CN206770355U - Lead sealing screw - Google Patents

Abstract

The utility model discloses a kind of lead sealing screw, the lead sealing screw includes screw rod and nut, the bottom of the screw rod is provided with external connection screw, the access slot that the top of the screw rod is set with nut bottom is threadedly coupled, the top of the screw rod is provided with the perforation extended radially through, spacing hole is provided with the inwall of the access slot, the lead sealing bar for being fixed with that stress is pliable or is broken is worn in the perforation and spacing hole;The screw thread of the screw rod bottom is identical with the thread rotary orientation on top, and the screw thread of the screw rod bottom is connection screw thread, the screw thread on the screw rod top is motion thread, the problem of overcoming the bind position that extra increase lead sealing bar is needed during lead sealing screw use, reduces the restrictive condition using lead sealing screw.

Description

Lead sealing screw

Technical field

A kind of screw is the utility model is related to, more particularly to a kind of lead sealing screw.

Background technology

In electric energy meter manufacturing industry, to prevent electric consumer opens table cover without authorization from changing meter parameter, almost all of electricity Energy table cover all uses lead seal structure, and lead seal hole is arranged on the body of head of screw by traditional lead sealing screw, then with lead sealing band Bind is on ammeter or electronic box.Such as Chinese patent that Authorization Notice No. is CN204288694U, to disclose a kind of electric energy meter special With threading lead sealing screw, belong to screw manufacturing field, lead sealing head of screw side wall has uniform lead seal hole, and lead sealing screw spin slot is in side Pars intramuralis.

Its working method is to pass through lead sealing with lead sealing bar or lead sealing silk thread by after ammeter installation with lead sealing screw Hole, then then lead sealing bar or lead sealing silk thread are entered by components such as lead sealing blocks in the cyclic structure of ammeter or electronic box around knot Row is fixed；Lead sealing bar or seal wire must be then cut if attempting to change ammeter privately, so as to produce the effect of warning；But this Also require there must be the structure that can be used for bind of ring-type on ammeter or electronic box, can have when in use to the structure of ammeter It is certain to require.

Utility model content

The purpose of this utility model is to provide a kind of lead sealing screw, which solves that need during existing screw use will The problem of asking ammeter or electronic box additionally to increase bind position.

Above-mentioned technical purpose of the present utility model technical scheme is that：

A kind of lead sealing screw, including screw rod and nut, the bottom of the screw rod are provided with external connection screw, the screw rod it is upper The access slot that portion is set with nut bottom is threadedly coupled, and the screw thread of the screw rod bottom is identical and described with the thread rotary orientation on top The screw thread of screw rod bottom is connection screw thread, and the screw thread on the screw rod top is motion thread；The top of the screw rod is provided with edge The perforation extended radially through, spacing hole is provided with the inwall of the access slot, is worn in the perforation and spacing hole and is fixed with stress Pliable or fracture lead sealing bar.

Using such scheme, typically when dispatching from the factory, nut is in tightening state with screw rod, and lead sealing bar is worn Therebetween；When locking operation is carried out with screw, because the thread rotary orientation of upper and lower part is identical, both are not in Relative motion, so as to keep lead sealing bar intact；After pushing on, if needing to screw is screwed out, between nut and screw rod It will relatively rotate, lead sealing bar stress produces fracture or bending, is detected with this and judges whether screw was unscrewed, Ci Zhongshe Put and avoid when needing to set lead sealing bar, lead sealing band etc. fixed during screw use, it is necessary to additionally increase bind position Problem.

More preferably：The spacing hole runs through nut, and the spacing hole is provided with the opening outside nut The end socket of welding.

Using such scheme, the spacing hole run through is easily installed strip of paper used for sealing, and carrying out welding blocking using end socket can avoid sealing Bar is pushed directly taking-up.

More preferably：The top of the screw rod is provided with the rotation head for being easy to clamp rotary screw.

Using such scheme, after strip of paper used for sealing fracture, rotate, can occur between nut and screw rod relative toward the direction screwed out Rotate so that cap rotation goes out and screw rod is still within mounting hole, at this moment utilize tool holder rotation head, you can by screw rod Screw out.

More preferably：Cross recess is provided with the top of the nut.

Using such scheme, cross recess is easy to be clamped operation with screwdriver.

More preferably：The cross recess includes transverse groove and cannelure, and the transverse groove runs through the side wall of nut.

