Valve connecting piece

Abstract

The utility model relates to the field of valve connecting pieces, and discloses a valve connecting piece which comprises a first connecting pipe, a sleeve and a second connecting pipe, the limiting rings are fixed to the inner walls of the two ends of the sleeve; the elastic opening and closing sheet is fixed on the outer surface of the first connecting pipe; the retraction groove is formed between the first connecting pipe and the connecting position of the elastic opening and closing sheet; and the rubber plug sleeves the outer surface of one end, close to the sleeve, of the second connecting pipe. The elastic opening and closing piece expanding outwards is fixed to the end of the first connecting pipe, the elastic opening and closing piece is pushed into the first connecting pipe, so that one end of the first connecting pipe is inserted into the casing pipe, the first connecting pipe and the casing pipe are rapidly assembled, and during disassembly, the first connecting pipe is pushed towards the casing pipe, so that the first connecting pipe and the casing pipe can be conveniently disassembled. The elastic opening and closing piece is inserted into the second connecting pipe and contracted to be staggered from the limiting ring, so that the elastic opening and closing piece is conveniently separated from the interior of the sleeve, and quick disassembly and assembly of the valve connecting pipe and the connecting piece are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve connecting pieces, in particular to a valve connecting piece. Background Art

[0002] Valves are control components in fluid conveying systems, with functions such as shutoff, regulation, diversion, prevention of backflow, pressure stabilization, diversion or overflow pressure relief. Valves used in fluid control systems come in a wide variety of varieties and specifications, from the simplest shut-off valves to various valves used in extremely complex automatic control systems. Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. Valves are also divided into cast iron valves, cast steel valves, chrome-molybdenum steel valves, chrome-molybdenum-vanadium steel valves, duplex steel valves, plastic valves, non-standard customized valves, etc. according to their materials.

[0003] When connecting a valve to a pipeline, a valve connector is required. Existing valve connectors are connected to pipelines by using bolts. However, connecting pipelines with bolts can easily damage the pipelines. Moreover, the bolts will rust after long-term use and are not easy to disassemble later. Utility Model Content

[0004] In view of the deficiencies in the prior art, the present invention provides a valve connector to solve the problems mentioned in the above background.

[0005] The utility model provides the following technical solutions:

[0006] The utility model discloses a valve connecting piece, comprising a first connecting pipe and a sleeve plugged into one end of the first connecting pipe.

[0007] A second connecting pipe, one end of which is sleeved on a side of the sleeve away from the first connecting pipe;

[0008] Limiting rings, fixed to the inner walls of both ends of the casing;

[0009] An elastic opening and closing piece is fixed to the outer surface of the first connecting pipe near one end of the sleeve and expands outward as a whole;

[0010] A retraction groove is provided between the first connecting tube and the connection position of the elastic opening and closing piece;

[0011] The rubber plug is sleeved on the outer surface of the second connecting pipe close to one end of the sleeve.

[0012] Furthermore, an anti-slip block is fixed to the outer surface of the second connecting pipe close to one end of the sleeve, and the anti-slip block is located inside the sleeve.

[0013] Furthermore, the rubber plug is in a truncated cone shape as a whole, and the diameter of the rubber plug is larger at one end close to the anti-dropping block, and becomes smaller as it extends toward the outside of the sleeve.

[0014] Furthermore, a sealing gasket is fixed at the clamping position between the elastic opening and closing piece and the limiting ring.

[0015] Furthermore, a retaining ring is fixed on one side of the limiting ring located inside the sleeve and close to the inner ring.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The utility model has an outward-expanding elastic opening and closing piece fixed at the end of the first connecting tube. By pushing the elastic opening and closing piece into the first connecting tube, one end of the first connecting tube is inserted into the sleeve, thereby realizing rapid assembly of the first connecting tube and the sleeve. During disassembly, by pushing the first connecting tube toward the sleeve, the elastic opening and closing piece is inserted into the second connecting tube, and the elastic opening and closing piece is contracted and staggered with the limit ring, thereby facilitating separation from the sleeve, thereby realizing rapid disassembly and assembly of the valve connecting tube and the connecting piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0019] Figure 2 It is a cross-sectional view of the utility model;

