CN211453172U

CN211453172U - Sealing clamp for hydrostatic test of plastic pipe

Info

Publication number: CN211453172U
Application number: CN201921706929.0U
Authority: CN
Inventors: 解理洁; 孙高远; 迟恩南; 林健; 王海; 裴晓静
Original assignee: China Petroleum and Chemical Corp; Qilu Petrochemical Co of Sinopec
Current assignee: China Petroleum and Chemical Corp; Qilu Petrochemical Co of Sinopec
Priority date: 2019-10-12
Filing date: 2019-10-12
Publication date: 2020-09-08
Anticipated expiration: 2029-10-12

Abstract

A sealing clamp for a plastic pipe hydrostatic test belongs to the technical field of plastic pipe detection. The method is characterized in that: including connecting (1), clamp ring and locking device, clamp ring one end and joint (1) sealing connection, the clamp ring is for following the round platform form that the direction external diameter of keeping away from joint (1) reduces gradually, and the clamp ring is formed by two piece at least curved pressure strip (4) concatenations, is provided with the portion that compresses tightly on the locking device, and locking device is connected with joint (1) detachable to compress tightly the clamp ring. This quiet hydraulic pressure of plastics tubular product is experimental with seal anchor clamps 'clamp's clamp ring is formed by two piece at least pressure strips concatenations to can adapt to compressing tightly of the different plastic tubing of diameter, can enough avoid causing the damage to the plastic tubing, can avoid again to seal not tight problem to appear, moreover because the clamp ring concatenation forms, make clamp ring easy dismounting, the clamp ring can use repeatedly many times, has solved original take the whole pipe box of tapering, for the disposable condition of use, has practiced thrift the cost.

Description

Sealing clamp for hydrostatic test of plastic pipe

Technical Field

A sealing clamp for a plastic pipe hydrostatic test belongs to the technical field of plastic pipe detection.

Background

Hydrostatic strength is one of the important properties of pipes, and is an important index for ensuring the use safety of products. The service life of the plastic pipe depends on the thermal oxidation aging resistance of the pipe and the creep deformation characteristic under the action of long-term static pressure, and the pressure-resistant time and the maximum pressure value of instantaneous damage of the pipe under long-term constant internal pressure and constant temperature are detection items of pipe manufacturers and detection mechanisms. The pressure test refers to that a given section of plastic pipe sample is subjected to a specified constant internal pressure in a given time, and whether the sample is damaged or not is observed. The sealing joints are arranged at two ends of the sample, so that the sealing joints are connected with the sample and the pressure device, and the sample cannot bear axial acting force or damage the sample. At present, a sealing joint is used, a pipe sample is inserted and sleeved on a plug, a pipe hoop with taper is sleeved outside the pipe sample, then a nut is sleeved on the pipe hoop and screwed with threads of the plug joint, and test pressure is applied to the pipe sample from the other end of the pipe hoop.

The existing situation is that: the pipe fitting test sample is externally sleeved with a taper pipe sleeve to form an integral fixed-size metal pipe hoop, and as the diameter of a test sample pipe can fluctuate within a standard allowable tolerance range, if the pipe diameter is larger within the standard allowable tolerance range, the pipe fitting test sample can deform during installation, so that the installation is difficult; if the pipe diameter is on the small side in the range size that the tolerance allows, when pressurizeing for pipe fitting inside in the experiment, the not good condition of sealed effect can appear, influences normal experiment and goes on. In addition, the metal pipe hoop for the test is disposable and cannot be used repeatedly, so that certain waste is caused.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: the sealing clamp overcomes the defects of the prior art, can adapt to the compression of the plastic pipe with the pipe diameter floating in the standard tolerance, and avoids damaging the plastic pipe or sealing the plastic pipe with poor sealing performance for the hydrostatic test.

The utility model provides a technical scheme that its technical problem adopted is: this static hydraulic pressure of plastics tubular product is sealing jig for test, its characterized in that: including joint, clamp ring and locking device, clamp ring one end and joint sealing connection, the round platform form that the clamp ring reduces for the direction external diameter along keeping away from the joint gradually, and the clamp ring is formed by two piece at least curved pressure strips concatenation, is provided with the portion that compresses tightly on the locking device, and locking device is connected with joint detachable to compress tightly the clamp ring.

Preferably, the locking device is a sleeve or a nut, and the locking sleeve or the nut is in threaded connection with the joint.

Preferably, the pressing part is a cone with a diameter gradually decreasing in a direction away from the joint.

Preferably, the inner diameter of one end of the joint is larger than that of the other end of the joint to form a limiting part, the outer diameter of one end, close to the joint, of the compression ring is smaller than that of the middle part of the compression ring to form a butt joint part, and the butt joint part extends into the limiting part and is in sealing connection with the limiting part.

Preferably, a sealing ring is arranged in the limiting part, and the butt joint part extends into the limiting part and compresses the sealing ring.

