Negative pressure wave positioning detection device for gas pipeline leakage

Abstract

The utility model discloses a gas pipeline leakage negative pressure wave positioning detection device, and relates to the technical field of gas pipeline leakage negative pressure wave positioning detection. The gas pipeline comprises a gas pipeline body and a pressure sensor, branch pipes are symmetrically and fixedly arranged at the two ends of the gas pipeline body, a mounting plate is fixedly sleeved at the upper ends of the branch pipes, a hand valve is fixedly sleeved on the branch pipes below the mounting plate, and a sealing gasket is fixedly connected with the top of the mounting plate. According to the utility model, the pressure sensor is tightly pressed on the mounting plate, the mounting rack is abutted against the sealing gasket, and the blocking arm is clamped into the blocking groove arranged on the fixing bolt under the elastic force action of the metal elastic sheet, so that the pressure sensor can be quickly mounted and fixed at the upper end of the branch pipe, and the pressure sensor can be quickly fixed at the upper end of the branch pipe by shifting the blocking arm. And the blocking arm is moved out of the blocking groove, so that the pressure sensor can be quickly dismounted, and the pressure sensor can be more conveniently mounted and dismounted.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas pipeline leakage negative pressure wave positioning detection, and particularly relates to a gas pipeline leakage negative pressure wave positioning detection device. Background Technique

[0002] When a sudden leakage occurs at a certain place on the pipeline, a transient pressure drop will be generated at the leakage point, and this negative pressure fluctuation propagates from the leakage point to both ends at a certain speed; the upstream and downstream pressure sensors capture the waveforms of specific transient pressures, judge the leakage point, and obtain the leakage point position through the reception time difference. After retrieval, the patent with the application number 202223384261.7 discloses a gas pipeline leakage negative pressure wave positioning detection device, which includes a gas pipeline, a first data processing unit and a second data processing unit with the same structure located outside the gas pipeline, and a first air duct and a second air duct arranged outside the gas pipeline. The inner thread of the top of the first air duct is sleeved with a first manual valve, the inner thread of the top of the second air duct is sleeved with a second manual valve, and the inner thread of the top of the first manual valve is sleeved with a first pressure sensor electrically connected with the first data processing unit.

[0003] However, during the actual use process, the applicant found that by setting an annular groove on the outer side of the top of the external thread sleeve to store the sealing grease through the annular groove to prevent rust from occurring at the thread, this connection method is still difficult to quickly disassemble the pressure sensor after the sealing grease becomes dry and hard. In view of this, we propose a gas pipeline leakage negative pressure wave positioning detection device. Content of the Utility Model

[0004] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0005] The utility model is a gas pipeline leakage negative pressure wave positioning detection device, which includes a gas pipeline body and a pressure sensor. The two ends of the gas pipeline body are symmetrically and fixedly provided with branch pipes. The upper ends of the branch pipes are sleeved and fixed with mounting plates. A manual valve is sleeved and fixed on the branch pipes below the mounting plates. The top of the mounting plate is fixedly connected with a sealing gasket. The bottom of the mounting plate is symmetrically and rotatably connected with rotating shafts through bearings. A blocking arm is sleeved and fixed on the rotating shafts. The blocking arm is elastically connected with the mounting plate through a metal elastic sheet. The lower part of the pressure sensor is sleeved and fixed with a mounting frame. The bottom of the mounting frame abuts against the sealing gasket. The bottom of the mounting frame is symmetrically and fixedly connected with fixing pins. The lower ends of the fixing pins movably penetrate through the mounting plate, and blocking grooves are formed on the side walls of the lower ends of the fixing pins. The blocking arms are stuck in the blocking grooves.

[0006] Preferably, the lower end of the fixing pin is provided with a rounded corner part.

[0007] Preferably, the blocking arm is provided with an inclined portion.

[0008] Preferably, a limiting block is symmetrically fixedly provided on the bottom of the mounting plate, and a side of the blocking arm away from the metal spring is in contact with the limiting block.

