Three-position switch interlocking structure

Abstract

The utility model belongs to the technical field of electrical switches, and discloses a three-position switch interlocking structure. The three-position switch interlocking structure comprises a control assembly, a separating knife assembly, a first interlocking mechanism, a second interlocking mechanism and a third interlocking mechanism. Wherein the first interlocking mechanism can lock the isolation knife when the three-position switch is located at a first position; the second interlocking mechanism can lock the isolation knife when the three-position switch is located at the second position. And the third interlocking mechanism can shield the operation hole of the isolation knife assembly when the three-position switch is located at the first position or the second position. According to the utility model, the first interlocking mechanism and the second interlocking mechanism can lock or release the isolation knife along with the station switching of the three-station switch, and the third interlocking mechanism can shield the operation hole of the isolation knife when the first interlocking mechanism and / or the second interlocking mechanism are / is invalid and the three-station switch is at the first station or the second station. Mistaken hot-line operation of personnel is prevented, and equipment safety and personal safety of the personnel are ensured.

Description

Technical Field

[0001] This utility model relates to the field of electrical switch technology, and in particular to a three-position switch interlocking structure. Background Technology

[0002] A three-position switch is an electrical device used to achieve connection, isolation, and grounding. It is one of the core components of a switchgear, integrating an isolating switch and a grounding switch into one unit, providing three positions: connection, isolation, and grounding. One interlocking control scheme for a three-position switch utilizes the operation of the three-position switch to interlock with two valve limit plates (partitions) at the PT (potentially pressed) cutter spindle. Its working principle is that when the three-position switch is in the isolation or closing position, the valve limit plates limit the PT cutter spindle.

[0003] However, the existing interlocking control scheme still has the potential for erroneous operation of the PT (Pressure Transmission Unit) isolator. Specifically, after the PT isolator switches from the grounded state to the closed state, the valve limit plate may not align with the PT isolator's main shaft limit groove to restrict its operation. In this situation, regardless of whether the three-position switch is switched to the isolated or closed position, the PT isolator still has room to move. Operating the PT isolator when the three-position switch is not in the grounded position constitutes erroneous live operation, posing a significant safety threat to the operator.

[0004] Therefore, a three-position opening and closing interlocking structure is urgently needed to solve the above problems and ensure the safety of equipment and the personal safety of operators. Utility Model Content

[0005] The purpose of this utility model is to provide a three-position opening and closing interlocking structure.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A three-position switch interlocking structure includes a control component and a partition knife assembly. The control component can control the working state of the partition knife of the partition knife assembly. The structure also includes a first interlocking mechanism, a second interlocking mechanism, and a third interlocking mechanism, which are respectively pulverizedly connected to the control component and the partition knife assembly. The first interlocking mechanism can lock the partition knife when the three-position switch is in the first position; the second interlocking mechanism can lock the partition knife when the three-position switch is in the second position; and the third interlocking mechanism can block the operating hole of the partition knife assembly when the three-position switch is in either the first or second position.

[0008] Preferably, the control assembly includes a housing and a switch valve and an operating spindle disposed on the housing, wherein the first interlocking mechanism is connected to the switch valve, and the second interlocking mechanism and the third interlocking mechanism are connected to the operating spindle.

[0009] Preferably, the partition assembly includes a housing, the partition passes through the housing and is movable along its own axial direction, and the operating hole is located on the housing and is provided corresponding to the partition.

[0010] Preferably, the first interlocking mechanism includes a first partition and a first transmission member. The first transmission member is connected to the switch valve and the first partition respectively. The first partition is slidably disposed in the housing and can release or lock the partition knife under the action of the first transmission member.

[0011] Preferably, the first interlocking mechanism further includes a first reset member disposed between the first partition and the housing, so that the first partition tends to move toward the partition blade.

[0012] Preferably, the second interlocking mechanism includes a second partition and a second transmission member. The second transmission member is connected to the operating spindle and the second partition respectively. The second partition is slidably disposed on the cutter assembly and can release or lock the cutter under the action of the second transmission member.

