Tank-type multi-stage water seal structure

Abstract

The invention relates to a tank type multi-stage water seal structure which comprises a water inlet pipe and multi-stage series water seal cavities surrounding the water inlet pipe, the series stage number is larger than or equal to 2, the lower end of the water inlet pipe is communicated with the first-stage water seal cavity, and the last-stage water seal cavity is communicated with a water outlet connector; water sealing is carried out on the water inlet pipe through the annularly-distributed multi-stage series-connection water sealing cavities, the water sealing cavities are distributed around the water inlet pipe, the technical problems that in the prior art, water sealing is large in occupied area and equipment is heavy are effectively solved, through the series-connection design of the multi-stage water sealing cavities, the water sealing height is effectively reduced, a liquid level meter connector is additionally arranged, observation is convenient, and the service life is prolonged. The operation stability is improved.

Description

Technical Field

[0001] The invention relates to the technical field of steam turbine water seal devices, and in particular to a tank-type multi-stage water seal structure. Background Art

[0002] The water seal is an important part of the steam seal system of the steam turbine. The operation of the steam seal system has a significant impact on the efficiency and power of the steam turbine. In order to reduce air leakage and recover the working fluid, and improve the safety and economy of the unit, many different forms of water seal structures have emerged after years of research and engineering practice by scholars at home and abroad.

[0003] Different types of water seals have their own scope of application and their own advantages and disadvantages, but they generally occupy a large area, are bulky, inconvenient to install, and difficult to operate. The tubular multi-stage water seal has largely solved this series of problems, but there are still problems such as the relatively high height of the water seal pipe, the difficulty in observing the liquid level in the multi-stage water seal, and the unstable water level during operation. In order to solve the above problems, it is necessary to invent a new water seal structure with low cost, easy operation, and small footprint. Summary of the invention

[0004] Based on the above description, the present invention provides a tank-type multi-stage water seal structure to solve the technical problems in the prior art that the water seal occupies a large area, the equipment is bulky, and the installation is inconvenient, and the water seal height of the tube-type multi-stage water seal is high, difficult to observe, and the operation is unstable.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: A tank-type multi-stage water seal structure comprises a water inlet pipe and a multi-stage series-connected water seal chamber surrounding the water inlet pipe, the number of series stages being greater than or equal to 2, the lower end of the water inlet pipe being connected to the first-stage water seal chamber, and the last-stage water seal chamber being connected to the water outlet interface.

[0006] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: The tank-type multi-stage water seal structure provided in the present application performs water sealing on the water inlet pipe through multi-stage series-connected water seal chambers distributed in a ring shape. The water seal chambers are distributed around the water inlet pipe, which effectively solves the technical problems in the prior art that the water seal occupies a large area and the equipment is bulky. Through the series design of the multi-stage water seal chambers, the water seal height is effectively reduced, which is convenient for observation and improves the operation stability.

[0007] Based on the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, it includes a base, an outer tube, a plurality of partitions and a cover plate, the water inlet pipe is vertically installed on the upper end of the base, the outer tube is sleeved on the outside of the water inlet pipe, a cavity is formed between the outer tube and the water inlet pipe, the partitions are radially and evenly distributed in the cavity along the outer circumference of the water inlet pipe, the outer end of the partition is connected to the outer tube to divide the cavity into at least two water seal chambers, the at least two water seal chambers are connected in series to form a multi-stage water seal surrounding the water inlet pipe, the lower end of the water inlet pipe is connected to the first-stage water seal chamber, the outer wall of the first-stage water seal chamber is connected to a filling and drainage pipe and a liquid level gauge interface, the liquid level gauge interface is connected to a liquid level gauge, and the outer wall of the last-stage water seal chamber is connected to a water outlet interface; the cover plate is annular and covers the upper end of the cavity.

[0009] Furthermore, the outer tube is formed by welding a plurality of enclosures in sequence, and the outer side of each water seal chamber corresponds to one enclosure.

[0010] Furthermore, an upper water hole is provided at the upper end of the partition between the first-stage water seal chamber and the last-stage water seal chamber, and an intermediate plate is provided in the middle of each water seal chamber. The intermediate plate is welded to the outer wall of the water inlet pipe and is radially arranged, and a water gap is formed at the lower end of the intermediate plate, and a surrounding plate is provided on both sides of each intermediate plate.

[0011] Furthermore, the inner end of each partition is welded to the outer wall of the water inlet pipe, and the outer end of the partition is welded to two enclosures on both sides.

