CN215293647U - Flow regulating valve for urban gas - Google Patents

Abstract

The utility model discloses a flow control valve for city gas, including the flow control valve body, the flow control valve body includes the breather pipe, and the breather pipe right-hand member is established to the inlet end, and the left end of breather pipe is established to the end of giving vent to anger, fixed mounting has the installation piece in the breather pipe, and round platform shape groove has been seted up in the left side of installation piece, has seted up the air vent on the right side inner wall in round platform shape groove, and round platform shape inslot seals movable sleeve and is equipped with round platform shape sprue, the top and the equal fixedly connected with fixed block in bottom of round platform shape sprue, the right side fixedly connected with rectangular rod of fixed block. The utility model relates to a rationally, the cooperation of pointer and scale mark can realize adjusting the accurate restriction of flow size, makes things convenient for personnel to use, and is convenient for when gas air feed end stops, and the automatic shutoff to the round platform shape groove in time does not need personnel to carry out independent shutoff operation, reduces the volume that shutoff time interval and gas were revealed.

Description

Flow regulating valve for urban gas

Technical Field

The utility model relates to a flow control valve technical field especially relates to a flow control valve for city gas.

Background

The flow control valve is also called a control valve, in the field of industrial automation process control, a final control element for changing the flow of a medium by means of power operation is adopted, and the flow control valve is suitable for media such as gas, air, water, steam, various corrosive media, slurry, oil products and the like;

the current flow control valve for city gas, it can realize the regulation to the medium flow, but its regulation accuracy is lower, and when the medium stops, can not realize the shutoff to the regulating valve in time automatically, needs personnel's manual operation to carry out the shutoff operation, in the time interval of personnel's shutoff, can cause a large amount of media to reveal, can not satisfy the user demand, synthesizes above-mentioned condition and improves, therefore we have proposed a flow control valve for city gas and are used for solving above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a flow regulating valve for urban gas.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a flow regulating valve for urban gas comprises a flow regulating valve body, wherein the flow regulating valve body comprises a vent pipe, the right end of the vent pipe is arranged as an air inlet end, the left end of the vent pipe is arranged as an air outlet end, a mounting block is fixedly mounted in the vent pipe, a round platform-shaped groove is formed in the left side of the mounting block, an air vent is formed in the inner wall of the right side of the round platform-shaped groove, a round platform-shaped plugging block is movably sleeved in the round platform-shaped groove in a sealing manner, fixed blocks are fixedly connected to the top and the bottom of the round platform-shaped plugging block, a rectangular rod is fixedly connected to the right side of the fixed block, rectangular grooves are formed in the top and the bottom of the left side of the mounting block, the right end of the rectangular rod extends into the corresponding rectangular groove, a spring driving mechanism is fixedly connected between the inner wall of the top and the inner wall of the bottom of the rectangular groove, and a limiting block is fixedly mounted at the right end of the rectangular rod, the rectangular rods are sleeved on the corresponding limiting blocks in a sliding mode, the right sides of the limiting blocks are rotatably provided with thread driving mechanisms, the thread driving mechanisms extend to the right sides of the corresponding rectangular rods and are rotatably installed with the inner walls of the right sides of the rectangular grooves, the spring driving mechanisms are sleeved on the corresponding thread driving mechanisms in a threaded mode, pointers are fixedly connected to the tops of the limiting blocks located above the two limiting blocks, the tops of the pointers are flush with the tops of the installation blocks, transparent glass is fixedly embedded on the inner walls of the tops of the vent pipes, the tops of the transparent glass are provided with scale marks, the pointers are matched with the scale marks, the thread driving mechanisms are fixedly sleeved with first bevel gears, one sides, close to each other, of the two first bevel gears are respectively meshed with a second bevel gear, the two second bevel gears are symmetrically arranged, one side, close to each other, of the two second bevel gears is fixedly connected with a same rotating shaft, and the rotating shafts are located in the vent holes, the mounting block is sleeved on the rotating shaft in a sealing and rotating mode, a third bevel gear is meshed with the top of the first bevel gear located above the two first bevel gears, a round shaft is fixedly connected to the top of the third bevel gear, and the top end of the round shaft extends to the position above the vent pipe and is fixedly connected with a knob.

Preferably, the spring driving mechanism comprises a fixed block fixedly installed between the inner wall of the top of the rectangular groove and the inner wall of the bottom of the rectangular groove, and two springs are fixedly connected between the left side of the fixed block and the right end of the corresponding rectangular rod.

