A discharge valve

Abstract

The present invention relates to a discharge valve, comprising a valve body, a main shaft rotor for discharging and a cleaning rotor for cleaning the main shaft rotor, a driving device, a transmission mechanism and an air-sealing structure; the main shaft rotor is connected to the driving device and the transmission mechanism through a driving main shaft, the cleaning rotor is connected to the transmission mechanism through a driven shaft, the driving device drives the main shaft rotor to rotate and makes the cleaning rotor and the main shaft rotor rotate synchronously through the transmission mechanism; the air-sealing structure comprises a first and a second air-sealing structure respectively arranged at the connection between the driving main shaft, the driven shaft and the valve body, the two air-sealing structures adopt the same structure, the first sealing structure comprises a pair of sealing rings sleeved on the driving main shaft, a sealing cavity formed by a pair of sealing rings and a ventilation duct opened on the valve body and connected to the sealing cavity. The present invention can realize completely closed discharge, effectively block the contact between the material and the pollutants and the sealing ring, and reduce the possibility of polluting the material during the discharge process.

Description

Technical Field

[0001] The invention belongs to the technical field of material (powder) conveying equipment, and in particular relates to a discharge valve. Background Art

[0002] Material (powder) transportation can ensure timely material turnover and rational use of materials. The discharge of powder materials after transportation in the food, pharmaceutical and other industries is also particularly important. The existing powder material discharge valve can achieve quantitative discharge of materials and is easy to use.

[0003] At present, when the valve discs of ordinary discharge valves are conveying powder materials, powder will remain between the valve discs and cannot be cleaned. After a long time, the residual powder may agglomerate and affect the conveying capacity of the discharge valve, and may even agglomerate and fall into the powder to affect the quality of the product. At the same time, for materials with high viscosity, due to their certain viscosity, they are easy to stick to the valve disc during the discharge (dropping) process and cannot be discharged, affecting the quantity of the next cycle. Excessive accumulation of materials is easy to cause blockage, making the valve disc unable to operate, causing great damage to the equipment and seriously affecting the material conveying effect.

[0004] Chinese patent application 201820110566.3 discloses a sticky material discharge valve, which adopts a built-in rotating scraper to ensure that the rotating scraper can clean up the material adhered to the valve disc, ensure the normal subsequent material discharge, and achieve the continuity of material discharge and the safe use of the equipment; although the sticky material discharge valve in this patent application can achieve continuous discharge of materials with high viscosity, the seals at both ends of the rotating scraper and the valve disc in the sticky material discharge valve cannot completely isolate the contact with the material, which may cause contamination in the pharmaceutical and food industries; in addition, the sticky material discharge valve in this patent application has the problem that the structure occupies a relatively large space, is not compact enough, and cannot achieve rapid disassembly of the rotating scraper and the valve disc, and cannot achieve dead-angle cleaning of the internal cavity. Summary of the invention

[0005] The purpose of the present invention is to provide a discharge valve to solve at least one technical problem existing in the prior art. The discharge valve of the present invention can self-clean the interior of the equipment during the material feeding and discharging process, and can also achieve completely closed discharge, effectively block pollutants from entering the sealing cavity and effectively prevent the contact between the material and the sealing ring, thereby reducing the possibility of contamination of the material during the discharge process.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a discharge valve, comprising a valve body with a feed port and a discharge port arranged relatively to each other, a spindle rotor for discharging and a cleaning rotor for cleaning the spindle rotor arranged inside the valve body, a driving device for driving the spindle rotor, a transmission mechanism and an air-sealing structure; the spindle rotor is connected to the driving device and the transmission mechanism through a driving spindle, the cleaning rotor is connected to the transmission mechanism through a driven shaft, and the cleaning rotor and the spindle rotor rotate synchronously through the transmission mechanism; the air-sealing structure comprises a first air-sealing structure arranged at the connection between the driving spindle and the valve body A structure and a second air-sealing structure arranged at the connection between the driven shaft and the valve body; the first air-sealing structure includes a first sealing ring and a second sealing ring sleeved on the driving main shaft, a first sealing cavity is formed between the first sealing ring and the second sealing ring, the second air-sealing structure includes a third sealing ring and a fourth sealing ring sleeved on the driven shaft, a second sealing cavity is formed between the third sealing ring and the fourth sealing ring; a first ventilation duct and a second ventilation duct are opened on the valve body, one end of the first ventilation duct and the second ventilation duct are respectively connected to the first sealing cavity and the second sealing cavity, and the other end is used to connect to the air source.

