A heating flow regulating valve

Abstract

The present application relates to the technical field of regulating valve, particularly relates to a heating flow regulating valve, including a drive module for controlling the work of the regulating valve; the heating flow regulating valve further includes a valve shell connected at the lower end of the drive module, the valve shell is composed of a shell and a valve cover, and the valve shell is divided into a liquid inlet section, a liquid outlet section, a sealing section and a connecting section. The valve unit adopted by the present application can form a sealed space in the connecting section of the valve shell, completely physically isolating the dynamic seal of the valve stem from the water flow, completely eliminating the dynamic seal leakage channel at the valve stem, and the closed part adopted can adaptively deform with the lifting of the valve stem, always maintaining the seal between the connecting sleeve and the valve stem, avoiding the leakage phenomenon at the dynamic seal after long-term use.

Description

Technical Field

[0001] This invention relates to the field of regulating valve technology, and in particular to a heating flow regulating valve. Background Technology

[0002] Central heating systems are core infrastructure for ensuring urban residents' livelihoods. As a key component for hydraulic balance and flow regulation in the pipeline network, the heating flow regulating valve's operational reliability, sealing durability, regulation accuracy, and ease of maintenance directly affect the heat exchange efficiency, heating balance, and total life cycle cost of the heating system.

[0003] Currently, most traditional heating flow regulating valves used in the industry employ packing seal shut-off or throttling structures. Under conditions of complex heating circulating water quality, periodic temperature fluctuations, fluctuating pipeline pressure, and long-term continuous operation, the reciprocating motion of the regulating valve stem easily wears down the packing. Furthermore, abrasive particles such as mud, sand, and rust in the hot water can penetrate the sealing surface, accelerating the aging and failure of the packing. This not only causes system water loss but also easily leads to electrical safety hazards. In addition, the heating circulating water has high hardness and many impurities, and with alternating hot and cold water temperatures, scale and rust easily accumulate on the sealing surfaces of the valve core and valve seat, gradually forming clumps. Traditional valves lack a matching valve core cleaning structure, and the continuous accumulation of scale can lead to incomplete valve core shut-off, increased internal leakage, increased heat loss and energy consumption, and reduced stability of the regulating valve. Scale that automatically detaches from the valve core can also enter other pipes in the heating system with the water flow and adhere to them, easily causing equipment blockage and reducing the overall heat exchange efficiency of the system.

[0004] Therefore, there is an urgent need to provide a heating flow regulating valve that improves sealing performance, reduces wear and tear, and enhances operational stability. Summary of the Invention

[0005] Therefore, it is necessary to provide a heating flow regulating valve to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention employs the following technical solution: a heating flow regulating valve, comprising: a drive module for controlling the operation of the regulating valve.

[0007] The heating flow regulating valve also includes a valve housing, which is connected to the lower end of the drive module. The valve housing consists of a shell and a cover, and is divided into an inlet section, an outlet section, a sealing section, and a connection section.

[0008] The heating flow regulating valve also includes a valve unit connected within the valve housing connection section. The valve unit includes a connecting sleeve detachably connected within the valve housing connection section. A sealing part is installed inside the connecting sleeve, and a plugging part is installed in the middle of the sealing part. A gap is provided between the plugging part and the top of the connecting sleeve. A scraping part is provided below the sealing part and is fixedly connected to the connecting sleeve. The scraping part is used to scrape off the scale adhering to the plugging part.

[0009] The sealing part includes two connecting rings coaxially distributed inside the connecting sleeve. The connecting ring on the outer side is fixedly connected to the inner wall of the connecting sleeve, and the connecting ring on the inner side is fixedly connected to the sealing part. A sealing membrane is installed between the two connecting rings.

[0010] The heating flow regulating valve also includes a drain unit, which is located inside the valve body sealing section. The drain unit includes a sealing ring located in the middle of the valve body sealing section. The upper and lower ends of the sealing ring are respectively equipped with baffle arc plates, which are symmetrically distributed in the center. A dirt collection part is installed inside the sealing ring, and the lower end of the dirt collection part is connected to the drain part, which is connected to the valve body sealing section.

[0011] At the start of operation, the sealing part blocks the water flow inside the valve body. The plugging part does not need to be tightly fitted with the connecting sleeve. At the same time, the scraping part continuously scrapes the surface of the plugging part. After the operation is completed, the dirt collection part scrapes off the scale on the surface of the scraping part a second time and collects it.

