Water meter anti-freezing structure for low-temperature environment

Abstract

The invention provides a water meter anti-freezing structure used in a low-temperature environment, and relates to the technical field of water meter anti-freezing design, the water meter anti-freezing structure comprises a connecting pipe and a heat preservation sleeve, the connecting pipe is connected with a water inlet and a water outlet of a water passing pipe in a water meter through a pipe joint assembly; the heat preservation sleeve wraps the position where the pipe connector assembly is located. The heat preservation sleeve is arranged at the position of the pipe connector, the freezing sequence of the pipeline and water in the water meter can be controlled, the water meter and other positions of the pipeline are frozen firstly, the position of the pipe connector assembly provided with the heat preservation sleeve is frozen finally, the pressure concentration position of water freezing is located at the position of the pipe connector assembly, and therefore the effect of protecting the water meter is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of water meter antifreeze design, and in particular to a water meter antifreeze structure used in a low temperature environment. Background Art

[0002] Water meters are important instruments for counting tap water in residents' daily lives. In cold seasons, when the water in the water meter starts to flow, the flowing water will not freeze; when the water in the water meter stops flowing, it is very easy to freeze. Therefore, water meters often freeze and burst, affecting residents' water use.

[0003] In order to prevent the water meter from being damaged by freezing, the staff will insulate the water meter, such as wrapping the outside of the water meter with insulation material, or installing an insulation shell on the outside of the water meter, or installing the water meter below the underground antifreeze layer.

[0004] However, under some extreme climate conditions, such as exceeding the minimum temperature limit, cooling of the underground constant temperature layer, freezing rain disasters in southern regions, etc., the temperature at the water meter installation location will still be too low, causing ice to form inside the water meter. After the water inside the water meter freezes, the volume expands. The expanded ice will exert a strong pressure on the water meter components, causing damage to the metering sensor inside the water meter, and will cause damage to the instrument, resulting in water leakage.

[0005] Therefore, it is necessary to develop a new structure that can be suitable for extremely low temperatures to prevent water meters from being damaged by freezing. Summary of the invention

[0006] The purpose of the present invention is to provide a water meter antifreeze structure for low temperature environment to solve the problems existing in the above-mentioned prior art. By arranging a thermal insulation sleeve at the pipe joint position, the freezing order of water in the pipeline and the water meter can be controlled, so that the water meter and other positions of the pipeline freeze first, and the pipe joint assembly position where the thermal insulation sleeve is arranged freezes last, so that the pressure concentration position of the water freezing is located at the pipe joint assembly, thereby playing a role in protecting the water meter.

[0007] To achieve the above object, the present invention provides the following solutions:

[0008] A water meter antifreeze structure for low temperature environment comprises a connecting pipe and a heat preservation sleeve, wherein the connecting pipe is respectively connected to the water inlet and the water outlet of the water pipe in the water meter through a pipe joint assembly; and the heat preservation sleeve wraps the position of the pipe joint assembly.

[0009] As an embodiment, the thermal insulation sleeve includes a first split body and a second split body, and the first split body and the second split body are respectively buckled on radial sides of the pipe joint assembly, and the first split body and the second split body are fixedly connected after buckling.

[0010] As an implementation manner, one side of the first split body is hinged to one side of the second split body, and the other side of the first split body is fixed to the other side of the second split body by a buckle.

[0011] As an embodiment, the insulation sleeve has an accommodating cavity inside, and the contour shape of the accommodating cavity is adapted to the outer contour shapes of the pipe joint assembly, the water inlet section, the water outlet section and the connecting pipe.

[0012] As one embodiment, the end of the water inlet section and the end of the water outlet section are both provided with external threads, and the pipe joint assembly includes a connecting nut sleeved on the end of the connecting pipe, the end of the connecting pipe abuts against the end of the water inlet section or the end of the water outlet section, and the connecting nut is threadedly connected to the end of the water inlet section and the end of the water outlet section.

[0013] As an embodiment, the pipe joint assembly further includes a sealing gasket disposed between an end of the connecting pipe and an end of the water inlet section and an end of the water outlet section.

[0014] As one implementation, the connecting pipe is made of PPR material.

[0015] As an implementation manner, the water pipe is made of stainless steel.

[0016] As one implementation, the thermal insulation cover is made of EPS material.

[0017] As one implementation, the water meter is an ultrasonic water meter.

[0018] Compared with the prior art, the present invention has the following technical effects:

[0019] The present invention can control the freezing order of water in the pipeline and the water meter by arranging the heat-insulating sleeve at the pipe joint position, so that the water meter and other positions of the pipeline freeze first, and the pipe joint assembly position where the heat-insulating sleeve is arranged freezes last, so that the pressure concentration position of the water freezing is located at the pipe joint assembly, thereby playing a role in protecting the water meter; when the pipe joint position is cracked by water freezing, the maintenance cost is lower than replacing the water meter.

