Injector guide

Abstract

The application relates to an injector guide device, which comprises a frame body and a guide rail, the frame body comprising: a guide frame base in a U-shaped frame structure, the guide rail being arranged inside the guide frame base; a guide frame cover plate being detachably arranged at an opening of the guide frame base, a guide frame lining plate being arranged on the outer wall of the side of the guide frame base away from the guide frame cover plate, the guide frame lining plate being used for connecting a female pipe of an injector; the middle part of the frame on the two sides of the guide frame base being telescopically provided with symmetrical guide wheel frames, a guide wheel being movably arranged on one end of the guide wheel frame close to the guide rail; the middle part of the guide frame cover plate and the guide frame lining plate being provided with telescopic tightening members, the two tightening members being oppositely arranged and abutting against the guide rail. According to the application, the two oppositely arranged guide wheels and the two oppositely arranged tightening members are arranged in the frame body, the guide rail can be clamped from four mutually perpendicular directions, the tightening members provide the frame body with guidance along the axial direction of the guide wheels, and the service life and working effect are improved.

Description

Technical Field

[0001] This application relates to the field of injectors for condenser cleaning, and in particular to an injector guiding device. Background Technology

[0002] A condenser is a device used in thermal power plants or nuclear power plants to condense exhaust steam from steam turbines. It consists of many heat exchange tubes. After long-term operation, scale will build up on the inner walls of the heat exchange tubes, affecting heat exchange efficiency. Current technology often uses cleaning robots for cleaning. The condenser cleaning robot is located in the water chamber of the condenser and includes an ejector, a drive unit, and a guide unit. The ejector uses a main tube with rows of nozzles. The drive unit moves the ejector so that the nozzles flush the heat exchange tubes row by row. The main tube is usually mounted on a drive screw, and the reciprocating motion of the drive screw, driven by a motor, achieves the up-and-down reciprocating motion of the main tube, thus cleaning the heat exchange tubes.

[0003] The applicant's recent patent application, CN202322815518.8, relates to a support component and a condenser cleaning device. This technology utilizes a support component with a certain degree of freedom to prevent jamming caused by slight lateral swaying of the nozzle header during movement. However, the pressure distribution within the condenser water chamber is highly complex. The ejector header is subjected to radial and circumferential forces during actual operation, which the connecting seat cannot adequately handle using only a wheel-rail connection. Over time, this can lead to deformation and breakage of the connecting seat and support components, and even serious problems such as derailment. Utility Model Content

[0004] Therefore, it is necessary to provide an injector guiding device to address the fact that traditional injectors and connecting seats, relying solely on wheel-rail cooperation, are unable to cope with the radial and circumferential forces they experience during actual operation. Over the long term, this can lead to deformation and breakage of the connecting seat body and support components, and may even cause serious problems such as derailment.

[0005] According to one aspect of this application, an injector guiding device is provided, including a frame and a guide rail, the guide rail being disposed through the interior of the frame; the frame includes: a guide frame base, the guide frame base having a U-shaped frame structure, the guide rail being located inside the guide frame base; a guide frame cover plate, the guide frame cover plate being detachably installed at the opening of the guide frame base, the guide frame base and the guide frame cover plate forming a rectangular frame structure of the frame; and a guide frame liner plate, the guide frame liner plate being installed on the outer wall of the guide frame base on the side opposite to the guide frame cover plate, the guide frame... The liner is used to connect the main pipe of the injector; symmetrical guide wheel frames are telescopically installed in the middle of the two side frames of the guide frame base, and guide wheels are movably installed at one end of the guide wheel frame near the guide rail, with both guide wheels abutting against the guide rail; telescopic clamping members are installed in the middle of the guide frame cover plate and the guide frame liner plate, with the clamping members on both sides arranged opposite to each other and abutting against the guide rail; adjacent guide wheels and clamping members are arranged perpendicularly, and when the frame moves along the direction of the guide rail through the oppositely arranged guide wheels, the clamping members provide radial preload to the frame.

[0006] In one embodiment, symmetrical spring sleeves are fixedly installed in the middle of the two side frames of the guide frame base, and one end of the guide wheel frame away from the guide rail is movably disposed in the spring sleeve. A spring set screw is also installed at the outer end of the spring sleeve.

