Electric barring gear for vertical high-temperature molten salt pump

Abstract

According to the electric barring gear for the vertical high-temperature molten salt pump, the pair of driving wheels meshed with each other and the driven wheel fixedly connected with the pump shaft of the molten salt pump are adopted, the driving wheels can move up and down, and the main shaft of the electromagnetic switch is vertically arranged and can move up and down, so that the electric barring gear can be driven by the electromagnetic switch; the main shaft is reset to the second position from the first position through the electromagnetic switch for driving the shifting fork assembly to move up and down and the reset spring, so that the shifting fork assembly and the reset spring of the automatic separation mechanism are matched to act, and the driving wheel can be switched between the first position and the second position; therefore, the electric turning of the molten salt pump can be conveniently realized. Especially, after the driving wheel and the driven wheel are meshed through attraction of the electromagnetic switch, the driving motor can be powered on to rotate, and the safety of the equipment is ensured.

Description

Technical Field

[0001] The present invention relates to an electric barring device for a vertical high-temperature molten salt pump, and particularly to a device that addresses the need for remote automatic barring inspection during the operation of a vertical high-temperature molten salt pump, enables remote self-inspection during equipment startup, and reduces the daily maintenance workload of operators. Background Art

[0002] A molten salt pump is a pump specifically designed to transport high-temperature binary or ternary molten salts. It is used for the transportation of high-temperature nitrates and nitrites, and is also widely used in chemical processes such as melamine, salt production, soda ash production, and urea. The temperature of the transported medium is usually between 300°C and 600°C. This device is an important equipment in solar thermal power generation, molten salt energy storage, and molten salt reactors. Molten salt pumps are usually arranged in parallel in multiple units, and usually one or more units operate simultaneously according to the power generation amount. Since solar thermal power generation is affected by many factors such as light intensity, radiation intensity, sunshine duration, and cloud cover, its power generation amount is constantly changing. As the main equipment for transporting heat storage and transfer media in a solar power generation system, the molten salt pump needs to be frequently started and stopped according to system requirements. However, before each pump start, barring inspection is required to ensure the safety of the equipment. Currently, on-site manual barring is mostly used, but due to the relatively high operating position of the on-site equipment from the ground, multiple people are required to cooperate for equipment barring, which has problems such as long inspection time, difficult operation, and easy occurrence of danger. Summary of the Invention

[0003] Aiming at the above technical problems, the main purpose of the present invention is to provide an electric barring device for a vertical high-temperature molten salt pump to meet the requirement of remote automatic barring of the vertical high-temperature molten salt pump.

[0004] To solve the above technical problems, an electric barring device for a vertical high-temperature molten salt pump provided by the present invention includes: A pair of meshing transmission mechanisms, which include a movable upper and lower driving wheel and a driven wheel. The driving wheel has an upper surface and a lower surface. Among them, the driven wheel is coaxially and fixedly connected to the vertically arranged pump shaft of the vertical high-temperature molten salt pump so as to drive the pump shaft to rotate. The driving wheel drives the driven wheel to rotate, thereby driving the pump shaft to rotate to achieve barring; A first driving mechanism for driving the driving wheel to rotate; and an automatic separation mechanism for controlling the vertical movement of the driving wheel to engage and disengage with the driven wheel. The automatic separation mechanism includes a fork assembly linked to the driving wheel and an electromagnetic switch for driving the vertical movement of the fork assembly. The electromagnetic switch is provided with a return spring and a magnetic attraction mechanism. The main shaft of the electromagnetic switch is vertically arranged and can move up and down. The fork assembly is fixedly connected to the main shaft. The return spring is used to reset the main shaft from the first position to the second position. Among them, the fork assembly includes: A chuck that clamps the upper and lower surfaces of the driving wheel. The chuck has a laterally arranged upper arm and a lower arm, and the upper arm and the lower arm form a U-shaped cavity. A part of the upper and lower surfaces of the driving wheel is received in the cavity so that the driving wheel is clamped by the chuck, enabling the driving wheel to move synchronously with the chuck vertically. Wherein: When the electromagnetic switch is energized and working, at this time, the main shaft is driven to the first position by the magnetic attraction mechanism. At this time, the main shaft drives the fork assembly to drive the engagement of the driving wheel and the driven wheel; When the electromagnetic switch is de-energized and not working, at this time, the main shaft is driven by the return spring to reset to the second position. At this time, the fork assembly separates the driving wheel and the driven wheel.

[0005] Furthermore, the magnetic attraction mechanism includes a magnet and an adsorption block.

[0006] Still further, the magnet is an electromagnet.

[0007] Furthermore, the driving wheel and the driven wheel adopt a gear transmission mechanism.

