Hydraulic lock of heat exchange chamber door of direct-fired liquid nitrogen evaporator

Abstract

The utility model discloses a hydraulic lock of heat exchange room door of direct combustion type liquid nitrogen evaporator, relates to evaporator auxiliary connecting equipment technical field, it includes evaporator body and sealing cover, sealing cover hinged in the tail of evaporator body, be provided with hydraulic lock mechanism between evaporator body with sealing cover, hydraulic lock mechanism includes hydraulic cylinder and the connecting seat hinged in the both ends of hydraulic cylinder, connecting seat includes the evaporator connecting seat fixedly connected with evaporator, and the cover connecting seat fixedly connected with sealing cover, under the driving force of hydraulic cylinder, sealing cover rotates along its hinged axle, realizes the opening or closure of sealing cover, by this, the utility model utilizes hydraulic lock mechanism, realizes the sealing of quick high quality, further improves the security of maintenance operation.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary connection equipment for evaporators, specifically to a hydraulic lock for the heat exchange chamber door of a direct-fired liquid nitrogen evaporator. Background Technology

[0002] A liquid nitrogen evaporator is a device that utilizes the property of liquid nitrogen to absorb a large amount of heat during evaporation to achieve efficient cooling. Its core principle lies in the endothermic phase change that occurs when liquid nitrogen changes from a liquid to a gaseous state. Direct-fired liquid nitrogen evaporators are commonly used in oilfield special equipment.

[0003] For ease of maintenance, direct-fired liquid nitrogen evaporators are typically equipped with a heat exchange chamber access door at the rear. Traditional evaporator safety doors often use mechanical latches or motor drives, which presents the following problems:

[0004] 1. In high-temperature environments, manual tightening is time-consuming, labor-intensive, and prone to causing burns;

[0005] 2. To ensure airtightness, the protective and sealing structures are often over-designed, increasing manufacturing costs;

[0006] 3. Due to the characteristics of mechanical seals, the equipment may be accidentally started if the door is not locked, which may cause a high-pressure steam leakage accident. Utility Model Content

[0007] To overcome the above-mentioned defects, the purpose of this utility model is to provide a hydraulic lock for the heat exchange chamber door of a direct-fired liquid nitrogen evaporator, which utilizes a hydraulic locking mechanism to achieve a fast and high-quality seal, further improving the safety of maintenance operations.

[0008] To achieve the above objectives, this utility model provides a hydraulic lock for the heat exchange chamber door of a direct-fired liquid nitrogen evaporator, comprising: an evaporator body and a sealing cover plate; the sealing cover plate is hinged to the tail of the evaporator body, and a hydraulic locking mechanism is provided between the evaporator body and the sealing cover plate; the hydraulic locking mechanism includes a hydraulic cylinder and connecting seats hinged to both ends of the hydraulic cylinder; the connecting seats include an evaporator connecting seat fixedly connected to the evaporator and a cover plate connecting seat fixedly connected to the sealing cover plate; under the driving force of the hydraulic cylinder, the sealing cover plate rotates along its hinge axis, thereby opening or closing the sealing cover plate.

[0009] Preferably, the hydraulic locking mechanism consists of two sets, symmetrically arranged on both sides of the evaporator body.

[0010] Preferably, a closed-loop power-off device is also provided between the evaporator body and the sealing cover plate, the closed-loop power-off device being used to control the return distance of the hydraulic cylinder.

[0011] Preferably, the closed power-off device includes a contact and a power-off box. One end of the contact is fixedly connected to the sealing cover plate. The power-off box is provided with a limit switch adapted to the contact, and the limit switch is electrically connected to the electrical control unit of the hydraulic cylinder.

[0012] Preferably, a temperature control display screen is also provided on the outside of the power-off box, and a temperature sensor connected to the temperature control display screen is provided inside the evaporator body.

[0013] Preferably, the evaporator body is provided with a sliding groove, the power-off box is slidably connected to the sliding groove, and a stop is provided at the bottom of the sliding groove.

[0014] The beneficial technical effects achieved by this utility model after adopting the above technical solution are as follows:

[0015] 1. Because a hydraulic locking mechanism is installed between the evaporator body and the sealing cover, the opening ratio of the sealing cover can be automatically controlled by utilizing the characteristics of the hydraulic locking mechanism with a small increase in cost. This greatly shortens the tightening time after the sealing cover is closed, and also avoids safety hazards to operators caused by high-temperature steam.

[0016] 2. Due to the installation of a closed power-off device, the power is quickly cut off when the sealing cover touches the limit switch inside the power-off box during the rotational sealing process. This ensures optimal sealing and prevents the hydraulic cylinder from moving beyond the set value, thus avoiding damage to the equipment. Additionally, a temperature control display screen is installed on the power-off box, providing a clear view of the temperature inside the evaporator and ensuring safety during maintenance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram showing the overall usage state of this utility model;

[0018] Figure 2 This is a three-dimensional structural schematic diagram of the present invention;

[0019] In the diagram,

[0020] 1. Evaporator body; 11. Evaporator connecting base; 12. Slide rail;

[0021] 2. Sealing cover plate; 21. Cover plate connecting seat;

[0022] 3. Hydraulic cylinder;

[0023] 4. Closed power-off device; 41. Contact; 42. Power-off box; 43. Temperature control display screen. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0025] See Figure 1 , Figure 2 This utility model provides a hydraulic lock for the heat exchange chamber door of a direct-fired liquid nitrogen evaporator, comprising: an evaporator body 1 and a sealing cover 2; the sealing cover 2 is hinged to the tail of the evaporator body 1, and a hydraulic locking mechanism is provided between the evaporator body 1 and the sealing cover 2; the evaporator body 1 is existing technology and is used for heat exchange, and the sealing cover 2 at the tail is used for sealing to ensure the sealing requirements under harsh weather conditions.

