Explosion-proof oil-sealed thermal resistor

Abstract

The application discloses an explosion-proof oil seal thermal resistance and belongs to the technical field of thermal resistance. The device comprises an explosion-proof terminal box, a temperature measuring rod is arranged below the explosion-proof terminal box, a heat exchange inner sleeve is fixedly arranged between the explosion-proof terminal box and the temperature measuring rod, insulating oil is filled in the explosion-proof terminal box and the heat exchange inner sleeve, a circuit in the temperature measuring rod is sealed and penetrates through the heat exchange inner sleeve, a heat exchange outer sleeve is coaxially arranged around the outside of the heat exchange inner sleeve, the heat exchange outer sleeve is closed at both ends, and a heat exchange cavity is formed between the heat exchange inner sleeve and the heat exchange outer sleeve. In the application, the pressure self-adapting mechanism is composed of an adapting cylinder, an elastic spacer and a sealing slide column. The adapting cylinder is in communication with the heat exchange inner sleeve, the end portion is provided with the elastic spacer, and the concave surface increases the deformation space. The mechanism can ensure that the internal oil pressure is stable when the external temperature changes sharply, effectively reduces the influence of the insulating oil pressure on the circuit components, and prolongs the service life of the equipment.

Description

Technical Field

[0001] This invention relates to the field of resistance temperature detectors (RTDs), and particularly to an explosion-proof oil-sealed RTD. Background Technology

[0002] A resistance temperature detector (RTD) is a sensor that measures temperature by utilizing the property that the resistance of a metal changes with temperature. Common materials include platinum and copper. When the temperature changes, its resistance value changes linearly or non-linearly. The temperature can be obtained by measuring the resistance value and converting it. It features high accuracy and good stability and is widely used in industrial temperature measurement.

[0003] Explosion-proof oil-sealed resistance temperature detectors (RTDs) are temperature measuring devices specifically designed for flammable and explosive environments. Their temperature sensing rod penetrates deep into the equipment to directly sense temperature, and the explosion-proof junction box is made of alloy casting and filled with insulating oil. When the sensing element malfunctions and generates an electric spark or high temperature, the insulating oil isolates oxygen and inhibits combustion. Simultaneously, the thick-walled structure of the junction box can withstand internal explosion pressure, preventing flame leakage. In high-temperature smelting scenarios in steel plant converters or high-pressure pyrolysis scenarios in chemical cracking furnaces, their explosion-proof performance can prevent chain explosions caused by temperature sensing element failure, ensuring safe and continuous production in high-risk areas.

[0004] The shortcomings of the existing technical solutions are as follows: In the high-temperature, large-temperature-difference scenarios of steel plant converters or chemical cracking furnaces, it is necessary to periodically start and stop the furnace. When the external ambient temperature fluctuates drastically, the internal insulating oil will undergo significant volume changes due to thermal expansion and contraction. When expanding at high temperatures, the oil squeezes the circuit components, which may lead to lead wire breakage, solder joint detachment, or insulation layer damage after prolonged use. In addition, frequent and large-scale temperature alternation will accelerate the aging of the insulating oil, causing changes in its viscosity and a decrease in its insulation performance. At the same time, the circuit components are subjected to thermal stress for a long time, which can easily lead to metal fatigue, resistance drift, or even short circuits, ultimately shortening the overall service life of the equipment. Summary of the Invention

[0005] This invention provides an explosion-proof oil-sealed thermal resistor, which can solve the problems in the prior art where drastic fluctuations in external ambient temperature and changes in the volume of insulating oil due to thermal expansion and contraction affect the overall service life of the equipment.

[0006] An explosion-proof oil-sealed resistance temperature detector (RTD) includes an explosion-proof junction box, a temperature measuring rod disposed below the junction box, and a heat exchange inner sleeve fixedly disposed between the junction box and the temperature measuring rod. Both the junction box and the inner sleeve are filled with insulating oil. The wiring inside the temperature measuring rod is sealed and passes through the inner sleeve. A heat exchange outer sleeve is coaxially arranged around the outer side of the inner sleeve, with both ends of the outer sleeve closed, forming a heat exchange cavity between the inner and outer sleeves. A circulating heat exchange mechanism is fixedly disposed on the outer sleeve for circulating and renewing the coolant inside the heat exchange cavity. A pressure adaptive mechanism is fixedly disposed on the side of the inner sleeve to ensure the stability of the internal oil pressure when the external temperature changes drastically.