[0008] Furthermore, the driving wheel and the driven wheel adopt a pulley transmission mechanism.

[0009] Furthermore, the first driving mechanism adopts an electric motor.

[0010] Still further, the first driving mechanism further includes a speed reducer.

[0011] Furthermore, the driven wheel is connected to the driving shaft of the first driving mechanism (8) through a vertically arranged guide pin so that the driving wheel can move up and down along the guide pin.

[0012] Furthermore, the diameter of the driving wheel is smaller than the diameter of the driven wheel so that the rotational speed of the driven wheel is relatively reduced.

[0013] Furthermore, upper and lower contact heads that contact the upper and lower surfaces of the driving wheel are respectively provided at the end portions of the upper arm and the lower arm of the chuck to reduce the frictional resistance of the driving wheel.

[0014] Furthermore, a linkage is further included. The linkage is connected to the first driving mechanism and the electromagnetic switch so that after the electromagnetic switch works, the first driving mechanism can be energized and work, ensuring the safety of the equipment.

[0015] An electric barring device for a vertical high-temperature molten salt pump provided by the present invention. Since a pair of driving wheel and driven wheel fixedly connected to the pump shaft of the molten salt pump are meshed with each other, wherein the driving wheel can move up and down, and the main shaft of the electromagnetic switch is vertically arranged and can move up and down. In this way, through the electromagnetic switch and the return spring that drive the fork assembly to move up and down, the main shaft is reset from the first position to the second position. Therefore, the fork assembly of the automatic separation mechanism and the return spring cooperate with each other to enable the driving wheel to be converted between the first position and the second position, and the electric barring of the molten salt pump can be conveniently realized. In particular, when the electromagnetic switch is attracted to make the driving wheel and the driven wheel meshed, the driving motor can be powered on and rotated, ensuring the safety of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. is a schematic diagram of the overall structure of an electric barring device for a vertical high-temperature molten salt pump provided by the present invention.

[0017] Figure 2 In the present invention Figure 1 FIG. is a partially enlarged schematic view of part A in FIG.

[0018] Figure 3 FIG. is a schematic diagram of the structure of an embodiment of the electromagnetic switch of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following is a detailed description of the technical solution of the present invention with reference to the preferred embodiments shown in the drawings.

[0020] Referring to Figure 1 and Figure 2 , an electric barring device for a vertical high-temperature molten salt pump provided by the present invention includes a transmission mechanism composed of a driving wheel 5 and a driven wheel 4 that are meshed with each other, a first driving mechanism 8, and an automatic separation mechanism 700. In this embodiment, the driving wheel 5 can move up and down. It has an upper surface 51 and a lower surface 52. Among them, the driven wheel 4 is coaxially and fixedly connected to the vertically arranged pump shaft of the vertical high-temperature molten salt pump to drive the pump shaft to rotate. The driving wheel 5 drives the driven wheel 4 to rotate, thereby driving the pump shaft to rotate to realize barring. Referring to Figure 1, in this embodiment, the driving wheel 5 and the driven wheel 4 adopt a gear transmission mechanism. The driven wheel 4. The pump shaft consists of an upper shaft 1 and a lower shaft 14 at both ends. The driven wheel 4 is arranged between the upper shaft 1 and the lower shaft 14 and is fixed by a coupling 2 through a connecting screw 3. In this way, when the driven wheel 4 rotates, the pump shaft also rotates accordingly. In addition, in this embodiment, the diameter of the driving wheel 5 is smaller than that of the driven wheel 4 so that the rotational speed of the driven wheel 4 is relatively reduced, making it easier to control the barring of the machine. The first driving mechanism 8 adopts a motor 12 and a speed reducer 80. In this way, the rotational speed of the driving wheel 5 will be lower, and the rotational speed of the driving wheel 5 is very low, thus making it more convenient to bar the machine.

[0021] Refer to again Figure 2 , the driving wheel 5 is connected to the driving shaft 81 of the first driving mechanism 8 through a vertically arranged guide pin 82 so that the driving wheel 5 can move up and down along the guide pin 82.

[0022] The automatic separation mechanism 700 controls the up and down movement of the driving wheel 5 to engage and disengage with the driven wheel 4. The automatic separation mechanism 700 includes a fork assembly 7 linked to the driving wheel, and an electromagnetic switch 9 that drives the fork assembly to move up and down. The electromagnetic switch 9 is provided with a return spring 10 and a magnetic attraction mechanism. The main shaft 91 of the electromagnetic switch 9 is vertically arranged and can move up and down. The fork assembly 7 is fixedly connected to the main shaft 91. The return spring 10 is used to reset the main shaft 91 from the first position to the second position.

