Sealing structure of fluidic water meter, sealing method of fluidic water meter and fluidic water meter

Abstract

The application provides a sealing structure of a fluidic water meter, a sealing method of the fluidic water meter and the fluidic water meter, and relates to the technical field of the fluidic water meter.The sealing structure of the fluidic water meter comprises a shell, a cover plate and a sealing ring.The shell has a fluidic cavity.The cover plate is provided with a boss, and a clamping groove is arranged along the sidewall of the boss.The sealing ring is sleeved on the boss and placed in the clamping groove.The boss is inserted into the fluidic cavity, and the sealing ring is compressed between the boss and the inner sidewall of the fluidic cavity.The cover plate covers the fluidic cavity, and the cover plate is welded to the shell.The double sealing of the sealing ring and the welding line can be formed, the sealing ring is not easy to be deflected, the alignment of the cover plate and the shell can be ensured to be accurate, the inner wall of the fluidic cavity can be ensured not to be polluted by glue marks, the inner wall of the fluidic cavity can be ensured to be smooth, and the measurement precision is improved.

Description

Technical Field

[0001] This invention relates to the field of jet water meter technology, and in particular to a jet water meter sealing structure, a jet water meter sealing method, and a jet water meter. Background Technology

[0002] To ensure magnetic field stability and save costs, the sensors of existing small-diameter jet water meters usually use plastic housings. However, because the internal structure of the jet cavity of the sensor cannot be integrally cast using injection molds, it is divided into two parts: the housing and the lower cover. The housing and the lower cover are connected by pressing and sealing with sealing rings or by adhesive bonding.

[0003] When using a sealing ring for tight sealing, impurities in the water can cause friction, leading to aging of the sealing ring and potential seal failure, necessitating regular replacement. Furthermore, sealing rings have relatively poor adaptability to temperature and pressure, and are prone to aging and cracking under high temperature or high pressure environments. Especially in environments with drastic water pressure changes and freezing, the connection between the shell and the lower cover, as well as the sealing ring, undergoes repeated deformation under pressure, causing a loose seal between the shell and the lower cover, resulting in seal failure.

[0004] When adhesives are used for bonding, adhesive residue may remain, potentially causing excess adhesive to seep into the jet cavity and making the inner wall of the cavity rough. This results in turbulence after water flows through, affecting the oscillation of the water flow within the jet cavity and consequently impacting the overall metering performance of the water meter. Selecting adhesives with high adhesion and compatibility with the housing material is not easy; changes in housing material often necessitate the selection of a new, suitable adhesive. Furthermore, using incompatible adhesives can lead to insufficient bond strength, potentially causing seal failure under conditions of drastic water pressure changes or water freezing.

[0005] Therefore, considering production costs and yield rates, the previous two methods were more complex, and the adhesive method required waiting for the adhesive to cure, resulting in low installation efficiency. In actual installation, issues such as misaligned sealing rings and uneven adhesive bonding also affected the yield rate, requiring a higher level of operational skill from the workers. Summary of the Invention

[0006] The purpose of this invention is to provide a jet water meter sealing structure, a jet water meter sealing method, and a jet water meter, so as to alleviate the technical problem that the existing jet water meter sealing structure is prone to sealing failure.

[0007] In a first aspect, the jet water meter sealing structure provided by the present invention includes: a housing, a cover plate, and a sealing ring;

[0008] The housing has a jet cavity;

[0009] The cover plate is provided with a boss, and a slot is provided along the side wall of the boss;

[0010] The sealing ring is fitted over the boss and placed inside the slot;

[0011] The boss is inserted into the jet cavity, and the sealing ring is pressed between the boss and the inner wall of the jet cavity;

[0012] The cover plate covers the jet cavity and is welded to the housing.

[0013] In conjunction with the first aspect, the present invention provides a first possible implementation of the first aspect, wherein the cover plate has a mating end face and the boss protrudes from the mating end face;

[0014] The joint end face is attached and welded to the housing.

[0015] In conjunction with the first possible implementation of the first aspect, the present invention provides a second possible implementation of the first aspect, wherein the distance between the joint end face and the sealing ring in a direction perpendicular to the joint end face is greater than 2 mm.

