A dryer pressure relief device and control system

Abstract

The utility model relates to dry equipment technical field discloses a kind of dryer pressure relief device and control system, the dryer pressure relief device includes dryer main body and pressure relief pipeline, pressure relief pipeline is equipped with pressure valve, electromagnetic pressure relief valve and pressure sensor, pressure valve is automatically opened when the air pressure in pipeline reaches first pressure threshold value Pressure relief, electromagnetic pressure relief valve is controlled to open when air pressure reaches higher second pressure threshold value Pressure relief. The application is realized by setting pressure valve and electromagnetic pressure relief valve, and multiple pressure relief is realized. When smaller pressure anomaly occurs, reaches first pressure threshold value, pressure valve is automatically opened Pressure relief, can timely alleviate slight pressure rise situation, avoid pressure continuous accumulation. When pressure anomaly is more serious, reaches second pressure threshold value, electromagnetic pressure relief valve opens, increases pressure relief degree, can effectively cope with serious pressure too high problem.

Description

Technical Field

[0001] This utility model relates to the field of dryer equipment technology, specifically to a dryer pressure relief device and control system. Background Technology

[0002] Dryers are widely used in industrial production and daily life, covering many fields such as food processing, chemicals, pharmaceuticals, and textiles. Their main function is to remove moisture from materials through heating and ventilation to achieve the purpose of drying, facilitating storage, processing, or use. However, during operation, the internal pressure of a dryer can become unstable due to various factors. For example, during the drying process, as heating proceeds, the air and water vapor in the drying chamber expand due to heat, leading to an increase in pressure; or when the ventilation system malfunctions, such as blocked ducts or fan failure, the gas in the drying chamber cannot be discharged normally, causing a sharp rise in pressure. Excessive pressure poses a serious threat to the safe operation of the dryer. On the one hand, continuous high pressure may damage the structural components of the dryer, such as deformation of the drying chamber walls and cracking of seals, reducing the dryer's service life and increasing maintenance costs; on the other hand, when the pressure exceeds the dryer's tolerance limit, it may even cause serious safety accidents such as explosions, endangering the lives of operators and the stability of the production environment.

[0003] Traditional pressure relief devices often have a single function, relying on only a single pressure release mechanism, making it difficult to adapt to different levels of pressure anomalies. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model aims to provide a pressure relief device and control system for a dryer, thereby resolving the technical problem that existing pressure relief devices are unable to adapt to different degrees of pressure anomalies.

[0005] To solve the above-mentioned technical problems, in a first aspect, this utility model provides a pressure relief device for a dryer, the device comprising:

[0006] The dryer body includes a drying chamber, a drying rack inside the drying chamber, and an air inlet and outlet communicating with the drying chamber.

[0007] A pressure relief pipeline is provided with a pressure valve and an electromagnetic pressure relief valve, and a pressure sensor is provided inside the pressure relief pipeline. The pressure valve is configured to automatically open to relieve pressure when the air pressure in the pressure relief pipeline is greater than or equal to a first pressure threshold. The electromagnetic pressure relief valve is configured to open to relieve pressure when the air pressure in the pressure relief pipeline is greater than or equal to a second pressure threshold, wherein the second pressure threshold is greater than the first pressure threshold.

[0008] Furthermore, in the direction of the drying airflow, the air inlet is located below the drying rack, and the air outlet is located above the drying rack.

[0009] Furthermore, the pressure valve includes a valve body, a connector detachably connected to one side of the valve body, and a valve core assembly disposed inside the valve body. The valve core assembly includes a push rod and a spring sleeved on the outside of the push rod. The connector has a first opening and a second opening. The valve body has an air chamber inside and a pressure relief hole communicating with the air chamber on its outer wall. One end of the push rod has a sealing part, which has the state of opening or closing the second opening.

[0010] Furthermore, the edge of the sealing part is provided with multiple through holes. When the sealing part is in the state of opening the second opening, the first opening, the second opening, the air chamber and the pressure relief hole are connected in sequence.

