A steam ejector

Abstract

The utility model discloses a steam ejector, including a nozzle, an injection pipe, and an integrally formed receiving chamber and a mixing chamber, wherein a steam ejection pipe is fixedly connected to the bottom of the receiving chamber, a clamp is fixedly connected to the side of the receiving chamber away from the mixing chamber, the outer wall of the injection pipe is fixedly connected to the clamp through a mounting ring, and the nozzle includes a straight pipe section, a bellows, and a nozzle head. In the present application, when the pressure of the high-pressure steam is relatively higher than the design pressure, the distance between the nozzle and the mixing chamber 4 is increased to a suitable distance by pulling the most port through the connecting frame, the bellows shrinks synchronously, and finally positioned by the positioning rod. By changing the position of the nozzle head, it is beneficial to improve the ejection coefficient under different working conditions, thereby producing a mixed steam pressure that meets the production requirements, and the adjustment process of the nozzle head is relatively convenient, and does not affect the stability of the injection pipe connection.

Description

Technical Field

[0001] The utility model relates to the technical field of steam ejectors, in particular to a steam ejector. Background Art

[0002] A steam ejector is a device that uses a high-pressure fluid to draw a low-pressure fluid to increase the pressure of the ejected fluid. It is widely used because of its simple and reliable structure and low operating costs. The existing steam ejector consists of four parts: a nozzle, an ejection chamber, a mixing chamber and a diffusion chamber.

[0003] Chinese patent publication number CN218030853U, publication time 20221213, discloses a steam ejector, including a nozzle, an injection pipe, a receiving chamber and a mixing chamber, the injection pipe is connected to the inlet of the receiving chamber, a steam ejector is provided at the lower end of the receiving chamber and is connected thereto, the mixing chamber includes a tapered section, a mixing chamber throat and a diffuser section, the tapered section, the mixing chamber throat and the diffuser section are sequentially connected to form a whole, the receiving chamber outlet is connected to the tapered section, the nozzle includes a mounting section, a corrugated section and a nozzle port, the mounting section, the corrugated section and the nozzle port are sequentially connected, the mounting section is connected to the inlet of the receiving chamber, a mounting disk is provided on the outside of the injection pipe, a screw is provided on the mounting disk, the screw passes through the mounting disk and the receiving chamber and is movably connected to the nozzle port.

[0004] The existing steam ejectors such as the above-mentioned one are provided with a corrugated section in the middle of the nozzle. The tensioning screw can be used to drive the corrugated section to expand and contract back and forth, thereby adjusting the distance between the nozzle opening and the steam ejection tube, which is beneficial to improving the ejection coefficient under different working conditions, thereby producing a mixed steam pressure that meets the production requirements. In the specific implementation process, the screw not only connects the nozzle opening and the injection tube, but also fixes the injection tube and the receiving chamber, so that when adjusting the horizontal position of the nozzle opening, not only is it necessary to operate multiple sets of screws in a time-consuming manner, but it can also cause the injection tube to loosen. Therefore, it is urgent to propose a corresponding steam ejector to solve the above-mentioned problems. Utility Model Content

[0005] The purpose of the utility model is to provide a steam ejector in order to solve the above problems.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A steam ejector comprises a nozzle, an injection pipe, and an integrally formed receiving chamber and mixing chamber, wherein a steam injection pipe is fixedly connected to the bottom of the receiving chamber, a clamping plate is fixedly connected to the side of the receiving chamber away from the mixing chamber, an outer wall of the injection pipe is fixedly connected to the clamping plate via a mounting ring, the nozzle comprises a straight pipe section, a bellows and a nozzle head, the outer wall of the straight pipe section is screwed together with an inner wall of the injection pipe, and an adjustment component for adjusting the horizontal position of the nozzle head is provided between the outer wall of the nozzle head and the mounting ring.

[0008] Preferably, a strap is fixedly connected to the outer wall of the plywood, and the strap is fixedly connected to the receiving chamber via a mounting rod.

[0009] Preferably, a convex ring is fixedly connected to the outer wall of the straight pipe section, and the outer wall of the convex ring overlaps the outer wall of the plywood.

[0010] Preferably, the mixing chamber comprises a tapered section, a throat and a diffuser section.

