Suction ejector with suction and flushing functions

Abstract

The invention provides a suction ejector with suction and flushing functions, which comprises an ejection pipe, the ejection pipe comprises a side opening outer pipe and a side opening inner pipe which are of a pipe-in-pipe structure, and the side opening directions of the side opening outer pipe and the side opening inner pipe are the same; a cavity between the side opening outer pipe and the side opening inner pipe forms a spraying channel, and an inner cavity of the side opening inner pipe forms a suction channel; the side face of the injection pipe is provided with a side plate used for blocking the injection channel, the side plate is provided with a nozzle communicated with the injection channel, and the outer side of the side opening outer pipe is provided with a suction pipe communicated with the suction channel. The suction ejector with the suction and flushing functions has the advantages that the side opening outer pipe and the side opening inner pipe are provided with the nozzle and the suction channel which face a cleaning target, so that the ejector has the flushing and suction functions, impurities are prevented from blocking the cleaning target due to the flushing effect, and the cleaning operation of a condenser can be efficiently completed.

Description

Technical Field

[0001] The present invention relates to a suction and spray type cleaning device, in particular to a suction and spray cleaning device with suction and washing functions. Background Art

[0002] The condenser is one of the important cold-end equipment in a thermal power plant. After the condenser has been running for a period of time, dirt and microorganisms will adhere to its heat exchange tubes, and shellfish growth and scale problems will occur. Especially in an environment where the condenser circulating water quality is poor, a large amount of aquatic plants, seaweed, straw, plastic and other debris in the condenser circulating water will accumulate on the condenser tube sheet, thereby blocking the heat exchange tubes, resulting in a decrease in the condenser cleanliness factor, poor heat exchange efficiency, increased turbine heat consumption, and increased circulating water resistance. Therefore, cleaning the condenser tube sheet and heat exchange tubes to improve and maintain the cleanliness of the condenser is very important for the safe and economical operation of the generator set.

[0003] At present, in the relevant technical solutions for cleaning condensers and other heat exchange devices with tube sheets and heat exchange tubes, related structures for high-pressure water flow flushing are generally used, such as a shell-and-tube forced circulation evaporator that can be cleaned online disclosed in Chinese utility model patent CN201720643515.2, a low-resistance gas preheater disclosed in Chinese utility model patent CN201821702962.1, and an installation structure for high-pressure water cleaning of a shell-and-tube heat exchanger disclosed in Chinese utility model patent CN202321069966.1; there are also some related technical solutions that use bionic robots combined with high-pressure water flow for flushing, such as an online cleaning robot integrated water chamber structure disclosed in Chinese utility model patent CN202120928913.5, and an online cleaning robot integrated water chamber for a tubular heat exchanger disclosed in Chinese utility model patent CN201621223619.X. In this type of technical solution, the cleaner only has a flushing function. When the tube sheet and the heat exchange tube are blocked with debris, the flushing effect of the cleaning mechanism will flush the debris into the heat exchange tube, causing more serious blockage of the heat exchange tube. Moreover, the cleaner only has a flushing function, and the sewage discharge function generally needs to rely on a sewage pipe far away from the cleaner. Passive sewage discharge can only be achieved by relying on the flow of sewage. The splashing of sewage caused by flushing seriously affects the cleaning effect and efficiency.

[0004] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the invention

[0005] The purpose of the present invention is to address the deficiencies of the prior art and improve the problem that the existing cleaning device will flush debris into the heat exchange tube and cannot actively discharge sewage at the cleaning target. A suction ejector with suction and flushing functions is provided, which has a nozzle and a suction channel facing the cleaning target, so that the ejector has both flushing and suction functions, prevents debris from clogging the cleaning target due to the flushing effect, realizes active suction and sewage discharge at the cleaning target, and can efficiently complete the cleaning operation of the condenser.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: it includes an injection pipe, the injection pipe includes a side-opening outer tube and a side-opening inner tube in a tube-in-tube structure, the side-opening outer tube and the side-opening inner tube are both provided with side openings running through their length directions, and the side openings of the side-opening outer tube and the side-opening inner tube are oriented in the same direction; the cavity between the side-opening outer tube and the side-opening inner tube forms an injection channel, and the inner cavity of the side-opening inner tube forms a suction channel; the side of the injection pipe is provided with a side plate for blocking the injection channel, and injection pipe end plates for blocking the injection channel are provided at both ends of the injection pipe; a nozzle connected to the injection channel is provided on the side plate, and a suction pipe connected to the suction channel is provided on the outside of the side-opening outer tube.

