Anti-freezing water meter

Abstract

The invention discloses an anti-freezing water meter, and relates to the technical field of water meters. The water meter comprises a water meter body, water conveying pipes are fixedly installed at the water inlet end and the water outlet end of the water meter body correspondingly, water conveying control ball valves are fixedly installed at the ends, away from each other, of the two water conveying pipes correspondingly, and external connecting pipes are fixedly installed at the ends, away from each other, of the two water conveying control ball valves correspondingly; the water meter body and one ends of the two water conveying pipes are fixedly sleeved with the same heat preservation shell, and an observation hole corresponding to the position of a dial plate of the water meter body is formed in the top of the heat preservation shell. The sealing cover plate is locked on the heat preservation shell, the water meter body is subjected to heat preservation protection, meanwhile, the water conveying control ball valves at the front end and the rear end are sequentially closed, internal residual water is reduced, and the water meter body and internal pipelines are effectively prevented from being frozen and damaged; a dial plate of the water meter body can be observed through an observation transparent plate on the sealing cover plate and an observation hole in the heat preservation shell, and normal use of the water meter body is not affected.

Description

Technical Field

[0001] The invention relates to the technical field of water meters, and in particular to an antifreeze type water meter. Background Art

[0002] A water meter is an instrument for measuring water flow, most of which measure the cumulative flow of water. It is generally divided into two categories: volumetric water meters and velocity water meters. The development of water meters has a history of nearly two hundred years. When selecting the specifications of a water meter, you should first estimate the size and range of the flow rate used under normal circumstances, and then choose the water meter with the specification that is closest to the commonly used flow rate as the first choice. Currently, residential buildings usually install velocity water meters, that is, water meters with impellers inside. In cold winter, water meters will be exposed to the outside world for a long time or in buildings with insufficient thermal insulation performance. The remaining water inside will freeze, causing blockage or even damage to the pipes and water meters.

[0003] At present, the antifreeze measures for water meters are usually to wrap the water meter and pipes with insulation materials, close windows and doors to prevent cold, turn on the faucet to drip water into a line, and empty the remaining water in the water meter and pipes at night. However, the materials wrapped around the water meter and pipes are not easy to disassemble and assemble, which will affect the normal use of the water meter. Other measures require daily operation, which is relatively cumbersome. Therefore, an antifreeze type water meter is proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the current antifreeze measures for water meters usually include wrapping water meters and pipes with insulation materials for insulation, closing windows and doors to prevent cold, turning on the faucet to drip water into lines, and emptying the remaining water in the water meters and pipes at night. The materials wrapping the water meters and pipes are not easy to disassemble and assemble, which will affect the normal use of the water meters. Other measures require daily operation and are relatively cumbersome. The present invention provides an antifreeze water meter.

[0005] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions: A freeze-proof water meter comprises a water meter body, a water inlet end and a water outlet end of the water meter body are fixedly installed with water pipes, two ends of the water pipes away from each other are fixedly installed with water control ball valves, two ends of the water control ball valves away from each other are fixedly installed with external pipes, the water meter body and one end of the two water pipes are fixedly sleeved with the same heat-insulating shell, the top of the heat-insulating shell is provided with an observation hole corresponding to the dial position of the water meter body, the top of the heat-insulating shell is provided with a plurality of air holes evenly distributed along the observation hole, a hinged plate is fixedly installed on one side of the top of the heat-insulating shell, one side of the hinged plate A sealing cover plate is rotatably installed on the side, and the sealing cover plate is adapted to the heat-insulating outer shell. A locking plate is fixedly installed on the side of the sealing cover plate away from the hinge plate, and a plurality of assembly holes are opened on the top of the locking plate. An assembly plate is fixedly installed on the other side of the top of the heat-insulating outer shell, and a plurality of fixing holes are opened on the top of the assembly plate. A plurality of threaded barrels are fixedly installed inside the fixing holes, and the positions of the plurality of threaded barrels respectively correspond to the positions of the plurality of assembly holes. A loading hole is opened on the top of the sealing cover plate, and an observation transparent plate is fixedly installed inside the loading hole, and the position of the observation transparent plate corresponds to the position of the observation hole.

