Anti-freezing water meter capable of increasing freezing avoiding space

Abstract

The utility model discloses an anti-freezing water meter capable of increasing a freezing avoiding space, which relates to the technical field of freezing prevention and freezing prevention of water meters, aims to solve the problem of volume expansion pressure after water in the water meter is frozen, and comprises an impeller box arranged in a meter shell, an impeller is arranged in the impeller box, and a contraction blind hole which is formed downwards along with the shape is formed in the impeller box. The impeller box is connected with a gear box assembly through an installation component, the outer side of the gear box assembly is connected with a transparent cover, the gear train assembly comprises a signal sending pointer with a signal generator, and the signal generator is wrapped in the signal sending pointer. And in addition, the structure is simple, the assembly is convenient, and the cost is low.

Description

Technical Field

[0001] The utility model belongs to the technical field of antifreeze and anti-freeze of water meters, and particularly relates to an antifreeze water meter with increased freezing avoidance space. Background Art

[0002] Water meters are essential public metering instruments, with a large population and widespread coverage. However, every winter, reports of numerous water meters suffering from frostbite and cracking due to cold snaps are common. This is particularly true in the middle and lower reaches of the Yangtze River, where most water meters are exposed to the air and are extremely vulnerable to freezing weather, causing internal and external damage. External damage, if not promptly repaired, can disrupt daily life at best, and even lead to economic losses and disputes at worst. Internal damage, while not externally damaged, can cause internal deformation of some meters, severely impacting their metering performance. Internal damage is more concealed, making it difficult to detect and often taking a long time to detect.

[0003] To minimize the impact of cold snaps on water meters, existing antifreeze and frost prevention technologies for water meters can be broadly categorized into three stages, depending on the stage of freezing: freeze warning technology, antifreeze technology, and freeze-resistant technology. This technology utilizes high-strength materials or freeze-resistant structures with excellent toughness to prevent structural damage, electronic failure, and metering performance degradation after freezing. High-strength materials include nylon and polyphenylene ether plastics for meter cases, and polycarbonate and nylon 12 plastics for glass. Frost-resistant structures primarily include space-avoidance and drainage-pressure-relief types. Space-avoidance structures accommodate the expansion of frozen water by preserving space, thereby preventing damage to meter components caused by this expansion force. Common structures for this preserving space include a piston with a hollow air bladder and foam pad, a compressible elastomer, a metal dome, or a spring. The drainage and pressure relief antifreeze structure opens the drain valve and drain hole when the water pressure caused by the expansion of part of the water freezing is greater than the preset elastic force, releasing the high water pressure and preventing the volume expansion of all the water freezing, thereby achieving antifreeze of the water meter.

[0004] For example, Chinese patent publication number CN108931278B employs an anti-freeze mechanism that combines spatial avoidance and drainage pressure relief. When the water meter's internal pressure exceeds the spring force, the unfrozen water pushes the piston rod to move, opening the drainage channel and releasing the internal pressure. However, Chinese patent publication number CN108931278B suffers from a complex structure, low production efficiency, and difficulty controlling the spring force. Excessive spring force damages other components first due to the freezing pressure, while insufficient spring force causes premature drainage of the water meter's inlet and outlet before the water is completely frozen, effectively causing the meter to leak. Furthermore, impurities and ice chips can easily clog the drain hole, or the spring piston can freeze, rendering the anti-freeze function of drainage and pressure relief ineffective. Utility Model Content

[0005] In order to solve the problem of volume expansion pressure after water in the water meter freezes into ice, the utility model proposes an antifreeze water meter with increased freezing avoidance space, which reduces the number of gears, increases the freezing avoidance space, and has a simple structure, easy assembly and low cost.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions: an antifreeze water meter with increased freezing avoidance space,

[0007] It includes an impeller box arranged in the watch case, an impeller is provided in the impeller box, a shrinkage blind hole is provided on the impeller box which is opened downward in accordance with the shape, the impeller box is connected to the gear box assembly through a mounting member, a transparent cover is connected to the outside of the gear box assembly, and the gear train assembly includes a signal pointer with a signal generator, and the signal generator is covered inside the signal pointer.

