JP4649450B2 - Chemical injection device - Google Patents

Description

In the present invention, the chemical liquid injection path is provided so as to be connectable to the fluid transport pipe so that the tip thereof enters the fluid transport pipe from the pipe radial direction, and the chemical liquid supply pipe is connected to the chemical liquid injection path. A supply pipe connection path that can be connected in communication, a scraper that can scrape off deposits adhering to the peripheral surface by movement along the longitudinal direction of the chemical liquid injection path in the chemical liquid injection path, and the scraper It is related with the chemical | medical solution injection | pouring apparatus provided with the scraping tool insertion path which can be penetrated so that movement operation is possible from the outer side of the said pipe | tube for fluid conveyance .

The above chemical injection device is used for pipe fluids such as pool water, air conditioning water, cooling water, boiler water, seawater, etc. flowing in the fluid transportation pipes, bactericides, anticorrosives, oxygen scavengers, algae inhibitors, etc. It is used to inject the chemical liquid, and the chemical liquid injection path is provided so that it can be connected so that its tip enters the pipe for transporting fluid from the pipe diameter direction, and the chemical liquid and the fluid in the pipe react to generate If the product deposits in the chemical solution injection path and adheres to the peripheral surface, it will interfere with the injection of the chemical solution, so that the deposits can be removed and moved along the longitudinal direction of the chemical solution injection path. In order to scrape off the adhering material as needed without removing the chemical injection path from the fluid transport pipe, a scraper that can scrape off the adhering material adhering to the peripheral surface is provided. taken tool from the outside of the fluid transport pipe Freely moving operation is provided with a scraping instrument insertion channel that can be inserted.
Conventionally, in the above-described chemical solution injection device, switching that can be selectively switched between a first state in which the chemical solution injection path communicates with the supply pipe connection path and a second state in which the chemical solution injection path communicates with the scraper insertion passage is possible. When the chemical liquid is injected into the fluid in the pipe, the switching means is switched to the first state, and the scraping means attached to the peripheral surface of the chemical liquid injection path is scraped. By performing the switching operation to the second state, the scraper inserted through the scraper insertion path can be made to enter the chemical solution injection path (see, for example, Patent Document 1).

JP 2005-238020 A

For this reason, when the chemical solution is being injected into the in-pipe fluid, if the switching means is not operated to be switched to the second state, the adhering material adhering to the peripheral surface of the chemical solution injection path can be scraped off with the scraper. Therefore, after scraping off the adhering matter adhering to the peripheral surface of the chemical solution injection path, the chemical solution cannot be injected into the in-pipe fluid unless the switching means is switched to the first state. There is a disadvantage that it is not easy to use.
The present invention has been made in view of the above circumstances, and even when the chemical liquid is injected into the in-pipe fluid, the adhering material adhering to the peripheral surface of the chemical liquid injection path is not particularly operated without operating the switching means. An object of the present invention is to make it possible to inject a chemical into the in-pipe fluid without any particular operation of the switching means even after the deposits can be scraped off by the scraper.

In the first characteristic configuration of the present invention, the chemical liquid injection path is provided so as to be connectable to the fluid transport pipe so that the tip thereof enters the fluid transport pipe from the pipe diameter direction, and the chemical liquid supply pipe is connected to the chemical liquid supply pipe. A supply pipe connection path that can communicate with the injection path, and a scraper that can scrape off deposits adhering to the peripheral surface by movement along the longitudinal direction of the chemical injection path in the chemical injection path; A chemical liquid injector provided with a scraper insertion passage through which the scraper is movably inserted from the outside of the fluid transport pipe ,
In the rotating operation of a rotary axis around an axis coaxial with the liquid injection passage, and a state in which said liquid injection passage and the supply pipe connection path are communicated, and the chemical injection channel and the supply tube connecting passage The scraper is provided at a position at which the valve body is sandwiched between the chemical solution injection path and a switching means provided with a valve body that can be switched from the outside of the fluid transport pipe in a state where communication is cut off. An insertion passage is provided concentrically with the axis of the chemical solution injection path, and a through-hole through which the scraper can be inserted between the scraper insertion path and the chemical solution injection path is formed in the valve body. A seal portion is provided which is formed concentrically with the rotary shaft core and closes a gap between the scraper and the peripheral surface of the scraper insertion passage.

