Air valve of boiler soot blower

Abstract

The utility model relates to an air valve of a boiler soot blower, and belongs to the technical field of air valves of boiler soot blowers, the air valve comprises a valve shell, a valve cover connected with the valve shell and a stainless steel ball located in a cavity formed by the valve shell and the valve cover, a plurality of pairs of limiting sliding rods are arranged in the valve shell, the stainless steel ball penetrates through the limiting sliding rods, a sealing ring is communicated with the interior of the valve cover, and the sealing ring is connected with the valve cover. A sealing ring is arranged in the valve shell, a sealing cylinder is slidably communicated in the sealing ring, a rubber sealing seat is arranged on the lower side of the sealing cylinder, a stainless steel spring is arranged between the rubber sealing seat and the sealing ring, an elastic buffering piece is arranged in the valve shell, and a rubber buffering seat is arranged at the other end of the elastic buffering piece. According to the boiler soot blower air valve, the stainless steel ball is effectively protected, directional movement of the stainless steel ball is achieved, the stainless steel ball is prevented from rolling and making contact with the inner wall of the valve shell and the inner wall of the valve cover to be abraded, and meanwhile the situation that the stainless steel ball moves to rigidly impact the valve shell and the valve cover under the air pressure effect to affect the sealing effect of the stainless steel ball is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of air valves for boiler soot blowers, specifically air valves for boiler soot blowers. Background Technology

[0002] A sootblower is a device used to remove ash from the heating surface of a boiler. It usually consists of components such as a sootblowing pipe and operating valves. It is generally installed on the furnace wall in the boiler furnace, horizontal flue, and tail flue. According to the structural type, there are several types such as gun type, rotary type, and telescopic type. The air valve of the boiler sootblower is an important component for maintaining the air pressure inside and outside the sootblower.

[0003] Please refer to the prior art disclosed in Chinese patent CN215172565U, which describes an air valve for a sootblower, including a valve body and a valve cover. Both the inner side of the valve body and the outer side of the valve cover are threaded. A cavity is formed inside the valve body and valve cover, and a stainless steel ball is placed inside the cavity. The diameter of the cavity is larger than the inner diameter of the valve body and valve cover, while the outer diameter of the stainless steel ball is smaller than the diameter of the cavity but larger than the inner diameter of the valve body and valve cover. A retaining ring for a hole is installed on the inner wall of the valve body, and a positioning block is connected to the center of the retaining ring. This invention has a reasonable structure. When the pressure inside the sootblower is lower than the external pressure, the stainless steel ball moves away from the valve cover. At this time, the external air pressure separates the stainless steel ball from the inner cavity of the valve cover, and the airflow enters the sootblower through the cavity to maintain the pressure balance inside the sootblower. When the pressure inside the sootblower is greater than the external pressure, the stainless steel ball is pushed back to its initial position by the air pressure, so that one end of the stainless steel ball fits against the inner cavity of the valve cover, preventing external air pressure from entering the sootblower.

[0004] However, in the existing technology patent, when the stainless steel ball moves between the valve body and the valve cover, it will cause impact and wear with the valve body, the valve cover and the positioning block, resulting in an uneven surface of the stainless steel ball. As a result, when the pressure inside the soot blower is high, the stainless steel ball and the valve cover cannot fit together to achieve a sealing effect, resulting in air leakage. Therefore, this application designs an improved air valve for boiler soot blowers to solve this defect of the existing technology. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an air valve for a boiler soot blower.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a boiler sootblower air valve, comprising a valve body, a valve cover connected to the valve body, and a stainless steel ball located within the cavity formed by the valve body and the valve cover. The valve body contains multiple pairs of limiting slide rods through which the stainless steel ball passes. A sealing ring is connected within the valve cover, and a sealing cylinder is slidably connected within the sealing ring. A rubber sealing seat is provided on the lower side of the sealing cylinder. A stainless steel spring is provided between the rubber sealing seat and the sealing ring. An elastic buffer is provided within the valve body, and a rubber buffer seat is provided at the other end of the elastic buffer. An air hole is provided on the rubber sealing seat.

