Water meter with anti-freezing structure

Abstract

The invention discloses a water meter with an anti-freezing structure, and relates to the technical field of water meters. The water meter comprises a water meter shell, a decompression chamber is arranged at the bottom of the water meter shell, and the lower end of the decompression chamber is connected with a bottom cover; the bottom cover is connected with a decompression column, a decompression hole is formed in the lower end of the decompression column, and a pressure discharging hole communicated with the decompression hole is formed in the side wall of the decompression column. A pressure-bearing plate is movably inserted into the pressure-reducing column in a penetrating mode, first sealing pieces are arranged between the pressure-bearing plate and the pressure-reducing chamber and between the pressure-bearing plate and the pressure-reducing column, the pressure-bearing plate is supported upwards through the compression spring, the pressure-bearing plate is used for blocking the pressure discharge hole, and when the pressure in the water meter shell is increased and the pressure-bearing plate is squeezed downwards, water in the water meter shell is discharged through the pressure discharge hole and the pressure relief hole. And pressure relief in the water meter shell is achieved. The pressure-bearing plate is downwards squeezed and pushed by increasing the icing pressure in the water meter, so that the pressure in the water meter shell is relieved through the pressure discharge hole and the pressure relief hole, and the problems that an existing water meter is anti-freezing through heating, the overall structure is complex, and the use cost is high are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of water meters, and particularly relates to a water meter with an anti-freezing structure. Background Art

[0002] Most water meters are installed outdoors exposed. When encountering low temperatures, if corresponding heat preservation and anti-freezing measures are not adopted, the water meter is prone to cracking.

[0003] For example, Chinese Utility Model CN222528710U discloses an anti-freezing water meter. By the combined use of a bottom shell, an electric heating box, a filtering member, and a circulating member, the heated water source is introduced into the electric heating box, and the hot water source is circulated at the bottom of the water meter body and in the electric heating box by the circulating member. The temperature of the water source in the water meter body is increased by the heat of the hot water source. When the temperature of the water source in the water meter body is always higher than zero degree Celsius, the water source in the water meter body will not freeze, achieving the anti-freezing effect on the water meter body.

[0004] However, in the prior art, the anti-freezing water meter realizes the anti-freezing effect by heating the water body, so that the water source in the water meter is always in a warm state. The overall structure is relatively complex, the volume is large, the adaptability to the installation space is poor, and at the same time, it needs to be powered on and heated by a heating member, thus increasing the additional energy consumption and resulting in a higher use cost. Summary of the Invention

[0005] The purpose of the present invention is to provide a water meter with an anti-freezing structure. When the ice formation pressure inside the water meter increases and pushes the bearing plate downward, the pressure relief of the inside of the water meter housing is realized through the pressure relief holes and the pressure discharge holes, solving the problems of complex overall structure and high use cost of the existing water meters by heating for anti-freezing.

[0006] To solve the above technical problems, the present invention is realized through the following technical solutions:

[0007] The present invention is a water meter with an anti-freezing structure, including a water meter housing. A pressure reduction chamber is arranged at the bottom of the water meter housing, and a bottom cover is connected to the lower end of the pressure reduction chamber; the bottom cover is fixedly connected with a pressure reduction column. A pressure relief hole is opened at the lower end of the pressure reduction column, and a pressure discharge hole communicated with the pressure relief hole is opened on the side wall; a bearing plate is movably inserted through the pressure reduction column, and a compression spring is sleeved thereon. First sealing members are installed between the bearing plate and the pressure reduction chamber and the pressure reduction column respectively. The bearing plate is supported upward by the compression spring, and the pressure discharge hole is blocked by the bearing plate. When the pressure inside the water meter housing increases and the bearing plate is pushed downward, the water body inside the water meter housing is discharged through the pressure discharge hole and the pressure relief hole, realizing the pressure relief of the inside of the water meter housing.

[0008] As a preferred technical solution of the present invention, the diameter of the upper end of the pressure reducing column gradually increases to form an inverted frustum structure; a conical hole adapted to the upper end of the pressure reducing column is provided on the bearing plate.

