Air volume adjusting valve for boiler

Abstract

The utility model discloses an air volume regulating valve for a boiler, which relates to the technical field of butterfly valves and comprises a valve seat, a valve plate and a valve rod, the valve rod is rotatably connected with the valve seat, the valve plate is fixedly mounted on the valve rod, a positioning clamp is arranged at the top of the valve rod, a heat exchange rib is arranged on the inner end face of the valve seat, and a heat dissipation flow channel is arranged in the side wall of the valve seat. The valve seat is provided with a water inlet and a water outlet which are communicated with the heat dissipation flow channel, and an adjusting piston which is movably connected is arranged in the water inlet. The air volume regulating valve has the advantages of automatically regulating the cooling intensity, improving the use efficiency of a refrigerant and uniformly dissipating heat, and solves the problems of deformation of the valve plate and accelerated aging of a sealing element caused by thermal stress of the traditional air volume regulating valve.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valve technology, specifically to a boiler air volume regulating valve. Background Technology

[0002] In industrial boiler applications, air volume regulating valves are important components for controlling the amount of air supplied during combustion. Traditional air volume regulating valves usually only focus on adjusting the opening of the airflow, while ignoring the thermal stress caused to the valve body by the high-temperature airflow passing through the valve. This thermal stress may cause deformation of the valve plate or accelerated aging of the seals, thereby shortening the service life of the valve and potentially leading to reduced energy efficiency and increased maintenance costs. The impact of hot airflow on valves at the boiler exhaust outlet is particularly significant.

[0003] To address the aforementioned issues, some attempts have been made in the prior art, such as installing a cooling device within the valve body to reduce the operating temperature. However, these solutions often suffer from problems such as low refrigerant utilization efficiency and uneven heat dissipation leading to localized overheating and deformation of the valve body. Furthermore, traditional designs lack a mechanism that can automatically adjust the cooling intensity according to the airflow, resulting in either overcooling and wasting resources or insufficient cooling that fails to protect the valve body. Therefore, a boiler airflow regulating valve is needed to solve these problems. Utility Model Content

[0004] The purpose of this utility model is to provide a boiler air volume regulating valve that has the advantages of automatically adjusting cooling intensity, improving refrigerant utilization efficiency, and uniform heat dissipation, and solves the problems of valve plate deformation and accelerated aging of seals caused by thermal stress in traditional air volume regulating valves.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a boiler air volume regulating valve, comprising a valve seat, a valve plate, and a valve stem, wherein the valve stem is rotatably connected to the valve seat, the valve plate is fixedly installed on the valve stem, a positioning clamp is provided at the top of the valve stem, a heat exchange protrusion is provided on the inner end face of the valve seat, a heat dissipation channel is provided in the side wall of the valve seat, and an inlet and an outlet communicating with the heat dissipation channel are provided on the valve seat, and a regulating piston is movably connected in the inlet.

[0006] As a preferred embodiment of the boiler air volume regulating valve of this utility model, the heat exchange protrusion is a plurality of arc-shaped protrusions, the heat exchange protrusions are equidistantly arranged in a circular array on the inner end face of the valve seat, and the edges of the heat exchange protrusions are rounded.

[0007] In a preferred embodiment of the boiler air volume regulating valve of this utility model, the regulating piston is installed near the heat dissipation channel at the water inlet, and the regulating piston is installed inside the water inlet and slidably sealed to it. The valve stem is provided with a cam that cooperates with the regulating piston.

[0008] As a preferred embodiment of the boiler air volume regulating valve of this utility model, a compression spring is sleeved on the regulating piston, a limiting plate that cooperates with the compression spring is provided on the regulating piston, and the regulating piston and the valve seat are elastically slidably connected by the compression spring.

[0009] As a preferred embodiment of the boiler air volume regulating valve of this utility model, the limiting plate is provided with a rotatably connected roller, and the side end face of the cam is kept in contact with the roller.

[0010] As a preferred embodiment of the boiler air volume regulating valve of this utility model, the heat dissipation channel has a spiral structure and the valve seat is made of brass.

[0011] As a preferred embodiment of the boiler air volume regulating valve of this utility model, the positioning clamp includes a first clamping plate and a second clamping plate, the first clamping plate and the second clamping plate are elastically rotatably connected by a torsion spring, the valve seat is provided with a positioning plate, the lower end face of the second clamping plate is provided with a locking pin, and the positioning plate is evenly provided with locking grooves that cooperate with the locking pin.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model significantly increases the contact area between the valve seat and the high-temperature airflow by setting equidistant circular array arc-shaped heat exchange protrusions on the inner end face of the valve seat. Combined with the refrigerant circulating in the spiral heat dissipation channel, a dual heat dissipation mechanism is formed. The rounded corner design of the heat exchange protrusions reduces airflow dead zones and dust accumulation, while the spiral flow channel improves the uniformity of contact between the refrigerant and the valve seat. This structure effectively reduces the working temperature of the valve seat and valve plate, solves the problems of valve plate deformation and rapid aging of sealant caused by thermal stress in traditional regulating valves, and significantly extends the service life of the valve.