[0020] Other technical solutions in the present invention have the following technical effects compared with the prior art:

[0021] The connecting pipe in the present invention is made of PPR material and has a certain elastic deformation capacity. When the water inside the connecting pipe freezes and expands, the connecting pipe can expand appropriately, and when the water melts, it can restore a certain deformation, thereby reducing the possibility of being burst. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 It is a structural schematic diagram of a water meter antifreeze structure installed on a water meter in one embodiment of the present invention;

[0024] Figure 2 for Figure 1 A top view of

[0025] Figure 3 for Figure 1 A schematic diagram of a side cross-section structure;

[0026] Figure 4 for Figure 3 A partial enlarged schematic diagram of the middle area A;

[0027] Figure 5 It is a schematic structural diagram of the first split body in one embodiment of the present invention.

[0028] Description of reference numerals:

[0029] 1. Shell; 2. Water inlet section; 3. Water outlet section; 4. Connecting pipe; 5. Insulation sleeve; 6. First split body; 7. Accommodating chamber; 8. Connecting nut; 9. Sealing gasket. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] The purpose of the present invention is to provide a water meter antifreeze structure for low temperature environment to solve the problems existing in the prior art. By arranging a thermal insulation sleeve at the pipe joint position, the freezing order of water in the pipeline and the water meter can be controlled, so that the water meter and other positions of the pipeline freeze first, and the pipe joint assembly position where the thermal insulation sleeve is arranged freezes last, so that the pressure concentration position of the water freezing is located at the pipe joint assembly, thereby protecting the water meter.

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] like Figure 1 to Figure 4 As shown, this embodiment provides a water meter antifreeze structure for low temperature environment, which is suitable for various types of water meters, such as ultrasonic water meters. The water meter includes a housing 1 and a detection module and a water pipe located in the housing 1. The water pipe includes an inlet section 2 and an outlet section 3. The detection module generally includes a sensor, a signal processing circuit, a power supply module, etc. Water flows in from the inlet section 2 and flows out from the outlet section 3. The flow rate flowing through the water pipe is detected by the sensor. The water meter antifreeze structure includes a connecting pipe 4 and a heat preservation sleeve 5. The ends of the inlet section 2 and the outlet section 3 are respectively connected to the connecting pipe 4 through a pipe joint assembly, and the heat preservation sleeve 5 wraps the position of the pipe joint assembly. Specifically, in addition to completely wrapping the pipe joint assembly, the heat preservation sleeve 5 also wraps the ends of the inlet section 2, the outlet section 3 and the connecting pipe 4 near the pipe joint assembly.

[0034] In a low-temperature environment, when the water in the pipeline stops flowing and begins to freeze, it usually starts to freeze at a certain point or position, and the first position to freeze is usually a position with a faster heat exchange rate with the external environment, such as the position of a metal pipe. After the water at a certain position freezes, its volume expands and squeezes the water at the adjacent position. Therefore, under the premise of putting aside the local aging of the pipeline itself, the existence of internal damage and other inherent factors, the pipe at the position that freezes first will usually not be cracked by the frozen water. On the contrary, the position that freezes last has a high probability of being cracked by the frozen water because the water at the adjacent position has already frozen during the freezing process. The water at the position where the water freezes is concentrated under the action of the surrounding ice during the freezing process.

[0035] In this embodiment, the position where the pipe joint assembly is located is insulated. Under low temperature conditions, since the pipe joint assembly is protected by the insulation sleeve 5, the heat exchange rate between the water in this position and the external low temperature environment is slow, while other positions lack insulation measures, and the heat exchange between the internal water and the external low temperature environment is fast, resulting in the water in the pipeline and the water meter first freezing at the water meter and other positions of the pipeline, and the position where the pipe joint assembly is protected by the insulation sleeve 5 is frozen last. The position where the pipe joint assembly is located is a location where pressure is concentrated and is also the location most prone to bursting.

[0036] Therefore, this embodiment can control the freezing order of water in the pipeline and the water meter by setting the insulation sleeve 5 at the pipe joint position, so that the water meter and other positions of the pipeline freeze first, and the pipe joint assembly position where the insulation sleeve 5 is set freezes last, so that the pressure concentration position of the frozen water is located at the pipe joint assembly, thereby protecting the water meter; when the pipe joint position is cracked by water freezing, the maintenance cost is lower than replacing the water meter.

