Steel pipe hydrostatic test device

Abstract

The utility model relates to the technical field of steel pipe hydrostatic testing, in particular to a steel pipe hydrostatic testing device which comprises a base, a first support arranged at the end of the base, a pressurizing pipe fixedly arranged on the first support, a connecting pipe connected to one end of the pressurizing pipe, a water inlet cavity arranged in the pressurizing pipe, and a water outlet cavity communicated with the connecting pipe. A sealing head is mounted at one end of the pressurizing pipe away from the connecting pipe; a sealing ring is sleeved outside the sealing head; a pressurizing mechanism is mounted on the pressurizing pipe; the sealing ring is arranged between the pressurizing mechanism and the sealing head; the pressurizing mechanism is matched with the sealing head to extrude the sealing ring; a first through hole is formed in the sealing head; the first through hole communicates with the water inlet cavity. The pressurizing mechanism and the sealing head are matched to extrude the sealing ring, friction between the sealing ring and the inner wall of the to-be-tested steel pipe is increased, axial deformation of the sealing ring is avoided, sealing performance is enhanced, and the sealing effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to steel pipe hydrostatic test technical field especially relates to a steel pipe hydrostatic test device. BACKGROUND

[0002] Steel pipe hydrostatic test is an important test method for detecting the quality and performance of steel pipes. Steel pipes will bear the pressure of internal liquid or gas during actual use. Through hydrostatic test, the maximum pressure that the steel pipe can bear can be determined to ensure that it will not fail, such as cracking, deformation, etc. within the design pressure range. According to Pascal's law, the pressure of a liquid is equal in all directions. In the steel pipe hydrostatic test, the two ends of the steel pipe are sealed, water is injected into the steel pipe and pressure is applied. The pressure inside the steel pipe is measured by pressure sensors and other equipment, and the steel pipe is observed for leakage or deformation. When the pressure reaches the specified test pressure, a certain pressure holding time is maintained to fully test the performance of the steel pipe.

[0003] The steel pipe hydrostatic test device currently in use, such as the one disclosed in the patent with announcement number CN218211778U, includes a mounting seat, a pumping mechanism, a driving mechanism, and an inlet and outlet water pipe group. The pumping mechanism includes a cylinder and a piston rod, the cylinder has a mounting shaft perpendicular to its axial direction, the mounting shaft is hinged to the mounting seat, the cylinder has a sliding cavity along its axial direction, and the piston rod has a first end and a second end. The driving mechanism includes a driving unit and a transmission member, the driving unit has an output shaft, the transmission member is fixedly connected to the output shaft at one end and hinged to the transmission shaft at the other end. The inlet and outlet water pipe group includes a first connecting pipe that communicates the water tank and the containing space, and a second connecting pipe that communicates the containing space and the measured component, and the first connecting pipe is provided with a check valve.

[0004] In the above-mentioned scheme, only the sealing ring on the outer wall of the water outlet pipe is used for sealing. As the internal pressure of the measured component increases, the sealing ring is easily deformed in the axial direction, resulting in poor sealing effect. Moreover, different pipe diameters require several sets of different specifications of pressure testing devices, which are not convenient to use and are prone to damage. UTILITY MODEL CONTENTS

[0005] In view of the problem in the prior art that only the sealing ring on the outer wall of the water outlet pipe is used for sealing, and as the internal pressure of the measured component increases, the sealing ring is easily deformed, resulting in poor sealing effect, the utility model provides a steel pipe hydrostatic test device.

[0006] To solve the above-mentioned problems, the utility model adopts the technical scheme that,

[0007] The utility model provides a kind of steel pipe hydrostatic test device, including base, base end is provided with first support, first support is fixedly provided with pressurizing pipe, pressurizing pipe one end is connected with connecting pipe, pressurizing pipe is provided with water inlet cavity, connecting pipe is communicated water inlet cavity, pressurizing pipe is installed with sealing head away from connecting pipe one end;Sealing head is equipped with sealing ring;Pressurizing mechanism is installed on pressurizing pipe;Sealing ring is arranged between pressurizing mechanism and sealing head;Pressurizing mechanism is used to extrude sealing ring with sealing head;Sealing head is provided with first through-hole;First through-hole is communicated water inlet cavity.By pressurizing mechanism and sealing head extrude sealing ring, increase the friction between sealing ring and the inner wall of the steel pipe to be measured, avoid the axial deformation of sealing ring, enhance the sealing property, improve the sealing effect.And can be in different specifications steel pipe hydrostatic test, only replace sealing head and sealing ring, can satisfy the need of different specifications steel pipe hydrostatic test.

