An assembled steel elbow-shaped water inlet flow channel, a mounting method and a pump station without a partition

Abstract

The present application relates to water conservancy, municipal, traffic technical field, disclose a kind of assembly type steel elbow type water inlet flow passage, installation method and no pier pump station, including inlet section, elbow section, gradual change section and baffle, gradual change section is assembled by several components;Baffle is set to one end of inlet section;Between baffle and one end of inlet section, between inlet section and gradual change section, between several components of gradual change section, between gradual change section and elbow section, between elbow section and pump station water pump are fixed by fastener mode.The inlet section is fixed inlet section or adjustable inlet section, and the adjustable inlet section is realized by hydraulic jack, hinged two steel plates.In the installation of water inlet flow passage, pump station bottom plate concrete is poured in two stages, and no pier pump station is set.Compared with prior art, the present application can be used in small and medium-sized pump station, ensure the safe and stable operation of water pump, reduce water head loss, improve pump station efficiency, reduce the land area and amount of civil concrete of pump station.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical fields of water conservancy, municipal administration and transportation, and particularly relates to an assembled steel elbow-shaped water inlet channel, an installation method and a non-baffle pier pump station. BACKGROUND

[0002] The water inlet channel is a water flow passage connecting the water inlet pool and the water pump inlet for improving the water pump inlet condition. The water inlet channel is located between the pump station forebay and the water pump, and guides the water flow from the forebay to the water pump. The water flow in the properly designed water inlet channel is orderly and the contraction is gentle, the flow channel has small water head loss, and the water inlet channel hydraulic performance has a direct impact on the pump device performance.

[0003] At present, the elbow-shaped water inlet channel of the large pump station design is mostly a concrete channel formed by a formwork. Because the elbow-shaped water inlet channel has a complex curved surface and each section of the channel is different, the formwork manufacturing process is complicated, the formwork fixing support and positioning requirements are high, the construction technology requirements are high, and the construction period is long. Therefore, the water inlet channel is less used in small and medium-sized pump stations, and a rectangular water inlet pool is often used as a water inlet passage, which leads to poor water inlet flow state, large water power loss, low operation efficiency, and even some pump stations cannot be stably operated due to poor water inlet flow state, and the guide bearing is seriously worn out after long-time operation, resulting in pump shutdown.

[0004] When the large pump station uses a steel water inlet channel, the water inlet channel installation method is to pre-bury the anchor bolts for fixing the water inlet channel in the pouring of the concrete bottom plate, and after the bottom plate concrete reaches the design strength, the channel is fixed on the bottom plate by the bolt pressing method. Such installation method will cause installation stress of the channel, which is not conducive to the overall stiffness of the channel. This installation method has high requirements for bolt installation accuracy and bottom plate flatness, which is difficult to achieve in small and medium-sized projects.

[0005] For small and medium-sized pump stations, a rectangular water inlet pool is used as a water inlet passage. In the process of using multiple pump stations in parallel, each pump occupies an independent water inlet pool, and a pier wall is arranged between the water inlet pools for separation. In addition, a certain width is required between each independent water inlet pool to improve the water inlet flow state. The purpose of separation is to prevent the incoming water flow from interfering with each other. The arrangement of multiple independent water inlet pools for multiple pump stations will make the entire pump station have a large occupied area, which is particularly disadvantageous in urban areas where the occupied area is sensitive.

[0006] The standard for pump station design 10.2.2 provides that: the flow velocity of the inlet section of the pump station inlet channel is preferably 0.8 m / s to 1.0 m / s. In actual operation of the project, the flow and head of the pump station are changed. When the water level of the inlet pool is low, the flow of the pump station will be correspondingly small, which may cause the flow velocity of the inlet section of the inlet channel to be lower than 0.8 m / s; when the water level of the inlet pool is high, the flow of the pump station will be correspondingly large, which may cause the flow velocity of the inlet section of the inlet channel to be higher than 1.0 m / s, thereby reducing the operating efficiency of the pump station. In many cases, it is difficult to meet the conditions for efficient operation of the pump station at various water levels by using a fixed size flow channel.

