An adjustable steam ejector

Abstract

This invention provides an adjustable steam ejector, relating to the field of steam injection device technology, comprising: an ejector chamber, a mixing chamber, a nozzle tube, a diffuser tube, an adjustment mechanism, and a drive mechanism; the drive mechanism is fixedly mounted on the right side of the ejector chamber, a power steam chamber is fixedly mounted on the top of the ejector chamber, the nozzle tube is fixedly connected to the right end of the ejector chamber along the left-right direction, the mixing chamber is fixedly mounted to the right end of the nozzle tube, and the diffuser tube is fixedly mounted to the right end of the mixing chamber; the ejector chamber, nozzle tube, mixing chamber, and diffuser tube are sequentially and axially connected from left to right; an adjustment mechanism along the left-right direction is slidably mounted inside the ejector chamber, nozzle tube, mixing chamber, and diffuser tube, and the drive mechanism is fixedly connected to the left end of the adjustment mechanism; this invention ensures smooth steam flow and achieves rapid and accurate adjustment of steam flow rate by sequentially connecting the nozzle, power steam chamber, ejector chamber, mixing chamber, and diffuser tube along the axial direction.

Description

Technical Field

[0001] This invention relates to the field of steam injection device technology, and more particularly to an adjustable steam injector. Background Technology

[0002] Steam ejectors, as fluid machinery and mixing reaction devices that utilize jet turbulence and diffusion for mass and energy transfer, are widely used in industrial production. Traditional steam ejectors mainly consist of a nozzle, throat, diffuser, and suction chamber. High-pressure gas is ejected at high speed from the nozzle, entraining low-pressure gas around the nozzle. The two gas streams mix and are pressurized in the mixing chamber and diffuser, thereby increasing the pressure of the low-pressure gas entering the ejector from the suction port. However, traditional steam ejectors have several problems in practical applications, such as low efficiency, high power steam consumption, and ejection performance greatly affected by changes in external steam parameters.

[0003] Especially in industrial production, changes in external steam parameters, particularly significant variations in exhaust steam flow, cause drastic changes in the ejector's entrainment performance, making it impossible to achieve the ejector's designed optimal entrainment performance, i.e., minimum power steam consumption. Therefore, there is an urgent need for a new type of steam ejector that can maintain optimal entrainment performance under different operating conditions, reduce power steam consumption, and improve energy efficiency. Summary of the Invention

[0004] The present invention provides an adjustable steam ejector to solve at least one of the technical problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides an adjustable steam ejector, comprising: an ejector chamber, a mixing chamber, a nozzle tube, a diffuser tube, an adjustment mechanism, and a drive mechanism; the drive mechanism is fixedly provided on the right side of the ejector chamber, a power steam chamber is fixedly provided on the top of the ejector chamber, the nozzle tube is fixedly connected to the right end of the ejector chamber in the left-right direction, the mixing chamber is fixedly provided on the right end of the nozzle tube, and the diffuser tube is fixedly provided on the right end of the mixing chamber; the ejector chamber, nozzle tube, mixing chamber, and diffuser tube are fixedly connected axially from left to right; the adjustment mechanism in the left-right direction is slidably provided in the ejector chamber, nozzle tube, mixing chamber, and diffuser tube, and the drive mechanism is fixedly connected to the left end of the adjustment mechanism.

[0006] Preferably, the right end of the power steam chamber is fixedly connected to a steam input pipe, the output end of the steam input pipe is fixedly connected to the top of the ejector cavity, and a solenoid valve is fixedly installed on the steam input pipe; the power steam chamber and the steam input pipe are sealed by a first sealing ring, and the upper and lower walls of the ejector cavity are symmetrically provided with first sliding grooves in the left and right directions.

[0007] Preferably, the circular throat inside the nozzle tube is on the same axis as the outlet of the ejector cavity, the right end of the nozzle tube is inserted transversely into the mixing cavity, the bottom end of the mixing cavity is fixedly connected to the air input pipe, the air inlet end of the air input pipe is fixedly installed with a blower, and a second solenoid valve is fixedly installed on the air input pipe.

[0008] Preferably, the right end of the mixing chamber is fixedly connected to a first diffuser tube in the left-right direction. A pair of second sliding grooves in the left-right direction are provided on the front and rear side walls of the first diffuser tube. A second diffuser tube is installed on the right end of the first diffuser tube by bolts. A pair of third sliding grooves in the left-right direction are provided on the front and rear side walls of the second diffuser tube. A rubber connecting tube is fixedly installed at the connection between the first diffuser tube and the second diffuser tube. The right end of the second diffuser tube is fixedly connected to a circular tube three. A third switching mechanism is fixedly provided inside the circular tube three.

[0009] Preferably, the adjustment mechanism includes: a first adjustment cone, a second adjustment cone, and a third adjustment cone. The second adjustment cone is slidably connected to the second sliding groove. The left wall of the ejector cavity is rotatably connected to an axial bidirectional lead screw. The axes of the first adjustment cone and the second adjustment cone are respectively threaded to the opposite threaded sections of the bidirectional lead screw. The third adjustment cone is slidably provided to the third sliding groove. A second sealing ring is fixedly connected to each of the first adjustment cone, the second adjustment cone, and the third adjustment cone.

