Thermal power generating unit thermotechnical protection equipment

Abstract

The utility model relates to the technical field of thermal power generating units, in particular to thermal power generating unit thermotechnical protection equipment which comprises a shell, a piston is movably arranged in the shell and fixedly connected to one end of a first spring, the first spring is installed on an adjusting assembly, the adjusting assembly is arranged on the top of the shell, and a trigger assembly connected with the piston is further fixedly arranged in the shell. A buzzer and an annular light bar which are electrically connected with the trigger assembly are installed on the outer wall of the shell. The trigger assembly comprises a fixing rod fixedly connected with the piston, an extrusion block is fixedly arranged at the end, away from the piston, of the fixing rod, and a pressed block is arranged on one side of the extrusion block. According to the thermal power generating unit thermotechnical protection equipment, by arranging the trigger assembly, a buzzer and an annular light bar can work during pressure relief, so that a warning effect is achieved on surrounding workers, the workers are made to be far away from the pressure relief position, the workers can be prevented from being scalded by pressure relief steam, the pressure range of pressure relief can be changed, the thermal power generating unit thermotechnical protection equipment is more convenient to use, and the working efficiency is improved. And the range is wider.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of thermal power generating unit, concretely to a thermal power generating unit thermal protection equipment. BACKGROUND

[0002] The main role of thermal protection is to enable automatic protection or interlocking when the thermal power generating unit is in danger of endangering the safety of equipment during starting and running, prevent the expansion of the accident and protect the safety of the thermal power generating unit equipment. However, most of the existing thermal power generating units use a boiler to heat to generate steam and send it to a turbine generator for power generation work. However, when the boiler is heating, the internal air pressure will increase, and a pressure relief device needs to be installed on the boiler to achieve protection effect, so as to avoid overpressure operation of the boiler. When pressure relief, a large amount of steam will be generated at the pressure relief position, and when there are workers nearby, the lack of warning function will easily cause the workers to be scalded, thereby causing certain safety hazards. SUMMARY

[0003] In view of the defects of the prior art, the utility model provides a thermal power generating unit thermal protection equipment, which solves the technical problem of safety hazards to surrounding workers during pressure relief.

[0004] To solve the above technical problems, the utility model provides the following technical scheme: a thermal power generating unit thermal protection equipment, comprising a shell, a piston movably arranged in the shell, the piston being fixedly connected to one end of a spring one, the spring one being installed on an adjusting assembly, the adjusting assembly being arranged at the top of the shell, a trigger assembly being further fixedly arranged in the shell and connected to the piston, a buzzer and a ring-shaped light bar being electrically connected to the trigger assembly and installed on the outer wall of the shell;

[0005] The trigger assembly comprises a fixed rod fixedly connected to the piston, an extrusion block fixedly arranged at the end of the fixed rod away from the piston, a pressure receiving block arranged on one side of the extrusion block, the extrusion block and the pressure receiving block both being of trapezoidal structure, a guide column fixedly arranged on the side wall of the pressure receiving block, the guide column being movably connected to a guide hole formed in the inner wall of the shell, a spring two being sleeved on the outer wall of the guide column, a conductive sheet fixedly arranged on the side wall of the pressure receiving block, a contact base fixedly arranged at the position of the inner wall of the shell close to the pressure receiving block, and at least two conductive contacts fixedly arranged on the contact base.

[0006] Preferably, the adjusting assembly comprises an adjusting screw rotatably connected to the top of the shell, a handle fixedly arranged at one end of the adjusting screw, an adjusting sleeve screwingly and transmissionally connected to the outer wall of the other end of the adjusting screw, the spring one being connected between the piston and the adjusting sleeve, two symmetrically arranged sliding blocks fixedly arranged on the outer wall of the adjusting sleeve, and the sliding blocks being slidably arranged in a sliding groove formed in the inner wall of the shell.

[0007] Preferably, a scale disc is fixedly arranged at the top of the shell, and a pointer cooperatively used with the scale disc is fixedly arranged on the outer wall of the adjusting screw.

