CN204300579U - The fast access node structure of hose and rigid joint - Google Patents

Abstract

The fast access node structure of a kind of hose and rigid joint, comprise the rigid joint body of hose, nut cap, hollow, the outer section of rigid joint body is formed with external screw thread, and nut cap is formed with the internal thread coordinated with rigid joint body, and nut cap is twisted and is connected on rigid joint external section of outside; The cap central authorities of nut cap are provided with the hollow hole passed for hose; Water hole fixing compact is connected with rigidity interpolation pipe, is formed with annular gap between rigidity interpolation pipe and the outer section of rigid joint body; Described hose is sebific duct, is also arranged with bellows outside sebific duct, and the end of bellows and sebific duct is arranged in described annular gap; The outer section of rigidity interpolation pipe is inserted in sebific duct actively, and the outer section of rigidity interpolation pipe is tightened from radial direction by sebific duct; Be arranged with button in C font elasticity outside bellows, the cap inner surface of nut cap is formed with tapering, and in C font elasticity, button bit is between the cap and rigid joint body end face of nut cap.The utility model is easy to operate, and it is firm to connect, and good seepage-proof property.

Description

Quick connection structure of soft water pipe and rigid joint

technical field

The utility model belongs to the technical field of the joint structure of the water flow channel, and in particular relates to a quick connection structure of a soft water pipe and a rigid joint.

Background technique

In order to import or export water, the water storage container is generally provided with a joint on the container wall. The joint is generally rigid, so it is called a rigid joint body. The rigid joint body is exposed outside the container wall, and its interior is hollow to form a water hole. Quickly connect (commonly known as "quick connect") the flexible water hose to the exposed rigid body to transfer water into or out of the water storage container.

The quick connection structure of the traditional soft water pipe and rigid joint is as follows: the exposed part of the rigid joint body is formed with external threads, and the end of the soft water pipe is covered with a nut cap, and the center of the nut cap cap is provided with a hollow hole for the soft water pipe to pass through , There is a rubber washer between the nut cap and the end face of the rigid joint body. When the nut cap is tightened outside the rigid joint body, the rubber washer is subjected to the axial clamping force between the nut cap cap and the end face of the rigid joint body to realize the joint position water seal.

But there is following shortcoming in above-mentioned traditional structure:

1. It needs to rely on rubber gaskets for sealing, and rubber gaskets are prone to aging after being heated, and water seepage is prone to occur after aging;

2. It is necessary to tighten the nut cap to exert axial pressure on the rubber washer, but because the nut cap has a tendency to loosen under the reaction of the rubber washer, the sealing performance of the rubber washer is not easy to maintain for a long time, and it needs to be larger when tightening Tightening force must rely on tools, and it is difficult to tighten with bare hands; while using tools further requires an operating space for the tool to rotate;

3. The length of the line of defense to prevent water seepage is short. The length of the line of defense that the rubber gasket can prevent water seepage is less than the radial width of the rubber washer, or equivalent to the thickness of the end face of the rigid joint body, generally not exceeding 1 mm. Effectively preventing water seepage means that the line of defense is lost. After the water passes over the rubber gasket, the subsequent parts cannot prevent water seepage.

Due to the above reasons, the quick-connect structure of traditional soft water pipes and rigid joints is not suitable for equipment with high anti-seepage requirements, nor is it suitable for equipment that can be assembled by hand (for example, some equipment requires Tighten the nut by hand).

Contents of the invention

The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a quick connection structure between a soft water pipe and a rigid joint, which is easy to operate, reliable in connection, and has a good anti-seepage effect.

Its purpose can be achieved according to the following scheme: the quick connection structure between the soft water pipe and the rigid joint includes a soft water pipe, a nut cap, and a hollow rigid joint body, the rigid joint body is formed with water holes, and the outer section of the rigid joint body is formed with external threads , the nut cap is formed with an internal thread that cooperates with the rigid joint body, and the nut cap is screwed on the outer part of the rigid joint body; the center of the cap of the nut cap is provided with a hollow hole for the soft water pipe to pass through; it is characterized in that the water hole is fixed A rigid inner cannula is tightly connected, and an annular gap is formed between the rigid inner cannula and the outer section of the rigid joint body; the soft water hose is a rubber hose, and a bellows is set outside the rubber hose, and the ends of the bellows and the rubber hose are located at the The outer section of the rigid inner cannula is movably inserted into the rubber tube, and the rubber tube tightens the outer section of the rigid inner cannula from the radial direction; the bellows is covered with a C-shaped elastic inner buckle, and the cap of the nut cap The inner surface of the cover is tapered, and the C-shaped elastic inner buckle is located between the cap of the nut cap and the end face of the rigid joint body; the inner diameter of the C-shaped elastic inner buckle is larger than the outer diameter of the bellows in a natural state without external force; when When the C-shaped elastic inner buckle is squeezed into the tapered part of the nut cap by the end face of the rigid joint body, the outer diameter of the C-shaped elastic inner buckle is larger than the diameter of the hollow hole of the nut cap, and the inner diameter of the C-shaped elastic inner buckle is smaller than the corrugated The outer diameter of the pipe, and the inner edge of the C-shaped elastic inner buckle is embedded in the annular groove of the bellows.

