Drain valve

Abstract

The utility model relates to the technical field of drainage devices, in particular to a drainage valve which comprises a tubular valve body, a locking nut and a plug, one end of the tubular valve body extends outwards in the radial direction to form a baffle ring, external threads are arranged on the outer surface of the tubular valve body, and the locking nut is connected with the external threads of the tubular valve body in a matched mode. An internal thread is arranged in the end, away from the baffle ring, of the tubular valve body, an external thread is arranged outside the plug, the external thread of the plug is connected with the internal thread of the tubular valve body in a matched mode, a connecting rod is arranged at the end, away from the handheld part, of the plug, and a limiting supporting rod is arranged at the end of the connecting rod. The limiting supporting rod is used for limiting the connecting rod from being pulled out of the tubular valve body. According to the utility model, the tubular valve body and the locking nut are mounted on the box body, meanwhile, the plug is used for sealing, the plug is connected with the tubular valve body through the connecting rod and the limiting support rod, and the plug cannot be completely separated from the tubular valve body in the drainage process, so that the loss cannot be caused, and the use performance is improved.

Description

Technical Field

[0001] This utility model relates to the field of drainage device technology, and in particular to a drainage valve. Background Technology

[0002] In existing technology, drain valves are required on some insulated boxes and other enclosures to drain internal water. Current drain valves typically consist of a valve body and a locking nut, forming a drain pipe structure with a plug inside for drainage or sealing. However, in practical use, because drainage takes time after the plug is removed, and the plug separates from the valve body, plugs often become lost, affecting the normal operation of the enclosure. Utility Model Content

[0003] To address the aforementioned technical deficiencies, this utility model provides a drain valve that prevents the plug from completely separating from the tubular valve body during drainage, thus preventing the plug from being lost.

[0004] This utility model discloses a drain valve, including a tubular valve body, a locking nut, and a plug. One end of the tubular valve body extends radially outward to form a retaining ring. A first sealing ring is fitted on the tubular valve body inside the retaining ring. An external thread is provided on the outer surface of the tubular valve body. The locking nut is engaged with the external thread of the tubular valve body. An internal thread is provided inside the end of the tubular valve body away from the retaining ring. One end of the plug extends radially outward to form a handle. An external thread is provided on the outside of the plug. The external thread of the plug is engaged with the internal thread of the tubular valve body. A second sealing ring is provided between the external thread of the plug and the handle. A connecting rod is provided at the end of the plug away from the handle. The connecting rod extends axially, and a limiting support rod is provided at the end of the connecting rod. The limiting support rod is used to prevent the connecting rod from being pulled out of the tubular valve body.

[0005] There are at least two limiting struts, which are arranged radially along the connecting rod and are evenly spaced. The diameter of the circumference of the outermost end of the limiting strut is greater than the inner diameter of the internal thread in the tubular valve body and smaller than the inner diameter of the tubular valve body.

[0006] The internal thread inside the tubular valve body is located at the end away from the retaining ring. When the plug is tightly fitted with the tubular valve body, the limiting support rod is located within the tubular valve body. When the plug is released from the tubular valve body and the limiting support rod contacts the end of the internal thread of the tubular valve body, there is a gap between the plug and the tubular valve body.

[0007] The tubular valve body includes two sections of tubular body with different diameters, namely a first tubular body and a second tubular body. The first tubular body and the second tubular body are connected as one piece. The outer diameter of the first tubular body is larger than that of the second tubular body. The retaining ring is disposed at the end of the first tubular body. The external thread of the tubular valve body is disposed on the second tubular body, and the internal thread of the tubular valve body is disposed inside the second tubular body. The locking nut includes a third tubular body. A locking part extends radially outward at one end of the third tubular body. The outer surface of the locking part has a regular hexagonal structure. An internal thread is disposed inside the third tubular body. The internal thread of the third tubular body is engaged with the external thread of the second tubular body. The outer diameter of the third tubular body is the same as that of the first tubular body.

[0008] The outer surface of the handle of the plug is provided with an anti-slip structure.

