Back blowing device and hearth purging system

Abstract

The utility model relates to a back flushing device and a hearth purging system.The back flushing device comprises a shell, an air inlet pipe, a pressure reducing valve, a communicating pipe, a flow meter and an air outlet pipe, the air inlet pipe, the pressure reducing valve, the communicating pipe, the flow meter and the air outlet pipe are sequentially communicated, the pressure reducing valve, the communicating pipe and the flow meter are all arranged in the shell, and the air inlet pipe and the air outlet pipe penetrate through the shell; according to the back flushing device, the situation that the pipeline is broken and leaks air can be reduced, the blowing stability of the back flushing device is improved, and a hearth can operate normally.

Description

Technical Field

[0001] The present disclosure relates to the field of furnace detection technology, and in particular to a back-blowing device and a furnace purge system. Background Art

[0002] The sampling pipeline of the furnace negative pressure measurement point is prone to ash blockage after long-term use. To solve this problem, a back-blowing device is needed to purge the sampling pipeline. However, the existing back-blowing device usually consists of a pressure reducing valve, a flow meter and several pipelines. When the back-blowing device is purging, a high wind pressure is likely to be generated inside the pipeline, which in turn easily causes the pipeline to bend and shake. After the pipeline shakes frequently, it is easy to age and cause rupture and leakage. If leakage occurs during the purge process, the pressure will fluctuate greatly, affecting the automatic adjustment of the furnace negative pressure. More seriously, the main fuel of the boiler may even trip. In addition, the pressure reducing valve and flow meter are usually arranged in a dispersed manner, which is not convenient for centralized management and there are no protective measures. Utility Model Content

[0003] The purpose of the present disclosure is to provide a back-blowing device and a furnace purge system, which can reduce the situation of pipeline rupture and gas leakage, improve the purge stability of the back-blowing device, allow the furnace to operate normally, and facilitate centralized management and protection, so as to at least partially solve the above-mentioned technical problems.

[0004] In order to achieve the above-mentioned purpose, the first aspect of the present disclosure provides a backblowing device, including a shell, and an air inlet pipe, a pressure reducing valve, a connecting pipe, a flow meter and an air outlet pipe connected in sequence, the pressure reducing valve, the connecting pipe and the flow meter are all arranged in the shell, the air inlet pipe and the air outlet pipe are respectively penetrated through the shell, the air inlet pipe is used to connect to the air source, and the air outlet pipe is used to purge the sampling pipeline.

[0005] Optionally, the pressure reducing valve and the air inlet pipe are connected to the connecting pipe via a first quick-connect connector; and / or the flow meter and the air outlet pipe are connected to the connecting pipe via a second quick-connect connector.

[0006] Optionally, the air inlet pipe, the air outlet pipe and the connecting pipe are constructed as metal pipe bodies.

[0007] Optionally, the air inlet pipe includes a first tube body located inside the shell and a second tube body located outside the shell, and the first tube body and the second tube body are connected via a third quick-plug connector on the shell; and / or, the air outlet pipe includes a third tube body located inside the shell and a fourth tube body located outside the shell, and the third tube body and the fourth tube body are connected via another third quick-plug connector on the shell.

[0008] Optionally, the flow meter is configured as a gas float flow meter.

[0009] Optionally, the connecting pipe is configured as a bellows.

[0010] Optionally, the back-blowing device further comprises a limit assembly, one end of which is connected to one end of the connecting pipe close to the flow meter, and the other end of which is connected to the other end of the connecting pipe close to the pressure reducing valve.

[0011] Optionally, the limit assembly includes: a first adjusting threaded tube; and two limit screws, the thread rotation directions of the two limit screws are opposite, one end of one of the limit screws is threadedly connected to the first end of the first adjusting threaded tube, and the other end is provided with a limit portion connected to an end of the connecting pipe close to the flow meter, one end of the other limit screw is threadedly connected to the second end of the first adjusting threaded tube, and the other end is provided with a limit portion connected to an end of the connecting pipe close to the pressure reducing valve, and the two limit screws are moved closer to or away from each other by rotating the first adjusting threaded tube.

