Sealing structure of liquid level control submersible pump

Abstract

The utility model provides a sealing structure of a liquid level control submersible pump, belongs to the field of submersible pumps, and solves the problem that a floating ball switch of the submersible pump swings along with water flow, so that the sealing of the floating ball switch and a cable is damaged. The pump comprises a machine barrel, a pump body and a motor, a bearing end cover is installed above the machine barrel, a delivery chamber is arranged on the bearing end cover, a sealing sleeve is installed in the bearing end cover, a cable is installed in the sealing sleeve, a floating ball switch is connected to the cable in series, a sheath pressing plate is installed outside the sealing sleeve, and the sheath pressing plate is provided with a limiting part. The sealing sleeve is provided with a wrapping part wrapping the cable, a slim hole is formed in the sealing sleeve, the cable is provided with a cable branch matched with the slim hole, the sealing sleeve is provided with a conical part, and the conical part is in interference fit with the through hole in the mounting groove. The utility model has the advantages that the float switch is connected in series with the cable, so that sealing elements of an electronic part are reduced; the thin holes and the cable branch wires are extruded through cooperation of the conical parts and the through holes, the wrapping parts are arranged to wrap the cable wires, and the sealing performance is improved.

Description

Technical Field

[0001] The utility model belongs to the field of submersible pumps and relates to a submersible pump, in particular to a sealing structure of a liquid level controlled submersible pump. Background Art

[0002] Submersible pumps are important equipment for deep well water extraction. When in use, the entire unit is submerged in water to work. Extracting groundwater to the surface is used for domestic water, mine rescue, industrial cooling, farmland irrigation, seawater lifting, ship loading, and fountain landscapes. It can also be used to extract groundwater from deep wells and can also be used in water extraction projects such as rivers, reservoirs, and canals.

[0003] In order to achieve automatic control, the submersible pump will be additionally installed with a float switch. After the float switch detects the water level change, the submersible pump is automatically turned on and off. In order to simplify the structure, some submersible pumps will install the float switch and cable in one place. However, the float switch will continue to move due to the influence of the water flow, causing the seal to be rubbed and gaps to appear. Water flows into the motor room through the gap, causing the motor to short circuit and be damaged. Utility Model Content

[0004] The utility model aims to solve the above problems in the prior art and provides a sealing structure for a liquid level control submersible pump which can prevent the sealing performance of a sealing member from deteriorating after repeated activities of a float switch.

[0005] The utility model can be realized through the following technical scheme: a sealing structure of a liquid level controlled submersible pump, comprising a barrel, a pump body and a motor, wherein the motor is installed in the barrel, a bearing end cover is installed above the barrel, an extrusion chamber is arranged on the bearing end cover, a mounting groove is opened in the bearing end cover, a sealing sleeve is installed in the mounting groove, a cable is installed in the sealing sleeve, a float switch is connected in series on the cable, and a sheath pressure plate is installed outside the sealing sleeve.

[0006] In the sealing structure of the liquid level control submersible pump, a limiting portion is provided on the jacket pressure plate, and the limiting portion is in contact with the sealing sleeve.

[0007] In the sealing structure of the liquid level control submersible pump, a covering portion is provided on the sealing sleeve, and the covering portion covers the cable.

[0008] In the sealing structure of the liquid level control submersible pump, a step is provided in the sealing sleeve, a plurality of fine holes are provided on the step, a cable branch line is provided on the cable line, and a cable branch line is installed in the fine holes.

[0009] In the above-mentioned sealing structure of the liquid level control submersible pump, a connector is installed on the cable branch line.

[0010] In the sealing structure of the liquid level control submersible pump described above, a protrusion is provided on the extrusion chamber, and the protrusion is located above the sheath pressure plate.

[0011] In the sealing structure of the liquid level control submersible pump, the sealing sleeve is provided with a cone, the cone is provided with a chamfer, the mounting groove is provided with a through hole, and the diameter of the through hole is smaller than the diameter of the cone.

[0012] Compared with the prior art, the advantages of the utility model are: the float switch is connected in series with the cable to reduce the impact of the float switch on the cable when it swings; a covering portion is provided, which can effectively cover the cable to prevent gaps from appearing in the sealing when the cable is pulled by the float switch; the sealing gasket is compacted by the sheath pressure plate to prevent the sealing sleeve from detaching from the installation groove; a cone portion and a through hole are provided, and the through hole presses the cone portion through an interference fit between the cone portion and the through hole to improve the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a cross-sectional view of the sealing structure of a level-controlled submersible pump.

[0014] Figure 2 It is a cross-sectional view of a sealing sleeve of a sealing structure of a liquid level control submersible pump;

[0015] Figure 3 yes Figure 1 Enlarged view in circle A;

[0016] Among them, 1. barrel; 2. pump body; 3. motor; 4. bearing end cover; 41. mounting groove; 411. fine hole; 5. extrusion chamber; 51. protrusion; 6. sealing sleeve; 61. covering part; 62. step; 621. through hole; 63. cone; 631. chamfer; 7. cable; 71. float switch; 72. cable branch; 721. joint; 8. sheath pressure plate; 81. limit part. DETAILED DESCRIPTION

[0017] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0018] like Figures 1 to 3 As shown, the utility model can be implemented through the following embodiments: a sealing structure of a liquid level controlled submersible pump, comprising a barrel 1, a pump body 2 and a motor 3, the motor 3 being installed in the barrel 1, a bearing end cover 4 being installed above the barrel 1, an extrusion chamber 5 being arranged on the bearing end cover 4, a mounting groove 41 being opened in the bearing end cover 4, a sealing sleeve 6 being installed in the mounting groove 41, a cable 7 being installed in the sealing sleeve 6, a float switch 71 being connected in series on the cable 7, and a sheath pressure plate 8 being installed outside the sealing sleeve 6.

