Pumping unit and split type pump skid block thereof

Abstract

The invention discloses a pumping unit and a split type pump skid thereof. A switching valve, a water pump, a first hydraulic motor, a hydraulic branching mechanism and an exhaust valve are installed on a pumping unit support. Oil ways are connected between the hydraulic branching mechanism and the exhaust valve, between the hydraulic branching mechanism and the switching valve and between the hydraulic branching mechanism and the first hydraulic motor. A third through hole and a fourth through hole in the switching valve are respectively communicated with the first through hole and the second through hole in a sealed manner when water is pumped from the suction barrel, and the fourth through hole and a fifth through hole are respectively communicated with the first through hole and the second through hole in a sealed manner when air is exhausted from the suction barrel; the second through hole and the first through hole communicate with a water inlet pipeline and a first water outlet pipeline correspondingly and are used for communicating to an inlet and an outlet of a water pump. The third through hole communicates with a second water outlet pipeline, a communicating pipeline is connected between the fourth through hole and the exhaust valve, and the fifth through hole communicates with a filtering pipeline, so that a hydraulic driving mechanism can be adopted as a power source in deep water, an umbilical cable does not need to be adopted for power supply, and the use cost is effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of offshore wind power installation, and in particular to a pump suction unit and a split pump skid thereof. Background Art

[0002] The pump skid in the prior art is usually placed on the top of the suction cylinder and fixed to the top of the suction cylinder by a special locking device. The pump skid can pump seawater from one suction cylinder, or from multiple suction cylinders through a diversion device. The patent document with application number 202211351744.9 discloses a pump skid assembly and a conductor frame for a multi-pile suction cylinder. The skid integrates a double submersible pump, a three-way pipe, an injection pipe, an underwater hydraulic power station, multiple hydraulic control valves, and multiple hydraulic cylinders, but can only be used in shallow water. The patent document with application number 2010147413.7 discloses a pump skid commonly used for an offshore wind turbine suction barrel foundation sink. Different from the content disclosed in the patent document, the patent document discloses a pump skid commonly used for an offshore wind turbine suction barrel foundation sink. It discloses the use of up to four water pumps, each water pump cooperates with a pair of three-ways, and the three-way valve is switched by an electric head to switch the management between water injection and water pumping. This patent does not integrate an underwater hydraulic control power station and uses pure electric control, but it is also only able to operate in shallow water. Summary of the invention

[0003] The object of the present invention is to provide a pumping unit and a split pump skid thereof to solve the problems existing in the above-mentioned prior art, so as to be able to use a hydraulic drive mechanism as a power source in deep water without the need for umbilical cable power supply, thereby effectively reducing the cost of use.

[0004] To achieve the above-mentioned object, the present invention provides the following solution: The present invention provides a pumping unit, comprising a pumping unit bracket detachably mounted on a suction cylinder;

[0005] The pump unit bracket is equipped with a switching valve, a water pump, a first hydraulic motor driving the water pump, a hydraulic branch mechanism connected to the hydraulic drive mechanism, and an exhaust valve installed at the water outlet of the suction cylinder; an oil circuit is connected between the hydraulic branch mechanism and the exhaust valve, the switching valve and the first hydraulic motor;

[0006] A first through hole and a second through hole are provided on one side of the switching valve, and a third through hole, a fourth through hole and a fifth through hole are provided on the other side. The third through hole and the fourth through hole are sealed and connected with the first through hole and the second through hole respectively when the suction cylinder is pumping water, and the fourth through hole and the fifth through hole are sealed and connected with the first through hole and the second through hole respectively when the suction cylinder is exhausted; the second through hole and the first through hole are respectively connected with a water inlet pipe and a first water outlet pipe, and the water inlet pipe and the first water outlet pipe are respectively connected to the inlet and outlet of the water pump; the third through hole is connected with the second water outlet pipe, a connecting pipe is connected between the fourth through hole and the exhaust valve, and the fifth through hole is connected with a filter pipe.

