High-low pressure steam condensate system tie-in pump and control method

Abstract

The application discloses a high-low pressure steam condensate water system grid-connected pump and a control method, a float bucket part is arranged in a working box and comprises a float bucket of positive placement and a connecting piece connected to the float bucket and extending upward out of the float bucket, the float bucket is automatically driven to drive a first lever and a second lever, and finally the opening and closing of steam inlet holes and steam outlet holes are automatically controlled; the high-low pressure steam condensate water system grid-connected pump and the control method provided by the application can provide power for the entire grid-connected pump under the condition of small energy consumption by connecting steam, air and other incompressible gases on an inlet joint, automatic circulation between inflow process, pressure increasing process, discharge process and pressure equalizing process is realized by using the floating and sinking of the float bucket; the inflowed condensate water is connected to a condensate water pipeline generated by a high-pressure steam system, pipeline investment is saved, an electric cabinet does not need to be arranged, no one needs to be on duty, no pit is needed, the condensate water temperature does not need to be reduced, condensate water recovery amount and temperature are improved, energy consumption is saved, and environmental protection is facilitated.

Description

Technical Field

[0001] This invention relates to the field of condensate treatment equipment, and particularly to a grid-connected pump and control method for a high and low pressure steam condensate system. Background Technology

[0002] In existing technologies, the traditional method for recovering condensate in steam processing systems is to use centrifugal pumps. However, this method suffers from severe cavitation of the pump blades due to the high temperature of the water. Condensate recovery scenarios mainly include discharging condensate from a vacuum zone into the atmosphere and transporting condensate from a low-pressure zone to a high-pressure zone. Some types of steam equipment require steam pressures lower than atmospheric pressure (e.g., evaporators), and their condensate needs to be discharged into atmospheric pressure (the outside world), i.e., from the vacuum zone into the atmosphere. Transporting condensate from a low-pressure zone to a high-pressure zone means discharging condensate to a location with a pressure higher than that of the steam-using equipment. For example, condensate from a steam-using equipment with a pressure of 1 kgf / cm² and condensate from a steam-using equipment requiring a pressure of 7 kgf / cm² share a condensate recovery pipeline.

[0003] Traditional solutions to address the negative impacts of high-temperature condensate involve installing underground collection tanks to collect the condensate for natural cooling. Then, suitable auxiliary cooling methods need to be selected, and finally, centrifugal pumps are used to pump the condensate to the desired locations. These solutions require independent electrical control boxes, involve significant investment, and necessitate manual monitoring. Summary of the Invention

[0004] The main objective of this invention is to provide a grid-connected pump and control method for high and low pressure steam condensate systems, aiming to solve the problems of complex condensate pumping structures, easy pump cavitation, and complex control.

[0005] To achieve the above objectives, the present invention provides a grid-connected pump for a high and low pressure steam condensate system, comprising:

[0006] A closed working chamber includes an upper shell and a lower barrel connected to each other, wherein the upper shell is provided with a steam inlet and a steam outlet;

[0007] The float section is disposed inside the working box and includes an upright float and a connector connected to the float and extending upward out of the float;

[0008] The first lever has one end hinged to the upper end of the connector and the other end connected to an upwardly mounted first rod. The free end of the first rod is provided with a first sealing plug, which is positioned above the steam inlet.

[0009] Second lever, one end is hinged to the upper end of the connecting piece, the other end is connected with the second rod arranged in the upward direction, the free end of the second rod is provided with a second sealing plug, and the second sealing plug is arranged below the steam outlet hole;

[0010] Water inlet pipe, which is connected to the inner wall of the lower barrel, and the water inlet one-way valve is arranged on the water inlet pipe and points to the working box in the direction of the water inlet pipe;

[0011] Water outlet pipe, which is connected to the inner wall of the lower barrel, and the water inlet one-way valve is arranged on the water inlet pipe and points to the working box in the direction of the water inlet pipe;

[0012] The inlet joint is covered and connected above the steam inlet hole, and forms a circumferential gap with the first sealing plug, wherein the first sealing plug blocks the inlet joint when the first lever moves upward.

[0013] Further, the upper surface of the upper shell is provided with an external threaded column, the connecting piece is slidably arranged through the external threaded column, an internal threaded sleeve corresponding to the external threaded column is arranged, the top of the connecting piece is provided with a baffle, and a rotationally free coil spring is connected between the baffle and the internal threaded sleeve.

