JPH038870Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a control valve unit, and more specifically, the invention relates to a control valve unit. The present invention relates to a control valve unit that forms a control valve by fitting together.

[Prior Art] Conventionally, control valve units in which a valve body is fitted into a pipe body having a substantially T-shaped hole have been widely adopted in order to control the flow rate, pressure, or direction of fluid in the middle of a flow path. has been done. A schematic configuration of a control valve unit according to this type of prior art is illustrated in FIG.

In the figure, reference numeral 2 designates a control valve unit;
For example, a speed controller is shown, and this control valve unit 2 consists of a pipe body 4 and a valve mechanism section 6. The tubular body 4 is formed with a through hole 8 penetrating in the vertical direction in the figure, and a side hole 10 communicating with the through hole 8, resulting in a substantially T-shaped hole. On the other hand, a valve mechanism section 6, which is shown in a simplified manner, is inserted into the through hole 8. In this case, a side hole 10 is formed inside the valve mechanism section 6 and between the valve mechanism section 6 and the pipe body 4.
A predetermined flow path communicating with the flow path is formed, and a valve body (not shown) is disposed in the flow path, thereby forming a control valve. Such a control valve unit 2 controls, for example, the flow rate of fluid flowing in the direction indicated by arrow A or B. Therefore, if the valve mechanism 6 is displaced in the axial direction of the through hole 8 due to fluid pressure during control or some external force, not only will the desired control function not be achieved, but the fluid will Occasionally, you may encounter an accident that results in a spill. For this reason, in an actual control valve unit, a restraining means is constructed to prevent the valve mechanism from shifting and separating from the pipe body.

Therefore, a specific example of a control valve unit is shown in FIG. 2 to explain the restraining means. The control valve unit 12 shown in FIG. 2 consists of a pipe body 14 and a valve mechanism section 16. The tube body 14 is made of metal, and the body 18 constituting the valve mechanism section 16 is also made of a metal member. Therefore, this type of control valve unit 12
is characterized by high heat resistance. Said body 1
An annular recess 20 is formed near the threaded portion 19 formed at one end of the ring 8, and a ring 22 is fitted into the recess 20 with the ring 22 protruding outward. Furthermore, a nut 26 is screwed into a threaded portion 24 formed on the other end side of the body 18. Therefore, by screwing the nut 26, the valve mechanism section 16 is fixed to the tube body 14 by a holding means that clamps the tube body 14 between the nut 26 and the ring 22.

That is, in this way, the pipe body 14 and the valve mechanism section 1
When both bodies 18 of 6 are made of a hard member such as metal, a ring 22 is attached to one end of the body 18.
It is common to form a locking part using a screw and to construct a holding means by providing a screw nut 26 on the other end of the body 18.

[Problems to be solved by the invention] However, in such a case, since the nut 26 is required and the threaded portion 24 must be formed on the body 18, there is a limit to miniaturization and weight reduction of the control valve unit 12 itself. There is. Furthermore, the work of forming the threaded portion 24 and the work of forming the locking portion using the ring 22 are complicated. In addition, when using the control valve unit 12, the screw portion 19 is screwed into a predetermined screw hole, and the pipe body 14 having an internal screw is screwed into a predetermined screw hole.
A pipe (not shown) is screwed into the side hole 28 to connect the flow path. At that time, if the valve mechanism part 16 is fixed to the pipe body 14 by the threading of the nut 26, by screwing the threaded part 19 into the threaded hole, the direction in which the side hole 28 opens, that is, the piping The direction is determined. Therefore, in order to arbitrarily set the piping direction, after screwing the screw portion 19, loosen the nut 26, rotate the pipe body 14 in the desired direction about the body 18, and then tighten the nut 26. Conventionally, it has been pointed out that such work is extremely complicated.

On the other hand, a control valve unit that can easily obtain an arbitrary piping direction has also been developed, and an example thereof is shown in FIG. 3.

