Packing ring split shears

Abstract

The packing ring split shear of the present invention is composed of a fixed handle, a movable handle and a cutter. The front end of the fixed handle is fixed to one side of a cylindrical rubber ring frame as a whole. The movable handle is symmetrically installed on the other side of the rubber ring frame. A cylindrical rubber ring sleeve is fixed at the center of the rubber ring frame. A track frame is provided between the fixed handle and the movable handle. A knife holder is placed on the track frame. The knife holder is fixed to the movable handle. The cutter fixed on the knife holder passes through the knife groove of the rubber ring frame and is placed in the rubber ring groove. The packing ring split shear of the present invention has a reasonable structural design and is flexible and convenient to use. The cutter does not directly contact the worker's hand, which is safer during use. The overall device is not large and is more convenient to carry. It will not be delayed when there is a temporary cutting need, thereby greatly improving work efficiency.

Description

Technical Field

[0001] The invention belongs to a rubber ring cutter, in particular to a packing ring opening shear. Background Art

[0002] Oilfield operations often require packing for sealing various devices. Currently, oil workers typically cut packing using a hacksaw or blade. Holding the hacksaw or blade in one hand and pressing down on the packing with the other, they cut at a preset angle until all the packing to be replaced has been cut. This cutting method is difficult to control the cutting angle and can easily injure the hands. Existing electric packing cutting devices are also difficult to carry and lack flexibility. Summary of the Invention

[0003] The present invention aims to overcome the deficiencies of the prior art and provides a packing ring opening shear.

[0004] The packing ring opening shear of the present invention is composed of a fixed handle, a movable handle and a cutter. The front end of the fixed handle is fixed to one side of the rubber ring tube as a whole, and the movable handle is symmetrically installed on the other side of the rubber ring tube. A cylindrical limit platform is fixed at the center position of the rubber ring tube. A track frame is provided between the fixed handle and the movable handle. The knife holder is placed on the track frame. The knife holder is fixed to the movable handle. The cutter fixed on the knife holder passes through the knife groove of the rubber ring tube and is placed in the rubber ring groove.

[0005] As a further improvement of the present invention, a downward extension is provided on the other side of the rubber ring tube, and a front cover is provided on the front side of the fixed handle and the extension to be fixed thereto respectively, and the front end of the front cover coincides with the front circumference of the rubber ring tube, a track frame is fixed on the back of the front cover, and the tool holder is placed on the track frame, the front end of the movable handle is movably connected to the front cover, and the side of its front end has a connecting rod fixed thereto as a whole, and the connecting rod is fixed to the tool holder.

[0006] As a further improvement of the present invention, the fixed handle and the rear end of the extension are respectively fixed with rear covers, and the front end of the rear cover coincides with the back circumference of the rubber ring tube. The front end of the movable handle and the front cover and rear cover are all provided with corresponding pin holes through which the pin shaft can pass.

[0007] As a further improvement of the present invention, the knife holder is a U-shaped frame, and knife diagonal brackets are fixed on the diagonal directions of the vertical frames on both sides thereof for fixing the cutting knife.

[0008] As a further improvement of the present invention, the inclination angle of the knife bevel bracket is 30 to 60 degrees.

[0009] The packing ring opening shear of the present invention has a reasonable structural design, is flexible and convenient to use, and has a jaw-shaped design. The cutter will not directly contact the worker's hand during cutting, and the cutting angle is controllable. It is safer during use, and the overall device is small, light, and easy to carry. It will not be delayed when there is a temporary cutting need, which greatly improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a front structural diagram of the packing ring opening shear of the present invention;

[0011] Figure 2 It is a structural schematic diagram of the packing ring opening shear of the present invention with the rear cover plate removed from the back;

[0012] Figure 3 It is a front view of the tool holder of the present invention;

[0013] Figure 4 It is a structural schematic diagram of the tool holder of the present invention. DETAILED DESCRIPTION

[0014] The packing ring opening shear of the present invention is composed of a fixed handle 9, a movable handle 8 and a cutter 4. The design of the fixed handle 9 and the movable handle 8 is to design the cutter into a pliers-shaped structure. The front end of the fixed handle 9 is fixed to one side of the rubber ring tube 1 as a whole, and the other side of the rubber ring tube 1 is provided with a downward extension 15. A front cover 5 is provided on the front side of the fixed handle 9 and the extension 15, and the front end of the front cover 5 is consistent with the front circumference of the rubber ring tube 1. The rear end of the fixed handle 9 and the extension 15 is provided with a rear cover 7, and the front end of the rear cover 7 is consistent with the back circumference of the rubber ring tube 1. The front end of the movable handle 8 and the front cover 5 and the rear cover are respectively fixed. The plates 7 are each provided with corresponding pin holes through which the pin 6 can pass, so that the movable handle 8 can be opened and closed with the pin 6 as the axis, and is used to movably connect the movable handle 8 below the extension 15 between the front cover 5 and the rear cover 7; the lower end of the extension 15 is a bevel, and its inner side is lower than the outer side, and the upper end of the movable handle 8 is also a bevel, and its inner side is higher than the outer side, and the upper end of the movable handle 8 is connected with the lower end of the extension 15, and the movable handle 8 can be rotated with the pin 6 as the center.