[0007] Preferably, the switching valve is a sliding plate valve structure, the switching valve comprises a fixed plate and a sliding seat slidably mounted on the fixed plate, the sliding seat is connected to a driving mechanism driving the sliding, and the driving mechanism is connected to the hydraulic branch mechanism through an oil circuit;

[0008] The first through hole and the second through hole are arranged on the fixed plate at intervals along the sliding direction of the sliding seat, and the third through hole, the fourth through hole and the fifth through hole are arranged on the sliding seat in sequence at intervals along the sliding direction of the sliding seat; the third through hole and the fourth through hole are respectively connected with the first through hole and the second through hole when the sliding seat moves downward, and the fourth through hole and the fifth through hole are respectively connected with the first through hole and the second through hole when the sliding seat moves upward.

[0009] Preferably, the communicating pipe comprises two fixed sections respectively connected with the fourth through hole and the exhaust valve, and a telescopic joint which is telescopic and retractable along with the movement of the sliding seat is connected between the two fixed sections.

[0010] Preferably, the pushing mechanism includes switching cylinders arranged in pairs, the switching cylinders are symmetrically distributed on both sides of the sliding seat, one end of the switching cylinder is connected to the pump suction unit bracket, and the other end is connected to the sliding seat, and the cylinder bodies of the two switching cylinders are connected to the hydraulic branch mechanism through an oil circuit.

[0011] Preferably, the exhaust valve is a butterfly valve, and the exhaust valve is equipped with a second hydraulic motor for driving the exhaust valve to open and close, and the second hydraulic motor is connected to the hydraulic branch mechanism through an oil circuit.

[0012] Preferably, the pump suction unit bracket is also provided with a spiral elevator, the output end of the spiral elevator is connected to a locking cylinder that rotates synchronously with it, the output end of the locking cylinder is connected to a locking pin for locking on the suction cylinder, and the locking cylinder is connected to the hydraulic branch mechanism through an oil circuit.

[0013] A split pump skid is also provided, comprising the pump suction unit and a power unit detachably connected to the pump suction unit, the power unit comprising a power unit bracket, an underwater valve box, a hydraulic pump connected to the underwater valve box, and an underwater motor that drives the hydraulic pump are installed on the power unit bracket, detachable hydraulic pipelines are connected between the underwater valve box and the exhaust valve, the switching valve and the first hydraulic motor, the underwater valve box is equipped with an underwater control mechanism electrically connected to it, and the underwater control mechanism and the underwater motor are both connected to an umbilical cable that transmits electricity to them.

[0014] Preferably, the pumping unit is equipped with an underwater robot, and a blind hydraulic flying head is connected between the underwater robot and the hydraulic branching mechanism. The blind hydraulic flying head includes a detachable male head and a female head, the male head is installed on the underwater robot, and the female head is installed on the hydraulic branching mechanism.

[0015] Preferably, the umbilical cable is electrically connected to a junction box installed on the power unit bracket, and the junction box is respectively connected to a power cable and a control cable between the underwater motor and the underwater control mechanism.

[0016] Preferably, a monitoring mechanism is also installed on the pumping unit, and a pressure sensor, an inclination sensor and a display screen are integrated on the monitoring mechanism.

[0017] Compared with the prior art, the present invention has achieved the following technical effects:

[0018] In the prior art, umbilical cables are usually used to transmit electricity in shallow waters of less than 150 meters. If a cable solution is used in deep waters of 1500 meters, the umbilical cable must be a high-voltage cable (3000V or even 6000V), and the cost of the winch plus the cable is too expensive. Therefore, the entire device introduces hydraulic power through the use of a hydraulic drive mechanism, without the use of an umbilical cable, and can be used in waters at least 1500 meters deep, effectively reducing the cost of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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 labor.

[0020] Figure 1 The overall schematic diagram of the split pump skid in one embodiment of the present invention is as follows Figure 1 ;

[0021] Figure 2 The overall schematic diagram of the split pump skid in one embodiment of the present invention is as follows Figure 2 ;

[0022] Figure 3 This is a schematic diagram of the use of a split pump skid in one embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the sliding seat when it is moving upward in one embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of the sliding seat when it is moving downward in one embodiment of the present invention;