[0011] Preferably, the adjustment assembly includes a fixed sleeve and a connecting frame with an L-shaped structure, the fixed sleeve is fixedly connected to the mounting ring, the bottom of the vertical end of the connecting frame is fixedly connected to the outer wall of the nozzle, the outer wall of the connecting frame passes through the clamping plate, the mounting ring and the inner wall of the fixed sleeve, the top inner wall of the fixed sleeve is screwed and connected with a positioning rod, and the open end of the positioning rod abuts against the outer wall of the connecting frame.

[0012] Preferably, the mounting ring is fixedly connected to the outer wall of the incident tube, the mounting ring is fixedly connected to the clamping plate via at least one set of locking rods, and at least one set of locking rods is staggered with the fixing sleeve.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0014] 1. In the present application, when the pressure of the high-pressure steam is relatively lower than the design pressure, the nozzle head is pushed by the connecting frame, so that the distance between the nozzle head and the entrance of the mixing chamber is reduced, and the bellows expands synchronously until the nozzle head reaches the specified position, and then the positioning rod is rotated to make it screwed with the inner surface wall of the fixed sleeve. The friction generated between the open end of the positioning rod and the connecting frame realizes the positioning of the connecting frame, which is beneficial to prevent the phenomenon of low-pressure steam backflow. Similarly, when the pressure of the high-pressure steam is relatively higher than the design pressure, the connection frame pulls the mouth to increase the distance between it and the mixing chamber 4 to an appropriate distance, and the bellows contracts synchronously. Finally, it is positioned by the positioning rod. By changing the position of the nozzle head, it is beneficial to improve the injection coefficient under different working conditions, thereby producing a mixed steam pressure that meets the production requirements. The adjustment process of the nozzle head is relatively convenient and does not affect the stability of the injection pipe connection.

[0015] 2. In the present application, the mounting ring is fixed on the plywood, and the plywood is fixed to the receiving chamber by the cooperation of the strap and the mounting rod, thereby ensuring the stability of the connection between the nozzle, the incident tube and the receiving chamber, while improving the convenience of subsequent nozzle maintenance and disassembly and assembly between the nozzle, the incident tube and the receiving chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The overall structure schematic diagram provided according to the embodiment of the utility model is shown;

[0017] Figure 2 A schematic diagram of the structure of a mixing chamber provided according to an embodiment of the utility model is shown;

[0018] Figure 3 A schematic diagram of the structure of a connecting frame provided according to an embodiment of the utility model is shown;

[0019] Figure 4 A schematic diagram of the nozzle structure provided according to an embodiment of the utility model is shown.

[0020] Legend:

[0021] 1. Nozzle; 101. Straight pipe section; 102. Bellows; 103. Nozzle head; 2. Entrance pipe; 3. Receiving chamber; 4. Mixing chamber; 401. Gradually contracting section; 402. Throat; 403. Diffuser section; 5. Steam ejector; 6. Clamp; 7. Lap; 8. Mounting ring; 9. Connecting frame; 10. Mounting rod; 11. Convex ring; 12. Locking rod; 13. Fixing sleeve; 14. Positioning rod. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only 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.

[0023] See also Figure 1-4 , the utility model provides a technical solution:

[0024] A steam ejector comprises a nozzle 1, an injection pipe 2, and an integrally formed receiving chamber 3 and a mixing chamber 4. A steam ejection pipe 5 is fixedly connected to the bottom of the receiving chamber 3. A clamping plate 6 is fixedly connected to the side of the receiving chamber 3 away from the mixing chamber 4. The outer wall of the injection pipe 2 is fixedly connected to the clamping plate 6 through a mounting ring 8. The nozzle 1 comprises a straight pipe section 101, a bellows 102, and a nozzle head 103. The outer wall of the straight pipe section 101 is screwed to the inner wall of the injection pipe 2, and an adjusting component for adjusting the horizontal position of the nozzle head 103 is arranged between the outer wall of the nozzle head 103 and the mounting ring 8.

