Ejector with adjustable nozzle and throat pipe

Abstract

The utility model provides an ejector with an adjustable nozzle and an adjustable throat pipe. The ejector comprises a pipe body, and the nozzle and the throat pipe are arranged at the two ends of the pipe body respectively. A nozzle cavity is formed in the nozzle, and the cross section of the nozzle cavity is rectangular; a nozzle cavity sliding block corresponding to the nozzle cavity in shape is arranged in the nozzle cavity, so that the nozzle cavity sliding block can slide in the nozzle cavity in the radial direction of the pipe body; a nozzle adjusting cavity corresponding to the nozzle cavity sliding block is formed in the side face of the nozzle cavity. A mixing cavity is formed in the throat pipe, and the cross section of the mixing cavity is rectangular; a mixing cavity sliding block corresponding to the mixing cavity in shape is arranged in the mixing cavity, so that the mixing cavity sliding block can slide in the mixing cavity in the radial direction of the pipe body; a mixing adjusting cavity corresponding to the mixing cavity sliding block is formed in the side face of the mixing cavity. The load of the ejector can be continuously adjusted from 0% to 100%, the applicability of the ejector is greatly enhanced, and the application scene of the ejector is effectively expanded.

Description

Technical Field

[0001] The utility model relates to an ejector, in particular to an ejector with an adjustable nozzle and a throat. Background Art

[0002] An ejector is a purely mechanical device that uses a high-pressure fluid to boost a low-pressure fluid to a medium-pressure fluid. It has the characteristics of simple structure, high efficiency, and a wide range of applications, and is therefore widely used. The ejection coefficient of an ejector is the main indicator for measuring an ejector, and the ejection coefficient is equal to the flow area ratio of the nozzle to the throat. The nozzles and throats of traditional ejectors are fixed and cannot be adjusted, which means that the ejector can only be adjusted within the rated operating conditions. If the flow or pressure of the power fluid or the ejection fluid changes, the ejection coefficient of the ejector will drop sharply; when there are restrictions on any of the power fluid, the ejection fluid, or the mixed fluid, the system will not work properly.

[0003] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Utility Model Content

[0004] The purpose of the utility model is to provide an injector with an adjustable nozzle and throat, so that the injector can achieve continuous adjustable load from 0-100%, greatly enhancing the applicability of the injector and effectively expanding the application scenarios of the injector.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An ejector with adjustable nozzle and throat, comprising a tube body, with a nozzle and a throat respectively disposed at both ends of the tube body, a power fluid inlet disposed at the end of the nozzle, a mixed fluid outlet disposed at the end of the throat, and an ejection fluid inlet disposed on the side of the tube body between the nozzle and the throat;

[0007] A nozzle cavity is provided in the nozzle, and the cross section of the nozzle cavity is rectangular; a nozzle cavity slider corresponding to the shape of the nozzle cavity is provided in the nozzle cavity, so that the nozzle cavity slider can slide in the nozzle cavity along the radial direction of the tube body; a nozzle adjustment cavity corresponding to the nozzle cavity slider is provided on the side of the nozzle cavity;

[0008] A mixing chamber is provided in the throat, and the cross-section of the mixing chamber is rectangular; a mixing chamber slider corresponding to the shape of the mixing chamber is provided in the mixing chamber, so that the mixing chamber slider can slide in the mixing chamber along the radial direction of the tube body; a mixing adjustment chamber corresponding to the mixing chamber slider is provided on the side of the mixing chamber.

[0009] According to one embodiment of the utility model, a first operating rod is provided on the side of the nozzle chamber slider, and a second operating rod is provided on the side of the mixing chamber slider. The first operating rod and the second operating rod both pass through the side wall of the tube body, and the ends are located outside the tube body.

[0010] According to one embodiment of the utility model, the direction from the power fluid inlet to the mixed fluid outlet is a first direction; the nozzle chamber includes a first section, a second section, a third section and a fourth section connected in sequence along the first direction, the height of the first section is greater than the height of the third section, the height of the second section gradually decreases along the first direction; the height of the fourth section gradually increases along the first direction.

[0011] According to one embodiment of the utility model, the mixing chamber includes a fifth section, a sixth section, a seventh section and an eighth section connected in sequence along the first direction; the height of the sixth section is less than the height of the eighth section, the height of the fifth section gradually decreases along the first direction, and the height of the seventh section gradually increases along the first direction.

[0012] According to an embodiment of the present utility model, a synchronous operating rod is provided between the first operating rod and the second operating rod.

[0013] According to an embodiment of the present utility model, the first operating rod and the second operating rod are connected to a driving device.

[0014] According to one embodiment of the utility model, the driving device is an electric push-pull rod, a hydraulic rod or a cylinder.