[0025] Among them, 1- underwater valve box, 2- hydraulic pump, 3- underwater motor, 4- power unit bracket, 5- display screen, 6- pressure sensor, 7- pump suction unit bracket, 8- tilt sensor, 9- female head, 10- exhaust valve, 11- fixed plate, 12- second water outlet pipe, 13- sliding seat, 14- fixed section, 15- telescopic joint, 16- switching cylinder, 17- second hydraulic motor, 18- water inlet pipe, 19- first hydraulic motor, 20- water pump, 21- first water outlet pipe, 22- Filter pipe, 23-power unit, 24-pumping unit, 25-winch, 26-umbilical cable, 27-junction box, 28-power cable, 29-control cable, 30-underwater control mechanism, 31-hydraulic pipeline, 32-locking cylinder, 33-oil circuit, 34-hydraulic branch mechanism, 35-switch knob, 36-male head, 37-underwater robot, 28-pushing mechanism, 29-third through hole, 30-fourth through hole, 31-fifth through hole, 32-first through hole, 33-second through hole. DETAILED DESCRIPTION

[0026] 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.

[0027] The object of the present invention is to provide a pumping unit and a split pump skid thereof to solve the problems existing in the above-mentioned prior art, so as to be able to use a hydraulic drive mechanism as a power source in deep water without the need for umbilical cable power supply, thereby effectively reducing the cost of use.

[0028] 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.

[0029] like Figures 1 to 3As shown, the present embodiment provides a pumping unit, including a pumping unit bracket 7 detachably mounted on a suction cylinder; a switching valve, a water pump 20, a first hydraulic motor 19 driving the water pump 20, a hydraulic branch mechanism 34 connected to a hydraulic driving mechanism, and an exhaust valve 10 mounted at a water outlet of the suction cylinder are mounted on the pumping unit bracket 7; an oil circuit 33 is connected between the hydraulic branch mechanism 34 and the exhaust valve 10, the switching valve and the first hydraulic motor 19, and preferably the oil circuit 33 adopts a hydraulic hose; the hydraulic driving mechanism respectively supplies oil to the exhaust valve 10 through the hydraulic branch mechanism 34 and the oil circuit 33 0. The switching valve and the first hydraulic motor 19 supply hydraulic oil to provide a power source. Preferably, the hydraulic drive mechanism selects an underwater robot 37 (ROV) as a power source, that is, the hydraulic power is introduced to the exhaust valve 10, the switching valve and the first hydraulic motor 19 through the underwater robot 37. Each oil circuit 33 is equipped with a switch knob 35 for realizing the on-off of the oil circuit 33. Each switch knob 35 is installed on the hydraulic branch mechanism 34, and each action of the exhaust valve 10, the switching valve and the first hydraulic motor 19 is completed by the manipulator of the underwater robot 37 to control the switch knob 35.

[0030] Among them, a first through hole 32 and a second through hole 33 are opened on one side of the switching valve, and a third through hole 29, a fourth through hole 30 and a fifth through hole 31 are opened on the other side. The third through hole 29 and the fourth through hole 30 are sealed and connected with the first through hole 32 and the second through hole 33 respectively when the suction cylinder is pumping water, and the fourth through hole 30 and the fifth through hole 31 are sealed and connected with the first through hole 32 and the second through hole 33 respectively when the suction cylinder is exhausted; the second through hole 33 and the first through hole 32 are respectively connected with the water inlet pipe 18 and the first water outlet pipe 21, and the water inlet pipe 18 and the first water outlet pipe 21 are respectively connected to the inlet and outlet of the water pump 20; the third through hole 29 is connected with the second water outlet pipe 12, a connecting pipe is connected between the fourth through hole 30 and the exhaust valve 10, and the fifth through hole 31 is connected with the filter pipe 22. Specifically, during the process of lowering the suction cylinder, hydraulic oil is supplied to the exhaust valve 10 through the hydraulic branch mechanism 34 and the oil circuit 33 to drive the exhaust valve 10 to open. During the process of lowering the suction cylinder, the exhaust valve 10 is kept open to ensure that there is no air in the suction cylinder. When the suction cylinder is completely sunk by its own weight, hydraulic oil is supplied to the exhaust valve 10 through the hydraulic branch mechanism 34 and the oil circuit 33 to drive the exhaust valve 10 to close, sealing the water outlet of the suction cylinder so that the suction cylinder is in a closed state. The switching valve is driven by the hydraulic branch mechanism 34 and the oil circuit 33 to operate so that the first through hole 32 and the second through hole 33 are connected to the fourth through hole 30 and the fifth through hole 31 respectively, and then hydraulic oil is supplied to the first hydraulic motor 19 through the hydraulic branch mechanism 34 and the oil circuit 33 to drive the first hydraulic motor 19 to operate, so that the water flow can be filtered through the filter pipe 22, guided by the water pump 20 and introduced into the suction cylinder through the connecting pipe. The switching valve is driven by the hydraulic branch mechanism 34 and the oil circuit 33 to operate, so that the first through hole 32 and the second through hole 33 are connected to the third through hole 29 and the fourth through hole 30 respectively, and then the hydraulic oil is supplied to the first hydraulic motor 19 through the hydraulic branch mechanism 34 and the oil circuit 33 to drive the first hydraulic motor 19 to operate so as to be able to extract the water flow in the suction cylinder through the connecting pipe. Thus, the switching between water absorption and drainage of the suction cylinder is completed. In summary, in the prior art, in shallow water within 150m, the umbilical cable 26 is usually used to transmit electricity. If a cable solution is used in deep water of 1500m, the umbilical cable 26 must be a high-voltage cable (3000v or even 6000v), and the cost of the winch 25 plus the cable is too expensive. Therefore, the entire device introduces hydraulic power by adopting a hydraulic drive mechanism, and can be used in at least 1500 meters of deep water without using the umbilical cable 26, which effectively reduces the cost of use.