[0009] Preferably, the top of the mounting plate is symmetrically provided with mounting holes, the two fixing pins are movably inserted through the two mounting holes respectively, and the pressure sensor is electrically connected to the external data processing unit via a wire.

[0010] Preferably, both ends of the mounting plate are bent downward and provided with a bending portion, one end of the metal spring sheet is fixedly connected to the side wall of the blocking arm, and the other end of the metal spring sheet is fixedly connected to the inner side wall of the bending portion adjacent to the blocking arm.

[0011] The utility model has the following beneficial effects:

[0012] The utility model discloses a gas pipeline leakage negative pressure wave positioning detection device, which can quickly install and fix the pressure sensor on the upper end of the branch pipe by pressing the pressure sensor on the mounting plate, making the mounting frame abut against the sealing gasket, and making the blocking arm, under the elastic force of the metal spring sheet, be stuck in the blocking groove formed on the fixing pin, and can quickly remove the pressure sensor by toggling the blocking arm to move the blocking arm out of the blocking groove, so that the installation and removal of the pressure sensor can be more convenient, and by arranging a rounded corner portion at the lower end of the fixing pin and providing an inclined portion on the blocking arm, the blocking arm can be automatically pushed open by the cooperation of the rounded corner portion and the inclined portion during the process of inserting the fixing pin into the mounting hole, without the need for personnel to manually push the blocking arm open, so that the installation of the pressure sensor can be more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 This is a schematic diagram of the overall structure of a negative pressure wave positioning detection device for gas pipeline leakage according to the utility model;

[0015] Figure 2 This is a partial structural schematic diagram of a gas pipeline leakage negative pressure wave positioning detection device of the utility model after the pressure sensor is removed;

[0016] Figure 3The following is a schematic bottom view structure of the mounting plate in a negative pressure wave positioning detection device for gas pipeline leakage of the present utility model;

[0017] Figure 4 The following is a schematic structure diagram of a pressure sensor in a negative pressure wave positioning detection device for gas pipeline leakage of the present utility model.

[0018] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0019] 1. Gas pipeline body; 2. Branch pipe; 3. Manual valve; 4. Mounting plate; 41. Mounting hole; 42. Bending part; 43. Limiting block; 5. Pressure sensor; 6. Sealing gasket; 7. Rotating shaft; 8. Blocking arm; 81. Inclined surface part; 9. Metal elastic sheet; 10. Mounting frame; 11. Fixed bolt; 111. Blocking groove; 112. Rounded corner part. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] Please refer to Figures 1-4 As shown, the present utility model provides a technical solution:

[0022] A gas pipeline leakage negative pressure wave positioning detection device comprises a gas pipeline body 1 and a pressure sensor 5, wherein branch pipes 2 are symmetrically fixedly arranged at both ends of the gas pipeline body 1, a mounting plate 4 is sleeved and fixed at the upper end of the branch pipe 2, a hand valve 3 is sleeved and fixed on the branch pipe 2 below the mounting plate 4, a sealing gasket 6 is fixedly connected to the top of the mounting plate 4, a rotating shaft 7 is symmetrically rotatably connected to the bottom of the mounting plate 4 through a bearing, a blocking arm 8 is sleeved and fixed on the rotating shaft 7, the blocking arm 8 is elastically connected to the mounting plate 4 through a metal spring 9, both ends of the mounting plate 4 are bent downward and provided with a bending portion 42, one end of the metal spring 9 is fixedly connected to the side wall of the blocking arm 8, and the other end of the metal spring 9 is fixedly connected to the inner wall of the bending portion 42 adjacent to the blocking arm 8, and the pressure sensor 5 is provided with a pressure sensor 5. The lower part of the sensor 5 is sleeved and fixed with a mounting frame 10, the bottom of the mounting frame 10 abuts against the sealing gasket 6, the bottom of the mounting frame 10 is symmetrically fixedly connected with a fixing pin 11, the lower end of the fixing pin 11 movably penetrates the mounting plate 4, and a blocking groove 111 is provided on the side wall of the lower end of the fixing pin 11, and the top of the mounting plate 4 is symmetrically provided with mounting holes 41, and two fixing pins 11 movably penetrate the two mounting holes 41 respectively, the pressure sensor 5 is electrically connected to the external data processing unit through a wire, and the blocking arm 8 is stuck in the blocking groove 111. By pressing the pressure sensor 5 against the mounting plate 4, the mounting frame 10 abuts against the sealing gasket 6, and the blocking arm 8 is stuck in the blocking groove 111 provided on the fixing pin 11 under the elastic force of the metal spring sheet 9. In the groove 111, the pressure sensor 5 can be quickly installed and fixed on the upper end of the branch pipe 2, and the blocking arm 8 can be moved out of the blocking groove 111 by toggling the blocking arm 8, so that the pressure sensor 5 can be quickly disassembled, making the installation and disassembly of the pressure sensor 5 more convenient. When in use, when a sudden leak occurs somewhere on the gas pipeline body 1, a transient pressure drop will occur at the leak. This negative pressure fluctuation propagates from the leak point to both ends at a certain speed. At this time, the two pressure sensors 5 can capture the waveform of the specific transient pressure, judge the leak point, and obtain the location of the leak point through the receiving time difference. The information can be transmitted to the computer terminal through the external data processing unit, so as to notify the personnel to carry out maintenance. When the pressure sensor 5 is disassembled for inspection and repair, the hand valve 3 on the branch pipe 2 where the pressure sensor 5 is located can be manually closed, and then the two blocking arms 8 below the pressure sensor 5 can be manually pushed outward to move the blocking arms 8 away from the blocking grooves 111, and the pressure sensor 5 can be removed from the mounting plate 4. The metal spring pieces 9 can be compressed by pushing the blocking arms 8 outward to move the blocking arms 8 away from under the mounting hole 41, and the fixing pins 11 can be passed through the mounting hole 41, and the mounting frame 10 can be pressed against the sealing gasket 6 with force, and then the blocking arms 8 can be released. At this time, under the elastic force of the metal spring pieces 9, the blocking arms 8 can be driven to automatically fit into the blocking grooves 111, and the fixing pins 11 can be locked, so that the pressure sensor 5 can be quickly installed.

[0023] The lower end of the fixed pin 11 is provided with a rounded corner portion 112, and the blocking arm 8 is provided with an inclined portion 81. The bottom of the mounting plate 4 is symmetrically fixed with a limit block 43 for limiting the blocking arm 8, so that when the fixed pin 11 is inserted into the mounting hole 41, the blocking arm 8 can be pushed open from the bottom of the mounting hole 41 through the cooperation of the rounded corner portion 112 and the inclined portion 81. By providing the rounded corner portion 112 at the lower end of the fixed pin 11 and providing the inclined portion 81 on the blocking arm 8, the fixed pin 11 can be inserted into the mounting hole 41. During the installation process of the hole 41, the blocking arm 8 is automatically pushed open through the cooperation of the rounded corner portion 112 and the inclined portion 81, and there is no need for personnel to manually push the blocking arm 8 open, so that the installation of the pressure sensor 5 can be more convenient. The side of the blocking arm 8 away from the metal spring 9 abuts against the limit block 43. When the pressure sensor 5 is installed, the blocking arm 8 can also be automatically pushed open from the lower end of the installation hole 41 through the cooperation of the rounded corner portion 112 and the inclined portion 81, so that there is no need for personnel to manually push the blocking arm 8 open, which is more convenient.

