High-temperature and high-pressure shielding type main circulating pump

Abstract

The utility model discloses a high-temperature and high-pressure shielding type main circulating pump, which relates to the technical field of main circulating pumps and solves the problem that the main circulating pump is limited in application in different occasions and environments, the pump is a vertical shielding pump, a pump shell is of a torispherical structure, and a suction inlet and a discharge outlet are both arranged on the pump shell and are connected with a main pipeline system in a welding way; the matched motor is a shielding motor; an impeller of the pump is provided with an impeller front impeller ring and an impeller rear impeller ring; piston rings are arranged between the guide vane and the pump shell and between the heat shield and the pump shell, and a wound gasket is arranged between the pump shell and the motor for sealing. Under the driving of the motor of the driving device, the reactor coolant can circulate at a specified flow, spraying can be carried out under an accident working condition in a power station system, functions under different working condition requirements are realized, the pump is the same as a nuclear main pump, and the medium is the reactor coolant. The pump is a constituent part of a reactor coolant system pressure boundary, and can ensure the structural integrity of the reactor coolant pressure boundary.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of main circulating pump especially relates to a high temperature and high pressure shielded main circulating pump. BACKGROUND

[0002] Small nuclear power plant applications are also more and more, inland nuclear power, offshore platform floating reactor, nuclear energy heating, nuclear power treasure, different application occasions of nuclear power plant pump products are more and more, the challenge of our past nuclear power plant pump product types is also more and more big. Before, different pump products are applied in different reactor type power plants, such as 1000MW large reactor axial shaft seal pump, mixed flow shaft seal pump, etc., but now the application of small shield pump is also required more and more, but the current domestic high temperature and high pressure shield pump technology is very limited. Therefore, the development of small shield pump technology applied in nuclear power plant is imminent. UTILITY MODEL CONTENTS

[0003] In view of the problem that the above-mentioned main circulating pump is limited in application in different occasions and environments, the utility model aims at providing a high temperature and high pressure shielded main circulating pump, which can be applied in various different application occasions.

[0004] In order to achieve the above-mentioned purpose, the utility model takes the technical scheme that:

[0005] A high temperature and high pressure shielded main circulating pump, comprising:

[0006] A support 1, a pump shell 3 and a motor 14, the pump shell 3 is installed at the top of the support 1, the motor 14 is installed at the top of the pump shell 3, the bottom of the pump shell 3 is provided with a suction inlet, and the side wall of the pump shell 3 is provided with a discharge outlet;

[0007] A flow guide pipe 4 and a guide vane 5, both of which are located in the pump shell 3, the lower end of the flow guide pipe 4 is communicated with the upper end of the suction inlet, and the upper end of the flow guide pipe 4 is communicated with the guide vane 5;

[0008] An impeller 13, which is arranged in the pump shell 3, the motor 14 comprises a motor shaft 10, the motor shaft 10 is provided with a key 11, the impeller 13 is connected with the motor shaft 10 through the key 11, and the impeller 13 is arranged above the guide vane 5;

[0009] A heat shield 9, which is installed on the motor 14, the motor shaft 10 penetrates into the heat shield 9, and the heat shield 9 is arranged above the impeller 13;

[0010] A locking device 15, which is installed at the end of the motor shaft 10, and is used for locking the impeller 13.

[0011] The high-temperature and high-pressure shielding type main circulating pump has a suction inlet in the vertical direction formed in the bottom of the pump shell 3, and a discharge outlet in the horizontal direction formed in the side wall of the pump shell 3.

[0012] The high-temperature and high-pressure shielding type main circulating pump further comprises an inlet elbow assembly 2 arranged in the bracket 1, and the upper end of the inlet elbow assembly 2 is communicated with the lower end of the suction inlet of the pump shell 3.

[0013] The high-temperature and high-pressure shielding type main circulating pump further comprises a front impeller port ring 16 arranged on the side of the impeller 13 facing the guide vane 5.

