CN211561682U

CN211561682U - Fire hose interface

Info

Publication number: CN211561682U
Application number: CN201921993521.6U
Authority: CN
Inventors: 李同亚; 成建亭; 严士刚; 崔庆华; 崔广伟; 李云昌; 吕洪强
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2020-09-25
Anticipated expiration: 2029-11-18

Abstract

The utility model relates to a fire hose interface, including male joint and the female joint of pegging graft each other, the female joint includes first body, sets up at first body front end and along first body axial first joint portion and the second joint portion of arranging in proper order, first joint position is in between second joint portion and the first body, and first joint portion internal diameter is less than second joint portion internal diameter, male joint and first joint portion or second joint portion joint. The utility model discloses a set up the different first joint portion of internal diameter and second joint portion on a female joint for dock the male joint of two kinds of different specifications respectively, thereby eliminate the technical problem that different specifications are public, female joint can't dock.

Description

Fire hose interface

The technical field is as follows:

the utility model relates to a fire hose interface.

Background art:

the fire hose interface comprises male joint and female joint, and female joint usually connects on water supply pipe or fire engine water tank, and male joint connects on the water hose, and male joint makes the fire hose be connected with water supply pipe or fire engine water tank with the female joint butt joint to remote water delivery is convenient for.

In order to save water, fire hoses are designed to have multiple specifications, and fire hoses with different calibers are selected according to different fires, for example, domestic fire hoses have two specifications of 65mm and 80mm in diameter, so fire hose interfaces of 65 and 80 also exist, although the multi-specification fire hoses have a remarkable effect in the aspect of water saving, the complexity of butt joint of the fire hose interfaces is increased due to the fact that the fire hose interfaces of the two specifications cannot be matched, and if the fire hoses are selected mistakenly at a critical moment, the situation that a male joint and a female joint cannot be in butt joint is caused, and finally the fire extinguishing time is missed.

The utility model has the following contents:

the utility model discloses the technical problem that will solve is: the female joint of the fire hose connector can be butted with male joints of various specifications, and the technical problem that the male and female joints of different specifications cannot be butted is practically solved.

In order to solve the technical problem, the utility model discloses a technical scheme is: the fire hose interface comprises a male connector and a female connector which are mutually inserted, wherein the female connector comprises a first pipe body, a first clamping portion and a second clamping portion, the first clamping portion and the second clamping portion are arranged at the front end of the first pipe body in sequence along the axial direction of the first pipe body, the first clamping portion is located between the second clamping portion and the first pipe body, the inner diameter of the first clamping portion is smaller than that of the second clamping portion, and the male connector is clamped with the first clamping portion or the second clamping portion.

As a preferred scheme, the first clamping part comprises a first positioning pipe and a first clamping pipe which are coaxially connected to the front end of a first pipe body in sequence, the inner diameter of the first positioning pipe is larger than that of the first pipe body, the inner diameter of the first clamping pipe is larger than that of the first positioning pipe, a first check ring is inserted in the first clamping pipe, the section of the first check ring is in an L shape and is formed by connecting a tubular first check pipe and a flaky first check ring, one end of the first check pipe is connected to the inner hole of the first check ring, the other end of the first check pipe is abutted to the front end face of the first positioning pipe, the outer edge of the first check ring is abutted to the inner wall of the first clamping pipe, the first check ring and the first clamping pipe form an annular first installation cavity, a plurality of first tongue openings communicated with the first installation cavity are uniformly distributed on the first check pipe in the circumferential direction, first spring tongues which correspond to the first tongue openings one by one are elastically connected in the first installation cavity, and the head of any first spring bolt extends out to correspond to the first tongue openings under the action of elasticity and can be clamped and can extend and extend along the first;

the second clamping part comprises a tubular connecting seat screwed on the outer wall of the front end of the first tube body, an annular baffle plate is arranged on the inner wall of the connecting seat, the baffle plate is parallel and opposite to a first baffle ring of the first baffle ring and used for preventing the first baffle ring from being separated from the first clamping tube, the diameter of an inner hole of the baffle plate is not smaller than the inner diameter of the first positioning tube, a transparent cover is connected at the front end of the connecting seat, a second baffle ring is clamped between the transparent cover and the connecting seat, the second baffle ring is formed by connecting a tubular second baffle tube and a flaky second baffle ring, one end of the second baffle tube is connected on the inner hole of the second baffle ring, the other end of the second baffle tube is abutted against the end face of the front end of the connecting seat, the outer edge of the second baffle ring is abutted against the inner side wall of the transparent cover, the second baffle ring, the transparent cover and the front end face of the connecting seat jointly form an annular second mounting cavity, and a plurality of second tongue, the second mounting cavity is elastically connected with second lock tongues which correspond to the second tongue openings one by one, and the head of any second lock tongue extends out of the corresponding second tongue opening under the action of elastic force and can stretch out and retract along the radial direction of the second retaining ring;

