An adjustable injector

Abstract

The application discloses a novel adjustable ejector, relates to the technical field of ejectors, and comprises a rotating rod, an actuator connecting part, an adjusting rod, a nozzle, a primary flow inlet, a secondary flow inlet, a packing gland, a packing body, a packing gasket, a block structure and an O-shaped ring. One end of the nozzle is connected with one end of the actuator, the other end of the actuator is provided with the rotating rod, the inside of the one end of the actuator is provided with the packing gasket, one side of the packing gasket is provided with the packing body, the other end of the packing body is provided with the packing gland, the sealing mode and the structure of the adjusting probe are optimized, a block structure is added to the adjusting rod, the surface sealing between the block structure and the fluid channel is used to replace the line sealing between the adjusting device and the throat or the throat wall surface in the previous structure in the process of adjusting the flow of the ejector, and the O-shaped ring is added at the sealing surface, so that the sealing contact area is larger and the sealing is more reliable.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ejector technology, in particular to an adjustable ejector. BACKGROUND

[0002] The ejector has good energy-saving effect, simple structure, low cost and other advantages, and has no strict restriction on the pumped medium, and is widely used in waste steam recovery, seawater desalination, water conservancy, chemical industry, petroleum and aviation fields, especially in heat pump evaporation system and steam jet refrigeration system. Whether it is a heat pump evaporation system or a jet refrigeration system and a jet-compression refrigeration system, the ejector is an important part of them, and its performance is critical to the whole system. The main body of the steam jet heat pump evaporation system is composed of an evaporator and an ejector. The low-pressure secondary steam generated in the evaporator is pressurized by the ejector and enters the evaporator as heating steam, and is finally condensed and discharged. This technology can effectively utilize the waste heat of the secondary steam generated in the evaporation process, thereby achieving energy-saving effect, and therefore has considerable energy-saving benefit in the evaporation industry.

[0003] In industry, many production fields cannot do without the use of steam, such as chemical industry, petroleum, seawater desalination, thermal power generation, etc. In the process of using steam, a large amount of low-pressure steam with low enthalpy and low pressure will inevitably be generated, and the recovery of which will have large investment and poor economic efficiency. In the past, the low-pressure steam was directly discharged, which not only wasted energy, but also indirectly polluted the environment. Energy saving and environmental protection are the inevitable choice for building a resource-saving and environment-friendly society. By using a steam ejector, the low-pressure steam can be pumped by high-pressure steam, and the pressurized steam can be further utilized, thereby recovering energy and reducing waste.

[0004] The traditional ejector has many advantages, but also has some shortcomings. At present, the ejectors applied in industry are mostly designed with fixed structure, which can only maintain high performance under fixed design operating conditions. If the operating conditions deviate from the initial design parameters, the ejector performance will rapidly decrease, and even lose the working ability. In industrial production, due to the leakage and blockage of boilers and steam pipelines and many other uncontrollable factors, the steam pressure will inevitably fluctuate, and the performance of the traditional ejector will deteriorate seriously under pressure fluctuation. In order to enable the ejector to maintain high-efficiency and stable operation under fluctuating operating conditions, adjustable ejectors have been deeply researched. The principle is to change the equivalent diameter of the nozzle throat and outlet by adjusting the linearity of the needle in the nozzle, so as to change the important structural parameter affecting the performance of the ejector, i.e. the area ratio, thereby realizing the adjustment of the performance of the ejector.

[0005] However, currently, the sealing at the nozzle throat of adjustable injectors relies primarily on line contact between the adjusting pin and the throat wall, which is unreliable. Furthermore, the structure of the adjusting probe is not ideal; the change in area ratio with the movement of the adjusting rod is not linear, resulting in insufficient adjustment accuracy and hindering industrial applications. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides an adjustable injector that solves the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an adjustable injector, comprising a rotating rod, an actuator connection portion, an adjusting rod, a nozzle, a primary flow inlet, a secondary flow inlet, a packing gland, a packing body, a packing gasket, a block structure, and an O-ring seal. One end of the nozzle is connected to one end of the actuator, and the other end of the actuator is provided with a rotating rod. A packing gasket is provided inside one end of the actuator, and a packing body is provided on one side of the packing gasket. A packing gland is provided at the other end of the packing body. An adjusting rod is inserted inside the packing body, and one end of the adjusting rod is located inside one end of the rotating rod. The other end of the adjusting rod is provided with a block structure, which is located inside the nozzle. An O-ring seal is provided between the block structure and the inner wall of the nozzle, and the O-ring seal is embedded in the surface of the block structure. The O-ring seal is tightly fitted to one end of the inner cavity of the nozzle. A primary flow inlet is installed at the top of the nozzle, and a secondary flow inlet is installed at the bottom of the nozzle. The primary flow inlet and the secondary flow inlet communicate with the interior of the nozzle.