[Action and effect]
In the rotating operation of a rotary axis around an axis coaxial with the liquid injection passage, state and liquid injection passage and the supply pipe connection path to block a state that communicates, the communication between the liquid injection passage and the supply pipe connection path In addition, since a switching means having a valve body that can be switched from the outside of the fluid transport pipe is provided, when the chemical liquid is injected into the fluid in the pipe, it is switched to a state in which the chemical liquid injection path and the supply pipe connection path communicate with each other. By switching the means, the chemical liquid can be reliably injected into the fluid in the pipe. When the chemical liquid is not injected into the pipe fluid, the switching means is switched to a state in which the communication between the chemical liquid injection path and the supply pipe connection path is cut off. The supply of the chemical liquid to the in-pipe fluid can be stopped reliably.
Then, a scraper insertion passage is provided concentrically with the axial center of the chemical injection path at a position sandwiching the valve body with the chemical injection path, and the scraper extends between the scraper insertion path and the chemical injection path. A through-hole that can be inserted through is formed concentrically with the rotational axis of the valve body, and a seal portion is provided to close the gap between the scraper and the peripheral surface of the scraper insertion passage. Even when the switching means is switched to a state in which the chemical solution injection path and the supply pipe connection path communicate with each other so that the chemical solution does not interfere with the rotation operation, the through hole formed in the valve body and the scraper is inserted. The scraper can be inserted between the scraper insertion path and the chemical solution injection path so as not to leak to the outside through the passage.
Therefore, even when the chemical liquid is being injected into the in-pipe fluid, the scraping tool inserted between the scraper insertion path and the chemical liquid injection path without any particular operation of the switching means can be used on the peripheral surface of the chemical liquid injection path. The adhering substance adhering can be scraped off, and even after the adhering substance is scraped off, the chemical liquid can be injected into the in-pipe fluid without particularly operating the switching means.

  According to a second characteristic configuration of the present invention, the rotary operation tool of the valve body is provided so as to be rotatable around a rotation axis of the valve body, and the scraper insertion passage is formed concentrically with the rotary operation tool. It is in a certain point.

[Action and effect]
A rotary operating tool for the valve body is provided so as to be rotatable around the rotary shaft core of the valve body, and a scraper insertion passage is formed concentrically with the rotary operating tool. So that even if the space for connecting the fluid injection device to the fluid transport pipe is narrow, the scraper can be used to scrape off the adhering material while the valve body is removed. It is easy to connect the chemical injection device to the fluid transport pipe so that it can be rotated as necessary.

1 and 2 show a chemical solution injection apparatus A according to the present invention, a supply tube connection path 3 capable of connecting the chemical solution supply pipe 1 to the chemical solution injection path 2, and the length of the chemical solution injection path in the chemical solution injection path 2. A scraper 4 capable of scraping off deposits adhering to the peripheral surface by movement along the direction, and a scraper insert capable of being inserted through the scraper 4 from the outside of the fluid transport pipe B so as to be movable. From the outside of the fluid transport pipe B to the passage 5, the communication state in which the chemical liquid injection path 2 and the supply pipe connection path 3 communicate with each other, and the blocked state in which the communication between the chemical liquid injection path 2 and the supply pipe connection path 3 is blocked. A switching valve 7 as a switching means provided with a ball valve body 6 that can be switched is provided.

  As shown in FIGS. 3 and 4, the scraper 4 includes a stainless steel columnar head 9 slidably in contact with the inner peripheral surface of the chemical solution injection path 2 at both ends of the stainless steel rod 8. And a grip 10 for operation, respectively, a rod 8 is inserted through the scraper insertion passage 5 in advance, and a head 9 having a diameter larger than the outer diameter of the rod 8 is attached to the tip thereof.

As shown in FIGS. 3 and 4, the switching valve 7 is used for fluid transportation between the communication state and the shut-off state by rotating around the rotation axis that is concentric with the axis X of the chemical injection path 2 . A ball valve body 6 made of hard vinyl chloride resin, which can be switched from the outside of the tube B, is built in a housing 11 made of hard vinyl chloride resin with a ball seat 13 interposed therebetween. Has a T-shaped valve hole 6a.

  The housing 11 is provided with a rotation operation tool 12 for the ball valve body 6 concentrically with the rotation axis X of the ball valve body 6, and a supply for screwing and fixing the connection fitting 14 of the chemical solution supply pipe 1. The pipe connection path 3 is formed along a direction orthogonal to the rotational axis X of the ball valve body 6.

  The rotary operation tool 12 is disposed on the housing 11 side with the rotary shaft member 15 rotating integrally with the ball valve body 6, the handle 16 for rotating the rotary shaft member 15, and the rotary shaft member 16 being inserted. A retaining ring 17 that is screwed to prevent the rotary shaft member 15 from being removed, a sleeve nut 27 that is screwed into a protruding end portion of the rotary shaft member 15 from the handle 16, and a lock nut 28 that is screwed into the sleeve nut 27 are provided. The member 15 is inserted into the housing 11 and engaged with the ball valve body 6 so as to be rotatable around the rotation axis X of the ball valve body 6.

  The chemical solution injection path 2 is formed by screwing and fixing a cylindrical member 19 having a circular cross section made of hard vinyl chloride resin to a boss portion 18 formed in the housing 11, and is formed in the boss portion 18. The screw portion 20 is screwed into a pipe wall of a circulation pipe (an example of a fluid transport pipe) B that circulates water in a pool over a filtration device or the like, and a chemical solution injection path 2 is piped at the tip thereof into the circulation pipe B. It is provided so as to be connectable to the circulation pipe B so as to enter from the radial direction.