Preferably, the inner end of the rigid inner insertion tube is fixedly fitted and inserted into the water passage hole of the rigid connector body.

Rigid inserts can be stainless steel tubing.

The soft water pipe can be a silicone pipe.

The C-shaped elastic inner buckle is formed with a taper matched with the inner surface of the cap of the nut cap.

The rigid connector body is generally arranged on the container wall of the water storage container. In this application document, the so-called outer section or end of the rigid inner cannula refers to the section or end of the rigid inner cannula that is away from the inner cavity of the water storage container. Conversely, the so-called inner section or end of the rigid inner insertion tube refers to the section or end of the rigid inner insertion tube that is close to the inner cavity of the water storage container. Similarly, the outer section of the rigid joint body also refers to the section of the rigid joint body away from the inner cavity of the water storage container, and the rigid joint body is exposed outside the water storage container.

Since the inner surface of the cap of the nut cap is formed with a taper, the diameter of the inner cavity of the nut cap is gradually reduced at the portion of the taper. The so-called constricted end of the tapered part of the nut cap refers to the end with a smaller diameter in the tapered part of the nut cap.

The inner edge of the so-called C-shaped elastic inner buckle refers to the edge near its center.

The utility model has the following advantages and effects:

1. The traditional quick-connect structure relies on the axial pressure on the rubber gasket to realize water sealing, while the utility model relies on the radial tightening force of the rigid inner cannula to achieve, and then brings the following advantages and effects:

1. No need to rely on rubber gaskets, avoiding the problem of water seepage after rubber gaskets are heated and aged, especially suitable for quick connection of hot water pipes;

2. There is no need to rely on axial pressure to achieve sealing, so the nut cap only needs to be tightened slightly, so that the nut cap can be tightened manually without tools, which is convenient to operate and will not be limited by the operating surface. Applied to equipment that can only tighten nuts manually;

3. The length of the line of defense against water seepage is long; the length of the line of defense for preventing water seepage of the utility model is equivalent to the axial length of the socket joint between the rigid inner cannula and the rubber hose, which can generally be as long as several centimeters. Within the range of the defense line of several centimeters, even if there are a few millimeters or several centimeters that cannot be completely impervious to seepage, as long as there is a section on the entire defense line that can effectively prevent seepage. In short, the length of the line of defense against water seepage of the utility model can be several centimeters long, while the traditional structure is only about 1 mm. The difficulty for leaking water to completely cross the line of defense of several centimeters in the utility model is obviously greater than that of the 1 mm long line of defense of the traditional structure. Difficulty; from another perspective, the possibility of complete loss of several centimeters of the defense line of the utility model is far lower than the possibility of complete loss of 1 millimeter of the traditional structure, so the reliability of the utility model's anti-seepage is high.

2. The utility model is firmly connected and easy to operate

When the nut cap is tightened, the C-shaped elastic inner buckle is squeezed and enters the constricted neck end of the taper part of the nut cap, so that the opening of the C-shaped elastic inner buckle shrinks, the inner diameter of the C-shaped elastic inner buckle becomes smaller, and then the C-shaped elastic inner buckle The inner edge of the buckle is forced to be embedded in the annular groove of the bellows tube wall, so the bellows cannot axially escape from the nut cap, which means that the axial relative position of the bellows and the nut is fixed. Once the bellows is fixed, The protected sebific tube that is enclosed within it will naturally not break away from the rigid inner cannula due to being pulled. Conversely, when the nut cap is unscrewed, the C-shaped elastic inner buckle moves away from the nut cap under the action of its own elasticity, that is, it moves to the expanding neck end of the taper part of the nut cap, so the C-shaped elastic inner buckle expands and recovers To the normal state, expand the opening of the C-shaped elastic inner buckle to the normal state, and the inner diameter of the C-shaped elastic inner buckle returns to the natural state, so the inner edge of the C-shaped elastic inner buckle escapes from the annular groove of the bellows wall, which means As the bellows can axially escape from the nut cap, the rubber tube inside can be pulled axially to pull out the rigid inner insertion tube to realize disassembly. When it needs to be reinstalled, just insert the rigid inner tube into the end of the rubber tube, and then tighten the nut cap. Because the rubber tube is elastic, the rigid inner tube can be moved or pulled out into the end of the rubber tube, and After insertion, it can naturally rely on radial tightening to achieve sealing, and the water seal between the rigid inner insertion tube and the rubber tube does not need to rely on the assistance of other components or external forces. Therefore, the utility model is very convenient to be disassembled and installed, without using tools, and the connection is fastened and firm.