[0012] Preferably, the sealing part includes a valve stem fixedly installed in the inner connecting ring, the valve stem is detachably connected to the drive module, the valve stem slides through the top of the connecting sleeve, a pushing plate is installed at the lower end of the valve stem, a valve core is sleeved on the outer periphery of the pushing plate, and multiple circumferentially evenly distributed limiting plates are installed at the upper end of the valve core.

[0013] Preferably, the sealing part further includes a compression chamber opened in the middle of the valve core. The compression chamber is in the shape of a stepped cylinder. A compression ring is installed on the outer periphery of the compression chamber. Multiple evenly distributed connecting rods are installed in the compression chamber. The multiple connecting rods slide through the pushing disc at the same time.

[0014] Preferably, the scraping part includes a pressure-resistant ring plate installed inside the connecting sleeve and slidingly cooperating with the valve stem. Multiple mounting rods are installed at the lower end of the pressure-resistant ring plate, and a scraping ring is installed at the lower end of the multiple mounting rods. Each limiting plate is located between two adjacent mounting rods.

[0015] Preferably, the dirt collection section includes a dirt collection frame installed inside a sealing ring, and a plurality of circumferentially evenly distributed connecting pipes are installed inside the dirt collection frame. A movable component is connected to the connecting pipe, and a sealing arc plate is installed on the movable component.

[0016] Preferably, the movable component includes a movable rod slidably connected inside the connecting pipe. One end of the movable rod located on the axis of the sludge collection frame is provided with a hemispherical protrusion. A connecting spring is installed between the movable rod and the connecting pipe. A sliding through hole is opened on the upper side of the connecting pipe wall. A fixed rod is slidably connected inside the sliding through hole. The two ends of the fixed rod are fixedly connected to the movable rod and the sealing arc plate, respectively.

[0017] Preferably, the sludge collection frame is composed of two coaxially distributed sludge collection rings and a support ring that is close to the lower end of the two sludge collection rings. The two sludge collection rings are fixedly connected by multiple connecting pipes. A rubber ring is provided at the contact point between the support ring and the sludge collection rings. An annular inclined surface is provided at the upper end of the inner sludge collection ring.

[0018] Preferably, the drain section includes a drain port located at the lower end of the valve body sealing section, a plug cap is detachably installed inside the drain port, and a plurality of circumferentially evenly distributed support rods are installed on the upper end of the plug cap, the support rods being fixedly connected to the support ring.

[0019] Preferably, multiple sealing arc plates are closely attached and spliced ​​to form a sealing ring for sealing the upper port of the sludge collection frame, and sealing rubber is laid at the splicing ends of two adjacent sealing arc plates.

[0020] In summary, the present invention has the following beneficial effects: 1. The valve unit used in the present invention can form a sealed space in the connecting section of the valve body, completely physically isolating the dynamic seal of the valve stem from the water flow, thus completely eliminating the dynamic seal leakage channel at the valve stem. Furthermore, the sealing part can adaptively deform with the rise and fall of the valve stem, always maintaining the seal between the connecting sleeve and the valve stem, avoiding leakage at the dynamic seal after long-term use. Throughout the entire movement of the valve stem, the dynamic seal does not come into contact with the water flow, fundamentally eliminating the wear of the valve stem by abrasive particles such as mud, sand, and rust in the water flow. At the same time, the valve stem and the connecting sleeve use a friction-reducing structure to further reduce the wear of the valve stem, improve the service life of the valve stem and the stability of the valve stem's rise and fall.

[0021] 2. The sealing part and scraping part of this invention work together to scrape the surface of the sealing part while it is working. The scraping part continuously scrapes the outer ring surface of the valve core. With the water flow reversal flushing effect at the scraping ring, the scale and attached impurities on the surface of the valve core can be removed, preventing scale from accumulating and clumping. After the regulating valve is used, the dirt collection part can perform a second precise scraping of the sealing part to remove the scale remaining after the first scraping, ensuring that the sealing part is in a clean state. Combined with the radial expansion structure of the sealing part itself, it ensures that the sealing surface fits tightly.

