Gas meter with gas leakage detection function

Abstract

The invention relates to the technical field of gas meters, and discloses a gas meter with a gas leakage detection function, which comprises a gas meter, a gas inlet pipe is arranged at the top of the gas meter, a gas outlet pipe is arranged at the top of the gas meter, fastening mechanisms are arranged on the gas inlet pipe and the gas outlet pipe, and sealing mechanisms are arranged on the gas inlet pipe and the gas outlet pipe. Prompting mechanisms are arranged on the air inlet pipe and the air outlet pipe, and protective closing mechanisms are arranged on the air inlet pipe and the air outlet pipe; the fastening mechanism is used for stabilizing the connecting position of the air inlet pipe and the air outlet pipe. According to the gas meter with the gas leakage detection function, the protection closing mechanism is arranged, the function of cutting off gas supply when gas leakage is detected is achieved, the whole mechanism reacts rapidly, gas supply is cut off, and potential dangers are prevented. By means of the automatic response design, the safety of the gas meter is greatly improved, even if tiny gas leakage occurs, the guide block can be pushed after long-term accumulation, and the follow-up gas leakage reminding and cutting-off functions are triggered.

Description

Technical Field

[0001] The invention relates to the technical field of gas meters, in particular to a gas meter with a gas leakage detection function. Background Art

[0002] A gas meter is an instrument used to measure and record the consumption of natural gas, liquefied petroleum gas or other gases. It is usually used in home, commercial or industrial environments to help gas companies accurately measure the gas consumption of users and charge them according to the usage.

[0003] Gas meter leak detection is carried out in many cases by electronic detection instruments. Fixed gas detection alarm devices mainly rely on electronic sensors and are usually installed in kitchens, near stoves or other places where gas is used. They can continuously monitor the concentration of combustible gases (such as natural gas or liquefied petroleum gas) in the air. Once the concentration reaches or exceeds the set safety threshold, the device will sound an alarm or flash a prompt to remind the user to take timely measures. This traditional electronic detection instrument can indeed detect gas leaks and sound an alarm. It can effectively test the static leakage of the machine or structural components of the gas meter, generally leaking at the joints. However, although these detection technologies can be very effective in identifying the presence of gas leaks, their limitation is that they cannot take immediate physical measures to deal with the leak. For example, traditional gas detection equipment can only sound an alarm, but cannot autonomously intervene in the pipeline system, and cannot directly control the flow of gas or block the source of the leak. This means that although the detection can prompt a warning in time, if there is no timely response or human intervention, the leak may continue to spread, increasing the risk of accidents. There is also evidence in the scientific literature that gas leaks are usually hidden in the early stages and the leakage rate may be very low, but over time, small leaks will gradually expand to reach dangerous concentrations of combustible gas. This makes it difficult to ensure safety protection by relying solely on detection and alarm systems. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies of the prior art, the present invention provides a gas meter with a gas leakage detection function, which solves the problem that electronic sensors monitor the concentration of combustible gas and issue an alarm but cannot automatically take measures to deal with the leakage.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a gas meter with a gas leakage detection function, comprising a gas meter, an air inlet pipe is arranged on the top of the gas meter, an air outlet pipe is arranged on the top of the gas meter, and a fastening mechanism, a sealing mechanism, a prompting mechanism and a protective closing mechanism are arranged on the air inlet pipe and the air outlet pipe; the fastening mechanism is used to stabilize the connection position of the air inlet pipe and the air outlet pipe, the sealing mechanism is used to perform secondary sealing on the leaked gas, the prompting mechanism is used to warn when the gas leaks, and the protective closing mechanism is used to seal the gas after the leak.

[0008] In some embodiments, the fastening mechanism includes an entry connecting pipe, which is fixedly connected to the top of the gas meter, a receiving plate is fixedly connected to the entry connecting pipe, a fastening nut is rotatably connected to the outer wall of the intake pipe, a ring is rotatably connected to the outer wall of the fastening nut, a sealing gasket is fixedly connected to the top of the entry connecting pipe, one end of a spring is fixedly connected to the inner wall of the fastening nut, the other end of the spring is fixedly connected to a trapezoidal block, and a limited transmission plate is fixedly connected to the inner wall of the ring.

