CN219224075U

CN219224075U - Pressure test detection mechanism for lower valve box lower seal assembly of blast furnace equipment

Info

Publication number: CN219224075U
Application number: CN202320729139.4U
Authority: CN
Inventors: 黎长友; 杜传; 包妍琳; 周治国
Original assignee: Chongqing Iron and Steel Co Ltd
Current assignee: Chongqing Iron and Steel Co Ltd
Priority date: 2023-04-04
Filing date: 2023-04-04
Publication date: 2023-06-20
Anticipated expiration: 2033-04-04

Abstract

The utility model belongs to the technical field of blast furnace equipment, and relates to a pressure test detection mechanism for a lower valve box lower seal assembly of blast furnace equipment, which comprises a detection box, wherein an air cavity for pressurizing detection is arranged in the detection box; one side of the detection box is provided with a connecting flange for installing a lower seal assembly; an air inlet pipeline communicated with the air cavity is arranged on the other side of the detection box, and a pressure gauge and a valve are arranged on the air inlet pipeline; the lower sealing assembly is arranged on the mounting hole and is in sealing connection with the side wall of the detection box; and (5) pressurizing the air cavity to detect each sealing point of the lower seal assembly. The pressure test detection mechanism provided by the utility model realizes the tightness detection of the lower seal assembly before assembly, can improve the safety of the lower seal assembly, reduce the failure rate, improve the production efficiency and reduce the overhaul shutdown rate.

Description

Pressure test detection mechanism for lower valve box lower seal assembly of blast furnace equipment

Technical Field

The utility model belongs to the technical field of blast furnace equipment, and relates to a pressure test detection mechanism for a lower valve box lower seal assembly of blast furnace equipment.

Background

The lower box seal assembly in the blast furnace installation is generally referred to as a lower box bottom seal structure for preventing leakage of molten iron from the lower box. The sealing system consists of a sewer mouth sealant, a sealing cover, a sealing disk and the like. The lower valve box lower sealing assembly is often influenced by severe working conditions such as high temperature, high pressure, corrosion and the like, and high-temperature and corrosion-resistant materials such as refractory materials, high-temperature-resistant rubber and the like are required to be selected. Meanwhile, in the process of using and maintaining, attention needs to be paid to whether the sealing performance of the sealant and the sealing disc is good or not so as to ensure the normal operation of the lower valve box lower seal assembly.

The lower sealing assembly belongs to the key equipment of the blast furnace, the quality relation production is smooth, the machine is used without pre-detection at present, and the sealing performance of the lower sealing assembly has uncertainty. The lower sealing assembly bears the pressure in the blast furnace in the production process, and has gas such as coal gas, nitrogen and the like, so that the leakage is avoided, the hazard is high, and the tightness detection is required to be carried out on the lower sealing assembly before the assembly so as to ensure the safety during the use.

Disclosure of Invention

In view of the above, the utility model aims to solve the problem of tightness detection of a lower seal assembly of a lower valve box of a blast furnace and provides a pressure test mechanism of the lower seal assembly of the lower valve box of blast furnace equipment.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the pressure test detection mechanism for the lower sealing assembly of the lower valve box of the blast furnace equipment comprises a detection box, wherein an air cavity for pressurizing detection is arranged in the detection box; one side of the detection box is provided with a connecting flange for installing a lower seal assembly; an air inlet pipeline communicated with the air cavity is arranged on the other side of the detection box, and a pressure gauge and a valve are arranged on the air inlet pipeline; the lower sealing assembly is arranged on the mounting hole and is in sealing connection with the side wall of the detection box; and (5) pressurizing the air cavity to detect each sealing point of the lower seal assembly.

Further, a sealing ring is arranged between the connecting flange and the contact end face of the lower sealing assembly.

Further, the bottom of detection case is equipped with rag bolt to fix through rag bolt.

The utility model has the beneficial effects that:

the pressure test detection mechanism provided by the utility model realizes the tightness detection of the lower seal assembly before assembly, can improve the safety of the lower seal assembly, reduce the failure rate, improve the production efficiency and reduce the overhaul shutdown rate.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model. The objects and other advantages of the utility model may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.

Drawings

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in the following preferred detail with reference to the accompanying drawings, in which:

FIG. 1 is a schematic diagram of a pressure test and detection mechanism for a lower valve box lower seal assembly of blast furnace equipment.

