Valve structure and nut assembling method

Abstract

The invention provides a valve structure and a nut assembling method, the valve structure comprises a valve body and a nut, the valve body is provided with a joint, the periphery of the joint is provided with an external thread, and an internal thread of the nut is screwed and matched with the external thread of the joint; an annular clamping groove is formed in the periphery of the connector, and the clamping groove is formed by sinking inwards from the outer surface of the connector and located on the side, away from the nut, of the external thread. The valve structure further comprises an identification overturning piece which is of a conical ring structure and arranged on the periphery of the connector in a sleeving mode, the inner periphery of the identification overturning piece is clamped in the clamping groove, the identification overturning piece can be converted between a first state and a second state, in the first state, the identification overturning piece inclines towards one side of the nut, and in the second state, the identification overturning piece inclines towards the other side of the nut. Identifying that one side of the overturning sheet is inclined back to the nut; the valve structure is configured in the mode that in the screwing process of the nut on the connector, the nut presses and abuts against the recognition overturning piece so that the recognition overturning piece can be overturned into the second state from the first state.

Description

Technical Field

[0001] The invention relates to a valve structure and a nut assembling method. Background Art

[0002] Nuts are provided on the joints of existing valve structures. For example, nuts are used to connect external pipelines to the interfaces of the valve body, and the nuts and interfaces are threaded. However, when the assembly position of the valve structure is inconvenient to observe, such as when the stop valve is installed in an external unit of a high-rise building or in a small and compact space, the operator cannot visually check whether the nut is assembled in place, and there will be a large margin between the force applied and the actual tightening during the screwing of the nut and the joint. If no inspection is performed, it is difficult to ensure the accuracy of the assembly, resulting in poor assembly of the nut of the valve structure, affecting the functional stability and safety of the equipment. Summary of the invention

[0003] A main purpose of the present invention is to overcome at least one of the above-mentioned defects of the prior art and to provide a valve structure capable of performing assembly inspection on a nut at an assembly position that is difficult to observe.

[0004] To achieve the above object, the present invention adopts the following technical solution:

[0005] According to one aspect of the present invention, there is provided a valve structure, comprising a valve body and a nut, wherein the valve body has a joint, the outer periphery of the joint has an external thread, and the internal thread of the nut is threadedly matched with the external thread of the joint; wherein: an annular groove is provided on the outer periphery of the joint, the groove is formed by being recessed inwardly from the outer surface of the joint, and is located on the side of the external thread away from the nut; the valve structure also comprises an identification flip sheet, the identification flip sheet is in the form of a conical ring structure and is sleeved on the outer periphery of the joint, the inner periphery of the identification flip sheet is clamped in the groove, the identification flip sheet can be transformed between a first state and a second state, in the first state, the identification flip sheet is inclined toward one side of the nut, and in the second state, the identification flip sheet is inclined away from the one side of the nut; wherein the valve structure is configured as follows: during the tightening process of the nut on the joint, the nut presses against the identification flip sheet to flip the identification flip sheet from the first state to the second state.

[0006] According to one embodiment of the present invention, an opening is formed on the inner periphery of the identification flip sheet.

[0007] According to one embodiment of the present invention, at least two openings are formed on the inner circumference of the identification flip sheet, and the at least two openings are arranged at intervals along the circumferential direction of the inner circumference of the identification flip sheet.

[0008] According to one embodiment of the present invention, the outer diameter of the identification flip sheet is greater than the outer diameter of the nut.

[0009] According to one embodiment of the present invention, the inner diameter of the identification flip sheet is smaller than the outer diameter of the external thread.

[0010] According to one embodiment of the present invention, the inclination angle of the corresponding conical surface of the identification flip sheet is greater than or equal to 30° and less than 90°.

[0011] According to one embodiment of the present invention, the cross-sectional shape of the card slot is an inverted trapezoid, and the inclination angle of the card slot wall is greater than 0 and less than or equal to 60°.

[0012] According to one embodiment of the present invention, the cross-sectional shape of the card slot is an inverted trapezoid, and the inclination angle of the card slot wall is equal to the inclination angle of the corresponding conical surface of the identification flip sheet; wherein, in a first state, a side surface portion of the identification flip sheet abuts against a side surface wall of the card slot, and in a second state, another side surface portion of the identification flip sheet abuts against another side surface wall of the card slot.

[0013] According to one embodiment of the present invention, the identification flip sheet is made of elastic insulating material.

