Front end suction device and method of submersible pump

Abstract

The present invention discloses a front-end suction device and method of a submersible pump, which relates to the field of power engineering equipment, and includes: a pump end cover, an impeller chamber is defined in the pump end cover, a main shaft is arranged in the pump end cover, a first chamber is formed between the main shaft and the pump end cover, a first boosting ring is fixedly arranged on the main shaft, a second chamber is defined in the boosting middle section, one end of the boosting middle section is detachably connected to the first boosting ring through a first piston mechanism, and the other end is fixedly connected to a boosting shaft, a boosting impeller is fixedly arranged on the boosting shaft, and a second piston mechanism is fixedly connected to the pump end cover. The boosting middle section is arranged to be detachably connected to the first boosting ring, and the boosting middle section can be driven to separate from the first boosting ring through the second piston mechanism, and the technical effect of stopping the boosting middle section, the boosting shaft and the boosting impeller can be achieved after the submersible pump is fully started, which solves the problem of idling of the boosting impeller and energy waste after the submersible pump is fully started.

Description

Technical Field

[0001] The invention relates to the field of power engineering equipment, and in particular to a front-end suction device and method of a submersible pump. Background Art

[0002] Submersible pumps are used in coal mine water seepage rescue scenarios. The coal mine water seepage rescue environment is complex and diverse, especially when there is water accumulation in holes, and a large amount of water is blocked by small-diameter holes. If the inlet diameter of the submersible pump is too large, it cannot enter the hole, affecting normal rescue drainage. The use of small-diameter imported submersible pumps can solve the above problems, but small-diameter imported submersible pumps need to use booster impellers to assist in suction work at the initial startup. After the submersible pump is fully started, the booster impeller can provide a very small head, which has no substantial effect in the subsequent drainage process, resulting in the problem of idling of the booster impeller and energy waste.

[0003] In view of this, how to provide a submersible pump that can solve the above-mentioned technical problems is a technical problem that people in this field need to solve urgently. Summary of the invention

[0004] The purpose of the present invention is to provide a front end suction device of a submersible pump to solve the problems existing in the prior art.

[0005] To achieve the above object, the present invention provides the following solution: The present invention provides a front-end suction device of a submersible pump, comprising:

[0006] a pump end cover, wherein an impeller chamber is defined in the pump end cover;

[0007] A main shaft, wherein the main shaft is disposed in the pump end cover, a first chamber is formed between the main shaft and the pump end cover, and the first chamber is communicated with the impeller chamber;

[0008] A first boosting ring, wherein the first boosting ring is fixedly disposed on the main shaft;

[0009] A boosting middle section, wherein a second chamber is defined in the boosting middle section, one end of the boosting middle section is detachably connected to the first boosting ring through a first piston mechanism, and the other end is fixedly connected to a boosting shaft, on which a boosting impeller is fixedly arranged; the boosting middle section is provided with a plurality of middle section through holes penetrating the front and rear surfaces, and the plurality of middle section through holes respectively connect the second chamber with the first chamber and the water inlet of the pump end cover, and the boosting impeller is arranged close to the water inlet of the pump end cover;

[0010] The second piston mechanism is fixedly connected to the pump end cover. When the boost mid-section and the first boost ring are released from detachable connection, the second piston mechanism can drive the boost mid-section to move toward the first chamber until the boost mid-section is separated from the first boost ring.

[0011] Furthermore, it also includes:

[0012] A carrier, wherein the carrier is fixedly arranged on the main shaft and adjacent to the first boost ring, wherein a ball is arranged on the carrier, wherein the ball is flush with the outer surface of the first boost ring, and wherein the boost middle section can be slidably connected with the ball. When the boost middle section is separated from the first boost ring, the boost middle section slides along the ball to the outside of the carrier.

[0013] Furthermore, the carrier is a second booster ring.

