JPH058141U - Valve seat for container bottom discharge valve - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a valve seat for a container bottom discharge valve that does not cause leakage of liquid in a container. [Structure] Center axis X of vertical discharge valve port 2 of container bottom 1
Attach the valve body 3 of the discharge valve with the axes aligned with
The valve body 3 is formed with a discharge port 9 obliquely downward and a valve seat 15 is inserted between the container bottom 1 and the valve body 3 for sealing, and a valve rod 11 that moves up and down through the valve body 3 The structure of the above-mentioned valve seat 15 for use in a container having a structure for opening and closing the container bottom discharge valve port 2 by means of the core seat 14 of SUS304.
Has been inserted.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improved structure of a valve seat of a discharge valve provided at the bottom of a container in order to discharge products in a corrosion-resistant reaction container used in the fields of chemical industry, food industry, etc. quickly and without leakage.

[0002]

[Prior Art]

 FIG. 4 is a view showing an example of a conventional opening / closing device for this kind of container bottom discharge valve.

In FIG. 4, with respect to the discharge valve port 2 of the container bottom 1, the valve body 3 together with the valve seat 4 and the packing 5 and the Teflon sheet 6 are interposed in such a direction as to match the axis with the central axis X. After sealing, the valve body 3 and the container bottom 1 are connected by the split flange 7 and the bolt 8. The valve body 3 is formed with a discharge guide port 9 that extends obliquely downward. A valve rod 11 having a valve head 10 seated on a valve seat 4 formed at the top penetrates through the valve body 3, is sealed by a square packing device 12 at the lower portion of the valve body 3, and is vertically moved by a handle 13. . In a normal operating state, the valve head 10 is pressed against the valve seat 4 by the pressure in the container to be closed, and when the valve is opened, the valve stem 11 is pushed up by the handle 13 to open the valve head 10 and the valve seat 4. The product in the container is discharged from the discharge port 9 by forming a gap therebetween.

[0004]

[Problems to be solved by the device]

 Conventionally, synthetic resin such as PTFE (polytetrafluoroethylene) resin has been generally used as the material of the valve seat 4 in consideration of corrosion resistance, and the container, the valve rod 11 and the valve body 3 have a certain strength. Stainless steel or glass-lined steel was used to provide corrosion resistance.

However, since the inside of the container is often operated at a considerably high temperature (about 150 to 200 ° C.), the Teflon-made valve seat 4 is easily softened and deformed, and when the valve is opened and closed. Since the valve stem 11 moves up and down and the valve head 10 comes into pressure contact with the valve seat 4, the valve seat 4 is likely to be deformed due to long-term use, which may cause leakage of liquid in the vessel.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a valve seat for a container bottom discharge valve in which liquid in a container does not leak. There is something to do.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the gist of the present invention is to attach the valve body of the discharge valve with its axis aligned with the central axis of the vertical discharge valve opening at the bottom of the container, and to the valve body, the discharge guide port is located diagonally downward. A valve seat is inserted between the bottom of the container and the valve body to seal it, and it is used for a container with a structure in which the container bottom discharge valve port is opened and closed by a valve rod that goes up and down through the valve body. In the above-mentioned valve seat structure, a metal core body is inserted in the valve seat.

The material of the core body inserted in the valve seat can be selected according to the usage conditions, and for example, general carbon steel can also be used. And, under the condition that the requirements of heat resistance and corrosion resistance are more severe, it is preferable to use stainless steel.

[0009]

[Action]

 In the above configuration, during normal operation, the valve stem is pulled down, the valve head is pressed against the valve seat, and the valve is closed. Then, when discharging the liquid in the vessel, operate the handle to raise the valve rod. Since a metal core is inserted in this valve seat, it does not easily deform even if the temperature of the liquid in the vessel is high, and it is repeatedly pressed by the valve head as the valve rod moves up and down to open and close the valve. Even if the valve is damaged, the valve seat is unlikely to be deformed and liquid leakage is unlikely to occur.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to FIG.

The basic structure of FIG. 1 is the same as that of FIG. 4 except that a valve seat 15 made of Teflon in which a core body 14 of SUS304 is inserted is used. The valve body 3 is sealed together with the valve seat 15 with the packing 5 and the Teflon sheet 6 in a direction in which the axis coincides with the center axis X, and the valve body 3 and the container bottom are closed by the split flange 7 and the bolt 8. It is a combination of 1 and 1. The structures of the discharge guide 9, the valve head 10, the valve rod 11, the corner packing device 12, the handle 13 and the like are the same as in FIG.

In such a structure, even if the liquid temperature in the container is high, the Teflon valve seat 15 has the SUS core body 14 inserted therein, so that it is difficult to deform, and the valve rod 11 is opened and closed for opening and closing the valve. Even if the valve seat 15 is moved up and down and repeatedly pressed by the valve head 10, the valve seat 15 is not easily deformed. Further, since the core body is made of SUS, it exhibits excellent corrosion resistance.

2 and 3 are sectional views showing another embodiment of the valve seat of the present invention. FIG. 2 shows a valve seat 16 in which a core 17 having an L-shaped cross section is embedded. Reference numeral 3 shows a valve seat 18 in which a core 19 is embedded. In this case, since the core body is buried in the valve seat, for example, a core body made of general carbon steel such as S45C can be used.

[0014]

[Effect of the device]

 The valve seat according to the present invention is less likely to be softened and deformed even when the temperature inside the container is high, and is not easily deformed even when repeatedly pressed by the valve head, so that liquid leakage does not easily occur.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an example of a container bottom discharge valve opening / closing device including a valve seat of the present invention.

FIG. 2 is a vertical cross-sectional view showing another embodiment of the valve seat of the present invention.

FIG. 3 is a vertical sectional view showing still another embodiment of the valve seat of the present invention.

FIG. 4 is a vertical sectional view showing an example of a container bottom discharge valve opening / closing device having a conventional valve seat.

[Explanation of symbols]

 1 ... Container bottom 2 ... Discharge valve port 3 ... Valve body 9 ... Discharge guide port 11 ... Valve rod 14, 17, 19 ... Core body 15, 16, 18 ... Valve seat X ... Central axis

Claims (1)

[Claims for utility model registration] [Claim 1] The valve body of the discharge valve is attached with its axis aligned with the central axis of the vertical discharge valve port at the bottom of the container, and the discharge port is obliquely downward to the valve body. And a container having a structure in which a valve seat is inserted between the container bottom and the valve body for sealing, and the container bottom discharge valve port is opened and closed by a valve rod that goes up and down through the valve body. A valve seat for a container bottom discharge valve having a structure of a valve seat, wherein a metal core is inserted into the valve seat.