Double-core adjustable shrinkage cavity

Abstract

The embodiment of the utility model discloses a double-core adjustable shrinkage cavity which comprises a valve body, a core plate and a driving structure. The core plate is movably arranged in the valve body, a connecting piece is connected to the core plate and penetrates through the valve body, and one end of the connecting piece is located outside the valve body. The driving structure is connected to the valve body, the driving structure is provided with a driving end, the driving end is connected with the connecting piece located outside the valve body, and the driving end can drive the connecting piece to move relative to the valve body so that the connecting piece can drive the core plate to move in the valve body. According to the technical scheme, the core plate and the driving structure can be arranged inside and outside the valve body respectively, direct connection of the core plate and the driving structure is avoided, the core plate and the driving structure can be prevented from being blocked due to accumulation of pulverized coal, flexible adjustment of the adjustable shrinkage cavity is guaranteed, and normal operation of the adjustable shrinkage cavity can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of coal-fired power generation technology, and in particular to a dual-core adjustable shrinkage orifice. Background Technology

[0002] The adjustable orifice on the pulverized coal pipeline of a coal-fired power unit is mainly used to adjust the diameter of the pulverized coal channel. It mainly includes a shell, a core plate movably set in the shell, and a driving component for moving the core plate. In related technologies, the core plate of the adjustable orifice passes through the shell, and in order to drive the core plate to move, part of the driving component passes through the shell and is set in the shell, and is connected to the core plate in the shell for transmission.

[0003] During the unit's service life, adjustments are rarely made, except during unit commissioning, power field testing, or a single air leveling operation. As a result, the unit is not switched on or off for extended periods. Furthermore, since the core plate and drive components are both embedded in the housing, coal dust easily accumulates at the connection points between the core plate and the housing, and between the drive components and the housing. This leads to jamming at the connections, inflexible adjustments, and in severe cases, complete seizure. Utility Model Content

[0004] Based on this, it is necessary to propose a dual-core adjustable shrinkage orifice that is flexible in adjustment and not prone to jamming, in order to address the above problems.

[0005] This utility model embodiment provides a dual-core adjustable shrinkage orifice, including:

[0006] Valve body;

[0007] A core plate, movably disposed within the valve body, is connected to a connector, the connector passing through the valve body, with one end of the connector located outside the valve body; and

[0008] A drive structure is connected to the valve body. The drive structure has a drive end, which is connected to a connector located outside the valve body. The drive end can drive the connector to move relative to the valve body, so that the connector can drive the core plate to move within the valve body.

[0009] In some embodiments, the valve body includes a housing and an end cap, the housing and the end cap forming a movable cavity, the core plate being movable within the movable cavity, and the connector penetrating through the end cap.

[0010] In some embodiments, a sealing structure is further included, the sealing structure including a mounting member connected to the end cap, the connector passing through the mounting member, and the sealing structure further including a first sealing member and a second sealing member connected to the mounting member, the first sealing member and the second sealing member being sleeved on the connector.

[0011] In some embodiments, the mounting member is provided with a mounting hole, and the first seal and the second seal are connected to the mounting hole by an interference fit.

[0012] In some embodiments, one end of the mounting member is provided with a retaining edge, and the other end is connected to a clamping member. The first sealing member and the second sealing member are located between the retaining edge and the clamping member, and the first sealing member abuts against the clamping member, and the second sealing member abuts against the retaining edge.

[0013] In some embodiments, a support member is also connected to the end cap, the support member pressing the mounting member onto the end cap.

[0014] In some embodiments, the drive structure includes an active member and a transmission member, the transmission member being connected to the connecting member, and the active member being connected to the support member and drivingly connected to the transmission member.

[0015] In some embodiments, the driving member is a nut and is rotatably connected to the support member. The nut is also connected to a driving part, the transmission member is a lead screw, and the nut is screwed to the lead screw.

[0016] In some embodiments, the housing is provided with a powder inlet and a powder outlet communicating with the movable cavity, and the housing is also provided with an observation port communicating with the movable cavity.

[0017] In some embodiments, a scale is provided on the end cap, and an indicator is provided on the core plate. The indicator passes through the end cap, and the scale is located on the movement path of the indicator. The scale can cooperate with the indicator to measure the movement distance of the core plate.