[0007] The standard for pump station design 10.2.2 provides that: the upper edge of the inlet section of the pump station inlet channel should be submerged at least 0.5 m below the lowest operating water level of the inlet pool. In order to meet the requirement that the upper edge of the inlet section of the inlet channel should be submerged, the elevation of the pump station floor is often designed to be relatively low to meet the submersion requirement of the pump station at the lowest water level, thereby increasing the project investment. On the other hand, when extreme conditions are encountered, i.e. the upper edge of the inlet section of the pump station inlet channel is lower than the operating water level by 0.5 m, the pump station needs to be operated, especially the irrigation pump station, and the flow channel inlet water surface will produce vortex and may enter the flow channel, causing the water pump to operate unstably and produce severe noise. SUMMARY

[0008] The purpose of the application is to solve the problems pointed out in the background art. The application provides a fabricated steel elbow-type inlet flow channel, a mounting method and a non-abutment pump station. By designing a fabricated elbow-type inlet flow channel, it can be used in pump stations, especially in small and medium-sized pump station projects, to ensure the safe and stable operation of the water pump under different working conditions, reduce the loss of water head, improve the efficiency of the pump station, reduce the operating cost of the pump station, reduce the land occupation area and the amount of concrete used in the pump station, and significantly save energy and reduce emissions.

[0009] Technical scheme: The application provides a fabricated steel elbow-type inlet flow channel, which comprises an inlet section, a gradual change section, an elbow section and a baffle plate made of steel material, the gradual change section is assembled by a plurality of components, and the inlet section, the elbow section and the gradual change section are hollow structures; the inlet section, the elbow section and the gradual change section are sequentially assembled and connected, the baffle plate is arranged at one end of the inlet section away from the gradual change section, a gap is arranged in the middle of the baffle plate, and the gap is matched with the hollow section of the one end of the inlet section; the baffle plate and the one end of the inlet section, the inlet section and the gradual change section, the plurality of components of the gradual change section, the gradual change section and the elbow section, and the elbow section and the water pump of the pump station are all fixed by fasteners.

[0010] Further, the inlet section is an adjustable inlet section, comprising a first steel plate arranged on the upper surface of the inlet section as an upper plane thereof, and a second steel plate arranged vertically, the contact surface of the first steel plate with the inlet section and the first steel plate and the second steel plate are connected by hinges, the side plate is connected to the baffle and the inlet section by fasteners, the two ends of the first steel plate and the second steel plate are in contact with the side plate, and the upper end of the second steel plate is provided with a hydraulic jack through a connecting rod, the second steel plate is pulled by the hydraulic jack, and the first steel plate is adjusted and moved upward or downward.

[0011] Further, rubber gaskets are arranged on the two sides of the first steel plate and the second steel plate, and the first steel plate and the second steel plate are connected by extrusion through the rubber gaskets.

[0012] Further, one end of the first steel plate close to the second steel plate is arranged in an arc structure.

[0013] Further, the cross sections of the inlet section and the gradual change section are rectangular structures, and the cross sections thereof gradually change from large to small from the end away from the elbow section to the end close to the elbow section; the cross section of the end of the elbow section matches the cross section of the gradual change section in contact therewith, and the cross section of the other end thereof is a circular structure matching the diameter of the water pump of the pump station; and the cross section of the end of the inlet section matches the cross section of the gradual change section in contact therewith.

[0014] Further, the baffle and the end of the inlet section, the inlet section and the gradual change section, the components of the gradual change section, the gradual change section and the elbow section, and the elbow section and the water pump of the pump station are connected by flanges through bolts, and rubber gaskets are embedded between the flange surfaces.

[0015] The application further discloses a mounting method based on the assembly type steel elbow-shaped water inlet flow channel.

[0016] Step 1: The bottom plate of the pump station is divided into two layers for pouring, and a 15-25 cm second pouring layer is reserved when the first layer of concrete is poured;

[0017] Step 2: After the first layer of concrete reaches the design strength, the concrete surface is roughened;

[0018] Step 3: Assemble the assembly type steel elbow-shaped water inlet flow channel, and position the anchor bolt embedded part;

[0019] Step 4: After the assembly type steel elbow-shaped water flow channel is assembled and the anchor bolt embedded part is positioned, the second layer of concrete is poured by using self-compacting concrete;

[0020] Step 5: The water inlet flow channel assembled in step 3 is fixed to the second layer of the poured bottom plate of the pump station through the anchor bolt embedded part, and the baffle is fixed to the inlet section of the water inlet flow channel assembled in step 3.