[0013] Preferably, the second interlocking mechanism further includes a second reset member disposed between the second partition and the housing, so that the second partition tends to move toward the partition blade.

[0014] Preferably, the third interlocking mechanism includes a baffle and a third transmission member. The third transmission member is connected to the operating spindle and the baffle respectively. The baffle is slidably disposed on the housing and located on one side of the operating hole. The baffle can block or expose the operating hole under the action of the third transmission member.

[0015] Preferably, the third interlocking mechanism further includes a third reset member disposed between the baffle and the housing, which causes the baffle to tend to move away from the operating hole.

[0016] Preferably, the operating spindle is provided with a connector, and the second interlocking mechanism and the third interlocking mechanism are connected to the operating spindle through the connector.

[0017] The beneficial effects of this utility model are:

[0018] The three-position switch interlocking structure disclosed in this utility model includes a control component and a partition assembly. The control component can control the working state of the partition assembly. It also includes a first interlocking mechanism, a second interlocking mechanism, and a third interlocking mechanism, which are respectively connected to the control component and the partition assembly. The first interlocking mechanism locks the partition when the three-position switch is in the first position; the second interlocking mechanism locks the partition when the three-position switch is in the second position; and the third interlocking mechanism blocks the operating hole of the partition assembly when the three-position switch is in either the first or second position. The first and second interlocking mechanisms of this utility model can lock or release the partition as the three-position switch switches, and the third interlocking mechanism can block the operating hole of the partition when the three-position switch is in either the first or second position if the first and / or second interlocking mechanisms fail, preventing accidental operation with live power and ensuring equipment safety and personnel safety. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the three-position opening and closing interlocking structure in one position in an embodiment of this utility model;

[0020] Figure 2 This is a utility model Figure 1 Schematic diagram of a partial cross-section at point BB;

[0021] Figure 3 This is a utility model Figure 1 A partial cross-sectional view of the partition assembly;

[0022] Figure 4 This is a utility model Figure 3 Schematic diagram of the cross section at point AA;

[0023] Figure 5 This is a schematic diagram of the structure in an embodiment of this utility model where the partition blade has not yet moved to its proper position.

[0024] Figure 6 This is a utility model Figure 5 Enlarged view of section II in the middle;

[0025] Figure 7 This is a schematic diagram of the structure of the operating spindle connecting handle in an embodiment of this utility model;

[0026] Figure 8 This is a schematic diagram of the state of a workstation in an embodiment of this utility model when the partition blade has not been moved to its proper position;

[0027] Figure 9 This is a utility model Figure 8 Schematic diagram of the cross section at point AA;

[0028] Figure 10This is a schematic diagram of the state of another workstation when the partition blade has not been moved to its proper position in an embodiment of this utility model;

[0029] Figure 11 This is a schematic diagram of the three-position opening and closing interlocking structure in another position in an embodiment of this utility model;

[0030] Figure 12 This is a utility model Figure 11 Schematic diagram of the structure at point BB;

[0031] Figure 13 This is a utility model Figure 11 A partial cross-sectional view of the partition assembly;

[0032] Figure 14 This is a utility model Figure 13 A cross-sectional view at point AA.

[0033] In the picture:

[0034] 1. Control components; 11. Opening and closing valves; 12. Operating spindle;

[0035] 2. Partition assembly; 21. Partition; 22. Housing; 221. Operating hole;

[0036] 3. First interlocking mechanism; 31. First partition plate; 32. First transmission component; 33. First reset component;

[0037] 4. Second interlocking mechanism; 41. Second partition; 42. Second transmission component; 43. Second reset component;

[0038] 5. Third interlocking mechanism; 51. Baffle; 52. Third transmission component; 53. Third reset component;

