Shaft seal electric heater of shaft seal system

Abstract

The utility model belongs to the technical field of shaft seal heating, and particularly relates to a shaft seal electric heater of a shaft seal system, which comprises a barrel, a heating mechanism is arranged in the barrel, a cleaning component is arranged on the inner wall of the barrel, and the cleaning component comprises two scraping rings slidably connected onto the inner wall of the barrel. Connecting rods distributed in a circumferential array mode are fixedly connected between the two scraping rings, a sliding driving assembly for driving the cleaning assembly to slide on the inner wall of the barrel is arranged on the barrel, and two sewage draining outlets are formed in the bottom of the barrel. According to the maintenance device for shaft seal heating, the slidable scraping ring is arranged in the maintenance device for shaft seal heating, dirt and impurities attached to the inner wall of the barrel are scraped away through the scraping ring, and therefore the dirt and the impurities can be discharged out of the barrel along with residual liquid, and the impurities left in the barrel and attached to the barrel can be easily discharged; and the influence on the heating quality of the shaft seal electric heater of the shaft seal system is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of shaft seal heating, in particular to a shaft seal electric heater of a shaft seal system. Background Art

[0002] The shaft seal heater is a device that recovers the leakage steam of the shaft seal and uses its heat to heat the condensate, reducing energy loss and improving the thermal efficiency of the unit. When the steam turbine adopts an internal leakage shaft seal system, a shaft seal heater (shaft seal cooler) is generally used to heat the condensate or demineralized water and recover the leakage steam of the shaft seal, thereby reducing the leakage steam and heat loss of the shaft seal and improving the environmental conditions of the workshop;

[0003] After a lot of searching, it was found that: China Utility Model Patent Column: Publication No. CN 216240819 U is a kind of explosion-proof shaft seal electric heater for steam turbine, including a cylinder and a heating core, the heating core is installed inside the cylinder, and one end of the heating core extends to the outside of the cylinder, one end of the heating core is connected to a junction box, the bottom of the cylinder close to the junction box is connected to a support seat, a tilting mechanism is provided inside the support seat, the tilting mechanism includes a blind hole, a motor is provided inside the blind hole, the top of the motor is connected to the support seat, the output end of the motor is connected to a rotating shaft, the outside of the bottom end of the rotating shaft is connected to a lifting block matching the blind hole, and the bottom of the cylinder away from the junction box is connected to a sewage pipe; the device adjusts the inclination angle of the cylinder so that the impurities in the cylinder are discharged to the sewage pipe along with the residual liquid, thereby ensuring the heating quality of the next time, but the dirt and impurities attached to the inner wall of the cylinder are not easy to be cleaned, which affects the heating quality of the next time. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the utility model provides a shaft seal electric heater for a shaft seal system, which solves the problem that dirt and impurities inside the shaft seal electric heater for the shaft seal system are difficult to clean, thus affecting the quality of the next heating.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0008] The shaft seal electric heater of the shaft seal system comprises a cylinder, a heating mechanism is arranged inside the cylinder, a cleaning assembly is arranged on the inner wall of the cylinder, the cleaning assembly comprises two scraping rings slidably connected to the inner wall of the cylinder, a connecting rod distributed in a circumferential array is fixedly connected between the two scraping rings, a sliding drive assembly is arranged on the cylinder to drive the cleaning assembly to slide on the inner wall of the cylinder, and two sewage outlets are provided at the bottom of the cylinder.

[0009] Furthermore, the sliding drive assembly includes a storage rod and a connecting rope fixedly connected to the two scraper rings. The storage rod is rotatably connected to the cylinder through a bearing seat. A servo motor is provided on the cylinder to drive the storage rod to rotate. The two connecting ropes are wound around the storage rod in a forward and reverse direction relative to each other.

[0010] Furthermore, two fixing rods are fixedly connected in the cylinder, and the ends of the fixing rods are rotatably connected to pulleys through bearing seats, and the connecting ropes are passed around the pulleys.

[0011] Furthermore, a feed pipe and a discharge pipe are arranged on the cylinder.

[0012] Furthermore, two support rods are arranged at the bottom of the cylinder.

[0013] Furthermore, the heating mechanism includes a junction box arranged on one side of the cylinder and heating cells distributed in a circumferential array, wherein the heating cells are arranged inside the cylinder, and the ends of the heating cells are fixedly connected to the junction box.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the utility model provides a shaft seal electric heater for a shaft seal system, which has the following beneficial effects:

[0016] The utility model provides a slidable scraper ring in the shaft seal heating maintenance device, and utilizes the scraper ring to scrape away dirt and impurities attached to the inner wall of the cylinder, so that the dirt and impurities can be discharged from the cylinder together with the residual liquid, so that the impurities remaining and attached in the cylinder can be easily discharged and the heating quality of the shaft seal electric heater of the shaft seal system is avoided to be affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the utility model as a whole;

[0018] Figure 2 It is a cross-sectional stereoscopic schematic diagram of the utility model as a whole;

[0019] Figure 3 It is a cross-sectional three-dimensional schematic diagram of the cylinder of the utility model;

[0020] Figure 4 It is a three-dimensional schematic diagram of the cooperation between the storage rod and the scraper ring of the utility model.