[0024] Working principle: During use, when a sudden leak occurs somewhere on the gas pipeline body 1, a transient pressure drop will occur at the leak. This negative pressure fluctuation propagates from the leak point to both ends at a certain speed. At this time, the two pressure sensors 5 can capture the waveform of the specific transient pressure, make a leak point judgment, and obtain the location of the leak point by receiving the time difference. The information can be transmitted to the computer terminal through an external data processing unit, so as to notify the personnel to carry out maintenance. When the pressure sensor 5 is disassembled for maintenance, the hand valve 3 on the branch pipe 2 where the pressure sensor 5 is located can be manually closed, and then the two blocking arms 8 under the pressure sensor 5 can be manually pushed outward to remove the blocking arms 8 from the blocking groove 111, and the pressure sensor 5 can be removed. The sensor 5 is removed from the mounting plate 4, and the metal spring 9 is compressed by pushing the blocking arm 8 outward, so that the blocking arm 8 is moved away from the bottom of the mounting hole 41, and the fixing pin 11 is passed through the mounting hole 41, and the mounting frame 10 is pressed against the sealing gasket 6 with force, and then the blocking arm 8 is released. At this time, under the elastic force of the metal spring 9, the blocking arm 8 can be driven to automatically snap into the blocking groove 111, and the fixing pin 11 is locked, so that the pressure sensor 5 can be quickly installed. When installing the pressure sensor 5, the blocking arm 8 can also be automatically pushed open from the lower end of the mounting hole 41 through the cooperation of the rounded corner portion 112 and the inclined portion 81, so that there is no need for personnel to manually push open the blocking arm 8, which is more convenient.

[0025] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0026] The above are only the preferred embodiments of the present utility model and do not limit the present utility model. Any modification of the technical solutions recorded in the foregoing embodiments and any equivalent replacement of some of the technical features thereof all fall within the protection scope of the present utility model.

Claims

1. A gas pipeline leakage negative pressure wave positioning detection device, comprising a gas pipeline body (1) and a pressure sensor (5), characterized in that: Branch pipes (2) are symmetrically fixedly arranged at both ends of the gas pipeline body (1); a mounting plate (4) is sleeved and fixedly arranged on the upper end of the branch pipe (2); a hand valve (3) is sleeved and fixedly arranged on the branch pipe (2) below the mounting plate (4); a sealing gasket (6) is fixedly connected to the top of the mounting plate (4); a rotating shaft (7) is symmetrically rotatably connected to the bottom of the mounting plate (4) via a bearing; a blocking arm (8) is sleeved and fixedly arranged on the rotating shaft (7); the blocking arm (8) is sleeved and fixedly arranged via a metal spring ( 9) is elastically connected to the mounting plate (4), the lower part of the pressure sensor (5) is sleeved and fixed with a mounting frame (10), the bottom of the mounting frame (10) abuts against the sealing gasket (6), the bottom of the mounting frame (10) is symmetrically fixedly connected with a fixing pin (11), the lower end of the fixing pin (11) movably passes through the mounting plate (4), and a blocking groove (111) is opened on the side wall of the lower end of the fixing pin (11), and the blocking arm (8) is stuck in the blocking groove (111).

2. A gas pipeline leakage negative pressure wave positioning detection device according to claim 1, characterized in that: The lower end of the fixing pin (11) is provided with a rounded corner portion (112).

3. A gas pipeline leakage negative pressure wave positioning detection device according to claim 2, characterized in that: The blocking arm (8) is provided with an inclined portion (81).

4. A gas pipeline leakage negative pressure wave positioning detection device according to claim 3, characterized in that: A limiting block (43) is symmetrically fixedly arranged at the bottom of the mounting plate (4), and a side of the blocking arm (8) away from the metal spring (9) abuts against the limiting block (43).

5. A gas pipeline leakage negative pressure wave positioning detection device according to claim 1, characterized in that: The top of the mounting plate (4) is symmetrically provided with mounting holes (41), the two fixing pins (11) are respectively movably inserted through the two mounting holes (41), and the pressure sensor (5) is electrically connected to an external data processing unit via a wire.

6. A gas pipeline leakage negative pressure wave positioning detection device according to claim 1, characterized in that: Both ends of the mounting plate (4) are bent downward and provided with a bent portion (42); one end of the metal spring (9) is fixedly connected to the side wall of the blocking arm (8); and the other end of the metal spring (9) is fixedly connected to the inner side wall of the bent portion (42) adjacent to the blocking arm (8).

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