[0014] The high-temperature and high-pressure shielding type main circulating pump further comprises a rear impeller port ring 12 arranged between the impeller 13 and the heat shield 9, and the rear impeller port ring 12 is connected with the heat shield 9.

[0015] The high-temperature and high-pressure shielding type main circulating pump further comprises an outer winding gasket 7 and an inner winding gasket 8, and the top of the motor 14 and the pump shell 3 are sealed by the outer winding gasket 7 and the inner winding gasket 8.

[0016] The high-temperature and high-pressure shielding type main circulating pump further comprises two piston rings 6 arranged between the heat shield 9 and the pump shell 3, and one piston ring 6 arranged between the guide vane 5 and the pump shell 3.

[0017] The high-temperature and high-pressure shielding type main circulating pump further comprises that the inlet elbow assembly 2 and the pump shell 3 are welded.

[0018] The high-temperature and high-pressure shielding type main circulating pump further comprises that the motor 14 is a shielding motor.

[0019] The high-temperature and high-pressure shielding type main circulating pump further comprises that the locking device 15 comprises a locking cap 15-1, a clamping ring 15-2, a set screw 15-3, a lock washer 15-4 and an AWN lock plate 15-5, the end of the motor shaft 10 is provided with an assembly groove, the locking cap 15-1 is arranged at the end of the motor shaft 10, the clamping ring 15-2 is arranged in the assembly groove and located at the joint of the locking cap 15-1 and the motor shaft 10, the locking cap 15-1 is provided with an assembly through hole, the lock washer 15-4 is sleeved on the set screw 15-3, the set screw 15-3 penetrates into the assembly through hole and is assembled at the end of the motor shaft 10, the locking cap 15-1 and the set screw 15-3 are sealed by the lock washer 15-4, and the AWN lock plate 15-5 is arranged in the assembly through hole and used for locking the set screw 15-3 in the locking cap 15-1.

[0020] The high-temperature and high-pressure shielding type main circulating pump has the positive effects that

[0021] (1) The utility model discloses a pump shell is spherical shell type, and the suction inlet and the discharge outlet of the pump are on the pump shell, the impeller rotation speed requirement is high, and the impeller can be directly connected with the motor, and medium is accelerated in a small container in a large range.

[0022] (2) The utility model discloses a motor is shielded motor, and the shielded motor is used for conveying virulently toxic, corrosive, radioactive, flammable and explosive, valuable liquid and the liquid that will cause major harm after leaking, and the shielded motor and the pump are matched to form the shielded pump suitable for conveying the liquid without solid particles.

[0023] (3) The utility model discloses a pump impeller is equipped with impeller front mouth ring and impeller rear mouth ring, and is equipped with piston ring between the guide vane and the pump shell, and is also equipped with two piston rings between the heat shield and the pump shell, and the piston ring plays the role of supporting and also plays the role of full liquid sealing, to prevent the high-pressure medium of impeller outlet from flowing to the motor side.

[0024] (4) The utility model discloses a combined impeller locking device, and the locking device is easy to disassemble, does not have the phenomenon of being locked, has good locking reliability, and can reduce the impact of high-temperature medium on the impeller. The impeller is sleeved on the motor shaft, the snap ring is buckled in the groove of the motor shaft, the lock cap is used to fix the snap ring, the lock cap is fixed on the motor shaft by the lock washer and the lock washer anti-loose washer, and the lock screw is fixed in the lock cap by the AWN lock sheet. The locking mechanism can select different structures of the lock cap according to different application occasions, and the lock cap can be designed into different streamline shapes according to the flow channel form inside the pump body, so that vortex is avoided at the suction inlet of the impeller. The locking mechanism can be applied to the locking of ordinary rotating parts. If it is an ordinary shaft end structure, the lock cap can be designed into an easy-to-process shape. A double-half snap ring structure is applied in the locking mechanism, which is directly buckled in the groove of the shaft, and is convenient to install. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structure schematic view of a high-temperature high-pressure shielded main circulating pump of the utility model.

