JPH1061789A - Ball valve used in air conditioner or the like and lock mechanism thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mechanism which prevents turning of a stem open/close operating a ball valve. SOLUTION: In a main unit 1, a ball valve element 2 having a communication hole A33 is arranged, and, from one end side of the main unit 1, by a tightening disk 5, packings 3a, 3b in both sides of the ball valve element 2 are tightened. By operating a stem 7 engaging one end with a notched groove 4 of the ball valve element 2, in a ball valve opening/closing a passage by turning the ball valve element 2 to change a direction of the communication hole A33, in the other end of the stem 7, a service joint 16 built in with a valve core 20 is integrally constituted, in the ball valve unit 2 or the packing 3a, 3b, a communication path communicating with a flare nut 15 side communication hole C35 from the valve core part 20 is provided, in the periphery of the stem 7, a pair of parallel parts formed in a groove or plane engaging a pair of parallel linear parts provided inward a handle 19 are provided, and relating to an axial direction of the stem 7, the handle 19 moved in a right angle direction is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ball valve used for an air conditioner or other equipment, and a lock mechanism used for the ball valve. The present invention relates to a lock mechanism that integrally forms a service joint having a built-in lock and prevents rotation of the stem by moving a handle provided on the stem.

[Prior Art] FIGS. 18, 19 and 20
A conventional ball valve of this type will be described below. As shown in FIG. 18, in a conventional ball valve, a ball valve body 2 having a communication hole A33 in the center is disposed inside a main body 1, and packings 3a and 3b are disposed on both sides of the ball valve body 2. In this state, the contact surfaces of the main body 1, the packing 3a, the packing 3b, and the tightening disk 5 are sealed in a confidential state by screwing and tightening the tightening disk 5. At this time, the contact portion between the end of the main body 1 and the clamping disk 5 is hermetically sealed by pressure contact. The lower end of the stem 7 engages with the notch groove 4 provided in the ball valve body 2, and rotates the stem 7 to rotate the ball valve body 2 to open and close the passage. An O-ring 8 is attached to the stem 7 to maintain airtightness. A pin 9 is provided on the upper portion of the stem 7, a driver groove 10 is further provided, and a projection 1 is provided on the upper portion of the main body 1.
1 is provided.

When the stem 7 is rotated counterclockwise, the pin 9 comes into contact with the projection 11 to open the valve. When the stem 7 is rotated 90 degrees clockwise from the above state, as shown in FIG. 9 comes into contact with the projection 11 to close the valve. Thus, by turning the stem 7 90 degrees clockwise and counterclockwise, the ball valve body 2 rotates to open and close the passage. Reference numeral 12 denotes a metal packing, and reference numeral 13 denotes a stem cap, which are provided to further ensure leakage of fluid to the outside. The connection pipe 6 is a connection port for brazing and connecting the pipe pipe, the union joint 24 and the flare nut 15 are connection parts for flaring the pipe pipe similarly, and the blind cap 14 is used for connection before the pipe connection. This is a dust-proof and hermetic cap for storage during storage. Further, in the conventional example illustrated in this embodiment, a service joint 16 is provided at a communicating position in the middle of the passage from the ball valve body 2 to the union joint 24. As shown in FIG. 21, the service joint 16 includes a core stem 22, a valve core 20, a core cap 21, and the like. The service joint 16 is used to connect a vacuum pump or fill a refrigerant in order to discharge air in the piping. And the valve core 20 used is J
ISD4211-B type or the like is used.

[Problems to be Solved by the Invention] Conventional problems are as follows. When a conventional ball valve is used in an air conditioner, it operates in an open state as shown in FIG. 18 during operation, but during operation of equipment, vibration due to operation of a compressor, a motor, etc., and vibration due to pulsation of a refrigerant, etc. Is transmitted to the entire apparatus, and the ball valve attached to the pipe is always vibrating during operation. Due to this vibration, the ball valve body 2 positioned in the open state as shown in FIG. 18 gradually moves in the valve closing direction, and is operated in a half-open state, or in a severe case, is operated in a fully closed state. Occurs. In addition, the conventional one
As illustrated in FIG. 21, the core stem 22 of the service joint 16 is manufactured separately from the main body 1 and fixed to the main body 1 by screwing or by welding to the main body 1. The disadvantage is that leakage from the screw part is easy to occur,
The welding type requires cleaning for removing oxide scale at the time of welding, and both have the drawback that the number of processing steps for manufacturing each part increases and the cost increases.

