Backup centrifugal pump deicing assembly

Abstract

The utility model relates to a backup centrifugal pump deicing assembly which aims at solving the technical problem that a shaft seal at a head of an existing backup centrifugal pump is in a low-temperature state for a long time, water molecules in air are frosted and frozen when encountering cold, and consequently the pump head is frozen, and the backup centrifugal pump deicing assembly comprises an annular pipe, a connecting rod and an air blowing pipe. The annular pipe is used at a shaft seal of the back centrifugal pump; the plurality of connecting rods are fixedly arranged on one side of the annular pipe in an annular array; a plurality of air blowing pipes are fixedly arranged on the inner ring of the annular pipe in an annular array; wherein the air blowing pipe is communicated with an inner cavity of the annular pipe, the air blowing pipe is arranged to be in a broken line shape, and the inclined section of the air blowing pipe is inclined relative to the back centrifugal pump; wherein an air outlet A and an air outlet B are sequentially formed in the air outlet side of the air blowing pipe. The back-up centrifugal pump shaft seal purging device has the advantages that the back-up centrifugal pump shaft seal purging device is aligned to a back-up centrifugal pump shaft seal to purge, low-temperature liquid and moisture at the shaft seal are blown away, and the phenomenon that a pump body at the shaft seal is frosted and frozen is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of backup centrifugal pump protection, in particular to a backup centrifugal pump deicing component. Background Art

[0002] Cryogenic liquid pump is a special pump used to transport cryogenic liquid. In the field of air separation, it is mainly used to transport liquid products, such as liquid oxygen pumps, liquid nitrogen pumps, liquid argon pumps and other liquid pumps. For centrifugal pumps with lower temperatures, mechanical seals are often used, but no matter which type of seal is used, liquid leakage is inevitable. After the cryogenic liquid leaks, the moisture in the air will condense into frost. After long-term operation, ice will form between the seal and the rotating shaft, which will hinder the rotation of the shaft, thereby increasing power consumption and reducing the service life of the liquid pump and motor.

[0003] In order to prevent the emergency device from being unable to meet the customer's gas demand when an abnormal situation occurs in the air separation production, a backup centrifugal pump is installed. The backup centrifugal pump is kept in cold standby all year round. The shaft seal at the pump head is in a low temperature state for a long time. The water molecules in the air frost and freeze when they are cold, causing the pump head to freeze, affecting the reliability of the gas supply system.

[0004] In view of this, we propose a backup centrifugal pump deicing assembly. Utility Model Content

[0005] The utility model aims to overcome the deficiencies of the prior art, meet actual needs, and provide a backup centrifugal pump deicing component to solve the technical problem that the shaft seal at the current backup centrifugal pump head is in a low temperature state for a long time, and the water molecules in the air are cold and frosted and frozen, causing the pump head to freeze.

[0006] In order to achieve the purpose of the utility model, the technical solution adopted by the utility model is: designing a backup centrifugal pump deicing assembly, including an annular pipe, a connecting rod and an air blowing pipe;

[0007] Used for annular pipe at the shaft seal of back centrifugal pump;

[0008] A plurality of connecting rods are fixedly arranged on one side of the annular tube in an annular array;

[0009] A plurality of blowing pipes are fixedly arranged in an annular array on the inner circle of the annular pipe;

[0010] The air blowing pipe is connected to the inner cavity of the annular tube, the air blowing pipe is arranged in a broken line shape, and the inclined section of the air blowing pipe is inclined relative to the back centrifugal pump;

[0011] Wherein, the air outlet side of the air blowing pipe is provided with an air outlet A and an air outlet B in sequence.

[0012] Preferably, a connecting pipe A is fixedly provided at the air inlet end of the annular tube, a tee is fixedly provided at the air inlet end of the connecting pipe A, a connecting pipe B is fixedly provided at the air inlet end of the tee, a ball valve body is fixedly provided at the air inlet end of the connecting pipe B, a connecting pipe C is fixedly provided at the air inlet end of the ball valve body, and a pressure gauge body is arranged at one connecting end of the tee.

[0013] Preferably, the air outlet A on the air outlet side of the blowing pipe is parallel to the shaft seal of the back centrifugal pump, and the air outlet B on the air outlet side of the blowing pipe is inclined toward the shaft seal of the back centrifugal pump.

[0014] Preferably, the air outlet A is arranged above the air outlet B.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The utility model has the advantages of purging the shaft seal of the backup centrifugal pump by arranging the annular pipe and the blowing pipe, so as to blow away the low-temperature liquid and moisture at the shaft seal and prevent the pump body from frosting and icing at the shaft seal, thereby solving the problem that the shaft seal at the backup centrifugal pump head is in a low-temperature state for a long time, and the water molecules in the air are cold and frosted and frozen, causing the pump head to freeze.

