JPH089495Y2 - Valve device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a valve device, and mainly relates to improvement of a valve device disposed in a flow path for transferring a fluid such as powder or oil having a high temperature.

(Prior Art) As a valve device arranged in a flow path for transferring a fluid having a high temperature, for example, a powder heated to a high temperature, the following is known. That is, a valve main body having a fluid flow path and a closing wall is rotatably mounted in a valve housing having a fluid inflow pipe and an outflow pipe, and the valve main body having a fluid flow passage and a closing wall is rotatably mounted inside the valve casing A tube body provided with a valve seat at the inner end of the valve body is inserted and brought into contact with the outer peripheral wall of the valve body, and the valve body is appropriately rotated to open or close the flow path, or 2. Description of the Related Art A valve device configured to adjust the opening of a flow path to transfer a fluid and interrupt the transfer or adjust the transfer amount is well known.

Further, in the above valve device, each tubular body having a valve seat inserted into both the inflow pipe and the outflow pipe of the valve casing is configured to be movable back and forth using a cylinder mechanism such as an oil cylinder or an air cylinder, and Recently, a valve device has been used, which is configured so that the seat can be brought into contact with and separated from the outer peripheral wall of the valve body for convenience of use.

(Problem to be solved by the invention) However, in the former case of the above-mentioned conventional examples, both the pipe body having the valve seat inserted into the fluid inflow pipe and the outflow pipe in the valve casing are fixed together, Since each valve seat is in contact with the outer peripheral wall of the valve body in a fixed state, when the valve body is rotated to stop the flow of fluid or adjust the flow rate, the valve seat It is difficult to avoid a part of the powder from entering the flow path of the valve body, and therefore powder that retains high temperature may adhere to the valve seat. If this situation occurs repeatedly, the valve body and valve seat slide against each other. If the valve body does not move smoothly, the valve body will not be able to rotate as required, resulting in a serious obstacle.

In the latter case, although the above obstacles can be avoided, both the equipment cost and the equipment space increase because the cylinder mechanism is used to move the two pipes with the valve seat inserted into the valve housing back and forth. However, it is extremely uneconomical, and when a fluid with a high temperature flows, the air or oil that is the operating source of the cylinder expands under the influence of the high temperature, so it is necessary to specially provide a reasonable escape area. Therefore, there is a problem that the structure of the cylinder mechanism is further complicated and the equipment cost is further increased.

Further, in both cases, since the tube body having the valve seat is provided in both the inflow pipe and the outflow pipe of the fluid in the valve casing, for example, during the transfer process of the powder fluid or the adjustment of the transfer flow rate. At this time, if a part of the powder falls below the inside of the valve housing, there is no action to guide and guide it to the outflow pipe side at all, and the accumulated powder continues to accumulate and transfer the powder fluid. There is a problem that it causes problems.

The present invention has been researched and developed with the object of solving the above problems, and has a remarkably simple structure that does not hinder the smooth rotation of the valve body even if it is used for a long period of time. Another object of the present invention is to provide a valve device that does not accumulate powdered fluid or the like in the valve housing and is extremely simple and easy to operate at low cost.

(Means for Solving the Problem) As means for solving the above-mentioned problems, in the present invention, a fluid passage and blockage rotatably mounted in a valve casing having a fluid inlet and a fluid outlet. A valve body having a wall and a pipe body having a valve seat at an inner end slidably installed on the fluid inlet side of the valve casing, and oblique to the pipe axis on the outer peripheral side of the pipe body. A wedge-shaped body is provided, and an operating rod having a wedge groove engaged with the wedge-shaped body is provided. By moving the operating rod forward and backward, the pipe body is advanced and retracted through the wedge body and the wedge groove, and the valve seat thereof is provided. Is configured to be brought into contact with and separated from the outer peripheral wall of the valve body, and the valve chamber and the outlet can always be communicated with each other without providing a pipe having a valve seat on the fluid outlet side of the valve casing. A characteristic valve device was developed and adopted.