[0022] 3. The drain section used in this invention can be separated from the valve body, which facilitates the discharge of scale inside the drain section and the cleaning of the valve interior, reduces the risk of scale blockage in the heating pipeline, and improves the operational stability and heat exchange efficiency of the entire heating system. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 A three-dimensional structural schematic diagram of the present invention is shown;

[0025] Figure 2 A front view of the invention is shown;

[0026] Figure 3 A left view of the invention is shown;

[0027] Figure 4 It shows Figure 3 Sectional view of AA;

[0028] Figure 5 It shows Figure 4 Enlarged view of region B in the middle;

[0029] Figure 6 A schematic cross-sectional view of the connecting sleeve, sealing part, plugging part and scraping part of the present invention is shown;

[0030] Figure 7 A schematic cross-sectional view of the sealing ring, baffle plate, dirt collection part, and dirt discharge part of the present invention is shown.

[0031] Figure 8 This diagram illustrates the state of the invention after it has finished working.

[0032] Figure 9 It shows Figure 8 Enlarged view of region C in the middle;

[0033] Figure 10 A schematic diagram of the cleaning state of the present invention is shown;

[0034] Figure 11 It shows Figure 10 A magnified view of region D in the middle.

[0035] The above-mentioned figures include the following reference numerals: 1. Drive module; 2. Valve housing; 3. Valve unit; 30. Connecting sleeve; 31. Sealing part; 310. Connecting ring; 311. Sealing membrane; 32. Sealing part; 320. Valve stem; 321. Pushing disc; 322. Valve core; 323. Limiting plate; 324. Extrusion chamber; 325. Extrusion ring; 326. Connecting rod; 33. Scraper part; 330. Anti-reflective material. 331. Pressure ring plate; 332. Mounting rod; 4. Scraper ring; 5. Sewage discharge unit; 6. Sealing ring; 7. Partition arc plate; 8. Sewage collection part; 9. Sewage collection frame; 10. Connecting pipe; 11. Sealing arc plate; 12. Moving rod; 23. Connecting spring; 24. Sliding through hole; 25. Fixing rod; 26. Sewage discharge part; 27. Sewage discharge port; 28. Sealing cover; 29. ​​Support rod. Detailed Implementation

[0036] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0037] See Figures 1-3 A heating flow regulating valve includes a drive module 1 for controlling the operation of the regulating valve. The drive module 1 consists of a power execution unit (servo motor or stepper motor, reduction mechanism), a motion conversion mechanism (screw and nut pair, guide sliding pair), a position feedback unit (displacement sensor, encoder), a limit and protection mechanism (mechanical limit, elastic buffer), an electrical control signal unit (drive board, terminal block), and a connecting transmission pair (coupling or floating joint); the electrical control signal unit is connected to the electrical signals of the existing control system.

[0038] See Figure 1 and Figure 2 The heating flow regulating valve also includes a valve housing 2 connected to the lower end of the drive module 1. The valve housing 2 consists of a shell and a valve cover. The valve housing 2 is divided into an inlet section, an outlet section, a sealing section and a connecting section. The connecting section of the valve housing 2 is provided with threads.

[0039] See Figure 2 and Figure 4 The heating flow regulating valve also includes a valve unit 3 connected in the connecting section of the valve body 2. The valve unit 3 includes a connecting sleeve 30 that is detachably connected in the connecting section of the valve body 2. The connecting sleeve 30 has threads on its outer periphery.

[0040] See Figure 2 , Figure 4 and Figure 6 The connecting sleeve 30 is equipped with a sealing part 31, and a sealing part 32 is installed in the middle of the sealing part 31. A scraping part 33 is provided below the sealing part 31 and is fixedly connected to the connecting sleeve 30. The scraping part 33 is used to scrape off the scale attached to the sealing part 32.

[0041] In actual operation, before using the regulating valve, the connecting sleeve 30 is threaded onto the connecting section of the valve body 2, with the connecting sleeve 30 tightly attached to the end of the connecting section of the valve body 2. It should be noted that the sealing part 31, the plugging part 32, and the scraping part 33 are all connected to the connecting sleeve 30 during the manufacturing process. The connecting sleeve 30, the sealing part 31, the plugging part 32, and the scraping part 33 are modularly designed. Therefore, when the connecting sleeve 30 is connected to the connecting section of the valve body 2, it drives the sealing part 31, the plugging part 32, and the scraping part 33 to move into the connecting section of the valve body 2. Then, the valve cover is fixedly installed at the end of the connecting section of the valve body 2 with bolts, and the valve cover further limits the position of the connecting sleeve 30. Then, the existing water inlet pipe and water outlet pipe are fixedly connected to the liquid inlet section and liquid outlet section of the valve body 2 with bolts, respectively.

