Valve well of heat supply pipe network of thermal power plant

Abstract

The invention belongs to the technical field of valve wells, and particularly relates to a valve well of a thermal power plant heat supply pipe network, which comprises a base, a valve well main body is arranged on the upper surface of the base, and a heat supply pipe main body penetrates through the outer surface of the valve well main body. In the embodiment, in the first state, the well lid body is opened, the hinge rotates to drive the tooth set to push the connecting clamping groove, the transmission rod rotates through the bearing, the bevel gear is meshed, kinetic energy is transmitted to the adjusting block, the baffles are driven to rotate, the transmission wheel drives the other baffle to rotate synchronously through the transmission belt till the baffle shields the heat supply pipe body, and mistaken touch is avoided. And in the second state, the well lid body is closed, the tooth set drives the transmission rod to rotate reversely, the bevel gear drives the adjusting block to rotate reversely, the baffle is made to be perpendicular to the heat supply pipe body, heat dissipation or ventilation of the pipeline is facilitated, the risk of damage caused by too high temperature is reduced, the safety during overhauling is improved, and self-adaptive adjustment can be achieved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of valve wells, and particularly relates to a valve well of a heating pipe network of a thermal power plant. BACKGROUND

[0002] The valve well of the heating pipe network of the thermal power plant is a special underground structure for installing, operating and repairing valves in the heating pipe network, providing a safe space for the operation and maintenance personnel to open and close the valves, check the pipeline state or handle faults, protecting the valves, sensors and other equipment from being eroded by the external environment (such as soil pressure, underground water), and part of the design includes a damping device that can buffer the impact of pipeline vibration on the valve well, prolonging the service life. The valve well is usually composed of a well body and a well cover. The well body is usually a concrete or prefabricated assembly structure, and a gravel layer is laid at the bottom to drain water and prevent moisture. The well cover is matched with an anti-settlement support cover, and part of the design adds a pull-out handle for easy and quick opening. The existing patent No. CN115506410A discloses a valve well of a heating pipe network of a thermal power plant, which includes a valve well for conveniently opening and closing the heating pipe network of the thermal power plant, an well cover matched with the valve well, and a damping device arranged on both sides of the valve well for buffering the pipeline vibration. The valve well is provided with the damping device near the bottom on both sides. The damping device includes a lower fixed plate, an upper fixed plate, a force transmission slider, a damping spring a and a damping spring b. The force transmission slider is in the shape of a right-angled trapezoid, and is symmetrically arranged in the damping device with the right-angled edges connected with the upper fixed plate and the lower fixed plate, respectively. The damping spring b is arranged between the two symmetric force transmission sliders, and the damping spring a is arranged between the upper fixed plate and the lower fixed plate. The present application reduces the impact on the valve well caused by the pipeline vibration, increases the service life of the valve well, and improves the practicality of the valve well.

[0003] However, in the above technical solution, the pipeline is still exposed inside the valve well, and the space of the valve well is usually narrow during maintenance work. Due to this limitation, the maintenance personnel may accidentally touch the pipeline during the work process, resulting in unnecessary operation risks, and even may cause damage to the pipeline or pose a threat to personnel safety. The protective equipment can only be laid manually by the workers, which has limitations. SUMMARY

[0004] To solve the problems in the background art, the present application provides a valve well of a heating pipe network of a thermal power plant, which has the advantages of self-adaptive adjustment and high installation during maintenance work.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solution: a valve well of a heating pipe network of a thermal power plant, comprising a base, wherein the upper surface of the base is provided with a valve well body, and the outer surface of the valve well body is provided with a heating pipe body in a penetrating manner, and the outer surface of the heating pipe body is provided with a control valve in a communicating manner. The valve well of the heating pipe network of the thermal power plant further comprises: The well lid assembly is arranged on the upper surface of the valve well body, and comprises a frame body, and a well lid body rotatably connected to the inside of the frame body; The protection mechanism is arranged in the inside of the valve well body and comprises two baffles; The first transmission assembly is arranged on the lower surface of the well lid assembly, and comprises a transmission rod and a connecting clamping groove, the transmission rod is arranged in the inside of the valve well body, and the connecting clamping groove is arranged on the upper end of the transmission rod; The second transmission assembly is arranged on one side of the protection mechanism; When the well lid body is opened, the baffle can be switched between the first state and the second state, in the first state, the well lid body drives the first transmission assembly, the first transmission assembly drives the baffle to rotate, the second transmission assembly drives the other baffle to rotate, so that the two baffles cover the upper part of the heat supply pipe body, in the second state, the well lid body is closed, the well lid body drives the first transmission assembly, and the first transmission assembly and the second transmission assembly drive the two baffles to reset.