[0008] In this technical solution, shrinkage blind holes and conformal cavities are respectively provided in the impeller box and the upper splint, which reserve space for the volume expansion and release of water freezing without increasing the complexity of the structure, thereby improving the anti-freezing ability of the water meter; a transparent cover with a simple structure is provided between the gear train assembly and the case assembly, which eliminates the need to significantly adjust the water meter structure, reduces the actual new mold cost, shortens the development cycle, and reduces the risk of new research and development, thereby locking a large amount of air when the water meter is in use, providing sufficient volume expansion avoidance space for freezing, and avoiding damage to the water meter; through the multi-level anti-freezing design, the water meter can adapt to freezing conditions of different intensities.

[0009] Preferably, the signal-transmitting pointer includes a needle dial with a hollow cylindrical structure having side surfaces and a top surface, a small dial is provided on the top surface of the needle dial, a buckle extends inward from the bottom of the side surface of the needle dial, a buckle groove is provided on the side edge of the buckle, the needle dial is connected to a needle holder that is clamped in the buckle, a second connecting piece is connected to the first side of the needle holder, the second connecting piece is an annular cylindrical shaft hole with an outer circle and an inner square, and a convex rib is provided on the second side edge.

[0010] Preferably, a plurality of protrusions extend upward at intervals above the impeller box, the interval between two of the protrusions forms a water inlet grid, the bottom of the water inlet grid is located at the upper edge of the impeller box, the protrusions are located above the upper edge of the impeller box, and the shrinkage blind hole extends upward from the bottom end of the protrusion into the protrusion.

[0011] Preferably, the transparent cover is integrally formed by a top plate and a cylindrical side plate, the top plate is composed of a large cylinder connected to the first end of the side plate and a small cylinder connected to the large cylinder, the small cylinder is provided with a signal pointer collection window, the outer side of the side plate is provided with a movement positioning boss, the second end of the side plate is provided with a counter positioning groove, and a positioning square platform extends inward at the connection between the side plate and the top plate.

[0012] Preferably, the inner side wall of the impeller box is a cylindrical surface, a cylindrical groove is provided in the center of the inner bottom surface of the impeller box, a top is embedded in the groove, and a plurality of radially arranged lower damping ribs are provided on the inner bottom surface of the impeller box around the groove.

[0013] Preferably, the mounting member includes an upper damping rib plate, a first side of the upper damping rib plate is connected to a plurality of connecting parts, a second side is connected to a plurality of radially distributed damping ribs, the upper damping rib plate is sequentially connected to a lower clamping plate and a middle clamping plate, the middle clamping plate is connected to one end of the gear train, and the other end of the gear train is connected to the upper clamping plate.

[0014] Preferably, the connecting member includes a supporting portion and a positioning portion, the supporting portion is a solid smooth cylinder with a rounded rectangular cross-section, one end of the supporting portion is connected to the first side of the damping rib, and the other end is connected to a guide slope of the positioning portion, the guide slope is connected to the top surface, and the top surface is a circular plane.

[0015] Preferably, the watch case is provided with a water inlet, a filter is provided on the outside of the impeller box, the highest point of the water inlet is connected to the upper edge of the filter, and the water inlet is connected to a smooth transition arc surface that allows water to flow smoothly.

[0016] Preferably, an adjusting plate is provided at the bottom of the impeller box, and the adjusting plate is connected to the impeller box via a fastening screw.

[0017] Preferably, a plurality of water outlet grilles are provided on the side of the impeller box, and a baffle is connected to the edge of one side of the water outlet grilles.

[0018] The beneficial effects of the utility model are:

[0019] 1) A shrinkage blind hole and a conformal cavity are respectively provided in the impeller box and the upper clamping plate, which reserve space for the volume expansion of water when it freezes without increasing the complexity of the structure, thereby improving the anti-freezing ability of the water meter;

[0020] 2) The transparent cover locks in a large amount of air when the water meter is in use, providing ample space for volume expansion in the event of freezing, thus preventing damage to the water meter. The transparent cover has a simple structure and does not require significant adjustments to the water meter structure, thus reducing the actual cost of opening a new mold, shortening the development cycle, and lowering the risk of new R&D.

