Diaphragm valve with locking mechanism

Abstract

The utility model relates to a diaphragm valve with a locking mechanism, which comprises necessary diaphragm valve assembly parts such as a valve body, a valve rod, a valve cover, a hand wheel, a valve plate and the like, and a valve rod gear is positioned at the bottom of the valve rod; the driven gear is installed in the valve cover through a support and is in meshing transmission with the valve rod gear. The valve cover is movably sleeved with the locking shell, and limiting teeth are arranged on the inner side face of the locking shell. An L-shaped window is formed in the lateral face of the valve cover, the limiting teeth penetrate through the L-shaped window in the valve cover, and the L-shaped window guides the limiting teeth to be inserted into the tooth groove of the driven gear or not to be inserted into the tooth groove of the driven gear. The elastic piece is installed on the lower portion of the locking shell and pushes the locking shell upwards. The locking mechanism is convenient to operate, and can effectively prevent the opening degree change of the valve caused by mistaken touch, misoperation and the like.

Description

Technical Field

[0001] This application belongs to the technical field of diaphragm valves, and in particular relates to a diaphragm valve with a locking mechanism. Background Art

[0002] Traditional manual diaphragm valves use external force to turn the handwheel to move the valve core up and down to achieve the opening and closing of the valve. During use, human error or accidental contact often occurs, affecting the opening amplitude or closing position of the valve. In this case, a valve that can prevent misoperation or accidental contact is needed.

[0003] Some existing diaphragm valves have set up locking structures to solve this problem. For example, Chinese Utility Model Patent No. 202220325284.1 provides a safety anti-misoperation diaphragm valve, which includes a valve stem, a valve cover and a handwheel. One end of the valve stem passes through the valve stem and is connected to the handwheel. There is an installation hole on the handwheel, and a locking device is arranged in the installation hole. There is a locking disk on the valve cover, and several locking grooves are arranged on the locking disk. The locking device includes a lock core that needs to insert a key to rotate and a locking rod. The lock core and the locking rod are in linkage cooperation; the present utility model sets that the lock core needs to be rotated by inserting a key to improve the safety performance of the locking device. By rotating the lock core, the locking rod is inserted into the locking groove for locking to prevent the handwheel from rotating due to misoperation, preventing production accidents and being simple and very convenient to operate; in addition, the locking grooves on the locking disk are set according to different opening degrees of the diaphragm valve, and the size of the medium flow can be controlled. However, the structure of the diaphragm valve itself is relatively compact and precise. Setting a more precise locking structure inside this valve body poses a great challenge to production equipment and production conditions. Although the locking operation is easy, the production conditions are demanding, the cost is not low, and the composition is not simple. Summary of the Utility Model

[0004] The technical problem to be solved by the present utility model is: to solve the deficiencies in the prior art of high production condition requirements, high cost and complex composition, and thus provide a diaphragm valve with a locking mechanism.

[0005] The technical solution adopted by the present utility model to solve its technical problems is:

[0006] A diaphragm valve with a locking mechanism, having necessary assembled components of a diaphragm valve such as a valve body, a valve stem, a valve cover, a handwheel, a valve plate, etc. One end of the valve stem is threadedly connected inside the valve cover, and the end located inside the valve cover is connected to the valve plate of the diaphragm valve. The end of the valve stem located outside the valve body is connected to the handwheel, and further includes:

[0007] A valve stem gear, which is located at the bottom of the valve stem;

[0008] A driven gear, which is installed inside the valve cover through a bracket and meshes with the valve stem gear for transmission;

[0009] A locking housing, the locking housing is movably sleeved outside the valve cover, and a limiting tooth is arranged on the inner side surface of the locking housing;

[0010] An L-shaped window is opened on the side surface of the valve cover, the limiting tooth passes through the L-shaped window on the valve cover, and the L-shaped window guides the limiting tooth to be inserted into and not inserted into the tooth groove of the driven gear;

[0011] An elastic member, the elastic member is installed at the lower part of the locking housing and pushes the locking housing upward.

[0012] Further, a skirt is arranged at the lower end of the locking housing, and the elastic member is installed in the skirt.

