Furnace top blow-off valve

Abstract

The utility model relates to the technical field of furnace top blow-off valves, and provides a furnace top blow-off valve which comprises a shell rotationally arranged on a valve seat. The sliding seat is arranged in the shell in a sliding manner; the pressing rod is slidably arranged on the sliding seat, and the sliding direction of the pressing rod is parallel to the sliding direction of the sliding seat. Two ends of the elastic piece are respectively arranged on the pressing rod and the sliding seat; the elastic piece is used for providing force for the pressing rod to drive the valve deck to be away from the shell. By means of the technical scheme, the problem that in the prior art, the sealing pressure of the valve cover cannot be adjusted in production is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of furnace top relief valves, and in particular to a furnace top relief valve. Background Art

[0002] The top relief valve is installed on the relief pipe of the blast furnace top to play a role in safe relief. When the blast furnace is in normal production, a constant pressure needs to be maintained inside. When the pressure inside the blast furnace increases, the top relief valve automatically opens to release the excess pressure to keep the pressure inside the blast furnace constant, thereby avoiding accidents caused by pressure fluctuations inside the blast furnace.

[0003] For the furnace top relief valve in the prior art, the disc spring pressure can only be adjusted by adding an adjustment pad at the bottom of the disc spring bin, and after the adjustment, it is impossible to detect whether the sealing requirements are met, and it can only be observed during production. During production, if it is found that the valve cover sealing pressure is not in a normal state, the blast furnace must be stopped before adjustment, which affects production efficiency. Utility Model Content

[0004] The utility model provides a furnace top relief valve, which solves the problem in the related art that the sealing pressure of the valve cover cannot be adjusted during production.

[0005] The technical solution of the utility model is as follows:

[0006] A furnace top relief valve, comprising:

[0007] Valve seat;

[0008] A housing, rotatably disposed on the valve seat;

[0009] A sliding seat, slidably disposed in the housing;

[0010] A pressure rod is slidably arranged on the sliding seat, and a sliding direction of the pressure rod is parallel to a sliding direction of the sliding seat;

[0011] An elastic member, two ends of which are respectively arranged on the pressure rod and the sliding seat;

[0012] The valve cover is arranged at one end of the pressure rod close to the valve seat, and the elastic member is used to provide the pressure rod with a force to drive the valve cover away from the housing.

[0013] As a further technical solution, it also includes:

[0014] A worm wheel, rotatably disposed in the housing, the worm wheel being threadedly connected to the sliding seat;

[0015] A worm is rotatably arranged in the housing, and the worm wheel is meshed with the worm.

[0016] As a further technical solution, it also includes:

[0017] An upper cover and a lower cover are respectively arranged at two ends of the housing, and the sliding seat penetrates through the upper cover and the lower cover to slide;

[0018] The sealing cover is arranged at one end of the sliding seat close to the valve cover.

[0019] As a further technical solution, it also includes:

[0020] A pressure bearing is arranged between the worm gear and the upper cover.

[0021] As a further technical solution, it also includes:

[0022] A dial, arranged on the upper cover;

[0023] A pointer is arranged on the worm wheel, and after the worm wheel rotates, the pointer points to different positions of the dial.

[0024] As a further technical solution, the pressure rod passes through the sliding seat, and further comprises:

[0025] A round nut is threadedly connected to an end of the pressure rod away from the valve cover, and the round nut is located on the outer wall of the sliding seat.

[0026] As a further technical solution, it also includes:

[0027] A swing plate is rotatably disposed on the valve seat, and the housing is rotatably disposed on the valve seat via the swing plate;

[0028] The connecting shaft has two ends respectively arranged on the swing plate and the housing.

[0029] As a further technical solution, it also includes:

[0030] a valve body, wherein the valve seat is arranged on the valve body;

[0031] A telescopic member, wherein the telescopic end of the telescopic member is rotatably disposed on the valve seat, and the rotation axis of the telescopic member is the same as the rotation axis of the swing plate;

[0032] The second connecting rod has two ends hinged on the telescopic member and the swing plate respectively. After the telescopic member is extended and retracted, the second connecting rod drives the swing plate to rotate.

[0033] As a further technical solution, it also includes:

[0034] A first connecting rod, both ends of which are hingedly arranged on the valve body and the telescopic member, and after the telescopic member is extended or contracted, the first connecting rod rotates relative to the valve body;

[0035] A limiter is arranged on the valve body, and the limiter is used to limit the rotation angle of the first connecting rod.

