Extrusion clamp for locking split sleeve of nuclear power installation taper sleeve

Abstract

The utility model provides a pair of extrusion pliers for locking a split sleeve of a nuclear power installation taper sleeve. The extrusion pliers comprise a high-pressure oil cylinder, a pliers seat, an upper jaw and a lower jaw which are sequentially arranged from top to bottom, a first through hole is formed in the middle of the clamp seat, the high-pressure oil cylinder is vertically, downwards and fixedly inserted in the upper portion of the first through hole, the clamp seat is fixedly connected with the lower jaw through a plurality of vertically-arranged guide columns, the upper jaw is arranged on the guide columns in a sliding mode, and a piston rod of the high-pressure oil cylinder is fixedly connected with the upper jaw. One end of the upper jaw and one end of the lower jaw are respectively provided with a reinforcing steel bar slot, the bottom of the reinforcing steel bar slot of the upper jaw and the top of the reinforcing steel bar slot of the lower jaw are respectively and fixedly provided with an extrusion die, and the two extrusion dies are oppositely arranged up and down. The high-pressure oil cylinder is adopted to drive the upper jaw and the lower jaw to move relatively, the two outer taper sleeves are extruded to move in a centering mode, extrusion force is large, the problem of repeated extrusion is effectively solved, and installation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel bar connection, in particular to an extrusion pliers for locking a split sleeve with a cone sleeve for nuclear power installation. Background Art

[0002] In the field of nuclear power, it is often necessary to reliably and quickly connect the upper steel bars with the lower steel bars. To solve this problem, the applicant has proposed a cone sleeve locking split sleeve and an extrusion installation tool thereof, such as Figure 1 and Figure 2 shown.

[0003] The cone sleeve locking split sleeve includes an inner ring locking piece and an outer cone sleeve; the inner ring locking piece is a split type, a petal-shaped structure composed of multiple locking pieces; the inner ring locking piece is used to buckle on the two butt-jointed steel wire heads to be connected, the inner surface of the inner ring locking piece is provided with an inner thread matching the outer thread of the steel wire heads to be connected, and the outer surfaces of both ends of the inner ring locking piece are cone surfaces; the outer cone sleeve is an integral structure, and there are two of them; the inner surface of the outer cone sleeve is an inner cone surface matching the outer cone surfaces at both ends of the inner ring locking piece; the two outer cone sleeves are respectively used to be sleeved on the ends of the two steel bars to be connected and can be squeezed to the two ends of the inner ring locking piece to lock the inner ring locking piece on the two steel wire heads to be connected.

[0004] The extrusion installation tool comprises a support sleeve, a fixed jaw fixedly arranged on the outer wall of one end of the support sleeve, and an extrusion oil cylinder fixedly arranged on the other end of the support sleeve, the piston rod of the extrusion oil cylinder is slidably arranged in the support sleeve, and the head of the piston rod is fixedly installed with a movable jaw; a slide groove is axially provided on the tube wall of the support sleeve, and the clamp handle of the movable jaw is slidably arranged in the slide groove; the movable jaw is arranged opposite to the fixed jaw, and a steel bar slot is provided on the outside of the movable jaw and the fixed jaw, and the width of the steel bar slot is smaller than the outer diameter of the outer cone sleeve. The outer cone sleeve slot is provided on the two opposite surfaces of the movable jaw and the fixed jaw.

[0005] When the cone sleeve locking split sleeve is used to connect two steel bars together, first, the two outer cone sleeves are respectively set on the ends of the steel bars A and B to be connected, and then the multiple locking pieces of the inner ring locking piece are arranged at intervals along the circumference of the steel bar body and buckled on the thread heads of the butted steel bars A and B to be connected, and the inner threads of the inner ring locking piece are meshed with the outer threads of the two steel bar thread heads; then the two outer cone sleeves are moved to the two ends of the inner ring locking piece and put on, and squeezed and locked using the extrusion installation tool shown in the figure. The steel bar slots on the movable jaws and the fixed jaws are respectively inserted into the steel bars A and B to be connected, and the outer cone sleeve slots of the movable jaws and the fixed jaws support the outer ends of the two outer cone sleeves respectively; start the extrusion cylinder to control the movable jaws to move in the direction of the fixed jaws, and then squeeze the outer cone sleeve toward the middle part of the inner ring locking piece to lock the inner ring locking piece on the two steel bars, and use the outer cone sleeve and the inner and outer cone surfaces on the inner ring locking piece to self-lock to complete the connection of the two steel bars.