[0013] Further, an anti-separation outer groove is arranged outside the valve cover to prevent the locking housing from separating, and a protruding part that can move up and down is arranged at the upper end of the locking housing and inserted into the anti-separation outer groove.

[0014] Further, a guiding mark for marking the moving track of the limiting tooth is arranged outside the locking housing.

[0015] Further, the bracket of the driven gear includes a bottom plate and two connecting bodies. The driven gear rotates on the bottom plate, the two connecting bodies are respectively located at both ends of the bottom plate, and the driven gear is located between the two connecting bodies.

[0016] Further, the elastic member is a spring.

[0017] The beneficial effects of the utility model are as follows:

[0018] 1. The product structure of the utility model is simple and easy to manufacture. The valve stem gear, the driven gear, the elastic member and the locking housing are all products that are easy to process and are more easily obtained from the market, and the assembly of the whole component structure is also easy.

[0019] 2. The locking mechanism is convenient to operate and can effectively prevent the valve opening from changing caused by accidental touch, misoperation, etc. Description of the Drawings

[0020] The technical solutions of the present application will be further described below in conjunction with the drawings and embodiments.

[0021] Figure 1 It is a schematic structural diagram of the locked state of the embodiment of the present application;

[0022] Figure 2 It is a schematic structural diagram of the driven gear of the embodiment of the present application;

[0023] Figure 3 It is a schematic perspective structural diagram of the embodiment of the present application;

[0024] Figure 4 It is a schematic diagram of the L-shaped window structure according to an embodiment of the present application;

[0025] Figure 5 It is a schematic diagram of the unlocked state structure according to an embodiment of the present application;

[0026] The reference numerals in the figure are:

[0027] 10. Valve body, 20. Valve stem, 30. Valve cover, 31. L-shaped window, 32. Movable outer groove, 40. Handwheel, 50. Valve plate, 60. Valve stem gear, 70. Driven gear, 71. Bracket, 711. Bottom plate, 712. Connecting body, 80. Locking housing, 81. Limiting tooth, 82. Skirt, 83. Guiding mark, 90. Elastic member. Detailed implementation manners

[0028] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other.

[0029] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0030] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0031] Hereinafter, the technical solutions of the present application will be described in detail with reference to the drawings and in combination with the embodiments.

[0032] Embodiment

[0033] This embodiment provides a diaphragm valve with a locking mechanism, which includes a valve body 10, a valve stem 20, a valve cover 30, a handwheel 40, and a valve plate 50. One end of the valve stem 20 is threadedly connected inside the valve cover 30, and the end located inside the valve cover 30 is connected to the valve plate 50 of the diaphragm valve. The end of the valve stem 20 located outside the valve body 10 is connected to the handwheel 40. It further includes:

[0034] A valve stem gear 60, which is located at the bottom end of the valve stem 20;

[0035] A driven gear 70, which is installed inside the valve cover 30 through a bracket 71 and meshes with the valve stem gear 60 for transmission;

[0036] A locking housing 80, which is movably sleeved outside the valve cover 30 and can rotate and move up and down outside the valve cover 30. A limiting tooth 81 is installed on the inner side surface of the locking housing 80;

[0037] An L-shaped window 31 is provided on the side surface of the valve cover 30. The limiting tooth 81 passes through the L-shaped window 31 on the valve cover 30. The L-shaped window 31 guides the limiting tooth 81 to insert into and not insert into the tooth slot of the driven gear 70. The states of the limiting tooth 81 when it moves to both ends of the L-shaped window 31 are different. Preferably, when it is located at the upper end of the L-shaped window 31, the limiting tooth 81 inserts into the tooth slot of the driven gear 70, and the driven gear 70 cannot rotate. Consequently, the valve stem gear 60 on the valve stem 20 cannot rotate, and the valve stem 20 cannot rotate, realizing the locking action. When it is located at the lower end of the L-shaped window 31, the limiting tooth 81 does not insert into the tooth slot of the driven gear 70, and it is in an active state at this time;

[0038] An elastic member 90, which is installed at the lower part of the locking housing 80 and pushes the locking housing 80 upward. The diaphragm valve is in a locked state under normal conditions. Pushing the locking housing 80 upward completes the locking. When a non-locked state is required under the elastic force of the elastic member, rotate the locking housing 80 downward to move it, driving the limiting tooth 81 out of the tooth slot of the driven gear 70 and being limited by the bottom end of the L-shaped window 31. At this time, it is in an unlocked state, and people can hold and rotate the handwheel 40 to open or close the diaphragm valve. Here, the elastic member 90 is preferably a spring, and any component with the same performance as a spring can be used.

