JP4918649B2 - Foreign matter prevention jig for tank drain - Google Patents

Description

  The present invention relates to a liquid waste treatment tank used in a plant such as a power substation, a tank drain that prevents foreign matters such as bolts, nuts, and screws from entering a discharge port of a waste liquid inlet / outlet pipe at the bottom of a processing device, etc. The present invention relates to a foreign matter contamination prevention jig.

  In order to prevent foreign matter such as bolts, nuts, and screws that fall during work from entering the waste liquid inlet / outlet piping at the bottom of liquid waste processing tanks and processing equipment used in plants such as substations and substations A foreign matter mixing prevention jig is used. For example, as shown in the cross-sectional view of FIG. 7, the discharge port 53 of the waste liquid inlet / outlet pipe 52 from the upper part of the tank 51 may be hidden behind the device 54 and cannot be visually recognized. In such a state, an operation string is connected to the conventional foreign matter mixing preventing device 55 with a mesh, and the attachment is carefully performed so as to match the discharge port 53 of the waste liquid inlet / outlet pipe 52 from the upper part of the tank 51.

  As shown in the plan view and the side view of FIGS. 8 and 9, the foreign matter mixing prevention tool 55 with mesh sandwiches a mesh plate 57 that prevents passage of foreign matter between a circular frame 56. A retaining hole 58 for connecting an operation string is provided in a part of the frame 56. As shown in the explanatory view of FIG. 10, conventionally, such a meshed foreign matter mixing prevention tool 55 is slipped down to the discharge port 53 at the center of the substantially bowl-shaped bottom 51 a of the tank 51 by its own weight, and this mesh The center of the attached foreign matter mixing prevention tool 55 and the center of the discharge port 53 are aligned.

With regard to the technology for preventing fallen objects such as foreign matter from flowing into such a drain port, as shown in, for example, Japanese Utility Model Laid-Open No. 7-10072 “Drain Port Cover” in Patent Document 1, the inner diameter is larger than the diameter of the drain port. A net-like cap that protrudes in a hemispherical shape from the inner periphery of the outer periphery is provided, and a plurality of protruding pieces are provided at intervals on the entire lower surface of the lower surface of the periphery. A suction plate that protrudes downward at an even interval is provided, and the protruding piece has a protruding height that makes the protruding piece abut against the suction surface when the suction plate is pressed against the suction surface. A drain outlet cover has been proposed.
Japanese Unexamined Patent Publication No. 8-68398

  However, as described above, the conventional meshed foreign matter mixing preventing device 55 is easy to stop in the middle of the substantially bowl-shaped bottom 51a of the tank 51 and moves to the center of the discharge port 53, as shown in the explanatory view of FIG. It had the problem that it was very difficult to do. Since the discharge port 53 is hidden behind the device 54 and cannot be visually recognized from the upper part of the tank 51, it is impossible to confirm whether or not the discharge port 53 can be mounted at an appropriate position from above.

  Therefore, there is a problem that it takes a long time to attach the conventional foreign matter mixing prevention tool 55 with a mesh to an appropriate position of the discharge port 53.

  The present invention has been developed to solve such problems. That is, an object of the present invention is to change the shape of the foreign matter mixing prevention jig from a plate shape to a spherical shape, so that it can be easily mounted at an appropriate position of the discharge port of the tank, and the mounting can be performed in a short time. An object of the present invention is to provide a foreign matter mixing prevention jig for a tank drain that can be completed.

According to the present invention, at the bottom (51a) of the tank (51), the tank drain (51) is moved so as to roll under its own weight, and the foreign matter is prevented from being mixed into the tank drain that is mounted so as to drop into the discharge port (53) of the tank (51). A jig body (2) having an outer diameter (d1) longer than the diameter (d2) of the discharge port (53) of the tank (51) and having a hollow, substantially spherical shape, and the jig A water passage hole (3) opened at several locations on the main body (2) and having a diameter that allows liquid to pass but prevents passage of foreign matter, and an operation string (4) attached to the jig main body (2). And a foreign matter mixing prevention jig for a tank drain opening characterized by comprising:
The jig body (2) is preferably manufactured from a metal member.
The surface of the metal jig body (2) is preferably covered with an elastic coating material (12) such as rubber or synthetic resin.

  In addition, a mesh material (22) having a large number of gaps that allows liquid to pass but prevents the passage of foreign substances has an outer diameter (d1) longer than the diameter (d2) of the discharge port (53) of the tank (51). ) And a jig body (2) formed in a substantially spherical shape, and an operation string (4) attached to the jig body (2).

