Parallel shield pump and water and heat supply system

Abstract

The utility model relates to a parallel type shield pump and a water and heat supply system, the water and heat supply system comprises the parallel type shield pump, the parallel type shield pump comprises a pump body, a first impeller, a second impeller and a switch valve, the pump body comprises a first containing part and a second containing part, the pump body is provided with a main output port, a confluence cavity, a first output port and a second output port, the first accommodating part is communicated with the first output port, the second accommodating part is communicated with the second output port, the first impeller rotates in the first accommodating part, the second impeller rotates in the second accommodating part, the switching valve is rotatably arranged in the confluence cavity to form three positions, and the switching valve is located at the first position and blocks the first output port; when the switch valve is located at the second position, the switch valve blocks the second output port; the switch valve is located at the third position and does not block the two output ports. The operation mode of the parallel shield pump is changed through rotation of the first impeller and / or the second impeller, so that the large-flow or small-flow requirement of a user is met, and high-efficiency operation is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of shielded pumps, in particular to a parallel shielded pump and a water supply and heating system. Background Art

[0002] Shielded pumps are widely used in hot water circulation, household cold water boosting, refrigeration systems and the transportation of corrosive, flammable, explosive or toxic liquids in chemical plants due to their compact structure, low vibration and noise, safety and no leakage.

[0003] In order to meet the water supply and heating needs under extreme weather conditions, a shielded pump is required to meet both small and large flow requirements without changing the head. In the prior art, a water supply and heating system equipped with a single pump can only meet one flow requirement at the same head. When the water supply and heating system requires a larger flow, only an additional pump with the same flow rate can be added or a pump with a larger flow rate can be replaced. The former requires a larger installation space, and requires changes to the pipeline and control system, etc., and also requires the addition of supporting facilities such as valves. The installation cost is also higher and the use is complicated; the latter can meet the user's peak flow demand. Once the user's flow demand becomes smaller, the efficiency of the pump will decrease, and the pump will run at a small flow point for a long time, and the vibration and noise will also increase, shortening the service life of the pump.

[0004] Therefore, there is an urgent need for a parallel canned motor pump and a water supply and heating system to solve the above technical problems. Utility Model Content

[0005] An object of the utility model is to provide a parallel canned motor pump to at least solve one of the above problems.

[0006] To achieve the above object, the utility model provides a parallel canned motor pump, comprising:

[0007] A pump body, comprising a first accommodating portion and a second accommodating portion which are independent of each other, the pump body having a total output port, a confluence cavity, a first output port and a second output port, the first accommodating portion being connected to the first output port, the second accommodating portion being connected to the second output port, the first output port and the second output port being able to be connected to the confluence cavity respectively, and the total output port being connected to the confluence cavity;

[0008] a first impeller rotatably disposed in the first accommodation portion;

[0009] a second impeller rotatably disposed in the second accommodation portion;

[0010] The switch valve is rotatably arranged in the confluence chamber. The switch valve forms a first position, a second position and a third position by rotating. When the switch valve is in the first position, the switch valve blocks the first output port; when the switch valve is in the second position, the switch valve blocks the second output port; when the switch valve is in the third position, the switch valve does not block the first output port and the second output port.

[0011] Furthermore, the confluence cavity is fan-shaped, and the total output port passes through the arc-shaped inner wall of the confluence cavity.

[0012] Further, the first accommodating portion has a first accommodating cavity, the second accommodating portion has a second accommodating cavity, the first impeller is rotatably disposed in the first accommodating cavity, and the second impeller is rotatably disposed in the second accommodating cavity.

[0013] Furthermore, the pump body further comprises an input portion, wherein the input portion has a main input port, and the main input port is respectively communicated with the first accommodating chamber and the second accommodating chamber.

[0014] Furthermore, the parallel canned motor also includes a first motor and a second motor, the first casing of the first motor is installed on the first accommodating portion, the output end of the first motor is connected to the first impeller, the second casing of the second motor is installed on the second accommodating portion, and the output end of the second motor is connected to the second impeller.

