A leak detection device

Abstract

This utility model provides a leak detection device, relating to the field of pulse valves. The leak detection device includes a connector, a rocker arm, and a detection element. The rocker arm is rotatably connected to the connector, with its first end extending into the interior of a pipe and its second end located outside the connector. The detection element is connected to the first end of the rocker arm. When it is necessary to detect whether the internal diaphragm of a pulse jet device is damaged, the connector of the leak detection device is sealed to the pipe, and then airflow is supplied to the pipe. The airflow causes the detection element at the first end of the rocker arm to move. When the gas pressure inside the pipe reaches a certain value, the external airflow is shut off. At this time, it can be observed whether the second end of the rocker arm stops moving. When the first and second ends of the rocker arm are in equilibrium, it indicates that the internal diaphragm is intact; otherwise, the internal diaphragm is damaged. This leak detection device is not only intuitive and fast but also extremely convenient to operate.

Description

Technical Field

[0001] This utility model relates to the field of pulse valves, and more specifically, to a leak detection device. Background Technology

[0002] Pulse jet cleaning systems are commonly used in dust collectors. After prolonged operation, the internal diaphragm of these systems is prone to damage, leading to continuous internal leakage of compressed air within the pipeline and resulting in energy waste. A large dust collector typically uses a single air source connected to multiple pulse jet cleaning systems, making it difficult to locate internal diaphragm leaks.

[0003] Currently, the method for locating internal leaks caused by ruptured internal diaphragms in pulse jet devices is to use an external flow monitoring system, which is complex to operate and extremely inconvenient to detect. Utility Model Content

[0004] This invention provides a leak detection device that can intuitively detect whether the diaphragm inside the pulse jet device is damaged. It is simple and convenient to operate.

[0005] The embodiments of this utility model can be implemented as follows: An embodiment of this utility model provides a leak detection device, which includes: Connectors are used for sealing connections with pipes; A rocker arm is rotatably connected to a connector, with a first end extending into the interior of the pipe and a second end located outside the connector. The detection component is connected to the first end of the pendulum rod, and the detection component and the first end of the pendulum rod are in a balanced state with the second end of the pendulum rod.

[0006] Optionally, the connector includes a rotating ball and two concave flanges, the two concave flanges having concave arc surfaces, the rotating ball being rotatably disposed between the two concave arc surfaces, and the rocker arm being connected to the rotating ball.

[0007] Optionally, the rotating ball is sealed to the concave arc surface.

[0008] Optionally, the concave arc surface is provided with a lubricating layer, which slides in contact with the surface of the rotating ball.

[0009] Optionally, one of the two concave flanges is connected to a bracket, on which a distance sensor is arranged, capable of detecting the distance between the second end of the lever and the distance sensor.

[0010] Optionally, a reset component is arranged on the bracket, with its two ends connected to the bracket and the second end of the swing arm, respectively.

[0011] Optionally, a constraint channel is provided on the concave flange, and the rocker arm swings along the constraint channel.

[0012] Optionally, the orientation of the constraint channel is consistent with the direction of fluid flow within the pipe.

[0013] Optionally, the outer covers of the two concave flanges are equipped with dust covers, and the rotating ball is located inside the dust covers.

[0014] Optionally, the test piece is a hollow sphere.

[0015] The beneficial effects of this utility model embodiment: This leak detection device includes a connector, a swing arm, and a detection element. The swing arm is rotatably connected to the connector, with its first end extending into the interior of the pipe and its second end located outside the connector. The detection element is connected to the first end of the swing arm. When it is necessary to detect whether the internal diaphragm of the pulse jet device is damaged, the connector of the leak detection device is sealed to the pipe, and then airflow is supplied to the pipe. The airflow causes the detection element at the first end of the swing arm to move. When the gas pressure inside the pipe reaches a certain value, the external airflow is shut off. At this time, it can be observed whether the second end of the swing arm stops moving. When the first and second ends of the swing arm are in a balanced state, it indicates that the internal diaphragm is intact; otherwise, the internal diaphragm is damaged. This leak detection device is not only intuitive and fast but also extremely convenient to operate. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the air leakage detection device provided in the embodiments of this utility model; Figure 2 This is a schematic diagram of the connector provided in an embodiment of the present utility model; Figure 3 This is a schematic diagram of the concave flange and constraint channel provided in an embodiment of the present invention.