[0007] Preferably, the driving device and the transmission mechanism are arranged on the same side of the main shaft rotor and the cleaning rotor.

[0008] Preferably, the valve body includes a first shell part and a second shell part from left to right, the transmission mechanism is arranged inside the first shell part, the spindle rotor and the cleaning rotor are arranged inside the second shell part, the first shell part is connected to the left end of the second shell part, and the first shell part and the second shell part are separated by a left end cover arranged at the left end of the second shell part; the spindle rotor is installed at one end of the driving spindle, and the transmission mechanism and the driving device are installed in sequence at the other end through the left end cover of the second shell part; the cleaning rotor is installed at one end of the driven shaft, and the transmission mechanism is installed at the other end through the left end cover of the second shell part.

[0009] Preferably, the first ventilation duct and the second ventilation duct are opened in the left end cover of the second outer shell part; the first sealing ring and the third sealing ring are respectively arranged on the right side of the second sealing ring and the fourth sealing ring, and sealing retaining rings are arranged on the circumference of the first sealing ring and the third sealing ring.

[0010] Preferably, the feed port and the discharge port are respectively arranged at the top and the bottom of the second housing portion; and / or the driving spindle and the driven shaft are both fixed to the first housing portion through bearings.

[0011] Preferably, the right end of the second shell portion is provided with a right end cover detachably connected to the second shell portion; the bottom of the second shell portion is provided with a discharge port end cover detachably connected to the second shell portion; and / or the spindle rotor and the cleaning rotor are detachably mounted on the driving spindle and the driven shaft, respectively.

[0012] Preferably, the right end cover and / or the discharge port end cover of the second outer shell part are detachably connected to the second outer shell part via a quick-release clamp.

[0013] Preferably, the spindle rotor is a star-shaped structure connected by multiple concave arc structures, the cleaning rotor is arranged at the lower part of the spindle rotor, and the cleaning rotor has two symmetrical long arms, and the long arms of the cleaning rotor are tangent to the arc surface of the arc structure of the spindle rotor.

[0014] Preferably, the driving device is a reduction motor.

[0015] Preferably, the transmission mechanism is a gear transmission mechanism, and the gear transmission mechanism comprises a driving gear and a driven gear meshing with each other; the driving gear is mounted on the driving main shaft, and the driven gear is mounted on the driven shaft.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] (1) The connection (sealing part) between the driving main shaft and the driven shaft and the valve body included in the discharge valve of the present invention is provided with a suitable air sealing structure, and clean gas can be blown into the sealing cavity through the ventilation pipe to form an air seal, which can effectively prevent pollutants from entering the sealing cavity, and also prevent materials from entering the sealing cavity of the sealing part. In this way, the contact between the material and the sealing ring is better prevented, the dead angle is reduced, the possibility of contaminating the material during the discharge process is reduced, and the accumulation of materials in the sealing part is avoided, thereby eliminating the problem of clogging of the sealing part. The discharge valve of the present invention is particularly suitable for the discharge (dropping) of wet materials in the fields of medicine and food.

[0018] (2) In some preferred embodiments of the present invention, the driving device and the transmission mechanism are arranged on the same side of the unloading bin, so that the unloading valve described in the present invention has the advantages of compact structure, small layout space and convenient disassembly of the main shaft rotor and the cleaning rotor; the main shaft rotor and the cleaning rotor are detachably connected to the driving main shaft and the driven shaft respectively, and the right end cover and the discharge port end cover are detachably connected to the second outer shell part, which can realize the rapid disassembly of the main shaft rotor and the cleaning rotor, facilitate cleaning, and completely realize the cleaning of the internal cavity of the unloading bin without dead angles.