[0009] In some embodiments, the outer wall of the trapezoidal block is slidably connected to the inner wall of the fastening nut member, and the limiting transmission plates are arranged in a circular array on the inner wall of the ring member.

[0010] In some embodiments, the sealing mechanism includes a sealing cavity, which is opened on the inner wall of the ring member, and a bottom cavity is opened on the inner wall of the ring member, a connecting pipe is fixedly connected to the inner wall of the ring member, one end of the connecting pipe is fixedly connected to an upper annular sealing airbag, the other end of the connecting pipe is fixedly connected to a lower annular sealing airbag, the outer wall of the connecting pipe is fixedly connected to an input pipe, the top of the lower annular sealing airbag is fixedly connected to a one-way tube, a fixed support plate is fixedly connected to the inner wall of the one-way tube, a circular ring member is fixedly connected to the inner wall of the one-way tube, one end of a spring 2 is fixedly connected to the top of the fixed support plate, the other end of the spring 2 is fixedly connected to an airway blocking member, a piston on the inner wall of the sealing cavity is connected to a piston ring member, the bottom of the piston ring member is fixedly connected to a vertical guide rod, and the bottom of the vertical guide rod is rotatably connected to a ball.

[0011] In some embodiments, the outer wall of the one-way tube is fixedly connected to the inner wall of the ring member, a through hole is opened on the surface of the circular ring member, and the outer wall of the vertical guide rod is slidably connected to the inner wall of the ring member.

[0012] In some embodiments, the prompt mechanism includes an entrance port, which is opened at the top of the receiving tray, and a connecting cavity is opened on the inner wall of the receiving tray. The entrance port makes the connecting cavity and the top communicate with each other, one end of spring three is fixedly connected to the inner wall of the connecting cavity, the other end of spring three is fixedly connected to a guide block, the outer wall of the guide block is fixedly connected to one end of a telescopic tube, the other end of the telescopic tube is fixedly connected to the outer wall of a fixed square block, the outer wall of the guide block is fixedly connected to a fixed top plate, two side limit plates are fixedly connected to the inner wall of the connecting cavity, the outer wall of the fixed top plate is fixedly connected to a cylindrical guide rod, the bottom of the fixed top plate is fixedly connected to one end of a spring four, and the other end of the spring four is fixedly connected to a sliding upper and lower block.

[0013] In some embodiments, the guide block is slidably connected to the inner wall of the connecting cavity, the outer wall of the fixed square block is fixedly connected to the inner wall of the connecting cavity, a through hole is opened on the surface of the fixed square block, the outer wall of the cylindrical guide rod is slidably connected to the inner wall of the receiving plate, and the outer wall of the sliding upper and lower blocks is slidably connected to the inner wall of the guide block.

[0014] In some embodiments, the protective closing mechanism includes a hollow block, which is fixedly connected to the bottom of the receiving plate, one end of a spring five is fixedly connected to the inner wall of the hollow block, the other end of the spring five is fixedly connected to a long strip block, the outer wall of the long strip block is fixedly connected to a connecting handle, one end of a spring six is ​​fixedly connected to the inner wall of the long strip block, the other end of the spring six is ​​fixedly connected to a limited position clamping block, a sealing gasket two is fixedly connected to the inner wall of the hollow block, a through hole is opened on the inner wall of the hollow block, one end of a spring seven is fixedly connected to the inner wall of the long strip block, and the other end of the spring seven is fixedly connected to a blocking disk.

[0015] In some embodiments, the outer wall of the elongated block is piston-connected to the inner wall of the hollow block, the outer wall of the limiting clamping block is slidingly connected to the inner wall of the elongated block, the outer wall of the blocking disc is piston-connected to the inner wall of the elongated block, and an arc-shaped chamfer is provided at the bottom of the blocking disc.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the present invention provides a gas meter with a gas leakage detection function, which has the following beneficial effects:

[0018] 1. The gas meter with gas leakage detection function uses a protective closing mechanism to cut off the gas supply when a gas leak is detected. The entire mechanism responds quickly to cut off the gas supply to prevent potential dangers. This automatic response design greatly improves the safety of the gas meter, and even a small leak will push the guide block over a long period of time, triggering subsequent gas leak reminders and cut-off functions.

