Rotary mechanical arm for conveying fluid

Abstract

The utility model provides a rotating mechanical arm for conveying fluid, and belongs to the technical field of industrial heat exchanger cleaning. The rotating mechanical arm used for conveying fluid comprises at least two conveying pipelines and a plurality of rotating joints connected to the two ends of the conveying pipelines, every two adjacent conveying pipelines are connected through one rotating joint, and the axes of every two adjacent conveying pipelines are perpendicular to the rotating joints. The rotating joint comprises a rotating guide pipe, two rotating bearings arranged on the outer wall of the rotating guide pipe in a sleeving mode and an outer cylinder matched with outer rings of the rotating bearings, the rotating guide pipe is provided with a first port communicated with the conveying pipeline and a second port located in the outer cylinder, and the outer cylinder is provided with a third port communicated with the conveying pipeline. And a sealing structure for sealing the second port and the inner wall of the outer cylinder body is arranged in the outer cylinder body. According to the utility model, cleaning fluid can be supplied to the horizontally-moving cleaning mechanism, the system stability is high, and the problems of jamming, abrasion and swinging are not easy to occur.

Description

Technical Field

[0001] The utility model relates to a rotating mechanical arm for conveying fluid, belonging to the technical field of industrial heat exchanger cleaning. Background Art

[0002] A heat exchanger is an energy-saving device that transfers heat between two or more fluids at different temperatures, transferring heat from a higher temperature fluid to a lower temperature fluid to meet the needs of process conditions. Since the circulating water of the heat exchanger contains a large amount of minerals and organic matter, dirt accumulates on the inner wall of the heat exchanger, and the thicker the accumulated dirt, the lower the heat exchange efficiency of the heat exchanger. Therefore, the heat exchanger needs to be cleaned to improve its heat exchange efficiency.

[0003] At present, the traditional manual high-pressure water washing cleaning method mainly relies on manpower and has low cleaning efficiency. Some power plants use a rubber ball cleaning system to clean the heat exchanger. A certain proportion of rubber balls are placed in the circulating water, so that the rubber balls enter the heat exchanger with the circulating water and use friction to clean the inner wall of the heat exchanger. The rubber ball cleaning system can moderately clean the inner wall of the heat exchanger, but there are problems such as low ball collection rate, uneven cleaning, and complex system.

[0004] In order to improve the cleaning efficiency and coverage of the heat exchanger, an online automatic cleaning device that uses a cleaning mechanism to accurately position the heat exchanger and performs row-by-row and comprehensive cleaning of the heat exchanger has gradually been developed and applied in China. However, the delivery pipeline that supplies the cleaning liquid to the cleaning mechanism will move with the translation of the cleaning mechanism. The delivery pipeline in the prior art is generally a high-pressure hose, which is prone to getting stuck, wearing, and swinging when the device is working.

[0005] In order to solve the above problems, people have been seeking an ideal technical solution. Utility Model Content

[0006] The purpose of the utility model is to address the deficiencies of the prior art and to provide a rotating mechanical arm for conveying fluid, which can supply cleaning liquid to a translational cleaning mechanism, has high system stability, and is not prone to problems such as jamming, wear and swinging.

[0007] In order to achieve the above-mentioned purpose, the technical solution of the rotating mechanical arm for conveying fluid provided by the utility model is:

[0008] A rotating mechanical arm for conveying fluids comprises at least two conveying pipes and a plurality of rotating joints connected at both ends of the conveying pipes, wherein two adjacent conveying pipes are connected via a rotating joint, and the axes of the two adjacent conveying pipes are perpendicular to the rotating joint, and the rotating joint comprises a rotating conduit, two rotating bearings sleeved on the outer wall of the rotating conduit, and an outer cylinder body matched with the outer ring of the rotating bearing, the rotating conduit having a first port connected to the conveying pipe and a second port located in the outer cylinder body, the outer cylinder body having a third port connected to the conveying pipe, and a sealing structure for sealing the second port with the inner wall of the outer cylinder body is arranged in the outer cylinder body.

[0009] Furthermore, the inner wall of the outer cylinder is in a double-step columnar shape, so that the inner wall of the outer cylinder has a small diameter section, a middle diameter section for installing a sealing structure, and a large diameter section for installing a rotating bearing. The small diameter section has a third port connected to the conveying pipeline, and a first step surface is formed between the small diameter section and the middle diameter section, and the sealing structure is arranged between the first step surface and the second port.

