Ejector

Abstract

The utility model discloses an ejector which comprises an ejection pipe, a material receiving cavity, a mixing cavity and a conveying cavity which are sequentially communicated with one another are arranged in the ejection pipe, the ejector further comprises a nozzle which is arranged in the ejection pipe, and a gas ejection outlet of the nozzle is communicated with the material receiving cavity; the guide sleeve is arranged in the injection pipe and is adjacent to the gas inlet of the nozzle, and a gas inlet pipeline located on the injection pipe body is arranged between the guide sleeve and the nozzle; the end cover is in threaded connection with the other end of the injection pipe, a piston cavity is formed by a gap between the end cover and the guide sleeve, a piston ring and an elastic piece are arranged in the piston cavity, and the two ends of the elastic piece elastically abut against the piston ring and the end cover correspondingly; the needle tip end of the adjusting needle sequentially penetrates through the end cover, the piston ring and the guide sleeve and is finally inserted into the nozzle inner hole; and two ends of the pressure guide pipe are respectively communicated with the conveying cavity and the piston cavity of the injection pipe. The gas output of the nozzle can be adjusted, the gas output of the nozzle is increased, and then the thrust of the ejector is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of material conveying, in particular to an ejector. Background Art

[0002] Ejectors are widely used in industry. They use compressed gas as power to eject liquids and solids. The two different media exchange energy in the mixing chamber to form a mixed fluid with a medium pressure, which generates sufficient injection thrust at the diffuser to complete the transportation.

[0003] Existing ejectors are generally carefully designed and calculated before production, with fixed shapes and sizes corresponding to corresponding working conditions. Fixed shape and size mean that their ejection thrust is constant. However, in pipelines for compressed pneumatic conveying of solids, since the flow state of solid materials is different from that of conventional fluids, it often causes gas pressure fluctuations in the pipeline. Ejectors with fixed shapes and sizes cannot cope with pressure fluctuations in pneumatic conveying pipelines, and are prone to failures of upstream and downstream equipment due to backflow caused by insufficient thrust of the ejector. Utility Model Content

[0004] The utility model aims to provide an ejector, the nozzle gas output can be adjusted, and the nozzle gas output can be increased, so that the force of the airflow can be increased without changing the airflow velocity, thereby increasing the thrust of the ejector, thereby solving the above technical problems.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] An ejector, comprising an ejection pipe, wherein the ejection pipe is provided with a material receiving chamber, a mixing chamber, and a conveying chamber which are connected in sequence, wherein the conveying chamber is located at one end of the ejection pipe, and further comprising:

[0007] A nozzle is arranged inside the injection pipe, and its gas injection outlet is communicated with the material receiving chamber;

[0008] A guide sleeve is arranged inside the injection pipe and adjacent to the gas inlet of the nozzle, and an air intake pipe located on the injection pipe body is arranged between the guide sleeve and the nozzle;

[0009] An end cover is threadedly connected to the other end of the injection pipe. The gap between the end cover and the guide sleeve forms a piston cavity. A piston ring and an elastic member are arranged inside the piston cavity. Two ends of the elastic member are elastically abutted against the piston ring and the end cover respectively.

[0010] The tip of the adjusting needle passes through the end cover, the piston ring and the guide sleeve in sequence and is finally inserted into the inner hole of the nozzle. The end of the adjusting needle exposed from the end cover is threadedly connected with a positioning nut. The adjusting needle body is provided with a positioning assembly for positioning the piston ring.

[0011] The two ends of the pressure-introducing tube are respectively connected with the delivery chamber and the piston chamber of the injection tube, and the pressure-introducing tube introduces the pressure gas in the delivery chamber into the piston chamber to push the piston ring to compress the elastic member and drive the adjusting needle to move.

[0012] Furthermore, the outer periphery, inner hole and inner hole of the piston ring and the guide sleeve are all provided with sealing rings, the sealing ring on the outer periphery of the piston ring forms a seal with the inner wall of the piston cavity, and the sealing rings on the inner hole of the piston ring and the inner hole of the guide sleeve both form a seal with the outer wall of the adjusting needle.

[0013] Furthermore, the inner hole of the nozzle is tapered, and the depth at which the tip of the adjusting needle enters the inner hole of the nozzle determines the amount of gas passing through the inner hole of the nozzle per unit time.

[0014] Furthermore, the injection pipe is provided with an ejector pipe communicating with the material receiving cavity.

[0015] Furthermore, the mixing chamber and the conveying chamber are transitionally connected by a diffusion chamber.

[0016] Furthermore, the positioning assembly includes a positioning convex ring and a retaining spring which are arranged on the adjusting needle body and are respectively located on two side surfaces of the piston ring, wherein the retaining spring is engaged in a groove arranged on the adjusting needle body.

[0017] Furthermore, a filter is provided on the pressure-guiding pipe.

[0018] Furthermore, the material receiving chamber and the mixing chamber are connected by a tapered transition.

