Temperature measuring device of energy-saving type steam extraction back pressure type steam turbine unit

Abstract

The utility model discloses a temperature measuring device of an energy-saving type steam extraction back pressure type steam turbine set, which relates to the technical field of back pressure type steam turbine sets and comprises a base, a front shaft seat, a steam turbine, a rear shaft seat and a converter, and the front shaft seat, the steam turbine, the rear shaft seat and the converter are arranged on the top of the base. A temperature measuring device is arranged at the top of the steam turbine and used for conveniently replacing a temperature sensor. According to the replacement unit, a user pulls a pull column, the pull column slides in an arc groove in the top of a fixing frame, a pawl is driven to rotate, meshing of the pawl and a ratchet wheel is relieved, at the moment, a rotary knob rotary column is rotated, the rotary knob rotary column drives a rotary disc to rotate, a sliding column slides in inclined grooves, and the two inclined grooves can be driven by position changes of the inclined grooves to move oppositely; and the two inserting rods are pulled out of the rectangular holes, so that the fixing frame and the temperature sensor are pulled out, and the temperature sensor is convenient to replace.

Description

Technical Field

[0001] The utility model relates to the technical field of back-pressure steam turbine units, and particularly relates to a temperature measuring device for an energy-saving extraction back-pressure steam turbine unit. Background Technique

[0002] The working principle of an energy-saving extraction back-pressure steam turbine is to use high-temperature and high-pressure steam to drive the rotor in the bearing to rotate, thereby generating mechanical energy. After the steam passes through the nozzle, its speed increases, pressure decreases, and temperature decreases, forming a high-speed steam flow, which then drives the blades to rotate, converting the kinetic energy of the steam into mechanical energy. At the same time, this unit can recover the waste heat and moisture in the steam, reduce emissions, and achieve the purpose of energy conservation and emission reduction.

[0003] It is found that the publication number is CN209802520U, which discloses a temperature measuring device for the steam temperature after the regulating stage of a steam turbine. This utility model solves the problems that the existing temperature measuring device for the steam temperature after the regulating stage has a large error, and the gas between the inner and outer high-pressure cylinders is likely to enter the temperature measuring protection device. The lower part of the inner cylinder protection sleeve is fixedly connected to the high-pressure and middle-pressure inner cylinder of the steam turbine. A central groove is provided at the lower end of the inner cylinder protection sleeve. Outer sealing laminations and inner sealing laminations are alternately arranged in the groove of the inner cylinder protection sleeve. A pressing ring is fixedly installed on the lower end surface of the inner cylinder protection sleeve. The upper part of the outer cylinder protection sleeve passes through the pressing ring and the sealing laminations in sequence and is assembled in the groove of the inner cylinder protection sleeve. The upper part of the outer cylinder protection sleeve and the lower part of the inner cylinder protection sleeve are sealed and communicated through the outer sealing laminations and the inner sealing laminations. A thermocouple is installed at the lower end of the outer cylinder protection sleeve.

[0004] This utility model is used for measuring the steam temperature after the regulating stage of a steam turbine.

[0005] Based on the above prior art, the existing temperature measuring devices for energy-saving extraction back-pressure steam turbine units still have the following problems. The temperature measuring sensors of the existing temperature measuring devices for energy-saving extraction back-pressure steam turbine units are usually fixedly installed on the steam turbine, and the sensors are likely to be damaged when in contact with steam for a long time. It is too difficult to replace the sensors of the existing temperature measuring devices for energy-saving extraction back-pressure steam turbine units. Therefore, this utility model provides a temperature measuring device for an energy-saving extraction back-pressure steam turbine unit. Content of the Utility Model

[0006] Aiming at the deficiencies of the prior art, this utility model provides a temperature measuring device for an energy-saving extraction back-pressure steam turbine unit, which solves the following problems of the existing temperature measuring device for an energy-saving extraction back-pressure steam turbine unit. The temperature measuring sensors of the existing temperature measuring device for an energy-saving extraction back-pressure steam turbine unit are usually fixedly installed on the steam turbine, and the sensors are likely to be damaged when in contact with steam for a long time. It is too difficult to replace the sensors of the existing temperature measuring device for an energy-saving extraction back-pressure steam turbine unit.