Preferably, threads are arranged around the inner wall of the compression ring to form a sealing part.

Preferably, the sealing part is arranged at one end of the compression ring far away from the joint.

Preferably, the taper of the pressing plate is 1: 33.

Preferably, the outer diameter adjusting range of one end, close to the joint, of the compression ring is 24-26 mm, and the outer diameter adjusting range of one end, far away from the joint, of the compression ring is 24-25 mm.

Compared with the prior art, the utility model discloses the beneficial effect who has is:

1. this quiet hydraulic pressure of plastics tubular product is experimental with seal anchor clamps 'clamp's clamp ring is formed by two piece at least pressure strips concatenations to can adapt to compressing tightly of the different plastic tubing of diameter, can enough avoid causing the damage to the plastic tubing, can avoid again to seal not tight problem to appear, moreover because the clamp ring concatenation forms, make clamp ring easy dismounting, the clamp ring can use repeatedly many times, has solved original take the whole pipe box of tapering, for the disposable condition of use, has practiced thrift the cost.

2. The locking sleeve or the nut is in threaded connection with the joint, so that the installation is convenient and fast, and the working efficiency is improved.

3. The compressing part is conical, so that the compressing part can be matched with the compressing ring, the compressing of the compressing ring is more reliable, and the sealing effect between the plastic pipe and the sealing clamp is ensured.

4. The limiting part facilitates the installation and the limiting of the plastic pipe, and can be matched with the butt joint part to realize sealing, and the butt joint part compresses the sealing ring, so that the reliable sealing between the compression ring and the joint is ensured.

5. The clamp ring inner wall is provided with the screw thread, forms the sealing, and when locking device locked the clamp ring, the effort made the even bite into tubular product sample surface of internal thread of clamp ring, promptly bites into the plastic tubing surface, can form effectual sealed and fixed, ensures normally to test.

6. The outer diameter regulating range of the end, close to the joint, of the compression ring is 24-26 mm, the regulating range of the outer diameter of the end, far away from the joint, of the compression ring is 24-25 mm, and therefore the plastic pipe sample can be tested normally within a tolerance range.

Drawings

FIG. 1 is a schematic cross-sectional front view of a sealing clamp for hydrostatic testing of plastic tubing mated with a plastic tube.

Fig. 2 is a partially enlarged view of a portion a in fig. 1.

Fig. 3 is a perspective view of the compacting plate.

In the figure: 1. joint 101, spacing portion 2, plastic tubing 3, nut 4, pressure strip 401, butt joint portion 402, sealing 5, sealing washer 6, discharge valve.

Detailed Description

Fig. 1 to 3 are preferred embodiments of the present invention, and the present invention will be further explained with reference to fig. 1 to 3.

The utility model provides a static hydraulic test of plastics tubular product is with sealing jig, includes and connects 1, clamp ring and locking device, clamp ring one end and joint 1 sealing connection, and the clamp ring is for following the round platform form that the direction external diameter that keeps away from and connect 1 reduces gradually, and the clamp ring is formed by 4 concatenations of two piece at least curved pressure strips, is provided with the portion of compressing tightly on the locking device, and locking device is connected with joint 1 detachable to compress tightly the clamp ring. This quiet hydraulic pressure of plastics tubular product is experimental with seal anchor clamps 'clamp's clamp ring is formed by two piece at least pressure strips 4 concatenations to can adapt to compressing tightly of the different plastic tubing 2 of diameter, can enough avoid causing the damage to plastic tubing 2, can avoid sealed not tight problem to appear again, moreover because the clamp ring concatenation forms, make clamp ring easy dismounting, the clamp ring can use repeatedly many times, has solved the whole pipe box of original area tapering, for the disposable condition of use, has practiced thrift the cost.

The present invention is further described with reference to specific embodiments, however, it will be understood by those skilled in the art that the detailed description given herein with respect to the drawings is for better explanation and that the present invention is necessarily to be construed as limited to those embodiments, and equivalents or common means thereof will not be described in detail but will fall within the scope of the present application.

Specifically, the method comprises the following steps: as shown in FIGS. 1 to 3: and two ends of each plastic pipe 2 as a sample are respectively provided with a sealing clamp, any one of the sealing clamps is provided with an exhaust valve 6, and the other sealing clamp is connected with a pressure device in a sealing manner, so that the plastic pipe 2 is detected.

The joint 1 is cylindrical, the inner diameter of one end of the joint 1 is smaller than that of the other end of the joint to form a limiting part 101, the inner diameter of the plastic pipe 2 is equal to that of the joint 1, and the outer diameter of the plastic pipe 2 is smaller than that of the limiting part 101. The end part of the plastic pipe 2 extends into the limiting part 101 at the corresponding side, and the plastic pipe 2 and the joint 1 are coaxially arranged.