[0010] Preferably, the right end of the third adjusting cone is fixedly connected to the first driving transmission mechanism. The first driving transmission mechanism includes: an L-shaped push rod, the bottom right end of which is fixedly connected to an internal threaded sleeve; a pair of mounting bearings spaced apart on the left and right sides are fixedly installed on the bottom wall of the second diffuser tube; a sliding screw is rotatably connected between the left and right mounting bearings; the sliding screw is threadedly connected to the internal threaded sleeve; a bevel gear one is fixedly connected to the right end of the sliding screw; bevel gear one meshes with bevel gear two; the shaft of bevel gear two is fixedly connected to the output shaft end of the adjusting motor; and the adjusting motor is fixedly connected to the bottom outer wall of the second diffuser tube.

[0011] Preferably, the drive mechanism includes: a rectangular frame, a rectangular frame fixedly installed on the left side of the ejector cavity, a vertical drive motor fixedly installed on the top of the rectangular frame, a worm gear fixedly connected to the output shaft end of the drive motor, a transmission shaft rotatably connected to the center of the rectangular frame, a bidirectional lead screw fixedly connected to the right end of the transmission shaft, a worm wheel fixedly connected to the center of the transmission shaft, the worm wheel meshing with the worm gear, and an adjustment handle fixedly connected to the left end of the transmission shaft.

[0012] Preferably, the third switching mechanism includes: a housing, a top of the three circular tubes fixedly connected to the housing, a crossbar fixedly connected to the middle of the housing, a servo motor fixedly connected to the center of the crossbar, a cam fixedly connected to the front end of the output shaft of the servo motor, a baffle plate pressed against the bottom of the cam, a vertical rod fixedly connected to the bottom of the baffle, the vertical rod sliding up and down through the top wall of the three circular tubes, a spring provided on the upper section of the vertical rod, a perforated plate fixedly connected to the bottom of the vertical rod, and a perforated plate two fixedly provided inside the three circular tubes to the left of the perforated plate one.

[0013] Preferably, the intelligent detection and adjustment system includes:

[0014] The first temperature detection module is used to detect the temperature of the steam entering the mixing chamber from the power steam chamber in real time.

[0015] The second temperature detection module is used to detect the temperature value of the inner wall of the ejection chamber in real time.

[0016] The steam detection module is used to detect the partial pressure of water vapor inside the steam ejector;

[0017] The first calculation module is used to calculate the water vapor diffusion coefficient in the mixing chamber of the steam ejector.

[0018] The comparison and judgment unit is used to compare and judge the occurrence of abnormalities in the water vapor diffusion coefficient in the mixing chamber of the steam ejector;

[0019] The steam delivery unit is used to pressurize and deliver steam into the inlet chamber, which is achieved by a pressurizing fan.

[0020] An alarm is used to alert in abnormal situations.

[0021] The control system is electrically connected to the first temperature detection module, the second temperature detection module, the alarm, and the steam detection module.

[0022] Preferably, the first calculation module includes:

[0023] Where: D S The diffusion coefficient of water vapor in the mixing chamber of the steam ejector during the detection period; M is the gas molar mass of water vapor in the steam ejector; k l τ is the correction coefficient for water vapor flow friction resistance, with a value of 1.1; τ is the diameter of the water vapor liquefying into small droplets in the mixing chamber; P1 is the water vapor partial pressure detected by the steam detection module at the inlet of the mixing chamber far from the air input pipe; P2 is the water vapor partial pressure detected by the steam detection module at the inlet of the ejector chamber entering the mixing chamber; R is the universal gas constant. m is the inertial correction factor for water vapor flow. t T is the coefficient of mass change of liquefied droplets per unit time. cT0 represents the steam temperature in the mixing chamber at the end of the detection period, and Tm represents the steam temperature in the mixing chamber at the beginning of the detection period. max T represents the maximum operating temperature of the mixing chamber inner wall detected by the temperature detection module. min The lowest operating temperature of the mixing chamber inner wall detected by the temperature detection module; ln is the natural logarithm, π is pi (3.14), l is the flow resistance error adjustment coefficient (0.2), N is the total number of detection points, G j The steam detection module detects the partial pressure fluctuation coefficient at the j-th detection point.

