Hubihafu Festival

Abstract

The present invention provides a wall-protecting half joint, wherein two half joint halves are enclosed to form a half joint, and the straight grooves and arc grooves arranged circumferentially on the axial side and end of the half joint halves are used to embed the sealing component halves, and the outer sides of the straight grooves 11 of the two half joint halves are provided with inner and outer protective walls that interlock with each other, and the wall surfaces of the inner and outer protective walls are perpendicular to the connecting surface and end surface of the half joint halves, and the outer side of the root of the inner protective wall is provided with a first fulcrum step as the top fulcrum of the outer protective wall. The first fulcrum step in the above scheme has two functions: one is to increase the rigidity of the straight groove, and the other is to limit the degree of enclosure of the two half joint halves or the deformation of the two half joint halves.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline emergency repair equipment, in particular to a wall protection half joint used for rapid emergency repair of leaking or damaged pipelines. Background Art

[0002] Urban water supply and drainage pipe network systems often use cement, cast iron or galvanized steel pipes. Due to changes in geological conditions or defects in the pipe body itself, pipe rupture accidents occur from time to time. In order to restore the smooth flow of the pipeline in time, the existing technology often uses a quick connector connection of a half joint, that is, two semi-tubular half-type quick connectors are used during emergency repairs to enclose the damaged part C of the pipes A and B in the pipe cavity surrounded by the half joint, and the semicircular joint surface of the half joint 1 is tightened with bolts, and the rubber seal 2 is closed to seal the damaged part C.

[0003] After the repair of a common half joint, although the axial seal between the upper shell and the lower shell is compressed, there will be a certain gap between the flanges of the upper and lower shells, causing the side of the axial seal to be exposed from the gap, which is easy to accelerate aging and has the risk of failure after long-term use. In addition, in order to ensure the sealing performance of the upper shell and the lower shell, the tightening bolts will apply a large pressure to the seal, and the seal in the axial groove will be squeezed out of the sealing groove or burst due to excessive pressure.

[0004] In order to solve the above technical problems, Chinese patent CN106439374A discloses a pipeline repairer, such as Figure 1 The scheme shown is: a raised protective wall is provided on the outer side of the axial sealing groove of the upper shell or the lower shell of the half joint, and when the upper shell and the lower shell are butted against each other, the protective wall closes the gap between the flanges from the outside. When the internal pressure of the half joint is too high, it will deform to a certain extent, such as Figure 2 , 3 The figure shows the comparison before and after deformation in the reference. It can be seen that once the half joint deforms outward, its upper protective wall will fit on the side edge of the lower protective wall and use it as a support point to prevent further deformation. However, the support area is too small, and the deformation of the support area will also squeeze the sealing gasket and easily squeeze it out and deform it. In addition, there is no protective wall structure with a circumferential sealing ring, and the circumferential sealing ring also has the risk of extrusion and rupture. Summary of the invention

[0005] The purpose of the present invention is to provide a wall protection half joint which can effectively prevent the sealing ring from being squeezed and broken due to the deformation of the half joint.

[0006] A wall-protecting half joint, wherein two half joint halves are enclosed to form a half-type pipe joint, and straight grooves and arc-shaped grooves arranged circumferentially on the axial sides and ends of the half joint halves are used to embed the sealing half bodies, and inner and outer protective walls that bite into each other are arranged on the outside of the straight grooves 11 of the two half joint halves, and the wall surfaces of the inner and outer protective walls are perpendicular to the connecting surfaces and end surfaces of the half joint halves, and a first fulcrum step serving as the fulcrum of the top end of the outer protective wall is arranged on the outside of the root of the inner protective wall.

[0007] The first fulcrum step in the above solution has two functions: one is to increase the rigidity of the straight groove; the other is to limit the enclosure degree of the two half-joint halves or the deformation amount of the two half-joint halves. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the prior art structure;

[0009] Figure 2 , 3 It is a schematic diagram of the prior art before and after deformation;

[0010] Figure 4 It is a schematic diagram of the three-dimensional structure of the present invention;

[0011] Figure 5 This is a schematic diagram of the half-body structure of the Haff node;

[0012] Figure 6 is a cross-sectional view of the present invention;

[0013] Figure 7 It is a schematic end view of the present invention. DETAILED DESCRIPTION

[0014] A wall-protecting half joint, wherein two half joint halves 10 are enclosed to form a half-type pipe joint, and straight grooves 11 and arc-shaped grooves 12 arranged circumferentially on the axial sides and ends of the half joint halves 10 are used to embed the sealing half bodies, and inner protective walls 13 and outer protective walls 14 that bite into each other are arranged on the outer sides of the straight grooves 11 of the two half joint halves 10, and the wall surfaces of the inner protective walls 13 and the outer protective walls 14 are perpendicular to the connecting surfaces and end surfaces of the half joint halves 10, and a first fulcrum step 15 serving as the top fulcrum of the outer protective wall 14 is arranged on the outer side of the root of the inner protective wall 13.

