A double valve core unloading device

Abstract

The present invention discloses a dual-valve core unloading device, comprising a first valve core arranged in a first housing, a first impeller installed around the central spindle of the first valve core, a second valve core arranged in a second housing, and a second impeller installed around the central spindle of the second valve core; the first valve core is located above the second valve core; a cavity for forming a feed channel is arranged above the first valve core, and the feed channel is obliquely connected to the feed inlet; the first housing and the second housing are connected to each other, and another cavity for forming a feed channel is arranged at the connection; the lower part of the second valve core is connected to the discharge port through a discharge channel; the central spindles of the first valve core and the second valve core are connected to the driving motor in a transmission manner. The dual-valve core unloading device of the present invention is simple in design and easy to operate, and is simple and flexible to install and maintain, reduces the failure rate, improves the operating stability of the device, and can solve the problems of material jamming and shearing in the existing unloader.

Description

Technical Field

[0001] The invention belongs to the technical field of material conveying and relates to a double-valve core unloading device. Background Art

[0002] At present, the unloading devices are mostly star-shaped unloaders, heavy hammer unloaders, electric double-layer unloaders, pneumatic double-layer unloaders and other categories. The star-shaped unloader is composed of a rotor impeller with several blades, a housing, a reducer and a seal. The reducer motor drives the impeller to rotate through a coupling, and the material on the upper part of the housing is evenly brought to the lower part, and the material is sent away by the next device; it is suitable for dry powder and small granular materials, and has the characteristics of accurate material quantity control, but when large particles of hard objects fall into the tank, the valve core is often stuck and the dust collector cannot work normally. The heavy hammer unloader alternately opens and closes self-unloading under the action of gravity, and the heavy hammer automatically resets the device; it is generally suitable for dry, low-viscosity, and low-cohesive dust. When the dust properties do not meet the above requirements, it is easy to produce shed materials first, and then the instantaneous "pouring out" unloading phenomenon. In order to increase the air tightness of the ash unloading system, two unloaders of a certain type (such as a heavy hammer unloader) can be used in series, thus creating a double-layer unloader. In the prior art, the sealing valves of the double-layer unloader include cone valves and flat valves; however, the double-layer unloader also has problems such as material sticking and easy wear of the valve head.

[0003] Therefore, it is extremely necessary for technical personnel in this field to provide a double-valve core unloading device that is simple in design, easy to operate, simple and flexible to install and maintain, reduces the failure rate, improves the operating stability of the device, and can solve the problems of material jamming and shearing in existing unloaders. Summary of the invention

[0004] In view of the deficiencies in the above-mentioned prior art, the purpose of the present invention is to provide a double-valve core unloading device which is simple in design and easy to operate, simple and flexible in installation and maintenance, reduces the failure rate, improves the operating stability of the device, and can solve the problems of material jamming and shearing in the existing unloader.

[0005] The technical solution provided by the present invention is as follows:

[0006] A double valve core unloading device, comprising a first valve core arranged in a first housing, a first impeller installed around the central spindle of the first valve core, a second valve core arranged in a second housing, and a second impeller installed around the central spindle of the second valve core;

[0007] The radial dimension of the first impeller on the first valve core matches the radial dimension of the first housing; the radial dimension of the second impeller on the second valve core matches the radial dimension of the second housing; the first housing and the material bin surrounded by at least two adjacent blades on the first impeller form a sealed cavity, and the second housing and the material bin surrounded by at least two groups of adjacent blades on the second impeller that are centrally symmetrical form a sealed cavity;

[0008] The first valve core is located above the second valve core; a cavity for forming a feed channel is provided above the first valve core, and the feed channel is obliquely connected to the feed inlet;

[0009] The first housing and the second housing are connected to each other, and another cavity for forming a material introduction channel is provided at the connection;

[0010] The lower part of the second valve core is connected to the discharge port through a discharge channel;

[0011] The central main shafts of the first valve core and the second valve core are transmission-connected to the driving motor.

