A pressure testing mechanism and method for dense assembly of blast furnace equipment

Abstract

The present invention belongs to the technical field of blast furnace equipment, and relates to a pressure test detection mechanism and method for a sealing assembly on blast furnace equipment. The pressure test detection mechanism for the sealing assembly on blast furnace equipment is used to perform sealing detection. The pressure test detection mechanism includes a detection box, wherein an air cavity for pressure testing is provided in the detection box; a mounting hole is provided on one side of the detection box; a connecting flange is provided on the mounting hole for installing an upper sealing assembly; an air intake pipe communicating with the air cavity is provided on the other side of the detection box, and a pressure gauge and a valve are provided on the air intake pipe; the upper sealing assembly is installed on the mounting hole and is sealed to the side wall of the detection box; by applying pressure to the air cavity, dynamic and static detection is performed on each sealing point of the upper sealing assembly. The pressure test detection mechanism in the present invention realizes sealing detection of the upper sealing assembly before assembly, which can improve the safety of the upper sealing assembly, reduce the failure rate, improve production efficiency, and reduce the maintenance downtime rate.

Description

Technical Field

[0001] The invention belongs to the technical field of blast furnace equipment and relates to a pressure testing mechanism and method for a dense assembly of blast furnace equipment. Background Art

[0002] The blast furnace upper seal assembly refers to a sealed valve assembly used in the upper part of the blast furnace, primarily for airtight control during processes such as gas and slag injection. The upper seal assembly is a critical piece of blast furnace equipment, and its quality is crucial to smooth production. Currently, it is often used without prior testing, resulting in uncertainty about its sealing performance. During production, the upper seal assembly must withstand the pressure within the blast furnace, which contains gases such as coal gas and nitrogen. Leakage can be hazardous. To eliminate safety hazards and improve the equipment's sealing performance, the upper seal assembly must be tested for leaks before assembly to ensure safety during use. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to solve the problem of sealing detection of the upper sealing assembly of a blast furnace and to provide a pressure test detection mechanism and method for the upper sealing assembly of blast furnace equipment.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] A pressure test mechanism for an upper sealing assembly of blast furnace equipment comprises a test box, wherein an air cavity for pressure testing is provided in the test box; a mounting hole is provided on one side of the test box; a connecting flange is provided on the mounting hole for mounting an upper sealing assembly; an air intake pipe communicating with the air cavity is provided on the other side of the test box, and a pressure gauge and a valve are provided on the air intake pipe; the upper sealing assembly is mounted on the mounting hole and is sealed to the side wall of the test box; and each sealing point of the upper sealing assembly is tested by applying pressure to the air cavity.

[0006] Furthermore, the air cavity in the detection box is divided into a first air cavity and a second air cavity which are independent of each other by a partition; the first air cavity and the second air cavity are each provided with an air inlet pipe, and the air inlet pipe is provided with a pressure gauge and a valve;

[0007] The sealing points of the upper seal assembly are divided into inner hole side sealing points and outer circle side sealing points with the shaft as the boundary; the first air cavity is connected to the inner hole of the upper seal assembly and is used to detect the inner hole side sealing point; the second air cavity is connected to the outer circle side of the shaft of the upper seal assembly and is used to detect the outer circle side sealing point of the shaft.

[0008] Furthermore, a separation sealing ring is provided between the connecting flange and the upper seal assembly to separate the sealing point on the inner hole side from the sealing point on the outer circle side of the shaft.

[0009] Furthermore, a plurality of vent holes are provided on the connecting flange, and the second air cavity is communicated with the outer circumferential side of the shaft of the upper seal assembly through the vent holes.

[0010] Furthermore, the bottom of the detection box is provided with anchor bolts and is fixed by the anchor bolts.

[0011] A method for pressure testing a sealing assembly on blast furnace equipment, which uses the pressure testing mechanism for sealing an assembly on blast furnace equipment to perform a sealing test, comprises the following steps:

[0012] 1) Install the upper seal assembly on the connecting flange, and separate the sealing points of the upper seal assembly into the inner hole side sealing point and the shaft outer circle side sealing point with the shaft as the boundary through the separation sealing ring;

[0013] 2) Static pressure test: Add compressed air into the air cavity through the air inlet pipe, control the pressure at 1.5 to 2 times the working pressure, close the valve, maintain the pressure for 30 minutes, and test the sealing points on the inner hole side and the outer circle side of the shaft respectively to see if the pressure value on the pressure gauge drops;

[0014] 3) Dynamic pressure detection: The air cavity pressure is maintained at 1.5 to 2 times the working pressure. When detecting the inner hole side sealing point, the tilting cylinder of the upper seal assembly is driven to reciprocate in the hole to detect the sealing performance of the inner hole side sealing point in the moving state; when detecting the outer circle side sealing point of the shaft, the rotating cylinder of the upper seal assembly is driven to rotate 90° back and forth to detect the sealing performance of the outer circle side sealing point in the moving state.