[0007] Based on the above, the side-opening outer tube and the side-opening inner tube are respectively configured as an outer arc plate and an inner arc plate, the outer arc plate and the inner arc plate are coaxially configured, and the radius of the outer arc plate is greater than the radius of the inner arc plate.

[0008] Based on the above, the suction pipe is provided with a through pipe for connecting to the suction channel, the through pipe passes through the side opening outer tube and the side opening inner tube, one end of the through pipe is connected to the suction channel, and the other end of the through pipe is connected to the suction pipe.

[0009] Based on the above, the injection pipe is provided with a connecting joint which connects the injection channel and the suction channel respectively, and the connecting joint includes a coaxially arranged joint outer tube and a joint inner tube, the joint outer tube is connected to the side opening outer tube, the joint inner tube is connected to the side opening inner tube, the cavity between the joint outer tube and the joint inner tube is connected to the injection channel, and the inner cavity of the joint inner tube is connected to the suction channel.

[0010] Based on the above, the connecting joint further includes a side tube, which passes through the joint outer tube and the joint inner tube, one end of the side tube is connected to the joint inner tube, and the other end of the side tube is connected to the suction tube.

[0011] Based on the above, a reinforcing rib is provided on the inner side of the side opening inner tube, and the reinforcing rib is staggered with the through tube and the joint inner tube to prevent the reinforcing rib from hindering suction.

[0012] Based on the above, the through-tubes are symmetrically arranged on both sides of the connecting joint, and one end of the through-tube communicating with the suction pipe is inclined toward the connecting joint.

[0013] Based on the above, the suction pipe is provided with a side opening running through the length direction thereof, and the suction pipe is fixed on the outer wall of the outer tube of the side opening on the sides on both sides of the side opening, one end of the suction pipe is fixed on the outer wall of the outer tube of the joint, and the other end of the suction pipe is blocked by a suction pipe end plate.

[0014] Based on the above, the side opening inner tube is connected to extension plates inclined toward the side opening outer tube on both sides of its side opening, the side plates are connected to the side surfaces of the side opening outer tube and the side surfaces of the extension plates, and the side plates are perpendicular to the direction of the side opening of the side opening inner tube.

[0015] Based on the above, the nozzles are arranged on the side plates at equal intervals along the length direction of the spray pipe, and the two rows of nozzles on the two side plates are staggered.

[0016] Compared with the prior art, the present invention has substantial characteristics and progress. Specifically, the suction ejector with suction and flushing functions of the present invention has the following advantages: an injection channel is formed between the side-opening outer tube and the side-opening inner tube, the inner cavity of the side-opening inner tube forms a suction channel, and the flushing function and the suction function are directed toward the cleaning target at the same time, thereby realizing the flushing function and the suction function that can be performed simultaneously, preventing the cleaning target from being blocked by debris due to the flushing effect, and actively discharging sewage at the cleaning target; the two rows of nozzles are arranged on the two side plates, and the suction channel is arranged between the two rows of nozzles, which not only forms a suction channel with a large suction area and a large internal space, which is conducive to sucking out more impurities, but also the turbulence caused by the flushing function can increase the suction efficiency, thereby realizing active and efficient suction and sewage discharge, preventing excessive splashing of sewage, and increasing the overall cleaning effect and cleaning efficiency.

