Vehicle-mounted stop valve, protection mechanism and working method

Abstract

This invention belongs to the field of gate valve technology, specifically relating to a vehicle-mounted gate valve, a protective mechanism, and a working method. The vehicle-mounted gate valve includes: a valve body with an internal flow port connecting an air inlet and an exhaust port on both sides of the valve body; an opening / closing mechanism disposed inside the valve body, wherein a valve core in the opening / closing mechanism is adapted to block the flow port when moving downwards; and a protective mechanism disposed inside the valve body, including a protective sleeve and a valve core protection assembly. The valve core protection assembly is connected to the upper end of the valve core and is arranged around the outer wall of the valve core, so that after the valve core moves upwards into the protective sleeve, the valve core protection assembly retracts to cover the outer wall of the valve core. By providing the opening / closing mechanism and the protective mechanism, during the up-and-down movement of the opening / closing mechanism, the valve core protection assembly in the protective mechanism moves. When the valve core in the opening / closing mechanism moves upwards, the valve core protection assembly on the outer wall of the valve core covers and protects it from corrosive gases.

Description

Technical Field

[0001] This invention belongs to the field of gate valve technology, specifically relating to a vehicle-mounted gate valve, a protective mechanism, and a working method. Background Technology

[0002] In coastal or high-humidity, high-salinity environments, the air is rich in salt spray, moisture, and potentially other corrosive particles. When this external airflow is drawn in or comes into contact with the gate valve through related systems, the corrosive components it contains adhere to the valve core surface. Under alternating temperature and humidity changes, these components initiate and accelerate electrochemical corrosion and pitting of the metal valve core, damaging the surface finish and material integrity. Long-term effects will cause corrosion damage to the valve core sealing surface, decreased dimensional accuracy, and significantly shorten the service life of the gate valve.

[0003] Existing technologies typically employ filtration, labyrinth structures, or buffer chambers along the path of contact with outside air to attempt to intercept or reduce the direct impact of corrosive particles and salt spray on the valve core. However, the isolation design in these measures increases the complexity and size of the valve structure.

[0004] Therefore, a vehicle-mounted shut-off valve, protective mechanism, and working method are designed to solve the technical problems of increased valve structure complexity and valve volume caused by the use of buffer chambers to isolate corrosive particles and salt spray from direct impact on the valve core in existing technologies.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Summary of the Invention

[0006] This disclosure provides at least one vehicle-mounted shut-off valve, a protective mechanism, and a working method.

[0007] In a first aspect, embodiments of this disclosure provide a vehicle-mounted shut-off valve, comprising: The valve body has an internal flow port to connect the air inlet and exhaust ports on both sides of the valve body; An opening and closing mechanism is disposed inside the valve body, and the valve core in the opening and closing mechanism is adapted to block the flow port when it moves downward; and The protective mechanism is located inside the valve body and includes a protective sleeve and a valve core protection assembly; wherein The valve core protection component is connected to the upper end of the valve core and is arranged around the outer wall of the valve core so that after the valve core moves up into the protective sleeve, the valve core protection component closes and covers the outer wall of the valve core.

[0008] In one optional implementation, the protective mechanism includes: The protective mechanism includes: A retractable ring is provided on the lower end face of the protective sleeve; wherein The inner wall of the retractable ring is adapted to abut against the outer wall of the valve core protection assembly when the valve core slides upward, so that the valve core protection assembly covers the outer wall of the valve core.

[0009] In one optional embodiment, the valve body has a flow chamber inside, and the inner wall of the flow chamber has an annular clearance groove; wherein The valve core protection assembly is adapted to be inserted into the annular clearance groove when the valve core moves down to block the air inlet.

[0010] In one optional implementation, the valve core protection assembly includes: Several protective plates are arranged circumferentially in a trumpet shape around the axis of the valve core on the outer wall of the valve core; The top of each of the protective plates is connected to the valve core; wherein The outer wall of each of the aforementioned protective plates is adapted to abut against the inner wall of the retracting ring when the valve core slides upward, thereby retracting into the protective sleeve to cover the outer wall of the valve core; and The bottom end of each of the protective plates is adapted to be inserted into the annular clearance groove when the valve core moves down to block the air inlet.

[0011] In one optional implementation, the opening and closing mechanism includes: A blocking piston is located at the bottom of the valve core; wherein The blocking piston is adapted to block the air inlet when the valve core moves downward.

[0012] In one optional embodiment, the outer wall of the valve core is provided with threads; A connecting sleeve is provided on the outer wall of the valve body; wherein The valve core passes through the connecting sleeve, and the valve core is threadedly engaged with the connecting sleeve.

