Temperature-resistant and pressure-resistant check valve for metallurgical system

Abstract

The invention relates to the technical field of self-closing valves, and particularly discloses a temperature-resistant and pressure-resistant check valve for a metallurgical system, which comprises a valve body, an air inlet pipe and an air outlet pipe are symmetrically and fixedly connected in the valve body, a check assembly is arranged in the valve body, and the check assembly comprises a first connecting seat and a second connecting seat which are symmetrically and fixedly connected in the valve body. The first connecting base is located at the end, close to the air inlet pipe, in the valve body, the second connecting base is located at the end, close to the air outlet pipe, in the valve body, and a mounting mechanism and a non-return mechanism are arranged on the first connecting base. When gas enters the valve body through the gas inlet pipe, the wedge-shaped block is pushed, so that the sliding sleeve and the clamping seat are separated from clamping and rotate under the pushing of the gas, and the gas inlet pipe and the gas outlet pipe are communicated. After the gas is added, the sealing plate is reset, the sliding sleeve is clamped with the clamping seat, one end of the gas inlet pipe is sealed, negative pressure is prevented from driving the sliding sleeve to communicate the gas inlet pipe with the gas outlet pipe, the metallurgical pressure environment is ensured to be stable, and the metallurgical quality and safety are improved.

Description

Technical Field

[0001] The invention relates to the technical field of self-closing valves, and in particular to a temperature-resistant and pressure-resistant check valve for a metallurgical system. Background Art

[0002] In the metallurgical industry, oxygen is an indispensable gas in many key process links. For example, it plays a vital role in the oxygen-enriched blast process of blast furnaces in ironmaking and the oxygen blowing process of converters in steelmaking. Installing a temperature-resistant and pressure-resistant check valve on the oxygen delivery pipeline can accurately control the flow direction of oxygen, ensuring its one-way entry into the blast furnace or converter, and effectively avoiding the occurrence of dangerous situations such as oxygen backflow.

[0003] In the process of metallurgical operations, precise control of oxygen supply is crucial because it is directly related to the pressure conditions required for metallurgy. The check valve currently used has a relatively simple structure and only has a one-way control function. In the metallurgical process, once a negative pressure condition occurs, the check valve may open under the action of negative pressure, causing external air to be sucked into the metallurgical process. This will destroy the pressure environment required for metallurgy, thereby causing a decline in the quality of metallurgical products. In severe cases, it may even cause safety accidents, causing great harm to the entire metallurgical production process.

[0004] Therefore, it is necessary to provide a temperature-resistant and pressure-resistant check valve for a metallurgical system to solve the above problems. Summary of the invention

[0005] The main purpose of the present invention is to provide a temperature-resistant and pressure-resistant check valve for a metallurgical system, which can effectively solve the problems in the background technology.

[0006] To achieve the above object, the technical solution adopted by the present invention is: A temperature-resistant and pressure-resistant check valve for a metallurgical system, comprising a valve body, an air inlet pipe and an air outlet pipe being symmetrically fixedly connected inside the valve body, a check assembly being arranged inside the valve body, the check assembly comprising a connecting seat 1 and a connecting seat 2 being symmetrically fixedly connected to the valve body, the connecting seat 1 being located at one end of the valve body close to the air inlet pipe, the connecting seat 2 being located at one end of the valve body close to the air outlet pipe, a mounting mechanism and a check mechanism being arranged on the connecting seat 1, and a clamping seat being fixedly connected to one side of the connecting seat 1 close to the connecting seat 2; The non-return mechanism includes a sealing plate, a wedge block and a sliding sleeve. The wedge block is fixedly connected to a sliding seat via a slider. A push rod is rotatably connected between the sliding seat and the sliding sleeve. A reset mechanism is provided between the push rod and the sealing plate. A guide block is symmetrically fixedly connected inside the sliding sleeve, and a push block is fixedly connected inside the connecting seat 2.

[0007] As a further improvement of the above scheme, a maintenance assembly is provided on the top of the valve body, and the maintenance assembly includes a connecting pipe fixedly connected to the valve body, the outer side of the connecting pipe is fixedly connected to a fixing seat, the inner wall of the fixing seat is evenly fixedly connected to a clamping sleeve, the interior of the fixing seat is rotatably connected to a sealing cover, the outer side of the sealing cover is evenly fixedly connected to a clamping block, and the clamping blocks are slidably connected to the inside of the clamping sleeve.

