Hoop

Abstract

The utility model provides a hoop which comprises a plurality of clamping pieces, the two ends of each clamping piece are provided with hinge portions, the number of the clamping pieces is three or more than three, and the hinge portions between the adjacent clamping pieces are hinged through hinge pieces to form a strip-shaped chain body. The clamping piece at the head end of the strip-shaped chain body and the clamping piece at the tail end of the strip-shaped chain body are in butt joint through a connecting mechanism to form an annular hoop body. A hooping groove formed in the circumferential direction of the annular hoop body is formed in the face, facing the center of the annular hoop body, of each clamping piece; a handle is hinged to the hinged portion of the clamping piece at the head end of the strip-shaped chain body, a hooping torsional spring is hinged to the hinged portion of the clamping piece at the tail end of the strip-shaped chain body, and the hooping torsional spring comprises a connecting section hinged to the clamping piece at the tail end of the strip-shaped chain body, a spiral section connected with the connecting section and a hanging buckle section connected with the spiral section. And a hanging buckle part is arranged on the handle. The clamping piece has the advantages that the clamping piece is indirectly hinged through the hinging piece, the degree of freedom of the clamping piece in the hooping process is improved, and the fitting performance is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of pipeline connecting accessories, in particular to a clamp. BACKGROUND

[0002] The clamp is a connecting device for connecting pipe fittings, valves and pipeline accessories, and is used for tightening the clamp between quick couplings.

[0003] The current clamp generally adopts multiple clamping pieces that are hingedly connected to each other, and then locked by a buckle to tighten. When tightening, each clamping piece is directly hingedly connected to each other, which restricts the swinging freedom of the clamping piece itself, and thus the fitting of the pipe joint is poor. Specifically, the tightening groove of the clamping piece is arc-shaped, and when the standard diameter range is tightened, the clamping piece can be overlapped with the joint. If the standard diameter range is deviated up and down when tightening, the clamping piece will be in tangential contact (the standard tightening diameter of the clamp is greater than the diameter of the joint, and the middle position of the tightening groove is in single point / line contact with the joint) or in external contact (the standard tightening diameter of the clamp is less than the diameter of the joint, and the two end positions of the tightening groove are in double point / line contact with the joint), which causes the adjacent clamping pieces to interfere with each other due to the direct hinging, affecting the contact of the single clamping piece. SUMMARY

[0004] In view of the above problems, the utility model aims to provide a clamp that indirectly hingedly connects the clamping pieces through the hinge pieces, improves the freedom of the clamping pieces when tightening, and improves the fitting.

[0005] To solve the above problems, the following technical scheme is provided: a clamp, comprising a plurality of clamping pieces, the clamping pieces are provided with hinge parts at both ends, the clamping pieces are three or more, the hinge parts between adjacent clamping pieces are hingedly connected by hinge pieces to form a strip chain body; the clamping piece at the head of the strip chain body is connected to the clamping piece at the tail of the strip chain body through a connecting mechanism to form a ring-shaped clamp body; one side of the clamping piece towards the center of the ring-shaped clamp body is provided with a tightening groove opened along the circumferential direction of the ring-shaped clamp body; the hinge part of the clamping piece at the head of the strip chain body is hingedly connected with a handle, and the hinge part of the clamping piece at the tail of the strip chain body is hingedly connected with a tightening torsion spring; the tightening torsion spring comprises a connecting segment hingedly connected with the clamping piece at the tail of the strip chain body, a spiral segment connected with the connecting segment for storing torsion, and a hanging buckle segment connected with the spiral segment for connection with the handle; the handle is provided with a hanging buckle part connected with the hanging buckle segment; when tightening, the handle is moved towards the outer wall of the clamping piece along the hinge point, the hanging buckle part swings around the hinge point, the clamping piece at the head of the ring-shaped clamp body and the clamping piece at the tail of the ring-shaped clamp body are moved towards each other, and the tightening torsion spring is pulled tight to achieve locking when passing through the dead point position.

[0006] The utility model further sets up, the hinged part is the groove that is set up in the split surface place of the clamping piece, the hinged piece is sheeted and is hinged in the hinged part through the pin.

[0007] The utility model further sets up, the hinged piece is provided with the recessed retreat cambered surface to the side of annular hoop body center, the retreat cambered surface axis is parallel with annular hoop body center axis.

