Sheet type eccentric shaft valve element structure of plastic valve

Abstract

The utility model relates to the technical field of plastic valves, and discloses a sheet type eccentric shaft valve core structure of a plastic valve, which comprises an upper cover, the upper cover is arranged at the top of a valve body, a valve core is arranged in the valve body, and an eccentric shaft sheet type mechanism is arranged on one side of the valve core. The eccentric shaft piece type mechanism comprises a clamping groove formed in the outer side of one end of the valve element and a sealing ring installed on the outer surface of the valve element in a matched mode, and a gland is arranged on one side of the sealing ring. According to the utility model, the valve rod is rotated to drive the valve core in the valve body to rotate, and the valve core adopts an eccentric shaft piece type structure, so that more than half of materials are saved compared with the original form, the weight is reduced, the gland on the valve core can be efficiently moved to the sealing position of the valve body, and one group of communicating pipes can be blocked; and a certain extrusion force is formed between the matched sealing ring and the cylindrical inner hole wall of the valve body, so that the sealing performance of the gland can be comprehensively improved, and water flow is prevented from overflowing from a gap between the gland and the inner wall of the valve body.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic valves, in particular to a sheet-type eccentric shaft valve core structure of a plastic valve. Background Art

[0002] At present, valves are pipeline accessories used to open and close pipelines, control flow direction, and adjust and control the parameters (temperature, pressure and flow) of the conveying medium. According to their functions, they can be divided into shut-off valves, check valves, regulating valves, etc.

[0003] Among them, in the structure of the existing plastic valve, the valve core is generally a spherical plastic ball core with a hole. In the production process, due to the shape of the ball core during the injection molding process, it is very difficult to make the water hole of the ball core into a perfect circle and the sealing side into a perfect spherical surface. In particular, the three-way ball core is more difficult to be made into a sphere with one perfect spherical surface and three perfect circular holes. Because the sealing ring is a perfect circle, the sealing ring and the ball core cannot be completely sealed, which will cause leakage inside the valve, and in severe cases, it will basically not play a closing role.

[0004] However, the disadvantages in the market are that it is difficult to produce and manufacture, wastes materials, and it is difficult to achieve the sealing effect of the product. Therefore, it is necessary to design a new technical solution to solve it. Improvements can be made in the valve body structure, valve core structure, and sealing ring shape and structure, which will reduce the difficulty of production and manufacturing, reduce costs, greatly improve production efficiency, and fully realize the closing and sealing function of the valve. Utility Model Content

[0005] The utility model aims to provide a sheet-type eccentric shaft valve core structure of a plastic valve, which solves the problems raised in the background technology.

[0006] To achieve the above object, the utility model provides the following technical solutions: a sheet-type eccentric shaft valve core structure of a plastic valve, comprising an upper cover, the upper cover is placed on the top of a valve body, a valve core is placed inside the valve body, and an eccentric shaft sheet-type mechanism is installed on one side of the valve core;

[0007] The eccentric shaft plate mechanism includes a groove opened on the outside of one end of the valve core, a sealing ring fitted on the outer surface of the valve core, and a pressure cover arranged on one side of the sealing ring. The pressure cover and the side wall of the valve core are both arc surfaces, the groove and the sealing ring fit each other, the sealing ring is located between the pressure cover and the valve core, docking holes are opened in the middle of both ends of the outer surface of the valve core, and docking sleeves are fixedly installed on both ends of the inner wall of the pressure cover, so that the pressure cover and the valve core can be docked, and the two groups of the docking sleeves and the docking holes correspond to each other, and the corresponding docking sleeves and docking holes are fixedly connected by ultrasonic welding to ensure the firmness and stability of the pressure cover.

[0008] As an optional solution of the technical solution of the present application, a valve stem is fixedly installed on the top of the valve core, and the valve stem corresponds to the center of the upper cover to facilitate adjustment of the valve core.

[0009] As an optional solution of the technical solution of the present application, an O-ring is sleeved on the bottom of the outer wall of the valve stem, and the outer wall of the O-ring fits with the inner wall of the upper cover to increase the sealing performance of the upper cover after installation.

[0010] As an optional solution of the technical solution of the present application, three groups of equidistantly distributed connecting pipes are installed at the bottom of the valve body, and the ports in the three groups of connecting pipes are mutually matched with the pressure covers, so that one group of connecting pipes can be blocked.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] 1. The technical solution of the present application drives the valve core inside the valve body to rotate by rotating the valve stem. Since the valve core adopts an eccentric shaft sheet structure, it saves more than half of the material and reduces the weight compared with the original form. The pressure cover on the valve core can be efficiently moved to the sealing position of the valve body and one group of connecting pipes can be sealed. In addition, the sealing ring forms a certain extrusion pressure between the cylindrical inner hole wall of the valve body, which can comprehensively increase the sealing performance of the pressure cover and prevent water from overflowing from the gap between the pressure cover and the inner wall of the valve body.

