阅读说明：本技术 冰冻隔水式带压检修止水装置 (Freezing water-separating type pressurized maintenance water-stopping device ) 是由 李志� 华明 邵春芬 田鸿彬 陆国荣 时勇 薛利君 乔天平 沈强 姚瑜嘉 付瑞婷 于 2019-12-16 设计创作，主要内容包括：本发明公开了冰冻隔水式带压检修止水装置,用于在更换填料盒内的软填料止水时,以冰冻方式形成隔水带；包括冷冻换热器、冷冻机和测温装置；冷冻机向冷冻换热器输冷冻液；冷冻换热器与填料盒连接,且连接的位置设有温度采集孔槽和工作孔槽；冷冻换热器呈内部中空的环形套在待更换软填料止水的轴上,从外到内依次包括外壳、隔热层、内腔和封板；内腔和封板围成容纳冷冻液的热交换区,封板用金属材料制成,且凹入冷冻换热器的内环面形成一环形的冷冻槽。本发明能够为更换损坏软填料止水创造无水安全的作业环境,且发明装置也可适用于类似密封结构,成本低、作业时间短、安全可靠且操作方便。(The invention discloses a frozen water-stop type pressurized maintenance water stopping device which is used for forming a water stopping strip in a freezing mode when a soft filler in a filler box is replaced for stopping water; comprises a refrigeration heat exchanger, a refrigerator and a temperature measuring device; the refrigerator conveys refrigerating fluid to the refrigerating heat exchanger; the freezing heat exchanger is connected with the stuffing box, and a temperature acquisition hole groove and a working hole groove are arranged at the connecting position; the refrigeration heat exchanger is annularly sleeved on a shaft for stopping water of the soft filler to be replaced in a hollow manner, and sequentially comprises a shell, a heat insulation layer, an inner cavity and a sealing plate from outside to inside; the inner cavity and the sealing plate enclose a heat exchange area for accommodating refrigerating fluid, and the sealing plate is made of metal materials and is recessed into the inner annular surface of the refrigerating heat exchanger to form an annular refrigerating groove. The invention can create a waterless safe operation environment for replacing the damaged soft packing to stop water, and the device can also be suitable for similar sealing structures, and has the advantages of low cost, short operation time, safety, reliability and convenient operation.)

1. The freezing water-proof type pressurized maintenance water stopping device is used for forming a water-proof strip in a freezing mode when the soft packing water stopping (11) in the packing box (1) is replaced; the method is characterized in that: comprises a refrigeration heat exchanger (3), a refrigerator (4) and a temperature measuring device (5); the refrigerator (4) conveys refrigerating fluid to the refrigerating heat exchanger (3);

the freezing heat exchanger (3) is connected with the stuffing box (1); a temperature acquisition hole groove and a working hole groove (12) are arranged at the connecting position of the stuffing box (1) and the freezing heat exchanger (3);

a temperature sensor (51) of the temperature measuring device (5) is arranged in the temperature collecting hole groove and is used for collecting and observing the temperature of the water body near the freezing heat exchanger (3);

the working hole groove (12) is communicated with a water body near the freezing heat exchanger (3) and is used for observing whether the water body near the freezing heat exchanger (3) is frozen, sealed and successfully blocked, or used for injecting and filling similar materials such as a mud-shaped filler and the like;

the refrigeration heat exchanger (3) is sleeved on a shaft (6) of the soft filler water stop (11) to be replaced in a hollow annular manner, and sequentially comprises a shell (31), a heat insulation layer (32), an inner cavity (33) and a sealing plate (34) from outside to inside;

the inner cavity (33) and the sealing plate (34) enclose a heat exchange area for containing the refrigerating fluid, and the sealing plate (34) is made of metal materials and is recessed into the inner ring surface of the refrigerating heat exchanger (3) to form an annular refrigerating groove (35).

2. The frozen water-proof type pressurized maintenance water stopping device according to claim 1, wherein the soft packing water stopping (11) is fixed in the packing box (1) through a gland (2), and a small groove (21) is arranged at the lower part of the outer side of the gland (2).

3. The freezing water-stop type pressurized overhaul water stop device according to claim 1, wherein the freezing heat exchanger (3) is connected with the stuffing box (1) by welding.

4. The freezing water-stop type pressurized overhaul water stop device according to claim 1, wherein the freezer (4) and the freezing heat exchanger (3) are connected through a freezing liquid conveying pipe (41).

5. The freezing water-stop type pressurized maintenance water stop device according to claim 4, wherein a small partition plate (36) is arranged in the heat exchange area enclosed by the inner cavity (33) and the sealing plate (34) to separate the input port and the output port of the refrigerating fluid conveying pipe (41).

Technical Field

The invention relates to the technical field of replacement and maintenance of hydraulic engineering, in particular to a frozen water-proof type pressurized maintenance water-stopping device.

Background

In the prior art, if the soft packing water stopping needs to be replaced and maintained in hydraulic engineering, the original water stopping (such as packing) is usually firstly dismantled, then a new water stopping material is installed, a large amount of water leakage or even water spraying can occur in the process of dismantling the original water stopping and before the new water stopping material is installed, on one hand, the dismounting and mounting operation is not convenient, the installation quality is influenced, the personal safety of operators can be seriously threatened, and on the other hand, the danger of flooding a machine room can be caused due to the large amount of water leakage.