[0021] 3) Multi-level anti-freeze design, the conformal cavity structure can be applied to short-term, low-intensity freezing conditions to ensure the normal operation of the water meter. The transparent cover structure can resist long-term, high-intensity freezing damage and does not affect the water metering after the freezing recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The utility model is a cross-sectional view of an antifreeze water meter with increased freezing avoidance space.

[0023] Figure 2 The utility model is a cross-sectional view of an impeller box and its components of an antifreeze water meter with increased freezing avoidance space.

[0024] Figure 3 The utility model is a cross-sectional view of an upper damping rib plate of an antifreeze water meter with increased freezing avoidance space.

[0025] Figure 4 The utility model is a schematic diagram of the lower splint structure of an antifreeze water meter with increased freezing avoidance space.

[0026] Figure 5 The utility model is a schematic diagram of the upper splint structure of an antifreeze water meter with increased freezing avoidance space.

[0027] Figure 6 The utility model is an axial sectional view of a transparent cover of an antifreeze water meter with increased freezing avoidance space.

[0028] Figure 7 The present invention is a schematic diagram of an upper clamping plate for installing a signal pointer of an antifreeze water meter.

[0029] Figure 8 The present invention is a schematic diagram of the structure of a signal pointer of an antifreeze water meter.

[0030] Figure 9 The diagram is a schematic diagram of an upper splint of an antifreeze water meter according to the present invention without a signal pointer installed.

[0031] Figure 1: Case 1; smooth transition arc surface 1-1; impeller box 2; shrinkage blind hole 2-1; outlet grille 2-2; inlet grille 2-3; top 2-4; inner cylindrical surface 2-5; trapezoidal surface 2-6; lower cylindrical surface 2-7; lower damping rib 2-8; adjustment plate 2-9; fastening screw 2-10; upper damping rib plate 3; connecting piece 3-1; guide slope 3-1-1; edge 3-1-2; fillet 3-1-3; rib plate impeller hole 3-2; reinforcing rib 3-3; shrinkage groove 3-4; rib plate cylindrical surface 3-5; damping rib 3-6; lower splint 4; positioning flange 4-1; fastening screw hole 4-2; connecting piece hole 4-3; lower plate impeller hole 4-4; middle splint 5; upper splint 6; conformal cavity 6-1; positioning groove 6 -2; cylindrical side plate 6-3; center hole 6-4; alignment mark 6-5; transparent cover 7; large cylinder 7-1; small cylinder 7-2; signal pointer collection window 7-3; transparent cover side plate 7-4; movement positioning boss 7-5; counter positioning groove 7-6; positioning square table 7-7; filter 8; impeller 9; gear train 10; movement gasket 11; anti-slip gasket 12; middle cover 13; signal pointer 14; needle dial 14-1; small dial 14-1-1; signal generator slot 14-1-2; needle dial side 14-1-3; buckle slot 14-1-4; buckle 14-1-5; signal generator 14-2; needle support 14-3; rib edge 14-3-1; flat circular plate 14-3-2; hole column 14-3-3. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific implementation method described here is only an optimal embodiment of the present invention, which is only used to explain the present invention and does not limit the scope of protection of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] Example 1

[0034] This embodiment provides an antifreeze water meter with increased freezing avoidance space. Figure 1 , including a case assembly, an impeller box assembly, a counter assembly and a mounting component, can withstand long-term, high-intensity freezing damage and does not affect water metering after freezing recovery.

[0035] Among them, the case assembly includes a case 1 with a water inlet, which is connected to the lower plane of the upper edge of the filter screen, eliminating the water baffle structure, and the water inlet is provided with a smooth transition arc surface 1-1 that allows water to flow smoothly.

[0036] The curved surface design of the water inlet of the case not only reduces the vortex loss, steering loss and impact loss of water pressure, but also reduces the water capacity of the case and improves the anti-freeze effect of the water meter.

