High-sealing-performance ball valve

Abstract

The high-sealing-performance ball valve comprises a valve body, valve elements are arranged in the middles of the upper side and the lower side of the valve body, valve rods are movably installed in the middles of the valve elements, a handle is connected to one side of the top end of each valve rod, a ball body is fixed to the periphery of the middle of each valve rod, and a protection mechanism is installed on the periphery of the middle of the valve body. According to the high-sealing-performance ball valve, when a worker does not use the valve body, after the valve rod is rotated for the last time to enable the ball body to seal the valve body, the twisting block at one end of the first positive and negative screw rod is screwed manually to rotate the first positive and negative screw rod; two opposite lead screw sliding sleeves I acting with the lead screw can drive inclined limiting frames and limiting column blocks I on the inner sides of the lead screw sliding sleeves I to be connected with sliding blocks I and guide grooves I in a matched mode to perform relative displacement, and meanwhile, when the positive and negative lead screw I rotates, a bevel gear I fixed to the periphery of one side of the middle of the positive and negative lead screw I synchronously drives a bevel gear II and the positive and negative lead screw II to rotate; and two screw rod sliding sleeves II are also screwed on the two sides of the middle part of the positive and negative screw rod II.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves, in particular to a high-sealing ball valve. Background Art

[0002] A ball valve is a type of valve that can rotate 90 degrees. The plug body is a sphere with a circular through hole or channel passing through its axis. Ball valves are widely used in oil refining, long-distance pipelines, chemicals, papermaking, pharmaceuticals, water conservancy, electricity, municipal administration, steel and other industries.

[0003] Chinese patent CN212251286U discloses a ball valve, which belongs to the field of valve technology and solves the problem that the existing ball valve has poor sealing effect and is prone to valve core position deviation under large water flow impact.

[0004] When in use, the above-mentioned ball valve cannot achieve a good pre-protection structure for the opening and closing of the ball by the valve stem. For example, after the normal use of the ball valve is completed, the valve stem may rotate and displace due to accidental touch by subsequent personnel or impact of the handle by external objects. At this time, the ball connected to the valve stem may rotate synchronously inside the valve body, thereby forming circulation in the pipeline and affecting the original sealing protection effect. Utility Model Content

[0005] The purpose of the utility model is to address the deficiencies in the prior art and provide a high-sealing ball valve, which realizes the valve stem limiting function through the cooperation of a transmission component with a linkage component structure, thereby solving the problem that it is impossible to achieve a better pre-protection structure for the opening and closing of the ball by the valve stem. For example, after the ball valve is used normally, the valve stem may rotate and displace due to accidental touching by subsequent personnel or the impact of an external object on the handle. At this time, the ball connected to the valve stem may rotate synchronously inside the valve body, thereby forming a pipeline circulation, affecting the original sealing protection effect.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A high-sealing ball valve comprises a valve body, a valve core is provided in the middle of the upper and lower sides of the valve body, and a valve stem is movably installed in the middle of the valve core, a handle is connected to the top side of the valve stem, and a ball is fixed around the middle of the valve stem, a protection mechanism is installed around the middle of the valve body, the protection mechanism comprises a protective shell, and a protective box is fixed in the upper middle of the protective shell, a linkage protection mechanism is installed inside the protective box, the linkage protection mechanism comprises a forward and reverse screw rod, and the forward and reverse screw rod is transversely installed on one side of the inner part of the protective box, transmission components are installed on the inner and outer edges of both sides of the forward and reverse screw rod, and a linkage component is installed inside one side of the forward and reverse screw rod, and limited slots are provided around the valve stem near the top.

[0008] Furthermore, the transmission assembly includes a screw sleeve, and the screw sleeve is symmetrically screwed on both sides of the middle part of the positive and negative screws, the outer sides of the two screw sleeves are connected with a connecting slider, the inner side of the protective box is provided with a guide groove for guiding the movement of the two connecting sliders, the inner sides of the two screw sleeves are fixed with an oblique limit frame, and the inner side of the oblique limit frame near the top is fixed with a limiting column block.

[0009] Furthermore, the linkage assembly includes a bevel gear 1, and the bevel gear 1 is fixed to the periphery of one side of the middle part of the forward and reverse screw rod 1, one side of the bevel gear 1 is meshed with a bevel gear 2, and one end of the forward and reverse screw rod 2 is fixed to the inner side of the middle part of the bevel gear 2, screw sleeves 2 are screwed on the peripheries of both sides of the middle part of the forward and reverse screw rods 2, and a straight limit frame is fixed to the inner side of the screw sleeve 2, a limiting column block 2 is fixed to the inner side of the straight limit frame near the top, a connecting slider 2 is fixed to the outer side of the screw sleeve 2, and a guide groove 2 for movable guiding of the connecting slider 2 is provided on the adjacent side of the guide groove 1 inside the protective box.

