JPH0684086U - Particle removal device for valve device - Google Patents

Abstract

(57) [Summary] [Purpose] It is possible to reliably close the valve body, and prevent the granular material from adhering to and growing on the valve body, which causes the valve seat to wear. The purpose is to be able to prolong its life without. [Structure] A valve seat 5 of a valve casing 1 is provided with a main body 21 to be attached to a valve device provided with a valve body 15 that can be opened and closed.
A nozzle portion 21 for ejecting a fluid to the valve body 15 and an introduction passage 28 communicating with the nozzle portion and introducing the fluid into the nozzle portion are formed in the valve 21.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 INDUSTRIAL APPLICABILITY The present invention is for a valve device in which a valve body is attached to a valve device configured to perform a valve opening / closing operation with respect to a valve seat, and powder particles adhering to the valve body and the valve seat can be removed. The present invention relates to a particulate matter removing device.

[0002]

[Prior art]

 Conventionally, for example, various valves such as a butterfly valve and a slide gate valve have been used as a valve device used when cutting powder particles such as cement, chemicals, various metal powders, etc. from a feeder. The powder or granular material can be taken out by a predetermined amount by bringing it into or out of contact with a valve seat formed in the valve casing.

[0003]

[Problems to be solved by the device]

 However, when the valve device having the above-mentioned configuration is used for a long period of time, powder particles are clogged between the valve body and the valve seat, resulting in an incompletely closed state, causing the powder particles to leak, or the powder particles on the valve body. There is a drawback that the life of the valve seat is shortened because the powder particles that adhere and grow on the body wear the valve seat.

The present invention has been made in view of the conventional problems as described above, and it is possible to surely close the valve body, and at the same time, to prevent powder particles from adhering to and growing on the valve body. An object of the present invention is to prevent the valve seat from being worn by the powder and granular material and to extend the life of the valve seat.

[0005]

[Means for Solving the Problems]

 The technical means taken by the present invention to solve the above-mentioned problems includes a main body 21 attached to a valve device having a valve body 15 openably and closably mounted on a valve seat 5 of a valve casing 1. A nozzle part for ejecting a fluid to the valve body 15 and an introduction path 28 communicating with the nozzle part and introducing the fluid into the nozzle part are formed.

[0006]

[Action]

 In the valve device of the present invention, when powder particles adhere to the valve body 15, the fluid introduced into the nozzle portion through the introduction passage 28 is ejected from the nozzle portion to the valve body 15 and is ejected. The fluid removes the powder particles attached to the valve body 15.

Therefore, the granular material does not adhere to or grow on the valve body 15, and there is no risk that the granular material adhered to the valve body 15 will wear the valve seat 5 when the valve body 15 is opened or closed. In addition, the valve body 15 can be brought into close contact with the valve seat 5 without fail, and it is possible to prevent the powder or granular material from leaking.

[0008]

【Example】

 Hereinafter, an example in which the present invention is applied to a butterfly valve device for powder and granules will be described with reference to the drawings. 1 to 3, reference numeral 1 is a valve casing having a circular opening 3 for passage of fluid of the granular material, and the valve casing 1 is mounted below a feeder 4 in which the granular material is accommodated. ing.

Reference numeral 5 denotes a valve seat forming the opening 3 of the valve casing 1. The valve seat 5 has a seal ring 7 having both heat resistance and elasticity, and the seal ring 7 is attached to a bolt 9. And a ring body 8 which is fastened and fixed.

Reference numeral 11 denotes a valve shaft having one end protruding outward from the valve casing 1 through a gland seal 13 on one side wall surface of the valve casing 1. The valve shaft 11 is a spherical surface fitted to the gland seal 13. The spherical bulging portion 12 is provided, and the spherical bulging portion 12 can swing and rotate about the fulcrum.

Reference numeral 15 is a valve body for opening and closing the opening 3 of the valve casing 1, and a seal portion 16 which is crimped to the seal ring 7 is attached. Further, a leg portion 17 is projectingly provided on the valve body 15, and one end portion of the valve shaft 11 is inserted and fixed to the leg portion 17. An actuator 19 is connected to the other end of the valve shaft 11 and swings and rotates the valve shaft 11 with the spherical bulging portion 12 as a fulcrum.

Reference numeral 20 denotes a powdery or granular material removing device which is interposed between the valve casing 1 and the feeder 4 as shown in FIG. 1 and removes the powdery or granular material adhering to the valve body 15 and the seal ring 7. The particulate matter removing device 20 includes a device body 21 having a circular ring shape along the opening 3, and a bottom surface 21a of the device body 21 is provided with an O-ring 23 at an opening edge 1a on the upper surface of the valve casing 1. It is fixed airtightly.

