Support for controlling pouring temperature of water distribution ring pipe

Abstract

The utility model discloses a bracket for controlling the pouring temperature of a water distribution ring pipe, which is of a cross-shaped structure and consists of four supporting legs which are crossed in a cross shape; a heat preservation pipe lantern ring allowing a heat preservation pipe to penetrate through is arranged in the center of the supporting leg, the supporting leg is a sleeve of a hollow structure, a spring pressing device composed of a spring and a sliding rod is arranged in the sleeve, and the top of the outer end of the sliding rod is fixedly connected with a pressing plate used for being fixed to the wall of the water distribution pipe in an abutting mode. An edge temperature sensor and a central temperature sensor are respectively arranged at the outer end part of each supporting leg and at the position close to the lantern ring of the central thermal insulation pipe; the front end face of each supporting leg is a water-facing overflowing face of a triangular structure. The bracket is provided with a plurality of groups of water temperature monitoring sensors, so that the water temperature in the water distribution ring pipe can be accurately acquired and controlled; the triangular flow passing surface of the front end face of the support reduces the resistance of the heat preservation pipe supporting device in a hydrostatic test, and meanwhile the springs are arranged to press the supporting legs, so that stable supporting of the constant-temperature heating device is ensured when large deformation is generated in the water distribution ring pipe pressing process.

Description

Technical Field

[0001] The utility model belongs to the technical field of concrete pouring of water conservancy and hydropower construction projects, in particular to the technical field of concrete pouring of water distribution ring pipes of hydro-turbine generator sets, and specifically relates to a temperature control bracket for pouring heat preservation and pressure maintaining concrete of water distribution ring pipes of pelton type hydro-turbine generator sets. Background Art

[0002] In cold and high altitude areas, the temperature difference between day and night is large. The casting of the huge 800MPa water distribution ring pipe is often subject to the influence of the temperature difference between day and night and the heat of concrete hydration, which causes the water distribution ring pipe to deform greatly during the casting process, and the deformation cannot be controlled. If insulation measures are not taken, a large gap will be generated between the water distribution ring pipe and the concrete casting layer, which will directly affect the operating conditions of the unit. The 800MPa water distribution ring pipe is cast with insulation and pressure. The internal medium of the water distribution ring pipe is common water. The volume of the water distribution ring pipe is about 400m 3 The required holding pressure is 5.2MPa. Therefore, the insulation and pressure-maintaining casting of high-pressure, large-capacity water distribution ring pipes is a world problem. It is necessary to monitor the water temperature inside the water distribution ring pipe in real time to understand the changes in the water temperature inside the water distribution ring pipe. At the same time, the 500MPa-level water distribution ring pipe is limited by high-strength steel materials, and no welding form of rigid support can be made on the inner and outer walls of the water distribution ring pipe. Summary of the invention

[0003] The utility model discloses a bracket for controlling the pouring temperature of a water distribution ring pipe in view of the deficiencies of the prior art. The bracket of the utility model can effectively solve the problem of accurate control of the temperature of high-pressure water inside the water distribution ring pipe, ensure that the constant temperature heating device is accurately arranged at the center of the water distribution ring pipe, and instantly and accurately obtain the temperature information inside the water distribution ring pipe, so as to ensure that the deformation of the water distribution ring pipe during concrete pouring is within a controllable range.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A bracket for controlling the pouring temperature of a water distribution ring pipe, the bracket is used to support and fix an insulation pipe of a long tubular structure at the center of the water distribution ring pipe, and is characterized in that: the bracket is a cross-shaped structure, composed of four legs crossing in a cross shape; an insulation pipe collar for accommodating the insulation pipe passing through is arranged at the center of the cross, each leg is a sleeve of a hollow structure, a spring clamping device composed of a spring and a slide rod is arranged in the sleeve, a clamping plate for tightening against the wall of the water distribution pipe is fixedly connected to the top of the outer end of the slide rod, and an edge temperature sensor and a center temperature sensor are respectively arranged at the outer end of each leg and near the center insulation pipe collar.

[0006] Furthermore, the front end surface of each supporting leg is a water-facing flow surface with a triangular structure.

[0007] The support of the utility model is arranged in multiple groups along the thermal insulation pipe at intervals.