[0021] Preferably, a layer of concrete oil release agent is brushed on the bottom of the water inlet channel before the secondary concrete pouring in step 4.

[0022] The water inlet channel is used for wet chamber installation, and a gap of 2-3 cm is arranged between the baffle of the assembled steel elbow-shaped water inlet channel and the side wall of the pump station;

[0023] Or the water inlet channel is used for dry chamber installation, and the baffle, the inlet section and the side wall of the pump station of the assembled steel elbow-shaped water inlet channel are integrally cast, and the baffle and one end of the inlet section, the inlet section and the transition section, the transition section and the elbow section, and the elbow section and the water pump of the pump station are connected by flanges and bolts, and rubber sealing gaskets are embedded between the flange surfaces.

[0024] The application also discloses a non-buttress pump station based on the assembled steel elbow-shaped water inlet channel, which comprises a plurality of water pumps arranged side by side and a pump station side wall and a pump station bottom plate arranged on the periphery, and the pump station bottom plate is sequentially provided with the assembled steel elbow-shaped water inlet channel connected to one side of the plurality of water pumps, and no buttress is arranged between adjacent elbow-shaped water inlet channels. Advantages

[0025] 1. The assembled steel elbow-shaped water inlet channel designed in the application can be applied to various specifications of pump stations, and the channel components are prefabricated in the factory and then transported to the site for assembly and installation. The use of factory production can improve the construction quality of the channel and reduce the process difficulty of the construction period of the channel. The use of assembly production can greatly reduce the weight and size of single components, greatly reduce the transportation and hoisting difficulty, and the advantage is particularly significant in large channel projects.

[0026] 2. For commonly used specifications of small and medium-sized water pumps, if the water inlet channel is designed for each pump station and then processed, the cost will be very high. According to the inlet size of various specifications of water pumps, the assembled steel elbow-shaped water inlet channel is series and standardized, and the standardized assembled steel elbow-shaped water inlet channel is composed of an elbow section, a transition section and an inlet section. Each specification of the series and standardized assembled steel elbow-shaped water inlet channel can meet the optimal hydraulic performance under the condition of the commonly used design flow of the corresponding specification of water pump (for example, the commonly used design flow of 800ZLB type vertical axial flow pump is 2.0 m³ / s), and can also consider the relatively optimal hydraulic performance under the condition of a certain range of commonly used design flow.

[0027] 3、The assembled steel elbow-shaped water inlet flow passage designed by the present application can adopt two installation modes of dry chamber type and wet chamber type. When the dry chamber type installation mode is adopted, the flow passage inlet end is poured together with the reinforced concrete breast wall of the pump station, and rubber water stop gaskets are embedded between the assembled components of the flow passage for water stopping. When the wet chamber type installation mode is adopted, the flow passage is directly placed on the bottom plate of the pump station, and a baffle is arranged at the inlet of the flow passage. The baffle functions to prevent the turbulent flow above the flow passage in the water inlet pool from being sucked into the flow passage. A gap of about 2-3 cm is reserved between the baffle and the two side pier walls of the water inlet pool, which is used for the water flow communication between the inside and outside of the baffle, so that the water levels on both sides of the baffle remain consistent. The gap also serves as the installation tolerance gap of the baffle.

