Convenient blowing device for air volume transmitter of household garbage incineration plant

Abstract

The utility model relates to the technical field of pipeline purging, and discloses a convenient purging device for an air volume transmitter of a household garbage incineration plant, which comprises a differential pressure transmitter provided with a three-valve group comprising a high-pressure shut-off valve and a low-pressure shut-off valve; a flowmeter on the air inlet pipe is connected with a high-pressure sampling pipe and a low-pressure sampling pipe; a high-pressure pipe of the first purging assembly is communicated with a high-pressure shut-off valve and a high-pressure sampling pipe and is connected in series with a first branch pipe, a first ball valve, a first pressure gauge and a second branch pipe, the tail end of the first branch pipe is connected with a second ball valve, and the second branch pipe is connected with a third ball valve; a low-pressure pipe of the second purging assembly is communicated with a low-pressure shut-off valve and a low-pressure sampling pipe and is connected with a third branch pipe, a fourth ball valve, a second pressure gauge and a fourth branch pipe in series, the tail end of the third branch pipe is connected with a fifth ball valve, and the fourth branch pipe is connected with a sixth ball valve; the air inlet connector is communicated with the two branch pipes. According to the purging device, the two purging assemblies are integrated on the same mounting plate, assembly, disassembly and maintenance are convenient, the purging assemblies are provided with the ball valves and the pressure gauges, the visual purging function is achieved, and the overall operation time consumption is shortened.

Description

Technical Field

[0001] This utility model relates to the field of pipeline purging technology, and in particular to a convenient purging device for an air volume transmitter in a municipal solid waste incineration plant. Background Technology

[0002] In the process of municipal solid waste incineration, hot air needs to be continuously supplied into the incinerator to ensure complete combustion of waste and improve combustion efficiency. The hot air is delivered into the furnace through the air inlet duct, and its flow rate directly affects the stability of the combustion conditions. Therefore, it is necessary to accurately measure the hot air flow rate in the air inlet duct.

[0003] Currently, the industry typically uses a measuring device consisting of a flow meter, a differential pressure transmitter, a three-valve manifold (equipped with a high-pressure shut-off valve, a low-pressure shut-off valve, and a balancing valve), a high-pressure sampling tube, and a low-pressure sampling tube to detect flow. However, when the air inlet duct of a waste incineration plant delivers hot air, it actually draws air from the waste bin, creating a slightly negative pressure environment inside the bin to prevent odors from leaking out. However, the waste in the bin generates a large amount of dust particles during storage and transfer. These dust particles, after entering the air inlet duct with the air, easily adhere to and accumulate on the inner walls of the high-pressure and low-pressure sampling tubes. With prolonged use, the amount of dust accumulation gradually increases, leading to a decrease in the diameter of the sampling tubes or even blockage, directly affecting the accuracy of gas flow measurement. Therefore, it is necessary to regularly purge and clean the high-pressure and low-pressure sampling tubes to maintain the accuracy of the measuring device.

[0004] In existing technologies, the purging process involves the operator first closing the high-pressure and low-pressure shut-off valves of the three-valve manifold and opening the balance valve. Then, compressed air is directly introduced into the high-pressure and low-pressure sampling tubes. The impact force of the compressed air blows the accumulated dust and particles back into the inlet pipe, thus completing the cleaning. However, in practical applications, the directly introduced compressed air pressure is too high, easily leading to leakage or failure of the three-valve manifold. Furthermore, existing three-valve manifolds often use multi-turn needle valves, requiring operators to rotate the valve stem multiple times to fully open or close the valve. This valve opening and closing process alone consumes a significant amount of time, resulting in low efficiency for a single purging operation. In addition, the aforementioned structure cannot visually assess the degree of blockage and cleaning effect within the sampling tubes; operators must rely on experience to determine if blockage has occurred and proceed accordingly, further prolonging the overall purging process.

[0005] It is evident that existing technologies still need improvement and enhancement. Utility Model Content

[0006] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a convenient purging device for the air volume transmitter of a municipal solid waste incineration plant to solve the above-mentioned technical problems.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A convenient purging device for an air volume transmitter in a municipal solid waste incineration plant includes:

[0009] The frame includes a first crossbeam and a second crossbeam located below the first crossbeam;

[0010] The differential pressure transmitter is located on the first crossbeam. The differential pressure transmitter is equipped with a three-valve group, which includes a high-pressure shut-off valve and a low-pressure shut-off valve.

[0011] The mounting plate is located on the second crossbeam and below the differential pressure transmitter;

[0012] The waste incinerator is connected to an air inlet pipe, which is located below the vertical frame. A flow meter is installed on the air inlet pipe, and the flow meter is connected to a high-pressure sampling pipe and a low-pressure sampling pipe.

[0013] The first purging assembly is mounted on the mounting plate. The first purging assembly includes a high-pressure pipe and a second ball valve. The two ends of the high-pressure pipe are respectively connected to a high-pressure shut-off valve and a high-pressure sampling pipe. The high-pressure pipe is connected in sequence from the high-pressure shut-off valve to the high-pressure sampling pipe to a first branch pipe, a first ball valve, a first pressure gauge, and a second branch pipe. The second ball valve is connected to the end of the first branch pipe, and a third ball valve is connected to the second branch pipe.

