Valve shell assembly of industrial steam turbine

Abstract

The invention belongs to the technical field of steam turbine assemblies, and discloses a valve shell assembly of an industrial steam turbine, which comprises a check valve body, and further comprises an extension shell, a valve rod, a valve rod and a valve rod, the valve plate is rotatably arranged in the extension shell and used for rotating in the direction close to / away from the check valve body so as to close / open the check valve body; the sealing ring is arranged on the inner side of the check valve body, and a sealing ring is arranged on the side, close to the sealing ring, of the valve plate; when the check valve body is closed by the valve plate, the sealing ring on the valve plate abuts against the sealing ring for sealing. And cleaning liquid is contained in the cleaning box. By means of the structural design of the liquid guide channel, the liquid spraying executing mechanism and the cleaning box, in the shutdown state or other cleaning states, the driving motor, the sliding ball and the track groove structure drive the supporting cylinder to rotate in the circumferential direction in a reciprocating mode, cleaning liquid is guided in through the liquid guide channel, and then the liquid spraying plate can be driven to conduct full-coverage flushing on a valve plate and a sealing ring.

Description

Technical Field

[0001] The present invention belongs to the technical field of steam turbine components, and specifically relates to a valve housing assembly for an industrial steam turbine. Background Art

[0002] The valve housing assembly of an industrial steam turbine is a key component for controlling the flow of the medium. The check valve inside it prevents the backflow of steam or high-temperature fluid through the close fit between the valve plate and the sealing ring, ensuring the safe operation of the unit. In actual operation, the valve plate and the sealing ring are in a high-temperature and high-pressure working condition for a long time. Due to the accumulation of particulate impurities and coking substances caused by the extraction medium and high-temperature steam, impurities such as oil dirt and carbon deposits are likely to accumulate on the contact surface, and faults such as jamming, sealing failure, or incomplete closing are likely to occur.

[0003] For the existing maintenance, it is necessary to stop the machine and disassemble the valve body cover, and manually clean the dirt on the surface of the valve plate and the sealing ring. The operation process is cumbersome and the downtime is long, which seriously affects the operation efficiency of the unit and the power supply stability. Moreover, repeated disassembly and assembly are likely to accelerate the aging of the sealing structure and increase the risk of secondary leakage. There is a problem that the maintenance of the sealing surface cannot be completed synchronously within a short downtime window, and there are defects such as low cleaning efficiency and long maintenance cycle. Summary of the Invention

[0004] To solve the problems raised in the above background art, the present invention provides a valve housing assembly for an industrial steam turbine.

[0005] To achieve the above object, the present invention provides the following technical solution: A valve housing assembly for an industrial steam turbine, including a check valve body, and further including: An extension housing, which is hollow inside and is connected to the check valve body at one side; A valve plate, which is rotatably arranged inside the extension housing and is used to rotate in the direction close to / away from the check valve body to close / open the check valve body; A sealing ring, which is arranged inside the check valve body, and a sealing ring is arranged on the side of the valve plate close to the sealing ring; When the valve plate closes the check valve body, the sealing ring on the valve plate abuts against the sealing ring for sealing; A cleaning box, which contains cleaning liquid inside; A liquid spraying and cleaning member, which is arranged inside the extension housing and includes a liquid guiding passage communicating with the cleaning box and a liquid spraying execution mechanism; When cleaning the valve plate, the valve plate is in the state of opening the check valve body, and the liquid guiding passage conveys the cleaning liquid to the liquid spraying execution mechanism, driving it to spray the cleaning liquid to wash the valve plate and the sealing ring.

[0006] In the above technical solution, preferably, the liquid spraying execution mechanism includes: A support cylinder, which is hollow inside and is rotatably arranged inside the extension housing; A liquid spraying plate, which is fixedly arranged and communicated with the support cylinder; The transmission part, whose output end is connected to the support cylinder, is used to drive the support cylinder to rotate circumferentially in a reciprocating manner. The liquid spraying plate rotates forward / backward with the support cylinder to cover the valve plate and the sealing ring; The liquid outlet end of the liquid guiding passage is connected to the support cylinder; The liquid guiding passage transports the cleaning liquid to the support cylinder and the liquid spraying plate to wash the valve plate and the sealing ring.