[0008] Preferably, one end of the nozzle has a hollow structure, and a circular groove is formed inside the nozzle, which extends through one end of the nozzle. The inside of the nozzle is connected to the outside through the circular groove, and there is a gap between the inner wall of the circular groove and the outer wall of the adjusting rod.

[0009] Preferably, one end of the adjusting rod has a T-shaped cross-section, and one end of the adjusting rod is tightly fitted with one end of the rotating rod. The adjusting rod and the rotating rod are internally rotatably connected. The other end of the adjusting rod has a conical shape, and there is a gap between the conical structure of the adjusting rod and the inner wall of the nozzle.

[0010] Preferably, a mixing chamber is provided on the outside of one end of the nozzle, and both the mixing chamber and one end of the nozzle are provided with flanges. The interior of the mixing chamber is hollow, and the two ends of the mixing chamber are interconnected. The two ends of the mixing chamber are funnel-shaped.

[0011] Preferably, the outer wall of the actuator has a barrel-shaped structure, the inner surface of the actuator is smooth, and the interior of the actuator has a hollow structure.

[0012] Preferably, one end of the rotating rod has a groove on its open surface, and one end of the groove is open. The inner wall of the groove has a smooth surface, and the groove has a T-shaped cross-section. The other end of the rotating rod is fitted with a square block-shaped structure.

[0013] Preferably, the outer wall of the rotating rod is rotatably connected to the inner wall of one end of the nozzle, the outer wall of the rotating rod is tightly fitted to the nozzle, and the outer wall of the rotating rod is provided with a protruding structure, which matches the interior of one end of the nozzle.

[0014] Preferably, one end of the inner wall of the nozzle is open, and the inner wall of the nozzle is provided with a groove-like structure. The groove-like structure of the inner wall of the nozzle is rotatably connected to one end of the actuator.

[0015] Preferably, the outer wall of the packing gland is threaded, the packing gland is rotatably connected to the inner wall of the actuator, one end of the packing gland is tightly fitted to the packing body, the packing body is fitted onto the outside of the adjusting rod, and the outer wall of the adjusting rod is tightly fitted to the packing body.

[0016] This invention provides an adjustable injector. It has the following beneficial effects:

[0017] This adjustable injector optimizes the sealing method and the structure of the adjusting probe through the combination of various components. A block-shaped structure is added to the adjusting rod. During injector flow regulation, the surface seal between the block-shaped structure and the fluid channel replaces the line seal between the adjusting device and the throat or throat wall in previous structures. An O-ring is added to the sealing surface, increasing the sealing contact area and making the seal more reliable. The designed adjusting probe linearly changes the ratio of the mixing chamber area to the nozzle throat area (AR1) and the ratio of the nozzle outlet area to the nozzle throat area (AR2) as the probe moves equidistantly, allowing it to be adjusted to the appropriate position to meet the requirements of actual operating conditions. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the rotating rod structure of the present invention;

[0021] Figure 4 This is a schematic diagram of the nozzle structure of the present invention;

[0022] Figure 5 This is a schematic diagram of the actuator structure of the present invention;

[0023] Figure 6This is a schematic cross-sectional view of the execution structure of the present invention;

[0024] Figure 7 This is a schematic diagram of the adjusting rod structure of the present invention;

[0025] Figure 8 This is a schematic diagram of the cross-sectional structure of the adjusting rod of the present invention.

[0026] In the diagram, 1 is the rotating rod; 2 is the actuator; 3 is the adjusting rod; 4 is the nozzle; 5 is the primary flow inlet; 6 is the secondary flow inlet; 7 is the packing gland; 8 is the packing body; 9 is the packing gasket; 10 is the block structure; 11 is the O-ring seal; and 12 is the mixing chamber. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0028] Please see Figures 1-8This invention provides a technical solution: an adjustable injector, comprising a rotating rod 1, an actuator connecting part 2, an adjusting rod 3, a nozzle 4, a primary flow inlet 5, a secondary flow inlet 6, a packing gland 7, a packing body 8, a packing gasket 9, a block structure 10, and an O-ring 11. One end of the nozzle 4 is connected to one end of the actuator 2, and the other end of the actuator 2 is provided with the rotating rod 1. A packing gasket 9 is provided inside one end of the actuator 2, and a packing body 8 is provided on one side of the packing gasket 9. A packing gland 7 is provided at the other end of the packing body 8. An adjusting rod 3 is inserted inside the packing body 8, with one end of the adjusting rod 3 located inside one end of the rotating rod 1. The other end of the adjusting rod 3 is provided with the block structure 10, which is located inside the nozzle 4. An O-ring 11 is provided between the block structure 10 and the inner wall of the nozzle 4. The O-ring 11 is embedded in the surface of the block structure 10 and is tightly fitted to one end of the internal cavity of the nozzle 4. The nozzle 4 has a primary flow inlet 5 at the top and a secondary flow inlet 6 at the bottom. The primary flow inlet 5 and the secondary flow inlet 6 are connected to the inside of the nozzle 4. When the probe enters a narrow channel, the structure of the probe changes the effective area of ​​the fluid passing through the pipe, thereby changing the ratio of the area of ​​the mixing chamber 12 to the area of ​​the nozzle throat (AR1) and the ratio of the area of ​​the nozzle outlet to the area of ​​the nozzle throat (AR2), so as to achieve the effect of regulating the working conditions. The optimal position can be achieved by moving the adjusting rod 3 to achieve the best performance of the ejector. The block structure 10 is in contact with the wall of the fluid pipe to form a surface contact, and the O-ring 11 is placed in the middle to achieve the sealing effect.

