CN209651888U - The double-deck emptying hand hole well - Google Patents

Abstract

The utility model relates to a kind of double-deck emptying hand hole wells, including oil drain valve, anti-overflow cylinder, support base and protection cylinder, the support base is equipped with interconnected upper end connector and lower end connector, the oil drain valve lower end is plugged on end connector, oil drain valve upper end is fixedly connected with blanking cover, the oil drain valve is placed in the inside of anti-overflow cylinder, and support base is fixedly connected with the lower end of anti-overflow cylinder, the upper end of the anti-overflow cylinder is fixedly connected with well lid, the protection cylinder is sheathed on the outside of anti-overflow cylinder, and the upper end is fixedly connected with anti-overflow cylinder, there is through-hole to pass through for pipe joint for the bottom of the protection cylinder, the top and bottom joint sealing of the pipe joint connects, the bottom of protection cylinder is stretched out for connecting external pipe in its lower end.The utility model uses Double-protection, avoids the components such as metal support base and connector thereon and is directly embedded to underground, avoids pipe joint junction and damaged by groundwater erosion.

Description

The double-deck emptying hand hole well

Technical field

The utility model relates to hand hole wells, and in particular to a kind of double-deck emptying hand hole well for gas station.

Background technique

The oil product supply of gas station is all to enter underground oil storage oil tank by emptying hand hole well stream, the frequent supply pair of gas station The reliability and stability of emptying hand hole well proposes challenge, it is desirable that the interior fittings of emptying hand hole well have good replacement Property.In order to avoid the fuel oil of gas station permeates the ground soil or a large amount of oil gas volatilizations escape and cause environmental pollution, to unloading The closed type of oily hand hole well proposes higher requirement: all flanges and nipple junction do not allow directly buried, prevent Only joint leaks contaminated soil in turn because corrosion causes oil product.In addition, the buried depth of gas station's underground oil storage oil tank is limited, Unloading pipe must have certain gradient again, so as to emptying after be unlikely to residual fuel oil product in unloading pipe.

Emptying hand hole well used in gas station is mostly single layer structure at present, during the installation process, the metal knot used Component and metal joint be directly be embedded in underground, therefore be easy to there is a situation where oil product from joint penetrate into soil, and And these metalworks are also easy to be destroyed by groundwater erosion.Therefore how to solve the above problems and have become working as the industry It is engaged in anxious.

Utility model content

In order to overcome drawbacks described above, the utility model provides a kind of double-deck emptying hand hole well, on the basis of conventional monolayers Increase one layer of protective layer, so that all metalworks is mutually isolated with soil, avoid groundwater erosion metalwork and Oil product penetrates into the phenomenon that soil.

The utility model is to solve technical solution used by its technical problem:

A kind of bilayer emptying hand hole well, including oil drain valve, anti-overflow cylinder, support base and protection cylinder, on the support base Equipped with interconnected upper end connector and lower end connector, the oil drain valve lower end is plugged on end connector, and oil drain valve upper end is solid Surely blanking cover is connected, which is placed in the inside of anti-overflow cylinder, and support base is fixedly connected with the lower end of anti-overflow cylinder, described anti- The upper end of excessive cylinder is fixedly connected with well lid, and the protection cylinder is sheathed on the outside of anti-overflow cylinder, and the upper end and anti-overflow cylinder It is fixedly connected, there is through-hole to pass through for pipe joint for the bottom of the protection cylinder, and the top and bottom connector of the pipe joint is close The bottom of protection cylinder is stretched out for connecting external pipe in envelope connection, lower end.

Preferably, antiseepage sensor is equipped in the protection cylinder body at bottom, the cable of the antiseepage sensor passes through The threading pipeline for being arranged in protection cylinder lateral wall is connect with antiseepage sensor, is passed through between threaded pipeline and protection cylinder lateral wall Conduit seals are tightly connected.

Preferably, the anti-overflow cylinder upper end forms upper edge with extending radially outwardly, and lower end extends radially inwardly ground Lower edge is formed, the lower edge is fixedly connected with support base, and is equipped with sealing ring between the two, and the upper edge is equipped with a circle Internal thread hole and a circle outside threaded holes, are fixed on top for well lid by the outside threaded holes that bolt is arranged in well lid and upper edge The upside on edge.