A sealing ring 5 is arranged in the limiting part 101, and the sealing ring 5 is sleeved at the end part of the plastic pipe 2. The outer diameter of one end of the compression ring close to the joint 1 on the corresponding side is equal to the outer diameter of the joint 1, one end of the compression ring close to the joint 1 on the corresponding side is provided with a butt joint part 401, the butt joint part 401 is arranged around the compression ring, the inner diameter of the butt joint part 401 is slightly larger than the outer diameter of the plastic pipe 2, and the outer diameter of the butt joint part 401 is slightly smaller than the inner diameter of the limiting part 101. The butt joint part 401 extends into the limiting part 101 on the corresponding side and compresses the sealing ring 5 on the corresponding side, so that reliable sealing between the plastic pipe 2 and the joint 1 is ensured.

The clamp ring is along keeping away from the toper that the direction external diameter of the joint 1 of corresponding side reduces gradually, and locking device is lock sleeve or nut 3, and in this embodiment, locking device is nut 3, and nut 3 is close to the one end inner wall that corresponds the joint 1 of side and is provided with the screw thread, and 3 covers of nut are established outside the joint 1 of corresponding side to with joint 1 threaded connection, nut 3 compresses tightly the clamp ring of corresponding side, makes the clamp ring compress tightly 2 outer walls of plastic tubing. The nut 3 keeps away from the internal diameter that corresponds the one end of side's joint 1 and reduces along the direction of keeping away from the joint 1 that corresponds the side gradually, forms the clamping part to compress tightly the clamp ring through the clamping part, guarantee that clamp ring and plastic tubing 2 combine firmly, and then guarantee to press from both sides tightly plastic tubing 2.

Every clamp ring is formed by the concatenation of two at least curved pressure strip 4, and in this embodiment, pressure strip 4 has two, and every pressure strip 4 is half-circular arc. The taper of each compression plate 4 is 1:33, after the two compression plates 4 are spliced into a compression ring, the diameter of one end, close to the corresponding side, of the joint 1 is adjusted within the range of 24-26 mm, the diameter of one end, far away from the corresponding side, of the joint 1 is adjusted within the range of 24-25 mm, and the outer diameter of one end, close to the corresponding side, of the joint 1 is larger than that of the other end of the compression ring. The clamp ring is divided into two clamp plates 4 which can be repeatedly used, so that the problem that the conventional integral pipe sleeve with taper is disposable is solved, and the cost is saved.

The inner wall of the end, away from the joint 1 on the corresponding side, of each pressure strip 4 is provided with a thread to form a sealing part 402, and when the nut 3 compresses the pressure strips 4, the acting force enables the internal thread of the compression ring to uniformly bite into the outer surface of a pipe sample, so that effective sealing can be formed, and normal test is ensured.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a static hydraulic test of plastics tubular product is with sealed anchor clamps which characterized in that: including connecting (1), clamp ring and locking device, clamp ring one end and joint (1) sealing connection, the clamp ring is for following the round platform form that the direction external diameter of keeping away from joint (1) reduces gradually, and the clamp ring is formed by two piece at least curved pressure strip (4) concatenations, is provided with the portion that compresses tightly on the locking device, and locking device is connected with joint (1) detachable to compress tightly the clamp ring.

2. The sealing clamp for the hydrostatic test of the plastic pipe as claimed in claim 1, wherein: the locking device is a sleeve or a nut, and the locking sleeve or the nut is in threaded connection with the joint (1).

3. The sealing clamp for the hydrostatic test of the plastic pipe as claimed in claim 1, wherein: the pressing part is in a conical shape with the diameter gradually reduced along the direction far away from the joint (1).

4. The sealing clamp for the hydrostatic test of the plastic pipe as claimed in claim 1, wherein: the internal diameter of the one end of joint (1) be greater than the internal diameter of the other end, form spacing portion (101), the external diameter that the clamp ring is close to the one end that connects (1) is less than the diameter at middle part, form butt joint portion (401), butt joint portion (401) stretch into spacing portion (101) in to with spacing portion (101) sealing connection.

5. The sealing clamp for the hydrostatic test of the plastic pipe as claimed in claim 4, wherein: the limiting part (101) is internally provided with a sealing ring (5), and the butt joint part (401) extends into the limiting part (101) and compresses the sealing ring (5).

6. The sealing clamp for the hydrostatic test of the plastic pipe as claimed in claim 1, wherein: threads are disposed around an inner wall of the clamp ring to form a seal (402).

7. The sealing clamp for the hydrostatic test of the plastic pipe as claimed in claim 6, wherein: the sealing part (402) is arranged at one end of the compression ring far away from the joint (1).

8. The sealing clamp for the hydrostatic test of the plastic pipe as claimed in claim 1, wherein: the taper of the pressing plate (4) is 1: 33.

9. The sealing clamp for the hydrostatic test of the plastic pipes as claimed in claim 1 or 8, wherein: the outer diameter adjusting range of one end, close to the joint (1), of the compression ring is 24-26 mm, and the adjusting range of the outer diameter of one end, far away from the joint (1), of the compression ring is 24-25 mm.