KR102142369B1 - Drain Sewage Apparatus with adjustable length of pipe - Google Patents

Abstract

A sewage apparatus includes: a body which has an inlet pipe for introducing sewage, an accommodating part for collecting the sewage introduced into the inlet pipe, and an outlet pipe for discharging the sewage collected in the accommodating part; and a standing pipe coupled to an upper part of the body to extend the accommodating part to be close to a manhole cover installed on the ground. The standing pipe consists of a lower pipe coupled to the upper part of the body and an upper pipe coupled to an upper part of the lower pipe. The lower pipe and the upper pipe are coupled to increase or decrease the overall length of the standing pipe. According to an embodiment of the present invention, the length of the standing pipe coupled to the upper part of the body of the sewage apparatus can be adjusted to correspond to the embedded depth of the body regardless of construction field situation, thereby increasing work efficiency and speed.

Description

Drain Sewage Apparatus with adjustable length of pipe}

The present invention relates to a sewer that is capable of adjusting the length of a standing tube, and more specifically, it is possible to adjust the length of a standing tube that is coupled to the upper part of the receiving tube body, thereby adjusting the length of the standing tube to improve the convenience and speed of work. It's about possible sewage.

In general, wastewater is generated indoors of various buildings such as residential and commercial buildings, and washing water and rainwater (hereinafter referred to as'excellent') are used when washing the exterior and surroundings of the building.

In this way, wastewater and rainwater generated indoors and outdoors of the building are collected by a sewage collector buried in the ground and transferred to a water purification system.

In the past, due to the odor problem, wastewater and sewage were separately classified and buried for wastewater and sewage. A sewer formed by combining with one has been proposed, and a blocking device is provided inside the sewer to prevent odor from flowing backward and flowing into the room.

Looking at the structure of the conventional sewer, the main body having a receiving portion therein, the main inlet pipe formed on one side of the body, the outlet pipe formed on the other side of the body, and two auxiliary inlet pipes installed between one side and the other side of the body And, it is installed inside the main body and is connected to the main inlet pipe, and is composed of a U trap that prevents the backflow of odor due to the inflow of waste water and residual odor. Then, the main body having the receiving portion is buried deep underground, and the upper portion of the receiving portion of the main body is provided with a standing tube extending the receiving portion close to the manhole cover installed on the ground.

Here, since the length of the standing pipe varies depending on the distance between the manhole cover of the construction site and the main body buried underground, it is provided with a standing pipe having a length corresponding to the body depth or a long standing pipe is cut to length. Should be used.

However, since the distance between the manhole cover and the main body can be different every time, it is very cumbersome to prepare a standing tube of a length suitable for the depth of embedment of the main body, or to cut and use a long press tube according to the length. There was a problem of delaying the efficiency of the work.

In addition, some sewage may be accumulated at the bottom of the receiving part in the process of flowing through the outlet pipe after the wastewater flowing through the main inlet pipe or the auxiliary inlet pipe is collected in the receiving portion of the main body. When delivered, the sewage accumulated in the receiving portion freezes, thereby freezing the main body and the trap. This is a cause of leakage due to the freezing of the main body, and the standing pipe installed on the main body also has a problem in that underground cold air is transferred to generate the standing pipe.

Korean Registered Patent No. 10-1365935 (Registration Date 2014.02.17) Korea Registered Patent No. 10-1130757 (Registration Date 2012.03.20)

The present invention has been made to solve the conventional problems,

It is an object of the present invention to be able to improve the convenience and speed of work by freely adjusting the length of the upright tube to correspond to the depth of burial of the body at the construction site by enabling the length adjustment of the upright tube coupled to the upper part of the main body of the sewage. It is to provide a sewer capable of adjusting the length of the standing tube.

Another object of the present invention is to provide a sewage pipe capable of adjusting the length of a riser tube to prevent freezing of the riser tube and the main body by inserting a heat insulating member inside the riser tube to block the cold air transferred from the side wall of the riser tube. have.

Another object of the present invention is to combine the inner lid that shields the interior of the granular tube on the top of the granular tube, and maintain the gap with the inner lid on the heat insulating member inserted inside the granular tube, and at the same time maintain the gap between the inner lid and the handle. It is to provide a sewer capable of adjusting the length of the upright tube to prevent the backflow of sewage by having the insulating member supported on the inner lid through the gap holding rod.

