Venturi tube

Abstract

This application relates to the field of fertilizer application equipment technology, and in particular to a Venturi tube. The Venturi tube includes an inlet section, a throat section, a diffuser section, and a control mechanism; the inlet section, throat section, and diffuser section are sequentially connected, and both the inlet section and diffuser section are tapered towards the throat section; a suction port is formed on the side wall of the throat section; the control mechanism includes a stop portion that movably covers the suction port to adjust the opening degree of the suction port. By moving the stop portion of the control mechanism, the opening degree of the suction port of the Venturi tube can be adjusted, thereby adjusting the negative pressure of its throat section. This allows for flexible adjustment and stable control of the negative pressure of the Venturi tube. When the Venturi tube is used for fertilization, the amount of fertilizer absorbed by the Venturi tube can be flexibly adjusted through the negative pressure.

Description

Technical Field

[0001] This application relates to the field of fertilizer application equipment technology, and in particular to a Venturi tube. Background Technology

[0002] A venturi tube is a pipe that gradually narrows and then widens. One of its main applications is as a fertilizer applicator. It achieves the purpose of sucking up fertilizer by generating negative pressure at the throat of the venturi tube.

[0003] Currently, the negative pressure level of the Venturi tube is usually adjusted by changing the ratio of the inner diameter of the throat to the transition section before and after it. Once set, it cannot be changed, so the negative pressure level of the throat cannot be adjusted, and the ability of the Venturi tube to generate negative pressure cannot be fully utilized, resulting in limitations such as insufficient fertilizer absorption. Summary of the Invention

[0004] The purpose of this application is to provide a venturi tube that, to a certain extent, solves the technical problem in the prior art where it is inconvenient to adjust the negative pressure, thus preventing the full utilization of the venturi tube's ability to generate negative pressure.

[0005] This application provides a venturi tube, including an inlet section, a throat section, a diffuser section, and a control mechanism;

[0006] The liquid inlet section, the throat section, and the diffusion section are connected in sequence, and both the liquid inlet section and the diffusion section are in a shape that gradually narrows towards the throat section;

[0007] The throat section has a suction port formed on its side wall. The control mechanism includes a stop that can be movably covered by the suction port to adjust the opening of the suction port.

[0008] In the above technical solution, the suction port is further provided at the connection between the throat section and the diffusion section.

[0009] In any of the above technical solutions, the control mechanism further includes a control section, the inside of which is provided with a buffer cavity, and the sidewall of the control section is formed with a first opening and a second opening communicating with the buffer cavity;

[0010] The first opening is used to feed material into the buffer chamber. The control section is connected to the throat section through the second opening and the suction port. The second opening coincides with the suction port so that the buffer chamber is connected to the throat section.

[0011] In any of the above technical solutions, the throat segment is further connected to the stop portion, and the stop portion movably covers the second opening along the length direction of the diffusion segment;

[0012] Along the length of the diffusion section, the length of the stop portion is not less than the length of the second opening.

[0013] In any of the above technical solutions, the control segment further includes an annular body and an annular extension, the annular body being spaced and sleeved around the outer periphery of the throat segment, and the annular extension being connected between the end of the diffusion segment and the end of the annular body facing the diffusion segment;

[0014] The buffer cavity is annular and opens inside the control section, with one end of the buffer cavity extending through the connection between the annular extension and the diffuser section, so that the second opening is arranged around the throat section.

[0015] In any of the above technical solutions, the control mechanism further includes a connecting part, which is connected between the throat section and the stop part. The outer periphery of the connecting part is screwed to the inner periphery of the throat section, so that the stop part can move along the length direction of the diffusion section relative to the throat section with the connecting part.

[0016] In any of the above technical solutions, the control mechanism further includes an operating part, which is sleeved on the connecting part. The inner periphery of one end of the operating part is screwed to the outer periphery of the connecting part that is not connected to the throat segment. The other end of the operating part extends in a direction away from the diffuser segment and forms a circumferential gap with the throat segment.

[0017] The end of the operating part that is not screwed to the connecting part is provided with a hand-held part.

[0018] In any of the above technical solutions, the venturi tube further includes a sealing element, which is disposed at the connection gap between the connecting portion and the throat section.

[0019] In any of the above technical solutions, the sealing element is further defined as a sealing sleeve, which is fitted around the outer periphery of the connecting portion and sandwiched between the connecting portion and the throat section.

[0020] In any of the above technical solutions, the venturi tube further includes a feeding section, which is connected to the control section through the first opening.

