A reversing structure for a three-way valve

Abstract

The application relates to a reversing structure for a three-way valve, characterized in that the reversing structure comprises a shell and a rotary valve core arranged in the shell, the shell is rotationally connected with the rotary valve core; a straight-through inlet is arranged on one side of the shell, a straight-through outlet and an obtuse-angle outlet are arranged on the other side of the shell, and the straight-through inlet is eccentrically communicated with the straight-through outlet; the rotary valve core comprises a valve core body, an eccentric channel is arranged in the valve core body, and upper and lower rotating shafts are arranged on the upper and lower portions of the valve core body respectively. The three-way reversing purpose is achieved through the rotation of the rotary valve core; meanwhile, when the reversing structure is used in the three-way valve, the three-way valve will not be blocked during straight and oblique conveying in the obtuse-angle bevel pipeline, the eccentric channel is not blocked by a central shaft, and problems such as the breakage of powder and particles caused by impact do not occur.

Description

Technical Field

[0001] The present invention relates to the technical field of three-way valves, in particular to a reversing structure for three-way valves, and more particularly to a reversing structure for three-way valves used for conveying powders and particles. Background Art

[0002] Currently, the filling industry generally prefers straight pipes for powder conveying. When encountering a 90° conveying angle, the pipe's deflection radius is increased, typically greater than five times the pipe's diameter. This is because a too small deflection radius can cause material accumulation at the 90° bend, resulting in conveying blockages. However, all 90° three-way valves on the market have a small deflection radius, making them unsuitable for powder conveying. This creates inconvenience for powder conveying and filling. Due to the requirements of the assembly line and filling machine settings, powders inevitably need to be transported around corners during conveying.

[0003] The three-way valves currently on the market all have a 90° vertical structure, that is, the inlet and the two outlets are at a 90° angle, and the delivery pipeline is switched by rotating the middle shaft; a very small number of them have an obtuse-angle structure, that is, the inlet is parallel to one of the outlets and at an obtuse angle to the other outlet, and a rotatable baffle is used to cover one of the outlets. The existing tees are basically used for liquid or gas transportation.

[0004] If an obtuse-angle tee is used for corner transportation, the obtuse-angle tee has a central axis and a conveying cavity on its structure. During the transportation to the oblique side pipeline, some materials will collide with the central axis, which can easily cause powder or particles to break, reducing the quality of the material and product. In addition, some materials will accumulate in the cavity of the obtuse-angle tee, resulting in incomplete transportation and deterioration of the accumulated materials. The reason why the above-mentioned three-way valve cannot meet the needs of the market and has too many problems in transporting powders and particles is mainly due to the problem of the reversing structure, the most important component of the three-way valve.

[0005] Therefore, the market urgently needs a three-way valve reversing structure that can solve the three-way reversing problem during powder transportation and avoid particle damage. Summary of the Invention

[0006] The purpose of the present invention is to provide an improved reversing structure for a three-way valve, which can overcome the shortcomings of the prior art that elbow conveying easily causes blockage, and the obtuse-angled three-way has a central axis and a conveying cavity, which causes powder or particle crushing.

[0007] In order to achieve the above-mentioned purpose, the technical solution of the present invention is: a reversing structure for a three-way valve, characterized in that: the reversing structure includes a shell and a rotary valve core arranged in the shell, and the shell and the rotary valve core are rotationally connected; the shell includes a cylindrical barrel, one side of the barrel is provided with a straight-through inlet, and the other side of the barrel is provided with a straight-through outlet and an obtuse-angle outlet, the straight-through inlet is connected to the straight-through outlet and the obtuse-angle outlet respectively, and the straight-through inlet and the straight-through outlet are eccentrically connected; the rotary valve core includes a valve core body, and an eccentric channel is provided in the valve core body for conveying materials, the eccentric channel is matched with the eccentric size of the straight-through inlet and outlet of the shell, and the upper and lower rotating shafts are respectively provided at the upper and lower parts of the valve core body.