[0015] Furthermore, the parallel canned motor pump further includes a control module, and the control module is capable of controlling the start and stop and operating time of the first motor and the second motor.

[0016] Furthermore, the control module includes a first control component and a second control component, the first control component corresponds to the first motor, the second control component corresponds to the second motor, the first control component and the second control component both include an intermediate relay and a time relay, the intermediate relay can control the start and stop of the first motor or the second motor by powering on and off, and the time relay can time and control the powering on and off of the intermediate relay.

[0017] Furthermore, when the intermediate relay in the first control component is powered off, the first motor stops working; when the intermediate relay in the second control component is powered off, the second motor stops working.

[0018] Furthermore, when the intermediate relay in the first control component is powered off, the time relay in the second control component is powered on and works; when the intermediate relay in the second control component is powered off, the time relay in the first control component is powered on and works.

[0019] Another object of the present invention is to provide a water supply and heating system to at least solve one of the above problems.

[0020] To achieve the above objectives, the utility model provides a water supply and heating system, comprising the parallel canned pump described in any of the above solutions.

[0021] The beneficial effects of the utility model are:

[0022] The water supply and heating system provided by the utility model comprises a parallel canned pump, which is used for the circulation of fluid so as to supply water or heat. The parallel canned pump comprises a pump body, a first impeller, a second impeller and a switch valve, the pump body comprises a first accommodating part and a second accommodating part which are independent of each other, the pump body has a total output port, a confluence cavity, a first output port and a second output port, the first accommodating part is connected to the first output port, the second accommodating part is connected to the second output port, the first output port and the second output port can be respectively connected to the confluence cavity, the total output port is connected to the confluence cavity, the first impeller is rotatably arranged in the first accommodating part, the second impeller is rotatably arranged in the second accommodating part, the switch valve is rotatably arranged in the confluence cavity, the switch valve forms a first position, a second position and a third position by rotating, when the switch valve is in the first position, the switch valve blocks the first output port; when the switch valve is in the second position, the switch valve blocks the second output port; when the switch valve is in the third position, the switch valve does not block the first output port and the second output port.

[0023] By rotating the first impeller and / or the second impeller, the operating mode of the parallel canned motor pump can be changed to meet the user's large flow or small flow requirements, and the first impeller and the second impeller both operate in the rated mode, which can ensure the high-efficiency operation of the parallel canned motor pump and extend its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the first angle of the parallel canned motor pump provided by the embodiment of the utility model;

[0025] Figure 2 It is a structural schematic diagram of the second angle of the parallel canned motor pump provided by the embodiment of the utility model;

[0026] Figure 3 It is a cross-sectional view of a parallel canned motor pump provided by an embodiment of the utility model;

[0027] Figure 4 It is a structural schematic diagram of the third angle of the parallel canned motor pump provided by the embodiment of the utility model;

[0028] Figure 5 It is a circuit principle diagram of a parallel canned motor pump provided in an embodiment of the utility model.

[0029] In the figure:

[0030] 1. Pump body; 2. First motor; 3. First impeller; 4. Second motor; 5. Second impeller; 6. Switch valve; 7. First junction box; 8. Second junction box; 9. First switch; 10. Second switch; 20. Cable;

[0031] 11. input part; 12. output part; 13. confluence part; 14. first accommodating part; 15. second accommodating part; 16. first communicating input part; 17. second communicating input part; 18. first communicating output part; 19. second communicating output part;

[0032] 111, main input port; 121, main output port; 131, confluence chamber; 141, first accommodating chamber; 151, second accommodating chamber; 181, first output port; 191, second output port. DETAILED DESCRIPTION

[0033] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the utility model, rather than to limit the utility model. It is also necessary to explain that, for the convenience of description, only the parts related to the utility model are shown in the accompanying drawings, rather than all.

[0034] Some directional words are defined in the present utility model. Unless otherwise specified, the directional words used, such as "upper", "lower", "left", "right", "inside" and "outside", are used for ease of understanding and therefore do not constitute limitations on the protection scope of the present utility model.