[0008] The utility model further sets up, the handle is hinged in the hinged part of the clamping piece of strip chain body first end position through the pin;The connecting section is C-shaped and is equipped with the hook part in the end, the hook part is hinged in the hinged part of strip chain body tail end position clamping piece through the pin, and the C-shaped opening of the connecting section is towards the center direction of annular hoop body.

[0009] The utility model further sets up, the pin is cooperated and fixed with the clamping piece through interference.

[0010] The utility model further sets up, the hoop tight torsion spring is twisted into by a whole steel wire, including two parallelly arranged connecting sections, one helical section is connected to each connecting section, and the helical directions of the two helical sections are opposite to each other and the ends are away from each other and are connected through the hanging buckle section located at the outer side position of the helical rotation surface of the helical section.

[0011] The utility model further sets up, the clamping piece, the handle and the hinged piece are metal materials.

[0012] The utility model further sets up, the hoop slot both sides groove wall is inclined and is provided with V-shaped angle.

[0013] The utility model further sets up, the hoop slot still includes the groove bottom between the both sides groove wall.

[0014] The utility model has the advantages of:

[0015] 1, the clamping piece is mutually connected through the hinged piece, forms two hinged shafts between the adjacent clamping pieces, reduces the interference between the adjacent clamping pieces, improves the adaptability and the adhesion of joint;

[0016] 2, the clamping piece is three or more, to effectively share the extrusion on the joint, so that the hoop tight force acting on the circumferential direction of joint is more uniform;

[0017] 3, the hoop tight torsion spring formed by the connecting section, the helical section and the hanging buckle section can be twisted and stored when the connecting section and the hanging buckle section are stretched, so as to continuously provide reliable pre-tightening clamping force after the handle locks after passing the dead point position, and the hoop tight range is increased, which is suitable for various pipeline butt joint with vibration;

[0018] 4、 Handle can be cut by profile extrusion molding; clamping piece can be made by aluminum alloy casting or forging; hinged piece can be directly made by blanking; simple structure, easy to assemble. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a three-dimensional structure schematic view of the ring-shaped hoop body in a tightened state of the strip-shaped chain body of the utility model.

[0020] Figure 2 It is a three-dimensional structure schematic view of the ring-shaped hoop body in a loosened state of the strip-shaped chain body of the utility model.

[0021] Figure 3 It is a three-dimensional structure schematic view of the strip-shaped chain body in a first perspective view of an unfolded state of the strip-shaped chain body of the utility model.

[0022] Figure 4 It is a three-dimensional structure schematic view of the strip-shaped chain body in a second perspective view of an unfolded state of the strip-shaped chain body of the utility model.

[0023] Figure 5 It is a three-dimensional structure schematic view of the strip-shaped chain body of the utility model.

[0024] Figure 6 It is a three-dimensional structure schematic view of the strip-shaped chain body of the utility model.

[0025] Figure 7 It is a three-dimensional structure schematic view of the strip-shaped chain body of the utility model.

[0026] In the figure, the meaning of the reference numerals is as follows: 10 - clamping piece; 11 - hinged part; 12 - tightening groove; 121 - groove wall; 122 - groove bottom; 20 - hinged piece; 21 - retreat arc surface; 30 - handle; 31 - hanging buckle part; 40 - tightening torsion spring; 41 - connecting section; 411 - hook-shaped part; 42 - spiral section; 43 - hanging buckle section; 50 - pin. DETAILED DESCRIPTION

[0027] The specific implementation of the utility model will be described in further detail below in combination with the drawings and examples. The following examples are used to illustrate the utility model, but are not used to limit the scope of the utility model.

