Negative pressure type material conveying device with uniform mixing function

Abstract

The invention discloses a negative pressure type material conveying device with a uniform mixing function. The negative pressure type material conveying device comprises a stock bin, a conveying pipe, a mixing cavity, a synchronous feeding control mechanism and a negative pressure mechanism. The conveying pipe comprises two feeding pipes and a discharging pipe; the synchronous feeding control mechanism comprises a blocking rod, a switch transmission assembly and a switch driving motor, and the switch driving motor is fixedly arranged on the outer side of the mixing cavity; the switch transmission assembly comprises a switch transmission gear and two switch transmission racks, the number of the switch transmission racks and the number of the plugging rods are both two, the two switch transmission racks are connected with the two plugging rods respectively, and the two switch transmission racks are horizontally and oppositely arranged; the plugging rod can be transversely and movably arranged in the mixing cavity, and one end part of the plugging rod is of an inclined structure and extends to the feeding pipe to be connected to an outlet of the mixing cavity. The negative pressure type material conveying device not only can more uniformly mix two materials according to any proportion, but also has higher conveying efficiency.

Description

Technical Field

[0001] The invention relates to a material conveying device, in particular to a uniformly mixed negative pressure material conveying device. Background Art

[0002] In industrial production, material mixing and conveying devices are key equipment for achieving uniform mixing and continuous transmission of multiple materials, and their technology has been relatively mature. In the existing technology, common mixing and conveying devices mainly include screw conveying and mixing equipment, pneumatic conveying systems, and mechanical stirring conveying devices. Among them, pneumatic conveying systems use airflow energy to complete the suspension and transportation of materials in a closed pipeline, which is suitable for long-distance and high-cleanliness requirements.

[0003] For example, an existing pneumatic conveying system includes a negative pressure mechanism, two feed pipes, a mixing cavity and a discharge pipe. The two feed pipes are respectively connected to the side wall or the top of the mixing cavity. The outlets of the two feed pipes are provided with solenoid valves. The discharge pipe is connected to the bottom of the mixing cavity. 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 successively convey the two materials to the mixing cavity, and then convey them to the next processing device through the discharge pipe. Among them, the two feed pipes cannot perform feeding work, and can only successively convey different materials to the mixing cavity. This not only takes a lot of time, but more importantly, different materials fall into the mixing cavity successively, which will form layers from bottom to top, and the mixing is not uniform enough, which needs to be improved. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned problems and provide a uniformly mixed negative pressure material conveying device, which can not only mix two materials more uniformly and in any proportion, but also has a higher conveying efficiency.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A uniformly mixed negative pressure material conveying device, comprising a silo, a conveying pipe, a mixing chamber, a synchronous feeding control mechanism and a negative pressure mechanism;

[0007] The silo is provided with two, the conveying pipe includes two feed pipes and one discharge pipe, the feed pipe is connected between the mixing cavity and the silo, the discharge pipe is connected with the mixing cavity, and the negative pressure mechanism is connected with the discharge pipe;

[0008] The synchronous feeding control mechanism includes a blocking rod, a switch transmission assembly and a switch drive motor, and the switch drive motor is fixedly arranged on the outside of the mixing chamber; the switch transmission assembly includes a switch transmission gear and a switch transmission rack, and two switch transmission racks and two blocking rods are provided, and the two switch transmission racks are respectively connected to the two blocking rods, and the two switch transmission racks are horizontally arranged opposite to each other; the blocking rod can be laterally movably arranged in the mixing chamber, and one end of the blocking rod is an inclined structure and extends to the outlet of the mixing chamber where the feed pipe is connected.

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

[0010] During operation, according to the mixing ratio of the two materials, the switch drive motor drives the switch transmission gear to rotate, and the switch transmission gear drives the two switch transmission racks to move in the opposite direction, so that the two blocking rods are respectively close to and away from the outlets of the corresponding feed pipes, thereby reducing and expanding the actual flow of the outlets of the two feed pipes until the actual flow of the outlets of the two feed pipes is equal to the mixing ratio of the two materials. Furthermore, by setting one end of the blocking rod as an inclined structure and adding two blocking rods that can move in opposite directions, one in and one out, the outlet size of the two feed pipes is adjusted in real time, not only the total flow is guaranteed to remain unchanged, but also the ratio of the flow of the two feed pipes can be dynamically adjusted, thereby obtaining any feeding ratio.