[0028] 4、The inlet section of the present application is divided into fixed type and adjustable type. The fixed type inlet section is suitable for the case that the water level variation amplitude of the pump station is small. The adjustable type inlet section is suitable for the case that the water level variation amplitude of the pump station is large. The size of the inlet section of the water inlet flow passage can be adjusted according to the water level of the water inlet pool, so that the pump station can be efficiently and stably operated under different water levels. In most cases, the water level of the water outlet pool is constant, while the water level of the water inlet pool changes according to different wet and dry years. When designing the pump station, a design water level is selected as the rated water level of the pump station, and the rated power and speed of the motor are selected. In the wet year, the water level of the water inlet pool is higher than the design water level, the water head difference between the water inlet pool and the water outlet pool is small, the flow of the pump station is higher than the rated flow, the inlet flow of the flow passage increases, and the flow velocity correspondingly increases, which leads to the increase of the loss of the pump station. At this time, the upward angle of the inlet section can be raised by the adjustable inlet section, the inlet section area of the flow passage is increased, and the inlet flow velocity is reduced, so as to reduce the inlet loss and improve the operating efficiency of the pump station. In the dry year, the water level of the water inlet pool is lower than the design water level, and the risk of cavitation of the water pump increases with the decrease of the water level, the probability of vortex increases, the water pump operates unstably, the noise is serious, and even the water pump may be damaged and stopped. At this time, the flow of the pump station is less than the design flow, and the inlet flow velocity is lower than the design condition. Therefore, the upward angle of the inlet section can be lowered by the adjustable inlet section, the inlet section area of the flow passage is reduced, and the risk of cavitation of the water pump is reduced by appropriately increasing the inlet flow velocity, so as to ensure that the water pump operates efficiently and stably under the low water level condition.

[0029] 5、The assembled components are directly connected by flanges, and the flange faces are fixed by bolts, so that the installation mode is simple. The assembled steel water inlet flow passage can be directly placed on the top of the wet chamber type water inlet pool pump station bottom plate, and the wet chamber installation mode can be simultaneously applied to new pump station projects and reconstruction pump station projects. For new pump station projects, the installation mode without partition piers can be adopted, the partition piers in the water inlet pool are cancelled, the width of the water inlet pool is greatly reduced, and the wet chamber installation mode or the dry chamber installation mode can be adopted. For the reconstruction project, the wet chamber installation mode can avoid the waterproof requirement required by the dry chamber installation.

[0030] 6、The application is installed in the assembled steel elbow type water inlet flow channel, in order to ensure that the steel flow channel bottom surface is closely combined with the concrete, and also ensure that the flow channel does not produce installation stress, the pump station bottom plate is divided into two layers of pouring, a 30cm second pouring layer is reserved when the first stage concrete is poured. After the first stage concrete reaches the design strength, the concrete surface is chiseled, the flow channel and the anchor bolt embedded part are assembled, after the flow channel and the anchor bolt embedded part are positioned, C60 self-compacting concrete is used for second stage concrete pouring, a layer of concrete oil release agent is brushed on the bottom of the flow channel before the second stage concrete pouring, which can ensure that the steel flow channel bottom surface is closely combined with the concrete, and also does not affect the disassembly of the water inlet flow channel.

[0031] 7、After the water inlet flow channel is used, the water flow disorder section is directly avoided, the water flow is separated at the water inlet flow channel inlet, the partition wall between the multiple pump stations can be cancelled, so that the occupied area is greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 The structure diagram of the inlet section fixed assembled steel elbow type water inlet flow channel of the application;

[0033] Figure 2 The structure diagram of the inlet section adjustable assembled steel elbow type water inlet flow channel of the application;

[0034] Figure 3 The structure diagram of the inlet section fixed assembled steel elbow type water inlet flow channel installed in the pump station of the application;

[0035] Figure 4 The structure diagram of the inlet section adjustable assembled steel elbow type water inlet flow channel installed in the pump station of the application;

[0036] Figure 5 The split structure diagram of the inlet section adjustable assembled steel elbow type water inlet flow channel of the application;

[0037] Figure 6 The split structure diagram of the inlet section of the inlet section adjustable assembled steel elbow type water inlet flow channel of the application;

[0038] Figure 7 The traditional partition pier pump station structure diagram of the application;

[0039] Figure 8 The partition pierless pump station diagram based on the assembled steel elbow type water inlet flow channel of the application.