[0010] Furthermore, the sealing structure comprises a sealing ring and a damping mechanism for squeezing the sealing ring, the damping mechanism is mounted on the first step surface, and two end surfaces of the sealing ring are in contact with the damping mechanism at the second port respectively.

[0011] Furthermore, the damping mechanism includes a damping column arranged on a step surface and an elastic member sleeved on the damping column.

[0012] Furthermore, the elastic member is a spring.

[0013] Furthermore, a second step surface is formed between the middle diameter section and the large diameter section, a positioning column is arranged on the second step surface, and a positioning hole is arranged on the sealing ring corresponding to the positioning column.

[0014] Furthermore, the first port and the third port are both connected with elbows, and the elbows are connected to the delivery pipeline.

[0015] Furthermore, the elbow is connected to the delivery pipeline via a flange.

[0016] Furthermore, the head end of the rotating mechanical arm for conveying fluid is connected to an external water supply pipeline, and the head end of the rotating mechanical arm for conveying fluid is fixed to an external base frame through a fixing frame.

[0017] Furthermore, the rotating bearing is a deep groove ball bearing.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] The rotary mechanical arm for conveying fluid provided by the utility model connects two conveying pipes connected to the rotary joint with the first port of the rotary conduit and the third port of the outer cylinder respectively. The rotary conduit of the rotary joint can rotate relative to the outer cylinder, and the cleaning mechanism is connected to the end of the rotary mechanical arm, so that the mechanical arm can complete the conveying of cleaning fluid to the cleaning mechanism through the rotation of each rotary joint when the cleaning mechanism is translated. At the same time, compared with the prior art of using a high-pressure hose to convey cleaning fluid to the cleaning mechanism, since the conveying pipe and the rotary joint used in the utility model are both rigid parts, the problems of jamming, wear and swinging are avoided, thereby improving the stability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a specific embodiment 1 of a rotary mechanical arm for conveying fluid in the utility model;

[0021] Figure 2 yes Figure 1 Schematic diagram of the structure of the rotating joint.

[0022] In the figure: 1. conveying pipeline; 2. rotating joint; 3. external water supply pipeline; 4. fixing frame; 5. rotating pipeline; 501. first port; 502. second port; 6. deep groove ball bearing; 7. outer cylinder; 701. third port; 702. small diameter section; 703. middle diameter section; 704. large diameter section; 705. first step surface; 706. second step surface; 8. sealing ring; 801. damping mechanism; 802. positioning column; 9. elbow. DETAILED DESCRIPTION

[0023] The technical solution of the utility model is further described in detail below through specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0024] Specific embodiment 1 of the rotary mechanical arm for conveying fluid provided by the utility model:

[0025] A rotating mechanical arm for conveying fluids, comprising at least two conveying pipes 1 and a plurality of rotating joints 2 connected at both ends of the conveying pipes, two adjacent conveying pipes 1 are connected via a rotating joint 2, and the axes of the two adjacent conveying pipes 1 are perpendicular to the rotating joint 2. In this embodiment, there are three conveying pipes 1 and three rotating joints 2, two of which are installed at the connection parts of the three conveying pipes 1, and another rotating joint 2 is installed at the end of the rotating mechanical arm for conveying fluids to connect a cleaning mechanism for cleaning a heat exchanger. At the same time, the conveying pipe 1 at the head end of the rotating mechanical arm for conveying fluids is connected to an external water supply pipe 3, and the conveying pipe 1 at the head end of the rotating mechanical arm for conveying fluids is fixed to an external base frame via a fixing frame 4.

[0026] The rotary joint 2 comprises a rotary conduit 5, two deep groove ball bearings 6 sleeved on the outer wall of the rotary conduit 5, and an outer cylinder 7 matched with the outer ring of the deep groove ball bearing 6, a bearing cap 8 for sealing the deep groove ball bearing 6 is arranged on one end face of the outer cylinder 7, and a sealing ring 9 is arranged between the rotary conduit 5 and the bearing cap 8 to improve the sealing performance of the rotary joint 2. The rotary conduit 5 has a first port 501 connected to the delivery pipeline 1 and a second port 502 located in the outer cylinder 7, the outer cylinder 7 has a third port 701 connected to the delivery pipeline 1, and a sealing structure for sealing the second port 502 with the inner wall of the outer cylinder 7 is arranged in the outer cylinder 7.