[0016] In conjunction with the first possible implementation of the first aspect, the present invention provides a third possible implementation of the first aspect, wherein the mating end face is provided with a first protruding ridge, the first protruding ridge is spaced apart from the boss, and the first protruding ridge extends around the boss;

[0017] The first protruding ridge has a pointed portion, which extends along the first protruding ridge, and a welding line is formed along the pointed portion by welding.

[0018] In conjunction with the third possible implementation of the first aspect, the present invention provides a fourth possible implementation of the first aspect, wherein the first convex ridge is triangular in cross-section perpendicular to the welding line and forms the tip, the included angle of the tip being 55° to 65°.

[0019] In conjunction with the third possible implementation of the first aspect, the present invention provides a fifth possible implementation of the first aspect, wherein the distance between the joint end face and the tip in a direction perpendicular to the joint end face is 0.7 mm to 1 mm.

[0020] In conjunction with the third possible implementation of the first aspect, the present invention provides a sixth possible implementation of the first aspect, wherein the distance between the tip and the sealing ring is greater than 1 mm.

[0021] In conjunction with the third possible implementation of the first aspect, the present invention provides a seventh possible implementation of the first aspect, wherein the housing is provided with a second protruding ridge protruding toward the engagement end face, the second protruding ridge being located between the first protruding ridge and the boss.

[0022] Secondly, the jet water meter sealing method provided by the present invention adopts the jet water meter sealing structure described in the first aspect, and includes the following steps:

[0023] The housing and the cover plate are connected by ultrasonic welding, and a weld line is formed between the housing and the cover plate;

[0024] The ultrasonic welding vibration frequency is 20KHz, the amplitude is 10-15μm, and the welding time is 0.2s.

[0025] Thirdly, the jet water meter provided by the present invention includes the jet water meter sealing structure described in the first aspect.

[0026] The embodiments of the present invention bring the following beneficial effects: a shell with a jet cavity is welded to a cover plate, the cover plate is provided with a boss, and a groove is provided along the side wall of the boss. A sealing ring is fitted onto the boss and placed in the groove. The boss is inserted into the jet cavity, and the sealing ring is pressed between the boss and the inner side wall of the jet cavity. This can form a double seal of sealing ring and welding line. The sealing ring is not easy to deviate, and it can ensure accurate alignment between the cover plate and the shell. It can also ensure that the inner wall of the jet cavity is not contaminated by glue residue, and ensure that the inner wall of the jet cavity is smooth, thereby improving the measurement accuracy.

[0027] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of the present invention, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is a cross-sectional view of the sealing structure of the jet water meter provided in an embodiment of the present invention;

[0030] Figure 2 A schematic diagram of the cover plate of the jet water meter sealing structure provided in an embodiment of the present invention;

[0031] Figure 3 A cross-sectional view of the cover plate of the jet water meter sealing structure provided in an embodiment of the present invention;

[0032] Figure 4 This is a partially enlarged schematic diagram of the sealing structure of the jet water meter provided in an embodiment of the present invention.

[0033] Icons: 100 - Housing; 101 - Jet cavity; 102 - Second protruding ridge; 200 - Cover plate; 201 - Boss; 202 - Slot; 203 - Joint end face; 204 - First protruding ridge; 205 - Tip; 300 - Sealing ring. Detailed Implementation

[0034] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities in the International System of Units (SI), or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.

[0036] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the jet water meter sealing structure provided in this embodiment of the invention includes: a housing 100, a cover plate 200, and a sealing ring 300; the housing 100 has a jet cavity 101; the cover plate 200 is provided with a boss 201, and a groove 202 is provided along the side wall of the boss 201; the sealing ring 300 is fitted onto the boss 201 and placed in the groove 202; the boss 201 is inserted into the jet cavity 101, and the sealing ring 300 is pressed between the boss 201 and the inner side wall of the jet cavity 101; the cover plate 200 covers the jet cavity 101, and the cover plate 200 is welded to the housing 100.

