Waterproof liquid seal non-magnetic remote water meter
The double sealing structure, which combines a stepped wedge-shaped sealing seat with a sealing ring and a compensating spring, solves the problem of sealing failure caused by environmental changes and vibration in remote water meters, and achieves reliable sealing and long-term stable operation in humid environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO JINHAI INSTR CO LTD
- Filing Date
- 2025-12-17
- Publication Date
- 2026-08-04
AI Technical Summary
Existing remote water meters cannot maintain good waterproof performance for a long time due to factors such as changes in ambient temperature, thermal expansion and contraction of materials, and vibration of water supply networks, which can cause sealing failure in humid environments such as outdoors or underground.
The double sealing structure, which combines a stepped wedge-shaped sealing seat with a sealing ring, along with a compensating spring, forms a self-locking effect and a dynamic constant pressure seal, ensuring that the sealing ring maintains sufficient sealing pressure during long-term use.
It significantly improves the sealing reliability and service life of water meters in humid and immersion environments, prevents the intrusion of moisture, dust and corrosive media, and is suitable for the high protection requirements of smart water systems.
Smart Images
Figure CN224594022U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of liquid-sealed non-magnetic remote water meter, specifically a waterproof liquid-sealed non-magnetic remote water meter. Background Technology
[0002] With the development of smart water systems, remote water meters are widely used in urban water supply metering and remote meter reading scenarios. To ensure the accuracy of data collection and the stability of long-term equipment operation, the remote module must have good waterproof performance. In particular, in humid or water-immersed environments such as outdoors and underground, higher requirements are placed on the sealing reliability of the water meter housing connection parts.
[0003] Existing remote water meters typically use ordinary rubber gaskets and bolts to achieve a seal between the casing and the body.
[0004] The existing structure relies solely on the initial assembly pre-tightening force to maintain the seal, which cannot cope with the thermal expansion and contraction of materials caused by changes in ambient temperature, the loosening of connections caused by vibration of the water supply network, and the creep phenomenon of the rubber gasket itself under continuous compression during long-term use. These factors will gradually weaken the contact pressure of the sealing interface, causing the seal to fail and allowing moisture to seep into the remote transmission device along the connection gap. Therefore, a utility model is proposed to address the above problems. Utility Model Content
[0005] In order to overcome the shortcomings of the existing technology and solve at least one of the technical problems mentioned in the background technology, this utility model proposes a waterproof liquid-sealed non-magnetic remote water meter.
[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: The waterproof liquid-sealed non-magnetic remote water meter of this utility model includes a water meter body, a liquid-sealed non-magnetic remote transmission device housing is provided on the top of the water meter body, a waterproof component is provided at the top of the water meter body, and the liquid-sealed non-magnetic remote transmission device housing is sealed to the water meter body through the waterproof component.
[0007] Preferably, the waterproof component includes a stepped wedge-shaped sealing seat, and a plurality of connecting ears are fixedly provided on the outer side of the stepped wedge-shaped sealing seat, with connecting holes opened at the top of the connecting ears.
[0008] Preferably, the stepped wedge-shaped sealing seat is fixedly installed at the top of the water meter body, and the top of the stepped wedge-shaped sealing seat is provided with several fixing screw holes.
[0009] Preferably, a sealing ring is movably provided at the top of the stepped wedge-shaped sealing seat, and a mating groove is provided at the bottom of the sealing ring.
[0010] Preferably, the stepped wedge-shaped sealing seat is movably disposed inside the mating groove, and the top of the sealing ring has a fixing hole, the bottom of the fixing hole penetrates the sealing ring.
[0011] Preferably, the fixing hole corresponds to the fixing screw hole, the fixing hole has an installation hole inside, and the installation hole has a compensation spring inside.
[0012] Preferably, the top end of the compensating spring is fixedly disposed at the top end of the mounting hole, and the bottom end of the compensating spring is fixedly disposed at the bottom end of the mounting hole.
[0013] Preferably, the inside of the docking groove is provided with several anti-slip textures.