[0042] See Figure 2 , Figure 4 and Figure 7 The heating flow regulating valve also includes a drain unit 4 disposed in the sealing section of the valve body 2. The drain unit 4 includes a sealing ring 40 disposed in the middle of the sealing section of the valve body 2. The upper and lower ends of the sealing ring 40 are respectively equipped with baffle arc plates 41, and the upper and lower baffle arc plates 41 are symmetrically distributed in the center.

[0043] See Figure 2 , Figure 4 and Figure 7 The sealing ring 40 is equipped with a dirt collection part 42, which includes a dirt collection frame 420 installed inside the sealing ring 40.

[0044] In actual operation, the upper baffle plate 41 is fixedly connected to the inlet section of the valve body 2 and blocks the upper half of the inlet section; the lower baffle plate 41 is fixedly connected to the outlet section of the valve body 2 and blocks the lower half of the outlet section; the two baffle plates 41 cooperate with each other to ensure that the water flow in the valve body 2 can only pass through the sealing ring 40.

[0045] See Figure 2 , Figure 4 and Figure 6 The sealing part 31 includes two connecting rings 310 coaxially distributed inside the connecting sleeve 30. The connecting ring 310 on the outer side is fixedly connected to the inner wall of the connecting sleeve 30, and the connecting ring 310 on the inner side is fixedly connected to the sealing part 32. A sealing membrane 311 is installed between the two connecting rings 310.

[0046] In actual operation, the sealing membrane 311 is an existing fabric-reinforced rolling rubber diaphragm. The two connecting rings 310 and the sealing membrane 311 seal the space between the connecting sleeve 30 and the sealing part 32, effectively preventing water leakage in the regulating valve.

[0047] See Figure 2 , Figure 4 , Figure 6 and Figure 7 A gap is provided between the sealing part 32 and the top of the connecting sleeve 30. The sealing part 32 includes a valve stem 320 fixedly installed in the inner connecting ring 310. The valve stem 320 is detachably connected to the drive module 1. The valve stem 320 slides through the top of the connecting sleeve 30. A pusher plate 321 is installed at the lower end of the valve stem 320. A valve core 322 is sleeved on the outer periphery of the pusher plate 321.

[0048] In actual operation, the valve stem 320 is fixedly connected to the inner connecting ring 310. The valve stem 320 slides through the top of the connecting sleeve 30, and multiple circumferentially evenly distributed ball bearings (which can also be replaced with linear bearings) are provided in the gap. The multiple ball bearings can reduce the frictional resistance between the valve stem 320 and the connecting sleeve 30, and avoid frictional wear after the valve stem 320 has been working continuously. The valve stem 320 also passes through the valve cover and is connected to the connecting transmission pair in the drive module 1 through bolts. The valve stem 320 drives the valve core 322 to be located in the connecting section of the valve body 2 through the pushing plate 321. In the initial state, the valve core 322 passes through the inside of the dirt collection frame 420, thereby blocking the flow of water and the regulating valve is in the closed state.

[0049] When the regulating valve is working, the control system controls the electrical control signal unit to work, which in turn controls the power execution unit. The power execution unit drives the valve stem 320 to rise through the motion conversion mechanism and connecting transmission pair. The valve stem 320 drives the valve core 322 to rise through the push plate 321 and separates it from the sludge collection frame 420, thereby opening the regulating valve. Water flows in from the inlet section of the valve body 2 and through the middle channel of the sludge collection frame 420 to the outlet section, and then out from the outlet section. During operation, the sealing part 31 blocks the water flow in the valve body 2, and the sealing part 32 does not need to be tightly fitted with the connecting sleeve 30. Specifically, the sealing membrane 311 is a flexible structure. During operation, the sealing membrane 311 adapts to the change in position of the valve stem 320 through its own deformation, ensuring that the sealing part 31 always seals the space between the connecting sleeve 30 and the valve stem 320. At the same time, the sealing membrane 311 blocks the water flow, and the gap between the valve stem 320 and the top of the connecting sleeve 30 does not come into contact with the water flow. No abrasive particles such as mud, sand, and rust enter the gap. The frictional resistance of the valve stem 320 is much lower than that of traditional compression packing, which further reduces the wear of the valve stem 320, improves the service life of the valve stem 320, and eliminates the leakage channel at the dynamic seal of the valve stem 320, fundamentally avoiding water leakage failure of the control valve and ensuring the stability of the control valve operation.

