CN217480176U - Concrete integral pouring structure of hydraulic turbine set - Google Patents

Abstract

The utility model discloses a hydraulic turbine unit concrete integral pouring structure relates to water electrical engineering building technical field, and the purpose improves the construction quality of pouring of hydraulic turbine unit structure. The utility model discloses a main technical scheme does: hydraulic turbine unit concrete monolithic pouring structure includes: taper pipe, elbow, tail water diffusion pipe, a plurality of first anchor and a plurality of first steel buttress, the taper pipe the elbow with the tail water diffusion pipe connects gradually, constitutes rivers and is responsible for, and is a plurality of first anchor and a plurality of first steel buttress is followed the axial alternant array that rivers were responsible for.

Description

Concrete integral pouring structure of hydraulic turbine set

Technical Field

The utility model relates to a water and electricity engineering building technical field especially relates to a hydraulic turbine unit concrete monolithic pouring structure.

Background

For the concrete construction of a general power generation plant unit, in order to install electromechanical equipment, second-stage concrete is usually required to be reserved in the main body construction process, then the electromechanical equipment is installed, and then the second-stage concrete pouring is carried out. The construction method directly prolongs the whole construction period of the power plant, and has the advantages of large usage amount of template materials and high requirements on the first-stage concrete template, the second-stage concrete template and the size during concrete construction. The reservation of the basic space of the equipment (such as a tail water diffusion pipe, a conical pipe section and an elbow pipe section) is labor-consuming and time-consuming, and the installation of the electromechanical equipment can be carried out only after the strength of the basic concrete reaches 70% of the design value, so that the installation period of the electromechanical equipment is directly influenced. Before the second-stage concrete is poured, the concrete surfaces of the first-stage and second-stage joint parts need to be subjected to scabbling treatment, and only the scabbling treatment of the joint surfaces of the first-stage and second-stage concrete produces construction cold gaps between the joint surfaces of the first-stage and second-stage concrete, so that the water leakage phenomenon can be caused in the later stage.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a hydraulic turbine unit concrete integral casting structure, the main objective improves the construction quality of pouring of hydraulic turbine unit structure.

In order to achieve the above object, the utility model mainly provides the following technical scheme:

the utility model also provides a hydraulic turbine unit concrete monolithic pouring structure, include: the water flow pipe comprises a conical pipe, an elbow pipe, a tail water diffusion pipe, a plurality of first pull anchors and a plurality of first steel buttresses, wherein the conical pipe is sequentially connected with the tail water diffusion pipe to form a water flow main pipe, and the first pull anchors and the first steel buttresses are arranged along the axial direction of the water flow main pipe in an alternating mode.

Optionally, the pipe wall of the tail water diffusion pipe is connected to the overhaul drain pipe.

Optionally, the spiral casing further comprises a spiral casing, a plurality of second anchors and a plurality of second steel buttresses, wherein the plurality of second anchors are sequentially arranged along the extension direction of the flow channel of the spiral casing, and the plurality of second steel buttresses are uniformly distributed on two sides of the arrangement track of the second anchors.

Optionally, the spiral case further comprises a foundation bolt, the lower end of the foundation bolt is fixedly connected to a transverse steel bar, the transverse steel bar is pre-buried in concrete, and the upper end of the foundation bolt is tensioned to the spiral case.

Borrow by above-mentioned technical scheme, the utility model discloses at least, have following advantage:

a plurality of first steel buttresses are supported tight downside that rivers were responsible for in step, and a plurality of first anchor clamps are taut rivers are responsible for in step, and are a plurality of moreover first anchor clamps and a plurality of first steel buttress is followed the axial alternant array that rivers were responsible for to play the purpose of the position of fixed taper pipe, elbow and tail water diffusion tube, avoid fixed taper pipe, elbow and tail water diffusion tube to take place the axial skew when concrete placement, thereby avoid linking department of fixed taper pipe, elbow and tail water diffusion tube to leak, thereby guarantee the quality of pouring of turbine unit.

Drawings

Fig. 1 is a sectional view of a concrete integral casting structure of a hydraulic turbine unit provided by an embodiment of the present invention;

fig. 2 is an enlarged view of a portion a in fig. 1.

Reference numerals in the drawings of the specification include: the device comprises a foundation bottom plate concrete 1, a tail water diffusion pipe 2, an elbow pipe 3, a taper pipe 4, a volute 5, a seat ring 6, a first tie anchor 7, a first steel buttress 8, an overhaul drain pipe 9, a second tie anchor 10 and a second steel buttress 11.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the intended purpose, the following detailed description is given to specific embodiments, structures, features and effects according to the present invention in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

The present invention will be described in further detail with reference to the accompanying drawings and examples.