[0024] The comparison and judgment unit compares the water vapor diffusion coefficient in the mixing chamber of the steam ejector during the detection period calculated by the first calculation module with its threshold. When the water vapor diffusion coefficient is greater than the threshold, the control system controls the steam delivery unit to reduce the output power of the pressurizing fan, thereby reducing the flow rate of steam entering the ejector chamber and thus reducing the rate at which waste heat of flue gas is converted into water vapor heat energy. When the water vapor diffusion coefficient is less than the threshold, the control system controls the steam delivery unit to increase the output power of the pressurizing fan. If the water vapor diffusion coefficient is still not within the threshold after one adjustment, the alarm will sound an abnormal alarm.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: When the adjustable steam ejector provided by the present invention is in operation, motive steam enters the ejector chamber through the motive steam chamber, generating a high-speed steam flow. The drive mechanism dynamically adjusts the flow channels in the nozzle tube, mixing chamber, and diffuser tube through an adjustment mechanism. Specifically, the first drive transmission mechanism of the drive mechanism slides within the ejector chamber, nozzle tube, mixing chamber, and diffuser tube, thereby changing the flow cross-section or shape inside these components, and thus adjusting the flow rate, pressure, and flow volume of the steam flow. The adjusted steam flow mixes with the ejector fluid (such as low-pressure steam or water) in the mixing chamber to form a uniform mixed fluid. Subsequently, the mixed fluid is diffused through the diffuser tube to increase the pressure and output the steam.

[0026] Beneficial effects:

[0027] 1. Flexible adjustment: Through the cooperation of the drive mechanism and the adjustment mechanism, the internal flow channel of the steam ejector can be dynamically adjusted, thereby flexibly adjusting the parameters of the steam flow, such as flow rate, pressure and flow rate, according to actual needs, which improves the adaptability and flexibility of the steam ejector.

[0028] 2. Improved Energy Efficiency: By precisely adjusting the parameters of the steam flow, the operating state of the steam ejector can be optimized, reducing energy loss and improving energy efficiency. Furthermore, dynamic adjustment ensures that the steam ejector maintains high operating efficiency under various conditions.

[0029] 3. Easy to maintain: The design of the adjustment and drive mechanisms makes the internal structure of the steam ejector relatively simple, facilitating maintenance and repair. Furthermore, the dynamic adjustment function reduces performance degradation caused by flow channel blockage or wear, extending the service life of the steam ejector.

[0030] 4. Wide range of applications: Due to its advantages such as flexible adjustment and high energy efficiency, the adjustable steam ejector provided in this embodiment of the invention can be widely used in various occasions that require steam injection, such as steam turbines, steam compressors, steam heaters, etc., and has broad market prospects and application value. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is a front cross-sectional view of the steam ejector of the present invention;

[0033] Figure 2 yes Figure 1 Enlarged view of a portion of point A in the middle;

[0034] Figure 3 yes Figure 1 Enlarged view of a portion of point B in the middle;

[0035] Figure 4 yes Figure 1 Enlarged view of a portion of point C in the middle;

[0036] Figure 5 yes Figure 1 A magnified view of a portion of point D in the middle.

[0037] Figure label:

[0038] 1. Ejector cavity; 101. Power steam chamber; 102. First sliding groove; 2. Nozzle pipe; 21. Circular throat; 22. Mixing chamber; 221. Air input pipe; 222. Solenoid valve II; 223. Blower; 23. Diffuser body; 231. First diffuser; 2311. Second sliding groove; 232. Second diffuser; 2321. Third sliding groove; 233. Rubber connecting pipe; 234. Circular pipe III; 3. Adjusting mechanism; 31. First adjusting cone; 32. Second adjusting cone; 321. Second sealing ring; 33. Third adjusting cone; 34. First drive transmission mechanism; 341. L-shaped push rod; 342. Inner... 343. Threaded sleeve; 344. Mounting bearing; 345. Sliding lead screw; 346. Bevel gear one; 347. Bevel gear two; 348. Adjusting motor; 4. Drive mechanism; 41. Steam input pipe; 411. Solenoid valve one; 42. First sealing ring; 421. Rectangular frame; 422. Drive motor; 423. Worm gear; 424. Transmission shaft; 425. Bidirectional lead screw; 426. Worm wheel; 427. Adjusting handle; 5. Third switching mechanism; 51. Housing one; 52. Crossbar one; 53. Servo motor; 54. Cam; 55. Baffle; 56. Vertical rod one; 57. Spring one; 58. Perforated plate one; 59. Perforated plate two. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0040] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0041] Furthermore, in this invention, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the invention. They are merely used to distinguish components or operations described using the same technical terms and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions and features of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0042] The present invention provides the following embodiments.

[0043] Example 1

[0044] This invention provides an adjustable steam ejector, such as... Figure 1 As shown, it includes: an ejector chamber 1, a mixing chamber 22, a nozzle tube 2, a diffuser tube 23, an adjustment structure, and a drive mechanism 4; the drive mechanism 4 is fixedly installed on the right side of the ejector chamber 1, and a power steam chamber 101 is fixedly installed on the top of the ejector chamber 1. The nozzle tube 2, which runs in the left-right direction, is fixedly connected to the right end of the ejector chamber 1. The mixing chamber 22 is fixedly installed to the right end of the nozzle tube 2, and the diffuser tube 23 is fixedly installed to the right end of the mixing chamber 22. The ejector chamber 1, the nozzle tube 2, the mixing chamber 22, and the diffuser tube 23 are fixedly connected in the axial direction from left to right. An adjustment mechanism 3, which runs in the left-right direction, is slidably installed inside the ejector chamber 1, the nozzle tube 2, the mixing chamber 22, and the diffuser tube 23. The left end of the adjustment mechanism 3 is fixedly connected to the drive mechanism 4.

