Fire exchange denitration ammonia injection regulating valve for melting furnace

Abstract

The utility model provides a fire-exchanging, denitration and ammonia-spraying regulating valve for a melting furnace, belongs to the technical field of regulating valves, and aims to solve the problems that a regulating rotating wheel of an existing fire-exchanging, denitration and ammonia-spraying regulating valve for the melting furnace is exposed to the outside for a long time, the mistaken touch risk is large, and the potential safety hazard is large. The fixing piece is fixedly connected to the top of the valve main body; the fixed box is fixedly connected to the upper surface of the right end of the valve main body; the two protective covers are dispersedly arranged on the upper surfaces of the front end and the rear end of the fixing part; the opening and closing assembly is arranged on the fixing piece; and the limiting assembly is arranged in the limiting box. In daily use, the adjusting rotating wheel is wrapped by the two protective covers, safety production accidents caused by the fact that the adjusting rotating wheel is touched by mistake are avoided, the opening and closing states of the protective covers are adjusted conveniently and rapidly, and practicability is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of regulating valves, and more specifically, particularly relates to a melting furnace fire-changing denitration and ammonia spraying regulating valve. Background Art

[0002] By adjusting the regulating valve, the injection amount of ammonia during the furnace fire-changing and denitrification process can be accurately and stably controlled to meet the needs of the denitrification process. The existing furnace fire-changing and denitrification ammonia injection regulating valve is generally composed of a valve body, an air inlet and outlet, and an adjusting wheel.

[0003] The air inlet pipe is connected with the air inlet pipe of the air inlet pipe, and the air outlet pipe is connected with the air inlet pipe of the air outlet pipe.

[0004] Based on the above, during the furnace fire-changing and denitrification process, if the ammonia spray regulating wheel is accidentally touched, it may cause unstable ammonia flow, thereby affecting the denitrification effect and flue gas emission quality, thereby increasing the risk of safety accidents such as leakage and explosion. The furnace fire-changing and denitrification ammonia spray regulating valve is exposed to the outside world for a long time, and the risk of accidental touch is relatively high, which poses a great safety hazard. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a melting furnace fire-changing denitrification ammonia spray regulating valve to solve the problem that in the existing melting furnace fire-changing denitrification process, if the ammonia spray regulating wheel is accidentally touched, it may cause unstable ammonia flow, thereby affecting the denitrification effect and flue gas emission quality, thereby increasing the risk of safety accidents such as leakage and explosion, and the melting furnace fire-changing denitrification ammonia spray regulating valve is exposed to the outside world for a long time, the risk of accidental touch is relatively high, and there is a great safety hazard.

[0006] The utility model discloses a furnace fire-changing denitration ammonia spraying regulating valve, and the purpose and effect are achieved by the following specific technical means: a furnace fire-changing denitration ammonia spraying regulating valve, comprising a valve body; an air inlet, the air inlet is arranged on the left side of the valve body; an air outlet, the air outlet is arranged on the right side of the valve body; an adjusting wheel, the adjusting wheel is rotatably connected to the valve body; a fixing piece, the fixing piece is fixedly connected to the top of the valve body; a fixing box, the fixing box is fixedly connected to the right end of the valve body;

[0007] A limit box, the limit box is fixedly connected to the left side of the fixed box; a protective cover, two protective covers are provided, and the two protective covers are dispersedly arranged on the front and rear ends of the fixed part; an opening and closing component, the opening and closing component is arranged on the fixed part; a limit component, the limit component is arranged inside the limit box.

[0008] Furthermore, the opening and closing assembly includes: a sliding rod, which is slidably connected to the inside of a fixed box; a toggle rod, which is slidably connected to the left side of the fixed box and fixedly connected to the right side of the sliding rod; and an anti-slip pattern, wherein a plurality of anti-slip patterns are provided, and the plurality of anti-slip patterns are dispersedly and fixedly connected to the upper and lower surfaces of the toggle rod.

[0009] Furthermore, the opening and closing component also includes: a transmission rack, two transmission racks are provided, the two transmission racks are arranged in a mirror image, and the two transmission racks are respectively fixedly connected to the front and rear ends of the sliding rod; a connecting member, two connecting members are provided, and the two connecting members are dispersedly fixedly connected to the front and rear ends of the fixing member; a connecting shaft, two connecting shafts are provided, the two connecting shafts are respectively rotatably connected inside the two connecting members, and the two connecting shafts are respectively fixedly connected to the bottoms of the two protective covers; a transmission gear, two transmission gears are provided, the two transmission gears are respectively coaxially fixedly connected to the right end portions of the two connecting shafts, and the two transmission gears are respectively meshed with the two transmission racks.