Preferably, the screw thread actuating mechanism installs the screw rod on stopper right side including rotating, and the screw thread of two screw rods revolves to opposite, and the right-hand member of screw rod extends to the right side of the fixed block that corresponds, rotates on the right side inner wall of rectangular channel and installs the square pole, and the screw rod slip cover is established on the square pole that corresponds, and fixed block screw thread cover is established on the screw rod, and the fixed cover of first bevel gear is established on the square pole that corresponds, and the rectangular rod cover is established on the screw rod that corresponds.

Preferably, the first perforation has been seted up on the top inner wall of the rectangular channel that lies in the top in two rectangular channels, the pointer is located first perforation, the front side and the rear side of pointer respectively with first fenestrate front side inner wall and rear side inner wall swing joint, the inlay dress hole has been seted up at the top of breather pipe, inlay the inner wall in dress hole and transparent glass's outside fixed connection, the spacing groove has been seted up on the bottom inner wall of the rectangular channel that lies in the below, the bottom fixedly connected with slider of the stopper that lies in the below, slider and spacing groove sliding connection.

Preferably, the top of the rectangular rod is provided with a rectangular through hole, the front inner wall and the rear inner wall of the rectangular through hole are respectively in sliding connection with the front side and the rear side of the corresponding limiting block, the right inner wall of the rectangular through hole is provided with a second through hole, and the screw rod is located in the corresponding second through hole and is not in contact with the inner wall of the second through hole.

Preferably, the right side of the fixed block is provided with a threaded hole, and the threaded hole is in threaded connection with the corresponding screw.

Preferably, the right end of the screw rod is provided with a square groove, and the outer side of the square rod is in sliding connection with the inner wall of the corresponding square groove.

Preferably, the right side of stopper has been seted up and has been rotated the groove, rotates the fixed cover in the groove and is equipped with first bearing, the inboard outside fixed connection with the screw rod that corresponds of inner circle of first bearing, the equal fixedly connected with anticreep piece in top right side and the bottom right side of screw rod.

Preferably, circular holes are formed in the inner wall of the top of the vent hole and the inner wall of the bottom of the vent hole and communicated with corresponding rectangular grooves, sealing bearings are fixedly sleeved in the circular holes, and the inner sides of the inner rings of the sealing bearings are fixedly connected with the outer sides of the rotating shafts.

Compared with the prior art, the beneficial effects of the utility model are that:

through the cooperation of the vent pipe, the mounting block, the vent hole, the circular truncated cone-shaped groove, the circular truncated cone-shaped block, the fixed block, the rectangular groove, the rectangular rod, the limiting block, the fixed block, the spring, the screw rod, the square rod, the first bevel gear, the second bevel gear, the rotating shaft, the third bevel gear, the circular shaft and the transparent glass, when gas enters from the gas inlet end of the vent pipe, the gas enters the circular truncated cone-shaped groove through the vent hole to press the circular truncated cone-shaped block to move leftwards, so that a gap is gradually generated between the circular truncated cone-shaped block and the side wall of the circular truncated cone-shaped groove, at the moment, the gas enters the gas outlet end of the vent pipe through the gap between the circular truncated cone-shaped block and the side wall of the circular truncated cone-shaped groove, the circular truncated cone-shaped block drives the two rectangular rods to respectively slide leftwards in the corresponding rectangular grooves through the two fixed blocks and compress the spring, and the rectangular rods drive the corresponding rectangular perforation to move leftwards until the right inner wall of the rectangular perforation of the rectangular rod contacts the limiting block, the rectangular rod is limited to move continuously, so that the truncated cone-shaped block is limited to move leftwards, when the gas flow is small, the knob can be rotated in the forward direction to drive the third bevel gear to rotate through the round shaft, the third bevel gear drives the second bevel gear below to rotate through the first bevel gear above, the second bevel gear above and the rotating shaft sequentially, the second bevel gear below drives the first bevel gear below to rotate, the first bevel gear drives the corresponding square rod to rotate, the square rod drives the corresponding screw rod to rotate, the screw rod rotates in the corresponding threaded hole and moves leftwards, the screw rod drives the limiting block to move leftwards through the corresponding first bearing and releases the shielding of the rectangular rod, so that the rectangular rod continuously moves leftwards and stretches the spring, the truncated cone-shaped block continuously moves leftwards, and the gap between the truncated cone-shaped block and the side wall of the truncated cone-shaped groove gradually increases, therefore, the gas flow is increased, and when the upper limit block moves leftwards and simultaneously drives the pointer to move leftwards by a required scale value, the knob stops rotating, so that the gas flow is adjusted;

when the gas supply end of the gas stops supplying gas, the extrusion force of the gas to the truncated cone-shaped plugging block disappears gradually, the elastic force of the spring in the stretching state drives the fixing blocks to move rightwards through the rectangular rods, the two fixing blocks drive the truncated cone-shaped plugging block to rightwards automatically and timely plug the truncated cone-shaped groove, and no personnel is needed to perform independent plugging operation.