[0012] Preferably, the first housing and the second housing are connected via a connecting pipe; a material introduction channel is formed in the connecting pipe.

[0013] Furthermore, the connecting pipes of the first casing and the second casing are detachably connected by flanges.

[0014] Furthermore, a cleaning inspection port is provided on the side of the connecting pipe, and the cleaning inspection port is fixed to the connecting pipe by bolts.

[0015] Preferably, the central spindles of the first valve core and the second valve core are connected to the driving motor via a transmission sprocket or a pulley.

[0016] Furthermore, a first sprocket is arranged on the central main axis of the first valve core, and a second sprocket is arranged on the central main axis of the second valve core;

[0017] The drive motor and the first sprocket are driven by a first transmission chain, and the drive motor and the second sprocket are driven by a second transmission chain; or, the drive motor, the first sprocket, and the second sprocket are connected in sequence by a transmission chain.

[0018] Preferably, the feed channel is provided with a stepped surface on the upper side close to the first valve core, and the other side opposite to the feed channel is provided with an inclined surface;

[0019] A feed adjustment plate with adjustable overhang length is arranged on the step surface of the feed channel to adjust the feeding amount of the inlet solid material.

[0020] Furthermore, the feed adjustment plate adopts a folding plate, which includes a vertical section and a bending section. The vertical section is fixed on the vertical surface of the step surface, and the bending section of the folding plate is arranged toward the feed port side; the relative length of the folding plate and the step surface in the vertical direction is adjustable.

[0021] Furthermore, the included angle α between the vertical section and the bending section is controlled to be 135° to 150°.

[0022] Furthermore, the vertical distance between the top end of the first valve core and the step surface of the feed channel is 50-60 mm, and an inspection port is provided on the step surface just above the first valve core.

[0023] Furthermore, a vertical rubber plate is provided on the step surface at the rear end of the feed channel along the rotation direction of the impeller, and a gap of 3 to 5 mm is formed between the lower end of the rubber plate and the impeller.

[0024] Furthermore, a cleaning and emergency discharge port is provided on the inclined surface of the feed channel.

[0025] Furthermore, the rubber sheet has a thickness of 8 to 10 mm.

[0026] Preferably, a nitrogen purge pipe is provided at the upper right side of the second valve core.

[0027] Furthermore, the vertical distance between the center of the nitrogen purge pipe and the rotation path of the second impeller is 20 to 30 mm; the diameter of the nitrogen purge pipe is 25 mm to 30 mm.

[0028] Preferably, the radial dimension of the first impeller on the first valve core matches the radial dimension of the first housing; the radial dimension of the second impeller on the second valve core matches the radial dimension of the second housing; and / or,

[0029] Preferably, the horizontal center distance and vertical center distance between the feed port and the first valve core are both 1.1 to 1.2 times the diameter of the first impeller; the horizontal center distance and vertical center distance between the discharge port and the second valve core are 0.2 to 0.3 times the diameter of the second impeller, and the vertical center distance are 0.6 to 0.8 times the diameter of the second impeller.

[0030] Preferably, the rotation speed of the second valve core is controlled to be greater than the rotation speed of the first valve core, the number of blades of the first impeller is ≥6, and the rotation speed is ≥10r / min; the number of blades of the second impeller is ≥8, and the rotation speed is ≥15r / min.

[0031] Preferably, the curvature of the first casing is 1.25 to 1.35 times the curvature of the angle between two adjacent blades of the first impeller, and the curvature of the second casing is 2.2 to 2.5 times the curvature of the angle between two adjacent blades of the second impeller.

[0032] Preferably, the diameters of the first impeller and the second impeller are the same, both being D, where D≥250mm; the horizontal center distance between the first valve core and the second valve core is 0.5 to 0.6 times the diameter D, and the vertical center distance is 1.5 to 2 times the diameter D.

[0033] Preferably, the feed channel obliquely feeds and forms an angle of 45° with the horizontal plane of the feed inlet.