[0021] Compared with the prior art, the beneficial effects of this application are as follows:

[0022] The venturi tube provided in this application includes an inlet section, a throat section, a diffuser section, and a control mechanism. The inlet section, throat section, and diffuser section are sequentially connected, and both the inlet section and the diffuser section are tapered towards the throat section to create a negative pressure at the throat section. A suction port is formed on the side wall of the throat section for suction of material, and the inlet section for liquid intake, so that the liquid and material can be mixed in the throat section and output through the diffuser section. The control mechanism includes a stop that movably covers the suction port to adjust the opening of the suction port, thereby adjusting the negative pressure level of the throat section. The position of the stop is set, and the negative pressure level of the throat section is also set and stabilized at the set negative pressure.

[0023] The opening of the venturi tube's suction port can be adjusted by moving the stop part of the control mechanism, thereby adjusting the negative pressure in its throat section, and thus flexibly adjusting and stably controlling the magnitude of the negative pressure in the venturi tube.

[0024] This venturi tube can be used as a fertilizer venturi tube. When used for fertilization, the amount of fertilizer absorbed by the venturi tube can be flexibly adjusted by negative pressure. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the first structure of a venturi tube provided in an embodiment of this application;

[0027] Figure 2 This is a schematic diagram of the second structure of the Venturi tube provided in an embodiment of this application;

[0028] Figure 3 A first structural schematic diagram of the control mechanism for a venturi tube provided in an embodiment of this application;

[0029] Figure 4 A second structural schematic diagram of the control mechanism for a venturi tube provided in an embodiment of this application;

[0030] Figure 5 A third structural schematic diagram of the control mechanism for a venturi tube provided in an embodiment of this application;

[0031] Figure 6 This is a fourth structural schematic diagram of the control mechanism for a venturi tube provided in an embodiment of this application.

[0032] Figure label:

[0033] 1-Feeding section; 12-Liquid inlet section; 13-Throat section; 14-Control section; 140-Annular body; 141-Annular extension; 15-First diffusion section; 16-Second diffusion section; 2-Control mechanism; 21-Handheld part; 22-Operating part; 23-Connecting part; 24-Stop part. Detailed Implementation

[0034] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] See Figures 1 to 6 As shown, an embodiment of this application provides a venturi tube including an inlet section 12, a throat section 13, a diffuser section, and a control mechanism 2.

[0038] The above-mentioned components of the venturi tube will be described in detail below.

[0039] In an optional embodiment, the inlet section 12, the throat section 13, and the diffuser section are connected sequentially. Both the inlet section 12 and the diffuser section are tapered toward the throat section 13, thereby creating a negative pressure at the throat section 13 by utilizing the Venturi principle.

[0040] The liquid inlet section 12 is used to introduce diluent, which is used to dilute the fertilizer. The diluent is, for example, water. Under the negative pressure of the throat section 13, the diluent can be drawn from the liquid inlet section 12 and transported to the diffusion section.

[0041] The throat section 13 has a suction port on its side wall. Specifically, the suction port is a through hole opened along the thickness direction of the throat section 13. The suction port connects the inside and outside of the throat section 13, so that the fertilizer is drawn from the outside to the inside of the throat section 13 under the negative pressure of the throat section 13, thereby mixing the fertilizer and the diluent in the throat section 13 and then conveying it to the diffusion section.

[0042] The control mechanism 2 includes a stop 24, which movably covers the suction port to adjust the opening of the suction port. This adjustment of the opening of the suction port allows for the adjustment of the negative pressure level of the throat section 13. The mechanism is simple in structure and easy to adjust.

[0043] In order to achieve a diffusion gradient, the diffusion section includes a first diffusion section 15 and a second diffusion section 16. The second diffusion section 16 is connected to the end of the throat section 13 opposite to the liquid inlet section 12 through the first diffusion section 15. The rate of the first diffusion section 15 gradually shrinking toward the throat section 13 is less than the rate of the second diffusion section 16 gradually shrinking toward the rear.

[0044] In an optional embodiment, in order to facilitate the buffering effect of fertilizer delivery to the throat section 13, the control mechanism 2 further includes a control section 14. The control section 14 has a buffer cavity inside, and the side wall of the control section 14 has a first opening and a second opening that communicate with the buffer cavity.

[0045] The first opening is used to feed material into the buffer chamber. The control section 14 is connected to the throat section 13 through the second opening and the suction port, so that the buffer chamber and the throat section 13 are connected. That is, fertilizer can enter the buffer chamber through the first opening, be buffered by the buffer chamber, and thus enter the throat section 13 more evenly and at an appropriate speed through the second opening and the suction port, and mix with the diluent inside the throat section 13. The second opening and the suction port are aligned, so that they coincide in position.

