Sealing device for water pressure test of small-diameter random-length steel tube
A hydraulic test and sealing device technology, which is applied in the connection of packing seal with fluid pressure, the use of stable tension/pressure to test the strength of materials, pipes/pipe joints/pipe fittings, etc., can solve the inconvenient operation and structure Complicated, bulky and other problems, to achieve the effect of flexible use and operation, simple and reasonable structure, and improved accuracy and efficiency
Active Publication Date: 2011-08-03
泰州诚德钢管有限公司
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Problems solved by technology
[0002] The existing steel pipe hydrostatic test equipment has complex structure, large volume, high cost and inconvenient operation
For small diameter, super long (indeterminate length) steel pipes, the hydraulic press can do nothing
Method used
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Embodiment Construction
[0016] Such as figure 1 As shown, it is a small-diameter variable-length steel pipe hydraulic test sealing device, including a symmetrically arranged head device and a tail device. The head device and the tail device respectively include screw rods 5, and each screw rod 5 is axially provided with diversion holes 15. Each screw 5 is respectively sleeved with a rubber sealing ring 3, an inner tapered sleeve 4, an expansion sleeve 6 and an outer tapered sleeve 7, and each inner tapered sleeve 4 is respectively arranged on one side of the corresponding rubber sealing ring 3, and each rubber seal The other side of the ring 3 is provided with first nuts 1 respectively, and the first nuts 1 are screwed to the inner end of the screw rod 5 , and a first washer 2 is respectively provided between each first nut 1 and the rubber sealing ring 3 .
[0017] Each inner tapered sleeve 4 is respectively inserted in the inner end of the corresponding expansion sleeve 6 , and each outer tapered s...
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The invention discloses a sealing device for a water pressure test of a small-diameter random-length steel tube, which relates to a sealing device for a water pressure test of a steel tube. The sealing device comprises a head device and a tail device which are symmetrically arranged and respectively comprise a screw; each screw is internally and axially provided with a diversion hole; a rubber sealing ring, an inner conical sleeve, an expansion sleeve and an outer conical sleeve are respectively sleeved on each screw; a first nut is respectively arranged on one side of each rubber sealing ring; each expansion sleeve is subdivided into two to four blocks along the axial direction and a pawl is arranged on the outer surface of each expansion sleeve; a second nut is arranged at the outer endof each outer conical sleeve; the outer end of the screw of the tail device is in threaded connection with a third nut the outer end of which is provided with an end enclosure; a sealing pad is arranged between the outer end of the screw and the third nut; and two radial sides of the third nut are respectively connected with a water outlet pipe communicated with the diversion hole, wherein the outer end of one water outlet pipe is connected with a plug. The invention has the advantages of simple, reasonable and compact structure, easy production and manufacture and low cost. In addition, the invention has flexible use and operation and improves the precision and the efficiency for the water pressure test of the steel tube.
Description
technical field [0001] The invention relates to a sealing device for a steel pipe hydraulic test, in particular to a hydraulic test for medium and small-diameter, ultra-long (indeterminate) pipes in the boiler industry, and belongs to the technical field of hydraulic test equipment. Background technique [0002] The existing steel pipe hydrostatic test equipment has complex structure, large volume, high cost and inconvenient use and operation. For small diameter, super long (indeterminate length) steel pipes, the hydraulic press is helpless. Contents of the invention [0003] The purpose of the present invention is mainly to provide a small-diameter variable-length steel pipe hydrostatic test sealing device with simple structure and convenient use. [0004] The object of the present invention is achieved in this way: a small-diameter variable-length steel pipe hydrostatic test sealing device includes symmetrically arranged head devices and tail devices, and the head devic...
Claims
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IPC IPC(8): G01N3/12G01M3/02F16L17/00
Inventor 施军王林林罗伟
Owner 泰州诚德钢管有限公司