[0006] Furthermore, a drainage pipe connected to the water delivery pipe is fixedly installed on the top of the water delivery pipe, and a drainage control ball valve is fixedly installed on the bottom of the drainage pipe.

[0007] Furthermore, the bottom ends of the two drainage control ball valves are fixedly installed with the same water tank cover, a drainage box is placed at the bottom of the water tank cover, locking buckle plates are rotatably installed on both sides of the water tank cover, and locking seats compatible with the locking buckle plates are fixedly installed on both sides of the top of the drainage box.

[0008] Furthermore, a foam elastic sleeve is fixedly sleeved inside the drainage box.

[0009] Furthermore, a sealing knife gate valve connected to the interior of the thermal insulation shell is fixedly mounted on the side wall of the thermal insulation shell, and an exhaust pipe is fixedly mounted on one end of the sealing knife gate valve.

[0010] Furthermore, a sealing ring is fixedly installed inside the sealing cover plate, and the sealing ring is matched with the top of the heat-insulating shell. A plurality of sealing rubber blocks matched with the air holes are fixedly installed on the inner wall of the sealing cover plate.

[0011] Furthermore, a double-headed slide is fixedly installed on the side wall of the sealing cover plate, and telescopic slide rods are slidably installed inside both ends of the double-headed slide, long sliding holes are opened on the side walls of both ends of the double-headed slide, and a control rod is fixedly installed on the side wall of one end of the telescopic slide located inside the double-headed slide, and two control rods are respectively slidably installed inside the two long sliding holes, and a return spring is arranged inside the double-headed slide, and the return spring is located between the two telescopic slide rods, and two symmetrically arranged adapter tubes are fixedly installed on the top of the hinged plate, and the adapter tubes are adapted to the telescopic slide rod.

[0012] Furthermore, a first suspension plate and a second suspension plate are fixedly installed on both sides of the bottom of the thermal insulation shell, and two symmetrically arranged storage inserts are fixedly installed on the bottom of the first suspension plate, and the storage inserts are adapted to the telescopic slide rod, and two symmetrically arranged elastic claws are fixedly installed on the bottom of the second suspension plate, and the elastic claws are adapted to the locking plate.