[0007] In the above technical solution, preferably, the transmission part includes: A reciprocating screw rod, which is arranged through and rotatably on the extension shell; A transmission motor, which is located outside the extension shell and whose output end is connected to the reciprocating screw rod; A moving plate, which is arranged on the reciprocating screw rod in a transmission manner and reciprocates linearly along the straight line in the extension shell as the reciprocating screw rod rotates; A sliding ball, which is arranged on the moving plate; A track groove, which is opened on the support cylinder and is adapted to the sliding ball; The sliding ball reciprocates in the track groove to drive the support cylinder to rotate circumferentially in a reciprocating manner.

[0008] In the above technical solution, preferably, the sealing ring is hollow inside and is open on the side facing the valve plate; The liquid spraying actuator further includes: A rotating sleeve, which is rotatably arranged on the opening side of the sealing ring, and is hollow inside and communicated with the sealing ring; When the sealing ring abuts against the sealing ring, it is located inside the rotating sleeve; A liquid spraying sleeve, which is elastically installed at the communicating part of the rotating sleeve and the sealing ring; Openings adapted to the liquid spraying sleeve are arranged on the inner side of the rotating sleeve; The liquid outlet end of the liquid guiding passage is connected to the inside of the sealing ring; As the liquid guiding passage guides the cleaning liquid in the cleaning tank into the sealing ring, the liquid spraying sleeve is driven by the hydraulic pressure in the sealing ring to displace and extend out of the opening, and the cleaning liquid sprays out of the liquid spraying sleeve to clean the contact part between the sealing ring and the sealing ring.

[0009] In the above technical solution, preferably, the transmission part further includes: A toothed plate, which reciprocates linearly along the straight line in the extension shell as the moving plate; A toothed sleeve, which is fixedly arranged on the rotating sleeve and meshes with the toothed plate; As the toothed plate reciprocates linearly along the straight line, the rotating sleeve is driven by the toothed sleeve to reciprocate circumferentially.

[0010] In the above technical solution, preferably, the liquid spraying sleeve includes a limiting rod disposed inside the rotating sleeve. A cleaning plate whose one end is adapted to the opening is sleeved on the limiting rod. The cleaning plate is hollow inside and is communicated with the inner cavity of the sealing ring. A return spring is disposed between the cleaning plate and the rotating sleeve. The cleaning plate is communicated with a liquid outlet hole.

[0011] In the above technical solution, preferably, it further includes: A return liquid pipe for guiding the liquid after cleaning in the extension shell to the inside of the communicating cleaning box; A filter cartridge disposed at the communicating end of the return liquid pipe and the cleaning box; A sealing cover disposed on the liquid spraying plate; Driving the sealing cover to open / block the communicating part between the return liquid pipe and the extension shell as the liquid spraying plate rotates forward / backward.

[0012] In the above technical solution, preferably, the driving motor is a double-shaft motor, one end of which is connected to the reciprocating screw rod, and the other end is provided with a driving gear; It further includes: A closing plate, one end of which is fixedly connected to the filter cartridge, and the other end penetrates through the cleaning box. The filter cartridge is rotatably connected to the return liquid pipe; A rotating gear disposed outside the penetrating end of the closing plate and meshing with the driving gear; Driving the filter cartridge to rotate and filter the liquid after cleaning as the driving gear drives the rotating gear to rotate circumferentially.

[0013] In the above technical solution, preferably, partition plates are equidistantly disposed inside the filter cartridge. A communicating hole is provided on the cleaning box. A rotating ring is rotatably disposed in the communicating hole. A magnet sheet is provided on the surface of the rotating ring. The magnet sheet is magnetically connected to the closing plate.

[0014] In the above technical solution, preferably, the liquid guiding path includes a three-way pipe. The liquid inlet end of the three-way pipe is communicated with the cleaning box, and the other two liquid outlet ends are communicated with the support cylinder and the sealing ring.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: Through the structural design of the liquid guiding path, the liquid spraying execution mechanism, and the cleaning box, when the machine is stopped or in other cleanable states, the support cylinder is driven to rotate reciprocally circumferentially through the driving motor, the sliding ball, and the track groove structure, and the cleaning liquid is introduced through the liquid guiding path, so as to drive the liquid spraying plate to perform full-coverage flushing on the valve plate and the sealing ring; Meanwhile, the liquid guiding path synchronously conveys the cleaning liquid to the inner cavity of the sealing ring, uses hydraulic pressure to drive the liquid spraying sleeve to elastically extend, flushes the sealing contact surface, and realizes the circumferential reciprocating rotation of the rotating sleeve through the rack and gear sleeve structure, so as to drive the liquid spraying sleeve to perform full-coverage flushing on the sealing contact surface, realizing the integrated cleaning of the valve plate, the sealing ring, and the sealing ring, avoiding the cumbersome process of traditional shutdown disassembly, and shortening the maintenance cycle; Through the integrated design of the plugging cover and the liquid spraying plate, and in cooperation with the use of the liquid return pipe, during the cleaning process, the cleaning liquid can flow back through the liquid return pipe, flow into the cleaning tank after being filtered by the filter cartridge, and after the cleaning is completed, the plugging cover can seal the connection of the liquid return pipe, without the need for an external drive source for the liquid return operation, and a liquid return channel can be formed inside the shell during cleaning and the liquid return channel can be closed after shutdown.