[0015] A cylindrical stopper 2 is fixed at the center of the rubber ring barrel 1. A track frame 11 is provided between the fixed handle 9 and the movable handle 8 on the back of the front cover 5. The track frame 11 can be placed on the back of the front cover 5, on the rear cover 7, and on the bottom of the rubber ring barrel 1 between the fixed handle 9 and the extension 15. According to production requirements, the rubber ring barrel 1 can be designed into different sizes and models of cutters of different specifications to cut different types of packing.

[0016] Tracks are symmetrically arranged on the track frame 11, with both sides of the tool holder 10 placed on the tracks. When subjected to force, the tool holder 10 can slide along the tracks on the track frame 11. The tool holder 10 is a U-shaped frame, with diagonal blade supports 13 fixed to the vertical frames on both sides. The blade supports 13 have an inclination angle of 30 to 60 degrees, such as 45 degrees. The blade supports 13 are fixed to the cutter 4 by bolts. A blade groove 3 is opened on the rubber ring tube 1 at the same angle as the cutter 4. The blade groove 3 extends inward through the bottom of the rubber ring tube 1 and reaches the limit platform 2.

[0017] A connecting rod 12 is fixed integrally to the side of the front end of the movable handle 8, and a bolt connects the connecting rod 12 to the tool holder 10. During use, the movable handle 8 is opened, driving the tool holder 10 to move on the track frame 11, causing the cutter 4 to leave the rubber ring barrel 1. The packing to be cut is then placed on the limit plate 2 and placed in the rubber ring groove 14. The movable handle 8 is pressed downward, driving the connecting rod 12 and the tool holder 10 to move horizontally on the track frame 11. The cutter 4 fixed to the tool holder 10 is then forced to enter the knife groove 3 of the rubber ring barrel 1 and continue forward to cut the packing and place it in the knife groove of the limit plate 2, thus completing the packing cutting.

Claims

1. The packing ring opening shear is composed of a fixed handle (9), a movable handle (8) and a cutter (4), which is characterized by The front end of the fixed handle (9) is fixed to one side of the rubber ring tube (1) as a whole, and the other side of the rubber ring tube (1) is provided with an extension portion (15) fixed downwardly thereto as a whole, and a front cover plate (5) is provided on the front side of the fixed handle (9) and the extension portion (15), and the fixed handle (9) and the extension portion (15) are respectively fixed to the front cover plate (5), and the front end of the front cover plate (5) coincides with the circumference of the rubber ring tube (1), and the front end of the movable handle (8) is movably connected to the front cover plate (5); a cylindrical limit platform (2) is fixed at the center of the rubber ring tube (1) ), a track frame (11) is provided between the fixed handle (9) and the movable handle (8), a knife holder (10) is placed on the track frame (11), a connecting rod (12) fixed to the movable handle (8) on the side of its front end is fixed to the knife holder (10), and the connecting rod (12) is fixed to the knife holder (10); the cutter (4) fixed on the knife holder (10) passes through the knife groove (3) of the rubber ring tube (1) and is placed in the rubber ring groove (14); the knife holder (10) is a U-shaped frame, and a knife oblique bracket (13) is fixed on the diagonal direction of the vertical frame on both sides thereof for fixing the cutter (4); When in use, the movable handle (8) is opened to drive the tool holder (10) to move on the track frame (11), so that the cutter (4) leaves the rubber ring tube (1), and then the packing to be cut is placed on the limit table (2) and placed in the rubber ring groove (14). After pressing the movable handle (8), the connecting rod (12) and the tool holder (10) are driven to move horizontally on the track frame (11). After the cutter (4) fixed on the tool holder (10) is subjected to force, it enters the knife groove (3) of the rubber ring tube (1) and continues to cut the packing forward and is placed in the knife groove of the limit table (2), thus completing the packing cutting.

2. The packing ring opening shear according to claim 1, characterized in that A track frame (11) is fixed on the back of the front cover (5), and the tool holder (10) is placed on the track frame (11).

3. The packing ring opening shear according to claim 1, characterized in that A track frame (11) is vertically fixed on the rubber ring tube (1) between the fixed handle (9) and the movable handle (8), and the tool holder (10) is placed on the track frame (11).

4. The packing ring opening shear according to claim 2 or 3, characterized in that A rear cover plate (7) is provided at the rear end of the fixed handle (9) and the extension (15). The fixed handle (9) and the extension (15) are respectively fixed to the rear cover plate (7), and the front end of the rear cover plate (7) coincides with the back circumference of the rubber ring tube (1). The front end of the movable handle (8) and the front cover plate (5) and the rear cover plate (7) are all provided with corresponding pin holes that can pass through the pin shaft (6).

5. The packing ring opening shear according to claim 1, characterized in that The inclination angle of the knife oblique bracket (13) is 30 to 60 degrees.

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