[0013] The beneficial effects of the present invention are as follows: 1. The present invention locks the sealing cover plate on the heat-insulating shell to protect the water meter body from heat insulation, and at the same time, sequentially closes the water delivery control ball valves at the front and rear ends to reduce the residual water inside the water meter body and the water delivery pipe, effectively preventing the water meter body and its internal pipes from being damaged by freezing. When the water meter body is in a closed state, the dial of the water meter body can still be observed through the transparent plate on the sealing cover plate and the observation hole on the heat-insulating shell, without affecting the normal use of the water meter body. 2. The present invention sets a drainage pipe, so that after closing the water delivery control ball valves at the front and rear ends in sequence to reduce the residual water inside the water meter body and the water delivery pipe, the drainage control ball valves at the bottom of the two water delivery pipes can be opened to allow a small amount of rainwater remaining in the internal pipes of the water meter body and the water delivery pipe to be discharged through the drainage pipe and the drainage control ball valve, thereby ensuring that the water meter body and the water delivery pipe are emptied, further preventing the water meter body from being damaged or blocking the pipeline due to freezing, thereby affecting subsequent normal use; 3. The present invention sets a drainage box so that when the residual water is discharged through the drainage pipe and the drainage control ball valve, it will flow into the drainage box for collection, effectively preventing the residual water from flowing or dripping randomly and affecting the surrounding environment. At the same time, when there is a lot of water in the drainage box, the locking buckle plates on both sides can be rotated to disengage from the locking seat, thereby separating the locking seat from the water tank cover, clearing the water or ice accumulated in the drainage box, and completing the regular maintenance of the drainage box; 4. The present invention provides a foam elastic sleeve, so that when there is too much water in the drainage box, the temperature is low at night, and the remaining water accumulated in the drainage box freezes and expands in volume. At this time, the foam elastic sleeve sleeved inside the drainage box will automatically deform and compress under the pressure of ice, thereby providing sufficient margin space for the expansion of ice and preventing the drainage box from bursting; 5. The present invention provides a sealed knife gate valve, so that in areas with extremely low temperatures at night, after the thermal insulation shell is closed and the remaining water is discharged, a vacuum tool or device such as a vacuum cylinder or an air pump can be connected to one end of the vacuum pipe, and then the sealed knife gate valve is opened to extract most of the air inside the thermal insulation shell, and then the sealed knife gate valve is closed, thereby reducing the air content in the sealed cover plate and the internal space of the thermal insulation shell, thereby improving the thermal insulation performance of the thermal insulation shell and the sealed cover plate on the water meter body; 6. The present invention provides a sealing ring and a sealing rubber block, so that when the sealing cover plate is buckled on the top of the thermal insulation shell, the sealing ring will be synchronously sleeved on the top of the thermal insulation shell, and the elasticity of the sealing ring facilitates the sleeve connection between the sealing cover plate and the thermal insulation shell, so that the sealing cover plate and the thermal insulation shell are more closely matched, and the sealing rubber block will be respectively inserted into each vent hole. When the air inside the sealing cover plate and the thermal insulation shell is extracted, the sealing cover plate will be tightly adsorbed on the top of the thermal insulation shell with the help of the sealing ring and the sealing rubber block, effectively ensuring the sealing of the internal space of the thermal insulation shell; 7. The present invention provides a telescopic slide rod, so that the telescopic slide rod and the adapter tube are plugged and matched, so that the sealing cover plate can rotate around the adapter tube. When the temperature rises, the sealing cover plate can be reopened to connect the observation hole and the air vent on the top of the heat-insulating shell. The two control rods can also be moved to drive the two telescopic slide rods to retract into the double-head slide tube, so that the telescopic slide rod is separated from the adapter tube, and then the entire sealing cover plate is directly removed, reducing the space occupied by the sealing cover plate; 8. The present invention sets a first hanging plate and a second hanging plate so that when the seal is removed, the sealing cover plate can be buckled on the bottom of the heat-insulating shell, and the locking plate on one side of the sealing cover plate is clamped between the two elastic claws at the bottom of the second hanging plate. Then, the retracted telescopic slide rod and the double-head slide cylinder are clamped between the two storage inserts at the bottom of the first hanging plate. Then, the control rod is released to make the two telescopic slide rods respectively clamped into the inside of the two storage inserts, so that the sealing cover plate is hung and buckled on the bottom of the heat-insulating shell, and there is no need to store the sealing cover plate separately. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the water meter body and the heat-insulating shell of the present invention in the first perspective; Figure 3 It is a schematic diagram of the three-dimensional structure of the water meter body and the heat-insulating shell of the present invention in the second viewing angle; Figure 4 The present invention Figure 3 Schematic diagram of the structure at A in the middle; Figure 5 It is a schematic diagram of the three-dimensional structure of the sealing cover plate of the present invention; Figure 6The present invention Figure 5 Schematic diagram of the structure at B in the middle; Figure 7 It is a schematic diagram of the three-dimensional structure of the drainage box of the present invention; Figure 8 It is a schematic diagram of the internal three-dimensional structure of the drainage box of the present invention; 1. Water meter body; 2. Water pipe; 3. Water control ball valve; 4. External pipe; 5. Insulated shell; 501. Observation hole; 502. Air vent; 6. Hinge plate; 7. Sealing cover plate; 8. Locking plate; 801. Assembly hole; 9. Assembly plate; 10. Threaded cylinder; 11. Observation transparent plate; 12. Drain pipe; 13. Drain control ball valve; 14. Water tank cover plate; 15. Drain box; 16. Locking buckle plate; 17. Locking seat; 18. Foam elastic sleeve; 19. Sealing knife gate valve; 20. Exhaust pipe; 21. Sealing ring; 22. Sealing rubber block; 23. Double-headed slide cylinder; 2301. Long slide hole; 24. Telescopic slide rod; 25. Control rod; 26. Adapter cylinder; 27. First hanging plate; 28. Storage plug cylinder; 29. ​​Second hanging plate; 30. Elastic claw. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0016] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0017] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0018] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0019] like Figures 1 to 8 As shown, an antifreeze type water meter includes a water meter body 1, as shown Figure 1 As shown, the water inlet and outlet ends of the water meter body 1 are fixedly installed with water pipes 2, and the ends of the two water pipes 2 away from each other are fixedly installed with water control ball valves 3, and the ends of the two water control ball valves 3 away from each other are fixedly installed with external pipes 4, as shown in FIG. Figure 2 As shown, the water meter body 1 and one end of the two water pipes 2 are fixedly sleeved with the same insulation shell 5, the top of the insulation shell 5 is provided with an observation hole 501 corresponding to the dial position of the water meter body 1, and the top of the insulation shell 5 is provided with a plurality of air holes 502 evenly distributed along the observation hole 501, a hinge plate 6 is fixedly installed on one side of the top of the insulation shell 5, a sealing cover plate 7 is rotatably installed on one side of the hinge plate 6, the sealing cover plate 7 is adapted to the insulation shell 5, and a locking plate 8 is fixedly installed on the side of the sealing cover plate 7 away from the hinge plate 6, as shown in FIG. Figure 5 As shown, a plurality of assembly holes 801 are provided on the top of the locking plate 8. Figure 4 As shown, a mounting plate 9 is fixedly installed on the other side of the top of the heat-insulating shell 5. A plurality of fixing holes are opened on the top of the mounting plate 9. A plurality of threaded cylinders 10 are fixedly installed inside the fixing holes. Figure 2As shown, the positions of the plurality of threaded barrels 10 correspond to the positions of the plurality of assembly holes 801, respectively. A loading hole is provided on the top of the sealing cover plate 7, and an observation transparent plate 11 is fixedly installed inside the loading hole. The position of the observation transparent plate 11 corresponds to the position of the observation hole 501. Specifically, when the antifreeze type water meter is in use, if it is necessary to keep the water meter body 1 warm at night, the sealing cover plate 7 on one side of the insulation shell 5 can be turned over to the top of the insulation shell 5, so that the sealing cover plate 7 is buckled on the top of the insulation shell 5 for sealing. At this time, the locking plate 8 is located at the top of the assembly plate 9, and the plurality of assembly holes 801 correspond to the plurality of threaded barrels 10, respectively. The fixing bolts pass through the assembly holes 801 in sequence and are screwed into the inside of the threaded barrel 10, locking the sealing cover plate 7 on the heat-insulating shell 5, so that the water meter body 1 is in a closed space surrounded by the heat-insulating shell 5 and the sealing cover plate 7, thereby the water meter body 1 is heat-insulated and protected, and at the same time, the water delivery control ball valves 3 at the front and rear ends are closed in sequence to reduce the residual water inside the water meter body 1 and the water delivery pipe 2, effectively preventing the water meter body 1 and its internal pipes from being damaged by freezing, and when the water meter body 1 is in a closed state, the dial of the water meter body 1 can still be observed through the transparent plate 11 on the sealing cover plate 7 and the observation hole 501 on the heat-insulating shell 5, without affecting the normal use of the water meter body 1.