[0008] Preferably, the piston is provided with an "L"-shaped pressure relief channel, the outer wall of the shell is provided with a pressure relief hole in the same vertical plane as the pressure relief channel, and the pressure relief hole corresponds to the position of the pressure relief channel.

[0009] Preferably, the outer wall of the piston is sleeved with at least two sealing rings.

[0010] Preferably, the bottom of the shell is a flange structure, and the inner side of the bottom of the shell is provided with a sealing ring.

[0011] By the above technical scheme, the utility model provides a thermal protection device for thermal power generating unit, at least has following beneficial effect:

[0012] 1、 the thermal protection device for thermal power generating unit, through setting trigger assembly, when pressure relief, the piston will be upwardly jolted, extrusion block extrudes pressure block and makes the conductive sheet contact with two conductive contacts at this moment, thereby generates passway and makes the buzzer and annular light bar work, thereby produces warning effect to surrounding staff, makes staff far away from pressure relief position, this can avoid staff being scalded by pressure relief steam.

[0013] 2、 the thermal protection device for thermal power generating unit, through setting adjusting assembly, utilizes adjusting screw rod control adjusting sleeve movement, thereby changes the compression degree of spring one, further can change the pressure range of pressure relief, makes it more convenient when using, and the range is wider. DETAILED DESCRIPTION

[0014] The accompanying drawings, which are included to provide a further understanding of the utility model, constitute a part of this application:

[0015] Figure 1 It is the whole three-dimensional structure schematic diagram of the utility model;

[0016] Figure 2 It is the whole section view of the utility model;

[0017] Figure 3 It is the structure schematic diagram of the connection between adjusting sleeve and piston of the utility model;

[0018] Figure 4 It is the structure schematic diagram of trigger mechanism of the utility model;

[0019] Reference Signs:

[0020] 1, housing; 2, piston; 201, pressure relief channel; 3, spring one; 4, adjusting assembly; 401, handle; 402, adjusting screw; 403, adjusting sleeve; 404, slider; 5, pressure relief hole; 6, trigger assembly; 601, fixed rod; 602, extrusion block; 603, pressure receiving block; 604, guide column; 605, spring two; 606, conductive sheet; 607, contact base; 608, conductive contact; 7, buzzer; 8, ring light bar; 9, dial; 10, pointer; 11, sealing ring one; 12, sealing ring two. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0022] A thermal power generating unit, usually refers to the generator set used by thermal power plant, its main working principle is to use the burning fossil fuel (such as coal, oil or natural gas) to generate heat energy, through a series of conversion process to generate electricity. The main components of thermal power generating unit include boiler, steam engine, turbine generator, cooling system, flue gas treatment system and control system, among which the boiler is the core equipment of thermal power generating unit, responsible for the combustion of fuel and converts the heat energy generated by combustion into steam. The boiler produces high-temperature and high-pressure steam by heating water.

[0023] Based on the technical defects of the prior art that are easy to cause safety hazards to surrounding workers, please refer to Figures 1-4 The utility model provides a kind of thermal power generating unit thermal protection equipment, buzzer 7 and ring light bar 8 will work simultaneously when pressure relief, to produce warning effect to surrounding worker, make worker away from pressure relief position, so as to avoid worker scalded by steam of pressure relief, the equipment includes housing 1, piston 2 is movably arranged in housing 1, piston 2 is fixedly connected at one end of spring one 3, spring one 3 is installed on adjusting assembly 4, adjusting assembly 4 is arranged at the top of housing 1, trigger assembly 6 connected with piston 2 is also fixedly arranged in housing 1, buzzer 7 and ring light bar 8 electrically connected with trigger assembly 6 are installed on the outer wall of housing 1;When using, as the internal pressure of boiler increases, piston 2 is moved upward by pressure, after pressure relief channel 201 in piston 2 and pressure relief hole 5 position correspond, to discharge a part of steam, to achieve the effect of pressure relief, when pressure relief, through the setting of trigger assembly 6, buzzer 7 and ring light bar 8 can be made to work synchronously, to produce warning effect to surrounding.