[0018] The present invention has the following beneficial effects:

[0019] Based on the dual-core adjustable orifice in the above embodiments, by setting a connector to connect the core plate and the drive structure, the core plate and the drive structure can be respectively set inside the valve body and outside the valve body, avoiding direct connection between the core plate and the drive structure. This can prevent the core plate and the drive structure from getting stuck due to coal powder accumulation, ensuring that the adjustable orifice can be flexibly adjusted and can operate normally. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] in:

[0022] Figure 1 A cross-sectional view of a dual-core adjustable shrinkage orifice provided according to the present invention is shown;

[0023] Figure 2 Figure 1 Enlarged view of point A in the middle;

[0024] Figure 3 A side view of the dual-core adjustable shrinkage hole provided according to the present invention is shown.

[0025] Explanation of key component symbols:

[0026] 1. Valve body; 11. Housing; 111. Observation port; 112. Guide structure; 113. Powder inlet; 114. Powder outlet; 115. Movable cavity; 12. End cap; 121. Scale; 2. Core plate; 21. Marking element; 3. Connecting element; 4. Drive structure; 41. Active element; 411. Drive unit; 42. Transmission element; 5. Support element; 6. Sealing structure; 61. Mounting element; 611. Edge retainer; 62. First sealing element; 63. Second sealing element; 64. Clamping element. Detailed Implementation

[0027] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0028] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] This invention provides a dual-core adjustable shrinkage orifice, which can be applied to the pulverized coal pipeline of a coal-fired power plant to adjust the size of the channel during pulverized coal transportation.

[0031] In one embodiment, please refer to Figures 1 to 3 The dual-core adjustable orifice includes a valve body 1, a core plate 2, and a drive structure 4. The valve body 1 is the overall structure of the dual-core adjustable orifice and is used to connect to the pulverized coal pipeline.

[0032] The core plate 2 is movably disposed inside the valve body 1. Generally, two core plates 2 are disposed inside the valve body 1. The two core plates 2 can move relative to each other or towards each other, and a gap is formed between the two core plates 2. Coal powder can pass through the gap. When the two core plates 2 move relative to each other, the gap will shrink. When the two core plates 2 move towards each other, the gap will increase, thereby adjusting the size of the channel through which the coal powder passes.

[0033] In this application, both core plates 2 are located inside the valve body 1, and a connector 3 is connected to the core plate 2. The connector 3 passes through the valve body 1, and one end of the connector 3 is located outside the valve body 1. In this way, the core plate 2 can be driven to move inside the valve body 1 by driving the connector 3 from outside the valve body 1.

[0034] In addition, the drive structure 4 is connected to the valve body 1 and located outside the valve body 1. The drive structure 4 has a drive end, which is connected to the connector 3 located outside the valve body 1. The drive end can drive the connector 3 to move relative to the valve body 1 so that the connector 3 can drive the core plate 2 to move inside the valve body 1.

[0035] It should be noted that both core boards 2 are connected to connectors 3, and the two core boards 2 are driven by two drive structures 4 respectively.

[0036] In this application, the core plate 2 is completely disposed within the valve body 1, and the drive structure 4 is completely disposed outside the valve body 1. The core plate 2 is connected to the drive structure 4 via a connector 3, allowing the drive structure 4 to move the core plate 2 within the valve body 1 using the connector 3. In this way, compared to the prior art where the core plate 2 is inserted into the valve body 1, this application restricts the movement of the core plate 2 within the valve body 1, preventing coal dust accumulation at the contact point between the core plate 2 and the valve body 1, which could lead to difficulty in movement or even jamming of the core plate 2. Furthermore, compared to the prior art where part of the drive structure 4 is inserted into the valve body 1, the drive structure 4 in this application is also disposed outside the valve body 1, preventing coal dust accumulation at the connection point between the drive structure 4 and the valve body 1, which could lead to difficulty in driving the drive structure 4 or even jamming.

[0037] In summary, by setting the connector 3 to connect the core plate 2 and the drive structure 4, this application can realize that the core plate 2 and the drive structure 4 are respectively set inside the valve body 1 and outside the valve body 1, avoiding direct connection between the core plate 2 and the drive structure 4. This can prevent the core plate 2 and the drive structure 4 from getting stuck due to coal powder accumulation, ensuring the flexible adjustment of the adjustable orifice and ensuring its normal operation.