[0020] like Figure 3 As shown, a drainage pipe 12 connected to the water pipe 2 is fixedly installed on the top of the water pipe 2. Figure 7 As shown, a drainage control ball valve 13 is fixedly installed at the bottom of the drainage pipe 12; specifically, by setting the drainage pipe 12, when the water supply control ball valves 3 at the front and rear ends are closed in sequence to reduce the residual water inside the water meter body 1 and the water supply pipe 2, the drainage control ball valves 13 at the bottom of the two water supply pipes 2 can also be opened, so that a small amount of rainwater remaining in the internal pipeline of the water meter body 1 and the water supply pipe 2 can be discharged through the drainage pipe 12 and the drainage control ball valve 13, thereby ensuring that the water meter body 1 and the water supply pipe 2 are emptied, and further preventing the water meter body 1 from freezing and causing damage to components or blocking of pipelines, affecting subsequent normal use.

[0021] like Figure 7As shown, the bottom ends of the two drainage control ball valves 13 are fixedly installed with the same water tank cover 14, and a drainage box 15 is placed at the bottom of the water tank cover 14. Locking buckles 16 are rotatably installed on both sides of the water tank cover 14, and locking seats 17 compatible with the locking buckle plates 16 are fixedly installed on both sides of the top of the drainage box 15; specifically, by setting up the drainage box 15, when the remaining water is discharged through the drainage pipe 12 and the drainage control ball valve 13, it will flow into the drainage box 15 for collection, effectively preventing the remaining water from flowing or dripping and affecting the surrounding environment. At the same time, when the water stored in the drainage box 15 is relatively large, the locking buckle plates 16 on both sides can be rotated to disengage from the locking seat 17, thereby separating the locking seat 17 from the water tank cover 14, and removing the water or ice accumulated in the drainage box 15, thereby completing the regular maintenance of the drainage box 15.

[0022] like Figure 8 As shown, the interior of the drainage box 15 is fixedly sleeved with a foam elastic sleeve 18; specifically, by arranging the foam elastic sleeve 18, when too much water is stored in the drainage box 15 and the temperature is low at night, the remaining water stored in the drainage box 15 will freeze and expand in volume. At this time, the foam elastic sleeve 18 sleeved inside the drainage box 15 will automatically deform and compress under the squeeze of the ice cubes, thereby providing sufficient margin space for the expansion of the ice cubes and preventing the drainage box 15 from bursting.

[0023] like Figure 4 As shown, a sealed knife gate valve 19 connected to the interior of the thermal insulation shell 5 is fixedly installed on the side wall of the thermal insulation shell 5, and an exhaust pipe 20 is fixedly installed at one end of the sealed knife gate valve 19; specifically, by arranging the sealed knife gate valve 19, in areas with extremely low temperatures at night, after closing the thermal insulation shell 5 and discharging the remaining water, an exhaust tool or equipment such as an exhaust cylinder or an air pump is connected to one end of the exhaust pipe 20, and then the sealed knife gate valve 19 is opened to extract most of the air inside the thermal insulation shell 5, and then the sealed knife gate valve 19 is closed, thereby reducing the air content in the internal space of the sealing cover plate 7 and the thermal insulation shell 5, thereby improving the thermal insulation performance of the thermal insulation shell 5 and the sealing cover plate 7 on the water meter body 1.

[0024] like Figure 5As shown, a sealing ring 21 is fixedly installed inside the sealing cover plate 7, and the sealing ring 21 is matched with the top of the heat-insulating shell 5. A plurality of sealing rubber blocks 22 matched with the air vents 502 are fixedly installed on the inner wall of the sealing cover plate 7; specifically, by arranging the sealing ring 21 and the sealing rubber block 22, when the sealing cover plate 7 is buckled on the top of the heat-insulating shell 5, the sealing ring 21 will be synchronously sleeved on the top of the heat-insulating shell 5, and the elasticity of the sealing ring 21 facilitates the sleeve connection of the sealing cover plate 7 and the heat-insulating shell 5, so that the sealing cover plate 7 and the heat-insulating shell 5 are more closely matched, and at the same time, the plurality of sealing rubber blocks 22 will be respectively inserted into each air vent 502, and when the air inside the sealing cover plate 7 and the heat-insulating shell 5 is extracted, the sealing cover plate 7 will be tightly adsorbed on the top of the heat-insulating shell 5 with the help of the sealing ring 21 and the sealing rubber block 22, effectively ensuring the sealing of the internal space of the heat-insulating shell 5.