[0031] In a specific embodiment, the switching valve is a sliding plate valve structure, which includes a fixed plate 11 and a sliding seat 13 slidably mounted on the fixed plate 11, the sliding seat 13 is connected to a pushing mechanism 28 that drives it to slide, and the pushing mechanism 28 is connected to a hydraulic branch mechanism 34 through an oil circuit 33; the first through hole 32 and the second through hole 33 are arranged on the fixed plate 11 at intervals along the sliding direction of the sliding seat 13, and the third through hole 29, the fourth through hole 30 and the fifth through hole 31 are arranged on the sliding seat 13 at intervals in sequence along the sliding direction of the sliding seat 13; the third through hole 29 and the fourth through hole 30 are respectively connected to the first through hole 32 and the second through hole 33 when the sliding seat 13 moves downward, and the fourth through hole 30 and the fifth through hole 31 are respectively connected to the first through hole 32 and the second through hole 33 when the sliding seat 13 moves upward. The hydraulic drive mechanism provides hydraulic power to the pushing mechanism 28 through the hydraulic branch mechanism 34 and the oil circuit 33, and then the sliding seat 13 slides along the fixed plate 11 through the pushing mechanism 28 to complete the conversion of the connection relationship between the through holes, thereby realizing the conversion of the water suction and drainage work of the suction cylinder.

[0032] In a specific embodiment, the communication pipe includes two fixed sections 14 respectively connected to the fourth through hole 30 and the exhaust valve 10, and a telescopic joint 15 that expands and contracts with the movement of the sliding seat 13 is connected between the two fixed sections 14, so that during the reciprocating movement of the sliding seat 13 along the fixed plate 11, the telescopic joint 15 can be adaptively extended or shortened, thereby ensuring that the sliding seat 13 can slide into place, and can ensure that the communication pipe can effectively connect the corresponding through hole and the suction cylinder on the sliding seat 13. Preferably, the telescopic joint 15 includes a connecting section with a cylindrical structure and a sliding section coaxially slidingly sealed and connected in the connecting section, the connecting section is fixedly connected to one fixed section 14, and the end of the sliding section that is not slidably matched with the connecting section is fixedly connected to the other fixed section 14.

[0033] In a specific embodiment, the pushing mechanism 28 includes switching cylinders 16 arranged in pairs, and the switching cylinders 16 are symmetrically distributed on both sides of the sliding seat 13, and one end of the switching cylinder 16 is connected to the pump suction unit bracket 7, and the other end is connected to the sliding seat 13, and the cylinder bodies of the two switching cylinders 16 are connected to the hydraulic branch mechanism 34 through the oil circuit 33, and then the sliding seat 13 can be smoothly driven to reciprocate through the two switching cylinders 16 to ensure that the sliding seat 13 slides into place, so that the corresponding through holes are connected.