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of a specific embodiment of the present invention.

Fig. 2 is a schematic diagram of the fixed connection of the rigid joint body and the rigid inner cannula in Fig. 1 .

Fig. 3 is a schematic diagram of the assembly relationship of the bellows, the soft water pipe, the nut cap, and the C-shaped elastic inner buckle in Fig. 1 .

Fig. 4 is a schematic structural view of the C-shaped elastic inner buckle in Fig. 3 .

Fig. 5 is a schematic structural diagram of the nut cap in Fig. 3 .

Fig. 6 is a schematic structural diagram of the bellows in Fig. 3 .

FIG. 7 is an exploded perspective view of the structure shown in FIG. 1 .

Fig. 8 is an enlarged schematic diagram of the partial state of E of the structure shown in Fig. 1 when the nut cap is not tightened.

FIG. 9 is a schematic view of the state of the structure shown in FIG. 8 after the nut cap is tightened.

Detailed ways

As shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 7, the quick connection structure between the soft water pipe and the rigid joint includes a soft water pipe 8 (silicone tube), a nut cap 1, a hollow rigid joint body 2, and the rigid joint body 2 forms a The water hole 21, the outer section of the rigid joint body 2 is formed with an external thread 22, and the nut cap 1 is formed with an internal thread 11 that cooperates with the rigid joint body. After normal assembly, the nut cap 1 is screwed outside the outer section 2 of the rigid joint body; The center of the cap of the nut cap 1 is provided with a hollow hole 12 for a soft water pipe to pass through; the water hole 21 of the rigid joint body 2 is fixed and tightly connected with a rigid inner insertion tube 5, the rigid inner insertion tube is a stainless steel tube, and the rigid inner insertion tube The inner end of 5 is fixedly fitted and inserted in the water hole 21 of the rigid joint body. An annular gap 23 is formed between the rigid inner intubation tube 5 and the outer section 25 of the rigid joint body; a bellows 6 is set outside the silicone tube 8, as shown in Figure 6, an annular groove 61 is formed on the surface of the bellows 6, and the corrugated The ends of the tube 6 and the silicone tube 8 are located in the annular gap 23; the outer section of the rigid inner tube 5 is movably inserted in the silicone tube 8 (because the silicone tube has elasticity, the rigid inner tube 5 can be movably inserted into the silicone tube , the silicone tube can also be pulled out freely), the silicone tube 8 tightens the outer section of the rigid inner intubation tube 5 radially to achieve a water seal; The inner surface of the cap is tapered (as shown in Figure 5 and A in Figure 8), and the C-shaped elastic inner buckle 4 is located between the cap of the nut cap 1 and the end face of the rigid joint body 2; the C-shaped elastic inner buckle 4 forms There is a taper that matches the inner surface of the cap of the nut cap (as shown in part B in Figure 4). The inner diameter m of the C-shaped elastic inner buckle 4 in the natural state without external force (as shown in Figure 4) is greater than the outer diameter n of the bellows (as shown in Figure 6); when the C-shaped elastic inner buckle 4 is rigidly connected When the end face of the body 2 squeezes into the constricted neck end of the tapered part of the nut cap, the inner diameter of the C-shaped elastic inner buckle becomes smaller, and is smaller than the outer diameter of the bellows 6, and the inner edge 41 of the C-shaped elastic inner buckle is embedded in the bellows. In the groove 61, but the outer diameter of the C-shaped elastic inner button 4 is still greater than the diameter of the cap hollow hole 12 of the nut cap.

The mode of operation and working principle of the foregoing embodiment are as follows:

In the normal state, the rigid joint body is fixedly installed on the wall of the water storage container, and the rigid joint body and the rigid inner insertion tube can be fixedly connected together, as shown in Figure 2, while the soft water pipe is connected with the bellows, the nut cap, and the C-shaped The elastic inner buckles are combined together, as shown in Figure 3.