[0034] Compared with the double-layer discharger in the prior art, which usually adopts two identical dischargers simply stacked, the double valve core discharger of the present invention can bring the following beneficial effects:

[0035] 1) The double valve core unloader of the present invention has a cavity designed on the top of the first valve core, and another cavity is arranged between the first casing and the second casing. The first valve core and the second valve core arranged up and down are designed with different sealing cavities, which not only ensures the smooth and safe transportation of materials, but also has a simple and easy operation design, and is simple and flexible to install and maintain. At the same time, it can solve the problems of material jamming and shearing of the existing unloader, reduce the failure rate, and improve the operating stability of the device.

[0036] 2) The present invention controls the different numbers of impellers and the different curvatures of the casing, so that the sealing performance of the second valve core located at the lower side is higher than that of the first valve core located at the upper side, effectively ensuring the safety performance of the device while ensuring smooth unloading, and the operation is more reliable and stable. In addition, by controlling the speed of the second valve core to be greater than the speed of the first valve core, it can further ensure that the solid material is discharged smoothly from the unloading device.

[0037] 3) The unloading device of the present invention is provided with a plurality of inspection ports as a whole, and the bolt connection facilitates disassembly. When the unloader needs to be repaired and cleaned, the interior of the unloader can be repaired and cleaned by removing the observation port, without removing the connection between the main device and the external device. The recovery cycle is fast, which can improve the equipment operation efficiency.

[0038] 4) In the present invention, the feed channel is obliquely provided with cleaning and emergency discharge ports, which can be used for emergency discharge in the event of an accident in the device. For example, if the tower is overheated, the material in the device can be discharged in time to reduce the safety hazards of the device. At the same time, the damage to the unloading device itself caused by overheating can be avoided, thereby increasing the service life of the unloading device. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a structural schematic diagram of an embodiment of a double valve core unloading device of the present invention.

[0040] Figure 2 It is a schematic structural diagram of another embodiment of the double valve core unloading device of the present invention.

[0041] Figure 3 It is a structural schematic diagram of another embodiment of the double valve core unloading device of the present invention.

[0042] Figure 4 It is a structural schematic diagram of another embodiment of the double-valve core unloading device of the present invention.

[0043] The meanings of the symbols in the figure are:

[0044] 1-Feeding port;

[0045] 2-feeding channel, 20-step surface, 21-inclined surface, 22-feeding adjustment plate, 200-inspection port, 210-cleaning and emergency discharge port, 23-rubber plate;

[0046] 3-first housing, 30-first valve core, 31-first impeller, 32-first sprocket;

[0047] 4-feeding channel, 40-connecting pipe, 41-cleaning inspection port, 42-flange;

[0048] 5-second housing, 50-second valve core, 51-second impeller, 52-second sprocket;

[0049] 6-discharging channel; 7-discharging port;

[0050] 8-driving motor, 80-transmission chain, 81-first transmission chain, 82-second transmission chain. DETAILED DESCRIPTION

[0051] The following will be combined with specific embodiments to clearly and completely describe the technical solutions in the present invention. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention, and cannot be used to limit the protection scope of the present invention.

[0052] In order to simplify the drawings, each figure only schematically shows the parts related to the present invention, which do not represent the actual structure of the product.

[0053] According to an embodiment provided by the present invention, Figure 1 As shown, a double valve core unloading device includes a first valve core 30 disposed in a first housing 3, a first impeller 31 installed around the central axis of the first valve core 30, a second valve core 50 disposed in a second housing 5, and a second impeller 51 installed around the central axis of the second valve core 50;

[0054] The radial dimension of the first impeller 31 on the first valve core 30 matches the radial dimension of the first housing 3; the radial dimension of the second impeller 51 on the second valve core 50 matches the radial dimension of the second housing 5; the first housing 3 and at least two adjacent blades on the first impeller 31 form a sealed cavity A, and the second housing 5 and at least two groups of adjacent blades on the second impeller 51 that are centrally symmetrical form a sealed cavity B.