[0007] To achieve the above object, the utility model is realized by the following technical solutions: A temperature measuring device for an energy-saving extraction condensing steam turbine unit, including a base, a front shaft seat is arranged on the top of the base, a steam turbine is arranged on the top of the base, a rear shaft seat is arranged on the top of the base, a converter is arranged on the top of the base, and the front shaft seat, the steam turbine, the rear shaft seat and the converter are connected through a rotating shaft in a penetrating manner. A temperature measuring device is arranged on the top of the steam turbine for facilitating the replacement of the temperature sensor. The temperature measuring device includes:

[0008] A separation unit, arranged above the steam turbine, includes a fixed seat and a top seat;

[0009] A replacement unit, arranged inside the top seat, includes a fixed frame inserted and installed inside the top seat. A knob rotating column is rotatably installed through the top of the fixed frame. A turntable is fixedly installed at the bottom end of the knob rotating column. An inclined groove is formed inside the turntable. A sliding column is slidably installed inside the inclined groove. A plug rod is fixedly installed at the bottom end of the sliding column. A positioning plate is fixedly installed at the bottom of the top box of the fixed frame. The plug rod is slidably installed inside the inner channel of the positioning plate.

[0010] Preferably, a return plate is fixedly installed inside the top seat. A pressing plate is fixedly installed at the bottom end of the column of the fixed frame. A return sealing gasket is installed between the return plate and the pressing plate. A temperature sensor is fixedly installed above the top seat. The detection end of the temperature sensor penetrates through the pressing plate and the fixed seat and is inserted into the steam turbine. A limiting unit is arranged inside the top box of the fixed frame.

[0011] Preferably, rectangular holes are formed on both the left and right sides inside the top seat. The end of the plug rod is inserted into the rectangular hole, and the end of the plug rod is a bevel.

[0012] Preferably, the limiting unit includes a ratchet fixedly installed on the outside of the knob rotating column. A positioning column is fixedly installed on the top of the fixed frame. A pawl is rotatably installed on the outside of the positioning column. The end of the pawl is engaged with the ratchet. A pulling column is fixedly installed at the top of the pawl. The pulling column penetrates through the top of the fixed frame and slides inside the top chute thereof. A mounting seat is fixedly installed on the top of the fixed frame. A spring is fixedly installed between the mounting seat and the pawl.

[0013] Preferably, connection ears are fixedly installed on both the left and right sides of the fixed seat. A clamping groove is formed inside the connection ears. Fixed ears are fixedly installed on both the left and right sides of the top seat. A linkage column is slidably installed through the inside of the fixed ears. A clamping block is fixedly installed at the bottom end of the linkage column. A cam handle is rotatably installed inside the top end of the linkage column. The linkage column and the clamping block are of matching specifications and dimensions.

[0014] Preferably, a plurality of jacks are formed in the top of the fixed seat, and a plurality of insertion posts are fixedly installed at the bottom of the top seat. The specifications and dimensions of the insertion posts and the jacks are adapted to each other. The insertion posts are slidably inserted into the jacks, and a perforated gasket is installed between the top seat and the fixed seat.

[0015] The utility model provides a temperature measuring device for an energy-saving extraction back-pressure steam turbine unit. Compared with the prior art, the following beneficial effects are achieved:

[0016] (1). For the temperature measuring device of the energy-saving extraction back-pressure steam turbine unit, the user pulls the pull column to make the pull column slide in the arc groove on the top of the fixing frame, drives the ratchet pawl to rotate, and releases the engagement between the ratchet pawl and the ratchet wheel. At this time, the knob rotating column is rotated, the knob rotating column drives the turntable to rotate, the sliding column slides in the inclined groove, and the position change of the inclined groove will drive the two inclined grooves to move towards each other, so that the two insertion rods are pulled out of the rectangular hole, thereby pulling out the fixing frame and the temperature sensor, which is convenient for replacing the temperature sensor.

[0017] (2). For the temperature measuring device of the energy-saving extraction back-pressure steam turbine unit, the user pushes the cam handle to rotate, so that the cam handle is disengaged from the fixed ear. At this time, the linkage column and the clamping block are rotated through the fixed seat, so that the clamping block overlaps with the clamping groove, so that the top seat and the fixed seat are separated, so as to clean the hole position in the middle of the cam handle, thereby avoiding a large amount of steam and tiny particles depositing at the hole position during the operation of the steam turbine, which affects the accuracy and stability of the temperature measuring device. Description of the Drawings

[0018] Figure 1 is the right-side perspective structure diagram of the utility model;

[0019] Figure 2 is the right-side perspective structure diagram of the temperature measuring device of the utility model;

[0020] Figure 3 is the disassembled perspective structure diagram of the temperature measuring device of the utility model;

[0021] Figure 4 is the right-side perspective sectional structure diagram of the temperature measuring device of the utility model;

[0022] Figure 5 is the partial perspective structure diagram of the utility model

[0023] Figure 6 is the left-side perspective sectional structure diagram of the temperature measuring device of the utility model.

