Dry-type water meter counter

Abstract

The utility model discloses a dry-type water meter counter which comprises a transparent upper cover and a lower shell with an upward opening which are buckled and sealed to form a totally-closed shell, and a counting mechanism is wrapped in the totally-closed shell; a first annular step surface is arranged on the outer circumference of the upper end of the lower shell; a second annular step surface is arranged on the inner wall of the circular barrel of the transparent upper cover; a plurality of outward radial convex blocks are arranged on the outer circumference of the lower shell below the first annular step surface; a plurality of radial through holes which are in one-to-one correspondence with the plurality of outward radial convex blocks and are used for mutually clamping are formed in the circumferential wall of the lower end of the circular barrel of the transparent upper cover; and a sealing ring which is made of a high-resilience material and is compressed to a half of the original height is arranged between the first annular step surface and the second annular step surface. The dry-type water meter counter can prevent water vapor from entering the upper cover from the joint of the upper cover and the lower shell within the shelf life of 6 years so as to ensure that the reading of the counter can be seen clearly, the insertion process is smooth and fast, and the clamping connection is firm and reliable after insertion.

Description

Technical Field

[0001] The utility model relates to the technical field of water meters, in particular to a dry-type water meter counter. Background Art

[0002] Conventional dry-type water meters consist of a transparent upper cover and an upward-facing lower housing. The upper cover and lower housing snap together to form a fully enclosed enclosure. This enclosure ideally should remain dry, sealed, and watertight during meter operation. The counting mechanism is enclosed within the fully enclosed enclosure, and the counter reading can be viewed through the transparent upper cover.

[0003] The sealing structures between the upper cover and the lower shell in the prior art generally include the following types, each of which has its own shortcomings:

[0004] 1. After the upper cover and lower shell end faces are attached, they are heat-fused together using ultrasonic welding equipment. The disadvantages of this are that they are difficult to disassemble for subsequent testing, and the weld is not airtight. Over time, for example, within the shelf life of 6 years, moisture can easily enter the upper cover through the weld gap, condensing into mist on the inner surface of the upper cover, making it difficult to read the counter reading.

[0005] 2. After the vertical ring wall of the upper cover and the vertical ring wall of the lower shell are plugged into each other, a flexible sealing ring, such as a rubber sealing ring, is placed between the two vertical ring walls. A vacuum is then drawn to create a negative pressure inside the shell. Atmospheric pressure compresses the upper cover, lower shell, and sealing ring, achieving a seal. However, the disadvantage is that the airtightness is still not ideal. Over time, for example, within the shelf life of six years, moisture can easily enter the upper cover through the gap between the sealing ring and the vertical ring wall, forming condensation on the inner surface of the upper cover, making it difficult to read the counter reading.

[0006] The above prior art needs to be improved. Utility Model Content

[0007] The technical problem to be solved by the present invention is to overcome the disadvantage of insufficient airtightness of the connection between the upper cover and the lower shell in the above-mentioned prior art, and to provide a dry water meter counter which prevents water vapor from entering the upper cover from the connection between the upper cover and the lower shell within the shelf life, such as 6 years, so as to ensure that the reading of the counter can be clearly seen, and the insertion process is smooth and quick, and the connection is firm and reliable after insertion.

[0008] The technical solution of the utility model is to provide a dry water meter counter, comprising a transparent upper cover and a lower shell with an upward opening, the transparent upper cover and the lower shell being snap-fitted and sealed to form a fully enclosed shell, and the counting mechanism being enclosed in the fully enclosed shell; a first annular step surface is provided on the outer circumference of the upper end of the lower shell, and a second annular step surface is provided on the inner wall of the circular cylinder of the transparent upper cover; a plurality of outward radial protrusions are provided on the outer circumference of the lower shell below the first annular step surface, and a plurality of radial through holes corresponding one-to-one to the plurality of outward radial protrusions and used for mutual clamping are provided on the circumferential wall of the lower end of the circular cylinder of the transparent upper cover; a sealing ring made of high-rebound material and compressed to one-third to one-half of its original height is provided between the first annular step surface and the second annular step surface.