[0034] In a specific embodiment, the exhaust valve 10 adopts a butterfly valve, and the exhaust valve 10 is equipped with a second hydraulic motor 17 for driving the exhaust valve 10 to open and close. The second hydraulic motor 17 is connected to the hydraulic branch mechanism 34 through the oil circuit 33. When the suction cylinder is lowered, the second hydraulic motor 17 drives the exhaust valve 10 to flip open to ensure that there is no air in the suction cylinder. When the suction cylinder is sunk by its own weight, the second hydraulic motor 17 drives the exhaust valve 10 to flip and close, sealing the water outlet of the suction cylinder, so that the suction cylinder is in a closed state.

[0035] In a specific embodiment, the pumping unit bracket 7 is also provided with a spiral elevator, and the output end of the spiral elevator is connected to a locking cylinder 32 that rotates synchronously with it, and the output end of the locking cylinder 32 is connected to a locking pin for locking on the suction cylinder. Specifically, ear plates are provided on the suction cylinder and the pumping unit bracket 7, and the locking pin is inserted into the two ear plates to complete the locking of the locking cylinder 32 and the suction cylinder. The locking cylinder 32 is connected to the hydraulic branch mechanism 34 through the oil circuit 33, and the hydraulic drive mechanism supplies oil to the locking cylinder 32 through the hydraulic branch mechanism 34 and the oil circuit 33, so that the locking pin can lock the pumping unit bracket 7 on the suction cylinder. In an emergency, the hand wheel of the spiral elevator is turned to drive the locking cylinder 32 to drive the locking pin to move, so as to unlock the connection between the pumping unit bracket 7 and the suction cylinder. Furthermore, a split pump skid is provided, comprising a pumping unit 24 and a power unit 23 detachably connected to the pumping unit 24, the power unit 23 and the pumping unit 24 both adopt an independent skid-mounted structure, the power unit 23 comprises a power unit bracket 4, preferably the power unit bracket 4 is located above the pumping unit bracket 7, and the power unit bracket 4 and the pumping unit bracket 7 are detachably connected together by bolts, so that the entire split pump skid is set as a double-layer structure, which can make the structure more compact, so that it can occupy a smaller area in a plane and is easier to arrange on a suction cylinder. An underwater valve box 1, a hydraulic pump 2 connected to the underwater valve box 1, and an underwater motor 3 that drives the hydraulic pump 2 to operate are installed on the power unit bracket 4, and a detachable hydraulic pipeline 31 is connected between the underwater valve box 1 and the exhaust valve 10, the switching valve and the first hydraulic motor 19, and the underwater valve box 1 is equipped with an underwater control mechanism 30 electrically connected thereto, and the underwater control mechanism 30 and the underwater motor 3 are both connected to an umbilical cable 26 that transmits power to them. In general, if the entire pump skid is powered only by the umbilical cable 26, then a set of deep-water umbilical cable 26 plus winch 25 is relatively expensive and has poor economic efficiency; if only the hydraulic drive mechanism is used to supply oil, the economic efficiency is obviously also poor. Therefore, the entire device is used to solve the problem of water depth adaptation of the pump skid, so that it can be used in both shallow water (within 150m) and deep water (above 1500m). When used in shallow water, the pumping unit 24 and the power unit 23 are used simultaneously, and the power is transmitted by the umbilical cable 26; when used in deep water, the power unit 23 is removed, and only the pumping unit 24 is retained, and the power is supplied by the pump station of the hydraulic drive mechanism.