[0019] 2. The gas meter with a gas leakage detection function is set up by a sealing mechanism. The inner wall of the ring part is connected to the top thread of the connecting pipe until the sealing gasket at the top of the connecting pipe is tightly in contact with the inner wall of the ring part, thereby achieving a connection. At this time, the reaction force on the trapezoidal block increases, and the trapezoidal block resists the spring and retracts into the fastening nut part, so that the trapezoidal block cannot drive the limit transmission plate to rotate, thereby avoiding excessive tightening. This makes the connection between the gas meter and the air inlet and outlet pipes more stable, effectively preventing damage or deformation caused by excessive tightening, and ensuring that the connection remains stable under appropriate tightness.

[0020] 3. The gas meter with a gas leakage detection function is set up with a sealing mechanism, so that the air inlet pipe and the ring part are tightly sealed by the upper annular sealing airbag, and the receiving plate and the ring part are tightly sealed by the lower annular sealing airbag, so that the connection part is sealed twice, which significantly reduces the risk of gas leakage and ensures the safe and stable operation of the system.

[0021] 4. The gas meter with a gas leakage detection function is arranged by a sealing mechanism. When the ferrule part and the top threaded connection part entering the connecting pipe leak, the gas enters the bottom cavity and then enters the one-way tube. At this time, the leaked gas has enough pressure to push open the blocked airway part and enter the lower annular sealing airbag, and then enters the upper annular sealing airbag through the connecting pipe, so that the upper annular sealing airbag and the lower annular sealing airbag are further expanded, thereby strengthening the secondary sealing effect.

[0022] 5. The gas meter with a gas leakage detection function is provided with a prompt mechanism. The gas leaked in the bottom cavity enters the telescopic tube through the inlet, the connecting cavity, and the through hole of the fixed square block, so that the telescopic tube extends to drive the guide block to move away from the fixed square block, and the guide block drives the fixed top plate and the cylindrical guide rod to move away from the fixed square block, so that the cylindrical guide rod extends. At this time, the user sees the cylindrical guide rod to be reminded of the natural gas leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of a gas meter with a gas leakage detection function proposed by the present invention;

[0024] Figure 2 A structural schematic diagram of a gas meter fastening nut with a gas leakage detection function proposed by the present invention;

[0025] Figure 3 A schematic cross-sectional structure diagram of a gas meter ferrule with a gas leakage detection function proposed by the present invention;

[0026] Figure 4 A schematic diagram of the structure of a trapezoidal block of a gas meter with a gas leakage detection function proposed by the present invention;

[0027] Figure 5 A schematic diagram of the cross-sectional structure of a top view of a gas meter ferrule with a gas leakage detection function proposed by the present invention;

[0028] Figure 6 A structural schematic diagram of a gas meter sealing mechanism with a gas leakage detection function proposed by the present invention;

[0029] Figure 7 A schematic cross-sectional structure diagram of a gas meter-type straight tube with a gas leakage detection function proposed by the present invention;

[0030] Figure 8 This is a schematic diagram of the structure of a gas meter ball with a gas leakage detection function proposed by the present invention;

[0031] Fig. 9 A schematic cross-sectional structure diagram of a gas meter receiving plate with a gas leakage detection function proposed by the present invention;

[0032] Fig.10 A schematic structural diagram of a partial cross-section of a gas meter receiving plate with a gas leakage detection function proposed by the present invention;

[0033] Fig.11 A schematic cross-sectional structure diagram of a hollow block of a gas meter with a gas leakage detection function proposed by the present invention;

[0034] Fig.12 The present invention is a schematic diagram of the cross-sectional structure of a long strip of a gas meter with a gas leakage detection function.