[0016] Moreover, in cooperation with the synchronous drive of the reciprocating screw and the filter cartridge by the dual-axis motor, through the meshing linkage of the transmission gear and the rotating gear, while realizing the reciprocating motion of the liquid spraying actuator, the rotating gear, the closing plate and the filter cartridge are synchronously driven to rotate and centrifugally filter the cleaning waste liquid. The dynamically rotating filter cartridge cooperates with the partition structure, which can enhance the centrifugal separation effect of impurities in the waste liquid during the cleaning process and complete the purification of the waste liquid. Furthermore, the communication hole of the cleaning tank is magnetically connected to the closing plate through a rotating ring with magnet pieces, which can realize the quick disassembly and accurate positioning of the filter cartridge. During maintenance, only the magnetic adsorption needs to be released to conveniently take out the filter cartridge for cleaning or replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a partial sectional structural schematic diagram of the check valve body and the extension shell of the present invention; Figure 3 is a structural schematic diagram of the sealing ring, the cleaning tank, the liquid guiding passage and the liquid spraying plate of the present invention; Figure 4 is a three-dimensional structural schematic diagram of the support cylinder, the moving plate, the sliding ball and the track groove of the present invention; Figure 5 is a three-dimensional structural schematic diagram of the sealing ring, the rotating sleeve and the gear sleeve of the present invention; Figure 6 is a schematic diagram of the abutting state of the valve plate, the sealing ring and the sealing ring of the present invention; Figure 7 is a sectional structural schematic diagram of the sealing ring, the rotating sleeve, the cleaning plate, the return spring and the liquid outlet hole of the present invention; Figure 8 is a sectional structural schematic diagram of the cleaning tank, the filter cartridge, the transmission gear and the closing plate of the present invention; Figure 9 is an exploded view of the filter cartridge, the rotating ring, the magnet piece, the closing plate and the rotating gear of the present invention.

[0018] In the figure: 1, check valve body; 2, extension shell; 3, valve plate; 4, sealing ring; 5, sealing gasket; 6, cleaning box; 7, liquid spraying and cleaning member; 8, liquid guiding passage; 9, liquid spraying actuator; 91, support cylinder; 92, liquid spraying plate; 93, transmission member; 931, reciprocating screw; 932, transmission motor; 933, moving plate; 934, sliding ball; 935, track groove; 936, toothed plate; 937, toothed sleeve; 94, rotating sleeve; 95, liquid spraying sleeve; 951, limiting rod; 952, cleaning plate; 953, return spring; 954, liquid outlet hole; 96, opening; 10, return liquid pipe; 11, filter cartridge; 12, blocking cover; 13, transmission gear; 14, closing plate; 15, rotating gear; 16, partition plate; 17, communication hole; 18, rotating ring; 19, magnet sheet. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] As Figure 1 , Figure 2 , Figure 3 , Figure 6 shown, the present invention provides a valve housing assembly for an industrial steam turbine, including a check valve body 1, and further including: An extension shell 2, which is hollow inside and is connected to the check valve body 1 at one side; A valve plate 3, rotatably arranged in the extension shell 2, and used to rotate along the direction close to / away from the check valve body 1 to close / open the check valve body 1; As Figure 1 and Figure 2 shown, specifically, a valve rod penetrates through the extension shell 2, the valve plate 3 is fixedly arranged on the valve rod, an electric pusher is arranged on the extension shell 2, a sliding rod is arranged at the output end of the electric pusher, a rotating rod is arranged at the end of the valve rod, and a sliding groove is arranged on the rotating rod, and the sliding rod slides in the sliding groove; That is, the electric pusher is used to push the sliding rod to move in the sliding groove, thereby driving the valve rod to rotate, and then driving the valve plate 3 to rotate to close / open the check valve body 1; the above-mentioned transmission part for driving the valve plate 3 to rotate is a prior art, so it is not specifically marked, and this part can also adopt the method of driving the valve rod to rotate by a transmission motor, and the design of the transmission part can be carried out according to actual needs.