[0035] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] This embodiment provides a parallel canned pump, which is used for fluid circulation to supply water or heat. The parallel canned pump can meet the user's high flow or low flow requirements by changing the operation mode, and can ensure the high efficiency operation of the parallel canned pump and extend its service life.

[0038] like Figure 1-Figure 5 As shown, the parallel canned pump includes a pump body 1, a first impeller 3, a second impeller 5 and a switch valve 6. The pump body 1 includes a first accommodating portion 14 and a second accommodating portion 15 that are independent of each other. The pump body 1 has a total output port 121, a confluence cavity 131, a first output port 181 and a second output port 191. The first accommodating portion 14 is connected to the first output port 181, and the second accommodating portion 15 is connected to the second output port 191. The first output port 181 and the second output port 191 can be connected to the confluence cavity 131 respectively. The total output port 121 is connected to the confluence cavity 131. The first impeller 3 is rotatably disposed in the first accommodating portion 14, the second impeller 5 is rotatably disposed in the second accommodating portion 15, and the switch valve 6 is rotatably disposed in the confluence chamber 131. The switch valve 6 forms a first position, a second position and a third position by rotating. When the switch valve 6 is located at the first position, the switch valve 6 blocks the first output port 181; when the switch valve 6 is located at the second position, the switch valve 6 blocks the second output port 191; when the switch valve 6 is located at the third position, the switch valve 6 does not block the first output port 181 and the second output port 191.

[0039] By rotating the first impeller 3 and / or the second impeller 5, the operating mode of the parallel canned pump can be changed to meet the user's large flow or small flow requirements, and the first impeller 3 and the second impeller 5 are both operated in the rated mode, which can ensure the high-efficiency operation of the parallel canned pump and extend its service life.

[0040] Specifically, when the first impeller 3 or the second impeller 5 rotates, that is, when only one of the first impeller 3 and the second impeller 5 is running, the running impeller pumps the fluid to the corresponding output port, and the switch valve 6 rotates under the impact of the fluid, thereby blocking the output port corresponding to the impeller that is not running, that is, the switch valve 6 is located in the first position or the second position, and then the fluid enters the confluence cavity 131 and flows out of the pump body 1 through the total output port 121, thereby realizing the user's small flow demand; when the first impeller 3 and the second impeller 5 are running at the same time, the two impellers The fluid is pumped to the corresponding output ports. Since the impact forces of the fluids on both sides of the switch valve 6 are equal, the switch valve 6 stays in the middle position of the confluence chamber 131, that is, the third position of the switch valve 6. The switch valve 6 blocks neither the first output port 181 nor the second output port 191. The fluids at the first output port 181 and the second output port 191 both enter the confluence chamber 131 and flow out of the pump body 1 through the total output port 121. Compared with when a single impeller is running, the flow rate is doubled, meeting the customer's large flow rate requirements.

[0041] The switch valve 6 is simple in structure, easy to install, and has low manufacturing and installation costs. The switch valve 6 is small in size and requires a small installation space. The applicable flow rate is less than 10 cubic meters per hour and the head is 10 meters. Of course, other values ​​can also be used, which can be set according to the actual conditions such as the strength of the switch valve 6 and the flow rate of the fluid.

[0042] Compared with the method of adding additional pumps with the same flow rate, the parallel canned pump provided in this embodiment reduces the difficulty of on-site installation and also reduces the demand for a large installation space.

[0043] like Figure 1 and Figure 2 As shown, the parallel canned motor pump further includes a first motor 2 and a second motor 4, wherein the first housing of the first motor 2 is mounted on the first accommodating portion 14, the output end of the first motor 2 is connected to the first impeller 3, the second housing of the second motor 4 is mounted on the second accommodating portion 15, and the output end of the second motor 4 is connected to the second impeller 5. The first motor 2 can drive the first impeller 3 to rotate, and the second motor 4 can drive the second impeller 5 to rotate.

