Valve

Abstract

The valve comprises a valve shell and a valve rod, the valve shell comprises a main body part and a first limiting part, the main body part comprises a flow channel, the first limiting part is connected to the inner wall face of the flow channel, the valve rod can move along the axis of the valve rod and rotate around the axis of the valve rod, and the valve rod comprises a plugging part and a second limiting part which are fixed to each other. The peripheral surface of the second limiting part comprises a first surface and a second surface, a limiting groove is formed in the first surface, and the inner wall surface of the limiting groove comprises a circumferential limiting surface and two axial limiting surfaces; the second surface and the circumferential limiting surface can abut against the first limiting part so as to prevent the valve rod from rotating; when the second surface abuts against the first limiting part, the valve rod can move. When the circumferential limiting face abuts against the first limiting part, the axial limiting face blocks the valve rod from moving. According to the valve, a user can conveniently determine whether the current valve rod can move or not, the use convenience of the valve is high, and the use experience is good.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid transportation, in particular to a valve. Background Art

[0002] Valves are commonly used to control the flow of fluids. Some existing valves have a valve stem that the user can pull or press to change the valve's state. Furthermore, after the user pulls the valve stem to a certain position, the user can rotate the stem, causing a retaining structure inside the valve to engage with the stem. This retaining structure then blocks movement of the stem, thereby maintaining the valve in an open or closed state.

[0003] To switch the state of the valve again, the user needs to first release the limiting cooperation between the limiting structure and the valve stem. However, the limiting structure is usually located inside the flow channel of the valve, and the user cannot observe the cooperation relationship between the limiting structure and the valve stem, and thus cannot accurately judge whether the valve stem can be pulled or pushed at this time. The user needs to try to pull or push the valve stem after turning the valve stem to a certain angle to judge whether the valve stem can move. This is accompanied by a large degree of randomness. The user may not be able to pull the valve stem smoothly after turning the valve stem many times and trying to pull the valve stem many times. Therefore, the valve in the above-mentioned prior art is inconvenient to use, and the user experience of the valve is poor. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems in the prior art. To this end, the present invention provides a valve that is easy to use and provides a good user experience.

[0005] The valve according to the embodiment of the utility model comprises: a valve housing, comprising a main body and a first limiting portion, the main body comprising a flow channel, the flow channel comprising an inlet, an outlet and a through port, the through port being arranged between the inlet and the outlet, the first limiting portion being connected to the inner wall surface of the flow channel and protruding relative to the inner wall surface of the flow channel; a valve stem, the valve stem being movably connected to the valve housing, the valve stem being able to move along its own axis and rotate around its own axis, the valve stem comprising a blocking portion and a second limiting portion fixed to each other, the blocking portion and the second limiting portion being both arranged in the flow channel, the blocking portion being used to block the through port, the outer circumferential surface of the second limiting portion comprising a first surface and a second surface, the first surface being connected to the second ends of the second surface in the circumferential direction at both ends of the valve stem respectively, the first surface being provided with a limiting groove, the The limiting groove is formed with an opening at one end in the circumferential direction, and the opening is located on the second surface. The inner wall surface of the limiting groove includes a circumferential limiting surface and two axial limiting surfaces. The circumferential limiting surface and the opening are respectively located at the two ends of the limiting groove in the circumferential direction, and the two axial limiting surfaces are distributed at intervals along the axial direction of the valve stem; the second surface can abut against the first limiting part to prevent the valve stem from rotating in a first direction, and the circumferential limiting surface can abut against the first limiting part to prevent the valve stem from rotating in a second direction, and the first direction and the second direction are opposite; and, when the second surface abuts against the first limiting part, the first limiting part is located outside the limiting groove, and the valve stem can move; when the circumferential limiting surface abuts against the first limiting part, the first limiting part is located in the limiting groove, and the axial limiting surface prevents the valve stem from moving.