the male joint comprises a second pipe body, a locking release sleeve and a pressing plate, wherein the locking release sleeve is sleeved on the outer wall of the second pipe body, the outer wall of the rear end of the second pipe body radially and outwards extends to form a clamping convex ring, the clamping convex ring is matched with a first positioning pipe or matched with a connecting seat at the front part of a baffle, the outer diameter of the locking release sleeve is consistent with that of the clamping convex ring, and the pressing plate is connected to one end, away from the locking release sleeve, of the clamping convex ring.

As a preferred scheme, a first annular sealing groove is formed in the inner wall of the first positioning pipe, a first sealing ring is embedded in the first annular sealing groove, a second annular sealing groove is formed in the inner wall of the connecting seat in front of the baffle, and a second sealing ring is embedded in the second annular sealing groove.

As an optimal scheme, the male joint is connected with the first clamping portion in a clamped mode, the length of the clamping convex ring is not larger than that of the first positioning pipe, the inner diameter of the front end of the male joint is smaller than that of the first positioning pipe, the inner diameter of the rear end of the male joint is equal to that of the first positioning pipe, the inner diameter of the baffle is equal to that of the first positioning pipe, and the first sealing ring is connected with the outer wall of the clamping convex ring in a clamped mode.

As a preferred scheme, male joint and second joint portion joint, the length of joint bulge loop is not more than the length of the connecting seat in baffle the place ahead, the internal diameter of male joint equals with the internal diameter of first body.

As a preferred scheme, the first spring bolt and the second spring bolt are both arc-shaped, the sections of the first spring bolt and the second spring bolt are both wedge-shaped, the inclined surfaces of the first spring bolt and the second spring bolt face the front of the first pipe body, the part of any first spring bolt, which is positioned in the first mounting cavity, is connected with a plate spring, the plate spring is arranged along the tangential direction of the first blocking pipe and clamped between the outer wall of the first blocking pipe and the inner wall of the first clamping pipe, and when the first spring bolt is retracted into the first mounting cavity, elastic potential energy is generated corresponding to the bending of the plate spring; the part of any second spring bolt in the second installation cavity is also connected with a plate spring, the plate spring is arranged along the tangential direction of the second blocking pipe, the plate spring is clamped between the outer wall of the second blocking pipe and the inner wall of the transparent cover, and when the second spring bolt retracts into the second installation cavity, the plate spring generates elastic potential energy corresponding to the bending of the plate spring

As a preferable scheme, a plastic sheath is sleeved on the outer wall of the transparent cover.

The utility model has the advantages that: the utility model discloses a set up the different first joint portion of internal diameter and second joint portion on a female joint for dock the male joint of two kinds of different specifications respectively, thereby eliminate the technical problem that different specifications are public, female joint can't dock.

The invention further adopts the first spring bolt and the second spring bolt to clamp the clamping convex ring on the male connector and adopts the unlocking sleeve to unlock, so that the male connector and the female connector can be quickly installed and separated, and the use is more convenient.

According to the invention, the first sealing ring and the second sealing ring are respectively arranged in the first clamping part and the second clamping part, so that the sealing effect when the male joint is in butt joint with the female joint is enhanced, and the water pressure of the fire hose is ensured.

The invention further adopts the plate spring to position the first bolt and the second bolt, so that the structure is simpler and more stable, and the assembly is more convenient.

The outer wall of the transparent cover is further sleeved with a plastic sheath so as to be convenient to grab, and meanwhile, the transparent cover is protected to avoid being broken by being hit by the male connector.

Description of the drawings:

the following detailed description of embodiments of the present invention is provided with reference to the accompanying drawings, in which:

fig. 1 is a schematic structural view of the male connector and the female connector of the present invention in a separated state;

FIG. 2 is a sectional view A-A of FIG. 1;

FIG. 3 is a schematic view of the installation structure of the male connector engaged with the first engaging portion of the female connector;

fig. 4 is a schematic view of the mounting structure of the male connector in engagement with the second engagement portion of the female connector.

