Boiler pressure relief device

Abstract

The utility model relates to the technical field of boiler pressure relief devices, in particular to a boiler pressure relief device. The problem that in the prior art, the pressure relief flow of a boiler pressure relief device is difficult to adjust is solved, and the practicability of equipment is improved. The pressure relief device structurally comprises a shell, a pressure relief cavity is formed in the shell, an air inlet pipe is arranged at the bottom of the pressure relief cavity, a pressure discharge pipe is arranged on the side wall of the pressure relief cavity, a blocking piece is slidably connected into the pressure relief cavity, a limiting structure used for making the blocking piece abut against the air inlet pipe is arranged in the pressure relief cavity, and a first adjusting structure used for adjusting the pressure relief air pressure is arranged in the pressure relief cavity. The pressure discharge pipe is further provided with a second adjusting structure used for adjusting the pressure discharge flow. According to the embodiment, the situation that in the prior art, pressure relief is controlled only through a spring is replaced, the preset pressure of pressure relief can be adjusted, the flow of pressure relief can also be adjusted, and high practicability is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a boiler pressure relief device technical field, specifically, relate to a boiler pressure relief device. BACKGROUND

[0002] The boiler pressure relief device is a safety device set to prevent the boiler from appearing excessively high pressure in the operation process. Its main function is to automatically start and release the excess pressure when the internal pressure of the boiler exceeds the design safety value, to prevent the boiler from exploding or other dangerous accidents.

[0003] The existing boiler pressure relief device is sealed to the air inlet pipe by the spring abutting the pressure relief plate, when the air pressure in the air inlet pipe rises more than the spring force, the air pressure generated by the boiler will move the pressure relief plate away from the air inlet pipe, so that the air pressure generated by the boiler flows out from the air inlet pipe and the air outlet pipe, completing the pressure relief work of the boiler.

[0004] Although this can achieve the pressure relief of the boiler, there are still the following problems: the required pressure relief flow of the boiler with different production requirements is different, if the pressure relief flow of the boiler is too large, it may cause the internal pressure of the boiler to decrease rapidly, making it difficult to maintain the normal level of the internal pressure of the boiler. Influencing the heating and gas supply capacity of the boiler. When the flow in the boiler is too small, it may be difficult to release the pressure in the boiler, and overpressure explosion may occur. UTILITY MODEL CONTENTS

[0005] The utility model provides a boiler pressure relief device, solve the problem that the pressure relief flow of boiler pressure relief device in the prior art is difficult to adjust, improve the practicability of equipment.

[0006] The technical scheme of the utility model is as follows:

[0007] A boiler pressure relief device, including the casing,

[0008] The casing is provided with a pressure relief chamber, the bottom of the pressure relief chamber is provided with an air inlet pipe, the side wall of the pressure relief chamber is provided with a pressure discharge pipe, the pressure relief chamber is slidably connected with a blocking piece, the pressure relief chamber is provided with a limiting structure for abutting the air inlet pipe, the pressure relief chamber is provided with a first adjusting structure for adjusting the pressure relief pressure, and the pressure discharge pipe is further provided with a second adjusting structure for adjusting the pressure discharge flow.

[0009] Further, the limiting structure includes a plurality of limiting springs, the pressure relief chamber is slidably connected with a sliding plate, a plurality of limiting rods are slidably connected on the sliding plate, each limiting rod is fixedly connected with the blocking piece, each limiting spring corresponds to a limiting rod, the limiting spring is sleeved on the limiting rod, and two ends of the limiting spring are fixedly connected with the sliding plate and the blocking piece respectively.

[0010] Further, the first adjusting structure comprises a screw rod, a support frame is fixed in the air inlet pipe, the screw rod is rotationally connected with the support frame pressure relief cavity respectively, the screw rod is threadedly connected with the sliding plate, the screw rod is slidingly connected with the plugging piece, a first driving motor is arranged on the shell, and an output shaft of the first driving motor is fixedly connected with the screw rod.

[0011] Further, a plurality of sliding rods are slidingly connected in the pressure relief cavity, each sliding rod is fixedly connected with the plugging piece, a connecting plate is fixed between the ends of each sliding rod, and a telescopic piece is further arranged on the shell, a fixed end of the telescopic piece is fixedly connected with the shell, and a telescopic end of the telescopic piece is fixedly connected with the connecting plate.

