A pneumatic control element

Abstract

A kind of pneumatic control element, including pilot valve and the working valve controlled by pilot valve switch, the working valve includes: valve body, the inside of the valve body is provided with: valve cavity and shaft core, the shaft core passes through the valve cavity along the axial direction of the shaft core, the inner wall of the valve cavity is provided with convex ring, the convex ring is arranged vertically the axial direction of shaft core, the inner diameter of the convex ring is provided with O ring, the shaft core passes through the O ring, the shaft core is also sealed with the O ring cooperation.By design, the inner wall of valve cavity portion in valve body is provided with convex ring, can facilitate assembly, O ring on convex ring is used to seal with shaft core, when shaft core works, shaft core carries out a lot of moving operation, also will not be worn, increase the service life of working valve.

Description

Technical Field

[0001] The present application relates to the field of valve design, and specifically to a novel design of a wear-resistant working valve head. Background Art

[0002] In existing valves, the shaft core and the valve cavity are tightly matched, and the switching of the passage is completed by the movement of the shaft core. Usually, the shaft core and the valve cavity are matched with plastic parts as seals, or the shaft core and the valve cavity are in direct contact. The consequence of this design is that during the high-intensity movement of the shaft core, the seal is easily damaged or the shaft core is worn, resulting in a loss of airtightness, and ultimately reducing the service life of the valve.

[0003] In some other embodiments, the seal is mounted on the shaft core. This requires the seal's mounting structure to be integrally molded onto the shaft core, increasing design complexity and production costs. Furthermore, the shaft core must also actuate the seal, increasing energy consumption and reducing valve power. Summary of the Invention

[0004] In view of the above problems, the present application provides a pneumatic control element, including a pilot valve and a working valve controlled by the pilot valve.

[0005] The working valve comprises:

[0006] The valve body is provided with:

[0007] A valve cavity and a shaft core, wherein the shaft core passes through the valve cavity along the axis direction of the shaft core, a convex ring is provided on the inner wall of the valve cavity, the convex ring is provided perpendicular to the axis direction of the shaft core, an O-ring is provided on the inner diameter of the convex ring, the shaft core passes through the O-ring, and the shaft core is also sealed with the O-ring, the pilot valve includes:

[0008] The valve head seat is provided with:

[0009] A mounting hole is provided in the mounting hole, wherein a button and a button spring providing a restoring force for the button are provided, wherein the button spring is provided below the button, wherein a first card slot is provided on the side wall of the button, wherein the first card slot is provided horizontally and is recessed inwardly along the radial direction of the button, and wherein a second card slot is provided on the side wall of the button, wherein the second card slot is provided horizontally and is recessed inwardly along the radial direction of the button,

[0010] A button card is horizontally arranged in the valve head seat, and a side wall of the valve head seat is further provided with a horizontal button card insertion hole, and the button card can be pulled out from the button card insertion hole;

[0011] The height of the first slot in the axial direction of the button is different from the height of the second slot in the axial direction of the button. When the button card is in two states of being engaged with the first slot and being engaged with the second slot, the button is pushed to different height positions by the button spring.

[0012] In one embodiment of the present application, an annular notch is further provided on the inner wall of the convex ring, and the notch is used to accommodate the O-ring.

[0013] In one embodiment of the present application, the outer ring thickness of the convex ring is greater than the inner ring thickness of the convex ring, and the thickness direction is parallel to the axial direction.

[0014] In one embodiment of the present application, the thickness from the outer ring of the convex ring to the inner ring of the convex ring changes in an arc shape on the first cross-section, and the first cross-section is a plane determined by the diameter of the convex ring and the axis of the convex ring, or the thickness from the outer ring of the convex ring to the inner ring of the convex ring changes in a linear shape on the first cross-section, and the first cross-section is a plane determined by the diameter of the convex ring and the axis of the convex ring.

[0015] In one embodiment of the present application, a push rod spring is further provided at the lower end of the button spring, and a push rod is provided at the lower end of the push rod spring.

