Reversing valve handle positioning mechanism

Abstract

The utility model discloses a reversing valve handle positioning mechanism, and relates to the technical field of reversing valves. The reversing valve positioning mechanism comprises a locking plate fixing plate, a locking plate and a locking device, and the locking plate fixing plate is used for being fixed to a valve body of a reversing valve; a limiting hole is formed in the locking plate, the locking plate can move between a first state and a second state relative to the locking plate fixing plate, in the first state, the limiting hole is in contact with the handle and limits movement of the handle, and in the second state, the limiting hole is not in contact with the handle so that the handle can move; the locking device can lock the locking plate in the first state. The reversing valve positioning mechanism is simple in structure, convenient to machine and capable of effectively preventing people from touching by mistake and improving safety and stability of equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of reversing valves, in particular to a reversing valve handle positioning mechanism. Background Art

[0002] Hydraulic equipment used in large facilities such as hydropower stations and nuclear power plants is equipped with hydraulic valves, whose handles are used to switch between manual control and electromechanical control, or when manual operation is required to ensure the operation of the equipment. Hydraulic valves all have positioning mechanisms that can position themselves when they are pulled to the required position. However, considering factors such as equipment vibration and accidental touch by personnel, the hydraulic valve positioning mechanism cannot be completely locked after self-positioning. The handle position is prone to change during operation, causing the equipment to not work properly. In serious cases, it may cause equipment failure and even endanger the life of the equipment operator. For example, in the Chinese patent application (CN112253564A), the handle can only be kept in the current operating position by the structure of the handle itself. However, in similar usage scenarios, the equipment must perform actions accurately and safely. Currently, relying solely on the self-positioning function of the hydraulic valve is not reliable. Utility Model Content

[0003] The utility model provides a reversing valve handle positioning mechanism to solve the problems existing in the above-mentioned prior art. It has a simple structure and is easy to manufacture, can effectively prevent accidental touch by personnel, and improves the safety and stability of the equipment.

[0004] To achieve the above purpose, the present invention provides the following solutions:

[0005] The utility model provides a positioning mechanism for a reversing valve handle, comprising: a locking plate fixing plate, a locking plate and a locking device, wherein the locking plate fixing plate is used to be fixed to the valve body of the reversing valve; a limiting hole is provided on the locking plate, and the locking plate can move between a first state and a second state relative to the locking plate fixing plate, in the first state, the limiting hole contacts the handle and limits the movement of the handle, and in the second state, the limiting hole is disengaged from the handle to enable the handle to move; the locking device can lock the locking plate in the first state.

[0006] Preferably, a plurality of the limiting holes are provided, the number of the limiting holes is the same as the number of gears of the reversing valve handle, and the position of each limiting hole corresponds to the gear position of each reversing valve handle.

[0007] Preferably, the locking plate and the locking plate fixing plate form a rotational connection around a rotation axis, the locking plate can rotate around the rotation axis relative to the locking plate fixing plate to a first state and a second state, and the rotation axis is perpendicular to the locking plate fixing plate.

[0008] Preferably, it further includes a rotation shaft, through which the locking plate and the locking plate fixing plate form a rotational connection around a rotation axis, and the axis of the rotation shaft is collinear with the rotation axis.

[0009] Preferably, the rotating shaft is a bolt, a first through hole is provided on the locking plate fixing plate, a second through hole is provided on the locking plate, and the bolt passes through the first through hole and the second through hole and is threadedly connected to a nut.

[0010] Preferably, it also includes:

[0011] An adjustable fastener is provided on the locking plate fixing plate, and the adjustable fastener can lock the locking plate in the second state.

[0012] Preferably, the adjustable fastener has a connecting portion, which is fixedly connected to the locking plate fixing plate, and a sliding groove is provided on the locking plate. During the process of the locking plate rotating from the first state to the second state around the rotation axis relative to the locking plate fixing plate, the adjustable fastener can move from one end of the sliding groove to the other end, and the adjustable fastener can lock the locking plate in the first state, the second state, and any position between the first state and the second state.

[0013] Preferably, the adjustable fastener is a butterfly screw, and the butterfly screw is threadedly connected to the locking plate fixing plate;

[0014] Tighten the butterfly screw, so that the head of the butterfly screw can press the locking plate against the locking plate fixing plate to limit the relative movement between the locking plate and the locking plate fixing plate;

[0015] By loosening the butterfly screw, the head of the butterfly screw can leave the locking plate, and the locking plate and the locking plate fixing plate can move relative to each other.

