Coal mill outlet coal valve and coal mill

Abstract

The invention belongs to the technical field of coal mills, and particularly discloses a coal mill outlet coal valve. The coal mill outlet coal valve comprises a coal valve driving part, a valve body, two magnetic switches and a signal triggering part, the valve body is connected with the coal valve driving part, the signal triggering part is arranged on the valve body, and the two magnetic switches are arranged on one side of the valve body in a spaced mode in the first direction; the first direction is consistent with the opening-closing direction of the valve body; when the valve body is in an open state, the signal triggering piece is arranged opposite to one of the two magnetic switches so as to trigger the corresponding magnetic switch; when the valve body is in a closed state, the signal triggering piece is arranged opposite to the other one of the two magnetic switches so as to trigger the corresponding magnetic switch. According to the outlet coal valve of the coal mill, the stability of position signal measurement of the valve body is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mills, and in particular relates to a coal mill outlet coal valve and a coal mill. Background Art

[0002] In the related art, the position signal triggering device of the coal valve at the outlet of the coal mill adopts a mechanical stroke switch, and the position signal of the valve body is triggered by the impact rod on the valve body touching the stroke switch. However, during the process of the valve body switching, the position of the valve body will change by 3cm-5cm, so that the impact rod on the valve body cannot normally trigger the stroke switch, affecting the judgment of the position of the valve body. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides a coal valve at a coal mill outlet, which can improve the stability of the valve body position signal measurement.

[0004] An embodiment of the present invention further provides a coal mill.

[0005] The coal valve at a coal mill outlet according to an embodiment of the present invention comprises a coal valve driving member, a valve body, a magnetic switch and a signal triggering member, wherein the valve body is connected to the coal valve driving member, the signal triggering member is arranged on the valve body, two magnetic switches are arranged at intervals on one side of the valve body along a first direction, and the first direction is consistent with the switching direction of the valve body; in the open state of the valve body, the signal triggering member is arranged relative to one of the two magnetic switches to trigger the corresponding magnetic switch; in the closed state of the valve body, the signal triggering member is arranged relative to the other of the two magnetic switches to trigger the corresponding magnetic switch.

[0006] When the coal powder pipeline needs to be opened, the valve body is driven to the open position by the coal valve driving component. When the valve body moves to the open position, the signal trigger component triggers the magnetic switch in the open position, so that the signal that the valve body is in the open state can be obtained according to the magnetic switch; when the coal powder pipeline needs to be closed, the valve body is driven to the closed position by the coal valve driving component. When the valve body moves to the closed position, the signal trigger component triggers the magnetic switch in the closed position, so that the signal that the valve body is in the closed state can be obtained according to the magnetic switch. The signal trigger component can trigger the magnetic switch when it is close to the magnetic switch, and the factors affected by the distance between the signal trigger component and the magnetic switch are small, which is conducive to making the position signal measurement of the coal valve body more stable and ensuring stable transmission of the position signal.

[0007] In this embodiment, the coal valve at the coal mill outlet also includes a first mounting plate, the signal trigger is installed on the valve body through the first mounting plate, the first mounting plate is L-shaped, and the signal trigger is arranged at one end of the first mounting plate away from the valve body.

[0008] In this embodiment, the coal valve at the coal mill outlet also includes a slide seat, the signal trigger component is arranged on the slide seat, a first slide groove is arranged on the first mounting plate, the first slide groove extends along a second direction perpendicular to the first direction, and the slide seat is installed in the first slide groove and is movable relative to the first mounting plate.

[0009] In this embodiment, the coal valve at the coal mill outlet also includes a second mounting plate, and the two magnetic switches are respectively arranged on one side of the valve body through one of the second mounting plates, and a second slide groove is arranged on the second mounting plate. The magnetic switch is connected to the second mounting plate through a connecting piece that passes through the second slide groove. When the connecting piece is released, the magnetic switch can move along the second slide groove. The extension direction of the second slide groove is a third direction, and the third direction is arranged orthogonally to the first direction and the second direction.

[0010] In this embodiment, the coal valve at the coal mill outlet further includes a support plate, which is arranged on the coal valve seat, and the magnetic switch is arranged on the support plate, and scale lines are arranged on the support plate along the first direction and the third direction.

