Automatic turn-off device for exhaust valve of heating system

Abstract

An automatic turn-off device for an exhaust valve of a heating system comprises a connecting pipe arranged on a heating pipeline, the top of the connecting pipe is connected with the exhaust valve, the exhaust valve is provided with a supporting plate, the bottom of the supporting plate is movably provided with a collecting barrel, a filter screen used for filtering impurities in water is arranged in the collecting barrel in a sliding mode, and the filter screen is located under an exhaust pipe of the exhaust valve. A vibration assembly for driving the filter screen to vibrate is arranged on the collecting barrel; a blocking assembly used for blocking water flow is arranged in the connecting pipe and connected with the collecting barrel, and when heating water is gradually drained into the collecting barrel through an air outlet pipe of the exhaust valve, the collecting barrel gradually moves downwards under the gravity of the water, and the water flow in the connecting pipe is blocked through the blocking assembly. A large amount of impurities are prevented from being mixed into the collected water, the difficulty of follow-up water purification is reduced, the collected water resources are conveniently recycled, and waste of the water resources is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of heating systems, and in particular to an automatic shut-off device for an exhaust valve of a heating system. Background Art

[0002] During the operation of the heating system, when gas is generated in the pipe, since the density of gas is less than that of water, it will naturally flow upward along the slope of the pipe and eventually gather at the highest point of the system. Therefore, the exhaust valve is usually installed at the highest position of the system to discharge the gas. Although the exhaust valves produced by different manufacturers have different designs, the core structure generally adopts the float principle. Figure 1 As shown in the figure, the working process is as follows: gas enters the exhaust valve cavity and accumulates at the top of the valve cavity. As the gas in the valve cavity increases, the water in the valve cavity is forced out of the valve cavity. As the water level drops, the float pulls one end of the connecting rod downward. At this time, the connecting rod is tilted, and a gap appears between the sealing part of the connecting rod and the contact part of the exhaust hole. The gas passes through the gap and is discharged from the exhaust port. As the gas is discharged, the water level in the valve cavity rises, and the float rises under the buoyancy of the water. The sealing end face of the connecting rod gradually presses against the exhaust hole until the entire exhaust hole is completely blocked and the exhaust valve is completely closed. To ensure the stability of the exhaust valve, the float is often made of low-density polypropylene (PP). This material has excellent high-temperature resistance and is not easily deformed even after long-term immersion in hot water, which reliably guarantees the buoyancy characteristics of the float. Although the connecting rod is made of copper and is movably connected to the float to adapt to movement requirements, the sealing part of the connecting rod is connected to the main body through a steel spring. The pre-tightening force of the spring can ensure the tight fit of the sealing surface in the non-exhaust state to ensure sealing.

[0003] However, as the equipment operates for extended periods, the exhaust valve may develop a potential malfunction. If impurities accumulate between the float and the valve chamber, this can hinder the float's normal movement, preventing the spring from returning to its original position. Once the spring fails, the exhaust valve remains permanently open, allowing water to continuously overflow from the exhaust port. This not only wastes water resources and causes system pressure loss, but in severe cases, can also soak the elevator and seep into users' homes, causing property damage or even accidents.

[0004] For example, the patent document with the publication number "CN210661627U" and the name "Automatic shut-off device for exhaust valve of heating system" includes a ball valve, a lever and a liquid collector. The ball valve is located between the heating pipe and the exhaust valve. A fixed rod is provided horizontally to the left on the right side of the ball valve. The lever is hinged at the end of the fixed rod. The left end of the lever is connected to the switch handle of the ball valve through a pull rope. The liquid collector is hung on the right end of the lever through a connecting line. A liquid inlet and an air outlet are provided on the liquid collector. The liquid inlet of the liquid collector is connected to the air outlet of the exhaust valve through a connecting pipe; a travel switch and an alarm are provided on the ball valve. The travel switch is connected to the alarm through a line. When the switch handle of the ball valve is in the closed state, it touches the travel switch, and the travel switch activates the alarm.

