CN217256053U

CN217256053U - Flange mouth gag

Info

Publication number: CN217256053U
Application number: CN202123368251.XU
Authority: CN
Inventors: 李超; 邱修见; 孟乾
Original assignee: Luoyang Xinao Energy Development Co ltd
Current assignee: Luoyang Xinao Energy Development Co ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-08-23
Anticipated expiration: 2031-12-30

Abstract

A flange mouth gag relates to the technical field of pipeline installation tools, which comprises a pin rod, two inner pull rods, two outer pull rods and two connecting plates; external threads are arranged at two ends of the pin rod; lantern rings are arranged at one ends of the two inner pull rods and the two outer pull rods, external threads are arranged on the rod bodies at the other ends of the two inner pull rods and the two outer pull rods, and the rod body in the middle of each outer pull rod is bent into a semi-circular arc shape; two waist-shaped holes are symmetrically formed in two ends of the plate surfaces of the two connecting plates, the two waist-shaped holes of one connecting plate are respectively matched with the external thread end parts of the two inner pull rods to penetrate through, and the two waist-shaped holes of the other connecting plate are respectively matched with the external thread end parts of the two outer pull rods to penetrate through; the centers of the plate surfaces of the two connecting plates are respectively provided with a screw hole for top screwing, a threaded mandril penetrates through the screw hole for top screwing, the outer end of the threaded mandril is fixedly connected with a screw head, and the inner end of the threaded mandril is rotatably connected with a wedge-shaped mandril; the flange mouth gag improves the efficiency and the effect of the opening of the pipeline flange and can increase the applicability.

Description

Flange mouth gag

Technical Field

The utility model belongs to the technical field of the pipeline installation instrument technique and specifically relates to a flange mouth gag is related to.

Background

When the pipeline flange joint leaks, the flange gasket needs to be replaced, but the pipeline is affected by factors such as extrusion, site conditions and the like, so that the flange gasket replacement is very difficult; according to the traditional method, the flange is opened by prying with a crowbar, and after the flange is opened, a flange sheet is easy to deform and dislocate, so that a fixing bolt cannot return, time and labor are wasted, and the working efficiency is influenced; chinese utility model patent with publication number CN203495888U discloses an oil gas pipeline connecting flange mouth gag erects the screw rod in the top of pipe flange through two flanges and a pin rod, then backs up the pipe flange through revolving the conical head screw rod of twisting the screw on the screw rod, but this kind of flange mouth gag has following three shortcoming: first, it cannot be adapted to pipe flanges of different diameters and thicknesses; secondly, the pipeline flange is opened only from one direction, and the gasket is extruded and damaged due to uneven stress of the flange; thirdly, when the conical head screw rod is screwed, the bolt connecting holes of the pipeline flanges can be abutted against the pin rods to bear force, so that the friction force of the two pipeline flanges is increased.

Disclosure of Invention

In order to overcome not enough among the background art, the utility model discloses a flange mouth gag has improved pipeline flange open-ended efficiency and effect to can increase the suitability.

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

a flange mouth gag comprises a pin rod, two inner pull rods, two outer pull rods and two connecting plates; the rod diameter of the pin rod can be matched with and penetrate through a bolt connecting hole of the flange to be opened, and external threads matched with a limiting nut in a screwing mode are arranged at two ends of the pin rod; one ends of the two inner pull rods and the two outer pull rods are respectively provided with a lantern ring which is sleeved on the pin rod body in a clearance manner, the other end rod bodies of the two inner pull rods and the two outer pull rods are respectively provided with an external thread which is screwed and matched with the two positioning nuts, and the middle rod body of each outer pull rod is bent into a semi-arc shape which bypasses the flange connecting pipe; two waist-shaped holes along the length direction of the connecting plates are symmetrically formed in two ends of the plate surfaces of the two connecting plates, the two waist-shaped holes of one connecting plate are respectively matched with the external thread end parts of the two inner pull rods to penetrate through the connecting plates for positioning, and the two waist-shaped holes of the other connecting plate are respectively matched with the external thread end parts of the two outer pull rods to penetrate through the connecting plates for positioning; the center of the plate surfaces of the two connecting plates is provided with a screw hole for screwing, a threaded ejector rod is arranged in the screw hole for screwing in a matching mode, the outer end of the threaded ejector rod is fixedly connected with a screwing head, and the inner end of the threaded ejector rod is rotatably connected with a wedge-shaped ejector head corresponding to the gap between the two flanges.