[0023] The fork assembly 7 includes a chuck 71 that clamps the upper surface 51 and the lower surface 52 of the driving wheel 5. The chuck 71 has an upper arm 711 and a lower arm 712 arranged horizontally. The upper arm 711 and the lower arm 712 form a U-shaped cavity 70. A part of the upper surface 51 and the lower surface 52 of the driving wheel 5 is accommodated in the cavity 70 so that the driving wheel 5 is clamped by the chuck 71 and the driving wheel 5 moves synchronously (up and down) with the chuck 71. The end parts of the upper arm 711 and the lower arm 712 of the chuck 71 are respectively provided with an upper contact 713 and a lower contact 714 that contact the upper surface 51 and the lower surface 52 of the driving wheel 5 to reduce the frictional resistance of the driving wheel 5.

[0024] Refer to Figure 3, in this embodiment, the magnetic attraction mechanism includes a magnet 92 and an adsorption block 93. Among them, the magnet 92 is an electromagnet, which is arranged on the housing 95 of the electromagnetic switch 9, and the adsorption block 93 is fixed on the main shaft 91. The guide sleeve 94 is used to guide the up and down movement of the main shaft 91, making the movement smoother. In this way, when the switch 99 is turned on, the magnet 92 overcomes the elastic force of the return spring 10 and attracts the adsorption block 93 to move upward, so that the main shaft 91 reaches the first position, that is, the position where the driving wheel 5 meshes with the driven wheel 4.

[0025] When the switch 99 is turned off, the magnet 92 has no magnetic force. Then, the return spring 10 adsorbs the block 93 including the main shaft 91 to reset to the second position, that is, the position where the driving wheel 5 is separated from the driven wheel 4.

[0026] See Figure 1 、 Figure 2 and Figure 3 , when the electromagnetic switch 9 is not powered on and working, the driving wheel 5 and the driven wheel 4 are separated in position (i.e., the second position). When the electromagnetic switch 9 is powered on and working, at this time, the main shaft 91 overcomes the elastic force of the return spring 10 and drives the fork assembly 7 to move upward, thereby driving the driving wheel 5 to move upward and mesh with the driven wheel 4 (in the first position). At this time, the power supply of the motor 12 is turned on, and the motor 12 works to drive the reducer 80 to rotate. Then, the driving wheel 5 rotates, driving the pump shaft to rotate, and the barring gear is completed. When the electromagnetic switch 9 is powered off and not working, at this time, the main shaft 91 is driven by the return spring 10 to reset. At this time, the main shaft 91 drives the fork assembly 7 to move downward, thereby driving the driving wheel 5 to move downward to the second position. At this time, the driving wheel 5 is separated from the driven wheel 4, and the barring gear cannot be performed.

[0027] In addition, an electric barring gear device for a vertical high-temperature molten salt pump provided by the present invention further includes a coupling. The coupling is connected to the first driving mechanism 8 and the electromagnetic switch 9. The switches for respectively controlling the work of the first driving mechanism 8 and the electromagnetic switch 9 are set to be linked. In this way, after the electromagnetic switch 9 is powered on and working, the first driving mechanism 8 can be powered on and working, thereby ensuring the safety and reliability of the equipment work. In addition, the system can also judge whether the main equipment meets the starting requirements by setting a monitor for monitoring the magnitude of the running current of the driving motor, realizing remote automatic control.

[0028] See again Figure 1 , the first driving mechanism 8 and the electromagnetic switch 9 are integrally fixed on the equipment bracket 6 through the bracket 11 and the fixing screws 13. The installation and removal of the entire device can be realized only by installing and removing the fixing screws 13, and the installation and removal are convenient.

[0029] For those skilled in the art, the use of a pulley drive mechanism for the driving wheel 5 and the driven wheel 4 and the use of only the electric motor 12 for the first driving mechanism 8 can also achieve the object of the present invention.

[0030] From the above description, it can be found that for an electric barring device for a vertical high-temperature molten salt pump provided by the present invention, since a pair of the driving wheel 5 and the driven wheel 4 fixedly connected to the pump shaft of the molten salt pump are engaged with each other, wherein the driving wheel 5 can move up and down, and the main shaft 91 of the electromagnetic switch 9 is vertically arranged and can move up and down. Thus, through the electromagnetic switch 9 and the return spring 10 that drive the fork assembly to move up and down, the main shaft 91 is reset from the first position to the second position. Therefore, the fork assembly 7 of the automatic separation mechanism 700 and the return spring 10 cooperate with each other to enable the driving wheel 5 to be converted between the first position and the second position, and the electric barring of the molten salt pump can be conveniently realized. In particular, after the electromagnetic switch 9 is attracted to engage the driving wheel 5 and the driven wheel 4, the driving motor can be powered on and rotated, ensuring the safety of the equipment.

