CN104452815B - Plastics step-down inspection chamber - Google Patents

Abstract

The present invention discloses a kind of underground water, gas of reducing to the plastics step-down inspection chamber of inspection chamber base pressure. The reinforced wall section that this inspection chamber comprises pit shaft, be positioned at the pit shaft bellmouth on pit shaft top, the tube faucet that is arranged in pit shaft side wall and pit shaft side wall extend wellbore bottom; Described reinforced wall section is provided with at least one relief hole, and described relief hole is through hole. Pressure bottom this inspection chamber can be discharged from the side of inspection chamber by underground water, gas by set relief hole, avoid inspection chamber to be subject to pressure to damage or upwards float and wash away to banket and cause landslide, it is to increase the work-ing life of this plastic inspection well.

Description

Plastic decompression inspection well

technical field

The invention belongs to the field of water supply and drainage, and in particular relates to a plastic pressure-reducing inspection well.

Background technique

Inspection wells are vertical shafts installed at certain distances or at a certain point in underground pipelines. Inspection wells are generally located at the turns, junctions, pipe diameter or slope changes of drainage pipes, cable pipes, etc., and at intervals on straight pipe sections. A certain distance and the water drop of the drainage pipe. The inspection well is an auxiliary structure used to repair pipelines, remove sludge and connect pipelines in different directions and heights. Specifically, there are sewage inspection wells, street inspection wells, sediment inspection wells, water separation inspection wells, electric power inspection wells, telecommunications inspection wells, pipeline valve inspection wells, etc. Plastic inspection wells have the advantages of light weight, corrosion resistance, aging resistance, convenient connection with plastic pipes, high construction efficiency, and low construction cost. Therefore, plastic inspection wells have replaced traditional inspection wells and have been widely used.

At present, the plastic inspection well mainly includes the wellbore, the wellbore socket located at the top of the wellbore, and the branch pipe socket arranged on the side wall of the wellbore; generally, there are one to four branch pipe sockets. In order to ensure the strength of the plastic inspection well, the lower end of the wellbore side wall is usually will extend beyond the bottom of the wellbore. After the existing plastic inspection well is installed, the bottom of the inspection well is under the pressure of groundwater and gas; especially when the groundwater level rises, the pressure at the bottom of the inspection well is particularly serious. When the groundwater buoyancy and air pressure increase to a certain extent, the inspection well will be damaged by pressure or the inspection well will float upwards to wash away the fill and cause landslides.

Contents of the invention

The technical problem to be solved by the present invention is to provide a plastic depressurization inspection well that reduces the pressure of groundwater and gas on the bottom of the inspection well.

In order to solve the above technical problems, the present invention provides a plastic depressurization inspection well, which includes a wellbore, a wellbore socket located at the top of the wellbore, a branch pipe socket arranged on the sidewall of the wellbore, and a reinforcement wall extending from the sidewall of the wellbore to the bottom of the wellbore section; the reinforced wall section is provided with at least one pressure relief hole, and the pressure relief hole is a through hole.

Further, there are at least two pressure relief holes, which are uniformly distributed along the circumference of the reinforced wall section.

Further, at least one annular reinforcing rib is provided on the outer wall of the wellbore socket and/or branch pipe socket.

Further, chamfers are provided at the interface of the inner surface of the wellbore socket and the branch pipe socket.

Further, the inner wall of the wellbore socket is provided with a wellbore annular platform, and the lower side of the outer wall of the wellbore socket corresponding to the wellbore annular platform is provided with triangular support ribs.

Further, the inner wall of the branch pipe socket is provided with a branch pipe annular platform, and the outer wall of the branch pipe socket is provided with a ring-shaped reinforcing rib corresponding to the branch pipe annular platform.

Further, the outer wall of the wellbore is provided with web-shaped reinforcing ribs, and the lower side of the bottom of the wellbore is provided with cobweb-shaped reinforcing ribs formed by interlacing radial reinforcing ribs and ring-shaped reinforcing ribs.

Further, there are at least three branch pipe sockets, one of which is an outflow port, and the rest of the branch pipe sockets are inlets; the bottom of the shaft is provided with a ridge structure, and the ridge structure divides the bottom of the shaft into At least two smooth structures along the water surface, the ridge structure can separate and guide the water flowing in from the inlet, and the water along the structure can guide the water flowing in from the inlet to the outlet.