[0006] The valve according to the embodiment of the present invention has at least the following beneficial effects: after the first limiting portion abuts against the circumferential limiting surface, the user can no longer rotate the valve stem in the second direction. The user can now determine that the first limiting portion is located in the limiting groove and the valve stem cannot move axially. After the first limiting portion abuts against the second surface, the user can no longer rotate the valve stem in the first direction. The user can now determine that the first limiting portion is located outside the limiting groove, the valve stem is no longer blocked by the axial limiting surface, and the valve stem can move. Therefore, when the valve stem is rotated to the extreme position, the user can determine whether the valve stem is located outside or inside the limiting groove, thereby determining whether the valve stem can move in the current state. This valve makes it easy for the user to determine whether the current valve stem can move. The valve is highly convenient to use and provides a good user experience.

[0007] According to some embodiments of the present invention, the first surface is provided with two limiting grooves, and the two limiting grooves are distributed at intervals along the axial direction of the valve stem, and the two limiting grooves are respectively a first limiting groove and a second limiting groove; when the first limiting portion is located in the first limiting groove, the axial limiting surface of the first limiting groove can abut against the first limiting portion to hinder the movement of the valve stem, and the blocking portion blocks the through port to separate the inlet and the outlet; when the second limiting portion is located in the second limiting groove, the axial limiting surface of the second limiting groove can abut against the first limiting portion to hinder the movement of the valve stem, the blocking portion is spaced apart from the through port, and the inlet, the through port and the outlet are connected in sequence.

[0008] According to some embodiments of the present invention, the first surface is an arc surface, the second surface is a plane, and a normal of the second surface is perpendicular to the axis.

[0009] According to some embodiments of the present invention, the inner wall surface of the limiting groove also includes a groove bottom surface, and in the radial direction of the valve stem, the groove bottom surface is located at one end of the limiting groove close to the axis; the groove bottom surface is an arc surface, and the two ends of the groove bottom surface in the circumferential direction are respectively connected to the second surface and the circumferential limiting surface.

[0010] According to some embodiments of the present invention, the central angle corresponding to the bottom surface of the groove is A, and 0<A≤120°.

[0011] According to some embodiments of the present invention, the distance between the first surface and the axis is L1, the distance between the first limiting portion and the axis is L2, the distance between the bottom surface of the groove and the axis is L3, and the distance between the second surface and the axis is L4, and L1 to L4 satisfy: L4=L3; and / or, L3<L2; and / or, L2<L1.

[0012] According to some embodiments of the present invention, the first limiting portion is in a cube shape.

[0013] According to some embodiments of the present invention, when the sealing portion is spaced apart from the through-portion, a first gap is formed between the outer surface of the sealing portion and the inner wall surface of the flow channel, and a second gap is formed between the outer surface of the second limiting portion and the inner wall surface of the flow channel, and the fluid in the flow channel flows along the first gap and the second gap.

[0014] According to some embodiments of the present invention, the valve further includes a handle, the valve stem further includes an extension portion, the extension portion and the sealing portion are respectively connected to the two ends of the second limiting portion, the handle and the extension portion are arranged on the outside of the valve housing, the handle is arranged on the outside of the extension portion, and the handle is fixedly connected to the extension portion.

[0015] According to some embodiments of the present invention, the orientation of the inlet and the orientation of the outlet are perpendicular to each other.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0018] Figure 1 A perspective view of a utility model according to an embodiment of the present utility model;

[0019] Figure 2 for Figure 1 Exploded view of the valve shown;

[0020] Figure 3 is a cross-sectional view of the valve housing;

[0021] Figure 4 is a schematic diagram of the valve stem;

[0022] Figure 5 is a cross-sectional view of the valve when the first limiting portion is not disposed in the first limiting groove (the valve is in a closed state);

[0023] Figure 6 Schematic diagram of the valve when the first limiting portion is arranged in the first limiting groove (the valve is in a closed state);

[0024] Figure 7 is a cross-sectional view of the valve when the first limiting portion is not disposed in the second limiting groove (the valve is in an open state);

[0025] Figure 8 This is a cross-sectional view of the valve when the first limiting portion is arranged in the second limiting groove (the valve is in the open state);

[0026] Figure 9 is a cross-sectional view of the valve when the first limiting portion abuts against the circumferential limiting surface;

[0027] Figure 10 It is a cross-sectional view of the valve when the first limiting portion abuts against the second surface.

