CN215718552U

CN215718552U - Safety protection tool for jaw plate of casing tongs

Info

Publication number: CN215718552U
Application number: CN202120929370.9U
Authority: CN
Inventors: 张凯; 缪二群
Original assignee: Rudong Qianjin Petroleum Machinery Manufacture Co ltd
Current assignee: Rudong Qianjin Petroleum Machinery Manufacture Co ltd
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2022-02-01
Anticipated expiration: 2031-04-30

Abstract

The utility model discloses a safety protection tool for a jaw plate of a casing tongs, which comprises a casing baffle, a linkage door plate, a fixed base plate, an upper clamping plate and a self-locking mechanism, wherein the upper clamping plate is coaxially connected to the upper end surface of the fixed base plate, the front sides of the upper clamping plate and the fixed base plate are both provided with clamping ports coaxial with the jaw plate of the casing tongs, one side of each of the two clamping ports is rotatably connected with the linkage door plate, the linkage door plate is arranged between the fixed base plate and the upper clamping plate, one end of the linkage door plate extends towards the inner side of the clamping port to form the casing baffle, the self-locking mechanism comprises a guide hook interlocked with the linkage door plate, and the guide hook is arranged on the other side of the clamping port. The utility model solves the problem that the sleeve shakes before being buckled, avoids the damage caused by multiple collisions of the sleeve and the jaw plate of the sleeve clamp, eliminates the potential safety hazard and ensures the safety of operators.

Description

Safety protection tool for jaw plate of casing tongs

Technical Field

The utility model relates to the technical field of oil drilling and well repairing, in particular to a safety protection tool for a jaw plate of a casing tong.

Background

At present, casing tongs are generally used for the make-up and break-out of casings, and can be suitable for casings with different pipe diameters by replacing a jaw plate assembly; however, when the small-diameter casing is used with the casing tongs, the casing is suspended in the jaws of the casing tongs, and the jaws are not clamped, the casing is prone to shaking in the jaws, so that the casing collides with the jaws of the casing tongs, the casing and the jaws of the casing tongs are damaged, and even the operator is accidentally injured.

Chinese patent publication No. CN201747303U discloses a hydraulic power tong safety automatic protection locking and control system, which includes a safety door body, a door spindle passing through the safety door body and rotatably connected to a casing, an arc-shaped baffle and a tension spring arranged at the bottom of the safety door body, one end of the tension spring is fixed on a tension spring spindle at the bottom of the safety door body, and the other end of the tension spring is fixed on a tension spring spindle of the casing. The prior art solves the problem of controlling the operation and the stop of a hydraulic motor by opening and closing the safety door body, and cannot solve the safety protection problem when a sleeve with a small pipe diameter is not clamped in a jaw.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a safety protection tool for a jaw plate of a casing tong, which aims to solve the problems that a casing pipe with a small pipe diameter is hoisted in a jaw and is not clamped, and when the casing pipe shakes in the jaw, the casing pipe easily collides with the jaw plate of the casing tong, so that the casing pipe and the jaw plate of the casing tong are damaged, and even an operator is accidentally injured.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a safety protection tool for a jaw plate of a casing tong comprises a fixed base plate, a linkage door plate, a casing baffle, an upper clamping plate and a self-locking mechanism, wherein the self-locking mechanism comprises a rotary pin shaft, a pushing spring and a guide hook interlocked with the linkage door plate; the upper end face of the fixed backing plate is coaxially connected with an upper clamping plate, the linkage door plate is arranged between the fixed backing plate and the upper clamping plate, the upper end face of the linkage door plate is fixedly provided with a switch handle, the linkage door plate is provided with a rotary door shaft in a penetrating mode, and two ends of the rotary door shaft penetrate through the linkage door plate and are respectively connected with the fixed backing plate and the upper clamping plate.