[0008] Preferably, the pressurizing mechanism includes a sliding sleeve; the sliding sleeve is slidingly arranged on the pressurizing pipe; a pre-tightening nut is threadedly arranged on the pressurizing pipe; the sliding sleeve is arranged between the pre-tightening nut and the sealing head. The pre-tightening nut is used to push the sliding sleeve to move axially along the pressurizing pipe, extrude the sealing ring, increase the friction between the sealing ring and the inner wall of the steel pipe to be measured, avoid the axial deformation of the sealing ring, and enhance the sealing property.

[0009] Preferably, a pressurizing gasket is installed on the pressurizing pipe; the pressurizing gasket is installed between the sliding sleeve and the sealing ring.

[0010] Preferably, the sliding sleeve is slidingly arranged on a second support; the second support is fixedly arranged in the middle of the base; a pipe clamp is detachably arranged on the base. The stability of the sliding sleeve is ensured.

[0011] Preferably, a circular ring boss is fixedly arranged at the edge of the outer wall of the end of the sealing head. The movement of the sealing ring along the axial direction is facilitated, and the sealing ring is extruded together with the sliding sleeve.

[0012] Preferably, a water return cavity is arranged in the pressurizing pipe; the water return cavity and the water inlet cavity are arranged in parallel; a water inlet valve is connected to the water inlet cavity in the radial direction; a water outlet valve is connected to the water return cavity in the radial direction; a second through-hole is arranged in the sealing head; the second through-hole is communicated with the water return cavity. In use, the other end of the steel pipe to be measured is closed, the connecting pipe is connected to the pressurizing pump, the water flow is pre-fed into the water inlet cavity through the water inlet valve, enters the steel pipe to be measured, the gas in the steel pipe to be measured is discharged through the water return cavity through the water outlet valve, when the water outlet valve discharges water, the water inlet valve and the water outlet valve are closed, and the pressurizing pump pressurizes the steel pipe to be measured through the connecting pipe.

[0013] Preferably, a plug is threadedly arranged at the end of the second through-hole; a water return port is arranged on the sealing head; the center line of the water return port and the center line of the second through-hole are arranged at an angle; the opening end of the water return port is arranged on the circular ring boss. The gas in the steel pipe to be measured is conveniently discharged.

[0014] The utility model discloses a technical scheme can see through above, the utility model discloses a merit is: through the pressing mechanism and the sealing head cooperation extruding sealing ring, increase the friction between sealing ring and the inner wall of the steel pipe to be measured, avoid the axial deformation of sealing ring, strengthen the leakproofness, improved sealing effect. And can carry out hydrostatic test to different specifications steel pipe, only replace sealing head and sealing ring, can satisfy the need of hydrostatic test of different specifications steel pipe. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to make the technical scheme of the utility model more obvious and easy to understand, the following will be to the description needed to use the drawing briefly introduces, obviously, the following description in the drawing is only some embodiments of the utility model, for the ordinary skilled person in the art, under the premise of not paying creative labor, still can obtain other drawings according to these drawings.

[0016] Figure 1 It is the structural schematic diagram of the utility model.

[0017] Figure 2 It is Figure 1 It is the enlarged schematic view of A in the figure.

[0018] Main drawing mark explanation

[0019] 1-base, 2-first support, 3-pressing pipe, 4-connecting pipe, 5-sealing head, 6-sealing ring, 7-sliding sleeve, 8-preloading nut, 9-pressing washer, 10-second support, 11-tube clamp, 12-water inlet valve, 13-water outlet valve, 14-plug;

[0020] 301-water inlet cavity, 302-water return cavity, 501-first through hole, 502-circular ring boss, 503-second through hole, 504-water return port. DETAILED DESCRIPTION

[0021] In order to make the technical scheme of the utility model more obvious and easy to understand, the following will be to the description needed to use the drawing briefly introduces, obviously, the following description in the drawing is only some embodiments of the utility model, for the ordinary skilled person in the art, under the premise of not paying creative labor, still can obtain other drawings according to these drawings.