[0013] Secondly, this disclosure also provides a protective mechanism for a vehicle-mounted shut-off valve, comprising: A protective sleeve extends vertically through the top of the valve body, and the valve core passes through the protective sleeve. A retractable ring is provided on the lower end face of the protective sleeve; wherein The inner wall of the retractable ring is adapted to abut against the outer wall of the valve core protection assembly when the valve core slides upward, so that the valve core protection assembly covers the outer wall of the valve core.

[0014] In one optional embodiment, the valve body has a flow chamber inside, and the inner wall of the flow chamber has an annular clearance groove; wherein The valve core protection assembly is adapted to be inserted into the annular clearance groove when the valve core moves down to block the air inlet.

[0015] In one optional implementation, the valve core protection assembly includes: Several protective plates are arranged circumferentially in a trumpet shape around the axis of the valve core on the outer wall of the valve core; The top of each of the protective plates is connected to the valve core; wherein The outer wall of each of the aforementioned protective plates is adapted to abut against the inner wall of the retracting ring when the valve core slides upward, thereby retracting into the protective sleeve to cover the outer wall of the valve core; and The bottom end of each of the protective plates is adapted to be inserted into the annular clearance groove when the valve core moves down to block the air inlet.

[0016] Thirdly, this disclosure also provides a method for operating a vehicle-mounted shut-off valve, the method comprising: By rotating the valve core in the forward direction, it moves downward along the axis of the protective sleeve, causing the sealing piston at the bottom of the valve core to move downward to block the flow port; By rotating the valve core in the opposite direction, it moves upward along the axis of the protective sleeve. By abutting against the inner wall of the retracting ring, each protective plate retracts into the protective sleeve to cover the outer wall of the valve core, thereby preventing the airflow from eroding the outer wall of the valve core.

[0017] The beneficial effect of this invention is that the vehicle-mounted shut-off valve is equipped with an opening and closing mechanism and a protective mechanism. During the up and down movement of the opening and closing mechanism, the valve core protection component in the protective mechanism moves synchronously. When the valve core in the opening and closing mechanism moves upward, the valve core protection component set on the outer wall of the valve core retracts and follows the valve core into the protective sleeve. While venting the air inside the protective sleeve, it covers the outer wall of the valve core to protect it and prevent corrosion from corrosive gases.

[0018] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1This is a schematic diagram of the internal cross-sectional structure of the valve body provided in an embodiment of this disclosure; Figure 2 This is a front view structural diagram of the valve core protection assembly provided in the embodiments of this disclosure.

[0022] In the picture: 1. Valve body; 10. Air inlet; 11. Air outlet; 12. Flow port; 13. Connecting sleeve; 14. Flow chamber; 2. Opening and closing mechanism; 21. Valve core; 22. Sealing piston; 3. Protective mechanism; 30. Protective sleeve; 31. Valve core protection assembly; 310. Protective plate; 32. Retracting ring; 33. Annular clearance groove. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0025] In this document, when an element or layer is referred to as “located,” “joined to,” “connected to,” “attached to,” or “coupled to” another element or layer, it may be directly located, joined, connected, attached to, or coupled to the other element or layer, or there may be intermediate elements or layers present. Conversely, when an element is referred to as “directly on another element or layer,” “directly joined to,” “directly connected to,” “directly attached to,” or “directly coupled to” another element or layer, there may be no intermediate elements or layers present. Other terms used to describe relationships between elements should be interpreted in a similar manner (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). As used herein, the term “and / or” includes any and all combinations of one or more of the related listed items.

[0026] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0027] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0028] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0029] Research has found that existing technologies generally employ filtration, labyrinth structures, or buffer chambers along the path of contact with outside air to attempt to intercept or reduce the direct impact of corrosive particles and salt spray on the valve core. However, the isolation design in these measures increases the complexity and size of the valve structure. Furthermore, if the sealing is strengthened by increasing the number of sealing rings, the frictional resistance of the valve core movement will increase linearly. This may lead to inflexible valve opening and closing, delayed response, or even the need for a more powerful actuator to drive the valve.

[0030] Based on the above research, this disclosure provides a vehicle-mounted shut-off valve, a protective mechanism, and a working method. By providing an opening and closing mechanism and a protective mechanism, during the up and down movement of the opening and closing mechanism, the valve core protection component in the protective mechanism moves synchronously. When the valve core in the opening and closing mechanism moves upward, the valve core protection component provided on the outer wall of the valve core covers the outer wall of the valve core to protect it and prevent corrosion by corrosive gases.