[0012] Optionally, a second adjusting nut is provided on the connecting pipe, and the limiting portion includes a plurality of clamping surfaces that can fit on the outer side wall of the second adjusting nut.

[0013] A second aspect of the present disclosure provides a furnace purge system, comprising an air source and a back-blowing device as described in the above optional scheme, wherein an air inlet pipe of the back-blowing device is connected to the air source, and an air outlet pipe of the back-blowing device is used to purge a sampling pipeline.

[0014] Through the above technical solution, that is, the back-blowing device provided by the present disclosure, the shell can centrally manage the air inlet pipe, the pressure reducing valve, the connecting pipe, the flow meter and the air outlet pipe, which is convenient for personnel inspection and management, and the shell can provide a protective effect to protect the pressure reducing valve and the flow meter. In addition, due to the arrangement of the shell, the air inlet pipe, the connecting pipe and the air outlet pipe can reduce the bending and shaking caused by the high wind pressure inside the pipe to a certain extent during the purge process, thereby reducing the occurrence of rupture and leakage due to aging of the pipe.

[0015] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0017] Figure 1 is a schematic structural diagram of a backflush device provided in an exemplary embodiment of the present disclosure;

[0018] Figure 2 Schematic diagram of the structure of the limit assembly provided in the exemplary embodiment of the present disclosure.

[0019] Description of Reference Numerals

[0020] 1-shell; 2-inlet pipe; 210-first tube body; 220-second tube body; 3-pressure reducing valve; 4-connecting pipe; 410-second adjusting nut; 5-flow meter; 6-outlet pipe; 610-third tube body; 620-fourth tube body; a-first quick-connect connector; b-second quick-connect connector; c-third quick-connect connector; 7-limiting assembly; 710-first adjusting threaded tube; 720-limiting screw; 721-limiting part; 7211-clamping surface. DETAILED DESCRIPTION

[0021] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0022] In the present disclosure, unless otherwise specified, directional words such as "inside" and "outside" refer to the inside and outside relative to the outline of the structure or component itself; "first, second" and the like are intended to distinguish one element from another and have no order or importance. In addition, the same figure numbers in different reference drawings represent the same elements, and repeated figure numbers in the same drawing also represent the same elements.

[0023] In a first aspect of the present disclosure, a backflush device is provided, referring to Figure 1 and Figure 2 As shown, the back-blowing device includes a shell 1, and an air inlet pipe 2, a pressure reducing valve 3, a connecting pipe 4, a flow meter 5 and an air outlet pipe 6 which are connected in sequence. The pressure reducing valve 3, the connecting pipe 4 and the flow meter 5 are all arranged in the shell 1, and the air inlet pipe 2 and the air outlet pipe 6 are respectively penetrated through the shell 1. The air inlet pipe 2 is used to connect to the air source, and the air outlet pipe 6 is used to purge the sampling pipeline.

[0024] Through the above scheme, i.e., the back-blowing device provided by the present disclosure, the housing 1 can centrally manage and store the air inlet pipe 2, the pressure reducing valve 3, the connecting pipe 4, the flow meter 5, and the air outlet pipe 6, which is convenient for personnel inspection and management, and the housing 1 can provide a protective effect to protect the pressure reducing valve 3 and the flow meter 5. In addition, due to the arrangement of the housing 1, the air inlet pipe 2, the connecting pipe 4, and the air outlet pipe 6 can reduce the bending and shaking caused by the high wind pressure inside the pipe to a certain extent during the purge process, thereby reducing the occurrence of rupture and leakage due to aging of the pipe.

[0025] The pressure reducing valve 3 inside the housing 1 can adjust the purge pressure, and the flow rate of the purge air passing through the air inlet pipe 2 and the connecting pipe can be monitored by the flow meter 5 .

