High-sealing rear cylinder applied to steam turbine
The high-sealing rear cylinder in steam turbines addresses joint deformation issues by using a fixing rod and pressure alarm system to detect and alert on gaps, enhancing safety through timely warnings.
Patent Information
- Application Number
- CN202420230368.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-30
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-01-30
AI Technical Summary
High-sealed rear cylinders in steam turbines suffer from joint deformation and gaps due to high temperature and pressure, leading to air leakage and lack of early warning mechanisms.
A high-sealing rear cylinder design with a fixing rod, pressure alarm components, and elastic stretching and top parts that detect deformation and trigger an alarm when gaps form, ensuring timely early warnings.
The design provides accurate early warnings of gap formation, preventing potential safety hazards by detecting pressure changes and sounding an alarm promptly.
Smart Images
Figure CN222208034U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cylinders for steam turbines, in particular to a high-sealing rear cylinder used for steam turbines. Background Art
[0002] Steam turbines use fuel combustion to generate high-temperature and high-pressure gas. Through a series of processes such as intake, compression, combustion, and expansion, the rotor on the drive shaft rotates, thereby generating mechanical work. Steam turbines are widely used in power plants, petrochemicals, oil refining, steel, fertilizers, refrigeration and other industrial fields. High-sealed rear cylinders are an important component used in steam turbines. High-sealed rear cylinders can effectively reduce heat loss inside the steam turbine, avoid thermal energy leakage, and improve the thermal efficiency of the steam turbine.
[0003] Due to the high temperature and high pressure working environment, the joints of the cylinders are prone to deformation and gaps during long-term operation, resulting in uneven gaps and air leakage, and it is impossible to issue an early warning when gaps appear at the joints.
[0004] In order to solve the above problems, the present application proposes a high-sealing rear cylinder for use in a steam turbine. Utility Model Content
[0005] Based on the technical problems existing in the background technology, the utility model proposes a high-sealing rear cylinder applied to a steam turbine.
[0006] The utility model provides a high-sealing rear cylinder for a steam turbine, comprising a cylinder body and a connecting pipe connected to the cylinder body;
[0007] A fixing rod parallel to the connecting pipe is installed on the cylinder body, and pressure alarm components are mounted on both ends of the fixing rod. An elastic stretching component located between the two pressure alarm components is sleeved on the fixing rod, and elastic top components are installed on both sides of the elastic stretching component. The two elastic top components are respectively arranged toward the two pressure alarm components.
[0008] Preferably, the pressure alarm component includes a pressure plate, and the two pressure plates are fixedly mounted on the two ends of the fixing rod respectively. Pressure sensors are installed on the opposite sides of the two pressure plates, and an alarm is installed on the pressure plate, and the alarm is electrically connected to the pressure sensor.
[0009] Preferably, the elastic stretching member includes a slider and a first spring, the number of the sliders is two, both of the sliders are slidably sleeved on the fixed rod and located between the two pressure plates, the first spring is sleeved on the fixed rod and located between the two sliders, and the two ends of the first spring are respectively connected to the two sliders.
[0010] Preferably, the elastic top piece includes a fixed cylinder, and the two fixed cylinders are respectively installed on the side away from the two sliding blocks, and the two fixed cylinders are respectively arranged toward the two pressure sensors. An insertion cavity is opened in the fixed cylinder, and a second spring is installed in the insertion cavity. A push rod inserted into the insertion cavity is provided on the fixed cylinder, and one end of the push rod is connected to the second spring.
[0011] Preferably, mounting holes are provided at the bottoms of the two sliding blocks.
[0012] The above technical solution of the utility model has the following beneficial technical effects:
[0013] By arranging the pressure alarm part, elastic stretching part and elastic top part, when the connecting pipe on the cylinder body is connected to another cylinder, the elastic stretching part can be stretched on the fixed rod so that the elastic top parts on both sides of the elastic stretching part abut against the two pressure alarm parts respectively, and then the elastic stretching part can be connected to the connecting pipe and the other cylinder respectively. When the connection between the connecting pipe and the other cylinder is deformed to cause a gap, the elastic stretching part is deformed under the elastic action, and the value of the pressure of the elastic top part on the pressure alarm part will also change. When the value monitored by the pressure alarm part changes, an alarm will be given in time. This structure utilizes the fact that when the elastic stretching part is deformed at the connection, the pressure value of the elastic top part on the pressure alarm part will change rapidly, which can ensure that the alarm is given at the first time the gap is generated, improve the accuracy of the early warning, and avoid potential safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 The utility model is a schematic structural diagram of a high-sealing rear cylinder applied to a steam turbine.
[0015] Figure 2 The utility model is a partial structural schematic diagram of a high-sealing rear cylinder applied to a steam turbine.
[0016] Figure 3 The utility model is a structural schematic diagram of a pressure alarm component applied to a high-seal rear cylinder of a steam turbine.
[0017] Figure 4 The utility model is a schematic structural diagram of an elastic top member used in a high-sealing rear cylinder of a steam turbine.
[0018] Figure numerals: 1. Cylinder body; 2. Connecting pipe; 3. Fixing rod; 4. Pressure alarm; 41. Pressure plate; 42. Pressure sensor; 43. Alarm; 5. Elastic stretching member; 51. Slider; 52. First spring; 6. Elastic top member; 61. Fixing cylinder; 62. Second spring; 63. Top rod. DETAILED DESCRIPTION
[0019] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.