[0007] In one embodiment, a guide wheel shaft is provided at one end of the guide wheel frame near the guide rail, and the guide wheel is rotatably mounted on the guide wheel frame via the guide wheel shaft; a damping groove is provided on the inner wall of the guide frame cover plate and the guide frame base on the corresponding side, and the two ends of the guide wheel shaft are slidably mounted in the damping groove.

[0008] In one embodiment, the clamping member further includes a spring clamping cover, and a flange structure spring cover is installed on the inner wall of the guide frame liner and the guide frame cover. One set of the spring clamping covers is movably installed on the inner wall of the guide frame liner through the corresponding spring cover, and the other set of the spring clamping covers is movably installed on the guide frame cover through the corresponding spring cover.

[0009] In one embodiment, the pressing surface of the spring pressing cover is an arc surface, and the pressing surface is located on the side of the spring pressing cover facing the guide rail, and the pressing surface protrudes on the side facing the guide rail.

[0010] In one embodiment, a circular groove is provided on the inner wall of the guide frame base near the guide frame liner for the tightening member to pass through.

[0011] In one embodiment, a first elastic element is provided between the spring sleeve and the spring set screw, and a second elastic element is provided in the inner cavity of the spring pressing cover to abut against the inner wall of the guide frame liner.

[0012] In one embodiment, the guide wheel is a shuttle-shaped guide wheel, the guide rail is a cylindrical track, and the side wall of the guide rail is provided with double-row slotted guide grooves, and the guide wheel reciprocates along the guide grooves.

[0013] In one embodiment, the spring cap is connected to the guide frame cover and the guide frame liner by a first bolt.

[0014] In one embodiment, extension plates are provided on both sides of the bottom plate of the guide frame base, and the guide frame liner is connected to the extension plates by a second bolt.

[0015] This application has the following beneficial effects:

[0016] 1. This application, by setting two oppositely arranged guide wheels and two oppositely arranged clamping members within the frame, can clamp the guide rail from four mutually perpendicular directions, allowing the clamping members to provide guidance to the frame along the axial direction of the guide wheels. When the pressure from the injector main pipe is transmitted to the frame and converted into axial pressure on the guide wheels, the two clamping members can transmit the compressive force from both sides of the guide wheels to the guide rail, thereby sharing some of the axial force on the guide wheels. This avoids relying solely on the wheel-rail fit between the guide wheels and the guide rail to cope with the pressure from the main pipe, effectively preventing potential deformation of the frame, guide wheels, and related connecting parts, as well as guide wheel derailment, or even serious problems such as breakage of the frame, guide wheels, and related connecting parts. This design improves the service life and working efficiency of the entire injector guiding device.

[0017] 2. The overall frame structure of this application remains compact, and the clamping components do not excessively occupy the internal space of the frame. This design allows the frame to withstand greater pressure and prevents deformation. The clamping components are elastically connected to the frame, which can more effectively cope with the long-term pressure from the ejector main pipe. The guide wheels are also designed to be elastically connected to the frame, which can effectively prevent the ends of the ejector main pipe from tilting, making the condenser cleaning robot operate more smoothly. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the overall structure of an embodiment of this application.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Frame; 11. Guide frame liner; 12. Vibration damping groove; 13. Guide frame base; 14. Guide frame cover; 2. Guide rail; 3. Guide wheel; 31. Guide wheel shaft; 32. Guide wheel bracket; 33. Spring sleeve; 34. Spring set screw; 35. First elastic element; 4. Tightening element; 41. Spring pressure cover; 42. Spring tightening cover; 43. Second elastic element; 5. Circular groove; 6. First bolt; 7. Second bolt; 8. Guide groove. Detailed Implementation

