Isolating valve leakage detection early warning device

Abstract

The utility model relates to leakage detection, in particular to an isolating valve leakage detection early warning device. Comprising an isolating valve leakage detection early warning device installed on one side of an isolating device. The isolating valve leakage detection early warning device comprises a normal pressure cabin used for maintaining the internal pressure; and one side of the normal-pressure cabin is connected with the isolating device, and the other side of the normal-pressure cabin is provided with an isolating valve. The normal-pressure cabin can adopt a horizontally arranged pipeline. And the top of the normal-pressure cabin is connected with a communicating pipe section. One end of the communicating pipe section is communicated with the normal-pressure cabin, and the other end of the communicating pipe section is provided with a Burming whistle which is used for generating sound with specific frequency as leakage indication. And a needle valve for adjusting the air flow is arranged on the communicating pipe section. And a sound amplifying cover is arranged at the output end of the Bernoun whistle and is used for amplifying sound for warning. On the premise of not interfering the functions of the original isolation device, the leakage of the isolation device is detected and early warned in a simple, reliable and efficient manner.

Description

TECHNICAL FIELD

[0001] The utility model relates to leak detection, especially a cut-off valve leak detection early warning device. BACKGROUND

[0002] A variety of energy media is used in the production process of a steel plant, and the effective cut-off of these energy media is directly related to production and life safety. The detection methods for the micro-leakage of power gas in a steel plant mainly fall into two categories: one is to determine whether there is leakage based on the experience judgment of pressure and flow changes; the other is to use automatic instruments to monitor pressure and composition in real time. The accuracy of the former is affected by the experience and skill level of the operator, and the reliability is low; while the latter has high accuracy, but due to high initial investment cost and various interference factors, its application also faces certain challenges.

[0003] At present, the main detection and early warning technology for power gas leakage in the steel industry generally uses automatic means, and in actual operation, it relies on manual inspection of portable detection instruments. When an anomaly is detected, the device alarms to remind the staff. The effect of this detection method not only depends on the accuracy of the instrument itself, but also is closely related to the professional skills of the operator. However, this method still has many interference factors, and the overall investment cost is not small. Therefore, a simple and reliable device is needed to detect the leakage of power gas and issue an alarm in time. SUMMARY

[0004] The utility model provides a cut-off valve leak detection early warning device aiming at the defects existing in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme, a cut-off valve leak detection early warning device, comprising: a cut-off valve leak detection early warning device installed on one side of a (original) cut-off device; the cut-off valve leak detection early warning device comprises a normal pressure cabin for maintaining the internal pressure; one side of the normal pressure cabin is connected with the cut-off device, and the other side of the normal pressure cabin is provided with a cut-off valve. The normal pressure cabin can adopt a horizontally arranged pipeline.

[0006] The top of the normal pressure cabin is connected with a communication pipe section; the communication pipe section is used for transmitting airflow.

[0007] One end of the communication pipe section is connected with the normal pressure cabin, and the other end of the communication pipe section is provided with a Birmingham whistle for generating a specific frequency sound as a leakage indication.

[0008] A needle valve for adjusting the size of airflow is arranged on the communication pipe section.

[0009] The output end of the Birmingham whistle is provided with a sound amplification cover for amplifying the sound to warn.

[0010] Further, the (original) partition device is used for partitioning and flowing of the energy medium pipeline.

[0011] Further, the partition device adopts a on-off valve.

[0012] Further, the normal pressure cabin is connected with the partition device through a first flange.

[0013] Further, the communication pipe section is connected with the normal pressure cabin through a second flange.

[0014] Further, the normal pressure cabin is internally provided with a pressure monitoring component for monitoring the pressure change in the cabin.

[0015] Further, the communication pipe section is a flexible pipe section, which can adapt to different installation positions and angles and ensure smooth airflow.

[0016] Further, the first flange is sealed by a sealing material, so as to ensure that the connection between the normal pressure cabin and the partition device is leakproof.

[0017] Further, the needle valve has two adjustment modes, i.e., a manual mode and an automatic mode, in the manual mode, the needle valve is adjusted by a knob, and in the automatic mode, the needle valve is adjusted by a control unit.

[0018] Further, the sound amplifier cover adopts a semicircular structure or a horn barrel structure, and the end with a smaller width is installed outside the output end of the Birmingham whistle.

[0019] Compared with the prior art, the utility model has beneficial effects.