[0016] In one embodiment of the present application, the grooves of the first card slot and the second card slot are connected.

[0017] In one embodiment of the present application, a first guide structure is provided between the first card slot and the second card slot.

[0018] In one embodiment of the present application, the upper edge of the first card slot and the lower edge of the second card slot have different heights, and the upper edge of the first card slot and the upper edge of the second card slot have the same height.

[0019] In one embodiment of the present application, a second guide structure is provided between the lower groove edge of the first slot and the lower groove edge of the second slot.

[0020] In one embodiment of the present application, the upper surface of the button also includes a straight groove, there are two first card slots, the two first card slots are arranged opposite to each other in the radial direction of the button, and there are two second card slots, the two second card slots are arranged opposite to each other in the radial direction of the button.

[0021] By designing a raised ring on the inner wall of the valve cavity within the valve body, assembly is facilitated. The O-ring on the raised ring seals against the shaft core, preventing wear during extensive movement of the shaft core during operation, thereby increasing the service life of the operating valve. This solution also achieves the technical effect of adjusting the button height, and the button can be directly installed through the mounting hole, simplifying assembly. Compared to solutions where the button engages with the side wall of the valve head seat, this solution saves installation steps, simplifies component manufacturing, and facilitates maintenance.

[0022] The above-mentioned records related to the content of the invention are only an overview of the technical solution of this application. In order to enable ordinary technicians in this field to understand the technical solution of this application more clearly, and then implement it according to the text of the specification and the contents recorded in the drawings, and to make the above-mentioned purposes and other purposes, features and advantages of this application easier to understand, the following is an explanation in combination with the specific implementation methods and drawings of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, characteristics and effects of the specific embodiments of this application and other related contents, and are not to be considered as limiting this application.

[0024] In the drawings of the specification:

[0025] Figure 1 This is an exploded view of a working valve structure described in a specific embodiment;

[0026] Figure 2 This is a schematic diagram of the cross-sectional structure of the working valve described in the specific implementation method;

[0027] Figure 3 This is a schematic diagram of the axial style of the convex ring described in the specific embodiment;

[0028] Figure 4 It is a first cross-sectional schematic diagram of the convex ring according to the specific embodiment;

[0029] Figure 5 is a first cross-sectional schematic diagram of a convex ring according to another embodiment;

[0030] Figure 6 It is an exploded view of the installation of the valve head of the pilot valve according to the specific embodiment;

[0031] Figure 7 It is an enlarged schematic diagram of the button component described in the specific embodiment;

[0032] Figure 8 This is a side view of a button with a first guide structure according to a specific embodiment;

[0033] Figure 9 This is a schematic diagram of the side expansion of the button described in the specific embodiment;

[0034] Figure 10 This is a side view of a button with a second guide structure according to a specific embodiment;

[0035] The reference numerals in the above drawings are described as follows:

[0036] 2. Valve body;

[0037] 20. Projection ring;

[0038] 21. O-ring;

[0039] 22. Axis core;

[0040] 23. Valve chamber;

[0041] 5. Valve head seat;

[0042] 50. Mounting hole;

[0043] 6. Button card;

[0044] 60. Button card jack;

[0045] 7. Button;

[0046] 70, slotted;

[0047] 701, first guide structure;

[0048] 702, second guide structure;

[0049] 71. First card slot;

[0050] 72. Second card slot;

[0051] 8. Button spring;

[0052] 9. Ejector spring;

[0053] 10. Push rod. DETAILED DESCRIPTION

[0054] In order to explain in detail the possible application scenarios, technical principles, specific solutions that can be implemented, and the purpose and effects of this application, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of this application and are therefore only examples and are not intended to limit the scope of protection of this application.

[0055] References to "embodiments" herein mean that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the word "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the various technical features mentioned in the embodiments can be combined in any manner to form a corresponding implementable technical solution.