As shown in fig. 1, on the one hand, an embodiment of the present invention provides a method for integrally casting concrete for a hydraulic turbine unit, which includes: prefabricating a pull anchor and a steel buttress, wherein the pull anchor and the steel buttress are pre-embedded in the foundation slab concrete 1 in advance in the process of pouring the foundation slab concrete 1;

step two, when the strength of the foundation bottom plate concrete 1 reaches 70% of the design strength, the tail water diffusion pipe 2, the elbow pipe 3 and the taper pipe 4 can be installed, the elevation deviation of the steel buttress is controlled to be-5 mm to 0mm, the deviation of the centers and the distribution positions of the tail water diffusion pipe 2, the elbow pipe 3 and the taper pipe 4 is controlled to be within 10mm, and the horizontal deviation of the tail water diffusion pipe 2, the elbow pipe 3 and the taper pipe 4 is controlled to be 1mm/m, wherein after the steel buttress is installed and reinforced, the pull anchor, the jack and the wedge plate are tensioned, and are fixedly welded firmly by an electric welding machine if necessary;

checking the mounting elevations of the tail water diffusion pipe 2, the elbow 3 and the taper pipe 4 by using a level gauge, and checking the verticality and the levelness of the tail water diffusion pipe 2, the elbow 3 and the taper pipe 4 by using the frame type level gauge, wherein the mounting elevation deviation is controlled to be 0-3 mm, the verticality is controlled to be 0.02mm/m, and the levelness is controlled to be 0.03 mm/m;

step four, using a leveling instrument to introduce elevation control points to the vicinity of a pouring part, respectively placing a pair of tower rulers on the tail water diffusion pipe 2, the elbow pipe 3 and the taper pipe 4, measuring the elevation value of each part before pouring, recording, ensuring that the elevation deviation of the tail water diffusion pipe 2, the elbow pipe 3 and the taper pipe 4 is within +/-1 mm in the pouring process, placing a frame type gradienter in the tail water diffusion pipe 2, the elbow pipe 3 and the taper pipe 4, uninterruptedly monitoring the levelness of the tail water diffusion pipe 2, the elbow pipe 3 and the taper pipe 4 so as to control the levelness to be 0.02mm/m, controlling the deviation of a center and a distribution position to be 0.3mm to 0.4mm, performing symmetrical, layering and zoning processes in the concrete pouring process, controlling the rising speed of pouring concrete to be not more than 300mm/h, and controlling the height of the concrete poured on each layer to be 0.5 to 1m, monitoring the stable conditions of the tail water diffusion pipe 2, the elbow 3 and the taper pipe 4 in real time, adjusting the pouring sequence and the pouring speed of concrete in different areas at any time according to actual conditions, and checking the elevation, the axis, the levelness and the verticality of the tail water diffusion pipe 2, the elbow 3 and the taper pipe 4 after the concrete is poured;

and step five, completing the installation and concrete pouring of the volute 5 and the seat ring 6 according to the construction sequence and the control indexes of the step one to the step four, monitoring the stability conditions of the volute 5 and the seat ring 6 in real time in the concrete pouring process, adjusting the pouring sequence and the pouring speed of concrete in different areas at any time according to actual conditions, and checking the elevation, the axis, the levelness and the verticality of the volute 5 and the seat ring 6 after the concrete pouring is finished.

In order to prevent the tail water diffusion section, the elbow 3, the taper pipe 4, the volute 5 and the seat ring 6 from deforming in the pouring process, the control of the concrete pouring rising rate is key.

The concrete integral casting method using the hydraulic turbine set has the following advantages:

(1) civil engineering and equipment installation can be simultaneously constructed, the construction period is obviously shortened, and the civil engineering support (template and support system) materials are obviously reduced. The impervious wall is integrally cast with the diffusion section of the unit, the elbow 3 and the taper pipe 4, the chiseling construction of a reserved second-stage concrete contact surface is avoided, the water leakage problem caused by construction joints is solved, the steel lining and the concrete are in seamless connection during casting, the roughness from the diffusion pipe to tail water is reduced, and water flow is smoother;

(2) the method is simple and accurate in measurement and positioning. The integrally cast concrete for the tail water diffusion section, the elbow 3 and the taper pipe 4 of the unit can be synchronously cast with the downstream tail water impervious wall, the integrity is ensured, the anti-leakage effect is obviously enhanced, the tail water diffusion section, the elbow 3, the taper pipe 4 and the tail water impervious wall are in smooth transition and seamless combination, and no dislocation exists. The water resistance phenomenon of the tail water chamber caused by dislocation is reduced, the abrasion of water flow to concrete is reduced, the water flow in the flow channel is more stable and smooth, and the reliability and the stability of the water turbine are guaranteed.