[0014] Further, the upper shell is provided with a driving motor, and a controller corresponding to the driving motor is arranged, wherein the driving motor drives the internal threaded sleeve to rotate when working.

[0015] Further, the working box is provided with a gas pressure gauge for the gas pressure in the working box, and the gas pressure gauge is electrically connected to the controller.

[0016] Further, the position of the first lever in the height direction of the connecting piece is adjustable, and the position of the second lever in the height direction of the connecting piece is adjustable.

[0017] Further, the end of the water outlet pipe in the floating barrel is made of rubber.

[0018] Further, a buoyancy piece is arranged at the middle position in the height direction of the connecting piece.

[0019] Further, the connecting piece is in the shape of a rod and is connected to the center position of the bottom of the floating barrel.

[0020] The application also provides a control method applied to the high-low pressure steam condensate water system grid-connected pump, comprising:

[0021] S1, obtaining the gas pressure signal sent by the gas pressure gauge;

[0022] S2, if the periodicity of the gas pressure signal disappears and is consistent with the atmospheric pressure, an alarm is given that the position of the water inlet pipe works abnormally;

[0023] S3. If the periodic disappearance of the air pressure signal is followed by a continuous increase that exceeds the first preset pressure, a warning is given that the water outlet pipe is malfunctioning.

[0024] S4. If the air pressure signal is periodic but the period changes, a warning will be given that the water inlet pipe is malfunctioning.

[0025] S5. If the air pressure signal is periodic and the period does not change but the maximum value increases, a warning is given that the temperature of the condensate in the outlet pipe is too high.

[0026] S6. If the air pressure signal is periodic and the period does not change but the minimum value decreases, a warning is given that the condensate temperature in the outlet pipe is too low.

[0027] Further, step S4 is followed by:

[0028] The drive motor is controlled to rotate clockwise or counterclockwise on the internal threaded sleeve depending on the direction of the period deviation.

[0029] The present invention provides a high and low pressure steam condensate system grid-connected pump and control method. The float section is set in the working box and includes an upright float and a connector connected to the float and extending upward from the float. The floating of the float automatically drives the first lever and the second lever, and finally automatically controls the opening and closing of the steam inlet and steam outlet. By connecting steam, air and other incompressible gases to the inlet connector, the power of the entire grid-connected pump is provided with low energy consumption. The floating and sinking of the float realizes the automatic circulation between the inflow process, the pressurization process, the discharge process and the pressure equalization process. The inflowing condensate is connected to the condensate pipeline generated by the high pressure steam system, which saves pipeline investment, eliminates the need for electric cabinet, requires no on-site operation, eliminates the need for pit, and eliminates the need to reduce the condensate temperature. It increases the condensate recovery rate and temperature, saves energy consumption and is beneficial to environmental protection. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the grid-connected pump for the high and low pressure steam condensate system according to the first embodiment of the present invention;

[0031] Figure 2 This is a cross-sectional view (first position) of the grid-connected pump of the high and low pressure steam condensate system according to the first embodiment of the present invention;

[0032] Figure 3 This is a cross-sectional view (second position) of the grid-connected pump of the high and low pressure steam condensate system according to the first embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the working state (inflow process) of the grid-connected pump of the high and low pressure steam condensate system according to the first embodiment of the present invention;

[0034] Figure 5 is the working state diagram of the high-low pressure steam condensate water system grid-connected pump of the first embodiment of the present application (pressure boosting process);

[0035] Figure 6 is the working state diagram of the high-low pressure steam condensate water system grid-connected pump of the first embodiment of the present application (discharge process);

[0036] Figure 7 is the working state diagram of the high-low pressure steam condensate water system grid-connected pump of the first embodiment of the present application (pressure equalization process);

[0037] Figure 8 is the sectional view of the high-low pressure steam condensate water system grid-connected pump of the second embodiment of the present application.

[0038] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0039] It should be understood that the specific embodiments described herein merely set forth preferred combinations of components and / or other features, and that persons of ordinary skill in the technical field can make various changes and / or modifications to the embodiments described herein without departing from the scope of the present application which is set forth not by the preceding description but by the claims that follow. It is therefore contemplated to be covered by the claims of the present application that follow.

