Discharging valve suitable for negative pressure bin

Abstract

The discharging valve comprises a top valve part and a bottom valve part, the top valve part comprises a top valve shell, a top valve cavity is formed in the top valve shell, a top valve feeding port is formed in the top of the top valve cavity, and the top valve feeding port is provided with a switch valve assembly in a matched mode; the bottom valve part comprises a bottom valve shell, a middle partition plate is arranged in the bottom valve shell, an upper valve cavity is formed above the middle partition plate, and a bottom valve feeding port is provided with a first valve assembly in a matched mode. A lower valve cavity is formed below the middle partition plate, a middle discharging port is formed in the middle partition plate and provided with a second valve assembly in a matched mode, and a pressure balance mechanism is arranged on the bottom valve shell. Conveying of materials is controlled through the switch valve assembly, the first valve assembly and the second valve assembly, the materials with small density can be smoothly discharged out of the negative pressure bin through internal and external pressure difference balance, and the problem that due to the fact that a discharging port of the negative pressure bin is prone to being blocked, the negative pressure bin cannot discharge the materials is effectively solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, and particularly relates to a discharge valve applicable to a negative pressure bin. Background Art

[0002] In a pressure circuit, a negative pressure bin is often provided for applications in negative pressure scenarios. In the traditional discharging method of a negative pressure bin, a valve is usually designed at the discharge port of the negative pressure bin to control the discharge. Since the pressure in the negative pressure bin is usually less than the external air pressure, if only a simple closed discharge valve is installed below the negative pressure bin, some dust materials with relatively low density cannot flow out of the bin. Because the external air pressure is greater than the air pressure in the negative pressure bin, once the discharge valve is opened, the external air will rush into the negative pressure bin rapidly. Materials with relatively high density can flow backward and fall, while materials with relatively low density will be blown up. After the discharge valve is closed, the materials with relatively low density may fall into the negative pressure bin again. In this way, after long-term operation, the dust materials are likely to block the discharge port of the negative pressure bin, resulting in the inability of the negative pressure bin to discharge materials. Therefore, there is an urgent need for a discharge valve to solve the problems existing in the prior art. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a discharge valve applicable to a negative pressure bin to solve the above problems existing in the prior art.

[0004] To achieve the above purpose, the utility model adopts the following technical scheme: A discharge valve applicable to a negative pressure bin includes a top valve part and a bottom valve part. The top valve part includes a top valve housing. A top valve cavity is provided inside the top valve housing. A top valve feed port for communicating with the negative pressure bin is provided at the top of the top valve cavity. The top valve feed port is equipped with a switch valve assembly. A top valve discharge port is provided at the bottom of the top valve cavity. The bottom valve part includes a bottom valve housing. The bottom valve housing is connected to the top valve housing. An intermediate partition plate is provided inside the bottom valve housing. An upper valve cavity is provided above the intermediate partition plate. A bottom valve feed port communicating with the top valve discharge port is provided at the top of the upper valve cavity. The bottom valve feed port is equipped with a first valve assembly. A lower valve cavity is provided below the intermediate partition plate. An intermediate discharge port for communicating the upper valve cavity and the lower valve cavity is formed on the intermediate partition plate. The intermediate discharge port is equipped with a second valve assembly. A bottom valve discharge port is provided at the bottom of the lower valve cavity. A pressure balance mechanism is provided on the bottom valve housing. The pressure balance mechanism is used to communicate the upper valve cavity with the external atmosphere.

[0005] As an optional implementation manner of the above technical scheme, the switch valve assembly includes a rotary valve plate, a rotary shaft, and a driving member. The rotary shaft is rotatably arranged on the top valve housing. One end of the rotary shaft is connected to the rotary valve plate, and the other end of the rotary shaft is connected to the driving member. The driving member is used to drive the rotary valve plate to rotate through the rotary shaft, so as to control the opening and closing of the top valve feed port.

[0006] As an alternative implementation of the above technical solution, the driving member includes a driving handwheel, and the driving handwheel is connected to the rotating shaft.

[0007] As an alternative implementation of the above technical solution, the first valve assembly includes a first flip valve plate, a first flip arm, and a first driving mechanism. One end of the first flip arm is connected to the first flip valve plate, and the other end of the first flip arm is connected to the first driving mechanism. The first driving mechanism is configured to drive the first flip valve plate to flip through the first flip arm, thereby controlling the opening and closing of the bottom valve feed port.