[0005] However, the technology involved in the above-mentioned documents has obvious limitations in actual application: since the water temperature is relatively high when the heating system is running, it is very easy to cause scale formation. Therefore, when the spring in the exhaust valve fails, these scales will enter the liquid collector along with impurities such as rust in the heating pipe along with the drainage. Not only will a large amount of impurities be mixed into the collected water, increasing the difficulty of subsequent water purification, but it will also be difficult to effectively recycle and reuse water resources, ultimately resulting in unnecessary waste. Summary of the Invention

[0006] The purpose of the present invention is to address the shortcomings of the existing technology and propose an automatic shut-off device for the exhaust valve of a heating system, which is used to solve the technical problem mentioned in the background technology that scale will enter the liquid collector together with impurities such as rust in the pipe along with the drainage, resulting in a large amount of impurities mixed in the collected water, increasing the difficulty of subsequent water purification.

[0007] To achieve the above object, the present invention adopts the following technical solutions: An automatic shut-off device for the exhaust valve of a heating system includes a connecting pipe arranged on the heating pipe, an exhaust valve being connected to the top of the connecting pipe, a support plate being provided on the exhaust valve, a collecting cylinder being movably provided at the bottom of the support plate, a filter screen for filtering impurities in water being slidably provided in the collecting cylinder, the filter screen being located directly below the exhaust pipe of the exhaust valve, and a vibration component for driving the filter screen to vibrate being provided on the collecting cylinder; a sealing component for blocking the water flow is provided in the connecting pipe, and the sealing component is connected to the collecting cylinder, and when the heating water gradually drains into the collecting cylinder through the outlet pipe of the exhaust valve, the collecting cylinder gradually moves downward under the gravity of the water, and blocks the water flow in the connecting pipe through the sealing component.

[0008] Working principle: When the exhaust valve malfunctions and the exhaust pipe on its top is in a normally open state and overflows, the water in the heating pipe flows into the filter through the exhaust pipe of the exhaust valve, and at the same time, the vibration component drives the filter to vibrate. The filter filters impurities such as scale and rust in the heating water and allows the water to flow into the collection tube. The collection tube gradually moves downward under the action of water gravity, and blocks the water flow in the connecting pipe through the blocking component.

[0009] The beneficial effects of the present invention are as follows: since a collection cylinder is movably provided at the bottom of the support plate, a filter screen for filtering impurities in the water is slidably provided in the collection cylinder, the filter screen is located directly below the exhaust pipe of the exhaust valve, and a vibration component is provided on the collection cylinder for driving the filter screen to vibrate, when the exhaust valve fails and the exhaust pipe at its top is in a normally open state and overflows, the water in the heating pipe flows into the filter screen through the exhaust pipe of the exhaust valve, and the vibration component drives the filter screen to vibrate, thereby improving the filtration efficiency of the filter screen. This prevents a large amount of impurities from being mixed into the collected water, reduces the difficulty of subsequent water purification, facilitates the recycling of the collected water resources, and avoids water waste.

[0010] Furthermore, the vibration component includes a rotating shaft rotatably installed on the collection barrel, a cam fixedly installed on the rotating shaft, and a driving component for driving the rotating shaft to rotate. During the rotation of the cam, the cam slides and pushes with the filter screen.

[0011] Furthermore, the driving assembly includes a vertical plate fixedly arranged at the bottom of the support plate, a rack fixedly arranged along the extension direction of the vertical plate, and a gear fixedly arranged on the rotating shaft, and the gear is engaged with the rack.

[0012] Furthermore, the sealing assembly includes a first sealing ring and a fixed ring fixedly arranged in the connecting pipe and arranged at intervals, and a sealing ball movably arranged inside the connecting pipe, the fixed ring is fixedly provided with a conical spring, the radially narrower end of the conical spring is fixedly connected to the sealing ball, the sealing ball is fixedly connected to a first pull rope, and the other end of the first pull rope is fixedly connected to the collecting tube; in the process of the collecting tube gradually moving downward, the first pull rope drives the sealing ball to seal with the inner hole of the first sealing ring to block the water flow.