[0040] Those skilled in the art can understand that the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It should also be understood that the use of the term "including" in the specification of the application herein, means that there are other features, integers, steps, operations, elements, units, modules, and / or groups that can be added to the combinations described herein without departing from the scope of the present application. It should be understood that when we say an element is "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or there can be an intermediate element. In addition, "connected" or "coupled" as used herein can include wireless connection or wireless coupling. The phrase "and / or" as used herein includes all or any combination of one or more associated listed items.

[0041] Those skilled in the art can understand that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as that understood by a person of ordinary skill in the art to which the present application belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have meanings consistent with those in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as such.

[0042] Referring to Figures 1 to 8 , in an embodiment of the present application, a high-low pressure steam condensate water system grid-connected pump comprises:

[0043] The closed working tank 100 comprises an upper shell 120 and a lower barrel 110 connected with each other, and the upper shell 120 is provided with a steam inlet hole 121 and a steam outlet hole 122;

[0044] The floating barrel part 200 is arranged in the working tank 100 and comprises a floating barrel 210 arranged vertically and a connecting piece 220 connected to the floating barrel 210 and extending upwardly out of the floating barrel 210;

[0045] The first lever 300 is hingedly connected to the upper end of the connecting piece 220, and the other end is connected with a first rod 310 arranged upwardly, and the free end of the first rod 310 is provided with a first sealing plug 320 arranged above the steam inlet hole 121;

[0046] The second lever 400 is hingedly connected to the upper end of the connecting piece 220, and the other end is connected with a second rod 410 arranged upwardly, and the free end of the second rod 410 is provided with a second sealing plug 420 arranged below the steam outlet hole 122;

[0047] The water inlet pipe 500 is connected to the inner wall of the lower barrel 110, and the water inlet pipe 500 is provided with a water inlet one-way valve 510 with a direction pointing to the working tank 100;

[0048] The water outlet pipe 600 is connected to the working tank 100 from the inside of the floating barrel 210, and the water outlet pipe 600 is provided with a water outlet one-way valve 610 with a direction away from the working tank 100;

[0049] The inlet connector 700 is arranged above the steam inlet hole 121 and is in circumferential gap cooperation with the first sealing plug 320, and when the first lever 300 moves upwardly, the first sealing plug 320 blocks the inlet connector 700.

[0050] In the prior art, in order to solve the negative effects of high-temperature condensate water, a traditional scheme is to set a water collecting tank underground to collect condensate water to achieve natural cooling, then a suitable auxiliary cooling method needs to be selected, and finally a centrifugal pump is used to pump the condensate water to the required place. The above solution needs to set an independent distribution box, and has large investment and needs manual attendance, and the cavitation problem is serious.

[0051] In the present application, the closed working tank 100 serves as the structural basis of the entire high-low pressure steam condensate water system and grid-connected pump. The closed working tank 100 comprises an upper shell 120 and a lower barrel 110 connected with each other, and the upper shell 120 is provided with a steam inlet hole 121 and a steam outlet hole 122. The steam inlet hole 121 and the steam outlet hole 122 are respectively the positions of steam inflow and steam outflow.

[0052] The float bucket 200 is arranged in the working tank 100 and includes a vertically arranged float bucket 210 and a connecting member 220 connected to the float bucket 210 and extending upwardly out of the float bucket 210. The float bucket 210 is used to achieve the up-and-down floating, and the connecting member 220 is the final floating force output end.

[0053] One end of the first lever 300 in the length direction is hingedly connected to the upper end of the connecting member 220, and the other end in the length direction is connected to the first rod 310 arranged upwardly. The fulcrum of the first lever 300 can be connected to the upper shell 120 or the lower bucket 110. The free end of the first rod 310 is provided with the first sealing plug 320 arranged above the steam inlet hole 121. When the float bucket 200 floats up, the first rod 310 is pulled down, and when it is pulled down to a certain position, the first sealing plug 320 closes the steam inlet hole 121, and when the float bucket 200 sinks, the first rod 310 is pushed up, and the first sealing plug 320 continuously separates from the steam inlet hole 121.