[0026] Figure 2 It is a partial enlarged view of a high-temperature high-pressure shielded main circulating pump of the utility model.

[0027] Figure 3 It is a structure schematic view of a guide vane of a high-temperature high-pressure shielded main circulating pump of the utility model.

[0028] Figure 4 It is a structure schematic view of an impeller of a high-temperature high-pressure shielded main circulating pump of the utility model.

[0029] Figure 5 Fig. 1 is a structure schematic view of a piston ring of a high-temperature and high-pressure shielding type main circulating pump.

[0030] Figure 6 Fig. 2 is a structure schematic view of a front port ring of an impeller of the high-temperature and high-pressure shielding type main circulating pump.

[0031] Figure 7 Fig. 3 is a structure schematic view of a rear port ring of the impeller of the high-temperature and high-pressure shielding type main circulating pump.

[0032] In the drawings: 1, support; 2, inlet elbow assembly; 3, pump shell; 4, flow guide pipe; 5, guide vane; 6, piston ring; 7, outer winding pad; 8, inner winding pad; 9, heat shield; 10, motor shaft; 11, key; 12, rear port ring of impeller; 13, impeller; 14, motor; 15, locking device; 16, front port ring of impeller; 15-1, lock cap; 15-2, snap ring; 15-3, set screw; 15-4, locktight lock washer; 15-5, AWN lock plate. DETAILED DESCRIPTION

[0033] The utility model will be further described below in combination with the drawings and specific embodiments, but not as the limitation of the utility model.

[0034] Please refer to Figures 1 to 7 It shows a high-temperature and high-pressure shielding type main circulating pump, wherein, including:

[0035] Support 1, pump shell 3 and motor 14, pump shell 3 is installed at the top of support 1, motor 14 is installed at the top of pump shell 3, the bottom of pump shell 3 is provided with suction inlet, the side wall of pump shell 3 is provided with discharge outlet;

[0036] Flow guide pipe 4 and guide vane 5, flow guide pipe 4 and guide vane 5 are located in pump shell 3, the lower end of flow guide pipe 4 is communicated with the upper end of suction inlet, the upper end of flow guide pipe 4 is communicated with guide vane 5;

[0037] Impeller 13, impeller 13 is located in pump shell 3, motor 14 includes: motor shaft 10, key 11 is arranged on motor shaft 10, impeller 13 is connected with motor shaft 10 through key 11, impeller 13 is located above guide vane 5;

[0038] Heat shield 9, heat shield 9 is installed on motor 14, motor shaft 10 penetrates into heat shield 9, heat shield 9 is located above impeller 13;

[0039] Locking device 15, locking device 15 is installed at the end of motor shaft 10, locking device 15 is used for locking impeller 13.

[0040] Further, in a preferred embodiment, the bottom of the pump shell 3 is provided with a suction inlet in the vertical direction, and the sidewall of the pump shell 3 is provided with a discharge outlet in the horizontal direction.

[0041] Further, in a preferred embodiment, the inlet elbow assembly 2 is further provided, and the upper end of the inlet elbow assembly 2 is communicated with the lower end of the suction inlet of the pump shell 3.

[0042] Further, in a preferred embodiment, the impeller front mouth ring 16 is further provided, and the impeller front mouth ring 16 is installed on the side of the impeller 13 facing the guide vane 5.

[0043] Further, in a preferred embodiment, the impeller rear mouth ring 12 is further provided, and the impeller rear mouth ring 12 is arranged between the impeller 13 and the heat shield 9, and the impeller rear mouth ring 12 is connected with the heat shield 9.

[0044] Further, in a preferred embodiment, the outer winding gasket 7 and the inner winding gasket 8 are further provided, and the top of the motor 14 and the pump shell 3 are sealed by the outer winding gasket 7 and the inner winding gasket 8.

[0045] Further, in a preferred embodiment, the piston ring 6 is further provided, and two piston rings 6 are installed between the heat shield 9 and the pump shell 3, and one piston ring 6 is installed between the guide vane 5 and the pump shell 3.