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

[0012] A preferred solution of the present invention, wherein the synchronous feeding control mechanism further includes a clutch driving cylinder for driving the switch transmission rack to approach or move away from the switch transmission gear, the clutch driving cylinder is provided with two and fixedly arranged on two blocking rods respectively, the telescopic rods of the two clutch driving cylinders are respectively connected to the two switch transmission racks; the switch transmission rack is connected to the blocking rod in a longitudinally movable manner. Through the above structure, the clutch driving cylinder can independently drive the switch transmission rack to approach or move away from the switch transmission gear, switch between the independent feeding mode and the synchronous feeding mode, and unilaterally adjust the flow rate of one of the feed pipes, which has better flexibility and is suitable for different use occasions.

[0013] Furthermore, the other end of the blocking rod is laterally movable in the mounting tube of the mixing cavity, and the other end of the blocking rod is provided with a self-locking mounting hole, which is connected between the inner cavity of the blocking rod and the inner wall of the mounting tube;

[0014] The synchronous feeding control mechanism also includes a self-locking structure for locking the blocking rod, the self-locking structure is provided with two groups and each group includes a self-locking top pin, a swing rod and a longitudinal connecting rod, the swing rod is hinged in the inner cavity of the blocking rod, with the hinge center of the swing rod as the boundary, the two ends of the swing rod are respectively connected to the self-locking top pin and the longitudinal connecting rod through oblong holes; the self-locking top pin can be longitudinally movably arranged in the self-locking mounting hole of the blocking rod; the longitudinal connecting rod is fixedly connected to the switch transmission rack; when the switch transmission rack is meshed with the switch transmission gear, the corresponding self-locking top pin is away from the inner wall of the mounting tube.

[0015] Through the above structure, when it is necessary to push the blocking rod to adjust the flow of the feed pipe, the corresponding switch transmission rack is driven by the clutch drive cylinder to approach the switch transmission gear. At the same time, the longitudinal connecting rod moves longitudinally with the switch transmission rack, and the self-locking top pin is driven by the swing rod to move away from the inner wall of the installation tube to complete the unlocking action, and then the flow adjustment operation can be performed. After the opening adjustment is completed, the corresponding switch transmission rack is driven by the clutch drive cylinder to move away from the switch transmission gear, and the self-locking top pin is driven by the longitudinal connecting rod and the swing rod to approach and press against the inner wall of the installation tube to achieve the locking of the blocking rod, prevent the blocking rod from loosening and affecting the accurate feeding work, which is very clever. On the other hand, when it is necessary to convey one of the materials, the feed pipe corresponding to the other material is first blocked, and then the corresponding blocking rod is pushed against the inner wall of the installation tube by the self-locking top pin, so that the blocking rod corresponding to the other material is locked, and the conveying of the material is completely blocked; in this way, not only can only one of the materials be conveyed, but also the flow size of the material can be adjusted arbitrarily, which is very flexible.

[0016] Furthermore, a longitudinal guide structure is provided between the switch transmission rack and the blocking rod, and the longitudinal guide structure includes a guide column and a guide hole. Two guide columns are provided and are fixedly connected to the switch transmission rack, and two guide holes are provided and opened on the blocking rod.

[0017] Further, one of the guide columns is constituted by the longitudinal connecting rod.

[0018] In a preferred embodiment of the present invention, the inclined structure at one end of the blocking rod is a downwardly inclined surface, and limiting side wings are provided on both sides of the inclined surface to guide the material downward.

[0019] In a preferred embodiment of the present invention, a material dropping screen is provided in the mixing chamber, and the material dropping screen is arranged below the outlet of the feed pipe to disperse the incoming material for uniform mixing.

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

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

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

[0023] 1. The negative pressure material conveying device of the present invention can control the ratio of the actual flow rates of the outlets of the two feed pipes by arranging two blocking rods that can move in opposite directions. In this way, the two feed pipes can be opened at the same time to convey two materials at the same time, which not only improves the conveying efficiency but also can mix the two materials in proportion in real time, thereby preventing stratification and achieving a more uniform mixing.