[0056] Unless otherwise defined, the technical terms used herein have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms herein is only for describing specific embodiments and is not intended to limit this application.

[0057] In the description of this application, the term "and / or" is used to describe a logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and both A and B exist. In addition, the character " / " in this document generally indicates that the objects before and after are in a logical "or" relationship.

[0058] In this application, terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, priority or sequence relationship between these entities or operations.

[0059] Without further limitations, in this application, the words "include", "comprise", "have" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those defined elements, but also other elements not explicitly listed, or elements inherent to such process, method or product.

[0060] Consistent with the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceed" are understood to exclude the number itself; expressions such as "above," "below," and "within" are understood to include the number itself. Furthermore, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this manner, such as "multiple groups," "multiple times," etc., unless otherwise specifically defined.

[0061] In the description of the embodiments of the present application, the space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it should not be understood as a limitation on the embodiments of the present application.

[0062] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms "installed", "connected", "connected", "fixed", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art of the present application, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0063] A pneumatic control element, including a pilot valve and a working valve controlled by the pilot valve. Figure 1 Schematic diagram of the working valve explosion, and Figure 6, a schematic diagram of the valve head structure of a pilot valve. The working valve of the pneumatic control element includes: a valve body 2, wherein a valve cavity 23 and a shaft core 22 are provided inside the valve body 2. The shaft core 22 passes through the valve cavity 23 along the axis of the shaft core 22. A convex ring 20 is provided on the inner wall of the valve cavity 23. The convex ring 20 is arranged perpendicular to the axis of the shaft core 22. An O-ring 21 is provided on the inner diameter of the convex ring 20. The shaft core 22 passes through the O-ring 21 and the shaft core 22 is also sealed with the O-ring 21. The valve head seat 5 comprises: a valve head seat 5, the valve head seat 5 is provided with: a mounting hole 50, a button 7 and a button spring 8 providing a restoring force for the button 7 are provided in the mounting hole 50, the button spring 8 is provided below the button 7, the side wall of the button 7 is provided with a first card slot 71, the first card slot 71 is arranged horizontally, and is recessed radially inwardly along the button 7, the side wall of the button 7 is provided with a second card slot 72, the second card slot 72 is arranged horizontally, and is recessed radially inwardly along the button 7, a button card 6 is horizontally arranged in the valve head seat 5, and a side wall of the valve head seat 5 is further provided with a horizontal button card insertion hole 60, the button card 6 can be pulled out from the button card insertion hole 60; the height of the first card slot 71 in the axial direction of the button 7 is different from the height of the second card slot 72 in the axial direction of the button 7, and when the button card 6 is in the two states of being engaged with the first card slot 71 and the second card slot 72, the button 7 is pushed to different height positions by the button spring 8.

[0064] Among them, the valve body 2 is the component that is responsible for the connection and conversion of the input and output of the working valve passage. Figure 1 As shown, the valve body 2 can be set to a cubic shape, and the side of the valve body 2 along the line AA direction is a schematic cross-sectional view. Figure 2 As shown, the positional relationship between the valve cavity 23 and the shaft core 22 can be seen. The valve body 2 is generally arranged to be parallel to the shaft core 22 in the length direction. The valve cavity 23 is provided inside the valve body 2. The valve cavity 23 is a hollow component inside the valve body 2 that contains the working medium. The valve cavity 23 can have several inlets and outlets on the surface of the valve body 2. The valve cavity 23 can also be set as several small chambers as needed. The movement of the shaft core 22 can realize the connection between different chambers and different inlets or outlets, thereby achieving the working purpose. Please continue to refer to Figure 6 , the pilot valve can be an air valve, and the on-off of the pilot valve air circuit can be used to control the subsequent valves. Figure 6In the shown example, the valve head base 5 is a basic component of the valve head, and the mounting hole 50 is generally arranged at the upper part of the valve head base 5, so that the button 7 and the button spring 8 can be inserted and mounted from the upper end. The button spring 8 is used to provide support for the button 7, and the lower end of the button spring 8 can be supported on the reinforcing rib structure arranged on the inner wall of the mounting hole 50. As shown in the figure, the button card insertion hole 60 can be arranged on the outer wall of the valve head base 5, and the button card insertion hole 60 is in communication with the mounting hole 50, and when the button card 6 is inserted, one end of the button card 6 can extend into the mounting hole 50 and be clamped with the first clamping groove 71 or the second clamping groove 72 on the button 7.

