Flue gas cut-off valve

Abstract

The utility model discloses a flue gas cut-off valve. The utility model relates to a smoke check valve, which comprises a valve body and a valve core, the valve body is provided with a smoke inlet and a smoke outlet, the valve core comprises a valve core rotation actuating mechanism and valve plates arranged at two ends of a rotating shaft, the valve plates are provided with valve plate movement mechanisms, and the center of the rotating shaft of the valve core is connected with the valve core rotation actuating mechanism arranged at the top of the valve body through a transmission shaft. The valve plate moving mechanism comprises a valve plate driving mechanism cavity and a connecting component, the valve plate driving mechanism cavity is composed of an expansion joint, a valve plate and an auxiliary plate, the auxiliary plate is connected to the valve element rotating shaft, the connecting component is composed of a telescopic arm and a guide rail, and the telescopic arm and the guide rail are connected with the valve plate and the auxiliary plate respectively. Abrasion caused by direct mechanical extrusion between the sealing faces of the valve plate and the valve body can be avoided, the requirement of the sealing faces for machining precision is lowered, machining cost is reduced, when the stop valve is opened, the effective flow area is large, pressure drop is low, and the stop valve has the advantages of being high in economical efficiency, safe and reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to petrochemical equipment technical field, concretely relates to a flue gas cut -off valve. BACKGROUND

[0002] In the industrial production process of chemical industry, oil refining, metallurgy and electric power, there are low-pressure medium pipelines such as flue gas pipelines and ventilation pipelines, these pipelines are used to input or discharge low-pressure medium such as high-temperature flue gas and air, so as to cooperate with the production process.

[0003] In order to open and close these pipelines, a metal sealing valve or a water seal tank suitable for high temperature is often arranged in the pipeline, the sealing surface of the valve plate extrudes the sealing surface of the valve body, so that elastic force is generated between them, a certain sealing specific pressure is reached, and the sealing of the sealing valve is ensured. After a period of use, the ball valve flap and the sealing ring rub, a gap appears between the sealing surfaces, and the sealing performance is difficult to guarantee, so that the service life of the ball valve is greatly reduced. When the water seal tank is used to cut off the flue gas, due to the complex flow channel structure of the water seal tank, the pressure drop is large, for example, the patent CN2024211521482 discloses an eccentric rotating ball valve, the eccentric rotating ball valve comprises a valve body structure, the valve body structure comprises a valve shell, an operating valve rod and a mounting plate, an operating wheel is arranged on the outer side of the operating valve rod in a sliding mode, an outer groove is formed in the outer side of the operating valve rod, a thin rod is rotatably arranged on one side of the operating wheel, and a clamping rod is fixedly connected to one end of the thin rod. After the eccentric rotating ball valve is closed, the operating wheel is pushed to slide on the outer side of the operating valve rod, when the sliding block slides into the outer groove formed in the outer side of the operating valve rod, the rotating operating wheel will drive the sliding block to rotate in the outer groove, and the rotating operating wheel will not cause the operating valve rod to rotate, so that the eccentric rotating ball valve is closed, and the user's accidental touch of the operating wheel is avoided, so that the operating valve rod is prevented from rotating, and the stability of the sealing function of the eccentric rotating ball valve is ensured. However, the sealing surface is hard sealing, and a gap is easily generated between the sealing surfaces of the valve ball and the valve seat, and when the sealing torque is increased, the sealing surface is easily damaged, resulting in sealing failure and poor safety.

[0004] The above problems are urgent to be solved at present. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a flue gas cut-off valve to overcome the defects of high machining cost caused by high precision requirement of the sealing surface and abrasion caused by direct mechanical extrusion between the sealing surfaces of the valve plate and the valve body in the prior art.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A flue gas cut-off valve, comprising a valve body and a valve core, the valve body is provided with flue gas inlet and outlet, characterized in that: the valve core comprises a valve core rotating actuator and valve plates arranged at both ends of the rotating shaft, the valve plate is provided with a valve plate movement mechanism, the rotating shaft center of the valve core is connected with the valve core rotating actuator arranged at the top of the valve body through a transmission shaft, the valve plate movement mechanism comprises a valve plate driving mechanism cavity and a connecting member, the valve plate driving mechanism cavity is composed of an expansion joint, a valve plate and an auxiliary plate, the auxiliary plate is connected with the valve core rotating shaft, the connecting member is composed of an extension arm and a guide rail, the extension arm and the guide rail are connected with the valve plate and the auxiliary plate respectively.

[0008] The utility model further technical characteristics lie in that: reset spring is further arranged in the valve plate driving mechanism cavity.