The utility model relates to a rationally, the cooperation of pointer and scale mark can realize adjusting the accurate restriction of flow size, makes things convenient for personnel to use, and is convenient for when gas air feed end stops, and the automatic shutoff to the round platform shape groove in time does not need personnel to carry out independent shutoff operation, reduces the volume that shutoff time interval and gas were revealed.

Drawings

Fig. 1 is a schematic structural view of a flow regulating valve for urban gas according to the present invention;

FIG. 2 is a schematic cross-sectional view of FIG. 1;

FIG. 3 is an enlarged view of part A of FIG. 2;

fig. 4 is a schematic top view of the structure of fig. 1.

In the figure: 100 air pipes, 1 mounting block, 2 air holes, 3 truncated cone-shaped grooves, 4 truncated cone-shaped blocking blocks, 5 fixing blocks, 6 rectangular grooves, 7 rectangular rods, 8 limiting blocks, 9 fixing blocks, 10 springs, 11 screw rods, 12 square rods, 13 first bevel gears, 14 second bevel gears, 15 rotating shafts, 16 third bevel gears, 17 circular shafts, 18 transparent glass and 19 pointers.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-4, a flow control valve for urban gas comprises a flow control valve body, the flow control valve body comprises a vent pipe 100, the right end of the vent pipe 100 is set as an air inlet end, the left end of the vent pipe 100 is set as an air outlet end, an installation block 1 is fixedly installed in the vent pipe 100, a circular truncated cone-shaped groove 3 is formed in the left side of the installation block 1, an air vent 2 is formed in the right inner wall of the circular truncated cone-shaped groove 3, a circular truncated cone-shaped block 4 is movably sleeved in the circular truncated cone-shaped groove 3 in a sealing manner, fixed blocks 5 are fixedly connected to the top and the bottom of the circular truncated cone-shaped block 4, a rectangular rod 7 is fixedly connected to the right side of the fixed block 5, rectangular grooves 6 are formed in the top and the bottom of the left side of the installation block 1, the right end of the rectangular rod 7 extends into the corresponding rectangular groove 6, a spring driving mechanism is fixedly connected between the inner wall of the top and the inner wall of the bottom of the rectangular groove 6, and the spring driving mechanism is fixedly installed at the right end of the corresponding rectangular rod 7, a limiting block 8 is connected between the inner wall at the top and the inner wall at the bottom of the rectangular groove 6 in a sliding manner, the rectangular rod 7 is sleeved on the corresponding limiting block 8 in a sliding manner, a thread driving mechanism is rotatably installed at the right side of the limiting block 8, the thread driving mechanism extends to the right side of the corresponding rectangular rod 7 and is rotatably installed with the inner wall at the right side of the rectangular groove 6, a spring driving mechanism is sleeved on the corresponding thread driving mechanism in a threaded manner, a pointer 19 is fixedly connected to the top of the limiting block 8 positioned above the two limiting blocks 8, the top of the pointer 19 is flush with the top of the installation block 1, a transparent glass 18 is fixedly embedded on the inner wall at the top of the vent pipe 100, a scale mark is arranged at the top of the transparent glass 18, the pointer 19 is matched with the scale mark, a first bevel gear 13 is fixedly sleeved on the thread driving mechanism, and a second bevel gear 14 is meshed with one side, which is close to the two first bevel gears 13, the two second bevel gears 14 are symmetrically arranged, one side, close to each other, of each of the two second bevel gears 14 is fixedly connected with the same rotating shaft 15, the rotating shaft 15 is located in the vent hole 2, the mounting block 1 is hermetically and rotatably sleeved on the rotating shaft 15, a third bevel gear 16 is meshed with the top of the first bevel gear 13 located above the two first bevel gears 13, the top of the third bevel gear 16 is fixedly connected with a circular shaft 17, and the top end of the circular shaft 17 extends to the upper side of the vent pipe 100 and is fixedly connected with a knob;