[0036] As a further technical solution, the shell body is provided with a limiting platform, and the sliding seat is provided with a shoulder. After the sliding seat slides, the shoulder abuts against the limiting platform.

[0037] The working principle and beneficial effects of the utility model are:

[0038] In the utility model, the shell body can rotate on the valve seat. After the shell body rotates, the valve cover is buckled on the valve seat or leaves the valve seat, and the sliding seat can slide in the shell body. After the sliding seat slides in the direction of the pressure rod, the elastic member is compressed, and the pressure rod is given a force to press the valve cover to the valve seat. The valve cover is pressed against the valve seat by the pressure rod, so that a certain pressure can be maintained in the blast furnace. The elastic member can adopt a disc spring, and the disc spring can withstand a large compression effect in the vertical direction.

[0039] In actual use, the pressure of the elastic member on the pressure rod can be freely adjusted by adjusting the sliding seat, without having to stop the blast furnace for adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present utility model.

[0041] Figure 1 This is a schematic diagram of the overall opening structure of the utility model;

[0042] Figure 2 It is a cross-sectional schematic diagram of the utility model at AA;

[0043] Figure 3 This is a top view of the housing of the utility model;

[0044] Figure 4 It is a cross-sectional schematic diagram of the utility model at BB;

[0045] Figure 5 This is a front view of the housing of the utility model;

[0046] Figure 6 It is a schematic diagram of the overall cover closing structure of the utility model.

[0047] In the figure: 1, valve seat, 2, shell, 3, sliding seat, 4, pressure rod, 5, elastic member, 6, valve cover, 7, worm gear, 8, worm, 9, upper cover, 10, lower cover, 11, sealing cover, 12, pressure bearing, 13, dial, 14, pointer, 15, round nut, 16, swing plate, 17, connecting shaft, 18, valve body, 19, telescopic member, 20, second connecting rod, 21, first connecting rod, 22, limit member, 201, limit platform, 301, shoulder. DETAILED DESCRIPTION

[0048] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0049] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0050] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0051] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0052] Reference Figure 1 to Figure 6 The utility model proposes a furnace top relief valve, including a shell 2 rotatably arranged on a valve seat 1; a sliding seat 3 slidably arranged in the shell 2; a pressure rod 4 slidably arranged on the sliding seat 3, and the sliding direction of the pressure rod 4 is parallel to the sliding direction of the sliding seat 3; two ends of an elastic member 5 are respectively arranged on the pressure rod 4 and the sliding seat 3; a valve cover 6 is arranged at one end of the pressure rod 4 close to the valve seat 1, and the elastic member 5 is used to provide a force for the pressure rod 4 to drive the valve cover 6 away from the shell 2.

[0053] In this embodiment, the shell 2 can rotate on the valve seat 1. After the shell 2 rotates, the valve cover 6 is buckled on the valve seat 1 or leaves the valve seat 1. The sliding seat 3 can slide in the shell 2. After the sliding seat 3 slides in the direction of the pressure rod 4, the elastic member 5 is compressed and gives the pressure rod 4 a force to press the valve cover 6 toward the valve seat 1. The valve cover 6 is pressed against the valve seat 1 by the pressure rod 4, so that a certain pressure can be maintained in the blast furnace. The elastic member 5 can adopt a disc spring, which can withstand a large compression in the vertical direction.

[0054] In actual use, the pressure of the elastic member 5 on the pressure rod 4 can be freely adjusted by adjusting the sliding seat 3, without having to stop the blast furnace for adjustment.

[0055] Furthermore, the worm wheel 7 is rotatably arranged in the housing 2 , and the worm wheel 7 is threadedly connected to the sliding seat 3 ; the worm 8 is rotatably arranged in the housing 2 , and the worm wheel 7 is meshed with the worm 8 .

[0056] In this embodiment, the sliding seat 3 is adjusted by the worm gear 7 and the worm 8, which not only prevents the sliding seat 3 from being bounced up under the action of the elastic member 5, but also the worm gear 7 is sleeved on the outside of the sliding seat 3, and the internal thread of the worm gear 7 is connected to the external thread of the sliding seat 3. Through the worm gear 7, the torque can be increased, the force required for adjusting the sliding seat 3 can be reduced, and the convenience of adjusting the sliding seat 3 is improved.