[0008] Furthermore, the insulation pipe is a hollow heat transfer pipe that matches the length of the water distribution ring pipe. Four groups of parallel electric heating rods are coaxially arranged in the insulation pipe. One end of the insulation pipe is closed and the other end is sealed with a plug that matches the diameter of the water distribution ring pipe. The insulation pipe is filled with heating medium. A hollow through pipe for arranging a temperature sensor cable is also arranged along the outer wall of the insulation pipe. The insulation pipe at the plug end extends out of the plug plane and is provided with a heating rod joint and a temperature sensor joint.

[0009] A plurality of heat dissipation plates are further arranged at intervals along the axial direction of the heat preservation pipe, and each group of heat dissipation plates has four plates and is fixed to the outer wall of the heat preservation pipe in a cross shape.

[0010] Compared with the prior art, the utility model has the following beneficial effects: multiple groups of water temperature monitoring sensors are arranged on the bracket to ensure the accurate acquisition and control of the water temperature inside the water distribution ring pipe; a vertical flow surface is arranged on the front end face of the bracket to reduce the resistance of the insulation pipe support device during the water pressure test, and spring compression legs are arranged at the same time to ensure stable support of the constant temperature heating device when a large deformation occurs during the pressure testing of the water distribution ring pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of a constant temperature heating device for a water distribution ring pipe;

[0012] Figure 2 This is a schematic diagram of the three-dimensional structure of the bracket of the utility model;

[0013] Figure 3 It is a rear plane schematic diagram of the bracket of the utility model;

[0014] Figure 4 It is a schematic diagram of the overall structure of the water distribution ring pipe.

[0015] Reference numerals in the figure: 1-plug, 2-heat sink, 3-bracket, 4-insulation pipe; 3.1-flow surface, 3.2-insulation pipe collar, 3.3-compression plate, 3.4-spring compression device, 3.5-edge temperature sensor, 3.6-center temperature sensor, 3.7-single temperature measuring line protection pipe, 3.8-center temperature measuring line protection pipe, 5-water distribution ring pipe, 5.1-water distribution ring pipe plug, 5.2-deformation monitoring device. DETAILED DESCRIPTION

[0016] The present invention is further described below in conjunction with specific implementation methods. The specific implementation methods are further descriptions of the principles of the present invention and do not limit the present invention in any way. Technologies identical or similar to the present invention do not exceed the scope of protection of the present invention.

[0017] Combined with the attached pictures.

[0018] As shown in the figure, the temperature control and heating device for water distribution ring pipe of the present invention is composed of a heat preservation pipe 4 and a bracket 3; a heat dissipation plate 2 is arranged on the outer peripheral wall of the heat preservation pipe 4.

[0019] One end of the insulation pipe 4 is fixed to the water distribution ring pipe 5 through a water distribution ring pipe plug 5.1, and a hole is opened through the water distribution ring pipe plug 5.1 for passing through the insulation pipe 4 and its provided heating rod joint and temperature sensor joint. The heating rod joint is used to connect to the power supply, and the temperature sensor joint is used to connect to the sensor signal receiving device.

[0020] A high-power electric heating rod is arranged inside the insulation pipe 4, and a heat sink 2 is arranged on the outer wall; a temperature sensor cable is also arranged along the axial direction of the outer wall. The insulation pipe 4 is filled with heating medium, and the heating rods are connected by high-power heating rods. Each group of heating rods is arranged in sections, and each section of the heating rod is independently connected to the power supply and control switch through a cable.

[0021] like Figure 1 As shown, the water temperature regulating device for heat preservation and pressure preservation of water distribution ring pipe in this embodiment includes a water distribution ring pipe plug 1, a heat sink 2, a bracket 3, and a heat preservation pipe 4. The water distribution ring pipe plug 1 is provided with a heating rod joint and a temperature measuring wire joint; a plurality of heat sinks 2 are arranged on the outer wall of the heat preservation pipe 4 and connected with the heat preservation pipe 4; and the bracket 3 is a cross structure.

[0022] The insulation pipe 4 is a stainless steel pipe with an inner diameter of 300 mm, a maximum bearing pressure of 13 MPa, and is welded in sections to form a whole. It is filled with high-temperature resistant heating medium, and the heating medium is required to be able to withstand high temperatures of 200°C. A sensor cable conduit is set on the outer wall of the insulation pipe 4 for passing the temperature measuring line of the temperature sensor; the water distribution ring pipe plug 1 is installed at the pipe mouth of the water distribution ring pipe 5.