[0014] The second purging assembly is mounted on the mounting plate. The second purging assembly includes a low-pressure pipe and a fifth ball valve. The two ends of the low-pressure pipe are connected to the low-pressure shut-off valve and the low-pressure sampling pipe, respectively. The low-pressure pipe is connected in sequence from the low-pressure shut-off valve to the low-pressure sampling pipe to the third branch pipe, the fourth ball valve, the second pressure gauge, and the fourth branch pipe. The fifth ball valve is connected to the end of the third branch pipe, and the fourth branch pipe is connected to the sixth ball valve.

[0015] The first tee pipe is located on the mounting plate. The second and fourth branch pipes are connected to the first tee pipe, and the first tee pipe is connected to an air inlet connector for connecting to an external compressed air source.

[0016] Furthermore, one end of the high-pressure pipe and the first branch pipe are both connected to a second tee pipe, and the second tee pipe is connected to the high-pressure shut-off valve through the first regulating pipe; the other end of the high-pressure pipe and the second branch pipe are connected to a third tee pipe, and the third tee pipe is connected to the high-pressure sampling pipe through the second regulating pipe.

[0017] One end of the low-pressure pipe and the third branch pipe are both connected to a fourth tee pipe, and the fourth tee pipe is connected to the low-pressure shut-off valve through the third regulating pipe; the other end of the low-pressure pipe and the fourth branch pipe are connected to a fifth tee pipe, and the fifth tee pipe is connected to the low-pressure sampling pipe through the fourth regulating pipe.

[0018] Furthermore, it also includes a cover, the mounting plate including a base plate disposed on the second crossbeam and a first side plate fixed to the bottom of the base plate, the cover including a panel hinged to the first side plate and three second side plates fixedly connected to the other three sides of the panel.

[0019] Furthermore, it also includes a first fastening assembly and a second fastening assembly; the first fastening assembly includes at least one clamp and at least one first clamp, and the second tee pipe, the third tee pipe, the fourth tee pipe and the fifth tee pipe are all fixed to the mounting plate by the first fastening assembly;

[0020] The second fastening assembly includes at least two second clamps, and the first tee pipe, the first ball valve, the second ball valve, the third ball valve, the fourth ball valve, the fifth ball valve, and the sixth ball valve are all fixed to the mounting plate by the second fastening assembly.

[0021] Furthermore, the second tee pipe, the first ball valve, and the third tee pipe are arranged along the same line; the second ball valve and the third ball valve are arranged along the same line and are located on the side of the high-pressure pipe away from the low-pressure pipe; the fourth tee pipe, the fourth ball valve, and the fifth tee pipe are arranged along the same line; the fifth ball valve and the sixth ball valve are arranged along the same line and are located on the side of the low-pressure pipe away from the high-pressure pipe.

[0022] Furthermore, it also includes a trolley, an air cannon, an air intake pipe, a first air outlet pipe, and a third air outlet pipe; the air cannon is fixed on the trolley, one end of the air intake pipe is connected to a compressed air source, and the other end is connected to the first air outlet pipe and the air intake end of the air cannon; a seventh ball valve is provided on the first air outlet pipe; a second air outlet pipe is provided at the air outlet end of the air cannon, and an eighth ball valve is provided on the second air outlet pipe; both the first and second air outlet pipes are connected to one end of the third air outlet pipe, and the other end of the third air outlet pipe is detachably connected to the air intake connector.

[0023] Furthermore, the first crossbeam is provided with several columns arranged along its length, each column corresponding to a differential pressure transmitter and connected to the differential pressure transmitter through an L-shaped plate.

[0024] Furthermore, the support frame also includes two parallel vertical bars, and the two ends of the second crossbeam are respectively connected to adjustment plates, each adjustment plate being vertically slidably connected to one of the vertical bars.

[0025] Furthermore, the vertical rod has a plurality of positioning holes arranged along its length, the adjusting plate has a sliding groove that is slidably connected to the vertical rod, and the adjusting plate is connected to the corresponding positioning holes by a plurality of fasteners.

[0026] Beneficial effects:

[0027] This utility model provides a convenient purging device for the air volume transmitter of a municipal solid waste incineration plant, which has the following beneficial effects: (1) This device integrates the first purging component and the second purging component on the same mounting plate, which is convenient for upgrading the existing air volume measurement equipment; the ball valve structure replaces the traditional multi-turn needle valve, and the valve can be fully opened or fully closed by rotating 90°, which shortens the operation time of valve group opening and closing. Moreover, the two sets of purging components can independently perform single-path purging operations. With the real-time reading feedback of the pressure gauge, the purging can be visualized, which can quickly judge the pipeline blockage and further shorten the overall purging operation time; (2) This device is equipped with a dual-mode supply structure of conventional constant compressed air source and air cannon pulse high-pressure air source. When the sampling tube is blocked, the instantaneous high-pressure pulse airflow generated by the air cannon can effectively loosen and blow away the stubborn dust in the sampling tube, and achieve deep pipeline unblocking. Compared with the traditional manual pipe dismantling and unblocking method, there is no need for the operator to move to the flow meter position to carry out pipe dismantling operations, which further improves the efficiency and convenience of unblocking operations. Attached Figure Description

[0028] Figure 1 The structure of this utility model Figure 1 ;

[0029] Figure 2 The structure of this utility model Figure 2 ;

[0030] Figure 3 This is a schematic diagram of the connection principle of this utility model;

[0031] Figure 4 This is a partial exploded view of the present invention;

[0032] Figure 5 This is a structural diagram of the central support frame of this utility model;

[0033] Figure 6 This is a structural diagram of the small vehicle of this utility model;

[0034] Figure 7 This is a schematic diagram of the installation of this utility model.