[0008] As a further improvement of the above scheme, the mounting mechanism includes a mounting block installed inside a connecting seat by bolts, the outer wall of the mounting block is fixedly connected to a mounting sleeve, the interior of the mounting sleeve is rotatably connected to a movable block, the outer wall of the movable block is fixedly connected to the connecting block, and the sealing plate is fixedly installed on the outside of the connecting block.

[0009] As a further improvement of the above scheme, the reset mechanism includes a mounting seat slidably connected to the inside of the sealing plate, a fixing plate is fixedly connected to the outer wall of the mounting seat, the inside of the sliding sleeve is slidably connected to the mounting plate, and a spring is fixedly connected between the fixing plate and the mounting plate.

[0010] As a further improvement of the above solution, an inclined surface is arranged at one end of the sliding sleeve close to the clamping seat, and a clamping groove matched with the sliding sleeve is arranged at the top of the clamping seat.

[0011] As a further improvement of the above solution, the push block consists of a rectangular block and a round shaft, and the push block is slidably connected between two guide blocks.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. When the gas enters the valve body through the inlet pipe, the wedge block is pushed to disengage the sleeve from the card seat, and the sleeve rotates under the push of the gas to connect the inlet pipe and the outlet pipe. After the gas is added, the sealing plate is reset, the sleeve is connected to the card seat, and one end of the inlet pipe is sealed to prevent the negative pressure from driving the sleeve to connect the inlet pipe and the outlet pipe, thereby ensuring the stability of the metallurgical pressure environment and improving the metallurgical quality and safety.

[0013] 2. Use the inspection assembly to open the top of the valve body, remove the check mechanism from the valve body through the installation mechanism, and replace the reset mechanism to ensure the reset stability of the check mechanism, prevent the safety of the check mechanism from being endangered due to loss, and complete the overall inspection of the valve body conveniently and efficiently to ensure safe use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the non-return assembly of the present invention; Figure 3 It is a structural schematic diagram of the mounting mechanism and the non-return mechanism of the present invention; Figure 4 It is a schematic diagram of the internal structure of the valve body of the present invention; Figure 5 It is a structural schematic diagram of the sealing plate of the present invention; Figure 6 It is a schematic diagram of the internal structure of the sealing plate of the present invention; Figure 7 It is a schematic diagram of the local structure of the sliding sleeve of the present invention; Figure 8 It is a schematic diagram of the local structure of the valve body of the present invention when it is opened; Fig. 9 It is a structural schematic diagram of the fixing seat of the present invention.

[0016] In the figure: 1. valve body; 2. air inlet pipe; 3. air outlet pipe; 4. maintenance assembly; 41. connecting pipe; 42. fixing seat; 43. sealing cover; 44. ferrule; 45. clamping block; 5. non-return assembly; 51. connecting seat 1; 52. connecting seat 2; 53. mounting mechanism; 531. mounting block; 531. mounting sleeve; 533. movable block; 534. connecting block; 54. non-return mechanism; 541. sealing plate; 542. wedge block; 543. sliding sleeve; 544. sliding seat; 545. push rod; 546. guide block; 547. push block; 548. slider; 55. clamping seat; 56. reset mechanism; 561. mounting seat; 562. spring; 563. fixing plate; 564. mounting plate. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figures 1 to 9As shown, the present invention provides an embodiment: a temperature-resistant and pressure-resistant check valve for a metallurgical system, comprising a valve body 1, wherein an air inlet pipe 2 and an air outlet pipe 3 are symmetrically fixedly connected inside the valve body 1, a check assembly 5 is arranged inside the valve body 1, and the check assembly 5 comprises a connecting seat 1 51 and a connecting seat 2 52 symmetrically fixedly connected inside the valve body 1, the connecting seat 1 51 is located at one end of the valve body 1 close to the air inlet pipe 2, the connecting seat 2 52 is located at one end of the valve body 1 close to the air outlet pipe 3, a mounting mechanism 53 and a check mechanism 54 are arranged on the connecting seat 1 51, and a clamping seat 55 is fixedly connected to one side of the connecting seat 1 51 close to the connecting seat 2 52; The non-return mechanism 54 includes a sealing plate 541, a wedge block 542 and a sliding sleeve 543. The wedge block 542 is fixedly connected to a sliding seat 544 via a slider 548. A push rod 545 is rotatably connected between the sliding seat 544 and the sliding sleeve 543. A reset mechanism 56 is provided between the push rod 545 and the sealing plate 541. A guide block 546 is symmetrically fixedly connected inside the sliding sleeve 543. A push block 547 is fixedly connected inside the connecting seat 52. An inclined surface is provided at one end of the sliding sleeve 543 close to the clamping seat 55, and a clamping groove matching with the sliding sleeve 543 is provided at the top of the clamping seat 55; The push block 547 is composed of a rectangular block and a circular shaft, and the push block 547 is slidably connected between the two guide blocks 546 .