Another object of the present invention is composed of a heat insulating member inserted into the interior of the granular tube as a heat insulating inner tube combined with a gap holding rod, and a heat insulating outer body accommodating the heat insulating inner body, so as to separate and combine the heat insulating inner body and the heat insulating outer body. It is to provide a sewer that can adjust the length of the standing tube which can facilitate the cleaning and maintenance of the main body receiving portion.

Another object of the present invention is to prevent the foreign matter from leaking by filtering the foreign matter by combining a filter screen at the inlet pipe outlet of the body, bellows connecting the connecting pipe to any one or both of the inlet pipe and outlet pipe of the body It is to provide a sewage pipe capable of adjusting the length of the upright pipe to prevent shock or damage to the main body and to prevent damage or damage to the connection pipe when ground subsidence occurs by providing a type connection member to enable the flow of the connection pipe.

A sewage receiving device capable of adjusting the length of a granular pipe provided according to an embodiment of the present invention provided to achieve the above object is an inlet pipe for introducing wastewater and a receiving portion for collecting wastewater flowing into the inlet pipe and the receiving portion The main body is provided with a discharge pipe for discharging the sewage collected in the; It includes; a standing pipe coupled to the upper portion of the main body to extend the receiving portion close to the manhole cover installed on the ground, including, the standing pipe is a lower pipe coupled to the upper portion of the main body and the upper pipe coupled to the upper portion of the lower pipe It is composed of, the lower pipe and the upper pipe is characterized in that it is combined to be able to reduce the length of the total length of the granular tube.

Here, the granular pipe is divided into a lower pipe and an upper pipe, and a pair of male and female fasteners that are mutually fastened are formed at an upper end of the lower pipe and a lower end of the upper pipe, and the length of the granular pipe depends on the fastening depth of the fastening portion. It is characterized by being different.

In addition to this, the interior of the granular tube is characterized in that a heat insulating member to block the cold air transferred from the side wall of the granular tube is inserted, and the heat insulating member is formed by a hollow outer heat insulating body and the hollow outer heat insulating body. It is composed of a heat-insulating inner cylinder that is inserted into a portion, and the heat-insulating outer cylinder and the heat-insulating inner cylinder are detachably coupled.

In addition, the detachable structure of the outer insulating body and the inner insulating body is characterized in that it is composed of a pair of arms, a pair of spiral ribs that are mutually fastened.

In addition to this, an inner lid for shielding the inside is coupled to the top of the granular tube, and functions as a handle to the inner insulating body of the insulating member while maintaining a gap with the inner lid so that the insulating member does not push upward. The function is characterized in that a gap holding rod supporting the insulating member to block the sewage flowing backward when the sewage is reversed is combined.

In addition, the bottom surface of the inner lid is characterized in that a heat insulating plate to block the cold air is coupled.

In addition, the upper portion of the heat insulating member is characterized in that a C-type elastic ring that is in close contact with the inner wall of the granular tube by tension force to restrain the heat insulating member from being pushed upward.

In addition to this, the inlet pipe inlet of the main body is characterized in that a filter screen to filter foreign matter is combined.

In addition, one or both of the inlet and outlet pipes of the main body is characterized in that a bellows type connecting member connecting the connecting pipe is provided.

According to an embodiment of the present invention, it is possible to freely adjust the length of the standing tube in response to the depth of burial of the body regardless of the construction site situation by enabling the length adjustment of the standing tube coupled to the upper part of the sewer body. It has the effect of improving convenience and speed.

In addition, by inserting a heat insulating member inside the granular tube, there is an effect of preventing freezing and freezing of the granular tube and the main body by blocking the underground cold air transmitted from the side wall of the granular tube.

In addition, the inner lid for shielding the inside of the standing tube is combined, and the insulating member inserted inside the standing tube maintains a gap with the inner lid and at the same time has a gap holding rod that functions as a handle, and the insulating member has a gap holding rod. It is effective to prevent backflow and ejection of sewage by being supported on the inner lid through.

In addition, the insulating member allows the insulating inner cylinder coupled with the gap holding rod and the insulating outer cylinder to accommodate the insulating inner cylinder to be separated and combined, so that the entire insulating member can be selectively withdrawn or only the insulating inner cylinder can be withdrawn. It has the effect of improving the convenience of cleaning and maintenance inside the body accommodating portion.