[0009] The drain valve obtained by this utility model is installed on the housing by a tubular valve body and a locking nut, and is sealed by a plug. The plug is connected to the tubular valve body by a connecting rod and a limiting support rod. It cannot be completely separated during the drainage process, so it will not be lost and the performance is improved. Attached Figure Description

[0010] Figure 1 This is a front view of the structure of this utility model;

[0011] Figure 2 for Figure 1 Schematic diagram of AA section;

[0012] Figure 3 This is a three-dimensional structural view of the present invention. Detailed Implementation

[0013] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0014] Example 1:

[0015] like Figures 1-3As shown, this utility model discloses a drain valve, including a tubular valve body 1, a locking nut 2, and a plug 3. One end of the tubular valve body 1 extends radially outward to form a retaining ring 11. A first sealing ring 4 is fitted on the tubular valve body 1 inside the retaining ring 11. An external thread is provided on the outer surface of the tubular valve body 1. The locking nut 2 is engaged with the external thread of the tubular valve body 1. An internal thread is provided inside the end of the tubular valve body 1 away from the retaining ring 11. One end of the plug 3 extends radially outward to form a handle portion 31. An external thread is provided on the outside of the plug 3. The external thread of the plug 3 is engaged with the internal thread of the tubular valve body 1. A second sealing ring 5 is provided between the external thread of the plug 3 and the handle portion 31. A connecting rod 6 is provided at the end of the plug 3 away from the handle portion 31. The connecting rod 6 extends axially, and a limiting support rod 7 is provided at the end of the connecting rod 6. The limiting support rod 7 is used to restrict the connecting rod 6 from being pulled out of the tubular valve body 1.

[0016] During the production of the housing, a through hole is made in the housing, and then the tubular valve body 1 is inserted into the through hole. The outer diameter of the retaining ring 11 must be larger than the diameter of the through hole. A first sealing ring 4 is placed between the retaining ring 11 and the housing to achieve a sealed connection between the tubular valve body 1 and the housing. The tubular valve body 1 is fixed to the housing by a locking nut 2. The locking nut 2 and the external thread of the tubular valve body 1 are engaged and locked, thus tightly clamping the housing between the locking nut 2 and the retaining ring 11 of the tubular valve body 1. Therefore, the drain valve is firmly fixed to the housing, and the first sealing ring maintains a good sealing effect. In subsequent use, only the plug 3 needs to be removed and installed to achieve sealing and drainage. The tubular valve body 1 and the locking nut 2 do not need to be disassembled, so the sealing performance remains stable. The plug 3 is locked and connected by its external thread engaging with the internal thread of the tubular valve body 1, and sealed by a second sealing ring 5. When drainage is needed, simply unscrew plug 3. When the external thread of plug 3 disengages from the internal thread of the tubular valve body 1, a gap exists between them for water to flow out. Simultaneously, plug 3 is movably connected to the tubular valve body 1 via connecting rod 6 and limiting support rod 7. When plug 3 is released from the tubular valve body 1 for drainage, the two remain connected, so plug 3 will not detach from the tubular valve body 1 and will not be lost. Because the diameter of connecting rod 6 is relatively small, its location within the tubular valve body 1 does not affect its drainage performance.

[0017] The limiting support rod 7 is at least two. In this embodiment, four limiting support rods 7 are used, arranged in a cross structure. The limiting support rods 7 are arranged radially along the connecting rod 6, and the limiting support rods 7 are evenly spaced. The diameter of the circumference of the outermost end of the limiting support rod 7 is greater than the inner diameter of the internal thread in the tubular valve body 1, but smaller than the inner diameter of the tubular valve body 1.

[0018] The internal threads within the tubular valve body 1 are partially distributed at one end and do not cover the entire tubular valve body 1. The inner diameter of these internal threads is smaller than the inner diameter of the tubular valve body 1. In actual use, the maximum circumference diameter formed by the limiting strut 7 is smaller than the inner diameter of the tubular valve body 1, allowing the plug 3 to rotate freely during assembly and disassembly. The limiting strut 7 can move freely within the tubular valve body 1. When drainage is required and the plug 3 is removed, although a gap may exist between the plug 3 and the tubular valve body 1 for water to flow out, the limiting strut 7 will restrict the internal threads of the tubular valve body 1, preventing the plug 3 from completely detaching from the tubular valve body 1. Therefore, the plug 3 will not be lost during drainage. The limiting support rod 7 has a certain degree of elasticity. During initial assembly, external force is required to push the limiting support rod 7 inward from one end of the tubular valve body 1. When the limiting support rod 7 contacts the internal thread of the tubular valve body 1, the limiting support rod 7 will deform to pass through the internal thread and enter the interior of the tubular valve body 1. In subsequent use, without external force pulling outward, the limiting support rod 7 can remain in the state of being inside the tubular valve body 1 and will not lose the plug 3.

[0019] The internal thread inside the tubular valve body 1 is located at the end away from the retaining ring 11. When the plug 3 is tightly fitted with the tubular valve body 1, the limiting support rod 7 is located within the tubular valve body 1. When the plug 3 is released from the tubular valve body 1 and the limiting support rod 7 contacts the end of the internal thread of the tubular valve body 1, there is a gap between the plug 3 and the tubular valve body 1.