[0009] The utility model further technical characteristics lie in that: the sealing surface and the fluid passing port are arranged in the cross section of the valve body main part which can cut off the fluid channel, the sealing surface is arranged around the fluid passing port; the flexible sealing ring is arranged at the abutment of the valve plate and the sealing surface; the flue gas inlet and the flue gas outlet are provided with the arc-shaped groove which is suitable for the flexible sealing ring clamping at the fitting position of the flexible sealing ring.

[0010] The utility model further technical characteristics lie in that: the valve plate movement mechanism of the single-piece valve plate is composed of a single expansion joint and a single connecting member, the two ends of the connecting member and the two ends of the expansion joint are connected with the valve plate and the auxiliary plate respectively, the auxiliary plate is connected with the valve core rotating shaft through the connecting rod, and the guide rail is arranged in the expansion joint.

[0011] The utility model further technical characteristics lie in that: the valve plate movement mechanism of the single-piece valve plate is composed of a single connecting member and multiple expansion joints, the two ends of the connecting member and the two ends of the expansion joint are connected with the valve plate and the auxiliary plate respectively, the auxiliary plate is connected with the valve core rotating shaft through the connecting rod, the expansion joints are distributed along the circumference of the guide rail, and the number of the expansion joints is preferably N, 2≤N≤100.

[0012] The utility model further technical characteristics lie in that: the movement mechanism of the single-piece valve plate is composed of equal number of expansion joints and connecting members, the two ends of the connecting members and the two ends of the expansion joints are connected with the valve plate and the auxiliary plate respectively, the auxiliary plate is connected with the valve core rotating shaft through the connecting rod, the connecting members are arranged in the expansion joints, and the number of the expansion joints and the connecting members is preferably N, 2≤N≤100.

[0013] The utility model further technical characteristics lie in that: the valve plate is an arc-shaped plate or a flat plate.

[0014] The utility model further technical characteristics lie in that: the flue gas cut-off valve is provided with a gas path component, one end of the gas path component is connected with the expansion joint, and the other end penetrates through the valve body and is connected with an external gas source.

[0015] The utility model has obvious advantages and beneficial effects compared with prior art. By the above technical scheme, the utility model can achieve considerable technical progress and practicality, and has extensive industrial utilization value, and has at least the following advantages:

[0016] 1) The utility model avoids the abrasion caused by the direct mechanical extrusion between the sealing surface of the valve plate and the valve body, reduces the requirement of the sealing surface on the machining precision, and reduces the machining cost.

[0017] 2) The valve plate driving mechanism is driven by gas, which is mature, safe and reliable.

[0018] 3) When the shut-off valve is opened, the effective flow area is large, the pressure drop is low, and the economy is high.

[0019] The utility model will be further described in detail by the drawings and specific embodiments, but the drawings and specific embodiments do not limit the scope of the utility model. DRAWINGS

[0020] Figure 1 It is a schematic diagram of a flue gas shut-off valve of the utility model embodiment 1.

[0021] Figure 2 It is a schematic diagram of a flue gas shut-off valve of the utility model embodiment 2.

[0022] Figure 3 It is a schematic diagram of a flue gas shut-off valve of the utility model embodiment 3.

[0023] Figure 4 It is a schematic diagram of a connecting member of the utility model.

[0024] The reference signs shown in the drawing are:

[0025] 1: valve plate; 2: valve core;

[0026] 3: valve body; 4: valve core rotation execution mechanism;

[0027] 5: high-pressure gas inlet; 6: valve body sealing surface;

[0028] 7: expansion joint; 8: connecting member;

[0029] 9: flue gas inlet; 10: reset spring;

[0030] 11: flue gas outlet; 12: auxiliary plate;

[0031] 801: telescopic arm; 802: guide rail. SPECIFIC EMBODIMENTS

[0032] The utility model will be further explained in detail in combination with the drawings. These drawings are all simplified schematic diagrams, and only schematically show the basic structure of the utility model, so they only show the relevant components of the utility model.

[0033] The utility model discloses a flue gas cut -off valve, including valve body 3 and valve core 2, the valve body 3 is equipped with flue gas import 9, flue gas export 11, the valve core 2 includes valve core rotation execution mechanism 4 and the valve plate 1 of setting at the both ends of the pivot, be provided with valve plate movement mechanism on the valve plate 1, the pivot center of valve core 2 is connected through transmission shaft and is arranged in the valve core rotation execution mechanism 4 of valve body 1 top, the valve plate movement mechanism includes valve plate drive mechanism cavity and connecting component 8, the valve plate drive mechanism cavity is by expansion joint 7, valve plate 1 and auxiliary board 12 is formed, the auxiliary board 12 is connected on the valve core pivot, connecting component 8 is by telescopic arm 801 and guide rail 802 is formed, and telescopic arm 801 is connected with guide rail 802 respectively with valve plate 1 and auxiliary board 12.