[0046] Further, in a preferred embodiment, the inlet elbow assembly 2 and the pump shell 3 are welded.

[0047] Further, in a preferred embodiment, the motor 14 is a shielded motor.

[0048] Further, in a preferred embodiment, the locking device 15 comprises a lock cap 15-1, a snap ring 15-2, a set screw 15-3, a locktite lock washer 15-4 and an AWN lock plate 15-5, the end of the motor shaft 10 is provided with an assembly groove, the lock cap 15-1 is arranged at the end of the motor shaft 10, the snap ring 15-2 is arranged in the assembly groove and located at the joint between the lock cap 15-1 and the motor shaft 10, the lock cap 15-1 is provided with an assembly through hole, the locktite lock washer 15-4 is sleeved on the set screw 15-3, the set screw 15-3 penetrates into the assembly through hole and is assembled at the end of the motor shaft 10, the lock cap 15-1 and the set screw 15-3 are sealed by the locktite lock washer 15-4, and the AWN lock plate 15-5 is installed in the assembly through hole, and the AWN lock plate 15-5 is used for locking the set screw 15-3 in the lock cap 15-1.

[0049] The above is only a preferred embodiment of the utility model, and does not limit the implementation mode and protection scope of the utility model.

[0050] The utility model further has the following implementation mode based on the above.

[0051] The utility model discloses a further embodiment, the utility model discloses a structure is simple, stable, reliable, safe high temperature high pressure shielding type main circulating pump structure. The utility model discloses a technical scheme is: pump shell 3 and support 1 are connected, inlet elbow pipe subassembly 2 and pump shell 3 are connected, and the lower portion of flow guide pipe 4 is connected with pump shell 3, and the upper portion of flow guide pipe 4 is communicated with guide vane 5, and heat shield 9 is installed on motor 14, motor shaft 10 passes through heat shield 9, impeller rear mouth ring 12 is connected with heat shield 9, impeller front mouth ring 16 is connected with impeller 13, impeller 13 is sleeved on motor shaft 10 through key 11 and is fixed by locking device 15, piston ring 6 is sleeved in the groove of heat shield 9 and guide vane 5, and outer winding pad 7 and inner winding pad 8 are arranged between pump shell 3 and motor 14.

[0052] The utility model discloses a further embodiment, the shielding pump is vertical pump, and the pump suction inlet is located one lateral elbow pipe that the axle center is vertically downward connects, and the pump discharge port is horizontal through the axle center, and the import and export of the pump shell 3 are all welding bevel joint structure.

[0053] The utility model discloses a further embodiment, there is a piston ring 6 between the pump shell 3 and guide vane 5, and there are two piston rings 6 between the pump shell 3 and heat shield 9.

[0054] The utility model discloses a further embodiment, impeller 13 is sleeved on motor shaft 10, and snap ring 15-2 is buckled in the groove of motor shaft 10, and locking cap 15-1 is used to fix snap ring 15-2, and lock screw 15-3 and lock tight lock washer 15-4 are used to fix locking cap 15-1 on motor shaft 10, and AWN lock sheet 15-5 is used to fix lock screw 15-3 in locking cap 15-1.

[0055] The utility model discloses a further embodiment, the working process of the utility model is as follows: Figure 1 As shown by the arrow, impeller 13 rotates under the rotation of shielding motor 14, and medium is sucked from the vertical downward suction inlet, flows through flow guide ring 4, guide vane 5 inlet, and is rectified by guide vane 5 after energy increase, and is discharged from the horizontal discharge outlet of pump body 3 after the outlet of guide vane 5.