[0014] Another main purpose of the present invention is to overcome at least one of the above-mentioned defects of the prior art and provide a nut assembly method suitable for operating at an assembly position that is difficult to observe and detecting whether the nut is assembled in place.

[0015] To achieve the above object, the present invention adopts the following technical solution:

[0016] According to another aspect of the present invention, there is provided a nut assembly method for assembling a nut in a valve structure, wherein the valve structure comprises a valve body, the valve body has a joint, the outer periphery of the joint has an external thread, the internal thread of the nut is threadedly matched with the external thread of the joint, the outer periphery of the joint is provided with an annular groove, the groove is formed by being recessed inward from the outer surface of the joint and is located on the side of the external thread away from the nut, the valve structure further comprises an identification flip sheet, the identification flip sheet is a conical ring structure; wherein the nut assembly method comprises: sleeve the identification flip sheet on the joint and move it toward the groove until the identification flip sheet The inner periphery of the nut is inserted into the slot, and the identification flip sheet is in the second state in the above process. In the second state, the identification flip sheet is inclined toward one side of the moving direction; the identification flip sheet is flipped to convert the identification flip sheet into the first state. In the first state, the identification flip sheet is inclined toward one side of the joint end; the nut is screwed onto the joint, and the nut moves toward the identification flip sheet during the screw-in process. When the nut is tightened, it presses against the identification flip sheet to flip the identification flip sheet from the first state to the second state, so that the operator can touch the identification flip sheet to see if it is in the second state to confirm whether the nut is assembled in place.

[0017] It can be seen from the above technical solution that the advantages and positive effects of the valve structure and nut assembly method proposed in the present invention are:

[0018] The valve structure proposed in the present invention has an annular card slot on the outer periphery of the joint, and an identification flip sheet with a conical ring structure is sleeved on the joint, and the inner periphery of the identification flip sheet is placed in the card slot. The identification flip sheet can be transformed between a first state and a second state. In the first state, the identification flip sheet is tilted toward one side of the nut, and in the second state, the identification flip sheet is tilted away from the nut. Accordingly, during the tightening process of the nut on the joint, the nut presses against the identification flip sheet to flip the identification flip sheet from the first state to the second state. Through the above design, the present invention can utilize the morphological changes of the identification flip sheet in different states, and the operator can identify it only by touching it, and then judge whether the nut is assembled in place. In addition, the present invention can realize the fool-proof function of nut assembly in place without visual inspection, so it is particularly suitable for assembly scenarios when the assembly position of the valve structure is inconvenient for visual observation, which is conducive to ensuring the accuracy of assembly, avoiding poor assembly of the nut, and ensuring the functional stability and safety of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Various objects, features and advantages of the present invention will become more apparent by considering the following detailed description of preferred embodiments of the present invention in conjunction with the accompanying drawings. The accompanying drawings are merely exemplary illustrations of the present invention and are not necessarily drawn to scale. In the accompanying drawings, the same reference numerals always refer to the same or similar parts. Among them:

[0020] Figure 1 is a schematic diagram of a three-dimensional structure of a valve structure according to an exemplary embodiment;

[0021] Figure 2 yes Figure 1 A partial exploded schematic diagram of the valve structure shown;

[0022] Figure 3 yes Figure 1 A schematic plan view of the valve structure shown;

[0023] Figure 4 yes Figure 3 A top view of

[0024] Figure 5 is along Figure 4 The cross-section made by the straight line AA in;

[0025] Figure 6 yes Figure 5 An enlarged schematic diagram of part B in FIG.

[0026] Figure 7 yes Figure 1 The three-dimensional structural schematic diagram of the identification flip sheet is shown;

[0027] Figure 8 yes Figure 7 A schematic plan view of the identification flip sheet is shown;

[0028] Fig. 9 is along Figure 8 The cross-section made by the straight line CC in;

[0029] Fig.10 yes Figure 1 A schematic plan view of the valve body is shown;

[0030] Fig.11 It is a schematic diagram of the structural design of the valve structure;

[0031] Fig.12 is a process flow chart of a nut assembly method according to an exemplary embodiment;

[0032] Figures 13 to 17 The valve structure is Fig.12 A structural schematic diagram showing several steps of a nut assembly method.

