Automatic pressure type opening and closing pipeline for flue gas heat exchange

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By designing a flue gas heat exchange automatic pressure opening and closing pipeline, using the combination of the opening and closing valve plate, corrugated telescopic pipe and spring, the mechanical automatic control of the flue gas pipeline and electrical signal feedback are achieved, solving the problem of high-temperature flue gas heat utilization and monitoring accuracy, and improving the flue gas heat exchange efficiency and monitoring accuracy.

CN222849249UActive Publication Date: 2025-05-09SUZHOU CHI SIGNAL ENERGY SAVING TECH CO LTD

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Patent Information

Application Number: CN202420831777.1
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-04-22
Publication Date: 2025-05-09
Estimated Expiration: 2034-04-22

AI Technical Summary

Technical Problem

During the process of incineration and treatment of garbage waste, the heat of high-temperature flue gas is difficult to effectively utilize, and the existing monitoring methods are easily affected by the packaging of smoke particles and the temperature hysteresis, which makes it difficult to accurately monitor the high-temperature airflow in the flue gas channel.

Method used

A flue gas heat exchange automatic pressure opening and closing pipe is designed. Through the combination of the opening and closing valve plate, the first metal corrugated telescopic pipe, the second metal telescopic corrugated pipe and the spring, the mechanical automatic control of the opening and closing of the flue gas pipeline is realized, and the low-temperature water supply and high-temperature flue gas flow are ensured through electrical signal feedback.

Benefits of technology

It realizes the mechanical automatic control of opening and closing of the flue gas pipeline under the action of high-temperature airflow and spring, avoiding the problem of low-temperature water continuing to supply due to the lack of high-temperature flue gas in the opening and closing channel or the low flue gas flow. At the same time, the smoke particles are prevented from adhesion through the corrugated telescopic tube, which improves monitoring accuracy.

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Abstract

The utility model discloses an automatic pressure type opening and closing pipeline for flue gas heat exchange. The automatic pressure type opening and closing pipeline comprises an opening and closing channel body, a square shaft, an opening and closing valve plate, a first shaft sleeve, a second shaft sleeve, a first metal telescopic corrugated pipe, a spring, a third shaft sleeve, a fourth shaft sleeve, a second metal telescopic corrugated pipe, a metal feeler lever and a metal sliding sleeve. According to the opening and closing pipeline, the low-temperature water flow of the supply pipeline corresponds to the high-temperature flue gas flow in the opening and closing channel body, and the problem that the low-temperature water supply pipeline still continues to supply water due to the fact that no high-temperature flue gas exists in the opening and closing channel body or the high-temperature flue gas flow and the temperature are low is solved; at the moment, the opening and closing valve plate moves leftwards under the action of the first spring to seal the frustum cylinder section. In addition, by arranging the first metal corrugated telescopic pipe and the second metal corrugated telescopic pipe, smoke particles can be prevented from adhering to the square shaft in the sliding area of the opening and closing valve plate.

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Description

Technical Field

[0001] The utility model belongs to the technical field of flue gas waste heat recovery, in particular to a flue gas heat exchange automatic pressure type opening and closing pipeline. Background Art

[0002] During the incineration process of garbage and waste, high-temperature flue gas will be generated. If these high-temperature gases are discharged directly, on the one hand, it will pollute the environment, and on the other hand, the heat in the high-temperature flue gas cannot be effectively utilized, resulting in waste. Energy recovery is carried out through heat exchange between high-temperature flue gas and low-temperature water. The generation of high-temperature flue gas is not continuous. When high-temperature flue gas is not generated, it is still exchanged with low-temperature water in the flue gas heat exchange equipment, which affects the use of hot water at the back end. The method of monitoring through air pressure sensors is prone to accuracy due to the air pressure sensor being covered by smoke particles for a long time. The monitoring method through temperature sensors has hysteresis. The reason is that the flue gas channel cannot be cooled quickly in a short period of time. Therefore, it is difficult to monitor whether there is high-temperature airflow in the flue gas channel. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a flue gas heat exchange pipeline which can mechanically and automatically control the opening and closing of the flue gas pipeline under the cooperation of high-temperature airflow and spring and feedback the flue gas through electrical signals.