In fig. 1 to 4: 100. the male connector, 200, the female connector, 1, a first pipe body, 2, a first clamping portion, 201, a first positioning pipe, 202, a first clamping pipe, 203, a first retainer ring, 2031, a first blocking pipe, 2032, a first blocking ring, 204, a first installation cavity, 205, a first tongue opening, 206, a first bolt, 3, a second clamping portion, 301, a connecting seat, 302, a baffle plate, 303, a transparent cover, 304, a second retainer ring, 3041, a second blocking pipe, 3042, a second blocking ring, 305, a second installation cavity, 306, a second tongue opening, 307, a second bolt, 4, a second pipe body, 5, a unlocking sleeve, 6, a pressure plate, 7, a clamping convex ring, 8, a first annular sealing ring, 9, a first sealing ring, 10, a second annular sealing groove, 11, a second sealing ring, 12, a plate spring, 13, a plastic sheath, 14, and a taper hole section.

The specific implementation mode is as follows:

the following describes in detail a specific embodiment of the present invention with reference to the drawings.

For convenience of description, in the specific embodiment, the front end is the right end in fig. 1, and the rear end is the left end in fig. 1.

The fire hose interface shown in fig. 1 to 4 includes a male connector 100 and a female connector 200 which are inserted into each other, where the female connector 200 includes a first pipe body 1, a first clamping portion 2 and a second clamping portion 3 which are arranged at the front end of the first pipe body 1 and arranged in sequence along the axial direction of the first pipe body 1, the first clamping portion 2 is located between the second clamping portion 3 and the first pipe body 1, the inner diameter of the first clamping portion 2 is smaller than the inner diameter of the second clamping portion 3, and the male connector 100 is clamped with the first clamping portion 2 or the second clamping portion 3.

In practical use, the male connector 100 is divided into two specifications, and the two specifications are respectively matched with the first clamping portion 2 and the second clamping portion 3 of the female connector 200, the male connectors 100 of the two specifications are respectively connected to water hoses matched with each other, as long as the water hoses of different specifications are selected according to the fire, and then the male connector 100 is butted to the female connector 200, and no matter which specification the male connector 100 is, the male connector 100 can be butted to the female connector 200, and only the difference that the male connector is butted to the first clamping portion 2 or the second clamping portion 3 is selected.

The first clamping part 2 comprises a first positioning pipe 201 and a first clamping pipe 202 which are coaxially connected at the front end of a first pipe body 1 in sequence, the inner diameter of the first positioning pipe 201 is larger than that of the first pipe body 1, the inner diameter of the first clamping pipe 202 is larger than that of the first positioning pipe 201, a first check ring 203 is inserted in the first clamping pipe 202, the section of the first check ring 203 is L-shaped and is formed by connecting a tubular first check pipe 2031 and a flaky first check ring 2032, one end of the first check pipe 2031 is connected to the inner hole of the first check ring 2032, the other end of the first check pipe 2031 is abutted against the front end face of the first positioning pipe 201, the outer edge of the first check ring 2032 is abutted against the inner wall of the first clamping pipe 202, the first check ring 203 and the first clamping pipe 202 form an annular first mounting cavity 204, a plurality of first tongue ports 205 which are communicated with the first mounting cavity 204 are uniformly distributed on the first check pipe 2031 in the circumferential direction, and first mounting cavity 204 is elastically connected with first tongue ports 206 which correspond to the first tongue ports 205 one by one, the head of each first locking tongue 206 extends out of the corresponding first tongue opening 205 under the action of elastic force and can be extended and retracted along the radial direction of the first bayonet tube 202.

The second clamping portion 3 includes a tubular connecting base 301 screwed to the outer wall of the front end of the first tube 1, an annular baffle plate 302 is disposed on the inner wall of the connecting base 301, the baffle plate 302 is parallel and opposite to a first baffle ring 2032 of the first baffle ring 203 for preventing the first baffle ring 203 from separating from the first clamping tube 202, the inner hole diameter of the baffle plate 302 is not smaller than the inner diameter of the first positioning tube 201, the front end of the connecting base 301 is connected with a transparent cover 303, a second baffle ring 304 is clamped between the transparent cover 303 and the connecting base 301, the second baffle ring 304 is formed by connecting a tubular second baffle 3041 and a sheet-shaped second baffle 3042, one end of the second baffle 3041 is connected to the inner hole of the second baffle 3042, the other end of the second baffle 3041 is abutted to the front end face of the connecting base 301, the outer edge of the second baffle 3042 is abutted to the inner side wall of the transparent cover 303, the second baffle 3042, the transparent cover 303 and the front end face of the connecting base 301 together form, a plurality of second tongue openings 306 communicated with the second mounting cavity 305 are axially and uniformly distributed on the second baffle 3041, second locking tongues 307 in one-to-one correspondence with the second tongue openings 306 are elastically connected in the second mounting cavity 305, and the head of any second locking tongue 307 extends out of the corresponding second tongue opening 306 under the action of elastic force and can radially extend and retract along the second baffle 304.