[0026] In some embodiments, reference Figure 1 As shown, the pressure reducing valve 3 and the air inlet pipe 2 and the pressure reducing valve 3 and the connecting pipe 4 are connected through the first quick-plug connector a; and / or, the flow meter 5 and the air outlet pipe 6 and the flow meter 5 and the connecting pipe 4 are connected through the second quick-plug connector b. In this way, the first quick-plug connector a can play the role of increasing the pipeline support node, that is, the support node can be added between the pressure reducing valve 3 and the air inlet pipe 2 and between the pressure reducing valve 3 and the connecting pipe 4, thereby improving the support stability of the air inlet pipe 2 and the connecting pipe 4 inside the housing 1, and the first quick-plug connector a can also facilitate the replacement of the air inlet pipe 2 and the connecting pipe 4, improving the convenience of replacing the pipeline; similarly, the second quick-plug connector b can also play the role of increasing the pipeline support node, and the support node can be added between the flow meter 5 and the air outlet pipe 6 and between the flow meter 5 and the connecting pipe 4, thereby improving the support stability of the air outlet pipe 6 and the connecting pipe 4 inside the housing 1, and the second quick-plug connector b can also facilitate the replacement of the air outlet pipe 6 and the connecting pipe 4, improving the convenience of replacing the pipeline.

[0027] It should be noted that the first quick-connect connector a and the second quick-connect connector b mentioned in the above specific embodiments can be arranged using existing quick-connect connectors in the relevant technology. For example, the quick-connect connector can be a metal quick-connect connector or a rubber quick-connect connector with interfaces at both ends that can be inserted into the pipeline, etc. The present disclosure does not make specific limitations on this.

[0028] In addition, in the above specific embodiments, the specific structure of the first quick-connect connector a and the second quick-connect connector b can also select a quick-connect connector of a suitable shape according to the internal space of the housing 1, and the present disclosure does not make specific limitations on this. For example, refer to Figure 1 As shown, the first quick-connect connector a can be a straight quick-connect connector, and the second quick-connect connector b can be a quick-connect connector with an elbow.

[0029] In some embodiments, reference Figure 1As shown, the air inlet pipe 2, the air outlet pipe 6 and the connecting pipe 4 are constructed as a metal pipe body. In this way, the hard metal pipe body has the advantages of high temperature resistance and long service life, and can also play a certain supporting role for the pressure reducing valve 3 and the flow meter 5 in the housing 1, which can reduce the degree of dependence of the pressure reducing valve 3 and the flow meter 5 on other supporting components, and is also convenient for operation when replacing the pipeline. The metal pipe body can be selected from any suitable metal material according to the actual application scenario of the back-blowing device. For example, the metal pipe body can be a high-temperature resistant copper pipe or steel pipe, or an oxidation-resistant aluminum pipe, etc., and the present disclosure does not make specific restrictions on this. In addition, the metal pipe body can also improve the structural strength of the back-blowing device, making the back-blowing device less likely to break.

[0030] In some embodiments, reference Figure 1 As shown, the air inlet pipe 2 includes a first tube body 210 located inside the shell 1 and a second tube body 220 located outside the shell 1, and the first tube body 210 and the second tube body 220 are connected via a third quick-plug connector c on the shell 1; and / or, the air outlet pipe 6 includes a third tube body 610 located inside the shell 1 and a fourth tube body 620 located outside the shell 1, and the third tube body 610 and the fourth tube body 620 are connected via another third quick-plug connector c on the shell 1. In this way, the third quick-plug connector c can serve to add support nodes to the air inlet pipe 2 and / or the air outlet pipe 6 for better support, and the air inlet pipe 2 and / or the air outlet pipe 6 are constructed as a segmented structure, which can make it easier to replace or repair the air inlet pipe 2 and / or the air outlet pipe 6. That is, when one or more of the first tube body 210, the second tube body 220, the third tube body 610 and the fourth tube body 620 leak or age and need to be repaired or replaced, they only need to be unplugged from the corresponding third quick-plug connector c for repair and replacement, saving time and material costs.

[0031] And, reference Figure 1 As shown, the air inlet pipe 2 and the air outlet pipe 6 can be arranged vertically and parallel to each other. The air inlet pipe 2 and the air outlet pipe 6 that are parallel to each other can improve the supporting strength of the pressure reducing valve 3 and the flow meter 5.