[0014] 2. This utility model, through the linkage design of adjusting piston and valve stem cam, when the valve stem is rotated to adjust the air volume, the cam squeezes the adjusting piston to change the inlet opening, so that the cooling water flow and air volume increase or decrease synchronously; the elastic reset function of the compression spring ensures the dynamic balance of the opening adjustment, and the roller structure further reduces the friction loss between the cam and the piston, solving the problem of refrigerant waste in traditional valve cooling systems, realizing on-demand cooling, reducing energy consumption while ensuring heat dissipation efficiency, and improving the environmental performance of the equipment. Attached Figure Description

[0015] Figure 1 This is a first-view overall structural diagram of the present invention;

[0016] Figure 2 This is a front view of the present invention;

[0017] Figure 3 For the present utility model Figure 2Sectional view of AA in the middle;

[0018] Figure 4 For the present utility model Figure 3 Cross-sectional view of the middle section (BB);

[0019] Figure 5 For the present utility model Figure 3 Enlarged view at point C;

[0020] Figure 6 This is a schematic diagram of the overall structure of the present invention from a second perspective.

[0021] In the diagram: 1. Valve seat; 101. Heat exchange protrusion; 102. Positioning plate; 1021. Slot; 103. Inlet; 104. Outlet; 105. Heat dissipation channel; 106. Adjusting piston; 1061. Limiting plate; 1062. Roller; 107. Compression spring; 2. Valve plate; 3. Valve stem; 301. Cam; 4. Positioning clamp; 401. First clamping plate; 402. Second clamping plate; 4021. Pin. Detailed Implementation

[0022] Please see Figures 1-6 A boiler air volume regulating valve includes a valve seat 1, a valve plate 2, and a valve stem 3. The valve stem 3 is rotatably connected to the valve seat 1, the valve plate 2 is fixedly installed on the valve stem 3, a positioning clip 4 is provided on the top of the valve stem 3, a heat exchange protrusion 101 is provided on the inner end face of the valve seat 1, a heat dissipation channel 105 is provided in the side wall of the valve seat 1, and an inlet 103 and an outlet 104 communicating with the heat dissipation channel 105 are provided on the valve seat 1. An adjusting piston 106 is movably connected in the inlet 103.

[0023] Furthermore, the heat exchange ridge 101 consists of several arc-shaped ridges, and the heat exchange ridge 101 is arranged in an equidistant circular array on the inner end face of the valve seat 1, with the edges of the heat exchange ridge 101 rounded.

[0024] By providing several arc-shaped protrusions on the inner end face of the valve seat 1, the contact area between the valve seat 1 and the hot airflow discharged from the furnace is increased, thereby rapidly cooling the airflow and preventing it from becoming too hot, which could cause the valve plate 2 to deform under thermal stress or cause the sealant on the edge of the valve plate 2 to age too quickly. The edges of the heat exchange protrusion 101 are rounded to reduce dead corners and prevent dust accumulation.

[0025] Furthermore, the adjusting piston 106 is installed in the water inlet 103 near the heat dissipation channel 105. The adjusting piston 106 is installed inside the water inlet 103 and is slidably sealed to it. The valve stem 3 is provided with a cam 301 that cooperates with the adjusting piston 106.

[0026] When the valve stem 3 is rotated, the cam 301 presses the regulating piston 106, thereby changing the position of the regulating piston 106 and adjusting the shielding area of ​​the piston 106 on the heat dissipation channel 105, thereby controlling the refrigerant flow rate. This allows the refrigerant flow rate to be adjusted along with the airflow, avoiding waste of cooling water and improving the environmental performance of the equipment.

[0027] Furthermore, a compression spring 107 is fitted on the adjusting piston 106, and a limiting plate 1061 that cooperates with the compression spring 107 is provided on the adjusting piston 106. The adjusting piston 106 and the valve seat 1 are elastically slidably connected through the compression spring 107.

[0028] When the cam 301 presses against the limiting plate 1061, the limiting plate 1061 compresses the spring to store energy. When the cam 301 is no longer pressing against the limiting plate 1061, the piston can rebound under the elastic potential energy of the compression spring 107, thereby increasing the opening of the heat dissipation channel 105.

[0029] Furthermore, a rotatably connected roller 1062 is provided on the limiting plate 1061, and the side end face of the cam 301 is in contact with the roller 1062.

[0030] The roller 1062 reduces the friction between the limiting plate 1061 and the cam 301, thereby reducing the wear of the cam 301 and the limiting plate 1061 and extending the service life of the equipment.

[0031] Furthermore, the heat dissipation channel 105 has a spiral structure, and the valve seat 1 is made of brass.

[0032] The spiral heat dissipation channel 105 increases the contact area between the refrigerant and the valve seat 1, and improves the uniformity of heat dissipation, avoiding uneven heating and cooling of the valve seat 1, which could cause deformation and damage. Brass has good thermal conductivity.