[0033] The following are the descriptions of the reference numerals:

[0034] 100. Valve body;

[0035] 110. Connector;

[0036] 111. External thread;

[0037] 112. Card slot;

[0038] 200. Nut;

[0039] 300. Identify the flip film;

[0040] 310. Open your mouth;

[0041] 400. Pipeline;

[0042] α. Tilt angle;

[0043] β. Tilt angle;

[0044] Steps S1 to S3. DETAILED DESCRIPTION

[0045] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and drawings therein are essentially for illustrative purposes rather than for limiting the present invention.

[0046] In the following description of different exemplary embodiments of the present invention, reference is made to the accompanying drawings, which form a part of the present invention and in which different exemplary structures, systems and steps that can implement multiple aspects of the present invention are shown by way of example. It should be understood that other specific schemes of components, structures, exemplary devices, systems and steps can be used, and structural and functional modifications can be made without departing from the scope of the present invention. Moreover, although the terms "above", "between", "within", etc. may be used in this specification to describe different exemplary features and elements of the present invention, these terms are used herein only for convenience, such as according to the direction of the examples described in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of the structure to fall within the scope of the present invention.

[0047] See also Figure 1 , which is a representative three-dimensional schematic diagram of the valve structure proposed in the present invention. In this exemplary embodiment, the valve structure proposed in the present invention is described by taking the application of the stop valve as an example. It is easy for those skilled in the art to understand that in order to apply the relevant design of the present invention to other types of valves or flow control elements, various modifications, additions, substitutions, deletions or other changes are made to the specific embodiments described below, and these changes are still within the scope of the principle of the valve structure proposed in the present invention.

[0048] like Figure 1As shown, in one embodiment of the present invention, the valve structure provided by the present invention includes a valve body 100 and a nut 200. The valve body 100 has a joint 110, and the outer periphery of the joint 110 has an outer thread 111. The inner thread of the nut 200 is threadedly matched with the outer thread 111 of the joint 110. For example, the joint 110 can be used to connect with a pipeline, and the nut 200 is used to connect the pipeline to the joint 110. Figures 2 to 10 , Figure 2 A partial exploded schematic diagram of the valve structure is representatively shown in FIG. Figure 3 A schematic plan view of the valve structure is representatively shown in FIG. Figure 4 A representative example is shown in Figure 3 A top view of Figure 5 The representative diagram shows the Figure 4 The cross-section made by the straight line AA in; Figure 6 A representative example is shown in Figure 5 An enlarged schematic diagram of part B in FIG. Figure 7 A three-dimensional structural schematic diagram of the identification flip sheet 300 is representatively shown in FIG. Figure 8 A schematic plan view of the identification flip sheet 300 is representatively shown in FIG. Fig. 9 The representative diagram shows the Figure 8 The cross-section made by the straight line CC in; Fig.10 1 is a representative plan view of the valve body 100. The structures, connection modes and functional relationships of the main components of the valve structure proposed by the present invention will be described in detail below in conjunction with the above drawings.

[0049] like Figures 1 to 6 As shown, in one embodiment of the present invention, an annular groove 112 is provided on the outer periphery of the connector 110, and the groove 112 is formed by being recessed inward from the outer surface of the connector 110 (e.g., the outer surface of the connector 110 in the circumferential direction), and is located on the side of the external thread 111 away from the nut 200, that is, the external thread 111 is located between the end of the connector 110 and the groove 112. On this basis, the valve structure proposed in the present invention also includes an identification flip plate 300, and the identification flip plate 300 is a conical ring structure. The so-called conical ring structure can be understood as the shape of the identification flip plate 300 matching the conical surface of a frustum structure (e.g., a circular frustum structure). The identification flip plate 300 is sleeved on the outer periphery of the connector 110, and the inner periphery of the identification flip plate 300 is clamped in the groove 112. Among them, the identification flip plate 300 can be transformed between a first state and a second state. In the first state, the identification flip plate 300 is inclined toward the side of the nut 200 (see Fig.17 In the second state, the identification flip sheet 300 is tilted away from the nut 200 (see Figures 3 to 6). Accordingly, in the process of tightening the nut 200 onto the joint 110, the valve structure proposed by the present invention will press against the identification flip sheet 300 when the nut 200 is assembled in place, causing the identification flip sheet 300 to flip from the first state to the second state. Through the above design, the present invention can utilize the morphological changes of the identification flip sheet 300 in different states, and the operator can identify it only by touching it, and then judge whether the nut 200 is assembled in place. In addition, the present invention can realize the fool-proof function of the nut 200 being assembled in place without visual inspection, so it is particularly suitable for assembly scenarios when the assembly position of the valve structure is not convenient for visual observation, which is conducive to ensuring the accuracy of assembly, avoiding poor assembly of the nut 200, and ensuring the functional stability and safety of the equipment. In addition, in the assembly scenario where it can be visually observed, the present invention can also more intuitively identify the direction of the flip sheet 300 by visual observation to judge whether the nut 200 is assembled in place.