[0008] As an alternative implementation of the above technical solution, the first driving mechanism includes a first driving motor and a first speed reducer. The first driving motor is connected to the first speed reducer, and the output shaft of the first speed reducer is connected to the first flip arm.

[0009] As an alternative implementation of the above technical solution, the first flip valve plate is disposed at the bottom of the bottom valve feed port, and a first sealing ring is provided between the first flip valve plate and the bottom valve feed port.

[0010] As an alternative implementation of the above technical solution, the second valve assembly includes a second flip valve plate, a second flip arm, and a second driving mechanism. One end of the second flip arm is connected to the second flip valve plate, and the other end of the second flip arm is connected to the second driving mechanism. The second driving mechanism is configured to drive the second flip valve plate to flip through the second flip arm, thereby controlling the opening and closing of the intermediate discharge port.

[0011] As an alternative implementation of the above technical solution, the second driving mechanism includes a second driving motor and a second speed reducer. The second driving motor is connected to the second speed reducer, and the output shaft of the second speed reducer is connected to the second flip arm.

[0012] As an alternative implementation of the above technical solution, the second flip valve plate is disposed at the bottom of the intermediate discharge port, and a second sealing ring is provided between the second flip valve plate and the intermediate discharge port.

[0013] As an alternative implementation of the above technical solution, the side wall of the bottom valve housing is provided with a first inspection opening and a second inspection opening. The first inspection opening communicates with the upper valve chamber, and the first inspection opening is provided with a first cover plate; the second inspection opening communicates with the lower valve chamber, and the second inspection opening is provided with a second cover plate.

[0014] As an alternative implementation of the above technical solution, the pressure balancing mechanism includes an intake balancing valve, and the intake balancing valve communicates with the upper valve chamber.

[0015] As an alternative implementation of the above technical solution, the bottom of the bottom valve housing is in an inverted conical shape to guide the material in the lower valve chamber to be discharged from the bottom valve discharge port.

[0016] The beneficial effects of the present utility model are as follows:

[0017] The present utility model controls the conveying of materials by using a switching valve assembly, a first valve assembly, and a second valve assembly. Through the balance of internal and external pressure differences, materials with a relatively small density can be smoothly discharged from the negative pressure bin, effectively solving the problem that the discharge port of the negative pressure bin is easily blocked, resulting in the inability to discharge materials from the negative pressure bin. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of a discharge valve in an implementation manner of the present utility model;

[0019] Figure 2 is a schematic structural diagram of the top valve part in an implementation manner of the present utility model;

[0020] Figure 3 is a schematic structural diagram of the switching valve assembly in an implementation manner of the present utility model;

[0021] Figure 4 is a schematic structural diagram of the first valve assembly in an implementation manner of the present utility model.

[0022] In the figure: 1 - top valve housing; 2 - top valve chamber; 3 - top valve feed port; 4 - switching valve assembly; 5 - top valve discharge port; 6 - bottom valve housing; 7 - intermediate partition plate; 8 - upper valve chamber; 9 - bottom valve feed port; 10 - first valve assembly; 11 - lower valve chamber; 12 - intermediate discharge port; 13 - second valve assembly; 14 - bottom valve discharge port; 15 - rotary valve plate; 16 - rotary shaft; 17 - driving handwheel; 18 - first flip valve plate; 19 - first flip arm; 20 - first driving motor; 21 - first speed reducer; 22 - first inspection port; 23 - second inspection port; 24 - first cover plate; 25 - second cover plate; 26 - intake balance valve. Detailed Implementation Manner

[0023] As Figures 1 - 4 shown, this embodiment provides a discharge valve applicable to a negative pressure bin, including a top valve part and a bottom valve part. The top valve part is used to connect with the negative pressure bin, and the bottom valve part is arranged below the top valve part and is used to connect with a material collection device.

[0024] As Figure 1As shown, the top valve part includes a top valve housing 1. Inside the top valve housing 1, there is a top valve chamber 2. At the top of the top valve chamber 2, there is a top valve feed inlet 3 for communicating with the negative pressure bin. The top valve feed inlet 3 is equipped with a switch valve assembly 4. At the bottom of the top valve chamber 2, there is a top valve discharge outlet 5. The switch valve assembly 4 is used to control the opening and closing of the top valve feed inlet 3. After the switch valve assembly 4 is opened, the materials in the negative pressure bin can enter the top valve chamber 2 through the top valve feed inlet 3.