[0019] Furthermore, the air intake pipeline is connected to compressed air through an air pipe, and the air pipe is connected to a filter pressure regulating valve.

[0020] The beneficial effects of the utility model are:

[0021] With the help of the pressure-inducing pipe, pressurized gas is introduced from the delivery cavity of the injection pipe into the piston cavity to push the piston ring to compress the elastic member and drive the adjustment needle to move. At this time, the tip of the adjustment needle is away from the inner hole of the nozzle, and the space of the inner hole of the nozzle becomes larger. At this time, the gas output of the inner hole of the nozzle becomes larger, and the force of the airflow can be increased without increasing the airflow velocity, thereby increasing the thrust of the injector. In addition, not increasing the airflow velocity means not increasing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] Figure 1 It is a stereogram of the utility model.

[0024] Figure 2 It is a front cross-sectional view of the utility model.

[0025] Figure 3 yes Figure 2 Enlarged view of point A in .

[0026] In the figure: 1. injection pipe, 100. material receiving chamber, 101. mixing chamber, 102. conveying chamber, 103. piston chamber, 104. diffusion chamber, 2. nozzle, 3. guide sleeve, 4. air intake pipe, 5. end cover, 6. piston ring, 7. elastic part, 8. adjusting needle, 9. positioning nut, 10. pressure guide pipe, 11. sealing ring, 12. injection pipe, 13. positioning convex ring, 14. retaining ring, 15. filter, 16. filter pressure regulating valve. DETAILED DESCRIPTION

[0027] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] like Figure 1-3 As shown, in order to solve the above technical problems, the utility model adopts the following technical solutions:

[0029] An ejector comprises an ejection pipe 1, a nozzle 2, a guide sleeve 3, an end cover 5, an adjustment needle 8, and a pressure-inducing pipe 10. The ejection pipe 1 is provided with a material receiving chamber 100, a mixing chamber 101, and a conveying chamber 102 which are connected in sequence, wherein the conveying chamber 102 is located at one end of the ejection pipe 1. A tapered mouth transition connection is adopted between the material receiving chamber 100 and the mixing chamber 101 to reduce the pipeline friction during the material conveying process and make the material conveying smoother. A diffusion chamber 104 is adopted between the mixing chamber 101 and the conveying chamber 102 to transitionally connect. The function of the diffusion chamber 104 is to decelerate and increase the pressure, thereby improving the conveying efficiency of the material. The ejection pipe 1 is provided with an ejection pipe 12 which is connected with the material receiving chamber 100.

[0030] The nozzle 2 is arranged inside the injection pipe 1, and its gas injection outlet is communicated with the material receiving chamber 100;

[0031] The guide sleeve 3 is arranged inside the injection pipe 1 and adjacent to the gas inlet of the nozzle 2. An air intake pipe 4 located on the injection pipe 1 body is arranged between the guide sleeve 3 and the nozzle 2. The inner hole of the guide sleeve 3 and the inner hole of the nozzle 2 are axially overlapped.

[0032] The end cover 5 is threadedly connected to the other end of the injection pipe 1. The gap between the end cover 5 and the guide sleeve 3 forms a piston cavity 103. A piston ring 6 and an elastic member 7 are arranged inside the piston cavity 103. The two ends of the elastic member 7 are elastically abutted against the piston ring 6 and the end cover 5 respectively. The elastic member 7 can be a spring.

[0033] The tip of the adjusting needle 8 passes through the end cover 5, the piston ring 6, and the guide sleeve 3 in sequence and finally inserts into the inner hole of the nozzle 2. The inner hole of the nozzle 2 is tapered. The depth of the tip of the adjusting needle 8 entering the inner hole of the nozzle 2 determines the amount of gas passing through the inner hole of the nozzle 2 per unit time. The end of the adjusting needle 8 exposed to the end cover 5 is threadedly connected with a positioning nut 9, and the adjusting needle 8 body is provided with a positioning component for positioning the piston ring 6;

[0034] The pressure-inducing pipe 10, whose two ends are respectively connected to the delivery chamber 102 and the piston chamber 103 of the injection pipe 1, introduces the pressurized gas in the delivery chamber 102 into the piston chamber 103 to push the piston ring 6 to compress the elastic member 7 and drive the adjustment needle 8 to move. The pressure-inducing pipe 10 is provided with a filter 15, which can filter the gas introduced from the delivery chamber 102 to prevent material dust from entering the piston chamber 103.

[0035] By means of the pressure-inducing pipe 10, pressurized gas is introduced from the delivery chamber 102 of the injection pipe 1 into the piston chamber 103 to push the piston ring 6 to compress the elastic member 7 and drive the adjustment needle 8 to move. At this time, the tip of the adjustment needle 8 is away from the inner hole of the nozzle 2, and the space of the inner hole of the nozzle 2 becomes larger. At this time, the gas output of the inner hole of the nozzle 2 becomes larger, and the force of the airflow can be increased without increasing the airflow velocity, thereby increasing the thrust of the injector. In addition, not increasing the airflow velocity means not increasing energy consumption.