[0037] In this embodiment, the water inlet section 2 and the water outlet section 3 of the water meter are made of stainless steel, which has high strength and usually will not be cracked by water freezing. The connecting pipe 4 is made of PPR (random copolymer polypropylene). PPR material has a certain elastic deformation capacity. When the water inside it freezes and expands, the connecting pipe 4 can expand appropriately. When the water melts, it can restore a certain deformation, thereby reducing the possibility of being cracked.

[0038] In this embodiment, the insulation sleeve 5 can be insulation cotton directly wrapped around the position of the pipe joint assembly. In order to facilitate the installation and fixation of the insulation sleeve 5, in this embodiment, the insulation sleeve 5 includes a first split body 6 and a second split body, and the first split body 6 and the second split body are respectively buckled on both radial sides of the pipe joint assembly, and the first split body 6 and the second split body are fixedly connected after buckling. Specifically, one side of the first split body 6 is hinged to one side of the second split body, and the other side of the first split body 6 is fixed to the other side of the second split body by a buckle.

[0039] In this embodiment, the insulation sleeve 5 has a accommodating cavity 7 inside, and the contour shape of the accommodating cavity 7 is adapted to the outer contour shape of the pipe joint assembly, the water inlet section 2, the water outlet section 3 and the connecting pipe 4, thereby improving the wrapping of the pipe joint assembly and the adjacent pipeline parts, thereby enhancing the thermal insulation performance.

[0040] In this embodiment, the ends of the water inlet section 2 and the water outlet section 3 are both provided with external threads. The pipe joint assembly includes a connecting nut 8 sleeved on the end of the connecting pipe 4. The end of the connecting pipe 4 abuts against the end of the water inlet section 2 or the end of the water outlet section 3. The connecting nut 8 is threadedly connected to the end of the water inlet section 2 and the end of the water outlet section 3, and the connecting pipe 4 is pressed tightly.

[0041] In order to improve the sealing performance of the pipe joint assembly at the connection position, the pipe joint assembly in this embodiment also includes a sealing gasket 9 arranged between the end of the connecting pipe 4 and the ends of the water inlet section 2 and the end of the water outlet section 3.

[0042] In this embodiment, the insulation sleeve 5 is made of EPS (expandable polystyrene), which has good thermal insulation performance, low density and excellent anti-aging performance.

[0043] Adaptive changes made according to actual needs are all within the protection scope of the present invention.

[0044] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A water meter antifreeze structure for low temperature environment, characterized in that: include: A connecting pipe, wherein the connecting pipe is connected to a water inlet and a water outlet of a water pipe in a water meter through a pipe joint assembly; And a heat-insulating sleeve, wherein the heat-insulating sleeve wraps the location of the pipe joint assembly.

2. The water meter antifreeze structure for low temperature environment according to claim 1, characterized in that: The heat preservation sleeve comprises a first split body and a second split body, wherein the first split body and the second split body are respectively buckled on two radial sides of the pipe joint assembly, and the first split body and the second split body are fixedly connected after being buckled.

3. The water meter antifreeze structure for low temperature environment according to claim 2, characterized in that: One side of the first split body is hinged to one side of the second split body, and the other side of the first split body is fixed to the other side of the second split body by a buckle.

4. The water meter antifreeze structure for low temperature environment according to claim 3, characterized in that: The insulation sleeve has an accommodating cavity inside, and the contour shape of the accommodating cavity is adapted to the outer contour shapes of the pipe joint assembly, the water inlet section, the water outlet section and the connecting pipe.

5. The water meter antifreeze structure for low temperature environment according to claim 1, characterized in that: The water pipe includes a water inlet section and a water outlet section, and the ends of the water inlet section and the water outlet section are both provided with external threads. The pipe joint assembly includes a connecting nut sleeved on the end of the connecting pipe, the end of the connecting pipe abuts against the end of the water inlet section or the end of the water outlet section, and the connecting nut is threadedly connected to the end of the water inlet section and the end of the water outlet section.

6. The water meter antifreeze structure for low temperature environment according to claim 5, characterized in that: The pipe joint assembly further includes a sealing gasket arranged between the end of the connecting pipe and the end of the water inlet section and the end of the water outlet section.

7. The water meter antifreeze structure for low temperature environment according to claim 1, characterized in that: The connecting pipe is made of PPR material.

8. The water meter antifreeze structure for low temperature environment according to claim 1, characterized in that: The water pipe is made of stainless steel.

9. The water meter antifreeze structure for low temperature environment according to claim 1, characterized in that: The thermal insulation cover is made of EPS material.

10. The water meter antifreeze structure for low temperature environment according to claim 1, characterized in that: The water meter is an ultrasonic water meter.

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