[0021] A sealing ring 4 is arranged inside the check valve body 1, and a sealing gasket 5 is arranged on the side of the valve plate 3 close to the sealing ring 4; When the valve plate 3 closes the check valve body 1, the sealing ring 5 on the valve plate 3 abuts against the sealing ring 4 for sealing; A cleaning tank 6, which contains a cleaning liquid inside; A liquid spraying and cleaning member 7, which is arranged in the extension shell 2 and includes a liquid guiding passage 8 communicated with the cleaning tank 6 and a liquid spraying actuator 9; When cleaning the valve plate 3, the valve plate 3 is in the state of opening the check valve body 1. The liquid guiding passage 8 conveys the cleaning liquid to the liquid spraying actuator 9, driving it to spray the cleaning liquid to wash the valve plate 3 and the sealing ring 5.

[0022] Through the built-in liquid spraying and cleaning member 7, the valve plate 3 and the sealing ring 5 can be cleaned when the valve plate 3 is opened during shutdown. It can reduce the failures caused by dirt accumulation (such as failures caused by blockage), reduce the maintenance frequency, maintain the stable performance of the valve. The cleaning operation does not require processes such as opening the valve cover for disassembly, and the operation is carried out without manual participation, shortening the maintenance cycle.

[0023] Such as Figure 3 、 Figure 4 As shown, the liquid spraying actuator 9 includes: A support cylinder 91, which is hollow inside and rotatably arranged in the extension shell 2; A liquid spraying plate 92, which is fixedly arranged and communicated with the support cylinder 91; A transmission member 93, whose output end is connected to the support cylinder 91 and is used to drive the support cylinder 91 to rotate reciprocally in the circumferential direction. The liquid spraying plate 92 rotates forward / backward with the support cylinder 91 to cover the valve plate 3 and the sealing ring 5; Among them, as Figure 2 shown, an arc-shaped sleeve is arranged on the extension shell 2, which can adapt to the rotation path of the liquid spraying plate 92 so that the liquid spraying plate 92 can completely cover the valve plate 3 and the sealing ring 5; Specifically, the initial positions of the support cylinder 91 and the liquid spraying plate 92 are located below the valve plate 3. The reciprocating rotation of the support cylinder 91 and the liquid spraying plate 92 swings reciprocally in the circumferential direction with the axis of the support cylinder 91 as the center, and the one-way swing amplitude is 90° (one-quarter of the circumference). In a complete motion cycle, the angle coverage of 90° in both the positive and negative directions is realized. When the forward rotation of the support cylinder 91 and the liquid spraying plate 92 reaches the position, they are adjacent / parallel to the valve stem, that is, they can completely cover the surfaces of the valve plate 3 and the sealing ring 5, ensuring that there is no dead angle in cleaning and avoiding dirt residue caused by cleaning blind areas.

[0024] The liquid outlet end of the liquid guiding passage 8 is communicated with the support cylinder 91; The liquid guiding passage 8 conveys the cleaning liquid to the support cylinder 91 and the liquid spraying plate 92 to wash the valve plate 3 and the sealing ring 5.

[0025] When the check valve body 1 is in a shutdown state or any other state where cleaning is possible, when the valve plate 3 rotates to open the check valve body 1, the valve plate 3 and the sealing ring 5 actually rotate to the side of the liquid spraying plate 92 away from the check valve body 1, that is, when the liquid spraying plate 92 sprays, it can clean the contact side of the valve plate 3 and the sealing ring 5 with the sealing ring 4; As Figure 1 , Figure 2 , Figure 4 shown, the transmission member 93 includes: A reciprocating screw 931, which is rotatably arranged through the extension shell 2; A transmission motor 932, located outside the extension shell 2 and its output end is connected to the reciprocating screw 931; A moving plate 933, which is transmission arranged on the reciprocating screw 931 and reciprocates linearly along a straight line in the extension shell 2 as the reciprocating screw 931 rotates; A sliding ball 934, which is arranged on the moving plate 933; A track groove 935, which is opened on the support cylinder 91 and is adapted to the sliding ball 934; The sliding ball 934 reciprocates in the track groove 935 to drive the support cylinder 91 to rotate circumferentially reciprocally.

