A uniformly mixed negative pressure material conveying device

Abstract

This invention discloses a negative pressure material conveying device for uniform mixing, comprising a hopper, a conveying pipe, a mixing chamber, a synchronous feeding control mechanism, and a negative pressure mechanism. The conveying pipe includes two inlet pipes and one outlet pipe. The synchronous feeding control mechanism includes a sealing rod, a switch transmission assembly, and a switch drive motor, with the switch drive motor fixedly mounted on the outside of the mixing chamber. The switch transmission assembly includes a switch transmission gear and a switch transmission rack. Two switch transmission racks and two sealing rods are provided, with each rack connected to a sealing rod, and the racks are horizontally opposite each other. The sealing rod is laterally movable within the mixing chamber, with one end of the rod having an inclined structure and extending to the outlet of the mixing chamber where the inlet pipe connects. This negative pressure material conveying device can not only mix two materials more uniformly and in any proportion, but also has high conveying efficiency.

Description

Technical Field

[0001] This invention relates to material conveying devices, and more specifically to a negative pressure material conveying device for uniform mixing. Background Technology

[0002] In industrial production, material mixing and conveying devices are key equipment for achieving uniform mixing and continuous transport of various materials, and their technology is relatively mature. Existing technologies commonly include screw conveyor mixing equipment, pneumatic conveying systems, and mechanical stirring conveying devices. Among these, pneumatic conveying systems utilize airflow energy to suspend and transport materials within closed pipes, making them suitable for long-distance, high-cleanliness applications.

[0003] For example, an existing pneumatic conveying system includes a negative pressure mechanism, two feed pipes, a mixing chamber, and a discharge pipe. The two feed pipes are connected to the side wall or top of the mixing chamber, respectively, and both feed pipes have solenoid valves at their outlets. The discharge pipe is connected to the bottom of the mixing chamber. The negative pressure mechanism is connected to the discharge pipe. Under the negative pressure provided by the negative pressure mechanism, the two feed pipes can sequentially convey two different materials into the mixing chamber, and then convey them to the next processing device through the discharge pipe. However, the two feed pipes cannot perform feeding operations; they can only convey different materials into the mixing chamber sequentially. This not only consumes a lot of time, but more importantly, the different materials falling into the mixing chamber sequentially will form layers from bottom to top, resulting in uneven mixing, which needs improvement. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned problems and provide a negative pressure material conveying device for uniform mixing. This negative pressure material conveying device can not only mix two materials more evenly and in any proportion, but also has a high conveying efficiency.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A uniformly mixed negative pressure material conveying device includes a hopper, a conveying pipe, a mixing chamber, a synchronous feeding control mechanism, and a negative pressure mechanism.

[0007] The material hopper is provided in two parts, and the conveying pipe includes two inlet pipes and one outlet pipe. The inlet pipes are connected between the mixing chamber and the material hopper, and the outlet pipe is connected to the mixing chamber. The negative pressure mechanism is connected to the outlet pipe.

[0008] The synchronous feeding control mechanism includes a blocking rod, a switch transmission assembly, and a switch drive motor. The switch drive motor is fixedly installed on the outside of the mixing chamber. The switch transmission assembly includes a switch transmission gear and a switch transmission rack. There are two switch transmission racks and two blocking rods. The two switch transmission racks are respectively connected to the two blocking rods and are arranged horizontally opposite each other. The blocking rod is laterally movable in the mixing chamber. One end of the blocking rod is inclined and extends to the feed pipe, which is connected to the outlet of the mixing chamber.

[0009] The working principle of the above-mentioned uniformly mixed negative pressure material conveying device is as follows:

[0010] During operation, based on the mixing ratio of the two materials, a switch-driven motor drives a switch transmission gear to rotate. This gear, in turn, drives two switch transmission racks to move in opposite directions, causing the two blocking rods to move closer to and further away from the outlets of their respective feed pipes. This reduces or increases the actual flow rate at the outlets of the two feed pipes until the actual flow rate at the outlets of the two feed pipes equals the mixing ratio of the two materials. Furthermore, by setting one end of the blocking rod to an inclined structure and adding two blocking rods that can move in opposite directions, the outlet sizes of the two feed pipes are adjusted in real time, ensuring that the total flow rate remains constant. This allows for dynamic adjustment of the flow rate ratio between the two feed pipes, thus achieving any desired feeding ratio.