[0004] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: a flue gas heat exchange automatic pressure-type opening and closing pipeline, including an opening and closing channel body, a square shaft, an opening and closing valve plate, a first sleeve, a second sleeve, a first metal bellows telescopic tube, a first spring, a third sleeve, a fourth sleeve, a second metal telescopic bellows, a metal touch rod and a metal sliding sleeve, the opening and closing channel body is composed of a small-diameter cylindrical section, a frustum cylindrical section and a large-diameter cylindrical section integrally formed, the small-diameter cylindrical section and the large-diameter cylindrical section are respectively provided with a first flange and a second flange at the outer ends, support rings are respectively fixedly installed in the first flange and the second flange, the two ends of the square shaft are fixedly installed on the support rings, and the second sleeve and the third sleeve are both fixedly sealed and sleeved. Installed on the square shaft, the first sleeve, the fourth sleeve, the opening and closing valve plate, and the metal sleeve are all slidably sleeved and installed on the square shaft, the first sleeve and the fourth sleeve are fixedly and sealedly installed on both sides of the opening and closing valve plate, the opening and closing valve plate is set to a frustum-shaped structure that matches the inside of the frustum tube section, the two ends of the first metal corrugated telescopic tube are respectively sealed and fixedly connected with the first sleeve and the second sleeve, the two ends of the second metal telescopic bellows are respectively sealed and fixedly connected with the third sleeve and the fourth sleeve, the first spring is sleeved and installed on the square shaft, the two ends of the first spring act on the first sleeve and the second sleeve respectively, the metal touch rod is arranged on the top surface of the square shaft in an inclined linear distribution, and the metal sleeve is fixedly connected through the connecting rod fourth sleeve.

[0005] Furthermore, it also includes a guide sleeve and a second spring. An installation channel is arranged inside the square shaft. The upper part of the metal touch rod is slidably installed on the top of the installation channel. The guide sleeve is threaded and fixedly installed on the bottom of the installation channel. The lower part of the metal touch rod is slidably installed in the guide sleeve. The upper part of the metal touch rod is fixedly sleeved with a limit ring. The second spring is sleeved on the metal touch rod. The upper and lower ends of the second spring act on the limit ring and the guide sleeve respectively. The upper part of the metal sliding sleeve is provided with a pressure contact hole matching the metal touch rod.

[0006] Furthermore, the top of the metal touch rod is configured as a spherical structure.

[0007] Furthermore, both left and right ends of the pressure contact hole are configured as bevel structures.

[0008] Furthermore, the inner diameter of the large-diameter cylindrical section is 1.3-1.8 times the inner diameter of the small-diameter cylindrical section.

[0009] Compared with the prior art, the utility model is beneficial in that the opening and closing pipeline can realize that the low-temperature water flow of the supply pipeline corresponds to the flow of high-temperature flue gas in the opening and closing channel body, avoiding the problem that the low-temperature water supply pipeline continues to supply water due to the absence of high-temperature flue gas or the low flow and temperature of high-temperature flue gas in the opening and closing channel body. At this time, the opening and closing valve plate moves to the left under the action of the first spring to close the frustum tube section. In addition, by setting the first metal bellows and the second metal bellows, smoke particles can be prevented from adhering to the square shaft in the sliding area of the opening and closing valve plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The utility model is further described below in conjunction with the accompanying drawings.

[0011] Figure 1 It is a schematic diagram of the internal structure of the utility model.

[0012] Figure 2 yes Figure 1 Enlarged structural diagram at M.

[0013] Figure 3 It is a schematic diagram of the installation structure of the metal contact rod and the guide sleeve.

[0014] Figure 4 yes Figure 3 Schematic diagram of the enlarged structure at N. DETAILED DESCRIPTION

[0015] The utility model is described in detail below in conjunction with specific implementation methods:

[0016] like Figures 1 to 4The flue gas heat exchange automatic pressure-type opening and closing pipeline shown in the figure comprises an opening and closing channel body 1, a square shaft 2, an opening and closing valve plate 3, a first sleeve 31, a second sleeve 32, a first metal bellows telescopic tube 33, a first spring 34, a third sleeve 35, a fourth sleeve 36, a second metal telescopic bellows 37, a metal feeler rod 4 and a metal sleeve 5. The opening and closing channel body 1 is formed by a small-diameter cylindrical section 11, a frustum cylindrical section 12 and a large-diameter cylindrical section 13 being integrally formed. The outer ends of the small-diameter cylindrical section 11 and the large-diameter cylindrical section 13 are respectively provided with a first flange and a second flange, and support rings are respectively fixedly installed in the first flange and the second flange, and both ends of the square shaft 2 are fixedly installed on the support rings, and the second sleeve 31 and the third sleeve 35 are both fixedly and sealingly sleeved on the square shaft 2, and the first sleeve 31, the fourth sleeve 36, the opening and closing valve plate 3, and the metal sleeve 5 are all slidably sleeved on the square shaft 2. 1. The fourth sleeve 36 is fixedly and sealedly installed on both sides of the opening and closing valve plate 3. The opening and closing valve plate 3 is set to a frustum-shaped structure that matches the inside of the frustum tube section 12. The two ends of the first metal corrugated telescopic tube 33 are respectively sealed and fixedly connected with the first sleeve 31 and the second sleeve 32. The two ends of the second metal telescopic bellows 37 are respectively sealed and fixedly connected with the third sleeve 35 and the fourth sleeve 36. The first spring 34 is sleeved and installed on the square shaft 2. The two ends of the first spring 34 act on the first sleeve 31 and the second sleeve 32 respectively. The metal feeler rod 4 is arranged on the top surface of the square shaft 2 in an inclined linear distribution. The metal sleeve 5 is fixedly connected to the fourth sleeve 36 through the connecting rod 51. A control module is also included. The metal sleeve 5 circuit is connected to the power supply, and each metal feeler rod 4 is respectively connected to the control module through the wire circuit. The low-temperature water supply pipeline flow adjustable battery valve is connected to the control module through the circuit.

[0017] It also includes a guide sleeve 6 and a second spring 7. An installation channel 21 is provided inside the square shaft 2. The upper part of the metal contact rod 4 is slidably installed on the top of the installation channel 21. The guide sleeve 6 is screwed and fixedly installed on the bottom of the installation channel 21. The lower part of the metal contact rod 4 is slidably installed in the guide sleeve 6. The upper part of the metal contact rod 4 is fixedly sleeved and installed with a limiting ring 41. The second spring 7 is sleeved and installed on the metal contact rod 4. The upper and lower ends of the second spring 7 act on the limiting ring 41 and the guide sleeve 6 respectively. A pressure contact hole 52 matching with the metal contact rod 4 is provided on the upper part of the metal sleeve 5. After the pressure contact hole 52 contacts the metal contact rod 4, it squeezes it to overcome the elastic force of the second spring 7 and moves downward, and makes the pressed metal contact rod 4 connected with the metal sleeve 5 circuit to generate an electrical signal. Under the elastic force compensation of the second spring 7, even if the contact position of the metal contact rod 4 and the metal sleeve 5 is worn during long-term use, the two can still be crimped and connected.

[0018] The top of the metal contact rod 4 is set as a spherical structure, and the left and right ends of the pressure contact hole 52 are set as bevel structures, so that the metal contact rod 4 can easily fit into the pressure contact hole 52 of the metal sleeve 5 after overcoming the elastic force of the second spring 7 and retracting downward.

[0019] As a preferred setting structure of the opening and closing channel body 1, the inner diameter of the large-diameter cylindrical section 13 is 1.35 times the inner diameter of the small-diameter cylindrical section 11, so as to avoid the problem that the opening and closing valve plate 3 has difficulty in closing and sealing the conical cylinder section 12 due to the inner diameter of the large-diameter cylindrical section 13 being too large relative to the inner diameter of the small-diameter cylindrical section 11.

[0020] When high-temperature flue gas is generated during incineration, the high-temperature flue gas enters the opening and closing channel body 1, and the opening and closing valve plate 3 is pushed to move to the left under the action of the hot air flow to overcome the elastic force of the first spring 34. The opening and closing valve plate 3 is pushed to move to different positions according to the different flow rates of the hot air flow of the high-temperature flue gas. The metal sleeve 5 fixedly mounted on the fourth shaft sleeve 36 slides to the right synchronously with the opening and closing valve plate 3. After the opening and closing valve plate 3 contacts 1-2 of them, a circuit path is formed to generate an electrical signal to the control module. The control module controls the flow rate of the adjustable battery valve of the low-temperature water supply pipeline according to the electrical signal generated by the metal touch rods 4 at different positions, so as to realize that the low-temperature water flow rate of the supply pipeline corresponds to the flow rate of the high-temperature flue gas in the opening and closing channel body 1. When the metal sleeve 5 contacts 1-2 metal touch rods 4 at the far left, the control module controls the adjustable battery valve to close.