[0026] Specifically, the above transmission components drive the support cylinder 91 and the liquid spraying plate 92 to rotate circumferentially reciprocally, and the cleaning liquid is supplied to the liquid spraying plate 92 through the liquid guiding passage 8 to spray out for a full-coverage cleaning operation on the contact side of the valve plate 3 and the sealing ring 5 with the sealing ring 4; As Figure 3 , Figure 5 , Figure 7 shown, the inside of the sealing ring 4 is hollow and is open towards the valve plate 3 side; The liquid spraying actuator 9 further includes: A rotating sleeve 94, which is rotatably arranged on the open side of the sealing ring 4, and its inside is hollow and communicates with the sealing ring 4; When the sealing ring 5 abuts against the sealing ring 4, it is located inside the rotating sleeve 94; A liquid spraying sleeve 95, which is elastically installed at the communication place between the rotating sleeve 94 and the sealing ring 4 and is installed inside the rotating sleeve 94; Openings 96 adapted to the liquid spraying sleeve 95 are provided on the inner side of the rotating sleeve 94; Among them, the openings 96 are equidistantly arranged on the inner side of the rotating sleeve 94, and the number of the liquid spraying sleeves 95 is the same as the number of the openings.

[0027] The liquid outlet end of the liquid guiding passage 8 is connected to the inside of the sealing ring 4; As the liquid guiding passage 8 guides the cleaning liquid in the cleaning tank 6 into the sealing ring 4, the liquid spraying sleeve 95 is driven by the hydraulic pressure in the sealing ring 4 to displace and extend out of the opening 96, and the cleaning liquid sprays out from the liquid spraying sleeve 95 to clean the contact place between the sealing ring 4 and the sealing ring 5.

[0028] The hydraulic pressure inside the sealing ring 4 is utilized to drive the liquid spraying sleeve 95 to displace and extend within the opening 96, achieving a cleaning effect, and this hydraulic drive can be realized without additional complex power devices.

[0029] Among them, the contact part between the sealing ring 5 and the sealing ring 4 is where dirt and impurities are likely to accumulate. If not cleaned in time, it will lead to leakage problems. Therefore, by spraying the cleaning liquid from the liquid spraying sleeve 95 through the above solution, it can directly act on this part, effectively removing dirt and ensuring the sealing effect.

[0030] Specifically, as Figure 3 shown, the liquid guiding passage 8 includes a liquid pump. The liquid inlet end of the liquid pump is provided with a liquid inlet pipe, and the liquid inlet pipe is connected to the inside of the cleaning tank 6. The liquid outlet end of the liquid pump is provided with a conversion sleeve, and a first liquid outlet pipe and a second liquid outlet pipe are communicated with the conversion sleeve. The first liquid outlet pipe and the second liquid outlet pipe are respectively communicated with the support cylinder 91 and the sealing ring 4; As Figure 4 、 Figure 5 shown, the transmission member 93 further includes: A toothed plate 936 that reciprocates linearly along with the moving plate 933 within the extension shell 2; A toothed sleeve 937 that is fixedly arranged on the rotating sleeve 94 and meshes with the toothed plate 936; As the toothed plate 936 reciprocates linearly, the rotating sleeve 94 is driven by the toothed sleeve 937 to reciprocate circumferentially.

[0031] By driving the rotating sleeve 94 to reciprocate circumferentially by the toothed sleeve 937, the liquid spraying sleeve 95 can be driven to reciprocate and rotate accordingly, so as to achieve the effect of covering the contact part between the sealing ring 4 and the sealing ring 5; This design enables the cleaning liquid sprayed by the liquid spraying sleeve 95 to achieve full coverage cleaning at the contact part between the sealing ring 4 and the sealing ring 5. Regardless of the size and shape of the contact area between the sealing ring 4 and the sealing ring 5, it can ensure that each area can be cleaned, avoiding the occurrence of cleaning dead corners; As Figure 7 shown, the liquid spraying sleeve 95 includes a limiting rod 951 arranged inside the rotating sleeve 94. A cleaning plate 952 whose one end is adapted to the opening 96 is sleeved on the limiting rod 951. The cleaning plate 952 is hollow inside and is communicated with the inner cavity of the sealing ring 4. A return spring 953 is arranged between the cleaning plate 952 and the rotating sleeve 94, and a liquid outlet hole 954 is communicated with the cleaning plate 952.