[0015] Compared with the prior art, the advantages and beneficial effects of the utility model are:

[0016] The utility model provides an injector with adjustable nozzle and throat, which enables the injector to achieve continuous load adjustment from 0-100%, greatly enhancing the applicability of the injector and effectively expanding the application scenarios of the injector. In addition, the utility model can make the injector always operate under the optimal injection coefficient working condition, reduce the consumption of power fluid to a limited extent, and minimize the energy consumption of the injector. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. Among them:

[0018] Figure 1 A cross-sectional view of an injector with adjustable nozzle and throat provided by the utility model;

[0019] Figure 2A cross-sectional view of another angle of the injector with adjustable nozzle and throat provided by the utility model;

[0020] Figure 3 The utility model provides a schematic structural diagram of the pipe body of an injector with an adjustable nozzle and a throat. DETAILED DESCRIPTION

[0021] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present invention and does not limit the present invention. In fact, it will be clear to those skilled in the art that modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as a part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desired that the present invention includes such modifications and variations within the scope of the appended claims and their equivalents.

[0022] In the description of the present invention, "first", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprising" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, but do not exclude other elements or objects. The directions or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. The terms "connected", "connected" and "set" used in the present invention should be understood in a broad sense, for example, they can be fixedly connected or detachably connected; they can be directly connected or indirectly connected through an intermediate component; they can be wired electrical connections, radio connections, or wireless communication signal connections. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0023] like Figure 1 , Figure 2 As shown, the utility model provides an ejector with adjustable nozzle and throat, comprising a tube body 1, with a nozzle 2 and a throat 3 at both ends of the tube body 1 respectively, a power fluid inlet 11 at the end of the nozzle 2, a mixed fluid outlet 12 at the end of the throat 3, and an ejection fluid inlet 13 at the side of the tube body 1 between the nozzle 2 and the throat 3.

[0024] like Figure 2 , Figure 3As shown, the nozzle 2 is provided with a nozzle cavity 21, and the cross section of the nozzle cavity 21 is rectangular. A nozzle cavity slider 22 corresponding to the shape of the nozzle cavity 21 is provided in the nozzle cavity 21, so that the nozzle cavity slider 22 can slide in the nozzle cavity 21 along the radial direction of the tube body 1. A nozzle adjustment cavity 23 corresponding to the nozzle cavity slider 22 is provided on the side of the nozzle cavity 21. During the sliding process, the nozzle cavity slider 22 can slide into the nozzle adjustment cavity 23, and the flow area of ​​the nozzle cavity 21 can be changed by sliding into the depth of the nozzle adjustment cavity 23.

[0025] A mixing chamber 31 is provided in the throat 3, and the cross section of the mixing chamber 31 is rectangular. A mixing chamber slider 32 corresponding to the shape of the mixing chamber 31 is provided in the mixing chamber 31, so that the mixing chamber slider 32 can slide in the mixing chamber 31 along the radial direction of the tube body 1. A mixing adjustment chamber 33 corresponding to the mixing chamber slider 32 is provided on the side of the mixing chamber 31, and the mixing chamber slider 32 can slide into the mixing adjustment chamber 33 during the sliding process, and the flow area of ​​the mixing chamber 31 can be changed by sliding into the mixing adjustment chamber 33.

[0026] When the utility model is used, the power fluid enters the nozzle cavity 21 from the power fluid inlet 11, the ejection fluid enters the tube body 1 from the ejection fluid inlet 13, the power fluid and the ejection fluid are mixed and enter the mixing cavity 31, and finally ejected from the mixed fluid outlet 12. The utility model sets a nozzle cavity slider 22 in the nozzle cavity 21 so that it can slide into the nozzle adjustment cavity 23, thereby adjusting the flow area of ​​the nozzle cavity 21, and sets a mixing cavity slider 32 in the mixing cavity 31 so that it can slide into the mixing adjustment cavity 33, thereby adjusting the flow area of ​​the mixing cavity 31, so that the ejector can achieve continuous load adjustment from 0-100%, greatly enhancing the applicability of the ejector and effectively expanding the application scenarios of the ejector. When the working conditions change, the nozzle cavity slider 22 and the mixing cavity slider 32 can be adjusted proportionally at the same time, so that the flow cross-sectional areas of the nozzle 2 and the throat 3 change proportionally, so as to achieve the effect that the ejector structure size adapts to the change of the operating load; at the same time, it is ensured that the ejection coefficient of the ejector is always the optimal ejection coefficient and remains unchanged.

[0027] like Figure 2 As shown, for the convenience of operation, a first operating rod 24 is provided on the side of the nozzle chamber slider 22, and a second operating rod 34 is provided on the side of the mixing chamber slider 31. The first operating rod 24 and the second operating rod 34 both pass through the side wall of the tube body 1, and the ends are located outside the tube body 1. The first operating rod 24 and the second operating rod 34 can apply force to the nozzle chamber slider 22 and the mixing chamber slider 32 to make them move in the nozzle chamber 21 and the mixing chamber 31.

