Screw anti-disassembly structure applied to large-caliber water meter

Abstract

The invention relates to the field of large-caliber water meters, in particular to a screw anti-disassembly structure applied to a large-caliber water meter, which comprises a bolt for connecting a water meter flange cover and a water meter shell, the outer side of the head of the bolt is sleeved with an inverted buckle base, the rod part of the bolt penetrates through the bottom of the inverted buckle base, and the inverted buckle base is provided with an opening above the head of the bolt. The head of the bolt is sleeved with an inverted buckle cover which is located on the inner side of the inverted buckle base. According to the water meter, the two protection parts are additionally arranged by adopting an inverted buckle type structure, the meter dismounting operation and the water meter maintenance can be facilitated, the operation can be repeatedly carried out, and the function of the water meter cannot be influenced at all.

Description

Technical Field

[0001] The invention relates to the field of large-diameter water meters, and in particular to a screw anti-disassembly structure applied to large-diameter water meters. Background Art

[0002] Industrial large-caliber water meters generally use hexagon socket bolts to connect and tighten the flange cover and the water meter body, and then use lead seals and lead seal wires to tie one of the hexagon socket bolts to the screws on the water meter head, such as Figure 1 . When the water meter is installed on site, when the water management department wants to dismantle the meter, repair or replace the internal accessories of the water meter, they can cut the lead seal line short and directly dismantle the water meter for operation. The water meter is used to measure how much water the user uses every day, month, and year, and how much water fee the user needs to pay. Therefore, there may be a small number or part of users who want to dismantle the meter in order to pay less water fees, so as to damage or affect the normal metering function of the water meter. The current method of tightening with bolts and adding lead seals cannot prevent dismantling and water theft. It is very easy for users to operate, and this lead seal and lead seal line are still relatively easy to buy on the market. If a user dismantles the meter, it is actually very difficult for the water management department to judge and identify it.

[0003] In order to solve this problem, there is an anti-theft and anti-disassembly structure, such as Figures 2 to 4 As shown. First, install the anti-tamper flange cover with bolt holes, then install the hexagon socket bolts, tighten them, and finally insert the anti-tamper plug (metal). This can completely block the hexagon socket bolt holes to prevent later manual opening and damage to the inside of the water meter, but at the same time, it also brings inconvenience to the manufacturer itself and the water management department. When the manufacturer and the water management department consider dismantling the meter due to inaccurate metering performance, movement replacement, and other reasons, it will bring difficulties. They can only remove the anti-tamper plug and anti-tamper flange cover destructively, and it is particularly difficult to remove. This brings difficulties to the manufacturer and the water management department, and also increases additional costs. Therefore, this structural solution is used less and less in the market.

[0004] The existing solution uses standard hexagon socket bolts and lead seals to prevent disassembly. Although it is simple and easy to operate, it is also easy to dismantle the water meter, which cannot achieve the purpose of preventing disassembly, protecting water use, and measuring water fees normally. Another structure that adds anti-pry covers and anti-pry plugs can completely prevent malicious disassembly, but it also increases the difficulty of after-sales maintenance for water management departments and water meter manufacturers, and it takes time and money to dismantle it yourself. Summary of the invention

[0005] The purpose of the present invention is to provide a screw anti-disassembly structure applied to a large-diameter water meter, which can facilitate meter disassembly operation and water meter repair and maintenance, and is conducive to reducing the impact on the water meter function.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the present invention provides a screw anti-disassembly structure used on large-diameter water meters, including a bolt for connecting a water meter flange cover and a water meter housing, an inverted base is sleeved on the outer side of the head of the bolt, the rod of the bolt passes through the bottom of the inverted base, the inverted base is provided with an opening above the head of the bolt, the head of the bolt is sleeved on an inverted cover, and the inverted cover is located on the inner side of the inverted base.

[0007] Preferably, a metal gasket is sleeved on the rod portion of the bolt, and the metal gasket is located between the head of the bolt and the water meter flange cover.

[0008] Preferably, the bottom of the undercut base is located between the bolt head and the metal gasket.

[0009] Preferably, the inverted cover can be pressed into the inner side of the inverted base through an opening at the top of the inverted base.