[0021] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0022] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0023] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0024] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0025] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0027] See Figure 1 , Figure 1This application shows a cross-sectional view of the overall structure of an injector guide device according to an embodiment of the present application, including a frame 1 and a guide rail 2. The guide rail 2 is characterized by being disposed through the interior of the frame 1. The frame 1 includes: a guide frame base 13, which is a U-shaped frame structure, with the guide rail 2 located inside the guide frame base 13; a guide frame cover plate 14, which is detachably installed at the opening of the guide frame base 13, and the guide frame base 13 and the guide frame cover plate 14 form a rectangular frame structure of the frame 1; and a guide frame liner plate 11, which is installed on the side of the guide frame base 13 opposite to the guide frame cover plate 14. On the wall, the guide frame liner 11 is used to connect the main pipe of the injector; symmetrical guide wheel frames 32 are telescopically installed in the middle of the two side frames of the guide frame base 13, and guide wheels 3 are movably installed at the end of the guide wheel frame 32 near the guide rail 2, and the guide wheels 3 on both sides abut against the guide rail 2; telescopic clamping members 4 are installed in the middle of the guide frame cover plate 14 and the guide frame liner 11, and the clamping members 4 on both sides are arranged opposite to each other and abut against the guide rail 2; the adjacent guide wheels 3 and clamping members 4 are arranged vertically, and when the frame 1 moves along the direction of the guide rail 2 through the oppositely arranged guide wheels 3, the clamping members 4 provide radial preload to the frame 1.

[0028] During operation, the device features two opposing guide wheels 3 and two opposing clamping members 4 within the frame 1, which clamp the guide rail 2 from four mutually perpendicular directions. The two guide wheels 3 allow the frame 1 to slide relative to the guide rail 2 and provide clamping force at multiple points along the axial direction of the injector main tube, preventing the injector main tube from moving along the guide rail 2 and shifting laterally, thus avoiding asynchronous travel at the left and right ends of the injector main tube and ensuring smooth and stable movement. The clamping members 4 provide guidance to the frame 1 along the axial direction of the guide wheels 3 and provide clamping force at multiple points along the radial direction of the injector main tube. The two clamping members 4 transmit pressure to the guide rail 2 from both sides of the guide wheels 3, thereby sharing some of the axial force with the guide wheels 3. This allows the frame 1 to effectively cope with the radial and circumferential forces from the main tube, effectively preventing potential deformation of the frame 1, guide wheels 3, and related connecting parts, or even serious problems such as breakage of related connecting parts.

[0029] Symmetrical spring sleeves 33 are fixedly installed in the middle of the two side frames of the guide frame base 13. The end of the guide wheel frame 32 away from the guide rail 2 is movably set in the spring sleeve 33. A spring set screw 34 is also installed at the outer end of the spring sleeve 33.

[0030] In some embodiments, the spring set screw 34 is used to limit the first elastic element 35 inside the spring sleeve 33, and when the radial force and circumferential force of the injector main tube are transmitted to the frame 1, they are converted into the axial force of the guide wheel 3.

[0031] A guide wheel shaft 31 is provided at one end of the guide wheel frame 32 near the guide rail 2. The guide wheel 3 is rotatably mounted on the guide wheel frame 32 via the guide wheel shaft 31. A damping groove 12 is provided on the inner wall of the guide frame cover plate 14 and the guide frame base 13 on the corresponding side. The two ends of the guide wheel shaft 31 are slidably mounted in the damping groove 12.

[0032] In some embodiments, the guide wheel 3 is rotatably mounted on the guide wheel shaft 31, and a guide wheel copper sleeve is provided on the guide wheel shaft 31. The guide wheel copper sleeve can be fixed to the outer wall of the guide wheel shaft 31 by interference fit or snap ring limiting, and the guide wheel 3 is rotatably mounted on the guide wheel copper sleeve. The rotation structure of the guide wheel copper sleeve makes the overall structure of the guide wheel 3 simple, low-cost and impact-resistant, so that the device is suitable for low-speed ejector main tube movement scenarios.

[0033] Since the axial pressure of the guide wheel shaft 31 usually comes from the injector main tube, there is a gap between the end of the guide wheel shaft 31 facing the guide frame liner 11 and the frame 1, so as to avoid the guide wheel shaft 31 being bent or deformed when subjected to the pressure of the injector main tube.

[0034] The guide wheel 3 is rotatably mounted on the guide wheel shaft 31. Both ends of the guide wheel shaft 31 are slidably positioned within the damping grooves 12 formed on the inner wall of the frame 1 to limit the stroke of the guide wheel 3. The gap between the guide wheel shaft 31 and the inner wall of the frame 1 can be provided within the damping grooves 12. The damping grooves 12 limit the stroke of the guide wheel 3, ensuring that the guide wheel 3 can only slide along the axial direction of the injector main tube. This design also allows for a more concentrated clamping force of the guide wheel 3 on the guide rail 2, effectively preventing asynchronous strokes at the left and right ends of the main tube and effectively correcting the shape of the main tube.