[0050] like Figure 7 and Figure 8 As shown, in one embodiment of the present invention, an opening 310 may be provided on the inner circumference of the identification flip sheet 300. Through the above design, the present invention can facilitate the deformation of the identification flip sheet 300 by using the setting of the opening 310, thereby making it easier for the identification flip sheet 300 to switch between the first state and the second state. At the same time, since the opening 310 can disperse stress when the identification flip sheet 300 is deformed, it can alleviate or avoid structural damage to the identification flip sheet 300 caused by the morphological transformation. In addition, as Fig.14 As shown, in some embodiments, when the inner diameter of the identification flip sheet 300 is smaller than the outer diameter of the outer edge of the external thread 111, the setting of the opening 310 can also make the identification flip sheet 300 deform in the process of being inserted into the joint 110, so as to adapt to the assembly between components of different sizes, making the assembly of the identification flip sheet 300 more convenient and labor-saving, and helping to protect the structure of the identification flip sheet 300 from being squeezed and damaged by the external thread 111 during assembly. In some embodiments, the inner periphery of the identification flip sheet 300 may not have an opening 310, for example, it may be a complete inner edge shape, which is not limited to this embodiment.

[0051] like Figure 7 and Figure 8As shown, based on the design that the inner circumference of the identification flip sheet 300 is provided with an opening 310, in one embodiment of the present invention, the inner circumference of the identification flip sheet 300 may be provided with at least two openings 310, such as but not limited to the eight openings 310 shown in the accompanying drawings, and these openings 310 are arranged at intervals along the circumference of the inner circumference of the identification flip sheet 300, and may further be arranged at intervals. Through the above structural design, the present invention can make the morphological transformation of the identification flip sheet 300 more convenient, further avoid structural damage, and further facilitate the assembly of the identification flip sheet 300 itself, and can also make the deformation of the inner circumference of the identification flip sheet 300 more uniform, further improving the assembly effect of the identification flip sheet 300. In some embodiments, the inner circumference of the identification flip sheet 300 may also be provided with an opening 310, which is not limited to this embodiment.

[0052] like Figures 3 to 6 As shown, in one embodiment of the present invention, the outer diameter of the identification flip sheet 300 can be greater than the outer diameter of the nut 200. It should be noted that the outer diameter of the identification flip sheet 300 can be understood as the outer diameter of the identification flip sheet 300 in the first state or in the second state. In addition, the outer diameter of the nut 200 can be understood as the outer diameter of the nut 200 at the smallest size. For example, taking the outer contour of the nut 200 as a hexagon (that is, the nut 200 adopts a hexagonal structure) as an example, the outer diameter can be understood as the distance between the two opposite sides of the nut 200, rather than the distance between the two opposite corners of the nut 200. Through the above design, the present invention can facilitate the outer periphery of the identification flip sheet 300 to at least partially radially exceed the outer periphery of the nut 200 after the nut 200 is assembled, thereby facilitating the operator to touch and identify, and further improving the convenience and accuracy of the assembly detection.

[0053] In one embodiment of the present invention, the inner diameter of the identification flip sheet 300 may be smaller than the outer diameter of the external thread 111. With the above design, when the identification flip sheet 300 passes through the external thread 111 and moves to the card slot 112, it can ensure that the inner periphery of the identification flip sheet 300 is inserted into the card slot 112, ensuring the relative position limitation of the identification flip sheet 300 and the connector 110 along the axial direction, and preventing the identification flip sheet 300 from moving on the connector 110 due to the inner diameter being too large, thereby affecting touch recognition.