Preferably, the protection cylinder upper end forms interconnecting piece with extending radially outwardly, and is arranged on this by bolt Interconnecting piece and the internal thread hole of upper edge and cylinder will be protected to be fixed on the downside of upper edge, the top of the protection cylinder is divided into Hollow cylindrical structure, lower part are divided into hollow polyhedral structure, and the threading pipeline is fixedly connected on polyhedral structure On either side.

Preferably, the support base is equipped with draining valve, which is fixed on support base by pressing plate, the oil extraction Valve inside pipeline and lower end connector by being connected.

Preferably, the top and bottom connector of the pipe joint is mutually inserted, and the upper end of the pipe joint is grafting Portion is equipped with boss in the lower section of plug division, and the outside of the plug division is enclosed seal groove at least provided with one, is equipped in the seal groove Radial direction seal ring, the boss are arranged a circle axial sealing ring, the inner sidewall top of the lower end connector close to the side of cartridge part Tightly axial sealing ring is squeezed and deformed close to the side of cartridge part in the boss, the lower end connector inner sidewall connects with cartridge part Contacting surface is inclined-plane, and the boss is equipped with multiple threaded holes, passes through support base and threaded hole by connection bolt and connects pipeline Head is bolted in support base.

Preferably, the oil drain valve includes valve body tube and the spool that is placed in valve body tube, and one end of the valve body tube is fixed Quick coupling is connected, the other end is installed with pick-and-place components, and the pick-and-place components and valve body tube are integrally formed part, on the outside of the pick-and-place components At least provided with a circle seal groove, it is equipped with radial direction seal ring in the seal groove, the spool is fixedly connected with spool drive rod, the valve Spool spanner is fixedly connected on the outside of core drive rod, the spool spanner controls institute by spool drive rod rotary spool, the spool State the fluid flow in valve body tube.

Preferably, the spool spanner is in Zhong≤45 ° angle Shi in opening-closing process between the central axis of valve body tube, The spool is spherical valve core, and valve core seal ring, one end of the quick coupling and valve are equipped between the spool and valve body tube Body pipe screw thread is fixedly connected, and the other end connects blanking cover, and its outside is equipped with a circle groove.

Preferably, the valve body tube radially extended outward to form at pick-and-place components a circle protrusion, it is described protrusion on Equipped with multiple threaded holes, it is equipped with lock-screw in the threaded hole, by lock-screw rapidly by valve body tube and upper end connector Mutually it is spirally connected.

Preferably, the protrusion is arranged a circle axial sealing ring, the inside of the upper end connector close to the side of pick-and-place components Wall holds out against the side in the protrusion close to pick-and-place components and is squeezed and deformed axial sealing ring, the upper end connector inner sidewall and inserting Part contact surface is inclined-plane.

The beneficial effects of the utility model are:

1) the utility model is also arranged one layer of protection cylinder in the outside of anti-overflow cylinder, and support base is placed in protection cylinder Interior, corrosion resistant composite material such as aluminum plastic composite pipe, steel-plastics composite pipe, steel can be used in the pipe joint uniquely contacted with soil Skeleton pipe etc., therefore the utility model uses Double-protection, and it is straight to avoid the components such as metal support base and connector thereon Embedment underground is connect, both can prevent fuel oil from directly penetrating into soil from the junction of support base and pipe joint, and also avoid pipe Road joint is damaged by groundwater erosion；

2) cavity protected between cylinder body bottom and support base in the utility model is oil trap, is arranged in oil trap anti- Sensor is seeped, just in case oil product leaks, the antiseepage sensor being arranged in oil trap perceives and trigger sending alarm signal, prison Control personnel will detect and repair to this hand hole well at the first time, set one of barrier thus to oil product leakage more, prevent oil The case where product further leak out to soil, cause environmental pollution generation；