Marking: 1-a connecting flange; 6-a bottom plate; 7-anchor bolts; 8-a lower seal assembly mounting hole; 9-connecting bolts; 10-a lower crank arm; 11-a sealing ring; 18-tilting oil cylinder; 19-turning arm rotating oil cylinders; 20-an air inlet pipeline; 21-a pressure gauge; 23-valve; 2. 3, 4, 5 and 24 are box body panels; 12. 13, 14, 15, 16, 17, 20 are seal detection points.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present utility model by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.

Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the utility model; for the purpose of better illustrating embodiments of the utility model, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numbers in the drawings of embodiments of the utility model correspond to the same or similar components; in the description of the present utility model, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, it is only for convenience of describing the present utility model and simplifying the description, but not for indicating or suggesting that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limiting the present utility model, and that the specific meaning of the above terms may be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1, a pressure test mechanism for a lower valve box lower seal assembly of a blast furnace device comprises a test box, wherein the test box is formed by welding a box panel 2, a box panel 3, a box panel 4, a box panel 5, a box panel 24 and a bottom plate 6. An air cavity for pressurizing detection is arranged in the detection box; one side of the detection box is provided with a connecting flange 1, and a lower seal assembly mounting hole 8 on the lower seal assembly is connected to the connecting flange 1 through a connecting bolt 9; an air inlet pipeline 20 communicated with the air cavity is arranged on the other side of the detection box, and a pressure gauge 21 and a valve 23 are arranged on the air inlet pipeline 20; the lower sealing assembly is arranged on the mounting hole and is in sealing connection with the side wall of the detection box; and (5) pressurizing the air cavity to detect each sealing point of the lower seal assembly.

Wherein, be provided with the sealing washer between flange 1 and the contact terminal surface of lower close assembly. The bottom plate 6 of the detection box is provided with anchor bolts 7 and is fixed through the anchor bolts 7.

The sealing detection is carried out by adopting the pressure test detection mechanism of the lower valve box lower seal assembly of the blast furnace equipment, and the method comprises the following steps:

1) The lower sealing assembly is arranged on the connecting flange 1, the lower sealing crank arm 10 extends into the air cavity, and the air cavity is communicated with the inner hole of the lower sealing assembly and is sealed by a sealing ring;

2) Static pressure detection: compressed air is added into the air cavity through the air inlet pipeline 20, the pressure is controlled to be 1.5-2 times of the working condition pressure, the valve 23 is closed, the pressure is maintained for 30 minutes, the sealing ring 11, the sealing detection point 12, the sealing detection point 13, the sealing detection point 14, the sealing detection point 15, the sealing detection point 16, the sealing detection point 17 and the sealing detection point 20 are respectively detected, and whether the pressure value of the pressure gauge 21 is reduced or not is checked;

3) Dynamic pressure detection: the pressure of the air cavity is 1.5-2 times of the pressure of the working condition, and the tightness of the sealing point at the side of the inner hole in a moving state is detected by driving the tilting oil cylinder 18 of the lower seal assembly to reciprocate in the hole; the sealing performance of the sealing point at the outer circle side of the shaft in a moving state is detected by rotating the crank arm rotary oil cylinder 19 to rotate 90 degrees in a reciprocating manner.

In the sealing detection process, whether leakage and leakage positions are judged through hearing, grease smearing and washing powder water.

In the test process, if the pressure of the barometer is not reduced, the barometer is qualified, otherwise, the barometer is unqualified, and the leakage point is maintained.

Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present utility model, which is intended to be covered by the claims of the present utility model.

Claims

1. The utility model provides a close assembly pressure testing detection mechanism under blast furnace equipment lower valve box which characterized in that: the device comprises a detection box, wherein an air cavity for pressurizing detection is arranged in the detection box; one side of the detection box is provided with a connecting flange for installing a lower seal assembly; an air inlet pipeline communicated with the air cavity is arranged on the other side of the detection box, and a pressure gauge and a valve are arranged on the air inlet pipeline; the lower sealing assembly is arranged on the mounting hole and is in sealing connection with the side wall of the detection box; and (5) pressurizing the air cavity to detect each sealing point of the lower seal assembly.

2. The blast furnace equipment lower valve box lower seal assembly pressure test mechanism according to claim 1, wherein: and a sealing ring is arranged between the connecting flange and the contact end surface of the lower sealing assembly.

3. The blast furnace equipment lower valve box lower seal assembly pressure test mechanism according to claim 2, wherein: the bottom of detection case is equipped with rag bolt to fix through rag bolt.