[0031] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventor's contribution to this disclosure.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0034] In some embodiments, such as Figure 1 As shown, before this vehicle-mounted shut-off valve is put into use, the operator needs to complete basic pipeline connection work. Specifically, the operator connects the external gas supply pipeline that delivers the gas to be treated to the air inlet 10 located on the side of the valve body 1. At the same time, the pipeline of the downstream equipment that needs to receive clean gas is connected to the exhaust port 11 on the other side of the valve body 1. Figure 1 What is shown is that the shut-off valve is closed, that is, the valve body 1 is not open; In this closed state, the top of the valve core 21 in the opening and closing mechanism 2 has been moved down to the lowest working position under the action of the driving device (not shown in the figure, but usually an electric actuator, etc.). The sealing piston 22 located at the bottom of the valve core 21 is pressed against the flow port 12 machined inside the valve body 1, thereby completely sealing the flow channel between the air inlet 10 and the exhaust port 11. At this time, the gas from the air inlet 10 is effectively intercepted below the sealing piston 22.

[0035] In some embodiments, such as Figure 1 and Figure 2As shown, when gas flow needs to be restored, the operator starts the external drive device to rotate the valve core 21. The outer wall of the valve core 21 is threaded, which meshes with the thread on the inner wall of the connecting sleeve 13 fixedly installed on the upper part of the outer wall of the valve body 1. When the valve core 21 is driven to rotate, the threaded pair converts the rotational motion into linear motion, causing the valve core 21 to move upward along its axis. As the valve core 21 moves upward, the sealing piston 22 at its bottom end rises synchronously from the flow port 12. The originally blocked flow channel is opened, and the gas in the inlet 10 can pass through the flow port 12, through the flow chamber 14, and finally be smoothly discharged from the exhaust port 11.

[0036] like Figure 2 As shown, several protective plates 310 are fixedly connected to the valve core 21 through their top ends. They move upwards together with the valve core 21. The material of each protective plate 310 is preferably rubber. In the initial stage of upward movement, the protective plates 310 maintain their open, flared shape, continuously dispersing the impact of the airflow on the valve core 21. When the upper outer edge of the protective plate 310 contacts the inner inclined surface of the closing ring 32 fixedly installed on the lower end face of the protective sleeve 30, the inner wall of the closing ring 32 is designed as a specific conical surface or guide surface. As the valve core 21 continues to rise, the outer wall of the protective plate 310 continuously abuts against and slides relative to the conical surface or guide surface of the closing ring 32. Under the constraint and guidance of the conical surface of the closing ring 32, the originally open protective plates 310 are forced to overcome their own elasticity and begin to move in a centripetal convergence. The protective plates 310 gradually converge, eventually adhering to and covering the outer wall of the valve core 21, protecting the outer wall of the valve core 21. Figure 2 It can be seen that the upper width of each protective plate 310 is smaller than the lower width. Simultaneously, the cross-section of the valve core 21 is tapered so that it can completely fit against the outer wall of the valve core 21 after the protective plates 310 are closed. Each protective plate 310, along with the valve core 21, enters the interior of the protective sleeve 30. A sealing ring can be further provided on the inner wall of the protective sleeve 30 to further prevent direct contact between the airflow and the valve core 21 during continuous flow. When each protective plate 310 enters the interior of the protective sleeve 30, the inner wall of the protective sleeve 30 and the outer wall of the valve core 21 simultaneously apply pressure to each protective plate 310, causing... Each protective plate 310 expands towards its sides to tightly abut against the adjacent protective plate 310, closing the gap between the adjacent protective plates 310 and further strengthening the seal on the valve core 21. Compared with the existing technology that uses multiple sealing rings to strengthen the seal, this method not only provides protection for the valve core 21 but also reduces the frictional resistance of the valve core 21's movement. At the same time, as each protective plate 310 and the valve core 21 enter the interior of the protective sleeve 30, the air inside the protective sleeve 30 can be discharged, preventing the residual air inside the protective sleeve 30 from causing corrosion when the valve body 1 is open for a long time.

[0037] When the airflow needs to be cut off again, the valve core 21 begins to move downward along the axis, and the blocking piston 22 descends accordingly. At the same time, the protective plate 310, which is fixed to the valve core 21, also begins to move downward synchronously. In the initial stage of downward movement, due to being freed from the constraint of the conical inner wall of the retracting ring 32, the protective plate 310 begins to naturally unfold outward under the action of its own elastic restoring force, gradually restoring its initial trumpet shape, without interfering with the downward movement of the valve core 21. The valve core 21 continues to move downward until the blocking piston 22 is once again tightly fitted with the flow port 12, realizing the complete closure of the valve. At the same time, the bottom end of the protective plate 310 re-enters the annular relief groove 33 on the inner wall of the flow chamber 14.

[0038] In the description of the embodiments of the present invention, 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 integral 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0039] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention 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 the invention. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as a second element, component, region, layer, or segment.

[0040] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0041] In the above discussion, unless otherwise stated, when used to describe numerical values, the terms “about,” “approximately,” “basically,” etc., indicate a change of + / - 10% in that value.