  In the above configuration, the jig body (2) connected to the tip of the operation string (4) is dropped on the bottom (51a) of the tank (51), and is moved by its own weight at the bottom (51a) of the substantially bowl shape. Attach to drop into the outlet (53). Since this jig body (2) is a substantially spherical body, it is easy to roll and can be easily fitted into the circular discharge port (53) so that it can be mounted in a short time.

  Since this jig body (2) has a large number of water holes (3), the waste water can be passed through the pipe, but foreign matter mixed in the waste water must be prevented from passing therethrough. Can do. Similarly, it is possible to prevent bolts, nuts, and screws that have dropped during work from flowing into the waste liquid inlet / outlet pipe (52).

  On the other hand, since the jig body (2) is only fitted into the circular discharge port (53), the jig body (2) is pulled by pulling the operation string (4) attached to the jig body (2). ) Can be easily removed.

  By covering the surface of the metal jig body (2) with an elastic coating material (12) such as rubber or synthetic resin, the adhesion to the discharge port (53) of the jig body (2) is improved. The jig body (2) cannot be easily detached from the discharge port (53).

  The foreign matter mixing prevention jig of the drain port of the present invention has an outer diameter longer than the diameter of the drain port of the tank so that a hollow, substantially spherical jig body rolls at its bottom at its own weight. It is moved and mounted so as to drop into the drain of the tank.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view showing a foreign matter mixing prevention jig for a tank drain according to a first embodiment. FIG. 2 is an enlarged cross-sectional view of the jig body. FIG. 3 is a cross-sectional view of a tank using the foreign matter mixing prevention jig according to the first embodiment. FIG. 4 is an explanatory diagram of a state in which the foreign matter mixing prevention jig according to the first embodiment is rolled at the tank bottom.
The foreign matter mixing prevention jig 1 according to the first embodiment includes a hollow, substantially spherical jig body 2 that allows liquid to pass through the jig body 2 but prevents passage of foreign matters such as bolts, nuts, and screws. The water holes 3 are opened at several places to prevent foreign matters from flowing into the waste liquid inlet / outlet pipe 52. An operation string 4 is attached to the jig body 2 and is attached to the discharge port 53 while being suspended by the operation string 4.

  The jig body 2 has a substantially spherical shape made of metal such as iron. As shown in FIG. 4, the jig body 2 has an outer diameter d 1 longer than the diameter d 2 of the drain port 53 of the tank 51. Of course, this is to prevent the jig body 2 of the present invention from falling into the discharge port 53. In a state where the jig body 2 of the present invention is mounted on the discharge port 53, the diameter of the sphere can be fitted so that about 1/4 to 1/3 sinks in the discharge port 53. This is because if the jig body 2 of the present invention is mounted to the discharge port 53 at such a depth, the jig body 2 cannot be detached from the discharge port 53 due to the flow of waste liquid. On the contrary, if the jig body 2 is submerged in the discharge port 53 deeper than this, the jig body 2 will not easily come off the discharge port 53.

  In the wall surface of the jig body 2, a large number of water passage holes 3 that allow liquid to pass but prevent passage of foreign substances are opened. This corresponds to a conventional mesh. The inner diameter of the water passage hole 3 is, for example, about 2-3 mm to 10 mm. Its dimensions are determined according to the state of the waste liquid. If the viscosity is high, increase the inner diameter to make it easier to pass. On the contrary, the inner diameter can be reduced when the viscosity is low and smooth.

  An operation string 4 is attached to a part of the jig body 2. The operation string 4 is preferably used when the jig body 2 of the present invention is dropped into the tank 51 or removed, and the connecting tool 5 between the jig body 2 and the operation string 4 is easy to rotate. This is because the jig body 2 of the present invention is easy to roll by its own weight at the bottom 51a of the bowl-shaped tank 51.

  As shown in FIGS. 3 and 4, the foreign matter mixing prevention jig 1 described above drops the jig body 2 connected to the tip of the operation string 4 to the bottom 51 a of the tank 51, and in this substantially bowl-shaped bottom 51 a, It moves so that it rolls with its own weight, and it mounts | wears so that it may drop into the discharge port 53. Since this jig main body 2 is a substantially spherical body, it can be fitted into the circular discharge port 53 so as to be easily dropped, so that it can be mounted in a short time.

  Since the jig main body 2 has a large number of water passage holes 3, the waste water can be passed through the waste liquid inlet / outlet pipe 52, but foreign matter mixed in the waste water can be prevented from passing therethrough. it can. Similarly, bolts, nuts and screws dropped during the operation can be prevented from flowing into the waste liquid inlet / outlet pipe 52.

  On the other hand, since the jig body 2 only fits into the circular discharge port 53, the jig body 2 can be easily detached from the discharge port 53 by pulling the operation string 4 attached to the jig body 2. Can do. Thereby, the foreign material clogged in the jig body 2 can be removed.

