JP4931974B2 - Leak detection device and leak detection method for vertical oil pump - Google Patents

Description

  The present invention relates to a leak inspection apparatus and a leak inspection method for a vertical oil pump. In particular, the present invention relates to an apparatus and a method for detecting water, oil, and the like leaking from a barrel of a vertical oil pump from a hole in which the barrel is accommodated.

  In a thermal power plant or the like, crude oil stored in a tank is transferred to a combustion chamber of a boiler using an oil feed pump. As this oil feed pump, for example, a saddle type pump is used. In this saddle type pump, a bottomed cylindrical pump called a barrel is accommodated in a saddle hole drilled in the ground, and a motor for driving the pump is installed on the ground coaxially with the pump.

  As a vertical pump having such a configuration, a vertical pit barrel type pump as a feed water booster pump is disclosed (for example, see Patent Document 1).

  A vertical oil pump used in a thermal power plant or the like has a pipe wound around the outer periphery of a barrel. And the barrel is kept warm by circulating the surplus steam obtained in the boiler through this pipe. Further, a drain pipe for sending oil inside the barrel to the ground is also connected to the bottom of the barrel.

Japanese Utility Model Publication No. 61-142195

  However, if the performance of the vertical oil pump described above deteriorates, it is necessary to check the barrel. This is because it is necessary to check whether steam (condensed water) or oil leaks due to corrosion or the like in the barrels accommodated in the pits.

  In this case, since the barrel of the vertical oil pump has a considerable weight, the barrel is lifted by the crane after the motor is removed. And it was inspected whether water or oil-based drain was accumulated in the bottom part of the pit which accommodates a barrel.

  The inner wall of the pothole that accommodates the barrel is sealed with concrete, and the opening of the pothole is sealed with a flange provided on the barrel. Therefore, the pothole has a structure in which groundwater or rainwater does not easily stay inside.

  As described above, the leak detection method of the conventional vertical oil pump takes a lot of cost and time such as removing the motor, reassembling the motor, and using a crane.

  Leak detection device and leak detection of vertical oil pump that can easily check whether water or oily drain is not staying at the bottom of the hole that accommodates the barrel without removing the motor or using a crane If the method can be realized, the cost and time required for inspection can be reduced. The above can be said to be the subject of the present invention.

  This invention is made in view of such a subject, and it aims at providing the leak detection apparatus and leak detection method which detect easily the water, oil, etc. which leak from the barrel of a vertical oil pump. To do.

  In order to achieve the above object, the present inventors have found that an inspection opening is provided in a flange provided in the barrel, and a detection rod is inserted into the inspection opening, so that water or oil leaking from the barrel can be easily detected. Based on this, the inventors have invented the following leak detection device and leak detection method for vertical oil pumps.

  (1) A leak detection device for a vertical oil pump according to the present invention includes a cylindrical barrel housed in a bore hole drilled in the ground, a pipe disposed around the barrel and through which steam circulates, A leak detection device for a vertical oil pump comprising a flange provided at an upper end of a barrel and sealing the opening of the borehole, wherein the flange is positioned between an outer periphery of the barrel and an inner wall of the borehole And an inspection bar having a length to be inserted into the inspection opening and reach the bottom surface of the pothole.

  (2) It is preferable that the inspection rod is composed of a fiber rod having a low water content that absorbs water that has leaked into the bottom of the pothole and changes color.

  (3) It is preferable that the fiber rod includes an air-drying material that is left in the atmosphere and dried.

  (4) It is preferable that the said inspection rod has a hollow flow path.

  (5) It is preferable to further include a vacuum suction device that is connected to the inspection rod and can suck the liquid leaked to the bottom of the pothole.

  (6) It is preferable that the inspection rod is reused by deleting a portion where the leaked liquid adheres to the bottom of the hole together with the surface of the inspection rod.

  (7) A detection method for a vertical oil pump according to the present invention includes a cylindrical barrel housed in a bore hole drilled in the ground, a pipe disposed around the barrel and through which steam flows, and the barrel A leak detection method for a vertical oil pump including a flange that is provided at an upper end of the vertical hole and seals the opening of the vertical hole, wherein the inspection opening is positioned between the outer periphery of the barrel and the inner wall of the vertical hole. Is inserted into the inspection opening. The inspection rod has a length that passes through the flange and reaches the bottom surface of the hole.