[0006] As a valve well of a heat supply pipe network of a thermal power plant, the protection mechanism further comprises: Two support blocks are fixedly connected to the inner wall surface of the valve well body at one end; Two adjusting blocks are rotatably connected to the outer surface of the support block at one side through bearings.

[0007] By adopting the above technical scheme, the two support blocks are fixedly connected to the inner wall surface of the valve well body at one end, the support blocks play a supporting and fixing role, provide a stable foundation for other components, ensure firm installation of the protection mechanism in the valve well, and the two adjusting blocks are rotatably connected to the outer surface of the support block at one side through bearings, the adjusting blocks can be connected with the support block through bearings and have a certain degree of rotational freedom, so that the position can be adjusted as required during work, thereby realizing accurate protection of the internal space of the valve well.

[0008] As a valve well of a heat supply pipe network of a thermal power plant, the first transmission assembly further comprises: A gear set is fixed to the outer surface of the well lid body and matched with the connecting clamping groove; Two fixed blocks are arranged on the outer surface of the transmission rod close to the two ends through bearings; A conical gear one is fixed to the lower end of the transmission rod; A conical gear two is rotatably connected to the outer surface of the adjusting block through a rotating shaft.

[0009] By adopting the technical scheme, the transmission rod is arranged in the interior of the valve well main body, is responsible for transmitting operating force and works cooperatively with other components, the connecting clamping groove is arranged at the upper end of the transmission rod, is used for cooperating with other mechanical components, ensures accurate operation of the transmission assembly, the gear set is fixed to the outer surface of the well lid main body and is matched with the connecting clamping groove, the gear set is used for driving the transmission rod through meshing, the fixed block is arranged on the outer surface of the transmission rod close to both ends through the bearing sleeve, provides support and stability, ensures that the transmission rod can smoothly and stably operate when working, the conical gear one is fixed to the lower end of the transmission rod, is responsible for transmitting the rotating force of the transmission rod to downstream components, the conical gear two is rotatably connected to the outer surface of the adjusting block through the rotating shaft, the conical gear two further transmits power to the adjusting block through meshing with the conical gear one, so that the position of the baffle can be accurately adjusted.

[0010] As a kind of valve well of heat supply pipe network of thermal power plant of the application, the transmission assembly two includes: Transmission wheel, two are arranged, and one side is rotatably connected to the outer surface of adjusting block through rotating shaft; Transmission belt, is arranged on the outer surface of two transmission wheels.

[0011] By adopting the technical scheme, one side of two transmission wheels is rotatably connected to the outer surface of adjusting block through rotating shaft, can effectively transmit power, so that adjusting block can realize rotation or position adjustment, cooperates transmission belt to complete work task, transmission belt is arranged on the outer surface of two transmission wheels, plays the role of connecting two transmission wheels and transmitting power, through the connection of belt, two transmission wheels rotate synchronously, so that adjusting block can stably and coordinately complete adjusting action.

[0012] As a kind of valve well of heat supply pipe network of thermal power plant of the application, the cross section of two baffles is circular arc, and the width of two baffles is greater than or equal to the diameter of heat supply pipe main body.

[0013] By adopting the technical scheme, if leakage occurs, steam will diffuse along the inner wall surface of the inclined baffle and be guided upward, avoiding horizontal injection of steam to personnel operation area, reducing the influence of leakage on maintenance personnel.

[0014] As a kind of valve well of heat supply pipe network of thermal power plant of the application, the cross section of the baffle is concentric with the heat supply pipe main body.

[0015] By adopting the technical scheme, a gap of 20 centimeters is reserved between the baffle and the heat supply pipe main body, allowing common maintenance tools such as glue gun, endoscope, hydraulic wrench, etc. to smoothly extend and operate, thereby realizing pressure plugging.

[0016] As a kind of valve well of heat supply pipe network of thermal power plant of the application, the well lid assembly further includes: A support plate is fixed to the lower surface of the frame body. A holding hole is formed on the outer surface of the well lid body.

[0017] By adopting the above technical scheme, the support plate is welded to the lower surface of the frame body, and the rotation stroke of the well lid body is limited.

[0018] As a preferred valve well of a heat supply pipe network of a thermal power plant, the teeth of the tooth group are equidistantly distributed.