[0010] Furthermore, the limiting assembly includes: a limiting ratchet, which is coaxially fixedly connected to the outside of a rear connecting shaft; a limiting pawl, which is rotatably connected to the inside of the limiting box and is engaged with the limiting ratchet.

[0011] Furthermore, the limit assembly also includes: a limit spring, the upper end of the limit spring is fixedly connected to the bottom of the outer end of the limit pawl, and the lower end of the limit spring is fixedly connected to the inside of the limit box.

[0012] Furthermore, the limit assembly also includes: a return spring, and the return spring is provided in two pieces, the upper ends of the two return springs are dispersedly fixedly connected under the sliding rod, and the lower ends of the two return springs are dispersedly fixedly connected inside the fixed box.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] First, move the toggle rod upwards, and through the gear-rack transmission mechanism formed by the meshing of two transmission gears and two transmission racks, the two connecting shafts can be driven to rotate in the two connecting parts respectively, thereby driving the two protective covers to open outwards at the same time, making it convenient to rotate and adjust the adjustment wheel.

[0015] Secondly, pressing the outer end of the limit pawl downward can disengage the limit pawl from the limit ratchet. At this time, under the rebound action of the reset spring, the sliding rod moves downward, thereby driving the two protective covers to close, wrapping the adjusting wheel inside to prevent the adjusting wheel from being accidentally touched.

[0016] In daily use, the utility model wraps the adjusting wheel with two protective covers to prevent the adjusting wheel from being accidentally touched and causing a production safety accident. By moving the toggle rod upward, the two protective covers can be driven to open outward at the same time, which is convenient for adjusting the adjusting wheel. By pressing the outer end of the limit ratchet downward, the two protective covers can be automatically closed. The operation is convenient and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2 It is a schematic diagram of the limit box structure of the utility model.

[0019] Figure 3 It is a schematic structural diagram of the protective cover of the utility model in an open state.

[0020] Figure 4 It is a schematic diagram of the sliding rod structure of the utility model.

[0021] Figure 5 It is a schematic diagram of the transmission rack structure of the utility model.

[0022] In the figure, the corresponding relationship between the component names and the figure numbers is as follows:

[0023] 1. Valve body; 101. Air inlet; 102. Air outlet; 2. Adjusting wheel; 3. Fixing piece; 4. Fixing box; 5. Limiting box; 6. Sliding rod; 601. Toggle rod; 602. Anti-slip pattern; 603. Transmission rack; 7. Connecting piece; 8. Connecting shaft; 801. Transmission gear; 802. Protective cover; 803. Limiting ratchet; 9. Limiting pawl; 901. Limiting spring; 10. Reset spring. DETAILED DESCRIPTION

[0024] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0025] Embodiment 1:

[0026] As attached Figure 1 To Attachment Figure 5 As shown:

[0027] The utility model provides a melting furnace fire-changing denitration and ammonia spraying regulating valve, comprising a valve body 1;

[0028] Air inlet 101, the air inlet 101 is arranged on the left side of the valve body 1; air outlet 102, the air outlet 102 is arranged on the right side of the valve body 1; adjusting wheel 2, the adjusting wheel 2 is rotatably connected to the valve body 1; fixing part 3, the fixing part 3 is fixedly connected to the top of the valve body 1; fixing box 4, the fixing box 4 is fixedly connected to the right end of the valve body 1; limit box 5, the limit box 5 is fixedly connected to the left side of the fixing box 4; protective cover 802, two protective covers 802 are arranged, and the two protective covers 802 are dispersedly arranged on the front and rear ends of the fixing part 3; opening and closing assembly, the opening and closing assembly is arranged on the fixing part 3.

