Flange rapid butt-joint clamping mechanism

Abstract

The utility model discloses a rapid butt-joint clamping mechanism for flanges. The rapid butt-joint clamping mechanism comprises an inner pipeline, a supporting assembly, an inner screw assembly and an outer screw assembly. A plurality of supporting rods are arrayed on the periphery of the supporting assembly in the circumferential direction, and the guiding pieces are connected to the supporting rods in the axial direction. The supporting assembly is fixedly connected with one end of the inner pipeline; the outer part of the inner pipeline is connected with two limiting rings at intervals, and the inner screw rod assembly is movably connected to the outer part of the inner pipeline in a sleeving manner and is positioned between the two limiting rings; the outer screw rod assembly is in threaded connection with the outer part of the inner screw rod assembly; a plurality of clamping jaw assemblies are arrayed on the periphery of the outer screw assembly in the circumferential direction and hinged to the supporting rod. The sealing device has the advantages that firm sealing can be achieved only through one-time pressing, additional installation of bolts is not needed, efficiency is higher, reliability is better, and more labor is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a flange connection, especially a flange quick butt joint clamping mechanism. BACKGROUND

[0002] At present, the loading and unloading interface of low-temperature LNG tank truck generally adopts flange connection, and the flange connection has good sealing property and high reliability, but is complicated to disassemble and assemble, and time-consuming and laborious.

[0003] The information disclosed in this BACKGROUND section is only for the purpose of increasing the understanding of the background of the present utility model, and should not be regarded as acknowledging or implicitly implying that this information constitutes prior art known to those of ordinary skill in the art. SUMMARY

[0004] The utility model solves the technical problem that the flange connection needs multiple bolt tightening, which is time-consuming and laborious.

[0005] The utility model solves the above technical problem through the following technical scheme:

[0006] A flange quick butt joint clamping mechanism, comprising an inner pipeline, a support assembly, an inner screw rod assembly, and an outer screw rod assembly; the support assembly is peripherally arrayed with multiple support rods in the circumferential direction, and a guide piece is connected to the support rods in the axial direction; the support assembly is fixedly connected to one end of the inner pipeline; the outer part of the inner pipeline is connected with two limiting rings at intervals, and the inner screw rod assembly is movably sleeved on the outer part of the inner pipeline and located between the two limiting rings; the outer screw rod assembly is threadedly connected to the outer part of the inner screw rod assembly; the outer periphery of the outer screw rod assembly is arrayed with multiple claw assemblies in the circumferential direction, and the claw assemblies are hinged to the support rods.

[0007] The utility model discloses, inner screw rod assembly is limited between the limiting ring, axial position is defined, and the outer screw rod assembly is connected between inner screw rod assembly and is screwed, rotates inner screw rod assembly, because inner screw rod assembly can only rotate periphery, and claw subassembly is hinged with support rod, to make the outer screw rod assembly can only axial movement. When using, the sealing washer is supported and is close -fitted in the end of inner pipeline by the guide piece of support subassembly, moves along the interface flange of tank car, and the sealing surface of flange realizes the centering with sealing washer, when sealing washer and the sealing surface of flange almost contact, inner screw rod assembly rotates, and relative motion is formed with outer screw sleeve subassembly, drives claw subassembly to move, simultaneously makes multiple claw subassembly rotate around support rod, at this time, the end of claw subassembly can press the back of butt flange simultaneously, to make flange and sealing washer reliable compression tight. The utility model discloses, only need to compress once to realize firm sealing, make the connection reliability be higher than the flange that needs to repeat the screw bolt multiple times, improve the security of loading and unloading operation, and do not need additional mounting bolt, and the efficiency is higher, and the reliability is better, and it is more labor-saving.

[0008] Preferably, the inner pipeline further comprises two retaining rings, the two retaining rings are connected to the outer surface of the inner pipeline and located between the two limiting rings, and the two retaining rings are connected to the two limiting rings respectively, the cross section of the retaining ring is T-shaped, and the two ends of the inner screw rod assembly are overlapped on the retaining ring.