Using such scheme, this mode of grooving can both use cross screwdriver, can use yi word pattern again Screwdriver, the limitation to instrument is reduced, improve operation ease.

More preferably：The rotation direction mark screwed is provided with the nut.

Using such scheme, rotation direction mark can avoid operating personnel's maloperation and cause strip of paper used for sealing stress deformation or fracture.

In summary, the utility model has the advantages that：

Fully with the characteristic of bar double thread, lead sealing bar is arranged on inside nut, during avoiding lead sealing screw use The problem of needing the bind position of extra increase lead sealing bar, reduce the restrictive condition using lead sealing screw.

Brief description of the drawings

Fig. 1 is the internal structure schematic diagram of the lead sealing screw of embodiment 1；

Fig. 2 is the overall structure figure of the nut of embodiment 1；

Fig. 3 is the structural representation of the lead sealing screw of embodiment 2；

Fig. 4 is the internal structure schematic diagram of the lead sealing screw of embodiment 2；

Fig. 5 is the internal structure schematic diagram of the lead sealing screw of embodiment 3.

In figure, 1, screw rod；2nd, nut；3rd, joint；4th, lead sealing bar；5th, end socket；11st, flat recess；12nd, limited step；13rd, revolve Head；14th, perforate；21st, cross recess；211st, transverse groove；212nd, cannelure；213rd, rotation direction marks；22nd, access slot；23rd, stopper slot； 24th, control terminal；25th, spacing hole；31st, elastic rod；32nd, spacing head；33rd, groove is stored；34th, locating part；35th, wire drawing；36th, bottom Seat；37th, steady arm；38th, upper frame；41st, gland.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

This specific embodiment is only that it is not to limitation of the present utility model, ability to explanation of the present utility model Field technique personnel can make the modification of no creative contribution to the present embodiment as needed after this specification is read, but As long as all protected in the scope of protection of the utility model by Patent Law.

Embodiment 1：A kind of lead sealing internal lead sealing screw, as illustrated in fig. 1 and 2, including screw rod 1 and nut 2, nut 2 Top is provided with cross recess 21；Cross recess 21 includes transverse groove 211 and cannelure 212, and transverse groove 211 is through nut 2 Side wall.

Reference picture 1, the 2 axially disposed stopper slots for having access slot 22, annular being provided with the inwall of access slot 22 in nut 23, the top of screw rod 1 is provided with joint 3, and the top of joint 3 is provided with the multiple spacing heads being uniformly arranged around the outer wall of joint 3 32 and multiple elastic rods 31, elastic rod 31 be fixed on the top of joint 3, spacing first 32 are fixed on the top of elastic rod 31；It is multiple Spacing first 32 combination forms the frustum of side wall hollow out.When screw and nut 2 are assembled, elastic rod 31 is bent, limit Potential head 32 draws close generation to centre gets out of the way effect until falling into stopper slot 23.Spacing first 3232 bottom is flush end, is so existed Blocking effect is preferable after falling into stopper slot 23.The bottom that the bottom of joint 3 is provided with joint 3 is provided with and stores groove 33.Store The lead sealing bar 4 of tension easy fracture is provided with groove 33, top of the both ends of lead sealing bar 4 respectively with joint 3 and screw rod 1 is fixed.

The bottom of screw rod 1 is provided with external connection screw, and the top of screw rod 1 is threadedly coupled with access slot 22, the screw thread of the bottom of screw rod 1 It is identical with the thread rotary orientation on top, and the screw thread of the bottom of screw rod 1 is connection screw thread, the screw thread on the top of screw rod 1 is motion thread.

Nut and screw can be in tightening state when dispatching from the factory, and at this moment carry out locking operation, nut and screw rod with screw Be not in relative motion, the detection such as general ammeter, water meter instrument is less after with screw installation to be repaired.And adding After the completion of tight, if attempting to screw out on screw, because the thread type of screw rod upper and lower part is different, between motion thread Resistance is smaller, is relatively also easy to produce rotation, therefore relative motion will occur between nut and screw rod when rotating, so as to solid The lead sealing bar being scheduled between joint and screw rod, which produces, pulls tearing effects, judges whether screw was unscrewed with this.

For the ease of the replacing of dispatch from the factory installation and later stage, lead sealing bar 4 is provided with gland 41, lead close to the side of screw rod 1 Strip of paper used for sealing 4 is fixedly connected with gland 41.The top of screw rod 1 is provided through the flat recess 11 at the top of screw rod 1, the side of flat recess 11 Face is obliquely installed, and the width of notch is less than bottom land, and gland 41 connects with the sliding of flat recess 11.