  In addition, in order to prevent the backflow of the fluid in the pipe from the circulation pipe B when the chemical solution supply pipe 1 is removed from the connection fitting 14, the connection fitting 14 is provided with a check valve 21.

  The scraper insertion passage 5 is provided at a position where the valve element 6 is sandwiched between the chemical liquid injection path 2, that is, on the rotary shaft member 15 so as to be concentric with the axis X of the chemical liquid injection path 2. A through-hole 22 that is formed concentrically and allows the scraper 4 inserted through the scraper insertion passage 5 to pass through the scraper insertion passage 5 and the chemical solution injection path 2. The ball valve body 6 is formed concentrically with the rotational axis X so that the head 9 of the scraping tool 4 enters the through hole 22.

  On the side of the housing 11 facing the scraper insertion passage 5, there is provided a seal portion 24 fitted with an O-ring packing 23 that closes the gap between the rod 8 of the scraper 4 and the peripheral surface of the scraper insertion passage 5. It is.

  Further, as shown in FIG. 5, a fan-shaped recess 26 formed on the housing 11 side with a pin 25 attached to the rotary shaft member 15 so as to protrude along a direction orthogonal to the rotary shaft core X. The retaining ring 17 is screwed and fixed to the housing 11 side in a state of being inserted, and the rotation range of the rotary operation tool 12 is brought into communication with the pin 15 by contact with the housing 11 side. The range is restricted to the open position for switching and the closed position for switching the ball valve body 6 to the shut-off state.

  Then, as shown in FIG. 5 (a), when the rotary operation tool 12 is rotated to the open position, the chemical solution injection path 2 and the supply pipe connection path 3 are connected to the valve hole of the ball valve body 6 as shown in FIG. When the rotation operation tool 12 is rotated to the closed position as shown in FIG. 5B, the supply pipe connection path 3 is connected to the ball valve body as shown in FIG. 6 is configured to be switched to a blocking state in which the communication between the chemical solution injection path 2 and the supply pipe connection path 3 is blocked.

[Other Embodiments]
1. As shown in FIG. 3, the chemical liquid injector according to the present invention may be one in which the scraper is always inserted through the scraper insertion passage, but the scraper may be used as necessary. It may be configured to be able to be inserted into the scraper insertion passage.
2. In the chemical liquid injector according to the present invention, the chemical liquid injection path may be formed integrally with the housing constituting the switching means over the entire length.
3. The chemical injection device according to the present invention may be configured such that deposits such as algae and shellfish attached to the peripheral surface of the chemical injection channel can be scraped off with a scraper.

Perspective view of chemical injection device Exploded perspective view of chemical injection device Longitudinal sectional view of chemical injection device Longitudinal sectional view of chemical injection device Cross section of the main part

DESCRIPTION OF SYMBOLS 2 Chemical solution injection path 3 Supply pipe connection path 4 Scraping tool 5 Scraping tool insertion path 6 Valve body 7 Switching means 12 Rotating operation tool 22 Through-hole 24 Seal part B Fluid transport pipe X Shaft core (rotating shaft core)

Claims (2)

The chemical solution injection path is provided so as to be connectable to the fluid transport pipe so that the tip thereof enters the fluid transport pipe from the pipe diameter direction.
A supply pipe connection path capable of connecting the chemical liquid supply pipe to the chemical liquid injection path, and scraping off the adhering material adhering to the peripheral surface by movement along the longitudinal direction of the chemical liquid injection path in the chemical liquid injection path A chemical injection device provided with a free scraper and a scraper insertion passage through which the scraper can be freely moved from the outside of the fluid transport pipe ,
In the rotating operation of a rotary axis around an axis coaxial with the liquid injection passage, and a state in which said liquid injection passage and the supply pipe connection path are communicated, and the chemical injection channel and the supply tube connecting passage Switching means provided with a valve body that can be switched from the outside of the fluid transport pipe in a state where communication is cut off, and
The scraper insertion passage is provided concentrically with the axial center of the chemical injection passage at a position sandwiching the valve body with the chemical injection passage, and the scraper is inserted into the scraper insertion passage and the chemical liquid. A through hole that can be inserted through the injection path is formed concentrically with the rotary shaft core in the valve body,
The chemical | medical solution injection device which provided the seal | sticker part which plugs up the clearance gap between the said scraping tool and the surrounding surface of the said scraping tool insertion path.   2. The chemical solution injection according to claim 1, wherein the rotary operation tool of the valve body is provided so as to be rotatable around a rotation axis of the valve body, and the scraper insertion passage is formed concentrically with the rotary operation tool. apparatus.

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