JP2012041950A - Flange joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flange joint capable of preventing damage due to connection of a connection pipe and performing rectification.SOLUTION: Provided is the flange joint 7 connectable to a flange part 23 arranged on an end part of a flange pipe 6 forming a pipe line. The flange joint having an inner diameter formed of a tapered surface 27a in an inner surface includes: a connection part 27 formed so as to insert the connection pipe 9 from one end of the flange joint; and a collar part 28 arranged on the other end, which connects to the flange part 23 of the flange pipe 6.

Description

  The present invention relates to a flange joint connected to a connection pipe such as a pipe.

  Currently, well water is used by increasing the pressure of well water using a feed pump. The well water is subjected to removal of iron and manganese contained in the well water and sterilization using a sterilizer and a filtration tank.

  The sterilizer is sequentially provided on the secondary side of a water supply pump that supplies well water, and sterilizes by injecting a chemical solution, for example, sodium hypochlorite, into the well water supplied by the water supply pump. In addition, the sterilizer oxidizes and deposits iron contained in the well water supplied by this chemical solution. The filtration tank performs iron removal by filtering the precipitated iron. In addition, a filtration tank performs manganese removal by adsorbing manganese with the filter medium provided in the inside.

  Such a sterilizer includes a chemical tank for storing chemical liquid, a connecting pipe for circulating well water, a flow rate detector for detecting the flow rate of well water for injecting chemical liquid, and a chemical liquid injection means for injecting chemical liquid. A configuration is used in which a chemical solution is injected from the injection portion of the connecting pipe in accordance with the flow rate (see, for example, Patent Document 1). For example, a flow rate detector having a rotor blade with a magnet and detecting the rotation of the rotor blade with a magnet is used. However, in the flow path detector using the rotor blade, when iron oxidized and deposited by the chemical solution adheres to the surface, the rotation of the rotor blade is affected, and the function may be deteriorated. Thus, a technique is known in which the flow path detector is used on the upstream side of the injection portion of the connecting pipe so that iron deposited by oxidation does not adhere to the rotor blades.

  In addition, the sterilizer is provided in a connecting pipe in which a flange joint provided with a thread portion for connecting the connecting pipe to a connecting pipe such as a discharge pipe of a water supply pump or a secondary side pipe is a flange pipe. As such a flange joint, a molded one made of a resin material is used for corrosion resistance, weight reduction of the sterilizer, and cost reduction.

JP 2006-81976 A

  The flange joint described above has the following problems. That is, in the sterilizer described above, when connecting the connecting pipe to the connecting pipe, the flange joint is firmly connected to a pipe formed of a metal pipe such as a stainless steel pipe or a valve socket formed of hard vinyl chloride. Then, there exists a possibility that a screw part may be damaged. If the threaded portion is damaged, leakage occurs, so that it is necessary to replace the flange joint, and the replacement cost and working time increase. For example, a method of inserting a joint made of bronze or stainless steel into the threaded portion of the flange joint is conceivable, but there is a problem that the manufacturing cost increases.

  Moreover, in the sterilizer described above, the flow rate detector is provided on the upstream side of the inlet, but if a vent pipe or the like is used for the connecting pipe connected to the connecting pipe, the upstream side of the connecting pipe, that is, The flow may be disturbed near the flow rate detector. If the flow of well water is disturbed in the vicinity of the flow rate detector, the rotation of the rotor blades is also disturbed, and the flow rate detection accuracy may be reduced.

  Therefore, an object of the present invention is to provide a flange joint that can prevent breakage due to connection of connection pipes and that can be rectified.

  In order to solve the problems and achieve the object, the flange joint of the present invention is configured as follows.

  As one aspect of the present invention, in a flange joint connectable to a flange portion provided at an end portion of a flange pipe forming a pipe line, the flange joint has an inner diameter formed by a tapered surface, and the connection pipe is connected from one end portion. There is provided a flange joint comprising: a connecting portion formed so as to be insertable; and a flange portion provided at the other end portion and connected to the flange portion of the flange pipe.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the flange coupling which can prevent the failure | damage by the connection of a connection pipe, and can rectify | straighten.

The top view which shows the structure of the sterilizer using the flange coupling which concerns on one embodiment of this invention. Sectional drawing which expands and shows the principal part structure of the same sterilizer. The top view which shows the principal part structure of the flange joint. Sectional drawing which expands and shows the principal part structure of the same sterilizer.