[0016] Preferably, the locking device has a connecting end and a locking end;

[0017] The locking piece is provided with a third through hole, and the locking piece fixing plate is provided with a fourth through hole. The third through hole and the fourth through hole are consistent in shape and have the same cross-sectional shape and size as the locking end. In the first state, the third through hole and the fourth through hole coincide with each other, and the locking end passes through the third through hole and the fourth through hole to lock the relative position of the locking piece and the locking piece fixing plate.

[0018] The connecting end is connected to the locking plate, the locking plate fixing plate or the valve body of the reversing valve through a flexible connecting piece.

[0019] Preferably, the locking device is a locking pin.

[0020] Compared with the prior art, the utility model has achieved the following technical effects:

[0021] The utility model provides a reversing valve handle positioning mechanism, wherein a locking plate has a limiting hole capable of limiting the movement of the handle. The locking plate can move relative to a locking plate fixing plate, so that the relative position of the locking plate and the locking plate fixing plate can change between a first state and a second state. When the locking plate is in the first state relative to the locking plate fixing plate, the limiting hole contacts the handle, preventing the handle from moving, thereby limiting the gear change of the handle. When the locking plate is in the second state relative to the locking plate fixing plate, the limiting hole disengages from the handle, allowing the handle to move. At this time, the handle can be moved to adjust the gear. The utility model improves the safety of the handle gear limit by adding a locking device to lock the first state. Locking by the locking device greatly prevents the handle from being accidentally touched, resulting in a gear change.

[0022] Furthermore, a plurality of limiting holes are provided, and the number and positions of the limiting holes correspond to the handle gear positions, so that the limiting holes on the locking plate can effectively limit the various gear positions of the handle.

[0023] Furthermore, the locking plate is rotatably connected to the locking plate fixing plate. An operator can rotate the locking plate to a second position, i.e., a position where the handle is not restricted, by simply rotating the locking plate. This provides simple operation, a simple connection structure, and ease of processing. Furthermore, the locking plate can be disengaged from the handle to a position that does not hinder handle rotation with a smaller rotation angle than when rotating about an axis parallel to the locking plate fixing plate. This reduces the space occupied by the locking plate.

[0024] Furthermore, the rotation shaft is arranged on the locking plate fixing plate and is collinear with the rotation axis, which has a simple structure and is easy to process.

[0025] Furthermore, the rotating shaft is set as a bolt and fixed by a nut, which has a simple structure and is easy to process.

[0026] Furthermore, the adjustable fastener can lock the locking plate in the second state. No matter what position the reversing valve is set to, when the gear needs to be adjusted, the locking plate can be rotated to the second state, and the relative position of the locking plate and the locking plate fixing plate can be fixed by tightening the adjustable fastener. There is no need to control the locking plate with one hand and adjust the gear with one hand. The operation is simple and can be performed by one person even when both hands are required to shift gears.

[0027] Furthermore, the adjustable fastener can lock the locking plate in the first state, the second state, and any position between the first and second states, so that the locking plate can be positioned relative to the locking plate fixing plate without moving relative to the locking plate fixing plate at any position; when locking is required, the locking plate is adjusted to the first state, the adjustable fastener is tightened to fix the relative position of the locking plate and the locking plate fixing plate, and then the locking device is used to lock the locking plate, thereby preventing the device from being difficult to lock when the device shakes. In particular, under special circumstances, such as when equipment maintenance is required, the relative position of the locking plate and the locking plate fixing plate can be adjusted to any position between the first and second states and locked, thereby facilitating operation without affecting equipment maintenance; providing a sliding groove to limit the movement of the adjustable fastener can prevent the locking plate from rotating too much, thereby affecting the use of other devices other than the reversing valve.

[0028] Furthermore, a butterfly screw is used as an adjustable fastener, which has a simple structure and is easy to process. When tightening is required, the butterfly screw is tightened, and when tightening is not required, the butterfly screw is loosened, which is simple to operate.

[0029] Furthermore, the locking device has a connecting end and a locking end. The setting of the through hole enables the locking device to simply lock the locking plate and the locking plate holder in the first state to prevent accidental touch from causing the handle gear to change. The connecting end is flexibly connected to the locking plate, the locking plate fixing plate or the reversing valve body to prevent the locking device from falling or being lost after being unlocked.