[0056] The utility model discloses a further embodiment, the high temperature high pressure shielding type main circulating pump of the utility model, as shown in Figure 1 The utility model discloses a further embodiment, the high temperature high pressure shielding type main circulating pump of the utility model, as shown in

[0057] The utility model discloses a further embodiment, the high temperature high pressure shielding type main circulating pump of the utility model, as shown in Figure 1 The utility model discloses a further embodiment, the high temperature high pressure shielding type main circulating pump of the utility model, as shown in

[0058] In further embodiments of the utility model, the high-temperature and high-pressure shielding type main circulating pump of the utility model, as shown in Figure 1 , is characterized in that the system pressure boundary component is connected with the main pipeline system in a welding mode.

[0059] In further embodiments of the utility model, the high-temperature and high-pressure shielding type main circulating pump of the utility model, as shown in Figure 1 , is characterized in that the impeller 5 of the pump is provided with an impeller front ring 16 and an impeller rear ring 12, and a piston ring 6 is arranged between the guide vane 5 and the pump shell 3, and two piston rings 6 are also arranged between the heat shield 9 and the pump shell 3, the piston ring 6 plays a supporting role and also plays a role of fully sealing the liquid, preventing the high-pressure medium at the outlet of the impeller 13 from flowing to the motor 14 side.

[0060] In further embodiments of the utility model, the high-temperature and high-pressure shielding type main circulating pump of the utility model, as shown in Figure 1 and Figure 2 , is characterized in that a combined impeller locking mechanism is used, the locking mechanism is easy to disassemble and cannot be locked, the locking reliability is good, and the impact of the high-temperature medium on the impeller can be reduced. The installation is convenient, and special tools do not need to be designed and manufactured separately, the impeller 13 is sleeved on the motor shaft 10, the clamping ring 15-2 is buckled in the groove of the motor shaft 10, the lock cap 15-1 is used to fix the clamping ring 15-2, the lock cap 15-1 is fixed on the motor shaft 10 by the lock screw 15-3 and the Lo Ti secure locking washer 15-4, and the lock screw 15-3 is fixed in the lock cap 15-1 by the AWN lock piece 15-5. The locking mechanism can select different structures of the lock cap according to different application occasions, and the lock cap can be designed into different streamline shapes according to the flow channel form inside different pump bodies, as shown in Figure 1 , Figure 2 , so that liquid flow impact and vortex formation at the suction inlet of the impeller are avoided. The locking mechanism can be applied to ordinary rotating part structures. If it is an ordinary shaft end structure, the lock cap can be designed into a shape easy to process. A double-half clamping ring structure is applied in the locking mechanism, and the clamping ring can be directly buckled into the groove of the shaft, so that the installation is convenient.

[0061] In further embodiments of the utility model, the specific implementation mode is as shown in Figure 1 . The high-temperature and high-pressure shielding type main circulating pump is characterized in that the impeller front ring 16 is first installed on the impeller 13, and the impeller rear ring 12 is installed on the heat shield 9, then one of the piston rings is sleeved in the groove of the guide vane 5, the two piston rings 6 are sleeved in the groove of the heat shield 9, the flow guide pipe 4 is installed on the pump shell 3, the guide vane 5 is installed on the flow guide pipe 4, the inlet pipe 2 is welded to the pump shell 3, and the pump shell 3 is connected with the support 1.

[0062] In further embodiments of the utility model, the heat shield 9 is then sleeved on the motor shaft 10, and then the impeller 13 is sleeved on the motor shaft 10 by the key 11 and is fixed by the impeller locking mechanism. Then the outer winding gasket 7 and the inner winding gasket 8 are pressed in the two corresponding grooves of the pump shell 3, and the motor 14 and the pump shell 3 are connected together.

