Waterproof insulating joint

Abstract

The utility model discloses a waterproof insulating joint, which comprises a first connector, a second connector and an insulating connecting piece for connecting the first connector and the second connector, and the insulating connecting piece is provided with a first channel for conducting the first connector and the second connector. The first channel is internally provided with a one-way valve structure capable of limiting reverse flow of fluid, and the insulating connecting piece can limit direct passing of current, so that the occurrence of electric shock accidents is reduced, and the use safety is improved; a one-way valve structure capable of preventing fluid from flowing back is arranged in the first channel, and when the waterproof insulating joint is installed on the water heater, potential safety hazards or equipment damage caused by hot water flowing back can be avoided. When the waterproof insulating joint is mounted in front of or behind the gas meter, water can be prevented from flowing backwards into the gas pipe, so that water blockage in the gas pipe is avoided, and the water is also prevented from being mixed into the gas to influence the combustion efficiency of the gas and cause unstable flame or flameout.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of leakage protection fittings, and particularly relates to a waterproof insulation joint. BACKGROUND

[0002] In order to prevent the risk of electric shock caused by the flow of electric current along the connected metal pipe or the fluid in the pipe, a waterproof insulation joint is generally installed at the water outlet end of the water heater shell or in front of or behind the gas meter.

[0003] During use, hot water sometimes flows back into the cold water pipeline from the water heater, causing the hot water to mix with the cold water and change the water temperature, thereby exacerbating heat loss. Hot water backflow can also change the water pressure or damage the pipeline, causing the risk of electric shock. At the same time, it also reduces the service life of the water heater. Liquid backflow sometimes occurs in the gas pipeline network due to improper connection or other reasons. SUMMARY

[0004] The utility model overcomes the defects of the prior art and provides a waterproof insulation joint capable of limiting fluid backflow.

[0005] The utility model is implemented through the following technical solutions:

[0006] A waterproof insulation joint comprises a first connector, a second connector, and an insulation connecting piece connecting the first connector and the second connector, a first channel for conducting the first connector and the second connector is arranged on the insulation connecting piece, and a one-way valve structure capable of limiting fluid backflow is arranged in the first channel.

[0007] The one-way valve structure comprises a valve body connected to the inner wall of the first channel, a second channel for fluid to pass through is arranged on the valve body, and the one-way valve structure further comprises a plug capable of being pushed open by the forward flowing fluid and capable of being pushed to block the second channel by the reverse flowing fluid.

[0008] The back of the plug is provided with a guide column, a guide frame is connected to the valve body, and a guide hole for guiding the movement of the guide column is arranged on the guide frame.

[0009] The first channel inner wall is provided with a protrusion for the end of the valve body to abut against and limit the movement thereof, and the outer wall of the valve body or the guide frame is provided with an elastic block capable of abutting against the first channel inner wall to limit the withdrawal of the valve body from the first channel.

[0010] The waterproof and insulated joint as claimed in claim 1, wherein a first sealing ring is arranged between the valve body and the inner wall of the first channel, and a second sealing ring capable of forming a sealing connection with the plug is arranged at the port of the second channel.

[0011] The waterproof and insulated joint as claimed in claim 1, wherein the insulated connecting piece is made of an insulating material by injection molding or is made of an insulating ceramic.

[0012] The waterproof and insulated joint as claimed in claim 1, wherein the first connecting head is an internally threaded connecting head, and the second connecting head is an externally threaded connecting head.

[0013] The waterproof and insulated joint as claimed in claim 1, wherein the plug and the guide frame are arranged on the side of the valve body close to the first connecting head.

[0014] The waterproof and insulated joint as claimed in claim 1, wherein the plug and the guide frame are arranged on the side of the valve body close to the second connecting head.

[0015] The waterproof and insulated joint as claimed in claim 1, wherein when the insulated connecting piece is made of an insulating ceramic, first and second accommodating cavities for connecting the first and second connecting heads are arranged at the two ends of the insulated connecting piece, the first connecting head is in interference fit with the first accommodating cavity, the second connecting head is in interference fit with the second accommodating cavity, and the first accommodating cavity, the second accommodating cavity and the first channel are in communication.