The male joint comprises a second pipe body 4, a locking release sleeve 5 and a pressing plate 6, wherein the locking release sleeve 5 and the pressing plate 6 are sleeved on the outer wall of the second pipe body 4, the outer wall of the rear end of the second pipe body 4 radially and outwards extends to form a clamping convex ring 7, the clamping convex ring 7 is matched with the first positioning pipe 201 or matched with the connecting seat 301 in the front of the baffle 302, the outer diameter of the locking release sleeve 5 is consistent with the outer diameter of the clamping convex ring 7, and the pressing plate 6 is connected to one end, away from the clamping convex ring 7, of the locking release sleeve 5.

First annular seal groove 8 has been seted up on the inner wall of first registration arm 201, and the embedded first sealing washer 9 that is equipped with of first annular seal groove 8 for male joint 100 to the joint in first joint portion 2 seals, has seted up second annular seal groove 10 on the connecting seat 301 inner wall that is located baffle 302 the place ahead, and the embedded second sealing washer 11 that is equipped with of second annular seal groove 10 is used for sealing the male joint 100 to the joint in second joint portion 3.

As shown in fig. 3, the male connector 100 is connected to the first connecting portion 2, in this state, the length of the connecting protrusion ring 7 is not greater than the length of the first positioning tube 201, so that the connecting protrusion ring 7 can completely pass through the first connecting tube 202, and the first lock tongue 206 is connected to the front end of the connecting protrusion ring 7, the inner diameter of the front end of the male connector 100 is smaller than the inner diameter of the first tube 1, the inner diameter of the rear end of the male connector 100 is equal to the inner diameter of the first tube 1, as shown in fig. 3, the rear end of the male connector 100 is provided with a taper hole section 14 to connect the inner diameters of the first tube 1 and the front end of the male connector 100, the inner diameter of the baffle 302 is equal to the inner diameter of the first positioning tube 201, and the first sealing ring 9 is connected to the outer wall of.

As shown in fig. 4, the male connector 100 is connected with the second clamping portion 3 in a clamped manner, the length of the clamping convex ring 7 is not greater than the length of the connecting seat 301 in front of the baffle 302, and the inner diameter of the male connector 100 is equal to that of the first pipe body 1.

As shown in fig. 2, the first locking tongue 206 and the second locking tongue 307 are both arc-shaped, the cross section is wedge-shaped, the inclined surfaces of the first locking tongue 206 and the second locking tongue 307 face the front of the first pipe body 1, a portion of any first locking tongue 206 located in the first installation cavity 204 is connected with a plate spring 12, the plate spring 12 is arranged along the tangential direction of the first blocking pipe 2031 and clamped between the outer wall of the first blocking pipe 2031 and the inner wall of the first clamping pipe 202, and when the first locking tongue 206 retracts into the first installation cavity 204, elastic potential energy is generated corresponding to the bending of the plate spring 12 to provide kinetic energy for the first locking tongue 206 to extend out of the first tongue opening 205; the portion of any second latch bolt 307 located in the second mounting cavity 305 is also connected to a plate spring 12, the plate spring 12 is disposed along the tangential direction of the second stop 3041 and clamped between the outer wall of the second stop 3041 and the inner wall of the transparent cover 303, and when the second latch bolt 307 retracts into the second mounting cavity 305, the second latch bolt 307 generates elastic potential energy corresponding to the bending of the plate spring 12, and provides kinetic energy for the second latch bolt 307 to extend out of the second tongue opening 306.

The outer wall of the transparent cover 303 is sleeved with the plastic sheath 13 to protect the transparent cover 303, when the male connector 100 is in butt joint with the female connector 200, the male connector 100 is easy to smash the female connector 200, so that the plastic sheath 13 can protect the transparent cover 303 from being smashed, and the service life of a fire hose interface is prolonged.