[0009] Preferably, the support assembly comprises a mounting ring, one end of the mounting ring is fixedly connected to the inner pipeline, the support rods are arranged along the circumference of the mounting ring, the end of the support rod away from the axis is in the shape of a U-shaped frame, and the claw subassembly is arranged in the U-shaped frame and hinged to the U-shaped frame.

[0010] Preferably, the guide piece is an L-shaped plate, one end of the short side of the guide piece is fixedly connected to the support rod, and the long side of the guide piece is parallel to the axis of the inner pipeline.

[0011] The guide piece is used for mounting the sealing washer on one side, and the four guide pieces are located at the periphery of the flange to realize the guiding effect.

[0012] Preferably, the inner screw rod assembly comprises an inner mounting sleeve and a hand wheel, the outer part of the inner mounting sleeve is provided with a thread, and the hand wheel is fixedly connected to the outer part of one end of the inner mounting sleeve.

[0013] Preferably, the outer screw rod assembly comprises an outer mounting sleeve, the outer surface of the outer mounting sleeve is arranged with a plurality of mounting supports, and one end of the claw subassembly is hinged to the mounting support of the outer mounting sleeve.

[0014] Preferably, the claw assembly comprises a connecting rod assembly, a claw body, a clamping block, one end of the connecting rod assembly is hinged to the mounting support of the outer mounting sleeve, the other end is hinged to one end of the claw body, the middle part of the claw body is hinged to the supporting rod, and the other end of the claw body is detachably connected with the clamping block.

[0015] Preferably, the claw body is bent downward at the end away from the connecting rod assembly, and the clamping block is connected to the bent end.

[0016] Preferably, the end of the clamping block is arc-shaped.

[0017] The clamping block is arc-shaped, which can always abut against the back surface of the flange, thereby ensuring the pressing effect.

[0018] Preferably, the connecting rod assembly comprises a first connecting rod, a spring and a second connecting rod, one end of the first connecting rod is hinged to the mounting support of the outer mounting sleeve, the other end is connected with the spring, the other end of the spring is connected with the first connecting rod, and the other end of the second connecting rod is hinged to the claw body.

[0019] The spring can compensate for the uneven position of the flange, thereby ensuring the sealing state of the sealing surface.

[0020] The utility model discloses the advantages are:

[0021] In the utility model, the inner screw rod assembly is limited between the limiting rings, the axial position is limited, the outer screw rod assembly and the inner screw rod assembly are connected through the thread, the inner screw rod assembly can only rotate circumferentially by rotating the inner screw rod assembly, and the claw assembly is hinged to the supporting rod, so that the outer screw rod assembly can only move axially. When using, the sealing gasket is supported by the guide of the supporting assembly and is tightly attached to the end of the inner pipeline, moves axially along the interface flange of the tank car, the sealing surface of the flange and the sealing gasket realize centering, when the sealing gasket almost contacts the sealing surface of the flange, the inner screw rod assembly rotates, forms relative movement with the outer screw sleeve assembly, drives the claw assembly to move, simultaneously makes multiple claw assemblies rotate around the supporting rod, at this time, the tail end of the claw assembly can press the back surface of the butt flange simultaneously, so that the flange and the sealing gasket are reliably pressed. The utility model only needs to press once to realize firm sealing, makes the connection reliability higher than the flange needing to be repeatedly screwed multiple times, improves the safety of loading and unloading operation, and does not need additional mounting bolts, and the efficiency is higher, the reliability is better, and the labor is saved.

[0022] The utility model discloses rely on the deformation of the simplest lever principle and the crank slider mechanism, realize the rotation movement of trapezoidal thread, convert into the rotation of dog of pressing tightly. The utility model discloses the bolt installation operation of at least needing repeating operation 4 times in prior art, converts into the rotation of pressing tightly once, greatly reduces the working strength of on -the -spot personnel, improves work efficiency, saves the preparation time of loading.