[0028] Figure markings: 100-valve, 101-valve body, 102-inlet, 103-outlet, 104-handle, 105-valve stem, 106-first sealing ring, 107-second sealing ring, 108-through hole, 109-main body, 110-flow channel, 111-first limiting portion, 112-through port, 113-blocking portion, 114-second limiting portion, 115-extending portion, 116-external thread, 117-first surface, 118-second surface, 119-limiting groove, 120-first limiting groove, 121-second limiting groove, 122-internal thread, 123-axis, 124-first gap, 125-second gap, 126-groove bottom surface, 127-circumferential limiting surface, 128-opening, 129-axial limiting surface. DETAILED DESCRIPTION

[0029] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0030] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0031] In the description of this utility model, "several" means more than one, "plurality" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of the terms "first" and "second" is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0032] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0033] Figures 1 to 2 FIG. 1 shows a valve 100 according to an embodiment of the present invention. The valve 100 includes a valve housing and a valve stem 105. The valve stem 105 is movably connected to the valve housing. The valve stem 105 can move along its own axis 123 (axis 123 is shown in FIG. 1 ). Figure 4As shown in FIG, the valve stem 105 can move, and the valve stem 105 can also rotate around its own axis 123. In the present invention, whether it is the movement of the valve stem 105 or the rotation of the valve stem 105, both refer to the movement of the valve stem 105 relative to the valve housing.

[0034] like Figure 3 As shown, the valve housing includes a main body 109 and a first limiting portion 111. The main body 109 includes a flow channel 110, and the flow channel 110 includes an inlet 102, an outlet 103 and a through port 112, and the through port 112 is arranged between the inlet 102 and the outlet 103. Fluid (such as gas, liquid) can enter the flow channel 110 from the inlet 102 and leave the flow channel 110 from the outlet 103. The first limiting portion 111 is connected to the inner wall surface of the flow channel 110 and protrudes relative to the inner wall surface of the flow channel 110. The first limiting portion 111 and the main body 109 can be integrally formed. The valve housing can be made of metal such as stainless steel and copper, or it can be made of plastic or other non-metallic materials.

[0035] like Figure 4 As shown, the valve stem 105 includes a blocking portion 113 and a second limiting portion 114 fixed to each other. Figure 5 As shown, the blocking portion 113 and the second limiting portion 114 are both arranged in the flow channel 110, and the blocking portion 113 is used to block the through port 112. Figure 4 As shown, the outer circumferential surface of the second limiting portion 114 includes a first surface 117 and a second surface 118. The two ends of the first surface 117 in the circumferential direction of the valve stem 105 are respectively connected to the two ends of the second surface 118 in the circumferential direction. The first surface 117 and the second surface 118 together surround the axis 123 of the valve stem 105. The first surface 117 is provided with a limiting groove 119. The limiting groove 119 is formed with an opening at one end in the circumferential direction. The opening is located on the second surface 118. The inner wall surface of the limiting groove 119 includes a circumferential limiting surface 127 and two axial limiting surfaces 129. The circumferential limiting surface 127 and the opening are respectively located at the two ends of the limiting groove 119 in the circumferential direction (as shown in FIG. Figure 9 As shown), the two axial limiting surfaces 129 are spaced apart along the axial direction of the valve stem 105 (as shown Figure 6 or Figure 8 ), and is used to hinder the valve stem 105 from moving axially.

[0036] like Figure 10 As shown, the second surface 118 can abut against the first limiting portion 111, thereby preventing the valve stem 105 from rotating in the first direction. Figure 9 As shown, the circumferential limiting surface 127 can abut against the first limiting portion 111 to prevent the valve stem 105 from rotating in the second direction. The first direction and the second direction are opposite, for example, the first direction is counterclockwise (such as Figure 10 ), the second direction is clockwise (as shown Figure 9 shown).

[0037] And, as Figure 10 As shown, when the second surface 118 abuts against the first limiting portion 111, the first limiting portion 111 is located outside the limiting groove 119; at this time, the axial limiting surface 129 ( Figure 10 (not shown) cannot contact the first limiting portion 111, and the valve stem 105 can move. Figure 9 As shown, when the circumferential limiting surface 127 abuts against the first limiting portion 111, the first limiting portion 111 is located in the limiting groove 119, and the axial limiting surface 129 ( Figure 9 ) can hinder the movement of the valve stem 105.