Taking concrete pouring of the hydraulic turbine set on the same scale as an example, comparing the construction progress of integral concrete pouring and staged concrete pouring of the volute, the following table shows:

remarking: the same work (such as side wall reinforcement, side wall formwork support) before casting is not compared here.

As shown in fig. 1, on the other hand, another embodiment of the present invention further provides a concrete integral casting structure for a hydraulic turbine set, including: taper pipe 4, elbow pipe 3, tail water diffusion pipe 2, a plurality of first anchor 7 and a plurality of first steel buttress 8, taper pipe 4 the elbow pipe 3 with tail water diffusion pipe 2 connects gradually, constitutes rivers and is responsible for, and is a plurality of first anchor 7 and a plurality of first steel buttress 8 is followed rivers are responsible for's axial NULL.

In this embodiment, specifically, a plurality of first steel buttresses 8 synchronously abut against the lower side of the main pipe of the water flow, a plurality of first tie anchors 7 synchronously tension the main pipe of the water flow, and a plurality of first tie anchors 7 and a plurality of first steel buttresses 8 are arranged along the axial direction of the main pipe of the water flow in an alternating manner, so as to achieve the purpose of fixing the positions of the taper pipe 4, the elbow pipe 3 and the tail water diffusion pipe 2, and avoid the axial deflection of the taper pipe 4, the elbow pipe 3 and the tail water diffusion pipe 2 during concrete pouring, so as to avoid the water leakage at the joints of the taper pipe 4, the elbow pipe 3 and the tail water diffusion pipe 2, thereby ensuring the pouring quality of the water turbine set.

In a specific embodiment, the wall of the tail water diffuser pipe 2 is connected to a service drain pipe 9.

In this embodiment, specifically, the maintenance drain pipe 9 is connected to the lower side of the pipe wall of the tail water diffuser pipe 2, and when the hydraulic turbine unit needs maintenance, an operator can drain the residual water in the water flow main pipe from the maintenance drain pipe 9.

In a specific embodiment, the spiral case further comprises a spiral case 5, a plurality of second pull anchors 10 and a plurality of second steel buttresses 11, wherein the plurality of second steel buttresses 11 are sequentially arranged along the extension direction of the flow channel of the spiral case 5, and the plurality of second pull anchors 10 are uniformly distributed on two sides of the arrangement track of the second steel buttresses 11.

In the present embodiment, specifically, the plurality of second steel buttresses 11 respectively abut against the lower surface of the volute 5, and the plurality of second steel buttresses 11 are sequentially arranged along the extending direction of the flow channel of the volute 5, so as to synchronously bear the weight of the volute 5; on the basis, the plurality of second pull anchors 10 respectively tension the volute 5 at two sides of the arrangement track of the second steel buttresses 11, so that the position deviation of the volute 5 relative to the plurality of second steel buttresses 11 is avoided, and the position stability of the volute 5 is improved.

As shown in fig. 1 and fig. 2, in a specific embodiment, the spiral casing further includes an anchor bolt 12, a lower end of the anchor bolt is fixedly connected to a transverse reinforcing bar 13, the transverse reinforcing bar 13 is embedded in concrete, and an upper end of the anchor bolt 12 is tightened to the spiral casing 5 through a nut.

In the present embodiment, the horizontal reinforcing bars 13 are embedded to increase the firmness of the anchor bolts 12 in the concrete, thereby further improving the stability of the volute 5 relative to the concrete foundation.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (4)

1. The utility model provides a hydraulic turbine unit concrete monolithic pouring structure which characterized in that includes:

taper pipe, elbow, tail water diffusion pipe, a plurality of first anchor and a plurality of first steel buttress, the taper pipe the elbow with the tail water diffusion pipe connects gradually, constitutes rivers and is responsible for, and is a plurality of first anchor and a plurality of first steel buttress is followed the axial alternant array that rivers were responsible for.

2. The concrete monolithic casting structure for the hydraulic turbine unit according to claim 1,

and the pipe wall of the tail water diffusion pipe is connected to the overhaul drain pipe.

3. The concrete monolithic casting structure for the hydraulic turbine unit according to claim 1,

the spiral case is characterized by further comprising a spiral case, a plurality of second pull anchors and a plurality of second steel buttresses, wherein the second pull anchors are sequentially arranged along the extension direction of the flow channel of the spiral case, and the second steel buttresses are uniformly distributed on two sides of the arrangement track of the second pull anchors.

4. The concrete monolithic casting structure for the hydraulic turbine unit according to claim 3,

still include rag bolt, rag bolt's lower extreme fixed connection is in horizontal reinforcing bar, horizontal reinforcing bar is pre-buried in the concrete, rag bolt's upper end take-up in the spiral case.

Images