[0054] One end of the second lever 400 in the length direction is hingedly connected to the upper end of the connecting member 220, and the other end in the length direction is connected to the second rod 410 arranged upwardly. The fulcrum of the second lever 400 can be connected to the upper shell 120 or the lower bucket 110. The free end of the second rod 410 is provided with the second sealing plug 420 arranged below the steam outlet hole 122. When the float bucket 200 floats up, the second rod 410 is pulled down, and the second sealing plug 420 continuously separates from the steam outlet hole 122; and when the float bucket 200 sinks, the second rod 410 is pushed up, and when it is pushed up to a certain position, the second sealing plug 420 closes the steam outlet hole 122. It should be noted that the connecting member 220 is not limited to a rod-shaped structure, and can even be two independent rod bodies connected to the first lever 300 and the second lever 400, respectively.

[0055] The water inlet pipe 500 is connected to the inner wall of the lower bucket 110, and the water inlet one-way valve 510 is arranged on the water inlet pipe 500 and directed to the working tank 100. The water inlet pipe 500 is used to access the condensed water. The water inlet pipe 500 is connected to the working tank 100 and corresponds to the gap formed between the working tank 100 and the circumferential direction of the float bucket 210. The water inlet pipe 500 needs to inject a certain amount of condensed water into the lower bucket 110 in priority, and then the condensed water enters the float bucket 210. The water inlet one-way valve 510 is arranged on the water inlet pipe 500 and directed to the working tank 100, so that the condensed water in the float bucket 210 cannot flow back from the water inlet pipe 500.

[0056] The outlet pipe 600 is connected from the floating bucket 210 to the working chamber 100, and the outlet one-way valve 610 is arranged on the outlet pipe 600 and faces away from the working chamber 100. The outlet pipe 600 is used to guide the condensed water out of the floating bucket 210. When the pressure generated by the steam injected into the lower bucket 110 exceeds a certain value, the condensed water in the floating bucket 210 is pressed out of the outlet pipe 600. Fluids outside the outlet one-way valve 610 cannot enter the floating bucket 210 from the outlet pipe 600.

[0057] The inlet joint 700 covers the steam inlet hole 121 and forms a circumferential gap with the first sealing plug 320. When the first lever 300 is moved upward, the first sealing plug 320 blocks the inlet joint 700.

[0058] In operation, there are four basic processes:

[0059] The inflow process: the floating bucket part 200 is in the floating position, and the first lever 300 and the second lever 400 are both lifted. At this time, the first sealing plug 320 is combined with the steam inlet hole 121, so that steam no longer enters, the second sealing plug 420 is separated from the steam outlet hole 122, so that the working chamber 100 is in a low-pressure condition, and finally the condensed water at the outlet pipe 600 flows in. The water first enters the gap between the floating bucket 210 and the lower bucket 110, and then flows into the floating bucket 210.

[0060] The pressure boosting process: when the water in the floating bucket 210 exceeds a certain volume, the floating bucket 210 sinks, and the first lever 300 and the second lever 400 are both pulled down. At this time, the first sealing plug 320 is separated from the steam inlet hole 121, so that steam begins to enter, the second sealing plug 420 is combined with the steam outlet hole 122, so that the steam in the working chamber 100 no longer exits from the steam outlet hole 122. As the pressure in the working chamber 100 rises, the condensed water in the inlet pipe 500 no longer flows in, and the inlet one-way valve 510 ensures that the steam in the working chamber 100 does not leak, and the pressure continues to rise.

[0061] The discharge process: the state of each structure is the same as that in the pressure boosting process, except that when the pressure in the working chamber 100 continues to rise to a certain extent, the condensed water in the floating bucket 210 is pressed along the outlet pipe 600, completing the convergence process of different condensed water.

[0062] The equalization process: when a certain volume of condensed water is discharged, the floating bucket part 200 floats up. At this time, the state of each structure is the same as that in the inflow process, but because the pressure in the working chamber 100 is still relatively high, the condensed water in the inlet pipe 500 will not flow in. As the amount of steam discharged through the steam outlet hole 122 increases, the pressure in the working chamber 100 approaches equilibrium with the outside. Finally, the equalization process transitions to the inflow process.