[0065] Specifically, some of the Figure 7 In the shown embodiment, the enlarged schematic view of the structure of the button 7 is shown, and the first clamping groove 71 and the second clamping groove 72 are arranged at different heights in the button 7, and the shapes of the first clamping groove 71 and the second clamping groove 72 are not limited, as long as they can be clamped with the button card 6. In some embodiments, the button card 6 can be a simple rectangle, and when the button card 6 is inserted, the rotation of the button 7 can be limited. The positions of the first clamping groove 71 and the second clamping groove 72 on the button 7 are at different heights. Due to the fixed design position of the button card insertion hole 60, when the button card 6 is clamped with the first clamping groove 71 and the second clamping groove 72, respectively, the button 7 can be pushed to different positions by the button spring 8 and abutted against the fixed position. Through the above scheme, the technical effect of adjusting the height of the button 7 can be achieved, and the button 7 can be directly assembled from the mounting hole 50, and the assembly is simple. Compared with the technical scheme that the button 7 is clamped with the side wall of the valve head base 5, the installation steps can be saved, the components are easy to manufacture, and maintenance is also easy. In this way, the pneumatic control element of the present application can achieve the technical effects of improving the service life and facilitating maintenance.

[0066] The convex ring 20 is a ring-shaped object, and the ring plane of the convex ring 20 is perpendicular to the axis direction of the shaft core 22, so the axis of the shaft core 22 passes through the center of the convex ring 20, and the diameter direction of the convex ring 20 is divided into an inner diameter and an outer diameter, the outer diameter of the convex ring 20 is in abutment with the valve cavity 23 and can be obtained by fine machining on a lathe, and the inner diameter of the convex ring 20 is used to be in abutment with the shaft core 22, so the inner diameter of the convex ring 20 can be arranged to be substantially equivalent to the diameter of the shaft core 22. Considering the existence of the O-ring 21, the inner diameter of the convex ring 20 will be slightly larger than the diameter of the shaft core 22.

[0067] The material of the O-ring 21 can be plastic, rubber, resin, silicone, etc., and in some embodiments of the present application, the O-ring 21 can be arranged to be of rubber material, which is more wear-resistant and corrosion-resistant, and can significantly increase the service life of the present application.

[0068] The above design scheme provides a raised ring 20 on the inner wall of the valve cavity 23 in the working valve, facilitating assembly. The O-ring 21 on the raised ring 20 seals against the shaft core 22. This prevents wear during the extensive movement of the shaft core 22 during operation, thereby extending the service life of the working valve. Compared to solutions in which the sealing ring is mounted on the shaft core 22, this design also saves energy.

[0069] In some embodiments of this application, please refer to Figure 2 The inner wall of the convex ring 20 is also provided with an annular notch for accommodating the O-ring 21. As can be seen from the figure, the notch is provided on the inner diameter of the convex ring 20, and the depth of the notch is concave from the inner diameter of the convex ring 20 to the outer diameter of the convex ring 20. The O-ring 21 has a certain elasticity and can be directly inserted into the notch by hand during assembly. The notch design can achieve the technical effect of fixing the O-ring 21, thereby preventing the O-ring 21 from sliding during operation and causing sealing problems.