[0020] The utility model can detect and warn the leakage of the partition device in a simple, reliable and efficient manner without interfering with the function of the original partition device. Specifically, the scheme uses a needle valve and a Birmingham whistle to detect whether the partition device has a small leakage, which has the advantages of low cost, convenient operation and wide warning coverage. In addition, the device can accurately judge whether there is a leakage at the double partition position, thereby effectively reducing the waste of power gas. BRIEF DESCRIPTION OF DRAWINGS

[0021] The utility model will be further described below in combination with the drawings and specific embodiments. The protection scope of the utility model is not limited to the following content.

[0022] Figure 1 is the schematic view of the installation of the partition valve leakage detection and warning device on the horizontal pipeline.

[0023] Figure 2 is the schematic view of the installation of the partition valve leakage detection and warning device on the vertical pipeline.

[0024] In the figure, 1. normal pressure cabin, 2. isolation valve, 3. connecting pipe section, 4. needle valve, 5. sound amplification cover, 6. Birmingham whistle, 7. isolation device, 8. first flange, 9. elbow joint, 10. switch valve, 11. pressure detector, 12. water outlet pipe, 13. on-off valve. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and beneficial effects of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the drawings 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.

[0026] like Figures 1-2 As shown, the utility model includes a partition valve leakage detection and warning device installed on one side of the partition device 7; when installed in a vertical pipeline, as shown in FIG. Figure 2 , use elbow joints for transition.

[0027] The isolation valve leakage detection and warning device includes a normal pressure chamber 1 for maintaining internal pressure. The normal pressure chamber 1 can be constructed using a horizontal pipe structure. One side of the normal pressure chamber 1 is connected to the isolation device 7, and the other side of the normal pressure chamber 1 is provided with an isolation valve 2. The normal pressure chamber 1 and the isolation device 7 are connected via a first flange. The first flange 8 is sealed with a sealing material to ensure a leak-free connection between the normal pressure chamber 1 and the isolation device 7.

[0028] The top of the atmospheric chamber 1 is connected to a connecting pipe section 3, which can be a flexible pipe section. This connecting pipe section 3 is used to transmit airflow. One end of the connecting pipe section 3 is connected to the atmospheric chamber 1, and the other end of the connecting pipe section 3 is equipped with a Birmingham whistle 6, which produces a sound of a specific frequency as a leak indicator. The top end of the connecting pipe section 3 is connected to the atmospheric chamber 1 via a second flange.

[0029] The connecting pipe section 3 is provided with a needle valve 4 for adjusting the size of the airflow; the needle valve 4 has two adjustment modes, manual and automatic. In the manual mode, it can be adjusted by a knob, and in the automatic mode, it can be adjusted by a control unit.

[0030] The output end of the Birmingham whistle 6 is provided with a sound amplifying cover 5 for amplifying the sound to warn. The sound amplifying cover 5 adopts a semicircular structure or a trumpet structure.

[0031] The isolation device 7 adopts an on-off valve, and the isolation device 7 is used for the isolation and flow of the energy medium pipeline.

[0032] Example 1, atmospheric cabin: airtight container for maintaining the internal pressure. The atmospheric cabin is provided with a pressure monitoring component for monitoring the pressure changes inside the cabin. The pressure monitoring component can be a pressure sensor or a pressure detector connected to the atmospheric cabin through a pipeline, and a switch valve is provided on the pipeline.

[0033] Example 2, connection instructions for the Birmingham whistle: the inlet end of the Birmingham whistle is provided with external threads, while the end of the connecting pipe section has a corresponding internal thread. By rotating the Birmingham whistle, it is tightly connected with the connecting pipe section. Align the inlet end of the Birmingham whistle with the end of the connecting pipe section, and gently rotate the Birmingham whistle until it is completely tightened. Use a wrench to further tighten and ensure a secure connection.

[0034] Example 3, the atmospheric cabin is provided with a pressure sensor inside for real-time monitoring of the pressure changes inside the cabin. The needle valve has both manual and automatic adjustment modes, with manual adjustment by rotating the knob and automatic adjustment by the control unit.

[0035] Example 4, installation steps:

[0036] S1, fix the atmospheric cabin in the predetermined position.

[0037] S2, install the partition valve at the end of the atmospheric cabin.

[0038] S3, connect one end of the connecting pipe section to the atmospheric cabin through the flange.

[0039] S4, install the needle valve and adjust it to the initial position.

[0040] S5, install the Birmingham whistle at the end of the connecting pipe section.

[0041] S6, connect the sound cover to the output end of the Birmingham whistle.

[0042] S7, connect the atmospheric cabin to the partition device through the flange.

[0043] S8, install the display panel and connect it to the pressure sensor and control unit.