[0055] The first valve core 30 is located above the second valve core 50; a cavity for forming a feed channel 2 is provided above the first valve core 30, and the feed channel 2 is obliquely connected to the feed inlet 1;

[0056] The first housing 3 and the second housing 5 are connected to each other, and another cavity for forming the material introduction channel 4 is provided at the connection;

[0057] The lower part of the second valve core 50 is connected to the discharge port 7 through the discharge channel 6;

[0058] The central spindles of the first valve core 30 and the second valve core 50 are transmission-connected to the driving motor 8 .

[0059] The double valve core unloading device provided in this embodiment, on the one hand, feeds the material obliquely downward through the feed port and the feed channel 2, and the material enters the first impeller 31 arranged on the first valve core 30, and then rotates with the first impeller 31, thereby driving the material to enter the feed guide channel 4 from between adjacent blades, and then the material enters the second impeller 51 arranged on the second valve core 50, and the rotation of the second impeller 51 drives the material into the discharge channel 6. The design of the cavity above the first valve core 30 and the design of the cavity between the second housing 5 and the first housing 3 allow for a larger space above the material and in the circulation area; on the other hand, the first impeller 31 is adapted in size in the first housing 3, and the second impeller 51 is adapted in size in the second housing 5, so that the material flows through the feed channel 2, the first impeller 31 on the first valve core 30, into the feed channel 4, and then into the discharge channel 6 through the second impeller 51 on the second valve core 50, so that the unloading process is steady and orderly, and material blockage is not likely to occur; the first housing 3 and at least two adjacent blades on the first impeller 31 surround the The material bin forms a sealed chamber A, and the material bin formed by at least two groups of adjacent blades that are centrally symmetrical on the second housing 5 and the second impeller 51 forms a sealed chamber B; during the continuous rotation of the first impeller 31 and the second impeller 52, the material is continuously driven downward by the sealed chamber formed by the two blades, and the sealing performance of the second valve core 50 located on the lower side is higher than that of the first valve core 30 located on the upper side by performing different sealing designs on the first valve core 30 and the second valve core 50 arranged up and down; the leakage of gas in the device is effectively prevented, and the safety of the use of the present invention is improved. Therefore, this embodiment can ensure smooth material transportation, provide sufficient unloading space for materials, increase material processing capacity, and form a suitable flow unloading stroke. The design is simple and easy to operate, and the installation and maintenance are simple and flexible. At the same time, it is safe and reliable, and can solve the problems of material jamming and shearing in the existing unloader, and the unloading is smooth, the failure rate is reduced, and the operation stability of the device is improved.

[0060] Another embodiment provided according to the present invention is a double valve core unloading device, and the difference between this embodiment and the first embodiment is that the first housing 3 and the second housing 5 are connected by a connecting pipe 40; and a material guide channel 4 is formed in the connecting pipe 40.

[0061] Preferably, the connecting pipe 40 of the first housing 3 and the second housing 5 is detachably connected by a flange. Preferably, a cleaning inspection port 41 is provided on the side of the connecting pipe 40, and the cleaning inspection port 41 is fixed to the connecting pipe 40 by bolts.

[0062] In this embodiment, the connecting pipe 40 of the first housing 3 and the second housing 5 is connected by a flange 42, which is convenient for disassembly. Among them, the first valve core 30 can be used alone as a single valve core unloader, making the installation and maintenance of the on-site unloading device simpler and more flexible.

[0063] Another embodiment provided according to the present invention is a dual valve core unloading device, and the difference between this embodiment and the first embodiment is that the central spindle of the first valve core 30 and the second valve core 50 is connected to the driving motor 8 through a transmission sprocket or a pulley.

[0064] In practical applications, such as Figure 1 , 2 As shown, a first sprocket 32 ​​is arranged on the central spindle of the first valve core 30, and a second sprocket 52 is arranged on the central spindle of the second valve core 50; the drive motor 8 and the first sprocket 32 ​​are driven by a first transmission chain 81, and the drive motor 8 and the second sprocket 52 are driven by a second transmission chain 82; wherein the drive motor 8 can be arranged on the left side or the right side of the first valve core and the second valve core. Alternatively, a more concise structural arrangement is as follows: Figure 3 , 4 As shown, the drive motor 8, the first sprocket 32, and the second sprocket 52 are connected in sequence through a transmission chain 80; wherein the drive motor 8 can be arranged on the left side or the right side of the first valve core and the second valve core.