[0046] In this embodiment, in order to improve the mixing effect between fertilizer and diluent, the suction port is set at the connection between the throat section 13 and the diffusion section. Since the throat section 13 needs to be connected to the diffusion section through the control section 14, the suction port can be set to coincide with the second opening.

[0047] In this embodiment, the venturi tube also includes a feeding section 1, which is connected to the control section 14 through a first opening, thereby supplying fertilizer to the buffer chamber of the control section 14 through the feeding section 1.

[0048] In this embodiment, the throat section 13 is connected to the stop section 24. The stop section 24 is movable to cover the second opening along the length direction of the diffusion section. That is, by adjusting the position of the stop section 24 along the length direction of the diffusion section, the opening of the second opening, i.e. the suction port, is adjusted.

[0049] Along the length of the diffusion section, the length of the stop part 24 is not less than the length of the second opening, that is, the length of the stop part 24 is not less than the length of the suction port, thereby ensuring that the opening adjustment range of the suction port can cover the two states of fully open and fully closed, as well as the various states in between.

[0050] In this embodiment, in order to improve the precision of the opening adjustment, the control section 14 includes an annular body 140 and an annular extension 141.

[0051] The annular body 140 is spaced around the outer periphery of the throat section 13, and the annular extension 141 connects the end of the diffuser section to the end of the annular body 140 facing the diffuser section, so that the control section 14 is generally annular around the throat section 13. Furthermore, the annular extension 141 can support the annular body 140, and the size of the annular body 140 can be specifically set according to actual needs.

[0052] The buffer chamber is annular and located inside the control section 14, surrounding the throat section 13. One end of the buffer chamber extends through the connection between the annular extension 141 and the diffuser section, so that the second opening is arranged around the throat section 13. Thus, on the one hand, since both the buffer chamber and the second opening are arranged around the throat section 13, the circumferential uniformity of fertilizer feeding into the throat section 13 can be improved. On the other hand, since the position of the stop part 24 is adjustable along the length direction of the diffuser section, which is also the length direction of the throat section 13, and the adjustable direction is perpendicular to the uniform distribution direction of the feed, the adjustable range of fertilizer absorption can be increased by adjusting the negative pressure.

[0053] In this embodiment, to facilitate the adjustment of the position of the stop 24, the control mechanism 2 further includes a connecting part 23. The connecting part 23 is connected between the throat section 13 and the stop 24, so that the connecting part 23 and the stop 24 move together. Specifically, the outer periphery of the connecting part 23 is screwed to the inner periphery of the throat section 13. By rotating the connecting part 23 relative to the control section 14, the connecting part 23 can move along the length direction of the diffuser section, thereby allowing the stop 24 to move along the length direction of the diffuser section with the connecting part 23 relative to the throat section 13. The length of the second opening covered by the stop 24 along the length direction of the diffuser section is adjusted to achieve the purpose of adjusting the opening of the second opening, that is, to achieve the purpose of adjusting the negative pressure of the throat section 13.

[0054] In this embodiment, the control mechanism 2 further includes an operating part 22, which is connected to the outer periphery of the connecting part 23. The connecting part 23 has one end exposed relative to the control section 14, and the exposed end relative to the control section 14 is provided with an external thread. The operating part 22 and the external thread of the connecting part 23 relative to the control section 14 are screwed together. That is, the throat section 13 is provided with connecting windows in an intermittent manner in the circumferential direction. The inner periphery of one end of the operating part 22 extends into the interior of the throat section 13 through the connecting window and is screwed together with the outer periphery of the end of the connecting part 23 that is not connected to the throat section 13. This does not affect the continuity of the axial structure of the throat section 13, nor does it affect the rotation of the operating part 22 along the circumferential direction of the throat section 13. By rotating the operating part 22, the connecting part 23 can be rotated relative to the control section 14, thereby realizing the position of the stop part 24 relative to the second opening along the length direction of the diffuser section. The operator does not need to directly adjust the connecting part 23, which facilitates the application of force.

[0055] Understandably, in order to ensure that the operating part 22 can move within the connecting window, it is necessary to ensure that the size of the connecting window is larger than the size of the operating part 22 in both the axial and circumferential directions along the throat section 13.

