Separate ring clamp open end release mechanism with small pin pulling force and large preload force

Abstract

The invention discloses a separate annular clamp open end release mechanism with small pin pulling force and large pre-tightening force, which solves the problem of large pin pulling force requirement when releasing the annular clamp with large pre-tightening force. The invention comprises a T-shaped limit block (12) and two parallel plate frames (7) connected with a pin shaft, a left lower V-shaped swing rod (19) is arranged on the left lower V-shaped swing rod pin shaft (13), a right lower V-shaped swing rod is arranged on the right lower V-shaped swing rod pin shaft (14), a left middle hammer swing rod (20) is arranged on the left middle hammer swing rod pin shaft (15), a right middle hammer swing rod is arranged on the right middle hammer swing rod pin shaft (16), a left upper L-shaped swing rod (21) is arranged on the left upper L-shaped swing rod pin shaft (17), a right upper L-shaped swing rod is arranged on the right upper L-shaped swing rod pin shaft (18), a pin pulling column (22) is arranged between the left upper L-shaped swing rod and the right upper L-shaped swing rod, and a T-shaped limit block (12) is arranged between the left lower V-shaped swing rod (19) and the right lower V-shaped swing rod. The release process is simple and the device can be reused.

Description

Technical Field

[0001] The invention relates to an annular clamp, in particular to a release mechanism for an open end of the annular clamp. Background Art

[0002] The split annular clamp is composed of two semi-annular clamps, and the two semi-rings are arranged correspondingly. The butt joints of the two semi-annular clamps respectively form an open end and a fixed end. The fixed end is fixed on the supporting device of the annular clamp and is in a fixed closed state. A release mechanism is arranged at the open end. The release mechanism has two functions. One is that when the annular clamp embraces the product, it plays the role of connecting the two connecting plates at the open end together. The other is that when the clamp product needs to be released, it plays the role of separating the two connecting plates at the open end to facilitate the sliding release of the clamped product. In order to prevent the clamped cylindrical product from moving, the pre-tightening of the clamped product is generally achieved by adjusting the spacing between the upper and lower connecting plates at the open end. In order to achieve effective connection and separation, the prior art generally uses an explosive bolt as the release mechanism. By adjusting the nut on the explosive bolt, the pre-tightening force of the two semi-annular clamps is adjusted. When the cylindrical product needs to be released, the explosive bolt is blown off, so that the separation end of the annular clamp is opened, and the clamped cylindrical product is released; this structure has the problem that the explosion and release noise of the explosive bolt is large and the release mechanism cannot be reused. The prior art also uses a steel ball limit mechanism as a release mechanism, but the released steel ball of this mechanism is prone to jamming, especially when the steel ball limit mechanism is applied to the open end of the annular clamp, when the clamped cylinder is pre-tightened, lateral pressure will be generated, and this lateral force is more likely to cause the steel ball limit to fail when released. In addition, when the product being clamped requires a larger pre-tightening force, the steel ball limit mechanism cannot meet this requirement, because when the product requires a large pre-tightening force of the hoop, the limit pinning force of the steel ball limit mechanism is also required to be large, and the pinning mechanism that achieves a large pinning force is complex and difficult to meet the design requirements of the product. Summary of the invention

[0003] The invention provides a separate annular clamp open end release mechanism with small pin pulling force and large pre-tightening force, which solves the technical problem that a large pin pulling force is required when releasing an annular clamp with large pre-tightening force.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] A separate annular clamp open end release mechanism with small pin pulling force and large pre-tightening force comprises a T-shaped limit block and two parallel plate frames with pins inserted therethrough, a threaded pull rod is fixedly connected to the center of the lower bottom surface of the T-shaped limit block, a left lower V-shaped swing rod pin, a right lower V-shaped swing rod pin, a left middle hammer swing rod pin, a right middle hammer swing rod pin, an upper left L-shaped swing rod pin and an upper right L-shaped swing rod pin are respectively fixedly arranged between the front and rear parallel plates of the two parallel plate frames, and the left and right groups of pins are symmetrically arranged with the central vertical line of the two parallel plate frames in the upper and lower directions as the symmetry axis, a left lower V-shaped swing rod is arranged on the lower left V-shaped swing rod pin, a right lower V-shaped swing rod is arranged on the lower right V-shaped swing rod pin, and a A left middle hammer shaped pendulum, a right middle hammer shaped pendulum is arranged on the right middle hammer shaped pendulum pin shaft, an upper left L-shaped pendulum is arranged on the upper left L-shaped pendulum pin shaft, an upper right L-shaped pendulum is arranged on the upper right L-shaped pendulum pin shaft, a pin column is arranged between the upper left L-shaped pendulum and the upper right L-shaped pendulum, the lower end of the upper left L-shaped pendulum is top-connected with the upper end of the left middle hammer shaped pendulum, the lower end of the left middle hammer shaped pendulum is top-connected with the upper end of the lower left V-shaped pendulum, and the lower end of the lower left V-shaped pendulum is top-connected on the left wedge surface of the T-shaped limit block; the lower end of the upper right L-shaped pendulum is top-connected with the upper end of the right middle hammer shaped pendulum, the lower end of the right middle hammer shaped pendulum is top-connected with the upper end of the lower right V-shaped pendulum, and the lower end of the lower right V-shaped pendulum is top-connected on the right wedge surface of the T-shaped limit block.