[0007] Using the above technical solution, when the air pressure inside the sootblower is lower than the external air pressure, the external airflow enters from the valve cover, passes through the sealing cylinder and air hole into the valve body, and pushes the stainless steel ball to move directionally on the limit slide rod. This allows the stainless steel ball to contact the rubber buffer seat, and the elastic buffering element to buffer the impact force, preventing the stainless steel ball from being damaged by impact. At the same time, the airflow enters the sootblower through the valve body. When the air pressure inside the sootblower is higher than the external air pressure, the air pressure pushes the stainless steel ball to move directionally in the opposite direction on the limit slide rod, and it fits and seals the air hole with the rubber sealing seat, preventing the external airflow from entering. As the stainless steel ball continues to move, it pushes the rubber sealing seat to move directionally on the sealing ring and compresses the stainless steel spring to buffer the impact force, effectively protecting the stainless steel ball.

[0008] As a preferred embodiment of this utility model, the rubber sealing seat and the rubber buffer seat are located above and below the stainless steel ball, respectively. The opposing surfaces of the rubber sealing seat and the rubber buffer seat are both arc surfaces, which respectively match the upper and lower arc surfaces of the stainless steel ball.

[0009] By adopting the above technical solution, it is ensured that the rubber sealing seat and rubber buffer seat can fit together with the stainless steel ball to bear the force, thus avoiding damage to the contact surface of the stainless steel ball caused by the small area of ​​the force-bearing point on the contact surface.

[0010] As a preferred embodiment of this utility model, the diameter of the sealing ring is equal to the inner diameter of the valve cover, the inner diameter of the sealing ring is equal to the diameter of the sealing cylinder, and the stainless steel spring is sleeved on the outside of the sealing cylinder.

[0011] By adopting the above technical solution, the sealing ring and the sealing cylinder are properly fitted and sealed to prevent air leakage.

[0012] As a preferred embodiment of this utility model, a telescopic rubber tube is provided between the rubber sealing seat and the inner wall of the valve cover, and the telescopic rubber tube is located outside the stainless steel spring.

[0013] By adopting the above technical solution, the telescopic rubber tube can extend and retract with the movement of the rubber sealing seat, while further improving the sealing effect between the rubber sealing seat and the valve cover.

[0014] As a preferred embodiment of this utility model, the elastic buffer includes a support rod, a hollow cylinder, a return spring, and a buffer ring. The support rod is installed inside the valve housing, and the upper end of the support rod is connected to the hollow cylinder. The return spring is installed inside the hollow cylinder, and the other end of the return spring is connected to the rubber buffer seat. The buffer ring is connected to the lower end of the rubber buffer seat and is located outside the return spring.

[0015] Using the above technical solution, when the stainless steel ball moves and contacts the rubber buffer seat, the return spring inside the hollow cylinder contracts to buffer the impact force. At the same time, when the air intake pressure is high, the buffer ring contacts the hollow cylinder and squeezes to assist in buffering, reducing the impact force between the stainless steel ball and the rubber buffer seat.

[0016] As a preferred technical solution of this utility model, when the stainless steel ball is located at the bottom of the limiting slide bar, the reset spring is in the maximum compression state, and the buffer ring contacts the hollow cylinder and is compressed, while the rubber buffer seat has a gap with the inner wall of the valve body.

[0017] By adopting the above technical solution, it is ensured that when the stainless steel ball moves to its maximum limit, the external airflow can enter the soot blower through the gap between the rubber buffer seat and the valve body.

[0018] As a preferred technical solution of this utility model, when the stainless steel ball is located at the top of the limiting slide bar, the stainless steel ball fits against the sealing rubber sealing seat and the stainless steel spring is in a fully compressed state.

[0019] By adopting the above technical solution, the maximum buffering effect of the sealing rubber sealing seat on the stainless steel ball is guaranteed.