[0022] Embodiment 1

[0023] As Figures 1-2As shown, a steel pipe hydraulic test device includes a base 1, a first support 2 is arranged at the end of the base 1, a pressurizing pipe 3 is fixedly arranged on the first support 2, a connecting pipe 4 is connected to one end of the pressurizing pipe 3, a water inlet cavity 301 is arranged in the pressurizing pipe 3, the connecting pipe 4 is communicated with the water inlet cavity 301, and a sealing head 5 is installed at the end of the pressurizing pipe 3 away from the connecting pipe 4; a sealing ring 6 is arranged outside the sealing head 5; a pressurizing mechanism is installed on the pressurizing pipe 3; the sealing ring 6 is arranged between the pressurizing mechanism and the sealing head 5; the pressurizing mechanism is used for extruding the sealing ring 6 in cooperation with the sealing head 5; a first through hole 501 is arranged in the sealing head 5; and the first through hole 501 is communicated with the water inlet cavity 301.

[0024] In the above arrangement, the pressurizing mechanism includes a sliding sleeve 7; the sliding sleeve 7 is slidingly arranged on the pressurizing pipe 3; a pre-tightening nut 8 is threadedly arranged on the pressurizing pipe 3; and the sliding sleeve 7 is arranged between the pre-tightening nut 8 and the sealing head 5. The pre-tightening nut 8 is used for pushing the sliding sleeve 7 to move axially along the pressurizing pipe 3, extruding the sealing ring 6, increasing the friction between the sealing ring 6 and the inner wall of the steel pipe to be tested, avoiding the axial deformation of the sealing ring 6, and enhancing the sealing performance. A pressurizing gasket 9 is installed on the pressurizing pipe 3; and the pressurizing gasket 9 is installed between the sliding sleeve 7 and the sealing ring 6. The sliding sleeve 7 is slidingly arranged on a second support 10; the second support 10 is fixedly arranged in the middle of the base 1, so as to ensure the stability of the sliding sleeve 7. A pipe clamp 11 is detachably arranged on the base 1. A circular ring boss 502 is fixedly arranged at the edge of the outer wall of the end of the sealing head 5, so as to facilitate the limitation of the axial movement of the sealing ring 6 and facilitate the extrusion of the sealing ring 6 in cooperation with the sliding sleeve 7.

[0025] In use, the steel pipe hydraulic test device is installed at both ends of the steel pipe to be tested, and the two ends of the steel pipe to be tested are sleeved outside the sealing head 5, the sealing ring 6 and the pressurizing gasket 9 of the corresponding steel pipe hydraulic test device; the connecting pipe 4 of one steel pipe hydraulic test device is connected with a pressurizing pump, and the connecting pipe 4 of the other steel pipe hydraulic test device is connected with a valve. The pressurizing mechanism and the sealing head 5 are used for extruding the sealing ring 6, increasing the friction between the sealing ring 6 and the inner wall of the steel pipe to be tested, avoiding the axial deformation of the sealing ring 6, enhancing the sealing performance, and improving the sealing effect. The pressurizing pump is used for introducing water flow into the water inlet cavity 301 of the pressurizing pipe 3 through the connecting pipe 4, and the water flow enters the steel pipe to be tested; the air in the steel pipe to be tested is discharged from the connecting pipe 4 of the other steel pipe hydraulic test device; when the water in the connecting pipe 4 is continuously discharged, the valve on the connecting pipe 4 is closed. Then, the pressurizing pump increases the pressure to introduce water into the steel pipe to be tested.

[0026] In the water pressure test of different specifications of steel pipes, only the sealing head 5 and the sealing ring 6 are replaced to seal the steel pipe to be tested, so that the needs of the water pressure test of different specifications of steel pipes can be met.