[0037] The impeller box assembly is arranged inside the case assembly and consists of an impeller box 2, an adjusting piece 2-9, a fastening screw 2-10, a filter screen 8 and an impeller 9.

[0038] The impeller box is provided with a plurality of shrinkage blind holes 2-1, and the impeller box assembly is connected to the gear train assembly through a mounting member.

[0039] The gear train assembly includes a signal pointer 14 and an upper plate 6. The first end of the upper plate is provided with a conformal cavity 6-1, and a transparent cover 7 is provided between the second end and the case assembly. The gear train assembly is arranged in the movement cavity surrounded by the transparent cover. The signal pointer has a signal generator 14-2 enclosed inside the signal pointer.

[0040] The watch case is connected to a middle cover 13 , a cavity is formed between the middle cover and the watch case, and a transparent cover is arranged in the cavity.

[0041] The transparent cover is integrally formed of high-strength transparent plastic and includes a top plate and transparent cover side plates 7-4. The top plate is composed of a large cylinder 7-1 and a small cylinder 7-2. The small cylinder is provided with a signal pointer collection window 7-3.

[0042] The large cylinder and the small cylinder are both cylindrical structures. The bottom surface of the large cylinder is a circular plane, and the bottom surface of the small cylinder is a spherical surface.

[0043] By adopting a spherical design, the allowable deformation of the transparent cover is increased, and the compressive and tensile resistance of the transparent cover is improved, making it more suitable for use in environments with high water pressure and high stress.

[0044] In this embodiment, the signal transmitting pointer collection window is a circular step blind hole with a diameter equivalent to that of the signal transmitting pointer.

[0045] In some other embodiments, the signal transmitting pointer collection window may also be a gap extending from the edge of the small cylinder toward the inside and covering the area corresponding to the signal transmitting pointer.

[0046] The side panel is cylindrical, the first end of the side panel is connected to the large cylinder of the top panel, the second end of the side panel is provided with a counter positioning groove 7-6, the outer side wall of the side panel is provided with a movement positioning boss 7-5, and the inner connection between the side panel and the large cylinder is provided with a positioning square platform 7-7.

[0047] The inner diameter of the side plate is the same as the diameter of the small cylinder, and the outer diameter of the side plate is smaller than the diameter of the large cylinder.

[0048] In this embodiment, the counter positioning grooves are a plurality of notches opened at the second end of the side panel. The plurality of notches are square notches extending upward from the edge of the side panel and are distributed in a circular pattern. The counter positioning grooves are engaged with the counter to play a positioning role.

[0049] The movement positioning boss is a square protrusion set on the outside of the side panel, which can be snapped into the watch case to play a positioning role.

[0050] The positioning square platform is a square protrusion set on the inner side of the side panel, which can be engaged with the movement to play a positioning role.

[0051] In this embodiment, an integrally formed transparent cover structure is used to replace the gear box and glass structure of the water meter in the prior art. The structure is simple and easy to process, and there is no need to significantly adjust the water meter structure, which reduces the actual cost of opening a new mold, shortens the development cycle, and reduces the risk of new research and development. In addition, there is no need to add additional parts and no need to occupy a larger water meter size space.

[0052] The integrated transparent cover allows the water meter to lock in a large amount of air during use, providing ample space for volume expansion in the event of freezing, thus preventing damage to the water meter. This structure enables the water meter to withstand long-term and severe freezing damage, and does not affect water metering after the freezing recovery.

[0053] A movement gasket 11 is provided between the movement positioning boss of the transparent cover and the large cylinder, and an anti-slip gasket 12 is provided between the transparent cover and the middle cover.

[0054] The impeller box is provided with a shrinkage blind hole, a water outlet grid 2-2, a water inlet grid 2-3, a top and a lower damping rib.

[0055] like Figure 2 As shown, a cylindrical groove is provided in the center of the inner side of the bottom of the impeller box, and the top 2-4 is embedded in the cylindrical groove. A number of radially arranged lower damping ribs 2-8 are provided on the inner bottom surface of the impeller box around the cylindrical groove. An impeller shaft is provided in the center of the impeller. One end of the impeller shaft passes through the rib plate impeller hole 3-2, the lower plate impeller hole 4-4 and the middle splint through-hole of the mounting component until it is connected to the center hole 6-4 of the upper splint 6 of the gear train assembly, and the other end is connected to the top of the impeller box.