[0020] As a preferred technical solution of this utility model, the upper opening of the valve cover is provided with a waterproof and breathable membrane and a dustproof net.

[0021] Using the above technical solution, external airflow enters through the valve cover, and together with the waterproof and breathable membrane and dustproof net, it achieves the effect of waterproofing and dustproofing.

[0022] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0023] 1. In this boiler sootblower air valve, when the internal air pressure of the sootblower is lower than the external air pressure, the external airflow enters through the valve cover, passes through the sealing cylinder and air hole into the valve body, and pushes the stainless steel ball to move directionally on the limit slide rod. This causes the stainless steel ball to contact the rubber buffer seat and push the rubber buffer seat to move. When the rubber buffer seat moves, it works with the elastic buffer to buffer the impact force and prevent the stainless steel ball from being damaged by impact. At the same time, the airflow enters the sootblower through the valve body. When the air pressure inside the sootblower is higher than the external air pressure, the air pressure pushes the stainless steel ball to move directionally in the opposite direction on the limit slide rod and to fit against the rubber sealing seat to seal and block the air hole, preventing the external airflow from entering. As the stainless steel ball continues to move, it pushes the rubber sealing seat to move directionally on the sealing ring and compresses the stainless steel spring to buffer the impact force, effectively protecting the stainless steel ball. This achieves directional movement of the stainless steel ball, preventing the stainless steel ball from rolling and contacting the inner wall of the valve body and valve cover for wear. It also prevents the stainless steel ball from impacting the valve body and valve cover under air pressure, thus avoiding affecting the sealing effect of the stainless steel ball.

[0024] 2. The air valve of this boiler soot blower, through the installation of a waterproof and breathable membrane and a dustproof net, achieves a waterproof and dustproof effect when external airflow enters through the valve cover, in conjunction with the waterproof function of the waterproof and breathable membrane and the dustproof function of the dustproof net, thus preventing airflow from entering the soot blower and air valve and causing corrosion of the components. Attached Figure Description

[0025] Figure 1 This is a perspective view of the present utility model;

[0026] Figure 2 This is a side perspective view of the present invention;

[0027] Figure 3 This is a cross-sectional perspective view of the present invention;

[0028] Figure 4 This is a three-dimensional view of the interior of this utility model;

[0029] Figure 5 This is a perspective view of the interior side of this utility model;

[0030] Figure 6 This is an enlarged perspective view of point A of this utility model.

[0031] In the diagram: 1. Valve housing; 2. Valve cover; 3. Stainless steel ball; 4. Limiting slide bar; 5. Sealing ring; 6. Sealing cylinder; 7. Rubber sealing seat; 8. Stainless steel spring; 9. Telescopic rubber tube; 10. Air hole; 11. Elastic buffer; 1101. Support rod; 1102. Hollow cylinder; 1103. Return spring; 1104. Buffer ring; 12. Rubber buffer seat; 13. Waterproof and breathable membrane; 14. Dustproof net. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Please see Figure 1-3 The boiler soot blower air valve in this embodiment includes a valve body 1, a valve cover 2 that is assembled and fixed with the valve body 1, and a stainless steel ball 3 located in the internal cavity formed by the valve body 1 and the valve cover 2. The lower end of the valve body 1 is connected to a flange, which facilitates horizontal connection to the side of the soot blower by fastening screws.