[0009] After adopting the above structure, the utility model dry type water meter counter has the following advantages:

[0010] Due to the structure of using multiple outward radial protrusions fixed on the outer circumference of the lower shell and the radial through holes on the circumferential wall of the circular cylinder of the transparent upper cover to clamp and compress the sealing ring made of high resilience material, it can be easily disassembled and restored when it is necessary to inspect or clean the reading display part of the counter on the top surface of the lower shell.

[0011] In particular, there is a sealing ring made of high-rebound material between the first annular step surface and the second annular step surface and compressed to one-third to one-half of its original height. The design is very ingenious and reasonable. The core idea is to pre-compress the sealing ring made of high-rebound material so that it always has a tendency to rebound and reset in the later stage. The gap between the sealing ring and the first annular step surface and the second annular step surface is blocked and sealed from beginning to end. The airtightness is very ideal. As time goes by, such as within the 6-year shelf life, it is always difficult for water vapor to enter the upper cover through the gap between the sealing ring and the first annular step surface and the second annular step surface. The outer shell can be completely dry, sealed and water-isolated. Water mist will never condense on the inner surface of the transparent upper cover, and the reading of the counter can always be clearly seen from the top plate of the transparent upper cover.

[0012] Due to the preload and rebound of the sealing ring made of high-resilient material, the transparent upper cover and lower shell are increasingly locked together via the multiple outward-facing radial projections and the multiple matching radial through-holes, resulting in a secure, reliable, and strong connection between the two. In particular, multiple, for example, four through-holes defined in the circumferential wall of the lower end of the circular cylindrical body of the transparent upper cover engage with multiple, for example, four, outward-facing radial projections on the outer circumference of the lower shell, resulting in a strong, secure connection.

[0013] In addition, the inner circumferential surface of the circular cylinder of the transparent upper cover and the outer circumferential surface of the upper end of the lower shell form a natural guiding structure when plugging up and down. During assembly, it is only necessary to insert the sealing ring into the upper end of the lower shell and push it against the first annular step surface, and then put the transparent upper cover on the upper end of the lower shell and press it from top to bottom to tighten the transparent upper cover and the lower shell and compress the sealing ring. The assembly process is convenient, smooth and quick.

[0014] The shell of the dry-type water meter counter of the utility model is only a transparent circular upper cover and a lower shell, and its structure is refined, reasonable and simple, and the mold opening is convenient and the mold opening cost is relatively low.

[0015] Furthermore, the sealing ring is a highly elastic thermoplastic rubber sealing ring; its uncompressed height is 15mm, and its compressed height is 8mm when installed between the first and second annular step surfaces. This structure further ensures that, during the six-year shelf life, moisture remains impermeable, the inner surface of the transparent upper cover remains fog-free, the counter reading remains clearly visible from the top plate of the transparent upper cover, and the connection between the transparent upper cover and the lower housing is secure, reliable, and strong.

[0016] Furthermore, the radial protrusions and matching radial through-holes are evenly spaced along the circumference. The radial protrusions are rectangular, with their lateral length greater than their height, and the radial through-holes are rectangular, matching the shape and dimensions of the rectangular protrusions. This structure provides a more secure, reliable, and strong connection between the transparent upper cover and the lower shell.

[0017] Furthermore, the top surface of the rectangular protrusion is a guiding inclined surface with a lower outer surface and a higher inner surface. With the above structure, the assembly process of the transparent upper cover and the lower shell is more convenient, smooth and quick.

[0018] Furthermore, the inner diameter of the lower end of the transparent cover's circular cylindrical body, where the radial through hole is located, is larger than the inner diameter of the cylindrical section of the transparent cover's circular cylindrical body that forms the second annular step. This structure further ensures that the second annular step provides sufficient pressure area and force for the high-resilience sealing ring, while also ensuring the inherent strength of the transparent cover.