[0035] In the figure: 1, gas meter; 2, air inlet pipe; 3, air outlet pipe; 4, fastening mechanism; 41, entry connecting pipe; 42, receiving plate; 43, fastening nut; 44, ferrule; 45, sealing gasket 1; 46, spring 1; 47, trapezoidal block; 48, limit transmission plate; 5, sealing mechanism; 51, sealing cavity; 52, bottom cavity; 53, connecting pipeline; 54, upper annular sealing airbag; 55, lower annular sealing airbag; 56, input pipe; 57, one-way pipe; 58, fixed support plate; 59, piston ring; 510, vertical guide rod; 511, ball; 512, spring 2; 513. Airway blocking part; 514. Circular ring part; 6. Prompt mechanism; 61. Entrance port; 62. Connecting cavity; 63. Spring three; 64. Guide block; 65. Telescopic tube; 66. Fixed square block; 67. Fixed top plate; 68. Limiting plates on both sides; 69. Cylindrical guide rod; 610. Spring four; 611. Sliding upper and lower blocks; 7. Protective closing mechanism; 71. Hollow block; 72. Spring five; 73. Long strip block; 74. Connecting handle; 75. Spring six; 76. Limiting card block; 77. Sealing gasket two; 78. Through hole; 79. Spring seven; 710. Blocking disc. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] See also Figure 1-Figure 12 A gas meter with a gas leakage detection function comprises a gas meter 1, an air inlet pipe 2 is arranged on the top of the gas meter 1, an air outlet pipe 3 is arranged on the top of the gas meter 1, a fastening mechanism 4 is arranged on the air inlet pipe 2 and the air outlet pipe 3, a sealing mechanism 5 is arranged on the air inlet pipe 2 and the air outlet pipe 3, a prompting mechanism 6 is arranged on the air inlet pipe 2 and the air outlet pipe 3, and a protective closing mechanism 7 is arranged on the air inlet pipe 2 and the air outlet pipe 3; the fastening mechanism 4 is used to stabilize the connection position of the air inlet pipe 2 and the air outlet pipe 3, the sealing mechanism 5 is used to perform secondary sealing of leaked gas, the prompting mechanism 6 is used to warn when the gas leaks, and the protective closing mechanism 7 is used to seal after the gas leaks.

[0038] In this embodiment, the fastening mechanism 4 includes an entry connecting pipe 41, which is fixedly connected to the top of the gas meter 1. A receiving plate 42 is fixedly connected to the entry connecting pipe 41. A fastening nut 43 is rotatably connected to the outer wall of the intake pipe 2. The top of the fastening nut 43 is a regular hexagonal prism, which is convenient for a tool such as a sleeve to be sleeved and screwed. A ring 44 is rotatably connected to the outer wall of the fastening nut 43. A sealing gasket 45 is fixedly connected to the top of the entry connecting pipe 41, so that when the intake pipe 2 and the entry connecting pipe 41 are in tight contact, the gap between them will be sealed. One end of a spring 46 is fixedly connected to the inner wall of the fastening nut 43, and the other end of the spring 46 is fixedly connected to a trapezoidal block 47. A limited transmission plate 48 is fixedly connected to the inner wall of the ring 44. The outer wall of the trapezoidal block 47 is slidably connected to the inner wall of the fastening nut 43, so that the trapezoidal block 47 can stably reciprocate on the inner wall of the fastening nut 43. The plates 48 are arranged in a circumferential array on the inner wall of the ring member 44. When the inclined surface of the trapezoidal block 47 contacts the ring member 44, a circumferential force is generated to drive the ring member 44 to rotate, so that the threaded portion entering the top of the connecting pipe 41 is connected with the internal thread at the bottom of the inner wall of the ring member 44, and the fastening nut member 43 is driven to rotate through a tool such as a sleeve, and the fastening nut member 43 drives the trapezoidal block 47 to rotate, and the inclined surface of the trapezoidal block 47 contacts the limit transmission plate 48, so that the limit transmission plate 48 8 is subjected to a circumferential force to drive the ring member 44 to rotate, and the inner wall of the ring member 44 is connected with the top thread of the connecting pipe 41 until the sealing gasket 45 at the top of the connecting pipe 41 is tightly in contact with the inner wall of the ring member 44, thereby achieving a connection. At this time, the reaction force on the trapezoidal block 47 increases, and the trapezoidal block 47 is retracted into the fastening nut member 43 against the spring 46, so that the trapezoidal block 47 cannot drive the limiting transmission plate 48 to rotate, thereby avoiding excessive tightening.