[0042] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A vehicle-mounted shut-off valve, characterized in that, include: The valve body (1) has a flow port (12) inside to connect the air inlet (10) and the exhaust port (11) on both sides of the valve body (1). An opening / closing mechanism (2) is disposed inside the valve body (1), and the valve core (21) in the opening / closing mechanism (2) is adapted to block the flow port (12) when it moves downward; and The protective mechanism (3) is disposed inside the valve body (1) and includes a protective sleeve (30) and a valve core protection assembly (31); wherein The valve core protection component (31) is connected to the upper end of the valve core (21) and is arranged around the outer wall of the valve core (21) so that after the valve core (21) moves up into the protective sleeve (30), the valve core protection component (31) closes and covers the outer wall of the valve core (21).

2. The vehicle-mounted shut-off valve as described in claim 1, characterized in that, The protective mechanism (3) includes: A gathering ring (32) is disposed on the lower end face of the protective sleeve (30); wherein The inner wall of the retractable ring (32) is adapted to abut against the outer wall of the valve core protection assembly (31) when the valve core (21) slides upward, so that the valve core protection assembly (31) covers the outer wall of the valve core (21).

3. The vehicle-mounted shut-off valve as described in claim 2, characterized in that, The valve body (1) has a flow chamber (14) inside, and an annular clearance groove (33) is provided on the inner wall of the flow chamber (14); wherein The valve core protection assembly (31) is adapted to be inserted into the annular clearance groove (33) when the valve core (21) moves down to block the air inlet (10).

4. The vehicle-mounted shut-off valve as described in claim 3, characterized in that, The valve core protection assembly (31) includes: Several protective plates (310) are arranged in a trumpet shape around the axis of the valve core (21) on the outer wall of the valve core (21); The top end of each of the protective plates (310) is connected to the valve core (21); wherein The outer wall of each of the protective plates (310) is adapted to abut against the inner wall of the retracting ring (32) when the valve core (21) slides upward, thereby retracting into the protective sleeve (30) to cover the outer wall of the valve core (21); and The bottom end of each of the protective plates (310) is adapted to be inserted into the annular clearance groove (33) when the valve core (21) moves down to block the air inlet (10).

5. The vehicle-mounted shut-off valve as described in claim 4, characterized in that, The opening and closing mechanism (2) includes: A blocking piston (22) is disposed at the bottom of the valve core (21); wherein The blocking piston (22) is adapted to block the air inlet (10) when the valve core (21) moves down.

6. The vehicle-mounted shut-off valve as described in claim 5, characterized in that, The outer wall of the valve core (21) is provided with threads (20); A connecting sleeve (13) is provided on the outer wall of the valve body (1); wherein The valve core (21) passes through the connecting sleeve (13), and the valve core (21) is threadedly engaged with the connecting sleeve (13).

7. A protective mechanism for a vehicle-mounted shut-off valve, characterized in that, include: The protective sleeve (30) extends vertically through the top of the valve body (1), and the valve core (21) extends through the protective sleeve (30). A gathering ring (32) is provided on the lower end face of the protective sleeve (30); in The inner wall of the retractable ring (32) is adapted to abut against the outer wall of the valve core protection assembly (31) when the valve core (21) slides upward, so that the valve core protection assembly (31) covers the outer wall of the valve core (21).

8. The protective mechanism for a vehicle-mounted shut-off valve as described in claim 7, characterized in that, The valve body (1) has a flow chamber (14) inside, and an annular clearance groove (33) is provided on the inner wall of the flow chamber (14); wherein The valve core protection assembly (31) is adapted to be inserted into the annular clearance groove (33) when the valve core (21) moves down to block the air inlet (10).

9. The protective mechanism for a vehicle-mounted shut-off valve as described in claim 8, characterized in that, The valve core protection assembly (31) includes: Several protective plates (310) are arranged in a trumpet shape around the axis of the valve core (21) on the outer wall of the valve core (21); The top end of each of the protective plates (310) is connected to the valve core (21); wherein The outer wall of each of the protective plates (310) is adapted to abut against the inner wall of the retracting ring (32) when the valve core (21) slides upward, thereby retracting into the protective sleeve (30) to cover the outer wall of the valve core (21); and The bottom end of each of the protective plates (310) is adapted to be inserted into the annular clearance groove (33) when the valve core (21) moves down to block the air inlet (10).

10. A method for operating a vehicle-mounted shut-off valve, characterized in that, The working method includes: By rotating the valve core (21) in the forward direction, it moves downward along the axis of the protective sleeve (30), causing the sealing piston (22) at the bottom of the valve core (21) to move downward to block the flow port (12). By rotating the valve core (21) in the opposite direction, it moves up along the axis of the protective sleeve (30) and comes into contact with the inner wall of the retracting ring (32). Each protective plate (310) retracts into the protective sleeve (30) to cover the outer wall of the valve core (21), thereby preventing the airflow from eroding the outer wall of the valve core (21).

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