[0056] The impeller box includes a cylindrical box body side and a circular box body bottom, the box body side includes an inner cylindrical surface 2-5, the top of the inner cylinder extends outward to form an upper edge 2-6, a plurality of protrusions are provided on the upper edge, the interval between two of the protrusions forms a water inlet grid, the bottom of the water inlet grid is located on the upper edge of the impeller box, the protrusion is located above the upper edge of the impeller box, the shrinkage blind hole extends upward from the bottom end of the protrusion into the protrusion, the lower half of the inner cylindrical surface is provided with a plurality of square water outlet grids, and the edge of one side of the water outlet grid extends outward with a baffle.

[0057] The lower plane of the upper edge is connected to a filter screen, which includes a columnar side surface and an outwardly convex arc-shaped lower bottom surface. The top of the columnar side surface extends outward to form the upper edge of the filter screen.

[0058] An adjusting piece is provided at the bottom of the impeller box, and the adjusting piece is connected to the impeller box via a fastening screw.

[0059] In this embodiment, the impeller box is provided with 4 water inlet grids and 4 water outlet grids. Figure 2 As shown, the water inlet grille is a columnar opening, the upper plane of the upper edge is annular, the bottom surface of the water inlet grille is located in the plane where the upper plane of the upper edge is located, and the water inlet grille is formed by the intersection of a first plane and a second plane parallel to the first plane and the upper plane of the upper edge, the first plane and the second plane are perpendicular to the upper plane of the upper edge and are located on the same side of the center of the upper edge.

[0060] Protrusions are provided between adjacent water inlet grilles. The protrusions extend upward from the upper plane of the upper edge to form shrinkage blind holes extending upward from the bottom ends of the protrusions to the inside of the protrusions.

[0061] In this embodiment, the center of the water inlet grid is concave downward to form a second shrinkage blind hole, and the lower bottom surface outside the second shrinkage blind hole is a lower cylindrical surface 2-7.

[0062] In this embodiment, an antifreeze water meter with increased freezing avoidance space changes the direction of the shrinkage holes that have no functional function when demolded, and opens shrinkage blind holes that can absorb volume expansion along the shape. Without increasing the complexity of the structure, space is reserved for releasing the volume expansion of water freezing, thereby improving the antifreeze ability of the water meter.

[0063] The water outlet grid is a through hole formed on the side of the impeller box body by two planes parallel to the first plane and two planes parallel to the upper plane of the upper edge of the impeller box. The outer wall of the side of the box body at the water outlet grid is a plane. The side of the box body at one side edge of the water outlet grid extends outward to form a baffle. The baffle is perpendicular to the upper plane of the upper edge and forms an acute angle with the plane where the outer wall of the side of the box body at the water outlet grid is located.

[0064] In this embodiment, the counter assembly consists of a gear train assembly and a mounting member.

[0065] The mounting member includes an upper damping rib 3, a lower clamping plate 4 and a middle clamping plate 5. The upper damping rib is connected to the impeller box assembly, the middle clamping plate is connected to the gear train assembly, and the lower clamping plate is arranged between the middle clamping plate and the upper damping rib.

[0066] The upper damping rib is provided with a connecting piece 3-1, a rib impeller hole 3-2, a reinforcing rib 3-3, a contraction groove 3-4, a rib cylindrical surface 3-5 and a damping rib 3-6.

[0067] A rib impeller hole is provided in the center of the upper damping rib, a first side of the upper damping rib is connected to a number of connecting parts, and a second side is connected to a number of radially distributed damping ribs through the cylindrical surface of the rib, the connecting part includes a supporting part and a positioning part, the supporting part is a solid smooth cylinder with a rounded rectangular cross-section, one end of the supporting part is connected to the first side of the upper damping rib, and the other end is connected to the guide slope 3-1-1 of the positioning part, the guiding slope is connected to the top surface, and the top surface is a circular plane.