[0012] Further, the second adjusting structure comprises an adjusting piece, the adjusting piece is a spherical structure, an adjusting ball is rotationally connected in the adjusting piece, a flow guide channel is arranged in the adjusting ball, and the adjusting piece is connected with the pressure relief pipe.

[0013] Further, a second driving motor is fixed on the adjusting piece, an output shaft of the second driving motor is fixedly connected with the adjusting ball, the flow guide channel has a circular cross section, and the diameter of the flow guide channel is smaller than the inner wall diameter of the pressure relief pipe.

[0014] Further, the support frame comprises a center plate, a first support rod, a second support rod and a third support rod are fixed around the center plate, the first support rod, the second support rod and the third support rod are fixedly connected with the inner wall of the air inlet pipe, and the screw rod is rotationally connected with the center plate.

[0015] The working principle and beneficial effects of the utility model are as follows:

[0016] The working process of the embodiment is as follows: when the pressure at the time of pressure relief needs to be adjusted, the first driving motor is started, the screw rod drives the sliding plate to move, the elastic force of the limiting spring on the plugging piece changes, so that the pressure at the time of pressure relief is controlled; when the pressure in the boiler does not reach the required pressure at the time of pressure relief, and the pressure in the boiler needs to be relieved, the telescopic piece is retracted, so that the blocking plate moves away from the air inlet pipe, and the air pressure in the air inlet pipe flows out from the air inlet pipe to the air outlet pipe for pressure relief; when the pressure relief flow needs to be adjusted, the second driving motor is started, the adjusting ball is driven to rotate, the air passage area between the flow guide channel and the pressure relief pipe changes, so that the pressure relief flow is controlled.

[0017] In the shell, the pressure relief cavity is arranged, the air inlet pipe, the pressure relief pipe and the plugging piece are arranged in the pressure relief cavity, the plugging piece is controlled to keep plugging the air inlet pipe through the limiting structure, the pressure relief air pressure is controlled through the first adjusting structure, and the pressure relief flow is adjusted through the second adjusting structure. The embodiment replaces the prior art that only controls pressure relief through a spring, the embodiment can not only adjust the preset air pressure at the time of pressure relief, but also can adjust the pressure relief flow, and has strong practicability. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a schematic diagram of the existing technology;

[0020] Figure 2 This is a schematic diagram of the overall structure of this embodiment;

[0021] Figure 3 This is a schematic diagram of the internal structure of the shell in this embodiment. Figure 1 ;

[0022] Figure 4 This is a schematic diagram of the internal structure of the shell in this embodiment. Figure 2 ;

[0023] Figure 5 This is a schematic diagram of the internal structure of the shell in this embodiment. Figure 3 ;

[0024] Figure 6 This is a schematic diagram of the internal structure of the adjusting component in this embodiment;

[0025] Figure 7 This is a schematic diagram of the support frame structure in this embodiment.

[0026] In the picture:

[0027] 1. Housing; 11. Pressure relief chamber; 2. Inlet pipe; 3. Exhaust pipe; 4. Adjusting component; 41. Second drive motor; 42. Adjusting ball; 43. Flow guide channel; 5. Blocking component; 51. Limiting rod; 52. Limiting spring; 53. Limiting bolt; 54. Support frame; 541. Center plate; 542. First support rod; 543. Second support rod; 544. Third support rod; 6. Sliding plate; 7. Sliding rod; 71. Connecting plate; 72. Telescopic component; 8. Lead screw; 81. First drive motor. Detailed Implementation

[0028] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0029] like Figures 2-7 As shown in the figure, this embodiment proposes a boiler pressure relief device, the structure of which includes a shell 1.

[0030] The pressure relief cavity 11 in the embodiment is arranged in the shell 1, the air inlet pipe 2 is arranged at the bottom of the pressure relief cavity 11, and the pressure discharge pipe 3 is arranged on the side wall of the pressure relief cavity 11. The blocking piece 5 is slidingly arranged in the pressure relief cavity 11. In the embodiment, the air inlet pipe 2 is blocked by the blocking piece 5 to prevent gas leakage. The limiting structure is arranged in the pressure relief cavity 11 and used for abutting the blocking piece 5 against the air inlet pipe 2. The first adjusting structure is arranged in the pressure relief cavity 11 and used for adjusting the pressure relief pressure. The second adjusting structure is arranged on the pressure discharge pipe 3 and used for adjusting the pressure discharge flow.

