Vertical low-pressure heater capable of buffering steam to enter steam turbine

Abstract

The utility model discloses a vertical low-pressure heater capable of buffering steam to enter a steam turbine, which relates to the technical field of low-pressure heaters and comprises a low-pressure heater body, a supporting component is arranged at the bottom of the low-pressure heater body, and a pipeline is fixedly connected to the top of the low-pressure heater body. The outer wall of the low-pressure heater body is fixedly connected with an air inlet assembly. The supporting assembly comprises a mounting base. According to the vertical low-pressure heater capable of buffering steam to enter the steam turbine, in the impact process of the heater, the supporting stability of the low-pressure heater body can be improved by means of a shock pad in the supporting seat, and in addition, the supporting seat can be supported by means of a connecting spring in the mounting seat; and a movable rod at the bottom of the supporting seat can be pushed to move, so that the movable rod can push a sliding sleeve to move, the sliding sleeve can slide along the outer wall of a guide rod, a supporting spring can be supported, and the buffering capacity of the low-pressure heater body can be improved.

Description

Technical Field

[0001] This utility model relates to the field of low-pressure heater technology, specifically a vertical low-pressure heater that buffers steam so that it can enter a steam turbine. Background Technology

[0002] Low-pressure heaters are indispensable equipment in thermal systems, primarily used to recover waste heat from turbine exhaust steam, thereby improving the overall thermal efficiency of the system. The function of a low-pressure heater is to utilize steam that has performed some work within the turbine, drawing it into the heater to heat feedwater, increasing the water temperature, reducing the amount of steam discharged from the turbine to the condenser, lowering energy losses, and improving the cycle efficiency of the thermal system. The structure commonly employs a vertical tube sheet type heater, where the heating surface is typically composed of straight tube bundles or U-shaped tube bundles made of brass or seamless steel tubes. The water to be heated enters from the upper inlet pipe into one side of the separated water chamber, then flows into the U-shaped tube bundle. The U-shaped tubes absorb heat from the heating steam in the heater's steam space, transferring it through the tube walls to the water flowing inside. The heated water then flows out through the heater's outlet water chamber.

[0003] The prior art patent document CN218095894U provides a small vertical low-pressure heater that is easy to adjust. The device is equipped with an adjustment device to facilitate the mechanical adjustment of the lifting and lowering movement of the vertical low-pressure heater body, thereby facilitating the installation of pipes on the outside of the vertical low-pressure heater body by the staff. The fixed support device is provided to facilitate the manual fixing of the wheels and prevent the wheels from moving.

[0004] However, in existing low-pressure heaters, the steam inlet pressure is generally high. When the steam inlet pressure is high, it will impact the internal structure of the heater, causing increased equipment vibration and affecting its stability. After the high-pressure steam enters, the temperature in the local area rises rapidly, generating thermal stress, which may lead to material fatigue or cracking. The lack of a buffer structure results in uneven steam distribution, reduced heat exchange efficiency, and affects the overall system performance. Frequent pressure shocks and thermal stress concentrations will accelerate equipment aging and shorten its service life. Therefore, we need a vertical low-pressure heater that can buffer steam to enter the steam turbine. Utility Model Content

[0005] The purpose of this invention is to provide a vertical low-pressure heater that allows buffered steam to enter a steam turbine, in order to solve the existing problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a vertical low-pressure heater for buffered steam to enter a steam turbine, comprising a low-pressure heater body, a support assembly at the bottom of the low-pressure heater body, a pipe fixedly connected to the top of the low-pressure heater body, and an air inlet assembly fixedly connected to the outer wall of the low-pressure heater body; the support assembly includes a mounting base, a guide rod fixedly connected inside the mounting base, a support spring sleeved on the outer wall of the guide rod, a sliding sleeve slidably connected to the outer wall of the guide rod, a movable rod movably connected to the top of the sliding sleeve, a connecting spring fixedly connected to the top of the mounting base, a support seat fixedly connected to the top of the connecting spring, and a shock-absorbing pad fixedly connected to the top of the support seat.

[0007] Preferably, the sliding sleeve forms a sliding structure with a guide rod and a support spring, and the outer diameter of the guide rod matches the inner diameter of the sliding sleeve, and the outer wall of the guide rod is fitted to the inner wall of the sliding sleeve.

[0008] Preferably, the mounting base is elastically connected to the support base via a connecting spring, with one end of the connecting spring connected to the top of the mounting base and the other end of the connecting spring connected to the top of the support base.

[0009] Preferably, the support base forms a shock-absorbing structure with the low-pressure heater body through a shock-absorbing pad, and the shock-absorbing pad is disposed between the support base and the low-pressure heater body.

[0010] Preferably, the air intake assembly includes an air intake pipe, an inner pipe fixedly connected inside the air intake pipe, a support plate fixedly connected inside the inner pipe, a mounting spring fixedly connected to the top of the support plate, a movable valve fixedly connected to the top of the mounting spring, and a guide plate fixedly connected inside the inner pipe.

