CN108240514A - The fast-assembling jointing of transmission line forest fire water for fire extinguishing band - Google Patents

Abstract

A quick-fit connection joint for a water belt for mountain fire extinguishing on a power transmission line, comprising a male joint connected to a first water belt and a female joint connected to a second water belt, and the male joint includes a male connector connected to the end of the first water belt The body, the male body is sleeved with a rotatable threaded connection sleeve, the threaded connection sleeve has a threaded hole, the female joint includes a female body connected to the end of the second hose, and the female body has a threaded connection sleeve. The threaded connection part of the threaded hole, the female head body has a first through hole communicating with the second hose, the male head body has an insertion part inserted into the first through hole along the axis direction of the threaded hole and communicates with the first through hole and the second through hole of the first hose, a sealing assembly for sealing the gap between the plug part and the first through hole is installed on the plug part. The quick-fit connection joint has the advantages of simple structure, easy manufacture, convenient and fast connection, stable and reliable connection, and the like.

Description

Quick-fit connectors for water belts for mountain fire extinguishing on power transmission lines

technical field

The invention relates to the technical field of power transmission and distribution equipment, in particular to a quick-fit connector for a water belt for mountain fire extinguishing on power transmission lines.

Background technique

Due to the influence of fire customs in production and life, such as burning wasteland and going to graves, large-scale mountain fires are prone to occur in transmission line corridors, causing multiple lines to trip at the same time and power outages, and even cause power grid collapse. Mountain fires have become a serious threat to the safe operation of large power grids and society. Hotspot issue with normal power supply.

At present, our country has carried out a lot of research on the fire extinguishing of transmission lines, including the development of a long-distance high-lift mobile fire extinguishing platform, which is equipped with wear-resistant, high-temperature and high-pressure fire hoses, and the water delivery head can reach 500 meters. Up to 3,000 meters, providing effective fire extinguishing equipment for the transmission line mountain fire scene with high mountains and dangerous roads and lack of water on site. However, because the fire hose needs to withstand the pressure loss of atomization and long-distance transmission, its working pressure is as high as 8MPa, the wall thickness of the fire hose and the number of layers of braid are relatively large, and the weight of the fire hose per unit length reaches 0.3kg/m , in order to prevent each fire hose from being too heavy to affect the field use and handling, the length of a single fire hose generally does not exceed 20 meters. When connecting a 3000-meter fire hose on site, more than 150 joints need to be connected . At present, fire hoses used to extinguish mountain fires on power transmission lines are connected by ordinary threaded joints. In the field application process, there are problems such as cumbersome connection operations, long time required, and easy slippage after being tightened many times with adjustable wrench. Therefore, there is an urgent need to carry out research on quick-connect joints for fire extinguishing of transmission lines to reduce the time for connecting fire hoses and improve the efficiency of on-site transmission line fire disposal.

At present, the existing spool body joints are only suitable for the fixed conditions of the pipeline, because the pipeline needs to be recycled after the mountain fire disposal of the power transmission line. A new type of fire hose quick connector structure has been proposed at home and abroad, such as "a super high pressure quick connector assembly" in patent CN200720045320.4. There are spool components in the cavities of the replacement positioning sleeve, the joint main body and the joint auxiliary body. The spool components include a spool, a pressure-relieving spring seat, a sealing ring and a retaining ring. The spool is provided with multiple A pressure relief through hole, the center line of each pressure relief through hole is parallel to the axis of the joint body. Although this product can realize quick connection and quick disconnection, it can only be operated under the condition that both the female joint and the male joint have no pressure, which limits the use occasions of the quick joint. CN102705618B discloses a quick joint operated under high pressure using the pressure difference between the joints, which consists of a housing, an outer ring, a valve seat, an intermediate body, a joint body and a sealing device. The outer wall of the valve seat is slidingly connected with the inner casing of the valve seat sliding sleeve, and the outer wall is provided with a positioning groove, and one end of the valve seat in the axial direction passes through the retaining ring for the hole and the retaining ring groove on the inner cavity of the valve seat sliding sleeve. Limiting connection, the middle of this end is provided with a spool sleeve and the mandrel shaft of the conical spool body is slidingly connected and limited by the end face of the barrel mouth, a spool spring is provided between the spool sleeve and the conical spool body, and the valve The other axial end of the seat is connected with the inner wall of the shoulder on the inner cavity of the sliding sleeve of the valve seat through the seat spring, and the valve seat is provided with a fluid channel. The above-mentioned quick connectors all have the functions of quick insertion and removal, one-way sealing, and non-return function. However, for long-distance high-lift mobile fire extinguishing platforms, such quick connectors have complex structures and high processing costs. In addition, due to the lack of water resources at the scene of field transmission lines and mountain fires, it is necessary to have a recovery function, and the one-way seal hinders the recovery of water agents, so it is not applicable on site.