[0032] In some embodiments, reference Figure 1 As shown, the flow meter 5 is constructed as a gas float flow meter. In this way, the gas float flow meter can have higher sensitivity, and can accurately identify the flow of the purge air passing through the connecting pipe 4, so that the staff can read the readings more accurately to determine the wind flow rate, so as to monitor the air volume.

[0033] In some embodiments, reference Figure 1 As shown, the connecting pipe 4 is constructed as a bellows. In this way, the bellows has good flexibility, that is, it can be flexibly bent according to the internal space of the shell 1, for example, Figure 1As shown, the bellows can be bent into a U shape in the housing 1, and when there is an installation error or tolerance in the air inlet pipe 2 and / or the air outlet pipe 6, the bellows can be deformed to complete the assembly, which has better applicability. The bellows can be a metal bellows, which has higher strength and durability.

[0034] In some embodiments, reference Figure 1 and Figure 2 As shown, the back-blowing device further includes a limit assembly 7, one end of which is connected to one end of the connecting pipe 4 close to the flow meter 5, and the other end is connected to the other end of the connecting pipe 4 close to the pressure reducing valve 3. In this way, the limit assembly 7 can be connected to both ends of the connecting pipe 4, thereby more stably arranging the pressure reducing valve 3 and the flow meter 5 inside the housing 1, thereby improving the installation stability of the equipment inside the housing 1 of the back-blowing device.

[0035] In some embodiments, reference Figure 1 and Figure 2 As shown, the limit assembly 7 includes a first adjusting threaded tube 710 and two limit screws 720, the thread rotation directions of the two limit screws 720 are opposite, one end of one limit screw 720 is threadedly connected to the first end of the first adjusting threaded tube 710, and the other end is provided with a limit portion 721 connected to the end of the connecting tube 4 close to the flow meter 5, one end of the other limit screw 720 is threadedly connected to the second end of the first adjusting threaded tube 710, and the other end is provided with a limit portion 721 connected to the end of the connecting tube 4 close to the pressure reducing valve 3, and the two limit screws 720 are moved closer to or away from each other through the rotation of the first adjusting threaded tube 710. Through this arrangement, the limit assembly 7 can adaptively rotate the first adjusting threaded tube 710 according to the internal space of the shell 1 to control the two limit screws 720 to approach or move away from each other. Since the two limit parts 721 are respectively connected to one end of the connecting pipe 4 close to the flow meter 5 and the other end close to the pressure reducing valve 3, the connecting pipe 4 can indirectly adjust the distance between the pressure reducing valve 3 and the flow meter 5 by the two limit parts 721 approaching or moving away from each other. In this way, when using pressure reducing valves 3 and flow meters 5 of different specifications and sizes, the limit assembly 7 can reasonably allocate the occupied space in the shell 1 so that the pressure reducing valve 3 and the flow meter 5 can be arranged in the shell 1 in a suitable arrangement. In addition, the limit screw 720 itself can also rotate relative to the first adjusting threaded tube 710, thereby guiding the connecting pipe 4.

[0036] It should be noted that the limit assembly 7 can also be arranged inside the shell 1 in any other suitable manner and limit the pressure reducing valve 3 and the flow meter 5. In other embodiments not shown in the figure, the limit assembly 7 can also be magnetically attracted to the inner wall of the shell 1 at one end and fixedly connected to the two ends of the connecting pipe 4 at the other end, so that the connecting pipe 4 can be placed inside the shell 1 in any suitable form, and the pressure reducing valve 3 and the flow meter 5 can be arranged inside the shell 1 in a suitable manner to operate the backblowing device normally.

[0037] In addition, the limiting portion 721 mentioned in the above specific embodiment can also be connected to the connecting pipe 4 in any form. For example, the limiting portion 721 can be a limiting sleeve that is sleeved on the outer wall of the connecting pipe 4 or a clamping member that at least partially clamps the outer wall of the connecting pipe 4.