[0039] 6. Connectors. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0041] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0044] This utility model discloses a three-position opening and closing interlocking structure, such as Figure 1 , Figure 7 and Figure 11As shown, the interlocking structure includes a control component 1 and a partition assembly 2. The control component 1 can control the working state of the partition 21 of the partition assembly 2. It also includes a first interlocking mechanism 3, a second interlocking mechanism 4, and a third interlocking mechanism 5, which are respectively connected to the control component 1 and the partition assembly 2. Specifically, the first interlocking mechanism 3 can lock the partition 21 when the three-position switch is in the first position to prevent the partition 21 from operating in the first position; the second interlocking mechanism 4 can lock the partition 21 when the three-position switch is in the second position to prevent the partition 21 from operating in the second position; and the third interlocking mechanism 5 can block the operating hole 221 of the partition assembly 2 when the three-position switch is in the first or second position to prevent the operator from operating the partition 21 when the three-position switch is in the first or second position. It is understandable that the isolating switch 21 can be a PT isolating switch. A PT (Potential Transformer) isolating switch installed on the busbar side of the PT bay, and its main function is to achieve electrical isolation during PT maintenance, ensuring safe operation while the busbar is energized. However, when operating the isolating switch 21, it is necessary to ensure that the three-position switch is in the grounded position. Operating the isolating switch 21 while the three-position switch is in the isolated or closed position constitutes an incorrect energized operation. This can easily lead to equipment overload, causing component or insulation damage, or even short-circuit faults; in severe cases, it may disrupt the stability of the power system, causing power outages and resulting in serious economic losses to enterprises and society, and most seriously, endangering personnel's lives. Therefore, the first interlocking mechanism 3 of the three-position switch interlocking structure provided by this utility model can lock the isolating switch 21 when the three-position switch is in the first position, preventing the isolating switch 21 from operating in the first position. The second interlocking mechanism 4 can lock the blade 21 when the three-position switch is in the second position, preventing the blade 21 from operating in the second position. The third interlocking mechanism 5 can block the operating hole 221 of the blade assembly 2 when the three-position switch is in the first or second position, preventing the operator from operating the blade 21 when the three-position switch is in the first or second position. The first and second positions can be either the closed position or the isolated position, respectively. The remaining position of the three-position switch, the third position, is the grounded position. When the third position is in the grounded state, the operating hole 221 of the blade 21 is not blocked, and the blade 21 is not locked, ensuring that the operator can operate the blade 21 when the three-position switch is in the grounded state.

[0045] In some embodiments, such as Figure 1As shown, the control component 1 includes a housing, a switch valve 11 mounted on the housing, and an operating spindle 12. A first interlocking mechanism 3 is connected to the switch valve 11, and a second interlocking mechanism 4 and a third interlocking mechanism 5 are connected to the operating spindle 12. It can be understood that when the switch valve 11 of the three-position switch is closed, the operating spindle 12 cannot be operated. The switch valve 11 must be pulled upwards to open the handle, allowing the handle to be inserted into and connected to the operating spindle 12, thus enabling the switching of the three positions of the three-position switch.

[0046] In some embodiments, such as Figure 1 and Figure 2 As shown, the partition assembly 2 includes a housing 22, a partition 21 passing through the housing 22 and movable along its own axial direction, and an operating hole 221 located on the housing 22 and corresponding to the partition 21. It can be understood that the operator operates the partition 21 through the operating hole 221 to realize the movement of the partition 21.