[0011] Under the negative pressure of the negative pressure mechanism, the two feed pipes simultaneously transport the materials from the two hoppers to the mixing chamber. The two materials are mixed in real time in proportion, so that there will be no layering and accumulation, and the mixing is more uniform. The mixed material is transported to the next processing device through the discharge pipe.

[0012] In a preferred embodiment of the present invention, the synchronous feeding control mechanism further includes a clutch drive cylinder for driving the switch drive rack closer to or away from the switch drive gear. Two clutch drive cylinders are provided and fixedly mounted on two sealing rods respectively. The extension rods of the two clutch drive cylinders are respectively connected to the two switch drive racks; the switch drive racks are longitudinally movable and connected to the sealing rods. With this structure, the clutch drive cylinders can independently drive the switch drive racks closer to or away from the switch drive gear, switching between independent feeding mode and synchronous feeding mode. The flow rate of one of the feed pipes can be adjusted unilaterally, offering greater flexibility and suitability for different applications.

[0013] Furthermore, the other end of the sealing rod is laterally movable and disposed inside the installation tube of the mixing chamber. The other end of the sealing rod is provided with a self-locking installation hole, which connects the inner cavity of the sealing rod and the inner wall of the installation tube.

[0014] The synchronous feeding control mechanism also includes a self-locking structure for locking the sealing rod. This self-locking structure has two sets, each including a self-locking top pin, a swing rod, and a longitudinal connecting rod. The swing rod is hinged within the inner cavity of the sealing rod. With the hinge center of the swing rod as the boundary, both ends of the swing rod are connected to the self-locking top pin and the longitudinal connecting rod respectively through elongated holes. The self-locking top pin is longitudinally movable and positioned within the self-locking mounting hole of the sealing rod. The longitudinal connecting rod is fixedly connected to the switch transmission rack. When the switch transmission rack meshes with the switch transmission gear, the corresponding self-locking top pin moves away from the inner wall of the mounting tube.

[0015] With the above structure, when it is necessary to adjust the flow rate of the feed pipe by pushing the sealing rod, the clutch-driven cylinder drives the corresponding switch transmission rack to approach the switch transmission gear. At the same time, the longitudinal connecting rod moves longitudinally with the switch transmission rack, and the swing rod drives the self-locking top pin away from the inner wall of the mounting pipe to complete the unlocking action, thus enabling the flow rate adjustment operation. After the opening is adjusted, the clutch-driven cylinder drives the corresponding switch transmission rack away from the switch transmission gear. At the same time, the longitudinal connecting rod and the swing rod drive the self-locking top pin to approach and press against the inner wall of the mounting pipe, locking the sealing rod and preventing it from loosening, which would affect the accurate feeding operation. This is quite ingenious. On the other hand, when it is necessary to convey one type of material, the feed pipe corresponding to the other material is first blocked. Then, the self-locking top pin presses the corresponding sealing rod against the inner wall of the mounting pipe, thereby locking the sealing rod corresponding to the other material and completely blocking the conveying of that material. In this way, not only can only one type of material be conveyed, but the flow rate of that material can also be adjusted arbitrarily, which is very flexible.

[0016] Furthermore, a longitudinal guide structure is provided between the switch drive rack and the sealing rod. The longitudinal guide structure includes guide posts and guide holes. There are two guide posts, both of which are fixedly connected to the switch drive rack. There are two guide holes, which are opened on the sealing rod.

[0017] Furthermore, one of the guide posts is formed by the longitudinal connecting rod.

