Integrated filtering, exhausting and cleaning device for heating pipeline

Abstract

The invention discloses an integrated filtering, exhausting and cleaning device for a heating pipeline, and relates to the technical field of heating pipelines. The integrated filtering, exhausting and cleaning device for the heating pipeline comprises a water passing pipeline, and a shut-off valve is arranged on the water passing pipeline and used for controlling on-off of the water passing pipeline; the blow-off pipeline is arranged at the bottom of the water passing pipeline, the blow-off pipeline and the water passing pipeline are communicated, the blow-off pipeline is located on the downstream side of the shut-off valve, and a blow-off valve is arranged on the blow-off pipeline; the filtering assembly is arranged in the blow-off pipeline, and the filtering assembly separates the water passing pipeline at the blow-off pipeline; the exhaust pipeline is arranged at the top of the water passing pipeline, the exhaust pipeline and the water passing pipeline are communicated, the exhaust pipeline is located on the downstream side of the blow-off pipeline, and an exhaust valve is arranged on the exhaust pipeline; and the automatic exhaust assembly is arranged at the end part of the downstream side of the exhaust pipeline.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heating pipeline, in particular to an integrated filtering and exhaust cleaning device for a heating pipeline. BACKGROUND

[0002] In the current heating pipeline system, the functions of pipeline filtering, exhaust and the like are mostly realized by independent components, which have the following technical defects:

[0003] Low integration and complicated installation and maintenance: the existing filtering device and exhaust device are mostly of a dispersed structure, which needs to be arranged and connected by multiple nodes, not only occupying a large space of the pipeline, but also increasing the risk of leakage; and different components need to be operated respectively during maintenance, which is complicated. Poor cleaning effect of the filtering device: the traditional filtering device only supports forward blowdown (opening the bottom valve to discharge impurities), but the stubbornly attached impurities on the surface of the filter screen are difficult to completely remove, which may cause the filtering efficiency to decrease after long-term use, and the filter screen needs to be disassembled for cleaning, which is high in operation cost. Installation limitation of the exhaust device: the conventional automatic exhaust device needs to be installed at the highest position of the pipeline network according to the principle of "gas going to high places"; in a complex pipeline (such as a scene with narrow space and compact pipeline layout), it is difficult to effectively arrange due to the position limitation, and the exhaust may not be complete. Metal components are prone to scaling and rusting: the existing pipeline fittings are mostly made of cast iron, copper and other metal materials, which are affected by the heating water quality (such as impurities and pH fluctuation), and are prone to scaling and rusting, which not only shortens the service life, but also may block the pipeline and jam the valve. Low bubble removal efficiency: in the existing filtering device, bubbles are prone to accumulate on the surface of the filter screen, but due to the separation of the filtering and exhaust components, the accumulated bubbles cannot be timely discharged, which may cause "gas blockage" of the pipeline network and reduce the heating circulation efficiency. High maintenance cost: frequent replacement of metal components and multi-node maintenance of dispersed devices increase the operation and maintenance cost and labor input of the heating system. SUMMARY

[0004] To this end, the embodiment of the present application provides an integrated filtering and exhaust cleaning device for a heating pipeline to solve the problem that in the existing filtering device, bubbles are prone to accumulate on the surface of the filter screen, but due to the separation of the filtering and exhaust components, the accumulated bubbles cannot be timely discharged, which may cause "gas blockage" of the pipeline network and reduce the heating circulation efficiency.

[0005] In order to achieve the above-mentioned purpose, the embodiment of the present application provides the following technical scheme:

[0006] An integrated filtering and exhaust cleaning device for a heating pipeline, comprising:

[0007] A water passage pipeline, a valve is arranged on the water passage pipeline, for controlling the on-off of the water passage pipeline;

[0008] A blowdown pipeline is arranged at the bottom of the water pipeline and is connected to the water pipeline. The blowdown pipeline is located downstream of the shut-off valve. A blowdown valve is arranged on the blowdown pipeline.

[0009] A filter assembly is arranged inside the blowdown pipeline. The filter assembly separates the water pipeline from the blowdown pipeline.

[0010] An exhaust pipeline is arranged at the top of the water pipeline and is connected to the water pipeline. The exhaust pipeline is located downstream of the blowdown pipeline. An exhaust valve is arranged on the exhaust pipeline.