[0031] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the description in the specification are only used to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. An electric barring gear for a vertical high-temperature molten salt pump, characterized in that, The device includes: A pair of meshing transmission mechanisms, which include a driving wheel (5) that can move up and down and a driven wheel (4). The driving wheel (5) has an upper surface (51) and a lower surface (52). Among them, the driven wheel (4) is coaxially and fixedly connected to the vertically arranged pump shaft of the vertical high-temperature molten salt pump so as to drive the pump shaft to rotate. The driving wheel (5) drives the driven wheel (4) to rotate, thereby driving the pump shaft to rotate to realize barring; and A first driving mechanism (8) for driving the driving wheel (5) to rotate; An automatic separation mechanism (700) for controlling the up and down movement of the driving wheel (5) to engage and disengage with the driven wheel (4). The automatic separation mechanism (700) includes a fork assembly (7) linked to the driving wheel, and an electromagnetic switch (9) for driving the fork assembly (7) to move up and down. The electromagnetic switch (9) is provided with a return spring (10) and a magnetic attraction mechanism. The main shaft (91) of the electromagnetic switch (9) is vertically arranged and can move up and down. The fork assembly (7) is fixedly connected to the main shaft (91). The return spring (10) is used to reset the main shaft (91) from the first position to the second position. Among them, the fork assembly (7) includes: A chuck (71) for clamping the upper surface (51) and the lower surface (52) of the driving wheel (5). The chuck (71) has a laterally arranged upper arm (711) and a lower arm (712). The upper arm (711) and the lower arm (712) form a U-shaped cavity (70). A part of the upper surface (51) and the lower surface (52) of the driving wheel (5) are accommodated in the cavity (70) so that the driving wheel (5) is clamped by the chuck (71) and the driving wheel (5) moves up and down synchronously with the chuck (71). Among them: When the electromagnetic switch (9) is powered on and working, at this time, the main shaft (91) is driven to the first position by the magnetic attraction mechanism. At this time, the main shaft (91) drives the fork assembly (7), thereby driving the driving wheel (5) to engage with the driven wheel (4); When the electromagnetic switch (9) is powered off and not working, at this time, the main shaft (91) is driven by the return spring (10) to reset to the second position. At this time, the fork assembly (7) separates the driving wheel (5) from the driven wheel (4).

2. The electric barring gear for a vertical high-temperature molten salt pump according to claim 1, characterized in that, The magnetic attraction mechanism includes a magnet (92) and an adsorption block (93).

3. The electric barring device for a vertical high-temperature molten salt pump according to claim 2, characterized in that, The magnet (92) is an electromagnet.

4. An electric barring device for a vertical high-temperature molten salt pump according to claim 1, characterized in that, The driving wheel (5) and the driven wheel (4) adopt a gear transmission mechanism.

5. The electric barring gear for a vertical high-temperature molten salt pump according to claim 1, wherein, The driving wheel (5) and the driven wheel (4) adopt a pulley transmission mechanism.

6. The electric barring device for a vertical high-temperature molten salt pump according to claim 1, characterized in that, The first driving mechanism (8) adopts an electric motor.

7. The electric barring gear for a vertical high-temperature molten salt pump according to claim 6, characterized in that, The first driving mechanism (8) further includes a speed reducer (80).

8. The electric barring gear for a vertical high-temperature molten salt pump according to claim 1, characterized in that, The driven wheel (4) is connected to the driving shaft (81) of the first driving mechanism (8) through a vertically arranged guide pin (82) so that the driving wheel (5) can move up and down along the guide pin (82).

9. The electric barring gear for a vertical high-temperature molten salt pump according to claim 1, wherein The diameter of the driving wheel (5) is smaller than the diameter of the driven wheel (4) so that the rotation speed of the driven wheel (4) is relatively reduced.

10. An electric barring device for a vertical high-temperature molten salt pump according to claim 1, characterized in that, The end portions of the upper arm (711) and the lower arm (712) of the chuck (71) are respectively provided with an upper contact head (713) and a lower contact head (714) that are in contact with the upper surface (51) and the lower surface (52) of the driving wheel (5), so as to reduce the frictional resistance of the driving wheel (5).

11. An electric barring gear for a vertical high-temperature molten salt pump according to claim 1, characterized in that, It further includes a linkage, and the linkage is connected to the first driving mechanism (8) and the electromagnetic switch (9) such that after the electromagnetic switch (9) operates, the first driving mechanism (8) can be powered on to operate.

Images