Furthermore, the bending directions of the semi-circular arc rod bodies of the two outer pull rods are opposite.

Further, the screwing head is a hexagonal prism.

Furthermore, the axial middle part of the screwing head is provided with a through hole.

Furthermore, the center of the plate surface of the connecting plate protrudes to form a reinforcing block.

Due to the adoption of the technical scheme, the utility model discloses following beneficial effect has:

the utility model discloses a flange mouth gag, through lantern ring slide adjustment on the pin rod to and inner pull rod and outer pull rod along waist type hole adjustment, adapt to the pipeline flange of different thickness, through connecting plate along corresponding inner pull rod or outer pull rod axial adjustment, adapt to the pipeline flange of different diameters; through the two inner pull rods and the two outer pull rods, the two thread ejector rods can be correspondingly distributed, so that the pipeline flange can be uniformly opened, and the flange gasket is prevented from being extruded and damaged in the dismounting process; in addition, in the process of screwing the threaded ejector rod, the inner pull rod and the outer pull rod can simultaneously apply pulling force to the pin rod in opposite directions, the interference force of the pin rod on the bolt connecting hole of the pipeline flange can be weakened or even eliminated, and then the friction force between the pin rod and the pipeline flange can be reduced, so that the two pipeline flanges are easier to separate; to sum up, for prior art, the utility model discloses improved flange open-ended efficiency greatly, the time of having practiced thrift, reduced the manual work, reduced the damage risk of flange gasket installation, increased the suitability of instrument.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention;

fig. 2 is a schematic structural view of the outer draw bar.

In the figure: 1. a through hole; 2. screwing the head; 3. positioning a nut; 4. a threaded ejector rod; 5. a connecting plate; 6. a kidney-shaped hole; 7. a limit nut; 8. an inner pull rod; 9. a collar; 10. a pin rod; 11. an outer pull rod; 12. a wedge-shaped top head.

Detailed Description

In the following description, the technical solutions of the present invention will be described with reference to the drawings in the embodiments of the present invention, it should be understood that, if there are the indicated directions or positional relationships, such as the terms "upper", "lower", "front", "rear", "left", "right", etc., it only corresponds to the drawings of the present invention, and in order to facilitate the description of the present invention, it is not necessary to indicate or imply that the indicated device or element must have a specific direction:

the flange mouth gag described with reference to fig. 1-2 comprises a pin rod 10, two inner pull rods 8, two outer pull rods 11 and two connecting plates 5; the rod diameter of the pin rod 10 can be matched with and penetrate through a bolt connecting hole of the flange to be opened, external threads screwed and matched with the limiting nut 7 are arranged at two ends of the pin rod 10, and the two inner pull rods 8 and the two outer pull rods 11 are prevented from slipping through limiting of the limiting nut 7;

one ends of the two inner pull rods 8 and the two outer pull rods 11 are respectively provided with a lantern ring 9 which is sleeved on the pin rod 10 body in a clearance mode, and the lantern rings 9 can axially slide along the pin rod 10 to adjust the positions of the two inner pull rods 8 and the two outer pull rods 11; the other end rod bodies of the two inner pull rods 8 and the two outer pull rods 11 are respectively provided with an external thread which is screwed and matched with the two positioning nuts 3, and after the connecting plate 5 is adjusted in place along the axial direction of the corresponding inner pull rod 8 or the corresponding outer pull rod 11, the two positioning nuts 3 positioned on the two sides of the connecting plate 5 can be screwed, so that the connecting plate 5 and the corresponding inner pull rod 8 or the corresponding outer pull rod 11 are stably connected; the middle rod body of the outer pull rod 11 is bent into a semi-circular arc shape which bypasses the flange connecting pipe, so that the two threaded ejector rods 4 can be correspondingly arranged, and the outer pull rod 11 has certain rigidity and strength and is prevented from deforming in the opening process; according to the requirement, the bending directions of the semi-circular arc rod bodies of the two outer pull rods 11 are opposite, so that the balance is ensured, and the two outer pull rods 11 are prevented from rotating in the same direction; two waist-shaped holes 6 along the length direction of the connecting plates are symmetrically formed in two ends of the plate surfaces of the two connecting plates 5, the two waist-shaped holes 6 of one connecting plate 5 are respectively matched with the external thread end parts of the two inner pull rods 8 to penetrate through the positioning, the two waist-shaped holes 6 of the other connecting plate 5 are respectively matched with the external thread end parts of the two outer pull rods 11 to penetrate through the positioning, and the connecting plates 5 are axially adjusted along the corresponding inner pull rods 8 or outer pull rods 11 to adapt to pipeline flanges with different diameters;