Further, there are three branch pipe sockets, and the three branch pipe sockets are respectively arranged on the side wall of the wellbore to form a T-shaped three-way inspection well; wherein, the two correspondingly arranged branch pipe sockets are confluence ports, and the other A branch pipe socket is an outlet; the spine structure is a herringbone spine, and the herringbone spine divides the bottom of the wellbore into three structures along the water surface, and the three structures along the water surface are respectively a downstream surface and two diversion surfaces; The downstream surface is a fan-shaped arc surface, and the diversion direction of the downstream surface faces the branch pipe socket as the outlet; the diversion surface is an arc surface, and the diversion inlets of the two diversion surfaces are respectively directed A branch pipe socket as the inlet, and the diversion outlets of the two diversion surfaces are all facing the branch pipe socket as the outflow port.

Further, a smooth transition structure is provided at the intersecting line connecting the branch pipe socket and the wellbore side wall, and the smooth transition structure includes an outer circular arc chamfer and an inner circular arc chamfer.

The beneficial effects of the present invention are: the pressure of groundwater and gas on the bottom of the inspection well can be discharged from the side of the inspection well through the set pressure relief hole, so as to avoid the pressure damage of the inspection well or the collapse of the filling soil caused by the upward floating, and improve the quality of the inspection well. The service life of the plastic inspection well has been greatly improved. A plurality of pressure relief holes uniformly distributed along the circumference of the reinforced wall section can discharge the pressure at the bottom of the inspection well from around the inspection well, and the pressure relief effect is better. The annular reinforcing rib can improve the strength of the inspection well, increase the ring stiffness of the wellbore socket and the branch pipe socket, avoid excessive thickness of the side wall of the inspection well, and save costs. The chamfer on the wellbore socket can facilitate the connection of the pipeline connected with the wellbore socket, and the chamfer on the branch pipe socket can facilitate the connection between the branch pipe socket and other pipelines. The annular platform of the wellbore improves the stability and airtightness of the wellbore, and the triangular support ribs strengthen the structure of the wellbore. The annular platform of the branch pipe increases the stability and airtightness of the branch pipe socket. The web-like ribs and spider web-like ribs not only increase the strength of the inspection well, but also enhance the ability of the inspection well to resist extrusion and deformation by external forces. The set spine structure can separate and guide the water body entering from the inlet when there are more than three branch pipe sockets, and guide the water body to the outlet with lower energy consumption through the structure along the water surface, so that the water flow can be better converged , to ensure the direction and velocity of the water flow, to avoid the generation of turbulence or swirl. The herringbone-shaped spine has a better water diversion and guiding effect, and the downstream surface can also guide the water entering from the wellbore socket. The smooth transition structure can not only improve the strength between the branch pipe socket and the wellbore connection; moreover, it is convenient for the cleaning tool to enter the inspection well for dredging during dredging.

Description of drawings

Fig. 1 is a schematic diagram of a half-section structure of an embodiment of the present invention;

Fig. 2 is a schematic top view of the embodiment of Fig. 1;

Fig. 3 is a top view structural schematic diagram of another embodiment of the present invention;

Fig. 4 is an axial side view of the bottom structure of the inspection well in the embodiment of Fig. 1;

The marks in the figure are: shaft 1, herringbone ridge 11, downstream surface 12, diversion surface 13, diversion inlet 131, diversion outlet 132, shaft socket 2, chamfer 21, shaft annular platform 22, triangular support Rib 23, branch pipe socket 3, chamfer 31, branch pipe annular platform 32, outer arc chamfer 33, inner arc chamfer 34, reinforced wall section 4, pressure relief hole 41, annular reinforcing rib 5, mesh Reinforcing rib 6 and cobweb-shaped reinforcing rib 7.

detailed description

The present invention will be further described below in conjunction with accompanying drawing.

As shown in Figures 1 and 4, the plastic depressurization inspection well includes a wellbore 1, a wellbore socket 2 located at the top of the wellbore 1, a branch pipe socket 3 arranged on the side wall of the wellbore 1, and the sidewall of the wellbore 1 extending out of the wellbore 1 The reinforced wall section 4 at the bottom; usually one to four branch pipe sockets 3 are provided; at least one pressure relief hole 41 is provided on the reinforced wall section 4, and the pressure relief hole 41 is a through hole. The reinforced wall section 4 is a reinforced structure extending from the bottom of the shaft 1 to ensure the overall strength of the shaft 1 . The pressure relief hole 41 is a through hole provided on the reinforced wall section 4, and is used to discharge the pressure of groundwater and gas on the bottom of the inspection well from the side of the inspection well. The pressure relief hole 41 should not be too large or too many, so as not to affect the structural strength of the reinforced wall section 4, resulting in a decrease in the overall strength of the wellbore 1; On the premise, the size of the pressure relief holes 41 is as large as possible, and the number of pressure relief holes 41 is as large as possible. The pressure relief hole 41 is usually arranged on the circumferential surface of the reinforced wall section 4 near the bottom of the wellbore 1, so that the effect of pressure reduction can be improved. In order to prevent the pressure relief hole 41 from being blocked by soil, stones, etc., generally a filter is provided on the side wall of the shaft 1 at the pressure relief hole 41 .