[0018] In a preferred embodiment of the present invention, one end of the sealing rod has a downward-facing inclined surface, and limiting wings are provided on both sides of the inclined surface to guide the material downward.

[0019] In a preferred embodiment of the present invention, the mixing chamber is provided with a discharge screen, which is located below the outlet of the feed pipe to disperse the incoming material for uniform mixing.

[0020] Furthermore, the material feeding screen is equipped with stirring blades for stirring the falling material, further improving the uniformity of mixing.

[0021] In a preferred embodiment of the present invention, the lower end of the mixing cavity is configured as a funnel structure.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] 1. The negative pressure material conveying device of the present invention can control the ratio of the actual flow rate of the outlet of the two feed pipes by setting two blocking rods that can move in opposite directions. This allows the two feed pipes to be opened at the same time, conveying two kinds of materials simultaneously. This not only improves the conveying efficiency, but also allows the two materials to be mixed in real time according to the ratio, so that there will be no layering and accumulation, and the mixing is more uniform.

[0024] 2. By setting one end of the sealing rod to an inclined structure and adding two sealing rods that can move in opposite directions, one in and one out, the outlet size of the two feed pipes can be adjusted in real time. This not only ensures that the total flow rate remains constant, but also allows for dynamic adjustment of the flow rate ratio of the two feed pipes, thereby obtaining any feeding ratio. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the uniformly mixed negative pressure material conveying device of the present invention.

[0026] Figure 2 This is a three-dimensional structural diagram of the feed pipe and synchronous feeding control mechanism of the present invention.

[0027] Figure 3 This is a cross-sectional view of the feed pipe and synchronous feeding control mechanism of the present invention.

[0028] Figure 4 This is a three-dimensional structural diagram of the sealing rod of the present invention. Detailed Implementation

[0029] To enable those skilled in the art to fully understand the technical solutions of the present invention, the present invention will be further described below in conjunction with embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0030] Combination Figure 1 The uniform mixing negative pressure material conveying device of this embodiment includes a hopper 1, a conveying pipe, a mixing chamber 2, a synchronous feeding control mechanism, and a negative pressure mechanism; there are two hoppers 1, the conveying pipe includes two inlet pipes 3 and one outlet pipe 4, the inlet pipes 3 are connected between the mixing chamber 2 and the hopper 1, the outlet pipe 4 is connected to the mixing chamber 2, and the negative pressure mechanism is connected to the outlet pipe 4;

[0031] Combination Figures 1-3The synchronous feeding control mechanism includes a blocking rod 5, a switch transmission assembly, and a switch drive motor 6. The switch drive motor 6 is fixedly installed on the outside of the mixing chamber 2. The switch transmission assembly includes a switch transmission gear 7 and a switch transmission rack 8. There are two switch transmission racks 8 and two blocking rods 5. The two switch transmission racks 8 are respectively connected to the two blocking rods 5 and are arranged horizontally opposite each other. The blocking rod 5 is laterally movable inside the mixing chamber 2. One end of the blocking rod 5 is inclined and extends to the feed pipe 3, which is connected to the outlet of the mixing chamber 2.

[0032] Combination Figure 4 The inclined structure at one end of the sealing rod 5 is a downward inclined surface 9, and limiting wings 10 are provided on both sides of the inclined surface 9 to guide the material downward.

[0033] Combination Figures 1-3 The synchronous feeding control mechanism also includes clutch drive cylinders 11 for driving the switch drive rack 8 to move closer to or away from the switch drive gear 7. Two clutch drive cylinders 11 are provided and fixedly mounted on two sealing rods 5 respectively. The extension rods of the two clutch drive cylinders 11 are respectively connected to the two switch drive racks 8. The switch drive rack 8 is longitudinally movable and connected to the sealing rods 5. With this structure, the clutch drive cylinders 11 can independently drive the switch drive rack 8 to move closer to or away from the switch drive gear 7, switching between independent feeding mode and synchronous feeding mode. The flow rate of one of the feed pipes 3 can be adjusted unilaterally, offering greater flexibility and suitability for different applications.