[0027] In order to facilitate the installation of the sealing structure, the inner wall of the outer cylinder 1 is set to a double-step columnar shape, so that the inner wall of the outer cylinder 7 has a small diameter section 702, a middle diameter section 703 for installing the sealing structure and a large diameter section 704 for installing the rotating bearing. The small diameter section 702 has a third port 701 connected to the conveying pipeline 1, and a first step surface 705 is formed between the small diameter section and the middle diameter section. A sealing structure is arranged between the first step surface 705 and the second port 502. In this embodiment, the sealing structure includes a sealing ring 8 and a damping mechanism 801 for squeezing the sealing ring. The damping mechanism 801 is installed on the first step surface 705. The two end faces of the sealing ring 8 are respectively in contact with the damping mechanism 801 at the second port 502. Under the squeezing action of the damping mechanism 801, the sealing performance between the rotating conduit 5 and the outer cylinder 7 is improved.

[0028] In order to increase the installation stability of the sealing mechanism, a damping column is provided on the first step surface 705 and an elastic member is sleeved on the damping column. Specifically, in this embodiment, the elastic member is not a spring. At the same time, a positioning column 802 is provided on the second step surface 706 formed between the middle diameter section and the large diameter section. Correspondingly, a positioning hole is provided on the sealing ring 8 corresponding to the positioning column.

[0029] In order to make the axes of two adjacent conveying pipelines 1 perpendicular to the rotating joint 2 , the first port 501 of the rotating conduit 5 and the third port 701 of the outer cylinder 7 are both connected with a 90-degree elbow 9 , and the elbow 9 is connected to the conveying pipeline 1 .

[0030] The working principle of the rotating mechanical arm for conveying fluid is as follows: the head end of the mechanical arm is fixed on the base frame through the fixing frame 4, the end of the mechanical arm is connected to the cleaning mechanism for cleaning the heat exchanger, and the two conveying pipes 1 connected to the rotating joint 2 are respectively connected to the rotating conduit 5 of the rotating joint 2 and the outer cylinder 7, and a sealing structure for sealing the rotating conduit 5 and the outer cylinder 7 is provided in the outer cylinder 7. Since the rotating conduit 5 can rotate relative to the outer cylinder 7, the mechanical arm can complete the conveying of the cleaning fluid of the cleaning mechanism through the rotation of each rotating joint 2 when the cleaning mechanism is translated, and then under the condition of good sealing performance of the rotating joint. At the same time, the conveying pipe 1 and the rotating joint 2 of the mechanical arm are rigid parts, which avoid the problems of jamming, wear and swinging, thereby improving the stability of the system.

[0031] Specific embodiment 2 of the rotating mechanical arm for conveying fluid provided by the utility model: the difference between this embodiment and embodiment 1 is that the type of the rotating bearing is different. Specifically, the rotating bearing is a tapered roller bearing or an angular contact ball bearing.

[0032] Specific embodiment 3 of the rotating mechanical arm for conveying fluid provided by the utility model: the difference between this embodiment and embodiment 1 is that the connection method between the elbow and the conveying pipeline is different. Specifically, the elbow and the conveying pipeline are connected by flange or threaded connection.

[0033] Specific embodiment 4 of the rotating mechanical arm for conveying fluid provided by the utility model: the difference between this embodiment and embodiment 1 is that the structure of the elastic member is different, specifically, the elastic member is an elastic rubber ring.

[0034] Specific embodiment 5 of the rotating mechanical arm for conveying fluid provided by the utility model: the difference between this embodiment and embodiment 1 is that the structure of the damping mechanism is different. Specifically, the damping mechanism only includes an elastic member arranged on the first step surface.

[0035] Specific embodiment 6 of the rotating mechanical arm for conveying fluid provided by the utility model: the difference between this embodiment and embodiment 1 is that the composition of the sealing structure is different. Specifically, the sealing structure only includes a sealing ring, and the sealing ring is arranged between the second port and the first step surface.

[0036] Specific embodiment 7 of the rotating mechanical arm for conveying fluid provided by the utility model: The difference between this embodiment and embodiment 1 is that the structure of the inner wall of the outer cylinder is different. Specifically, the inner wall of the outer cylinder is in a stepped columnar shape, so that the inner wall of the outer cylinder has a small diameter section and a large diameter section, and the small diameter section has a third port connected to the conveying pipeline, and the sealing structure and the deep groove ball bearing are both installed on the large diameter section.

