Self-cleaning commutating valve

Abstract

This utility model belongs to the field of directional valve technology and relates to a self-cleaning directional valve, including a valve body, a valve core, a first sealing assembly, a high-pressure airflow assembly, and a second sealing assembly. The valve body has a first conveying channel and a second conveying channel. The valve core is rotatably disposed inside the valve body to switch between the first and second conveying channels. The first sealing assembly includes a sealing groove and a valve core sealing ring that fits within the sealing groove. The high-pressure airflow assembly is disposed at the first sealing assembly and is used to spray air into the inlet and outlet ends of the valve core material channel to form a high-pressure sealing air curtain, preventing dust from entering the valve cavity between the valve core and the valve body. The second sealing assembly includes a sealing ring that is sealingly connected between the valve core rotation shaft and the end plate. This utility model can realize continuous feeding of bulk solid materials, improve the reliability and stability of valve operation, and reduce abnormal phenomena such as leakage and jamming during the material conveying process.

Description

Technical Field

[0001] This utility model belongs to the field of directional valve technology, specifically relating to a self-cleaning directional valve. Background Technology

[0002] A directional valve is a widely used device for storing and conveying bulk solid materials such as powders and granules. It can achieve stable and continuous material conveying by controlling the rotation position of a cylinder and a solenoid valve according to a set rotation position.

[0003] In industrial production, there are many areas requiring accurate conveying and control of bulk solid materials. Directional control valves are widely used in various industries, including metallurgy, chemicals, food, and grain. In the chemical industry, a typical example is their use in the batching, mixing, and metering of chemical raw materials, catalysts, and additives. Due to their wide range of applications, improving the high-pressure sealing performance, self-cleaning properties, and reliability of directional control valves is of significant practical importance.

[0004] The current traditional sealing method involves creating grooves on both sides of the material passage of the directional valve core, each containing two silicone airbags, and shaft seals on the end plate and valve shaft. This sealing method suffers from several drawbacks when the conveying pressure exceeds 1 bar. These drawbacks include the inability to self-clean solid dust within the pipeline, leakage of solid dust during directional switching, complex control and operation of the sealing airbags, high resistance in the valve core sealing ring, long switching time, and the need for increased cylinder torque. Therefore, there is an urgent need to develop and design a self-cleaning directional valve. Utility Model Content

[0005] The purpose of this invention is to address the defects and shortcomings in the existing technology by designing a self-cleaning reversing valve.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a self-cleaning reversing valve, comprising:

[0007] The valve body has a first conveying channel and a second conveying channel;

[0008] The valve core is rotatably disposed inside the valve body. By rotating the valve core, the switching between the first conveying channel and the second conveying channel can be realized.

[0009] The first sealing assembly includes sealing grooves respectively disposed at the inlet end and outlet end of the valve core material channel, and a valve core sealing ring disposed in the sealing groove.

[0010] A high-pressure airflow assembly is provided at the first sealing assembly and is used to spray air into the inlet and outlet ends of the valve core material channel to form a high-pressure sealing air curtain, preventing dust materials from entering the valve cavity between the valve core and the valve body.

[0011] The second sealing assembly includes a sealing ring that is sealingly connected between the valve core rotating shaft and the end plate.

[0012] Preferably, the sealing grooves are distributed along the circumferential direction of the inlet and outlet ends of the valve core material channel, respectively, and a high-pressure air source inlet is provided at the bottom of the sealing groove, and an air jet hole communicating with the inside of the material channel is provided on the inner wall.

[0013] Preferably, the diameter of the high-pressure gas source inlet is 5-13 mm and the number is 1-5, and the diameter of the jet holes is 1-5 mm and the number is 13-199.

[0014] Preferably, the valve core sealing ring is made of rubber and has a "π" shaped cross-section.

[0015] Preferably, the valve core sealing ring is provided with an air inlet that communicates with the high-pressure air source inlet and an airflow channel that communicates with the jet hole.

[0016] Preferably, the sealing ring has an "M" shaped cross-section, with 1-3 first sealing rings between its top and the end plate, and between its bottom and the valve core rotation shaft.

[0017] Preferably, a second sealing ring is provided between the end plate and the valve body.

[0018] Preferably, the valve body is further provided with a solenoid valve and an actuator.