In order to discharge the pressure at the bottom of the inspection well from the surroundings of the inspection well, so that the reaction forces received when the inspection well discharges pressure to the outside cancel each other out, thereby receiving a smaller reaction force and improving the pressure discharge effect, the pressure relief hole 41 is at least There are two, and they are evenly distributed along the circumference of the reinforced wall section 4 .

On the basis of the above, in order to further improve the strength of the inspection well under the condition that the side wall thickness of the inspection well is constant, and increase the ring stiffness of the wellbore socket 2 and/or the branch pipe socket 3, the wellbore socket 2 and/or At least one annular reinforcing rib 5 is provided on the outer wall of the branch pipe socket 3 . The number of ring-shaped reinforcing ribs 5 provided should be appropriate under the condition of ensuring the strength. For example, in the scheme of FIG.

In order to facilitate the connection of the pipeline connected to the wellbore socket 2, a chamfer 21 is provided at the interface of the inner surface of the wellbore socket 2; A chamfer 31 is provided at the interface.

Specifically, as shown in Figure 1, in order to improve the stability and tightness of the shaft 1, the inner wall of the shaft socket 2 is provided with a shaft annular platform 22; in order to strengthen the structure of the shaft 1 at the shaft annular platform 22 , Triangular support ribs 23 are provided on the lower side of the outer wall of the wellbore socket 2 corresponding to the wellbore annular platform 22 . The wellbore annular platform 22 is an annular platform. There are usually more than two triangular support ribs 23 , and they are evenly distributed along the circumference of the shaft 1 .

Specifically, as shown in Figure 1, in order to improve the stability and airtightness of the branch pipe socket 3, the inner wall of the branch pipe socket 3 is provided with a branch pipe annular platform 32, and the branch pipe annular platform 32 is a circular platform; In order to strengthen the structure of the branch pipe socket 3 at the branch pipe annular platform 32 , an annular reinforcing rib 5 is provided on the outer wall of the branch pipe socket 3 corresponding to the branch pipe annular platform 32 .

In order to further improve the strength of the inspection well and at the same time enhance the ability of the inspection well to resist extrusion and deformation by external force, as shown in Figure 1 and Figure 4, the outer wall of the shaft 1 is provided with a mesh reinforcing rib 6, and the lower part of the bottom of the shaft 1 The side surface is provided with a cobweb-shaped reinforcing rib 7 formed by interlacing radial reinforcing ribs and annular reinforcing ribs.

As a preferred solution of the present invention, as specifically shown in Figure 2 and Figure 3, the plastic depressurization inspection well includes a wellbore 1, a wellbore socket 2 located at the top of the wellbore 1, and a branch pipe socket arranged on the side wall of the wellbore 1 3 and the reinforced wall section 4 extending from the side wall of the wellbore 1 to the bottom of the wellbore 1; the reinforced wall section 4 is provided with at least one pressure relief hole 41, and the pressure relief hole 41 is a through hole; the branch pipe socket 3 is at least There are three, wherein one branch pipe socket 3 is an outflow port, and the remaining branch pipe sockets 3 are inlets; the bottom of the wellbore 1 is provided with a ridge structure, and the ridge structure divides the bottom of the wellbore 1 into at least two smooth parallel The water surface structure, the ridge structure can separate and guide the water flowing in from the inlet, and the water surface structure can guide the water flowing in from the inlet to the outlet. The spine structure is usually injection molded. The set spine structure can separate and guide the water body entering from the inlet when there are more than three branch pipe sockets, so that the flow direction of the water body in the wellbore 1 is all towards the outlet, so that the water flow can be better merged and the direction of the water flow is guaranteed. ; While the spine structure separates and guides the water body, the structure along the water surface guides the water body to the outlet with low energy consumption. After the smooth water surface structure diversion, the kinetic energy consumption of the water body is less, and the flow velocity of the water body remains basically unchanged. . The inspection well of this structure can avoid turbulence or swirling flow in the shaft 1 due to the confluence of water bodies when there are more than three branch pipe sockets, ensures timely discharge of water bodies, and is convenient for sewage discharge and later cleaning.