[0025] As Figure 2 shown, the bottom valve part includes a bottom valve housing 6. The bottom valve housing 6 is connected to the top valve housing 1. Inside the bottom valve housing 6, there is an intermediate partition plate 7. Above the intermediate partition plate 7, there is an upper valve chamber 8. At the top of the upper valve chamber 8, there is a bottom valve feed inlet 9 communicating with the top valve discharge outlet 5. The bottom valve feed inlet 9 is equipped with a first valve assembly 10. The first valve assembly 10 is used to control the opening and closing of the bottom valve feed inlet 9. After the first valve assembly 10 is opened, the materials in the top valve chamber 2 can enter the upper valve chamber 8 through the bottom valve feed inlet 9.

[0026] Below the intermediate partition plate 7, there is a lower valve chamber 11. On the intermediate partition plate 7, there is an intermediate discharge outlet 12 for communicating the upper valve chamber 8 and the lower valve chamber 11. The intermediate discharge outlet 12 is equipped with a second valve assembly 13. At the bottom of the lower valve chamber 11, there is a bottom valve discharge outlet 14. The second valve assembly 13 is used to control the opening and closing of the intermediate discharge outlet 12. After the second valve assembly 13 is opened, the materials in the upper valve chamber 8 can enter the lower valve chamber 11 through the intermediate discharge outlet 12, and then enter the material collection device through the bottom valve discharge outlet 14.

[0027] On the bottom valve housing 6, there is a pressure balance mechanism. The pressure balance mechanism is used to connect the upper valve chamber 8 with the outside atmosphere, which is beneficial to the materials in the upper valve chamber 8 entering the lower valve chamber 11.

[0028] The utility model controls the conveying of materials by using the switch valve assembly 4, the first valve assembly 10 and the second valve assembly 13. Through the balance of internal and external pressure differences, the materials with smaller density can be smoothly discharged from the negative pressure bin, effectively solving the problem that the discharge outlet of the negative pressure bin is easily blocked, resulting in the inability of the negative pressure bin to discharge materials.

[0029] As Figure 2 and Figure 3As shown in the figure, specifically, the switch valve assembly 4 includes a rotary valve plate 15, a rotary shaft 16 and a driving member. The rotary shaft 16 is rotatably arranged on the top valve housing 1. One end of the rotary shaft 16 is connected to the rotary valve plate 15, and the other end of the rotary shaft 16 is connected to the driving member. The driving member is used to drive the rotary valve plate 15 to rotate through the rotary shaft 16, so as to control the opening and closing of the top valve feed port 3. The rotary valve plate 15 is fan-shaped and is used to close the top valve feed port 3. Among them, the driving member includes a driving handwheel 17, and the driving handwheel 17 is connected to the rotary shaft 16. The driving handwheel 17 drives the rotary valve plate 15 to rotate reciprocally to control the opening and closing of the top valve feed port 3. The rotary valve plate 15 plays a total cut-off role. When closed, the material is cut off in the negative pressure bin. When the rotary valve plate 15 works normally, the flow rate of the top valve feed port 3 can be adjusted.

[0030] As Figure 4 shown, the first valve assembly 10 includes a first flip valve plate 18, a first flip arm 19 and a first driving mechanism. One end of the first flip arm 19 is connected to the first flip valve plate 18, and the other end of the first flip arm 19 is connected to the first driving mechanism. The first driving mechanism is used to drive the first flip valve plate 18 to flip through the first flip arm 19, so as to control the opening and closing of the bottom valve feed port 9. Specifically, the first driving mechanism includes a first driving motor 20 and a first speed reducer 21. The first driving motor 20 is connected to the first speed reducer 21, and the output shaft of the first speed reducer 21 is connected to the first flip arm 19. The first flip valve plate 18 is arranged at the bottom of the bottom valve feed port 9, and a first sealing ring is arranged between the first flip valve plate 18 and the bottom valve feed port 9. The first sealing ring is fixed at the bottom of the bottom valve feed port 9. When the first driving motor 20 drives the first flip valve plate 18 to flip upward, the bottom valve feed port 9 can be closed. When the first driving motor 20 drives the first flip valve plate 18 to flip downward, the bottom valve feed port 9 can be opened, so that the material in the top valve cavity 2 enters the upper valve cavity 8.