The control valve unit 30 shown in FIG. 3 consists of a pipe body 32 and a valve mechanism section 34. The control valve unit 30 shown in FIG. The tubular body 32 is made of elastic synthetic resin, and in this case, a side hole 36 of the tubular body 32 is provided with a pipe joint mechanism 38 for easily attaching and detaching a piping tube. A body 40 constituting the valve mechanism section 34 is made of metal, and an annular protrusion 42 is formed on the body 40. That is, the protrusion 42 is connected to the through hole 44 of the tube body 32.
The body 40 is held in place by the tube 32 by being inserted into the circumferential surface defining the tube 32 . Therefore, the restraining means in this case is by inserting the protrusion 42 into the tube body 32, and as a result, the tube body 32 can be rotated in any direction with respect to the valve mechanism section 34. Therefore, the desired piping direction can be easily obtained.

However, as described above, this control valve unit 30 has low heat resistance because the tube body 32 is made of synthetic resin. For example, if the control valve unit 30 is used near a welding machine, the pipe body 32 may be burned out by flying spatter, making it impossible for the control valve unit 30 to achieve the desired function.

In other words, with the control valve unit according to the conventional technology, it is impossible to simultaneously satisfy all the requirements of being able to easily change the piping direction, having excellent heat resistance, and achieving further reduction in size and weight. It was hot.

Accordingly, an object of the present invention is to provide a control valve unit that allows the piping direction to be freely set, has excellent heat resistance, and can be made smaller and lighter.

[Means for Solving the Problems] In order to achieve the above-mentioned problems, the present invention provides a side hole portion having a through hole penetrating in the axial direction and defining a fluid passage communicating with the through hole; a metal tube having an annular recess defined at one end of the hole; and a synthetic resin body having elasticity and fitting into the recess of the metal tube and surrounded by the tube. a bushing that is inserted into the through hole of the metal tube body and has a shoulder portion that locks onto one end of the tube body, and is integrally provided on the other end side and is pierced by the bushing. and a control valve having a tapered protrusion whose diameter decreases from the shoulder side to the bushing side, and the control valve has a hole communicating with a fluid passage defined in the metal pipe body. and a valve body facing the hole, and further characterized in that the metal pipe body is configured to be rotatable with respect to the control valve.

[Operation] The control valve is inserted through the through hole of the metal tube, and its protrusion is inserted into the bush. Therefore, since the control valve is firmly held against the metal tube and is rotatable relative to the tube, a desired piping direction can be selected. Moreover, since the tube and body are made of metal, they are highly heat resistant and
Smaller size and lighter weight are achieved.

[Embodiments] Next, preferred embodiments of the control valve unit according to the present invention will be described in detail with reference to the accompanying drawings.

In FIG. 4, reference numeral 50 indicates a control valve unit according to the present invention, and the control valve unit 50
consists of a tube body 52, a control valve 54 and a bush 56.

The tube body 52 is made of metal and has a bent shape, and is formed with a through hole 58 penetrating in the vertical direction in the figure and a side hole 60 communicating with the through hole 58, resulting in a substantially T-shaped body. A hole is configured. An annular recess 62 is formed on one opening side of the through hole 58 . Further, an internal threaded portion 64 for connecting a flow path is carved on one opening side of the side hole 60. That is, when using the control valve unit 50, a pipe (not shown) is screwed into the internal threaded portion 64.

On the other hand, the body 66 constituting the control valve 54 is made of metal. In this case, it is possible to use a valve mechanism having various control valve functions, but in this embodiment, a control valve 54 that constitutes a speed controller consisting of a variable throttle valve and a check valve is used. ing. A threaded portion 68 for connecting a flow path is carved on the outer circumferential surface of one end of the body 66. That is, when using the control valve unit 50, the screw portion 68 is screwed into a screw hole drilled in an actuator or the like. Following the threaded portion 68, a first circumferential surface portion 70 and an annular projection portion 72 protruding outward from the first circumferential surface portion 70 are formed. In this case, the cross section of the tip of the protrusion 72 is a right triangle, and the diagonal part of the triangle is the first
It is formed so as to expand from the peripheral surface portion 70 side.
Note that a recess is formed between the first circumferential surface portion 70 and the projection portion 72, and an O-ring 74 for sealing is fitted therein.

Further, a second circumferential surface portion 76 is formed above the projection portion 72 in the figure, and the second circumferential surface portion 76
A recess is carved in the hole and an O-ring 78 for sealing is fitted therein. Further, the other end of the body 66 is provided with a body 66.
By forming a shoulder portion 80 in the shape of a hexagonal plate that bulges out in the diametrical direction, a step portion 82 continuing to the second circumferential surface portion 76 is defined.

