Tubular condenser frost scraping mechanism
By designing scraper, traction mechanism and drive mechanism in the tube condenser, automatic defrost of the inner wall of the tube bundle is achieved, solving the problem of frosting in traditional condensers affecting performance, and providing a fast and automatic defrost solution. Reduced the impact on the condensation process.
Patent Information
- Application Number
- CN202420611826.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-28
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-03-28
AI Technical Summary
Traditional tube condensers will have frost after working for a period of time, which will affect the performance of use. The existing defrost methods mainly rely on manual operations, which are complex and cumbersome.
A frosting mechanism including a scraper, a traction mechanism and a driving mechanism is designed. The scraper moves along the axial direction of the tube bundle, moves synchronously with the driving mechanism through the traction line, and the scraper surface comes into contact with the inner wall of the tube bundle, so as to realize automatic defrosting.
It realizes rapid cleaning of the frost inside the tube condenser, and does not need to stop the condenser from running, reducing the impact on the process.
Smart Images
Figure CN222231423U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a tubular condenser cleaning mechanism, in particular to a tubular condenser frost scraping mechanism. Background Art
[0002] The traditional tubular condenser is composed of a shell, several tube bundles, tube sheets, heads and baffles, wherein the tube sheets are installed at both ends of the shell, and the several tube bundles and baffles are arranged inside the shell, the axial direction of the tube bundle is arranged parallel to the axial direction of the shell, and the tube sheets are constructed with tube grooves for the ends of the tube bundle to pass through, and both ends of each tube bundle are connected to the two tube sheets through the tube grooves respectively to achieve fixed installation of the tube bundle, and heads are installed on the sides of the two tube sheets facing away from each other to form a complete fluid flow channel heat exchange channel. After the traditional tubular condenser has been working for a period of time, frost will appear on the inner wall of the tube bundle, which will affect the performance of the condenser, and the defrosting method of the tube bundle in the traditional condenser is mostly still manual defrosting, which is complicated and cumbersome to operate. Therefore, it is necessary to propose a tubular condenser frost scraping mechanism to solve the above problems. Utility Model Content
[0003] The utility model aims to provide a frost scraping mechanism which can quickly clean the frost inside a tube condenser.
[0004] The technical solution adopted by the utility model to solve the above problems is: a tube condenser frost scraping mechanism, comprising:
[0005] The cleaning mechanism comprises a plurality of scraping members, which are arranged in a one-to-one correspondence in a plurality of tube bundles inside the condenser. The scraping members have scraping surfaces and are restricted to move axially along the tube bundle, and the scraping surfaces are in contact with the inner wall of the tube bundle.
[0006] The traction mechanism comprises a traction line, one end of which passes through all the tube bundles in sequence, and the traction line is connected to the scraping members located in each tube bundle to drive each scraping member to move synchronously in the corresponding tube bundle.
[0007] The position of each scraper in the corresponding tube bundle is configured to meet the requirement that when one end of the traction line moves a certain distance, the moving distance of the scraper in each tube bundle is equal to the moving distance of one end of the traction line.
[0008] The driving mechanism comprises two controlled rotating shafts, both of which are provided with wire wheels, and both ends of the traction line are respectively connected to the peripheral sides of the two wire wheels.
[0009] Preferably, the traction mechanism also includes two reversing assemblies, which are respectively arranged at the two ends of the tube bundle in the condenser, and the reversing assembly includes a mounting seat, which is connected to the condenser shell, and the mounting seat has a first plane arranged opposite to the end of the tube bundle, and a plurality of pipe fittings are arranged on the side of the first plane, and a rotatable reversing wheel is provided in each of the pipe fittings, and the rotation plane of the reversing wheel is arranged perpendicular to the first plane.
[0010] Each time one end of the traction line passes through the pipe opening of the pipe bundle, it will go around the reversing wheel in the corresponding pipe member to change the extension direction of the traction line.