Hereinafter, the sterilizer 1 using the flange joint 7 according to an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a plan view showing a configuration of a sterilizer 1 using a flange joint 7 according to an embodiment of the present invention from the front, and FIG. 3 is an enlarged cross-sectional view showing the configuration of the primary side and the flange joint 7, FIG. 3 is a plan view showing the configuration of the rectifying plate 29 of the flange joint 7 from the front, and FIG. FIG. 3 is an enlarged cross-sectional view showing the configuration of the secondary side of the connecting pipe 6 and the flange joint 7. In FIG. 1, B represents a bolt, F represents a well water flow, G represents a chemical flow, and S represents a signal line.

  As shown in FIG. 1, the sterilizer 1 includes a gantry 3, a chemical solution tank (chemical solution tank) 4, a chemical solution injection means 5, a connecting pipe 6, a flange joint 7, and a control unit 8. Yes. Such a sterilizer 1 has, for example, a primary side connected to a water supply pump and a secondary side connected to a filtration tank. The sterilizer 1 uses, for example, sodium hypochlorite as a chemical solution used for sterilization.

  The water supply pump is, for example, disposed in a well, formed to be capable of pumping well water, and connected to a flange joint 7 on the primary side of the connecting pipe 6 via a connecting pipe 9 connected to the discharge port. The filtration tank is formed so that, for example, iron deposited by a sterilizer and manganese contained in well water can be removed. The filtration tank is connected to the flange joint 7 on the secondary side of the connecting pipe 6 through the connecting pipe 10 connected to the suction port.

  The connecting pipes 9 and 10 are made of a resin material such as hard vinyl chloride that can be bonded. In addition, in order to connect the connecting pipes 9 and 10 to the feed water pump and filtration tank to which they are connected, depending on the arrangement of the feed water pump, the filtration tank and the sterilizer 1, a bent pipe or the like that is bent in the middle is used.

  The gantry 3 has a pedestal 11 on which the connecting pipe 6 can be disposed, a top 12 on which the chemical liquid tank 4 is disposed, and the pedestal 11 and the top 12, and a chemical injection means 5. The wall part 13 which can arrange | position can be provided.

  The chemical liquid tank 4 is formed so that a predetermined amount of chemical liquid can be stored therein. The chemical solution tank 4 is connected to the chemical solution injection means 5 via the chemical solution supply pipe 15.

  The chemical solution injection means 5 includes an injection pump 17 capable of injecting a certain amount of chemical solution, and a chemical solution injector 18 for connecting the injection pump 17 and the connecting pipe 6. As the infusion pump 17, for example, a diaphragm pump is used. The chemical solution injector 18 is formed to prevent back flow of the chemical solution and well water injected into the connecting pipe 6. The chemical solution injector 18 is disposed on the secondary side of the connecting pipe 6, specifically, on the secondary side of a flow rate detector 21 described later in the connecting pipe 6.

  The connecting pipe 6 forms a pipe, and a flow rate detector 21 provided on the primary side thereof and a chemical liquid injector 18 provided on the secondary side thereof so that a chemical liquid can be injected into the pipe line. And an injection part 22. The connecting pipe 6 is a flange pipe having a flange portion 23 for fastening and fixing the flange joint 7 with bolts B or the like at both end faces thereof.

  As shown in FIGS. 1 and 2, the inner diameter of the connecting pipe 6 gradually decreases (becomes smaller) from the flange portion 23 on the primary side to the flow rate detector 21, and in the vicinity of the flow rate detector 21. The same diameter is formed. Further, the connecting pipe 6 is formed in a shape in which the inner diameter from the flow rate detector 21 to the injection portion gradually increases (becomes larger). As described above, the connecting pipe 6 is formed so that the inner diameter shape is reduced from the primary side to the flow rate detector 21 and gradually increased from the flow rate detector 21 to the injection portion 22.

  The flow rate detector 21 includes a rotating blade 24 that rotates according to the flow of fluid in the connecting pipe 6, a magnet 25 that detects the rotation of the rotating blade 24, and rotation information (signal) of the rotating blade 24 detected by the magnet 25. Is transmitted to the control unit 8. The rotary blade 24 has a rotary shaft 24a and a plurality of blade portions 24b provided on the rotary shaft 24a radially at equal intervals.