[0017] At the same time, the side-opening outer tube and the side-opening inner tube are respectively arranged as an outer arc plate and an inner arc plate, so that the injection channel 101 and the suction channel 102 have a smooth and stable arc-shaped channel angle, which is beneficial to enhancing the flushing function and the suction function; the connecting joint is used as a double-channel joint, and the separate supply functions of the cleaning medium and the suction negative pressure are realized under the premise of ensuring the compactness of the overall structure; the symmetrically and inclined through-tubes are also beneficial for the suction negative pressure to cover a larger range in the suction channel; the extension plate is arranged on the side-opening inner tube, which is beneficial to expanding the suction range; the two rows of nozzles arranged in an offset manner can cover a larger range. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention from a front view angle; Figure 2 yes Figure 1 Schematic diagram of the cross-section structure along line AA; Figure 3 yes Figure 1 Schematic diagram of the cross-section structure along line BB; Figure 4 yes Figure 1 Schematic diagram of the cross-sectional structure along the CC line; Figure 5 yes Figure 1 A detailed enlarged schematic diagram of a part of the structure; Figure 6 yes Figure 1 A detailed enlarged schematic diagram of a part of the structure; Figure 7 It is a schematic diagram of the structure of the overall structure of the present invention from a top view angle; Figure 8 yes Figure 7 A detailed enlarged schematic diagram of a part of the structure; Fig. 9 It is a schematic diagram of the structure of the overall structure of the present invention from an upward viewing angle; Fig.10 yes Fig. 9 A detailed enlarged schematic diagram of a part of the structure; In the figure, the reference numerals are: Injection pipe 10, side opening outer pipe 11, side opening inner pipe 12, side plate 13, injection pipe end plate 14, extension plate 15, reinforcing rib plate 16, injection pipe inspection port 17; Injection channel 101, suction channel 102, nozzle mounting hole 103; Suction pipe 20, through pipe 21, side opening suction pipe 22, suction pipe end plate 23, suction pipe inspection flange 24; Connecting joint 30 , joint outer tube 31 , joint inner tube 32 , side tube 33 , support block 34 , flange 35 . DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further described in detail below through specific implementation methods.

[0020] Example 1 like Figure 1-Figure 10As shown in the figure, the suction injector with suction and flushing functions in this embodiment includes an injection pipe 10 and a suction pipe 20. An injection channel 101 and a suction channel 102 are provided inside the injection pipe 10. The injection channel 101 is connected to a nozzle, and the injection channel 101 provides a cleaning medium for the nozzle, enabling the injector in this embodiment to have a flushing function; the suction pipe 20 is connected to the suction channel 102, and the suction pipe 20 is connected to a suction device (such as a negative pressure pump, etc.), and the suction pipe 20 provides a suction function for the suction channel 102, enabling the injector in this embodiment to have a suction function.

[0021] The suction pipe 20 penetrates through the injection pipe 10 from the outside of the injection pipe 10 to communicate with the suction channel 102. In this way, the directions of the flushing function and the suction function can be opposite, and both the flushing function and the suction function act on the target to be cleaned (such as a tube sheet and a heat exchange tube). When cleaning the target to be cleaned (such as a tube sheet and a heat exchange tube), part of the impurities can be sucked to prevent the impurities from blocking the target to be cleaned (such as a heat exchange tube) due to the impact force of the flushing function.

[0022] As Figure 2 As shown in the figure, the injection pipe 10 includes a side-opening outer pipe 11 and a side-opening inner pipe 12 with a pipe-in-pipe structure. The side-opening outer pipe 11 is arranged outside the side-opening inner pipe 12; both the side-opening outer pipe 11 and the side-opening inner pipe 12 are provided with side openings penetrating in the length direction thereof, and the side openings of the side-opening outer pipe 11 and the side-opening inner pipe 12 face the same direction.

[0023] For ease of understanding, the side-opening outer pipe 11 and the side-opening inner pipe 12 can be set as side-opening pipes in the form of, for example, semi-circular pipes, semi-square pipes (including angle-shaped and "U"-shaped), etc. Correspondingly, the cross-sections of the side-opening outer pipe 11 and the side-opening inner pipe 12 can be in the shapes of C, U, or V, etc. (the one shown in the figure is C-shaped). The side-opening outer pipe 11 and the side-opening inner pipe 12 can adopt the same type of side-opening pipes, and the two can select pipe shapes with the same shape but different sizes.