[0011] An automatic exhaust assembly is arranged at the end of the exhaust pipeline.

[0012] Optionally, the filter assembly comprises a first filter screen arranged upstream of the blowdown valve. The outer diameter of the first filter screen is matched with the inner diameter of the blowdown pipe. The first filter screen is fixedly connected to the inner wall of the blowdown pipe.

[0013] The upper section of the first filter screen is arranged in the water pipeline. The first filter screen separates the water pipeline along the water flow direction. The lower section of the first filter screen is arranged in the blowdown pipeline.

[0014] Optionally, the automatic exhaust assembly comprises an automatic exhaust valve fixedly connected to the end of the exhaust pipe.

[0015] The automatic exhaust valve comprises a valve body. An accommodation cavity is arranged inside the valve body. An exhaust hole is arranged on the top of the valve body and is connected to the inside of the valve body. A float ball is arranged in the accommodation cavity of the valve body. A guide column is arranged on the inner wall of the valve body and extends axially towards the top of the valve body. A hollow cavity is arranged in the bottom end of the float ball and is matched with the guide column. The guide column is inserted into the hollow cavity. The float ball is slidably connected to the guide column. A water inlet hole is arranged on the bottom of the valve body and penetrates the bottom of the valve body. A sealing ring is arranged on the upper half of the float ball. The sealing ring is fixedly connected to the float ball. The top end of the accommodation cavity is arranged in an arc shape.

[0016] Optionally, a sound-absorbing sheet with a microporous structure is arranged in the exhaust hole of the top end of the valve body. The sound-absorbing sheet is detachably connected to the valve body.

[0017] Optionally, an embedding groove is arranged on the bottom of the valve body and is matched with the outer diameter of the exhaust pipeline. The valve body is fixedly connected to the exhaust pipeline through the embedding groove.

[0018] A second filter screen is arranged in the embedding groove and separates the water inlet hole from the exhaust pipeline.

[0019] Optionally, the vent hole is configured as a flushing interface adapted to the flushing device for connecting an external flushing device to perform backflushing on the inside of the pipeline.

[0020] Optionally, the extended axis of the exhaust pipe is arranged to intersect the axis of the sewage pipe, so that the backwash water flow of the exhaust pipe directly washes the first filter screen in the sewage pipe.

[0021] Optionally, the water supply pipe, the exhaust pipe, and the sewage pipe are integrally formed.

[0022] Optionally, the water supply pipe, the exhaust pipe, and the sewage pipe are all made of PE material.

[0023] Optionally, a transition section is provided between the sewage pipe and the water pipe, and the transition section connects the water pipe and the sewage pipe.

[0024] The present invention has at least the following beneficial effects:

[0025] This invention integrates the shut-off valve, filter assembly, automatic venting assembly, drain valve, and exhaust valve into one unit, reducing the space occupied by the device, simplifying pipeline connections, and reducing the risk of leakage. At the same time, the direct-connection design of the pipeline between the filter assembly and the automatic venting assembly allows air bubbles accumulated at the filter assembly to directly enter the exhaust pipeline for discharge, avoiding "air blockage" and ensuring heating circulation efficiency. Attached Figure Description

[0026] To more clearly illustrate the prior art and the present invention, the accompanying drawings used in the description of the prior art and the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other drawings from the provided drawings without any creative effort.

[0027] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed herein.

[0028] Figure 1 This is a first-view structural diagram of an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of a second-view structure according to an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of a third-view structure according to an embodiment of the present invention;

[0031] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure of section AA;

[0032] Figure 5 for Figure 4 Enlarged structural diagram of section B.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Water supply pipeline; 2. Shut-off valve; 3. Sewage pipeline; 4. Sewage valve; 5. Vent pipeline; 6. Vent valve; 7. Automatic vent valve; 71. Valve body; 72. Receiving cavity; 73. Vent hole; 74. Float ball; 75. Guide column; 76. Float hollow cavity; 77. Water inlet; 78. Sealing ring; 79. Silencing plate; 710. Second filter screen; 8. First filter screen. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0036] In the description of this invention, unless otherwise stated, "a plurality of" means two or more. The terms "first," "second," "third," "fourth," etc. (if present), in the specification, claims, and accompanying drawings of this invention are intended to distinguish the objects referred to. For schemes with a sequential flow, this terminology need not be construed as describing a specific order or sequence; for schemes with device structures, this terminology does not distinguish between matters of importance or positional relationships.