[0063] In further embodiments of the utility model, the utility model relates to a high-temperature high-pressure shielding type main circulating pump, the pump is a vertical shielding pump, the pump shell 3 is a quasi-spherical pump shell structure, the pump shell 3 is the component part of system pressure boundary, and the suction inlet and the discharge outlet are all on the pump shell 3 and are connected with the main pipeline system in a welding mode; the matched motor 14 is a shielding motor; the impeller 5 of the pump is provided with an impeller front port ring 16 and an impeller rear port ring 12; and a piston ring 6 is arranged between the guide vane 5 and the pump shell 3, two piston rings 6 are also arranged between the heat shield 9 and the pump shell 3, and two winding gaskets are arranged between the pump shell 3 and the motor 14 for sealing. The utility model can realize the circulation of the reactor coolant at a specified flow under the driving of the driving device motor, can spray under the accident working condition in the power station system, realizes the function under different working condition requirements, and the pump is the same as the nuclear main pump, and the medium is the reactor coolant. The pump is the component part of the reactor coolant system pressure boundary and can guarantee the structural integrity of the reactor coolant pressure boundary.

[0064] In further embodiments of the utility model, the pump shell 3 is installed on the support 1 through assembly screws, the bottom of the pump shell 3 is provided with a suction inlet along the vertical direction, the side wall of the pump shell 3 is provided with a discharge outlet along the horizontal direction, the impeller 13 and the guide vane 5 are all installed in the pump shell 3, the guide vane 5 and the upper portion of the suction inlet are communicated through the flow guide pipe 4, the impeller 13 is located above the guide vane 5, the impeller 13 is installed on the motor shaft 10, the motor 14 drives the impeller 13 to rotate, the medium is sucked into the pump shell 3 from the suction inlet, is rectified through the guide vane 5 and is sprayed from the discharge outlet of the pump shell 3 through the impeller 13, and the inlet pipe 2 is bently arranged, the upper end of the inlet pipe 2 is communicated with the lower portion of the suction inlet, and the lower end of the inlet pipe 2 is communicated with the main pipeline system.

[0065] In the further embodiment of the utility model, the impeller 13 is locked on the motor shaft 10 through the locking device 15, the locking device 15 includes: the lock cap 15-1, the snap ring 15-2, the set screw 15-3, the locktite anti-loose washer 15-4 and the AWN lock plate 15-5, the end of the motor shaft 10 is equipped with the assembly slot, the lock cap 15-1 is placed at the end of the motor shaft 10, the snap ring 15-2 is placed in the assembly slot and is located at the joint of the lock cap 15-1 and the motor shaft 10, the lock cap 15-1 is equipped with the assembly through hole, the locktite anti-loose washer 15-4 is sleeved on the set screw 15-3, the set screw 15-3 is penetrated into the assembly through hole and is assembled at the end of the motor shaft 10, the lock cap 15-1 and the set screw 15-3 are sealed through the locktite anti-loose washer 15-4, the AWN lock plate 15-5 is installed in the assembly through hole, and the AWN lock plate 15-5 is used to lock the set screw 15-3 in the lock cap 15-1.

[0066] In the further embodiment of the utility model, the impeller 13 is locked on the motor shaft 10 through the locking device 15, the locking device 15 includes: the lock cap 15-1, the snap ring 15-2, the set screw 15-3, the locktite anti-loose washer 15-4 and the AWN lock plate 15-5, the end of the motor shaft 10 is equipped with the assembly slot, the lock cap 15-1 is placed at the end of the motor shaft 10, the snap ring 15-2 is placed in the assembly slot and is located at the joint of the lock cap 15-1 and the motor shaft 10, the lock cap 15-1 is equipped with the assembly through hole, the locktite anti-loose washer 15-4 is sleeved on the set screw 15-3, the set screw 15-3 is penetrated into the assembly through hole and is assembled at the end of the motor shaft 10, the lock cap 15-1 and the set screw 15-3 are sealed through the locktite anti-loose washer 15-4, the AWN lock plate 15-5 is installed in the assembly through hole, and the AWN lock plate 15-5 is used to lock the set screw 15-3 in the lock cap 15-1.