[0044] Furthermore, the pump body 1 further comprises an output portion 12 , and a main output port 121 is provided on the output portion 12 .

[0045] Furthermore, the pump body 1 further comprises a confluence portion 13 , the confluence portion 13 and the output portion 12 are integrally formed, and the confluence cavity 131 is provided on the confluence portion 13 .

[0046] like Figure 1-Figure 3As shown, the pump body 1 further includes a first communication output portion 18 , the first communication output portion 18 has a first output port 181 , and the first communication output portion 18 is integrally formed with the confluence portion 13 and the first accommodation portion 14 .

[0047] Correspondingly, the pump body 1 further comprises a second communication output portion 19 , the second communication output portion 19 has a second output port 191 , and the second communication output portion 19 is integrally formed with the confluence portion 13 and the second accommodation portion 15 , respectively.

[0048] Furthermore, the first accommodating portion 14 has a first accommodating cavity 141 , the second accommodating portion 15 has a second accommodating cavity 151 , the first impeller 3 is rotatably disposed in the first accommodating cavity 141 , and the second impeller 5 is rotatably disposed in the second accommodating cavity 151 .

[0049] Specifically, the first accommodating chamber 141 is communicated with the first output port 181 , and the second accommodating chamber 151 is communicated with the second output port 191 .

[0050] Furthermore, the pump body 1 further comprises an input portion 11 , wherein the input portion 11 has a main input port 111 , and the main input port 111 is communicated with the first accommodating chamber 141 and the second accommodating chamber 151 , respectively.

[0051] Furthermore, the pump body 1 also includes a first connecting input part 16 and a second connecting input part 17, the input part 11 is respectively integrally formed with the first connecting input part 16 and the second connecting input part 17, the first connecting input part 16 is integrally formed with the first accommodating part 14, the second connecting input part 17 is integrally formed with the second accommodating part 15, the first accommodating chamber 141 is connected to the main input port 111 through the first connecting input part 16, and the second accommodating chamber 151 is connected to the main input port 111 through the second connecting input part 17.

[0052] like Figure 3 As shown, the confluence chamber 131 is fan-shaped, and the total output port 121 passes through the arc-shaped inner wall of the confluence chamber 131. Such a configuration enables the switch valve 6 to have good adaptability with the confluence chamber 131 when rotating, can play a good blocking role, and will not cause motion interference, and can prevent fluid backflow.

[0053] Furthermore, the size of the total output port 121 is larger than the size of the contact surface between the switch valve 6 and the arc-shaped inner wall of the confluence chamber 131. When the first impeller 3 and the second impeller 5 are running at the same time, the two impellers pump the fluid to their respective corresponding output ports, and the impact force of the fluid on both sides of the switch valve 6 is equal, that is, the switch valve 6 stays in the middle position of the confluence chamber 131, that is, the third position of the switch valve 6. At this time, due to the size limitation of the switch valve 6, the switch valve 6 cannot block the total output port 121, and the switch valve 6 does not block the first output port 181 or the second output port 191. The fluids of the first output port 181 and the second output port 191 both enter the confluence chamber 131 and flow out of the pump body 1 through the total output port 121. Compared with the operation of a single impeller, the flow rate is doubled to meet the customer's large flow demand.

[0054] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the parallel canned motor pump also includes a control module, which can control the start and stop and operating time of the first motor 2 and the second motor 4, and then control the start and stop and operating time of the rotation of the first impeller 3 and the second impeller 5, so as to realize the switching of the parallel canned motor pump between different operating modes.

[0055] Further, the control module includes a first control component and a second control component, the first control component corresponds to the first motor 2, the second control component corresponds to the second motor 4, the first control component and the second control component both include an intermediate relay and a time relay, the intermediate relay can control the start and stop of the first motor 2 or the second motor 4 by powering on and off, and the time relay can time and control the power on and off of the intermediate relay. After the timing of the time relay ends, the start and stop of the motor can be achieved by controlling the power on and off of the intermediate relay, thereby achieving the control of the running time of the motor.