[0070] In some embodiments of the present application, the convex ring 20 can be integrally provided in the valve cavity 23, which will have higher requirements for the casting mold, will be more stable, and the convex ring 20 will not be easily loosened. In some other embodiments, the convex ring 20 and the valve cavity 23 are separable designs. The convex ring 20 can be cast in a single piece, and the outer wall of the convex ring 20 is set to the same size as the inner wall of the valve cavity 23. Then, the convex ring 20 with the O-ring 21 is driven into the preset position in the valve cavity 23 by a punching machine or other similar machine. By adjusting the stroke of the punching machine, multiple convex rings 20 can be driven into the valve cavity 23. This can cooperate with the design of each chamber in the valve cavity 23 to achieve the technical effect of mutual sealing.

[0071] In some embodiments of the present application, the protruding ring 20 is a metal ring. The protruding ring 20 can be made of plastic, carbon fiber, or the like. The advantages of using a metal ring include sufficient hardness, resistance to deformation, and manageable costs. The metal ring can be an iron ring, an aluminum alloy ring, a copper ring, or the like. Copper is a common metal with a relatively low cost. To reduce production costs, this solution can also use the protruding ring 20 as a copper ring.

[0072] In some embodiments of the present application, Figure 3In the illustrated embodiment, the inner and outer directions of the convex ring 20 are defined gradually outward along the radial direction. The outer ring thickness of the convex ring 20 is greater than the inner ring thickness of the convex ring 20, and the thickness direction is parallel to the axial direction (perpendicular to the paper). This arrangement enables the outer ring of the convex ring 20 to have a larger contact area and a larger static friction force when in contact with the valve cavity 23, so that the convex ring 20 is not likely to slip relative to the valve cavity 23 during the movement of the shaft core 22, resulting in damage to the sealing structure. On the other hand, the lower inner ring thickness of the convex ring 20 also reduces the friction with the shaft core 22, thereby reducing the work done by friction, thereby reducing the energy consumption of this application and being more environmentally friendly.

[0073] In some embodiments, please refer to Figure 4 , is the first cross-sectional schematic diagram of this solution (BB direction). On the first cross-sectional diagram, the thickness from the outer ring of the convex ring 20 to the inner ring of the convex ring 20 changes in an arc shape. The first cross-sectional diagram is a plane determined by the diameter of the convex ring 20 and the axis of the convex ring 20. In this embodiment, the first cross-sectional diagram can also be a cross-sectional diagram in the BB direction. In order to improve the hardness of the convex ring 20, the convex ring 20 can be set as a copper ring. The assembly of the copper ring in the valve cavity 23 can use an impact head (tooling not shown) that is compatible with the surface shape of the convex ring 20. The assembly purpose can be achieved by supporting the copper ring and pressing the copper ring into the valve cavity 23. The surface of the convex ring 20 that changes in an arc shape can adapt to the impact head with a round head. The impact head with a round head can reduce the wear of the convex ring 20 during the assembly process and increase the service life of this design.

[0074] In some other embodiments, see Figure 5 , is a schematic diagram of a first cross-section of another embodiment. As can be seen in the figure, in the first cross-section, the thickness from the outer ring of the convex ring 20 to the inner ring of the convex ring 20 changes linearly. The first cross-section is a plane defined by the diameter of the convex ring 20 and the axis of the convex ring 20. In this embodiment, to increase the hardness of the convex ring 20, the convex ring 20 can be configured as a copper ring. The copper ring can be assembled within the valve cavity 23 using an impact head that matches the surface shape of the convex ring 20. The copper ring is pressed into the valve cavity 23 to achieve the assembly purpose. The linear surface of the convex ring 20 can adapt to the angled impact head, which can engage more tightly during assembly, making the assembly process labor-saving and easy.

[0075] In some embodiments of the present application, the working valve is a gas valve or a hydraulic valve. Regardless of whether a gas valve or a hydraulic valve is selected, both can achieve a better seal between the convex ring 20 and the shaft core 22, thereby increasing the service life of the working valve. Preferably, the working valve can be used as a gas valve. The lower-level mechanism controlled by the gas valve generally requires faster work and has a higher service life requirement.