[0014] Furthermore, the first piston mechanism comprises:

[0015] A first channel, wherein the first channel is opened on the outer side of the first pressurizing ring, the first channel has an upper opening, and a pressure ring is disposed at the upper opening of the first channel;

[0016] a first piston, wherein the first piston is disposed in the first channel, a first spring is disposed between the first piston and a bottom surface of the first channel, and the first piston is fixedly connected to a first piston rod;

[0017] A second channel, the booster middle section is provided with a second channel corresponding to the position and shape of the first piston rod, the first piston rod seal passes through the pressure ring and can extend into the second channel;

[0018] The third channel is arranged in the first boosting ring, and a first piston cavity is formed between the first piston and the pressure ring. One end of the third channel is connected to the first piston cavity, and the other end is connected to the second chamber.

[0019] Furthermore, the second piston mechanism comprises:

[0020] A piston cylinder, wherein a fourth channel is defined inside the piston cylinder, and the piston cylinder is fixedly connected to the pump end cover, and the connection point is close to the water inlet of the pump end cover;

[0021] A second piston, the second piston is arranged in the piston cylinder, a second spring is arranged between the second piston and an end surface of the piston cylinder away from the booster middle section, the second piston is fixedly connected to a second piston rod, the second piston rod seal passes through the piston cylinder and contacts the booster middle section, and a friction ring is arranged at the contact point;

[0022] The fifth channel is located in the pump end cover, and a second piston chamber is formed between the second piston and an end face of the piston cylinder away from the booster middle section. One end of the fifth channel is connected to the second piston chamber, and the other end is connected to the impeller chamber.

[0023] The present invention also provides a front-end suction method of a submersible pump, which uses the front-end suction device of the submersible pump and comprises the following steps:

[0024] The submersible pump is started. When the submersible pump does not reach the preset working pressure, the first piston rod is located in the second channel; the rotation of the main shaft drives the carrier, the first boost ring, the boost middle section, the boost shaft and the boost impeller to rotate in sequence, and water enters the water inlet at the front end of the pump, and the water flows into the second chamber from the middle section through hole on one side of the second chamber, and then enters the first chamber from the middle section through hole on the other side of the second chamber, and finally is discharged from the impeller chamber;

[0025] When the submersible pump reaches the preset working pressure, the water in the second chamber enters the first piston chamber along the third channel, water pressure is generated in the first piston chamber and presses down the first piston, the first piston rod overcomes the elastic force of the first spring and withdraws from the second channel, and the first boost ring and the boost middle section are released from the detachable connection; the water in the impeller chamber enters the second piston chamber along the fifth channel, water pressure is generated in the second piston chamber and pushes the second piston rod together with the second spring, the second piston rod drives the boost middle section to move along the ball toward the first chamber until the boost middle section is separated from the first boost ring, at this time the boost middle section is slidably connected to the carrier through the ball, and the rotation of the main shaft drives the carrier and the first boost ring to rotate in turn, and the boost middle section, the boost shaft and the boost impeller do not rotate.

[0026] The present invention discloses the following technical effects:

[0027] 1. The boosting middle section is set to be detachably connected to the first boosting ring, and can be driven to separate from the first boosting ring by the second piston mechanism, which can achieve the technical effect of stopping the boosting middle section, the boosting shaft and the boosting impeller after the submersible pump is fully started, thereby solving the problem of idling of the boosting impeller and energy waste after the submersible pump is fully started.

[0028] 2. A carrier is arranged adjacent to the first boost ring, and the carrier may select the second boost ring. A ball bearing is arranged above the carrier, and when the boost middle section is separated from the first boost ring, it can slide along the ball bearing to the outside of the carrier. When the main shaft drives the first boost ring and the second boost ring to rotate, the boost middle section is slidably connected with the ball bearing, and it can remain stationary relative to the main shaft.

[0029] 3. Both the first piston mechanism and the second piston mechanism are driven by the water pressure generated after the submersible pump is fully started. The first piston chamber is located between the first piston and the pressure ring, the second piston chamber is located between the second piston and the end face of the piston cylinder away from the booster middle section, the first piston chamber is connected to the second chamber, and the second piston chamber is connected to the impeller chamber. After the submersible pump is fully started, the first piston chamber and the second piston chamber generate water pressure and can release the detachable connection between the booster middle section and the first booster ring, separate the booster middle section from the first booster ring, and realize the shutdown of the booster middle section, the booster shaft and the booster impeller. The whole process does not require manual intervention, the structural change process is fully automatic and has no power unit, good stability, and a high degree of automation and intelligence. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 for Figure 1 The enlarged schematic diagram at A in the middle;