[0019] (3) The discharge valve in some preferred embodiments of the present invention has the advantages of self-cleaning, being able to achieve completely closed discharge, effectively avoiding contamination of materials during the discharge process, and having a compact structure, being easy to disassemble and clean, and being able to completely achieve the cleaning of the discharge bin without dead corners. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings of the present invention are provided for illustrative purposes only, and the proportions and quantities of the components in the drawings may not necessarily be consistent with the actual products.

[0021] Figure 1 It is a schematic cross-sectional structural diagram of a discharge valve in a specific embodiment of the present invention.

[0022] Figure 2 It is along Figure 1 A cross-sectional view taken along line AA is shown.

[0023] Figure 3 yes Figure 1 Enlarged view of part B.

[0024] In the figure: 1: driving device; 2: driving gear; 3: driven gear; 4: valve body; 4-1: first outer shell; 4-2: second outer shell; 5: first air-sealing structure; 5-1: first sealing ring; 5-2: second sealing ring; 5-3: first sealing cavity; 5-4: first ventilation duct; 6: sealing retaining ring; 7: feed inlet; 8: driving spindle; 9: quick-release clamp; 10: right end cover; 11: driven shaft; 12: spindle rotor; 13: cleaning rotor; 13-1: long arm; 14: discharge port; 15: left end cover; 16: second ventilation duct; 17: air-sealing joint. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The present invention provides a discharge valve. Figure 1 is a schematic cross-sectional structural diagram of a discharge valve in a specific embodiment of the present invention; Figure 2 It is along Figure 1 A cross-sectional view taken along line AA shown; Figure 3 yes Figure 1 The enlarged view of part B in FIG. Figure 3 The arrows in the diagram indicate the direction of air flow.

[0027] In the present invention, for example, Figure 1 As shown, the discharge valve includes a valve body 4 having a feed port 7 and a discharge port 14 arranged relatively, a spindle rotor 12 (feeding rotor) for discharging and a cleaning rotor 13 for cleaning the spindle rotor 12 arranged inside the valve body 4, a driving device 1 for driving the spindle rotor 12, a transmission mechanism and an air-sealing structure; the spindle rotor 12 is connected to the driving device 1 and the transmission mechanism through a driving spindle 8, the cleaning rotor 13 is connected to the transmission mechanism through a driven shaft 11, the cleaning rotor 13 and the spindle rotor 12 rotate synchronously through the transmission mechanism, the driving device 1 drives the spindle rotor 12 to rotate and causes the cleaning rotor 13 and the spindle rotor 12 to rotate synchronously through the transmission mechanism; the air-sealing structure includes a first air-sealing structure 5 arranged at the connection (sealing position) between the driving spindle 8 and the valve body 4 and a second air-sealing structure arranged at the connection between the driven shaft 11 and the valve body 4; for example, Figure 3 As shown, the first air-sealing structure 5 includes a first sealing ring 5-1 and a second sealing ring 5-2 which are sleeved on the driving main shaft 8, and a first sealing cavity 5-3 is formed between the first sealing ring 5-1 and the second sealing ring 5-2, and the second air-sealing structure includes a third sealing ring and a fourth sealing ring which are sleeved on the driven shaft 11, and a second sealing cavity is formed between the third sealing ring and the fourth sealing ring; a first ventilation duct 5-4 and a second ventilation duct 16 are provided on the valve body 4, and one end of the first ventilation duct 5-4 and the second ventilation duct 16 are respectively connected to the first sealing cavity 5-3 and the second sealing cavity, and the other end is used to connect to a gas source (for example, clean compressed gas).

[0028] In the present invention, the feed port 7 and the discharge port 14 are respectively arranged at the top and the bottom of the valve body 4; in the present invention, the first ventilation duct 5-4 and the second ventilation duct 16 are used for ventilation; in the present invention, the driving spindle 8, for example, can be a component included in the driving device, and the driven shaft 11, for example, can be a component included in the transmission mechanism; the present invention has no special restrictions on the structure of the spindle rotor 12 and the cleaning rotor 13, and their structures can be, for example, the structures adopted by the feeding rotor used for unloading and the cleaning rotor used for scraping in the existing unloading valve; in the present invention, the first air sealing structure and the second air sealing structure adopt the same structure.