[0037] Furthermore, the terms “comprising,” “having,” and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are expressly listed, but may also include other steps or units that are not expressly listed but are inherent to these processes, methods, products, or apparatuses, or steps or units added based on further optimizations of the inventive concept.

[0038] like Figures 1-5 As shown, this invention discloses an integrated filtration and exhaust cleaning device for heating pipes, comprising:

[0039] A water supply pipeline 1 is provided, and a shut-off valve 2 is provided on the water supply pipeline 1 to control the opening and closing of the water supply pipeline 1;

[0040] A blowdown pipeline 3 is arranged at the bottom of the water pipeline 1 and is communicated with the water pipeline 1. The blowdown pipeline 3 is located at the downstream side of the shut-off valve 2. A blowdown valve 4 is arranged on the blowdown pipeline 3.

[0041] A filter assembly is arranged in the blowdown pipeline 3 and separates the water pipeline 1 at the blowdown pipeline 3.

[0042] An exhaust pipeline 5 is arranged at the top of the water pipeline 1 and is communicated with the water pipeline 1. The exhaust pipeline 5 is located at the downstream side of the blowdown pipeline 3. An exhaust valve 6 is arranged on the exhaust pipeline 5.

[0043] An automatic exhaust assembly is arranged at the end of the downstream side of the exhaust pipeline 5.

[0044] In the embodiment, the water pipeline 1 can be arranged as a bent pipe or a straight pipe according to requirements. The blowdown pipeline 3 and the exhaust pipeline 5 are arranged at the upper and lower sides respectively. When installed, the exhaust pipeline 5 is arranged above and the blowdown pipeline 3 is arranged below. The shut-off valve 2 is used as a total valve switch of the water pipeline 1. The blowdown valve 4 is used as a valve of the blowdown pipeline 3 and is opened during blowdown and closed during normal operation. The exhaust valve 6 is used as a valve of the exhaust pipeline 5 and is opened during normal operation and automatic exhaust. The exhaust valve 6 is also used as a backwashing pipeline and is opened during backwashing, the blowdown valve 4 is opened, and the shut-off valve 2 is closed.

[0045] The filter assembly is arranged in the blowdown pipeline and a part of the filter assembly is also arranged in the water pipeline 1 to filter the water flow in the pipeline. The automatic exhaust assembly is arranged on the exhaust pipeline 5. When water flows in the water pipeline 1, the air in the water flow enters the exhaust pipeline 5 upwardly and is exhausted from the automatic exhaust assembly.

[0046] In a further specific embodiment, the filter assembly comprises a first filter screen 8 arranged at the upstream side of the blowdown valve 4. The outer diameter of the first filter screen 8 is matched with the inner diameter of the blowdown pipeline. The first filter screen 8 is fixedly connected to the inner wall of the blowdown pipeline.

[0047] The upper section of the first filter screen 8 is arranged in the water pipeline 1. The first filter screen 8 separates the water pipeline 1 along the water flow direction. The lower section of the first filter screen 8 is arranged in the blowdown pipeline 3.

[0048] The filter assembly is the first filter screen 8 arranged in the water pipeline 1 and the blowdown pipeline 3. The first filter screen 8 is a tubular structure and is fixedly installed in the blowdown pipeline 3. The top end of the first filter screen 8 is arranged in the water pipeline 1 to separate the upstream and downstream of the water pipeline 1 and filter the water flowing in the water pipeline 1.

[0049] In a still further specific embodiment, the automatic exhaust assembly comprises an automatic exhaust valve 7 fixedly connected to the end of the exhaust pipe.

[0050] The automatic exhaust valve 7 comprises a valve body 71, the inside of the valve body 71 is provided with a containing cavity 72, the top of the valve body 71 is provided with an exhaust hole 73 communicating with the inside, the containing cavity 72 of the valve body 71 is provided with a float ball 74, the bottom of the inner wall of the valve body 71 extends along the axial direction of the valve body 71 to the side of the top of the valve body 71 and is provided with a guide column 75, the bottom end of the float ball 74 is provided with a float hollow cavity 76 matched with the guide column 75, the guide column 75 is inserted into the float hollow cavity 76, the float ball 74 is slidably connected with the guide column 75, the bottom of the valve body 71 is provided with a water inlet hole 77 penetrating through the bottom of the valve body 71 at the circumferential side of the guide column 75, the upper half of the circumferential side of the float ball 74 is provided with a sealing ring 78 fixedly connected with the float ball 74, and the top end of the containing cavity 72 is provided with an arc structure.