Although it is originally desired to integrally mold the main body 1 and the core stem 22, this method has another obstacle. As shown in FIG. 21, the content of the obstacle is that the diameter of the passage 23 of the core stem 22 surrounding the innermost part of the valve core 20 needs to be one step larger than that of the other parts in order to secure a passage area (the passage 23). The dimensions of are defined by the valve opening dimensions of the standard valve stem in the appendix of JIS.D.4211), and when the main body 1 and the core stem 22 are integrally formed, the through hole 23 at the back of the core stem 22 is processed. At present, it is unavoidable that the core stem 22 is provided separately because there is an obstacle such as extremely difficult to perform. Therefore, in the conventional example, as shown in FIG. 20, a service joint 16 is provided at a portion located between the stem cap 13 and the flare nut 15. This means that the length of the main body 1 is increased, so that the material cost increases and the cost increases.
Is manufactured by hot forging using brass material.If the length is extremely long compared to the vertical and horizontal dimensions of parts with severe irregularities, the material flow will be uneven when molding, resulting in material defects. There is.

[0006] The service coupling 16 is shown in FIGS.
9, it is provided at a position inclined by a certain angle with respect to the axis of the stem 7 as exemplified in FIG. In operation, this is preferably in the direction parallel to the stem 7, but if it is in the parallel direction, both the stem cap 13 and the core cap 21 need to be removed and tightened using a spanner. Since it is necessary to keep a sufficient distance between them, the length of the main body 1 is further increased. However,
If the service joint 16 is inclined by a certain angle with respect to the axis of the stem 7, the following problems occur. As shown in FIGS. 22 and 23, the outdoor unit of the air conditioner includes a compressor 26, an outdoor unit fan 27, an outdoor unit heat exchanger 2 inside a housing 25.
8 and the like are connected by an outdoor unit pipe 29, and a ball valve 30 is attached to an outer wall of the housing 25. In this case, the service joint 16 of the ball valve 30 faces obliquely downward. Normally, a charge hose 31 is connected to the service fitting 16.
When 6 is in the downward direction, the charge hose 31 is
You will run into 2 Thus, the service fitting 16
In the oblique direction has a problem that the installation position and directionality of the ball valve must be limited.

[Means for Solving the Problems]
In the main body, a ball valve having a communication hole A in the center is arranged,
In a state where packing is arranged on both sides of the ball valve body, the ball valve body,
By opening the passage by turning the ball valve body and changing the direction of the communication hole A by operating the stem whose one end is engaged with the notch groove provided in the ball valve body while tightening the packing. In the configured ball valve, a service joint incorporating a valve core is integrally formed at the other end of the stem, and a communication path A or communication path B for communicating the ball valve body or the packing from the valve core portion to the flare nut side communication hole C. A ball valve for use in an air conditioner or the like, wherein a pair of parallel straight portions provided inside a handle is engaged with the outer periphery of the stem, a groove or a flat portion. Having a pair of parallel portions, a handle that moves in a direction perpendicular to the axial direction of the stem is provided in the parallel portion, and the handle has a pair of rising portions on both sides of the flat portion, The opposite edge is formed in a pair of parallel straight portions, and is configured in a substantially U-shape so as to be inserted from a direction perpendicular to the axial direction of the stem, or the inner opposite edge is a pair of parallel straight lines. A locking mechanism for a ball valve, wherein the locking mechanism is formed in a deformed annular shape so as to be inserted from above the stem.

[Operation] A first feature of the present invention is that the stem 7 of the ball valve and the service joint 16 are integrally formed, and the function of the stem 7 for turning the ball valve body 2 to open and close and the valve core 20 are incorporated. The function of the service joint 16 is shared by one component. By arranging the service joint 16 upward, it is possible to shorten the size of the ball valve with the service joint, and to facilitate the air discharge and the supply of the refrigerant of the indoor unit of the air conditioner.

In the locking mechanism of the ball valve element, which is one of the features of the present invention, the handle 19 is formed in a substantially U-shaped or deformed annular shape as shown in the embodiment. Move in a direction perpendicular to the axial direction. Therefore, the operation will be described with reference to FIG. 9 by exemplifying the substantially U-shaped handle 19 assembled as shown in FIG. FIG. 9 (a)-
(E) is a diagram showing a series of positional relationships of the handle 19 with respect to the stopper 17 caulked and fixed to the main body 1,
The ball valve body 2 and the stem 7 always maintain the positional relationship. The positional relationship of the handle 19 with respect to the stem 7 is always maintained in the rotational direction, but the handle 19 can be moved by a certain distance in the directions of arrows x1 and x2 shown in FIG. ing. Therefore, turning the handle 19 causes the stem 7 and the ball valve 2 to rotate synchronously.