[0015] Furthermore, the test pressure during the testing process shall not exceed 10MPa.

[0016] Furthermore, during the sealing detection process, the presence and location of leakage can be determined by listening to sounds, applying grease, and using detergent water.

[0017] Furthermore, during the test, if the pressure on the barometer does not drop, the test is qualified; otherwise, the test is unqualified and the leak point is repaired.

[0018] The beneficial effects of the present invention are:

[0019] The pressure test detection mechanism in the present invention realizes the sealing detection of the upper seal assembly before assembly, which can improve the safety of the upper seal assembly, reduce the failure rate, improve production efficiency, and reduce the maintenance downtime rate.

[0020] Other advantages, objects, and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art upon examination of the following description or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below with reference to the accompanying drawings, in which:

[0022] Figure 1 It is a schematic diagram of the pressure test detection mechanism of the upper dense assembly of the blast furnace equipment in the present invention.

[0023] Figure 2 for Figure 1 A partial enlarged view of the middle vent.

[0024] Marking instructions: 1 to 7 are the sealing points on the outer circle side of the shaft; 8 and 9 are the sealing points on the inner hole side; 10-test box; 11-inlet pipe; 12-pressure gauge; 13-valve; 14-base plate; 15-anchor bolt; 16-connecting bolt; 17-herringbone arm; 18-rotating cylinder; 19-tilting cylinder; 20-connecting flange; 21-second air cavity; 22-first air cavity; 23-partitioning sealing ring; 24-vent; 25-inlet pipe; 26-pressure gauge; 27-valve; 28 to 32 are partitions. DETAILED DESCRIPTION

[0025] The following describes the embodiments of the present invention by means of specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0026] Among them, the accompanying drawings are only for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting the present invention. In order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the dimensions of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the accompanying drawings.

[0027] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0028] See also Figures 1-2 , which is a pressure test detection mechanism for the upper sealing assembly of blast furnace equipment, including a detection box 10, in which an air cavity for pressure testing is provided; a mounting hole is provided on one side of the detection box 10; a connecting flange 20 is installed on the mounting hole, and the upper sealing assembly is fixedly mounted on the connecting flange 20 by connecting bolts 16; an air intake pipe communicating with the air cavity is provided on the other side of the detection box 10, and a pressure gauge and a valve are provided on the air intake pipe; the upper sealing assembly is mounted on the mounting hole and is sealed with the side wall of the detection box 10; each sealing point of the upper sealing assembly is tested by pressurizing the air cavity.

[0029] Among them, the air cavity in the detection box 10 is divided into a first air cavity 22 and a second air cavity 21 which are independent of each other by partitions 28, 29, 30, 31 and 32 welded in the detection box 10; an air intake pipe 11, a pressure gauge 12 and a valve 13 are installed on one side of the first air cavity 22, and an air intake pipe 25, a pressure gauge 26 and a valve 27 are installed on one side of the second air cavity 21; the sealing points of the upper seal assembly are divided into shaft outer circle side sealing point 1, shaft outer circle side sealing point 2, shaft outer circle side sealing point 3, shaft outer circle side sealing point 4, shaft outer circle side sealing point 5, shaft outer circle side sealing point 6, shaft outer circle side sealing point 7, inner hole side sealing point 8 and inner hole side sealing point 9 with the axis as the boundary, a separating sealing ring 23 is provided between the connecting flange 20 and the upper seal assembly to separate the inner hole side sealing point from the shaft outer circle side sealing point, and the herringbone crank arm 17 of the upper seal assembly extends into the first air cavity 22. The first air cavity 22 is communicated with the inner hole of the upper seal assembly and is used to detect the inner hole side sealing point 8 and the inner hole side sealing point 9; the second air cavity 21 is communicated with the outer circle side of the shaft of the upper seal assembly and is used to detect the outer circle side sealing point 1, the outer circle side sealing point 2, the outer circle side sealing point 3, the outer circle side sealing point 4, the outer circle side sealing point 5, the outer circle side sealing point 6, and the outer circle side sealing point 7.

[0030] A plurality of vent holes 24 are provided on the connecting flange 20 , and the second air cavity 21 is communicated with the outer circumferential side of the shaft of the upper seal assembly through the vent holes 24 .

[0031] The bottom plate 14 of the detection box 10 is installed with anchor bolts 15 and is fixed by the anchor bolts 15 .