To sum up, there are the following problems when the existing connecting joints are directly applied to the field application of transmission line mountain fires:

1) The pressure of the mountain fire extinguishing device on the transmission line reaches above 15MPa, and the pressure bearing capacity and rapidity of ordinary joints cannot be balanced;

2) The quick connector installs the processed valve core in the valve body, which has a complex structure and high cost, and is difficult to apply in the field where the fire extinguishing agent needs to be recycled, which makes the platform unable to deal with multiple mountain fires during the period of high mountain fires;

3) The plug-in quick connector may be easily tripped by obstacles such as tree stumps and stones in the field, resulting in failure to extinguish the fire and posing a safety risk to personnel. There is no way to protect the connector by using the pressure difference.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, and provide a quick-installed connection joint for the mountain fire fire extinguishing hose of transmission lines with simple structure, easy manufacture, convenient and fast connection, and stable and reliable connection.

In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions:

A quick-fit connection joint for a water belt for mountain fire extinguishing on a power transmission line, comprising a male joint connected to a first water belt and a female joint connected to a second water belt, and the male joint includes a joint connected to the end of the first water belt A male body, the male body is sleeved with a rotatable threaded connection sleeve, the threaded connection sleeve has a threaded hole, the female joint includes a female body connected to the end of the second hose, the female The head body has a threaded portion for threaded connection with the threaded hole of the threaded sleeve, the female head body has a first through hole communicating with the second hose, and the male head body has a first through hole inserted along the axis of the threaded hole. An inserting part in the through hole and a second through hole communicating with the first through hole and the first hose, a sealing assembly for sealing the gap between the inserting part and the first through hole is installed on the inserting part.

In the above-mentioned quick-fit connection joint, preferably, the first through hole has a tapered hole section, the cross-sectional area of the tapered hole section increases gradually along the direction away from the second hose, and the insertion part has a The tapered section is a tapered section in close contact with the inner wall around the tapered hole section, and the cone angle of the tapered section is smaller than that of the tapered hole section.

In the above-mentioned quick-fit connection joint, preferably, the end of the first through hole away from the second hose has a cylindrical positioning section, and the insertion part has a cylindrical positioning section inserted into the cylindrical positioning section and slidingly fitted with the cylindrical positioning section. department.

In the above-mentioned quick-fit connector, preferably, the axis of the tapered hole section, the axis of the tapered section and the axis of the threaded hole coincide.

In the above-mentioned quick-fit connection joint, preferably, the sealing assembly includes more than two first sealing rings that are pressed between the insertion part and the first through hole, and more than two first sealing rings are inserted into the first through hole along the insertion part. The directions of the through holes are sequentially arranged at intervals.

For the above-mentioned quick-fit connector, preferably, an annular groove is provided on the insertion part corresponding to each first sealing ring, and the first sealing ring is tightly sleeved in the corresponding annular groove.

In the above-mentioned quick-fit connection joint, preferably, the male body also has an annular docking portion that is docked with the female body at the end of the first through hole, and a second joint is pressed between the annular docking portion and the female body. sealing ring.

For the above-mentioned quick-fit connection joint, preferably, the male body has a first insertion rod part, the first hose is sheathed on the first insertion rod part, and the first hose is sheathed with a second A first compression sleeve that is pressed and fixed by a hose; the female head body has a second insertion rod part, the second hose is sleeved on the second insertion rod part, and the second hose is sleeved on the outside A second compression sleeve for compressing and fixing the second hose is provided.