[0009] As a preferred technical solution of the present invention, the pressure discharge hole is opened on the conical surface of the inverted frustum structure at the upper end of the pressure reducing column, a convex edge adapted to the pressure reducing column is provided at the edge of the lower port of the conical hole, and a sealing ring is installed between the convex edge and the pressure reducing column.

[0010] As a preferred technical solution of the present invention, a threaded hole is provided on the upper surface of the bottom cover, and the lower end of the pressure reducing column is threadedly connected to the threaded hole.

[0011] As a preferred technical solution of the present invention, the bottom cover is fixedly connected with a sealing plate through a plurality of connecting columns, a through hole adapted to the pressure reducing column is provided on the sealing plate, and second sealing members are installed between the sealing plate and the inner wall of the pressure reducing chamber, and between the through hole and the pressure reducing column.

[0012] As a preferred technical solution of the present invention, the connecting column and the sealing plate are of an integral structure, a receiving hole extending into the interior of the connecting column is provided on the upper surface of the sealing plate, and an airbag is installed in the receiving hole.

[0013] As a preferred technical solution of the present invention, a plurality of the connecting columns are arranged in a circumferential array relative to the pressure reducing column.

[0014] As a preferred technical solution of the present invention, a support column corresponding to the receiving hole one by one is fixedly connected to the lower surface of the bearing plate, and a support plate tightly attached to the upper end of the airbag is fixedly connected to the lower end of the support column.

[0015] As a preferred technical solution of the present invention, an adjustment hole communicating with the receiving hole is provided on the bottom cover, a plug column is threadedly connected in the adjustment hole, and by adjusting the axial position of the plug column, the vertical position of the airbag is adjusted.

[0016] As a preferred technical solution of the present invention, the lower end of the compression spring abuts against the upper surface of the sealing plate.

[0017] The present invention has the following beneficial effects:

[0018] In the present invention, by providing a pressure reducing chamber, connecting a pressure reducing column through a bottom cover, the pressure reducing column is movably inserted through a bearing plate, and the bearing plate is supported upward by a compression spring. When the internal ice formation pressure of the water meter housing increases and the bearing plate is squeezed downward, the water in the water meter housing is discharged through the pressure discharge hole and the pressure relief hole, so as to realize pressure relief inside the water meter housing and achieve the effect of preventing freezing damage. Compared with preventing freezing by heating, the overall structure of the present application is simple, without additional energy consumption, and effectively improves the overall practicability and convenience of use.

[0019] Of course, it is not necessary for any product implementing the present invention to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for describing the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 Structural schematic diagram of a water meter with an anti-freezing structure according to the present invention;

[0022] Figure 2 is Figure 1 Structural schematic diagram from a bottom view;

[0023] Figure 3 Half-sectional view of the anti-freezing water meter;

[0024] Figure 4 is Figure 3 Structural schematic diagram during pressure relief in ;

[0025] Figure 5 Structural schematic diagram of the bottom cover, pressure reducing column and bearing plate;

[0026] Figure 6 is Figure 5 front view of ;

[0027] Figure 7 Exploded view of the bottom cover, pressure reducing column and bearing plate;

[0028] Figure 8 Structural schematic diagram of the bottom cover and the sealing plate;

[0029] Figure 9 Structural schematic diagram of the pressure reducing column;

[0030] Figure 10 Structural schematic diagram of the bearing plate;

[0031] In the drawings, the list of components represented by each reference numeral is as follows:

[0032] 1 - water meter housing, 2 - bottom cover, 3 - pressure reducing column, 4 - bearing plate, 5 - airbag, 6 - plug column, 101 - pressure reducing chamber, 201 - threaded hole, 202 - connecting column, 203 - sealing plate, 204 - through hole, 205 - second seal, 206 - receiving hole, 301 - pressure relief hole, 302 - pressure discharge hole, 303 - compression spring, 401 - first seal, 402 - tapered hole, 403 - convex edge, 404 - sealing ring, 405 - support column, 406 - support plate. Detailed implementation mode

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0034] In the description of the present invention, it should be understood that the terms "open hole", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery", etc. indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0035] Embodiment 1

[0036] Please refer to Figure 1 and 2 As shown, the present invention is a water meter with an anti-freezing structure, including a water meter housing 1. A pressure reduction chamber 101 is provided at the bottom of the water meter housing 1. The pressure reduction chamber 101 is in a cylindrical structure, and a bottom cover 2 is connected to the lower end of the pressure reduction chamber 101 by a thread.