[0024] The cavity between the side-opening outer pipe 11 and the side-opening inner pipe 12 forms the injection channel 101. A side plate 13 for blocking the injection channel 101 is provided on the side of the injection pipe 10, and injection pipe end plates 14 for blocking the injection channel 101 are provided at both ends of the injection pipe 10; in this way, the enclosed space among the side-opening outer pipe 11, the side-opening inner pipe 12, the side plate 13, and the injection pipe end plates 14 forms a relatively closed injection channel 101. The injection channel 101 is connected to a pipe that provides a cleaning medium for the injection channel 101, and a nozzle communicating with the injection channel 101 is provided on the side plate 13, and the cleaning medium sprays out from the nozzle through the injection channel 101.

[0025] The inner cavity of the side opening inner tube 12 forms a suction channel 102, and the outer side of the side opening outer tube 11 is provided with a suction tube 20 connected to the suction channel 102; the suction tube 20 is connected to a suction device (such as a negative pressure pump, etc.), and the suction tube 20 provides the suction channel 102 with the suction negative pressure required for the suction function.

[0026] In the present embodiment, an injection channel 101 is formed between the side-opening outer tube 11 and the side-opening inner tube 12, and the inner cavity of the side-opening inner tube 12 forms a suction channel 102. The flushing function and the suction function are directed toward the cleaning target at the same time, thereby realizing the flushing function and the suction function that can be performed simultaneously, and the sewage can be actively discharged at the cleaning target; the two rows of nozzles are respectively arranged on the two side plates 13, and the suction channel 102 is arranged between the two rows of nozzles, which not only forms a suction channel 102 with a large suction area and a large internal space, which is conducive to sucking out more impurities, but also the turbulence caused by the flushing function can also increase the suction efficiency, thereby realizing active and efficient suction and sewage discharge, preventing excessive splashing of sewage, and increasing the overall cleaning effect and cleaning efficiency.

[0027] Example 2 Based on Example 1, as a preferred embodiment, in this embodiment, as Figure 2 As shown, the side opening outer tube 11 is set as an outer arc plate, and the side opening inner tube 12 is set as an inner arc plate. The radius of the outer arc plate is greater than the radius of the inner arc plate. The outer arc plate is set on the outside of the inner arc plate. The outer arc plate and the inner arc plate are set in the same direction and coaxially, so the outer arc plate and the inner arc plate are symmetrical with an axial section as a symmetry plane.

[0028] In this embodiment, the side-opening outer tube 11 and the side-opening inner tube 12 are respectively set as an outer arc plate and an inner arc plate. The cavity between the outer arc plate and the inner arc plate, namely the injection channel 101, has a smooth and stable arc-shaped channel angle, which is beneficial to the smooth transportation of the cleaning medium in the injection channel 101; at the same time, the inner cavity of the inner arc plate, namely the suction channel 102, has a smooth and stable arc-shaped inner wall, which is beneficial to sucking away more impurities.

[0029] Example 3 Based on Example 1 or Example 2, Figure 4 , Figure 5 , Figure 8As shown, in the present embodiment, the injection pipe 10 is further provided with a connecting joint 30 respectively connecting the injection channel 101 and the suction channel 102, the connecting joint 30 respectively provides a cleaning medium for the injection channel 101 and provides the suction channel 102 with the suction negative pressure required for the suction function; specifically, the connecting joint 30 includes a coaxially arranged joint outer tube 31 and a joint inner tube 32, the joint outer tube 31 is connected to the side opening outer tube 11, the joint inner tube 32 is connected to the side opening inner tube 12, the cavity between the joint outer tube 31 and the joint inner tube 32 is connected to the injection channel 101, and the inner cavity of the joint inner tube 32 is connected to the suction channel 102; at this time, one end of the joint inner tube 32 is connected to the suction channel 102, the joint inner tube 32 directly provides a suction negative pressure for the suction channel 102, so that impurities near the suction channel 102 are directly sucked away from the joint inner tube 32. In this way, the connecting connector 30 serves as a dual-channel connector, the cavity between the connector outer tube 31 and the connector inner tube 32 serves as a channel for connecting the injection channel 101, and the inner cavity of the connector inner tube 32 serves as another channel for connecting the suction channel 102.

