Connecting and positioning device for adjusting cone of steam ejector

Abstract

The utility model provides a connecting and positioning device of a steam ejector adjusting cone, and belongs to the technical field of steam ejectors. The problems that an existing adjusting cone connecting and positioning device is insufficient in coaxiality, poor in stability and insufficient in sealing are solved. The device comprises an adjusting cone, a connecting assembly, a positioning assembly, an actuator and an injection chamber end plate, the adjusting cone comprises a cone head, a cone rod and a cone tail which are sequentially connected through a connecting assembly, and the cone tail penetrates through the end plate of the injection chamber to be connected with the actuator; the positioning assembly comprises a shaft sleeve assembly, a center pipe and inclined supporting plates, the adjusting cone sequentially penetrates through the shaft sleeve assembly and the center pipe and then is inserted into the injection chamber, the upper end of the center pipe is fixedly connected with an end plate of the injection chamber, and the inclined supporting plates are evenly distributed in the circumferential direction of the center pipe. According to the utility model, the interference fit of the stud and the screw sleeve is ensured by a hot charging method, the coaxiality and firm connection of the adjusting cone in the large steam ejector are ensured, the adjusting cone is effectively prevented from loosening under the high-speed flow and vibration of steam, and the connection stability of the device is improved.

Description

Technical Field

[0001] This utility model relates to the field of steam ejector technology, and in particular to a connection and positioning device for a steam ejector adjusting cone. Background Technology

[0002] A steam ejector is a device that uses the energy of high-pressure steam to eject low-pressure steam, making it usable. It has wide applications in energy, chemical, and environmental protection fields. The regulating cone, as a key component, regulates flow by changing the nozzle throat area through axial movement. The performance of its connection and positioning device plays a decisive role in the overall efficiency of the steam ejector. However, existing connection and positioning devices for the regulating cone in large steam ejectors have several shortcomings: poor coaxiality between the regulating cone and the nozzle throat axis leads to uneven flow field; vibration or misalignment is prone to occur during adjustment, resulting in poor stability and severely affecting adjustment accuracy and ejection efficiency; traditional sealing methods have defects, easily causing steam leakage and reducing system energy efficiency.

[0003] To address the aforementioned shortcomings and problems, there is an urgent need to design a connection and positioning device for the steam ejector adjusting cone, so as to achieve precise axial positioning of the adjusting cone and improve its dynamic stability and steam sealing performance. Summary of the Invention

[0004] A brief overview of the present invention is given below to provide a basic understanding of certain aspects thereof. It should be understood that this overview is not an exhaustive summary of the present invention. It is not intended to identify key or essential parts of the present invention, nor is it intended to limit the scope of the present invention. Its purpose is merely to present certain concepts in a simplified form as a prelude to the more detailed description that follows.

[0005] In view of this, in order to solve the problems of insufficient coaxiality, poor stability and insufficient sealing of the current adjusting cone connection positioning device, this utility model provides a connection positioning device for the steam ejector adjusting cone.

[0006] The present invention provides a connection and positioning device for a steam ejector adjusting cone, comprising an adjusting cone, a connecting assembly, a positioning assembly, a sealing assembly, an actuator, and an ejector chamber end plate.

[0007] The adjusting cone includes a cone head, a cone rod, and a cone tail. The cone head, cone rod, and cone tail are connected in sequence by a connecting assembly. The cone tail passes through the ejector chamber end plate and is connected to the actuator.

[0008] The positioning assembly includes a bushing assembly, a central tube, and a bracing plate. The adjusting cone passes through the bushing assembly and the central tube and is then inserted into the ejector chamber. The bushing assembly is fixedly installed in the ejector channel. The upper end of the central tube is fixedly connected to the ejector chamber end plate. Multiple bracing plates are evenly distributed along the circumference of the central tube. The two ends of the bracing plates are fixedly connected to the central tube and the ejector chamber end plate, respectively.

[0009] The sealing assembly is installed between the cone tail and the ejector chamber end plate.

[0010] Furthermore, the tapered rod has a segmented structure and is fixedly connected by a connecting assembly.

[0011] Furthermore, the connecting assembly includes a stud, a sleeve, and a set screw. The stud and the sleeve are connected by a heat-fitting threaded connection, and then fixed by the set screw.

[0012] Furthermore, the stud and the sleeve are interference fit.