[0037] As Figure 3 、 7 and 9 show, a pressure reduction column 3 is fixedly connected to the bottom cover 2. A pressure relief hole 301 is opened at the lower end of the pressure reduction column 3, and a pressure discharge hole 302 communicating with the pressure relief hole 301 is opened on the side wall. Among them, a threaded hole 201 is opened on the upper surface of the bottom cover 2, and the lower end of the pressure reduction column 3 is threadedly connected to the threaded hole 201. The pressure reduction column 3 is located at the center of the bottom cover 2.

[0038] A bearing plate 4 is movably inserted through the pressure reduction column 3, and a compression spring 303 is sleeved. First seals 401 are installed between the bearing plate 4 and the pressure reduction chamber 101 and the pressure reduction column 3.

[0039] Specifically, the diameter of the upper end of the pressure reduction column 3 gradually increases, forming an inverted frustum structure. The pressure discharge hole 302 is opened on the conical surface of the inverted frustum structure at the upper end of the pressure reduction column 3. The bearing plate 4 is provided with a conical hole 402 adapted to the upper end of the pressure reduction column 3. A convex edge 403 adapted to the pressure reduction column 3 is provided at the edge of the lower port of the conical hole 402, and a sealing ring 404 is installed between the convex edge 403 and the pressure reduction column 3. For example, a sealing groove for installing the sealing ring 404 is opened on the inner wall of the convex edge 403. Annular grooves are opened on the inner wall of the conical hole 402 of the bearing plate 4 and the circumferential surface of the bearing plate 4. The first seals 401 are installed in the annular grooves.

[0040] The lower end of the compression spring 303 abuts against the bottom cover 2, and the compression spring 303 supports the pressure-bearing plate 4 upward. Since the upper end of the pressure-reducing column 3 is in an inverted frustum structure, when the compression spring 303 pushes the pressure-bearing plate 4 upward, the tapered hole 402 of the pressure-bearing plate 4 contacts the tapered surface of the inverted frustum structure of the pressure-reducing column 3 more closely, so as to block the pressure-discharging hole 302 by using the pressure-bearing plate 4. In addition, a stepped surface is provided at the upper end of the inner wall of the pressure-reducing chamber 101, and the upper surface of the pressure-bearing plate 4 is closely attached to the stepped surface, which is beneficial to improving the overall sealing performance.

[0041] When the external temperature drops and the water pipe and the water meter housing 1 freeze, the pressure inside the water meter housing 1 gradually increases. When the pressure increases to a certain extent, the pressure-bearing plate 4 will be squeezed downward, causing the compression spring 303 to compress.

[0042] As Figure 4 shown, the pressure-bearing plate 4 moves downward and loses the blockage of the pressure-discharging hole 302. At this time, the convex edge 403 and the pressure-reducing column 3 are still in a sealed state. Therefore, under the action of the pressure inside the water meter housing 1, the water inside the water meter housing 1 is discharged from the water meter housing 1 through the pressure-discharging hole 302 and the pressure-relieving hole 301, realizing the pressure relief inside the water meter housing 1, avoiding the damage to the water meter components caused by freezing, and achieving the anti-freezing effect.