[0034] Multiple pairs of equidistant, annularly distributed limiting slide rods 4 are fixed inside the valve housing 1. Stainless steel balls 3 pass through the limiting slide rods 4, allowing the balls to slide linearly on them. A sealing ring 5 connects to the inner wall of the valve cover 2. The diameter of the sealing ring 5 is equal to the inner diameter of the valve cover 2, ensuring a tight seal between the sealing ring 5 and the valve cover 2. A sealing cylinder 6 slides within the sealing ring 5, with the inner diameter of the sealing ring 5 equal to the diameter of the sealing cylinder 6, ensuring a tight seal between the sealing ring 5 and the sealing cylinder 6. A rubber sealing seat 7 is fixed to the lower side of the sealing cylinder 6. The rubber sealing seat 7 is made of flexible rubber to reduce wear from contact with the stainless steel spring 8. A stainless steel spring 8 is installed and fixed between the rubber sealing seat 7 and the sealing ring 5. The stainless steel spring 8 is sleeved on the outside of the sealing cylinder 6. When the stainless steel spring 8 is in a naturally extended state, the sealing cylinder 6 and the sealing ring 5 do not separate, thus avoiding the inability to reset after separation. The rubber sealing seat 7 is connected to the inner wall of the valve cover 2 by a telescopic rubber tube 9. The telescopic rubber tube 9 is made of stretchable and retractable rubber material and is located on the outside of the stainless steel spring 8. The rubber sealing seat 7 is provided with an air hole 10. When the stainless steel ball 3 is at the top of the limiting slide bar 4, the stainless steel ball 3 fits against the sealing rubber sealing seat 7 and puts the stainless steel spring 8 in a fully compressed state.

[0035] In the above scheme, when the air pressure inside the sootblower is greater than the external air pressure, the air pressure enters through the valve shell 1, pushing the stainless steel ball 3 to move directionally on the limiting slide rod 4 and seal against the rubber sealing seat 7, thus blocking the air hole 10 and preventing external airflow from entering through the air hole 10. Simultaneously, under the action of air pressure, as the stainless steel ball 3 continues to move, it pushes the rubber sealing seat 7 to move directionally on the sealing ring 5, and the telescopic rubber tube 9 synchronously seals and compresses, while compressing the stainless steel spring 8 to buffer the impact force. This effectively protects the contact sealing surface of the stainless steel ball 3, achieving directional movement of the stainless steel ball 3 and preventing it from rolling and contacting the inner walls of the valve shell 1 and valve cover 2, thus avoiding wear. It also prevents the stainless steel ball 3 from impacting the valve shell 1 and valve cover 2 under air pressure, thus maintaining its sealing effect.

[0036] It should be further explained that the rubber sealing seat 7 and the rubber buffer seat 12 are located above and below the stainless steel ball 3, respectively. The opposite surfaces of the rubber sealing seat 7 and the rubber buffer seat 12 are both arc surfaces, which fit with the upper and lower arc surfaces of the stainless steel ball 3, respectively, to ensure the contact and sealing effect between the stainless steel ball 3 and the rubber sealing seat 7 and the rubber buffer seat 12 when the stainless steel ball 3 moves to both sides.

[0037] Please see Figure 3-6 The valve housing 1 is provided with an elastic buffer 11. The other end of the elastic buffer 11 is provided with a rubber buffer seat 12. The elastic buffer 11 includes a support rod 1101, a hollow cylinder 1102, a return spring 1103, and a buffer ring 1104. The support rod 1101 is installed and fixed on the inner wall of the valve housing 1 and there is a space between it and the valve housing 1 to facilitate the flow of air. The hollow cylinder 1102 is connected and fixed to the upper surface of the support rod 1101. The return spring 1103 is installed and fixed inside the hollow cylinder 1102. The other end of the return spring 1103 is connected and fixed to the rubber buffer seat 12. The buffer ring 1104 is connected and fixed to the lower end of the rubber buffer seat 12 and is located outside the return spring 1103. The rubber buffer seat 12 is made of silicone to reduce the impact force caused by the contact between the rubber buffer seat 12 and the stainless steel ball 3. The buffer ring 1104 is made of elastic rubber material.

[0038] When the stainless steel ball 3 is at the bottom of the limit slide bar 4, the return spring 1103 is in the maximum compression state, and the buffer ring 1104 contacts the hollow cylinder 1102 and is compressed. At the same time, there is a gap between the rubber buffer seat 12 and the inner wall of the valve body 1, so that the external airflow can enter the soot blower through the gap.

