Venturi type material conveying mechanism

Abstract

The utility model relates to the technical field of material conveying, in particular to a Venturi type material conveying mechanism. The venturi type material conveying mechanism comprises a longitudinally-arranged feeding pipe and a venturi pipe, the middle section part of the conveying pipe is communicated to the lower end of the feeding pipe; wherein a throat-shaped annular part is arranged on the upstream side of the conveying pipe at the communicating position of the conveying pipe and the feeding pipe, and the inner diameter of the throat-shaped annular part is gradually reduced in the direction from the upstream side to the downstream side. According to the utility model, the material conveying pipe forms a Venturi type structure through the throat knot annular part, and reliable and stable conveying of materials can be realized by combining the longitudinal arrangement of the feeding pipe and the horizontal arrangement of the material conveying pipe.

Description

TECHNICAL FIELD

[0001] The utility model relates to material conveying technical field especially relates to a venturi material conveying mechanism. BACKGROUND

[0002] Bagged powder lime unloading and conveying devices are widely used in industry, especially in the fields of chemical industry, construction, and environmental protection. According to production needs, bagged powder lime unloading and conveying devices come in various forms, mainly including pneumatic conveying, screw conveying, and vibration conveying.

[0003] The future trend of bagged powder lime unloading and conveying devices is towards intelligence, automation, environmental protection, energy saving, and high efficiency. Negative pressure dust-free systems will become the industry standard, especially under the background of increasing importance of dust control and environmental protection. These trends not only improve production efficiency, but also ensure the health and safety of operators and meet increasingly stringent environmental protection standards. SUMMARY

[0004] I. Technical problems to be solved

[0005] The utility model expects to at least partially solve one of the above technical problems.

[0006] II. Technical solutions

[0007] The utility model provides a venturi material conveying mechanism. The venturi material conveying mechanism comprises: a longitudinally arranged feed pipe; a horizontally arranged material conveying pipe, the middle section of the material conveying pipe is connected to the lower end of the feed pipe; wherein, a throat nodule annular component is arranged on the upstream side of the material conveying pipe at the communication between the material conveying pipe and the feed pipe, and the inner diameter of the throat nodule annular component gradually decreases in the direction from the upstream side to the downstream side.

[0008] In some embodiments of the utility model, a throat nodule bottom air groove is formed in the throat nodule annular component near the bottom of the material conveying pipe.

[0009] In some embodiments of the utility model, the throat nodule bottom air groove is left-right symmetrical relative to the longitudinal section of the material conveying pipe about the center axis.

[0010] In some embodiments of the utility model, the cross-sectional shape of the throat nodule bottom air groove is rectangular, fan-shaped, or arc-shaped.

[0011] In some embodiments of the utility model, the flow area S2 of the throat nodule bottom air groove satisfies: Wherein, S1 is the flow area of the narrowest part of the throat nodule.

[0012] In some embodiments of the utility model, throat knot bottom air groove is rectangular, throat knot bottom air groove's opening width is between 3mm~10mm, depth is between 3mm~10mm, the cross section area S2 of through flow satisfies: 15mm 2 ≤S2≤30mm 2 .

[0013] In some embodiments of the utility model, further include: bearing platform;The feeding pipe passes through the bottom of bearing platform and extends upwards, forms the puncture tip at the top of feeding pipe.

[0014] In some embodiments of the utility model, puncture tip is: single plane cutting tip or double plane cutting tip.

[0015] In some embodiments of the utility model, the acute angle formed by puncture tip is between 15°~45°.

[0016] In some embodiments of the utility model, bearing platform is arc bearing platform, and the feeding pipe passes through the arc bottom of arc bearing platform.

[0017] In some embodiments of the utility model, the height of feeding pipe extending above bearing platform is greater than or equal to 50mm.

[0018] In some embodiments of the utility model, N ring suction holes are arranged on the circumference of feeding pipe close to the bottom of bearing platform, and N≥2.

[0019] In some embodiments of the utility model, N≥8.

[0020] In some embodiments of the utility model, the diameter of ring suction hole is between 3mm~10mm.

[0021] In some embodiments of the utility model, the material conveyed is powder.

[0022] In some embodiments of the utility model, the diameter of feeding pipe is less than the diameter of material conveying pipe.

[0023] In some embodiments of the utility model, the throat knot annular part is fixed to the inner side of material conveying pipe through throat knot fixing screw.