  In the flow rate detector 21, a wing portion 24 b located on one side with respect to the rotating shaft 24 a is disposed in the pipe line of the connecting pipe 6. That is, the flow rate detector 21 is configured so that half of the rotary blade 24 is placed in the pipe line of the connection pipe 6 around the rotary shaft 24a so that the rotary blade 24 rotates with respect to the flow path in the connection pipe 6. Is arranged outside the pipeline. Therefore, for example, the connecting pipe 6 has a storage chamber in which a part of the flow rate detector 21 is stored adjacent to the pipe line. The flow rate detector 21 is configured to transmit the rotation information (signal) of the rotor blade 24 detected by the magnet 25 to the control unit 8 via the signal line S.

  The flange portion 23 is formed so that the flange joint 7 can be fixed by fastening the flange joint 7 with a bolt B. The injection part 22 is arranged on the secondary side of the connecting pipe 6 and is formed so that the chemical liquid injector 18 can be fixed. In addition, as shown in FIG. 1, the injection | pouring part 22 may be formed of the pipe member separable from the other part of the connection pipe 6, and may be formed integrally with the other part of the connection pipe 6. Good.

  The flange joint 7 includes a connection portion 27, a flange portion 28, and a rectifying plate 29. In the flange joint 7, for example, the connecting portion 27, the flange portion 28, and the rectifying plate 29 are integrally formed of a resin material such as hard vinyl chloride.

  The connecting portion 27 is formed in a hollow circular tube, and both end surfaces thereof are open, and the inner surface thereof is formed by a tapered surface 27a so that the inner diameter gradually decreases from one end surface toward the other end surface. . That is, the inner diameter of the connecting portion 27 is formed by a truncated cone-shaped tapered surface 27a that gradually decreases in diameter. The connecting portion 27 is provided with a flange portion 28 at an end portion on the side where the inner diameter becomes smaller. In addition, the connecting portion 27 is provided with ribs 27b that are reinforcing members that pass the flange portion 28 and the outer surface thereof symmetrically with respect to the axis. Such a connecting portion 27 is formed so that the connecting pipe 9 can be inserted into the inside thereof and the connecting pipe 9 can be bonded and fixed by an adhesive.

  The flange portion 28 is provided on the other end surface side, and the end surface 28 a is formed so as to be in contact with the end surface of the flange portion 23. In the flange portion 28, a groove portion 28 b for attaching a seal member such as packing is formed on an end surface 28 a that contacts the flange portion 23. Further, the flange portion 28 has an insertion hole 28 c for inserting the bolt B, and the flange joint 7 can be attached to the connecting pipe 6 using the bolt B.

  The rectifying plate 29 is provided on the flange portion 28 side of the inner surface of the connection portion 27. Specifically, the rectifying plate 29 is provided on the inner surface adjacent to the connecting pipe 6 when the flange joint 7 is fixed to the connecting pipe 6 in the pipe line of the connecting portion 27 on the other end face side. The rectifying plate 29 is configured by a plurality of fins 29a that are rotationally arranged at equal intervals around the axis of the flange joint 7 (arranged symmetrically). Specifically, as shown in FIG. 3, the rectifying plate 29 is point symmetric about the axis of the connection portion 27 of the flange joint 7 on the inner surface of the connection portion 27 when viewed from the flow F direction. As shown in the figure, it is formed into four cross-shaped shapes that are arranged at equal intervals with the adjacent fins 29a.

  The control unit 8 is configured to be able to control (adjust) the amount of the chemical liquid injected from the infusion pump 17 based on the flow rate signal transmitted from the flow rate detector 21. Specifically, the control unit 8 includes a storage unit 8a that stores an injection amount of the chemical liquid with respect to the flow rate. The control unit 8 calculates the amount of the chemical solution to be injected from the flow rate detected by the flow rate detector 21 and the injection ratio with respect to the flow rate stored in the storage unit 8a. The control unit 8 controls the reciprocating speed of the injection pump 17 so as to inject the calculated amount of the chemical solution, thereby controlling the amount of the chemical solution to be injected.

  As shown in the well water flow F, the sterilizer 1 configured in this way detects the flow rate of the well water pumped from the connection pipe 9 on the primary side connected to the connecting pipe 6 by the flow rate detector 21. The control unit 8 controls the injection amount of the chemical solution based on the flow rate detected by the flow rate detector 21 and the injection rate of the chemical solution stored in the storage unit 8a.