[0014] The beneficial effects of this utility model are: 1. This utility model provides a waterproof liquid-sealed non-magnetic remote water meter. The housing of the liquid-sealed non-magnetic remote transmission device achieves a reliable sealed connection with the water meter body through a waterproof component, which has significant beneficial effects. The waterproof component adopts a double sealing structure with a stepped wedge-shaped sealing seat and a sealing ring. The wedge-shaped contour generates a self-locking effect when pressed, which greatly improves the tightness of the sealing interface. The bottom of the sealing ring is provided with a mating groove that matches the sealing seat, and its inner wall is provided with anti-slip texture, which effectively prevents relative displacement caused by vibration and temperature change during assembly or use. More importantly, the sealing ring integrates a compensation spring, which is pre-compressed when the housing presses the ring, and continuously provides elastic reaction force. This reaction force not only ensures sufficient initial sealing pressure, but also automatically compensates for the pre-tightening force attenuation caused by temperature changes, mechanical vibration or rubber creep during long-term operation, so as to achieve dynamic constant pressure sealing.
[0015] 2. This utility model provides a waterproof liquid-sealed non-magnetic remote water meter. The housing is quickly fixed by connecting ears and bolts, which is convenient to install and distributes the force evenly, avoiding local stress concentration. The overall structure effectively prevents water, dust and corrosive media from entering the electronic module, significantly improving the reliability and service life of the water meter in harsh environments such as humidity and immersion. It is suitable for high protection requirements of smart water systems. Attached Figure Description
[0016] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a perspective view of the overall structure of this utility model; Figure 2 This is a perspective view of the stepped wedge-shaped sealing seat structure of this utility model; Figure 3 This is a perspective view of the housing of the liquid-sealed non-magnetic remote transmission device in this utility model; Figure 4 This is a three-dimensional cross-sectional view of the stepped wedge-shaped sealing seat structure of this utility model; Figure 5This is a schematic diagram of the sealing ring structure in this utility model.
[0017] Legend: 1. Water meter body; 2. Liquid-sealed non-magnetic remote transmission device housing; 3. Waterproof components; 301. Stepped wedge-shaped sealing seat; 302. Connecting lug; 303. Connecting hole; 304. Fixing thread hole; 305. Sealing ring; 306. Butt groove; 307. Fixing hole; 308. Mounting hole; 309. Compensating spring; 310. Anti-slip texture. Detailed Implementation
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0019] Specific implementation examples are given below.
[0020] Please see Figures 1-5 This utility model provides a waterproof liquid-sealed non-magnetic remote water meter, including a water meter body 1, a liquid-sealed non-magnetic remote transmission device housing 2, and a waterproof component 3 disposed between the two. The water meter body 1 is a conventional mechanical water meter structure, which has a metering mechanism (such as an impeller and a transmission gear set) inside to measure the amount of water flowing through the pipe. An installation interface is opened at the top of the water meter body 1 for connecting a remote transmission module. The liquid-sealed non-magnetic remote transmission device housing 2 is disposed above the water meter body 1. It integrates a non-magnetic sampling sensor (such as a photoelectric encoder or a capacitive sensing unit) and a signal processing circuit inside, which is used to collect metering data in a non-contact manner and transmit the data to the meter reading system wirelessly or via wire. The housing 2 is filled with a sealing liquid (such as silicone oil) to form a liquid-sealed structure to isolate external moisture from corroding electronic components.
[0021] Crucially, the waterproof component 3 is fixedly installed at the top of the water meter body 1 and serves as a connection and sealing medium between the liquid-sealed non-magnetic remote transmission device housing 2 and the water meter body 1. The waterproof component 3 includes a stepped wedge-shaped sealing seat 301, which is integrally formed from engineering plastic or stainless steel. Its lower part is embedded and fixed in the installation interface at the top of the water meter body 1, and its upper part is stepped and extends outward to form a wedge-shaped platform. Several connecting ears 302 are evenly distributed on the outer periphery of the stepped wedge-shaped sealing seat 301. Each connecting ear 302 has a connecting hole 303 at its top. During assembly, the liquid-sealed non-magnetic remote transmission device housing 2 is connected to the corresponding threaded hole on the water meter body 1 by bolts passing through the connecting hole 303, thereby achieving a stable installation of the housing 2.
[0022] Furthermore, a number of fixing screw holes 304 are provided on the top end face of the stepped wedge-shaped sealing seat 301 for fixing with the upper sealing structure. A sealing ring 305 is movably fitted on the upper part of the sealing seat 301. The sealing ring 305 is made of hydrolysis-resistant and aging-resistant EPDM rubber or silicone rubber. A mating groove 306 is provided at the center of the bottom end of the sealing ring 305. The shape of the mating groove 306 matches the upper contour of the stepped wedge-shaped sealing seat 301, so that the sealing seat 301 can be tightly embedded in the mating groove 306 to form the first radial and axial seal. To enhance the anti-slip performance of the sealing interface, a number of annular or grid-like anti-slip textures 310 are provided on the inner wall of the mating groove 306 to effectively prevent the sealing ring 305 from rotating or shifting relative to each other during assembly or use.