  (8) It is preferable that the inspection rod has a hollow flow path, and the inspection rod is connected to a vacuum suction device to suck the liquid leaked to the bottom of the pothole.

  The leak detection device for a vertical oil pump according to the present invention inserts an inspection rod into the inspection opening provided in the flange, causes the tip of the inspection rod to reach the bottom of the hole, and the trace left at the tip of the inspection rod. Therefore, the presence or absence of water or oil leaking from the barrel can be easily detected.

  In addition, the vertical oil pump leakage detection device according to the present invention comprises a check rod made of a fiber rod having a low water content, and absorbs water that has leaked into the bottom of the well and discolors it. Can also be checked.

It is a longitudinal cross-sectional view which shows the structure of the leak detection apparatus of the vertical oil pump by one Embodiment of this invention. It is a perspective view which shows the structure of the barrel of the vertical oil supply pump which concerns on this invention.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  Initially, the structure of the leak detection apparatus of the vertical oil pump by one Embodiment of this invention is demonstrated. FIG. 1 is a longitudinal sectional view showing a configuration of a leak detection device for a vertical oil pump according to an embodiment of the present invention. FIG. 2 is a perspective view showing the structure of the barrel of the vertical oil pump according to the present invention.

  1 and 2, a vertical oil pump 10 according to the present invention includes a cylindrical barrel 1. The barrel 1 is accommodated in a pothole 1h formed in the ground G. The vertical oil pump 10 includes a pipe 2.

  Referring to FIGS. 1 and 2, the pipe 2 is disposed so as to wind around the barrel 1. Through the pipe 2, excess steam (superheated steam) obtained by a boiler (not shown) is circulated to keep the barrel 1 warm.

  1 and 2, the vertical oil pump 10 includes a flange 1f. The flange 1 f is provided at the upper end of the barrel 1. The flange 1f seals the opening of the hole 1h.

  Referring to FIGS. 1 and 2, the barrel 1 includes a discharge pipe 1d. One end of the discharge pipe 1 d is connected to the bottom of the barrel 1. The discharge pipe 1d can discharge the oily drain remaining in the barrel 1 to the ground.

  Referring to FIG. 2, the discharge pipe 1 d has a pipe 2 wound together with the barrel 1, and steam (superheated steam) is circulated through the pipe 2 to keep the oily drain flowing through the discharge pipe 1 d warm. Yes. The barrel 1, the pipe 2, and the discharge pipe 1d are covered with a heat insulating material (not shown) except for the bottom.

  Referring to FIG. 1, the vertical oil pump 10 includes a pedestal 3. The pedestal 3 has a suction port 3a and a discharge port 3b. The base 3 has a flange 3f at the lower end. The flange 3f is fixed to the flange 1f with a fastener such as a bolt.

  Referring to FIG. 1, a motor 4 is installed on the top of the pedestal 3. An output shaft (not shown) of the motor 4 is coaxially connected to a screw (not shown) held inside the barrel 1.

  Referring to FIG. 1, when the motor 4 is driven, the screw inside the barrel 1 is rotated, and the oil stored in the tank can be sucked from the suction port 3a and transferred from the discharge port 3b to the combustion chamber of the boiler.

  Referring to FIG. 1, liquid L such as water leaked from the pipe 2 or oil leaked from the barrel 1 and the discharge pipe 1d may stay in the bottom of the pit 1h.

  Next, the configuration of the leak detection apparatus 100 according to the embodiment of the present invention will be described.

  Referring to FIG. 1, the leak detection device 100 includes an inspection opening 50 that penetrates through the flange 1 f and an inspection rod 5 that is inserted into the inspection opening 50. The inspection opening 50 is located between the outer periphery of the barrel 1 and the inner wall of the pothole 1h. The inspection opening 30 is provided concentrically with the inspection opening 50 in the flange 3f. The inspection bar 5 has a length that reaches the bottom surface of the pothole 1h.

  In FIG. 1, the inspection rod 5 is composed of a fiber rod having a low water content (so-called dry fiber rod) that absorbs water leaked at the bottom of the pothole 1h and changes its color. The fiber rod includes an air-drying material that is left in the atmosphere and dried, so-called naturally dried wood. The fiber rod can also include a pipe wound with paper.