Wherein, the front sides of the upper clamping plate and the fixed backing plate are both provided with a bayonet coaxial with the jaw of the casing tongs, one side of the bayonet is rotationally connected with a linkage door plate, the guide hook is arranged at the other side of the bayonet, one end of the linkage door plate is provided with a positioning clamping groove matched with the guide hook, the guide hook is arranged on the upper clamping plate, the upper clamping plate is provided with a circular groove for accommodating the pushing spring and a through hole for the hook body to pass through, the middle part of the guide hook is connected with the upper clamping plate through a rotating pin shaft, the tail end of the guide hook is connected with the upper clamping plate through the pushing spring, the front end of the guide hook is provided with a hook body clamped with the positioning clamping groove, the pushing spring generates thrust to the guide hook to realize the automatic clamping of the hook body and the positioning clamping groove, the other end of the linkage door plate extends towards the inner side of the bayonet and is provided with a casing baffle which is integrally formed with the linkage door plate, when the sleeve baffle is impacted, the whole linkage door plate is driven to rotate and close; the bayonet socket of fixed backing plate is the arc bayonet socket, the bayonet socket of going up the cardboard is U type bayonet socket, the sleeve pipe baffle is the arc structure, linkage door plant and sleeve pipe baffle are formed with arc curved surface inner wall, linkage door plant, sleeve pipe baffle, go up cardboard and fixed backing plate enclose jointly and become the protection inner chamber.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the tool, after a sleeve enters the jaw of the casing tongs, the linked door plate is driven to rotate and close by the impact of the sleeve baffle, and the positioning clamping groove is automatically clamped by the guide hook pushed by the pushing spring, so that the linked door plate is finally self-locked, the problem that the sleeve shakes before being buckled is solved, the damage caused by multiple collisions of the sleeve and the jaw of the casing tongs is avoided, the potential safety hazard is eliminated, and the safety of operators is ensured;

2. the self-locking mechanism is flexible in design and good in stability, and through the arrangement of the guide hook, the pushing spring is used for generating thrust on the guide hook, so that automatic interlocking of the guide hook and the linkage door plate is realized, the linkage door plate can be unlocked only by manual intervention, and the guide hook is withdrawn from the positioning clamping groove of the linkage door plate.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a cross-sectional view taken along section A-A of the present invention;

in the figure: 1. the device comprises a fixed base plate, 2, an upper clamping plate, 3, a linkage door plate, 4, a sleeve baffle, 5, a guide hook, 6, a rotary pin shaft, 7, a circular groove, 8, a hook body, 9, a positioning clamping groove, 10, a switch handle, 11, a rotary door shaft, 12, a pushing spring, 13, a through hole, 14, a bayonet, 15 and an arc-shaped curved inner wall.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Referring to fig. 1-2, a safety protection tool for a jaw plate of a casing tongs is shown, which comprises a fixed base plate 1 (the shape of the fixed base plate 1 is the same as that of an upper jaw plate frame of a universal casing tongs), an upper clamping plate 2 is coaxially connected to the upper end surface of the fixed base plate 1 through a plurality of screws, and bayonets 14 coaxial with jaws of the casing tongs are arranged on the front sides of the fixed base plate 1 and the upper clamping plate 2 (the two bayonets 14 are coaxially overlapped up and down and have the same opening direction, the bayonets of the fixed base plate 1 are of an arc structure, and the bayonets of the upper clamping plate 2 are of a U-shaped structure); the right side of the bayonet 14 is provided with a linkage door panel 3, the upper end surface of the linkage door panel 3 is fixedly provided with a switch handle 10, the linkage door panel 3 is also provided with a rotary door shaft 11 in a penetrating way, and the rotary door shaft 11 is used for rotatably connecting the linkage door panel 3 between the fixed base plate 1 and the upper clamping plate 2; a guide hook 5 interlocked with the linkage door plate 3, a rotating pin shaft 6 and a pushing spring 12 are correspondingly installed on the left side of the bayonet 14, the guide hook 5 is movably installed on the upper clamping plate 2, a through hole 13 and a circular groove 7 are formed in the upper clamping plate 2, a positioning clamping groove 9 is formed in one end, close to the left side of the bayonet 14, of the linkage door plate 3, a hook body 8 which penetrates through the through hole 13 and is clamped with the positioning clamping groove 9 is formed in the front end of the guide hook 5, the tail end of the guide hook 5 is connected with the upper clamping plate 2 through the pushing spring 12 in the circular groove 7, the middle of the guide hook 5 is connected with the upper clamping plate 2 through the rotating pin shaft 6, a sleeve baffle 4 with an arc-shaped structure is integrally formed at the other end of the linkage door plate 3, and the sleeve baffle 4 form an arc-shaped curved inner wall 15 together; after linkage door plant 3 closed, linkage door plant 3, sleeve pipe baffle 4, go up cardboard 2 and fixed backing plate 1 can form the protection inner chamber, avoid the sleeve pipe to rock before the knot.