[0038] During assembly, the sealing ring 300 is first fitted onto the boss 201 and embedded in the slot 202. Then, the cover plate 200 is placed over the jet cavity 101, with the boss 201 inserted into the jet cavity 101, pressing the sealing ring 300 between the boss 201 and the inner wall of the jet cavity 101. At this point, the cover plate 200 is accurately aligned with the housing 100, preventing the sealing ring 300 from becoming misaligned. Subsequently, the cover plate 200 is welded to the housing 100, forming a double seal of the sealing ring 300 and the weld line. This not only improves the sealing performance but also prevents adhesive residue from appearing inside the jet cavity 101, ensuring a smooth inner wall and improving metering accuracy.

[0039] like Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment of the invention, the cover plate 200 has a joint end face 203, and a boss 201 protrudes from the joint end face 203; the joint end face 203 is attached to and welded to the housing 100. The inner wall is smooth to improve measurement accuracy. The cover plate 200 is welded to the housing 100 using ultrasonic welding along the joint end face 203. Excess material at the weld line can be blocked by the boss 201, preventing welding overflow from entering the jet cavity 101.

[0040] Furthermore, the distance between the joint end face 203 and the sealing ring 300 in the direction perpendicular to the joint end face 203 is greater than 2mm. On the one hand, this can prevent the welding overflow on the joint end face 203 from contacting the sealing ring 300. On the other hand, the sealing ring 300 can share the stress, thereby reducing the stress concentration at the welding position. The shell 100 and the cover plate 200 are approximately integrally formed, which improves the sealing and pressure resistance of the structure.

[0041] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the joint end face 203 is provided with a first protruding ridge 204, which is spaced apart from the boss 201, and the first protruding ridge 204 extends around the boss 201; the first protruding ridge 204 is provided with a tip 205, which extends along the first protruding ridge 204, and a welding line is formed by welding along the tip 205.

[0042] Specifically, during welding, the tip 205 has concentrated heat and melts rapidly, while the shell 100, which is opposite to the tip 205, has a smaller amount of melting or almost no melting, resulting in a more uniform weld line and preventing molten material from entering the jet cavity 101.

[0043] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the first protruding ridge 204 is triangular in cross-section perpendicular to the welding line and forms a tip 205, with the included angle of the tip 205 being 55° to 65°.

[0044] Specifically, on a cross-section perpendicular to the welding line, the first protruding ridge 204 is an isosceles triangle, with the apex of the isosceles triangle forming a apex 205 and the included angle being 55° to 65°. During welding, the apex 205 melts, and the cover plate 200 approaches and compresses the molten material relative to the shell 100. The molten overflow can flow to both sides along the two sides of the isosceles triangle, which can prevent welding overflow or seepage into the jet cavity 101.

[0045] Furthermore, the distance between the joint end face 203 and the tip 205 in the direction perpendicular to the joint end face 203 is 0.7mm to 1mm. Under the conditions of a vibration frequency of 20KHz, an amplitude of 10μm to 15μm, and a welding time of 0.2s, the heat generated by ultrasonic vibration can be better concentrated on the tip 205.

[0046] It should be noted that the distance between the tip 205 and the sealing ring 300 is greater than 1mm. Before welding, the stress is borne by the sealing ring 300. The stress concentration point is more than 1mm away from the weld line formed by the melting of the tip 205, which can reduce the stress at the weld and improve the overall pressure resistance and sealing performance.

[0047] like Figure 1 and Figure 4 The housing 100 is provided with a second protruding ridge 102 that protrudes toward the joint end face 203, and the second protruding ridge 102 is located between the first protruding ridge 204 and the boss 201.

[0048] Specifically, the housing 100 has a plane opposite to the first protruding ridge 204 and parallel to the joint end face 203, and the tip 205 is melted and solidified on this plane to form a weld line. The second protruding ridge 102 protrudes from this plane in a direction close to the joint end face 203, and the second protruding ridge 102 can prevent molten overflow from entering the gap between the boss 201 and the side wall of the jet cavity 101.