[0028] REFERENCE Figures 1 to 7 For example, as Figures 1 to 7The shown one kind of clamp, including several clamping pieces 10, the hinged part 11 is equipped with at both ends of clamping piece 10, clamping piece 10 is three or more, the hinged part 11 between adjacent clamping piece 10 is hinged to form strip chain body through hinged piece 20;The first end of strip chain body's clamping piece 10 and the tail end of strip chain body's clamping piece 10 between through connecting mechanism butt joint forms annular hoop body;The one side of clamping piece 10 towards annular hoop body center is equipped with the hoop slot 12 along the circumferential direction of annular hoop body is set up;The hinged part 11 of the first end of strip chain body's clamping piece 10 is hinged with handle 30, the hinged part 11 of the tail end of strip chain body's clamping piece 10 is hinged with hoop tight torsion spring 40, the hoop tight torsion spring 40 includes the connecting section 41 being hinged with the tail end of strip chain body's clamping piece 10, the spiral section 42 being connected with connecting section 41 for torsion energy storage and the hanging buckle section 43 being connected with spiral section 42 for being connected with handle 30, the hanging buckle part 31 being connected with hanging buckle section 43 is equipped on handle 30;When hoop tight, handle 30 is close to the outer wall of clamping piece 10 along the hinge point, makes the hanging buckle part 31 swing with the hinge point as the center to make the first end of annular hoop body's clamping piece 10 and the tail end of clamping piece 10 close to each other, and over the dead point position, tightens hoop tight torsion spring 40 and realizes lock.

[0029] In the above structure, the clamping piece 10 is arranged in several and connected to each other to form a strip chain body, and the first end and the tail end of the strip chain body are fixed by the connecting mechanism to make the clamping pieces 10 at the first end and the tail end of the strip chain body gradually close to each other, so that the radial dimension of the annular hoop body is reduced to hoop tight the butt joint; since the annular hoop body is composed of several clamping pieces 10, the adjacent clamping pieces 10 are connected by the hinged piece 20, so that the adjacent clamping pieces 10 change from one hinge point to two hinge points, the mutual influence between the clamping pieces 10 is reduced, more fitting freedom is provided for the clamping pieces 10, the hoop tight force is equally divided in the circumferential direction of the joint according to the number of the arc-shaped clamping pieces 10, better fitting effect is provided, the extrusion force on the joint is more uniform when the joint is hoop tight, the joint deformation is reduced, and the structure is simple, convenient to install and uniform in stress when hoop tight.

[0030] In the embodiment, the hinged part 11 is a groove opened in the middle surface of the clamping piece 10, and the hinged piece 20 is in a sheet shape and is hinged in the hinged part 11 by a pin 50.

[0031] In the above structure, the sheet-shaped connecting piece can reduce the groove width and improve the overall strength of the clamping piece 10.

[0032] In the embodiment, the hinged piece 20 is provided with a recessed retreat camber 21 on the side towards the center of the annular hoop body, and the axis of the retreat camber 21 is parallel to the center axis of the annular hoop body.

[0033] In the above structure, the joint outer wall is given space to avoid contact with the joint outer wall.

[0034] In the embodiment, the handle 30 is hinged in the hinge part 11 of the strip-shaped chain body head position clamping piece 10 through the pin 50; the connecting segment 41 is in a C shape as a whole and is provided with a hook-shaped part 411 at the end, the hook-shaped part 411 is hinged in the hinge part 11 of the strip-shaped chain body tail position clamping piece 10 through the pin 50, and the C-shaped opening of the connecting segment 41 faces the center direction of the annular hoop body.

[0035] In the above structure, the C-shaped opening of the connecting segment 41 is opened when the hoop is tightened, the tightening range is further improved, and interference with the clamping piece 10 and the handle 30 is avoided.

[0036] In the embodiment, the pin 50 is fixed with the clamping piece 10 through interference fit.

[0037] In the above structure, the handle 30, the tightening torsion spring 40 and the hinge part 20 are ensured to swing freely while avoiding the pin 50 from coming out.

[0038] In the embodiment, the tightening torsion spring 40 is twisted by a whole steel wire, including two connecting segments 41 arranged side by side, each of which is connected with a spiral segment 42, the spiral directions of the two spiral segments 42 are opposite to each other and the ends thereof are away from each other and are connected through a hanging buckle segment 43 located at the outside of the spiral rotation surface of the spiral segment 42; the hanging buckle segment 43 and the connecting segment 41 are arranged at an angle with the spiral axis of the spiral segment 42 as the center.

[0039] In the above structure, the connecting segments 41 arranged side by side are combined with the spiral segments 42 with opposite spiral directions and are connected through the hanging buckle segment 43, which can effectively stabilize the stress direction, the hanging buckle segment 43 and the connecting segment 41 are arranged at an angle with the spiral axis of the spiral segment 42 as the center, and the torsion effect of the torsion spring is used to ensure the clamping force.

[0040] In the embodiment, the clamping piece 10, the handle 30 and the hinge part 20 are all metal materials.