(Operation) In the valve device configured as described above, the case where the valve body is opened to allow the fluid to flow will be described with reference to an example of the drawing. When the operating rod is first pulled up and retracted, the wedge groove of the operating rod is moved. And the wedge body obliquely provided on the pipe body having the valve seat, the pipe body retreats in the direction opposite to the valve body and separates from the valve body, and a gap is created between the valve seat and the valve body. . In this state, the valve rod is turned to rotate the valve body, the flow path and the pipe mouth of the pipe body are aligned with each other, and then the operating rod is pushed down to move the pipe body forward. Since the valve seat is in close contact with the outer peripheral wall of the peripheral region of the flow passage of the valve main body, the flow passage of the pipe body and the valve main body are completely communicated with each other to allow fluid flow. Also, when closing the valve body, the actuating rod is operated in the same manner as above to form a gap between the valve seat of the tubular body and the valve body, and in this state, the valve stem is turned to turn the valve body. When the operating rod is actuated in the same manner as above, after moving the same to match the positions of the obstruction wall and the tube mouth of the tube,
Since the tubular body advances and its valve seat comes into close contact with the closing wall of the valve body, the flow passage between the tubular body and the valve body is completely cut off.

As described above, in the present invention, since the valve body can be rotated under the condition that the gap is formed between the valve seat and the valve body of the pipe body, the valve body can be rotated without sliding on the valve seat. It has the effect of opening and closing the valve smoothly.

Further, the pipe having the valve seat is provided only on the fluid inlet side of the valve casing, and is not provided on the outlet side, and the valve chamber and the outlet are always in communication with each other. Even if a part of the powder falls in the valve chamber during the transfer, the powder is surely guided and guided to the outlet side to prevent the accumulated powder from accumulating.

(Embodiment) Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. 1 is a valve device equipped in a transfer passage of a fluid (powder, liquid, gas) having a high temperature. A valve casing 7 including an inflow pipe 3 having an inflow port 2 on one side, an outflow pipe 5 having an outflow port 4 on the other side, and a valve chamber 6 in an intermediate portion; The flow passage 8 is rotatably disposed in the flow passage 8, that is, the flow passage 8 is aligned with the axial direction of the inflow pipe 3 and the outflow pipe 5, and the blocking walls 9 are provided on both sides of the flow passage 8.
And a tapered valve seat 11 at the inner (valve body 10 side) end, which is slidably and tightly fitted in the inflow pipe 3 of the valve housing 7. It is composed of a tubular body 12.

In addition, a pipe having a valve seat is not provided on the fluid outlet 4 side of the valve housing 7, and therefore the inside of the valve seat 6 and the outlet 4 are always in communication with each other.

Thus, the valve body 10 is a support shaft whose lower central portion is projected inward from the valve casing 7, as clearly shown in FIG.
The valve rod 14 is supported by 13 and has a valve rod 14 projecting from the upper central portion thereof.
Is to open or close the flow path 8 manually or electrically by a required angle (90 degrees) through a lever, a motor or the like when necessary, and to keep the valve 12 in close contact with the valve seat 11 of the pipe body 12. The contact surface with the valve seat 11 is also formed into a tapered surface so as to keep it in good condition.

Further, as clearly shown in FIGS. 2 to 5, the tubular body 12 having the valve seat 11 is provided on one side of the outer peripheral surface of the approximately central portion of the tubular body 11 with respect to the axial center of the tubular body. And a wedge body 15 of an appropriate length inclined at an angle of about 60 degrees is projected, and a wedge groove (key groove) 16 slidably engaged with the wedge body 15 is the same as the wedge body 15. The operating rod 17 provided inside at an inclination angle is inserted inside the inflow pipe 3 of the valve casing 7 in a direction orthogonal to the inflow pipe 3 and the pipe body 12,
The wedge groove 16 and the wedge body 15 are engaged with each other. Therefore, when the operating rod 17 is moved up and down in the vertical direction as shown in FIGS. 2 to 5, the tubular body 12 moves to the left and right in the respective figures due to the engagement relationship between the wedge body 15 and the wedge groove 16. It is configured to slide the valve seat 11 into and out of contact with the outer peripheral wall of the valve body 10 by sliding on and off. This is performed by manual means, and in the figure, 18 indicates a holding member for positioning the operating rod 17.

In the above structure, the outflow pipe 5 is now connected to the inflow pipe 3 side.
When, for example, the powder having a high temperature is pumped to the side, as shown in FIG. By retreating, the valve seat 11 is slightly separated from the valve body 10, and the valve body 10 in the closed state is rotated 90 degrees to position the flow path 8 in the same direction as the pipe body 12, and then, as shown in FIG. As shown in, by pushing the operating rod 17 and advancing the tube body 12 toward the valve body 10, the valve seat 11 is brought into close contact with the outer peripheral wall of the valve body 10,
The valve body 10 is communicated with the pipe body 11, and the powder is pumped to the outflow pipe 5 side only through the flow passage 8 of the valve body.