[0050] See Figure 2 , Figure 4 , Figure 6 and Figure 7The scraping part 33 includes a pressure-resistant ring plate 330 installed inside the connecting sleeve 30 and slidably cooperating with the valve stem 320. Multiple mounting rods 331 are installed at the lower end of the pressure-resistant ring plate 330. A scraping ring 332 is installed at the lower end of the multiple mounting rods 331. A rubber scraping ring with a right-angled triangular cross-section is provided on the inner side of the scraping ring 332.

[0051] In actual operation, the pressure-resistant ring plate 330 and the valve stem 320 slide through each other. The pressure-resistant ring plate 330 can effectively withstand the water pressure inside the valve body 2, preventing the water flow under high pressure from damaging the sealing membrane 311. The sealing membrane 311 itself has a certain compressive strength, which meets the requirements of the regulating valve. According to the temperature change of the supplied hot water flow, the electrical control signal unit controls the power execution unit in real time. The power execution unit drives the valve stem 320 to rise and fall in real time through the motion conversion mechanism and the connecting transmission pair, thereby driving the valve core 322 to rise and fall. At the same time, the scraping part 33 continuously scrapes the surface of the sealing part 32. Specifically, when the valve core 322 moves to the scraper ring 332, the scraper ring 332 scrapes the annular surface of the valve core 322 with a rubber scraper. Even if the valve core 322 moves up and down within a small range, the scraper ring 332 can effectively block the water flow. The water flow changes direction after passing through this point, assisting in rinsing the annular surface of the valve core 322 and cleaning it. This effectively prevents scale from accumulating and caking on the surface of the valve core 322 over a long period of time, avoids corrosion of the valve core 322, and ensures that the valve core 322 can still fit tightly with the dirt collection frame 420 after long-term use, thus ensuring a good sealing effect.

[0052] See Figure 2 , Figure 4 , Figure 6 and Figure 7 The valve core 322 has multiple circumferentially evenly distributed limiting plates 323 installed on its upper end, and each limiting plate 323 is located between two adjacent mounting rods 331; the sealing part 32 also includes a compression cavity 324 opened in the middle of the valve core 322, the compression cavity 324 is in the shape of a stepped cylinder, a compression ring 325 is installed on the outer periphery of the compression cavity 324, and multiple evenly distributed connecting rods 326 are installed in the compression cavity 324, and the multiple connecting rods 326 slide through the pushing plate 321 at the same time.

[0053] In specific operation, after the heating work is completed, the electrical control signal unit controls the power execution unit to work. The power execution unit drives the valve stem 320 to descend through the motion conversion mechanism and connecting transmission pair. The valve stem 320 drives the valve core 322 to re-insert into the dirt collection part 42 through the pushing plate 321. At the same time, the valve core 322 drives multiple limit plates 323 to move downward. The limit plates 323 have an inverted L-shaped structure. The horizontal section of the limit plate 323 descends to the upper end of the scraper ring 332. The scraper ring 332 limits the limit plate 323, and then limits the valve core 322. Afterward, the descent of the valve stem 320 drives the pushing plate 321 to continue to descend. The pushing plate 321 moves in the extrusion chamber 324. The lower outer periphery of the pushing plate 321 is provided with an annular inclined surface. The inclined surface pushes the extrusion ring 325. The extrusion ring 325 is made of rubber. The extrusion ring 325 undergoes radial expansion deformation under force and is tightly attached to the inner wall of the dirt collection frame 420 (e.g., Figure 8 and Figure 9 As shown in the figure, this further enhances the sealing between the valve core 322 and the dirt collection frame 420, preventing water leakage.

[0054] See Figure 2 , Figure 4 , Figure 5 and Figure 7 The sludge collection frame 420 is equipped with a plurality of circumferentially evenly distributed connecting pipes 421. A movable component is connected to the connecting pipe 421, and a sealing arc plate 422 is installed on the movable component. The plurality of sealing arc plates 422 are closely attached and spliced ​​to form a sealing ring for sealing the upper port of the sludge collection frame 420. The splicing ends of two adjacent sealing arc plates 422 are covered with sealing rubber.