[0019] After adopting the above technical solution, the self-cleaning reversing valve provided by this utility model has the following beneficial effects:

[0020] This invention enables continuous and stable feeding of bulk solid materials under high-pressure conveying conditions, improving the reliability and stability of valve operation and reducing abnormal phenomena such as leakage and jamming during material conveying. Simultaneously, this invention has a reliable self-cleaning function, allowing for smooth switching of the pipeline's material conveying direction, transporting bulk solid materials to designated areas for use by downstream silos or packaging systems, thus meeting the requirements for safe, efficient, stable, and reliable solid material conveying. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a self-cleaning reversing valve according to the present invention;

[0022] Figure 2 for Figure 1 Structural sectional view;

[0023] Figure 3 This is a schematic diagram of the valve core structure in this utility model;

[0024] Figure 4 for Figure 3 The main view;

[0025] Figure 5 for Figure 4 Enlarged schematic diagram of the structure at the middle V section;

[0026] Figure 6 This is a schematic diagram of the valve core sealing ring in this utility model;

[0027] Figure 7 This is a schematic diagram of the sealing ring structure in this utility model;

[0028] Figure 8 This is a schematic diagram of the cross-sectional structure of the sealing ring in this utility model;

[0029] Figure 9 This is a schematic diagram of the connection structure between the middle end plate and the valve body of this utility model.

[0030] The components include: valve body 1, valve core 2, sealing groove 201, high-pressure air source inlet 202, air jet hole 203, valve core sealing ring 3, end plate 4, sealing ring 5, second sealing ring 6, solenoid valve 7, and actuator 8. Detailed Implementation

[0031] The present invention will now be described in further clear and complete detail with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0034] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0035] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0036] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0037] This utility model discloses a self-cleaning reversing valve, such as Figure 1-9 As shown, the device includes a valve body 1 and a valve core 2 rotatably disposed inside the valve body 1. The valve body 1 has a first conveying channel and a second conveying channel. The valve core 2 can rotate under the action of the actuator 8, thereby realizing the switching between the first conveying channel and the second conveying channel. During operation, the first conveying channel or the second conveying channel is selected. Bulk solid materials are transported from the upstream silo to the inlet of the valve body 1 through the pipeline. Driven by the high-pressure and high-speed airflow, they pass through the valve core 2 and enter the outlet of the valve body 1, and then enter the downstream conveying pipeline, forming a continuous and complete conveying process.

[0038] The valve core 2 has a material channel connecting the inlet and outlet of the valve body 1. Both the inlet and outlet ends of the material channel are provided with a first sealing assembly. The first sealing assembly includes a sealing groove 201 and a valve core sealing ring 3 fitted within the sealing groove 201. A high-pressure airflow assembly is also provided at the first sealing assembly. This high-pressure airflow assembly is used to spray air into the inlet and outlet ends of the material channel of the valve core 2 to form a high-pressure sealing air curtain, preventing dust from entering the valve cavity between the valve core 2 and the valve body 1, thus achieving a self-cleaning function. Specifically, the sealing grooves 201 are distributed along the circumference of the inlet and outlet ends of the material channel of the valve core 2. A high-pressure air source inlet 202 is provided at the bottom of the sealing groove 201, and an air jet hole 203 communicating with the interior of the material channel is provided on the inner wall. The diameter of the compressed air source inlet 202 is 5-13mm, and the number is 1-5. The diameter of the jet holes 203 is 1-5mm, and the number is 13-199. The valve core sealing ring 3 is made of wear-resistant and stable rubber material, and the cross-section is designed in a "π" shape, that is, it has multiple freely bendable sealing strips at the bottom. The valve core sealing ring 3 is provided with an air inlet hole communicating with the high-pressure air source inlet 202 and an airflow channel communicating with the jet holes 203. Under the control of the solenoid valve 7, the high-pressure air source enters the jet hole 203 from the high-pressure air source inlet 202 along the airflow channel. Under the action of the air curtain of the valve core sealing ring 3, a self-cleaning high-pressure airflow with sealing function is formed. At the same time, through the design of the freely bendable sealing strip, the high-pressure gas flow can be isolated in one direction to form back pressure.