[0034] Combination Figures 1-3 The other end of the sealing rod 5 is laterally movable and is disposed in the mounting tube 12 of the mixing chamber 2. The other end of the sealing rod 5 is provided with a self-locking mounting hole 5-1, which is connected between the inner cavity of the sealing rod 5 and the inner wall of the mounting tube 12.

[0035] The synchronous feeding control mechanism also includes a self-locking structure for locking the sealing rod 5. The self-locking structure has two sets, each set including a self-locking top pin 13, a swing rod 14, and a longitudinal connecting rod 15. The swing rod 14 is hinged in the inner cavity of the sealing rod 5. With the hinge center of the swing rod 14 as the boundary, the two ends of the swing rod 14 are respectively connected to the self-locking top pin 13 and the longitudinal connecting rod 15 through elongated holes. The self-locking top pin 13 is longitudinally movable in the self-locking mounting hole 5-1 of the sealing rod 5. The longitudinal connecting rod 15 is fixedly connected to the switch transmission rack 8. When the switch transmission rack 8 meshes with the switch transmission gear 7, the corresponding self-locking top pin 13 moves away from the inner wall of the mounting tube 12.

[0036] With the above structure, when it is necessary to adjust the flow rate of the feed pipe 3 by pushing the sealing rod 5, the clutch drive cylinder 11 drives the corresponding switch transmission rack 8 to approach the switch transmission gear 7. At the same time, the longitudinal connecting rod 15 moves longitudinally with the switch transmission rack 8, and the swing rod 14 drives the self-locking top pin 13 away from the inner wall of the mounting pipe 12 to complete the unlocking action, and then the flow rate adjustment operation can be performed. After the opening adjustment is completed, the clutch drive cylinder 11 drives the corresponding switch transmission rack 8 away from the switch transmission gear 7. At the same time, the longitudinal connecting rod 15 and the swing rod 14 drive the self-locking top pin 13 to approach and press against the inner wall of the mounting pipe 12 to lock the sealing rod 5, preventing the sealing rod 5 from loosening and affecting the accurate feeding operation. It is very ingenious. On the other hand, when it is necessary to transport one type of material, the feed pipe corresponding to the other material is first blocked, and then the corresponding sealing rod is pushed against the inner wall of the installation pipe by the self-locking top pin, thereby locking the sealing rod corresponding to the other material and completely blocking the transport of that material; in this way, not only can only one type of material be transported, but the flow rate of that material can also be adjusted arbitrarily, which is very flexible.

[0037] Furthermore, a longitudinal guide structure is provided between the switch drive rack 8 and the sealing rod 5. The longitudinal guide structure includes guide posts and guide holes. There are two guide posts, both of which are fixedly connected to the switch drive rack 8. There are two guide holes, which are opened on the sealing rod 5.

[0038] Furthermore, one of the guide posts is formed by the longitudinal link 15.

[0039] Combination Figure 2 The mixing chamber 2 is equipped with a material discharge screen 16, which is located below the outlet of the feed pipe 3 to disperse the incoming material so as to mix it evenly.

[0040] Combination Figure 2 The material feeding screen 16 is provided with stirring blades 17 for stirring the falling material, which further improves the uniformity of mixing.

[0041] Combination Figure 1 The lower end of the mixing chamber 2 is configured as a funnel structure.

[0042] Combination Figures 1-3 The working principle of the above-mentioned uniformly mixed negative pressure material conveying device is as follows:

[0043] During operation, based on the mixing ratio of the two materials, the switch-driven motor 6 drives the switch transmission gear 7 to rotate. The switch transmission gear 7 then drives two switch transmission racks 8 to move in opposite directions, causing the two blocking rods 5 to move closer to and further away from the outlets of their respective feed pipes 3. This reduces and expands the actual flow rate at the outlets of the two feed pipes 3 until the actual flow rate at the outlets of the two feed pipes 3 equals the mixing ratio of the two materials. Furthermore, by setting one end of the blocking rod to an inclined structure and adding two blocking rods that can move in opposite directions, the outlet sizes of the two feed pipes are adjusted in real time, ensuring that the total flow rate remains constant. This allows for dynamic adjustment of the flow rate ratio between the two feed pipes, thereby obtaining any feeding ratio.