[0024] 2. By setting one end of the blocking rod as an inclined structure and adding two blocking rods that can move in opposite directions, one in and one out, the outlet sizes of the two feed pipes can be adjusted in real time, which not only ensures that the total flow rate remains unchanged, but also can dynamically adjust the flow ratio of the two feed pipes, thereby obtaining any feeding ratio. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

[0028] Figure 4 It is a schematic diagram of the three-dimensional structure of the blocking rod of the present invention. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0030] Combination Figure 1 The uniformly mixed negative pressure material conveying device of this embodiment includes a silo 1, a conveying pipe, a mixing cavity 2, a synchronous feeding control mechanism and a negative pressure mechanism; the silo 1 is provided with two, the conveying pipe includes two feed pipes 3 and one discharge pipe 4, the feed pipe 3 is connected between the mixing cavity 2 and the silo 1, the discharge pipe 4 is connected with the mixing cavity 2, and the negative pressure mechanism is connected with the discharge pipe 4;

[0031] Combination Figure 1-Figure 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 arranged 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 the two switch transmission racks 8 are horizontally arranged opposite to each other; the blocking rod 5 can be laterally movably arranged in the mixing chamber 2, and one end of the blocking rod 5 is an inclined structure and extends to the outlet of the feeding pipe 3 connected to the mixing chamber 2.

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

[0033] Combination Figure 1-Figure 3 The synchronous feeding control mechanism also includes a clutch driving cylinder 11 for driving the switch transmission rack 8 to approach or move away from the switch transmission gear 7. The clutch driving cylinder 11 is provided with two and is respectively fixed on the two blocking rods 5. The telescopic rods of the two clutch driving cylinders 11 are respectively connected to the two switch transmission racks 8; the switch transmission rack 8 is connected to the blocking rod 5 in a longitudinally movable manner. Through the above structure, the clutch driving cylinder 11 can independently drive the switch transmission rack 8 to approach or move away from the switch transmission gear 7, switch between the independent feeding mode and the synchronous feeding mode, and unilaterally adjust the flow rate of one of the feeding pipes 3, which has better flexibility and is suitable for different use occasions.

[0034] Combination Figure 1-Figure 3 The other end of the blocking rod 5 can be laterally movably arranged in the mounting tube 12 of the mixing chamber 2, and the other end of the blocking rod 5 is provided with a self-locking mounting hole 5-1, which is connected between the inner cavity of the blocking 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 blocking rod 5, the self-locking structure is provided with two groups and each group includes 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 blocking 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 oblong holes; the self-locking top pin 13 is longitudinally movably arranged in the self-locking mounting hole 5-1 of the blocking rod 5; the longitudinal connecting rod 15 is fixedly connected to the switch transmission rack 8; when the switch transmission rack 8 is engaged with the switch transmission gear 7, the corresponding self-locking top pin 13 is away from the inner wall of the mounting tube 12.

[0036] Through the above structure, when it is necessary to push the blocking rod 5 to adjust the flow of the feed pipe 3, the corresponding switch transmission rack 8 is driven to approach the switch transmission gear 7 through the clutch drive cylinder 11, and at the same time, the longitudinal connecting rod 15 moves longitudinally with the switch transmission rack 8, and drives the self-locking ejector pin 13 away from the inner wall of the mounting tube 12 through the swing rod 14, completing the unlocking action, and then the flow adjustment operation can be performed. When the opening adjustment is completed, the corresponding switch transmission rack 8 is driven away from the switch transmission gear 7 through the clutch drive cylinder 11, and at the same time, the self-locking ejector pin 13 is driven to approach and press against the inner wall of the mounting tube 12 through the longitudinal connecting rod 15 and the swing rod 14, so as to achieve the locking of the blocking rod 5, prevent the blocking rod 5 from loosening and affecting the accurate feeding work, which is very clever. On the other hand, when it is necessary to convey one of the materials, the feed pipe corresponding to the other material is blocked first, and then the corresponding blocking rod is pushed against the inner wall of the mounting tube through the self-locking push pin, thereby locking the blocking rod corresponding to the other material and completely blocking the conveying of the material; in this way, not only can only one of the materials be conveyed, but the flow rate of the material can also be adjusted arbitrarily, which is very flexible.

[0037] Furthermore, a longitudinal guide structure is provided between the switch transmission rack 8 and the blocking rod 5, and the longitudinal guide structure includes a guide column and a guide hole. The guide columns are provided with two and are fixedly connected to the switch transmission rack 8, and the guide holes are provided with two and are opened on the blocking rod 5.

[0038] Furthermore, one of the guide columns is constituted by the longitudinal connecting rod 15 .

[0039] Combination Figure 2 A material dropping screen plate 16 is provided in the mixing chamber 2. The material dropping screen plate 16 is arranged below the outlet of the feed pipe 3 and is used to disperse the incoming materials for uniform mixing.

[0040] Combination Figure 2 The falling material screen plate 16 is provided with a stirring blade 17 for stirring the falling material to further improve the uniformity of mixing.