[0030] Furthermore, the locking pin is used as a locking device, and the locking plate and the locking plate fixing plate can be locked by inserting the locking pin into the through hole, which is simple to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 This is a front view of the reversing valve handle positioning mechanism in some embodiments of the present utility model;

[0033] Figure 2 for Figure 1 A top view of the handle positioning mechanism of the middle reversing valve;

[0034] Figure 3 It is a schematic diagram of the three-dimensional structure of the reversing valve handle positioning mechanism in some embodiments of the present utility model.

[0035] In the figure: 1-locking plate; 2-locking plate fixing plate; 3-limiting hole; 4-rotation axis; 5-adjustable fastener; 6-locking device; 7-sliding groove. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] The purpose of the utility model is to provide a reversing valve handle positioning mechanism to solve the problems existing in the prior art, effectively prevent accidental touch by personnel, and improve the safety and stability of the equipment.

[0038] In order to make the above-mentioned purpose, features and advantages of the present invention more obvious and easy to understand, the following is a brief description of the present invention in conjunction with the attached Figures 1 to 3 The present invention is further described in detail with reference to the accompanying drawings and specific implementation methods.

[0039] The utility model provides a reversing valve handle positioning mechanism, comprising a locking piece fixing plate 2, a locking piece 1 and a locking device 6.

[0040] refer to Figures 1 to 3 As shown, the locking plate fixing plate 2 is used to be fixed to the valve body of the reversing valve. The locking plate 1 is provided with a limiting hole 3, and the locking plate 1 can move between a first state and a second state relative to the locking plate fixing plate 2. In the first state, the limiting hole 3 contacts the handle and limits the movement of the handle, thereby limiting the gear change of the handle. In the second state, the limiting hole 3 is disengaged from the handle to enable the handle to move. At this time, the handle can be moved to adjust the gear. The locking device 6 can lock the locking plate 1 in the first state. By adding the locking device 6, the utility model locks the first state, thereby improving the safety of the handle gear limit. Locking by the locking device 6 greatly avoids the situation where the handle is accidentally touched, resulting in a gear change.

[0041] In some embodiments provided by the present invention, a plurality of limiting holes 3 are provided. The number of limiting holes 3 is the same as the number of gears of the reversing valve handle, and the position of each limiting hole 3 corresponds to the gear position of each reversing valve handle. For example, if the reversing valve handle has two gears, then two corresponding limiting holes 3 are provided, and the position of each limiting hole 3 corresponds to the gear position of each reversing valve handle, so that the limiting holes 3 on the locking plate 1 can effectively limit the various gears of the handle.

[0042] In some embodiments of the present invention, the locking plate 1 forms a rotational connection with the locking plate fixing plate 2 about a rotation axis. The locking plate 1 can rotate relative to the locking plate fixing plate 2 between a first state and a second state about the rotation axis, with the rotation axis being perpendicular to the locking plate fixing plate 2. An operator simply rotates the locking plate 1 to the second state, which is when the handle is not restricted. This provides simple operation, a simple connection structure, and ease of manufacture. Furthermore, when the locking plate 1 rotates about an axis perpendicular to the locking plate fixing plate 2, a smaller angle of rotation is required to disengage the handle to a position that does not hinder handle rotation, compared to rotation about an axis parallel to the locking plate fixing plate 2. This reduces the space occupied by the locking plate 1 during rotation. In special circumstances, such as a short handle with a large head, the locking plate 1 may need to adapt the stop hole 3 to the size of the handle head to disengage the stop hole 3 from the handle when rotating about a horizontal axis. This results in the stop hole 3 being too large, resulting in poor locking effectiveness. The present invention addresses this issue by adopting an axis perpendicular to the locking plate fixing plate 2.

[0043] In some embodiments of the present invention, the reversing valve handle positioning mechanism further includes a rotating shaft 4, through which the locking plate 1 and the locking plate fixing plate 2 are rotatably connected about a rotation axis. The axis of the rotating shaft 4 is collinear with the rotation axis. The rotating shaft 4 is disposed on the locking plate fixing plate 2 and is collinear with the rotation axis, resulting in a simple structure and ease of fabrication.

[0044] In some embodiments of the present invention, the rotating shaft 4 is a bolt. The locking plate fixing plate 2 is provided with a first through-hole, and the locking plate 1 is provided with a second through-hole. The bolt passes through the first and second through-holes and is secured with a nut. Using a bolt as the rotating shaft 4 and securing it with a nut provides a simple structure and ease of fabrication.