[0013] Furthermore, the support plate, the exhaust valve, and the connecting pipe are all rotatably provided with first guide wheels for guiding the first pull rope, and the first pull rope is sequentially wound around the first guide wheels in the support plate, the exhaust valve, and the connecting pipe.

[0014] Furthermore, a distance-adjusting assembly for adjusting the moving distance of the second pull rope is provided on the outside of the exhaust valve. The distance-adjusting assembly is connected to the collecting tube. A second sealing ring is slidingly provided in the connecting pipe. The inner hole of the second sealing ring is sealed with the sealing ball. The second sealing ring is fixedly connected to the second pull rope, and the other end of the second pull rope is connected to the distance-adjusting assembly.

[0015] Furthermore, the distance adjustment assembly includes a connecting shaft rotatably arranged on the outside of the exhaust valve, a first winding drum and a second winding drum fixedly arranged on the connecting shaft, the diameter of the first winding drum is larger than the diameter of the second winding drum, the first winding drum is fixedly connected to the second pull rope, and a third pull rope is wrapped around the outer circumference of the second winding drum, and the third pull rope is fixedly connected to the collecting drum.

[0016] Furthermore, the support plate, the exhaust valve, and the connecting pipe are all rotatably provided with second guide wheels for guiding the second pull rope, and the second pull rope is sequentially wound around the second guide wheels in the support plate, the exhaust valve, and the connecting pipe.

[0017] Furthermore, a sealing sleeve that seals with the sealing ball is fixedly provided at the inner holes of the first sealing ring and the second sealing ring.

[0018] Furthermore, the filter screen is hemispherical. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of an existing exhaust valve; Figure 2 It is a three-dimensional schematic diagram of the present invention; Figure 3 It is a cross-sectional schematic diagram of the collecting tube of the present invention; Figure 4 The cross-sectional schematic diagram of the present invention is omitted for the heating pipe; Figure 5 The present invention is a three-dimensional schematic diagram in which the heating pipe, connecting pipe and exhaust valve are hidden; Figure 6 Schematic diagram of the exhaust valve and the distance adjustment assembly of the present invention; Figure 7 It is a three-dimensional schematic diagram of the distance adjustment component of the present invention.

[0020] Explanation of the accompanying drawings: 1. Connecting pipe; 11. First sealing ring; 12. Fixed ring; 121. Conical spring; 122. Sealing ball; 13. Second sealing ring; 131. Sealing sleeve; 132. Return spring; 14. First pull rope; 141. First guide wheel; 15. Second pull rope; 151. Second guide wheel; 2. Exhaust valve; 3. Support plate; 31. Support column; 32. Vertical plate; 33. Rack; 4. Collecting cylinder; 41. Drain pipe; 42. Valve; 43. Rotating shaft; 44. Cam; 45. Gear; 46. Guide block; 5. Filter screen; 51. Slider; 52. Vibration spring; 53. Slide groove; 6. Connecting shaft; 61. Mounting plate; 62. First winding drum; 63. Second winding drum; 631. Third pull rope. DETAILED DESCRIPTION

[0021] The technical solutions of the present invention are further described below with reference to the accompanying drawings and embodiments.

[0022] like Figure 1-Figure 2 As shown, the automatic shut-off device for the exhaust valve of a heating system includes a connecting pipe 1 installed on the top of the heating pipe, and the top of the connecting pipe 1 is connected to the exhaust valve 2. The bottom and top of the connecting pipe 1 are connected to the heating pipe and the exhaust valve 2 respectively by flange connections, thereby facilitating the installation and maintenance of the connecting pipe 1 and the exhaust valve 2. A support column 31 is evenly fixedly installed on the top of the exhaust valve 2, and a support plate 3 is fixedly installed on the top of the support column 31. A collection cylinder 4 is movably installed on the bottom of the support plate 3. The top of the collection cylinder 4 is open, and a filter screen 5 for filtering impurities such as scale and rust in the heating water is slidably installed in the collection cylinder 4. The filter screen 5 is located directly below the exhaust pipe 21 of the exhaust valve 2. When the exhaust valve 2 fails, causing the exhaust pipe 21 at its top to be in a normally open state and overflowing, the water in the heating pipe flows into the filter 5 through the exhaust pipe 21 of the exhaust valve 2. The filter 5 filters impurities such as scale and rust in the heating water and allows the water to flow into the collection barrel 4, thereby facilitating the recycling of the collected water resources and avoiding waste of water resources. Specifically, the filter 5 is a hemispherical structure, which effectively increases the filtration area of ​​the filter 5, thereby improving the filtration efficiency of the water flow. A drain pipe 41 connected to the interior of the collection barrel 4 is fixedly installed at the bottom of the collection barrel 4. A valve 42 is installed on the drain pipe 41. When the water resources in the collection barrel 4 need to be recycled, the valve 42 is opened to drain the water in the collection barrel 4.