[0011] Furthermore, the pressure valve also includes a first adjusting component, which includes an inner adjusting component and an outer adjusting component. The inner adjusting component is threadedly connected inside the valve body and abuts against one end of the spring. The outer adjusting component is threadedly connected outside the valve body and abuts against one end of the inner adjusting component.

[0012] Furthermore, one end of the push rod passes through the inner adjusting member and the outer adjusting member, and extends to the outside of the outer adjusting member. The pressure valve also includes a second adjusting assembly, which includes an adjusting handle connected to one end of the push rod.

[0013] Furthermore, the internal adjustment element is configured to adjust the initial elastic force of the spring to adjust the pressure relief threshold.

[0014] Secondly, this utility model also provides a dryer pressure relief control system, including the dryer pressure relief device and controller as described in the first aspect, wherein the controller is used to control the electromagnetic pressure relief valve to open for pressure relief when the air pressure in the pressure relief pipeline is greater than or equal to a second pressure threshold.

[0015] Compared to existing technologies, the advantages of this utility model are as follows: The dryer pressure relief device of this application includes a dryer body and a pressure relief pipe. The dryer body contains a drying chamber and a drying rack for placing objects to be dried, as well as an air inlet and an air outlet connecting the drying chamber. The pressure relief pipe is equipped with a pressure valve, an electromagnetic pressure relief valve, and a pressure sensor. The pressure valve automatically opens to relieve pressure when the air pressure in the pipe reaches a first pressure threshold, and the electromagnetic pressure relief valve is controlled to open to relieve pressure when the air pressure reaches a higher second pressure threshold. This application achieves multi-stage pressure relief by setting up a pressure valve and an electromagnetic pressure relief valve. When a minor pressure anomaly occurs and reaches the first pressure threshold, the pressure valve automatically opens to relieve pressure, which can promptly alleviate a slight pressure rise and prevent continuous pressure accumulation. When the pressure anomaly becomes more severe and reaches the second pressure threshold, the electromagnetic pressure relief valve opens to increase the pressure relief intensity, which can effectively deal with severe overpressure problems, greatly reducing the risk of the dryer being damaged or even exploding due to excessive pressure, and ensuring the safety of equipment and personnel. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the dryer pressure relief control system in one embodiment of this application;

[0017] Figure 2 This is a perspective view of a pressure valve in one embodiment of this application;

[0018] Figure 3 This is a cross-sectional schematic diagram of a pressure valve in another embodiment of this application.

[0019] In the attached diagram, the dryer body is 100, the drying chamber is 110, the drying rack is 111, the air inlet is 112, the air outlet is 113, the pressure relief pipe is 200, the pressure valve is 210, the valve body is 211, the air chamber is 2111, the pressure relief hole is 2112, the connector is 212, the first opening is 2121, the second opening is 2122, the push rod is 213, the sealing part is 2131, the spring is 214, the internal adjusting part is 215, the external adjusting part is 216, the adjusting handle is 217, the electromagnetic pressure relief valve is 220, and the pressure sensor is 230. Detailed Implementation

[0020] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integrated connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Please see the appendix Figure 1-3 This utility model provides a pressure relief device for a dryer, which includes a dryer body 100 and a pressure relief pipe 200. The dryer body 100 is provided with a drying chamber 110, and a drying rack 111 is provided in the drying chamber 110. The drying rack 111 is configured to place objects to be dried. The dryer body 100 is provided with an air inlet 112 and an air outlet 113 communicating with the drying chamber 110.

[0024] The pressure relief pipe 200 is equipped with a pressure valve 210 and an electromagnetic pressure relief valve 220, and a pressure sensor 230 is installed inside the pressure relief pipe 200. The pressure valve 210 is configured to automatically open to relieve pressure when the air pressure in the pressure relief pipe 200 is greater than or equal to a first pressure threshold. The electromagnetic pressure relief valve 220 is configured to open to relieve pressure when the air pressure in the pressure relief pipe 200 is greater than or equal to a second pressure threshold, wherein the second pressure threshold is greater than the first pressure threshold.

