Adjustable steam ejector

Abstract

The invention provides an adjustable steam ejector, which relates to the technical field of steam ejection devices, and comprises an ejection cavity, a mixing cavity, a nozzle pipe, a diffuser pipe body, an adjusting mechanism and a driving mechanism, a driving mechanism is fixedly arranged on the right side of the injection cavity, a power steam chamber is fixedly arranged on the top of the injection cavity, the right end of the injection cavity fixedly communicates with a nozzle pipe in the left-right direction, a mixing cavity is fixedly arranged at the right end of the nozzle pipe, and a diffusion pipe body is fixedly arranged at the right end of the mixing cavity. The injection cavity, the nozzle pipe, the mixing cavity and the diffusion pipe are sequentially and fixedly communicated in the axial direction from left to right, an adjusting mechanism in the left-right direction is arranged in the injection cavity, the nozzle pipe, the mixing cavity and the diffusion pipe in a sliding mode, and the left end of the adjusting mechanism is fixedly connected with a driving mechanism. The nozzle, the power steam chamber, the injection cavity, the mixing cavity and the diffuser pipe body are sequentially connected in the axial direction, it is ensured that steam flows smoothly, and the steam flow is rapidly and accurately adjusted.

Description

Technical Field

[0001] The invention relates to the technical field of steam injection devices, and in particular to an adjustable steam injector. Background Art

[0002] Steam ejectors, as a fluid machinery and mixing reaction equipment that uses jet turbulence and diffusion to transfer mass and energy, have been widely used in industrial production. Traditional steam ejectors are mainly composed of nozzles, throats, diffusers, and suction chambers. High-pressure air flows out of the nozzle at high speed to eject low-pressure gas around the nozzle. The two air flows are mixed and 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 being greatly affected by changes in external steam parameters.

[0003] Especially in industrial production, changes in external steam parameters, especially when the exhaust steam flow rate changes significantly, the ejector's ejection performance changes dramatically, and it is impossible to achieve the best ejection performance designed by the ejector, that is, the minimum power steam consumption. Therefore, there is an urgent need for a new type of steam ejector that can maintain the best ejection performance under different working conditions, reduce power steam consumption, and improve energy utilization. Summary of the invention

[0004] The present invention provides an adjustable steam ejector to solve at least one of the technical problems raised by the above background technology.

[0005] In order to solve the above technical problems, the present invention provides an adjustable steam ejector, comprising: an ejection cavity, a mixing cavity, a nozzle tube, a diffuser tube body, an adjusting mechanism, and a driving mechanism; a driving mechanism is fixedly provided on the right side of the ejection cavity, a power steam chamber is fixedly provided on the top of the ejection cavity, the right end of the ejection cavity is fixedly connected to the nozzle tube along the left-right direction, a mixing cavity is fixedly provided on the right end of the nozzle tube, a diffuser tube body is fixedly provided on the right end of the mixing cavity, the ejection cavity, the nozzle tube, the mixing cavity and the diffuser tube body are fixedly connected axially from left to right in sequence, an adjusting mechanism along the left-right direction is slidably provided in the ejection cavity, the nozzle tube, the mixing cavity and the diffuser tube body, and the left end of the adjusting mechanism is fixedly connected to the driving mechanism.

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

[0007] Preferably, the circular throat in the nozzle tube and the outlet of the injection cavity are on the same axis, the right end of the nozzle tube is horizontally inserted 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 the air input pipe is fixedly installed with a second solenoid valve.

[0008] Preferably, the right end of the mixing chamber is fixedly connected to the first diffuser tube along the left-right direction, a pair of second sliding grooves along the left-right direction are opened in the front and rear side walls inside the first diffuser tube, the second diffuser tube is installed with bolts on the right end of the first diffuser tube, a pair of third sliding grooves along the left-right direction are opened in the front and rear side walls inside 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 the circular tube three, and a third switch mechanism is fixedly provided inside the circular tube three.