[0036] In a specific embodiment, the pumping unit 24 is equipped with an underwater robot 37, that is, the hydraulic drive mechanism selects the underwater robot 37, the underwater robot 37 is used to control the switch knob 35 matched with each oil circuit 33, and the pump station of the underwater robot 37 is used to provide hydraulic power, and a blind hydraulic flying head (ROV Hot stab) is connected between the underwater robot 37 and the hydraulic branching mechanism 34. The blind hydraulic flying head includes a detachable male head 36 and a female head 9, the male head 36 is installed on the underwater robot 37, and the female head 9 is installed on the hydraulic branching mechanism 34. The underwater robot 37 and the pumping unit 24 are detachably connected through the blind hydraulic flying head, so that the underwater robot 37 can be separated from the pumping unit 24 in shallow water, and the underwater robot 37 can be connected to the pumping unit 24 in deep water to supply hydraulic oil power to the pumping unit 24. Preferably, the male head 36 is composed of a metal round head, a cylinder, a sealing ring, a hydraulic input port, etc., and the oil supply valve and the hydraulic input port on the underwater robot 37 pump station are connected by a hydraulic hose; the main functions of the female head 9 are, after being connected to the male head 36, to play a sealing and protective role, and to introduce the hydraulic oil circuit 33 into the hydraulic branch mechanism 34.

[0037] In a specific embodiment, the umbilical cable 26 is electrically connected to a junction box 27 installed on the power unit bracket 4, and a power cable 28 and a control cable 29 are respectively connected between the junction box 27 and the underwater motor 3 and the underwater control mechanism 30. After the umbilical cable 26 passes through the junction box 27, the strong electricity is connected to the underwater motor 3 through the power cable 28, and the control electricity is connected to the underwater control mechanism 30 through the control cable 29. The underwater motor 3 drives the hydraulic pump 2 to provide a power source for the underwater valve box 1, and then the various components on the pump suction unit 24 are connected through the various hydraulic pipelines 31 led out from the underwater valve box 1.

[0038] In a specific embodiment, a monitoring mechanism is also installed on the pumping unit 24, wherein the monitoring mechanism has its own rechargeable battery to power its operation, and the monitoring mechanism is integrated with a pressure sensor 6, an inclination sensor 8 and a display screen 5 to monitor parameters such as pressure and inclination in deep water through the pressure sensor 6 and the inclination sensor 8, and view them through the display screen 5.

[0039] The specific operation of the entire split pump skid is as follows: In shallow waters, the power unit 23 and the pump unit 24 are used simultaneously. At this time, the power unit 23 needs to be powered by the umbilical cable 26. After the umbilical cable 26 passes through the junction box 27, the control power is connected to the underwater control mechanism 30, and the power power is connected to the underwater motor 3. The underwater motor 3 drives the hydraulic pump 2 to provide a power source for the underwater valve box 1. The underwater valve box 1 is connected to the exhaust valve 10, the first hydraulic motor 19, the locking cylinder 32, and the switching cylinder 16 in the pump unit 24 through the oil circuit 33. In the pumping unit 24, the first hydraulic motor 19 drives the water pump 20 to perform water pumping and water injection actions; the exhaust valve 10 is connected to the water outlet of the suction cylinder, and is used to close the suction cylinder during the sinking operation; the locking cylinder 32 is used to lock the pumping unit bracket 7 and the suction cylinder. After the sinking operation is completed, the entire split pump skid can be lifted from the suction cylinder after unlocking; the switching cylinder 16 is used to switch the water path of the pumping unit 24, and can switch between water injection and water pumping.

[0040] In the deep sea, the power unit 23 is removed, and only the pump unit 24 is retained. At this time, an underwater robot 37 is needed, and after the hydraulic branch mechanism 34 on the pump unit 24 is docked with a blind hydraulic flying head, a hydraulic source is provided to the pump unit 24. The hydraulic branch mechanism 34 divides four oil circuits 33, which are respectively connected to the exhaust valve 10, the first hydraulic motor 19, the locking cylinder 32, and the switching cylinder 16. The operator of the underwater robot 37 can control the four switch knobs 35 on the hydraulic branch mechanism 34 to operate these four actions. At this time, the pressure difference between the inside and outside of the suction cylinder, the inclination angle and other parameters can be observed through the monitoring mechanism.

[0041] Adaptive changes made according to actual needs are all within the protection scope of the present invention.

[0042] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.