[0023] A through fixing hole 307 is provided at the top of the sealing ring 305 corresponding to the fixing screw hole 304. Each fixing hole 307 has a mounting hole 308 coaxially arranged inside. The mounting hole 308 is a blind hole structure, and its depth is less than the total height of the fixing hole 307. A compensation spring 309 is provided in the mounting hole 308. The compensation spring 309 is a cylindrical helical compression spring. Its top end is fixedly connected to the top inner wall of the mounting hole 308, and its bottom end is fixedly connected to the bottom inner wall of the mounting hole 308 (the two ends can be fixed by adhesive, snap-on or pre-embedding).
[0024] During operation, the setting of the compensation spring 309 in this utility model is a key technical feature for achieving long-term reliable sealing. Specifically, when the housing 2 of the liquid-sealed non-magnetic remote transmission device passes through the connecting hole 303 on the connecting lug 302 with a bolt and is pressed down against the upper end face of the sealing ring 305, the sealing ring 305 is axially compressed, and the mating groove 306 at its bottom end tightly covers the upper contour of the stepped wedge-shaped sealing seat 301. At the same time, the compensation spring 309 located in the mounting hole 308 in the fixing hole 307 inside the sealing ring 305 is also pre-compressed synchronously.
[0025] The compensating spring 309 is a small helical compression spring with high fatigue life, usually made of stainless steel (such as SUS304 or SUS316) or phosphor bronze, which has excellent corrosion resistance and elastic stability. Its two ends are firmly fixed to the top and bottom inner walls of the mounting hole 308 (which can be achieved by interference fit, laser spot welding or embedded slot structure) to ensure that it will not shift or fall off during compression. In the initial assembly state, the compensating spring 309 has been compressed to the design working height, generating a constant upward elastic reaction force. This reaction force is transmitted to the contact interface between the sealing ring 305 and the stepped wedge-shaped sealing seat 301 through the sealing ring 305, thereby forming a continuous and uniform sealing pressure.
[0026] This elastic reaction mechanism has a dual function: First, under static conditions, it ensures that the sealing ring 305 always fits the surface of the stepped wedge-shaped sealing seat 301 with sufficient compression. Even when there are minor manufacturing tolerances or assembly deviations between the water meter body 1 and the remote transmission housing 2, the spring's adaptive adjustment capability can fill the gap, eliminating the risk of water seeping into the radial or axial gaps. Second, in dynamic or long-term use environments, this structure can effectively cope with various factors that lead to deterioration of sealing performance.
[0027] For example, in outdoor environments with large temperature differences between day and night, the relative displacement of various components of the water meter due to different coefficients of thermal expansion and contraction may cause the sealing rings under traditional rigid connections to loosen; in areas where water supply networks vibrate frequently, the bolt preload may gradually decrease due to fretting wear; and the sealing rings themselves may undergo material creep (stress relaxation) under long-term pressure, resulting in a decrease in resilience. All of these situations will weaken the contact pressure at the sealing interface, thereby causing potential leakage risks.
[0028] The compensating spring 309 in this invention can actively "sense" and compensate for these changes: when the sealing ring 305 shrinks due to temperature drop, loosens due to vibration, or experiences a reduction in compression due to material creep, the compensating spring 309 will automatically release some of its stored elastic potential energy, pushing the sealing ring 305 to re-press the stepped wedge-shaped sealing seat 301, thereby dynamically maintaining the required sealing specific pressure. This "self-compensation" mechanism significantly extends the effective life of the sealing system and avoids the problem of frequent repairs due to seal failure in traditional structures. In addition, since the compensating spring 309 is completely built into the mounting hole 308 of the sealing ring 305 and is not exposed to water or the external environment, it will not be affected by water flow erosion, impurity corrosion, or human interference, ensuring its long-term reliability.
[0029] First, the waterproof component 3 adopts a double sealing structure with a stepped wedge-shaped sealing seat 301 and a sealing ring 305, which effectively improves the sealing performance of the connection interface. The stepped wedge-shaped sealing seat 301 is fixedly installed at the top of the water meter body 1. Its unique stepped and wedge-shaped contour not only enhances the structural rigidity, but also generates a self-locking effect during axial compression, so that the sealing ring 305 is more tightly wrapped around the sealing seat surface when under pressure, significantly reducing the possibility of water penetrating radially or axially.