[0009] Preferably, the adjustment mechanism includes: a first adjusting cone, a second adjusting cone and a third adjusting cone, the second adjusting cone is connected to the second sliding groove for sliding left and right, the left wall of the injection cavity is rotatably connected to the axial bidirectional lead screw, the axes of the first adjusting cone and the second adjusting cone are respectively threadedly connected to the opposite threaded sections of the bidirectional lead screw, a third adjusting cone is provided in the third sliding groove for sliding left and right, and a second sealing ring is fixedly connected to the first adjusting cone, the second adjusting cone and the third adjusting cone.

[0010] Preferably, the right end of the third adjusting cone is fixedly connected to the first driving transmission mechanism, and the first driving transmission mechanism comprises: an L-shaped push rod, the right bottom end of the L-shaped push rod is fixedly connected to the internal threaded sleeve, a pair of mounting bearings are fixedly installed on the inner bottom wall of the second diffuser tube with a spacing of left and right, a sliding screw is rotatably connected between the left and right mounting bearings, the sliding screw is threadedly connected to the internal threaded sleeve, the right end of the sliding screw is fixedly connected to bevel gear one, bevel gear one is meshingly connected to bevel gear two, the axis 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 outer wall of the bottom of the second diffuser tube.

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

[0012] Preferably, the third switch mechanism includes: a shell body 1, the top of the circular tube 3 is fixedly connected to the shell body 1, the middle of the shell body 1 is fixedly connected to a cross bar 1, the center of the cross bar 1 is fixedly connected to a servo motor, the front end of the output shaft of the servo motor is fixedly connected to a cam, a baffle is pressed under the cam, the bottom end of the baffle is fixedly connected to a vertical rod 1, the vertical rod 1 slides up and down and passes through the top wall of the circular tube 3, a spring 1 is provided on the outer sleeve of the upper section of the vertical rod 1, the bottom end of the vertical rod 1 is fixedly connected to a porous plate 1, and a porous plate 2 is fixedly provided on the left side of the porous plate 1 in the circular tube 3.

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

[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 cavity in real time;

[0016] A steam detection module, used to detect the water vapor partial pressure value in 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] A comparison and judgment unit, used for comparing and judging the occurrence of abnormal water vapor diffusion coefficient in the mixing chamber of the steam ejector;

[0019] A steam delivery unit, used for conveying steam under pressure into the introduction room, which is achieved by a pressurized fan;

[0020] Alarm, used to warn of 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 respectively.

[0022] Preferably, the first calculation module includes:

[0023] Where: D S is the water vapor diffusion coefficient 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 is the friction resistance correction coefficient of water vapor flow, which is 1.1; τ is the diameter of the small droplets of liquefied water vapor in the mixing chamber; P 1 The steam detection module detects the partial pressure of water vapor at the mixing chamber port far away from the air input pipe, P 2 The steam detection module detects the partial pressure of water vapor at the entrance of the injection cavity into the mixing cavity; R is the universal gas constant; is the water vapor flow inertia correction coefficient, m tT is the mass change coefficient of the liquefied droplet per unit time, c is the steam temperature value in the mixing chamber at the end of the detection period, T 0 is the steam temperature value in the mixing chamber at the initial moment of the detection period, T max is the maximum operating temperature of the inner wall of the mixing chamber detected by the temperature detection module, T min is the lowest working temperature of the inner wall of the mixing chamber detected by the temperature detection module; ln is the natural logarithm, π is the pi, the value is 3.14, l is the flow resistance error adjustment coefficient, the value is 0.2, N is the total number of detection points, G j Detecting the partial pressure fluctuation coefficient for the steam detection module at the jth detection point;