[0023] like Figure 1 and Figure 2As shown, the inner wall of the collection barrel 4 is provided with a plurality of vertically arranged chutes 53 along its circumference. A plurality of sliders 51 are fixedly mounted on the top of the filter screen 5 along its circumference. The plurality of sliders 51 correspond to the plurality of chutes 53 one-to-one and are slidably mounted. A vibration spring 52 is fixedly mounted between the sliders 51 and the corresponding chutes 53. A vibration assembly is mounted on the collection barrel 4 for driving the filter screen 5 to vibrate. The vibration assembly includes a rotating shaft 43 that rotates and passes through the collection barrel 4, a cam 44 that is fixedly mounted on one end of the rotating shaft 43 within the collection barrel 4, and a drive assembly for driving the rotating shaft 43 to rotate. During the rotation of the cam 44, it intermittently slides and pushes against one of the sliders 51 at the top of the filter screen 5. The drive assembly includes a vertical plate 32 fixedly mounted on the bottom of the support plate 3, a rack 33 fixedly mounted along the extension direction of the vertical plate 32, and a gear 45 fixedly mounted on the rotating shaft 43. The gear 45 meshes with the rack 33. As the heating water gradually drains into the collection drum 4 through the outlet pipe of the exhaust valve 2, the collection drum 4 gradually moves downward under the action of the water's gravity, driving the gear 45 downward. As the gear 45 moves downward along the rack 33, it rotates. The gear 45 rotates via the shaft 43, driving the cam 44 to rotate. The rotation of the cam 44 drives the filter 5 upward and compresses the vibration spring 52. When the cam 44 disengages from the filter 5, the vibration spring 52 returns the filter 5 downward. This reciprocating motion causes the filter 5 to continuously vibrate, effectively preventing impurities from clogging the mesh and further improving filtration efficiency. A guide block 46 is rotatably mounted on the end of the shaft 43 away from the cam 44. A guide slot (not shown) is vertically defined on the side of the vertical plate 32 near the collection drum 4. The guide block 46 is slidably connected to the guide slot, thereby increasing the stability of the collection drum 4 as it moves downward.

[0024] like Figure 4 and Figure 5As shown, a sealing assembly for blocking water flow is installed in the connecting pipe 1, and the sealing assembly is connected to the collecting tube 4. The sealing assembly includes a first sealing ring 11 and a fixed ring 12 fixedly installed in the connecting pipe 1 and arranged at intervals, and a sealing ball 122 movably installed inside the connecting pipe 1. The sealing ball 122 is made of one of EPDM rubber, fluororubber and silicone rubber. Ethylene propylene rubber, fluororubber and silicone rubber are all elastic and water-resistant materials, which effectively prevent the sealing ball 122 from being deformed due to being immersed in water for a long time, resulting in poor sealing. The fixed ring 12 is located above the first sealing ring 11, and the sealing ball 122 is located below the first sealing ring 11. A conical spring 121 is fixedly mounted on one side of the retaining ring 12, near the first sealing ring 11. The radially narrower end of the conical spring 121 extends downward through the inner bore of the first sealing ring 11 and is fixedly connected to a sealing ball 122. The inner bore diameter of the first sealing ring 11 is smaller than that of the sealing ball 122, and the sealing ball 122 forms a sealing fit with the inner bore of the first sealing ring 11. A first pull cord 14 is fixedly connected to the center of the top end of the sealing ball 122. The other end of the first pull cord 14 extends to the exterior of the exhaust valve 2 and is fixedly connected to the collection barrel 4. As the collecting tube 4 gradually moves downward, it drives the sealing ball 122 through the first pull rope 14 to press against the inner hole edge of the first sealing ring 11 and seal it, thereby blocking the water flow and realizing the automatic shut-off function of the exhaust valve 2. It can prevent the heating water from overflowing through the exhaust pipe 21 of the exhaust valve 2 and reduce the waste of water resources, and prevent the heating water from continuously seeping into the user's room, causing property loss or even safety accidents, thereby ensuring the safety of the heating system operation.