  The chemical solution injection means 5 injects the chemical solution controlled by the control unit 8 from the chemical solution injector 18 into the connecting pipe 6 through the injection unit 22. As a result, the well water and the chemical solution are mixed in the connecting pipe 6 to perform sterilization and precipitation of iron, and to the secondary side through the connecting pipe 10 connected to the secondary side of the connecting pipe 6. Well water flows.

  Further, the flange joint 7 provided on the primary side of the connecting pipe 6 allows the well water to flow through the rectifying plate 29 so that the well water flows through the rectifying plate 29 as shown in the flow F of FIG. Rectify F. In addition, the flange joint 7 provided on the secondary side of the connecting pipe 6 causes the well water to stir the chemical solution by the chemical solution injected from the injection portion 22 colliding with the rectifying plate 29 as shown in the flow G of the chemical solution. .

  According to the sterilizer 1 configured as described above, the flange joint 7 is formed by inserting the connecting pipes 9 and 10 and bonding them with an adhesive because the inner surface of the connecting portion 27 is formed by the tapered surface 27a. Thus, the flange joint 7 and the connecting pipes 9 and 10 can be connected. That is, since the flange joint 7 and the connection pipes 9 and 10 can be connected to each other only by insertion and adhesion, an excessive load is applied when the connection pipes 9 and 10 are connected even if the flange joint 7 is formed of a resin material. Not. Thus, it becomes possible to prevent the flange joint 7 made of a resin material from being damaged by reducing the load at the time of connection.

  Specifically, since the flange joint 7 is formed of a resin material, for example, when the connection with the connection pipe is performed by fastening with the threaded portion, the flange joint 7 or the connection pipes 9 and 10 are secured by fastening the threaded portions. There is a risk of damage. In particular, if the connecting pipes 9 and 10 are made of metal, an excessive load is applied to the flange joint 7, and there is a high risk of the flange joint 7 being cracked.

  However, according to the flange joint 7 of the present embodiment, the connection with the connection pipes 9 and 10 may be performed by inserting the connection pipes 9 and 10 into the connection portion 27 and bonding with an adhesive. Can be prevented from being applied. For this reason, the crack of the flange joint 7 can be prevented and the reliability of the flange joint 7 can be improved.

  Further, since the rectifying plate 29 is formed integrally with the flange joint 7, the rectifying plate 29 becomes a reinforcing member, and the mechanical strength of the flange joint 7 can be improved. In particular, since the rectifying plate 29 is composed of a plurality of fins 29a that are arranged at equal intervals around the axis of the flange joint 7 (symmetrically arranged), the strength of the flange joint 7 is evenly distributed. Can be improved. Thereby, it becomes possible to further prevent the occurrence of cracks due to the connection of the connecting pipes 9 and 10 of the flange joint 7.

  Further, the rectifying plate 29 can prevent the connecting pipes 9 and 10 from being excessively inserted into the connecting portion 27. More specifically, the inner diameter of the flange joint 7 and the outer diameter of the connection pipes 9 and 10 are preferably such that when the connection pipes 9 and 10 are inserted into the flange joint 7 by a predetermined length, the connection pipes 9 and 10 are connected to the connection portion 27. Are formed to have diameters that can be fitted into each. However, depending on the dimensional accuracy, the connecting pipes 9 and 10 may be inserted into the flange joint 7 by a predetermined length or more. In this case, the inserted connecting pipes 9 and 10 are connected to the current plate 29. The contact pipes 9 and 10 can be prevented from being inserted excessively.

  In addition, the sterilizer 1 can rectify the flow of well water passing through the flange joint 7 by the rectifying plate 29 of the flange joint 7 provided on the primary side. Thereby, the flow of water passing through the rotary blade 24 of the flow rate detector 21 provided on the secondary side of the flange joint 7 and on the primary side of the connecting pipe 6 becomes a rectified flow. It becomes possible to rotate stably. Thereby, the accuracy of the flow rate detected by the flow rate detector 21 is improved.

  Further, the chemical solution injected from the injection part 22 collides with the rectifying plate 29 of the flange joint 7 provided on the secondary side of the injection part 22. As shown in FIG. 4, the chemical liquid that has collided with the current plate 29 is dispersed and passes through the flow path between the fins 29a.

  Further, well water, in particular, well water flowing through the center side of the rectifying plate 29 is dispersed by the rectifying plate 29 in the same manner as the chemical solution. Due to the dispersion of the chemical solution and the well water, the chemical solution and the well water are dispersed by the rectifying plate 29, and the flow is disturbed due to the difference in specific gravity, and the chemical solution and the well water are stirred. Thus, the current plate 29 of the flange joint 7 allows the chemical solution and the well water to be mixed, and the unevenness in the chlorine concentration in the well water can be reduced.