[0055] See Figure 2 , Figure 4 , Figure 6 and Figure 7 The movable component includes a movable rod 423 slidably connected within the connecting pipe 421. One end of the movable rod 423 located on the axis of the sludge collection frame 420 is provided with a hemispherical protrusion. A connecting spring 424 is installed between the movable rod 423 and the connecting pipe 421. A sliding through hole 425 is opened on the upper side of the connecting pipe 421. A fixed rod 426 is slidably connected within the sliding through hole 425. The two ends of the fixed rod 426 are fixedly connected to the movable rod 423 and the sealing arc plate 422, respectively.

[0056] See Figure 2 and Figures 4-7 The sludge collection frame 420 is composed of two coaxially distributed sludge collection rings and a support ring that is close to the lower end of the two sludge collection rings. The two sludge collection rings are fixedly connected by multiple connecting pipes 421. A rubber ring is provided at the contact point between the support ring and the sludge collection ring. An annular inclined surface is provided at the upper end of the inner sludge collection ring.

[0057] In actual operation, the lower outer periphery of the valve core 322 is provided with an arc-shaped surface. When the valve core 322 is re-inserted into the dirt collection frame 420, the dirt collection part 42 performs secondary scraping of the residual scale on the surface of the scraping part 33 and collects it. Specifically, when the valve core 322 moves downward, the arc-shaped surface on the valve core 322 simultaneously squeezes the hemispherical protrusions on multiple moving rods 423. The multiple moving rods 423 slide within the corresponding connecting pipes 421 under force and pass through the corresponding fixing rods 426. The multiple sealing arc plates 422 are separated, thereby opening the opening at the top of the sludge collection frame 420. Then, the inner ring surface of the inner sludge collection ring fits against the outer ring surface of the valve core 322. The annular inclined surface at the top of the inner sludge collection ring scrapes the outer ring surface of the valve core 322, removing the scale that was not scraped off by the scraping ring 332 on the annular surface of the valve core 322. The scale falls off the valve core 322 and falls into the sludge collection frame 420 for collection, preventing scale residue on the valve core 322 from reducing the sealing effect.

[0058] See Figure 2 and Figures 4-7 The lower end of the collection part 42 is connected to the discharge part 43, which is connected to the sealing section of the valve body 2. The discharge part 43 includes a discharge port 430 opened at the lower end of the sealing section of the valve body 2. A sealing cover 431 is detachably installed inside the discharge port 430. Multiple circumferentially evenly distributed support rods 432 are installed on the upper end of the sealing cover 431. The support rods 432 are fixedly connected to the support ring.

[0059] In actual operation, the drain outlet 430 is threaded. In the initial state, the sealing cover 431 is threadedly connected to the drain outlet 430. The sealing cover 431, through multiple support rods 432, drives the support ring to fit tightly against the lower ends of the two dirt collecting rings, thereby sealing the bottom of the dirt collecting frame 420 and preventing leakage when the valve core 322 and the dirt collecting frame 420 are engaged. When the regulating valve stops working, the valves on the existing inlet and outlet pipes can be closed. Then, the sealing cover 431 is rotated, and the sealing cover 431, through multiple support rods 432, drives the support ring to separate from the two dirt collecting rings (e.g., Figure 10 and Figure 11 As shown in the diagram, the upper end of the sludge collection frame 420 is open at this time. The scale inside the sludge collection frame 420 is discharged from the drain port 430 by its own gravity and the flow of residual water in the valve, realizing the function of cleaning the regulating valve. This effectively prevents the scraped scale from flowing back to other parts of the heating pipeline with the water flow, improving the overall working stability and heat exchange efficiency of the heating pipeline. Operators can also inject water from the drain port 430 to deeply clean the bottom of the valve core 322 and the valve body 2. After cleaning, the sealing cover 431 can be reconnected to the drain port 430 after the water flow is discharged, which can effectively prevent the internal corrosion of the regulating valve and facilitate the next heating operation.

[0060] In the description of the embodiments of the present invention, it should be noted that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the embodiments of the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise stated, "a plurality of" means two or more.