[0016] Compared with the prior art, the waterproof and insulated joint has the following advantages:

[0017] 1. The insulated connecting piece can limit the direct passage of electric current, thereby reducing the occurrence of electric shock accidents and improving the safety of use; the first channel is internally provided with a one-way valve structure capable of preventing fluid backflow, so that when the waterproof and insulated joint is installed on a water heater, safety hazards or equipment damage caused by hot water backflow can be avoided; when the waterproof and insulated joint is installed in front of or behind a gas meter, water backflow into the gas pipe can be prevented, thereby avoiding water blockage in the gas pipe and water mixing into the gas, which in turn affects the combustion efficiency of the gas and causes unstable flame or flameout.

[0018] 2. The outer wall of the valve body or the guide frame is provided with an elastic block capable of abutting against the inner wall of the first channel, so that the one-way valve structure can be limited to exit the first channel by the elastic block, the stability of the structure is improved, and a longer service life is achieved.

[0019] 3. The first connecting head is an internally threaded connecting head, and the second connecting head is an externally threaded connecting head, so that the waterproof and insulated joint is convenient to connect with the connecting end on the water heater or the gas pipe. BRIEF DESCRIPTION OF DRAWINGS

[0020] The specific embodiments of the utility model will be further described in detail below with reference to the drawings, in which:

[0021] Figure 1 is a sectional view schematic diagram of the embodiment 1 in the utility model;

[0022] Figure 2 is a sectional view schematic diagram of the embodiment 2 in the utility model;

[0023] Figure 3 is a structure schematic diagram of the utility model;

[0024] Figure 4 is a sectional view schematic diagram of the insulation connecting piece in the utility model;

[0025] Figure 5 is a structure schematic diagram of the one-way valve structure in the utility model;

[0026] Figure 6 is an exploded schematic diagram of the one-way valve structure in the utility model;

[0027] Figure 7 is a structure schematic diagram of the first connecting head in the utility model;

[0028] Figure 8 is a structure schematic diagram of the second connecting head in the utility model. DETAILED DESCRIPTION

[0029] The utility model will be further described in connection with the drawings:

[0030] As Figures 1 to 8 shown, a waterproof insulation joint, including first connecting head 1, second connecting head 2 and the insulation connecting piece 3 of connecting first connecting head 1, second connecting head 2, be equipped with the first passageway 4 of first connecting head 1 and second connecting head 2 conduction on the insulation connecting piece 3, be equipped with the one-way valve structure 5 of being able to limit fluid counterflow in the first passageway 4.

[0031] The insulation connecting piece 3 in the case can limit the current directly through, thereby reduce the occurrence of electric shock accident, improve the security of use;The first passageway 4 is equipped with the one-way valve structure 5 of being able to prevent fluid counterflow inside, when the waterproof insulation joint is installed on the water heater, can avoid the security risk or equipment damage caused by hot water counterflow;When the waterproof insulation joint is installed in the front or back of gas meter, can prevent water from pouring into the gas pipe, thereby avoiding the water blockage in the gas pipe, also avoid water mixing into gas, further influence the combustion efficiency of gas, cause flame instability or flameout.

[0032] In some embodiments, the insulation connecting piece 3 is injection molded by insulating material, and the first connecting head 1, the second connecting head 2 and the insulation connecting piece 3 are injection molded together.

[0033] In some embodiments, the insulation ceramic is made. The two ends of the insulation connector 3 are provided with a first accommodating cavity 31 for connecting the first connector 1 and a second accommodating cavity 32 for connecting the second connector 2, the first connector 1 is interference fit with the first accommodating cavity 31, the second connector 2 is interference fit with the second accommodating cavity 32, the first accommodating cavity 31, the second accommodating cavity 32 and the first channel 4 are communicated. Wherein, the first connector 1 can be interference fit with the inner wall of the first accommodating cavity 31, of course, the first connector 1 can also be connected on the inner wall of the first accommodating cavity 31 by glue or other connecting structure. The second connector 2 can be interference fit with the inner wall of the second accommodating cavity 32, of course, the second connector 2 can also be connected on the inner wall of the second accommodating cavity 32 by glue or other connecting structure.

[0034] In an embodiment, the one-way valve structure 5 includes a valve body 51 connected to the inner wall of the first channel 4, the valve body 51 is provided with a second channel 52 for fluid to pass through, the one-way valve structure 5 further includes a plug 53 which can be pushed open by the forward flowing fluid and can be pushed to block the second channel 52 by the reverse flowing fluid.

[0035] Further, the back of the plug 53 is provided with a guide column 531, the valve body 51 is connected with a guide frame 54, the guide frame 54 is provided with a guide hole 541 for guiding the movement of the guide column 531. The guide column 531 moves along the guide hole 541 so that the movement of the plug 53 is more stable. Wherein, the plug 53 and the guide column 531 are integrated structure, the guide frame 54 is connected on the valve body 51 by buckle structure, of course, it can also be connected on the valve body 51 by thread connection or other connecting structure.