[0006] However, the current extrusion installation tool has a relatively small extrusion force, and its movable jaw and fixed jaw cannot be squeezed into place at one time when extruding and installing the cone sleeve locking split sleeve. Multiple extrusions in multiple directions are required, which affects the installation efficiency. Furthermore, the movable jaw and the fixed jaw have low strength and a large sliding gap, which causes the upper and lower end surfaces of the cone sleeve locking split sleeve to be uneven after extrusion, affecting the connection strength. Utility Model Content

[0007] The technical problem to be solved by the utility model is to provide a squeezing pliers for locking split sleeves of nuclear power installation cone sleeves with high installation efficiency in view of the deficiencies of the prior art.

[0008] In order to solve the above technical problems, the present invention includes:

[0009] A kind of extrusion pliers for locking split sleeves of nuclear power installation cone sleeves, comprising a high-pressure oil cylinder, a pliers seat, an upper jaw and a lower jaw which are arranged in sequence from top to bottom; a first through hole is opened in the middle of the pliers seat, the high-pressure oil cylinder is fixedly inserted vertically downward in the upper part of the first through hole, the pliers seat is fixedly connected to the lower jaw by a plurality of vertically arranged guide columns, the upper jaw is slidably arranged on these guide columns, and the piston rod of the high-pressure oil cylinder is fixedly connected to the upper jaw; a steel bar slot is respectively opened at one end of the upper jaw and the lower jaw, and an extrusion die is respectively fixedly installed at the bottom of the steel bar slot of the upper jaw and the top of the steel bar slot of the lower jaw, and the two extrusion dies are arranged opposite to each other up and down.

[0010] Furthermore, the high-pressure oil cylinder includes a cylinder body and a piston rod; the cylinder body is screwed to the upper part of the first through hole by means of a thread; the lower end of the piston rod is provided with a pillow block and a plug-in cylinder in sequence downward, and the diameters of the piston rod, the pillow block and the plug-in cylinder become smaller in sequence; a threaded hole is provided on the bottom surface of the plug-in cylinder, and the upper jaw is fixedly sleeved on the plug-in cylinder.

[0011] Furthermore, a second through hole is respectively opened in the middle of the other end of the upper jaw and the lower jaw, and a plurality of guide holes are opened around the second through hole; the number of the guide columns is consistent with the number of the guide holes, and the bottom end of the guide column is fixedly inserted in the corresponding guide hole of the lower jaw; the plug-in cylinder is fixedly inserted in the second through hole of the upper jaw.

[0012] Furthermore, a self-lubricating bearing is installed in the guide hole of the upper jaw, and the guide column is slidably inserted in the corresponding self-lubricating bearing.

[0013] Furthermore, the steel bar slot includes a third through hole opened at one end of the upper jaw or the lower jaw and a first rectangular notch opened outside the third through hole.

[0014] Furthermore, an outward-expanding stepped groove is respectively provided at the bottom of the steel bar slot of the upper jaw and the top of the steel bar slot of the lower jaw for installing an extrusion die.

[0015] Furthermore, the extrusion die is U-shaped, and a rib and an extrusion groove are respectively provided on the outer side and the inner side of one end thereof.

[0016] Furthermore, a plurality of second notches are provided on the retaining edge, and a countersunk hole which is transparent from top to bottom is provided in the second notch.

[0017] Furthermore, a sleeve is vertically fixed to the bottom of the upper jaw, and a limit rod is inserted in the sleeve so as to slide up and down; a locking nut is provided at the pipe mouth of the sleeve for locking the limit rod.

[0018] Furthermore, a plurality of lifting rings are fixedly provided around the top of the clamp seat; an upper handle and a lower handle are fixedly provided on the outer sides of the clamp seat and the lower jaw, respectively.

[0019] The beneficial effects of the utility model are:

[0020] The utility model adopts a high-pressure oil cylinder to drive the upper jaw and the lower jaw to move relative to each other, squeezes the two outer cone sleeves to move in the center, has a large extrusion force, effectively solves the problem of multiple extrusions, and improves the installation efficiency; under the guide limit of the guide column, the piston rod of the high-pressure oil cylinder drives the upper jaw to move vertically downward. Due to the arrangement of multiple guide columns, the strength of the upper jaw is increased, and the deformation of the upper jaw is effectively suppressed; the design of the self-lubricating bearing effectively reduces the gap between the upper jaw and the guide column, solves the problem of uneven upper and lower end surfaces of the cone sleeve locking split sleeve after extrusion, and effectively improves the connection strength. A limit rod is installed at the bottom of the upper jaw to ensure that the cone sleeve locking split sleeve installed by extrusion is of the same height, the extrusion installation quality is high, and it is convenient for visual inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of an existing taper sleeve locking split sleeve;