[0047] In some embodiments, such as Figure 1 , Figure 3 and Figure 4As shown, the first interlocking mechanism 3 includes a first partition 31 and a first transmission member 32. The first transmission member 32 is connected to both the switch valve 11 and the first partition 31. The first partition 31 is slidably disposed on the housing 22 and can release or lock the spacer 21 under the action of the first transmission member 32. It can be understood that the first transmission member 32 is connected to the switch valve 11, and by transmitting the action of the switch valve 11 to the first partition 31, the first partition 31 locks or releases the spacer 21. In some specific embodiments, the first partition 31 is arranged along the axial direction perpendicular to the main shaft of the spacer 21 and slidably disposed within the housing 22 of the spacer assembly 2. The main shaft of the spacer 21 is provided with an annular groove, and the first partition 31 can be inserted into the annular groove, thereby limiting the spacer 21 and locking it. To simplify the structure of the first transmission member 32, the first interlocking mechanism 3 also includes a first reset member 33. The first reset member 33 is disposed between the first partition 31 and the housing 22, giving the first partition 31 a tendency to move towards the partition 21. It is understood that the first reset member 33 is an elastic element, such as a spring, disposed between the housing 22 and the first partition 31, giving the first partition 31 a tendency to move towards the partition 21. In other words, without external force, the first reset member 33 will push the first partition 31 to the locking position, that is, the position where it is inserted into the annular groove on the main shaft of the partition 21. At this time, the first transmission member 32 can be configured as a pull rope, which can smoothly transmit the action of the opening and closing valve 11 to the first partition 31. Specifically, the first partition 31 is L-shaped, with both sides of the L-shaped plate slidably connected to the guide grooves on both sides of the housing 22. One end of the L-shaped plate can be inserted into the annular groove on the main shaft of the partition 21, and a guide post is provided on the side of the other end. A guide post is also provided on the housing 22 at the corresponding position. The sum of the lengths of the two guide posts is less than the length of the spring, and the spring is sleeved on the two guide posts. Optionally, the guide post on the housing 22 is hollow, and the pull rope, which serves as the first transmission component 32, passes through the hollow guide post and is fixedly connected to the guide post on the first partition 31 to achieve control of the first partition 31. The specific form of the pull rope is existing technology and can be referred to as the bicycle brake pull rope, which will not be described in detail here. In other embodiments, transmission can also be achieved through a gear and rack, etc. The up and down movement of the switch valve 11 drives the rack to move and drive the gear shaft to rotate. At the end, a rack is also provided to mesh with the gear on the gear shaft to achieve transmission and control of the first partition 31. Based on the same principle, the specific structure can be adapted to the actual spatial layout, which will not be described in detail here.

[0048] In some embodiments, such as Figure 1 , Figure 3 and Figure 4As shown, the second interlocking mechanism 4 includes a second partition 41 and a second transmission member 42. The second transmission member 42 is connected to the operating spindle 12 and the second partition 41, respectively. The second partition 41 is slidably disposed on the cutter assembly 2 and can release or lock the cutter 21 under the action of the second transmission member 42. It can be understood that the second transmission member 42 is connected to the operating spindle 12, and by transmitting the movement of the operating spindle 12 to the second partition 41, the second partition 41 locks or releases the cutter 21. In some specific embodiments, the second partition 41 is disposed along the axial direction perpendicular to the spindle of the cutter 21 and slidably disposed within the housing 22 of the cutter assembly 2. The spindle of the cutter 21 is provided with an annular groove, and the second partition 41 can be inserted into the annular groove, thereby limiting the position of the cutter 21 and locking it. The first partition 31 and the second partition 41 can be inserted into the same annular groove or different annular grooves. For example, two annular grooves can be provided and spaced apart along the axial direction of the main shaft of the cutter 21. This arrangement prevents interference between the first partition 31 and the second partition 41. Furthermore, the positions of the first partition 31 and the second partition 41 are more flexible, not limited to being located on opposite sides of the annular groove, thus improving the spatial adaptability of the structure. To simplify the structure of the second transmission component 42, the second interlocking mechanism 4 also includes a second reset component 43. The second reset component 43 is located between the second partition 41 and the housing 22, giving the second partition 41 a tendency to move towards the cutter 21. It is understood that the second reset component 43 is an elastic element, such as a spring, located between the housing 22 and the second partition 41, giving the second partition 41 a tendency to move towards the cutter 21. In other words, without external force, the second reset component 43 will push the second partition 41 to the locking position, that is, the position within the corresponding annular groove on the main shaft of the cutter 21. At this time, the second transmission component 42 can be configured as a pull rope, which can smoothly transmit the action of the operating spindle 12 to the second partition 41. The specific form of the pull rope is existing technology, and can be referred to as the bicycle brake pull rope, which will not be described in detail here. Specifically, the second partition 41 is L-shaped, and the two sides of the L-shaped plate are slidably connected to the guide grooves on both sides of the housing 22. One end of the L-shaped plate can be inserted into the annular groove on the spindle of the partition 21, and a guide post is provided on the side of the other end. A guide post is also provided on the housing 22 at the corresponding position. The sum of the lengths of the two guide posts is less than the length of the spring. The spring is sleeved on the two guide posts. Optionally, the guide post provided on the housing 22 is hollow. The pull rope, which is the second transmission component 42, passes through the hollow guide post and is fixedly connected to the guide post on the second partition 41 to realize the control of the second partition 41. In other embodiments, the transmission can also be realized by means of gears and racks, etc. The rotation of the operating spindle 12 drives the gear to rotate, which drives the gear shaft to rotate or the rack to move. A gear and rack are also provided at the end to realize the transmission and control of the second partition 41. Of course, a combination of gears and racks and ropes can also be used.Based on the same principles, the specific structure can be adapted to the actual spatial layout, which will not be elaborated here.

