Preassembling clamp

Abstract

The utility model relates to the technical field of preassembling clamps, and discloses a preassembling clamp which comprises a preassembling body and a nut used for installing a clamping sleeve. The preassembled body comprises a fixing rod, one end of the fixing rod is integrally connected with a connecting end, and the surface of the connecting end is connected with the inner wall of the nut. According to the preassembling clamp, the preassembling body, the connecting end, the shoulder blocking groove, the circular truncated cone closing groove, the clamping sleeve and the nut are arranged, the nut and the clamping sleeve are sequentially connected to a steel pipe in a sleeving mode, the cutting edge ring part of the clamping sleeve is located on the side close to the preassembling body, the pipe end is in butt joint with the interior of the shoulder blocking groove, the nut is rotated to be in butt joint with the preassembling body, and when the nut is rotated till the tightening torque is obviously increased, namely, a force application point, the nut is tightened; the circular truncated cone closing groove extrudes the cutting edge ring part to grasp the steel pipe, a wrench is used for clamping the nut, the nut is driven to continuously rotate by one circle, the circular truncated cone closing groove extrudes the cutting edge ring part of the cutting sleeve in the rotating process, the cutting edge ring part is cut into the steel pipe, the cut-in cutting sleeve cannot move in the axial direction of the steel pipe, and the cutting sleeve is prevented from being separated from the steel pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of pre-installed fixtures, in particular to a pre-installed fixture. Background Art

[0002] EO connectors generally refer to ferrule-type pipe connectors, which are sealed pipe connectors suitable for non-corrosive or corrosive media such as oil, water, and gas. After being connected to the pipeline, they have the characteristics of reliable connection and good sealing performance. Therefore, they are widely used in oil refining, chemical industry, light industry, textile, national defense, metallurgy, aviation, shipbuilding and other systems; they are also suitable for hydraulic transmission pipelines in various mechanical engineering, machine tool equipment, etc.

[0003] When the progressive ferrule fitting is used with a stainless steel pipe or a ferrule combination fitting, or a ferrule pipe fitting is used with a steel pipe with a diameter of more than 30 mm, it is difficult for the ferrule to cut into the surface of the steel pipe, resulting in the separation of the ferrule from the steel pipe. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a pre-installed fixture to solve the problems mentioned in the above background.

[0005] The utility model provides the following technical solutions: a pre-installed fixture, comprising: a pre-installed body and a nut for installing a ferrule;

[0006] The preassembled body comprises a fixing rod, one end of which is integrally formed and connected with a connecting end head, the surface of which is connected to the inner wall of the nut, and the interior of the connecting end head is provided with a shoulder groove and a truncated cone joint groove, and the shoulder groove is connected with the truncated cone joint groove;

[0007] The ferrule comprises a mounting tube, one end of which is integrally formed with a cutting edge ring portion, and the inner wall of the truncated cone joint groove is connected to the surface of the cutting edge ring portion.

[0008] Preferably, a deformation groove is provided on the inner wall of the mounting tube at a position corresponding to the cutting edge ring portion.

[0009] Preferably, a reinforcement portion is integrally formed and connected to the mounting tube.

[0010] Preferably, the included angle of the truncated cone joint groove is 24°.

[0011] Preferably, clamping grooves are symmetrically provided on the surface of the preassembled body.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The pre-installed fixture is provided with a pre-installed body, a connecting end, a shoulder groove, a truncated cone groove, a ferrule and a nut, and the nut and the ferrule are sequentially sleeved on the steel pipe, the cutting edge ring of the ferrule is located on the side close to the pre-installed body, the pipe end is docked into the shoulder groove, the nut is rotated to dock with the pre-installed body, and the nut is rotated until the tightening torque is significantly increased, that is, when the force is applied, the truncated cone groove squeezes the cutting edge ring to grasp the steel pipe, the nut is clamped with a wrench, and the nut is driven to continue to rotate one circle, during the rotation process, the truncated cone groove squeezes the cutting edge ring of the ferrule, and the cutting edge ring cuts into the steel pipe, and the ferrule that has completed the cutting cannot move in the axial direction of the steel pipe, so as to avoid the ferrule and the steel pipe from being separated. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0015] Figure 2 For this utility model Figure 1 Schematic diagram of the side section structure at the middle AA position;

[0016] Figure 3 This is a schematic diagram of the side section structure of the preassembled body of the utility model;

[0017] Figure 4 This is a schematic diagram of the side section structure of the ferrule of the utility model;

[0018] Figure 5 It is a schematic diagram of the side section structure of the nut of the utility model.