[0011] In this embodiment, the signal triggering member includes a connecting rod and a triggering head, the connecting rod is connected to the valve body, the connecting rod is a threaded rod, and the triggering head is threadedly connected to the connecting rod.

[0012] In this embodiment, the coal valve at the coal mill outlet further includes a cleaning component, wherein the cleaning component is arranged on the valve body, and an air blowing port of the cleaning component is located on one side of the signal triggering member.

[0013] In this embodiment, the cleaning assembly includes a solenoid valve, an air supply pipe and an air blowing nozzle, one end of the air supply pipe is connected to an air source, the solenoid valve is arranged on the air supply pipe, the air blowing nozzle is connected to the air supply pipe, the air blowing nozzle is arranged on the valve body and the outlet of the air blowing nozzle is arranged opposite to the magnetic switch.

[0014] In this embodiment, the cleaning component further includes a filter, which is disposed on the air supply pipeline and located upstream of the solenoid valve.

[0015] The coal mill in this embodiment includes the above-mentioned coal mill outlet coal valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of a coal valve at a coal mill outlet according to an embodiment of the present invention.

[0017] Figure 2 It is a structural schematic diagram of a first mounting plate, a sliding seat and a signal triggering member of a coal valve at a coal mill outlet according to an embodiment of the present invention.

[0018] Reference numerals:

[0019] 1. Coal valve drive; 2. Valve body; 3. Magnetic switch; 4. Signal trigger; 41. Connecting rod; 42. Trigger head; 5. First mounting plate; 6. Sliding seat; 7. Second mounting plate; 8. Support plate; 9. Cleaning assembly; 10. Coal powder pipeline. DETAILED DESCRIPTION

[0020] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0021] In this embodiment, if Figure 1 and Figure 2 As shown in the figure, the X direction is the first direction, the Y direction is the third direction, and the Z direction is the second direction. The coal valve at the outlet of the coal mill includes a coal valve driver 1, a valve body 2, a magnetic switch 3 and a signal trigger 4. The valve body 2 is connected to the coal valve driver 1. The signal trigger 4 is arranged on the valve body 2. Two magnetic switches 3 are arranged at intervals along a first direction on one side of the valve body 2. The first direction is consistent with the switching direction of the valve body 2. In the open state of the valve body 2, the signal trigger 4 is arranged relative to one of the two magnetic switches 3 to trigger the corresponding magnetic switch 3. In the closed state of the valve body 2, the signal trigger 4 is arranged relative to the other of the two magnetic switches 3 to trigger the corresponding magnetic switch 3.

[0022] For example, the coal valve driver 1 may be a cylinder, which drives the valve body 2 to open and close through the extension and contraction of the cylinder lever, thereby controlling the on and off of the coal powder pipeline 10 through the valve body 2. Of course, the coal valve driver 1 may also be configured in other forms, which are not limited here.

[0023] Specifically, the signal trigger 4 has a magnetic part to trigger the magnetic switch 3 when the signal trigger 4 is close to the magnetic switch 3. The structure and working principle of the signal trigger 4 and the magnetic switch 3 are conventional prior art and will not be described in detail here.

[0024] When the pulverized coal pipeline 10 needs to be opened, the valve body 2 is driven to move to the open position by the coal valve driving component 1. When the valve body 2 moves to the open position, the signal triggering component 4 triggers the magnetic switch 3 in the open position, so that the signal that the valve body 2 is in the open state can be obtained according to the magnetic switch 3; when the pulverized coal pipeline 10 needs to be closed, the valve body 2 is driven to move to the closed position by the coal valve driving component 1. When the valve body 2 moves to the closed position, the signal triggering component 4 triggers the magnetic switch 3 in the closed position, so that the signal that the valve body 2 is in the closed state can be obtained according to the magnetic switch 3. The signal triggering component 4 can trigger the magnetic switch 3 when it is close to the magnetic switch 3, and the factors affected by the distance between the signal triggering component 4 and the magnetic switch 3 are relatively small, which is conducive to making the position signal measurement of the coal valve body more stable and ensuring the stable transmission of the position signal.