[0049] In addition, the second protruding ridge 102 is rectangular with a height of 0.4mm to 0.6mm and a width of 1mm to 1.5mm on the cross section perpendicular to the welding line. It can not only withstand the ultrasonic vibration and maintain its shape stability when the tip 205 melts, but also prevent the molten material from seeping into the jet cavity 101.

[0050] like Figure 1As shown, the jet water meter sealing method provided in this embodiment of the invention adopts the jet water meter sealing structure described in the above embodiments, and includes the following steps: connecting the housing 100 and the cover plate 200 by ultrasonic welding, and forming a welding line between the housing 100 and the cover plate 200; the vibration frequency of ultrasonic welding is 20KHz, the amplitude is 10μm-15μm, and the welding time is 0.2s.

[0051] In this embodiment of the invention, a combination of sealing with a sealing ring 300 and ultrasonic welding is achieved. Before welding, the sealing ring 300 forms a seal between the housing 100 and the cover plate 200, ensuring accurate alignment between the housing 100 and the cover plate 200. It can also bear most of the stress, thereby reducing the stress at the welding position and reducing the probability of connection failure at the weld between the housing 100 and the cover plate 200. The dual sealing combination can enhance each other, achieving a "one plus one is greater than two" effect, making the sealing effect more reliable.

[0052] The jet water meter provided in this embodiment of the invention includes the jet water meter sealing structure described in the above embodiments. The jet water meter has the technical effects of the above-described jet water meter sealing structure, which will not be repeated here.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sealing structure for a jet water meter, characterized in that, include: Housing (100), cover plate (200) and sealing ring (300); The housing (100) has a jet cavity (101); The cover plate (200) is provided with a boss (201) and a slot (202) is provided along the side wall of the boss (201). The sealing ring (300) is fitted over the boss (201) and placed in the slot (202); The boss (201) is inserted into the jet cavity (101), and the sealing ring (300) is pressed between the boss (201) and the inner wall of the jet cavity (101); The cover plate (200) covers the jet cavity (101), and the cover plate (200) is welded to the housing (100).

2. The sealing structure of the jet water meter according to claim 1, characterized in that, The cover plate (200) has a mating end face (203), and the boss (201) protrudes from the mating end face (203); The joint end face (203) is attached to and welded to the housing (100).

3. The sealing structure of the jet water meter according to claim 2, characterized in that, The distance between the joint end face (203) and the sealing ring (300) in a direction perpendicular to the joint end face (203) is greater than 2 mm.

4. The sealing structure of the jet water meter according to claim 2, characterized in that, The joint end face (203) is provided with a first protruding ridge (204), the first protruding ridge (204) is spaced apart from the boss (201), and the first protruding ridge (204) extends around the boss (201); The first protruding ridge (204) is provided with a tip (205), the tip (205) extends along the first protruding ridge (204), and a welding line is formed by welding along the tip (205).

5. The sealing structure of the jet water meter according to claim 4, characterized in that, The first protruding ridge (204) is triangular in cross section perpendicular to the welding line and forms the tip (205), the included angle of the tip (205) being 55° to 65°.

6. The sealing structure of the jet water meter according to claim 4, characterized in that, The distance between the joint end face (203) and the tip (205) in a direction perpendicular to the joint end face (203) is 0.7 mm to 1 mm.

7. The sealing structure of the jet water meter according to claim 4, characterized in that, The distance between the tip (205) and the sealing ring (300) is greater than 1 mm.

8. The sealing structure of the jet water meter according to any one of claims 4-7, characterized in that, The housing (100) is provided with a second protrusion (102) that protrudes toward the joint end face (203), and the second protrusion (102) is located between the first protrusion (204) and the boss (201).

9. A method for sealing a jet water meter, employing the jet water meter sealing structure according to any one of claims 1-8, characterized in that, Includes the following steps: The housing (100) and the cover plate (200) are connected by ultrasonic welding, and a welding line is formed between the housing (100) and the cover plate (200); The ultrasonic welding vibration frequency is 20KHz, the amplitude is 10-15μm, and the welding time is 0.2s.

10. A jet water meter, characterized in that, Includes the jet water meter sealing structure as described in any one of claims 1-8.

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