  As described above, the flange joint 7 is provided with the rectifying plate 29 so that the fluid passing through the rectifying plate 29 can be rectified, and the liquid colliding with the rectifying plate 29 is a plurality of fluids having different specific gravity. Thus, it becomes possible to stir these fluids.

  As described above, according to the sterilizer 1 using the flange joint 7 according to the present embodiment, the flange joint 7 can be prevented from being damaged due to the connection of the connection pipes 9 and 10, and flows through the connection pipe 6. Fluid rectification is possible. Further, by using the flange joint 7 for the sterilizer 1, it is possible to agitate the chemical solution and well water injected from the chemical solution injection means 5, which are a plurality of fluids having different specific gravity passing through the flange joint 7.

  The present invention is not limited to the above embodiment. For example, in the above-described example, the rectifying plate 29 is configured to use the four fins 29a, but is not limited thereto. For example, two or three fins arranged at equal intervals with respect to the axis of the flange joint 7 may be used, or five fins may be used. For example, when two fins are provided, the rectifying plate is a single-letter rectifying plate that passes the inner surface of the flange. The thickness and number of the fins 29a may be in a range that does not increase the flow path resistance of the fluid passing through the flange joint 7.

  In the example described above, the connection between the flange joint 7 and the connection pipes 9 and 10 has been described as using an adhesive, but the present invention is not limited to this. For example, a tape-like member that can be sealed in between may be wound around the connecting pipes 9 and 10 and the connecting pipes 9 and 10 may be inserted into the flange joint 7.

  In the above-described example, the flange joint 7 is configured to have the flange portion 28. However, the flange joint 7 does not have the flange portion 28, and has, for example, a flange joint and a connecting pipe (flange pipe) having a thread portion. The joint and the connecting pipe may be configured to be screwed together via a seal member.

  Moreover, the flange joint 7 may further have a configuration in which an internal thread portion communicating with the inside is provided at an upper portion thereof, and a plug is screwed into the internal thread portion. By adopting such a configuration, it is possible to easily collect water on the primary side and the secondary side of the connecting pipe 6 of the sterilizer 1 by allowing the water in the flange joint 7 to be taken by loosening the plug. Is possible. In particular, in the sterilizer 1, an operation for measuring a change in the chlorine concentration is conceivable. For this reason, it is possible to improve the workability by having an internal thread portion capable of screwing the plug. Become.

  Furthermore, although the sterilizer 1 demonstrated the structure used for the well water supplied with the water supply pump in the example mentioned above, it is not limited to a well water. Any device that injects a chemical into a fluid can be set as appropriate. In addition, various modifications can be made without departing from the scope of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Sterilizer, 3 ... Mount, 4 ... Chemical solution tank, 5 ... Chemical solution injection means, 6 ... Connection pipe (flange pipe), 7 ... Flange joint, 8 ... Control part, 8a ... Memory | storage part, 9, 10 ... Connection Pipe 11, Stand 12, Top 12, Wall 13, Chemical supply pipe 17, Injection pump 18, Chemical injector 21, Flow detector 22, Injection 23, Flange 24 ... Rotary blade, 24a ... Rotating shaft, 24b ... Wing portion, 25 ... Magnet, 27 ... Connection portion, 27a ... Tapered surface, 27b ... Rib, 28 ... Bridge portion, 28a ... End surface, 28b ... Groove portion, 28c ... Insertion hole , 29 ... current plate, 29 a ... fins, B ... bolts, F ... water flow, G ... chemical liquid flow, S ... signal line.

Claims (4)

In the flange joint that can be connected to the flange portion provided at the end of the flange pipe that forms the pipe line,
The inner surface has an inner diameter formed by a tapered surface, and a connection portion formed so that a connection pipe can be inserted from one end portion;
A flange portion provided at the other end portion and connected to the flange portion of the flange pipe;
A flange joint comprising:   The flange joint according to claim 1, further comprising a rectifying plate provided on an inner surface on the other end side of the connection portion.   The flange joint according to claim 2, wherein the current plate includes a plurality of fins arranged at equal intervals around the axis of the connection portion.   The flange joint according to claim 3, wherein the rectifying plate is integrally formed with the connecting portion and a resin material.

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