[0024] The comparison and judgment unit compares the water vapor diffusion coefficient in the mixing chamber of the steam ejector within the detection time period calculated by the first calculation module with its threshold value. When the water vapor diffusion coefficient is greater than its threshold value, the control system controls the steam delivery unit to reduce the output power of the pressurized fan, reduce the flow rate of steam entering the induced chamber, and thereby reduce the rate at which the flue gas waste heat is converted into water vapor thermal energy. When the water vapor diffusion coefficient is less than its threshold value, the control system controls the steam delivery unit to increase the output power of the pressurized fan. When the water vapor diffusion coefficient is still not within the threshold value 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, the motive steam enters the ejection cavity through the motive steam chamber to generate a high-speed steam flow. The driving mechanism dynamically adjusts the flow channels in the nozzle tube, the mixing cavity and the diffuser body through the adjusting mechanism. Specifically, the first driving transmission mechanism of the driving mechanism slides in the ejection cavity, the nozzle tube, the mixing cavity and the diffuser body, thereby changing the flow cross-section or shape inside these components, and then adjusting the flow rate, pressure and flow rate of the steam flow. The regulated steam flow is mixed with the ejection fluid (such as low-pressure steam or water) in the mixing cavity to form a uniform mixed fluid, and then the mixed fluid is diffused through the diffuser body to increase the pressure and output.

[0026] Beneficial effects:

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

[0028] 2. Improve energy efficiency: By accurately adjusting the parameters of the steam flow, the working state of the steam ejector can be optimized, energy loss can be reduced, and energy efficiency can be improved. At the same time, dynamic adjustment can also ensure that the steam ejector can maintain a high working efficiency under different working conditions.

[0029] 3. Easy maintenance: The design of the adjustment mechanism and the drive mechanism makes the internal structure of the steam ejector relatively simple, easy to maintain and overhaul. In addition, the dynamic adjustment function also reduces the performance degradation caused by flow channel blockage or wear, and prolongs the service life of the steam ejector.

[0030] 4. Wide application: Due to the advantages of flexible adjustment and high energy efficiency, the adjustable steam ejector provided in the embodiment of the present invention can be widely used in various occasions requiring steam injection, such as steam turbines, steam compressors, steam heaters, etc., and has broad market prospects and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a front cross-sectional schematic diagram of the steam ejector of the present invention;

[0033] Figure 2 yes Figure 1 A partial enlarged schematic diagram in the middle;

[0034] Figure 3 yes Figure 1 A partial enlarged schematic diagram of point B in the middle;

[0035] Figure 4 yes Figure 1 A partial enlarged schematic diagram of point C in the middle;

[0036] Figure 5 yes Figure 1 A partial enlarged schematic diagram of point D in the middle.

[0037] Reference numerals:

[0038] 1. Injection cavity; 101. Power steam chamber; 102. First sliding groove; 2. Nozzle tube; 21. Circular throat; 22. Mixing cavity; 221. Air input pipe; 222. Solenoid valve 2; 223. Air blower; 23. Diffuser tube; 231. First diffuser tube; 2311. Second sliding groove; 232. Second diffuser tube; 2321. Third sliding groove; 233. Rubber connecting tube; 234. Round tube 3; 3. Adjustment mechanism; 31. First adjustment cone; 32. Second adjustment cone; 321. Second sealing ring; 33. Third adjustment cone; 34. First drive transmission mechanism; 341. L-shaped push rod; 342. Inner Threaded sleeve; 343, mounting bearing; 344, sliding screw; 345, bevel gear one; 346, bevel gear two; 347, adjusting motor; 4, driving mechanism; 41, steam inlet pipe; 411, solenoid valve one; 42, first sealing ring; 421, rectangular frame; 422, driving motor; 423, worm; 424, transmission shaft; 425, two-way screw; 426, worm wheel; 427, adjusting handle; 5, third switch mechanism; 51, housing one; 52, cross bar one; 53, servo motor; 54, cam; 55, baffle; 56, vertical bar one; 57, spring one; 58, porous plate one; 59, porous plate two. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0041] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0042] The present invention provides the following embodiments