[0035] Reference numerals: 1. Frame; 11. First crossbeam; 12. Second crossbeam; 121. Adjusting plate; 122. Fastener; 13. Column; 14. Vertical rod; 141. Positioning hole; 2. Differential pressure transmitter; 2. Three-valve manifold; 21. High-pressure shut-off valve; 211. Low-pressure shut-off valve; 212. L-shaped plate; 22. Mounting plate; 3. Cover; 31. Panel; 311. Second side plate; 312. Base plate; 32. First side plate; 33. First fastening assembly; 34. Clamp; 341. First clamp; 342. Second fastening assembly; 35. Waste incinerator; 4. Air inlet pipe; 41. Flow meter; 42. High-pressure sampling pipe; 43. Low-pressure sampling pipe; 44. First purging assembly; 5. High-pressure pipe; 51. Second ball valve; 52. First branch pipe; 53. First... Ball valve 54, first pressure gauge 55, second branch pipe 56, third ball valve 57, second tee pipe 58, first regulating pipe 581, third tee pipe 59, second regulating pipe 591, second purging assembly 6, low-pressure pipe 61, fifth ball valve 62, third branch pipe 63, fourth ball valve 64, second pressure gauge 65, fourth branch pipe 66, sixth ball valve 67, fourth tee pipe 68, third regulating pipe 681, fifth tee pipe 69, fourth regulating pipe 691, first tee pipe 7, air inlet connector 71, pad block 72, trolley 8, air cannon 81, air inlet pipe 82, first air outlet pipe 83, third air outlet pipe 84, seventh ball valve 85, second air outlet pipe 86, eighth ball valve 87. Detailed Implementation

[0036] This utility model provides a convenient purging device for an air volume transmitter in a municipal solid waste incineration plant. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes the utility model in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.

[0037] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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 a specific orientational structure and operation. Therefore, they should not be construed as limitations on this utility model. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0038] Please see Figures 1 to 7As shown, this utility model provides a convenient purging device for an air volume transmitter in a municipal solid waste incineration plant, including: a support frame 1, a differential pressure transmitter 2, a mounting plate 3, a waste incinerator 4, a first purging assembly 5, a second purging assembly 6, and a first three-way pipe 7; the support frame 1 includes a first crossbeam 11 and a second crossbeam 12 located below the first crossbeam 11; the differential pressure transmitter 2 is mounted on the first crossbeam 11, and the differential pressure transmitter 2 is equipped with a three-valve group 21, which includes a high-pressure shut-off valve 211 and a low-pressure shut-off valve 211. Valve 212; Mounting plate 3 is mounted on the second crossbeam 12 and located below the differential pressure transmitter 2; Waste incinerator 4 is connected to an air inlet pipe 41, which is located below the support frame 1. A flow meter 42 is installed on the air inlet pipe 41, and the flow meter 42 is connected to a high-pressure sampling pipe 43 and a low-pressure sampling pipe 44; The first purging assembly 5 is mounted on the mounting plate 3. The first purging assembly 5 includes a high-pressure pipe 51 and a second ball valve 52. The two ends of the high-pressure pipe 51 are respectively connected to the high-pressure shut-off valve 211 and the high-pressure sampling pipe 43. The high-pressure pipe 51 is connected in sequence from the high-pressure shut-off valve 211 to the high-pressure sampling pipe 43, including a first branch pipe 53, a first ball valve 54, a first pressure gauge 55, and a second branch pipe 56. The second ball valve 52 is connected to the end of the first branch pipe 53, and a third ball valve 57 is connected to the second branch pipe 56. The second purging assembly 6 is mounted on the mounting plate 3. The second purging assembly 6 includes a low-pressure pipe 61 and a fifth ball valve 62. The two ends of the low-pressure pipe 61 are connected to the low-pressure shut-off valve 212 and the low-pressure sampling pipe 44, respectively. The low-pressure pipe 61 is connected in sequence from the low-pressure shut-off valve 212 to the low-pressure sampling pipe 44 to the third branch pipe 63, the fourth ball valve 64, the second pressure gauge 65, and the fourth branch pipe 66. The fifth ball valve 62 is connected to the end of the third branch pipe 63, and the fourth branch pipe 66 is connected to the sixth ball valve 67. The first three-way pipe 7 is located on the mounting plate 3. The second branch pipe 56 and the fourth branch pipe 66 are both connected to the first three-way pipe 7, and the first three-way pipe 7 is connected to the air inlet connector 71, which is used to connect to an external compressed air source.