[0019] In the figure: 1, preassembled body; 101, fixing rod; 102, connecting end; 2, ferrule; 201, mounting tube; 202, cutting edge ring; 3, nut; 4, shoulder groove; 5, frustum groove; 6, deformation groove; 7, reinforcement part; 8, clamping groove. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-5 , a pre-installation fixture, comprising: a pre-installed body 1 and a nut 3 for installing a ferrule 2;

[0022] See also Figure 3The preassembled body 1 includes a fixing rod 101, one end of which is integrally connected with a connecting end 102, the surface of the connecting end 102 is connected to the inner wall of the nut 3, and the interior of the connecting end 102 is provided with a shoulder groove 4 and a truncated cone joint groove 5, the shoulder groove 4 is connected to the truncated cone joint groove 5, and the angle of the truncated cone joint groove 5 is 24°;

[0023] See also Figure 4 The ferrule 2 includes a mounting tube 201, one end of which is integrally connected with a cutting edge ring portion 202, the inner wall of the truncated cone joint groove 5 is connected to the surface of the cutting edge ring portion 202, a deformation groove 6 is opened on the inner wall of the mounting tube 201 corresponding to the position of the cutting edge ring portion 202, and a reinforcement portion 7 is integrally connected to the mounting tube 201. The mounting tube 201 is sleeved to the surface of the steel pipe, and the reinforcement portion 7 of the mounting tube 201 is connected to the inner wall of the nut 3. The reinforcement portion 7 can prevent the end of the mounting tube 201 from being squeezed and deformed.

[0024] Clamping grooves 8 are symmetrically provided on the surface of the preassembled body 1 , so as to facilitate fixing the preassembled body 1 with a bench vice.

[0025] Use a bench vise to fix the preassembled body 1. Remove the burrs inside and outside the end of the steel pipe before installation and clean it. Use hydraulic mineral oil HLP32 to lubricate the conical groove 5 of the preassembled body 1. Put the nut 3 and the ferrule 2 on the steel pipe in turn. The cutting edge ring 202 of the ferrule 2 is located on the side close to the preassembled body 1. Pass the pipe end through the conical groove 5 and connect it to the shoulder groove 4. The cutting edge ring 202 of the ferrule 2 is connected to the conical groove 5. Turn the nut 3 to thread it with the connecting end 102 of the preassembled body 1. Turn the nut 3 until the tightening torque increases significantly, that is, when the force is applied, the conical groove 5 Squeeze the cutting edge ring 202 to grab the steel pipe, use a wrench to clamp the nut 3, and drive the nut 3 to continue to rotate one circle. During the rotation, the truncated cone groove 5 squeezes the cutting edge ring 202 of the ferrule 2, and the cutting edge ring 202 cuts into the steel pipe. After installation, completely loosen the nut 3. In front of the cutting edge of the ferrule 2, there must be an obvious bulge of the steel pipe material. At this position, the ferrule 2 can rotate on the steel pipe, but cannot be detached from the axial direction of the steel pipe. The ferrule 2 that has been cut in cannot move in the axial direction of the steel pipe to avoid separation of the ferrule 2 and the steel pipe. The pre-installed ferrule 2 steel pipe can be docked with the joint body.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] 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 pre-installed fixture, characterized in that: include: A preassembled body (1) and a nut (3) for mounting a ferrule (2); The preassembled body (1) comprises a fixing rod (101), one end of the fixing rod (101) is integrally connected with a connecting end head (102), the surface of the connecting end head (102) is connected to the inner wall of the nut (3), the interior of the connecting end head (102) is provided with a shoulder groove (4) and a truncated cone joint groove (5), and the shoulder groove (4) is connected to the truncated cone joint groove (5); The ferrule (2) comprises a mounting tube (201), one end of which is integrally formed with a cutting edge ring portion (202), and the inner wall of the truncated cone joint groove (5) is connected to the surface of the cutting edge ring portion (202).

2. A pre-installed fixture according to claim 1, characterized in that: A deformation groove (6) is provided on the inner wall of the mounting tube (201) at a position corresponding to the cutting edge ring portion (202).

3. A pre-installed fixture according to claim 1, characterized in that: The mounting tube (201) is integrally formed with a reinforcement portion (7).

4. A pre-installed fixture according to claim 1, characterized in that: The included angle of the truncated cone joint groove (5) is 24°.

5. A pre-installed fixture according to claim 1, characterized in that: Clamping grooves (8) are symmetrically provided on the surface of the preassembled body (1).

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