Reference numeral 25 denotes an air supply groove that opens on the lower surface side of the apparatus body 21, and the air supply groove 25 is formed in a ring shape around the entire circumference of the apparatus body 21 as shown in FIG. The inner peripheral wall 21a of the device main body 21 is extended downward so as to form a ring-shaped gap 27 between the inner peripheral wall 21a and the opening peripheral surface 1b of the valve casing 1. It functions as a nozzle port that ejects air to the part. Incidentally, the nozzle portion is constituted by the inner peripheral wall 21a of the apparatus main body 21 which constitutes the air supply groove 25.

Reference numeral 28 is an air introduction path formed in the apparatus main body 21 so as to communicate with the air supply groove 25, and can be connected to an air supply apparatus (not shown). The opening edge 1a of the valve casing 1 in which the device body 21 is located is formed slightly lower than the other upper surface, and the lower portion 29 of the device body 21 should be brought into contact with the step portion 30 of the device body 21. With this, the device main body 21 can be positioned.

Reference numeral 31 denotes a flange formed in the lower portion of the feeder 4, and a mounting flange 32 is provided on the flange 31 so as to project radially outward, and a bolt insertion hole 34 formed in the mounting flange 32. By screwing the bolt 35 inserted into the valve casing 1 into the valve casing 1, the main body 21 of the apparatus can be detachably attached to the valve casing 1 by the flange 31.

The present embodiment has the above configuration, and an example of its use will be described next. First, as shown in FIG. 1, when the valve body 15 is in the closed state, the valve body 15 is pressed by the seal ring 7 to close the opening 3 and the flow of the powder or granules in the feeder 4 is shut off.

Next, when discharging the granular material from the feeder 4, when the other end side of the valve shaft 11 is lifted by the operation of the actuator 19, the valve shaft 11 becomes a spherical bulging portion 12. The valve body 15 descends from the opening 3 because it oscillates about the fulcrum, then the valve body 15 rotates 90 ° in the vertical direction without opening any sliding contact with the valve seat 5 side to open the opening 3. However, it becomes possible to distribute the powder and granules.

Further, when powder particles adhere to the outer peripheral portion of the valve body 15 and the seal ring 7, air is supplied from the air introduction passage 28 to the air supply groove 25, and air is ejected from the gap 27. As a result, it is possible to remove the powder particles attached to the valve body 15 or the like. Therefore, it is possible to prevent the powder particles from adhering to the valve body 15 and the seal ring 7, and to prevent the powder particles from being caught between the valve body 15 and the seal ring 7, so that the valve body 15 is reliably closed. Will be things.

FIG. 4 shows another embodiment of the present invention. In the above embodiment, a gap 27 as a nozzle port is formed between the valve casing 1 and the inner peripheral wall 21a of the main body 21 of the apparatus. A nozzle opening 38 having a gap 27 is fixed to the apparatus main body 21. The device body 21 may be positioned with respect to the valve casing 1 by engaging the nozzle opening 38 with the step portion 39 formed in the device body 21.

Further, the device main body 21 does not necessarily have to be formed in a ring shape, and for example, a plurality of device main bodies 21 may be provided at intervals in the circumferential direction of the valve body 15. Further, the fluid ejected from the powder and granular material removing device 20 for a valve device may be a liquid such as water in addition to gas. In addition, the present invention includes all specific configurations of each part as intended by the present invention. The design can be freely changed within the range.

[0021]

[Effect of device]

 As described above, the valve device of the present invention is provided with the main body attached to the valve device in which the valve body is openably and closably mounted on the valve seat of the valve casing, and the main body has a body for ejecting fluid to the valve body. Since the nozzle portion and the introduction path that communicates with the nozzle portion and introduces the fluid into the nozzle portion are formed, it is possible to prevent the powder particles from adhering to the valve body. Therefore, there is no risk that the powder and granules adhering to the valve body will grow and wear the valve seat, and there is the advantage that the life of the valve seat can be extended, and the powder and granules will get caught between the valve body and the valve seat. It is possible to reliably seal the valve body without the risk of being inserted.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an embodiment of the present invention.

FIG. 2 is a bottom view of the same.

3A is a sectional front view showing the whole, and FIG. 3B is a sectional side view showing the whole.

FIG. 4 is a sectional view of a main part showing another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Valve casing, 5 ... Valve seat, 15 ... Valve body, 21 ... Device main body (main body), 28 ... Fluid introduction part

Claims (1)

[Scope of utility model registration request] 1. A valve seat (5) of a valve casing (1) is provided with a main body (21) attached to a valve device provided with a valve body (15) which can be opened and closed. A powder for a valve device, characterized in that a nozzle portion for ejecting a fluid to the valve body (15) and an introduction path (28) communicating with the nozzle portion and introducing the fluid into the nozzle portion are formed. Grain removal device.