[0019] By adopting the above technical scheme, the support plate restricts the opening and closing angle of the well lid body, prevents it from falling into the well due to excessive rotation, and facilitates the rotation of the well lid body through the holding hole, which is away from the hinge and has a rounded edge.

[0020] Compared with the prior art, the present application has the following advantages: 1. The valve well of the heat supply pipe network of the thermal power plant, in use, in the first state, the well lid body is opened, and when the well lid body rotates through the hinge, the tooth group pushes the connecting slot, so that the transmission rod is forced to rotate inside the two fixed blocks through the bearing, the kinetic energy is transmitted to the adjusting block through the meshing of the teeth of the bevel gear one and the teeth of the bevel gear two, the adjusting block drives a baffle to rotate through the shaft and the bearing, and one transmission wheel drives another transmission wheel to rotate through the transmission belt, so that another baffle rotates synchronously, until the two baffles block the upper part of the heat supply pipe body, preventing the heat supply pipe body from being touched by mistake when the staff is overhauled, in the second state, the well lid body is closed, the tooth group drives the transmission rod to rotate reversely through the connecting slot, the bevel gear one and the bevel gear two drive the adjusting block to rotate reversely, so that the two transmission wheels and the transmission belt drive another adjusting block to rotate reversely, until the two baffles are perpendicular to the heat supply pipe body, which is helpful for heat dissipation or ventilation of the heat supply pipe body, reduces the risk of damage of the heat supply pipe body due to excessive temperature, and can adaptively adjust to improve the safety during overhauling.

[0021] 2. The valve well of the heat supply pipe network of the thermal power plant, a gap is reserved between the baffle and the heat supply pipe body, allowing common maintenance tools such as glue injection gun, endoscope, hydraulic wrench, etc. to smoothly extend and operate, thereby realizing pressure leakage stoppage, facilitating personnel to observe the weld and flange state of the heat supply pipe body, and also enabling efficient and accurate maintenance work to be completed during the maintenance process. The position of the gap is set at the bottom of the baffle, especially considering the case of steam leakage. If leakage occurs, the steam will diffuse along the inclined inner wall surface of the baffle and be guided upward, avoiding horizontal injection of steam to the personnel operation area, reducing the impact of leakage on the maintenance personnel, effectively improving the safety and operation experience during the maintenance process, reducing the risk caused by steam leakage, and ensuring a safer and more comfortable working environment, further improving work efficiency and the overall experience of personnel.

[0022] 3. The valve well of the heat supply pipe network of the thermal power plant, the support plate is welded on the lower surface of the frame body, limits the rotation stroke of the well cover body, converts the vertical load borne by the well cover body such as vehicle rolling into the shear force of the frame body, reduces the stress concentration of the well cover body, improves the bearing capacity, avoids deformation caused by excessive stress of the well cover body, improves the bearing capacity of the well cover assembly, at the same time, the support plate restricts the opening and closing angle of the well cover body, prevents it from rotating excessively and falling into the well, pulls the well cover body to rotate through the holding hole, the holding hole is away from the hinge, the edge is rounded, convenient to hold, increases the force arm of the rotating well cover body, saves the manpower when opening the well cover body, improves the use experience when opening and closing the well cover body. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings are included to provide a further understanding of the application, and constitute a part of the specification, illustrate the application together with the embodiments thereof, and explain the application without limiting the application. In the drawings: Figure 1 It is a structure schematic view of the valve well of the heat supply pipe network of the thermal power plant in the application; Figure 2 It is a sectional view schematic view of the valve well of the heat supply pipe network of the thermal power plant in the application; Figure 3 It is a local schematic view of the gear set of the valve well of the heat supply pipe network of the thermal power plant in the application; Figure 4 It is a three-dimensional structure schematic view of the transmission assembly one of the valve well of the heat supply pipe network of the thermal power plant in the application; Figure 5 It is a structure schematic view of the well cover body of the valve well of the heat supply pipe network of the thermal power plant in the application; Figure 6 It is a bottom view three-dimensional structure schematic view of the protection mechanism of the valve well of the heat supply pipe network of the thermal power plant in the application; Figure 7 It is a top view three-dimensional structure schematic view of the connecting clamping groove of the valve well of the heat supply pipe network of the thermal power plant in the application; Figure 8 It is a bottom view three-dimensional structure schematic view of the well cover assembly of the valve well of the heat supply pipe network of the thermal power plant in the application; In the drawings: 1, base; 2, valve well body; 3, well cover assembly; 301, frame body; 302, support plate; 303, well cover body; 304, holding hole; 4, heat supply pipe body; 5, protection mechanism; 501, baffle; 502, adjusting block; 503, support block; 6. Transmission assembly one; 601. Transmission rod; 602. Connecting slot; 603. Gear assembly; 604. Fixing block; 605. Bevel gear one; 606. Bevel gear two; 7. Transmission assembly two; 701. Transmission wheel; 702. Transmission belt; 8. Control valve. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] like Figures 1-8 As shown: A valve well for a heating pipeline network in a thermal power plant includes a base 1, a valve well body 2 disposed on the upper surface of the base 1, a heating pipe body 4 penetrating the outer surface of the valve well body 2, a control valve 8 connected to the outer surface of the heating pipe body 4, and a well cover assembly 3 disposed on the upper surface of the valve well body 2. The well cover assembly 3 includes a frame 301, and a well cover body 303 rotatably connected inside the frame 301. The valve well of the heating pipeline network in the thermal power plant also includes: The protective mechanism 5 is installed inside the valve well body 2 and includes two baffles 501. Transmission component 6 is installed on the lower surface of manhole cover component 3; Transmission component 2 7 is located on one side of the protective mechanism 5; When the manhole cover body 303 is open, the baffle 501 can switch between a first state and a second state. In the first state, the manhole cover body 303 drives the transmission component 6, which in turn drives the baffle 501 to rotate. The transmission component 7 drives the other baffle 501 to rotate, so that the two baffles 501 cover the top of the heating pipe body 4. In the second state, the manhole cover body 303 is closed. The manhole cover body 303 drives the transmission component 6, which in turn drives the two baffles 501 to reset.