[0043] Example 1

[0044] The embodiment of the present invention provides an adjustable steam ejector, such as Figure 1 As shown, it includes: an ejection cavity 1, a mixing cavity 22, a nozzle tube 2, a diffuser tube body 23, an adjustment structure, and a driving mechanism 4; the driving mechanism 4 is fixedly arranged on the right side of the ejection cavity 1, and a power steam chamber 101 is fixedly arranged on the top of the ejection cavity 1; the right end of the ejection cavity 1 is fixedly connected to the nozzle tube 2 along the left-right direction, the right end of the nozzle tube 2 is fixedly provided with a mixing cavity 22, and the right end of the mixing cavity 22 is fixedly provided with a diffuser tube body 23; the ejection cavity 1, the nozzle tube 2, the mixing cavity 22 and the diffuser tube body 23 are fixedly connected axially from left to right in sequence; an adjustment mechanism 3 along the left-right direction is slidably arranged in the ejection cavity 1, the nozzle tube 2, the mixing cavity 22 and the diffuser tube body 23, and the left end of the adjustment mechanism 3 is fixedly connected to the driving 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 power steam enters the ejection cavity 1 through the power steam chamber 101 to generate a high-speed steam flow. The driving mechanism 4 dynamically adjusts the flow channels in the nozzle tube 2, the mixing cavity 22 and the diffuser body 23 through the adjusting mechanism 3. Specifically, the first driving transmission mechanism 34 of the driving mechanism 4 slides in the ejection cavity 1, the nozzle tube 2, the mixing cavity 22 and the diffuser body 23, thereby changing the flow cross-section or shape inside these components, and then adjusting the flow rate, pressure and flow rate of the steam flow. The regulated steam flow is mixed with the ejection fluid (such as low-pressure steam or water) in the mixing cavity 22 to form a uniform mixed fluid, and then 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 driving mechanism 4 and the adjusting mechanism 3, the internal flow channel of the steam ejector can be dynamically adjusted, so that the parameters of the steam flow, such as flow rate, pressure and flow rate, can be flexibly adjusted according to actual needs, thereby improving the adaptability and flexibility of the steam ejector.

[0048] 2. Improve energy efficiency: By accurately adjusting the parameters of the steam flow, the working state of the steam ejector can be optimized, energy loss can be reduced, and energy efficiency can be improved. At the same time, dynamic adjustment can also ensure that the steam ejector can maintain a high working efficiency under different working conditions.

[0049] 3. Easy maintenance: The design of the adjustment mechanism 3 and the driving mechanism 4 makes the internal structure of the steam ejector relatively simple, and easy to maintain and overhaul. In addition, the dynamic adjustment function also reduces the performance degradation caused by flow channel blockage or wear, and prolongs the service life of the steam ejector.

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

[0051] Example 2

[0052] On the basis of Example 1, Figure 1-Figure 4 As shown, 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 ejection cavity 1, and an electromagnetic valve 411 is fixedly installed on the steam input pipe 41; a first sealing ring 42 is used to seal between the power steam chamber 101 and the steam input pipe 41, and the first sliding grooves 102 in the left and right directions are symmetrically opened on the upper and lower walls of the ejection cavity 1.

[0053] The circular throat 21 in the nozzle tube 2 is on the same axis as the outlet of the injection cavity 1. The right end of the nozzle tube 2 is laterally inserted into the mixing cavity 22. The bottom end of the mixing cavity 22 is fixedly connected to an 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.

[0054] The right end of the mixing cavity 22 is fixedly connected to the first diffuser tube 231 along the left-right direction, and a pair of second sliding grooves 2311 along 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 the second diffuser tube 232 by bolts, and a pair of third sliding grooves 2321 along the left-right direction are provided 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 the third round tube 234, and a third switch mechanism 5 is fixedly provided inside the third round tube 234.

[0055] The third switch mechanism 5 includes: a shell 51, the top of the circular tube 234 is fixedly connected to the shell 51, the middle of the shell 51 is fixedly connected to a cross bar 52, the center of the cross bar 52 is fixedly connected to a servo motor 53, the front end of the output shaft of the servo motor 53 is fixedly connected to a cam 54, a baffle 55 is pressed against the bottom of the cam 54, the bottom end of the baffle 55 is fixedly connected to a vertical rod 56, the vertical rod 56 slides up and down and passes through the top wall of the circular tube 234, a spring 57 is provided on the upper part of the vertical rod 56, the bottom end of the vertical rod 56 is fixedly connected to a porous plate 58, and a porous plate 2 59 is fixedly provided on the left side of the porous plate 58 in the circular tube 234.