Claims

1. A flue gas heat exchange automatic pressure opening and closing pipeline, characterized in that: The invention comprises an opening and closing channel body (1), a square shaft (2), an opening and closing valve plate (3), a first shaft sleeve (31), a second shaft sleeve (32), a first metal bellows telescopic tube (33), a first spring (34), a third shaft sleeve (35), a fourth shaft sleeve (36), a second metal telescopic bellows (37), a metal feeler rod (4) and a metal sliding sleeve (5); the opening and closing channel body (1) is formed by a small-diameter cylindrical section (11), a frustum cylindrical section (12) and a large-diameter cylindrical section (13) being integrally formed; the small-diameter cylindrical section (11) and the large-diameter cylindrical section (13) are respectively provided with a first flange and a second flange at the outer ends thereof; support rings are respectively fixedly installed in the first flange and the second flange; both ends of the square shaft (2) are fixedly installed on the support rings; the second shaft sleeve (32) and the third shaft sleeve (35) are both fixedly and sealingly sleeved on the square shaft (2); the first shaft sleeve (31), the fourth shaft sleeve (36), the opening and closing valve plate (37) and the opening and closing valve plate (38) are respectively fixedly and sealingly sleeved on the square shaft (2); the first shaft sleeve (31), the fourth shaft sleeve (36), the opening and closing valve plate (38) and the opening and closing valve plate (39) are respectively fixedly and sealingly sleeved on the square shaft (2); the first shaft sleeve (31), the fourth shaft sleeve (36), the opening and closing valve plate (39) and the opening and closing valve plate (4 ... The plate (3) and the metal sleeve (5) are both slidably sleeved and mounted on the square shaft (2); the first sleeve (31) and the fourth sleeve (36) are fixedly and sealably mounted on both sides of the opening and closing valve plate (3); the opening and closing valve plate (3) is arranged as a frustum-shaped structure that matches the inside of the frustum-shaped cylinder section (12); the two ends of the first metal bellows telescopic tube (33) are respectively sealed and fixedly connected to the first sleeve (31) and the second sleeve (32); the two ends of the second metal telescopic bellows (37) are respectively sealed and fixedly connected to the third sleeve (35) and the fourth sleeve (36); the first spring (34) is sleeved and mounted on the square shaft (2); the two ends of the first spring (34) act on the first sleeve (31) and the second sleeve (32) respectively; the metal feeler rod (4) is arranged on the top surface of the square shaft (2) in an inclined linear distribution; and the metal sleeve (5) is fixedly connected to the fourth sleeve (36) via a connecting rod (51).

2. The automatic pressure-type opening and closing pipeline for flue gas heat exchange according to claim 1 is characterized in that: It also comprises a guide sleeve (6) and a second spring (7); a mounting channel (21) is arranged inside the square shaft (2); the upper part of the metal touch rod (4) is slidably mounted on the top of the mounting channel (21); the guide sleeve (6) is screwed and fixedly mounted on the bottom of the mounting channel (21); the lower part of the metal touch rod (4) is slidably mounted in the guide sleeve (6); the upper part of the metal touch rod (4) is fixedly sleeved with a limit ring (41); the second spring (7) is sleeved on the metal touch rod (4); the upper and lower ends of the second spring (7) act on the limit ring (41) and the guide sleeve (6) respectively; and the upper part of the metal sliding sleeve (5) is provided with a pressure contact hole (52) matching the metal touch rod (4).

3. The automatic pressure-type opening and closing pipeline for flue gas heat exchange according to claim 2 is characterized in that: The top of the metal contact rod (4) is configured as a spherical structure.

4. The automatic pressure-type opening and closing pipeline for flue gas heat exchange according to claim 2 is characterized in that: The left and right ends of the pressure contact hole (52) are both arranged as bevel structures.

5. The automatic pressure-type opening and closing pipeline for flue gas heat exchange according to claim 1 is characterized in that: The inner diameter of the large-diameter cylindrical section (13) is 1.3-1.8 times the inner diameter of the small-diameter cylindrical section (11).