[0023] Four linkage dog components cooperate with the spring in connecting rod component simultaneously, and after the sealing surface of the dog is pressed tightly, the compressible spring has a pre-tightening effect on the flange, so that even if there is part uneven, the overall sealing performance will not be affected, and there will be no phenomenon of some dogs being unloaded, and the sealing performance is improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the structure schematic drawing of flange quick butt joint clamping mechanism of the utility model embodiment.

[0025] Figure 2 It is the structure schematic drawing of flanne quick butt joint clamping mechanism of the utility model embodiment.

[0026] Figure 3 It is Figure 2 The sectional view of A-A in Fig.

[0027] Figure 4 It is the connecting schematic drawing of inner pipeline and support assembly of the utility model embodiment.

[0028] Figure 5 It is the connecting schematic drawing of inner screw rod assembly and outer screw rod assembly of the utility model embodiment.

[0029] Figure 6 It is the working schematic drawing of flanne quick butt joint clamping mechanism of the utility model embodiment Figure 1 .

[0030] Figure 7 It is the working schematic drawing of flanne quick butt joint clamping mechanism of the utility model embodiment Figure 2 .

[0031] Figure 8 It is the working sectional view of flanne quick butt joint clamping mechanism of the utility model embodiment.

[0032] Mark in drawing:

[0033] 1, inner pipeline;11, limit ring;12, baffle ring;

[0034] 2, support assembly;21, installation ring;22, support rod;23, guide;

[0035] 3, inner screw rod assembly;31, inner installation sleeve;32, hand wheel;

[0036] 4, outer screw assembly; 41, outer mounting sleeve; 42, connecting rod assembly; 421, first connecting rod; 422, spring; 423, second connecting rod; 43, jaw body; 44, clamping block;

[0037] 5, gasket; 6, tank flange. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0039] Embodiment one:

[0040] As shown in Figure 1 , Figure 2 , Figure 3 A flange quick butt joint clamping mechanism, comprising an inner pipeline 1, a support assembly 2, an inner screw assembly 3, an outer screw assembly 4 and a gasket 5.

[0041] Referring to Figure 4 , Figure 7 simultaneously, the inner pipeline 1 is a cylindrical pipeline, the right end of the inner pipeline 1 is connected with the support assembly 2, and the other end can be connected with a pipeline flange, which is used to connect with other pipelines. Two limiting rings 11 are connected with the outer part of the inner pipeline 1 at intervals, and the two limiting rings 11 can be directly fixed on the outer surface of the inner pipeline 1, which can be welded. Two retaining rings 12 are also located on the outer part of the inner pipeline 1 and between the two limiting rings 11, and the two retaining rings 12 can be connected with the two limiting rings 11 through bolts, and at least one of the retaining rings 12 is T-shaped in cross section, as shown in Figure 3 The right side of the left retaining ring 12 extends a step, and the end of the inner screw assembly 3 is lapped on the extended step, so that the inner screw assembly 3 does not directly contact the inner pipeline 1, reducing the friction between them. The inner screw assembly 3 is movably sleeved on the outer part of the inner pipeline 1 and located between the two retaining rings 12, and the inner screw assembly 3 can rotate along the inner pipeline 1.

[0042] The support assembly 2 comprises a mounting ring 21, a plurality of support rods 22, and a guide 23. The mounting ring 21 is fixedly connected to one end of the inner pipeline 1. The support rods 22 are arranged in a circular array along the mounting ring 21. In this embodiment, there are four support rods 22, which are evenly arranged and diverge. The guide 23 is connected to the support rods 22 along the axial direction of the inner pipeline 1.