When the soft water pipe 8 needs to communicate with the water storage container, put the end of the silicone tube 8 on the outside of the rigid inner tube 5, and tighten the nut cap 1 on the external thread of the outer section 25 of the rigid connector; after tightening, the C-shaped elastic inner The buckle 4 is squeezed and enters the constriction of the nut cap taper, so that the opening 42 of the C-shaped elastic inner buckle shrinks, the inner diameter m of the C-shaped elastic inner buckle becomes smaller, and then the inner edge 41 of the C-shaped elastic inner buckle is forced Embedded in the annular groove 61 of the bellows tube wall, so the bellows 6 cannot be released from the C-shaped elastic inner buckle (as shown in Figure 9), and the outer diameter of the C-shaped elastic inner buckle 4 is still larger than the hollowed out cap of the nut cap The diameter of the hole 12, that is, the C-shaped elastic inner buckle 4 is relatively fixed to the nut cap, so the bellows 6 cannot axially escape from the nut cap (as shown in Figure 9), which means that the bellows 6 is axially opposite to the nut cap 1 The position is fixed, once the corrugated tube 6 is fixed, the protected silicone tube 8 inside it will naturally not break away from the rigid inner insertion tube 5 due to being pulled, so that the flexible water tube and the rigid joint body can be quickly connected. connect.

When the flexible water pipe needs to be disassembled, the nut cap 1 can be unscrewed from the outer section 25 of the rigid joint. After unscrewing, the C-shaped elastic inner buckle 4 expands under its own elasticity and returns to the normal state, so that the C-shaped elastic inner buckle The opening 42 expands to the normal state, and the inner diameter m of the C-shaped elastic inner buckle returns to the natural state, so the inner edge 41 of the C-shaped elastic inner buckle escapes from the annular groove 61 on the wall of the bellows, which means that the bellows 6 can be removed from the When the nut cap 1 comes out axially (as shown in Figure 8), the silicone tube 8 inside can be pulled axially and pulled out of the rigid inner insertion tube 5, so as to realize the disassembly of the soft water pipe and the rigid joint body.

Claims (5)

1. A quick connection structure for a soft water pipe and a rigid joint, comprising a soft water pipe, a nut cap, a hollow rigid joint body, the rigid joint body is formed with water holes, the outer section of the rigid joint body is formed with external threads, and the nut cap is formed There is an internal thread matched with the rigid joint body, and the nut cap is screwed on the outer part of the rigid joint body; the center of the cap of the nut cap is provided with a hollow hole for the soft water pipe to pass through; it is characterized in that: the water hole is fixed and tightly connected with a rigid An inner cannula, an annular gap is formed between the rigid inner cannula and the outer section of the rigid joint body; the soft water hose is a rubber hose, and a bellows is set outside the rubber hose, and the ends of the bellows and the rubber hose are located in the annular gap The outer section of the rigid inner cannula is movably inserted into the rubber tube, and the rubber tube tightens the outer section of the rigid inner cannula radially; the bellows is covered with a C-shaped elastic inner buckle, and the inner surface of the nut cap forms a There is a taper, and the C-shaped elastic inner buckle is located between the cap of the nut cap and the end face of the rigid joint body; the inner diameter of the C-shaped elastic inner buckle is larger than the outer diameter of the bellows in a natural state without external force; when the C-shaped elastic inner buckle When the buckle is squeezed into the tapered part of the nut cap by the end face of the rigid joint body, the outer diameter of the C-shaped elastic inner buckle is larger than the diameter of the hollow hole of the nut cap, and the inner diameter of the C-shaped elastic inner buckle is smaller than the outer diameter of the bellows , and the inner edge of the C-shaped elastic inner buckle is embedded in the annular groove of the bellows. 2. The quick connection structure between the soft water pipe and the rigid joint according to claim 1, characterized in that: the inner end of the rigid inner insertion tube is fixedly fitted and inserted into the water passage hole of the rigid joint body. 3. The quick connection structure of soft water pipe and rigid joint according to claim 1 or 2, characterized in that: the rigid inner insert is a stainless steel pipe. 4. The quick connection structure between the soft water pipe and the rigid joint according to claim 1 or 2, characterized in that the soft water pipe is a silicone tube. 5. The quick connection structure between a flexible water pipe and a rigid joint according to claim 1 or 2, characterized in that: the C-shaped elastic inner buckle is formed with a taper that matches the inner surface of the cap of the nut cap.