[0010] Preferably, a gap is provided between the inverted cover and the inverted base.

[0011] Preferably, a gap is provided between the inverted cover and the bolt.

[0012] Preferably, an undercut boss or protrusion is provided on the side of the undercut cover.

[0013] Preferably, the undercut boss or protrusion may be a triangular boss, an arc boss, a spring protrusion or a rib protrusion.

[0014] Preferably, the bolts are hexagon socket bolts.

[0015] In summary, the present invention includes the following beneficial technical effects:

[0016] The present invention adopts an inverted structure to add two protective parts, namely, an inverted cover and an inverted base. After being buckled, on the one hand, it does not affect the use, and on the other hand, the overall appearance is beautiful. In practical applications, manufacturers and water management departments understand its structure and operation usage, so it is convenient for them to dismantle the meter and repair and maintain the water meter, and the operation can be performed repeatedly without any impact on the water meter function. For users, since they do not understand its structure and do not have such special anti-dismantling accessories, they do not know how to dismantle it. Even if the water meter is disassembled, it is difficult to find suitable anti-dismantling accessories on the market. When the water management department conducts on-site inspection and meter reading, it will be obvious at a glance that the water meter has been disassembled by the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the connection and fastening method of industrial large-caliber water meters in the prior art;

[0018] Figure 2 Schematic diagram of the anti-theft and anti-disassembly structure of industrial large-caliber water meters in the prior art Figure 1 ;

[0019] Figure 3 Schematic diagram of the anti-theft and anti-disassembly structure of industrial large-caliber water meters in the prior art Figure 2 ;

[0020] Figure 4 Schematic diagram of the anti-theft and anti-disassembly structure of industrial large-caliber water meters in the prior art Figure 3 ;

[0021] Figure 5 The present invention is a schematic structural diagram of a screw anti-disassembly structure used in a large-diameter water meter.

[0022] Figure numerals: 1. hexagon socket bolt; 2. inverted cover; 3. inverted base; 4. metal gasket; 5. water meter flange cover; 6. water meter housing; 7. inverted boss or protrusion. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The present invention proposes a special anti-disassembly structure for connecting screws on industrial large-caliber water meters, that is, an undercut structure is added based on the existing screw structure to achieve the purpose of anti-disassembly. Figure 3 The present invention comprises a hexagon socket bolt 1 for connecting a water meter flange cover 5 and a water meter housing 6, wherein an inverted base 3 is sleeved on the outer side of the head of the hexagon socket bolt 1, a rod of the hexagon socket bolt 1 passes through the bottom of the inverted base 3, an opening is provided on the upper side of the head of the hexagon socket bolt 1, an inverted cover 2 is sleeved on the head of the hexagon socket bolt 1, and the inverted cover 2 is located on the inner side of the inverted base 3.

[0025] The rod of the hexagon socket bolt 1 is sleeved with a metal gasket 4, which is located between the head of the hexagon socket bolt 1 and the water meter flange cover 5. The bottom of the inverted base 3 is located between the head of the hexagon socket bolt 1 and the metal gasket 4. A gap is provided between the inverted cover 2 and the inverted base 3. A gap is provided between the inverted cover 2 and the hexagon socket bolt 1. The inverted cover 2 can be pressed into the inner side of the inverted base 3 through the opening at the top of the inverted base 3. The side of the inverted cover 2 is provided with an inverted boss or protrusion 7, which can be a triangular boss, an arc boss, a spring protrusion or a rib protrusion.

[0026] The present invention uses the hexagon socket bolt 1 and the metal gasket 4 to connect and fasten the water meter flange cover 5 and the water meter housing 6. At the same time, the undercut base 3 and the undercut cover 2 are added and assembled under the head of the hexagon socket bolt 1. After the undercut cover 2 is pressed into the undercut base 3, a certain gap is designed between the two parts, and a gap is also designed between the undercut cover 2 and the hexagon socket bolt 1. The purpose of the gap design is to facilitate the undercut cover 2 and the undercut base 3 to be squeezed and deformed when an external tool applies pressure, and the gap becomes larger. Then, the undercut cover 2 is forcibly pried off with an external tool, and then the hexagon socket bolt 1 is unscrewed.