[0029] Among them, the opening and closing components include: a sliding rod 6, which is slidably connected to the inside of the fixed box 4; a toggle rod 601, which is slidably connected to the left side of the fixed box 4, and the toggle rod 601 is fixedly connected to the right side of the sliding rod 6; an anti-slip pattern 602, and a plurality of anti-slip patterns 602 are provided, and a plurality of anti-slip patterns 602 are dispersedly and fixedly connected to the upper and lower surfaces of the toggle rod 601, which has the effect that moving the toggle rod 601 upward can drive the sliding rod 6 to slide upward inside the fixed box 4, and the anti-slip pattern 602 can increase the friction of the operator's fingers to prevent the operator's fingers from slipping against the toggle rod 601.

[0030] The opening and closing assembly further includes: a transmission rack 603, two transmission racks 603 are provided, the two transmission racks 603 are provided in a mirror image, and the two transmission racks 603 are respectively fixedly connected to the front and rear ends of the sliding rod 6; a connecting member 7, two connecting members 7 are provided, and the two connecting members 7 are dispersedly fixedly connected to the front and rear ends of the fixing member 3; a connecting shaft 8, two connecting shafts 8 are provided, and the two connecting shafts 8 are respectively rotatably connected inside the two connecting members 7, and the two connecting shafts 8 are respectively fixedly connected to the bottoms of the two protective covers 802;

[0031] Transmission gear 801, two transmission gears 801 are provided, and the two transmission gears 801 are coaxially fixedly connected to the right end portions of the two connecting shafts 8, and the two transmission gears 801 are respectively meshed with the two transmission racks 603, so that the sliding rod 6 drives the two connecting shafts 8 to rotate through the gear rack transmission mechanism formed by the two transmission gears 801 and the two transmission racks 603 respectively meshing, thereby driving the two protective covers 802 to open outwards.

[0032] The specific usage and function of this embodiment are as follows:

[0033] When it is necessary to rotate and adjust the adjusting wheel 2, the toggle rod 601 is moved upward, which can drive the sliding rod 6 to slide upward inside the fixed box 4. The anti-skid pattern 602 can increase the friction of the operator's fingers to prevent the operator's fingers and the toggle rod 601 from slipping. The sliding rod 6 drives the two transmission racks 603 to slide upward at the same time, thereby driving the two connecting shafts 8 to rotate in the two connecting parts 7 respectively through the gear rack transmission mechanism formed by the two transmission gears 801 and the two transmission racks 603 respectively meshing, thereby driving the two protective covers 802 to open outwards, so as to facilitate the rotation and adjustment of the adjusting wheel 2.

[0034] Embodiment 2:

[0035] Based on the first embodiment, as shown in the attached Figure 1 To Attachment Figure 5 As shown, it also includes a limit component, which is arranged inside the limit box 5.

[0036] Among them, the limiting component includes: a limiting ratchet 803, which is coaxially fixedly connected to the outside of a connecting shaft 8 at the rear; a limiting pawl 9, which is rotatably connected to the inside of the limiting box 5, and the limiting pawl 9 is engaged with the limiting ratchet 803. The effect is that under the action of the ratchet and pawl transmission mechanism jointly formed by the engagement of the limiting pawl 9 and the limiting ratchet 803, the connecting shaft 8 can only rotate in one direction, so that the two protective covers 802 can only be opened to the outside but cannot be closed.

[0037] Among them, the limit assembly also includes: a limit spring 901, the upper end of the limit spring 901 is fixedly connected to the bottom of the outer end of the limit pawl 9, and the lower end of the limit spring 901 is fixedly connected to the inside of the limit box 5. The effect is that by pressing the outer end of the limit pawl 9 downward, the limit pawl 9 can be disengaged from the limit ratchet 803, and the outer end of the limit pawl 9 is released. Under the action of the limit spring 901, the limit pawl 9 and the limit ratchet 803 are engaged again.

[0038] Among them, the limiting component also includes: a reset spring 10, two reset springs 10 are arranged, the upper ends of the two reset springs 10 are dispersedly fixedly connected under the sliding rod 6, and the lower ends of the two reset springs 10 are dispersedly fixedly connected inside the fixed box 4. The effect brought about is that after the limiting pawl 9 is disengaged from the limiting ratchet 803, under the rebound action of the reset spring 10, the sliding rod 6 moves downward, thereby driving the two protective covers 802 to close.