[0040] Wherein, 0-inlet section, 1-gradual change section, 2-elbow section, 3-baffle, 4-flange, 5-anchor bolt, 6-fastening piece, 7-pump station, 8-bottom plate, 9-side wall, 10-water pump, 11-water pump beam, 12-pier, 13-first steel plate, 14-second steel plate, 15-hinge, 16-connecting rod, 17-hydraulic jack, 18-side plate, 19-rubber gasket. Embodiment

[0041] The application will be further described below with reference to the drawings. The following examples are only used to more clearly illustrate the technical solutions of the application, and cannot be used to limit the protection scope of the application. Embodiment

[0042] The application discloses a fabricated steel elbow-shaped water inlet flow channel, referring to Figure 1 , Figure 3 , mainly comprising an inlet section 0, an elbow section 2, a gradual change section 1 and a baffle 3, the gradual change section 1 is assembled by a plurality of components, specifically, the gradual change section 1 can be assembled by more than one component during prefabrication, the elbow section 2 can be adjusted according to actual required size, in the embodiment, the gradual change section is assembled by two components, and the elbow section 2 is composed of one component, referring to Figure 1 and Figure 2 .

[0043] In the embodiment, the inlet section 0 of the fabricated steel elbow-shaped water inlet flow channel is fixed, referring to Figure 1 and Figure 3 , the inlet section 0, the elbow section 2 and the gradual change section 1 are all hollow structures; the baffle 3 is arranged at one end of the inlet section 0 away from the gradual change section 1, and a gap is arranged in the middle of the baffle 3, the gap is matched with the hollow cross section of the one end of the inlet section 0; the baffle 3 and the one end of the inlet section 0, the inlet section 0 and the gradual change section 1, the plurality of components of the gradual change section 1, the gradual change section 1 and the elbow section 2, and the elbow section 2 and the water pump 10 of the pump station are all fixed by fasteners.

[0044] In the embodiment, the cross sections of the inlet section 0 and the gradual change section 1 are rectangular structures, and the cross section gradually decreases from the one end away from the elbow section 2 to the one end close to the elbow section 2; the cross section of the one end of the elbow section 2 is matched with the cross section of the gradual change section 1 in contact with the one end of the elbow section 2, and the cross section of the other end of the elbow section 2 is a circular structure, which is matched with the diameter of the water pump 10 of the pump station. The cross section of the one end of the inlet section 0 is matched with the cross section of the gradual change section 1 in contact with the one end of the inlet section 0.

[0045] The inlet section 0, the elbow section 2, the gradual change section 1 and the baffle 3 are all made of steel.

[0046] The flange 4 is used to connect the baffle 3 and the one end of the inlet section 0, the inlet section 0 and the gradual section 1, the gradual section 1 and the elbow section 2, and the elbow section 2 and the water pump 10 of the pump station by bolt fastening, and rubber gaskets are embedded between the flange surfaces.

[0047] The fastening pieces 6 are arranged on the inlet section 0, the elbow section 2 and the gradual section 1, one end of the fastening piece 6 is fixed to the side surface of the member, and the other end is tightly attached to the ground, and the ground bolt 5 is arranged at the position where the fastening piece 6 is tightly attached to the ground. Embodiment

[0048] The difference between the embodiment and the embodiment 1 is that the inlet section 0 of the assembled steel elbow-shaped water inlet flow channel in the embodiment is adjustable. Figure 2 、 Figures 4 to 6 The inlet section 0 is an adjustable inlet section, which comprises a first steel plate 13 arranged on the upper surface of the inlet section 0 as an upper plane and a second steel plate 14 arranged vertically, the first steel plate 13 and the second steel plate 14 are connected through the hinge 15 at the contact surface of the first steel plate 13 and the inlet section 0 and the contact surface of the first steel plate 13 and the second steel plate 14, the baffle 3 and the inlet section 0 are further fastened with the side plate 18, the two ends of the first steel plate 13 and the second steel plate 14 are in contact with the side plate 18, and the hydraulic jack 17 is further arranged on the upper end of the second steel plate 14 through the connecting rod 16, the second steel plate 14 is pulled by the hydraulic jack 17, and the first steel plate 13 is adjusted and moved upward or downward.

[0049] Referring to Figure 6 In the embodiment, the first steel plate 13 and the second steel plate 14 are further provided with rubber gaskets 19 on the two sides, and the first steel plate 13 and the second steel plate 14 are connected through the rubber gaskets 19 between the first steel plate 13 and the second steel plate 14 and the side plate 18. One end of the first steel plate 13 close to the second steel plate 14 is arranged in an arc structure. The other structures of the embodiment are the same as those of the embodiment 1, and will not be described here.