[0038] In some embodiments, reference Figure 1 and Figure 2 As shown, the connecting pipe 4 is provided with a second adjusting nut 410, and the limiting portion 721 includes a plurality of clamping surfaces 7211 that can fit on the outer wall of the second adjusting nut 410. In this way, the second adjusting nut 410 fits on the clamping surface 7211, and the connecting pipe 4 can more stably limit the relative position of the pressure reducing valve 3 and the flow meter 5. For example, it can be combined with Figure 1 and Figure 2 As shown, the limiting portion 721 can be a wrench that can be clamped on the outer wall of the second adjusting nut 410, and a plurality of clamping surfaces 7211 are naturally formed on the inner side of the wrench. Under this arrangement, the plurality of clamping surfaces 7211 can all be attached to the outer wall of the second adjusting nut 410, thereby clamping the second adjusting nut 410 to indirectly limit the connecting tube 4.

[0039] The second aspect of the present disclosure provides a furnace purge system, including an air source and the back-blowing device mentioned in the above-mentioned specific embodiment, the air inlet pipe 2 of the back-blowing device is connected to the air source, the air outlet pipe 6 of the back-blowing device is used to purge the sampling pipeline, the back-blowing device also has all the beneficial effects of the above-mentioned specific embodiments, and in the furnace purge system, the air source can be any equipment that can produce air, such as a blower or a hair dryer, and the sampling pipeline is the pipeline of the furnace negative pressure measuring point in the related technology, which is not elaborated in the present disclosure. When purging is performed through the furnace purge system, the stability of the purge can be improved so that the furnace can maintain normal operation for a long time.

[0040] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0041] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0042] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A backflush device, characterized in that: It includes a shell, and an air inlet pipe, a pressure reducing valve, a connecting pipe, a flow meter and an air outlet pipe which are connected in sequence. The pressure reducing valve, the connecting pipe and the flow meter are all arranged in the shell. The air inlet pipe and the air outlet pipe are respectively passed through the shell. The air inlet pipe is used to connect to the air source, and the air outlet pipe is used to purge the sampling pipeline.

2. The backflush device according to claim 1, characterized in that: The pressure reducing valve and the air inlet pipe are connected to each other through a first quick-connect connector; and / or the flow meter and the air outlet pipe are connected to each other through a second quick-connect connector.

3. The backflush device according to claim 1, characterized in that: The air inlet pipe, the air outlet pipe and the connecting pipe are constructed as metal pipe bodies.

4. The backflush device according to claim 1, characterized in that: The air intake pipe comprises a first tube body located inside the housing and a second tube body located outside the housing, the first tube body and the second tube body being connected via a third quick-connect connector on the housing; and / or, The air outlet pipe includes a third tube body located inside the shell and a fourth tube body located outside the shell, and the third tube body and the fourth tube body are connected through another third quick-plug connector on the shell.

5. The backflush device according to claim 1, characterized in that: The flow meter is configured as a gas float flow meter.

6. The backflush device according to claim 1, characterized in that: The connecting pipe is configured as a bellows.

7. The backflush device according to claim 6, characterized in that: The back-blowing device further comprises a limit assembly, one end of which is connected to one end of the connecting pipe close to the flow meter, and the other end of which is connected to the other end of the connecting pipe close to the pressure reducing valve.

8. The backflush device according to claim 7, characterized in that: The limiting component comprises: a first adjusting threaded tube; and Two limit screws, the thread rotation directions of the two limit screws are opposite, one end of one of the limit screws is threadedly connected to the first end of the first adjusting threaded tube, and the other end is provided with a limit part connected to the end of the connecting tube close to the flow meter, one end of the other limit screw is threadedly connected to the second end of the first adjusting threaded tube, and the other end is provided with a limit part connected to the end of the connecting tube close to the pressure reducing valve, and the two limit screws are moved closer to or away from each other by rotating the first adjusting threaded tube.

9. The backflush device according to claim 8, characterized in that: The connecting pipe is provided with a second adjusting nut, and the limiting portion includes a plurality of clamping surfaces that can be fitted to the outer side wall of the second adjusting nut.

10. A furnace purge system, characterized in that: It comprises an air source and a back-blowing device as described in any one of claims 1 to 9, wherein an air inlet pipe of the back-blowing device is connected to the air source, and an air outlet pipe of the back-blowing device is used for purging a sampling pipeline.

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