[0025] like Figure 6 As shown, a double-headed slide 23 is fixedly installed on the side wall of the sealing cover plate 7, and telescopic slide rods 24 are slidably installed inside both ends of the double-headed slide 23. Long sliding holes 2301 are opened on the side walls of both ends of the double-headed slide 23. A control rod 25 is fixedly installed on the side wall of one end of the telescopic slide 24 located inside the double-headed slide 23. The two control rods 25 are slidably installed inside the two long sliding holes 2301 respectively. A return spring is arranged inside the double-headed slide 23, and the return spring is located between the two telescopic slide rods 24. Figure 2 As shown, two symmetrically arranged adapter tubes 26 are fixedly installed on the top of the hinged plate 6, and the adapter tube 26 is adapted to the telescopic slide rod 24; specifically, by arranging the telescopic slide rod 24, the telescopic slide rod 24 and the adapter tube 26 are plugged in and matched, so that the sealing cover plate 7 can rotate around the adapter tube 26. When the temperature rises, the sealing cover plate 7 can be reopened to connect the observation hole 501 and the air vent 502 on the top of the thermal insulation shell 5. The two control rods 25 can also be moved to drive the two telescopic slide rods 24 to retract into the interior of the double-head slide rod 23, so that the telescopic slide rod 24 is separated from the adapter tube 26, and then the entire sealing cover plate 7 is directly removed to reduce the space occupied by the sealing cover plate 7.

[0026] like Figure 3As shown, the first hanging plate 27 and the second hanging plate 29 are fixedly installed on both sides of the bottom of the heat-insulating shell 5, and two symmetrically arranged storage inserts 28 are fixedly installed at the bottom of the first hanging plate 27. The storage inserts 28 are adapted to the telescopic slide rod 24, and two symmetrically arranged elastic claws 30 are fixedly installed at the bottom of the second hanging plate 29. The elastic claws 30 are adapted to the locking plate 8; specifically, by setting the first hanging plate 27 and the second hanging plate 29, when the sealing cover plate 7 is removed to reduce the occupied space, The sealing cover plate 7 can be buckled on the bottom of the heat-insulating shell 5, so that the locking plate 8 on one side of the sealing cover plate 7 is clamped between the two elastic claws 30 at the bottom of the second hanging plate 29, and then the retracted telescopic slide rod 24 and the double-head slide cylinder 23 are clamped between the two storage inserts 28 at the bottom of the first hanging plate 27, and then the control rod 25 is released to make the two telescopic slide rods 24 respectively clamped into the inside of the two storage inserts 28, so that the sealing cover plate 7 is hung and buckled on the bottom of the heat-insulating shell 5, and there is no need to store the sealing cover plate 7 separately.