In the above-mentioned quick-fit connection joint, preferably, the outer surfaces of the first inserting rod part and the second inserting rod part are both cylindrical surfaces.

Compared with the prior art, the present invention has the advantage that: when connecting the quick-fit connection joint of the power transmission line mountain fire fire extinguishing hose of the present invention, insert the socket part of the male body into the first through hole of the female body , and then turn the threaded connection sleeve to be threadedly connected to the threaded part of the female head body. Its structure is simple, easy to manufacture, convenient and fast to connect, and the connection is stable and reliable; When the pressure fire extinguishing agent is filled in the belt and the second water belt, the pressure of the fire extinguishing agent will cause the male body and the female body to form a reverse tension, which will increase the tension between the threaded connection sleeve and the screw joint, so that It is difficult to rotate relative to the threaded connection sleeve and the threaded part. When dragging the fire hose in the field, it can avoid the problem of loose connection between the male body and the female body caused by obstacles such as bayonets, stones, and tree stumps. In addition, the quick-fit connection joint has no valve core structure, which can meet the recovery requirements of the fire extinguishing agent, and is beneficial to improve the utilization rate of the fire extinguishing agent.

Description of drawings

Fig. 1 is a partial cross-sectional structural schematic diagram of a male joint.

Fig. 2 is a partial cross-sectional structural schematic diagram of a female joint.

illustration:

1. Male connector; 11. Male body; 12. Threaded connection sleeve; 121. Threaded hole; 13. Insertion part; 131. Conical section; 132. Cylindrical positioning part; 1. Inserting rod part; 16. First compression sleeve; 2. Female joint; 21. Female head body; 22. Screw connection part; 23. First through hole; 231. Tapered hole section; 232. Cylindrical positioning section; 24. The second rod part; 25. The second compression sleeve; 3. The first sealing ring; 100. The first hose; 200. The second hose.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Fig. 1 and Fig. 2, the quick-fit connection joint of the water belt for mountain fire extinguishing of the power transmission line in this embodiment includes a male joint 1 connected with the first water belt 100 and a female joint 2 connected with the second water belt 200 , the male joint 1 includes a male body 11 connected to the end of the first hose 100, the male body 11 is sleeved with a rotatable threaded connection sleeve 12, the threaded connection sleeve 12 has a threaded hole 121, and the female joint 2 includes a connection The female head body 21 at the end of the second water belt 200 has a screw connection part 22 for threaded connection with the threaded hole 121 of the threaded sleeve 12, and the female head body 21 has a connection with the second water belt 200. The first through hole 23, the male head body 11 has the insertion part 13 inserted into the first through hole 23 along the axial direction of the threaded hole 121 and the second through hole 14 communicating with the first through hole 23 and the first hose 100, A sealing assembly for sealing the gap between the inserting portion 13 and the first through hole 23 is installed on the inserting portion 13 . When connecting the quick-fit connector of the power transmission line mountain fire fire extinguishing hose, insert the socket 13 of the male body 11 into the first through hole 23 of the female body 21, and then turn the threaded connection sleeve 12 and the female body The screw connection part 22 of 21 can be threaded, and its structure is simple, easy to manufacture, convenient and quick to connect, and the connection is stable and reliable; and the threaded connection sleeve 12 is screwed to the screw connection part 22, when the first water belt 100 and the second water belt 100 When the belt 200 is filled with a pressure fire extinguishing agent, the pressure of the fire extinguishing agent will cause the male body 11 and the female body 21 to form a reverse tension, which will increase the tension between the threaded connection sleeve 12 and the screw connection part 22, so that It is difficult to relatively rotate between the threaded connection sleeve 12 and the threaded part 22. When dragging the fire hose in the field, it can avoid obstacles such as bayonets, stones and tree stumps that cause the male body 11 and the female body 21 to be loosely connected. Even the problem of failure; in addition, the quick-connect joint has no valve core structure, which can meet the recovery requirements of the fire extinguishing agent, and is beneficial to improve the utilization rate of the fire extinguishing agent.