[0008] Preferably, there is an obtuse angle between the obtuse angle outlet and the straight inlet of the shell, and the obtuse angle ranges from 120 to 165 degrees. The obtuse angle outlet and the straight inlet are connected to the inner side wall of the shell.

[0009] Furthermore, the upper and lower rotating shafts are symmetrically arranged at the upper and lower ends of the valve core body. The upper and lower rotating shafts are solid cylinders, and the eccentric channel is a double-layer eccentric hole. The inner hole of the double-layer eccentric hole is connected to the conveying channel, and a sealing component is arranged in the outer hole.

[0010] Preferably, the valve core body is a cylinder, and the size of the cylinder matches that of the cylindrical barrel of the shell, so that after the shell and the rotary valve core are matched, the cavity in the cylindrical barrel is filled.

[0011] Furthermore, a group of evenly distributed circular holes are respectively provided on the upper and lower end surfaces of the cylindrical body of the shell.

[0012] Compared with the prior art, the technical solution of the present invention not only improves the overall technical solution, but also includes many improvements in details. Specifically, it has the following beneficial effects:

[0013] 1. The improved solution of the present invention comprises a housing and a rotary valve core matched with the housing. The rotary valve core can rotate within the housing. The housing is provided with a straight-through inlet, outlet and an obtuse-angle outlet. By rotating the rotary valve core, the eccentric channel within the rotary valve core is connected to the straight-through inlet and outlet or the straight-through inlet and the obtuse-angle outlet, thereby achieving the purpose of three-way reversing.

[0014] 2. In the technical solution of the present invention, after the reversing structure is used in the three-way valve, the three-way valve will not be blocked during straight and oblique conveying in the obtuse angle bevel pipeline. There is no central axis obstruction in the eccentric channel, and the problem of powder and particles being broken due to impact will not occur.

[0015] 3. The present invention cleverly cooperates with the housing and the rotary valve core to eliminate the redundant cavity in the housing after the cooperation. The eccentric design ensures that when the conveying channel on one side is connected, the conveying channel on the other side is not closed but does not exist at all. This solid barrier avoids the accumulation of materials that may occur during conveying.

[0016] 4. The present invention can be installed and used in the forward or reverse direction. When installed and used in the reverse direction, the oblique discharge port that is deflected to the right can be changed to be deflected to the left, which has wider applicability and is conducive to promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the first usage state of the present invention.

[0018] Figure 2 This is a schematic diagram of a second usage state of the present invention.

[0019] Figure 3 It is a schematic diagram of the shell structure of the present invention.

[0020] Figure 4 It is a schematic diagram of the rotary valve core structure of the present invention.

[0021] Figure 5 It is a cross-sectional view of the rotary valve core of the present invention.

[0022] Figure 6 It is a three-dimensional diagram of the rotary valve core of the present invention.

[0023] Figure 7 It is a partially enlarged schematic diagram of the eccentric channel of the present invention.

[0024] Reference numerals:

[0025] 1 housing, 2 rotary valve core;

[0026] 11 cylindrical body, 12 straight inlet, 13 straight outlet, 14 obtuse angle outlet;

[0027] 21 valve core body, 22 eccentric channel, 23 upper rotating shaft, 24 lower rotating shaft;

[0028] 221 inner hole, 222 outer hole. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] The present invention provides a reversing structure for a three-way valve, see Figure 1 , which differs from the prior art in that: the reversing structure includes a shell and a rotary valve core arranged in the shell, and the shell and the rotary valve core are rotationally connected; the shell includes a cylindrical barrel, one side of the barrel is provided with a straight inlet, and the other side of the barrel is provided with a straight outlet and an obtuse-angle outlet, the straight inlet is connected to the straight outlet and the obtuse-angle outlet respectively, the straight inlet and the straight outlet are eccentrically connected, the eccentric distance is A, and the eccentric distance range is 1 / 5-1 / 3 of the straight inlet diameter, see the attached figure for details; the rotary valve core includes a valve core body, and an eccentric channel is provided in the valve core body for conveying materials, the eccentric channel is matched with the eccentric size of the straight inlet and outlet of the shell, and the upper and lower rotating shafts are respectively provided on the upper and lower parts of the valve core body.