[0057] Furthermore, an upper cover 9 and a lower cover 10 are respectively arranged at two ends of the shell, and the sliding seat 3 slides through the upper cover 9 and the lower cover 10; and a sealing cover 11 is arranged at one end of the sliding seat 3 close to the valve cover 6.

[0058] In this embodiment, the upper cover 9 and the lower cover 10 block the gaps at both ends between the shell 2 and the sliding seat 3 to prevent dust from entering between the shell 2 and the sliding seat 3. The cover 11 can prevent dust from entering the interior of the sliding seat 3 where the elastic member 5 is located.

[0059] Furthermore, a pressure bearing 12 is provided between the worm gear 7 and the upper cover 9 .

[0060] In this embodiment, since the sliding seat 3 is subjected to pressure perpendicular to the sliding direction of the sliding seat 3, a certain pressure will also be generated between the worm gear 7 and the housing 2 due to the action of the sliding seat 3. The pressure bearing 12 can ensure that the worm gear 7 can rotate normally when the worm gear 7 is under pressure.

[0061] Furthermore, a dial 13 is arranged on the upper cover 9; a pointer 14 is arranged on the worm gear 7, and after the worm gear 7 rotates, the pointer 14 points to different positions of the dial 13.

[0062] In this embodiment, the worm gear 7 changes the position of the sliding seat 3 by rotating. After the sliding seat 3 slides, the elastic member 5 is compressed or stretched, and the pressure applied by the elastic member 5 to the valve cover 6 changes. The pointer 14 rotates with the worm gear 7. By pointing the pointer 14 to different positions of the dial 13, the sealing pressure value can be accurately determined, allowing users to use it more safely and efficiently.

[0063] Furthermore, the pressure rod 4 passes through the sliding seat 3 and includes a round nut 15 threadedly connected to an end of the pressure rod 4 away from the valve cover 6 , and the round nut 15 is located on the outer wall of the sliding seat 3 .

[0064] In this embodiment, the pressure rod 4 passes through the sliding seat 3 from the inside of the sliding seat 3, and the end of the pressure rod 4 away from the valve cover 6 is threadedly connected with a round nut 15, and the round nut 15 is located on the outer wall of the sliding seat 3. The round nut 15 can be stuck on the upper cover 9 to prevent the pressure rod 4 from slipping out of the sliding seat 3. In addition, the use of the round nut 15 makes the pressure rod 4 easy to install. After passing one end of the pressure rod 4 through the sliding seat 3, the round nut 15 can be screwed onto the pressure rod 4.

[0065] Furthermore, the swing plate 16 is rotatably arranged on the valve seat 1, and the shell 2 is rotatably arranged on the valve seat 1 through the swing plate 16; and both ends of the connecting shaft 17 are respectively arranged on the swing plate 16 and the shell 2.

[0066] In this embodiment, the swing plate 16 is rotatably arranged on the valve seat 1, and the shell 2 is arranged on the swing plate 16 through the connecting shaft 17. The shell 2 rotates on the valve seat 1 through the swing plate 16. Through the swing plate 16, the pressure rod 4 in the shell 2 can act on the valve cover 6 by force.

[0067] Furthermore, it also includes a valve seat 1 arranged on the valve body 18; the telescopic end of the telescopic member 19 is rotatably arranged on the valve seat 1, and the rotation axis of the telescopic member 19 is the same as the rotation axis of the swing plate 16; the two ends of the second connecting rod 20 are respectively hinged on the telescopic member 19 and the swing plate 16, and after the telescopic member 19 is extended and retracted, the second connecting rod 20 drives the swing plate 16 to rotate.

[0068] In this embodiment, the second connecting rod 20 is hingedly arranged on the telescopic member 19 and the swing plate 16 respectively. When the telescopic member 19 is extended, the telescopic end of the telescopic member 19 rotates around the valve seat 1, and the second connecting rod 20 drives the swing plate 16 to rotate toward the telescopic member 19, so that the valve cover 6 is away from the valve seat 1. The telescopic member 19 shrinks, and the valve cover 6 is buckled on the valve seat 1 again. The valve body 18 acts on the blast furnace, and the end of the valve seat 1 that cooperates with the valve cover 6 has a sealing ring.

[0069] Furthermore, the first connecting rod 21 is hinged at both ends on the valve body 18 and the telescopic member 19 respectively. After the telescopic member 19 is extended or contracted, the first connecting rod 21 rotates relative to the valve body 18; a limit member 22 is arranged on the valve body 18, and the limit member 22 is used to limit the rotation angle of the first connecting rod 21.