[0038] In one embodiment, please refer to Figures 1 to 3 The valve body 1 includes a housing 11 and an end cap 12. The housing 11 is hollow and preferably rectangular in shape. One pair of opposite ends of the housing 11 are open, and the end cap 12 can be connected to the two ends by screws. In this way, a movable cavity 115 can be formed between the housing 11 and the end cap 12. The core plate 2 moves within the movable cavity 115, and the connecting member 3 passes through the end cap 12.

[0039] It should be noted that the other two opposite ends of the housing 11 are respectively provided with a powder inlet 113 and a powder outlet 114, both of which are connected to the movable chamber 115. When the valve body 1 is connected to the pulverized coal pipe, the powder inlet 113 is used for the pulverized coal in the pipe to enter the movable chamber 115, and the pulverized coal in the movable chamber 115 can flow out from the powder outlet 114 into another pipe. The housing 11 is also provided with an observation port 111 that communicates with the movable chamber 115. In order to prevent the pulverized coal in the housing 11 from leaking, a cover needs to be provided at the observation port 111 to cover it.

[0040] The end cap 12 is detachably connected to the housing 11, which makes it easy to install and remove the end cap 12 so as to clean and inspect the inside of the housing 11. By opening the observation port 111, it is easy to observe whether the inside of the housing 11 is clean.

[0041] To ensure smooth movement of the core plate 2 within the valve body 1, a guide structure 112 is provided within the valve body 1 along the movement path of the core plate 2. The guide structure 112 preferably consists of rollers rotatably mounted within the valve body 1. A row of guide structures 112 is provided at both the upper and lower ends of the core plate 2 within the valve body 1, with each end of the core plate 2 contacting its corresponding roller. The two rows of guide structures 112 form a guide track for the core plate 2. The contact between the core plate 2 and the rollers is a rolling friction, resulting in relatively low frictional force, which further facilitates smoother movement of the core plate 2 within the valve body 1.

[0042] In one embodiment, please refer to Figures 1 to 3 In order to make the connector 3 move more smoothly within the end cap 12, the connector 3 is preferably a smooth rod structure, and its flexible movement can usually be ensured by applying lubricant between the connector 3 and the end cap 12.

[0043] In addition, to ensure that the pulverized coal in the movable cavity 115 does not leak between the connector 3 and the end cap 12, the adjustable orifice also includes a sealing structure 6. The sealing structure 6 includes a mounting member 61 connected to the end cap 12, and the connector 3 passes through the mounting member 61. The sealing structure 6 also includes a first sealing member 62 and a second sealing member 63 connected to the mounting member 61, and both the first sealing member 62 and the second sealing member 63 are sleeved on the connector 3.

[0044] The first sealing element 62 and the second sealing element 63 are preferably O-rings or V-rings, and they can be the same type of sealing ring or different sealing rings. The number of the first sealing element 62 and the second sealing element 63 is not limited. In this embodiment, there is one first sealing element 62 and two second sealing elements 63.

[0045] In one specific embodiment, the mounting member 61 is provided with a mounting hole, and the first seal 62 and the second seal 63 are connected to the mounting hole by an interference fit.

[0046] To ensure the stability of the first seal 62 and the second seal 63, a retaining flange 611 is provided at one end of the mounting member 61 near the end cap 12, and a clamping member 64 is connected to the other end. The clamping member 64 can be connected to the mounting member 61 by means of snap-fit, clip-fit, or screw connection, or in this embodiment, the end of the clamping member 64 is connected to the mounting hole by an interference fit. The first seal 62 and the second seal 63 are located between the retaining flange 611 and the clamping member 64, with the first seal 62 abutting against the clamping member 64 and the second seal 63 abutting against the retaining flange 611. In this way, the clamping action of the retaining flange 611 and the clamping member 64 makes it difficult for the first seal 62 and the second seal 63 to detach from the mounting member 61.

[0047] It should be noted that a support member 5 is also connected to the end cover 12. The support member 5 can be connected to the end cover 12 by screws. When the support member 5 is connected to the end cover 12, one end can press the mounting member 61 onto the end cover 12. In this way, the mounting member 61 can be fixed onto the end cover 12 by the action of the support member 5.