[0045] In some embodiments of the present invention, the reversing valve handle positioning mechanism further includes an adjustable fastener 5, which is disposed on the locking plate fixing plate 2 and is capable of locking the locking plate 1 in the second state. Regardless of the position of the reversing valve, when the gear position needs to be adjusted, the locking plate 1 can be rotated to the second state, and the adjustable fastener 5 can be tightened to fix the relative position of the locking plate 1 and the locking plate fixing plate 2. This eliminates the need to use one hand to control the locking plate 1 and one hand to adjust the gear position, making operation simple. Even when two hands are required for shifting, a single person can still operate the device.

[0046] In some embodiments provided by the present invention, the adjustable fastener 5 has a connecting portion, which is fixedly connected to the locking plate fixing plate 2. A sliding groove 7 is provided on the locking plate 1. During the process of the locking plate 1 rotating from the first state to the second state relative to the locking plate fixing plate 2 around the rotation axis, the adjustable fastener 5 can move from one end of the sliding groove 7 to the other end, and the adjustable fastener 5 can lock the locking plate 1 in the first state, the second state, and any position between the first state and the second state, so that the locking plate 1 can not move relative to the locking plate fixing plate 2 at any position; when locking is required, the locking plate 1 is adjusted to the first state, the adjustable fastener 5 is tightened, the relative position of the locking plate 1 and the locking plate fixing plate 2 is fixed, and then the locking device 6 is used to lock it to prevent the situation where it is difficult to complete the locking when the equipment shakes. In particular, under special circumstances, such as when equipment maintenance is required, the relative position of the locking plate 1 and the locking plate fixing plate 2 can be adjusted to any position between the first and second states to facilitate operation without affecting equipment maintenance. The provision of a sliding groove 7 to limit the movement of the adjustable fastener 5 can prevent the locking plate 1 from rotating excessively, thereby affecting the use of other equipment besides the reversing valve. Preferably, the sliding groove 7 is a circular arc groove, the center of which is on the axis of the rotating shaft 4. When the locking plate 1 rotates, the adjustable fastener 5 moves relative to the locking plate 1 within the circular arc groove.

[0047] In some embodiments of the present invention, the adjustable fastener 5 is further configured as a butterfly screw threadedly connected to the locking plate fixing plate 2. When the butterfly screw is tightened, the head of the butterfly screw can press the locking plate 1 against the locking plate fixing plate 2 to limit relative movement between the locking plate 1 and the locking plate fixing plate 2. When the butterfly screw is loosened, the head of the butterfly screw can be removed from the locking plate 1, allowing relative movement between the locking plate 1 and the locking plate fixing plate 2. Using a butterfly screw as the adjustable fastener 5 is simple in structure and easy to manufacture. The butterfly screw can be tightened when tightening is required and loosened when tightening is not required, making operation simple. In other embodiments, the adjustable fastener 5 can also be a screw having a spring and a pressure plate. The screw is fixed to the locking plate fixing plate 2, and a spring is provided on the screw, with one end of the spring abutting the head of the screw and the other end abutting the pressure plate. The spring and the pressure plate are disposed between the screw head and the locking plate 1. When the pressing plate is pulled upward, the spring is compressed, allowing the locking plate 1 and the locking plate fixing plate 2 to move relative to each other. When the pressing plate is released, the spring presses the pressing plate and the locking plate 1 against the locking plate fixing plate 2 to limit the relative movement of the locking plate 1 and the locking plate fixing plate 2.

[0048] In some embodiments of the present invention, the locking device 6 comprises a connecting end and a locking end. The locking plate 1 is provided with a third through-hole, and the locking plate fixing plate 2 is provided with a fourth through-hole. The third and fourth through-holes are identical in shape and have the same cross-sectional shape and size as the locking end. In a first state, the third and fourth through-holes overlap, and the locking end passes through the third and fourth through-holes to lock the relative positions of the locking plate 1 and the locking plate fixing plate 2. The connecting end is connected to the locking plate 1, the locking plate fixing plate 2, or the valve body of the reversing valve via a flexible connector. The locking device 6 comprises a connecting end and a locking end. The through-hole arrangement allows the locking device 6 to easily lock the locking plate 1 and the locking plate fixing plate 2 in the first state, preventing accidental activation and a change in the handle position. The connecting end is flexibly connected to the locking plate 1, the locking plate fixing plate 2, or the reversing valve body to prevent the locking device 6 from falling or being lost after being unlocked. The flexible connector can be a rope, a spring, a plastic spiral coil, or other structure that can deform and connect the locking device 6 to the locking plate 1, the locking plate fixing plate 2, or the reversing valve body.