[0013] Furthermore, the bushing assembly includes a bushing, a first carbon crystal ring, a positioning sleeve, and a first spare cap. The bushing is disposed within the ejector channel and is coaxially engaged with the cone rod.

[0014] An annular cavity is formed between the bushing and the tapered rod. Two sets of first carbon crystal rings and positioning sleeves are provided in the cavity. The first carbon crystal rings and positioning sleeves are placed at intervals and fixed by a first spare cap. The first spare cap is threaded to the bushing and its top surface is flush with the bushing.

[0015] Furthermore, the sealing assembly includes a flange cover, flange fasteners, a round nut, a second carbon crystal ring, a second spare cap, a support pad, a flexible graphite ring, a metal spiral wound gasket, a sealing sleeve, a sealing gland, and a gland fastener.

[0016] The flange cover has a through hole at its central axis and is coaxially fitted with the cone tail; the bottom flange of the flange cover fits with the top groove of the ejector chamber end plate and is fixedly connected by flange fasteners; the top of the flange cover is connected to the flange of the actuator and is fixed by a round nut.

[0017] The flange cover has a positioning groove at the bottom of the through hole, and a second carbon crystal ring and a second spare cap are provided in the positioning groove. The second spare cap is threadedly connected to the flange cover to fix the second carbon crystal ring.

[0018] The flange cover has a sealing groove at the top of the through hole, and multiple flexible graphite rings are provided in the sealing groove. Metal spiral wound gaskets are installed at intervals between the flexible graphite rings. The bottom of the metal spiral wound gasket is fixedly connected to the support pad, and the top is fixedly connected to the sealing sleeve.

[0019] The outer side of the sealing sleeve is fitted with a sealing cover, which is fixedly connected to the actuator flange by cover fasteners.

[0020] Furthermore, an annular sealing ring is provided between the flange of the flange cover and the groove at the top of the ejector chamber end plate.

[0021] The present invention has the following advantages over the prior art:

[0022] 1. This utility model device ensures the interference fit between the stud and the sleeve through a heat fitting method, ensuring the coaxiality and firm connection of the adjusting cone in the large steam ejector, effectively preventing the adjusting cone from loosening under high-speed steam flow and vibration, and improving the connection stability of the device;

[0023] 2. This utility model device sets multiple bushings and carbon crystal rings in a large steam ejector, which realizes the precise positioning of the adjusting cone and can meet the high-precision adjustment requirements;

[0024] 3. The device of this utility model adopts a sealing method that combines multiple flexible graphite rings and metal spiral wound gaskets to ensure a leakage rate of <0.01%, and can adapt to high temperature and high pressure steam environment. Attached Figure Description

[0025] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0026] Figure 1 A schematic diagram of the connection and positioning device for a steam ejector adjusting cone;

[0027] Figure 2 This is a structural diagram of the connecting components;

[0028] Figure 3 This is a schematic diagram of the bushing assembly.

[0029] Figure 4 This is a schematic diagram of the sealing assembly.

[0030] In the diagram: 1-Adjusting cone, 2-Connecting assembly, 3-Sleeve assembly, 4-Central tube, 5-Diagonal brace, 6-Sealing assembly, 7-Actuator, 8-Ejector chamber end plate, 11-Cone head, 12-Cone rod, 13-Cone tail, 21-Stud, 22-Sleeve sleeve, 23-Set screw, 24-Sleeve, 31-Sleeve, 32-First carbon crystal ring, 33-Positioning sleeve, 34-First spare cap, 61-Flange cover, 62-Sealing ring, 63-Flange fastener, 64-Round nut, 65-Second carbon crystal ring, 66-Second spare cap, 67-Support pad, 68-Flexible graphite ring, 69-Metal spiral wound gasket, 610-Sealing pressure sleeve, 611-Sealing pressure cap, 612-Pressure cap fastener. Detailed Implementation

[0031] To make the technical solutions and advantages of the embodiments of this utility model clearer, the exemplary embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0032] Example 1, Reference Figure 1-4 This embodiment describes a connection and positioning device for a steam ejector adjusting cone, comprising an adjusting cone 1, a connecting assembly 2, a positioning assembly, a sealing assembly 6, an actuator 7, and an ejector chamber end plate 8.

[0033] The adjusting cone 1 includes a cone head 11, a cone rod 12, and a cone tail 13. The cone head 11, cone rod 12, and cone tail 13 are connected in sequence by a connecting assembly 2. The cone tail 13 passes through the ejector chamber end plate 8 and is connected to the actuator 7.