[0041] In the above structure, the clamping piece 10 and the handle 30 are preferably aluminum alloy materials to reduce the overall weight; since the hinge part 20 is in a sheet shape, the overall stress is relatively concentrated, so the hinge part 20 is preferably steel to ensure the strength.

[0042] In the embodiment, the two side groove walls 121 of the tightening groove 12 are arranged at a V-shaped angle.

[0043] In the above structure, the two side groove walls 121 of the tightening groove 12 are adapted to the joints, and with the increase of the tightening force, the two joints are pushed close to each other to realize butt joint and sealing.

[0044] In the embodiment, the tightening groove 12 further includes a groove bottom 122 between the two side groove walls 121.

[0045] In the structure, the groove bottom 122 is a plane or a circular arc, which can effectively reduce stress concentration and effectively reduce the radial size of the annular hoop body when butt joint with the same diameter joint.

[0046] The above is only the preferred embodiment of the present application, it should be pointed out that, for those skilled in the ordinary technical personnel in the art, without departing from the technical principles of the present application, under the premise of, can also make a number of improvements and variations, the above hypothetical these improvements and variations should also be considered as the protection scope of the present application.

Claims

1. A clamp comprising a plurality of clamping members, each of the clamping members having a hinge portion at each end, characterized in that: The clamping pieces are three or more, the hinge portions between adjacent clamping pieces are hingedly connected to form a strip chain body, the clamping piece at the head end of the strip chain body is connected to the clamping piece at the tail end of the strip chain body through a connecting mechanism to form a ring hoop body, one side of the clamping piece towards the center of the ring hoop body is provided with a hoop slot which is opened along the circumferential direction of the ring hoop body, the hinge portion of the clamping piece at the head end of the strip chain body is hingedly connected with a handle, the hinge portion of the clamping piece at the tail end of the strip chain body is hingedly connected with a hoop torsion spring, the hoop torsion spring comprises a connecting segment which is hingedly connected with the clamping piece at the tail end of the strip chain body, a spiral segment which is connected with the connecting segment and is used for torsion energy storage, and a hanging buckle segment which is connected with the spiral segment and is used for connection with the handle, the handle is provided with a hanging buckle portion which is connected with the hanging buckle segment, when the hoop is tightened, the handle is moved towards the outer wall of the clamping piece along the hinge point, the hanging buckle portion swings around the hinge point to make the clamping piece at the head end of the ring hoop body and the clamping piece at the tail end of the ring hoop body move towards each other, and the hoop torsion spring is pulled tight to achieve locking when passing through the dead point position.

2. A clamp according to claim 1, wherein: The hinge portion is a groove which is opened in the middle surface of the clamping piece, and the hinge piece is in the form of a sheet and is hingedly connected in the hinge portion through a pin.

3. A clamp according to claim 1 or 2, characterised in that: One side of the hinge piece towards the center of the ring hoop body is provided with a recessed retreat camber surface, and the axis of the retreat camber surface is parallel to the center axis of the ring hoop body.

4. A clamp as claimed in claim 2, wherein: The handle is hingedly connected in the hinge portion of the clamping piece at the head end position of the strip chain body through a pin, the connecting segment is in the form of C and is provided with a hook portion at the end, the hook portion is hingedly connected in the hinge portion of the clamping piece at the tail end position of the strip chain body through a pin, and the C-shaped opening of the connecting segment is towards the center direction of the ring hoop body.

5. A clamp according to claim 4, wherein: The pin and the clamping piece are connected through interference fit and fixation.

6. The collar of claim 1, wherein: The hoop torsion spring is twisted by a whole steel wire, comprises two connecting segments which are arranged side by side, each connecting segment is connected with a spiral segment, the spiral directions of the two spiral segments are opposite to each other and the ends thereof are away from each other and are connected through a hanging buckle segment which is located at the outside of the spiral rotation surface of the spiral segment, and the hanging buckle segment and the connecting segment are arranged at an angle around the spiral axis of the spiral segment.

7. The collar of claim 1 wherein: The clamping piece, the handle and the hinge piece are all made of metal.

8. The collar of claim 1, wherein: The groove walls on both sides of the hoop slot are arranged at a V-shaped angle.

9. A clamp according to claim 8, wherein: The hoop slot further comprises a groove bottom between the groove walls on both sides.

Images