[0067] In the further embodiment of the utility model, the impeller 13 is locked on the motor shaft 10 through the locking device 15, the locking device 15 includes: the lock cap 15-1, the snap ring 15-2, the set screw 15-3, the locktite anti-loose washer 15-4 and the AWN lock plate 15-5, the end of the motor shaft 10 is equipped with the assembly slot, the lock cap 15-1 is placed at the end of the motor shaft 10, the snap ring 15-2 is placed in the assembly slot and is located at the joint of the lock cap 15-1 and the motor shaft 10, the lock cap 15-1 is equipped with the assembly through hole, the locktite anti-loose washer 15-4 is sleeved on the set screw 15-3, the set screw 15-3 is penetrated into the assembly through hole and is assembled at the end of the motor shaft 10, the lock cap 15-1 and the set screw 15-3 are sealed through the locktite anti-loose washer 15-4, the AWN lock plate 15-5 is installed in the assembly through hole, and the AWN lock plate 15-5 is used to lock the set screw 15-3 in the lock cap 15-1.

[0068] In the further embodiment of the utility model, the motor 14 and the pump shell 3 are heat insulated through the heat shield 9, so that the stable operation of the motor 14 is avoided from being influenced by the high-temperature medium.

[0069] In the further embodiment of the utility model, the motor 14 and the pump shell 3 are sealed and connected through the outer winding gasket 7 and the inner winding gasket 8, and the outer winding gasket 7 and the inner winding gasket 8 play the role of sealing, steam blocking and water proofing.

[0070] In the further embodiment of the utility model, the pump shell 3 is spherical, the suction inlet and the discharge outlet of the pump are all on the pump shell 3, the rotating speed of the impeller 13 is required to be high, the impeller 13 can be directly connected with the motor 14, and the medium is accelerated in a larger range in a smaller container.

[0071] In the further embodiment of the utility model, the motor 14 is a shielded motor, the shielded motor is used for conveying liquid with high toxicity, corrosion, radioactivity, flammability, value and great harm after leakage, the shielded motor and the pump are matched to form a shielded pump, and the shielded pump is suitable for conveying liquid without solid particles.

[0072] In the further embodiment of the utility model, as shown in Figure 1As shown, the impeller 5 of the pump is provided with an impeller front ring 16 and an impeller rear ring 12, and a piston ring 6 is arranged between the guide vane 5 and the pump shell 3, and two piston rings 6 are arranged between the heat shield 9 and the pump shell 3, the piston ring 6 plays a supporting role and also plays a role of fully sealing the liquid, preventing the high-pressure medium at the outlet of the impeller 13 from flowing to the motor 14 side.

[0073] In further embodiments of the utility model, as shown in Figure 1 and Figure 2 A combined impeller locking device 15 is adopted, the locking device 15 is easy to disassemble, cannot be locked, has good locking reliability, and can reduce the impact of high-temperature medium on the impeller. It is convenient to install, does not need to design and manufacture special tools, the impeller 13 is sleeved on the motor shaft 10, the clamping ring 15-2 is buckled in the groove of the motor shaft 10, the lock cap 15-1 is used to fix the clamping ring 15-2, the lock cap 15-1 is fixed on the motor shaft 10 by the lock screw 15-3 and the lock tight anti-loose washer 15-4, and the AWN lock piece 15-5 is used to fix the lock screw 15-3 in the lock cap 15-1. The locking mechanism can select lock caps with different structures according to different application occasions, and the lock cap can be designed into different streamline shapes according to the flow channel form inside the pump body, as shown in Figure 1 、 Figure 2 To ensure that vortex is not formed by liquid flow impact at the suction inlet of the impeller. It can be applied to the locking of ordinary rotating parts. If it is an ordinary shaft end structure, the lock cap can be designed into a shape easy to process. A double-half clamping ring structure is applied in the locking mechanism, which can be directly buckled into the groove of the shaft, and is convenient to install.

[0074] The above is only the preferred embodiment of the utility model, and does not limit the implementation and protection scope of the utility model. For those skilled in the art, it should be realized that any equivalent replacement and obvious changes made according to the contents of the utility model specification and drawings should be included in the protection scope of the utility model.