[0030] Secondly, the mating groove 306 at the bottom of the sealing ring 305 precisely matches the stepped wedge-shaped sealing seat 301, forming an enclosed fitting structure. Simultaneously, several anti-slip grooves 310 on the inner wall of the mating groove 306 increase the frictional resistance between the sealing ring and the sealing seat, effectively preventing relative displacement or torsion of the sealing ring 305 due to vibration or thermal expansion and contraction during assembly, transportation, or use, thereby avoiding seal failure.
[0031] Furthermore, this invention innovatively incorporates an installation hole 308 inside the fixing hole 307 of the sealing ring 305, and integrates a compensation spring 309 therein. When the housing 2 of the liquid-sealed non-magnetic remote transmission device presses the sealing ring 305 with bolts through the connecting hole 303 on the connecting lug 302, the compensation spring 309 is pre-compressed and continuously provides elastic reaction force. This reaction force not only ensures sufficient clamping force at the sealing interface in the initial assembly state, but more importantly, it can automatically compensate for the pre-tightening force attenuation caused by temperature changes, mechanical vibration, or creep of rubber materials during long-term operation, achieving "dynamic constant pressure sealing," which greatly improves the product's environmental adaptability and service life under complex working conditions.
[0032] In addition, the connection ear 302 and the connection hole 303 enable the housing 2 of the liquid-sealed non-magnetic remote transmission device to be quickly and securely connected to the water meter body 1 using standard fasteners, which facilitates on-site installation and subsequent maintenance. The corresponding arrangement of the fixing screw hole 304 and the fixing hole 307 ensures the uniformity of the force on the sealing ring 305 during the tightening process, avoiding local stress concentration that could cause deformation or tearing of the ring.
[0033] In summary, through the systematic design of the waterproof component 3, the liquid-sealed non-magnetic remote transmission device housing 2 and the water meter body 1 not only achieve a high level of static sealing, but also have excellent dynamic sealing retention capability, effectively preventing external moisture, dust and corrosive media from intruding into the remote transmission electronic module, ensuring long-term stable operation of the non-magnetic sensing unit and signal processing circuit in harsh environments such as humid, water-immersed and even underground well chambers.
[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.
Claims
1. A waterproof liquid-sealed non-magnetic remote water meter, characterized in that: The device includes a water meter body (1), a liquid-sealed non-magnetic remote transmission device housing (2) is provided on the top of the water meter body (1), a waterproof component (3) is provided on the top of the water meter body (1), and the liquid-sealed non-magnetic remote transmission device housing (2) is sealed to the water meter body (1) through the waterproof component (3).
2. The waterproof liquid-sealed non-magnetic remote water meter according to claim 1, characterized in that: The waterproof component (3) includes a stepped wedge-shaped sealing seat (301), and a plurality of connecting ears (302) are fixedly provided on the outer side of the stepped wedge-shaped sealing seat (301). A connecting hole (303) is provided at the top of the connecting ears (302).
3. The waterproof liquid-sealed non-magnetic remote water meter according to claim 2, characterized in that: The stepped wedge-shaped sealing seat (301) is fixedly installed at the top of the water meter body (1), and the top of the stepped wedge-shaped sealing seat (301) is provided with a number of fixing screw holes (304).
4. The waterproof liquid-sealed non-magnetic remote water meter according to claim 3, characterized in that: The top of the stepped wedge-shaped sealing seat (301) is movably provided with a sealing ring (305), and the bottom end of the sealing ring (305) is provided with a mating groove (306).
5. A waterproof liquid-encapsulated non-magnetic remote water meter according to claim 4, characterized in that: The stepped wedge-shaped sealing seat (301) is movably disposed inside the docking groove (306), and the top end of the sealing ring (305) is provided with a fixing hole (307), and the bottom end of the fixing hole (307) passes through the sealing ring (305).
6. A waterproof liquid-encapsulated non-magnetic remote water meter according to claim 5, characterized in that: The fixing hole (307) corresponds to the fixing screw hole (304). The fixing hole (307) has an installation hole (308) inside, and a compensation spring (309) is provided inside the installation hole (308).
7. The waterproof liquid-sealed non-magnetic remote water meter according to claim 6, characterized in that: The top end of the compensation spring (309) is fixedly disposed inside the top end of the mounting hole (308), and the bottom end of the compensation spring (309) is fixedly disposed inside the bottom end of the mounting hole (308).
8. The waterproof liquid-sealed non-magnetic remote water meter according to claim 7, characterized in that: The docking groove (306) has several anti-slip textures (310) inside.