Miniature rotary valve

Abstract

A miniature rotary valve relates to the technical field of feeding devices and comprises a valve body and a rotor, a mounting hole communicated with an inner cavity is horizontally formed in one side of the valve body, the rotor is horizontally and rotatably mounted in the valve body through the mounting hole, a gland for sealing the mounting hole is arranged on the outer side wall of the valve body, and a center shaft is connected to the rotor. And the gland is provided with an air seal structure for sealing the area between the inner hole and the central shaft. The feeding valve solves the problems that in the prior art, a feeding valve is limited by structural characteristics and cannot be miniaturized, and when the requirement for air locking of a rotary valve is high, the machining difficulty is greatly increased.

Description

Technical Field

[0001] The utility model relates to the technical field of feeding devices, in particular to a micro rotary valve. Background Art

[0002] Rotary feed valve is a special equipment used in powder (powder, granular material, powder-particle mixture) conveying system for unloading, metering, dust removal, quantitative conveying, mixing and packaging. It is widely used in chemical, environmental protection, petroleum, metallurgy, refractory materials, electricity, cement, plastics, food and medicine industries.

[0003] The traditional rotary valve rotates an equally divided impeller in the housing through the transmission of the motor and reducer. The material from the upper silo or feeding device of the housing is filled into the cavity of the impeller. The material is discharged to the lower part of the housing as the impeller rotates. The material can be discharged to the downstream evenly and continuously according to the requirements of the conveying system.

[0004] As the existing devices are used, the shortcomings of this technology are gradually exposed, mainly in the following aspects:

[0005] The existing device, due to the limitation of structural characteristics, cannot be miniaturized, and when the locking requirements of the rotary valve are high, the processing difficulty is greatly increased.

[0006] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0007] In view of the defects in the prior art, the utility model solves the problem that the feeding valve in the traditional technology is limited by the structural characteristics and cannot be miniaturized, and when the locking requirements of the rotary valve are high, the processing difficulty is greatly increased.

[0008] In order to solve the above problems, the utility model provides the following technical solutions:

[0009] A micro rotary valve comprises a valve body and a rotor. A mounting hole communicating with an inner cavity is horizontally opened on one side of the valve body. The rotor is horizontally mounted in the valve body by utilizing the mounting hole. A pressure cover for closing the mounting hole is provided on the outer wall of the valve body. A central axis is connected to the rotor, and an air sealing structure is provided on the pressure cover for sealing the area between its inner hole and the central axis.

[0010] As an optimized solution, the air sealing structure includes a first sealing ring and a second sealing ring which are arranged in parallel along the axial direction of the gland, and a sealing air channel is provided in the area between the first sealing ring and the second sealing ring.

[0011] As an optimized solution, the sealed air duct includes an air inlet duct radially opened on the pressure cover, the outlet end of the air inlet duct is connected to an intermediate air duct opened along the axial direction, the outlet end of the intermediate air duct is connected to an air outlet duct opened along the radial direction, an annular sealing groove is opened on the inner hole of the pressure cover, and the outlet end of the air outlet duct is connected to the annular sealing groove.

[0012] As an optimized solution, a material distribution groove is provided on the upper periphery of the rotor, and the material distribution groove is arranged to be gradually reduced from the outside to the inside along the axial cross-section direction.

[0013] As an optimized solution, the material distribution trough includes a V-shaped groove, and two V-shaped grooves are evenly distributed.

[0014] As an optimized solution, the material distribution trough includes four first trapezoidal troughs that are evenly distributed.

[0015] As an optimized solution, the material distribution trough includes a second trapezoidal groove, the axial cross-sectional area of ​​the second trapezoidal groove is larger than that of the first trapezoidal groove, and there are five evenly distributed second trapezoidal grooves.

[0016] As an optimized solution, a feed channel connected to the mounting hole is provided at the upper end of the valve body, and the feed channel is arranged to be gradually reduced from top to bottom along the axial cross-section direction.

[0017] As an optimized solution, a discharge channel connected to the mounting hole is provided at the lower end of the valve body, and the discharge channel is gradually expanded from top to bottom along the axial cross-section direction.

[0018] As an optimized solution, the upper end of the valve body is connected to a feed quick-release chuck by means of a fixed disk, and the feed quick-release chuck is communicated with the feed channel.