[0018] Icons: 1-Connector; 10-Rotating ball; 11-Concave flange; 111-Inner concave arc surface; 112-Constraint track; 113-Dust cover; 114-Connecting screw; 2-Swing arm; 3-Detection piece; 4-Bracket; 40-Distance sensor; 41-Reset piece; 5-Pipeline. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0024] The terms “comprising,” “including,” or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0025] Unless otherwise explicitly specified and limited, terms such as "setup" and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0027] Pulse jet cleaning systems are commonly used in dust collectors. Due to their high operating frequency, the internal diaphragms of these systems are prone to damage after prolonged operation, leading to continuous internal leakage of compressed air within the pipeline and resulting in energy waste. Typically, a large dust collector has multiple pulse jet cleaning systems connected to a single air source. When an internal diaphragm leaks, it is difficult to locate the leak, and the search time is long.

[0028] Currently, the method for finding internal leaks caused by ruptured internal diaphragms in pulse jet devices is to use an external flow monitoring system, such as a target-type flow switch. When the switch is activated, the internal contacts close. To observe the signal, an external circuit and control system are required, which is complex to operate and extremely inconvenient to detect.

[0029] For the reasons mentioned above, an air leakage detection device is provided in the embodiments of this utility model. This air leakage detection device can solve the above problems, and will be described in detail below.

[0030] Please refer to Figures 1 to 3 The leak detection device includes a connector 1, a swing rod 2, and a detection element 3. The connector 1 is sealed to the pipe 5. The swing rod 2 is rotatably connected to the connector 1, and the first end of the swing rod 2 extends into the interior of the pipe 5, while the second end of the swing rod 2 is located outside the connector 1. The detection element 3 is connected to the first end of the swing rod 2, and the detection element 3 and the first end of the swing rod 2 are in a balanced state with the second end of the swing rod 2.

[0031] When it is necessary to detect whether the internal diaphragm of the pulse jet device is damaged, the connector 1 of the leak detection device is sealed to the pipe 5, and then the pipe 5 is connected to the airflow. The airflow blows the detection element 3 at the first end of the swing arm 2 to move. When the gas pressure in the pipe 5 reaches a certain value, the external airflow is turned off. At this time, it can be observed whether the second end of the swing arm 2 gradually returns to the initial position and tends to a static equilibrium state. If the swing arm 2 returns to the initial position and is in a static equilibrium state after a period of time, it means that the internal diaphragm at that point is intact. If the swing arm 2 continues to swing or deviates from the initial position, it means that the internal diaphragm at that point is damaged. Using this leak detection device, it is possible to intuitively and quickly detect whether the internal diaphragm is damaged. Moreover, the operation is extremely convenient and does not require external wiring or systems.

[0032] In this embodiment, the connector 1 includes a rotating ball 10 and two concave flanges 11. Both concave flanges 11 have an inner concave arc surface 111. The two concave flanges 11 are arranged parallel and spaced apart, allowing the rotating ball 10 to be accommodated between the two inner concave arc surfaces 111. The rotating ball 10 is a solid sphere of 304 stainless steel with a precision-machined surface to ensure sufficient smoothness. The inner concave arc surfaces 111 of the two concave flanges 11 are also precision-machined to ensure sufficient smoothness. When the rotating ball 10 is accommodated between the two inner concave arc surfaces 111, the rotating ball 10 and the inner concave arc surfaces 111 are in a sealed fit and can rotate. Because both the inner concave arc surfaces 111 and the rotating ball 10 are precision-machined, the friction of the rotating ball 10 is low during rotation, which is beneficial for a sealing fit. Optionally, the concave flanges 11 can also be made of 304 stainless steel.