[0031] When in use, the rotary valve core can rotate in the shell. The shell is provided with a straight inlet, an outlet and an obtuse-angle outlet. Through the rotation of the rotary valve core, the eccentric channel in the rotary valve core is connected to the straight inlet and outlet or the straight inlet and the obtuse-angle outlet to achieve the purpose of three-way reversing. The straight inlet and the straight outlet here are eccentrically set, and the purpose of connection is achieved through the eccentric channel in the rotary valve core. This eccentric connection can achieve precise connection, and materials will not accumulate during transportation.

[0032] At the same time, since the rest of the rotary valve core except the eccentric channel is a realization component, during the rotation of the rotary valve core, only one conveying channel can always be connected, ensuring the reliability of conveying. At the same time, when this channel is conveying, the other channel is not a closed cavity, but does not exist at all. This further ensures that there will be no powder leakage during conveying, and completely eliminates the possibility of material accumulation.

[0033] In one embodiment, after the rotary valve core rotates, the obtuse-angle outlet and the straight-through inlet are connected through an eccentric channel. There is an obtuse angle between the obtuse-angle outlet and the straight-through inlet of the shell. The obtuse angle ranges from 120 to 165 degrees, and the preferred angle is 135 to 152 degrees. The obtuse-angle outlet and the straight-through inlet are connected to the inner wall of the shell. After the eccentric channel connects the obtuse-angle outlet and the straight-through inlet, since there is no obstruction of the central axis in the eccentric channel, there will be no problems such as powder and particles being broken due to impact when conveying materials. In the prior art, the connection point of the two channels is generally placed at the center of the three-way valve, which results in no obstruction at the center point of the three-way valve, reducing the manufacturing difficulty and cost of the entire reversing structure.

[0034] In actual operation, in order to ensure the rotation accuracy of the rotary valve core, ensure the maximum diameter connection between the outlet and the inlet, and ensure that the eccentric channel is completely precisely matched with the inlet and outlet, a mark can be provided on the rotary valve core to ensure precise positioning during rotation. Furthermore, a raised clamping point is provided inside the housing to ensure that the rotary valve core rotates in the correct direction and does not cause incorrect connection of the eccentric channel due to incorrect clockwise or counterclockwise rotation. At the same time, in order to ensure that powder does not accumulate at the connection point between the obtuse-angle outlet and the straight-through inlet, one end of the eccentric channel (i.e., the connection point with the straight-through inlet) is provided with an arc-shaped inner wall surface, so that the eccentric channel and the straight-through inlet are connected with a curved angle. This is more conducive to the passage of powder and materials, reduces the probability of powder jamming, and eliminates the accumulation of powder.

[0035] In another embodiment, the upper and lower rotating shafts are symmetrically disposed at the upper and lower ends of the valve core body. The upper and lower rotating shafts are solid cylinders, and the eccentric channel is a double-layered eccentric hole. The inner hole of the double-layered eccentric hole is connected to the delivery channel, and a sealing assembly is disposed within the outer hole. The eccentric channel size can be selected from Φ45, Φ50.8, Φ60.3, Φ63.5, or Φ76.2. The volume ratio of the inner eccentric hole to the outer eccentric hole is 1:1.05-1.12, making the eccentric hole not only easy to manufacture but also effective in use. The double-layered eccentric hole avoids gaps that may form when the eccentric channel is connected to the inlet and outlet ports, providing better sealing and preventing air leakage. The sealing assembly disposed within the outer hole can be a sealing ring. There is an obtuse angle between the obtuse angle outlet and the straight inlet of the shell, and the obtuse angle is selected to be 150 degrees. When used, it can be installed in the forward or reverse direction. When installed in the reverse direction, the oblique discharge port that is deflected to the right can be changed to be deflected to the left. It has wider applicability and is conducive to promotion and application.

