Junction box for sweeping spray pump

Abstract

The invention discloses a junction box for a sweeping spray pump, and relates to the field of pump body equipment, and the junction box comprises a junction box body fixedly arranged on the surface of the sweeping spray pump; the wiring box body is used for protecting the joint of a sweeping spray pump wiring harness and an external power supply wiring harness; an insulating seat for insulation and a plurality of connecting buses which are fixedly arranged on the surface of the insulating seat and are used for connecting and conducting a sweeping spray pump wiring harness and an external power supply wiring harness are fixedly arranged in the wiring box body, and a connecting plate for the sweeping spray pump wiring harness to pass through is embedded and sealed at the joint of the wiring box body and the sweeping spray pump. According to the device, the sweeping spray pump can be conveniently and quickly mounted at the bottom of a cabin, the operation is simpler, and meanwhile, the connection strength between the cable and the sweeping spray pump is also improved.

Description

Technical Field

[0001] The present application relates to the field of pump equipment, and in particular to a junction box for a tank stripping spray pump. Background Art

[0002] The stripping / spraying pump is a vertical multi-stage submersible pump, which is mainly used when the main liquid cargo pump is unable to discharge LNG cargo at a lower liquid level. In addition, during loading or navigation, it is also used to supply liquid natural gas to the spray tower for cooling the liquid cargo tank space.

[0003] When discharging the cryogenic liquid in the tank, it is necessary to first use the main liquid cargo pump to extract it. The main liquid cargo pump is large in size and has a fast extraction speed. However, for a small amount of cryogenic liquid at the bottom of the tank, the main liquid cargo pump is difficult to extract and a smaller tank stripping pump is needed to extract it. The tank stripping pump is also called a tank stripping spray pump. Support bases are set on both sides of the pump group. The support bases are fixed on the base to extract the cryogenic liquid.

[0004] When the current tank stripping spray pump is installed inside the cabin, its power supply cable is always connected to the terminal of the tank stripping spray pump. Due to the large space inside the cabin, at least 30 meters of cable is suspended inside the cabin, which will cause a large pulling force on the tank stripping spray pump, making the tank stripping spray pump very difficult to install. Summary of the Invention

[0005] In order to improve the problem of difficult installation of a tank stripping spray pump, the present application provides a junction box for a tank stripping spray pump.

[0006] The present application provides a junction box for a stripping spray pump that adopts the following technical solution: A junction box for a tank stripping spray pump comprises a junction box body fixedly mounted on the surface of the tank stripping spray pump; The junction box is used to protect the connection between the stripping spray pump wiring harness and the external power supply wiring harness; The junction box is internally provided with an insulating seat for insulation and a plurality of conductive connecting busbars fixed on the surface of the insulating seat for connecting the wiring harness of the tank stripping spray pump and the external power supply wiring harness. The connection between the junction box and the tank stripping spray pump is embedded and sealed with a connecting plate for the wiring harness of the tank stripping spray pump to pass through. A junction box cover is fixedly provided at the opening of the junction box body.

[0007] By adopting the above technical solution, the junction box is pre-installed on the tank stripping spray pump, so that the device can quickly and easily install the tank stripping spray pump on the bottom of the cabin, making the operation simpler and also increasing the connection strength between the cable and the tank stripping spray pump.

[0008] Preferably, there are at least three connecting busbars, which are respectively arranged as "U", "V" and "W". The surface of each connecting busbar is fixed with a cable that can move through the side wall of the junction box, and the surface of each connecting busbar is fixed with a wiring harness connected to the internal motor of the tank cleaning spray pump.

[0009] By adopting the above technical solution, the connecting busbar plays the role of a transfer line, thereby realizing the transmission of power and facilitating the connection of the cable and the motor harness.

[0010] Preferably, a cable seat is fixedly provided on the surface of the junction box on one side of the cable, and a cable clamp adapted to the cable seat is fixedly provided on the surface of the junction box on the other side of the cable. The cable seat and the cable clamp can clamp, fix and seal the cable.

[0011] By adopting the above technical solution, arc-shaped grooves are opened on the opposite sides of the cable seat and the cable clamp. The radius of the two arc-shaped grooves is the same as the radius of the cable and forms a threading hole. The cable is located in the threading hole, thereby making the fixation more secure. The surface of the arc-shaped groove can also be provided with a corrosion-resistant and low-temperature sealing ring to prevent liquid from leaking into the interior of the junction box.

[0012] Preferably, the connecting plate is configured to be in a "mountain" shape, and each protrusion of the connecting plate is configured to be a hollow cylinder.

[0013] By adopting the above technical solution, the setting of the connecting plate can seal three wiring harnesses at one time, which is convenient for installation. At the same time, the circular holes on the outer periphery of the connecting plate are designed to be lightweight.