[0012] Furthermore, the cover plate forms an exhaust interface corresponding to the first-stage water seal chamber.

[0013] Furthermore, the lower end surface of the cover plate is fixed to the upper end surface of the partition plate by welding.

[0014] Furthermore, the liquid level gauge is a magnetic floating liquid level gauge, and the magnetic floating liquid level gauge and the liquid level gauge interface are connected via a vacuum valve.

[0015] Furthermore, the injection and drainage pipe is vertically arranged to the enclosure of the first-stage water seal chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a tank-type multi-stage water seal structure provided by an embodiment of the present invention; Figure 2 for Figure 1 The schematic diagram of the structure from above after removing the water level gauge; Figure 3 for Figure 4 Schematic diagram of the AA section; Figure 4 for Figure 3 Schematic diagram of the cross section in the middle BB direction; Figure 5 for Figure 2 Schematic diagram of longitudinal section; Figure 6 for Figure 3 Schematic diagram of the CC section; Figure 7 for Figure 3 Schematic diagram of the DD section. DETAILED DESCRIPTION

[0017] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0019] It will be appreciated that spatial relationship terms such as "under", "beneath", "below", "under", "above", "above", etc., may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It will be appreciated that, in addition to the orientations shown in the figures, spatial relationship terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as "on" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90° or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0020] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediate element. The "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0021] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0022] As shown in the figure, the present application provides a tank-type multi-stage water seal structure to solve the technical problems in the prior art that the water seal occupies a large area, the equipment is bulky, and the installation is inconvenient, and the water seal height of the tube-type multi-stage water seal is high, difficult to observe, and the operation is unstable.

[0023] Among them, the tank-type multi-stage water seal structure includes a water inlet pipe 10 and a multi-stage series water seal chamber 20 surrounding the water inlet pipe 10, the number of series stages is greater than or equal to 2, the lower end of the water inlet pipe 10 is connected to the first-stage water seal chamber 201, and the last-stage water seal chamber 205 is connected to the water outlet interface 30.

[0024] In the embodiment of the present application, the number of series connection of the water seal chambers can be specifically set according to the water seal requirements. For example, in the embodiment of the present application, the number of series connection of the water seal chambers is five, that is, five water seal chambers connected in series in sequence surround the outer periphery of the water inlet pipe 10.

[0025] The tank-type multi-stage water seal structure includes a base 40, an outer tube 50, five partitions 60 and a cover plate 70, wherein the water inlet pipe 10 is vertically installed on the upper end of the base 40, the outer tube 50 is sleeved on the outside of the water inlet pipe 10, and a cavity is formed between the outer tube 50 and the water inlet pipe 10, and the partitions 60 are radially and evenly distributed in the cavity along the outer periphery of the water inlet pipe 10, and the outer ends of the partitions 60 are connected to the outer tube 50 to divide the cavity into five water seal chambers 20.

[0026] Five water seal chambers 20 are connected in series to form a five-level water seal surrounding the water inlet pipe 10. A notch is set at the lower end of the water inlet pipe 10 to communicate with the first-level water seal chamber 201. The outer wall of the first-level water seal chamber 201 is connected to the injection and discharge pipe 21 and the liquid level gauge interface 22, and the liquid level gauge interface 22 is connected to the liquid level gauge 80. The outer wall of the last-level water seal chamber 205 is connected to the water outlet interface 30; the cover plate 70 is annular and covers the upper end of the cavity.

[0027] Specifically, the outer tube 50 is formed by welding a plurality of enclosures 51 in sequence, and the outer side of each water seal chamber corresponds to one enclosure 51, that is, the outer tube is formed into a tubular shape by welding at least 5 enclosures in sequence; such a welded structure is easy to assemble and can be assembled and put into use at any time as needed.

[0028] In the embodiment of the present application, the series design is as follows: an upper water hole 601 is provided at the upper end of the partition 60 between the first-stage water seal chamber 201 and the last-stage water seal chamber 205, and an intermediate plate 23 is provided in the middle of each of the water seal chambers 20. The intermediate plate 23 is welded to the outer wall of the water inlet pipe 10 and is arranged radially, and a water gap 231 is formed at the lower end of the intermediate plate 23. A surrounding plate 51 is provided on both sides of each of the intermediate plates 21, thereby forming each water seal chamber after the first-stage water seal chamber. Water flows in from the water hole on the partition 60 and flows downward, and then flows upward through the water gap at the lower end of the intermediate plate 23 to the water hole on the front end partition of the next-stage water seal chamber, and circulates in sequence until it flows out of the device, effectively ensuring that the water seal length can be effectively extended while reducing the height of the device.

