JPH0519745U - Fluid control device using ball valve - Google Patents

Abstract

(57) [Abstract] [Purpose] In a fluid control device using a ball valve, the number of parts of a seal member is reduced, and the device is reduced in size and weight. A valve body (21) having a fluid inlet (22) and a fluid outlet (23) through which the fluid flows from the fluid inlet (22) toward the fluid outlet (23) is provided, and a spherical valve body (24) that interrupts the flow of the fluid is provided in the valve body (21). 21 rotatably provided,
A discharge port body 32 having a discharge port 30 is rotatably fitted to the fluid outlet 23 side of the valve body 21, and the spherical valve body 2
A seal ring 39, which abuts the outer peripheral surface of No. 4, was attached to the discharge port body 32.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fluid control device using a ball valve which has a rotary discharge port and is used in a discharge port of a portable fire pump.

[0002]

[Prior Art]

 Conventionally, there are various types of fluid control devices using a ball valve, for example, the one shown in FIG. First, there is provided a valve body 3 having a fluid inlet 1 formed at one end and a fluid outlet 2 formed at the other end. Inside the valve body 3, the fluid inlet 1 is connected to the fluid outlet 2. A spherical valve body 4 that intermittently interrupts the flow of the flowing fluid is accommodated rotatably. A support shaft 5 for rotatably supporting the spherical valve body 4 is arranged with an axis center orthogonal to the flow axis of the fluid, and one end of the support shaft 5 is placed outside the valve body 3. An operation handle 6 for rotating the spherical valve body 4 is attached to a front end portion of the support shaft 5 which is protruded and protruded to the outside of the valve body 3. Further, the spherical valve body 4 is formed with an inlet 7 communicating with the fluid inlet 1 and an outlet 8 communicating with the fluid outlet 2 as the spherical valve body 4 is rotated. ..

Next, on the fluid outlet 2 side of the valve body 3, a flange portion 10 of a valve seat 9 is tightened and fixed by a plurality of bolts 11, and further formed on the outer peripheral surface of the valve seat 9. A discharge port body 14 having a discharge port 13 is rotatably screwed into the screw portion 12.

Here, when the valve seat 9 is clamped and fixed, the valve seat 9 and the valve body 3 bring the seal ring 15 into contact with the outer peripheral surface of the spherical valve body 4, and the seal ring 15 A ring-shaped holder 16 for holding the valve body and an external seal 17 for sealing between the valve body 3 and the valve seat 9 are sandwiched. Further, a rotary seal 18 is interposed between the valve seat 9 and the discharge port body 14.

[0005]

[Problems to be solved by the device]

 First, since the valve seat 9 is attached to the fluid outlet 2 side of the valve body 3 and the discharge port body 14 is attached to this valve seat 9, the dimension from the fluid inlet 1 of the valve body 3 to the center of the discharge port 13 is large. Therefore, there is a drawback that the fluid control device using the ball valve becomes larger and heavier, which makes it inconvenient to move and store.

Further, as the seal member, the seal ring 15, the external seal 17, and the rotary seal 18 are required, and the number of sealing points increases and the number of fluid leakage points increases, which lowers reliability. I am

Further, the valve seat 9 is attached to the valve body 3 by tightening the flange portion 10 with a plurality of bolts 11, but the number of protrusions such as the flange portion 10 and the bolts 11 increases. There is a risk that an operator may hit the projections with his / her hand to get injured when the operation handle 6 is operated or the rotation of the discharge port body 14 is performed, and the appearance is impaired by the presence of the projections. There is a drawback.

[0008]

[Means for Solving the Problems]

 According to another aspect of the present invention, a valve body is provided which has a fluid inlet and a fluid outlet and through which the fluid flows from the fluid inlet to the fluid outlet, and the spherical valve body which interrupts the flow of the fluid is provided in the valve body. A discharge port body that is rotatably provided inside and has a discharge port is rotatably fitted into the fluid outlet side of the valve body, and a seal ring that abuts the outer peripheral surface of the spherical valve body is provided on the discharge port body. I installed it.