[0045] The working principle and beneficial effects of the above technical solution are as follows: Working principle: When the adjustable steam ejector provided by the present invention is working, the motive steam enters the ejector chamber 1 through the motive steam chamber 101, generating a high-speed steam flow. The drive mechanism 4 dynamically adjusts the flow channels in the nozzle pipe 2, mixing chamber 22, and diffuser body 23 through the adjustment mechanism 3. Specifically, the first drive transmission mechanism 34 of the drive mechanism 4 slides in the ejector chamber 1, nozzle pipe 2, mixing chamber 22, and diffuser body 23, thereby changing the flow cross section or shape inside these components, and thus adjusting the flow rate, pressure, and flow rate of the steam flow. The adjusted steam flow mixes with the ejector fluid (such as low-pressure steam or water) in the mixing chamber 22 to form a uniform mixed fluid. Subsequently, the mixed fluid is diffused through the diffuser body 23 to increase the pressure and output.

[0046] Beneficial effects:

[0047] 1. Flexible adjustment: Through the cooperation of the drive mechanism 4 and the adjustment mechanism 3, the internal flow channel of the steam ejector can be dynamically adjusted, thereby flexibly adjusting the parameters of the steam flow, such as flow rate, pressure and flow rate, according to actual needs, which improves the adaptability and flexibility of the steam ejector.

[0048] 2. Improved Energy Efficiency: By precisely adjusting the parameters of the steam flow, the operating state of the steam ejector can be optimized, reducing energy loss and improving energy efficiency. Furthermore, dynamic adjustment ensures that the steam ejector maintains high operating efficiency under various conditions.

[0049] 3. Easy to maintain: The design of the regulating mechanism 3 and the drive mechanism 4 makes the internal structure of the steam ejector relatively simple, facilitating maintenance and repair. Furthermore, the dynamic adjustment function reduces performance degradation caused by flow channel blockage or wear, extending the service life of the steam ejector.

[0050] 4. Wide range of applications: Due to its advantages such as flexible adjustment and high energy efficiency, the adjustable steam ejector provided in this embodiment of the invention can be widely used in various occasions that require steam injection, such as steam turbines, steam compressors, steam heaters, etc., and has broad market prospects and application value.

[0051] Example 2

[0052] Based on Example 1, such as Figure 1-Figure 4 As shown, the right end of the power steam chamber 101 is fixedly connected to the steam input pipe 41, and the output end of the steam input pipe 41 is fixedly connected to the top of the ejector cavity 1. A solenoid valve 411 is fixedly installed on the steam input pipe 41. The power steam chamber 101 and the steam input pipe 41 are sealed by a first sealing ring 42. The upper and lower walls of the ejector cavity 1 are symmetrically provided with first sliding grooves 102 in the left and right directions.

[0053] The circular throat 21 inside the nozzle tube 2 is on the same axis as the outlet of the ejector cavity 1. The right end of the nozzle tube 2 is inserted horizontally into the mixing cavity 22. The bottom end of the mixing cavity 22 is fixedly connected to the air input pipe 221. The air inlet end of the air input pipe 221 is fixedly installed with a blower 223. The solenoid valve 222 is fixedly installed on the air input pipe 221.

[0054] The right end of the mixing chamber 22 is fixedly connected to a first diffuser tube 231 along the left-right direction. A pair of second sliding grooves 2311 along the left-right direction are opened on the front and rear side walls of the first diffuser tube 231. The right end of the first diffuser tube 231 is bolted to a second diffuser tube 232. A pair of third sliding grooves 2321 along the left-right direction are opened on the front and rear side walls of the second diffuser tube 232. A rubber connecting tube 233 is fixedly installed at the connection between the first diffuser tube 231 and the second diffuser tube 232. The right end of the second diffuser tube 232 is fixedly connected to a circular tube 234. A third switching mechanism 5 is fixedly installed inside the circular tube 234.

[0055] The third switching mechanism 5 includes: a housing 51, the top of the circular tube 234 is fixedly connected to the housing 51, the middle of the housing 51 is fixedly connected to the crossbar 52, the center of the crossbar 52 is fixedly connected to the servo motor 53, the front end of the output shaft of the servo motor 53 is fixedly connected to the cam 54, the bottom of the cam 54 is pressed against the baffle 55, the bottom end of the baffle 55 is fixedly connected to the vertical rod 56, the vertical rod 56 slides up and down through the top wall of the circular tube 234, the upper section of the vertical rod 56 is fitted with a spring 57, the bottom end of the vertical rod 56 is fixedly connected to a perforated plate 58, and a perforated plate 59 is fixedly installed inside the circular tube 234 on the left side of the perforated plate 58.