[0024] When the pressure is released, the buzzer 7 and the ring-shaped light bar 8 need to work automatically, and when the pressure is not released, the buzzer 7 and the ring-shaped light bar 8 do not work, so as to play a warning effect. In order to achieve this purpose, please refer to Figure 4 The trigger assembly 6 comprises a fixed rod 601 fixedly connected with the piston 2, an extrusion block 602 fixedly arranged at one end of the fixed rod 601 away from the piston 2, a pressure receiving block 603 arranged on one side of the extrusion block 602, the extrusion block 602 and the pressure receiving block 603 being both trapezoidal structures, a guide column 604 fixedly arranged on a side wall of the pressure receiving block 603, the guide column 604 being movably connected in a guide hole arranged in an inner wall of the shell 1, a spring 2 605 being sleeved on an outer wall of the guide column 604, a conductive sheet 606 fixedly arranged on the side wall of the pressure receiving block 603, a contact base 607 fixedly arranged at a position of the inner wall of the shell 1 close to the pressure receiving block 603, and at least two conductive contacts 608 fixedly arranged on the contact base 607. When the pressure is released, the piston 2 will be upwardly jolted, at which time the fixed rod 601 will drive the extrusion block 602 to move upwardly, the extrusion block 602 will extrude the pressure receiving block 603 and make the conductive sheet 606 contact with the two conductive contacts 608, so as to generate a passage and make the buzzer 7 and the ring-shaped light bar 8 work, thereby producing a warning effect on the surrounding workers and making the workers keep away from the pressure release position, so that the workers can be prevented from being scalded by the steam released. When the pressure is not released, the conductive sheet 606 is separated from the two conductive contacts 608 under the elastic force of the spring 2 605, so that the passage cannot be generated, and the buzzer 7 and the ring-shaped light bar 8 do not work.

[0025] In actual use, the pressure size of the pressure release needs to be adjusted according to the running state of the on-site equipment. In order to ensure that the pressure size of the pressure release can be adjusted at any time on site, please refer to Figure 2 The adjusting assembly 4 comprises an adjusting screw 402 rotatably connected at the top of the shell 1, a handle 401 fixedly arranged at one end of the adjusting screw 402, a adjusting sleeve 403 screwingly and transmissionally connected on the outer wall of the other end of the adjusting screw 402, the spring 1 3 connected between the piston 2 and the adjusting sleeve 403, and two symmetrically arranged sliding blocks 404 fixedly arranged on the outer wall of the adjusting sleeve 403 and slidably arranged in a sliding groove arranged in the inner wall of the shell 1. The adjusting screw 402 is used to control the movement of the adjusting sleeve 403, so as to change the compression degree of the spring 1 3, and further change the pressure range of the pressure release.

[0026] The pressure of pressure relief is adjusted by rotating the adjusting screw 402, although the adjusting effect can be achieved, but cannot be accurately controlled, therefore, the dial 9 is fixed on the top of the shell 1, and the pointer 10 is fixed on the outer wall of the adjusting screw 402 and cooperates with the dial 9; the adjusting screw 402 can drive the pointer 10 to rotate when rotating, and twelve scales are arranged on the dial 9, and each scale corresponds to the number of rotation of the pointer 10, so that the number of the adjusting screw 402 before the position can be seen through the dial 9, and the specific adjustment of the pressure of pressure relief can be realized by controlling the number of the adjusting screw 402 during subsequent adjustment, so that the effect of accurate adjustment is achieved.

[0027] When pressure relief, the piston 2 is pushed upward by steam, in order to realize the smooth pressure relief, the "L" shaped pressure relief channel 201 is arranged on the piston 2, the pressure relief hole 5 is arranged on the outer wall of the shell 1 and is in the same vertical plane with the pressure relief channel 201, and the pressure relief hole 5 corresponds to the position of the pressure relief channel 201; when pressure relief, the steam drives the piston 2 to move, the piston 2 moves upward until the pressure relief channel 201 is communicated with the pressure relief hole 5, at this time, under the action of the pressure relief channel 201, the steam can be directly introduced to the outside, so as to achieve the effect of pressure relief.