[0010] Furthermore, the limiting slots are distributed around the valve stem near the top, and the opening heights of each pair of the two pairs of limiting slots are different.

[0011] Furthermore, the protection mechanism includes a protective shell, and the protective shell is installed on the central periphery of the valve body, an inner cushion layer is fixed to the inner side of the protective shell, and an insulation layer is attached to the other side of the inner cushion layer.

[0012] Furthermore, the protective shell, the inner cushion layer, the thermal insulation layer and the valve body are adjacently and closely distributed.

[0013] The beneficial effects of the utility model are:

[0014] (1) When the staff of the utility model does not use the valve body, after the valve stem is rotated for the last time to make the ball seal the valve body, the twist block at the end of the positive and negative screws can be manually turned to rotate them. In this state, the two relative screw sleeves acting on the screws can move relative to each other with the oblique limit frames and limit column blocks on their inner sides in coordination with the connecting slider and the guide groove. At the same time, when the positive and negative screws rotate, the bevel gear fixed on the periphery of one side of the middle will synchronously drive the bevel gear and the positive and negative screws to rotate. Since two screw sleeves are also screwed on both sides of the middle of the positive and negative screws, the screws between the two screws can be screwed together. The two relative screw rod sleeves 2 of the threaded transmission can carry their own inner straight limit frames and limit column blocks 2 to cooperate with the connecting slider 2 and the guide groove 2 for relative displacement. Since the positive and negative screw rods 1 and the positive and negative screw rods 2 are installed in different directions, the relative displacement directions of a pair of limit column blocks 1 and a pair of limit column blocks 2 are also different. Finally, under the above-mentioned linkage transmission, the two pairs of limit columns in four directions can be inserted into the four limit slots around one end of the valve stem, so as to achieve the locking positioning of the valve stem in the initial closed state, to prevent the ball from opening due to someone accidentally touching the valve stem or the handle, thereby reducing the waste of water resources.

[0015] (2) In the normal state of the utility model, the insulation layer wrapped around the outer periphery of the valve body can effectively insulate the water flowing inside the valve body in a cold environment, and the adjacent joint arrangement of the inner cushion layer and the protective shell outside the insulation layer can better protect the insulation layer and the valve body inside it.

[0016] In summary, the utility model has the advantages of high protection, good sealing and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 It is the internal schematic diagram of the utility model;

[0019] Figure 3 It is a three-dimensional partial schematic diagram of the utility model;

[0020] Figure 4 For this utility model Figure 3 Schematic diagram at point A in the middle.

[0021] In the figure: 1. valve body; 2. valve core; 3. valve stem; 4. handle; 5. ball; 6. protection mechanism; 61. protective shell; 62. inner cushion layer; 63. insulation layer; 7. protective box; 8. linkage protection mechanism; 81. positive and negative screw rod one; 82. transmission assembly; 821. screw rod sleeve one; 822. connecting slider one; 823. guide groove one; 824. oblique limit frame; 825. limit column block one; 83. linkage assembly; 831. bevel gear one; 832. bevel gear two; 833. positive and negative screw rod two; 834. screw rod sleeve two; 835. straight limit frame; 836. limit column block two; 837. connecting slider two; 838. guide groove two; 84. limit slot. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined. Example

[0025] like Figure 1-2As shown, this embodiment provides a high-sealing ball valve, including a valve body 1, a valve core 2 is opened in the middle of the upper and lower sides of the valve body 1, and a valve stem 3 is movably installed in the middle of the valve core 2, a handle 4 is connected to the top side of the valve stem 3, and a ball 5 is fixed to the middle periphery of the valve stem 3, a protection mechanism 6 is installed in the middle periphery of the valve body 1, the protection mechanism 6 includes a protection shell 61, and a protection box 7 is fixed in the middle of the upper part of the protection shell 61, and a linkage protection mechanism 8 is installed in the protection box 7, the protection mechanism 6 includes a protection shell 61, and the protection shell 61 is installed with a sleeve An inner cushion layer 62 is fixed to the inner side of the protective shell 61 around the middle of the valve body 1, and an insulation layer 63 is attached to the other side of the inner cushion layer 62. The protective shell 61, the inner cushion layer 62, the insulation layer 63 and the valve body 1 are adjacently attached. Under normal conditions, the insulation layer 63 wrapped around the outer periphery of the valve body 1 can effectively insulate the water flowing inside the valve body 1 in a cold environment, and the adjacent joint arrangement of the inner cushion layer 62 and the protective shell 61 outside the insulation layer 63 can better protect the insulation layer 63 and the valve body 1 inside it. Example