[0039] As an embodiment of the present invention, a skirt 82 can be provided at the lower end of the locking housing 80, and the elastic member 90 is installed inside the skirt 82 to lock the position of the elastic member 90 and protect the elastic member 90 inside at the same time.

[0040] As an embodiment of the present invention, an active outer groove 32 can be provided on the upper outer end of the valve cover 30 to prevent the locking housing 80 from detaching. A protruding part 82 that can move up and down is provided at the upper end of the locking housing 80 and is inserted into the active outer groove 32 to limit the moving range of the locking housing 80.

[0041] As an embodiment of the present utility model, a guiding mark 83 for marking the moving track of the identification limiting teeth 81 is provided on the outer surface of the locking housing 80, which helps to quickly operate the product of the present utility model to achieve the locked or unlocked state.

[0042] As an embodiment of the present utility model, the bracket 71 of the driven gear 70 includes a bottom plate 711 and two connecting bodies 712. The driven gear 70 rotates on the bottom plate 711. The two connecting bodies 712 are respectively located at both ends of the bottom plate 711. The driven gear 70 is located between the two connecting bodies 712. The upper ends of the connecting bodies 712 are fixed to the top end of the locking housing 80 to achieve stable connection.

[0043] When the present utility model is in use:

[0044] By rotating the handwheel, the opening and closing of the valve are realized. Press down the locking housing and rotate it clockwise, and the locking housing is fixed at the bottom. When the handwheel rotates, the valve can move freely. Rotate the locking housing counterclockwise to the locking position, and the locking housing will bounce upward under the action of the spring thrust. At this time, the teeth on the inner side of the locking housing mesh with the driven gear, and the driven gear is locked. Furthermore, the valve stem gear is also locked. At this time, the valve stem and the handwheel cannot rotate, and then the valve is locked and cannot move.

[0045] Inspired by the above ideal embodiment according to the present application, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this application. The technical scope of this application is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A diaphragm valve with a locking mechanism, comprising a valve body, a valve stem, a valve cover, a handwheel, and a valve plate. One end of the valve stem is threadedly connected inside the valve cover, and the end located inside the valve cover is connected to the valve plate. The end of the valve stem located outside the valve body is connected to the handwheel, characterized in that, It further includes: a valve stem gear located at the bottom of the valve stem; a driven gear mounted inside the valve cover through a bracket and meshed with the valve stem gear for transmission; a locking housing movably sleeved outside the valve cover, with a limiting tooth provided on the inner side surface of the locking housing; an L-shaped window opened on the side surface of the valve cover, the limiting tooth passing through the L-shaped window on the valve cover, and the L-shaped window guiding the limiting tooth to be inserted into and not inserted into the tooth groove of the driven gear; an elastic member mounted at the lower part of the locking housing to push the locking housing upward; 2. The diaphragm valve with a locking mechanism according to claim 1, characterized in that, a skirt provided at the lower end of the locking housing, and the elastic member is mounted inside the skirt; 3. The diaphragm valve with a locking mechanism according to claim 2, wherein, an activity outer groove is provided outside the valve cover to prevent the locking housing from detaching, and a protruding part that can move up and down is provided at the upper end of the locking housing and inserted into the activity outer groove; 4. A diaphragm valve with a locking mechanism according to claim 3, characterized in that, a guiding mark for marking the movement track of the limiting tooth is provided outside the locking housing; 5. A diaphragm valve with a locking mechanism according to claim 1, characterized in that, the bracket of the driven gear includes a bottom plate and two connecting bodies, the driven gear rotates on the bottom plate, the two connecting bodies are respectively located at both ends of the bottom plate, and the driven gear is located between the two connecting bodies; 6. A diaphragm valve with a locking mechanism according to claim 1, characterized in that, the elastic member is a spring.

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