Handle reversing device of screw-on machine

Abstract

A handle reversing device of a screw-on machine comprises a steering seat, a steering rod is installed in the steering seat, a semicircular limiting baffle for achieving screw-off on a main clamp of the screw-on machine is arranged on the steering rod, a steering wheel with a handle is installed on the steering rod, and the steering wheel drives the steering rod to rotate in the steering seat by moving the handle on the steering wheel. And reversing of the semicircular limiting baffle on the steering rod is completed, so that screwing-on and screwing-off of the main pliers of the screwing-on machine are achieved. Reversing is completed by moving the handle on line, the reversing mode of inserting and pulling a plug pin of an existing screw-on machine is abandoned, convenient reversing is achieved, time and labor are saved, and safety and reliability are achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of the machinery industry and relates to a handle reversing device for a screwing machine. Background Art

[0002] In the production industry of steel pipes and casing pipes, it is often necessary to perform screwing operations on the produced casing pipes and mandrels. The coupling screwing machine is used for screwing the casing pipe and the coupling, and the mandrel screwing machine is used for screwing the mandrel. No matter which screwing machine, as long as it is connected by threads, the make-up and break-out operations need to be completed, which requires a reversing device to achieve this function. The existing reversing form of inserting and pulling out the pin of the screwing machine can achieve the reversing function, but there is a contact friction force between the reversing pin and the main body of the main clamp of the screwing machine. The labor intensity of the inserting and pulling operations is large, the operation is cumbersome, time-consuming and laborious, and there are certain safety hazards. There is an urgent need for a portable reversing device in the current oil casing pipe factory to reduce the labor intensity of the operators, reduce the safety risk, and improve the operation efficiency of screwing. Summary of the Invention

[0003] The purpose of the present invention is to provide a handle reversing device for a screwing machine, which has convenient reversing operation, saves time and effort, and is safe and reliable.

[0004] In order to achieve the above purpose, the technical solution adopted by the present invention is as follows: A handle reversing device for a screwing machine, the handle reversing device includes a steering seat, and the steering seat is installed on the jaw plate frame; a steering rod is rotatably installed in the steering seat, and a semicircular limit baffle is provided at the lower end of the steering rod, and the semicircular limit baffle is adapted to a reversing pin installed on a large gear ring; the upper end of the steering rod is connected to a steering wheel, and a handle is installed at the other end of the steering wheel.

[0005] A spring and a cylindrical pin are sequentially installed in the steering wheel, and the other end of the cylindrical pin is adapted to an annular groove on the outer circumference of the steering seat or a limit deep circular groove symmetrically arranged in the annular groove.

[0006] The reversing pin is limited by a pin slot opened on the jaw plate frame.

[0007] By moving the handle on the steering wheel, the cylindrical pin squeezes the spring to disengage from the limit deep circular groove on the steering seat and slides on the circular ring chute, so that the steering wheel drives the steering rod to rotate in the steering seat until the cylindrical pin slides into another limit deep circular groove, completing the reversing of the semicircular limit baffle on the steering rod.

[0008] The present invention completes the reversing by moving the handle online, abandons the existing reversing form of inserting and pulling out the pin of the screwing machine, realizes convenient reversing, saves time and effort, and is safe and reliable. The specific effects are as follows: 1. The structure of the present invention is simple, the scheme is easy to implement, reduces the labor intensity of workers, and saves time and effort.

[0009] 2. It solves the problem of low efficiency in the operator inserting and removing the plug for commutation, improves labor productivity, and reduces safety risks.

[0010] 3. It solves the problem of the make-and-break commutation on the pipe wrenching machine, and is a new type of and efficient pipe wrenching machine handle commutation device. Description of the Drawings

[0011] Figure 1 It is a schematic structural view of the present invention; Figure 2 It is a schematic view of the main clamp part of the pipe wrenching machine of the present invention; Figure 3 It is a schematic side view structure of the present invention installed on the pipe wrenching machine; Description of the reference numerals: handle 1, spring 2, cylindrical pin 3, limit deep circular groove 4, steering rod 5, steering wheel 6, steering seat 7, ring groove 8, semi-circular limit baffle 9, jaw plate frame 10, commutation pin 11, large gear ring 12, pin slot 13, tension spring 14, jaw plate 15, slope plate 16. Detailed Embodiments

[0012] The present invention will be further described below in conjunction with the drawings.

[0013] As shown in Figure 1 , Figure 2 , Figure 3 A handle commutation device for a pipe wrenching machine includes a steering seat 7, and the steering seat 7 is installed on the jaw plate frame 10; the steering rod 5 is rotatably installed in the steering seat 7, and a semi-circular limit baffle 9 for realizing the make-and-break of the main clamp of the pipe wrenching machine is provided at the lower end of the steering rod 5, and the semi-circular limit baffle 9 is adapted to a commutation pin 11 installed on a large gear ring 12; the upper end of the steering rod 5 is connected to a steering wheel 6, and a handle 1 is installed at the other end of the steering wheel 6. By moving the handle 1 on the steering wheel 6, the steering wheel 6 drives the steering rod 5 to rotate in the steering seat 7, and the semi-circular limit baffle 9 on the steering rod 5 is commutated, so as to realize the make-and-break of the main clamp of the pipe wrenching machine.

