A wrench with short-distance bidirectional rotation capability

Abstract

The invention discloses a wrench with short-distance bidirectional rotation capability, comprising a handle (1) with adjustable length, an upper turntable (2) provided at the front end of the handle (1), a lower turntable (3) provided below the upper turntable (2), the upper turntable (2) connected to the lower turntable (3) via a bearing (4), a plurality of clamping joints (5) provided on the bottom surface of the lower turntable (3), a detachable coupling mechanism provided between the upper turntable (2) and the lower turntable (3); the coupling mechanism comprises an inner gear ring (6) located outside the upper turntable (2), the inner gear ring (6) being fixed to the lower turntable (3), liftable support rods (7) provided on both sides of the upper turntable (2), a compression spring (8) connected to the upper turntable (2) provided on one side of the support rod (7), and the support rod (7) being rotatably connected to the upper turntable (2). The invention has the advantages of being able to make valves easy to open and close, requiring little operating space, and being easy to use.

Description

Technical Field

[0001] The invention belongs to the field of valve opening and closing equipment for pumped storage power station units, and in particular relates to a wrench with short-distance bidirectional rotation capability for opening and closing valves for pumped storage power station units. Background Art

[0002] There are many valves in the pumped storage power station, and most of the valves are opened and closed manually. There is a hand wheel on the valve, and the worker opens and closes the valve by rotating the hand wheel. After long-term use, it is often very difficult to open and close the valve manually due to valve corrosion or foreign matter. Therefore, there is an urgent need for a device that can make valve opening and closing easier. Summary of the invention

[0003] The object of the present invention is to provide a wrench with short-distance bidirectional rotation capability. The present invention has the advantages of making valves easy to open and close, requiring little operating space, and being easy to use.

[0004] The technical solution of the present invention is: a wrench with short-distance bidirectional rotation capability, including a handle with adjustable length, an upper turntable is provided at the front end of the handle, a lower turntable is provided below the upper turntable, the upper turntable is connected to the lower turntable through a bearing, a plurality of card joints are provided on the bottom surface of the lower turntable, and a detachable coupling mechanism is provided between the upper turntable and the lower turntable.

[0005] In the aforementioned wrench with short-distance bidirectional rotation capability, the combining mechanism includes an inner gear ring located on the outer side of the upper turntable, the inner gear ring is fixed to the lower turntable, and both sides of the upper turntable are provided with liftable support rods, one side of the support rod is provided with a compression spring connected to the upper turntable, and the support rod is rotatably connected to the upper turntable.

[0006] In the aforementioned wrench with short-distance bidirectional rotation capability, the upper turntable is connected to the handle through a pipe sleeve, a rotating shaft is provided in the pipe sleeve, the lower end of the rotating shaft is fixed to the lower turntable, a bearing connected to the lower turntable is provided on the outer side of the lower end of the rotating shaft, a gasket is provided at the upper end of the rotating shaft, the gasket is fixed to the rotating shaft by screws, and the gasket is located at the top of the pipe sleeve.

[0007] In the aforementioned wrench with short-distance bidirectional rotation capability, a sealing cover is provided on the outside of the pipe sleeve, an annular guide groove is provided at the bottom of the sealing cover, and an annular guide rail fixed by an internal gear ring is provided in the guide groove.

[0008] In the aforementioned wrench with short-distance bidirectional rotation capability, the outer side of the sealing cover is provided with a downwardly extending annular sealing edge, the guide groove is located at the bottom of the annular sealing edge, a gap is left between the sealing cover and the inner gear ring, the top surface of the upper turntable is lower than the top surface of the inner gear ring, a rotating shaft is provided on the support rod, the lower end of the rotating shaft is inserted into the upper turntable, the upper end of the rotating shaft passes through the sealing cover, the upper end of the rotating shaft is provided with a pointer-shaped knob, and one side of the knob is provided with a push rod connected to the sealing cover.