[0025] In one embodiment, to ensure the drying effect, the air inlet 112 is located below the drying rack 111 and the air outlet 113 is located above the drying rack 111 in the direction of airflow. This arrangement allows the hot airflow to enter the drying chamber from below, ensuring full contact with the object to be dried. After evaporating the moisture in the object, the water vapor is discharged upward with the airflow from the air outlet, improving drying efficiency and drying quality.

[0026] like Figure 2-3As shown, in one embodiment, the pressure valve 210 includes a valve body 211, a connector 212 detachably connected to one side of the valve body 211, and a valve core assembly disposed inside the valve body 211. The valve core assembly includes a push rod 213 and a spring 214 sleeved on the outside of the push rod 213. The connector 212 has a first opening 2121 and a second opening 2122. The valve body 211 has an air chamber 2111 inside and a pressure relief hole 2112 communicating with the air chamber 2111 on its outer wall. One end of the push rod 213 has a sealing part 2131, which has the state of opening or closing the second opening 2122. The size of the sealing part 2131 is larger than the size of the second opening 2122 so as to completely seal the second opening 2122.

[0027] The outer or inner wall of the first opening 2121 is provided with a thread for connection to the pressure relief pipe 200, so that the pressure valve 210 is connected to the pressure relief pipe 200 through the first opening 2121.

[0028] In one embodiment, the edge of the sealing portion 2131 is provided with a plurality of evenly spaced through holes (not shown). When the sealing portion 2131 is in the state of opening the second opening 2122, the first opening 2121, the second opening 2122, the air chamber 2111, and the pressure relief hole 2112 are connected in sequence. At this time, the high-pressure gas in the pressure relief pipe 200 can be discharged through these channels in sequence, realizing the pressure relief function.

[0029] To adjust the pressure relief threshold of the pressure valve, the pressure valve 210 of this application further includes a first adjusting assembly, which includes an inner adjusting member 215 and an outer adjusting member 216. The inner adjusting member 215 is threadedly connected inside the valve body 211 and abuts against one end of the spring 214. The outer adjusting member 216 is threadedly connected outside the valve body 211 and abuts against one end of the inner adjusting member 215. The inner adjusting member 215 is configured to adjust the initial elastic force of the spring 214 to adjust the pressure relief threshold. When the inner adjusting member 215 is screwed inward into the valve body 211, the spring 214 is compressed significantly, requiring greater air pressure to push the push rod 213 to open the second opening 2122 of the sealing part 2131, resulting in a higher pressure relief threshold. Conversely, when the inner adjusting member 215 is screwed outward from the valve body 211, the spring 214 is uncompressed or slightly compressed, requiring less air pressure to push the push rod 213, resulting in a lower pressure relief threshold. Thus, the pressure relief threshold can be adjusted by regulating the depth of the internal adjustment component entering the valve body 211 to adapt to different working scenarios and pressure requirements.

[0030] In another embodiment, one end of the push rod 213 passes through the inner adjusting member 215 and the outer adjusting member 216, and extends to the outside of the outer adjusting member 216. Furthermore, the pressure valve 210 also includes a second adjusting assembly, which includes an adjusting handle 217 connected to one end of the push rod 213. In some special cases, such as when the pressure sensor 230 malfunctions and cannot accurately monitor the pressure, or when emergency manual pressure relief is required, the operator can manually pull the adjusting handle 217 to directly push the push rod 213, causing the sealing part 2131 to open the second opening 2122 for manual pressure relief.

[0031] In another embodiment of this application, a controller 300 can be configured to form a dryer pressure relief control system with the dryer pressure relief device. The controller 300 controls the electromagnetic pressure relief valve 220 to open for pressure relief when the air pressure in the pressure relief pipe 200 is greater than or equal to a second pressure threshold. The controller 300 is communicatively connected to the pressure sensor 230 and receives real-time air pressure data in the pressure relief pipe 200 from the pressure sensor 230. When the air pressure reaches the first pressure threshold, the pressure valve 210 automatically opens for initial pressure relief. When the air pressure continues to rise and reaches the second pressure threshold, the controller 300, upon receiving a signal from the pressure sensor 230, immediately issues a control command to open the electromagnetic pressure relief valve 220, increasing the pressure relief intensity and ensuring that the pressure inside the dryer is rapidly reduced to a safe range.