[0044] Under the negative pressure of the negative pressure mechanism, the two feed pipes 3 simultaneously transport the materials in the two hoppers 1 to the mixing chamber 2. The two materials are mixed in real time according to the ratio, so that there will be no layering and accumulation, and the mixing is more uniform. The mixed material is transported to the next processing device by the discharge pipe 4.

[0045] The above are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above content. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A negative pressure material conveying device for uniform mixing, characterized in that, Includes a hopper, conveying pipe, mixing chamber, synchronous feeding control mechanism, and negative pressure mechanism; The material hopper is provided in two parts, and the conveying pipe includes two inlet pipes and one outlet pipe. The inlet pipes are connected between the mixing chamber and the material hopper, and the outlet pipe is connected to the mixing chamber. The negative pressure mechanism is connected to the outlet pipe. The synchronous feeding control mechanism includes a blocking rod, a switch transmission assembly, and a switch drive motor. The switch drive motor is fixedly installed on the outside of the mixing chamber. The switch transmission assembly includes a switch transmission gear and a switch transmission rack. There are two switch transmission racks and two blocking rods. The two switch transmission racks are respectively connected to the two blocking rods and are arranged horizontally opposite each other. The blocking rod is laterally movable in the mixing chamber. One end of the blocking rod is inclined and extends to the feed pipe, which is connected to the outlet of the mixing chamber. The synchronous feeding control mechanism also includes a clutch drive cylinder for driving the switch drive rack closer to or away from the switch drive gear. There are two clutch drive cylinders, which are fixedly mounted on two sealing rods respectively. The extension rods of the two clutch drive cylinders are respectively connected to the two switch drive racks. The switch drive racks are longitudinally movable and connected to the sealing rods. The other end of the sealing rod is laterally movable and is installed in the installation tube of the mixing cavity. The other end of the sealing rod is provided with a self-locking installation hole, which connects the inner cavity of the sealing rod and the inner wall of the installation tube. The synchronous feeding control mechanism also includes a self-locking structure for locking the sealing rod. This self-locking structure has two sets, each including a self-locking top pin, a swing rod, and a longitudinal connecting rod. The swing rod is hinged within the inner cavity of the sealing rod. With the hinge center of the swing rod as the boundary, both ends of the swing rod are connected to the self-locking top pin and the longitudinal connecting rod respectively through elongated holes. The self-locking top pin is longitudinally movable and positioned within the self-locking mounting hole of the sealing rod. The longitudinal connecting rod is fixedly connected to the switch transmission rack. When the switch transmission rack meshes with the switch transmission gear, the corresponding self-locking top pin moves away from the inner wall of the mounting tube. The inclined structure at one end of the sealing rod is a downward inclined surface, and limiting wings are provided on both sides of the inclined surface.

2. The uniformly mixed negative pressure material conveying device according to claim 1, characterized in that, A longitudinal guide structure is provided between the switch drive rack and the sealing rod. The longitudinal guide structure includes guide posts and guide holes. There are two guide posts, both of which are fixedly connected to the switch drive rack. There are two guide holes, which are opened on the sealing rod.

3. The uniformly mixed negative pressure material conveying device according to claim 2, characterized in that, One of the guide posts is formed by the longitudinal connecting rod.

4. The uniformly mixed negative pressure material conveying device according to claim 1, characterized in that, The mixing chamber is equipped with a discharge screen, which is located below the outlet of the feed pipe.

5. The uniformly mixed negative pressure material conveying device according to claim 4, characterized in that, The material feeding screen is equipped with stirring blades for stirring the falling material.

6. The uniformly mixed negative pressure material conveying device according to claim 1, characterized in that, The lower end of the mixing chamber is configured as a funnel structure.

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