[0020] like Figure 1-4 As shown, the utility model proposes a high-sealing rear cylinder for a steam turbine, comprising a cylinder body 1 and a connecting pipe 2 connected to the cylinder body 1;
[0021] In this embodiment, a fixing rod 3 arranged parallel to the connecting pipe 2 is mounted on the cylinder body 1, and both ends of the fixing rod 3 are fitted with a pressure alarm 4. The pressure alarm 4 includes a pressure plate 41, and two pressure plates 41 are respectively fixedly fitted on both ends of the fixing rod 3, and pressure sensors 42 are mounted on opposite sides of the two pressure plates 41. An alarm 43 is mounted on the pressure plate 41, and the alarm 43 is electrically connected to the pressure sensor 42.
[0022] In this embodiment, an elastic stretching member 5 is sleeved on the fixed rod 3 and is located between the two pressure alarm members 4. The elastic stretching member 5 includes a slider 51 and a first spring 52. There are two sliders 51. Both sliders 51 are slidably sleeved on the fixed rod 3 and are located between the two pressure plates 41. The first spring 52 is sleeved on the fixed rod 3 and is located between the two sliders 51. Both ends of the first spring 52 are connected to the two sliders 51 respectively.
[0023] In this embodiment, elastic top pieces 6 are installed on both sides of the elastic stretching piece 5, and the two elastic top pieces 6 are respectively arranged toward the two pressure alarm pieces 4. The elastic top piece 6 includes a fixed cylinder 61, and the two fixed cylinders 61 are respectively installed on the side away from the two sliders 51, and the two fixed cylinders 61 are respectively arranged toward the two pressure sensors 42, and an insertion cavity is opened in the fixed cylinder 61, and a second spring 62 is installed in the insertion cavity, and a top rod 63 inserted into the insertion cavity is arranged on the fixed cylinder 61, and one end of the top rod 63 is connected to the second spring 62.
[0024] It should be noted that: in order to be able to give an alarm immediately after a gap appears at the connection of the cylinder body 1, when the connecting pipe 2 on the cylinder body 1 is connected to another cylinder, the two sliders 51 can slide on the fixed rod 3 and move away from each other, so that the first spring 52 between the two sliders 51 is stretched, and the push rods 63 on the two fixed cylinders 61 are respectively pressed against the two pressure sensors 42, and the second spring 62 in the fixed cylinder 61 is compressed at this time, and then the two sliders 51 can be connected to the connecting pipe 2 and the other cylinder respectively. When the connection between the connecting pipe 2 and the other cylinder is deformed and causes a gap, The corresponding slider 51 will slide on the fixed rod 3, and the first spring 52 between the two sliders 51 will be deformed under the action of elasticity, and the pressure of the push rod 63 against the pressure sensor 42 will also change. When the value monitored by the pressure sensor 42 changes, the information will be transmitted to the alarm 43, and the alarm will be sounded through the alarm 43. This structure utilizes the elastic tensile member 5 to deform at the connection, and the pressure value of the elastic top member 6 on the pressure alarm member 4 will change rapidly, which can ensure that the alarm is sounded at the first time the gap is generated, thereby improving the accuracy of the early warning and avoiding potential safety hazards.
[0025] In the specific embodiment, mounting holes are provided at the bottoms of the two sliders 51. The mounting holes facilitate the installation of the sliders 51.
[0026] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or the equivalent forms of such scope and boundaries.
Claims
1. A high-sealing rear cylinder for a steam turbine, comprising a cylinder body (1) and a connecting pipe (2) connected to the cylinder body (1), characterized in that: A fixing rod (3) arranged parallel to the connecting pipe (2) is mounted on the cylinder body (1), pressure alarm components (4) are mounted on both ends of the fixing rod (3), an elastic stretching component (5) located between the two pressure alarm components (4) is sleeved on the fixing rod (3), elastic top components (6) are mounted on both sides of the elastic stretching component (5), and the two elastic top components (6) are respectively arranged toward the two pressure alarm components (4).
2. The high-sealing rear cylinder for a steam turbine according to claim 1, characterized in that: The pressure alarm component (4) comprises a pressure plate (41), wherein the two pressure plates (41) are respectively fixedly mounted on the two ends of the fixing rod (3), and pressure sensors (42) are installed on opposite sides of the two pressure plates (41). An alarm (43) is installed on the pressure plate (41), and the alarm (43) is electrically connected to the pressure sensor (42).
3. The high-sealing rear cylinder for a steam turbine according to claim 2, characterized in that: The elastic stretching member (5) comprises a slider (51) and a first spring (52). The number of the sliders (51) is two. The two sliders (51) are both slidably sleeved on the fixed rod (3) and located between the two pressure plates (41). The first spring (52) is sleeved on the fixed rod (3) and located between the two sliders (51), and the two ends of the first spring (52) are respectively connected to the two sliders (51).
4. The high-sealing rear cylinder for a steam turbine according to claim 3, characterized in that: The elastic top member (6) comprises a fixed cylinder (61), the two fixed cylinders (61) are respectively mounted on the side away from the two sliders (51), the two fixed cylinders (61) are respectively arranged toward the two pressure sensors (42), an insertion cavity is provided in the fixed cylinder (61), and a second spring (62) is installed in the insertion cavity, and a top rod (63) inserted into the insertion cavity is provided on the fixed cylinder (61), and one end of the top rod (63) is connected to the second spring (62).
5. The high-sealing rear cylinder for a steam turbine according to claim 3, characterized in that: The bottoms of the two sliding blocks (51) are both provided with mounting holes.