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

[0057] Working principle:

[0058] On the basis of Example 1, Example 2 adds a control mechanism for the steam input pipe 41 and the air input pipe 221, as well as a further detailed design of the mixing chamber 22 and the diffuser tube body 23. Steam is controlled to enter the power steam chamber 101 through the solenoid valve 1 411 on the steam input pipe 41, and then enters the injection cavity 1. At the same time, air is controlled to enter the mixing chamber 22 through the blower 223 and the solenoid valve 222 on the air input pipe 221. The design of the nozzle tube 2 ensures the effective mixing of the steam flow and the injection fluid (such as air). The mixed fluid enters the first diffuser tube 231 and the second diffuser tube 232, and the position of the porous plate 58 is adjusted by the adjustment mechanism 3 (such as the cam 54 and baffle 55 mechanism driven by the servo motor 53 in the third switch mechanism 5), so as to further adjust the pressure and flow of the mixed fluid;

[0059] When the third switch mechanism 5 is working, the servo motor 53 drives the cam 54 to rotate, and the cam 54 rotates to tighten the baffle 55 and the vertical rod 1 56 to slide up and down. The spring 1 57 provides a reset elastic force. When the vertical rod 1 56 slides up and down, it drives the porous plate 1 58 to slide up and down. The air holes on the porous plate 1 58 and the porous plate 2 59 are reciprocally connected to control the pressure and flow of the mixed fluid. The servo motor 53 can accurately control the area of ​​the connection and misalignment of the air holes on the porous plate 1 58 and the porous plate 2 59.

[0060] Beneficial effects:

[0061] Precise control: Through the solenoid valve 1 411 and the solenoid valve 2 222, the input amount of steam and air can be precisely controlled, thereby achieving precise adjustment of the mixed fluid parameters.

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

[0063] Flexible adjustment: The design of the third switch mechanism 5 allows the flow channel in the diffuser tube body 23 to be flexibly adjusted, further improving the adaptability and flexibility of the steam ejector.

[0064] Improve energy efficiency: By precisely controlling the input amount and adjusting the flow path, the working state of the steam ejector can be optimized, energy loss can be reduced, and energy efficiency can be improved.

[0065] Example 3

[0066] On the basis of Example 1, 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 connected to the second sliding groove 2311 for sliding left and right. The left wall of the injection cavity 1 is rotatably connected to the axial bidirectional lead screw 425. The axes of the first adjustment cone 31 and the second adjustment cone 32 are respectively threadedly connected to the opposite threaded sections of the bidirectional lead screw 425. The third adjustment cone 33 is provided in the third sliding groove 2321 for sliding left and right. 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.

[0067] The right end of the third adjusting cone 33 is fixedly connected to the first driving transmission mechanism 34, and the first driving transmission mechanism 34 includes: an L-shaped push rod 341, and the right bottom end of the L-shaped push rod 341 is fixedly connected to the internal threaded sleeve 342, and the inner bottom wall of the second diffuser tube 232 is fixedly installed with a pair of mounting bearings 343 spaced apart on the left and right sides, and the left and right mounting bearings 343 are rotatably connected with a sliding screw 344, and the sliding screw 344 is threadedly connected to the internal threaded sleeve 342, and the right end of the sliding screw 344 is fixedly connected to a bevel gear 1 345, and the bevel gear 1 345 is meshed with a bevel gear 2 346, and the axis of the bevel gear 2 346 is fixedly connected to the output shaft end of the adjusting motor 347, and the adjusting motor 347 is fixedly connected to the outer wall of the bottom of the second diffuser tube 232.