The utility model discloses the working process is: as shown in fig. 1 and 3, the male connector 100 is inserted from the front end of the female connector 200, if the male connector 100 is sized to match the first clamping portion 2, after the male connector 100 passes through the second clamping portion 3, the rear end of the male connector 100 contacts with the plurality of first tongues 206, and further the male connector 100 is pushed to be inserted into the female connector 200, the rear end of the male connector 100 pushes the first tongues 206 to contract into the first mounting cavity 204, and at the same time, the plate spring 12 is bent and deformed to accumulate elastic potential energy, after the clamping collar 7 of the male connector 100 completely passes through all the first tongues 206, each first tongue 206 protrudes out of the first tongue opening 205 again to block the front end of the clamping collar 7, at this time, the unlocking sleeve 5 is separated from the clamping collar 7, the inside of the clamping collar 7 is confined between the front end face of the first pipe body 1 and the first tongue 206, and the first sealing ring 9 seals the gap between the clamping collar 7 and the first positioning pipe 201.

When the male connector 100 is to be withdrawn, the unlocking sleeve 5 is pushed to the clamping convex ring 7, and the first bolt 206 is pushed into the first mounting cavity 204 again in the moving process of the unlocking sleeve 5, so that the front end of the clamping convex ring 7 has no obstacle, and the male connector 100 can be pulled out at the moment.

When the male connector 100 is matched with the second clamping portion 3, the male connector 100 can directly push the second locking tongue 307 to retract into the second mounting cavity 305, after the clamping convex ring 7 of the male connector 100 completely passes through each second locking tongue 307, the second locking tongue 307 resets to block in front of the clamping convex ring 7, meanwhile, the unlocking sleeve 5 is separated from the clamping convex ring 7, and the male connector 100 is locked between the second locking tongue 307 and the connecting seat 301.

When the male connector 100 is to be withdrawn, the unlocking sleeve 5 is pushed towards the locking convex ring 7, and the second locking tongue 307 is pushed into the second mounting cavity 305 again in the moving process of the unlocking sleeve 5, so that the front end of the locking convex ring 7 has no obstacle, and the male connector 100 can be pulled out.

It can be seen that the female joint 200 of the fire hose interface can be suitable for the quick butt joint of two different specification male joints 100, and is more convenient to use, and can not have the problem that the butt joint is not up and the time of putting out a fire is delayed.

The above embodiments are merely illustrative of the principles and effects of the present invention, and some embodiments in use, and are not intended to limit the invention; it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications belong to the protection scope of the present invention.

Claims

1. The fire hose interface comprises a male connector (100) and a female connector (200) which are mutually inserted, and is characterized in that the female connector (200) comprises a first pipe body (1), a first clamping part (2) and a second clamping part (3) which are arranged at the front end of the first pipe body (1) in sequence along the axial direction of the first pipe body (1), the first clamping part (2) is positioned between the second clamping part (3) and the first pipe body (1), the inner diameter of the first clamping part (2) is smaller than that of the second clamping part (3), the male connector (100) is clamped with the first clamping part (2) or the second clamping part (3), the first clamping part (2) comprises a first positioning pipe (201) and a first clamping pipe (202) which are coaxially connected at the front end of the first pipe body (1) in sequence, the inner diameter of the first positioning pipe (201) is larger than that of the first pipe body (1), and the inner diameter of the first clamping pipe (202) is larger than that of the first positioning pipe (201), a first check ring (203) is inserted in the first clamping pipe (202), the section of the first check ring (203) is L-shaped, the first check ring is formed by connecting a tubular first blocking pipe (2031) and a sheet-shaped first blocking ring (2032), one end of the first blocking pipe (2031) is connected to an inner hole of the first blocking ring (2032), the other end of the first blocking pipe (2031) is abutted to the front end face of the first positioning pipe (201), the outer edge of the first blocking ring (2032) is abutted to the inner wall of the first clamping pipe (202), the first check ring (203) and the first clamping pipe (202) form an annular first mounting cavity (204), a plurality of first tongue openings (205) communicated with the first mounting cavity (204) are uniformly distributed in the circumferential direction on the first blocking pipe (2031), first lock tongues (206) which are in one-to-one correspondence with the first tongue openings (205) are elastically connected in the first mounting cavity (204), and the head of any first lock tongue (206) extends out of the first lock tongue openings (205) under the action of elasticity and can be radially stretched and stretched out along the first clamping pipe (202);