[0076] By designing a convex ring 20 on the inner wall of the valve cavity 23 in the valve body 2, assembly can be facilitated. The O-ring 21 on the convex ring 20 is used to seal with the shaft core 22. When the shaft core 22 is working, the shaft core 22 performs a large amount of movement operations and will not be worn, thereby increasing the service life of the working valve.

[0077] Please refer to Figure 6 The present application provides a valve head structure of a pilot valve, comprising: a valve head seat 5, the valve head seat 5 is provided with: a mounting hole 50, a button 7 and a button spring 8 providing a restoring force for the button 7 are provided in the mounting hole 50, the button spring 8 is arranged below the button 7, the side wall of the button 7 is provided with a first card slot 71, the first card slot 71 is arranged horizontally, and is recessed inwardly along the radial direction of the button 7, the side wall of the button 7 is provided with a second card slot 72, the second card slot 72 is arranged horizontally, and is recessed inwardly along the radial direction of the button 7, a button card 6 is horizontally arranged in the valve head seat 5, and a side wall of the valve head seat 5 is further provided with a horizontal button card insertion hole 60, the button card 6 can be pulled out from the button card insertion hole 60; the height of the first card slot 71 in the axial direction of the button 7 is different from the height of the second card slot 72 in the axial direction of the button 7, and when the button card 6 is in the two states of being engaged with the first card slot 71 and the second card slot 72, the button 7 is pushed to different height positions by the button spring 8.

[0078] In one embodiment of the present application, please refer to Figure 6 The lower end of the button 7 is also provided with a push rod spring 9, and the lower end of the push rod spring 9 is provided with a push rod 10. The push rod spring 9 can be used to softly connect the button 7 and the push rod 10, transmitting the pressure on the button 7. In other embodiments, the push rod spring 9 can also be replaced with a hard connector to achieve the same technical effect. By providing the push rod spring 9 and the push rod 10, the opening and closing of the pilot valve air circuit can be controlled, achieving the technical effect of closing the air circuit after locking the button 7.

[0079] To facilitate the design and mold-opening process of the slot structure of the button 7, in one embodiment of the present application, the grooves of the first slot 71 and the second slot 72 are connected. The purpose of designing the first slot 71 and the second slot 72 to be connected is to facilitate the use of the button 7 when rotating it, and to switch the state of the button card 6 being engaged with the first slot 71 and the state of the button card 6 being engaged with the second slot 72 by simply rotating the button 7. The connection between the first slot 71 and the second slot 72 means that there is always a path A from any point in the first slot 71 to any point in the second slot 72, and the path A does not include points on the circumscribed cylindrical surface of the button 7.

[0080] In some Figure 8In the specific embodiment shown, a first guide structure 701 is arranged between the first clamping groove 71 and the second clamping groove 72. Figure 3 The unfolded view of the cylindrical side surface of the button 7 after being cut along the generatrix is shown, and the first guide structure 701 is a guide groove with the same width as the first clamping groove 71 and the second clamping groove 72. The first clamping groove 71 and the second clamping groove 72 are connected through the guide groove, so that when the button 7 is rotated, the button card 6 can be switched from the state of being clamped in the first clamping groove 71 to the state of being clamped in the second clamping groove 72 through being clamped in the guide groove, thereby adjusting the height of the button 7 against the button card 6, achieving the technical effect of controlling the height of the ejector rod 10, and finally controlling the opening and closing of the gas path of the pilot valve.