[0039] Before initiating the purging operation, first close the first ball valve 54 and the fourth ball valve 64 to disconnect the high-pressure pipe 51, low-pressure pipe 61, and three-valve group 21 via the valve assembly, preventing compressed gas from back-impacting the three-valve group 21. Then, open the second ball valve 52 and the fifth ball valve 62 to connect the high-pressure side branch from the first ball valve 54 to the high-pressure shut-off valve 211 and the low-pressure side branch from the fifth ball valve 62 to the low-pressure shut-off valve 212 to the atmosphere, thereby depressurizing the pipelines and placing the differential pressure transmitter 2 in a stable environment free from pressure interference. At this time, zero-adjustment can be performed simultaneously to avoid affecting the accuracy of subsequent flow detection due to zero-point drift. Afterward, connect the external compressed air source to the inlet connector 71 via pipeline to complete the power source connection. A single-path purging method is used. When cleaning the high-pressure side pipeline, the third ball valve 57 is opened while the sixth ball valve 67 remains closed. Compressed air enters the high-pressure pipeline 51 through the first three-way pipe 7 and the second branch pipe 56, and finally enters the high-pressure sampling pipe 43. The gas impact force blows the dust particles accumulated in the pipe back to the air inlet pipe 41. When cleaning the low-pressure side pipeline, the sixth ball valve 67 is opened while the third ball valve 57 remains closed. Compressed air enters the low-pressure pipeline 61 through the first three-way pipe 7 and the fourth branch pipe 66, and finally enters the low-pressure sampling pipe 44, thus cleaning the dust in the low-pressure side pipeline. During the purging process, the readings of the corresponding pressure gauges are observed in real time. When the pressure gauge reading stabilizes at 0, it indicates that the dust in the corresponding pipeline has been cleaned and the airflow is smooth, completing the purging of that side. If the pressure gauge reading remains above 0 and does not decrease significantly, it indicates that there is a blockage in the corresponding pipeline, and auxiliary measures need to be taken until the reading returns to 0 to ensure thorough purging.

[0040] The purging assembly uses a ball valve structure instead of the traditional multi-turn needle valve. A 90° rotation of the valve completes full opening or closing, significantly reducing the valve group's switching time. Simultaneously, the two purging assemblies can independently perform single-channel purging. Combined with the intuitive feedback from the pressure gauge, it eliminates the need to rely on experience to judge blockages, achieving visualized purging and shortening the overall operation time. The ball valve has excellent high-pressure resistance, able to withstand the impact pressure of compressed air sources, avoiding the damage to the sealing structure of the three-valve group 21 caused by high-pressure gas in traditional purging methods. This effectively reduces the risk of leakage or failure of the three-valve group 21. Furthermore, a pressure relief operation before purging isolates the high-pressure gas from direct contact with the differential pressure transmitter 2 and the three-valve group 21, and zero-calibration of the differential pressure transmitter 2 is performed before purging to ensure accurate flow measurement reference after purging. In addition, the first purging assembly 5 and the second purging assembly 6 are integrated on the same mounting plate 3, adopting a modular structure design. This not only simplifies the overall installation process of the device and reduces the complexity of on-site construction, but also facilitates the modification and upgrading of the existing waste incinerator 4 air volume measurement device. It eliminates the need for large-scale disassembly and reconstruction of the original measurement system, reducing the cost and cycle of technical transformation and improving the engineering application adaptability of the device.

[0041] It should be noted that, since the air inlet pipe 41 is located below the purging assembly and the differential pressure transmitter 2, the dust particles entering the sampling pipe fall naturally due to their own weight, and eventually accumulate in the lower area of ​​the high-pressure sampling pipe 43 and the low-pressure sampling pipe 44, forming a stubborn blockage. After the purging operation, if the reading on the corresponding side of the first pressure gauge 55 or the second pressure gauge 65 remains higher than 0, it indicates that there is a blockage in the sampling tube on that side. At this time, auxiliary unblocking measures need to be taken: First, close the ball valve of the corresponding side purging circuit, move to the installation position of the flow meter 42, disconnect the connection port between the high-pressure sampling tube 43 and the flow meter 42, and the connection port between the low-pressure sampling tube 44 and the flow meter 42. Slowly insert a thin iron wire along the sampling tube cavity from bottom to top, and use the mechanical force of the thin iron wire to loosen the caking dust accumulated at the bottom of the tube or wrap and remove stubborn blockages. Then reconnect the sampling tube and the flow meter 42 port, and start the single-path purging operation on the corresponding side again, so that the loosened dust particles are blown back to the air inlet pipe 41 under the impact of compressed gas, so as to achieve a thorough unblocking of the sampling tube.

[0042] The core components involved in this device all utilize existing mature technologies. The differential pressure transmitter 2 can be model EJA110E-JMS5J-912NA, which features high measurement accuracy and strong anti-interference capabilities. The three-valve manifold 21 uses model CV3P-0NF3LE / D1, which is well-compatible with the selected differential pressure transmitter 2. The ball valve is a model 3PC-Q11F manual ball valve, which has a compact structure and excellent sealing performance. The flow meter 42 is a Delta-type flow meter. When fluid flows through the flow meter 42 in the inlet pipe 41, a high-pressure distribution zone is generated in the front direction of the flow, and a low-pressure distribution zone is generated behind it. Accurate flow measurement is achieved by capturing the pressure difference between the two sides. All the above components are existing technologies widely used in the industry, and their specific structures, working principles, and installation methods are common knowledge, so they will not be described in detail here.