[0049] In some embodiments, such as Figure 1 and Figure 2 As shown, the third interlocking mechanism 5 includes a baffle 51 and a third transmission member 52. The third transmission member 52 is connected to the operating spindle 12 and the baffle 51 respectively. The baffle 51 is slidably disposed on the housing 22 and located on one side of the operating hole 221. The baffle 51 can block or expose the operating hole 221 under the action of the third transmission member 52. In some specific embodiments, the baffle 51 is disposed on the outside of the housing 22, which saves internal space of the partition assembly 2 and is also a foolproof design, allowing the operator to clearly identify whether the current operating hole 221 is blocked, avoiding forced operation. Two bolts are provided at one end of the baffle 51. The housing 22 of the partition assembly 2 has a guide hole extending along the moving direction of the baffle 51. The two bolts pass through the guide hole and cooperate to guide the movement. Nuts are connected to the bolts inside the housing 22 to prevent the baffle 51 from detaching from the housing 22. The other end of the baffle 51 can block the operating hole 221, ensuring that the operating hole 221 is blocked when the three-position switch is in the first or second position, i.e., in the closed or isolated position. The third transmission member 52 can be connected to one bolt of the baffle 51 to realize transmission. In some specific embodiments, the third interlocking mechanism 5 also includes a third reset member 53, which is disposed between the baffle 51 and the housing 22, giving the baffle 51 a tendency to move away from the operating hole 221. It is understood that the third reset member 53 can be a spring, with both ends connected to the housing 22 and the baffle 51 of the partition assembly 2, respectively. Specifically, one end of the spring is connected to one side of the housing 22, and the other end is connected to one of the bolts on the baffle 51. The third transmission member 52 can be a pull rope, which passes through the side of the housing 22 away from the third reset member 53 and is connected to another bolt on the baffle 51, thereby cooperating with the third reset member 53 to achieve linkage control of the baffle 51. It is understood that the setting of the reset member helps to simplify the structure of the transmission member. In other embodiments, the first reset member 33, the second reset member 43, and the third reset member 53 may not be set, and the first transmission member 32, the second transmission member 42, and the third transmission member 52 can directly and completely control the first partition 31, the second partition 41, and the baffle 51, respectively.

[0050] In some embodiments, such as Figure 1 As shown, a connecting member 6 is provided on the operating spindle 12, and the second interlocking mechanism 4 and the third interlocking mechanism 5 are connected to the operating spindle 12 through the connecting member 6. It can be understood that the connecting member 6 can amplify the rotational movement of the operating spindle 12, which is beneficial to the transmission of the transmission components.