FIG. 9A shows a state in which the ball valve body 2 is open.
That is, the handle 19 is turned in the counterclockwise direction, and the handle 19 is moved in the direction of the arrow x1 with the arm 65 abutting against the wall A48 of the stopper 17. In this state, since the wall A48 and the wall B49 of the stopper 17 are provided on both sides of the arm 65 of the handle 19,
Is in a state where it cannot rotate in both clockwise and counterclockwise directions.
Further, in this state, since the stopper 63 of the handle 19 comes into contact with the cylindrical portion D57 of the stem 7, the handle 19 does not move in the direction of the arrow x1 any more.

FIG. 9- (b) shows a state in which the handle 19 has been moved in the direction of the arrow x2 from the state of FIG. 9- (a).
Since the cylindrical portion D57 of the stem 7 and the arm 65 of the handle 19 are in contact with each other, there is no further movement in the x2 arrow direction. When the handle 19 is rotated in the counterclockwise direction, the arm 65 of the handle 19 contacts the wall A48 of the stopper 17 and cannot be rotated. The clockwise rotation is in a rotatable state since the arm 65 of the handle 19 is in a state of being separated from the wall B49 of the stopper 17. FIG. 9- (c)
FIG. 9B shows a state where the angle is appropriately rotated clockwise from the state of FIG. 9B. In this state, the handle 19 cannot move in the z arrow direction. FIG. 9- (d) shows a state in which the ball valve 2 is further rotated clockwise from the state of FIG. 9- (c) and 90 degrees clockwise from the state of FIG. become. In this position, the arm 65 of the handle 19 abuts against the wall C50 of the stopper 17, and does not rotate further clockwise. FIG. 9E shows a state in which the handle 19 is moved in the direction of the arrow Y1 from the state of FIG. 9D, and a wall C50 and a wall D51 of the stopper 17 are provided on both sides of the arm 65 of the handle 19, respectively. Therefore, both the clockwise direction and the counterclockwise direction cannot be rotated. As described above, it is possible to lock the ball valve body 2 in an open state or to lock it in a closed state depending on the relation between the handle 19 and the stopper 17. The explanation of this action is
Although the case where 9 is substantially U-shaped has been described, the same applies when the handle 19 is formed in a deformed annular shape.

Yet another important function is the handle 1
9 and the stem cap 13. The axis center of the stem 7 and the axis center of the cap screw 38 of the main body 1 are concentric.
Also, the four corners a, b, c, and d of the handle 19 shown in FIG. 7 are located at positions related to the circle e, and the circle e is formed to be slightly smaller than the guide diameter 39 of the stem cap 13. Is done. This is because the four corners a, b, c, and d of the handle 19 are fitted as positioning guides for the guide diameter 39 of the stem cap 13 when the stem cap 13 is attached. FIG.
9 (a) and FIG. 9 (e), that is, when the rotation is locked, the center of the circle e of the handle 19 and the axis of the cap screw 38 of the main body 1 are concentric. You. Accordingly, in the states shown in FIGS. 9B, 9C, and 9D, that is, when the rotation is not locked, the center of the circle e of the handle 19 and the axial center of the cap screw 38 of the main body 1 are aligned. It is in an eccentric state. This makes it impossible to attach the stem cap 13 when the handle 19 is not in the locked state. The stem cap 13 can be attached only when the handle 19 is in the locked state, and in the state where the stem cap 13 is attached. Since the handle 19 cannot be moved in any direction, the lock is not released. Therefore, it is possible to reliably prevent an accident such as rotation of the ball valve body 2 due to vibration or the like during operation.

A communication hole A33 is provided at the center of the ball valve body 2. When the ball valve body 2 is opened by rotating the handle 19 counterclockwise as shown in FIG. The communication hole B34, the communication hole A33, and the communication hole C35 communicate with each other to form a straight path. When the ball valve body 2 is rotated by rotating the handle 19 and the ball valve body 2 is rotated 90 degrees clockwise from the open state, the communication hole A33 of the ball valve body 2 communicates as shown in FIG. The position becomes orthogonal to the hole B34 and the communication hole C35, and the valve is closed. In this state, the communication hole C35 and the valve core 20 communicate with each other via the communication passage A37 and the communication hole D36.
1, the communication hole C is drawn from the service joint 16 by evacuation.
The air in the pipe on the 35 side can be discharged.