[0011] Preferably, a plurality of embedding grooves are constructed along the normal direction on the side of the first plane, and the plurality of embedding grooves correspond to the plurality of pipe fittings one by one. The plurality of pipe fittings are respectively installed inside the plurality of embedding grooves, and a bearing is also provided inside each of the embedding grooves. Each of the pipe fittings is connected to the mounting seat through the corresponding bearing, so that the pipe fitting and the mounting seat can rotate relative to each other, and the rotation plane of each of the pipe fittings is arranged parallel to the first plane.
[0012] Preferably, an annular wire groove is constructed on the circumference of each of the reversing wheels, the traction wire is embedded in the annular wire groove, and the annular wire groove is arranged parallel to the rotation plane of the reversing wheel.
[0013] Preferably, both ends of each tube bundle are provided with limit members to limit the moving area of the scraper in the tube bundle.
[0014] Preferably, the driving mechanism comprises two driving motors, both of which are mounted on the condenser, and the output shafts of the two driving motors are respectively connected to the two rotating shafts to respectively drive the two rotating shafts to rotate.
[0015] Beneficial Effects
[0016] According to the defrost mechanism provided in the embodiment of the utility model, it includes a scraper, a traction mechanism and a driving mechanism. A scraper is arranged in each tube bundle, and each scraper is connected as a whole by a traction line so that the scrapers in each tube bundle can move synchronously. When the driving mechanism pulls the traction line to move, the scrapers in each tube bundle move synchronously, and the scraping surfaces on the circumference of each tube bundle will come into frictional contact with the inner wall of the corresponding tube bundle to scrape off the frost condensed on the inner wall of the tube bundle. In addition, the main part of the defrost mechanism provided in the embodiment of the utility model is located inside the condenser. The condenser does not need to stop running during defrosting, which reduces the impact on the condensation process. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a cross-sectional view of the defrosting mechanism of the tubular condenser in the embodiment of the utility model.
[0018] Figure 2 It is a structural schematic diagram of the relative positions of the scraping members in the two tube bundles after the traction line passes through the two tube bundles continuously in the embodiment of the utility model.
[0019] Figure 3 It is a cross-sectional view of the cleaning mechanism, the traction mechanism and the driving mechanism in the embodiment of the utility model.
[0020] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle.
[0021] Figure 5 It is a structural schematic diagram of the mounting base in the embodiment of the utility model.
[0022] Figure 6 It is a structural schematic diagram of a pipe fitting and a reversing wheel in an embodiment of the utility model.
[0023] Figure 7 It is a schematic structural diagram of the reversing wheel in the embodiment of the utility model.
[0024] Among them: 1. scraper; 2. traction mechanism; 210. traction line; 220. reversing assembly; 221. mounting seat; 2211. first plane; 222. pipe fitting; 223. reversing wheel; 2231. annular wire groove; 3. driving mechanism; 310. rotating shaft; 320. wire wheel; 4. condenser; 410. tube bundle; 420. shell; 5. limiter. DETAILED DESCRIPTION
[0025] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0026] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description created by the present application, unless otherwise specified, "multiple" means two or more.
[0027] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.
[0028] The technical solution of the present application is designed based on the tubular condenser 4. The basic structure of the tubular condenser 4 includes a shell 420. Both ends of the shell 420 are equipped with tube sheets. A number of tube bundles 410 and baffles are arranged inside the shell 420. The axial direction of the tube bundle 410 is arranged parallel to the axial direction of the shell 420. The tube sheet is constructed with a tube groove for the ends of the tube bundle 410 to pass through. Both ends of each tube bundle 410 are respectively installed on two tube sheets through the tube groove, and the two tube sheets are equipped with heads on the sides facing away from each other to form a complete fluid flow channel. After the tubular condenser 4 has been working for a period of time, frost will appear on the inner wall of the tube bundle 410, resulting in the performance of the condenser 4 being affected. In addition, most of the existing defrosting methods require manual defrosting, which is complicated and cumbersome. Therefore, the applicant proposed the solution of the embodiment of the utility model.