3) pipe joint in the utility model is plugged and fixed by the way of inserting with support base, O-shaped close by multiple tracks Seal (one of axial sealing ring, twice radial direction seal ring) carries out radial and axial sealing, and by lower end connector inner sidewall with Pipe joint contact surface is designed as 45 ° of inclined-plane, when installation this inclined-plane squeeze axial sealing ring deformation and by the two axial seal, Compared to the mode that traditional thread locking adhesive is fixedly connected, there are demolition, installation conveniently, high sealing reliability, more convenient for the later period It changes and the advantages that maintenance；

4) oil drain valve in the utility model is compared with traditional oil drain valve, by traditional top screw thread adapter and fastly Quick coupling is combined into one, and substitutes lower thread adapter with plug connector, and plug connector and valve body tube are combined into one, therefore reduce The number of part, reduces the material and assembly cost of product, simplifies assembly process, and reduce between two parts Screw assembly, avoid the hidden danger that seal with screwed joint at two is failed；

5) oil drain valve in the utility model is plugged and fixed by the way of inserting with support base, passes through the O-shaped sealing of multiple tracks It encloses (one of axial sealing ring, twice radial direction seal ring) and carries out radial and axial sealing, and by upper end connector inner sidewall and insert Piece installing contact surface is designed as 45 ° of inclined-plane, this inclined-plane squeezes axial sealing ring deformation for the two axial seal when installation, compares In the mode that traditional sealant is fixedly connected, there are demolition, installation conveniently, high sealing reliability, convenient for the replacement and maintenance in later period The advantages that maintenance, and can directly be replaced if later period oil drain valve breaks down, save resource；

6) structure of oil drain valve's entirety in the utility model is more compact, before not reducing oil drain valve's sealing performance It puts, substantially compresses its whole height, while the opening and closing range of the spool spanner of oil drain valve is designed as ± 45 ° and (is different from Common 0-90 °), i.e. angle of the range of spool spanner opening and closing between handle and valve body is substantially reduced from -45 ° to+45 ° The occupied space of oil drain valve's entirety, thus reduce the space of installation, transformation, design and construction convenient for gas station, and can Oil drain valve is assembled rear directly use, the installation workload at scene is significantly reduced, the construction period is shortened, improves The quality of installation.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the perspective view of the utility model；

Fig. 3 is the explosive view of the utility model；

Fig. 4 is support base, oil drain valve and the assembling figure of pipe joint in the utility model；

Fig. 5 is the perspective view of Fig. 4；

Fig. 6 is the perspective view at another visual angle Fig. 4；

Fig. 7 is the structural schematic diagram of support base in the utility model；

Fig. 8 is the structural schematic diagram of oil drain valve in the utility model；

Fig. 9 is the cross-sectional view of oil drain valve in the utility model；

Figure 10 is the explosive view of oil drain valve in the utility model；

Figure 11 is the main view of oil drain valve's closed state in the utility model；

Figure 12 is the cross-sectional view of Figure 11 vertical direction；

Figure 13 is the main view of oil drain valve's half-open position in the utility model；

Figure 14 is the cross-sectional view of Figure 13 vertical direction；

Figure 15 is the main view of oil drain valve's full-gear in the utility model；

Figure 16 is the cross-sectional view of Figure 15 vertical direction；

In figure: 100- oil drain valve, 10- valve body tube, 11- spool, 12- pick-and-place components, 13- axial sealing ring, 14- radial seal Circle, 15- lock-screw, 16- spool drive rod, 17- locking nut, 18- protrusion, 19- valve core seal ring, 20- quick coupling, 21- groove, 30- spool spanner, 31- washer, 40- blanking cover, the anti-overflow cylinder of 50-, the upper edge 51-, the lower edge 52-, 60- support Seat, the upper end connector of 61-, end connector under 62-, 63- draining valve, the inclined-plane 64-, 70- protect cylinder, 71- antiseepage sensor, and 72- is managed Road connector, 73- splice seal, 74- thread pipeline, 75- conduit seals, 76- boss, 80- well lid.

Specific embodiment

Below in conjunction with the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out clear, complete Site preparation description, it is clear that the described embodiments are only a part of the embodiments of the utility model, instead of all the embodiments. Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts Every other embodiment, fall within the protection scope of the utility model.