[0025] When the pressure of the high-pressure steam is relatively lower than the design pressure, the nozzle head 103 is pushed by the connecting frame 9, so that the distance between the nozzle head 103 and the entrance of the mixing chamber 4 is reduced, and the bellows 102 expands synchronously. After the nozzle head 103 reaches the specified position, the positioning rod 14 is rotated to make it screwed with the inner surface wall of the fixed sleeve 13. The friction force generated between the open end of the positioning rod 14 and the connecting frame 9 realizes the positioning of the connecting frame 9, which is beneficial to prevent the low-pressure steam from flowing back. Similarly, when the pressure of the high-pressure steam is relatively higher than the design pressure, the nozzle head 103 is pulled by the connecting frame 9 to increase the distance between it and the mixing chamber 4 to an appropriate distance, and the bellows 102 contracts synchronously and is finally positioned by the positioning rod 14. The change in the position of the nozzle head 103 is beneficial to improve the entrainment coefficient under different working conditions, thereby producing a mixed steam pressure that meets the production requirements. The adjustment process of the nozzle head 103 is relatively convenient and does not affect the stability of the connection of the injection pipe 2.

[0026] It should be noted that the working mechanism of the steam ejector is the prior art, specifically, high-temperature and high-pressure working steam enters the nozzle 1 from the injection pipe 2, flows through the nozzle 1 for adiabatic expansion, and forms a supersonic flow and a vacuum zone at the outlet of the nozzle 1, and the ejected steam enters the receiving chamber 3 from the steam ejector pipe 5, and is entrained and carried into the mixing chamber 4 under the action of the entrainment pressure difference and the high-speed working fluid, and the two fluids form a mixed fluid with the supersonic working fluid as the center and the low-speed ejected fluid as the periphery at the converging section 401 of the mixing chamber 4. The two fluids collide, rub and mix with each other, thereby exchanging mass, energy and momentum, so that the speed of the working fluid is continuously reduced, and the speed of the ejected fluid is continuously increased. After entering the expansion section 403 through the throat 402, the pressure increases and the flow rate decreases, and the steam is discharged after reaching the required parameters for discharge.

[0027] Specifically, Figure 2 and Figure 4 As shown, a strap 7 is fixedly connected to the outer wall of the clamping plate 6, and the strap 7 is fixedly connected to the receiving chamber 3 through a mounting rod 10. The mounting ring 8 is fixed on the clamping plate 6, and the clamping plate 6 is fixed to the receiving chamber 3 through the cooperation of the strap 7 and the mounting rod 10, thereby ensuring the stability of the connection between the nozzle 1, the incident tube 2 and the receiving chamber 3, while improving the convenience of subsequent maintenance of the nozzle 1 and disassembly and assembly between the nozzle 1, the incident tube 2 and the receiving chamber 3.

[0028] Specifically, Figure 2 and Figure 3As shown, the outer wall of the straight pipe section 101 is fixedly connected with a convex ring 11, and the outer wall of the convex ring 11 overlaps the outer wall of the closing plate 6 to avoid excessive rotation of the injection pipe 2 and the straight pipe section 101. The mixing chamber 4 includes a tapered section 401, a throat 402 and a diffuser section 403. The two fluids form a mixed fluid with a supersonic working fluid as the center and a low-speed injection fluid surrounding the outer periphery at the tapered section entrance 401 of the mixing chamber 4. The two fluids collide, rub and mix with each other, thereby exchanging mass, energy and momentum, so that the speed of the working fluid is continuously reduced, and the speed of the ejected fluid is continuously increased. After entering the diffuser section 403 through the throat 402, the pressure increases and the flow rate decreases. The regulating component includes a fixed sleeve 13 and a connecting frame 9 with an L-shaped structure. The fixed sleeve 13 is fixedly connected to the mounting ring 8. The bottom of the vertical end of the connecting frame 9 is fixedly connected to the outer wall of the nozzle head 103. The outer wall of the connecting frame 9 passes through the plywood 6, the mounting ring 8 and the inner wall of the fixed sleeve 13. The inner wall at the top of the fixed sleeve 13 is screwed and connected with a positioning rod 14. The open end of the positioning rod 14 abuts against the connecting The outer wall of the connecting frame 9 pushes the nozzle 103 through the connecting frame 9, so that the distance between the nozzle 103 and the entrance of the mixing chamber 4 is reduced, and the bellows 102 expands synchronously until the nozzle 103 reaches the specified position, and then the positioning rod 14 is rotated to make it screwed with the inner wall of the fixed sleeve 13. The friction force generated between the open end of the positioning rod 14 and the connecting frame 9 realizes the positioning of the connecting frame 9, and the mounting ring 8 is fixedly connected to the outer wall of the incident tube 2. The mounting ring 8 is fixedly connected to the clamping plate 6 through at least one set of locking rods 12, and at least one set of locking rods 12 is staggered with the fixed sleeve 13, so as to ensure that the connection between the connecting frame 9 and the incident tube 2 does not affect each other.