[0039] The specific usage and function of this embodiment are as follows:

[0040] When the sliding rod 6 slides upward, the two return springs 10 will be stretched and expanded. However, under the action of the ratchet and pawl transmission mechanism composed of the engagement of the limit pawl 9 and the limit ratchet 803, the connecting shaft 8 can only rotate in one direction. Therefore, after the toggle rod 601 is released, the sliding rod 6 will not be moved downward by the rebound force of the two return springs 10; when the rotation and adjustment of the adjusting wheel 2 is completed, pressing the outer end of the limit pawl 9 downward can make the limit pawl 9 disengage from the limit ratchet 803. At this time, under the rebound action of the return spring 10, the sliding rod 6 moves downward, thereby driving the two protective covers 802 to close, preventing the adjusting wheel 2 from being accidentally touched by external interference, and then releasing the outer end of the limit pawl 9. Under the action of the limit spring 901, the limit pawl 9 and the limit ratchet 803 are engaged again, which is convenient for reuse.

[0041] The specific description of the present invention in the above embodiments is only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Technical engineers in this field may make some non-essential improvements and adjustments to the present invention based on the contents of the above-mentioned utility model, which fall within the scope of protection of the present invention.

Claims

1. A melting furnace fire-changing denitration ammonia spraying regulating valve, the melting furnace fire-changing denitration ammonia spraying regulating valve comprising a valve body, an air inlet, an air outlet, an adjusting wheel, a fixing part, a fixing box, a limit box, a protective cover, an opening and closing component and a limit component; the air inlet is arranged on the left side of the valve body; the air outlet is arranged on the right side of the valve body; the characteristics are: The regulating wheel is rotatably connected to the valve body; The fixing piece is fixedly connected to the top of the valve body; the fixing box is fixedly connected to the right end of the valve body; the limit box is fixedly connected to the left side of the fixing box; The protective covers are provided in two pieces, and the two protective covers are separately arranged on the front and rear ends of the fixing member; the opening and closing assembly is arranged on the fixing member; The limiting assembly is arranged inside the limiting box.

2. A melting furnace fire-changing denitration and ammonia injection regulating valve as claimed in claim 1, characterized in that: The opening and closing assembly includes: a sliding rod, a toggle rod and anti-slip patterns; the sliding rod is slidably connected inside the fixing box; The toggle rod is slidably connected to the left side of the fixing box, and the toggle rod is fixedly connected to the right side of the sliding rod; the anti-slip patterns are provided in multiple pieces, and the multiple anti-slip patterns are dispersedly and fixedly connected to the upper and lower surfaces of the toggle rod.

3. A melting furnace fire-changing denitration and ammonia injection regulating valve as claimed in claim 2, characterized in that: The opening and closing assembly also includes: a transmission rack, a connecting piece, a connecting shaft and a transmission gear; two transmission racks are provided, the two transmission racks are arranged in a mirror image, and the two transmission racks are respectively fixedly connected to the front and rear ends of the sliding rod; two connecting pieces are provided, and the two connecting pieces are dispersedly fixedly connected to the front and rear ends of the fixing piece; two connecting shafts are provided, the two connecting shafts are respectively rotatably connected inside the two connecting pieces, and the two connecting shafts are respectively fixedly connected to the bottoms of the two protective covers; two transmission gears are provided, the two transmission gears are respectively coaxially fixedly connected to the right ends of the two connecting shafts, and the two transmission gears are respectively meshed with the two transmission racks.

4. A melting furnace fire-changing denitration and ammonia injection regulating valve as claimed in claim 1, characterized in that: The limiting assembly includes: a limiting ratchet and a limiting pawl; the limiting ratchet is coaxially fixedly connected to the outside of a rear connecting shaft; the limiting pawl is rotatably connected to the inside of the limiting box, and the limiting pawl is meshed with the limiting ratchet.

5. A melting furnace fire-changing denitration and ammonia injection regulating valve as claimed in claim 4, characterized in that: The limit assembly also includes: a limit spring; the upper end of the limit spring is fixedly connected to the lower side of the outer end of the limit pawl, and the lower end of the limit spring is fixedly connected to the inside of the limit box.

6. A melting furnace fire-changing denitration and ammonia injection regulating valve as claimed in claim 5, characterized in that: The limit assembly also includes: a return spring; two return springs are provided, the upper ends of the two return springs are dispersedly fixedly connected under the sliding rod, and the lower ends of the two return springs are dispersedly fixedly connected inside the fixing box.

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