[0011] Preferably, the support plate forms an elastic structure with the movable valve by means of a mounting spring, and the mounting spring is disposed between the support plate and the movable valve.

[0012] Preferably, there are multiple guide plates inside the inner tube, and the multiple guide plates are arranged at equal intervals inside the inner tube.

[0013] Compared with the prior art, the beneficial effect of this utility model is that the buffered steam can enter the vertical low-pressure heater of the steam turbine.

[0014] (1) During the impact process of the heater, the shock-absorbing pad in the support seat can improve the support stability of the low-pressure heater body. In addition, the connecting spring in the mounting seat can support the support seat and push the movable rod at the bottom of the support seat to move, so that the movable rod can push the sliding sleeve to move, so that the sliding sleeve can slide along the outer wall of the guide rod, thereby supporting the support spring and improving the buffering capacity of the low-pressure heater body.

[0015] (2) By directly connecting the air inlet pipe to the external equipment, steam can be directly introduced into the air inlet pipe. When the steam pressure is too high, pressure can be applied to the movable valve in the inner pipe, and the movable valve can squeeze the spring on the support plate, which can cause the movable valve to separate from the inner pipe. Then, steam can enter through the gap between the movable valve and the inner pipe. The steam can be guided by the multiple guide plates, reducing the impact of steam on the heater. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of the present utility model;

[0017] Figure 2 This is a schematic diagram of the mounting base and sliding sleeve structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the support base and connecting spring structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the inner tube and movable valve structure of this utility model.

[0020] In the diagram: 1. Low-pressure heater body; 2. Support assembly; 201. Mounting base; 202. Guide rod; 203. Support spring; 204. Sliding sleeve; 205. Movable rod; 206. Connecting spring; 207. Support seat; 208. Shock-absorbing pad; 3. Pipeline; 4. Inlet assembly; 401. Inlet pipe; 402. Inner pipe; 403. Support plate; 404. Mounting spring; 405. Movable valve; 406. Guide plate. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] This utility model embodiment provides a vertical low-pressure heater that allows buffered steam to enter a steam turbine, such as... Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the device includes a low-pressure heater body 1, a support assembly 2 at the bottom of the low-pressure heater body 1, a pipe 3 fixedly connected to the top of the low-pressure heater body 1, and an air inlet assembly 4 fixedly connected to the outer wall of the low-pressure heater body 1. The support assembly 2 includes a mounting base 201, a guide rod 202 fixedly connected inside the mounting base 201, a support spring 203 sleeved on the outer wall of the guide rod 202, and a sliding sleeve 204 slidably connected to the outer wall of the guide rod 202. The sliding sleeve 204 forms a sliding structure with the support spring 203 through the guide rod 202, and the outer diameter of the guide rod 202 matches the inner diameter of the sliding sleeve 204. The outer wall of the rod 202 fits snugly against the inner wall of the sliding sleeve 204, enhancing the connection between the guide rod 202 and the sliding sleeve 204. This allows the guide rod 202 to be supported by the support spring 203 on the sliding sleeve 204. A movable rod 205 is movably connected to the top of the sliding sleeve 204. A connecting spring 206 is fixedly connected to the top of the mounting base 201, and a support base 207 is fixedly connected to the top of the connecting spring 206. The mounting base 201 and the support base 207 form an elastic connection structure through the connecting spring 206 and the support base 207. One end of the connecting spring 206 is connected to the top of the mounting base 201, and the other end of the connecting spring 206... The connection between the mounting base 201 and the connecting spring 206 is strengthened by connecting the top of the support base 207. This allows the mounting base 201 to support and buffer the support base 207 with the connecting spring 206. A shock-absorbing pad 208 is fixedly connected to the top of the support base 207. The support base 207 and the low-pressure heater body 1 form a shock-absorbing structure through the shock-absorbing pad 208. The shock-absorbing pad 208 is located between the support base 207 and the low-pressure heater body 1, strengthening the connection between the support base 207 and the shock-absorbing pad 208. This allows the support base 207 to withstand the low-pressure heating under the support of the shock-absorbing pad 208. The heater body 1 is supported and buffered. During the impact of the heater, the shock-absorbing pad 208 in the support seat 207 can improve the support stability of the low-pressure heater body 1. In addition, the connecting spring 206 in the mounting seat 201 can support the support seat 207 and push the movable rod 205 at the bottom of the support seat 207 to move. The movable rod 205 can push the sliding sleeve 204 to move, and the sliding sleeve 204 can slide along the outer wall of the guide rod 202, thereby supporting the support spring 203 and improving the buffering capacity of the low-pressure heater body 1.