[0030] The connecting joint 30 serves as a joint, one end of which connects the injection channel 101 and the suction channel 102, and the other end of the connecting joint 30 is connected to a dual-channel pipeline. Specifically, a flange 35 is provided on the connecting joint outer tube 31 of the connecting joint 30 at one end away from the injection pipe 10, and the outer tube of a dual-channel pipeline is fixedly connected to the flange 35, and the inner tube of the dual-channel pipeline is sealed to the inner tube of the connecting joint 30. The dual-channel pipeline provides cleaning medium and suction negative pressure for the connecting joint 30, so that the connecting joint 30 provides cleaning medium for the injection channel 101 and suction negative pressure for the suction channel 102 respectively.

[0031] Based on the above, a support block 34 is provided between the joint outer tube 31 and the joint inner tube 32, so that the joint outer tube 31 and the joint inner tube 32 can be firmly connected; preferably, the support block 34 is arranged near the flange 35 of the connecting joint 30, so that the connecting joint 30 has a support block 34 at one end provided with the flange 35 to fix the joint outer tube 31 and the joint inner tube 32 together, and the other end of the connecting joint 30 is connected to the side opening outer tube 11 and the side opening inner tube 12, so that both ends of the connecting joint 30 can be relatively fixed.

[0032] like Figure 4 , Figure 5 , Figure 8 As shown, the connecting joint 30 also includes a side tube 33, which passes through the joint outer tube 31 and the joint inner tube 32, one end of the side tube 33 is connected to the joint inner tube 32, and the other end of the side tube 33 is connected to the suction tube 20; in this way, the suction tube 20 can also be connected to the inner cavity of the joint inner tube 32, and the inner cavity of the joint inner tube 32 provides suction negative pressure for the suction tube 20.

[0033] In this embodiment, the connecting joint 30 serves as a dual-channel joint. The cavity between the joint outer tube 31 and the joint inner tube 32 provides a cleaning medium for the injection channel 101. The joint inner tube 32 can directly provide suction negative pressure for the suction channel 102, and can also provide suction negative pressure for the suction channel 102 through the side tube 33 and the suction tube 20. The separate supply functions of the cleaning medium and the suction negative pressure are realized while ensuring the compactness of the overall structure.

[0034] Example 4 Based on Example 3, Figure 1 , Figure 6 , Fig.10 As shown, in the present embodiment, a through tube 21 for connecting to the suction channel 102 is provided on the suction tube 20, the through tube 21 passes through the side opening outer tube 11 and the side opening inner tube 12, one end of the through tube 21 is connected to the suction channel 102, and the other end of the through tube 21 is connected to the suction tube 20; the end of the through tube 21 acts on the suction channel 102, so that the through tube 21 plays a role similar to that of the joint inner tube 32, that is, the through tube 21 provides a suction negative pressure for the suction channel 102, so that impurities near the suction channel 102 are directly sucked away from the through tube 21.

[0035] The through-tube 21 is connected to the suction tube 20, and the suction tube 20 is connected to the inner tube 21 through the side tube 33. The source of the suction negative pressure used for the suction function of the through-tube 21 also comes from the inner cavity of the joint inner tube 32. In this way, the suction device (such as a negative pressure pump or other device) only needs to be connected to the inner tube of the joint 30 through a double-channel pipeline to provide the required suction negative pressure for the entire ejector of the present invention. The suction negative pressure directly provides the suction channel 102 from the joint inner tube 32 and the through-tube 21, so that impurities near the suction channel 102 are directly sucked away from the ends of the joint inner tube 32 and the through-tube 21, and finally converge in the inner cavity of the joint inner tube 32 and be discharged.

[0036] like Figure 1 As shown, the through-tube 21 is symmetrically arranged on both sides of the connecting joint 30, and one end of the through-tube 21 connected to the suction pipe 20 is inclined toward the connecting joint 30, so that the inclined through-tube 21 can act on a larger range in the suction channel 102 to suck impurities in the suction channel 102 in a larger range and prevent larger impurities from being stuck between the through-tube 21 and the suction pipe 20; preferably, the axis of the through-tube 21 forms an angle of 45 degrees with the injection pipe 10; preferably, only two through-tubes 21 are arranged, and the two through-tubes 21 are arranged on both sides of the connecting joint 30. Only two through-tubes 21 are arranged so that the suction negative pressure will not be unable to normally carry out the suction function due to excessive dispersed pressure values.