[0039] Furthermore, the sealing mechanism 5 includes a sealing cavity 51, which is opened on the inner wall of the ring member 44, and a bottom cavity 52 is opened on the inner wall of the ring member 44. A connecting pipe 53 is fixedly connected to the inner wall of the ring member 44, and one end of the connecting pipe 53 is fixedly connected to an upper annular sealing airbag 54, which can be tightly contacted with the intake pipe 2 when the upper annular sealing airbag 54 is expanded, and a lower annular sealing airbag 55 is fixedly connected to the other end of the connecting pipe 53. The lower annular sealing airbag 55 is located at the bottom of the ring member 44, and when the lower annular sealing airbag 55 is expanded, it can contact the ring member 44. The outer wall of the connecting pipe 53 is fixedly connected with an input pipe 56, and the input pipe 56 makes the connecting pipe 53 and the sealing cavity 51 communicate with each other. The top of the lower annular sealing airbag 55 is fixedly connected with a one-way pipe 57, and the inner wall of the one-way pipe 57 is fixedly connected with a fixed support plate 58, and the inner wall of the one-way pipe 57 is fixedly connected with a circular ring member 514. The top of the fixed support plate 58 is fixedly connected with one end of a spring 512, and the other end of the spring 512 is fixedly connected with an airway blocking member 513. The airway blocking member 513 is connected with the circular ring member 514 under the action of the spring 512. 14 is tightly fitted, the piston on the inner wall of the sealing cavity 51 is connected to a piston ring 59, the bottom of the piston ring 59 is fixedly connected to a vertical guide rod 510, the bottom of the vertical guide rod 510 is rotatably connected to a ball 511, the outer wall of the one-way tube 57 is fixedly connected to the inner wall of the ring member 44, the one-way tube 57 makes the bottom cavity 52 and the lower annular sealing airbag 55 communicate with each other, the surface of the circular ring member 514 is provided with a through hole, so that air can pass through the through hole of the circular ring member 514, the outer wall of the vertical guide rod 510 is slidably connected to the inner wall of the ring member 44, so that the vertical guide rod 510 is stable. When the ring member 44 is connected with the top thread of the connecting pipe 41, the ball 511 at the bottom of the vertical guide rod 510 contacts the top of the receiving plate 42, causing the piston ring 59 to move upward. At this time, the piston ring 59 drives the air in the sealing cavity 51 to enter the connecting pipe 53 through the input pipe 56, and then enters the upper annular sealing airbag 54 and the lower annular sealing airbag 55 respectively, so that the air inlet pipe 2 and the ring member 44 are tightly sealed by the upper annular sealing airbag 54, and the receiving plate 42 and the ring member 44 are tightly sealed by the lower annular sealing airbag 55. When the threaded connection between the ferrule 44 and the top of the connecting pipe 41 leaks, the gas enters the bottom cavity 52 and then enters the one-way tube 57. The leaked gas has enough pressure to push open the blocking airway part 513 and enter the lower annular sealing airbag 55, and then enters the upper annular sealing airbag 54 through the connecting pipe 53, so that the upper annular sealing airbag 54 and the lower annular sealing airbag 55 are further expanded, thereby strengthening the secondary seal.

[0040] Furthermore, the prompt mechanism 6 includes an entry port 61, which is opened at the top of the receiving tray 42. A connecting cavity 62 is opened on the inner wall of the receiving tray 42. The entry port 61 makes the connecting cavity 62 and the top communicate with each other. One end of a spring three 63 is fixedly connected to the inner wall of the connecting cavity 62, and the other end of the spring three 63 is fixedly connected to a guide block 64. The outer wall of the guide block 64 is fixedly connected to one end of a telescopic tube 65, and the other end of the telescopic tube 65 is fixedly connected to the outer wall of a fixed square block 66. The outer wall of the guide block 64 is fixedly connected to a fixed top plate 67. The inner wall of the connecting cavity 62 is fixedly connected to limit plates 68 on both sides, so that the maximum moving distance of the guide block 64 is limited. The outer wall of the fixed top plate 67 is fixedly connected to the inner wall of the connecting cavity 62. The wall is fixedly connected with a cylindrical guide rod 69, the bottom of the fixed top plate 67 is fixedly connected with one end of a spring four 610, the other end of the spring four 610 is fixedly connected with a sliding upper and lower block 611, the guide block 64 is slidably connected to the inner wall of the connecting cavity 62, so that the guide block 64 can stably reciprocate, the outer wall of the fixed square block 66 is fixedly connected to the inner wall of the connecting cavity 62, and a through hole is provided on the surface of the fixed square block 66. The through hole of the fixed square block 66 allows the air in the connecting cavity 62 to enter the telescopic tube 65, the outer wall of the cylindrical guide rod 69 is slidably connected to the inner wall of the receiving plate 42, and the outer wall of the sliding upper and lower block 611 is slidably connected to the inner wall of the guide block 64, so that the sliding upper and lower block 611 can slide up and down stably. The gas leaked in the bottom cavity 52 enters into the telescopic tube 65 through the inlet 61, the connecting cavity 62, and the through hole of the fixed square block 66, so that the telescopic tube 65 extends and drives the guide block 64 to move away from the fixed square block 66. The guide block 64 drives the fixed top plate 67 and the cylindrical guide rod 69 to move away from the fixed square block 66, so that the cylindrical guide rod 69 extends. At this time, the user can see the cylindrical guide rod 69 to be reminded of the natural gas leakage.