Also, when closing the valve body 10, as shown in FIG. 5, the valve seat 11 is slightly separated from the valve body 10 by retracting the tube body 12 through the same procedure as described above, so that The valve body 10 in the communicating state is rotated by 90 degrees so that the closing wall 9 faces the valve seat 11 as shown in FIG. 3, and then the operating rod 17 is pushed down to move the pipe body 12 into the valve body 10. By advancing toward, the valve seat 11 is brought into close contact with the closing wall 9 of the valve body 10 to completely close and block the flow path of the powder.

(Advantages of the Invention) The present invention relates to a valve main body having a fluid passage and a closing wall rotatably mounted in a valve casing having a fluid inlet and an outlet, and a fluid flow in the valve casing. A pipe body having a valve seat at the inner end slidably installed on the inlet side, and a wedge body is provided on the outer peripheral side of the pipe body obliquely with respect to the pipe axis, and An operating rod having an engaged wedge groove is provided, and by moving the operating rod forward and backward, the tubular body is advanced and retracted through the wedge body and the wedge groove, and its valve seat is brought into contact with and separated from the outer peripheral wall of the valve body. In addition, according to the valve device, which is characterized in that the valve chamber and the outlet can always be communicated with each other without providing a tube body having a valve seat on the fluid outlet side of the valve casing, the valve device is operated as described above. Since the flow path of the fluid is opened and closed by the above, the following various effects that cannot be achieved by the valve device of this type described above can be obtained.

(1) By a simple operation of linearly advancing and retracting the operating rod, the tubular body provided with the valve seat is advanced and retracted through the wedge mechanism composed of the engagement relationship between the wedge body and the wedge groove, and the valve seat is valved. Since the fluid flow path can be opened and closed surely by being brought into and out of contact with the main body, there is an advantage that its operation and structure are extremely easy and simple and can be provided at low cost, and it also adversely affects the operation of the operating rod when transferring high temperature fluid. And therefore does not have to complicate the structure.

(2) Since the valve body can be rotated under the condition that a gap is formed between the valve seat and the valve body of the pipe body, the valve body can be rotated without sliding on the valve seat, The passage of the valve body can be opened and closed smoothly.

(3) Further, due to the existence of the gap, powder is less likely to adhere to the valve seat when the opening and closing of the flow path of the valve body is changed during the transfer of powder fluid having a high temperature. Also, since the gap can be adjusted, the rotation of the valve body is not hindered.

(4) Since the tubular body having the valve seat is provided only on the fluid inlet side of the valve casing and is not provided on the outlet side, the valve chamber and the outlet are always in communication with each other. Even if a part of the powder falls in the valve chamber during fluid transfer, it can be guided and guided to the outlet side reliably to prevent the accumulated powder from accumulating. There will be no trouble due to accumulation.

(5) A wedge mechanism including a wedge body for advancing and retracting a tubular body having a valve seat and an operating rod having a wedge groove engaged with the wedge body is provided only on the tubular body side, and Since the cover is not provided over the cover side, the cover can be attached and detached very easily. Therefore, the maintenance and inspection of the valve body can be easily performed by a simple operation of removing the cover without removing the valve body.

[Brief description of drawings]

The drawings show an embodiment of the present invention, in which FIG. 1 is a vertical cross-sectional side view of the valve body with the flow passage opened, and FIG. 2 is a partially cutaway plan view of the valve body with the flow passage closed. Fig. 3 ~
FIG. 5 is an operation explanatory view of a main part for rotating the valve body to open and close the flow path thereof, and FIG. 6 is a perspective view of a pipe body having a valve seat. (Explanation of symbols) 1 ... Valve device, 10 ... Valve main body, 2 ... Inflow port, 11 ... Valve seat, 4 ... Outflow port, 12 ... Tube, 6 ... Valve chamber, 7 ... Valve housing, 15 ... wedge body, 8 ... flow path, 16 ... wedge groove, 9 ... blocking wall, 17 ... operating rod.

Claims (1)

[Scope of utility model registration request] 1. A valve main body having a fluid passage and a blocking wall rotatably mounted in a valve casing having a fluid inlet and an outlet, and a valve main body sliding on the fluid inlet side of the valve casing. And a tube body having a valve seat at an inner end movably mounted therein. A wedge body is obliquely provided on the outer peripheral side of the tube body with respect to the pipe axis and engaged with the wedge body. An operating rod having a wedge groove is provided, and by moving the operating rod forward and backward, the tube body is advanced and retracted through the wedge body and the wedge groove so that the valve seat is brought into contact with and separated from the outer peripheral wall of the valve body. A valve device characterized in that a valve body is not provided on a fluid outlet side of a casing and a valve chamber and an outlet are always communicable with each other.