Clamping and sealing clamp for end of pipe

A pipe and fixture technology, which is applied in the field of pipe end clamping and sealing structure, can solve the problems that pipe clamping and sealing cannot be effectively combined, affect the accuracy of pipe performance experiments, and it is difficult to carry out experiments smoothly, so as to simplify the preparation work, The effect of uniform clamping force distribution and easy installation and removal

Active Publication Date: 2015-12-23
HARBIN INST OF TECH
5 Cites 15 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0003] The present invention is to solve the problem that the clamping and sealing of the existing pipe pull-expansion test experiment are independent of each other, and the two influence each other during use, so it is difficult to ensure the s...
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Method used

[0014] Specific embodiment two: in conjunction with Fig. 1 and Fig. 3, the elastic element 8 of the present embodiment is a coil spring. With such arrangement, it is cheap and easy to obtain, and convenient to use and disassemble. Others are the same as in the first emb...
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Abstract

The invention relates to a clamping and sealing clamp, in particular to a clamping and sealing clamp for the end of a pipe in order to solve the problems that due to the fact that clamping and sealing are mutually independent in an existing pipe tensioning-expanding test experiment and are mutually affected when in use, smooth conduction of the experiment is difficult to guarantee, clamping and sealing of the pipe can not be effectively combined, and the accuracy of the pipe performance experiment is affected. The clamping and sealing clamp comprises a mandrel, a sealing ring, a wedge-shaped block, a carrier plate, a screwing part, an elastic element, an outer clamping ring, N wedge-shaped inner claws, N wedge-shaped outer claws and N ejection rods. The screwing part is in threaded connection with the other end of the mandrel. The mandrel is sleeved with the outer clamping ring. The wedge-shaped block, the N wedge-shaped inner claws and the N wedge-shaped outer claws are arranged between the outer clamping ring and the mandrel. The N wedge-shaped inner claws and the N wedge-shaped outer claws are arranged in the peripheral direction of the mandrel. The part, between the screwing part and the outer clamping ring, of the mandrel is sleeved with the carrier plate and the elastic element. The elastic element abuts against the carrier plate and the outer clamping ring. The clamping and sealing clamp is used for clamping and sealing the end of the pipe during a pipe tensioning-expanding test experiment.

Application Domain

Technology Topic

Image

  • Clamping and sealing clamp for end of pipe
  • Clamping and sealing clamp for end of pipe
  • Clamping and sealing clamp for end of pipe

Examples

  • Experimental program(10)

Example Embodiment

[0010] Specific implementation mode one: combine figure 1 and image 3 Explain that a pipe end clamping and sealing fixture in this embodiment includes a mandrel 1, a sealing ring 2, a wedge block 3, a supporting plate 6, a screw 7, an elastic element 8, an outer collar 9, and N Wedge-shaped inner jaws 4, N wedge-shaped outer jaws 10 and N ejector pins 5; wherein N is a positive integer, and 8≥N≥3; the mandrel 1 is a mandrel with a liquid-filled channel, and one end of the mandrel 1 is two Stepped structure, the other end of the mandrel 1 is processed with a liquid filling port 1-1 connected with the liquid filling channel; the middle section of the mandrel 1 is processed with external threads;
[0011] The screw 7 is threadedly connected to the middle section of the mandrel 1, and the mandrel 1 is covered with an outer collar 9, and a wedge block 3, N wedge-shaped inner jaws 4 and N Wedge-shaped outer claws 10; wedge-shaped blocks 3 are inserted on the mandrel 1, N wedge-shaped inner claws 4 and N wedge-shaped outer claws 10 are respectively arranged along the circumferential direction of the mandrel 1, and the wedge-shaped inner claws 4 and wedge-shaped outer claws 10 are dislocated Arrangement, an annular gap is formed between N wedge-shaped inner claws and N wedge-shaped outer claws, and the annular gap is used for inserting pipe material 11, and a sealing ring is installed between the bottom surface of the large end of the wedge block 3 and the first-order surface of the mandrel 1 2. The two surfaces of the wedge-shaped inner claw 4 in contact with the wedge-shaped block 3 are arc surfaces, and the two surfaces of the wedge-shaped outer claw 10 in contact with the outer collar 9 are arc surfaces;
[0012] A support plate 6 and an elastic element 8 are set on the mandrel 1 between the screw 7 and the outer collar 9, and the ejector rod 5 corresponding to the wedge-shaped outer claw 10 is inserted on the outer collar 9, and the ejector rod The upper end of 5 is connected with the supporting plate 6, the lower end of the push rod 5 is connected with the large end bottom surface of the wedge-shaped outer claw 10, and the elastic element 8 leans against the supporting plate 6 and the outer collar 9.
[0013] The other end of the mandrel 1 of this embodiment is also designed with a pin hole 1-2, so that the mandrel is fixed during the tensile-expansion performance test of the pipe; the bottom surface of the large end of the wedge block 3 is designed with a boss, and the sealing ring 2 is provided Between the boss and the first step of the mandrel 1 , the cross-sectional diameter of the seal ring 2 is greater than the width of the annular groove surrounded by the boss and the first step of the mandrel 1 . The screw 7 can be replaced by a nut. The two faces of the wedge-shaped inner claw 4 and the wedge-shaped block 3 in contact refer to the inner arc surface of the wedge-shaped inner claw 4 and the outer arc surface of the wedge-shaped block 3, which are arranged obliquely. One surface refers to the outer arc surface of the wedge-shaped outer claw 10 and the inner arc surface of the outer collar 9, which are arranged obliquely.

Example Embodiment

[0014] Specific implementation mode two: combination figure 1 and image 3 Note that the elastic element 8 in this embodiment is a coil spring. With such arrangement, it is cheap and easy to obtain, and convenient to use and disassemble. Others are the same as in the first embodiment.

Example Embodiment

[0015] Specific implementation mode three: combination figure 1 and image 3 Note that the sealing ring 2 of this embodiment is an O-ring. With such arrangement, it is cheap and easy to obtain, simple in structure and convenient to use. Others are the same as in the first or second embodiment.
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PUM

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Description & Claims & Application Information

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