According to a second aspect of the present invention, there is provided the device according to the first aspect, wherein a retaining rotation mechanism that retains the outlet body while retaining the outlet body and the outlet body and the valve body is provided. And an external seal for sealing the inside of a space between the inner peripheral surface of the valve body on the fluid outlet side of the rotational axis of the spherical valve body and the rotational trajectory of the outer peripheral surface of the spherical valve body. The retaining rotation mechanism, the external seal, and the seal ring are arranged in the.

[0010]

[Action]

 According to the first aspect of the invention, the seal ring prevents the fluid from leaking from the valve body to the discharge port body when the flow of the fluid is blocked by the spherical valve body, and prevents the fluid from being discharged when the discharge port body is rotated. In order to prevent leakage, the number of parts of the seal member is reduced and the risk of fluid leakage is reduced.

According to the second aspect of the present invention, the spherical valve body, which is a substantially spherical body, is incorporated into the valve body from the fluid outlet side of the valve body. The space between the inner peripheral surface of the valve body and the rotation locus of the outer peripheral surface of the incorporated spherical valve body becomes a dead space, and the retaining rotation mechanism and the external seal are inserted into this dead space. By providing the seal ring, the fluid control device using the ball valve can be reduced in size and weight.

[0012]

【Example】

 An embodiment of the present invention will be described with reference to FIG. First, a valve body 21 connected to the discharge port 20 side of the pump 19 is provided, and a fluid inlet 22 communicating with the discharge outlet 20 is formed at one end of the valve body 21. A fluid outlet 23 is formed at the end. A spherical valve body 24, which interrupts the flow of the fluid flowing from the fluid inlet 22 to the fluid outlet 23, is rotatably accommodated in the valve body 21, and the spherical valve body 24 is housed in the valve body 21. A support shaft 25 rotatably supported is disposed with an axis center orthogonal to the flow axis of the fluid, and the spherical valve body 24 is rotated at one end of the support shaft 25 protruding to the outside of the valve body 21. An operation handle 26 for operation is attached. The spherical valve body 24 is formed with an inlet 27 communicating with the fluid inlet 22 and an outlet 28 communicating with the fluid outlet 23 as the spherical valve body 24 is rotated.

Here, the assembling of the spherical valve body 24 having a highly accurate spherical surface and having a substantially spherical shape into the valve body 21 is performed from the side of the fluid outlet 23. On the fluid outlet 23 side, a cylindrical portion 29 having an inner diameter larger than the outer diameter of the spherical valve body 24 is formed.

Next, a discharge port body 32 having a discharge port 30 and a check valve 31 is fitted and inserted into the cylindrical portion 29 of the valve body 21. A groove 33 having a substantially semicircular cross section is formed in a ring shape on the inner peripheral surface of the cylindrical portion 29, and the discharge outlet body 32 is fitted to the cylindrical portion 29 on the outer peripheral surface of the discharge outlet body 32. When inserted, a groove 34 having a substantially semicircular cross section is formed in a ring shape so as to face the groove 33. Then, the discharge port body 32 is prevented from being pulled out from the cylindrical portion 29 by the grooves 33 and 34 and the plurality of spherical bodies 35 inserted into the grooves 33 and 34 facing each other, and A retaining rotation mechanism 36 that rotatably holds the body 32 is formed. An insertion port 37 for inserting the sphere 35 into the grooves 33, 34 is formed on the outer peripheral portion of the valve body 21, and a sealing screw 38 is screwed into the insertion port 37. ing.

Further, a ring-shaped seal ring 39 that is brought into contact with the outer peripheral surface of the spherical valve body 24 is attached to the discharge port body 32, and further, the cylindrical portion 29 and the discharge port body 32. A ring-shaped external seal 40 is interposed between them. The seal ring 39, the outer seal 40, and the retaining rotation mechanism 36 are connected to the inner peripheral surface of the cylindrical portion 29, which is closer to the fluid outlet 23 than the rotation shaft center surface of the spherical valve body 24. It is arranged in a space which is a dead space between the spherical valve element 24 and the rotation locus of the outer peripheral surface thereof.

