up and down along the axial direction of the core casing (i.e., the second cavity section 113) under the action of buoyancy.

[0061] In this embodiment, a first limit plate 15 and a second limit plate 16 are fixed at different positions of the second cavity section 113. The first limit plate 15 and the second limit plate 16 are respectively arranged on both sides of the float assembly to limit the movement range of the float assembly along the second cavity section 113, that is, to provide the range of the liquid level signaler.

[0062] like Figure 6 As shown, the core assembly 20 is composed of components such as an adjusting screw 21, a reed switch circuit assembly 24 and a screw fastening structure 25.

[0063] The adjusting screw 21 provides a mounting carrier for the reed switch circuit assembly 24. The reed switch circuit assembly 24 is composed of components such as a reed switch 241, a circuit board 242 and a signal line 243.

[0064] The adjusting screw 21 is a rod-shaped structure, larger at the ends and smaller in the middle, and is assembled within the core sleeve 11. The adjusting screw 21 is functionally divided into a first end 211, a middle section 212, and a second end 213. The side of the first end 211 is provided with external threads, which threadably connect to the first cavity section 112 of the core sleeve 11. The second end 213 has a cavity for securely mounting the reed switch circuit assembly 24, and the second end 213 forms a sliding connection with the inner wall of the second cavity section 113 of the core sleeve 11. A screw through-hole 214 is provided in the adjusting screw 21, extending along its axis (i.e., from the end surface of the first end 211 to the end surface of the second end 213). The signal line 243 of the reed switch circuit assembly 24 is routed through the screw through-hole 214 into the cavity of the hollow base 111 and connected to the connector 12. This ensures that the signal line of the reed switch circuit assembly 24 does not interfere with the structure of the adjusting screw.

[0065] Specifically, the length of the external thread of the first end 211 is smaller than the length of the internal thread of the first cavity section 112 ; the length of the adjusting screw is smaller than the total length of the first cavity section 112 and the second cavity section 113 , thereby providing adjustment space for the adjusting screw 21 .

[0066] Specifically, an annular groove is provided on the side of the second end portion 213, and a rubber ring 26 (made of rubber, silicone, etc.) is disposed in the groove. The second end portion 213 contacts the inner wall of the second cavity section 113 via the rubber ring 26, forming a sliding connection. Through the above-described means, multi-point contact is established between the core assembly 20 and the core sleeve 11.

[0067] Through multi-point contact, the shaking of the core assembly 20 during use can be greatly reduced, so that the entire liquid level signaler has good anti-vibration performance.

[0068] In this embodiment, the screw hole 214 also serves as an air vent. The adjusting screw 21 is assembled within the core sleeve 11. The use of the rubber ring 26 forms a closed cavity at the end of the core sleeve 11. This hole 214 allows air to escape from the end of the core sleeve 11 during installation and position adjustment of the adjusting screw 21, preventing a phenomenon similar to an air pump that could affect the installation and position adjustment of the adjusting screw 21.

[0069] Fixing of the adjusting screw:

[0070] After the position of the core assembly 20 is adjusted, the adjusting screw 21 needs to be fixed.

[0071] In this embodiment, the screw fastening structure 25 includes a tightening screw 251 , a first wedge block 252 , and a second wedge block 253 .

[0072] The cross sections of the first wedge block 252 and the second wedge block 253 are both right-angled trapezoids.

[0073] The first wedge block 252 is wide at the top and narrow at the bottom, with a threaded surface 2523 on the top surface and horizontal through holes 2521 running through both sides thereof. The through holes 2521 are waist-shaped holes, so that there is a radial margin of activity inside the first wedge block 252, which facilitates the axial movement of the first wedge block 252.

[0074] The second wedge-shaped block 253 is narrow at the top and wide at the bottom, and is provided with horizontal screw holes 2532 running through both sides thereof.

[0075] In order to implement the fixing operation of the screw fastening structure 25, a slot 2112 is provided on the side of the first end 211 along the axial direction of the adjusting screw; thereby a baffle is formed between the slot 2112 and the end face of the first end 211; a through hole 2111 is provided on the baffle along the axial direction of the adjusting screw.