[0032] A method for pressure testing a sealing assembly on blast furnace equipment is provided, wherein the sealing assembly pressure testing mechanism on blast furnace equipment of the present embodiment is used to perform sealing detection, and the method comprises the following steps:

[0033] 1) Install the upper seal assembly on the connecting flange 20, and separate the sealing points of the upper seal assembly into the inner hole side sealing point and the shaft outer circle side sealing point with the shaft as the boundary through the separation seal ring 23;

[0034] 2) Static pressure test: Add compressed air into the air cavity through the air inlet pipe, control the pressure at 1.5 to 2 times the working pressure, close the valve, maintain the pressure for 30 minutes, and test the outer circle side sealing points 1, 2, 3, 4, 5, 6, 7, inner hole side sealing points 8 and 9 respectively to see if the pressure value on the pressure gauge drops;

[0035] 3) Dynamic pressure detection: The air cavity pressure is maintained at 1.5 to 2 times the working pressure. When detecting the inner hole side sealing point 8 and the inner hole side sealing point 9, the tilting cylinder 19 of the upper sealing assembly is driven to reciprocate in the hole to detect the sealing performance of the inner hole side sealing point in the moving state; when detecting the shaft outer circle side sealing point 1, the shaft outer circle side sealing point 2, the shaft outer circle side sealing point 3, the shaft outer circle side sealing point 4, the shaft outer circle side sealing point 5, the shaft outer circle side sealing point 6, and the shaft outer circle side sealing point 7, the rotary cylinder 18 of the upper sealing assembly is driven to rotate back and forth 90° to detect the sealing performance of the shaft outer circle side sealing point in the moving state.

[0036] During the seal test, the presence and location of leaks are determined by listening, applying grease, and washing powder water. If the pressure on the barometer does not drop during the test, the test is qualified; otherwise, it fails and the leak point is repaired.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions, which should all be included in the scope of the claims of the present invention.

Claims

1. A pressure test mechanism for a dense assembly of blast furnace equipment, characterized by: The apparatus comprises a test box, wherein an air cavity for pressure testing is provided in the test box; a mounting hole is provided on one side of the test box; a connecting flange is provided on the mounting hole for mounting an upper seal assembly; an air intake pipe communicating with the air cavity is provided on the other side of the test box, and a pressure gauge and a valve are provided on the air intake pipe; the upper seal assembly is mounted on the mounting hole and is sealed to the side wall of the test box; each sealing point of the upper seal assembly is tested by applying pressure to the air cavity; The air cavity in the detection box is divided into a first air cavity and a second air cavity which are independent of each other by a partition; the first air cavity and the second air cavity are each provided with an air inlet pipe, and the air inlet pipe is provided with a pressure gauge and a valve; The sealing points of the upper seal assembly are divided into inner hole side sealing points and outer circle side sealing points with the shaft as the boundary; the first air cavity is connected to the inner hole of the upper seal assembly and is used to detect the inner hole side sealing point; the second air cavity is connected to the outer circle side of the shaft of the upper seal assembly and is used to detect the outer circle side sealing point of the shaft; A separation sealing ring is provided between the connecting flange and the upper seal assembly to separate the sealing point on the inner hole side from the sealing point on the outer circle side of the shaft; a plurality of vent holes are provided on the connecting flange, and the second air cavity is connected to the outer circle side of the shaft of the upper seal assembly through the vent holes.

2. The pressure testing mechanism for the dense assembly of blast furnace equipment according to claim 1, characterized in that: The bottom of the detection box is provided with anchor bolts and is fixed by the anchor bolts.

3. A pressure test method for a dense assembly of blast furnace equipment, characterized in that: The sealing test is performed using the sealing assembly pressure testing mechanism for blast furnace equipment according to any one of claims 1 to 2, comprising the following steps: 1) Install the upper seal assembly on the connecting flange, and use the separation seal ring to separate the sealing point of the upper seal assembly into the inner hole side sealing point and the shaft outer circle side sealing point with the shaft as the boundary; 2) Static pressure test: Add compressed air into the air cavity through the air inlet pipe, control the pressure at 1.5 to 2 times the working pressure, close the valve, maintain the pressure for 30 minutes, and test the sealing points on the inner hole side and the outer circle side of the shaft respectively to see if the pressure value on the pressure gauge drops; 3) Dynamic pressure detection: The air cavity pressure is maintained at 1.5 to 2 times the working pressure. When detecting the inner hole side sealing point, the tilting cylinder of the upper seal assembly is driven to reciprocate in the hole to detect the sealing performance of the inner hole side sealing point in the moving state; when detecting the outer circle side sealing point of the shaft, the rotating cylinder of the upper seal assembly is driven to rotate 90° back and forth to detect the sealing performance of the outer circle side sealing point in the moving state.

4. The method for pressure testing of a dense assembly on blast furnace equipment according to claim 3, characterized in that: During the sealing test, the presence and location of leakage are determined by listening to the sound, applying grease, and using detergent water.

5. The method for pressure testing of a dense assembly of blast furnace equipment according to claim 3, characterized in that: During the test, if the pressure on the pressure gauge does not drop, it is qualified; otherwise, it is unqualified and the leak point should be repaired.

6. The method for pressure testing of the dense assembly of blast furnace equipment according to claim 3, characterized in that: The test pressure during the testing process shall not exceed 10MPa.

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