[0009] In the aforementioned wrench with short-distance bidirectional rotation capability, the support rod is arc-shaped, both sides of the front end of the teeth of the internal gear ring are provided with bevels, and the end of the support rod is provided with a top connection surface matching the bevel.

[0010] In the aforementioned wrench with short-distance bidirectional rotation capability, the height of the gap is greater than the thickness of the support rod, and one end of the push rod is rotatably connected to the sealing cover.

[0011] Compared with the prior art, the present invention utilizes a plurality of card joints to connect the handwheel on the valve of the unit, and drives the handwheel to rotate through the handle to realize the opening and closing of the valve of the unit. When opening and closing the valve of the unit, the handle increases the arm length, making the valve opening and closing easier, and the handle length is adjustable, which is more flexible to use. In places where the operating space is sufficient, the handle length is increased to make the handle rotation more labor-saving. In places where the operating space is narrow, the handle length is shortened so that the handle can be smoothly rotated, reducing the demand for the operating space. The present invention can realize the one-way drive handwheel rotation in both clockwise directions. The worker only needs to operate the handle slightly to display the opening and closing of the valve, and the demand for the operating space is small. In addition, the present invention also makes it convenient to switch the reversing drive of the handwheel through structural improvements, and can realize rapid switching under the two working conditions of opening the valve and closing the valve, which is convenient to use. Therefore, the present invention has the advantages of being able to make the valve easy to open and close, requiring little operating space, and being convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a front view of the present invention.

[0013] Figure 2 yes Figure 1 Schematic diagram at AA.

[0014] Figure 3 It is a top view of the present invention.

[0015] Figure 4 yes Figure 2 Schematic diagram at DD.

[0016] Figure 5 It is a top view of the present invention in the first usage mode.

[0017] Figure 6 yes Figure 5 Cross-sectional view at B.

[0018] Figure 7 It is a top view of the present invention in the second usage mode.

[0019] Figure 8 yes Figure 7 Cross-sectional view at C.

[0020] Fig. 9 It is a top view of the present invention in the third usage mode.

[0021] Fig.10 yes Figure 8 Schematic diagram of the internal structure.

[0022] Fig.11 It is a schematic diagram of the hand wheel on the unit valve.

[0023] The markings in the accompanying drawings are: 1-handle, 2-upper turntable, 3-lower turntable, 4-bearing, 5-card joint, 6-inner gear ring, 7-support rod, 8-compression spring, 9-pipe sleeve, 10-rotating shaft, 11-gasket, 12-screw, 13-sealing cover, 14-guide groove, 15-annular guide rail, 16-annular edge sealing, 17-gap, 18-rotating shaft, 19-knob, 20-top rod, 21-bevel, 22-top connection surface, 23-inner rod, 24-outer tube. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0025] Embodiment. A wrench with short-distance bidirectional rotation capability, such as Figures 1 to 4 As shown, it includes a handle 1 with adjustable length, an upper turntable 2 is provided at the front end of the handle 1, a lower turntable 3 is provided below the upper turntable 2, the upper turntable 2 is connected to the lower turntable 3 through a bearing 4, three circumferentially distributed clamping joints 5 are provided on the bottom surface of the lower turntable 3, and a detachable coupling mechanism is provided between the upper turntable 2 and the lower turntable 3.

[0026] The combining mechanism comprises an inner gear ring 6 located outside the upper turntable 2, the inner gear ring 6 is fixed to the lower turntable 3, both sides of the upper turntable 2 are provided with liftable support rods 7, one side of the support rod 7 is provided with a compression spring 8 connected to the upper turntable 2, and the support rod 7 is rotatably connected to the upper turntable 2.

[0027] The upper turntable 2 is connected to the handle 1 through a pipe sleeve 9, a rotating shaft 10 is arranged in the pipe sleeve 9, the lower end of the rotating shaft 10 is fixed to the lower turntable 3, a bearing 4 connected to the lower turntable 3 is arranged outside the lower end of the rotating shaft 10, a gasket 11 is arranged at the upper end of the rotating shaft 10, the gasket 11 is fixed to the rotating shaft 10 through a screw 12, and the gasket 11 is located at the top of the pipe sleeve 9. The gasket 11 is used to limit the pipe sleeve 9, but does not press the pipe sleeve 9.