[0006] A U-shaped notch is provided on the connecting plate at the open end of the upper half hoop, a through hole is provided on the connecting plate at the open end of the lower half hoop, a threaded pull rod is movably arranged in the through hole, and the diameter of the through hole is larger than the length of the T-shaped limit block, an adjusting nut for the pre-tightening force of the hoop is screwed on the lower end of the pull rod, and the adjusting nut is top-connected to the lower bottom surface of the connecting plate at the open end of the lower half hoop through a nut gasket; a left inverted L-shaped hook plate is fixedly provided at the left end of the top end surface of the two parallel plate frames, and a right inverted L-shaped hook plate is fixedly provided at the right end of the top end surface of the two parallel plate frames, the hook head of the left inverted L-shaped hook plate is hooked on the connecting plate at the open end of the upper half hoop on the left side of the U-shaped notch, and the hook head of the right inverted L-shaped hook plate is hooked on the connecting plate at the open end of the upper half hoop on the right side of the U-shaped notch.

[0007] The fulcrum of the upper left L-shaped rocker arm is the upper left L-shaped rocker arm pin, the vertical distance from the top connection point between the upper end of the upper left L-shaped rocker arm and the pin puller column to the central axis of the upper left L-shaped rocker arm pin constitutes the sixth lever arm, the vertical distance from the top connection point between the lower end of the upper left L-shaped rocker arm and the upper end of the left middle hammer-shaped rocker arm to the central axis of the upper left L-shaped rocker arm pin constitutes the fifth lever arm length, and the length of the sixth lever arm is greater than the length of the fifth lever arm; similarly, the fulcrum of the left middle hammer-shaped rocker arm is the left middle hammer-shaped rocker arm pin, and the length of the fourth lever arm with the left middle hammer-shaped rocker arm pin as the fulcrum is greater than the length of the third lever arm; the fulcrum of the lower left V-shaped rocker arm is the lower left V-shaped rocker arm pin, and the length of the second lever arm with the lower left V-shaped rocker arm pin as the fulcrum is greater than the length of the first lever arm.

[0008] The lower end of the lower left V-shaped swing arm is connected to the T-shaped limit block in a face-to-face combination form. A clearance groove is arranged on the inner end face of the lower left V-shaped swing arm to facilitate the release and fall-off of the T-shaped limit block after passing through the through hole.

[0009] The present invention realizes a large clamp preload force with a small pin pulling force, and the preload force can be fine-tuned by a nut. In particular, the release mechanism is not affected by the lateral force generated by the preload force, and the release process is simple, smooth, low-noise, and reusable. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the present invention;

[0011] Figure 2 It is a schematic diagram of the structure of the present invention after the two parallel plate frames 7 are hidden;

[0012] Figure 3 It is a coordination relationship diagram of the rocker mechanism of the present invention;

[0013] Figure 4 It is a torque transmission relationship diagram of the present invention. DETAILED DESCRIPTION

[0014] The present invention is described in detail below in conjunction with the accompanying drawings:

[0015] A separate annular clamp open end release mechanism with small pin pulling force and large pre-tightening force, comprising a T-shaped limit block 12 and two parallel plate frames 7 arranged parallel to each other in the up-down direction, a pin is inserted between the two parallel plate frames 7, a threaded pull rod 10 is fixedly connected at the center of the lower bottom surface of the T-shaped limit block 12, the T-shaped limit block 12 and the threaded pull rod 10 are an integral structure and are released and separated detachable parts. A lower left V-shaped swing rod pin 13, a lower right V-shaped swing rod pin 14, a left middle hammer swing rod pin 15, a right middle hammer swing rod pin 16, an upper left L-shaped swing rod pin 17 and an upper right L-shaped swing rod pin 18 are respectively fixedly arranged between the front and rear parallel plates of the two parallel plate frames 7, and the left and right two groups of pins are symmetrically arranged with the central vertical line of the two parallel plate frames 7 in the up-down direction as the symmetry axis, and the two parallel plate frames 7 are fixedly connected with each pin to form an integral support frame of a pin. A lower left V-shaped swing rod 19 is arranged on the lower left V-shaped swing rod pin 13, a lower right V-shaped swing rod is arranged on the lower right V-shaped swing rod pin 14, a left middle hammer-shaped swing rod 20 is arranged on the left middle hammer-shaped swing rod pin 15, a right middle hammer-shaped swing rod is arranged on the right middle hammer-shaped swing rod pin 16, an upper left L-shaped swing rod 21 is arranged on the upper left L-shaped swing rod pin 17, and an upper right L-shaped swing rod is arranged on the upper right L-shaped swing rod pin 18; a pin pulling column 22 is arranged between the upper left L-shaped swing rod 21 and the upper right L-shaped swing rod, the lower end of the upper left L-shaped swing rod 21 is connected to the upper end of the left middle hammer-shaped swing rod 20, and the left middle hammer-shaped swing rod 2 0 is top-connected with the upper end of the lower left V-shaped swing rod 19, and the lower end of the lower left V-shaped swing rod 19 is top-connected on the left wedge surface of the T-shaped limit block 12; the lower end of the upper right L-shaped swing rod is top-connected with the upper end of the right middle hammer-shaped swing rod, the lower end of the right middle hammer-shaped swing rod is top-connected with the upper end of the lower right V-shaped swing rod, and the lower end of the lower right V-shaped swing rod is top-connected on the right wedge surface of the T-shaped limit block 12; the pin-pulling column 22 is the release motive force of the entire release mechanism. After the pin-pulling column 22 is pulled out, the limit of the entire swing rod mechanism is released in sequence from top to bottom, which eventually causes the T-shaped limit block 12 to fall off from the limit of the swing rod mechanism to complete the release action.

[0016] A U-shaped notch 6 is provided on the connecting plate 4 at the open end of the upper half of the hoop, and a through hole 9 is provided on the connecting plate 5 at the open end of the lower half of the hoop. A threaded pull rod 10 is movably arranged in the through hole 9, and the caliber of the through hole 9 is greater than the length of the T-shaped limit block 12. An adjusting nut 11 of the hoop preload force is screwed on the lower end of the pull rod 10, and the adjusting nut 11 is connected to the lower bottom surface of the connecting plate 5 at the open end of the lower half of the hoop through a nut gasket; a left inverted L-shaped hook plate 8 is fixedly provided at the left end of the top end surface of the two parallel plate frames 7, and a right inverted L-shaped hook plate is fixedly provided at the right end of the top end surface of the two parallel plate frames 7, the hook head of the left inverted L-shaped hook plate 8 is hooked on the upper half of the hoop open end connecting plate 4 on the left side of the U-shaped notch 6, and the hook head of the right inverted L-shaped hook plate is hooked on the upper half of the hoop open end connecting plate 4 on the right side of the U-shaped notch 6. The adjusting nut 11 has the function of fine-tuning the pre-tightening force of the annular hoop. When the adjusting nut 11 is tightened, as the adjusting nut 11 rotates, the pull rod 10 is pulled downward, and the pull rod 10 pulls the T-shaped limit block 12 downward. The downward pulling force of the T-shaped limit block 12 pulls the two parallel plate frames 7 downward through the rocker pins, and the bottom surfaces of the inner ends of the inverted L-shaped hook plates 8 on the two parallel plate frames 7 are pressed against the upper half of the annular hoop opening end connecting plates 4 on both sides of the U-shaped notch 6, so that the upper half of the annular hoop 1 is pre-tightened downward; since a fixed port 3 and an open port are respectively provided between the upper half of the annular hoop 1 and the lower half of the annular hoop 2, and the fixed port 3 is the supporting end of the entire annular hoop, it is fixed on the equipment and is in an unadjustable state, and the tightening of the open port causes the upper half of the annular hoop 1 and the lower half of the annular hoop 2 to clamp, thereby achieving the effect of clamping the clamped cylindrical product.