[0029] See also Figure 1-3The present embodiment provides a frost scraping mechanism for a tube condenser 4, comprising a cleaning mechanism, a traction mechanism 2 and a driving mechanism 3. The cleaning mechanism comprises a plurality of scraping members 1, which are arranged in a one-to-one correspondence in a plurality of tube bundles 410 inside the condenser 4, and the scraping members 1 have a scraping surface and are restricted to move along the axial direction of the tube bundle 410, and the scraping surface is in contact with the inner wall of the tube bundle 410. The traction mechanism 2 comprises a traction line 210, one end of which passes through all the tube bundles 410 in sequence, and the traction line 210 is connected to the scraping members 1 located in each tube bundle 410 to pull each scraping member 1 to move synchronously in the corresponding tube bundle 410, and the position of each scraping member 1 in the corresponding tube bundle 410 is configured to meet the requirement that when one end of the traction line 210 moves a certain distance, the moving distance of the scraping members 1 in each tube bundle 410 is equal to the moving distance of one end of the traction line 210. The driving mechanism 3 includes two rotating shafts 310 that are controlled to rotate. The two rotating shafts 310 are both provided with wire wheels 320. The two ends of the traction wire 210 are respectively connected to the circumference of the two wire wheels 320. Only one of the two rotating shafts 310 is controlled to rotate at the same time, and the other is in a free state. When one rotating shaft 310 is controlled to rotate, the traction wire 210 is passively wound on the wire wheel 320 of the rotating shaft 310, while the other rotating shaft 310 is driven by the traction wire 210 to complete the wire release. In this process, each scraper 1 connected to the traction wire 210 in each tube bundle 410 will move synchronously along the axial direction of the tube bundle 410. In the process of synchronous movement of each scraper 1, the scraping surface of the scraper 1 will contact the inner wall of the tube bundle 410, thereby scraping off the frost on the inner wall of the tube bundle 410. It should be noted that the length of the traction line 210 wound or released by the wire wheel 320 on the single rotating shaft 310 is approximately equal to the length of the tube bundle 410 .
[0030] For details, please refer to 2. In this embodiment, the scraper 1 is an annular member, which has a concentric inner and outer contours when viewed from a cross section. A fixing rod fixedly connected to the traction line 210 is provided inside the annular member, and the axis of the fixing rod is colinear with the axis of the annular member. In addition, a through groove for the traction line 210 to pass through is constructed at the center of the fixing rod along the axial direction. The traction line 210 is fixed in the through groove by bonding or mechanical connection. A plurality of connecting rods extend from the inner circumference of the annular member toward the direction of the fixing rod to fix the fixing rod to the annular member. It should be noted that the connecting rods and the fixing rod in the annular member will not affect the flowability of the annular member.
[0031] See also Figure 2-3In this embodiment, the tube bundle 410 has two ports along its axial direction, which are defined as a first tube port and a second tube port, respectively. The tube bundles 410 in the shell 420 of the condenser 4 are arranged in parallel in the condenser 4, and both ends of all the tube bundles 410 are provided. The traction line 210 has two ends, which are defined as a first end and a second end respectively. When the traction line 210 passes through each tube bundle 410 in sequence, the following sequence must be followed: the first end of the traction line 210 passes through the interior of the tube bundle 410 from the first tube opening of a tube bundle 410, and is connected to the scraper 1 located in the tube bundle 410, and then passes out from the second tube opening of the tube bundle 410; then, the first end of the traction line 210 passes through the interior of the tube bundle 410 from the second tube opening of the adjacent tube bundle 410, and is connected to the scraper 1 located in the tube bundle 410, and then passes out from the first tube opening of the tube bundle 410; thereafter, the first end of the traction line 210 repeats the above steps in sequence to pass through all the tube bundles 410 and is connected to the scraper 1 in each tube bundle 410; and, the first end of the traction line 210 will eventually pass through the first tube opening or the second tube opening of a tube bundle 410, and at this time, the first end and the second end of the traction line 210 are both located outside the tube bundle 410.