[0019] The float switch 71 is connected in series to the cable 7, so that when the float switch 71 moves under the influence of water flow, only the cable 7 is pulled. While simplifying the structure, the influence of the float switch 71 on the sealing structure when it moves is also reduced; the sheath pressure plate 8 is installed on the bearing end cover 4 by screws (not shown in the drawings), which is used to tighten and contract the sealing sleeve 6 to improve the sealing effect of the sealing sleeve 6. At the same time, the sheath pressure plate 8 also plays a certain sealing role.

[0020] like Figure 1 and Figure 3 As shown, a limiting portion is provided on the sheath pressing plate 8, and the limiting portion contacts the sealing sleeve 6. The limiting portion is used to press the sealing sleeve 6 to prevent the sealing sleeve 6 from moving upward due to the pulling of the cable 7, resulting in reduced sealing performance. At the same time, the limiting portion cooperates with other parts of the sheath pressing plate 8 to tighten the sealing sleeve 6 so that the sealing sleeve 6 is tightly attached to the cable 7.

[0021] like Figures 1 to 3 As shown, the sealing sleeve 6 is provided with a covering portion 61, which covers the cable 7. The covering portion 61 covers the cable 7, so that when the cable 7 is deformed, the covering portion 61 is deformed in coordination with the cable 7, thereby reducing the possibility of a gap between the cable 7 and the sealing sleeve 6 and improving the sealing performance.

[0022] like Figures 1 to 3 As shown, a step 62 is provided in the sealing sleeve 6, a plurality of fine holes 411 are provided on the step 62, a cable branch line 72 is provided on the cable line 7, and the cable branch line 72 is installed in the fine holes 411. The step 62 is used to block the cable line 7 and improve the sealing performance. The squeezing of the cable line 7 allows the sealing sleeve 6 to further fit with the mounting groove 41, thereby improving the sealing performance. The diameter of the cable branch line 72 is smaller than that of the cable line 7. At the same time, the cable branch lines 72 can squeeze each other when located in the fine holes 411, thereby making the cable branch line 72 fit more closely with the sealing sleeve 6, and are less likely to move when pulled, and it is difficult to produce a gap. The smaller diameter of the cable branch line 72 also means that the cable branch line 72 is more flexible and can support a greater degree of deformation, so that it is easy to fit with the sealing sleeve 6 and improve the sealing performance.

[0023] like Figure 1 and Figure 3 As shown, a connector 721 is installed on the cable branch 72. The setting of the connector 721 is convenient for the staff to pass the cable branch 72 through the fine hole 411 and assemble and connect the cable branch 72 and the motor 3. The connector 721 is also convenient for ensuring that the circuit is unobstructed when the cable 7 is pulled by the float switch 71.

[0024] like Figure 1 and Figure 3As shown, a protrusion 51 is provided on the extrusion chamber 5, and the protrusion 51 is located above the jacket pressing plate 8. The protrusion 51 is used to limit the position of the jacket pressing plate 8, and even if the connection between the jacket pressing plate 8 and the bearing end cover 4 is loosened, the sealing sleeve 6 and the protrusion 51 will squeeze and fix the jacket pressing plate 8 to prevent the jacket pressing plate 8 from falling off.

[0025] like Figure 1 and Figure 3 As shown, the sealing sleeve 6 is further provided with a cone 63, and the cone 63 is provided with a chamfer 631. The mounting groove 41 is provided with a through hole 621, and the diameter of the through hole 621 is smaller than the diameter of the cone 63. The chamfer 631 on the cone 63 is used to allow the cone 63 to pass through the through hole 621. Through the interference fit between the cone 63 and the through hole 621, the through hole 621 squeezes the cone 63, so that the through hole 621 and the sealing sleeve 6 are closely fitted, and further by squeezing the fine hole 411, it is ensured that the lower end of the fine hole 411 is closely attached to the cable branch line 72, thereby improving the sealing performance.

[0026] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0027] Although various terms are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A sealing structure for a liquid level controlled submersible pump, comprising a barrel (1), a pump body (2) and a motor (3), wherein the motor (3) is installed in the barrel (1), and a bearing end cover (4) is installed above the barrel (1), characterized in that: The bearing end cover (4) is provided with an extrusion chamber (5), a mounting groove (41) is provided in the bearing end cover (4), a sealing sleeve (6) is installed in the mounting groove (41), a cone (63) is provided on the sealing sleeve (6), a chamfer (631) is provided on the cone (63), a through hole (621) is provided on the mounting groove (41), the diameter of the through hole (621) is smaller than the diameter of the cone (63), a cable (7) is installed in the sealing sleeve (6), a float switch (71) is connected in series on the cable (7), and a sheath pressure plate (8) is installed outside the sealing sleeve (6).

2. The sealing structure of a liquid level controlled submersible pump according to claim 1, characterized in that: A limiting portion is provided on the sheath pressing plate (8), and the limiting portion is in contact with the sealing sleeve (6).

3. The sealing structure of a liquid level controlled submersible pump according to claim 1, characterized in that: The sealing sleeve (6) is provided with a covering portion (61), and the covering portion (61) covers the cable (7).

4. The sealing structure of a liquid level controlled submersible pump according to claim 1, characterized in that: A step (62) is provided in the sealing sleeve (6), a plurality of through holes (621) are provided on the step (62), and cable distribution lines (72) are installed in the through holes (621).

5. The sealing structure of a liquid level controlled submersible pump according to claim 4, characterized in that: A connector (721) is installed on the cable branch line (72).

6. The sealing structure of a liquid level controlled submersible pump according to claim 1, characterized in that: The extrusion chamber (5) is provided with a protrusion (51), and the protrusion (51) is located above the sheath pressing plate (8).

Images