[0025] In this embodiment, if Figure 1 and Figure 2 As shown, the coal valve at the coal mill outlet also includes a first mounting plate 5, through which the signal trigger 4 is mounted on the valve body 2. The first mounting plate 5 is L-shaped, and the signal trigger 4 is arranged at one end of the first mounting plate 5 away from the valve body 2.

[0026] For example, the first mounting plate 5 is connected to the valve body 2 by bolts, which can facilitate the installation and removal of the first mounting plate 5, thereby facilitating the adjustment of the position of the first mounting plate 5 as needed.

[0027] It can be understood that setting the first mounting plate 5 to be L-shaped makes it convenient to connect one end of the first mounting plate 5 to the valve body 2, and the other end of the first mounting plate 5 can facilitate the installation of the signal trigger 4. The first mounting plate 5 can be formed in one piece, making the first mounting plate 5 easier to process.

[0028] In this embodiment, if Figure 1 and Figure 2 As shown, the coal valve at the coal mill outlet also includes a slide seat 6, the signal trigger member 4 is arranged on the slide seat 6, a first slide groove is arranged on the first mounting plate 5, the first slide groove extends along a second direction perpendicular to the first direction, and the slide seat 6 is installed in the first slide groove and is movable relative to the first mounting plate 5.

[0029] For example, the slide 6 may be a dovetail slide 6, and the first slide groove may be a dovetail groove matching the slide 6. By setting the slide 6 and the first slide groove to be dovetail shapes that match each other, the slide 6 may be able to move stably along the first slide groove when it needs to move.

[0030] Specifically, the slide 6 is fixed to the first mounting plate 5 by a fastener (not shown in the figure), and the fastener is a screw, which is threadedly connected to the first mounting plate 5. When the fastener is tightened so that the fastener abuts against the slide 6, the slide 6 can be fixed. When the fastener is loosened, the slide 6 can be moved along the first mounting plate 5.

[0031] It should be noted that, since the slide 6 can be moved relative to the first mounting plate 5, the position of the signal trigger 4 can be adjusted by moving the slide 6 so that the position of the signal trigger 4 in the second direction corresponds to the magnetic switch 3, so that when the signal trigger 4 moves to the open state or the closed state of the valve body 2, the magnetic switch 3 can be triggered more accurately.

[0032] In this embodiment, if Figure 1 As shown, the coal valve at the coal mill outlet also includes a second mounting plate 7. Two magnetic switches 3 are respectively arranged on one side of the valve body 2 through a second mounting plate 7. A second slide groove is arranged on the second mounting plate 7. The magnetic switch 3 is connected to the second mounting plate 7 through a connecting piece that penetrates the second slide groove. When the connecting piece is released, the magnetic switch 3 can move along the second slide groove. The extension direction of the second slide groove is the third direction, which is arranged orthogonal to the first direction and the second direction.

[0033] Specifically, the third direction is the distribution direction of the signal trigger member 4 and the magnetic switch 3 . When the magnetic switch 3 moves along the third direction, the distance between the signal trigger member 4 and the magnetic switch 3 in the third direction can be adjusted.

[0034] It can be understood that when the valve body 2 is in the open state or the closed state, the distance between the signal trigger 4 and the corresponding magnetic switch 3 is far, and the signal trigger 4 cannot stably trigger the magnetic switch 3, the connecting piece on the corresponding magnetic switch 3 can be loosened according to actual needs, so that the magnetic switch 3 moves along the second slide groove to the preset position, and then the magnetic switch 3 is fixed by the connecting piece. By setting the second slide groove, the magnetic switch 3 can be moved along the second slide groove, which can facilitate the adjustment of the distance between the magnetic switch 3 and the signal trigger 4 in the third direction, thereby helping to improve the accuracy of the feedback signal of the signal trigger 4 and the magnetic switch 3.

[0035] In this embodiment, if Figure 1 As shown, the coal valve at the coal mill outlet further includes a support plate 8, which is arranged on the coal valve seat, and the magnetic switch 3 is arranged on the support plate 8, and scale lines are arranged on the support plate 8 along the first direction and the third direction.

[0036] Specifically, the second mounting plate 7 is fixed on the supporting plate 8 , and the magnetic switch 3 is fixed on the supporting plate 8 through the second mounting plate 7 .