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

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

[0070] Working principle:

[0071] On the basis of Example 1, Example 3 describes in detail the specific structure and working mode of the adjustment mechanism 3 and the driving 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 in their respective sliding grooves through the drive of the bidirectional lead screw 425 and the sliding lead screw 344, thereby changing the cross section or shape of the flow channel. The driving mechanism 4 includes a driving motor 422 and a worm 423 and a worm gear 426 transmission mechanism, as well as an adjustment motor 347 and a sliding lead screw 344. Of course, manual adjustment can be performed through the adjustment handle 427, and they together realize precise control of the adjustment mechanism 3;

[0072] When the first driving transmission mechanism 34 is working, the adjusting motor 347 drives the bevel gear 2 346 to rotate, and the bevel gear 2 346 meshes and drives so that the bevel gear 1 345 and the sliding screw 344 rotate synchronously in the mounting bearing 343. The sliding screw 344 rotates so that the internal thread sleeve 342 and the L-shaped push rod 341 move synchronously to push the third adjusting cone 33 to slide left and right in the second diffuser tube 232 for adjustment;

[0073] When the driving mechanism 4 is working, the driving motor 422 drives the worm 423 to rotate. The rotation of the worm 423 causes the worm wheel 426, the transmission shaft 424 and the bidirectional lead screw 425 to rotate synchronously through meshing transmission. The rotation of the bidirectional lead screw 425 causes the first adjustment cone 31 and the second adjustment cone 32 on the left and right sides to slide towards each other for adjustment.

[0074] Beneficial effects:

[0075] Precise adjustment: By driving the bidirectional lead screw 425 and the sliding lead screw 344, precise control of the adjustment mechanism 3 can be achieved, 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 driving mechanism 4 is relatively simple, and they are easy to maintain and overhaul.

[0078] Improve energy efficiency: By precisely adjusting the flow path, the working state of the steam ejector can be optimized, energy loss can be reduced, and energy efficiency can be improved.

[0079] Example 4

[0080] On the basis of embodiment 1, an intelligent detection and adjustment system is further provided, including:

[0081] The first temperature detection module is used to detect the temperature 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 ejection cavity 1 in real time;

[0083] A steam detection module, used to detect the water vapor partial pressure value in the steam ejector;

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

[0085] A comparison and judgment unit, used for comparing and judging the occurrence of abnormal water vapor diffusion coefficient in the mixing chamber 22 of the steam ejector;

[0086] A steam delivery unit, used for conveying steam under pressure into the introduction room, which is achieved by a pressurized fan;

[0087] Alarm, used to warn of 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 respectively.

[0089] The first calculation module includes:

[0090] Where: D S is the diffusion coefficient of water vapor in the mixing chamber 22 of the steam ejector during the detection period; M is the gas molar mass of water vapor in the steam ejector; k l is the water vapor flow friction resistance correction coefficient, which is 1.1; τ is the diameter of the small droplets liquefied from the water vapor in the mixing cavity 22; P 1 The steam detection module detects the water vapor partial pressure at the mixing chamber 22 far away from the air input pipe, P 2 The steam detection module detects the partial pressure of water vapor at the outlet of the injection cavity 1 entering the mixing cavity 22; R is the universal gas constant; is the water vapor flow inertia correction coefficient, m t T is the mass change coefficient of the liquefied droplet per unit time, c is the steam temperature value in the mixing chamber 22 at the end of the detection time period, T 0 is the steam temperature value in the mixing chamber 22 at the initial moment of the detection period, T max is the maximum operating temperature of the inner wall of the mixing chamber 22 detected by the temperature detection module, T min is the lowest working temperature of the inner wall of the mixing chamber 22 detected by the temperature detection module; ln is the natural logarithm, π is the pi, the value is 3.14, l is the flow resistance error adjustment coefficient, the value is 0.2, N is the total number of detection points, G j Detecting the partial pressure fluctuation coefficient for the steam detection module at the jth detection point;

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

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

[0093] Working principle:

[0094] On the basis of Example 1, Example 4 adds an intelligent detection and adjustment system, which detects the working state of the steam ejector in real time through multiple detection modules (such as the first temperature detection module, the second temperature detection module, and the steam detection module), and calculates the water vapor diffusion coefficient in the mixing cavity 22 through the first calculation module. 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 according to the comparison result, thereby adjusting the flow rate of steam entering the ejection cavity 1 and the rate at which the flue gas waste heat converts the thermal energy of water vapor.

