CN206831004U - Rotary flange disk is locked - Google Patents

Abstract

The utility model discloses a rotary flange lock, which comprises a first flange, a second flange, bolts and nuts. The first flange is provided with a plurality of bolts with a diameter larger than that of the bolt screw and smaller than the diameter of the head of the bolt. The first through hole, the second flange is provided with a plurality of second through holes corresponding to the first through hole, the second through hole includes a large round hole and a small round hole in which the side walls communicate with each other, the nut is a wing nut, and the nut The diameter of one end is larger than the diameter of the small round hole and smaller than the diameter of the large round hole. The combination of the wing nut and the special-shaped hole makes the disassembly and assembly of the flange lock easier and labor-saving, and improves the installation efficiency. At the same time, the setting of the tapered hole on the special-shaped hole makes the nut The position between the flange and the flange is more fixed, and the positioning between the two flanges will be more precise based on the limiting effect of the bolt by another flange.

Description

Rotary Flange Lock

technical field

The utility model relates to the field of mechanical manufacturing, in particular to a rotary flange lock which can be easily disassembled.

Background technique

The flange connection structure is widely used in the butt joint of various pipelines due to its characteristics of large fastening force and good airtightness after installation, for example, the installation of spray pipes in the field of environmental protection and purification. At present, a large number of bolts and nuts are often used for manual installation of the blowing pipe, and the tightening force of the manual locking nuts is obviously not enough, and the assembly accuracy is not high enough, so tools such as wrenches are often used for locking. However, the working environment of the blowing pipe equipment is poor, and the space around which force can be applied is too small, and sometimes it is difficult to use tools to lock it. On the other hand, if the application of a large number of bolts and nuts requires supplementary tools, it is not only difficult to operate, but also consumes a lot of manpower and material resources, affecting normal production work and low efficiency.

Utility model content

The technical problem to be solved by the utility model is to provide a high-precision, easy-to-operate rotary flange lock that only needs to manually tighten the nut to ensure the fastening force.

For solving the problems of the technologies described above, the technical solution solution of the utility model is:

A rotary flange lock, which includes a first flange, a second flange, bolts and nuts, the first flange is provided with a plurality of first through holes with a diameter larger than the diameter of the bolt screw and smaller than the diameter of the bolt head, The second flange is provided with a plurality of second through holes corresponding to the first through holes. The second through holes include a large round hole and a small round hole. The large round hole and the small round hole communicate with each other from the side wall; the nut is butterfly Nut, the diameter of one end of the nut is larger than the diameter of the small round hole and smaller than the diameter of the large round hole. The combination of the wing nut and the special-shaped hole makes the disassembly and assembly of the flange lock easier and labor-saving.

Preferably, a smooth transition is made between the large circular hole and the small circular hole through a circular arc, so that the screw transfers between the large circular hole and the small circular hole more smoothly.

Preferably, the diameter of one end of the small round hole gradually expands to form a tapered hole, and the nut is provided with a tapered surface matching the tapered hole. The setting of the tapered hole can improve the positioning accuracy between the flanges.

Preferably, the nut is an integral structure consisting of a conical surface section and a force application section in turn, the third through hole axially penetrates the nut, the inner wall of the third through hole is threaded, and the diameter of the force application section is larger than the diameter of the small circular hole and smaller than The diameter of the circular hole is large, and a plurality of butterfly pieces are fixed on the outer surface of the force application section.

Preferably, the other end of the cone section is further provided with a positioning section, the diameter of which is smaller than the diameter of the small circular hole. The positioning section can improve the coaxiality between the bolt and the nut, and avoid thread jamming during tightening.

Preferably, two butterfly-shaped pieces are symmetrically distributed on the outer surface of the force application section.

After adopting the above scheme, because the utility model combines the butterfly nut and the special-shaped bolt hole, the locking and disassembly process between the flanges is more labor-saving and easy to operate, and the installation efficiency is improved. At the same time, the setting of the tapered hole on the special-shaped hole makes the nut and the flange The position between the two flanges is more fixed, and the positioning between the two flanges will be more precise based on the limiting effect of the bolts by another flange.

Description of drawings

Fig. 1 is an explosion diagram of the utility model;

Fig. 2 is an assembly drawing of the utility model;

Fig. 3 is a schematic diagram of the structure of the second flange of the utility model;

Fig. 4 is a schematic diagram of the structure of the first flange of the utility model;

Fig. 5 is an assembly drawing of the nut and the second flange of the present invention.

detailed description

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

The utility model discloses a rotary flange lock, as shown in Figure 1-5, which is a preferred embodiment of the utility model, which includes a first flange 1, a second flange 2 and a fastening The bolt 3 and the nut 4 connecting the flange piece, wherein the first flange 1 is provided with a plurality of first through holes 11, and the diameter of the first through hole 11 is larger than the diameter of the screw rod of the bolt 3 and smaller than the diameter of the head of the bolt 3. In the embodiment, there are four first through holes 11 evenly distributed. The second flange 2 is provided with a plurality of second through holes 21 corresponding to the first through holes 11. The second through holes 21 include a large circular hole 22 and a small circular hole 23. The large circular hole 22 and the small circular hole 23 are formed from The side walls communicate with each other, and the diameter of the small round hole 23 is greater than the diameter of the screw of the bolt 3, so the screw of the bolt 3 can be transferred between the large round hole 22 and the small round hole 23 when the flanges rotate relative to each other. In order to make the transfer of the screw more smooth, a smooth transition is designed between the large circular hole 22 and the small circular hole 23 through an arc.