[0031] The second valve assembly 13 adopts the same structure as the first valve assembly 10. Specifically, the second valve assembly 13 includes a second flip valve plate, a second flip arm, and a second drive mechanism. One end of the second flip arm is connected to the second flip valve plate, and the other end of the second flip arm is connected to the second drive mechanism. The second drive mechanism is used to drive the second flip valve plate to flip through the second flip arm, so as to control the opening and closing of the intermediate discharge port 12. The second drive mechanism includes a second drive motor and a second speed reducer. The second drive motor is connected to the second speed reducer, and the output shaft of the second speed reducer is connected to the second flip arm. The second flip valve plate is arranged at the bottom of the intermediate discharge port 12, and a second sealing ring is arranged between the second flip valve plate and the intermediate discharge port 12. The second sealing ring is fixed at the bottom of the intermediate discharge port 12. When the second drive motor drives the second flip valve plate to flip upward, the intermediate discharge port 12 can be closed. When the second drive motor drives the second flip valve plate to flip downward, the intermediate discharge port 12 can be opened, so that the material in the upper valve cavity 8 enters the lower valve cavity 11. Both the first valve assembly 10 and the second valve assembly 13 are electrically driven, featuring fast speed and short valve opening and closing time. Preferably, the bottom of the bottom valve housing 6 is in an inverted cone shape to guide the material in the lower valve cavity 11 to be discharged from the bottom valve discharge port 14 into the material collection device.

[0032] The side wall of the bottom valve housing 6 is provided with a first inspection port 22 and a second inspection port 23. The first inspection port 22 communicates with the upper valve cavity 8, and the first inspection port 22 is equipped with a first cover plate 24, and a handle is arranged on the first cover plate 24. The second inspection port 23 communicates with the lower valve cavity 11, and the second inspection port 23 is equipped with a second cover plate 25, and a handle is arranged on the first cover plate 24. This design makes it easy to carry out the inspection work of the bottom valve part, thereby improving the actual service life of the overall device.

[0033] In a specific embodiment, the pressure balance mechanism includes an intake air balance valve 26, and the intake air balance valve 26 communicates with the upper valve cavity 8, which is beneficial to discharging the material in the upper valve cavity 8.

[0034] In actual work, first install the top valve housing 1 at the ash discharge port of the negative pressure bin; first close the first valve assembly 10, then open the switch valve assembly 4, so that the material in the negative pressure bin enters the top valve chamber 2. Then close the switch valve assembly 4, then open the first valve assembly 10, and close the second valve assembly 13, so that the material in the top valve chamber 2 will directly enter the upper valve chamber 8 under the action of gravity. The first valve assembly 10 opens and stays for 0.5 seconds before closing. Its specific opening and staying time is determined according to actual needs; after closing the first valve assembly 10, open the air intake balance valve 26, the air intake balance valve 26 connects the upper valve chamber 8 with the outside atmosphere, and then open the second valve assembly 13, so that the material enters the lower valve chamber 11, and then enters the material collection device through the bottom valve outlet 14. Repeat the above operation process, so that the material will flow out of the negative pressure bin smoothly.

[0035] In the description of the present utility model, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, and may be fixedly connected, detachably connected, or integrated; may be mechanically connected or electrically connected; may be directly connected or indirectly connected through an intermediate medium, may be the internal connection of two components or the interaction relationship between two components. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood. In addition, the specific features, structures, etc. described in the embodiments are included in at least one embodiment. In the absence of mutual contradictions, those skilled in the art may combine the features of different embodiments. The scope of protection of the present utility model is not limited to the above-mentioned specific embodiments. According to the basic technical concept of the present utility model, the embodiments that can be associated with by ordinary technicians in this field without creative work all belong to the scope of protection of the present utility model.