[0051] The valve body 71 is made of nylon material, which can reduce the problems of fouling, rusting and blocking of the valve body 71, and significantly prolong the service life of the valve. In some embodiments, the valve body 71 can be provided in a split type or as a whole, the valve body 71 forms a containing cavity 72 inside, the float ball 74 is provided in the containing cavity 72, the float ball 74 has an ellipsoidal structure, the guide column 75 is provided at the bottom of the inner wall of the valve body 71 towards the side of the top of the valve body 71, the guide column 75 is integrally formed with the valve body 71, the guide column 75 has a hollow tubular structure and communicates with the outside of the lower valve body 71, the bottom end of the float ball 74 is provided with a float hollow cavity 76 along the long axis direction, the guide column 75 is placed in the float hollow cavity 76 and matched with the float hollow cavity 76, which can avoid the float ball 74 from shaking, and the float ball 74 can float up and down along the guide column 75, the bottom of the valve body 71 is provided with a through hole as a water inlet hole 77 at the circumferential side of the guide column 75, the water inlet hole 77 communicates with the inside and outside of the lower valve body 71, so that water can enter the containing cavity 72 inside the valve body 71 through the through hole to make the float ball 74 float up.

[0052] The sealing ring 78 is provided between the top end of the circumferential side of the float ball 74 and the inner side wall of the valve body 71, the sealing ring 78 is fixedly connected with the float ball 74, the sealing ring 78 is in contact with the arc surface of the inner side wall of the upper valve body 71 when the float ball 74 floats up, which can prevent water from flowing out of the valve body 71, and the float ball 74 falls down when exhaust, and gas is discharged from the exhaust hole 73 along the gap between the float ball 74 and the valve body 71.

[0053] The float ball 74 is guided by the guide column 75 to prevent shaking, and the float ball 74 is sealed by the sealing ring 78 and the inner wall of the upper valve body 71 when the float ball 74 floats, thereby preventing water from flowing out of the valve body 71.

[0054] In some other embodiments, the outer circumferential side of the float ball 74 can be provided with annular weight-reducing grooves, and the weight-reducing grooves are arranged at intervals on the circumferential side of the float ball 74. Through the weight-reducing grooves, the weight of the float ball 74 can be reduced, and air can be stored in the weight-reducing grooves to increase the buoyancy.

[0055] In further embodiments, the bottom of the valve body 71 is upwardly recessed to form an embedding groove, and a port connecting insert is embedded on the side wall of the embedding groove and fixedly connected. The port connecting insert is used to connect the exhaust pipeline 5, and the exhaust pipeline 5 is connected and fixed with the threaded groove in the inner wall of the port connecting insert. A second filter screen 710 is also arranged in the embedding groove, and the second filter screen 710 separates the water inlet hole 77 from the exhaust pipeline 5 to prevent dirt or other contaminants in the pipeline from entering the valve body 71.

[0056] In addition, in order to facilitate the installation of the valve body 71, the circumferential side of the valve body 71 is also provided with anti-slip lines, which are arranged in the vertical direction and perpendicular to the rotation direction of the valve body 71, to facilitate operation.

[0057] In further embodiments, the exhaust hole 73 is arranged and designed with a large aperture to improve the exhaust efficiency of the pipeline air and ensure efficient operation of the pipeline system. In addition, the exhaust hole 73 can be provided with an exhaust muffling sheet 79 with a microporous structure, which can effectively reduce the noise during the exhaust process without affecting the exhaust effect.

[0058] In further specific embodiments, the exhaust hole 73 is arranged as a flushing interface matched with the flushing device, which is used to externally connect the flushing device to backwash the inside of the pipeline.