[0024] In the figure: 1 - base, 2 - front axle seat, 3 - steam turbine, 5 - rear axle seat, 6 - converter, 7 - temperature measuring device, 71 - separation unit, 711 - fixed seat, 712 - top seat, 713 - jack, 714 - plug post, 715 - perforated gasket, 716 - connecting ear, 717 - card slot, 718 - fixed ear, 719 - linkage column, 7110 - chuck, 7111 - cam handle, 72 - replacement unit, 721 - return plate, 722 - fixing bracket, 723 - pressing plate, 724 - return gasket, 725 - knob rotating column, 726 - turntable, 727 - inclined slot, 728 - sliding column, 729 - insertion rod, 7210 - positioning plate, 7211 - rectangular hole, 7212 - temperature sensor, 8 - limit unit, 81 - ratchet wheel, 82 - positioning column, 83 - pawl, 84 - mounting seat, 85 - spring, 86 - pull column. Specific embodiments

[0025] 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] Please refer to Figures 1 - 6 , the present invention provides a technical solution:

[0027] A temperature measuring device for an energy-saving extraction back-pressure steam turbine unit includes a base 1. A front axle seat 2 is arranged on the top of the base 1, a steam turbine 3 is arranged on the top of the base 1, a rear axle seat 5 is arranged on the top of the base 1, a converter 6 is arranged on the top of the base 1, and the front axle seat 2, the steam turbine 3, the rear axle seat 5 and the converter 6 are connected through a rotating shaft in a penetrating manner. A temperature measuring device 7 is arranged on the top of the steam turbine 3 for facilitating the replacement of the temperature sensor. The temperature measuring device 7 includes:

[0028] A separation unit 71, arranged above the steam turbine 3, includes a fixed seat 711 and a top seat 712;

[0029] A replacement unit 72, arranged inside the top seat 712, includes a fixing bracket 722 inserted and installed inside the top seat 712. A knob rotating column 725 is rotatably installed through the top of the fixing bracket 722. A turntable 726 is fixedly installed at the bottom end of the knob rotating column 725. An inclined slot 727 is formed inside the turntable 726. A sliding column 728 is slidably installed inside the inclined slot 727. An insertion rod 729 is fixedly installed at the bottom end of the sliding column 728. A positioning plate 7210 is fixedly installed at the top and bottom of the top box of the fixing bracket 722, and the insertion rod 729 is slidably installed inside the inner channel of the positioning plate 7210.

[0030] The user pulls the pull rod 86, causing the pull rod 86 to slide inside the arc groove at the top of the fixed frame 722, driving the ratchet pawl 83 to rotate, and releasing the engagement between the ratchet pawl 83 and the ratchet wheel 81. At this time, the knob rotating column 725 is rotated, and the knob rotating column 725 drives the turntable 726 to rotate. The sliding column 728 slides inside the inclined groove 727. The position change of the inclined groove 727 will drive the two inclined grooves 727 to move towards each other, pulling out the two insertion rods 729 from the inside of the rectangular hole 7211, thereby pulling out the fixed frame 722 and the temperature sensor 7212, facilitating the replacement of the temperature sensor.

[0031] In this embodiment, a return plate 721 is fixedly installed inside the top seat 712. A pressing plate 723 is fixedly installed at the bottom end of the column of the fixed frame 722. A return sealing gasket 724 is installed between the return plate 721 and the pressing plate 723. A temperature sensor 7212 is fixedly installed above the top seat 712. The detection end of the temperature sensor 7212 penetrates through the pressing plate 723 and is inserted into the steam turbine 3 through the fixed seat 711. A limiting unit 8 is arranged inside the top box of the fixed frame 722.

[0032] A return sealing gasket 724 is installed between the return plate 721 and the pressing plate 723, thereby preventing the water vapor inside the steam turbine 3 from entering the inside of the top seat 712.

[0033] In this embodiment, rectangular holes 7211 are respectively formed on the left and right sides inside the top seat 712. The end of the insertion rod 729 is inserted into the inside of the rectangular hole 7211, and the end of the insertion rod 729 is beveled.