[0065] According to another embodiment provided by the present invention, a dual valve core unloading device is provided. The difference between this embodiment and the first embodiment is that the feed channel 2 is provided with a step surface 20 above the side close to the first valve core 30, and the other side opposite to the feed channel 2 is provided with an inclined surface 21;

[0066] A feed adjustment plate 22 with an adjustable overhang length is provided on the step surface 20 of the feed channel 2 to adjust the feeding amount of the inlet solid material.

[0067] The present embodiment provides a specific setting form of the feed channel 2, and adjusts the discharge amount of solid material from the feed port by adjusting the length of the feed adjustment plate 22 on the step surface 20 on one side, ensuring that the height of the material entering between any two impellers of the first valve core 30 does not exceed 2 / 3 of the material level, especially ensuring that the height of the material between the two impellers directly above the first valve core 20 does not exceed 2 / 3 of the vertical height of the trapezoidal silo formed by the two impellers, thereby achieving smooth transfer of materials and avoiding the problems of shearing and jamming of solid materials.

[0068] More preferably, the feed adjustment plate 22 adopts a folding plate, which includes a vertical section and a bending section. The vertical section is fixed on the vertical surface of the step surface, and the bending section of the folding plate is arranged toward the side of the feed port 1; the relative length of the folding plate and the step surface in the vertical direction is adjustable.

[0069] In this embodiment, the folding plate is fixed to the step surface by bolts, wherein the bending section facing the feeding port provides a buffering effect on the material; by different bolt fixing positions, the overhang length of the folding plate relative to the step surface can be adjusted, and different degrees of buffering effect can be provided according to the material feeding speed matching. In addition, the angle α between the vertical section and the bending section is controlled to be 135° to 150°; the material can fall evenly in the feeding channel without causing instant congestion and jamming.

[0070] As another more preferred embodiment, the vertical distance between the top of the first valve core 30 and the step surface 20 is 50-60 mm, and an inspection port 200 is provided on the step surface 20 just above the first valve core 30; the inspection port 200 is connected to the step surface 20 by bolts.

[0071] Preferably, a rubber sheet 23 is provided on the step surface at the rear end of the feed channel 2 along the impeller rotation direction. In practical applications, the thickness of the rubber sheet 23 is 8-10 mm, and there is a gap of 3-5 mm between the lower end of the rubber sheet 23 and the first impeller 31 .

[0072] In this embodiment, the rubber plate 23 can intercept debris such as welding rods entering vertically or pour them into the material between the two impellers after interception; and a visual inspection port is provided on the top of the first valve core 30, so that the feed adjustment plate 22 can be adjusted in time to ensure smooth flow of materials.

[0073] As another preferred embodiment, a cleaning and emergency discharge port 210 is provided on the inclined surface 21 of the feed channel 2 .

[0074] The provision of the cleaning and emergency discharge port 210 in this embodiment can realize emergency discharge in accident conditions, such as over-temperature in the tower, and timely discharge the materials in the device to reduce the safety hazards of the device. At the same time, it can avoid damage to the unloader itself due to over-temperature use and increase the service life of the unloader.

[0075] Another embodiment provided by the present invention is a double valve core unloading device. The difference between this embodiment and the first embodiment is that a nitrogen purge pipe 53 is provided at the upper right of the second valve core 50. The vertical distance between the center of the nitrogen purge pipe 53 and the rotation path of the second impeller is 20 to 30 mm. In practical applications, the diameter of the nitrogen purge pipe is 25 mm to 30 mm.