Embodiment: as illustrated in figs. 1-16, a kind of bilayer emptying hand hole well, including oil drain valve 100, anti-overflow cylinder 50, support Seat 60 and protection cylinder 70, the support base 60 are equipped with interconnected upper end connector 61 and lower end connector 62, the emptying 100 lower end of valve is plugged on end connector 61, and oil drain valve upper end is fixedly connected with blanking cover 40, which is placed in anti-overflow cylinder 50 inside, and support base 60 is fixedly connected with the lower end of anti-overflow cylinder 50, the upper end of the anti-overflow cylinder 50 is fixedly connected with well Lid 80, the protection cylinder 70 is sheathed on the outside of anti-overflow cylinder 50, and the upper end is fixedly connected with anti-overflow cylinder, the protection cylinder There is through-hole to pass through for pipe joint 72 for the bottom of body 70, and the top and bottom connector 62 of the pipe joint 72 is tightly connected, The bottom of protection cylinder is stretched out for connecting external pipe in lower end.The anti-overflow cylinder 50 is cylindrical structure, protects cylinder 70 Top be divided into cylindrical structure, support base 60 is disc-shaped structure, anti-overflow cylinder 50, oil drain valve 100, protection cylinder 70 and Support base 60 is coaxially arranged, is hollow passageway in the center of support base 60, which upwardly extends to form hollow upper termination First 61, it is downwardly extending hollow lower end connector 62, upper end connector and lower end connector internal run-through, 72 lower end of pipe joint It is arranged splice seal 73, is tightly connected the two by conduit seals when external unloading pipe is sheathed on pipe joint, The bottom of the splice seal and protection cylinder is spirally connected.The utility model is mainly used as tank truck and underground when gas station's emptying The switching part of oil tank, i.e. oil product in tank truck enter buried tank by this emptying hand hole well stream, wherein support base 60 is spirally connected In the lower edge of anti-overflow cylinder 52, the pick-and-place components 12 in oil drain valve 100 are directly plugged in the upper end connector 61 of support base, and pass through Lock-screw 15 in protrusion is spirally connected with upper end connector, and the upside of the upper edge 51 of anti-overflow cylinder is spirally connected well lid 80, protects cylinder 70 are placed on the outside of anti-overflow cylinder, and the upper end is bolted in the downside of anti-overflow cylinder upper edge, and pipe joint 72 is from protection cylinder Bottom passes through and seals against each other plug connection with the lower end connector of support base 60, and the utility model uses Double-protection, avoids The components such as metal support base and connector thereon are directly embedded to underground, can both prevent fuel oil from connecing from support base and pipeline Soil is directly penetrated into the junction of head, also avoids pipe joint junction and is damaged by groundwater erosion.

As shown in figures 1 and 3, antiseepage sensor 71, antiseepage sensing are equipped in the protection cylinder 70 at bottom The cable of device, which passes through to be arranged in, protects the threading pipeline 74 of cylinder lateral wall to connect with antiseepage sensor, threaded pipeline 74 and protection It is tightly connected between cylinder lateral wall by conduit seals 75.The conduit seals 75 and the side wall of protection cylinder are spirally connected, and protect Cavity between cylinder body bottom and support base 60 is that oil trap can be gathered in oil trap just in case oil product leaks, then can be by The antiseepage sensor 71 being arranged in oil trap perceives and triggers sending alarm signal, and monitoring personnel will be at the first time to this hand Hole well is detected and is repaired, and is set one of barrier thus to oil product leakage more, is prevented oil product and further leak out to soil, cause ring The case where border is polluted.The support base 60 is equipped with draining valve 63, which is fixed on support base by pressing plate, institute Draining valve 63 is stated by being connected inside pipeline and lower end connector 62.The anti-overflow cylinder can also be used to collect the oil surprisingly overflowed Product, and be discharged into buried tank by draining valve 63 and unloading pipe, avoid the waste of oil product and escape pollution environment.