[0019] In practical application, the embodiment of the present invention is as follows: Figures 2 to 8 As shown, when gas enters the valve body 1 from the air inlet pipe 2, the airflow pushes the wedge block 542 to move, and the wedge block 542 drives the slider 548 and the slide seat 544. The slide seat 544 moves the sleeve 543 through the push rod 545. The sleeve 543 can be disengaged from the clamping seat 55 during the movement. At the same time, the gas pushes the sealing plate 541 to rotate, so that the air inlet pipe 2 and the air outlet pipe 3 are connected, and the gas can pass through. When the gas is added, the sealing plate 541 returns to the initial position under the action of its own gravity and the reset mechanism 56, and drives the sleeve 543 to clamp with the clamping seat 55 through the inclined surface, thereby sealing one end of the air inlet pipe 2. Even if negative pressure occurs, it can effectively prevent air from entering, ensure the stability of the metallurgical pressure environment, and ensure metallurgical quality and safety. The sealing plate 541 can be pushed by the gas through the clamping of the guide blocks 546 and 547 to achieve the following Figure 4 and Figure 8 The clamping connection in the form prevents the sealing plate 541 from affecting the entry of gas; like Figure 3 and Fig. 9As shown, the top of the valve body 1 can be opened through the inspection component 4, and the check mechanism 54 can be removed from the valve body 1 using the installation mechanism 53. Replacing the reset mechanism 56 can ensure the stability of the reset of the check mechanism 54, avoid the loss caused by long-term use affecting the safety of the check mechanism 54, and realize convenient and efficient maintenance of the valve body 1.

[0020] like Fig. 9 As shown, a maintenance component 4 is provided on the top of the valve body 1, and the maintenance component 4 includes a connecting pipe 41 fixedly connected to the valve body 1, a fixing seat 42 is fixedly connected to the outer side of the connecting pipe 41, a clamping sleeve 44 is evenly fixedly connected to the inner wall of the fixing seat 42, a sealing cover 43 is rotatably connected to the inside of the fixing seat 42, a clamping block 45 is evenly fixedly connected to the outer side of the sealing cover 43, and the clamping block 45 is slidably connected to the inside of the clamping sleeve 44.

[0021] In actual application of the embodiment of the present invention, when it is necessary to inspect the inside of the valve body 1, the sealing cover 43 is rotated to make the block 45 on the outside of the sealing cover 43 slide in the sleeve 44 until the engagement state of the block 45 and the sleeve 44 is released, so that the sealing cover 43 can be opened, and the inside of the valve body 1 can be inspected through the connecting pipe 41. After the inspection is completed, the sealing cover 43 is rotated back to the initial position, and the block 45 is re-engaged with the sleeve 44 to achieve sealing, thereby ensuring the sealing of the valve body 1 and ensuring that the normal operation of the check valve is not disturbed by the external environment.

[0022] like Figure 5 and Figure 6 As shown, the mounting mechanism 53 includes a mounting block 531 installed inside the connecting seat 51 by bolts, the outer wall of the mounting block 531 is fixedly connected to a mounting sleeve 532, the interior of the mounting sleeve 532 is rotatably connected to a movable block 533, the outer wall of the movable block 533 is fixedly connected to a connecting block 534, and a sealing plate 541 is fixedly installed on the outer side of the connecting block 534.

[0023] In actual application of the embodiment of the present invention, when the gas pushes the sealing plate 541 to move, the sealing plate 541 drives the connecting block 534, and the connecting block 534 causes the movable block 533 to rotate in the mounting sleeve 532, thereby realizing the flexible rotation of the sealing plate 541, thereby effectively controlling the connection and closing of the air inlet pipe 2 and the air outlet pipe 3; Among them, the design of the mounting mechanism 53 utilizes the rotational connection between the movable block 533 and the mounting sleeve 532 to provide a stable and reasonable mechanical structure for the movement of the sealing plate 541, thereby ensuring the normal operation of the check valve under complex working conditions of the metallurgical system and ensuring the accuracy and reliability of gas flow control. At the same time, the mounting block 531 installed by bolts is easy to install and disassemble, which is beneficial to the maintenance and inspection of the check valve.