[0076] The arrangement of the nitrogen purge pipe in this embodiment can not only achieve air sealing but also play a certain interception role on the material, reduce the possibility of material jamming and shearing in the casing, and achieve smooth material output. Generally, the valve core rotates clockwise, and the nitrogen purge pipe 53 is arranged on the upper right of the second valve core 50 to make the material blocking effect more obvious.

[0077] According to another embodiment provided by the present invention, there is a double valve core unloading device. The difference between this embodiment and the first embodiment is that the horizontal center distance and vertical center distance between the feed inlet and the first valve core are both 1.1 to 1.2 times the diameter of the first impeller; the horizontal center distance between the discharge port and the second valve core is 0.2 to 0.3 times the diameter of the second impeller, and the vertical center distance is 0.6 to 0.8 times the diameter of the second impeller. In this embodiment, the staggered setting of the feed inlet and the discharge port can ensure the stability of feeding and discharging.

[0078] Another embodiment provided by the present invention is a double valve core unloading device. The difference between this embodiment and the first embodiment is that the number of blades of the first impeller 31 is ≥6, and the rotation speed is ≥10r / min; the number of blades of the second impeller 51 is ≥8, and the rotation speed is ≥15r / min. The rotation speed of the second valve core 50 is controlled to be greater than the rotation speed of the first valve core 30. Through the different designs of the upper and lower valve core rotation speeds, it can further ensure that the solid material is discharged smoothly from the unloading device. More preferably, the curvature of the first housing 3 is 1.25 to 1.35 times the curvature of the angle between two adjacent blades of the first impeller 31, and the curvature of the second housing 5 is 2.2 to 2.5 times the curvature of the angle between two adjacent blades of the second impeller 51. In this embodiment, by designing the number of impeller blades and the curvature of the casing on the first valve core and the second valve core differently, it is ensured that the material bin surrounded by at least two adjacent blades on the first casing 3 and the first impeller 31 forms a sealed chamber A, and the material bin surrounded by at least two groups of centrally symmetrical adjacent blades on the second casing 5 and the second impeller 51 forms a sealed chamber B, so that the sealing performance of the second valve core located on the lower side is higher than that of the first valve core located on the upper side. While ensuring smooth unloading, it effectively prevents leakage of gas in the device and improves the safety of the device; when the double-valve core unloading device of the present invention is When installed above an engineering device such as a flue gas purification device or a regeneration device (the flue gas contains pollutants such as sulfur dioxide, leakage of which is harmful to the human body, and air entering the flue gas purification device will increase the processing load of the device; the regeneration gas component of the regeneration device is rich in high-concentration sulfur dioxide, which is also harmful. At the same time, the high temperature of the regeneration device has high requirements for oxygen content, and air entering the device is prone to cause accidents such as tower burning), it is ensured that the flue gas does not leak out, and the safety of personnel is ensured. When the double-valve core unloading device of the present invention is located below the engineering device, it is ensured that air does not enter the engineering device, and the safety of the engineering device is ensured.

[0079] Another embodiment provided by the present invention is a double valve core unloading device, and the difference between this embodiment and the first embodiment is that the diameters of the first impeller and the second impeller are the same, both D, D ≥ 250 mm; the horizontal center distance between the first valve core and the second valve core is 0.5 to 0.6 times the diameter D, and the vertical center distance is 1.5 to 2 times the diameter D. In this embodiment, the first valve core 30 and the second valve core 50 are controlled to maintain a certain distance in the horizontal direction to facilitate further unloading.

[0080] In the above embodiment, the feed channel obliquely feeds and forms an angle of 45° with the horizontal plane of the feed inlet.