[0056] The working principle and beneficial effects of the above technical solution are as follows:

[0057] Working principle:

[0058] Based on Example 1, Example 2 adds control mechanisms for the steam input pipe 41 and the air input pipe 221, as well as a further refined design for the mixing chamber 22 and the diffuser 23. Steam enters the power steam chamber 101 through the solenoid valve 411 on the steam input pipe 41, and then enters the ejector chamber 1. Simultaneously, air enters the mixing chamber 22 through the blower 223 and the solenoid valve 222 on the air input pipe 221. The design of the nozzle pipe 2 ensures effective mixing of the steam flow and the ejector fluid (such as air). The mixed fluid enters the first diffuser 231 and the second diffuser 232. The position of the perforated plate 58 is adjusted by the adjusting mechanism 3 (such as the cam 54 and baffle 55 mechanism driven by the servo motor 53 in the third switching mechanism 5), thereby further adjusting the pressure and flow rate of the mixed fluid.

[0059] When the third switching mechanism 5 is working, the servo motor 53 drives the cam 54 to rotate. The rotating cam 54 presses against the baffle 55 and the vertical rod 56 to slide up and down. The spring 57 provides the reset elastic force. When the vertical rod 56 slides up and down, it drives the perforated plate 58 to slide up and down. The vent holes on the perforated plate 58 and the perforated plate 59 reciprocate to connect, controlling the pressure and flow rate of the mixed fluid. The servo motor 53 can precisely control the area of ​​connection and misalignment of the vent holes on the perforated plate 58 and the perforated plate 59.

[0060] Beneficial effects:

[0061] Precise control: The input of steam and air can be precisely controlled by solenoid valve 411 and solenoid valve 222, thereby achieving precise adjustment of the parameters of the mixed fluid.

[0062] Enhanced mixing effect: The design of nozzle tube 2 and mixing chamber 22 optimizes the mixing effect of steam and ejector fluid, and improves the uniformity and stability of the mixed fluid.

[0063] Flexible adjustment: The design of the third switching mechanism 5 allows for flexible adjustment of the flow channel within the diffuser body 23, further improving the adaptability and flexibility of the steam ejector.

[0064] Improved energy efficiency: By precisely controlling the input and adjusting the flow path, the working state of the steam ejector can be optimized, reducing energy loss and improving energy efficiency.

[0065] Example 3

[0066] Based on Example 1, such as Figure 1-5 As shown, the adjustment mechanism 3 includes: a first adjustment cone 31, a second adjustment cone 32, and a third adjustment cone 33. The second adjustment cone 32 is slidably connected to the second sliding groove 2311. The left wall of the ejector cavity 1 is rotatably connected to an axial bidirectional lead screw 425. The axes of the first adjustment cone 31 and the second adjustment cone 32 are respectively threaded to the opposite threaded sections of the bidirectional lead screw 425. The third adjustment cone 33 is slidably provided to the third sliding groove 2321. A second sealing ring 321 is fixedly connected to each of the first adjustment cone 31, the second adjustment cone 32, and the third adjustment cone 33.

[0067] The right end of the third adjusting cone 33 is fixedly connected to the first driving transmission mechanism 34. The first driving transmission mechanism 34 includes: an L-shaped push rod 341, the bottom right end of the L-shaped push rod 341 is fixedly connected to an internal threaded sleeve 342, a pair of left and right spaced mounting bearings 343 are fixedly installed on the inner bottom wall of the second diffuser tube 232, a sliding screw 344 is rotatably connected between the left and right mounting bearings 343, the sliding screw 344 is threadedly connected to the internal threaded sleeve 342, the right end of the sliding screw 344 is fixedly connected to a first bevel gear 345, the first bevel gear 345 meshes with a second bevel gear 346, the shaft of the second bevel gear 346 is fixedly connected to the output shaft end of the adjusting motor 347, and the adjusting motor 347 is fixedly connected to the bottom outer wall of the second diffuser tube 232.

[0068] The drive mechanism 4 includes: a rectangular frame 421, which is fixedly installed on the left side of the ejector cavity 1; a vertical drive motor 422 is fixedly installed on the top of the rectangular frame 421; a worm gear 423 is fixedly connected to the output shaft end of the drive motor 422; a transmission shaft 424 is rotatably connected to the center of the rectangular frame 421; the right end of the transmission shaft 424 is fixedly connected to a bidirectional lead screw 425; a worm wheel 426 is fixedly connected to the center of the transmission shaft 424; the worm wheel 426 meshes with the worm gear 423; and an adjustment handle 427 is fixedly connected to the left end of the transmission shaft 424.

[0069] The working principle and beneficial effects of the above technical solution are as follows:

[0070] Working principle:

[0071] Based on Example 1, Example 3 describes in detail the specific structure and operation of the adjustment mechanism 3 and the drive mechanism 4. The adjustment mechanism 3 includes a first adjustment cone 31, a second adjustment cone 32, and a third adjustment cone 33, which slide within their respective sliding grooves driven by a bidirectional lead screw 425 and a sliding lead screw 344, thereby changing the cross-section or shape of the flow channel. The drive mechanism 4 includes a drive motor 422 and a worm gear 423 and a worm wheel 426 transmission mechanism, as well as a drive mechanism 4 for the adjustment motor 347 and the sliding lead screw 344. It can also be manually adjusted using the adjustment handle 427. Together, they achieve precise control of the adjustment mechanism 3.