[0068] The cross section of the support part of the connector is a rounded rectangle. The curved surface formed by the rounded corners 3-1-3 of the rounded rectangle on the side of the support part serves as an interference fit surface, and the edges 3-1-2 of the rounded rectangle on the corresponding plane on the side of the support part can form assembly exhaust holes, thereby facilitating interference assembly.

[0069] The positioning part of the connector is provided with a guiding slope to facilitate positioning and installation.

[0070] The design of the outer circle and inner square of the supporting part and the design of the guiding slope of the positioning part greatly facilitate the interference fit assembly between parts, avoiding the phenomenon of plastic columns breaking, being laborious, being unable to fit in, and falling off easily during assembly.

[0071] A middle plate through hole is provided in the center of the middle plate. The middle plate through hole is circular and can allow the impeller shaft to pass through.

[0072] The lower clamping plate 4 is a supporting plate for the gear. The lower clamping plate includes a circular plate with several positioning flanges 4-1 extending outward from the edge of the circular plate. The circular plate is provided with several fastening screw holes 4-2 and connecting hole 4-3. The center of the circular plate is provided with a lower plate impeller hole 4-4.

[0073] In this embodiment, four square positioning flanges are evenly distributed on the edge of the circular flat plate of the lower clamping plate, and three fastening screw holes and three connecting piece holes are provided on the circular flat plate.

[0074] The gear train assembly includes an upper plate 6 and a gear train consisting of a counter and an indicating device.

[0075] It should be noted that the gear train includes all gears, all pointers, all character wheels, all 4-8 tooth wheels, axles and 10-tooth wheels, all water meter counters and indicating device parts, and the indicating device includes a signal pointer.

[0076] The upper clamping plate is the upper positioning and fixing hole plate of the gear train.

[0077] In this embodiment, the upper clamping plate includes a conformal cavity 6-1, a positioning groove 6-2 and a central hole 6-4.

[0078] The upper clamping plate is in the shape of a hollow cylinder, which is composed of a circular plate and a cylindrical side plate 6-3. The cylindrical side plate extends from the edge of the circular plate perpendicular to the circular plate to the first end of the circular plate.

[0079] In the area surrounded by the cylindrical side plates, a conformal cavity is provided at the first end of the upper clamping plate.

[0080] It should be noted that the conformal cavity is formed in the gear train gap. The antifreeze water meter with increased ice avoidance space of the utility model achieves a reduction in the number of gears by setting a signal pointer, so that a larger gear train gap can exist in the gear train assembly. An irregular cylindrical structure is formed and extends outward from the first end of the upper splint at the gear train gap, and the other end of the cylindrical structure is connected to the middle splint to form a cavity.

[0081] The additional conformal cavity on the impeller box and the upper splint reserves space for the volume expansion and release of frozen water without increasing the complexity of the structure, thereby improving the anti-freezing ability of the water meter.

[0082] The positioning grooves are two opposite square notches arranged on the edge of the second end of the upper plate, and are used for positioning the gear train assembly when it is connected to the watch case assembly.

[0083] The center hole is arranged at the center of the first end of the upper clamping plate, and the edge of the center hole extends away from the first end of the upper clamping plate to form a cylindrical structure, which can be connected to the impeller shaft of the impeller.

[0084] The first end of the upper splint is printed with an alignment mark 6-5 and a small dial 14-1-1 corresponding to the signal pointer needle disk. The first end of the upper splint can also be printed with some other information.

[0085] The signal-transmitting pointer includes a needle dial 14-1 with a hollow cylindrical structure having a needle dial side 14-1-3 and a top surface. The top surface and the side surface form a signal generator slot 14-1-2. A small dial is provided on the top surface of the needle dial. A buckle 14-1-5 extends inward from the bottom of the needle dial side surface, and a buckle slot 14-1-4 is provided on the side edge of the buckle.

[0086] The needle disk is connected to the needle holder 14-3, and the needle holder includes a flat circular plate 14-3-2. The first side of the flat circular plate is connected to a second connecting member, and the second connecting member is an annular cylindrical shaft hole with an outer circle and an inner square. A rib edge 14-3-1 extends outward from the edge on the second side.