[0029] In the embodiment of the present application, a water inlet interface 11 is led out laterally from the upper end of the water inlet pipe 10 , and vacuum valves are provided on the water inlet interface and the water outlet interface 30 for controlling the inlet and outlet water flow rates.

[0030] The inner end of each partition 60 is welded to the outer wall of the water inlet pipe 10 , and the outer end of each partition 60 is welded to the two enclosures 51 on both sides.

[0031] Preferably, an exhaust port 701 is formed at a position of the cover plate 70 corresponding to the first-stage water seal chamber.

[0032] The lower end surface of the cover plate 70 and the upper end surface of the partition plate 60 are fixed by welding.

[0033] The liquid level gauge 80 is a magnetic floating liquid level gauge, and the magnetic floating liquid level gauge and the liquid level gauge interface 22 are connected via a vacuum valve.

[0034] Furthermore, the injection and drainage pipe 21 is vertically arranged to the enclosure of the first-stage water seal chamber 201 .

[0035] Preferably, vacuum valves are provided on the exhaust port 701 and the water injection and discharge pipe 21 .

[0036] The tank type water seal structure of the present invention can be fixed on any flat ground on site by means of base anchor bolts, meets the water seal requirements for steam seal heater drain recovery of steam turbine steam seal system, saves space, is easy to operate and adjust, and is perfectly suitable for steam turbine steam seal system.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A tank-type multi-stage water seal structure, characterized in that: It comprises a water inlet pipe and a multi-stage series water seal chamber surrounding the water inlet pipe, the number of series stages is greater than or equal to 2, the lower end of the water inlet pipe is connected to the first stage water seal chamber, and the last stage water seal chamber is connected to the water outlet interface.

2. The tank-type multi-stage water seal structure according to claim 1, characterized in that: It includes a base, an outer tube, a plurality of partitions and a cover plate, the water inlet pipe is vertically installed on the upper end of the base, the outer tube is sleeved on the outside of the water inlet pipe, a cavity is formed between the outer tube and the water inlet pipe, the partitions are radially and evenly distributed in the cavity along the outer circumference of the water inlet pipe, the outer end of the partition is connected to the outer tube to divide the cavity into at least two water seal chambers, the at least two water seal chambers are connected in series to form a multi-stage water seal surrounding the water inlet pipe, the lower end of the water inlet pipe is communicated with the first-stage water seal chamber, the outer wall of the first-stage water seal chamber is connected with a filling and drainage pipe and a liquid level gauge interface, the liquid level gauge interface is connected with a liquid level gauge, and the outer wall of the last-stage water seal chamber is connected with a water outlet interface; the cover plate is annular and covers the upper end of the cavity.

3. The tank-type multi-stage water seal structure according to claim 2, characterized in that: The outer tube is formed by welding a plurality of enclosures in sequence, and the outer side of each water seal chamber corresponds to at least one enclosure.

4. The tank-type multi-stage water seal structure according to claim 3, characterized in that: An upper water hole is arranged at the upper end of the partition between the first-stage water seal chamber and the last-stage water seal chamber, and an intermediate plate is arranged in the middle of each water seal chamber. The intermediate plate is welded to the outer wall of the water inlet pipe and arranged radially, and a water gap is formed at the lower end of the intermediate plate, and a surrounding plate is arranged on both sides of each intermediate plate.

5. The tank-type multi-stage water seal structure according to claim 3, characterized in that: The inner end of each partition is welded to the outer wall of the water inlet pipe, and the outer end of the partition is welded to two enclosures on both sides.

6. The tank-type multi-stage water seal structure according to claim 3, characterized in that: The cover plate forms an exhaust interface corresponding to the first-stage water seal chamber.

7. The tank-type multi-stage water seal structure according to claim 3, characterized in that: The lower end surface of the cover plate is fixed to the upper end surface of the partition plate by welding.

8. The tank-type multi-stage water seal structure according to claim 3, characterized in that: The liquid level gauge is a magnetic floating liquid level gauge, and the magnetic floating liquid level gauge and the liquid level gauge interface are connected via a vacuum valve.

9. The tank-type multi-stage water seal structure according to claim 3, characterized in that: The injection and drainage pipe is vertically arranged with respect to the enclosure plate of the first-stage water seal chamber.

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