In such a configuration, a state in which the spherical valve body 24 is rotated by operating the operation handle 26 to make the fluid inlet 22 and the inlet 27 communicate with each other and the fluid outlet 23 and the outlet 28 communicate with each other. When the pump 19 is driven by, the fluid protruding from the discharge port 20 of the pump 19 flows into the inside of the spherical valve body 24 through the fluid inlet 22 and the inlet 27, and further through the outlet 28 and the fluid outlet 23. After the check valve 31 is pushed up and flows into the discharge port body 32, the flow direction is changed and water is discharged from the discharge port 30. Then, the water discharge direction can be changed by manually rotating the discharge port body 32 in an arbitrary direction. During the rotation operation of the discharge port body 32, the discharge port body 32 is smoothly rotated by the retaining rotation mechanism 36 and is retained. Further, the external seal 40 prevents the fluid from leaking between the cylindrical portion 29 and the discharge port body 32.

Next, by operating the operation handle 26, the spherical valve body 24 is rotated around the support shaft 25, and the spherical valve body 24 is rotated until the seal ring 39 does not contact the outlet 28. When the communication state between the outlet 28 and the fluid outlet 23 is cut off, the seal ring 39 prevents the fluid from leaking from the inside of the valve body 21 into the inside of the discharge port body 32, and stops the water discharge from the discharge port 30. Further, when the discharge body 32 is rotated from the water discharge stopped state, the sealing ring 39 which rotates integrally with the discharge body 32 rotates while contacting the outer peripheral surface of the spherical valve body 24. In addition, leakage of fluid from the inside of the valve body 21 into the inside of the discharge body 32 is prevented.

Further, as compared with the conventional example shown in FIG. 2, since the protrusions such as the flange portion 10 and the bolt 11 are removed from the outer peripheral portion of the valve body 21, the operation handle 26 is operated and the discharge port body 32 is rotated. There is no risk that an operator may hit his or her hand on these protrusions and get injured during dynamic operation. Further, the appearance of the fluid control device using the ball valve is improved because the protrusion is eliminated.

[0019]

[Effect of the device]

 A valve body having a fluid inlet and a fluid outlet and rotatably accommodating a spherical valve body for interrupting the flow of the fluid flowing from the fluid inlet to the fluid outlet is provided, The discharge valve body that has an outlet is rotatably fitted on the fluid outlet side, and a seal ring that contacts the outer peripheral surface of the spherical valve body is attached to the discharge body. It is possible to prevent the fluid from leaking from the inside of the valve body into the discharge port body when the body is rotated to block the flow of the fluid, and at the same time, to discharge from the inside of the valve body when the discharge port body is rotated. It is possible to prevent the fluid from leaking into the outlet body. Therefore, since the seal ring serves as a sliding seal for the spherical valve body and a rotating seal for the outlet body, the number of parts of the sealing member is reduced. cost It is possible to reduce the number of places where the fluid leaks and to improve the reliability of the fluid control device using the ball valve. Further, as in the invention of claim 2, A retaining rotation mechanism that retains the body and retains it rotatably, an external seal that seals between the discharge port body and the valve body, and a seal ring are provided from the rotation axis center surface of the spherical valve body. By arranging in a space that is a dead space between the inner peripheral surface of the valve body on the outlet side and the rotation trajectory of the outer peripheral surface of the spherical valve body, the fluid control device using a ball valve can be downsized and It has effects such as weight reduction.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing an embodiment of the present invention.

FIG. 2 is a vertical sectional front view showing a conventional example.

[Explanation of symbols]

 21 valve body 22 fluid inlet 23 fluid outlet 24 spherical valve body 30 discharge port 32 discharge port body 35 retaining rotation mechanism 39 seal ring 40 external seal

Claims (2)

[Scope of utility model registration request] 1. A valve body having a fluid inlet and a fluid outlet, through which fluid flows from the fluid inlet to the fluid outlet, and a spherical valve body for interrupting the flow of the fluid is rotated in the valve body. A discharge port body that is freely provided and has a discharge port is rotatably fitted into the fluid outlet side of the valve body, and a seal ring that abuts the outer peripheral surface of the spherical valve body is attached to the discharge port body. A fluid control device using a characteristic ball valve. 2. A rotation prevention mechanism for retaining the discharge port body and rotatably holding the discharge port body, and an external seal for sealing between the discharge port body and the valve body. The retaining rotation mechanism, the external seal, and the seal ring are provided in a space between the inner peripheral surface of the valve body on the fluid outlet side of the moving shaft center surface and the rotation trajectory of the outer peripheral surface of the spherical valve body. The fluid control device using the ball valve according to claim 1, wherein the fluid control device is provided.