[0039] In the above scheme, when the air pressure inside the sootblower is lower than the external air pressure, the external airflow enters from the valve cover 2, passes through the sealing cylinder 6 and the air hole 10, and enters the valve body 1. Under the action of the airflow pressure, the stainless steel ball 3 is pushed to move in the opposite direction on the limiting slide rod 4, so that the stainless steel ball 3 contacts the rubber buffer seat 12 and pushes the rubber buffer seat 12 to move. When the rubber buffer seat 12 moves, it compresses the return spring 1103 in the hollow cylinder 1102 to buffer the impact force. The buffer ring 1104 moves and contacts the hollow cylinder 1102 to squeeze and assist in buffering the impact force, so as to avoid the stainless steel ball 3 moving and hard impacting the rubber buffer seat 12 and causing damage to the contact surface. At the same time, the incoming airflow enters the sootblower through the valve body 1.

[0040] Please see Figure 3 A waterproof and breathable membrane 13 and a dustproof net 14 are installed and fixed at the upper opening of the valve cover 2. The waterproof and breathable membrane 13 and the dustproof net 14 are distributed vertically to cover the opening of the valve cover 2. The dustproof net 14 is an activated carbon net.

[0041] Furthermore, when external airflow enters through the valve cover 2, it works in conjunction with the waterproof and breathable membrane 13 to achieve waterproof and dustproof effects, preventing airflow from entering the soot blower and air valve and causing corrosion of the components.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A boiler sootblower air valve comprising a valve housing, a valve cover connected to said valve housing, and a stainless steel ball located in the cavity formed by the valve housing and valve cover, characterized in that, The valve shell is provided with multiple pairs of limiting sliding rods, the limiting sliding rods are penetrated by stainless steel balls, the valve cover is communicated with a sealing ring, the sealing ring is slidably communicated with a sealing cylinder, the lower side of the sealing cylinder is provided with a rubber sealing seat, a stainless steel spring is arranged between the rubber sealing seat and the sealing ring, the valve shell is provided with an elastic buffer, the other end of the elastic buffer is provided with a rubber buffer seat, and the rubber sealing seat is provided with an air hole.

2. The boiler sootblower air valve of claim 1, wherein: The rubber sealing seat and the rubber buffer seat are located above and below the stainless steel ball respectively, the opposite surfaces of the rubber sealing seat and the rubber buffer seat are arc surfaces, and the arc surfaces are matched with the upper and lower arc surfaces of the stainless steel ball respectively.

3. The boiler sootblower air valve of claim 1, wherein: The diameter of the sealing ring is equal to the inner diameter of the valve cover, the inner diameter of the sealing ring is equal to the diameter of the sealing cylinder, and the stainless steel spring is sleeved outside the sealing cylinder.

4. The boiler sootblower air valve of claim 1, wherein: The rubber sealing seat and the valve cover are provided with an elastic rubber tube, and the elastic rubber tube is located outside the stainless steel spring.

5. The boiler sootblower air valve of claim 1, wherein: The elastic buffer comprises a supporting rod, a hollow cylinder, a reset spring and a buffer ring, the supporting rod is installed in the valve shell, the upper end of the supporting rod is connected with the hollow cylinder, the reset spring is installed in the hollow cylinder, the other end of the reset spring is connected with the rubber buffer seat, and the buffer ring is connected to the lower end of the rubber buffer seat and located outside the reset spring.

6. The boiler sootblower air valve of claim 5, wherein: When the stainless steel ball is located at the lowermost position of the limiting sliding rod, the reset spring is in the maximum compression state, the buffer ring contacts the hollow cylinder and is compressed, and the rubber buffer seat has a gap with the inner wall of the valve shell.

7. The boiler sootblower air valve of claim 1, wherein: When the stainless steel ball is located at the uppermost position of the limiting sliding rod, the stainless steel ball is attached to the sealing rubber sealing seat, and the stainless steel spring is in the fully compressed state.

8. The boiler sootblower air valve of claim 1, wherein: The upper opening of the valve cover is provided with a waterproof and breathable film and a dust screen.

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