[0048] In one embodiment, please refer to Figures 1 to 3 The drive structure 4 includes an active component 41 and a transmission component 42. The transmission component 42 is connected to the connecting component 3, and the active component 41 is connected to the support component 5 and is drively connected to the transmission component 42. The active component 41 can drive the transmission component 42 to move, and the transmission component 42 can output a force along the moving direction of the core plate 2 and the connecting component 3, thereby driving the connecting component 3 to move.

[0049] Specifically, the driving component 41 is preferably a nut, and is rotatably connected to the end of the support 5 away from the end cap 12. The transmission component 42 is a lead screw, one end of which is fixedly connected to the connecting component 3, and the other end is screwed to the nut. When the nut rotates, it can drive the lead screw to move through the nut, thereby driving the connecting component 3 to move. It should be noted that a driving part 411 is also fixedly connected to the nut. In this embodiment, the driving part 411 is preferably a handwheel structure, which is used for the user to hold and easily rotate the nut.

[0050] In one embodiment, the end cap 12 is further provided with a scale 121, which has graduations for measuring distance. The scale 121 extends along the moving direction of the core plate 2. The core plate 2 is provided with an indicator 21, which passes through the end cap 12. The scale 121 is located on the moving path of the indicator 21. When the core plate 2 moves, the indicator 21 can indicate the graduations on the scale 121. Thus, by cooperating with the scale 121 and the indicator 21, the moving distance of the core plate 2 can be measured to understand the degree of opening and closing between the core plates 2, which facilitates the control of the opening and closing size between the core plates 2.

[0051] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A dual-core adjustable shrinkage orifice, characterized in that, include: Valve body; A core plate is movably disposed within the valve body. A connector is connected to the core plate, the connector passes through the valve body, and one end of the connector is located outside the valve body. as well as A drive structure is connected to the valve body. The drive structure has a drive end and is connected to a connector located outside the valve body. The drive end can drive the connector to move relative to the valve body so that the connector can drive the core plate to move inside the valve body. The valve body includes a housing and an end cap, the housing and the end cap forming a movable cavity. The housing is provided with a powder inlet and a powder outlet communicating with the movable cavity, and the housing is also provided with an observation port communicating with the movable cavity.

2. The dual-core adjustable shrinkage orifice according to claim 1, characterized in that, The core plate is movable within the movable cavity, and the connector extends through the end cap.

3. The dual-core adjustable shrinkage orifice according to claim 2, characterized in that, It also includes a sealing structure, which includes a mounting member connected to the end cap, a connecting member passing through the mounting member, and a first sealing member and a second sealing member connected to the mounting member, both of which are sleeved on the connecting member.

4. The dual-core adjustable shrinkage orifice according to claim 3, characterized in that, The mounting component is provided with a mounting hole, and the first seal and the second seal are connected to the mounting hole by an interference fit.

5. The dual-core adjustable shrinkage orifice according to claim 4, characterized in that, One end of the mounting component is provided with a retaining edge, and the other end is connected to a clamping member. The first sealing member and the second sealing member are located between the retaining edge and the clamping member, and the first sealing member abuts against the clamping member, while the second sealing member abuts against the retaining edge.

6. The dual-core adjustable shrinkage orifice according to claim 3, characterized in that, A support member is also connected to the end cap, which presses the mounting member onto the end cap.

7. The dual-core adjustable shrinkage orifice according to claim 6, characterized in that, The drive structure includes an active component and a transmission component. The transmission component is connected to the connecting component, and the active component is connected to the support component and is in a transmission connection with the transmission component.

8. The dual-core adjustable shrinkage orifice according to claim 7, characterized in that, The driving component is a nut, which is rotatably connected to the support component. A driving part is also connected to the nut. The transmission component is a lead screw, and the nut is screwed to the lead screw.

9. The dual-core adjustable shrinkage orifice according to claim 1, characterized in that, A scale is provided on the end cap, and an indicator is provided on the core plate. The indicator passes through the end cap, and the scale is located on the moving path of the indicator. The scale can cooperate with the indicator to measure the moving distance of the core plate.

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