[0059] The exhaust hole 73 can be externally connected to the flushing device, which can be used to externally connect the flushing device to inject water from the exhaust hole 73, so that the water flow enters the exhaust pipeline 5 through the water inlet hole 77 at the bottom end of the valve body 71, and backwashes the first filter screen 8 and the second filter screen 710 through the exhaust pipeline 5, thereby realizing the combined cleaning mode of "forward pollution discharge + reverse flushing". That is, the daily forward impurity discharge can be completed through the pollution valve 4, and the first filter screen 8 and the exhaust assembly inside the second filter screen 710 can be simultaneously cleaned by externally connecting the water pipe of the automatic exhaust assembly and using the water flow to backwash them, without the need for disassembly.

[0060] In addition, in order to improve the flushing effect, the axis extension line of the exhaust pipeline 5 intersects with the axis of the blowdown pipeline 3, so that the backwashing water flow of the exhaust pipeline 5 directly flushes the first filter screen 8 in the blowdown pipeline 3.

[0061] The arrangement of the blowdown pipeline 3 and the exhaust pipeline 5 can directly flush the first filter screen 8 by the backwashing water flow in the exhaust pipeline 5, improve the flushing effect, and also can reduce the size of the device to some extent. The shut-off valve 2, the filter assembly, the automatic exhaust assembly, and the blowdown valve 4 are integrated, the space occupied by the device is reduced, the pipeline connection is simplified, and the risk of leakage is reduced. In addition, the automatic exhaust function is no longer dependent on the installation at the highest point of the pipe network, and the device can be arranged at any position of the heating pipe network, which adapts to the spatial layout requirements of complex pipelines. Through the pipeline direct connection design of the filter device and the exhaust device, the bubbles accumulated at the filter screen can directly enter the exhaust pipeline 5 and be discharged, avoiding "air blockage" and ensuring the heating circulation efficiency.

[0062] In a further specific embodiment, the water pipeline 1, the exhaust pipeline 5, and the blowdown pipeline 3 are integrally formed. The water pipeline 1, the exhaust pipeline 5, and the blowdown pipeline 3 are all made of PE material.

[0063] The above-mentioned pipelines are integrally cast by PE material, which has the characteristics of anti-fouling, corrosion resistance, and no electrochemical corrosion, greatly prolonging the service life of the device and reducing the frequency of part replacement.

[0064] A transition section is arranged between the blowdown pipeline 3 and the water pipeline 1, which connects the water pipeline 1 and the blowdown pipeline 3.

[0065] The above-mentioned transition section can increase the connection between the blowdown pipeline 3 and the water pipeline 1, improve the filtering area of the first filter screen 8, and facilitate cleaning of the first filter screen 8.

[0066] The effect of the embodiment of the present application is that:

[0067] 1. Functional integration: The shut-off valve 2, the filter device, the automatic exhaust device, and the blowdown valve are integrated, which reduces the space occupied by the device, simplifies the pipeline connection, and reduces the risk of leakage.

[0068] 2. Forward and reverse double cleaning: The combination cleaning method of "forward blowdown + reverse flushing" is realized, which can complete the daily forward impurity discharge through the blowdown valve, and can also complete the deep cleaning by connecting the water pipe to the automatic exhaust device and using the water flow to flush the filter screen and the internal part of the exhaust device in the reverse direction without disassembly.

[0069] 3. Breakthrough installation position limitation: The automatic exhaust function is no longer dependent on the installation at the highest point of the pipe network, and the device can be arranged at any position of the heating pipe network, which adapts to the spatial layout requirements of complex pipelines.

[0070] 4. Prolonged service life: The device is made of PE material and is integrally cast, which greatly prolongs the service life of the device and reduces the frequency of part replacement due to its anti-fouling, corrosion-resistant, and non-electrochemical corrosion properties;

[0071] 5. Improved exhaust efficiency: The direct connection of the filter device and the exhaust device through the pipeline design allows the bubbles accumulated in the filter screen to directly enter the exhaust pipeline 5 for discharge, avoiding "air blockage" and ensuring the efficiency of the heating circulation;

[0072] 6. Simplified operation and maintenance: The cleaning and exhaust process does not require disassembly of parts, and can be completed by simply opening and closing the valve, reducing the user's maintenance operation threshold and time cost;

[0073] 7. Lightweight and easy to install: The density of PE material is much lower than that of metal, and the overall weight of the device is light, so heavy tools are not required during installation, which can greatly save construction time.

[0074] The above several specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in some embodiments.