[0070] In this embodiment, after the telescopic member 19 is extended and retracted, the telescopic member 19 rotates around the valve cover 6. After the telescopic member 19 rotates, the first connecting rod 21 abuts against the limiting member 22 to block the telescopic member 19 from rotating, thereby limiting the rotation angle of the telescopic member 19, thereby limiting the swing angle of the swing plate 16.

[0071] Furthermore, the housing 2 has a limiting platform 201 , and the sliding seat 3 has a shoulder 301 . After the sliding seat 3 slides, the shoulder 301 abuts against the limiting platform 201 .

[0072] In this embodiment, after the shoulder 301 on the sliding seat 3 abuts against the limit platform 201 on the shell 2, the sliding seat 3 can be restricted from sliding toward the upper cover 9, thereby improving the safety of the entire relief valve and preventing the sliding seat 3 from escaping from the shell 2 due to excessive elastic force of the elastic member 5.

[0073] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A furnace top relief valve, characterized in that: include: Valve seat (1); A housing (2) rotatably disposed on the valve seat (1); A sliding seat (3) slidably disposed in the housing (2); A pressure rod (4) is slidably arranged on the sliding seat (3), and the sliding direction of the pressure rod (4) is parallel to the sliding direction of the sliding seat (3); An elastic member (5), two ends of which are respectively arranged on the pressure rod (4) and the sliding seat (3); The valve cover (6) is arranged at one end of the pressure rod (4) close to the valve seat (1), and the elastic member (5) is used to provide a force for the pressure rod (4) to drive the valve cover (6) away from the housing (2).

2. A furnace top relief valve according to claim 1, characterized in that: Also includes: A worm wheel (7) rotatably disposed in the housing (2), the worm wheel (7) being threadably connected to the sliding seat (3); A worm (8) is rotatably disposed in the housing (2), and the worm wheel (7) is meshed with the worm (8).

3. A furnace top relief valve according to claim 2, characterized in that: Also includes: An upper cover (9) and a lower cover (10) are respectively arranged at two ends of the housing (2), and the sliding seat (3) penetrates the upper cover (9) and the lower cover (10) to slide; A sealing cover (11) is arranged on one end of the sliding seat (3) close to the valve cover (6).

4. A furnace top relief valve according to claim 3, characterized in that: Also includes: A pressure bearing (12) is arranged between the worm gear (7) and the upper cover (9).

5. A furnace top relief valve according to claim 3, characterized in that: Also includes: A dial (13) disposed on the upper cover (9); A pointer (14) is arranged on the worm wheel (7); after the worm wheel (7) rotates, the pointer (14) points to different positions of the scale plate (13).

6. A furnace top relief valve according to claim 1, characterized in that: The pressure rod (4) passes through the sliding seat (3), and further comprises: A round nut (15) is threadedly connected to an end of the pressure rod (4) away from the valve cover (6), and the round nut (15) is located on the outer wall of the sliding seat (3).

7. A furnace top relief valve according to claim 1, characterized in that: Also includes: a swing plate (16) rotatably disposed on the valve seat (1), and the housing (2) is rotatably disposed on the valve seat (1) via the swing plate (16); A connecting shaft (17) has two ends disposed on the swing plate (16) and the housing (2) respectively.

8. A furnace top relief valve according to claim 7, characterized in that: Also includes: A valve body (18), wherein the valve seat (1) is arranged on the valve body (18); a telescopic member (19), the telescopic end of the telescopic member (19) being rotatably disposed on the valve seat (1), and the rotation axis of the telescopic member (19) being the same as the rotation axis of the swing plate (16); The second connecting rod (20) has two ends hinged on the telescopic member (19) and the swing plate (16), respectively. When the telescopic member (19) is extended and then retracted, the second connecting rod (20) drives the swing plate (16) to rotate.

9. A furnace top relief valve according to claim 8, characterized in that: Also includes: a first connecting rod (21), both ends of which are hingedly arranged on the valve body (18) and the telescopic member (19), and after the telescopic member (19) is extended or contracted, the first connecting rod (21) rotates relative to the valve body (18); A limiter (22) is provided on the valve body (18), and the limiter (22) is used to limit the rotation angle of the first connecting rod (21).

10. A furnace top relief valve according to claim 1, characterized in that: The housing (2) is provided with a limiting platform (201), and the sliding seat (3) is provided with a shoulder (301); after the sliding seat (3) slides, the shoulder (301) abuts against the limiting platform (201).

Images