[0028] A sealing cover 13 is disposed on the outer side of the pipe sleeve 9 , an annular guide groove 14 is disposed at the bottom of the sealing cover 13 , and an annular guide rail 15 to which the inner gear ring 6 is fixed is disposed in the guide groove 14 .

[0029] The outer side of the sealing cover 13 is provided with an annular sealing edge 16 extending downward, the guide groove 14 is located at the bottom of the annular sealing edge 16, a gap 17 is left between the sealing cover 13 and the inner gear ring 6, the top surface of the upper turntable 2 is lower than the top surface of the inner gear ring 6, a rotating shaft 18 is provided on the support rod 7, the lower end of the rotating shaft 18 is inserted into the upper turntable 2, the upper end of the rotating shaft 18 passes through the sealing cover 13, the upper end of the rotating shaft 18 is provided with a pointer-shaped knob 19, and one side of the knob 19 is provided with a push rod 20 connected to the sealing cover 13.

[0030] The support rod 7 is arc-shaped, and bevel angles 21 are provided on both sides of the front end of the teeth of the inner gear ring 6. The end of the support rod 7 is provided with a top connection surface 22 that matches the bevel angle 21. When the support rod 7 is against the inner gear ring 6, the bevel angle 21 and the top connection surface 22 achieve surface contact.

[0031] The height of the gap 17 is greater than the thickness of the support rod 7, and one end of the push rod 20 is rotatably connected to the sealing cover.

[0032] The handle 1 is composed of an inner rod 23 fixed on the pipe sleeve 9 and an outer tube 24 sleeved on the inner rod 23. The outer tube 24 slides on the inner rod 23 to change the length of the handle 1. When the operating space is insufficient, the length of the handle 1 is shortened so that the handle 1 can be rotated smoothly. When the operating space is sufficient, the length of the handle 1 is increased to save effort when rotating the handle 1.

[0033] The sealing cover 13 is used to prevent dust and other impurities from entering, to avoid malfunction of the wrench caused by the unsmooth rebound of the support rod 7, and to improve safety during use.

[0034] The use of the present invention: The first mode is to rotate the hand wheel on the unit valve clockwise to close the unit valve, put the lower turntable 3 on the hand wheel of the unit valve, and insert the clamping joint 5 into the hand wheel accordingly. Figure 5 and Figure 6As shown, lift the left knob 19, the left rotating shaft 18 rises, driving the left support rod 7 to rise, rotate a certain angle and then put it down, so that the end of the left support rod 7 rotates toward the outer circle and inserts into the inner gear ring 6, rotate the left push rod 20, so that the left push rod 20 rotates outward and never contacts the support rod 7, at this time, the left support rod 7 is in a locked state. Lift the right knob 19, the right rotating shaft 18 rises, driving the right support rod 7 to rise, rotate a certain angle and then put it down, so that the end of the right support rod 7 rotates toward the inner circle and never contacts the inner gear ring 6, rotate the right push rod 20, so that the right push rod 20 supports the right knob 19, to prevent the right support rod 7 from rotating again under the elastic force of the compression spring 8 and contacting the inner gear ring 6, at this time, the right support rod 7 is in a disengaged state and does not play a role. When the handle 1 rotates clockwise, the left support rod 7 is stuck, and the handle 1 drives the inner gear ring 6 to rotate through the pipe sleeve 9, the upper turntable 2, and the left support rod 7 in turn. The inner gear ring 6 drives the clamping joint 5 to rotate through the lower turntable 3. The clamping joint starts the handwheel to rotate clockwise, and the valve is closed. When the handle 1 rotates counterclockwise, the left support rod 7 is not constrained by the teeth on the inner gear ring 6, the lower turntable 3 will not rotate, and the handwheel will not rotate counterclockwise. During the counterclockwise rotation of the handle 1, the left compression spring 8 is compressed and restored by the left support rod 7. By pulling the handle 1 back and forth slightly, the handwheel can be rotated clockwise all the time to avoid interference between the handle 1 and other equipment in the power station.