[0019] As an optimized solution, the lower end of the valve body is connected to a discharge quick-release chuck by means of a fixed disk, and the discharge quick-release chuck is communicated with the discharge channel.

[0020] As an optimized solution, a power device is fixedly connected to the end wall of the gland, and the central axis is connected to the output end of the power device.

[0021] As an optimized solution, an air inlet nozzle connected to the air inlet duct is fixedly connected to the outer wall of the gland.

[0022] Compared with the prior art, the beneficial effects of the utility model are:

[0023] The cantilever structure eliminates the need for rotating supports such as bearings. The structure is simple and easy to disassemble and assemble, and the required rotor can be quickly replaced according to demand.

[0024] The setting of the air sealing structure can achieve good sealing performance and realize the air locking function of the rotary valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0026] Figure 1 It is a schematic diagram of the structure of the utility model;

[0027] Figure 2 It is a structural schematic diagram of the axial cross section of the valve body of the utility model;

[0028] Figure 3 This is a schematic diagram of the structure of the V-shaped groove of the utility model;

[0029] Figure 4 This is a schematic diagram of the structure of the first trapezoidal groove of the utility model;

[0030] Figure 5 It is a structural schematic diagram of the second trapezoidal groove of the utility model.

[0031] In the figure: 1-valve body; 2-mounting hole; 3-rotor; 4-pressure cover; 5-distribution trough; 6-feed quick-release chuck; 7-discharge quick-release chuck; 8-feed channel; 9-discharge channel; 10-air inlet; 11-intermediate air channel; 12-air outlet; 13-annular sealing groove; 14-first sealing ring; 15-second sealing ring; 16-power device; 17-inlet nozzle; 18-V-shaped groove; 19-first trapezoidal groove; 20-second trapezoidal groove; 21-center axis. DETAILED DESCRIPTION

[0032] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0033] like Figures 1 to 5 As shown, the micro rotary valve includes a valve body 1 and a rotor 3. A mounting hole 2 communicating with the inner cavity is horizontally opened on one side of the valve body 1. The rotor 3 is horizontally rotatably mounted in the valve body 1 using the mounting hole 2. A pressure cover 4 for closing the mounting hole 2 is provided on the outer wall of the valve body 1. A central axis 21 is connected to the rotor 3, and an air sealing structure for sealing the area between its inner hole and the central axis 21 is provided on the pressure cover 4.

[0034] The central shaft 21 is connected to the inner hole of the rotor 3 through a keyway structure.

[0035] The air sealing structure comprises a first sealing ring 14 and a second sealing ring 15 which are arranged in parallel along the axial direction of the gland 4 , and a sealing air passage is provided in the area between the first sealing ring 14 and the second sealing ring 15 .

[0036] The first sealing ring 14 is a lip-type sealing ring, and the second sealing ring 15 is an O-type sealing ring.

[0037] The sealed air duct includes an air inlet duct 10 radially opened on the pressure cover 4, the outlet end of the air inlet duct 10 is connected to an intermediate air duct 11 opened along the axial direction, the outlet end of the intermediate air duct 11 is connected to an air outlet duct 12 opened along the radial direction, an annular sealing groove 13 is opened on the inner hole of the pressure cover 4, and the outlet end of the air outlet duct 12 is connected to the annular sealing groove 13.

[0038] A material distribution groove 5 is arranged on the upper periphery of the rotor 3, and the material distribution groove 5 is arranged to be gradually reduced from the outside to the inside along the axial cross-section direction.

[0039] The material distribution trough 5 includes V-shaped grooves 18, and two V-shaped grooves 18 are evenly distributed.

[0040] The material distribution trough 5 includes four first trapezoidal grooves 19 , which are evenly distributed.

[0041] The material distribution trough 5 comprises a second trapezoidal groove 20 , the axial cross-sectional area of ​​the second trapezoidal groove 20 is larger than that of the first trapezoidal groove 19 , and there are five second trapezoidal grooves 20 evenly distributed.

[0042] The size, structure and number of the feed trough 5 are designed to obtain different feed amounts at a certain rotation speed.

[0043] The upper end of the valve body 1 is provided with a feed channel 8 connected to the mounting hole 2. The feed channel 8 is gradually contracted from top to bottom along the axial section direction; the feed channel 8 is gradually expanded from top to bottom along the radial section direction.