[0034] Reset spring 10 is further provided in the valve plate drive mechanism cavity.

[0035] Valve body sealing surface 6 and fluid pass-through port are arranged in the section of valve body main part that can cut off fluid passage, and the valve body sealing surface is arranged around the fluid pass-through port; Flexible sealing ring is arranged at the abutment of the valve plate 1 and the valve body sealing surface 6; The flue gas import and the flue gas export are opened with the arc-shaped groove that is suitable for the flexible sealing ring clamping at the flexible sealing ring adaptation place.

[0036] Embodiment one

[0037] As Figure 1 Shown:

[0038] The valve plate movement mechanism of single block valve plate is formed by a single expansion joint and a single connecting component, the two ends of the connecting component 8 and the two ends of the expansion joint 7 are connected on the valve plate 1 and the auxiliary board 12 respectively, the auxiliary board 12 is connected on the valve core pivot through the connecting rod, and the guide rail is arranged inside the expansion joint 7.

[0039] When cutting off the flue gas, the valve core rotation execution mechanism 4 rotates the valve core to the flue gas closing position, the high-pressure gas inlet 5 connects the high-pressure gas, when connecting the gas source, the pressure in the valve plate movement mechanism cavity formed by the expansion joint 7, the valve plate 1 and the auxiliary board 12 rises, the high-pressure gas pushes the expansion joint 7 to elongate, the telescopic arm 801 of the connecting component 8 and the guide rail 802 elongate and move in the cavity, the telescopic arm 801 of the connecting component 8 is connected with the valve plate, and the guide rail 802 is connected with the auxiliary board 12. After the expansion joint 7 is elongated, the valve plate 1 connected by the connecting component 8 moves relatively between the position of opening and closing the flue gas import 9 and the flue gas export 11 relative to the valve body 3, in the closing fluid pass-through port position, the valve plate 1 realizes sealing by cooperating with the valve body sealing surface 6 through the side surface, and cuts off the fluid passage.

[0040] When the flue gas passage needs to be opened, the high-pressure gas source is cut off at the high-pressure gas inlet 5, the reset spring 10 exerts a pulling force, the expansion joint 7 shortens, and the connecting member 8 shortens. The valve plate 1 is separated from the valve body sealing surface 6, the valve core is rotated to the flue gas flow passage position by the rotating actuator 4, and the flue gas flow passage is opened.

[0041] Example Two

[0042] As shown in Figure 2 :

[0043] The valve plate movement mechanism of the single-piece valve plate is composed of a single connecting member and multiple expansion joints. The two ends of the connecting member 8 are connected to the two ends of the expansion joint 7, which are connected to the valve plate 1 and the auxiliary plate 12, respectively. The auxiliary plate 12 is connected to the valve core shaft through a connecting rod, and the expansion joint 7 is distributed circumferentially along the outer guide rail. The number of expansion joints 7 is 12.

[0044] As shown in Figure 4 : The connecting member 8, the movement mechanism of the single-piece valve plate is composed of a single telescopic arm 801 and a single guide rail 802. The telescopic arm 801 is connected to the valve plate, and the guide rail 802 is connected to the auxiliary plate 12. The auxiliary plate 12 is connected to the valve core shaft through a connecting rod. Each expansion joint is connected to the high-pressure gas inlet 5 through a gas path member.

[0045] When the flue gas needs to be cut off, the valve core is rotated to the flue gas closing position by the valve core rotating actuator 4, the high-pressure gas inlet 5 is connected to the high-pressure gas, and when the gas source is connected, the high-pressure gas pushes the expansion joint 7 to elongate. The valve plate 1 connected by the connecting member 8 moves relatively between the open and closed flue gas inlet 9, flue gas outlet 11 positions of the valve body 3. In the closed fluid passage position, the valve plate 1 is sealed by the side surface cooperating with the valve body sealing surface 6, and the fluid passage is cut off.

[0046] When the flue gas passage needs to be opened, the high-pressure gas source is cut off at the high-pressure gas inlet 5, the reset spring 10 exerts a pulling force, the expansion joint 7 shortens, and the connecting member 8 shortens. The valve plate 1 is separated from the valve body sealing surface 6, the valve core is rotated to the flue gas flow passage position by the rotating actuator 4, and the flue gas flow passage is opened.