[0076] The first wedge block 252 and the second wedge block 253 are combined and placed into the slot 2112, so that the inclined surface 2522 of the first wedge block 252 and the inclined surface 2531 of the second wedge block 253 are opposite to each other, and the through hole 2521 and the screw hole 2532 are opposite to each other, the threaded surface 2523 of the first wedge block 252 faces the outside of the slot 2112, and the end face of the first wedge block 252 fits with the baffle, so that the threads of the threaded surface 2523 of the first wedge block 252 and the threaded surface of the first end portion 211 of the adjusting screw 21 are aligned; the tightening screw 251 is threadedly connected through the through hole 2111, the through hole 2521 and the screw hole 2532.

[0077] The core assembly 20 is adjusted to the installation state before installation:

[0078] Adjust the tension screw 251, push or loosen the first wedge block 252 through the second wedge block 253, and adjust the radial and axial positions of the first wedge block 252 so that the thread surface 2523 of the first wedge block 252 and the thread surface of the first end portion 211 of the adjusting screw 21 are flush and the threads are aligned, as shown in FIG. Figure 7 At this point, the core assembly 20 can be installed into the core sleeve 11 smoothly.

[0079] After adjusting the position of the reed switch, the core assembly 20 needs to be adjusted to the locked state:

[0080] When the core assembly 20 is adjusted to a suitable position, the tightening screw 251 is tightened to move the second wedge block 253 along the axial direction of the adjusting screw and push the first wedge block 252 through the inclined surface, so that the threaded surface 2523 of the first wedge block 252 protrudes from the threaded surface of the first end portion 211 and is locked with the internal thread of the first cavity section 112 of the core sleeve 11 by interference. Figure 8 As shown, the purpose of eliminating thread clearance and preventing loosening is achieved.

[0081] In this embodiment, the buoy assembly 30 is composed of a buoy 31, a magnetic column 32 and a buoy cover plate 33. The buoy 31 is made of a low-density, high-temperature-resistant and oil-resistant graphene composite material. The magnetic column 32 is die-cast from an aluminum-nickel-cobalt material and has a very low temperature coefficient. The magnetic column is bonded to the inside of the buoy 31 and forms a magnetic buoy after magnetization.

[0082] In this embodiment, to prevent the first and second limiting plates 15, 16, and the float assembly 30 from sticking together in liquid (primarily oil), strip-shaped protrusions 151 and 161 are provided on the end surfaces of the first and second limiting plates 15, 16 facing the float assembly 30, thereby reducing the contact surface between the float assembly 30 and the first and second limiting plates 15, 16. In this embodiment, the strip-shaped protrusions are provided on both surfaces of the first and second limiting plates 15, 16.

[0083] In this embodiment, to prevent adhesion between the first and second stop plates 15, 16, and the buoy assembly 30 in liquid (primarily oil), annular protrusions 311 and 312 are provided on the upper and lower end surfaces of the buoy assembly 30. The upper annular protrusion 312 is provided on the upper surface of the buoy 31; the lower annular protrusion 311 is formed when the buoy assembly 30 is installed, raising the edge of the buoy 31 above the buoy cover plate 33 (by fitting the buoy cover plate 33 into the groove of the buoy 31).

[0084] In this embodiment, the anti-sway tube 40 is a straight, circular tube fixed to the core sleeve 11, providing protection for the float assembly 30, the core sleeve 11, and the core assembly 20. Its function is to reduce the impact on the float when the liquid level sways, thereby improving its stability. The anti-sway tube 40 has through-holes at different heights on its wall to ensure that the liquid level inside and outside the anti-sway tube 40 is balanced when the liquid level indicator is in use.

[0085] In this embodiment, the anti-sway tube 40 and the housing assembly 10 are fixed by multiple connection points. Different positions of the anti-sway tube 40 are respectively fixed to the outer wall of the first cavity section 112 of the core sleeve 11, the first limit plate 15, and the second limit plate 16 by screws.

[0086] In summary, the adjustable liquid level signal device provided in this embodiment has the following advantages:

[0087] (1) The threaded adjustment structure is easy to operate, effectively improves the adjustment efficiency, and avoids the reliability risks caused by repeated disassembly.

[0088] (2) Multiple points of support between the core assembly and the core casing improve the vibration resistance of the entire liquid level signaler.

[0089] (3) The threaded wedge block and the locking screw are used to achieve reliable fixation of the core assembly and the core sleeve, effectively improving the vibration resistance of the liquid level signaler.

[0090] Although the present invention has been particularly shown and described in conjunction with preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made to the present invention without departing from the spirit and scope of the invention as defined in the appended claims, and all such changes are within the scope of protection of the present invention.