[0024] In some embodiments of the utility model, the feeding pipe is arranged in vertical direction or oblique downward direction.

[0025] In some embodiments of the utility model, the material conveying pipe is arranged in horizontal direction or oblique downward direction.

[0026] In some embodiments of the utility model, the compressed air inlet is formed at the end of material conveying pipe upstream side;Gas material mixture outlet is formed at the end of material conveying pipe downstream side.

[0027] III. Beneficial Effects

[0028] From the above technical solutions, the utility model has at least one of the following beneficial effects relative to the prior art:

[0029] (1) In the utility model, the throat knot annular part forms a Venturi structure for the material conveying pipe, and the material conveying pipe is horizontally arranged in combination with the longitudinal arrangement of the feeding pipe, so that reliable and stable conveying of the material can be realized.

[0030] (2) In the utility model, the arc-shaped bearing platform and the puncture tip are used, so that after the packaging bag is poked, the powdery material can fall into the material conveying pipe under the action of its own gravity, thereby facilitating the unloading of the bagged powdery material.

[0031] (3) In the utility model, the throat knot bottom air groove is processed at the lower part of the throat knot annular part, and after the gas passes through the throat knot bottom air groove, a gas buffer zone can be formed at the bottom position of the material conveying pipe corresponding to the feeding pipe on the right side of the throat knot annular part, so that the accumulation and blockage of the slaked lime can be prevented.

[0032] (4) In the utility model, when the air with a pressure of more than 4000 Pa is introduced into the left side of the material conveying pipe, the feeding pipe will present a negative pressure, and the slaked lime scattered along the outside of the feeding pipe will be sucked into the feeding pipe from the annular suction hole at the lower part of the feeding pipe, thereby avoiding the escape of the dust. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a structural schematic view of a Venturi-type material conveying mechanism according to an embodiment of the utility model.

[0034] Figure 2 is Figure 1 is a schematic view of a throat knot annular part of the Venturi-type material conveying mechanism. DETAILED DESCRIPTION

[0035] To solve the problems in the background art, the utility model provides a Venturi-type material conveying mechanism, which has the characteristics of not needing to separately configure a dust removal device and preventing blockage and accumulation.

[0036] To make the purpose, technical scheme and advantages of the utility model clearer and more apparent, the following further describes the utility model in combination with specific embodiments and with reference to the drawings.

[0037] The utility model provides a Venturi-type material conveying mechanism. Figure 1 is a structural schematic view of a Venturi-type material conveying mechanism according to an embodiment of the utility model. Figure 1 As shown in the drawing, the Venturi-type material conveying mechanism according to the embodiment comprises:

[0038] a bearing platform 6;

[0039] A longitudinally arranged feeding pipe 4 which penetrates the bottom of the support platform and extends upwardly;

[0040] A horizontally arranged conveying pipe 1, the middle section of which is connected to the lower end of the feeding pipe;

[0041] Wherein, a throat ring-shaped part 2 is arranged on the upstream side of the conveying pipe at the position where the conveying pipe and the feeding pipe are connected, and the inner diameter of the throat ring-shaped part 2 gradually decreases in the direction from the upstream side to the downstream side.

[0042] In this embodiment, the conveying pipe is formed into a Venturi structure by the throat ring-shaped part, and the feeding pipe is arranged longitudinally and the conveying pipe is arranged horizontally, so that reliable and stable conveying of the material can be realized.

[0043] The various components of the Venturi material conveying mechanism of this embodiment will be described in detail below.

[0044] The Venturi material conveying mechanism of this embodiment is designed for bagged powdery slaked lime, more specifically, for unloading and conveying of slaked lime powder packaged in a bulk bag with a bottom edge of 1m*1m and a height of 1.25m. However, the present utility model is not limited thereto. In other embodiments of the present utility model, it can also be applied to the conveying of other powders or small-particle-diameter granular materials, and is also within the protection scope of the present utility model.

[0045] The concept of the present utility model is to realize integrated unloading and conveying, therefore, the support platform 6 is an arc-shaped support platform, and the top of the feeding pipe 4 is formed into a piercing tip 41. By arranging the arc-shaped support platform and the piercing tip, the unloading of the bagged powdery material is greatly facilitated.

[0046] In the present utility model, the maximum radius of the support platform 6 is greater than the maximum size of the bottom of the bulk bag, and the radius of curvature is not greater than 2m. Specifically, in this embodiment, the maximum radius of the support platform 6 is 0.6m, and the radius of curvature is 1.5m.