[0032] See also Figure 2 In this embodiment, along the path of the traction line 210 passing through each tube bundle 410, when the first end of the traction line 210 passes through two tube bundles 410 continuously, the scrapers 1 in the two tube bundles 410 are both arranged close to the ends of the tube bundles 410, but the two scrapers 1 are not located at the same end, that is, the scrapers 1 in the two tube bundles 410 are respectively close to the first tube opening and the second tube opening in the corresponding tube bundle 410, so that when the traction line 210 is pulled, the scrapers 1 in each tube bundle 310 can move in the tube bundle 410 under the traction of the traction line 210.
[0033] See also Figure 1 and Figure 3 . In this embodiment, the two rotating shafts 310 are installed inside the shell 420 of the condenser 4, and the rotating shaft 310 is connected to the shell 420 through a bearing so that the rotating shaft 310 can rotate around its own rotation axis, and the driving mechanism 3 also includes two driving motors (not shown in the figure), and the two driving motors are respectively connected to the two rotating shafts 310 in a one-to-one correspondence. When the output shaft of the driving motor is running, it rotates synchronously with the corresponding rotating shaft 310 of the driving motor. The driving motor is selected to have four states of forward rotation, reverse rotation, locking and free rotation, wherein the free state means that the output shaft of the driving motor can rotate freely without restriction, and the locked state means that the driving shaft of the driving motor cannot rotate. In this embodiment, after the output shaft of one driving motor is controlled to rotate (forward rotation or reverse rotation), the other driving motor should be in a free state to cooperate with the release of the traction line 210.
[0034] See also Figure 4 As an optional embodiment, both ends of each tube bundle 410 are installed with a limiter 5 , which is a limiter tube having a hollow structure and will not affect the flow of the fluid in the tube bundle 410 . The limiter tube is plugged into the end of the tube bundle 410 to limit the scraper 1 from being separated from the tube bundle 410 .
[0035] Please participate Figure 3 and Figure 5-7 As an optional embodiment, the traction mechanism 2 further includes two reversing assemblies 220, which are respectively arranged at the two ends of the tube bundle 410 in the condenser 4, and the reversing assembly 220 includes a mounting seat 221, which is connected to the shell 420 of the condenser 4, and the mounting seat 221 has a first plane 2211 arranged opposite to the end of the tube bundle 410, and a plurality of pipe fittings 222 are arranged on the side of the first plane 2211, and each pipe fitting 222 is provided with a rotatable reversing wheel 223, and the rotation plane of the reversing wheel 223 is arranged perpendicular to the first plane 2211. Each time one end of the traction line 210 passes through the pipe opening of the tube bundle 410, it will go around the reversing wheel 223 in the corresponding pipe fitting 222 to change the extension direction of the traction line 210.
[0036] For details, please refer to Figure 5-6 In this embodiment, the mounting seat 221 is a circular plate, and the two mounting seats 221 are arranged at both ends of the tube bundle 410 in a parallel manner. The first plane 2211 is a non-circumferential side surface of the circular plate, and the first planes 2211 of the two mounting seats 221 are arranged to face each other, so that the two first planes 2211 are opposite to the first pipe opening or the second pipe opening of the tube bundle 410. The first plane 2211 is configured with a plurality of embedded grooves (not shown in the figure) along its normal direction, and the plurality of embedded grooves correspond to a plurality of pipe fittings 222 one by one. The plurality of pipe fittings 222 are respectively installed inside the plurality of embedded grooves, and a bearing (not shown in the figure) is also arranged inside each embedded groove. Each pipe fitting 222 is connected to the mounting seat 221 through the bearing in the corresponding embedded groove, so that the pipe fitting 222 can rotate relative to the mounting seat 221, so that the traction line 210 sections in each tube bundle 410 are in a mutually parallel state. The rotation plane of each pipe 222 is arranged parallel to the first plane 2211, and the axial direction of the pipe 222 is arranged perpendicular to the first plane 2211, so that the rotation plane of the reversing wheel 223 in the pipe 222 is perpendicular to the first plane 2211. When the first end of the traction line 210 is passing through each tube bundle 410, the first end of the traction line 210 will pass through the reversing wheel 223 in the corresponding pipe 222 each time after passing through the first pipe opening or the second pipe opening, so as to change the moving direction of the traction line 210 and reduce the friction force when the traction line 210 is pulled, so as to ensure that the traction line 210 can move smoothly along its winding path under the action of the driving mechanism 3.