As shown in Figures 2 and 3,50 upper end of anti-overflow cylinder forms upper edge 51, lower end diameter with extending radially outwardly Lower edge 52 to extending internally is formed, the lower edge 52 is fixedly connected with support base 60, and is equipped with sealing ring between the two, The upper edge 51 is equipped with a circle internal thread hole and a circle outside threaded holes, is arranged in the outer of well lid 80 and upper edge 51 by bolt Threaded hole and the upside that well lid is fixed on to upper edge, wherein well lid is load bearing well cover, and magnesite, stainless steel can be used Matter etc. is configured with load bearing well cover in this hand hole well, substantially unrestricted for the position of installation, is different from traditional hand hole well It has to be installed on except runway.70 upper end of protection cylinder forms interconnecting piece with extending radially outwardly, and passes through bolt The downside for being arranged in interconnecting piece and the internal thread hole of upper edge 51 on this and cylinder being protected to be fixed on upper edge, the protection cylinder The top of body 70 is divided into hollow cylindrical structure, and lower part is divided into hollow polyhedral structure, and the threading pipeline 74 is fixed to be connected It is connected on the either side of polyhedral structure.

As shown in figs. 4-7, the top and bottom connector 62 of the pipe joint 72 is mutually inserted, the pipe joint 72 Upper end is plug division, is equipped with boss 76 in the lower section of plug division, the outside of the plug division is described at least provided with a circle seal groove Radial direction seal ring 14 is equipped in seal groove, the boss 76 is arranged a circle axial sealing ring 13 close to the side of cartridge part, described The inner sidewall of lower end connector 62 holds out against the side in the boss close to cartridge part and is squeezed and deformed axial sealing ring, the lower end Connector inner sidewall and cartridge part contact surface are inclined-plane 64, and the boss 76 is equipped with multiple threaded holes, are passed through by connecting bolt Support base 60 and threaded hole and pipe joint 72 is bolted in support base 60.Inclined-plane 64 squeezes axial sealing ring deformation, passes through axis To the deformation of sealing ring so that lower end connector and cartridge part axial seal, the folder between the inclined-plane and lower 62 horizontal cross-section of end connector Angle is 45 °.The outside of cartridge part is equipped with two circle seal grooves, is equipped with a radial direction seal ring in each seal groove, therefore be equipped with two Radial direction seal ring axial sealing ring with together in road is sealed, and improves the leakproofness between pipe joint 72 and lower end connector 62 Energy.

Such as Fig. 8-10, the oil drain valve 100 includes valve body tube 10 and the spool 11 being placed in valve body tube, the valve body tube 10 One end be fixedly connected with quick coupling 20, the other end is installed with pick-and-place components 12, and the pick-and-place components 12 are integrated into valve body tube 10 Type part, at least provided with a circle seal groove, the seal groove is interior to be equipped with radial direction seal ring 14, the spool in 12 outside of pick-and-place components 11 are fixedly connected with spool drive rod 16, and spool spanner 30 is fixedly connected on the outside of the spool drive rod 16, and the spool spanner passes through Spool drive rod rotary spool 11, the spool control the fluid flow in the valve body tube 10.The spool spanner 30 and spool It is locked between drive rod 16 by locking nut 17, and is equipped with seal washer 31 between locking nut 17 and spool wrench 30. 16 one end of spool drive rod is clamped in spherical valve core, and the other end passes through the mounting hole in valve body tube 10, and passes through locking nut It is fixedly connected with spool spanner 30.20 upper end of quick coupling in oil drain valve connects blanking cover 40, and lower end is spirally connected with valve body tube 10, valve body The pick-and-place components 12 of pipe are plugged in the upper end connector of support base, and traditional top screw thread adapter and quick coupling close in this oil drain valve Two be one, substitutes lower thread adapter with plug connector, and plug connector and valve body tube are combined into one, therefore reduce part Number reduces the material and assembly cost of product, simplifies assembly process, and reduces the dress of the screw thread between two parts Match, avoids the hidden danger that seal with screwed joint is failed at two.