[0056] Furthermore, when the intermediate relay in the first control component is powered off, the first motor 2 stops working; when the intermediate relay in the second control component is powered off, the second motor 4 stops working.

[0057] Furthermore, when the intermediate relay in the first control component is powered off, the time relay in the second control component is powered on and works; when the intermediate relay in the second control component is powered off, the time relay in the first control component is powered on and works. This arrangement realizes the mutual restriction and mutual connection between the two motors, thereby realizing the switching between different modes.

[0058] Furthermore, the parallel canned pump also includes a first junction box 7 and a second junction box 8, the first junction box 7 is installed on the first housing of the first motor 2, the second junction box 8 is installed on the second housing of the second motor 4, the first control component is installed in the first junction box 7, and the second control component is installed in the second junction box 8.

[0059] Furthermore, the parallel shielded pump also includes a cable 20, which connects the first junction box 7 and the second junction box 8, and the connection between the components in the first junction box 7 and the second junction box 8 (mainly between the intermediate relay in the first control component and the time relay in the second control component, and between the intermediate relay in the second control component and the time relay in the first control component) is connected through the cable 20.

[0060] Furthermore, the parallel canned pump also includes a first switch 9 and a second switch 10. The first switch 9 is installed on the first junction box 7, and the second switch 10 is installed on the second junction box 8. The first switch 9 is used for gear changing of the first motor 2, and the second switch 10 is used for gear changing of the second motor 4.

[0061] Specifically, the parallel canned motor pump has three operating modes: standby mode, parallel mode and single pump mode. In standby mode, the first motor 2 runs for 12 hours and then switches to the second motor 4 to run for 12 hours, and the first motor 2 and the second motor 4 run in this cycle; in parallel mode, the first motor 2 and the second motor 4 run at the same time; in single pump mode, only one of the first motor 2 and the second motor 4 runs, which is suitable for the situation where one of the two motors fails. By switching between the above three modes, different flow requirements of users can be met, energy consumption is reduced, and the service life of the parallel canned motor pump is extended.

[0062] In order to specifically explain the specific control process of the control module in the above three operating modes, the circuit in the control module is first introduced.

[0063] like Figure 5 As shown, in the first control component, the intermediate relay is KM1, the time relay is KT1, and the first switch 9 is the sliding switch SW1; in the second control component, the intermediate relay is KM2, the time relay is KT2, the second switch 10 is the sliding switch SW2, N is the neutral wire, and L is the live wire.

[0064] Specifically, the sliding switch SW1 realizes the shifting of the gear position by sliding, the contact 4 of the sliding switch SW1 is disconnected, and the contact 5 and the contact 6 are both connected to the live wire L. When the contact 3 and the contact 4 of the sliding switch SW1 are connected, the sliding switch SW1 is in the single pump gear position; when the contact 2 and the contact 5 of the sliding switch SW1 are connected, the sliding switch SW1 is in the standby mode gear position; when the contact 1 and the contact 6 of the sliding switch SW1 are connected, the sliding switch SW1 is in the standby gear position.

[0065] Correspondingly, the sliding switch SW2 realizes the shifting of the gear position by sliding, the contact 4 of the sliding switch SW2 is disconnected, and the contact 5 and the contact 6 are both connected to the live wire L. When the contact 3 and the contact 4 of the sliding switch SW2 are connected, the sliding switch SW2 is in the single pump gear position; when the contact 2 and the contact 5 of the sliding switch SW2 are connected, the sliding switch SW2 is in the standby mode gear position; when the contact 1 and the contact 6 of the sliding switch SW2 are connected, the sliding switch SW2 is in the standby gear position.