In this embodiment, the first through hole 23 has a tapered hole section 231 , the cross-sectional area of the tapered hole section 231 gradually increases along the direction away from the second hose 200 , and the insertion part 13 has an inner wall that is consistent with the tapered hole section 231 The tapered section 131 is in close contact, and the taper angle of the tapered section 131 is smaller than the taper angle of the tapered hole section 231 . The close contact and fit between the tapered section 131 and the tapered hole section 231 can form a sealing effect on the gap between the insertion part 13 and the first through hole 23 , which can further improve the sealing effect. And the taper angle of the tapered section 131 is smaller than the taper of the tapered hole section 231. When the threaded connection sleeve 12 is threadedly connected with the threaded part 22 of the female body 21, the male body 11 and the female body 21 can be forced to move along the axis of the threaded hole 121. The directions are close to each other, so that the tapered section 131 and the tapered hole section 231 are pressed against each other, so that the tapered section 131 and the tapered hole section 231 are closely connected with the annular contact line, which can ensure the sealing performance and reduce the processing and assembly accuracy and cost of production. Preferably, the taper angle of the tapered section 131 is 10°, and the taper angle of the tapered hole section 231 is 12°. The axis of the tapered hole section 231, the axis of the tapered section 131 and the axis of the threaded hole 121 coincide, which can ensure the uniformity of the contact force between the outer wall around the tapered section 131 and the inner wall around the tapered hole section 231, so as to avoid deformation and make the cone The shape section 131 and the tapered hole section 231 maintain the coaxial function, which is beneficial to improve the sealing performance.

In this embodiment, the end of the first through hole 23 away from the second hose 200 has a cylindrical positioning section 232 , and the socket part 13 has a cylindrical positioning section 132 inserted into the cylindrical positioning section 232 and slidingly fitted with the cylindrical positioning section 232 . The cylindrical positioning part 132 is inserted into the cylindrical positioning section 232 to form a positioning function, which can limit the degrees of freedom of the male body 11 and the female body 21 except for sliding along the insertion direction, and ensure the stability and reliability of the connection between the male connector 1 and the female connector 2 .

In this embodiment, the sealing assembly includes two first sealing rings 3 that are pressed between the insertion portion 13 and the first through hole 23 , and the two first sealing rings 3 are inserted into the first through hole 23 along the insertion portion 13 The two first sealing rings 3 form a double seal, the sealing effect is good, and the sealing assembly has a simple structure and low cost.

In this embodiment, an annular groove is provided on the socket part 13 corresponding to each first sealing ring 3 , and the first sealing ring 3 is tightly sleeved in the corresponding annular groove. The sealing ring 3 forms a positioning function, so that the first sealing ring 3 is stably and more reliably connected to the insertion part 13, not only when the insertion part 13 is inserted into the first through hole 23, it is not necessary to operate and position the first sealing ring 3, And it can ensure that the first sealing ring 3 is at the set position after the male joint 1 and the female joint 2 are connected, thereby ensuring the sealing effect.

In this embodiment, the male body 11 also has an annular butt joint with the female body 21 at the end of the first through hole 23, and a second sealing ring is pressed between the annular butt joint and the female body 21 for screw connection. When the sleeve 12 is threadedly connected with the threaded part 22 of the female body 21, the male body 11 and the female body 21 can be forced to approach each other along the axis direction of the threaded hole 121, so that the annular butt joint and the female body 21 are pressed against each other for a second time. A sealing ring, the second sealing ring has the effect of further strengthening the sealing.

In this embodiment, the male head body 11 has a first inserting rod portion 15, the first hose 100 is sheathed on the first inserting rod portion 15, and the first hose 100 is sheathed outside to compress the first hose 100. The fixed first compression sleeve 16; the female head body 21 has a second insertion rod part 24, and the second water belt 200 is sleeved on the second insertion rod part 24, and the second water belt 200 is sleeved with the second The hose 200 compresses the fixed second compression sleeve 25 . A crimping machine can be used to buckle the first compression sleeve 16 on the first insertion rod part 15, and buckle the second compression sleeve 25 on the second insertion rod part 24, so that the first hose 100 and the second insertion rod part 24 can be pressed together. The first rod part 15 is sealed and connected, and the second hose 200 is connected with the second rod part 24 in a sealed manner. Both crimping machine and crimping method are prior art.