[0035] The clamping component 4 also includes a spring clamping cover 42. A flange-structured spring cover 41 is installed on the inner wall of the guide frame liner 11 and the guide frame cover 14. One set of spring clamping covers 42 is movably installed on the inner wall of the guide frame liner 11 through the corresponding spring cover 41, and the other set of spring clamping covers 42 is movably installed on the guide frame cover 14 through the corresponding spring cover 41.

[0036] In some embodiments, the spring cover 41 with a flange structure limits the movement of the spring-loaded cover 42 to prevent it from accidentally falling off during reciprocating motion.

[0037] The clamping surface of the spring clamping cover 42 is an arc surface, and the clamping surface is located on the side of the spring clamping cover 42 facing the guide rail 2. The clamping surface is protruding on the side facing the guide rail 2.

[0038] In some embodiments, in order to reduce the contact area between the clamping member 4 and the guide rail 2, the clamping surface of the spring clamping cover 42 can adopt an arc surface structure.

[0039] In some embodiments, the spring-loaded cover 42 of the clamping member 4 may also be configured as a spindle-shaped structure similar to that of the guide wheel 3.

[0040] A circular groove 5 for the clamping member 4 to pass through is provided on the inner wall of the guide frame base 13 near the guide frame liner 11.

[0041] In some embodiments, in order to save the internal space of the frame 1 and to more directly cope with the pressure from the injector main pipe, a set of clamping members 4 are installed on the inner wall of the guide frame liner 11. In order to avoid the guide frame base 13 interfering with it during telescopic movement, a circular groove 5 structure is provided.

[0042] An O-ring is provided between the spring top cover 42 and the spring pressure cover 41, and an O-ring is also provided between the spring pressure cover 41 and the circular groove 5. This design is to prevent water from entering the inside of the spring top cover 42 and affecting the rebound of the second elastic element 43.

[0043] A first elastic element 35 is provided between the spring sleeve 33 and the spring set screw 34, and a second elastic element 43 is provided in the inner cavity of the spring tightening cover 42 to abut against the inner wall of the guide frame liner 11.

[0044] In some embodiments, during operation, the frame 1 is subjected to compressive forces from various directions via the injector header. When the two side frames of the guide frame base 13 are subjected to compressive forces, the first elastic element 35 within the spring sleeve 33 dampens the force along the direction of the spring sleeve 33. When the guide frame liner 11 or the guide frame cover 14 is subjected to compressive forces, the second elastic element 43 dampens the force along the direction of the spring-loaded cover 42.

[0045] The overall structure of the frame 1 remains compact. One set of clamping members 4 is installed on the guide frame liner 11, so it does not occupy too much space inside the frame 1. This design ensures that the frame 1 can withstand greater pressure and prevents deformation. The clamping members 4 are elastically connected to the guide frame liner 11 and the guide frame cover 14, which can more effectively cope with the long-term pressure from the injector main pipe and prevent the frame 1 from deforming. In addition, the guide wheel 3 is elastically connected to the frame 1, which can effectively prevent the two ends of the injector main pipe from tilting.

[0046] The guide wheel 3 is a shuttle-shaped guide wheel, and the guide rail 2 is a cylindrical track. The guide rail 2 has a double-row slotted guide groove 8 on its side wall, and the guide wheel 3 reciprocates along the guide groove 8.

[0047] In some embodiments, the fit between the guide groove 8 and the shuttle-shaped structure is tighter, so that the wheel-rail fit between the guide wheel 3 and the guide rail 2 can cope with more pressure from the injector header, thus preventing the guide wheel 3 from accidentally derailing.

[0048] The spring cover 41 is connected to the guide frame cover plate 14 and the guide frame liner plate 11 by the first bolt 6.

[0049] In some embodiments, since the clamping member 4 is integrally mounted on the inner wall of the guide frame liner 11, and the spring clamping cover 42 is telescopic relative to the spring cover 41, a first bolt 6 structure is designed to fix the spring cover 41 to the guide frame liner 11.

[0050] The guide frame base 13 has extension plates on both sides of the base plate, and the guide frame liner 11 is connected to the extension plates by the second bolt 7.