[0025] like Figure 4 and Figure 5As shown, the support plate 3, the exhaust valve 2, and the connecting pipe 1 are all rotatably installed with a first guide wheel 141 for guiding the first pull rope 14, and the first pull rope 14 is sequentially wound around the support plate 3, the exhaust valve 2, and the first guide wheel 141 in the connecting pipe 1. The first pull rope 14 is wound around the first guide wheel 141 at the bottom of the support plate 3, and after being guided, it is passed downward to the interior of the exhaust valve 2 and sealed and slidably fitted with the passing point. After entering the exhaust valve 2, the first pull rope 14 continues to be wound around the first guide wheel 141 in the exhaust valve 2, and after being guided again, it is wound around the first guide wheel 141 on the connecting pipe 1, so that the first pull rope 14 is finally extended vertically downward and kept coincident with the axis of the connecting pipe 1, so that when the first pull rope 14 drives the sealing ball 122 to move upward and abut against the inner hole edge of the first sealing ring 11, it can ensure that the sealing ball 122 and the inner hole edge of the first sealing ring 11 are evenly stressed, thereby ensuring the sealing effect between the two; and the first pull rope 14 is guided by the first guide wheel 141, which can not only reduce the friction of the first pull rope 14 when moving, but also avoid the first pull rope 14 interfering with the up and down movement of the float in the exhaust valve 2. Moreover, the first pull rope 14 is made of one of polypropylene fiber and nylon. Both polypropylene fiber and nylon are water-resistant and anti-breakage materials, which effectively prevent the first pull rope 14 from breaking when immersed in water for a long time, thereby increasing the reliability of the first pull rope 14.

[0026] like Figure 4 and Figure 6 As shown, a second sealing ring 13 is slidably installed in the connecting pipe 1. The second sealing ring 13 is located below the sealing ball 122, and a reset spring 132 is fixedly installed between the second sealing ring 13 and the first sealing ring 11. The inner hole diameter of the second sealing ring 13 is smaller than the diameter of the sealing ball 122, and the inner hole of the second sealing ring 13 is sealed with the sealing ball 122. The second sealing ring 13 is symmetrically fixedly connected to the second pull rope 15, and the other end of the second pull rope 15 extends to the outside of the exhaust valve 2. A distance adjustment component for adjusting the moving distance of the second pull rope 15 is symmetrically installed on one side of the exhaust valve 2 close to the collecting tube 4. The distance adjustment component is connected to the collecting tube 4, and the distance adjustment component is connected to the corresponding second pull rope 15.