[0072] When the first drive transmission mechanism 34 is working, the regulating motor 347 runs and drives the second bevel gear 346 to rotate. The meshing transmission of the second bevel gear 346 causes the first bevel gear 345 and the sliding screw 344 to rotate synchronously in the mounting bearing 343. The rotation of the sliding screw 344 causes the internal threaded sleeve 342 and the L-shaped push rod 341 to move synchronously and push the third regulating cone 33 to slide left and right in the second diffuser tube 232 for adjustment.

[0073] When the drive mechanism 4 is working, the drive motor 422 runs and drives the worm 423 to rotate. The rotation of the worm 423 causes the worm wheel 426, the transmission shaft 424 and the double-acting screw 425 to rotate synchronously through meshing transmission. The rotation of the double-acting screw 425 causes the first adjusting cone 31 and the second adjusting cone 32 on the left and right sides to slide in opposite directions for adjustment.

[0074] Beneficial effects:

[0075] Precise adjustment: Through the drive of the bidirectional lead screw 425 and the sliding lead screw 344, the adjustment mechanism 3 can be precisely controlled, thereby precisely adjusting the cross-section or shape of the flow channel to meet different working requirements.

[0076] Compact structure: The design of the regulating mechanism 3 and the driving mechanism 4 makes the internal structure of the steam ejector more compact and reduces the space occupied.

[0077] Easy to maintain: The design of the adjustment mechanism 3 and the drive mechanism 4 is relatively simple, making them easy to maintain and repair.

[0078] Improved energy efficiency: By precisely adjusting the flow channel, the working state of the steam ejector can be optimized, reducing energy loss and improving energy efficiency.

[0079] Example 4

[0080] Based on Example 1, an intelligent detection and adjustment system is further provided, including:

[0081] The first temperature detection module is used to detect the steam temperature value of the steam entering the mixing chamber 22 from the power steam chamber 101 in real time.

[0082] The second temperature detection module is used to detect the temperature value of the inner wall of the ejector cavity 1 in real time.

[0083] The steam detection module is used to detect the partial pressure of water vapor inside the steam ejector;

[0084] The first calculation module is used to calculate the water vapor diffusion coefficient in the mixing chamber 22 of the steam ejector.

[0085] The comparison and judgment unit is used to compare and judge the occurrence of abnormalities in the water vapor diffusion coefficient in the mixing chamber 22 of the steam ejector;

[0086] The steam delivery unit is used to pressurize and deliver steam into the inlet chamber, which is achieved by a pressurizing fan.

[0087] An alarm is used to alert in abnormal situations.

[0088] The control system is electrically connected to the first temperature detection module, the second temperature detection module, the alarm, and the steam detection module.

[0089] The first calculation module includes:

[0090] Where: D S The diffusion coefficient of water vapor in the mixing chamber 22 of the steam ejector is measured within a specific time period; M is the gas molar mass of water vapor in the steam ejector; k l τ is the correction coefficient for water vapor flow friction resistance, with a value of 1.1; τ is the diameter of the water vapor liquefying into small droplets in the mixing chamber 22; P1 is the water vapor partial pressure detected by the steam detection module at the inlet of the mixing chamber 22 far from the air input pipe; P2 is the water vapor partial pressure detected by the steam detection module at the inlet of the ejector chamber 1 entering the mixing chamber 22; R is the universal gas constant. m is the inertial correction factor for water vapor flow. t T is the coefficient of mass change of liquefied droplets per unit time. c T0 represents the steam temperature inside the mixing chamber 22 at the end of the detection period, and T0 represents the steam temperature inside the mixing chamber 22 at the beginning of the detection period. max The maximum operating temperature of the inner wall of the mixing chamber 22, detected by the temperature detection module, is T. min The lowest operating temperature of the inner wall of the mixing chamber 22 detected by the temperature detection module; ln is the natural logarithm, π is pi (3.14), l is the flow resistance error adjustment coefficient (0.2), N is the total number of detection points, G j The steam detection module detects the partial pressure fluctuation coefficient at the j-th detection point.

[0091] The comparison and judgment unit compares the water vapor diffusion coefficient in the mixing chamber 22 of the steam ejector within the detection time period calculated by the first calculation module with its threshold. When the water vapor diffusion coefficient is greater than its threshold, the control system controls the steam delivery unit to reduce the output power of the pressurizing fan, thereby reducing the flow rate of steam entering the ejector chamber 1 and thus reducing the rate at which waste heat of flue gas is converted into water vapor heat energy. When the water vapor diffusion coefficient is less than its threshold, the control system controls the steam delivery unit to increase the output power of the pressurizing fan. When the water vapor diffusion coefficient is still not within the threshold after one adjustment, the alarm will sound an abnormal alarm.