[0031] The limiting structure in the embodiment includes a plurality of limiting springs 52, the sliding plate 6 is slidingly arranged in the pressure relief cavity 11, a plurality of limiting rods 51 are slidingly arranged on the sliding plate 6, each limiting rod 51 is fixedly connected with the blocking piece 5, each limiting spring 52 corresponds to a limiting rod 51, the limiting spring 52 is sleeved on the limiting rod 51, and two ends of the limiting spring 52 are fixedly connected with the sliding plate 6 and the blocking piece 5 respectively. The limiting bolt 53 is arranged at the end of the limiting rod 51 away from the sliding plate 6. In the embodiment, the blocking piece 5 is abutted against the air inlet hole by the limiting spring 52. When the air pressure in the air inlet pipe 2 is greater than the elastic force of the limiting spring 52, the blocking piece 5 is away from the air inlet pipe 2, and the airflow flows from the air inlet hole to the pressure discharge pipe 3 for pressure relief. When the air pressure of the air inlet pipe 2 decreases, the blocking piece 5 blocks the air inlet hole under the action of the limiting spring 52, and the discharge of the pressure discharge pipe 3 is stopped.

[0032] The first adjusting structure in the embodiment includes a lead screw 8, a support frame 54 is fixedly arranged in the air inlet pipe 2, the lead screw 8 is rotationally connected with the support frame 54 and the pressure relief cavity 11 respectively, the lead screw 8 is threadedly connected with the sliding plate 6, the lead screw 8 is slidingly connected with the blocking piece 5, a first driving motor 81 is arranged on the shell 1, and an output shaft of the first driving motor 81 is fixedly connected with the lead screw 8. In the embodiment, the sliding plate 6 is controlled to move by the lead screw 8. Since the rotating stroke of the lead screw 8 is much greater than the movement stroke of the sliding plate 6, the movement of the sliding plate 6 is more accurate and reliable by the lead screw 8. When the first driving motor 81 is in the closed state, the sliding plate 6 no longer slides, and self-locking is realized.

[0033] A plurality of sliding rods 7 are slidingly arranged in the pressure relief cavity 11 in the embodiment, each sliding rod 7 is fixedly connected with the blocking piece 5, a connecting plate 71 is fixedly arranged between the end portions of each sliding rod 7, an extension and contraction piece 72 is arranged on the shell 1, a fixed end of the extension and contraction piece 72 is fixedly connected with the shell 1, and a telescopic end of the extension and contraction piece 72 is fixedly connected with the connecting plate 71. The extension and contraction piece 72 in the embodiment is preferably a hydraulic cylinder or an air cylinder. The hydraulic cylinder or the air cylinder is prior art, and will not be described herein. In the embodiment, the extension and contraction piece 72 is used to control the movement of the blocking piece 5. When the boiler needs to be discharged, and the air pressure in the boiler cannot meet the discharge condition, the blocking piece 5 can be controlled to be away from the air inlet hole by the extension and contraction piece 72, so that manual discharge is realized.

[0034] The second adjusting structure in the embodiment comprises an adjusting piece 4, the adjusting piece 4 is a spherical structure, an adjusting ball 42 is rotationally arranged in the adjusting piece 4, a flow guide channel 43 is arranged in the adjusting ball 42, and the adjusting piece 4 is connected with the pressure relief pipe 3. The gas flow of the exhaust gas in the embodiment passes through the flow guide channel 43 and the pressure relief pipe 3, and the area of the connecting surface between the flow guide channel 43 and the pressure relief pipe 3 is changed by rotating the adjusting ball 42, so that the flow of the gas flow in the exhaust pipe is changed. Therefore, the embodiment can control the flow of the gas flow in the exhaust pipe according to the actual boiler condition.

[0035] The second driving motor 41 in the embodiment is fixedly arranged on the adjusting piece 4, the output shaft of the second driving motor 41 is fixedly connected with the adjusting ball 42, and the cross section of the flow guide channel 43 is a circular structure. The diameter of the flow guide channel 43 is smaller than the inner wall diameter of the pressure relief pipe 3, so that the gas flow in the exhaust pipe is conveniently adjusted. The second driving motor 41 is used for controlling the rotation of the adjusting ball 42 in the embodiment, so that the automation is stronger and the operation is more convenient.

[0036] The support frame 54 in the embodiment comprises a center plate 541, a first support rod 542, a second support rod 543 and a third support rod 544 are fixedly arranged around the center plate 541, the first support rod 542, the second support rod 543 and the third support rod 544 are all fixedly connected with the inner wall of the air inlet pipe 2, and the lead screw 8 is rotationally connected with the center plate 541. Such a design is to facilitate the installation of the rotating lead screw 8, so that the air inlet requirement of the air inlet pipe 2 can be met and the stable installation of the lead screw 8 can be realized.