[0041] In addition, the protective closing mechanism 7 includes a hollow block 71, which is fixedly connected to the bottom of the receiving plate 42, one end of a spring 5 72 is fixedly connected to the inner wall of the hollow block 71, the other end of the spring 5 72 is fixedly connected to a long strip block 73, the outer wall of the long strip block 73 is fixedly connected to a connecting handle 74, one end of a spring 6 75 is fixedly connected to the inner wall of the long strip block 73, the other end of the spring 6 75 is fixedly connected to a limited position clamping block 76, a sealing gasket 2 77 is fixedly connected to the inner wall of the hollow block 71, which plays a role in strengthening the seal, a through hole 78 is opened on the inner wall of the hollow block 71, and the long strip block 7 3 is fixedly connected with one end of spring seven 79, and the other end of spring seven 79 is fixedly connected with blocking disc 710, the outer wall of long block 73 is connected with the inner wall of hollow block 71 by piston, which plays the role of sealing and stable reciprocating sliding, the outer wall of limit clamping block 76 is connected with the inner wall of long block 73 by sliding, the outer wall of blocking disc 710 is connected with the inner wall of long block 73 by piston, and the bottom of blocking disc 710 is provided with arc chamfer, so that when blocking disc 710 is subjected to lateral tension, the arc chamfer design of blocking disc 710 can smoothly move out of the groove where sealing gasket 2 77 is located. Until spring four 610 drives the sliding upper and lower blocks 611 to push downward against limit clamping block 76 and retract into long block 73, at this time, long block 73 is retracted into hollow block 71 under the action of spring five 72, until spring seven 79 drives blocking disc 710 to push closely against sealing gasket 2 77.

[0042] In summary, the gas meter with a gas leakage detection function connects the threaded portion at the top of the connecting pipe 41 with the internal thread at the bottom of the inner wall of the ferrule 44, and drives the fastening nut 43 to rotate through a tool such as a sleeve, and the fastening nut 43 drives the trapezoidal block 47 to rotate. The inclined surface of the trapezoidal block 47 abuts against the limiting transmission plate 48, so that the limiting transmission plate 48 is subjected to a circumferential force to drive the ferrule 44 to rotate, and the inner wall of the ferrule 44 is connected with the top thread of the connecting pipe 41 until the connecting pipe is entered. The sealing gasket 45 at the top of 41 is in close contact with the inner wall of the ring member 44, playing a connecting role. At this time, the reaction force on the trapezoidal block 47 increases, and the trapezoidal block 47 resists the spring 46 and retracts into the fastening nut member 43, so that the trapezoidal block 47 cannot drive the limiting transmission plate 48 to rotate, avoiding excessive tightening. This makes the connection between the gas meter 1 and the inlet pipe 2 and the outlet pipe 3 more stable, effectively preventing damage or deformation caused by excessive tightening, and ensuring that the connection remains stable under appropriate tightness.

[0043] Then pull the connecting handle 74 to drive the long block 73, and the long block 73 drives the limiting clamping block 76 to move away from the spring five 72 until the spring six 75 drives the limiting clamping block 76 to clamp with the outer wall of the hollow block 71, so that the gas can pass through the inner wall of the hollow block 71.

[0044] When the ring member 44 is connected to the top thread of the connecting pipe 41, the ball 511 at the bottom of the vertical guide rod 510 contacts the top of the receiving plate 42, causing the piston ring 59 to move upward. At this time, the piston ring 59 drives the air in the sealing chamber 51 to enter the connecting pipe 53 through the input pipe 56, and then enter the upper annular sealing airbag 54 and the lower annular sealing airbag 55 respectively, so that the air inlet pipe 2 and the ring member 44 are tightly sealed by the upper annular sealing airbag 54, and the receiving plate 42 and the ring member 44 are tightly sealed by the lower annular sealing airbag 55, so that the connecting part is secondary sealed, which significantly reduces the risk of gas leakage and ensures safe and stable operation of the system.