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

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

[0043] During operation, according to the mixing ratio of the two materials, the switch drive motor 6 drives the switch transmission gear 7 to rotate, and the switch transmission gear 7 drives the two switch transmission racks 8 to move in the opposite direction, so that the two blocking rods 5 are respectively close to and away from the outlets of the corresponding feed pipes 3, thereby reducing and expanding the actual flow of the outlets of the two feed pipes 3, until the actual flow of the outlets of the two feed pipes 3 is equal to the mixing ratio of the two materials. Further, by setting one end of the blocking rod as an inclined structure, adding two blocking rods that can move in the opposite direction, one in and one out, the outlet size of the two feed pipes is adjusted in real time, not only the total flow is guaranteed to remain unchanged, but also the ratio of the flow of the two feed pipes can be dynamically adjusted, so as to obtain 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 silos 1 to the mixing chamber 2, and the two materials are mixed in real time in proportion, so that there will be no stratified 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 is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited to the above content. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A uniformly mixed negative pressure material conveying device, characterized in that: It includes a silo, a conveying pipe, a mixing chamber, a synchronous feeding control mechanism and a negative pressure mechanism; The silo is provided with two, the conveying pipe includes two feed pipes and one discharge pipe, the feed pipe is connected between the mixing cavity and the silo, the discharge pipe is connected with the mixing cavity, and the negative pressure mechanism is connected with the discharge pipe; The synchronous feeding control mechanism includes a blocking rod, a switch transmission assembly and a switch drive motor, and the switch drive motor is fixedly arranged on the outside of the mixing chamber; the switch transmission assembly includes a switch transmission gear and a switch transmission rack, and two switch transmission racks and two blocking rods are provided, and the two switch transmission racks are respectively connected to the two blocking rods, and the two switch transmission racks are horizontally arranged opposite to each other; the blocking rod can be laterally movably arranged in the mixing chamber, and one end of the blocking rod is an inclined structure and extends to the outlet of the mixing chamber where the feed pipe is connected.

2. The uniformly mixed negative pressure material conveying device according to claim 1, characterized in that: The synchronous feeding control mechanism also includes a clutch drive cylinder for driving the switch transmission rack to approach or move away from the switch transmission gear. The clutch drive cylinder is provided with two and is respectively fixed on two blocking rods. The telescopic rods of the two clutch drive cylinders are respectively connected to the two switch transmission racks; the switch transmission rack is longitudinally movably connected to the blocking rod.

3. The uniformly mixed negative pressure material conveying device according to claim 2, characterized in that: The other end of the blocking rod is laterally movably arranged in the mounting tube of the mixing cavity. The other end of the blocking rod is provided with a self-locking mounting hole, which is connected between the inner cavity of the blocking rod and the inner wall of the mounting tube.

4. The uniformly mixed negative pressure material conveying device according to claim 3, characterized in that: The synchronous feeding control mechanism also includes a self-locking structure for locking the blocking rod, the self-locking structure is provided with two groups and each group includes a self-locking top pin, a swing rod and a longitudinal connecting rod, the swing rod is hinged in the inner cavity of the blocking rod, with the hinge center of the swing rod as the boundary, the two ends of the swing rod are respectively connected to the self-locking top pin and the longitudinal connecting rod through oblong holes; the self-locking top pin can be longitudinally movably arranged in the self-locking mounting hole of the blocking rod; the longitudinal connecting rod is fixedly connected to the switch transmission rack; when the switch transmission rack is meshed with the switch transmission gear, the corresponding self-locking top pin is away from the inner wall of the mounting tube.

5. The uniformly mixed negative pressure material conveying device according to claim 4, characterized in that: A longitudinal guide structure is provided between the switch transmission rack and the blocking rod, and the longitudinal guide structure includes a guide column and a guide hole. Two guide columns are provided and are fixedly connected to the switch transmission rack, and two guide holes are provided and opened on the blocking rod.

6. The uniformly mixed negative pressure material conveying device according to claim 5, characterized in that: One of the guide columns is formed by the longitudinal link.

7. The uniformly mixed negative pressure material conveying device according to claim 1, characterized in that: The inclined structure at one end of the blocking rod is a downwardly inclined surface, and both sides of the inclined surface are provided with limiting side wings.

8. The uniformly mixed negative pressure material conveying device according to claim 1, characterized in that: A material dropping screen plate is provided in the mixing cavity, and the material dropping screen plate is arranged below the outlet of the feeding pipe.

9. The uniformly mixed negative pressure material conveying device according to claim 8, characterized in that: The falling material screen is provided with stirring blades for stirring the falling materials.

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

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