[0027] like Figure 6 and Figure 7As shown, the pitch adjustment assembly includes a connecting shaft 6 rotatably mounted on the outside of the exhaust valve 2, and a first winding drum 62 and a second winding drum 63 fixedly mounted on the connecting shaft 6. Two mounting plates 61 are fixedly mounted at intervals on one side of the exhaust valve 2, and the ends of the connecting shaft 6 are rotatably inserted into the corresponding mounting plates 61. The first winding drum 62 includes a winding roller and stop plates fixedly mounted at each end. The first winding drum 62 and the second winding drum 63 have the same structure. The winding drums of the first winding drum 62 and the second winding drum 63 are respectively fixedly mounted on the outer circumference of the connecting shaft 6. The diameter of the winding roller body of the first winding reel 62 is larger than the diameter of the winding roller body of the second winding reel 63. The winding roller body of the first winding reel 62 is fixedly connected to the second pull rope 15. The third pull rope 631 is wound around the outer periphery of the winding roller body of the second winding reel 63, and the overall diameter of the third pull rope 631 wrapped around the second winding reel 63 is also smaller than the roller body diameter of the first winding reel 62. One end of the third pull rope 631 is fixedly connected to the collecting drum 4. When the collecting drum 4 gradually moves downward, the collecting drum 4 pulls the third pull rope 631 to move, and the third pull rope 631 drives the second winding drum 63 to rotate. The second winding drum 63 drives the first winding drum 62 to rotate through the connecting shaft 6, and the first winding drum 62 winds the second pull rope 15, so that the second pull rope 15 drives the second blocking ring 13 to move upward after being guided by the second guide wheel 151. Since the diameter of the winding roller body of the first winding drum 62 is larger than the diameter of the winding roller body of the second winding drum 63, the winding of the third pull rope 631 on the second winding drum The overall diameter of the wire drum 63 is also smaller than the roller diameter of the first wire drum 62. Therefore, when the first wire drum 62 and the second wire drum 63 rotate the same number of times, the length of the second pull rope 15 wound by the first wire drum 62 is greater than the length of the third pull rope 631 unwound by the second wire drum 63. As a result, the distance the collection drum 4 moves downward is less than the distance the second pull rope 15 drives the second sealing ring 13 upward. In other words, the distance the second pull rope 15 drives the second sealing ring 13 upward is greater than the distance the first pull rope 14 drives the sealing ball 122 upward. Moreover, after a limited number of tests, it can be ensured that when the collection drum 4 drives the sealing ball 122 to abut against the first sealing ring 11 through the first pull rope 14, the second sealing ring 13 moves upward and also abuts against the bottom of the sealing ball 122, thereby further sealing the heating water and improving the sealing effect of the heating water.

[0028] like Figure 4 and Figure 5As shown, second guide wheels 151 for guiding the second pull rope 15 are rotatably mounted on the support plate 3, the exhaust valve 2, and the connecting pipe 1. The second pull rope 15 is sequentially wound around the second guide wheels 151 in the support plate 3, the exhaust valve 2, and the connecting pipe 1. The second pull rope 15 is wound around the second guide wheel 151 at the bottom of the support plate 3. After being guided, it passes downward into the interior of the exhaust valve 2 and slides in a sealed manner with the passage. After entering the exhaust valve 2, the second pull rope 15 continues to wind around the second guide wheel 151 in the exhaust valve 2. After being guided again, it is wound around the second guide wheel 151 in the connecting pipe 1, ultimately extending downward along the inner wall of the connecting pipe 1. The second pull rope 15 extends downward and sequentially passes through the fixing ring 12 and the first sealing ring 11, sliding in a sealed manner with the passage. The second pull rope 15 is guided by the second guide wheel 151, which not only reduces the friction of the second pull rope 15 during movement, but also prevents the second pull rope 15 from interfering with the upward and downward movement of the float in the exhaust valve 2. The second pull rope 15 is made of the same material as the first pull rope 14 .

[0029] like Figure 4 and Figure 5 As shown, in another embodiment, the inner holes of the first sealing ring 11 and the second sealing ring 13 are fixedly installed with a sealing sleeve 131 that is compatible with the sealing ball 122. The sealing sleeve 131 is sealed with the sealing ball 122. When the sealing ball 122 is tightly pressed against the sealing sleeve 131, the sealing effect of the sealing ball 122 on the heating water can be further increased.

[0030] Working principle: In the initial state, the collecting tube 4 is closest to the exhaust pipe 21 of the exhaust valve 2, and the conical spring 121 and the return spring 132 both maintain a naturally extended state. At this time, there is no contact between the first sealing ring 11, the sealing ball 122 and the second sealing ring 13, ensuring that a passage is formed inside the connecting pipe 1, so that the exhaust valve 2 can operate normally.