[0029] The nozzle 4 has a hollow structure at one end, and a circular slot is opened inside the nozzle 4, which extends through one end of the nozzle 4. The nozzle 4 is connected to the outside through the circular slot, and there is a gap between the inner wall of the circular slot and the outer wall of the adjusting rod 3.

[0030] One end of the adjusting rod 3 has a T-shaped cross-section and is tightly fitted to one end of the rotating rod 1. The adjusting rod 3 and the rotating rod 1 are internally rotatably connected. The other end of the adjusting rod 3 has a conical shape. There is a gap between the conical structure at one end of the adjusting rod 3 and the inner wall of the nozzle 4. When the conical probe enters a narrower fluid channel, the structure of the conical probe will change the effective area of ​​the fluid passing through the pipe, thereby changing the ratio of the area of ​​the mixing chamber 12 to the area of ​​the nozzle throat (AR1) and the ratio of the outlet area of ​​the nozzle 4 to the area of ​​the nozzle throat (AR2), thus achieving the effect of regulating the working conditions.

[0031] The nozzle 4 has a mixing chamber 12 on one side. Both the mixing chamber 12 and the nozzle 4 have flanges. The mixing chamber 12 has a hollow structure inside and the two ends of the mixing chamber 12 are interconnected. The two ends of the mixing chamber 12 have a trumpet-shaped structure. The flanges facilitate the sealing connection between the mixing chamber 12 and the nozzle 4 by bolts.

[0032] The outer wall of the actuator 2 is barrel-shaped, and the inner surface of the actuator 2 is smooth. The interior of the actuator 2 is hollow.

[0033] The rotating rod 1 has a groove on one end of its open surface, and the groove is open at one end. The inner wall of the groove has a smooth surface. The groove has a T-shaped cross-section. The other end of the rotating rod 1 is fitted with a square block-shaped structure.

[0034] The outer wall of the rotating rod 1 is rotatably connected to the inner wall of one end of the nozzle 4. The outer wall of the rotating rod 1 and the nozzle 4 are tightly fitted together. The outer wall of the rotating rod 1 is provided with a protruding structure, and the protruding structure of the outer wall of the rotating rod 1 matches the inside of one end of the nozzle 4.

[0035] One end of the inner wall of the nozzle 4 is open, and the inner wall of the nozzle 4 is provided with a groove-shaped structure. The groove-shaped structure on the inner wall of the nozzle 4 is rotatably connected to one end of the actuator 2.

[0036] The outer wall of the packing gland 7 is threaded. The packing gland 7 is rotatably connected to the inner wall of the actuator 2. One end of the packing gland 7 is tightly fitted to the packing body 8. The packing body 8 is fitted onto the outside of the adjusting rod 3. The outer wall of the adjusting rod 3 is tightly fitted to the packing body 8. By rotating the packing gland 7, the packing gland 7 can squeeze the packing body 8, which in turn helps the packing body 8 to squeeze the adjusting rod 3, thereby maintaining a seal.

[0037] Working principle: When the probe enters a narrower fluid channel, its structure alters the effective area of ​​the fluid as it passes through the pipe, thereby changing the ratio of the mixing chamber 12 area to the nozzle throat area (AR1) and the ratio of the nozzle 4 outlet area to the nozzle throat area (AR2). This achieves the effect of regulating the operating conditions. The optimal position can be achieved by moving the adjusting rod 3 to ensure the injector reaches its best performance. When it is necessary to cut off the primary flow, the adjusting rod 3 is moved forward axially, causing the block structure 10 to contact the wall of the fluid pipe, forming a surface contact. An O-ring seal 11 is placed in the middle to achieve a sealing effect.