[0017] The fulcrum of the upper left L-shaped swing rod 21 is the upper left L-shaped swing rod pin 17, and the vertical distance from the top connection point between the upper end of the upper left L-shaped swing rod 21 and the pin pulling column 22 to the central axis of the upper left L-shaped swing rod pin 17 constitutes a sixth force arm L6, and the vertical distance from the top connection point between the lower end of the upper left L-shaped swing rod 21 and the upper end of the left middle hammer-shaped swing rod 20 to the central axis of the upper left L-shaped swing rod pin 17 constitutes a fifth force arm length L5, and the length of the sixth force arm L6 is greater than the length of the fifth force arm length L5; the fulcrum of the left middle hammer-shaped swing rod 20 is the left middle hammer-shaped swing rod pin 15, and the vertical distance between the top connection point between the upper end of the left middle hammer-shaped swing rod 20 and the lower end of the upper left L-shaped swing rod 21 and the central axis of the left middle hammer-shaped swing rod pin 15 constitutes a force arm length L4 that is greater than the vertical distance between the top connection point between the lower end of the left middle hammer-shaped swing rod 20 and the upper end of the lower left V-shaped swing rod 19 and the left middle hammer-shaped swing rod The vertical distance between the top connection point of the upper end of the left middle hammer-shaped swing rod 20 and the center axis of the lower V-shaped swing rod pin 13 forms a force arm length L3; the force arm length L2 formed by the vertical distance between the top connection point of the upper end of the lower left V-shaped swing rod 19 and the lower end of the left middle hammer-shaped swing rod 20 and the center axis of the lower V-shaped swing rod pin 13 is greater than the force arm length L1 formed by the vertical distance between the top connection point of the lower end of the lower left V-shaped swing rod 19 and the left side of the inverted T-shaped limit block 12 and the center axis of the lower V-shaped swing rod pin 13; the force on the top connection point of the upper end of the lower left V-shaped swing rod 19 is less than the force on the top connection point of the lower end of the lower left V-shaped swing rod 19; thereby achieving the goal of releasing the limit of the T-shaped limit block 12 with a large preload force with a very small pin pulling force. The proportional relationship among L1, L2, L3, L4, L5 and L6 can be designed and adjusted according to the ratio of the limiting pre-tightening force of the T-shaped limiting block 12 and the pin pulling force of the pin pulling column 22.

[0018] The lower end of the lower left V-shaped swing arm 19 is top-connected with the inverted T-shaped limit block 12 in a face-to-face combination form, and a clearance groove is provided on the inner end surface of the lower left V-shaped swing arm 19 to facilitate the release and fall-off of the inverted T-shaped limit block 12.