[0037] It is understandable that by setting scale lines along the first direction on the support plate 8, the distance between the two magnetic switches 3 can be adjusted according to the scale lines, so that the position setting of the two magnetic switches 3 in the first direction is more accurate, so that the two magnetic switches 3 can respectively accurately correspond to the open state and the closed state of the valve body 2. By setting scale lines along the third direction on the support plate 8, the position of the magnetic switch 3 along the third direction can be accurately adjusted, so that the distance between the signal trigger 4 and the magnetic switch 3 in the second direction better meets the use requirements, which is conducive to improving the accuracy of the feedback signal of the signal trigger 4 and the magnetic switch 3.

[0038] In this embodiment, if Figure 1 and Figure 2 As shown, the signal triggering member 4 includes a connecting rod 41 and a triggering head 42 . The connecting rod 41 is connected to the valve body 2 . The connecting rod 41 is a threaded rod. The triggering head 42 is threadedly connected to the connecting rod 41 .

[0039] Specifically, the connecting rod 41 is connected to the first mounting plate 5. Further, the connecting rod 41 is connected to the slide 6, and the slide 6 drives the trigger head 42 to move through the connecting rod 41.

[0040] In this example, the trigger head 42 and the connecting rod 41 are connected by threads, which facilitates the installation and removal of the trigger head 42 and the connecting rod 41. In addition, the trigger head 42 and the connecting rod 41 are connected by threads, and the total length of the signal trigger member 4 can be fine-tuned by rotating the trigger head 42, so that the distance between the signal trigger member 4 and the magnetic switch 3 in the third direction can be adjusted more accurately.

[0041] In this embodiment, if Figure 1 As shown, the coal valve at the coal mill outlet also includes a cleaning component 9, which is arranged on the valve body 2, and the air blowing port of the cleaning component 9 is located on one side of the signal trigger 4 to blow air to the magnetic switch 3 through the air blowing port.

[0042] Specifically, the blowing port of the cleaning component 9 is set toward the magnetic switch 3. When the signal trigger 4 moves to be opposite to the corresponding magnetic switch 3, the cleaning component 9 can blow air toward the magnetic switch 3 through the blowing port to blow off the dust on the magnetic switch 3 and avoid dust accumulation on the magnetic switch 3.

[0043] By setting up the cleaning component 9, when the signal trigger 4 moves to correspond to one of the two magnetic switches 3, the cleaning component 9 can blow air through the blowing port to the magnetic switch 3 opposite to the blowing port, so as to avoid the accuracy of signal feedback being affected by too thick dust accumulation on the magnetic switch 3.

[0044] In this embodiment, the cleaning component 9 includes a solenoid valve, an air supply pipe and a blowing nozzle. One end of the air supply pipe is connected to the air source. The solenoid valve is arranged on the air supply pipe. The blowing nozzle is connected to the air supply pipe. The blowing nozzle is arranged on the valve body 2 and the outlet of the blowing nozzle is arranged opposite to the magnetic switch 3.

[0045] Specifically, when the signal trigger 4 moves to a position corresponding to any one of the two magnetic switches 3, the solenoid valve controls the air nozzle to blow air so that the signal trigger 4 moves to each magnetic switch 3 and cleans the magnetic switch 3 to reduce the impact of dust on the signal feedback result.

[0046] It is understandable that by arranging a solenoid valve on the air supply pipeline, the on-off of the air supply pipeline can be controlled by the solenoid valve, thereby facilitating control of whether the blowing nozzle blows air.

[0047] In this embodiment, the cleaning component 9 further includes a filter (not shown in the figure), which is arranged on the air supply pipeline and located upstream of the solenoid valve.

[0048] It is understandable that by setting a filter, dust in the air can be filtered out, making the air blown out from the air outlet cleaner, thereby achieving a better cleaning effect without increasing the environmental burden.

[0049] The coal mill in this embodiment includes the above-mentioned coal mill outlet coal valve.

[0050] Specifically, the connection or closing of the pulverized coal pipeline 10 of the coal mill is controlled by the valve body 2 of the coal valve at the coal mill outlet.