[0045] Under the action of the second spring 512 , the air passage blocking member 513 in the one-way tube 57 is tightly fitted to the annular member 514 . At this time, the air in the bottom cavity 52 cannot push the air passage blocking member 513 away and enter the lower annular sealing airbag 55 .

[0046] When the threaded connection between the ferrule 44 and the top of the connecting pipe 41 leaks, the gas enters the bottom cavity 52 and then enters the one-way tube 57. The leaked gas has enough pressure to push open the blocking airway part 513 and enter the lower annular sealing airbag 55, and then enters the upper annular sealing airbag 54 through the connecting pipe 53, so that the upper annular sealing airbag 54 and the lower annular sealing airbag 55 are further expanded, thereby strengthening the secondary seal.

[0047] The gas leaked in the bottom cavity 52 enters into the telescopic tube 65 through the inlet 61, the connecting cavity 62, and the through hole of the fixed square block 66, so that the telescopic tube 65 extends and drives the guide block 64 to move away from the fixed square block 66. The guide block 64 drives the fixed top plate 67 and the cylindrical guide rod 69 to move away from the fixed square block 66, so that the cylindrical guide rod 69 extends. At this time, the user can see the cylindrical guide rod 69 to be reminded of the natural gas leakage.

[0048] Until the spring 4 610 drives the sliding upper and lower blocks 611 downward to contact the limit clamping block 76 and retract into the long strip block 73, the long strip block 73 is retracted into the hollow block 71 under the action of the spring 5 72, until the spring 7 79 drives the blocking disc 710 to contact the sealing gasket 2 77 tightly, which plays the role of cutting off the gas supply when a gas leak is detected. The whole mechanism responds quickly to cut off the gas supply and prevent potential dangers. This automatic response design greatly improves the safety of the gas meter 1, and even if there is a small gas leak, it will push the guide block 64 over a long period of time, triggering the subsequent gas leak reminder and cut-off function.

[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A gas meter with a gas leakage detection function, comprising a gas meter (1), characterized in that: The top of the gas meter (1) is provided with an air inlet pipe (2), the top of the gas meter (1) is provided with an air outlet pipe (3), and the air inlet pipe (2) and the air outlet pipe (3) are respectively provided with a fastening mechanism (4), a sealing mechanism (5), a prompting mechanism (6) and a protective closing mechanism (7); The fastening mechanism (4) is used to stabilize the connection position between the air inlet pipe (2) and the air outlet pipe (3); The sealing mechanism (5) is used to perform secondary sealing on the leaked gas; The prompting mechanism (6) is used to give a warning when a gas leak occurs; The protective closing mechanism (7) is used for blocking gas leakage.

2. A gas meter with a gas leakage detection function according to claim 1, characterized in that: The fastening mechanism (4) comprises an inlet connecting pipe (41), the inlet connecting pipe (41) is fixedly connected to the top of the gas meter (1), a receiving plate (42) is fixedly connected to the inlet connecting pipe (41), a fastening nut (43) is rotatably connected to the outer wall of the inlet pipe (2), a ferrule (44) is rotatably connected to the outer wall of the fastening nut (43), a sealing gasket (45) is fixedly connected to the top of the inlet connecting pipe (41), one end of a spring (46) is fixedly connected to the inner wall of the fastening nut (43), the other end of the spring (46) is fixedly connected to a trapezoidal block (47), and a limiting transmission plate (48) is fixedly connected to the inner wall of the ferrule (44).

3. A gas meter with a gas leakage detection function according to claim 2, characterized in that: The outer wall of the trapezoidal block (47) is slidably connected to the inner wall of the fastening nut member (43), and the limiting transmission plates (48) are arranged in a circular array on the inner wall of the ring member (44).