[0044] The lower end of the valve body 1 is provided with a discharge channel 9 connected to the mounting hole 2. The discharge channel 9 is gradually expanded from top to bottom along the axial section direction; and the discharge channel 9 is gradually contracted from top to bottom along the radial section direction.

[0045] The upper end of the valve body 1 is connected with a feed quick-release chuck 6 by means of a fixed disk, and the feed quick-release chuck 6 is communicated with a feed channel 8 .

[0046] The lower end of the valve body 1 is connected with a discharge quick-install chuck 7 by means of a fixed plate, and the discharge quick-install chuck 7 is communicated with a discharge channel 9 .

[0047] A power device 16 is fixedly connected to the end wall of the gland 4 , and the central shaft 21 is connected to the output end of the power device 16 .

[0048] An air inlet nozzle 17 connected to the air inlet duct 10 is fixedly connected to the outer wall of the gland 4 .

[0049] The working principle of this device is:

[0050] The cantilever structure eliminates the need for rotating support parts such as bearings, has a simple structure, is easy to disassemble and assemble, and can quickly replace the required rotor 3 according to demand;

[0051] The setting of the air sealing structure can achieve good sealing performance and realize the air locking function of the rotary valve.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. Micro rotary valve, characterized by: The invention comprises a valve body (1) and a rotor (3), wherein a mounting hole (2) communicating with an inner cavity is horizontally opened on one side of the valve body (1), and the rotor (3) is horizontally rotatably mounted in the valve body (1) by utilizing the mounting hole (2), and a pressure cover (4) for closing the mounting hole (2) is provided on the outer wall of the valve body (1), a central axis (21) is connected to the rotor (3), and an air sealing structure for sealing the area between the inner hole thereof and the central axis (21) is provided on the pressure cover (4).

2. The micro rotary valve according to claim 1, characterized in that: The air-sealing structure comprises a first sealing ring (14) and a second sealing ring (15) which are arranged in parallel along the axial direction of the gland (4); a sealing air passage is provided in the area between the first sealing ring (14) and the second sealing ring (15).

3. The micro rotary valve according to claim 2, characterized in that: The sealed air passage comprises an air inlet passage (10) radially opened on the pressure cover (4); the outlet end of the air inlet passage (10) is connected to an intermediate air passage (11) opened axially; the outlet end of the intermediate air passage (11) is connected to an air outlet passage (12) opened radially; an annular sealing groove (13) is opened on the inner hole of the pressure cover (4); the outlet end of the air outlet passage (12) is connected to the annular sealing groove (13).

4. The micro rotary valve according to claim 1, characterized in that: A material distribution groove (5) is arranged on the upper periphery of the rotor (3), and the material distribution groove (5) is arranged in a gradually contracting manner from the outside to the inside along the axial cross-section direction.

5. The micro rotary valve according to claim 4, characterized in that: The material distribution trough (5) comprises a V-shaped groove (18), and two V-shaped grooves (18) are evenly distributed.

6. The micro rotary valve according to claim 4, characterized in that: The material distribution trough (5) comprises a first trapezoidal groove (19), and the first trapezoidal groove (19) is evenly distributed in four numbers.

7. The micro rotary valve according to claim 6, characterized in that: The material distribution trough (5) comprises a second trapezoidal groove (20), the axial cross-sectional area of ​​the second trapezoidal groove (20) is larger than that of the first trapezoidal groove (19), and there are five evenly distributed second trapezoidal grooves (20).

8. The micro rotary valve according to claim 1, characterized in that: The upper end of the valve body (1) is provided with a feed channel (8) connected to the mounting hole (2), and the feed channel (8) is arranged in a gradually contracting manner from top to bottom along the axial cross-section direction; the lower end of the valve body (1) is provided with a discharge channel (9) connected to the mounting hole (2), and the discharge channel (9) is arranged in a gradually expanding manner from top to bottom along the axial cross-section direction.

9. The micro rotary valve according to claim 8, characterized in that: The upper end of the valve body (1) is connected to a feed quick-release chuck (6) by means of a fixed disk, and the feed quick-release chuck (6) is in communication with the feed channel (8); the lower end of the valve body (1) is connected to a discharge quick-release chuck (7) by means of a fixed disk, and the discharge quick-release chuck (7) is in communication with the discharge channel (9).

10. The micro rotary valve according to claim 1, characterized in that: A power device (16) is fixedly connected to the end wall of the gland (4), and the central shaft (21) is connected to the output end of the power device (16).

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