[0017] 2. The utility model has the advantages of providing the air outlet A and the air outlet B, accurately blowing at the shaft seal of the backup centrifugal pump through the inclined air outlet A, and clamping the gas flow at the shaft seal of the backup centrifugal pump through the air outlet B, thereby enhancing the blowing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the cross-sectional connection structure of the annular tube of the utility model;

[0020] Figure 3 For the utility model Figure 2 A magnified schematic diagram of point A;

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of the air blowing pipe of the utility model;

[0022] In the figure: 1. annular tube; 2. connecting rod; 3. air blowing tube; 4. connecting tube A; 5. tee; 6. connecting tube B; 7. ball valve body; 8. connecting tube C; 9. pressure gauge body;

[0023] 301. Air outlet A; 302. Air outlet B. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0025] Example 1: A backup centrifugal pump deicing assembly, see Figures 1 to 4 , comprising an annular tube 1, a connecting rod 2 and an air blowing tube 3;

[0026] An annular tube 1 is used for the shaft seal of a back centrifugal pump; a plurality of connecting rods 2 are fixedly arranged on one side of the annular tube 1 in an annular array; a plurality of blowing pipes 3 are fixedly arranged on the inner circle of the annular tube 1 in an annular array; wherein the blowing pipe 3 is connected to the inner cavity of the annular tube 1, the blowing pipe 3 is arranged in a broken line shape, and the inclined section of the blowing pipe 3 is inclined relative to the back centrifugal pump; wherein the outlet side of the blowing pipe 3 is provided with an outlet A301 and an outlet B302 in sequence.

[0027] The utility model has the advantages of purging the shaft seal of the backup centrifugal pump by arranging the annular pipe 1 and the blowing pipe 3, so as to blow away the low-temperature liquid and moisture at the shaft seal and prevent the pump body from frosting and icing at the shaft seal, thereby solving the problem that the shaft seal at the head of the backup centrifugal pump is in a low-temperature state for a long time, and the water molecules in the air are cold and frosted and frozen, causing the pump head to freeze.

[0028] Specifically, the air inlet end of the annular tube 1 is fixedly provided with a connecting pipe A4, the air inlet end of the connecting pipe A4 is fixedly provided with a tee 5, the air inlet end of the tee 5 is fixedly provided with a connecting pipe B6, the air inlet end of the connecting pipe B6 is fixedly provided with a ball valve body 7, the air inlet end of the ball valve body 7 is fixedly provided with a connecting pipe C8, and a pressure gauge body 9 is arranged at a connecting end of the tee 5. The connecting pipe C8 is connected to an external gas supply device, and the ball valve body 7 is opened, and the gas enters the annular tube 1 from the connecting pipe C8, the ball valve body 7, the connecting pipe B6, the tee 5 and the connecting pipe A4, and the gas is blown out from the gas outlet A301 and the gas outlet B302 of the blowing pipe 3 to purge the shaft seal of the backup centrifugal pump, and the real-time pressure of the gas is observed through the pressure gauge body 9.

[0029] Furthermore, the air outlet A301 on the air outlet side of the air blowing pipe 3 is parallel to the shaft seal of the back centrifugal pump, and the air outlet B302 on the air outlet side of the air blowing pipe 3 is inclined toward the shaft seal of the back centrifugal pump; the air outlet A301 is arranged above the air outlet B302.

[0030] The utility model has the advantages of accurately blowing at the shaft seal of the backup centrifugal pump through the inclined air outlet A301 and strengthening the blowing effect by clamping the gas flow at the shaft seal of the backup centrifugal pump through the air outlet B302 by setting the air outlet A301 and the air outlet B302.

[0031] Working principle: When using the device of the utility model, the annular tube 1 is sleeved on the shaft seal of the backup centrifugal pump, the air outlet B302 is tilted toward the shaft seal of the back centrifugal pump, the connecting pipe C8 is connected to the external air supply device, the ball valve body 7 is opened, and the gas enters the annular tube 1 from the connecting pipe C8, the ball valve body 7, the connecting pipe B6, the tee 5 and the connecting pipe A4, and the gas is blown out from the air outlet A301 and the air outlet B302 of the blowing pipe 3 to purge the shaft seal of the backup centrifugal pump, and the real-time pressure of the gas is observed through the pressure gauge body 9. The shaft seal of the backup centrifugal pump is accurately purged through the inclined air outlet A301, and the gas flow at the shaft seal of the backup centrifugal pump is blocked through the air outlet B302 to enhance the purging effect.

[0032] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A backup centrifugal pump deicing assembly, characterized in that: include: An annular tube (1) for the shaft seal of a rear centrifugal pump; A plurality of connecting rods (2) are fixedly arranged on one side of the annular tube (1) in an annular array; A plurality of blowing pipes (3) are arranged in an annular array and fixedly mounted on the inner circle of the annular pipe (1); The air blowing pipe (3) is connected to the inner cavity of the annular pipe (1), the air blowing pipe (3) is configured in a broken line shape, and the inclined section of the air blowing pipe (3) is inclined relative to the back centrifugal pump; Wherein, the air outlet side of the air blowing pipe (3) is provided with an air outlet A (301) and an air outlet B (302) in sequence.

2. A backup centrifugal pump deicing assembly as claimed in claim 1, characterized in that: The air inlet end of the annular tube (1) is fixedly provided with a connecting pipe A (4), the air inlet end of the connecting pipe A (4) is fixedly provided with a tee (5), the air inlet end of the tee (5) is fixedly provided with a connecting pipe B (6), the air inlet end of the connecting pipe B (6) is fixedly provided with a ball valve body (7), the air inlet end of the ball valve body (7) is fixedly provided with a connecting pipe C (8), and a pressure gauge body (9) is arranged at one connecting end of the tee (5).

3. A backup centrifugal pump deicing assembly as claimed in claim 1, characterized in that: The air outlet A (301) on the air outlet side of the air blowing pipe (3) is parallel to the shaft seal of the back centrifugal pump, and the air outlet B (302) on the air outlet side of the air blowing pipe (3) is inclined toward the shaft seal of the back centrifugal pump.

4. A backup centrifugal pump deicing assembly as claimed in claim 3, characterized in that: The air outlet A (301) is arranged above the air outlet B (302).

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