[0063] In summary, the float bucket part 200 is arranged in the working box 100 and includes the upright float bucket 210 and the connecting piece 220 connected to the float bucket 210 and extending upward out of the float bucket 210, the first lever 300 and the second lever 400 are automatically driven by the floating of the float bucket 210, and the opening and closing of the steam inlet hole 121 and the steam outlet hole 122 are finally automatically controlled; by connecting the steam, air and other incompressible gases on the inlet joint 700, the power of the entire grid-connected pump can be provided under the condition of smaller energy consumption, the automatic circulation between the inflow process, the pressure increasing process, the discharge process and the pressure equalizing process is realized by the floating and sinking of the float bucket 210; the inflow condensate water is connected to the condensate water pipeline generated in the high-pressure steam system, which saves the pipeline investment, does not need to set up an electric cabinet, does not need to be on duty, does not need a pit, does not need to reduce the condensate water temperature, improves the condensate water recovery amount and temperature, saves energy consumption, and is beneficial to environmental protection.

[0064] With reference to Figure 8 In one embodiment, the upper surface of the upper shell 120 is provided with an external threaded column 123, the connecting piece 220 is arranged to slide through the external threaded column 123, an internal threaded sleeve 124 is arranged corresponding to the external threaded column 123, the top of the connecting piece 220 is provided with a baffle 221, and a helical spring 222 with free rotation is connected between the baffle 221 and the internal threaded sleeve 124.

[0065] In this embodiment, the timing of the movement of the first lever 300 and the second lever 400 is adjusted by the action between the helical spring 222 and the connecting piece 220.

[0066] For example, when the helical spring 222 provides a downward pulling force to the baffle 221, the float bucket part 200 needs to provide greater buoyancy to lift the first lever 300 and the second lever 400 during the drainage process, that is, the water in the float bucket 210 needs to be discharged to a greater extent; during the water injection process, the float bucket 210 sinks by injecting less water. In the above arrangement, the water in the self-water inlet pipe 500 flows out through the water outlet pipe 600 relatively quickly, thereby the temperature loss is relatively small.

[0067] On the contrary, when the helical spring 222 provides an upward pushing force to the baffle 221, the float bucket part 200 provides smaller buoyancy during the drainage process, and the first lever 300 and the second lever 400 will lift the first lever 300 and the second lever 400, that is, the water in the float bucket 210 needs to be discharged to a smaller extent. During the water injection process, the float bucket 210 sinks by injecting more water. In the above arrangement, the water in the self-water inlet pipe 500 flows out through the water outlet pipe 600 relatively slowly, thereby providing a basis for the change of the condensate water temperature, for example, a heat exchange system is arranged corresponding to the outer wall of the lower bucket 110, thereby utilizing the latent heat in the condensate water.

[0068] In one embodiment, the upper shell 120 is provided with a driving motor, and a controller is arranged corresponding to the driving motor, and the driving motor drives the inner threaded sleeve 124 to rotate when working.

[0069] In this embodiment, when the driving motor rotates, the inner threaded sleeve 124 is driven to rotate, so that the matching degree between the inner threaded sleeve 124 and the outer threaded column 123 can be controlled and adjusted by the driving motor. The driving mode of the driving motor to the inner threaded sleeve 124 can be various, for example, vertical extending scales are arranged on the outer wall of the inner threaded sleeve 124, so that the outer wall of the inner threaded sleeve 124 forms a gear structure, the output end of the driving motor is engaged with the outer wall of the inner threaded sleeve 124, and when the driving motor works, the inner threaded sleeve 124 also rotates through the gear transmission. In other embodiments, the transmission mode between the driving motor and the inner threaded sleeve 124 can be a belt, and the inner threaded sleeve 124 rotates with longitudinal movement, and the matching structure needs to be designed accordingly.

[0070] In one embodiment, the working tank 100 is provided with a manometer of the air pressure in the working tank 100, and the manometer is electrically connected to the controller.

[0071] In this embodiment, considering that the air pressure value in the working tank 100 can actually reflect the working state of the entire grid-connected pump and the working state of the float bucket 210, a manometer is introduced, and the data obtained by the manometer can be used as a guide for the working state. The manometer can be arranged on the upper shell 120 or the lower bucket 110, and specifically, a part of the manometer extends into the upper part of the internal space of the working tank 100.

[0072] In one embodiment, the lower bucket 110 and the float bucket 210 have a guide structure in the height direction.

[0073] In this embodiment, through the arrangement of the guide structure, the movement of the float bucket 210 is standardized, and the working quality of the first sealing plug 320 and the second sealing plug 420 is higher, and the sealing effect is better.

[0074] In one embodiment, the first lever 300 is adjustable in the height direction of the connecting piece 220, and the second lever 400 is adjustable in the height direction of the connecting piece 220.