[0026] As examples, in this embodiment, the protective mechanism 5 includes: a baffle 501, an adjusting block 502, and a support block 503.

[0027] The protective baffle 501 is fixed to the lower surface of the adjusting block 502 by welding.

[0028] The adjusting block 502, which plays a rotating role, is rotatably connected to one side of the support block 503 via a bearing; The support block 503, which plays a supporting role, is fixed to the inner wall surface of the valve well body 2 by hexagonal bolts.

[0029] It should be noted that both the adjusting block 502 and the bearing are made of metal-ceramic composite material, which are existing materials, so we will not go into too much detail here.

[0030] As examples, in this embodiment, the transmission assembly 6 includes: a transmission rod 601, a connecting slot 602, a toothed gear set 603, a fixing block 604, a bevel gear 605, and a bevel gear 606.

[0031] The transmission rod 601, which plays a transmission role, is rotatably connected to the inside of two fixed blocks 604 through bearings.

[0032] The connecting slot 602, which serves as a connection, is laser-cut at the upper end of the transmission rod 601.

[0033] Among them, the tooth assembly 603, which plays a connecting role, is welded to the outer surface of the manhole cover body 303.

[0034] The fixing block 604, which plays a supporting role, is fixed to the inner wall surface of the valve well body 2 by hexagonal bolts.

[0035] Among them, the bevel gear 605, which plays the role of changing the direction of force transmission, is fixed to the lower end of the transmission rod 601 by hexagonal bolts.

[0036] Among them, the bevel gear 606, which plays the role of transmitting force, is fixed by the outer surface of the rotating shaft and the adjusting block 502.

[0037] As some examples, in this embodiment, transmission assembly 2 7 includes: transmission wheel 701 and transmission belt 702.

[0038] The transmission wheel 701, which plays a role in transmission, is fixed to the outer surface of the adjusting block 502 by means of a rotating shaft and bolts.

[0039] The transmission belt 702, which serves as a connector, is fitted onto the outer surface of the two transmission wheels 701.

[0040] In use, the first state is entered, and the manhole cover body 303 is opened. The manhole cover body 303 rotates via a hinge, and the toothed assembly 603 pushes the connecting slot 602, thereby causing the transmission rod 601 to be stressed and rotate within the two fixed blocks 604 through the bearings. Through the meshing of the teeth of bevel gear one 605 and bevel gear two 606, kinetic energy is effectively transmitted to the adjusting block 502, causing the adjusting block 502 to drive the baffle 501 to rotate via the shaft and bearings. At the same time, one transmission wheel 701 drives another transmission wheel 701 to rotate via the transmission belt 702, thereby synchronously driving the other baffle 501, so that the two baffles 501 can cover the area above the heating pipe body 4, preventing workers from accidentally touching the heating pipe body 4 during maintenance and ensuring maintenance safety. When entering the second state, the manhole cover body 303 is closed. The toothed assembly 603 drives the transmission rod 601 to rotate in the opposite direction via the connecting slot 602. The first bevel gear 605 and the second bevel gear 606 work together to drive the adjusting block 502 to rotate in the opposite direction. Simultaneously, the two transmission wheels 701 and the transmission belt 702 work in coordination to drive the other adjusting block 502 to rotate in the opposite direction. After this process, the two baffles 501 will return to a position perpendicular to the heating pipe body 4, ultimately closing the manhole cover body 303. This further improves the safety and efficiency of maintenance operations. The mechanical transmission structure achieves automated operation, greatly reducing the complexity of manual operation and potential safety hazards.

