Knob-type anti-dismantling apparatus applied to metering system, metering device and metering system
A metering system and knob-type technology, applied in the field of meters, can solve the problems of large anti-demolition structure design, long time-consuming installation and disassembly, and large space occupation, so as to increase the difficulty of disassembly, facilitate waterproof and dustproof, and improve coordination degree of effect
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Embodiment 2
[0065] refer to Figure 7-9 , the difference between this embodiment and Embodiment 1 is that the knob type anti-tampering device also includes a tamper-evident piece, the outer cover 210 is provided with a through hole, and the inner cover 220 is provided with a rotating drive part corresponding to the through hole, and the anti-tampering piece is installed in the through hole. After the anti-tamper cover is installed and locked, the anti-tamper cover is set to prevent the locked state of the anti-tamper cover from being destroyed by ordinary users, and the anti-tamper effect is strengthened.
[0066] Preferably: since the outer cover boss 211 is provided on the outer cover 210, and the inner cover boss 221 is arranged on the inner cover 220, in this embodiment, a through hole 215 is arranged in the axial direction on the outer cover boss 211, and the inner cover boss 221 is provided with a rotary drive part inside, and the rotary drive part is a slot 224 that matches a prof...
Embodiment 3
[0071] refer to Figure 10 , 11 , this embodiment is improved on the basis of any of the preceding embodiments: a positioning protrusion 216 is provided on the edge of the outer cover 210, and a positioning groove 112 is provided on the wall of the assembly opening 110. The groove 112 cooperates to locate the relative position of the tamper-evident cover in the assembly opening 110 . With such a design, when installing the tamper-proof cover, the operator only needs to match the positioning protrusion 216 into the positioning groove 112, and then the anti-tamper cover can be positioned at the relative position between the inner cover gap 222 and the stopper 111, and then push the anti-tamper The cover is disassembled to fit it in place, and the operation is more convenient; and after the anti-demolition cover is locked, the rotation of the anti-demolition cover can be restricted by the cooperation of the positioning protrusion 216 and the positioning groove 112, and the insta...
Embodiment 4
[0073] refer to Figure 12 , this embodiment is improved on the basis of any of the above-mentioned embodiments: a sealing ring is provided on the peripheral side of the tamper-evident cover, so that the tamper-evident cover is sealed and installed to the assembly port 110 . Preferably, the peripheral side of the outer cover 210 is provided with an annular groove 217 along the circumferential direction, and the sealing ring 500 is partially embedded in the annular groove 217. After the tamper-resistant cover is installed in the assembly port 110, the sealing ring 500 is close to the wall of the assembly port 110 , so that a seal is formed between the tamper-evident cover and the wall of the assembly port 110, thereby improving the waterproof and dustproof effect.
[0074] It can be understood that the outer cover can be made of sealing material, and there is a certain amount of interference between the outer cover and the assembly port. After the anti-tamper cover is installed...
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