[0007] As a further aspect of the present invention: the pressure adaptive mechanism includes an adaptive cylinder fixedly disposed on one side of the heat exchange inner sleeve, the interior of the adaptive cylinder being connected to the heat exchange inner sleeve, an elastic spacer being provided at the end of the adaptive cylinder, the elastic spacer being provided with a concave surface to increase the deformation space of the elastic spacer, a sealing slide post being slidably fitted inside the adaptive cylinder, the adaptive cylinder limiting the sealing slide post inside the adaptive cylinder to prevent excessive pressure from damaging the elastic spacer, and the sealing slide post dividing the internal space of the adaptive cylinder into two non-communicating parts.

[0008] As a further aspect of the present invention: multiple sets of flow guide baffles are longitudinally distributed inside the heat exchange outer tube to increase the travel of the coolant.

[0009] As a further aspect of the present invention: each set of flow guide baffles is sleeved on the heat exchange inner tube in a ring shape, and each set of flow guide baffles is provided with a flow guide port on one side to facilitate the passage of coolant. The flow guide ports on adjacent flow guide baffles are alternately distributed.

[0010] As a further aspect of the present invention: the circulating heat exchange mechanism includes an input pipe fixedly disposed on one side of the heat exchange outer tube and an output pipe fixedly disposed on the other side of the heat exchange outer tube. Coolant enters the heat exchange outer tube through the input pipe and leaves the heat exchange outer tube through the output pipe. A set of delivery pumps is connected to the other end of both the input pipe and the output pipe.

[0011] As a further aspect of the present invention: a liquid temperature detection device is installed on the output pipeline to detect the temperature of the coolant flowing out of the heat exchange outer tube.

[0012] As a further embodiment of the present invention: a baffle plate is fixedly installed inside the heat exchange outer tube, dividing the inside of the heat exchange outer tube into two interconnected spaces. The connection positions of the input pipeline and the output pipeline are both located above the baffle plate, and the pressure adaptive mechanism is located below the baffle plate.

[0013] As a further aspect of the present invention: the connection point between the input pipeline and the heat exchange outer tube is higher than the connection point between the output pipeline and the heat exchange outer tube, and the coolant inside the heat exchange outer tube flows downward along the heat exchange outer tube.

[0014] As a further aspect of the present invention: a pressure sensor is provided inside the heat exchange outer tube, and the detection end of the pressure sensor is located inside the explosion-proof junction box.

[0015] As a further aspect of the present invention: the baffle plate is configured as an annular structure with a through opening in the middle.

[0016] The beneficial effects of this invention are: 1. In this invention, the pressure adaptive mechanism comprises an adaptive cylinder, an elastic spacer, and a sealing slide. The adaptive cylinder is connected to the heat exchange inner sleeve, and an elastic spacer is provided at its end, with its concave surface increasing the deformation space. When the temperature rises, the insulating oil expands, pushing the elastic spacer to deform, causing the bottom of the concave surface to move upward, simultaneously pushing the sealing slide along the adaptive cylinder until it stops at the limiting structure, preventing excessive pressure from damaging the elastic spacer. This mechanism can ensure stable internal oil pressure when the external temperature changes drastically, effectively reducing the impact of insulating oil pressure on circuit components and extending the service life of the equipment.

[0017] 2. In this invention, the circulating heat exchange mechanism achieves coolant circulation through input and output pipelines and a delivery pump, reducing the temperature of the inner heat exchanger jacket. The flow guide baffle increases the coolant's travel distance, ensuring it flows along a predetermined path, improving heat transfer efficiency and enhancing cooling effect. The baffle plate separates the outer heat exchanger jacket, preventing the coolant's kinetic energy from affecting the elastic spacer and ensuring stable pressure sensor readings. The liquid temperature detection device monitors the output coolant temperature in real time; when the temperature is too high, it increases the pump speed to accelerate coolant circulation and improve heat dissipation efficiency. These components work together to ensure stable operation of the equipment in high-temperature environments and extend the lifespan of circuit components. Attached Figure Description

[0018] Figure 1 A schematic diagram of the overall structure of an explosion-proof oil-sealed thermal resistor provided by the present invention; Figure 2 A schematic diagram of the internal structure of the outer jacket of an explosion-proof oil-sealed resistance thermometer provided by the present invention; Figure 3 This is a schematic diagram of the second embodiment of an explosion-proof oil-sealed thermal resistor provided by the present invention; Figure 4 This invention provides a schematic diagram of a pressure adaptive mechanism for an explosion-proof oil-sealed thermal resistor.

