A crystallizer waterway pressure test tool

Abstract

The utility model provides a kind of crystallizer waterway pressure test tool, it is related to metallurgical continuous casting equipment technical field, including the flange matched with the pressure test blind plate of crystallizer waterway mouth, water injection hole and the screw hole a one-to-one correspondence of being equipped with on pressure test blind plate;Water injection hole is used to inject water into flange hole;The inner diameter size of screw hole b is same with the inner diameter size of counterbore on screw hole a, guide sleeve is equipped in screw hole b, and the inner diameter size of guide sleeve is same with the inner diameter size of screw hole a;Bolt is equipped in guide sleeve;The bolt is screwed with screw hole a by penetrating guide sleeve.The flange is tested together when pressure testing, after pressure testing is finished, bolt and guide sleeve are taken down one by one, screw is installed, flange does not displace in process, flange does not need secondary installation, reduce error probability and workload.The technical problems that flange cannot be detected actual sealing again after crystallizer waterway pressure testing in prior art, and sealing problem possibly existing in flange installation cannot be found are solved.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical continuous casting equipment technology, and in particular to a crystallizer water circuit pressure testing fixture. Background Technology

[0002] The slab continuous casting crystallizer assembly consists of a narrow-sided support arm and a wide-sided machining frame arranged opposite each other, a narrow-face copper plate and a back plate located inside the support arm, and a wide-face copper plate, a support plate, and a water tank located inside the machining frame. Its cooling water circuit includes two narrow-face cooling water circuits, two wide-face cooling water circuits, and four spray cooling water circuits.

[0003] At the bottom of a single-sided support arm, there is usually a set of inlet / outlet ports for a narrow-faced water tank, an inlet port for a wide-faced water tank, an outlet port for another wide-faced water tank, and inlets for two foot roller spray sections.

[0004] The previous pressure testing method involved not installing the inlet / outlet flanges before assembling the crystallizer assembly, but instead using blind flanges for pressure testing. After pressure testing, the blind flanges were removed, and the flanges used during operation were replaced. However, because the inlet / outlet is located at the bottom of the support arm, even when the support arm is placed on a vibrating table, the operating space is still limited. Flange installation requires at least two people: one for positioning and one for tightening. In production practice, based on this process design, the flanges were not actually pressure tested. Furthermore, during bottom-up installation, misalignment or damage to the sealing strips could go undetected. When the crystallizer assembly arrived at the factory, leaks were discovered after the inlet pipe was connected, necessitating the removal and reinstallation of the inlet pipe and flanges. This process was time-consuming, labor-intensive, and involved repetitive work for workers.

[0005] In view of the above, this utility model is hereby proposed. Utility Model Content

[0006] The purpose of this utility model is to provide a crystallizer water circuit pressure testing fixture to solve the technical problem in the prior art that the actual sealing condition of the flange cannot be detected after the crystallizer water circuit is pressure tested and then the flange is installed, so that possible sealing problems during flange installation cannot be detected.

[0007] In order to achieve the above-mentioned objectives of this utility model, the following technical solution is adopted: This utility model provides a crystallizer water circuit pressure testing fixture, including a pressure testing blind plate that matches the flange of the crystallizer water circuit inlet. The pressure testing blind plate is provided with a water injection hole and a screw hole that corresponds one-to-one with the screw hole a. The water injection hole is used to inject water into the flange hole; The inner diameter of the screw hole b is the same as the inner diameter of the countersunk hole in the screw hole a. A guide sleeve is provided inside the screw hole b, and the inner diameter of the guide sleeve is the same as the inner diameter of the screw hole a. A bolt is provided inside the guide sleeve. The bolt passes through the guide sleeve and is threadedly connected to the screw hole a.

[0008] Furthermore, the test pressure blind plate is provided with an annular sealing groove b corresponding to the flange hole, which is used to seal the gap between the test pressure blind plate and the flange hole.

[0009] Furthermore, a sealing strip is provided inside the annular sealing groove b.

[0010] Furthermore, the inner diameter of the annular sealing groove b is larger than the diameter of the flange hole.

[0011] Furthermore, the outer diameter of the annular sealing groove b is smaller than the straight-line distance from the test pressure blind center to the screw hole b.

[0012] Furthermore, the height of the guide is greater than the sum of the depth of screw hole b and the depth of the countersunk hole in screw hole a.

[0013] Furthermore, the guide sleeve includes a guide sleeve body and a coaxially arranged guide hole. The guide sleeve body is clearance-fitted with the screw hole b, and the guide hole is clearance-fitted with the bolt.