Claims

1. A discharge valve suitable for a negative pressure bin, characterized in that: The invention comprises a top valve part and a bottom valve part, wherein the top valve part comprises a top valve housing (1), wherein a top valve cavity (2) is provided inside the top valve housing (1), wherein a top valve feed port (3) for communicating with a negative pressure chamber is provided at the top of the top valve cavity (2), wherein a switch valve assembly (4) is provided at the top valve feed port (3), and a top valve discharge port (5) is provided at the bottom of the top valve cavity (2); wherein the bottom valve part comprises a bottom valve housing (6), wherein the bottom valve housing (6) is connected to the top valve housing (1), wherein an intermediate partition plate (7) is provided inside the bottom valve housing (6), wherein an upper valve cavity (8) is provided above the intermediate partition plate (7), wherein the upper valve cavity (8) A bottom valve feed port (9) connected to the top valve discharge port (5) is provided at the top of the valve body, and the bottom valve feed port (9) is provided with a first valve assembly (10); a lower valve cavity (11) is provided below the middle partition plate (7), and a middle discharge port (12) for connecting the upper valve cavity (8) and the lower valve cavity (11) is provided on the middle partition plate (7), and the middle discharge port (12) is provided with a second valve assembly (13); a bottom valve discharge port (14) is provided at the bottom of the lower valve cavity (11); a pressure balancing mechanism is provided on the bottom valve housing (6), and the pressure balancing mechanism is used to connect the upper valve cavity (8) with the outside atmosphere.

2. The discharge valve suitable for negative pressure bin according to claim 1, characterized in that: The switch valve assembly (4) comprises a rotary valve plate (15), a rotary shaft (16) and a driving member. The rotary shaft (16) is rotatably arranged on the top valve housing (1). One end of the rotary shaft (16) is connected to the rotary valve plate (15), and the other end of the rotary shaft (16) is connected to the driving member. The driving member is used to drive the rotary valve plate (15) to rotate through the rotary shaft (16), thereby controlling the opening and closing of the top valve feed port (3).

3. The discharge valve suitable for negative pressure bin according to claim 2, characterized in that: The driving member comprises a driving hand wheel (17), and the driving hand wheel (17) is connected to the rotating shaft (16).

4. The discharge valve suitable for negative pressure bin according to claim 1, characterized in that: The first valve assembly (10) comprises a first flip valve plate (18), a first flip arm (19) and a first driving mechanism, wherein one end of the first flip arm (19) is connected to the first flip valve plate (18), and the other end of the first flip arm (19) is connected to the first driving mechanism, and the first driving mechanism is used to drive the first flip valve plate (18) to flip through the first flip arm (19), thereby controlling the opening and closing of the bottom valve feed port (9).

5. The discharge valve suitable for negative pressure bin according to claim 4, characterized in that: The first driving mechanism comprises a first driving motor (20) and a first reducer (21), the first driving motor (20) is connected to the first reducer (21), and the output shaft of the first reducer (21) is connected to the first flip arm (19); the first flip valve plate (18) is arranged at the bottom of the bottom valve feed port (9), and a first sealing ring is provided between the first flip valve plate (18) and the bottom valve feed port (9).

6. The discharge valve suitable for negative pressure bin according to claim 1, characterized in that: The second valve assembly (13) comprises a second flip valve plate, a second flip arm and a second driving mechanism, wherein one end of the second flip arm is connected to the second flip valve plate, and the other end of the second flip arm is connected to the second driving mechanism, and the second driving mechanism is used to drive the second flip valve plate to flip through the second flip arm, thereby controlling the opening and closing of the middle discharge port (12).

7. The discharge valve suitable for negative pressure bin according to claim 6, characterized in that: The second driving mechanism comprises a second driving motor and a second reducer, the second driving motor is connected to the second reducer, and the output shaft of the second reducer is connected to the second flip arm; the second flip valve plate is arranged at the bottom of the middle discharge port (12), and a second sealing ring is arranged between the second flip valve plate and the middle discharge port (12).

8. The discharge valve suitable for negative pressure bin according to claim 1, characterized in that: The side wall of the bottom valve housing (6) is provided with a first inspection port (22) and a second inspection port (23); the first inspection port (22) is connected to the upper valve chamber (8), and the first inspection port (22) is provided with a first cover plate (24); the second inspection port (23) is connected to the lower valve chamber (11), and the second inspection port (23) is provided with a second cover plate (25).

9. The discharge valve suitable for negative pressure bin according to claim 1, characterized in that: The pressure balancing mechanism comprises an air intake balancing valve (26), and the air intake balancing valve (26) is communicated with the upper valve chamber (8).

10. The discharge valve suitable for negative pressure bin according to claim 1, characterized in that: The bottom of the bottom valve housing (6) is in an inverted cone shape to guide the material in the lower valve cavity (11) to be discharged from the bottom valve outlet (14).

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