[0022] Figure 2 It is a structural schematic diagram of an existing extrusion installation tool;

[0023] Figure 3 This is a schematic diagram of the installation of the extrusion pliers of the utility model;

[0024] Figure 4 It is a structural diagram of the high pressure oil cylinder;

[0025] Figure 5 It is a structural diagram of the clamp seat;

[0026] Figure 6 1 is a schematic diagram of the structure of the upper jaw;

[0027] Figure 7 It is a structural schematic diagram of an extrusion die;

[0028] In the figure: 101, outer cone sleeve, 102, inner ring locking piece, 103, steel bar A to be connected, 104, steel bar B to be connected, 201, extrusion cylinder, 202, support sleeve, 203, movable jaw, 204, fixed jaw; 1, high-pressure cylinder, 2, lifting ring, 3, clamp seat, 4, upper jaw, 5, extrusion die, 6, lower jaw, 7, round nut, 8, guide column, 9, limit rod, 10, locking nut, 11, sleeve, 12, lower handle, 13, self-lubricating bearing, 14, upper handle, 15, cone sleeve locking split sleeve, 16, upper steel bar, 17, lower steel bar. DETAILED DESCRIPTION

[0029] To facilitate understanding of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Those skilled in the art should understand that the embodiments are only intended to help understand the present invention and should not be considered as specific limitations of the present invention.

[0030] As attached Figure 3 As shown, the utility model provides a nuclear power installation cone sleeve locking split sleeve extrusion pliers, including a high-pressure oil cylinder 1, a pliers seat 3, an upper jaw 4 and a lower jaw 6 arranged in sequence from top to bottom; a first through hole 3-1 is opened in the middle of the pliers seat 3, and the high-pressure oil cylinder 1 is fixedly inserted vertically downward at the upper part of the first through hole 3-1, the pliers seat 3 and the lower jaw 6 are fixedly connected through a plurality of vertically arranged guide columns 8, the upper jaw 4 can be slidably arranged on these guide columns 8, and the piston rod 1-2 of the high-pressure oil cylinder 1 is fixedly connected to the upper jaw 4; one end of the upper jaw 4 and the lower jaw 6 is respectively opened with a steel bar slot 4-3, the steel bar slot 4-3 is transparent from top to bottom and open on the outside, so as to respectively insert the upper steel bar 16 and the lower steel bar 17. An extrusion die 5 is fixedly installed at the bottom of the steel bar slot 4-3 of the upper jaw 4 and the top of the steel bar slot 4-3 of the lower jaw 6, respectively, and the two extrusion dies 5 are arranged relatively up and down to respectively support the upper and lower outer sleeves and relatively squeeze them.

[0031] A plurality of lifting rings 2 are fixedly provided around the top of the clamp seat 3; an upper handle 14 and a lower handle 12 are fixedly provided on the outer sides of the clamp seat 3 and the lower jaw 6, respectively.

[0032] like Figure 3 As shown, a self-lubricating bearing 13 is installed in the guide hole 4-2 of the upper jaw 4, and the guide column 8 is slidably inserted in the corresponding self-lubricating bearing 13. By installing the self-lubricating bearing 13 in the guide hole 4-2 of the upper jaw 4, the gap between the upper jaw 4 and the guide column 8 can be effectively reduced, solving the problem of uneven upper and lower end surfaces of the cone sleeve locking split sleeve after extrusion, and effectively improving the connection strength.

[0033] like Figure 4 As shown, the high-pressure oil cylinder 1 includes a cylinder body 1-1 and a piston rod 1-2; the lower end of the piston rod 1-2 is provided with a pillow block 1-2-1 and a plug-in cylinder 1-2-2 in sequence, and the diameters of the piston rod 1-2, the pillow block 1-2-1 and the plug-in cylinder 1-2-2 are successively reduced; a threaded hole 1-2-3 is provided on the bottom surface of the plug-in cylinder 1-2-2, and the upper jaw 4 is fixedly sleeved on the plug-in cylinder 1-2-2. The high-pressure oil cylinder 1 transmits the extrusion force to the upper jaw 4.