[0041] Please see Figures 1-8 As shown: A valve well for a heating pipeline network in a thermal power plant has two baffles 501 with arc-shaped cross-sections, and the width of the two baffles 501 is greater than or equal to the diameter of the heating pipe body 4. The cross-sections of the baffles 501 and the heating pipe body 4 are concentric circles.

[0042] In this embodiment, a 20 cm gap is reserved between the baffle 501 and the heating pipe body 4, allowing commonly used maintenance tools such as caulking guns, endoscopes, and hydraulic wrenches to be easily inserted and operated, thereby achieving pressurized leak sealing. This design not only facilitates personnel to bend down and observe the welds and flanges of the heating pipe body 4, but also enables efficient and precise maintenance work during the inspection process. The gap is located at the bottom of the baffle 501, specifically considering the possibility of steam leakage. In the event of a leak, the steam will diffuse along the inclined inner wall surface of the baffle 501 and be guided upwards, preventing steam from being sprayed horizontally into the personnel operating area and reducing the impact of the leak on maintenance personnel. This design effectively improves safety and operating experience during the maintenance process, reduces the risks caused by steam leakage, and ensures a safer and more comfortable working environment, further improving work efficiency and the overall experience of personnel.

[0043] Please see Figures 1-8 As shown: A valve well for a heating pipeline network of a thermal power plant, the well cover assembly 3 further includes: a support plate 302, fixed to the lower surface of the frame 301; The gripping hole 304 is formed on the outer surface of the manhole cover body 303.

[0044] In this embodiment, the support plate 302 is welded to the lower surface of the frame 301, limiting the rotation stroke of the manhole cover body 303. The support plate 302 converts the vertical load borne by the manhole cover body 303, such as vehicle crushing, into shear force of the frame 301, reducing stress concentration in the manhole cover body 303, improving load-bearing capacity, preventing the manhole cover body 303 from deforming due to excessive stress, and improving the load-bearing capacity of the manhole cover assembly 3. At the same time, the support plate 302 constrains the opening and closing angle of the manhole cover body 303, preventing it from rotating excessively and falling into the well. The manhole cover body 303 is rotated by pulling through the grip hole 304. The grip hole 304 is far from the hinge and has rounded edges for easy gripping, increasing the lever arm for rotating the manhole cover body 303, saving manpower when opening the manhole cover body 303, and improving the user experience when opening and closing the manhole cover body 303.

[0045] The implementation principle of the valve well in the heating pipeline network of a thermal power plant according to the present invention is as follows: In use, in the first state, the manhole cover body 303 is opened. When the manhole cover body 303 rotates via the hinge, the toothed assembly 603 pushes the connecting slot 602, causing the transmission rod 601 to rotate inside the two fixed blocks 604 under force through the bearings. The teeth of the first bevel gear 605 and the second bevel gear 606 mesh, transmitting kinetic energy to the adjusting block 502. The adjusting block 502 then drives a baffle 501 to rotate via the shaft and bearings. One transmission wheel 701 drives another transmission wheel 701 via the transmission belt 702. 1. Rotate to make the other baffle 501 rotate synchronously until the two baffles 501 block the top of the heating pipe body 4. 2. Close the manhole cover body 303. The toothed assembly 603 drives the transmission rod 601 to rotate in the opposite direction through the connecting slot 602. The first bevel gear 605 and the second bevel gear 606 drive the adjusting block 502 to rotate in the opposite direction, causing the two transmission wheels 701 and the transmission belt 702 to drive the other adjusting block 502 to rotate in the opposite direction until the two baffles 501 are perpendicular to the heating pipe body 4, and the manhole cover body 303 is closed.

[0046] A 20 cm gap is reserved between the baffle 501 and the main body of the heating pipe 4, allowing commonly used maintenance tools such as glue guns, endoscopes, and hydraulic wrenches to be inserted for operation, enabling pressurized leak sealing. This also facilitates personnel to bend over and observe the welds and flanges of the main body of the heating pipe 4. The gap is located at the bottom of the baffle 501, and when steam leaks, it is guided upward by the angle of the inclined inner wall surface of the baffle 501.