[0075] In this embodiment, through the adjustable arrangement of the fixed height, the adjustable degree is improved in the coordination process of steam entering and discharging. To some extent, the capacity of each time condensate water entering and discharging can be controlled.

[0076] In one embodiment, the end of the water outlet pipe 600 in the float bucket 210 is made of rubber.

[0077] In the embodiment, the end of the outlet pipe 600 is made of rubber, so that when the floating bucket 200 floats up and down, the rigid collision between the outlet pipe 600 and the floating bucket 200 is reduced, and the damage is reduced. The material of the end of the outlet pipe 600 can be polyurethane or other high-temperature-resistant and aging-resistant materials.

[0078] In one embodiment, the buoyant member is arranged at the middle position of the connecting member 220 in the height direction.

[0079] In the embodiment, the working state of the floating bucket 210 can be adjusted by arranging the buoyant member.

[0080] In one embodiment, the connecting member 220 is in the shape of a rod and is connected to the center position of the bottom of the floating bucket 210.

[0081] In the embodiment, the lower end of the connecting member 220 is arranged to be lower, so that the connecting member 220 is more smooth during the driving of the floating bucket 210.

[0082] The application also provides a control method applied to the high-low pressure steam condensate water system and the grid-connected pump, which comprises the following steps:

[0083] S1, obtaining the air pressure signal sent by the barometer;

[0084] S2, if the periodicity of the air pressure signal disappears and is consistent with the atmospheric pressure, an alarm is given that the position of the inlet pipe 500 works abnormally;

[0085] S3, if the periodicity of the air pressure signal disappears and continuously rises and exceeds the first preset pressure, an alarm is given that the outlet pipe 600 works abnormally;

[0086] S4, if the air pressure signal is in a periodic form but the period changes, an alarm is given that the position of the inlet pipe 500 works abnormally;

[0087] S5, if the air pressure signal is in a periodic form and the period does not change but the maximum value rises, an alarm is given that the temperature of the condensate water in the outlet pipe 600 is too high;

[0088] S6, if the air pressure signal is in a periodic form and the period does not change but the minimum value decreases, an alarm is given that the temperature of the condensate water in the outlet pipe 600 is too low.

[0089] In the embodiment, in the step S1, the air pressure signal sent by the barometer is continuously obtained. Under normal circumstances, the air pressure signal obtained by the barometer is periodically cyclic, and fluctuates between the maximum value and the minimum value. When all factors are consistent, the period is consistent.

[0090] In the step of S2, if the periodicity of the air pressure signal disappears and the air pressure signal is consistent with the atmospheric pressure, it gives a warning that the position of the water inlet pipe 500 is abnormal. The specific reason is that there is no condensate water injection, so that the bucket part 200 cannot sink.

[0091] In the step of S3, if the periodicity of the air pressure signal disappears and the air pressure signal is continuously rising and exceeds the first preset pressure, it gives a warning that the water outlet pipe 600 is abnormal. The specific reason is that the bucket part 200 cannot float, so it is judged that the water outlet pipe 600 is problematic, and the condensate water in the bucket part 200 cannot be discharged.

[0092] In the step of S4, if the air pressure signal is in a periodic form but the period changes, it gives a warning that the position of the water inlet pipe 500 is abnormal. The specific reason is that the period of the floating and sinking of the bucket part 200 is related to the inflow speed of the condensate water in the water inlet pipe 500, and when the period changes, it reflects that the position of the water inlet pipe 500 is abnormal.

[0093] In the step of S5, if the air pressure signal is in a periodic form and the period does not change but the maximum value rises, it gives a warning that the temperature of the condensate water in the water outlet pipe 600 is too high. The interval between the floating and sinking of the bucket part 200 is only related to the rate of inflowing condensate water, and if the period does not change but the maximum value exceeds the original maximum value, it represents that the temperature of the condensate water in the lower bucket 110 rises, and the working gas in the connection joint 700 is excessively heated, so that the maximum value of the air pressure signal rises.

[0094] In the step of S6, if the air pressure signal is in a periodic form and the period does not change but the minimum value decreases, which is opposite to step S5, it gives a warning that the temperature of the condensate water in the water outlet pipe 600 is too low.

[0095] In an embodiment, the step of S4 further comprises:

[0096] According to the direction of the period deviation, the driving motor controls the inner threaded sleeve 124 to rotate forward or reverse.