[0031] When the exhaust valve 2 malfunctions and the exhaust pipe 21 at its top is in a normally open state and overflows, the water in the heating pipe flows into the filter 5 through the exhaust pipe 21 of the exhaust valve 2. The filter 5 filters impurities such as scale and rust in the heating water and allows the water to flow into the collecting cylinder 4. The collecting cylinder 4 gradually moves downward under the action of the gravity of the water, and the collecting cylinder 4 drives the gear 45 to move downward. The gear 45 rotates as it moves downward along the rack 33. The gear 45 drives the cam 44 to rotate through the rotating shaft 43. During the rotation of the cam 44, the filter 5 is driven to move upward and compress the vibration spring 52. When the cam 44 is out of contact with the filter 5, the filter 5 is driven downward by the restoring force of the vibration spring 52. Through such reciprocating motion, the filter 5 can continuously generate vibration, thereby improving the filtering efficiency.

[0032] As the collecting tube 4 gradually moves downward, it also drives the first pull rope 14 to move. After being guided by the first guide wheel 141, the first pull rope 14 drives the blocking ball 122 to move upward, and at the same time compresses the conical spring 121. The blocking ball 122 moves upward and presses against the edge of the inner hole of the first sealing ring 11 and seals it, thereby blocking the heating water and realizing the automatic shut-off function of the exhaust valve 2.

[0033] As the collecting drum 4 gradually moves downward, it also pulls the third pull rope 631 to move, and the third pull rope 631 drives the second winding drum 63 to rotate. The second winding drum 63 drives the first winding drum 62 to rotate through the connecting shaft 6, and the first winding drum 62 winds the second pull rope 15. The second pull rope 15 is guided by the second guide wheel 151 and drives the second blocking ring 13 to move upward. Since the diameter of the winding roller of the first winding drum 62 is larger than the diameter of the winding roller of the second winding drum 63, and the winding of the third pull rope 631 on the second winding drum The overall diameter of the wire drum 63 is also smaller than the roller diameter of the first wire drum 62. Therefore, when the first wire drum 62 and the second wire drum 63 rotate the same number of times, the length of the second pull rope 15 wound by the first wire drum 62 is greater than the length of the third pull rope 631 unwound by the second wire drum 63. As a result, the distance the collection drum 4 moves downward is less than the distance the second pull rope 15 drives the second sealing ring 13 upward. In other words, the distance the second pull rope 15 drives the second sealing ring 13 upward is greater than the distance the first pull rope 14 drives the sealing ball 122 upward. This ensures that when the collection drum 4 drives the sealing ball 122 to abut against the first sealing ring 11 through the first pull rope 14, the second sealing ring 13 also moves upward and abuts against the bottom of the sealing ball 122, thereby further sealing the heating water and improving the sealing effect of the heating water.

[0034] When the water in the collecting tube 4 needs to be drained, the valve 42 is opened to allow the water in the collecting tube 4 to be drained through the drain pipe 41, and the sealing ball 122, the second sealing ring 13 and the collecting tube 4 are restored to their initial positions under the reset force of the conical spring 121 and the reset spring 132.

[0035] The present invention utilizes the gravity of the water to drive the collection drum 4 downward, simultaneously vibrating the filter 5 during this downward movement. This prevents clogging of the filter 5 and improves filtration efficiency. Simultaneously, the first pull cord 14 pulls the sealing ball 122 upward, creating a seal with the first sealing ring 11, sealing the heating water supply and achieving the automatic shutoff function of the exhaust valve 2. Furthermore, the second pull cord 15 drives the second sealing ring 13 upward, tightly cooperating with the sealing ball 122, further enhancing the sealing effect on the heating water supply.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An automatic shutoff device for exhaust valve of a heating system, comprising a connecting pipe (1) arranged on a heating pipe, the top of the connecting pipe (1) being connected to an exhaust valve (2), characterized in that: The exhaust valve (2) is provided with a support plate (3), and a collecting cylinder (4) is movably provided at the bottom of the support plate (3). A filter screen (5) for filtering impurities in water is slidably provided in the collecting cylinder (4), and the filter screen (5) is located directly below the exhaust pipe (21) of the exhaust valve (2). A vibration component for driving the filter screen (5) to vibrate is provided on the collecting cylinder (4); a blocking component for blocking water flow is provided in the connecting pipe (1), and the blocking component is connected to the collecting cylinder (4). When the heating water gradually drains into the collecting cylinder (4) through the exhaust pipe of the exhaust valve (2), the collecting cylinder (4) gradually moves downward under the gravity of the water, and blocks the water flow in the connecting pipe (1) through the blocking component.