[0047] The support plate 302 is welded to the lower surface of the frame 301, limiting the rotation stroke of the manhole cover body 303. The support plate 302 converts the vertical load borne by the manhole cover body 303, such as vehicle crushing, into shear force of the frame 301, reducing stress concentration in the manhole cover body 303, improving load-bearing capacity, preventing the manhole cover body 303 from deforming due to excessive stress, and improving the load-bearing capacity of the manhole cover assembly 3. At the same time, the support plate 302 constrains the opening and closing angle of the manhole cover body 303, preventing it from rotating excessively and falling into the well. The manhole cover body 303 is rotated by pulling through the grip hole 304. The grip hole 304 is far from the hinge and has rounded edges for easy gripping, increasing the lever arm for rotating the manhole cover body 303.

[0048] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A valve well for a heating network in a thermal power plant, comprising a base (1), a valve well body (2) disposed on the upper surface of the base (1), a heating pipe body (4) penetrating the outer surface of the valve well body (2), and a control valve (8) connected to the outer surface of the heating pipe body (4), characterized in that: The valve wells of the heating pipeline network of the thermal power plant also include: The manhole cover assembly (3) is disposed on the upper surface of the valve well body (2). The manhole cover assembly (3) includes: a frame (301), and the manhole cover body (303) is rotatably connected inside the frame (301). The protective mechanism (5) is installed inside the valve well body (2) and includes baffles (501), two of which are provided; Transmission assembly 1 (6) is disposed on the lower surface of the well cover assembly (3). The transmission assembly 1 (6) includes a transmission rod (601) and a connecting slot (602). The transmission rod (601) is disposed inside the valve well body (2), and the connecting slot (602) is opened at the upper end of the transmission rod (601). Transmission component two (7) is located on one side of the protective mechanism (5); When the manhole cover body (303) is opened, the baffle (501) can switch between a first state and a second state. In the first state, the manhole cover body (303) drives the first transmission component (6) to rotate the baffle (501), and the second transmission component (7) drives the other baffle (501) to rotate so that the two baffles (501) cover the top of the heating pipe body (4). In the second state, the manhole cover body (303) is closed, and the manhole cover body (303) drives the first transmission component (6) to reset the two baffles (501) with the first transmission component (6) and the second transmission component (7).

2. The valve well of the heating pipeline network of a thermal power plant according to claim 1, characterized in that: The protective mechanism (5) also includes: There are two support blocks (503), and one end of each is fixedly connected to the inner wall surface of the valve well body (2); There are two adjusting blocks (502), and one side of them is rotatably connected to the outer surface of the support block (503) via a bearing.

3. The valve well of the heating pipeline network of a thermal power plant according to claim 2, characterized in that: The transmission assembly one (6) also includes: The tooth assembly (603) is fixed to the outer surface of the manhole cover body (303) and matches the connecting slot (602); There are two fixing blocks (604), which are sleeved on the outer surface of the transmission rod (601) near both ends by bearings; A bevel gear (605) is fixed to the lower end of the transmission rod (601); The second bevel gear (606) is rotatably connected to the outer surface of the adjusting block (502) via a rotating shaft.

4. The valve well of the heating pipeline network of a thermal power plant according to claim 1, characterized in that: The transmission assembly two (7) includes: Two drive wheels (701) are provided, and one side is rotatably connected to the outer surface of the adjusting block (502) via a rotating shaft; The drive belt (702) is fitted onto the outer surface of the two drive pulleys (701).

5. The valve well of the heating pipeline network of a thermal power plant according to claim 1, characterized in that: The cross-sections of the two baffles (501) are arc-shaped, and the width of the two baffles (501) is greater than or equal to the diameter of the heating pipe body (4).

6. The valve well of the heating pipeline network of a thermal power plant according to claim 1, characterized in that: The cross-section of the baffle (501) is concentric with the heating pipe body (4).

7. The valve well of the heating pipeline network of a thermal power plant according to claim 6, characterized in that: The manhole cover assembly (3) also includes: The support plate (302) is fixed to the lower surface of the frame (301); The gripping hole (304) is formed on the outer surface of the manhole cover body (303).

8. The valve well of the heating pipeline network of a thermal power plant according to claim 3, characterized in that: The teeth of the tooth group (603) are equidistantly distributed.

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