[0014] Preferably, an annular groove corresponding to the raised portion of the connecting plate is provided on the surface of the tank stripping spray pump, and the raised portion of the connecting plate is inserted into the inner portion of the annular groove.

[0015] By adopting the above technical solution, the annular groove has a limiting and guiding effect on the raised portion, and the raised portion can squeeze the V-shaped sealing ring or O-shaped sealing ring of the sealing assembly to achieve a sealing effect.

[0016] Preferably, a sealing component is filled between the protrusion of the connecting plate and the bottom of the annular groove for sealing.

[0017] By adopting the above technical solution, the extrusion of the protrusion and the limitation of the annular groove can cause the sealing component to deform and achieve sealing.

[0018] Preferably, the sealing assembly is used to fill the gap between the tank stripping spray pump wiring harness and the tank stripping spray pump.

[0019] By adopting the above technical solution, the design of the sealing component is used to increase the anti-leakage ability of the assembly gap of each structure.

[0020] Preferably, each protrusion of the connecting plate corresponds to a connecting busbar.

[0021] By adopting the above technical solution, the protrusion of the connecting plate corresponds to the connecting busbar and is easy to be inserted into the annular groove.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. Fix the junction box on the tank stripping spray pump in advance without installing the cable. When the tank stripping spray pump is installed on the bottom of the cabin, there is no restriction of the cable, which makes the installation of the tank stripping spray pump more convenient and quick. After the installation is completed, install the cable in the junction box to fix the cable and increase the tensile strength of the cable and the terminal of the tank stripping spray pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the connection between the stripping spray pump and the wiring box of this application; Figure 2 This is a schematic cross-sectional view of the interior of the junction box of the present application; Figure 3 This is a side cross-sectional schematic diagram of the stripping spray pump and the junction box of the present application; Figure 4 A schematic top view of the present application; Figure 5 This is a schematic diagram of the installation of the junction box and connection plate of this application; Figure 6 This is a schematic diagram of the installation of the O-ring and the ring groove for this application; Figure 7 This is a schematic diagram of the installation of the V-shaped sealing ring and the ring groove for this application; Figure 8 This is a schematic diagram of the separation of the connection plate and the junction box in Example 1 of the present application; Figure 9 This is a schematic diagram of the connection plate of Example 2 of the present application.

[0024] Reference numerals: 1, stripping spray pump; 2, junction box; 3, cable clamp; 4, insulation seat; 5, connecting busbar; 6, first bolt; 7, second bolt; 8. Third bolt; 9. Cable; 10. Cable holder; 11. Fourth bolt; 12. Fifth bolt; 13. Sixth bolt; 14. Junction box cover; 15. Seventh bolt; 16. Connecting plate; 17. V-shaped sealing ring; 18. Eighth bolt; 19. Threading hole; 20. Ninth bolt; 21. O-shaped sealing ring; 22. Ring groove. DETAILED DESCRIPTION

[0025] The following is combined with Figures 1-9 This application is described in further detail.

[0026] An embodiment of the present application discloses a junction box for a tank stripping spray pump.

[0027] Example 1 Reference Figure 1 A junction box for a tank stripping spray pump includes a junction box body 2 fixedly mounted on the surface of the tank stripping spray pump 1, and seventh bolts 15 are installed on both sides of the interior of the junction box body 2. The rod of the seventh bolt 15 is threadedly fixed to the tank stripping spray pump 1, and the junction box body 2 is set to stainless steel.

[0028] The junction box 2 is used to protect the connection of the wiring harness of the stripping spray pump 1 and the external power supply wiring harness.

[0029] Reference Figure 2 、 Figure 3 The bottom wall of the junction box 2 and the two ends of the insulating seat 4 are fixed by an eighth bolt 18, and the head fixed by the eighth bolt 18 is arranged on the outside of the junction box 2. The insulating seat 4 is used for electrical insulation, and a number of conductive connecting busbars 5 are fixed on the surface of the insulating seat 4 by the first bolt 6. The connecting busbar 5 is used to connect the wiring harness of the tank cleaning spray pump 1 and the external power supply wiring harness. The connecting busbar 5 is made of copper and is set to be "L" shaped. There are at least three connecting busbars 5, and the three connecting busbars 5 correspond to the "U", "V" and "W" items respectively. The surface of each connecting busbar 5 is fixed with a cable 9 by a third bolt 8. One end of the three cables 9 are all movable through the side wall of the junction box 2, and the cable 9 and the side wall of the junction box 2 are sealed by a sealing ring. The interior of the tank cleaning spray pump 1 includes structures such as a motor. The surface of each connecting busbar 5 is fixed with a wiring harness connected to the internal motor of the tank cleaning spray pump 1 by a second bolt 7.