[0036] In an embodiment, the inner wall of the first channel 4 is provided with a protrusion 41 for the end of the valve body 51 to abut so as to limit its movement, the outer wall of the valve body 51 or the guide frame 54 is provided with a elastic block 542 which can abut on the inner wall of the first channel 4 so as to limit its exit from the first channel 4. The elastic block 542 can limit the one-way valve structure 5 from exiting the first channel 4, improve the stability of the structure, so as to have longer service life. Wherein, the elastic block 542 can be formed by bending the connecting block on the guide frame 54, of course, the elastic block 542 can be connected on the guide frame 54 by heat melting or threaded fastener.

[0037] In an embodiment, the valve body 51 and the inner wall of the first channel 4 are provided with a first sealing ring 61, the port of the second channel 52 is connected with a second sealing ring 62 which can form a sealed connection with the plug 53 so as to limit the water leakage of the valve body 5. Specifically, the outer wall of the valve body 51 is provided with a first recess 50 for installing the first sealing ring 61, the port of the second channel 52 is provided with a second recess 500 for installing the second sealing ring 62.

[0038] In one embodiment, the first connector 1 is an internally threaded connector, and the second connector 2 is an externally threaded connector. The plug 53 and the guide frame 54 are arranged on the side of the valve body 51 close to the first connector 1. That is, when the connection end on the water heater or gas pipe is externally threaded, the first connector 1 is connected to the connection end on the water heater or gas pipe as the input end of the waterproof and insulated connector.

[0039] In another embodiment, the plug 53 and the guide frame 54 are arranged on the side of the valve body 51 close to the second connector 2. That is, when the connection end on the water heater or gas pipe is internally threaded, the second connector 2 is connected to the connection end on the water heater or gas pipe as the input end of the waterproof and insulated connector.

Claims

1. A waterproof insulated joint, characterized by: The utility model provides a kind of connecting piece, including first connector (1), second connector (2) and the insulation connecting piece (3) connecting first connector (1), second connector (2), the insulation connecting piece (3) is equipped with the first channel (4) of first connector (1) and second connector (2) conduction, the first channel (4) is equipped with the one-way valve structure (5) that can limit fluid backflow in it; The one-way valve structure (5) includes a valve body (51) connected to the inner wall of the first channel (4), the valve body (51) is provided with a second channel (52) for fluid to pass through, and the one-way valve structure (5) further includes a plug (53) that can be pushed open by the forward flowing fluid and blocked by the reverse flowing fluid. The back of the plug (53) is provided with a guide column (531), and the valve body (51) is connected with a guide frame (54), and the guide frame (54) is provided with a guide hole (541) for guiding the movement of the guide column (531); The inner wall of the first channel (4) is provided with a protrusion (41) for the end of the valve body (51) to abut against and limit its movement, and the outer wall of the valve body (51) or the guide frame (54) is provided with an elastic block (542) that can abut against the inner wall of the first channel (4) to limit its exit from the first channel (4); The insulation connecting piece (3) is made of insulating ceramic.

2. A waterproof insulated joint according to claim 1, characterized in that: The valve body (51) and the inner wall of the first channel (4) are provided with a first sealing ring (61), and the port of the second channel (52) is connected with a second sealing ring (62) that can form a sealed connection with the plug (53).

3. A waterproof insulated joint according to claim 1, characterized in that: The first connector (1) is an internally threaded connector, and the second connector (2) is an externally threaded connector.

4. A waterproof insulated joint according to claim 3, characterised in that: The plug (53) and the guide frame (54) are located on the side of the valve body (51) close to the first connector (1).

5. A waterproof insulated joint according to claim 3, characterized in that: The plug (53) and the guide frame (54) are located on the side of the valve body (51) close to the second connector (2).

6. A waterproof insulated joint according to claim 1, characterized in that: When the insulation connecting piece (3) is made of insulating ceramic, the two ends of the insulation connecting piece (3) are provided with a first accommodating cavity (31) for connecting the first connector (1) and a second accommodating cavity (32) for connecting the second connector (2), the first connector (1) is in interference fit with the first accommodating cavity (31), the second connector (2) is in interference fit with the second accommodating cavity (32), and the first accommodating cavity (31), the second accommodating cavity (32), and the first channel (4) are in communication.

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