[0037] In this embodiment, the through tube 21 is directly connected to the suction channel 102 with the joint inner tube 32, providing a suction negative pressure for the suction channel 102, so that impurities near the suction channel 102 are directly sucked away from the through tube 21. The symmetrically and inclined through tubes 21 are conducive to the suction negative pressure covering a larger range within the suction channel 102.

[0038] Example 5 The difference between this embodiment and embodiment 4 is that the direction of the axis of the through-tube 21 is consistent with the direction of the side opening of the side-opening outer tube 11 (rather than being inclined), so that the suction negative pressure at the through-tube 21 can be more concentrated.

[0039] Example 6 Based on Example 3, Example 4 and Example 5, Figure 2 , Fig. 9 , Fig.10 As shown, a reinforcing rib plate 16 is provided on the inner side of the side opening inner tube 12, and the reinforcing rib plate 16 is staggered with the through tube 21 and the joint inner tube 32 to prevent the reinforcing rib plate 16 from hindering suction; the reinforcing rib plate 16 is welded to the inner wall of the side opening inner tube 12 to serve as a support inside the injection pipe 10.

[0040] Example 7 Based on Example 1, Figure 2 As shown, in this embodiment, the side opening inner tube 12 is connected to the extension plates 15 inclined toward the side opening outer tube 11 on both sides of its side opening, and the side plates 13 are connected to the side of the side opening outer tube 11 and the side of the extension plates 15, and the side plates 13 are perpendicular to the direction of the side opening of the side opening inner tube 12. The inclined extension plates 15 gradually tighten the cavity (injection channel 101) between the extension plates 15 and the side opening outer tube 11, which is conducive to the pressure concentration of the injection channel 101 near the side plates 13; the inclined extension plates 15 also gradually expand the inner cavity space (i.e., the suction channel 102) of the side opening inner tube 12, which is conducive to expanding the suction range; the plate surface of the side plates 13 is perpendicular to the direction of the side opening inner tube 12, so that the direction of the nozzle can be easily set to the desired direction.

[0041] Example 8 Based on Example 2, as a preferred embodiment, the difference between this embodiment and Example 7 is that the side opening outer tube 11 in this embodiment is set as an outer arc plate, and the side opening inner tube 12 is set as an inner arc plate. Figure 2As shown, the curvature of the plate surface of the outer arc plate is greater than that of the plate surface of the inner arc plate. Preferably, the curvature of the plate surface of the outer arc plate is set to 185 degrees-200 degrees, and the curvature of the plate surface of the inner arc plate is set to 180 degrees, so that the two side surfaces of the outer arc plate are higher than the two side surfaces of the inner arc plate; as compensation for the height of the side surface of the inner arc plate, the side surface of the inner arc plate is fixedly provided with an extension plate 15 inclined in the direction away from its axis, and the side plate 13 is connected to the extension plate 15 on the side surface of the outer arc plate and the side surface of the inner arc plate, and the side plate 13 is perpendicular to the direction of the inner arc plate; the inclined extension plate 15 gradually tightens the cavity (injection channel 101) between the extension plate 15 and the outer arc plate, which is beneficial to the pressure concentration of the injection channel 101 near the side plate 13; the inclined extension plate 15 also gradually expands the inner cavity space of the inner arc plate (i.e., the suction channel 102), which is beneficial to expand the suction range.

[0042] Example 9 Based on Example 1 and Example 3, Figure 3 , Figure 5 , Figure 6 As shown, similar to the side-opening outer tube 11 and the side-opening inner tube 12, the suction tube 20 is provided with a side opening running through the length direction thereof to form a side-opening suction tube 22. The suction tube 20 comprises a side-opening suction tube 22 and a suction tube end plate 23. The side-opening suction tube 22 is fixed to the outer wall of the side-opening outer tube 11 on the sides on both sides of the side opening, one end of the side-opening suction tube 22 is fixed to the outer wall of the joint outer tube 31, and the other end of the side-opening suction tube 22 is blocked by the suction tube end plate 23.