[0037] See also Figure 7 Each reversing wheel 223 has an annular wire groove 2231 formed around it. The traction wire 210 is embedded in the annular wire groove 2231 . The annular wire groove 2231 is arranged parallel to the rotation plane of the reversing wheel 223 to prevent the traction wire 210 from being separated from the reversing wheel 223 during the pulling process.
[0038] The above contents described in this specification are merely examples of the present utility model. Those skilled in the art of the present utility model may make various modifications or additions to the specific embodiments described, or replace them in similar ways, as long as they do not deviate from the contents of the present utility model specification or exceed the scope defined in the claims, they shall all fall within the protection scope of the present utility model.
Claims
1. A tube condenser defrosting mechanism, characterized in that: include: A cleaning mechanism, the cleaning mechanism comprising a plurality of scraping members, the plurality of scraping members being arranged in a one-to-one correspondence in a plurality of tube bundles inside the condenser, the scraping members having a scraping surface and being restricted to move along the axial direction of the tube bundle, the scraping surface being in contact with the inner wall of the tube bundle; A traction mechanism, wherein the traction mechanism comprises a traction line, one end of which passes through all the tube bundles in sequence, and the traction line is connected to the scraper located in each tube bundle to pull each scraper to move synchronously in the corresponding tube bundle; The position of each scraper in the corresponding tube bundle is configured to satisfy that when one end of the traction line moves a certain distance, the moving distance of the scraper in each tube bundle is equal to the moving distance of one end of the traction line; The driving mechanism comprises two controlled rotating shafts, both of which are provided with wire wheels, and both ends of the traction line are respectively connected to the peripheral sides of the two wire wheels.
2. A tube condenser defrosting mechanism according to claim 1, characterized in that: The traction mechanism further includes two reversing assemblies, which are respectively arranged at the two ends of the tube bundle in the condenser, and the reversing assembly includes a mounting seat, which is connected to the condenser shell, and the mounting seat has a first plane arranged opposite to the end of the tube bundle, and a plurality of pipe fittings are arranged on the side of the first plane, and each of the pipe fittings is provided with a rotatable reversing wheel, and the rotating plane of the reversing wheel is arranged perpendicular to the first plane; Each time one end of the pulling line passes through the pipe opening of the pipe bundle, it will go around the reversing wheel in the corresponding pipe member to change the extending direction of the pulling line.
3. A tube condenser defrosting mechanism according to claim 2, characterized in that: A plurality of embedding grooves are constructed along the normal direction on the side of the first plane, and the embedding grooves correspond to the plurality of pipe fittings one by one. The plurality of pipe fittings are respectively installed inside the embedding grooves, and a bearing is also provided inside each of the embedding grooves. Each of the pipe fittings is connected to the mounting seat through the corresponding bearing, so that the pipe fitting and the mounting seat can rotate relative to each other, and the rotation plane of each of the pipe fittings is arranged parallel to the first plane.
4. A tube condenser defrosting mechanism according to claim 3, characterized in that: An annular wire groove is constructed on the circumference of each of the reversing wheels, the traction wire is embedded in the annular wire groove, and the annular wire groove is arranged parallel to the rotation plane of the reversing wheel.
5. A tube condenser defrosting mechanism according to claim 1 or 4, characterized in that: Limiting pieces are arranged at both ends of each tube bundle to limit the moving area of the scraper in the tube bundle.
6. A tube condenser defrosting mechanism according to claim 5, characterized in that: The driving mechanism comprises two driving motors, both of which are mounted on the condenser, and the output shafts of the two driving motors are respectively connected to the two rotating shafts to respectively drive the two rotating shafts to rotate.