[0051] To facilitate understanding of the principle of this utility model, the operation process of the interlocking structure in some embodiments of this utility model is as follows:

[0052] When the product is in its initial state, such as Figure 1 As shown, the switch valve 11 is in the closed state, that is, in the lower position. The operating spindle 12 is currently in the first position of the three-position switch. The following example uses the first position as the closed position. Figure 3 As shown, at this time, the pull rope of the first interlocking mechanism 3 connected to the switch valve 11 is pulled out towards the switch valve 11, applying a force away from the partition 21 to the first partition 31, so that the first partition 31 is in the position of exiting the annular groove on the main shaft of the partition 21, without limiting the partition 21. The end of the pull rope of the second interlocking mechanism 4 connected to the operating main shaft 12 is close to the fixed part of the control component 1 (not shown in the figure), that is, it is not pulled out. At this time, the second partition 41 is in the annular groove on the main shaft of the partition 21 under the action of the spring of the second reset member 43, so as to limit the partition 21. See reference. Figure 13 The state of the second partition 41 locks the blade 21, preventing the blade 21 from operating when the three-position switch is in the closed position. That is, in the first position, the first interlocking mechanism 3 releases the blade 21, and the second interlocking mechanism 4 locks the blade 21.

[0053] When the three-position switch needs to be adjusted from the closed position to the isolated position, that is, to the second position, first pull the switch valve 11 upwards, insert the handle and connect the operating spindle 12, and rotate the operating spindle 12 to the isolated position using the handle. (Refer to...) Figure 7 As shown. At this time, the switch valve 11 is pulled upwards, and the pull rope of the first interlocking mechanism 3 is no longer stretched by the switch valve 11. Under the action of the first reset member 33, the first partition 31 moves towards the partition knife 21 and inserts into the annular groove on the main shaft of the partition knife 21, limiting the partition knife 21 and locking it (not shown in the figure). When the main shaft 12 is rotated to the isolation state position, the pull rope of the second interlocking mechanism 4 is stretched, and the second partition 41 at the other end of the pull rope moves away from the partition knife 21 under the action of the pull rope until it exits the annular groove on the main shaft of the partition knife 21, releasing the partition knife 21. That is to say, in the second position, the first interlocking mechanism 3 locks the partition knife 21, and the second interlocking mechanism 4 releases the partition knife 21.

[0054] When the three-position switch needs to be adjusted from the isolated position to the grounded position, that is, adjusted to the third position, the operating handle continues to rotate the operating spindle 12. The operating spindle 12 continues to pull the pull rope of the second interlocking mechanism 4. The pull rope continues to pull the second partition 41 away from the partition 21, and remains in the released state. After the operating spindle 12 is rotated to the position, the handle is removed, and the switch valve 11 is pulled down to close the switch valve 11. At this time, the pull rope of the first interlocking mechanism 3 is pulled, which drives the first partition 31 to move away from the partition 21, releasing the partition 21. The state at this time is as follows. Figures 1-4 As shown. In the grounded state position, the isolation switch 21 is operated. That is, in the third position, both the first interlocking mechanism 3 and the second interlocking mechanism 4 release the isolation switch 21, and the isolation switch 21 is no longer limited. When switching from the grounded state position to the isolation state position or continuing to switch to the closing state position, the above process is reversed.