[0050] For the adjustable assembled steel elbow-shaped water inlet flow channel described above, the inlet section size of the water inlet flow channel can be dynamically adjusted according to the water level amplitude of the pump station in actual use, the second steel plate 14 is pressed downward or pulled upward by the hydraulic jack 17, and the first steel plate 13 is further driven to adjust the inlet size of the water inlet flow channel. Embodiment

[0051] For the assembled steel elbow-shaped water inlet flow channel disclosed in the embodiment 1 or 2, the application further discloses a mounting method based on the assembled steel elbow-shaped water inlet flow channel, which comprises the following steps:

[0052] Step 1: The bottom plate 8 of the pump station 7 is divided into two layers for pouring, and a 15-25 cm second pouring layer is reserved when the first layer of concrete is poured.

[0053] Step 2: After the first-stage concrete reaches the design strength, the concrete surface is roughened.

[0054] Step 3: Assemble the assembled steel elbow-shaped water inlet channel, and position the anchor bolt embedded part.

[0055] Step 4: After the assembled steel elbow-shaped water inlet channel is assembled and the anchor bolt embedded part is positioned, C60 self-compacting concrete is used for pouring the second-stage concrete. Before pouring the second-stage concrete, a layer of concrete oil release agent is brushed on the bottom of the assembled steel elbow-shaped water inlet channel.

[0056] Step 5: The water inlet channel assembled in step 3 is fixed to the second-stage poured pump station bottom plate through the anchor bolt embedded part.

[0057] For the above installation method, the water inlet channel can be used for wet room installation or dry room installation. When installing in a dry room, the baffle 3 of the assembled steel elbow-shaped water inlet channel, the integral casting between the inlet section 0 and the side wall 9 of the pump station 9, and the flanges 4 are connected by bolts, and rubber water stop pads are embedded between the flange surfaces. When installing in a wet room, a gap of 2-3 cm is provided between the baffle 3 of the assembled steel elbow-shaped water inlet channel and the side wall 9 of the pump station 7. And the component assembly can not increase the rubber water stop pad, and no water stop work is done.

[0058] For the adjustable assembled steel elbow-shaped water inlet channel, the hydraulic jack 17 can be installed on the top wall of the pump station during installation. Embodiment

[0059] The application also discloses a non-buttress pump station based on the above-mentioned assembled steel elbow-shaped water inlet channel, referring to Figure 7 and Figure 8 , Figure 7 is a traditional buttress pump station structure diagram. Traditional small and medium-sized pump stations do not use water inlet channels, but only use water inlet pools. In order to prevent the influence between two pump stations, a buttress 12 is used to block between adjacent pump stations. The non-buttress pump station 7 disclosed by the application comprises a plurality of water pumps 10 arranged side by side and a pump station side wall 9 and a pump station bottom plate 8 arranged on the periphery. The pump station bottom plate 8 is sequentially provided with the assembled steel elbow-shaped water inlet channel as described above (embodiment 1 or embodiment 2) connected to one side of the plurality of water pumps 10. No buttress 12 is arranged between adjacent elbow-shaped water inlet channels.

[0060] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent transformation or modification according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A prefabricated steel elbow-type water inlet channel, characterized in that, It includes a steel inlet section (0), a transition section (1), an elbow section (2), and a baffle (3); The transition section (1) is assembled from several components. The entrance section (0), elbow section (2), and transition section (1) are all hollow structures. The entrance section (0), transition section (1), and elbow section (2) are assembled and connected in sequence. The baffle (3) is located at one end of the entrance section (0) away from the transition section (1), and a notch is provided in the middle. The notch matches the hollow cross section at one end of the entrance section (0). The baffle (3) is fixed to one end of the inlet section (0), the inlet section (0) is fixed to the transition section (1), the transition section (1) is fixed to several components, the transition section (1) is fixed to the elbow section (2), and the elbow section (2) is fixed to the pump station pump (10) by fasteners. The inlet section (0) is an adjustable inlet section, including a first steel plate (13) disposed on the upper surface of the inlet section (0) as its upper plane and a vertically disposed second steel plate (14). The first steel plate (13) and the inlet section (0) are connected by hinges (15) to the first steel plate (13) and the second steel plate (14); the baffle (3) and the inlet section (0) are also fastened with side plates (18), the two ends of the first steel plate (13) and the second steel plate (14) are in contact with the side plates (18), and the upper end of the second steel plate (14) is also equipped with a hydraulic jack (17) through a connecting rod (16). The hydraulic jack (17) is used to pull the second steel plate (14) and drive the first steel plate (13) to move up or down.