[0021] In the figure: 1. Cylinder; 2. Drain port; 3. Discharge pipe; 4. Storage rod; 5. Heating mechanism; 6. Servo motor; 7. Feed pipe; 8. Scraper ring; 9. Heating cell; 10. Fixing rod; 11. Pulley; 12. Connecting rope; 13. Support rod. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Example

[0024] like Figures 1 to 4 As shown, a shaft seal electric heater for a shaft seal system proposed in an embodiment of the utility model comprises a cylinder 1, a heating mechanism is arranged in the cylinder 1, a cleaning assembly is arranged on the inner wall of the cylinder 1, the cleaning assembly comprises two scraper rings 8 slidably connected to the inner wall of the cylinder 1, a connecting rod distributed in a circumferential array is fixedly connected between the two scraper rings 8, a sliding drive assembly is arranged on the cylinder 1 to drive the cleaning assembly to slide on the inner wall of the cylinder 1, and two sewage outlets 2 are arranged at the bottom of the cylinder 1;

[0025] The scraper ring 8 in the sliding cylinder 1 scrapes off the dirt and impurities attached to the inner wall of the cylinder 1, so that the dirt and impurities fall into the residual liquid or the cleaning liquid and are discharged from the drain port 2 together with the residual liquid or the cleaning liquid.

[0026] like Figure 2 and Figure 4 As shown, in some embodiments, the sliding drive assembly includes a storage rod 4 and a connecting rope 12 fixedly connected to two scraper rings 8, the storage rod 4 is rotatably connected to the cylinder 1 through a bearing seat, and a servo motor 6 for driving the storage rod 4 to rotate is provided on the cylinder 1, and the two connecting ropes 12 are wound around each other in a positive and negative direction and connected to the storage rod 4;

[0027] The servo motor 6 is electrically connected to the power supply, and the servo motor 6 is used to drive the storage rod 4 to rotate back and forth. The storage rod 4 stores one end of the connecting rope 12, and at the same time, the storage rod 4 will also wind the other end of the connecting rope 12, so that the connecting rope 12 pulls the scraper ring 8 to slide inside the cylinder 1, and the scraper ring 8 scrapes off the dirt and impurities on the inner wall of the cylinder 1.

[0028] like Figure 2 and Figure 3 As shown, in some embodiments, two fixed rods 10 are fixedly connected in the cylinder 1, and the ends of the fixed rods 10 are rotatably connected to the pulley 11 through the bearing seat, and the connecting rope 12 passes around the pulley 11;

[0029] The pulley 11 is used to reduce the friction of the connecting rope 12 and to change the direction of movement and force of the connecting rope 12 .

[0030] like Figure 3As shown, in some embodiments, a feed pipe 7 and a discharge pipe 3 are provided on the cylinder 1;

[0031] The feed pipe 7 is used to feed the heated liquid, and the discharge pipe 3 is used to discharge the heated liquid.

[0032] like Figure 1 As shown, in some embodiments, two support rods 13 are provided at the bottom of the cylinder 1 .

[0033] like Figure 2 As shown, in some embodiments, the heating mechanism includes a junction box 5 arranged on one side of the barrel 1 and heating cells 9 distributed in a circumferential array, the heating cells 9 are arranged inside the barrel 1, and the ends of the heating cells 9 are fixedly connected to the junction box 5;

[0034] The junction box 5 is used to control the operation of the heating core 9, and the heating core 9 is used to heat the heating liquid.

[0035] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A shaft seal electric heater for a shaft seal system, comprising a cylinder (1), wherein a heating mechanism is arranged in the cylinder (1), and characterized in that: A cleaning assembly is arranged on the inner wall of the cylinder (1), the cleaning assembly comprising two scraper rings (8) slidably connected to the inner wall of the cylinder (1), a connecting rod distributed in a circumferential array is fixedly connected between the two scraper rings (8), a sliding drive assembly is arranged on the cylinder (1) for driving the cleaning assembly to slide on the inner wall of the cylinder (1), and two sewage outlets (2) are provided at the bottom of the cylinder (1).

2. The shaft seal electric heater of the shaft seal system according to claim 1, characterized in that: The sliding drive assembly comprises a storage rod (4) and a connecting rope (12) fixedly connected to two scraper rings (8); the storage rod (4) is rotatably connected to the cylinder (1) via a bearing seat; a servo motor (6) for driving the storage rod (4) to rotate is arranged on the cylinder (1); and the two connecting ropes (12) are connected to the storage rod (4) by being wound around each other in a forward and reverse direction.

3. The shaft seal electric heater of the shaft seal system according to claim 2, characterized in that: Two fixed rods (10) are fixedly connected inside the cylinder (1), and the ends of the fixed rods (10) are rotatably connected to pulleys (11) via bearing seats, and the connecting rope (12) passes around the pulleys (11).

4. The shaft seal electric heater of the shaft seal system according to claim 1, characterized in that: The cylinder (1) is provided with a feed pipe (7) and a discharge pipe (3).

5. The shaft seal electric heater of the shaft seal system according to claim 1, characterized in that: Two support rods (13) are arranged at the bottom of the cylinder (1).

6. The shaft seal electric heater of the shaft seal system according to claim 1, characterized in that: The heating mechanism comprises a junction box (5) arranged on one side of the cylinder (1) and heating cores (9) distributed in a circumferential array, wherein the heating cores (9) are arranged inside the cylinder (1), and the ends of the heating cores (9) are fixedly connected to the junction box (5).

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