[0029] It is particularly noted that the terms "first", "second", "third", "fourth", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; for ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances. In the present invention, for example, the first ventilation duct and the second ventilation duct can be collectively referred to as ventilation ducts, the first sealing ring, the second sealing ring, the third sealing ring and the fourth sealing ring can be collectively referred to as sealing rings, and the first sealing cavity and the second sealing cavity can be collectively referred to as sealing cavities.

[0030] When the discharge valve of the present invention is working, the driving device 1 drives the spindle rotor 12 to rotate through the driving spindle 8, and drives the cleaning rotor 13 to rotate through the transmission mechanism, and the cleaning rotor 13 and the spindle rotor 12 rotate synchronously through the transmission mechanism; in the present invention, after the material enters the space of the spindle rotor 12 from the feed port 7, as the driving spindle 8 rotates, when the spindle rotor 12 rotates to the position of the discharge port 14, the cleaning rotor 13 and the spindle rotor 12 are meshed with each other so that the material is scraped off by the cleaning rotor 13, so that the discharge valve of the present invention can self-clean the inside of the equipment during the material feeding and unloading process; in the present invention, a suitable air sealing structure is provided at the connection (sealing part) between the driving spindle 8 and the driven shaft 11 and the valve body 4. During the working process, clean gas can be blown into the sealed cavity through the provided ventilation pipe, and the gas reaches the sealed cavity (the cavity between the sealing ring and the driving spindle or the driven shaft) and blows to the left and right sides respectively (the air flow direction is as shown in FIG. Figure 3 The discharge valve of the present invention forms an airtight seal (as shown by the arrow), which can effectively prevent pollutants (pollutants on the outside of the discharge bin) from entering the sealed cavity, and also prevent materials from entering the sealed cavity at the seal, so as to better prevent materials from contacting with the sealing ring, reduce dead angles, reduce the possibility of polluting materials during the discharge process, and avoid the accumulation of materials at the seal, eliminating the problem of blockage at the seal. In this way, the discharge valve of the present invention solves the problem that the seals at both ends of the feeding rotor and the cleaning rotor in the existing discharge valve (star valve) cannot completely isolate the contact with the materials, and pollution may occur in the pharmaceutical industry and the food industry. The discharge valve of the present invention can realize completely closed discharge, effectively block pollutants from entering the sealed cavity and effectively prevent the contact between materials and the sealing ring, that is, effectively block the contact between materials and pollutants and the sealing ring, reduce the possibility of polluting materials during the discharge process, and is particularly suitable for wet material discharge (dropping) in the fields of medicine and food.

[0031] According to some preferred embodiments, both the first ventilation duct 5-4 and the second ventilation duct 16 are provided with an airtight joint 17, for example, Figure 1As shown; the first ventilation duct 5-4 and the second ventilation duct 16 are connected to the air source through the air-tight joint 17.

[0032] According to some preferred embodiments, the driving device 1 and the transmission mechanism are arranged in sequence on the same side of the main shaft rotor 12 and the cleaning rotor 13, so that the discharge valve described in the present invention can have a compact structure, reduce the layout space, and facilitate the disassembly of the main shaft rotor and the cleaning rotor.

[0033] According to some preferred embodiments, the valve body 4 is from left to right (such as Figure 1 As shown in the figure, from left to right, it comprises a first shell part 4-1 and a second shell part 4-2 in sequence, the transmission mechanism is arranged inside the first shell part 4-1, the spindle rotor 12 and the cleaning rotor 13 are arranged inside the second shell part 4-2, the first shell part 4-1 is connected to the left end of the second shell part 4-2, and the first shell part 4-1 and the second shell part 4-2 are separated by a left end cover 15 arranged at the left end of the second shell part 4-2; one end of the driving spindle 8 is installed with the spindle rotor 12, and the other end passes through the left end cover 15 of the second shell part 4-2 and is installed with the transmission mechanism and the driving device 1 in sequence; one end of the driven shaft 11 is installed with the cleaning rotor 13, and the other end passes through the left end cover 15 of the second shell part 4-2 and is installed with the transmission mechanism. In the present invention, when the valve body 4 includes the first shell portion 4-1 and the second shell portion 4-2, the first air-sealing structure 5 and the second air-sealing structure are respectively arranged at the connection between the driving main shaft 8, the driven shaft 11 and the left end cover 15, for example, Figure 1 shown.