[0081] Some other embodiments of the present application are as follows Figure 9 In the embodiment shown, the upper groove edge of the first clamping groove 71 is different in height from the lower groove edge of the second clamping groove 72, and the upper groove edge of the first clamping groove 71 is the same in height as the upper groove edge of the second clamping groove 72. Figure 4 The unfolded view of the cylindrical side surface of the button 7 after being cut along the generatrix is shown, and similarly, this arrangement is also an embodiment in which the first clamping groove 71 and the second clamping groove 72 are in communication. For a more detailed description, please refer to Figure 2 When it is necessary to switch the clamping state, assuming that the initial state is that the button card 6 is clamped in the first clamping groove 71, and the lower groove edge of the first clamping groove 71 is in contact with the button card 6, the user can first press the button 7 slightly downward, so that the lower groove edge of the first clamping groove 71 is separated from the button card 6, and then rotate the button 7, after rotating through a preset angle, the user releases the button 7, so that the lower groove edge of the second clamping groove 72 is in contact with the button card 6. Because the lower groove edge of the first clamping groove 71 is different in height from the lower groove edge of the second clamping groove 72 in the vertical direction in the figure, the height of the button 7 is also different in the two states, thereby compressing the ejector rod spring 9 and driving the ejector rod 10 to different positions, thereby achieving switching between the two states of closing and opening the gas valve by the ejector rod 10. The advantage of setting the upper groove edge of the first clamping groove 71 and the upper groove edge of the second clamping groove 72 to be the same in height is that the maximum stroke of the button 7 when being pressed downward is determined, and at the same time, the upper groove edges with the same height can reduce the difficulty of design and production, thereby reducing the production cost.

[0082] Some other embodiments of the present application are as follows Figure 10 In the embodiment shown, a second guide structure 702 is arranged between the lower groove edge of the first clamping groove 71 and the lower groove edge of the second clamping groove 72. The guide structure can make the state of the button card 6 being in contact with the lower groove edge of the first clamping groove 71 be smoothly switched to the state of the button card 6 being in contact with the lower groove edge of the second clamping groove 72 through rotating the button 7. For a more detailed description, please refer to Figure 10As shown in , the second guide structure 702 may be a slope structure with a horizontal elevation angle, one end of which is connected to the lower edge of the first slot 71 and the other end of which is connected to the lower edge of the second slot 72. When the button 7 is rotated, there is a transitional state between the state where the button card 6 abuts against the second guide structure 702, between the state where the button card 6 abuts against the lower edge of the first slot 71 and the state where the button card 6 abuts against the lower edge of the second slot 72, thereby achieving the technical effect of directly rotating the button 7.

[0083] To facilitate the user to turn button 7, please refer to Figure 7 In the embodiment shown, the upper surface of the button 7 further includes a slot 70. The button 7 is normally positioned within the mounting hole 50, making rotation difficult. The slot 70 above the button 7 allows the user to directly operate the button 7 by inserting a flat-blade screwdriver into the slot 70.

[0084] In some simple embodiments, the button card 6 can be a single rectangular thin sheet, which can be engaged with the first card slot 71 or the second card slot 72 through the portion in the mounting hole 50. In some other embodiments, there are two first card slots 71, and the two first card slots 71 are arranged opposite to each other in the radial direction of the button 7. A second card slot 72 is provided between the two first card slots 71. In this way, when the button card 6 is engaged with the second card slot 72, no matter which direction the button 7 is rotated, it can be rotated to the state where the button card 6 is engaged with the first card slot 71. Such a setting can facilitate user operation.

[0085] To facilitate user operation, in some embodiments of the present application, there are two second card slots 72, and the two second card slots 72 are arranged opposite to each other in the radial direction of the button 7. The button card 6 can be a single rectangular thin sheet, and the portion inside the mounting hole 50 can be engaged with the first card slot 71 or the second card slot 72. A first card slot 71 is provided between the two second card slots 72. In this way, when the button card 6 is engaged with the first card slot 71, no matter which direction the button 7 is rotated, it can be rotated to the state where the button card 6 is engaged with the second card slot 72.

[0086] In a further embodiment, two first card slots 71 and two second card slots 72 can be designed on the button 7 at the same time. The two first card slots 71 are arranged at relative positions in the radial direction of the button 7, and the two second card slots 72 are also arranged at relative positions in the radial direction of the button 7. The first card slots 71 and the second card slots 72 are arranged at intervals and are evenly arranged in the 360-degree circumferential direction of the button 7. In this way, no matter whether the engagement state of the button card 6 is engaged with the first card slot 71 or the second card slot 72, it can be switched to the other engagement state by simply rotating 90 degrees.

