Expansion plug type connector for checking air tightness

Abstract

The utility model discloses an expansion plug type joint for checking air tightness, which relates to the technical field of joints and comprises an outer cylinder, an inner cylinder, a spring, an elastic piece claw and a handle, the inner cylinder is arranged in the outer cylinder, an air inlet pipe communicated with an inner cavity of the inner cylinder is arranged on the side face of the inner cylinder, and a driving rod is slidably connected to the center of the inner cylinder. The driving rod is sleeved with the spring and located between the bottom wall of the inner barrel and a baffle disc on the driving rod, the driving rod is sleeved with the elastic piece claw and located at the bottom of the outer barrel, a plurality of gaps are evenly distributed in the elastic piece claw, an O-shaped ring is arranged on a clamping groove of the elastic piece claw, the driving rod is provided with a driving disc located in the elastic piece claw, and an inserting block is arranged at the lower end of the driving rod. According to the invention, the copper pipe orifice of the copper water jacket is sealed through the rubber pad on the insertion block, and the handle is rotated to move the driving rod to deform the elastic sheet claw and the O-shaped ring on the elastic sheet claw, so that the O-shaped ring abuts against the copper pipe orifice of the copper water jacket, the sealing stability and effect of the copper pipe orifice of the copper water jacket are improved, and the air tightness detection efficiency of the copper water jacket is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of joint, concretely relates to a plug -in joint for checking air tightness. BACKGROUND

[0002] The copper jacket works under the harsh working conditions of high temperature, high erosion and high scouring, requires that it has good sealing performance to avoid damage due to overheating, leading to the forced shutdown of the furnace for overhaul. The air tightness detection helps to evaluate the reliability of the copper jacket. When the air tightness of the copper jacket is detected, gas needs to be introduced into the copper pipe opening of the copper jacket. However, the process of disassembling and assembling the gas inlet joint on the pipe opening is relatively complicated and low in efficiency. SUMMARY

[0003] The utility model discloses a kind of plug-in joints for checking air tightness, to overcome the above-mentioned defects in prior art.

[0004] A kind of plug-in joint for checking air tightness, including outer tube, inner tube, spring, spring piece claw and handle, the inner tube is located in outer tube, the side surface of the inner tube is equipped with the gas inlet pipe being communicated with its inner cavity, the center of the inner tube is slidably connected with driving rod, the spring is sleeved on driving rod and located between the bottom wall of inner tube and the baffle on driving rod, the spring piece claw is sleeved on driving rod and located at the bottom of outer tube, a plurality of gaps are uniformly distributed on elastic claw, O-ring is arranged on the clamping groove of elastic claw, driving disc is arranged in driving rod, the lower end of driving rod is provided with insertion block, rubber pad is arranged in the mounting groove of insertion block, the side surface of driving rod is provided with the gas inlet hole being communicated with driving rod and the gas channel in insertion block, the handle is rotatably connected with outer tube by damping pivot, the eccentric driving portion of handle is in abutment with the top of driving rod.

[0005] Preferably, the gas inlet hole is provided with a plurality of and is uniformly distributed along the circumference of driving rod.

[0006] Preferably, the clamping groove is provided with a plurality of, and O-ring is arranged in each clamping groove.

[0007] Preferably, the side surface of the outer tube is provided with a side slot for the handle to extend out.

[0008] Preferably, the gas inlet pipe is rotatably connected with the gas inlet joint, and the inner wall of the gas inlet joint is provided with internal threads.

[0009] Preferably, the outer tube and the inner tube are connected by welding.

[0010] Preferably, the driving disc is a rounded table structure.

[0011] The utility model has the advantages that:

[0012] The application seals the copper pipe port of the copper water jacket through the rubber pad on the plug, and then drives the rod to move by rotating the handle to deform the elastic piece claw and the O-shaped ring thereon, so that the O-shaped ring abuts against the copper pipe port of the copper water jacket, thereby improving the sealing stability and effect of the copper pipe port of the copper water jacket. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a front view of the whole utility model.

[0014] Figure 2 It is Figure 1 It is a local enlarged view of A in the middle.

[0015] Figure 3 It is a side view of the whole utility model.

[0016] Figure 4 It is a structural schematic view of the utility model when not installed in the outer cylinder.

[0017] Figure 5 And Figure 6 It is a structural schematic view of the driving rod and the upper part thereof at different angles.

[0018] In the figure, 1, outer cylinder; 11, side slot; 2, inner cylinder; 21, air inlet pipe; 22, air inlet joint; 3, driving rod; 31, baffle disc; 32, spring; 33, air inlet hole; 34, air channel; 4, elastic piece claw; 41, gap; 42, O-shaped ring; 5, driving disc; 6, plug; 61, rubber pad; 7, handle; 71, eccentric driving part. DETAILED DESCRIPTION

[0019] The specific embodiments of the utility model are further explained in detail below by comparing the embodiments and describing the utility model, so as to help the skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical scheme of the utility model.