[0033] Figure 3 for Figure 2 The enlarged schematic diagram of point B in the middle;

[0034] Figure 4 It is a schematic diagram of the supercharged mid-section structure;

[0035] Figure 5 It is the state before the submersible pump is started and when the preset working pressure has not been reached in the initial stage of startup;

[0036] Figure 6 It is the state when the submersible pump reaches the preset working pressure after starting;

[0037] Among them, 1. boost shaft; 2. boost impeller; 3. boost middle section; 301. middle section through hole; 302. second channel; 4. first boost ring; 401. third channel; 402. first channel; 5. carrier; 6. ball; 7. main shaft; 8. pump end cover; 801. fifth channel; 802. first chamber; 803. second chamber; 804. water inlet; 805. impeller chamber; 9. friction ring; 10. second piston rod; 11. piston cylinder; 1101. fourth channel; 12. second spring; 13. pressure ring; 14. first piston rod; 15. first spring. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] Reference Figure 1-Figure 6 The present invention provides a front-end suction device of a submersible pump, comprising: a pump end cover 8, an impeller chamber 805 is defined in the pump end cover 8, a main shaft 7 is arranged in the pump end cover 8, a first chamber 802 is formed between the main shaft 7 and the pump end cover 8, and the first chamber 802 is communicated with the impeller chamber 805, such as Figure 1 and Figure 2 As shown, the first boost ring 4 is fixedly arranged on the main shaft 7, and the second chamber 803 is defined in the boost middle section 3. One end of the boost middle section 3 is detachably connected to the first boost ring 4 through the first piston mechanism, and the other end is fixedly connected to the boost shaft 1. The boost impeller 2 is fixedly arranged on the boost shaft 1. The boost middle section 3 is provided with a plurality of middle section through holes 301 running through the front and rear surfaces. The plurality of middle section through holes 301 respectively connect the second chamber 803 with the first chamber 802 and the water inlet 804 of the pump end cover 8, and the boost impeller 2 is arranged near the water inlet 804 of the pump end cover 8; the second piston mechanism is fixedly connected to the pump end cover 8, and when the boost middle section 3 is released from the detachable connection with the first boost ring 4, the second piston mechanism can drive the boost middle section 3 to move toward the first chamber 802 until the boost middle section 3 is separated from the first boost ring 4.

[0041] like Figure 2 As shown, in this embodiment, it also includes: a carrier 5, which is a second boost ring. The carrier 5 is fixedly arranged on the main shaft 7 and is arranged adjacent to the first boost ring 4. The carrier 5 is provided with a ball 6. The ball 6 is flush with the outer surface of the first boost ring 4. The boost middle section 3 can be slidably connected with the ball 6. When the boost middle section 3 is separated from the first boost ring 4, the boost middle section 3 slides along the ball 6 to the outside of the carrier 5.

[0042] like Figure 3As shown, the first piston mechanism includes: a first channel 402, which is opened on the outer side of the first boost ring 4, and has an upper opening, and the upper opening of the first channel 402 is provided with a pressure ring 13; the first piston is arranged in the first channel 402, and a first spring 15 is arranged between the first piston and the bottom surface of the first channel 402, and the first piston is fixedly connected to the first piston rod 14; the boost middle section 3 is provided with a second channel 302 corresponding to the position and shape of the first piston rod 14, and the first piston rod 14 is sealed and passes through the pressure ring 13 and can extend into the second channel 302; the third channel 401 is arranged in the first boost ring 4, and a first piston cavity is formed between the first piston and the pressure ring 13, and one end of the third channel 401 is connected to the first piston cavity, and the other end is connected to the second chamber 803.