[0032] The return spring 953 in the liquid spraying sleeve 95 provides elastic buffering for the cleaning plate 952. During the cleaning process, when the cleaning plate 952 encounters a certain resistance, the return spring 953 can play a buffering role, avoiding hard collision between the cleaning plate 952 and the rotating sleeve 94 and causing damage. At the same time, after the cleaning is completed, the return spring 953 can make the cleaning plate 952 return to the initial position, ensuring the normal progress of the next cleaning work.

[0033] As shown in Figure 2 、 Figure 8 , it further includes: A liquid return pipe 10 for guiding the cleaned liquid in the extension shell 2 to the inside of the communication cleaning tank 6; A filter cartridge 11 provided at the communication end of the liquid return pipe 10 and the cleaning tank 6; A plugging cover 12 provided on the liquid spraying plate 92; Driving the plugging cover 12 to open / block the connection between the liquid return pipe 10 and the extension shell 2 as the liquid spraying plate 92 rotates forward / backward.

[0034] Specifically, when the cleaning operation is completed, first, the liquid guiding path 8 stops supplying the cleaning liquid. The cleaning liquid in the extension shell 2 flows out through the liquid return pipe 10, and then the liquid spraying plate 92 drives the plugging cover 12 to block the connection between the liquid return pipe 10 and the extension shell 2, thus completing the entire cleaning operation; The liquid spraying plate 92 drives the plugging cover 12, which can automatically open or block the connection between the liquid return pipe 10 and the extension shell 2, and cooperate with the operation of the liquid guiding path 8 to stop supplying liquid, realizing the automatic control of the cleaning process.

[0035] As shown in Figure 1 、 Figure 8 、 Figure 9 , the driving motor 932 is a double-shaft motor, one end is connected to the reciprocating screw 931, and the other end is provided with a transmission gear 13; It further includes: A closing plate 14, one end is fixedly connected to the filter cartridge 11, the other end penetrates through the cleaning tank 6, and the filter cartridge 11 is rotatably connected to the liquid return pipe 10; A rotating gear 15 is provided outside the penetrating end of the closing plate 14 and meshes with the transmission gear 13; Driving the filter cartridge 11 to rotate circumferentially as the transmission gear 13 drives the rotating gear 15 to rotate and filter the cleaned liquid.

[0036] The driving motor 932 drives the filter cartridge 11 to rotate. Compared with static filtration, it can make the cleaning liquid contact the filter cartridge 11 more fully, improve the filtration efficiency, and help prevent impurities from blocking the filter cartridge during the rotation process, ensuring the continuity and stability of filtration.

[0037] As shown in the figure, partition plates 16 are equidistantly arranged inside the filter cartridge 11. A communication hole 17 is provided on the cleaning tank 6. A rotating ring 18 is rotatably provided in the communication hole 17. A magnet sheet 19 is provided on the surface of the rotating ring 18, and the magnet sheet 19 is magnetically connected to the closing plate 14.

[0038] The filter cartridge 11 is rotatably connected to the liquid return pipe 10, and the closing plate 14 is magnetically connected to the cleaning box 6 via a magnet sheet 19. This design makes the filter cartridge 11 easy to disassemble and install, and facilitates the staff to clean and maintain the filter cartridge 11, thereby reducing the maintenance difficulty and time cost.

[0039] As shown in the figure, the liquid guiding passage 8 includes a three-way pipeline, the liquid inlet end of the three-way pipeline is connected to the cleaning box 6, and the other two liquid outlet ends are connected to the support tube 91 and the sealing ring 4.