[0066] The common terminal 9 of the intermediate relay KM1 is connected to the neutral line N, the normally closed terminal 1 of the intermediate relay KM1 is connected to the common terminal 9 of the time relay KT2 in the second control component, the normally open terminal 5 of the intermediate relay KM1 is connected to the winding of the first motor 2, and the winding of the first motor 2 is also connected to the live wire L. When the intermediate relay KM1 is powered off, the common terminal 9 of the intermediate relay KM1 contacts the normally closed terminal 1 of the intermediate relay KM1 to form a path; when the intermediate relay KM1 is powered on, the common terminal 9 of the intermediate relay KM1 contacts the normally open terminal 5 of the intermediate relay KM1 to form a path. In other words, when the intermediate relay KM1 is powered on, the first motor 2 starts; when the intermediate relay KM1 is powered off, the first motor 2 stops working, and the common terminal 9 of the time relay KT2 is connected to the neutral line N.

[0067] Correspondingly, the common terminal 9 of the intermediate relay KM2 is connected to the neutral line N, the normally closed terminal 1 of the intermediate relay KM2 is connected to the common terminal 9 of the time relay KT1, the normally open terminal 5 of the intermediate relay KM2 is connected to the winding of the second motor 4, and the winding of the second motor 4 is also connected to the live wire L. When the intermediate relay KM2 is powered off, the common terminal 9 of the intermediate relay KM2 contacts the normally closed terminal 1 of the intermediate relay KM2 to form a path; when the intermediate relay KM2 is powered on, the common terminal 9 of the intermediate relay KM2 contacts the normally open terminal 5 of the intermediate relay KM2 to form a path. In other words, when the intermediate relay KM2 is powered on, the second motor 4 starts; when the intermediate relay KM2 is powered off, the second motor 4 stops working, and the common terminal 9 of the time relay KT1 is connected to the neutral line N.

[0068] Furthermore, the common terminal 9 of the time relay KT1 is connected to the normally closed terminal 1 of the intermediate relay KM2, the normally closed terminal 1 of the time relay KT1 is respectively connected to the sliding switch SW1 and the contact 13 of the electromagnet of the intermediate relay KM1, the normally open terminal 5 of the time relay KT1 disconnects the circuit, and the contact 14 of the electromagnet of the intermediate relay KM1 is connected to the winding of the first motor 2. That is to say, when the intermediate relay KM2 is powered off and the sliding switch SW1 is in the standby mode position or the standby position, the time relay KT1 is powered on and working, the common terminal 9 of the time relay KT1 contacts the normally closed terminal 1, and the timing of the time relay KT1 starts. At this time, the contact 13 of the electromagnet of the intermediate relay KM1 is connected to the neutral line N, and the contact 14 of the electromagnet of the intermediate relay KM1 is connected to the winding of the first motor 2. Since the winding of the first motor 2 is connected to the live wire L, the electromagnet of the intermediate relay KM1 is in a powered state, that is, the common terminal 9 of the intermediate relay KM1 contacts the normally open terminal 5 of the intermediate relay KM1 to form a pathway, and the first motor 2 starts; after the timing ends, the time relay KT1 is powered off, the common terminal 9 of the time relay KT1 contacts the normally open terminal 5, the electromagnet of the intermediate relay KM1 is powered off, the common terminal 9 of the intermediate relay KM1 contacts the normally closed terminal 1 of the intermediate relay KM1, and the first motor 2 stops working. The time relay KT1 is connected to the electromagnet of the intermediate relay KM1 to control the start and stop and the running time of the first motor 2 .