[0043] In a preferred embodiment, see [reference] Figure 3 , 4One end of the high-pressure pipe 51 and the first branch pipe 53 are both connected to a second three-way pipe 58. The second three-way pipe 58 is connected to the high-pressure shut-off valve 211 through the first regulating pipe 581. The other end of the high-pressure pipe 51 and the second branch pipe 56 are connected to a third three-way pipe 59. The third three-way pipe 59 is connected to the high-pressure sampling pipe 43 through the second regulating pipe 591. One end of the low-pressure pipe 61 and the third branch pipe 63 are both connected to a fourth three-way pipe 68. The fourth three-way pipe 68 is connected to the low-pressure shut-off valve 212 through the third regulating pipe 681. The other end of the low-pressure pipe 61 and the fourth branch pipe 66 are connected to a fifth three-way pipe 69. The fifth three-way pipe 69 is connected to the low-pressure sampling pipe 44 through the fourth regulating pipe 691. The installation height differences between the first regulating pipe 581, the second regulating pipe 591, the third regulating pipe 681, and the fourth regulating pipe 691 can be flexibly accommodated by the first purging assembly 5, the second purging assembly 6, the high-pressure shut-off valve 211, the low-pressure shut-off valve 212, the high-pressure sampling pipe 43, and the low-pressure sampling pipe 44. This effectively resolves the pipeline connection difficulties caused by limited on-site installation space or component layout deviations. Furthermore, all regulating pipes are made of copper, which possesses excellent flexibility and plasticity, allowing for slight bending adjustments according to actual installation requirements. This ensures the sealing and stability of the pipeline connections and enhances the adaptability of the device under different on-site conditions. In addition, due to the modular design of the first purging assembly 5 and the second purging assembly 6 integrated into the same mounting plate 3, when the device experiences valve damage or pipeline leakage, the entire module can be directly disassembled and replaced with a new one. This allows the waste incinerator 4 and the air inlet pipe 82 to quickly return to working condition. Damaged modules can be transported off-site for professional repair, further improving the ease of operation and maintenance of the device.

[0044] In a preferred embodiment, see [reference] Figure 1 , 2 4. It also includes a cover 31. The mounting plate 3 includes a base plate 32 mounted on the second crossbeam 12 and a first side plate 33 fixed to the bottom of the base plate 32. The cover 31 includes a panel 311 hinged to the first side plate 33 and three second side plates 312 fixedly connected to the other three sides of the panel 311. During normal operation of the device, the cover 31 is in a closed state and completely covers the mounting plate 3 and the first purging assembly 5 and the second purging assembly 6 integrated thereon to provide protection. When purging operations or maintenance are required, the panel 311 can be flipped down to open the cover 31. At this time, the three second side plates 312 fixedly connected to the panel 311 will swing down synchronously with the panel 311, completely away from the operating area of ​​the first purging assembly 5 and the second purging assembly 6, without obstructing valve opening and closing, air source connection, pressure gauge observation, etc., ensuring that operators can clearly observe the status of the components and carry out operations conveniently.

[0045] In a preferred embodiment, see [reference] Figure 4It also includes a first fastening assembly 34 and a second fastening assembly 35; the first fastening assembly 34 includes at least one clamp 341 and at least one first clamp 342, and the second tee pipe 58, the third tee pipe 59, the fourth tee pipe 68 and the fifth tee pipe 69 are all fixed to the mounting plate 3 by the first fastening assembly 34; the second fastening assembly 35 includes at least two second clamps, and the first tee pipe 7, the first ball valve 54, the second ball valve 52, the third ball valve 57, the fourth ball valve 64, the fifth ball valve 62 and the sixth ball valve 67 are all fixed to the mounting plate 3 by the second fastening assembly 35. For the first purging assembly 5, one end of the second tee pipe 58 and the third tee pipe 59 are connected to the mounting plate 3 via clamps 341 to achieve initial positioning of the assembly; the other end of the second tee pipe 58 and the third tee pipe 59 are further locked via first clamps 342 to ensure the installation stability of the first purging assembly 5 on the mounting plate 3; while the first ball valve 54, the second ball valve 52, and the third ball valve 57 are symmetrically clamped and fixed by two second clamps, limiting the shaking or displacement of the valves during operation through two-point positioning, ensuring structural stability during switching operations. The fixing method of the second purging assembly 6 is the same as that of the first purging assembly 5. The fourth tee pipe 68 and the fifth tee pipe 69 are bidirectionally fixed to the first clamps 342 via clamps 341, and the fourth ball valve 64, the fifth ball valve 62, and the sixth ball valve 67 are positioned at two points via corresponding second clamps, which not only ensures the regularity of the integrated installation of each component, but also provides structural support for the stable operation of the purging operation.