[0095] Beneficial effects:

[0096] Intelligent control: The introduction of 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 of multiple detection modules can promptly detect abnormal operation of the steam ejector and avoid potential safety hazards.

[0098] Optimization and regulation: 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 and the energy efficiency and stability can be improved.

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

[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions 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: An ejection cavity (1), a mixing cavity (22), a nozzle tube (2), a diffuser tube (23), an adjustment mechanism (3) and a driving mechanism (4); the right side of the ejection cavity (1) is fixedly provided with a driving mechanism (4); the top of the ejection cavity (1) is fixedly provided with a power steam chamber (101); the right end of the ejection cavity (1) is fixedly connected to the nozzle tube (2) in the left-right direction; the right end of the nozzle tube (2) is fixedly provided with a mixing cavity (22); the right end of the mixing cavity (22) is fixedly provided with a diffuser tube (23); the ejection cavity (1), the nozzle tube (2), the mixing cavity (22) and the diffuser tube (23) are fixedly connected in the axial direction from left to right in sequence; the ejection cavity (1), the nozzle tube (2), the mixing cavity (22) and the diffuser tube (23) are slidably provided with an adjustment mechanism (3) in the left-right direction; the left end of the adjustment mechanism (3) is fixedly connected to the driving mechanism (4).

2. The adjustable steam ejector according to claim 1, characterized in that: include: The right end of the power steam chamber (101) is fixedly connected to a steam input pipe (41), the output end of the steam input pipe (41) is fixedly connected to the top of the ejection cavity (1), and a solenoid valve (411) is fixedly installed on the steam input pipe (41); a first sealing ring (42) is used to seal between the power steam chamber (101) and the steam input pipe (41), and first sliding grooves (102) in left and right directions are symmetrically opened on the upper and lower walls of the ejection cavity (1).

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

4. The adjustable steam ejector according to claim 1, characterized in that: 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 provided in the front and rear side walls of the first diffuser tube (231); a second diffuser tube (232) is installed on the right end of the first diffuser tube (231) by bolts; a pair of third sliding grooves (2321) along the left-right direction are provided in 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 third circular tube (234); a third switch mechanism (5) is fixedly provided in the third circular tube (234).

5. The adjustable steam ejector according to claim 4, characterized in that: The adjustment mechanism (3) comprises: a first adjustment cone (31), a second adjustment cone (32) and a third adjustment cone (33); the second adjustment cone (32) is connected to the second sliding groove (2311) for sliding left and right; the left wall of the ejection 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 threadedly connected to opposite threaded sections of the bidirectional lead screw (425); the third adjustment cone (33) is provided in the third sliding groove (2321) for sliding left and right; and 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).

6. The adjustable steam ejector according to claim 5, characterized in that: The right end of the third adjusting cone (33) is fixedly connected to the first driving transmission mechanism (34), and the first driving transmission mechanism (34) comprises: an L-shaped push rod (341), the right bottom end of the L-shaped push rod (341) is fixedly connected to the internal thread sleeve (342), a pair of mounting bearings (343) are fixedly installed on the inner bottom wall of the second diffuser tube (232) at intervals on the left and right, 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 thread sleeve (342), the right end of the sliding screw (344) is fixedly connected to bevel gear 1 (345), bevel gear 1 (345) is meshedly connected to bevel gear 2 (346), the axis of bevel gear 2 (346) is fixedly connected to the output shaft end of the adjusting motor (347), and the adjusting motor (347) is fixedly connected to the outer wall of the bottom of the second diffuser tube (232).