As shown in Figure 7 and Figure 8, the valve body tube 10 radially extends outward to form circle protrusion at pick-and-place components 12 18, described raised 18 are equipped with multiple threaded holes, are equipped with lock-screw 15 in the threaded hole, rapidly by lock-screw 15 Valve body tube and upper end connector 61 are mutually spirally connected.Described raised 18 are arranged a circle axial sealing ring close to the side of pick-and-place components 12 13, the inner sidewall of the upper end connector 61 holds out against the side in the protrusion close to pick-and-place components and is squeezed and deformed axial sealing ring, The upper end connector inner sidewall and pick-and-place components contact surface are inclined-plane 64.Inclined-plane 64 squeezes axial sealing ring deformation, by axial close So that upper end connector and pick-and-place components axial seal, the angle between 61 horizontal cross-section of the inclined-plane and upper end connector is for the deformation of seal 45°.The outside of pick-and-place components is equipped with two circle seal grooves, is equipped with a radial direction seal ring in each seal groove, therefore be equipped with twice diameter To sealing ring, axial sealing ring is sealed with together with, improves the sealing effect of oil drain valve.

As illustrated in figures 11-16, the spool spanner 30 is in the folder in opening-closing process between the central axis of valve body tube 10 Angle Zhong≤45 ° Shi, the spool 11 are spherical valve core, and valve core seal ring 19, institute are equipped between the spool 11 and valve body tube 10 The one end for stating quick coupling 20 is screwed with valve body tube 10 to be connect, and the other end connects blanking cover 40, and its outside is recessed equipped with a circle Slot 21.The opening and closing range of the spool spanner of oil drain valve is designed as ± 45 ° (being different from common 0-90 °), i.e. spool spanner opens Angle of the range closed between handle and valve body is from -45 ° to+45 °, so that the occupancy for greatly reducing oil drain valve's entirety is empty Between.

The operating process of the utility model: when installation: the support base 60 in the utility model is bolted under anti-overflow cylinder Edge 52, the pick-and-place components 12 in oil drain valve 100 are directly plugged in the upper end connector 61 of support base, and pass through the locking screw in protrusion Nail 15 is spirally connected with upper end connector, and the upside of the upper edge 51 of anti-overflow cylinder is spirally connected well lid 80, and cylinder 70 is protected to be placed on anti-overflow cylinder Outside, the upper end is bolted in the downside of anti-overflow cylinder upper edge, pipe joint 72 passed through from the bottom of protection cylinder and with branch The lower end connector of support seat 60 is mutually inserted sealed connection, and the lower end of pipe joint 72 connects the oil discharge pipe in buried tank Road；When emptying, well lid 80 is opened, blanking cover 40 is removed, the offloading joint of unloading hose on tank truck is connected with quick coupling 20 It connects, opens oil drain valve 100, so that the oil product in tank truck flows into buried tank by oil drain valve and unloading pipe, emptying terminates Afterwards, oil drain valve is closed, is accidentally overflowed if any oil product, then the oil product of spilling is discharged into ground by the draining valve 63 opened on support base 60 Lower oil tank, finally loads onto blanking cover 40 and well lid 80.

It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the premise utility, Various modifications and improvements can be made, and these are all within the protection scope of the present invention.Therefore, the utility model patent The scope of protection shall be subject to the appended claims.

Claims (10)

1. a kind of bilayer emptying hand hole well, it is characterised in that: including oil drain valve (100), anti-overflow cylinder (50), support base (60) and It protects cylinder (70), the support base (60) is equipped with interconnected upper end connector (61) and lower end connector (62), described to unload Oil valve (100) lower end is plugged on end connector (61), and oil drain valve upper end is fixedly connected with blanking cover (40), which sets In the inside of anti-overflow cylinder (50), and support base (60) is fixedly connected with the lower end of anti-overflow cylinder (50), the anti-overflow cylinder (50) upper end is fixedly connected well lid (80), and protection cylinder (70) is sheathed on the outside of anti-overflow cylinder (50), and the upper end It is fixedly connected with anti-overflow cylinder, there is through-hole to pass through for pipe joint (72) for the bottom of the protection cylinder (70), the pipe joint (72) top and bottom connector (62) is tightly connected, and the bottom of protection cylinder is stretched out for connecting external pipe in lower end.

2. bilayer emptying hand hole well according to claim 1, it is characterised in that: close to bottom in the protection cylinder (70) Place is equipped with antiseepage sensor (71), the cable of the antiseepage sensor pass through be arranged in the threading pipeline (74) of protection cylinder lateral wall with The connection of antiseepage sensor is tightly connected between the threading pipeline (74) and protection cylinder lateral wall by conduit seals (75).