[0019] Explanation of reference numerals in the attached figures: 1. Explosion-proof junction box; 2. Temperature measuring rod; 3. Inner heat exchanger sleeve; 4. Outer heat exchanger sleeve; 5. Circulating heat exchange mechanism; 501. Output pipeline; 502. Input pipeline; 6. Liquid temperature detection device; 7. Pressure adaptive mechanism; 701. Adaptive cylinder; 702. Elastic spacer; 703. Sealing slide; 8. Flow guide baffle; 801. Flow guide port; 9. Flow baffle; 10. Pressure sensor. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0021] like Figures 1 to 4 As shown in the figure, an explosion-proof oil-sealed resistance thermometer provided by an embodiment of the present invention includes an explosion-proof junction box 1. The explosion-proof junction box 1 contains wiring components and is filled with insulating oil. The explosion-proof junction box 1 has an explosion-proof function, completely sealing sparks, arcs, or high-temperature components inside, thereby preventing these hazardous factors from igniting explosive gases in the environment and ensuring the safe operation of the equipment in hazardous environments. A temperature measuring rod 2 is provided below the explosion-proof junction box 1, and detection circuitry is distributed inside the temperature measuring rod 2. These detection circuitry are electrically connected to the aforementioned wiring components. In the prior art, the detection circuitry can convert temperature information into electrical information, thereby completing the temperature detection task.

[0022] In this invention, a heat exchange inner sleeve 3 is fixedly installed between the explosion-proof junction box 1 and the temperature measuring rod 2, such as... Figure 2 As shown, both the explosion-proof junction box 1 and the heat exchange inner sleeve 3 are filled with insulating oil, and the wiring inside the temperature measuring rod 2 is sealed through the heat exchange inner sleeve 3. A heat exchange outer sleeve 4 is coaxially arranged around the outside of the heat exchange inner sleeve 3, and both ends of the heat exchange outer sleeve 4 are closed. A heat exchange cavity is formed between the heat exchange inner sleeve 3 and the heat exchange outer sleeve 4, which provides operating space for the heat exchange process.

[0023] As temperature rises, the insulating oil expands. Since the insulating oil fills the explosion-proof junction box 1 and the heat exchange inner bushing 3, the expanding oil will compress the circuit components. Moreover, in production environments, temperature often needs to change significantly and periodically. Prolonged exposure to such operating conditions may lead to problems such as lead wire breakage, solder joint detachment, or insulation damage, affecting the normal operation and service life of the equipment.

[0024] To address the aforementioned issues, in this embodiment, a pressure adaptive mechanism 7 is fixedly installed on the side of the heat exchange inner sleeve 3. Its function is to ensure stable internal oil pressure when the external temperature changes drastically. The pressure adaptive mechanism 7 includes an adaptive cylinder 701 fixedly installed on one side of the heat exchange inner sleeve 3, such as... Figure 4As shown. The adapting cylinder 701 is connected to the heat exchange inner sleeve 3, and an elastic spacer 702 is provided at the end of the adapting cylinder 701. The elastic spacer 702 has a concave surface to increase the deformation space of the elastic spacer 702. When the temperature rises, the volume of the insulating oil expands, and the expanding insulating oil will push the elastic spacer 702 to deform, causing the bottom of the concave surface to move upward. A sealing slide 703 is slidably fitted inside the adapting cylinder 701, which divides the internal space of the adapting cylinder 701 into two non-communicating parts. A limiting structure is provided at the top of the adapting cylinder 701, which can limit the sealing slide 703 inside the adapting cylinder 701 to prevent excessive pressure from damaging the elastic spacer 702. When the temperature of the insulating oil rises, it will push the sealing slide 703 to move along the adapting cylinder 701. The sealing slide 703 stops moving when it reaches the limiting structure at the end of the adapting cylinder 701, thus preventing excessive pressure from affecting the performance of the elastic spacer 702. This situation generally only occurs when the external temperature is too high. Through the aforementioned adaptive pressure regulation mechanism, the impact of insulating oil pressure on circuit components is effectively reduced, thereby extending the service life of the equipment.