[0014] Furthermore, the guide sleeve body includes a guide section and a limiting section located at the upper end of the guide. The guide section is clearance-fitted with the screw hole b, and the outer diameter of the limiting section is larger than the inner diameter of the screw hole b.

[0015] This utility model provides a pressure testing fixture for the water circuit of a crystallizer. The pressure testing blind plate matches the flange at the inlet or outlet of the crystallizer's water circuit. The guide sleeve reduces the inner diameter of the bolt hole b, allowing the bolt shank to pass through, but not the nut. The bolt passes through the guide sleeve and is threaded into the bolt hole a on the flange, ensuring a tight fit between the pressure testing blind plate and the flange. If it is an inlet, water is injected into the flange hole through the injection hole; if it is an outlet, the injection hole can be sealed to complete the pressure test. After the pressure test is completed, the bolts and guide sleeves are removed one by one and replaced with screws that match the bolt holes. Using this pressure testing fixture, the pressure testing blind plate and flange can be installed before the crystallizer assembly is assembled. During the pressure test, the flange is tested together. After the pressure test, the bolts and guide sleeves are removed one by one and screws are installed. The flange will not shift during the process, and the flange does not need to be reinstalled, reducing the probability of errors and workload. This invention solves the technical problem in existing technologies where the flange is installed after the crystallizer water circuit is pressure tested, making it impossible to test the actual sealing of the flange, and where potential sealing problems during flange installation cannot be detected. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the crystallizer water circuit pressure testing fixture provided by this utility model; Figure 2 A schematic diagram of the structure of the test pressure blind plate provided by this utility model; Figure 3 This is a schematic diagram of the cross-sectional structure of the pressure testing fixture and flange assembly provided by this utility model; Figure 4 A schematic diagram of the guide sleeve structure provided by this utility model.

[0018] Icons: 1-Support arm; 11-Inlet / outlet; 2-Flange sealing strip; 3-Flange; 31-Flange hole; 32-Screw hole a; 33-Sealing groove a; 4-Screw; 5-Blind flange sealing strip; 6-Test pressure blind flange; 61-Screw hole b; 62-Sealing groove b; 63-Water injection hole; 7-Guide sleeve; 71-Guide sleeve body; 72-Guide hole; 8-Bolt; 81-Threaded rod. Detailed Implementation

[0019] Unless otherwise defined herein, the scientific and technical terms used in connection with this utility model shall have the meanings commonly understood by one of ordinary skill in the art. The meaning and scope of terms shall be clear; however, in any case of potential ambiguity, the definitions provided herein shall prevail over any dictionary or foreign definitions. In this application, unless otherwise stated, the use of "or" means "and / or". Furthermore, the use of the term "comprising" and other forms is non-limiting.

[0020] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this utility model, it should be noted that the terms "proximal end," "distal end," "front end," "rear end," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] The terms "horizontal" and "vertical" do not imply that a component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] This utility model provides a crystallizer water circuit pressure testing fixture, including a pressure testing blind plate 6 that matches the flange 3 of the crystallizer water circuit inlet. The pressure testing blind plate 6 is provided with a water injection hole 63 and a screw hole b 61 that corresponds one-to-one with screw hole a 32. The water injection hole 63 is used to inject water into the flange hole 31; the inner diameter of the screw hole b 61 is the same as the inner diameter of the countersunk hole in the screw hole a 32, and a guide sleeve 7 is provided in the screw hole b 61, the inner diameter of the guide sleeve 7 is the same as the inner diameter of the screw hole a 32. The guide sleeve 7 is provided with a bolt 8; the bolt 8 passes through the guide sleeve 7 and is threadedly connected to the screw hole a 32.

[0027] The pressure testing blind flange 6 is matched with flange 3 at the inlet or outlet of the crystallizer water circuit. The guide sleeve 7 reduces the inner diameter of the bolt hole b 61, allowing the bolt 8's threaded portion 81 to pass through, but the nut portion cannot pass through. The bolt 8 passes through the guide sleeve 7 and is threadedly connected to the bolt hole a 32 on the flange 3, ensuring a tight fit between the pressure testing blind flange 6 and the flange 3. If it is an inlet, water is injected into the flange hole 31 through the water injection hole 63; if it is an outlet, the water injection hole 63 can be sealed to complete the pressure test. After the pressure test is completed, the bolts 8 and guide sleeves 7 are removed one by one and replaced with screws 4, which are matched with the screws in bolt hole a 32. Using this pressure testing fixture, the pressure testing blind flange 6 and flange 3 can be installed in place before the crystallizer assembly is assembled. During the pressure test, the flange 3 is tested together. After the pressure test is completed, the bolts 8 and guide sleeves 7 are removed one by one and screws 4 are installed. During the process, the flange will not shift, and the flange does not need to be reinstalled, reducing the probability of errors and workload. This invention solves the technical problem in existing technologies where the flange is installed after the crystallizer water circuit is pressure tested, making it impossible to test the actual sealing of the flange, and where potential sealing problems during flange installation cannot be detected.