[0028] In order to achieve the sealing effect, it is necessary to arrange a sealing member on the piston 2, but a single sealing member is easy to be damaged, and when it is damaged, direct leakage will be caused, so that the equipment cannot work normally, resulting in economic loss, in order to solve the problem, at least two sealing rings one 11 are sleeved on the outer wall of the piston 2; when one of the sealing rings one 11 fails, the other sealing ring one 11 can still play a sealing effect, so as to avoid the problem of direct leakage.

[0029] In order to facilitate the installation of the whole equipment and improve the sealing performance after installation, the bottom of the shell 1 is in a flange structure, and the inner side of the bottom of the shell 1 is provided with the sealing ring two 12; the design of the flange structure can facilitate the installation of the whole, and under the action of the sealing ring two 12, the sealing performance of the connection between the shell 1 and the equipment is improved, so as to reduce the leakage.

[0030] It should be noted that the terms "comprising", "including", or any other variant thereof are intended to cover non-exclusive inclusions, so that a process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or inherent to such a process, method, article or equipment.

[0031] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A thermal protection device for thermal power units, comprising a housing (1), characterized in that: The shell (1) is movably provided with a piston (2), the piston (2) is fixed at one end of a spring (3), the spring (3) is installed on an adjusting assembly (4), the adjusting assembly (4) is arranged on the top of the shell (1), the shell (1) is further fixedly provided with a trigger assembly (6) connected with the piston (2), and the outer wall of the shell (1) is provided with a buzzer (7) and a ring-shaped light bar (8) electrically connected with the trigger assembly (6). The trigger assembly (6) comprises a fixed rod (601) fixedly connected with the piston (2), a pressing block (602) fixedly arranged at the end of the fixed rod (601) away from the piston (2), a pressure receiving block (603) arranged on one side of the pressing block (602), the pressing block (602) and the pressure receiving block (603) are both in trapezoidal structure, a guide column (604) fixedly arranged on the side wall of the pressure receiving block (603), the guide column (604) is movably connected in a guide hole formed in the inner wall of the shell (1), a spring (605) sleeved on the outer wall of the guide column (604), a conductive sheet (606) fixedly arranged on the side wall of the pressure receiving block (603), and a contact base (607) fixedly arranged on the inner wall of the shell (1) close to the pressure receiving block (603), wherein the contact base (607) is fixedly provided with at least two conductive contacts (608).

2. The thermal protection system for thermal power unit according to claim 1, characterized in that: The adjusting assembly (4) comprises an adjusting screw (402) rotatably connected to the top of the shell (1), a handle (401) fixedly arranged at one end of the adjusting screw (402), an adjusting sleeve (403) screwingly and drivably connected to the outer wall of the other end of the adjusting screw (402), the spring (3) is connected between the piston (2) and the adjusting sleeve (403), and the outer wall of the adjusting sleeve (403) is fixedly provided with two symmetrically arranged sliding blocks (404) slidably arranged in a sliding groove formed in the inner wall of the shell (1).

3. The thermal protection system for thermal power unit according to claim 2, characterized in that: The top of the shell (1) is fixedly provided with a scale disc (9), and the outer wall of the adjusting screw (402) is fixedly provided with a pointer (10) used in cooperation with the scale disc (9).

4. The thermal protection system for thermal power unit according to claim 1, characterized in that: The piston (2) is provided with an "L"-shaped pressure relief channel (201), the outer wall of the shell (1) is provided with a pressure relief hole (5) in the same vertical plane as the pressure relief channel (201), and the pressure relief hole (5) corresponds to the position of the pressure relief channel (201).

5. The thermal protection system for thermal power unit according to claim 1, characterized in that: The outer wall of the piston (2) is sleeved with at least two sealing rings (11).

6. The thermal protection system for thermal power unit according to claim 1, characterized in that: The bottom of the shell (1) is in flange structure, and the inner side of the bottom of the shell (1) is provided with a sealing ring (12).

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