[0047] It should be noted that this embodiment provides integrated unloading and conveying, and therefore the support platform 6 is needed to carry the bagged powdery slaked lime. However, in other embodiments of the present utility model, unloading may not be needed and only conveying is needed, in which case the support platform 6 can be omitted.

[0048] In the present utility model, the piercing tip 41 is a single-plane cutting tip or a double-plane cutting tip, and the acute angle formed by the piercing tip is between 15° and 45°. Specifically, in this embodiment, the piercing tip 41 is a single-plane cutting tip, and the acute angle formed by the piercing tip is 40°. The beneficial effect of such an arrangement is that it is simple to prepare, and the mechanical strength of the piercing tip is relatively large, thereby avoiding bending of the piercing tip due to the violent impact of the slaked lime packaging bag.

[0049] In the utility model, the diameter of the feeding pipe 4 must be smaller than the diameter of the conveying pipe 1, and the length of the feeding pipe 4 above the bearing platform 6 should be short enough to ensure that the feeding pipe 4 can completely pierce the package and just immerse in the slaked lime. Specifically, in the embodiment, the diameter of the conveying pipe 1 is 100 mm, and the diameter of the feeding pipe 4 is 50 mm. The shortest length of the feeding pipe 4 above the bearing platform 6 is 50 mm.

[0050] In the utility model, the feeding pipe 4 is arranged along the vertical direction or the oblique downward direction, and the conveying pipe 1 is arranged along the horizontal direction or the oblique downward direction. In this way, after the package is pierced, the slaked lime can fall into the conveying pipe under the action of gravity. Specifically, in the embodiment, the feeding pipe is arranged along the vertical direction, and the conveying pipe is arranged along the horizontal direction. The feeding pipe and the conveying pipe have the advantages of simple structure, regular shape and low maintenance cost.

[0051] In the embodiment, the laryngeal prominence annular part 2 is fixed to the inner side of the conveying pipe through the laryngeal prominence fixing screw 7, and the laryngeal prominence annular part 2 forms a Venturi structure of the conveying pipe. The compressed air inlet 11 is formed at the end of the upstream side of the conveying pipe, and the gas material mixture outlet 12 is formed at the end of the downstream side of the conveying pipe.

[0052] When the Venturi material conveying mechanism works, the bagged powder slaked lime is placed on the bearing platform 6, the piercing tip 41 at the upper end of the feeding pipe pierces the package and extends into the slaked lime, the compressed air inlet 11 at the left side of the conveying pipe is connected to the air with a pressure of 4000 Pa or more, the flow rate of the air increases after passing through the laryngeal prominence annular part 2, a negative pressure area is formed near the feeding pipe 4 at the right side of the laryngeal prominence annular part 2, the slaked lime falls into the conveying pipe 1 from the feeding pipe 4 under the action of gravity and atmospheric pressure, and the slaked lime is mixed with the air flowing in the conveying pipe 1, and then the slaked lime is conveyed to the right side of the conveying pipe 1 under the action of the airflow, and finally the slaked lime is discharged from the gas material mixture outlet 12 to the target equipment or container.

[0053] In the production practice, the applicant further finds that when the slaked lime enters the conveying pipe from the feeding pipe, the horizontal conveying airflow is difficult to change the flow direction of the powder, and the slaked lime is often accumulated and blocked at the right side of the laryngeal prominence annular part 2, which finally leads to the blockage of the system.

[0054] To solve this problem, please refer to Figure 2 In the embodiment, the laryngeal prominence bottom air groove 3 is processed at the lower part of the laryngeal prominence annular part 2. After the gas passes through the laryngeal prominence bottom air groove 3, the gas buffer area can be formed at the bottom of the conveying pipe 1 corresponding to the feeding pipe 4 at the right side of the laryngeal prominence annular part 2, so that the accumulation and blockage of the slaked lime can be prevented.

[0055] Specifically, in the embodiment, the throat knot bottom gas groove 3 adopts a rectangular opening in the form of a key groove, and the flow area thereof is related to the gas pressure in the conveying pipe 1 and the flow area of the narrow part on the right side of the throat knot annular part 2. Specifically, when the gas pressure in the conveying pipe 1 is between 4 kPa and 5 kPa, the diameter of the narrow part on the right side of the throat knot annular part 2 is 60 mm, the opening width of the throat knot bottom gas groove 3 is 6 mm, the opening depth is 4 mm, and the flow area is about 24 mm 2 .