[0047] Example Three

[0048] As shown in Figure 3 :

[0049] The movement mechanism of the single-piece valve plate is composed of the same number of expansion joints 7 and connecting members 8. The two ends of the connecting member 8 and the two ends of the expansion joint 7 are connected to the valve plate and the auxiliary plate 12, respectively. The auxiliary plate 12 is connected to the valve core shaft through a connecting rod, and the connecting member 8 is arranged inside the expansion joint. One end of the expansion joint is connected to the high-pressure gas inlet 5 through a gas path member.

[0050] When the smoke needs to be cut off, the valve core rotating actuator 4 rotates the valve core to the smoke closing position, the high pressure gas inlet 5 connects the high pressure gas, when the gas source is connected, the high pressure gas pushes the expansion joint 7 to extend, the valve plate 1 connected by the connecting member 8 moves relative to the valve body 3 between the opening and closing smoke inlet 9, smoke outlet 11 positions, in the closing fluid through port position, the valve plate 1 is sealed by the cooperation of the side and the valve body sealing surface 6,

[0051] When the smoke needs to be opened, the high pressure gas inlet 5 is cut off, the reset spring 10 exerts a pulling force, the expansion joint 7 is shortened, and the connecting member 8 is shortened. The valve plate 1 is separated from the valve body sealing surface 6, the valve core rotating actuator 4 rotates the valve core to the smoke flow position, and the smoke flow channel is opened.

[0052] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as a preferred embodiment, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the above disclosed technical content without departing from the scope of the present application, and any simple modification, equivalent change and modification of the above embodiment based on the technical essence of the present application are still within the scope of the present application.

Claims

1. A flue gas damper valve comprising a valve body and a valve core, the valve body being provided with flue gas inlet and outlet ports, characterized in that: The valve core comprises a valve core rotation actuator and valve plates arranged at both ends of the rotation shaft, the valve plates are provided with valve plate movement actuators, the rotation shaft center of the valve core is connected to the valve core rotation actuator arranged at the top of the valve body through a transmission shaft, the valve plate movement actuator comprises a valve plate driving mechanism cavity and a connecting member, the valve plate driving mechanism cavity is composed of an expansion joint, a valve plate and an auxiliary plate, the auxiliary plate is connected to the valve core rotation shaft, and the connecting member is composed of an extension arm and a guide rail, the extension arm and the guide rail are connected to the valve plate and the auxiliary plate respectively.

2. A flue gas damper according to claim 1, characterised in that: The valve plate driving mechanism cavity is further provided with a reset spring.

3. A flue gas damper according to claim 1, wherein: A sealing surface and a fluid passing port are arranged in the cross section of the valve body capable of cutting off the fluid channel, and the sealing surface is arranged around the fluid passing port; a flexible sealing ring is arranged at the abutment position of the valve plate and the sealing surface; an arc-shaped groove suitable for clamping the flexible sealing ring is arranged at the position where the flue gas inlet and the flue gas outlet are matched with the flexible sealing ring.

4. A flue gas damper according to claim 1, wherein: The valve plate movement mechanism of the single-piece valve plate is composed of a single expansion joint and a single connecting member, the two ends of the connecting member and the two ends of the expansion joint are connected to the valve plate and the auxiliary plate respectively, the auxiliary plate is connected to the valve core rotation shaft through a connecting rod, and the guide rail is arranged in the expansion joint.

5. A flue gas damper according to claim 1, wherein: The valve plate movement mechanism of the single-piece valve plate is composed of a single connecting member and multiple expansion joints, the two ends of the connecting member and the two ends of the expansion joints are connected to the valve plate and the auxiliary plate respectively, the auxiliary plate is connected to the valve core rotation shaft through a connecting rod, and the expansion joints are distributed along the circumference of the guide rail.

6. A flue gas damper according to claim 5, wherein: The number of expansion joints is N, and 2≤N≤100.

7. A flue gas damper according to claim 1, wherein: The movement mechanism of the single-piece valve plate is composed of equal numbers of expansion joints and connecting members, the two ends of the connecting members and the two ends of the expansion joints are connected to the valve plate and the auxiliary plate respectively, the auxiliary plate is connected to the valve core rotation shaft through a connecting rod, and the connecting members are arranged in the expansion joints.

8. A flue gas damper according to claim 7, characterised in that: The number of expansion joints and connecting members is N, and 2≤N≤100.

9. A flue gas damper according to claim 1, wherein: The valve plate is an arc-shaped plate or a flat plate.

10. A flue gas damper according to claim 1, wherein: The flue gas cut-off valve is provided with a gas path member, one end of the gas path member is connected to the expansion joint, and the other end penetrates through the valve body to connect to an external gas source.

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