[0025] When the ambient temperature rises, the temperature of circuit components also increases. Prolonged operation of circuit components in high-temperature environments will reduce their lifespan. Furthermore, significant temperature fluctuations accelerate the aging of insulating oil, causing changes in its viscosity and a decrease in its insulation performance, further impacting the normal operation of the equipment.

[0026] To address the aforementioned issues, a circulating heat exchange mechanism 5 is fixedly installed on the heat exchange outer tube 4. Its function is to circulate and renew the coolant inside the heat exchange chamber. The coolant can be a cooling solution containing a scale inhibitor. The circulating heat exchange mechanism 5 includes an input pipe 502 fixedly installed on one side of the heat exchange outer tube 4 and an output pipe 501 fixedly installed on the other side of the heat exchange outer tube 4. The connection point between the input pipe 502 and the heat exchange outer tube 4 is higher than the connection point between the output pipe 501 and the heat exchange outer tube 4, causing the coolant inside the heat exchange outer tube 4 to flow downwards along the heat exchange outer tube 4, allowing the coolant temperature to rise synchronously along the inner heat exchange tube 3. The coolant enters the heat exchange outer tube 4 through the input pipe 502 and exits from the heat exchange outer tube 4 through the output pipe 501. A set of delivery pumps is connected to the other end of both the input pipe 502 and the output pipe 501, maintaining the circulating flow of the coolant and achieving the cooling effect along the pipes.

[0027] In the above embodiment, by adding an external circulating cooling path, the temperature inside the heat exchange inner sleeve 3 is transferred to the output pipe 501 through coolant circulation. By increasing the contact area with the outside environment through the pipe, the temperature can be rapidly reduced to a suitable temperature, thereby reducing the heat input to the explosion-proof junction box 1, lowering the temperature of the explosion-proof junction box 1, and extending the service life of the circuit components.

[0028] Based on the above embodiments, in the second specific embodiment, multiple sets of flow-guiding baffles 8 are longitudinally distributed inside the heat exchange outer tube 4, which serve to increase the travel distance of the coolant. Each set of flow-guiding baffles 8 is annularly fitted onto the heat exchange inner tube 3, and each set of flow-guiding baffles 8 has a flow-guiding port 801 on one side to facilitate coolant flow. The flow-guiding ports 801 on adjacent flow-guiding baffles 8 are alternately distributed. This design allows the coolant to flow along a predetermined path between the heat exchange inner tube 3 and the heat exchange outer tube 4, thereby improving heat conduction efficiency and enhancing the cooling effect.

[0029] As a further improvement, a liquid temperature detection device 6 is installed on the output pipe 501. Its function is to detect the temperature of the coolant flowing out of the heat exchange outer tube 4. If the temperature is found to be too high, the operating speed of the liquid pump needs to be increased to improve the heat dissipation efficiency of the heat exchange inner tube 3 and ensure that the equipment is always in good working condition.

[0030] In one specific embodiment, a pressure sensor 10 is installed inside the heat exchange outer tube 4. The detection end of the pressure sensor 10 is located inside the explosion-proof junction box 1. Its function is to detect whether the internal pressure of the explosion-proof junction box 1 is normal, so that the circuit components can still operate within a suitable pressure range under high temperature environment, thus ensuring the stability of the equipment.

[0031] When the coolant flows, there will be a certain impact force. This impact force will cause a certain pressure effect on the elastic spacer 702, which will make the value detected by the pressure sensor 10 unstable and affect the accurate judgment of the internal pressure of the equipment.

[0032] To address the aforementioned issues, a baffle plate 9 is fixedly installed inside the heat exchanger jacket 4, dividing the interior of the jacket 4 into two interconnected spaces. The baffle plate 9 is annular with a through-hole in the center, allowing coolant to flow in and out only through this opening. The connection points of the input pipe 502 and the output pipe 501 are both located above the baffle plate 9, while the pressure adaptive mechanism 7 is located below it. This design ensures that the kinetic energy of the coolant output from the input pipe 502 has minimal impact on the elastic spacer 702, thereby guaranteeing the stability of the pressure sensor 10's readings.