[0026] like Figure 1-4As shown, the components that are the same as or corresponding to those in the first embodiment are marked with the corresponding figure marks of the first embodiment. For the sake of simplicity, only the differences from the first embodiment are described below. The difference between the second embodiment and the first embodiment is that: the linkage protection mechanism 8 includes a positive and negative screw rod 81, and the positive and negative screw rod 81 is horizontally installed on one side of the interior of the protective box 7, and transmission components 82 are installed on the inner and outer sides of both sides of the positive and negative screw rod 81. The transmission component 82 includes a screw rod sleeve 821, and the screw rod sleeve 821 is symmetrically screwed on the periphery of both sides of the middle part of the positive and negative screw rod 81. The outer sides of the two screw rod sleeves 821 are connected with a connecting slider 822, and one side of the inner side of the protective box 7 is provided with a guide groove 823 for guiding the two connecting sliders 822. The inner sides of the two screw rod sleeves 821 are fixed with an oblique limit frame 824, and the inner side of the oblique limit frame 824 is fixed with a A limiting column block 825 is provided, and a linkage assembly 83 is installed inside one side of the forward and reverse screw rod 81. A limiting slot 84 is provided around the valve stem 3 near the top. The linkage assembly 83 includes a bevel gear 831, and the bevel gear 831 is fixed to the periphery of one side of the middle part of the forward and reverse screw rod 81. A bevel gear 832 is meshed with one side of the bevel gear 831, and one end of the forward and reverse screw rod 833 is fixed to the inner side of the middle part of the bevel gear 832. Screw sleeves 834 are screwed on the periphery of both sides of the middle part of the forward and reverse screw rod 833, and a straight limiting frame 835 is fixed to the inner side of the screw sleeve 834. A limiting column block 836 is fixed to the inner side of the straight limiting frame 835 near the top. The screw sleeves 834 are fixed to the inner side of the screw sleeves 834. A connecting slider 837 is fixed on the outside, and a guide groove 838 for guiding the connecting slider 837 is provided on the adjacent side of the guide groove 823 inside the protective box 7. The limiting slots 84 are distributed around the valve stem 3 near the top, and the opening heights of each pair of the two pairs of limiting slots 84 are different. When the staff does not use the valve body 1, after the valve stem 3 is rotated for the last time to make the ball 5 seal the valve body 1, the torsion block at one end of the positive and negative screw rod 81 is manually twisted to rotate it. In this state, the two relative screw rod sleeves 821 acting with the screw rod can carry the oblique limiting frames 824 and limiting column blocks 825 on their inner sides to cooperate with the connecting slider 822 and the guide groove 823 for relative displacement. At the same time When the forward and reverse screw rod 1 81 rotates, the bevel gear 1 831 fixed on the periphery of one side of the middle will synchronously drive the bevel gear 2 832 and the forward and reverse screw rod 2 833 to rotate. Since two screw rod sleeves 2 834 are also screwed on both sides of the middle part of the forward and reverse screw rod 2 833, the two relative screw rod sleeves 2 834 can drive their respective inner straight limit frames 835 and limit column blocks 2 836 to cooperate with the connecting slider 2 837 and the guide groove 2 838 to perform relative displacement through the threaded transmission between the two. Since the forward and reverse screw rod 1 81 and the forward and reverse screw rod 2 833 are installed in different directions, the relative displacement directions of a pair of limit column blocks 1 825 and a pair of limit column blocks 2 836 are also different. Finally, under the above-mentioned linkage transmission,The two pairs of limit posts in four directions can be inserted into the four limit slots 84 around the valve stem 3 near one end, so as to lock the valve stem 3 in the initial closed state, and prevent the ball 5 from opening due to someone accidentally touching the valve stem 3 or the handle 4, thereby reducing the waste of water resources.

[0027] Step 1. Under normal conditions, the insulation layer 63 wrapped around the outer periphery of the valve body 1 can effectively insulate the water flowing inside the valve body 1 in a cold environment, and the adjacent joint arrangement of the inner cushion layer 62 and the protective shell 61 outside the insulation layer 63 can better protect the insulation layer 63 and the valve body 1 inside it.