[0034] In the present invention, the first shell part 4-1 is used to protect the transmission mechanism to ensure the safety of the discharge valve in the present invention when in use, and the second shell part 4-2 is used as a discharge bin for material discharge. In the present invention, the space in the discharge bin where the spindle rotor is arranged is also recorded as a feed bin, and the space in the discharge bin where the cleaning rotor is arranged is recorded as a cleaning bin, and the feed bin is connected to the cleaning bin; the present invention preferably arranges the drive device and the first shell part with the transmission mechanism built in on the same side of the second shell part, so that the discharge valve can be compact in structure, small in layout space, and easy to disassemble the spindle rotor and the cleaning rotor while ensuring the safety of the use of the discharge valve.

[0035] According to some preferred embodiments, the first ventilation duct 5-4 and the second ventilation duct 16 are opened in the left end cover 15 of the second shell part 4-2, for example, Figure 1As shown; the first sealing ring 5-1 and the third sealing ring are respectively arranged on the right side of the second sealing ring 5-2 and the fourth sealing ring, and the first sealing ring 5-1 and the third sealing ring are provided with a sealing retaining ring 6 on the circumference, for example, as Figure 3 In the present invention, the sealing ring 6 can be provided to position the first sealing ring 5-1 and the third sealing ring in the circumferential direction, thereby further ensuring the sealing effect.

[0036] According to some preferred embodiments, the feed port 7 and the discharge port 14 are respectively arranged at the top and bottom of the second shell part 4-2; and / or the driving spindle 8 and the driven shaft 11 are fixed to the first shell part 4-1 through bearings, which is beneficial to increase the stability of the installation of the driving spindle 8 and the driven shaft 11; for example, in the present invention, the driving spindle 8 and the driven shaft 11 are fixed to the first shell part 4-1 through a pair of bearings.

[0037] According to some preferred embodiments, the right end of the second shell part 4-2 is provided with a right end cover 10 detachably connected to the second shell part 4-2; the bottom of the second shell part 4-2 is provided with a discharge port end cover detachably connected to the second shell part 4-2; and / or the spindle rotor 12 and the cleaning rotor 13 are detachably mounted on the driving spindle 8 and the driven shaft 11, respectively. In the present invention, it is preferred that the driving device 1 and the transmission mechanism are arranged on the same side of the discharge bin, and it is preferred that the spindle rotor 12 and the cleaning rotor 13 are detachably connected to the driving spindle 8 and the driven shaft 11, respectively, and the right end cover 10 and the discharge port end cover are detachably connected to the second shell part 4-2. In this way, the spindle rotor and the cleaning rotor can be quickly disassembled, which is convenient for cleaning, and the internal cavity of the discharge bin can be completely cleaned without dead angles. In the present invention, the left end cover 15, the right end cover 10 and the discharge port end cover respectively refer to the positions located as follows: Figure 1 The shell end covers at the left end, right end and bottom of the second shell part 4-2.

[0038] According to some preferred embodiments, the right end cover 10 and / or the discharge port end cover of the second shell part 4-2 are detachably connected to the second shell part 4-2 via a quick-release clamp 9. In the present invention, it is preferred that the right end cover and / or the discharge port end cover are detachably connected to the second shell part using such a quick-release structure. When the discharge valve works to a predetermined time point, it is stopped, and the quick-release clamp at the right end and / or bottom of the second shell part is removed, so that the quick-release end cover (right end cover and / or discharge port end cover) of the second shell part can be removed. At the same time, since the drive device and the transmission mechanism are arranged on the same side of the discharge bin (second shell part), the spindle rotor and the cleaning rotor can be easily removed, so that the contact part of the discharge valve with the material can be thoroughly cleaned. This quick-release structure is particularly suitable for occasions such as food and pharmaceuticals that require frequent cleaning.