[0055] However, in practical applications, the first interlocking mechanism 3 and the second interlocking mechanism 4, such as Figure 5 and Figure 6 As shown, if the blade 21 of the blade assembly 2 does not operate properly, when switching from the grounding state to the isolation state or further to the closing state, neither the first partition 31 nor the second partition 41 may be inserted into the annular groove on the blade 21. This would cause the blade 21 to still operate in both the closing and isolation states. Therefore, to avoid the above problem, this invention also provides a third interlocking mechanism 5. When the third interlocking mechanism 5 is in the closing state, the pull rope, which is the third transmission component 52, is pulled out to the maximum extent by the operating spindle 12, pulling the baffle 51 to block the operating hole 221 on the blade assembly 2, thus preventing the blade 21 from being operated. When the three-position switch is in the isolated position, the pull rope of the third interlocking mechanism 5 is slightly loosened and released. The baffle 51 moves a certain distance under the action of the third reset member 53. However, the width of the baffle 51 is still sufficient to block the operating hole 221. Therefore, even in the isolated position, the baffle 51 still blocks the operating hole 221, preventing the partition knife 21 from being operated. The state of the third interlocking mechanism 5 at this time can be referenced. Figure 10 Or refer to Figures 11 to 14 When the main spindle 12 switches to the grounded position, the pull rope of the third interlocking mechanism 5 continues to be released. Under the action of the third reset member 53, the baffle 51 continues to move away from the spacer 21 until the operating hole 221 is exposed, so that the operator can operate the spacer 21 through the operating hole 221, so that the spacer 21 can only be operated in the grounded position.

[0056] If the first interlocking mechanism 3 and the second interlocking mechanism 4 are in normal operation at this time, the state of the interlocking structure can be referenced. Figures 1 to 4If, at this point, the first interlocking mechanism 3 and the second interlocking mechanism 4 are in a malfunctioning state due to the partition 21 not being properly activated, the following can be referenced: Figures 7 to 10 As shown. Among them, as Figure 7 The state shown can be understood as preparing to adjust the workstation by operating the spindle 12 connecting handle before the partition 21 has been fully moved. Figure 8 and Figure 9 The state shown can be understood as the state of the interlocking structure in the grounded position after the valve switch is pulled up and before the three-position switch is adjusted. The first interlocking mechanism 3 fails to lock the partition 21, and the second interlocking mechanism 4 is not aligned with the annular groove. For example... Figure 10 The state shown can be understood as follows: when the three-position switch is adjusted from the grounded position to another position, the operating spindle 12 moves, thereby driving the second partition 41 and the baffle 51 to move. At this time, the first interlocking mechanism 3 and the second interlocking mechanism 4 are not aligned with the annular groove and fail. However, the baffle 51 of the third interlocking mechanism 5 moves to the position corresponding to the partition 21, blocking the operating hole 221. (Refer to...) Figure 12 As shown, this prevents the three-position switch from being operated in a non-grounded position in the event of failure of the first interlocking mechanism 3 and the second interlocking mechanism 4.

[0057] It is understood that the above-described station sequence is merely an assumption for illustrating the principle of this utility model. The specific station and station adjustment sequence may not be as described above. The locking or releasing states of the first interlocking mechanism 3 and the second interlocking mechanism 4 in the first or second station can also be adaptively adjusted, as long as the structure is set according to the above principle. For example, when the initial state of the three-position switch is the isolation station, the isolation station is the first station. At this time, the first interlocking mechanism 3 can also be in the working state of releasing the partition 21, and the second interlocking mechanism 4 can also be in the working state of locking the partition 21. When the closing station is the second station, the first interlocking mechanism 3 can also be in the working state of locking the partition 21, and the second interlocking mechanism 4 can also be in the working state of releasing the partition 21.

[0058] The three-position switch interlocking structure disclosed in this utility model includes a control component 1 and a partition component 2. The control component 1 can control the working state of the partition 21 of the partition component 2. It also includes a first interlocking mechanism 3, a second interlocking mechanism 4, and a third interlocking mechanism 5, which are respectively connected to the control component 1 and the partition component 2. The first interlocking mechanism 3 can lock the partition 21 when the three-position switch is in the first position; the second interlocking mechanism 4 can lock the partition 21 when the three-position switch is in the second position; and the third interlocking mechanism 5 can block the operating hole 221 of the partition component 2 when the three-position switch is in the first or second position. The first interlocking mechanism 3 and the second interlocking mechanism 4 can lock or release the partition 21 as the three-position switch switches, and the third interlocking mechanism 5 can block the operating hole 221 of the partition 21 when the first interlocking mechanism 3 and / or the second interlocking mechanism 4 fail, preventing accidental operation with live power and ensuring equipment safety and personnel safety.