[0030] During equipment manufacturing, the junction box 2 is first fixed to the tank stripping spray pump 1 by the seventh bolt 15, and then the wiring harness connecting the motor is fixed to the middle of the connecting bus 5 by the second bolt 7. It should be noted that it is not necessary to connect and fix the cable 9 to the connecting bus 5 before the tank stripping spray pump 1 is installed inside the cabin, thereby achieving the effect of separate assembly of the cable 9 and the junction box 2. The motor is set to a three-phase motor, and the wiring harnesses all pass through the housing of the tank stripping spray pump 1 and the junction box 2 and are fixed to their respective corresponding connecting busbars 5.

[0031] The insulating seat 4 is preferably made of epoxy resin.

[0032] Reference Figure 3 The gap between the raised portion of the connecting plate 16 and the bottom of the annular groove 22 is filled with a sealing component for sealing. The sealing component is used to fill the gap between the wiring harness of the tank stripping spray pump 1 and the tank stripping spray pump 1. The sealing component is provided as a V-shaped sealing ring 17 and an O-shaped sealing ring 21 (such as Figure 6As shown), it is preferably a V-shaped sealing ring 17, and multiple V-shaped sealing rings 17 are stacked and deformed relative to each other to achieve a sealing effect.

[0033] Reference Figure 2-Figure 4 、 Figure 7 、 Figure 8 The connection between the junction box 2 and the stripping spray pump 1 is embedded with a sealing connection plate 16, and both ends of the connection plate 16 are fixed to the junction box 2 by ninth bolts 20. Specifically, the rod of the ninth bolt 20 is movable through the junction box 2 and is threadedly fixed to the stripping spray pump 1. The connection plate 16 is for the three wiring harnesses of the stripping spray pump 1 to pass through side by side. The connection plate 16 is arranged in a "mountain" shape, and each protrusion of the connection plate 16 is arranged in parallel. Each protrusion is arranged in a hollow cylinder. Three parallel annular grooves 22 are opened on the surface of the stripping spray pump 1. The three annular grooves 22 correspond to the protrusions of the connection plate 16 one by one. The protrusions of the connection plate 16 are all inserted into the inner third of the annular groove 22, and the surface of the protrusion abuts the inner wall of the annular groove 22. Each protrusion of the connection plate 16 corresponds to the connecting busbar 5. A sealing gasket is provided between the connection plate 16 and the junction box 2.

[0034] The user fixes the junction box 2 on the tank cleaning spray pump 1, and then, multiple V-shaped sealing rings 17 are stacked relatively and installed inside the annular groove 22, and then the raised portion of the connecting plate 16 is inserted into the annular groove 22 and abutted against the V-shaped sealing ring 17, and then the connecting plate 16 is fixed to the tank cleaning spray pump 1 by the ninth bolt 20. As the connecting plate 16 moves toward the tank cleaning spray pump 1, the raised portion of the connecting plate 16 squeezes the multiple V-shaped sealing rings 17, causing the multiple V-shaped sealing rings 17 to deform, filling the gap between the wiring harness and the shell of the tank cleaning spray pump 1, thereby achieving a sealing and waterproof effect.

[0035] Reference Figure 3 The two sides of the opening of the junction box 2 are fixed to the junction box cover 14 by sixth bolts 13, and a sealing gasket is provided at the abutment between the junction box 2 and the junction box cover 14 to achieve a waterproof effect.

[0036] Reference Figure 2-Figure 5The surface of the junction box 2 is located on one side of the cable 9 and is fixed with a cable seat 10 by a fourth bolt 11. The fourth bolt 11 is set to at least two, and the rod of the fourth bolt 11 movably penetrates the cable seat 10 and the side wall of the junction box 2, and a nut threadedly connected to the rod of the fourth bolt 11 is provided inside the junction box 2, so that the nut abuts against the surface of the junction box 2 to achieve a fixing effect. A cable clamp 3 is fixed on the other side of the surface of the junction box 2 located on the cable 9. The cable clamp 3 is adapted to the cable seat 10, and the cable seat 10 and the cable clamp 3 can clamp and seal the cable 9. Specifically, fifth bolts 12 are horizontally penetrated on both sides of the cable clamp 3, and the position of the fifth bolts 12 avoids the position of the cable 9, so that the rod of the fifth bolt 12 is threadedly fixed to the cable seat 10, and at least three threading holes 19 are formed between the cable seat 10 and the cable clamp 3.

[0037] It should be noted that all gaps created by the splicing of this device are provided with corrosion-resistant and low-temperature-resistant sealing rings for sealing and waterproofing, and this is a well-known technology and will not be described one by one.