In addition, there is an effect of preventing foreign matters from leaking by filtering a foreign matter by combining a strainer at the inlet of the outlet pipe, and either or both of the inlet pipe and the outlet pipe is provided with a bellows type connecting member connecting the connecting pipe to the ground. When the settlement occurs, the flow of the connection pipe is made possible, thereby reducing the impact of the body and preventing the connection pipe from being damaged or damaged.

1 is an external perspective view showing a sewer with adjustable length of a standing tube according to an embodiment of the present invention.
Figure 2 is an exploded cross-sectional view for explaining the structure of the standing tube in the sewer receiving the length adjustment of the standing tube according to an embodiment of the present invention.
Figure 3 (a), (b) is a cross-sectional view for explaining the length adjustment of the standing tube in the sewer that can adjust the length of the standing tube according to an embodiment of the present invention.
Figure 4 is an exploded perspective view showing a disassembled sewage pipe capable of adjusting the length of the standing tube according to an embodiment of the present invention.
Figure 5 is a cross-sectional view of a sewer receiving the length adjustment of the standing tube according to an embodiment of the present invention.
Figure 6 is an enlarged cross-sectional view of a main portion for explaining the structure of the inner lid in the sewer with adjustable length of the standing tube according to an embodiment of the present invention.

The following detailed description of the present invention is an embodiment in which the present invention may be practiced and reference is made to the accompanying drawings shown as examples of the embodiment. These embodiments are described in detail so that those skilled in the art are sufficient to practice the present invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, specific shapes, structures, and properties described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in relation to one embodiment. It should also be understood that the location or placement of individual components within each described embodiment can be changed without departing from the spirit and scope of the invention.

Therefore, the following detailed description is not intended to be taken in a limiting sense, and the scope of the present invention is limited only by the appended claims, along with all ranges equivalent to those claimed by the claims if appropriately described. In the drawings, similar reference numerals refer to the same or similar functions across various aspects.

The terminology used in the present invention has been selected, while considering the functions in the present invention, general terms that are currently widely used are selected, but this may vary according to the intention or precedent of a person skilled in the art or the appearance of new technologies. Also, in certain cases, some terms are arbitrarily selected by the applicant, and in this case, the meaning of the terms will be described in detail in the description of the applicable invention. Therefore, the term used in the present invention should be defined based on the meaning of the term and the contents of the present invention, rather than a simple term name.

In the present invention, when a certain part “includes” a certain component, it means that the component may further include other components, not to exclude other components, unless otherwise stated. In addition, terms such as “… unit” and “… module” described in the specification mean a unit that processes at least one function or operation, which may be implemented in hardware or software, or a combination of hardware and software.

As shown in Figure 1, the sewage receiving body according to an embodiment of the present invention 100, the standing tube 200, the inner lid 300, the heat insulating member 400, and the gap holding rod 500 ).

First, the main body 100 is an inflow pipe 110 for introducing wastewater, a receiving unit 120 for collecting wastewater flowing into the inflow pipe 110, and an outflow for draining wastewater collected in the receiving unit 120 Includes tube 130. In more detail, the inside of the main body 100 is provided with a receiving portion 120 in the form of a rectangular parallelepiped with an open top, and an inflow pipe 110 communicating with the receiving portion 120 on one side of the receiving portion 120 ) Is provided, the other side of the receiving portion 120 is provided with an outlet pipe 130 communicating with the receiving portion 120.

In addition, an auxiliary inlet pipe 111 is provided on both sides adjacent to the one side and the other side of the receiving portion 120 of the main body 100, and the odor is introduced through the inlet pipe 110 inside the main body 100. A U trap (not shown) is installed to prevent reverse flow and flow into the room, and a fitting pipe 140 for connecting the standing pipe 200 is provided at the top of the main body 100.

Here, the outlet pipe 130 is more than the inlet pipe 110 and the auxiliary inlet pipe 111 so that the wastewater flowing at the same time from the inlet pipe 110 and the auxiliary inlet pipe 111 can be discharged in a short time without stagnation. It is preferably provided with a larger diameter.