[0081] It should be noted that the above embodiments can be freely combined as needed. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. A double valve core unloading device, characterized in that: It includes a first valve core arranged in a first housing, a first impeller installed around the central axis of the first valve core, a second valve core arranged in a second housing, and a second impeller installed around the central axis of the second valve core; The radial size of the first impeller on the first valve core matches the radial size of the first housing; the radial size of the second impeller on the second valve core matches the radial size of the second housing; The first housing and the material bin surrounded by at least two adjacent blades on the first impeller form a sealed chamber A, and the second housing and the material bin surrounded by at least two groups of adjacent blades on the second impeller that are centrally symmetrical form a sealed chamber B; the number of blades of the second impeller is greater than the number of blades of the first impeller, and the rotation speed of the second valve core is greater than the rotation speed of the first valve core; The first valve core is located above the second valve core; a cavity for forming a feed channel is provided above the first valve core, and the feed channel is obliquely connected to the feed inlet; The first housing and the second housing are connected to each other, and another cavity for forming a material introduction channel is provided at the connection; the lower part of the second valve core is connected to the material outlet through the material outlet channel; The central main shafts of the first valve core and the second valve core are transmission-connected to the driving motor.

2. The double valve core unloading device according to claim 1 is characterized in that: The first housing and the second housing are connected via a connecting pipe; a material introduction channel is formed in the connecting pipe.

3. The double valve core unloading device according to claim 2 is characterized in that: The connecting pipes of the first housing and the second housing are detachably connected by flanges; and / or, A cleaning inspection port is arranged on the side of the connecting pipe, and the cleaning inspection port is fixed to the connecting pipe by bolts.

4. The double valve core unloading device according to claim 1, characterized in that: The central spindles of the first valve core and the second valve core are connected to the driving motor via a transmission sprocket or a pulley.

5. The double valve core unloading device according to claim 4, characterized in that: A first sprocket is arranged on the central main shaft of the first valve core, and a second sprocket is arranged on the central main shaft of the second valve core; The drive motor and the first sprocket are driven by a first transmission chain, and the drive motor and the second sprocket are driven by a second transmission chain; or, the drive motor, the first sprocket, and the second sprocket are connected in sequence by a transmission chain.

6. The double valve core unloading device according to claim 1, characterized in that: The feed channel is provided with a stepped surface on the upper side close to the first valve core, and the other side opposite to the feed channel is provided with an inclined surface; A feed adjustment plate with adjustable overhang length is arranged on the step surface of the feed channel to adjust the feeding amount of the inlet solid material.

7. The double valve core unloading device according to claim 6, characterized in that: The feed adjustment plate adopts a folding plate, which includes a vertical section and a bending section. The vertical section is fixed on the vertical surface of the step surface, and the bending section of the folding plate is arranged toward the feed inlet. The relative length between the folding plate and the step surface in the vertical direction is adjustable.

8. The double valve core unloading device according to claim 6, characterized in that: The vertical distance between the top of the first valve core and the step surface of the feed channel is 50-60 mm, and an inspection port is provided on the step surface just above the first valve core; and / or, A vertical rubber sheet is provided on the step surface at the rear end of the feed channel along the rotation direction of the impeller, and a gap of 3-5 mm is provided between the lower end of the rubber sheet and the impeller; and / or, A cleaning and emergency discharge port is arranged on the inclined surface of the feed channel.

9. The double valve core unloading device according to claim 1, characterized in that: The curvature of the first casing is 1.25 to 1.35 times the curvature of the angle between two adjacent blades of the first impeller, and the curvature of the second casing is 2.2 to 2.5 times the curvature of the angle between two adjacent blades of the second impeller.

10. The double valve core unloading device according to claim 1, characterized in that: The horizontal center distance and vertical center distance between the feed inlet and the first valve core are both 1.1 to 1.2 times the diameter of the first impeller; the horizontal center distance and vertical center distance between the discharge port and the second valve core are 0.2 to 0.3 times the diameter of the second impeller, and 0.6 to 0.8 times the diameter of the second impeller; and / or, The first impeller and the second impeller have the same diameter, both of which are D, D ≥ 250 mm; the horizontal center distance between the first valve core and the second valve core is 0.5 to 0.6 times the diameter D, and the vertical center distance is 1.5 to 2 times the diameter D; and / or, The feed channel forms an angle of 45° with the horizontal plane of the feed inlet; and / or, A nitrogen purge pipe is provided at the upper right side of the second valve core.

Images