[0075] The technical features of the above embodiments can be combined arbitrarily (as long as the combination of these technical features does not contradict), and in order to make the description concise, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written should also be considered as the scope of the present application.

[0076] The above embodiments are described in detail through general description and specific embodiments. It should be noted that without departing from the concept of the present application, it is obvious that the specific embodiments can be modified and improved, and these are within the scope of the present application. Therefore, the scope of protection of the present application should be subject to the appended claims.

Claims

1. An integrated filter exhaust purge device for a heating duct, comprising: The utility model relates to a sewage discharge device of water purifying device, including: Water pipeline, the water pipeline is provided with the valve of closing and opening for controlling the water pipeline's on-off; Sewage pipeline, the sewage pipeline is located the bottom of water pipeline and is communicated with each other, and the sewage pipeline is located the downstream side of the valve of closing and opening, and the sewage pipeline is provided with sewage valve; Filter assembly, the filter assembly is arranged in the sewage pipeline, and the filter assembly is separated from the water pipeline at the sewage pipeline; Exhaust pipeline, the exhaust pipeline is arranged at the top of water pipeline and is communicated with each and is located the downstream side of the sewage pipeline, and the exhaust pipeline is provided with exhaust valve; Automatic exhaust assembly, the exhaust assembly is arranged at the end of the downstream side of exhaust pipeline.

2. An integrated filtration and vent purging device for a heating pipe as defined in claim 1, characterized in that: The filter assembly includes a first filter screen, which is arranged on the upstream side of the sewage valve, and the outer diameter of the first filter screen is matched with the inner diameter of the sewage pipe. The first filter screen is fixedly connected to the inner wall of the sewage pipe. The upper section of the first filter screen is placed in the water pipeline, and the first filter screen separates the water pipeline along the water flow direction. The lower section of the first filter screen is placed in the sewage pipeline.

3. An integrated filtration and vent purging device for a heating pipe as defined in claim 1, wherein: The automatic exhaust assembly includes an automatic exhaust valve, which is fixedly connected to the end of the exhaust pipe. The automatic exhaust valve includes a valve body with an accommodation cavity in the interior. An exhaust hole is formed in the top of the valve body to communicate with the interior. A float ball is arranged in the accommodation cavity of the valve body. A guide column is arranged on the inner wall of the valve body and extends axially towards the top of the valve body. A hollow cavity is formed in the bottom end of the float ball and matched with the guide column. The guide column is inserted into the hollow cavity, and the float ball is slidably connected with the guide column. A water inlet hole is formed in the bottom of the valve body and penetrates through the bottom. A sealing ring is arranged on the upper half of the float ball. The sealing ring is fixedly connected with the float ball. The top end of the accommodation cavity is arranged in an arc shape.

4. An integrated filtration and vent purging device for a heating pipe as defined in claim 3, wherein: A sound-absorbing sheet with a microporous structure is arranged in the exhaust hole of the top end of the valve body and detachably connected with the valve body.

5. An integrated filtration and vent purging device for a heating pipe as defined in claim 4, wherein: A recess is formed in the bottom of the valve body and matched with the outer diameter of the exhaust pipeline. The valve body is fixedly connected with the exhaust pipeline through the recess. A second filter screen is arranged in the recess to separate the water inlet hole from the exhaust pipeline.

6. An integrated filtration and vent purging device for a heating pipe as defined in claim 5, wherein: The exhaust hole is arranged as a flushing interface matched with the flushing device to externally connect the flushing device and backwash the interior of the pipeline.

7. An integrated filtration and vent purging device for a heating pipe as defined in claim 1, wherein: The axis extension line of the exhaust pipeline intersects with the axis of the sewage pipeline, so that the backwashing water flow of the exhaust pipeline directly flushes the first filter screen in the sewage pipeline.

8. An integrated filtration and vent purging device for a heating pipe as defined in claim 1, wherein: The water pipeline, the exhaust pipeline, and the sewage pipeline are integrally formed.

9. An integrated filtration and vent purging device for a heating pipe as defined in claim 8, wherein: The water pipeline, the exhaust pipeline, and the sewage pipeline are made of PE material.

10. An integrated filtration and vent purging device for a heating pipe as defined in claim 1, wherein: A transition section is arranged between the sewage pipeline and the water pipeline to communicate the water pipeline with the sewage pipeline.

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