[0027] The implementation principle of the present invention is as follows:

[0028] 1) The hexagon socket bolt 1 is first assembled with the undercut base 3, and then the metal gasket 4;

[0029] 2) The water meter flange cover 5 and the water meter housing 6 are connected and fastened with the hexagon socket bolts 1;

[0030] 3) Use external force to squeeze the inverted cover 2 in and assemble it in place;

[0031] 4) When it is necessary to disassemble, use an external tool to squeeze the side of the inverted base 3, so that the inverted base 3 is deformed and the gap between it and the inverted cover 2 is increased;

[0032] 5) Use an external tool such as a screwdriver to insert it into the gap between the inverted base 3 and the inverted cover 2 and pry it outwards. The inverted cover 2 can be loosened and easily pried off.

[0033] Compared with the prior art, the solution of the present invention is to add an inverted cover 2 and an inverted base 3. Before the water meter flange cover 5 and the water meter housing 6 are fastened, the hexagon socket bolt 1, the inverted base 3 and the metal gasket 4 are assembled first, and then the inverted cover 2 is pressed in. In addition to the clearance design between the inverted cover 2 and the inverted base 3, an inverted structure (inverted boss or protrusion 7) is also designed to prevent the inverted cover 2 from falling off after being installed in the inverted base 3. The inverted structure is not limited to a triangular boss, an arc boss, a spring protrusion, a rib protrusion, etc.

[0034] In the present invention, the inverted cover 2, the inverted base 3 and the hexagon socket bolt 1 are used in combination to prevent disassembly; a reasonable gap should be maintained between the inverted cover 2 and the inverted base 3, and between the inverted cover 2 and the hexagon socket bolt 1, so as to facilitate the insertion and prying of the inverted cover 2 by external tools; the inverted cover 2 is pressed into the inverted base 3 and will not fall off, and an inverted boss or protrusion 7 is designed on the side of the inverted cover 2, so that the inverted cover 2 can be pressed into the inverted base 3 from the outside; the inverted structure is applied to large-diameter water meters and industrial water meters to achieve the purpose of preventing water meters from being disassembled.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A screw anti-disassembly structure used in large-caliber water meters, characterized in that: The invention comprises a bolt for connecting a water meter flange cover (5) and a water meter housing (6), wherein an inverted base (3) is sleeved on the outer side of the head of the bolt, the rod of the bolt passes through the bottom of the inverted base (3), the inverted base (3) is provided with an opening above the head of the bolt, and an inverted cover (2) is sleeved on the head of the bolt, and the inverted cover (2) is located on the inner side of the inverted base (3).

2. According to claim 1, a screw anti-disassembly structure used in a large-caliber water meter is characterized in that: The rod of the bolt is sleeved with a metal gasket (4), and the metal gasket (4) is located between the head of the bolt and the water meter flange cover (5).

3. The screw anti-disassembly structure used in a large-caliber water meter according to claim 2, characterized in that: The bottom of the undercut base (3) is located between the bolt head and the metal gasket (4).

4. The screw anti-disassembly structure used in a large-caliber water meter according to claim 1, characterized in that: The inverted cover (2) can be pressed into the inner side of the inverted base (3) through the opening at the top of the inverted base (3).

5. The screw anti-disassembly structure used in a large-caliber water meter according to claim 4, characterized in that: A gap is provided between the inverted cover (2) and the inverted base (3).

6. The screw anti-disassembly structure used in a large-caliber water meter according to claim 5, characterized in that: A gap is provided between the inverted cover (2) and the bolt.

7. The screw anti-disassembly structure used in a large-caliber water meter according to claim 1, characterized in that: An undercut boss or protrusion (7) is provided on the side of the undercut cover (2).

8. The screw anti-disassembly structure used in a large-caliber water meter according to claim 7, characterized in that: The undercut boss or protrusion (7) can be a triangular boss, an arc boss, a spring protrusion or a rib protrusion.

9. The screw anti-disassembly structure used in a large-caliber water meter according to claim 1, characterized in that: The bolt is a hexagon socket bolt (1).

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