[Embodiment] An embodiment shown in FIG. 1 will be described. Body 1, ball valve 2, packing 3a, packing 3b, tightening disc 5, connecting pipe 6, blind cap 1
4. The relationship between the flare nut 15 is essentially the same as that of the conventional example. The first feature of the present invention resides in that the stem 7 and the service joint 16 are integrally formed, and the function of the stem 7 for rotating the ball valve body 2 and the function of the service joint 16 are combined. The second feature is that a lock mechanism is provided as a safety mechanism for preventing the ball valve body 2 from rotating due to vibration. As shown in FIG. 1, the lower end of the stem 7 is fitted into the notch groove 4 provided in the ball valve body 2, and an O-ring 8 is provided on the cylindrical portion B54 shown in FIG. The upper part constitutes a service joint 16. Body 1
A stopper 17 is attached to an upper opening of the stem 7 and is fixed by a caulking 18 to prevent the stem 7 from coming off. As shown in FIG. 6, the handle 19 is fitted above the stopper 17 with a pair of parallel C grooves 58 provided on the outer periphery of the stem 7 so as to be movable in a direction perpendicular to the axis of the stem 7. Is attached. By operating the handle 19, the ball valve body 2 rotates to open and close the passage. Also,
A stem cap 13 is attached by screwing so as to cover the service joint 16 and the handle 19, and covers the upper portion of the stem 7.

When the ball valve is attached to the air conditioner, the service joint 16 is usually connected to the connection pipe 6 by piping inside the casing of the outdoor unit of the air conditioner, and the other flare nut 1
The 5 side is connected to the indoor unit by piping when the air conditioner is installed. The refrigerant is filled in the piping of the outdoor unit, the pair of ball valves at the entrance and exit are in a closed state, and air exists in the piping of the indoor unit. In this state, when installing the air conditioner, the outdoor unit and the indoor unit are connected by a pair of pipes to form a sealed cycle. At this time, it is necessary to completely exhaust the air in the cycle on the indoor unit side. . Then, after connecting the charge hose 31 to the service joint 16 and evacuating the air from the charge hose 31 and then opening the ball valve, the operation becomes possible. In order for this operation to function, the valve core 20 of the service joint 16 needs to communicate with the communication hole C35 on the flare nut 15 when the ball valve is in the closed state.
A communication hole D36 and a communication passage A37 are provided in the ball valve body 2 as shown in FIG. The service joint 16 is also used, for example, at the time of additionally filling a refrigerant. In this way, by making the stem 7 and the service coupling 16 integrally compact, the same functions as those of the conventional example can be provided.

A safety device for locking the rotation of the ball valve body 2 is as follows.
It is mainly constituted by the stem 7, the stopper 17, the handle 19, and the stem cap 13. FIG. 3 shows an embodiment of the stopper 17 according to the present invention.
Numeral 7 has a flange 43 for caulking and fixing to the main body 1 at a lower portion, and a column portion A44 having a smaller diameter by one step above the flange 43. Further, a hole 45 for fitting to the stem 7 is provided in the center, and an A groove 46 for forming a wall A48 and a wall B49 is provided in a part of the columnar part A44. D5
1 and the B groove 47 and the B groove 47
Are arranged at an interval of 90 degrees with respect to the center of the hole 45. Further, a wall E52 located between the hole 45 and the cylindrical portion A44 is provided between the A groove 46 and the B groove 47. 4 and 5
Shows another embodiment of the stopper, which is an example of drawing by using a plate material, and has the same configuration as the embodiment shown in FIG.

FIG. 6 shows the structure of the stem 7 according to the present invention. At the lower end of the stem 7, parallel planes A53 for fitting into the cutout grooves 4 of the ball valve body 2 are provided. The portion B54 is provided with an O-ring groove 55. A cylindrical part C56 having a larger diameter is provided on the upper part. Further, a small-diameter cylindrical portion D57 is provided on the upper portion, and the service coupling 16
The valve core 20 is assembled inside, and a pair of parallel C grooves 58 are provided in the cylindrical portion D57.