[0036] Specifically, the valve core body is a cylinder, which matches the size of the cylindrical barrel of the shell, so that after the shell and the rotating valve core are matched, the cavity in the cylindrical barrel is filled. The upper and lower end faces of the cylindrical barrel of the shell are respectively provided with a group of evenly distributed circular holes. Furthermore, in order to ensure the conveying effect of the conveying channel, there is a height difference between the two ends of the double-layer eccentric hole, that is, there is a height difference between the straight-through inlet and the straight-through outlet, and there is also a height difference between the straight-through inlet and the obtuse-angle outlet. This height difference can be used to better solve the problem of powder or material accumulation. Even if some powders are more viscous, there will be no accumulation and blockage. This height difference is selected between 1.5-2.5, and the optimal value is 1.89.

[0037] During implementation, the shell and the rotary valve core are matched so that there is no extra cavity in the shell after matching. The eccentric design makes it possible for the conveying channel on one side to be connected while the conveying channel on the other side is not closed but does not exist at all. This solid barrier avoids the accumulation of materials that may occur during transportation.

[0038] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be considered that the specific implementation of the present invention is limited to the above description. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A reversing structure for a three-way valve, characterized in that: The reversing structure includes a housing and a rotary valve core arranged in the housing, and the housing and the rotary valve core are rotationally connected; The housing comprises a cylindrical body, with a straight-through inlet provided on one side of the body and a straight-through outlet and an obtuse-angle outlet provided on the other side of the body. The straight-through inlet is connected to the straight-through outlet and the obtuse-angle outlet respectively, and the straight-through inlet and the straight-through outlet are eccentrically connected; the eccentric distance ranges from 1 / 5 to 1 / 3 of the straight-through inlet diameter; the connection point between the eccentric channel of the housing and the straight-through inlet is provided with an arc-shaped inner wall surface, so that the eccentric channel of the housing and the straight-through inlet are connected through a curved angle; the interior of the housing is provided with a raised clamping point to ensure the correct direction of the valve core during rotation; The rotary valve core includes a valve core body, in which an eccentric channel is provided for conveying materials. The eccentric channel of the valve core body matches the eccentric size of the straight-through inlet and outlet of the shell. The upper and lower rotating shafts are respectively provided on the upper and lower parts of the valve core body. The upper and lower rotating shafts are symmetrically arranged at the upper and lower ends of the valve core body. The upper and lower rotating shafts are solid cylinders. The eccentric channel is a double-layer eccentric hole. The inner hole of the double-layer eccentric hole is connected to the conveying channel, and a sealing component is provided in the outer hole. At the same time, the volume ratio of the inner hole to the outer hole is 1:1.05-1.

12. There is a height difference between the two ends of the double-layer eccentric hole, that is, there is a height difference between the straight-through inlet and the straight-through outlet, and there is also a height difference between the straight-through inlet and the obtuse-angle outlet. The value range of these two height differences is 1.5-2.5mm.

2. A reversing structure for a three-way valve according to claim 1, characterized in that: There is an obtuse angle between the obtuse angle outlet and the straight inlet of the shell, and the range of the obtuse angle is 120-165 degrees. The obtuse angle outlet and the straight inlet are connected to the inner side wall of the shell.

3. The reversing structure for a three-way valve according to claim 1, characterized in that: A group of evenly distributed circular holes are respectively provided on the upper and lower end surfaces of the cylindrical body of the shell.

4. The reversing structure for a three-way valve according to claim 1, characterized in that: The valve core body is a cylinder, and the size of the cylinder matches that of the cylindrical barrel of the shell, so that after the shell and the rotating valve core are matched, the cavity in the cylindrical barrel is filled.

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