[0036] In this embodiment, sealing rings 11 are provided on the outer periphery and inner hole of the piston ring 6 and the inner hole of the guide sleeve 3. The sealing ring 11 on the outer periphery of the piston ring 6 forms a seal with the inner wall of the piston chamber 103. The sealing rings 11 on the inner hole of the piston ring 6 and the inner hole of the guide sleeve 3 both form a seal with the outer wall of the adjusting needle 8. At this time, the pressure gas introduced into the piston chamber 103 by the pressure-inducing pipe 10 will not leak.

[0037] In this embodiment, the positioning assembly includes a positioning convex ring 13 and a retaining spring 14 which are arranged on the adjusting needle 8 body and are respectively located on the two sides of the piston ring 6, wherein the retaining spring 14 is engaged in a groove arranged on the adjusting needle 8 body, and the piston ring 6 is fixed on the adjusting needle 8 by the action of the positioning convex ring 13 and the retaining spring 14. In this application, only one structural form of the positioning assembly is disclosed, but it is not limited to other forms of structures.

[0038] In this embodiment, the air intake pipe 4 is connected to the compressed air through an air pipe, and the air pipe is connected to a filter pressure regulating valve 16. By setting the filter pressure regulating valve 16, the compressed air can be filtered and pressure-regulated.

[0039] The above-described implementation modes of the present invention do not constitute a limitation on the protection scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. An ejector, comprising an ejection pipe (1), wherein the ejection pipe (1) is provided with a material receiving chamber (100), a mixing chamber (101), and a conveying chamber (102) which are connected in sequence, wherein: The delivery chamber (102) is located at one end of the injection pipe (1), and is characterized in that it also includes: A nozzle (2) is arranged inside the injection pipe (1), and a gas injection outlet thereof is communicated with the material receiving chamber (100); A guide sleeve (3) is arranged inside the injection pipe (1) and adjacent to the gas inlet of the nozzle (2); an air intake pipe (4) located on the injection pipe (1) body is arranged between the guide sleeve (3) and the nozzle (2); An end cover (5) is threadedly connected to the other end of the injection pipe (1); a gap between the end cover (5) and the guide sleeve (3) forms a piston chamber (103); a piston ring (6) and an elastic member (7) are provided inside the piston chamber (103); two ends of the elastic member (7) are elastically abutted against the piston ring (6) and the end cover (5) respectively; The tip of the adjusting needle (8) passes through the end cover (5), the piston ring (6) and the guide sleeve (3) in sequence and is finally inserted into the inner hole of the nozzle (2). The end of the adjusting needle (8) exposed outside the end cover (5) is threadedly connected with a positioning nut (9). The adjusting needle (8) body is provided with a positioning assembly for positioning the piston ring (6). The two ends of the pressure-inducing tube (10) are respectively connected to the delivery chamber (102) and the piston chamber (103) of the injection tube (1), and the pressure-inducing tube (100) introduces the pressure gas in the delivery chamber (102) into the piston chamber (103) to push the piston ring (6) to compress the elastic member (7) and drive the adjustment needle (8) to move.

2. The injector according to claim 1, characterized in that The outer periphery, inner hole and inner hole of the piston ring (6) and the inner hole of the guide sleeve (3) are all provided with sealing rings (11); the sealing ring (11) on the outer periphery of the piston ring (6) forms a seal with the inner wall of the piston cavity (103); the sealing rings (11) on the inner hole of the piston ring (6) and the inner hole of the guide sleeve (3) both form a seal with the outer wall of the adjusting needle (8).

3. The injector according to claim 1, characterized in that The inner hole of the nozzle (2) is conical, and the depth at which the tip of the adjusting needle (8) enters the inner hole of the nozzle (2) determines the amount of gas that passes through the inner hole of the nozzle (2) per unit time.

4. The injector according to claim 1, characterized in that The injection pipe (1) is provided with an injection pipe (12) which is in communication with the material receiving chamber (100).

5. The injector according to claim 1, characterized in that The mixing chamber (101) and the conveying chamber (102) are transitionally connected by a diffusion chamber (104).

6. The injector according to claim 1, characterized in that The positioning assembly comprises a positioning convex ring (13) and a retaining spring (14) which are arranged on the adjusting needle (8) body and are respectively located on the two side surfaces of the piston ring (6), wherein the retaining spring (14) is engaged in a groove arranged on the adjusting needle (8) body.

7. The injector according to claim 1, characterized in that The pressure-guiding pipe (10) is provided with a filter (15).

8. The injector according to claim 1, characterized in that The material receiving chamber (100) and the mixing chamber (101) are connected by a tapered transition.

9. The injector according to claim 1, characterized in that The air inlet pipe (4) is connected to the compressed air through an air pipe, and the air pipe is connected to a filter pressure regulating valve (16).

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