[0054] like Fig. 9 As shown, in one embodiment of the present invention, the inclination angle α of the corresponding conical surface of the identification flip sheet 300 can be greater than or equal to 30° and less than 90°, such as 30°, 35°, 45°, 60°, 75°, 85°, 89°, etc. It should be noted that the inclination angle α refers to the inclination angle of the identification flip sheet 300 at Fig. 9 The relative inclination angle between the oblique side of one side of the cross-sectional diagram and the axial direction, in other words, the identification of the flip sheet 300 in Fig. 9 The relative inclination angle between the two oblique sides in the cross-sectional figure shown is twice the above-mentioned inclination angle α, that is, greater than or equal to 60° and less than 180°. Through the above-mentioned design, the present invention can avoid the inclination angle α of the corresponding conical surface of the identification flip sheet 300 being too small, thereby avoiding the difficulty of deformation of the identification flip sheet 300 due to the inclination angle α. At the same time, the present invention can avoid the inclination angle α of the corresponding conical surface of the identification flip sheet 300 being 90° (that is, a planar annular structure cannot form a conical annular structure). In some embodiments, the inclination angle α of the corresponding conical surface of the identification flip sheet 300 may also be less than 30°, for example, 29.5°, etc., and is not limited to this embodiment.

[0055] like Fig.10 As shown, in one embodiment of the present invention, the cross-sectional shape of the card slot 112 may be an inverted trapezoid, and the inclination angle β of the slot wall of the card slot 112 may be greater than 0 and less than or equal to 60°, such as 1°, 15°, 30°, 45°, 60°, etc. It should be noted that the inclination angle β refers to the relative inclination angle between the slot wall on one side of the card slot 112 and the radial direction of the connector 110. In other words, the relative inclination angle between the slot walls on both sides of the card slot 112 is twice the above inclination angle β, that is, greater than 0 and less than or equal to 120°.

[0056] like Figure 5 As shown, in one embodiment of the present invention, still taking the cross-sectional shape of the card slot 112 as an inverted trapezoid as an example, the inclination angle β of the slot wall of the card slot 112 can be equal to the inclination angle α of the corresponding conical surface of the identification flip sheet 300. On this basis, in the first state, a side surface portion of the identification flip sheet 300 abuts against a side slot wall of the card slot 112, and in the second state, a side surface portion of the identification flip sheet 300 abuts against the other side slot wall of the card slot 112. Through the above design, the present invention can make the identification flip sheet 300 partially abut against the slot wall of the card slot 112 when it is in the first state and in the second state, thereby facilitating the use of the slot wall of the card slot 112 to limit the inclination angle of the identification flip sheet 300, so that the identification flip sheet 300 can maintain the structural form in different states.

[0057] As mentioned above, see Fig.11 , Fig.11 A schematic diagram of the structural design of the valve structure is representatively shown in FIG. In the specific design process of the valve structure proposed in the present invention, the following ideas can be specifically adopted for calculation and design for the above-mentioned inclination angle α and inclination angle β:

[0058] like Fig.11As shown, the size specifications in the attached drawings are marked as follows: d1: the distance from the nut 200 being touched by hand to the nut 200 being tightened to the bottom; d2: the distance from the nut 200 being touched by hand to the identification flip sheet 300 to the bottom of the slot 112; d3: the diameter of the joint 110 at the bottom of the slot 112; d4: the distance between the two opposite sides of the nut 200, taking the nut 200 as a hexagonal nut 200 as an example; d5: the radial distance between the contact point between the identification flip sheet 300 and the nut 200 and the bottom of the slot 112; d6: γ: the inclination angle of the slot wall of the slot 112 (i.e., the supplementary angle of the above-mentioned inclination angle β). Accordingly, in order to ensure the effective use of the touch identification flip sheet 300, it is required that d1 = d2, d5 = (d4-d3) / 2. According to the known two sides of the right triangle and the length of the right angle, the angle of any angle of the triangle can be calculated, that is, according to the formula tand = d5 / d1, the appropriate inclination angle of the slot wall can be calculated.

[0059] In one embodiment of the present invention, the material of the identification flip sheet 300 can be an elastic insulating material, such as but not limited to plastic. Through the above design, the present invention can facilitate the identification flip sheet 300 to realize the conversion between different states, while ensuring the insulation performance of the valve structure.

[0060] It should be noted that the valve structures shown in the drawings and described in this specification are only a few examples of the many valve structures that can adopt the principles of the present invention. It should be clearly understood that the principles of the present invention are by no means limited to any details or any components of the valve structures shown in the drawings or described in this specification.

[0061] Based on the above detailed description of several exemplary embodiments of the valve structure proposed in the present invention, an exemplary embodiment of the nut assembly method proposed in the present invention will be described below.