[0020] Figure 3 This is a split three-dimensional structural diagram of the utility model;

[0021] The numbers in the figure represent: 1. first connecting pipe; 2. sleeve; 3. second connecting pipe; 4. limiting ring; 5. elastic opening and closing piece; 6. retraction groove; 7. anti-slip block; 8. rubber plug; 9. sealing gasket. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figure 1-3, including a first connecting tube 1, a sleeve 2 plugged into one end of the first connecting tube 1, a second connecting tube 3, one end of which is sleeved on the side of the sleeve 2 away from the first connecting tube 1; a limiting ring 4, fixed to the inner wall of both ends of the sleeve 2; an elastic opening and closing piece 5, fixed to the outer surface of the first connecting tube 1 close to the end of the sleeve 2, and expanding outward as a whole, the maximum diameter of the elastic opening and closing piece 5 is larger than the inner diameter of the limiting ring 4, the end of the first connecting tube 1 close to the elastic opening and closing piece 5 is pushed into the sleeve 2 by extrusion, the elastic opening and closing piece 5 contacts the limiting ring 4 during the movement, and is squeezed and deformed by the limiting ring 4, The elastic opening and closing piece 5 is contracted inwardly, thereby changing the expansion diameter, so that the elastic opening and closing piece 5 can smoothly enter the interior of the sleeve 2. When the elastic opening and closing piece 5 enters the interior of the sleeve 2, the side surface is staggered with the limiting ring 4, so that the pressure on the elastic opening and closing piece 5 is reduced, so that the elastic opening and closing piece 5 releases the pressure and returns to its original state. The bottom of the elastic opening and closing piece 5 that has returned to its original state can be engaged with the limiting ring 4 to prevent the first connecting tube 1 connected to the elastic opening and closing piece 5 from being separated from the interior of the sleeve 2; the retraction groove 6 is provided between the connection position of the first connecting tube 1 and the elastic opening and closing piece 5. The retraction groove 6 makes the elastic opening and closing piece 5 have a The rubber plug 8 is sleeved on the outer surface of the second connecting tube 3 near the end of the sleeve 2. The rubber plug 8 is in the shape of a truncated cone. The diameter of the rubber plug 8 near the anti-dropping block 7 is larger, and the smaller it is as it extends to the outside of the sleeve 2. When the second connecting tube 3 moves unexpectedly in the direction away from the first connecting tube 1, the more it moves outward, the more the gap between the second connecting tube 3 and the limiting ring 4 is occupied by the rubber plug 8, thereby making it more difficult for the second connecting tube 3 to move, further improving the sealing when the second connecting tube 3 is connected to the sleeve 2, and ensuring the stability of the connection between the second connecting tube 3 and the sleeve 2. Qualitatively, the end with the larger diameter of the rubber stopper 8 rests on the surface of the anti-detachment block 7. When the second connecting tube 3 is inserted into the sleeve 2, the rubber stopper 8 is located between the sleeve 2 and the second connecting tube 3, sealing the connecting gap between the sleeve 2 and the second connecting tube 3. When the first connecting tube 1 needs to be disconnected from the sleeve 2, the first connecting tube 1 is moved toward the second connecting tube 3, so that the end of the elastic opening and closing piece 5 is inserted into the second connecting tube 3. The elastic opening and closing piece 5 is contracted inwardly through the second connecting tube 3, so that the elastic opening and closing piece 5 can smoothly break away from the restriction of the limit ring 4 and exit the interior of the sleeve 2.

[0024] An anti-slip block 7 is fixed to the outer surface of the second connecting tube 3 near one end of the sleeve 2. The anti-slip block 7 is located inside the sleeve 2. The anti-slip block 7 overlaps with the limiting ring 4 inside the sleeve 2 to prevent the end of the second connecting tube 3 from detaching from the inside of the sleeve 2. The other side of the anti-slip block 7 abuts against the outer surface of the elastic opening and closing piece 5 to prevent the second connecting tube 3 from continuously moving toward the side of the first connecting tube 1 when unexpected movement occurs.

[0025] A sealing gasket 9 is fixed at the engaging position between the elastic opening and closing piece 5 and the limiting ring 4. When the end of the elastic opening and closing piece 5 falls on the surface of the limiting ring 4, it contacts the sealing gasket 9 first. The more the elastic opening and closing piece 5 moves toward the limiting ring 4, the tighter the pressure with the sealing gasket 9 becomes.