[0037] The working process of the embodiment is as follows: when the pressure of pressure relief needs to be adjusted, the first driving motor 81 is started, the lead screw 8 drives the sliding plate 6 to move, the elastic force of the limiting spring 52 on the blocking piece 5 is changed, so that the pressure of pressure relief is controlled; when the pressure in the boiler does not reach the required pressure of pressure relief, but the pressure in the boiler needs to be relieved, the contraction and expansion piece 72 is started, so that the blocking plate is away from the air inlet pipe 2, and the air pressure in the air inlet pipe 2 flows out from the air inlet pipe 2 to the air outlet pipe to relieve the pressure; when the pressure relief flow needs to be adjusted, the second driving motor 41 is started, the adjusting ball 42 is driven to rotate, the air passage area between the flow guide channel 43 and the pressure relief pipe 3 is changed, so that the pressure relief flow is controlled.

[0038] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A boiler pressure relief device, comprising a shell (1), characterized in that, The housing (1) is provided with a pressure relief chamber (11), the bottom of the pressure relief chamber (11) is provided with an air inlet pipe (2), the side wall of the pressure relief chamber (11) is provided with a pressure discharge pipe (3), a plug (5) is slidably connected in the pressure relief chamber (11), the pressure relief chamber (11) is provided with a limiting structure for making the plug (5) abut against the air inlet pipe (2), the pressure relief chamber (11) is provided with a first adjustment structure for adjusting the pressure relief air pressure, and the pressure discharge pipe (3) is also provided with a second adjustment structure for adjusting the pressure discharge flow.

2. A boiler pressure relief device according to claim 1, characterized in that, The limiting structure includes several limiting springs (52), a sliding plate (6) is slidably connected in the pressure relief chamber (11), several limiting rods (51) slide on the sliding plate (6), each limiting rod (51) is fixedly connected to the blocking component (5), each limiting spring (52) corresponds to the limiting rod (51), the limiting spring (52) is sleeved on the limiting rod (51), the two ends of the limiting spring (52) are fixedly connected to the sliding plate (6) and the blocking component (5) respectively, and the end of the limiting rod (51) away from the sliding plate (6) is provided with a limiting bolt (53).

3. A boiler pressure relief device according to claim 2, characterized in that, The first adjustment structure includes a lead screw (8), a support frame (54) is fixed inside the air intake pipe (2), the lead screw (8) is rotatably connected to the pressure relief chamber (11) of the support frame (54), the lead screw (8) is threadedly connected to the sliding plate (6), the lead screw (8) is slidably connected to the plug (5), and a first drive motor (81) is provided on the housing (1). The output shaft of the first drive motor (81) is fixedly connected to the lead screw (8).

4. A boiler pressure relief device according to claim 1, characterized in that, The pressure relief chamber (11) is slidably connected with several sliding rods (7), each of the sliding rods (7) is fixedly connected to the blocking component (5), and a connecting plate (71) is fixed between the ends of each sliding rod (7). The housing (1) is also provided with a telescopic component (72), the fixed end of the telescopic component (72) is fixedly connected to the housing (1), and the telescopic end of the telescopic component (72) is fixedly connected to the connecting plate (71).

5. A boiler pressure relief device according to claim 1, characterized in that, The second adjustment structure includes an adjustment component (4), which is a spherical structure. An adjustment ball (42) is rotatably connected inside the adjustment component (4). A flow guide channel (43) is provided inside the adjustment ball (42). The adjustment component (4) is connected to the pressure discharge pipe (3).

6. A boiler pressure relief device according to claim 5, characterized in that, The second drive motor (41) is fixed on the adjusting component (4). The output shaft of the second drive motor (41) is fixedly connected to the adjusting ball (42). The cross-section of the guide channel (43) is circular. The diameter of the guide channel (43) is smaller than the inner wall diameter of the pressure drain pipe (3).

7. A boiler pressure relief device according to claim 3, characterized in that, The support frame (54) includes a center plate (541), and a first support rod (542), a second support rod (543) and a third support rod (544) are fixed around the center plate (541). The first support rod (542), the second support rod (543) and the third support rod (544) are all fixedly connected to the inner wall of the air intake pipe (2). The lead screw (8) is rotatably connected to the center plate (541).

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