[0097] As described in the foregoing embodiments, for the case of needing to control the residence time of the condensate water, the operation of the bucket part 200 needs to be controlled. When the helical spring 222 provides a downward force to the baffle 221, the condensate water enters from the water inlet pipe 500 and flows out through the water outlet pipe 600 relatively quickly; on the contrary, when the helical spring 222 provides an upward force to the baffle 221, the condensate water enters from the water inlet pipe 500 and flows out through the water outlet pipe 600 relatively slowly. The specific cooperation relationship between the driving motor and the inner threaded sleeve 124 is referred to the foregoing embodiments, which will not be described here.

[0098] In summary, the high-low pressure steam condensate water system grid-connected pump and control method provided by the application, the float bucket part 200 is arranged in the working box 100 and includes a float bucket 210 and a connecting piece 220 connected to the float bucket 210 and extending upward out of the float bucket 210, the first lever 300 and the second lever 400 are automatically driven through the floating of the float bucket 210, and finally the opening and closing of the steam inlet hole 121 and the steam outlet hole 122 are automatically controlled; through the connection of steam, air and other incompressible gases on the inlet joint 700, the power of the entire grid-connected pump is provided under the condition of small energy consumption, the automatic circulation between the inflow process, the pressure increasing process, the discharge process and the pressure equalizing process is realized by the floating and sinking of the float bucket 210; the inflow condensate water is connected to the condensate water pipeline generated by the high-pressure steam system, which saves the pipeline investment, does not need to set up an electric cabinet, does not need to be on duty, does not need a pit, does not need to reduce the condensate water temperature, improves the condensate water recovery amount and temperature, saves energy consumption, is beneficial to environmental protection.

[0099] The above description is only the preferred embodiment of the application, and does not limit the patent scope of the application, and any equivalent structure or equivalent flow transformation obtained by using the content of the specification and the drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the application.

Claims

1. A high-low pressure steam condensate system grid-tied pump, characterized by, The utility model relates to a closed work tank (100) comprising an upper shell (120) and a lower barrel (110) connected to each other, wherein the upper shell (120) is provided with a steam inlet hole (121) and a steam outlet hole (122); a floating barrel part (200) is arranged in the work tank (100) and comprises a floating barrel (210) arranged vertically and a connecting piece (220) connected to the floating barrel (210) and extending upwardly out of the floating barrel (210); a first lever (300) is hingedly connected to the upper end of the connecting piece (220) and connected to a first rod (310) arranged vertically, wherein the free end of the first rod (310) is provided with a first sealing plug (320) arranged above the steam inlet hole (121); a second lever (400) is hingedly connected to the upper end of the connecting piece (220) and connected to a second rod (410) arranged vertically, wherein the free end of the second rod (410) is provided with a second sealing plug (420) arranged below the steam outlet hole (122); a water inlet pipe (500) is arranged in the inner wall of the lower barrel (110) and provided with a water inlet check valve (510) arranged in the direction of water flow; a water outlet pipe (600) is arranged in the work tank (100) from the floating barrel (210) and provided with a water outlet check valve (610) arranged in the direction of water flow; an inlet connector (700) is arranged above the steam inlet hole (121) and connected to the first sealing plug (320) to form a circumferential gap, wherein the first sealing plug (320) blocks the inlet connector (700) when the first lever (300) moves upwardly; the upper surface of the upper shell (120) is provided with an externally threaded column (123), the connecting piece (220) is arranged to slide through the externally threaded column (123), an internally threaded sleeve (124) is arranged corresponding to the externally threaded column (123), the top of the connecting piece (220) is provided with a baffle (221), and a helical spring (222) is arranged between the baffle (221) and the internally threaded sleeve (124) to rotate freely. A driving motor is arranged on the upper shell (120), a controller is arranged corresponding to the driving motor, and the driving motor drives the internally threaded sleeve (124) to rotate when the driving motor works. A gas pressure gauge for measuring the gas pressure in the work tank (100) is arranged on the work tank (100), and the gas pressure gauge is electrically connected to the controller. The position of the first lever (300) in the height direction of the connecting piece (220) is adjustable, and the position of the second lever (400) in the height direction of the connecting piece (220) is adjustable. The end of the water outlet pipe (600) in the floating barrel (210) is made of rubber. A buoyancy piece is arranged at the middle position in the height direction of the connecting piece (220). The connecting piece (220) is in the shape of a rod and connected to the center position of the bottom of the floating barrel (210). The utility model relates to a closed work tank (100) comprising an upper shell (120) and a lower barrel (110) connected to each other, wherein the upper shell (120) is provided with a steam inlet hole (121) and a steam outlet hole (122); a floating barrel part (200) is arranged in the work tank (100) and comprises a floating barrel (210) arranged vertically and a connecting piece (220) connected to the floating barrel (210) and extending upwardly out of the floating barrel (210); a first lever (300) is hingedly connected to the upper end of the connecting piece (220) and connected to a first rod (310) arranged vertically, wherein the free end of the first rod (310) is provided with a first sealing plug (320) arranged above the steam inlet hole (121); a second lever (400) is hingedly connected to the upper end of the connecting piece (220) and connected to a second rod (410) arranged vertically, wherein the free end of the second rod (410) is provided with a second sealing plug (420) arranged below the steam outlet hole (122); a water inlet pipe (500) is arranged in the inner wall of the lower barrel (110) and provided with a water inlet check valve (510) arranged in the direction of water flow; a water outlet pipe (600) is arranged in the work tank (100) from the floating barrel (210) and provided with a water outlet check valve (610) arranged in the direction of water flow; an inlet connector (700) is arranged above the steam inlet hole (121) and connected to the first sealing plug (320) to form a circumferential gap, wherein the first sealing plug (320) blocks the inlet connector (700) when the first lever (300) moves upwardly; the upper surface of the upper shell (120) is provided with an externally threaded column (123), the connecting piece (220) is arranged to slide through the externally threaded column (123), an internally threaded sleeve (124) is arranged corresponding to the externally threaded column (123), the top of the connecting piece (220) is provided with a baffle (221), and a helical spring (222) is arranged between the baffle (221) and the internally threaded sleeve (124) to rotate freely. A driving motor is arranged on the upper shell (120), a controller is arranged corresponding to the driving motor, and the driving motor drives the internally threaded sleeve (124) to rotate when the driving motor works.