Claims

1. A high-temperature high-pressure canned main circulating pump, characterized in that, The utility model relates to a pump, comprising: a bracket (1), a pump shell (3) and a motor (14), the pump shell (3) is installed on the top of the bracket (1), the motor (14) is installed on the top of the pump shell (3), the bottom of the pump shell (3) is provided with a suction inlet, and the sidewall of the pump shell (3) is provided with a discharge outlet; a flow guide pipe (4) and a guide vane (5), the flow guide pipe (4) and the guide vane (5) are located in the pump shell (3), the lower end of the flow guide pipe (4) is communicated with the upper end of the suction inlet, and the upper end of the flow guide pipe (4) is communicated with the guide vane (5); an impeller (13), the impeller (13) is arranged in the pump shell (3), the motor (14) comprises a motor shaft (10), the motor shaft (10) is provided with a key (11), the impeller (13) is connected with the motor shaft (10) through the key (11), and the impeller (13) is arranged above the guide vane (5); a heat shield (9), the heat shield (9) is installed on the motor (14), the motor shaft (10) penetrates into the heat shield (9), and the heat shield (9) is arranged above the impeller (13); a locking device (15), the locking device (15) is installed on the end of the motor shaft (10), and the locking device (15) is used for locking the impeller (13).

2. The high-temperature high-pressure canned main circulating pump according to claim 1, characterized in that, The bottom of the pump shell (3) is provided with a suction inlet in the vertical direction, and the sidewall of the pump shell (3) is provided with a discharge outlet in the horizontal direction.

3. The high-temperature high-pressure canned pump according to claim 1, wherein Further comprising: an inlet elbow assembly (2), the inlet elbow assembly (2) is arranged in the bracket (1), and the upper end of the inlet elbow assembly (2) is communicated with the lower end of the suction inlet of the pump shell (3).

4. The high-temperature high-pressure canned pump according to claim 1, wherein Further comprising:

5. The high temperature high pressure canned motor pump of claim 1, wherein, an impeller front mouth ring (16), the impeller front mouth ring (16) is installed on the side of the impeller (13) facing the guide vane (5). Further comprising:

6. The high temperature high pressure canned motor pump of claim 1, wherein, an impeller rear mouth ring (12), the impeller rear mouth ring (12) is arranged between the impeller (13) and the heat shield (9), and the impeller rear mouth ring (12) is connected with the heat shield (9). Further comprising:

7. The high temperature high pressure canned motor pump of claim 1, wherein, an outer winding gasket (7) and an inner winding gasket (8), the top of the motor (14) and the pump shell (3) are sealed by the outer winding gasket (7) and the inner winding gasket (8). Further comprising:

8. The high-temperature high-pressure canned pump according to claim 3, wherein a piston ring (6), two piston rings (6) are installed between the heat shield (9) and the pump shell (3), and one piston ring (6) is installed between the guide vane (5) and the pump shell (3).

9. The high temperature high pressure canned motor pump of claim 1, wherein, The inlet elbow assembly (2) and the pump shell (3) are welded. The motor (14) is a shielded motor.

10. The high temperature high pressure canned motor pump of claim 1, wherein, The locking device (15) comprises a lock cap (15-1), a snap ring (15-2), a set screw (15-3), a lock washer (15-4) and an AWN lock plate (15-5). The end of the motor shaft (10) is provided with an assembly groove. The lock cap (15-1) is arranged at the end of the motor shaft (10). The snap ring (15-2) is arranged in the assembly groove and located at the joint of the lock cap (15-1) and the motor shaft (10). The lock cap (15-1) is provided with an assembly through hole. The lock washer (15-4) is sleeved on the set screw (15-3). The set screw (15-3) penetrates into the assembly through hole and is assembled at the end of the motor shaft (10). The lock cap (15-1) and the set screw (15-3) are sealed by the lock washer (15-4). The AWN lock plate (15-5) is installed in the assembly through hole. The AWN lock plate (15-5) is used for locking the set screw (15-3) in the lock cap (15-1).

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