The standing pipe 200 is coupled to the joint pipe 140 of the main body. The standing tube 120 functions to extend the receiving portion 120 of the main body 100 close to a manhole cover (not shown) installed on the ground. However, depending on the situation of the construction site, the distance between the manhole cover and the main body 100 buried underground can be changed each time, so the length of the standing tube 200 must be changed accordingly.

Therefore, it is preferable that the granular tube 200 is provided so that the entire length can be increased or decreased.

The standing tube 200 in the present invention is composed of a lower tube 210 coupled to the joint 140 of the main body 100 and an upper tube 220 coupled to the upper part of the lower tube 210, The pipe 210 and the upper pipe 220 are combined to be able to increase and decrease the overall length of the granular pipe 200.

2 and 3, the upright pipe 200 is composed of two pieces of the lower pipe 210 and the upper pipe 220, and the upper portion of the lower pipe 210 and the lower portion of the upper pipe 220 are An arm and a couple of fastening parts 230 that are fastened to each other are formed. In addition, the total length of the granular pipe 200 varies according to the coupling depth of the arm formed on the lower pipe 210 and the upper pipe 220 and the couple of fastening portions 230.

That is, as shown in Figure 3 (a), the lower tube 210 and the upper tube 220 formed in the arm, a couple of fastening portions 230 are engaged with each other and are fastened to the end of the granular tube 200 The length becomes the smallest basic state, and as shown in Fig. 3(b), the lower pipe 210 and the upper pipe 220 are fastened to correspond to the distance between the manhole cover and the body 100 buried underground. The overall length of the granular tube 200 is adjusted by adjusting the depth.

In this way, the length of the granular tube 200 can be freely adjusted in response to the depth of buried in the main body 100, thereby eliminating the hassle of cutting and using a long standing corrugated tube in correspondence with the depth of buried in the existing body. It improves the convenience and speed of work.

In addition, an inner lid 300 for shielding the interior of the standing tube 200 is coupled to the upper end of the standing tube 200. A manhole cover (not shown) installed on the ground, that is, a circular cast iron cover is installed on the top of the inner lid 300.

Inside the standing tube 200, an insulating member 400 is inserted to block cold air from the basement, which is transferred from the side wall of the standing tube.

The insulating member 400 is composed of an insulating outer cylinder 410 in which the hollow portion 411 is formed, and an insulating inner cylinder 420 inserted into the hollow portion 411 of the insulating outer cylinder 410, and the insulating outer control ( 410) and the insulating inner cylinder 420 are detachably coupled.

Here, the desorption structure of the outer heat insulating body 410 and the inner heat insulating body 420 is composed of arms and a pair of spiral ribs 412 and 422 that are fastened to each other. That is, a female spiral rib 412 is formed on the inner surface of the hollow portion 411 of the insulating outer cylinder 410, and a male spiral rib 422 is formed on the outer surface of the insulating inner cylinder 420 inserted into the hollow portion 411. It is formed to have a structure in which the outer heat insulating body 410 and the inner heat insulating body 420 are fastened and coupled.

In addition, the outer heat insulating body 410 and the inner heat insulating body 420 are flame-retardant fiber-reinforced plastics (Fiber Reinforced Plastics, FRP), polyethylene (Polyethylene, PE), expanded polystyrene (EPS), extruded polystyrene (Extruded PolyStylene, XPS).

The heat insulating member 400 composed of the heat insulating outer cylinder 410 and the heat insulating inner cylinder 420 is inserted into the interior of the granular tube 200 to block the underground cold air transmitted from the side wall of the granular tube 200. It will prevent freezing of the 100 and U trap (not shown).

In addition, at the center of the upper surface of the inner heat insulating body 420, it functions as a handle of the heat insulating member 400, and at the same time, maintains a gap that functions to maintain a gap with the inner lid 300 so that the heat insulating member 400 does not push upward. Rod 500 is combined.

The gap holding rod 500 is connected to the central portion of the insulating inner cylinder 420 and has a height in contact with the bottom surface of the inner lid 300 coupled to the top of the granular tube 200. That is, the gap holding rod 500 is supported by the inner lid 300 so as to support the heat insulating member 400 so that the heat insulating member 400 does not push upward when the sewage flows back, the heat insulating member 400 is discharged from the sewage. It helps to prevent.

In addition, the outer heat insulating body 410 and the inner heat insulating body 420 are fastened and coupled through the female and male spiral ribs 412 and 422 to prevent the sewage from flowing back between the outer heat insulating body 410 and the inner heat insulating body 420. do.