[0023] In a further preferred embodiment of this utility model, such as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the intake assembly 4 includes an intake pipe 401, an inner pipe 402 fixedly connected inside the intake pipe 401, a support plate 403 fixedly connected inside the inner pipe 402, a mounting spring 404 fixedly connected to the top of the support plate 403, and a movable valve 405 fixedly connected to the top of the mounting spring 404. The support plate 403 and the movable valve 405 form an elastic structure through the mounting spring 404, and the mounting spring 404 is positioned between the support plate 403 and the movable valve 405, strengthening the connection between the support plate 403 and the mounting spring 404. This allows the support plate 403 to support the movable valve 405 under the support of the mounting spring 404. Multiple guide plates 406 are fixedly connected inside the inner pipe 402. Multiple guide plates 406 are evenly spaced inside the inner tube 402, enhancing the connection between the inner tube 402 and the guide plates 406. This allows the multiple guide plates 406 to guide and transport steam. By directly connecting the inlet pipe 401 to external equipment, steam can directly enter the inlet pipe 401. If the steam pressure is too high, pressure can be applied to the movable valve 405 inside the inner tube 402, causing the movable valve 405 to squeeze the mounting spring 404 on the support plate 403. This causes the movable valve 405 to disengage from the inner tube 402, allowing steam to enter through the gap between the movable valve 405 and the inner tube 402. The multiple guide plates 406 guide the steam, reducing the impact of steam on the heater.

[0024] Working Principle: During use, the inlet pipe 401 can be directly connected to external equipment, allowing steam to directly enter the inlet pipe 401. If the steam pressure is too high, pressure can be applied to the movable valve 405 inside the inner pipe 402, causing the valve 405 to press against the mounting spring 404 on the support plate 403. This disengages the valve 405 from the inner pipe 402, allowing steam to enter through the gap between the valve 405 and the inner pipe 402. Multiple guide plates 406 further guide the steam, reducing its impact on the heater. Additionally, if... During the impact process of the heater, the shock-absorbing pad 208 in the support base 207 can improve the support stability of the low-pressure heater body 1. In addition, the connecting spring 206 in the mounting base 201 can support the support base 207 and push the movable rod 205 at the bottom of the support base 207 to move. The movable rod 205 can push the sliding sleeve 204 to move, and the sliding sleeve 204 can slide along the outer wall of the guide rod 202, thereby supporting the support spring 203. This improves the buffering capacity of the low-pressure heater body 1 and meets people's daily use needs.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A vertical low pressure heater, in which steam can enter a steam turbine, comprising a low pressure heater body (1), characterized in that: The bottom of the low-pressure heater body (1) is provided with a support assembly (2), the top of the low-pressure heater body (1) is fixedly connected with a pipe (3), and the outer wall of the low-pressure heater body (1) is fixedly connected with an air inlet assembly (4). The support assembly (2) includes a mounting base (201), a guide rod (202) is fixedly connected to the inner side of the mounting base (201), a support spring (203) is sleeved on the outer wall of the guide rod (202), a sliding sleeve (204) is slidably connected to the outer wall of the guide rod (202), a movable rod (205) is movably connected to the top of the sliding sleeve (204), a connecting spring (206) is fixedly connected to the top of the mounting base (201), a support seat (207) is fixedly connected to the top of the connecting spring (206), and a shock-absorbing pad (208) is fixedly connected to the top of the support seat (207).

2. The vertical low pressure heater for a buffered steam admitting steam turbine according to claim 1, characterized by: The sliding sleeve (204) forms a sliding structure with the support spring (203) through the guide rod (202), and the outer diameter of the guide rod (202) matches the inner diameter of the sliding sleeve (204), and the outer wall of the guide rod (202) is fitted to the inner wall of the sliding sleeve (204).

3. The vertical low pressure heater for a buffered steam admitting steam turbine of claim 1, wherein: The mounting base (201) is connected to the support base (207) by a connecting spring (206) to form an elastic connection structure. One end of the connecting spring (206) is connected to the top of the mounting base (201), and the other end of the connecting spring (206) is connected to the top of the support base (207).

4. The vertical low pressure heater for a buffered steam admitting steam turbine of claim 1, wherein: The support base (207) forms a shock-absorbing structure with the low-pressure heater body (1) through the shock-absorbing pad (208), and the shock-absorbing pad (208) is disposed between the support base (207) and the low-pressure heater body (1).

5. The vertical low pressure heater for a buffered steam admitted steam turbine of claim 1 wherein: The air intake assembly (4) includes an air intake pipe (401), an inner pipe (402) is fixedly connected inside the air intake pipe (401), a support plate (403) is fixedly connected inside the inner pipe (402), a mounting spring (404) is fixedly connected to the top of the support plate (403), a movable valve (405) is fixedly connected to the top of the mounting spring (404), and a guide plate (406) is fixedly connected inside the inner pipe (402).

6. The vertical low pressure heater for a buffered steam admitted steam turbine of claim 5 wherein: The support plate (403) forms an elastic structure with the movable valve (405) by means of a mounting spring (404), and the mounting spring (404) is disposed between the support plate (403) and the movable valve (405).

7. The vertical low pressure heater for a buffered steam admitted steam turbine of claim 5 wherein: The inner tube (402) contains multiple guide plates (406), and the multiple guide plates (406) are arranged at equal intervals inside the inner tube (402).

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