[0034] When the end of the insertion rod 729 is inserted into the inside of the rectangular hole 7211, the rectangular hole 7211 descends by contacting the bevel surface of the insertion rod 729. The rectangular hole 7211 drives the fixed frame 722 to descend synchronously. The fixed frame 722 drives the pressing plate 723 to press the return sealing gasket 724, thereby increasing the sealing performance between the pressing plate 723 and the return plate 721.

[0035] In this embodiment, the limiting unit 8 includes a ratchet wheel 81 fixedly installed outside the knob rotating column 725. A positioning column 82 is fixedly installed at the top of the fixed frame 722. A ratchet pawl 83 is rotatably installed outside the positioning column 82. The end of the ratchet pawl 83 is engaged with the ratchet wheel 81. A pull rod 86 is fixedly installed at the top of the ratchet pawl 83. The pull rod 86 penetrates through the top of the fixed frame 722 and slides inside the top chute thereof. An installation seat 84 is fixedly installed at the top of the fixed frame 722. A spring 85 is fixedly installed between the installation seat 84 and the ratchet pawl 83.

[0036] When the positioning post 82 rotates clockwise, the outer teeth of the ratchet wheel 81 push the pawl 83 to rotate. The pawl 83 squeezes the spring 85. When the ratchet wheel 81 stops rotating, the spring 85 pushes the pawl 83 to rotate through its own elastic force, so that the pawl 83 meshes with the ratchet wheel 81, fixing the position of the ratchet wheel 81 and preventing the ratchet wheel 81 from rotating back.

[0037] In this embodiment, connecting ears 716 are fixedly installed on both the left and right sides of the fixed seat 711, and a clamping groove 717 is formed inside the connecting ear 716. Fixed ears 718 are fixedly installed on both the left and right sides of the top seat 712. A linkage column 719 is slidably installed through the inside of the fixed ear 718. A clamping block 7110 is fixedly installed at the bottom end of the linkage column 719. A cam handle 7111 is rotatably installed inside the top end of the linkage column 719. The specifications and dimensions of the linkage column 719 and the clamping block 7110 are adapted to each other.

[0038] The user pushes the cam handle 7111 to rotate, so that the cam handle 7111 is disengaged from the fixed ear 718. At this time, the linkage column 719 and the clamping block 7110 are rotated through the fixed seat 711, so that the clamping block 7110 overlaps with the clamping groove 717, so that the top seat 712 is separated from the fixed seat 711, so as to clean the hole position in the middle of the cam handle 7111, and thus avoid a large amount of steam and tiny particulate matter depositing at the hole position during the operation of the steam turbine 3, which affects the accuracy and stability of the temperature measuring device.

[0039] In this embodiment, a plurality of jacks 713 are formed at the top of the fixed seat 711. A plurality of plug posts 714 are fixedly installed at the bottom of the top seat 712. The specifications and dimensions of the plug posts 714 and the jacks 713 are adapted to each other. The plug posts 714 are slidably inserted into the inside of the jacks 713. A perforated gasket 715 is installed between the top seat 712 and the fixed seat 711.

[0040] A perforated gasket 715 is installed between the top seat 712 and the fixed seat 711, so as to prevent the water vapor inside the steam turbine 3 from leaking out.

[0041] At the same time, the content not described in detail in this specification belongs to the prior art well known to those skilled in the art.

[0042] During operation, first, the user rotates the linkage column 719 and the clamping block 7110 through the fixed seat 711 so that the clamping block 7110 coincides with the position of the clamping groove 717. At this time, the top seat 712 is inserted into the inside of the jack 713 through the insertion column 714 to be connected to the fixed seat 711. At the same time, the clamping block 7110 passes through the clamping groove 717. Then, rotate the cam handle 7111 so that the clamping blocks 7110 cross each other at the position of 710. Pull the cam handle 7111, and the cam of the fixed seat 711 presses the fixed ear 718, causing the linkage column 719 and the clamping block 7110 to rise. The clamping block 7110 presses the connecting ear 716, so that the top seat 712 and the fixed seat 711 are fixed. When replacing the sensor, the user pulls the pull column 86, so that the pull column 86 slides inside the arc groove at the top of the fixed frame 722, driving the pawl 83 to rotate and releasing the engagement between the pawl 83 and the ratchet 81. At this time, rotate the knob rotating column 725, and the knob rotating column 725 drives the turntable 726 to rotate. The sliding column 728 slides inside the inclined groove 727. The position change of the inclined groove 727 will drive the two inclined grooves 727 to move towards each other, pulling out the two insertion rods 729 from the inside of the rectangular hole 7211, thereby pulling out the fixed frame 722 and the temperature sensor 7212 to replace the temperature sensor.