[0033] Working principle: When the equipment starts operating and performs temperature detection, the detection circuit inside the temperature measuring rod 2 can sense the temperature of the surrounding environment and convert the temperature information into electrical information. This electrical information is transmitted and processed through circuit elements electrically connected to the detection circuit, thereby completing the temperature detection task.

[0034] As the ambient temperature rises or the equipment itself generates heat, the temperature of the insulating oil in the explosion-proof junction box 1 and the heat exchange inner sleeve 3 also increases, causing the insulating oil to expand. This expanding insulating oil exerts a squeezing effect on the circuit components within the explosion-proof junction box 1. Under this pressure, the insulating oil enters the adapting cylinder 701, pushing the elastic spacer 702 to deform, causing the bottom of the concave surface on the elastic spacer 702 to move upwards. As the pressure further increases, the sealing slide 703 within the adapting cylinder 701 moves along the cylinder. When the sealing slide 703 reaches the limiting structure at the end of the adapting cylinder 701, it cannot continue moving. This prevents excessive pressure from affecting the performance of the elastic spacer 702, ensuring stable internal oil pressure and reducing the impact of the insulating oil pressure on the circuit components. This situation typically occurs when the ambient temperature is too high; the pressure adaptive mechanism 7 adjusts the pressure to protect the circuit components.

[0035] The increase in ambient temperature also causes the temperature of the coolant inside the heat exchanger jacket 4 to rise. At this time, the delivery pump starts working, and the coolant enters the heat exchanger jacket 4 through the input pipe 502, and then leaves the heat exchanger jacket 4 through the output pipe 501, forming a circulation of coolant. Through this circulation, the heat in the heat exchanger inner jacket 3 is transferred to the output pipe 501 via the coolant circulation, and then the contact area with the outside is increased through the pipe, so that the temperature is rapidly reduced to a suitable temperature, thereby reducing the heat input to the explosion-proof junction box 1, lowering the temperature of the explosion-proof junction box 1, and further protecting the circuit components.

[0036] Multiple sets of flow guide baffles 8 are longitudinally distributed inside the heat exchange outer tube 4. During the flow process, the coolant flows along a predetermined path between the heat exchange inner tube 3 and the heat exchange outer tube 4, increasing the coolant's travel distance, thereby improving heat conduction efficiency, enhancing the cooling effect, and more effectively reducing the equipment temperature.

[0037] The liquid temperature detection device 6 monitors the temperature of the coolant flowing out of the heat exchange outer tube 4 in real time. If the detected temperature is too high, it indicates that the heat exchange effect is not good. At this time, the operating speed of the liquid pump will be increased to accelerate the circulation of the coolant, thereby improving the heat dissipation efficiency of the heat exchange inner tube 3 and ensuring that the equipment is always in good working condition.

[0038] Pressure sensor 10 monitors the internal pressure of explosion-proof junction box 1 in real time. In high-temperature environments, through the operation of the pressure adaptive mechanism 7 and the circulating heat exchange mechanism 5, pressure sensor 10 ensures that the circuit components can still operate within a suitable pressure range, guaranteeing equipment stability. The baffle plate 9 divides the interior of the heat exchange outer jacket 4 into two interconnected spaces in a ring shape with a through-hole in the middle, allowing coolant to flow in and out only through the through-hole. The connection points of the input pipe 502 and the output pipe 501 are both located above the baffle plate 9, while the pressure adaptive mechanism 7 is located below it. This ensures that the kinetic energy of the coolant output from the input pipe 502 has little impact on the elastic spacer 702, thus guaranteeing the stability of the pressure sensor 10's readings.

[0039] When the ambient temperature drops or the equipment stops operating, the temperature of the insulating oil in the explosion-proof junction box 1 and the heat exchange inner sleeve 3 decreases, causing it to shrink in volume. The elastic spacer 702 gradually returns to its natural state, and the sealing slide 703 also returns to its initial position.