[0026] The hydraulic locking mechanism includes a hydraulic cylinder 3 and connecting seats hinged to both ends of the hydraulic cylinder 3; the connecting seats include an evaporator connecting seat 11 fixedly connected to the evaporator and a cover plate connecting seat 21 fixedly connected to the sealing cover plate 2; under the driving force of the hydraulic cylinder 3, the sealing cover plate 2 rotates along its hinge axis, realizing the opening or closing of the sealing cover plate 2. The hydraulic locking mechanism is generally used as a set, with two sets of hydraulic locking mechanisms symmetrically arranged, enabling jam-free linear motion (see...). Figure 1 (In the direction of the middle arrow), to eliminate door skewing. A hydraulically controlled check valve with a bidirectional locking unit is installed inside hydraulic cylinder 3, which simplifies the structure and improves sealing.

[0027] Hydraulic cylinder 3 is a mature existing technology. Generally, the cover plate connecting seat 21 and the evaporator connecting seat 11 are welded and fixed to ensure that the installation angle θ of hydraulic cylinder 3 after connection is 15°~30° (preferably 20°), which takes into account both stroke efficiency and lateral stability.

[0028] The evaporator body 1 and the sealing cover plate 2 of this invention are further provided with a closing power-off device 4, which is used to control the return distance of the hydraulic cylinder 3. The closing power-off device 4 is used to control the movement stroke of the hydraulic cylinder 3 to prevent the hydraulic cylinder 3 from continuing to move after the sealing is completed, which would cause severe deformation of the sealing cover plate 2 and affect the sealing effect.

[0029] The closing power-off device of this utility model includes a contact 41 and a power-off box 42. One end of the contact 41 is fixedly connected to the sealing cover plate 2. The power-off box 42 is equipped with a limit switch adapted to the contact 41, and the limit switch is electrically connected to the electrical control unit of the hydraulic cylinder 3. This utility model uses a limit switch to control the movement stroke of the hydraulic cylinder 3. When the contact 41 contacts the limit switch, the hydraulic cylinder 3 is quickly de-energized.

[0030] The power-off box 42 of this invention is also equipped with a temperature control display screen 43 on its outer side, and a temperature sensor connected to the temperature control display screen 43 is installed inside the evaporator body 1. The temperature control display screen 43 is used to display the temperature, especially before maintenance, to reconfirm the temperature of the evaporator body 1 and avoid burns caused by high-temperature steam.

[0031] The evaporator body 1 of this invention is provided with a sliding groove 12, and the power-off box 42 is slidably connected to the sliding groove 12, with a stop block at the bottom of the sliding groove 12. The body of the power-off box 42 slides within the sliding groove 12, and its bottom is supported by the stop block. When long-term maintenance is required, the power-off box 42 can be removed from the sliding groove 12 and placed at the rotation axis of the sealing cover 2 as a temporary safety pad. Even if other operators accidentally touch the switch, the sealing cover 2 will not close, preventing workplace accidents. After use, it can be placed back into the sliding groove 12, and multiple electrical control sockets can be connected without affecting the use of the limit switch.

[0032] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. A hydraulic lock for the heat exchange chamber door of a direct-fired liquid nitrogen evaporator, characterized in that, include: Evaporator body and sealing cover; The sealing cover is hinged to the tail of the evaporator body, and a hydraulic locking mechanism is provided between the evaporator body and the sealing cover. The hydraulic locking mechanism includes a hydraulic cylinder and connecting seats hinged to both ends of the hydraulic cylinder; the connecting seats include an evaporator connecting seat fixedly connected to the evaporator and a cover plate connecting seat fixedly connected to the sealing cover plate. Under the driving force of the hydraulic cylinder, the sealing cover rotates along its hinge axis, thereby opening or closing the sealing cover.

2. The hydraulic lock for the heat exchange chamber door of the direct-fired liquid nitrogen evaporator according to claim 1, characterized in that, The hydraulic locking mechanism consists of two sets, symmetrically arranged on both sides of the evaporator body.

3. The hydraulic lock for the heat exchange chamber door of the direct-fired liquid nitrogen evaporator according to claim 1, characterized in that, A closing power-off device is also provided between the evaporator body and the sealing cover plate. The closing power-off device is used to control the return distance of the hydraulic cylinder.

4. The hydraulic lock for the heat exchange chamber door of the direct-fired liquid nitrogen evaporator according to claim 3, characterized in that, The closed power-off device includes a contact and a power-off box. One end of the contact is fixedly connected to the sealing cover plate. The power-off box is equipped with a limit switch adapted to the contact, and the limit switch is electrically connected to the electrical control unit of the hydraulic cylinder.

5. The hydraulic lock for the heat exchange chamber door of the direct-fired liquid nitrogen evaporator according to claim 4, characterized in that, A temperature control display screen is also installed on the outside of the power-off box, and a temperature sensor connected to the temperature control display screen is installed inside the evaporator body.

6. The hydraulic lock for the heat exchange chamber door of the direct-fired liquid nitrogen evaporator according to claim 4, characterized in that, The evaporator body is provided with a sliding groove, the power-off box is slidably connected to the sliding groove, and a stop is provided at the bottom of the sliding groove.

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