Device for testing water pressure of end part of threaded steel pipe

Abstract

The utility model relates to the technical field of water pressure testing devices, and discloses a threaded steel pipe end water pressure testing device which comprises a screw rod and a shaft sleeve, the shaft sleeve is arranged in the screw rod, a first sealing ring is arranged between the screw rod and the shaft sleeve, an expansion sleeve is arranged at the position, away from the first sealing ring, of the shaft sleeve, and the expansion sleeve is connected with the screw rod. A second sealing ring is arranged between the shaft sleeve and the expansion sleeve, a chock plug is arranged in the position, away from the second sealing ring, of the expansion sleeve, a top plate is arranged on the side, away from the expansion sleeve, of the chock plug, and a long nut is arranged on the position, away from the chock plug, of the top plate. Water only needs to be pumped into the water pressure high-pressure hose to flow into the screw rod and flow into the steel pipe to be detected, and after certain water pressure is reached, whether the pipe wall leaks water or not is checked.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of water pressure testing device, specifically relates to a screw steel pipe end water pressure testing device. BACKGROUND

[0002] Chinese patent: a small diameter indefinite size steel pipe hydrostatic test sealing device, grant announcement number: CN201653814U, the utility model sets up fixing device and sealing device and flow guide device and exhaust device, uses the flexible operation, improves the precision and efficiency of steel pipe hydrostatic test, can be widely used in the hydrostatic test of small and medium caliber pipe, especially can be used for the small caliber super long pipe (indefinite size) for boiler, but the existing boiler uses the inner thread seamless steel pipe inner wall to have several spiral tooth type, the inner thread seamless steel pipe single pipe and pipe row after processing are carried out water pressure test, and the inner thread seamless steel pipe is viewed, whether the steel pipe appears cracking or welds in the processing process.

[0003] Because the inner thread seamless steel pipe inner wall has several spiral tooth type, the inner wall is high, the conventional inner expansion type water pressure device only uses the steel pipe with the smooth pipe of inner wall, cannot use the inner thread seamless steel pipe, therefore needs to design the inner thread seamless steel pipe inner expansion type water pressure device according to the characteristics of the inner thread seamless steel pipe, blocks the other end steel pipe, and whether the outer wall of pipe leaks is viewed by hitting the water pressure into the pipe, but the existing water pressure sealing plate needs additional sealing plate, and the good material also needs to be welded at the both ends of the steel pipe, and additional material cost, welding time and steel pipe polishing time are also needed, therefore a screw steel pipe end water pressure testing device needs to be designed to solve the above problems. Utility model content

[0004] The utility model discloses a screw steel pipe end water pressure testing device, after assembling the water pressure device, only need to hit the water pressure into the water pressure high pressure hose and flow into the screw rod, reach certain water pressure after, view whether the pipe wall has the condition of leakage.

[0005] To achieve the above object, the utility model provides the following technical scheme: a screw steel pipe end water pressure testing device, including screw rod and shaft sleeve, the shaft sleeve is arranged in the inside of screw rod, be equipped with the first sealing washer between screw rod and shaft sleeve, the position apart from the first sealing washer of shaft sleeve is provided with the expansion sleeve, be equipped with the second sealing washer between shaft sleeve and expansion sleeve, the inside of the position apart from the second sealing washer of expansion sleeve is equipped with the plug, the side of plug apart from expansion sleeve is equipped with the top plate, the position of top plate apart from plug is equipped with long nut.

[0006] The utility model further improves in that the longitudinal section of the plug is conical.

[0007] The further improvement of the utility model lies in that the longitudinal section of the top plate is T-shaped structure.

[0008] The further improvement of the utility model lies in that the diameter of the screw rod is less than the diameter of the steel pipe.

[0009] The further improvement of the utility model lies in that the long nut is provided with a nut conversion head on the side away from the top plate, and the nut conversion head is provided with a water pressure high-pressure hose on the side away from the long nut.

[0010] The further improvement of the utility model lies in that the front end of the inner diameter of the nut conversion head is the same as the outer diameter of the tail end of the long nut, and such size setting facilitates close installation of the two.

[0011] The further improvement of the utility model lies in that the tail part of the nut conversion head is provided with a clamping structure, the water pressure high-pressure hose is sleeved outside the clamping structure, and the outside of the clamping structure is provided with an anti-skid pad structure, the setting of the anti-skid pad structure can ensure that the overall connection is more stable, prevent the generation of the sliding condition, and ensure the smooth performance of the water pressure test work.

[0012] 1. Easy assembly: only need to assemble the internal expansion type water pressure device into the pipe, lock the long nut, pull the screw rod, extrude the rubber ring and the sealing ring, make the sealing ring adhere to the inner wall of the steel pipe, extrude the plug head to expand the sleeve, make it adhere to the inner wall of the steel pipe, achieve the locking effect, connect the nut joint on the screw rod, connect the water pressure high-pressure hose on the nut joint, and connect the water pressure device with solid core on the other end, the assembly method is the same, mainly block the other end to prevent the water pressure from being reduced;

[0013] 2. Use environment: not affected by environmental temperature and humidity, can be used in harsh environment;

[0014] 3. Easy operation: after assembling the water pressure device, only need to flow the water pressure into the water pressure high-pressure hose, into the screw rod, and into the measured steel pipe, and check whether the pipe wall has water leakage after reaching a certain water pressure. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic view of the device of the utility model.