[0028] The first operating rod 24 and the second operating rod 34 can be separated or connected as one. When the pressure of the three fluids (power fluid, ejection fluid, and mixed fluid) of the ejector remains unchanged and only the flow rate changes, a synchronous operating rod (not shown in the figure) is provided between the first operating rod 24 and the second operating rod 34 to connect them as one and move synchronously to ensure that the strokes of the nozzle chamber slider 22 and the mixing chamber slider 32 are consistent. The characteristic curves of the nozzle 2 and the throat 3 must be designed according to the consistent strokes. When the pressure of more than one of the three fluids (power fluid, ejection fluid, and mixed fluid) of the ejector changes, the first operating rod 24 and the second operating rod 34 are controlled separately, that is, they are independent of each other.

[0029] In order to facilitate accurate control of displacement, the first operating rod 24 and the second operating rod 34 are connected to a driving device (not shown in the figure), and the driving device can be an electric push-pull rod, a hydraulic rod or a cylinder.

[0030] Furthermore, if Figure 3 As shown, the direction from the power fluid inlet 11 to the mixed fluid outlet 12 is the first direction, and the nozzle chamber 21 includes a first section 211, a second section 212, a third section 213 and a fourth section 214 connected in sequence along the first direction. The height of the first section 211 is greater than the height of the third section 213, and the height of the second section 212 gradually decreases along the first direction. The height of the fourth section 214 gradually increases along the first direction. The mixing chamber 31 includes a fifth section 311, a sixth section 312, a seventh section 313 and an eighth section 314 connected in sequence along the first direction. The height of the sixth section 312 is less than the height of the eighth section 314, the height of the fifth section 311 gradually decreases along the first direction, and the height of the seventh section 313 gradually increases along the first direction.

[0031] The utility model provides an injector with adjustable nozzle and throat, which enables the injector to achieve continuous load adjustment from 0-100%, greatly enhancing the applicability of the injector and effectively expanding the application scenarios of the injector. In addition, the utility model can make the injector always operate under the optimal injection coefficient working condition, reduce the consumption of power fluid to a limited extent, and minimize the energy consumption of the injector.

[0032] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An ejector with adjustable nozzle and throat, characterized in that: It comprises a tube body, wherein two ends of the tube body are respectively provided with a nozzle and a throat, a power fluid inlet is provided at the end of the nozzle, a mixed fluid outlet is provided at the end of the throat, and an ejection fluid inlet is provided on the side of the tube body between the nozzle and the throat; A nozzle cavity is provided in the nozzle, and the cross section of the nozzle cavity is rectangular; a nozzle cavity slider corresponding to the shape of the nozzle cavity is provided in the nozzle cavity, so that the nozzle cavity slider can slide in the nozzle cavity along the radial direction of the tube body; a nozzle adjustment cavity corresponding to the nozzle cavity slider is provided on the side of the nozzle cavity; A mixing chamber is provided in the throat, and the cross-section of the mixing chamber is rectangular; a mixing chamber slider corresponding to the shape of the mixing chamber is provided in the mixing chamber, so that the mixing chamber slider can slide in the mixing chamber along the radial direction of the tube body; a mixing adjustment chamber corresponding to the mixing chamber slider is provided on the side of the mixing chamber.

2. The injector with adjustable nozzle and throat according to claim 1, characterized in that: A first operating rod is disposed on the side of the nozzle chamber slider, and a second operating rod is disposed on the side of the mixing chamber slider. Both the first operating rod and the second operating rod pass through the side wall of the tube body, and the ends thereof are located outside the tube body.

3. The injector with adjustable nozzle and throat according to claim 1 or 2, characterized in that: The direction from the power fluid inlet to the mixed fluid outlet is a first direction; the nozzle chamber includes a first section, a second section, a third section and a fourth section connected in sequence along the first direction, the height of the first section is greater than the height of the third section, the height of the second section gradually decreases along the first direction; the height of the fourth section gradually increases along the first direction.

4. The injector with adjustable nozzle and throat according to claim 3, characterized in that: The mixing chamber includes a fifth section, a sixth section, a seventh section and an eighth section connected in sequence along the first direction; the height of the sixth section is smaller than the height of the eighth section, the height of the fifth section gradually decreases along the first direction, and the height of the seventh section gradually increases along the first direction.

5. The injector with adjustable nozzle and throat according to claim 2, characterized in that: A synchronous operating rod is arranged between the first operating rod and the second operating rod.

6. The injector with adjustable nozzle and throat according to claim 2, characterized in that: The first operating rod and the second operating rod are connected to a driving device.

7. The injector with adjustable nozzle and throat according to claim 6, characterized in that: The driving device is an electric push-pull rod, a hydraulic rod or a cylinder.

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