[0020] As Figures 1-6The utility model provides a kind of expansion plug joint for checking air tightness, including outer tube 1, inner tube 2, spring 32, spring sheet claw 4 and handle 7, the inner tube 2 is located in outer tube 1, and outer tube 1 is welded between inner tube 2, the side of inner tube 2 is equipped with the air inlet pipe 21 being communicated with its inner cavity, the center of inner tube 2 is slidably connected with driving rod 3, spring 32 is sleeved on driving rod 3 and is located between the bottom wall of inner tube 2 and the baffle disc 31 on driving rod 3, spring sheet claw 4 is sleeved on driving rod 3 and is located at the bottom of outer tube 1, a plurality of gaps 41 are uniformly distributed on elastic claw, O-ring 42 is equipped on the clamping groove of elastic claw, driving disc 5 in elastic claw is equipped on driving rod 3, and driving disc 5 is inverted circular platform structure, the lower end of driving rod 3 is equipped with plug 6, rubber pad 61 is equipped in the mounting groove of plug 6, the side of driving rod 3 is equipped with the air inlet hole 33 being communicated with driving rod 3 and air passage 34 in plug 6, handle 7 is rotatably connected with outer tube 1 by damping pivot, the eccentric driving part 71 of handle 7 is in abutment with the top of driving rod 3, the side of outer tube 1 is equipped with the side slot 11 for handle 7 to extend.

[0021] It should be noted that the air inlet hole 33 is provided with a plurality of and is uniformly distributed along the circumference of driving rod 3, so that air passage 34 can quickly intake air.

[0022] In addition, the clamping groove is provided with a plurality of, and O-ring 42 is equipped in each clamping groove, to improve the abutment effect of pipe mouth.

[0023] In addition, air inlet connector 22 is rotatably connected on air inlet pipe 21, and internal thread is provided on the inner wall of air inlet connector 22, to facilitate the quick connection of air inlet connector 22 and gas conveying pipe.

[0024] Specific implementation and principle:

[0025] In use, air inlet connector 22 of the utility model is connected with gas conveying pipe, then plug 6 is aligned with copper pipe mouth of copper water jacket to be tested and is inserted into copper pipe mouth, rubber pad 61 on plug 6 is sealed with pipe mouth, then handle 7 is bent, plug 6 is moved in pipe mouth by eccentric driving part 71 on handle 7 extruding driving rod 3, driving disc 5 on driving rod 3 extrudes elastic claw outward, O-ring 42 on elastic claw is deformed, O-ring 42 is in contact with inner wall of pipe mouth, then gas is conveyed into the air inlet hole 33 of driving rod 3 through air inlet pipe 21 and inner tube 2, and is conveyed into copper water jacket through air passage 34 in plug 6 to test pressure, after copper water jacket testing operation is completed, the device is depressurized, handle 7 is rotated reversely, driving rod 3 moves under the action of spring 32, elastic claw and O-ring 42 reset, plug 6 is pulled out from pipe mouth, and testing is finished.

[0026] In summary, the application seals the copper pipe port of the copper water jacket through the rubber pad 61 on the plug 6, and then rotates the handle 7 to move the driving rod 3 to deform the elastic sheet claw 4 and the O-shaped ring 42 thereon, so that the O-shaped ring 42 abuts against the copper pipe port of the copper water jacket, thereby improving the sealing stability and effect of the copper pipe port of the copper water jacket. When disassembling, only the handle 7 needs to be reversely rotated, and under the elastic force of the spring 32, the elastic sheet claw 4 and the O-shaped ring 42 thereon are reset, so that the plug 6 can be quickly pulled out of the copper pipe port of the copper water jacket, thereby improving the detection efficiency of the air tightness of the copper water jacket.

[0027] The above-mentioned embodiments of the utility model do not constitute a limitation on the protection scope of the utility model. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A bull plug fitting for checking air tightness, characterized by: The utility model provides a spring piece claw (4) and handle (7) including outer tube (1), inner tube (2), spring (32), the spring piece claw (4) and handle (7), the inner tube (2) is located in outer tube (1), the side of inner tube (2) is equipped with with its inner chamber intercommunication air pipe (21), the center of inner tube (2) is slidably connected with drive rod (3), spring (32) is set on drive rod (3) and is located between the bottom wall of inner tube (2) and the baffle (31) on drive rod (3), spring piece claw (4) is set on drive rod (3) and is located in the bottom of outer tube (1), and the elastic claw is uniformly distributed with a plurality of gaps (41), and the clamping groove of elastic claw is equipped with O type ring (42), and drive rod (3) is equipped with the drive disc (5) in the elastic claw, and the lower end of drive rod (3) is equipped with the plug -in block (6), and the mounting groove of plug -in block (6) is equipped with rubber pad (61), the side of drive rod (3) is equipped with with air channel (34) in drive rod (3) and plug -in block (6) intercommunication air hole (33), handle (7) is rotatably connected with outer tube (1) through the damping pivot, and the eccentric drive part (71) of handle (7) is in butt joint with the top of drive rod (3).

2. A bull plug fitting for checking air tightness according to claim 1, characterized in that: The air hole (33) is provided with a plurality of and is uniformly distributed along the circumference of drive rod (3).

3. A bull plug fitting for checking air tightness according to claim 1, characterized in that: The clamping groove is provided with a plurality of, and each clamping groove is provided with O type ring (42).

4. A bull plug fitting for checking air tightness according to claim 1, characterized in that: The side of outer tube (1) is equipped with the lateral groove (11) for the handle (7) to extend.

5. A bull plug fitting for testing gas tightness according to claim 1, characterized in that: The air pipe (21) is rotatably connected with air inlet connector (22), and the inner wall of air inlet connector (22) is provided with internal thread.

6. A bull plug fitting for testing gas tightness according to claim 1, characterized in that: The outer tube (1) and inner tube (2) are connected by welding.

7. A bull plug fitting for testing gas tightness according to claim 1, characterized in that: The drive disc (5) is inverted round platform structure.

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