[0056] Those skilled in the art should understand that the above is only a preferred embodiment of the utility model. In other embodiments of the utility model, the throat knot bottom gas groove can also be:

[0057] (1) Opening cross-sectional shape

[0058] In addition to the rectangle, the opening cross section of the throat knot bottom gas groove can also be: a sector or an arc shape, etc.

[0059] (2) Symmetry

[0060] In order to ensure that the slaked lime inside the conveying pipe 1 is symmetrically removed, the throat knot bottom gas groove is left-right symmetrical with respect to the longitudinal section of the conveying pipe passing through the center axis.

[0061] (3) Opening size

[0062] The opening size of the throat knot bottom gas groove is related to the degree of accumulation of the powdery material. Typically, the opening width of the throat knot bottom gas groove is between 3 mm and 10 mm, and the depth is between 3 mm and 10 mm.

[0063] (4) Flow area

[0064] The flow area S2 of the throat knot bottom gas groove satisfies: Wherein, S1 is the flow area of the narrowest part of the throat knot. Typically, the flow area S2 satisfies: 15 mm 2 ≤S2≤30 mm 2 .

[0065] In production practice, the applicant further found that: in the process of piercing the packaging bag by the feeding pipe 4 and taking away the packaging bag after unloading is completed, the slaked lime powder will scatter onto the arc-shaped bearing platform 6 along the outside of the feeding pipe 4, and the dust will escape. If a separate dust removal device is configured, on the one hand, the cost is high, and on the other hand, the equipment will become more bloated.

[0066] To solve this problem, please refer to Figure 1 In the embodiment, N ring suction holes 5 are arranged on the circumference of the feeding pipe near the bottom of the bearing platform, N≥2, and the diameter of the ring suction hole is between 3 mm and 10 mm. Specifically, the diameter of the ring suction hole 5 is 5 mm, and 8 ring suction holes are uniformly distributed on the circumference of the feeding pipe.

[0067] In this way, when the left side of the material conveying pipe 1 is connected to air with a pressure of 4000 Pa or above, the material conveying pipe 4 will have a negative pressure, and the lime dust scattered outside the material conveying pipe 4 will be sucked into the material conveying pipe 4 through the ring suction holes 5 at the lower part of the material conveying pipe, so as to avoid dust escaping.

[0068] Those skilled in the art can understand that the position, shape, aperture, number and the like of the ring suction holes can be adjusted according to actual needs, and are not limited to the above embodiments.

[0069] Through actual use, the Venturi material conveying mechanism of the embodiment can stably convey the lime dust to a container 20 meters away when the compressed air inlet 11 is continuously connected to air with a pressure of 4-5 kPa, and the conveying process has no material blocking phenomenon. When the material conveying pipe 4 pierces the lime dust bag, no dust escapes. When the lime dust bag is removed after the unloading is completed, the bag can be slowly lifted to completely avoid dust escaping, and most of the lime dust at the bottom of the bag will enter the material conveying pipe 1 through the material conveying pipe 4, and a small part will enter the material conveying pipe 1 through the ring suction holes at the lower part of the material conveying pipe, so as to avoid waste and pollution.

[0070] Thus, the embodiments of the present application are introduced. Based on the above description, those skilled in the art should have a clear understanding of the present application.

[0071] For some implementations, if they are not the key content of the present application, and are well known to those skilled in the art, due to the limitation of the length, they are not described in detail in the drawings or the text of the specification. At this time, it can be understood by referring to the related prior art. Moreover, the purpose of providing the above embodiments is only to meet the legal requirements, and the present application can be implemented in many different forms, and should not be interpreted as being limited to the embodiments described herein.

[0072] It should be further noted that the directional phrases mentioned in the embodiments, such as "center", "transverse", "longitudinal", "top", "bottom", "upper", "lower", "front", "rear", "left", "right", "inner", "outer" and the like, only indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. And, throughout the drawings, the same elements are represented by the same or similar reference numerals. Moreover, the shapes and sizes of the components in the drawings do not reflect the actual size and ratio, but only illustrate the content of the embodiments of the present application.

[0073] In the description of the utility model, it is necessary to explain that, unless there is definite stipulation and limitation, the term "connection" should be understood in a broad sense, for example, it can be fixed connection, also can be detachable connection, or integral connection, can be direct connection, also can be indirect connection through intermediate medium, can be the communication inside two elements. For ordinary skilled person in the art, the specific meaning of the above-mentioned term can be understood according to specific circumstances.