FIG. 5 is a cross-sectional view of a foreign matter mixing prevention jig coated with the coating material of Example 2.
In the foreign matter mixing prevention jig 11 of Example 2, the surface of the metal jig main body 2 was coated with a coating material 12 having elasticity such as rubber or synthetic resin. By covering the surface of the metal jig body 2 with the coating material 12 in this way, the adhesion with the discharge port 53 of the jig body 2 is increased, and even if there is a strong flow of waste liquid or the like, The jig body 2 cannot be easily detached from the discharge port 53. In addition, it is necessary to coat a material with good corrosion resistance according to the type of waste liquid or the like. The usage method of attaching and detaching the discharge port 53 of the third embodiment is the same as that of the foreign matter mixing prevention jig 1 of the first embodiment.

FIG. 6 is a front view of a foreign matter mixing prevention jig made of the mesh material of the third embodiment.
In the foreign matter mixing prevention jig 21 of the third embodiment, a mesh material 22 having a large number of gaps that allows the liquid to pass therethrough but prevents the passage of foreign matters is used instead of the water passage hole 3 of the first embodiment. Even the mesh material 22 is formed in a substantially spherical shape so that its outer diameter d1 is longer than the diameter d2 of the discharge port 53 of the tank 51. An operation string 4 was also attached to the jig body 2. The usage method of the third embodiment is also the same as that of the foreign matter mixing prevention jig 1 of the first embodiment.

  In the present invention, by changing the shape of the foreign matter mixing prevention jigs 1, 11, 21 from a plate shape to a spherical shape, the jig can be easily mounted at an appropriate position of the discharge port 53 of the tank 51, and Of course, as long as the mounting can be completed in a short time, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.

  The foreign matter mixing prevention jig of the present invention can be used as a discharge port of a waste liquid inlet / outlet pipe at the bottom of a liquid waste processing tank, a processing device or the like used in a plant such as a power generation substation.

It is a front view which shows the foreign material mixing prevention jig | tool of the tank drain port of Example 1. FIG. It is an expanded sectional view of a jig main part. It is sectional drawing of the tank using the foreign material mixing prevention jig | tool of Example 1. FIG. It is explanatory drawing of the state which is rolling the tank bottom part of the foreign material mixing prevention jig | tool of Example 1. FIG. It is sectional drawing of the foreign material mixing prevention jig | tool which coat | covered the coating material of Example 2. FIG. 6 is a front view of a foreign matter mixing prevention jig made of a mesh material of Example 3. FIG. It is sectional drawing of the tank using a foreign material mixing prevention jig | tool. It is a top view of the conventional foreign material mixing prevention tool with a mesh. It is a side view of the conventional foreign material mixing prevention tool with a mesh. It is explanatory drawing of the state which is rolling the conventional foreign material mixing prevention jig | tool at the tank bottom part. It is explanatory drawing of the state which has not been equipped with the conventional foreign material mixing prevention jig | tool at the appropriate position of a tank bottom part.

Explanation of symbols

1 Foreign matter prevention jig (Example 1)
2 Jig body 3 Water passage hole 4 Operation string 5 Connecting tool 11 Foreign matter mixing prevention jig (Example 2)
12 Coating material 21 Foreign matter mixing prevention jig (Example 3)
51 Tank 51a Tank bottom 53 Discharge port d1 Outer diameter of jig body d2 Diameter of discharge port

Claims (4)

A foreign matter mixing prevention jig for a tank drain port, which is mounted so as to move by rolling under its own weight at the bottom (51a) of the tank (51) and to be dropped into the discharge port (53) of the tank (51),
A hollow substantially spherical jig body (2) having an outer diameter (d1) longer than the diameter (d2) of the discharge port (53) of the tank (51);
A water passage hole (3) opened in several places of the jig body (2) and having a diameter that allows liquid to pass but prevents passage of foreign matter;
An operation string (4) attached to the jig body (2), and a foreign matter mixing prevention jig for a tank drain. 2. The jig for preventing contamination of a tank drain according to claim 1, wherein the jig body (2) is a metal member. The jig for preventing contamination of foreign matter in a tank drain according to claim 2, wherein the surface of the metal jig body (2) is coated with an elastic coating material (12) such as rubber or synthetic resin. A tank (51) bottom (51a) is moved by its own weight so as to roll, and is attached to the tank (51) so as to drop into a discharge port (53).
A mesh material (22) having a large number of gaps that allows liquid to pass but prevents the passage of foreign substances has an outer diameter (d1) longer than the diameter (d2) of the discharge port (53) of the tank (51). A jig body (2) formed in a substantially spherical shape to have,
An operation string (4) attached to the jig body (2), and a foreign matter mixing prevention jig for a tank drain.

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