[0043] Example 10 Based on Example 2 and Example 9, as a preferred embodiment, in this embodiment, if Figure 3 , Figure 5 , Figure 6 As shown, the side opening suction pipe 22 is configured as a suction arc plate, and the two side surfaces of the suction arc plate are fixedly arranged on the outer arc surface of the outer arc plate, the suction pipe end plate 23 blocks one end of the suction arc plate, and the other end of the suction arc plate is fixedly arranged on the outer wall of the joint outer tube 31; for example, the two side surfaces of the suction arc plate are welded to the outer arc plate, one end of the suction arc plate is welded to the outer wall of the joint outer tube 31, a part of the suction pipe end plate 23 is welded to the other end of the suction arc plate, and another part of the suction pipe end plate 23 is welded to the outer arc plate, so that the suction suction pipe 20 and the injection pipe 10 can be fixed together.

[0044] Embodiment 11 Based on Example 10, in this embodiment, the suction pipe 20 also includes a side arc plate, the inner arc surface of the side arc plate is attached to the outer arc surface of the outer arc plate, the two side sides of the side arc plate are fixedly connected to the two side sides of the suction arc plate, and one end of the through-tube 21 penetrates the side arc plate and is fixedly connected to the side arc plate. In this way, the suction pipe 20 does not need to rely on the injection pipe 10 for sealing, and the suction pipe 20 can be independently produced and tested during the production and processing process.

[0045] Example 12 like Figure 3 , Figure 6 , Figure 7 As shown, the suction pipe 20 is also provided with a suction pipe inspection flange 24 to facilitate cleaning out debris blocked in the suction pipe 20 .

[0046] like Figure 3 , Figure 6 As shown, the injection pipe 10 is also provided with an injection pipe inspection port 17, which is arranged on the outer wall of the side opening outer tube 11 close to the two side plates 13. A plurality of injection pipe inspection ports 17 are arranged on the side opening outer tube 11. When the machine is shut down for inspection and maintenance, one of the injection pipe inspection ports 17 is connected to a high-pressure water source, and the debris in the injection channel 101 will be ejected from the other injection pipe inspection ports 17 along with the high-pressure water, thereby completing the inspection and cleaning of the injection channel 101.

[0047] Embodiment 13 like Figure 4 , Fig.10 As shown, the nozzle is arranged on the nozzle mounting hole 103 on the side plate 13. For example, the nozzle mounting hole 103 can be arranged as a threaded hole, and the nozzle is mounted on the nozzle mounting hole 103 by threaded connection.

[0048] like Fig.10 As shown, the nozzles are arranged at equal intervals on the side plate 13 along the length direction of the injection pipe 10, and the two rows of nozzles on the two side plates 13 are staggered; the two rows of nozzles arranged staggered enable the nozzles to cover a larger range when the injector of the present invention moves along a straight line perpendicular to the length direction of the injector, or when the injector of the present invention rotates; further, when the condenser heat exchange tubes serving as the cleaning target are distributed in an equilateral triangle (that is, the heat exchange tubes of two adjacent rows are also staggered), the injector of the present invention moves along a straight line perpendicular to the length direction of the injector, so that a row of nozzles can flush a row of heat exchange tubes, making the flushing more comprehensive.

[0049] In combination with the above embodiments, the suction injector with suction and flushing functions of the present invention provides a cleaning medium for the injection channel 101 and a suction negative pressure for the suction channel 102 through the connecting joint 30, and can perform flushing and suction at the same time, preventing debris from clogging the cleaning target due to the flushing effect, and can actively discharge sewage at the cleaning target; the suction function also realizes active and efficient suction and sewage discharge, prevents excessive splashing of sewage, and increases the overall cleaning effect and cleaning efficiency; moreover, the side-opening outer tube 11 and the side-opening inner tube 12 are respectively set as outer arc plates and inner arc plates, so that the injection channel 101 and the suction channel 102 have a smooth and stable arc-shaped channel angle, which is beneficial to enhancing the flushing function and the suction function; in addition, the two rows of nozzles arranged in an offset manner can expand the flushing range, and the symmetrically and inclined through-tubes 21 and the extension plate 15 arranged on the side-opening inner tube are also beneficial to expanding the suction range.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A suction ejector with suction and flushing functions, characterized in that: The invention comprises an injection pipe (10), wherein the injection pipe (10) comprises a side-opening outer pipe (11) and a side-opening inner pipe (12) in a pipe-in-pipe structure, wherein the side-opening outer pipe (11) and the side-opening inner pipe (12) are both provided with side openings running through the length direction thereof, and the side openings of the side-opening outer pipe (11) and the side-opening inner pipe (12) are oriented in the same direction; a cavity between the side-opening outer pipe (11) and the side-opening inner pipe (12) forms an injection channel (101), and the side-opening The inner cavity of the inner tube (12) forms a suction channel (102); a side plate (13) for blocking the injection channel (101) is provided on the side of the injection tube (10); injection tube end plates (14) for blocking the injection channel (101) are provided at both ends of the injection tube (10); a nozzle connected to the injection channel (101) is provided on the side plate (13); and a suction tube (20) connected to the suction channel (102) is provided on the outer side of the side opening outer tube (11).