[0043] 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 term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0044] 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 principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A temperature measuring device for an energy-saving extraction condensing steam turbine unit, comprising a base (1), a front axle seat (2) is arranged at the top of the base (1), a steam turbine (3) is arranged at the top of the base (1), a rear axle seat (5) is arranged at the top of the base (1), a converter (6) is arranged at the top of the base (1), and the front axle seat (2), the steam turbine (3), the rear axle seat (5) and the converter (6) are connected through a rotating shaft running through them, and it is characterized in that: A temperature measuring device (7) is provided at the top of the steam turbine (3) for facilitating the replacement of the temperature sensor. The temperature measuring device (7) includes: A separation unit (71), arranged above the steam turbine (3), includes a fixed seat (711) and a top seat (712); A replacement unit (72), arranged inside the top seat (712), includes a fixing frame (722) inserted and installed inside the top seat (712). A knob rotating column (725) is rotatably installed through the top of the fixing frame (722). A turntable (726) is fixedly installed at the bottom end of the knob rotating column (725). An inclined slot (727) is formed inside the turntable (726). A sliding column (728) is slidably installed inside the inclined slot (727). A plug rod (729) is fixedly installed at the bottom end of the sliding column (728). A positioning plate (7210) is fixedly installed at the bottom of the top box of the fixing frame (722). The plug rod (729) is slidably installed inside the internal passage of the positioning plate (7210).

2. The temperature measuring device of an energy-saving extraction backpressure steam turbine unit according to claim 1, characterized in that: A return-shaped plate (721) is fixedly installed inside the top seat (712). A pressing plate (723) is fixedly installed at the bottom end of the upright column of the fixing frame (722). A return-shaped gasket (724) is installed between the return-shaped plate (721) and the pressing plate (723). A temperature sensor (7212) is fixedly installed above the top seat (712). The detection end of the temperature sensor (7212) penetrates through the pressing plate (723) and is inserted into the steam turbine (3) through the fixed seat (711). A limiting unit (8) is arranged inside the top box of the fixing frame (722).

3. The temperature measuring device of an energy-saving extraction condensing steam turbine unit according to claim 1, characterized in that: Rectangular holes (7211) are formed on both the left and right sides inside the top seat (712). The end of the plug rod (729) is inserted into the rectangular holes (7211). The end of the plug rod (729) is beveled.

4. The temperature measuring device of an energy-saving extraction back-pressure steam turbine unit according to claim 2, characterized in that: The limiting unit (8) includes a ratchet wheel (81) fixedly installed outside the knob rotating column (725). A positioning column (82) is fixedly installed at the top of the fixing frame (722). A pawl (83) is rotatably installed outside the positioning column (82). The end of the pawl (83) meshes with the ratchet wheel (81). A pulling column (86) is fixedly installed at the top of the pawl (83). The pulling column (86) penetrates through the top of the fixing frame (722) and slides inside the top chute thereof. A mounting seat (84) is fixedly installed at the top of the fixing frame (722). A spring (85) is fixedly installed between the mounting seat (84) and the pawl (83).

5. The temperature measuring device of an energy-saving extraction back-pressure steam turbine unit according to claim 1, characterized in that: Connection ears (716) are fixedly installed on both the left and right sides of the fixed seat (711). A clamping groove (717) is formed inside the connection ears (716). Fixed ears (718) are fixedly installed on both the left and right sides of the top seat (712). A linkage column (719) is slidably installed through the fixed ears (718). A clamping block (7110) is fixedly installed at the bottom end of the linkage column (719). A cam handle (7111) is rotatably installed inside the top end of the linkage column (719). The linkage column (719) and the clamping block (7110) are of matching specifications and dimensions.

6. The temperature measuring device of an energy-saving extraction back-pressure steam turbine unit according to claim 1, characterized in that: A plurality of jacks (713) are formed at the top of the fixed seat (711). A plurality of insertion posts (714) are fixedly installed at the bottom of the top seat (712). The specifications and dimensions of the insertion posts (714) are adapted to those of the jacks (713). The insertion posts (714) are slidably inserted into the jacks (713). A perforated gasket (715) is installed between the top seat (712) and the fixed seat (711).

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