[0033] One of the two concave flanges 11 is provided with a mating groove located on the end face of the concave flange 11. This mating groove is adapted to the open end of the pipe 5, allowing the concave flange 11 to be connected to the pipe 5. Specifically, a mating flange is welded to the open end of the pipe 5, and the concave flange 11 with the mating groove is connected to the mating flange. A sealing ring is provided between the mating groove and the open end of the pipe 5 to achieve a sealed connection. The two concave flanges 11 are connected and fixed together by a connecting bolt 114, which is used to press and seal the rotating ball 10 while allowing it to rotate.

[0034] To ensure a tight fit between the rotating ball 10 and the concave arc surface 111, a silicone layer can be provided on the concave arc surface 111 of the two concave flanges 11. This provides both wear resistance and elasticity while ensuring a tight fit between the rotating ball 10 and the silicone layer. Of course, to allow the rotating ball 10 to rotate smoothly, a lubricating layer can be provided between the silicone layer and the rotating ball 10 to reduce the rotational resistance of the rotating ball 10. The lubricating layer can be a layer of solid grease or other lubricating material coated on the surface of the rotating ball 10.

[0035] Continue to refer to Figure 1The pendulum 2 is connected to the rotating ball 10. Specifically, the pendulum 2 is divided into two sections. The first section of the pendulum 2 is located inside the open end of the pipe 5, and the second section of the pendulum 2 is located outside the pipe 5. Both the first and second sections of the pendulum 2 are welded and fixed to the surface of the rotating ball 10. The first and second sections of the pendulum 2 are welded and fixed in a straight line and are arranged along the diameter direction of the rotating ball 10. Optionally, the pendulum 2 is made of 304 stainless steel.

[0036] A detection element 3 is welded and fixed to the first end of the swing arm 2. The detection element 3 is located in the airflow path of the pipe 5. When the pipe 5 is connected to the airflow, the airflow can blow the detection element 3 to move, thereby causing the swing arm 2 to swing. Optionally, the detection element 3 is a hollow sphere made of 304 stainless steel. A reset element 41 is connected to the second end of the swing arm 2. The reset element 41 can pull the swing arm 2 to reset. The reset element 41 can be a reset spring, and the specific elastic force of the reset spring can be selected as appropriate.

[0037] One of the two concave flanges 11 is connected to a bracket 4, which can be made of angle steel welded together. One end of the bracket 4 is welded and fixed to the outer wall of the concave flange 11. One end of a return spring is connected to the bracket 4, and the other end is connected to the second section of the swing rod 2. The return spring is used to pull the swing rod 2, causing the swing rod 2 and the detection element 3 to tend to move in the opposite direction to the airflow in the pipe 5. The receiving end of the distance sensor 40 is arranged on the bracket 4, and the transmitting end of the distance sensor 40 is arranged on the second end of the swing rod 2. When the swing rod 2 moves close to the receiving end of the distance sensor 40, the transmitting end of the distance sensor 40 emits a signal, which is received by the receiving end. The distance sensor 40 can be a commonly available ranging sensor. The specific model can be selected according to the required measurement accuracy, and is not limited here.

[0038] refer to Figure 3 To ensure that the pendulum 2 moves within a predetermined trajectory, a constraint channel 112 is provided on the concave flange 11. The second section of the pendulum 2 is confined within the constraint channel 112, and the pendulum 2 swings along the constraint channel 112. The orientation of the constraint channel 112 is consistent with the fluid flow direction in the pipe 5. For example, if the airflow direction in the pipe 5 is vertical, then the orientation of the constraint channel 112 is also vertical, and the pendulum 2 can only swing in a vertical plane. The constraint channel 112 can be formed by welding two arc-shaped steel bars side by side to the outer end face of the concave flange 11. The constraint channel 112 can make the swing of the pendulum 2 more standardized, prevent the pendulum 2 from moving randomly, and is also more conducive to detecting whether the internal diaphragm is damaged or leaking.

[0039] It is worth mentioning that the first segment of the pendulum 2 and the detection element 3 at its end are in a balanced state with the second segment of the pendulum 2 and the return spring when the internal diaphragm is intact. This balanced state means that the pendulum 2 is in a non-tilted or swinging state. For example, the first segment of the pendulum 2 and the detection element 3, the second segment of the pendulum 2 and the return spring can be in a horizontal state and stationary without the action of external force.