[0039] Sealing rings 5 ​​are also fitted on the two rotating shafts of the valve core 2. The sealing rings 5 ​​are sealed between the rotating shaft of the valve core 2 and the end plate 4. Specifically, the sealing ring 5 has an "M" shaped cross section. There are 1-3 first sealing rings between its top and the end plate 4, and between its bottom and the rotating shaft of the valve core 2. This design can achieve a double sealing effect in the axial and radial directions, preventing the leakage of compressed gas and dust materials inside the valve body 1 cavity to the outside, and ensuring that the reversing valve maintains stable operation in actual work.

[0040] A second sealing ring 6 is also provided between the end plate 4 and the valve body 1. Specifically, there are bevels on both sides of the cavity hole of the valve body 1. The sealing ring 6 is located in the cavity formed by these bevels. After the end plate 4 and the valve body 1 are installed, the sealing ring 6 installed in the bevel cavity provides axial and radial sealing for the valve body 1 and the end plate 4. At the same time, in the confined bevel space, after the sealing ring 6 is subjected to the installation extrusion force, it will form a thick L-shape, which can expand the sealing surface area and effectively improve the sealing effect of the end plate 4.

[0041] When using the self-cleaning reversing valve of this utility model, before the conveying system is in operation, high-pressure gas is injected into the airflow channel of the valve core sealing ring 3 through the solenoid valve 7. The gas pressure in the valve core sealing ring 3 is about 0.5-1 bar higher than the airflow pressure in the conveying channel. When it is necessary to switch the valve core 2 channel of the reversing valve, the solenoid valve 7 needs to be closed first to disconnect the gas source, and the gas in the valve core sealing ring 3 can be directly vented.

[0042] In summary, the self-cleaning directional valve provided by this utility model achieves the requirements of safe, efficient, stable and reliable conveying of bulk solid materials. It enables continuous feeding of bulk solid materials, improves the reliability and stability of valve operation, reduces abnormal phenomena such as leakage and jamming during the material conveying process, and allows bulk solid materials to be continuously conveyed to designated areas for use by downstream equipment.

[0043] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A self-cleaning directional valve, characterized in that, include: Valve body (1), the valve body (1) having a first conveying channel and a second conveying channel; The valve core (2) is rotatably disposed inside the valve body (1). By rotating the valve core (2), the switching between the first conveying channel and the second conveying channel can be realized. The first sealing assembly includes a sealing groove (201) respectively disposed at the inlet end and outlet end of the material channel of the valve core (2), and a valve core sealing ring (3) disposed in the sealing groove (201); High-pressure airflow assembly, which is located at the first sealing assembly, is used to spray air into the inlet and outlet of the material channel of the valve core (2) to form a high-pressure sealing air curtain, preventing dust materials from entering the valve cavity between the valve core (2) and the valve body (1); The second sealing assembly includes a sealing ring (5) which is sealed between the rotating shaft of the valve core (2) and the end plate (4).

2. The self-cleaning directional valve according to claim 1, characterized in that: The sealing grooves (201) are distributed along the circumferential direction of the inlet and outlet of the material channel of the valve core (2). The bottom of the sealing groove (201) is provided with a high-pressure air source inlet (202), and the inner wall is provided with an air jet hole (203) that communicates with the inside of the material channel.

3. The self-cleaning directional valve according to claim 2, characterized in that: The high-pressure gas source inlet (202) has a diameter of 5-13 mm and a quantity of 1-5, and the jet nozzle (203) has a diameter of 1-5 mm and a quantity of 13-199.

4. The self-cleaning directional valve according to claim 1, characterized in that: The valve core sealing ring (3) is made of rubber and has a "π" shaped cross section.

5. A self-cleaning directional valve according to claim 2, characterized in that: The valve core sealing ring (3) is provided with an air inlet that communicates with the high-pressure air source inlet (202) and an airflow channel that communicates with the jet hole (203).

6. A self-cleaning directional valve according to claim 1, characterized in that: The sealing ring (5) has an "M" shaped cross section, with 1-3 first sealing rings between its top and the end plate (4) and between its bottom and the rotating shaft of the valve core (2).

7. A self-cleaning directional valve according to claim 1, characterized in that: A second sealing ring (6) is also provided between the end plate (4) and the valve body (1).

8. A self-cleaning directional valve according to claim 1, characterized in that: The valve body (1) is also equipped with a solenoid valve (7) and an actuator (8).

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