[0029] Working principle: When the pressure of high-pressure steam is relatively lower than the design pressure, the nozzle head 103 is pushed by the connecting frame 9, so that the distance between the nozzle head 103 and the entrance of the mixing chamber 4 is reduced, and the bellows 102 expands synchronously until the nozzle head 103 reaches the specified position, and then the positioning rod 14 is rotated to make it screwed with the inner surface wall of the fixed sleeve 13. The friction force generated between the open end of the positioning rod 14 and the connecting frame 9 realizes the positioning of the connecting frame 9, which is beneficial to prevent the phenomenon of low-pressure steam backflow. Similarly, when the pressure of high-pressure steam is relatively higher than the design pressure, the nozzle head 103 is pulled by the connecting frame 9 to increase the distance between it and the mixing chamber 4 to a suitable distance, and the bellows 102 expands synchronously until the nozzle head 103 reaches the specified position. The corrugated tube 102 contracts synchronously, and is finally positioned by the positioning rod 14. The change in the position of the nozzle head 103 is beneficial to improving the injection coefficient under different working conditions, thereby producing a mixed steam pressure that meets the production requirements. The adjustment process of the nozzle head 103 is relatively convenient, and it does not affect the stability of the connection of the injection tube 2. The mounting ring 8 is fixed on the clamping plate 6, and the clamping plate 6 is fixed to the receiving chamber 3 through the cooperation of the strap 7 and the mounting rod 10, thereby ensuring the stability of the connection between the nozzle 1, the injection tube 2 and the receiving chamber 3, while improving the convenience of subsequent nozzle 1 maintenance and disassembly and assembly between the nozzle 1, the injection tube 2 and the receiving chamber 3.

[0030] The above description of the embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A steam ejector, comprising a nozzle (1), an injection pipe (2), and an integrally formed receiving chamber (3) and a mixing chamber (4), characterized in that: The bottom of the receiving chamber (3) is fixedly connected to a steam ejector pipe (5); a side of the receiving chamber (3) away from the mixing chamber (4) is fixedly connected to a clamping plate (6); the outer wall of the injection pipe (2) is fixedly connected to the clamping plate (6) via a mounting ring (8); the nozzle (1) comprises a straight pipe section (101), a bellows (102) and a nozzle head (103); the outer wall of the straight pipe section (101) is screwed together with the inner wall of the injection pipe (2); and an adjustment component for adjusting the horizontal position of the nozzle head (103) is provided between the outer wall of the nozzle head (103) and the mounting ring (8).

2. A steam ejector according to claim 1, characterized in that: The outer wall of the plywood (6) is fixedly connected with a strap (7), and the strap (7) is fixedly connected to the receiving chamber (3) via a mounting rod (10).

3. A steam ejector according to claim 2, characterized in that: The outer wall of the straight pipe section (101) is fixedly connected with a convex ring (11), and the outer wall of the convex ring (11) overlaps with the outer wall of the plywood (6).

4. A steam ejector according to claim 3, characterized in that: The mixing chamber (4) comprises a tapered section (401), a throat (402) and a diffuser section (403).

5. A steam ejector according to claim 4, characterized in that: The adjustment assembly comprises a fixed sleeve (13) and a connecting frame (9) with an L-shaped structure, the fixed sleeve (13) is fixedly connected to the mounting ring (8), the bottom of the vertical end of the connecting frame (9) is fixedly connected to the outer wall of the nozzle head (103), the outer wall of the connecting frame (9) passes through the plywood (6), the mounting ring (8) and the inner wall of the fixed sleeve (13), the inner wall at the top of the fixed sleeve (13) is screwed and connected with a positioning rod (14), and the open end of the positioning rod (14) abuts against the outer wall of the connecting frame (9).

6. A steam ejector according to claim 5, characterized in that: The mounting ring (8) is fixedly connected to the outer wall of the incident tube (2), the mounting ring (8) is fixedly connected to the clamping plate (6) via at least one set of locking rods (12), and at least one set of locking rods (12) and the fixing sleeve (13) are staggered.

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