[0040] Optionally, the outer covers of the two concave flanges 11 are provided with dust covers 113, and the rotating ball 10 is located inside the dust cover 113. The dust cover 113 is cylindrical, and the dust cover 113 can prevent external dust from entering the surface of the rotating ball 10, which is conducive to smoother rotation of the rotating ball 10. The dust cover 113 can be connected to the two concave flanges 11. Of course, the dust cover 113 needs not to affect the movement of the rocker arm 2.

[0041] In use, the leak detection device of this utility model involves sealing the concave flange 11 with the mating groove to the open end of the pipe 5. Then, airflow is introduced into the pipe 5. Before the air pressure in the pipe 5 reaches a predetermined value, the detection element 3 will be driven by the airflow and move (the return spring is stretched). During this stage, the swing arm 2 will also move. When the air pressure in the pipe 5 reaches the predetermined value, the external airflow input is shut off. Under the pull of the return spring, the swing arm 2 and the detection element 3 tend to gradually return to their initial positions. If the swing arm 2 returns to its initial position and remains stationary after a period of time, it indicates that the internal diaphragm is intact. If the swing arm 2 is still moving or cannot return to its initial position after a period of time, it indicates that the internal diaphragm is damaged.

[0042] The leak detection device of this embodiment can determine whether the internal diaphragm of the pulse jet device is damaged based on the swing of the swing arm 2. When the internal diaphragm is intact, the return spring pulls the swing arm 2 back to its initial position, and the detection element 3, the swing arm 2, and the return spring are all in a static equilibrium state. When the internal diaphragm is damaged, the compressed air in the pipe 5 continues to leak internally, forming an airflow. The detection element 3 will also move, thereby driving the swing arm 2 to move or deviate from its initial position, thus indicating that the internal diaphragm is damaged. The leak detection device of this embodiment is not only intuitive and fast, but also can determine the fault location without external wiring. Of course, the distance sensor 40 in this embodiment can also be connected to a DCS system to determine the fault location. The DCS system is a distributed control system that collects data and performs real-time control through a field control station for global monitoring. The DCS system is a technology already available on the market and will not be described in detail here.

[0043] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A gas leak detection apparatus, characterized by, include: Connector (1), the connector (1) is used for a sealed connection with the pipe (5); A swing rod (2) is rotatably connected to the connector (1), and the first end of the swing rod (2) extends into the interior of the pipe (5), while the second end of the swing rod (2) is located outside the connector (1). The detection element (3) is connected to the first end of the pendulum rod (2), and the detection element (3) and the first end of the pendulum rod (2) can form a balanced state with the second end of the pendulum rod (2).

2. The apparatus of claim 1, wherein The connector (1) includes a rotating ball (10) and two concave flanges (11). The two concave flanges (11) have concave arc surfaces (111). The rotating ball (10) is rotatably disposed between the two concave arc surfaces (111). The rocker arm (2) is connected to the rotating ball (10).

3. The apparatus of claim 2, wherein The rotating ball (10) is sealed to the concave arc surface (111).

4. The apparatus of claim 3, wherein The concave arc surface (111) is provided with a lubricating layer, which is in sliding contact with the surface of the rotating ball (10).

5. The apparatus of claim 2, wherein One of the two concave flanges (11) is connected to a bracket (4), on which a distance sensor (40) is arranged, the distance sensor (40) being able to detect the distance between the second end of the swing arm (2) and the distance sensor (40).

6. The apparatus of claim 5, wherein, A reset component (41) is arranged on the bracket (4), and the two ends of the reset component (41) are respectively connected to the second end of the bracket (4) and the swing rod (2).

7. The apparatus of claim 2, wherein The concave flange (11) is provided with a constraint channel (112), and the swing rod (2) swings along the constraint channel (112).

8. The fuel leak detection apparatus of claim 7, wherein The orientation of the constraint channel (112) is consistent with the direction of fluid flow within the pipe (5).

9. The fuel leak detection apparatus of claim 2, wherein The outer covers of the two concave flanges (11) are provided with dust covers (113), and the rotating ball (10) is located inside the dust covers (113).

10. The fuel leak detection apparatus of any one of claims 1-9, wherein, The test piece (3) is a hollow sphere.

Images