[0019] Furthermore, the outer diameter of the section of the lower shell that forms the first annular step surface is larger than the outer diameters of the middle section and lower end of the lower shell. This structure further ensures that the first annular step surface has sufficient pressure area and pressure for the sealing ring made of high-resilient material, and that the lower shell itself is strong.

[0020] Furthermore, the upper end of the inner wall of the circular cylindrical body of the transparent upper cover has a third annular stepped surface for axially limiting contact with the top surface of the counting mechanism housed in the lower housing. This structure creates a certain height of clearance between the top surface of the counting mechanism and the inner surface of the top plate of the transparent upper cover, ensuring the proper operation of the reading display of the counter mounted on the top surface of the counting mechanism while further ensuring that the pressure applied to the sealing ring by the second annular stepped surface remains within a reasonable and predetermined range.

[0021] Furthermore, two inward-facing radial projections are symmetrically arranged on the cylindrical section of the transparent upper cover that forms the second annular stepped surface. A notch is provided on the top edge of the counting mechanism to accommodate each inward-facing radial projection and to serve as a circumferential limit for the transparent upper cover and the counting mechanism. This structure not only ensures that the transparent upper cover and the counting mechanism remain in a predetermined relative circumferential position, but also ensures accurate alignment of the radial projections with the radial through-holes, further ensuring a more convenient, smooth, and rapid assembly process between the transparent upper cover and the lower housing.

[0022] Furthermore, a support is provided in the middle of the inner surface of the transparent top plate of the transparent cover, the lower end of which abuts against the middle of the top surface of the counting mechanism. This structure not only further ensures the normal operation of the reading display portion of the counter arranged on the top surface of the counting mechanism, but also relatively enhances the strength of the middle portion of the transparent cover top plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of the preferred embodiment of the dry water meter counter of the utility model. Figure 1 .

[0024] Figure 2 This is a schematic diagram of the structure of the preferred embodiment of the dry water meter counter of the utility model. Figure 2 .

[0025] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure of A in the figure.

[0026] Figure 4 yes Figure 2 Schematic diagram of the explosion structure in which the transparent upper cover, sealing ring, counting mechanism and lower shell are exploded.

[0027] Figure 5 yes Figure 2 Schematic diagram of the explosion structure in which the transparent upper cover, sealing ring and lower shell are exploded.

[0028] Figure 6 yes Figure 1 Schematic diagram of the explosion structure in which the transparent upper cover and lower shell are exploded.

[0029] Figure 7 Figure 6 Schematic diagram of the enlarged structure of B.

[0030] Figure 8 yes Figure 6 A schematic diagram of the structure of the transparent cover from a different angle.

[0031] As shown in the figure:

[0032] 1. Lower housing, 11. Bottom plate, 12. Middle section, 13. Lower end, 14. First annular step surface, 15. Outward radial projection, 151. Guide slope, 16. Upper end;

[0033] 2. Transparent upper cover, 21. Circular cylinder, 211. Inner middle section, 2111. Second annular step surface, 212. Lower end of transparent upper cover, 2121. Radial through hole, 213. Upper end of inner wall, 2131. Third annular step surface, 22. Inward radial protrusion, 23. Transparent top plate;

[0034] 3. Sealing ring;

[0035] 4. Pillar;

[0036] 5. Counting mechanism, 51. Reading display portion, 52. Top surface, 53. Notch, 54. Bevel ring. DETAILED DESCRIPTION

[0037] The following further describes the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the descriptions of these specific embodiments are intended to facilitate understanding of the present invention and do not constitute limitations on the present invention. Furthermore, the technical features involved in the various specific embodiments of the present invention described below may be combined with one another as long as they do not conflict with one another.

[0038] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 shown.