[0013] 2. The technical solution of the present application is to have two sets of docking tubes and docking holes corresponding to each other, and the corresponding docking tubes and docking holes are fixedly connected by ultrasonic welding. When the sealing ring is embedded in the groove on one side of the valve core, the gland can be pushed to squeeze the sealing ring, so that the docking tube on the gland is docked with the docking hole on the valve core, and the gland and the valve core are combined into one by ultrasonic welding technology, and the sealing ring is fixed between the gland and the valve core, so that the three become a whole, which can ensure that the valve core is firm and stable after long-term use, and avoid the loosening and falling off of the gland and the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0015] Figure 1 It is a schematic diagram of the overall structure of a sheet-type eccentric shaft valve core structure of a plastic valve of the utility model;

[0016] Figure 2 The utility model is a schematic diagram of the docking structure of a docking tube and a docking hole of a sheet-type eccentric shaft valve core structure of a plastic valve.

[0017] In the figure: 1, upper cover; 11, valve stem; 12, O-ring; 2, pressure cover; 21, docking tube; 3, sealing ring; 4, valve core; 41, docking hole; 5, valve body; 51, connecting pipe. DETAILED DESCRIPTION

[0018] See also Figure 1-2 The utility model provides a technical solution: a sheet-type eccentric shaft valve core structure of a plastic valve, comprising an upper cover 1, the upper cover 1 is placed on the top of a valve body 5, a valve core 4 is placed inside the valve body 5, and an eccentric shaft sheet-type mechanism is installed on one side of the valve core 4;

[0019] The eccentric shaft plate mechanism includes a groove opened on the outside of one end of the valve core 4, a sealing ring 3 fitted on the outer surface of the valve core 4, and a pressure cover 2 on one side of the sealing ring 3. The pressure cover 2 and the side walls of the valve core 4 are both arc surfaces. The groove and the sealing ring 3 fit each other, and the sealing ring 3 is located between the pressure cover 2 and the valve core 4.

[0020] In this technical solution, by rotating the valve stem 11, the valve core 4 inside the valve body 5 is driven to rotate. Since the valve core 4 adopts an eccentric shaft sheet structure, more than half of the material is saved compared with the original form, and the weight is reduced. The pressure cover 2 on the valve core 4 can be efficiently moved to the sealing position of the valve body 5, and one group of connecting pipes 51 can be sealed. In addition, the sealing ring 3 is used to form a certain extrusion pressure between the cylindrical inner hole wall of the valve body 5, which can comprehensively increase the sealing performance of the pressure cover 2 and prevent water from overflowing from the gap between the pressure cover 2 and the inner wall of the valve body 5.

[0021] In some technical solutions, docking holes 41 are opened in the middle of both ends of the outer surface of the valve core 4, and docking tubes 21 are fixedly installed on both ends of the inner wall of the pressure cover 2, so that the pressure cover 2 and the valve core 4 can be docked. The two groups of docking tubes 21 and the docking holes 41 correspond to each other, and the corresponding docking tubes 21 and the docking holes 41 are fixedly connected by ultrasonic welding to ensure the firmness and stability of the pressure cover 2.

[0022] In this technical solution, after the sealing ring 3 is embedded in the groove on one side of the valve core 4, the gland 2 can be pushed to squeeze the sealing ring 3, so that the docking tube 21 on the gland 2 is docked with the docking hole 41 on the valve core 4, and the gland 2 and the valve core 4 are combined into one by ultrasonic welding technology, and the sealing ring 3 is fixed between the gland 2 and the valve core 4, so that the three become a whole, which can ensure that the valve core 4 is firm and stable after long-term use, and avoid the gland 2 and the sealing ring 3 from loosening and falling off.

[0023] In some technical solutions, three groups of equidistantly distributed connecting pipes 51 are installed at the bottom of the valve body 5 , and the ports in the three groups of connecting pipes 51 are all matched with the pressure cover 2 , so that one group of the connecting pipes 51 can be blocked.

[0024] In this technical solution, when the valve stem 11 is rotated to make the gland 2 on one side of the valve core 4 dock with one group of the connecting pipes 51, it can be blocked to make the other two groups of connecting pipes 51 communicate with each other.