[0046] In the above description, the bottom of clamp 341 is detachably fixed to mounting plate 3 with screws. Its main body has two symmetrically distributed elastic grippers. During installation, the grippers open outwards due to their elastic deformation. After the tee pipe is inserted, the grippers tightly grip the outer wall of the tee pipe under the action of elastic restoring force, achieving rapid positioning and fixation of the tee pipe to mounting plate 3. The first clamp 342 has an n-shaped structure, and its two fixing ears are locked to mounting plate 3 with screws. During installation, the corresponding end of the tee pipe is embedded into the clamp, and the inner wall of the clamp fits and limits the movement of the tee pipe. Combined with the locking force of the screws, a stable constraint is formed, effectively limiting the radial sway and axial displacement of the tee pipe. The second clamp used to fix the ball valve and the first tee pipe 7 also adopts an n-shaped structure, and its two sides are fixed to mounting plate 3 with screws to firmly fix the components in the installation position.

[0047] It should be noted that since the second branch pipe 56 and the fourth branch pipe 66 are located on the side of the high-pressure pipe 51 and the low-pressure pipe 61 away from the mounting plate 3, there is an installation gap between the first tee pipe 7 and the mounting plate 3. Therefore, a pad 72 needs to be added between the first tee pipe 7 and the mounting plate 3 to raise the installation height of the first tee pipe 7, so that the first tee pipe 7 can be smoothly connected with the second branch pipe 56 and the fourth branch pipe 66. At the same time, with the symmetrical clamping and fixing of the two second clamps, its installation stability can be effectively enhanced. Especially when plugging and unplugging the compressed air source, it can effectively prevent the first tee pipe 7 from shifting or shaking.

[0048] In a preferred embodiment, see [reference] Figure 4 The second tee pipe 58, the first ball valve 54, and the third tee pipe 59 are arranged collinearly, and their axis is consistent with the extension direction of the high-pressure pipe 51, so that the high-pressure side pipeline of the first purging assembly 5 forms a regular straight-line layout, improving the compactness of the assembly integration and installation; the second ball valve 52 and the third ball valve 57 are arranged collinearly and located on the side of the high-pressure pipe 51 away from the low-pressure pipe 61, which is convenient for operators to operate; the fourth tee pipe 68, the fourth ball valve 64, and the fifth tee pipe 69 are arranged collinearly, and their axis is consistent with the extension direction of the low-pressure pipe 61, ensuring the second purging assembly The low-pressure side pipeline layout of 6 is neat and orderly; the fifth ball valve 62 and the sixth ball valve 67 are arranged in the same line and are located on the side of the low-pressure pipe 61 away from the high-pressure pipe 51, forming a mirror symmetrical structure with the high-pressure side valve layout, and the overall appearance of the device is neat and uniform; preferably, the first pressure gauge 55 is located between the second ball valve 52 and the third ball valve 57, and the second pressure gauge 65 is located between the fifth ball valve 62 and the sixth ball valve 67, which further improves the compactness of the integration of each component and places the pressure gauges within the direct observation range of the operator, making it convenient to monitor the pressure changes of the corresponding side pipeline in real time during the purging operation.

[0049] In a preferred embodiment, see [reference] Figure 3 , 6 It also includes a trolley 8, an air cannon 81, an air inlet pipe 82, a first air outlet pipe 83, and a third air outlet pipe 84. Specifically, the bottom of the trolley 8 is rotatably connected to several casters, and a handle is provided on one side of the trolley 8 to facilitate the movement of the air cannon 81. The air cannon 81 is fixed on the trolley 8. One end of the air inlet pipe 82 is connected to a compressed air source, and the other end is connected to the first air outlet pipe 83 and the air inlet end of the air cannon 81. A seventh ball valve 85 is provided on the first air outlet pipe 83. The air outlet end of the air cannon 81 is provided with a second air outlet pipe 86, and an eighth ball valve 87 is provided on the second air outlet pipe 86. Both the first air outlet pipe 83 and the second air outlet pipe 86 are connected to one end of the third air outlet pipe 84. The other end of the third air outlet pipe 84 is detachably connected to the air inlet connector 71 to facilitate the quick connection and disconnection of the compressed air source.

[0050] In actual purging operations, the air source type can be flexibly switched according to the pipeline blockage: During the initial purging, open the seventh ball valve 85 and close the eighth ball valve 87 to allow a constant pressure compressed air source to enter the purging assembly through the first outlet pipe 83 and the third outlet pipe 84 for routine purging; at this time, observe the corresponding side pressure gauge reading in real time. If the reading is stable at 0, it indicates that the pipeline is unobstructed and the purging is over; if the reading is consistently higher than 0, it indicates that there is a stubborn blockage in the sampling tube, and it is necessary to switch to pulse purging mode: close the seventh ball valve 85 and open the eighth ball valve 87 to start the air cannon 81 to generate an instantaneous high-pressure pulse airflow. This pulse airflow is injected into the blocked sampling tube through the second outlet pipe 86 and the third outlet pipe 84. The instantaneous impact force of the airflow loosens the hardened dust particles, and at the same time, the pulse oscillation of the airflow blows away the stubborn blockages to achieve deep unblocking.

[0051] Furthermore, the casters at the bottom of the trolley 8 and the handles on the side allow for easy movement of the entire air source device on-site. This facilitates adjustments to the operating position based on the layout of the air inlet pipe 41 of different waste incinerators 4 or the purging requirements of multiple measurement points, significantly improving the device's on-site operational flexibility and adaptability. By adding an air cannon 81 to form a pulse purging method, compared to traditional manual unblocking, it can not only quickly and accurately resolve stubborn blockages in the sampling tube, but also eliminates the need for operators to move to the flow meter 42 to disassemble and unclog the pipe, further improving unblocking efficiency.