The rotation direction mark 213 screwed is provided with nut 2, to avoid grasping by mistake.

Embodiment 2：A kind of lead sealing internal lead sealing screw, as shown in Figures 3 and 4, is with the difference of embodiment 1, The structure of joint 3 is different.

Joint 3 includes base 36, steady arm 37 and upper frame 38, and base 36 is arranged on the top of screw rod 1, and lead sealing bar 4 is fixed Between the top of upper frame 38 and screw rod 1.

The locating part 34 that multiple radial slippages along screw rod 1 connect is provided with upper frame 38, is set on the inwall of access slot 22 There is the stopper slot 23 of annular, and the bottom land of access slot 22 is provided with the control terminal 24 for promoting locating part 34 to move radially.Locating part 34 be 4；In the center convergence of upper frame, one end of the convergence of locating part 34 is sphenocephaly for the end of locating part 34.

One end of the convergence of locating part 34, which is provided with, is fixed with wire drawing 35, and through the middle part of upper frame in base 36 and upper frame Converged between 38.

The bottom that the bottom of joint 3 is provided with joint 3 is provided with and stores groove 33；The top of screw rod 1 is provided with and stored groove 33 limited steps 12 coordinated.

When being installed before dispatching from the factory to screw rod 1 and nut 2, joint 3 is placed on the top of screw rod 1, nut 2 with Screw rod 1 mutually screws or close to when screwing, and the locating part 34 on joint 3 is close to control terminal 24 and controlled terminal 24 Promotion is docked with the groove of locating part 34, and rear joint 3 and the nut 2 of docking can not produce relative separation.

Embodiment 3：As shown in figure 5, it is with the difference of embodiment 2, the fixed form and fracture mode of lead sealing bar 4 Difference, and the selection condition of the material of lead sealing bar 4 is different, the lead sealing bar 4 needed for the present embodiment has stress pliable or fracture Characteristic.

Overall structure is that the top of screw rod 1 is provided with the rotation first 13 for being easy to clamp rotary screw 1, is set in rotation first 13 There is the perforation 14 extended radially through, access slot 22 is provided with the inwall of nut 2, spacing hole is provided through on the inwall of access slot 22 25, lead sealing bar 4 is located in perforation 14 and spacing hole 25, and spacing hole 25 is provided with welding in the opening outside nut 2 End socket 5.

When assembling is dispatched from the factory, first screw and nut 2 are mutually screwed, then penetrate lead sealing bar 4, afterwards with welding Mode blocks spacing hole 25, so as to form end socket 5.

Detection judges：After pushing on, if needing, to screw is screwed out, phase will occur between nut 2 and screw rod 1 To rotating, the stress of lead sealing bar 4 produces fracture or bending, is detected with this and judges whether screw was unscrewed.

Claims (6)

1. a kind of lead sealing screw, it is characterized in that：Including screw rod (1) and nut (2), the bottom of the screw rod (1) is provided with external Screw thread, the top of the screw rod (1) are threadedly coupled with the access slot (22) that nut (2) bottom is set, the spiral shell of screw rod (1) bottom Line is identical with the thread rotary orientation on top, and the screw thread of the screw rod (1) bottom is to couple screw thread, the spiral shell on screw rod (1) top Line is motion thread；The top of the screw rod (1) is provided with the perforation (14) extended radially through, on the inwall of the access slot (22) Spacing hole (25) is provided with, the lead sealing bar for being fixed with that stress is pliable or is broken is worn in the perforation (14) and spacing hole (25) (4)。

2. lead sealing screw according to claim 1, it is characterized in that：The spacing hole (25) runs through nut (2), and the limit Position hole (25) is provided with the end socket (5) of welding in the outside opening of nut (2).

3. lead sealing screw according to claim 1, it is characterized in that：The top of the screw rod (1), which is provided with, is easy to clamping to revolve Turn the rotation head (13) of screw rod (1), the perforation (14) is arranged on rotation head (13).

4. lead sealing screw according to claim 1, it is characterized in that：Cross recess is provided with the top of the nut (2) (21)。

5. lead sealing screw according to claim 4, it is characterized in that：The cross recess (21) include transverse groove (211) and Cannelure (212), the transverse groove (211) run through the side wall of nut (2).

6. lead sealing screw according to claim 1, it is characterized in that：The rotation direction mark screwed is provided with the nut (2) (213)。