[0023] like Figure 2 and Figure 3 As shown, the bracket 3 is a cross-shaped bracket, which is composed of four legs crossing in a cross shape, and a heat-insulating pipe collar 3.2 for accommodating the heat-insulating pipe 4 to pass through is arranged in the center, and the front end face of each leg is a water-facing flow surface 3.1 of a triangular structure; each leg is a sleeve with a hollow structure, and a spring clamping device 3.4 composed of elasticity and a slide rod is arranged in the sleeve, and the spring clamping device 3.4 is used to support and fix a clamping plate 3.3 fixed to the top of the water distribution pipe wall, and an edge temperature sensor 3.5 and a center temperature sensor 3.6 are respectively arranged at the end of the leg and near the center heat-insulating pipe collar 3.2, and a single temperature measuring line protection tube 3.7 is arranged for each temperature measuring line, and all the temperature measuring lines on the bracket 3 and the temperature monitoring device converge to the center protection tube 3.8 of the temperature measuring line and are transmitted through the external temperature measuring line pipeline, and the above-mentioned single temperature measuring line protection tube 3.7 and the center protection tube 3.8 of the temperature measuring line are both made of 13MPa pressure-resistant material, and the connection method is welding connection.

[0024] A triangular water-facing flow surface 3.1 is arranged on the front end surface of each leg of the bracket, which can reduce fluid resistance and protect and support the overall stability of the temperature sensor.

[0025] The insulation pipe 4 passes through the insulation pipe collar 3.2 and can be stably placed in the axial center of the water distribution ring pipe 5, so that the heating control is more uniform and stable.

[0026] A clamping plate 3.3 and a spring clamping device 3.4 are arranged in the leg, the clamping plate 3.3 is welded on the upper part of the spring clamping device 3.4, the spring clamping device 3.4 is built into the hollow cavity sleeve of the leg, the spring is arranged at the bottom of the leg sleeve, and a movable slide bar is arranged on the upper part, the movable slide bar and the clamping plate 3.3 are welded into a whole, when the water distribution ring pipe is deformed, the contraction force of the spring can ensure that the bracket 3 stands stably in the pipe. The temperature sensors arranged at intervals on the cross-shaped legs monitor the water temperature of the water distribution ring pipe in real time, and the real-time temperature value of the water temperature of the water distribution ring pipe is obtained through the temperature data of multiple measuring points arranged at even intervals.

[0027] During pouring, the power is connected through the heating rod joint, and the heating rod begins to evenly heat the heating medium in the insulation pipe 4. The water temperature inside the water distribution ring pipe is heated through the insulation pipe 4 and the heat sink 2. The changes in water temperature at different sections are monitored to achieve water temperature control.

Claims

1. A bracket for controlling the pouring temperature of a water distribution ring pipe, the bracket is used to support and fix the long tubular structure insulation pipe at the center of the water distribution ring pipe, characterized in that: The bracket is a cross-shaped structure, consisting of four legs crossing in a cross shape; an insulation pipe collar for accommodating the insulation pipe is arranged in the center of the cross, each leg is a hollow sleeve, a spring clamping device consisting of a spring and a slide rod is arranged in the sleeve, and a clamping plate for tightening against the wall of the water distribution pipe is fixedly connected to the top of the outer end of the slide rod, and an edge temperature sensor and a center temperature sensor are respectively arranged at the outer end of each leg and near the center insulation pipe collar.

2. The bracket for controlling the pouring temperature of a water distribution ring pipe according to claim 1, characterized in that: The front end surface of each supporting leg is a water-facing flow surface with a triangular structure.

3. The bracket for controlling the pouring temperature of the water distribution ring pipe according to claim 1 or 2, characterized in that: The brackets are arranged in multiple groups at intervals along the thermal insulation pipe.

4. The bracket for controlling the pouring temperature of the water distribution ring pipe according to claim 3 is characterized in that: The insulation pipe is a hollow heat transfer pipe that matches the length of the water distribution ring pipe. Four groups of parallel electric heating rods are coaxially arranged in the insulation pipe. One end of the insulation pipe is closed and the other end is sealed with a plug that matches the diameter of the water distribution ring pipe. The insulation pipe is filled with heating medium. A hollow through-tube for arranging a temperature sensor cable is also arranged along the outer wall of the insulation pipe. The insulation pipe at the plug end extends out of the plug plane and is provided with a heating rod joint and a temperature sensor joint.

5. The bracket for controlling the pouring temperature of the water distribution ring pipe according to claim 4, characterized in that: A plurality of groups of heat dissipation plates are arranged at intervals along the axial direction of the heat preservation pipe, and each group of heat dissipation plates has four plates and is fixed on the outer wall of the heat preservation pipe in a cross shape.

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