In order to avoid the influence of the above events and the damage and replacement of water stop of soft packing (such as packing) in hydraulic engineering, in the prior art, cofferdam cutoff is usually performed in a river channel or the cutoff is performed by using an overhaul gate, then, a water body in an operation space is pumped to dry, an anhydrous operation environment is created, some safety measures are required to be adopted during construction operation to maintain the anhydrous environment (such as cutoff seepage prevention and continuous drainage), but the cutoff operation time is long, the difficulty and risk are relatively large, the influence is large, the cost is higher (the measure cost is far greater than the cost for replacing the packing), and especially, the cutoff operation condition is not provided under certain working conditions.

Therefore, how to create a safe and anhydrous working environment for replacing the damaged soft filler water seal becomes a technical problem which needs to be solved urgently by the technical personnel in the field.

Disclosure of Invention

In view of the defects in the prior art, the invention provides a frozen water-stop type pressurized maintenance water-stop device, which aims to create a waterless safe operation environment for replacing damaged soft filler to stop water; before the water stop of the soft filler is replaced, the device provided by the invention is adopted, a refrigerator is used for refrigerating partial water body at the front end (river side) of the water stop of the soft filler to freeze to form a frozen belt for water isolation, after the water stop of the soft filler is replaced, the refrigerator is stopped for refrigerating, the frozen belt at the front end (river side) of the water stop of the soft filler can be slowly heated and then melted into water to recover to a perfect state before maintenance, and the device also can be suitable for similar sealing structures (not limited to water stop of the soft filler), and is low in cost, short in operation time, safe, reliable and convenient to operate.

In order to achieve the purpose, the invention discloses a frozen water-stop type pressurized maintenance water stopping device which is used for forming a water stopping strip in a freezing mode when a soft filler in a filler box is replaced for stopping water; comprises a refrigeration heat exchanger, a refrigerator and a temperature measuring device; the refrigerator conveys refrigerating fluid to the refrigerating heat exchanger.

Wherein the cryogenic heat exchanger is connected to the stuffing box; a temperature acquisition hole groove and a working hole groove are formed in the connection position of the stuffing box and the freezing heat exchanger;

a temperature sensor of the temperature measuring device is arranged in the temperature collecting hole groove and is used for collecting and observing the temperature of the water body near the freezing heat exchanger;

the working hole groove is communicated with the water body near the freezing heat exchanger and is used for observing whether the water body near the freezing heat exchanger is frozen, sealing and blocking water successfully or used for injecting and filling similar materials such as mud-shaped filler and the like;

the refrigeration heat exchanger is annularly sleeved on a shaft for sealing water of the soft filler to be replaced in a hollow manner, and sequentially comprises a shell, a heat insulation layer, an inner cavity and a sealing plate from outside to inside;

the inner cavity and the sealing plate enclose a heat exchange area for accommodating the refrigerating fluid, and the sealing plate is made of a metal material and is recessed into the inner annular surface of the refrigerating heat exchanger to form an annular refrigerating groove.

Preferably, the soft packing water stop is fixed in the packing box through a gland, and a small groove is formed in the lower part of the outer side of the gland.

Preferably, the freezing heat exchanger and the stuffing box are connected by welding.

Preferably, the freezer and the freezing heat exchanger are connected by a freezing fluid conveying pipe.

More preferably, a small partition plate is arranged in the heat exchange area enclosed by the inner cavity and the sealing plate to separate the input port and the output port of the refrigerating fluid conveying pipe.

The invention has the beneficial effects that:

(1) the invention adopts a brand-new freezing technology to perform sealing, water-resisting and leaking stoppage, and is an innovation in concept;

(2) the invention directly cools the leakage-proof medium (water, the same below), utilizes the characteristics of the medium material to achieve the effects of self-sealing and self-melting, freezes to seal and leak leakage during cooling, forms water lubrication after heating and thawing, and does not influence the running of the shaft;

(3) the frozen sealing plugging material is a water body, is obtained from the field, does not need to be replaced, and is environment-friendly;

(4) the external structure of the main body of the freezing heat exchanger adopts low-heat-conduction stainless steel materials, and meanwhile, a polyurethane foaming agent is used between the inner ring and the outer ring for heat preservation, so that the energy loss is reduced;

(5) the surface of the rotating shaft is wrapped by a material with small heat conductivity coefficient to be used as a heat insulation layer (such as a polyurethane elastomer, a stainless steel sleeve (the sleeve and the shaft are bonded by epoxy resin), glass fiber reinforced plastics or carbon fiber winding, thermal insulation ceramic spraying and the like), so that the energy consumption is reduced, and the shaft structure is protected from being influenced by low-temperature cold brittleness;

(6) the invention utilizes the conventional method to temporarily block water on the downstream side (the backwater side), for example, temporarily block water on the outer side and the rear side of the packing gland, and can also utilize the working hole groove to inject mud-shaped packing soft substances, thereby reducing the water leakage and the flow rate during freezing, actually realizing the water leakage of 0, effectively avoiding the difficult problem of difficult freezing of flowing water, improving the freezing efficiency and reducing the energy loss.

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.

Drawings

Fig. 1 shows a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic view of a cryogenic heat exchanger sleeved on a shaft according to an embodiment of the present invention.

FIG. 3 is a schematic view of the AA-oriented cross-sectional structure of FIG. 2 according to the present invention.

Fig. 4 is a schematic diagram showing a partial enlarged structure at I in fig. 2 according to the present invention.

FIG. 5 is an assembly diagram of a mold apparatus according to an embodiment of the present invention.

FIG. 6 shows a schematic field installation of a prototype apparatus according to an embodiment of the invention.

FIG. 7 is a schematic diagram illustrating an operating condition of condition one according to an embodiment of the present invention.

FIG. 8 is a schematic diagram of an operating state of condition two according to an embodiment of the present invention.

Detailed Description