[0016] Figure 2 It is a structural schematic view of the device of the utility model.

[0017] Figure 3 It is a sectional view structural schematic view of the utility model.

[0018] Figure 4 It is a structural schematic view of the utility model.

[0019] In the diagram: 1-Screw, 2-Shaft sleeve, 3-First sealing ring, 4-Expansion sleeve, 5-Second sealing ring, 6-Plug, 7-Top plate, 8-Long nut, 9-Steel pipe, 10-Nut adapter, 11-High-pressure water hose, 12-Snap-fit ​​structure, 13-Anti-slip pad structure. Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0021] This utility model is referenced. Figure 1 , Figure 2 As shown, a structure for a hydrostatic testing device for the end of a threaded steel pipe is disclosed, comprising a screw 1 and a bushing 2. The bushing 2 is disposed inside the screw 1. A first sealing ring 3 is provided between the screw 1 and the bushing 2. An expansion sleeve 4 is provided on the bushing 2 away from the first sealing ring 3. A second sealing ring 5 is provided between the bushing 2 and the expansion sleeve 4. A plug 6 is provided inside the expansion sleeve 4 away from the second sealing ring 5. A top plate 7 is provided on the side of the plug 6 away from the expansion sleeve 4. A long nut 8 is provided on the top plate 7 away from the plug 6.

[0022] The plug head 6 has a tapered longitudinal section, the top plate 7 has a T-shaped longitudinal section, the screw 1 has a diameter smaller than the steel pipe 9, the long nut 8 is equipped with a nut adapter 10 on the side away from the top plate 7, and the nut adapter 10 is equipped with a high-pressure water hose 11 on the side away from the long nut 8.

[0023] The inner diameter of the front end of the nut adapter 10 is the same as the outer diameter of the tail end of the long nut 8. This size setting facilitates tight installation of the two. The tail end of the nut adapter 10 is provided with a snap-fit ​​structure 12. The high-pressure water hose 11 is sleeved on the outside of the snap-fit ​​structure 12. The outside of the snap-fit ​​structure 12 is provided with an anti-slip pad structure 13. The anti-slip pad structure 13 can ensure a more stable overall connection, prevent slippage, and ensure the smooth progress of the water pressure test.

[0024] 1. The cost of the female thread internal clamping type water pressure expansion plug is lower than that of the water pressure sealing plate: the water pressure device can be reused after the water pressure test; the water pressure sealing plate needs to be sealed on the end face of the steel pipe 9, and two sealing plates are needed on each steel pipe 9, and the sealing plate needs to be cut off after the water pressure, and the cut steel pipe needs to be polished and beveled, which increases the material cost and other working hours.

[0025] 2. The internal thread internal clamping type water pressure expansion plug does not pollute the environment: the water pressure device is installed on the water pressure device, and the water pressure can be achieved by water; the water pressure sealing plate needs to be welded on the steel pipe before water pressure, and welding will produce welding fumes; the internal expansion type water pressure device is designed through repeated attempts, and the operator is the focus, which is convenient for operators to use on site.

[0026] It should be noted that, in this text, relational terms such as first and second are used only to distinguish one entity or action from another, and do not necessarily require or imply that there is any such actual relationship or order between these entities or actions. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present utility model. In the drawings of the present utility model, the filling pattern is only for distinguishing the layers and does not have any other limitations.

[0027] Although embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A threaded steel pipe end hydrostatic testing apparatus, characterized by: The utility model provides a screw rod and a shaft sleeve, the shaft sleeve is arranged inside the screw rod, the first sealing ring is equipped between the screw rod and the shaft sleeve, the shaft sleeve is equipped with the expansion sleeve away from the first sealing ring position, the second sealing ring is equipped between the shaft sleeve and the expansion sleeve, the plug head is equipped inside the expansion sleeve away from the second sealing ring position, the top board is equipped on the side of the plug head away from the expansion sleeve, the long nut is equipped on the side of the top board away from the plug head.

2. The threaded steel pipe end water pressure testing device according to claim 1, characterized in that: The longitudinal section of the plug head is in a conical structure.

3. The threaded steel pipe end water pressure testing device according to claim 1, characterized in that: The longitudinal section of the top board is in a T-shaped structure.

4. The threaded steel pipe end water pressure testing device according to claim 1, characterized in that: The diameter of the screw rod is smaller than the diameter of the steel pipe.

5. The threaded steel pipe end hydraulic testing apparatus of claim 1, wherein: The long nut is installed with a nut conversion head on the side away from the top board, the nut conversion head is installed with a water pressure high-pressure hose on the side away from the long nut.

6. A threaded steel pipe end hydrostatic testing apparatus as defined in claim 5, wherein: The inner diameter of the front end of the nut conversion head is the same as the outer diameter of the tail end of the long nut.

7. The threaded steel pipe end hydraulic testing apparatus of claim 5, wherein: The tail of the nut conversion head is provided with a clamping structure, the water pressure high-pressure hose is sleeved outside the clamping structure, and an anti-skid pad structure is arranged outside the clamping structure.

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