7. The adjustable steam ejector according to claim 6, characterized in that: The driving mechanism (4) comprises: a rectangular frame (421), the rectangular frame (421) is fixedly installed on the left side of the ejection cavity (1), a vertical driving motor (422) is fixedly installed on the top of the rectangular frame (421), the output shaft end of the driving motor (422) is fixedly connected to a worm (423), the center of the rectangular frame (421) is rotatably connected to a transmission shaft (424), the right end of the transmission shaft (424) is fixedly connected to a bidirectional lead screw (425), the center of the transmission shaft (424) is fixedly connected to a worm wheel (426), the worm wheel (426) is meshedly connected to the worm (423), and the left end of the transmission shaft (424) is fixedly connected to an adjustment handle (427).

8. The adjustable steam ejector according to claim 4, characterized in that: The third switch mechanism (5) comprises: 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 a crossbar (52), the center of the crossbar (52) is fixedly connected to a servo motor (53), the front end of the output shaft of the servo motor (53) is fixedly connected to a cam (54), a baffle (55) is pressed against the bottom of the cam (54), the bottom end of the baffle (55) is fixedly connected to a vertical rod (56), the vertical rod (56) slides up and down and passes through the top wall of the circular tube (234), a spring (57) is provided on the upper part of the vertical rod (56), the bottom end of the vertical rod (56) is fixedly connected to a porous plate (58), and a porous plate (59) is fixedly provided on the left side of the porous plate (58) in the circular tube (234).

9. The adjustable steam ejector according to claim 6, characterized in that: It is also equipped with an intelligent detection and adjustment system, which includes: A first temperature detection module, used for detecting in real time the temperature of steam entering the mixing chamber (22) from the power steam chamber (101); A second temperature detection module, used for detecting the temperature value of the inner wall of the ejection cavity (1) in real time; A steam detection module, used to detect the water vapor partial pressure value in the steam ejector; A first calculation module, used to calculate the water vapor diffusion coefficient in the mixing chamber (22) of the steam ejector; A comparison and judgment unit, used for comparing and judging the occurrence of an abnormality in the water vapor diffusion coefficient in the mixing chamber (22) of the steam ejector; A steam delivery unit, used for conveying steam under pressure into the introduction room, which is achieved by a pressurized fan; Alarm, used to warn of 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 respectively.

10. The adjustable steam ejector according to claim 7, characterized in that: The first calculation module includes: Where: D S is the diffusion coefficient of water vapor in the mixing chamber (22) of the steam ejector during the detection period; M is the gas molar mass of water vapor in the steam ejector; k l is the water vapor flow friction resistance correction coefficient, which takes a value of 1.1; τ is the diameter of the small droplets of liquefied water vapor in the mixing cavity (22); P1 is the water vapor partial pressure detected by the steam detection module at the entrance of the mixing cavity (22) away from the air input pipe, and P2 is the water vapor partial pressure detected by the steam detection module at the entrance of the injection cavity (1) into the mixing cavity (22); R is the universal gas constant; is the water vapor flow inertia correction coefficient, m t T is the mass change coefficient of the liquefied droplet per unit time, c is the steam temperature value in the mixing cavity (22) at the end of the detection time period, T0 is the steam temperature value in the mixing cavity (22) at the beginning of the detection time period, T max is the maximum operating temperature of the inner wall of the mixing chamber (22) detected by the temperature detection module, T min is the lowest working temperature of the inner wall of the mixing cavity (22) detected by the temperature detection module; ln is the natural logarithm, π is the circumference of a circle, and its value is 3.14; l is the flow resistance error adjustment coefficient, and its value is 0.2; N is the total number of detection points, and G j Detecting the partial pressure fluctuation coefficient for the steam detection module at the jth detection point; 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 value. When the water vapor diffusion coefficient is greater than the threshold value, the control system controls the steam delivery unit to reduce the output power of the booster fan, reduce the flow rate of steam entering the ejection chamber (1), and thereby reduce the rate at which the flue gas waste heat is converted into water vapor thermal energy. When the water vapor diffusion coefficient is less than the threshold value, the control system controls the steam delivery unit to increase the output power of the booster fan. When the water vapor diffusion coefficient is still not within the threshold value after one adjustment, the alarm device issues an abnormal alarm.

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