[0051] When the coal machine in this embodiment is used, when the coal powder pipeline 10 needs to be opened, the valve body 2 is driven to move to the open position by the coal valve driving component 1. When the valve body 2 moves to the open position, the signal triggering component 4 triggers the magnetic switch 3 in the open position, so that the signal that the valve body 2 is in the open state can be obtained according to the magnetic switch 3; when the coal powder pipeline 10 needs to be closed, the valve body 2 is driven to move to the closed position by the coal valve driving component 1. When the valve body 2 moves to the closed position, the signal triggering component 4 triggers the magnetic switch 3 in the closed position, so that the signal that the valve body 2 is in the closed state can be obtained according to the magnetic switch 3. The signal triggering component 4 can trigger the magnetic switch 3 when it is close to the magnetic switch 3, and the factors affected by the distance between the signal triggering component 4 and the magnetic switch 3 are relatively small, which is conducive to making the position signal measurement of the coal valve body more stable and ensuring the stable transmission of the position signal.

[0052] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0056] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0057] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A coal valve at a coal mill outlet, characterized in that: It comprises a coal valve driving member, a valve body, a magnetic switch and a signal triggering member, wherein the valve body is connected to the coal valve driving member, the signal triggering member is arranged on the valve body, two magnetic switches are arranged at intervals on one side of the valve body along a first direction, and the first direction is consistent with the switch direction of the valve body; In the open state of the valve body, the signal triggering member is arranged relative to one of the two magnetic switches to trigger the corresponding magnetic switch; in the closed state of the valve body, the signal triggering member is arranged relative to the other of the two magnetic switches to trigger the corresponding magnetic switch.

2. The coal valve at the coal mill outlet according to claim 1, characterized in that: It also includes a first mounting plate, the signal triggering member is mounted on the valve body through the first mounting plate, the first mounting plate is L-shaped, and the signal triggering member is arranged at one end of the first mounting plate away from the valve body.

3. The coal valve at the coal mill outlet according to claim 2, characterized in that: It also includes a slide seat, the signal triggering member is arranged on the slide seat, a first slide groove is arranged on the first mounting plate, the first slide groove extends along a second direction perpendicular to the first direction, and the slide seat is installed in the first slide groove and is movable relative to the first mounting plate.

4. The coal valve at the coal mill outlet according to claim 3, characterized in that: It also includes a second mounting plate, and the two magnetic switches are respectively arranged on one side of the valve body through one of the second mounting plates, and a second slide groove is arranged on the second mounting plate. The magnetic switch is connected to the second mounting plate through a connecting piece that passes through the second slide groove. When the connecting piece is released, the magnetic switch can move along the second slide groove. The extension direction of the second slide groove is a third direction, and the third direction is arranged orthogonally to the first direction and the second direction.

5. The coal valve at the coal mill outlet according to claim 4, characterized in that: It also includes a support plate, which is arranged on the coal valve seat, and the magnetic switch is arranged on the support plate. The support plate is provided with scale lines along the first direction and the third direction.

6. The coal valve at the coal mill outlet according to claim 1, characterized in that: The signal triggering member comprises a connecting rod and a triggering head, wherein the connecting rod is connected to the valve body, the connecting rod is a threaded rod, and the triggering head is threadedly connected to the connecting rod.

7. The coal valve at the coal mill outlet according to claim 1, characterized in that: It also includes a cleaning component, which is arranged on the valve body, and the air blowing port of the cleaning component is located on one side of the signal triggering member.

8. The coal valve at the coal mill outlet according to claim 7, characterized in that: The cleaning assembly includes a solenoid valve, an air supply pipe and an air blowing nozzle, one end of the air supply pipe is connected to an air source, the solenoid valve is arranged on the air supply pipe, the air blowing nozzle is connected to the air supply pipe, the air blowing nozzle is arranged on the valve body and the outlet of the air blowing nozzle is arranged opposite to the magnetic switch.

9. The coal valve at the coal mill outlet according to claim 8, characterized in that: The cleaning component also includes a filter, which is arranged on the air supply pipeline and located upstream of the solenoid valve.

10. A coal mill, characterized in that: A coal mill outlet coal valve comprising the coal mill outlet coal valve according to any one of claims 1 to 9.

Images