[0027] In summary: when the antifreeze water meter is in use, if it is necessary to keep the water meter body 1 warm at night, the sealing cover plate 7 on one side of the insulation shell 5 can be flipped to the top of the insulation shell 5, so that the sealing cover plate 7 is buckled on the top of the insulation shell 5 for sealing. At this time, the locking plate 8 is located at the top of the assembly plate 9, and the multiple assembly holes 801 correspond to the multiple threaded tubes 10 respectively. The fastening bolts are passed through the assembly holes 801 in turn and screwed into the inside of the threaded tube 10, and the sealing cover plate 7 is locked on the insulation shell 5, so that the water meter body 1 is in the enclosed space surrounded by the insulation shell 5 and the sealing cover plate 7, so that the water meter body 1 is protected by insulation, and at the same time, the water supply control ball valves 3 at the front and rear ends are closed in turn to reduce the residual water inside the water meter body 1 and the water supply pipe 2, effectively The water meter body 1 and its internal pipes are prevented from being damaged by freezing. When the water meter body 1 is in a closed state, the dial of the water meter body 1 can still be observed through the transparent plate 11 on the sealing cover plate 7 and the observation hole 501 on the heat-insulating shell 5, without affecting the normal use of the water meter body 1. By setting the drain pipe 12, when the water supply control ball valves 3 at the front and rear ends are closed in turn to reduce the residual water inside the water meter body 1 and the water supply pipe 2, the drain control ball valves 13 at the bottom of the two water supply pipes 2 can be opened to allow a small amount of rainwater remaining in the internal pipes of the water meter body 1 and the water supply pipe 2 to be discharged through the drain pipe 12 and the drain control ball valve 13, thereby ensuring that the water meter body 1 and the water supply pipe 2 are emptied, and further preventing the components of the water meter body 1 from being damaged due to freezing. Or block the pipeline, affecting the subsequent normal use. By setting up the drainage box 15, when the remaining water is discharged through the drainage pipe 12 and the drainage control ball valve 13, it will flow into the drainage box 15 for collection, effectively preventing the remaining water from flowing or dripping and affecting the surrounding environment. At the same time, when there is a lot of water in the drainage box 15, the locking buckle plates 16 on both sides can be rotated to disengage from the locking seat 17, so that the locking seat 17 is separated from the water tank cover 14, and the water or ice accumulated in the drainage box 15 is removed, completing the regular maintenance of the drainage box 15. By setting the foam elastic sleeve 18, when there is too much water in the drainage box 15, the temperature is low at night, and the remaining water accumulated in the drainage box 15 will freeze and expand in volume. At this time, the foam elastic sleeve 18 connected inside the drainage box 15 The sleeve 18 will automatically deform and compress under the pressure of ice cubes, thereby providing sufficient margin space for the expansion of ice cubes and preventing the drainage box 15 from being burst. By setting the sealing knife gate valve 19, in areas with extremely low temperature at night, after closing the thermal insulation shell 5 and draining the remaining water, one end of the exhaust pipe 20 can be connected to an exhaust tool or equipment such as an exhaust cylinder or an air pump, and then the sealing knife gate valve 19 is opened to extract most of the air inside the thermal insulation shell 5, and then the sealing knife gate valve 19 is closed, thereby reducing the air content in the internal space of the sealing cover plate 7 and the thermal insulation shell 5, thereby improving the thermal insulation performance of the thermal insulation shell 5 and the sealing cover plate 7 on the water meter body 1. By setting the sealing ring 21 and the sealing rubber block 22, when the sealing cover plate 7 is buckled on the top of the thermal insulation shell 5,The sealing ring 21 will be synchronously sleeved on the top of the heat-insulating shell 5, and the elasticity of the sealing ring 21 facilitates the sleeve connection of the sealing cover plate 7 and the heat-insulating shell 5, so that the sealing cover plate 7 and the heat-insulating shell 5 are more closely matched. At the same time, multiple sealing rubber blocks 22 will be respectively inserted into each ventilation hole 502. When the air inside the sealing cover plate 7 and the heat-insulating shell 5 is extracted, the sealing cover plate 7 will be tightly adsorbed on the top of the heat-insulating shell 5 with the help of the sealing ring 21 and the sealing rubber block 22, effectively ensuring the sealing of the internal space of the heat-insulating shell 5. By setting the telescopic slide rod 24, the telescopic slide rod 24 is plugged into the adapter tube 26, so that the sealing cover plate 7 can rotate around the adapter tube 26. When the temperature rises, the sealing cover plate 7 can be reopened to connect the observation hole 501 and the ventilation hole 502 on the top of the heat-insulating shell 5. The two control rods 25 can also be toggled to make It drives the two telescopic slide bars 24 to retract into the inside of the double-head slide tube 23, so that the telescopic slide bars 24 are separated from the adapter tube 26, and then the entire sealing cover plate 7 is directly removed to reduce the space occupied by the sealing cover plate 7. By setting the first hanging plate 27 and the second hanging plate 29, when the sealing cover plate 7 is removed to reduce the space occupied, the sealing cover plate 7 can be buckled to the bottom of the heat-insulating shell 5, so that the locking plate 8 on one side of the sealing cover plate 7 is clamped between the two elastic claws 30 at the bottom of the second hanging plate 29, and then the telescopic slide bars 24 and the double-head slide tube 23 in the retracted state are clamped between the two storage inserts 28 at the bottom of the first hanging plate 27, and then the control rod 25 is released to make the two telescopic slide bars 24 respectively clamped into the inside of the two storage inserts 28, so that the sealing cover plate 7 is hung and buckled at the bottom of the heat-insulating shell 5, and there is no need to store the sealing cover plate 7 separately.