[0062] See also Fig.12 , which representatively shows the process flow chart of the nut assembly method proposed in the present invention. In this exemplary embodiment, the nut assembly method proposed in the present invention is described by taking the application to a stop valve as an example. It is easy for those skilled in the art to understand that in order to apply the relevant design of the present invention to other types of valves or flow control elements, various modifications, additions, substitutions, deletions or other changes are made to the specific embodiments described below, and these changes are still within the scope of the principle of the nut assembly method proposed in the present invention.

[0063] Related References Figures 13 to 17 , Figures 13 to 17 The valve structure is shown representatively in Fig.12The structural schematic diagrams of several steps of the nut assembly method are shown. The following will be combined with the above-mentioned drawings to describe in detail the processes and interrelationships of the main constituent steps of the nut assembly method proposed by the present invention.

[0064] In one embodiment of the present invention, the nut assembly method proposed in the present invention is used to assemble the nut 200 in the valve structure. It should be noted that the valve structure shown in the accompanying drawings is taken as an example of the valve structure proposed in the present invention and described in detail in the above embodiment. In other embodiments of the present invention, the nut assembly method proposed in the present invention can also be applied to the assembly of the nut 200 of any other valve structure having the following structural features: For example, the valve structure includes a valve body 100, the valve body 100 has a joint 110, the outer periphery of the joint 110 has an external thread 111, the internal thread of the nut 200 is threadedly matched with the external thread 111 of the joint 110, and the outer periphery of the joint 110 is provided with an annular groove 112, the groove 112 is formed by being recessed inward from the outer surface of the joint 110, and is located on the side of the external thread 111 away from the nut 200. In addition, the valve structure also includes an identification flip sheet 300, which is a conical ring structure.

[0065] On this basis, if Fig.12 As shown, the nut assembly method proposed by the present invention includes:

[0066] Step S1: The identification flip sheet 300 is placed on the connector 110 and moved toward the card slot 112 (eg, Fig.13 and Fig.14 ), until the inner periphery of the identification flip sheet 300 is inserted into the card slot 112, the identification flip sheet 300 is in the second state (as shown) during the above process. Fig.15 As shown), in the second state, the identification flip sheet 300 is tilted toward one side of the moving direction;

[0067] Step S2: Flip the identification flip sheet 300 to convert the identification flip sheet 300 into the first state (eg Fig.16 As shown), in the first state, the identification flip sheet 300 is tilted toward one side of the end of the connector 110;

[0068] Step S3: The nut 200 is screwed onto the connector 110. The nut 200 moves toward the identification flip sheet 300 during the screwing process (eg, Fig.17 When the nut 200 is tightened, it presses against the identification flip sheet 300, causing the identification flip sheet 300 to flip from the first state to the second state (as shown in FIG. Figure 3 As shown), the operator can touch and identify whether the flip sheet 300 is in the second state to confirm whether the nut 200 is assembled in place.

[0069] It should be noted that the nut assembly methods shown in the drawings and described in this specification are only a few examples of many assembly methods that can adopt the principles of the present invention. It should be clearly understood that the principles of the present invention are by no means limited to any details or any steps of the nut assembly method shown in the drawings or described in this specification.

[0070] In summary, the valve structure proposed in the present invention is provided with an annular card slot 112 on the outer periphery of the connector 110, and an identification flip sheet 300 with a conical ring structure is sleeved on the connector 110, and the inner periphery of the identification flip sheet 300 is carded in the card slot 112. The identification flip sheet 300 can be transformed between a first state and a second state. In the first state, the identification flip sheet 300 is tilted toward the side of the nut 200, and in the second state, the identification flip sheet 300 is tilted away from the side of the nut 200. Accordingly, during the tightening process of the nut 200 on the connector 110, the nut 200 presses against the identification flip sheet 300 to flip the identification flip sheet 300 from the first state to the second state. Through the above design, the present invention can utilize the shape change of the identification flip sheet 300 in different states, and the operator can identify it only by touching it, and then judge whether the nut 200 is assembled in place. Furthermore, the present invention can realize the fool-proof function of assembling the nut 200 in place without visual inspection, and is therefore particularly suitable for assembly scenarios when the assembly position of the valve structure is not convenient for visual observation, which is beneficial to ensuring the accuracy of assembly, avoiding poor assembly of the nut 200, and ensuring the functional stability and safety of the equipment.