[0087] In order to better cooperate with the buttons 7 of the two first slots 71 and the two second slots 72, please refer to Figure 1 As shown in the figure, the button card 6 is in the shape of a Chinese character "凵". The two parallel parts of the button card 6 can extend into the mounting hole 50 on both sides at the same time, contacting the button 7 from both sides respectively, and can be engaged with the two first slots 71 or the two second slots 72 at the same time. After the button 7 is rotated, the technical effect of adjusting the engagement state of the button card 6 and the button 7 can also be achieved. Compared with the embodiment in which the button card 6 is designed only on one side, the advantage of this design is that the button card 6 can be installed more firmly and the clamping effect is better.

[0088] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concepts of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A pneumatic control element, characterized in that: It includes a pilot valve and a working valve controlled by the pilot valve. The working valve comprises: The valve body is provided with: A valve cavity and a shaft core, wherein the shaft core passes through the valve cavity along the axial direction of the shaft core, a convex ring is provided on the inner wall of the valve cavity, the convex ring is provided perpendicular to the axial direction of the shaft core, an O-ring is provided on the inner diameter of the convex ring, and an annular notch is provided on the inner wall of the convex ring, the notch is used to accommodate the O-ring, the outer ring thickness of the convex ring is greater than the inner ring thickness of the convex ring, and the thickness direction is parallel to the axial direction, the shaft core passes through the O-ring, and the shaft core is also sealed with the O-ring, and the pilot valve includes: The valve head seat is provided with: A mounting hole is provided in the mounting hole, wherein a button and a button spring providing a restoring force for the button are provided, wherein the button spring is provided below the button, wherein a first card slot is provided on the side wall of the button, wherein the first card slot is provided horizontally and is recessed inwardly along the radial direction of the button, and wherein a second card slot is provided on the side wall of the button, wherein the second card slot is provided horizontally and is recessed inwardly along the radial direction of the button, A button card is horizontally arranged in the valve head seat, and a side wall of the valve head seat is further provided with a horizontal button card insertion hole, and the button card can be pulled out from the button card insertion hole; The height of the first slot in the axial direction of the button is different from the height of the second slot in the axial direction of the button. When the button card is engaged with the first slot or the second slot, the button is pushed to different height positions by the button spring.

2. A pneumatic control element according to claim 1, characterized in that: The thickness from the outer ring of the convex ring to the inner ring of the convex ring on the first cross-section changes in an arc shape, and the first cross-section is a plane determined by the diameter of the convex ring and the axis of the convex ring, or the thickness from the outer ring of the convex ring to the inner ring of the convex ring on the first cross-section changes in a linear shape, and the first cross-section is a plane determined by the diameter of the convex ring and the axis of the convex ring.

3. A pneumatic control element according to claim 1, characterized in that: The lower end of the button spring is further provided with a push rod spring, and the lower end of the push rod spring is provided with a push rod.

4. A pneumatic control element according to claim 1, characterized in that: The grooves of the first card slot and the second card slot are communicated.

5. A pneumatic control element according to claim 4, characterized in that: A first guide structure is provided between the first card slot and the second card slot.

6. A pneumatic control element according to claim 4, characterized in that: The upper groove edge of the first card slot and the lower groove edge of the second card slot have different heights, and the upper groove edge of the first card slot and the upper groove edge of the second card slot have the same height.

7. A pneumatic control element according to claim 6, characterized in that: A second guiding structure is provided between the lower groove edge of the first slot and the lower groove edge of the second slot.

8. A pneumatic control element according to claim 1, characterized in that: The upper surface of the button further includes a straight groove, wherein there are two first card slots, which are arranged opposite to each other in the radial direction of the button, and there are two second card slots, which are arranged opposite to each other in the radial direction of the button.

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