In addition, the gap holding rod 500 functions as a handle of the heat insulating member 400. For example, it is necessary to withdraw the heat insulating member 400 inserted into the granular tube 200 to the outside for cleaning, such as cleaning the accommodation portion 120 of the main body or replacing the U trap.

At this time, by opening the inner lid 300 coupled to the granule tube 200, and lifting the gap holding rod 500 by hand, the insulating member 400 coupled to the gap holding rod 500 has the granule pipe 200. Is withdrawn from. That is, the gap holding rod 500 facilitates the introduction and withdrawal of the heat insulating member 400.

In addition, the gap holding rod 500 is coupled to the insulating inner cylinder 420, which is an insulating member, and the insulating inner cylinder 420 has a detachable fastening coupling structure with the insulating outer cylinder 410, so that the insulating outer cylinder 410 Insulating inner tube 420 may be separated from the hollow portion 411. That is, when holding the gap holding rod 500 and rotating in one direction, the fastening of the insulating outer cylinder 410 and the insulating inner cylinder 420 is released, so that only the insulating inner cylinder 420 can be pulled out. In addition, the inside of the main body accommodating portion 120 can be checked or cleaned through the hollow portion 411 of the outer heat insulating body 410.

As described above, if necessary, the entire insulation member 400 is not drawn out to the outside, and only the inner tube 420 is taken out to allow simple confirmation or work, thereby improving the ease of work and convenience of maintenance.

In addition to this, the inner wall of the lower pipe 210 of the granular pipe 200 is provided with a stepped portion 210 protruding from the inner wall so as to support the lower end of the insulating member 400, in particular, the lower end of the insulating outer cylinder 410. .

The stepped 210 of the inner wall of the lower pipe 210 of the standing tube 200 supports the lower end of the insulating member 400 so that the insulating member 400 can be stably seated inside the standing tube 200.

In addition to this, a C-shaped elastic ring 600 that is in close contact with the inner wall of the granular tube 200 by tension force to restrain the insulating member 200 is mounted on the upper portion of the insulating member 400.

The C-shaped elastic ring 600 is inserted into the interior of the granular tube 200 in a contracted state, and is insulated member 400 located close to the inner wall of the granular tube 200 by the tension force restored after insertion. ) Plays a role of supporting not to be pushed upward. That is, by supporting the insulating member 400 so as not to be pushed upward when the sewage is reversed, such as the gap holding rod 500, the insulating member 400 helps to prevent the discharge of sewage from the interior of the granular pipe 200 Do it.

And, in response to the buried depth of the main body 100, by adjusting the fastening depth of the lower pipe 210 and the upper pipe 220 of the granular pipe 200, when the overall length of the granular pipe 200 is lengthened, the external insulation body By adjusting the degree of fastening between the 410 and the inner heat insulating body 420, the gap holding rod 500 can be supported on the inner lid 300. That is, it is possible to adjust the length of the heat insulating member 400 corresponding to the entire length of the standing tube 200.

On the other hand, as shown in Figure 6, the outer surface of the inner lid 300 coupled to the upper end of the granular tube 200 is sealed to the inside of the granular tube 200 to prevent the stench eradication and the introduction of foreign substances rubber ring ( 310) is fastened.

And, the bottom surface of the inner lid 300 is coupled with a heat insulating plate 320 to block cold air.

At this time, the insulating plate 320 may be coupled to the bottom surface of the inner lid 300 by various bonding methods, but one embodiment of the present invention is to protrude the ribs 330 at a predetermined interval on the bottom surface of the inner lid 300 It is provided and has an embodiment in which the insulating plate 320 is fixed to the bottom surface of the inner lid 300 so as not to be separated from the inner lid 300 by being embedded in the rib 330 protruding from the lower surface of the inner lid.

In addition to this, a filter screen 700 for filtering foreign substances is coupled to the inlet of the outlet pipe 130. The filtering net 700 filters out large-sized ones of foreign matters contained in the sewage to suppress the outflow of foreign matters and prevents the connection pipe 900 connected to the outflow pipe 130 from being blocked.

In addition, a bellows type connecting member 800 connecting the connecting pipe 900 is coupled to any one or both selected from the inlet pipe 110 and the outlet pipe 130 of the main body.