[0025] In some technical solutions, a valve stem 11 is fixedly installed on the top of the valve core 4, and the valve stem 11 corresponds to the center of the upper cover 1, which is convenient for adjusting the valve core 4. An O-ring 12 is sleeved on the bottom of the outer wall of the valve stem 11, and the outer wall of the O-ring 12 fits with the inner wall of the upper cover 1 to increase the sealing performance of the upper cover 1 after installation.

[0026] In this technical solution, when the welding line on the outer edge of the upper cover 1 and the welding groove on the upper edge of the valve body 5 are welded into a whole by heat rotation welding, and an O-ring 12 is installed between the valve stem 11 and the upper cover 1, the sealing between the upper cover 1 and the valve body 5 can be further increased.

[0027] When a sheet-type eccentric shaft valve core structure of a plastic valve is used, it should be noted that the utility model is a sheet-type eccentric shaft valve core structure of a plastic valve, and each component is a universal standard part or a component known to technical personnel in this field, and its structure and principle can be known to technical personnel through technical manuals or through conventional experimental methods.

[0028] When in use, first put the valve core 4 into the interior of the valve body 5, so that the protrusion at the bottom of the valve core 4 is inserted into the groove at the center of the bottom surface of the valve body 5, and then put the upper cover 1 on the upper part of the valve body 5, and make the welding line on the outer edge of the upper cover 1 and the welding groove on the upper edge of the valve body 5 weld the upper cover 1 and the valve body 5 into a whole by heat rotation welding, so that the welding point between the two can achieve a sealing effect under a specific pressure, and at the same time, the valve stem 11 is rotated to drive the valve core 4 inside the valve body 5 to rotate. Since the valve core 4 adopts an eccentric shaft sheet structure, it saves more than half of the material and reduces the weight compared with the original form. The upper pressure cover 2 of the valve core 4 can be efficiently moved to the sealing position of the valve body 5, and one group of connecting pipes 51 can be blocked, and the matching sealing ring 3 is with the cylindrical inner hole of the valve body 5. A certain extrusion pressure is formed between the walls, which can comprehensively increase the sealing performance of the gland 2 and prevent water from overflowing from the gap between the gland 2 and the inner wall of the valve body 5. At the same time, two sets of docking tubes 21 correspond to the docking holes 41, and the corresponding docking tubes 21 and docking holes 41 are fixedly connected by ultrasonic welding. When the sealing ring 3 is embedded in the groove on one side of the valve core 4, the gland 2 can be pushed to squeeze the sealing ring 3, so that the docking tube 21 on the gland 2 is docked with the docking hole 41 on the valve core 4, and the gland 2 and the valve core 4 are combined into one by ultrasonic welding technology, and the sealing ring 3 is fixed between the gland 2 and the valve core 4, so that the three become a whole, which can ensure that the valve core 4 is firm and stable after long-term use, and avoid the gland 2 and the sealing ring 3 from loosening and falling off.

Claims

1. A sheet-type eccentric shaft valve core structure of a plastic valve, comprising an upper cover (1), characterized in that: The upper cover (1) is placed on the top of the valve body (5), a valve core (4) is placed inside the valve body (5), and an eccentric shaft-type mechanism is installed on one side of the valve core (4); The eccentric shaft plate mechanism comprises a groove opened on the outer side of one end of the valve core (4), a sealing ring (3) fitted on the outer surface of the valve core (4), and a pressure cover (2) arranged on one side of the sealing ring (3); the pressure cover (2) and the side wall of the valve core (4) are both arc surfaces; the groove and the sealing ring (3) fit each other; the sealing ring (3) is located between the pressure cover (2) and the valve core (4); docking holes (41) are opened in the middle of both ends of the outer surface of the valve core (4); docking tubes (21) are fixedly installed on both ends of the inner wall of the pressure cover (2); two groups of the docking tubes (21) and the docking holes (41) correspond to each other; and the corresponding docking tubes (21) and the docking holes (41) are fixedly connected by ultrasonic welding.

2. The sheet-type eccentric shaft valve core structure of a plastic valve according to claim 1, characterized in that: A valve stem (11) is fixedly mounted on the top of the valve core (4), and the valve stem (11) corresponds to the center of the upper cover (1).

3. The sheet-type eccentric shaft valve core structure of a plastic valve according to claim 2, characterized in that: An O-ring (12) is sleeved on the bottom of the outer wall of the valve stem (11), and the outer wall of the O-ring (12) fits with the inner wall of the upper cover (1).

4. The sheet-type eccentric shaft valve core structure of a plastic valve according to claim 1, characterized in that: The bottom of the valve body (5) is connected and installed with three groups of equidistantly distributed connecting pipes (51), and the inner ports of the three groups of connecting pipes (51) are all mutually matched with the gland (2).

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