[0034] The positioning assembly includes a bushing assembly 3, a central tube 4, and a bracing plate 5. The adjusting cone 1 passes through the bushing assembly 3 and the central tube 4 and is inserted into the ejector chamber. The bushing assembly 3 is fixedly installed in the ejector channel. The upper end of the central tube 4 is fixedly connected to the ejector chamber end plate 8. Multiple bracing plates 5 are evenly distributed around the central tube 4. The two ends of the bracing plates 5 are fixedly connected to the central tube 4 and the ejector chamber end plate 8, respectively.

[0035] The sealing assembly 6 is installed between the cone tail 13 and the ejector chamber end plate 8.

[0036] Furthermore, the tapered rod 12 has a segmented structure and is fixedly connected by the connecting component 2.

[0037] Furthermore, the connecting assembly 2 includes a stud 21, a threaded sleeve 22, and a set screw 23. The stud 21 and the threaded sleeve 22 are connected by a heat-fitting threaded connection, and then fixed by the set screw 23.

[0038] Furthermore, the stud 21 and the sleeve 22 are interference fits to ensure reliable connection and coaxiality of the various parts of the adjusting cone 1.

[0039] Furthermore, the bushing assembly 3 includes a bushing 31, a first carbon crystal ring 32, a positioning sleeve 33, and a first spare cap 34. The bushing 31 is disposed in the ejector channel and is coaxially engaged with the cone rod 12.

[0040] An annular cavity is formed between the bushing 31 and the cone rod 12. Two sets of first carbon crystal rings 32 and positioning sleeves 33 are provided in the cavity. The first carbon crystal rings 32 and positioning sleeves 33 are placed at intervals and fixed by a first spare cap 34. The first spare cap 34 is threadedly connected to the bushing 31 and its top surface is flush with the bushing. The function of the bushing assembly 3 is to ensure the coaxial cooperation between the adjusting cone 1 and the ejector channel.

[0041] Furthermore, the sealing assembly 6 includes a flange cover 61, a flange fastener 63, a round nut 64, a second carbon crystal ring 65, a second spare cap 66, a support pad 67, a flexible graphite ring 68, a metal spiral wound gasket 69, a sealing sleeve 610, a sealing gland 611, and a gland fastener 612.

[0042] The flange cover 61 has a through hole at its central axis and is coaxially fitted with the cone tail 13; the bottom flange of the flange cover 61 fits with the top groove of the ejector chamber end plate 8 and is fixedly connected by the flange fastener 63; the top of the flange cover 61 is connected to the flange of the actuator 7 and is fixed by the round nut 64.

[0043] The flange cover 61 has a positioning groove at the bottom of the through hole, and a second carbon crystal ring 65 and a second spare cap 66 are provided in the positioning groove. The second spare cap 66 is threadedly connected to the flange cover 61 to fix the second carbon crystal ring 65.

[0044] The flange cover 61 has a sealing groove at the top of the through hole, and a plurality of flexible graphite rings 68 are provided in the sealing groove. Metal spiral wound gaskets 69 are installed at intervals between the flexible graphite rings 68. The bottom of the metal spiral wound gaskets 69 is fixedly connected to the support pad 67, and the top is fixedly connected to the sealing sleeve 610.

[0045] The outer side of the sealing sleeve 610 is equipped with a sealing cover 611, and the sealing cover 611 is fixedly connected to the flange of the actuator 7 by a cover fastener 612; the function of the sealing assembly 6 is to prevent high temperature and high pressure steam in the ejector operating chamber from leaking out through the gap at the connection with the regulating cone 1.

[0046] Furthermore, an annular sealing ring 62 is provided between the flange of the flange cover 61 and the top groove of the ejector chamber end plate 8.

[0047] This utility model device ensures the interference fit between the stud and the sleeve through a heat fitting method, ensuring the coaxiality and firm connection of the adjusting cone in the large steam ejector, effectively preventing the adjusting cone from loosening under high-speed steam flow and vibration, and improving the connection stability of the device.

[0048] This utility model device adopts a sealing method combining multiple flexible graphite rings and metal spiral wound gaskets to ensure a leakage rate of <0.01%, which can adapt to high temperature and high pressure steam environment; at the same time, multiple bushings and carbon crystal rings are set in the large steam ejector to achieve precise positioning of the adjusting cone, which can meet the high precision adjustment requirements.