[0038] When the user needs to fix the axial position of the valve stem 105, the user can rotate the valve stem 105 in the second direction until the first limiting portion 111 abuts the circumferential limiting surface 127. After the first limiting portion 111 abuts the circumferential limiting surface 127, the user can no longer rotate the valve stem 105 in the second direction. The user can now determine that the first limiting portion 111 is located within the limiting groove 119 and the valve stem 105 cannot move axially. Therefore, after the first limiting portion 111 abuts the circumferential limiting surface 127, the user can release the valve stem 105 without having to push or pull the valve stem 105 axially to determine whether the valve stem 105 can be fixed in the axial direction.

[0039] Similarly, when the user needs to change the axial position of the valve stem 105, the user can rotate the valve stem 105 in the first direction until the first stop portion 111 abuts the second surface 118. After the first stop portion 111 abuts the second surface 118, the user can no longer rotate the valve stem 105 in the first direction. The user can now confirm that the first stop portion 111 is outside the stop slot 119, and the valve stem 105 is no longer blocked by the axial stop surface 129, allowing the valve stem 105 to move. Therefore, after the first stop portion 111 abuts the second surface 118, the user can directly pull or push the valve stem 105.

[0040] In summary, when the user rotates the valve stem 105 to the limit position, the user can determine whether the valve stem 105 is located outside or inside the limit groove 119, thereby determining whether the valve stem 105 is movable in the current state. The valve 100 facilitates the user to determine whether the valve stem 105 is currently movable, and the valve 100 is highly convenient to use and provides a good user experience.

[0041] like Figure 2 As shown, in some embodiments, the first surface 117 is provided with two limiting grooves 119, which are spaced apart along the axial direction of the valve stem 105, and the two limiting grooves 119 are respectively a first limiting groove 120 and a second limiting groove 121. Figure 6 As shown, when the first limiting portion 111 is located in the first limiting groove 120, the axial limiting surface 129 of the first limiting groove 120 can abut against the first limiting portion 111 to prevent the valve stem 105 from moving, and the blocking portion 113 blocks the through port 112 to separate the inlet 102 and the outlet 103. At this time, the fluid cannot pass through the valve 100. Figure 8 As shown, when the second limiting portion 114 is located in the second limiting groove 121, the axial limiting surface 129 of the second limiting groove 121 can abut against the first limiting portion 111 to prevent the valve stem 105 from moving. The blocking portion 113 is spaced apart from the through port 112, and the inlet 102, through port 112, and outlet 103 are sequentially connected. At this time, fluid can pass through the valve 100. Because the limiting groove 119 can prevent the movement of the valve stem 105, when two limiting grooves 119 are provided, the valve 100 can be maintained in both the open and closed states, and the user does not need to constantly hold the valve stem 105 to keep the valve 100 in the open or closed state.

[0042] Figures 5 to 8 The valve 100 is shown in different states. Figure 5 and Figure 6 In the state in which the valve 100 is closed, the fluid cannot pass through the valve 100. Figure 7 and Figure 8 In the embodiment, the valve 100 is in an open state and the fluid can pass through the valve 100. Figure 5 and Figure 6 In the embodiment, the axial position of the blocking portion 113 is the same; Figure 7 and Figure 8 In the embodiment, the axial position of the blocking portion 113 is also the same. Figure 5 and Figure 7 , the first limiting portion 111 does not enter the limiting groove 119 ( Figure 5 and Figure 7 Limiting slots not shown); Figure 6 and Figure 8 In the embodiment, the first limiting portion 111 is located in the limiting groove 119 .