2. The high-low pressure steam condensate system grid tied pump of claim 1, wherein, A gas pressure gauge for measuring the gas pressure in the work tank (100) is arranged on the work tank (100), and the gas pressure gauge is electrically connected to the controller.

3. The high-low pressure steam condensate system grid tied pump of claim 2, wherein, The position of the first lever (300) in the height direction of the connecting piece (220) is adjustable, and the position of the second lever (400) in the height direction of the connecting piece (220) is adjustable.

4. The high-low pressure steam condensate system grid tied pump of any one of claims 1 to 3, wherein, The end of the water outlet pipe (600) in the floating barrel (210) is made of rubber.

5. The high-low pressure steam condensate system grid tied pump of any one of claims 1 to 3, wherein, A buoyancy piece is arranged at the middle position in the height direction of the connecting piece (220).

6. The high-low pressure steam condensate system grid tied pump of any one of claims 1 to 3, wherein, The connecting piece (220) is in the shape of a rod and connected to the center position of the bottom of the floating barrel (210).

7. The high-low pressure steam condensate system grid tied pump of any one of claims 1 to 3, wherein, ​ 8. A control method applied to the high-low pressure steam condensate system grid pump of claim 3, characterized in that, ​ S1, obtaining the air pressure signal sent by the air pressure gauge; S2, if the periodicity of the air pressure signal disappears and the pressure is consistent with the atmospheric pressure, an alarm is given that the position of the water inlet pipe (500) is abnormal; S3, if the periodicity of the air pressure signal disappears and the pressure is continuously rising and exceeds the first preset pressure, an alarm is given that the water outlet pipe (600) is abnormal; S4, if the air pressure signal is in a periodic form but the period changes, an alarm is given that the position of the water inlet pipe (500) is abnormal; S5, if the air pressure signal is in a periodic form and the period does not change but the maximum value rises, an alarm is given that the temperature of the condensed water in the water outlet pipe (600) is too high; S6, if the air pressure signal is in a periodic form and the period does not change but the minimum value decreases, an alarm is given that the temperature of the condensed water in the water outlet pipe (600) is too low.

9. The control method according to claim 8, characterized by, The step S4 further comprises: According to the direction of the period deviation, the driving motor is controlled to rotate the internal thread sleeve (124) in a forward direction or a reverse direction.

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