FIG. 7 shows an embodiment of the handle 19. The handle 19 has a plane C60 on both sides, and both planes are connected by a connecting portion 64 to form a substantially U-shape. A pair of rising portions 62 are provided on both sides of the plane portion, and a plane C6 is provided.
The inside of 0 has straight portions 61 parallel to each other, a stopper 63 is provided at each end, and an arm 65 is provided at the connecting portion 64. The four corners a, b, c, and d of the rising portion 62 have a positional relationship inscribed in the circle e. FIG. 8 shows another embodiment of the handle 19, in which the arm 65 of the embodiment shown in FIG. 7 extends from the inside of the connecting portion 64, whereas this embodiment extends from the outside of the connecting portion 64. is there.

FIG. 10 shows another embodiment of the lock mechanism.
As shown in FIG.
The handle 19 'is provided with a pair of parallel straight portions 61 on the inner facing edge as shown in FIG.
To form a deformed ring. In this case, parallel flat portions B59 are provided on both sides of the stem 7 instead of the C-groove 58 of the previous example so that the deformed annular handle 19 'can be fitted and moved as shown in FIG.

The deformed annular handle 1 in the present embodiment.
The lock mechanism implementing 9 'moves in a direction perpendicular to the axial direction of the stem 7 as in the case of the substantially U-shaped handle 19 of the previous example, and performs the opening / closing locking action of the ball valve body 2. Fig. 14-
FIGS. 14 (a) to (e) are views for explaining the operation of the embodiment of the present lock mechanism, and FIG.
4- (b) is a valve open and unlocked state, FIG. 14- (c) is a half-opened and unlocked state, FIG. 14- (d) is a valve closed and unlocked state, and FIG. 14- (e) is a valve closed. , Locked state, respectively.

FIG. 15 shows an embodiment in which the service coupling 16 is not provided. The service coupling 16 at the upper part of the stem 7 is omitted, and the lock mechanism is kept as it is.

FIG. 16 shows a communication passage A3 provided in the ball valve body 2.
In this embodiment, a communication path B40 is provided in the packing 3a fitted on one side of the ball valve body 2 instead of the communication valve B7.

FIG. 17 shows an embodiment in which the clamping disk 5 is provided with a relief 41 so that the packing 3b can be deformed in order to simultaneously perform the sealing of the packing 3b and the metal sealing of the clamping disk 5. Reference numeral 42 denotes a ball valve. The contact position between the spherical surface of the body 2 and the packing 3b is shown. The diameter ΦA of the relief 41 is the contact 4
It is preferable to make the diameter slightly larger than the diameter ΦB of No. 2.

[Effects of the Invention] In the present invention, a service joint containing a valve core is provided at one end of a stem for opening and closing a ball valve, and this stem is incorporated into a ball valve body containing a ball valve. Because it is an integrated configuration,
It is a ball valve that can efficiently perform operations such as opening and closing a valve, discharging air from a pipe, and charging a refrigerant.

Further, as a safety means for preventing the ball valve body from gradually turning due to vibration during operation to be in a half-open state or a fully-open state, a lock mechanism is provided on a stem for opening and closing the ball valve body. The mechanism is a ball valve by moving a substantially U-shaped or deformed annular handle with a retaining member formed by forming an inner opposed edge into a parallel linear portion in a direction perpendicular to the axial direction of the stem. Since the body is locked or unlocked, the locking action is perfect and the operation is easy.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a valve opening state of an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a valve closed state according to the embodiment of the present invention.

FIG. 3 is a perspective view of one embodiment of a stopper according to the present invention.

FIG. 4 is a perspective view of an embodiment in which the stopper according to the present invention is formed of a plate material.

FIG. 5 is a perspective view of another embodiment in which the stopper is made of a plate material.

FIG. 6 is a longitudinal sectional view showing a structure of a stem according to the present invention.

FIG. 7 is a plan view of one embodiment of the handle of the present invention.

FIG. 8 is a perspective view of another embodiment of the handle of the present invention.

FIG. 9 is an explanatory view showing the operation of the lock mechanism in relation to the stopper and the handle in one embodiment.

FIG. 10 is a longitudinal sectional view of a main part in another embodiment of the lock mechanism.

FIG. 11 is a perspective view of one embodiment of a stopper in another embodiment of a lock mechanism.

FIG. 12 is a perspective view of another embodiment of a handle in another embodiment of a lock mechanism.