[0040] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. An explosion-proof oil-sealed thermal resistor, comprising an explosion-proof junction box (1), wherein a temperature measuring rod (2) is disposed below the explosion-proof junction box (1), characterized in that: A heat exchange inner sleeve (3) is fixedly installed between the explosion-proof junction box (1) and the temperature measuring rod (2). Both the explosion-proof junction box (1) and the heat exchange inner sleeve (3) are filled with insulating oil. The wiring inside the temperature measuring rod (2) is sealed through the heat exchange inner sleeve (3). A heat exchange outer sleeve (4) is coaxially arranged around the outside of the heat exchange inner sleeve (3). The two ends of the heat exchange outer sleeve (4) are closed. A heat exchange cavity is formed between the heat exchange inner sleeve (3) and the heat exchange outer sleeve (4). A circulating heat exchange mechanism (5) is fixedly installed on the heat exchange outer sleeve (4) for circulating and renewing the coolant inside the heat exchange cavity. A pressure adaptive mechanism (7) is fixedly installed on the side of the heat exchange inner sleeve (3) to ensure the stability of the internal oil pressure when the external temperature changes drastically.

2. The explosion-proof oil-sealed thermal resistor as described in claim 1, characterized in that, The pressure adaptive mechanism (7) includes an adaptive cylinder (701) fixedly disposed on one side of the heat exchange inner sleeve (3). The interior of the adaptive cylinder (701) is connected to the heat exchange inner sleeve (3). An elastic spacer (702) is provided at the end of the adaptive cylinder (701). A concave surface is provided on the elastic spacer (702) to improve the deformation space of the elastic spacer. The adapting cylinder (701) has a sliding sealing slide (703) inside, which limits the sealing slide (703) inside the adapting cylinder (701) to prevent excessive pressure from damaging the elastic spacer (702). The sealing slide (703) divides the internal space of the adapting cylinder (701) into two non-communicating parts.

3. The explosion-proof oil-sealed thermal resistor as described in claim 1, characterized in that, The heat exchange outer tube (4) has multiple sets of flow guide baffles (8) distributed longitudinally inside to increase the flow path of the coolant.

4. The explosion-proof oil-sealed thermal resistor as described in claim 3, characterized in that, Each set of flow guide baffles (8) is a ring-shaped sleeve on the heat exchange inner tube (3). Each set of flow guide baffles (8) has a flow guide port (801) on one side to facilitate the passage of coolant. The flow guide ports (801) on adjacent flow guide baffles (8) are alternately distributed.

5. An explosion-proof oil-sealed thermal resistor as described in claim 2 or 4, characterized in that, The circulating heat exchange mechanism (5) includes an input pipe (502) fixedly installed on one side of the heat exchange outer tube (4) and an output pipe (501) fixedly installed on the other side of the heat exchange outer tube (4). Coolant enters the heat exchange outer tube (4) through the input pipe (502) and leaves the heat exchange outer tube (4) through the output pipe (501). A set of delivery pumps is connected to the other end of both the input pipe (502) and the output pipe (501).

6. The explosion-proof oil-sealed thermal resistor as described in claim 5, characterized in that, A liquid temperature detection device (6) is installed on the output pipeline (501) to detect the temperature of the coolant flowing out of the heat exchange outer tube (4).

7. The explosion-proof oil-sealed thermal resistor as described in claim 6, characterized in that, The heat exchange outer tube (4) is fixedly provided with a baffle plate (9), which divides the interior of the heat exchange outer tube (4) into two interconnected spaces. The connection positions of the input pipe (502) and the output pipe (501) are both located above the baffle plate (9), and the pressure adaptive mechanism (7) is located below the baffle plate (9).

8. The explosion-proof oil-sealed thermal resistor as described in claim 5, characterized in that, The connection point between the input pipe (502) and the heat exchange outer tube (4) is higher than the connection point between the output pipe (501) and the heat exchange outer tube (4), and the coolant inside the heat exchange outer tube (4) flows downward along the heat exchange outer tube (4).

9. The explosion-proof oil-sealed thermal resistor as described in claim 5, characterized in that, A pressure sensor (10) is installed inside the heat exchange outer tube (4), and the detection end of the pressure sensor (10) is located inside the explosion-proof junction box (1).

10. The explosion-proof oil-sealed thermal resistor as described in claim 7, characterized in that, The baffle plate (9) is configured as an annular structure with a through opening in the middle.

Images