[0027] Example 2

[0028] On the basis of embodiment 1, the backwater cavity 302 is arranged in the pressurizing pipe 3; the backwater cavity 302 is arranged in parallel with the water inlet cavity 301; the water inlet valve 12 is connected to the water inlet cavity 301 along the radial direction; the water outlet valve 13 is connected to the backwater cavity 302 along the radial direction; the second through hole 503 is arranged in the sealing head 5; the second through hole 503 is communicated with the backwater cavity 302; the plug 14 is screwed at the end of the second through hole 503; the backwater outlet 504 is arranged on the sealing head 5; the center line of the backwater outlet 504 is arranged at an angle with the center line of the second through hole 503; the opening end of the backwater outlet 504 is arranged on the annular boss 502; the end of the backwater outlet 504 is preferably arranged at the upper end edge position of the annular boss 502, and the end of the backwater outlet 504 is communicated with the inner cavity of the steel pipe to be tested, so that the gas in the steel pipe to be tested can be easily discharged.

[0029] In use, the other end of the steel pipe to be tested is closed by the second steel pipe water pressure test device or the valve; the connecting pipe 4 of the first steel pipe water pressure test device is connected with the pressurizing pump; the water flow is pre-fed into the water inlet cavity 301 through the water inlet valve 12, and then into the steel pipe to be tested; the gas in the steel pipe to be tested is discharged through the backwater cavity 302 and the water outlet valve 13; when the water outlet valve 13 discharges water, the water inlet valve 12 and the water outlet valve 13 are closed; the pressurizing pump pressurizes the steel pipe to be tested through the connecting pipe 4.

[0030] The above description of the disclosed embodiments enables those skilled in the art to carry out or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A steel pipe hydraulic testing device, comprising a base (1), the end of the base (1) is provided with a first support (2), a pressurizing pipe (3) is fixedly arranged on the first support (2), one end of the pressurizing pipe (3) is connected with a connecting pipe (4), a water inlet cavity (301) is arranged in the pressurizing pipe (3), and the connecting pipe (4) is communicated with the water inlet cavity (301), characterized in that, The pressurizing pipe (3) is provided with a sealing head (5) at the end away from the connecting pipe (4); the sealing head (5) is provided with a sealing ring (6); the pressurizing pipe (3) is provided with a pressurizing mechanism; the sealing ring (6) is arranged between the pressurizing mechanism and the sealing head (5); the pressurizing mechanism is used for extruding the sealing ring (6) in cooperation with the sealing head (5); the sealing head (5) is provided with a first through hole (501); the first through hole (501) is connected with the water inlet cavity (301).

2. The steel pipe hydrostatic testing apparatus according to claim 1, characterized by The pressurizing mechanism comprises a sliding sleeve (7); the sliding sleeve (7) is slidingly arranged on the pressurizing pipe (3); the pressurizing pipe (3) is provided with a pre-tightening nut (8) in a threaded manner; the sliding sleeve (7) is arranged between the pre-tightening nut (8) and the sealing head (5).

3. The steel pipe hydrostatic testing apparatus according to claim 2, characterized by The pressurizing pipe (3) is provided with a pressurizing gasket (9); the pressurizing gasket (9) is arranged between the sliding sleeve (7) and the sealing ring (6).

4. The steel pipe hydrostatic testing apparatus according to claim 3, characterized by The sliding sleeve (7) is slidingly arranged on a second support (10); the second support (10) is fixedly arranged in the middle of the base (1); the base (1) is detachably provided with a pipe clamp (11).

5. The steel pipe hydrostatic testing apparatus according to claim 4, characterized by The sealing head (5) is fixedly provided with a circular ring boss (502) at the edge of the outer wall of the end.

6. The steel pipe hydrostatic testing apparatus according to claim 1 or 5, characterized by The pressurizing pipe (3) is provided with a water return cavity (302); the water return cavity (302) is arranged in parallel with the water inlet cavity (301); the water inlet cavity (301) is connected with a water inlet valve (12) in a radial direction; the water return cavity (302) is connected with a water outlet valve (13) in a radial direction; the sealing head (5) is provided with a second through hole (503); the second through hole (503) is connected with the water return cavity (302).

7. The steel pipe hydrostatic testing apparatus according to claim 6, characterized by The end of the second through hole (503) is provided with a plug (14) in a threaded manner; the sealing head (5) is provided with a water return port (504); the center line of the water return port (504) is arranged at an angle with the center line of the second through hole (503); the opening end of the water return port (504) is arranged on the circular ring boss (502).

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