[0028] Step 2, when the staff does not use the valve body 1, after the last rotation of the valve stem 3 to make the ball 5 seal the valve body 1, they can manually twist the torsion block at one end of the forward and reverse screw rod 81 to rotate it. In this state, the two relative screw rod sleeves 821 acting with the screw rod can carry their respective inner oblique limit frames 824 and limit column blocks 825 to cooperate with the connecting slider 822 and the guide groove 823 for relative displacement. At the same time, when the forward and reverse screw rod 81 rotates, the bevel gear 831 fixed on the periphery of one side of the middle will synchronously drive the bevel gear 2 832 and the forward and reverse screw rod 2 833 to rotate. Since two screw rod sleeves 2 834 are also screwed on both sides of the middle part of the forward and reverse screw rod 2 833, the two screw rod sleeves 2 834 are screwed together. The two relative screw rod sleeves 834 of the threaded transmission can carry their own inner straight limit frames 835 and limit column blocks 836 to cooperate with the connecting sliders 837 and guide grooves 838 for relative displacement. Since the installation directions of the positive and negative screw rods 81 and the positive and negative screw rods 833 are different, the relative displacement directions of a pair of limit column blocks 825 and a pair of limit column blocks 836 are also different. Finally, under the above-mentioned linkage transmission, the two pairs of limit columns in four directions can be inserted into the four limit slots 84 around one end of the valve stem 3, so as to achieve the locking positioning of the valve stem 3 in the initial closed state, and prevent the ball 5 from opening due to someone accidentally touching the valve stem 3 or the handle 4, thereby reducing the waste of water resources.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high sealing ball valve, comprising a valve body, It is characterized in that A valve core is provided in the middle of the upper and lower sides of the valve body, and a valve stem is movably installed in the middle of the valve core, a handle is connected to the top side of the valve stem, and a ball is fixed around the middle of the valve stem, a protection mechanism is installed around the middle of the valve body, the protection mechanism includes a protection shell, and a protection box is fixed in the middle above the protection shell, a linkage protection mechanism is installed inside the protection box, the linkage protection mechanism includes a forward and reverse screw rod 1, and the forward and reverse screw rod 1 is horizontally installed on one side of the inner part of the protection box, transmission components are installed on the inner and outer edges of both sides of the forward and reverse screw rod 1, and a linkage component is installed inside one side of the forward and reverse screw rod 1, and limited slots are provided around the valve stem near the top.

2. A high sealing ball valve according to claim 1, It is characterized in that The transmission assembly includes a screw sleeve, and the screw sleeve is symmetrically screwed on both sides of the middle part of the positive and negative screws. The outer sides of the two screw sleeves are connected with a connecting slider. The inner side of the protective box is provided with a guide groove for guiding the two connecting sliders. The inner sides of the two screw sleeves are fixed with an oblique limit frame, and a limiting column block is fixed on the inner side of the oblique limit frame near the top.

3. A high sealing ball valve according to claim 1, It is characterized in that The linkage assembly includes a bevel gear 1, and the bevel gear 1 is fixed to the periphery of one side of the middle part of the forward and reverse screw rod 1, one side of the bevel gear 1 is meshed with a bevel gear 2, and one end of the forward and reverse screw rod 2 is fixed to the inner side of the middle part of the bevel gear 2, screw rod sleeves 2 are screwed on the periphery of both sides of the middle part of the forward and reverse screw rods 2, and a straight limit frame is fixed to the inner side of the screw rod sleeve 2, and a limiting column block 2 is fixed to the inner side of the straight limit frame near the top, a connecting slider 2 is fixed to the outer side of the screw rod sleeve 2, and a guide groove 2 for movable guiding of the connecting slider 2 is opened on the adjacent side of the guide groove 1 inside the protective box.

4. A high sealing ball valve according to claim 1, It is characterized in that The limiting slots are distributed around the valve stem near the top, and the opening heights of each pair of the two pairs of limiting slots are different.

5. A high sealing ball valve according to claim 1, It is characterized in that The protective shell installation sleeve is arranged on the middle periphery of the valve body, an inner cushion layer is fixed to the inner side edge of the protective shell, and a heat-insulating layer is attached to the other side of the inner cushion layer.

6. A high sealing ball valve according to claim 5, It is characterized in that The protective shell, the inner cushion layer, the thermal insulation layer and the valve body are adjacently and closely distributed.

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