[0028] To further improve the sealing performance between the test pressure blind flange 6 and the flange 3, in some specific embodiments, the test pressure blind flange 6 is provided with an annular sealing groove b 62 corresponding to the flange hole 31, which is used to seal the gap between the test pressure blind flange 6 and the flange hole 31. In some specific embodiments, a blind flange sealing strip 5 is provided in the annular sealing groove b 62.

[0029] To differentiate the sealing effect, the size of the annular sealing groove b 62 needs to be defined. In some specific embodiments, the inner diameter of the annular sealing groove b 62 is larger than the diameter of the flange hole 31. In some specific embodiments, the outer diameter of the annular sealing groove b 62 is smaller than the straight-line distance from the center of the pressure test blind flange 6 to the bolt hole b 61.

[0030] To facilitate installation and disassembly, in some specific embodiments, the height of the guide sleeve 7 is greater than the sum of the depth of the screw hole b61 and the depth of the countersunk hole in the screw hole a32.

[0031] In some specific embodiments, the guide sleeve 7 includes a guide sleeve body 71 and a coaxially arranged guide hole 72. The guide sleeve body 71 is clearance-fitted with the threaded hole b61, and the guide hole 72 is clearance-fitted with the bolt 8. In some specific embodiments, the guide sleeve body 71 includes a guide section and a limiting section located at the upper end of the guide section. The guide section is clearance-fitted with the threaded hole, and the outer diameter of the limiting section is larger than the inner diameter of the threaded hole b61.

[0032] The present invention will be further illustrated below through embodiments. Unless otherwise specified, the materials in the embodiments are prepared according to existing methods or purchased directly from the market.

[0033] Example Combination Figures 1-4 As explained, this embodiment provides a crystallizer water circuit pressure testing fixture.

[0034] The continuous casting crystallizer assembly is composed of two narrow-face assemblies and two wide-face assemblies arranged opposite each other. The narrow-face copper plate and the back plate are fixed to the support arm by bolts to form the narrow-face assembly, while the wide-face copper plate, the support plate, and the water tank are fixed to the processing frame by bolts to form the wide-face assembly. The two wide-face assemblies are fixedly installed by the left and right support arms arranged on the left and right sides respectively.

[0035] like Figure 1 As shown, the bottom of a single support arm 1 is equipped with 6 water inlets / outlets, including a set of inlets / outlets for a narrow-faced water tank, an inlet for a wide-faced water tank, an outlet for another wide-faced water tank, and two inlets for the foot roller section spray. The narrow-faced water tank is responsible for cooling the narrow-faced copper plate, and the wide-faced water tank is responsible for cooling the wide-faced copper plate. The two spray water systems are responsible for cooling the narrow-faced foot roller section and the wide-faced foot roller section, respectively. The above-mentioned water tanks and their associated water circuits are independent of each other and do not interfere with each other. After the crystallizer assembly is assembled, each water circuit needs to be pressure tested.

[0036] The bottom of a single support arm 1 requires 6 test blind plates 6 of 3 different sizes. The shape and size of the test blind plates 6 at different locations are adapted to the corresponding flanges 3.

[0037] like Figure 3 As shown, the middle area of ​​flange 3 is flange hole 31, the size of flange hole 31 matches the inlet / outlet 11, and an annular sealing groove a33 is provided on the side of flange 3 facing support arm 1. The inner diameter of sealing groove a33 is larger than the diameter of flange hole 31, and flange sealing strip 2 is provided in sealing groove a33.

[0038] like Figure 2 and Figure 3 As shown, screw holes b61 are provided at the four corners of the test pressure blind plate 6. The axis of screw hole b61 coincides with the axis of screw hole a32 of flange 3. Screw hole a32 is a countersunk hole, and screw hole b61 is a through hole with the same hole diameter as the upper hole diameter of screw hole a32. An annular sealing groove b62 is provided on the side of the test pressure blind plate 6 facing the flange 3. The inner diameter of the sealing groove b62 is larger than the diameter of the flange hole 31, and the outer diameter is smaller than the straight distance from the center of the test pressure blind plate 6 to the bolt hole b61. A blind plate sealing strip 5 is provided in the sealing groove b62.