The above configuration of the control valve 54 mainly relates to the restraining means, and next, the configuration of the flow path etc. will be explained.

That is, a hole 84 is bored through the body 66 along the central axis of the body 66, and in this case,
The valve seat portion 86 is formed by selecting a small diameter near the center of the hole portion 84 . A guide member 90 having a screw hole 88 is fixed to the approximately central portion of the shoulder portion 80 so as to be buried therein. Furthermore, the hole 84
Holes 92 and 94 are formed between the protrusion 72 and the second circumferential surface 76 and extend through the body 66 at right angles. Further, as shown in the figure, when the diameter of the portion from the protrusion 72 to the second circumferential surface portion 76 is appropriately selected and the body 66 is fitted into the tube body 52, the protrusion portion 72 and the second circumferential surface portion 76 are The circumferential surface portion between the surface portion 76 and the tubular body 52 is configured to define a space.
A recess is formed in the peripheral surface between the holes 92 and 94, and an annular check valve main body 96 is fitted into the recess. On the other hand, the throttle valve main body 98 is screwed into the hole 84 through the screw hole 88 so as to be close to the valve seat 86 . The control valve 54 is configured as described above.

Furthermore, the bush 56 is approximately cylindrical,
Constructed of synthetic resin to have elasticity. The thickness of the bushing 56 is selected to be larger than the depth of the recess 62 when the horizontal direction in the figure is taken as a reference. Note that a recess is cut into the outer peripheral surface of the bush 56, and an O-ring 100 for sealing is fitted into the recess.

When configuring the control valve unit 50, the control valve 5
4 is inserted into the through hole 58 of the tubular body 52 from the top to the bottom in the figure, and the shoulder portion 80 is brought into contact with the tubular body 52.
Therefore, the stepped portion 82 comes into contact with a portion of the tube body 52 that defines the opening of the through hole 58 . Then, while maintaining this state, the bush 56 is fitted onto the body 66 from the threaded portion 68 side and moved upward in the figure.
Finally, the bush 56 is fitted into the recess 62 of the tube body 52. At this time, the projection 72 of the body 66 penetrates into the inner peripheral surface of the elastic bush 56, and the first peripheral surface 70 comes into contact with the bush 56, causing the bush 56 to come into strong pressure contact with the recess 62. . That is, the holding means for the control valve unit 50 is mainly based on the insertion action of the protrusion 72 into the bush 56, and other means include pressure contact between the first circumferential surface part 70 and the bush 56, and the action of the bush 56 against the recess 62. Pressure welding and locking, and step part 8
The holding means is constituted by various functions such as locking of the tube body 52 with the tube body 52. As described above, the control valve 54 is fitted into the pipe body 52, and the control valve unit 5
0 is configured.

The control valve unit according to the present invention is basically constructed as described above, and its operation and effects will be explained next.

First, in the configuration stage of the control valve unit 50, when the bush 56 is moved upward in the figure from the screw portion 68 side, the protrusion portion 72 has an inclined portion that expands from the first circumferential surface portion 70 side. Therefore, the bush 56 can be displaced to a predetermined position without being locked in contact with the protrusion 72. That is, since the protrusion 72 can be inserted into the inner circumferential surface of the bush 56 without any difficulty, the control valve unit 50
The assembly work is easy. Furthermore, as can be understood from the shape of the protrusion 72 shown in FIG.
6, the protrusion 72 reliably holds the tube 52 together with the shoulder 80 via the bush 56. Therefore, the control valve 54 does not shift in the axial direction of the through hole 58 with respect to the pipe body 52.
A suitable restraining state can be obtained. Further, in the conventional control valve unit 12 shown in FIG. 2, a nut 26 and a ring 22 are used as means for holding the valve mechanism section 16 and the pipe body 14, but in the control valve unit 50 of this embodiment, the above-mentioned No need for such nuts and rings. That is, unlike the conventional control valve unit 12, the control valve unit 50 does not have a nut for fixing a valve mechanism part and a screw part for screwing the nut, so that it is smaller and lighter. Furthermore, as described above, since a ring for fixing the valve mechanism is not required, the configuration of the control valve unit is further simplified. Moreover, in the control valve unit 50, since the recessed portion 62 is formed in the metal tube body 52, further weight reduction can be achieved.