2. The assembled steel elbow-type water inlet channel according to claim 1, characterized in that, Rubber gaskets (19) are provided on both sides of the first steel plate (13) and the second steel plate (14), and the first steel plate (13) and the second steel plate (14) are connected to the side plate (18) by the rubber gaskets (19).

3. The assembled steel elbow-type water inlet channel according to claim 1, characterized in that, The end of the first steel plate (13) near the second steel plate (14) is configured as an arc-shaped structure.

4. The assembled steel elbow-type water inlet channel according to claim 1, characterized in that, The inlet section (0) and the transition section (1) have rectangular cross-sections, and their cross-sections decrease from the end away from the elbow section (2) to the end closer to the elbow section (2); the cross-section of one end of the elbow section (2) matches the cross-section of the transition section (1) it contacts, and the cross-section of the other end is circular, which matches the diameter of the pump station pump (10); the cross-section of one end of the inlet section (0) matches the cross-section of the transition section (1) it contacts.

5. The assembled steel elbow-type water inlet channel according to claim 1, characterized in that, The baffle (3) and one end of the inlet section (0), the inlet section (0) and the transition section (1), the several components of the transition section (1), the transition section (1) and the elbow section (2), and the elbow section (2) and the pump station pump (10) are all connected by bolts through flanges (4), and rubber water-stop gaskets are embedded between the flange faces.

6. An installation method for a prefabricated steel elbow-type water inlet channel according to any one of claims 1 to 5, characterized in that, Includes the following steps: Step 1: Divide the base plate (8) of the pump station (7) into two phases for layered pouring. When pouring the first phase of concrete, leave a 15-25cm layer for the second phase. Step 2: After the first-phase concrete reaches the design strength, roughen the concrete surface. Step 3: Assemble the prefabricated steel elbow-shaped water inlet channel as described in any one of claims 1 to 5, and position the anchor bolts. Step 4: After the prefabricated steel elbow-shaped water channel is assembled and the anchor bolts are positioned, the second-stage concrete pouring is carried out using self-compacting concrete. Step 5: Fix the water inlet channel assembled in Step 3 to the pump station base plate (8) cast in the second phase using anchor bolts, and fix the baffle (3) to the inlet section (0) of the water inlet channel assembled in Step 3.

7. The installation method of the prefabricated steel elbow-type water inlet channel according to claim 6, characterized in that, Before pouring the second-stage concrete in step 4, brush a layer of oil-based concrete release agent onto the bottom of the water inlet channel.

8. The installation method of the prefabricated steel elbow-type water inlet channel according to claim 6, characterized in that, The water inlet channel is used for wet chamber installation, and a gap of 2-3cm is provided between the baffle (3) of the prefabricated steel elbow-type water inlet channel and the side wall (9) of the pump station; Alternatively, the water inlet channel is used for dry chamber installation. The baffle (3), inlet section (0) and pump station side wall (9) of the prefabricated steel elbow-shaped water inlet channel are integrally cast. The baffle (3) and one end of the inlet section (0), the inlet section (0) and the transition section (1), the several components of the transition section (1), the transition section (1) and the elbow section (2), and the elbow section (2) and the pump station pump (10) are all connected by bolts through flanges (4). Rubber water-stop gaskets are embedded between the flange faces.

9. A non-diaphragm pumping station based on the prefabricated steel elbow-type water inlet channel as described in any one of claims 1 to 5, characterized in that, It includes several water pumps (10) arranged side by side, and a pump station side wall (9) and a pump station base plate (8) set on the periphery. The pump station base plate (8) is provided with prefabricated steel elbow-shaped water inlet channels as described in any one of claims 1 to 5, which are connected to one side of several water pumps (10). No partition is set between adjacent elbow-shaped water inlet channels.

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