[0051] In some embodiments, during operation, the main pipe connecting the injector is mounted on the guide frame liner 11. In order to install the guide frame liner 11 onto the outer wall of the guide frame base 13, the guide frame liner 11 is connected to the extension plate by the second bolt 7.

[0052] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A jet guide device, comprising a frame (1) and a guide rail (2), characterized in that, The guide rail (2) extends through the interior of the frame (1); the frame (1) includes: The guide frame base (13) is a U-shaped frame structure, and the guide rail (2) is located inside the guide frame base (13). The guide frame cover plate (14) is detachably installed at the opening of the guide frame base (13). The guide frame base (13) and the guide frame cover plate (14) together form the rectangular frame structure of the frame (1). Guide frame liner (11), the guide frame liner (11) is installed on the outer wall of the guide frame base (13) on the side away from the guide frame cover plate (14), the guide frame liner (11) is used to connect the main pipe of the injector; Symmetrical guide wheel frames (32) are telescopically installed in the middle of the two side frames of the guide frame base (13). Guide wheels (3) are movably installed at one end of the guide wheel frame (32) near the guide rail (2). The guide wheels (3) on both sides abut against the guide rail (2). The guide frame cover plate (14) and the guide frame liner plate (11) are equipped with retractable clamping members (4) in the middle, and the clamping members (4) on both sides are arranged opposite to each other and abut against the guide rail (2). The adjacent guide wheels (3) and the clamping member (4) are arranged vertically. When the frame (1) moves along the direction of the guide rail (2) via the relatively arranged guide wheels (3), the clamping member (4) provides radial preload to the frame (1).

2. The injector guiding device according to claim 1, characterized in that, Symmetrical spring sleeves (33) are fixedly installed in the middle of the two side frames of the guide frame base (13). The end of the guide wheel frame (32) away from the guide rail (2) is movably set in the spring sleeve (33). A spring set screw (34) is also installed at the outer end of the spring sleeve (33).

3. The injector guiding device according to claim 1, characterized in that, The guide wheel frame (32) is provided with a guide wheel shaft (31) at one end near the guide rail (2), and the guide wheel (3) is rotatably mounted on the guide wheel frame (32) through the guide wheel shaft (31); Shock-absorbing grooves (12) are provided on the inner wall of the guide frame base (13) on the side corresponding to the guide frame cover plate (14) and on the inner wall of the guide frame cover plate (14). The two ends of the guide wheel shaft (31) are slidably disposed in the shock-absorbing grooves (12).

4. The injector guiding device according to claim 2, characterized in that, The clamping member (4) also includes a spring clamping cover (42), and spring covers (41) with flange structures are installed on the inner walls of the guide frame liner (11) and the guide frame cover (14). One set of spring-loaded covers (42) is movably mounted on the inner wall of the guide frame liner (11) via the corresponding spring-loaded covers (41), and the other set of spring-loaded covers (42) is movably mounted on the guide frame cover plate (14) via the corresponding spring-loaded covers (41).

5. The injector guiding device according to claim 4, characterized in that, The pressing surface of the spring pressing cover (42) is an arc surface. The pressing surface is located on the side of the spring pressing cover (42) facing the guide rail (2). The pressing surface protrudes from the side of the guide rail (2).

6. The injector guiding device according to any one of claims 1-5, characterized in that, The inner wall of the guide frame base (13) near the guide frame liner (11) has a circular groove through which the top clamping member (4) passes.

7. The injector guiding device according to claim 4, characterized in that, A first elastic element (35) is provided between the spring sleeve (33) and the spring set screw (34), and a second elastic element (43) is provided in the inner cavity of the spring pressing cover to abut against the inner wall of the guide frame liner (11).

8. The injector guiding device according to claim 1, characterized in that, The guide wheel (3) is a shuttle-shaped guide wheel, the guide rail (2) is a cylindrical track, and the guide rail (2) has a double-row slotted guide groove (8) on its side wall. The guide wheel (3) moves back and forth along the guide groove (8).

9. The injector guide device according to claim 4, characterized in that, The spring cap (41) is connected to the guide frame cover plate (14) and the guide frame liner plate (11) by the first bolt (6).

10. The injector guiding device according to claim 1, characterized in that, The guide frame base (13) has extension plates on both sides of the base plate, and the guide frame liner (11) is connected to the extension plates by the second bolt (7).

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