[0024] like Figure 6 and Figure 7As shown, the reset mechanism 56 includes a mounting seat 561 slidably connected to the inside of the sealing plate 541, a fixing plate 563 is fixedly connected to the outer wall of the mounting seat 561, a mounting plate 564 is slidably connected to the inside of the sliding sleeve 543, and a spring 562 is fixedly connected between the fixing plate 563 and the mounting plate 564.

[0025] In actual application of the embodiment of the present invention, when the gas pushes the sealing plate 541 to rotate, so that the inlet pipe 2 and the outlet pipe 3 are connected, and the gas addition is completed, under the elastic force of the spring 562, the spring 562 will pull the fixing plate 563 and the mounting seat 561 connected thereto, thereby driving the sealing plate 541 to reset. At the same time, the mounting plate 564 slides in the sliding sleeve 543, providing stable support and guidance for the expansion and contraction of the spring 562, ensuring that the sealing plate 541 can accurately return to the initial position, ensuring the sealing of the check valve when closed, and then maintaining the stability of the pressure environment in the metallurgical system, ensuring the smooth progress of the metallurgical process, and effectively improving the working performance and stability of the check valve.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A temperature-resistant and pressure-resistant check valve for a metallurgical system, comprising a valve body (1), wherein an air inlet pipe (2) and an air outlet pipe (3) are symmetrically and fixedly connected inside the valve body (1), characterized in that: A check assembly (5) is provided inside the valve body (1), and the check assembly (5) comprises a connection seat 1 (51) and a connection seat 2 (52) which are symmetrically fixedly connected to the valve body (1), the connection seat 1 (51) being located at one end of the valve body (1) close to the air inlet pipe (2), and the connection seat 2 (52) being located at one end of the valve body (1) close to the air outlet pipe (3), the connection seat 1 (51) being provided with a mounting mechanism (53) and a check mechanism (54), and a clamping seat (55) being fixedly connected to a side of the connection seat 1 (51) close to the connection seat 2 (52); The non-return mechanism (54) comprises a sealing plate (541), a wedge block (542) and a sliding sleeve (543); the wedge block (542) is fixedly connected to a sliding seat (544) via a slider (548); a push rod (545) is rotatably connected between the sliding seat (544) and the sliding sleeve (543); a reset mechanism (56) is provided between the push rod (545) and the sealing plate (541); a guide block (546) is symmetrically fixedly connected inside the sliding sleeve (543); and a push block (547) is fixedly connected inside the connecting seat 2 (52).

2. The temperature-resistant and pressure-resistant check valve for metallurgical system according to claim 1, characterized in that: A maintenance component (4) is provided on the top of the valve body (1), and the maintenance component (4) comprises a connecting pipe (41) fixedly connected to the valve body (1); a fixing seat (42) is fixedly connected to the outer side of the connecting pipe (41); a clamping sleeve (44) is evenly fixedly connected to the inner wall of the fixing seat (42); a sealing cover (43) is rotatably connected to the inside of the fixing seat (42); a clamping block (45) is evenly fixedly connected to the outer side of the sealing cover (43); and the clamping block (45) is slidably connected to the inside of the clamping sleeve (44).

3. The temperature-resistant and pressure-resistant check valve for metallurgical system according to claim 2, characterized in that: The mounting mechanism (53) comprises a mounting block (531) mounted inside the first connecting seat (51) by means of bolts; the outer wall of the mounting block (531) is fixedly connected to a mounting sleeve (532); the interior of the mounting sleeve (532) is rotatably connected to a movable block (533); the outer wall of the movable block (533) is fixedly connected to a connecting block (534); and the sealing plate (541) is fixedly mounted on the outer side of the connecting block (534).

4. The temperature-resistant and pressure-resistant check valve for metallurgical system according to claim 2, characterized in that: The reset mechanism (56) comprises a mounting seat (561) slidably connected to the inside of the sealing plate (541); a fixing plate (563) is fixedly connected to the outer wall of the mounting seat (561); a mounting plate (564) is slidably connected to the inside of the sliding sleeve (543); and a spring (562) is fixedly connected between the fixing plate (563) and the mounting plate (564).

5. The temperature-resistant and pressure-resistant check valve for metallurgical system according to claim 2, characterized in that: An inclined surface is provided at one end of the sliding sleeve (543) close to the clamping seat (55), and a clamping groove matching the sliding sleeve (543) is provided at the top of the clamping seat (55).

6. The temperature-resistant and pressure-resistant check valve for metallurgical system according to claim 2, characterized in that: The push block (547) is composed of a rectangular block and a circular shaft, and the push block (547) is slidably connected between the two guide blocks (546).

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