[0087] The needle holder is snapped into the buckle, and the signal generator is pressed against the signal generator slot by the rib edge.

[0088] In this embodiment, the signal-transmitting pointer is a pointer-type indicating device with a signal generator such as a metal sheet, a magnetic steel magnetic group, etc., including a needle disk, a signal generator and a needle holder.

[0089] A small dial is printed on the plane of the needle dial, and a needle dial side surface is arranged around the small dial. The needle dial side surface is provided with a buckle and a buckle groove.

[0090] In this embodiment, the signal generator is a demagnetized metal sheet in a semicircular shape.

[0091] The needle holder is provided with a hole column 14-3-3 with a square circular shaft hole and a flat circular plate. A circle of ribs protrudes from the flat circular plate to support the signal generator metal sheet.

[0092] It should be noted that the signal pointer has its own dial, which can eliminate a pair of synchronous gears. While reserving expansion space, it also saves parts, reduces friction resistance, and improves the metering performance of the water meter.

[0093] By embedding the metal sheet into the signal pointer, the complex structure and process of fixing the metal sheet can be eliminated, and errors in camera acquisition caused by the glow of the metal sheet during water meter inspection and calibration can be avoided, which will affect the judgment of the error in the final water value.

[0094] The following describes in detail the installation process of an antifreeze water meter with an increased freezing avoidance space according to this embodiment.

[0095] First, print the alignment mark, other information of the upper splint and the small dial on the upper plane of the upper splint and the needle dial respectively. Then place the semicircular metal sheet in the signal generator slot. Insert the flat circular plate of the needle holder into the buckle without any angle requirement. The rib edge 14-3-1 presses against the metal sheet to form the signal pointer.

[0096] Next, invert the upper plate and install the gear train. The gear shaft holes for each pointer, including the transmitter pointer, are interference-fitted over the gear shafts. The middle and lower plates are then placed in sequence and tightened with screws at the fastening screw holes. Align the connector holes with the connectors, and slowly interference-fit the upper damping rib onto the lower plate to complete the counter assembly.

[0097] Next, insert the movement gasket along the outer wall of the transparent cover side panel into the groove between the upper surface of the movement positioning boss and the lower surface of the large cylinder. Next, invert the counter assembly and insert the outer cylinder into the inner wall of the inverted transparent cover side panel. Snap the positioning square into the positioning groove until the positioning boss is completely aligned with the counter positioning groove.

[0098] Next, insert the impeller upside down into the rib plate impeller hole and the lower plate impeller hole until it reaches the center hole. Next, align the inner cylindrical surface with the rib plate cylindrical surface and install the impeller box, adjustment plate, and fastening screws onto the upper damping rib plate. Finally, align the inner cylindrical surface of the filter screen with the lower cylindrical surface and install the filter screen.

[0099] Finally, after the above-mentioned integral part is inverted and installed into the meter case 1, it is placed upright, and the anti-slip gasket is placed on the upper plane of the large cylinder. Finally, the middle cover is screwed and installed on the meter case to form the water meter base.

[0100] Example 2

[0101] This embodiment provides an antifreeze water meter with increased freezing avoidance space, including a case assembly, an impeller box assembly, a counter assembly and an installation component. It is suitable for weak antifreeze scenarios and can be used in short-term, low-intensity freezing conditions to ensure that the water meter operates normally.

[0102] When the antifreeze function is weak, the transparent cover described in Example 1 of the present invention can be replaced by the watch glass of the prior art, and then the lower structural parts of the transparent cover can be added to achieve one movement with both dry and wet uses.

[0103] In this embodiment, the integrated transparent cover is replaced by a watch glass assembly, which includes tempered glass and structural parts connected below the tempered glass.

[0104] The tempered glass of this embodiment has the same size as the large cylinder of the transparent cover in Example 1, which facilitates the switching of watch glasses of different materials without having to replace the movement.