[0039] The preferred embodiment of the dry-type water meter counter of the present utility model, like the prior art, includes an impeller, a magnet and a magnetic gear, a transparent upper cover 2 and a lower shell 1 with an upward opening. The transparent upper cover 2 and the lower shell 1 are snap-fitted and sealed to form a fully enclosed shell, and the counting mechanism 5 is enclosed in the fully enclosed shell. It is not difficult to understand that the reading of the counting mechanism 5 of the counter can be seen through the transparent upper cover 2. The impeller is impulsed by the water flow in the water meter, and then the rotating magnet is driven by the impeller. The magnet drives the magnetic gear of the counting mechanism 5 in the lower shell 1 to rotate through the plastic bottom plate 11 of the lower shell 1, thereby counting. In the preferred embodiment of the dry-type water meter counter of the present utility model, the reading display part 51 of the counter is arranged on the top surface 52 of the counting mechanism 5 that can be seen from the transparent upper cover 2. The above is the prior art.

[0040] In the preferred embodiment of the dry-type water meter counter of this utility model, a first annular stepped surface 14 is formed on the outer circumference of the upper end 16 of the lower housing 1, and a second annular stepped surface 211 is formed on the inner wall of the circular cylindrical body 21 of the transparent upper cover 2. Below the first annular stepped surface 14, the outer circumference of the lower housing 1 is provided with a plurality of outward-facing radial projections 15. The circumferential wall of the lower end of the circular cylindrical body 21 of the transparent upper cover 2 is provided with a plurality of radial through-holes 2121 that correspond one-to-one with the plurality of outward-facing radial projections 15 and are used for interlocking engagement. A sealing ring 3 made of a high-resilient material and compressed to between one-third and one-half of its original height is located between the first annular stepped surface 14 and the second annular stepped surface 211.

[0041] The sealing ring 3 is preferably a highly elastic thermoplastic rubber sealing ring, such as a thermoplastic rubber O-ring, also known as a thermoplastic rubber O-ring. The uncompressed height of the sealing ring 3 is preferably 15 mm, and the compressed height of the sealing ring 3, which is installed between the first annular step surface 14 and the second annular step surface 211, is preferably 8 mm.

[0042] The radial protrusions 15 and the corresponding radial through-holes 2121 are preferably evenly spaced along the circumference. The radial protrusions 15 are preferably rectangular protrusions with a transverse length greater than their height, and the radial through-holes 2121 are preferably rectangular through-holes that match the shape of the rectangular protrusions. The radial protrusions 15 can be smaller than the radial through-holes 2121 to facilitate insertion.

[0043] The top surface of the rectangular protrusion is preferably a guide slope 151 that is lower on the outside and higher on the inside.

[0044] The inner diameter of the lower end 212 of the transparent upper cover 2 circular cylinder 21 with a radial through hole 2121 is larger than the inner diameter of the cylinder section of the transparent upper cover 2 circular cylinder 21 constituting the second annular step surface 2111, such as the inner middle section 211 of the transparent upper cover 2.

[0045] The outer diameter of the section of the lower shell 1 forming the first annular step surface 14 , i.e., the upper end 16 of the lower shell 1 , is larger than the outer diameters of the middle section 12 , i.e., the outer middle section, and the lower end, i.e., the lower end 13 of the lower shell 1 .

[0046] The upper end 213 of the inner wall of the circular cylinder 21 of the transparent upper cover 2 has a third annular step surface 2131 for axially limiting the top surface 52 of the counting mechanism 5 .

[0047] The circular cylinder 21 of the transparent upper cover 2 constitutes the cylinder section of the second annular step surface 2111, that is, the inner middle section 211, and two inward radial protrusions 22 are symmetrically provided. The top edge of the lower shell 1 is provided with notches 53, that is, two notches 53, which accommodate the respective inward radial protrusions 22 and are used for circumferential limiting of the transparent upper cover 2 and the lower shell 1.

[0048] Two inward-facing radial projections 22 are symmetrically arranged on the inner middle section 211 of the circular cylindrical body 21 of the transparent upper cover 2, which forms the second annular stepped surface 2111. A notch 53 is provided on the top edge of the counting mechanism 5 to accommodate each inward-facing radial projection 22 and to limit the circumferential position of the transparent upper cover 2 and the counting mechanism 5. Specifically, part of the notch 53 is located on the bevel ring 54 of the counting mechanism, while part of the notch 53 is located on the top surface 52 of the counting mechanism 5.