[0039] like Figure 3 and Figure 4As shown, the guide sleeve body 71 has a clearance fit with the screw hole b61, and the guide hole 72 has a clearance fit with the bolt 8. The diameter of the screw 81 is the same as the screw diameter of the screw 4 used to fix the flange 3. The guide sleeve body 71 includes a guide section and a limiting section located at the upper end of the guide section. The guide section has a clearance fit with the screw hole, and the outer diameter of the limiting section is larger than the inner diameter of the screw hole b61.

[0040] When using a pressure test blind flange 6 at the water inlet, a water injection hole 63 is set at the center of the pressure test blind flange 6. Correspondingly, the water injection hole 63 of the pressure test blind flange 6 used at the water outlet of the water circuit needs to be sealed with a plug.

[0041] Working principle: like Figure 1 As shown, before assembling the crystallizer assembly, the flange sealing strip 2 is installed into the flange sealing groove a33, and the blind plate sealing strip 5 is placed into the test pressure blind plate sealing groove b62. The bolts 8 pass through the guide sleeve 7, the screw hole b61, and the screw hole a32 to fix the test pressure blind plate 6 and the flange 3 to the inlet / outlet 11 at the bottom of the support arm 1. At this time, the screws 4 used to fix the flange 3 are placed aside for later use.

[0042] After the crystallizer assembly is completed, pressure tests are performed on the wide-face water tank, narrow-face water tank, and spray water circuits one by one. One end of a water circuit is designated as the inlet, and the other end as the outlet. The outlet of the pressure test blind flange is sealed with a plug. After confirming the water circuit is properly sealed, one bolt 8 and guide sleeve 7 are removed, and screw 4 is installed. This process is repeated for each of the four bolts 8 and guide sleeves 7 securing the pressure test blind flange 6, and four screws 4 are installed to secure the flange. During this process, the flange and flange sealing strip will not shift. One person can complete the pressure test, reducing labor intensity and eliminating the risk of flange leakage after pressure testing.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A crystallizer water circuit pressure testing fixture, characterized in that, Includes a test pressure blind plate (6) that matches the flange (3) of the crystallizer water inlet, the test pressure blind plate (6) having a water injection hole (63) and a screw hole (61) that corresponds one-to-one with screw hole a (32); The water injection hole (63) is used to inject water into the flange hole (31); The inner diameter of the screw hole b (61) is the same as the inner diameter of the countersunk hole in the screw hole a (32). The screw hole b (61) is provided with a guide sleeve (7), the inner diameter of the guide sleeve (7) is the same as the inner diameter of the screw hole a (32). The guide sleeve (7) is provided with a bolt (8). The bolt (8) passes through the guide sleeve (7) and is threadedly connected to the screw hole a (32).

2. The pressure testing fixture according to claim 1, characterized in that, The test pressure blind plate (6) is provided with an annular sealing groove b (62) corresponding to the flange hole (31) to seal the gap between the test pressure blind plate (6) and the flange hole (31).

3. The pressure testing fixture according to claim 2, characterized in that, A sealing strip (5) is provided inside the annular sealing groove b (62).

4. The pressure testing fixture according to claim 3, characterized in that, The inner diameter of the annular sealing groove b (62) is larger than the diameter of the flange hole (31).

5. The pressure testing fixture according to claim 4, characterized in that, The outer diameter of the annular sealing groove b (62) is smaller than the straight-line distance from the center of the test pressure blind plate (6) to the screw hole b (61).

6. The pressure testing fixture according to any one of claims 1 to 5, characterized in that, The height of the guide sleeve (7) is greater than the sum of the depth of the screw hole b (61) and the depth of the countersunk hole in the screw hole a (32).

7. The pressure testing fixture according to claim 6, characterized in that, The guide sleeve (7) includes a guide sleeve body (71) and a guide hole (72) arranged coaxially. The guide sleeve body (71) is clearance-fitted with the screw hole b (61), and the guide hole (72) is clearance-fitted with the bolt (8).

8. The pressure testing fixture according to claim 7, characterized in that, The guide sleeve body (71) includes a guide section and a limiting section located at the upper end of the guide section. The guide section is clearance-fitted with the screw hole b (61), and the outer diameter of the limiting section is larger than the inner diameter of the screw hole b (61).

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