[0043] By setting the upper end of the pressure-reducing column 3 into an inverted frustum structure and matching it with the tapered hole 402 of the pressure-bearing plate 4, when the pressure-bearing plate 4 is pushed by the pressure inside the water meter housing 1, it only needs to move a small distance to generate a gap between the tapered hole 402 and the tapered surface of the inverted frustum structure at the upper end of the pressure-reducing column 3, so that the pressure-relieving hole 301 is communicated with the inside of the water meter housing 1 for pressure relief. This ensures the sealing performance and improves the sensitivity of pressure relief, avoiding the situation that the pressure-relieving hole 301 needs the pressure-bearing plate 4 to move too large a distance to be communicated with the inside of the water meter housing 1, resulting in poor overall pressure-relieving sensitivity and easy damage to the water meter components and poor anti-freezing effect.

[0044] Embodiment 2

[0045] As Figures 5 to 8 shown, on the basis of Embodiment 1, the bottom cover 2 is fixedly connected with a sealing plate 203 through two connecting columns 202, and the two connecting columns 202 are arranged in a circumferential array relative to the pressure-reducing column 3. The sealing plate 203 is provided with a through hole 204 adapted to the pressure-reducing column 3, and second sealing members 205 are installed between the sealing plate 203 and the inner wall of the pressure-reducing chamber 101, and between the through hole 204 and the pressure-reducing column 3. The second sealing member 205 is an O-ring, which is installed on the inner wall of the through hole 204 and the circumferential surface of the sealing plate 203.

[0046] Among them, the lower end of the compression spring 303 abuts against the upper surface of the sealing plate 203, and the upper end abuts against the lower surface of the bearing plate 4. The connecting column 202 and the sealing plate 203 are of an integral structure. An accommodation hole 206 extending into the interior of the connecting column 202 is provided on the upper surface of the sealing plate 203, and an airbag 5 is installed in the accommodation hole 206. The connecting column 202 and the bottom cover 2 can be connected by welding, or the bottom cover 2, the connecting column 202 and the sealing plate 203 are of an integral structure as a whole.

[0047] The sealing plate 203 forms a sealed isolation chamber between the sealing plate 203 and the bearing plate 4, which is beneficial to reducing the direct influence of the external air temperature on the interior of the water meter housing 1. By adding the airbag 5 and utilizing the thermal expansion and contraction effect of the airbag 5, when the weather is cold, the airbag 5 contracts, thereby reducing the air pressure inside the isolation chamber, facilitating the downward movement of the bearing plate 4 when the bearing plate 4 is subjected to the internal pressure of the water meter housing 1. At the same time, when the temperature is relatively high, the airbag 5 expands, increasing the air pressure inside the isolation chamber, thereby improving the stability of the position of the bearing plate 4 and ensuring the sealing effect.

[0048] As Figure 10 shown, as another preferred embodiment, support columns 405 corresponding one-to-one to the accommodation holes 206 are fixedly connected to the lower surface of the bearing plate 4. The support columns 405 and the bearing plate 4 can be connected by threading or welding. The lower end of the support column 405 is fixedly connected to a support plate 406 that closely abuts against the upper end of the airbag 5.

[0049] Thus, when the airbag 5 expands at a high temperature, it pushes the support plate 406 upward, thereby generating an upward thrust on the bearing plate 4, and then improving the position stability of the bearing plate 4, avoiding accidental movement of the bearing plate 4 and preventing water leakage.

[0050] In winter, the airbag 5 contracts, and the airbag 5 no longer supports the support plate 406 or the supporting force is very small, so that the bearing plate 4 returns to the state of being supported only by the compression spring 303. Thus, when the interior of the water meter housing 1 freezes and the pressure increases, the bearing plate 4 can be pushed downward to achieve pressure relief.

[0051] At the same time, the bottom cover 2 is provided with an adjustment hole communicating with the accommodation hole 206. A plug 6 is threadedly connected in the adjustment hole. The lower end surface of the plug 6 is provided with an internal hexagonal hole or a cross slot, which is convenient for rotation by a wrench or a screwdriver. By adjusting the axial position of the plug 6, the lower end of the airbag 5 is supported by the plug 6, thereby realizing the adjustment of the vertical position of the airbag 5, facilitating the flexible adjustment of the force of the airbag 5 supporting the bearing plate 4. Thus, it can be ensured that the airbag 5 contracts in cold weather and loses the support for the bearing plate 4, and after the temperature rises, it can increase the support for the bearing plate 4, improving the stability of the bearing plate 4 and enhancing the overall use reliability and flexibility.