[0074] The skilled person in the art should understand that in the utility model claims and the specification, the word "comprising" does not exclude the presence of elements not listed in the claims. The word "a" or "an" preceding the elements in the claims does not exclude the presence of multiple such elements.

[0075] Similarly, it should be understood that, in order to simplify the utility model, in the above description of the exemplary embodiments of the utility model, various features of the utility model are sometimes grouped together in a single embodiment, figure or the description thereof. However, the method of the utility model should not be interpreted as reflecting the intention that the claimed utility model needs more features than the features explicitly recorded in each claim. More precisely, as reflected in the claims, each utility model aspect is based on less than all the features of the preceding single embodiment. And, the embodiments can be mixed and used with each other or other embodiments based on design and reliability considerations, that is, the technical features in different embodiments can be freely combined to form more embodiments. Therefore, the claims following the specific embodiment are hereby expressly incorporated into the specific embodiment, wherein each claim itself is as a separate embodiment of the utility model.

[0076] The above various specific embodiments, the purpose, technical means and beneficial effects of the utility model are described in detail, it should be understood that the purpose of detailed description is that the skilled person can understand the utility model more clearly, and is not used to limit the utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A Venturi material conveying mechanism, characterized by, Comprising: a vertically arranged feeding pipe; a horizontally arranged conveying pipe, a middle section of which is communicated to a lower end of the feeding pipe; wherein a throat ring-shaped part is arranged on an upstream side of the conveying pipe at a position where the conveying pipe is communicated to the feeding pipe, and an inner diameter of the throat ring-shaped part gradually decreases in a direction from the upstream side to a downstream side.

2. The Venturi-type material conveying mechanism according to claim 1, wherein: a throat bottom air groove is formed on the throat ring-shaped part near a bottom of the conveying pipe.

3. The Venturi-type material conveying mechanism according to claim 2, wherein: the throat bottom air groove is left-right symmetrical relative to a longitudinal section of the conveying pipe about a center axis; and / or, a cross-sectional shape of the throat bottom air groove is rectangular, fan-shaped or arc-shaped; And / or, the throat bottom air groove flow area S2 satisfies: Wherein, S1 is the throat narrowest place flow area.

4. The Venturi-type material conveying mechanism according to claim 3, wherein: the throat bottom air groove is rectangular. The opening width of the bottom air groove of the Adam's apple is between 3mm and 10mm, the depth is between 3mm and 10mm, and the flow area S2 satisfies: 15mm 2 ≤S2≤30mm 2 .

5. The Venturi-type material conveying mechanism according to claim 1, further comprising: a bearing platform; the feeding pipe penetrates a bottom of the bearing platform and extends upwardly to form a piercing tip at a top of the feeding pipe.

6. The Venturi-type material conveying mechanism according to claim 5, wherein: the piercing tip is a single-plane cutting tip or a double-plane cutting tip; and / or, an acute angle formed by the piercing tip is between 15° and 45°.

7. The Venturi-type material conveying mechanism according to claim 5, wherein: the bearing platform is an arc-shaped bearing platform, and the feeding pipe penetrates an arc bottom of the arc-shaped bearing platform; and / or, a height of the feeding pipe extending above the bearing platform is greater than or equal to 50 mm.

8. The Venturi material transport mechanism of claim 5, wherein, N ring suction holes are arranged on a circumferential direction of the feeding pipe near a bottom of the bearing platform, and N≥2.

9. The Venturi-type material conveying mechanism according to claim 8, wherein: N≥8； and / or, a diameter of the ring suction hole is between 3 mm and 10 mm.

10. The Venturi-type material conveying mechanism according to any one of claims 1 to 9, wherein: the material to be conveyed is powder; and / or, a diameter of the feeding pipe is smaller than a diameter of the conveying pipe; and / or, the throat ring-shaped part is fixed to an inner side of the conveying pipe by a throat fixing screw; and / or, the feeding pipe is arranged in a vertical direction or an oblique downward direction; and / or, the conveying pipe is arranged in a horizontal direction or an oblique downward direction; and / or, a compressed air inlet is formed at an end of the conveying pipe on the upstream side, and a gas-material mixture outlet is formed at an end of the conveying pipe on the downstream side.

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