FIG. 13 is a perspective view of a stem in another embodiment of the lock mechanism.

FIG. 14 is an explanatory view showing the operation of the lock mechanism in relation to the stopper and the handle in another embodiment of the lock mechanism.

FIG. 15 is a longitudinal sectional view of an embodiment in the case where there is no service joint in the present invention.

FIG. 16 is a perspective view of an embodiment in which a communication passage is provided in the packing in the present invention.

FIG. 17 is an explanatory diagram of a case where sealing of a packing and metal sealing of a tightening disc are performed simultaneously.

FIG. 18 is a longitudinal sectional view of a main part of a conventional ball valve in an open state.

FIG. 19 is a longitudinal sectional view of a main part of a conventional ball valve in a closed state.

20 is an external plan view of the conventional ball valve shown in FIGS. 18 and 19. FIG.

FIG. 21 is a longitudinal sectional view showing an example of mounting a conventional service coupling.

FIG. 22 is a plan view showing a schematic configuration of an outdoor unit of the air conditioner.

FIG. 23 is a front view showing a connection state of a conventional service joint provided in an outdoor unit of an air conditioner.

[Explanation of symbols]

 1. Main body 2. Ball valve 3a. 3b. Packing 4. Notch groove 5 Tightening disk 6 Connection pipe 7.7 '. 7 ".Stem 8. O-ring 9.Pin 10.Driver groove 11.Protrusion 12.Metal packing 13.Stem cap 14.Blind cap 15.Flare nut 16.Service joint 17.17'.17". Stopper 18. Caulking 19.19 '. Handle 20. Valve core 21. Core cap 22. Core stem 23. Entrance 24. Union joint 25. Housing 26. Compressor 27. Outdoor unit fan 28. Outdoor unit heat exchanger 29. Outdoor unit piping 30. Ball valve 31. Charge hose 32. Floor surface 33. Communication hole A 34. Communication hole B 35. Communication hole C 36. Communication hole D 37. Communication path A 38. Cap screw 39. Guide diameter 40. Communication path B 41. Nige 42. Contact position 43. Flange 44. Column part A 45. Hole 46. A groove 47. B groove 48. Wall A 49. Wall B 50. Wall C 51. Wall D 52. Wall E 53. Plane A 54. Column portion B 55. O-ring groove 56. Column portion C 57. Column portion D 58. C groove 59. Plane B 60. Plane C 61. Linear part 62. Rising section 63. Retaining 64. Connection part 65. Arm 66. Standing arm

Claims (4)

[Claims] 1. A ball valve having a communication hole A in the center thereof is disposed in a main body, and packing is provided on both sides of the ball valve. Opening and closing the passage by tightening the ball valve body and packing and turning the ball valve body to change the direction of the communication hole by operating a stem having one end engaged with a notch groove provided in the ball valve body. In the ball valve configured to perform the above operation, a service joint having a valve core built-in at the other end of the stem is integrally formed, and a communication path A that allows the ball valve body or the packing to communicate from the valve core portion to the flare nut side communication hole C. Or a ball valve used for an air conditioner or the like, characterized in that a communication passage B is provided. 2. A ball valve having a communication hole in the center thereof is disposed in the main body, and packing is provided on both sides of the ball valve. Opening and closing of the passage by turning the ball valve body and changing the direction of the communication hole by operating the stem whose one end is engaged with the notch groove provided in the ball valve body while tightening the ball valve body and the packing. In the ball valve configured to perform, on the outer periphery of the stem, a pair of parallel linear portions provided on the inside of the handle are engaged, and a pair of parallel portions formed of grooves or flat portions is provided. A lock mechanism for a ball valve used in an air conditioner or the like, wherein a handle that moves in a direction perpendicular to the axial direction of the stem is provided in the parallel portion. 3. The handle according to claim 2, wherein the handle has a pair of rising portions on both sides of the flat portion, and the inner facing edges are formed as a pair of parallel straight portions, and are formed in a direction perpendicular to the axial direction of the stem. 3. The ball valve lock mechanism used in an air conditioner or the like according to claim 2, wherein the lock mechanism is formed in a substantially U-shape so as to be inserted. 4. The handle according to claim 2, wherein the inner facing edges are formed as a pair of parallel straight portions, and are formed in a deformed annular shape so as to be inserted from above the stem. 2. A ball valve lock mechanism used for an air conditioner or the like.