[0043] The process of the user opening the valve 100 is as follows: First, the user rotates the valve stem 105 to disengage the first limiting portion 111 from the first limiting groove 120 (from the Figure 6 The displayed status switches to Figure 5 Subsequently, the user pushes or pulls the valve stem 105, causing the valve stem 105 to move and thereby release the blocking portion 113 from blocking the through port 112 (from Figure 5 The displayed status switches to Figure 7 Next, the user rotates the valve stem 105 again, so that the first limiting portion 111 enters the second limiting groove 121 (from Figure 7The displayed status switches to Figure 8 The process of the user closing the valve 100 is the opposite of the above process and will not be described here.

[0044] In some embodiments, to reduce the difficulty of manufacturing the valve stem 105, the first surface 117 is an arc surface, the second surface 118 is a plane, and the normal of the second surface 118 (the normal is not shown) is perpendicular to the axis 123. In some embodiments, to reduce the difficulty of manufacturing the first limiting portion 111, the first limiting portion 111 is in the shape of a cube. More specifically, the first limiting portion 111 can be configured as a cuboid or a cube. It should be noted that, in other embodiments, the second surface 118 can also be configured as a curved surface (in this case, the curvature of the second surface 118 is different from the curvature of the first surface 117), and the first limiting portion 111 can also be configured as a sphere, cylinder, cone, or other shape, as long as the second surface 118 can abut against the first limiting portion 111 and prevent the valve stem 105 from rotating.

[0045] In some embodiments, the inner wall surface of the limiting groove 119 further includes a groove bottom surface 126. In the radial direction of the valve stem 105, the groove bottom surface 126 is located at the end of the limiting groove 119 close to the axis 123. The groove bottom surface 126 is an arc surface, and its two circumferential ends are connected to the second surface 118 and the circumferential limiting surface 127, respectively. The groove bottom surface 126 and the second surface 118 can be tangent, and the groove bottom surface 126 and the circumferential limiting surface 127 can be perpendicular to each other. Because the groove bottom surface 126 is an arc surface, during the rotation of the valve stem 105, the groove bottom surface 126 is not easily stuck with the first limiting portion 111, and the rotation of the valve stem 105 is relatively smooth.

[0046] In some embodiments, as Figure 10 As shown, the angle of the central angle corresponding to the bottom surface 126 of the groove is A, 0<A≤120°. It should be noted that the center of the central angle is located on the axis 123. Figure 9 and Figure 10 In the figure, point B is the position of axis 123. Since A≤120°, when the user rotates the valve stem 105 to move the first limiting portion 111 into and out of the limiting groove 119, the user does not need to rotate the valve stem 105 by a large angle, which helps to reduce the range of the user's hand rotation and improve the convenience and user experience of the valve 100.

[0047] like Figure 9As shown, in some embodiments, the distance between the first surface 117 and the axis 123 is L1, the distance between the first limiting portion 111 and the axis 123 is L2, the distance between the groove bottom surface 126 and the axis 123 is L3, and the distance between the second surface 118 and the axis 123 is L4, and L1 to L4 satisfy: L4=L3; and / or, L3<L2; and / or, L2<L1. When the groove bottom surface 126 is tangent to the second surface 118, L4=L3. Since L4=L3, during the rotation of the valve stem 105, the first limiting portion 111 can be transferred between the groove bottom surface 126 and the second surface 118 relatively smoothly. Figure 9 In the embodiment, L3 < L2. Thus, when the first limiting portion 111 is located within the limiting groove 119, the first limiting portion 111 is spaced apart from the groove bottom surface 126. There is no friction between the groove bottom surface 126 and the first limiting portion 111, and the rotational resistance of the valve stem 105 is low. Because the inner and outer ends of the circumferential limiting surface 127 are connected to the groove bottom surface 126 and the first surface 117, respectively, L2 < L1 ensures that the first limiting portion 111 can abut against the circumferential limiting surface 127.

[0048] In some embodiments, when the blocking portion 113 is spaced apart from the through port 112 (e.g. Figure 7 and Figure 8 As shown), a first gap 124 is formed between the outer surface of the sealing portion 113 and the inner wall surface of the flow channel 110, and a second gap 125 is formed between the outer surface of the second limiting portion 114 and the inner wall surface of the flow channel 110, and the fluid in the flow channel 110 flows along the first gap 124 and the second gap 125.