[0033] Furthermore, the positioning clamp 4 includes a first clamping plate 401 and a second clamping plate 402. The first clamping plate 401 and the second clamping plate 402 are elastically rotatably connected by a torsion spring. A positioning disk 102 is provided on the valve seat 1. A locking pin 4021 is provided on the lower end face of the second clamping plate 402. The positioning disk 102 is evenly provided with locking grooves 1021 that cooperate with the locking pin 4021.

[0034] By gripping the positioning plate 102 and pressing the second clamping plate 402, the locking pin 4021 slides out of the slot 1021, thereby releasing the limit on the valve stem 3. The valve stem 3 can then be rotated to adjust the valve opening. After adjustment, the second clamping plate 402 is released, allowing the locking pin 4021 to engage with the slot 1021, thus interlocking the valve stem 3 with the valve seat 1 and preventing the valve plate 2 from rotating under the action of airflow, thereby changing the valve opening.

[0035] When using this device, connect the inlet 103 and outlet 104 to an external cooling system, such as a faucet, through pipes, ensuring a good seal to prevent refrigerant leakage. Grasp the first clamp 401 and the second clamp 402 of the positioning plate 102, press the second clamp 402, and the locking pin 4021 at the lower end of the second clamp 402 will slide out of the slot 1021 of the positioning plate 102, releasing the mechanical lock on the valve stem 3. Manually rotate the valve stem 3, causing the valve plate 2 to rotate around the central axis of the valve seat 1, changing the valve opening. The cam 301 on the valve stem 3 rotates synchronously, its side end contacting the roller 1062 of the adjusting piston 106. The squeeze roller 1062 pushes the adjusting piston 106 to slide along the inlet 103, compressing the spring 107. The adjusting piston 106 blocks the change in the area of ​​the inlet 103, thereby controlling the flow rate of refrigerant entering the heat dissipation channel 105 and realizing the linkage adjustment of air volume and cooling volume. After adjusting to the required opening, the second clamp 402 is released, the torsion spring drives the clamp to reset, and the locking pin 4021 is re-engaged into the slot 1021 of the positioning plate 102 to prevent the valve stem 3 from rotating on its own due to the impact of airflow. The refrigerant flows spirally in the spiral heat dissipation channel 105, prolonging the contact time and improving the heat dissipation uniformity, preventing the valve seat 1 from being locally overheated and deformed.

[0036] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A boiler air volume regulating valve, comprising a valve seat (1), a valve plate (2), and a valve stem (3), wherein the valve stem (3) is rotatably connected to the valve seat (1), and the valve plate (2) is fixedly mounted on the valve stem (3), characterized in that: The valve stem (3) is provided with a positioning clip (4) at the top, the valve seat (1) is provided with a heat exchange protrusion (101) on the inner end face, the valve seat (1) is provided with a heat dissipation channel (105) in the side wall, the valve seat (1) is provided with an inlet (103) and an outlet (104) communicating with the heat dissipation channel (105), and an adjusting piston (106) is provided in the inlet (103).

2. The boiler air volume regulating valve as described in claim 1, characterized in that: The heat exchange protrusions (101) are a number of arc-shaped protrusions, and the heat exchange protrusions (101) are arranged in an equidistant circular array on the inner end face of the valve seat (1).

3. The boiler air volume regulating valve as described in claim 2, characterized in that: The edges of the heat exchange protrusion (101) are rounded.

4. The boiler air volume regulating valve as described in claim 3, characterized in that: The valve seat (1) is made of brass.

5. A boiler air volume regulating valve as described in claim 4, characterized in that: The regulating piston (106) is installed in the water inlet (103) near the heat dissipation channel (105). The regulating piston (106) is installed in the water inlet (103) and is slidably sealed to it. The valve stem (3) is provided with a cam (301) that cooperates with the regulating piston (106).

6. The boiler air volume regulating valve as described in claim 5, characterized in that: A compression spring (107) is sleeved on the adjusting piston (106), and a limiting plate (1061) that cooperates with the compression spring (107) is provided on the adjusting piston (106). The adjusting piston (106) and the valve seat (1) are elastically slidably connected by the compression spring (107).

7. A boiler air volume regulating valve as described in claim 6, characterized in that: The limiting plate (1061) is provided with a rotatably connected roller (1062), and the side end face of the cam (301) is in contact with the roller (1062).

8. The boiler air volume regulating valve as described in claim 1, characterized in that: The heat dissipation channel (105) has a spiral structure.

9. A boiler air volume regulating valve as described in claim 1, characterized in that: The positioning clamp (4) includes a first clamping plate (401) and a second clamping plate (402), which are elastically rotatably connected by a torsion spring.

10. A boiler air volume regulating valve as described in claim 9, characterized in that: The valve seat (1) is provided with a positioning plate (102), and the lower end face of the second clamping plate (402) is provided with a locking pin (4021). The positioning plate (102) is evenly provided with locking grooves (1021) that cooperate with the locking pin (4021).

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