[0069] Furthermore, the common terminal 9 of the time relay KT2 is connected to the normally closed terminal 1 of the intermediate relay KM1, the normally closed terminal 1 of the time relay KT2 is respectively connected to the contact 13 of the sliding switch SW2 and the electromagnet of the intermediate relay KM2, the normally open terminal 5 of the time relay KT2 disconnects the circuit, and the contact 14 of the electromagnet of the intermediate relay KM2 is connected to the winding of the second motor 4. That is to say, when the intermediate relay KM1 is powered off and the sliding switch SW2 is in the standby mode position or the standby position, the time relay KT2 is powered on and working, the common terminal 9 of the time relay KT2 is in contact with the normally closed terminal 1, and the timing of the time relay KT2 starts. At this time, the contact 13 of the electromagnet of the intermediate relay KM2 is connected to the neutral line N, and the contact 14 of the electromagnet of the intermediate relay KM2 is connected to the winding of the second motor 4. Since the winding of the second motor 4 is connected to the live wire L, the electromagnet of the intermediate relay KM2 is in a energized state, that is, the common terminal 9 of the intermediate relay KM2 is in contact with the normally open terminal 5 of the intermediate relay KM2 to form a pathway, and the second motor 4 starts; after the timing ends, the time relay KT2 is powered off, the common terminal 9 of the time relay KT2 is in contact with the normally open terminal 5, the electromagnet of the intermediate relay KM2 is powered off, the common terminal 9 of the intermediate relay KM2 is in contact with the normally closed terminal 1 of the intermediate relay KM2, and the second motor 4 stops working. The time relay KT2 is connected to the electromagnet of the intermediate relay KM2 to control the start and stop and the running time of the second motor 4.

[0070] In addition, the intermediate relay KM1 and the intermediate relay KM2 may be directly energized so that the intermediate relay KM1 and the intermediate relay KM2 are not affected by the time relay KT2 and the time relay KT1.

[0071] In standby mode, both slide switches SW1 and SW2 select the standby mode gear. First, the intermediate relay KM2 and the time relay KT2 are both powered off, then the time relay KT1 is powered on, and the electromagnet of the intermediate relay KM1 is also powered on. The electromagnet of the intermediate relay KM1 makes the common terminal 9 of the intermediate relay KM1 contact with the normally open terminal 5 to form a path, the first motor 2 is started, and the first motor 2 drives the first impeller 3 to rotate. At the same time, the timing of the time relay KT1 starts and ends, the time relay KT1 is powered off, the common terminal 9 of the time relay KT1 contacts with the normally open terminal 5, the electromagnet of the intermediate relay KM1 is powered off, and the common terminal 9 of the intermediate relay KM1 contacts with the normally closed terminal 1 of the intermediate relay KM1. The first motor 2 stops working; after the intermediate relay KM1 and the time relay KT1 are both powered off, the time relay KT2 is powered on, and the electromagnet of the intermediate relay KM2 is also powered on, so that the common terminal 9 of the intermediate relay KM2 contacts the normally open terminal 5 to form a path, the second motor 4 is started, and the second motor 4 drives the second impeller 5 to rotate. At the same time, the timing of the time relay KT2 starts, and the timing ends. The time relay KT2 is powered off, the common terminal 9 of the time relay KT2 contacts the normally open terminal 5, the electromagnet of the intermediate relay KM2 is powered off, the common terminal 9 of the intermediate relay KM2 contacts the normally closed terminal 1 of the intermediate relay KM2, and the second motor 4 stops working; then, the first motor 2 works, and the cycle continues...

[0072] In the present embodiment, the timing time of the time relay KT1 and the time relay KT2 can be 12 hours. Of course, it can also be other identical times, and the timing time of the time relay KT1 and the timing time of the time relay KT2 can also be different times, which can be set according to actual conditions.

[0073] In parallel mode, the sliding switches SW1 and SW2 both select the single pump gear, and the time relays KT1 and KT2 are in an isolated state and are not connected to the circuit, that is, the time relays KT1 and KT2 do not work. The first motor 2 and the second motor 4 can be started simultaneously by directly energizing the intermediate relays KM1 and KM2.

[0074] In single pump mode, one of the sliding switches SW1 and SW2 selects the single pump gear and the other selects the standby gear. In order to facilitate the description of the specific control process, the sliding switch SW1 selects the single pump gear and the sliding switch SW2 selects the standby gear. The time relay KT1 is in an isolated state and is not connected to the circuit, that is, the time relay KT1 does not work, and the intermediate relay KM1 is always energized. The first motor 2 starts. Since the intermediate relay KM1 is always energized, the time relay KT2 is de-energized, and the electromagnet of the intermediate relay KM2 is also de-energized, that is, the common terminal 9 of the intermediate relay KM2 is connected to the normally closed terminal 1, and the second motor 4 is not started, that is, the first motor 2 is always running, and the second motor 4 is never started.