the centers of the plate surfaces of the two connecting plates 5 are respectively provided with a screw hole for top screwing, a threaded mandril 4 is arranged in the screw hole for top screwing in a matching way, the outer end of the threaded mandril 4 is fixedly connected with a screw head 2, the inner end of the threaded mandril 4 is rotatably connected with a wedge-shaped top head 12 corresponding to the gap between the two flanges, the wedge-shaped top head 12 is abutted between the gaps of the two pipeline flanges, and the wedge-shaped top head 12 is moved by rotating the threaded mandril 4 so as to jack the two pipeline flanges; according to the requirement, the screwing head 2 is a hexagonal prism, so that the screwing is convenient for a hand to screw, and in addition, the axial middle part of the screwing head 2 is provided with the through hole 1, so that a tool can be conveniently inserted into the through hole 1 for screwing; in addition, the center of the plate surface of the connecting plate 5 is raised to form a reinforcing block, so that the connecting plate 5 is prevented from deforming during use.

The flange mouth gag of the utility model is implemented by firstly detaching the connecting bolt of the pipeline flange, then penetrating the pin rod 10 into the bolt connecting hole of the pipeline flange, and then sequentially sleeving the lantern ring 9 of the inner pull rod 8, the lantern ring 9 of the outer pull rod 11 and the limiting nut 7 at the two ends of the pin rod 10; then, the two inner pull rods 8 and the two outer pull rods 11 respectively penetrate into the corresponding kidney-shaped holes 6 of the two connecting plates 5 and are fastened through the positioning nuts 3; the outer pull rod 11 is rotated to enable the two thread ejector rods 4 to correspond to each other, then the thread ejector rods 4 are screwed, the two wedge-shaped ejector heads 12 enter a gap between the two pipeline flanges, and the pipeline flanges can be opened.

The details of the present invention not described in detail are prior art, and it will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the scope of the claims.

Claims

1. A flange mouth gag, characterized by: comprises a pin rod (10), two inner pull rods (8), two outer pull rods (11) and two connecting plates (5); the rod diameter of the pin rod (10) can be matched with a bolt connecting hole of a flange to be opened, and external threads for screwing and matching the limiting nut (7) are arranged at two ends of the pin rod (10); one ends of the two inner pull rods (8) and the two outer pull rods (11) are respectively provided with a lantern ring (9) which is sleeved on the rod body of the pin rod (10) in a clearance mode, the other end rod bodies of the two inner pull rods (8) and the two outer pull rods (11) are respectively provided with an external thread which is matched with the two positioning nuts (3) in a screwing mode, and the middle rod body of each outer pull rod (11) is bent to be in a semi-arc shape bypassing the flange connecting pipe; two waist-shaped holes (6) along the length direction of the connecting plates are symmetrically formed in two ends of the plate surfaces of the two connecting plates (5), the two waist-shaped holes (6) of one connecting plate (5) are respectively matched with the external thread end parts of the two inner pull rods (8) to penetrate through the connecting plates for positioning, and the two waist-shaped holes (6) of the other connecting plate (5) are respectively matched with the external thread end parts of the two outer pull rods (11) to penetrate through the connecting plates for positioning; the face central authorities of two connecting plates (5) all are equipped with the screw of revolving one's head, screw ejector pin (4) are worn to be equipped with in the screw of revolving one's head in the cooperation, the outer end fixed connection of screw ejector pin (4) has the head of screwing soon (2), the inner rotation of screw ejector pin (4) is connected with wedge top (12) that correspond two flange clearances.

2. The flange mouth gag of claim 1, characterized by: the bending directions of the semi-circular arc-shaped rods of the two outer pull rods (11) are opposite.

3. The flange mouth gag of claim 1, characterized by: the screwing head (2) is a hexagonal prism.

4. The flange mouth gag of claim 1, characterized by: the axial middle part of the screwing head (2) is provided with a through hole (1).

5. The flange mouth gag of claim 1, characterized by: the center of the plate surface of the connecting plate (5) is protruded to form a reinforcing block.