[0056] The other end of the operating part 22 extends in a direction away from the control section 14 and forms a circumferential gap with the throat section 13, thereby giving the operating part 22 sufficient length to increase the force application area of ​​the operator and increase the lever arm, making it easier to adjust the connecting part 23.

[0057] In this embodiment, a hand-held part 21 is provided at the end of the operating part 22 that is not screwed to the connecting part 23, thereby providing a force application point through the hand-held part 21, increasing the friction of rotating the operating part 22, and further improving the labor-saving degree.

[0058] Optionally, the handle 21 is a butterfly valve-shaped handle, and the number of handles 21 is at least one, for example, one or two.

[0059] In the optional embodiment, since the threaded connection between the connecting part 23 and the throat section 13 needs to be rotated frequently, there is a certain risk of leakage. In order to improve the sealing performance of the connection between the two, the venturi tube also includes a sealing element. The sealing element is disposed at the connection gap between the connecting part 23 and the throat section 13. The sealing element is, for example, a sealing ring or a sealing tape wrapped around the outer periphery of the connecting part 23.

[0060] In this embodiment, the sealing element is a sealing sleeve, which is sleeved on the outer periphery of the connecting part 23 and sandwiched between the connecting part 23 and the throat section 13. That is to say, the sealing sleeve is arranged in a manner that covers the entire length of the connecting part 23, so that after the connecting part 23 is adjusted, it can always maintain a state of sealing at the connection between the connecting part 23 and the throat section 13.

[0061] Optionally, the sealing sleeve is a rubber rotating sealing sleeve.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention. In addition, those skilled in the art can understand that although some embodiments described herein include certain features included in other embodiments but not other features, combinations of features of different embodiments are meant to be within the scope of the present invention and form different embodiments. For example, any one of the claimed embodiments can be used in any combination. The information disclosed in this background section is only intended to enhance the understanding of the overall background technology of the present invention, and should not be regarded as an admission or in any form implying that such information constitutes prior art known to those skilled in the art.

Claims

1. A venturi tube, characterized in that, Includes the inlet section, throat section, diffuser section, and control mechanism; The liquid inlet section, the throat section, and the diffusion section are connected in sequence, and both the liquid inlet section and the diffusion section are in a shape that gradually narrows towards the throat section; The throat section has a suction port formed on its side wall. The control mechanism includes a stop that can be movably covered by the suction port to adjust the opening of the suction port. The control mechanism further includes a control section, which includes an annular body and an annular extension. The annular body is spaced around the outer periphery of the throat section, and the annular extension is connected between the end of the diffuser section and the end of the annular body facing the diffuser section. The control mechanism further includes a connecting part, which is connected between the throat section and the stop part. The outer periphery of the connecting part is screwed to the inner periphery of the throat section, so that the stop part can move along the length direction of the diffuser section relative to the throat section with the connecting part. The control mechanism further includes an operating part, which is sleeved on the connecting part. The inner periphery of one end of the operating part is screwed to the outer periphery of the connecting part that is not connected to the throat segment. The other end of the operating part extends in a direction away from the diffuser segment and forms a circumferential gap with the throat segment. The end of the operating part that is not screwed to the connecting part is provided with a hand-held part.

2. The Venturi tube according to claim 1, characterized in that, The suction port is located at the connection between the throat section and the diffuser section.

3. The Venturi tube according to claim 2, characterized in that, The control section has a buffer cavity inside, and the sidewall of the control section has a first opening and a second opening that communicate with the buffer cavity. The first opening is used to feed material into the buffer chamber. The control section is connected to the throat section through the second opening and the suction port. The second opening coincides with the suction port so that the buffer chamber is connected to the throat section.

4. The Venturi tube according to claim 3, characterized in that, The throat section is connected to the stop portion, and the stop portion movably covers the second opening along the length direction of the diffuser section; Along the length of the diffusion section, the length of the stop portion is not less than the length of the second opening.

5. The Venturi tube according to claim 4, characterized in that, The buffer cavity is annular and opens inside the control section, with one end of the buffer cavity extending through the connection between the annular extension and the diffuser section, so that the second opening is arranged around the throat section.

6. The Venturi tube according to claim 1, characterized in that, It also includes a sealing element disposed at the connection gap between the connecting portion and the throat section.

7. The Venturi tube according to claim 6, characterized in that, The sealing element is a sealing sleeve, which is fitted around the outer periphery of the connecting part and sandwiched between the connecting part and the throat section.

8. The Venturi tube according to claim 3, characterized in that, The venturi tube also includes a feeding section, which is connected to the control section through the first opening.

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