[0052] It should be noted that the air inlet pipe 82 is directly connected to the existing compressed air source pipeline in the workshop to achieve a stable air supply. The triggering frequency and pulse pressure of the air cannon 81 can be preset and adjusted according to different working conditions such as pipe diameter. Before the first purging operation, the optimal parameter combination can be determined through multiple tests to ensure that the pulse airflow intensity is sufficient to break up the plated blockages in the pipe, while avoiding damage to the inner wall of the sampling pipe due to excessive pressure. In addition, the air cannon 81 can be a KQP-B series product with a working pressure range of 0.4~0.8MPa. The intake pressure can be adjusted to precisely match the clearing requirements of the sampling pipe. The relevant structural principles and working methods of the air cannon 81 are all existing technologies, so the specific installation adaptation, parameter debugging and other details will not be described here.

[0053] In a preferred embodiment, see [reference] Figure 5 , 7The first crossbeam 11 is provided with several columns 13 arranged along its length. Each column 13 corresponds to a differential pressure transmitter 2 and is connected to the differential pressure transmitter 2 via an L-shaped plate 22, forming a multi-station installation structure. This configuration accommodates the centralized installation of multiple differential pressure transmitters 2, allowing multiple sets of devices to be arranged orderly along the first crossbeam 11. This not only saves on-site installation space but also makes the overall layout more organized. When multiple measurement points need to be purged simultaneously or sequentially, operators do not need to move back and forth on-site and can complete the purging operation of all sampling tubes corresponding to the differential pressure transmitters 2 in the same work area, significantly improving the efficiency of multi-station purging and facilitating unified management and maintenance.

[0054] In a preferred embodiment, see [reference] Figure 5 The support frame 1 also includes two parallel vertical rods 14, and adjusting plates 121 are connected to both ends of the second crossbeam 12. Each adjusting plate 121 is vertically slidably connected to one of the vertical rods 14. Through the above-mentioned adjustable structure, the height of the second crossbeam 12 can be flexibly adjusted according to the operator's working habits and the limitations of the site space, thereby simultaneously adjusting the operating height of the purging assembly. It can be adjusted to a position that allows the operator to work in a comfortable posture such as bending over or squatting, improving the convenience of operation.

[0055] Further, see Figure 5 The vertical rod 14 has several positioning holes 141 arranged along its length. The adjusting plate 121 has a sliding groove that is slidably connected to the vertical rod 14. The adjusting plate 121 is connected to the corresponding positioning holes 141 by several fasteners 122. The fasteners 122 are screws. The layered arrangement of multiple sets of positioning holes 141 allows for multi-level adjustment of the operating height of the purging assembly. When the second crossbeam 12 is adjusted to the target height, the fasteners 122 can be passed through the adjusting plate 121 and screwed into the positioning holes 141 at the corresponding positions of the vertical rod 14 to limit the vertical displacement of the adjusting plate 121 along the vertical rod 14 and ensure the installation stability of the second crossbeam 12 and the purging assembly.

[0056] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of the appended claims of this utility model.

Claims

1. A convenient purging device for an air volume transmitter in a municipal solid waste incineration plant, characterized in that, include: The frame (1) includes a first crossbeam (11) and a second crossbeam (12) located below the first crossbeam (11); Differential pressure transmitter (2) is mounted on the first crossbeam (11). The differential pressure transmitter (2) is equipped with a three-valve group (21), which includes a high-pressure shut-off valve (211) and a low-pressure shut-off valve (212). Mounting plate (3) is located on the second crossbeam (12) and below the differential pressure transmitter (2); The waste incinerator (4) is connected to an air inlet pipe (41). The air inlet pipe (41) is located below the support frame (1). A flow meter (42) is installed on the air inlet pipe (41). The flow meter (42) is connected to a high-pressure sampling pipe (43) and a low-pressure sampling pipe (44). The first purging assembly (5) is mounted on the mounting plate (3). The first purging assembly (5) includes a high-pressure pipe (51) and a second ball valve (52). The two ends of the high-pressure pipe (51) are connected to the high-pressure shut-off valve (211) and the high-pressure sampling pipe (43) respectively. The high-pressure pipe (51) is connected in sequence from the high-pressure shut-off valve (211) to the high-pressure sampling pipe (43) to the first branch pipe (53), the first ball valve (54), the first pressure gauge (55), and the second branch pipe (56). The second ball valve (52) is connected to the end of the first branch pipe (53), and the second branch pipe (56) is connected to the third ball valve (57). The second purging assembly (6) is mounted on the mounting plate (3). The second purging assembly (6) includes a low-pressure pipe (61) and a fifth ball valve (62). The two ends of the low-pressure pipe (61) are connected to the low-pressure shut-off valve (212) and the low-pressure sampling pipe (44) respectively. The low-pressure pipe (61) is connected in sequence from the low-pressure shut-off valve (212) to the low-pressure sampling pipe (44) to the third branch pipe (63), the fourth ball valve (64), the second pressure gauge (65) and the fourth branch pipe (66). The fifth ball valve (62) is connected to the end of the third branch pipe (63), and the fourth branch pipe (66) is connected to the sixth ball valve (67). The first three-way pipe (7) is located on the mounting plate (3). The second branch pipe (56) and the fourth branch pipe (66) are connected to the first three-way pipe (7). The first three-way pipe (7) is connected to an air inlet connector (71), which is used to connect to an external compressed air source.