the spring driving mechanism comprises a fixed block 9 fixedly arranged between the inner wall of the top part and the inner wall of the bottom part of the rectangular groove 6, and two springs 10 are fixedly connected between the left side of the fixed block 9 and the right end of the corresponding rectangular rod 7;

screw thread actuating mechanism installs screw rod 11 on stopper 8 right side including rotating, and the screw thread of two screw rods 11 revolves to opposite, and the right-hand member of screw rod 11 extends to the right side of the fixed block 9 that corresponds, rotates on the right side inner wall of rectangular channel 6 and installs square pole 12, and screw rod 11 slip cover is established on the square pole 12 that corresponds, and fixed block 9 thread bush is established on screw rod 11, and the fixed cover of first bevel gear 13 is established on the square pole 12 that corresponds, and 7 covers of rectangular rod are established on the screw rod 11 that corresponds, the utility model relates to a rationally, the cooperation of pointer 19 and scale mark can realize adjusting the accurate restriction of flow size, makes things convenient for personnel to use, and is convenient for when gas air feed end stops, and automatic in time to the shutoff in round platform groove 3, does not need personnel to carry out independent shutoff operation, reduces the volume that shutoff time interval and gas were revealed.

In the utility model, the inner wall of the top of the rectangular groove 6 positioned above in the two rectangular grooves 6 is provided with a first perforation, the pointer 19 is positioned in the first perforation, the front side and the rear side of the pointer 19 are respectively in movable contact with the inner wall of the front side and the inner wall of the rear side of the first perforation, the top of the vent pipe 100 is provided with an embedding hole, the inner wall of the embedding hole is fixedly connected with the outer side of the transparent glass 18, the inner wall of the bottom of the rectangular groove 6 positioned below is provided with a limiting groove, the bottom of the limiting block 8 positioned below is fixedly connected with a slide block, the slide block is in sliding connection with the limiting groove, the top of the rectangular rod 7 is provided with a rectangular perforation, the inner wall of the front side and the inner wall of the rear side of the rectangular perforation are respectively in sliding connection with the front side and the rear side of the corresponding limiting block 8, the inner wall of the right side of the rectangular perforation is provided with a second perforation, the screw rod 11 is positioned in the corresponding second perforation and is not in contact with the inner wall of the second perforation, the right side of the fixed block 9 is provided with a threaded hole which is in threaded connection with a corresponding screw rod 11, the right end of the screw rod 11 is provided with a square groove, the outer side of the square rod 12 is in sliding connection with the inner wall of the corresponding square groove, the right side of the limiting block 8 is provided with a rotating groove, a first bearing is fixedly sleeved in the rotating groove, the inner side of an inner ring of the first bearing is fixedly connected with the outer side of the corresponding screw rod 11, the right side of the top and the right side of the bottom of the screw rod 11 are fixedly connected with anti-falling blocks, the inner walls of the top and the bottom of the vent hole 2 are respectively provided with a circular hole which is communicated with the corresponding rectangular groove 6, a sealing bearing is fixedly sleeved in the circular hole, the inner side of the inner ring of the sealing bearing is fixedly connected with the outer side of the rotating shaft 15, the utility model has reasonable design, the pointer 19 is matched with a scale mark, can realize accurate restriction and adjustment of the flow size, is convenient for personnel to use, and is convenient for stopping at the gas supply end, the circular truncated cone-shaped groove 3 is automatically and timely plugged, independent plugging operation is not needed by personnel, and plugging time interval and gas leakage amount are reduced.

The working principle is as follows: when the gas-fired boiler is used, when gas enters from the gas inlet end of the vent pipe 100, the gas enters the vent hole 2, the gas enters the circular truncated cone-shaped groove 3 through the vent hole 2 to extrude the circular truncated cone-shaped block 4, the extrusion force drives the circular truncated cone-shaped block 4 to move leftwards, gaps are gradually generated between the circular truncated cone-shaped block 4 and the side walls of the circular truncated cone-shaped groove 3 while moving leftwards, at the moment, the gas enters the gas outlet end of the vent pipe 100 through the gaps between the circular truncated cone-shaped block 4 and the side walls of the circular truncated cone-shaped groove 3, the circular truncated cone-shaped block 4 drives the two fixing blocks 5 to move leftwards, the fixing blocks 5 drive the corresponding rectangular rods 7 to slide leftwards in the rectangular grooves 6, the rectangular rods 7 move on the corresponding screw rods 11, the rectangular rods 7 compress the corresponding springs 10 while moving leftwards, and the rectangular rods 7 drive the corresponding rectangular through holes to move leftwards until the inner walls of the right sides of the rectangular through holes are contacted with the right side of the limiting blocks 8, the limiting block 8 limits the rectangular rod 7 to move continuously, and further limits the truncated cone-shaped blocking block 4 to move leftwards;