[0037] Specific embodiment 8 of the rotating mechanical arm for conveying fluid provided by the utility model: the difference between this embodiment and embodiment 1 is that the positioning form of the sealing ring is different. Specifically, no positioning column is set on the second step surface, and correspondingly, no positioning hole is set on the sealing ring.

[0038] Specific embodiment 9 of the rotating mechanical arm for conveying fluid provided by the utility model: the difference between this embodiment and embodiment 1 is that the connection method between the first port and the third port and the conveying pipeline is different. Specifically, the first port and the third port are connected with a conical tube, and the conical tube and the conveying pipeline are connected by welding, threading or flange.

[0039] Specific embodiment 10 of the rotating mechanical arm for conveying fluid provided by the utility model: the difference between this embodiment and embodiment 1 is that the number of conveying pipes and rotating joints is different. Specifically, there are two conveying pipes and two rotating joints, one of which is installed at the connection part of the two conveying pipes, and the other rotating joint is installed at the end of the rotating mechanical arm for conveying fluid to connect a cleaning mechanism for cleaning the heat exchanger.

[0040] In other embodiments, there are four, five or more delivery pipes, and correspondingly, the number of rotary joints is equal to the number of delivery pipes. One of the rotary joints is installed at the end of a rotating mechanical arm for conveying fluid to connect a cleaning mechanism for cleaning the heat exchanger, and the remaining rotary joints are installed at the connection parts of the delivery pipes.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for protection of the utility model.

Claims

1. A rotary mechanical arm for conveying fluid, characterized in that: It comprises at least two conveying pipes and a plurality of rotating joints connected at both ends of the conveying pipes, two adjacent conveying pipes are connected via a rotating joint, the axes of the two adjacent conveying pipes are perpendicular to the rotating joint, the rotating joint comprises a rotating conduit, two rotating bearings sleeved on the outer wall of the rotating conduit, and an outer cylinder body matched with the outer ring of the rotating bearing, the rotating conduit has a first port connected to the conveying pipe and a second port located in the outer cylinder body, the outer cylinder body has a third port connected to the conveying pipe, and a sealing structure for sealing the second port with the inner wall of the outer cylinder body is arranged in the outer cylinder body.

2. The rotary mechanical arm for conveying fluid according to claim 1, characterized in that: The inner wall of the outer cylinder is in a double-step columnar shape, so that the inner wall of the outer cylinder has a small diameter section, a middle diameter section for installing a sealing structure, and a large diameter section for installing a rotating bearing. The small diameter section has a third port connected to the conveying pipeline, a first step surface is formed between the small diameter section and the middle diameter section, and the sealing structure is arranged between the first step surface and the second port.

3. The rotary mechanical arm for conveying fluid according to claim 2, characterized in that: The sealing structure comprises a sealing ring and a damping mechanism for squeezing the sealing ring. The damping mechanism is installed on the first step surface. The two end surfaces of the sealing ring are in contact with the damping mechanism through the second port respectively.

4. The rotary mechanical arm for conveying fluid according to claim 3, characterized in that: The damping mechanism comprises a damping column arranged on the first step surface and an elastic member sleeved on the damping column.

5. The rotary mechanical arm for conveying fluid according to claim 4, characterized in that: The elastic member is a spring.

6. The rotary mechanical arm for conveying fluid according to any one of claims 3 to 5, characterized in that: A second step surface is formed between the middle diameter section and the large diameter section, a positioning column is arranged on the second step surface, and a positioning hole is arranged on the sealing ring corresponding to the positioning column.

7. The rotary mechanical arm for conveying fluid according to any one of claims 1 to 5, characterized in that: The first port and the third port are both connected with elbows, and the elbows are connected to the delivery pipeline.

8. The rotary mechanical arm for conveying fluid according to claim 7, characterized in that: The elbow is connected to the delivery pipeline via a flange.

9. The rotary mechanical arm for conveying fluid according to any one of claims 1 to 5, characterized in that: The head end of the rotating mechanical arm for conveying fluid is connected to an external water supply pipeline, and the head end of the rotating mechanical arm for conveying fluid is fixed on an external base frame through a fixing frame.

10. The rotary mechanical arm for conveying fluid according to any one of claims 1 to 5, characterized in that: The rotary bearing is a deep groove ball bearing.

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