[0049] In some prior art valves, the valve stem 105 is hollow, with the end of the valve stem 105 away from the inlet 102 connected to a pipe. Fluid enters the valve stem 105 and then exits the pipe. However, because the valve stem 105 is connected to the pipe, movement of the valve stem 105 synchronizes with the pipe, potentially pulling the pipe (especially if the pipe is a flexible tube). Furthermore, if the space within which the valve 100 is located is small, the pipe may be difficult to move, hindering movement of the valve stem 105.

[0050] And for Figure 7 and Figure 8 In the valve 100 of the present invention, the valve stem 105 does not require a fluid passageway, resulting in a less complex and difficult to manufacture valve stem 105. Furthermore, compared to the prior art, the end of the valve stem 105 away from the inlet 102 does not need to be connected to a pipeline. Therefore, the movement of the valve stem 105 does not require overcoming the resistance of gravity in the pipeline, resulting in less resistance to the movement of the valve stem 105. The movement of the valve stem 105 is also not hindered by the confined space within which the valve 100 is located.

[0051] In this embodiment, the orientation of the inlet 102 and the orientation of the outlet 103 are perpendicular to each other. Figure 8 Inlet 102 is positioned to the left, and outlet 103 is positioned downward. The directions of inlet 102 and outlet 103 are perpendicular to each other. In this case, valve 100 is used as an angle valve. Inlet 102 can be connected to one pipe, and outlet 103 can be connected to another pipe. Valve 100 is used to connect two perpendicular pipes and change the flow direction of a fluid.

[0052] like Figure 4 As shown, the valve stem 105 further includes an extension portion 115, and the extension portion 115 and the blocking portion 113 are respectively connected to the two ends of the second limiting portion 114. Figure 5 As shown, the valve 100 also includes a handle 104, and the handle 104 and the extension 115 are arranged on the outside of the valve housing, the handle 104 is sleeved on the outside of the extension 115, and the handle 104 is fixedly connected to the extension 115. In order to enable the extension 115 to extend, the valve housing is provided with a through hole 108, and the valve stem 105 is passed through the through hole 108. Since the handle 104 is sleeved on the outside of the extension 115, the outer diameter of the handle 104 is larger than the outer diameter of the extension 115, and the handle 104 can provide a larger gripping area for the user, which is convenient for the user to exert force when pulling or twisting the valve stem 105. In this embodiment, the handle 104 is cylindrical, and the handle 104 is equivalent to a knob; in other embodiments not shown in the figures, the handle 104 can also be set to other shapes. The handle 104 and the extension 115 can be fixed by means of a threaded connection. For example, the extension 115 is provided with an external thread 116 (such as Figure 4 As shown), the handle 104 is provided with an internal thread 122 (as Figure 2 As shown in FIG, the external thread 116 and the internal thread 122 engage with each other. In other embodiments, the handle 104 and the extension 115 can also be fixed by clamping, bonding, welding, screw connection, etc.

[0053] like Figure 2 As shown, in some embodiments, to enhance the sealing effect of the sealing portion 113 on the passage 112, the sealing portion 113 further includes a first sealing ring 106, the outer circumference of which is configured to abut against the inner wall of the flow channel 110. The valve 100 further includes a second sealing ring 107, which is mounted on the through hole 108 and the inner circumference of which is configured to abut against the valve stem 105 to prevent the fluid in the flow channel 110 from leaking out of the valve housing through the through hole 108.

[0054] In some embodiments, to facilitate the user's use of the valve 100, the outer surface of the handle 104 or the outer surface of the valve housing may be provided with a marking to indicate the first direction and the second direction. The marking may include an arrow, the text "first direction" and the text "second direction", etc. The marking may be a pattern sprayed on the handle 104 or the valve housing, or it may be a concave pattern directly formed on the handle 104 or the valve housing during the casting or injection molding process, and examples are not given here. When the marking is provided on the outer surface of the handle 104, the marking may be located on the outer peripheral surface of the handle 104, or on the end surface of the handle 104 facing away from the valve housing.