[0049] A support 4 is provided in the middle of the inner surface of the transparent top plate 23 of the transparent upper cover 2 , the lower end of which abuts against the middle of the top surface 52 of the counting mechanism 5 .

[0050] High-rebound material is a material with high elasticity. High elasticity is also called high rebound resilience. The original height of the sealing ring 3 is the height of the sealing ring 3 in the uncompressed state, i.e., in the natural state, and is also called the diameter of the O-ring or the O-ring in the uncompressed state, i.e., in the natural state. The sealing ring 3 is preferably a sealing ring 3 made of a high-elasticity thermoplastic rubber sealing ring as described above, and can also be a sealing ring 3 made of other high-rebound materials, such as a latex sealing ring, a nylon king sealing ring, etc. It is not difficult to understand that the first annular step surface 14 is an outer step surface; the second annular step surface 2111 and the third annular step surface 2131 are both inner step surfaces.

[0051] Parts, structures, quantities, etc. not marked above are not shown in the drawings, and some parts are not marked in the drawings. The drawings are for illustration only. If there is any inconsistency between the drawings and the text description or between the drawings, the text description shall prevail.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A dry-type water meter counter, comprising a transparent upper cover and a lower shell with an upward opening, wherein the transparent upper cover and the lower shell are snap-fitted and sealed to form a fully enclosed housing, and a counting mechanism is enclosed in the fully enclosed housing; characterized in that: There is a first annular step surface on the outer circumference of the upper end of the lower shell, and a second annular step surface on the inner wall of the circular cylinder of the transparent upper cover; there are multiple outward radial protrusions on the outer circumference of the lower shell below the first annular step surface, and there are multiple radial through holes on the circumferential wall of the lower end of the circular cylinder of the transparent upper cover that correspond one-to-one to the multiple outward radial protrusions and are used for mutual clamping; there is a sealing ring made of high-rebound material and compressed to one-third to one-half of its original height between the first annular step surface and the second annular step surface.

2. The dry type water meter counter according to claim 1, characterized in that: The sealing ring is a highly elastic thermoplastic rubber sealing ring; the height dimension of the sealing ring before compression is 15 mm, and the height dimension of the sealing ring after being installed between the first annular step surface and the second annular step surface and being compressed is 8 mm.

3. The dry type water meter counter according to claim 1, characterized in that: The radial protrusions and the matching radial through holes are evenly arranged along the circumference; the radial protrusions are rectangular protrusions with a transverse length dimension greater than a height dimension, and the radial through holes are rectangular through holes matching the shape of the rectangular protrusions.

4. The dry type water meter counter according to claim 3, characterized in that: The top surface of the rectangular convex block is a guiding inclined surface with a lower outer side and a higher inner side.

5. The dry type water meter counter according to claim 1, characterized in that: The inner diameter of the lower end of the transparent upper circular cylinder with a radial through hole is larger than the inner diameter of the cylinder section of the transparent upper circular cylinder forming the second annular step.

6. The dry type water meter counter according to claim 5, characterized in that: The outer diameter of the section of the lower shell that forms the first annular step surface is larger than the outer diameters of the middle section and the lower end of the lower shell.

7. The dry type water meter counter according to claim 1, characterized in that: The upper end of the inner wall of the circular cylinder of the transparent upper cover is provided with a third annular step surface for axially limiting the top surface of the counting mechanism accommodated in the lower shell body.

8. The dry type water meter counter according to claim 7, characterized in that: The transparent upper cover circular cylinder forms the second annular step surface and is symmetrically provided with two inward radial protrusions. The top edge of the counting mechanism is provided with notches for accommodating the respective inward radial protrusions and for circumferentially limiting the transparent upper cover and the counting mechanism.

9. The dry type water meter counter according to claim 7, characterized in that: A pillar with a lower end butted against the middle of the top surface of the counting mechanism is provided in the middle of the inner surface of the transparent top plate of the transparent upper cover.

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