[0014] As shown in Figure 1 , a spring 2 and a cylindrical pin 3 are sequentially installed in the steering wheel 6, and the other end of the cylindrical pin 3 is adapted to a ring groove 8 on the outer circumference of the steering seat 7 or a limit deep circular groove 4 symmetrically arranged in the ring groove 8. It ensures that the steering wheel 6 can drive the steering rod 5 to rotate smoothly in the steering seat 7 and perform sliding limit.

[0015] By moving the handle 1 on the steering wheel 6, the cylindrical pin 3 squeezes the spring 2 to disengage from the limit deep circular groove 4 on the steering seat 7 and slide in the ring groove 8, so that the steering wheel 6 drives the steering rod 5 to rotate in the steering seat 7 until the cylindrical pin 3 slides into another limit deep circular groove 4, and the semi-circular limit baffle 9 on the steering rod 5 is commutated.

[0016] As Figure 2 , Figure 3 shown, the positioning pin 11 is limited by a pin slot 13 formed in the jaw plate frame 10.

[0017] The working process of the present invention is as follows: As Figure 2 , Figure 3 shown, the main clamp of the screwing machine mainly includes a large gear ring 12, a reversing pin 11, a jaw plate frame 10, a slope plate 16, a jaw plate 15, and a tension spring 14. The slope plate 16 and the reversing pin 11 are installed on the large gear ring 12. A pin slot 13 is formed in the jaw plate frame 10, and the tension spring 14 and the jaw plate 15 are installed. The reversing pin 11 is limited by the pin slot 13 formed in the jaw plate frame 10. The positions of the jaw plate 15 and the slope plate 16 are as Figure 3 shown. When making up the joint, while the large gear ring 12 rotates to drive the slope plate 16 to rotate, the jaw plate frame 10 and the jaw plate 15 remain stationary, and the reversing pin 11 slides in the pin slot 13. When the reversing pin 11 abuts against the P position of the pin slot 13, the slope plate 16 forces the jaw plate 15 to climb the slope. Under the action of the tension spring 14, the jaw plate 15 extends out and then rotates together with the jaw plate frame 10 after clamping to realize the function of making up the joint. After making up the joint, the large gear ring 12 rotates reversely, and the jaw plate 15 retracts until the reversing pin 11 abuts against the groove of the semi-circular limit baffle 9 of the handle reversing device, and the jaw plate 15 is completely retracted. Without the limit of the semi-circular limit baffle 9, the jaw plate 15 will overshoot when climbing the slope and will repeatedly climb the slope to make extending and retracting actions, which will affect the service life and there are certain safety hazards. When unscrewing the joint, the handle 1 is moved, and the groove of the semi-circular limit baffle 9 moves to the other side. By the same principle, the large gear ring 12 rotates, the reversing pin 11 slides in the pin slot 13, and abuts against the K position to complete the clamping and unscrewing of the jaw plate 15; after unscrewing the joint, the large gear ring 12 rotates reversely, the reversing pin 11 slides and abuts against the groove of the semi-circular limit baffle 9 again, and the jaw plate 15 is completely retracted. Therefore, the present invention completes the work of making up and unscrewing the main clamp of the screwing machine.

Claims

1. A handle reversing device for a screwing machine, characterized in that: The handle reversing device comprises a steering seat (7) which is mounted on a jaw frame (10); a steering rod (5) is rotatably mounted in the steering seat (7); a semicircular limit baffle (9) is provided at the lower end of the steering rod (5); the semicircular limit baffle (9) is adapted to a reversing pin (11) mounted on a large gear ring (12); the upper end of the steering rod (5) is connected to a steering wheel (6); a handle (1) is mounted on the other end of the steering wheel (6).

2. According to claim 1, a handle reversing device for a screwing machine is characterized in that: A spring (2) and a cylindrical pin (3) are sequentially installed in the steering wheel (6), and the other end of the cylindrical pin (3) is adapted to an annular groove (8) on the outer periphery of the steering seat (7) or a limit depth circular groove (4) symmetrically arranged in the annular groove (8).

3. According to the handle reversing device of the screwing machine as claimed in claim 1, it is characterized in that: The reversing pin (11) is limited by a pin slot (13) opened on the jaw plate frame (10).

4. According to claim 1, the handle reversing device of the screwing machine is characterized in that: By moving the handle (1) on the steering wheel (6), the cylindrical pin (3) squeezes the spring (2) out of the limit deep circular groove (4) on the steering seat (7) and slides on the annular slide groove (8), so that the steering wheel (6) drives the steering rod (5) to rotate in the steering seat (7) until the cylindrical pin (3) slides into another limit deep circular groove (4), completing the reversal of the semicircular limit baffle (9) on the steering rod (5).

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