[0105] The present invention adopts a multi-layer antifreeze design. The transparent cover structure can resist long-term and high-intensity freezing damage without affecting the water metering after freezing recovery. The conformal cavity structure can be applied to short-term and low-intensity freezing conditions to ensure that the water meter works normally. In antifreeze scenarios, the transparent cover of Example 1 can be replaced with the watch glass assembly of this embodiment.

Claims

1. A freeze-resistant water meter with increased freezing avoidance space, characterized in that: It includes an impeller box arranged in the watch case, an impeller is provided in the impeller box, a shrinkage blind hole opened downward in accordance with the shape is provided on the impeller box, the impeller box is connected to the gear box assembly through a mounting member, a transparent cover is connected to the outside of the gear box assembly, the gear box assembly includes a signal pointer with a signal generator, and the signal generator is covered inside the signal pointer.

2. The antifreeze water meter with increased freezing avoidance space according to claim 1, characterized in that: The signal-transmitting pointer is provided with a needle dial including a top surface and a side surface. The needle dial is in the shape of a hollow cylinder. A small dial is provided on the top surface of the needle dial. A buckle and a buckle groove are provided on the side edge of the buckle. The needle dial is connected to a needle holder that is clamped in the buckle. An annular cylindrical shaft hole with an outer circle and an inner square is provided in the center of the first side of the needle holder, and a convex rib is provided on the second side edge.

3. The antifreeze water meter with increased freezing avoidance space according to claim 1, characterized in that: The impeller box includes a plurality of water inlet grids arranged at intervals on the upper plane of the impeller box, and a protrusion is provided between adjacent water inlet grids. The protrusion extends upward from the upper plane of the upper edge to form a shrinkage blind hole extending upward from the bottom end of the protrusion to the inside of the protrusion.

4. The antifreeze water meter with increased freezing avoidance space according to claim 1, characterized in that: The transparent cover includes a top plate with a large cylinder and a cylindrical side plate. The large cylinder is connected to a small cylinder. The small cylinder is provided with a signal pointer collection window. The outer side of the side plate is connected to an organic movement positioning boss. The first end of the side plate is connected to the large cylinder, and the second end is provided with a plurality of counter positioning grooves. The inner side of the side plate is provided with a positioning square platform near the top plate.

5. The antifreeze water meter with increased freezing avoidance space according to claim 1, characterized in that: The inner side wall of the impeller box is a cylindrical surface, a cylindrical groove is provided in the center of the inner bottom surface of the impeller box, a top is embedded in the groove, and a plurality of radially arranged lower damping ribs are provided on the inner bottom surface of the impeller box around the groove.

6. The antifreeze water meter with increased freezing avoidance space according to claim 1, characterized in that: The mounting component includes an upper damping rib plate, a first side of which is connected to a plurality of connecting parts, a second side of which is connected to a plurality of radially distributed damping ribs, the upper damping rib plate is sequentially connected to a lower clamping plate and a middle clamping plate, the middle clamping plate is connected to one end of the gear train, and the other end of the gear train is connected to the upper clamping plate.

7. The antifreeze water meter with increased freezing avoidance space according to claim 6, characterized in that: The connecting member includes a supporting portion and a positioning portion. The supporting portion is a solid smooth cylinder with a rounded rectangular cross-section. One end of the supporting portion is connected to the first side of the damping rib, and the other end is connected to the guiding inclined surface of the positioning portion. The guiding inclined surface is connected to the top surface, and the top surface is a circular plane.

8. The antifreeze water meter with increased freezing avoidance space according to claim 1, characterized in that: The watch case is provided with a water inlet, the outer side of the impeller box is provided with a filter screen, the highest point of the water inlet is connected to the upper edge of the filter screen, and the water inlet is connected to a smooth transition arc surface that allows water to flow smoothly.

9. The antifreeze water meter with increased freezing avoidance space according to claim 1, characterized in that: An adjusting piece is provided at the bottom of the impeller box, and the adjusting piece is connected to the impeller box via a fastening screw.

10. The antifreeze water meter with increased freezing avoidance space according to any one of claims 1 to 9, characterized in that: A plurality of water outlet grids are provided on the side of the impeller box, and a baffle is connected to the edge of one side of the water outlet grid.

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