[0040] The working principle and use process of the present invention: After the machine is stopped, the electric pusher is started to push the slide rod to move in the slide groove of the rotating rod, driving the valve stem to rotate, so that the valve plate 3 rotates to the position of opening the check valve body 1, and the liquid pump is turned on. The cleaning liquid in the cleaning box 6 flows to the support cylinder 91 and the sealing ring 4 through the three-way pipeline of the liquid guide passage 8; After the cleaning liquid enters the support tube 91, it is sprayed out from the spray plate 92 to flush the valve plate 3 and the sealing ring 5; The cleaning liquid that enters the sealing ring 4 drives the liquid spray sleeve 95 to move out of the opening 96 under the action of hydraulic pressure, and the cleaning liquid is sprayed out from the liquid outlet 954 to clean the contact between the sealing ring 4 and the sealing ring 5; During cleaning, the transmission motor 932 is started, driving the reciprocating screw 931 to rotate, causing the moving plate 933 to slide back and forth linearly, driving the sliding ball 934 to move in the track groove 935, thereby driving the support cylinder 91 and the spray plate 92 to rotate back and forth circumferentially, and the valve plate 3 and the sealing ring 5 can be fully flushed; In addition, the tooth plate 936 moves with the moving plate 933, driving the tooth sleeve 937 and the rotating sleeve 94 to reciprocate in the circumferential direction, so that the spray sleeve 95 cleans the contact between the sealing ring 4 and the sealing ring 5 in all directions; During the rotation of the liquid spray plate 92, the blocking cover 12 will reciprocately open / block the connection between the liquid return pipe 10 and the extension shell 2, and the cleaning waste liquid will flow into the cleaning box 6 through the liquid return pipe 10 and the filter cartridge 11. The transmission motor 932 continues to operate, and the transmission gear 13 at the other output end drives the rotating gear 15 to rotate, so that the filter cartridge 11 rotates, and the cleaning liquid is rotary filtered, that is, the rotary filtering operation is completed; After cleaning is completed, the liquid pump is turned off first, and the cleaning liquid in the extension shell 2 flows back through the liquid return pipe 10. After a period of time, the transmission motor 932 can drive the blocking cover 12 to block the connection between the liquid return pipe 10 and the extension shell 2, and the entire cleaning operation is completed; If the filter cartridge 11 needs to be maintained, the magnetic connection between the magnet sheet 19 and the closing plate 14 is released, and the filter cartridge 11 can be taken out for maintenance.

[0041] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0042] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A valve housing assembly for an industrial steam turbine, including a non-return valve body (1), characterized in that: Further included are: An extension shell (2), which is hollow inside and connected to the check valve body (1) on one side; A valve plate (3), rotatably arranged inside the extension shell (2), and used to rotate along the direction close to / away from the check valve body (1) to close / open the check valve body (1); A sealing ring (4), arranged inside the check valve body (1), and a sealing ring (5) is arranged on the side of the valve plate (3) close to the sealing ring (4); When the valve plate (3) closes the check valve body (1), the sealing ring (5) on the valve plate (3) abuts against the sealing ring (4) for sealing; A cleaning box (6), which contains cleaning liquid inside; A liquid spraying and cleaning part (7), arranged inside the extension shell (2), including a liquid guiding passage (8) communicated with the cleaning box (6) and a liquid spraying actuator (9); When cleaning the valve plate (3), the valve plate (3) is in the state of opening the check valve body (1), and the liquid guiding passage (8) transports the cleaning liquid to the liquid spraying actuator (9), driving it to spray the cleaning liquid to wash the valve plate (3) and the sealing ring (5).

2. The valve housing assembly of an industrial steam turbine according to claim 1, characterized in that: The liquid spraying actuator (9) includes: A support cylinder (91), which is hollow inside and rotatably arranged inside the extension shell (2); A liquid spraying plate (92), fixedly arranged and communicated with the support cylinder (91); A transmission part (93), the output end of which is connected to the support cylinder (91), and is used to drive the support cylinder (91) to rotate circumferentially and reciprocally. The liquid spraying plate (92) rotates forward / backward with the support cylinder (91) to cover the valve plate (3) and the sealing ring (5); The liquid outlet end of the liquid guiding passage (8) is connected to the support cylinder (91); The liquid guiding passage (8) transports the cleaning liquid to the support cylinder (91) and the liquid spraying plate (92) to wash the valve plate (3) and the sealing ring (5).

3. The valve housing assembly of an industrial steam turbine according to claim 2, characterized in that: The transmission part (93) includes: A reciprocating screw (931), penetrating and rotatably arranged on the extension shell (2); A transmission motor (932), located outside the extension shell (2) and the output end of which is connected to the reciprocating screw (931); A moving plate (933), arranged on the reciprocating screw (931) for transmission, and reciprocates linearly along the inside of the extension shell (2) as the reciprocating screw (931) rotates; A sliding ball (934), arranged on the moving plate (933); A track groove (935), opened on the support cylinder (91) and adapted to the sliding ball (934); The sliding ball (934) reciprocates in the track groove (935) to drive the support cylinder (91) to rotate circumferentially and reciprocally.