[0038] The implementation principle of the junction box for a tank stripping spray pump in an embodiment of the present application is: when the tank stripping spray pump 1 is manufactured, the junction box body 2 is installed on the tank stripping spray pump 1, and the wire harness of the tank stripping spray pump 1 is passed through the annular groove 22, the V-shaped sealing ring 17 and the raised part of the connecting plate 16, and then fixed to the connecting busbar 5 by the second bolt 7.

[0039] After the tank cleaning spray pump 1 is installed at the bottom of the cabin, the installer then passes the external power supply cable 9 through the junction box 2 and fixes it to the connecting busbar 5 through the third bolt 8. Subsequently, the cable clamp 3 is connected and fixed to the cable seat 10 through the fifth bolt 12, and the cable 9 is clamped and fixed to increase the tensile strength of the cable 9.

[0040] Afterwards, the installer installs and fixes the junction box cover 14 on the junction box body 2 using the sixth bolt 13 .

[0041] Therefore, the device can conveniently and quickly install the tank stripping spray pump 1 on the bottom of the cabin, making the operation simpler, and also increasing the connection strength between the cable 9 and the tank stripping spray pump 1.

[0042] Example 2 Please refer to Figure 9 , which is different from the embodiment in that: the structure of the connecting plate 16 can also be set as three "T"-shaped column sleeves corresponding to the three phases respectively, and at least four ninth bolts 20 are arranged around and penetrate each raised portion of the connecting plate 16, and the rods of the plurality of ninth bolts 20 are all threadedly fixed to the tank stripping spray pump 1. The setting of the ninth bolt 20 further increases the sealing and connection strength between the connecting plate 16 and the tank stripping spray pump 1, and the installation of the ninth bolt 20 also requires the use of an elastic gasket.

[0043] The protrusions of each connecting plate 16 pass through the holes in the side wall of the junction box 2. Then, the rod of the ninth bolt 20 is inserted into the mounting hole around each connecting plate 16 and the rod of the ninth bolt 20 is threadedly fixed to the tank cleaning spray pump.

[0044] The above are merely optional embodiments of the present disclosure and are not intended to limit the present disclosure. Those skilled in the art will readily appreciate that the present disclosure may be modified and varied in various ways. Any modifications, equivalent substitutions, improvements, and the like made within the spirit and principles of the present disclosure shall be included within the scope of protection of the present disclosure.

Claims

1. A junction box for a stripping spray pump, characterized by: It includes a wiring box (2) fixedly mounted on the surface of the stripping spray pump (1); The junction box (2) is used to protect the connection between the stripping spray pump wiring harness and the external power supply wiring harness; An insulating seat (4) for insulation is fixedly provided inside the junction box (2) and a plurality of conductive connecting busbars (5) for connecting the wiring harness of the tank sweeping spray pump and the external power supply wiring harness are fixedly provided on the surface of the insulating seat (4). A connecting plate (16) for the wiring harness of the tank sweeping spray pump to pass through is embedded and sealed at the connection between the junction box (2) and the tank sweeping spray pump (1); A junction box cover (14) is fixedly provided at the opening of the junction box body (2).

2. A junction box for a stripping spray pump according to claim 1, characterized in that: At least three connecting busbars (5) are provided, and are respectively arranged as "U", "V", and "W". A cable (9) that movably penetrates the side wall of the junction box (2) is fixed on the surface of each connecting busbar (5). A wiring harness connected to the internal motor of the tank cleaning spray pump is fixed on the surface of each connecting busbar (5).

3. A junction box for a stripping spray pump according to claim 1, characterized in that: A cable seat (10) is fixedly provided on the surface of the junction box (2) on one side of the cable (9), and a cable clamp (3) adapted to the cable seat (10) is fixedly provided on the surface of the junction box (2) on the other side of the cable (9). The cable seat (10) and the cable clamp (3) can clamp, fix and seal the cable (9).

4. A junction box for a stripping spray pump according to claim 1, characterized in that: The connecting plate (16) is configured in a "mountain" shape, and each protrusion of the connecting plate (16) is configured as a hollow cylinder.

5. A junction box for a stripping spray pump according to claim 4, characterized in that: The surface of the tank stripping spray pump (1) is provided with an annular groove (22) corresponding to the raised portion of the connecting plate (16), and the raised portion of the connecting plate (16) is inserted into the inside of the annular groove (22).

6. A junction box for a stripping spray pump according to claim 5, characterized in that: A sealing component for sealing is filled between the raised portion of the connecting plate (16) and the bottom of the annular groove (22).

7. A junction box for a stripping spray pump according to claim 6, characterized in that: The sealing assembly is used to fill the gap between the tank stripping spray pump wiring harness and the tank stripping spray pump (1).

8. The junction box for a stripping spray pump according to claim 7, characterized in that: Each protrusion of the connecting plate (16) corresponds to a connecting busbar (5).

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