The working principle is as follows: firstly, a fixed base plate 1 is coaxially arranged on an upper jaw plate frame of a casing tongs with matched specification through a plurality of screws, and the tool is assembled; then, when the sleeve is hung in the jaw of the sleeve clamp, the sleeve baffle 4 above the jaw is contacted with the pushed sleeve, so that the sleeve baffle 4 is impacted, and the linkage door plate 3 is driven to rotate and close towards the direction of the guide hook 5; finally, under the synchronous action of the pushing spring 12, the guide hook 5 is clamped into the positioning clamping groove 9 of the linkage door plate 3, so that the self-locking of the linkage door plate 3 is realized, the sleeve before being buckled is clamped, the sleeve is finally prevented from shaking, and the safety protection effect is achieved.

Claims

1. The utility model provides a casing tongs jaw safety protection frock, includes sleeve pipe baffle, linkage door plant and self-locking mechanism, its characterized in that still includes fixed backing plate and last cardboard, go up cardboard coaxial coupling at the up end of fixed backing plate, go up the bayonet socket coaxial with the keeping silent of casing tongs, two all seted up to the front side of cardboard and fixed backing plate one side rotation type of bayonet socket is connected with the linkage door plant, the linkage door plant sets up between fixed backing plate and last cardboard, the one end of linkage door plant has the sleeve pipe baffle to the inboard extension of bayonet socket, self-locking mechanism includes the gib block with linkage door plant interlocking, the gib block sets up the opposite side at the bayonet socket.

2. The casing tong jaw safety protection tool according to claim 1, wherein the casing baffle is of an arc structure, the casing baffle and the linkage door plate are integrally formed, and a positioning clamping groove matched with the guide hook is formed in the other end of the linkage door plate.

3. The casing tongs jaw safety protection tool according to claim 2, characterized in that the self-locking mechanism further comprises a rotary pin shaft and a pushing spring, the guide hook is arranged on the upper clamping plate, the tail end of the guide hook is connected with the upper clamping plate through the pushing spring, the middle of the guide hook is connected with the upper clamping plate through the rotary pin shaft, and a hook body clamped with the positioning clamping groove is formed at the front end of the guide hook.

4. The safety protection tool for the jaw plate of the casing tongs as claimed in claim 3, wherein the upper clamping plate is provided with a circular groove for accommodating the pushing spring and a through hole for the hook body to pass through.

5. The safety protection tool for the jaw plates of the casing tongs as claimed in claim 1, wherein a rotary door shaft penetrates through the linkage door plate, and two ends of the rotary door shaft penetrate through the linkage door plate and are respectively connected with the fixed backing plate and the upper clamping plate.

6. The safety protection tool for the jaw plate of the casing tongs as claimed in claim 2, wherein the bayonet of the fixed base plate is an arc-shaped bayonet, and the bayonet of the upper clamping plate is a U-shaped bayonet.

7. The casing tong jaw safety protection tool according to claim 6, wherein the linkage door plate and the casing baffle plate form an arc-shaped curved inner wall, and the linkage door plate, the casing baffle plate, the upper clamping plate and the fixed base plate jointly enclose a protection inner cavity.

8. The safety protection tool for the jaw plate of the casing tongs as claimed in claim 1, wherein a switch handle is fixed on the upper end face of the linkage door plate.