[0039] According to some preferred embodiments, the spindle rotor 12 and the cleaning rotor 13 are respectively sleeved on the driving spindle 8 and the driven shaft 11, and threaded holes for connecting screws are opened inside one end of the driving spindle 8 and the driven shaft 11, and gasket grooves for engaging gaskets are opened at the center positions of the spindle rotor 12 and the cleaning rotor 13, and the spindle rotor 12 and the cleaning rotor 13 are axially limited on the driving spindle 8 and the driven shaft 11 respectively by gaskets and screws; in the present invention, the gaskets are preferably step gaskets, and the spindle rotor 12 and the cleaning rotor 13 are limited and clamped by the steps on the gaskets to achieve the effect of axial limiting.

[0040] According to some preferred embodiments, the spindle rotor 12 is a star-shaped structure connected by a plurality of concave arc structures, the cleaning rotor 13 is arranged at the lower part of the spindle rotor 12, and the cleaning rotor 13 has two symmetrical long arms 13-1, and the long arms 13-1 of the cleaning rotor 13 are tangent to the arc surface of the arc structure of the spindle rotor 12, for example, Figure 2 In the present invention, the length of the long arm 13-1 is the same as the radius of the circle where the arc structure of the spindle rotor 12 is located, that is, the two adjacent arc structures on the spindle rotor 12 can correspond to the two long arms 13-1 respectively during the rotation process, so that each arc structure on the spindle rotor 12 can be completely cleaned after the spindle rotor 12 rotates a single circle, ensuring the continuous unloading of subsequent materials.

[0041] According to some preferred embodiments, two cleaning rotors 13 are relatively installed at one end of the driven shaft 11 located on the right side of the left end cover 15, and the long arm 13-1 of one cleaning rotor 13 is connected to the long arm 13-1 of the other cleaning rotor 13 by two scraping strips arranged in parallel and symmetrically.

[0042] According to some preferred embodiments, the diameter of the discharge port 14 is greater than the total length of the two long arms 13 - 1 of the cleaning rotor 13 , which can effectively ensure that the rotation of the cleaning rotor 13 is not hindered; in the present invention, the driven shaft 11 on which the cleaning rotor 13 is installed can, for example, be located on the center line of the discharge port 14 .

[0043] According to some preferred embodiments, the driving device 1 is a reduction motor, preferably a variable frequency motor reducer.

[0044] According to some preferred embodiments, the reduction motor further comprises a motor base with adjustable position.

[0045] According to some preferred embodiments, the transmission mechanism is a gear transmission mechanism, which includes a meshing driving gear 2 (driving meshing gear) and a driven gear 3 (driven meshing gear); the driving gear 2 is installed on the driving main shaft 8, and the driven gear 3 is installed on the driven shaft 11.

[0046] In some specific embodiments, the variable frequency motor reducer drives the spindle rotor 12 to rotate by driving the spindle 8, and the active meshing gear on the drive spindle 8 also rotates. A driven meshing gear and a cleaning rotor 13 are installed on the driven shaft 11. After the active meshing gear and the driven meshing gear are meshed, the rotation of the drive spindle 8 can drive the rotation of the cleaning rotor 13; the drive spindle 8 and the driven shaft 11 are fixed to the first housing portion 4-1 through bearings. After the material enters the semicircular space of the spindle rotor 12 from the feed port 7, as the drive spindle 8 rotates, when the spindle rotor 12 rotates When it moves to the position of the discharge port 14, the long arm 13-1 of the cleaning rotor 13 meshes with the main shaft rotor 12 through the gear of the gear transmission mechanism, so that the material is scraped off by the long arm 13-1 of the cleaning rotor 13; since a suitable air sealing structure is provided at the connection (sealing point) between the driving main shaft 8 and the driven shaft 11 and the valve body 4, during the working process, air is blown (inflated) into the sealing cavity through the ventilation pipe to form an air seal, which can effectively prevent pollutants on the bearing side from entering the sealing cavity, and also prevent materials from entering the sealing cavity, thereby avoiding contact between the material and the sealing ring and reducing the possibility of material contamination.