[0059] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A three-position switch interlocking structure, comprising a control assembly (1) and a knife shield assembly (2), the control assembly (1) being capable of controlling the working state of a knife shield (21) of the knife shield assembly (2), characterized in that, The first interlocking mechanism (3), the second interlocking mechanism (4) and the third interlocking mechanism (5) are respectively in transmission connection with the control assembly (1) and the spacer blade assembly (2); The first interlocking mechanism (3) can lock the spacer blade (21) when the three-position switch is in the first position; the second interlocking mechanism (4) can lock the spacer blade (21) when the three-position switch is in the second position; and the third interlocking mechanism (5) can shield the operation hole (221) of the spacer blade assembly (2) when the three-position switch is in the first position or the second position.

2. The three-position switch interlock structure according to claim 1, characterized by The control assembly (1) comprises a shell, a switch valve (11) and an operation main shaft (12) arranged on the shell, the first interlocking mechanism (3) is connected with the switch valve (11), and the second interlocking mechanism (4) and the third interlocking mechanism (5) are connected with the operation main shaft (12).

3. The three-position switch interlock structure according to claim 2, characterized by The spacer blade assembly (2) comprises a shell (22), the spacer blade (21) is arranged in the shell (22) and can move along the axial direction of the spacer blade (21), and the operation hole (221) is arranged on the shell (22) and corresponds to the spacer blade (21).

4. The three-position switch interlock structure according to claim 3, characterized by The first interlocking mechanism (3) comprises a first partition plate (31) and a first transmission member (32), the first transmission member (32) is connected with the switch valve (11) and the first partition plate (31) respectively, the first partition plate (31) is slidingly arranged in the shell (22) and can release or lock the spacer blade (21) under the action of the first transmission member (32).

5. The three-position switch interlock structure according to claim 4, characterized by The first interlocking mechanism (3) further comprises a first reset member (33), the first reset member (33) is arranged between the first partition plate (31) and the shell (22), so that the first partition plate (31) has a tendency to move towards the spacer blade (21).

6. The three-position switch interlock structure according to claim 3, wherein The second interlocking mechanism (4) comprises a second partition plate (41) and a second transmission member (42), the second transmission member (42) is connected with the operation main shaft (12) and the second partition plate (41) respectively, the second partition plate (41) is slidingly arranged on the spacer blade assembly (2) and can release or lock the spacer blade (21) under the action of the second transmission member (42).

7. The three-position switch interlock structure according to claim 6, characterized by The second interlocking mechanism (4) further comprises a second reset member (43), the second reset member (43) is arranged between the second partition plate (41) and the shell (22), so that the second partition plate (41) has a tendency to move towards the spacer blade (21).

8. The three-position switch interlock structure according to claim 3, wherein The third interlocking mechanism (5) comprises a baffle (51) and a third transmission member (52), the third transmission member (52) is connected with the operation main shaft (12) and the baffle (51) respectively, the baffle (51) is slidingly arranged on the shell (22) and located on one side of the operation hole (221), and the baffle (51) can shield or expose the operation hole (221) under the action of the third transmission member (52).

9. The three-position switch interlock structure according to claim 8, characterized by The third interlocking mechanism (5) further comprises a third reset member (53) arranged between the baffle (51) and the shell (22), so that the baffle (51) has a tendency to move away from the operation hole (221).

10. The three-position switch interlock structure according to any one of claims 2-9, characterized in that, The operating spindle (12) is provided with a connecting member (6), and the second interlocking mechanism (4) and the third interlocking mechanism (5) are connected with the operating spindle (12) through the connecting member (6).

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