[0075] Although the utility model has been described in detail above by means of general description, specific implementation methods and tests, it is obvious to those skilled in the art that some modifications or improvements can be made to the utility model. Therefore, these modifications or improvements made without departing from the spirit of the utility model are within the scope of protection claimed by the utility model.

Claims

1. A parallel canned motor pump, characterized in that: include: A pump body (1), comprising a first accommodating portion (14) and a second accommodating portion (15) which are independent of each other, the pump body (1) having a total output port (121), a confluence cavity (131), a first output port (181) and a second output port (191), the first accommodating portion (14) being connected to the first output port (181), the second accommodating portion (15) being connected to the second output port (191), the first output port (181) and the second output port (191) being able to be connected to the confluence cavity (131) respectively, and the total output port (121) being connected to the confluence cavity (131); A first impeller (3) rotatably disposed in the first accommodation portion (14); a second impeller (5) rotatably disposed in the second accommodation portion (15); The switch valve (6) is rotatably arranged in the confluence chamber (131). The switch valve (6) forms a first position, a second position and a third position by rotating. When the switch valve (6) is in the first position, the switch valve (6) blocks the first output port (181); when the switch valve (6) is in the second position, the switch valve (6) blocks the second output port (191); when the switch valve (6) is in the third position, the switch valve (6) does not block the first output port (181) and the second output port (191).

2. The parallel canned motor pump according to claim 1, characterized in that: The confluence chamber (131) is fan-shaped, and the total output port (121) passes through the arc-shaped inner wall of the confluence chamber (131).

3. The parallel canned motor pump according to claim 1, characterized in that: The first accommodating portion (14) has a first accommodating cavity (141), the second accommodating portion (15) has a second accommodating cavity (151), the first impeller (3) is rotatably disposed in the first accommodating cavity (141), and the second impeller (5) is rotatably disposed in the second accommodating cavity (151).

4. The parallel canned motor pump according to claim 3, characterized in that: The pump body (1) further comprises an input portion (11), wherein the input portion (11) has a main input port (111), and the main input port (111) is respectively connected to the first accommodating chamber (141) and the second accommodating chamber (151).

5. The parallel canned motor pump according to claim 1, characterized in that: The parallel canned motor pump further comprises a first motor (2) and a second motor (4), wherein a first housing of the first motor (2) is mounted on the first accommodating portion (14), and an output end of the first motor (2) is connected to the first impeller (3); a second housing of the second motor (4) is mounted on the second accommodating portion (15), and an output end of the second motor (4) is connected to the second impeller (5).

6. The parallel canned motor pump according to claim 5, characterized in that: The parallel canned motor pump further comprises a control module, wherein the control module is capable of controlling the start and stop and the running time of the first motor (2) and the second motor (4).

7. The parallel canned motor pump according to claim 6, characterized in that: The control module comprises a first control component and a second control component, wherein the first control component corresponds to the first motor (2), and the second control component corresponds to the second motor (4), and the first control component and the second control component both comprise an intermediate relay and a time relay, wherein the intermediate relay can control the start and stop of the first motor (2) or the second motor (4) by powering on and off, and the time relay can time and control the powering on and off of the intermediate relay.

8. The parallel canned motor pump according to claim 7, characterized in that: When the intermediate relay in the first control component is powered off, the first motor (2) stops working; when the intermediate relay in the second control component is powered off, the second motor (4) stops working.

9. The parallel canned motor pump according to claim 8, characterized in that: When the intermediate relay in the first control component is powered off, the time relay in the second control component is powered on and works; when the intermediate relay in the second control component is powered off, the time relay in the first control component is powered on and works.

10. A water supply and heating system, characterized in that: It comprises a parallel canned motor pump as described in any one of claims 1 to 9.

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