[0020] The internal thread inside the tubular valve body 1 is partial and does not cover the entire tubular valve body 1. Therefore, the limiting support rod 7 has a certain amount of room to move inside the tubular valve body 1. In actual operation, that is, after the plug 3 is engaged with the tubular valve body 1, the limiting support rod 7 is also located inside the tubular valve body 1 and will not enter the box and affect the loading capacity of the box.

[0021] The tubular valve body 1 includes two sections of tubular bodies with different diameters, namely a first tubular body 12 and a second tubular body 13. The first tubular body 12 and the second tubular body 13 are connected as one unit. The outer diameter of the first tubular body 12 is larger than the outer diameter of the second tubular body 13. The retaining ring 11 is disposed at the end of the first tubular body 12. The external thread on the tubular valve body 1 is disposed on the second tubular body 13, and the internal thread on the tubular valve body 1 is disposed inside the second tubular body 13. The locking nut 2 includes a third tubular body 22. A locking part 21 extends radially outward from one end of the third tubular body 22. The outer surface of the locking part 21 has a regular hexagonal structure. An internal thread is disposed inside the third tubular body 22. The internal thread of the third tubular body 22 is engaged with the external thread of the second tubular body 13. The outer diameter of the third tubular body 22 is the same as the outer diameter of the first tubular body 12.

[0022] The tubular valve body 1 is composed of a first tube 12 and a second tube 13, with the outer diameter of the first tube 12 being larger than that of the second tube 13. The two are connected as a single unit. After the third tube 22 of the locking nut 2 is connected to the second tube 13, the outer diameter of the third tube 22 is the same as that of the first tube 12. Thus, when assembling on the housing, the diameter of the through hole on the housing can be the same as the diameter of the first tube 12 and the third tube 22. When the tubular valve body 1 is fixedly connected to the locking nut 2, the first tube 12 and the third tube 22 are inserted into the through hole. Due to the consistent size fit, the connection between the locked tubular valve body 1 and the locking nut 2 on the housing is firm and stable, and the sealing performance is also better.

[0023] The outer surface of the handle 31 of the plug 3 is provided with an anti-slip structure.

[0024] Since the plug 3 is usually disassembled by hand when draining water, an anti-slip structure, such as a textured surface, is provided on the outer surface of the handle 31 of the plug 3.

[0025] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0026] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the interaction relationship between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0027] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simplification, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A drain valve, characterized in that: The device includes a tubular valve body, a locking nut, and a plug. One end of the tubular valve body extends radially outward to form a retaining ring. A first sealing ring is fitted on the tubular valve body inside the retaining ring. An external thread is provided on the outer surface of the tubular valve body. The locking nut is engaged with the external thread of the tubular valve body. An internal thread is provided inside the end of the tubular valve body away from the retaining ring. One end of the plug extends radially outward to form a handle. An external thread is provided on the outside of the plug. The external thread of the plug is engaged with the internal thread of the tubular valve body. A second sealing ring is provided between the external thread of the plug and the handle. A connecting rod is provided at the end of the plug away from the handle. The connecting rod extends axially and a limit support is provided at the end of the connecting rod. The limit support is used to prevent the connecting rod from being pulled out of the tubular valve body.

2. A drain valve according to claim 1, characterized in that: There are at least two limiting struts, which are arranged radially along the connecting rod and are evenly spaced. The diameter of the circumference of the outermost end of the limiting strut is greater than the inner diameter of the internal thread in the tubular valve body and smaller than the inner diameter of the tubular valve body.

3. A drain valve according to claim 2, characterized in that: The internal thread inside the tubular valve body is located at the end away from the retaining ring. When the plug is tightly fitted with the tubular valve body, the limiting support rod is located within the tubular valve body. When the plug is released from the tubular valve body and the limiting support rod contacts the end of the internal thread of the tubular valve body, there is a gap between the plug and the tubular valve body.

4. A drain valve according to claim 1, 2, or 3, characterized in that: The tubular valve body includes two sections of tubular body with different diameters, namely a first tubular body and a second tubular body. The first tubular body and the second tubular body are connected as one piece. The outer diameter of the first tubular body is larger than that of the second tubular body. The retaining ring is disposed at the end of the first tubular body. The external thread of the tubular valve body is disposed on the second tubular body, and the internal thread of the tubular valve body is disposed inside the second tubular body. The locking nut includes a third tubular body. A locking part extends radially outward at one end of the third tubular body. The outer surface of the locking part has a regular hexagonal structure. An internal thread is disposed inside the third tubular body. The internal thread of the third tubular body is engaged with the external thread of the second tubular body. The outer diameter of the third tubular body is the same as that of the first tubular body.

5. A drain valve according to claim 1, characterized in that: The outer surface of the handle of the plug is provided with an anti-slip structure.

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