  In FIG. 1, it is preferable that the inspection rod 5 has a hollow channel 5a capable of sucking the liquid L leaked to the bottom of the pit 1h. And the liquid L can also be attracted | sucked using the inspection rod 5 which can measure the liquid level of the bottom part of the well 1h by connecting the hollow inspection rod 5 to a vacuum suction machine (not shown). That is, it can be confirmed whether the liquid L is water, oil, or both water and oil.

  Next, the operation of the leak detection apparatus 100 according to the embodiment of the present invention will be described.

  Referring to FIG. 1, a leak detection apparatus 100 according to an embodiment of the present invention inserts an inspection rod 5 into an inspection opening 50 provided in a flange 1f, and causes the tip of the inspection rod 5 to reach the bottom surface of a pothole 1h. The presence or absence of water or oil leaking from the barrel 1 can be easily detected from the traces left at the tip of the bar 5.

  Referring to FIG. 1, the leak detection apparatus 100 according to the embodiment of the present invention is configured such that the inspection rod 5 is made of a fiber rod having a low water content, and the water leaked to the bottom of the pothole 1 h is absorbed and discolored. Colorless and transparent leaking water can be checked.

  As the fiber rod having a low water content, it is preferable to use a naturally dried wood which is easily available and inexpensive. However, the fiber rod having a low water content is not limited to naturally dried wood, and a pipe (paper pipe) wound with paper may be used.

  Further, by using wood as the inspection rod 5, the portion where the liquid L leaked to the bottom of the well 1h is removed together with the surface of the inspection rod 5, and the inspection rod 5 can be reused.

  The leak detection method according to the embodiment of the present invention has a length that passes through the inspection opening 50 through the flange 1f and reaches the bottom surface of the pothole 1h so as to be positioned between the outer periphery of the barrel 1 and the inner wall of the pothole 1h. By inserting the inspection rod 5 into the inspection opening 50, it is possible to inspect the presence or absence of liquid remaining at the bottom of the pothole 1h.

  As described above, the leak detection device and the leak detection method of the vertical oil pump according to the embodiment of the present invention are the same as in the prior art, without the motor being removed and without using the crane. It is possible to easily check whether liquid such as water or oil stays at the bottom of the water.

  Therefore, the leak detection apparatus and the leak detection method of the vertical oil pump according to the embodiment of the present invention can reduce the cost and time required for checking the liquid such as water or oil leaking from the barrel as compared with the conventional case.

1 Barrel 1f Flange 1h Borehole 2 Pipe 5 Inspection rod 10 Vertical oil pump 50 Inspection opening 100 Leak detection device G Ground

Claims (6)

A cylindrical barrel accommodated in a pothole drilled in the ground, a pipe disposed around the barrel and through which steam flows, and a flange provided at the upper end of the barrel and sealing the opening of the pothole A leak detection device for a vertical oil pump comprising:
An inspection opening penetrating the flange so as to be located between the outer periphery of the barrel and the inner wall of the hole,
An inspection rod having a length inserted into the inspection opening and reaching the bottom surface of the hole ,
The inspection rod is a leak detection device for a vertical oil pump comprising a fiber rod having a low water content that absorbs water and discolors the water leaked to the bottom of the pothole. The leak detection device for a vertical oil pump according to claim 1, wherein the fiber rod includes an air-drying material that is left in the atmosphere and dried. The inspection rod has a hollow flow path,
  The leak detection apparatus for a vertical oil pump according to claim 1 or 2, further comprising a vacuum suction machine connected to the inspection rod and capable of sucking the liquid leaked to the bottom of the hole. The leak detection device for a vertical oil pump according to any one of claims 1 to 3, wherein the inspection rod is reused by deleting a portion where the leaked liquid adheres to the bottom of the saddle hole together with the surface of the inspection rod. . A cylindrical barrel accommodated in a pothole drilled in the ground, a pipe disposed around the barrel and through which steam flows, and a flange provided at the upper end of the barrel and sealing the opening of the pothole A leak detection method for a vertical oil pump comprising:
Through the inspection opening to the flange so as to be located between the outer periphery of the barrel and the inner wall of the hole,
Leakage of a vertical oil feed pump, which is composed of a fiber rod having a low water content that discolors by absorbing water leaked at the bottom of the well, and has a length that reaches the bottom of the well. Detection method. The inspection rod has a hollow flow path,
6. The leak detection method for a vertical oil pump according to claim 5, wherein the inspection rod is connected to a vacuum suction device to suck the liquid leaked to the bottom of the well.

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