3. bilayer emptying hand hole well according to claim 2, it is characterised in that: anti-overflow cylinder (50) upper end it is radial to It is formed extended at both sides upper edge (51) outside, lower end is formed lower edge (52) with extending radially inwardly, the lower edge (52) and branch Support seat (60) is fixedly connected, and is equipped with sealing ring between the two, and the upper edge (51) is equipped with a circle internal thread hole and a circle is outer Threaded hole is arranged in well lid (80) by bolt and well lid is fixed on the upper of upper edge by the outside threaded holes of upper edge (51) Side.

4. bilayer emptying hand hole well according to claim 3, it is characterised in that: protection cylinder (70) upper end radially to It is formed extended at both sides interconnecting piece outside, the internal thread hole of interconnecting piece and upper edge (51) on this is arranged in for protection cylinder by bolt Body is fixed on the downside of upper edge, and the top of protection cylinder (70) is divided into hollow cylindrical structure, and lower part is divided into hollow Polyhedral structure, the threading pipeline (74) is fixedly connected on the either side of polyhedral structure.

5. bilayer emptying hand hole well according to claim 1, it is characterised in that: the support base (60) is equipped with draining valve (63), which is fixed on support base by pressing plate, and the draining valve (63) is internal by pipeline and lower end connector (62) It is connected.

6. bilayer emptying hand hole well according to claim 1, it is characterised in that: the upper end of the pipe joint (72) is under End connector (62) is mutually inserted, and the upper end of the pipe joint (72) is plug division, is equipped with boss (76) in the lower section of plug division, The outside of the plug division is at least provided with a circle seal groove, and the seal groove is interior to be equipped with radial direction seal ring (14), the boss (76) side close to cartridge part is arranged a circle axial sealing ring (13), and the inner sidewall of the lower end connector (62) holds out against convex in this Platform close to cartridge part side and axial sealing ring is squeezed and deformed, the lower end connector inner sidewall and cartridge part contact surface are oblique Face (64), the boss (76) are equipped with multiple threaded holes, and passing through support base (60) and threaded hole by connection bolt will manage Road connector (72) is bolted in support base (60).

7. bilayer emptying hand hole well according to claim 1, it is characterised in that: the oil drain valve (100) includes valve body tube (10) and the spool (11) that is placed in valve body tube, one end of the valve body tube (10) is fixedly connected with quick coupling (20), the other end It is installed with pick-and-place components (12), the pick-and-place components (12) and valve body tube (10) are integrally formed part, on the outside of the pick-and-place components (12) extremely It is equipped with a circle seal groove less, is equipped with radial direction seal ring (14) in the seal groove, the spool (11) is fixedly connected with spool driving Bar (16), the spool drive rod (16) outside are fixedly connected spool spanner (30), and the spool spanner is revolved by spool drive rod Rotary plate (11), the spool control the fluid flow in the valve body tube (10).

8. bilayer emptying hand hole well according to claim 7, it is characterised in that: the spool spanner (30) is in opening-closing process In Zhong≤45 ° angle Shi between the central axis of valve body tube (10), the spool (11) is spherical valve core, the spool (11) valve core seal ring (19) are equipped between valve body tube (10), one end of the quick coupling (20) and valve body tube (10) screw thread It is fixedly connected, the other end connects blanking cover (40), and its outside is equipped with circle groove (21).

9. bilayer emptying hand hole well according to claim 7, it is characterised in that: the valve body tube (10) is close to pick-and-place components (12) it is raised (18) that a circle is radially extended outward to form at, the protrusion (18) is equipped with multiple threaded holes, the screw thread Lock-screw (15) are equipped in hole, rapidly valve body tube and upper end connector (61) are mutually spirally connected by lock-screw (15).

10. bilayer emptying hand hole well according to claim 9, it is characterised in that: the protrusion (18) is close to pick-and-place components (12) side is arranged a circle axial sealing ring (13), and the inner sidewall of the upper end connector (61) is held out against in the protrusion close to inserting The side of part and axial sealing ring is squeezed and deformed, the upper end connector inner sidewall and pick-and-place components contact surface are inclined-plane (64).