[0038] The components of this invention are: 1. Rotating rod; 2. Actuating mechanism; 3. Adjusting rod; 4. Nozzle; 5. Primary flow inlet; 6. Secondary flow inlet; 7. Packing gland; 8. Packing body; 9. Packing gasket; 10. Block structure; 11. O-ring seal; 12. Mixing chamber. All components are general standard parts or parts known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0040] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An adjustable injector, characterized in that: The device includes a rotating rod (1), an actuator connection part (2), an adjusting rod (3), a nozzle (4), a primary flow inlet (5), a secondary flow inlet (6), a packing gland (7), a packing body (8), a packing gasket (9), a block structure (10), and an O-ring seal (11). One end of the nozzle (4) is connected to one end of the actuator (2), and the other end of the actuator (2) is provided with a rotating rod (1). One end of the actuator (2) is provided with a packing gasket (9), one side of the packing gasket (9) is provided with a packing body (8), and the other end of the packing body (8) is provided with a packing gland (7). The adjusting rod (3) is inserted inside the packing body (8). One end of the adjusting rod (3) is located inside one end of the rotating rod (1), and the other end of the adjusting rod (3) is provided with a block structure (10). The block structure (10) is located inside the nozzle (4). An O-ring (11) is provided between the block structure (10) and the inner wall of the nozzle (4). The O-ring (11) is embedded in the surface of the block structure (10). The O-ring (11) is tightly fitted to one end of the inner cavity of the nozzle (4). A primary flow inlet (5) is installed at the top of the nozzle (4), and a secondary flow inlet (6) is installed at the bottom of the nozzle (4). The primary flow inlet (5) and the secondary flow inlet (6) are connected to the inside of the nozzle (4). A mixing chamber (12) is provided on the outside of one end of the nozzle (4). The adjusting rod (3) is internally rotatably connected to one end of the rotating rod (1), and the other end of the adjusting rod (3) has a conical structure. There is a gap between the conical structure at one end of the adjusting rod (3) and the inner wall of the nozzle (4). When the regulating rod enters the narrower channel of the nozzle, the structure of the regulating rod will change the effective area of ​​the fluid passing through the narrower channel, thereby changing the ratio of the area of ​​the mixing chamber (12) to the area of ​​the nozzle throat and the ratio of the area of ​​the nozzle (4) outlet to the area of ​​the nozzle throat. As the regulating rod moves at equal intervals, the ratio of the area of ​​the mixing chamber to the area of ​​the nozzle throat and the ratio of the area of ​​the nozzle outlet to the area of ​​the nozzle throat change linearly.

2. An adjustable injector according to claim 1, characterized in that: The nozzle (4) has a hollow structure at one end. A circular slot is opened inside the nozzle (4) and the circular slot passes through one end of the nozzle (4). The nozzle (4) is connected to the outside through the circular slot, and there is a gap between the inner wall of the circular slot and the outer wall of the adjusting rod (3).

3. An adjustable injector according to claim 1, characterized in that: The adjusting rod (3) has a T-shaped cross-section at one end, and the adjusting rod (3) is in close contact with the rotating rod (1) at one end.

4. An adjustable injector according to claim 1, characterized in that: Both the mixing chamber (12) and the nozzle (4) have flange edges at one end. The mixing chamber (12) has a hollow structure inside and the two ends of the mixing chamber (12) are interconnected. The two ends of the mixing chamber (12) have a trumpet-shaped structure.

5. An adjustable injector according to claim 1, characterized in that: The outer wall of the actuator (2) is barrel-shaped, and the inner surface of the actuator (2) is smooth. The interior of the actuator (2) is hollow.

6. An adjustable injector according to claim 1, characterized in that: The rotating rod (1) has a groove on one end of its open surface, and the groove is open at one end. The inner wall of the groove is smooth. The groove has a T-shaped cross-section. The other end of the rotating rod (1) is fitted with a square block-shaped structure.

7. An adjustable injector according to claim 1, characterized in that: The inner wall of the nozzle (4) is open at one end, and the inner wall of the nozzle (4) is provided with a groove structure at one end. The groove structure of the inner wall of the nozzle (4) is rotatably connected to one end of the actuator (2).

8. An adjustable injector according to claim 1, characterized in that: The outer wall of the packing gland (7) is threaded. The packing gland (7) is rotatably connected to the inner wall of the actuator (2). One end of the packing gland (7) is tightly fitted to the packing body (8). The packing body (8) is fitted onto the outside of the adjusting rod (3). The outer wall of the adjusting rod (3) is tightly fitted to the packing body (8).

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