[0049] Although the present invention has been described with reference to a limited number of embodiments, those skilled in the art will understand from the foregoing description that other embodiments are conceivable within the scope of the present invention described herein. Furthermore, it should be noted that the language used in this specification has been chosen primarily for readability and edibility purposes, and not for interpreting or limiting the subject matter of the invention. Therefore, many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the appended claims. Regarding the scope of the invention, the disclosure made is illustrative and not restrictive, and the scope of the invention is defined by the appended claims.

Claims

1. A steam ejector diffuser cone attachment positioning device, characterised in that, Includes an adjusting cone (1), a connecting assembly (2), a positioning assembly, a sealing assembly (6), an actuator (7), and an ejector chamber end plate (8); The adjusting cone (1) includes a cone head (11), a cone rod (12) and a cone tail (13). The cone head (11), cone rod (12) and cone tail (13) are connected in sequence by a connecting assembly (2). The cone tail (13) passes through the ejector chamber end plate (8) and is connected to the actuator (7). The positioning assembly includes a bushing assembly (3), a central tube (4), and a bracing plate (5). The adjusting cone (1) passes through the bushing assembly (3) and the central tube (4) and is inserted into the ejector chamber. The bushing assembly (3) is fixedly installed in the ejector channel. The upper end of the central tube (4) is fixedly connected to the ejector chamber end plate (8). Multiple bracing plates (5) are evenly distributed along the circumference of the central tube (4). The two ends of the bracing plates (5) are fixedly connected to the central tube (4) and the ejector chamber end plate (8) respectively. The sealing assembly (6) is installed between the cone tail (13) and the ejector chamber end plate (8).

2. The device of claim 1, wherein: The cone rod (12) is a segmented structure and is fixedly connected by a connecting component (2).

3. The device of claim 1, wherein: The connecting assembly (2) includes a stud (21), a sleeve (22) and a set screw (23). The stud (21) and the sleeve (22) are connected by a heat-fitting thread, and then fixed by the set screw (23).

4. The device of claim 3, wherein: The stud (21) and the sleeve (22) are interference fit.

5. The device of claim 1 wherein, The bushing assembly (3) includes a bushing (31), a first carbon crystal ring (32), a positioning sleeve (33) and a first spare cap (34). The bushing (31) is disposed in the ejector channel and is coaxially engaged with the cone rod (12). An annular cavity is formed between the bushing (31) and the tapered rod (12). Two sets of first carbon crystal rings (32) and positioning sleeves (33) are provided in the cavity. The first carbon crystal rings (32) and positioning sleeves (33) are placed at intervals and fixed by a first spare cap (34). The first spare cap (34) is threadedly connected to the bushing (31) and its top surface is flush with the bushing.

6. The device of claim 1 wherein, The sealing assembly (6) includes a flange cover (61), a flange fastener (63), a round nut (64), a second carbon crystal ring (65), a second spare cap (66), a support pad (67), a flexible graphite ring (68), a metal spiral wound gasket (69), a sealing sleeve (610), a sealing gland (611), and a gland fastener (612). The flange cover (61) has a through hole at its central axis and is coaxially fitted with the cone tail (13); the bottom flange of the flange cover (61) fits with the top groove of the ejector chamber end plate (8) and is fixedly connected by flange fasteners (63); the top of the flange cover (61) is connected to the flange of the actuator (7) and is fixed by round nuts (64). The flange cover (61) has a positioning groove at the bottom of the through hole. A second carbon crystal ring (65) and a second spare cap (66) are provided in the positioning groove. The second spare cap (66) is threadedly connected to the flange cover (61) to fix the second carbon crystal ring (65). The flange cover (61) has a sealing groove at the top of the through hole, and multiple flexible graphite rings (68) are provided in the sealing groove. Metal spiral wound gaskets (69) are installed at intervals between the flexible graphite rings (68). The bottom of the metal spiral wound gasket (69) is fixedly connected to the support pad (67), and the top is fixedly connected to the sealing sleeve (610). The sealing sleeve (610) is fitted with a sealing cover (611) on the outside, and the sealing cover (611) is fixedly connected to the flange of the actuator (7) by a cover fastener (612).

7. The device of claim 6, wherein: An annular sealing ring (62) is provided between the flange of the flange cover (61) and the top groove of the ejector chamber end plate (8).

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