[0035] The second method is to rotate the hand wheel on the unit valve counterclockwise to open the unit valve. Figure 7 and Figure 8 As shown, first put the left support rod 7 in the disengaged state, and then put the right push rod 20 in the engaged state. When the handle 1 rotates clockwise, the lower turntable 3 does not move; when the handle 1 rotates counterclockwise, the lower turntable 3 rotates counterclockwise. By turning the handle 1 back and forth slightly, the hand wheel can be rotated counterclockwise all the time to avoid interference between the handle 1 and other equipment in the power station.

[0036] The third method is when the operating space near the unit valve is large, such as Fig. 9 As shown in Fig. 10, the two support rods 7 are in the engaged state. The handle 1 is continuously rotated clockwise or counterclockwise to make the hand wheel rotate in the corresponding direction, without swinging the handle 1 back and forth, and the operation speed is faster.

[0037] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

Claims

1. A wrench with short-distance bidirectional rotation capability, characterized in that: The invention comprises a handle (1) with adjustable length, an upper turntable (2) is provided at the front end of the handle (1), a lower turntable (3) is provided below the upper turntable (2), the upper turntable (2) is connected to the lower turntable (3) via a bearing (4), a plurality of clamping joints (5) are provided on the bottom surface of the lower turntable (3), and a detachable coupling mechanism is provided between the upper turntable (2) and the lower turntable (3); The combination mechanism comprises an inner gear ring (6) located outside the upper turntable (2), the inner gear ring (6) is fixed to the lower turntable (3), both sides of the upper turntable (2) are provided with liftable support rods (7), one side of the support rod (7) is provided with a compression spring (8) connected to the upper turntable (2), and the support rod (7) is rotatably connected to the upper turntable (2); The upper turntable (2) is connected to the handle (1) via a pipe sleeve (9), a rotating shaft (10) is arranged inside the pipe sleeve (9), the lower end of the rotating shaft (10) is fixed to the lower turntable (3), a bearing (4) connected to the lower turntable (3) is arranged outside the lower end of the rotating shaft (10), a gasket (11) is arranged at the upper end of the rotating shaft (10), the gasket (11) is fixed to the rotating shaft (10) via a screw (12), and the gasket (11) is located at the top of the pipe sleeve (9); The outer side of the pipe sleeve (9) is provided with a sealing cover (13), the bottom of the sealing cover (13) is provided with an annular guide groove (14), and the guide groove (14) is provided with an annular guide rail (15) fixed with an internal gear ring (6); The outer side of the sealing cover (13) is provided with an annular sealing edge (16) extending downward, the guide groove (14) is located at the bottom of the annular sealing edge (16), a gap (17) is left between the sealing cover (13) and the inner gear ring (6), the top surface of the upper turntable (2) is lower than the top surface of the inner gear ring (6), a rotating shaft (18) is provided on the support rod (7), the lower end of the rotating shaft (18) is inserted into the upper turntable (2), the upper end of the rotating shaft (18) passes through the sealing cover (13), the upper end of the rotating shaft (18) is provided with a pointer-shaped knob (19), and one side of the knob (19) is provided with a push rod (20) connected to the sealing cover (13).

2. The wrench with short-distance bidirectional rotation capability according to claim 1, characterized in that: The support rod (7) is arc-shaped, and both sides of the front end of the teeth of the inner gear ring (6) are provided with bevel angles (21), and the end of the support rod (7) is provided with a top connection surface (22) matching the bevel angle (21).

3. The wrench with short-distance bidirectional rotation capability according to claim 1, characterized in that: The height of the gap (17) is greater than the thickness of the support rod (7), and one end of the top rod (20) is rotatably connected to the sealing cover (13).

Images