[0047] It is particularly noted that the terms "left", "right", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the parts or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the invention.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention 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 make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A discharge valve, characterized in that: It comprises a valve body with a feed inlet and a discharge outlet arranged opposite to each other, a spindle rotor for unloading and a cleaning rotor for cleaning the spindle rotor arranged inside the valve body, a driving device for driving the spindle rotor, a transmission mechanism and an air sealing structure; The main shaft rotor is connected to the driving device and the transmission mechanism through a driving main shaft, the cleaning rotor is connected to the transmission mechanism through a driven shaft, and the cleaning rotor and the main shaft rotor rotate synchronously through the transmission mechanism; the driving device and the transmission mechanism are arranged on the same side of the main shaft rotor and the cleaning rotor; The air sealing structure comprises a first air sealing structure provided at the connection between the driving main shaft and the valve body and a second air sealing structure provided at the connection between the driven shaft and the valve body; The first air-tight structure comprises a first sealing ring and a second sealing ring sleeved on the driving main shaft, a first sealing cavity is formed between the first sealing ring and the second sealing ring, and the second air-tight structure comprises a third sealing ring and a fourth sealing ring sleeved on the driven shaft, a second sealing cavity is formed between the third sealing ring and the fourth sealing ring; The valve body is provided with a first ventilation pipe and a second ventilation pipe, one end of the first ventilation pipe and the second ventilation pipe are respectively connected to the first sealed cavity and the second sealed cavity, and the other end is used to connect to the gas source, and the clean gas is blown into the sealed cavity through the ventilation pipe, and the gas is blown to the left and right sides to form an airtight seal after reaching the sealed cavity; The valve body includes a first shell part and a second shell part from left to right, the transmission mechanism is arranged inside the first shell part, the spindle rotor and the cleaning rotor are arranged inside the second shell part, the first shell part is connected to the left end of the second shell part, and the first shell part and the second shell part are separated by a left end cover arranged at the left end of the second shell part; The spindle rotor is mounted on one end of the driving spindle, and the transmission mechanism and the driving device are mounted in sequence on the other end through the left end cover of the second housing portion; The cleaning rotor is mounted on one end of the driven shaft, and the transmission mechanism is mounted on the other end through the left end cover of the second housing portion; The right end of the second shell part is provided with a right end cover detachably connected to the second shell part; the bottom of the second shell part is provided with a discharge port end cover detachably connected to the second shell part; the main shaft rotor and the cleaning rotor are respectively detachably mounted on the driving main shaft and the driven shaft.

2. The discharge valve according to claim 1, characterized in that: The first ventilation duct and the second ventilation duct are opened in the left end cover of the second shell part; The first sealing ring and the third sealing ring are respectively arranged on the right side of the second sealing ring and the fourth sealing ring, and sealing retaining rings are arranged on the circumference of the first sealing ring and the third sealing ring.

3. The discharge valve according to claim 1, characterized in that: The feed inlet and the discharge outlet are respectively arranged at the top and the bottom of the second shell part; and / or The driving main shaft and the driven shaft are both fixed on the first housing portion through bearings.

4. The discharge valve according to claim 1, characterized in that: The right end cover and / or the discharge port end cover of the second shell part are detachably connected to the second shell part via a quick-release clamp.

5. The discharge valve according to any one of claims 1 to 4, characterized in that: The spindle rotor is a star-shaped structure connected by a plurality of concave arc structures. The cleaning rotor is arranged at the lower part of the spindle rotor and has two symmetrical long arms. The long arms of the cleaning rotor are tangent to the arc surface of the arc structure of the spindle rotor.

6. The discharge valve according to any one of claims 1 to 4, characterized in that: The driving device is a reduction motor.

7. The discharge valve according to any one of claims 1 to 4, characterized in that: The transmission mechanism is a gear transmission mechanism, and the gear transmission mechanism includes a driving gear and a driven gear meshing with each other; The driving gear is mounted on the driving main shaft, and the driven gear is mounted on the driven shaft.

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