Claims

1. An adjustable liquid level signal device, characterized in that: Includes a shell assembly, a core assembly, a buoy assembly and an anti-sway pipe; The shell assembly includes a core sleeve of a cylindrical structure, and the core sleeve is defined as a hollow base, a first cavity section and a second cavity section according to its function, and the first cavity section and the second cavity section are connected and coaxial; The buoy assembly is sleeved on the second cavity section and slides axially along the second cavity section; The core assembly includes an adjusting screw, a reed switch circuit assembly and a screw fastening structure; the adjusting screw is a rod-shaped structure, which is assembled in the core sleeve; the adjusting screw is divided into a first end, a middle section and a second end according to its function; the side of the first end is provided with an external thread, which is threadedly connected to the first cavity section; the second end is fixedly provided with the reed switch circuit assembly and is slidably connected to the inner wall of the second cavity section; the position of the reed switch is adjusted by adjusting the relative position of the first end and the first cavity section in the axial direction; after the adjustment is completed, the core assembly and the core sleeve are fixedly connected by the screw fastening structure; The screw fastening structure comprises a tightening screw, a first wedge block and a second wedge block; The threaded surface of the first end portion is provided with a notch arranged along the axial direction of the adjusting screw, a baffle is formed between the notch and the end surface of the first end portion, and a first through hole is provided on the baffle along the axial direction of the adjusting screw; The cross-sections of the first wedge block and the second wedge block are both right-angled trapezoids; the first wedge block is wide at the top and narrow at the bottom, with a threaded top surface and horizontal through holes passing through both sides thereof, the through holes being waist-shaped holes; the second wedge block is narrow at the top and wide at the bottom, with horizontal screw holes passing through both sides thereof; The inclined surfaces of the first wedge block and the second wedge block face each other and are placed in the slot, the waist-shaped hole and the screw hole face each other, and the threaded surface of the first wedge block faces the outside of the slot; the tightening screw passes through the first through hole and the waist-shaped hole and is threadedly connected to the second wedge block; The core assembly is in an installed state or a locked state by adjusting the tightening screw; The installation state is: the threaded surface of the first wedge block is flush with the threaded surface of the first end portion, and the threads are aligned; The locking state is: the threaded surface of the first wedge-shaped block protrudes from the threaded surface of the first end portion and is interference-locked with the internal thread of the first cavity segment; The anti-sway pipe is a straight round pipe, fixedly connected to the shell assembly, and sleeved on the outside of the core sleeve and the buoy assembly.

2. The adjustable liquid level signal device according to claim 1, characterized in that: An annular groove is provided on the side surface of the second end portion, and a rubber ring is embedded in the annular groove. The second end portion contacts the inner wall of the second cavity segment through the rubber ring to form a sliding connection.

3. The adjustable liquid level signal device according to claim 1, characterized in that: The adjusting screw is provided with a screw through hole which passes through the adjusting screw along its axis, and the signal line of the reed switch circuit assembly is led out into the hollow base through the screw through hole.

4. The adjustable liquid level signal device according to claim 1, characterized in that: The shell assembly also includes a connector, a first cover plate and a second cover plate; the two ends of the shell assembly are sealed by the first cover plate and the second cover plate respectively, and a connector is provided on the side of the hollow base, and the connector is connected to the reed switch circuit assembly through a cable from the inside of the shell assembly; the end face of the hollow base is sealed by the first cover plate; the end face of the second cavity section is sealed by the second cover plate.

5. The adjustable liquid level signal device according to claim 1, characterized in that: The housing assembly further includes a first limiting plate and a second limiting plate, which are fixed at different heights outside the second cavity section and located on both sides of the buoy assembly.

6. The adjustable liquid level signal device according to claim 5, characterized in that: Both end surfaces of the first limiting plate and the second limiting plate are provided with strip-shaped protrusions.

7. The adjustable liquid level signal device according to claim 5, characterized in that: Two end surfaces of the buoy assembly are provided with annular protrusions.

8. The adjustable liquid level signal device according to claim 1, characterized in that: The buoy assembly includes a buoy, a magnetic column and a buoy cover plate. The magnetic column is bonded to the inside of the buoy and forms a magnetic buoy after magnetization.

9. The adjustable liquid level signal device according to claim 1, characterized in that: The anti-swaying tube and the shell assembly are connected at multiple points, and the connection positions include: the outer wall of the first cavity section of the core sleeve, the first limiting plate and the second limiting plate.

10. The adjustable liquid level signal device according to claim 1, characterized in that: The anti-swaying pipe is provided with a plurality of through holes at different heights on the pipe wall.

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