when the gas flow is small and the gas flow needs to be adjusted, the knob can be rotated in the forward direction to drive the circular shaft 17 to rotate, the circular shaft 17 drives the third bevel gear 16 to rotate, the third bevel gear 16 drives the upper first bevel gear 13 meshed with the third bevel gear to rotate, the upper first bevel gear 13 drives the upper second bevel gear 14 meshed with the upper second bevel gear to rotate, the upper second bevel gear 14 drives the lower second bevel gear 14 to rotate through the rotating shaft 15, the lower second bevel gear 14 drives the lower first bevel gear 13 to rotate, the first bevel gear 13 drives the corresponding square rod 12 to rotate, the square rod 12 drives the screw rod 11 to rotate through the corresponding square groove, under the action of the threaded hole formed in the fixed block 9, the screw rod 11 rotates and moves leftwards at the same time, the screw rod 11 drives the limit block 8 to move leftwards through the corresponding first bearing, the stop block 8 moves leftwards and simultaneously loosens the shielding of the corresponding rectangular rod 7 gradually, so that the rectangular rod 7 can continue to move leftwards and stretch the spring 10, the truncated cone-shaped block 4 continues to move leftwards, the truncated cone-shaped block 4 moves leftwards and simultaneously the gap between the truncated cone-shaped block 4 and the side wall of the truncated cone-shaped groove 3 gradually increases, so that the gas flow is increased, the upper stop block 8 moves leftwards and simultaneously drives the pointer 19 to move leftwards, when the pointer 19 is observed through the transparent glass 18 to indicate a required scale interval, the knob is stopped to rotate, the position of the stop block 8 is fixed under the action of the self thread locking force of the threaded hole and the corresponding screw rod 11, so that the movable positions of the rectangular rod 7 and the truncated cone-shaped block 4 are fixed, and the size of the gap between the truncated cone-shaped block 4 and the side wall of the truncated cone-shaped groove 3 is fixed, therefore, the adjustment of the flow rate is realized, and the pointer 19 is matched with the scale marks, so that the accurate limiting adjustment of the flow rate can be realized, and the use by personnel is facilitated;

when the gas supply end of the gas stops supplying gas, the extrusion force of the gas to the truncated cone-shaped plugging block 4 disappears gradually, the elastic force of the spring 10 in the stretching state drives the rectangular rod 7 to move rightwards, the two rectangular blocks 7 drive the truncated cone-shaped plugging block 4 to move rightwards through the two fixing blocks 5 to plug the truncated cone-shaped groove 3, so that the automatic and timely plugging of the truncated cone-shaped groove 3 is realized, the individual plugging operation of personnel is not needed, the plugging time interval is reduced, and the gas leakage amount is reduced.

In the description of the present application, it should be further noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, a connection through an intermediate medium, and a connection between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to specific circumstances.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (9)

1. A flow control valve for urban gas comprises a flow control valve body, wherein the flow control valve body comprises a vent pipe (100), the right end of the vent pipe (100) is arranged as an air inlet end, and the left end of the vent pipe (100) is arranged as an air outlet end, and is characterized in that an installation block (1) is fixedly installed in the vent pipe (100), a circular truncated cone-shaped groove (3) is formed in the left side of the installation block (1), an air vent (2) is formed in the inner wall of the right side of the circular truncated cone-shaped groove (3), a circular truncated cone-shaped plugging block (4) is movably sleeved in the circular truncated cone-shaped groove (3) in a sealing manner, fixed blocks (5) are fixedly connected to the top and the bottom of the circular truncated cone-shaped plugging block (4), a rectangular rod (7) is fixedly connected to the right side of the fixed blocks (5), rectangular grooves (6) are formed in the top and the bottom of the left side of the installation block (1), and the right end of the rectangular rod (7) extends into the corresponding rectangular groove (6), a spring driving mechanism is fixedly connected between the top inner wall and the bottom inner wall of the rectangular groove (6), the spring driving mechanism is fixedly installed at the right end of the corresponding rectangular rod (7), a limiting block (8) is slidably connected between the top inner wall and the bottom inner wall of the rectangular groove (6), the rectangular rod (7) is slidably sleeved on the corresponding limiting block (8), a thread driving mechanism is rotatably installed on the right side of the limiting block (8), the thread driving mechanism extends to the right side of the corresponding rectangular rod (7) and is rotatably installed with the right inner wall of the rectangular groove (6), the thread of the spring driving mechanism is sleeved on the corresponding thread driving mechanism, a pointer (19) is fixedly connected to the top of the limiting block (8) positioned above the two limiting blocks (8), the top of the pointer (19) is flush with the top of the installation block (1), and transparent glass (18) is fixedly embedded on the top inner wall of the vent pipe (100), the top of transparent glass (18) is equipped with the scale mark, pointer (19) and scale mark cooperate, the last fixed cover of screw drive mechanism is equipped with first bevel gear (13), the one side that two first bevel gear (13) are close to each other all is engaged with second bevel gear (14), two second bevel gear (14) symmetry set up, the one side fixedly connected with same pivot (15) that two second bevel gear (14) are close to each other, pivot (15) are located air vent (2), installation piece (1) seal rotation cover is established on pivot (15), the top of the first bevel gear (13) that is located the top in two first bevel gear (13) meshes has third bevel gear (16), the top fixedly connected with round axle (17) of third bevel gear (16), the top of round axle (17) extends to the top of breather pipe (100) and fixedly connected with knob.