[0034] like Figure 5 As shown, the clamp seat 3 is square, and the first through hole 3-1 passes through the center of the top and bottom surfaces thereof, and an internal thread is provided on the upper portion of the first through hole 3-1, and an external thread is provided at one end of the cylinder body 1-1 to be screwed into the first through hole 3-1. A plurality of countersunk threaded holes 3-2 are provided on the bottom surface of the clamp seat 3 and around the first through hole 3-1, and the number of the countersunk threaded holes 3-2 is the same as the number of the guide holes 4-2, and the top and bottom ends of the guide holes 4-2 are both provided with external threads. The top end of the guide hole 4-2 is screwed into the countersunk threaded hole 3-2 by threads.

[0035] like Figure 6 As shown, a second through hole 4-1 is respectively provided in the middle of the other end of the upper jaw 4 and the lower jaw 6, and a plurality of guide holes 4-2 are provided around the second through hole 4-1; the second through hole 4-1 is coaxial with the first through hole 3-1, and the number of guide columns 8 is consistent with the number of guide holes 4-2; the bottom end of the guide column 8 is inserted into the corresponding guide hole 4-2 of the lower jaw 6, and is fixed by a round nut 7 and a hexagonal nut respectively located above and below the guide hole 4-2; the plug-in cylinder 1-2-2 is fixedly inserted into the second through hole 4-1 of the upper jaw 4.

[0036] The steel bar slot 4-3 includes a third through hole opened at one end of the upper jaw 4 or the lower jaw 6 and a first rectangular notch opened outside the third through hole for avoiding the steel bar. The diameter of the third through hole is larger than the diameter of the steel bar. The bottom of the steel bar slot 4-3 of the upper jaw 4 and the top of the steel bar slot 4-3 of the lower jaw 6 are respectively provided with an outwardly expanded stepped groove 4-4 for installing the extrusion die 5.

[0037] like Figure 7 As shown, the extrusion die 5 is a horizontally arranged U-shaped structure, and the outer side and inner side of one end thereof are respectively provided with a rib 5-3 and an extrusion groove 5-2, which are used to support the outer sleeve and realize extrusion. The outer diameter of the main body of the extrusion groove 5-2 is equal to or slightly larger than the outer diameter of the outer sleeve, and the corresponding extrusion die 5 can be replaced according to the cone sleeve locking split sleeve 15 of different specifications. For the upper jaw 4, the rib 5-3 and the extrusion groove 5-2 are arranged at the bottom end of its extrusion die 5; for the lower jaw 6, the rib 5-3 and the extrusion groove 5-2 are arranged at the top end of its extrusion die 5. A plurality of second notches are provided on the rib 5-3, and a countersunk hole 5-1 that is transparent from top to bottom is provided in the second notch, and a threaded hole is provided at the corresponding position of the step groove 4-4, so that the extrusion die 5 can be fixed to the step groove 4-4 of the upper jaw 4 and the lower jaw 6 by bolts.

[0038] like Figure 1 As shown, a sleeve 11 is vertically fixed to the bottom of the upper jaw 4, and a limit rod 9 is inserted in the sleeve 11 so as to slide up and down; a locking nut 10 is provided at the pipe mouth of the sleeve 11, and the upper and lower positions of the limit rod 9 are adjusted according to the cone sleeve locking split sleeve 15 of different specifications, and then the locking nut 10 is used to realize the locking of the limit rod 9 and the sleeve 11.

[0039] The working principle of this utility model:

[0040] like Figure 1As shown, the cone sleeve locking split sleeve 15 is first pre-installed on the thread heads of the upper steel bar 16 and the lower steel bar 17, and then the upper jaw 4 and the lower jaw 6 of the extrusion pliers are respectively put on the upper and lower ends of the cone sleeve locking split sleeve 15 through the lower handle 12 and the upper handle 14, so that the upper and lower extrusion dies 5 are respectively fitted with the end faces of the upper and lower outer sleeves, and the upper and lower extrusion dies 5 are ensured to be concentric; then, the oil pump is started for remote clamping, and the rodless cavity of the high-pressure oil cylinder 1 enters the high-pressure oil, and the piston rod 1-2 drives the upper jaw 4 to move vertically downward under the guidance limit of the guide column 8. The upper extrusion die 5 continues to squeeze after it fits the end face of the upper outer sleeve. When the bottom of the limit rod 9 is against the top surface of the lower jaw 6, the pressure suddenly changes, and the pump station detects that the extrusion is in place, and the extrusion installation of the cone sleeve locking split sleeve 15 is completed. After that, the rod cavity of the high-pressure oil cylinder 1 enters the oil, and the extrusion pliers automatically resets, waiting for the extrusion installation of the next cone sleeve locking split sleeve 15.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A squeeze pliers for locking split sleeves of cone sleeves for nuclear power installation, characterized in that: The invention comprises a high-pressure oil cylinder (1), a clamp seat (3), an upper jaw (4) and a lower jaw (6) which are arranged in sequence from top to bottom; a first through hole (3-1) is provided in the middle of the clamp seat (3); the high-pressure oil cylinder (1) is fixedly inserted vertically downward at the upper part of the first through hole (3-1); the clamp seat (3) and the lower jaw (6) are fixedly connected via a plurality of vertically arranged guide columns (8); the upper jaw (4) is slidably arranged on these guide columns (8); and a piston rod (1-2) of the high-pressure oil cylinder (1) is fixedly connected to the upper jaw (4); one end of the upper jaw (4) and the lower jaw (6) are respectively provided with a steel bar slot (4-3); and an extrusion die (5) is fixedly installed at the bottom of the steel bar slot (4-3) of the upper jaw (4) and the top of the steel bar slot (4-3) of the lower jaw (6); the two extrusion dies (5) are arranged opposite to each other up and down.