[0092] The working principle and beneficial effects of the above technical solution are as follows:

[0093] Working principle:

[0094] Based on Example 1, Example 4 adds an intelligent detection and adjustment system. This system uses multiple detection modules (such as a first temperature detection module, a second temperature detection module, and a steam detection module) to monitor the working status of the steam ejector in real time, and uses a first calculation module to calculate the water vapor diffusion coefficient in the mixing chamber 22. The comparison and judgment unit compares the calculated water vapor diffusion coefficient with its threshold value, and the control system controls the output power of the steam delivery unit based on the comparison result, thereby adjusting the flow rate of steam entering the ejector chamber 1 and the rate at which waste heat from the flue gas is converted into water vapor thermal energy.

[0095] Beneficial effects:

[0096] Intelligent control: The introduction of an intelligent detection and adjustment system makes the control of steam ejectors more intelligent and automated, improving work efficiency and accuracy.

[0097] Real-time monitoring: Real-time monitoring by multiple detection modules can promptly detect abnormalities in the operation of the steam ejector and avoid potential safety hazards.

[0098] Optimization and adjustment: By accurately calculating the water vapor diffusion coefficient and adjusting it according to its threshold, the working state of the steam ejector can be optimized, improving energy efficiency and stability.

[0099] Enhanced safety: Intelligent control can monitor the working status of the steam ejector in real time, promptly detect and handle abnormal situations, thus improving equipment safety.

[0100] 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 of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An adjustable steam ejector, characterized in that, include: The ejector cavity (1), mixing cavity (22), nozzle tube (2), diffuser tube (23), adjustment mechanism (3) and drive mechanism (4) are provided. The drive mechanism (4) is fixedly provided on the left side of the ejector cavity (1). The power steam chamber (101) is fixedly provided on the top of the ejector cavity (1). The nozzle tube (2) is fixedly connected to the right end of the ejector cavity (1) along the left and right direction. The mixing cavity (22) is fixedly provided on the right end of the nozzle tube (2). The diffuser tube (23) is fixedly provided on the right end of the mixing cavity (22). The ejector cavity (1), nozzle tube (2), mixing cavity (22) and diffuser tube (23) are fixedly connected to each other along the axial direction from left to right. The adjustment mechanism (3) along the left and right direction is slidably provided in the ejector cavity (1), nozzle tube (2), mixing cavity (22) and diffuser tube (23). The left end of the adjustment mechanism (3) is fixedly connected to the drive mechanism (4). The ejector cavity (1) has symmetrically arranged first sliding grooves (102) in the left and right directions on its upper and lower inner walls; The right end of the mixing chamber (22) is fixedly connected to a first diffuser tube (231) in the left-right direction. A pair of second sliding grooves (2311) in the left-right direction are provided on the front and rear side walls of the first diffuser tube (231). The right end of the first diffuser tube (231) is installed with a second diffuser tube (232) by bolts. A pair of third sliding grooves (2321) in the left-right direction are provided on the front and rear side walls of the second diffuser tube (232). The adjustment mechanism (3) includes: a first adjustment cone (31), a second adjustment cone (32) and a third adjustment cone (33). The second adjustment cone (32) is slidably connected to the second sliding groove (2311) and the left wall of the ejector cavity (1) is rotatably connected to an axial bidirectional lead screw (425). The axes of the first adjustment cone (31) and the second adjustment cone (32) are respectively threaded to the opposite threaded sections of the bidirectional lead screw (425). The third adjustment cone (33) is slidably provided to the third sliding groove (2321) and a second sealing ring (321) is fixedly connected to the first adjustment cone (31), the second adjustment cone (32) and the third adjustment cone (33).

2. An adjustable steam ejector according to claim 1, characterized in that, include: The right end of the power steam chamber (101) is fixedly connected to the steam input pipe (41), the output end of the steam input pipe (41) is fixedly connected to the top of the ejector cavity (1), and a solenoid valve (411) is fixedly installed on the steam input pipe (41); the power steam chamber (101) and the steam input pipe (41) are sealed by a first sealing ring (42).

3. An adjustable steam ejector according to claim 1, characterized in that, include: The circular throat (21) inside the nozzle tube (2) is on the same axis as the outlet of the ejector cavity (1). The right end of the nozzle tube (2) is inserted horizontally into the mixing cavity (22). The bottom end of the mixing cavity (22) is fixedly connected to the air input pipe (221). A blower (223) is fixedly installed at the air inlet end of the air input pipe (221). A solenoid valve (222) is fixedly installed on the air input pipe (221).

4. An adjustable steam ejector according to claim 1, characterized in that, A rubber connecting pipe (233) is fixedly installed at the connection between the first diffuser (231) and the second diffuser (232). The right end of the second diffuser (232) is fixedly connected to the third circular pipe (234). A third switching mechanism (5) is fixedly installed inside the third circular pipe (234).