[0055] In the description of the present invention, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Claims

1. A valve, characterized in that include: The valve housing includes a main body and a first limiting portion, wherein the main body includes a flow channel, the flow channel includes an inlet, an outlet, and a through port, the through port being arranged between the inlet and the outlet, and the first limiting portion is connected to an inner wall surface of the flow channel and protrudes relative to the inner wall surface of the flow channel; The valve stem is movably connected to the valve housing, and the valve stem can move along its own axis and rotate around its own axis, and the valve stem includes a blocking portion and a second limiting portion fixed to each other, and the blocking portion and the second limiting portion are both arranged in the flow channel, and the blocking portion is used to block the through port, and the outer circumferential surface of the second limiting portion includes a first surface and a second surface, and the two ends of the first surface in the circumferential direction of the valve stem are respectively connected to the two ends of the second surface in the circumferential direction, and the first surface is provided with a limiting groove, and the limiting groove forms an opening at one end in the circumferential direction, and the opening is located on the second surface, and the inner wall surface of the limiting groove includes a circumferential limiting surface and two axial limiting surfaces, and the circumferential limiting surface and the opening are respectively located at the two ends of the limiting groove in the circumferential direction, and the two axial limiting surfaces are distributed at intervals along the axial direction of the valve stem; The second surface can abut against the first limiting portion to prevent the valve stem from rotating in a first direction, and the circumferential limiting surface can abut against the first limiting portion to prevent the valve stem from rotating in a second direction, the first direction and the second direction are opposite; and, when the second surface abuts against the first limiting portion, the first limiting portion is located outside the limiting groove, and the valve stem can move; when the circumferential limiting surface abuts against the first limiting portion, the first limiting portion is located in the limiting groove, and the axial limiting surface prevents the valve stem from moving.

2. The valve according to claim 1, characterized in that The first surface is provided with two limiting grooves, the two limiting grooves are spaced apart along the axial direction of the valve stem, and the two limiting grooves are respectively a first limiting groove and a second limiting groove; When the first limiting portion is located in the first limiting groove, the axial limiting surface of the first limiting groove can abut against the first limiting portion to prevent the valve stem from moving, and the blocking portion blocks the through port to separate the inlet and the outlet; When the second limiting portion is located in the second limiting groove, the axial limiting surface of the second limiting groove can abut against the first limiting portion to hinder the movement of the valve stem, the blocking portion is spaced apart from the through port, and the inlet, the through port and the outlet are connected in sequence.

3. The valve according to claim 1, characterized in that The first surface is an arc surface, the second surface is a plane, and a normal line of the second surface is perpendicular to the axis.

4. The valve according to claim 3, characterized in that The inner wall surface of the limiting groove also includes a groove bottom surface. In the radial direction of the valve stem, the groove bottom surface is located at one end of the limiting groove close to the axis; the groove bottom surface is an arc surface, and the two ends of the groove bottom surface in the circumferential direction are respectively connected to the second surface and the circumferential limiting surface.

5. The valve according to claim 4, characterized in that The central angle corresponding to the bottom surface of the groove is A, 0<A≤120°.

6. The valve according to claim 4, characterized in that The distance between the first surface and the axis is L1, the distance between the first limiting portion and the axis is L2, the distance between the bottom surface of the groove and the axis is L3, and the distance between the second surface and the axis is L4. L1 to L4 satisfy: L4=L3; and / or, L3 < L2; And / or, L2<L1.

7. The valve according to claim 3, characterized in that The first limiting portion is in a cube shape.

8. The valve according to claim 2, characterized in that When the blocking portion is spaced apart from the through port, a first gap is formed between the outer surface of the blocking portion and the inner wall surface of the flow channel, and a second gap is formed between the outer surface of the second limiting portion and the inner wall surface of the flow channel, and the fluid in the flow channel flows along the first gap and the second gap.

9. The valve according to claim 1, characterized in that The valve also includes a handle, and the valve stem also includes an extension portion. The extension portion and the sealing portion are respectively connected to the two ends of the second limiting portion. The handle and the extension portion are arranged on the outside of the valve housing, and the handle is provided on the outside of the extension portion, and the handle is fixedly connected to the extension portion.

10. The valve according to any one of claims 1 to 9, characterized in that The orientation of the inlet and the orientation of the outlet are perpendicular to each other.

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