On the other hand, when using the control valve unit 50,
By rotating the hexagonal plate-shaped shoulder portion 80 using a predetermined tool, the threaded portion 68 is adapted to and screwed into the threaded hole of the actuator, etc., and further the inner threaded portion 6 is screwed.
4. Screw a pipe (not shown) into 4. At this time, the control valve 54 is basically held in the tube body 52 by inserting the annular protrusion 72 into the bush 56. or slidable relative to the body 66;
It is easy to pivot the tube body 52 around the control valve 54. That is, it is possible to freely select the piping direction of the pipe connected to the tube body 52. Further, when the screw portion 68 is screwed into a predetermined screw hole, the portion defining the opening of the screw hole comes into contact with or comes close to the bush 56. Therefore, the outer portion of the control valve unit 50 is in a state similar to that entirely made of metal.
High heat resistance can be obtained.

Next, in the control valve unit 50 configured as described above, when pressure fluid is supplied to the side hole 60, the check valve main body 96 blocks the flow of fluid, and the fluid passing through the hole 94 is The flow rate passing through is restricted by the gap between the throttle valve body 98 and the valve seat 86 and is sent out from the opening of the hole 84 . In this case, the passing flow rate is adjusted by displacing the throttle valve main body 98. On the other hand, when fluid is pressurized from the opening side of the hole 84, most of the fluid passes through the hole 92 and passes through the check valve body 96, and a portion of the fluid flows through the gap. and through the hole 94, and eventually the fluid is delivered through the side hole 60. That is, the control valve unit 50 has a function as a speed controller, and if the check valve main body 96 is turned upside down and fitted to the body 66 as shown in the figure, the flow direction that restricts the passing flow rate is reversed. It is easy to understand what happens.

In this embodiment, a control valve 54 constituting a speed controller is used as the valve mechanism, but by changing the configuration of the control valve 54, it is possible to perform functions of a control valve different from the above, such as a pressure control valve. Of course, it is possible to construct a new control valve unit with

[Effects of the invention] According to the invention, as described above, the tapered protrusion formed on the metal body constituting the control valve is inserted into the elastic substantially cylindrical bush, and the bush is is fitted into a metal tubular body, thereby making the tubular body rotatable. Therefore, the piping direction with respect to the control valve unit is not limited, and furthermore, since the pipe body and the control valve are made of metal, the heat resistance is high.

In addition, since the bush is also surrounded by the tube, it is not particularly damaged by flying spatter or the like. As a result, it is possible to install the control valve unit in factories where spatters fly or in narrow spaces without particularly limiting the usage conditions of the control valve unit.

Furthermore, since the tip of the protrusion is formed into a tapered shape, when the protrusion is inserted into the bush, together with the presence of the shoulder, it is possible to prevent the control valve from coming off from the pipe body. Therefore, a reduction in size and weight can be achieved without requiring a nut or the like as a holding means.

Although the present invention has been described above with reference to a preferred embodiment, the present invention is not limited to this embodiment. Of course, various improvements and changes in design are possible without departing from the gist of the present invention.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view for explaining the basic configuration of a control valve unit, Fig. 2 is a sectional view showing a first example of a control valve unit according to the prior art, and Fig. 3 is a control valve unit according to the prior art. A sectional view showing a second example of the valve unit, FIG. 4 is a sectional view of the control valve unit according to the present invention. 50...Control valve unit, 52...Pipe body, 54
... Control valve, 56 ... Button, 62 ... Recess,
66...Body, 72...Protrusion, 80...Shoulder, 82...Step.

Claims (1)

[Claims for Utility Model Registration] A side hole portion having a through hole penetrating in the axial direction and defining a fluid passage communicating with the through hole, and an annular recess defined at one end side of the through hole; a bush made of a synthetic resin body that has elasticity and fits into a recess of the metal tube and is surrounded by the tube, and a through hole in the metal tube. It has a shoulder that is inserted into the tubular body and locks on one end of the tube body, and is integrally provided on the other end of the tubular body so as to penetrate into the bushing and contract from the shoulder side to the bushing side. a control valve having a tapered protrusion having a diameter, the control valve having a hole communicating with a fluid passage defined in the metal tube, and a valve body facing the hole. The control valve unit is further characterized in that the metal tube is configured to be rotatable with respect to the control valve.