Claims

1. A separate type annular clamp open end release mechanism with small pin pulling force and large pre-tightening force, comprising a T-shaped limit block (12) and two parallel plate frames (7) arranged parallel to each other in the up-down direction, a pin shaft passing through the two parallel plate frames (7), a threaded pull rod (10) fixedly connected at the center of the lower bottom surface of the T-shaped limit block (12), and a left lower V-shaped swing rod pin shaft (13), a right lower V-shaped swing rod pin shaft (14), and a left middle hammer swing rod pin shaft are respectively fixedly arranged between the front and rear parallel plates of the two parallel plate frames (7). (15), a right middle hammer-shaped swing rod pin (16), an upper left L-shaped swing rod pin (17) and an upper right L-shaped swing rod pin (18), a left group of pins consisting of a lower left V-shaped swing rod pin (13), a left middle hammer-shaped swing rod pin (15) and an upper left L-shaped swing rod pin (17) and a right group of pins consisting of a lower right V-shaped swing rod pin (14), a right middle hammer-shaped swing rod pin (16) and an upper right L-shaped swing rod pin (18) are symmetrically arranged with the center line of the parallel plate frame (7) in the vertical direction as the symmetry axis, characterized in that: A left lower V-shaped swing rod (19) is arranged on the left lower V-shaped swing rod pin (13), a right lower V-shaped swing rod is arranged on the right lower V-shaped swing rod pin (14), a left middle hammer-shaped swing rod (20) is arranged on the left middle hammer-shaped swing rod pin (15), a right middle hammer-shaped swing rod is arranged on the right middle hammer-shaped swing rod pin (16), a left upper L-shaped swing rod (21) is arranged on the left upper L-shaped swing rod pin (17), a right upper L-shaped swing rod is arranged on the right upper L-shaped swing rod pin (18), and a pull-out member is arranged between the left upper L-shaped swing rod (21) and the right upper L-shaped swing rod. The pin (22) is connected to the upper end of the left upper L-shaped swing rod (21) and the upper end of the left middle hammer-shaped swing rod (20), the lower end of the left middle hammer-shaped swing rod (20) and the upper end of the lower left V-shaped swing rod (19) are connected together, and the lower end of the lower left V-shaped swing rod (19) is connected to the left wedge surface of the T-shaped limit block (12); the lower end of the upper right L-shaped swing rod is connected to the upper end of the right middle hammer-shaped swing rod, the lower end of the right middle hammer-shaped swing rod is connected to the upper end of the lower right V-shaped swing rod, and the lower end of the lower right V-shaped swing rod is connected to the right wedge surface of the T-shaped limit block (12).

2. A separate annular clamp open end release mechanism with small pin pulling force and large pre-tightening force according to claim 1, characterized in that: A U-shaped notch (6) is provided on the connecting plate (4) at the open end of the upper half hoop, a through hole (9) is provided on the connecting plate (5) at the open end of the lower half hoop, a threaded pull rod (10) is movably arranged in the through hole (9), and the diameter of the through hole (9) is larger than the length of the T-shaped limit block (12), and an adjusting nut (11) for pre-tightening force of the hoop is screwed on the lower end of the pull rod (10), and the adjusting nut (11) is connected to the open end of the lower half hoop through a nut gasket On the lower bottom surface of the connecting plate (5); a left inverted L-shaped hook plate (8) is fixedly arranged at the left end of the top end surface of the two parallel plate frames (7); a right inverted L-shaped hook plate is fixedly arranged at the right end of the top end surface of the two parallel plate frames (7); the hook head of the left inverted L-shaped hook plate (8) is hooked on the upper half of the encircling hoop opening end connecting plate (4) on the left side of the U-shaped notch (6); and the hook head of the right inverted L-shaped hook plate is hooked on the upper half of the encircling hoop opening end connecting plate (4) on the right side of the U-shaped notch (6).

3. A separate annular clamp open end release mechanism with small pin pulling force and large pre-tightening force according to claim 1 or 2, characterized in that: The fulcrum of the upper left L-shaped swing rod (21) is the upper left L-shaped swing rod pin (17). The vertical distance from the top connection point between the upper end of the upper left L-shaped swing rod (21) and the pin puller (22) to the central axis of the upper left L-shaped swing rod pin (17) constitutes the sixth force arm (L6). The vertical distance from the top connection point between the lower end of the upper left L-shaped swing rod (21) and the upper end of the left middle hammer-shaped swing rod (20) to the central axis of the upper left L-shaped swing rod pin (17) constitutes the fifth force arm length (L5). The length of the sixth force arm (L6) is The length of the fourth lever arm (L4) is greater than the length of the third lever arm (L3); the fulcrum of the left middle hammer shaped swing rod (20) is the left middle hammer shaped swing rod pin (15), and the length of the fourth lever arm (L4) with the left middle hammer shaped swing rod pin (15) as the fulcrum is greater than the length of the third lever arm (L3); the fulcrum of the lower left V-shaped swing rod (19) is the lower left V-shaped swing rod pin (13), and the length of the second lever arm (L2) with the lower left V-shaped swing rod pin (13) as the fulcrum is greater than the length of the first lever arm (L1).

4. A separate annular clamp open end release mechanism with small pin pulling force and large pre-tightening force according to claim 3, characterized in that: The lower end of the left lower V-shaped swing rod (19) is connected to the T-shaped limit block (12) in a face-to-face combination form, and a clearance groove is provided on the inner end surface of the left lower V-shaped swing rod (19) to facilitate the release and fall-off of the T-shaped limit block (12) after passing through the through hole (9).

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