[0026] The limiting ring 4 is located on one side of the inside of the sleeve 2 and a retaining ring is fixed near the inner ring position. When the elastic opening and closing piece 5 is inserted into the sleeve 2, the elastic opening and closing piece 5 moves a distance greater than the retaining ring. After the elastic opening and closing piece 5 releases pressure and expands, a gap is formed between the elastic opening and closing piece 5 and the first connecting tube 1. When the elastic opening and closing piece 5 is engaged with the limiting ring 4, the retaining ring is located in the gap between the elastic opening and closing piece 5 and the first connecting tube 1. When the second connecting tube 3 moves unexpectedly and moves toward the first connecting tube 1, the elastic opening and closing piece 5 contracts inward. When the inner wall of the elastic opening and closing piece 5 touches the retaining ring, the contraction movement can be stopped, so that the elastic opening and closing piece 5 can continue to be engaged with the limiting ring 4, thereby ensuring the connection stability between the first connecting tube 1 and the sleeve 2.

[0027] When the first connecting tube 1 moves toward the outside of the sleeve 2, the bottom of the elastic opening and closing piece 5 and the inner wall of the second connecting tube 1 are pressed against each other, and the outer wall of the elastic opening and closing piece 5 and the inner wall of the second connecting tube 3 are pressed against each other, thereby reducing the range of movement of the first connecting tube 1. When the second connecting tube 3 moves toward the first connecting tube 1, the elastic opening and closing piece 5 shrinks a certain amount, and the inner wall abuts against the retaining ring, limiting the shrinkage range of the elastic opening and closing piece 5, thereby controlling the continued movement of the second connecting tube 3; when the second connecting tube 3 moves toward the outside of the sleeve 2, the gap between the second connecting tube 3 and the sleeve 2 is occupied by the rubber stopper 8, which reduces the range of movement of the second connecting tube 3, thereby controlling the movement of the second connecting tube 3; when the first connecting tube 1 is inspected and disassembled, the first connecting tube 1 and the second connecting tube 3 are pushed toward the sleeve 2, so that the elastic opening and closing piece 5 is staggered with the retaining ring. After the elastic opening and closing piece 5 enters the interior of the second connecting tube 3, it begins to shrink inward until the diameter after shrinkage is smaller than the inner diameter of the limit ring 4, so that the elastic opening and closing piece 5 can be detached from the interior of the sleeve 2, thereby causing the end of the first connecting tube 1 fixed with the elastic opening and closing piece 5 to also detach from the interior of the sleeve 2.

[0028] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A valve connector, comprising a first connecting pipe (1), a sleeve (2) plugged into one end of the first connecting pipe (1), It is characterized by: Also included are: A second connecting pipe (3), one end of which is sleeved on a side of the sleeve (2) away from the first connecting pipe (1); Limiting rings (4) are fixed to the inner walls of both ends of the sleeve (2); An elastic opening and closing piece (5) is fixed on the outer surface of one end of the first connecting pipe (1) close to the sleeve (2) and expands outward as a whole; A retraction groove (6) is provided between the connection position of the first connecting tube (1) and the elastic opening and closing piece (5); The rubber stopper (8) is sleeved on the outer surface of the second connecting pipe (3) near one end of the sleeve (2).

2. The valve connector according to claim 1, characterized in that: An anti-slip block (7) is fixed to the outer surface of one end of the second connecting pipe (3) close to the sleeve (2), and the anti-slip block (7) is located inside the sleeve (2).

3. The valve connector according to claim 1, characterized in that: The rubber plug (8) is in the shape of a truncated cone as a whole. The diameter of the rubber plug (8) is larger at one end close to the anti-fall-off block (7), and becomes smaller as it extends toward the outside of the sleeve (2).

4. The valve connector according to claim 1, characterized in that: A sealing gasket (9) is fixed at the clamping position between the elastic opening and closing piece (5) and the limiting ring (4).

5. The valve connector according to claim 1, characterized in that: A retaining ring is fixed on one side of the limiting ring (4) located inside the sleeve (2) and close to the inner ring.

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