[0015] In the above scheme, the first fulcrum step 15 has two functions: one is to increase the rigidity of the straight groove 11, and the other is to limit the degree of enclosure of the two half-joint halves 10 or to limit the deformation of the two half-joint halves 10. When the half-joint expands and deforms outward, the top of the outer protective wall 14 will rest against the outer wall surfaces of the first fulcrum step 15 and the inner protective wall 13. The two work together to prevent the half-joint from further deforming and squeezing the sealing gasket, causing the sealing gasket to be extruded and deformed.

[0016] The arc-shaped end face protection wall 17 is arranged outside the arc-shaped groove 12 of the half-body 10 of the half-joint. The two ends of the end face protection wall 17 are smooth sections that taper toward the end, and the two tapered smooth sections are arc-shaped sections of equal height. The end face protection wall 17 is arranged so that when the half-joint expands outward and deforms into an arch shape, the end face protection walls 17 at both ends can effectively abut against the pipe to form a fulcrum, so that the pipe bears further pressure instead of the sealing gasket, thereby preventing the half-joint from further deforming and squeezing the sealing gasket, causing the sealing gasket to be extruded and deformed.

[0017] The root of the outer protective wall 14 is provided with a second fulcrum step 16 as the fulcrum of the top end of the inner protective wall 13. When the half joint expands and deforms outward, the top end of the inner protective wall 13 will lean against the second fulcrum step 16 to prevent the half joint from further deforming and squeezing the sealing gasket, causing the sealing gasket to be extruded and deformed.

[0018] The inner protective wall 13 is continuously arranged along the outer groove wall of the straight groove 11. The inner protective wall 13 in the above solution is substantially the outer groove wall of the straight groove 11.

[0019] The outer protective wall 14 is arranged in an interval manner along the axial direction of the half joint to avoid the connection bolts, so as to avoid interference with the installation position of the connection bolts.

[0020] The protective walls on the same side of the half joint half body 10 are arranged alternately along the axial direction in the manner of outer protective wall 14-outer protective wall 14 on the other half body-outer protective wall 14. In this way, the two half joint half bodies 10 can apply pressure to each other more evenly when deforming.

[0021] An even number of outer protective walls 14 are provided on the same side of the same half section 10. Thus, the same mold can be used to manufacture two half section halves 10, and the two identical half section halves 10 can be fastened together by simply switching the directions of the half section halves 10.

[0022] Two outer protective walls 14 at the same axial position are disposed on the two half-joint halves 10 .

Claims

1. A wall protection half joint, wherein two half joint halves (10) are enclosed to form a half joint, and the straight grooves (11) and arc grooves (12) arranged circumferentially on the axial side and end of the half joint halves (10) are used to embed the sealing half, characterized in that: An inner protective wall (13) and an outer protective wall (14) that engage with each other are arranged outside the straight grooves (11) of the two half-joint halves (10); the free edges of the inner protective wall (13) and the outer protective wall (14) extend toward the side where the half-joint halves (10) are located on the opposite side; the wall surfaces of the inner protective wall (13) and the outer protective wall (14) are perpendicular to the connecting surface and end surface of the half-joint halves (10); and a first fulcrum step (15) serving as a fulcrum of the top end of the outer protective wall (14) is arranged outside the root of the inner protective wall (13); The inner protective wall (13) is continuously arranged along the outer groove wall of the straight groove (11).

2. The wall protection half joint according to claim 1 is characterized in that: An arc-shaped end face protection wall (17) is arranged outside the arc-shaped groove (12) of the half-body (10), and both ends of the end face protection wall (17) are smooth sections that taper toward the end, and an arc-shaped section of equal height is located between the two smooth sections.

3. The wall protection half joint according to claim 1 or 2, characterized in that: A second fulcrum step (16) serving as a fulcrum at the top end of the inner protective wall (13) is provided on the inner side of the root of the outer protective wall (14).

4. The wall protection half joint according to claim 1 is characterized in that: The outer protective wall (14) is arranged in an interval manner along the axial direction of the half joint to avoid the connection bolts.

5. The wall protection half joint according to claim 1, characterized in that: The protective walls on the same side of the half body (10) of the half joint are arranged alternately along the axial direction in the manner of outer protective wall (14) - outer protective wall (14) on the other half body - outer protective wall (14).

6. The wall protection half joint according to claim 5, characterized in that: An even number of outer protective walls (14) are provided on the same side of the same half section (10).

7. The wall protection half joint according to claim 6 is characterized in that: Two outer protective walls (14) at the same axial position are respectively disposed on the two half-sections (10).

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