5. An adjustable steam ejector according to claim 4, characterized in that, The right end of the third adjusting cone (33) is fixedly connected to the first driving transmission mechanism (34). The first driving transmission mechanism (34) includes: an L-shaped push rod (341), the bottom right end of the L-shaped push rod (341) is fixedly connected to an internal threaded sleeve (342), a pair of mounting bearings (343) spaced apart on the left and right sides are fixedly installed on the inner bottom wall of the second diffuser tube (232), a sliding screw (344) is rotatably connected between the left and right mounting bearings (343), the sliding screw (344) is threadedly connected to the internal threaded sleeve (342), the right end of the sliding screw (344) is fixedly connected to a bevel gear one (345), the bevel gear one (345) meshes with a bevel gear two (346), the shaft of the bevel gear two (346) is fixedly connected to the output shaft end of the adjusting motor (347), and the adjusting motor (347) is fixedly connected to the bottom outer wall of the second diffuser tube (232).

6. An adjustable steam ejector according to claim 5, characterized in that, The drive mechanism (4) includes: a rectangular frame (421), the rectangular frame (421) is fixedly installed on the left side of the ejector cavity (1), a vertical drive motor (422) is fixedly installed on the top of the rectangular frame (421), a worm gear (423) is fixedly connected to the output shaft end of the drive motor (422), a transmission shaft (424) is rotatably connected to the center of the rectangular frame (421), the right end of the transmission shaft (424) is fixedly connected to a two-way lead screw (425), a worm wheel (426) is fixedly connected to the center of the transmission shaft (424), the worm wheel (426) meshes with the worm gear (423), and an adjustment handle (427) is fixedly connected to the left end of the transmission shaft (424).

7. An adjustable steam ejector according to claim 4, characterized in that, The third switching mechanism (5) includes: a housing (51), the top of the three round tubes (234) is fixedly connected to the housing (51), the middle of the housing (51) is fixedly connected to the crossbar (52), the center of the crossbar (52) is fixedly connected to the servo motor (53), the front end of the output shaft of the servo motor (53) is fixedly connected to the cam (54), the bottom of the cam (54) is pressed against the baffle (55), the bottom end of the baffle (55) is fixedly connected to the vertical rod (56), the vertical rod (56) slides up and down through the top wall of the three round tubes (234), the upper section of the vertical rod (56) is fitted with a spring (57), the bottom end of the vertical rod (56) is fixedly connected to the perforated plate (58), and the two perforated plates (59) are fixedly installed inside the three round tubes (234) on the left side of the perforated plate (58).

8. An adjustable steam ejector according to claim 5, characterized in that, It also features an intelligent detection and adjustment system, which includes: The first temperature detection module is used to detect the steam temperature value of the steam entering the mixing chamber (22) from the power steam chamber (101) in real time; The second temperature detection module is used to detect the temperature value of the inner wall of the ejector cavity (1) in real time; The steam detection module is used to detect the partial pressure of water vapor inside the steam ejector. The first calculation module is used to calculate the water vapor diffusion coefficient in the mixing chamber (22) of the steam ejector; The comparison and judgment unit is used to compare and judge the occurrence of abnormalities in the water vapor diffusion coefficient in the mixing chamber (22) of the steam ejector; A steam conveying unit is used to pressurize and convey steam into the mixing chamber (22), which is achieved by a blower (223); An alarm is used to alert in abnormal situations. The control system is electrically connected to the first temperature detection module, the second temperature detection module, the alarm, and the steam detection module.

9. An adjustable steam ejector according to claim 8, characterized in that, The first calculation module includes: ;in: To detect the water vapor diffusion coefficient in the mixing chamber (22) of the steam ejector during the detection period; The molar mass of water vapor inside the steam ejector; This is the correction factor for the frictional resistance of water vapor flow, with a value of 1.1; The diameter of the water vapor liquefied into small droplets in the mixing chamber (22); The steam detection module detects the partial pressure of water vapor at the inlet of the mixing chamber (22) far from the air input pipe. The steam detection module detects the partial pressure of water vapor at the inlet of the injection chamber (1) into the mixing chamber (22); This is the universal gas constant; This is the correction factor for the inertia of water vapor flow. This is the coefficient of mass change of liquefied droplets per unit time. To detect the steam temperature value inside the mixing chamber (22) at the end of the detection period, To detect the steam temperature value inside the mixing chamber (22) at the initial moment of the detection period, The maximum operating temperature of the inner wall of the mixing chamber (22) is detected by the temperature detection module. The lowest operating temperature of the inner wall of the mixing cavity (22) detected by the temperature detection module; ln is the natural logarithm. Pi, with a value of 3.

14. This is the flow resistance error adjustment coefficient, with a value of 0.

2. The total number of detection points. The steam detection module detects the partial pressure fluctuation coefficient at the j-th detection point. The comparison judgment unit compares the water vapor diffusion coefficient in the mixing chamber (22) of the steam ejector within the detection time period calculated by the first calculation module with its threshold. When the water vapor diffusion coefficient is greater than its threshold, the control system controls the steam delivery unit to reduce the output power of the blower (223) to reduce the flow rate of steam entering the ejector chamber (1), thereby reducing the rate at which waste heat of flue gas is converted into water vapor heat energy. When the water vapor diffusion coefficient is less than its threshold, the control system controls the steam delivery unit to increase the output power of the blower (223). When the water vapor diffusion coefficient is still not within the threshold after one adjustment, the alarm will sound an abnormal alarm.

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