the second clamping part (3) comprises a tubular connecting base (301) screwed on the outer wall of the front end of the first pipe body (1), an annular baffle plate (302) is arranged on the inner wall of the connecting base (301), the baffle plate (302) is parallel and opposite to a first baffle ring (2032) of the first baffle ring (203) and is used for preventing the first baffle ring (203) from separating from the first clamping connection pipe (202), the diameter of an inner hole of the baffle plate (302) is not smaller than the inner diameter of the first positioning pipe (201), the front end of the connecting base (301) is connected with a transparent cover (303), a second baffle ring (304) is clamped between the transparent cover (303) and the connecting base (301), the second baffle ring (304) is formed by connecting a tubular second baffle pipe (3041) and a flaky second baffle ring (3042), one end of the second baffle pipe (3041) is connected to the inner hole of the second baffle ring (3042), and the other end face of the second baffle pipe (3041) is abutted against the front end face of the connecting base (301), the outer edge of the second baffle ring (3042) is abutted against the inner side wall of the transparent cover (303), the second baffle ring (3042), the transparent cover (303) and the front end face of the connecting seat (301) jointly form an annular second mounting cavity (305), a plurality of second tongue openings (306) communicated with the second mounting cavity (305) are axially and uniformly distributed on the second baffle pipe (3041), second lock tongues (307) which are in one-to-one correspondence with the second tongue openings (306) are elastically connected in the second mounting cavity (305), and the head of any second lock tongue (307) extends out of the corresponding second tongue opening (306) under the action of elastic force and can radially extend and retract along the second retainer ring (304);

the male joint comprises a second pipe body (4), a locking release sleeve (5) and a pressing plate (6) which are sleeved on the outer wall of the second pipe body (4), wherein the outer wall of the rear end of the second pipe body (4) radially and outwards extends to form a clamping convex ring (7), the clamping convex ring (7) is matched with a first positioning pipe (201) or matched with a connecting seat (301) in the front of a baffle (302), the outer diameter of the locking release sleeve (5) is consistent with that of the clamping convex ring (7), and the pressing plate (6) is connected to one end, away from the clamping convex ring (7), of the locking release sleeve (5).

2. A fire hose coupling according to claim 1, wherein a first annular sealing groove (8) is formed in an inner wall of the first positioning pipe (201), a first sealing ring (9) is embedded in the first annular sealing groove (8), a second annular sealing groove (10) is formed in an inner wall of the connecting seat (301) located in front of the baffle (302), and a second sealing ring (11) is embedded in the second annular sealing groove (10).

3. A fire hose coupling according to claim 2, wherein the male coupling (100) is engaged with the first engaging portion (2), the engaging protrusion ring (7) has a length not greater than the length of the first positioning tube (201), the front inner diameter of the male coupling (100) is smaller than the inner diameter of the first tube (1), the rear inner diameter of the male coupling (100) is equal to the inner diameter of the first tube (1), the inner diameter of the baffle (302) is equal to the inner diameter of the first positioning tube (201), and the first sealing ring (9) is engaged with the outer wall of the engaging protrusion ring (7).

4. A fire hose coupling according to claim 2, wherein the male coupling (100) is engaged with the second engaging portion (3), the length of the engaging protrusion ring (7) is not greater than the length of the connection seat (301) in front of the baffle (302), and the inner diameter of the male coupling (100) is equal to the inner diameter of the first pipe body (1).

5. The fire hose coupling according to claim 2, wherein the first locking tongue (206) and the second locking tongue (307) are both arc-shaped, the cross sections of the first locking tongue (206) and the second locking tongue (307) are both wedge-shaped, the inclined surfaces of the first locking tongue (206) and the second locking tongue (307) face the front of the first pipe body (1), a leaf spring (12) is connected to a part of any first locking tongue (206) located in the first mounting cavity (204), the leaf spring (12) is arranged along the tangential direction of the first blocking pipe (2031) and clamped between the outer wall of the first blocking pipe (2031) and the inner wall of the first clamping pipe (202), and when the first locking tongue (206) retracts into the first mounting cavity (204), the first locking tongue bends corresponding to the leaf spring (12) to generate elastic potential energy; the part of any second bolt (307) located in the second mounting cavity (305) is also connected with a plate spring (12), the plate spring (12) is arranged along the tangential direction of the second blocking pipe (3041) and is clamped between the outer wall of the second blocking pipe (3041) and the inner wall of the transparent cover (303), and when the second bolt (307) retracts into the second mounting cavity (305), elastic potential energy is generated corresponding to the bending of the plate spring (12).

6. A fire hose interface according to any one of claims 1 to 5, wherein a plastic sheath (13) is sleeved on the outer wall of the transparent cover (303).