[0044] Example 5, a water outlet pipe 12 is provided below the atmospheric cabin and connected to it, and a on-off valve 13 is provided on the water outlet pipe 12. The pipe connected to the front end of the original partition device and containing energy medium cannot be completely filtered of air and water vapor, so there is often water accumulation in the gas pipeline. In the case of frequent operation of the partition device, long-term accumulation can cause water to enter the atmospheric cabin 1, so after a period of operation of the device, the long-term accumulated water in the atmospheric cabin 1 needs to be drained through the water outlet pipe.

[0045] The working principle of the leak detection and early warning device of the isolation valve is that a micro-leak detection and early warning device is added to one side of the original isolation device. The device is composed of a normal pressure cabin 1, an isolation valve 2, a needle valve 4, and a Birmingham whistle 6. The device realizes the switching between the normal state and the detection and early warning state. The valve and the isolation device 7 are connected through a pipeline, and the pipeline segment is the normal pressure cabin 1. A φ10 needle valve is installed on the pipeline wall, and a Birmingham whistle that can sense micro air flow is connected behind the needle valve 4. The switching between the communication state and the micro-leak detection state is realized through the position switching of the valve and the needle valve. Thus, the micro-leak detection and early warning function of the power gas is realized.

[0046] The leak detection and early warning device of the isolation valve is connected with the isolation device 7 through a flange 8. The isolation valve 2 is opened, the needle valve 4 is closed, the isolation device 7 is opened through the connection of the normal pressure cabin 1 and the isolation valve 2, and the flow-through function of the isolation device 7 can be realized. The isolation valve 2 is closed, the needle valve 4 is opened, and the isolation device 7 is closed, so that the isolation function of the isolation device 7 can be realized, and the detection and early warning function is realized at the same time.

[0047] If the isolation device 7 does not exist leakage, the normal pressure cabin 1 always maintains normal pressure, no air flow passes through the communication pipe segment 3, the needle valve 4, and the Birmingham whistle 6, and no air flow and alarm will be detected. If the isolation device 7 exists leakage, the pressure in the normal pressure cabin 1 rises, and air flow will pass through the communication pipe segment 3, the needle valve 4, and the Birmingham whistle 6, so that air flow and alarm will be detected. The decibel of the Birmingham whistle 6 is improved through the sound amplifier 5, which prompts the operator that there is a small leakage or leakage at this place.

[0048] The above examples are only used to illustrate the technical solutions of the present application, but not to limit them. Although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified, or some or all of the technical features can be replaced by equivalents. Therefore, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope defined by the claims of the present application.

Claims

1. A barrier valve leak detection early warning device, comprising: The utility model discloses a partition valve leakage detection early warning device installed on one side of a partition device (7), characterized in that the partition valve leakage detection early warning device comprises a constant pressure cabin (1) for maintaining internal pressure; one side of the constant pressure cabin (1) is connected with the partition device (7), and the other side of the constant pressure cabin (1) is provided with a partition valve (2); The top of the constant pressure cabin (1) is connected with a communication pipe section (3); the communication pipe section (3) is used for transmitting airflow; One end of the communication pipe section (3) is connected with the constant pressure cabin (1), and the other end of the communication pipe section (3) is provided with a Birmingham whistle (6) for generating sound as a leakage indication; the communication pipe section (3) is provided with a needle valve (4) for adjusting the size of airflow; The output end of the Birmingham whistle (6) is provided with a sound amplification cover (5) for amplifying sound to warn.

2. The barrier valve leak detection early warning device of claim 1, wherein, The partition device (7) is used for partitioning and flowing of energy medium pipelines.

3. The barrier valve leak detection early warning device of claim 1, wherein, The partition device (7) adopts an on-off valve.

4. The barrier valve leak detection early warning device of claim 1, wherein, The constant pressure cabin (1) is connected with the partition device (7) through a first flange (8).

5. The barrier valve leak detection early warning device of claim 1, wherein, The communication pipe section (3) is connected with the constant pressure cabin (1) through a second flange.

6. The barrier valve leak detection warning device of any one of claims 1 to 5, wherein, The constant pressure cabin (1) is provided with a pressure monitoring component for monitoring pressure change in the cabin.

7. The barrier valve leak detection warning device of any one of claims 1 to 5, wherein, The communication pipe section (3) is a flexible pipe section.

8. The barrier valve leak detection early warning device of claim 4, wherein, The first flange (8) is sealed with sealing material to ensure that the connection between the constant pressure cabin (1) and the partition device (7) is leakproof.

9. The barrier valve leak detection early warning device of claim 6, wherein, The needle valve (4) has two adjustment modes, namely manual and automatic.

10. The barrier valve leak detection early warning device of claim 6, wherein, The sound amplification cover (5) adopts a semicircular structure or a horn barrel structure.

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