[0043] like Figure 2 As shown, the second piston mechanism includes: a piston cylinder 11, a fourth channel 1101 is defined inside the piston cylinder 11, the piston cylinder 11 is fixedly connected to the pump end cover 8, and the connection is close to the water inlet 804 of the pump end cover 8; a second piston, the second piston is arranged in the piston cylinder 11, a second spring 12 is arranged between the second piston and the end face of the piston cylinder 11 away from the booster middle section 3, the second piston is fixedly connected to the second piston rod 10, the second piston rod 10 seals and passes through the piston cylinder 11 and contacts with the booster middle section 3, and a friction ring 9 is arranged at the contact point; the fifth channel 801 is located in the pump end cover 8, and a second piston cavity is formed between the second piston and the end face of the piston cylinder 11 away from the booster middle section 3, one end of the fifth channel 801 is connected to the second piston cavity, and the other end is connected to the impeller chamber 805.

[0044] The front end suction method of the submersible pump is specifically described below in combination with the above embodiment, including the following steps:

[0045] like Figure 1 , Figure 3 and Figure 5 As shown, the submersible pump is started. When the submersible pump does not reach the preset working pressure, the first piston rod 14 is located in the second channel 302; the main shaft 7 rotates to sequentially drive the carrier 5, the first boost ring 4, the boost middle section 3, the boost shaft 1 and the boost impeller 2 to rotate, and water enters the water inlet 804 at the front end of the pump, and the water flows into the second chamber 803 from the middle section through hole 301 on one side of the second chamber 803, and then enters the first chamber 802 from the middle section through hole 301 on the other side of the second chamber 803, and finally is discharged from the impeller chamber 805;

[0046] When the submersible pump reaches the preset working pressure, the water in the second chamber 803 enters the first piston chamber along the third channel 401, the water pressure is generated in the first piston chamber and presses down the first piston, the first piston rod 14 overcomes the elastic force of the first spring 15 and withdraws from the second channel 302, and the first boosting ring 4 and the boosting middle section 3 are released from the detachable connection; the water in the impeller chamber 805 enters the second piston chamber along the fifth channel 801, the water pressure is generated in the second piston chamber and pushes the second piston rod 10 together with the second spring 12, the second piston rod 10 drives the boosting middle section 3 to move along the ball 6 toward the first chamber 802, during the movement, the second chamber 803 gradually becomes smaller, the boosting middle section 3 is separated from the first boosting ring 4, and finally the boosting middle section 3 moves to Figure 5 In the position shown, the boost middle section 3 is located outside the carrier 5 and the ball 6 and is slidingly connected to the carrier 5 through the ball 6. When the main shaft 7 rotates, it can drive the carrier 5 and the first boost ring 4 to rotate in turn, while the boost middle section 3, the boost shaft 1 and the boost impeller 2 do not rotate.

[0047] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, 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 present invention. The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solution of the present invention by ordinary technicians in this field should all fall within the scope of protection determined by the claims of the present invention.

Claims

1. A front end suction device of a submersible pump, characterized in that: include: A pump end cover (8), wherein an impeller chamber (805) is defined in the pump end cover (8); A main shaft (7), wherein the main shaft (7) is arranged in the pump end cover (8), a first chamber (802) is formed between the main shaft (7) and the pump end cover (8), and the first chamber (802) is communicated with the impeller chamber (805); A first boosting ring (4), the first boosting ring (4) being fixedly arranged on the main shaft (7); A boosting middle section (3), wherein a second chamber (803) is defined in the boosting middle section (3), one end of the boosting middle section (3) is detachably connected to the first boosting ring (4) via a first piston mechanism, and the other end is fixedly connected to the boosting shaft (1), and a boosting impeller (2) is fixedly arranged on the boosting shaft (1); the boosting middle section (3) is provided with a plurality of middle section through holes (301) penetrating the front and rear surfaces, and the plurality of middle section through holes (301) respectively connect the second chamber (803) with the first chamber (802) and the water inlet (804) of the pump end cover (8), and the boosting impeller (2) is arranged close to the water inlet (804) of the pump end cover (8); A second piston mechanism, the second piston mechanism is fixedly connected to the pump end cover (8), and when the detachable connection between the boosting middle section (3) and the first boosting ring (4) is released, the second piston mechanism can drive the boosting middle section (3) to move toward the first chamber (802) until the boosting middle section (3) is separated from the first boosting ring (4).