[0061] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0062] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A heating flow regulating valve, comprising a drive module for controlling the operation of the regulating valve, characterized in that, Also includes: The valve housing is connected to the lower end of the drive module. The valve housing consists of a shell and a valve cover. The valve housing is divided into an inlet section, an outlet section, a sealing section, and a connecting section. A valve unit is connected within a valve housing connection section. The valve unit includes a connecting sleeve that is detachably connected within the valve housing connection section. A sealing part is installed inside the connecting sleeve. A plugging part is installed in the middle of the sealing part. A gap is provided between the plugging part and the top of the connecting sleeve. A scraping part is provided below the sealing part and is fixedly connected to the connecting sleeve. The scraping part is used to scrape off the scale adhering to the plugging part. The sealing part includes two connecting rings coaxially distributed inside the connecting sleeve. The outer connecting ring is fixedly connected to the inner wall of the connecting sleeve, and the inner connecting ring is fixedly connected to the sealing part. A sealing membrane is installed between the two connecting rings. A sewage discharge unit is installed inside the valve body sealing section. The sewage discharge unit includes a sealing ring installed in the middle of the valve body sealing section. The upper and lower ends of the sealing ring are respectively equipped with baffle arc plates. The two baffle arc plates are symmetrically distributed in the center. A sewage collection part is installed inside the sealing ring. The lower end of the sewage collection part is connected to the sewage discharge part, which is connected to the valve body sealing section. At the start of operation, the sealing part blocks the water flow inside the valve body, and the plugging part does not need to be tightly fitted with the connecting sleeve. At the same time, the scraping part continuously scrapes the surface of the plugging part. After the operation is completed, the dirt collection part scrapes off the scale on the surface of the scraping part a second time and collects it.

2. The heating flow regulating valve according to claim 1, characterized in that: The sealing part includes a valve stem fixedly installed in the inner connecting ring. The valve stem is detachably connected to the drive module. The valve stem slides through the top of the connecting sleeve. A pushing plate is installed at the lower end of the valve stem. A valve core is sleeved on the outer periphery of the pushing plate. Multiple circumferentially distributed limiting plates are installed at the upper end of the valve core.

3. A heating flow regulating valve according to claim 2, characterized in that: The sealing part also includes a squeezing chamber in the middle of the valve core. The squeezing chamber is in the shape of a stepped cylinder. A squeezing ring is installed on the outer periphery of the squeezing chamber. Multiple evenly distributed connecting rods are installed inside the squeezing chamber. The multiple connecting rods slide through the pushing disc at the same time.

4. A heating flow regulating valve according to claim 2, characterized in that: The scraping part includes a pressure-resistant ring plate installed inside the connecting sleeve and slidingly cooperating with the valve stem. Multiple mounting rods are installed at the lower end of the pressure-resistant ring plate, and a scraping ring is installed at the lower end of the multiple mounting rods. Each limiting plate is located between two adjacent mounting rods.

5. A heating flow regulating valve according to claim 1, characterized in that: The sludge collection section includes a sludge collection frame installed inside a sealing ring. Multiple circumferentially evenly distributed connecting pipes are installed inside the sludge collection frame. Movable parts are connected to the connecting pipes, and sealing arc plates are installed on the movable parts.

6. A heating flow regulating valve according to claim 5, characterized in that: The movable component includes a movable rod slidably connected inside the connecting pipe. A hemispherical protrusion is provided at one end of the movable rod located on the axis of the sludge collection frame. A connecting spring is installed between the movable rod and the connecting pipe. A sliding through hole is opened on the upper side of the connecting pipe wall. A fixed rod is slidably connected inside the sliding through hole. The two ends of the fixed rod are fixedly connected to the movable rod and the sealing arc plate, respectively.

7. A heating flow regulating valve according to claim 5, characterized in that: The sludge collection frame is composed of two coaxially distributed sludge collection rings and a support ring that is close to the lower end of the two sludge collection rings. The two sludge collection rings are fixedly connected by multiple connecting pipes. A rubber ring is provided at the contact point between the support ring and the sludge collection ring. An annular inclined surface is provided at the upper end of the inner sludge collection ring.

8. A heating flow regulating valve according to claim 7, characterized in that: The sewage discharge section includes a sewage discharge port located at the lower end of the valve body sealing section. A sealing cover is detachably installed inside the sewage discharge port. Multiple circumferentially evenly distributed support rods are installed on the upper end of the sealing cover. The support rods are fixedly connected to the support ring.

9. A heating flow regulating valve according to claim 5, characterized in that: Multiple sealing arc plates are closely attached and spliced ​​to form a sealing ring for sealing the upper port of the sludge collection frame, and sealing rubber is laid at the splicing ends of two adjacent sealing arc plates.

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