[0028] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. An antifreeze water meter, characterized in that: The invention comprises a water meter body (1), wherein a water pipe (2) is fixedly mounted on the water inlet and the water outlet of the water meter body (1), a water control ball valve (3) is fixedly mounted on the ends of the two water pipes (2) which are away from each other, an external pipe (4) is fixedly mounted on the ends of the two water control ball valves (3) which are away from each other, a same heat-insulating shell (5) is fixedly sleeved on the water meter body (1) and one end of the two water pipes (2), an observation hole (501) corresponding to the dial position of the water meter body (1) is provided on the top of the heat-insulating shell (5), a plurality of air holes (502) evenly distributed along the observation hole (501) are provided on the top of the heat-insulating shell (5), a hinged plate (6) is fixedly mounted on one side of the top of the heat-insulating shell (5), and one side of the hinged plate (6) is rotatably mounted. A sealing cover plate (7) is provided, the sealing cover plate (7) being adapted to the heat-insulating outer shell (5); a locking plate (8) is fixedly mounted on one side of the sealing cover plate (7) away from the hinge plate (6); a plurality of assembly holes (801) are provided on the top of the locking plate (8); an assembly plate (9) is fixedly mounted on the other side of the top of the heat-insulating outer shell (5); a plurality of fixing holes are provided on the top of the assembly plate (9); a plurality of threaded barrels (10) are fixedly mounted inside the fixing holes; the positions of the plurality of threaded barrels (10) respectively correspond to the positions of the plurality of assembly holes (801); a loading hole is provided on the top of the sealing cover plate (7); an observation transparent plate (11) is fixedly mounted inside the loading hole; the position of the observation transparent plate (11) corresponds to the position of the observation hole (501).

2. The antifreeze water meter according to claim 1, characterized in that: A drainage pipe (12) connected to the water delivery pipe (2) is fixedly mounted on the top of each water delivery pipe (2), and a drainage control ball valve (13) is fixedly mounted on the bottom of each drainage pipe (12).

3. The antifreeze water meter according to claim 2, characterized in that: The bottom ends of the two drainage control ball valves (13) are fixedly mounted with a same water tank cover plate (14), a drainage box (15) is placed at the bottom of the water tank cover plate (14), locking buckle plates (16) are rotatably mounted on both sides of the water tank cover plate (14), and locking seats (17) adapted to the locking buckle plates (16) are fixedly mounted on both sides of the top of the drainage box (15).

4. The antifreeze water meter according to claim 3, characterized in that: A foam elastic sleeve (18) is fixedly sleeved inside the drainage box (15).

5. The antifreeze water meter according to claim 1, characterized in that: A sealing knife gate valve (19) connected to the interior of the thermal insulation shell (5) is fixedly mounted on the side wall of the thermal insulation shell (5), and an exhaust pipe (20) is fixedly mounted on one end of the sealing knife gate valve (19).

6. The antifreeze water meter according to claim 1, characterized in that: A sealing ring (21) is fixedly mounted inside the sealing cover plate (7), the sealing ring (21) being compatible with the top of the heat-insulating outer shell (5), and a plurality of sealing rubber blocks (22) compatible with the air holes (502) are fixedly mounted on the inner wall of the sealing cover plate (7).

7. The antifreeze water meter according to claim 1, characterized in that: A double-headed slide cylinder (23) is fixedly mounted on the side wall of the sealing cover plate (7), and telescopic slide rods (24) are slidably mounted inside both ends of the double-headed slide cylinder (23). Long sliding holes (2301) are opened on the side walls at both ends of the double-headed slide cylinder (23), and a control rod (25) is fixedly mounted on the side wall of one end of the telescopic slide rod (24) located inside the double-headed slide cylinder (23). The two control rods (25) are respectively slidably mounted inside the two long sliding holes (2301). A return spring is arranged inside the double-headed slide cylinder (23), and the return spring is located between the two telescopic slide rods (24). Two symmetrically arranged adapter cylinders (26) are fixedly mounted on the top of the hinged plate (6), and the adapter cylinder (26) is adapted to the telescopic slide rod (24).

8. The antifreeze water meter according to claim 7, characterized in that: A first suspension plate (27) and a second suspension plate (29) are fixedly mounted on both sides of the bottom of the heat-insulating outer shell (5), respectively; two symmetrically arranged storage inserts (28) are fixedly mounted on the bottom of the first suspension plate (27), and the storage inserts (28) are matched with the telescopic slide rod (24); and two symmetrically arranged elastic claws (30) are fixedly mounted on the bottom of the second suspension plate (29), and the elastic claws (30) are matched with the locking plate (8).

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