2. The flow regulating valve for urban gas according to claim 1, wherein the spring driving mechanism comprises a fixed block (9) fixedly installed between the top inner wall and the bottom inner wall of the rectangular groove (6), and two springs (10) are fixedly connected between the left side of the fixed block (9) and the right end of the corresponding rectangular rod (7).

3. The flow regulating valve for urban gas according to claim 1, wherein the thread driving mechanism comprises a screw (11) rotatably installed on the right side of the limiting block (8), the thread turning directions of the two screws (11) are opposite, the right end of each screw (11) extends to the right side of the corresponding fixed block (9), a square rod (12) is rotatably installed on the inner wall of the right side of the rectangular groove (6), the screw (11) is slidably sleeved on the corresponding square rod (12), the fixed block (9) is threadedly sleeved on the screw (11), the first bevel gear (13) is fixedly sleeved on the corresponding square rod (12), and the rectangular rod (7) is sleeved on the corresponding screw (11).

4. The flow regulating valve for urban gas according to claim 1, wherein a first through hole is formed in the inner wall of the top of the rectangular groove (6) located above in the two rectangular grooves (6), the pointer (19) is located in the first through hole, the front side and the rear side of the pointer (19) are respectively in movable contact with the inner wall of the front side and the inner wall of the rear side of the first through hole, the top of the vent pipe (100) is provided with an embedded hole, the inner wall of the embedded hole is fixedly connected with the outer side of the transparent glass (18), the inner wall of the bottom of the rectangular groove (6) located below is provided with a limiting groove, the bottom of the limiting block (8) located below is fixedly connected with a sliding block, and the sliding block is in sliding connection with the limiting groove.

5. The flow regulating valve for urban gas according to claim 3, wherein a rectangular through hole is formed in the top of the rectangular rod (7), the front inner wall and the rear inner wall of the rectangular through hole are respectively in sliding connection with the front side and the rear side of the corresponding limiting block (8), a second through hole is formed in the right inner wall of the rectangular through hole, and the screw (11) is located in the corresponding second through hole and is not in contact with the inner wall of the second through hole.

6. The flow regulating valve for urban gas according to claim 3, wherein a threaded hole is formed in the right side of the fixing block (9), and the threaded hole is in threaded connection with the corresponding screw (11).

7. The flow control valve for urban gas according to claim 3, wherein a square groove is formed at the right end of the screw rod (11), and the outer side of the square rod (12) is slidably connected with the inner wall of the corresponding square groove.

8. The flow control valve for urban gas according to claim 3, wherein a rotation groove is formed on the right side of the limiting block (8), a first bearing is fixedly sleeved in the rotation groove, the inner side of the inner ring of the first bearing is fixedly connected with the outer side of the corresponding screw rod (11), and anti-dropping blocks are fixedly connected to the top right side and the bottom right side of the screw rod (11).

9. The flow regulating valve for urban gas according to claim 1, wherein circular holes are formed in the top inner wall and the bottom inner wall of the vent hole (2), the circular holes are communicated with the corresponding rectangular grooves (6), a sealing bearing is fixedly sleeved in each circular hole, and the inner side of an inner ring of each sealing bearing is fixedly connected with the outer side of the rotating shaft (15).

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