[0071] The exemplary embodiments of the valve structure and nut assembly method proposed by the present invention are described and / or illustrated in detail above. However, the embodiments of the present invention are not limited to the specific embodiments described herein. On the contrary, the components and / or steps of each embodiment can be used independently and separately from other components and / or steps described herein. Each component and / or each step of an embodiment can also be used in combination with other components and / or steps of other embodiments. When introducing the elements / components / etc. described and / or illustrated herein, the terms "one", "one" and "above" are used to indicate the presence of one or more elements / components / etc. The terms "comprising", "including" and "having" are used to indicate the meaning of open inclusion and mean that in addition to the listed elements / components / etc., there may be other elements / components / etc. In addition, the terms "first" and "second" in the claims and the specification are used only as marks, not numerical restrictions or order restrictions on their objects.

[0072] Although the valve structure and nut assembly method proposed by the present invention have been described according to different specific embodiments, those skilled in the art will recognize that the implementation of the present invention can be modified within the spirit and scope of the claims.

Claims

1. A valve structure, comprising a valve body and a nut, wherein the valve body has a joint, the outer periphery of the joint has an external thread, and the internal thread of the nut is threadedly engaged with the external thread of the joint; wherein: An annular groove is formed on the outer periphery of the joint, the groove is formed by being recessed inward from the outer surface of the joint and is located on a side of the external thread away from the nut; The valve structure further includes an identification flip sheet, which is in a conical ring structure and is sleeved on the outer periphery of the joint, and the inner periphery of the identification flip sheet is clamped in the clamping groove, and the identification flip sheet can be transformed between a first state and a second state. In the first state, the identification flip sheet is tilted toward one side of the nut, and in the second state, the identification flip sheet is tilted away from the nut. Wherein, the valve structure is configured such that: during the process of tightening the nut on the joint, the nut presses against the identification flip sheet to flip the identification flip sheet from the first state to the second state.

2. The valve structure according to claim 1, wherein: An opening is formed on the inner periphery of the identification flip sheet.

3. The valve structure according to claim 2, wherein: At least two openings are formed on the inner circumference of the identification flip sheet, and the at least two openings are arranged at intervals along the circumferential direction of the inner circumference of the identification flip sheet.

4. The valve structure according to claim 1, wherein: The outer diameter of the identification flip sheet is greater than the outer diameter of the nut.

5. The valve structure according to claim 1, wherein: The inner diameter of the identification flip sheet is smaller than the outer diameter of the external thread.

6. The valve structure according to claim 1, wherein: The inclination angle of the corresponding conical surface of the identification flip sheet is greater than or equal to 30° and less than 90°.

7. The valve structure according to claim 1, wherein: The cross-sectional shape of the card slot is an inverted trapezoid, and the inclination angle of the card slot wall is greater than 0 and less than or equal to 60°.

8. The valve structure according to claim 1, wherein: The cross-sectional shape of the card slot is an inverted trapezoid, and the inclination angle of the card slot wall is equal to the inclination angle of the corresponding conical surface of the identification flip sheet; wherein, in a first state, a surface portion of one side of the identification flip sheet abuts against a surface portion of one side of the card slot, and in a second state, a surface portion of the other side of the identification flip sheet abuts against a surface portion of the other side of the card slot.

9. The valve structure according to claim 1, wherein: The identification flip sheet is made of elastic insulating material.

10. A nut assembly method, used for assembling a nut in a valve structure, the valve structure comprising a valve body, the valve body having a joint, the outer periphery of the joint having an external thread, the inner thread of the nut being threadedly matched with the external thread of the joint, the outer periphery of the joint being provided with an annular groove, the groove being recessed inwardly from the outer surface of the joint and being located on a side of the external thread away from the nut, the valve structure further comprising an identification flip sheet, the identification flip sheet being a conical ring structure; wherein, The nut assembly method comprises: The identification flip sheet is sleeved on the joint and moved toward the card slot until the inner periphery of the identification flip sheet is inserted into the card slot. The identification flip sheet is in a second state during the above process. In the second state, the identification flip sheet is tilted toward one side of the moving direction. Flipping the identification flip sheet to convert the identification flip sheet into a first state, in which the identification flip sheet is tilted toward one side of the joint end; The nut is screwed onto the joint. The nut moves toward the identification flip piece during the screwing-in process. When the nut is tightened, it presses against the identification flip piece to flip the identification flip piece from a first state to a second state, so that the operator can touch the identification flip piece to confirm whether the nut is in place.

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