4. The valve housing assembly of an industrial steam turbine according to claim 3, characterized in that: The sealing ring (4) is hollow inside and has an opening on the side facing the valve plate (3); The liquid spraying actuator (9) further includes: A rotating sleeve (94), rotatably arranged on the opening side of the sealing ring (4), and is hollow inside and communicated with the sealing ring (4); When the sealing ring (5) abuts against the sealing ring (4), it is located inside the rotating sleeve (94); A liquid spraying sleeve (95), elastically installed at the communicating part of the rotating sleeve (94) and the sealing ring (4); An opening (96) adapted to the liquid spraying sleeve (95) is arranged on the inner side of the rotating sleeve (94); The liquid outlet end of the liquid guiding passage (8) is connected to the inside of the sealing ring (4); The cleaning liquid in the cleaning tank (6) is guided through the liquid guiding passage (8) into the sealing ring (4). Driven by the hydraulic pressure in the sealing ring (4), the liquid spraying sleeve (95) is displaced and extended in the opening (96), and the cleaning liquid is sprayed out from the liquid spraying sleeve (95) to clean the contact part between the sealing ring (4) and the sealing ring (5).

5. The valve housing assembly of an industrial steam turbine according to claim 4, characterized in that: The transmission member (93) further includes: A toothed plate (936) that reciprocates linearly along with the moving plate (933) in the extension housing (2); A toothed sleeve (937) fixedly arranged on the rotating sleeve (94) and meshing with the toothed plate (936); As the toothed plate (936) reciprocates linearly, the rotating sleeve (94) is driven by the toothed sleeve (937) to reciprocate circumferentially.

6. The valve housing assembly of an industrial steam turbine according to claim 4, characterized in that: The liquid spraying sleeve (95) includes a limiting rod (951) arranged inside the rotating sleeve (94). A cleaning plate (952) whose one end is adapted to the opening (96) is sleeved on the limiting rod (951). The cleaning plate (952) is hollow inside and is connected to the inner cavity of the sealing ring (4). A return spring (953) is arranged between the cleaning plate (952) and the rotating sleeve (94), and a liquid outlet hole (954) is communicated with the cleaning plate (952).

7. The valve housing assembly of an industrial steam turbine according to any one of claims 3-6, characterized in that: It further includes: A return liquid pipe (10) for guiding the cleaned liquid in the extension housing (2) to the inside of the connected cleaning tank (6); A filter cartridge (11) arranged at the connected end of the return liquid pipe (10) and the cleaning tank (6); A plugging cover (12) arranged on the liquid spraying plate (92); As the liquid spraying plate (92) rotates forward / backward, the plugging cover (12) is driven to open / block the connection between the return liquid pipe (10) and the extension housing (2).

8. The valve housing assembly of an industrial steam turbine according to claim 7, characterized in that: The driving motor (932) is a double-shaft motor, one end of which is connected to the reciprocating screw rod (931), and the other end is provided with a driving gear (13). It further includes: A closing plate (14), one end of which is fixedly connected to the filter cartridge (11), and the other end penetrates through the cleaning tank (6). The filter cartridge (11) is rotatably connected to the return liquid pipe (10); A rotating gear (15) arranged outside the penetrating end of the closing plate (14) and meshing with the driving gear (13); As the driving gear (13) drives the rotating gear (15) to rotate circumferentially, the filter cartridge (11) is driven to rotate to filter the cleaned liquid.

9. The valve housing assembly of an industrial steam turbine according to claim 8, characterized in that: Partition plates (16) are equidistantly arranged inside the filter cartridge (11). A communication hole (17) is arranged on the cleaning tank (6). A rotating ring (18) is rotatably arranged in the communication hole (17). A magnet sheet (19) is arranged on the surface of the rotating ring (18), and the magnet sheet (19) is magnetically connected to the closing plate (14).

10. The valve housing assembly of an industrial steam turbine according to claim 7, characterized in that: The liquid guiding passage (8) includes a tee pipe. The liquid inlet end of the tee pipe is communicated with the cleaning tank (6), and the other two liquid outlet ends are communicated with the support cylinder (91) and the sealing ring (4).

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