4. A gas meter with a gas leakage detection function according to claim 2, characterized in that: The sealing mechanism (5) comprises a sealing cavity (51), the sealing cavity (51) is provided on the inner wall of the ferrule (44), a bottom cavity (52) is provided on the inner wall of the ferrule (44), a connecting pipe (53) is fixedly connected to the inner wall of the ferrule (44), one end of the connecting pipe (53) is fixedly connected to an upper annular sealing airbag (54), the other end of the connecting pipe (53) is fixedly connected to a lower annular sealing airbag (55), the outer wall of the connecting pipe (53) is fixedly connected to an input pipe (56), and the top of the lower annular sealing airbag (55) is fixedly connected to a one-way The one-way tube (57) is fixedly connected to a fixed support plate (58) on the inner wall of the one-way tube (57), a circular ring member (514) is fixedly connected to the inner wall of the one-way tube (57), one end of a spring 2 (512) is fixedly connected to the top of the fixed support plate (58), the other end of the spring 2 (512) is fixedly connected to an airway blocking member (513), a piston is connected to a piston ring member (59) on the inner wall of the sealing cavity (51), a vertical guide rod (510) is fixedly connected to the bottom of the piston ring member (59), and a ball (511) is rotatably connected to the bottom of the vertical guide rod (510).

5. A gas meter with a gas leakage detection function according to claim 4, characterized in that: The outer wall of the one-way tube (57) is fixedly connected to the inner wall of the ring member (44), a through hole is opened on the surface of the circular ring member (514), and the outer wall of the vertical guide rod (510) is slidably connected to the inner wall of the ring member (44).

6. A gas meter with a gas leakage detection function according to claim 4, characterized in that: The prompt mechanism (6) comprises an inlet (61), the inlet (61) is provided at the top of the receiving plate (42), a connecting cavity (62) is provided on the inner wall of the receiving plate (42), the inlet (61) enables the connecting cavity (62) and the top to communicate with each other, one end of a spring three (63) is fixedly connected to the inner wall of the connecting cavity (62), the other end of the spring three (63) is fixedly connected to a guide block (64), and one end of a telescopic tube (65) is fixedly connected to the outer wall of the guide block (64). The other end of the telescopic tube (65) is fixedly connected to the outer wall of the fixed square block (66), the outer wall of the guide block (64) is fixedly connected to the fixed top plate (67), the inner wall of the connecting cavity (62) is fixedly connected to the limit plates (68) on both sides, the outer wall of the fixed top plate (67) is fixedly connected to the cylindrical guide rod (69), the bottom of the fixed top plate (67) is fixedly connected to one end of a spring four (610), and the other end of the spring four (610) is fixedly connected to the sliding upper and lower blocks (611).

7. A gas meter with a gas leakage detection function according to claim 6, characterized in that: The guide block (64) is slidably connected to the inner wall of the connecting cavity (62), the outer wall of the fixed square block (66) is fixedly connected to the inner wall of the connecting cavity (62), a through hole is opened on the surface of the fixed square block (66), the outer wall of the cylindrical guide rod (69) is slidably connected to the inner wall of the receiving plate (42), and the outer wall of the sliding upper and lower blocks (611) is slidably connected to the inner wall of the guide block (64).

8. A gas meter with a gas leakage detection function according to claim 7, characterized in that: The protective closing mechanism (7) comprises a hollow block (71), wherein the hollow block (71) is fixedly connected to the bottom of the receiving plate (42), one end of a spring five (72) is fixedly connected to the inner wall of the hollow block (71), the other end of the spring five (72) is fixedly connected to a long strip block (73), the outer wall of the long strip block (73) is fixedly connected to a connecting handle (74), one end of a spring six (75) is fixedly connected to the inner wall of the long strip block (73), the other end of the spring six (75) is fixedly connected to a limited position clamping block (76), a sealing gasket two (77) is fixedly connected to the inner wall of the hollow block (71), a through hole (78) is provided on the inner wall of the hollow block (71), one end of a spring seven (79) is fixedly connected to the inner wall of the long strip block (73), the other end of the spring seven (79) is fixedly connected to a blocking disc (710).

9. A gas meter with a gas leakage detection function according to claim 8, characterized in that: The outer wall of the long strip block (73) is piston-connected to the inner wall of the hollow block (71); the outer wall of the limit clamping block (76) is slidably connected to the inner wall of the long strip block (73); the outer wall of the blocking disc (710) is piston-connected to the inner wall of the long strip block (73); and the bottom of the blocking disc (710) is provided with an arc chamfer.

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