[0043] Specifically, the mounting ring 21 is a ring-shaped body with an inner diameter equal to the outer diameter of the inner pipeline 1, and the right end surface of the mounting ring 21 is in contact with the sealing gasket 5. The end of the support rod 22 away from the shaft is in the shape of a U-shaped bracket, and the claw body 43 is arranged in the U-shaped bracket and is hingedly connected thereto. In this embodiment, the hinge is connected by a shaft or a pin, and the claw body 43 can rotate along the shaft or the pin. The guide 23 is an L-shaped plate, one end of the short side of the guide 23 is fixedly connected to the support rod 22, and the long side of the guide 23 is parallel to the axis of the inner pipeline 1. There are four guides 23, and the outer side of the sealing gasket 5 in this embodiment is arrayed with four mounting lugs. The guide 23 passes through the mounting lug to support the sealing gasket 5.

[0044] The guide 23 is used to mount the sealing gasket 5, and the four guides 23 are located on the periphery of the tank truck interface flange 6 to achieve a guiding effect.

[0045] In combination Figure 5 As shown, the inner screw rod assembly 3 is limited between the outer portion of the inner pipeline 1 and the check ring 12 at both ends. The inner screw rod assembly 3 comprises an inner mounting sleeve 31 and a hand wheel 32. The outer portion of the inner mounting sleeve 31 is provided with threads (not shown in the figure, but there are threads on the actual product). The hand wheel 32 is fixedly connected to the outer portion of one end of the inner mounting sleeve 31. Rotating the hand wheel 32 can achieve the rotation of the inner mounting sleeve 31.

[0046] The outer screw rod assembly 4 is externally threadedly connected to the inner screw rod assembly 3. The threads can be trapezoidal threads.

[0047] The outer screw rod assembly 4 comprises an outer mounting sleeve 41 and a plurality of claw assemblies. The inner surface of the outer mounting sleeve 41 is provided with threads, so that the outer mounting sleeve 41 is threadedly connected to the inner mounting sleeve 31. The outer surface of the outer mounting sleeve 41 is connected to a plurality of mounting supports. One end of the claw assembly is hingedly connected to the mounting support of the outer mounting sleeve 41, and the middle part of the claw assembly is hingedly connected to the support rod 22.

[0048] In this embodiment, the claw assembly comprises a connecting rod assembly 42, a claw body 43, and a clamping block 44. One end of the connecting rod assembly 42 is hingedly connected to a mounting support of the outer mounting sleeve 41, and the other end is hingedly connected to one end of the claw body 43. The middle part of the claw body 43 is hingedly connected to the support rod 22. The clamping block 44 is detachably connected to the other end of the claw body 43.

[0049] Specifically, the claw body 43 is bent downward at the end away from the connecting rod assembly 42, so as to wrap around the back of the tank truck interface flange 6. The clamping block 44 is connected to the bent end.

[0050] The end of the clamping block 44 is arc-shaped. Regardless of the rotation of the claw body 43, the arc surface of the clamping block 44 always abuts against the back of the tank truck interface flange 6, thereby ensuring the pressing effect.

[0051] As shown in Figure 6 、 Figure 7 、 Figure 8 The principle of the present embodiment is as follows: Since the inner screw rod assembly 3 is limited between the check rings 12 and is movably connected to the inner pipeline 1, the axial position of the inner screw rod assembly 3 is limited, and only circumferential rotation can be achieved. Since the outer screw rod assembly 4 is threadedly connected to the inner screw rod assembly 3, the inner screw rod assembly 3 is rotated by the hand wheel 32. Since the claw body 43 is hingedly connected to the fixed support rod 22, the outer screw rod assembly 4 can only move axially, that is, the outer mounting sleeve 41 moves axially, thereby reducing the included angle between the connecting rod assembly 42 and the claw body 43. The claw body 43 and the support rod 22 form a lever, the left end of the claw body 43 is raised, and the right end is rotated downward, so that the clamping block abuts against the back of the tank truck interface flange 6. In this embodiment, the simplest lever principle and the deformation of the crank slider mechanism are used to convert the rotary motion of the trapezoidal thread into the rotary pressing of the claw.