The bellows-type connecting member 800 secures the fluidity of the connecting pipe 900 coupled to the inlet pipe 110 and the outlet pipe 130 to alleviate the impact applied to the body 100 when ground subsidence occurs, Prevents damage or damage to the connector (900).

As described above, the present invention allows the length of the standing pipe to be coupled to the upper part of the body of the sewer to be freely adjustable in length in response to the depth of embedment of the body, regardless of the construction site, so that it is convenient and quick to work. Will improve.

In addition, by inserting a heat insulating member inside the granular tube to prevent freezing and freezing of the granular tube and the main body by blocking the underground cold air transmitted from the side wall.

In addition, the inner lid for shielding the inside of the standing tube is combined, and the insulating member inserted inside the standing tube maintains a gap with the inner lid and at the same time has a gap holding rod that functions as a handle, and the insulating member has a gap holding rod. By being supported on the inner lid through, it prevents the backflow and ejection of sewage.

In addition, the insulating member allows the insulating inner cylinder coupled with the gap holding rod and the insulating outer cylinder to accommodate the insulating inner cylinder to be separated and combined, so that the entire insulating member can be selectively withdrawn or only the insulating inner cylinder can be withdrawn. The convenience of cleaning and maintenance inside the body accommodating portion is improved.

In addition, a filter screen is coupled to the inlet of the outlet pipe to prevent foreign substances from flowing out, and either or both of the inlet pipe and the outlet pipe are equipped with a bellows-type connecting member connecting the connecting pipe to cause ground subsidence. When it is possible, the flow of the connecting pipe is made possible, so that it is possible to prevent shock of the main body and damage or damage of the connecting pipe.

Although preferred embodiments of the present invention have been described above, the present invention is not limited to the specific embodiments described above. That is, a person having ordinary knowledge in the technical field to which the present invention pertains can make a number of changes and modifications to the present invention without departing from the spirit and scope of the appended claims, and all such appropriate changes and modifications It should be considered equivalent to belong to the scope of the present invention.

100: body 110: inlet pipe
120: receiving unit 130: outlet pipe
140: joint 200: figurine
210: lower tube 220: upper tube
230: fastening part 240: stepped
300: inner lid 310: rubber ring
320: insulation plate 330: rib
400: heat insulating member 410: outer heat insulating body
411: hollow 412: female spiral rib
420: Insulating inner cylinder 422: Male spiral rib
500: gap holding rod 600: elastic ring
700: strainer 800: bellows-type connecting member
900: connector

Claims (10)

A main body having an inlet pipe for introducing sewage, a receiving portion for collecting wastewater flowing into the inlet pipe, and an outlet pipe for discharging sewage collected in the receiving portion; Included in the upper portion of the main body coupled to the upper portion of the manhole cover installed on the ground to extend the receiving portion;
The granular pipe is divided into a lower pipe coupled to the upper portion of the main body and an upper pipe coupled to the upper portion of the lower pipe, and a pair of male and female coupling portions are formed at the upper end portion of the lower pipe and the lower end portion of the upper pipe. Characterized in that the length of the standing tube is changed according to the fastening depth of the fastening part,
In the interior of the granular tube, an insulating member is inserted to block the cold air from the basement wall, which is transmitted from the side wall of the granular tube. It is characterized in that the length can be adjusted to correspond to the total length of the granular tube by adjusting the degree of fastening between the insulating outer tube and the inner insulating tube when the overall length of the upright tube is configured.
A C-shaped elastic ring that is in close contact with the inner wall of the granular tube with a tension force to restrain the insulating member from being pushed to the upper portion of the insulating member is mounted on the upper portion of the insulating member. It is characterized in that a gap-holding rod is coupled to support the insulation member so as to block the sewage from which the heat-insulating member flows back when the wastewater is reversed by functioning to maintain a gap so that the insulation member does not push upward.
It characterized in that the upper lid of the standing tube is combined with an inner lid that shields the inside, and an insulating plate that blocks cold air is coupled to the bottom surface of the inner lid,
A filter tube for filtering foreign substances is coupled to the inlet pipe outlet of the main body, and a bellows-type connecting member connecting the connecting pipe is provided at one or both of the inlet pipe and the outlet pipe of the main body. A sewer with adjustable length. delete delete delete delete delete delete delete delete delete

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