2. The automatic shut-off device for exhaust valve of heating system according to claim 1, characterized in that: The vibration assembly comprises a rotating shaft (43) rotatably inserted into the collecting barrel (4), a cam (44) fixedly mounted on the rotating shaft (43), and a driving assembly for driving the rotating shaft (43) to rotate. During the rotation of the cam (44), the cam (44) is in sliding and pushing engagement with the filter screen (5).

3. The automatic shut-off device for exhaust valve of heating system according to claim 2, characterized in that: The driving assembly comprises a vertical plate (32) fixedly arranged at the bottom of the support plate (3), a rack (33) fixedly arranged along the extension direction of the vertical plate (32), and a gear (45) fixedly arranged on the rotating shaft (43), wherein the gear (45) meshes with the rack (33).

4. The automatic shut-off device for exhaust valve of heating system according to claim 1, characterized in that: The blocking assembly comprises a first blocking ring (11) and a fixed ring (12) fixedly arranged in the connecting pipe (1) and arranged at intervals, and a blocking ball (122) movably arranged in the connecting pipe (1); a conical spring (121) is fixedly arranged on the fixed ring (12); a radially narrower end of the conical spring (121) is fixedly connected to the blocking ball (122); the blocking ball (122) is fixedly connected to a first pull rope (14); the other end of the first pull rope (14) is fixedly connected to the collecting tube (4); in the process of the collecting tube (4) gradually moving downward, the first pull rope (14) drives the blocking ball (122) to seal with the inner hole of the first blocking ring (11), thereby blocking the water flow.

5. The automatic shut-off device for exhaust valve of heating system according to claim 4, characterized in that: A first guide wheel (141) for guiding the first pull rope (14) is rotatably provided in the support plate (3), the exhaust valve (2), and the connecting pipe (1). The first pull rope (14) is sequentially wound around the first guide wheel (141) in the support plate (3), the exhaust valve (2), and the connecting pipe (1).

6. The automatic shut-off device for exhaust valve of heating system according to claim 4, characterized in that: The outer side of the exhaust valve (2) is provided with a distance adjustment component for adjusting the moving distance of the second pull rope (15), the distance adjustment component is connected to the collecting cylinder (4), a second sealing ring (13) is slidably provided in the connecting pipe (1), the inner hole of the second sealing ring (13) is sealed with the sealing ball (122), the second sealing ring (13) is fixedly connected to the second pull rope (15), and the other end of the second pull rope (15) is connected to the distance adjustment component.

7. The automatic shut-off device for exhaust valve of heating system according to claim 6, characterized in that: The pitch adjustment assembly comprises a connecting shaft (6) rotatably arranged outside the exhaust valve (2), a first winding drum (62) and a second winding drum (63) fixedly arranged on the connecting shaft (6), the diameter of the first winding drum (62) being larger than the diameter of the second winding drum (63), the first winding drum (62) being fixedly connected to the second pull rope (15), a third pull rope (631) being wound around the outer periphery of the second winding drum (63), and the third pull rope (631) being fixedly connected to the collecting drum (4).

8. The automatic shut-off device for exhaust valve of heating system according to claim 7, characterized in that: A second guide wheel (151) for guiding the second pull rope (15) is rotatably provided in the support plate (3), the exhaust valve (2), and the connecting pipe (1). The second pull rope (15) is sequentially wound around the second guide wheel (151) in the support plate (3), the exhaust valve (2), and the connecting pipe (1).

9. The automatic shut-off device for exhaust valve of heating system according to claim 6, characterized in that: A sealing sleeve (131) that seals with the sealing ball (122) is fixedly provided at the inner holes of the first sealing ring (11) and the second sealing ring (13).

10. The automatic shut-off device for exhaust valve of heating system according to claim 1, characterized in that: The filter screen (5) is hemispherical.

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