[0052] In use, the sealing gasket 5 is supported by the guide 23 of the support assembly 2 and tightly abuts the end of the inner pipeline 1, and moves axially along the tank truck interface flange 6, the sealing surface of the tank truck interface flange 6 is centered with the sealing gasket 5, when the sealing gasket 5 is almost in contact with the sealing surface of the tank truck interface flange 6, the inner screw assembly 3 rotates to form relative movement with the outer screw sleeve assembly, drives the jaw assembly to move, and at the same time, rotates the plurality of jaw assemblies around the support rod 22, at this time, the tail end of the jaw assembly can simultaneously press the back surface of the butt joint tank truck interface flange 6, so that the tank truck interface flange 6 and the sealing gasket 5 are reliably pressed. The embodiment only needs to be pressed once to achieve firm sealing, so that the connection reliability is higher than that of the tank truck interface flange 6 which needs to be repeatedly tightened by bolts, improves the safety of loading and unloading operation, and does not need additional installation bolts, greatly reduces the working strength of the on-site personnel, improves the work efficiency, and saves the loading preparation time

[0053] Embodiment two

[0054] As shown in Figure 3 , Figure 5 , on the basis of embodiment one, the connecting rod assembly 42 comprises a first connecting rod 421, a spring 422 and a second connecting rod 423, one end of the first connecting rod 421 is hinged to the mounting support of the outer mounting sleeve 41, the other end is connected with the spring 422, the other end of the spring 422 is connected with the first connecting rod 421, and the other end of the second connecting rod 423 is hinged to the jaw body 43.

[0055] Specifically, as shown in Figure 3 , the bottom of the first connecting rod 421 is hinged to the mounting support, and the top is a cylindrical structure, and the second connecting rod 423 is a T-shaped structure, the bottom rod of the second connecting rod 423 is inserted into the cylindrical structure of the first connecting rod 421, so as to realize the connection between the first connecting rod 421 and the second connecting rod 423. The first connecting rod 421 and the second connecting rod 423 form a limiting space, and the spring 422 is installed in the limiting space, and the two ends of the spring 422 are connected with the top surface of the first connecting rod 421 and the stepped surface of the second connecting rod 423.

[0056] The spring 422 can be a disc spring, four linked claw assemblies, and a disc spring in the linkage assembly 42, after the claw body 43 is pressed against the tank interface flange 6, the compressible spring 422 has a pre-tightening effect on the tank interface flange 6, even if there is some unevenness, it will not affect the overall sealing performance, and there will be no phenomenon of some claw bodies 43 being unloaded, thereby improving the sealing performance. The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A flange quick butt clamping mechanism, characterized by, The inner pipe, the support assembly, the inner screw rod assembly, and the outer screw rod assembly are provided. The support assembly is fixedly connected to one end of the inner pipe. The inner pipe is externally connected with two limiting rings. The outer screw rod assembly is externally threadedly connected with the inner screw rod assembly.

2. The flange quick docking chucking mechanism according to claim 1, wherein, The outer screw rod assembly is externally provided with a plurality of claw assemblies.

3. The flange quick docking chucking mechanism according to claim 1, wherein, The inner pipe is externally provided with two stop rings.

4. The flange quick docking chucking mechanism according to claim 1, wherein, The support assembly is provided with a mounting ring.

5. The flange quick docking chucking mechanism according to claim 1, wherein, The guide is an L-shaped plate.

6. The flange quick docking chucking mechanism of claim 1, wherein, The inner screw rod assembly is provided with an inner mounting sleeve and a hand wheel.

7. A flange quick docking chucking mechanism according to claim 6, wherein The outer screw rod assembly is provided with an outer mounting sleeve.

8. A flange quick docking chucking mechanism according to claim 7, wherein The claw assembly is provided with a connecting rod assembly, a claw body, and a clamping block.

9. The flange quick docking chucking mechanism of claim 7, wherein, The claw body is downwardly bent at one end.

10. The flange quick docking chucking mechanism of claim 7, wherein, The clamping block is arc-shaped at one end. The connecting rod assembly is provided with a first connecting rod, a spring, and a second connecting rod.

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