[0052] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0053] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A water meter with an anti-freezing structure, comprising a water meter housing (1), characterized in that: A pressure reducing chamber (101) is provided at the bottom of the water meter housing (1), and a bottom cover (2) is connected to the lower end of the pressure reducing chamber (101); The bottom cover (2) is fixedly connected with a pressure reducing column (3). A pressure relief hole (301) is provided at the lower end of the pressure reducing column (3), and a pressure discharge hole (302) communicating with the pressure relief hole (301) is provided on the side wall; The pressure reducing column (3) is movably inserted with a bearing plate (4) and sleeved with a compression spring (303). First seals (401) are installed between the bearing plate (4) and both the pressure reducing chamber (101) and the pressure reducing column (3). The bearing plate (4) is supported upward by the compression spring (303), and the pressure discharge hole (302) is blocked by the bearing plate (4). When the internal pressure of the water meter housing (1) increases and the bearing plate (4) is pushed downward, the water inside the water meter housing (1) is discharged through the pressure discharge hole (302) and the pressure relief hole (301), realizing pressure relief inside the water meter housing (1).

2. The water meter with an anti-freezing structure according to claim 1, characterized in that, The diameter of the upper end of the pressure reducing column (3) gradually increases, forming an inverted frustum structure; the bearing plate (4) is provided with a tapered hole (402) adapted to the upper end of the pressure reducing column (3).

3. The water meter with an anti-freezing structure according to claim 2, characterized in that, The pressure discharge hole (302) is provided on the tapered surface of the inverted frustum structure at the upper end of the pressure reducing column (3). A convex edge (403) adapted to the pressure reducing column (3) is provided at the edge of the lower port of the tapered hole (402), and a sealing ring (404) is installed between the convex edge (403) and the pressure reducing column (3).

4. A water meter with an anti-freezing structure according to claim 1 or 2 or 3, characterized in that, A threaded hole (201) is provided on the upper surface of the bottom cover (2), and the lower end of the pressure reducing column (3) is threadedly connected to the threaded hole (201).

5. The water meter with an anti-freezing structure according to claim 4, characterized in that, The bottom cover (2) is fixedly connected with a sealing plate (203) through a plurality of connecting columns (202). The sealing plate (203) is provided with a through hole (204) adapted to the pressure reducing column (3). Second seals (205) are installed between the sealing plate (203) and the inner wall of the pressure reducing chamber (101), and between the through hole (204) and the pressure reducing column (3).

6. The water meter with an anti-freezing structure according to claim 5, characterized in that, The connecting column (202) and the sealing plate (203) are of an integral structure. A receiving hole (206) extending into the connecting column (202) is provided on the upper surface of the sealing plate (203), and an airbag (5) is installed in the receiving hole (206).

7. The water meter with an anti-freezing structure according to claim 6, wherein, The plurality of connecting columns (202) are arranged in a circumferential array relative to the pressure reducing column (3).

8. The water meter with an anti-freezing structure according to claim 7, wherein, A support column (405) corresponding to the receiving hole (206) one by one is fixedly connected to the lower surface of the bearing plate (4), and a support plate (406) tightly attached to the upper end of the airbag (5) is fixedly connected to the lower end of the support column (405).

9. A water meter with an anti-freezing structure according to claim 1, characterized in that, The bottom cover (2) is provided with an adjusting hole communicating with the receiving hole (206). A plug column (6) is threadedly connected in the adjusting hole. By adjusting the axial position of the plug column (6), the vertical position of the airbag (5) is adjusted.

10. The water meter with an anti-freezing structure according to claim 5, wherein, The lower end of the compression spring (303) abuts against the upper surface of the sealing plate (203).

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