2. The suction ejector with suction and flushing functions according to claim 1, characterized in that: The side-opening outer tube (11) and the side-opening inner tube (12) are respectively arranged as an outer arc plate and an inner arc plate, the outer arc plate and the inner arc plate are arranged coaxially, and the radius of the outer arc plate is greater than the radius of the inner arc plate.

3. The suction ejector with suction and flushing functions according to claim 1 or 2, characterized in that: The suction pipe (20) is provided with a through pipe (21) for communicating with the suction channel (102); the through pipe (21) passes through the side-opening outer pipe (11) and the side-opening inner pipe (12); one end of the through pipe (21) is communicated with the suction channel (102), and the other end of the through pipe (21) is communicated with the suction pipe (20).

4. The suction ejector with suction and flushing functions according to claim 3, characterized in that: The injection pipe (10) is provided with a connecting joint (30) which is respectively connected to the injection channel (101) and the suction channel (102); the connecting joint (30) comprises a coaxially arranged joint outer tube (31) and a joint inner tube (32); the joint outer tube (31) is connected to the side opening outer tube (11); the joint inner tube (32) is connected to the side opening inner tube (12); a cavity between the joint outer tube (31) and the joint inner tube (32) is connected to the injection channel (101); and an inner cavity of the joint inner tube (32) is connected to the suction channel (102).

5. The suction ejector with suction and flushing functions according to claim 4, characterized in that: The connecting joint (30) further comprises a side tube (33), wherein the side tube (33) passes through the joint outer tube (31) and the joint inner tube (32), one end of the side tube (33) is in communication with the joint inner tube (32), and the other end of the side tube (33) is in communication with the suction tube (20).

6. The suction ejector with suction and flushing functions according to claim 4, characterized in that: A reinforcing rib plate (16) is provided on the inner side of the side opening inner tube (12), and the reinforcing rib plate (16) is staggered with the through tube (21) and the joint inner tube (32) to prevent the reinforcing rib plate (16) from obstructing suction.

7. The suction ejector with suction and flushing functions according to claim 4, characterized in that: The through-tube (21) is symmetrically arranged on both sides of the connecting joint (30), and one end of the through-tube (21) communicating with the suction pipe (20) is inclined toward the connecting joint (30).

8. The suction ejector with suction and flushing functions according to claim 4, characterized in that: The suction pipe (20) is provided with a side opening extending through the length direction thereof; the suction pipe (20) is fixedly mounted on the outer wall of the side opening outer tube (11) at the sides of both sides of the side opening; one end of the suction pipe (20) is fixedly mounted on the outer wall of the joint outer tube (31); and the other end of the suction pipe (20) is blocked by a suction pipe end plate (23).

9. The suction ejector with suction and flushing functions according to claim 1 or 2, characterized in that: The side opening inner tube (12) is connected to extension plates (15) inclined toward the side opening outer tube (11) on both sides of its side opening, the side plates (13) are connected to the side surfaces of the side opening outer tube (11) and the side surfaces of the extension plates (15), and the side plates (13) are perpendicular to the direction of the side opening of the side opening inner tube (12).

10. The suction ejector with suction and flushing functions according to claim 1 or 2, characterized in that: The nozzles are arranged on the side plates (13) at equal intervals along the length direction of the spray pipe (10), and the two rows of nozzles on the two side plates (13) are arranged in a staggered manner.

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