[0049] In some embodiments provided by the present invention, a locking pin is used as the locking device 6. The locking pin is inserted into the through hole to complete the locking of the locking piece 1 and the locking piece fixing plate 2, which is easy to operate.

[0050] In other embodiments of the present invention, a lock is used as the locking device 6. The locking structure is secure and completely prevents accidental activation, making the reversing valve handle positioning mechanism of the present invention more reliable. The lock can be any combination lock or key lock having a lock hook that can pass through the third through hole and the fourth through hole.

[0051] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A reversing valve handle positioning mechanism, characterized in that: include: A locking plate fixing plate is used to be fixed on the valve body of the reversing valve; a locking plate, wherein a limiting hole is provided on the locking plate and the locking plate is movable relative to the locking plate fixing plate between a first state and a second state, wherein in the first state, the limiting hole contacts the handle and limits movement of the handle, and in the second state, the limiting hole is disengaged from the handle to enable movement of the handle; and A locking device is provided, wherein the locking device is capable of locking the locking plate in a first state.

2. The reversing valve handle positioning mechanism according to claim 1, characterized in that: There are multiple limiting holes, the number of which is the same as the number of gears of the reversing valve handle, and the position of each limiting hole corresponds to the gear position of each reversing valve handle.

3. The reversing valve handle positioning mechanism according to claim 1, characterized in that: The locking plate is connected to the locking plate fixing plate in a rotational connection about a rotation axis. The locking plate can rotate relative to the locking plate fixing plate about the rotation axis to a first state and a second state. The rotation axis is perpendicular to the locking plate fixing plate.

4. The reversing valve handle positioning mechanism according to claim 3, characterized in that: It also includes a rotation shaft, through which the locking plate and the locking plate fixing plate are rotatably connected around a rotation axis, and the axis of the rotation shaft is collinear with the rotation axis.

5. The reversing valve handle positioning mechanism according to claim 4, characterized in that: The rotating shaft is a bolt, a first through hole is provided on the locking plate fixing plate, a second through hole is provided on the locking plate, and the bolt passes through the first through hole and the second through hole to be threadedly connected with a nut.

6. The reversing valve handle positioning mechanism according to claim 3, characterized in that: Also includes: An adjustable fastener is configured to lock the locking plate in the second state.

7. The reversing valve handle positioning mechanism according to claim 6, characterized in that: The adjustable fastener has a connecting portion, which is fixedly connected to the locking plate fixing plate. A sliding groove is provided on the locking plate. When the locking plate rotates from the first state to the second state around the rotation axis relative to the locking plate fixing plate, the adjustable fastener can move from one end of the sliding groove to the other end, and the adjustable fastener can lock the locking plate in the first state, the second state, and any position between the first and second states.

8. The reversing valve handle positioning mechanism according to claim 7, characterized in that: The adjustable fastener is a butterfly screw, and the butterfly screw is threadedly connected to the locking plate fixing plate; Tighten the butterfly screw, so that the head of the butterfly screw can press the locking plate against the locking plate fixing plate to limit the relative movement between the locking plate and the locking plate fixing plate; By loosening the butterfly screw, the head of the butterfly screw can leave the locking plate, and the locking plate and the locking plate fixing plate can move relative to each other.

9. The reversing valve handle positioning mechanism according to claim 7, characterized in that: The locking device has a connecting end and a locking end; The locking piece is provided with a third through hole, and the locking piece fixing plate is provided with a fourth through hole. The third through hole and the fourth through hole are consistent in shape and have the same cross-sectional shape and size as the locking end. In the first state, the third through hole and the fourth through hole coincide with each other, and the locking end passes through the third through hole and the fourth through hole to lock the relative position of the locking piece and the locking piece fixing plate. The connecting end is connected to the locking plate, the locking plate fixing plate or the valve body of the reversing valve through a flexible connecting piece.

10. The reversing valve handle positioning mechanism according to claim 1, characterized in that: The locking device is a locking pin.

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