2. The squeezing pliers for locking the split sleeve of the nuclear power installation cone sleeve according to claim 1 are characterized in that: The high-pressure oil cylinder (1) comprises a cylinder body (1-1) and a piston rod (1-2); the cylinder body (1-1) is screwed to the upper part of the first through hole (3-1) through a thread; a pillow block (1-2-1) and a plug-in cylinder (1-2-2) are sequentially arranged downward at the lower end of the piston rod (1-2), and the diameters of the piston rod (1-2), the pillow block (1-2-1) and the plug-in cylinder (1-2-2) are successively smaller; a threaded hole (1-2-3) is opened on the bottom surface of the plug-in cylinder (1-2-2), and the upper jaw (4) is fixedly sleeved on the plug-in cylinder (1-2-2).

3. The squeezing pliers for locking the split sleeve of the nuclear power installation cone sleeve according to claim 2 are characterized in that: A second through hole (4-1) is respectively provided in the middle of the other end of the upper jaw (4) and the lower jaw (6), and a plurality of guide holes (4-2) are provided around the second through hole (4-1); the number of the guide columns (8) is consistent with the number of the guide holes (4-2), and the bottom end of the guide column (8) is fixedly inserted in the corresponding guide hole (4-2) of the lower jaw (6); and the plug-in cylinder (1-2-2) is fixedly inserted in the second through hole (4-1) of the upper jaw (4).

4. The squeezing pliers for locking the split sleeve of the nuclear power installation cone sleeve according to claim 3 are characterized in that: A self-lubricating bearing (13) is installed in the guide hole (4-2) of the upper jaw (4), and the guide column (8) is slidably inserted in the corresponding self-lubricating bearing (13).

5. The squeezing pliers for locking the split sleeve of the nuclear power installation cone sleeve according to claim 1 are characterized in that: The steel bar slot (4-3) comprises a third through hole formed at one end of the upper jaw (4) or the lower jaw (6) and a first rectangular notch formed outside the third through hole.

6. A squeezing pliers for locking split sleeves of nuclear power installation cone sleeves according to claim 1 or 5, characterized in that: The bottom of the steel bar slot (4-3) of the upper jaw (4) and the top of the steel bar slot (4-3) of the lower jaw (6) are respectively provided with an outwardly expanded stepped groove (4-4) for installing an extrusion die (5).

7. The squeezing pliers for locking the split sleeve of the nuclear power installation cone sleeve according to claim 6 are characterized in that: The extrusion die (5) is U-shaped, and a rib (5-3) and an extrusion groove (5-2) are respectively arranged on the outer side and the inner side of one end thereof.

8. The squeezing pliers for locking the split sleeve of the nuclear power installation cone sleeve according to claim 7 are characterized in that: The retaining edge (5-3) is provided with a plurality of second notches, and a countersunk hole (5-1) which is transparent from top to bottom is provided in the second notch.

9. The squeezing pliers for locking the split sleeve of the nuclear power installation cone sleeve according to claim 1 are characterized in that: A sleeve (11) is vertically fixed to the bottom of the upper jaw (4), and a limit rod (9) is inserted into the sleeve (11) so as to slide up and down; a locking nut (10) is provided at the pipe mouth of the sleeve (11) for locking the limit rod (9).

10. The squeezing pliers for locking the split sleeve of the nuclear power installation cone sleeve according to claim 1 are characterized in that: A plurality of lifting rings (2) are fixedly arranged around the top of the clamp seat (3); an upper handle (14) and a lower handle (12) are fixedly arranged on the outer sides of the clamp seat (3) and the lower jaw (6), respectively.

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