On the basis of the above, as shown in Figure 2, there are three branch pipe sockets 3, and the three branch pipe sockets 3 are respectively arranged on the side wall of the shaft 1 to form a T-shaped three-way inspection well; The branch pipe socket 3 provided correspondingly is the inlet, and the other branch pipe socket 3 is the outflow port; the ridge structure is a herringbone ridge 11, and the chevron ridge 11 divides the bottom of the shaft 1 into three structures along the water surface. The structure of the downstream surface is respectively a downstream surface 12 and two diversion surfaces 13; the downstream surface 12 is a fan-shaped arc surface, and the diversion direction of the downstream surface 12 faces the branch pipe socket 3 as the outlet; The diversion surface 13 is an arc-shaped surface, and the diversion inlets 131 of the two diversion surfaces 13 are respectively facing the two branch pipe sockets 3 as inlets, and the diversion outlets 132 of the two diversion surfaces 13 are all facing as the outlets. The branch pipe socket 3. The herringbone ridge 11 has a better effect of water diversion and guidance, and the downstream surface 12 can also guide the water entering from the shaft socket 2 .

In order to improve the strength between the connection between the branch pipe socket 3 and the wellbore 1, a smooth transition structure is provided at the intersecting line connecting the branch pipe socket 3 and the side wall of the wellbore 1, and the smooth transition structure includes inner arc chamfering 33 and outer arc chamfering 34, as shown in Figure 1. The smooth transition structure also facilitates dredging when the cleaning tool enters the inspection well.

Claims (8)

1. Plastic depressurization inspection well, including the wellbore (1), the wellbore socket (2) at the top of the wellbore (1), the branch pipe socket (3) arranged on the side wall of the wellbore (1) and the wellbore (1) side The wall extends out of the reinforced wall section (4) at the bottom of the shaft (1); it is characterized in that: the reinforced wall section (4) is provided with at least one pressure relief hole (41), and the pressure relief hole (41) is through holes; there are three branch pipe sockets (3), and the three branch pipe sockets (3) are respectively arranged on the side wall of the shaft (1) to form a T-shaped three-way inspection well; wherein, two correspondingly arranged branch pipes The socket (3) is the inlet, and the other branch socket (3) is the outlet; The bottom of the wellbore (1) is provided with a spine structure, the spine structure is a herringbone spine (11), and the herringbone spine (11) divides the bottom of the wellbore (1) into three smooth structures along the water surface. The water surface structure is respectively a downstream surface (12) and two diversion surfaces (13); The branch pipe socket (3); the diversion surface (13) is an arc surface, and the diversion inlets (131) of the two diversion surfaces (13) are respectively facing two branch pipe sockets (3) as inlets , the diversion outlets (132) of the two diversion surfaces (13) are all facing the branch pipe socket (3) as the outlet; Divert the water flowing in from the inlet to the outlet. 2. The plastic depressurization inspection well according to claim 1, characterized in that: there are at least two pressure relief holes (41), which are evenly distributed along the circumference of the reinforced wall section (4). 3. The plastic depressurization inspection well according to claim 1, characterized in that: at least one annular reinforcing rib (5 ). 4. The plastic depressurization inspection well according to claim 1, characterized in that chamfers (21, 31) are provided at the interface of the inner surfaces of the wellbore socket (2) and the branch pipe socket (3). 5. The plastic depressurization inspection well according to claim 1, characterized in that: the inner wall of the wellbore socket (2) is provided with a wellbore annular platform (22), and the outer wall of the wellbore socket (2) is in contact with Triangular support ribs (23) are arranged on the lower side of the shaft annular platform (22) corresponding to it. 6. The plastic depressurization inspection well according to claim 1, characterized in that: the inner wall of the branch pipe socket (3) is provided with a branch pipe annular platform (32), and the outer wall of the branch pipe socket (3) is A ring-shaped reinforcing rib (5) is provided at a position corresponding to the ring-shaped platform (32) of the branch pipe. 7. The plastic depressurization inspection well according to claim 1, characterized in that: the outer wall of the wellbore (1) is provided with mesh reinforcing ribs (6), and the lower side of the bottom of the wellbore (1) is provided with A cobweb-shaped reinforcing rib (7) formed by interlacing radial reinforcing ribs and annular reinforcing ribs. 8. The plastic pressure-relief inspection well according to claim 1, 2, 3, 4, 5, 6 or 7, characterized in that: said branch pipe socket (3) is connected to the side wall of the wellbore (1) A smooth transition structure is provided at the crossing line, and the smooth transition structure includes an outer circular arc chamfer (33) and an inner circular arc chamfer (34).