Further, in order to avoid uneven stress on the flange during the tightening process of the nut 4 and the bolt 3 or the deviation of the nut 4 in the direction of the large circular hole 22 under the action of force, the diameter of one end of the small circular hole 23 gradually expands to form a tapered hole 24, and the corresponding , The nut 4 is provided with a tapered surface matching the tapered hole 24 .

The nut 4 used in this case is a butterfly nut, and the nut 4 is an integral structure composed of two sections of a conical surface section 41 and a force application section 42. The conical surface is arranged on the conical surface section 41, and a third through hole 43 runs through The nut 4 and the inner wall of the third through hole 43 are threads matched with the bolt 3 . Wherein, the diameter of the force application section 42 is greater than the diameter of the small circular hole 22 and smaller than the diameter of the large circular hole 23, so when the bolt 3 is aligned with the large circular hole 23, the nut 4 can exit through the large circular hole 23 together with the bolt 3, and when the bolt 3 When aligning with the small round hole 22 , the nut 4 can be clamped on the small round hole 22 . The butterfly nut is provided with a plurality of butterfly pieces 44 fixed on the outer surface of the force application section 42, and the nut 4 is tightened through the butterfly pieces 44 to obtain a larger torque, thereby better locking the nut 4 to avoid interface leakage. The design of the shape piece 44 can directly tighten the nut 4 by hand without using tools when the surrounding environment of the interface is bad and the space is small. In this embodiment, the outer surface of the force applying section 42 is only provided with symmetrically distributed Two butterfly pieces 44. The taper section 41 matches the taper hole 24 on the second flange 2, and the other end of the taper section 41 which is different from the force application section 42 can also be provided with a positioning section whose diameter is smaller than the diameter of the small circular hole 22. Therefore, the positioning section can go deep into the small round hole 22 so as to have a better coaxiality with the bolt 3 , and avoid the third through hole 43 from tilting and causing the thread to be stuck during rotation.

During use, the bolt 3 can be passed through the first through hole 11 of the first flange 1 in advance and the nut 4 can be screwed on. 24 on the other side, pass through the second flange 2 through the large round hole 22 in the second through hole 21, rotate the flange so that the nut 4 is aligned with the small round hole 23, and directly connect the bolt 3 to the small round hole 23 by rotating the butterfly piece 44. The nut 4 is locked, and the tapered hole 24 acts as a limit to the tapered section 41 of the nut 4, thereby improving the butt joint accuracy of the pipe fittings.

The above are only preferred embodiments of the present utility model, and are not intended to limit the technical scope of the present utility model. Therefore, any changes or modifications made according to the claims of the utility model and the specification should belong to the utility model. Within the scope covered by the utility model patent.

Claims (6)

1. a kind of rotary flange disk lock, it includes first flange, second flange, screw bolt and nut, it is characterised in that：Described One flange is provided with a plurality of diameters and is more than the bolt screw diameter and less than the first through hole of the bolt head diameter, described Second flange is provided with a plurality of the second through holes corresponding with the first through hole, and second through hole is small including a big hole and one Circular hole, the big hole communicate with each other with the small sircle hole from side wall；The nut is wing nut, and one end of the nut is straight Footpath is more than the diameter of the small sircle hole and less than the diameter of the big hole.

2. rotary flange disk lock according to claim 1, it is characterised in that：Lead between the big hole and the small sircle hole Cross circular arc and carry out rounding off.

3. rotary flange disk lock according to claim 1, it is characterised in that：The diameter of described small sircle hole one end gradually expands Big to form taper hole, the nut is provided with the conical surface matched with the taper hole.

4. rotary flange disk lock according to claim 3, it is characterised in that：The nut is successively by conical surface section and applying The integrative-structure of two sections of compositions of power section, third through-hole axially penetrate through the nut, and the third through-hole inwall is screw thread, described to apply Power section diameter is more than the roundlet bore dia and is less than the great circle bore dia, and a plurality of butterfly pieces are fixed on outside the force section Surface.

5. rotary flange disk lock according to claim 4, it is characterised in that：The conical surface section other end is additionally provided with necessarily Position section, the positioning section diameter are less than the diameter of the small sircle hole.

6. rotary flange disk lock according to claim 4, it is characterised in that：The force section outer surface is provided with symmetrical point Two butterfly pieces of cloth.