[0032] The dryer pressure relief control system of this application automatically opens the pressure valve to relieve pressure when a minor pressure abnormality occurs in the pressure relief pipeline 200 and reaches the first pressure threshold. This can promptly alleviate the slight pressure rise and prevent the pressure from accumulating. When the pressure abnormality in the pressure relief pipeline 200 becomes more severe and reaches the second pressure threshold, it indicates that the pressure valve cannot meet the pressure relief requirements or that the pressure valve has malfunctioned. At this time, the electromagnetic pressure relief valve is opened to increase the pressure relief level. This can effectively deal with serious overpressure problems, greatly reduce the risk of the dryer being damaged or even exploding due to excessive pressure, and ensure the safety of equipment and personnel.

[0033] Obviously, the above are only preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the contents of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A pressure relief device for a dryer, characterized in that, The device includes: The dryer body (100) has a drying chamber (110) inside, and a drying rack (111) inside the drying chamber (110) is configured to place objects to be dried; the dryer body (100) has an air inlet (112) and an air outlet (113) communicating with the drying chamber (110). A pressure relief pipe (200) is provided with a pressure valve (210) and an electromagnetic pressure relief valve (220), and a pressure sensor (230) is provided inside the pressure relief pipe (200). The pressure valve (210) is configured to automatically open to relieve pressure when the air pressure in the pressure relief pipe (200) is greater than or equal to a first pressure threshold. The electromagnetic pressure relief valve (220) is configured to open to relieve pressure when the air pressure in the pressure relief pipe (200) is greater than or equal to a second pressure threshold, wherein the second pressure threshold is greater than the first pressure threshold.

2. The dryer pressure relief device as described in claim 1, characterized in that, In the direction of the flow of the drying airflow, the air inlet (112) is located below the drying rack (111), and the air outlet (113) is located above the drying rack (111).

3. The dryer pressure relief device as described in claim 1, characterized in that, The pressure valve (210) includes a valve body (211), a connector (212) detachably connected to one side of the valve body (211), and a valve core assembly located inside the valve body (211). The valve core assembly includes a push rod (213) and a spring (214) sleeved on the outside of the push rod (213). The connector (212) has a first opening (2121) and a second opening (2122). The valve body (211) has an air chamber (2111) inside and a pressure relief hole (2112) communicating with the air chamber (2111) on its outer wall. One end of the push rod (213) has a sealing part (2131), which has the state of opening or closing the second opening (2122).

4. The dryer pressure relief device as described in claim 3, characterized in that, The edge of the sealing part (2131) is provided with multiple through holes. When the sealing part (2131) is in the state of opening the second opening (2122), the first opening (2121), the second opening (2122), the air chamber (2111) and the pressure relief hole (2112) are connected in sequence.

5. The dryer pressure relief device as described in claim 3, characterized in that, The pressure valve (210) further includes a first adjusting component, which includes an inner adjusting component (215) and an outer adjusting component (216). The inner adjusting component (215) is threadedly connected to the inside of the valve body (211) and abuts against one end of the spring (214). The outer adjusting component (216) is threadedly connected to the outside of the valve body (211) and abuts against one end of the inner adjusting component (215).

6. The dryer pressure relief device as described in claim 5, characterized in that, One end of the push rod (213) passes through the inner adjusting member (215) and the outer adjusting member (216) and extends to the outside of the outer adjusting member (216). The pressure valve (210) also includes a second adjusting assembly, which includes an adjusting handle (217) connected to one end of the push rod (213).

7. The dryer pressure relief device as described in claim 5, characterized in that, The internal adjustment element (215) is configured to adjust the initial elastic force of the spring (214) to adjust the pressure relief threshold.

8. A pressure relief control system for a dryer, characterized in that, Includes a dryer pressure relief device as described in any one of claims 1-7 and a controller (300), wherein the controller (300) is used to control the electromagnetic pressure relief valve (220) to open for pressure relief when the air pressure in the pressure relief pipe (200) is greater than or equal to a second pressure threshold.

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