[0043] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A pump unit, characterized in that: It includes a pump suction unit bracket detachably mounted on the suction cylinder; The pump unit bracket is equipped with a switching valve, a water pump, a first hydraulic motor driving the water pump, a hydraulic branch mechanism connected to the hydraulic drive mechanism, and an exhaust valve installed at the water outlet of the suction cylinder; an oil circuit is connected between the hydraulic branch mechanism and the exhaust valve, the switching valve and the first hydraulic motor; A first through hole and a second through hole are provided on one side of the switching valve, and a third through hole, a fourth through hole and a fifth through hole are provided on the other side. The third through hole and the fourth through hole are sealed and connected with the first through hole and the second through hole respectively when the suction cylinder is pumping water, and the fourth through hole and the fifth through hole are sealed and connected with the first through hole and the second through hole respectively when the suction cylinder is exhausted; the second through hole and the first through hole are respectively connected with a water inlet pipe and a first water outlet pipe, and the water inlet pipe and the first water outlet pipe are respectively connected to the inlet and outlet of the water pump; the third through hole is connected with the second water outlet pipe, a connecting pipe is connected between the fourth through hole and the exhaust valve, and the fifth through hole is connected with a filter pipe.

2. The pumping unit according to claim 1, characterized in that The switching valve is a sliding plate valve structure, comprising a fixed plate and a sliding seat slidably mounted on the fixed plate, the sliding seat being connected to a driving mechanism for driving the sliding, and the driving mechanism being connected to the hydraulic branch mechanism through an oil circuit; The first through hole and the second through hole are arranged on the fixed plate at intervals along the sliding direction of the sliding seat, and the third through hole, the fourth through hole and the fifth through hole are arranged on the sliding seat in sequence at intervals along the sliding direction of the sliding seat; the third through hole and the fourth through hole are respectively connected with the first through hole and the second through hole when the sliding seat moves downward, and the fourth through hole and the fifth through hole are respectively connected with the first through hole and the second through hole when the sliding seat moves upward.

3. The pumping unit according to claim 2, characterized in that: The communicating pipe comprises two fixed sections respectively connected with the fourth through hole and the exhaust valve, and a telescopic joint which is telescopic and expands with the movement of the sliding seat is connected between the two fixed sections.

4. The pumping unit according to claim 2 or 3, characterized in that: The pushing mechanism includes switching cylinders arranged in pairs, which are symmetrically distributed on both sides of the sliding seat, and one end of the switching cylinder is connected to the pump suction unit bracket, and the other end is connected to the sliding seat. The cylinder bodies of the two switching cylinders are connected to the hydraulic branch mechanism through an oil circuit.

5. The pumping unit according to claim 4, characterized in that The exhaust valve adopts a butterfly valve, and the exhaust valve is equipped with a second hydraulic motor to drive the exhaust valve to open and close. The second hydraulic motor is connected to the hydraulic branch mechanism through an oil circuit.

6. The pumping unit according to claim 5, characterized in that The pump suction unit bracket is also provided with a spiral elevator, the output end of the spiral elevator is connected to a locking cylinder that rotates synchronously with it, the output end of the locking cylinder is connected to a locking pin for locking on the suction cylinder, and the locking cylinder is connected to the hydraulic branch mechanism through an oil circuit.

7. A split pump skid using the pumping unit according to any one of claims 1 to 6, characterized in that: It includes the pumping unit and a power unit detachably connected to the pumping unit, the power unit includes a power unit bracket, an underwater valve box, a hydraulic pump connected to the underwater valve box, and an underwater motor that drives the hydraulic pump are installed on the power unit bracket, detachable hydraulic pipelines are connected between the underwater valve box and the exhaust valve, the switching valve and the first hydraulic motor, the underwater valve box is equipped with an underwater control mechanism electrically connected to it, and the underwater control mechanism and the underwater motor are both connected to an umbilical cable that transmits electricity to them.

8. The split pump skid according to claim 7, characterized in that: The pumping unit is equipped with an underwater robot, and a blind hydraulic flying head is connected between the underwater robot and the hydraulic branching mechanism. The blind hydraulic flying head includes a detachable male head and a female head. The male head is installed on the underwater robot, and the female head is installed on the hydraulic branching mechanism.

9. The split pump skid according to claim 8, characterized in that: The umbilical cable is electrically connected to a junction box installed on the power unit bracket, and a power cable and a control cable are respectively connected between the junction box and the underwater motor and the underwater control mechanism.

10. The split pump skid according to claim 9, characterized in that: A monitoring mechanism is also installed on the pumping unit, and a pressure sensor, an inclination sensor and a display screen are integrated on the monitoring mechanism.

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