In this embodiment, the outer surfaces of the first inserting rod part 15 and the second inserting rod part 24 are both cylindrical surfaces, which is beneficial to ensure sealing and service life.

In this embodiment, the first water belt 100 and the second water belt 200 adopt the existing wear-resistant, high-temperature and high-pressure water delivery pipes. Both the male joint 1 and the female joint 2 are made of copper material to reduce the corrosion effect of the salt fire extinguishing agent on the quick joint. The quick-fit connection joint of this embodiment has been verified by actual use, and its pressure bearing capacity can reach 25Mpa, and it has been used for more than 1,000 on-site fire extinguishing at a maximum output pressure of 15Mpa, without water leakage and connection failure, fully meeting the needs of on-site applications.

The above descriptions are only preferred implementations of the present invention, and the scope of protection of the present invention is not limited to the above examples. For those skilled in the art, improvements and transformations obtained without departing from the technical concept of the present invention should also be regarded as the protection scope of the present invention.

Claims (9)

1. A quick-fit connection connector for a water hose for mountain fire extinguishing on transmission lines, including a male connector (1) connected to the first hose (100) and a female connector (2) connected to the second hose (200), It is characterized in that: the male joint (1) includes a male body (11) connected to the end of the first hose (100), and a rotatable threaded connection sleeve (11) is sleeved on the male body (11) 12), the threaded connection sleeve (12) has a threaded hole (121), the female joint (2) includes a female body (21) connected to the end of the second hose (200), the female body (21) has a threaded connection part (22) for threaded connection with the threaded hole (121) of the threaded connection sleeve (12), and the female head body (21) has a first A through hole (23), the male head body (11) has an insertion part (13) inserted into the first through hole (23) along the axial direction of the threaded hole (121) and communicates with the first through hole (23) and the second through hole. A second through hole (14) of a hose (100), a sealing assembly for sealing the gap between the insertion part (13) and the first through hole (23) is installed on the insertion part (13). 2. The quick-fit connection joint according to claim 1, characterized in that: the first through hole (23) has a tapered hole section (231), and the cross-sectional area of the tapered hole section (231) is The direction of the second hose (200) gradually increases, and the insertion part (13) has a tapered section (131) that is in close contact with the inner wall around the tapered hole section (231), and the tapered section (131 ) is smaller than the cone angle of the tapered hole section (231). 3. The quick-fit connection joint according to claim 2, characterized in that: the end of the first through hole (23) away from the second hose (200) has a cylindrical positioning section (232), and the insertion part (13) A cylinder positioning part (132) is inserted into the cylinder positioning section (232) and slidably fitted with the cylinder positioning section (232). 4. The quick-fit connection joint according to claim 2, characterized in that: the axis of the tapered hole section (231), the axis of the tapered section (131) and the axis of the threaded hole (121) coincide . 5. The quick-fit connection joint according to claim 1, characterized in that: the sealing assembly includes more than two first sealing rings pressed between the insertion part (13) and the first through hole (23) (3), two or more first sealing rings (3) are sequentially arranged at intervals along the direction in which the insertion portion (13) is inserted into the first through hole (23). 6. The quick-fit connection joint according to claim 5, characterized in that: the insertion part (13) is provided with a ring-shaped groove corresponding to each first sealing ring (3), and the first sealing ring (3) The clamping sleeve is set in the corresponding ring groove. 7. The quick-fit connector according to claim 5, characterized in that: the male body (11) also has an annular butt joint with the female body (21) at the end of the first through hole (23) , a second sealing ring is pressed between the annular joint portion and the female body (21). 8. The quick-fit connection joint according to any one of claims 1 to 7, characterized in that: the male body (11) has a first insertion rod portion (15), and the first hose (100 ) is sleeved on the first inserting rod part (15), and the first compression sleeve (16) is sleeved on the outside of the first hose (100) to compress and fix the first hose (100); The female head body (21) has a second insertion rod part (24), the second water belt (200) is sheathed on the second insertion rod part (24), and the second water belt (200) is sleeved on the outside A second compression sleeve (25) is provided to compress and fix the second hose (200). 9. The quick-fit connection joint according to claim 8, characterized in that: the outer surfaces of the first rod insertion part (15) and the second rod insertion part (24) are both cylindrical surfaces.