2. The convenient purging device for the air volume transmitter in a municipal solid waste incineration plant according to claim 1, characterized in that, One end of the high-pressure pipe (51) and the first branch pipe (53) are both connected to a second three-way pipe (58). The second three-way pipe (58) is connected to the high-pressure shut-off valve (211) through the first regulating pipe (581). The other end of the high-pressure pipe (51) and the second branch pipe (56) are connected to a third three-way pipe (59). The third three-way pipe (59) is connected to the high-pressure sampling pipe (43) through the second regulating pipe (591). One end of the low-pressure pipe (61) and the third branch pipe (63) are both connected to a fourth three-way pipe (68). The fourth three-way pipe (68) is connected to the low-pressure shut-off valve (212) through the third regulating pipe (681). The other end of the low-pressure pipe (61) and the fourth branch pipe (66) are connected to a fifth three-way pipe (69). The fifth three-way pipe (69) is connected to the low-pressure sampling pipe (44) through the fourth regulating pipe (691).

3. The convenient purging device for the air volume transmitter in a municipal solid waste incineration plant according to claim 1, characterized in that, It also includes a cover (31), the mounting plate (3) includes a base plate (32) disposed on the second crossbeam (12), and a first side plate (33) fixed to the bottom of the base plate (32), the cover (31) includes a panel (311) hinged to the first side plate (33), and three second side plates (312) fixedly connected to the other three sides of the panel (311).

4. The convenient purging device for the air volume transmitter in a municipal solid waste incineration plant according to claim 2, characterized in that, It also includes a first fastening assembly (34) and a second fastening assembly (35); the first fastening assembly (34) includes at least one clamp (341) and at least one first clamp (342), and the second tee pipe (58), the third tee pipe (59), the fourth tee pipe (68) and the fifth tee pipe (69) are all fixed to the mounting plate (3) by the first fastening assembly (34); The second fastening assembly (35) includes at least two second clamps, and the first tee pipe (7), the first ball valve (54), the second ball valve (52), the third ball valve (57), the fourth ball valve (64), the fifth ball valve (62) and the sixth ball valve (67) are all fixed to the mounting plate (3) by the second fastening assembly (35).

5. The convenient purging device for the air volume transmitter in a municipal solid waste incineration plant according to claim 4, characterized in that, The second three-way pipe (58), the first ball valve (54), and the third three-way pipe (59) are arranged in the same line; the second ball valve (52) and the third ball valve (57) are arranged in the same line and are located on the side of the high-pressure pipe (51) away from the low-pressure pipe (61); the fourth three-way pipe (68), the fourth ball valve (64), and the fifth three-way pipe (69) are arranged in the same line; the fifth ball valve (62) and the sixth ball valve (67) are arranged in the same line and are located on the side of the low-pressure pipe (61) away from the high-pressure pipe (51).

6. The convenient purging device for the air volume transmitter in a municipal solid waste incineration plant according to claim 1, characterized in that, It also includes a trolley (8), an air cannon (81), an air inlet pipe (82), a first air outlet pipe (83), and a third air outlet pipe (84); the air cannon (81) is fixed on the trolley (8), one end of the air inlet pipe (82) is connected to a compressed air source, and the other end is connected to the first air outlet pipe (83) and the air inlet end of the air cannon (81); a seventh ball valve (85) is provided on the first air outlet pipe (83); a second air outlet pipe (86) is provided on the air outlet end of the air cannon (81), and an eighth ball valve (87) is provided on the second air outlet pipe (86). The first air outlet pipe (83) and the second air outlet pipe (86) are both connected to one end of the third air outlet pipe (84), and the other end of the third air outlet pipe (84) is detachably connected to the air inlet connector (71).

7. The convenient purging device for the air volume transmitter in a municipal solid waste incineration plant according to claim 1, characterized in that, The first crossbeam (11) is provided with several columns (13) arranged along its length direction. Each column (13) corresponds to a differential pressure transmitter (2) and is connected to the differential pressure transmitter (2) through an L-shaped plate (22).

8. The convenient purging device for the air volume transmitter in a municipal solid waste incineration plant according to claim 1, characterized in that, The support frame (1) also includes two parallel vertical rods (14), and the two ends of the second crossbeam (12) are respectively connected to adjustment plates (121), and each adjustment plate (121) is vertically slidably connected to a vertical rod (14).

9. The convenient purging device for the air volume transmitter in a municipal solid waste incineration plant according to claim 8, characterized in that, The vertical rod (14) has a number of positioning holes (141) arranged along its length direction. The adjusting plate (121) has a sliding groove that is slidably connected to the vertical rod (14). The adjusting plate (121) is connected to the corresponding positioning hole (141) by a number of fasteners (122).

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