2. A front end suction device of a submersible pump according to claim 1, characterized in that: Also includes: A carrier (5), wherein the carrier (5) is fixedly arranged on the main shaft (7) and is arranged adjacent to the first boost ring (4), and a ball (6) is arranged on the carrier (5), and the ball (6) is flush with the outer surface of the first boost ring (4), and the boost middle section (3) can be slidably connected with the ball (6), and when the boost middle section (3) is separated from the first boost ring (4), the boost middle section (3) slides along the ball (6) to the outside of the carrier (5).

3. A front end suction device of a submersible pump according to claim 2, characterized in that: The carrier (5) is a second booster ring.

4. A front end suction device of a submersible pump according to claim 2, characterized in that: The first piston mechanism comprises: A first channel (402), the first channel (402) being opened on the outer side of the first boosting ring (4), the first channel (402) having an upper opening, and a pressure ring (13) being provided at the upper opening of the first channel (402); a first piston, the first piston being disposed in the first channel (402), a first spring (15) being disposed between the first piston and a bottom surface of the first channel (402), and the first piston being fixedly connected to a first piston rod (14); A second channel (302), wherein the booster middle section (3) is provided with the second channel (302) in a position and shape corresponding to the first piston rod (14), and the first piston rod (14) seals and penetrates the pressure ring (13) and can extend into the second channel (302); A third channel (401), wherein the third channel (401) is arranged in the first boosting ring (4), and a first piston chamber is formed between the first piston and the pressure ring (13); one end of the third channel (401) is connected to the first piston chamber, and the other end is connected to the second chamber (803).

5. A front end suction device of a submersible pump according to claim 4, characterized in that: The second piston mechanism comprises: A piston cylinder (11), wherein a fourth channel (1101) is defined inside the piston cylinder (11), and the piston cylinder (11) is fixedly connected to the pump end cover (8), with the connection point being close to the water inlet (804) of the pump end cover (8); A second piston, the second piston is arranged in the piston cylinder (11), a second spring (12) is arranged between the second piston and an end surface of the piston cylinder (11) away from the booster middle section (3), the second piston is fixedly connected to a second piston rod (10), the second piston rod (10) seals through the piston cylinder (11) and contacts the booster middle section (3), and a friction ring (9) is arranged at the contact point; A fifth channel (801), the fifth channel (801) is located in the pump end cover (8), a second piston chamber is formed between the second piston and an end surface of the piston cylinder (11) away from the booster middle section (3), one end of the fifth channel (801) is connected to the second piston chamber, and the other end is connected to the impeller chamber (805).

6. A front end suction method of a submersible pump, characterized in that: The front end suction device of the submersible pump according to claim 5 comprises the following steps: The submersible pump is started. When the submersible pump does not reach the preset working pressure, the first piston rod (14) is located in the second channel (302); the main shaft (7) rotates to sequentially drive the carrier (5), the first boost ring (4), the boost middle section (3), the boost shaft (1) and the boost impeller (2) to rotate, and water enters the water inlet (804) at the front end of the pump. The water flows into the second chamber (803) from the middle section through hole (301) on one side of the second chamber (803), and then enters the first chamber (802) from the middle section through hole (301) on the other side of the second chamber (803), and is finally discharged from the impeller chamber (805); When the submersible pump reaches a preset working pressure, the water in the second chamber (803) enters the first piston chamber along the third channel (401), water pressure is generated in the first piston chamber and presses down the first piston, the first piston rod (14) overcomes the elastic force of the first spring (15) and withdraws from the second channel (302), and the first booster ring (4) and the booster middle section (3) are released from the detachable connection; the water in the impeller chamber (805) enters the second piston chamber along the fifth channel (801), and water pressure is generated in the second piston chamber. The second piston rod (10) is pushed together with the second spring (12), and the second piston rod (10) drives the boost middle section (3) to move along the ball (6) toward the first chamber (802) until the boost middle section (3) is separated from the first boost ring (4). At this time, the boost middle section (3) is slidably connected to the carrier (5) through the ball (6), and the main shaft (7) rotates to drive the carrier (5) and the first boost ring (4) to rotate in turn, while the boost middle section (3), the boost shaft (1) and the boost impeller (2) do not rotate.

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